CN216417256U

CN216417256U - Multi-functional intracardiac branch of academic or vocational study radial artery haemostat

Info

Publication number: CN216417256U
Application number: CN202122528001.1U
Authority: CN
Inventors: 李娜; 周佳莉
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-05-03
Anticipated expiration: 2031-10-20

Abstract

The application relates to the technical field of medical equipment, in particular to a multifunctional cardiology department radial artery hemostat. The fixing plate comprises a fixing plate, wherein a first annular belt and a second annular belt are connected to two ends of the fixing plate respectively, and a hollow column is further arranged on the fixing plate. It also comprises a blood detection sensor, an alarm, a battery seat and a battery; the blood detection sensor is positioned below the hollow column and used for detecting whether blood seeps or not; the alarm is positioned on the fixing plate and is connected with the blood detection sensor; the battery seat is positioned on the fixing plate; the battery is positioned on the battery seat and is connected with the blood detection sensor and the alarm. The utility model discloses a multi-functional intracardiac branch of academic or vocational study radial artery haemostat to solve in the correlation technique whether unable perception radial artery department of radial artery haemostat oozes blood, do not possess and remind alarm function, easily cause the potential safety hazard, and the clitellum damages the back, need change whole radial artery haemostat, cause the wasting of resources, improve the problem of patient's the cost of seeking medical advice.

Description

Multi-functional intracardiac branch of academic or vocational study radial artery haemostat

Technical Field

The application relates to the technical field of medical equipment, in particular to a multifunctional cardiology department radial artery hemostat.

Background

At present, in the treatment means of coronary heart disease in the modern cardiovascular department, the operation is often performed by puncturing the radial artery. After puncture of the radial artery, the radial artery catheterization needs to be removed, and conventionally, the radial artery catheterization is removed after the radial artery catheterization is pressurized for a period of time by a radial artery hemostat after the radial artery catheterization is removed. The main principle of the radial artery hemostat is that the blood leakage is prevented by a device capable of adjusting the tightness.

In the related technology, the major part of the radial artery hemostat is a disposable radial artery hemostasis compressor, which comprises a pressurizing plate, a pressurizing knob, an elastic bandage and a buckling belt, and the using method comprises the following steps: the sheath tube is pulled out by moderate pressurization with hands, the tourniquet is tightened by pressurization, and the knob is adjusted until the puncture point does not bleed.

However, the radial artery hemostat is to be removed after being used for a period of time, and cannot sense whether blood seeps from the radial artery, the radial artery hemostat does not have a timing reminding alarm function, so that some potential safety hazards such as overlong hemostasis time or blood seeps after being used are easily caused.

Disclosure of Invention

The embodiment of the application provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat to solve whether the unable perception radial artery department of current radial artery haemostat oozes blood among the correlation technique, do not possess and remind alarm function, easily cause some potential safety hazards behind the hemostasis time overlength, and the clitellum damages the back, need change whole haemostat, cause the waste of resource easily, improve patient's the problem of the cost of seeking medical advice.

In order to achieve the above object, the utility model provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat, include:

the fixing plate is characterized in that two ends of the fixing plate are respectively connected with a first annular belt and a second annular belt, and a hollow column is further arranged on the fixing plate;

a blood detection sensor located below the hollow column and used for detecting whether blood seeps;

the alarm is positioned on the fixing plate and connected with the blood detection sensor, and is used for giving an alarm when the blood detection sensor detects the oozing of blood and giving an alarm when the set hemostasis time is reached;

the battery seat is positioned on the fixing plate;

and the battery is positioned on the battery seat and is connected with the blood detection sensor and the alarm.

In some embodiments, the hollow column has a compression assembly therein, the compression assembly comprising:

the stud is screwed inside the hollow column through the internal thread of the hollow column;

the fixing block is connected below the stud;

the telescopic rod is connected below the fixed block;

and the top end of the pressing plate is connected to the bottom of the telescopic rod, and the bottom end of the pressing plate is connected with the blood detection sensor.

the fixing block is positioned below the stud;

the telescopic rod is connected below the fixed block;

the top end of the pressing plate is connected to the bottom of the telescopic rod, and the bottom end of the pressing plate is connected with the blood detection sensor;

and the spring is sleeved on the telescopic rod, and the bottom of the spring is fixed inside the hollow column.

In some embodiments, a shield is attached to the top of the hollow post.

In some embodiments, a rotating handle is attached to the top end of the stud.

In some embodiments, the first loop is length-adjustably connected to the second loop.

