A cabinet concealed conductive structure with high freedom of adjustment

Abstract

The utility model discloses a kind of cabinet hidden conductive structure of layer plate contact power taking and height free adjustment, the structure includes cabinet and its internal storage cavity, storage cavity is separated into multiple storage grid layers by layer plate, vertically extending long slot position is equipped in the left side plate or right side plate inside of cabinet, embedded conductive rail is equipped with positive and negative electrode conductive strip in its front side face.Corresponding layer plate and top plate mounting position, first recess with long slot position intercommunication is equipped on left side plate or right side plate, embedded first power taking seat, the rear end of this power taking seat is contacted and conducted by positive and negative electrode thimble and conductive strip, the side surface of the notch of first recess position towards first power taking seat is equipped with first power connection end, second recess is arranged in the side edge of layer plate and top plate, and second power taking seat is inlayed, and its second power connection end is connected with first power connection end, realizes power supply, and conductive strip connects power supply controller and is connected into external power supply, and second power taking seat is then for the power supply of the embedded layer plate or top plate consumer, realizes hidden wiring and layer plate height flexible adjustment power taking.

Description

Technical Field

[0001] This disclosure relates to the field of customized cabinet technology, and in particular to a cabinet concealed conductive structure with shelf contact power supply and freely adjustable height. Background Technology

[0002] Custom cabinets are made to perfectly fit the dimensions of a room, tailored to the actual size of the space. Existing custom cabinets typically offer a choice of different materials, panel colors, and textures to match the overall decor. To highlight the high-end feel of custom cabinets with glass doors, or to provide lighting for easier item identification when the doors are open, LED light strips are often embedded in the cabinet body or shelves. Wiring holes are located near the back panel where these light strips are installed, allowing the power cords for the LED light strips to be routed to the back of the back panel and connected to a power adapter for AC power. For shelves with LED light strips, multiple power adapters with various interfaces are needed to connect the power cords for each LED light strip from the back panel to the adapters. Current designs have two drawbacks: firstly, the LED light strips and power connections on the shelves are fixed, making repositioning difficult; secondly, drilling holes in the back panel for wiring disrupts its integrity and exposes the wires, affecting aesthetics. Therefore, the conductive structure of existing custom cabinets needs optimization and improvement. Utility Model Content

[0003] In view of this, this disclosure proposes a cabinet concealed conductive structure with shelf contact power supply and freely adjustable height. A concealed conductive rail extending vertically along the cabinet is set at the connection between the rear side of the left or right side panel and the back panel. A power supply base is set on the side of the shelf corresponding to the conductive rail to achieve contact power supply. The shelf can be set at any height, and its contact power supply does not require additional wiring. The concealed design of the cabinet conductive structure is simple in appearance and meets the needs of consumers.

[0004] The specific technical solution of this utility model is a cabinet-type concealed conductive structure with shelf contact power supply and freely adjustable height. The cabinet includes a cabinet body, which is a storage cavity structure formed by a left side panel, a right side panel, a back panel, a top panel, and a bottom panel, with a hollow interior at the front opening. Shelves divide the storage cavity into multiple upper and lower storage compartments. The cabinet body has a concealed conductive structure, which consists of a long groove extending vertically on the inner wall of the left or right side panel near its rear end. A conductive rail is embedded in the long groove, and positive and negative conductive strips are arranged parallel to each other along the length of the conductive rail on its front side. The left and right sides of the back panel are respectively connected to the inner sides of the left and right side panels, and the thickness of the back panel is sufficient to cover the opening of the long groove. The top plate is connected to the inner sides of the left and right side plates respectively. The left or right side plate, corresponding to the long groove, has a first recessed position at the height of the top plate and shelf plate, located along the front side of the long groove. The rear end of the first recessed position communicates with the long groove. A first power-taking base is embedded in the first recessed position. The rear end of the first power-taking base has a first positive electrode pin and a first negative electrode pin that respectively contact and conduct electricity with the positive and negative conductive strips. A first electrical terminal is provided on the side of the first power-taking base facing the opening of the first recessed position. A second recessed position is provided on the left or right side of the top plate and shelf plate near their rear ends. A second power-taking base is embedded in the second recessed position. A second electrical terminal is provided on the side of the second power-taking base facing the opening of the second recessed position. The second electrical terminal is connected to the first electrical terminal, and the thickness of the top plate and shelf plate is sufficient to cover the opening of the first recessed position. The positive and negative conductive strips are electrically connected to a power controller, which is connected to an external power source. The second power-taking base is electrically connected to an electrical appliance embedded in the top plate and / or shelf plate.

