A power tool battery pack

Abstract

The application discloses an electric tool battery pack, and relates to the technical field of electric tools, which comprises a shell, a locking piece and a reset elastic piece, the locking piece comprises a first button and a lock catch, and the battery pack further comprises a second button, a locking support piece and a locking elastic piece; the second button comprises an abutting portion for abutting against the first button inwardly, the operating direction of the first button is the same as that of the second button, the first button has a first unlocking stroke, the second button has a second unlocking stroke and an avoiding idle stroke, and the abutting portion is separated from the first button when the second button is within the second unlocking stroke; when the second button is operated to abut against the first button through the abutting portion, the second button is within the avoiding idle stroke, and when the second button continues to move within the avoiding idle stroke along the operating direction, the abutting portion abuts against the first button and drives the first button to perform the first unlocking stroke. The above scheme can effectively prevent the lock catch from being accidentally released due to vibration of the battery pack, and improve the connection reliability between the battery pack and the electric tool.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to a power tool battery pack. Background Technology

[0002] Battery packs, serving as the power source for cordless power tools, are typically detachably connected to the tool via a locking mechanism. Existing battery packs generally include a housing, a locking element movably connected to the housing, and a reset elastic element that keeps the locking element locked. The locking element has a button and a latch; pressing the button retracts the latch, allowing the battery pack to be removed from the power tool. This structure meets basic connection requirements under normal operating conditions. However, during the use of high-vibration tools such as impact drills, hammer drills, and electric picks, the repeated inertial and impact forces generated by vibration can cause the latch to overcome the elasticity of the reset elastic element and retract inwards, resulting in the battery pack accidentally detaching from the tool. This detachment not only causes the tool to lose power and stop operating but can also damage the battery pack, potentially leading to short circuits, thermal runaway, or fires, causing significant inconvenience to the operator. Therefore, ensuring the reliability of the locking mechanism while maintaining ease of unlocking under high-vibration conditions is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, this application provides a power tool battery pack that can effectively prevent the battery pack from accidentally disengaging due to vibration, thereby improving the reliability of the connection between the battery pack and the power tool.

[0004] To achieve the above objectives, this application adopts the following technical solution: A power tool battery pack includes a housing, a locking member, and a reset elastic member. The locking member is movably connected to the housing and has a locked state and an unlocked state. The reset elastic member is connected between the locking member and the housing to keep the locking member in the locked state or reset it to the locked state. The locking member includes a first button and a latch, with the latch at least partially extending outward from the housing. The battery pack also includes a second button, a locking support, and a locking elastic member. The locking support is movably connected within the housing and has a locking position that restricts the latch from switching from the locked state to the unlocked state and a release position that allows the latch to switch states. The second button is movably connected to the housing and is linked to the locking support. The locking elastic member is connected to the locking support or the second button to keep the locking support in the locked position or reset it to the locked position. The second button is partially exposed on the housing surface. The second button includes a... The abutting part abuts against the first button inward. The first button and the second button operate in the same direction. The first button has a first unlocking stroke, and the second button has a second unlocking stroke and a clearance stroke. The length of the clearance stroke is greater than or equal to the length of the first unlocking stroke. In the operating direction, the second unlocking stroke precedes the clearance stroke. When the second button is in the second unlocking stroke, the abutting part disengages from the first button, and the second button can move relative to the first button, so that the second button drives the locking support to switch from the locked position to the released position. When the second button is operated to the point where the abutting part abuts against the first button, the second button is in the clearance stroke. When the second button continues to move in the clearance stroke along the operating direction, the abutting part presses against the first button and drives the first button to perform the first unlocking stroke, so that the latch switches from the locked state to the unlocked state.

[0005] In the above technical solution, the second button is provided with an abutment for abutting the first button, and the first and second buttons operate in the same direction. By setting a second unlocking stroke and a clearance stroke for the second button, and making the length of the clearance stroke greater than or equal to the first unlocking stroke of the first button, sequential control of "unlocking the support first, then unlocking the latch" is achieved, and the user only needs to continuously operate to complete the two steps. Specifically, in the initial state, the abutment is disengaged from the first button. When the user starts to operate the second button, the second button first undergoes the second unlocking stroke. During this stroke, the abutment remains disengaged from the first button, and the second button moves independently, driving the locking support to switch from the locked position to the released position, releasing the restriction on the latch. Since the abutment has not yet contacted the first button at this time, the first button remains stationary, and the latch is still in the locked state. After the second button completes the second unlocking stroke, it enters the clearance stroke, at which point the abutment abuts the first button. During the clearance stroke, the second button continues to move, but the locking support always remains in the released position, providing unobstructed conditions for unlocking the first button. As the second button continues to move, the abutment part presses against the first button, causing it to synchronously execute the first unlocking stroke, switching the latch from the locked state to the unlocked state. Through this precise coordination of strokes, the unlocking operations of the second and first buttons are sequentially connected in time and do not interfere with each other. This ensures that the restriction of the locking support must be released before the latch can be unlocked. Simultaneously, the user only needs to continuously operate the second button to complete both steps, making the operation smooth and natural. This solution effectively avoids accidental unlocking due to vibration or accidental touch. Even in high-vibration environments, the latch will not loosen due to accidental operation of a single button, significantly improving the connection reliability and safety between the battery pack and the power tool.

[0006] Preferably, the second button covers the outside of the first button.

