Indoor decoration skirting line
Through the split assembly structure and the design of the rotary tightening assembly, the existing skirting line is solved, and the convenient replacement and stable connection of skirting line is achieved, extending the service life and reducing dust entry.
Patent Information
- Application Number
- CN202421158371.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing skirtings are easily damaged and not easily replaced in daily use. Cement-adhering skirtings are easily damaged by collision at the connection between the wall and the ground, and are difficult to replace.
The interior decorative skirting board with a split assembly structure, including assembly hanging parts and hanging parts, is connected by the clamping method of upper and lower hanging strips and hook strips, and is replaced independently inside and outside. It uses rotary tightening components to achieve rapid fixing, making it easy to disassemble and assemble.
When external collision deformation, only the external part needs to be replaced without removing the interior, which improves the service life of the skirting board and facilitates replacement, avoids the impact on the assembly board, and reduces the possibility of dust entering.
Smart Images
Figure CN222350135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of skirting boards, in particular to an indoor decorative skirting board. Background Art
[0002] Skirting is a special term used in decoration. In the design of the room, the inner corner line, waist line and skirting play a role in visual balance. Using their linear feeling, material, color and other echoes in the room can achieve a better beautification and decoration effect.
[0003] However, the skirting in the prior art is usually adhered to the wall with cement. Since the skirting is located at the junction of the wall and the ground, it is easily damaged by long-term collisions during daily use, and the skirting adhered with cement is not easy to replace.
[0004] Therefore, there is an urgent need to provide an indoor decorative skirting to solve the defects and shortcomings in the prior art. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and provides an indoor decorative skirting.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] An indoor decorative skirting, including an assembly hanger connected to a wall, characterized in that: the assembly hanger includes an assembly plate, wherein an upper hanging bar and a lower hanging bar are respectively installed at the upper and lower ends of the assembly plate, and the middle part of the assembly plate protrudes in a direction away from the wall to form a convex bar, and also includes a hanging member assembled on the surface of the assembly hanger, the hanging member includes a hanging plate and an upper hook bar and a lower hook bar respectively fixedly connected to the upper and lower ends of the hanging plate, and the hanging plate is assembled on the surface of the assembly plate in a manner that the upper hook bar is assembled on the surface of the upper hanging bar and the lower hook bar is assembled on the surface of the lower hanging bar.
[0008] As a further preferred embodiment of the present invention, the upper and lower ends of the assembly plate are bent in the direction of the convex strip, and the upper hanging strip is fixed to the upper bent end of the assembly plate, and the lower hanging strip is fixed to the lower bent end of the assembly plate.
[0009] As a further preferred embodiment of the present invention, the lower portion of the lower hanging bar is bent toward the direction of the convex bar, and the bottom end of the lower hanging bar is in contact with the ground.
[0010] As a further preferred embodiment of the utility model, the lower portion of the hanging plate is curved to form an arc, and a rubber strip is sleeved on the outer side of the arc. When the hanging plate is assembled on the assembly plate, the rubber strip is in close contact with the ground.
[0011] As a further preferred embodiment of the present utility model, an assembly mechanism is arranged between the assembly plate and the hanging plate, and the assembly mechanism includes an upper push piece and a clamping assembly. The upper hook bar and the upper hanging bar, and the lower hook bar and the lower hanging bar are clamped by rotating the clamping assembly to cooperate with the upper push piece to open the distance between the lower hook bar and the convex bar.
[0012] As a further preferred embodiment of the present invention, an assembly opening is provided inside the hanging plate, and the pressing component can be operated to rotate through the assembly opening.
[0013] As a further preferred embodiment of the utility model, a plugging component is further included, wherein the plugging component includes a decorative surface, one side of the decorative surface is fixedly connected with an inlay block, wherein the inlay block is inlaid in the assembly opening and has an interference fit with the assembly opening.
[0014] As a further preferred embodiment of the utility model, the push-up member includes a slider, which slides with the track fixed on the back of the hanging plate through a track groove opened on the surface, and extension grooves are opened on both sides of the slider. The extension block is located inside the extension groove and slides with it, and the extension block is fixedly connected to the extension groove by a first elastic member.
[0015] As a further preferred embodiment of the utility model, the clamping assembly includes a cam, a screw and a nut, wherein the screw passes through the cam, and the screw is fixedly connected to the cam through nuts on both sides, a square bar is slidably inserted at the end of the screw, and a swivel arm is fixedly connected to the free end of the square bar, and a slot is provided on the surface of the mosaic block for engaging with the swivel arm.
