WO2009061144A2

WO2009061144A2 - Lock device having a rotating latch separated from cylinder

Info

Publication number: WO2009061144A2
Application number: PCT/KR2008/006563
Authority: WO
Inventors: Gap-Sik Kim
Original assignee: Unipass.Co., Ltd
Priority date: 2007-11-07
Filing date: 2008-11-07
Publication date: 2009-05-14
Also published as: WO2009061144A3; KR20090047213A

Abstract

Disclosed is a lock device having a rotating latch separated from a cylinder, in which a small sized motor is used to reduce power consumption.

Description

LOCK DEVICE HAVING A ROTATING LATCH SEPARATED

FROM CYLINDER

Technical Field

[1] The present invention relates to a lock device, and more particularly, to a lock device having a rotating latch separated from a cylinder. Background Art

[2] A lock device is unlocked by rotating a rotating latch connected with a cylinder after a key inserted into the lock device in a locked state.

[3] Generally, since a cylinder and a rotating latch of the lock device are mechanically connected with each other, if the cylinder is rotated, the rotating latch is also rotated.

[4] The lock device configured such that a rotating latch is mechanically connected with cylinder has a limitation in view of safety in use. In case of most of lock devices, a lock state is maintained in such a manner that an unauthenticated key is not inserted into a cylinder or a cylinder is not rotated even though the unauthenticated key is inserted into the cylinder. However, once the cylinder is rotated for some reason, the lock device is unlocked as the rotating latch connected with the cylinder is rotated together with the cylinder. Accordingly, people who try to illegally unlock the lock device will forcibly rotate the cylinder by inserting an illegal key or another tool into the cylinder.

[5] An electronic lock device is more advantageous than the mechanical lock device. For example, an electronic lock device combined with a microprocessor or computer can be controlled by various methods. For example, when a key is lots, another key can be replaced with the lost key to substitute for a function of the lost key without exchanging the automatic lock device with new one.

[6] The Korean Laid-Open Patent No. 2006-46223 (cited reference 1) discloses a lock device having a cylinder using an electronic key and a rotating latch separated from the cylinder. The lock device disclosed in the cited reference 1 is unlocked in such a manner that although the cylinder and the rotating latch are separated from each other when the lock device is locked, a motor located within the lock device is driven to move a slider when an authenticated electronic key is touched with the lock device, so that the cylinder is combined with the rotating latch and then the cylinder is rotated.

[7] Since the aforementioned lock device is configured such that the cylinder is separated from the rotating latch when it is locked, a rotation force of the cylinder is not transferred to the rotating latch even though the cylinder is rotated, whereby an unlocking state is maintained. Also, only in a state that the motor located within the lock device is driven and the slider moves to combine the cylinder with the rotating latch, the rotating force of the cylinder is transferred to the rotating latch. In this case, the motor located within the lock device is driven when the authenticated electronic key is touched with the lock device.

[8] The lock device disclosed in the cited reference 1 is configured in such a manner that a guide is formed in an inner wall of a cylindrical hollow part of the cylinder and a leg part is provided at the rear of a main body of the slider to forward or retract the leg part of the slider along the guide formed in the cylindrical hollow part of the cylinder. However, this structure has a drawback in that the size of the motor driving the slider becomes great and power consumption increases as a contact area between the leg part of the slider and the guide formed in the inner wall of the cylindrical hollow part of the cylinder becomes large. Also, the lock device disclosed in the cited reference 1 is configured in such a manner that a coupling protrusion is formed at the front of the slider and a coupling groove corresponding to the coupling protrusion is formed in the rotating latch so that the coupling protrusion is inserted into the coupling groove when the slider forwards. This structure also has a drawback in that the coupling protrusion of the slider is not inserted into the coupling groove of the rotating latch if the slider forwards in a little deviated state, whereby the cylinder is not combined with the rotating latch.

[9]

Disclosure of Invention

Technical Problem

[10] Accordingly, the present invention is directed to a lock device having a rotating latch separated from a cylinder, which substantially obviates one or more problems due to limitations and disadvantages of the related art. [11] An object of the present invention is to provide a lock device having a rotating latch separated from a cylinder, in which a small sized motor is used to reduce power consumption. [12] Another object of the present invention is to provide a lock device having a rotating latch separated from a cylinder, in which a cylinder is not rotated in a state that the cylinder is separated from the rotating latch. [13] Other object of the present invention is to provide a lock device having a rotating latch separated from a cylinder, in which the cylinder is combined with or separated from the rotating latch by simple configuration. [14] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[15]

