Operating bed support
By introducing components such as a track-shifting device and a protective plate box into the operating table support, the problems of inconvenient movement and poor stability of the operating table support have been solved, enabling flexible movement and stable positioning, improving surgical efficiency and safety, and extending the equipment's lifespan.
Patent Information
- Application Number
- CN202422847295.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing operating table supports suffer from problems such as inconvenience in movement, poor stability, and insufficient protective performance, making it difficult to meet the high standards required for modern surgery.
An operating table support was designed, comprising a rail-shifting device, rail-shifting components, mounting and fixing structure, telescopic cylinder, clamping and braking block, protective plate box, and other components, forming a moving system that enhances the operability and stability of the operating table. The protective plate box also protects key components and extends the equipment's lifespan.
It enables flexible movement and stable positioning of the operating table, improves the efficiency of surgical preparation and execution, ensures surgical safety and equipment protection, extends service life, and provides a cleaner and safer working environment.
Smart Images
Figure CN223601660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to surgical bed technical field, concretely is a surgical bed support. BACKGROUND
[0002] In the modern medical field, as one of the core equipment in the operating room, the performance and stability of the surgical bed are directly related to the smooth progress of the operation and the safety of the patient. With the continuous progress of medical technology and the increasing diversification of surgical needs, the requirements for the surgical bed and its support are also becoming higher and higher. The traditional surgical bed support often has problems such as inconvenient movement, poor stability, and insufficient protection, which is difficult to meet the high standard demand of modern surgery.
[0003] However, the existing surgical bed support often has problems such as inconvenient movement, poor stability, and insufficient protection, which does not meet the existing demand. Therefore, we propose a surgical bed support. INVENTION CONTENTS
[0004] The utility model aims at providing a kind of surgical bed support to solve the problems of existing surgical bed support inconvenient movement, poor stability and insufficient protection in the above background technology.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of surgical bed support, including surgical support assembly device, surgical support assembly device includes surgical support lower base and surgical support upper base, the built-in structure mounting groove is integrally formed on the surgical support lower base, the positioning hole groove is formed by lathe milling on the surgical support lower base, the power installation groove is integrally formed on the surgical support lower base, the side installation connecting structure is welded and connected on the both sides of the surgical support lower base, the auxiliary side installation connecting structure is welded and connected on the both sides of the surgical support lower base, the bolt groove is formed by lathe milling in the built-in structure mounting groove of the surgical support lower base, the side of surgical support lower base and surgical support upper base is surgical support assembly device side structure.
[0006] Preferably, the back of the surgical support lower base is provided with a rail moving device, and the rail moving device is fixedly connected with the back of the surgical support lower base, the rail moving device is provided with a rail moving component, and the rail moving component is fixedly connected with the back of the surgical support lower base, the back of the surgical support lower base is provided with a mounting fixed structure, and the mounting fixed structure is fixedly connected with the back of the surgical support lower base, the mounting fixed structure is provided with a telescopic cylinder, and the telescopic cylinder is fixedly connected with the mounting fixed structure, the shaft rod one end of the telescopic cylinder is provided with a clamping stop block, and the clamping stop block is fixedly connected with the shaft rod one end of the telescopic cylinder.
[0007] Preferably, the back of the lower base of the surgical support is provided with a protective plate box, and the protective plate box is fixedly connected with the back of the lower base of the surgical support.
[0008] Preferably, the built-in structure mounting groove of the lower base of the surgical support is provided with a power base plate, and the power base plate is fixedly connected with the built-in structure mounting groove, the power base plate is provided with a power base plate fixing bolt hole, and the power base plate fixing bolt hole is formed by turning and milling of a lathe, the built-in structure mounting groove of the lower base of the surgical support is provided with a center positioning bolt, and the center positioning bolt is fixedly connected with the built-in structure mounting groove of the lower base of the surgical support, and one side of the lower base of the surgical support is provided with a wire groove, and the wire groove is formed by turning and milling of a lathe.
[0009] Preferably, the upper base of the surgical support is provided with a structure groove, and the structure groove is integrally formed with the upper base of the surgical support.
