Silencer cabinet

Abstract

This utility model relates to the field of server rack technology and discloses a silent server rack, including a rack composed of a frame and multiple protective panels. The protective panels are a bottom plate, a top plate, a rear plate, a front plate, and two side plates, each fixed to a corresponding position on the side of the frame. The bottom plate is fixed to the bottom of the frame, the top plate to the top of the frame, the rear plate to the rear of the frame, the front plate to the front of the frame, and the two side plates to the sides of the frame, thus forming the entire rack. The multiple protective panels are spliced ​​with the frame and then secured with screws. By installing retaining side plates on the edges of the side plates, and attaching retractable spring buttons to these plates, the side plates are fitted against the inside of the frame during installation, and the spring buttons abut against corresponding positions on the inside of the frame, achieving stability during side plate installation and reducing vibration noise caused by equipment vibration.

Description

Technical Field

[0001] This utility model relates to the field of server rack technology, specifically a silent server rack. Background Technology

[0002] A server rack is a frame or container used to install and store various electronic devices, servers, network equipment, and computer hardware. Server racks are commonly used in data centers, server rooms, network rooms, and other locations requiring centralized management and storage of equipment. They help to effectively organize and manage large numbers of devices, maintain ventilation and heat dissipation, and provide physical security.

[0003] Traditional server racks are primarily used for equipment installation and physical protection, but they often generate noise during operation due to equipment vibration, airflow disturbances, and other factors. Long-term exposure to high-noise environments can easily cause health hazards to operators. The main sources of noise include the following:

[0004] (1) Poor stability of the protective plate installation: The protective plates of traditional cabinets are usually fixed to the frame by directly tightening screws. They lack auxiliary positioning structures and need to be manually lifted and adjusted during installation. Due to the gap or vibration, the protective plate and the frame are prone to loosening, which in turn causes mechanical noise.

[0005] (2) Weak sealing: The cabinet door and the main body of the cabinet are often connected by simple overlap or ordinary locks. The sealing strip is poorly designed and it is difficult to achieve a tight fit, which causes sound waves to escape from the gaps and weakens the overall quietness effect.

[0006] (3) Low integration of noise reduction modules: Existing sound absorption structures are mostly external or independent modules, which are separate from the main structure of the cabinet, occupy a lot of space and are inconvenient to disassemble and assemble, making it difficult to adapt to the noise reduction needs of different scenarios.

[0007] Therefore, the proposed silent cabinet is intended to solve the aforementioned technical problems. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a silent cabinet that effectively prevents noise leakage and provides noise reduction treatment, thereby improving the cabinet's quietness. It solves the problems of poor installation stability, weak sealing, and low integration of noise reduction modules in traditional cabinets.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a silent cabinet, comprising a cabinet, which is composed of a frame and multiple protective panels. The multiple protective panels are a bottom plate, a top plate, a rear plate, a front plate, and two side plates, which are respectively fixed to corresponding positions on the side of the frame. The bottom plate is fixed to the bottom of the frame, the top plate is fixed to the top of the frame, the rear plate is fixed to the rear side of the frame, the front plate is fixed to the front side of the frame, and the two side plates are respectively fixed to the two sides of the frame, thereby forming the cabinet as a whole. After the multiple protective panels are spliced ​​with the frame, they are locked and fixed by screws.

[0010] The front panel has a mounting groove in which a cabinet door is movably connected. The overall size of the cabinet door matches the size of the mounting groove, so that when the cabinet door is closed, it can provide a sealing protection for the inside of the cabinet. At the same time, the side edge of the cabinet door has a sealing strip that can fit tightly against the inside of the mounting groove to further improve the sealing performance.

[0011] The side panel is movably connected to a positioning component, which fits against the inside of the frame. When the side panel is installed inside the frame, the positioning component tightly adheres to the inside of the frame, increasing the stability between the side panel and the frame and preventing shaking and noise. At the same time, it provides initial stability during installation, avoiding the need for manual lifting during installation.

