CN209884713U

CN209884713U - Wearing type intermittent inflating and pressurizing device

Info

Publication number: CN209884713U
Application number: CN201920140466.XU
Authority: CN
Inventors: 顾朱飞; 盛荔; 朱昊; 缪辉琴; 李冲
Original assignee: Nantong Han Kewei Medical Technology Co Ltd
Current assignee: Nantong Han Kewei Medical Technology Co Ltd
Priority date: 2019-01-26
Filing date: 2019-01-26
Publication date: 2020-01-03
Anticipated expiration: 2029-01-26

Abstract

The utility model belongs to the technical field of medical equipment, and aims to provide a wearable intermittent inflation pressurization device, which has the technical scheme that the wearable intermittent inflation pressurization device comprises a host connecting plate, wherein a host device is connected on the host connecting plate in a sliding way, two T-shaped grooves are formed in the host connecting plate, the host device is convenient to be connected in a sliding way, a fixing mechanism is arranged at the joint of the host device and the host connecting plate, the host device and the host connecting plate can be fixedly clamped through the fixing mechanism, so that the connection between the host device and the host connecting plate is more stable, and the wearable intermittent inflation pressurization device can not be separated in the using process of a therapeutic; this kind of wearing formula intermittent type inflatable pressure device is connected through dismantling coating and host computer connecting plate, when needs to be changed the coating, can dismantle coating and host computer connecting plate, is connected new coating and host computer connecting plate again, makes the air wave pressure therapeutic instrument can normal use, has practiced thrift the resource, avoids extravagant.

Description

Wearing type intermittent inflating and pressurizing device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to wearing formula intermittent type inflating pressure device.

Background

Pressure therapy refers to a therapy in which pressure is applied to the limb to effect treatment of a disease. The working principle of the massage pillow is that the absorption of metabolic waste, inflammatory factors and pain-relieving factors in blood can be accelerated along with the acceleration of blood circulation through a passive and uniform massage effect. Can prevent muscular atrophy, enhance oxygen content of limbs, and is helpful for treating diseases caused by blood circulation disorder. The working mechanism of the pressure therapy is to improve the hydrostatic pressure of tissues and force venous blood and lymph to flow back; meanwhile, by increasing the hydrostatic pressure of the interstitial fluid to about five times of the normal condition, the effect of overcoming the internal pressure of capillary vessels and the osmotic pressure of colloid among tissues can be generated, and the interstitial fluid is promoted to flow back to veins and lymphatic vessels. The above mechanism has the effects of effectively increasing the blood discharge of veins, increasing the blood flow speed, enhancing the activity of a fibrinolytic system and stimulating the endogenous fibrinolytic activity. Currently, pressure therapy has been widely used clinically for edema after limb trauma, edema due to lymphatic reflux disorder, edema of stump after amputation, complex regional pain syndrome, venous stasis ulcer, prevention of deep vein thrombosis of lower limbs of patients who are bedridden for a long time or in passive positions after operation, and the like.

The air pressure therapeutic apparatus mainly forms the circulating pressure of limbs and tissues by sequentially and repeatedly inflating and deflating the multi-cavity air bags, evenly and orderly extrudes the far ends of the limbs and the near ends of the limbs, promotes the flow of blood and lymph and improves the microcirculation, accelerates the backflow of the tissue fluid of the limbs, is beneficial to preventing the formation of thrombus and the edema of the limbs, and can directly or indirectly treat a plurality of diseases related to the blood lymph circulation.