[0007] Preferably, the first button is provided with a clearance hole, and the second button includes a button body and a driving part. One end of the driving part is fixed to the button body, and the other end passes through the clearance hole to the inside of the first button and abuts against the locking support.

[0008] Preferably, the driving part is provided with a linkage inclined surface and a clearance part. The linkage inclined surface cooperates with the locking support member and is used to push the locking support member to move when the button body is operated, thereby causing the locking support member to disengage from the inner side of the latch. The clearance part is arranged adjacent to the linkage inclined surface and is used to make the locking support member cooperate with the clearance part when the second button continues to move along the operation direction after the locking support member switches from the locked position to the released position. When the locking support member cooperates with the clearance part, the locking support member remains in the released position.

[0009] Preferably, the locking support includes a locking part, a connecting part, and a linkage part arranged in sequence. The locking part abuts against the inner side of the latch, the connecting part is hinged to the housing, and the linkage part is located near the second button and is linked to the second button. The moving direction of the connecting part is perpendicular to the moving direction of the latch.

[0010] Preferably, there are two locking supports, which are symmetrically arranged on both sides of the latch. When the locking supports switch from the locked position to the released position, the two linkage parts are close to each other and the two locking parts are far apart. The locking elastic element is connected between the two linkage parts.

[0011] Preferably, the locking support includes a locking part and a linkage part. The locking part abuts against the inner side of the latch, and the linkage part is located near the second button and is linked to the second button. The locking support is slidably connected to the housing, and the sliding direction of the locking support is perpendicular to the movement direction of the latch.

[0012] Preferably, there are two locking supports, which are symmetrically arranged on both sides of the latch; when the locking supports are switched from the locked position to the released position, the two locking supports are far apart from each other, and the locking elastic element is connected between the two linkage parts.

[0013] Preferably, the latch and / or locking part is provided with a guide slope, which is used to guide the latch to push the locking support from the locked position to the released position when the locking support is in the locked position and the latch moves to the unlocked state.

[0014] Preferably, the housing has a through hole for a second button to pass through, the second button is sized to match the through hole and covers the through hole, and part of the structure of the first button is disposed inside the through hole. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the battery pack structure in this application; Figure 2 This is a partial structural diagram of this application. Figure 1 ; Figure 3 This is a partial structural diagram of this application. Figure 2 ; Figure 4 This is a partial structural diagram of the locking support in the locked position in this application. Figure 1 ; Figure 5 This is a partial structural diagram of the locking support in the locked position in this application. Figure 2 ; Figure 6 This is a partial structural diagram of the locking support in the released position in this application. Figure 1 ; Figure 7 This is a partial structural diagram of the locking support in the released position in this application. Figure 2 ; Figure 8 This is a partial structural diagram of the locking support in the released position and the second button in the clear travel position in this application. Figure 1 ; Figure 9 This is a partial structural diagram of the locking support in the released position and the second button in the clear travel position in this application. Figure 2 .

[0016] In the figure: housing 1, bottom shell 11, top cover 12, through hole 13, locking member 2, first button 21, clearance hole 211, latch 22, reset elastic member 3, second button 4, button body 41, linkage slope 42, clearance part 43, clearance groove 431, driving part 44, abutting part 45, locking support member 5, locking part 51, connecting part 52, linkage part 53, locking elastic member 6, guide slope 7. Detailed Implementation

[0017] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] Example 1: like Figures 1 to 9As shown, a power tool battery pack includes a housing 1, a locking member 2, and a reset elastic member 3. The locking member 2 is movably connected to the housing 1 and has a locked state and an unlocked state. The reset elastic member 3 is connected between the locking member 2 and the housing 1 to keep or reset the locking member 2 to the locked state. The locking member 2 includes a first button 21 and a latch 22, with the latch 22 at least partially extending to the outside of the housing 1. The battery pack also includes a second button 4, a locking support 5, and a locking elastic member 6. The locking support 5 is movably connected inside the housing 1 and has a locking position that restricts the latch 22 from switching from the locked state to the unlocked state and a releasing position that allows the latch 22 to switch states. The second button 4 is movably connected to the housing 1 and is linked to the locking support 5. The locking elastic member 6 is connected to the locking support 5 or the second button 4 to keep or reset the locking support 5 to the locked position. The second button 4 is partially exposed on the surface of the housing 1. The second button 4 includes a function for... The abutting part 45 abuts inward against the first button 21. The first button 21 and the second button 4 operate in the same direction. The first button 21 has a first unlocking stroke, and the second button 4 has a second unlocking stroke and a clearance stroke. The length of the clearance stroke is greater than or equal to the length of the first unlocking stroke. In the operating direction, the second unlocking stroke precedes the clearance stroke. When the second button 4 is in the second unlocking stroke, the abutting part 45 disengages from the first button 21, and the second button 4 can move relative to the first button 21 in the operating direction, so that the second button 4 drives the locking support 5 to switch from the locked position to the released position. When the second button 4 is operated to the point that the abutting part 45 abuts against the first button 21, the second button 4 is in the clearance stroke. When the second button 4 continues to move in the clearance stroke in the operating direction, the abutting part 45 presses against the first button 21 and drives the first button 21 to perform the first unlocking stroke, so that the first button 21 switches from the locked state to the unlocked state.