[0012] The side panels are equipped with retaining plates, which are movably connected within the frame. Retaining plates are vertically fixed in all four directions on one side of the side panel. These plates provide sufficient fixation to the frame. When the side panel is installed within the frame, the retaining plates are flush against the inner side of the frame. Screws penetrate the frame and connect to the retaining plates, ensuring complete fixation between the side panel and the frame. It should be further noted that multiple protective panels, like the side panels, are equipped with retaining plates. When these protective panels are inserted into corresponding positions on the side of the frame, screws penetrate the frame and connect to the corresponding retaining plates, achieving complete fixation of the entire cabinet after assembly.

[0013] A retaining groove is provided on one side of the side panel, and a sound-absorbing panel is movably connected in the retaining groove. The size of the side of the sound-absorbing panel matches the size of the retaining groove, which improves the stability after installation. The sound-absorbing panel absorbs and consumes the generated noise, thereby reducing noise generation.

[0014] When using this silent cabinet, multiple protective panels are installed at corresponding positions on the side of the frame, so that the positioning parts and fixing side plates fit into corresponding positions on the inner side of the frame. Screws are then passed through the frame and connected to the fixing side plates on the corresponding protective panels. Universal casters are installed at the four corners of the bottom of the base plate. The universal casters have a locking structure. After the cabinet is moved to the appropriate position, the universal casters are locked to fix the position of the cabinet. Then, the various devices are installed and operated in the cabinet. The noise generated during operation is absorbed and dissipated by the sound-absorbing panels.

[0015] As a further improvement to the above solution, a stacked piece is arranged on one side of the front panel, and a cabinet door is fixed at one end of the stacked piece. The cabinet door is movably connected in the mounting groove.

[0016] With the above technical solution, the top and bottom of one side of the front panel are respectively provided with overlapping plates. One end of the overlapping plate is fixed to the front panel, and the other end is fixed to the corresponding position on the cabinet door. This allows the cabinet door to be opened and closed with the mounting slot by rotating horizontally. When opened, the equipment components installed in the cabinet can be disassembled, inspected, and maintained. When closed, it can provide protection for the equipment components in the cabinet.

[0017] As a further improvement to the above solution, a latch is provided on the other side of the front panel, and a positioning lock is provided on one side of the cabinet door, with the output end of the positioning lock inserted into the latch.

[0018] With the above technical solution, the top and bottom of the other side of the front panel are provided with latches, and the top and bottom of the cabinet door are provided with positioning locks. When the cabinet door is closed with the mounting groove, the lock head of the positioning lock is inserted into the latch, so that the cabinet door is fixed on the mounting groove.

[0019] As a further improvement to the above solution, the side plate is composed of two thin plates, with partitions arranged horizontally and vertically opposite each other between the two thin plates, forming a fitting groove between the partitions.

[0020] The positioning component includes a positioning plate that is movably fitted into the mounting groove, and a rubber gasket is fixed on the positioning plate, with the rubber gasket fitting against the inner side of the frame.

[0021] Through the above technical solution, partitions are vertically arranged between the thin plates and at the edges of the four sides. The partitions are arranged in a "well" shape, making the side plates hollow and connected to the fixing groove for installing sound-absorbing panels. At the same time, when the side plates are installed in the frame, the rubber gaskets on the positioning plates are attached to the inside of the frame to increase frictional resistance, thereby improving the stability of the side plate installation.

[0022] It should be further noted that the thin plates and other protective plates are all made of stainless steel, which is corrosion resistant.

[0023] As a further improvement to the above solution, through holes are provided at both ends of the sleeve groove, and an air bladder is fixed between the through holes, with the air bladder attached to the bottom of the positioning plate.

[0024] Through the above technical solution, the through hole is used to inflate the airbag, causing the airbag to expand and lift the positioning plate, so that the positioning plate is tightly attached to the corresponding position on the inner side of the frame.

[0025] As a further improvement to the above solution, a valve is installed on the through hole, and the valve is connected to the inside of the inflation bladder.

[0026] The above technical solution uses an inflation device connected to a valve to inflate the airbag, and presses the valve core inside the valve to release the gas from the airbag.

[0027] As a further improvement to the above solution, a screw is inserted into the sound-absorbing plate, and one end of the screw is threaded to the side plate.

[0028] With the above technical solution, round holes are opened at the four directional corner positions of the sound-absorbing panel. One end of the screw passes through the round hole and is threaded to the inner side of the side plate located on the two thin plates, thereby fully fixing the sound-absorbing panel in the retaining groove.

