Electric bed frame with anti-pinch cover

Abstract

The utility model relates to an electric bed frame with an anti-pinch cover. A bearing plate set of an existing bed frame is prone to causing clamping injury accidents during movement, and the use safety is affected. The anti-pinch device comprises a frame body and a bearing plate set arranged on the frame body, the bearing plate set comprises a fixed part fixedly connected with the frame body and a movable part movably installed on the fixed part, and a deformable anti-pinch cover is arranged between the movable part and the frame body. And the anti-pinch cover telescopically deforms and blocks an opening generated by relative movement between the movable part and the frame body. The deformable anti-pinch cover is arranged between the movable part and the rack body to block the opening, so that the situation that an infant or a pet is pinched by the movable part and the rack body due to the fact that the infant or the pet enters the opening by mistake is prevented, potential safety hazards are effectively eliminated, foreign matter is prevented from entering the opening, the movable part and the rack body are prevented from being damaged due to the fact that the foreign matter is clamped, and the movable part and the rack body are protected; the movable part can move freely, and damage hidden dangers are eliminated.

Description

Technical Field

[0001] This utility model relates to the field of bedding, specifically to an electric bed frame. Background Technology

[0002] Existing bed frames include a frame and a support plate assembly mounted on the frame. The support plate assembly is electrically driven and includes a fixed part and a movable part that can move relative to the fixed part. The movable part moves and forms a variable support surface with the fixed part to ensure comfortable support for the user in different scenarios. The fixed part is fixed to the frame, and the movable part can move relative to the fixed part. This causes an opening of variable size to appear between the movable part and the frame due to changes in the position of the movable part. When the movable part moves closer to the frame, young children or pets may be pinched and injured because they are located at the opening, posing a safety hazard and affecting the user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an electric bed frame with an anti-pinch cover. A deformable anti-pinch cover is installed between the movable part and the frame to seal the opening, which not only prevents children or pets from entering the opening and getting pinched, effectively eliminating safety hazards, but also prevents foreign objects from entering the opening, ensuring that the movable part can move freely, and protecting both the movable part and the frame.

[0004] This utility model is achieved through the following method: an electric bed frame with an anti-pinch cover, comprising a frame body and a support plate assembly disposed on the frame body. The support plate assembly includes a fixed part fixedly connected to the frame body and a movable part movably mounted on the fixed part. A deformable anti-pinch cover is provided between the movable part and the frame body. The anti-pinch cover extends and deforms to seal the opening created by the relative movement of the movable part and the frame body. By providing a deformable anti-pinch cover between the movable part and the frame body to seal the opening, this design prevents children or pets from accidentally entering the opening and being pinched by the movable part and the frame body, effectively eliminating safety hazards. It also prevents foreign objects from entering the opening and prevents damage to the movable part and the frame body from trapping foreign objects, thus protecting the movable part and the frame body and ensuring the movable part can move freely, eliminating the risk of damage.

[0005] Preferably, the anti-pinch cover is C-shaped, comprising two symmetrically arranged side covers that open and close in a fan shape, an outer end cover spanning the outer edges of the side covers, and a C-shaped fixed frame. The anti-pinch cover can be linked with the movable part and can switch between an open state (fan-shaped) and a closed state (straight-line). The movable part is located at the front and rear of the frame and is swayably mounted on the fixed part. When the movable part sways, the end edge and side edge of the movable part separate from the frame and form the opening. The side covers are used to seal the area corresponding to the opening between the side edge of the movable part and the frame, and the outer end cover is used to seal the area corresponding to the opening between the end edge of the movable part and the frame. The anti-pinch cover can guide deformation and maintain its shape through the fixed frame, ensuring that the anti-pinch cover can deform according to the size of the opening and that it can completely seal the opening, thereby preventing children, pets, or foreign objects from entering the opening.

[0006] Preferably, when the anti-pinch cover is in the folded state, the shaping frame is vertically stacked and guides the side cover and outer end cover to fold and fold. The shaping frame is used to guide the anti-pinch cover to be stacked in a preset manner, effectively reducing the volume of the anti-pinch cover when it is switched to the folded state, ensuring that the movable part can swing downward and connect with the fixed part, and also plays a shaping role for the anti-pinch cover to prevent the anti-pinch cover from undergoing horizontal deformation.