Technical Solution

[16] To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a lock device according to the present invention comprises a cell 100 of a cylindrical hollow, including a first cavity 100a having a first diameter in a part of an inner wall of the cylindrical hollow, a second cavity 100b having a second diameter smaller than the first diameter, stepped with the first cavity in an axis direction, a third cavity 100c connected to the rear of the second cavity, and recesses lOOd and lOOe formed in the second cavity, connected to the first cavity at the same height as that of the first cavity, and stepped in a circumferential direction; a rotating latch 140 having a body part 141 located in the first cavity of the cell, a leg part 141a extended to both sides at a certain interval from the rear of the body part within the first cavity of the cell, a latch part 143 extended from the front of the body part to the outside of the cell; a cylinder 110 located within the third cavity of the cell, having a body part 111 of a hollow, guides 113 and 115 extended to the first cavity of the cell after passing through a step between the first cavity and the second cavity along an axis direction from the body part 111, of which end is surrounded by the leg part 141a of the rotating latch within the first cavity of the cell, having slots 113 and 113b corresponding to the recesses lOOd and lOOe of the cell, and a key touch member coupled to the rear of the body part of the cylinder; a slider 120 of which parts forwarding and retracting along the guides 113 and 115 of the cylinder are extended to the outside through the slots 113a and 113b of the guides of the cylinder, the extended part being inserted into the recesses lOOd and lOOe of the cell when the slider is retracted; a slider driving means located within the cylinder, forwarding the slider; and a control means controlling the slider driving means.

[17] The slider driving means includes a motor 135 located within the hollow of the body part 111 of the cylinder, a motor rotational axis 135a extended to the guides 113 and 115 of the cylinder, and a warm gear 137 coupled to the motor rotational axis.

[18] The slider 120 includes an opening 125 at the center, through which the warm gear

137 passes, and a plate spring 123 of which one end is fixed to the body part of the slider and the other end is secured into a spiral valley of the warm gear 137 which passes through the opening.

[19] Accordingly, if the motor is rotated, the warm gear is rotated, the plate spring fitted into a spiral valley of the warm gear along a rotation direction of the warm gear retracts along an axis direction of the warm gear, and the body part of the slider also retracts together with the plate spring.

[20] The recesses lOOd and lOOe are formed up and down in the second cavity 100b of the cell, and the guides 113 and 115 of the cylinder have upper and lower slots 113a and 113b corresponding to the upper and lower receives lOOd and lOOe formed in the second cavity 100b of the cell. Also, the slider 120 includes upper and lower parts 121a and 121b extended through the upper and lower slots 113a and 113b of the guides.

[21] Accordingly, since the upper and lower parts 121a and 121b of the slider are supported by the upper and lower slots 113a and 113b of the guides 113 and 115 of the cylinder, they forward and retract along the rotation direction of the rotational axis in a state orthogonal to the rotation axis without detachment.

[22] Also, when the slider 120 retracts, since the upper and lower parts 121a and 121b of the slider are respectively inserted into the upper and lower recesses lOOd and lOOe formed in the second cavity 100b of the cell, the slider 120 cannot be rotated along the axial direction.

[23] The lock device according to the present invention further comprises a coupling pin

173 coupling the rotating latch 140 to the cylinder 110 to prevent the rotating latch from running idle in a state that coupling between the cylinder and the rotating latch is released.

[24] In the present invention, the motor 135 is configured to be driven when a code stored in a ROM of an electronic key is identical with a code of EEPROM provided in the lock device. With respect to this structure, the technology of the Korean Patent Publication No. 2001-0001556 titled Electronic Lock System invented by the inventor of this invention could be used.

[25] ROM keys used in the lock system disclosed in the Korean Patent Publication No.

2001-0001556 have unique electronic codes that cannot be deleted or changed. Keys having ROM with such electronic codes (referred to as ROM keys ) are stored in EEPROM of the system through an input terminal and perform their specific function when the electronic codes identified with those stored in the EEPROM are input.

[26] Therefore, the ROM keys have different functions depending on which electronic codes of the ROM keys are stored in the EEPROM of the system. The ROM keys having the electronic codes stored in the EEPROM of the system with the same function have the same function as one another. It is therefore desirable that a memory area of the EEPROM is divided into parts to allow the electronic codes having the same function to be respectively stored therein.

