Coupling agent smearing device

Abstract

The utility model relates to the technical field of medical equipment, and discloses a coupling agent smearing device which comprises a coupling agent bottle body, and a vertical groove is formed in the bottom end of the coupling agent bottle body. Through the arrangement of a first spring, an extrusion block, a second spring and a toothed plate, due to the limiting effect of a square block, a moving block can only move up and down, and when the whole pressing block drives the moving block to move downwards through a moving rod, the pressing block extrudes the outer surface of the toothed plate through the extrusion block at the moment; at the moment, a toothed plate drives an extrusion plate and a rubber ring to move downwards along the interior of a couplant bottle body through a second spring, in the process, the bottom end of the extrusion plate extrudes and pushes a couplant located in the couplant bottle body, and then the couplant drips onto the skin of a patient through a vertical groove and a circular groove; therefore, the effect of quantitatively extruding the coupling agent is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a coupling agent application device. Background Technology

[0002] Medical coupling agent is a medical product composed of a new generation of water-based polymer gel. It has a neutral pH value, is non-toxic and harmless to the human body, does not easily dry out or become rancid, has suitable viscosity, is non-greasy, makes the probe easy to slide, can moisten the skin, eliminate air on the skin surface, has good lubrication properties, and is easy to unfold; it does not corrode or damage the ultrasound probe.

[0003] When medical staff perform ultrasound examinations, they often use coupling gel to make the ultrasound images clearer, facilitating subsequent examinations and treatments. Currently, coupling gel is often stored in a bottle. When medical staff need to use the coupling gel, they need to squeeze the bottle to expel it from the opening. Because the bottle is squeezed manually, the amount of coupling gel expelled each time is inconsistent. When less coupling gel is expelled, medical staff need to squeeze it again; when more coupling gel is expelled, medical staff need to scrape off the excess. This is inconvenient for medical staff and also wastes coupling gel. Therefore, this method needs to be improved. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a coupling agent application device, which has the advantage of quantitatively extruding coupling agent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coupling agent application device, comprising:

[0006] The coupling agent bottle has a vertical groove at its bottom, which is connected to the inside of the coupling agent bottle. A compression plate is movably fitted onto the top of the inside of the coupling agent bottle. Vertical rods are fixedly installed on both the left and right sides of the top of the compression plate, and a circular plate is fixedly installed on the top of the vertical rods.

[0007] A fixing block, the top of which is fixedly connected to the bottom of the coupling agent bottle, and a circular groove is provided at the bottom of the fixing block, the interior of which is connected to the interior of the vertical groove;

[0008] The pressing mechanism is located at the top of the outer surface of the coupling agent bottle;

[0009] The pressing mechanism includes a square block. The left side of the square block is fixedly connected to the top of the outer surface of the coupling agent bottle. A first spring is fixedly installed at the bottom of the inside of the square block. A moving block is fixedly installed at the top of the first spring. The outer surface of the moving block is movably connected to the inside of the square block. A moving rod is fixedly installed at the top of the moving block. The top of the moving rod penetrates the inside of the square block and extends to the top of the square block. A pressing block is fixedly installed at the top of the moving rod. A round rod is fixedly installed on the right side of the inside of the pressing block. A squeezing block is movably connected to the outer surface of one end of the round rod. The outer surface of the squeezing block is movably connected to the inside of the pressing block. A second spring is fixedly installed on the right side of the squeezing block. The inside of the second spring is movably connected to the outer surface of the round rod. The right side of the second spring is fixedly connected to the inside of the pressing block. A toothed plate is movably connected to the left side of the squeezing block. The left side of the toothed plate is fixedly connected to the outer surface of the vertical rod.

[0010] As a preferred embodiment of this utility model, a rubber ring is fixedly sleeved inside the outer surface of the extrusion plate, and the outer surface of the rubber ring is movably sleeved with the inside of the coupling agent bottle.

[0011] As a preferred embodiment of this utility model, a fixing ring is fixedly sleeved inside the outer surface of the coupling agent bottle, a fixing plate is fixedly installed at the bottom end of the outer surface of the fixing ring, and a circular ring is movably sleeved on the outer surface of the fixing ring.

