Implant sand blasting device

Abstract

The utility model discloses a sand blasting device for an implant. The sand blasting device comprises a rotating part and an adjusting part, the adjusting part comprises a sliding adjusting part, a rotary adjusting part is connected to the sliding adjusting part, a nozzle is connected to the rotary adjusting part, and a sand supply part is connected to the nozzle; an implant is mounted on the rotating part; the sliding adjusting part comprises a bottom plate, a mounting plate is arranged on the bottom plate, a sliding assembly is mounted on the mounting plate, and the sliding assembly is connected with the rotating adjusting part; the rotary adjusting part comprises a mounting shell, a rotary driving assembly is mounted on the mounting shell, a connecting shaft is connected to the rotary driving assembly, and a nozzle is connected to the connecting shaft. The device is simple to operate, does not need complex operation steps or professional skills, not only improves the working efficiency, but also reduces the operation difficulty, so that more dentists and oral cavity technicians can easily master and use the device, the roughness of the surface of the implant can be effectively controlled through the device, and the service life of the implant is prolonged. Therefore, the binding force between the implant and surrounding tissues can be enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sandblasting equipment, in particular to an implant sandblasting device. Background Art

[0002] A dental implant is a prosthesis that is implanted into the toothless area of ​​the patient's jaw to replace the tooth root. The implant is usually a vertebral body or a cylinder made of pure titanium or titanium alloy. It has a threaded shape and can form a close bone bond with the jawbone.

[0003] During the use of implants, the surface state of the implant will directly affect the strength of its bonding with the jawbone. In order to improve the bonding performance between the implant and the jawbone, the surface of the implant is often sandblasted, that is, a rough structure is formed on the surface of the implant. This rough structure can significantly improve the biocompatibility and stability of the implant, while reducing postoperative complications. The uniformity of the rough structure of the implant surface is crucial. The uniform surface structure helps the implant to closely bond with the bone tissue, improve the biocompatibility of the implant with the surrounding tissue, and avoid stress concentration.

[0004] At present, the surface sandblasting of the implant is often performed by a sandblasting machine. For example, the document with publication number CN208096830U discloses a horizontal implant sandblasting device, in which the implant is fixed on a bolt, and the implant on the bolt is adjusted to a height corresponding to the nozzle by a motor, and the nozzle is started for sandblasting. Although the device can sandblast the surface of the implant, the nozzle in the sandblasting device can only sandblast the implant at a single angle, and the roughness of the implant surface is easily inconsistent during the sandblasting process, thereby affecting the performance of the implant. Utility Model Content

[0005] In order to solve the problem that the sandblasting device in the prior art can only sandblast the implant at a single angle, which easily leads to inconsistent surface roughness of the implant, the utility model provides an implant sandblasting device.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses an implant sandblasting device, comprising a rotating part and an adjusting part;

[0008] The adjusting part comprises a sliding adjusting part, the sliding adjusting part is connected to a rotating adjusting part, the rotating adjusting part is connected to a nozzle, and the nozzle is connected to a sand supply part;

[0009] An implant is installed on the rotating part;

[0010] The sliding adjustment part comprises a bottom plate, a mounting plate is arranged on the bottom plate, a sliding assembly is mounted on the mounting plate, and the sliding assembly is connected to the rotation adjustment part;

[0011] The rotation regulating part comprises a mounting shell, a rotation driving assembly is mounted on the mounting shell, a connecting shaft is connected to the rotation driving assembly, and the connecting shaft is connected to the nozzle.

[0012] Preferably, the sliding assembly includes a screw rod, which is rotatably mounted on the mounting plate, one end of which is connected to a second motor, a screw rod nut is screwed onto the screw rod, and the screw rod nut is connected to the mounting housing.

[0013] Preferably, guide rails are provided on both sides of the screw rod on the mounting plate, and sliders are movably connected to the guide rails, and the sliders are connected to the mounting housing.

[0014] Preferably, the rotary drive assembly includes a third motor, the third motor is installed in the installation shell, a reducer is connected to the output shaft of the third motor, and the connecting shaft is connected to the output shaft of the reducer.

[0015] Preferably, the rotating part comprises a connecting shell, and a connecting cover is connected to the upper end of the connecting shell;

[0016] A driving member is installed in the connecting shell, and a mounting shaft is connected to the driving member, and the mounting shaft is rotatably installed in the connecting shell;

[0017] The installation shaft is connected with a connecting rod, the connecting rod passes through the connecting cover and extends out of the connecting shell, and the implant is installed on the connecting rod.

