Cold compress or hot compress device

Abstract

The invention is suitable for the technical field of medical instruments, and discloses a cold compress or hot compress device. The invention provides a cold compress or hot compress device. The cold and hot compress equipment aims to solve the technical problem that in the prior art, the early-stage preparation time of cold and hot compress equipment is too long, the cold and hot compress equipment comprises a cold and hot box body, a guide pipe set and a gripper, the guide pipe set is connected with the cold and hot box body and the gripper, the interior of the cold and hot box body is divided into a cold cavity and a hot cavity, and a cooling pipe and a heating pipe are arranged in the two cavities. The cooling pipe and the heating pipe are connected together through a communicating pipe, and the interiors of the cooling pipe and the heating pipe are communicated; according to the cold and hot compress device, through the arrangement of the bendable clamping plate, the device is more attached to the wounded part of a patient in the cold and hot compress process, the internal space of the device is extruded through the elastic upper covering cloth and the elastic lower covering cloth due to bending of the clamping plate, liquid on the two sides flows mutually, and therefore the patient can feel more comfortable. Therefore, the process of adding liquid before cold and hot compress is not needed, and the early-stage preparation time of cold and hot compress is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a cold compress or hot compress device. Background Art

[0002] Hospitals often need to cool the heads and parts of the body of patients with high fever and cancer chemotherapy, to help comatose patients revive, to force high fever patients to reduce fever, to prevent wound infection, etc. Hospitals also often need to apply hot compresses to parts of the patient's body to promote local blood circulation in order to achieve the purpose of physical therapy and rehabilitation.

[0003] The hot and cold compress equipment currently widely used in hospitals requires the internal liquid tank to be taken out before use, and then an appropriate amount of liquid is added, and then placed in the equipment, and then the equipment is started, the parameters are adjusted, and hot and cold compresses are performed. The preliminary preparation work of such equipment is too long, which greatly wastes the patient's hot and cold compress time. In addition, the equipment has many buttons and is difficult for non-professionals to use. Moreover, it is easy to be accidentally touched by others during use, resulting in hot and cold exchange, thereby aggravating the patient's injuries.

[0004] The Chinese utility model patent with the announcement number CN2772476Y on April 19, 2006 disclosed an electronic medical cold compress device that can directly contact the patient to cool down, has low temperature loss, high efficiency, and is easy to use. It includes a control box and a cold compress device, which is characterized in that a water tank with a radiator, a switch, an indicator light, a water pump, and a power supply for electronic refrigeration are arranged in the control box; the cold compress device is composed of an electronic cooling sheet, a water box, a thermal insulation layer, and a jacket, wherein the water box is close to the heat dissipation surface of the electronic cooling sheet, the cold surface temperature adopts cold-temperature soft conduction, and the electronic cooling sheet is electrically connected to the electronic refrigeration power supply in the control box; the water flow loop between the control box and the water box of the cold compress device is in the following order: water tank, water pump input pipe, water pump output pipe, water box water inlet pipe, water box water outlet pipe, water tank. This patent discloses a simple way to cool down, but it is impossible to switch between cold and hot.

[0005] The Chinese utility model patent with announcement number CN208435903U disclosed a medical trauma cold and hot compress on January 29, 2019, including an instrument body and a telescopic tube. The instrument body is composed of a small cold and hot source box and a storage battery arranged on the side of the small cold and hot source box. A start switch is provided on the top of the small cold and hot source box, and the small cold and hot source box is movably connected to the start switch by screws. A sealed insulation ring is installed on the side of the small cold and hot source box, and the sealed insulation ring is embedded in the small cold and hot source box to prevent the wound from being completely covered and play an effective cold and hot compress effect. The patent can switch between cold and hot compress, but does not disclose the specific internal structure.

[0006] Therefore, it is necessary to provide a cold compress or hot compress device that is easy to switch. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a cold compress or hot compress device, which aims to solve the technical problems in the prior art that the preliminary preparation time of cold and hot compress equipment is too long and the switching is inconvenient.

[0008] To achieve the above objectives, the present invention provides a cold compress or hot compress device.

[0009] Preferably, it comprises a cold and hot box, a conduit group and a gripper; the conduit group connects the cold and hot box and the gripper; The inner part of the cold and hot box is composed of two cold and hot cavities, and a cooling pipe and a heating pipe are arranged in the two cavities. The cooling pipe and the heating pipe are connected together through a connecting pipe, and the insides thereof are connected; The gripper includes a middle layer of a card plate, and an upper cover cloth and a lower cover cloth are respectively connected to both sides of the card plate. A cavity is formed between the card plate and the upper cover cloth as a cold compress cavity, and a cavity is formed between the card plate and the lower cover cloth as a hot compress cavity. By bending the card plate, the two cavities are transformed with each other to achieve the purpose of alternating hot and cold.

