A mechanical structure for locking the side door from the inside of the cabinet.

Abstract

This utility model relates to a mechanical structure for locking a side door from inside a cabinet. It includes a base, a rocker arm, a pivot screw, fasteners, and a side door connecting plate. The base is fixed inside the cabinet side door via a bottom slot. The pivot screw is fixed to the rocker arm via a groove, forming a sliding lever structure. The side door connecting plate engages with the head of the rocker arm via a square hole. By screwing in the fastener and pushing the tail of the rocker arm, the longitudinal pressure is converted into a lateral pressing force on the side door connecting plate by the head of the rocker arm, achieving concealed locking. The innovative design of this utility model lies in the fact that all components are built into the cabinet, with no exposed locking structure, improving safety and aesthetics. The fasteners and rocker arm work together to achieve linear adjustment of the locking force, adapting to complex working conditions such as vibration and temperature differences. This device has a simple structure and low cost, solving the problems of exposed and easily damaged traditional cabinet door locks and inconvenient adjustment. It is particularly suitable for outdoor equipment with high protection requirements, such as DC charging piles.

Description

Technical Field

[0001] This utility model relates to a mechanical locking device, and more particularly to a mechanical structure for locking a side door from the inside of a cabinet. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for supporting DC charging piles is showing a significant growth trend. Compared with traditional high and low voltage distribution cabinets, DC charging piles have more stringent thermal management requirements due to their built-in high-power-density heat dissipation components—charging modules. To ensure the stable operation of the charging modules, an efficient air duct system needs to be constructed in the air intake and exhaust directions of the modules to achieve forced convection heat dissipation, thereby ensuring the heat dissipation efficiency and long-term reliability of the equipment. The most common design for DC charging piles is to have two small doors on the side with louvers for ventilation. This design requirement places more stringent technical demands on achieving efficient locking of the side doors, necessitating structural innovation to solve the balance between locking stability and ease of operation.

[0003] Current methods of side door locking mechanisms and their shortcomings:

[0004] (1) Use linkage locks or cylindrical locks to lock the side doors. However, using locks limits the selection and design freedom due to the limited number of styles available from manufacturers, and some parts of the lock will be exposed outside the door. Similarly, if internal studs are welded to the cabinet body, and holes are made in the side doors for external screw locking, some parts (screws, waterproof gaskets) will be exposed outside the cabinet. These methods all affect the overall aesthetics of the product because the components are exposed outside the cabinet.

[0005] (2) Inner Spring Hook and Loop Design. A connecting plate is made on the side door, and a spring hook and loop is installed on the inner side of the cabinet. The triangular lock head of the hook and loop moves back and forth. When the spring is released, the lock head inserts into the side door connecting plate to lock the side door. When the spring is compressed, the lock head retracts and the side door opens. This method seems reasonable but is not convenient for actual operation. Because the lock head moves back and forth and the side door connecting plate moves left and right, the locking of the side door is a one-time engagement. It is either tight or loose, and cannot be adjusted. This results in the side door being either too loose and not waterproof, or too tight and difficult to install.

[0006] Therefore, it is of great significance to invent a device for locking the side door of the cabinet that is neither exposed on the outside of the cabinet nor involves a spring structure. Utility Model Content

[0007] This utility model provides a mechanical structure, and more particularly a mechanical structure for locking the side door from the inside of the cabinet.

[0008] To achieve the above objectives, the technical solution of this utility model is: a mechanical structure for locking a side door from inside a cabinet, characterized in that it includes:

[0009] The cabinet connection assembly includes a base and a rocker arm that passes through the inside of the base. The surface of the base has a groove. The surface of the rocker arm is connected to a pivot screw. The pivot screw passes through the groove and slides within the groove. The bottom two sides of the base are bent outward to form a first fixing plate. Mounting waist holes are provided on the first fixing plate. A positioning opening is provided on the top surface of the base near the tail end, corresponding to the top surface of the rocker arm.

[0010] The fastener is screwed into the base through the positioning port and contacts the top surface of the rocker arm;

[0011] The side door connecting plate has a square hole on its surface. The side door connecting plate is detachably connected to the end of the rocker rod away from the fastener through the square hole. The bottom end is bent outward horizontally to form a second fixing plate. The second fixing plate has a mounting waist hole.

