CN201098127Y - safety lancet - Google Patents

Abstract

A safety blood taking needle is provided, wherein a first spring and a second spring are respectively arranged at two ends of the inner part of a shell, the shell is provided with a nozzle outlet, a protective rod is arranged close to the nozzle outlet, a push switch is preset on the shell, a first sliding block and a second sliding block are arranged between the first spring and the second spring, one end of the second sliding block opposite to the nozzle opening is provided with a felting needle, the end surfaces of the first sliding block and the second sliding block opposite to each other axially extend to form a total of two pairs of sliding feet, the two pairs of sliding feet are radially embedded into a pair of sliding groove seats corresponding to the sliding feet arranged in the shell, the contact end surfaces of the two pairs of sliding feet are arranged into inclined surface end surfaces which are opposite to each other, the inclined surfaces are contacted and abutted tightly by the force applied by the first spring and the second spring, the first sliding block is provided with a buckling rod which is buckled with the press switch, the first spring is pre-pressed to contract, and the first sliding block and the second sliding block are in a potential accumulation shape. The utility model has the advantages of repeated bullet thorn prevention, mistaken touch prevention and convenient single-hand holding.

Description

safety lancet

technical field

The utility model relates to a safety blood collection needle, in particular to a safety blood collection needle which is used to puncture the skin to cause bleeding, and is convenient to use a test piece to stain blood without repeatedly puncturing.

Background technique

As shown in Figure 6, it is the earliest known safety blood collection needle 5, which is composed of a housing 51, a spring 52, a switch 53, a needle 54 and a push rod 55, the known safety blood collection needle -5 can't close needle automatically after use, must use push rod 55 with manpower mode, pushes this pricking needle 54 into initial position.

As shown in Figure 7, then the improved known safety blood collection needle 26 is made up of a housing 61, a pair of springs 62, a switch 63 and a needle 64, because the needle 64 is arranged on a pair of springs 62, so the needle can be retracted automatically, but the known safety lancet 2 6 protrudes from the housing 61 due to the switch 63, which easily causes the risk of being stabbed when the known safety lancet 2 6 is taken.

As shown in Figure 8, it is the "blood collection device" new patent of the Taiwan Patent Announcement No. 527912. Composed of a buffer body 73 and a puncture needle 74, when the known safety blood collection needle 37 is used, the housing 71 is pressed forward, and the envelope 711 sinks relative to the housing 71, so that the housing 71 does not Then buckle the needle 74 to cause the spring effect of the needle 74, and then use the elasticity of the buffer body 73 as a rebound force to achieve the effect of narrowing the needle.

Although the known safety lancet 3 7 has improved the disadvantage that the switch 63 of the known safety lancet 2 6 is easily accidentally touched, the known safety lancet 3 7 adopts the method of pressing the housing 71 forward, and the envelope 711 is With respect to the shell 71 sinking so that the puncture needle 74 is designed to sting, but the strength of each person's effort is not exactly the same. Now the user is a strong man to use this known safety blood collection needle 37, or because Excessive force will cause the envelope 711 to sink more relative to the housing 71, causing the spring 72 to exert more force on the needle 74, so that the needle 74 cannot reach the narrowing point and remains on the skin. The known safety blood collection needle 37 is pulled out from the skin by hand, which increases the pain of the examinee.

Utility model content

The main purpose of the utility model is to provide a safety blood collection needle that does not repeatedly puncture.

The secondary purpose of the utility model is to provide a safety blood collection needle with anti-mistouch function.

Another purpose of the present utility model is to provide a safety blood collection needle that can be easily identified whether it has been used or not.

Another purpose of the present utility model is to provide a safe blood collection needle that can be held firmly with one hand.