[0029] As a further improvement to the above solution, the sound-absorbing plate has multiple sound-absorbing holes on one side and multiple exhaust holes on the other side, with the sound-absorbing holes and exhaust holes connected.

[0030] Through the above technical solution, the sound-absorbing panel absorbs the noise generated inside the cabinet through the sound-absorbing holes and digests the noise through the internal structure, thereby reducing the generation of noise.

[0031] As a further improvement to the above solution, multiple interconnected sound-collecting slots are provided horizontally between the sound-absorbing holes and the exhaust holes, and limiting plates are arranged opposite each other in the sound-collecting slots, with a thin film fixed between the limiting plates.

[0032] With the above technical solution, at least three sound-collecting slots are provided between each sound-absorbing hole and the exhaust hole. The sound-collecting slots are hollow spheres. Noise enters the sound-collecting slots through the sound-absorbing holes. Through repeated rebound and with the expansion of the membrane to cover the noise, the noise is gradually weakened. At the same time, the noise is gradually silenced by multiple sound-collecting slots, thereby achieving noise reduction and silencing.

[0033] As a further improvement to the above solution, the thin film is provided with multiple sound emission holes.

[0034] Through the above technical solution, the film expands when affected by noise, causing the sound outlet to open, thereby transmitting the noise to the next sound receiving slot through the sound outlet, realizing the gradual weakening of noise until it is completely eliminated.

[0035] As a further improvement to the above solution, a sleeve is fixed to one side of the retaining side plate, and a spring button is movably connected inside the sleeve. The spring button passes through the retaining side plate and fits against the inner side of the frame.

[0036] With the above technical solution, when the side panel is installed in the frame, it extends outward from the sleeve through the spring button and fits against the inner side of the frame, thus achieving stable installation of the side panel in the frame.

[0037] Compared with the prior art, this utility model provides a silent cabinet with the following advantages:

[0038] 1. This silent cabinet features a retaining side plate installed on the edge of the side panel, with a retractable spring button installed on the retaining side plate. During side panel installation, the retaining side plate fits against the inside of the frame, and the spring button abuts against the corresponding position inside the frame, thus achieving stability of the side panel installation and reducing vibration noise caused by equipment vibration.

[0039] 2. This silent cabinet has a positioning plate installed in the mounting groove on the side of the side panel. The positioning plate is pushed by the expansion of the internal air bladder to fully fit the corresponding side of the frame, thereby achieving a full sealing effect on the gaps. At the same time, it improves the stability between the guard plate and the frame, and avoids noise generated by vibration and the leakage of internal noise.

[0040] 3. This silent cabinet uses sound-absorbing panels installed on the protective plate. The noise is drawn into the sound-absorbing slot through the sound-absorbing holes. With the cooperation of multiple layers of sound absorption and the expansion and contraction of the film, the noise is gradually weakened, thereby effectively silencing the sound noise generated by the equipment in the cabinet and effectively improving its practicality. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall external structure of the device of this utility model;

[0042] Figure 2 This is a schematic diagram of the overall structure of the side plate of this utility model;

[0043] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A in the middle;

[0044] Figure 4 This is a schematic diagram of the top view of the side plate structure of this utility model;

[0045] Figure 5 This is a schematic diagram of the internal side view of the sound-absorbing panel of this utility model;

[0046] Figure 6 This utility model Figure 5 Schematic diagram of the structure at point A in the middle.

[0047] The attached diagram lists the components represented by each number as follows:

[0048] 1. Cabinet; 11. Frame; 12. Base plate; 13. Top plate; 14. Rear plate; 15. Front plate; 151. Mounting slot; 152. Folding plate; 153. Lock; 16. Cabinet door; 161. Positioning lock; 17. Side plate; 171. Thin plate; 172. Partition; 173. Mounting slot; 174. Through hole; 175. Valve; 176. Inflatable bladder; 177. Retention slot; 18. Positioning component; 181. Positioning plate; 182. Rubber gasket; 19. Retention side plate; 191. Sleeve; 192. Spring button; 20. Sound-absorbing plate; 201. Screw; 202. Sound-absorbing hole; 203. Drain hole; 204. Sound-receiving slot; 205. Limiting plate; 206. Membrane; 207. Vent hole. Detailed Implementation