[0016] As a further preferred embodiment of the utility model, a square groove is opened at the end of the screw rod, wherein a square bar slides inside the square groove, and a second elastic member is fixedly connected between the square groove and the square bar.
[0017] Compared with the prior art, the advantages and positive effects of the utility model are:
[0018] 1) The utility model provides an indoor decorative skirting, firstly, the assembly hanger is attached to the wall root to ensure that the lower part of the lower hanging strip is in close contact with the ground, the assembly board is nailed to the wall surface by nails, and then the upper hook strip and the upper hanging strip, the lower hook strip and the lower hanging strip are matched, and the hanging board is pressed downward to make the upper hook strip and the upper hanging strip, the lower hook strip and the lower hanging strip interference fit, and then the hanging board is fixed to the surface of the assembly board. Since the split assembly is adopted to make the skirting divided into inner and outer parts (i.e., the assembly hanger and the hanging part), when the outer part is deformed by collision, only the outer part needs to be replaced without removing the inner part, and because the inner and outer parts are only connected by a snap-fit method, it has the advantage of convenient disassembly and assembly.
[0019] 2) The utility model provides an indoor decorative skirting, which is provided with an assembly mechanism between an assembly plate and a hanging plate, and the distance between the lower hook strip and the convex strip is expanded by rotating a clamping assembly in cooperation with an upper push piece, so as to clamp the upper hook strip and the upper hanging strip, and the lower hook strip and the lower hanging strip; since the clamping assembly has an elliptical shape, it squeezes the upper push piece during the rotation process, causing the upper push piece to squeeze the convex strip upward, and the clamping assembly squeezes the lower hook strip downward, so that the lower hook strip can be tightly stuffed into the lower hanging strip, thereby achieving a quick fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A three-dimensional structural schematic diagram of an indoor decorative skirting line is provided for the utility model;
[0021] Figure 2 The utility model provides a schematic diagram of a partially disassembled state of an indoor decorative skirting line;
[0022] Figure 3 The utility model proposes a kind of indoor decorative skirting Figure 2 Schematic diagram from another angle;
[0023] Figure 4 The utility model proposes a kind of indoor decorative skirting Figure 1 A magnified image of point A;
[0024] Figure 5 The utility model proposes a kind of indoor decorative skirting Figure 2 The enlarged view of point B;
[0025] Figure 6 A partial schematic diagram of a blocking component in an indoor decorative skirting provided by the utility model;
[0026] Figure 7 The utility model provides a schematic diagram of a push-up member and a tightening component in an indoor decorative skirting;
[0027] Figure 8 The utility model provides an internal schematic diagram of an upward push-up member in an indoor decorative skirting;
[0028] Fig. 9 The utility model provides an internal schematic diagram of a tightening component in an indoor decorative skirting;
[0029] Legend: 1. Assembly hanger; 11. Assembly plate; 12. Raised strip; 13. Upper hanging strip; 14. Lower hanging strip;
[0030] 2. Suspension parts; 21. Hanging plate; 22. Upper hook strip; 23. Lower hook strip; 24. Bending arc; 3. Rubber strip;
[0031] 4. Assembly mechanism; 41. Assembly port;
[0032] 42. blocking component; 421. decorative surface; 422. inlaid block; 423. card slot;
[0033] 43, push-up member; 431, slider; 432, extension block; 433, extension slot; 434, first elastic member;
[0034] 44, abutting assembly; 441, cam; 442, screw rod; 443, nut; 444, square groove; 445, second elastic member; 446, square bar; 447, rotating arm;
[0035] 5. Track groove; 6. Track. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] [First embodiment]
[0040] like Figure 1-9The figure shows an indoor decorative skirting provided by the first embodiment of the utility model, comprising an assembly hanger 1 connected to the wall and a hanging part 2 assembled on the surface of the assembly hanger 1. Since the split assembly is adopted to divide the skirting into two parts, an inner part and an outer part (i.e., an assembly hanger and a hanging part), when the outer part is deformed by collision, only the outer part needs to be replaced without removing the inner part. Moreover, since the inner and outer parts are connected only by a snap-fit method, it has the advantage of convenient disassembly and assembly.