[27] In other words, ROM keys having electronic codes stored in one area perform the same function but those having electronic codes stored in different areas perform different functions. Such ROM keys are provided at various levels. For example, a ROM key of high level controls a ROM key of low level. That is, a ROM key of the first level, i.e., the highest level, stores an electronic code of a specific ROM key in the EEPROM of the system so that the electronic code is used as a ROM key of the second level. Alternatively, the ROM key of the first level is used to delete the electronic code of the specific ROM key and change the electronic code of the ROM key of the first level stored in the EEPROM. Further, the ROM key of the second level stores the electronic codes of the specific ROM keys in the EEPROM so that each electronic code is used as a ROM key of the third level or the fourth level. Alternatively, the ROM key of the second level is used to delete the electronic codes of the specific ROM keys and perform a specific function. Whether the specific ROM key performs the function of the ROM key of the third level or the fourth level depends on that the electronic code of the specific ROM key has been stored in the EEPROM with what function of the ROM key of the second level. The ROM key of the third level stores the electronic code of the specific ROM key in the EEPROM so that it functions as the ROM key of the fourth level, or deletes the electronic code.

[28] An electronic code of another ROM key previously stored in the EEPROM could be stored in the EEPROM or deleted from the EEPROM by controlling an ALU after inputting the electronic code of the ROM key previously stored in the EEPROM to RAM through an input terminal.

[29] As described above, the electronic code of the ROM key previously stored in the

EEPROM could be stored or deleted from a specific area when the ROM key is tou ched with the input terminal to allow the electronic code of the ROM key to be input to the RAM through the input terminal and the electronic codes are identified with each other.

[30]

Advantageous Effects

[31] According to the present invention, a small sized motor can be used to reduce power consumption. A lock device having a rotating latch separated from a cylinder can be manufactured. Also, the cylinder can freely be combined with or separated from the rotating latch.

Brief Description of Drawings

[32] FIG. 1 is a front perspective view illustrating a lock device according to the present invention; [33] FIG. 2 is a rear perspective view illustrating a lock device according to the present invention; [34] FIG. 3 is a perspective view illustrating an electronic key used in a lock device according to the present invention;

[35] FIG. 4 is an exploded perspective view illustrating a rotating latch 140 provided at the front of a cell 100 marked with a silver line and parts combined with the rotating latch 140 in accordance with the present invention;

[36] FIG. 5 is an exploded perspective view illustrating a cell 100 of FIG. 4 and main parts configured within the cell 100;

[37] FIG. 6 is a sectional view of a cell 100 according to the present invention;

[38] FIG. 7 to FIG. 10 are exploded perspective views illustrating an operation according to the location of a slider 120 within a cell according to the present invention;

[39] FIG. 11 to FIG. 13 are perspective views illustrating operations of a cylinder 110, a slider 120, and a rotating latch 140 according to the present invention;

[40] FIG. 14 to FIG. 16 are exploded perspective views illustrating an operation of a lock device according to the present invention; and

[41] FIG. 17 to FIG. 20 are sectional views illustrating an operation of a lock device according to the present invention.

[42]

Best Mode for Carrying out the Invention

[43] For description of the present invention, a front side of a lock device, i.e., a side to which a latch bolt is fixed will be defined as the front, and a key touch side will be defined as the rear, of which technical configuration, operation and effects will be described with reference to the accompanying drawings.

[44] First of all, a structure of a lock device according to the present invention will be described with reference to FIG. 1 to FIG. 6, especially FIG. 4 and FIG. 5.

[45] A cell 100 of a lock device according to the present invention is comprised of a cylindrical hollow therein. A rotating latch 140 is located within the cell 100 of a cylindrical hollow. A latch part 143 of the rotating latch 140 is extended to the outside of the cell 100. A latch bolt 161 is fitted into the latch part 143 of the rotating latch by a nut 165. A reference numeral 163 is a washer inserted between the latch bolt 161 and the nut 165 to firmly secure the latch bolt 161 in the rotating latch 140. A key touch member 150 combined with the cylinder 1010 is exposed to the rear of the cell 100. The key touch member 150 has a groove shaped center part unlike a general type such as an insertion hole. As illustrated in FIG. 2, electric contact terminals 151a and 151b are provided in a wall and a bottom of the groove. Also, the wall of the groove of the key touch member is projected to be caught in a key.

[46] Meanwhile, as illustrated in FIG. 3, a key 190 is provided with electric contact terminals 191a and 191b corresponding to the electric contact terminals 151a and 151b formed in the wall and the bottom of the groove of the key touch member 150. Also, the key is projected in a type opposite to the project of the groove so that the key is inserted into the groove of the key touch member 150.

