Electronic equipment and snap-on modules

Abstract

The present invention provides an electronic device and a buckle module, the electronic device comprises a first shell, a second shell, a first buckle, a second buckle, an elastic member and a pull-out twist, the first buckle and the second buckle are elastically stretched out of the first shell by the elastic member; the pull-out twist is slidably matched with the first shell and matched with the inclined surfaces of the first buckle and the second buckle, and when the pull-out twist slides, the first buckle and the second buckle are driven to approach each other and compress the elastic member so that the first buckle and the second buckle are retracted into the first shell; the pull-out twist is provided with an anti-drop protrusion, and when the pull-out twist is in a locked state, the distance between the anti-drop protrusion and the inner ends of the first buckle and the second buckle is smaller than the distance between the first buckle and the second buckle and the second shell. The electronic device and the buckle module provided by the present invention have novel structures, are easy to use, and have good anti-loosening effects.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile communication equipment, and in particular to an electronic device and a snap-on module. Background Art

[0002] Mobile communication devices, such as walkie-talkies and mobile phones, have long become indispensable products in people's daily lives. As mobile communication devices need to be used frequently on the move, higher requirements are placed on the quality and durability of such products.

[0003] Generally speaking, mobile communication devices such as walkie-talkies or mobile phones are mainly composed of two parts: a host and a battery module. Slide grooves matching the battery module are provided on both sides of the host. The battery module is horizontally slidably connected to the host through the slide grooves, and the battery module supplies power to the host to realize the communication function. When in use, on the one hand, since the battery module often needs to be removed for charging or replacement, the connection between the battery module and the host must be active; on the other hand, the connection between the battery module and the host must have a certain degree of stability, otherwise the battery module is likely to be separated from the host when the movement is large or accidentally dropped, causing communication interruption.

[0004] In order to solve this problem, a battery latch structure is designed in existing products. However, the existing battery latch structure has poor anti-drop performance, and the battery module is easy to fall off when it falls. Summary of the invention

[0005] The present invention provides an electronic device and a buckle module to solve the technical problem in the prior art that the battery latch structure has poor anti-drop performance and the battery module is easy to fall off when falling.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an electronic device, the electronic device comprises a first housing, a second housing, a first hanging buckle, a second hanging buckle, an elastic member and a pull-twist, wherein:

[0007] The first housing is provided with a locking cavity for accommodating and assembling the first hook, the second hook, the elastic member and the puller;

[0008] The first hook and the second hook are elastically stretched out by the elastic member to extend out of the first shell, and are elastically retracted and reset to be buckled with the second shell when the second shell is matched with the first shell;

[0009] The pull knob is slidably matched with the first shell and hooked with the first hook and the second hook. When the pull knob slides in a direction away from the first shell, it drives the first hook and the second hook to approach each other and compresses the elastic member so that the first hook and the second hook are retracted into the first shell.

[0010] Wherein, the pull-twist is provided with an anti-drop protrusion. When the pull-twist is in a locked state, the distance between the anti-drop protrusion and the inner ends of the first hook and the second hook is smaller than the distance that the first hook and the second hook extend out of the first shell.

[0011] According to an embodiment of the present invention, the anti-drop protrusion is matched with the inner ends of the first hanging buckle and the second hanging buckle in an inclined surface.

[0012] According to one embodiment of the present invention, the locking cavity includes a main wall, side walls arranged on both sides of the main wall, and end walls arranged at one end of the main wall and the two side walls, and the side wall is provided with a through hole to allow the outer ends of the first hook and the second hook to pass through.

[0013] According to an embodiment of the present invention, a sliding stopper is provided on the main body wall, and the sliding stopper and the end wall form a sliding groove for assembling the first hanging buckle and the second hanging buckle.

[0014] According to an embodiment of the present invention, the thickness of the first hanging buckle and the second hanging buckle is greater than the height of the sliding stopper, and the portions of the first hanging buckle and the second hanging buckle that are higher than the sliding stopper cooperate with the inclined surface of the anti-fall protrusion.

