Multifunctional equipment interface innovative structure special for outdoor power supply

Abstract

The utility model discloses a multifunctional equipment interface innovative structure specially used for outdoor power supply, comprising a conductive wire harness, a false wrapping housing assembly, a PCB board and a rotating seat assembly, the PCB board is arranged in the false wrapping housing assembly, the rotating seat assembly is rotatably arranged on the false wrapping housing assembly, the false wrapping housing assembly is provided with a plurality of gear grooves, and the rotating seat assembly is rotatably arranged on the false wrapping housing assembly. A gear piece is movably arranged on the rotating seat assembly, and the gear piece is inserted into the gear groove or retreats from the gear groove along with rotation of the rotating seat assembly; the tail end of the conductive wire harness is inserted into the false package shell assembly and is electrically connected with the false package PCB, the head end of the conductive wire harness penetrates out of the rotating seat assembly, the head end of the conductive wire harness is electrically connected with a male plug wire harness, and the male plug wire harness is electrically connected with a power supply. The angle between the false package shell assembly and the machine interface can be adjusted through the rotating seat assembly, the rotation angle of the rotating seat assembly is limited through mutual cooperation of the gear piece and the gear groove, and wiring of the machine and the false package shell assembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of quick-connect interfaces, and in particular to an innovative structure of a multifunctional device interface dedicated to outdoor power supply. Background Art

[0002] When equipment such as lawn mowers are used outdoors, they need to be powered by outdoor power supply equipment. In the existing technology, machines such as lawn mowers are directly connected to power supply equipment through conductive wiring harnesses. The operating angles of different machines are different. When wiring the machine and the power supply equipment, the fixed angle makes wiring inconvenient, and this needs to be improved. Summary of the Invention

[0003] The utility model addresses the defects in the prior art such as the inconvenience of wiring between the machine and power supply equipment such as battery packs due to the fixed angle during wiring, and provides a new innovative structure of a multifunctional device interface dedicated to outdoor power supply.

[0004] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0005] An innovative structure of a multifunctional device interface dedicated to outdoor power supply includes a conductive wire harness, a dummy package shell assembly, a PCB board and a rotating seat assembly, the PCB board is arranged in the dummy package shell assembly, the rotating seat assembly is rotatably arranged on the dummy package shell assembly, a plurality of gear slots are opened on the dummy package shell assembly, a gear member is movably provided on the rotating seat assembly, and the gear member is inserted into or withdrawn from the gear slot as the rotating seat assembly rotates; the tail end of the conductive wire harness is inserted into the dummy package shell assembly and electrically connected to the dummy package PCB board, the head end of the conductive wire harness passes through the rotating seat assembly, the head end of the conductive wire harness is electrically connected to a male plug wire harness, and the male plug wire harness is electrically connected to a power supply.

[0006] The rotating seat assembly drives the conductive wiring harness to rotate, thereby adjusting the angle of the interface between the dummy package shell assembly and the machine, facilitating the wiring of the machine and the dummy package shell assembly, and improving the practicality of the overall structure; through the mutual cooperation of the gear piece and the gear slot, the rotation angle of the rotating seat assembly is limited, further improving the convenience of wiring the machine and the power supply equipment.

[0007] Preferably, the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply, the conductive wire harness, the dummy shell assembly, the PCB board, the rotating seat assembly and the gear member constitute the interface body, the number of the interface bodies is multiple, the tail end of the male plug harness is electrically connected to one of the PCB boards, the head end of the male plug harness is electrically connected to a power source, and the adjacent PCB boards are electrically connected through the conductive wire harness.

[0008] By controlling the number of interface bodies, different power supply voltages can be provided, thereby being able to power machines with inconsistent power supply voltage requirements, further improving the practicality of the overall structure.

[0009] Preferably, the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply, the fake package shell assembly includes a fake package upper cover, a fake package lower cover, a battery button and a release spring, the fake package lower cover is provided with a plug-in tube, the fake package upper cover is provided with a button slot, and the upper part of the battery button is provided with a snap slot; one end of the release spring is inserted into the plug-in tube, and the other end of the release spring is against the battery button, and the release spring pushes the battery button to stick to the inner surface of the fake package upper cover, and the upper part of the battery button passes through the button slot.