[0041] like Figure 1 -As shown, its specific structure is:
[0042] The assembly hanger 1 includes an assembly plate 11, wherein an upper hanging bar 13 and a lower hanging bar 14 are respectively installed at the upper and lower ends of the assembly plate 11, and the middle part of the assembly plate 11 protrudes in a direction away from the wall to form a convex bar 12, and also includes a hanging member 2 assembled on the surface of the assembly hanger 1, and the hanging member 2 includes a hanging plate 21 and an upper hook bar 22 and a lower hook bar 23 respectively fixedly connected to the upper and lower ends of the hanging plate 21, and the hanging plate 21 is assembled on the surface of the upper hanging bar 13 through the upper hook bar 22 and the lower hook bar 23 is assembled on the lower hanging bar 1 4 is assembled on the surface of the assembly plate 11 in a manner; during assembly, first attach the assembly hanger 1 to the wall base to ensure that the lower part of the lower hanging bar 14 is in close contact with the ground, nail the assembly plate 11 to the wall with a fixing piece such as a nail, then make the upper hook bar 22 correspond to the upper hanging bar 13, the lower hook bar 23 correspond to the lower hanging bar 14, press the hanging plate 21 downward to make the upper hook bar 22 and the upper hanging bar 13, the lower hook bar 23 and the lower hanging bar 14 engage (preferably engage in an interference fit), thereby fixing the hanging plate to the surface of the assembly plate.
[0043] As a preferred embodiment of the present invention, the upper and lower ends of the assembly plate 11 are bent in the direction of the convex strip 12, and the upper hanging strip 13 is fixed to the upper bent end of the assembly plate 11, and the lower hanging strip 14 is fixed to the lower bent end of the assembly plate 11. This arrangement allows the upper and lower ends of the assembly plate to be bent to pad the hanging plate so that there is a certain gap between the hanging plate and the wall, thereby avoiding the hanging plate from being close to the assembly plate, and further ensuring that the assembly plate is not affected when the hanging plate is deformed by collision, thereby ensuring the service life of the assembly plate. At the same time, the lower part of the lower hanging bar 14 is bent in the direction of the convex bar 12, and the bottom end of the lower hanging bar 14 is in contact with the ground. The bending of the lower hanging bar and the contact with the ground can effectively prevent dust from entering between the lower hanging bar and the wall; and the lower part of the hanging plate 21 is curved to form an arc 24, and the outer side of the arc 24 is covered with a rubber strip 3. When the hanging plate 21 is assembled on the assembly plate 11, the rubber strip 3 is close to the ground. This is because, firstly, the bending of the arc part can round the contact part between the hanging plate and the ground to facilitate later cleaning, and secondly, the rubber strip is tightly squeezed by the hanging plate on the ground and can undergo elastic deformation to further reduce the possibility of dust entering.
[0044] like Figure 6-9As shown, in this embodiment, an assembly mechanism 4 is further provided between the assembly plate 11 and the hanging plate 21. By providing the assembly mechanism between the assembly plate and the hanging plate, the distance between the lower hook strip and the convex strip is stretched by rotating the clamping assembly in cooperation with the upper push piece, so that the upper hook strip and the upper hanging strip, and the lower hook strip and the lower hanging strip are clamped; since the clamping assembly has an elliptical shape, it squeezes the upper push piece during the rotation process, causing the upper push piece to squeeze the convex strip upward, and the clamping assembly squeezes the lower hook strip downward, so that the lower hook strip can be tightly stuffed into the lower hanging strip, thereby achieving a quick fixing effect.
[0045] Specifically, in this embodiment, the assembly mechanism 4 includes an upper push member 43 and a tightening assembly 44. By rotating the tightening assembly 44 and cooperating with the upper push member 43 to expand the distance between the lower hook bar 23 and the convex bar 12, the upper hook bar 22 and the upper hanging bar 13, and the lower hook bar 23 and the lower hanging bar 14 are clamped. Figure 2 As shown, an assembly opening 41 is provided inside the hanging plate 21 , and the tightening assembly 44 can be operated to rotate through the assembly opening 41 .
[0046] Specifically, the specific composition of the assembly mechanism 4 in this embodiment is as follows:
[0047] It also includes a blocking component 42, which includes a decorative surface 421, and a mosaic block 422 is fixedly connected to one side of the decorative surface 421, wherein the mosaic block 422 is embedded in the assembly opening 41 and has an interference fit with the assembly opening 41, and when it is necessary to operate the clamping component, the blocking component is buckled out of the assembly opening (overcoming the elastic force of the second elastic member), and then the clamping component can be operated through the assembly opening, and the elliptical shape of the clamping component squeezes the push-up member during rotation, causing the push-up member to squeeze the convex strip upward, and the clamping component squeezes the lower hook strip downward, so that the lower hook strip can be tightly stuffed into the lower hanging strip to achieve a quick fixation effect.
