Battery pack lock mechanism

Abstract

The utility model discloses a battery pack lock catch mechanism, including setting battery compartment's fuselage and battery pack (7), be equipped with the lock catch (1) in the battery compartment, the inner end portion of lock catch (1) is close to the battery compartment, the bottom of lock catch (1) is equipped with the positioning gap (4), battery pack (7) is equipped with the positioning boss (9);In the locking state, push battery pack (7) into the battery compartment, drive lock catch (1) swing to the inside direction of battery compartment, make the inner end surface of positioning boss (9) and positioning gap (4) embed and realize the axial positioning of battery compartment and fuselage, and the elastic structure of lock catch (1) is positioned in this locking state under the promotion of both sides. The lock catch mechanism adopts single inner push type locking and inner push type unlocking, and the operation is convenient, and the locking structure realizes locking and unlocking through a swing lock catch, the internal structure is simple, and the size of electrician's tool battery compartment can also be reduced.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, specifically a battery pack locking mechanism. Background Technology

[0002] Currently, there is a battery pack mounting structure for power tools. The tool housing includes a grip, and the battery compartment within the grip is connected to a receiving cavity. In this embodiment, the battery compartment is part of the receiving cavity, and the tool housing is formed by splicing two housing elements. A locking mechanism is located at the lower end of the tool grip near the battery compartment outlet. The locking mechanism is movably connected to a positioning hole on the battery pack for locking or unlocking the battery pack. In this embodiment, the locking mechanism can be implemented in various ways. Specifically, referring to the figure, the locking structure includes a latch, a button, and a spring. The latch extends to prevent the battery pack from detaching from the battery compartment outlet. The spring connects to the latch and drives its extension and retraction. When the button is pressed, the latch retracts to unlock the battery pack, at which point the battery pack pops out of the battery compartment under the action of the battery ejection mechanism. After the battery is inserted, the latch automatically resets under the action of the spring, and the latch inserts into the positioning hole on the battery pack to lock the battery pack inside the battery compartment. When the user needs to remove the battery pack, they only need to press the button lightly with their finger to pop the battery pack out of the battery compartment, making it more convenient. The locking mechanism includes a limiting rod and a telescopic drive device. The limiting rod is telescopic, with one end positioned near the battery compartment opening. The limiting rod extends to prevent the battery from detaching from the opening. The telescopic drive device drives the limiting rod to extend and retract. By extending the limiting rod to block the opening, the battery is effectively prevented from falling out. Pressing the button retracts the limiting rod, facilitating battery removal. After the battery is inserted, the limiting rod extends to lock the battery inside the battery compartment. The battery ejection mechanism is located at the end opposite the battery compartment. The battery ejection mechanism includes a fixed plate, a spring, and a sliding member. When the battery pack is inserted into the battery compartment, the sliding member moves upward, compressing the spring. When the locking mechanism unlocks, the spring resets the sliding member, ejecting the battery pack from the battery compartment. This battery pack locking structure uses a latch, button, and spring—a hook-lock structure. It requires manual button operation, making disassembly inconvenient, and frequent button operation poses a risk of breakage, resulting in poor durability.

