Injection needle sharpening device

Abstract

The invention belongs to the field of medical instruments, and particularly relates to an injection needle sharpening device which comprises a support, a sharpening cylinder and a millstone, the sharpening cylinder is of a cylindrical structure with an upward opening, the sharpening cylinder is vertically arranged on the upper surface of the support, a motor is arranged on the support, and a rotating block is coaxially and rotationally arranged at the inner bottom of the sharpening cylinder; an output shaft of the motor extends into the sharpening cylinder and is coaxially and fixedly connected with a rotating block; a millstone is fixedly arranged on the upper surface of the rotating block; according to the injection needle sharpening device, the mode that the grinding stone driven by the output shaft of the motor is arranged in the sharpening cylinder is adopted, the designed injection needle sharpening device can be matched with the mechanical arm for clamping the injection needle to grind the injection needle, and the problem that at present, after the injection needle is passivated, the injection needle needs to be directly replaced with a new injection needle, and the cost is high is solved.

Description

Technical Field

[0001] This application belongs to the field of medical devices, and specifically relates to an injection needle sharpening device. Background Art

[0002] When performing experimental surgeries on animals, invasive operations such as tissue cutting and tracheal transplantation are usually involved. Therefore, through anesthesia, the transmission of pain signals can be effectively blocked, avoiding behaviors such as struggling and screaming of animals due to severe pain. Moreover, in long-term experiments for monitoring blood pressure and heart rate, anesthesia can also reduce the continuous stress response of animals caused by restraint or device implantation.

[0003] Currently, before conducting experiments on existing animals, it is usually necessary to inject anesthetic drugs into them. However, the fur of animals is relatively thick, which easily causes the injection needle to become blunt. Therefore, it is necessary to frequently replace the injection needle, resulting in high costs. In order to reduce costs, a device for grinding the injection needle needs to be designed to grind the blunt injection needle for continued use later. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of the existing technology. By adopting the method of setting a grindstone driven by the output shaft of a motor inside a sharpening cylinder, an injection needle sharpening device is designed. It can cooperate with a manipulator for clamping the injection needle to grind the injection needle, solving the problem that currently, after the injection needle becomes blunt, a new injection needle needs to be directly replaced, resulting in high costs.

[0005] To achieve the above purpose, this application adopts the following technical solutions:

[0006] An injection needle sharpening device includes a bracket, a sharpening cylinder, and a grindstone. The sharpening cylinder is a cylindrical structure with an upward opening. The sharpening cylinder is vertically arranged on the upper surface of the bracket. A motor is provided on the bracket. A rotating block is coaxially and rotatably arranged at the inner bottom of the sharpening cylinder. The output shaft of the motor extends into the sharpening cylinder and is coaxially and fixedly connected to the rotating block. The grindstone is fixedly arranged on the upper surface of the rotating block.

[0007] Preferably, there are two grindstones inside the sharpening cylinder on the rotating block. The two grindstones are symmetrical about the central axis of the sharpening cylinder. The distance from the lower segment of the grindstone to the axis of the sharpening cylinder is less than the distance from the upper end of the grindstone to the axis of the sharpening cylinder.

[0008] Preferably, a preset gap is provided between the lower ends of the two grindstones. A blind hole coaxial with the axis of the sharpening cylinder is provided on the upper surface of the rotating block.

[0009] Preferably, a distance adjuster is provided on the rotating block. The distance between the lower ends of the two grindstones is adjusted through the distance adjuster.

[0010] Preferably, the distance adjuster includes a first fixing block, a second fixing block, and a double-threaded screw rod. The left section of the double-threaded screw rod is provided with a right-handed thread, and the right section of the double-threaded screw rod is provided with a left-handed thread. The right end of the right-handed thread abuts against the left end of the left-handed thread. The first fixing block is provided with a first screw hole that mates with the right-handed thread, and the second fixing block is provided with a second screw hole that mates with the left-handed thread. Both the first fixing block and the second fixing block are slidably connected to the rotating block. The double-threaded screw rod is rotatably arranged on the rotating block, and one end of the double-threaded screw rod penetrates outside the rotating block. The rotating block is provided with a locking device for locking the double-threaded screw rod. The lower end of one grindstone is fixedly connected to the upper surface of the first fixing block, and the lower end of the other grindstone is fixedly connected to the upper surface of the second fixing block.

