Electrical equipment protection device

Abstract

The utility model provides an electrical equipment protection device, and belongs to the technical field of electrical equipment. The first connecting assembly is arranged on the side wall of the equipment main body and comprises a first connecting part and a driving part, and the driving part is used for driving the first connecting part to be far away from or close to the equipment main body; and the second connecting assembly is arranged on the mounting base body, the second connecting assembly comprises a second connecting part, and the second connecting part is detachably connected to the first connecting part. In the dismounting and mounting process, the driving part can be used for controlling the first connecting part to be far away from the equipment main body, so that the distance between the equipment main body and the mounting base body is increased, and a worker can conveniently operate detachable connection of the first connecting part and the second connecting part; and the driving part is used for controlling the first connecting part to be close to the equipment main body, so that the problem of inconvenience in disassembly and assembly in a traditional mounting mode can be effectively solved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and specifically relates to an electrical equipment protection device. Background Technology

[0002] Electrical equipment refers to the collective term for equipment such as generators, transformers, power lines, and circuit breakers in a power system. From a functional perspective, electrical equipment is mainly used in various stages of power generation, transmission, transformation, distribution, and consumption. For example, a generator is a device that converts other forms of energy into electrical energy; a transformer is used to change voltage levels to achieve efficient power transmission; and a circuit breaker can quickly cut off the current when a circuit fault occurs, protecting the electrical system and equipment. In terms of components, electrical equipment typically includes conductive parts, insulating parts, and control parts. The conductive parts are responsible for transmitting current, the insulating parts ensure that the current flows in a specified path without leakage or other dangers, and the control parts monitor and control the operating status of the electrical equipment.

[0003] Electrical equipment is typically installed and fixed in the form of electrical cabinets, with installation locations including ground-mounted and high-altitude installations. Currently, electrical equipment is directly fixed to the mounting base using screws. However, in high-altitude installations, limited operating space makes disassembly inconvenient, and there is a risk of screws rusting and falling off. Utility Model Content

[0004] This application aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, this application provides an electrical equipment protection device that solves the problem of inconvenient disassembly during high-altitude installations.

[0005] An electrical equipment protection device according to an embodiment of this application includes:

[0006] Equipment body;

[0007] A first connecting component is disposed on the side wall of the device body. The first connecting component includes a first connecting part and a driving part. The driving part is connected to the first connecting part and is used to drive the first connecting part away from or towards the device body.

[0008] A second connecting component is disposed on a mounting base and includes a second connecting portion that is detachably connected to the first connecting portion.

[0009] The electrical equipment protection device according to the embodiments of this application has at least the following beneficial effects:

[0010] The electrical equipment protection device of this application has a first connecting component on the main body of the equipment and a second connecting component on the mounting base. The first connecting part on the first connecting component and the second connecting part on the second connecting component are detachably connected to achieve the connection and fixation between the main body of the equipment and the mounting base. During the disassembly and assembly process, the first connecting part can be controlled to move away from the main body of the equipment by the drive unit, thereby increasing the distance between the main body of the equipment and the mounting base. This makes it easier for the operator to operate the detachable connection between the first connecting part and the second connecting part. After the first connecting part and the second connecting part are connected and fixed or disassembled, the first connecting part can be controlled to move closer to the main body by the drive unit. This can effectively solve the problem of inconvenience in disassembly and assembly of traditional installation methods.

[0011] Furthermore, during maintenance and disassembly, since the disassembly point is located between the first and second connecting parts rather than on the mounting base, the use of screws between the first and second connecting parts helps to alleviate screw corrosion. Moreover, the connection structure between the first and second connecting parts can be designed to eliminate the need for screws.

[0012] According to some embodiments of this application, the first connecting portion is provided with a first cavity, the second connecting portion is provided with a fitting block that matches the first cavity, the fitting block is inserted into the first cavity, and a first snap-fit ​​portion is provided between the fitting block and the side wall of the first cavity, the first snap-fit ​​portion being provided in a direction perpendicular to the insertion of the fitting block into the first cavity.

[0013] According to some embodiments of this application, the fitting block and the first cavity are horizontally arranged, the first snap-fit ​​portion is vertically downwardly inserted between the side wall of the first cavity and the fitting block, and the first snap-fit ​​portion is at least threadedly connected to the fitting block.

[0014] According to some embodiments of this application, the first connecting component further includes a mounting portion connected to the device body, and the first connecting portion is slidably disposed on the mounting portion.

[0015] According to some embodiments of this application, the mounting part is provided with a second cavity, the second cavity is opened at one end away from the main body of the device, and the two opposite sidewalls of the second cavity are provided with first sliding grooves, and the opposite ends of the first connecting part are slidably connected to the first sliding grooves.