[0003] A battery pack ejection mechanism is also disclosed. When a new battery pack needs to be replaced, the new battery pack is inserted into the battery casing, which is then inserted into the mounting casing. Once the mounting casing abuts against the first movable casing, the mechanism continues to push the first movable casing downwards relative to the mounting casing. Because the first push sleeve is connected to the first movable casing, the first locking surface of the first locking bar partially engages with the corresponding first toothed surface. Furthermore, the first locking bar and the corresponding first push block are both located within the same first unlocking groove. This allows the first push block to push the first locking bar to move directionally relative to the first unlocking groove. Simultaneously, the first spring is compressed, generating elastic force, creating a squeezing force between the first locking surface and the first toothed surface. When the first push block pushes the first locking surface out of the first unlocking groove, the first toothed surface is located within the plane of the first pressing groove, allowing the first locking surface to slide smoothly into the first pressing groove. That is, the first locking sleeve rotates relative to the fixed sleeve, the first push sleeve, releasing the force acting on the battery casing. At this time, the first locking sleeve is subjected to the force of the first spring. The elastic force causes the first card face to move along the trajectory of the first pressure groove until the end of the first card face abuts against the position between the first pressure groove and the first spacer. Because the end of the first card sleeve inserted into the first press sleeve contacts the first press sleeve, the first card sleeve drives the first press sleeve to return to a certain distance. When the end of the first card face abuts against the position between the first pressure groove and the first spacer, the first card face rotates to the first tooth surface of the second first tooth block. During this process, the battery case also rebounds to a certain height, but is still inserted in the mounting shell, so that the insertion rod is always in contact with the battery pack. During this process, the first movable shell also moves into the mounting shell. Because the first locking hook is connected to the first movable shell, the first locking hook also moves into the mounting shell, so that the first locking hook is squeezed by the inner wall of the mounting shell, and then the first locking hook will be engaged with the side wall of the battery case, thereby preventing the battery case from automatically detaching from the mounting shell during the use of the battery pack. When the battery pack needs to be removed again, simply press the first push sleeve again. The first toothed surface that contacts the first card surface pushes the first card surface to move along the side of the first partition. When the first toothed surface is in the plane where the end face of the first partition is located, the end face of the first partition is also set in an inclined shape, so that the first card surface moves along the trajectory of the end face of the first partition. That is, the first card sleeve rotates again. When the first card bar rotates into the first unlocking groove adjacent to the first partition, the first card surface and the toothed surface of the third first toothed block partially fit together. Simply remove the force acting on the battery case, and the first movable shell, the first card sleeve, and the first push sleeve are reset to their initial positions by the elastic force of the spring. The first card bar and the first push block are inserted into the first unlocking groove, so that the first lock hook is no longer squeezed by the inner wall of the mounting shell. The first lock hook can then be easily released from the battery case to separate the mounting shell from the battery case. The structure uses a press-type design, similar to that of a pen. While this makes it convenient to install and remove the battery pack, the complex internal structure increases the length of the power tool when the battery pack is installed, thus complicating the structure and reducing durability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a battery pack locking mechanism that adopts an inward-pushing locking and unlocking method, is easy to operate, and whose locking structure is achieved by a swinging latch. The internal structure is simple and can also reduce the size of the battery compartment of power tools.

[0005] The technical solution of this invention is to provide a battery pack locking mechanism with the following structure: a body with a battery compartment and a battery pack; a locking mechanism is provided inside the battery compartment; the locking mechanism is located near the inner end of the battery compartment; elastic structures are provided on both sides of the locking mechanism; a positioning notch is provided at the bottom of the locking mechanism; and a positioning boss is provided on the battery pack. In the locked state, the battery pack is pushed into the battery compartment, driving the locking mechanism to swing inward toward the battery compartment, so that the inner end face of the positioning boss engages with the positioning notch to achieve axial positioning of the battery compartment and the body; simultaneously, the locking mechanism is positioned in the locked state by the push of the elastic structures on both sides. In the unlocked state, an external force pushes the battery pack inward again, driving the locking mechanism to swing inward toward the battery compartment and enter the inner side of the positioning boss, at which point the locking mechanism is unlocked from the battery pack; finally, the battery pack is axially pushed outward of the battery compartment by the elastic force inside the battery compartment.

[0006] The latch has a first positioning end and a second positioning end, which are located on the same end face of the latch, and the end face is close to the axis of the battery compartment. The positioning notch is located in a concave position between the first positioning end and the second positioning end. The outer wall of the battery pack into the battery compartment is provided with a channel to provide space for the first positioning end and the second positioning end of the positioning notch to swing. The positioning boss is located at the front end of the channel.

[0007] The first positioning end and the second positioning end are located on the same end face of the latch, which is close to the side of the battery compartment axis. There is a concave positioning notch between the first positioning end and the second positioning end. The two sides of the positioning notch are the first inclined surface and the second inclined surface, respectively. The first inclined surface extends to one side of the first positioning end, and the other side of the first positioning end is one side of the latch. The second inclined surface extends to one side of the second positioning end, and the other side of the second positioning end is the other side of the latch. When the battery pack is pushed into the battery compartment in the locked state, the second positioning surface of the battery pack first contacts the side of the first positioning end. As it is pushed in continuously, the latch swings, and at the same time, the positioning boss contacts the free end of the first positioning end until the inner step of the positioning boss engages with the positioning notch.

[0008] The positioning boss extends out of the outer wall of the battery pack. The inner step of the positioning boss and the positioning notch are fitted together, meaning that the first inclined surface is in contact with the first positioning surface and the second inclined surface is in contact with the top surface of the positioning boss.

