CN209899405U

CN209899405U - Blood taking needle

Info

Publication number: CN209899405U
Application number: CN201920605882.2U
Authority: CN
Inventors: 刘春燕
Original assignee: Chengdu Shangjin Nanfu Hospital
Current assignee: Chengdu Shangjin Nanfu Hospital
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-01-07
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a blood taking needle, which relates to the field of municipal medical supplies and provides a blood taking needle with a protective sleeve capable of automatically sleeving a needle head. The blood taking needle comprises a needle tube hard end and a needle head connected to the front end of the needle tube hard end; the device also comprises an end socket outer sleeve, a protective sleeve and an elastic piece; the end sleeve is sleeved outside the needle tube hard end, the rear end of the end sleeve is connected with the needle tube hard end, an annular hole is formed between the end sleeve and the needle tube hard end, a guide long groove is formed in the end sleeve and comprises a main guide groove arranged in the front-back direction and a rear positioning groove located on one side of the rear end of the main guide groove; the protective sleeve comprises a protective sleeve main body and a connecting rod, the protective sleeve main body and the elastic piece are sleeved on the hard end of the needle tube and are positioned in the annular hole, the connecting rod is connected with the rear end of the protective sleeve main body and penetrates through the guide long groove, and the connecting rod is positioned in the rear positioning groove; the elastic piece can push the protective sheath main part forward. The utility model discloses can reduce the puncture risk, the operation can be accomplished to the one hand simultaneously, and it is very simple and convenient to operate.

Description

Blood taking needle

Technical Field

The utility model relates to the field of medical supplies, especially, relate to a blood taking needle.

Background

The structure of the front part of the conventional blood taking needle is shown in figure 1, the end part of the needle tube is provided with a needle tube hard end, the needle tube hard end is connected with a needle head, a needle head sleeve is sleeved on the needle head to avoid puncture, and the needle tube hard end is also connected with a handheld handle which is convenient to hold by hand. When the blood taking needle is used, the needle cover is taken down, and after the blood taking needle is used, if the needle cover is sleeved back, the needle is easy to be injured by a needle, so that the pain is caused, and the infection risk is high, so that the direct hand-holding of the needle cover for the back cover is usually forbidden in hospitals at present. However, if the needle head sleeve is not sleeved back, the blood taking needle is directly thrown into the sharp instrument box, and then the pricking risk is also generated in the discarding process.

To avoid puncture wounds, a number of puncture resistant lancet products and related patents have emerged. To the applicant's knowledge, it is common to provide a protective sleeve that is axially movable. After the blood taking needle is used, the handle is held by one hand, the protective sleeve is held by one hand, and the protective sleeve is pulled outwards to be sleeved on the needle head. The blood taking needle can greatly reduce the puncture probability, but requires two hands to participate in operation, and is somewhat inconvenient.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides a blood taking needle with a protective sleeve capable of automatically sleeving a needle head.

The technical scheme adopted for solving the problems is as follows: the blood taking needle comprises a needle tube hard end and a needle head connected to the front end of the needle tube hard end; the device also comprises an end socket outer sleeve, a protective sleeve and an elastic piece; the end sleeve is sleeved outside the needle tube hard end, the rear end of the end sleeve is connected with the needle tube hard end, an annular hole is formed between the end sleeve and the needle tube hard end, a guide long groove is formed in the end sleeve and comprises a main guide groove arranged in the front-back direction and a rear positioning groove located on one side of the rear end of the main guide groove; the protective sleeve comprises a protective sleeve main body and a connecting rod, the protective sleeve main body and the elastic piece are sleeved on the hard end of the needle tube and are positioned in the annular hole, the connecting rod is connected with the rear end of the protective sleeve main body and penetrates through the guide long groove, and the connecting rod is positioned in the rear positioning groove; the elastic piece can push the protective sheath main part forward.

Further, the method comprises the following steps: the guide long groove comprises a front positioning structure positioned on one side of the front end of the main guide groove, and the front positioning structure comprises a front positioning groove and a backward movement prevention groove; the main guide groove can guide the connecting rod to enable the guide connecting rod to enter the front positioning structure.