In some embodiments, the first endless belt is provided with a plurality of limiting through holes, and the second endless belt is provided with limiting clamping blocks matched with the limiting through holes; or, a limiting clamping block is arranged on the first annular belt, and a plurality of limiting through holes matched with the limiting clamping block are arranged on the second annular belt.

In some embodiments, a light strip is disposed on the fixing plate, and the light strip is connected to the battery.

In some embodiments, the first and second bands are removably coupled to the fixation plate.

In some embodiments, the fixing plate has grooves on both sides thereof, and the first and second bands have protrusions that fit the grooves.

The beneficial effect that technical scheme that this application provided brought includes:

1. in specific working process, when the blood detection sensor detects the radial artery position oozing blood, the alarm sends out the police dispatch newspaper, in time reminds medical staff to handle, avoids the bleeding too much, brings the life potential safety hazard for the patient.

2. In a specific working process, the alarm mounted on the upper portion of the fixing plate is set for specific time, when the alarm presets hemostasis time, the alarm gives an alarm, and potential safety hazards caused by overlong hemostasis time are avoided.

The embodiment of the application provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat, because increase battery tray and battery on traditional radial artery haemostat's basis, the timing alarm, blood detects the sensor, the battery is timing alarm and blood detection sensor energy supply, wherein, the timing alarm links to each other with blood detection sensor, to the perception of oozing the blood with the blood detection sensor that contacts at radial artery puncture position, decide whether the alarm sends the police dispatch newspaper, make medical personnel in time react, perhaps, set up predetermined time to the alarm, arrive when predetermined time, the alarm sends out the police dispatch newspaper, make medical personnel react. Therefore, the problem that the radial artery hemostat does not have a reminding alarm function and is easy to cause some potential safety hazards after the hemostasis time is too long can be solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a front view of a multifunctional cardiology department radial artery hemostat provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a fixing plate of a multifunctional cardiology department radial artery hemostat according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first annulus of a multifunctional cardiology department radial artery hemostat according to an embodiment of the present application;

fig. 4 is a schematic cross-sectional structural view of a hollow column of a multifunctional cardiology department radial artery hemostat provided in an embodiment of the present application.

In the figure: 1. a fixing plate; 10. a groove; 11. a light strip; 2. a first endless belt; 20. a limiting through hole; 21. a bump; 3. a second endless belt; 30. a limiting clamping block; 4. a battery holder; 40. a battery; 5. an alarm; 6. a hollow column; 60. a shield; 61. a compression assembly; 611. rotating the handle; 612. a stud; 613. a fixed block; 614. a spring; 615. a telescopic rod; 616. pressing a plate; 617. a blood detection sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat, it can solve among the correlation technique whether unable perception radial artery department of current radial artery haemostat oozes the blood, and after some potential safety hazards and the clitellum that lead to after the radial artery haemostat does not possess warning alarm function takes place hemostasis time overlength easily damage, will change whole root hemostasis compressor, cause the waste of resource easily, improve patient's the problem of the cost of seeking medical advice.

Referring to fig. 1 to 4, the utility model provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat, including fixed plate 1, fixed plate 1 both ends are connected with first clitellum 2 and second clitellum 3 respectively, still are equipped with hollow post 6 on the fixed plate 1. It also includes blood detection sensor 617, alarm 5, battery holder 4 and battery 40; wherein, the blood detecting sensor 617 is located below the hollow column 6, and is used for detecting whether blood seeps; the alarm 5 is positioned on the fixing plate 1 and connected with the blood detection sensor 617, and the alarm 5 is used for giving an alarm when the blood detection sensor 617 detects the oozing blood and giving an alarm when the set hemostasis time is reached; the battery seat 4 is positioned on the fixing plate 1; the battery 40 is located on the battery holder 4 and is connected to the blood detection sensor 617 and the alarm 5.

The multifunctional cardiology department radial artery hemostat provided by the embodiment of the application comprises a battery 40, an alarm 5 and a blood detection sensor 617, wherein the battery 40 provides electric energy for the alarm 5 and the blood detection sensor 617, the alarm 5 is connected with the blood detection sensor 617, the blood detection sensor 617 senses whether blood seeps from a wound of a puncture part, and if the blood seeps, the alarm 5 gives an alarm to enable medical staff to make a response; or, the alarm 5 is set with the preset hemostasis time, when the preset time is up, the alarm 5 gives an alarm to remind medical staff to respond in time, and therefore the problems that the radial artery hemostat in the related technology does not have the functions of reminding and alarming, cannot grasp the situation in time and is easy to cause potential safety hazards can be solved.

