Battery pack release structure

Abstract

The present invention provides a battery pack release structure, which includes a battery pack seat having a battery pack installation cavity, a battery pack inserted into the battery pack installation cavity, a release button and a release knob connected to the battery pack seat. After pressing the release button downward, the release knob is synchronously driven to rotate relative to the battery pack seat to fix or release the battery pack. The release button includes a pressing portion and a pushing portion extending downward from the pressing portion. The pushing portion is provided with a contact surface in contact with the release knob, and the contact surface is an inclined surface; the release knob includes a rotating block cooperating with the pushing portion, and the inner wall surface of the rotating block is tangent to the contact surface of the pushing portion. Compared with the prior art, the battery pack release structure of the present invention not only realizes single-finger release, but also has a large limiting force, which can effectively prevent falling off and prevent vibration ejection.

Description

Technical Field

[0001] The present invention relates to a battery pack release structure and belongs to the field of gardening tools. Background Art

[0002] Most of the battery pack release structures used in existing power tools are rotary or press-and-translate types. However, when using the rotary release button, due to the large limiting force, two fingers are required to press for release. At the same time, since it extends too much out of the battery pack cavity, during the drop test, the release button is easily damaged by impact. While the press-and-translate release button can achieve single-finger release, its limiting force is insufficient. When power tools such as chain saws are working, due to the large vibration of the machine body, the limit will be too narrow, prone to slipping or self-bouncing and falling off.

[0003] In view of this, it is indeed necessary to improve the existing battery pack release structure to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery pack release structure that can not only be released with a single finger, but also has a large limiting force and will not produce slipping or self-bouncing and falling-off phenomena.

[0005] To achieve the above purpose, the present invention provides a battery pack release structure, which includes a battery pack seat provided with a battery pack installation cavity and a battery pack inserted into the battery pack installation cavity. A plug seat is correspondingly provided in the battery pack seat, and the battery pack is connected to the plug seat. The battery pack release structure further includes a release button and a release knob connected to the battery pack seat. After pressing the release button downward, the release knob is synchronously driven to rotate relative to the battery pack seat to fix or release the battery pack. The release button includes a pressing portion and a pushing portion extending downward from the pressing portion. The pushing portion is provided with a contact surface that contacts the release knob, and the contact surface is an inclined surface. The release knob includes a rotating block that cooperates with the pushing portion, and the inner wall surface of the rotating block is tangent to the contact surface of the pushing portion.

[0006] As a further improvement of the present invention, the end of the rotating block is elliptically arranged, and the shortest diameter of this end is between 2 and 7 mm, and the longest diameter is between 6 and 17 mm.

[0007] As a further improvement of the present invention, an angle is formed between the contact surface and the longitudinal axis of the release knob, and the angle is 16 to 28 degrees.

[0008] As a further improvement of the present invention, the release knob further includes a pivot portion hinged to the battery pack seat. The rotating block extends obliquely away from the battery pack installation cavity from the bottom end of the pivot portion. A locking bolt is further provided at the bottom end of the pivot portion, and the locking bolt extends obliquely toward the battery pack installation cavity to fix or release the battery pack.

[0009] As a further improvement of the present invention, a receiving groove is formed in the rotating block, and the pushing portion protrudes into the receiving groove and makes the contact surface contact with the inner wall surface of the rotating block to drive the rotating block to rotate. The length of the pushing portion protruding into the receiving groove is 14-22 mm.

[0010] As a further improvement of the present invention, the battery pack seat includes an upper cover and a base assembled up and down. The insertion piece seat is arranged at the bottom of the base. The upper cover is provided with a through groove for the pressing portion to protrude. The cross section of the through groove is stepped to limit the pressing stroke of the pressing portion.

[0011] As a further improvement of the present invention, the pressing stroke of the pressing portion is between 3 and 8 mm.

[0012] As a further improvement of the present invention, a first elastic member is provided on the release button to drive the release button to reset after the release button is released; a second elastic member is provided on the release knob to drive the release knob to reset after the release knob is released.

[0013] As a further improvement of the present invention, the first elastic member is a compression spring or a spring piece.

[0014] As a further improvement of the present invention, the second elastic member is a torsion spring or a spring piece.

[0015] The beneficial effects of the present invention are as follows: When the release button of the battery pack release structure of the present invention is pressed downward, the release knob can be driven to rotate synchronously, so that the release knob rotates relative to the battery pack seat to fix or release the battery pack; at the same time, the contact surface of the pushing portion is set to be tangent to the inner wall surface of the rotating block, which not only realizes single-finger release, but also has a large limiting force, and can effectively prevent falling off and vibration ejection. Description of the Drawings

[0016] Figure 1 is a perspective view of the battery pack release structure of the present invention.

