CN213249113U

CN213249113U - Disposable tip blood sampling device

Info

Publication number: CN213249113U
Application number: CN202021822919.6U
Authority: CN
Inventors: 姜嵩; 张正才; 王万明; 关国丞
Original assignee: Beijing Target Technology Co ltd
Current assignee: Beijing Target Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-05-25
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a disposable tip blood sampling device, which comprises an outer sleeve, a needle head component and a return spring component; the lower panel of the lower end of the shell is provided with a needle outlet and a spring guide bulge, the upper panel is provided with a guide post, the inner wall of the shell is provided with a middle partition plate, the outer wall of the shell is provided with two elastic trigger pressing plates, and the shell is provided with a clamping groove and an observation window; the needle head assembly comprises a driving spring, a needle handle and a needle head, wherein elastic clamping blocks are arranged on two sides of the needle handle, and a guide hole is formed in the needle handle; the reset spring assembly comprises a reset spring and a spring pressing plate, a needle outlet hole is formed in the middle of the spring pressing plate, and four trigger rods are arranged around the needle outlet hole. The utility model discloses can stabilize the blood taking needle and pierce the degree of depth, improve and go out needle and withdraw of needle speed, disposable avoids cross infection.

Description

Disposable tip blood sampling device

Technical Field

The utility model relates to a medical instrument, in particular to a disposable tip blood sampling device.

Background

The peripheral blood sampling of the blood sampling station in China currently uses more than 90% of common injection type blood sampling needles, the blood sampling method has many defects, the needle stick injuries are the most common occupational injuries of blood station nurses, the edges of the blood sampling needles are irregular, the surfaces of the blood sampling needles are rough, skin is easy to tear, the pain is strong, the needle heads can be seen by blood donors due to the fact that the needles are exposed during blood sampling, mental stress is difficult to accept, many volunteers give up blood donation due to fear of pain, the needle feeding depth is difficult to master, and the bleeding amount is difficult to control.

Disclosure of Invention

The utility model aims at providing a disposable tip blood sampling device can stabilize the blood taking needle and pierce the degree of depth, improves needle and moves back needle speed, reduces the painful sense of patient when carrying out the fingertip blood sampling.

The utility model adopts the following technical proposal:

a single use tip blood collection device comprising: the needle comprises a shell, a needle head assembly and a return spring assembly;

the lower panel of the lower end of the shell is provided with a needle outlet and a spring guide bulge, the upper panel is provided with a guide post, the inner wall of the shell is provided with a middle partition plate, the outer wall of the shell is provided with two elastic trigger pressing plates, and the shell is provided with a clamping groove and an observation window;

the needle head assembly comprises a driving spring, a needle handle and a needle head, the needle head is welded on the needle handle, elastic clamping blocks are arranged on two sides of the needle handle and clamped in clamping grooves of the shell in a natural state, and the end parts of the elastic clamping blocks protrude out of the outer wall of the shell. The needle handle is internally provided with a guide hole which is matched with a guide post on the upper panel of the shell, so that the needle handle can move linearly along the guide post;

the reset spring assembly comprises a reset spring and a spring pressing plate, a needle outlet hole is formed in the middle of the spring pressing plate, four trigger rods are arranged around the needle outlet hole, the reset spring is in a compression state when the reset spring is in a standby state, and the trigger rods are fixed at the edge of the needle outlet hole of the middle partition plate due to the thrust action of the reset spring.

The utility model discloses utilize drive spring's elasticity to make the quick downstream of syringe needle, utilize the front end of syringe needle to puncture fingertip skin, accomplish the action back of puncturing skin when the syringe needle, the needle handle just in time reachs the trigger bar, because the thrust of needle handle and the effect of structure make the trigger bar no longer be fixed in the median septum and go out the pinhole edge, because reset spring's thrust drives spring clamp plate and trigger bar and promotes the needle handle and upwards retract, inside the syringe needle retraction shell. Because the elasticity of the return spring is much larger than that of the driving spring of the needle assembly, the needle cannot go out of the needle outlet of the shell again, and the aim of disposable use is fulfilled.

The shell wall is provided with an observation window, the position of the spring pressing plate can be seen from the observation window, when the spring pressing plate is arranged at the lower end of the observation window, the disposable terminal blood sampling device is in an unused state, and when the spring pressing plate is arranged at the upper end of the observation window, the disposable terminal blood sampling device is in a used or damaged state.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure 1, a shell 2, a needle assembly 3, a return spring assembly 11, an elastic trigger pressing plate 12, a guide column 13, a partition plate 14, a needle outlet 15, an observation window 16, a clamping groove 17, a spring guide bulge 18, a lower panel 19, an upper panel 21, a needle 22, a needle handle 23, an elastic clamping block 24, a guide hole 25, a return spring 31, a return spring 32, a spring pressing plate 33, a trigger rod 34, a needle outlet hole 33 and a trigger rod

Detailed Description

The invention is described in detail below with reference to the following figures and examples:

as shown in fig. 1, the utility model discloses a disposable tip blood sampling device, include: a housing 1, a needle assembly 2 and a return spring assembly 3.

