CN212939705U - Blood taking needle capable of preventing secondary acupuncture - Google Patents

Abstract

The utility model belongs to the technical field of medical equipment, a prevent blood taking needle of secondary acupuncture is disclosed, including the needle tube seat, set up the needle tubing in the needle tube seat front end, connect the handle seat in the needle tube seat rear end, the movable sleeve is established the sliding sleeve on the needle tube seat and the needle tubing sheath of cover on the needle tubing, make the sliding sleeve move relative to the needle tube seat through the slide mechanism between sliding sleeve and the needle tube seat, the slide mechanism includes spout and slider, the slider matches in the spout, and the slider moves along the orbit direction of spout head end to end in the spout; the track of the sliding chute is a smooth curve formed by sequentially connecting at least two line segments, and an included angle gamma is formed between every two adjacent line segments; the sliding sleeve is provided with a spring plate assembly, and the front part and the rear part of the needle tube seat are respectively provided with a front clamping device and a rear clamping device which are matched with the spring plate assembly. The utility model discloses can avoid remaining the outer drop of blood, pollution, improve medical safety, reduce personal safety hidden danger.

Description

Blood taking needle capable of preventing secondary acupuncture

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to prevent blood taking needle of secondary acupuncture.

Background

The blood taking needle is an instrument for collecting blood samples in the process of medical examination, belongs to disposable articles, and generally comprises an input needle seat, a blood taking needle head, an output needle seat and a hose, wherein the blood taking needle head is arranged on the input needle seat, the output needle seat is communicated with the input needle seat through the hose, and in addition, the output needle seat is connected with a blood collecting tube. This kind of blood taking needle, after the blood taking needle pricks the patient and the blood sampling is accomplished and extracts, does not handle the blood taking needle, and the blood taking needle exposes outside, if handle improperly, very easily appears the blood taking needle and pricks the people for the secondary, has certain potential safety hazard.

Chinese patent publication No. CN 107811644 a discloses a blood taking needle, including a needle tube seat, a needle tube, the needle tube further comprises a base, sliding mechanism and a needle tube sheath, the first end and the needle tube connection of needle tube seat, the second end and the base of needle tube seat are connected, the needle tube sheath assembles on the first end of needle tube seat, and contact with sliding mechanism's first end, sliding mechanism's second end and base swing joint, the needle tube seat cover is established in sliding mechanism's cavity, the size of sliding mechanism's second end is less than the size of the first end of needle tube seat, sliding mechanism can slide for the needle tube seat, the first end of needle tube seat is equipped with the draw-in groove, sliding mechanism's second end is equipped with the card protruding, when sliding mechanism slides to the position that sliding mechanism's second end and needle tube seat's first end contacted, the card protruding card is gone into in the draw-in groove. The blood taking needle of above-mentioned structure, slide mechanism can wrap up the needle tubing, has prevented effectively that the condition of blood taking needle secondary wounding people from taking place, however, its structure still has following defect: 1. after the blood is collected and drawn out of the human body vein, a small amount of human body blood is possibly attached to the needle tube, the needle tube is only wrapped in the sliding mechanism from the periphery of the needle tube, and the blood on the needle tube possibly drips out to cause pollution; 2. the sliding mechanism is not smooth enough to push and clamp.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art, and provides the blood taking needle which can avoid residual blood from dripping outwards and prevent blood pollution from occurring and prevents secondary acupuncture.