[0015] According to an embodiment of the present invention, guide ribs are further provided on the side walls and the end walls, and the pull-twist block is provided with assembly grooves matching the guide ribs.

[0016] According to an embodiment of the present invention, the main body wall is further provided with a limiting rib, the limiting rib is arranged on the side of the sliding block away from the first hook and the second hook, and the pull-twist is provided with a limiting buckle matching the limiting rib.

[0017] According to one embodiment of the present invention, the sliding stopper includes two blocks arranged at an interval, the limiting buckle protrudes from the surface of the anti-drop protrusion, the anti-drop protrusion is located on the upper part of the sliding stopper, and the limiting buckle is located between the two sliding stoppers.

[0018] According to an embodiment of the present invention, both the first hanging buckle and the second hanging buckle are provided with connecting columns, and both ends of the elastic member are sleeved on the connecting columns.

[0019] According to an embodiment of the present invention, the first hook and the second hook are both provided with a recessed portion on a side away from the connecting column, and the pull-twist is provided with a convex block portion that hooks with the recessed portion, and the convex block portion and the recessed portion form an inclined surface.

[0020] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a buckle module, the buckle module includes a first shell, a first hook, a second hook, an elastic member and a pull-twist, wherein:

[0021] The first housing is provided with a locking cavity for accommodating and assembling the first hook, the second hook, the elastic member and the puller;

[0022] The first hook and the second hook are elastically stretched out by the elastic member to extend out of the first shell, and are elastically retracted and reset to be buckled with the second shell when the second shell is matched with the first shell;

[0023] The pull knob is slidably matched with the first shell and hooked with the first hook and the second hook. When the pull knob slides in a direction away from the first shell, it drives the first hook and the second hook to approach each other and compresses the elastic member so that the first hook and the second hook are retracted into the first shell.

[0024] Wherein, the pull-twist is provided with an anti-drop protrusion. When the pull-twist is in a locked state, the distance between the anti-drop protrusion and the inner ends of the first hook and the second hook is smaller than the distance that the first hook and the second hook extend out of the first shell.

[0025] According to one embodiment of the present invention, a sliding stop block is provided on the main body wall, and the sliding stop block and the end wall form a sliding groove for assembling the first hook and the second hook, the thickness of the first hook and the second hook is greater than the height of the sliding stop block, and the parts of the first hook and the second hook that are higher than the sliding stop block cooperate with the inclined surface of the anti-fall protrusion, and the main body wall is also provided with a limiting rib, and the limiting rib is arranged on the side of the sliding stop block away from the first hook and the second hook, and the pull-twist is provided with a limiting buckle matching the limiting rib, and the limiting buckle protrudes from the surface of the anti-fall protrusion.

[0026] The beneficial effects of the present invention are as follows: different from the prior art, the electronic device and the buckle module provided by the present invention have novel structures. Since an anti-fall protrusion is provided, and the distance between the anti-fall protrusion and the inner ends of the first hook and the second hook is smaller than the distance that the first hook and the second hook extend out of the first shell, when the electronic device is subjected to a falling impact, the anti-fall protrusion is used to support the first hook and the second hook to prevent the first hook and the second hook from retracting into the first shell and disengaging from the second shell, and the anti-loosening effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0028] Figure 1 is a schematic diagram of an exploded structure of an electronic device provided by an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 A right-side structural schematic diagram of an electronic device shown in ;

[0030] Figure 3 yes Figure 1 A schematic diagram of the main structure of the electronic device shown in ;

[0031] Figure 4 yes Figure 3 A schematic diagram of a cross-sectional structure of an electronic device at AA shown in FIG.

[0032] Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure of the electronic device shown in FIG.