[0005] Furthermore, the conductive rail is injection molded from insulating engineering plastic. The front side of the conductive rail is provided with a first guide groove and a second guide groove that are parallel and spaced apart along the length direction. The first guide groove and the second guide groove are respectively embedded with a positive conductive strip and a negative conductive strip.

[0006] Furthermore, a wire hole is provided on the upper side of the first groove position at the height position corresponding to the mounting top plate on the left or right side plate. The power controller is located on the top surface of the top plate. The power controller is electrically connected to the first power take-up base in the first groove position through the wire hole via a power cord. The power is conducted to the positive and negative conductive strips through the first power take-up base in the first groove position.

[0007] Furthermore, the first power-receiving base includes a first front shell, a first PCB board, and a first bottom shell. The first power-receiving end is a positive conductive spring and a negative conductive spring provided on the first PCB board. The first front shell is provided with a first through hole and a second through hole arranged side by side at intervals to expose the positive conductive spring and the negative conductive spring, respectively. The rear top surface of the first PCB board is provided with a first positive plug hole and a first negative plug hole for connecting the first positive pin and the first negative pin. The rear ends of the first front shell and the first bottom shell are provided with holes for the first positive pin and the first negative pin to pass through. The bottom surface of the first PCB board is provided with a first positive and a negative solder pad for connecting power lines to be soldered. The first bottom shell is provided with a wire-passing hole for the power lines to pass through. The first front shell and the first bottom shell are connected and fixed by screws.

[0008] Preferably, the first faceplate has a countersunk hole at its center, the inner wall of the countersunk hole extends downward, and the first PCB board has a first through hole that passes through the inner wall of the countersunk hole. The first bottom shell has a second through hole that engages with the countersunk hole, and the first power supply base is fixed in the first groove by a screw inserted through the countersunk hole.

[0009] Furthermore, the second power-receiving base includes a second front shell, a second PCB board, and a second bottom shell. The second power-receiving end is provided with a second positive electrode pin and a second negative electrode pin on the second PCB board. The top surface of the second PCB board is provided with a second positive electrode insertion hole and a second negative electrode insertion hole for connecting the second positive electrode pin and the second negative electrode pin. The second front shell and the second bottom shell are snapped together.

[0010] Preferably, the second PCB board is provided with second positive and negative pads, the second positive and negative pads are connected to a power wire with a DC power plug, and the second shell is provided with a third through hole for passing through the power wire, the DC power plug is used to connect electrical appliances.

[0011] Furthermore, the second face shell has snap-fit ​​openings on its left and right sides, and the second bottom shell has first elastic snap-fit ​​parts on its left and right sides that engage with the snap-fit ​​openings. The first elastic snap-fit ​​part includes a connecting arm perpendicular to the second bottom shell, and the front end of the connecting arm has a barb protruding outward. The second face shell has second elastic snap-fit ​​parts on its front and rear sides. The second elastic snap-fit ​​parts are cantilever elastic buckles formed by cutouts on the second face shell, and the front end of the cantilever elastic buckle has a barb protruding outward.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This design features a long slot for mounting conductive rails on the inner side wall near the rear end of the left or right side panel of the cabinet. Sufficient space is provided for this long slot, and a first recessed slot for mounting a first power outlet is provided on the front side of the corresponding long slot. The purpose of the first power outlet is to connect the first recessed slot to the long slot. The forward-facing contact surfaces of the positive and negative conductive strips on the conductive rails exposed at the first recessed slot are switched to face the left or right side of the top or shelf panel. Simultaneously, when connecting the left or right side panel via the back panel, the side of the back panel covers the opening of the long slot, and the side panels of the top or shelf panel cover the first recessed slot, thus concealing the conductive structure within the cabinet and resulting in a clean and aesthetically pleasing interior.

