Safe blood taking needle

Abstract

The utility model discloses a safety blood taking needle which comprises a shell, a needle body and a needle head, the needle body is arranged at one end of the shell, one end of the needle head is installed in the needle body in an inserted connection mode, a sliding block is arranged in the shell in an inserted connection sliding mode, and communicating holes communicated with each other are formed in the two ends of the sliding block. An adjusting block is inserted into the communicating hole in a sliding mode, two adjusting strips are evenly arranged at the end, away from the needle head, of the sliding block, two driving plates are evenly arranged on the side wall of the bottom of the shell, driving slopes are formed in the ends, close to the adjusting strips, of the driving plates, and first stabilizing blocks are arranged on the inner side walls of the adjusting strips; two second stabilizing blocks corresponding to the first stabilizing blocks are arranged on the circumferential side of the adjusting block in the circumferential direction, and a spring is arranged between one end of the sliding block and the bottom of the shell. The blood taking needle has the effect of improving the use convenience of the blood taking needle.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a safe blood collection needle. Background Art

[0002] A blood collection needle is an instrument used to collect blood samples during medical examinations. It consists of a needle and a needle rod. The needle is located at the head of the needle rod, and a sheath is slidably connected to the needle rod. A return spring is provided between the sheath and the needle rod, and the initial position of the sheath is located at the head of the needle and the needle rod.

[0003] The application number in the prior art is 2019207534830, and the patent name is a blood collection needle, comprising: a needle handle; a needle, the needle body is located in the needle handle, and the needle head is exposed from the first end of the needle handle; and a needle cap, the needle cap covers the needle head and is flat on the side close to the needle head, wherein: the needle cap is provided with at least one abutment portion extending laterally beyond the side surface near the first end of the needle handle; the first end of the needle handle is provided with a mating structure suitable for abutting with the abutment portion in the axial direction of the blood collection needle.

[0004] It can be seen from the above-mentioned prior art that when the blood collection needle is used for blood collection, the needle cap is removed from one end of the needle handle, so that the needle tip is exposed at one end of the needle handle, so that when the staff uses the blood collection needle, the needle tip will affect the people around, which may easily cause safety hazards. Utility Model Content

[0005] The utility model aims to provide a safe blood collection needle in view of the defects and shortcomings of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The invention comprises a shell, a needle body and a needle head, wherein the needle head is arranged inside one end of the shell, the needle body is arranged at one end of the shell and one end of the needle head is plugged and installed in the needle body, a slider is plugged and slidably inserted in the shell, and communicating holes that are interconnected are provided at both ends of the slider, an adjusting block is plugged and slidably inserted in the communicating hole, one end of the needle head is installed and fixed at the outer end of the adjusting block, two adjusting strips are evenly arranged at the end of the slider away from the needle head, and two driving plates are evenly arranged on the side wall of the bottom of the shell, and the driving plate and the adjusting strip are arranged along the depth direction of the shell. Correspondingly, the driving plate is provided with a driving slope at one end close to the adjustment bar, and the driving slope is arranged to be inclined upward from the inner side wall of the shell toward the inside of the shell, and the inner side wall of the adjustment bar is provided with a first stabilizing block, and two second stabilizing blocks corresponding to the first stabilizing block are circumferentially arranged on the circumference of the adjustment block, and a spring is arranged between one end of the slider and the bottom of the shell, and the spring drives the slider to move toward the outer end of the shell, and when the slider is located inside the shell, the lower side wall of the first stabilizing block and the upper side wall of the second stabilizing block are in contact with each other.

[0008] By adopting the above technical solution, when the blood collection needle is used to collect blood from a person, the needle body is pulled out from one end of the shell to expose the needle tip, but the needle tip is located in the connecting hole of the slider, so that it will not accidentally touch people around, thereby improving the safety of the blood collection needle. Later, when the blood collection needle needs to work, the slider is pressed to slide the slider into the shell until the two adjustment bars contact the driving plate, and under the action of the driving inclined surface, the two adjustment bars are bent outward, so that the first stabilizing block and the second stabilizing block are staggered with each other along the sliding direction of the adjustment block, so that the two first stabilizing blocks will not limit the second stabilizing block, and then under the action of the spring, the adjustment block is moved to one end of the opening of the shell, so that the needle tip pops out from one end of the shell, so that the needle tip pierces the skin of the person, and the blood of the person is collected, thereby improving the convenience of using the blood collection needle.