[0010] Preferably, the lower base and the upper base of the surgical support are provided with a support interlayer, the support interlayer of the lower base and the upper base of the surgical support is provided with shock-absorbing cotton, and the shock-absorbing cotton is filledly connected with the support interlayer of the lower base and the upper base of the surgical support, and the support interlayer is provided with a fixed long bolt, and the fixed long bolt is embeddedly connected with the support interlayer.
[0011] Preferably, the four corners of the lower base of the surgical support are respectively provided with a front left supporting leg mounting groove, a front right supporting leg mounting groove, a rear left supporting leg mounting groove and a rear right supporting leg mounting groove, and the front left supporting leg mounting groove, the front right supporting leg mounting groove, the rear left supporting leg mounting groove and the rear right supporting leg mounting groove are integrally formed with the lower base of the surgical support, and the front left supporting leg mounting groove, the front right supporting leg mounting groove, the rear left supporting leg mounting groove and the rear right supporting leg mounting groove are provided with a supporting leg groove, and the supporting leg groove is formed by turning and milling of a lathe.
[0012] Compared with the prior art, the utility model has the advantages that:
[0013] 1. The utility model discloses a rail moving device, rail moving component, installation fixed structure, telescopic pneumatic cylinder, clamping stop block, protective plate box, telescopic protective plate are set up, and the rail moving device and the rail moving component on it jointly constitute the moving system of the operating bed support, so that the operating support can move along the specific track stably and flexibly. Greatly enhance the operability of the surgical equipment, so that medical staff can easily adjust the position of the operating bed to meet the needs of different surgical scenes. Reduce the burden of medical staff moving heavy objects, improve the efficiency of surgical preparation and operation. Make the operating bed can quickly adapt to different surgical layout and position requirement.
[0014] 2. The rail moving device and the rail moving component ensure the stability and safety of the operating bed during movement, avoiding shaking or tilting due to movement. The installation fixed structure provides a stable support platform for the telescopic pneumatic cylinder, and the telescopic pneumatic cylinder drives the clamping stop block through its shaft to brake or fix. When the operating bed needs to stay at a specific position, the clamping stop block tightly clamps the rail to ensure that the operating bed does not move randomly. The clamping stop block effectively prevents the operating bed from moving due to external force or misoperation during the operation, ensuring the safe operation of the operation. Medical staff can easily realize the braking and fixing of the operating bed by controlling the telescopic pneumatic cylinder, which is simple and convenient. Even in the case of uneven ground or external force impact, the clamping stop block can ensure the stability and safety of the operating bed.
[0015] 3. The protective plate box is embedded with telescopic protective plates, which protect the key components of the operating bed support, such as the rail moving component, from external contaminants such as dust and liquid. When not in use, the telescopic protective plates can be retracted to save space; when needed, they can be expanded to shield or protect the rail moving component. Effectively prolongs the service life of the operating bed support, reduces the failure or damage caused by external contaminants. Provides a more clean and orderly working environment for medical staff, which helps to improve the efficiency and quality of the operation. The protective plate also plays a certain safety protection role, avoiding direct contact between medical staff or patients and sharp components such as the rail moving component. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model discloses a surgical support lower base structure schematic diagram for the utility model discloses the surgical support upper base structure schematic diagram;
[0017] Figure 2 The utility model discloses a surgical support lower base structure schematic diagram for the utility model discloses the surgical support upper base structure schematic diagram;
[0018] Figure 3 The utility model discloses a rail moving device and surgical support lower base installation structure schematic diagram for the utility model discloses the rail moving device and surgical support lower base installation structure schematic diagram;
[0019] Figure 4 The utility model discloses a surgical support lower base structure schematic diagram for the utility model discloses the surgical support upper base structure schematic diagram;
[0020] Figure 5 It is the three-dimensional structure schematic view of the lower base of the operation support of the utility model;
[0021] Figure 6 It is the three-dimensional structure schematic view of the upper base of the operation support of the utility model;
[0022] Figure 7 It is the enlarged view of the structure at E of the utility model;