[0017] Figure 2 is Figure 1 an exploded view of the battery pack release structure shown.

[0018] Figure 3 is Figure 2 an exploded view of the battery pack seat in.

[0019] Figure 4 is Figure 3 another perspective exploded view of the battery pack seat shown.

[0020] Figure 5 is Figure 2Stereogram of the middle insert seat.

[0021] Figure 6 is Figure 2 Structural diagram when the middle release button and the release knob cooperate with each other.

[0022] Figure 7 is Figure 6 Exploded view of

[0023] Figure 8 is Figure 7 Schematic diagram from another angle of

[0024] Figure 9 is to Figure 6 Cross-sectional view when the first elastic member in

[0025] Figure 10 is to Figure 6 Cross-sectional view when the second elastic member in

[0026] Figure 11 Cross-sectional view when the battery pack release structure of the present invention is in the locked state.

[0027] Figure 12 is Figure 11 Enlarged view of the circled part in

[0028] Figure 13 Cross-sectional view when the battery pack release structure of the present invention is in the released state.

[0029] Figure 14 is Figure 13 Enlarged view of the circled part in

[0030] Figure 15 Cross-sectional view when the battery pack release structure of the present invention is in the free state.

[0031] Figure 16 is Figure 15 Enlarged view of the circled part in

[0032] Figure 17 is Figure 2 Exploded view of the pop-up structure in Detailed implementation manner

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] As Figure 1 and Figure 2As shown, the present invention discloses a battery pack release structure 100, which includes a battery pack seat 10 provided with a battery pack installation cavity 101 and a battery pack 20 inserted into the battery pack installation cavity 101. A socket seat 30 is correspondingly provided in the battery pack seat 10, and the battery pack 20 is connected to the socket seat 30. The battery pack release structure 100 of the present invention can be applied to DC-powered garden tools such as chain saws, lawn mowers, lawn trimmers, and blowers.

[0035] As Figure 3 shown in Figure 4 As shown, the battery pack seat 10 includes an upper cover 11 and a base 12 assembled up and down. The battery pack installation cavity 101 is formed by enclosing the upper cover 11 and the base 12, and the socket seat 30 is arranged at the bottom of the base 12. An opening 111 is provided at the top of the upper cover 11, and the opening 111 is communicated with the battery pack installation cavity 101. After the upper cover 11 and the base 12 are installed, the battery pack 20 can be directly inserted and removed in the battery pack installation cavity 101 from the opening 111.

[0036] As Figure 5 shown in

[0037] As Figures 6 to 10 shown in Figure 2 and combined with Figure 4 As shown, the battery pack release structure 100 further includes a release button 40 and a release knob 50 assembled and connected to the battery pack seat 10. After the release button 40 is pressed downward, the release knob 50 will be synchronously driven to rotate relative to the battery pack seat 10 to fix or release the battery pack 20.

[0038] Specifically, the release button 40 includes a pressing portion 41, a pushing portion 42 extending vertically downward from the pressing portion 41, and a first elastic member 43 for driving the release button 40 to reset. The pressing portion 41 protrudes beyond the upper surface of the upper cover 11 for the convenience of the operator to operate. Preferably, the upper cover 11 is provided with a through groove 112 for receiving the release button 40. The through groove 112 is divided into two parts. One part is used to receive the pressing portion 41 and facilitate the protrusion of the pressing portion 41, and the other part is used to receive and limit the pushing portion 42. Since the size of the pressing portion 41 is larger than that of the pushing portion 42, the cross-section of the through groove 112 is generally in a stepped shape.

[0039] A receiving cavity 411 is formed at the connection between the pressing part 41 and the pushing part 42, and the first elastic member 43 is received in the receiving cavity 411 so as to drive the release button 40 to reset after the release button 40 is released. In this embodiment, the first elastic member 43 is a compression spring; of course, the first elastic member 43 can also be a spring piece (such as Figure 9 ) or other devices capable of performing a reset function, which is not limited herein.

[0040] The cross-section of the through groove 112 is arranged in a stepped shape, which has two advantages: 1. It can control the downward pressing stroke of the pressing part 41 to be not less than 3 mm, so that the release button 40 has an obvious movement trend during the process of releasing the battery pack 20, enabling the user to perceive the difference between pressing and not pressing, and thus meeting the safety regulations for device use; preferably, the pressing stroke of the release button 40 is between 3 and 8 mm (preferably 5 mm or 6 mm). At this time, not only can the requirements of safety regulations be met, but also the requirements for the compression spring 43 are relatively low, reducing the size of the entire release button 40 and avoiding the poor user experience caused by an overly long stroke. 2. It is convenient for the release button 40 to reset; after the release button 40 is assembled to the battery pack seat 10, the top of the compression spring 43 abuts against the pressing part 41, and the bottom of the compression spring 43 abuts against the inner side wall of the through groove 112. Thus, after the pressing part 41 completes pressing, the compression spring 43 is compressed, and after the pressing on the pressing part 41 is cancelled, the entire release button 40 will be driven by the compression spring 43 to reset.