The utility model discloses a blood taking needle capable of preventing secondary acupuncture, including a needle tube seat, a needle tube arranged at the front end of the needle tube seat, a handle seat connected at the rear end of the needle tube seat, a sliding sleeve movably sleeved on the needle tube seat and a needle tube sheath sleeved on the needle tube, wherein the sliding sleeve is enabled to move relative to the needle tube seat through a sliding mechanism between the sliding sleeve and the needle tube seat, the sliding mechanism comprises a sliding chute and a sliding block, the sliding block is matched in the sliding chute, and the sliding block moves along the track direction from the head end to the tail end of the sliding chute; the track of the sliding chute is a smooth curve formed by sequentially connecting at least two line segments, and an included angle gamma is formed between every two adjacent line segments; the sliding sleeve is provided with a spring plate assembly, the front part and the rear part of the needle tube seat are respectively provided with a front clamping device and a rear clamping device which are matched with the spring plate assembly, and when the spring plate assembly of the sliding sleeve is matched with the rear clamping device, the whole sliding sleeve is positioned on the needle tube seat; when the elastic sheet assembly of the sliding sleeve is matched with the front clamping device, the sliding sleeve is matched with and wraps the needle tube, an included angle is formed between the axis of the sliding sleeve and the axis of the needle tube, and the front end of the needle tube is matched and propped against the blood storage groove in the inner wall of the sliding sleeve; the sliding grooves are symmetrically arranged on two side walls of the needle tube seat and comprise a straight section groove and an inclined section groove which are sequentially connected, the straight section groove and the inclined section groove are in transition connection through an arc groove, the straight section groove is close to the rear end of the needle tube seat, the linear track of the straight section groove is parallel to the axis of the sliding groove, and the inclined section groove is close to the front end of the needle tube seat; the slider sets up the rear portion at the sliding sleeve inner wall, and the extending direction of slider is for being parallel with the axis of sliding sleeve.

Preferably, a plurality of blood draining strips are arranged in the blood storage groove and are arranged side by side along the radial direction; the extending direction of the blood draining strip is consistent with the axial direction of the sliding sleeve; further preferably, the cross-sectional shape of the blood draining strip is an inverted V-shape.

Preferably, the elastic sheet assembly comprises a clamping plate and an elastic sheet, the clamping plate and the elastic sheet are both positioned in an opening hole at the bottom of the sliding sleeve, gaps are formed between the left side and the right side of the clamping plate and between the inner wall of the opening hole and the inner wall of the opening hole, the front end of the clamping plate is connected with the inner wall of the opening hole, the rear end of the elastic sheet is connected with the inner wall of the opening hole, and a space is formed between the rear end of the clamping plate and the front end of the elastic sheet, so that the elastic sheet has upward and downward elastic deformation force by taking the rear end as a fulcrum, and the clamping; the inner side of the front part of the elastic sheet is provided with a convex block which is arched upwards. Wherein, the axis of the snap-gauge, the elastic sheet and the axis of the sliding sleeve are parallel to each other. Further preferably, the clamping plate and the elastic sheet are integrally arranged in the opening hole.

Preferably, the rear clamping device is a clamping groove arranged at the rear part of the needle tube seat, and the clamping groove is matched with the convex block at the front part of the elastic sheet. Before use and in the blood sampling process, the convex block of the elastic sheet on the sliding sleeve is clamped in the clamping groove of the needle tube seat in a matching manner, so that the sliding sleeve is limited to move back and forth.

Preferably, preceding latch device is the outside bellied fixture block of setting in the needle tubing seat front portion, and the front end of fixture block matches with the rear end of cardboard. After the fixture block is crossed to the cardboard rear end, the cardboard can receive the spacing of fixture block and block to unable realization reverse movement resets, has restricted the removal of sliding sleeve promptly, ensures that the needle tubing front end is located the blood storage groove of sliding sleeve, has avoided the reutilization, also can effectively prevent secondary acupuncture. Preferably, the rear end of the clamping block and the bottom surface of the needle tube seat form an included angle groove, and the front end of the elastic sheet abuts against the included angle groove. Further preferably, an included angle between a plane where the end face of the front end of the clamping block is located and a plane where the two inclined section grooves are connected is alpha, an included angle between a plane where the end face of the rear end of the clamping plate is located and a plane where the two inclined section grooves are connected is beta, and alpha is larger than beta.

Preferably, the bottom surface of the needle holder is aligned with the track of the slide groove along the axial direction.

Preferably, a chamfer surface is arranged between the bottom surface and the front end of the sliding sleeve; and the top surface of the sliding sleeve is provided with an anti-skid groove.

