JP2562219Y2 - Battery pack holding structure for power tools - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a power tool including a battery pack.

[0002]

2. Description of the Related Art Conventionally, in a battery-powered power tool, a battery is a pack-type storage battery, and continuous operation time can be extended by replacing the battery pack. In such a power tool, for a relatively heavy work tool, the battery pack is also heavier and heavier. Therefore, a structure in which the power tool is not built in the power tool body but is mounted on the outer surface of the power tool body is used. General. In this type, a metal support is protruded from the power tool main body, and a lower end of the support supports a base end of a turning plate that receives the bottom surface of the battery pack, and a lower end of the turning plate. A connection hole is formed at the free end, and the connection hole of the rotating plate is forcibly fitted into a projection provided on the power tool main body, thereby holding the battery pack, and releasing the holding of the battery pack. In such a case, the free end of the rotating plate is directly raised with a finger to release the connection with the projection, thereby attaching and detaching the battery pack.

[0003]

A battery pack with a large voltage output for powering up the power tool is required. In this case, the number of batteries increases and the weight of the battery pack increases. Becomes larger, and the coupling force between the rotating plate and the projection of the power tool main body is required more than ever. However, the conventional release of the connection between the rotation plate and the projection is difficult because the free end of the rotation plate needs to be caused by a finger, and thus the release of the rotation plate is difficult. I can't get too much power. For this reason, it was not possible to sufficiently cope with the increase in the weight of the battery pack, and it was not possible to increase the power of the power tool. In addition, since it is not easy to release the rotating plate, it is not possible to release the rotating plate with one hand while holding the power tool with one hand. This led to a reduction in work efficiency.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make it possible to apply a relatively small force to the rotating plate even when the coupling force of the rotating plate is increased. It is an object of the present invention to provide a battery pack holding structure of a power tool which can be released and can be easily released with one hand while holding the power tool with one hand.

[0005]

According to a first aspect of the present invention, there is provided a power tool main body, wherein a battery pack storage section for storing a battery pack is formed in the power tool main body. A column 9 that contacts the side surface of the battery pack 7 extends from one side of the battery pack 7, and a lower end 9 d of the column 9 supports a base end 10 a of a rotating plate 10 that contacts the bottom surface 7 d of the battery pack 7. The free end 10b of the rotating plate 10 is
The hook portion 20 provided on the side
The free end portion 10b of the rotating plate 10 is
Can be disengaged from the hook portion 20 and at least one of the upper surface near the center of the rotating plate 10 and the lower surface 7d near the center of the battery pack 7 has the bottom surface 7d of the battery pack 7 or the rotating plate. A projection 23 projecting toward the projection 10 is formed.

According to a second aspect of the present invention, the free end portion 10b of the rotary plate 10 is connected to the hook portion 20 of the first aspect.
The tapered surface 30 is formed so as to press the free end 10b of the rotating plate 10 in a direction of separating from the hook portion 20 when the sliding operation is performed so as to separate from the hook portion 20.

[0007]

According to the first aspect of the present invention, the hook portion 20 for locking the free end portion 10b of the rotating plate 10 can be slidably operated. Even if the coupling force between the moving plate 10 and the hook portion 20 of the power tool body 2 is strong, the release operation of the rotating plate 10 requires only a small force, and the free end of the conventional rotating plate is caused by a finger. The release operation is extremely easy compared to In addition, at least one of the upper surface near the center of the rotating plate 10 and the lower surface 7d near the center of the battery pack 7,
d or the projecting portion 23 projecting toward the rotating plate 10 is formed, so that when the hook portion 20 is slid, the free end portion 10b of the rotating plate 10 and the hook portion 20 are connected to each other. The release is performed smoothly by the part 23. Thus, while holding the electric tool with one hand, the hook portion 20 can be slid with one hand to release the rotating plate 10 and take out the battery pack 7.