[0016] According to some embodiments of this application, the driving part is snapped into the first connecting part.

[0017] According to some embodiments of this application, the first connecting part is provided with a snap-fit ​​groove, and the two opposite sidewalls of the snap-fit ​​groove are provided with multi-stage teeth along the length direction of the first sliding groove. The driving part is provided with a gear, and the two sides of the gear mesh with the teeth of the snap-fit ​​groove.

[0018] According to some embodiments of this application, the drive unit is configured as a telescopic structure, and the gear is detachably mounted on the drive unit.

[0019] According to some embodiments of this application, the electrical equipment protection device further includes a support base, the support base being provided with a second slide groove, one end of the second slide groove being open in the length direction, the bottom of the device body being inserted into the second slide groove from the open end of the second slide groove and engaging with the second slide groove, the support base being provided with a limiting component at the end of the device body near the open end of the second slide groove, the limiting component being used to restrict the movement of the device body toward the open end of the second slide groove.

[0020] According to some embodiments of this application, the limiting component includes:

[0021] A cover plate, which is rotatably disposed on one side of the upper end slot of the second slide groove;

[0022] A positioning block is provided on the other side of the upper end slot of the second slide groove and aligned with the cover plate. The positioning block is provided with a snap-fit ​​structure that can snap into the cover plate.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of an overall structure of this application;

[0026] Figure 2 This is a schematic diagram of a connection between the first connecting component and the second connecting component in this application;

[0027] Figure 3 This is a schematic diagram of the installation of the main body of the equipment and the supporting base in this application;

[0028] Figure 4 This is a schematic diagram of one structure of the limiting component in this application. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0033] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Reference Figures 1 to 4 This application provides an electrical equipment protection device, including a device body 100, a first connecting component 200, and a second connecting component 300. The first connecting component 200 is disposed on the side wall of the device body 100, and the second connecting component 300 is disposed on a mounting base. The device body 100 is fixedly mounted on the mounting base by the connection between the first connecting component 200 and the second connecting component 300.

[0035] Specifically, the first connection assembly 200 includes a first connection portion 201 and a drive portion 204, the drive portion 204 being connected to the first connection portion 201 and used to drive the first connection portion 201 away from or towards the device body 100. The second connection assembly 300 includes a second connection portion 301, the second connection portion 301 being detachably connected to the first connection portion 201.

[0036] The electrical equipment protection device of this application has a first connecting component 200 on the main body 100 and a second connecting component 300 on the mounting base. The main body 100 and the mounting base are detachably connected through the first connecting part 201 on the first connecting component 200 and the second connecting part 301 on the second connecting component 300, thereby realizing the connection and fixation between the main body 100 and the mounting base.

[0037] During the disassembly and assembly process, the drive unit 204 can be used to control the first connecting part 201 to move away from the main body 100 of the equipment, thereby increasing the distance between the main body 100 of the equipment and the mounting base. This makes it easier for the staff to operate the detachable connection between the first connecting part 201 and the second connecting part 301. After the first connecting part 201 and the second connecting part 301 are connected and fixed or disassembled, the drive unit 204 can be used to control the first connecting part 201 to move closer to the main body 100. This can effectively solve the problem of inconvenience in disassembly and assembly in the traditional installation method.

[0038] Furthermore, during maintenance and disassembly, since the disassembly point is located between the first connecting part 201 and the second connecting part 301, rather than on the mounting base, the use of screws between the first connecting part 201 and the second connecting part 301 helps to alleviate screw corrosion. Moreover, the connection structure between the first connecting part 201 and the second connecting part 301 can be designed to eliminate the need for screws.

[0039] Reference Figure 2 In some embodiments of this application, the first connecting portion 201 is provided with a first recess 2011, and the second connecting portion 301 is provided with a fitting block 302 that matches the first recess 2011. The fitting block 302 is inserted into the first recess 2011, and a first snap-fit ​​portion 202 is provided between the fitting block 302 and the side wall of the first recess 2011. The first snap-fit ​​portion 202 is provided in a direction perpendicular to the insertion of the fitting block 302 into the first recess 2011.

[0040] It is understood that in this embodiment, the second connecting part 301 is inserted into the first cavity 2011 by the fitting block 302 and then fixed by the first snap-fit ​​part 202. Since the first snap-fit ​​part 202 is set perpendicular to the insertion direction of the fitting block 302, it can effectively prevent the fitting block 302 from coming out of the first cavity 2011.

