Ear canal cleaner with cleaning head convenient to replace

Abstract

The utility model relates to the technical field of auditory meatus cleaning, in particular to an auditory meatus cleaner with a cleaning head convenient to replace, which comprises an auditory meatus cleaner body, one end of the auditory meatus cleaner body is fixedly connected with a dirt guide pipe, and one end of the dirt guide pipe extends into the auditory meatus cleaner body. The end, away from the ear canal cleaner body, of the dirt guide pipe is fixedly connected with a fixing rod, and a containing groove is formed in the upper end face of the fixing rod. Compared with the prior art, the fixing assembly and the extrusion assembly are matched for use, the connecting rod is directly clamped in the containing groove, the replacement process is rapid and convenient, and the technical problems that the cleaning head needs to be rotated to be mounted and dismounted, and time is consumed in the process are solved; and secondly, the dirt suction hole, the accommodating cavity, the first dirt guide hole and the second dirt guide hole are matched for use, so that the technical problem that the dirt suction pipe cannot suck dust and impurities at the end, in contact with the ear canal, of the cleaning head due to the fact that the cleaning head is arranged at the front end of the dirt suction pipe is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ear canal cleaning technical field, concretely is an ear canal cleaner convenient to replace cleaning head. BACKGROUND

[0002] In daily life, keeping ear canal clean is very important for people's health. At present, there are various ear canal cleaners on the market. The existing ear canal cleaning methods mainly include the following: using an ear pick, a cotton swab, an electric ear canal cleaner, and some existing ear canal cleaners have poor adaptability to different people's ear canal during use. For example, for children or people with narrow ear canal, the cleaner may not be suitable in size, which may not effectively clean or cause discomfort.

[0003] At present, the existing patent with the patent number CN221384029U proposes an ear-nose-throat ear canal cleaner, which comprises a main body, an installation groove is formed in the inside of the main body, a suction pipe is installed at one end of the installation groove, the suction pipe extends into the inside of the main body, a pollution guide pipe is installed at one end of the suction pipe inside the main body, a connecting head is fixedly installed at one end of the suction pipe away from the pollution guide pipe, an internal thread groove is formed in the inside of the connecting head, and a cleaning head is arranged at one end of the connecting head away from the pollution guide pipe.

[0004] Through the above setting, the existing technology has an internal thread groove in the inside of the connecting head, a threaded rod is arranged on one side surface of the cleaning head, when it is necessary to replace or disinfect and clean the cleaning head, the cleaning head is rotated, the threaded rod is rotated by the cleaning head, and the cleaning head is removed, then the cleaning head can be replaced or disinfected and cleaned, so that the device can replace the cleaning head according to the size of the patient's ear canal during use, and the practicability of the device is improved.

[0005] However, the ear-nose-throat ear canal cleaner of the existing technical solution has the following defects when it is operated:

[0006] (1) In the existing technology, the cleaning head is connected by the connecting head fixedly connected with one end of the suction pipe, the cleaning head can be replaced according to the size of the patient's ear canal during use, but the threaded connection needs to be rotated to install and disassemble the cleaning head, which is time-consuming, especially when the cleaning head needs to be replaced frequently, which will bring inconvenience to the user, and the groove structure of the thread is easy to accumulate earwax, dust and other impurities, which are not only difficult to clean, but also may breed bacteria and mold, even if cleaned, there may be the problem of incomplete cleaning, thereby causing a sanitation hazard to the ear canal;

[0007] (2) in the prior art, by setting a plurality of dirt inlet on the outer wall of the dirt suction pipe, the dust and impurities in the patient's ear canal enter the inside of the dirt suction pipe from the dirt inlet, but when cleaning the ear canal, the cleaning head is at the front end of the dirt suction pipe, and the dirt suction pipe cannot suck the dust and impurities at the end of the ear canal contacted by the cleaning head. Practical new type content

[0008] The ear canal cleaner with the cleaning head convenient to replace aims to solve the technical problems that the cleaning head and the connecting head are connected through threads, the cleaning head needs to be rotated for installation and dismounting, the process is time-consuming, and the groove structure of the thread is easy to accumulate earwax, dust and other impurities, and the technical problem that the cleaning head is at the front end of the dirt suction pipe, and the dirt suction pipe cannot suck the dust and impurities at the end of the ear canal contacted by the cleaning head.

