Wall hanging structure of ring screen sound box

Abstract

The utility model discloses a wall hanging structure of an annular screen sound box, which solves the technical problems that the existing wall hanging structure is inconvenient to install and operate and has poor self-locking force on the pitch angle of the sound box after being installed. The wall hanging structure comprises a fixing frame connected to a wall body, the fixing frame is connected with the ring screen sound box through a transverse swing adjusting frame, a pitching adjusting frame and a connecting frame in sequence, the top of the pitching adjusting frame is connected with the transverse swing adjusting frame in a hanging mode, and the bottom of the pitching adjusting frame and the transverse swing adjusting frame are each provided with a plurality of holes allowing the positioning columns to be connected in an inserted mode. Rapid installation can be achieved only by supporting the ring screen sound box and hanging the pitching adjusting frame on the yaw adjusting frame, a plurality of first positioning holes are formed in the bottom of the pitching adjusting frame, a second positioning hole is formed in the bottom of the yaw adjusting frame, the second positioning hole and the first positioning holes are connected through positioning columns, reliable self-locking of the pitching angle of the ring screen sound box can be achieved, and installation is convenient. When the pitch angle needs to be adjusted, the pitch angle of the ring screen sound box can be rapidly adjusted by only slightly pushing or pulling the bottom of the ring screen sound box and replacing the connected positioning hole 1.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a wall-mounted structure for a surround-screen speaker. Background Technology

[0002] A wall-mounted speaker is a specialized device used to suspend speakers on a wall. Traditionally, speakers are directly fixed to the wall with screws. This makes it difficult to adjust the viewing angle according to the listener's position, resulting in a narrow range of applications and uneven sound diffusion, significantly reducing the amplification effect and overall listening experience. Furthermore, cleaning and repair require tools to remove the screws, which can loosen and cause the speaker to detach.

[0003] Therefore, Chinese utility model patent CN 215835525 U, with an authorization announcement date of February 15, 2022, discloses a wall-mounted speaker structure and a wall-mounted speaker assembly. The structure includes a fixing plate fixed to a wall, an adjustment bracket located on the side of the fixing plate away from the wall, a stud with one end passing through the adjustment bracket on the side away from the fixing plate and the other end for connecting to the speaker, and a clamping member threaded onto the stud. The clamping member and the speaker are respectively located on both sides of the adjustment bracket. The side of the adjustment bracket away from the fixing bracket is arc-shaped, and a through hole is provided on the side of the adjustment bracket away from the fixing bracket for the stud to pass through. This wall-mounted speaker structure allows the speaker's playback angle to be adjusted according to the listener's position, improving the sound amplification effect and listening experience of the wall-mounted speaker.

[0004] When using the aforementioned speaker wall-mounting structure to suspend the speaker onto the fixed plate, the studs on the speaker need to be inserted into the through holes of the adjustment bracket and the clamping parts tightened. During this process, the installer needs to bear the weight of the entire speaker for a long time, which makes the installation difficult, inconvenient, and inefficient. Moreover, the adjustment bracket is curved, and the weight of the entire speaker is only connected to the fixed plate through the studs and clamping parts. The self-locking force after the speaker tilt angle is adjusted is poor, and the speaker is easy to sag freely due to its own weight. In addition, the flexibility of the speaker angle adjustment is poor. Utility Model Content

[0005] To address the shortcomings in the aforementioned background technology, this utility model proposes a wall-mounted structure for a surround-screen speaker, which solves the technical problems of inconvenient installation and poor self-locking force for the speaker's tilt angle after installation.

[0006] The technical solution of this application is as follows:

[0007] A wall-mounted structure for a surround sound system includes a fixed frame connected to the wall. The fixed frame is connected to the surround sound system in sequence via a horizontal adjustment frame, a pitch adjustment frame, and a connecting frame. The top of the vertical connecting frame is hung with the horizontal adjustment frame. The bottom of the vertical connecting frame is provided with several positioning holes. The positioning holes are inserted into the horizontal adjustment frame via positioning posts.