[0020] In the above technical solution, the second button 4 is provided with an abutting part 45 for abutting the first button 21, and the operating directions of the first button 21 and the second button 4 are the same. By setting the second unlocking stroke and the avoidance empty stroke of the second button 4, and making the length of the avoidance empty stroke greater than or equal to the first unlocking stroke of the first button 21, the sequential control of "unlocking the support first, then unlocking the latch" is realized, and the user only needs to continue operating to complete the two steps. Specifically, in the initial state, the abutting part 45 is disengaged from the first button 21. When the user starts to operate the second button 4, the second button 4 first goes through the second unlocking stroke. During this stroke, the abutting part 45 remains disengaged from the first button 21, and the second button 4 moves independently and drives the locking support 5 to switch from the locked position to the released position, releasing the restriction on the latch 22. Since the abutting part 45 has not yet contacted the first button 21 at this time, the first button 21 remains stationary, and the latch 22 is still in the locked state. When the second button 4 completes the second unlocking stroke, it enters the avoidance empty stroke, at which time the abutting part 45 abuts against the first button 21. During the free travel phase, the second button 4 continues to move, but the locking support 5 remains in the released position, providing unobstructed conditions for unlocking the first button 21. As the second button 4 continues to move, the abutment part 45 presses against the first button 21 and drives it to synchronously perform the first unlocking stroke, causing the latch 22 to switch from the locked state to the unlocked state. Through the precise coordination of the above strokes, the unlocking operation of the second button 4 and the unlocking operation of the first button 21 are sequentially connected in time and do not interfere with each other, ensuring that the restriction of the locking support 5 must be released before the latch 22 can be unlocked. At the same time, the user only needs to continuously operate the second button 4 to complete both steps, making the operation smooth and natural. This solution effectively avoids accidental unlocking due to vibration or accidental touch. Even in a high-vibration environment, the latch 22 will not be loosened due to accidental operation of a single button, significantly improving the connection reliability and safety between the battery pack and the power tool.

[0021] For ease of understanding, some key terms in this embodiment are explained below.

[0022] The term "movable connection" refers to a connection between two components that is not fixed but allows relative movement, such as sliding, rotating, or oscillating, enabling one component to change its position or orientation relative to the other within a certain range. In this application, the locking member 2 is movably connected to the housing 1, meaning that the locking member 2 can slide or rotate relative to the housing 1, thereby switching between a locked state and an unlocked state; the locking support member 5 is movably connected inside the housing 1, meaning that the locking support member 5 can rotate or slide relative to the housing 1, thereby switching between a locked position and a released position.

[0023] The “locked state” refers to the state in which the locking member 2 is able to lock the battery pack onto the power tool or charger. At this time, the latch 22 extends out of the outer side of the housing 1 and is engaged in the corresponding locking groove of the power tool or charger, preventing the battery pack from being pulled out.

[0024] The "unlocked state" refers to the state in which the locking member 2 is in a position that allows the battery pack to be removed from the power tool or charger. At this time, the latch 22 retracts into the housing 1 or exits the locking groove, thereby releasing the lock on the battery pack.

[0025] The "locked position" refers to the position where the locking support 5 interferes with or abuts against the latch 22 to prevent it from unlocking. In this position, the latch 22 cannot switch from the locked state to the unlocked state.

[0026] The “release position” refers to the position where the locking support 5 releases its interference or contact with the latch 22, that is, in this position, the latch 22 is allowed to switch from the locked state to the unlocked state.

[0027] The term "operation" refers to the user's act of applying external force to a button to cause it to shift or deform, including actions such as pressing, pushing, pulling, or rotating. In this application, pressing is preferred.

[0028] The "linkage connection" refers to the transmission relationship between the second button 4 and the locking support 5. When the second button 4 moves, it can directly or indirectly drive the locking support 5 to move. Specifically, the second button 4 can directly abut against the locking support 5 and push it to move; or the second button 4 can drive the locking support 5 to move through the inclined surface; or the second button 4 can drive the locking support 5 to move through the lever mechanism, linkage mechanism or gear and rack mechanism.

[0029] The term "inward contact" means that the contact part 45 on the second button 4 makes contact with the first button 21 and generates a pushing force in the direction towards the inside of the housing 1 (i.e., the direction of movement of the user operating the second button 4).

[0030] The “abutting part” refers to the structure on the second button 4 that is used to contact the first button 21 and transmit the thrust. It can be a protrusion, flange, end face or independent push rod.

[0031] The “first unlocking stroke” refers to the distance that the first button 21 needs to move from the locked state to the unlocked state.

[0032] The "second unlocking stroke" refers to the distance that the second button 4 needs to move from the locked position to the released position to drive the locking support 5. Within this stroke, the second button 4 moves independently and drives the locking support 5.

[0033] The term "avoiding empty travel" means that when the second button 4 moves within this travel range, the locking support 5 is always in the released position. During this process, the locking support 5 can remain stationary or continue to move but will never interfere with the latch 22 during the movement. The latch 22 can freely switch states.

[0034] It should be noted that the phrase "when the second button 4 is operated until the abutting part 45 abuts against the first button 21, the second button 4 is in the avoidance empty stroke" includes two scenarios: First, the second button 4 has just completed the second unlocking stroke, at which point the abutting part 45 is exactly in contact with the first button 21 and exactly enters the starting point of the avoidance empty stroke, i.e., the abutting position coincides with the starting position of the avoidance empty stroke; second, the second button 4 has completed the second unlocking stroke and has moved a certain distance within the avoidance empty stroke before the abutting part 45 contacts the first button 21, at which point the second button 4 is in a certain intermediate position within the avoidance empty stroke. In either case, the length of the avoidance empty stroke is set to be greater than or equal to the length of the first unlocking stroke to ensure that the first button 21 is not prematurely activated during the entire avoidance empty stroke of the second button 4, or even if it is activated, it will not affect the normal unlocking sequence of the latch 22.

