JPH0973890A - Battery case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the operation of attaching or removing a battery case to or from a motor-driven tool with good controllability. SOLUTION: Hook buttons 12 are stored in spaces between a frame part 9 and an interior wall 8 which project outward on the right and left of the lower cover 2 of a battery case 1. Each hook button 12 comprises an inclined finger grip 13, side edges 14, 14 serving as stoppers in the outward direction, and an upper end 15, the side edges 14, 14 having at their lower ends support legs 16, 16 serving as fulcrums of oscillation, the upper end 15 having a hook 17. Between the hook button 12 and the interior wall 8, a plate spring 18 which is given elasticity by a center short abutting piece 19 and by both right and left curved pieces 20, 20 is interposed by a cut in one end and is inserted between the frame part 9 and the interior wall 8 with the other uncut end 18a down, and the abutting piece 19 is made to abut to the interior wall 8 while the curved pieces 20, 20 abuts to the back of the finger grip 13, so that the hook button 12 is pressed against the frame part 9.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention has a built-in storage battery,
The present invention relates to a battery case that is detachably attached to a handle or the like of an electric tool.

[0002]

2. Description of the Related Art As a conventional battery case, actual fairness 3-
Those disclosed in Japanese Patent No. 21906 are listed. This is equipped with an electrode terminal plate above a case that stores a plurality of storage batteries and electrically connected by being held by a terminal metal fitting inside the handle when the power tool is attached to the handle. A hook button that is locked to a locking portion provided on the housing is provided by urging the hook button outward by a spring.By pushing the hook button inward against the urging of the spring, The battery case can be removed from the housing by disengaging the hook and the engaging portion.

[0003]

However, in the above-mentioned conventional battery case, the hook button when mounted is locked in a posture in which it is substantially flush with the housing. The structure is such that the hook cannot be disengaged from the locking portion unless it is pushed into. Therefore, the push-in operation of the hook button requires a work in which the fingertip is surely applied to the hook button and the push-in operation is performed with a relatively large force, and the operability is not good.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a battery case which can be removed from the housing with good operability, and has a structure in which the hook button is attached to a locking portion of the housing. In the locked state, it is provided so as to be inclined so as to move away from the case as it approaches the housing side. Further, the biasing means is provided with elasticity by alternately bending one end separated by a slit, and the other end is provided on the hook button and the case in a direction opposite to a mounting direction to the housing. It may be a leaf spring interposed between the inner wall and the inner wall.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a battery case 1
Is a synthetic resin product in which the ridge portion 3a of the upper cover 3 is fitted to the inner circumference of the strip portion 2a of the lower cover 2 and the two covers are ultrasonically welded together to form a single unit. ，
1a ... Is built in. Also, above the upper cover 3,
A protrusion 4 for one storage battery is formed, and positive and negative electrode terminal plates 5 and 6 and a thermo terminal plate 7 connected to a thermostat are provided at the upper end of the protrusion 4, and the handle of an electric tool is provided. When mounted on the housing, the electrode terminal plate 5,
6 are respectively gripped by terminal fittings in a handle housing, which will be described later, to be electrically connected. On the other hand, the left and right sides of the lower cover 2 are provided with an inner wall 8 and a U-shaped frame portion 9 protruding outward. The frame portion 9 has an arcuate portion 1 that is formed in an inclined shape and projects outward as it goes upward.
0 and a vertical portion 11 which is continuous with the arcuate portion 10 and which projects farthest from the inner wall 8. The projecting frame portion 9
The hook button 12 is housed in a space between the inner wall 8 and the inner wall 8. As shown in FIG. 2, the hook button 12 has a finger contact portion 13 that substantially matches the inclination of the arcuate portion 10 and both sides of the finger contact portion 13 that are in contact with the back side of the frame portion 9 and the hook button 12. Side edge portions 14 and 14 serving as stoppers to the outside of 12.
And an upper end portion 15 which is vertically erected from the inside of the upper part of the finger contact portion 13, and the side edge portions 14 and 14 respectively extend downward and serve as swing fulcrums when the hook button 12 is set. The upper legs 15 of the supporting legs 16 and 16 are respectively formed with hooks 17 on the outer side. In particular, this support leg 16, 16
To the step portion 9a provided along the U-shaped inner edge on the back surface of the frame portion 9 as shown in FIGS.
Since it is fitted with 14, the hook legs 12 can be swung by placing the support legs 16 and 16 on the stepped portion 9a simply by inserting the hook button 12 between the frame portion 9 and the inner wall 8. A simple configuration is adopted. Further, the finger contact portion 13 is formed in a slightly concave shape so as to improve the feeling when the hook button 12 is pushed. Further, a leaf spring 18 is interposed between the hook button 12 and the inner wall 8. The leaf spring 18 is formed by cutting one end side of a rectangular metal plate into three pieces, and is provided with elasticity by a short contact piece 19 in the center and bending pieces 20, 20 on both left and right sides. Insert the other end portion 18a side, which is not inserted, into the space between the frame portion 9 and the inner wall 8 with the other end portion 18a side down, the contact piece 19 side to the inner wall 8, and the bending pieces 20 and 20 of the finger contact portion 13 of the hook button 12. The hook buttons 12 are brought into contact with the back surfaces, respectively, that is, the frame buttons 9
It is urged to the pressed state against. 3b, 3b
Are projectingly provided on both right and left sides of the upper cover 3, and are fitted to the lower cover 2 and are fitted above the frame portion 9 so that the hook button 12 is formed.
Is a retaining portion that serves as a stopper to the upper side of the.