The utility model provides a safety blood collection needle. A first spring and a second spring are respectively arranged at both ends of a long cylindrical casing, and a spout is arranged at one end of the casing adjacent to the second spring, and A push switch is preset in the housing, and the feature is that a first sliding block and a second sliding block are arranged between the first spring and the second spring, and the end of the second sliding block opposite to the mouthpiece is A lancet is provided, and the opposite end faces of the first sliding block and the second sliding block axially extend a total of two pairs of sliding feet, and the two pairs of sliding feet are radially embedded in a pair of corresponding sliding groove seats provided inside the housing , and the contact end surfaces of the two pairs of sliding feet are set as opposite inclined surface end surfaces, due to the force exerted by the first spring and the second spring, each of the inclined surfaces is in contact with each other, and the first sliding block is set There is a buckle bar that is engaged with the push switch, so that the first spring is pre-compressed and contracted, so that the first sliding block and the second sliding block are ready to go; through the composition of the above components, when the push switch When the buckle bar is no longer engaged due to being pressed down by force, the first sliding block and the second sliding block will slide linearly inside the housing due to the force applied by the first spring, so that The puncture needle can be exposed to the mouth and pierce the skin. At this time, a pair of sliding feet of the second sliding block have left the chute seat. Because of the wedge principle between the inclined surfaces of each sliding foot, the second sliding block will The rebounding force exerted by the second spring promotes the second sliding block to be pushed into the inner space of the shell of the non-chute seat part by a rotation angle, so that the two pairs of sliding feet are staggered to achieve the safe blood collection. The needle will not repeat the safety effect of the sting.

The pair of chute seats can be 180 degrees to each other, and the pair of sliding feet of the first sliding block and the second sliding block are also the same; the entrance of the chute seat is provided with a bevel, allowing the second sliding block to As soon as it leaves the chute seat and rotates, it is immediately pushed into the non-chute seat space inside the housing smoothly;

In addition, the housing is composed of a main housing and a cover, wherein the main housing is a combination of a long cylinder and a rectangular cylinder, and a fastening portion is provided at one end of the cover, and The fastening portion is fastened in a pair of perforations provided on the main casing, the outlet is located at the other end of the cover, and is in a concave shape, and has an inner edge and an outer edge, and a protective The protective rod is connected with the inner edge, and the protective rod is provided with several ring grooves immediately adjacent to the joint;

The push switch is provided with a gap for fastening of the buckle rod, so the push switch is a part of the casing cut to form a pressing plate, so that the push switch does not protrude from the casing, that is, the push switch and the casing The body is on the same plane, so it has the function of preventing false touch.

It is known from the above description that the utility model can indeed achieve the following effects compared with the prior art:

1. The utility model provides a creative mechanism to ensure that the effect of the bullet will not be repeated, and a protective bar is provided in front of the mouth to ensure that it will not be stabbed in the natural state, so it is different from the known relative higher than security.

2. The utility model provides an anti-mistouch push switch structure, so when taking a safety blood collection needle, the push switch will not be accidentally touched; and the push switch does not need to be pressed too hard.

3. The utility model provides a structure that is easy to identify whether the safety blood collection needle has been used. Since there is a protective rod in front of the mouth, the protective rod must be pulled off before the skin can be stabbed. Without a protective rod, it is easy to identify that the safety lancet has been used.

4. The utility model provides an appearance of a safety blood collection needle that is convenient to hold with one hand, and the thumb and middle finger of the hand are pressed against the lower edge of the rectangular cylinder, so that the safety blood collection needle can be held firmly with one hand.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the utility model;

Fig. 2 is a combined sectional view of the utility model;

Fig. 2A is a cross-sectional view of the utility model;

Fig. 3 is a three-dimensional appearance view of the utility model;

Fig. 4 is a state diagram of the internal components of the slug actuation of the utility model;

Fig. 5 is a state diagram of internal components of the utility model after use;

Figure 5A is a cross-sectional view of the utility model after use;

Fig. 6 is the sectional view of known structure one;

Fig. 7 is the sectional view of known structure two;

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

Explanation of reference signs

A The utility model 1 Housing

11 Main shell 111 Long cylinder

112 rectangular tube 12 cover

121 Mouth outlet 122 Fastening part

123 inner edge 124 outer edge

125 Protection rod 126 Ring groove

13 pressure switch 131 notch

14 chute seat 141 slope

15 Perforation 21 First spring

22 second spring 3 first sliding block

31 Sliding foot 311 Inclined surface

32 buckle bar 321 small bump

33 flange 4 second sliding block

41 Sliding foot 411 Inclined surface

42 Flange 43 Needle

5 known structure one 51 shell

52 Spring 53 Switch

54 Needle 55 Pusher

6 Known Structure 2 61 Housing

62 Spring 63 Switch

64 Pricking Needle 7 Known Structure 3

71 Shell 711 Envelope

72 Spring 73 Buffer

74 Needles

Detailed ways

First, please refer to Figure 1-2A, the utility model A relates to a safety blood collection needle, which includes a housing 1, a first spring 21, a second spring 22, a first sliding block 3 and a second sliding block 4 ;in,