[0033] Figure 6 yes Figure 1 A partial enlarged structural schematic diagram of an electronic device shown in ;

[0034] Figure 7 yes Figure 1 A schematic diagram of the three-dimensional structure of the first hanging buckle, the second hanging buckle and the elastic member of the electronic device shown in ;

[0035] Figure 8 yes Figure 1 Schematic diagram of the three-dimensional structure of the twisted electronic device shown in FIG. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Please also read Figures 1 to 8 The present invention provides an electronic device 10, which includes a first housing 100, a second housing 200, a first hook 310, a second hook 320, an elastic member 330, and a puller 400. The electronic device 10 can be an electronic device such as a walkie-talkie, a speaker, a mobile phone, a navigator, etc.

[0040] like Figure 4-Figure 6 As shown, the first housing 100 is provided with a locking cavity 110 for receiving and assembling the first hanging buckle 310 , the second hanging buckle 320 , the elastic member 330 and the puller 400 .

[0041] The first hook 310 and the second hook 320 are elastically stretched out by the elastic member 330 to extend out of the first housing 100 and elastically retract and reset to buckle with the second housing 200 when the second housing 200 is matched with the first housing 100. The elastic member 330 can be a spring or other elastic component.

[0042] The pull knob 400 is slidably engaged with the first shell 100 and is hooked with the first hook 310 and the second hook 320. When the pull knob 400 slides in a direction away from the first shell 100 (not shown in the figure), it drives the first hook 310 and the second hook 320 to approach each other and compress the elastic member 330 so that the first hook 310 and the second hook 320 are retracted into the first shell 100 and then released from the fastening with the second shell 200.

[0043] The pull-twist 400 is provided with an anti-falling protrusion 410. When the pull-twist 400 is in a locked state (refer to Figure 4 and Figure 5), the distance between the anti-fall protrusion 410 and the inner ends of the first hook 310 and the second hook 320 is less than the distance that the first hook 310 and the second hook 320 extend out of the first shell 100. When the electronic device 10 is subjected to a falling impact, the anti-fall protrusion 410 is used to resist the first hook 310 and the second hook 320 to prevent the first hook 310 and the second hook 320 from retracting into the first shell 100 and disengaging from the second shell 200.

[0044] For example, the distance that the first hook 310 and the second hook 320 extend out of the first shell 100 is 10 mm, and when the pull-twist block 400 is in a locked state, the distance between the anti-drop protrusion 410 and the inner ends of the first hook 310 and the second hook 320 is 1 mm. When the electronic device 10 is subjected to a falling impact, the first hook 310 and the second hook 320 need to be retracted 10 mm to allow the first shell 100 to be disengaged from the second shell 200. By adding the anti-drop protrusion 410, the present invention allows the first hook 310 and the second hook 320 to only be retracted 1 mm when the electronic device 10 is subjected to a falling impact, so that the first shell 100 cannot be disengaged from the second shell 200.

[0045] The electronic device 10 further includes a battery 500, and the first housing 100 further includes a main cavity 120 (refer to Figure 4 and Figure 5 ), the main cavity 120 is used to accommodate and fix the battery 500, the main cavity 120 is formed by the inner surface of the first shell 100, and the locking cavity 110 is formed by the outer surface of the first shell 100. The battery 500 and the first shell 100 are combined to form a detachable accessory relative to the second shell 200.

[0046] like Figure 1 As shown, the locking cavity 110 is located at one end of the first shell 100, and the electronic device 10 also includes a charging contact 510, which is electrically connected to the battery 500. A through hole 102 is provided on the surface of the first shell 100, and the charging contact 510 is fixed to the first shell 100 and exposed through the through hole 102.

[0047] like Figure 5 As shown, the anti-drop protrusion 410 is matched with the inner ends of the first hook 310 and the second hook 320 in an inclined plane.

[0048] like Figure 6 As shown, the locking cavity 110 includes a main wall 111, side walls 112 arranged on both sides of the main wall 111, and an end wall 113 arranged at one end of the main wall 111 and the two side walls 112. A through hole 114 is formed on the side wall 112 to allow the outer ends of the first hook 310 and the second hook 320 to pass through.

[0049] like Figures 4 to 6As shown, a sliding stopper 115 is disposed on the main body wall 111 , and the sliding stopper 115 and the end wall 113 form a sliding groove for assembling the first hanging buckle 310 and the second hanging buckle 320 .

