Battery pack

Abstract

The battery pack comprises a shell and a cover body, an opening is formed in one end of the shell, at least one first window is formed in the side wall of the opening, the cover body is detachably fixed to the opening of the shell, a cavity used for containing a battery is defined by the cover body and the shell, and the cover body comprises a spring bolt, a main body part and a button arranged on the main body part. The spring bolt is connected to the button through the connecting arm, a second inclined face is arranged on the side, facing the shell, of the spring bolt, the button drives the spring bolt to move in the opening direction of the first window, and the shell comprises a blocking wall and the first window formed in the blocking wall. The projection of the second slope on the bottom surface of the battery pack intersects with the projection of the inner side wall of the retaining wall on the bottom surface of the battery pack. According to the utility model, after the button is pressed to the bottom, the cover body is rotated by a certain angle, so that the cover body can be detached from the shell, the situation that the cover body is detached by mistake when the battery pack is detached, and a battery in the battery pack slides off is avoided, and the stability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, specifically relating to an improved battery pack. Background Technology

[0002] Many existing power tools use external battery packs to replace traditional corded systems, improving portability. Battery packs are consumables and need to be returned to the factory for repair if they malfunction. This requires disassembling the battery pack casing, which is currently quite cumbersome to install and remove in most cases.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an improved battery pack to solve the problem of cumbersome disassembly and assembly.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a battery pack, including a housing and a cover. One end of the housing is open, and at least one first window is provided on the side wall of the opening. The cover is detachably fixed to the opening of the housing and forms a cavity for placing a battery between the cover and the housing. The cover includes a latch, a main body, a button provided on the main body, and an elastic connecting arm. The latch is connected to the button through the connecting arm. The latch has a second inclined surface facing the housing. The button drives the latch to move along the opening direction of the first window. The housing includes a baffle and a first window disposed on the baffle. The button can be selectively driven to a maintenance state. In the maintenance state, the projection of the second inclined surface on the bottom surface of the battery pack intersects with the projection of the inner side wall of the baffle on the bottom surface of the battery pack.

[0006] In one or more embodiments of this utility model, when the button drives the latch to move within the first window, the latch always abuts against the side wall of the first window.

[0007] In one or more embodiments of this utility model, the sidewall is provided with a first inclined surface facing the cover side and a first guide surface connected to the first inclined surface, the included angle between the first inclined surface and the first guide surface being greater than 180°, and / or the latch is provided with a second guide surface connected to the second inclined surface, the included angle between the second inclined surface and the second guide surface being greater than 180°.

[0008] In one or more embodiments of this utility model, a return spring is pressed between the button and the inner wall of the main body.

[0009] In one or more embodiments of the present invention, the button includes a pressing part and a limiting rod connected to the pressing part and extending into the main body, the reset spring is sleeved outside the limiting rod, and the locking tongue is connected to the pressing part through a connecting arm.

[0010] In one or more embodiments of the present invention, the connecting arm is perpendicular to the pressing part and the locking tongue, and forms a clamping groove between the pressing part and the locking tongue for accommodating the side wall, and the connecting arm is provided with a third inclined surface that cooperates with the first inclined surface on the side facing the baffle.

[0011] In one or more embodiments of the present invention, at least one screw facing the housing is provided on the inner wall of the cover, and the housing is provided with a positioning hole for receiving the screw.

[0012] In one or more embodiments of the present invention, the outer walls of the housing and the cover are further provided with a matching snap-fit ​​structure, the snap-fit ​​structure including a second window opened on the top of the housing and a protrusion provided on the cover for embedding in the second window.

[0013] In one or more embodiments of the present invention, the bump includes a fourth inclined surface facing one side of the housing.

[0014] In one or more embodiments of the present invention, the protrusion further includes a fifth inclined surface facing away from the housing.

[0015] Compared with the prior art, in the battery pack of this utility model, the button needs to be pressed all the way down and the cover needs to be rotated at a certain angle to remove the cover from the shell. This avoids the situation where the cover is accidentally removed when disassembling the battery pack, causing the battery inside the pack to slip out, thus improving stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a battery pack in one embodiment of the present invention;

[0018] Figure 2 This is a disassembly and assembly diagram of the battery pack in one embodiment of the present invention;

[0019] Figure 3This is a cross-sectional view of the battery pack when the latch is fully embedded in the first window in one embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional view of the battery pack when the latch is not fully embedded in the first window in one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the cover being rotated in one embodiment of the present invention;

[0022] Figure 6 for Figure 1 A magnified view of a portion of point A in the middle.

