Battery pack and battery system

Abstract

The invention relates to a battery pack and a battery system, the battery pack comprises a shell and a buckle mechanism connected to the shell, and the buckle mechanism is configured to mount / dismount the battery pack to an electric tool; the buckle mechanism is provided with an operating piece connected to the shell, a driven piece protruding upwards from the operating piece and a latch arranged on one side of the driven piece, the battery pack further comprises an adjusting mechanism connected to the buckle mechanism, and the adjusting mechanism is provided with a rotating disc for a user to operate, a supporting leg connected to the rotating disc and a supporting foot protruding towards the latch from the supporting leg; the supporting leg abuts against the side, opposite to the latch, of the driven piece. The electric tool further comprises a balance mechanism installed on the output shaft. According to the battery pack, the adjusting mechanism is arranged on an original battery pack, the adjusting mechanism provides the abutting and pushing force facing the inner wall of the battery containing part for the buckling mechanism, the latch is tightly connected to the latch receiving groove, the structure is simple, and the universality is high.

Description

Technical Field

[0001] The present invention relates to a battery pack, and particularly to a battery system having the battery pack.

Background Art

[0002] Rechargeable hand-held power tools are widely favored by users. For example, lithium battery wrenches, lithium battery drills, lithium battery angle grinders, lithium battery hammers, etc. Due to multiple pluggings and unplugging of the battery pack, there is a risk of contact failure at the contact part between the latch of the existing battery pack and the latch receiving groove of the power tool. The latch may malfunction due to fatigue, resulting in the detachment of the battery pack from the power tool.

[0003] In addition, during the operation of the battery pack in cooperation with the power tool, vibrations always exist, and the vibration frequencies and periods are different. Due to constraints such as the shape, platform, and plugging force of the latch of the battery pack, it is necessary to design a latch that can ensure that the plugging force is not too large and solve problems such as wear resistance within a limited space.

[0004] For the improvement of the above structure, reference can be made to U.S. Patent No. 15 / 270488, published on April 30, 2019, which discloses a battery retention system that firmly fixes the battery pack in the power tool through a double-locking mechanism with spring arms and latch contact surfaces, solving the problem of latch failure due to vibration. However, the spring arms need to be biased in the cavity of the power tool and engage with the card slots on the battery pack. The double-locking mechanism needs to change the structure on the inner wall of the power tool and the outer wall of the battery pack. Therefore, the spring arms can only be applied to some newly developed power tools and cannot meet the development requirements of platformization. Thus, the compatibility of the double-locking mechanism is poor.

[0005] In view of this, it is necessary to provide an improved battery pack and battery system to overcome the defects of the prior art.

Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a battery pack with high adaptability and a battery system having the battery pack.

[0007] The technical solution adopted by the present invention to solve the problems of the prior art is as follows: A battery pack is adapted to an electric tool to provide power. The battery pack includes a housing and a buckle mechanism connected to the housing. The buckle mechanism is configured to mount / dismount the battery pack to / from the electric tool. The buckle mechanism has an operating member connected to the housing, a driven member protruding upward from the operating member, and a latch disposed on one side of the driven member. The battery pack further includes an adjusting mechanism connected to the buckle mechanism. The adjusting mechanism has a turntable for user operation, a support leg connected to the turntable, and a support foot protruding from the support leg toward the latch. The support foot abuts against the side of the driven member opposite to the latch.

[0008] A further improvement is that the support foot has a relatively large end and a relatively small end. The width of the large end is greater than the width of the small end. In response to the rotation of the adjusting mechanism, the large end or the small end abuts against the driven member.

[0009] A further improvement is that the buckle mechanism further has a groove recessed from the driven member. The groove and the latch are respectively located on both sides of the driven member. The adjusting mechanism has a plurality of protrusions formed at the end of the support foot. The plurality of protrusions are spaced apart, and any one of the protrusions is engaged with the groove.

[0010] A further improvement is that the turntable is movably connected to the housing. The adjusting mechanism has a support member connected to the turntable. The extending direction of the support member is parallel to the rotation axis of the turntable. The turntable drives the support member to rotate, driving the driven member to offset relative to the rotation axis of the turntable.