[0050] The thickness of the first hook 310 and the second hook 320 is greater than the height of the sliding block 115, and the portions of the first hook 310 and the second hook 320 that are higher than the sliding block 115 are matched with the inclined surface of the anti-fall protrusion 410 (refer to Figure 5 ).

[0051] like Figure 6 and Figure 8 As shown, the side wall 112 and the end wall 113 are further provided with guide ribs 116, and the puller 400 is provided with a mounting groove 420 matching the guide ribs 116. The guide ribs 116 and the mounting groove 420 are both U-shaped, and the guide ribs 116 and the mounting groove 420 can form an interference fit. The main body wall 111 is also provided with a limit stop rib 117, which is arranged on the side of the sliding block 115 away from the first hook 310 and the second hook 320, and the puller 400 is provided with a limit buckle 430 matching the limit stop rib 117.

[0052] like Figure 4 , Figure 5 as well as Figure 8 As shown, the sliding block 115 includes two blocks that are spaced apart, the limiting buckle 430 protrudes from the surface of the anti-drop protrusion 410 , the anti-drop protrusion 410 is located at the upper part of the sliding block 115 , and the limiting buckle 430 is located between the two sliding blocks 115 .

[0053] like Figure 7 and Figure 8 As shown, the first hanging buckle 310 and the second hanging buckle 320 are both provided with a connecting column 311 , and the elastic member 330 is a spring, and both ends of the spring are sleeved on the connecting column 311 .

[0054] The first hook 310 and the second hook 320 are both provided with a recessed portion 312 on the side away from the connecting column 311, and the puller 400 is provided with a convex portion 440 that is hooked and matched with the recessed portion 312. The convex portion 440 and the recessed portion 312 form an inclined surface, and the convex portion 440 and the recessed portion 312 are both triangular blocks.

[0055] Among them, the end wall 113 is also provided with an auxiliary assembly hole 118. When the puller 400 is assembled with the first hook 310, it is necessary to first use a special tool to pass through the auxiliary assembly hole 118 to gather the first hook 310 and the second hook 320 (for example, the special tool is tweezers, and small holes are provided at the bottom of the first hook 310 and the second hook 320), and then insert the puller 400 into alignment with the guide rib 116. At this time, the limit buckle 430 slides over the top of the limit baffle 117 through extrusion deformation. After removing the special tool, the recessed parts 312 of the first hook 310 and the second hook 320 will form a hook fit with the protruding block part 440 of the puller 400. When it is necessary to release the fastening between the first shell 100 and the second shell 200, slide the pull knob 400 in the direction away from the first shell 100. At this time, the limit buckle 430 can be limited by the limit barrier rib 117, so that the pull knob 400 will not be completely separated from the first shell 100. At the same time, the first hook 310 and the second hook 320, based on the cooperation of the recessed portion 312 and the inclined surface of the protruding block portion 440, shrink the elastic member 330 and close it, so that the first hook 310 and the second hook 320 are retracted into the first shell 100 and then released from the fastening with the second shell 200.

[0056] Please also read Figures 1 to 8 The present invention also provides a buckle module, which includes a first housing 100, a first buckle 310, a second buckle 320, an elastic member 330 and a puller 400. The buckle module can be combined with a battery 500 as a detachable accessory of electronic devices such as walkie-talkies, speakers, mobile phones, and navigators.

[0057] like Figure 4-Figure 6 As shown, the first housing 100 is provided with a locking cavity 110 for receiving and assembling the first hanging buckle 310 , the second hanging buckle 320 , the elastic member 330 and the puller 400 .

[0058] The first hook 310 and the second hook 320 are elastically stretched out of the first housing 100 by the elastic member 330, and the outer ends of the first hook 310 and the second hook 320 can be elastically retracted when receiving a pushing force. The elastic member 330 can be a spring or other elastic member.