[0035] Preferred, such as Figure 1 and Figure 2 As shown, the second button 4 covers the outside of the first button 21.

[0036] In the above technical solution, "covering" means that the second button 4 completely covers the first button 21 from the outside, so that the user cannot directly touch or press the first button 21 from the outside in a natural operating state. In other words, the first button 21 is wrapped or covered by the second button 4, and the user can only touch the second button 4. The above solution has the following beneficial effects: On the one hand, it forcibly guides the user to operate in a preset order—because the first button 21 is completely covered, the user cannot bypass the second button 4 to operate the first button 21 directly. Therefore, the user must first press the second button 4 to release the restriction of the locking support 5, and then the first button 21 can be unlocked by the second button 4, thereby fundamentally preventing accidental unlocking caused by accidentally touching the first button 21; on the other hand, the completely covered structure also plays a role in preventing dust and foreign object intrusion, avoiding dust or small particles from entering the gaps between the buttons, and ensuring the smoothness and reliability of the buttons in long-term use.

[0037] Preferred, such as Figure 2 and Figure 3As shown, the first button 21 is provided with a clearance hole 211, and the second button 4 includes a button body 41 and a driving part 44. One end of the driving part 44 is fixed to the button body 41, and the other end passes through the clearance hole 211 to the inside of the first button 21 and abuts against the locking support 5.

[0038] In the above technical solution, the first button 21 and the second button 4 are nested in the axial direction, saving internal space of the housing 1 and facilitating the miniaturization and compact design of the battery pack. In this embodiment, the abutting part 45 is located on the inner side of the button body 41.

[0039] It should be noted that the "avoidance hole 211" refers to a through hole opened on the first button 21, the diameter of which is slightly larger than the outer diameter of the drive part 44, so as to ensure that the drive part 44 can pass through freely without motion interference.

[0040] Preferably, the driving part 44 is provided with a linkage inclined surface 42 and a clearance part 43. The linkage inclined surface 42 cooperates with the locking support 5 and is used to push the locking support 5 to move when the button body 41 is operated, thereby causing the locking support 5 to disengage from the inside of the latch 22. The clearance part 43 is arranged adjacent to the linkage inclined surface 42 and is used to make the locking support 5 cooperate with the clearance part 43 when the second button 4 continues to move along the operation direction after the locking support 5 switches from the locked position to the released position. When the locking support 5 cooperates with the clearance part 43, the locking support 5 remains in the released position.

[0041] In the above technical solution, when the user presses the button body 41, the drive unit 44 moves inward, and the linkage inclined surface 42 moves accordingly, pushing the locking support 5, causing the locking support 5 to switch from the locked position to the released position, thus disengaging the locking support 5 from the inside of the latch 22 and releasing the restriction on the latch 22. The clearance part 43 is arranged adjacent to the linkage inclined surface 42. After the locking support 5 has switched to the released position, if the second button 4 continues to move in the operating direction, the linkage inclined surface 42 will pass over the mating part of the locking support 5, causing the locking support 5 to enter the clearance part 43. At this time, because the clearance part 43 provides clearance space, the locking support 5 remains in the released position without further interference with the drive unit 44. This structure converts the linear movement of the second button 4 into the lateral or rotational movement of the locking support 5 through the linkage inclined surface 42, realizing the drive of the unlocking support; while the clearance part 43 ensures that the locking support 5 is stably kept in the released position during the subsequent idle stroke, without unnecessary reset or jamming due to the continued movement of the second button 4.

[0042] It should be noted that the "linkage inclined surface" refers to an inclined plane or curved surface provided on the drive part 44, whose inclination direction and angle enable the drive part 44 to push the locking support 5 to produce the required displacement when it moves; the "avoidance part" refers to the recessed area (e.g., groove, notch or plane) adjacent to the linkage inclined surface 42; "fitting" means that after the locking support 5 enters the avoidance part 43, no force is generated between the two that hinders locking.

[0043] Specifically, such as Figure 1 As shown, the housing 1 includes a bottom shell 11 and a top cover 12. The bottom shell 11 and the top cover 12 are interlocked and fixedly connected by means of snap-fit, screws, or ultrasonic welding, forming a receiving cavity. The receiving cavity houses the battery pack, control board, and necessary electrical connection terminals. Specifically, the top cover 12 is provided with guide grooves and limiting ribs for cooperating with power tools or chargers to guide the battery pack insertion and prevent shaking. The top cover 12 is provided with through holes for the first button 21 and the second button 4 to pass through, and an opening for the latch 22 to extend out; the inner side of the top cover 12 is provided with a mounting base or pivot hole for hinged locking support 5. It should be noted that the specific shape and internal structure of the bottom shell 11 and the top cover 12 can be adaptively adjusted according to the overall appearance design and internal component layout of the battery pack, as long as they can provide an effective mounting base and motion constraint for the locking member 2, locking support 5, and various elastic components.

