WO2020000128A1

WO2020000128A1 - Press-type blood collection device

Info

Publication number: WO2020000128A1
Application number: PCT/CN2018/092595
Authority: WO
Inventors: 陈亮
Original assignee: 陈亮
Priority date: 2018-06-25
Filing date: 2018-06-25
Publication date: 2020-01-02

Abstract

A press-type blood collection device, pertaining to the field of medical auxiliary equipment. Before the blood collection device is launched, a push component (2) is held at two limiting protrusions (101) provided at inner side walls of a housing (1) by means of two curved elastic claws (201). Two limiting sliders (3011) of a fixing base (301) in a needle ejector (3) respectively abut against projections at bottom open ends of two slide recesses (203) provided at inner side walls of the push component (2). A needle tip of a blood collection needle (302) is located in the push component (2). After the blood collection device is launched, the push component (2) is held at two positioning protrusions (102) at the inner side wall of the housing (1) by means of the two curved elastic claws (201), the two limiting sliders (3011) are respectively located in the two slide recesses (203), and the needle tip of the blood collection needle (302) protrudes from a needle tip aperture (202). The blood collection device can prevent patients from seeing a needle tip during blood collection and becoming anxious, and can effectively prevent cross infection, and is easy to use, simple in structure, and safe and reliable.

Description

[Corrected 23.07.2018 according to Rule 26] A kind of pressure blood collection device

Technical field

The invention relates to the field of medical auxiliary equipment, in particular to a press-type blood collection device.

Background technique

At present, medical institutions generally use a blood collection needle to collect blood directly during routine blood collection. Although this method can be used for one person and one needle and is not cross-infected, the patient directly sees the needle and develops fear (especially for children). In the other type of blood collection, the blood collection needle is used in conjunction with the blood collection pen, and the blood collection needle is installed in the blood collection pen. After the needle is fired, the blood collection needle is removed, and another blood collection needle is installed and used again. It is extremely easy to cause cross infection. For the above two blood collection methods, medical staff directly contact the blood collection needle, and manually insert the needle during blood collection. It is easy to puncture if accidentally caused, causing cross-infection, there are certain hidden dangers, and there are other methods. At present, the more advanced blood collection The needle is retracted, and the needle automatically retracts into the housing after blood collection. However, the current type of retractable blood collection needle usually uses a cap, which is capped on the section of the blood collection needle. After use, the blood collection tube can be covered. Cross-infection may also be caused during use. The applicant applied for a utility model patent with the patent number 2013202790706 on May 21, 2013, and has been authorized to solve the above problems. However, in the actual use of the patented product, the structure of the patented product It is more complicated, the equipment steps and processes are more complicated, and the needle body ejector will have needle body deviation during the ejection process, and even the problem of needle body jamming.

Summary of the invention

Objective of the invention: In view of the problems existing in the prior art, the present invention provides a push-type blood collection device, which prevents patients from seeing needles during blood collection, prevents fear, and effectively avoids cross infection. It is simple to use, simple in structure, safe and reliable.

Technical solution: The present invention provides a push-type blood sampler, which includes a housing, a hair pusher, and a needle ejector. The inner wall of the housing is provided with two limiting bosses and two positioning bosses symmetrically on the left and right sides. , The two positioning bosses are respectively located on the lower side of the two limiting bosses; the pusher is located in the housing, and two pushers are symmetrically arranged on the left and right sides of the bottom of the outer sidewall A cylindrical structure with a curved elastic claw and a needle exit on the top of the blood collection needle; the needle ejector is composed of a fixing base and the blood collection needle, and the bottom end of the fixing base is fixed to the bottom of the housing by a spring The tail of the blood collection needle is fixed at the center axis position of the fixing base, and the needle extends to the top of the fixing base and directly faces the outlet of the needle; before the blood sampling device is launched, the pusher passes through two The arc-shaped elastic claw is clamped on two of the limiting bosses, the fixing seat is limited between the bottom end of the pusher and the spring, and the needle of the blood collection needle is located at Inside the pusher; after the blood sampler is fired, the pusher The two arc-shaped elastic claws are stuck on the two positioning bosses, the fixing seat is located in the pusher, and the needle of the blood collection needle protrudes from the needle outlet; after the puncture is finished, The needle of the blood collection needle is located in the pusher.