[0041] The pushing part 42 is provided with a first contact surface 421 and a second contact surface 422 that are in contact with the release knob 50. The first contact surface 421 is arranged in a hollowed-out shape, and the second contact surface 422 is an inclined surface. The first contact surface 421 being arranged in a hollowed-out shape means that the pushing part 42 is provided with a plurality of grooves 423 that are recessed inward from the first contact surface 421, and reinforcing ribs 424 are formed between adjacent two grooves 423, and the outer wall surfaces of these reinforcing ribs 424 are coplanar with the first contact surface 421. Designed in this way, a hollowed-out effect is formed.

[0042] The first contact surface 421 is designed to be hollowed out mainly because: the release button 40 is usually made of plastic. If the pushing part 42 is a solid body, it will be deformed after repeated use; if the pushing part 42 is a pure hollow structure, there will be a problem of insufficient structural strength. Therefore, setting a plurality of reinforcing ribs 424 can solve the problem of deformation and at the same time increase the structural strength of the pushing part 42, killing two birds with one stone.

[0043] On the left and right sides of the pushing part 42, limiting ribs 425 are further provided. The bottom of the limiting ribs 425 is connected to the outer wall surface of the pushing part 42, and the top is elastically suspended. It can be used to limit the pressing stroke of the release button 40 in the battery pack seat 10 and the reset stroke of the release button 40 in the battery pack seat 10 after being pressed. The setting of the limiting ribs 425 enables the release button 40 to still have a good limiting effect after multiple reciprocating motions; correspondingly, a matching part (not shown) that matches the limiting ribs 425 is provided on the inner side wall of the upper cover 11. This matching part can be a boss or a clamping groove, mainly used to prevent the stroke of the release button 40 from changing due to the deformation of the limiting ribs 425 after fatigue. The optimal angle between the limiting ribs 425 and the outer wall surface of the pushing part 42 is 20 degrees.

[0044] The release knob 50 includes a pivoting part 51 hinged on the battery pack seat 10, locking bolts 52 and a rotating block 53 that respectively extend obliquely to the left and right sides from the bottom end of the pivoting part 51. The pivoting part 51 is arranged in an axial shape and can be used as a rotating shaft. The limiting ribs 425 are arranged on both sides of the pushing part 42 along the axis of the pivoting part 51. The locking bolts 52 extend obliquely from the bottom end of the pivoting part 51 towards the side of the battery pack installation cavity 101 until the locking bolts 52 protrude into the battery pack installation cavity 101. At this time, the locking bolts 52 can be used to fix or release the battery pack 20. The rotating block 53 extends obliquely from the bottom end of the pivoting part 51 towards the side away from the battery pack installation cavity 101 and is used to cooperate with the pushing part 42 of the release button 40. Thus, driven by the pushing part 42, the release knob 50 can rotate relative to the battery pack seat 10.

[0045] A receiving groove 531 is formed in the rotating block 53. The pushing part 42 protrudes into the receiving groove 531, and the first contact surface 421 contacts the pivoting part 51, and the second contact surface 422 contacts the inner wall surface of the rotating block 53, so as to drive the rotating block 53 to rotate. Preferably, the best contact between the inner wall surface of the rotating block 53 and the second contact surface 422 of the pushing part 42 is in a state of being tangent throughout. Based on this, the end of the rotating block 53 is designed to be elliptical, and the shortest diameter R of this end 3 is between 2 and 7 mm, the longest diameter R 2 is between 6 and 17 mm, the inclination angle α of the second contact surface 422 (that is, the angle between the second contact surface 422 and the longitudinal axis of the release knob 50) is 16 to 28 degrees, and the length S of the pushing part 42 protruding into the receiving groove 531 1 is 14 to 22 mm, as specifically shown in Figure 9 shown. The test conditions after different size combinations can be referred to Table 1 below, where the operating conditions refer to the cooperation between the release knob 50 and the release button 40 when the release button 40 is pressed multiple times.

