WO2009052710A1

WO2009052710A1 - Safety lancet

Info

Publication number: WO2009052710A1
Application number: PCT/CN2008/070282
Authority: WO
Inventors: Chiu-Yueh Huang
Original assignee: Chiu-Yueh Huang
Priority date: 2007-10-26
Filing date: 2008-02-04
Publication date: 2009-04-30
Also published as: CN201098127Y

Abstract

A safety lancet, wherein a first spring (21) and a second spring (22) are provided at two ends inside a housing (1) respectively, a protective rod is adjacent to an outlet (121) provided on the housing (1), and a press switch (13) is preset on the housing (1). A first slide block (3) and a second slide block (4) are arranged between the first spring (21) and the second spring (22), and a needle (43) is positioned on the end of the second slide block (4) opposite to the outlet (121). Two pairs of runners (31,41) extend axially from the opposite end faces of the first slide block (3) and the second slide block (4), and the two pairs of runners(31,41) are embedded in a pair of corresponding slide slots (14) within the housing (1). And the interfaces of the two pairs of slide runners (31,34) are configured as opposite inclined planes. The inclined planes (311,411) are brought into contact with each other closely under the force applied by the first spring (21) and the second spring (22). A snap rod (32) is further provided on the first slide block (3) and clasps to the press switch (13), such that the first spring (21) is preloaded to be compressed, thereby maintain the first slide block (3) and the second slide block (4) in an energy storage state.

Description

Safety lancet

Technical field

The invention relates to a safety blood collection needle, in particular to a safety blood collection needle for piercing the skin to cause bleeding, and convenient to use the test piece to take blood without repeated sling. Background technique

As shown in Fig. 6, it is the earliest known safe blood collection needle 5, which is composed of a casing 51, a spring 52, a switch 5 3, a needle 54 and a push rod 55. Needle 5 cannot be automatically retracted after use, and the lancet 54 must be pushed into the starting position by the pusher 55 in a manual manner.

As shown in Fig. 7, followed by a modified known safety lancet 2, is composed of a housing 61, a pair of springs 62, a switch 63 and a lancet 64, since the lancet 64 is disposed on a pair of springs. Between 62, the needle can be automatically retracted, but the known safety lancet 2 is likely to cause a risk of being stabbed when the known safety lancet 6 is taken because the switch 63 protrudes out of the housing 61.

As shown in Figure 8, the new patent for the "blood collection device" of Taiwan Patent Publication No. 527912 is a relatively advanced known safety blood collection needle 3, which is composed of a housing 71, a spring 72, and a sleeve 71 1 a buffer body 73 and a lancet 74. The known safety lancet 3 7 presses the housing 71 forward when in use, and the envelope 71 1 sinks relative to the housing 71, prompting the housing 71 The needle 74 is no longer buckled, causing the spur effect of the needle 74, and then the elasticity of the cushion body 7 is used as a rebound force to achieve the effect of the needle.

Although it is known that the safety lancet 3 has improved the disadvantage that the switch 63 of the known safety lancet 2 is easily mistyped, the known safety lance 3 is used to press the housing 71 forward, and the envelope 71 1 Then it is designed in such a manner that the housing 71 sinks to make the lancet 74 spurt, but the force of each person's output is not exactly the same. Now the user is a strong man to use the known safety lancet 3, or The envelope 71 1 will sink more than the housing 71 due to excessive force. Some, causing the spring 72 to exert more force on the lance 74, so that the lance 74 cannot reach the needle and remain on the skin, and the known safe lancet 3 must be manually removed from the skin by hand. Increase the pain of the test. Summary of the invention

The main object of the present invention is to provide a safe lancet that does not repeat slings.

A secondary object of the present invention is to provide a safety lancet that prevents accidental touch.

Still another object of the present invention is to provide a safe blood collection needle that is easily recognized for use.