[0007] Preferably, when the anti-pinch cover is in the unfolded state, the fixed frame swings and unfolds around the inner edge of the anti-pinch cover to ensure that the anti-pinch cover can swing synchronously with the moving part and completely seal the opening.

[0008] Preferably, the side covers and outer end covers are provided with creases formed by reciprocating bending, and the shaping frame is embedded and fixed within the creases to guide the opening and closing of the anti-pinch cover. The creases serve to conceal the installation of the shaping frame, ensuring that the anti-pinch cover is folded precisely based on the creases. This not only protects the anti-pinch cover from damage due to disordered folding, but also effectively reduces the volume of the folded anti-pinch cover, ensuring that the movable part can accurately swing to switch to the folded state and connect flush with the fixed part.

[0009] Preferably, the top of the anti-pinch cover is provided with an upper plate fixedly connected to the corresponding movable part, and the bottom of the anti-pinch cover is provided with a lower plate fixedly connected to the corresponding area of ​​the frame, so that the anti-pinch cover spans between the movable part and the frame and opens and closes synchronously with the movable part. The upper plate not only serves to fix the top of the anti-pinch cover and the movable part, but also to limit the top of the anti-pinch cover, ensuring that the top of the anti-pinch cover remains in a straight line, which is conducive to the uniform force on each section of the top of the anti-pinch cover and precise opening and closing switching. The upper plate and the lower plate are fixedly connected to the movable part and the frame respectively, ensuring that the anti-pinch cover can move with the movable part and completely cover the opening.

[0010] Preferably, the lower plate is C-shaped, with several downwardly bent connecting pieces along its edge. The lower plate overlaps the top of the frame and is secured to the side wall of the frame via fasteners passing through the connecting pieces. The lower plate serves to secure the bottom of the anti-pinch cover to the frame and also limits the bottom of the anti-pinch cover, ensuring it remains straight. This facilitates even stress distribution across the bottom sections of the anti-pinch cover and ensures its secure connection to the frame. The connecting pieces are fitted snugly against the side wall of the frame, preventing wear between the fasteners passing through the connecting pieces and the anti-pinch cover.

[0011] Preferably, the fixing part is a hip support plate, which is horizontally fixed to the middle of the top surface of the frame. The hip support plate is fixed to the frame, which not only ensures that the support plate assembly is firmly connected to the frame, but also supports and limits the moving parts, ensuring that the moving parts can move precisely relative to the frame. This effectively utilizes the anti-pinch cover to seal the opening, and also protects the anti-pinch cover, extending its service life.

[0012] Preferably, the movable part is a back support plate, and the anti-pinch cover is a front cover disposed between the back support plate and the frame. The rear edge of the back support plate is rotatably mounted on the front edge of the hip support plate via a front hinge. The upper plate of the front cover is U-shaped and is fixedly connected to the edge of the back support plate. The lower plate of the front cover is fixedly connected to the front edge of the frame. The top edge of the outer end of the front cover is fixedly connected to the front edge of the back support plate, so that the front cover can be opened and closed with the front hinge as the center and seal the opening. The back support plate supports the user's back and is movable to meet the user's support needs under different working conditions. A front cover is provided between the back support plate and the frame. Since the back support plate is an integral structure, the top of the front cover is fixed to the corresponding edge of the back support plate through the upper plate, and the bottom of the front cover is fixed to the corresponding edge of the frame through the lower plate. This allows the front cover to open and close synchronously when the back support plate swings and switches with the front hinge as the center, ensuring that the opening between the back support plate and the frame can be completely sealed by the front cover.