[0010] The fake package shell assembly can be snapped onto the machine through the snap groove, and the fake package shell assembly can be removed from the machine by pressing the battery button. It has the advantages of simple structure and ease of use; the release spring can be supported by the plug-in tube, which improves the smoothness of the release spring pushing the battery button to reset.

[0011] Preferably, the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply is provided with a through hole on the lower cover of the fake package, and the inner surface of the lower cover of the fake package is provided with a mounting column located outside the through hole. The PCB board is provided with a mounting hole and also includes a first fastener, which passes through the mounting hole and is screwed into the mounting column. The PCB board is opposite to the through hole, and the end of the conductive wire bundle passes through the through hole and is electrically connected to the PCB board.

[0012] The PCB board is fixed to the lower cover of the dummy package through the mutual cooperation of the first fastener, the mounting hole, and the mounting column, which has the advantages of simple structure, easy assembly and firm fixation; the mounting column creates a gap between the PCB board and the inner surface of the lower cover of the dummy package, which facilitates the welding of the conductive harness to the PCB board.

[0013] Preferably, in the above-mentioned innovative structure of a multi-functional device interface dedicated to outdoor power supply, a support plate is provided on the inner surface of the fake package lower cover, the support plates are symmetrically arranged on both sides of the through hole, and the mounting column is provided on the support plate; an extension block protruding away from the fake package lower cover is provided on the support plate, a limiting notch corresponding to the extension block is opened on the PCB board, the extension block is inserted into the corresponding limiting notch, and the limiting notch is adapted to the shape of the extension block.

[0014] The support plate increases the support area of ​​the PCB and improves the stability of the PCB. The extension block cooperates with the limiting notch to limit the PCB. When the first fastener is tightened in the mounting column, the PCB will not rotate, facilitating installation.

[0015] Preferably, the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply comprises a rotating seat assembly including a rotating seat upper cover, a rotating seat lower cover and a fixed ring, the fixed ring including an inner ring and an outer ring arranged on the inner ring, the outer diameter of the outer ring is larger than the outer diameter of the inner ring, the inner ring is inserted into the through hole and plugged into the through hole, the inner side wall of the outer ring is in contact with the inner surface of the dummy package lower cover; the outer surface of the rotating seat lower cover is in contact with the outer surface of the dummy package lower cover, and further comprising a second fastener, the inner ring being detachably arranged on the rotating seat lower cover by the second fastener, and the rotating seat assembly rotates around the through hole;

[0016] The shift member includes a steel ball and a return spring. A movable groove is provided on the side of the lower cover of the rotating seat facing the shift groove. The steel ball and the return spring are inserted into the movable groove. The return spring pushes the end of the steel ball to protrude from the movable groove. The shift groove is hemispherical. The steel ball is inserted into the shift groove or withdrawn from the shift groove as the rotating seat assembly rotates.

[0017] The outer ring can be used to limit the depth of the fixed ring inserted into the through hole. The outer ring and the lower cover of the rotating seat are clamped on both sides of the lower cover of the dummy package, thereby improving the stability of the rotating seat assembly when rotating on the lower cover of the dummy package. The movable groove can limit and support the reset spring, and the steel ball can improve the smoothness and accuracy of the shift piece being inserted into or withdrawn from the shift slot.

[0018] Preferably, the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply is provided with a positioning groove coaxially arranged with the through hole on the lower cover of the fake package, and the gear grooves are circumferentially distributed in the positioning groove; a protrusion is provided on the lower cover of the rotating seat, the inner diameter of the positioning groove is adapted to the outer diameter of the protrusion, the protrusion is inserted into the positioning groove and plug-fitted, and the inner ring is detachably arranged on the protrusion by a second fastener.

[0019] The positioning groove and the protrusion improve the stability of the rotating seat assembly when it is rotated on the dummy package shell assembly, and at the same time, the exterior of the rotating seat assembly protrudes from the dummy package shell assembly, making it easier to rotate the rotating seat assembly.