Specifically, as shown in fig. 1, a first annular belt 2 and a second annular belt 3 are respectively fixed at two ends of a fixing plate 1 along the same linear direction of the fixing plate 1, and a battery holder 4, an alarm 5 and a hollow column 6 are connected to the fixing plate 1; alternatively, the battery holder 4 and the alarm 5 can be embedded in the fastening plate 1. In some embodiments, a hollow post 6 extends through the fixation plate. Preferably, the fixing plate 1 is a plate bent inward with some curvature, which can be adapted to the curvature of the wrist of a person to form a better compression effect. Wherein, the straight line direction that battery tray 4, alarm 5 and hollow post 6 can be connected along the clitellum distributes, also can irregularly distributed, all is within the utility model discloses a within the protection scope.

In one of them embodiment, the less button cell of volume is selected for use to battery 40, can the minimize shared space on the one hand, and on the other hand button cell's weight is lighter, can avoid this multi-functional intracardiac branch of academic or vocational study radial artery haemostat to cause the burden to patient's arm in the use, influences hemostatic effect.

In some preferred embodiments, as shown in fig. 4, the hollow column 6 has a compression assembly 61 inside, and the compression assembly 61 comprises: stud 612, fixing block 613, telescopic rod 615, pressure plate 616 and blood detection sensor 617.

The stud 612 is screwed inside the hollow column 6 through the internal thread of the hollow column 6, the fixing block 613 is connected below the stud 612, the telescopic rod 615 is connected below the fixing block 613, the top end of the pressing plate 616 is connected to the bottom of the telescopic rod 615, and the bottom end of the pressing plate is connected with the blood detection sensor 617.

Specifically, the hollow column 6 has an internal thread inside which is adapted to the stud 612, the fixing block 613 is fixedly connected below the stud 612, and in the use process, the rotation of the stud 612 drives the fixing block 613, the telescopic rod 615 and the pressing plate 616 to move up and down. The middle position of the junction of the bottom of the hollow column 6 and the fixing plate 1 is provided with a through hole, and the other end of the telescopic rod 615 movably penetrates through the through hole in the fixing plate 1.

In some preferred embodiments, as shown in fig. 4, the hollow column 6 has a compression assembly 61 inside, and the compression assembly 61 comprises: stud 612, fixing block 613, telescopic rod 615, pressure plate 616, blood detection sensor 617 and spring 614.

The stud 612 is screwed in the hollow column 6 through the internal thread of the hollow column 6, the fixing block 613 is connected below the stud 612, the telescopic rod 615 is connected below the fixing block 613, the top end of the pressing plate 616 is connected to the bottom of the telescopic rod 615, and the bottom end of the pressing plate is connected with the blood detection sensor 617; the spring 614 is sleeved on the telescopic rod 615, and the bottom of the spring is fixed inside the hollow column 6.

Specifically, the hollow column 6 is internally provided with internal threads matched with the stud 612, the fixing block 613 is attached below the stud 612, the stud 612 moves downwards and drives the fixing block 613 attached to the bottom of the stud to move downwards in the using process, the fixing block 613 moves downwards and extrudes the spring 614, and the telescopic rod 615 and a pressing plate 616 connected to the bottom of the telescopic rod are driven to press the bleeding part of the patient, so that the bleeding stopping effect is achieved; a blood detection sensor 617 is embedded in the bottom outer wall of the pressure plate 616 for detecting bleeding at the wound site.

It should be noted that the bottom end of the hollow column 6 is closed, a through hole for the telescopic rod 615 to move is formed in the through hole, the telescopic rod 615 is sleeved with the spring 614, and the diameter of the spring 614 is smaller than that of the fixed block; or, the bottom end of the hollow column 6 is not closed, the spring 614 adopts a structure with a narrow upper part and a wide lower part, the diameter of the upper end of the spring 614 is smaller than that of the fixed block 613, the diameter of the lower end of the spring 614 is equal to that of the inner wall of the hollow column 6, and meanwhile, the lower edge of the spring 614 is fixedly connected with the lower edge of the inner wall of the hollow column 6.

In some preferred embodiments, as shown in figures 1, 2 and 4, a shroud 60 is attached to the top of the hollow column 6. Specifically, the outer side of the top end of the hollow column 6 is externally threaded, and the shield 60 is threadedly coupled to the hollow column 6. The shield 60 can effectively prevent the hollow column 6 from being affected by external collision, damage and manual misoperation.