[0008] Preferably, the yaw adjustment frame includes a U-shaped plate, the two end plates of the U-shaped plate are rotatably connected to the fixed frame, and the U-shaped plate is vertically connected to two parallel side plates. The pitch angle of the two side plates relative to the pitch adjustment frame is adjusted by the positioning column.

[0009] Preferably, the pitch adjustment frame includes an inclined side plate connected to the connecting frame, and the inclined side plate is connected to two parallel trapezoidal plates, which are parallel to the side plate and are provided with the positioning hole one.

[0010] Preferably, a stud is connected to one side of the connecting frame, the connecting frame is connected to the inclined side plate through the stud, and the side of the connecting frame away from the stud is connected to the surround sound speaker through screws.

[0011] Preferably, the fixing frame includes a bent plate facing away from the wall, the bent plate is provided with a first pivot hole, and the two end plates of the U-shaped plate are provided with a second pivot hole that matches the first pivot hole. The first pivot hole and the second pivot hole are connected by a pivot shaft.

[0012] Preferably, the top of the pitch adjustment frame is rotatably connected to a handle, and the top of the two parallel side plates is provided with an upward-opening slot, in which the handle is hooked; a plurality of positioning holes are arranged in an arc-shaped array with the handle hooking point as the center, and the bottom of the two parallel side plates is provided with positioning holes, and the positioning post is inserted into the swing adjustment frame through the positioning holes.

[0013] Preferably, the diameter of the second positioning hole is larger than the diameter of the first positioning hole.

[0014] Preferably, one end of the positioning column is connected to the pitch adjustment frame via a connecting line.

[0015] Preferably, the two ends of the handle are inserted into two trapezoidal plates, and each insertion point is provided with a baffle to prevent the two ends of the handle from coming out of the two trapezoidal plates.

[0016] Preferably, the fixing frame includes several lugs with fixing holes, and several overflow grooves spaced apart from the fixing holes are provided between each lug. The fixing frame is connected to the wall with bolts through the fixing holes.

[0017] Compared with the prior art, the technical solution disclosed in this utility model has the following beneficial effects:

[0018] 1. By setting up detachable horizontal and vertical adjustment brackets, the horizontal adjustment bracket is connected to the wall via a fixed bracket, and the vertical adjustment bracket is connected to the surround sound system via a connecting bracket. When the surround sound system needs to be installed, the installer only needs to lift the surround sound system and hang the handle of the vertical adjustment bracket into the upward-facing slot of the horizontal adjustment bracket for quick installation. Furthermore, the horizontal adjustment bracket and the fixed bracket are connected at an adjustable angle in the horizontal direction, and the vertical adjustment bracket and the horizontal adjustment bracket are connected at an adjustable angle in the vertical direction. This allows the playback angle of the surround sound system to be adjusted according to the listener's position, improving the sound amplification effect and listening experience of the wall-mounted speaker.

[0019] 2. By setting a second positioning hole at the bottom of the pitch adjustment frame and a number of evenly spaced first positioning holes at the bottom of the yaw adjustment frame, and connecting the second positioning hole and the first positioning hole with a positioning post, a reliable self-locking mechanism for the pitch angle of the surround sound system is achieved. When it is necessary to adjust the pitch angle of the surround sound system, simply push or pull the bottom of the surround sound system to change the first positioning hole connected to the second positioning hole, and the pitch angle of the surround sound system can be quickly adjusted.

[0020] 3. To improve the accuracy of the installation position when connecting the mounting bracket to the wall, adhesive can be applied to the bracket first and then bonded to the wall, followed by fixing with screws. An overflow groove can be provided on the bracket to prevent tilting caused by uneven adhesive application, thus improving the accuracy of the connection position between the bracket and the wall and the reliability of the connection. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the surround sound system and the wall-mounted design;

[0023] Figure 2 This is a schematic diagram of the overall wall-mounted structure;

[0024] Figure 3 This is a horizontal half-section diagram of the wall-mounted structure;

[0025] Figure 4 This is a longitudinal half-section diagram of the wall-mounted structure;

[0026] Figure 5 This is the front view of the wall-mounted structure;

[0027] Figure 6 This is the left view of the wall-mounted structure;

[0028] Figure 7 This is a top view of the wall-mounted structure.