[0013] Preferably, the movable part is a leg support plate and a foot support plate that are rotatably connected, and the anti-pinch cover is a rear cover disposed between the leg support plate, the foot support plate and the frame. The front edge of the leg support plate is rotatably mounted on the rear edge of the hip support plate through a rear hinge. The lower plate of the rear cover is fixedly connected to the rear edge of the frame. The upper plate of the rear cover consists of multiple pieces and is fixedly connected to the leg support plate and the foot support plate respectively. An elastic cloth is provided between the top edge of the anti-pinch cover and the upper plate. The anti-pinch cover is switched to open and close with the rear hinge as the center. The top edge of the outer end of the rear cover is fixedly connected to the rear edge of the foot support plate, so that the opening between the leg support plate, the foot support plate and the frame is completely sealed by the rear cover with elastic cloth. The front edge of the leg support is swayably mounted on the rear edge of the hip support, and the front edge of the foot support is swayably mounted on the rear edge of the leg support. The leg support and foot support work together to support the user's legs and feet. Since the leg support and foot support can move relative to each other, the upper plate is set as a split structure and fixed to the leg support and foot support respectively. An elastic cloth is set between the top edge of the side cover of the rear cover and the corresponding upper plate to counteract the relative movement between the upper plates. The elastic cloth is used to transmit the force from the leg support and foot support to ensure that the rear cover can open and close synchronously. The deformable elastic cloth is also used to seal the local area of ​​the opening formed between the top edge of the rear cover, the leg support and the foot support, to ensure that the opening can be completely sealed without affecting the free movement between the leg support and the foot support.

[0014] Preferably, the upper plate is provided with equally spaced fixing holes, through which fasteners pass and are fixed to the corresponding movable parts. The fixing holes are used to secure the fasteners, ensuring that the upper plate and the corresponding movable parts are fitted and fixed together, thereby ensuring that the top edge of the anti-pinch cover is firmly connected to the edge of the corresponding movable part, and preventing the opening from being ineffectively sealed due to partial lack of fit and fixation between the top edge of the anti-pinch cover and the corresponding movable part.

[0015] The outstanding beneficial effects of this utility model are as follows: A deformable anti-pinch cover is installed between the movable part and the frame to seal the opening, which not only prevents children or pets from being pinched by the movable part and the frame due to accidental entry into the opening, effectively eliminating safety hazards, but also prevents foreign objects from entering the opening and preventing damage to the movable part and the frame due to the trapping of foreign objects, thus protecting the movable part and the frame and ensuring that the movable part can move freely, eliminating the risk of damage. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the bed frame when the movable part is in the unfolded state.

[0017] Figure 2 This is a structural diagram of the bed frame when the movable part is in the retracted state.

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the bed frame;

[0019] Figure 4 This is a front view of the disassembled structure of the bed frame;

[0020] In the diagram: 1. Frame, 2. Support plate assembly, 3. Fixed frame, 4. Side cover, 5. Outer end cover, 6. Upper plate, 7. Lower plate, 8. Connecting piece, 9. Hip support plate, 10. Back support plate, 11. Leg support plate, 12. Foot support plate, 13. Front cover, 14. Rear cover, 15. Elastic fabric, 16. Front hinge, 17. Rear hinge. Detailed Implementation

[0021] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 and 2 An electric bed frame with an anti-pinch cover is shown, comprising a frame body 1 and a support plate assembly 2 disposed on the frame body 1. The support plate assembly 2 includes a fixed part fixedly connected to the frame body 1 and a movable part movably mounted on the fixed part. A deformable anti-pinch cover is provided between the movable part and the frame body 1. The anti-pinch cover extends and deforms to seal the opening created by the relative movement of the movable part and the frame body 1. The deformable anti-pinch cover between the movable part and the frame body 1 seals the opening, preventing children or pets from being pinched by the movable part and the frame body 1 due to accidental entry, effectively eliminating safety hazards. It also prevents foreign objects from entering the opening, preventing damage to the movable part and the frame body 1 due to the trapping of foreign objects, thus protecting the movable part and the frame body 1, ensuring the movable part can move freely, and eliminating the risk of damage.

[0023] In actual operation, the anti-pinch cover is C-shaped, including two symmetrically arranged side covers 4 that open and close in a fan shape, an outer end cover 5 spanning the outer edges of the side covers 4, and a C-shaped shaping frame 3. The anti-pinch cover can be linked with the movable part and can switch between an open state (fan-shaped) and a closed state (straight-line). The side covers 4 are fan-shaped and can open and close with the included angle as the center. The shaping frames 3 are all C-shaped, with the ends of the shaping frames 3 radially passing through the side covers 4 and extending to the included angle, and the middle section horizontally passing through the outer end cover 5. The shaping frames 3 not only serve to shape the anti-pinch cover, but also reduce the volume of the anti-pinch cover by stacking the shaping frames 3, thereby ensuring precise switching between the closed and open states of the anti-pinch cover. The movable part swings around its inner edge connected to the fixed part, and the outer edge of the movable part is always parallel to the edge of the frame 1, so that the two can be connected by a square outer end cover 5 and cover the corresponding area of ​​the opening. The side edge of the movable part and the side edge of the frame 1 form a fan shape with a variable angle, so that the two can be connected by a fan-shaped and openable side cover 4 and cover the corresponding area of ​​the opening.