Further, two slide slots with bottom openings are symmetrically provided on the front and back sides of the inner wall of the hair pusher, and two limit slides that cooperate with the two slide slots are symmetrically provided on the front and back sides of the outer wall of the fixing seat. Block, before the blood sampler launches, the two limit sliders abut on the bosses at the bottom open ends of the two chute, respectively; during the puncture process of the blood sampler after launch, the two limit sliders Respectively located in two said chute.

Further, the push-type blood sampling device further includes a torsion bar, and two limiting shoulders are symmetrically arranged on both sides of the middle portion of the torsion bar. When the blood sampling device is in a transport state, the bottom end of the torsion bar is fixed to the fixed portion. The top end of the seat is connected with a breakpoint, the limiting shoulder is located inside the pusher and abuts on the lower surface of the needle outlet. When the blood sampling device is in a firing state, the torsion bar is separated from the blood sampling device. There is a certain distance between the limit shoulder of the torsion bar and the bottom end of the torsion bar. This distance can always clamp the two curved elastic claws of the pusher on the two limit bosses on the inner side wall of the housing, that is, When it is kept in the transport state, the pusher cannot be pressed, so as to ensure that the needle ejector is always limited between the bottom open ends of the two slide grooves of the pusher and the spring, which effectively prevents the needle ejector from being transported. It is ejected in the state, which effectively prevents the cross-infection caused by the needle of the blood collection needle being ejected from the ejector's needle exit when in the transport state.

Further, two left and right sides of the inner wall of the housing are symmetrically and vertically provided with two guide grooves that cooperate with the arc-shaped elastic claws, and the guide grooves are connected directly above the limiting boss. When the pusher is installed in the housing, the existence of the guide groove enables the two arc-surface elastic claws to be smoothly locked to the two limiting bosses through the guiding effect of the two guide grooves, respectively, and the installation is convenient.

Further, two limiting shoulders are provided symmetrically on the left and right sides of the outer side wall of the fixing seat, the two limiting shoulders are located above the two limiting sliders, and the two limiting The plane on which the shoulder collapses and the plane on which the two limiting sliders are located are perpendicular to each other. During the ejection process of the fixed base, the ejection path is likely to be non-linear, which will cause the lancet to deviate and affect the effect of needle sticking. Therefore, in the present invention, above the two limit sliders on the outer side wall of the fixed base and two Two limit slides are symmetrically arranged in the plane where the limit slides are perpendicular to each other, so that the upper and lower parts of the fixed seat are limited in position. During the process of the fixed seat being ejected, due to the limit collapse and the limit The double limit effect of the position slider, the ejection path of the fixed seat is a straight line, so that the ejection path of the blood collection needle is also a straight line, which ensures the accuracy of the position of the needle and the effect of the needle.

Preferably, a plane on which the two chutes are located and a plane on which the two arc-surface elastic claws are located are perpendicular to each other. This design is also to ensure that the overall structure of the pusher is symmetrical, and to ensure that the ejection path of the needle ejector is linear as much as possible.

Working principle and beneficial effect: In the present invention, before the blood sampling device is launched, the needle ejector is limited between the bottom open ends of the two slide grooves of the pusher and the spring. At this time, the needle ejector is fixed in the needle ejector. The two limit sliders on the outer wall of the seat abut against the bottom open ends of the two slide grooves, and the plane where the two limit slides are located is at an angle with the plane where the two slide grooves are located, so the needle ejector can be The limit is between the bottom open ends of the two chutes of the hair ejector and the spring, and the needle of the blood ejection needle of the needle ejector is located inside the hair ejector; when blood puncture is required, the hair ejector has a needle outlet One end is aligned with the skin of the needle to be punctured and is pressed toward the skin after contacting the skin. During the pressing process, the two curved elastic claws of the pusher are moved from the two limiting bosses to the two positioning bosses. During the movement, the part where the two arc-shaped elastic claws of the pusher contact the inner side wall of the casing has a curved structure, and there is a misalignment relationship between the positioning boss and the limiting boss. Therefore, the pusher is in During the movement, it will rotate an angle to limit The positioning boss moves to the positioning boss and is positioned by the positioning boss. During the rotation process, the two slide grooves on the pusher will also rotate by an angle, and this rotation angle will just place the above two limit sliders. The plane is rotated to the same plane as the plane where the two chutes are located, and the fixed seat is under the action of the spring. Quick ejection in the exit direction. When the two limit sliders move to the top of the two chute and are stopped by the chute shoulders, the movement stops. At this time, the lancet on the fixed seat is also ejected to the outside of the needle exit to realize the alignment. The purpose of puncture of the skin outside the needle exit; after the puncture is over, the fixing base will quickly spring back to a distance under the spring's resilience to bring the blood collection needle outside the needle exit during the puncture back to the hair. Device inside.