[0041] In this embodiment, by utilizing the insertion relationship between the fitting block 302 and the first cavity 2011, combined with the snap-fit ​​fixation of the first snap-fit ​​part 202, the connection strength and stability between the first connecting part 201 and the second connecting part 301 can be effectively ensured. Based on the close fit between the fitting block 302 and the sidewall of the first cavity 2011, the connection is stable and will not loosen, ensuring the installation reliability of the device body 100. Furthermore, the structural design is simple; only the first snap-fit ​​part 202 needs to be disassembled and assembled to complete the disassembly and assembly of the first connecting part 201 and the second connecting part 301, improving disassembly and assembly efficiency. Simultaneously, the snap-fit ​​relationship of the first snap-fit ​​part 202 further improves disassembly and assembly efficiency.

[0042] Reference Figure 2 In some embodiments of this application, the fitting block 302 and the first cavity 2011 are horizontally arranged, and the first snap-fit ​​portion 202 is vertically downwardly inserted between the side wall of the first cavity 2011 and the fitting block 302. With the structural arrangement of this embodiment, the first connecting portion 201 cooperates with the fitting block 302 through the first cavity 2011, and the upper and lower ends of the fitting block 302 abut against the upper and lower side walls of the first cavity 2011. This allows the second connecting portion 301 to effectively bear the weight of the device body 100, which helps ensure the reliability of the support and fixation.

[0043] Based on this, the first snap-fit ​​part 202 is set vertically downward, which can use gravity to improve the installation stability of the first snap-fit ​​part 202 and prevent the first snap-fit ​​part 202 from being uncontrolled to come off.

[0044] Based on the structure of the above embodiment, the first snap-fit ​​portion 202 is further threadedly connected to the fitting block 302. By threading the first snap-fit ​​portion 202 to the fitting block 302, the installation stability of the first snap-fit ​​portion 202 can be further improved, preventing uncontrolled disengagement from occurring.

[0045] Specifically, a first mounting hole can be provided on the upper and lower sidewalls of the first cavity 2011, and a second mounting hole can be provided on the fitting block 302. An internal thread can be provided in the second mounting hole, and the first snap-fit ​​part 202 can be configured as a bolt structure, passing through the first mounting hole and threadedly connected to the second mounting hole. Alternatively, the first mounting hole can also be configured as a threaded hole, so that the first snap-fit ​​part 202 simultaneously threadedly connects the first connecting part 201 and the fitting block 302. The specific configuration can be flexibly designed and adjusted as needed, and will not be listed in detail here.

[0046] Reference Figure 2In some embodiments of this application, the first connecting component 200 further includes a mounting portion 203, which is connected to the device body 100, and the first connecting portion 201 is slidably disposed on the mounting portion 203. Since the first connecting portion 201 can move away from the device body 100 under the control of the driving portion 204, this embodiment uses the mounting portion 203 to install the first connecting portion 201, which is beneficial to improving the installation stability and installation strength of the first connecting portion 201.

[0047] Furthermore, in practical applications, the device body 100 can be detachably connected via the mounting part 203, allowing the first connecting component 200 to be assembled and used as a detachable module with the device body 100. When high-altitude installation is required, the mounting part 203 is installed on the side wall of the device body 100. When high-altitude installation is not required, but ground-fixed installation is required, the mounting part 203 is removed from the device body 100.

[0048] Reference Figure 2 In some embodiments of this application, the mounting portion 203 is provided with a second cavity, and the second cavity is open at one end opposite to the device body 100. The two opposite sidewalls of the second cavity are provided with first sliding grooves. The opposite ends of the first connecting portion 201 are slidably connected to the first sliding grooves.

[0049] In this embodiment, the two ends of the first connecting portion 201 are slidably disposed within the first sliding groove, which ensures the stability of the installation and the smoothness of sliding when the drive portion 204 controls the movement towards or away from the device body 100. Preferably, the two ends of the first connecting portion 201 that are opposite each other in the horizontal direction cooperate with the first sliding groove, which can effectively transfer the weight of the device body 100 to the first connecting portion 201 through the cooperation of the two first sliding grooves with the first connecting portion 201, and then to the second connecting portion 301. This helps to ensure the reliability of the installation of the device body 100 and can prevent the first connecting portion 201 from becoming unstable under load when it moves and is adjusted relative to the device body 100.

[0050] In some embodiments of this application, the drive unit 204 snaps onto the first connecting part 201. This embodiment connects the drive unit 204 to the first connecting part 201 via a snap-fit ​​mechanism, allowing for disassembly and reassembly of the drive unit 204 and the first connecting part 201. This facilitates replacement of the first connecting part 201 as needed, enabling the replacement of the first connecting part 201 with different sizes and shapes according to installation requirements. Furthermore, multiple snap-fit ​​positions can be further provided along the length of the first slide groove to adjust the connection position between the drive unit 204 and the first connecting part 201, thereby adjusting the adjustment stroke of the first connecting part 201.