According to the invention of claim 2, when the free end portion 10b of the rotary plate 10 is slid on the hook portion 20 of claim 1 so as to be detached from the hook portion 20,
Since the tapered surface 30 that presses the free end portion 10b of the rotating plate 10 in the direction to separate from the hook portion 20 is formed, when the hook portion 20 is slid, the tapered surface 30 forcibly releases the force. Thus, the release operation of the rotating plate 10 can be reliably performed with one hand.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In this embodiment, a battery-type charging drill 1 is exemplified as a power tool. As shown in FIGS. 1 and 2, the charging drill 1 includes a drill mounting portion 3 and a front handle 4 at a front portion of a drill body (hereinafter, referred to as “drill body 2”) that is a power tool body 2. A rear handle 5 is provided at a rear portion, and the rear handle 5 is formed in a frame shape having an opening 70 through which a finger can be inserted, and is thin and easy to grip so that the operation switch 6 can be easily operated. ing. A battery pack 7 is provided between the front and rear handles 4 and 5.
Is formed from below, and a means for attaching and detaching the battery pack 7 to and from the battery pack housing 8 includes a column 9 and a rotating plate 10 attached to the battery pack housing 8, And a slidably operated hook portion 20 attached to the rear handle 5 side. Battery pack 7
As shown in FIG. 3, a concave groove 14 and a concave groove 15 having a U-shaped cross section are formed continuously from a front surface 7c to a bottom surface 7d of a main body 7a for accommodating a battery. Is provided with a small protrusion 7b.
A battery contact fitting 13 is provided on the side surface of. Also,
As shown in FIG. 1, the battery pack storage section 8 includes a downwardly opened space portion a and a downwardly opened narrow recess b formed above the space portion a. The battery terminal 12 connected to the drill drive circuit is housed inside the recess b. The battery contact fitting 13 of the battery pack 7 is stored in a state where the battery pack 7 is housed in the battery pack housing 8 from below. Are connected to the battery terminal 12.

A column 9 extends vertically along the front face 7c of the battery pack 7 on the inner wall of the front F of the battery pack storage section 8, and an upper portion 9a of the column 9 fits into the drill body 2 side. The lower portion of the support 9 below the central portion 9b is housed in the concave groove 14 of the battery pack 7, and the lower end 9d of the support 9 is
At the base end 10a. On the surface of the support 9 facing the battery pack 7, a protrusion 16 is formed toward the battery pack 7.
Are protruded, and in the concave groove 14 of the battery pack 7,
A depression 17 is provided at a position corresponding to the projection 16, and the engagement of the projection 16 and the depression 17 can receive a load downward of the battery pack 7. The battery pack 7 can be temporarily fixed inside the battery pack storage section 8. As shown in FIG. 4, the width d of each of the protrusion 16 and the recess 17 is set smaller than the width D of the pin 11 and the concave groove 14 of the support 9, and the battery pack 7 is connected to the support 9. When inserted from below along the pin, there is no possibility that the pin 11 gets caught in the recess 17 and the insertion can be performed smoothly. Also,
The rotating plate 10 pivotally supported by the lower end 9d of the support 9 via the pin 11 receives the bottom surface 7d of the battery pack 7 from below, and is made of, for example, a sheet metal plate. The free end 10b is formed in a substantially triangular frame shape.
A locking hole 18 is formed in the outer edge of the outer ring 0b.

On the other hand, a hook portion 20 which is slidable only in the front and rear directions F and B between the upper and lower walls c and d is provided at the front of the lower end of the rear handle 5.
0 is provided with a locking projection 19 facing the locking hole 18 of the free end 10b of the rotating plate 10, and the locking projection 19 is directed forward F by a spring 22 disposed behind the locking projection 19. It is always spring biased. This hook portion 20
The slide operation unit (see FIG. 2) 21 exposed to the outside is connected to the slide operation unit 21. By sliding the slide operation unit 21 toward the rear B, the locking protrusion 19 of the hook unit 20 is moved by the spring 22. The free end 10 b of the rotating plate 10 can be detached from the hook 20 by being retracted against the force. Here, a protrusion 2 projecting toward the bottom surface 7d of the battery pack 7 is provided on the upper surface near the center of the rotating plate 10.
3 is formed, and when the free end portion 10b of the turning plate 10 is detached from the hook portion 20 by the projection 23 as described later, the turning of the turning plate 10 made of sheet metal is performed more smoothly. Can be done.