[0018] Preferably, the driving member comprises a first motor, the first motor is installed in the connecting housing, a coupling is connected to an output shaft of the first motor, and the coupling is connected to the mounting shaft.

[0019] Preferably, a base is connected to the bottom of the connection shell, an adjustment groove is provided on the base, a connecting part is installed in the adjustment groove, and the connecting part is connected to the bottom plate.

[0020] Preferably, a displacement groove is provided on the connecting shell, the displacement groove is perpendicular to the adjusting groove, and the connecting part is installed in the displacement groove and the adjusting groove.

[0021] Preferably, the connecting portion comprises a bolt, the bolt is mounted on the overlapping portion of the displacement groove on the bottom plate and the adjustment groove on the base, and a nut is connected to the bolt.

[0022] Preferably, a supporting foot is provided on the bottom end surface of the base.

[0023] Compared with the prior art, the utility model has the following beneficial technical effects:

[0024] The utility model discloses an implant sandblasting device, in which an implant is installed by a rotating part, so that the implant rotates horizontally, so that the implant surface can be sandblasted evenly, and then the sandblasting height of the nozzle is adjusted vertically by a sliding adjustment part in the adjustment part, so that the device can adapt to implants of different sizes and shapes, ensuring that the nozzle and the implant surface maintain an appropriate distance; at the same time, the rotating adjustment part is used to adjust the angle of the nozzle sandblasting, so as to obtain the best sandblasting effect, and the angle of the nozzle can be accurately adjusted according to the specific conditions of the implant surface and the sandblasting requirements, so that the sandblasting treatment can act more accurately on each surface of the implant, improve the treatment effect, and reduce unnecessary damage. In addition, the device is simple to operate, does not require complicated operating steps or professional skills, not only improves work efficiency, but also reduces the difficulty of operation, so that more dentists and oral technicians can easily master and use the device, and the roughness of the implant surface can be effectively controlled by the device, which helps to enhance the bonding between the implant and the surrounding tissues.

[0025] Furthermore, the sliding adjustment component in the device drives the nozzle to perform vertical linear motion through the cooperation of the screw and the screw nut. Due to the interaction between the screw thread and the screw nut, when the screw rotates, the screw nut can move accurately along the screw axis, thereby achieving precise adjustment of the nozzle sandblasting height. This precise adjustment ensures that the sandblasting process can accurately act on the specific area of ​​the implant, improving the accuracy and effect of the treatment; at the same time, since the structure of the screw and the screw nut is simple and reliable, with high mechanical strength and wear resistance, the sliding adjustment component can continue to work stably during long-term use, ensuring the continuity and stability of the implant sandblasting process.

[0026] Furthermore, the device is provided with guide rails on both sides of the screw rod, and sliders are provided on the guide rails. The sliders are connected to the mounting shell. Through the cooperation of the guide rails and the sliders, the nozzle can be better moved vertically along the screw rod, so that the nozzle movement is more stable and accurate, reducing shaking and deviation, thereby improving the stability of the entire device.

[0027] Furthermore, in the rotating part of the device, the connecting shaft is driven to rotate by the driving member, which in turn drives the connecting rod to rotate, so that the connecting rod drives the implant to rotate, ensuring that each surface of the implant can be evenly sandblasted, avoiding the problem of uneven treatment caused by fixed-position sandblasting. Uniform sandblasting helps to improve the uniformity of the roughness of the implant surface, thereby enhancing its biocompatibility and stability; and also reduces the number of repeated sandblasting and the required time, improves the efficiency of sandblasting, and reduces operating costs and time. At the same time, a connection cover is provided on the upper end face of the mounting shell, and the upper end face of the mounting shell can be sealed by the connection cover to prevent sand from falling from the upper end of the mounting shell during the sandblasting process, thereby affecting the service life of the driving member in the mounting shell of the device.

[0028] Furthermore, in the device, an adjustment groove is provided on the base, and a displacement groove is provided on the bottom plate. The distance between the implant and the nozzle can be adjusted through the displacement groove and the adjustment groove, and at the same time, the axis of the nozzle is intersected with the axis of the rotating part to ensure the sandblasting effect.