[0049] 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 embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0050] Please see Figures 1-3 As shown, the silent cabinet proposed in this embodiment includes a cabinet 1, which consists of a frame 11 and multiple protective panels. The multiple protective panels are a bottom plate 12, a top plate 13, a rear plate 14, a front plate 15, and two side plates 17, which are fixed to corresponding positions on the side of the frame 11. The bottom plate 12 is fixed to the bottom of the frame 11, the top plate 13 is fixed to the top of the frame 11, the rear plate 14 is fixed to the rear side of the frame 11, the front plate 15 is fixed to the front side of the frame 11, and the two side plates 17 are fixed to the two sides of the frame 11, thereby forming the cabinet 1 as a whole. After the multiple protective panels are spliced ​​with the frame 11, they are fixed by screws.

[0051] The front panel 15 has a mounting groove 151, and a cabinet door 16 is movably connected in the mounting groove 151. The overall size of the cabinet door 16 matches the size of the mounting groove 151, so that when the cabinet door 16 is closed with the mounting groove 151, it can provide a sealing protection for the inside of the cabinet 1. At the same time, a sealing strip is provided on the side edge of the cabinet door 16, which can fit tightly against the inside of the mounting groove 151 to further improve the sealing performance.

[0052] The side panel 17 is movably connected to a positioning member 18. The positioning member 18 fits against the inner side of the frame 11. When the side panel 17 is installed in the frame 11, it is tightly attached to the inner side of the frame 11 by the positioning member 18, which increases the stability between the side panel 17 and the frame 11 and avoids shaking and noise. At the same time, it has initial stability during installation and avoids manual lifting installation.

[0053] Side panel 17 is provided with retaining side plates 19, which are movably connected inside frame 11. Retaining side plates 19 are vertically fixed in four directions on one side of side panel 17. Retaining side plates 19 are used to provide sufficient fixation between side panel 17 and frame 11. When side panel 17 is installed inside frame 11, retaining side plates 19 are tightly attached to the inside of frame 11. At the same time, screws pass through frame 11 and are threadedly connected to retaining side plates 19, thus achieving full fixation between side panel 17 and frame 11. It should be further noted that multiple guard plates are provided with retaining side plates 19, just like side panel 17. When guard plates are inserted into corresponding positions on the side of frame 11, screws pass through frame 11 and are threadedly connected to the retaining side plates 19 of the corresponding guard plates, thus achieving complete fixation of the entire cabinet 1 after assembly.

[0054] A retaining groove 177 is provided on one side of the side plate 17. A sound-absorbing plate 20 is movably connected in the retaining groove 177. The size of the side of the sound-absorbing plate 20 matches the size of the retaining groove 177, which improves the stability after installation. The sound-absorbing plate 20 absorbs and consumes the generated noise, thereby reducing the generation of noise.

[0055] The working principle of the silent cabinet proposed in this embodiment is as follows: In use, multiple protective plates are installed at corresponding positions on the side of the frame 11, so that the positioning piece 18 and the fixed side plate 19 are attached to the corresponding positions on the inner side of the frame 11. Then, screws are used to pass through the frame 11 and connect to the fixed side plate 19 on the corresponding protective plate. Universal wheels are installed at the four corners of the bottom of the base plate 12. The universal wheels have a locking structure. After the cabinet 1 is pushed to the appropriate position, the universal wheels are locked to fix the position of the cabinet 1. Then, each device is installed and operated in the cabinet 1. The noise generated during operation is absorbed and consumed by the sound-absorbing plate 20.

[0056] Furthermore, a stacked piece 152 is provided on one side of the front panel 15, and a cabinet door 16 is fixed at one end of the stacked piece 152. The cabinet door 16 is movably connected in the mounting groove 151.

[0057] More specifically, a stacked piece 152 is provided on the top and bottom of one side of the front panel 15. One end of the stacked piece 152 is fixed to the front panel 15, and the other end is fixed to the corresponding position on the cabinet door 16, so that the cabinet door 16 can be rotated horizontally to achieve the closing and opening of the mounting slot 151. When opened, the equipment components installed in the cabinet 1 can be disassembled, inspected, and maintained. When closed, it can provide protective measures for the equipment components of the cabinet 1.