[0023] Explanation of key figure labels:

[0024] 100-Battery pack, 10-Housing shell, 11-First window, 12-Baffle, 13-First slope, 14-First guide surface, 15-Positioning hole, 16-Second window, 17-Side wall, 20-Cover, 21-Lock tongue, 211-Second slope, 212-Second guide surface, 22-Main body, 221-Slot, 23-Button, 231-Pressing part, 232-Limiting rod, 24-Reset spring, 25-Connecting arm, 251-Third slope, 26-Screw, 27-Protrusion, 271-Fourth slope, 272-Fifth slope. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0026] like Figure 1-4As shown, in one embodiment of the present invention, the battery pack 100 includes a housing 10 and a cover 20. One end of the housing 10 is open, and at least one first window 11 is provided on the side wall of the opening. The cover 20 is detachably fixed to the opening of the housing 10. When the cover 20 is fixed to the housing 10, the two form a cavity for placing the battery cell. The cover 20 includes a latch 21, a main body 22, and a button 23 provided on the main body 22. The latch 21 is connected to the button 23. The button 23 drives the latch 21 to move along the opening direction of the first window 11. After the battery is inserted into the housing 10, the latch 21 is engaged with the first window 11 to fix the cover 20 to the housing 10, forming a relatively enclosed space to protect the battery cell. The housing 10 includes a baffle 12 provided on the side of the first window 11 near the internal cavity, and a second inclined surface 211 is provided on the side of the latch 21 facing the housing 10. The button 23 can be selectively driven to the maintenance state (button 23 is pressed all the way down). At this time, the projection of the second inclined surface 211 on the bottom surface of the battery pack 100 intersects with the projection of the inner sidewall of the baffle 12 on the bottom surface of the battery pack. That is, when the latch 21 is located inside the first window 11, even if the button 23 is pressed all the way down, the latch 21 is not completely disengaged from the first window 11. Therefore, the button 23 and the latch 21 are connected by an elastic connecting arm 25. When pulling out the cover 20, after pressing the button 23 all the way down, the cover 20 needs to be rotated at a certain angle (e.g., Figure 5 As shown in the diagram, during this process, the connecting arm 25 undergoes a certain degree of deformation, and the second inclined surface 211 moves outward against the edge of the baffle 12, causing the locking tongue 21 to slide out and disengage from the first window 11, thus releasing the cover 20 from the housing 10. This design adds a rotational action to the removal of the cover 20, making it impossible to directly pull the cover 20 outward by simply pressing the button 23. Therefore, it avoids the situation where the cover 20 is accidentally removed when disassembling the battery pack 100 from the tool, resulting in the internal battery detaching, thus improving the overall stability.

[0027] In one embodiment, when button 23 drives the latch 21 to move within the first window 11, the latch 21 always abuts against the side wall 17 of the first window 11 near the cover 20, so that the cover 20 can only be removed from the housing 10 by pressing button 23 and rotating it.

[0028] In one embodiment, a first inclined surface 13 is provided on the side wall 17. By providing the first inclined surface 13 on the side wall 17, and cooperating with the second inclined surface 211 on the latch 21, the double inclined surface arrangement allows the first inclined surface 13 and the second inclined surface 211 to contact each other first when the cover 20 is closed to the housing 10. When the cover 20 is pressed inward, the latch 21 can move to the top of the side wall 17 by itself under the action of the two inclined surfaces, and finally move to the top of the first window 11 and be dragged into the first window 11.

[0029] Preferably, in order to enable the locking tongue 21 to smoothly disengage from the first window 11, its edge does not adopt a right-angle corner, but connects two vertical surfaces with a slope, thereby reducing the resistance during rotation.

[0030] It is easy to imagine that if a slope is provided on the other side of the latch 21 and the first window 11, the contact area between the latch 21 and the side wall of the first window 11 when it is inside the first window 11 will be reduced, resulting in a decrease in the fixing effect and an increase in the risk of the cover 20 abnormally detaching from the shell 10. Therefore, a slope structure is provided only on one side of the latch 21 and the side wall 17, while no slope is provided on the other side of both, in order to ensure stability.