It can be seen that before the blood sampling device of the present invention is fired, the blood sampling needle is always located inside the pusher, which effectively prevents medical personnel or other people from contacting the needle and causing cross infection; during the puncture process after the blood sampling device is launched, when the needle of the blood sampling needle is ejected After exiting the needle exit of the pusher, the skin is punctured quickly. After the puncture is completed, the needle of the blood collection needle can be quickly springed back into the pusher by the spring. The patient cannot see the entire puncture process and after the puncture is completed. Blood collection needles can effectively prevent the fear of patients (especially children), and the blood collection devices after use will not puncture the collector's hands because the blood collection needles are exposed to the outside, otherwise they will cross-infect; when the blood collection, only the medical staff will need to push The end of the hair device with the needle exit is affixed to the skin and then pressed to achieve needle sticking, which is very convenient to operate; in addition, the blood sampler has a simple structure, is safe and reliable.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is an overall cross-sectional view of a push-type blood sampler before launch in Embodiment 1;

FIG. 2 is an overall sectional view of the push-type blood collection device before launching in the first embodiment; FIG.

3 is an overall cross-sectional view of the push-type blood sampler in a puncture state after launch according to Embodiment 1;

4 is an overall cross-sectional view of the push-type blood sampler in a puncture state after launch according to Embodiment 1;

5 is an overall cross-sectional view of the push-type blood sampler after the puncture after launch is completed in Embodiment 1;

FIG. 6 is an overall cross-sectional view of the push-type blood sampler after the puncture after the launch is performed in Embodiment 1; FIG.

7 is a schematic view of a three-dimensional structure of the housing;

8 is a perspective cross-sectional view of a housing;

FIG. 9 is a schematic diagram of the three-dimensional structure of the pusher;

10 is a schematic diagram of the three-dimensional structure of the pusher;

11 is a schematic perspective view of a needle body ejector;

FIG. 12 is an overall cross-sectional view of a push-type blood sampler before launch in Embodiment 2; FIG.

FIG. 13 is an overall cross-sectional view of the push-type blood collection device before launching in the second embodiment.

detailed description

The present invention is described in detail below with reference to the drawings.

Embodiment 1:

This embodiment provides a push-type blood collection device, as shown in FIGS. 1 and 2. The blood collection device is mainly composed of a housing 1, a pusher 2 and a needle ejector 3. The pusher 2 is located in the housing 1, and the blood collection device is in the Before launch, the needle ejector 3 is located below the ejector 2 and inside the housing 1 (as shown in Figures 1 and 2). The puncture state of the blood sampler after launch (as shown in Figures 3 and 4) and after the puncture is complete (as shown in Figures 5 and 5) 6), the needle ejector 3 is located inside the pusher 2; as shown in Figs. 7 and 8, two guide grooves 103 on the left and right sides of the inner side wall of the housing 1 are arranged symmetrically and vertically to facilitate the installation of the pusher 2; A limiting boss 101 is provided directly below the guide groove 103, and a positioning boss 102 is staggered under the two limiting bosses 101, two limiting bosses 101 are symmetrically arranged, and two positioning bosses 102 are symmetrically arranged. Also set symmetrically; as shown in Figures 9 and 10, the pusher 2 is a cylindrical structure, the top of which is a semi-closed end with a needle outlet 202, and the left and right sides of the bottom end wall are symmetrically provided with two guide grooves 103 to cooperate with the two guide grooves 103. The arc-shaped elastic claw 201 is provided with two chute openings 103 at the bottom and two chute openings symmetrically on the front and back sides of the inner wall of the pusher 2. The plane where 103 is located is perpendicular to the plane where the two curved elastic claws 201 are located. As shown in FIG. 11, the needle ejector 3 is composed of a fixing base 301 and a blood collection needle 302. The two limiting slides 3011 cooperated with the above two chute 103, two limiting shoulders 3012 are symmetrically arranged on the left and right sides of the outer side wall of the fixing seat 301 above the limiting slide 3011, and the two limiting shoulders 3012 are located The plane is perpendicular to the plane on which the two limiting sliders 3011 are located. The blood collection needle 302 is fixed at the center axis position of the fixing base 301, and the needle tail is located inside the fixing base 301. The needle extends out of the fixing base 301, and the bottom of the fixing base 301. The end is elastically connected to the bottom end of the inner wall of the casing 1 through a spring 4.