The utility model discloses in provide two kinds of structural style of sliding sleeve:

the first structural form is as follows: the sliding sleeve is integrally cylindrical, a certain assembly gap needs to be reserved between the seat body of the handle seat and the needle tube seat, and the lower part of the sliding sleeve is sleeved in the assembly gap reserved between the seat body and the needle tube seat. The concrete structure is as follows: the handle seat comprises a seat body and a handle arranged on one side of the seat body, and a first opening is formed in the side wall of the seat body; when the elastic sheet component of the sliding sleeve is matched with the rear clamping device, the lower part of the sliding sleeve is assembled in a gap between the base body and the needle tube base, and the first opening corresponds to the opening hole at the rear part of the sliding sleeve.

The second structure form is as follows: the sliding sleeve is only cylindrical on the upper part, and is semi-open on the lower part, the seat body of the handle seat is just positioned in the open part of the lower part of the sliding sleeve, and the lower part of the sliding sleeve and the seat body jointly form a cylinder to realize assembly. The concrete structure is as follows: the handle seat comprises a seat body and a handle arranged on one side of the seat body, a second opening is formed in the side wall of the seat body, and the upper end of the second opening is open; a third opening is formed in the side wall of the lower part of the sliding sleeve, and the lower end of the third opening is opened; a guide chute is arranged on the side wall of the needle tube seat corresponding to the sliding block on the sliding sleeve and is communicated with the chute, and the sliding block on the sliding sleeve slides into the chute through the guide chute to realize the assembly of the sliding sleeve and the needle tube seat; when the elastic sheet assembly of the sliding sleeve is matched with the rear clamping device, the lower part of the sliding sleeve is positioned in the second opening, the seat body of the handle seat is positioned in the third opening, and the second opening corresponds to the opening hole at the rear part of the sliding sleeve.

During the actual production, the handle seat and the needle tube seat of the utility model can be directly formed into an integral structure by adopting an integral forming process.

Compared with the prior art, the utility model beneficial effect who has is:

1. the blood taking needle for preventing the secondary acupuncture of the utility model has compact integral structure and beautiful and elegant appearance;

2. the utility model discloses a prevent blood taking needle of secondary acupuncture, be equipped with in the sliding sleeve and deposit the blood inslot, move forward along the orbit of spout and finally when targetting in place at the relative needle tubing seat of sliding sleeve, the needle tubing just is in depositing the blood inslot, and the front end of needle tubing and the first contact point of depositing the blood groove are the preceding lateral wall of depositing the blood groove, along with the continuous antedisplacement of sliding sleeve, the front end of needle tubing is depositing the blood groove in the direction of preceding lateral wall towards the back lateral wall and is drawn a segment distance, the best stop position is in the middle part of depositing the blood groove, and in this process, deposit the interior a plurality of cross-sections of blood groove and be the drop blood strip of "V" type, can be fine drop the residual blood of needle tubing front end on it, avoid blood to concentrate on a point and lead to the condition emergence of flowing back;

3. the utility model discloses a blood taking needle of preventing secondary acupuncture, open on the pedestal lateral wall of handle seat has the opening, is convenient for the assembly of whole blood taking needle, also is convenient for observe the joint between back latch fitting and the shell fragment and whether target in place, avoids the maloperation;

4. the utility model discloses a prevent blood taking needle of secondary acupuncture, the spout adopts the multistage formula structure to make the sliding sleeve realize that the diversion removes, and successfully make the needle tubing front end just with deposit the blood groove contact.

To sum up, prevent blood taking needle of secondary acupuncture, can avoid remaining dripping, the pollution of blood, improve medical safety, reduce personal safety hidden danger.