[0009] Preferably, the first stabilizing block is provided with a first inclined surface on a side close to the needle body, and the second stabilizing block is provided with a second inclined surface on a side away from the needle body, and the first inclined surface and the second inclined surface cooperate with each other.

[0010] By adopting the above technical solution, when the adjusting block is installed in the connecting hole of the slider, under the action of the first inclined surface and the second inclined surface, the two adjusting strips are bent outward until the second stabilizing block is located at the inner end of the first stabilizing block. Under the action of the spring rebound force, the outer side of the first stabilizing block and the inner side of the second stabilizing block are abutted against each other, thereby improving the convenience of installing the adjusting block.

[0011] Preferably, a limit block is provided on the side wall of the adjusting block, and the sliding block is provided with a limit groove for sliding movement of the limit block on the side wall of the communicating hole along the depth direction of the shell.

[0012] By adopting the above technical solution, when the adjusting block slides in the connecting hole of the slider, the limiting block moves in the limiting groove, thereby preventing the adjusting block from rotating in the circumferential direction and improving the sliding stability of the adjusting block.

[0013] Preferably, the corresponding two side walls of the slider are respectively provided with limiting arcs, and the inner circumference of the outer end of the shell is evenly provided with fixing rings, and the limiting arcs abut against the side walls of the fixing rings to limit the slider in the shell.

[0014] By adopting the above technical solution, when the blood collection needle is not working, the adjustment block tends to move outward under the push of the spring, and the mutual stability of the first stabilizing block and the second stabilizing block will prevent the adjustment block from sliding out of the slider. However, the force of the spring will make the slider slide out of the outer shell, and the mutual contact between the limiting arc and the fixing ring will prevent the slider from sliding out of the outer shell, thereby improving the stability of the slider.

[0015] Preferably, the adjusting block is provided with a mounting post at one end away from the needle body, and one end of the spring is sleeved on the peripheral side of the mounting post.

[0016] By adopting the above technical solution, when installing the spring, one end of the spring is sleeved on the installation column, and the other end is abutted against the inner bottom of the shell. When the spring pushes the adjustment block, the spring can stably push the adjustment block.

[0017] Preferably, a first clamping block is provided on the side wall of the mounting column, and the side wall of one end of the spring is clamped on the side wall of the first clamping block.

[0018] By adopting the above technical solution, when the adjusting block pops out from one end of the slider, the first clamping block clamps the spring, so that the adjusting block will not completely slide out of the connecting hole of the slider, thereby improving the stability between the spring and the adjusting block.

[0019] Preferably, the driving plate is provided with a second clamping block inclined outwardly on the inner side of one end away from the adjusting bar, and the spring is clamped on the side wall of the second clamping block at the side wall of the end away from the adjusting block.

[0020] By adopting the above technical solution, when installing the spring, one end of the spring is inserted between the two driving plates until one end of the spring abuts against the inner bottom of the shell, and the second clamping block on the side wall of one end of the driving plate is clamped in the spring, so that the spring will not easily slide out of the shell, thereby improving the stability between the spring and the shell.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Under the action of the first inclined surface and the second inclined surface, the two adjustment strips are bent outward until the second stabilizing block is located at the inner end of the first stabilizing block. Under the action of the spring rebound force, the outer side of the first stabilizing block and the inner side of the second stabilizing block are abutted against each other, thereby improving the convenience of installing the adjustment block;

[0023] 2. When the adjusting block slides in the connecting hole of the slider, the limiting block moves in the limiting groove, thereby preventing the adjusting block from rotating in the circumferential direction and improving the sliding stability of the adjusting block;

[0024] 3. When installing the spring, put one end of the spring on the mounting column, and the other end abuts against the inner bottom of the housing, so that when the spring pushes the adjusting block, the spring can push the adjusting block stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional schematic diagram of the utility model blood collection needle;

[0026] Figure 2 It is a cross-sectional schematic diagram of the utility model blood collection needle from another direction;

[0027] Figure 3 It is a schematic diagram of the explosion of the blood collection needle of the utility model;

[0028] Figure 4 It is an exploded schematic diagram of the utility model blood collection needle from another perspective.