[0011] Preferably, the grindstone has a cylindrical structure. Each of the two end faces of the grindstone is coaxially provided with a mounting handle. The lower ends of the two grindstones are fixedly connected to the first fixing block and the second fixing block respectively through their respective mounting handles. An installation ring is coaxially and rotatably arranged on the inner top wall of the sharpening cylinder. The upper end of the grindstone is fixedly connected to the installation ring.

[0012] Preferably, a cover body is provided at the opening of the sharpening cylinder. The cover body is provided with a circular through hole that is coaxial with the sharpening cylinder. The installation ring is rotatably arranged on the cover body. The cover body is detachably and fixedly connected to the sharpening cylinder.

[0013] Preferably, a flushing assembly is further provided inside the sharpening cylinder.

[0014] Preferably, the flushing assembly includes a water inlet pipe and a water inlet tube. An annular housing is coaxially and rotatably arranged on the inner bottom of the sharpening cylinder. The annular housing is a hollow structure. An annular opening is coaxially provided on the outer circumferential wall of the annular housing. A retaining ring is provided inside the annular housing. The retaining ring is concentric with the annular housing. The outer wall of the retaining ring is slidably connected to the inner wall of the annular housing. One end of the water inlet pipe penetrates through the annular opening and the retaining ring and extends into the hollow structure. A water inlet tube is provided on the inner circumferential wall of the hollow structure. One end of the water inlet tube is inside the hollow structure, and the other end is inside the sharpening cylinder. The end of the water inlet tube located inside the sharpening cylinder is fixed on the upper surface of the rotating block. A water outlet pipe is fixedly provided on the inner bottom wall of the sharpening cylinder.

[0015] Preferably, the width of the retaining ring is equal to the distance between the inner top wall and the inner bottom wall of the hollow structure.

[0016] Preferably, a sealing ring is coaxially provided on each of the upper surface and the lower surface of the retaining ring.

[0017] The present application has the following beneficial effects:

[0018] This application designs an injection needle sharpening device by setting a grindstone driven by the output shaft of a motor inside a sharpening cylinder, which can cooperate with a manipulator clamping the injection needle to polish the injection needle, solving the problem that the injection needle needs to be directly replaced with a new one after being dull, resulting in high costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of this application;

[0020] Figure 2 is a schematic cross-sectional view of the second embodiment of the rotating block adopted to avoid the injection needle being damaged during the grinding process in this application;

[0021] Figure 3 is a relationship diagram of the annular shell and the retaining ring in this application;

[0022] Figure 4 is Figure 3 an exploded view of;

[0023] Figure 5 is a schematic cross-sectional view of the rotating block when the second embodiment of the rotating block adopted to avoid the injection needle being damaged during the grinding process in this application.

[0024] Among them, 1. Bracket; 2. Sharpening cylinder; 3. Grindstone; 4. Motor; 5. Rotating block; 6. Blind hole; 7. First fixing block; 8. Second fixing block; 9. Double-threaded lead screw; 10. Mounting handle; 11. Cover body; 12. Circular through hole; 13. Water inlet pipe; 14. Water inlet pipe; 15. Annular shell; 16. Retaining ring; 17. Water outlet pipe; 18. Sealing ring; 19. Annular opening; 20. Mounting ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] As Figures 1-5 shown, an injection needle sharpening device includes a bracket 1, a sharpening cylinder 2, and a grindstone 3. The sharpening cylinder 2 is a cylindrical structure with an upward opening. The sharpening cylinder 2 is vertically arranged on the upper surface of the bracket 1. A motor 4 is arranged on the bracket 1. A rotating block 5 is coaxially and rotatably arranged at the inner bottom of the sharpening cylinder 2. The output shaft of the motor 4 extends into the sharpening cylinder 2 and is coaxially and fixedly connected to the rotating block 5. The grindstone 3 is fixedly arranged on the upper surface of the rotating block 5.

[0026] In this embodiment, when in use, the manipulator grabs the root of the injection needle and extends it into the sharpening cylinder 2 from the opening of the sharpening cylinder 2. At the same time, the motor 4 drives the rotating block 5 in the sharpening cylinder 2 to rotate, thereby driving the grindstone 3 to rotate, so as to polish the head (the end inserted into the skin) of the injection needle, making the injection needle sharp. Due to the setting of the sharpening cylinder 2, most of the dust generated during the grinding process is located inside the sharpening cylinder 2, reducing the dispersion of dust.