[0009] The center of the latch is rotatably connected to the machine body via a pivot. The outer side of the latch is provided with a first elastic structure, and the inner side is provided with a second elastic structure. The connection point between the first elastic structure and the latch is located between the rotation center of the latch and the first positioning end, and the connection point between the second elastic structure and the latch is located between the rotation center of the latch and the first positioning end. In the initial state and any swinging state of the latch, the first elastic structure and the second elastic structure always apply elastic force to both sides of the latch.

[0010] With the above structure, the present invention has the following advantages: 1. It adopts an inward-pushing insertion positioning and locking structure and an inward-pushing unlocking and removal structure. Both actions are achieved by the swinging of a latch, resulting in a simple structure. 2. The swinging of the latch is connected to the side wall of the battery compartment via a pivot, without affecting the length and radial dimensions of the battery compartment. 3. When the battery pack is inserted and positioned, the latch is pushed inward and swings, engaging with the positioning notch and positioning boss for positioning. At this time, the latch is simultaneously positioned in the locked state by the elastic devices on both sides. This structure achieves dynamic balance and prevents the latch from accidentally loosening and failing to lock the battery pack. 4. When removing the battery pack, the inward pushing method is also used. The latch is first swinged inward to separate the positioning notch from the positioning boss. At this time, the latch returns to its initial state under the action of the elastic devices on both sides. The battery pack is no longer restricted and can be directly removed. As it moves outward, the positioning boss touches the latch, pushing the latch outward to swing without locking. This operation is direct and clear, preventing accidental operation. Attached Figure Description

[0011] Figure 1 This is an exploded view of the battery pack and power tool of the present invention.

[0012] Figure 2 This is a schematic diagram of the latch of the present invention.

[0013] Figure 3 This is a schematic diagram of the battery pack of the present invention just inserted into the battery compartment.

[0014] Figure 4 This is a schematic diagram of the battery pack of the present invention before it is inserted into the battery compartment and locked.

[0015] Figure 5 for Figure 4 Enlarged schematic diagram of part A.

[0016] Figure 6 This is a schematic diagram of the battery pack of the present invention in the locked state after being inserted into the battery compartment.

[0017] Figure 7 for Figure 6 Enlarged schematic diagram of part B.

[0018] Figure 8 This is a schematic diagram of the battery pack of the present invention in the unlocked state after being inserted into the battery compartment.

[0019] Figure 9 for Figure 8 Enlarged schematic diagram of part C.

[0020] Figure 10 This is a schematic diagram of the battery pack of the present invention in the state of being just inserted into the battery compartment and then ejected.

[0021] As shown in the figure:

[0022] 1. Lock, 2. First positioning end, 3. Second positioning end, 4. Positioning notch, 5. First inclined surface, 6. Second inclined surface, 7. Battery pack, 8. Channel, 9. Positioning boss, 10. First positioning surface, 11. Second positioning surface, 12. Rotating shaft. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] like Figure 1-10 As shown, the battery pack locking mechanism of the present invention includes a body with a battery compartment and a battery pack 7. A locking buckle 1 is provided inside the battery compartment, and the locking buckle 1 is located near the inner end of the battery compartment. Elastic structures are provided on both sides of the locking buckle 1. In this embodiment, the elastic structures are two helical springs, which abut against both sides of the locking buckle 1. Alternatively, two torsion springs can also be used.

[0025] The latch 1 has a first positioning end 2 and a second positioning end 3, which are located on the same end face of the latch 1, near the axis of the battery compartment. There is a concave positioning notch 4 between the first positioning end 2 and the second positioning end 3. The battery pack 7 is inserted into the outer wall of the battery compartment and has a channel 8 to provide space for the first positioning end 2 and the second positioning end 3 of the positioning notch 4 to swing. The front end of the channel 8 has a positioning boss 9. In the locked state, the battery pack 7 is pushed into the battery compartment, driving the latch 1 to swing inward towards the battery compartment, so that the inner end face of the positioning boss 9 is engaged with the positioning notch 4 to achieve axial positioning of the battery compartment and the body. At the same time, the latch 1 is positioned in the locked state by the push of the elastic structure on both sides. In the unlocked state, the external force pushes the battery pack 7 inward again, driving the latch 1 to swing inward towards the battery compartment and enter the inner side of the positioning boss 9. At this time, the latch 1 and the battery pack are unlocked. Finally, the battery pack 7 is pushed outward axially by the elastic force in the battery compartment.