[0029] In the figure: 1. shell; 2. needle body; 3. needle head; 4. adjustment block; 5. slider; 6. connecting hole; 7. fixing ring; 8. limiting arc; 9. placement groove; 10. adjustment bar; 11. first stabilizing block; 12. second stabilizing block; 13. first inclined plane; 14. second inclined plane; 15. driving plate; 16. driving inclined plane; 17. mounting column; 18. spring; 19. first clamping block; 20. second clamping block; 21. limiting block; 22. limiting groove. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] The embodiment of the present application discloses a safe blood collection needle.

[0032] Reference Figure 1 and Figure 2, comprising a shell 1, a needle body 2, a needle head 3, an adjusting block 4 and a slider 5. The slider 5 is inserted and slid in the shell 1. Both ends of the slider 5 are provided with interconnected communicating holes 6. The adjusting block 4 is inserted and slid in the communicating hole 6 of the slider 5. One end of the needle head 3 is inserted and fixed in the outer end of the adjusting block 4, and one end of the needle body 2 is inserted into the communicating hole 6 of the slider 5. When the blood collection needle is not in use, the lower end of the needle body 2 is integrally connected with the upper end of the adjusting block 4. When the blood collection needle needs to be used for blood collection, the needle body 2 is twisted to separate the lower end of the needle body 2 from the upper end of the adjusting block 4, and then the needle body 2 is pulled out from the opening of the shell 1, so that the needle head 3 is exposed to the upper end of the adjusting block 4.

[0033] The cross section of the housing 1 is in the shape of a racetrack ring, and a fixing ring 7 is integrally provided on two arc-shaped inner side walls corresponding to one end of the opening of the housing 1, and a limiting arc 8 is integrally provided on the corresponding two side walls of the slider 5, and the limiting arc 8 is clamped on the inner side of the fixing ring 7. When the limiting arc 8 and the fixing ring 7 abut against each other, the slider 5 is restricted in the housing 1.

[0034] Two placement grooves 9 are evenly arranged around the inner end of the slider 5, and an adjustment strip 10 is integrally arranged at the bottom of the placement groove 9. The two side walls of the adjustment strip 10 are respectively at the same distance from and equal to the inner side walls of the placement groove 9. A first stabilizing block 11 is integrally arranged on the inner side of the middle of the adjustment strip 10, and second stabilizing blocks 12 are respectively integrally arranged on the corresponding two side walls of the adjustment block 4. The first stabilizing block 11 is provided with a first inclined surface 13 on the side close to the needle body 2, and the second stabilizing block 12 is provided with a second inclined surface 14 on the side away from the needle body 2, and the first inclined surface 13 and the second inclined surface 14 cooperate with each other.

[0035] Two driving plates 15 are evenly and vertically arranged on the side wall at the bottom of the shell 1. The driving plates 15 correspond to the adjustment strip 10 along the depth direction of the shell 1. The driving plate 15 is provided with a driving slope 16 at one end close to the adjustment strip 10. The driving slope 16 is arranged upwardly and obliquely from the inner side wall of the shell 1 toward the inside of the shell 1.

[0036] The adjusting block 4 is integrally provided with a mounting column 17 at one end away from the needle body 2 , and a spring 18 is sleeved around the mounting column 17 , one end of the spring 18 abuts against one end surface of the adjusting block 4 , and the other end abuts against the inner bottom of the outer shell 1 , and the spring 18 is located between the two driving plates 15 .

[0037] The side wall of the mounting column 17 is evenly and integrally provided with two first clamping blocks 19, and the side wall of one end of the spring 18 is clamped on the side walls of the two first clamping blocks 19. The driving plate 15 is integrally provided with a second clamping block 20 inclined outwardly on the inner side of the end away from the adjustment bar 10, and the side wall of the spring 18 at the end away from the adjustment block 4 is clamped on the side wall of the second clamping block 20. Under the action of the first clamping block 19 and the second clamping block 20, one end of the spring 18 will not be separated from the bottom of the housing 1, and the other end will not be separated from the adjustment block 4.

[0038] Reference Figure 3 and Figure 4 The corresponding two side walls of the adjusting block 4 are respectively provided with limit blocks 21 in one piece, and the slider 5 is provided with limit grooves 22 for the limit blocks 21 to slide on the corresponding two side walls of the communicating hole 6 along the depth direction of the housing 1.