[0048] The push-up member 43 includes a slider 431, which slides with the track 6 fixed on the back of the hanging plate 21 through the track groove 5 opened on the surface. Extension grooves 433 are opened on both sides of the slider 431. The extension block 432 is located inside the extension groove 433 and slides with it to limit the sliding direction of the slider 431. The extension block 432 and the extension groove 433 are fixedly connected by a first elastic member 434. The extension block 432 is pinched to squeeze the first elastic member 434 to achieve sliding inside the extension groove 433, and then the slider 431 is inserted from the assembly port 41 between the assembly plate 11 and the hanging plate 21. Then, under the action of the first elastic member 434, the extension block 432 is extended to ensure that the push-up member 43 is not easily removed from the assembly port 41.
[0049] The tightening assembly 44 in this embodiment includes a cam 441, a screw 442 and a nut 443, wherein the screw 442 passes through the cam 441, and the screw 442 is fixedly connected to the cam 441 through nuts 443 on both sides, a square bar 446 is slidably inserted at the end of the screw 442, and a rotating arm 447 is fixedly connected to the free end of the square bar 446, and a slot 423 that is engaged with the rotating arm 447 is provided on the surface of the inlay block 422; the cam is clamped on the surface of the screw by tightening two nuts, and the rotating arm is rotated so that the rotating arm drives the screw to rotate, and the cam is used to squeeze the upper push piece and the lower hook strip so that the two are mutually engaged The lower hook strip can be kept away from each other, so that the lower hook strip and the lower hanging strip can be clamped to achieve quick assembly; a square groove 444 is provided at the end of the screw rod 442, in which a square strip 446 slides inside the square groove 444, and a second elastic member 445 is fixedly connected between the square groove 444 and the square strip 446; the rotating arm is first covered with the clamping groove, and then the inlay block is rotated, and the inlay block drives the screw rod through the rotating arm. When the screw rod drives the cam to open the upper push piece and the lower hook strip, the inlay block is pressed to make the square strip squeeze the second elastic member back into the square groove, and finally the inlay block is clamped in the assembly port to ensure that the lower hook strip is always kept away from the convex strip, thereby ensuring the fixation between the assembly plate and the hanging plate.
[0050] The specific working process of this embodiment is as follows:
[0051] The assembly plate 11 is nailed to the wall, and then the upper hook strip 22 and the upper hanging strip 13, the lower hook strip 23 and the lower hanging strip 14 are matched, and the hanging plate 21 is pressed downward to make the upper hook strip 22 and the upper hanging strip 13, the lower hook strip 23 and the lower hanging strip 14 interference fit, and then the hanging plate 21 is fixed to the surface of the assembly plate 11. Since the split assembly is adopted, the skirting line is divided into an inner and outer part (i.e., the assembly hanger 1 and the hanging part 2). When the outer part is deformed by collision, only the outer part needs to be replaced without removing the inner part. Because the inner and outer parts are connected only by a snap-fit method, it has the advantage of convenient disassembly and assembly. Because the assembly plate 11 can be connected to the wall by nails, the overall stability is improved and it is not easy to fall off.
[0052] At the same time, since the upper and lower ends of the mounting plate 11 are bent to pad the hanging plate 21, a certain gap can be created between the hanging plate 21 and the wall, thereby preventing the hanging plate 21 from being closely attached to the mounting plate 11, and thereby ensuring that the mounting plate 11 is not affected when the hanging plate 21 is deformed by collision, thereby ensuring the service life of the mounting plate 11; the lower hanging bar 14 is bent against the ground, thereby preventing dust from entering between the lower hanging bar 14 and the wall; firstly, the bending of the arc 24 can round the contact portion between the hanging plate 21 and the ground for easy cleaning later; secondly, the rubber strip 3 is tightly squeezed against the ground by the hanging plate 21 and can be deformed to reduce the entry of dust.
[0053] When it is necessary to operate the tightening assembly 44, the sealing assembly 42 is buckled out of the assembly opening 41, and then the tightening assembly 44 can be operated through the assembly opening 41. Due to the elliptical shape of the tightening assembly 44, the sealing assembly 42 is squeezed during the rotation process, causing the sealing assembly 42 to squeeze the convex strip 12 upward, and the tightening assembly 44 squeezes the lower hook strip 23 downward, so that the lower hook strip 23 can be tightly stuffed into the lower hanging strip 14 to achieve a quick fixation effect. The cam 441 is clamped on the surface of the screw rod 442 by tightening the two nuts 443, and the rotating arm 447 is rotated so that the rotating arm 447 drives the screw rod 442 to cause the cam 441 to rotate, and the cam 441 is squeezed by the cam 441. The upper push piece 43 and the lower hook strip 23 are pressed to move them away from each other, so that the lower hook strip 23 and the lower hanging strip 14 can be clamped and quickly assembled. First, the slot 423 is put on the rotating arm 447, and then the inlay block 422 is rotated. The inlay block 422 drives the screw 442 through the rotating arm 447. When the screw 442 drives the cam 441 to open the upper push piece 43 and the lower hook strip 23, the inlay block 422 is pressed to make the square strip 446 squeeze the second elastic member 445 back into the square slot 444. Finally, the inlay block 422 is clamped in the assembly port 41 to ensure that the lower hook strip 23 is always kept away from the convex strip 12, thereby ensuring the fixation between the assembly plate 11 and the hanging plate 21.