[0029] Furthermore, the device is provided with supporting feet on the base, and the supporting feet can enable the device to be stably placed on the platform, so that the device is not prone to shaking or tipping over, ensuring that the device can remain fixed during the sandblasting process to avoid affecting the sandblasting effect and accuracy due to movement or vibration; at the same time, during placement and use, the supporting feet can reduce the direct contact and friction between the base and the platform, thereby extending the service life of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of an implant sandblasting device provided by the utility model;

[0031] Figure 2 This is a front view structural schematic diagram of a base in an implant sandblasting device provided by the utility model;

[0032] Figure 3 This is a schematic diagram of the bottom structure of a base in an implant sandblasting device provided by the utility model;

[0033] Figure 4 This is a schematic structural diagram of a rotating part in an implant sandblasting device provided by the utility model;

[0034] Figure 5 for Figure 4 Cross-sectional view at AA in the middle;

[0035] Figure 6 This is a structural schematic diagram of a sliding adjustment part in an implant sandblasting device provided by the utility model;

[0036] Figure 7 for Figure 6Cross-section at the middle BB;

[0037] Figure 8 This is a structural schematic diagram of a rotary adjustment part in an implant sandblasting device provided by the utility model;

[0038] Fig. 9 for Figure 8 Cross-section at CC;

[0039] In the accompanying drawings: 1. base; 101. support foot; 102. mounting hole; 103. adjustment slot; 2. rotating part; 201. first motor; 202. connecting rod; 203. connecting cover; 204. upper bearing; 205. connecting shell; 206. mounting shaft; 207. lower bearing; 208. coupling; 3. sliding adjustment part; 301. second motor; 302. screw; 303. screw nut; 304. slider; 305. guide rail; 306. bottom plate; 307. mounting plate; 4. rotating adjustment part; 401. nozzle; 402. reducer; 403. mounting shell; 404. third motor; 405. connecting shaft; 406. hole shaft bearing; 5. connecting part; 6. implant. DETAILED DESCRIPTION

[0040] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0044] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0046] See also Figure 1 to Figure 9 The utility model discloses an implant sandblasting device, which comprises a base 1, on which a rotating part 2 and an adjusting part are mounted, the adjusting part is connected with a nozzle 401, and an implant 6 is mounted on the rotating part 2;

[0047] See also Figure 1~Figure 3 The base 1 is a rectangular flat plate, and a support foot 101 is respectively arranged at the four corners of the bottom end surface of the base 1. The base 1 is stably placed on the placement platform through the four support feet 101. A mounting hole 102 is arranged on the upper end surface of the base 1 near its left end surface, and an adjusting groove 103 is arranged near its right end surface. The length direction of the adjusting groove 103 is opened along the length direction of the base 1. A connecting part 5 is installed in the adjusting groove 103, and the connecting part 5 is connected to the bottom end surface of the adjusting part. The adjusting groove 103 allows the adjusting part to be horizontally adjusted on the base 1, thereby adjusting the distance between the nozzle 401 and the rotating part 2 to improve the sandblasting effect.

[0048] See also Figure 1 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The adjusting part includes a sliding adjusting part 3, the sliding adjusting part 3 is connected to a rotating adjusting part 4, the rotating adjusting part 4 is connected to a nozzle 401, and the nozzle 401 is connected to an abrasive material supply part;

[0049] See also Figure 1 , Figure 6 and Figure 7 The sliding adjustment part 3 includes a bottom plate 306, a displacement groove is arranged on the upper end surface of the bottom plate 306, and the displacement groove is connected to the connecting part 5, the bottom plate 306 is fixed on the base 1, and the long side of the displacement groove on the bottom plate 306 after fixing is perpendicular to the long side of the adjustment groove 103, a mounting plate 307 is vertically arranged on the upper end surface of the bottom plate 306, and a sliding component is arranged on one side end surface of the mounting plate 307, and the sliding component is connected to the rotation adjustment part 4;

[0050] Among them, the sliding assembly includes a screw rod 302, which is vertically rotatably installed on the side end face of the mounting plate 307, and a second motor 301 is connected to the upper end of the screw rod 302. The second motor 301 is fixedly connected to the upper end of the mounting plate 307, and the output shaft of the second motor 301 is vertically downwardly arranged. A screw nut 303 is screwed on the screw rod 302, and the screw nut 303 is connected to the rotation adjustment part 4. The screw rod 302 is rotated by the rotation of the second motor 301, and then the screw nut 303 is vertically moved relative to the mounting plate 307, thereby driving the rotation adjustment part 4 to move vertically, so that the nozzle 401 can be adjusted according to the height of the implant 6 and vertically moved to sandblast the surface of the implant 6, so that the sandblasting of the surface of the implant 6 is more uniform.