[0011] A further improvement is that when the large end abuts against the driven member, the included angle between the extending axis of the driven member and the rotation axis of the turntable is 0.3° - 15°. When the small end abuts against the driven member, the included angle between the extending axis of the driven member and the rotation axis of the turntable is 0° - 0.3°.

[0012] A further improvement is that the adjusting mechanism has a chassis adjacent to the housing. The turntable is rotatably connected to the chassis. The chassis has a support plate connected to the housing and an avoidance hole penetrating through the support plate. The support member passes through the avoidance hole.

[0013] A further improvement is that the outer periphery of the turntable is provided with an anti-slip portion, and the turntable is located below the housing.

[0014] The present invention can also adopt the following technical solutions to solve the problems of the prior art: A battery pack is adapted to an electric tool to provide power. The battery pack includes a housing, a battery pack and a control board mounted on the housing, and a terminal connected to the control board. The terminal is connected to the electric tool to transmit the power of the battery pack; the battery pack further includes a buckle mechanism connected to the housing and an adjustment mechanism connected to the buckle mechanism. The buckle mechanism is configured to mechanically mount / dismount the battery pack to / from the electric tool. In response to the rotation of the adjustment mechanism, the adjustment mechanism applies a thrust force in a direction away from the battery pack to the buckle mechanism.

[0015] A further improvement is that: the buckle mechanism has an initial position and a deflected position. When the buckle mechanism is in the initial position, the buckle mechanism has a first extension direction; when the buckle mechanism is in the deflected position, the buckle mechanism has a second extension direction, and the first extension direction intersects with the second extension direction.

[0016] A further improvement is that: the buckle mechanism has an operating member connected to the housing, a driven member protruding upward from the operating member, a latch disposed on one side of the driven member, and a groove recessed from the driven member. The latch and the groove are respectively located on both sides of the driven member. At least a part of the adjustment mechanism presses against the groove, and in response to the rotation of the adjustment mechanism, the thrust force pushes the latch to deflect towards the inner wall of the electric tool.

[0017] A further improvement is that: two buckle mechanisms are provided. When the adjustment mechanism rotates, the minimum distance between the two buckle mechanisms expands or contracts.

[0018] The present invention can also adopt the following technical solutions to solve the problems of the prior art: A battery system includes an electric tool and a battery pack mounted on the electric tool. The electric tool has a main body part and a handle part connected to the main body part. The insertion and removal direction of the battery pack is parallel to the extension direction of the handle part, and at least a part of the battery pack is received in the handle part. The locking mechanism of the electric tool is connected to the buckle mechanism of the battery pack; the battery pack includes an adjustment mechanism for operating the buckle mechanism. When the battery pack is inserted into the electric tool, in response to the rotation of the adjustment mechanism, the buckle mechanism deflects towards the inner wall direction of the handle part.

[0019] A further improvement is that: the housing has a bottom case and an end cover connected to the bottom case. The bottom case surrounds the outer periphery of the end cover. The buckle mechanism is integrally injection-molded with the bottom case, and the buckle mechanism is disposed on the outer periphery of the end cover. The adjustment mechanism is located between the buckle mechanism and the end cover.

[0020] A further improvement solution is as follows: The adjusting mechanism has a turntable movably installed on the housing and a support member connected to the turntable, and the extending direction of the support member is parallel to the extending direction of the end cover.

[0021] A further improvement solution is as follows: The material hardness of the support member is greater than the material hardness of the buckle mechanism.

[0022] A further improvement solution is as follows: A metal reinforcement is embedded inside the support member.

[0023] Compared with the prior art, the present invention has the following beneficial effects: By providing an adjusting mechanism on the original battery pack, the adjusting mechanism provides a thrust force towards the inner wall of the battery accommodating portion to the buckle mechanism, so that the latch is tightly connected to the latch receiving groove. The structure is simple and has strong compatibility. Only by adding an adjusting mechanism to the battery pack can the effective fixation of the latch be realized, solving the wear problem during long-term use, and there is no need to add new structures or make changes to the power tool; and a protrusion is provided on the support leg of the adjusting mechanism, and the protrusion can engage with the groove to fix the support leg relative to the follower.