Another object of the present invention is to provide a safety lancet that is easy to hold with one hand. The invention provides a safety lancet, wherein a first spring and a second spring are respectively disposed at two ends of a long cylindrical casing, and the casing is provided with an outlet mouth adjacent to one end of the second spring, and The housing is preset with a pressing switch, and is characterized in that: a first sliding block and a second sliding block are disposed between the first spring and the second spring, and the second sliding block is opposite to the outlet end of the outlet opening a pair of sliding legs, the two opposite pairs of sliding legs are radially embedded in a pair of sliding seats corresponding to the inside of the housing, and the opposite ends of the first sliding block and the second sliding block are axially extended. And the contact end faces of the two pairs of sliding legs are opposite to each other, and the inclined faces are in contact with each other by the biasing force of the first spring and the second spring, and the first sliding block is provided with a Engaging the buckle with the pressing switch, causing the first spring to be pre-stressed and contracted, so that the first sliding block and the second sliding block are in a state of being ready to be emitted; by the composition of the above-mentioned member, when the pressing switch is When the force is pressed so that the buckle is no longer engaged, a spring is applied to the first sliding block and the second sliding block such that it linearly slides inside the housing, so that the lancet is exposed to the mouth of the mouth to pierce the skin. At this time, the second sliding block A pair of sliding feet have left the sliding seat. Because of the wedge principle between the inclined faces of the sliding legs, the second sliding block is pushed by the rebounding force applied by the second spring to cause the second sliding block to be rotated. The internal space of the housing of the non-sliding seat portion is such that the two pairs of sliding legs are mutually staggered to achieve the safety effect that the safety lancet does not repeat the sling. The pair of sliding seats can be 180 degrees to each other, and the first sliding block and the pair of sliding legs of the second sliding block are also the same; the entrance of the sliding seat is provided with a beveled edge for the second sliding As soon as the block rotates away from the chute seat, it is smoothly pushed into the space of the non-sliding seat inside the casing;

In addition, the housing is composed of a main housing and a cover, wherein the main housing is formed by combining a long cylinder and a rectangular tube, and a fastening portion is arranged at one end of the cover. And the fastening portion is fastened in a pair of perforations provided in the main casing, the outlet opening is located at the other end of the cover, and is concave, and has an inner edge and an outer edge, and a a protective rod is coupled to the inner edge, and the guard rod is provided with a plurality of ring grooves adjacent to the joint;

The push switch is provided with a notch for the buckle to be fastened, so that the push switch is cut by a part of the casing to form a pressing plate, so that the push switch does not protrude from the casing, that is, the push switch and the shell The body is on the same plane and therefore has an anti-missing function.

According to the above description, the present invention can achieve the following effects compared with the prior art:

1. The present invention provides a creative mechanism to ensure that the effect of squeezing is not repeated, and a protective rod is provided in front of the mouth of the mouth to ensure that it is not spurted under natural conditions, and thus is compared with known ones. More secure.

2. The present invention provides an anti-missing push switch structure, so that when the safety lancet is taken, the push switch is not accidentally touched; and the push switch does not have the problem of excessive force.

3. The present invention provides a structure that can easily recognize the presence or absence of a safe blood collection needle. Since a protective rod is provided in front of the mouth of the mouth, the guard rod must be broken before use to spur the skin, if not The protective rod is easy to identify that the safety lancet has been used.

4. The present invention provides a safe lancet for easy grasping with one hand. The thumb and middle finger of the hand are placed against the lower edge of the rectangular tube, so that the safety lancet can be stably held by one hand. DRAWINGS

Figure 1 is an exploded perspective view of the present invention;

Figure 2 is a sectional view of the combination of the present invention; Figure 2A is a cross-sectional view of the cross section of the present invention;

Figure 3 is a perspective view of the present invention;

Figure 4 is a state diagram of the internal components of the spur action of the present invention

Figure 5 is a state diagram of internal components after use of the present invention;

Figure 5A is a cross-sectional view of the cross-sectional view of the present invention after use;

Figure 6 is a cross-sectional view of a known structure 1;

Figure 7 is a cross-sectional view of a known structure 2;

Figure 8 is a cross-sectional view of a known structure three.