[0012] After the rocker arm head is inserted into the square hole, the fastener is tightened to press and lock the rocker arm to the side door connecting plate.

[0013] As a further improvement, the base has an opening at the bottom.

[0014] As a further improvement, the rocker arm has a rectangular structure.

[0015] As a further improvement, the tail of the rocker arm is turned upward to form an operating part.

[0016] As a further improvement, the surface of the operating part is provided with anti-slip texture.

[0017] As a further improvement, a rivet nut is fixedly riveted to the positioning port.

[0018] As a further improvement, the pivot screw is a flat-head pivot screw.

[0019] As a further improvement, the rocker arm is provided with a threaded through hole, the sliding grooves are symmetrically arranged on both sides of the base, and the two ends of the rotating shaft screw pass through the through hole and extend out from the two sliding groove positions respectively.

[0020] As a further improvement, the fastener is a wing screw.

[0021] The above-mentioned technical solution of this utility model has the following beneficial effects: This utility model controls the force on the tail of the rocker arm by controlling the screw-in depth of the fastener, which is converted into the lateral squeezing force of the head on the side door connecting plate, thereby realizing linear adjustment of the locking force and ensuring that the cabinet door remains firmly locked under vibration or temperature difference environments. This makes the locking force of the entire device adjustable and provides excellent stability. The fastener adopts a manual screw-on design, which can be quickly unlocked without tools. The flanged tail of the rocker arm forms the operating part, providing a force fulcrum. It can be pulled away from the side door connecting plate with one hand, greatly improving the efficiency of opening and closing the door. Locking and opening operations are simple. The base and the side door connecting plate All components are equipped with mounting holes to support fine-tuning of bolt positions, adapting to different cabinet thicknesses or installation deviations of welded bolts, thus reducing the requirements for machining precision. The rocker arm and the base form a sliding lever structure through the slide groove and the pivot screw, converting the longitudinal thrust of the fastener into a lateral locking force. The mechanical transmission path is clear, making it less prone to failure over long-term use. Only five basic parts are required (base, rocker arm, pivot screw, fastener, and side door connecting plate), resulting in lower costs and simplified manufacturing processes. The entire device is built into the cabinet, with no exposed locking components, avoiding the risk of external damage or misoperation, making it particularly suitable for outdoor equipment requiring high protection levels, such as DC charging piles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Reference numerals: 1. Base, 2. Rocker arm, 3. Shaft screw, 4. Fastener, 5. Side door connecting plate, 6. Slide groove, 7. Press-fit nut, 8. Operating part, 9. Waist hole, 10. Square hole, 11. First fixing plate, 12. Second fixing plate, 13. Fixing hole. Detailed Implementation

[0024] The following embodiments further illustrate the content of this utility model, but should not be construed as limiting the utility model. Any modifications or substitutions made to the methods, steps, or conditions of this utility model without departing from its spirit and essence are within the scope of this utility model.

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples.

[0026] Please see Figure 1As shown, this utility model discloses a mechanical structure for locking a side door from the inside of a cabinet. The structure is characterized by: a cabinet connecting assembly including a base 1 and a rocker arm 2 penetrating through the inside of the base 1; a groove 6 is formed on the surface of the base 1; a pivot screw 3 is connected to the surface of the rocker arm 2; the pivot screw 3 passes through the groove 6 and slides within the groove 6; the bottom sides of the base 1 are horizontally bent outwards to form a first fixing plate 11; mounting holes 9 are formed on the first fixing plate 11; and a positioning opening 13 is formed on the top surface of the base 1 near the tail end, corresponding to the top surface of the rocker arm 2.

[0027] Fastener 4 is screwed into base 1 through positioning port 13 and contacts the top surface of rocker arm 2; Side door connecting plate 5 has square hole 10 on its surface, and the side door connecting plate 5 is detachably connected to the end of rocker arm 2 away from fastener 4 through square hole 10, and the bottom end is bent outward horizontally to form second fixing plate 12, and mounting waist hole 9 is opened on the second fixing plate 12.

[0028] After the head of the rocker arm 2 is inserted into the square hole 10, the fastener 4 is tightened to press and lock the rocker arm 2 and the side door connecting plate 5.