[0013] This solution uses a long groove set vertically along the inner wall of the rear end of the left or right side panel to ensure that the installed conductive rail covers the entire height of the cabinet's interior space. Therefore, multiple first groove positions at different heights can be set. Corresponding to the first groove positions, the inner walls of the left and right side panels have shelf support structures to support the shelves. Shelves can be freely inserted into the shelf supports at different heights. At the same time, the second power outlet on the side of the shelf is electrically connected to the first power outlet located in the first groove position, thereby enabling free adjustment of the shelf height and quick power connection without wiring. Attached Figure Description

[0014] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0015] Figure 1 This is an exploded view of the structure of the right side plate, the first groove, the first power supply base, the conductive rail, and the power controller disclosed in this utility model.

[0016] Figure 2 This is a schematic diagram of the right side plate assembly of the conductive rail, the first power supply base, and the power controller disclosed in this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the top plate and the shelf plate of this utility model, which has a second groove and a second power supply base.

[0018] Figure 4 This is a schematic diagram of the structure for assembling the second power supply base in the second groove of the top plate and the layer plate disclosed in this utility model.

[0019] Figure 5 This is an exploded view of the first power-taking base structure disclosed in this utility model.

[0020] Figure 6 This is a perspective view of the overall structure of the first power-collecting base disclosed in this utility model.

[0021] Figure 7 This is a schematic diagram of a conductive rail structure disclosed in this utility model.

[0022] Figure 8 This is an exploded view of the second power-taking base structure disclosed in this utility model.

[0023] Figure 9 This is a perspective view of the overall structure of the second power-taking base disclosed in this utility model.

[0024] Figure 10 This is a three-dimensional view of the overall structure of a cabinet disclosed in this utility model.

[0025] Figure 11 This is the front view of the cabinet disclosed in this utility model.

[0026] Figure 12 for Figure 11 Cross-sectional structural diagram of XX.

[0027] Figure 13 for Figure 12 Enlarged schematic diagram of the structure at point A in the middle.

[0028] Figure 14 This is a schematic diagram of another conductive rail structure disclosed in this utility model.

[0029] Figure 15 For setting Figure 14 Cross-sectional structural diagram of the cabinet with the central conductive rail.

[0030] Figure 16 for Figure 15 Enlarged schematic diagram of the structure at point B. Detailed Implementation

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

[0032] Please refer to Figures 1 to 13This technical solution discloses a cabinet-type concealed conductive structure with adjustable shelf contact power supply and height. The cabinet includes a cabinet body, which is a storage cavity structure formed by a left side panel 1, a right side panel 2, a back panel 3, a top panel 4, and a bottom panel 5, with a hollow interior at the front opening. The storage cavity is divided into multiple upper and lower storage compartments by shelves 6. The cabinet body has a concealed conductive structure; specifically, the concealed conductive structure consists of a long, vertically extending groove 2 on the inner side wall of the right side panel 2 near its rear end. 01. A conductive rail 7 is embedded in the long slot 201. The front side of the conductive rail 7 is provided with positive conductive strips 71 and negative conductive strips 72 arranged parallel to each other along the length direction. The left and right sides of the back plate 3 are respectively connected to the inner sides of the left side plate 1 and the right side plate 2, and the thickness of the back plate 3 is sufficient to cover the slot opening of the long slot 201. The left and right sides of the top plate 4 are respectively connected to the inner sides of the left side plate 1 and the right side plate 2. The right side plate 2 is installed at the height positions of the top plate 4 and the layer plate 6 along the front side of the long slot 201. A first recessed position 202 is provided, the rear end of which communicates with a long slot 201. A first power-taking base 8 is embedded in the first recessed position 202. The rear end of the first power-taking base 8 is provided with a first positive electrode pin 84 and a first negative electrode pin 85, which respectively contact and conduct electricity with the positive electrode conductive strip 71 and the negative electrode conductive strip 72. A first power-connecting terminal is provided on the side of the first power-taking base 8 facing the slot opening of the first recessed position 202. A second recessed position 601 is provided on the right side of the top plate 4 and the layer plate 6 near their rear ends. A second power-receiving base 9 is embedded in the second recess 601. The side of the second power-receiving base 9 facing the opening of the second recess 601 has a second power-connecting terminal, which is connected to the first power-connecting terminal. The thickness of the top plate 4 and the layer plate 6 is sufficient to cover the opening of the first recess 202. The positive conductive strip 71 and the negative conductive strip 72 are electrically connected to a power controller 11, which is connected to an external power source. The second power-receiving base 9 is electrically connected to an electrical appliance embedded in the top plate 4 and / or the layer plate 6. The electrical appliance is a light strip, a built-in LED light source, or a colored light strip.