[0012] As a preferred embodiment of this utility model, a first toothed ring is fixedly installed at the bottom end of the ring, and the interior of the first toothed ring is movably sleeved with the outer surface of the fixed ring.

[0013] As a preferred technical solution of this utility model, a fixing rod is fixedly installed at the bottom of the coupling agent bottle, and an arc-shaped block is fixedly installed at the bottom of the fixing rod. An arc-shaped groove is opened on the front of the arc-shaped block, and the interior of the arc-shaped groove is connected to the interior of the arc-shaped block. A rotating ring is movably sleeved inside the arc-shaped block.

[0014] As a preferred embodiment of this utility model, a rotating ring is fixedly sleeved inside the rotating ring, and a scraper is fixedly installed inside the rotating ring.

[0015] As a preferred technical solution of this utility model, an arc-shaped plate is fixedly installed at the top of the front of the fixing rod, and a first gear is movably connected to the bottom of the arc-shaped plate. The outer surface of the first gear extends into the interior of the arc-shaped block through an arc-shaped groove, and the outer surface of the first gear is movably connected to the interior of the arc-shaped groove.

[0016] As a preferred embodiment of this utility model, a second toothed ring is fixedly sleeved inside the outer surface of the rotating ring, and the outer surface of the second toothed ring meshes with the outer surface of the first gear.

[0017] As a preferred embodiment of this utility model, a rotating shaft is fixedly sleeved inside the first gear, and the top end of the rotating shaft passes through the bottom end of the arc-shaped plate and the fixed plate and extends to the top of the fixed plate.

[0018] As a preferred embodiment of this utility model, a second gear is fixedly sleeved on the top end of the rotating shaft, the bottom end of the second gear is movably connected to the top end of the fixed plate, and the outer surface of the second gear meshes with the outer surface of the first gear ring.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model, by setting a first spring, a squeezing block, a second spring, and a toothed plate, ensures that the moving block can only move up and down due to the limiting effect of the square block. When the pressing block moves downward through the moving rod, the pressing block will squeeze the outer surface of the toothed plate through the squeezing block. At this time, the toothed plate will drive the squeezing plate and rubber ring to move downward along the inside of the coupling agent bottle through the second spring. During this process, the bottom end of the squeezing plate will squeeze and push the coupling agent inside the coupling agent bottle. Subsequently, the coupling agent will drip onto the patient's skin through the vertical groove and the circular groove, thereby achieving the effect of quantitatively squeezing out the coupling agent.

[0021] 2. This utility model, by setting a first toothed ring, a second toothed ring, a first gear, and a second gear, achieves the following: since the first toothed ring and the second gear are meshed together, when the first toothed ring rotates, it will drive the second gear to rotate. At this time, the second gear will drive the first gear to rotate through the rotating shaft. Since the outer surface of the first gear is meshed with the outer surface of the second toothed ring, the second toothed ring will drive the rotating ring to rotate along the inside of the two arc-shaped blocks through the first gear. At this time, the rotating ring will drive the scraper to rotate through the rotating ring. Subsequently, the scraper will spread the coupling agent evenly during rotation, thereby achieving the effect of quickly and conveniently spreading the coupling agent evenly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4This is a cross-sectional view of the fixing block of this utility model;

[0026] Figure 5 This is a cross-sectional view of the rotating ring of this utility model;

[0027] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 1. Coupling agent bottle body; 2. Vertical groove; 3. Extrusion plate; 4. Vertical rod; 5. Circular plate; 6. Fixing block; 7. Square block; 8. First spring; 9. Moving block; 10. Moving rod; 11. Pressing block; 12. Circular rod; 13. Extrusion block; 14. Second spring; 15. Toothed plate; 16. Rubber ring; 17. Fixing ring; 18. Fixing plate; 19. Circular ring; 20. First toothed ring; 21. Fixing rod; 22. Arc-shaped block; 23. Arc-shaped groove; 24. Arc-shaped plate; 25. Rotating ring; 26. Rotating ring; 27. Scraper; 28. Second toothed ring; 29. ​​First gear; 30. Rotating shaft; 31. Second gear; 32. Circular groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 6 As shown, this utility model provides a coupling agent application device, comprising:

[0031] The coupling agent bottle body 1 has a vertical groove 2 at the bottom end, and the interior of the vertical groove 2 is connected to the interior of the coupling agent bottle body 1. A compression plate 3 is movably sleeved at the top of the interior of the coupling agent bottle body 1. Vertical rods 4 are fixedly installed on both the left and right sides of the top of the compression plate 3, and a circular plate 5 is fixedly installed at the top of the vertical rods 4.

[0032] The top of the fixing block 6 is fixedly connected to the bottom of the coupling agent bottle 1. The bottom of the fixing block 6 is provided with a circular groove 32, and the interior of the circular groove 32 is connected to the interior of the vertical groove 2.

[0033] The pressing mechanism is located at the top of the outer surface of the coupling agent bottle 1;

[0034] The pressing mechanism includes a square block 7. The left side of the square block 7 is fixedly connected to the top of the outer surface of the coupling agent bottle 1. A first spring 8 is fixedly installed at the bottom of the inside of the square block 7. A moving block 9 is fixedly installed at the top of the first spring 8. The outer surface of the moving block 9 is movably connected to the inside of the square block 7. A moving rod 10 is fixedly installed at the top of the moving block 9. The top of the moving rod 10 passes through the inside of the square block 7 and extends to the top of the square block 7. A pressing block 11 is fixedly installed at the top of the moving rod 10. A round rod 12 is fixedly installed on the right side of the inside of the pressing block 11. A squeezing block 13 is movably connected to the outer surface of the left end of the round rod 12. The outer surface of the squeezing block 13 is movably connected to the inside of the pressing block 11. A second spring 14 is fixedly installed on the right side of the squeezing block 13. The inside of the second spring 14 is movably connected to the outer surface of the round rod 12. The right side of the second spring 14 is fixedly connected to the inside of the pressing block 11. A toothed plate 15 is movably connected to the left side of the squeezing block 13. The left side of the toothed plate 15 is fixedly connected to the outer surface of the vertical rod 4.

[0035] When medical staff press the pressure block 11, due to the limiting effect inside the square block 7, the pressure block 11 will drive the moving block 9 to move downward through the moving rod 10. At this time, the first spring 8 will be in a compressed state. At the same time, the squeezing block 13 will move downward under the action of the pressure block 11. During this downward movement, the squeezing block 13 will squeeze and push the toothed plate 15. Due to the limiting effect inside the coupling agent bottle 1, the toothed plate 15 will drive the squeezing plate 3 to move downward along the inside of the coupling agent bottle 1 through the vertical rod 4. At this time, the coupling agent inside the coupling agent bottle 1 will move to the bottom of the fixed block 6 through the vertical groove 2 and the circular groove 32. When the medical staff releases the pressure block 11, Due to the elastic force of the first spring 8, the movement of the moving block 9 will have a good reset effect. At this time, the moving block 9 will drive the pressing block 11 to move upward through the moving rod 10. At this time, the pressing block 13 will be squeezed by the toothed plate 15 during the upward movement, causing the pressing block 13 to move to the right along the outer surface of the round rod 12. At this time, the second spring 14 will be in a compressed state. When the top of the moving block 9 contacts the top of the inside of the square block 7, the toothed plate 15 will release the squeezing action on the pressing block 13. Due to the elastic force of the second spring 14, the movement of the pressing block 13 will have a good reset effect. At this time, the pressing block 13 will move to the left under the action of the second spring 14 to reset.

[0036] Among them, a rubber ring 16 is fixedly sleeved inside the outer surface of the extrusion plate 3, and the outer surface of the rubber ring 16 is movably sleeved inside the coupling agent bottle body 1.