[0029] Specifically, the base 1 has chamfered edges, and the mounting hole 9 is an elongated hole; the base 1 has a sliding groove 6 in the middle of its side to limit the sliding range of the pivot screw 3; a rivet nut 7 is fixed on the positioning port 13, which can be fixed by welding, riveting, etc., preferably by riveting, and is used to cooperate with the fastener 4; the rocker arm 2 has chamfered edges, penetrates the base 1 from below, and has a threaded through hole in its middle to cooperate with the pivot screw 3; the side door connecting plate 5 and the base 1 are fixed inside the cabinet by welding, riveting, or bolting, preferably by detachable bolting.

[0030] Specifically, the installation method of the entire device is as follows: Place the rocker arm 2 inside the base 1, align the threaded through hole of the rocker arm 2 with the slide groove 6, and screw the rotating shaft screw 3 through the slide groove 6 from the outside of the base 1 and into the threaded through hole of the rocker arm 2 until the other end of the rotating shaft screw 3 completely protrudes from the slide groove 6 on the other side; then, align the mounting waist hole 9 at the bottom of the base 1 with the bolts pre-welded to the inner side of the cabinet, and fix it with nuts, allowing for fine adjustment of the horizontal installation position of the base 1 according to the bolt position; then align the mounting waist hole 9 of the side door connecting plate 5 with the bolts welded to the inner side of the cabinet side door, and fix it with nuts, ensuring that the center line of the square hole 10 is aligned with the movement trajectory of the head of the rocker arm 2; then screw the fastener 4 into the press-fit nut 7.

[0031] Specifically, the operation method of the entire device is as follows: Push the rocker arm 2 to the end of the slide groove 6 to create space to close the cabinet side door, align the square hole 10 with the head of the rocker arm 2, gently push the side door to close, and simultaneously insert the head of the rocker arm 2 into the square hole 10 to complete the initial positioning. Rotate the fastener 4 clockwise, and its end presses against the tail of the rocker arm 2, forcing the head of the rocker arm 2 to apply lateral pressure to the inner wall of the square hole 10 until the cabinet side door is no longer shaking, thus achieving the internal locking function of the cabinet side door. When it is necessary to unlock the side door, rotate the fastener 4 counterclockwise until it is completely disengaged from the tail of the rocker arm 2, and then pull the operating part 8 outward to disengage the head of the rocker arm 2 from the square hole 10, thereby opening the cabinet side door.

[0032] The mechanical structure of this application for locking the side door from the inside of the cabinet controls the force on the tail of the rocker arm 2 by controlling the screwing depth of the fastener 4, which is then converted into a lateral squeezing force on the head of the side door connecting plate 5, thereby achieving linear adjustment of the locking force. This ensures that the cabinet door remains firmly locked even under vibration or temperature difference conditions, making the locking force of the entire device adjustable and providing excellent stability.

[0033] The fastener 4 features a manual screw-on design, allowing for quick unlocking without tools. The tail of the rocker arm 2 is flanged to form the operating part 8, providing a fulcrum for force application. It can be pulled off the side door connecting plate 5 with one hand, significantly improving the efficiency of opening and closing the door. Locking and opening operations are simple. Both the base 1 and the side door connecting plate 5 are equipped with mounting holes, supporting fine-tuning of bolt positions. This allows for adaptation to different cabinet thicknesses or installation deviations of welded bolts, reducing the requirements for processing precision. The rocker arm 2 and the base 1 form a sliding lever structure through the slide groove 6 and the pivot screw 3, converting the longitudinal thrust of the fastener 4 into a lateral locking force. The mechanical transmission path is clear, making it less prone to failure over long-term use. Only five basic parts are required (base, rocker arm, pivot screw, fastener, and side door connecting plate), resulting in lower costs and a simplified process. The entire device is built into the cabinet, with no exposed locking components, avoiding the risk of external damage or misoperation. It is especially suitable for outdoor equipment requiring high protection levels, such as DC charging piles.

[0034] Please refer to the following: Figure 1 As shown, the base 1 has an opening at the bottom, which is connected to the interior of the base 1. Specifically, the bottom opening increases the angular displacement of the rocker arm 2, further realizing continuous adjustment of the locking force.