[0026] like Figure 1As shown, the outer wall of the battery pack 7 into which the battery compartment is inserted is provided with a channel 8, which provides space for the first positioning end 2 and the second positioning end 3 of the positioning notch 4 to swing. The front end of the channel 8 is provided with a positioning boss 9, which extends out of the outer wall of the battery pack 7. One end of the positioning boss 9 is connected to the channel 8, and the other end is an inclined surface and connected to the outer wall of the battery pack 7. The side of the positioning boss 9 located on one side of the channel 8 is the first positioning surface 10, and the inner end face of the battery pack 7 is the second positioning surface 11.

[0027] like Figure 1 and Figure 2 As shown, the first positioning end 2 and the second positioning end 3 are located on the same end face of the latch 1, which is close to the axis of the battery compartment. Between the first positioning end 2 and the second positioning end 3 is a concave positioning notch 4. The two sides of the positioning notch 4 are a first inclined surface 5 and a second inclined surface 6, respectively. The first inclined surface 5 extends to one side of the first positioning end 2, and the other side of the first positioning end 2 is one side of the latch 1. The second inclined surface 6 extends to one side of the second positioning end 3, and the other side of the second positioning end 3 is the other side of the latch 1. The length of the second inclined surface 6 is greater than that of the first inclined surface 5, and the positioning notch 4 is at a right angle. When the battery pack 7 is pushed into the battery compartment in the locked state, the second positioning surface 11 of the battery pack 7 first contacts the side of the first positioning end 2. As it continues to be pushed in, the latch 1 swings, and simultaneously the positioning boss 9 contacts the free end of the first positioning end 2, until the inner step of the positioning boss 9 engages with the positioning notch 4.

[0028] like Figure 6 and Figure 7 As shown, the positioning boss 9 extends out of the outer wall of the battery pack 7, and the inner step of the positioning boss 9 is engaged with the positioning notch 4, meaning that the first inclined surface 5 is in contact with the first positioning surface 10 and the second inclined surface 6 is in contact with the top surface of the positioning boss 9.

[0029] The center of the latch 1 is rotatably connected to the machine body via a rotating shaft 12. The outer side of the latch 1 is provided with a first elastic structure, and the inner side is provided with a second elastic structure. The connection point between the first elastic structure and the latch 1 is located between the rotation center of the latch 1 and the first positioning end 2. The connection point between the second elastic structure and the latch 1 is located between the rotation center of the latch 1 and the first positioning end 2. In the initial state and any swinging state of the latch 1, the first elastic structure and the second elastic structure always apply elastic force to both sides of the latch 1.

[0030] The working principle of the battery pack locking mechanism of the present invention:

[0031] In the initial state, the first elastic structure and the second elastic structure always apply elastic force to both sides of the latch 1, thereby placing the latch 1 in a position approximately perpendicular to the battery compartment axis.

[0032] like Figure 3 As shown, in the battery pack insertion state, the front end of the battery pack 7 abuts against the first positioning end 2 of the latch 1. As the battery pack continues to be inserted, the front end of the battery pack 7 pushes the latch 1 to swing inward around the pivot 12 until the top surface of the positioning boss 9 abuts against the bottom of the first positioning end 2. At this time, the latch 1 is just pushed by the battery pack 7.

[0033] like Figure 6 and Figure 7 As shown, in the locked state, the battery pack 7 is pushed inward. The outer wall of the battery pack 7 first touches the first positioning end 2. The first positioning end 2 is kept in contact with the first positioning end 2 under the action of the spring. Then, it enters the positioning boss 9 through the inclined surface on the left side of the positioning boss 9. Finally, the first positioning end 2 of the latch 1 separates from the top surface of the positioning boss 9. At this time, the first positioning end 2 of the latch 1 is unrestricted and rotates in the opposite direction around the rotating shaft 12, so that the first inclined surface 5 of the first positioning end 2 is in contact with the first positioning surface 10, and the second inclined surface 6 of the second positioning end 3 is in contact with the second positioning surface 11. At the same time, the inner top corner of the positioning boss 9 is engaged with the positioning notch 4, so that the battery pack 7 and the latch 1 are locked and axially limited. At this time, the latch 1 is positioned at this position under the action of the springs on both sides and the simultaneous action of the positioning boss 9 and the positioning notch 4.

[0034] like Figure 8 and Figure 9 As shown, in the first unlocking step, the battery pack 7 in the locked state is pushed inward. The positioning boss 9 pushes the second positioning end 3 of the latch 1, causing the latch 1 to swing inward around the rotating shaft 12. The second positioning end 3 of the latch 1 loses its restriction and rotates in the opposite direction around the rotating shaft 12, so that the side of the second positioning end 3 fits against the first positioning surface 10.