Description of the Drawings

[0024] The following further describes the specific embodiments of the present invention in detail with reference to the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the battery system of the present invention;

[0026] Figure 2 is Figure 1 A disassembled schematic diagram of the battery pack and the power tool in the shown battery system;

[0027] Figure 3 is Figure 2 A schematic diagram of the structure of the power tool in the shown battery system;

[0028] Figure 4 is Figure 3 A partial enlarged view of the battery accommodating portion of the shown power tool;

[0029] Figure 5 is Figure 4 A schematic diagram of the structure of the battery accommodating portion from another angle of the shown one;

[0030] Figure 6 is Figure 2 A schematic diagram of the structure of the battery pack in the shown battery system;

[0031] Figure 7 is Figure 6 A schematic diagram of the structure of the shown battery pack from another angle;

[0032] Figure 8Yes Figure 6 Partial disassembly schematic diagram of the battery pack shown;

[0033] Figure 9 Yes Figure 6 Structural disassembly schematic diagram of the battery pack shown;

[0034] Figure 10 Yes Figure 8 Partial enlarged view of the support feet in the battery pack shown;

[0035] Figure 11 Yes Figure 8 Structural schematic diagram of the bottom case in the battery pack shown;

[0036] Figure 12 Yes Figure 11 Structural schematic diagram of the bottom case from another angle shown;

[0037] Figure 13 Yes Figure 8 Structural schematic diagram of the adjustment mechanism in the battery pack shown.

Specific Embodiments

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", "left", "right" etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0040] In this embodiment, the battery system 1000 is composed of a power tool and a battery pack 100. Among them, the power tool is a screwdriver 200 powered by the battery pack 100, which is attached with an impact function and is generally applicable to tightening or loosening screws and / or bolts. In other embodiments, the battery pack 100 can also be used in cooperation with other types of handheld power tools. For example, it can be used for other power tools in application scenarios such as drilling, grinding, and cutting.

[0041] Among them, the above battery pack 100 includes four battery cells 21 disposed in the housing 1 and electrically coupled to the terminal 4. The battery cells 21 provide power for the battery tool. In the present embodiment, the four battery cells 21 are arranged in series, and each battery cell 21 has a nominal voltage of approximately four volts, so that the battery pack 100 has a nominal voltage of approximately sixteen volts. In other embodiments, the battery pack 100 may include more or fewer battery cells 21, and the battery cells 21 may be arranged in series, parallel, or a series-parallel combination. For example, the battery pack 100 may be arranged with three battery cells 21 in series, generating a nominal voltage of approximately 12V. In other embodiments, the battery cells 21 may have different nominal voltages, such as 3.6V, 3.8V, 4.2V, etc.; and may have different rated capacities, such as 1.2Ah, 1.3Ah, 2.0Ah, 2.4Ah, 2.6Ah, 3.0Ah, etc. In other embodiments, the battery pack 100 may have different nominal voltages, such as 10.8V, 14.4V, etc. The battery cell 21 in the present embodiment is a lithium-ion battery unit. In other embodiments, the battery 21 may have other suitable chemistries.

[0042] Please refer to Figure 1 and Figure 2 As shown, the above screwdriver 200 includes a housing 201, a motor installed in the housing 201, a driving mechanism coupled to the motor, and an output end 204 mechanically connected to the driving mechanism. The motor drives the driving mechanism and the output end 204 to operate, and the driving mechanism can be a torque transmission mechanism. In other embodiments, other driving mechanisms may be employed, such as an eccentric driving mechanism, a reduction gear mechanism.

[0043] In the present embodiment, the screwdriver 200 is generally in a pistol shape, and it has a main body portion 205 extending generally along a longitudinal direction, a handle portion 206 connected to the main body portion 205, and a battery receiving portion 207 formed at the handle portion 206; the extending direction of the main body portion 205 intersects with the extending direction of the handle portion 206, and in a special scenario, the extending direction of the main body portion 205 can be perpendicular to the extending direction of the handle portion 206. Among them, the handle portion 206 extends downward from the main body portion 205, and the main body portion 205 and the handle portion 206 can be integrally injection-molded, and both are of a half-type structure, facilitating the assembly of the screwdriver 200. During the operation, the handle portion 206 is for the operator to hold, the size of the handle portion 206 is adapted for the use of most users, and the trigger 216 and the changeover switch 217 are arranged around the handle portion 206, facilitating the user to operate the start / stop and forward / reverse control functions of the screwdriver 200.