[0023] Figure 8 It is the enlarged view of the structure at A of the utility model;
[0024] Figure 9 It is the enlarged view of the structure at B of the utility model;
[0025] Figure 10 It is the enlarged view of the structure at C of the utility model;
[0026] Figure 11 It is the enlarged view of the structure at D of the utility model;
[0027] In the drawing: 1, operation support assembly device; 2, operation support lower base; 201, rail moving device; 202, rail moving component; 203, installation fixed structure; 204, telescopic air cylinder; 205, clamping stop block; 206, protection plate box; 207, telescopic protection plate; 3, built-in structure installation groove; 4, positioning hole groove; 5, power supply installation groove; 6, side installation connecting structure; 7, bolt groove; 8, auxiliary side installation connecting structure; 9, operation support upper base; 10, operation support assembly device side structure; 11, power supply base plate; 12, power supply base plate fixed bolt hole; 13, center positioning bolt; 14, wire slot; 15, structure groove; 16, support interlayer; 17, shock-absorbing buffer cotton; 18, fixed long bolt; 19, front left support leg installation groove; 20, front right support leg installation groove; 21, rear left support leg installation groove; 22, rear right support leg installation groove; 23, support leg groove. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0029] Please refer to Figures 1-11The utility model provides an embodiment: a surgical bed support, including surgical support assembly device 1, surgical support assembly device 1 includes surgical support lower base 2 and surgical support upper base 9, the built -in structure mounting groove 3 is integrally formed on surgical support lower base 2, and the positioning hole groove 4 is formed by lathe turning and milling on surgical support lower base 2, the power installation groove 5 is integrally formed on surgical support lower base 2, the both sides of surgical support lower base 2 are all welded and are connected with side installation connecting structure 6, the both sides of surgical support lower base 2 are all welded and are connected with auxiliary side installation connecting structure 8, the bolt groove 7 is formed by lathe turning and milling in the built -in structure mounting groove 3 of surgical support lower base 2, and the side of surgical support lower base 2 and surgical support upper base 9 is shown as surgical support assembly device side structure 10.
[0030] Please refer to Figure 3 The back of surgical support lower base 2 is provided with a rail moving device 201, and the rail moving device 201 is fixedly connected with the back of the surgical support lower base 2. The rail moving device 201 is provided with a rail moving member 202, and the rail moving member 202 is fixedly connected with the back of the surgical support lower base 2. The back of the surgical support lower base 2 is provided with a mounting and fixing structure 203, and the mounting and fixing structure 203 is fixedly connected with the back of the surgical support lower base 2. The mounting and fixing structure 203 is provided with a telescopic cylinder 204, and the telescopic cylinder 204 is fixedly connected with the mounting and fixing structure 203. One end of the shaft of the telescopic cylinder 204 is provided with a clamping stop block 205, and the clamping stop block 205 is fixedly connected with one end of the shaft of the telescopic cylinder 204. The rail moving device 201 and the rail moving member 202 thereon enable the surgical support lower base 2 to move along a specific track, enhancing the flexibility and operability of the surgical equipment, facilitating the adjustment of the equipment position during the operation. The surgical efficiency is improved, the burden of moving heavy objects for medical staff is reduced, and the stability and safety of the surgical equipment during the movement are ensured. The mounting and fixing structure 203 provides stable support for the telescopic cylinder 204, and the telescopic cylinder 204 drives the clamping stop block 205 to brake or fix through its shaft, ensuring that the surgical support can be stably stopped at a specific position when needed. The stability and safety of the surgical support are enhanced, preventing accidents caused by equipment movement during the operation, and also facilitating medical staff to quickly adjust and fix the equipment position as needed.
[0031] Please refer to Figure 3, the back of the lower base 2 of the surgical support is provided with a protective plate box 206, and the protective plate box 206 is fixedly connected with the back of the lower base 2 of the surgical support. The retractable protective plate 207 is arranged in the protective plate box 206, and the retractable protective plate 207 is embeddedly connected with the protective plate box 206. The retractable protective plate 207 is embedded in the protective plate box 206 and can be folded up when not in use and unfolded when needed to shield or protect the rail moving member 202 of the lower base 2 of the surgical support, preventing dust, liquid and the like from entering the internal structure. The protective performance of the surgical equipment is improved, the service life of the equipment is prolonged, and a safer and cleaner working environment is provided for medical staff.
