Sterile injection needle capable of being accurately adjusted

Abstract

The utility model relates to the technical field of injection needles, in particular to an accurately-adjusted sterile injection needle which comprises a device body, the device body comprises a shell, a liquid inlet pipe and an injection needle body, a working cavity is formed in the shell, a driving groove is formed in the top end of the working cavity, the liquid inlet pipe is arranged at the top end of the shell, and the injection needle body is arranged in the driving groove. The bottom end of the liquid inlet pipe penetrates through the driving groove and extends into the working cavity, the position, corresponding to the driving groove, of the surface of the liquid inlet pipe is sleeved with a worm wheel, the worm wheel is rotationally connected with the side wall of the liquid inlet pipe, and through arrangement of the worm wheel, a worm, a driving gear and a driven gear, an operator rotates the driving disc, so that the worm and the worm wheel drive the driving gear to rotate; the driven gear drives the threaded rod to rotate, and the lifting plate and the injection needle body are driven to move through screw-thread fit, so that the length of the injection needle body extending out of the shell is conveniently adjusted, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection needles, in particular to a precisely adjusted sterile injection needle. Background Art

[0002] At present, the microneedles and hyaluronic acid needles on the market use the number of thread rotations to adjust the needle length. Since the rotating structure has no limit or reference structure, the needle length cannot be accurately controlled and identified, the accuracy is low, and the injection depth of penetration into the subcutaneous tissue cannot be controlled, which greatly increases the difficulty and misjudgment of operators. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a precisely adjusted sterile injection needle.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precisely adjusted sterile injection needle comprises a device body, the device body comprises a shell, a liquid inlet tube and an injection needle body, the shell has a built-in working cavity, a driving groove is arranged at the top of the working cavity, a liquid inlet tube is arranged at the top of the shell, the bottom end of the liquid inlet tube passes through the driving groove and extends into the working cavity, a worm gear is mounted on the surface of the liquid inlet tube at a position corresponding to the driving groove, the worm gear is rotatably connected to the side wall of the liquid inlet tube, the driving groove is located at the front side of the worm gear and a worm is rotatably arranged, the worm gear is meshed with the worm gear, a control groove is arranged at a position corresponding to the worm gear on the right side wall of the shell and a driving disk is rotatably arranged in the control groove, and the driving disk is connected to the right end of the worm gear. Then, the bottom end of the worm gear extends into the working cavity and a driving gear is arranged at the bottom end of the worm gear, the bottom end of the liquid inlet pipe penetrates the driving gear and is rotatably connected with the driving gear, the top end of the working cavity is located at the peripheral side of the driving gear and a plurality of groups of driven gears are rotatably arranged, the driven gear is meshed with the driving gear, a threaded rod is arranged at the bottom end of the driven gear, the bottom end of the threaded rod is rotatably connected with the bottom end of the working cavity, a lifting plate is slidably arranged in the working cavity, a conduction tube is arranged at the top end of the lifting plate, the top end of the conduction tube extends into the liquid inlet pipe and is slidably connected with the inner wall of the liquid inlet pipe, an injection hole is arranged at the bottom end of the working cavity, the bottom end of the conduction tube extends into the injection needle body, and the bottom end of the injection needle body passes through the injection hole and extends out of the shell.

[0007] In order to facilitate intuitive adjustment of the length of the injection needle body extending out of the shell, the utility model is improved in that a positioning groove is provided on the left side wall of the working cavity, an observation window is provided at the bottom of the positioning groove, a positioning block is provided at a position corresponding to the positioning groove on the left side wall of the lifting plate, the left end of the positioning block extends into the positioning groove, and scale lines are provided on the surface of the observation window.

[0008] In order to facilitate fixing the shell on the top of the syringe, the utility model is improved in that a mounting tube is arranged on the top of the shell, and a rubber pad is arranged on the inner wall of the mounting tube.

[0009] In order to facilitate manual control of the driving disk to rotate, the utility model is improved in that the side wall of the driving disk is provided with anti-slip grooves.

[0010] In order to improve the use strength of the shell, the utility model is improved in that the shell is made of polypropylene.