[0031] Preferably, a first guide surface 14 connecting the first inclined surface 13 is also provided on the side wall 17, and a second guide surface 212 connecting the second inclined surface 211 is provided on the latch 21. The included angles between the first inclined surface 13 and the first guide surface 14, and between the second inclined surface 211 and the second guide surface 212, are all greater than 180°. The arrangement of the first guide surface 14 and the second guide surface 212 makes the main contact area between the latch 21 and the side wall 17 trapezoidal. When the cover 20 is inserted into the housing 10, the first inclined surface 13 and the second inclined surface 211 first contact and generate relative displacement when the latch 21 is moved, until the main body of the latch 21 moves to the end of the side wall 17. At this time, the first guide surface 14 and the second guide surface 212 contact, and the latch 21 enters a translational movement until it moves to the end of the first guide surface 14 and falls into the first window 11 and is fixed. With this arrangement, the cover 20 can be directly inserted horizontally when fixed to the housing 10 without the need for a separate rotation operation.

[0032] The above configuration can provide a greater thickness to the latch 21 and the side wall 17 while ensuring that the contact area between the latch 21 and the side wall of the first window 11 is the same. That is, the side wall 17 and the latch 21 are larger and longer in the opening direction of the housing 10, thus having higher strength and stability. The risk of the latch 21 and / or the baffle 12 breaking when the cover 20 is forcibly pried outward is smaller.

[0033] Preferably, a return spring 24 is pressed between the button 23 and the inner wall of the main body 22. When the button 23 is pressed inward, the return spring 24 is deformed by the compression and stores energy. When the latch 21 moves above the first window 11, the button 23 is released. The return spring 24 loses the compressive force, restores its deformation, releases the stored energy, and pushes the button 23 outward, causing the latch 21 to fall into the first window 11 and finally complete the fixing.

[0034] Preferably, to ensure that the reset spring 24 deforms only along its own axial direction, the button 23 includes a pressing part 231 and a limiting rod 232 connected to the pressing part 231. The limiting rod 232 extends into the main body 22, the reset spring 24 is sleeved on the limiting rod 232, and the locking tongue 21 is connected to the pressing part 231 through the connecting arm 25.

[0035] Furthermore, to ensure the stability of button 23 and to ensure that button 23 moves only in the inward and outward directions of cover 20 and not in other directions, a mechanism is provided on the inner wall of the main body 22 to restrict the movement direction of pressing part 231 and limiting rod 232, for example in... Figure 2 and 4 In this design, a slot 221 is provided on the inner wall of the main body 22, and the limiting rod 232 is locked in the slot 221. At the same time, a guide structure can be provided on the inner wall of the main body 22 for the pressing part 231. For example, a guide groove (not shown) can be provided on the inner wall of the main body 22, and a guide rail (not shown) embedded in the guide groove can be provided on the pressing part 231 to improve the overall stability of the button 23.

[0036] like Figure 3 , 4 As shown, the connecting arm 25 is perpendicular to the surface of the pressing part 231, and the locking tongue 21 can also be a protrusion structure perpendicular to the connecting arm 25. Therefore, a clamping groove is formed between the locking tongue 21, the connecting arm 25, and the pressing part 231. The width of the clamping groove (the distance between the locking tongue 21 and the connecting arm 25) is the same as the width of the baffle wall 12 (the length in the opening direction of the housing 10), so that after the locking tongue 21 is engaged in the first window 11, the side wall 17 falls between the locking tongue 21 and the connecting arm 25, resulting in high stability. Furthermore, a third inclined surface 251 that cooperates with the first inclined surface 13 is provided on the side of the connecting arm 25 facing the baffle wall 12. When the side wall 17 is completely engaged in the clamping groove, the first inclined surface 13 and the third inclined surface 251 fit together, thus reducing the gap between the side wall 17 and the connecting arm 25.

[0037] In other preferred embodiments, the connecting arm 25 can be configured to fit completely against the sidewall 17, thereby completely eliminating the gap between the two and further improving stability.

[0038] In one embodiment, a screw 26 is provided on the inner wall of the cover 20, and correspondingly, a positioning hole 15 for accommodating the screw 26 is provided on the inner wall of the housing 10, thereby improving the fixing effect between the cover 20 and the housing 10. For example Figure 2 In this embodiment, three positioning holes 15 are provided in the lower half of the housing 10, and a first window 11 is provided in the upper half of the housing 10. The two work together to fix the housing 10 and the cover 20. Of course, the number of positioning holes 15 and screws 26 can be set to other numbers, and this embodiment is not limited.