Drawings

Fig. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of the first embodiment (not including the blood collection tube and the blood collection tube puncture needle);

FIG. 3 is a sectional view showing the configuration of the axial position in an unused state (excluding the blood collection tube and the blood collection tube puncture needle) according to the first embodiment;

FIG. 4 is a sectional view showing the position of the slide mechanism in an unused state (excluding the blood collection tube and the blood collection tube puncture needle) according to the first embodiment;

FIG. 5 is a sectional view showing the axial position after use (excluding the blood collection tube and the blood collection tube puncture needle) in accordance with the first embodiment;

FIG. 6 is a sectional view showing the configuration of the slide mechanism after use (excluding the blood collection tube and the blood collection tube puncture needle) in accordance with the first embodiment;

FIG. 7 is a perspective view of a sliding sleeve according to one embodiment;

FIG. 8 is a sectional view of the blood reservoir of the sliding sleeve according to the first embodiment;

FIG. 9 is a plan view of the needle hub of the first embodiment;

fig. 10 is a perspective view of a second embodiment of the present invention;

FIG. 11 is a perspective view of the sliding sleeve of the second embodiment;

FIG. 12 is a side view of the sliding sleeve of the second embodiment;

FIG. 13 is a perspective view of a handle holder according to a second embodiment;

FIG. 14 is a perspective view of the needle hub of the second embodiment;

FIG. 15 is a second perspective view of the needle hub of the second embodiment;

FIG. 16 is a perspective view of the handle holder, needle hub and sliding sleeve of the second embodiment;

FIG. 17 is a sectional view showing the configuration of the axial position in an unused state in the second embodiment (without including the blood collecting catheter and the blood collecting tube puncture needle)

Fig. 18 is a sectional view showing the axial position after use according to the second embodiment (excluding the blood collection catheter and the blood collection tube puncture needle).

In the figure: 1. a needle tube base; 2. a needle tube; 3. a handle seat; 4. a sliding sleeve; 5. a needle tube sheath; 6. a blood collection catheter; 7. a blood collection tube puncture needle; 8. a chute; 9. a slider; 10. a spring plate assembly; 11. a blood storage tank; 12. draining blood; 13. a straight groove; 14. a straight section groove; 15. an oblique section groove; 16. an arc groove; 17. clamping a plate; 18. a spring plate; 19. an open pore; 20. spacing; 21. a bump; 22. A card slot; 23. a clamping block; 24. an included angle groove; 25. chamfering; 26. a base body; 27. a handle; 28. a first opening; 29. an anti-slip groove; 30. a third opening; 31. a second opening; 32. an assembly hole; 33. assembling the column; 34. a guide chute.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

the first embodiment is as follows:

referring to fig. 1 to 9, the blood taking needle for preventing secondary acupuncture in this embodiment includes a needle tube seat 1, a needle tube 2 disposed at the front end of the needle tube seat 1, a handle seat 3 connected to the rear end of the needle tube seat 1, a sliding sleeve 4 movably sleeved on the needle tube seat 1, and a needle tube sheath 5 sleeved on the needle tube 2, the needle tube seat 1 is connected to a blood taking tube puncture needle 7 through a blood taking catheter 6, the sliding sleeve 4 moves relative to the needle tube seat 1 through a sliding mechanism between the sliding sleeve 4 and the needle tube seat 1, the sliding mechanism includes a sliding chute 8 and a sliding block 9, the sliding block 9 is embedded in the sliding chute 8 in a matching manner, and the sliding block 9 moves in the sliding chute 8 along a track direction from; the track of the sliding chute 8 is a smooth curve formed by sequentially connecting at least two line segments a, and an included angle gamma is formed between every two adjacent line segments a; the sliding sleeve 4 is provided with a spring plate component 10, the front part and the rear part of the needle tube seat 1 are respectively provided with a front clamping device and a rear clamping device which are matched with the spring plate component 10, and when the spring plate component 10 of the sliding sleeve 4 is matched with the rear clamping device, the whole sliding sleeve 4 is positioned on the needle tube seat 1; when the elastic sheet component 10 of the sliding sleeve 4 is matched with the front clamping device, the sliding sleeve 4 is matched with and wraps the needle tube 2, an included angle is formed between the axis of the sliding sleeve 4 and the axis of the needle tube 2, and the front end of the needle tube 2 is matched and propped against the blood storage groove 11 on the inner wall of the sliding sleeve 4.

A plurality of blood draining strips 12 with inverted V-shaped cross sections are arranged in the blood storage groove 11, and the plurality of blood draining strips 12 are arranged side by side along the radial direction; the extension direction of the blood draining strip 12 is consistent with the axial direction of the sliding sleeve 4. A straight groove 13 with a V-shaped section is formed between the adjacent blood draining strips 12, which is beneficial to the embedding of the front end of the needle tube 2 and the clamping of the front end of the needle tube 2.