[0006] The battery case 1 configured in this way
When the upper cover 3 is inserted into the handle housing 21 when it is mounted on an electric power tool, the locking portions 2 provided on the left and right lower ends of the handle housing 21 face each other.
When the hooks 17, 17 on the side of the battery case 1 come into contact with 2, 22 and are further pushed in, the hook buttons 12 resist the urging force of the leaf springs 18 by the taper formed on the contacting portions between the hooks 12, 17. Each of them swings inward with 16 as a fulcrum, and then the hooks 17 are locked to the locking portions 21, respectively. Therefore, the battery case 1 has the handle housing 21.
Electrode terminal plate 5, which is mounted on
6 is gripped by the terminal fittings 23, 23 to be electrically connected (FIGS. 2 and 4). Then, when the battery case 1 is removed, as shown in FIG. 5, if the fingers are pressed against the finger contact portions 13, 13 of the hook buttons 12, 12 and are pushed inward, the hooks 17, 17 are engaged with the hooks 17, 17 contrary to the above mounting. Although the engagement with the portions 21 and 21 is released, it can be detached from the handle housing 21, but when the hook buttons 12 and 12 are attached to the handle housing 21, the finger contact portions 13 and 13 are moved to the handle housing 21 side. Since it is in an inclined posture in which it moves away from the lower cover 2 as it approaches, it is an operation of gripping and pushing in the finger rest 13 provided with this angle from the lower side of the lower cover 2. It is easy to apply force, and the hook 17 can be easily removed with a small force. In other words, the finger rests 13, 1
It is not necessary to surely apply the fingertip to 3, and the pushing operation can be easily performed even when the finger pad is attached. Further, here, by adopting the leaf spring 18 as the urging means, an outward urging force can be easily obtained by a simple bending process, and the other end portion 18a which is not cut is also attached to the frame portion 9 Since it does not rattle just by inserting it into the lower cover, the structure can be simplified and the cost can be suppressed.In addition, the leaf spring can be attached to the lower cover by bending the lower end of the insertion part as in the past and bending it. There is no need for a device to hold it without rattling. Therefore, the other end portion 18a can be shortened as much as possible, and the position of the bending piece 20 that obtains elasticity can be set relatively to the lower side of the lower cover 2, and the position of the hook button 12, that is, the finger contact portion 13 can be set. By lowering the position, the operability of the pushing operation can be improved. Further, in particular, since the elasticity is obtained by the two pieces of the contact piece 19 and the bent piece 20, a double displacement amount can be obtained with the same external force as compared with a normal single leaf spring. In other words, since the structure is such that the necessary biasing force can be obtained even if it is small, the leaf spring can be compactly formed, and it is in line with the intention to lower the position of the hook button 12 described above.

The shape of the hook button and the angle of inclination to the outside are not limited to those in the above embodiment, and other means such as a coil spring or the like can be adopted as the biasing means other than the leaf spring.

[0008]

As described above, according to the present invention, since the hook button is provided in the inclined posture, the hook button can be easily pushed in and the battery case can be removed with good operability. Further, if the biasing means is the leaf spring, the structure is simple and the cost is low, and the position where elasticity is obtained can be set relatively below the battery case, which leads to downsizing. Therefore, the position of the hook button can be set low, and the pushing operation can be performed more easily.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a battery case.

FIG. 2 is an explanatory view showing a mounting state of a battery case on a handle housing.

FIG. 3 (A) is an explanatory view showing a state where the hook button is attached to the lower cover. (B) It is an explanatory view of the frame portion to which the hook button is attached as seen from the back side.

FIG. 4 is an explanatory view showing a state where the battery case is attached to the handle housing.

FIG. 5 is an explanatory view showing a state where the battery case is removed from the handle housing.

[Explanation of symbols]

1 ... Battery case, 2 ... Lower cover, 3 ... Upper cover, 8 ... Inner wall, 9 ... Frame part, 10 ... Arc-shaped part, 11
..Vertical part, 12..hook button, 13..finger contact part, 14..side edge part, 15..upper end part, 16..supporting leg, 17..hook, 18..leaf spring, 21 ..・ Handle housing, 22 ・ ・ Locking part.

Claims (2)

[Claims] 1. A case containing a storage battery is biased outward by a biasing means, and when a power tool is mounted on a housing, the case and the housing are locked by a locking portion provided on the housing. A battery case having a hook button that is integrated and is detached from the locking portion by a pressing operation when the hook button is locked to the locking portion of the housing. Then, the battery case is provided so as to be inclined so as to move away from the case as it approaches the housing side. 2. The biasing means is elastically imparted by alternately bending one end portion separated by a slit, and the other end portion is directed in a direction opposite to a mounting direction to the housing and the hook button is provided. The battery case according to claim 1, wherein the battery spring is a leaf spring that is interposed between the inner wall and the inner wall of the case.