[0029] Explanation of icon numbers:

[0030] 1. Fixing bracket, 1-1 Lug, 1-2 Fixing hole, 1-3 Glue overflow groove, 1-4 First pivot hole, 2. Rotating bracket, 2-1 Swing adjustment bracket, 2-2 Pitch adjustment bracket, 2-3 Handle, 2-4 Slot, 2-5 Positioning hole one, 2-6 Positioning post, 2-7 Pivot shaft, 2-8 Connecting hole, 2-9 Baffle, 2-10 Second pivot hole, 2-11 Positioning hole two, 2-12 U-shaped plate, 2-13 Parallel side plate, 2-14 Slanted side plate, 2-15 Trapezoidal plate, 3. Connecting bracket, 3-1 Screw, 3-2 Stud, 4. Surround sound system. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1: A wall-mounted structure for a surround sound system includes a fixed frame 1 connected to the wall. The fixed frame 1 is connected to the surround sound system 4 in sequence via a horizontal adjustment frame 2-1, a pitch adjustment frame 2-2, and a connecting frame 3. The top of the vertical connecting frame 2-2 is hooked to the horizontal adjustment frame 2-1. The bottom of the vertical connecting frame 2-2 is provided with a plurality of positioning holes 2-5. The positioning holes 2-5 are inserted into the horizontal adjustment frame 2-1 through positioning posts 2-6.

[0033] Specifically, such as Figure 1 As shown, the rotating bracket 2 includes a horizontal adjustment bracket 2-1 and a vertical adjustment bracket 2-2. The horizontal and vertical adjustment brackets 2-1 and 2-2 are detachably connected. The vertical adjustment bracket 2-2 is connected to the surround sound system 4 via a connecting bracket 3. The horizontal adjustment bracket 2-1 is connected to the wall via a fixed bracket 1. The vertical adjustment bracket 2-2 is fixedly connected to the connecting bracket 3, and the horizontal adjustment bracket 2-1 is rotatably connected to the fixed bracket 1. The horizontal adjustment bracket 2-1 is horizontally adjustable relative to the fixed bracket 1. The top of the vertical adjustment bracket 2-2 is hung on the horizontal adjustment bracket 2-1, and the bottom of the vertical adjustment bracket 2-2 is adjustable relative to the horizontal adjustment bracket 2-1. This allows the playback angle of the surround sound system 4 to be adjusted according to the listener's position, improving the sound amplification effect and listening experience of the wall-mounted speaker.

[0034] When installing the surround sound system 4, the installer only needs to lift the surround sound system 4 and hang the tilt adjustment bracket 2-2 on the yaw adjustment bracket for quick installation. Both the bottom of the tilt adjustment bracket 2-2 and the bottom of the yaw adjustment bracket 2-1 have holes for the insertion of the positioning pins 2-6. The positioning pins 2-6 connect the tilt adjustment bracket 2-2 and the yaw adjustment bracket 2-1. Compared to threading the surround sound system 4 onto the curved adjustment bracket, this improves the stability of the surround sound system 4 after installation, ensuring it maintains the playback angle at the time of installation. Furthermore, the holes can be positioned vertically or horizontally, as long as they are aligned on the tilt adjustment bracket 2-2 and the yaw adjustment bracket 2-1. The shape of the holes can be circular, square, or hexagonal, as long as the shapes of the holes on the vertical connecting bracket 2-2 and the yaw adjustment bracket 2-1 are the same.

[0035] Example 2, based on Example 1, provides a wall-mounted structure for a surround-screen speaker. The horizontal adjustment frame 2-1 includes a U-shaped plate 2-12. The two end plates 2-10 of the U-shaped plate 2-12 are rotatably connected to the fixed frame 1. The U-shaped plate 2-12 is vertically connected to two parallel side plates 2-13. The pitch angle of the two side plates 2-13 relative to the pitch adjustment frame 2-2 is adjusted by the positioning column 2-6.

