JPH0321906Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a latch bar holding structure for a storage battery assembly of a rechargeable electric device, which has a structure in which the main body and the storage battery assembly can be detached and separated.

For rechargeable battery devices that are used under relatively large loads, such as rechargeable battery tools, in order to increase the usage time, the storage battery assembly is designed to be detachable from the main body, and a spare storage battery assembly is prepared and replaced. An increasing number of devices are adopting the method of using
Hereinafter, this type of method will be referred to as a cassette method.

FIGS. 1 and 2 show an example of a battery-powered tool employing a cassette method. In the figure, reference numeral 1 denotes a tool body in which a motor, a speed reduction mechanism, etc. are built-in. 2
1 is a storage battery assembly containing a storage battery, terminals, etc., and is constructed to be detachable from the main body 1. The cassette system has the advantage that if the capacity of the storage battery decreases during use, it can be used continuously by preparing a spare storage battery assembly and replacing it. becomes a big problem.

FIGS. 3, 4, and 5 show a conventional method of attaching a storage battery assembly to the main body. Figure 3 is a cross-sectional view of a conventional storage battery assembly mounted on the main body; Figure 4;
FIG. 5 is a partially enlarged view of the mounting device portion.

In FIG. 4, the main body 1 and the storage battery assembly 2 are composed of a rib 1a provided on the main body 1 and a latch bar 6.
It is held by a hook portion 6b. The latch bar 6 also has a shaft provided at the rotation center 6c of the latch bar 6, and a groove 5 provided in the storage battery case 5.
a, the protruding window wall 4a of the storage battery case 4, and the sliding wall 6a of the latch bar 6. In this case, the storage battery assembly 2 is attached and detached using the latch bar 6.
This is done by pressing in the direction of arrow a and compressing the spring 7, but the movement of the latch bar 6
While the rotation movement around the rotation center 6c draws an arc shape, the wall 4a of the storage battery case 4 and the wall 6a of the latch bar 6 face each other on a plane, so they come into contact with each other and the latch bar 6 moves. The problem was that the flow was not smooth.

In addition, in order to prevent this drawback, it is necessary to provide a large gap between the wall 6a of the latch bar 6 and the wall 4a of the storage battery case 4, which increases the looseness of the latch bar 6 in the direction of arrow b, causing the storage battery assembly 2 to It has the disadvantage that it easily comes off from the main body 1.

FIG. 5 shows a conventional example in which a latch presser 12 is added in order to eliminate play in the latch bar 6 in the direction of arrow b in FIG. However, it has been difficult to provide an inexpensive storage battery assembly to users.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a latch bar holding structure for a storage battery assembly that is inexpensive and simple in structure.

The feature of the present invention is that the movement of the latch bar 6 is a rotational movement centered on the rotation center 6c, drawing an arc shape, and the shape of the wall 6a of the latch bar 6 and the wall 4a of the storage battery case 4 has been devised. That's what I did.

According to the present invention, the storage battery assembly 2 can be attached to the main body 1 without the need for parts held by the latch bar 6, so that the user can securely hold the storage battery assembly 2 on the main body 1 with an inexpensive storage battery assembly. Can provide solidity.

An embodiment of the present invention will be described with reference to the drawings.

FIG. 6 shows an embodiment of the latch bar holding structure of the storage battery assembly according to the present invention. In the figure, the wall 6a of the latch bar 6 is formed by a curved surface on a circumference centered on the rotation center 6c of the latch bar 6 according to the present invention. Also, the wall 4 of the storage battery case 4
According to the present invention, a is formed by a curved surface having the same curvature as the wall 6a of the latch bar 6.

In FIG. 6, the main body 1 and the storage battery assembly 2 are composed of a rib 1a provided on the main body 1 and a latch bar 6.
It is held by a hook portion 6b. The latch bar 6 also has a shaft provided at the rotation center 6c of the latch bar and a groove 5a provided in the storage battery case 5.
It is held by the wall 4a of the storage battery case 4 and the wall 6a of the latch bar 6. In this case, the storage battery assembly 2 is attached and detached by pressing the latch bar 6 in the direction of arrow a and compressing the spring 7. However, according to the present invention, the wall 4 of the storage battery case 4
a and the wall 6a of the latch bar 6 are formed by curved surfaces having the same radius of curvature centered on the rotation center 6c of the latch bar 6, so if a minimum gap is provided between them, they can come into contact with each other. Since the backlash in the direction of arrow b is kept to a minimum, the storage battery assembly 2 does not slip out of the main body 1.

[Brief explanation of the drawing]

Fig. 1 is an explanatory side view showing an example of a battery tool employing the cassette method, Fig. 2 is a partially vertical side view showing the connection between the main body and the storage battery assembly, Figs. 3 and 4 , FIG. 5 is a longitudinal sectional side view showing the attachment part of the conventional storage battery assembly and main body, and FIG. 6 is a longitudinal sectional side view showing the attachment part of the main body of the storage battery assembly according to the present invention. In the figure, 1 is the main body, 2 is the storage battery assembly,
3 is a storage battery, 4 and 5 are storage battery cases, 6 is a latch bar, 5a is a groove portion, 6b is a hook portion, and 6c is a latch rotation center.

Claims (1)

[Scope of utility model registration request] It has a storage battery that supplies electrical energy to the main body, a storage battery case that stores the storage battery, and a latch bar that is provided with a hook portion that latches to the main body within the storage battery case, and when the latch bar rotates, the main body and In the battery device that is attached to and detached from the storage battery case, both walls of the sliding wall of the latch bar and the protrusion window wall of the storage battery case are formed with a radius of curvature that is concentric with the center of rotation of the latch bar. , a latch bar holding structure for a storage battery assembly, characterized in that the two are configured to be slidable while maintaining a small interval between them.