The existing air wave pressure therapeutic apparatus comprises a host device, a host connecting plate fixedly connected with the host device, a coating layer connected with the host connecting plate, and an air bag arranged in the coating layer, wherein an air pump, a three-way electromagnetic valve and a joint are arranged in the host device, a guide tube is connected on the host connecting plate, the air pump is electrically connected with the three-way electromagnetic valve, one end of the joint is connected with the air pump, the other end of the joint is connected with the guide tube, a connecting air nozzle is also arranged on the host connecting plate and is communicated with the air bag, the existing host device is fixedly connected with the host connecting plate, and the coating layer is also fixedly connected with the host connecting plate, after the air wave pressure therapeutic apparatus is used, the whole air wave pressure therapeutic apparatus needs to be discarded in order to prevent cross infection, the host device and the host connecting plate are usually discarded without any damage, can be used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wearing formula intermittent type inflating pressure device, it has convenient change, resources are saved's advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a wearable intermittent inflation and pressurization device comprises a host machine connecting plate, wherein a host machine device is connected onto the host machine connecting plate in a sliding manner, a coating layer is detachably connected to one side, away from the host machine device, of the host machine connecting plate, an air bag is arranged in the coating layer, a control structure body is arranged in the host machine device, the control structure body comprises an air pump fixedly connected with the inside of the host machine device, a three-way electromagnetic valve electrically connected with the air pump, a conversion joint connected with the air pump and a transition joint connected with the conversion joint, the three-way electromagnetic valve is fixedly connected into the host machine device body, the transition joint is connected with the host machine connecting plate, a vent pipe is fixedly connected onto the host machine connecting plate and is matched with the transition joint, a first air guide pipe is fixedly connected onto the host machine connecting plate and is, the air bag is characterized in that a second air duct is fixedly connected to the coating layer and communicated with the air bag, the second air duct is matched with the first air duct, an integrated circuit board and a touch screen are arranged in the host device, and the integrated circuit board is electrically connected with the touch screen.

Through adopting above-mentioned technical scheme, the operation touch-sensitive screen can input user's instruction, the operation of control therapeutic instrument, can be according to the treatment pressure of patient's actual conditions control air cavity, the treatment time, the gap time, wrap up the coating on the limbs, the air cavity of gasbag is aerifyd according to the pressure value of setting for to the air pump, realize the backlog to the limbs, deflate simultaneously after reaching the air cavity and reaching the pressure value, the circulation extrudees the limbs, thereby can realize the treatment to patient, can change host computer connecting plate or coating after different patients finish using, also can directly change the coating, can reduce the waste of resource, make the host computer connecting plate can used repeatedly after the disinfection, thereby can prevent patient's cross infection, keep the clean of therapeutic instrument.

Further setting: the host device is characterized in that a T-shaped groove is formed in the host connecting plate, a T-shaped block is fixedly connected to the host device, the T-shaped block is matched with the T-shaped groove in a sliding mode, and the number of the T-shaped block and the number of the T-shaped groove are two.

By adopting the technical scheme, the T-shaped block on the host device can be matched with the T-shaped groove in a sliding manner, so that the host device can be detached and installed together with the host connecting plate, and the host device can be connected with host connecting plates of different models, so that the host device is more universal.

Further setting: the host computer device comprises a host computer connecting plate, and is characterized in that a fixing mechanism is arranged between the host computer connecting plate and the host computer device, the fixing mechanism comprises a clamping groove formed in the host computer connecting plate, a supporting rod inserted in the clamping groove in a sliding manner, a clamping block fixedly connected with the host computer device, a groove formed in the clamping block, and a clamping rod inserted in the groove in a sliding manner, the clamping rod is fixedly connected with the groove through a first spring, one end of the first spring is fixedly connected into the inner wall of the groove, the other end of the first spring is fixedly connected with the clamping rod, and the clamping rod is matched with the supporting rod.

Through adopting above-mentioned technical scheme, when installation host computer device, the joint pole extends to the one end of keeping away from the recess under the effect of first spring, and the joint pole can with joint groove phase-match joint, make host computer device and host computer connecting plate be connected more stable, when dismantling host computer device, only need to offset the pole of moving, make the pole of moving offset the joint pole, the joint pole breaks away from with the joint groove mutually to can make host computer device and host computer connecting plate phase separation, the operation is convenient.

Further setting: and a second spring is arranged in the T-shaped groove, one end of the second spring is fixedly connected with the inner wall of the T-shaped groove, and the other end of the second spring is matched with the T-shaped block.

Through adopting above-mentioned technical scheme, seeing after the pole is moved to the support, the joint pole receives the pressure contraction, and certain pressure can be applyed to the host computer device to the second spring, makes the host computer device not receive dismantlement that can be quick spacing to make host computer device's dismantlement more convenient.

Further setting: the pushing rod is sleeved with a third spring, and the third spring is limited and fixed through a step plate.