The sliding grooves 8 are symmetrically arranged on two side walls of the needle tube seat 1 and comprise a straight section groove 14 and an inclined section groove 15 which are sequentially connected, the straight section groove 14 and the inclined section groove 15 are in transitional connection through an arc groove 16, the straight section groove 14 is close to the rear end of the needle tube seat 1, the linear track of the straight section groove 14 is parallel to the axis of the sliding grooves 8, and the inclined section groove 15 is close to the front end of the needle tube seat 1; the slider 9 sets up the rear portion at sliding sleeve 4 inner wall, and slider 9 matches in spout 8, and the extending direction of slider 9 is for being parallel with the axis of sliding sleeve 4.

In addition, the sliding groove 8 can be arranged on the inner wall of the sliding sleeve 4, and the sliding block 9 is arranged on two side walls of the needle tube seat 1, such reverse design needs to make the straight section groove 14 of the sliding groove 8 close to the front part of the inner wall of the sliding sleeve 4, the inclined section groove 15 close to the rear part of the inner wall of the sliding sleeve 4, and the sliding block 9 is arranged on the front part of two side walls of the needle tube seat 1.

The elastic sheet assembly 10 comprises a clamping plate 17 and an elastic sheet 18, the clamping plate 17 and the elastic sheet 18 are both positioned in an opening hole 19 at the bottom of the sliding sleeve 4, gaps are respectively arranged between the left side and the right side of the clamping plate 17 and between the left side and the right side of the elastic sheet 18 and the inner wall of the opening hole 19, the front end of the clamping plate 17 is connected with the inner wall of the opening hole 19, the rear end of the elastic sheet 18 is connected with the inner wall of the opening hole 19, and a space 20 is arranged between the rear end of the clamping plate 17 and the front end of the elastic sheet 18, so that the elastic sheet 18 has upward and downward elastic deformation force by taking the rear end as a fulcrum, and the; the front inner side of the spring plate 18 has an upwardly arched projection 21.

The clamping plate 17 and the elastic sheet 18 are parallel to the axis of the sliding sleeve 4.

The clamping plate 17 and the elastic sheet 18 are integrally positioned in the opening hole 19.

The rear clamping device is a clamping groove 22 arranged at the rear part of the needle tube seat 1, and the clamping groove 22 is matched with the convex block 21 at the front part of the elastic sheet 18. Before use and in the blood sampling process, the convex block 21 of the elastic sheet 18 on the sliding sleeve 4 is matched and clamped in the clamping groove 22 of the needle tube seat 1, so that the sliding sleeve 4 is limited to move back and forth.

The front clamping device is a clamping block 23 which is arranged at the front part of the needle tube seat 1 and protrudes outwards, and the front end of the clamping block 23 is matched with the rear end of the clamping plate 17. After fixture block 23 is crossed to cardboard 17 rear end, cardboard 17 can receive fixture block 23 spacing to unable reverse movement that realizes resets, has restricted sliding sleeve 4's removal promptly, ensures that 2 front ends of needle tubing are located sliding sleeve 4's the groove 11 of depositing blood, has avoided the reutilization, also can effectively prevent the secondary acupuncture.

The rear end of the fixture block 23 and the bottom surface of the needle tube seat 1 form an included angle groove 24, and the front end of the elastic sheet 18 is abutted in the included angle groove 24.

The included angle between the plane where the end face of the front end of the clamping block 23 is located and the plane where the two inclined section grooves 15 are connected is alpha, the included angle between the plane where the end face of the rear end of the clamping plate 17 is located and the plane where the two inclined section grooves 15 are connected is beta, and alpha is larger than beta. The included angle between α and β is the data measured when the sliding sleeve 4 slides forward to the limit position along the sliding groove 8 relative to the needle tube base 1, and the rear end of the clamping plate 17 passes over the clamping block 23 and is located at the front side of the front end of the clamping block 23.