[0020] Preferably, in the above-mentioned innovative structure of a multifunctional device interface dedicated to outdoor power supply, a first limit block is provided on the inner surface of the lower cover of the fake package, a second limit block is provided on the outer ring, the first limit block is located on the rotation path of the second limit block, and the first limit block and the second limit block are offset or separated.

[0021] The first limiting block and the second limiting block can be used to locate the position where the fixing ring is inserted into the through hole, thereby improving the convenience of using the second fastener to fix the fixing ring and the lower cover of the rotating seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 The utility model is provided with a plurality of structural diagrams of the interface body;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the dummy package housing assembly, PCB board, and first fastener of the utility model;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the rotating seat assembly, the shift member, and the second fastener embodied in the present invention;

[0026] Figure 5 This is a schematic diagram of the explosion structure of the lower cover and fixing ring of the false package of the utility model;

[0027] Figure 6 It is a cross-sectional view of the rotating seat assembly and the false bag lower cover of the utility model.

[0028] Explanation of the accompanying drawings: 1. Conductive wiring harness; 11. Male plug wiring harness; 2. Dummy package shell assembly; 20. Gear slot; 21. Dummy package upper cover; 211. Button slot; 22. Dummy package lower cover; 221. Plug-in tube; 222. Through hole; 223. Mounting column; 224. Positioning slot; 23. Battery button; 231. Snap slot; 24. Release spring; 3. PCB board; 31. Mounting hole; 32. Limiting notch; 4. Rotating seat assembly; 41. Rotating seat upper cover; 42. Rotating seat lower cover; 421. Movable slot; 422. Protrusion; 43. Fixed ring; 431. Inner ring; 432. Outer ring; 5. Gear piece; 51. Steel ball; 52. Reset spring; 6. Interface body; 7. First fastener; 71. Second fastener; 8. Support plate; 81. Extension block; 9. First limiting block; 91. Second limiting block. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 The present invention is further described in detail with reference to the following specific embodiments, but they are not intended to limit the present invention:

[0030] Example 1

[0031] like Figures 1-6As shown, an innovative structure of a multifunctional device interface dedicated to outdoor power supply includes a conductive wire harness 1, a dummy package shell component 2, a PCB board 3 and a rotating seat component 4, the PCB board 3 is arranged in the dummy package shell component 2, the rotating seat component 4 is rotatably arranged on the dummy package shell component 2, a plurality of gear slots 20 are opened on the dummy package shell component 2, a gear member 5 is movably provided on the rotating seat component 4, and the gear member 5 is inserted into the gear slot 20 or withdrawn from the gear slot 20 as the rotating seat component 4 rotates; the tail end of the conductive wire harness 1 is inserted into the dummy package shell component 2 and electrically connected to the dummy package PCB board 3, the head end of the conductive wire harness 1 passes through the rotating seat component 4, the head end of the conductive wire harness 1 is electrically connected to the male plug wire harness 11, and the male plug wire harness 11 is electrically connected to a power supply.

[0032] Preferably, the conductive wire harness 1, the dummy shell assembly 2, the PCB board 3, the rotating seat assembly 4 and the gear member 5 constitute an interface body 6, and the number of the interface bodies 6 is multiple. The tail end of the male plug harness 11 is electrically connected to one of the PCB boards 3, and the head end of the male plug harness 11 is electrically connected to a power supply, and the adjacent PCB boards 3 are electrically connected through the conductive wire harness 1.

[0033] Preferably, the fake package shell assembly 2 includes a fake package upper cover 21, a fake package lower cover 22, a battery button 23 and a release spring 24. The fake package lower cover 22 is provided with a plug-in tube 221, the fake package upper cover 21 is provided with a button slot 211, and the upper part of the battery button 23 is provided with a snap slot 231; one end of the release spring 24 is inserted into the plug-in tube 221, and the other end of the release spring 24 is against the battery button 23. The release spring 24 pushes the battery button 23 to stick to the inner surface of the fake package upper cover 21, and the upper part of the battery button 23 passes through the button slot 211.