[0027] As a preferred method, two grinding stones 3 are provided in the sharpening cylinder 2 on the rotating block 5. The two grinding stones 3 are symmetric about the central axis of the sharpening cylinder 2. The distance from the lower end of the grinding stone 3 to the axis of the sharpening cylinder 2 is less than the distance from the upper end of the grinding stone 3 to the axis of the sharpening cylinder 2. By setting the two grinding stones 3 in this way, mainly through the number of the grinding stones 3, it is ensured that the center of gravity of the sharpening cylinder 2 and its internal structure will not shift during the rotation of the grinding stones 3, thus ensuring the service life of the equipment. The distance from the lower end of the grinding stone 3 to the axis of the sharpening cylinder 2 is less than the distance from the upper end of the grinding stone 3 to the axis of the sharpening cylinder 2, that is, the grinding stone 75 is inclined, which is convenient for grinding the injection needle. Because the mechanical hand can adjust the depth of the injection needle inserted into the sharpening cylinder 2 according to the degree of grinding required. That is to say, the closer the injection needle is to the lower end of the grinding stone 3, the more severely it is ground.

[0028] In order to avoid damaging the injection needle during the grinding process, two methods are adopted.

[0029] Method 1: A preset gap is provided between the lower ends of the two grinding stones 3. A blind hole 6 coaxial with the axis of the sharpening cylinder 2 is provided on the upper surface of the rotating block 5. After such a setting, it is possible to grind the head (the end inserted into the skin) of the injection needle. The setting of the blind hole 6 is for making a space for accommodation, so as to avoid damaging the head (the end inserted into the skin) of the injection needle during the process that the rotating block 5 drives the injection needle to move downward for grinding, that is, the head of the injection needle can extend into the blind hole 6 to avoid being damaged or collided.

[0030] Method 2: A distance adjuster is provided on the rotating block 5. The distance between the lower ends of the two grinding stones 3 is adjusted by the distance adjuster. By adjusting the distance between the lower ends of the two grinding stones 3 through the distance adjuster, the inclination angle of the grinding stone 3 is thus changed, so as to adapt to the grinding of injection needles with different diameters. Especially after the grinding stone 3 is used and there is wear, it is necessary to adjust the distance between the two grinding stones 3.

[0031] As a preferred embodiment, the distance adjuster includes a first fixing block 7, a second fixing block 8, and a double-threaded screw rod 9. The left section of the double-threaded screw rod 9 is provided with a right-handed thread, and the right section of the double-threaded screw rod 9 is provided with a left-handed thread. The right end of the right-handed thread abuts against the left end of the left-handed thread. The first fixing block 7 is provided with a first threaded hole that mates with the right-handed thread, and the second fixing block 8 is provided with a second threaded hole that mates with the left-handed thread. Both the first fixing block 7 and the second fixing block 8 are slidably connected to the rotating block 5. The double-threaded screw rod 9 is rotatably disposed on the rotating block 5, and one end of the double-threaded screw rod 9 penetrates outside the rotating block 5. The rotating block 5 is provided with a locking device for locking the double-threaded screw rod 9. The lower end of one grinding stone 3 is fixedly connected to the upper surface of the first fixing block 7, and the lower end of the other grinding stone 3 is fixedly connected to the upper surface of the second fixing block 8. After such a setting, by rotating the double-threaded screw rod 9, the first fixing block 7 and the second fixing block 8 can be adjusted to approach or move away from each other as needed. The approaching or moving away of the first fixing block 7 and the second fixing block 8 drives the lower ends of the two grinding stones 3 to approach or move away from each other. The locking device is a bolt. The rotating block is provided with a locking threaded hole that mates with the bolt. The axis of the locking threaded hole is perpendicular to the double-threaded screw rod 9. After holding the part of the double-threaded screw rod 9 outside the rotating block 5 and rotating it to a preset position, the bolt can be screwed into the locking threaded hole to abut against the circumferential wall of the double-threaded screw rod 9 to achieve locking.