Through adopting above-mentioned technical scheme, the setting of third spring can make to support and move the quick return of pole, supports to move the pole and also can not take place the phenomenon of rocking, can have certain support when supporting to move the pole, the dead phenomenon of card can not appear to can make host computer device and the smooth realization of host computer connecting plate dismantle.

Further setting: the coating layer is provided with a through hole, a connecting ring is fixedly connected in the through hole, the coating layer is detachably connected with the host connecting plate through a bolt, and the bolt is inserted in the connecting ring in a threaded manner.

Through adopting above-mentioned technical scheme, can realize dismantling and installing coating and host computer connecting plate through the bolt, make the coating more convenient with being connected of host computer connecting plate, also can be more convenient realize dismantling the change to the coating.

Further setting: the cladding in-situ fixedly connected with first magnet, fixedly connected with second magnet on the host computer connecting plate, first magnet and second magnet match the setting.

Through adopting above-mentioned technical scheme, the setting of first magnet and second magnet can make things convenient for the location and the fixing of coating and host computer connecting plate, makes the installation more accurate to the coating, also can make the coating more stable with being connected of host computer connecting plate.

Further setting: the first air duct outside fixedly connected with first rubber ring, second air duct inner wall fixedly connected with second rubber ring, first rubber ring and second rubber ring match the joint setting.

Through adopting above-mentioned technical scheme, when with first guide tube and second guide tube assorted, first rubber ring can with second rubber ring phase-match joint, realize the connection of first guide tube and second guide tube fixed, the setting of rubber material can make the connection between first guide tube and the second guide tube more stable, sealing performance is better to prevent gas leakage.

Further setting: the main machine connecting plate is provided with a fixed concave ring, a first magnetic ring is fixedly connected in the fixed concave ring, the end part of the second air duct is fixedly connected with a second magnetic ring, the end part of the second magnetic ring is fixedly connected with a sealing rubber sheet, and the first magnetic ring and the second magnetic ring are arranged in a matched mode.

By adopting the technical scheme, when the first guide tube and the second guide tube are installed, the first magnetic ring can attract the second magnetic ring, so that the first magnetic ring and the second magnetic ring act on the sealing rubber sheet, the sealing performance between the first guide tube and the second guide tube is better, air leakage is prevented, and the normal use of the air bag is ensured.

To sum up, the utility model discloses following beneficial effect has:

1. after different patients use the therapeutic apparatus, the host machine connecting plate or the coating layer can be replaced, and the coating layer can also be directly replaced, so that the waste of resources can be reduced, and the host machine device and the host machine connecting plate can be reused;

2. the host device and the host connecting plate can be clamped and fixed when clamped by the fixing mechanism, so that the host device and the host connecting plate can be more firmly installed and fixed;

3. the coating layer is detachably connected with the host connecting plate through bolts, so that the coating layer is simple and convenient to replace;

4. the arrangement of the magnetic ring and the rubber ring ensures that the connection sealing performance of the first air duct and the second air duct is stronger, and the normal use of the coating layer can be ensured.

Drawings

FIG. 1 is a schematic view showing the overall structure of a pressurizing apparatus;

FIG. 2 is a schematic diagram of a structure for embodying the interior of a host device;

FIG. 3 is a schematic view of an overall structure for embodying a fixing mechanism between a host device and a host connection board;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

FIG. 5 is an exploded view of a structure embodying a cladding layer and a host connection board;

FIG. 6 is an enlarged schematic view of the structure shown at B in FIG. 5;

FIG. 7 is an enlarged schematic view of the structure at C in FIG. 5;

FIG. 8 is a schematic bottom view of a connecting board for a host computer;

fig. 9 is a schematic structural view of a cladding layer in the second embodiment.