[0010] Preferably, the catheter group includes a cold catheter and a hot catheter, and the outer peripheries of the cold catheter and the hot catheter are equipped with insulation sleeves for protection and heat preservation, wherein the hot catheter connects the heating tube and the hot compress cavity, and the cold catheter connects the cooling tube and the cold compress cavity.

[0011] Preferably, the material of the card plate is a stainless steel soft plate, which has a bending qualitative effect, and the upper cover cloth and the lower cover cloth are both elastic.

[0012] Preferably, the cavity inside the cold and hot box is divided into an upper cavity and a lower cavity, wherein the cooling tube is located in the upper cavity, a refrigerator is also fixed in the upper cavity, and the heating tube is located in the lower cavity, a heater is also fixed in the lower cavity, wherein the cooling tube and the heating tube are arranged in multiple sections.

[0013] Preferably, two symmetrical contact plates are fixed to the top ends of both sides of the connecting tube, and two symmetrical contact switches are also provided on the inner wall of the connecting tube. The two contact switches control the start-up of the refrigerator and the heater respectively.

[0014] Preferably, a sealing box is provided on both sides of the connecting pipe, and a contact switch is provided in the sealing box; the sealing box is provided with a sealing plate for preventing the contact switch from contacting water.

[0015] Preferably, each of the contact switches corresponds to a touch rod, one end of the touch rod is connected to the deformation plate, and the other end passes through the sealing plate and is fixed on the side wall of the sealing box.

[0016] Preferably, the cross section of the deformation plate is crescent-shaped, and both upper and lower sides are arc-shaped. The touch rod passes through the deformation plate and is fixed to the lower side of the deformation plate.

[0017] Preferably, a spherical groove is arranged at the center of one side of the deformation plate, and a plurality of groove bars connected to the spherical groove are arranged on the same side.

[0018] Preferably, there are a plurality of groove strips, and a plurality of through holes are arranged on a side of the groove strip away from the spherical groove; the total number of openings of the through holes on each groove strip is different.

[0019] Compared with the prior art, the cold compress or hot compress device provided by the present invention has the following beneficial effects: 1. The bendable pallet can be set to fit the patient's injured part better during hot and cold compresses, especially on the hands and legs. It can be directly clamped on the injured part and will not fall off easily. The bending of the pallet allows the elastic upper and lower cover cloths to squeeze the internal space, allowing the liquids on both sides to flow to each other, eliminating the need to add liquid before hot and cold compresses, thereby reducing the preliminary preparation time for hot and cold compresses.

[0020] 2. The contact plate can be offset by the flow of liquid so that it contacts the contact switch, which can automatically start the heating and cooling process. No external buttons are required, which makes it more convenient and quick to use. It can also effectively avoid the cold and hot changes caused by accidental touch from the outside world, which will aggravate the patient's injuries.

[0021] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 2 is a perspective view of an embodiment of the present invention.

[0023] Figure 2 It is a front view of the cold and hot box body of the present invention.

[0024] Figure 3 Embodiment of the present invention Figure 2 Cross-sectional view along the AA direction.

[0025] Figure 4 Embodiment of the present invention Figure 2 Cross-sectional view along the BB direction.

[0026] Figure 5 It is a half-section view of the gripper of the present invention.

[0027] Figure 6 It is a structural diagram of embodiment 2 of the present invention.

[0028] Figure 7It is a top view of the deformation plate on the left side of the second embodiment of the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the catheter of the present invention.