[0035] like Figure 10 As shown, in the second unlocking state, the battery pack 7 is pushed outward axially by the elastic force inside the battery compartment, while the second positioning end 3 swings outward around the rotating shaft 12 and moves outward along the top surface of the positioning boss 9.

Claims

1. A battery pack locking mechanism, characterized in that: The device includes a body with a battery compartment and a battery pack (7). The battery compartment is equipped with a latch (1). The latch (1) is located near the inner end of the battery compartment. Both sides of the latch (1) are provided with elastic structures. The bottom of the latch (1) is provided with a positioning notch (4). The battery pack (7) is provided with a positioning boss (9). In the locked state, the battery pack (7) is pushed into the battery compartment, and the latch (1) is driven to swing inward toward the battery compartment, so that the inner end face of the positioning boss (9) is embedded with the positioning notch (4) to achieve axial positioning of the battery compartment and the body. At the same time, the latch (1) is positioned in the locked state by the push of the elastic structures on both sides. In the unlocked state, the external force pushes the battery pack (7) inward again, driving the latch (1) to swing inward toward the battery compartment and enter the inner side of the positioning boss (9). At this time, the latch (1) is unlocked from the battery pack. Finally, the battery pack (7) is pushed outward axially by the elastic force inside the battery compartment.

2. The battery pack locking mechanism according to claim 1, characterized in that: The latch (1) is provided with a first positioning end (2) and a second positioning end (3). The first positioning end (2) and the second positioning end (3) are located on the same end face of the latch (1), which is close to the side of the axis of the battery compartment. The positioning notch (4) is located in a concave position between the first positioning end (2) and the second positioning end (3). The battery pack (7) is provided with a channel (8) on the outer wall of the battery compartment for the first positioning end (2) and the second positioning end (3) of the positioning notch (4) to swing and provide space. The positioning boss (9) is located at the front end of the channel (8).

3. The battery pack locking mechanism according to claim 1, characterized in that: The battery pack (7) has a channel (8) on the outer wall of the battery compartment for the first positioning end (2) and the second positioning end (3) of the positioning notch (4) to swing and provide space. The front end of the channel (8) is provided with a positioning boss (9), which extends out of the outer wall of the battery pack (7). The positioning boss (9) is located on one side of the channel (8) as the first positioning surface (10), and the inner end face of the battery pack (7) is the second positioning surface (11).

4. The battery pack locking mechanism according to claim 2 or 3, characterized in that: The first positioning end (2) and the second positioning end (3) are located on the same end face of the latch (1), which is close to the side of the axis of the battery compartment; there is a concave positioning notch (4) between the first positioning end (2) and the second positioning end (3), and the two sides of the positioning notch (4) are the first inclined surface (5) and the second inclined surface (6) respectively. The first inclined surface (5) extends to one side of the first positioning end (2), and the other side of the first positioning end (2) is one side of the latch (1); the second The inclined surface (6) extends to one side of the second positioning end (3), and the other side of the second positioning end (3) is the other side of the latch (1); when the battery pack (7) is pushed into the battery compartment in the locked state, the second positioning surface (11) of the battery pack (7) first contacts the side of the first positioning end (2); as it is pushed in continuously, the latch (1) swings, and at the same time the positioning boss (9) contacts the free end of the first positioning end (2) until the inner step of the positioning boss (9) is engaged with the positioning notch (4).

5. The battery pack locking mechanism according to claim 4, characterized in that: The positioning boss (9) extends out of the outer wall of the battery pack (7). The inner step of the positioning boss (9) and the positioning notch (4) are fitted together, meaning that the first inclined surface (5) fits into the first positioning surface (10) and the second inclined surface (6) fits into the top surface of the positioning boss (9).

6. The battery pack locking mechanism according to claim 1, characterized in that: The center of the latch (1) is rotatably connected to the machine body via a rotating shaft (12). The outer side of the latch (1) is provided with a first elastic structure, and the inner side is provided with a second elastic structure. The connection point between the first elastic structure and the latch (1) is located between the rotation center of the latch (1) and the first positioning end (2). The connection point between the second elastic structure and the latch (1) is located between the rotation center of the latch (1) and the first positioning end (2). In the initial state and any swinging state of the latch (1), the first elastic structure and the second elastic structure always apply elastic force to both sides of the latch (1).

7. The battery pack locking mechanism according to claim 6, characterized in that: In the initial state, the first elastic structure and the second elastic structure always apply elastic force to both sides of the latch (1), so that the latch (1) is in a position approximately perpendicular to the battery compartment axis.

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