In the figure, 1, a host connecting plate; 2. a host device; 201. an integrated circuit board; 202. a touch screen; 3. a coating layer; 4. an air bag; 5. a control structure body; 51. an air pump; 52. a three-way electromagnetic valve; 53. a crossover sub; 54. a transition joint; 6. a breather pipe; 7. a first air duct; 8. a second air duct; 9. a T-shaped groove; 10. a T-shaped block; 11. a fixing mechanism; 111. a clamping groove; 112. pushing the rod; 113. a clamping block; 114. a groove; 115. a clamping and connecting rod; 116. a first spring; 12. a second spring; 13. a third spring; 14. a step plate; 15. a through hole; 16. a connecting ring; 18. a bolt; 19. a first magnet; 20. a second magnet; 21. a first rubber ring; 22. a second rubber ring; 23. a first magnetic ring; 24. a second magnetic ring; 25. and sealing the rubber sheet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows: the utility model provides a wearing formula intermittent type inflating pressure device, as shown in figure 1, including host computer connecting plate 1, sliding connection has host computer device 2 on host computer connecting plate 1, two T type grooves 9 have been seted up on host computer connecting plate 1, make things convenient for host computer device 2's sliding connection, be provided with fixed establishment 11 at host computer device 2 and host computer connecting plate 1 junction, can be with host computer device 2 and host computer connecting plate 1 fixed joint through fixed establishment 11, make host computer device 2 and host computer connecting plate 1 be connected more stable, in-process that the therapeutic instrument used can not take place to break away from, be provided with touch-sensitive screen 202 on host computer device 2, can operate the therapeutic instrument through touch-sensitive screen 202, host computer device 2 was kept away from to host computer connecting plate 1 one side dismantlement is connected with coating 3, coating 3 wraps up.

As shown in fig. 2, a control structure body 5 is arranged in the host device 2, the control structure body 5 includes an air pump 51 fixedly connected with the inside of the host device 2, a three-way electromagnetic valve 52 electrically connected with the air pump 51, a conversion joint 53 connected with the air pump 51, and a transition joint 54 connected with the conversion joint 53, the number of the air pumps 51 can be three, the air pumps 51 can be alternatively operated to match specific conditions, so that the treatment effect is better, the three-way electromagnetic valve 52 is fixedly connected in the host device 2 body, the transition joint 54 is connected with the host connection board 1, the host connection board 1 is fixedly connected with a vent pipe 6, the vent pipe 6 is matched with the transition joint 54, an integrated circuit board 201 is arranged in the host device 2, the integrated circuit board 201 is electrically connected with a touch screen 202, after the host device 2 is connected with the host connection board 1, the control structure body 5 can be operated through a switch on the display screen, the air pump 51 is operated to inflate, the air flow flows to the transition joint 54 from the conversion joint 53 and then flows to the vent pipe 6 from the transition joint 54, and the patient is treated in the air bag 4 flowing to the coating layer 3 (refer to fig. 5), two T-shaped blocks 10 are fixedly connected to the host device 2, and the T-shaped blocks 10 are arranged in a sliding matching mode with the T-shaped grooves 9.

As shown in fig. 3 and 4, a fixing mechanism 11 is disposed between the host connecting plate 1 and the host device 2, the fixing mechanism 11 includes a clamping groove 111 formed on the host connecting plate 1, a pushing rod 112 inserted into the clamping groove 111 in a sliding manner, a clamping block 113 fixedly connected with the host device 2, a groove 114 formed on the clamping block 113, and a clamping rod 115 inserted into the groove 114 in a sliding manner, the clamping rod 115 is fixedly connected with the groove 114 through a first spring 116, one end of the first spring 116 is fixedly connected with the inner wall of the groove 114, the other end is fixedly connected with the clamping rod 115, the clamping rod 115 is matched with the pushing rod 112, a second spring 12 is disposed in the T-shaped groove 9, one end of the second spring 12 is fixedly connected with the inner wall of the T-shaped groove 9, the other end is matched with the T-shaped block 10, a third spring 13 is sleeved on the pushing rod 112, the third spring 13 is limited and fixed through a step plate 14, when the end of the host device 2 is mounted to abut against the host connecting plate 1, the engaging block 113 is matched with the engaging groove 111, the engaging rod 115 is attached to the end of the abutting rod 112 under the elastic potential energy of the first spring 116, so that the engaging block 113 can engage with the engaging groove 111, and the host device 2 is fixed, when the host device 2 needs to be detached, the abutting plate is abutted, the abutting plate is pressed to abut against the engaging rod 115, and under the elastic potential energy of the second spring 12, the engaging rod 115 is separated from the engaging groove 111, so that the host device 2 can be detached from the host connecting plate 1, and the host connecting plate 1 can be conveniently replaced after being used.