[0032] As a preferred embodiment, the grinding stone 3 has a cylindrical structure. Each of the two end faces of the grinding stone 3 is coaxially provided with a mounting handle 10. The lower ends of the two grinding stones 3 are respectively fixedly connected to the first fixing block 7 and the second fixing block 8 through their respective mounting handles 10. An installation ring 20 is coaxially and rotatably disposed on the inner top wall of the sharpening cylinder 2. The upper end of the grinding stone 3 is fixedly connected to the installation ring 20. By providing the installation ring 20, the upper end of the grinding stone 3 can be restricted while not affecting the rotation of the upper end of the grinding stone 3 along with the rotating block 5. The setting of the mounting handle 10 is to enable the lower ends of the two grinding stones 3 to be adjusted to a state of being in close contact with each other, so as to avoid the situation where the lower ends of the two grinding stones 3 cannot be adjusted to a state of being in close contact with each other due to the setting of the first fixing block 7 and the second fixing block 8, thereby resulting in the inability to grind some injection needles with very small diameters. For the setting of the installation ring 20, a bearing can be fixedly provided at the inner top of the sharpening cylinder 2. The inner ring of the bearing is fixed to the inner top of the sharpening cylinder 2, and the outer ring of the bearing is fixedly connected to the installation ring 20. The bearing is coaxial with the sharpening cylinder 2.

[0033] As a preferred embodiment, a cover body 11 is provided at the opening of the sharpening cylinder 2. A circular through hole 12 coaxial with the sharpening cylinder 2 is provided on the cover body 11. The mounting ring 20 is rotatably arranged on the cover body 11, and the cover body 11 is detachably and fixedly connected to the sharpening cylinder 2. By providing the cover body 11, it is convenient to connect the upper end of the sharpening cylinder 2 to the grindstone 2.

[0034] As a preferred embodiment, a flushing assembly is further provided in the sharpening cylinder 2. By providing the flushing assembly, the injection needle being ground is cooled, and at the same time, the impurities on the rotating block 5 are washed away.

[0035] As a preferred embodiment, the flushing assembly includes a water inlet pipe 13 and a water inlet pipe 14. An annular housing 15 is coaxially and rotatably arranged on the inner bottom of the sharpening cylinder 2. The annular housing 15 is a hollow structure. An annular opening 19 is coaxially provided on the outer circumferential wall of the annular housing 15. A retaining ring 16 is arranged in the annular housing 15. The retaining ring 16 is concentric with the annular housing 15. The outer wall of the retaining ring 16 is slidably connected to the inner wall of the annular housing 15. One end of the water inlet pipe 13 passes through the annular opening 19 and the retaining ring 16 and extends into the hollow structure. A water inlet pipe 14 is provided on the inner circumferential wall of the hollow structure. One end of the water inlet pipe 14 is inside the hollow structure, and the other end is inside the sharpening cylinder 2. The end of the water inlet pipe 14 located inside the sharpening cylinder 2 is fixed on the upper surface of the rotating block 5. An outlet pipe 17 is fixedly arranged on the inner bottom wall of the sharpening cylinder 2. After such a setting, water enters from the water inlet pipe 13, then enters the hollow structure of the annular housing 15, and then flows out from the outlet of the water outlet pipe 14 and rushes towards the rotating block 5. On the one hand, this can wash away the fine particle dust ground from the injection needle and the rotating block 5, making the ground injection needle clean. On the other hand, it can cool the injection needle being ground and play a cooling role. The function of the retaining ring (16) is to fix the outlet end of the water inlet pipe 13. When in use, the water inlet pipe 14 and the annular housing 15 will rotate together with the rotating block 5, so as to ensure that the water inlet pipe 14 is relatively stationary with respect to the dust and impurities falling on the rotating block 5, making the flushing function of the water inlet pipe 14 better. The outer wall of the retaining ring 16 (on the upper and lower sides inside the sharpening cylinder 2) is slidably connected to the inner wall of the annular housing 15, so as to ensure that the water in the annular housing 15 can only go out from the outlet pipe 17 and rush towards the rotating block 5, thus not affecting the water pressure.

[0036] As a preferred embodiment, the width of the retaining ring 16 is equal to the distance between the inner top wall and the inner bottom wall of the hollow structure.

[0037] As a preferred embodiment, a sealing ring 18 is coaxially provided on each of the upper surface and the lower surface of the retaining ring 16. By providing the sealing ring 18, the airtightness between the retaining ring 16 and the inside of the annular shell 15 is increased. The sealing ring 18 adopts dynamic sealing, so that the relative rotation between the retaining ring 16 and the annular shell 15 will not be affected.

Claims

1. An injection needle sharpening device, characterized in that: It includes a bracket (1), a sharpening cylinder (2), and a grindstone (3). The sharpening cylinder (2) is a cylindrical structure with an upward opening. The sharpening cylinder (2) is vertically arranged on the upper surface of the bracket (1). A motor (4) is provided on the bracket (1). A rotating block (5) is coaxially and rotatably arranged at the inner bottom of the sharpening cylinder (2). The output shaft of the motor (4) extends into the sharpening cylinder (2) and is coaxially and fixedly connected to the rotating block (5). The grindstone (3) is fixedly arranged on the upper surface of the rotating block (5).