[0036] Specifically, such as Figures 2 to 4 As shown, the bending direction of the two side plates 2-13 is opposite to that of the two end plates 2-10. The two end plates 2-10 can be hinged or pivoted to the fixing frame 1, mainly to achieve horizontal rotation. The two side plates 2-13 are perpendicular to the wall and parallel to each other, so it is convenient to hang the tilt adjustment bracket 2-2 with the surround sound speaker 4 on the top of the two side plates 2-13. The bottom of the tilt adjustment bracket 2-2 is inserted into the bottom of the two side plates 2-13 through the positioning post 2-6. The playback angle of the surround sound speaker 4 can be adjusted by adjusting the insertion position of the positioning post 2-6.

[0037] Example 3, based on Example 2, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 2 to 4As shown, the pitch adjustment frame 2-2 includes an inclined side plate 2-14 connected to the connecting frame 3. The inclined side plate 2-14 is connected to two parallel trapezoidal plates 2-15. The trapezoidal plates 2-15 are parallel to the side plate 2-13, and the positioning holes 2-5 are provided on the trapezoidal plates 2-15. The inclined side plate 2-14 can pre-tilt the playback angle of the surround sound system 4 to a certain extent, reducing the workload of playback angle adjustment. The parallelism between the trapezoidal plates 2-15 and the side plate 2-13 facilitates the insertion of the positioning pins 2-6, reducing the difficulty of adjusting the playback angle. The trapezoidal plates 2-15 can be located on the outside or inside of the side plate 2-13. As long as the trapezoidal plates 2-15 and the side plate 2-13 overlap, corresponding holes can be provided on the trapezoidal plates 2-15 and the side plate 2-13.

[0038] Example 4, based on Example 3, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 2 to 3 As shown, a stud 3-2 is connected to one side of the connecting frame 3, and the connecting frame 3 is connected to the inclined side plate 2-14 through the stud 3-2. The side of the connecting frame 3 away from the stud 3-2 is connected to the surround sound speaker 4 through screw 3-1.

[0039] Specifically, the inclined side plate 2-14 is provided with a connection hole 2-8 corresponding to the stud 3-2. When connecting the connecting frame 3 and the pitch adjustment frame 2-2, first connect the connecting frame 3 to the surround sound speaker 4 through the screw 3-1, then pass the stud 3-2 on the connecting frame 3 through the connection hole 2-8 on the inclined side plate 2-14, and use a locking device to fix it at the tail of the stud 3-2.

[0040] Example 5, based on Example 3, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 5 to 7 As shown, the fixing frame 1 includes a bent plate 1-4 facing away from the wall. The bent plate 1-4 is provided with a first pivot hole. The two end plates 2-10 of the U-shaped plate 2-12 are each provided with a second pivot hole that matches the first pivot hole. The first pivot hole and the second pivot hole are connected by a pivot shaft 2-7.

[0041] Specifically, the fixed frame 1 is pivotally connected to the sway adjustment frame 2-1. Furthermore, the pivot shaft 2-7 can also be the output shaft of the motor. By adjusting the rotation and stopping of the output shaft, the horizontal angle of the surround sound system 4 can be changed. The motor can also be connected to a controller with a WIFI module. By operating the controller on a smart device, the rotation and stopping of the motor's output shaft can be directly controlled, thereby realizing the automatic adjustment of the horizontal playback angle of the surround sound system 4.

[0042] Example 6, based on Example 3, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 5 to 7As shown, the top of the pitch adjustment frame 2-2 is rotatably connected to a handle 2-3, and the top of the two parallel side plates 2-13 is provided with an upward-opening slot 2-4, in which the handle 2-3 is hooked; a number of positioning holes 1 2-5 are arranged in an arc-shaped array with the handle 2-3 as the center, and the bottom of the two parallel side plates 2-13 is provided with positioning holes 2-11, in which the positioning post 2-6 is inserted into the yaw adjustment frame 2-1 through the positioning holes 2-11.