Further, the method comprises the following steps: the end sleeve is connected with a handheld handle.

Further, the method comprises the following steps: the elastic element is a spring.

Further, the method comprises the following steps: the connecting rod is cylindrical in shape.

Further, the method comprises the following steps: the end face of the connecting rod is provided with patterns capable of increasing friction force.

The utility model has the advantages that: the blood taking needle finishes using, extracts human back, and a handheld end overcoat, a finger of this hand stir the connecting rod a small amount simultaneously, make the connecting rod enter into main guide way from the rear positioning groove, and the elastic component can make the protective sheath antedisplacement automatically, overlaps on the syringe needle, plays and prevents the effect of stabbing. It is thus clear that the utility model discloses can reduce the puncture risk, the operation can be accomplished to the one hand simultaneously, and it is very simple and convenient to operate.

Drawings

FIG. 1 is a view of a conventional lancet structure;

FIG. 2 is a front view of the blood collection needle (sheath retracted state) of the present application;

FIG. 3 is a top view of the blood collection needle (sheath retracted state) of the present application;

FIG. 4 is a front view of the blood collection needle (sheath ejected state) of the present application;

FIG. 5 is a top view of the blood collection needle (sheath ejected state) of the present application;

labeled as: the needle tube hard tip 1, the needle 2, the tip jacket 3, the long guide groove 31, the main guide groove 311, the rear positioning groove 312, the front positioning structure 313, the front positioning groove 3131, the backward movement preventing groove 3132, the protective sleeve 4, the protective sleeve body 41, the connecting rod 42, the elastic piece 5, the handle 6, the needle jacket 7 and the annular hole 8.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 2 and 3: the blood taking needle comprises a needle tube hard end 1 and a needle head 2 connected to the front end of the needle tube hard end 1; the device also comprises an end socket jacket 3, a protective sleeve 4 and an elastic piece 5; the end sleeve 3 is sleeved outside the needle tube hard end 1, the rear end of the end sleeve is connected with the needle tube hard end 1, an annular hole 8 is formed between the end sleeve 3 and the needle tube hard end 1, a guide long groove 31 is formed in the end sleeve 3, and the guide long groove 31 comprises a main guide groove 311 arranged in the front-back direction and a rear positioning groove 312 positioned on one side of the rear end of the main guide groove 311; the protective sleeve 4 comprises a protective sleeve main body 41 and a connecting rod 42, the protective sleeve main body 41 and the elastic piece 5 are sleeved on the needle tube hard end 1 and are positioned in the annular hole 8, the connecting rod 42 is connected with the rear end of the protective sleeve main body 41 and penetrates through the guide long groove 31, and the connecting rod 42 is positioned in the rear positioning groove 312; the elastic member 5 can push the protective cover body 41 forward. The needle 2 is the same as the conventional blood taking needle and is sleeved with a needle cover 7.

After the blood taking needle is used and a human body is pulled out, the end sleeve 3 is held by one hand, and meanwhile, one finger of the hand slightly shifts the connecting rod 42, so that the connecting rod 42 enters the main guide groove 311 from the rear positioning groove 312, the elastic part 5 can automatically enable the protective sleeve 41 to move forwards and be sleeved on the needle head 2, and the puncture-proof effect is achieved. The spring 5 is in the sprung state as shown in fig. 4 and 5.