[0035] Please refer to the following: Figure 1 As shown, the rocker arm 2 has a rectangular structure. Specifically, the rectangular structure increases the contact area between the front of the rocker arm 2 and the top of the square hole 10, further increasing the locking force.

[0036] Please refer to the following: Figure 1As shown, the tail of the rocker arm 2 is turned upward to form an operating part 8, specifically, it is used to manually pull the rocker arm 2 away from the side door connecting plate 5 to facilitate the implementation of push-pull operation.

[0037] Please refer to the following: Figure 1 As shown, the surface of the operating part 8 is provided with anti-slip texture. Specifically, the anti-slip texture can be achieved by knurling process, which increases the friction of the contact surface during operation and further facilitates push-pull operation.

[0038] Please refer to the following: Figure 1 As shown, a rivet nut 7 is fixed on the positioning port 13, which effectively increases the thread engagement depth, thereby improving the tensile strength of the thread. This structural improvement significantly enhances the load-bearing capacity of the fastening system.

[0039] Please refer to the following: Figure 1 As shown, the pivot screw 3 is a flat-head pivot screw. Specifically, its head can be adjusted to be flush with the outer surface of the base 1 during installation to avoid installation interference and improve space utilization.

[0040] Please refer to the following: Figure 1 As shown, the rocker arm 2 has a threaded through hole, and the sliding grooves 6 are symmetrically arranged on both sides of the base 1. The two ends of the pivot screw 3 pass through the threaded through hole and extend out from the two sliding grooves 6 respectively. Specifically, this increases the stability of the lever structure.

[0041] Please refer to the following: Figure 1 As shown, the fastener 4 is a wing screw. Specifically, the wing screw can be operated manually without tools, saving assembly time and costs.

[0042] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A mechanical structure for locking a side door from the inside of a cabinet, characterized in that: The cabinet connection assembly includes a base (1) and a rocker arm (2) that passes through the inside of the base (1). The surface of the base (1) has a groove (6). The surface of the rocker arm (2) is connected to a pivot screw (3). The pivot screw (3) passes through the groove (6) and slides within the groove (6). The bottom two sides of the base (1) are bent outward to form a first fixing plate (11). The first fixing plate (11) has mounting holes (9). The top surface of the base (1) near the tail end has a positioning opening (13) corresponding to the top surface of the rocker arm (2). The fastener (4) is screwed into the base (1) through the positioning port (13) and contacts the top surface of the rocker arm (2); The side door connecting plate (5) has a square hole (10) on its surface. The side door connecting plate (5) is detachably connected to the end of the rocker arm (2) away from the fastener (4) through the square hole (10). The bottom end is bent outward in a horizontal direction to form a second fixing plate (12). The second fixing plate (12) has a mounting waist hole (9). After the head of the rocker arm (2) is inserted into the square hole (10), the fastener (4) is tightened to press and lock the rocker arm (2) and the side door connecting plate (5).

2. The mechanical structure for locking the side door from inside the cabinet according to claim 1, characterized in that: The base (1) has an opening at the bottom.

3. The mechanical structure for locking the side door from inside the cabinet according to claim 1, characterized in that: The rocker arm (2) has a rectangular structure.

4. The mechanical structure for locking the side door from inside the cabinet according to claim 3, characterized in that: The tail of the rocker arm (2) is turned upward to form an operating part (8).

5. The mechanical structure for locking the side door from inside the cabinet according to claim 4, characterized in that: The surface of the operating part (8) is provided with anti-slip texture.

6. The mechanical structure for locking the side door from inside the cabinet according to claim 1, characterized in that: A rivet nut (7) is fixed on the positioning port (13).

7. The mechanical structure for locking the side door from inside the cabinet according to claim 1, characterized in that: The pivot screw (3) is a flat-head pivot screw.

8. The mechanical structure for locking the side door from inside the cabinet according to claim 7, characterized in that: The rocker arm (2) has a threaded through hole, and the slide groove (6) is symmetrically arranged on both sides of the base (1). The two ends of the rotating shaft screw (3) pass through the through hole and extend out from the two slide grooves (6) respectively.

9. The mechanical structure for locking the side door from inside the cabinet according to claim 1, characterized in that: The fastener (4) is a wing screw.

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