[0044] Among them, the battery pack 100 is detachably installed in the battery receiving portion 207, which is a hollow structure, so that at least part of the battery pack 100 is received in the battery receiving portion 207. By inserting the battery pack 100 into the handle portion 206, the length of the screwdriver 200 in the up and down direction is reduced, and the whole machine is more miniaturized, which is convenient to carry for outdoor work.

[0045] Combined with Figures 3 to 5 As shown, the screwdriver 200 also has a socket fixed in the handle portion 206, and the socket is used for mechanical and / or electrical connection with the terminal 4 of the battery pack 100 to transmit the power of the battery pack 100. The socket is arranged at the upper end of the battery receiving portion 207, which is convenient for mating with the terminal 4.

[0046] In this embodiment, the above-mentioned battery receiving portion 207 has a chamber 208, a guide rail 209 formed on the inner wall of the handle portion 206, an anti-fooling strip 210, a clamping rib 211, a latch receiving groove 212, an auxiliary fixing rail 214, and an operating member receiving groove 215 recessed from the bottom of the handle portion 206. The inner wall shape of the battery receiving portion 207 is adapted to the outer contour of the battery pack 100, which is convenient for the insertion and extraction of the battery pack 100 and prevents it from shaking during operation.

[0047] Furthermore, the clamping rib 211 is used to surround the outer periphery of the battery pack 100 to closely engage the battery pack 100 in the chamber 208; the latch receiving groove 212 and the operating member receiving groove 215 are engaged with the matching structures on the battery pack 100, so that the battery pack 100 and the screwdriver 200 form a detachable connection, which is convenient for replacing the battery pack 100.

[0048] Among them, the anti-fooling strip 210 is used to prevent the mis-mating of the battery pack 100, avoid the user from inserting the positive and negative electrodes of the battery pack 100 reversely with the positive and negative electrodes of the socket, and improve the safety of operation.

[0049] Combined with Figures 6 to 9 As shown, the above-mentioned battery pack 100 mainly includes a housing 1, a battery pack 2 installed in the housing 1, a control board 3, and a terminal 4 connected to the control board 3; the terminal 4 is connected to the screwdriver 200 to transmit the power of the battery pack 100.

[0050] In this embodiment, the above-mentioned housing 1 has a bottom case 11 and an end cover 12 connected to the bottom case 11. The bottom case 11 and the end cover 12 are assembled to form a receiving cavity for installing components such as the battery pack 2, the control board 3, and the terminal 4; among them, the bottom case 11 and the end cover 12 can be fixed by snap connection; in other embodiments, the bottom case 11 and the end cover 12 may be fixed by screws or a combination of screws and snap connections.

[0051] Specifically, the above-mentioned end cap 12 has an inner cavity 121 for installing the control board 3, a terminal insertion port 122 adjacent to one end of the control board 3, and several lugs 123 provided at the other end; the depth of the inner cavity 121 is less than the length of the battery cell 21. Thus, a part of the battery cell 21 protrudes, and the protruding part is defined as the protruding portion 21a. When the battery cell 21 is installed in the inner cavity 121, the protruding portion 21a is received in the bottom case 11. This embodiment adopts a two-stage structure to receive the battery cell 21, which is beneficial to the assembly of the battery cell and can also prevent media such as water from flowing into the inner cavity 121, causing a short circuit of the battery cell 21.

[0052] The above-mentioned bottom case 11 has a lower bottom wall 111, a peripheral side wall 112 surrounding the lower bottom wall 111, a positioning groove for installing the battery cell, and hooks 113 formed on the peripheral side wall 112. The peripheral side wall 112 surrounds the outer periphery of a part of the end cap 12. The bottom case 11 and the end cap 12 are fixedly connected by the hooks 113 and the lugs 123. In addition, the bottom case 11 and the end cap 12 are also provided with an anti-misassembly structure to prevent misassembly.

[0053] In this embodiment, the four battery cells 21 of the battery pack 2 are electrically connected by a plurality of connection pieces 7. The connection piece 7 transmits the power of the battery cell 21 to the control board 3 via the wire 9, and then outputs it to the outside by the terminal 4. During the assembly process of the battery pack 100, first arrange the four battery cells 21, place the connection piece 7 on the end of the battery cell 21 for welding operation, then simply fix the welded battery cell 21 by the bracket 8, and then fix the control board 3 on the bracket 8. The positive connection piece and the negative connection piece in the wire 9 and the connection piece 7 are electrically connected. At the same time, the temperature sensor can be placed on the surface of any one of the battery cells 21. After the operation is completed again, the partially assembled battery pack 2 is placed in the end cap 12, and then waterproof materials such as a sponge pad and a waterproof pad are installed. Finally, the bottom case 11 and the end cap 12 are buckled together, and thus the battery pack 100 is basically assembled.