[0054] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.
Claims
1. An indoor decorative skirting, comprising an assembly hanger (1) connected to a wall, characterized in that: The assembly hanger (1) comprises an assembly plate (11), wherein an upper hanging bar (13) and a lower hanging bar (14) are respectively installed at the upper and lower ends of the assembly plate (11), and the middle part of the assembly plate (11) protrudes in a direction away from the wall to form a convex bar (12). It also comprises a hanging member (2) assembled on the surface of the assembly hanger (1), and the hanging member (2) comprises a hanging plate (21) and an upper hook bar (22) and a lower hook bar (23) respectively fixedly connected to the upper and lower ends of the hanging plate (21), and the hanging plate (21) is assembled on the surface of the assembly plate (11) in a manner that the upper hook bar (22) is assembled on the surface of the upper hanging bar (13) and the lower hook bar (23) is assembled on the surface of the lower hanging bar (14).
2. The interior decoration skirting according to claim 1, characterized in that: The upper and lower ends of the assembly plate (11) are bent in the direction of the convex strip (12), and the upper hanging strip (13) is fixed to the upper bent end of the assembly plate (11), and the lower hanging strip (14) is fixed to the lower bent end of the assembly plate (11).
3. The interior decoration skirting according to claim 1, characterized in that: The lower part of the lower hanging bar (14) is bent towards the direction of the convex bar (12), and the bottom end of the lower hanging bar (14) is in contact with the ground.
4. The interior decoration skirting according to claim 1, characterized in that: The lower part of the hanging plate (21) is curved to form an arc (24), and a rubber strip (3) is sleeved on the outer side of the arc (24). When the hanging plate (21) is assembled on the assembly plate (11), the rubber strip (3) is in close contact with the ground.
5. The interior decoration skirting according to claim 1, characterized in that: An assembly mechanism (4) is provided between the assembly plate (11) and the hanging plate (21), and the assembly mechanism (4) comprises an upper push member (43) and a clamping assembly (44). The spacing between the lower hook strip (23) and the convex strip (12) is expanded by rotating the clamping assembly (44) in cooperation with the upper push member (43), so that the upper hook strip (22) and the upper hanging strip (13), and the lower hook strip (23) and the lower hanging strip (14) are clamped.
6. The interior decoration skirting according to claim 5, characterized in that: An assembly opening (41) is provided inside the hanging plate (21), and the tightening assembly (44) can be operated to rotate through the assembly opening (41).
7. The interior decoration skirting according to claim 6, characterized in that: It also comprises a blocking component (42), the blocking component (42) comprising a decorative surface (421), one side of the decorative surface (421) being fixedly connected with an inlay block (422), wherein the inlay block (422) is inlaid in the assembly opening (41) and is interference-fitted with the assembly opening (41).
8. The interior decoration skirting according to claim 6, characterized in that: The push-up member (43) comprises a slider (431), and the slider (431) is slidably matched with a track (6) fixed on the back of the hanging plate (21) through a track groove (5) provided on the surface. Extension grooves (433) are provided on both sides of the slider (431), and an extension block (432) is located inside the extension groove (433) and slidably matched therewith. The extension block (432) is fixedly connected to the extension groove (433) via a first elastic member (434).
9. The interior decoration skirting according to claim 7, characterized in that: The tightening assembly (44) comprises a cam (441), a screw (442) and a nut (443), wherein the screw (442) passes through the cam (441), and the screw (442) is fixedly connected to the cam (441) via nuts (443) on both sides; a square bar (446) is slidably inserted at the end of the screw (442), and a rotating arm (447) is fixedly connected to the free end of the square bar (446); and a slot (423) is provided on the surface of the inlay block (422) for engaging with the rotating arm (447).
10. The interior decoration skirting according to claim 9, characterized in that: The end of the screw rod (442) is provided with a square groove (444), wherein a square bar (446) slides inside the square groove (444), and a second elastic member (445) is fixedly connected between the square groove (444) and the square bar (446).