[0009] To solve the above technical problems, the utility model provides the following technical scheme:

[0010] An ear canal cleaner with a cleaning head convenient to replace, comprising an ear canal cleaner main body, a dirt guide pipe fixed to one end of the ear canal cleaner main body, the other end of the dirt guide pipe extending into the inside of the ear canal cleaner main body, a fixed rod fixed to the end of the dirt guide pipe away from the ear canal cleaner main body, a placing groove opened in the upper end face of the fixed rod, a connecting rod detachably connected in the placing groove, a cleaning head fixed to one end of the connecting rod, a containing cavity opened in the cleaning head, a plurality of dirt suction holes opened in the outer wall of the cleaning head, the dirt suction holes being in communication with the containing cavity, a plurality of installation grooves opened in the inner wall of the placing groove, a fixing assembly for fixing the connecting rod installed in the installation grooves, a sliding groove opened in the lower side wall of the installation groove, an arc-shaped groove opened in the lower side wall of the placing groove, the other end of the arc-shaped groove being in communication with the sliding groove, a pressing assembly for pressing the fixing assembly slidably connected in the sliding groove, a first dirt guide hole opened in the lower side wall of the placing groove, the first dirt guide hole being in communication with the dirt guide pipe, a second dirt guide hole opened in the upper end face of the connecting rod, the first dirt guide hole and the second dirt guide hole being coaxial and in communication, and the second dirt guide hole being in communication with the containing cavity.

[0011] The working principle and beneficial effects of the utility model are as follows:

[0012] 1. Working principle: when the ear canal needs to be cleaned, (the fan is turned on, and the rotation of the fan will cause the internal negative pressure of the main body), the bracket is a quotation of the prior art, which is not described in detail in this application file, at this time, the dust and impurities in the user's ear canal enter the receiving cavity of the cleaning head from the pollution inlet, and then pass through the second pollution guide hole, the first pollution guide hole and the pollution guide pipe in turn. After cleaning, when the cleaning head needs to be replaced, pull the cleaning head, the cleaning head drives the connecting rod to move out of the placement slot. The outer wall of the connecting rod will extrude the fixing assembly during the movement process until the connecting rod is completely removed from the placement slot. Then, according to the size of the user's ear canal, select the appropriate cleaning head, align the connecting rod with the placement slot, press the cleaning head, and the cleaning head drives the connecting rod into the placement slot. The fixing assembly extrudes the connecting rod during the process of the connecting rod entering the placement slot. When the lower end surface of the connecting rod abuts against the lower side wall of the placement slot, the fixing assembly completely clamps the connecting rod, and at the same time, the lower end surface of the connecting rod pushes the extrusion assembly, and the extrusion assembly extrudes the fixing assembly. At this time, the fixing assembly is limited and cannot shake, and the connecting rod is firmly clamped by the fixing assembly.

[0013] 2. Beneficial effects:

[0014] (1) The prior art opens an internal thread groove in the connecting head, and a threaded rod is arranged on one side surface of the cleaning head. When the cleaning head needs to be replaced or disinfected and washed, the cleaning head is rotated, the cleaning head drives the threaded rod to rotate, and the cleaning head is taken off, so that the cleaning head can be replaced or disinfected and washed, so that the device can replace the cleaning head according to the size of the patient's ear canal during use, solving the technical problem that some ear canal cleaners in the prior art have poor adaptability to different people's ear canals during use. However, the threaded connection needs to be rotated to install and disassemble the cleaning head, which is time-consuming. Especially in the case of frequent replacement of the cleaning head, it will bring inconvenience to the user, and the thread groove structure is easy to accumulate earwax, dust and other impurities. These impurities are not only difficult to clean, but also may breed bacteria and mold. Even if cleaned, there may be the problem of incomplete cleaning, thereby causing a sanitation hazard to the ear canal. The present scheme uses the fixing assembly and the extrusion assembly in cooperation, without threaded connection. When the cleaning head needs to be replaced or cleaned, the cleaning head is directly pulled off, the cleaning head is disassembled from the fixing rod, and then the appropriate cleaning head is selected and directly clamped in the placement slot. The replacement process is fast and convenient, solving the technical problem that the installation and disassembly of the cleaning head need to be rotated.