[0024] In actual operation, when the anti-pinch cover is in the retracted state, the sizing frame 3 is vertically stacked and guides the side cover 4 and outer end cover 5 to fold and retract. The sizing frame 3 can guide the anti-pinch cover to fold precisely when switching to the retracted state, which not only effectively reduces the volume of the anti-pinch cover and ensures that the movable part will not get stuck due to the anti-pinch cover not being folded in place, but also effectively hides the anti-pinch cover and improves aesthetics. When the anti-pinch cover is in the unfolded state, the sizing frame 3 swings and unfolds with the inner edge of the anti-pinch cover as the center. Each sizing frame 3 is arranged radially along the side cover 4, and the included angle between adjacent sizing frames 3 tends to be the same, so that each fan-shaped area around the side cover 4 can be accurately positioned by the corresponding sizing frame 3, effectively improving the unfolding effect of the side cover 4, and thus can move synchronously with the movable part and completely cover the opening.

[0025] In actual operation, the side cover 4 and the outer end cover 5 are provided with creases formed by reciprocating bending. The shaping frame 3 is embedded and fixed in the creases to guide the opening and closing of the anti-pinch cover. The creases on the side cover 4 are arranged along its radial direction, and the creases on the outer end cover 5 are arranged horizontally along its length direction. The number of creases on the side cover 4 and the outer end cover 5 are the same and are arranged one by one, which not only facilitates the laying of the shaping frame 3, but also ensures that the side cover 4 and the outer end cover 5 open and close in conjunction.

[0026] In actual operation, the top of the anti-pinch cover is provided with an upper plate 6 fixedly connected to the corresponding movable part, and the bottom of the anti-pinch cover is provided with a lower plate 7 fixedly connected to the corresponding area of ​​the frame 1, so that the anti-pinch cover spans between the movable part and the frame 1 and opens and closes synchronously with the movable part. The top of the anti-pinch cover and the corresponding movable part are connected by the upper plate 6, and the bottom of the anti-pinch cover and the frame 1 are connected by the lower plate 7. The upper plate 6 and the lower plate 7 are used to seal the gaps between the anti-pinch cover and the movable part, as well as between the anti-pinch cover and the frame 1, to ensure that the opening is completely sealed. They are also used to transmit force, ensuring that the anti-pinch cover can move in tandem with the movable part, and thus freely switch between the retracted and extended states.

[0027] In actual operation, the upper plate 6 is provided with equally spaced fixing holes. Fasteners pass through the fixing holes and are fixed to the corresponding movable parts. The fixing holes are equally spaced along the upper plate 6. This not only improves the reliability of the fixing by increasing the number of fixing holes, but also ensures that each section of the top edge of the anti-pinch cover can be fixed to the movable part by increasing the density of the fixing holes, effectively eliminating the gap between the anti-pinch cover and the movable part.

[0028] In actual operation, the lower plate 7 is C-shaped, and its edge is provided with several downwardly bent connecting pieces 8. The lower plate 7 overlaps the top of the frame 1 and is fixedly locked to the side wall of the frame 1 by fasteners passing through the connecting pieces 8. The lower plate 7 is in contact with the top surface of the frame 1, and the connecting pieces 8 are in contact with the side wall of the frame 1 and fixed by fasteners, so that the bottom of the anti-pinch cover is fixed to the frame 1, thereby cooperating with the movable part to drive the anti-pinch cover to open and close. There are multiple connecting pieces 8, which are equidistantly distributed on the lower plate 7. The number of fasteners is increased to ensure that the lower plate 7 is reliably in contact with the top surface of the frame 1.