[0058] Furthermore, a latch 153 is provided on the other side of the front panel 15, and a positioning lock 161 is provided on one side of the cabinet door 16. The output end of the positioning lock 161 is inserted into the latch 153.

[0059] More specifically, the top and bottom of the other side of the front panel 15 are provided with latches 153, and the top and bottom of the cabinet door 16 are provided with positioning locks 161. When the cabinet door 16 is closed with the mounting groove 151, the lock head of the positioning lock 161 is inserted into the latches 153, so that the cabinet door 16 is fixed on the mounting groove 151.

[0060] Example 2

[0061] Please see Figure 2-4 As shown in the figure, the silent cabinet proposed in this embodiment, based on the first embodiment, further includes a side panel 17 composed of two thin plates 171, with a partition 172 arranged horizontally and vertically opposite between the two thin plates 171, and a fitting groove 173 formed between the partitions 172.

[0062] The positioning component 18 includes a positioning plate 181 that is movably sleeved in the mounting groove 173, and a rubber gasket 182 is fixed on the positioning plate 181. The rubber gasket 182 is attached to the inner side of the frame 11.

[0063] More specifically, partitions 172 are vertically arranged between the thin plates 171 and at the edges of the four sides. The partitions 172 are arranged in a "well" shape, making the side plates 17 hollow and communicating with the fixing grooves 177 for installing the sound-absorbing panels 20. At the same time, when the side plates 17 are installed in the frame 11, the rubber gaskets 182 on the positioning plate 181 are attached to the inner side of the frame 11 to increase the frictional resistance, thereby improving the stability of the installation of the side plates 17.

[0064] It should be further noted that the 171 sheet and other protective plates are all made of stainless steel, which is corrosion resistant.

[0065] Furthermore, through holes 174 are provided at both ends of the mounting groove 173, and an airbag 176 is fixed between the through holes 174. The airbag 176 is attached to the bottom of the positioning plate 181.

[0066] More specifically, the through hole 174 is used to inflate the airbag 176, causing the airbag 176 to expand and lift the positioning plate 181, so that the positioning plate 181 is tightly attached to the corresponding position on the inner side of the frame 11.

[0067] Furthermore, a valve stem 175 is installed on the through hole 174, and the valve stem 175 is connected to the inside of the airbag 176.

[0068] More specifically, the inflation device is connected to the valve 175 to inflate the airbag 176, and the airbag 176 is vented by pressing the valve core inside the valve 175. Example 3

[0069] Please see Figure 3 and Figures 5-6 As shown, the silent cabinet proposed in this embodiment, based on the first and second embodiments, further includes a screw 201 inserted into the sound-absorbing plate 20, with one end of the screw 201 threadedly connected to the side plate 17.

[0070] More specifically, the sound-absorbing panel 20 has round holes at the four directional corner positions. One end of the screw 201 passes through the round hole and is screwed to the inside of the side plate 17 on the two thin plates 171, thereby fully fixing the sound-absorbing panel 20 in the retaining groove 177.

[0071] Furthermore, the sound-absorbing panel 20 has multiple sound-absorbing holes 202 on one side and multiple exhaust holes 203 on the other side, with the sound-absorbing holes 202 and exhaust holes 203 connected.

[0072] More specifically, the sound-absorbing panel 20 absorbs the noise generated inside the cabinet 1 through the sound-absorbing holes 202 and digests the noise through the internal structure, thereby reducing the generation of noise.

[0073] Furthermore, multiple interconnected sound-collecting grooves 204 are provided horizontally between the sound-absorbing hole 202 and the discharge hole 203. Restriction plates 205 are arranged opposite each other in the sound-collecting grooves 204, and a thin film 206 is fixed between the restriction plates 205.

[0074] More specifically, at least three sound-collecting slots 204 are provided between each sound-absorbing hole 202 and the discharge hole 203. The sound-collecting slots 204 are hollow spheres. Noise enters the sound-collecting slots 204 through the sound-absorbing holes 202. Through repeated rebound and with the expansion of the membrane 206 to cover the noise, the noise is gradually weakened. At the same time, the noise is successively silenced by multiple sound-collecting slots 204, thereby achieving noise reduction and silencing.