[0037] Since the rubber ring 16 is made of rubber, it will provide a good seal at the joint between the extrusion plate 3 and the inside of the coupling agent bottle 1. Furthermore, due to the design of the rubber ring 16, the friction between the extrusion plate 3 and the coupling agent bottle 1 will be increased, so that the extrusion plate 3 will not slide down the inside of the coupling agent bottle 1 due to gravity.

[0038] Among them, a fixing ring 17 is fixedly sleeved inside the outer surface of the coupling agent bottle 1, a fixing plate 18 is fixedly installed at the bottom of the outer surface of the fixing ring 17, and a circular ring 19 is movably sleeved on the outer surface of the fixing ring 17.

[0039] Because the inside of the ring 19 is movably fitted with the outer surface of the fixed ring 17, the ring 19 can rotate along the outer surface of the fixed ring 17.

[0040] The bottom end of the circular ring 19 is fixedly installed with a first toothed ring 20, and the inside of the first toothed ring 20 is movably sleeved with the outer surface of the fixed ring 17.

[0041] When the ring 19 rotates, the first toothed ring 20 will rotate along the outer surface of the fixed ring 17 under the drive of the ring 19.

[0042] Among them, a fixing rod 21 is fixedly installed at the bottom end of the coupling agent bottle 1, and an arc-shaped block 22 is fixedly installed at the bottom end of the fixing rod 21. An arc-shaped groove 23 is opened on the front side of the arc-shaped block 22, and the interior of the arc-shaped groove 23 is connected to the interior of the arc-shaped block 22. A rotating ring 25 is movably sleeved inside the arc-shaped block 22.

[0043] Because the outer surface of the rotating ring 25 is movably connected to the interior of the two arc-shaped blocks 22, the rotating ring 25 can rotate along the interior of the two arc-shaped blocks 22.

[0044] The rotating ring 25 is internally fitted with a rotating ring 26, and the rotating ring 26 is internally fitted with a scraper 27.

[0045] When the rotating ring 25 rotates, it will drive the scraper 27 to rotate through the rotating ring 26. Due to the design of the scraper 27, the coupling agent will be spread evenly when the scraper 27 rotates.

[0046] Among them, an arc-shaped plate 24 is fixedly installed on the top of the front of the fixed rod 21, and a first gear 29 is movably connected to the bottom of the arc-shaped plate 24. The outer surface of the first gear 29 extends into the interior of the arc-shaped block 22 through the arc-shaped groove 23, and the outer surface of the first gear 29 is movably connected to the interior of the arc-shaped groove 23.

[0047] Because the outer surface of the first gear 29 is movably connected to the inside of the arc-shaped groove 23, the first gear 29 can rotate inside the arc-shaped groove 23.

[0048] The rotating ring 25 has a second toothed ring 28 fixedly sleeved inside its outer surface, and the outer surface of the second toothed ring 28 meshes with the outer surface of the first gear 29.

[0049] Since the second gear ring 28 is meshed with the first gear 29, when the first gear 29 rotates, it will drive the second gear ring 28 to rotate. At this time, the entire rotating ring 25 will rotate under the drive of the second gear ring 28.

[0050] The first gear 29 is internally fitted with a rotating shaft 30. The top end of the rotating shaft 30 passes through the bottom end of the arc plate 24 and the fixed plate 18 and extends to the top of the fixed plate 18.

[0051] When the rotating shaft 30 rotates, the first gear 29 will rotate under the drive of the rotating shaft 30.

[0052] The top end of the rotating shaft 30 is fixedly sleeved with a second gear 31, the bottom end of the second gear 31 is movably connected to the top end of the fixed plate 18, and the outer surface of the second gear 31 is meshed with the outer surface of the first gear ring 20.

[0053] Since the outer surface of the first gear ring 20 meshes with the outer surface of the second gear 31, when the first gear ring 20 rotates, the second gear 31 will rotate under the drive of the first gear ring 20.