[0029] In actual operation, the fixed part is the hip support plate 9, which is horizontally fixed to the middle of the top surface of the frame 1. The movable parts are two in number and are respectively located on the front and rear sides of the hip support plate 9, including a back support plate 10 located on the front side of the hip support plate 9 and a leg support plate 11 and a foot support plate 12 located on the rear side of the hip support plate 9 (e.g.,...). Figure 3 As shown), there are also two anti-pinch covers, including a front cover 13 disposed between the back support plate 10 and the frame 1, and a rear cover 14 disposed between the leg support plate 11, the foot support plate 12 and the frame 1 (as shown). Figure 4 As shown, the back support plate 10, leg support plate 11, and foot support plate 12 can be independently moved to form a support surface that meets the usage scenario, and the corresponding openings are sealed by the front cover 13 and the rear cover 14 respectively.

[0030] In actual operation, the movable part is the back support plate 10, and the anti-pinch cover is the front cover 13 set between the back support plate 10 and the frame 1. The upper plate 6 of the front cover 13 is U-shaped and is fixedly attached to the edge of the back support plate 10. The lower plate 7 of the front cover 13 is fixedly attached to the front edge of the frame 1. The top edge of the outer end of the front cover 13 is fixedly attached to the front edge of the back support plate 10, so that the front cover 13 can open and close with the front hinge 16 as the center and block the opening. The back support plate 10 is an integral structure. The upper plate 6 is laid along the side and front edges of the bottom surface of the back support plate 10. The top edge of the front cover 13 is U-shaped and is tightly fitted and fixed to the side and front edges of the bottom surface of the back support plate 10. The bottom edge of the front cover 13 is U-shaped and is fitted and fixed to the front edge of the frame 1, so that the front cover 13 spans between the back support plate 10 and the frame 1 and effectively seals the opening between them. The rear edge of the back support plate 10 is rotatably mounted on the front edge of the hip support plate 9 through the front hinge 16, which not only limits the back support plate 10 to prevent it from detaching from the frame 1, but also guides the back support plate 10 to swing, ensuring that the shape of the front cover 13 when switched to the unfolded state can completely seal the opening formed between the back support plate 10 and the frame 1, thus improving the reliability of the shielding.

[0031] In actual operation, the movable part is the leg support plate 11 and foot support plate 12 rotatably connected. The anti-pinch cover is a rear cover 14 set between the leg support plate 11, foot support plate 12 and frame 1. The front edge of the leg support plate 11 is rotatably mounted on the rear edge of the hip support plate 9 through the rear hinge 17. The lower plate 7 of the rear cover 14 is fixedly connected to the rear edge of the frame 1. The upper plate 6 of the rear cover 14 consists of multiple pieces and is fixedly connected to the leg support plate 11 and foot support plate 12 respectively. The anti-pinch cover is opened and closed with the rear hinge 17 as the center. The outer top edge of the rear cover 14 is fixedly connected to the rear edge of the foot support plate 12 so that the opening between the leg support plate 11, foot support plate 12 and frame 1 is completely sealed by the rear cover 14 with elastic cloth 15. Because the leg support plate 11 and foot support plate 12 are designed to swing relative to each other, in order to ensure that the top of the rear cover 14 can fit snugly against the leg support plate 11 and foot support plate 12, the upper plate 6 is designed as a split structure and is fixed to the side edge of the leg support plate 11 and the side edge and rear edge of the foot support plate 12 respectively. An elastic cloth 15 is provided between the upper plate 6 and the top edge of the rear cover 14. The deformation properties of the elastic cloth 15 are used to cope with the relative movement between the leg support plate 11 and the foot support plate 12, so that the opening between the leg support plate 11, the foot support plate 12 and the frame 1 can be completely sealed by the rear cover 14 and the elastic cloth 15, thereby improving the reliability of the shielding.

[0032] In actual operation, the elastic fabric 15 can be set between the side edge of the rear cover 14, the side edge of the leg support plate 11, and the side edge of the foot support plate 12. The rear edge of the rear cover 14 is directly fixed to the rear edge of the foot support plate 12, which simplifies the structure and allows the rear edge of the foot support plate 12 to directly apply force to the rear cover 14, thereby ensuring that the rear cover 14 can match and move with the moving part.

Claims

1. An electric bed frame with an anti-pinch cover, comprising a frame (1) and a support plate assembly (2) disposed on the frame (1), characterized in that, The support plate assembly (2) includes a fixed part that is fixedly connected to the frame (1) and a movable part that is movably installed on the fixed part. A deformable anti-pinch cover is provided between the movable part and the frame (1). The anti-pinch cover expands and contracts and seals the opening between the movable part and the frame (1) caused by relative movement.