[0030] in: 10-cold and hot box; 11-card; 12-insulation sleeve; 13-cold pipe; 14-heat pipe; 15-hot compress chamber; 16-cold compress chamber; 17-upper cover cloth; 18-lower cover cloth; 19-refrigerator; 20-cooling pipe; 21-heating pipe; 22-heater; 23-connecting pipe; 24-contact plate; 25-contact switch; 3-sealed box; 31-sealed plate; 4-touch rod; 5-deformation plate; 51-spherical groove; 52-groove strip; 53-through hole DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0032] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0035] See also Figure 1 and Figure 3 The embodiment of the present invention provides a cold compress or hot compress device, including a hot and cold box 10, a catheter group and a gripper, wherein the catheter group connects the hot and cold box 10 and the gripper, wherein the interior of the hot and cold box 10 is divided into two cold and hot cavities, and cooling tubes 20 and heating tubes 21 are arranged in the two cavities, and liquid flows in all pipes and the gripper, and the cooling tubes 20 and the heating tubes 21 are connected together by a connecting tube 23, and their interiors are connected, and the cavity in the hot and cold box 10 is divided into an upper cavity and a lower cavity, wherein the cooling tube 20 is located in the upper cavity, and a refrigerator 19 is also fixed in the upper cavity, and the temperature inside the upper cavity is reduced by the refrigerator 19, so that the temperature of the liquid inside the cooling tube 20 is reduced, and the heating tube 21 is located in the lower cavity, and a heater 22 is also fixed in the lower cavity, and the temperature inside the lower cavity is increased by the heater 22, so that the temperature of the liquid inside the heating tube 21 is increased, wherein the cooling tube 20 and the heating tube 21 are arranged in multiple sections of bending, so as to increase the time for absorbing and releasing heat. Figure 5 As shown in the figure, the gripper includes a middle layer of a card plate 11, and the two sides of the card plate 11 are respectively connected to an upper cover cloth 17 and a lower cover cloth 18. A cavity is formed between the card plate 11 and the upper cover cloth 17 as a cold compress cavity 16, and a cavity is formed between the card plate 11 and the lower cover cloth 18 as a hot compress cavity 15. By bending the card plate 11, the two cavities are transformed with each other to achieve the purpose of alternating hot and cold. The material of the card plate 11 is a stainless steel soft plate, which has a bending qualitative effect. The upper cover cloth 17 and the lower cover cloth 18 are both elastic, and both are elastic and sealed materials, such as rubber. In the process of bending the card plate 11, the hot compress cavity 15 will be squeezed to make the liquid flow into the cold compress cavity 16 through the pipeline.

[0036] See also Figure 1 —— Figure 5 As shown in the figure, the catheter group includes a cold catheter 13 and a hot catheter 14. The outer periphery of the cold catheter 13 and the hot catheter 14 is equipped with an insulating sleeve 12 for protection and thermal insulation. The hot catheter 14 is connected to the heating tube 21 and the hot compress cavity 15, and the cold catheter 13 is connected to the cooling tube 20 and the cold compress cavity 16. All the pipes are relatively thin, and the liquid stored therein is less than the amount of liquid that can be stored inside the gripper.

[0037] See also Figure 3 and Figure 4 As shown in the figure, two symmetrical contact plates 24 are fixed to the top of both sides of the connecting tube 23, and two symmetrical contact switches 25 are also provided on the inner wall of the connecting tube 23. The two contact switches 25 respectively control the start of the refrigerator 19 and the heater 22. The contact plate 24 is bent by the flow of liquid, so that the contact plate 24 can contact the contact switch 25, and the refrigerator 19 and the heater 22 can be started at this time.

[0038] The refrigerator 19 in the drawings of this embodiment is relatively simple. The specific refrigerator 19 can refer to the refrigeration equipment of CN2772476Y, or can adopt the cooling system of the current refrigerator. Whether it is cooling or heating, the water in the cooling pipe 20 is achieved by heat transfer, for example, the water in the cooling pipe increases as the temperature of the heater 22 increases, or decreases as the temperature of the refrigerator 19 decreases.

[0039] The specific working process is that during use, when a cold compress is needed, the card plate 11 can be bent and attached to the part of the patient that needs a cold compress. At this time, since the entire liquid flow system is in a vacuum state, and the lower cover cloth 18 is in a stretched state and the upper cover cloth 17 is in a relaxed state during the bending upward of the card plate 11, the liquid in the hot compress cavity 15 is squeezed by the elasticity of the lower cover cloth 18 and flows into the cold compress cavity 16 through the pipeline. Since the upper cover cloth 17 is in a relaxed state at this time, the cold compress cavity 16 inside it is in a negative pressure state, and the liquid will be sucked into the cold compress cavity 16. The two states of squeezing and absorption can make the flow rate of the liquid large enough, and the liquid in the hot compress cavity 15 is squeezed by the hot compress cavity 15. The conduit 14 flows into the heating tube 21, and then flows into the connecting tube 23. At this time, the contact plate 24 located at the outlet of the heating tube 21 is offset in the direction away from the corresponding contact switch 25 and cannot contact it. When the liquid flows into the cooling tube 20 through the connecting tube 23, the liquid will drive the contact plate 24 located at the outlet of the cooling tube 20 to offset in the direction close to the corresponding contact switch 25, thereby contacting the contact switch 25. At this time, the refrigerator 19 can be started to cool the liquid in the cooling tube 20. The cooled liquid flows into the cold compress cavity 16 through the cold conduit 13, which can reduce the temperature of the surface of the upper cover cloth 17 and achieve the effect of cooling and cold compress.