Description of the reference numerals

A invention 1 housing

11 main housing 111 long cylinder

112 rectangular tube 12 cover

121 mouth mouth 122 buckle

123 inner edge 124 outer edge

125 protective rod 126 ring groove

13 push switch 131 notch

14 chute seat 141 bevel

15 perforated 21 first spring

22 second spring 3 first sliding block

31 slipper 311 bevel

32 buckles 321 small bumps

33 flange 4 second sliding block

41 slipper 411 bevel

42 flange 43 needle

5 Known structure 51 Housing

52 spring 53 switch 54 needle 55 push rod

6 known structures. 61 housing

62 spring 63 switch

64 needles known structures

71 housing envelope

72 spring buffer

74 needles

First, please refer to FIG. 1 - 2A, the present invention relates to a safety lancet, comprising a housing 1, a first spring 21, a second spring 22, a first sliding block 3 and a second sliding block 4; The housing 1 is composed of a main housing 11 and a cover 12, and the main housing 11 is basically formed by combining a long cylinder 111 shape and a rectangular tube 112. A pressing switch 13 is disposed at an intermediate position of the 112. The pressing switch 13 is a pressing plate formed by cutting a groove at the periphery of the casing 1. The roller is itself elastic and has no protrusions on the casing 1, that is, a push switch. It is on the same plane as the housing to facilitate the pressing of the finger tip, and has an anti-missing function. When the finger tip is released, the original position is restored. The push switch 13 is further provided with a notch 131, and the main housing. The inner wall of the 11 is provided with a pair of sliding seat 14 extending axially from the top end of the inner wall to a position slightly higher than the notch 131. The pair of sliding seats 14 are substantially square in shape and mutually 180 degrees; the cover 12 is an inverted cone hollow body at the bottom An outlet port 121 is defined. The outlet port 121 has a concave shape and has an inner edge 123 and an outer edge 124. A guard rod 125 is disposed to be coupled to the inner edge 123. The guard rod 125 is provided adjacent to the joint. The ring groove 126 is provided with a pair of fastening portions 122 on the upper sides thereof to be engaged with the pair of through holes 15 provided in the main casing 11 to form the casing 1 for the safety blood collection needle.

The first spring 21 and the second spring 22 are compression springs respectively disposed at two ends of the inner space of the casing 1, and a first sliding block is disposed between the first spring 21 and the second spring 22 3 and the second sliding block 4 to provide a source of kinetic energy for the sliding and rotating of the first sliding block 3 and the second sliding block 4.

The first sliding block 3 is a round rod having a flange 33, and the outer diameter of the round rod is slightly smaller than the inner diameter of the first spring 21, so that the first spring 21 can be easily inserted into the round rod to the flange 33. The other end of the round rod, that is, the two ends of the flange 33, axially extend a pair of sliding legs 31, and are 180 degrees apart from each other, the pair of sliding legs 31 have opposite ends of a pair of inclined surfaces 311; The flange 33 is provided with a buckle 32 at a predetermined position. The buckle 32 extends radially from the quarter of the flange 33 for a short period of time, and then is bent at 90 degrees to extend a large portion in the axial direction. A small bump 321 is provided at the end. Therefore, the buckle 32 is generally L-shaped, has a substantially rectangular cross section, and is elastic in itself.

The second sliding block 4 is a round rod having a flange 42. A lancet 43 is fixed at one end of the round rod, and the outer diameter of the round rod is slightly smaller than the inner diameter of the second spring 22, so that the second spring 22 The round rod can be easily inserted into the flange 42; the other end of the round rod, that is, the two sides of the end of the flange 42 respectively extend a pair of sliding legs 41 axially and 180 degrees to each other, the pair of sliding feet 41 There are a pair of inclined faces 411 end faces opposite to each other.

Referring to FIGS. 1 and 2, when the above components are assembled, the first spring 21 is first placed in the round bar of the first sliding block 3, and the flange 33 is pressed against one end of the first spring 21. The sliding leg 31 of the first sliding block 3 is aligned with the sliding seat 14 of the inner wall of the main casing 11. It should be noted that the pressing rod 32 is in the same direction as the pressing switch 13 on the main casing 11, so that the first A sliding block 3 pushes the small protrusion 321 of the main housing 11 to the buckle 32 to engage with the notch 131 of the push switch 13; at this time, the first spring 21 is compressed to apply the force to the first sliding block 3 ;

In addition, the second sliding block 4, the second spring 22 and the cover 12 are sequentially loaded, wherein the sliding legs 41 of the second sliding block 4 also slide into the sliding seat 14 of the main casing 11, second One end of the spring 22 is sleeved on the round rod of the second sliding block 4 and abuts against the flange 42 , and the engaging portion 122 of the cover 12 is engaged with the pair of through holes 15 provided in the main casing 11 . Therefore, the other end of the second spring 22 will abut against the mouth 121 of the cover 12, and apply a slight force to the second slide. The moving block 4 is in close proximity to the first sliding block 3 for the purpose of assembling the safety lancet. As shown in FIG. 2, the inclined surfaces 311 and 411 of the sliding blocks 31 and 41 of the first sliding block 3 and the second sliding block 4 are shown. Embed each other, resisting without gaps.