[47] If the key is inserted into the groove of the key touch member 150, a central processing unit (not shown) provided in an electronic circuit device 155 reads code information of the key 190 and determines whether the inserted key 190 is an authenticated key. If the inserted key is an authenticated key, a motor 135 located within the cylinder 110 is driven so that a rotational axis 135a is rotated, wherein a warm gear 137 is formed in the rotational axis 135a. If the rotational axis 135a of the motor is rotated, a slider 120 fixed to the warm gear 137 of the rotational axis departs from the rotation limit location (recess regions lOOd and lOOe of the cell) and moves to the rotation available location. If the slider 120 moves to the rotation available location, the cylinder 110 also becomes the rotation available state. The rotation limit location and the rotation available location of the cylinder 120 according to the location of the slider 120 within the cell 100 is determined by the inner structure of the cell.

[48] Referring to FIG. 4, FIG. 5 and FIG. 6, the lock device includes a cell 100 of a cylindrical hollow 101, a motor 135 provided with a warm gear 137 on an axis, an electronic circuit device 155 driving the motor, a cylinder 110 combined with a key touch member 150, a slider 120, and a rotating latch 140.

[49] A first cavity 100a and a second cavity 100b are provided within the cell 100 of the cylindrical hollow 101, wherein the second cavity 100b has a diameter smaller than that of the first cavity 100a. The first cavity 100a and the second cavity 100b of the cell 100 are stepped along a diameter direction. Also, recesses lOOd and lOOe are formed above or below the second cavity 100b in the cylindrical hollow of the cell 100, extended along an axis direction from the first cavity 100a, and stepped (10 Ie) along a circumferential direction. A snap ring securing groove lOOf is formed within the first cavity 100a of the cell.

[50] In the cylindrical hollow 10 of the cell 100, a key touch member 150 combined with the cylinder 110 and a body part 111 of the cylinder are received in a third cavity 100c. Guides 113 and 115 projected from the body part 111 of the cylinder are received in the second cavity 100b. Ends of the guides 113 and 115 from the body part 111 of the cylinder 110 are located within the first cavity 100a. A body part 141 of the rotating latch 140 is received in the first cavity 100a. A snap ring 169 is fitted into the front of the body part 141 of the rotating latch 140 and secured in the snap ring securing groove lOOf to prevent the rotating latch 140 from being separated from the cell 100. The recess lOOd formed in the cylindrical hollow of the cell 100 serves to limit rotation of the slider 120. A moving path lOOg of a push member 175 is formed along a circumferential direction in the third cavity 100c of the cylindrical hollow of the cell 100. The moving path lOOg is connected with a hole 109 bored at a side of the cell 100. [51] Also, the cylinder 110 has a cylindrical shape to be received in the third cavity 100c of the cell 100, and its inner side has a hollow to receive the motor 135 and the electronic circuit device 155 therein.

[52] A hole 11 Ib connected with the inner side of the cylinder is bored in a front side

11 Ia of the cylinder. The guides 113 and 115 are projected at both sides of the front side I l ia along the axis direction to surround the hole 11 Ib. The ends of the guides 113 and 115 are extended to the first cavity 100a after passing through the second cavity 100b within the cell 100. The slider 120 is fitted between the guides 113 and 115 to move along the part between the guides 113 and 115. Upper and lower parts of the guides 113 and 115 are spaced apart from each other to form slots 113a and 113b. The slots 113a and 113b communicate with the recesses lOOd and lOOe formed in the second cavity 100b of the cell 100. A hole 11 Ie into which the push member 175 is fitted is formed in a body wall of the cylinder.

[53] Upper and lower parts 121a and 121b of the slider 120 fitted between the guides 113 and 115 of the cylinder are projected to the outside of the guides after passing through the slots 113a and 113b between the guides 113 and 115.

[54] The motor 135 is received within the hollow of the cylinder 110. The rotational axis

135a of the motor received within the hollow of the cylinder 110 is extended between the guides 113 and 115 of the cylinder after passing through the hole 11 Ib of the front side 11 Ia of the cylinder. The warm gear 137 is combined with the rotational axis 135a of the motor. A plate spring 123 combined with the slider 120 is fitted into the warm gear 137. The warm gear 137 forwards or retracts the plate spring 123 in accordance with rotation of the motor 135. If the motor 135 is rotated, the plate spring 123 forwards along the warm gear 137. Also, if the motor 135 is rotated in an opposite direction, the plate spring 123 retracts along the warm gear 137.

[55] The electronic circuit device 155 is fixed to the rear of the motor 135. The key touch member 150 is combined with the rear of the cylinder 110. The electronic circuit device 155 performs a control function of the lock device. In the lock device according to the present invention, among the functions of the electronic circuit device 155, the most important function is that the electronic circuit device 155 determines whether the key touched with the key touch member 150 is an authenticated key and drives the motor 135 if the key is an authenticated key.