[0040] When hot compress is needed, it is necessary to bend the card plate 11 downward so that the upper cover cloth 17 is in a stretched state, squeezing the cold compress cavity 16, while the lower cover cloth 18 is in a relaxed state. The hot compress cavity 15 forms a negative pressure, which can make the liquid flow into the hot compress cavity 15. During the flow of the liquid, the situation is exactly the opposite of the above. At this time, the heater 22 is started to heat the liquid in the heating tube 21, and then flows into the lower cover cloth 18 to achieve the effect of hot compress. The time for the water flow to flow completely is generally short. Therefore, if it is already in a hot compress state and then a hot compress is needed, it is necessary to first bend the card plate 11 to put it in a cold compress state, and then bend it in the opposite direction. In this way, the overall time is still relatively short, which greatly saves the preliminary preparation time for hot and cold compresses. Embodiment 2

[0041] In the first embodiment, water flow impact is used to make the contact plate 24 contact the contact switch 25 to drive the heater 22 or the refrigerator 19, wherein the heater 22 or the refrigerator 19 is connected to a double-control switch in the circuit, and when one is turned on, the other will be turned off, and the two will not be started together. However, this method may cause poor contact effect due to too low water pressure. In the second embodiment, this part of the structure is improved.

[0042] like Figure 6 As shown, the connecting pipe 23 is connected to the cooling pipe 20 and the heating pipe 21 respectively, the heat pipe 14 connects the heating pipe 21 and the hot compress cavity 15, and the cold pipe 13 connects the cooling pipe 20 and the cold compress cavity 16. A sealed box 3 is arranged on both sides of the connecting pipe 23, and a contact switch 25 is arranged in the sealed box 3. A sealing plate 31 is arranged on the sealed box 3 to ensure that the contact switch 25 does not contact water. Each contact switch 25 corresponds to a touch rod 4. One end of the touch rod 4 is connected to the deformation plate 5, and the other end passes through the sealing plate 31 and is fixed on the side wall of the sealed box 3. The touch rod 4 is a deformable material, and the touch rod 4 is a material that carries static electricity, which can be a plastic material with static electricity. The principle of the contact switch and the touch rod 4 is the touch switch currently used. After touching, the light can be controlled to turn on. The present invention can cause the heater 22 or the refrigerator 19 to start after touching. In order to prevent the loss of static electricity, the contact position between the touch rod 4 and the sealed box 3 is made of an insulator material without electricity. The portion of the touch rod 4 extending out of the sealing plate 31 is an insulating portion. Alternatively, the entire touch rod 4 is an insulator, and only the portion that contacts the contact switch 25 is a statically charged portion.

[0043] See also Figure 6 and Figure 7 , the connecting pipe 23 is connected to the cooling pipe 20 and the heating pipe 21 respectively. A deformation plate 5 is provided at the connection position of the cooling pipe 20, the heating pipe 21 and the connecting pipe 23. The cross section of the deformation plate 5 is crescent-shaped, and both the upper and lower sides are arc-shaped. The touch rod 4 passes through the deformation plate 5 and is fixed to the lower side of the deformation plate 5. The two deformation plates 5 are upside down, but the structure is the same.

[0044] by Figure 6 For example, the left deformation plate 5 is a concave crescent shape. A spherical groove 51 is provided in the center of the left deformation plate 5. The bottom opening of the spherical groove 51 is the largest, so that the area receiving the impact force is larger and the force in the middle is greater. The touch rod 4 passes through the deformation plate 5 and the upper part of the spherical groove 51 from top to bottom. Figure 7 , a plurality of groove bars 52 are arranged at the bottom of the deformation plate 5 on the left side. The groove bars are evenly distributed and preferably there are 4 groove bars. The forces received by the groove bars and other parts of the bottom surface are different, which makes it easier to deform. The groove bars 52 are all connected to the spherical grooves 51. A plurality of through holes 53 are arranged on the side of the groove bars 52 away from the spherical grooves 51. When the through holes 53 are the same size, the number of through holes 53 on each groove bar 52 is different. When the number of through holes 53 is different, the total area of ​​through holes formed by the through holes 53 on each groove bar 52 is different. In this way, when water flows through, the water pressure at each place is different, which makes it easier for the deformation plate 5 to deform. The aperture of the through hole 53 can be smaller, so that the water passes through slowly, the pressure received by the deformation plate 5 is greater, and the deformation amount is greater.

[0045] by Figure 6 For example, the right side deformation plate 5 is a crescent shape convex upward. The touch rod 4 passes through the spherical groove 51 from top to bottom and is connected to the upper side of the deformation plate 5.