[0032] Please refer to Figure 5 , the power base plate 11 is arranged in the built-in structure mounting groove 3 of the lower base 2 of the surgical support, and the power base plate 11 is fixedly connected with the built-in structure mounting groove 3 of the lower base 2 of the surgical support. The power base plate fixing bolt hole 12 is arranged on the power base plate 11, and the power base plate fixing bolt hole 12 is formed by turning and milling on the power base plate 11. The center positioning bolt 13 is arranged in the built-in structure mounting groove 3 of the lower base 2 of the surgical support, and the center positioning bolt 13 is fixedly connected with the built-in structure mounting groove 3 of the lower base 2 of the surgical support. One side of the lower base 2 of the surgical support is provided with a wire groove 14, and the wire groove 14 is formed by turning and milling on one side of the lower base 2 of the surgical support. The power base plate 11 provides a stable mounting platform for the power supply equipment, and the power base plate fixing bolt hole 12 facilitates the firm fixation of the power supply equipment on the base by bolts and other fasteners. The stability and safety of the power supply equipment are ensured, and power supply failure or damage caused by vibration or external force impact is prevented. The center positioning bolt 13 provides an accurate positioning point for the surgical support, facilitating alignment and connection with other components or equipment; the wire groove 14 is used for arranging and fixing wires, keeping the surgical area clean and orderly. The installation precision and stability of the surgical support are improved, and it is convenient for medical staff to manage and maintain the wires, reducing the safety hazards caused by messy wires.
[0033] Please refer to Figure 6 , the structure groove 15 is arranged on the upper base 9 of the surgical support, and the structure groove 15 is integrally formed with the upper base 9 of the surgical support. The structure groove 15 provides additional structural support and connection points for the upper base 9 of the surgical support, facilitating assembly and connection with other components or equipment. The structural strength and stability of the upper base 9 of the surgical support are enhanced, and convenience is provided for the expansion and upgrading of the equipment.
[0034] Please refer to Figure 7The support sandwich 16 is arranged in the lower base 2 and the upper base 9 of the operating support, the shock-absorbing cotton 17 is arranged in the support sandwich 16 of the lower base 2 and the upper base 9 of the operating support, and the shock-absorbing cotton 17 is filled and connected with the support sandwich 16 of the lower base 2 and the upper base 9 of the operating support, the fixed long bolt 18 is arranged in the support sandwich 16 and is embeddedly connected with the support sandwich 16, and the shock-absorbing cotton 17 filled in the support sandwich 16 can effectively absorb and disperse vibration and impact force, so as to protect the operating support and the internal components thereof from being damaged; the fixed long bolt 18 is used for firmly fixing the shock-absorbing cotton 17 in the support sandwich 16. The anti-seismic performance and durability of the operating support are improved, the equipment failure or damage caused by vibration or impact force is reduced, and a more comfortable and stable working environment is provided for medical staff.
[0035] Please refer to Figures 8 to 11 The front left supporting leg mounting groove 19, the front right supporting leg mounting groove 20, the rear left supporting leg mounting groove 21 and the rear right supporting leg mounting groove 22 are arranged on the four corners of the lower base 2 of the operating support and are integrally formed with the lower base 2 of the operating support, the supporting leg grooves 23 are arranged on the front left supporting leg mounting groove 19, the front right supporting leg mounting groove 20, the rear left supporting leg mounting groove 21 and the rear right supporting leg mounting groove 22, and the supporting leg grooves 23 are formed by turning and milling on the front left supporting leg mounting groove 19, the front right supporting leg mounting groove 20, the rear left supporting leg mounting groove 21 and the rear right supporting leg mounting groove 22, the four supporting leg mounting grooves and the supporting leg grooves 23 thereon provide stable supporting points for the operating support, so that the operating support can be stably placed on the ground and the height and stability thereof are adjusted through the supporting legs. The stability and load-bearing capacity of the operating support are enhanced, the equipment is prevented from being tilted or collapsed due to uneven ground or external impact, and a safer and more reliable working environment is provided for medical staff.