[56] If the authenticated key is touched with the key touch member 150, the motor is driven. Driving stop and reverse rotation of the motor can be performed by two methods. One of the methods is that the motor is reversely rotated after a certain time period passes in accordance with one program. The other one is that the motor is reversely rotated by the operation of the push member 175 as shown.

[57] The operation and functions of the push member 175 will be described later in detail. [58] The slider 120 has a narrow width as compared with its height. The upper and lower parts 121a and 121b of the slider 120 are provided with an opening 125 at the center. The height of the slider 120 is substantially equal to or a little smaller than a diameter of the first cavity. The upper and lower parts 121a and 121b of the slider 120 are projected between the guides 113 and 115 of the cylinder. As the slider 120 retracts toward the third cavity, if the upper and lower parts 121a and 121b of the slider projected between the guides 113 and 115 of the cylinder are fitted into the recesses lOOd and lOOe formed in the second cavity 100b of the cell, the slider 120 is bound into the step 10 Ie formed in a circumferential direction, and the cylinder 110 and the slider 120 cannot be rotated. This location is defined as the rotation limit location of the slider and the cylinder. If the slider forwards, the upper and lower parts 121a and 121b of the slider projected between the guides 113 and 115 of the cylinder are detached from the second cavity 100b of the cell and then are fitted into the first cavity 100a of the cell. In this location, the slider 120 can be rotated, and the slider 120 can be rotated as a user forcibly rotates the cylinder 110 using the key 190 inserted into the key touch member 150.

[59] The slider 120 includes a body part 121 and a plate spring 123. The body part 121 of the slider 120 has a height greater than a diameter of the second cavity 100b of the cell and a little smaller than the diameter of the first cavity 100a. An opening 125 is formed in the body part 121 of the slider. The motor rotational axis 135a combined with the warm gear 137 passes through the opening 125. A hook shaped plate spring 123 of which one side is combined with the slider is located in the opening 125 of the slider. The plate spring 123 is provided to be located within a plane orthogonal to the motor rotational axis. Accordingly, the end of the hook shaped plate spring 123 is fitted into a thread of the worm gear 137 which passes through the opening 125. The plate spring 123 forwards or retracts along the thread of the warm gear 137 as the motor is rotated. If the plate spring 123 forwards along the thread of the warm gear 137 as the motor is rotated, the slider 120 also forwards along the guides 113 and 115 of the cylinder and thus moves to the first cavity 100a after being detached from the recesses lOOd and lOOe of the second cavity 100b of the cell. By contrast, if the plate spring 123 of the slider 120 retracts along the thread of the warm gear 137, the slider 120 also retracts and thus moves to the second cavity 100b. If the slider 120 moves to the second cavity 100b of the cell, the upper and lower parts 121a and 121b of the body part of the slider extended through the slot between the guides 113 and 115 are again inserted into the recesses lOOd and lOOe and then bound into the circumferential step lOle, whereby the slider 120 cannot be rotated.

[60] Since the slider 120 is fitted into the guides 113 and 115 of the cylinder, rotation of the cylinder can be performed or limited depending on whether the slider 120 is in the rotation available location or the rotation limit location. Namely, the cylinder 110 cannot be rotated if the upper and lower parts 121a and 121b of the slider projected between the guides 113 and 115 of the cylinder are fitted into the recesses lOOd and lOOe formed in the second cavity 100b of the cell after the slider 120 retracts. However, the cylinder 110 can be rotated if the upper and lower parts 121a and 121b of the slider projected between the guides 113 and 115 of the cylinder are detached from the second cavity 100b of the cell and then moves to the first cavity 100a after the slider 120 forwards.

[61] The rotating latch 140 is located at the front of the cylinder 110 within the cell 100.

[62] The body part 141 of the rotating latch 140 is located within the first cavity 100a of the cell, and the latch part 143 is longitudinally extended at the front of the body part and then exposed to the outside of the cell 100. The leg part 141a is projected at the rear of the body part 141 of the rotating latch 140. The leg part 141a of the rotating latch 140 surrounds a part of a front side of the guides 113 and 115 of the cylinder projected toward the front of the cylinder 110 within the first cavity 100a of the cell.