[0033] Please refer to Figure 7 Preferably, the conductive rail 7 is injection molded from insulating engineering plastic. The front side of the conductive rail 7 is provided with a first guide groove and a second guide groove that are parallel and spaced apart along the length direction. The first guide groove and the second guide groove are respectively embedded with a positive conductive strip 71 and a negative conductive strip 72.

[0034] Please refer to Figure 1 , Figure 2 , Figure 10The right side plate 2 has a wire hole on the upper side of the first groove position 202 at the height position corresponding to the mounting top plate 4. The power controller is located on the top surface of the top plate 4. The power controller is electrically connected to the first power take-off base 8 in the first groove position 202 through the wire hole via a power cord. The power is conducted to the positive conductive strip 71 and the negative conductive strip 72 through the first power take-off base 8 in the first groove position 202.

[0035] Please refer to Figure 8 , Figure 9 The first power-receiving base 8 includes a first front shell 81, a first PCB board 82, and a first bottom shell 83. The first power-receiving terminal is a positive conductive spring 86 and a negative conductive spring 87 disposed on the first PCB board 82. The first front shell 81 is provided with a first through hole and a second through hole arranged side by side to expose the positive conductive spring 86 and the negative conductive spring 87 respectively. The top rear end of the first PCB board 82 is provided with a first positive plug hole and a first negative plug hole for the insertion connection of the first positive pin 84 and the first negative pin 85. The rear ends of the first front shell 81 and the first bottom shell 83 are provided with holes through which the first positive pin 84 and the first negative pin 85 pass. The bottom surface of the first PCB board 82 is provided with a first positive and negative solder pad for connecting power lines to be soldered. The first bottom shell 83 is provided with a wire through hole 831 for the power line to pass through. The first front shell 81 and the first bottom shell 83 are connected and fixed by screws.

[0036] Preferably, the first faceplate 81 has a countersunk hole 811 at its center, the inner wall of the countersunk hole 811 extends downward, and the first PCB board 82 has a first through hole that passes through the inner wall of the countersunk hole 811. The first bottom shell 83 has a second through hole that engages with the countersunk hole 811. The first power supply base 8 is fixed in the first groove 202 by inserting a screw into the countersunk hole 811.

[0037] Please refer to Figure 9 , Figure 10 The second power-receiving base 9 includes a second front shell 91, a second PCB board 92, and a second bottom shell 93. The second power-receiving terminal is provided with a second positive electrode pin 94 and a second negative electrode pin 95 on the second PCB board 92. The top surface of the second PCB board 92 is provided with a second positive electrode insertion hole and a second negative electrode insertion hole for plugging in the second positive electrode pin 94 and the second negative electrode pin 95. The second front shell 91 and the second bottom shell 93 are snapped together.

[0038] Preferably, the second PCB board 92 is provided with second positive and negative pads, which are connected to a power cable 96 with a DC power plug. The second housing 91 is provided with a third through hole for threading the power cable 96 through, and the DC power plug is used to connect an electrical appliance. It should be understood that the electrical appliance can be designed to integrate the second power outlet 9, with the second power outlet 9 provided on the side of the electrical appliance.

[0039] Preferably, the second face shell 91 is provided with a latch 911 on the left and right sides, and the second bottom shell 93 is provided with a first elastic latching part 931 on the left and right sides that engages with the latch 911. The first elastic latching part 931 includes a connecting arm perpendicular to the second bottom shell 93. The front end of the connecting arm is provided with a barb protruding outward. The second face shell 91 is provided with a second elastic latching part 912 on the front and rear sides. The second elastic latching part 912 is a cantilever elastic buckle formed by a cut on the second face shell 91. The front end of the cantilever elastic buckle is provided with a barb protruding outward. The barb is used to set the second power supply 9 in the second groove position 601 and to elastically latch the groove wall of the second groove position 601.