[0044] Preferably, the housing 1 is provided with a through hole 13 for the second button 4 to pass through, the second button 4 is sized to match the through hole 13 and covers the through hole 13, and part of the structure of the first button 21 is disposed in the through hole 13.

[0045] In the above technical solution, the top cover 12 of the housing 1 or a corresponding position has a through hole 13. The button body 41 of the second button 4 passes through the through hole 13, and the outer edge of the second button 4 matches the inner edge size of the through hole 13, so that the second button 4 can slide smoothly along the through hole 13. At the same time, the second button 4 completely covers the through hole 13 from the outside. Part of the structure of the first button 21 (e.g., its outer end or flange) is also located in the through hole 13 and is located inside the second button 4. With this structure, a closed sliding fit interface is formed between the second button 4 and the through hole 13, making it difficult for external dust and debris to enter the interior of the housing 1 through the button gap, effectively protecting the internal locking support 5 and various elastic components, and improving the reliability of long-term use. At the same time, since part of the structure of the first button 21 is located in the same through hole 13, the first button 21 and the second button 4 are arranged in an axial nested manner, and the two buttons share the same opening, avoiding the reduction in structural strength and the complexity of appearance caused by opening multiple independent through holes on the housing 1, which is conducive to maintaining the integrity and aesthetics of the housing 1. Since the second button 4 blocks the through hole 13, the user cannot directly see or touch the first button 21 from the outside, which further strengthens the guidance of the operation sequence - the user must use the second button 4 to indirectly operate the first button 21, fundamentally eliminating the possibility of directly and accidentally touching the first button 21.

[0046] It should be noted that the "through hole 13" refers to a through hole opened on the housing 1, the shape of which matches the outer contour of the second button 4 (e.g., circular, rectangular, or irregular); "size matching" means that the outer diameter of the second button 4 is slightly smaller than the inner diameter of the through hole 13 to ensure smooth sliding and no excessive gap; "covering" means that the second button 4 completely covers the opening of the through hole 13 in its natural state, making the interior of the housing 1 invisible; "part of the structure of the first button 21 is located inside the through hole 13" means that the end or protrusion of the first button 21 extends to the radially inner side of the through hole 13, but does not protrude to the outer surface of the housing 1, thus remaining inside the second button 4.

[0047] Preferably, the latch 22 and / or the locking part 51 are provided with a guide slope 7. The guide slope 7 is used to guide the latch 22 to push the locking support 5 from the locked position to the released position when the locking support 5 is in the locked position and the latch 22 moves to the unlocked state.

[0048] In the above technical solution, the latch 22 and / or locking part 51 are provided with a guide slope 7. This guide slope 7 is used to guide the latch 22 to push the locking support 5 from the locked position to the released position when the locking support 5 is in the locked position (i.e., the locking part 51 abuts against the inside of the latch 22) and the latch 22 moves towards the locked state (e.g., during the insertion of a battery pack into a power tool, the latch 22 is pushed inward by the tool housing). It should be noted that the latch 22 typically has a conventional slope on the side facing the battery pack insertion direction. This conventional slope is used to abut against the tool housing during insertion, causing the latch 22 to automatically retract inward. This is a common design in existing battery packs. This application, while retaining the conventional inclined surface, further adds a guide inclined surface 7 to the latch 22 and / or locking part 51. The function of the guide inclined surface 7 is that when the locking support 5 is in the locked position, and the latch 22 is pushed inward (e.g., by the force transmitted through the conventional inclined surface), the guide inclined surface 7 guides the latch 22 to slide relative to the locking part 51, pushing the locking support 5 to move out of position. The conventional inclined surface and the guide inclined surface 7 are respectively located at different positions on the latch 22 (the conventional inclined surface is located at the outer end of the latch 22, and the guide inclined surface 7 is located on the inner side wall of the latch 22). When the battery pack is inserted into the power tool, the latch 22 is compressed inward by the tool housing. At this time, if the locking support 5 is in the locked position, the inner side of the latch 22 will interfere with the locking part 51. Through the guide inclined surface 7, the contact between the two is no longer a perpendicular head-on collision, but a relative sliding between the inclined surfaces. The force of the latch 22 moving inward is decomposed into a component force perpendicular to the surface of the locking part 51 by the guide ramp 7, pushing the locking support 5 to move, causing the locking part 51 to automatically move away from the inside of the latch 22, thereby temporarily releasing the lock and allowing the latch 22 to continue to retract inward. It should be noted that the pushing force applied by the user during the battery pack insertion process is relatively large, which is sufficient to overcome the elastic force of the reset elastic element 3 and the elastic force of the locking elastic element 6 at the same time, allowing the latch 22 to retract smoothly and push the locking support 5 to move out of position. Therefore, the insertion operation will not be difficult due to the resistance of the locking support 5. When the battery pack is fully inserted, the latch 22 pops outward under the action of the reset elastic element 3 and locks into the locking groove of the power tool. At this time, the locking support 5 also returns to the locked position under the action of the locking elastic element 6, pressing against the inside of the latch 22. Therefore, the function of the guide ramp 7 is to realize the automatic unlocking function when the battery pack is inserted. The user can smoothly insert the battery pack into the power tool without having to operate the second button 4. During the insertion process, the locking support 5 will automatically move out of position and automatically lock after insertion, which greatly improves the convenience of use.

