Battery cover and infrared gunsight device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI YINGJU INNOVATION TECHNOLOGY CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-03
AI Technical Summary
传统红外枪瞄设备的电池为内置式，但在长时间使用后需要充电时，内置电池的方式在户外充电较为不便，因此部分红外枪瞄设备会将电池设置为外置式，通过电池盖将电池固定在电池仓中
Smart Images
Figure CN224458445U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery cover technology, and in particular to a battery cover and an infrared gun aiming device. Background Technology
[0002] Infrared gun sights are devices that use infrared technology for aiming, primarily providing accurate aiming capabilities at night or in low-light environments. Traditional infrared gun sights have built-in batteries, but charging them outdoors after extended use is inconvenient. Therefore, some infrared gun sights use external batteries, secured in the battery compartment by a battery cover.
[0003] However, existing battery covers are usually detachable from the battery compartment using screws. The screws are cumbersome to install and remove and require special tools such as screwdrivers, which makes it impossible to open the battery compartment quickly and affects the efficiency of battery replacement.
[0004] Therefore, in view of the above-mentioned technical problems, how to provide a battery cover that can be quickly opened is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0005] The purpose of this application is to provide a battery cover and an infrared gun sight that enables the battery compartment to be opened quickly.
[0006] To achieve the above objectives, this application provides a battery cover, comprising:
[0007] Including the cover located on the side of the battery compartment opening;
[0008] The movable part is movably disposed on the outside of the cover, including a movable cover that moves along a first direction and a locking block disposed on the movable cover. The locking block disengages from and engages with the battery compartment at a preset position on the movement path along the first direction.
[0009] The pressing part is movably disposed on the movable cover and exposed relative to it. In a first position, the pressing part is engaged with the cover in the first direction; in a second position, the pressing part is disengaged from the cover in the first direction.
[0010] Preferably, the pressing part includes a pressing button that moves relative to the movable cover in the pressing direction and a snap-fit component that moves synchronously with the pressing button;
[0011] The cover has a limiting groove that opens toward the snap-fit member. The snap-fit member extends into the limiting groove to prevent it from detaching from the cover. The limiting groove includes a first groove for the snap-fit member to move along the pressing direction and a second groove for the snap-fit member to move along the first direction. The first groove and the second groove are connected.
[0012] Preferably, the cover has a notch for placing the movable part, the cover includes a side rib provided at the notch, and the limiting groove is formed on the side rib.
[0013] Preferably, the snap-fit component moves between the two side ribs, the side ribs extend along the first direction, the limiting groove is formed on the opposite surface of the two side ribs, and in the first direction, the rear side of the second groove is provided with an opening for the snap-fit component to disengage from the second groove.
[0014] Preferably, the two side ribs are provided with guide ribs extending along the first direction on opposite sides, the movable cover covers the outer sides of the two side ribs on both sides, and a guide groove that cooperates with the guide ribs is provided on the inner wall of the position covered by the movable cover.
[0015] Preferably, the movable cover has a through hole, the pressing key is movably disposed in the through hole, and the first end of the pressing key extends through the through hole into the movable cover, and the outer edge of the first end interferes with the inner ring of the through hole in the pressing direction.
[0016] Preferably, the pressing part further includes a spring sheet fixed to the first end, and a movement space is reserved between the spring sheet and the cover for the pressing part to move along the pressing direction, and the snap-fit member is provided on the spring sheet.
[0017] Preferably, the end of the spring extends beyond the press button and has a guide hole in the extended portion. The movable cover has a guide post that passes through the guide hole. The end of the guide post away from the movable cover has a fixing piece. A spring is provided on the outer periphery of the guide post. One end of the spring abuts against the fixing piece, and the other end of the spring abuts against the spring on the outer periphery of the guide hole. The end of the spring away from the guide hole is movably disposed relative to the movable cover.
[0018] Preferably, the movable cover is disposed on one side of the cover body, and the other side of the cover body is rotatably connected to the battery compartment via a pivot.