[0046] The deformation plate is configured in this way, and the deformation amount is larger, and the situation that the touch rod 4 cannot touch the contact switch 25 will not be caused. On the other hand, when the touch rod 4 is bent and touches the contact switch 25, when the touch rod 4 is not subjected to force, the touch rod 4 may swing up and down like a spring and repeatedly touch the contact switch. However, since the deformation plate 5 has a certain deformation amount and is arched, the elastic force of the touch rod 4 is offset, thereby reducing the up and down swinging of the touch rod 4, and the situation of repeatedly touching the contact switch 25 will not occur.

[0047] The sealing plate 31 is made of silicone material. Since cold compress is involved, the silicone material needs to be selected as a material that will not harden at temperatures below 0°C. The materials that can be selected include silicone rubber, chloroprene rubber, butyl rubber, etc., so that they will not harden during cold compress and affect the sealing performance.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold or hot compress device, comprising a cold or hot box (10), a catheter assembly and a gripper, characterized in that: The conduit group connects the cold and hot boxes (10) and the gripper; The interior of the cold and hot box (10) is divided into two cold and hot cavities, wherein a cooling pipe (20) and a heating pipe (21) are arranged in the two cavities, and the cooling pipe (20) and the heating pipe (21) are connected together via a connecting pipe (23), and the interiors thereof are connected; The gripper comprises a middle layer of a card plate (11), and the two sides of the card plate (11) are respectively connected to an upper cover cloth (17) and a lower cover cloth (18); a cavity is formed between the card plate (11) and the upper cover cloth (17) as a cold compress cavity (16); a cavity is formed between the card plate (11) and the lower cover cloth (18) as a hot compress cavity (15); and the purpose of alternating between hot and cold is achieved by bending the card plate (11) so that the two cavities are interchangeable.

2. A cold or hot compress device as claimed in claim 1, characterized in that: The catheter group comprises a cold catheter (13) and a hot catheter (14), wherein the outer peripheries of the cold catheter (13) and the hot catheter (14) are provided with a heat insulating sleeve (12) for protection and heat preservation, wherein the hot catheter (14) is connected to the heating tube (21) and the hot compress cavity (15), and the cold catheter (13) is connected to the cooling tube (20) and the cold compress cavity (16).

3. A cold or hot compress device as claimed in claim 1, characterized in that: The material of the card plate (11) is a stainless steel soft plate, which has a bending and qualitative effect, and the upper cover cloth (17) and the lower cover cloth (18) are both elastic.

4. A cold or hot compress device as claimed in claim 1, characterized in that: The cavity inside the cold and hot box (10) is divided into an upper cavity and a lower cavity, wherein the cooling tube (20) is located in the upper cavity, a refrigerator (19) is also fixed in the upper cavity, and the heating tube (21) is located in the lower cavity, a heater (22) is also fixed in the lower cavity, wherein the cooling tube (20) and the heating tube (21) are arranged in multiple sections of bending.

5. A cold or hot compress device as claimed in claim 4, characterized in that: Two symmetrical contact plates (24) are respectively fixed to the top ends of both sides of the connecting tube (23), and two symmetrical contact switches (25) are also provided on the inner wall of the connecting tube (23). The two contact switches (25) respectively control the start-up of the refrigerator (19) and the heater (22).

6. A cold or hot compress device as claimed in claim 1, characterized in that: A sealing box (3) is provided on both sides of the connecting pipe (23), and a contact switch (25) is provided in the sealing box (3); the sealing box (3) is provided with a sealing plate (31) for preventing the contact switch (25) from contacting water.

7. A cold or hot compress device as claimed in claim 6, characterized in that: Each of the contact switches (25) corresponds to a touch rod (4), one end of the touch rod (4) is connected to the deformation plate (5), and the other end passes through the sealing plate (31) and is fixed to the side wall of the sealing box (3).

8. A cold or hot compress device as claimed in claim 7, characterized in that: The cross section of the deformation plate (5) is crescent-shaped, and both upper and lower sides are arc-shaped. The touch rod (4) passes through the deformation plate (5) and is fixed to the lower side of the deformation plate (5).

9. A cold or hot compress device as claimed in claim 8, characterized in that: A spherical groove (51) is provided at the centre of one side of the deformation plate (5), and a plurality of groove strips (52) connected to the spherical groove (51) are provided on the same side.

10. A cold or hot compress device as claimed in claim 9, characterized in that: There are a plurality of groove strips (52), and a plurality of through holes (53) are provided on a side of the groove strip (52) away from the spherical groove (51); the total number of openings of the through holes (53) on each groove strip (52) is different.

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