[0034] Preferably, a through hole 222 is provided on the fake package lower cover 22, and a mounting post 223 located outside the through hole 222 is provided on the inner surface of the fake package lower cover 22. A mounting hole 31 is provided on the PCB board 3, and also includes a first fastener 7, which passes through the mounting hole 31 and is screwed into the mounting post 223. The PCB board 3 is opposite to the through hole 222, and the end of the conductive harness 1 passes through the through hole 222 and is electrically connected to the PCB board 3.

[0035] Preferably, a support plate 8 is provided on the inner surface of the fake package lower cover 22, and the support plates 8 are symmetrically arranged on both sides of the through hole 222, and the mounting column 223 is provided on the support plate 8; an extension block 81 protruding away from the fake package lower cover 22 is provided on the support plate 8, and a limiting notch 32 corresponding to the extension block 81 is opened on the PCB board 3, and the extension block 81 is inserted into the corresponding limiting notch 32, and the limiting notch 32 is adapted to the shape of the extension block 81.

[0036] Preferably, the rotating seat assembly 4 includes a rotating seat upper cover 41, a rotating seat lower cover 42 and a fixed ring 43, the fixed ring 43 includes an inner ring 431 and an outer ring 432 arranged on the inner ring 431, the outer diameter of the outer ring 432 is larger than the outer diameter of the inner ring 431, the inner ring 431 is inserted into the through hole 222 and plugged into the through hole 222, the inner side wall of the outer ring 432 is in contact with the inner surface of the fake package lower cover 22; the outer surface of the rotating seat lower cover 42 is in contact with the outer surface of the fake package lower cover 22, and further includes a second fastener 71, the inner ring 431 is detachably arranged on the rotating seat lower cover 42 by the second fastener 71, and the rotating seat assembly 4 rotates around the through hole 222;

[0037] The shift member 5 includes a steel ball 51 and a return spring 52. A movable groove 421 is opened on the side of the rotating seat lower cover 42 facing the shift slot 20. The steel ball 51 and the return spring 52 are inserted into the movable groove 421. The return spring 52 pushes the end of the steel ball 51 to protrude from the movable groove 421. The shift slot 20 is hemispherical. The steel ball 51 is inserted into the shift slot 20 or withdrawn from the shift slot 20 as the rotating seat assembly 4 rotates.

[0038] Preferably, a positioning groove 224 coaxially arranged with the through hole 222 is provided on the fake bag lower cover 22, and the gear groove 20 is circumferentially distributed in the positioning groove 224; a protrusion 422 is provided on the rotating seat lower cover 42, and the inner diameter of the positioning groove 224 is adapted to the outer diameter of the protrusion 422, and the protrusion 422 is inserted into the positioning groove 224 and plug-fitted, and the fixing ring 43 is detachably arranged on the protrusion 422 through the second fastener 71.

[0039] Preferably, a first limit block 9 is provided on the inner surface of the fake package lower cover 22, and a second limit block 91 is provided on the outer ring 432. The first limit block 9 is located on the rotation path of the second limit block 91, and the first limit block 9 is against or separated from the second limit block 91.

[0040] Specifically, such as Figure 3-Figure 6As shown, two fixing columns are integrally formed on the inner side of the fixing ring 43 . The fixing columns extend along the height direction of the fixing ring 43 . A first insertion hole is formed on the fixing columns, and a second insertion hole is formed on the lower cover 42 of the rotating seat.

[0041] When fixing the rotating seat assembly 4 on the fake package lower cover 22, first place the fixing ring 43 on the inner side of the fake package lower cover 22, then insert the inner ring 431 into the through hole 222 and make the first limit block 9 and the second limit block 91 abut each other, then insert the protrusion 422 into the positioning groove 224, and rotate the rotating seat lower cover 42 to make the first insertion hole and the second insertion hole face each other, then pass the second fastener 71 through the second insertion hole and tighten it in the first insertion hole. At this time, the rotating seat lower cover 42 and the fixing ring 43 can be fixed on the fake package lower cover 22.