Lower panel 18 of shell 1 lower extreme is equipped with out needle mouth 14 and spring direction arch 17, and top panel 19 is equipped with guide post 12, is equipped with median septum 13 on the shell 1 inner wall, is equipped with two elasticity on the shell 1 outer wall and triggers clamp plate 11, and it has draw-in groove 16 and observation window 15 to open on the shell 1.

The needle assembly 2 comprises a driving spring 25, a needle handle 26 and a needle 21, the needle 21 is welded on the needle handle 22, elastic clamping blocks 23 are arranged on two sides of the needle handle 22, the elastic clamping blocks 23 are clamped in the clamping grooves 16 of the shell 1 in a natural state, and the end parts of the elastic clamping blocks 23 protrude out of the shell 1 to be opened and closed. The needle handle 22 is provided with a guide hole 24 inside to match with the guide post 12 of the upper panel 19 of the shell 1, so that the needle handle 22 can move linearly along the guide post 12.

Reset spring subassembly 3 includes reset spring 31 and spring pressure plate 32, has a pinhole 34 in the middle of the spring pressure plate 32, has four trigger bars 33 around the pinhole 34, treats under the user state, and the reset spring 31 that is located between spring guide bulge 17 and the shell 1 inner wall is in compression state, and trigger bar 33 is because under reset spring 31's thrust effect, and the card is at the median septum 13 pinhole edge.

The utility model discloses when using, observe observation window 15 on the shell 1 wall earlier, can see the position that spring clamp plate 32 located from observation window 15, be in the observation window lower extreme when spring clamp plate 32, then this disposable tip blood sampling device is in the state that is not used, but normal use, be in the observation window upper end when spring clamp plate 32, then this disposable tip blood sampling device is in the state of using or damaging.

When confirming the utility model discloses can normally use the back, disinfect to patient's fingertip, and press the shell lower extreme in patient's fingertip blood sampling department, afterwards, medical personnel press the elasticity trigger pressing plate 11 of shell 1 both sides, make the outside end of elasticity fixture block 23 retrieve to the shell in 1, cancellation draw-in groove 16 is to the limiting displacement of elasticity fixture block 23, under drive spring 25's effect, needle handle 22 drives syringe needle 21 quick downstream, puncture patient's fingertip skin in the twinkling of an eye, needle handle 22 is pushed in the median septum 13 this moment and is contacted with the trigger bar 33 on the spring clamp plate 32, make trigger bar 33 no longer block at median septum 13 outlet hole edge, because reset spring 31's effect drives spring clamp plate 32 and trigger bar 33 and promotes needle handle 22 upward movement. The needle 21 is retracted into the housing 1, and since the spring force of the return spring 31 is much greater than the spring force of the drive spring 25 in the needle assembly 2, the needle 21 will not be able to exit the needle outlet 14 again for single use, preventing cross-contamination, and the spring press plate 32 will be observed to be at the upper end of the observation window.

Claims

1. A disposable tip blood collection device characterized by: comprises a shell, a needle assembly and a return spring assembly; the lower panel of the lower end of the shell is provided with a needle outlet and a spring guide bulge, the upper panel is provided with a guide post, the inner wall of the shell is provided with a middle partition plate, the outer wall of the shell is provided with two elastic trigger pressing plates, and the shell is provided with a clamping groove and an observation window; the needle head assembly comprises a driving spring, a needle handle and a needle head, elastic clamping blocks are arranged on two sides of the needle handle, and when an elastic trigger pressing plate on the shell presses the elastic clamping blocks to enable the elastic clamping blocks to be separated from the clamping grooves, the driving spring drives the needle handle to move downwards; the needle handle is internally provided with a guide hole which is matched with the guide post of the upper panel, so that the needle handle can move linearly along the guide post; when the needle handle moves downwards, the return spring assembly is triggered, the return spring assembly drives the needle assembly to return to the initial position, and the needle is retracted into the shell along with the needle handle.

2. The single use tip lancing device according to claim 1, wherein: in the ready to use state, the drive spring in the needle assembly is in a compressed state and the needle is located inside the housing.

3. The disposable tip lancing device according to claim 1, wherein the return spring assembly comprises a return spring and a spring plate, the spring plate has four trigger rods, the return spring is in a compressed state in the ready-to-use state, and the trigger rods are fixed to the edge of the needle outlet hole of the middle partition plate by the pushing force of the spring.

4. The disposable tip blood sampling device of claim 3, wherein the middle partition is fixed on the inner wall of the housing, and has a needle outlet hole in the middle, when the elastic trigger pressing plates on the two sides of the housing are pressed, the needle handle moves downward, when the needle handle is pushed into the middle partition, the needle handle contacts with the trigger rod on the elastic pressing plate, so that the trigger rod is no longer fixed on the middle partition, the spring pressing plate and the trigger rod are driven by the reset spring to push the needle handle to move upward, so that the needle retracts into the housing, because the elastic force of the reset spring is much greater than the elastic force of the driving spring in the needle assembly, the needle cannot exit from the needle outlet of the housing again, and the disposable purpose is achieved.

5. The disposable tip lancing device according to claim 1, wherein a viewing window is provided in the housing wall, the position of the spring biased tab being visible through the viewing window, the disposable tip lancing device being in an unused state when the spring biased tab is positioned at the lower end of the viewing window; when the spring pressing plate is positioned at the upper end of the observation window, the certain using tip blood sampling device is in a used or damaged state.