[63] Accordingly, if the slider 120 which forwards and retracts between the guides 113 and 115 of the cylinder forwards, the slider 120 moves to the part which surrounds the part of the front side of the guides 113 and 115 of the cylinder projected toward the front of the cylinder 110 and couples the cylinder 110 to the rotating latch 140. In this state, if the cylinder is forcibly rotated using the inserted key, the rotating latch 140 is also rotated. Meanwhile, if the slider 120 which forwards and retracts between the guides 113 and 115 of the cylinder retracts along the guides 113 and 115 of the cylinder and returns to the recesses lOOd and lOOe within the second cavity from the first cavity 103 of the cell, coupling between the cylinder 110 and the rotating latch 140 is released.

[64] The latch part 143 of the rotating latch is secured into a rotation limit member 167 of the rotating latch, latch bolt 161 and a washer 163 by a nut 165 in due order. The rotation limit member 167 of the rotating latch limits the rotating latch 140 to be rotated within a certain angle range. If the rotating latch 140 is rotated at a certain angle in forward direction or reverse direction, projections 167a and 167b of the rotation limit member 167 of the rotating latch reach any one of angle limit members 103 and 105 projected up and down at the front of the cell so as to exceed a certain angle. This serves to prevent a wire from being twisted if the power is supplied to the electronic circuit device 155 using the wire wired through a through hole formed in the rotating latch 140.

[65] However, the power supply to the electronic circuit device 155 is not limited to the wire wired through the through hole formed in the rotating latch 140, and can be performed by other various routes and methods. [66] A reference numeral 171 denotes a spring which serves to exactly guide the locking location and the unlocking location when the rotating latch 140 is rotated. A reference numeral 173 denotes a coupling pin which couples the rotating latch 140 to the cylinder 110. This coupling pin 173 serves to support the rotating latch 140 so as not to run idle in a state that coupling between the rotating latch 140 and the cylinder is released by the slider 120.

[67] Meanwhile, in the hollow of the cylinder 110, a switching contact point 157b and an elastic terminal plate 159b connected with conductors 157a and 159a from the electronic circuit device 155 fixed to the rear of the motor 135 are projected toward the front side. The switching contact point 157b and the elastic terminal plate 159b are pushed by the push member 175 moving along the moving path lOOg of the cell 100 to maintain the contact state. However, if the push member 175 reaches the location of the hole 109 bored at the side of the cell 100 in accordance with rotation of the cylinder 110, the push member 175 is pushed to the outside of the hole 109 by elasticity of the spring 177 located between the hole 11 Ie to which the push member 175 is fitted and the moving path lOOg of the push member to elastically support the push member 175. In this state, the push member 175 cannot push the elastic terminal plate 159b any more. For this reason, the elastic terminal plate 159b is detached from the switching contact point 157b.

[68] The switching operation according to the push member 175 is transferred to the electronic circuit device 155 to reset the lock device to an initial state or switch a rotation direction of the motor 135. Also, the switching operation according to the push member 175 can be used for various purposes of use, which are not described, in accordance with the program of the electronic circuit device 155.

[69] Subsequently, the operation of the lock device according to the present invention will be described with reference to FIG. 7 to FIG. 20.

[70] FIG. 7, FIG. 11, FIG. 14 and FIG. 17 illustrate that the slider 120 of the lock device according to the present invention is reset. The upper and lower parts 121a and 121b of the slider are fitted into the recesses lOOd and lOOe so that the slider 120 is bound into the circumferential step 10 Ie formed in the second cavity 100b of the cell, whereby the slider 120 cannot be rotated. Since FIG. 7 and FIG. 11 illustrate that the slider 120 retracts, coupling between the cylinder 110 and the rotating latch 140 is released. Accordingly, in a state that the slider 120 is fitted into the recesses lOOd and lOOe as illustrated in FIG. 7 and FIG. 11, i.e., in a state that the slider is reset, the cylinder 110 cannot be rotated within the hollow of the cell 100, and the cylinder and the rotating latch 140 maintain the locking state in a state that their coupling is released.

[71] In the state of FIG. 7, FIG. 11, FIG. 14 and FIG. 14, if the authenticated key 190 is touched with the key touch member 150, the motor 135 is driven. While the motor is driven, the plate spring 123 forwards along the warm gear 137 and moves the slider 120 to the front. The motor continues to drive until the slider 120 is detached from the second cavity 100b of the cell and then fully inserted into the coupling location between the cylinder 110 and the rotating latch 140.

[72] FIG. 8, FIG. 12, FIG. 15 and FIG. 18 illustrate that the slider 120 forwards and then is detached from the circumferential step 10 Ie formed in the second cavity 100b to couple the cylinder 110 to the rotating latch 140 in the first cavity 100a. At this time, the upper and lower parts 121a and 121b of the slider are detached from the recesses lOOd and lOOe of the cell and then are released from the circumferential step so that they can be rotated. The slider 120 couples the cylinder 110 to the rotating latch 140. In this state, the cylinder 110 and the rotating latch 140 can simultaneously be rotated.