Referring to FIG. 3 and FIG. 4, when the safety lancet is used, the thumb and the middle finger of the hand are firstly pressed against the two sides of the rectangular tube 112 of the main casing 11, so that the safety lancet can be stably held by one hand. Then, the guard bar 125 is broken, and the guard bar 125 is broken off from the inner edge 123 of the mouth 121, and then the outer edge 124 of the mouth 121 is pressed against the skin of the human body, and the middle finger is pressed. When the switch 13 is pressed, the small bump 321 on the buckle 32 of the first sliding block 3 is forced out of the notch 131 of the pressing switch 13, and at this time, the force applied by the first spring 21 to the first sliding block 3 causes the first sliding block 3 linear slip, by the way, the second sliding block 4 is driven, but the second spring 22 is compressed by the repulsive force applied to the second sliding block 4, and the positive and negative forces generated by the two springs 21, 22 Next, the lancet 43 on the second sliding block 4 is exposed to the appropriate length of the mouth opening 121, and the micro blood vessels under the human skin are pierced, and then the needle is automatically withdrawn and the safety lancet is removed, and the blood flow can be seen. On the skin, it is convenient for the inspector to take the test piece and take the blood.

Referring to FIGS. 4 and 5, when the lancet 43 of the second sliding block 4 protrudes beyond the appropriate length to pierce the skin, at this time, the sliding foot 41 of the second sliding block 4 has left the chute seat 14 without the chute. The restriction of the seat 14 and the wedge between the inclined surfaces 311 and 411 of the sliding legs 31 and 41 cause the second sliding block 4 to rotate, and the second sliding block is applied to the second sliding block due to the rebounding force of the second spring 22 4, when the second sliding block 4 is in rotation, since the entrance of the sliding seat 14 has a slope 141, it does not encounter any resistance, so that the second spring 22 pushes the second sliding block 4 Returning the sliding foot 41 to the inner space of the housing of the non-sliding seat 14 so that the two pairs of sliding legs 31, 41 are staggered with each other (see FIG. 5A), even if the pressing switch 13 is pressed again with the tip of the finger The lancet 43 of the second sliding block 4 will always remain in the housing 1, so that it does not cause repeated slings and is easily recognized (because there is no protective rod), and must be discarded after use. A safe blood collection needle.

In summary, the present invention provides a switch that does not repeatedly spur, and does not accidentally touch the switch. A safe blood collection needle that can be easily viewed and used to hold the operation function with one hand. Changes in the spirit and scope of the present invention are intended to be within the scope of the present invention.

Claims

Rights request

A safety blood collection needle, wherein a first spring and a second spring are respectively disposed at two ends of a long cylindrical casing, and the casing is provided with an outlet mouth adjacent to one end of the second spring, and the casing is The body presets a push switch, and is characterized in that: a first sliding block and a second sliding block are disposed between the first spring and the second spring, and an end of the second sliding block opposite to the outlet opening is provided with a a pair of sliding legs, wherein the opposite ends of the first sliding block and the second sliding block extend axially in a pair of sliding legs, and the two pairs of sliding legs are radially embedded in a pair of sliding seats corresponding to the interior of the housing, and The contact end faces of the two pairs of sliding legs are opposite to each other, and the inclined faces of the first spring and the second spring are in contact with each other, and the first sliding block is provided with a buckle. Engage with the push switch.

2. The safety lancet according to claim 1, wherein: the pair of sliding seats are at 180 degrees to each other, and the pair of sliding legs of the first sliding block and the second sliding block are also the same.

3. The safety lancet according to claim 1 or 2, characterized in that: the bevel seat is provided with a beveled edge at the entrance.

4. The safety lancet according to claim 3, wherein the outlet opening is located at an end surface of the housing and is concave, and has an inner edge and an outer edge, and is provided with a protective rod and The inner edge is connected, and the guard bar is provided with a plurality of ring grooves adjacent to the joint.

The safety lancet according to claim 4, wherein the housing is composed of a main housing and a cover, and a fastening portion is disposed at one end of the cover, and the fastening portion is The buckle is located in a pair of perforations provided in the main casing, and the nozzle opening is located at the other end of the cover.

The safety lancet according to claim 5, wherein the pressing switch is in the same plane as the housing, and a part of the housing is cut to form a pressing plate, which has elasticity and is pressed The switch is provided with a notch for the buckle to be fastened.

7. The safety lancet according to claim 6, wherein the main casing is formed by combining a long cylinder and a rectangular cylinder.