[0049] Meanwhile, during normal use, since the latch 22 is in a locked state and not squeezed inward, the locking support 5 remains locked and will not disengage due to vibration. From a mechanical perspective, the latch 22 needs to meet two conditions simultaneously to disengage: first, the latch 22 must overcome the elastic force of the reset elastic element 3 and move inward; second, the locking support 5 must overcome the elastic force of the locking elastic element 6 and move outward, releasing its contact with the inside of the latch 22. These two directions of movement are perpendicular to each other (the latch 22 retracts inward in the horizontal direction, and the locking support 5 swings in the vertical or lateral direction). The inertial force or impact force generated by vibration is usually a random excitation transmitted along a certain main direction, making it difficult to simultaneously and precisely provide two mutually perpendicular and sufficiently large forces to enable the two components to overcome their respective spring resistances and coordinate their movements. Unlike the large thrust actively applied by the user during insertion, the force generated by vibration has a smaller amplitude and random direction, often insufficient to overcome the resistance of both springs simultaneously. Even if the latch 22 occasionally experiences slight displacement due to vibration, the displacement is immediately prevented because the locking part 51 always abuts against its inner side, preventing the accumulation of enough stroke to fully retract the latch 22. Therefore, in a high-vibration environment under normal use, the two vertical moving mechanisms of the latch 22 and the locking support 5 mutually restrain each other, forming an "orthogonal locking" effect. Vibration in one direction cannot simultaneously break the force balance in the two vertical directions, thus achieving extremely high anti-vibration tripping capability. This solution realizes intelligent operation of "automatic yielding during insertion and automatic locking after tightening," ensuring locking reliability in high-vibration environments while maintaining the smooth experience of traditional battery pack insertion.

[0050] In some embodiments, such as Figure 3 As shown, the reset elastic element 3 and the locking elastic element 6 are configured as the same elastic element. The telescopic main body of the elastic element constitutes the reset elastic element 3, which has two torsion arms, and the two torsion arms are respectively connected to the two locking support elements 5.

[0051] In other embodiments, such as Figure 9 As shown, the reset elastic element 3 and the locking elastic element 6 are two independent elastic elements.

[0052] Example 2: like Figures 2 to 9 As shown, based on Embodiment 1, the locking support 5 includes a locking part 51, a connecting part 52 and a linkage part 53 arranged sequentially. The locking part 51 abuts against the inner side of the latch 22, the connecting part 52 is hinged to the housing 1, and the linkage part 53 is arranged near the second button 4 and linked with the second button 4. The moving direction of the connecting part 52 is perpendicular to the moving direction of the latch 22.

[0053] In the above technical solution, the locking support 5 includes a locking part 51, a connecting part 52, and a linkage part 53 arranged sequentially. The locking part 51 abuts against the inner side of the latch 22 to directly prevent the latch 22 from retracting inward when in the locked position; the connecting part 52 is hinged to the housing 1, allowing the locking support 5 to swing around the hinge point; the linkage part 53 is located near the second button 4 and is linked to the second button 4 (e.g., through a ramp or direct abutment). The direction of movement of the connecting part 52 (i.e., the swing direction of the locking support 5) is perpendicular to the direction of movement of the latch 22. When the second button 4 is pressed, the second button 4 pushes the linkage part 53, causing the locking support 5 to rotate around the hinge point of the connecting part 52, driving the locking part 51 away from the inner side of the latch 22, thereby switching from the locked position to the released position. Because the moving direction of the connecting part 52 is perpendicular to the moving direction of the latch 22, when the latch 22 is subjected to vibration or an external force attempts to retract inward, the moving direction of the latch 22 is perpendicular to the exiting direction of the locking part 51. The force of the latch 22 moving inward is difficult to convert into an effective component force that pushes the locking support 5 to rotate, thus forming an "orthogonal locking" effect, significantly enhancing vibration resistance. Simultaneously, this sequentially arranged structure (locking part 51, connecting part 52, and linkage part 53 arranged along the extending direction of the locking support 5), with the connecting part 52 as the hinge point in the middle and the locking part 51 and linkage part 53 located on either side of the connecting part 52, makes the locking support 5 form a lever structure with the connecting part 52 as the fulcrum. The moving directions of the locking part 51 and linkage part 53 are opposite. When the second button 4 pushes the linkage part 53 to one side, the locking part 51 moves in the opposite direction, thus moving away from the inner side of the latch 22. The above solution allows for the separate arrangement of buttons, latches 22, and locking elastic elements 6 within the limited space inside the housing 1, minimizing interference between components and making assembly and maintenance more convenient.

[0054] It should be noted that "arranged in sequence" means that the locking part 51, the connecting part 52, and the linkage part 53 are arranged in sequence along the length of the locking support member 5. The three can be integrally formed or separately fixedly connected. "Moving direction" refers to the movement direction of the connecting part 52 at the hinge point, that is, the tangential movement direction of the connecting part 52 or the direction of rotation around the axis when the locking support member 5 swings. "Perpendicular" means that the moving direction of the connecting part 52 is perpendicular to the moving direction of the latch 22. A certain manufacturing tolerance is allowed. As long as the included angle between the two is close to 90°, the orthogonal locking effect can be achieved.

[0055] Preferably, there are two locking support members 5, which are symmetrically arranged on both sides of the latch 22. When the locking support member 5 switches from the locked position to the released position, the two linkage parts 53 move closer to each other, the two locking parts 51 move further away from each other, and the locking elastic member 6 is connected between the two linkage parts 53.