The track of the bottom surface of the needle tube holder 1 along the axial direction is consistent with the track of the chute 8.

A chamfer surface 25 is arranged between the bottom surface and the front end of the sliding sleeve 4; and the top surface of the sliding sleeve 4 is provided with an anti-slip groove 29. The design of chamfer face 25 is favorable to when taking a blood sample to the patient, and whole blood taking needle can be fine lean on patient's skin position, and stability when being favorable to the puncture reduces patient's misery.

The sliding sleeve 4 in this embodiment is integrally cylindrical, and at this time, a certain assembly gap needs to be left between the seat body 26 of the handle seat 3 and the needle tube seat 1, and the lower portion of the sliding sleeve 4 is sleeved in the assembly gap left between the seat body 26 and the needle tube seat 1. The concrete structure is as follows: the handle seat 3 comprises a seat body 26 and a handle 27 arranged on one side of the seat body 26, the handle seat 3 is fixedly assembled with the needle tube seat 1, and a first opening 28 is formed on the side wall of the seat body 26; when the projection 21 of the elastic sheet 18 of the sliding sleeve 4 is matched with the slot 22 of the needle tube holder 1, the lower part of the sliding sleeve 4 is assembled in the assembly gap left between the holder body 26 and the needle tube holder 1, and the first opening 28 corresponds to the opening hole 19 at the rear part of the sliding sleeve 4. The operation of the lancet for preventing secondary puncture according to the present embodiment will be explained as follows:

before the blood taking needle for preventing secondary acupuncture is used, the sliding sleeve 4 is integrally sleeved on the needle tube seat 1, and the convex block 21 of the elastic sheet 18 is matched and clamped in the clamping groove 22 at the rear part of the needle tube seat 1, so that the sliding sleeve 4 is limited to move back and forth.

When in use, the needle tube sheath 5 is firstly pulled out, the forefinger and the thumb pinch the handle 27 of the handle seat 3, and then the chamfer surface 25 of the sliding sleeve 4 is leaned against the arm of a patient, so that the needle tube 2 forms a corresponding angle with the skin of the patient, and the patient is more comfortable during puncture; then, the needle tube 2 is punctured into the vein of the patient to take blood sampling for the patient, after the blood sampling is finished, one hand presses the sliding sleeve 4, the other hand pulls the handle seat 3 backwards along the axial direction, the handle seat 3 is connected with the needle tube seat 1, so the needle tube 2 is pulled out of the vein of the patient, in the process, the sliding sleeve 4 is still, the needle tube seat 1 moves backwards relative to the sliding sleeve 4, the moving track of the needle tube seat 1 is consistent with the track of the sliding chute 8, the straight section groove 14 of the sliding chute 8 corresponds to the needle tube seat 1 and moves backwards along the axial straight line relative to the sliding sleeve 4, the circular arc groove 16 enables the needle tube seat 1 to smoothly form an included angle relative to the sliding sleeve 4 without vibration and blocking, so as to enable the front end of the needle tube 2 to smoothly enter the blood storage groove 11 for preparation, along with the continuous backward movement of the needle tube seat 1, the inclined section groove 15 enables the needle tube seat 1 to form an included angle, receive fixture block 23's extrusion when cardboard 17, until all after crossing fixture block 23, then needle tube seat 1 removes to target in place, at this moment, the rear end of cardboard 17 is in the front side of fixture block 23, receives fixture block 23's effect, and the unable reverse movement of cardboard 17 resets to make the relative spout 8 of needle tube seat 1 unable to reset, avoid the reutilization, and the front end of needle tubing 2 reachs smoothly and deposits blood groove 11, thereby accomplish the safe storage to remaining blood, avoid causing the pollution.

The structure for preventing secondary acupuncture in the embodiment can be also suitable for vein needles, infusion needles, indwelling needles and the like, and can achieve the same effect as the embodiment.