[0039] The implementation principle of a safe blood collection needle disclosed in the embodiment of the present application is:

[0040] First, the needle body 2 is twisted to separate the lower end of the needle body 2 from the upper end of the adjusting block 4, and the needle body 2 is pulled out from one end of the shell 1 to expose the needle head 3, but the needle head 3 is located in the connecting hole 6 of the slider 5. The slider 5 is pressed to slide the slider 5 into the shell 1 until the two adjusting bars 10 contact the driving plate 15. Under the action of the driving inclined surface 16, the two adjusting bars 10 are bent outward, so that the first stabilizing block 11 and the second stabilizing block 12 are staggered from each other along the sliding direction of the adjusting block 4, so that the two first stabilizing blocks 11 will not limit the second stabilizing block 12. Then, under the action of the spring 18, the adjusting block 4 is moved toward one end of the opening of the shell 1, so that the needle head 3 pops out from one end of the shell 1, so that the needle head 3 pierces the human skin.

[0041] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A safe blood collection needle, comprising a housing (1), a needle body (2) and a needle head (3), wherein the needle head (3) is arranged inside one end of the housing (1), the needle body (2) is arranged at one end of the housing (1) and one end of the needle head (3) is plugged and installed in the needle body (2), characterized in that: A slider (5) is inserted and slidably mounted in the housing (1), and interconnected communication holes (6) are provided at both ends of the slider (5). An adjustment block (4) is inserted and slidably mounted in the communication hole (6). One end of the needle (3) is fixedly mounted on the outer end of the adjustment block (4). Two adjustment strips (10) are evenly arranged at the end of the slider (5) away from the needle (3). Two driving plates (15) are evenly arranged on the side wall of the bottom of the housing (1). The driving plates (15) correspond to the adjustment strips (10) along the depth direction of the housing (1). The driving plates (15) are provided with a driving inclined surface (16) at the end close to the adjustment strip (10). The inclined surface (16) is arranged to be inclined upward from the inner side wall of the shell (1) toward the inside of the shell (1); the inner side wall of the adjustment bar (10) is provided with a first stabilizing block (11); two second stabilizing blocks (12) corresponding to the first stabilizing block (11) are arranged in a circumferential direction around the adjustment block (4); a spring (18) is arranged between one end of the slider (5) and the bottom of the shell (1); the spring (18) drives the slider (5) to move toward the outer end of the shell (1); when the slider (5) is located inside the shell (1), the lower side wall of the first stabilizing block (11) and the upper side wall of the second stabilizing block (12) are in contact with each other.

2. A safe blood collection needle according to claim 1, characterized in that: The first stabilizing block (11) is provided with a first inclined surface (13) on a side close to the needle body (2), and the second stabilizing block (12) is provided with a second inclined surface (14) on a side away from the needle body (2), and the first inclined surface (13) and the second inclined surface (14) cooperate with each other.

3. A safe blood collection needle according to claim 1, characterized in that: A limit block (21) is provided on the side wall of the adjustment block (4), and a limit groove (22) for the limit block (21) to slide is provided on the side wall of the connecting hole (6) of the sliding block (5) along the depth direction of the housing (1).

4. A safe blood collection needle according to claim 1, characterized in that: The corresponding two side walls of the slider (5) are respectively provided with limiting arcs (8), and the inner circumference of the outer end of the housing (1) is evenly provided with fixing rings (7), and the limiting arcs (8) abut against the side walls of the fixing rings (7) to limit the slider (5) within the housing (1).

5. A safe blood collection needle according to claim 1, characterized in that: The adjusting block (4) is provided with a mounting column (17) at one end away from the needle body (2), and one end of the spring (18) is sleeved on the circumference of the mounting column (17).

6. A safe blood collection needle according to claim 5, characterized in that: A first clamping block (19) is provided on the side wall of the mounting column (17), and a side wall at one end of the spring (18) is clamped on the side wall of the first clamping block (19).

7. A safe blood collection needle according to claim 1, characterized in that The driving plate (15) is provided with a second clamping block (20) inclined outwardly on the inner side of the end away from the adjusting bar (10), and the spring (18) is clamped on the side wall of the second clamping block (20) at the side wall of the end away from the adjusting block (4).

Images