[0054] To solve the problem that the long-term insertion and matching of the battery pack 100 and the power tool 200 causes wear of the latch, or the problem of the inner wall error of the battery receiving portion 207 of the screwdriver 200 itself, or the problem of the large vibration generated during the operation of the power tool 200 itself, these scenarios require a tight connection between the battery pack 100 and the charger 200.

[0055] In this embodiment, the battery pack 200 further includes a buckle mechanism 5 connected to the bottom case 11 and an adjustment mechanism 6 connected to the buckle mechanism 5. The buckle mechanism 5 is configured to mount / dismount the battery pack 100 to / from the screwdriver 200. Moreover, for the adjustment mechanism 6, when the battery pack 100 and the screwdriver 200 are connected together, rotating the buckle mechanism 5 in a certain direction will make the connection between the battery pack 100 and the screwdriver 200 tighter. When pressing the buckle mechanism 5 again to attempt to disassemble the two, the battery pack 100 and the screwdriver 200 cannot be separated or cannot be easily separated. It is necessary to rotate the adjustment mechanism 6 in another direction again so that the adjustment mechanism 6 no longer has a large thrust against the buckle mechanism 5 or has no thrust at all. It can be understood that when the battery pack 100 is inserted into the screwdriver 200, in response to the rotation of the adjustment mechanism 6, the buckle mechanism 5 deflects outward toward the inner wall of the handle portion 206.

[0056] As shown in combination with Figures 10 to 13 shown, the above-mentioned buckle mechanism 5 is integrally injection-molded with the bottom case 11, and the buckle mechanism 5 can have a certain amount of deflection relative to the bottom case 11 for realizing the unlocking and locking of the buckle mechanism 5. Among them, the buckle mechanism 5 has an operating member 51 connected to the peripheral side wall 112, a driven member 52 protruding upward from the operating member 51, a latch 53 disposed on one side of the driven member 52, and a groove 54 recessed from the surface of the driven member 52. The latch 53 and the groove 54 are respectively located on both sides of the driven member 52. Among them, the number of the buckle mechanisms 5 is set to two, and they are symmetrically arranged on both sides of the battery pack 100. The buckle mechanism 5 is generally located on the outer periphery of the end cover 12, and there is a large gap between the two, reserving a pressing operation space for the buckle mechanism 5. When performing the disassembly and assembly operation between the battery pack 100 and the screwdriver 200, press the two operating members 51 simultaneously to make the two operating members 51 approach each other, and the entire buckle mechanism 5 deflects toward the end cover 12. Specifically, anti-slip ribs are also provided on the operating member 51 to increase the friction between the operating member 51 and the operator's fingers, and the operating member 51 can be received in the operating member receiving groove 215 to prevent unnecessary structures from interfering with the operation.

[0057] Specifically, the above-mentioned latch 53 is generally a reverse buckle in the shape of a triangle for engaging with the latch receiving groove 212 to lock the battery pack 100 to the screwdriver 200.

[0058] In this embodiment, the above-mentioned adjustment mechanism 6 has a turntable 61 for user operation, a support member 62 connected to the turntable 6, and a chassis 63 connected to the lower bottom wall 111. The chassis 63 is detachably fixed to the lower bottom wall 111. The turntable 61 and the support member 62 are integrally formed or detachably connected, and the turntable 61 is detachably fixed to the bottom of the chassis 63.

[0059] Among them, the above-mentioned chassis 63 has a support plate 631 adjacent to the lower bottom wall 111, an avoidance hole 632 and a locking hole 634 penetrating through the support plate 631, and a latch 633 protruding from the support plate 631. The latch 633 is used to connect with the lower bottom wall 111. Further, at least one fixing hole is provided on the lower bottom wall 111. The latch 633 can penetrate into the end cover 12 from the fixing hole and is snap-fitted with any rib position of the end cover 12. The latch 633 can be designed with a shape adapted to the rib positions in the original end cover 12, so that the fixed connection between the chassis 63 and the lower bottom wall 111 does not affect the internal structure of the original battery pack 100.