[0040] Please refer to Figures 14 to 16 By extending the conductive rail 7 into an L-shaped conductive rail 7-1, the width of the corresponding long slot 201 is adapted to the L-shaped conductive rail 7-1. After the L-shaped conductive rail 7-1 is embedded in the long slot 201, a slot is still formed. At this time, the corresponding back plate 3 is inserted into the slot. By setting the same slot on the left side plate 1, the back plate 3 does not need to be fixed by side screws. It is fixed to the left side plate 1 and the right side plate 2 by inserting it into the slot. The left side plate 1 and the right side plate 2 are fixed by the top plate 4 and the bottom plate 5 connected to the upper and lower ends of the left side plate 1 and the right side plate 2.

[0041] The concealed conductive structure of this solution utilizes a long slot 201 vertically along the inner wall of the rear end of the right side panel 2. This allows the conductive rail 7 to cover the entire height of the cabinet's interior space. Therefore, multiple first recessed slots 202 at different heights can be provided. Corresponding to the first recessed slot 202, the inner wall of the right side panel 2 has a shelf support structure for receiving the shelf 6. The shelf 6 can be freely inserted into the shelf support at different heights. Simultaneously, the second power outlet 9 on the side of the shelf 6 is electrically connected to the first power outlet 8 located in the first recessed slot 202, thereby enabling free adjustment of the shelf height and quick, wireless power supply to electrical appliances. Since the left side panel 1 and right side panel 2 are symmetrical structures of the cabinet, it should be understood that the long slot 201 and first recessed slot 202 on the left side panel 1, and the second recessed slot 601 on the left side of the top panel 4 and shelf 6 are mirror images. Therefore, the steps are not described in detail.

[0042] The parts not described in detail in this technical solution specification are obvious to those skilled in the art and can be supplemented and improved based on existing technical knowledge. At the same time, those skilled in the art should understand that the above embodiments are merely preferred embodiments of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A cabinet-type concealed conductive structure with adjustable shelf contact power supply and height, comprising a cabinet, wherein the cabinet is a storage cavity structure formed by a left side panel (1), a right side panel (2), a back panel (3), a top panel (4), and a bottom panel (5), with a hollow interior at the front opening, the storage cavity being provided with shelves (6) dividing the storage cavity into multiple upper and lower storage compartments, characterized in that, The cabinet is provided with a hidden conductive structure. The hidden conductive structure is provided with a long groove (201) extending vertically on the inner wall of the left side panel (1) or the right side panel (2) near its rear end. The long groove (201) is embedded with a conductive rail (7). The front side of the conductive rail (7) is provided with positive conductive strips (71) and negative conductive strips (72) arranged parallel to each other along the length direction. The left and right sides of the back panel (3) are respectively connected to the inner sides of the left side panel (1) and the right side panel (2), and the thickness of the back panel (3) is sufficient to cover the groove opening of the long groove (201). The top plate (4) is connected to the inner sides of the left side plate (1) and the right side plate (2) respectively. The left side plate (1) or the right side plate (2) corresponding to the long slot (201) is provided with a first groove position (202) at the height position of the top plate (4) and the layer plate (6) respectively along the front side of the long slot (201). The rear end of the first groove position (202) is connected to the long slot (201). The first groove position (202) is embedded with a first power-taking base (8). The rear end of the first power-taking base (8) is provided with a first positive electrode pin (84) and a first negative electrode pin (85) respectively in contact with the positive electrode conductive strip (71) and the negative electrode conductive strip (72). The side of the first power-taking base (8) facing the slot of the first groove position (202) is provided with a first power-connecting end. The top plate (4) and the shelf (6) are provided with a second groove (601) on the left or right side near their rear end. The second groove (601) is embedded with a second power supply seat (9). The side of the second power supply seat (9) facing the groove of the second groove (601) is provided with a second power terminal. The second power terminal is connected to the first power terminal. The thickness of the top plate (4) and the shelf (6) is sufficient to cover the groove of the first groove (202). The positive conductive strip (71) and the negative conductive strip (72) are electrically connected to a power controller (11), which is connected to an external power source. The second power take-up base (9) is electrically connected to an electrical appliance embedded in the top plate (4) and / or the shelf (6).

2. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 1, characterized in that, The conductive rail (7) is injection molded from insulating engineering plastic. The front side of the conductive rail (7) is provided with a first guide groove and a second guide groove that are parallel and spaced along the length direction. The first guide groove and the second guide groove are respectively embedded with a positive conductive strip (71) and a negative conductive strip (72).

3. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 1, characterized in that, The upper side of the first groove (202) on the left side plate (1) or the right side plate (2) at the height position corresponding to the installation of the top plate (4) is provided with a wire hole. The power controller is set on the top surface of the top plate (4). The power controller is electrically connected to the first power take-up base (8) in the first groove (202) through the wire hole via a power cord. The power is conducted to the positive electrode conductive strip (71) and the negative electrode conductive strip (72) through the first power take-up base (8) in the first groove (202).

4. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 3, characterized in that, The first power-receiving base (8) includes a first front shell (81), a first PCB board (82), and a first bottom shell (83). The first power-receiving terminal is a positive conductive spring (86) and a negative conductive spring (87) disposed on the first PCB board (82). The first front shell (81) is provided with a first through hole and a second through hole arranged side by side at intervals to expose the positive conductive spring (86) and the negative conductive spring (87) respectively. The top rear end of the first PCB board (82) is provided with a first positive electrode pin (84). The first positive electrode insertion hole and the first negative electrode insertion hole are connected to the first negative electrode pin (85). The rear end of the first front shell (81) and the first bottom shell (83) are provided with holes through which the first positive electrode pin (84) and the first negative electrode pin (85) pass. The bottom surface of the first PCB board (82) is provided with first positive and negative electrode pads for connecting power lines to be soldered. The first bottom shell (83) is provided with a wire through hole (831) for power lines to pass through. The first front shell (81) and the first bottom shell (83) are connected and fixed by screws.

5. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 4, characterized in that, The first faceplate (81) has a countersunk hole (811) at its center. The inner wall of the countersunk hole (811) extends downward. The first PCB board (82) has a first through hole that passes through the inner wall of the countersunk hole (811). The first bottom shell (83) has a second through hole that engages with the countersunk hole (811). The first power supply base (8) is fixed in the first groove (202) by inserting a screw through the countersunk hole (811).

6. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 4, characterized in that, The second power receiving base (9) includes a second front shell (91), a second PCB board (92), and a second bottom shell (93). The second power receiving end is provided with a second positive electrode pin (94) and a second negative electrode pin (95) on the second PCB board (92). The top surface of the second PCB board (92) is provided with a second positive electrode insertion hole and a second negative electrode insertion hole for plugging in the second positive electrode pin (94) and the second negative electrode pin (95). The second front shell (91) and the second bottom shell (93) are snapped together.

7. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 6, characterized in that, The second PCB board (92) is provided with a second positive and negative pad, and the second positive and negative pad is connected to a power wire (96) with a DC power plug. The second shell (91) is provided with a third through hole for passing through the power wire (96). The DC power plug is used to connect electrical appliances.

8. The cabinet-type concealed conductive structure with shelf contact power extraction and freely adjustable height as described in claim 6, characterized in that, The second face shell (91) has a snap-fit ​​(911) on its left and right sides. The second bottom shell (93) has a first elastic snap-fit ​​part (931) on its left and right sides that engages with the snap-fit ​​(911). The first elastic snap-fit ​​part (931) includes a connecting arm perpendicular to the second bottom shell (93). The front end of the connecting arm has a barb that protrudes outward. The second face shell (91) has a second elastic snap-fit ​​part (912) on its front and rear sides. The second elastic snap-fit ​​part (912) is a cantilever elastic buckle formed by a cut on the second face shell (91). The front end of the cantilever elastic buckle has a barb that protrudes outward.

Images