[0039] Furthermore, the outer walls of the housing 10 and the cover 20 are also provided with matching snap-fit ​​structures, for example... Figure 2 In this embodiment, a second window 16 is provided on the top of the housing 10, and a corresponding protrusion 27 is provided on the top of the cover 20. When the cover 20 is inserted into the housing 10, the protrusion 27 is embedded in the second window 16, thereby further improving stability and preventing the two from separating. When the cover 20 is rotated, the locking tongue 21 disengages from the first window 11, and the protrusion 27 disengages from the second window 16, and then the cover 20 is pulled outward. The specific number of protrusions 27 and the second window 16 can be determined according to the contact area between the top of the cover 20 and the top of the housing 10, and this embodiment is not limited.

[0040] Preferably, since the cover 20 is inserted horizontally without the need for rotation, an inclined fourth slope 271 is provided on the side of the protrusion 27 facing the housing 10, so that the cover 20 can be inserted more smoothly into the second window 16.

[0041] Furthermore, an inclined fifth slope 272 is provided on the side of the protrusion 27 facing away from the housing 10, thereby enabling the cover 20 to be rotated and pulled out more smoothly.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery pack, characterized in that, include: A housing (10) with an opening at one end, wherein the housing (10) has at least one first window (11) on the side wall at the opening; and The cover (20) is detachably fixed to the opening of the housing (10) and forms a cavity for placing batteries with the housing (10). The cover (20) includes a latch (21), a main body (22), a button (23) provided on the main body (22), and a flexible connecting arm (25). The latch (21) is connected to the button (23) through the connecting arm (25). The latch (21) is provided with a second inclined surface (211) on the side facing the housing (10). The button (23) drives the latch (21) to move along the opening direction of the first window (11). The housing (10) includes a baffle (12) and a first window (11) disposed on the baffle (12). The button (23) can be selectively driven to a maintenance state. In the maintenance state, the projection of the second inclined surface (211) on the bottom surface of the battery pack intersects with the projection of the inner sidewall of the baffle (12) on the bottom surface of the battery pack.

2. The battery pack according to claim 1, characterized in that, When the button (23) drives the latch (21) to move within the first window (11), the latch (21) always abuts against the side wall (17) of the first window (11) near the cover (20).

3. The battery pack according to claim 2, characterized in that, The sidewall (17) is provided with a first inclined surface (13) facing the cover (20) and a first guide surface (14) connected to the first inclined surface (13), wherein the included angle between the first inclined surface (13) and the first guide surface (14) is greater than 180°, and / or The latch (21) is provided with a second guide surface (212) that connects to the second inclined surface (211), and the included angle between the second inclined surface (211) and the second guide surface (212) is greater than 180°.

4. The battery pack according to claim 3, characterized in that, A return spring (24) is pressed between the button (23) and the inner wall of the main body (22).

5. The battery pack according to claim 4, characterized in that, The button (23) includes a pressing part (231) and a limiting rod (232) connected to the pressing part (231) and extending into the main body (22). The reset spring (24) is sleeved on the limiting rod (232). The locking tongue (21) is connected to the pressing part (231) through a connecting arm (25).

6. The battery pack according to claim 5, characterized in that, The connecting arm (25) is perpendicular to the pressing part (231) and the locking tongue (21), and forms a clamping groove between the pressing part (231) and the locking tongue (21) to accommodate the side wall (17). The connecting arm (25) is provided with a third inclined surface (251) on the side facing the baffle (12) that cooperates with the first inclined surface (13).

7. The battery pack according to claim 1, characterized in that, At least one screw (26) facing the housing (10) is provided on the inner wall of the cover (20), and the housing (10) is provided with a positioning hole (15) for accommodating the screw (26).

8. The battery pack according to claim 1, characterized in that, The outer walls of the housing (10) and the cover (20) are also provided with a matching snap-fit ​​structure. The snap-fit ​​structure includes a second window (16) opened on the top of the housing (10) and a protrusion (27) provided on the cover (20) for embedding into the second window (16).

9. The battery pack according to claim 8, characterized in that, The bump (27) includes a fourth bevel facing the housing (10).

10. The battery pack according to claim 9, characterized in that, The bump (27) also includes a fifth inclined surface that is away from the housing (10).

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