[73] FIG. 9, FIG. 13, FIG. 16 and FIG. 19 illustrate that the lock device is opened as the cylinder 110 is rotated using a key, i.e., the lock device is unlocked as the rotating latch 140 is rotated. In a state that the cylinder 110 is coupled to the rotating latch 140 by the slider 120, if the cylinder 120 is rotated using a key, the rotation operation of the cylinder is transferred to the rotating latch 140 to release the locking state of the lock device.

[74] FIG. 10 and FIG. 20 illustrate that the plate spring 123 is pulled to the third cavity as the motor is reversely rotated in a state that the lock device is unlocked.

[75] The reverse rotation of the motor 135 is performed as reverse rotation current is automatically supplied to the motor by the electronic circuit device 155 if a certain time passes from the unlocking state. Alternatively, the reverse rotation of the motor 135 may be performed as the push member 175 is located in the hole 109 to switch contact of the elastic terminal plate 159b, wherein the hole 109 is formed in the moving path lOOg of the push member 175, when the cylinder 110 is rotated to unlock the lock device. Namely, in the state of FIG. 9, FIG. 13, FIG. 16, and FIG. 19, if the motor is reversely rotated, the plate spring 123 retracts along the warm gear 137 to pull the slider 120 to the rear. However, since the cylinder 110 is already rotated when the lock device is unlocked, the slots between the guides 113 and 115 are deviated from the recesses lOOd and lOOe formed in the second cavity 100b of the cell, whereby the slider 120 is caught in the step 10 Id between the first cavity 100a and the second cavity 100b without being inserted into the recesses lOOd and lOOe formed in the second cavity 100b. Accordingly, if the cylinder is reversely rotated by the key, the slots 113a and 113b between the guides correspond to the recesses lOOd and lOOe formed in the second cavity 100b of the cell, and the slider 120 is inserted into the upper and lower recesses lOOd and lOOe by elasticity of the plate spring 123 and again bound into the circumferential step 10 Ie formed in the second cavity 100b, whereby the slider 120 is reset to the locking state in which the slider 120 cannot be rotated. [76] Also, as be aware of it from FIG. 11 to FIG. 13, the slider 120 moves along the part between the guides 113 and 115 extended to the front of the body part of the cylinder, and the leg part 141a of the rotating latch 140 surrounds a part of the front side of the guides 113 and 115. In a state that the slider 120 retracts as illustrated in FIG. 11, the cylinder 110 is separated from the rotating latch 140. In this state, the cylinder cannot be rotated.

[77] If the slider 120 forwards and then is inserted into the leg part 141a of the rotating latch 140 as illustrated in FIG. 12, the cylinder 110 is coupled to the rotating latch 140. In this state, the cylinder can be rotated, and the rotation force of the cylinder is transferred to the rotating latch.

[78] In a state that the slider 120 forwards and then is inserted into the leg part 141a of the rotating latch 140 to couple the cylinder 110 to the rotating latch 140, if the cylinder and the rotating latch are rotated to unlock the lock device, the structure of FIG. 13 is obtained.

[79] Also, in a state that the slider 120 retracts as illustrated in FIG. 14, the cylinder 110 is separated from the rotating latch 140. In this state, the cylinder cannot be rotated.

[80] If the slider 120 forwards and then is inserted into the leg part 141a of the rotating latch 140 as illustrated in FIG. 15, the cylinder 110 is coupled to the rotating latch 140. In this state, the cylinder and the rotating latch are simultaneously rotated.

[81] The slider moves between the guides extended to the front of the body part of the cylinder. The leg part 141a of the rotating latch 140 surrounds the part of the front side of the guides 113 and 115 of the cylinder projected to the front of the cylinder 110. In a state that the slider retracts as illustrated in FIG. 17, the cylinder is separated from the rotating latch. In this state, the cylinder 110 cannot be rotated.

[82] If the slider 120 forwards and then is inserted into the leg part 141a of the rotating latch 140 which surrounds the part of the front side of the guides 113 and 115 of the cylinder as illustrated in FIG. 18, the cylinder 110 is coupled to the rotating latch 140. In this state, the cylinder 110 and the rotating latch 140 can be rotated.