[0043] Furthermore, to facilitate the attachment of the handle 2-3 to the slot 2-4, the opening of the slot 2-4 can be tilted outward. At the same time, to prevent the handle 2-3 from coming loose when adjusting the tilt angle of the surround sound speaker 4, latches can be installed on the two parallel side plates 2-13 of the horizontal adjustment frame 2-1, with the two ends of the latches located on both sides of the slot 2-4.

[0044] Example 7, based on Example 6, provides a wall-mounted structure for a surround-screen speaker, such as... Figure 3 As shown, the diameter of positioning hole 2-11 is larger than the diameter of positioning hole 2-5. Since trapezoidal plate 2-15 overlaps with side plate 2-13, when positioning post 2-6 is inserted into positioning hole 2-11, trapezoidal plate 2-15 will block the view. Therefore, the diameter of positioning hole 2-11 is increased to allow positioning post 2-6 to pass through positioning holes 2-5 and 2-11 on both trapezoidal plates 2-15 and both side plates 2-13.

[0045] Example 8, based on Example 6, provides a wall-mounted structure for a surround-screen speaker, wherein one end of the positioning post 2-6 is connected to the pitch adjustment frame 2-2 via a connecting line. To facilitate use and prevent loss of the positioning post 2-6, one end of the positioning post 2-6 is movably connected to the pitch adjustment frame 2-2.

[0046] Example 9, based on Example 6, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 5 to 7 As shown, the two ends of the handle 2-3 are inserted into two trapezoidal plates 2-15, and both insertion points are provided with baffles 2-9 to prevent the two ends of the handle 2-3 from coming out of the two trapezoidal plates 2-15.

[0047] Specifically, the two trapezoidal plates 2-15 are provided with through holes that match the diameters of the two ends of the handle 2-3. The middle section of the handle 2-3 can be arc-shaped or "door-shaped." The two ends of the handle 2-3 can be bent outwards or inwards, so that the two ends of the handle 2-3 can be inserted into the two trapezoidal plates 2-15 from the inside out or from the outside in. The cross-section of the handle 2-3 is a long and thin strip, which can be circular or flat elliptical. The baffle 2-9 is engaged at both ends of the handle 2-3 to prevent the handle 2-3 from becoming loose. Preferably, the handle 2-3 is made of stainless steel and has a circular cross-section.

[0048] Example 10, based on any one of Examples 1-9, provides a wall-mounted structure for a surround-screen speaker, such as... Figures 6 to 7 As shown, the fixing frame 1 includes several lugs 1-1 with fixing holes 1-2, and several glue overflow grooves 1-3 spaced apart from the fixing holes 1-2 between each lug 1-1. The fixing frame 1 is bolted to the wall through the fixing holes 1-2. The fixing holes 1-2 are used to fix the fixing frame 1 to the wall with bolts, and the glue overflow grooves 1-3 are used to overflow adhesive. When fixing the fixing frame 1 to the wall with adhesive, it prevents the fixing frame 1 from being poorly bonded or having a loose bond due to uneven adhesive on the surface of the fixing frame 1. Preferably, four lugs 1-1 are provided and are respectively located on both sides of the bending plate 1-4.

[0049] In Example 10, the fixed frame 1 and the sway adjustment frame 2-1 are connected as a whole. First, the pitch adjustment frame 2-2 is connected to the connecting frame 3 as a whole through studs 3-2 and locking parts. Then, the fixed frame 1 is fixed to the designated position on the wall with screws. Next, the surround sound speaker 4 is connected to the connecting frame 3 through screws 3-1. Then, the handle 2-3 of the pitch adjustment frame 2-2 is hooked into the slot 2-4 of the sway adjustment frame 2-1. Finally, by gently pushing or pulling the bottom of the surround sound speaker 4, the playback angle of the surround sound speaker 4 is adjusted to the correct position. Then, the positioning pin 2-6 is passed through the positioning hole 2-5 of the pitch adjustment frame 2-2 and the positioning hole 2-11 of the sway adjustment frame 2-1 to achieve reliable self-locking of the playback angle of the surround sound speaker 4, thereby keeping the playback angle of the surround sound speaker 4 stable at all times. When it is necessary to adjust the playback angle of the surround sound system 4, pull out the positioning pin 2-6, readjust the playback angle, and then pass the positioning pin 2-6 through the positioning hole 2-5 of the pitch adjustment bracket 2-2 and the positioning hole 2-11 of the yaw adjustment bracket 2-1 to adjust the playback angle of the surround sound system 4.

