JPH106248A - Installing mechanism of battery pack for power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at the promotion of low cost and miniaturization in a battery pack by installing a locking member, constituting a detachable button at the base end side, rotatably in the casing of a body storage part of a power tool, and locking and supporting this battery pack inserted into the body storage part, by this locking member. SOLUTION: At the time of taking out a battery pack, if a detachable button 23 is forcibly pressed in the broken-line direction against a spring 25, a locking member 2 rotates counterclockwise with a fulcrum shaft 21 as the center, an engaged part 24 is rotated in a direction separating from a bottom part 3A of the battery pack 3. Therefore, the battery pack 3 is taken out so as to be slipped out of a storage part in a holding part 1A. In addition, when this battery pack 3 is installed, the detachable button 23 is forcibly pressed as well, thereby making the engaged part 24 into a state of being drawn back, and the battery pack 3 is inserted into the internal storage part from an installing port 1C. Subsequently, the pressing motion of this detachable button 23 is released, and the engaged part 24 is pushed back clockwise by dint of the spring 25 to hold the battery pack 23 at the bottom side in a locking manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack for a power tool which accommodates a secondary battery and is removably inserted into a power tool body, and more particularly to a battery for a power tool which locks the battery pack to the power tool body. The present invention relates to a pack mounting mechanism.

[0002]

2. Description of the Related Art As a power tool, a power tool which uses a battery pack which accommodates a power supply battery and is detachable from a power tool body has been developed and used. When the power supply voltage drops, the battery pack can be taken out of the power tool main body and can be repeatedly charged by an appropriate charger.

Therefore, this electric tool is provided with a locking projection 100A on the power tool main body 100 side and a locking projection 1 on the battery pack main body 101 side, for example, as shown in FIG.
A device having a lock mechanism 102 provided with a rotatable lock claw 102A that locks at 00A has been developed. The lock claw 102 is mounted in a protruding receiving portion on the side of the battery pack main body 101. One end of the lock claw 102 is urged to rotate counterclockwise by a spring 102B, and the other end is Push button 10 for removal
2C.

[0004]

However, in the lock mechanism having such a structure, a housing portion is provided on a side portion of the battery pack main body 101 to house a lock claw or the like. In addition to the complexity, the size of the battery pack is increased, which hinders miniaturization of the battery pack and increases the manufacturing cost. In addition, there is a possibility that the end portion of the lock claw will be worn due to long-term use, resulting in poor locking operation.

[0005] In addition, since the battery pack is used for a certain period of time, and charging and discharging are repeatedly performed, the charging efficiency is reduced. That is, the battery pack is a consumable that is discarded and replaced with a new one. It is rational to reduce the cost of a battery pack that is replaced many times rather than the power tool body that continues, and reducing the manufacturing cost of the battery pack is an important issue.

In view of the above circumstances, the present invention provides a battery pack mounting mechanism for a power tool that can minimize the manufacturing cost and size of the battery pack and that can be easily attached to and detached from the power tool. Is what you do.

[0007]

That is, the present invention according to claim 1 is a battery pack of a power tool which accommodates a secondary battery and is detachably mounted on a main body of the power tool. A lock member whose base end side constitutes a detachable button is rotatably mounted on a casing of a main body mounting portion of the power tool to which the power tool is mounted, and a substantially L-shaped locking portion formed on a distal end side of the lock member is used for the lock member. The battery pack inserted into the main body mounting portion is fixedly supported from below.

[0008]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a mounting mechanism for a battery pack for a power tool according to a first embodiment of the present invention.
The holding hole 1B (see FIG. 2) provided in the grip portion 1A (the lower side of the inside also serves as a housing portion for the battery pack 3) 1A is substantially L-shaped.
A lock member 2 having a character shape is rotatably mounted.

As shown in FIG. 2, the lock member 2 is formed in a thin plate shape that can swing around the fulcrum shaft 21 toward the inside and outside of the housing portion. A stopper 22 is provided to be locked to the inner wall of the grip 1A. A portion of the lock member 2 near the fulcrum shaft 21 constitutes a detachable button 23 for pressing the battery pack 3 for attachment and detachment, and is further folded just 90 degrees at the tip end opposite to the base end. A locking portion 24 that is bent and extends in the horizontal direction and supports the battery pack 3 from the bottom surface 3A side is formed. Note that the lock member 2 is provided with the detachable button 23.
A spring 25 is provided in the mounting hole 1B between the back side and the grip 1A corresponding to the above, and the stopper 22 of the lock member 2 is pressed against the inner wall of the grip 1A by the elastic force of the spring 25.

Therefore, according to this embodiment, in FIG. 2, when the detachable button 23 is pressed in the direction of the broken line against the elastic force of the spring 25, the lock member 2 moves counterclockwise around the fulcrum shaft 21. Then, the locking portion 24 rotates in a direction away from the bottom 3A of the battery pack 3. Thereby, the battery pack 3 (where nothing else is held from below)
The battery pack 3 can be easily taken out because it can escape naturally by being pulled out of the accommodation portion inside the grip portion 1A by its own weight.

When the user wants to mount the battery pack 2, he pushes the detachable button 23 in the direction of the broken line against the elastic force of the spring 25, and withdraws the locking portion 24 from the mounting opening 1C below the grip portion 1A. During this operation, the battery pack 3 may be inserted from the fully opened mounting opening 1C into the internal housing.

After the battery pack 3 is inserted in this way, when the pressing operation of the attaching / detaching button 23 is released, the spring 2
The locking portion 24 is pushed back clockwise by the elastic force of 5, and the battery pack 3 can be firmly fixed on the bottom side.

[0013]

As described above, according to the present invention, a lock member whose base end side constitutes a detachable button is rotatably mounted on a casing of a main body mounting portion of a power tool to which a battery pack is mounted, The battery pack inserted into the main body mounting portion is fixedly supported from below by a substantially L-shaped locking portion formed on the distal end side of the lock member. Since there is no costly mechanism part, and the detachable mechanism is installed only on the power tool side that is used for a long time, the manufacturing cost and size of the battery pack can be effectively reduced, and the battery pack can be used for a long time. Is both economical and rational.

[Brief description of the drawings]

FIG. 1 is a plan view showing a power tool to which a mounting mechanism according to an embodiment of the present invention is applied.

FIG. 2 is an enlarged sectional view of a main part showing the mounting mechanism shown in FIG. 1;

FIG. 3 is an explanatory view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power tool main body 2 Lock member 23 Detachable button 24 Lock part 3 Battery pack

Claims (1)

[Claims] 1. A battery pack for a power tool which accommodates a secondary battery and is removably mounted on a main body of a power tool, wherein the battery pack is mounted on a casing of a main body housing portion of the power tool. A lock member whose side constitutes a detachable button is rotatably mounted, and the battery pack inserted into the main body housing portion is fixedly supported from below by a substantially L-shaped locking portion formed on the distal end side of the lock member. A battery pack mounting mechanism for a power tool.