[0019] An infrared gun aiming device, comprising:
[0020] The device body has a battery compartment, and a slot is provided on the outer wall of the opening side of the battery compartment.
[0021] The battery cover is the battery cover described above. The battery cover is located on the opening side of the battery compartment. In a first state, the locking block of the battery cover enters the slot in a direction opposite to the first direction and engages with the slot. In a second state, the locking block moves in the first direction to a preset position where it disengages from the slot.
[0022] Compared to the aforementioned background technology, this application restricts the movement of the movable part by using a pressing part. When the pressing part is in the first position, the pressing part is engaged with the cover in the first direction, and the movable part cannot move in the first direction, so the battery compartment cannot be opened. However, when it is necessary to open the battery compartment, the pressing part is pressed to the second position, and the pressing part is disengaged from the cover in the first direction. At this time, the movable part can move in the first direction. When the locking block on the movable part moves to the preset position, it can disengage from the battery compartment, thereby realizing the rapid opening of the battery compartment. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the device body and battery cover mating structure provided in an embodiment of this application;
[0025] Figure 2 This is a schematic diagram of the exploded structure of the battery cover provided in an embodiment of this application;
[0026] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;
[0027] Figure 4 This is a schematic diagram of the spring structure provided in the embodiments of this application;
[0028] Figure 5 This is a partial cross-sectional view of the battery cover provided in an embodiment of this application;
[0029] Figure 6 This is a cross-sectional view of the battery cover provided in an embodiment of this application.
[0030] In the diagram: 1-Cover; 2-Moving part; 3-Pressing part; 4-Spring; 5-Fixing plate; 6-Equipment body; 7-Rotating shaft;
[0031] 11-Limiting groove; 12-Side rib; 13-Guide rib; 111-First groove; 112-Second groove;
[0032] 21-Card block; 22-Modible cover; 23-Through hole; 24-Guide post; 25-Guide groove;
[0033] 31-Press button; 32-Spring; 321-Snap-fit component; 322-Guide hole;
[0034] 61-Card slot. Detailed Implementation
[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0036] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0037] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0038] like Figure 1 and Figure 2 As shown, in this embodiment, a battery cover is provided. The battery cover includes a cover body 1 disposed on the opening side of the battery compartment. The cooperation between the cover body 1 and the battery compartment allows the battery inside the battery compartment to be stably positioned, thereby providing stable power. The battery cover also includes a movable part 2 and a pressing part 3. The movable part 2 is movably disposed on the outside of the cover body 1. The movable part 2 includes a movable cover 22 that moves relative to the cover body 1. Specifically, the movable part 2 can be driven to move along a first direction by manual pushing. The first direction can be the length direction of the cover body 1; of course, the first direction can also be the width direction of the cover body 1, etc., without much limitation, all of which are within the protection scope of this application.
[0039] The movable part 2 also includes a locking block 21 disposed on the movable cover 22. The locking block 21 can move with the movable cover 22, and thus, under the action of the movable cover 22, the locking block 21 can also move along the first direction. Furthermore, there is a preset position along the movement path in the first direction where the locking block 21 disengages from the battery compartment. It should be noted that the function of the locking block 21 is to enable the movable part 2 to engage with the battery compartment, preventing the movable part 2 from disengaging from the battery compartment, thereby preventing the cover 1 from disengaging from the battery compartment. This ensures that the battery cover of this application is stably engaged with the battery compartment, maintaining the stability of the battery within the battery compartment. Since the locking block 21 can disengage from the battery compartment by moving along the first direction, correspondingly, the locking block 21 can engage with the battery compartment by moving in the opposite direction. That is, the movement of the movable part 2 is bidirectional; it can move along the first direction or in the opposite direction.
[0040] The pressing part 3 is provided on the movable cover 22 and exposed relative to the movable cover 22. The pressing part 3 can be moved relative to the movable cover 22 by manual pressing. At the same time, the pressing part 3 can also move with the movable part 2. That is, when the movable part 2 moves along the first direction, the pressing part 3 can also be driven to move along the first direction. Similarly, the pressing part 3 can also be driven to move in the opposite direction to the first direction.