[0054] Working principle and usage process of this utility model:

[0055] First, medical staff place two arc-shaped blocks 22 on the patient's skin. Then, they press down on the pressing block 11. This causes the pressing block 11 to move the moving rod 10 and the moving block 9. Due to the internal design of the square block 7, the movement of the moving block 9 is limited, allowing it to move only up and down. During this downward movement, the pressing block 11 causes the moving block 9 and the moving rod 10 to move downwards. Simultaneously, the first spring 8 is compressed. At the same time, the pressing block 11 causes the squeezing block 13 to move downwards. The outer surface of the squeezing block 13 then squeezes and pushes the outer surface of the toothed plate 15 during this downward movement. The toothed plate 15 then moves the squeezing plate 3 and the circular plate 5 via the second spring 14. Because the inside of the coupling agent bottle 1 is movably connected to the outer surface of the squeezing plate 3, the squeezing plate 3 can move up and down along the inside of the coupling agent bottle 1. The squeezing plate 3 then causes the rubber ring 16 to move downwards along the inside of the coupling agent bottle 1. During this process, the bottom end of the squeezing plate 3 will... The coupling agent inside the bottle 1 is squeezed and pushed, and then the coupling agent falls onto the patient's skin through the vertical groove 2 and the circular groove 32, thus realizing the function of quantitatively squeezing out the coupling agent. When the bottom end of the pressing block 11 contacts the top end of the square block 7, the medical staff releases the pressing block 11. Due to the elastic force of the first spring 8, the moving block 9 will move upward under the drive of the first spring 8. At this time, the moving block 9 will drive the pressing block 11 to move upward through the moving rod 10. During this process, the outer surface of the squeezing block 13 will be squeezed and pushed by the outer surface of the toothed plate 15. At this time, the squeezing block 13 will move to the right along the outer surface of the circular rod 12. At this time, the second spring 14 will be in a compressed state. When the top end of the moving block 9 contacts the top end inside the square block 7 during the upward movement, the outer surface of the toothed plate 15 will release the squeezing and pushing action on the outer surface of the squeezing block 13. Due to the elastic force of the second spring 14, the squeezing block 13 will move to the left to reset under the drive of the second spring 14.

[0056] Subsequently, medical staff twisted the ring 19. Since the inside of the ring 19 is movably fitted with the outer surface of the fixed ring 17, the ring 19 will rotate along the outer surface of the fixed ring 17. Then, the first toothed ring 20 will rotate along the outer surface of the fixed ring 17 under the influence of the ring 19. Because the outer surface of the first toothed ring 20 meshes with the outer surface of the second gear 31, the second gear 31 will rotate under the influence of the first toothed ring 20. Subsequently, the second gear 31 will drive the first gear 29 to rotate via the rotating shaft 30. The outer surface of gear 29 meshes with the outer surface of the second toothed ring 28. At this time, the second toothed ring 28 will rotate under the drive of the first gear 29. Since the outer surface of the rotating ring 25 is respectively connected to the interior of the two arc-shaped blocks 22, the second toothed ring 28 will drive the rotating ring 25 to rotate along the interior of the two arc-shaped blocks 22. Then the rotating ring 25 will drive the scraper 27 to rotate through the rotating ring 26. At this time, the scraper 27 will spread the coupling agent on the patient's skin evenly during rotation, thus realizing the function of quickly and conveniently spreading the coupling agent evenly.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coupling agent application device characterized by comprising: The utility model relates to a coupling agent bottle body (1) bottom end is provided with vertical groove (2), vertical groove (2) inside is connected with the inside of coupling agent bottle body (1), the inside of coupling agent bottle body (1) top end movable sleeve coupling extrusion plate (3), the left and right sides of extrusion plate (3) top end are all fixedly installed with vertical rod (4), vertical rod (4) top end fixedly installed with round plate (5); Fixed block (6), the top of fixed block (6) is fixedly connected with the bottom end of coupling agent bottle body (1), the bottom of fixed block (6) is provided with circular groove (32), the inside of circular groove (32) is communicated with the inside of vertical groove (2); The pressing mechanism is arranged at the top of the outer surface of the coupling agent bottle body (1). Wherein, the pressing mechanism includes a square block (7), the left side of the square block (7) is fixedly connected with the top of the outer surface of the coupling agent bottle body (1), the bottom of the inside of the square block (7) is fixedly installed with a first spring (8), the top of the first spring (8) is fixedly installed with a moving block (9), the outer surface of the moving block (9) is movably sleeved with the inside of the square block (7), the top of the moving block (9) is fixedly installed with a moving rod (10), the top of the moving rod (10) penetrates through the inside of the square block (7) and extends to above the top of the square block (7), the top of the moving rod (10) is fixedly installed with a pressing block (11), the right side of the inside of the pressing block (11) is fixedly installed with a round rod (12), the outer surface of the left side of one end of the round rod (12) is movably sleeved with an extrusion block (13), the outer surface of the extrusion block (13) is movably sleeved with the inside of the pressing block (11), the right side of the extrusion block (13) is fixedly installed with a second spring (14), the inside of the second spring (14) is movably sleeved with the outer surface of the round rod (12), the right side of the second spring (14) is fixedly connected with the inside of the pressing block (11), the left side of the extrusion block (13) is movably connected with a toothed plate (15), the left side of the toothed plate (15) is fixedly connected with the outer surface of the vertical rod (4). The inside of the outer surface of the extrusion plate (3) is fixedly sleeved with a rubber ring (16), and the outer surface of the rubber ring (16) is movably sleeved with the inside of the coupling agent bottle body (1).