Before the blood sampling device is launched, as shown in Figures 1 and 2, the two curved elastic claws 201 of the pusher 2 are clamped on the two limiting bosses 101, and the fixing base 301 of the needle ejector 3 is limited in the pushing position. Between the bottom open ends of the two slide grooves 203 of the hair dryer 2 and the spring 4, the two limit sliders 3011 abut against the bottom open end bosses of the two slide grooves 203, respectively. At this time, the two limit slides There is an angle between the plane where 3011 is located and the plane where the two chutes 203 are located. The needle of the blood collection needle 302 is located in the pusher 2; during the puncture process after the blood collector is launched, as shown in Figures 3 and 4, the two Two curved elastic claws 201 are clamped on the two positioning bosses 102, and the two limit slides 3011 of the fixed seat 301 in the needle ejector 3 are respectively located in the two sliding grooves 203. At this time, the two limit slides The plane where the block 3011 is located is the same as the plane where the two slide grooves 203 are located, and the two limit sliders 3011 are blocked by the shoulders on the top of the two slide grooves 203. The blood collection needle 302 on the fixed seat 301 is also ejected to the needle. The outside of the outlet 202 is used to puncture the skin on the outside of the needle outlet 202. After the puncture is completed, as shown in Figs. 5 and 6, the needle of the blood collection needle 302 is located on the pusher.器 2 内。 In the device 2.

The working principle of the push-type blood sampler is as follows: When a blood collection puncture is required, the end of the pusher 2 with the needle outlet 202 is aligned with the skin to be punctured and pressed against the skin after contacting the skin. During the pressing process, the pusher The two arc-shaped elastic claws 201 of 2 are respectively moved from the two limiting bosses 101 to the two positioning bosses 102. During the movement process, since the distance between the limiting boss 101 and the positioning boss 102 is Dislocation relationship, and the part where the two curved elastic claws 201 contact the inner side wall of the casing 1 is a curved surface structure, so the pusher 2 will rotate with the curved surface structure of the curved elastic claw 201 during the movement Only one angle can make its two curved elastic claws 201 move from the two limiting bosses 101 to the two positioning platforms 1022 and are limited. During the rotation process, the two sliding grooves on the inner side wall of the pusher 2 203 also rotates with an angle. This angle of rotation just rotates the plane on which the two limit sliders 3011 on the fixed base 301 and the plane on which the two sliding grooves 203 are located to the same plane. Because there is no bottom opening of the sliding groove 203 End squeezing action, plus fixed seat 301 With the spring force of the bottom spring 4, the two limit sliders 3011 are bounced into the two sliding grooves 203 and rapidly ejected along the sliding groove 203 toward the needle outlet 202 of the pusher 2. The blood collection needle on the fixed seat 301 302 also quickly ejects to the outside of the needle exit 202 to achieve the purpose of ligating the skin on the outside of the needle exit 202. After the puncture is completed, the fixing base 301 will quickly bounce back towards the spring 4 for a distance under the spring force of the spring 4. The needle of the blood collection needle 302 outside the needle outlet 202 during puncture is brought back to the inside of the pusher 2 again.

Embodiment 2:

This embodiment is a further improvement of Embodiment 1. The main improvement is that in Embodiment 1, if you want to use a blood collection device to launch a blood collection needle, you only need to press the hair extension device 2 gently. When the pusher 2 is pressed by mistake, the lancet 302 is fired. The lancet 302 is ready to be fired at any time, and is easily cross-infected and unsafe. In this embodiment, the above defects can be solved. , Specifically:

As shown in FIGS. 12 and 13, the blood sampling device in this embodiment further includes a torsion bar 5 provided with two limiting shoulders 501 symmetrically on both sides of the middle, and the blood sampling device is in a transport state (or as described in Embodiment 1). (The state of the blood sampler before the launch), the bottom end of the torsion bar 5 is connected to the top of the fixing base 301 in a break-point manner, and the free end of the torsion bar 5 passes through the needle outlet 202 at the top of the pusher 2 and is exposed to the push. Outside the housing 2 and the housing 1, two limiting shoulders 501 are located inside the hair pusher 2, and the upper surfaces of the two limiting shoulders 501 abut against the lower surface of the needle exit 202 at the top of the hair pusher 2, that is, When the blood collection device is not required to be launched, the torsion bar 5 can limit the two curved elastic claws 201 of the pusher 2 to the two limit projections in the housing 1 through its two limit shoulders 501. The table 101 cannot be moved; when the blood collection device needs to be launched, pinch the free end of the torsion bar 5 to rotate, break the break-point connection between the torsion bar 5 and the top of the fixed seat 301, and place the two limiting shoulders 501. After the plane is rotated to be parallel to the needle outlet 202, the torsion bar 5 is pulled out of the pusher 2. At this time, the torsion bar 5 is separated from the blood collection device, and then Gently press the hair pusher 2 so that the two curved elastic claws 201 of the hair pusher 2 can move from the two limiting bosses 101 to the positioning bosses 102 to realize the launching of the needle body launcher 3. The launching process It is completely the same as that in Embodiment 1, and will not be repeated here.