[0015] (2) The present scheme opens a plurality of pollution suction holes in the outer wall of the cleaning head, and sets a receiving cavity in the inner part of the cleaning head, which is used in cooperation with the first pollution guide hole and the second pollution guide hole to suck the dust and impurities in the ear canal, solving the technical problem that the pollution suction pipe cannot suck the dust and impurities on the end of the cleaning head contacting the ear canal.

[0016] Preferably, the fixing assembly comprises a spring sheet mounted on the inner wall of the mounting groove, one end of the spring sheet is fixedly connected with the inner wall of the mounting groove, and the other end of the spring sheet is slidably connected inside the mounting groove, and the outer wall of the connecting rod is provided with a clamping groove matched with the spring sheet; when the cleaning head needs to be replaced, the cleaning head is pulled to drive the connecting rod to move upwards, the outer wall of the connecting rod will press the spring sheet in the process of moving upwards until the connecting rod is completely removed from the preventing groove, then a suitable cleaning head is selected according to the size of the ear canal of the user, the connecting rod is aligned with the placing groove, the cleaning head is pressed, the cleaning head drives the connecting rod to enter the placing groove, the outer wall of the connecting rod will press the spring sheet in the process of entering the placing groove until the outer wall of the spring sheet abuts against the inner wall of the clamping groove, and meanwhile the lower end surface of the connecting rod abuts against the lower side wall of the placing groove, at this moment, the lower end surface of the connecting rod presses the spring sheet, the one end of the spring sheet is pressed by the extruding assembly, the outer wall of the spring sheet is tightly abutted against the inner wall of the clamping groove, so that the spring sheet cannot shake in the clamping groove, the connecting rod is more stably inserted in the placing groove, and the process of cleaning the ear canal is more safe.

[0017] Preferably, the extruding assembly comprises a long rod slidably connected in the sliding groove, an arc-shaped block is slidably connected in the arc-shaped groove, one end of the arc-shaped block abuts against one end of the long rod, and the other end of the long rod extending into the mounting groove is fixedly connected with a limiting block, and the upper end surface of the limiting block abuts against one end of the spring sheet; when the cleaning head needs to be replaced, the cleaning head is pulled to drive the connecting rod to move upwards, the outer wall of the connecting rod will press the spring sheet in the process of moving upwards until the connecting rod is completely removed from the preventing groove, then a suitable cleaning head is selected according to the size of the ear canal of the user, the connecting rod is aligned with the placing groove, the cleaning head is pressed, the cleaning head drives the connecting rod to enter the placing groove, the outer wall of the connecting rod will press the spring sheet in the process of entering the placing groove until the one end of the spring sheet abuts against the inner wall of the clamping groove, and meanwhile the lower end surface of the connecting rod abuts against the lower side wall of the placing groove, at this moment, the lower end surface of the connecting rod presses one end of the arc-shaped block, when the two ends of the arc-shaped block are flush with the lower side wall of the placing groove, the other end of the arc-shaped block extrudes the long rod, the long rod moves upwards along the sliding groove, the long rod moving upwards drives the limiting block to move upwards and press one end of the spring sheet, so that the outer wall of the spring sheet is tightly abutted against the inner wall of the clamping groove, and the spring sheet cannot shake in the clamping groove, and the connecting rod is firmly clamped in the placing groove by the spring sheet.

[0018] Preferably, the inner wall of the containing cavity is fixedly connected with a dirt guide block, and the dirt guide block is in communication with the second dirt guide hole; when the ear canal is cleaned, the dust and impurities in the ear canal enter the dirt suction hole, enter the containing cavity through the dirt suction hole, and enter the second dirt guide hole, the first dirt guide hole and the dirt guide pipe in sequence through the dirt guide block, and enter the ear canal cleaner main body through the dirt guide pipe, so that the user only needs to aim the cleaning head at the dust and impurities in the ear canal to directly clean the dust and impurities.