2. The coupling agent application device according to claim 1, characterized by: The inside of the outer surface of the coupling agent bottle body (1) is fixedly sleeved with a fixed ring (17), the bottom of the outer surface of the fixed ring (17) is fixedly installed with a fixed plate (18), and the outer surface of the fixed ring (17) is movably sleeved with a circular ring (19).

3. The coupling agent application device according to claim 1, characterized by: The bottom of the circular ring (19) is fixedly installed with a first toothed ring (20), and the inside of the first toothed ring (20) is movably sleeved with the outer surface of the fixed ring (17).

4. The coupling agent application device according to claim 3, characterized by: The bottom of the coupling agent bottle body (1) is fixedly installed with a fixed rod (21), the bottom of the fixed rod (21) is fixedly installed with an arc-shaped block (22), the front of the arc-shaped block (22) is provided with an arc-shaped groove (23), the inside of the arc-shaped groove (23) is communicated with the inside of the arc-shaped block (22), and the inside of the arc-shaped block (22) is movably sleeved with a rotating ring (25).

5. The coupling agent application device according to claim 1, wherein: ​ 6. A coupling agent application device according to claim 5, wherein: The inside of the rotating ring (25) is fixedly sleeved with a rotating ring (26), and the inside of the rotating ring (26) is fixedly installed with a scraper (27).

7. The coupling agent application device according to claim 5, wherein: The top end of the front surface of the fixed rod (21) is fixedly installed with an arc-shaped plate (24), the bottom end of the arc-shaped plate (24) is movably connected with a first gear (29), the outer surface of the first gear (29) extends to the inside of the arc-shaped block (22) through the arc-shaped groove (23), and the outer surface of the first gear (29) is movably connected with the inside of the arc-shaped groove (23).

8. The coupling agent application device according to claim 5, wherein: The outer surface of the rotating ring (25) is movably sleeved with a second gear ring (28), and the outer surface of the second gear ring (28) is meshedly connected with the outer surface of the first gear (29).

9. A coupling agent application device according to claim 8, characterized in that: The inside of the first gear (29) is fixedly sleeved with a rotating shaft (30), and the top end of the rotating shaft (30) penetrates through the bottom end of the arc-shaped plate (24) and the fixed plate (18) and extends above the top end of the fixed plate (18).

10. A coupling agent application device according to claim 9, wherein: The top end of the rotating shaft (30) is fixedly sleeved with a second gear (31), the bottom end of the second gear (31) is movably connected with the top end of the fixed plate (18), and the outer surface of the second gear (31) is meshedly connected with the outer surface of the first gear ring (20).

Images