[0051] Preferably, two guide rails 305 are provided on the end surface of the mounting plate 307 on which the screw rod 302 is mounted. The two guide rails 305 are distributed on both sides of the screw rod 302, and the guide rails 305 are parallel to the screw rod 302. Each guide rail 305 is movably connected to a slider 304, and the slider 304 is connected to the rotation adjustment part 4. When the screw rod 302 drives the rotation adjustment part 4 to move vertically, the rotation adjustment part 4 can move vertically on the mounting plate 307 better through the cooperation between the guide rail 305 and the slider 304, so that the movement of the rotation adjustment part 4 is more stable and accurate, and the shaking and deviation of the rotation adjustment part 4 are reduced, thereby improving the stability of the entire device.

[0052] See also Figure 1The connecting part 5 includes a bolt, which is vertically installed on the overlapping part of the displacement groove on the bottom plate 306 and the adjustment groove 103 on the base 1, and the upper end of the bolt passes through the adjustment groove 103 and the displacement groove in sequence from the bottom of the base 1, and extends to the outside from the upper end of the bottom plate 306. A nut is screwed on the upper end of the bolt, and one end face of the nut is attached to the upper end face of the bottom plate 306 to fix the bottom plate 306 and the base 1 together. Through the connection of the connecting part 5, the device can be easily installed and disassembled, and thus it is easy to carry and move.

[0053] See also Figure 1 , Figure 8 and Fig. 9 The rotation adjustment part 4 includes a mounting shell 403, which connects the screw nut 303 and the slider 304. A rotation drive assembly is installed in the mounting shell 403, and a connecting shaft 405 is connected to the rotation drive assembly. A hole shaft bearing 406 is installed on the connecting shaft 405. A mounting shaft hole is horizontally arranged on the mounting shell 403, and the mounting shaft hole is vertically mounted on the mounting plate 307. The connecting shaft 405 and the hole shaft bearing 406 are installed in the mounting shaft hole. The connecting shaft 405 is rotated in the mounting shaft hole through the hole shaft bearing 406. The nozzle 401 is connected to the connecting shaft 405, and then the driving assembly is used to rotate the nozzle 401 on the mounting shell 403. The angle of the nozzle 401 is precisely adjusted according to the specific conditions of the surface of the implant 6 and the sandblasting requirements, so that the sandblasting treatment can act more accurately on a specific area of ​​the implant 6, thereby improving the treatment effect.

[0054] See also Fig. 9 The rotation drive component includes a third motor 404, which is installed in the installation shell 403, and the output shaft of the third motor 404 is output downward. The output shaft of the third motor 404 is connected with a reducer 402, and the output shaft of the reducer 402 is connected to the above-mentioned connecting shaft 405. The power is provided by the third motor 404, and then the provided power is reduced by the reducer 402, so that when the power drives the connecting shaft 405 to rotate, it can rotate smoothly and at a uniform speed.

[0055] See also Figure 1 , Figure 4 and Figure 5The rotating part 2 includes a connecting shell 205, which is a hollow stepped cylinder, and the diameter of the stepped main body at the lower end of the outer wall of the stepped cylinder is large, and the diameter of the stepped cylinder at the upper end is small. The diameter of the lower end cylinder and the inner hole of the connecting shell 205 is large, and the diameter of the upper cylinder is small. At the same time, the upper inner hole of the connecting shell 205 is a stepped hole with large ends and a small middle; the bottom of the connecting shell 205 is installed in the mounting hole 102 of the base 1, and a connecting cover 203 is connected to the upper end face of the connecting shell 205. The connecting cover 203 is used to close the upper end port of the connecting shell 205 to prevent sand from falling into it from the upper end of the connecting shell 205 during sandblasting, affecting the use of the components installed in the connecting shell 205.