[0019] Preferably, the upper end surface of the fixed rod is provided with an annular groove, and a sealing ring is arranged in the annular groove; the annular groove is arranged in the upper end surface of the fixed rod, and the sealing ring is arranged in the annular groove, so that the lower end surface of the cleaning ball is tightly abutted against the upper end surface of the fixed rod, and dirt is prevented from entering the placement to breed bacteria and mold, thereby bringing about a hidden danger to the ear canal.

[0020] Preferably, the plurality of dirt suction openings are uniformly distributed in a circumferential array on the outer wall of the cleaning head; thus, dust and impurities in all directions in the ear canal can be sucked into the containing cavity through the dirt suction openings, and the ear canal is cleaned without dead angles.

[0021] Preferably, the plurality of mounting grooves are four in number and are uniformly distributed in a circumferential array on the inner wall of the placement groove; thus, the connecting rod is more uniformly stressed when being pressed by the elastic sheet, and the connecting rod is more firmly clamped, and the user is safer and more convenient when cleaning the ear canal. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a perspective view of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0023] Figure 2 It is a partial sectional view of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0024] Figure 3 It is a sectional view of a fixed rod of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0025] Figure 4 It is a sectional view of a cleaning head of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0026] Figure 5 It is a perspective sectional view of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0027] Figure 6 It is a sectional view of a connecting rod inserted into a fixed rod of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent;

[0028] Figure 7 It is a sectional view of a connecting rod inserted into a fixed rod of an ear canal cleaner with a cleaning head convenient to replace according to the utility model patent; Figure 6 It is an enlarged view of A of the utility model patent.

[0029] The reference signs in the drawings of the specification comprise: 1, ear canal cleaner main body; 2, dirt guide pipe; 3, fixing rod; 4, placing groove; 5, connecting rod; 6, mounting groove; 7, sliding groove; 8, arc-shaped groove; 9, arc-shaped block; 10, first dirt guide hole; 11, second dirt guide hole; 12, dirt guide block; 13, cleaning head; 14, containing cavity; 15, dirt suction hole; 16, elastic sheet; 17, clamping groove; 18, long rod; 19, limiting block; 20, annular groove; 21, sealing ring. DETAILED DESCRIPTION