As shown in fig. 5, a second air duct 8 is fixedly connected to the coating layer 3, a balloon 4 is arranged in the coating layer 3, the second air duct 8 is communicated with the balloon 4, and a first magnet 19 is fixedly connected to the interior of the coating layer 3.

As shown in fig. 6, a first air duct 7 is fixedly connected to the host connecting plate 1, a first rubber ring 21 is fixedly connected to the outer side of the first air duct 7, the first air duct 7 is communicated with one end of the air duct 6, which is far away from the host device 2, a fixing concave ring is arranged on the host connecting plate 1, a first magnetic ring 23 is fixedly connected to the fixing concave ring, when the coating layer 3 is connected with the host connecting plate 1, the first air duct 7 is communicated with the second air duct 8, so that air flow can flow into the air bag 4 from the second air duct 8 to treat a patient.

As shown in fig. 7, the inner wall of the second air duct 8 is fixedly connected with a second rubber ring 22, the first rubber ring 21 and the second rubber ring 22 are matched and clamped, when the first air duct 7 is connected with the second air duct 8, the first rubber ring 21 and the second rubber ring 22 can be connected to have better sealing performance, and the sealing performance of an air path is ensured, the end part of the second air duct 8 is fixedly connected with a second magnetic ring 24, the end part of the second magnetic ring 24 is fixedly connected with a sealing rubber sheet 25, the first magnetic ring 23 and the second magnetic ring 24 are matched and arranged, the sealing rubber sheet 25 can be clamped tightly under the action of the first magnetic ring 23 and the second magnetic ring 24, so that the connection between the first air duct 7 and the second air duct 8 has better sealing performance.

As shown in fig. 8, the second magnet 20 is fixedly connected to the host connecting plate 1, the first magnet 19 is matched with the second magnet 20, and when the coating layer 3 is installed, the first magnet 19 can attract the second magnet 20, so that the coating layer 3 and the host connecting plate 1 can be positioned, and the installation is convenient.

Example two: a wearable intermittent inflation and pressurization device is shown in fig. 9, and is different from the first embodiment in that a through hole 15 is formed in a coating layer 3, a connecting ring 16 is fixedly connected in the through hole 15, a bolt 18 is inserted into the connecting ring 16 and a host connecting plate 1, more than three through holes 15, connecting rings 16 and bolts 18 can be arranged, connection is firmer, and the bolts 18 are made of plastic materials such as PET.

The specific working process is as follows: the operation touch-sensitive screen 202 can input user's instruction, the operation of control therapeutic instrument, can be according to patient's actual conditions control air cavity's treatment pressure, treatment time, the gap time, wrap up coating 3 on the limbs, air pump 51 is aerifyd for the air cavity of gasbag 4 according to the pressure value of setting for, the realization is to the backlog of limbs, it is simultaneously gassing when reaching the air cavity and reaching the pressure value, the circulation extrudees the limbs, thereby can realize the treatment to patient, can change host computer connecting plate 1 or coating 3 after different patients finish using.

When the host connecting plate 1 needs to be disassembled, the abutting plate is pressed to abut against the clamping rod 115, the clamping rod 115 is separated from the clamping groove 111 under the elastic potential energy of the second spring 12, the host device 2 and the host connecting plate 1 can be disassembled, and when the coating layer 3 needs to be disassembled, the bolt 18 is disassembled to realize the separation of the coating layer 3 and the host connecting plate 1.