[0056] See also Figure 5 A driving member is installed in the connecting shell 205, and a mounting shaft 206 is connected to the driving member. An upper bearing 204 is installed on the upper end of the mounting shaft 206, and a lower bearing 207 is installed on the lower end of the mounting shaft 206. The upper bearing 204 is installed in a step hole in the inner cavity of the upper column near its upper end, and the lower bearing 207 is installed in a step hole in the inner cavity of the upper column near its lower end. The mounting shaft 206 is vertically rotatably installed in the connecting shell 205 through the upper bearing 204 and the lower bearing 207; a blind hole is provided on the upper end of the mounting shaft 206, and a thread is provided in the blind hole. The lower end of the connecting rod 202 is connected to the blind hole through the thread. The upper end of the connecting rod 202 passes through the connecting cover 203 and extends out of the connecting shell 205. The implant 6 is installed on the upper end of the connecting rod 202.

[0057] See also Figure 5 The driving member includes a first motor 201, which is installed in a connecting shell 205, and the output shaft of the first motor 201 is vertically upward. A coupling 208 is connected to the output shaft of the first motor 201, and the upper end of the coupling 208 is connected to the lower end of the above-mentioned installation shaft 206. The installation shaft 206 is rotated by the first motor 201, and then the implant 6 is rotated, so that the surface of the implant 6 can be evenly sandblasted.

[0058] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0059] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. An implant sandblasting device, characterized in that: It comprises a rotating part (2) and an adjusting part; The adjusting portion comprises a sliding adjusting portion (3), the sliding adjusting portion (3) is connected to a rotating adjusting portion (4), the rotating adjusting portion (4) is connected to a nozzle (401), and the nozzle (401) is connected to an abrasive material supply portion; An implant (6) is mounted on the rotating portion (2); The sliding adjustment portion (3) comprises a bottom plate (306), a mounting plate (307) is provided on the bottom plate (306), a sliding component is mounted on the mounting plate (307), and the sliding component is connected to the rotation adjustment portion (4); The rotation regulating portion (4) comprises a mounting shell (403), a rotation driving assembly being mounted on the mounting shell (403), a connecting shaft (405) being connected to the rotation driving assembly, and the connecting shaft (405) being connected to the nozzle (401).

2. The implant sandblasting device according to claim 1, characterized in that: The sliding assembly comprises a screw rod (302), the screw rod (302) being rotatably mounted on the mounting plate (307), one end of the screw rod (302) being connected to a second motor (301), a screw rod nut (303) being screwed onto the screw rod (302), and the screw rod nut (303) being connected to the mounting housing (403).

3. The implant sandblasting device according to claim 2, characterized in that: Guide rails (305) are provided on the mounting plate (307) at both sides of the screw rod (302), and sliders (304) are movably connected to the guide rails (305), and the sliders (304) are connected to the mounting housing (403).

4. The implant sandblasting device according to claim 1, characterized in that: The rotary drive assembly comprises a third motor (404), the third motor (404) being installed in the installation housing (403), the output shaft of the third motor (404) being connected to a reducer (402), and the output shaft of the reducer (402) being connected to the connecting shaft (405).

5. The implant sandblasting device according to claim 1, characterized in that: The rotating part (2) comprises a connecting shell (205), and the upper end of the connecting shell (205) is connected to a connecting cover (203); A driving member is installed in the connecting shell (205), a mounting shaft (206) is connected to the driving member, and the mounting shaft (206) is rotatably installed in the connecting shell (205); The installation shaft (206) is connected to a connecting rod (202), the connecting rod (202) passes through the connecting cover (203) and extends out of the connecting shell (205), and the implant (6) is installed on the connecting rod (202).

6. The implant sandblasting device according to claim 5, characterized in that: The driving member comprises a first motor (201), the first motor (201) being installed in the connecting housing (205), a coupling (208) being connected to an output shaft of the first motor (201), and the coupling (208) being connected to the mounting shaft (206).

7. The implant sandblasting device according to claim 5, characterized in that: The bottom of the connection shell (205) is connected to a base (1), an adjustment groove (103) is provided on the base (1), a connection part (5) is installed in the adjustment groove (103), and the connection part (5) is connected to the bottom plate (306).

8. The implant sandblasting device according to claim 7, characterized in that: The connection housing (205) is provided with a displacement groove, the displacement groove is perpendicular to the adjustment groove (103), and the connection portion (5) is installed in the adjustment groove (103) within the displacement groove.

9. The implant sandblasting device according to claim 8, characterized in that: The connecting portion (5) comprises a bolt, the bolt being mounted on the overlapping portion of the displacement groove on the bottom plate (306) and the adjustment groove (103) on the base (1), and a nut being connected to the bolt.

10. The implant sandblasting device according to claim 8, characterized in that: A support foot (101) is provided on the bottom end surface of the base (1).

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