[0011] In order to facilitate accurate observation of the length of the injection needle body extending out of the housing, the utility model is improved in that the positioning block is configured to be conical.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a precisely adjusted sterile injection needle, which has the following features:

[0014] Beneficial effects:

[0015] The precisely adjusted sterile injection needle is provided with a worm gear, a worm, a driving gear and a driven gear. The operator rotates the driving disk, thereby driving the driving gear to rotate through the worm and the worm gear, and then driving the threaded rod to rotate through the driven gear, and then driving the lifting plate and the injection needle body to move through the threaded cooperation, so as to facilitate the adjustment of the length of the injection needle body extending out of the housing, and the operation is convenient. Through the provision of the observation window and the positioning block, it is convenient to intuitively observe the distance moved by the lifting plate, so as to know the length of the injection needle body extending out of the housing, so as to facilitate the precise adjustment of the length of the injection needle body extending out of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] In the figure: 1. Shell; 2. Liquid inlet pipe; 3. Injection needle body; 4. Working cavity; 5. Worm gear; 6. Worm; 7. Drive plate; 8. Drive gear; 9. Driven gear; 10. Threaded rod; 11. Lifting plate; 12. Conducting tube; 13. Observation window; 14. Positioning block; 15. Mounting tube. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 , a precisely adjusted sterile injection needle comprises a device body, the device body comprises a shell 1, a liquid inlet tube 2 and an injection needle body 3, the shell 1 has a built-in working cavity 4, a driving groove is arranged at the top of the working cavity 4, a liquid inlet tube 2 is arranged at the top of the shell 1, the bottom end of the liquid inlet tube 2 passes through the driving groove and extends into the working cavity 4, a worm gear 5 is set at a position corresponding to the driving groove on the surface of the liquid inlet tube 2, the worm gear 5 is rotatably connected to the side wall of the liquid inlet tube 2, the driving groove is located at the front side of the worm gear 5 and a worm 6 is rotatably arranged, the worm 6 is meshed with the worm gear 5, a control groove is arranged at a position corresponding to the worm 6 on the right side wall of the shell 1, a driving disk 7 is rotatably arranged in the control groove, the driving disk 7 is connected to the right end of the worm 6, and the bottom end of the worm gear 5 extends into the working cavity 4 A driving gear 8 is arranged at the bottom end of the worm gear 5, and the bottom end of the liquid inlet pipe 2 passes through the driving gear 8 and is rotatably connected to the driving gear 8. A plurality of sets of driven gears 9 are rotatably arranged at the top end of the working cavity 4, which are located around the driving gear 8. The driven gear 9 is meshed with the driving gear 8. A threaded rod 10 is arranged at the bottom end of the driven gear 9, and the bottom end of the threaded rod 10 is rotatably connected to the bottom end of the working cavity 4. A lifting plate 11 is slidably arranged in the working cavity 4, and a conduction tube 12 is arranged at the top end of the lifting plate 11. The top end of the conduction tube 12 extends into the liquid inlet pipe 2 and is slidably connected to the inner wall of the liquid inlet pipe 2. An injection hole is arranged at the bottom end of the working cavity 4, and the bottom end of the conduction tube 12 extends into the injection needle body 3. The bottom end of the injection needle body 3 extends out of the shell 1 through the injection hole. When in use, the operator rotates the driving disk 7, thereby driving the worm wheel 5 and the driving gear 8 to rotate through the worm 6, thereby driving the threaded rod 10 to rotate through the driven gear 9, and then driving the lifting plate 11 and the injection needle body 3 to move up and down through the threaded cooperation, so as to facilitate the adjustment of the length of the injection needle body 3 extending out of the shell 1, and the operation is convenient.

[0022] During use, the operator's experience is required to judge the number of revolutions of the drive disk 7 to adjust the length of the injection needle body 3 extending out of the shell 1, and the operation is not convenient enough. A positioning groove is set on the left side wall of the working cavity 4, and an observation window 13 is set at the bottom of the positioning groove. A positioning block 14 is set at a position corresponding to the positioning groove on the left side wall of the lifting plate 11. The left end of the positioning block 14 extends into the positioning groove, and a scale line is set on the surface of the observation window 13. The operator can intuitively adjust the length of the injection needle body 3 extending out of the shell 1 by aligning the positioning block 14 with the scale line.