[0056] In the above technical solution, when the second button 4 is pressed and drives the two linkage parts 53 to move closer to each other, the two locking support members 5 rotate around their respective connecting parts 52, causing the two locking parts 51 to move away from each other, thereby simultaneously disengaging from the inner side of the latch 22 from both sides, completing the switch from the locked position to the released position. When the second button 4 is reset, the locking elastic member 6 applies a separating elastic force to the two linkage parts 53, pushing the two linkage parts 53 away from each other, causing the two locking parts 51 to move closer to each other, and re-abut against the inner side of the latch 22, restoring the locked position. The above-mentioned double-sided symmetrical arrangement structure has the following beneficial effects: First, both sides of the latch 22 are simultaneously limited by the locking support members 5, resulting in balanced force and preventing the latch 22 from tilting or wearing unevenly due to unilateral locking, thus improving the smoothness of the latch 22's movement and its service life. Second, the locking elastic member 6 is directly connected between the two linkage parts 53, and one elastic member simultaneously drives the two locking support members 5 to reset, resulting in a compact structure, fewer parts, and reduced costs.

[0057] It should be noted that "the locking elastic element 6 is connected between the two linkage parts 53" means that both ends of the elastic element are connected to the two linkage parts 53 respectively, and the elastic force of the elastic element drives the movement of the two linkage parts 53. In this solution, a compression spring is preferred.

[0058] Example 3: Based on Embodiment 1, the locking support 5 includes a locking part 51 and a linkage part 53. The locking part 51 abuts against the inner side of the latch 22, and the linkage part 53 is located near the second button 4 and is linked with the second button 4. The locking support 5 is slidably connected to the housing 1, and the sliding direction of the locking support 5 is perpendicular to the movement direction of the latch 22.

[0059] In the above technical solution, the locking support 5 includes a locking part 51 and a linkage part 53. The locking part 51 abuts against the inner side of the latch 22 to directly prevent the latch 22 from retracting inward when in the locked position. The linkage part 53 is located near the second button 4 and is linked to the second button 4 (e.g., through an inclined surface or by direct contact). The locking support 5 is slidably connected to the housing 1, and its sliding direction is perpendicular to the movement direction of the latch 22. When the second button 4 is pressed, the second button 4 pushes the linkage part 53, causing the locking support 5 to slide in a direction perpendicular to the movement direction of the latch 22, thereby moving the locking part 51 away from the inner side of the latch 22, thus switching from the locked position to the released position. Since the sliding direction is perpendicular to the movement direction of the latch 22, when the latch 22 is subjected to vibration or an external force attempting to retract inward, its movement direction is perpendicular to the sliding direction of the locking support 5. The force of the latch 22 moving inward cannot be converted into an effective component force to push the locking support 5 to slide. Therefore, the locking support 5 will not be accidentally pushed open, forming a stable "orthogonal locking" effect.

[0060] It should be noted that the "sliding connection" refers to the linear reciprocating motion between the locking support 5 and the housing 1 through a structure such as a sliding groove, guide rail, or guide post; the "sliding direction" refers to the direction of movement of the locking support 5 when switching between the locked position and the released position; "perpendicular" means that the sliding direction is perpendicular to the movement direction of the latch 22. A certain manufacturing tolerance is allowed. As long as the included angle between the two is close to 90°, an orthogonal locking effect can be achieved, ensuring that the unlocking displacement of the latch 22 will not cause the locking support 5 to slide unexpectedly.

[0061] Preferably, there are two locking support members 5, which are symmetrically arranged on both sides of the latch 22. When the locking support member 5 is switched from the locked position to the released position, the two locking support members 5 are far apart from each other, and the locking elastic member 6 is connected between the two linkage parts 53.

[0062] In the above technical solution, there are two locking support members 5, which are symmetrically arranged on both sides of the latch 22, and both locking support members 5 are slidably connected to the housing 1. A locking elastic member 6 is connected between the two linkage parts 53. When the second button 4 is pressed, the second button 4 pushes the two linkage parts 53, causing the two locking support members 5 to slide away from each other in a direction perpendicular to the movement direction of the latch 22, thereby simultaneously moving the two locking parts 51 away from the inner side of the latch 22, thus simultaneously releasing the restriction on the latch 22 from both sides, completing the switch from the locked position to the released position. When the second button 4 is reset, the locking elastic member 6 applies a spring force to the two linkage parts 53, pushing the two locking support members 5 to slide closer together, causing the two locking parts 51 to re-abut against the inner side of the latch 22, returning to the locked position. This double-sided symmetrical sliding arrangement has the following advantages: First, the two locking supports 5 simultaneously limit the latch 22 from both sides, resulting in balanced forces. The latch 22 will not skew or wear on one side during vibration, ensuring smooth movement. Second, the locking elastic element 6 is directly connected between the two linkage parts 53. One elastic element simultaneously drives the two locking supports 5 to reset, resulting in a simple and compact structure that reduces component costs and assembly difficulty. Third, the two locking supports 5 slide in a direction perpendicular to the movement direction of the latch 22, forming an orthogonal lock. The force of the latch 22 retracting inward cannot be converted into an effective component force driving the locking supports 5 to slide, significantly enhancing vibration resistance. In addition, the sliding fit has high guiding accuracy and movement stability, maintaining accurate relative positions even after long-term use.