[0060] Further, there is a certain interval in the vertical direction between the support plate 631 and the lower bottom wall 111, reserving space for the installation between the turntable 61 and the chassis 63.

[0061] Specifically, the above-mentioned turntable 61 is rotatably connected below the chassis 63, and the shape of the turntable 61 can be similar to that of the chassis 63, generally oval. The turntable 61 is mainly provided for the user to perform a rotation operation. Optionally, an anti-slip portion 61a is provided on the outer periphery of the turntable 61 to facilitate the user's rotation operation. The anti-slip portion 61a can be formed by a plurality of ribs arranged at intervals, or other anti-slip structures can be applied to the outer periphery of the turntable 61.

[0062] Further, the turntable 61 has a locking portion 611 protruding from the bottom wall towards the direction where the support plate 631 is located. The locking portion 611 is generally located at the central part of the turntable 61. The locking portion 611 is fixed to the locking hole 634, thereby fixing the turntable 61 to the chassis 63. Among them, the locking portion 611 is located above the support plate 631, and the locking portion 611 abuts against the support plate 631, with a clearance fit or an interference fit between the two, so that the turntable 61 is fixed relative to the chassis 63 in the axial direction and can rotate in the circumferential direction.

[0063] In this embodiment, the extending direction of the support member 62 is parallel to the rotation axis of the turntable 61. The rotation of the turntable 61 will synchronously drive the support member 62 to rotate, thereby driving the driven member 52 to deflect relative to the rotation axis of the turntable 61. The support member 62 has a support leg 621 connected to the turntable 61, a support foot 622 protruding from the support leg 621 towards the latching mechanism 5, and a plurality of protrusions 623 formed on the edge of the support foot 622. The support member 62 is configured to press the driven member 52 towards the latch receiving groove 212. In other words, the support member 62 provides a pressing force that presses the driven member 52 against the latch receiving groove 212. The magnitude of this pressing force can be adjusted by the turntable 61, so that the latching mechanism 5 can be fixed to the latch receiving groove 212 with a certain force in the substantially radial direction according to actual usage requirements. Specifically, when the vibration generated during the use of the power tool 200 is relatively large, or the latch 53 is severely worn after long-term use, the turntable 61 can be rotated by a large angle. The turntable 61 can rotate 0° - 30° around the rotation axis in the up-down direction. When rotated to 30°, the pressing force of the support member 62 reaches the maximum value.

[0064] Among them, the above-mentioned support leg 621 is adjacent to the edge of the turntable 61, and is arranged on the outer periphery of the locking portion 611. The support leg 621 can pass through the avoidance hole 632 and is located between the end cover 12 and the latching mechanism 5. On the one hand, it does not affect the use of the original structure, and on the other hand, a support foot 622 can be provided on the support leg 621 to further support the latching mechanism 5.

[0065] Specifically, the above-mentioned support foot 622 abuts against the side of the driven member 52 opposite to the latch 53. The support foot 622 provides an outward pressing force, so that the latch 53 is firmly fixed in the latch receiving groove 212. The support foot 622 is generally in the shape of a right trapezoid, and has a large end 622a and a small end 622b arranged oppositely. The width of the large end 622a is greater than the width of the small end 622b. In response to the rotation of the turntable 61, the large end 622a or the small end 622b or a certain part between the large end 622a and the small end 622b abuts against the driven member 52. When the large end 622a abuts against the driven member 52, the support foot 622 provides a first pressing force to the latch 53. At this time, the included angle between the extending axis of the driven member 52 and the rotation axis of the turntable 61 is 0.3° - 15°; when the small end 622b abuts against the driven member 52, the support foot 622 provides a second pressing force to the latch 53. At this time, the included angle between the extending axis of the driven member 52 and the rotation axis of the turntable 61 is 0° - 0.3°; when a certain part between the large end 622a and the small end 622b abuts against the driven member 52, the support foot 622 provides a third pressing force to the latch 53; the first pressing force is greater than the third pressing force, and the third pressing force is greater than the second pressing force.