The host connecting plate 1 and the host device 2 can be sterilized and then used continuously, the coating layer 3 is fixedly connected with the host connecting plate 1 through the bolt 18, the T-shaped block 10 on the host device 2 is matched with the T-shaped groove 9, when the end of the host device 2 is installed to abut against the host connecting plate 1, the clamping block 113 is matched with the clamping groove 111, the clamping rod 115 is attached to the end of the abutting rod 112 under the elastic potential energy of the first spring 116, and therefore the clamping block 113 can be clamped with the clamping groove 111 to fix the host device 2.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a pressure device is aerifyd to wearing formula intermittent type, includes host computer connecting plate (1), its characterized in that: the air bag type air bag control device is characterized in that a host device (2) is connected onto the host connecting plate (1) in a sliding mode, a coating layer (3) is detachably connected to one side, away from the host device (2), of the host connecting plate (1), an air bag (4) is arranged in the coating layer (3), a control structure body (5) is arranged in the host device (2), the control structure body (5) comprises an air pump (51) fixedly connected with the interior of the host device (2), a three-way electromagnetic valve (52) electrically connected with the air pump (51), a conversion joint (53) connected with the air pump (51) and a transition joint (54) connected with the conversion joint (53), the three-way electromagnetic valve (52) is fixedly connected into the host device (2), the transition joint (54) is connected with the host connecting plate (1), and an air pipe (6), breather pipe (6) and transition joint (54) phase-match set up, the first air duct of fixedly connected with (7) is gone up in host computer connecting plate (1), the one end of host computer device (2) is kept away from with breather pipe (6) in first air duct (7) is linked together, fixedly connected with second air duct (8) is gone up in coating (3), second air duct (8) are linked together with gasbag (4), second air duct (8) and first air duct (7) phase-match set up, be provided with integrated circuit board (201) and touch-sensitive screen (202) in host computer device (2), integrated circuit board (201) and touch-sensitive screen (202) electric connection.

2. A wearable intermittent inflation and pressurization device according to claim 1, characterized in that: t type groove (9) have been seted up on host computer connecting plate (1), fixedly connected with T type piece (10) on host computer device (2), T type piece (10) and T type groove (9) slide to match the setting, T type piece (10) and T type groove (9) all are provided with two.

3. A wearable intermittent inflation and pressurization device according to claim 2, characterized in that: the host computer connecting plate is characterized in that a fixing mechanism (11) is arranged between the host computer connecting plate (1) and the host computer device (2), the fixing mechanism (11) comprises a clamping groove (111) formed in the host computer connecting plate (1), a butting rod (112) inserted into the clamping groove (111) in a sliding mode, a clamping block (113) fixedly connected with the host computer device (2), a groove (114) formed in the clamping block (113), and a clamping rod (115) inserted into the groove (114) in a sliding mode, the clamping rod (115) is fixedly connected with the groove (114) through a first spring (116), one end of the first spring (116) is fixedly connected into the inner wall of the groove (114), the other end of the first spring is fixedly connected with the clamping rod (115), and the clamping rod (115) is matched with the butting rod (112).

4. A wearable intermittent inflation and pressurization device according to claim 3, characterized in that: and a second spring (12) is arranged in the T-shaped groove (9), one end of the second spring (12) is fixedly connected with the inner wall of the T-shaped groove (9), and the other end of the second spring is matched with the T-shaped block (10).

5. A wearable intermittent inflation and pressurization device according to claim 3, characterized in that: the pushing rod (112) is sleeved with a third spring (13), and the third spring (13) is limited and fixed through a step plate (14).

6. A wearable intermittent inflation and pressurization device according to claim 1, characterized in that: the coating layer (3) is provided with a through hole (15), a connecting ring (16) is fixedly connected in the through hole (15), the coating layer (3) is detachably connected with the host connecting plate (1) through a bolt (18), and the bolt (18) is inserted in the connecting ring (16) in a threaded manner.

7. The wearable intermittent inflation and pressurization device of claim 6, wherein: the inner fixed connection of the coating layer (3) is provided with a first magnet (19), the host connecting plate (1) is provided with a second magnet (20), and the first magnet (19) is matched with the second magnet (20).

8. The wearable intermittent inflation and pressurization device of claim 6, wherein: first air duct (7) outside fixedly connected with first rubber ring (21), second air duct (8) inner wall fixedly connected with second rubber ring (22), first rubber ring (21) and second rubber ring (22) match the joint setting.

9. A wearable intermittent inflation and pressurization device according to claim 8, characterized in that: the main engine connecting plate is characterized in that a fixed concave ring is arranged on the main engine connecting plate (1), a first magnetic ring (23) is fixedly connected in the fixed concave ring, a second magnetic ring (24) is fixedly connected at the end part of the second air duct (8), a sealing rubber sheet (25) is fixedly connected at the end part of the second magnetic ring (24), and the first magnetic ring (23) and the second magnetic ring (24) are arranged in a matching mode.