2. The sharpening device for an injection needle according to claim 1, characterized in that: There are two grindstones (3) in the sharpening cylinder (2) on the rotating block (5). The two grindstones (3) are symmetric about the central axis of the sharpening cylinder (2). The distance from the lower segment of the grindstone (3) to the axis of the sharpening cylinder (2) is less than the distance from the upper end of the grindstone (3) to the axis of the sharpening cylinder (2).

3. The sharpening device for an injection needle according to claim 2, wherein: A preset gap is provided between the lower ends of the two grindstones (3). A blind hole (6) coaxial with the axis of the sharpening cylinder (2) is provided on the upper surface of the rotating block (5).

4. An injection needle sharpening device according to claim 2, characterized in that: A distance adjuster is provided on the rotating block (5). The distance between the lower ends of the two grindstones (3) is adjusted by the distance adjuster.

5. An injection needle sharpening device according to claim 4, characterized in that: The distance adjuster includes a first fixing block (7), a second fixing block (8), and a double-threaded screw rod (9). The left segment of the double-threaded screw rod (9) is provided with a right-handed thread, and the right segment of the double-threaded screw rod (9) is provided with a left-handed thread. The right end of the right-handed thread abuts against the left end of the left-handed thread. A first screw hole matching the right-handed thread is provided on the first fixing block (7). A second screw hole matching the left-handed thread is provided on the second fixing block (8). Both the first fixing block (7) and the second fixing block (8) are slidably connected to the rotating block (5). The double-threaded screw rod (9) is rotatably arranged on the rotating block (5). One end of the double-threaded screw rod (9) penetrates outside the rotating block (5). A locking device for locking the double-threaded screw rod (9) is provided on the rotating block (5). The lower end of one grindstone (3) is fixedly connected to the upper surface of the first fixing block (7), and the lower end of the other grindstone (3) is fixedly connected to the upper surface of the second fixing block (8).

6. The sharpening device for an injection needle according to claim 5, wherein, The grindstone (3) is of a cylindrical structure. An installation handle (10) is coaxially provided on each of the two end faces of the grindstone (3). The lower ends of the two grindstones (3) are respectively fixedly connected to the first fixing block (7) and the second fixing block (8) through their respective installation handles (10). An installation ring (20) is coaxially and rotatably arranged on the inner top wall of the sharpening cylinder (2). The upper end of the grindstone (3) is fixedly connected to the installation ring (20).

7. An injection needle sharpening device according to claim 5, characterized in that, A cover body (11) is provided at the opening of the sharpening cylinder (2). A circular through hole (12) coaxial with the sharpening cylinder (2) is provided on the cover body (11). The installation ring (20) is rotatably arranged on the cover body (11). The cover body (11) is detachably and fixedly connected to the sharpening cylinder (2).

8. An injection needle sharpening device according to claim 3, characterized in that, A flushing assembly is also provided in the sharpening cylinder (2).

9. The injection needle sharpening device according to claim 8, characterized in that, The flushing assembly includes a water inlet pipe (13) and a water inlet pipe (14). An annular housing (15) is coaxially and rotatably provided on the inner bottom of the sharpening cylinder (2). The annular housing (15) is a hollow structure. An annular opening (19) is coaxially formed on the outer circumferential wall of the annular housing (15). A retaining ring (16) is provided inside the annular housing (15). The retaining ring (16) is concentric with the annular housing (15). The outer wall of the retaining ring (16) is slidably connected to the inner wall of the annular housing (15). One end of the water inlet pipe (13) penetrates through the annular opening (19) and the retaining ring (16) and extends into the hollow structure. A water inlet pipe (14) is provided on the inner circumferential wall of the hollow structure. One end of the water inlet pipe (14) is inside the hollow structure, and the other end is inside the sharpening cylinder (2). The end of the water inlet pipe (14) located inside the sharpening cylinder (2) is fixed on the upper surface of the rotating block (5). A water outlet pipe (17) is fixedly provided on the inner bottom wall of the sharpening cylinder (2).

10. The injection needle sharpening device according to claim 9, characterized in that, The width of the retaining ring (16) is equal to the distance between the inner top wall and the inner bottom wall of the hollow structure.

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