This embodiment is exactly the same as Embodiment 1 except that one torsion bar 5 is added, and details are not described herein.

The above embodiments are only for explaining the technical concept and features of the present invention, and the purpose thereof is to enable those familiar with the technology to understand the contents of the present invention and implement them accordingly, but not to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention shall be covered by the protection scope of the present invention.

Claims

A push-type blood sampler is characterized by comprising a casing (1), a pusher (2) and a needle ejector (3). Two limits are symmetrically provided on the left and right sides of the bottom of the inner wall of the casing (1). Positioning boss (101) and two positioning bosses (102), the two positioning bosses (102) are respectively located on the lower side of the two limiting bosses (101); the pusher ( 2) The pusher (2) is located in the casing (1), and two arc-shaped elastic claws (201) are symmetrically arranged on the left and right sides of the bottom of the outer side wall, and the needle exit of the blood collection needle (302) is provided on the top ( 202) cylindrical structure; the needle ejector (3) is composed of a fixed seat (301) and the blood collection needle (302), and the bottom end of the fixed seat (301) is fixed to the place by a spring (4) The bottom of the casing (1); the tail of the blood collection needle (302) is fixed at the center axis position of the fixing base (301), and the needle extends to the top of the fixing base (301) and faces the needle Exit (202);

Before the blood sampling device is launched, the pusher (2) is clamped on the two limiting bosses (101) by the two curved elastic claws (201), and the fixing base (301) is The limit is between the bottom end of the pusher (2) and the spring (4), the needle of the blood collection needle (302) is located in the pusher (2); the blood collection device punctures after launching In the process, the pusher (2) is clamped on the two positioning projections (102) by the two curved elastic claws (201), and the fixing seat (301) is located on the pusher. In the device (2), the needle of the blood collection needle (302) protrudes from the needle outlet (202); after the puncture is completed, the needle of the blood collection needle (302) is located in the pusher (2).
The push-type blood sampler according to claim 1, characterized in that the inner wall of the pusher (2) is provided with two bottom opening chute (203) symmetrically on the front and back sides, and the fixing seat (301) Two limiting sliders (3011) that cooperate with the two chute (203) are arranged symmetrically on the front and back sides of the outer side wall of the outer wall. Before the blood sampler is launched, the two limiting sliders (3011) abut each other. The bottom open ends of the two slide grooves (203) are on the bosses; during the puncture process of the blood sampler, the two limit slides (3011) are respectively located in the two slide grooves (203).
The push-type blood sampler according to claim 1, further comprising a torsion bar (5), and two limit shoulders (501) are symmetrically arranged on both sides of the middle portion of the torsion bar (5), In the transport state, the bottom end of the torsion bar (5) is connected to the top break point of the fixed seat (301), and the limit shoulder (501) is located inside the pusher (2) and abuts On the lower surface of the needle outlet (202), when the blood sampling device is in a firing state, the torsion bar (5) is separated from the blood sampling device.
The push-type blood sampler according to claim 1, wherein two left and right sides of the inner wall of the casing (1) are symmetrically and vertically provided with two guide grooves that cooperate with the curved elastic claws (201). (103), the guide groove (103) is connected directly above the limiting boss (101).
The push-type blood sampler according to any one of claims 2 to 4, characterized in that two left and right limiting shoulders (3012) are symmetrically provided on the left and right sides of the outer side wall of the fixing seat (301), The limit shoulders (3012) are located above the two limit sliders (3011), and the plane where the two limit shoulders (3012) are located and the two limit sliders (3011) ) The planes are perpendicular to each other.
The push-type blood sampler according to any one of claims 1 to 4, wherein a plane on which the two chute grooves (203) are located and a plane on which the two arc-shaped elastic claws (201) are located are perpendicular to each other .