[0041] When the pressing part 3 is in the first position, it engages with the cover 1 in the first direction, preventing the cover 1 from moving in the first direction. Therefore, the locking block 21 cannot reach the preset position where it is disengaged from the battery compartment. When the pressing part 3 is in the second position, it disengages from the cover 1 in the first direction. At this time, the movable part 2 can move in the first direction. When the locking block 21 on the movable part 2 moves to the preset position, it disengages from the battery compartment, thus enabling the battery compartment to open quickly. It should be noted that the switching between the first and second positions can be achieved by pressing.
[0042] Furthermore, the pressing part 3 includes a pressing button 31 that moves relative to the movable cover 22 in the pressing direction and a latching member 321 that operates synchronously with the pressing button 31. Please refer to [reference needed]. Figure 2 The pressing direction and the first direction are two different directions. The movement of the pressing part 3 in the pressing direction is to make the snap fastener 321 move accordingly. After the snap fastener 321 reaches a certain position, it can move along the first direction with the moving part 2.
[0043] Please refer to Figure 2The cover 1 is provided with a limiting groove 11 that opens toward the snap fastener 321. The snap fastener 321 can be inserted into the limiting groove 11. The interference of the groove wall of the limiting groove 11 on the snap fastener 321 prevents the snap fastener 321 from detaching from the limiting groove 11 in any direction other than the first direction. This allows the snap fastener 321 to have a stable movement effect in the limiting groove 11, preventing the snap fastener 321 from accidentally detaching from the limiting groove 11 and causing the pressing part 3 to jam with the cover 1.
[0044] The limiting groove 11 includes a first groove 111 for the card feeder 321 to move in the pressing direction and a second groove 112 for the card feeder 321 to move in the first direction. Please refer to [reference needed]. Figure 3 The first groove 111 is connected to the second groove 112. The latching member 321 can move from the first groove 111 to the second groove 112, or from the second groove 112 to the first groove 111. When the latching member 321 is in the first groove 111, due to the restriction of the groove wall of the first groove 111, the latching member 321 will only move in the pressing direction. At this time, the movable part 2 will be restricted from moving in the first direction, and the latching block 21 cannot be disengaged from the battery compartment at the preset position. As the pressing part 3 continues to press, the position of the latching member 321 in the first groove 111 will gradually reach the position corresponding to the position of the second groove 112. At this time, the latching member 321 can be driven by the external force of the movable part 2 under the action of the second groove 112, so that the latching member 321 moves in the first direction in the second groove 112, and then the movable part 2 and the pressing part 3 move in the first direction as a whole, so that the latching block 21 can be disengaged from the battery compartment at the preset position.
[0045] In summary, this application provides a limiting groove 11 on the cover 1 of the battery cover. The snap-fit member 321 in the pressing part 3 can cooperate with the limiting groove 11 to prevent the pressing part 3 and the movable part 2 from disengaging from the cover 1. At the same time, the pressing button 31 can drive the snap-fit member 321 to move, so that the snap-fit member 321 moves in the first groove 111 to the position corresponding to the second groove 112. Since the snap-fit member 321 can move in the second groove 112 along the first direction, when the snap-fit member 321 enters the second groove 112, the movable part 2 can move in the first direction, so that the snap-fit block 21 moves in the first direction to the preset position and disengages from the battery compartment, thereby realizing the quick opening of the battery compartment.
[0046] Please refer to Figure 2 To ensure the overall aesthetics of the battery cover, a notch for housing the movable part 2 can be provided on the cover body 1. The outer contour of the movable part 2 can be adapted to the outer contour of the notch on the cover body 1, thereby forming a smooth and complete battery cover structure. A side rib 12 protruding towards the movable part 2 is provided at the notch on the cover body 1, and a limiting groove 11 is formed on the side rib 12. Specifically, the limiting groove 11 is formed on the side of the side rib 12 facing the snap-fit member 321.