[0030] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] As Figures 1-7As shown, a kind of ear canal cleaner with cleaning head convenient to replace, including ear canal cleaner body 1, one end of ear canal cleaner body 1 is fixed with the guide dirt pipe 2, one end of guide dirt pipe 2 extends into the inside of ear canal cleaner body 1, the end of guide dirt pipe 2 away from ear canal cleaner body 1 is fixed with fixed rod 3, the upper end surface of fixed rod 3 is equipped with the placement slot 4, the detachable connection of placement slot 4 is connected with connecting rod 5, the upper end surface of fixed rod 3 is equipped with annular groove 20, annular groove 20 is equipped with sealing ring 21, so that dust cannot pass through the connecting rod rod 5 and the connecting place of fixed rod 3 into placement slot 4, prevent the bacteria in placement slot 4 from breeding, cause ear canal infection, one end of connecting rod 5 is fixed with cleaning head 13, cleaning head 13 is equipped with containing cavity 14, the outer wall of cleaning head 13 is equipped with several dirt suction holes 15, several dirt suction holes 15 are evenly distributed in the circumferential array of the outer wall of cleaning head 13, dirt suction hole 15 is communicated with containing cavity 14, when cleaning ear canal, dust and impurities can be inducted into containing cavity 14 through dirt suction hole 15 in all directions without dead angle, the inner wall of placement slot 4 is equipped with several installation grooves 6, the number of several installation grooves 6 is four, and is evenly distributed in the circumferential array of the inner wall of placement slot 4, the installation groove 6 is installed with the fixed assembly for fixing connecting rod 5, so that when clamping connecting rod 5, stress is more uniform, also more firm, the fixed assembly includes the spring piece 16 installed in the inner wall of installation groove 6, one end of spring piece 16 is fixed with the inner wall of installation groove 6, the other end of spring piece 16 is slidably connected in the inside of installation groove 6, the outer wall of connecting rod 5 is equipped with the clamping groove 17 for cooperating with spring piece 16, when replacing cleaning head 13, it is easy and convenient to operate, just need to directly pull cleaning head 13, then cleaning head 13 and fixed rod 3 can be disassembled, the lower side wall of installation groove 6 is equipped with sliding groove 7, the lower side wall of placement slot 4 is equipped with arc-shaped groove 8, the other end of arc-shaped groove 8 is communicated with sliding groove 7, the sliding groove 7 is slidably connected with the extrusion assembly for extruding fixed assembly, the extrusion assembly includes the long rod 18 slidably connected in sliding groove 7, the arc-shaped block 9 is slidably connected in arc-shaped groove 8, one end of arc-shaped block 9 is abutted with one end of long rod 18, the end of long rod 18 away from arc-shaped block 9 extends into installation groove 6 and is fixed with limit block 19, the upper end surface of limit block 19 is abutted with one end of spring piece 16, limit block 19 extrudes spring piece 16, spring piece 16 cannot shake in clamping groove 17, so that connecting rod 5 is clamped more firmly, the user is also safer and more comfortable when cleaning ear canal, the lower side wall of placement slot 4 is equipped with first dirt guide hole 10, first dirt guide hole 10 is communicated with guide dirt pipe 2, the upper end surface of connecting rod 5 is equipped with second dirt guide hole 11, the inner wall of containing cavity 14 is fixed with dirt guide block 12, the dirt guide block 12 is communicated with second dirt guide hole 11, so that dust and impurities can directly enter second dirt guide hole 11 along dirt guide block 12, dust and impurities will not remain in containing cavity 14,The first dirt guide hole 10 is coaxial with and communicates with the second dirt guide hole 11, the second dirt guide hole 11 communicates with the containing cavity 14, dust and impurities in the ear canal enter the containing cavity 14 through the dirt suction hole 15, and then enter the second dirt guide hole 11, the first dirt guide hole 10 and the dirt guide pipe 2 in turn along the dirt guide block 12, only the user needs to aim the cleaning head 13 at the dust and impurities in the ear canal, and the dust and impurities can be automatically cleaned, and the operation is simple.

[0032] From the above, the specific implementation manner of the utility model is as follows:

[0033] When the ear canal needs to be cleaned, firstly, the fan is turned on, the rotation of the fan causes negative pressure in the main body, the dust and impurities in the ear canal enter the containing cavity 14 through the dirt suction hole 15, and then enter the second dirt guide hole 11, the first dirt guide hole 10 and the dirt guide pipe 2 in turn along the dirt guide block 12 in the containing cavity 14, and enter the ear canal cleaner main body 1 through the dirt guide pipe 2, the dirt suction mode can suction the dust and impurities in the ear canal into the ear canal cleaner main body 1 in all directions without dead angle, when the cleaning head 13 needs to be replaced after cleaning, the cleaning head 13 is directly pulled, the cleaning head 13 drives the connecting rod 5 to move upwards, in the moving process of the connecting rod 5, one end of the elastic sheet 16 extrudes the outer wall of the connecting rod 5 until the connecting rod 5 is completely moved out of the placing groove 4, then according to the size of the ear canal of the user, the appropriate cleaning head 13 is selected, the connecting rod 5 is aligned with the placing groove 4, the cleaning head 13 is pressed, the cleaning head 13 drives the connecting rod 5 to be clamped into the placing groove 4, in the process that the connecting rod 5 enters the placing groove 4, one end of the elastic sheet 16 extrudes the outer wall of the connecting rod 5 until the outer wall of the elastic sheet 16 abuts against the inner wall of the clamping groove 17, and meanwhile the lower end surface of the connecting rod 5 abuts against the lower side wall of the placing groove 4, at this moment, the lower end surface of the connecting rod 5 drives the arc-shaped block 9, when the two ends of the arc-shaped block 9 are flush with the lower side wall of the placing groove 4, the end of the arc-shaped block 9 away from the connecting rod 5 drives the lower end of the long rod 18, the long rod 18 moves upwards along the sliding groove 7, the long rod 18 drives the limiting block 19 to move upwards, so that one side of the limiting block 19 abuts against one end of the elastic sheet 16, at this moment, the outer wall of the elastic sheet 16 is tightly combined with the inner wall of the clamping groove 17, the connecting rod 5 is effectively limited, and it is ensured that the connecting rod 5 cannot shake in use.