[0066] Further, a plurality of protrusions 623 are arranged at intervals, and the protrusions 623 are engaged with the grooves 54 to fix the protrusions 623 to the follower 52 in a non-randomly displaceable manner. The protrusions 623 and the grooves can be set as a mating structure with a shape adaptation to meet the positioning requirements of the support feet 622. In addition, the protrusions 623 can be made into a structure with the same shape or gradually increasing sizes. When it is necessary to fix the battery pack 100 and the screwdriver 200 more tightly, the turntable 61 can be rotated. The rotation of the turntable 61 will drive the support legs 621 and the support feet 622 to rotate synchronously. The large end 622a of the support feet 622 will rotate in the direction towards the follower 52. According to the needs of the operator, any protrusion 623 on the support feet 622 can be engaged with the groove 54, so that the support feet 622 form a thrust against the follower 52, forcing the latch 53 to be pressed into the latch receiving groove 212.

[0067] In this embodiment, the latching mechanism 5 has an initial position and a deflected position. It is defined that when the battery pack 100 is connected to the screwdriver 200, that is, when the latching mechanism 5 is engaged with the battery receiving portion 207, the latching mechanism 5 is in the initial position at this time. The latching mechanism 5 has a first extension direction, and the first extension direction is parallel to the rotation axis of the turntable 61; in other embodiments, there is a small angle between the first extension direction and the rotation axis of the turntable 61. It is defined that when the adjusting mechanism 6 has a certain thrust on the latching mechanism 5, the latching mechanism 5 is in the deflected position. The latching mechanism 5 has a second extension direction, and the first extension direction intersects with the second extension direction. Further, the angular range between the first extension direction and the second extension direction is 0 - 10°.

[0068] Further, a material with a higher strength than that of the latching mechanism 5 can be selected to make the support member 62, so that the support member 62 provides a strong supporting force. In other embodiments, the material of the latching mechanism 5 is opposite to that of the support member 62, but a metal reinforcing member can be embedded in the support member 62 to enhance the overall supporting force of the support member 62 to meet the requirement of applying a thrust to the latching mechanism 5.

[0069] In addition, in order for the operator to better identify how to adjust the turntable 61, markings can be provided on the outer periphery of the turntable 61 and the outer periphery of the chassis 63 to facilitate the operator to use the adjusting mechanism 6. Optionally, a triangular marking member is provided on the turntable 61, and a symbol marking is provided on the outer periphery of the chassis 63. The symbol marking corresponds to the type of the power tool 200 or the degree of usage time; when in use, the turntable 61 is rotated so that the marking member corresponds to the symbol marking. Optionally, a symbol marking is provided on the turntable 61, and the symbol marking corresponds to the type of the power tool 200 or the degree of usage time, and a triangular marking member is provided on the chassis 63. When in use, the turntable 61 is rotated so that the marking member corresponds to the symbol marking.

[0070] In the present invention, by providing an adjusting mechanism 6 on the original battery pack 100, the adjusting mechanism 6 provides a thrust force towards the inner wall of the battery receiving portion 207 to the latching mechanism 5, so that the latch 53 is tightly connected to the latch receiving groove 212. The structure is simple and has strong compatibility. Only by adding the adjusting mechanism 6 to the battery pack 100 can the effective fixation of the latch 53 be realized, solving the wear problem during its long-term use, and there is no need to add new structures or make changes to the power tool 200; and a protrusion 623 is provided on the support leg 622 of the adjusting mechanism 6, and the protrusion 623 can engage with the groove 54 to fix the support leg 622 relative to the follower 52.

[0071] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that there are many other alternative solutions for the battery pack of the present invention without departing from the principles and scope of the present invention. The protection scope of the present invention shall be subject to the content of the claims.

Claims

1. A battery pack adapted to an electric tool to provide power, the battery pack comprising a housing and a buckle mechanism connected to the housing, the buckle mechanism being configured to mount / dismount the battery pack to / from the electric tool; characterized in that: The snap mechanism has an operating member connected to the housing, a driven member protruding upward from the operating member, and a latch disposed on one side of the driven member. The battery pack further includes an adjusting mechanism connected to the snap mechanism. The adjusting mechanism has a turntable for user operation, a support leg connected to the turntable, and a support foot protruding from the support leg toward the latch. The support foot abuts against the side of the driven member opposite to the latch.