[0047] The side ribs 12 can also provide a certain guiding function for the movable part 2. For example, if the side ribs 12 extend along the first direction, the side of the movable cover 22 facing the notch of the cover body 1 can cooperate with the side ribs 12, so that the movable part 2 can slide stably along the first direction.
[0048] Furthermore, the number of side ribs 12 can be set to two, with the two side ribs 12 symmetrically distributed on both sides of the notch of the cover body 1, and the snap fastener 321 moving between the two side ribs 12. It should be noted that the movement of the snap fastener 321 between the two side ribs 12 is not a movement toward one of the side ribs 12, but rather a movement of the snap fastener 321 toward or away from the reference plane, with the plane where the line connecting the two side ribs 12 is located as the reference plane.
[0049] Based on this, the corresponding limiting groove 11 should be set on the opposite surface of the two side ribs 12, so as to correspond one-to-one with the two snap-fit pieces 321. The rear side of the second groove 112 has an opening for the snap-fit piece 321 to disengage from the second groove 112. Here, the rear side refers to the side located at the rear end along the movement path in the first direction. The snap-fit piece 321 can disengage from the limiting groove 11 through the opening of the second groove 112. When there is no limiting between the movable part 2 and the cover 1, the movable part 2 will gradually disengage from the cover 1 during subsequent movement, realizing the detachable connection between the movable cover 22 and the cover 1, facilitating maintenance and replacement. Furthermore, considering that if the movable cover 22 is completely disengaged from the cover 1, it needs to be reassembled with the cover 1 when the battery cover is used again, the snap-fit piece 321 needs to re-enter the second groove 112 through the opening. To facilitate the reassembly of the movable part 2 and the cover 1, a partially inclined surface can be provided at the end of the snap-fit piece 321. Please refer to [reference needed]. Figure 3 and Figure 4 Correspondingly, the groove wall of the second groove 112 is also provided with a partial inclined surface. The two inclined surfaces can play a certain guiding role, so that the snap-fit 321 can easily enter the second groove 112. The groove wall of the second groove 112 also has a partial flat surface, which can cooperate with the snap-fit 321 to make the snap-fit 321 move along the first direction.
[0050] Furthermore, the movement direction of the snap-fit member 321 within the second groove 112 includes a first direction and a direction opposite to the first direction, which will not be elaborated here. For details, please refer to the movement mode of the movable part 2.
[0051] The above indicates that "when there is no limiting relationship between the movable part 2 and the cover 1", then a situation where a restriction on the movement of the movable part 2 can be set on the cover 1 can also be considered. Please refer to [the relevant documentation]. Figure 2 and Figure 6Guide ribs 13 extending in the first direction are provided on the opposite sides of the two side ribs 12. The movable cover 22 can cover the outer sides of the two side ribs 12 on both sides. A guide groove 25 that cooperates with the guide ribs 13 is provided on the inner wall of the position covered by the movable cover 22, so that the movable cover 22 can only move in the first direction on the cover body 1. It should be noted that the cooperation between the guide ribs 13 and the guide grooves 25 is limited to the limiting cooperation in the first direction and does not affect the movable cover 22 from dislodging from the cover body 1 after moving a certain distance in the first direction, thereby realizing the detachable connection between the movable part 2 and the cover body 1.
[0052] The movable cover 22 has a through hole 23, and the pressing key 31 is movably disposed within the through hole 23. The opening direction of the through hole 23 is the pressing direction of the pressing key 31. The first end of the pressing key 31 passes through the through hole 23 and extends into the movable cover 22, while the second end of the pressing key 31 is exposed relative to the movable cover 22 and can be pressed manually. Due to the restriction of the pressing key 31 by the wall of the through hole 23, the pressing key 31 can also be moved when the movable part 2 moves in the first direction. A certain protrusion structure is provided on the outer edge of the first end of the pressing key 31, so that the protrusion structure interferes with the inner ring of the through hole 23 in the pressing direction, preventing the pressing key 31 from dislodging from the through hole 23 in the opposite direction to the pressing direction. It should be noted that the setting of the protrusion structure does not affect the movement of the pressing key 31 in the pressing direction.