[0075] Furthermore, the thin film 206 has multiple sound outlet holes 207.

[0076] More specifically, when the diaphragm 206 is affected by noise, it expands, causing the sound outlet 207 to unfold, thereby transmitting the noise to the next sound receiving slot 204 through the sound outlet 207, achieving the gradual weakening of the noise until it is completely eliminated.

[0077] Furthermore, a sleeve 191 is fixed to one side of the retaining side plate 19, and a spring button 192 is movably sleeved inside the sleeve 191. The spring button 192 passes through the retaining side plate 19 and fits against the inner side of the frame 11.

[0078] More specifically, when the side plate 17 is installed inside the frame 11, it extends outward from the sleeve 191 via the spring button 192 and fits against the inner side of the frame 11, thereby achieving stable installation of the side plate 17 inside the frame 11.

[0079] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soundproof cabinet comprising a cabinet (1), characterized in that, The cabinet (1) consists of a frame (11) and multiple protective panels, which are a bottom plate (12), a top plate (13), a rear plate (14), a front plate (15), and two side plates (17), and are respectively fixed to the corresponding positions on the side of the frame (11); The front panel (15) is provided with a mounting groove (151), and a cabinet door (16) is movably connected in the mounting groove (151). The side of the side plate (17) is movably connected to a positioning member (18), which is attached to the inside of the frame (11). A retaining side plate (19) is provided on the side plate (17), and the retaining side plate (19) is movably connected inside the frame (11); A retaining groove (177) is provided on one side of the side plate (17), and a sound-absorbing plate (20) is movably connected in the retaining groove (177).

2. A silencer cabinet according to claim 1, characterized in that: A stacked piece (152) is provided on one side of the front panel (15), and a cabinet door (16) is fixed at one end of the stacked piece (152). The cabinet door (16) is movably connected in the mounting groove (151).

3. A silencer cabinet according to claim 2, characterized in that: A latch (153) is provided on the other side of the front panel (15), and a positioning lock (161) is provided on one side of the cabinet door (16). The output end of the positioning lock (161) is inserted into the latch (153).

4. A soundproof cabinet according to claim 1, characterized in that: The side plate (17) is composed of two thin plates (171), with partitions (172) arranged horizontally and vertically opposite each other between the two thin plates (171), and a fitting groove (173) is formed between the partitions (172). The positioning component (18) includes a positioning plate (181) that is movably fitted into the mounting groove (173), and a rubber pad (182) is fixed on the positioning plate (181), the rubber pad (182) being attached to the inner side of the frame (11).

5. A silencer cabinet according to claim 4, characterised in that: Both ends of the fitting groove (173) are provided with through holes (174), and an airbag (176) is fixed between the through holes (174). The airbag (176) is attached to the bottom of the positioning plate (181).

6. A silencer cabinet according to claim 5, characterised in that: A valve (175) is installed on the through hole (174), and the valve (175) is connected to the inside of the air bag (176).

7. A soundproof cabinet according to claim 1, characterized in that: A screw (201) is inserted into the sound-absorbing plate (20), and one end of the screw (201) is threaded onto the side plate (17).

8. A silencer cabinet according to claim 7, characterized in that: The sound-absorbing plate (20) has multiple sound-absorbing holes (202) on one side and multiple discharge holes (203) on the other side, and the sound-absorbing holes (202) and discharge holes (203) are connected.

9. A silencer cabinet according to claim 8, characterized in that: Multiple interconnected sound-collecting slots (204) are provided horizontally between the sound-absorbing hole (202) and the discharge hole (203). Restriction plates (205) are arranged opposite each other in the sound-collecting slots (204), and a thin film (206) is fixed between the restriction plates (205). The film (206) has multiple sound holes (207).

10. A soundproof cabinet according to claim 1, characterized in that: A sleeve (191) is fixed on one side of the retaining side plate (19), and a spring button (192) is movably sleeved inside the sleeve (191). The spring button (192) passes through the retaining side plate (19) and fits against the inside of the frame (11).

Images