[0051] Reference Figure 2In some embodiments of this application, the first connecting part 201 is provided with a snap-fit ​​groove 2012, and the two opposite sidewalls of the snap-fit ​​groove 2012 are provided with multi-stage teeth 2013 along the length direction of the first sliding groove. At the same time, the driving part 204 is provided with a gear 2041, and the two sides of the gear 2041 mesh with the teeth 2013 of the snap-fit ​​groove 2012.

[0052] By employing the structural configuration of this embodiment, the initial position of the first connecting part 201 can be adjusted by meshing the gear 2041 with different teeth 2013 of the locking groove 2012, thereby changing the travel of the first connecting part 201. Furthermore, the meshing of teeth 2013 on one side of each side of the gear 2041 ensures the connection stability between the drive part 204 and the first connecting part 201, ensuring that the drive part 204 can smoothly and reliably drive the first connecting part 201 to move. Simultaneously, since the weight of the device body 100 is transmitted through the first connecting part 201 and the second connecting part 301, the locking method of the gear 2041 on both sides avoids the gear 2041 from experiencing bending moment due to the weight of the device body 100, thereby reducing the radial load on the drive part 204 and helping to extend its service life.

[0053] When adjusting the gear 2041 to mesh with the teeth 2013 at different positions, the gear 2041 can be moved out to the second cavity by the drive unit 204. Then, the first connecting part 201 can be moved from top to bottom or from bottom to top to make the teeth 2013 and gear 2041 mesh correctly. Then, the gear 2041 can be moved in the opposite direction by the drive unit 204, and the first connecting part 201 can be driven to cooperate with the second cavity.

[0054] The gear 2041 can also be disassembled to mesh with the teeth 2013 at different positions. Those skilled in the art can flexibly install and adjust it according to the actual structure, without making specific limitations here.

[0055] In some embodiments of this application, the drive unit 204 is configured as a telescopic structure, and the gear 2041 is detachably mounted on the drive unit 204. Specifically, the drive unit 204 can be configured as an electric push rod, a hydraulic telescopic structure, or other telescopic structures, which will not be listed in detail here.

[0056] In actual installation, it is preferable to place the drive part 204 in the second cavity of the mounting part 203, so that the first connecting part 201 and the second connecting part 301 are symmetrically distributed with respect to the drive part 204.

[0057] Reference Figure 3In some embodiments of this application, the electrical equipment protection device further includes a support base 400. The support base 400 is detachably disposed at the bottom of the equipment body 100 to enable the equipment body 100 to be fixed to the ground. By providing the support base 400, this embodiment enables the equipment body 100 to simultaneously meet the different requirements of high-altitude installation and ground installation, thereby improving the scope of application and flexibility.

[0058] Specifically, the electrical equipment protection device is provided with two support bases 400 for support from both sides of the bottom of the equipment body 100. Each support base 400 has a second slide groove 403, with one end open along its length and the upper end also open along its length. A snap-fit ​​seat is provided at the bottom of the equipment body 100, which is inserted into and snapped into the second slide groove 403 from its open end.

[0059] A limiting block 401 is provided on one side of the support base 400 at the opening end in the length direction away from the second slide groove 403, and the limiting block 401 protrudes from the upper end surface of the support base 400. At the same time, a limiting component 402 is provided on the support base 400 at the opening end of the equipment body 100 in the length direction near the second slide groove 403, and the limiting component 402 is used to restrict the movement of the equipment body 100 toward the opening end of the second slide groove 403.

[0060] When using the support base 400, align the snap-fit ​​seat at the bottom of the device body 100 with the end opening of the second slide groove 403 along its length, and insert it into the second slide groove 403 until the device body 100 abuts against the limiting block 401. Then install the limiting component 402, abutting against the opposite side of the device body 100 from the limiting block 401, thus fixing the device body 100 onto the support base 400. Finally, fix the support base 400 to the ground. At this point, the first connecting component 200 can be removed from the device body 100.

[0061] Reference Figure 4 In some embodiments of this application, the limiting component 402 includes a cover plate 4021 and a positioning block 4022. The cover plate 4021 is rotatably disposed on one side of the upper opening of the second slide groove 403, while the positioning block 4022 is disposed on the other side of the upper opening of the second slide groove 403. The positioning block 4022 is aligned with the cover plate 4021, and the positioning block 4022 is provided with a snap-fit ​​structure that can engage with the cover plate 4021.