[0046] Comparison of Experimental Data on Operation Freezing in Table 1

[0047]

[0048]

[0049] As can be seen from Table 1 above: When the inclination angle α of the second contact surface 422 is 20 degrees, the longest diameter R 2 is 8 mm, the shortest diameter R 3 is 3 mm, and S 1 is 17 mm, the cooperation effect between the release knob 50 and the release button 40 is the best.

[0050] The release knob 50 has three working states: a locked state, a released state, and a free state. As Figure 11 shown in Figure 12 , in the locked state, the locking bolt 52 cooperates with the limiting structure 21 on the battery pack 20 (see Figure 2 ) to be fixed, thereby locking the battery pack 20 in the battery pack installation cavity 101. At this time, the included angle between the locking bolt 52 and the longitudinal axis of the release knob 50 is the first included angle θ 1 ; as Figure 13 shown in Figure 14 , in the released state, the release button 40 is pressed down to the bottommost end, the locking bolt 52 is in a tightened state and disengages from the limiting structure 21. At this time, the included angle between the locking bolt 52 and the longitudinal axis of the release knob 50 is the second included angle θ 2 ; as Figure 15 shown in Figure 16 , in the free state, the battery pack 20 is detached from the battery pack installation cavity 101, the release button 40 is no longer pressed, and the release knob 50 is in the free state. At this time, the included angle between the locking bolt 52 and the longitudinal axis of the release knob 50 is the third included angle θ 3 ; the third included angle θ 3 is greater than the first included angle θ 1 , and the first included angle θ 1 is greater than the second included angle θ 2 .

[0051] Preferably, the limiting structure 21 is a limiting boss, and the first included angle θ 1 is between 30 and 42 degrees; the second included angle θ 2 is between 15 and 26 degrees; the third included angle θ 3 is between 40 and 52 degrees. Based on the lever principle, when the release knob 50 switches between the locked state, the released state, and the free state, the rotation radius R 1 of the locking bolt 52 is 12 to 24 mm.

[0052] The end of the locking bolt 52 is formed with an engaging surface 521 that cooperates with the limiting boss 21 on the battery pack 20. The engaging surface 521 is an arc surface, and the radian β of this arc surface is between 8 and 20 degrees, so as to ensure that the engaging surface 521 of the locking bolt 52 will not get stuck during the rotation process when cooperating with the limiting boss 21. The specific experimental data and states are shown in Table 2 below. The damage conditions in Table 2 represent the structural stability after multiple test collisions, and the locking conditions represent the locking situation of the release button 40 and the release knob 50 on the battery pack 20.

[0053] Table 2 Comparison of Experimental Data

[0054] Structure <![CDATA[θ 1 (degrees)]]> <![CDATA[θ 2 (degrees)]]> <![CDATA[θ 3 (degree)]]> β (degrees) <![CDATA[R 1 (mm)]]> Damage condition Locking condition 1 30 15 40 8 12 Poor Poor 2 32 16 42 10 14 Average Average 3 35 18 45 12 16 Good Good 4 37 20 47 14 18 Average Average 5 39 22 48 16 20 Poor Poor 6 40 24 50 18 22 Poor Poor 7 42 26 52 20 24 Poor Poor

[0055] As can be seen from Table 2 above: The optimal value of the first included angle θ 1 is 35 degrees, the optimal value of the second included angle θ 2 is 18 degrees, the optimal value of the third included angle θ 3 is 45 degrees, the optimal rotation radius R 1 of the locking bolt 52 is 16 mm, and the optimal radian β of the engaging surface 521 of the locking bolt 52 is 12 degrees. At this time, the structural stability of the release knob 50 and the release button 40 is the best, and the locking situation of the battery pack 20 is the optimal.

[0056] A second elastic member 54 is provided on the release knob 50. The second elastic member 54 is used to drive the release knob 50 to reset after the release knob 50 is released. In this embodiment, the second elastic member 54 is a torsion spring, including a fixing portion 541 sleeved on the pivot portion 51, a first abutting portion 542 extending from the fixing portion 541 to contact the lower surface of the locking bolt 52, and a second abutting portion 543 extending from the fixing portion 541 to abut against the upper cover 11. When the release knob 50 rotates relative to the battery pack seat 10, the first abutting portion 542 is compressed.

[0057] There are two fixing portions 541, and they are respectively sleeved on both ends of the pivot portion 51; the first abutting portion 542 connects the two fixing portions 541, so as to compress the first abutting portion 542 and synchronously drive the elastic deformation of the two fixing portions 541 when the locking bolt 52 rotates; there are also two second abutting portions 543, and they respectively abut against the inner side walls of the upper cover 11, providing a supporting force for the elastic deformation and elastic reset of the torsion spring 54. Of course, in other embodiments, the second elastic member 54 can also be a spring sheet (such as Figure 10 ) or other devices that can achieve the reset function, which is not limited here.