2. The battery pack according to claim 1, characterized in that: The support foot has a relatively large end and a relatively small end. The width of the large end is greater than the width of the small end. In response to the rotation of the adjusting mechanism, the large end or the small end abuts against the driven member.

3. The battery pack according to claim 1, wherein: The snap mechanism further has a groove recessed from the driven member. The groove and the latch are respectively located on both sides of the driven member. The adjusting mechanism has a plurality of protrusions formed at the end of the support foot. The plurality of protrusions are spaced apart, and any one of the protrusions is engaged with the groove.

4. The battery pack according to claim 1, wherein: The turntable is movably connected to the housing. The adjusting mechanism has a support member connected to the turntable. The extending direction of the support member is parallel to the rotation axis of the turntable. The turntable drives the support member to rotate, driving the driven member to offset relative to the rotation axis of the turntable.

5. The battery pack according to claim 4, wherein: When the large end abuts against the driven member, the included angle between the extending axis of the driven member and the rotation axis of the turntable is 0.3° - 15°. When the small end abuts against the driven member, the included angle between the extending axis of the driven member and the rotation axis of the turntable is 0° - 0.3°.

6. The battery pack according to claim 4, wherein: The adjusting mechanism has a chassis adjacent to the housing. The turntable is rotatably connected to the chassis. The chassis has a support plate connected to the housing and an avoidance hole penetrating through the support plate. The support member passes through the avoidance hole.

7. The battery pack according to claim 4, wherein: The outer periphery of the turntable is provided with an anti-slip portion, and the turntable is located below the housing.

8. A battery pack is adapted to an electric tool to provide power. The battery pack includes a housing, a battery pack installed in the housing, a control board, and terminals connected to the control board. The terminals are connected to the electric tool to transmit the power of the battery pack. It is characterized in that: The battery pack further includes a snap mechanism connected to the housing and an adjusting mechanism connected to the snap mechanism. The snap mechanism is configured to mechanically mount / dismount the battery pack to / from the power tool. In response to the rotation of the adjusting mechanism, the adjusting mechanism applies a thrust force in a direction away from the battery pack to the snap mechanism.

9. The battery pack according to claim 8, wherein: The snap mechanism has an initial position and an offset position. When the snap mechanism is in the initial position, the snap mechanism has a first extending direction. When the snap mechanism is in the offset position, the snap mechanism has a second extending direction. The first extending direction intersects with the second extending direction.

10. The battery pack according to claim 8, characterized in that: The snap mechanism has an operating member connected to the housing, a driven member protruding upward from the operating member, a latch disposed on one side of the driven member, and a groove recessed from the driven member. The latch and the groove are respectively located on both sides of the driven member. At least a part of the adjusting mechanism presses against the groove, and in response to the rotation of the adjusting mechanism, the thrust force pushes the latch to offset toward the inner wall of the power tool.

11. The battery pack according to claim 10, wherein: Two snap mechanisms are provided. When the adjusting mechanism rotates, the minimum distance between the two snap mechanisms expands or contracts.

12. A battery system includes a power tool and a battery pack installed on the power tool. The power tool has a main body part and a handle part connected to the main body part. The insertion and removal direction of the battery pack is parallel to the extending direction of the handle part, and at least part of the battery pack is received in the handle part. The locking mechanism of the power tool is connected to the buckle mechanism of the battery pack; characterized in that: The battery pack includes an adjustment mechanism for operating the buckle mechanism. When the battery pack is inserted into the power tool, in response to the rotation of the adjustment mechanism, the buckle mechanism offsets towards the inner wall direction of the handle portion.

13. The battery system according to claim 12, wherein: The housing has a bottom case and an end cap connected to the bottom case. The bottom case surrounds the outer periphery of the end cap. The buckle mechanism is integrally injection-molded with the bottom case, and the buckle mechanism is provided on the outer periphery of the end cap. The adjustment mechanism is located between the buckle mechanism and the end cap.

14. The battery system according to claim 13, wherein: The adjustment mechanism has a turntable movably mounted on the housing and a support member connected to the turntable. The extending direction of the support member is parallel to the extending direction of the end cap.

15. The battery system according to claim 12, wherein: The material hardness of the support member is greater than the material hardness of the buckle mechanism.

16. The battery system according to claim 12, wherein: A metal reinforcement is embedded inside the support member.

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