[0059] The pull knob 400 is slidably matched with the first shell 100 and hooked with the first hook 310 and the second hook 320. When the pull knob 400 slides in a direction away from the first shell 100 (not shown in the figure), it drives the first hook 310 and the second hook 320 to approach each other and compress the elastic member 330 so that the first hook 310 and the second hook 320 are retracted into the first shell 100.

[0060] The pull-twist 400 is provided with an anti-falling protrusion 410. When the pull-twist 400 is in a locked state (refer to Figure 4 and Figure 5), the distance between the anti-drop protrusion 410 and the inner ends of the first hook 310 and the second hook 320 is less than the distance that the first hook 310 and the second hook 320 extend out of the first shell 100.

[0061] like Figure 5 As shown, the anti-drop protrusion 410 is matched with the inner ends of the first hook 310 and the second hook 320 in an inclined plane.

[0062] like Figure 6 As shown, the locking cavity 110 includes a main wall 111, side walls 112 arranged on both sides of the main wall 111, and an end wall 113 arranged at one end of the main wall 111 and the two side walls 112. A through hole 114 is formed on the side wall 112 to allow the outer ends of the first hook 310 and the second hook 320 to pass through.

[0063] like Figures 4 to 6 As shown, a sliding block 115 is provided on the main body wall 111, and the sliding block 115 and the end wall 113 form a slide groove for assembling the first hook 310 and the second hook 320. The thickness of the first hook 310 and the second hook 320 is greater than the height of the sliding block 115, and the portion of the first hook 310 and the second hook 320 that is higher than the sliding block 115 cooperates with the inclined surface of the anti-fall protrusion 410 (refer to Figure 5 ), the main body wall 111 is also provided with a limiting rib 117, the limiting rib 117 is arranged on the side of the sliding block 115 away from the first hook 310 and the second hook 320, the pull-twist 400 is provided with a limiting buckle 430 matching the limiting rib 117, and the limiting buckle 430 protrudes from the surface of the anti-fall protrusion 410.

[0064] The electronic device 10 and the buckle module provided by the present invention have a novel structure. Since an anti-drop protrusion 410 is provided, and the distance between the anti-drop protrusion 410 and the inner ends of the first hook 310 and the second hook 320 is smaller than the distance that the first hook 310 and the second hook 320 extend out of the first shell 100, when the electronic device 10 is subjected to a falling impact, the anti-drop protrusion 410 is used to resist the first hook 310 and the second hook 320 to prevent the first hook 310 and the second hook 320 from retracting into the first shell 100 and disengaging from the second shell 200, and the anti-loosening effect is better.

[0065] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electronic device, characterized in that: The electronic device comprises a first housing, a second housing, a first hook, a second hook, an elastic member and a pull-twist mechanism, wherein: The first housing is provided with a locking cavity for accommodating and assembling the first hook, the second hook, the elastic member and the puller; The first hook and the second hook are elastically stretched out by the elastic member to extend out of the first shell, and are elastically retracted and reset to be buckled with the second shell when the second shell is matched with the first shell; The pull knob is slidably matched with the first shell and hooked with the first hook and the second hook. When the pull knob slides in a direction away from the first shell, it drives the first hook and the second hook to approach each other and compresses the elastic member so that the first hook and the second hook are retracted into the first shell. Wherein, the pull-twist is provided with an anti-drop protrusion, and when the pull-twist is in a locked state, the distance between the anti-drop protrusion and the inner ends of the first hook and the second hook is smaller than the distance that the first hook and the second hook extend out of the first shell; The first hook and the second hook respectively have an inner end and an outer end, the outer ends of the first hook and the second hook are respectively used to buckle with the second shell when the second shell is matched with the first shell, and the inner ends of the first hook and the second hook are arranged opposite to each other.

2. The electronic device according to claim 1, characterized in that: The anti-drop protrusion is matched with the inner ends of the first hanging buckle and the second hanging buckle in an inclined surface.

3. The electronic device according to claim 1, characterized in that: The lock buckle cavity includes a main body wall, side walls arranged on both sides of the main body wall, and end walls arranged at one end of the main body wall and the two side walls. The side walls are formed with through holes to allow the outer ends of the first hook and the second hook to pass through.