[0036] Working principle: in use, first, the operation support lower base 2 and the operation support upper base 9 are assembled together to form a complete operation bed support assembly device 1. Ensure that the built-in structure installation slot 3, the positioning hole slot 4, the power installation slot 5, and the two side installation connection structures 6 and the auxiliary side installation connection structure 8 on the operation support lower base 2 are intact and accurate in position. Install the power equipment in the power installation slot 5 of the operation support lower base 2, and use the power bottom plate fixing bolt hole 12 to firmly fix the power equipment on the base with bolts and other fasteners. Ensure stable connection of the power equipment, without looseness or shaking phenomenon. Install the rail moving device 201 on the back of the operation support lower base 2, and ensure that the rail moving member 202 is fixedly connected with the back of the operation support lower base 2. Install the fixing structure 203, and fix the telescopic air cylinder 204 on the fixing structure 203, ensure that the shaft rod of the telescopic air cylinder 204 is fixedly connected with the clamping stop block 205. Test the flexibility of the rail moving device 201 and the brake function of the telescopic air cylinder 204, ensure that the operation support can move smoothly along the specified track, and can be stably stopped at the specified position when needed. Install the guard plate box 206 on the back of the operation support lower base 2, and inlay the telescopic guard plate 207 in the guard plate box 206. Ensure that the telescopic guard plate 207 can be folded up when not in use, and unfolded when needed to shield or protect the rail moving member 202 of the operation support lower base 2. According to the positions of the front left support foot installation slot 19, the front right support foot installation slot 20, the rear left support foot installation slot 21, and the rear right support foot installation slot 22 on the operation support lower base 2, install the corresponding support feet. Ensure stable installation of the support feet, without looseness or shaking phenomenon, and the height and stability can be adjusted through the support feet.
[0037] When the surgical bed support needs to be moved, the surgical support is smoothly moved along a specific track by controlling the track moving member 202 on the track moving device 201. During the movement, the telescopic cylinder 204 is in a relaxed state, and the clamping stop block 205 does not contact the track, ensuring that the surgical support can move freely. When the surgical bed support moves to the desired position, the telescopic cylinder 204 is controlled to contract, so that the clamping stop block 205 tightly contacts the track and clamps it, ensuring that the surgical support does not move during the operation. At the same time, the telescopic protective plate 207 can be unfolded to shield or protect the track moving member 202 of the lower base 2 of the surgical support, preventing dust, liquid and other substances from entering the internal structure. Ensure that the power supply equipment works normally and provide stable power supply for the surgical bed support. Use the wire slot 14 to arrange and fix the wires, keep the surgical area clean and orderly. During the operation, the shock-absorbing cotton 17 in the support interlayer 16 can effectively absorb and disperse vibration and impact force, protecting the surgical support and its internal components from damage. The fixed long bolt 18 ensures that the shock-absorbing cotton 17 is firmly fixed in the support interlayer 16 and will not shift or fall off due to vibration or impact force. The four support foot mounting slots and the support foot slots 23 thereon provide stable support points for the surgical support, ensuring that the surgical support can be placed stably on the ground. Adjust the height and stability through the support feet, ensure that the surgical support remains stable during the operation. Check and replace worn or damaged parts to ensure the stability and safety of the surgical bed support.
[0038] It is obvious to those skilled in the art that the present application 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 essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.
[0039] The standard parts used in this article can be purchased from the market, and the specific connection mode of each part is connected by using the conventional bolt, rivet, welding and other conventional means in the prior art, and the mechanical, parts and equipment are of conventional type in the prior art, plus the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.