[0058] Such as Figure 2 、 Figure 4 and Figure 17As shown, the battery pack release structure 100 further includes a pop-up structure 60 located at the bottom of the base 12 and near the insert seat 30. The pop-up structure 60 includes a pop-up compression spring 61 and a spring seat 62 covering the outside of the pop-up compression spring 61. There are two pop-up compression springs 61, which are simultaneously received in the limit cavity 121 at the bottom of the base 12. The spring seat 62 covers the tops of the two pop-up compression springs 61 and cooperates with the inner side wall of the limit cavity 121.

[0059] After the battery pack 20 is inserted into the battery pack installation cavity 101, the battery pack 20 will press down the pop-up structure 60, compressing the pop-up compression spring 61. At this time, the release knob 50 will fix the battery pack 20 by the cooperation of the locking bolt 52 and the limit boss 21. When it is necessary to take out the battery pack 20, press down the release button 40, so that the release button 40 drives the release knob 50 to rotate relative to the battery pack seat 10 until the locking bolt 52 disengages from the limit boss 21. Then the battery pack 20 will pop out under the reaction force of the pop-up compression spring 61 and the spring seat 62. Finally, release the release button 40, and under the action of the first elastic member 43, the release button 40 returns to its original position. At the same time, the release knob 50 rotates in the reverse direction and returns to its original position under the action of the second elastic member 54, realizing the function of releasing the battery pack 20 with a single finger.

[0060] In summary, when pressing down the release button 40 of the battery pack release structure 100 of the present invention, the release knob 50 can be driven to rotate synchronously, so that the release knob 50 rotates relative to the battery pack seat 10 to fix or release the battery pack 20. It not only realizes single-finger release, but also increases the limiting force of the release button 40 and the release knob 50, which can effectively prevent falling off and vibrating out.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A battery pack release structure, comprising a battery pack seat having a battery pack installation cavity and a battery pack inserted into the battery pack installation cavity. A plug seat is correspondingly provided in the battery pack seat, and the battery pack is connected to the plug seat. Characterized in that: The battery pack release structure further includes a release button and a release knob connected to the battery pack seat. After pressing the release button downward, the release knob is synchronously driven to rotate relative to the battery pack seat to fix or release the battery pack. The release button includes a pressing portion and a pushing portion extending downward from the pressing portion. The pushing portion is provided with a contact surface in contact with the release knob, and the contact surface is an inclined surface. The release knob includes a rotating block cooperating with the pushing portion and a pivoting portion hinged to the battery pack seat. The rotating block extends obliquely away from the battery pack installation cavity from the bottom end of the pivoting portion. A receiving groove is formed in the rotating block. The pushing portion protrudes into the receiving groove and makes the inner wall surface of the rotating block tangent to the contact surface of the pushing portion to drive the rotating block to rotate. A locking bolt is further provided at the bottom end of the pivoting portion, and the locking bolt extends obliquely toward the battery pack installation cavity to fix or release the battery pack.

2. The battery pack release structure according to claim 1, Characterized in that: The end of the rotating block is elliptically arranged, and the shortest diameter of this end is between 2 and 7 mm, and the longest diameter is between 6 and 17 mm.

3. The battery pack release structure according to claim 1, Characterized in that: An angle is formed between the contact surface and the longitudinal axis of the release knob, and the angle is 16 to 28 degrees.

4. The battery pack release structure according to claim 1, Characterized in that: The pushing portion is provided with a first contact surface and a second contact surface in contact with the release knob. The first contact surface is in contact with the pivoting portion, and the second contact surface is in contact with the inner wall surface of the rotating block. The length of the pushing portion protruding into the receiving groove is 14 to 22 mm.

5. The battery pack release structure according to claim 1, Characterized in that: The battery pack seat includes an upper cover and a base assembled up and down. The plug seat is arranged at the bottom of the base. The upper cover is provided with a through groove for the pressing portion to protrude. The cross section of the through groove is stepped to limit the pressing stroke of the pressing portion.

6. The battery pack release structure according to claim 5, Characterized in that: The pressing stroke of the pressing portion is between 3 and 8 mm.

7. The battery pack release structure according to claim 1, Characterized in that: A first elastic member is provided on the release button to drive the release button to reset after releasing the release button; a second elastic member is provided on the release knob to drive the release knob to reset after releasing the release knob.

8. The battery pack release structure according to claim 7, Characterized in that: The first elastic member is a compression spring or a spring sheet.

9. The battery pack release structure according to claim 7, Characterized in that: The second elastic member is a torsion spring or a spring sheet.

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