[0042] An outer wiring harness half groove is provided on the rotating seat upper cover 41, and an inner wiring harness half groove is provided on the rotating seat lower cover 42. When fixing the rotating seat upper cover 41 to the rotating seat lower cover 42, first pass the end of the conductive wiring harness 1 or the male plug wiring harness 11 through the inner wiring harness half groove and the through hole 222, and then cover the rotating seat lower cover 42 on the rotating seat upper cover 41 and make the outer wiring harness half groove face the inner wiring harness half groove, and then fix the rotating seat upper cover 41 to the rotating seat lower cover 42 by screws. At this time, the assembly of the rotating seat upper cover 41 and the rotating seat lower cover 42 is completed.

[0043] like Figure 3 、 Figure 4 As shown, the inner surface of the dummy package lower cover 22 is integrally formed with two support plates 8, positioned to the left and right of the through-hole 222. Four mounting posts 223 are provided, located at either end of the support plates 8. An extension block 81 is integrally formed on the support plates 8, protruding away from the dummy package lower cover. The PCB 3 is provided with retaining notches 32 corresponding to the extension blocks 81, and the retaining notches 32 are shaped to match the extension blocks 81.

[0044] When there is only one interface body 6 , the tail end of the male plug harness 11 is integrally formed at one end of the conductive harness 1 . When there are multiple interface bodies 6 , the male plug harness 11 and the conductive harness 1 are separated from each other.

[0045] When assembling the innovative device interface structure with multiple interface bodies 6, first fix the PCB board 3 on the fake package lower cover 22, then weld the two ends of the conductive wire harness 1 passing through the through hole 222 to the adjacent PCB boards 3 respectively, and weld the tail end of the male plug wire harness 11 passing through the through hole 222 to one of the PCB boards 3, then align the limiting notches 32 with their respective corresponding extension blocks 81, and move the PCB board 3 toward the support plate 8 until the extension block 81 is inserted into the limiting notch 32. At this time, the PCB board 3 is abutted against the support plate 8, and the mounting holes 31 are aligned with their respective corresponding mounting columns 223. Then, pass the first fastener 7 through the mounting hole 31 and tighten it into the mounting column 223 to fix the PCB board 3 on the fake package lower cover 22.

[0046] When assembling the fake package shell assembly 2, first pass the upper part of the battery button 23 through the button slot 211, then put the release spring 24 into the plug-in tube 221, and finally align the fake package upper cover 21 with the fake package lower cover 22 and tighten them with screws.

[0047] When the machine needs to be powered, an innovative device interface structure having a single interface body 6 or multiple interface bodies 6 can be carried to power the machine.

[0048] During installation, first plug the head end of the male plug harness 11 into a power source such as a battery, then rotate the rotating seat assembly 4 to a suitable angle, and snap the interface body 6 onto the machine through the snap groove 231, so as to control the operation of the corresponding PCB board 3 on the interface body 6 according to the voltage requirements of the current machine, thereby being able to provide suitable voltage to power different machines, making it convenient to use.

[0049] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. An innovative structure of a multifunctional device interface for outdoor power supply, comprising a conductive harness (1), characterized in that: The invention also includes a dummy shell component (2), a PCB board (3) and a rotating seat component (4), wherein the PCB board (3) is arranged in the dummy shell component (2), the rotating seat component (4) is rotatably arranged on the dummy shell component (2), a plurality of gear slots (20) are provided on the dummy shell component (2), a gear member (5) is movably arranged on the rotating seat component (4), and the gear member (5) is inserted into the gear slot (20) or withdrawn from the gear slot (20) as the rotating seat component (4) rotates; the tail end of the conductive wire harness (1) is inserted into the dummy shell component (2) and electrically connected to the dummy PCB board (3), the head end of the conductive wire harness (1) passes through the rotating seat component (4), the head end of the conductive wire harness (1) is electrically connected to a male plug wire harness (11), and the male plug wire harness (11) is electrically connected to a power supply.

2. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 1, characterized in that: The conductive wire harness (1), the dummy housing assembly (2), the PCB board (3), the rotating seat assembly (4) and the shift member (5) constitute an interface body (6), and the number of the interface bodies (6) is multiple. The tail end of the male plug harness (11) is electrically connected to one of the PCB boards (3), and the head end of the male plug harness (11) is electrically connected to a power source. Adjacent PCB boards (3) are electrically connected via the conductive wire harness (1).

3. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 2, characterized in that: The dummy package shell assembly (2) comprises a dummy package upper cover (21), a dummy package lower cover (22), a battery button (23) and a release spring (24); the dummy package lower cover (22) is provided with a plug-in tube (221), the dummy package upper cover (21) is provided with a button slot (211), and the upper portion of the battery button (23) is provided with a buckle slot (231); one end of the release spring (24) is inserted into the plug-in tube (221), and the other end of the release spring (24) is against the battery button (23); the release spring (24) pushes the battery button (23) to contact the inner surface of the dummy package upper cover (21), and the upper portion of the battery button (23) passes through the button slot (211).

4. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 3, characterized in that: The dummy package lower cover (22) is provided with a through hole (222), and the inner surface of the dummy package lower cover (22) is provided with a mounting post (223) located outside the through hole (222). The PCB board (3) is provided with a mounting hole (31) and further includes a first fastener (7), which passes through the mounting hole (31) and is screwed into the mounting post (223). The PCB board (3) is directly opposite to the through hole (222), and the end of the conductive wire harness (1) passes through the through hole (222) and is electrically connected to the PCB board (3).

5. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 4, characterized in that: The inner surface of the dummy package lower cover (22) is provided with a support plate (8), the support plate (8) is symmetrically arranged on both sides of the through hole (222), and the mounting column (223) is arranged on the support plate (8); the support plate (8) is provided with an extension block (81) protruding in a direction away from the dummy package lower cover (22), and the PCB board (3) is provided with a limiting notch (32) corresponding to the extension block (81), and the extension block (81) is inserted into the corresponding limiting notch (32), and the limiting notch (32) is adapted to the shape of the extension block (81).

6. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 4, characterized in that: The rotating seat assembly (4) includes a rotating seat upper cover (41), a rotating seat lower cover (42) and a fixed ring (43), the fixed ring (43) includes an inner ring (431) and an outer ring (432) arranged on the inner ring (431), the outer diameter of the outer ring (432) is larger than the outer diameter of the inner ring (431), the inner ring (431) is inserted into the through hole (222) and is plugged into the through hole (222), the inner side wall of the outer ring (432) is in contact with the inner surface of the false package lower cover (22); the outer surface of the rotating seat lower cover (42) is in contact with the outer surface of the false package lower cover (22), and the rotating seat assembly (4) also includes a second fastener (71), the inner ring (431) is detachably arranged on the rotating seat lower cover (42) through the second fastener (71), and the rotating seat assembly (4) rotates around the through hole (222); The shift member (5) includes a steel ball (51) and a return spring (52). A movable groove (421) is provided on a side of the rotary seat lower cover (42) facing the shift groove (20). The steel ball (51) and the return spring (52) are inserted into the movable groove (421). The return spring (52) pushes the end of the steel ball (51) to protrude from the movable groove (421). The shift groove (20) is hemispherical. The steel ball (51) is inserted into the shift groove (20) or withdraws from the shift groove (20) as the rotary seat assembly (4) rotates.

7. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 6, characterized in that: The fake bag lower cover (22) is provided with a positioning groove (224) coaxially arranged with the through hole (222), and the gear groove (20) is circumferentially distributed in the positioning groove (224); the rotating seat lower cover (42) is provided with a protrusion (422), the inner diameter of the positioning groove (224) is adapted to the outer diameter of the protrusion (422), the protrusion (422) is inserted into the positioning groove (224) and plug-fitted, and the fixing ring (43) is detachably arranged on the protrusion (422) through a second fastener (71).

8. The innovative structure of a multifunctional device interface for outdoor power supply according to claim 6, characterized in that: A first limiting block (9) is provided on the inner surface of the fake package lower cover (22), and a second limiting block (91) is provided on the outer ring (432). The first limiting block (9) is located on the rotation path of the second limiting block (91), and the first limiting block (9) and the second limiting block (91) are opposed to or separated from each other.

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