Claims
1. A surgical bed support comprising a surgical support assembly arrangement (1) consisting of a surgical support lower base (2) and a surgical support upper base (9), characterized in that: The lower base (2) of the surgical support is integrally formed with an internal structure mounting groove (3), the lower base (2) of the surgical support is formed with a positioning hole groove (4) by turning and milling on a lathe, the lower base (2) of the surgical support is integrally formed with a power supply mounting groove (5), both sides of the lower base (2) of the surgical support are welded with side mounting connection structures (6), both sides of the lower base (2) of the surgical support are welded with auxiliary side mounting connection structures (8), the internal structure mounting groove (3) of the lower base (2) of the surgical support is formed with a bolt groove (7) by turning and milling on a lathe, and the side surfaces of the lower base (2) of the surgical support and the upper base (9) of the surgical support are shown as a surgical support assembly device side structure (10).
2. A surgical bed support according to claim 1, wherein: The back surface of the lower base (2) of the surgical support is provided with a rail moving device (201), and the rail moving device (201) is fixedly connected with the back surface of the lower base (2) of the surgical support, the rail moving device (201) is provided with a rail moving component (202), and the rail moving component (202) is fixedly connected with the back surface of the lower base (2) of the surgical support, the back surface of the lower base (2) of the surgical support is provided with a mounting fixed structure (203), and the mounting fixed structure (203) is fixedly connected with the back surface of the lower base (2) of the surgical support, the mounting fixed structure (203) is provided with a telescopic cylinder (204), and the telescopic cylinder (204) is fixedly connected with the mounting fixed structure (203), one end of the shaft of the telescopic cylinder (204) is provided with a clamping stop block (205), and the clamping stop block (205) is fixedly connected with one end of the shaft of the telescopic cylinder (204).
3. A surgical bed support according to claim 1, wherein: The back surface of the lower base (2) of the surgical support is provided with a protection plate box (206), and the protection plate box (206) is fixedly connected with the back surface of the lower base (2) of the surgical support, the protection plate box (206) is provided with a telescopic protection plate (207), and the telescopic protection plate (207) is inlayed connection with the protection plate box (206).
4. A surgical bed support according to claim 1, wherein: The internal structure mounting groove (3) of the lower base (2) of the surgical support is provided with a power supply base plate (11), and the power supply base plate (11) is fixedly connected with the internal structure mounting groove (3), the power supply base plate (11) is provided with a power supply base plate fixed bolt hole (12), and the power supply base plate fixed bolt hole (12) is formed by turning and milling on a lathe, the internal structure mounting groove (3) of the lower base (2) of the surgical support is provided with a center positioning bolt (13), and the center positioning bolt (13) is fixedly connected with the internal structure mounting groove (3) of the lower base (2) of the surgical support, one side of the lower base (2) of the surgical support is provided with a wire groove (14), and the wire groove (14) is formed by turning and milling on a lathe.
5. A surgical bed support according to claim 1, wherein: The upper base (9) of the surgical support is provided with a structure groove (15), and the structure groove (15) is integrally formed with the upper base (9) of the surgical support.
6. A surgical bed support according to claim 1, wherein: The operating support lower base (2) and the operating support upper base (9) are provided with a support interlayer (16), the operating support lower base (2) and the operating support upper base (9) are provided with shock-absorbing cotton (17) in the support interlayer (16), and the shock-absorbing cotton (17) is connected with the support interlayer (16) of the operating support lower base (2) and the operating support upper base (9) by filling, the support interlayer (16) is provided with a fixed long bolt (18), and the fixed long bolt (18) is embeddedly connected with the support interlayer (16).
7. A surgical bed support according to claim 1, wherein: The operating support lower base (2) is provided with a front left supporting leg mounting groove (19), a front right supporting leg mounting groove (20), a rear left supporting leg mounting groove (21) and a rear right supporting leg mounting groove (22) at four corners, respectively, the front left supporting leg mounting groove (19), the front right supporting leg mounting groove (20), the rear left supporting leg mounting groove (21) and the rear right supporting leg mounting groove (22) are integrally formed with the operating support lower base (2), the front left supporting leg mounting groove (19), the front right supporting leg mounting groove (20), the rear left supporting leg mounting groove (21) and the rear right supporting leg mounting groove (22) are provided with a supporting leg groove (23), and the supporting leg groove (23) is formed by turning and milling of the front left supporting leg mounting groove (19), the front right supporting leg mounting groove (20), the rear left supporting leg mounting groove (21) and the rear right supporting leg mounting groove (22).