[0062] When installing the main body 100, the control cover 4021 is in the open state, causing it to exit the path of the main body 100 moving along the second slide 403. After the main body 100 abuts against the limiting block 401, the control cover 4021 rotates to the docking positioning block 4022. At this time, the cover 4021 abuts against the main body 100 and is located on the path of the main body 100's reverse movement, preventing the main body 100 from moving in the opposite direction. By using a snap-fit ​​structure to engage the cover 4021, uncontrolled flipping of the cover 4021 can be prevented.

[0063] Specifically, the positioning block 4022 is provided with a connecting groove 4023 with an opening at the top, and the cover plate 4021 is provided with a boss 4025 that matches the connecting groove 4023. At the same time, the positioning block 4022 is provided with a horizontally positioned pin 4024. When the cover plate 4021 is flipped to mate with the positioning block 4022, the boss 4025 is inserted into the connecting groove 4023, and the cover plate 4021 is locked in place by the pin 4024 passing through the groove wall of the connecting groove 4023 and inserting into the boss 4025.

[0064] In addition, the main body 100 of the device in this application can also be configured with conventional structures such as heat dissipation slots and rain shields.

[0065] In summary, the electrical equipment protection device of this application has the following advantages:

[0066] 1. The electrical equipment protection device in this application is suitable for both high-altitude and ground-based installations, and has a wide range of applications;

[0067] 2. The electrical equipment protection device in this application is applicable to the modification of existing structures;

[0068] 3. The electrical equipment protection device in this application solves the problem of inconvenience in disassembly under traditional high-altitude installation conditions. Furthermore, under high-altitude installation conditions, the drive unit 204 can automatically adjust the distance between the main body of the equipment 100 and the installation base, and can also adjust the initial distance between the two, thus meeting various installation needs and having a wide range of applications.

[0069] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An electrical equipment protection device, characterized in that, include: Equipment body; A first connecting component is disposed on the side wall of the device body. The first connecting component includes a first connecting part and a driving part. The driving part is connected to the first connecting part and is used to drive the first connecting part away from or towards the device body. A second connecting component is disposed on a mounting base, and the second connecting component includes a second connecting part that is detachably connected to the first connecting part. The first connecting part is provided with a first cavity, and the second connecting part is provided with a fitting block that matches the first cavity. The fitting block is inserted into the first cavity, and a first snap-fit ​​part is provided between the fitting block and the side wall of the first cavity. The first snap-fit ​​part is provided in a direction perpendicular to the insertion of the fitting block into the first cavity.

2. The electrical equipment protection device according to claim 1, characterized in that, The fitting block and the first cavity are horizontally arranged, the first snap-fit ​​portion is vertically downward inserted between the side wall of the first cavity and the fitting block, and the first snap-fit ​​portion is at least threadedly connected to the fitting block.

3. The electrical equipment protection device according to claim 1, characterized in that, The first connecting component further includes a mounting part, which is connected to the device body, and the first connecting part is slidably disposed on the mounting part.

4. The electrical equipment protection device according to claim 3, characterized in that, The mounting part is provided with a second recess, the second recess is opened at one end away from the main body of the device, and the two opposite side walls of the second recess are provided with first sliding grooves, and the opposite ends of the first connecting part are slidably connected to the first sliding grooves.

5. The electrical equipment protection device according to claim 4, characterized in that, The drive unit engages with the first connecting unit.

6. The electrical equipment protection device according to claim 5, characterized in that, The first connecting part is provided with a snap-fit ​​groove, and the two opposite sidewalls of the snap-fit ​​groove are provided with multi-stage teeth along the length direction of the first sliding groove. The driving part is provided with a gear, and the two sides of the gear mesh with the teeth of the snap-fit ​​groove.

7. The electrical equipment protection device according to claim 6, characterized in that, The drive unit is configured as a telescopic structure, and the gear is detachably mounted on the drive unit.

8. The electrical equipment protection device according to claim 1, characterized in that, The electrical equipment protection device further includes a support base, the support base being provided with a second slide groove, one end of the second slide groove being open in the length direction, the bottom of the equipment body being inserted into the second slide groove from the open end of the second slide groove and engaging with the second slide groove, the support base being provided with a limiting component at the end of the equipment body near the open end of the second slide groove, the limiting component being used to restrict the movement of the equipment body toward the open end of the second slide groove.

9. The electrical equipment protection device according to claim 8, characterized in that, The limiting component includes: A cover plate, which is rotatably disposed on one side of the upper end slot of the second slide groove; A positioning block is provided on the other side of the upper end slot of the second slide groove and aligned with the cover plate. The positioning block is provided with a snap-fit ​​structure that can snap into the cover plate.

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