[0023] During use, it is inconvenient to fix the shell 1 on the top of the syringe. A mounting tube 15 is provided at the top of the shell 1. A rubber pad is provided on the inner wall of the mounting tube 15. The operator puts the mounting tube 15 on the top of the syringe, thereby facilitating fixing the shell 1 on the top of the syringe.

[0024] During use, it is not convenient to manually control the driving disk 7 to rotate. The utility model has an improvement in that the side wall of the driving disk 7 is provided with anti-slip grooves to facilitate manual control of the driving disk 7 to rotate.

[0025] During transportation, the shell 1 is easily damaged or deformed due to its low strength. For this reason, the shell 1 is made of polypropylene to improve the strength of the shell 1.

[0026] During use, the positioning block 14 has a certain thickness, which may cause observation deviation. The positioning block 14 is configured in a conical shape to facilitate accurate observation of the length of the injection needle body 3 extending out of the housing 1 .

[0027] In the description of this article, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precisely regulated sterile injection needle, comprising a device body, characterized in that: The device body comprises a shell (1), a liquid inlet pipe (2) and an injection needle body (3); the shell (1) has a built-in working cavity (4); a driving groove is arranged at the top of the working cavity (4); a liquid inlet pipe (2) is arranged at the top of the shell (1); the bottom end of the liquid inlet pipe (2) passes through the driving groove and extends into the working cavity (4); a worm wheel (5) is mounted on the surface of the liquid inlet pipe (2) at a position corresponding to the driving groove; the worm wheel (5) is rotatably connected to the side wall of the liquid inlet pipe (2); the driving groove is located at the front side of the worm wheel (5); a worm (6) is rotatably arranged; the worm (6) is meshed with the worm wheel (5); a control groove is arranged at a position corresponding to the worm (6) on the right side wall of the shell (1); a driving disk (7) is rotatably arranged in the control groove; the driving disk (7) is connected to the right end of the worm (6); the bottom end of the worm wheel (5) extends into the working cavity (4) and the bottom end of the worm wheel (5) A driving gear (8) is provided, the bottom end of the liquid inlet pipe (2) passes through the driving gear (8) and is rotatably connected to the driving gear (8), a plurality of groups of driven gears (9) are rotatably provided at the top end of the working cavity (4) and are located on the periphery of the driving gear (8), the driven gear (9) is meshed with the driving gear (8), a threaded rod (10) is provided at the bottom end of the driven gear (9), the bottom end of the threaded rod (10) is rotatably connected to the bottom end of the working cavity (4), a lifting plate (11) is slidably provided in the working cavity (4), a conducting tube (12) is provided at the top end of the lifting plate (11), the top end of the conducting tube (12) extends into the liquid inlet pipe (2) and is slidably connected to the inner wall of the liquid inlet pipe (2), an injection hole is provided at the bottom end of the working cavity (4), the bottom end of the conducting tube (12) extends into the injection needle body (3), and the bottom end of the injection needle body (3) extends out of the housing (1) through the injection hole.

2. The precisely adjusted sterile injection needle according to claim 1, characterized in that: A positioning groove is arranged on the left side wall of the working cavity (4), an observation window (13) is arranged at the bottom of the positioning groove, a positioning block (14) is arranged at a position corresponding to the positioning groove on the left side wall of the lifting plate (11), the left end of the positioning block (14) extends into the positioning groove, and a scale line is arranged on the surface of the observation window (13).

3. The precisely adjusted sterile injection needle according to claim 1, characterized in that: A mounting tube (15) is arranged at the top end of the shell (1), and a rubber pad is arranged on the inner wall of the mounting tube (15).

4. The precisely adjusted sterile injection needle according to claim 1, characterized in that: The side wall of the driving disk (7) is provided with anti-slip grooves.

5. The precisely adjusted sterile injection needle according to claim 1, characterized in that: The shell (1) is made of polypropylene.

6. The precisely adjusted sterile injection needle according to claim 2, characterized in that: The positioning block (14) is configured to be conical.

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