[0053] Please refer to Figure 2 and Figure 5 The pressing part 3 also includes a spring piece 32 fixed at its first end, which can be fixed by a screw. A movement space is reserved between the spring piece 32 and the cover 1 for the pressing part 3 to move in the pressing direction. At the same time, this movement space should ensure that the second end of the pressing key 31 will not come out of the through hole 23, thus ensuring the pressing effect of the pressing part 3. A snap-fit member 321 is provided on the spring piece 32. When the pressing key 31 is pressed, the spring piece 32 and the snap-fit member 321 on the spring piece 32 can move accordingly.
[0054] In some embodiments, the end of the spring piece 32 extends beyond the press button 31, and a guide hole 322 is provided in the extended portion. Please refer to... Figure 4 and Figure 5 The movable cover 22 is provided with a guide post 24 that passes through the guide hole 322. A fixing piece 5 is provided at one end of the guide post 24 away from the movable cover 22. A spring 4 is provided on the outer periphery of the guide post 24. One end of the spring 4 abuts against the fixing piece 5, and the other end of the spring 4 abuts against the spring piece 32 on the outer periphery of the guide hole 322. The spring 4 has a certain initial compression. When the pressing button 31 is pressed down a certain distance and then released, the pressing part 3 can be reset by the elastic force of the spring 4, preparing for the next pressing.
[0055] The end of the spring piece 32 facing away from the guide hole 322 is movably disposed relative to the movable cover 22, thereby ensuring that the spring piece 32 can move as a whole. Specifically, the end of the spring piece 32 facing away from the guide hole 322 can be rotatably connected to the movable cover 22, meaning the pressing path of the pressing part 3 is arc-shaped, ensuring that the latching member 321 can move in the first groove 111 to the position corresponding to the second groove 112. Alternatively, the end of the spring piece 32 facing away from the guide hole 322 can also adopt a similar cooperation method as the guide post 24 and the guide hole 322, causing the spring piece 32 to move as a whole, with the pressing path of the corresponding pressing part 3 being straight, ensuring that the latching member 321 can move in the first groove 111 to the position corresponding to the second groove 112. These are not detailed here, but all fall within the scope of protection of this application.
[0056] In addition, to ensure the battery cover is securely fixed to the battery compartment, the movable cover 22 can be positioned on one side of the cover body 1, while the other side of the cover body 1 is rotatably connected to the battery compartment via a pivot 7. Please refer to [reference needed]. Figure 1 This ensures a stable connection between the battery cover and the battery compartment at both ends, guaranteeing the battery cover's secure hold. Alternatively, movable parts 2 can be provided on both sides of the cover 1, and the cover 1 can be engaged with both ends of the battery compartment via the two movable parts 2 and the corresponding pressing parts 3, ensuring the battery cover's secure hold.
[0057] This application also provides an infrared gun aiming device; please refer to... Figure 1 The infrared gun aiming device includes a device body 6 and a battery cover. The device body 6 has a battery compartment, and the outer wall of the battery compartment opening side has a slot 61. The battery cover is the aforementioned battery cover, which is located on the opening side of the battery compartment. In the first state, when the locking block 21 of the battery cover moves in the opposite direction to the first direction, the locking block 21 can enter the slot 61 and engage with the slot 61. At the same time, after the two are engaged, the pressing part 3 on the battery cover can engage with the cover body 1 in the first direction. That is, when the pressing part 3 is in the first position, the locking block 21 cannot be dislodged from the slot 61, thereby achieving the limiting engagement between the battery cover and the battery compartment. In the second state, when the pressing part 3 is in the second position, the locking block 21 can move in the first direction to a preset position where it is disengaged from the slot 61, thereby achieving the release of the battery cover from the battery compartment.