[0063] It should be noted that the phrase "the locking elastic element 6 is connected between the two linkage parts 53" means that the two ends of the elastic element are respectively connected to the two linkage parts 53. The elastic force of the elastic element drives the two locking support parts 5 to reset. In this solution, a compression spring is preferred. When the two linkage parts 53 move away from each other, the compression spring is compressed and stores energy. After the external force disappears, the spring pushes the two linkage parts 53 to move closer to each other and reset.

[0064] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A power tool battery pack, comprising a housing (1), a locking member (2), and a reset elastic member (3), wherein the locking member (2) is movably connected to the housing (1) and has a locked state and an unlocked state, and the reset elastic member (3) is connected between the locking member (2) and the housing (1) to keep or reset the locking member (2) to the locked state, the locking member (2) comprising a first button (21) and a latch (22), the latch (22) extending at least partially to the outside of the housing (1), characterized in that the battery pack It also includes a second button (4), a locking support (5), and a locking elastic member (6). The locking support (5) is movably connected inside the housing (1) and has a locking position that restricts the latch (22) from switching from a locked state to an unlocked state and a release position that allows the latch (22) to switch states. The second button (4) is movably connected to the housing (1) and linked to the locking support (5). The locking elastic member (6) is connected to the locking support (5) or the second button (4) to keep or reset the locking support (5) to the locked position. The second button (4) is partially exposed on the surface of the housing (1). The second button (4) includes an abutting part (45) for abutting the first button (21) inward. The first button (21) and the second button (4) have the same operating direction. The first button (21) has a first unlocking stroke. The second button (4) has a first unlocking stroke. The second button (4) has a second unlocking stroke and a clearance stroke. The length of the clearance stroke is greater than or equal to the length of the first unlocking stroke. In the operating direction, the second unlocking stroke precedes the clearance stroke. When the second button (4) is in the second unlocking stroke, the abutting part (45) disengages from the first button (21). The second button (4) can move relative to the first button (21) so that the second button (4) drives the locking support (5) to switch from the locked position to the released position. When the second button (4) is operated to the point that the abutting part (45) abuts against the first button (21), the second button (4) is in the clearance stroke. When the second button (4) continues to move in the clearance stroke in the operating direction, the abutting part (45) presses against the first button (21) and drives the first button (21) to perform the first unlocking stroke so that the latch (22) switches from the locked state to the unlocked state.

2. The power tool battery pack according to claim 1, characterized in that, The second button (4) covers the outside of the first button (21).

3. The power tool battery pack according to claim 1, characterized in that, The first button (21) is provided with a clearance hole (211). The second button (4) includes a button body (41) and a drive part (44). One end of the drive part (44) is fixed to the button body (41), and the other end passes through the clearance hole (211) to the inside of the first button (21) and abuts against the locking support (5).

4. A power tool battery pack according to claim 3, characterized in that, The drive unit (44) is provided with a linkage inclined surface (42) and a clearance part (43). The linkage inclined surface (42) cooperates with the locking support (5) and is used to push the locking support (5) to move when the button body (41) is operated, thereby causing the locking support (5) to disengage from the inside of the latch (22). The clearance part (43) is arranged adjacent to the linkage inclined surface (42) and is used to make the locking support (5) cooperate with the clearance part (43) when the second button (4) continues to move along the operation direction after the locking support (5) switches from the locked position to the released position. When the locking support (5) cooperates with the clearance part (43), the locking support (5) remains in the released position.

5. A power tool battery pack according to claim 1, characterized in that, The locking support (5) includes a locking part (51), a connecting part (52) and a linkage part (53) arranged in sequence. The locking part (51) abuts against the inside of the latch (22), the connecting part (52) is hinged to the housing (1), the linkage part (53) is located near the second button (4) and is linked to the second button (4). The moving direction of the connecting part (52) is perpendicular to the moving direction of the latch (22).

6. A power tool battery pack according to claim 5, characterized in that, The number of locking support members (5) is two, and the two locking support members (5) are symmetrically arranged on both sides of the latch (22); when the locking support member (5) switches from the locked position to the released position, the two linkage parts (53) move closer to each other, the two locking parts (51) move further away from each other, and the locking elastic member (6) is connected between the two linkage parts (53).

7. A power tool battery pack according to claim 1, characterized in that, The locking support (5) includes a locking part (51) and a linkage part (53). The locking part (51) abuts against the inside of the latch (22). The linkage part (53) is located near the second button (4) and is linked with the second button (4). The locking support (5) is slidably connected to the housing (1). The sliding direction of the locking support (5) is perpendicular to the movement direction of the latch (22).

8. A power tool battery pack according to claim 7, characterized in that, The number of locking support members (5) is two, and the two locking support members (5) are symmetrically arranged on both sides of the latch (22); the locking support members (5) switch from the locked position to the released position, the two locking support members (5) move away from each other, and the locking elastic member (6) is connected between the two linkage parts (53).

9. A power tool battery pack according to any one of claims 1 to 8, characterized in that, The latch (22) and / or locking part (51) are provided with a guide slope (7), which is used to guide the latch (22) to push the locking support (5) from the locked position to the released position when the locking support (5) is in the locked position and the latch (22) moves to the unlocked state.

10. A power tool battery pack according to claim 1, characterized in that, The housing (1) is provided with a through hole (13) for the second button (4) to pass through. The second button (4) is sized to match the through hole (13) and covers the through hole (13). Part of the structure of the first button (21) is located inside the through hole (13).

Images