2. The electric bed frame with anti-pinch cover according to claim 1, characterized in that, The anti-pinch cover is shaped like a chamfer and includes two symmetrically arranged side covers (4) that open and close in a fan shape, an outer end cover (5) spanning the outer edges of the side covers (4), and a chamfer-shaped fixed frame (3). The anti-pinch cover can be linked with the movable part and can switch between opening and closing in a fan-shaped unfolded state and a straight-line folded state of the side covers (4).

3. The electric bed frame with anti-pinch cover according to claim 2, characterized in that, When the anti-pinch cover is in the retracted state, the shaped frame (3) is stacked vertically and guides the side cover (4) and the outer end cover (5) to fold and retract; or, when the anti-pinch cover is in the unfolded state, the shaped frame (3) swings and unfolds with the inner edge of the anti-pinch cover as the center.

4. The electric bed frame with anti-pinch cover according to claim 2, characterized in that, The side cover (4) and the outer end cover (5) are provided with creases formed by reciprocating bending. The shaping frame (3) is embedded and fixed in the creases to guide the opening and closing of the anti-pinch cover.

5. An electric bed frame with an anti-pinch cover according to any one of claims 1-4, characterized in that, The top of the anti-pinch cover is provided with an upper plate (6) that is fixedly connected to the corresponding movable part, and the bottom of the anti-pinch cover is provided with a lower plate (7) that is fixedly connected to the corresponding area of ​​the frame (1), so that the anti-pinch cover spans between the movable part and the frame (1) and opens and closes synchronously with the movable part.

6. An electric bed frame with an anti-pinch cover according to claim 5, characterized in that, The lower plate (7) is U-shaped, and the edge of the lower plate (7) is provided with several connecting pieces (8) formed by bending downwards. The lower plate (7) overlaps the top of the frame (1) and is fixedly locked to the side wall of the frame (1) by fasteners passing through the connecting pieces (8).

7. An electric bed frame with an anti-pinch cover according to claim 5, characterized in that, The fixing part is a hip support plate (9), which is fixed to the middle of the top surface of the frame (1) in a horizontal position.

8. An electric bed frame with an anti-pinch cover according to claim 7, characterized in that, The movable part is a back support plate (10), and the anti-pinch cover is a front cover (13) set between the back support plate (10) and the frame (1). The rear edge of the back support plate (10) is rotatably mounted on the front edge of the hip support plate (9) through a front hinge (16). The upper plate (6) of the front cover (13) is U-shaped and is fixedly attached to the edge of the back support plate (10). The lower plate (7) of the front cover (13) is fixedly attached to the front edge of the frame (1). The top edge of the outer end of the front cover (13) is fixedly attached to the front edge of the back support plate (10) so that the front cover (13) can open and close with the front hinge (16) as the center and block the opening.

9. An electric bed frame with an anti-pinch cover according to claim 7, characterized in that, The movable part consists of a leg support plate (11) and a foot support plate (12) that are rotatably connected. The anti-pinch cover is a rear cover (14) disposed between the leg support plate (11), the foot support plate (12), and the frame (1). The front edge of the leg support plate (11) is rotatably mounted on the rear edge of the hip support plate (9) via a rear hinge (17). The lower plate (7) of the rear cover (14) is fixedly connected to the rear edge of the frame (1). The upper plate (6) of the rear cover (14) The anti-pinch cover consists of multiple pieces, which are respectively fixed to the leg support plate (11) and the foot support plate (12). An elastic cloth (15) is provided between the top edge of the anti-pinch cover and the upper plate (6). The anti-pinch cover is switched to open and close with the rear hinge (17) as the center. The top edge of the outer end of the rear cover (14) is fixed to the rear edge of the foot support plate (12) so that the opening between the leg support plate (11), the foot support plate (12) and the frame (1) is completely sealed by the rear cover (14) with elastic cloth (15).

10. An electric bed frame with an anti-pinch cover according to claim 5, characterized in that, The upper plate (6) is provided with equally spaced fixing holes, and fasteners pass through the fixing holes and are fixed to the corresponding movable parts.

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