The housing 1 is composed of a main housing 11 and a cover 12. The main housing 11 is basically a combination of a long cylinder 111 and a rectangular cylinder 112. The middle position of the rectangular cylinder 112 is A push switch 13 is provided. The push switch 13 is a pressing plate formed by cutting a groove on the periphery of the housing 1. It is elastic in itself and does not have any protrusions on the housing 1. That is, the push switch and the housing The body is on the same plane, so as to facilitate the pressing of the fingertips, and has the function of preventing false touches. When the fingertips are released, it will return to the original position. The push switch 13 is further provided with a notch 131. A pair of chute seats 14 are provided, and the chute seats 14 extend axially from the top end of the inner wall to a position slightly higher than the notch 131. The shape of the pair of chute seats 14 is basically a square groove, and they are 180 degrees to each other; The cover 12 is an inverted cone hollow body, and is provided with a spout 121 at the bottom. The spout 121 is concave, and has an inner edge 123 and an outer edge 124. Link, the protective rod 125 is provided with several ring grooves 126 adjacent to the link; and a pair of fastening parts 122 are provided on both sides above it to be fastened with a pair of perforations 15 provided in the main housing 11 to form a safety blood collection needle The housing 1.

The first spring 21 and the second spring 22 are compression springs, respectively arranged at both ends of the inner space of the housing 1, and between the first spring 21 and the second spring 22, a first sliding block 3 is set. And the second sliding block 4, to provide the kinetic energy source for the first sliding block 3 and the second sliding block 4 to slide and rotate.

The first sliding block 3 is a round rod with 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 at the other end of the round rod, that is, a pair of sliding feet 31 axially extending on both sides of the end of the flange 33, and mutually forming 180 degrees, the pair of sliding feet 31 have a pair of opposite inclined surfaces 311 end faces; in addition A buckle bar 32 is provided at a predetermined position of the flange 33, and the buckle bar 32 extends radially for a short section from a quarter of the flange 33, then bends at 90 degrees and extends axially for a large section, And be provided with a small projection 321 at the end, therefore, this buckle bar 32 is an L shape as a whole, and its cross section is rectangular substantially, and itself has elasticity.

The second sliding block 4 is a round bar with a flange 42, a needle 43 is fixed at one end of the round bar, and the outer diameter of the round bar 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, a pair of sliding feet 41 are axially extended on both sides of the end of the flange 42, and are 180 degrees to each other. The pair of sliding feet 41 It has a pair of opposite inclined surfaces 411 end surfaces.

Please refer to Figures 1 and 2, when assembling the above-mentioned components, put the first spring 21 into the round rod of the first sliding block 3, and press against one end of the first spring 21 by the flange 33, Then align the sliding foot 31 of the first sliding block 3 with the chute seat 14 on the inner wall of the main housing 11. It should be noted that the buckle bar 32 is in the same direction as the push switch 13 on the main housing 11, so that the second A sliding block 3 is pushed into the main housing 11 to the small protrusion 321 on the buckle bar 32, and snapped into the notch 131 of the push switch 13; at this time, the first spring 21 is compressed and exerts a pre-force on the first sliding block 3 ;

In addition, the second sliding block 4, the second spring 22 and the cover 12 are loaded in order, wherein, the sliding foot 41 of the second sliding block 4 also slides into the chute seat 14 of the main housing 11, and the second One end of the spring 22 is inserted into the round rod of the second sliding block 4, and is pressed against the flange 42, so that the fastening portion 122 of the cover 12 is fastened with a pair of through holes 15 provided in the main housing 11, Therefore, the other end of the second spring 22 will be against the mouth opening 121 of the cover 12, and a slight force will be applied to close the second sliding block 4 and the first sliding block 3 together to achieve a safe blood collection needle. For the purpose of assembly, as shown in FIG. 2 , the slopes 311 , 411 of the sliding feet 31 , 41 of the first sliding block 3 and the second sliding block 4 are embedded in each other, and there is no gap between them.