After the protective sleeve 41 of the blood taking needle is ejected, the protective sleeve 41 is prevented from moving backwards only by supporting the protective sleeve 41 by the elasticity of the elastic member 5, and the protective sleeve 41 has the risk of exposing the needle 2 due to the backward movement because the elasticity of the elastic member 5 cannot be too large. In order to further improve the stab-resistant effect, the following can be further improved: the long guide groove 31 includes a front positioning structure 313 located at one side of the front end of the main guide groove 311, and the front positioning structure 313 includes a front positioning groove 3131 and a backward movement prevention groove 3132; the main guide slot 311 can guide the link 42 such that the guide link 42 enters the front positioning structure 313. Connecting rod 42 gets into and lies in preceding locating groove 3131 behind the preceding location structure 313, if protective sheath 41 atress rearward movement, then connecting rod 42 gets into and prevents groove 3132 that moves backward, prevents that the rear end cell wall of groove 3132 that moves backward supports connecting rod 42 and prevents that it from continuing to move backward, the rational design the utility model discloses a size can guarantee that protective sheath 41 still completely entangles syringe needle 2 when connecting rod 42 contacts with the rear end cell wall of preventing groove 3132 that moves backward. The front positioning structure 313 also prevents the coupling bar 42 from returning to the main guide groove 311. With this arrangement, it is basically ensured that the needle 2 can be reliably received after the protective cover 41 is ejected, and the puncture is avoided unless the connecting rod 42 is intentionally returned to the main guide groove 311 by manual operation.

The specific structure of the guiding slot 31 can be as shown in fig. 3 and 5: the rear end of the guide long groove 31 is U-shaped to form a rear positioning groove 312; the rear section of the main guide slot 311 is linear, and the front section is arc, so that the connecting rod 42 can be guided to enable the connecting rod 42 to enter the front positioning structure 313; the junction of the main guide slot 311 and the front positioning structure 313 is called a tie bar entrance, the front positioning slot 3131 extends forward from the tie bar entrance by a section, and the anti-back-shift slot 3132 extends backward from the tie bar entrance by a section.

In order to facilitate the operation of inserting the needle head 2 into the human body, the utility model discloses should set up handheld handle 6, the difference is the utility model discloses handheld handle 6 is connected on end overcoat 3.

The elastic member 5 may be a conventional spring, and it is apparent that the spring should be a compression spring.

The shape of the connecting rod 42 may be a common shape such as a rectangle, but in order to facilitate smooth movement of the connecting rod 42, the shape of the connecting rod 42 is preferably a cylinder.

In order to facilitate shifting the connecting rod 42, a pattern capable of increasing friction force is arranged on the end face of the connecting rod 42. The connecting rod 42 is not exposed out of the end sleeve 3 too much, and can be pulled a little.

Claims

1. The blood taking needle comprises a needle tube hard end (1) and a needle head (2) connected to the front end of the needle tube hard end (1); the method is characterized in that: comprises an end socket jacket (3), a protective sleeve (4) and an elastic piece (5); the end sleeve (3) is sleeved outside the needle tube hard end (1), the rear end of the end sleeve is connected with the needle tube hard end (1), an annular hole (8) is formed between the end sleeve (3) and the needle tube hard end (1), a guide long groove (31) is formed in the end sleeve (3), and the guide long groove (31) comprises a main guide groove (311) arranged in the front-back direction and a rear positioning groove (312) positioned on one side of the rear end of the main guide groove (311); the protective sleeve (4) comprises a protective sleeve main body (41) and a connecting rod (42), the protective sleeve main body (41) and the elastic piece (5) are sleeved on the needle tube hard end (1) and are positioned in the annular hole (8), the connecting rod (42) is connected with the rear end of the protective sleeve main body (41) and penetrates through the guide long groove (31), and the connecting rod (42) is positioned in the rear positioning groove (312); the elastic piece (5) can push the protective sleeve main body (41) forwards.

2. The blood collection needle according to claim 1, wherein: the long guide groove (31) comprises a front positioning structure (313) positioned on one side of the front end of the main guide groove (311), and the front positioning structure (313) comprises a front positioning groove (3131) and a backward movement prevention groove (3132); the main guide groove (311) can guide the connecting rod (42) so that the guide connecting rod (42) enters the front positioning structure (313).

3. The blood collection needle according to claim 2, wherein: the end sleeve (3) is connected with a hand-held handle (6).

4. The blood collection needle according to claim 3, wherein: the elastic piece (5) is a spring.

5. The blood collection needle according to claim 4, wherein: the connecting rod (42) is cylindrical in shape.

6. The blood collection needle according to claim 5, wherein: the end face of the connecting rod (42) is provided with a pattern capable of increasing friction force.