[0058] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0059] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.
Claims
1. A battery cover, characterized by include: A cover (1) is provided on the side of the opening of the battery compartment. The movable part (2) is movably disposed on the outside of the cover (1), including a movable cover (22) that moves along a first direction and a locking block (21) disposed on the movable cover (22). The locking block (21) disengages from the battery compartment at a preset position on the movement path along the first direction. The pressing part (3) is movably disposed on the movable cover (22) and exposed relative to it. In the first position, the pressing part (3) is engaged with the cover (1) in the first direction; in the second position, the pressing part (3) is disengaged from the cover (1) in the first direction.
2. The battery cover of claim 1, wherein, The pressing part (3) includes a pressing key (31) that moves relative to the movable cover (22) in the pressing direction and a snap-fit member (321) that moves synchronously with the pressing key (31). The cover (1) is provided with a limiting groove (11) that opens toward the snap fastener (321). The snap fastener (321) extends into the limiting groove (11) to restrict the snap fastener (321) from detaching from the cover (1). The limiting groove (11) includes a first groove (111) for the snap fastener (321) to move along the pressing direction and a second groove (112) for the snap fastener (321) to move along the first direction. The first groove (111) and the second groove (112) are connected.
3. The battery cover of claim 2, wherein, The cover (1) has a notch for placing the movable part (2), and the cover (1) includes a side rib (12) provided at the notch, and the limiting groove (11) is opened on the side rib (12).
4. The battery cover of claim 3, wherein, The snap-fit member (321) moves between the two side ribs (12), which extend along the first direction. The limiting groove (11) is opened on the opposite surface of the two side ribs (12). In the first direction, the rear side of the second groove (112) is provided with an opening for the snap-fit member (321) to disengage from the second groove (112).
5. The battery cover of claim 4, wherein, The two side ribs (12) are provided with guide ribs (13) extending along the first direction on opposite sides. The movable cover (22) covers the two side ribs (12) on both sides, and a guide groove (25) that cooperates with the guide ribs (13) is provided on the inner wall of the position covered by the movable cover (22).
6. The battery cover of claim 2, wherein, The movable cover (22) has a through hole (23), and the pressing key (31) is movably disposed in the through hole (23). The first end of the pressing key (31) extends through the through hole (23) into the movable cover (22), and the outer edge of the first end interferes with the inner ring of the through hole (23) in the pressing direction.
7. The battery cover of claim 6, wherein, The pressing part (3) further includes a spring piece (32) fixed to the first end. A movement space is reserved between the spring piece (32) and the cover (1) for the pressing part (3) to move along the pressing direction. The snap-fit member (321) is provided on the spring piece (32).
8. The battery cover of claim 7, wherein, The end of the spring piece (32) extends beyond the press button (31) and is provided with a guide hole (322) in the extended part. The movable cover (22) is provided with a guide post (24) that passes through the guide hole (322). The end of the guide post (24) away from the movable cover (22) is provided with a fixing piece (5). The outer periphery of the guide post (24) is provided with a spring (4). One end of the spring (4) abuts against the fixing piece (5), and the other end of the spring (4) abuts against the spring piece (32) on the outer periphery of the guide hole (322). The end of the spring piece (32) away from the guide hole (322) is movably set relative to the movable cover (22).
9. The battery cover of any one of claims 1-8, wherein, The movable cover (22) is located on one side of the cover body (1), and the other side of the cover body (1) is rotatably connected to the battery compartment via a rotating shaft (7).
10. An infrared gunsight device, characterized by include: The device body (6) is provided with a battery compartment, and a slot (61) is provided on the outer wall of the opening side of the battery compartment. The battery cover is the battery cover according to any one of claims 1-9. The battery cover is disposed on the opening side of the battery compartment. In a first state, the locking block (21) of the battery cover enters the locking groove (61) in a direction opposite to the first direction and engages with the locking groove (61). In a second state, the locking block (21) moves in the first direction to a preset position where it disengages from the locking groove (61).