In some preferred embodiments, referring to FIG. 4, a rotatable knob 611 is attached to the top of stud 612. Specifically, the rotating handle 611 is flat and fits on the top end of the stud 612; meanwhile, the diameter of the rotating handle 611 at the horizontal plane is larger than the inner diameter of the stud 612 and smaller than the outer diameter of the stud 612, so as to ensure that the rotating handle 611 is also within the protection range of the shield 60. It should be noted that the cross section of the rotating handle 611 in the horizontal direction may be circular, or may be rectangular or polygonal.

In some preferred embodiments, the first endless belt 2 is adjustably connected to the second endless belt 3. Specifically, the first loop band 2 and the second loop band 3 may be connected by a hook and loop fastener or a snap hole. The adjustable connection mode can adapt to the arms of different patients, and the fixation of the hemostat is realized.

In some preferred embodiments, referring to fig. 1 and 3, the first endless belt 2 is provided with a plurality of limiting through holes 20, and the second endless belt 3 is provided with a limiting fixture block 30; or, the first ring belt 2 is provided with a limiting fixture block 30, and the second ring belt 3 is provided with a plurality of limiting through holes.

Specifically, the limiting through holes 20 are matched with the limiting clamping blocks 30, the number of the limiting clamping blocks 30 is less than that of the limiting through holes 20, and the different combination modes of the limiting clamping blocks 30 and the limiting through holes 20 can be used for realizing the adaptation to the arms with different thicknesses of the patient, so that the hemostat can be stably and firmly fixed at the bleeding position of the patient.

In some preferred embodiments, as shown in fig. 2, a light strip 11 is provided on the fixing plate 1, and the light strip 11 is connected to the battery 40. Specifically, the light strip 11 may be embedded at an edge or a corner of the fixing plate 1, or may be disposed on the surface of the fixing plate 1. The lamp area 11 can make things convenient for medical staff to carry out real-time supervision to the radial artery haemostat at night during operation, also can solve battery 40 and whether normally have an electricity, guarantees radial artery haemostat normal operating.

In some preferred embodiments, the first and second

endless belts

2, 3 are detachably connected to the fixing plate 1. After this multi-functional intracardiac branch of academic or vocational study radial artery haemostat accomplished the use, change fixed plate 1, first clitellum 2 can used repeatedly with second clitellum 3 after the disinfection, need not change whole haemostat, and the resource obtains cyclic utilization, also can reduce patient's cost of seeking medical advice.

In some preferred embodiments, the fixing plate 1 is provided with grooves 10 at two sides connecting with the first and second

endless belts

2, 3, the first and second

endless belts

2, 3 are provided with protrusions 21 at the connection with the fixing plate 1, and the protrusions 21 are matched with the grooves 10. Specifically, a racket-shaped groove 10 is formed at the joint of the fixing plate 1, which is connected with the first annular belt 2 and the second annular belt 3, a lug 21 structure is arranged on the annular belt, and the first annular belt 2 and the second annular belt 3 are matched with the groove 10 on the fixing plate 1 through the lug 21, so that the purpose of fixing together is achieved.

In this embodiment, referring to fig. 1 to 3, the left and right side walls of the fixing plate 1 are sequentially and movably connected with a first girdle 2 and a second girdle 3, the connecting ends of the first girdle 2 and the second girdle 3 with the fixing plate 1 are both fixedly connected with racket-shaped bumps 21, and the racket-shaped bumps 21 connected with the side walls of the first girdle 2 and the second girdle 3 are sequentially and movably clamped in corresponding racket-shaped grooves 10 of the left and right side walls of the fixing plate 1, so as to facilitate the installation and the disassembly of the first girdle 2 and the second girdle 3 on the fixing plate 1; thereby realizing the recycling of the first endless belt 2 and the second endless belt 3.

The embodiment of the application provides a multi-functional intracardiac branch of academic or vocational study radial artery haemostat, it implements the step and is:

1. clamping the convex blocks 21 on the side walls of the first annular belt 2 and the second annular belt 3 in the grooves 10 on the left side wall and the right side wall of the fixing plate 1, aligning the hollow column 6 on the fixing plate 1 to the radial artery wound, and adjusting the limiting through holes 20 and the limiting clamping blocks 30 on the first annular belt 2 and the second annular belt 3 according to the thickness of the arm of a patient;

2. the stud 612 rotates and moves downwards in the inner cavity of the hollow column 6 by rotating the rotating handle 611, the stud 612 moves downwards and simultaneously drives the fixing block 613 attached to the bottom of the stud to move downwards, the fixing block 613 moves downwards and simultaneously extrudes the spring 614 to drive the telescopic rod 615 and the pressing plate 616 connected to the bottom of the telescopic rod, and the pressing plate 616 presses the bleeding part of the patient, so that the effect of stopping bleeding is achieved;

3. after the telescopic rod 615 drives the pressing plate 616 to press the bleeding part of the patient, corresponding time is set for the alarm 5, and the bleeding condition of the bleeding part of the patient is detected in real time through the blood detection sensor 617 at the bottom of the pressing plate 616.