[0034] The above is only an embodiment of the utility model, and the specific structure and characteristics of the scheme and other common knowledge are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, a number of deformations and improvements can be made, which should be regarded as the protection range of the utility model, and these will not affect the effect and practicality of the utility model. The protection range of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. An ear canal cleaner with a cleaning head that is easy to replace, comprising an ear canal cleaner body (1), one end of the ear canal cleaner body (1) being fixedly connected with a dirt guide tube (2), one end of the dirt guide tube (2) extending into the inside of the ear canal cleaner body (1), characterized in that, The one end of the dirt guide pipe (2) away from the ear canal cleaner main body (1) is fixedly connected with a fixed rod (3), the upper end surface of the fixed rod (3) is provided with a placing groove (4), the placing groove (4) is detachably connected with a connecting rod (5), one end of the connecting rod (5) is fixedly connected with a cleaning head (13), the cleaning head (13) is provided with a containing cavity (14), the outer wall of the cleaning head (13) is provided with a plurality of dirt suction holes (15), the dirt suction holes (15) are communicated with the containing cavity (14), the inner wall of the placing groove (4) is provided with a plurality of installation grooves (6), the installation grooves (6) are installed with a fixing assembly for fixing the connecting rod (5), the lower side wall of the installation groove (6) is provided with a sliding groove (7), the lower side wall of the placing groove (4) is provided with an arc-shaped groove (8), the other end of the arc-shaped groove (8) is communicated with the sliding groove (7), the sliding groove (7) is slidably connected with a pressing assembly for pressing the fixing assembly, the lower side wall of the placing groove (4) is provided with a first dirt guide hole (10), the first dirt guide hole (10) is communicated with the dirt guide pipe (2), the upper end surface of the connecting rod (5) is provided with a second dirt guide hole (11), the first dirt guide hole (10) and the second dirt guide hole (11) are coaxial and communicated, and the second dirt guide hole (11) is communicated with the containing cavity (14).

2. The ear cleaner with a conveniently replaceable cleaning head according to claim 1, characterized in that The fixing assembly comprises a spring piece (16) installed on the inner wall of the installation groove (6), one end of the spring piece (16) is fixedly connected with the inner wall of the installation groove (6), and the other end of the spring piece (16) is slidably connected in the installation groove (6), and the outer wall of the connecting rod (5) is provided with a clamping groove (17) matched with the spring piece (16).

3. An ear cleaner with a conveniently replaceable cleaning head according to claim 2, characterized in that The pressing assembly comprises a long rod (18) slidably connected in the sliding groove (7), and an arc-shaped block (9) slidably connected in the arc-shaped groove (8), one end of the arc-shaped block (9) abuts against one end of the long rod (18), and the other end of the long rod (18) extends into the installation groove (6) and is fixedly connected with a limiting block (19), and the upper end surface of the limiting block (19) abuts against one end of the spring piece (16).

4. The ear cleaner with a conveniently replaceable cleaning head according to claim 1, characterized in that The inner wall of the containing cavity (14) is fixedly connected with a dirt guide block (12), and the dirt guide block (12) is communicated with the second dirt guide hole (11).

5. The ear cleaner with a conveniently replaceable cleaning head according to claim 1, characterized in that The upper end surface of the fixed rod (3) is provided with an annular groove (20), and the annular groove (20) is installed with a sealing ring (21).

6. The ear cleaner with a conveniently replaceable cleaning head according to claim 1, characterized in that A plurality of dirt suction holes (15) are uniformly distributed in a circumferential array on the outer wall of the cleaning head (13).

7. The ear cleaner with a conveniently replaceable cleaning head according to claim 1, characterized in that The number of the installation grooves (6) is four, and they are uniformly distributed in a circumferential array on the inner wall of the placing groove (4).

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