[83] After the slider 120 forwards and then is inserted into the leg part 141a of the rotating latch 140 which surrounds the part of the front side of the guides 113 and 115 of the cylinder to couple the cylinder 110 to the rotating latch 140, if the motor 135 is reversely rotated in a state that the cylinder 110 and the rotating latch 140 are rotated, the plate spring 123 retracts along the warm gear 137 and at the same time pulls the body part 121 of the slider to the rear. However, since the cylinder 110 is already rotated when the lock device is unlocked, the slots between the guides 113 and 115 are deviated from the recesses lOOd and lOOe formed in the second cavity 100b of the cell, whereby the body part 121 of the slider 120 is caught in the step 10 Id between the first cavity 100a and the second cavity 100b without being inserted into the recesses lOOd and lOOe formed in the second cavity 100b. [84] FIG. 20 illustrates that the body part 121 of the slider pulled by the plate spring 123 is caught in the step 101d between the first cavity 100a and the second cavity 100b. [85] If the cylinder is rotated using a key in the state of FIG. 20, the upper and lower parts of the body part of the slider are inserted into the recesses lOOd and lOOe by elasticity of the plate spring 123 and bound into the circumferential step 10 Ie formed in the second cavity 100b, whereby the slider 120 is reset to the locking state in which the slider 120 cannot be rotated. [86]

Industrial Applicability [87] The present invention can be used for all electronic lock devices mounted on general doors. [88]

Claims

[1] A lock device comprising: a cell 100 of a cylindrical hollow, including a first cavity 100a having a first diameter in a part of an inner wall of the cylindrical hollow, a second cavity 100b having a second diameter smaller than the first diameter, stepped with the first cavity in an axis direction, a third cavity 100c connected to the rear of the second cavity, and recesses lOOd and lOOe formed in the second cavity, connected to the first cavity at the same height as that of the first cavity, and stepped in a circumferential direction; a rotating latch 140 having a body part 141 located in the first cavity of the cell, a leg part 141a extended to both sides at a certain interval from the rear of the body part within the first cavity of the cell, a latch part 143 extended from the front of the body part to the outside of the cell; a cylinder 110 located within the third cavity of the cell, having a body part 111 of a hollow, guides 113 and 115 extended to the first cavity of the cell after passing through a step between the first cavity and the second cavity along an axis direction from the body part 111, of which end is surrounded by the leg part 141a of the rotating latch within the first cavity of the cell, having slots 113 and 113b corresponding to the recesses lOOd and lOOe of the cell, and a key touch member coupled to the rear of the body part of the cylinder; a slider 120 of which parts forwarding and retracting along the guides 113 and 115 of the cylinder are extended to the outside through the slots 113a and 113b of the guides of the cylinder, the extended part being inserted into the recesses lOOd and lOOe of the cell when the slider is retracted; a slider driving means located within the cylinder, forwarding the slider; and a control means controlling the slider driving means.

[2] The lock device as claimed in claim 1, wherein the slider driving means includes a motor 135 located within the hollow of the body part 111 of the cylinder, a motor rotational axis 135a extended to the guides 113 and 115 of the cylinder, and a warm gear 137 coupled to the motor rotational axis.

[3] The lock device as claimed in claim 2, wherein the slider 120 includes an opening 125 at the center, through which the warm gear 137 passes, and a plate spring 123 of which one end is fixed to the body part of the slider and the other end is secured into a spiral valley of the warm gear 137 which passes through the opening.

[4] The lock device as claimed in claim 1, wherein the recesses lOOd and lOOe are formed up and down in the second cavity 100b of the cell, and the guides 113 and 115 of the cylinder have upper and lower slots 113a and 113b corresponding to the upper and lower receives lOOd and lOOe formed in the second cavity 100b of the cell.

[5] The lock device as claimed in claim 4, wherein the slider driving means includes a motor 135 located within the hollow of the body part 111 of the cylinder, a motor rotational axis 135a extended to the guides 113 and 115 of the cylinder, and a warm gear 137 coupled to the motor rotational axis.

[6] The lock device as claimed in claim 5, wherein the slider 120 includes upper and lower parts 121a and 121b extended through the upper and lower slots 113a and 113b of the guides, an opening 125 at the center, through which the warm gear 137 passes, and a plate spring 123 of which one end is fixed to the body part of the slider and the other end is secured into a spiral valley of the warm gear 137 which passes through the opening.

[7] The lock device as claimed in any one of claim 1 to claim 6, further comprising a coupling pin 173 coupling the rotating latch 140 to the cylinder 110 to prevent the rotating latch from running idle in a state that coupling between the cylinder and the rotating latch is released.

[8] The lock device as claimed in claim 1, wherein the control means controlling the slider driving means includes an electronic circuit device 155 supplying the power to the motor 135.