[0050] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0051] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wall-mounted structure for a surround-screen speaker, characterized in that: The device includes a fixed frame (1) connected to the wall. The fixed frame (1) is connected to the surround sound system (4) in sequence through a horizontal adjustment frame (2-1), a pitch adjustment frame (2-2) and a connecting frame (3). The top of the pitch adjustment frame (2-2) is hung with the horizontal adjustment frame (2-1). The bottom of the pitch adjustment frame (2-2) is provided with several positioning holes (2-5). The positioning holes (2-5) are inserted into the horizontal adjustment frame (2-1) through positioning posts (2-6). The sway adjustment frame (2-1) includes a U-shaped plate (2-12), the two end plates (2-10) of the U-shaped plate (2-12) are rotatably connected to the fixed frame (1), and the U-shaped plate (2-12) is vertically connected to two parallel side plates (2-13). The pitch angle of the two side plates (2-13) relative to the pitch adjustment frame (2-2) is adjusted by the positioning column (2-6). The top of the pitch adjustment frame (2-2) is rotatably connected to a handle (2-3), and the top of the two parallel side plates (2-13) is provided with an upward-opening slot (2-4), in which the handle (2-3) is hooked; a number of positioning holes (2-5) are arranged in an arc-shaped array with the handle (2-3) as the center, and the bottom of the two parallel side plates (2-13) is provided with positioning holes (2-11), and the positioning post (2-6) is inserted into the yaw adjustment frame (2-1) through the positioning holes (2-11).

2. The wall-mounted structure of the surround-screen speaker according to claim 1, characterized in that: The pitch adjustment frame (2-2) includes an inclined side plate (2-14) connected to the connecting frame (3). The inclined side plate (2-14) is connected to two parallel trapezoidal plates (2-15). The trapezoidal plates (2-15) are parallel to the side plate (2-13). The trapezoidal plates (2-15) are provided with the positioning hole one (2-5).

3. The wall-mounted structure of the surround-screen speaker according to claim 2, characterized in that: One side of the connecting frame (3) is connected to a stud (3-2), and the connecting frame (3) is connected to the inclined side plate (2-14) through the stud (3-2). The side of the connecting frame (3) away from the stud (3-2) is connected to the surround sound system (4) through a screw (3-1).

4. The wall-mounted structure of the surround-screen speaker according to claim 3, characterized in that: The fixing frame (1) includes a bent plate (1-4) facing away from the wall. The bent plate (1-4) is provided with a first pivot hole. The two end plates (2-10) of the U-shaped plate (2-12) are each provided with a second pivot hole that matches the first pivot hole. The first pivot hole and the second pivot hole are connected by a pivot shaft (2-7).

5. The wall-mounted structure of the surround-screen speaker according to any one of claims 1-4, characterized in that: The diameter of the second positioning hole (2-11) is larger than the diameter of the first positioning hole (2-5).

6. The wall-mounted structure of the surround-screen speaker according to claim 5, characterized in that: One end of the positioning column (2-6) is connected to the pitch adjustment frame (2-2) via a connecting line.

7. The wall-mounted structure of the surround-screen speaker according to claim 6, characterized in that: The two ends of the handle (2-3) are inserted into two trapezoidal plates (2-15), and both insertion points are provided with baffles (2-9) to prevent the two ends of the handle (2-3) from coming out of the two trapezoidal plates (2-15).

8. The wall-mounted structure of the surround-screen speaker according to any one of claims 1-4 and 6-7, characterized in that: The fixing frame (1) includes several lugs (1-1) with fixing holes (1-2), and several overflow grooves (1-3) spaced apart from the fixing holes (1-2) are provided between each lug (1-1). The fixing frame (1) is connected to the wall bolt through the fixing holes (1-2).

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