Example two:

referring to fig. 10 to 18, the structure and the working principle process of the lancet for preventing secondary acupuncture in this embodiment are similar to those of the first embodiment, except for the assembling form of the sliding sleeve 4 and the handle holder 3. In the embodiment, only the upper part of the sliding sleeve 4 is cylindrical, the lower part of the sliding sleeve is semi-open, the seat body 26 of the handle seat 3 is just positioned in the open part of the lower part of the sliding sleeve 4, and the lower part of the sliding sleeve 4 and the seat body 26 form a cylinder together to realize assembly. The concrete structure is as follows: the handle seat 3 comprises a seat body 26 and a handle 27 arranged on one side of the seat body 26, wherein a second opening 31 is formed in the side wall of the seat body 26, and the upper end of the second opening 31 is open; the side wall of the lower part of the sliding sleeve 4 is provided with a third opening 30, and the lower end of the third opening 30 is opened; a guide chute 34 is arranged on the side wall of the needle tube seat 1 corresponding to the sliding block 9 on the sliding sleeve 4, the guide chute 34 is communicated with the chute 8, and the sliding block 9 on the sliding sleeve 4 slides into the chute 8 through the guide chute 34 to realize the assembly of the sliding sleeve 4 and the needle tube seat 1; when the projection 21 on the elastic sheet 18 of the sliding sleeve 4 is matched with the slot 22 of the needle tube seat 1, the lower part of the sliding sleeve 4 is located in the second opening 31, the seat body 26 of the handle seat 3 is located in the third opening 30, and the second opening 31 corresponds to the opening hole 19 at the rear part of the sliding sleeve 4. In this embodiment, the mounting hole 32 is provided in the seat body 26 of the handle seat 3, the mounting post 33 is provided on the side corresponding to the needle hub 1, and the mounting post 33 is mounted in the mounting hole 32, thereby fixedly connecting the needle hub 1 and the handle seat 3.

The blood taking needle for preventing secondary acupuncture provided by the embodiment of the utility model is described in detail, and the principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the technical scheme disclosed by the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. The utility model provides a prevent blood taking needle of secondary acupuncture, including needle tube seat (1), needle tubing (2) of setting at needle tube seat (1) front end, connect handle seat (3) at needle tube seat (1) rear end, the slip sleeve (4) and the needle tubing sheath (5) of establishing on needle tubing (2) are established to the activity cover on needle tube seat (1), make slip sleeve (4) remove its characterized in that relative needle tube seat (1) through slide mechanism between slip sleeve (4) and needle tube seat (1): the sliding mechanism comprises a sliding chute (8) and a sliding block (9), the sliding block (9) is matched in the sliding chute (8), and the sliding block (9) can move in the sliding chute (8) along the track direction from the head end to the tail end of the sliding chute (8); the needle tube is characterized in that the sliding sleeve (4) is provided with a shrapnel assembly (10), the front part and the rear part of the needle tube seat (1) are respectively provided with a front clamping device and a rear clamping device which are matched with the shrapnel assembly (10), and when the shrapnel assembly (10) of the sliding sleeve (4) is matched with the rear clamping device, the sliding sleeve (4) is integrally positioned on the needle tube seat (1); when the elastic sheet component (10) of the sliding sleeve (4) is matched with the front clamping device, the sliding sleeve (4) is matched and wraps the needle tube (2), an included angle is formed between the axis of the sliding sleeve (4) and the axis of the needle tube (2), and the front end of the needle tube (2) is matched and propped against the blood storage groove (11) in the inner wall of the sliding sleeve (4); the sliding grooves (8) are symmetrically arranged on two side walls of the needle tube seat (1) and comprise straight section grooves (14) and inclined section grooves (15) which are sequentially connected, the straight section grooves (14) and the inclined section grooves (15) are in transitional connection through arc grooves (16), the straight section grooves (14) are close to the rear end of the needle tube seat (1), the linear track of the straight section grooves (14) is parallel to the axis of the sliding grooves (8), and the inclined section grooves (15) are close to the front end of the needle tube seat (1); the sliding block (9) is arranged at the rear part of the inner wall of the sliding sleeve (4), and the extending direction of the sliding block (9) is parallel to the axis of the sliding sleeve (4).