4. The electronic device according to claim 3, characterized in that: A sliding stopper is provided on the main body wall, and the sliding stopper and the end wall form a sliding groove for assembling the first hanging buckle and the second hanging buckle.

5. The electronic device according to claim 4, characterized in that: The thickness of the first hanging buckle and the second hanging buckle is greater than the height of the sliding stopper, and the parts of the first hanging buckle and the second hanging buckle that are higher than the sliding stopper cooperate with the inclined surface of the anti-fall protrusion.

6. The electronic device according to claim 3, characterized in that: The side wall and the end wall are also provided with guide ribs, and the pull-twist block is provided with an assembly groove matching the guide ribs.

7. The electronic device according to claim 4, characterized in that: The main body wall is also provided with a limiting retaining rib, and the limiting retaining rib is arranged on a side of the sliding stopper away from the first hook and the second hook, and the pull-twist is provided with a limiting buckle matching the limiting retaining rib.

8. The electronic device according to claim 7, characterized in that: The sliding stopper includes two blocks that are spaced apart from each other, the limiting buckle protrudes from the surface of the anti-fall protrusion, the anti-fall protrusion is located at the upper part of the sliding stopper, and the limiting buckle is located between the two sliding stoppers.

9. The electronic device according to claim 1, characterized in that: The first hanging buckle and the second hanging buckle are both provided with connecting columns, and the two ends of the elastic member are sleeved on the connecting columns.

10. The electronic device according to claim 9, characterized in that: The first hook and the second hook are both provided with a recessed portion on a side away from the connecting column, and the pull-twist is provided with a convex block portion that is hooked and matched with the recessed portion, and the convex block portion and the recessed portion form an inclined surface match.

11. A buckle assembly module, characterized in that: The buckle module includes a first shell, a second shell, a first hook, a second hook, an elastic member and a pull-twist, wherein: The first housing is provided with a locking cavity for accommodating and assembling the first hook, the second hook, the elastic member and the puller; The first hook and the second hook are elastically stretched out by the elastic member to extend out of the first shell, and are elastically retracted and reset to be buckled with the second shell when the second shell is matched with the first shell; The pull knob is slidably matched with the first shell and hooked with the first hook and the second hook. When the pull knob slides in a direction away from the first shell, it drives the first hook and the second hook to approach each other and compresses the elastic member so that the first hook and the second hook are retracted into the first shell. Wherein, the pull-twist is provided with an anti-drop protrusion, and when the pull-twist is in a locked state, the distance between the anti-drop protrusion and the inner ends of the first hook and the second hook is smaller than the distance that the first hook and the second hook extend out of the first shell; The first hook and the second hook respectively have an inner end and an outer end, the outer ends of the first hook and the second hook are respectively used to buckle with the second shell when the second shell is matched with the first shell, and the inner ends of the first hook and the second hook are arranged opposite to each other.

12. The mounting module according to claim 11, characterized in that: The anti-drop protrusion is matched with the inner ends of the first hanging buckle and the second hanging buckle in an inclined surface.

13. The mounting module according to claim 11, characterized in that: The lock buckle cavity includes a main body wall, side walls arranged on both sides of the main body wall, and end walls arranged at one end of the main body wall and the two side walls. The side walls are formed with through holes to allow the outer ends of the first hook and the second hook to pass through.

14. The mounting module according to claim 13, characterized in that: A sliding stopper is provided on the main body wall, and the sliding stopper and the end wall form a sliding groove for assembling the first hook and the second hook, the thickness of the first hook and the second hook is greater than the height of the sliding stopper, and the parts of the first hook and the second hook that are higher than the sliding stopper cooperate with the inclined surface of the anti-fall protrusion, and the main body wall is also provided with a limiting rib, and the limiting rib is arranged on the side of the sliding stopper away from the first hook and the second hook, and the pull-twist is provided with a limiting buckle matching the limiting rib, and the limiting buckle protrudes from the surface of the anti-fall protrusion.

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