When the bleeding amount is abnormal, the alarm 5 gives an alarm to inform medical staff to process in time; or when the alarm 5 presets the bleeding stopping time, the alarm 5 gives an alarm. The rotating handle 611 is rotated reversely to drive the stud 612 to rotate and move upwards; meanwhile, the downward extrusion force of the bottom of the stud 612 on the fixing block 613 disappears, the spring 614 generates upward tension to push the telescopic rod 615 to move upwards, the fixing block 613 at the top of the telescopic rod 615 is attached to the stud 612 for limiting, and the hemostat is taken down in time.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-functional intracardiac branch of academic or vocational study radial artery haemostat which characterized in that, it includes:

the fixing plate comprises a fixing plate (1), wherein a first annular belt (2) and a second annular belt (3) are connected to two ends of the fixing plate (1) respectively, the first annular belt (2) and the second annular belt (3) are connected in a length-adjustable mode, and a hollow column (6) is further arranged on the fixing plate (1);

a blood detection sensor (617), the blood detection sensor (617) being located below the hollow column and used for detecting whether blood seeps;

the alarm (5) is positioned on the fixing plate (1) and connected with the blood detection sensor (617), and the alarm (5) is used for giving an alarm when the blood detection sensor (617) detects the blood seepage and giving an alarm when the set hemostasis time is reached;

the battery seat (4), the said battery seat (4) locates on said dead plate (1);

the battery (40), the battery (40) is located on the battery seat (4) and is connected with the blood detection sensor (617) and the alarm (5).

2. The multifunctional cardiology radial artery hemostat of claim 1, wherein the hollow column (6) has a compression assembly (61) inside, the compression assembly (61) comprising:

the stud (612) is screwed in the hollow column (6) through the internal thread of the hollow column (6);

a fixing block (613), wherein the fixing block (613) is connected below the stud (612);

the telescopic rod (615), the said telescopic rod (615) is connected to the lower side of fixed block (613);

the top end of the pressure plate (616) is connected to the bottom of the telescopic rod (615), and the bottom end of the pressure plate (616) is connected to the blood detection sensor (617).

3. The multifunctional cardiology radial artery hemostat of claim 1, wherein the hollow column (6) has a compression assembly (61) inside, the compression assembly (61) comprising:

the stud (612) is screwed inside the hollow column (6) through the internal thread of the hollow column (6);

a fixing block (613), wherein the fixing block (613) is positioned below the stud (612);

the top end of the pressure plate (616) is connected to the bottom of the telescopic rod (615), and the bottom end of the pressure plate (616) is connected with the blood detection sensor (617);

and the spring (614) is sleeved on the telescopic rod (615), and the bottom of the spring is fixed inside the hollow column (6).

4. The multifunctional cardiology radial artery hemostat of claim 2 or 3, wherein: the top of the hollow column (6) is connected with a protective cover (60).

5. The multifunctional cardiology radial artery hemostat of claim 2 or 3, wherein: the top end of the stud (612) is connected with a rotating handle (611).

6. The multifunctional cardiology radial artery hemostat of claim 1, wherein: a plurality of limiting through holes (20) are formed in the first annular belt (2), and a limiting clamping block (30) matched with the limiting through holes (20) is formed in the second annular belt (3); or, the first ring belt (2) is provided with a limiting fixture block (30), and the second ring belt (3) is provided with a plurality of limiting through holes (20) matched with the limiting fixture block (30).

7. The multifunctional cardiology department radial artery hemostat of claim 1, wherein: a lamp strip (11) is arranged on the fixing plate (1), and the lamp strip (11) is connected with the battery (40).

8. The multifunctional cardiology radial artery hemostat of claim 1, wherein: the first annular belt (2) and the second annular belt (3) are detachably connected with the fixing plate (1).

9. The multifunctional cardiology radial artery hemostat of claim 8, wherein: the fixing plate is characterized in that grooves (10) are formed in two sides of the fixing plate (1), protruding blocks (21) are arranged on the first annular belt (2) and the second annular belt (3), and the protruding blocks (21) are matched with the grooves (10).