2. The secondary needlestick-resistant blood lancet of claim 1, in which: a plurality of blood draining strips (12) are arranged in the blood storage groove (11), and the plurality of blood draining strips (12) are arranged side by side along the radial direction and are adjacent to each other left and right; the extending direction of the blood draining strip (12) is consistent with the axial direction of the sliding sleeve (4).

3. The lancet of claim 2, wherein: the cross section of the blood draining strip (12) is in an inverted V shape.

4. The secondary needlestick-resistant blood lancet of claim 1, in which: the elastic sheet assembly (10) comprises a clamping plate (17) and an elastic sheet (18), the clamping plate (17) and the elastic sheet (18) are both positioned in an opening hole (19) in one side of the rear part of the sliding sleeve (4), gaps are formed between the left side and the right side of the clamping plate (17) and the inner wall of the opening hole (19), the front end of the clamping plate (17) is connected with the inner wall of the opening hole (19), the rear end of the elastic sheet (18) is connected with the inner wall of the opening hole (19), and a space (20) is formed between the rear end of the clamping plate (17) and the front end of the elastic sheet (18), so that the elastic sheet (18) has upward and downward elastic deformation force by taking the rear end as a fulcrum, and the clamping plate (17) has upward and downward elastic deformation force by taking the front; the front inner side of the elastic sheet (18) is provided with a convex block (21) which is arched upwards.

5. The secondary needlestick-resistant blood lancet of claim 4, in which: the rear clamping device is a clamping groove (22) arranged at the rear part of the needle tube seat (1), and the clamping groove (22) is matched with a convex block (21) at the front part of the elastic sheet (18).

6. The secondary needlestick-resistant blood lancet of claim 4, in which: preceding latch device is outside bellied fixture block (23) for setting up in syringe seat (1) front portion, and the front end of fixture block (23) matches with the rear end of cardboard (17).

7. The secondary needlestick-resistant blood lancet of claim 6, in which: the rear end of the clamping block (23) and the bottom surface of the needle tube seat (1) form an included angle groove (24), and the front end of the elastic sheet (18) is propped in the included angle groove (24).

8. The secondary needlestick-resistant blood lancet of claim 6, in which: the included angle between the plane where the end face of the front end of the clamping block (23) is located and the plane where the two inclined section grooves (15) are connected is alpha, the included angle between the plane where the end face of the rear end of the clamping plate (17) is located and the plane where the two inclined section grooves (15) are connected is beta, and alpha is larger than beta.

9. The lancet for preventing secondary puncture according to any one of claims 1 to 8, wherein: the handle seat (3) comprises a seat body (26) and a handle (27) arranged on one side of the seat body (26), and a first opening (28) is formed in the side wall of the seat body (26); when the elastic sheet component (10) of the sliding sleeve (4) is matched with the rear clamping device, the lower part of the sliding sleeve (4) is assembled in an assembly gap reserved between the base body (26) and the needle tube seat (1), and the first opening (28) corresponds to the opening hole (19) at the rear part of the sliding sleeve (4).

10. The lancet for preventing secondary puncture according to any one of claims 1 to 8, wherein: the handle seat (3) comprises a seat body (26) and a handle (27) arranged on one side of the seat body (26), a second opening (31) is formed in the side wall of the seat body (26), and the upper end of the second opening (31) is open; a third opening (30) is formed in the side wall of the lower part of the sliding sleeve (4), and the lower end of the third opening (30) is opened; a guide chute (34) is formed in the side wall of the needle tube seat (1) corresponding to the sliding block (9) on the sliding sleeve (4), the guide chute (34) is communicated with the sliding chute (8), and the sliding block (9) on the sliding sleeve (4) slides into the sliding chute (8) through the guide chute (34) to realize the assembly of the sliding sleeve (4) and the needle tube seat (1); when the elastic sheet component (10) of the sliding sleeve (4) is matched with the rear clamping device, the lower part of the sliding sleeve (4) is positioned in the second opening (31), the seat body (26) of the handle seat (3) is positioned in the third opening (30), and the second opening (31) corresponds to the opening hole (19) in the rear part of the sliding sleeve (4).

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