Please refer to Figures 3 and 4. When using the safety blood collection needle, first place the thumb and middle finger of the hand against the two sides of the rectangular tube 112 of the main housing 11, so as to hold the safety blood collection needle firmly with one hand. , and then pull off the protective rod 125. At this time, the protective rod 125 will be broken from the inner edge 123 of the mouth 121, and then use the outer edge 124 of the mouth 121 to touch the skin of the human body, and press it with the middle finger. When the switch 13 is used, the small protrusion 321 on the button bar 32 of the first sliding block 3 will be forced to break away from the notch 131 of the push switch 13. At this time, the force applied to the first sliding block 3 by the first spring 21 will impel the first sliding block to 3 Linear sliding, by the way, drives the second sliding block 4, but the second spring 22 is compressed to generate a rebound force on the second sliding block 4, and the positive and negative forces generated by 21 and 22 between the two springs Next, the puncture needle 43 on the second sliding block 4 is exposed to the appropriate length of the mouth opening 121 to pierce the capillaries under the human skin, then the needle is automatically withdrawn and the safety blood collection needle is taken away, and the blood can be seen flowing in the On the skin, it is convenient for inspectors to take the test piece and get the blood.

Please refer to shown in Fig. 4, 5, when the pricking needle 43 of the second sliding block 4 stretches out appropriate length and pierce the skin, at this moment, the sliding foot 41 of the second sliding block 4 has left the chute seat 14, when there is no chute Under the action of the position limiting of seat 14 and the wedge between the slopes 311, 411 of each sliding foot 31, 41, the second sliding block 4 is urged to rotate, and the rebound force of the second spring 22 acts on the second sliding block. 4, when the second sliding block 4 is rotating, since the entrance of the chute seat 14 has an inclined surface 141, it just does not encounter any resistance, so that the second spring 22 pushes the second sliding block 4 further. Return its sliding feet 41 to the housing interior space of the non-chute seat 14, so that the two pairs of sliding feet 31, 41 are staggered (see Figure 5A), even if the push switch 13 is pressed again with fingertips , the needle 43 of the second sliding block 4 will always remain in the housing 1, so it will not cause repeated bullets and be easily identified as having been used (because there is no protective bar), and must be discarded after use A safety lancet.

To sum up, the utility model provides a safe blood collection function that does not repeatedly sting, does not touch the switch by mistake, is easy to be identified as having been used, and can be held firmly with one hand. Needle.

It should be noted that the above is the technical principle used in the specific implementation of the utility model. If changes are made according to the idea of the utility model, the functions produced by it still do not exceed the spirit covered by the specification and accompanying drawings. , all should be within the scope of the present utility model.

Claims (7)

1. The utility model provides a safe blood taking needle, is equipped with first spring, and second spring respectively in the inside both ends of a long cylindric casing, and the one end that this casing is close to the second spring is equipped with a nozzle mouth to predetermine a push switch in this casing, its characterized in that: the first spring and the second spring are provided with a first sliding block and a second sliding block, one end of the second sliding block opposite to the nozzle is provided with a puncture needle, the end surfaces of the first sliding block and the second sliding block opposite to each other axially extend to form a total two pairs of sliding feet, the two pairs of sliding feet are radially embedded into a pair of sliding groove seats corresponding to the sliding feet arranged in the shell, the contact end surfaces of the two pairs of sliding feet are arranged into inclined surface end surfaces which are opposite to each other, the inclined surfaces are contacted and tightly abutted with each other under the force of the first spring and the second spring, and the first sliding block is provided with a buckling rod to be buckled with the press switch.

2. A safety lancet according to claim 1, wherein: the pair of sliding groove seats are 180 degrees, and the pair of sliding feet of the first sliding block and the second sliding block are also the same.

3. A safety lancet according to claim 1 or 2, characterised in that: the entrance of the chute seat is provided with a bevel edge.

4. A safety lancet according to claim 3, wherein: the nozzle is located on the end face of the shell and is concave, and has an inner edge and an outer edge, a protective rod is arranged and connected with the inner edge, and a plurality of annular grooves are arranged at the position, close to the connection position, of the protective rod.

5. A safety lancet according to claim 4, wherein: the shell consists of a main shell and a sealing cover, wherein one end of the sealing cover is provided with a buckling part which is buckled in a pair of through holes arranged on the main shell, and the outlet is positioned at the other end of the sealing cover.

6. A safety lancet according to claim 5, wherein: the pressing switch is located on the same plane with the casing, and a pressing plate is formed by cutting a part of the casing, and has elasticity and a notch for buckling the buckling rod.

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

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