Next, the battery pack 7 is inserted into the battery pack storage section 8.
When storing the battery pack in the
b, the battery pack 7 is inserted from below the battery pack storage section 8 so that the recess 9 of the front face 7c of the battery pack 7 is inserted into the support 9 and the lower end 9d of the support 9 and the battery pack 7 are inserted. When the bottom plate 7d is inserted until it coincides with the bottom surface 7d, the rotating plate 10 is rotated around the pin 11 as a fulcrum,
d into the groove 15 so that the rotating plate 10
When the free end portion 10b is pushed into the hook portion 20, the rotating plate 1
The free end portion 10b of the hook portion 20 temporarily retracts the hook portion 20 toward the spring 22 side, and when the locking projection 19 of the hook portion 20 is locked in the locking hole 18 of the free end portion 10b, the hook portion 20 is moved to the free end portion 10b.
6A, the connected state between the free end portion 10b of the rotating plate 10 and the hook portion 20 is maintained as shown in FIG. 6A. The battery pack 7 mounted in the battery pack housing 8 in this manner is connected to the support 9 and the concave groove 14 of the battery pack 7 shown in FIG. The connection supports the load in the left-right direction, the load on the front F is supported by the support 9, the load on the rear B is supported by the front portion of the rear handle 5, and the locking hole 18 of the rotating plate 10 The downward load is supported by the coupling of the hook portion 20 and the locking projection 19, and the battery pack 7 can be stably fixed inside the battery pack storage portion 8.

Also, the battery pack 7 is stored in the battery pack
When the slide operation unit 21 provided at the lower end side of the rear handle 5 is slid backward B with a finger, the locking projection 19 of the hook 20 is disengaged from the locking hole 18 of the rotating plate 10. The rotating plate 10 can be opened with the pin 11 as a fulcrum, as shown by a virtual line in FIG. Therefore,
Even if the coupling force between the rotating plate 10 and the hook portion 20 of the drill body 2 is increased in response to the weight increase of the battery pack 7,
The release operation of the rotating plate 10 requires only a small force, and the free end portion 10b of the conventional rotating plate 10 is caused by a finger.
The release operation becomes extremely easy.

Here, since a projection 23 projecting from the bottom surface 7d of the battery pack 7 is provided at the center of the rotating plate 10, the free end 10b of the rotating plate 10
As shown in FIG. 6 (b), when the rotating plate 10 is detached from the hook portion 20 by the spring force of the rotating plate 10 itself with the projection 23 as a fulcrum, as shown in FIG. 11
, And the connection between the rotating plate 10 and the hook portion 20 is smoothly released by the projection 23 by the spring movement of the rotating plate 10. Therefore, no matter what direction the drill body 2 is tilted, the turning plate 10 is naturally released by the above-mentioned spring motion, and is turned by a hand different from the hand that slides the hook portion 20. There is no need to rotate the plate 10. Therefore,
While holding the charging drill 1 with one hand, the hook portion 20 can be slid with one hand to release the rotating plate 10 and take out the battery pack 7.

As a structure for allowing the turning plate 10 to come off naturally as described above, instead of protruding the protrusion 23 at the center of the turning plate 10, FIGS. As shown in the figure, a protrusion 23 is provided on the bottom surface 7d side of the battery pack 7,
The projecting portion 23 may be used as a fulcrum to give the rotating plate 10 a spring property. As shown in FIGS.
The central portion of the rotating plate 10 may be bent toward the bottom surface 7d of the battery pack 7, and the bent portion 10c may give the rotating plate 10 a spring property. Further, FIGS. 9A and 9B
As shown in FIG.
May be formed integrally with the front part of the hook part 20 at the front part of the hook part 20. In this case, when the hook 20 is slid backward B when the connection of the rotating plate 10 is released, the tapered surface 30 presses the upper surface of the free end portion 10b of the rotating plate 10 downward, whereby the rotation is performed. The release operation of the moving plate 10 can be reliably performed with one hand.

In this embodiment, even if the turning plate 10 naturally comes off the hook portion 20 as described above and the turning plate 10 does not exist below the battery pack 7, the support shown in FIG. Since the downward load of the battery pack 7 is received by the connection between the protrusion 16 provided on the battery 9 and the recess 17 provided in the concave groove 14 of the battery pack 7, the battery pack 7 falls from the battery pack storage portion 8. There is no danger that the hook 20
It is not necessary to receive the battery pack 7 from below with a hand different from the hand that slides the battery pack 7. As a result, while holding the charging drill 1 with one hand, the hook portion 20 can be slid with one hand to easily release the rotating plate 10 and take out the battery pack 7.

As another embodiment of the temporary fixing method of the battery pack 7, as shown in FIG. A protrusion 31 is protruded, and a left and right recess 32 to which the protrusion 31 is connected is recessed in the protrusion 7 b of the battery pack 7, and the protrusion 31 is locked in the recess 32 by mounting the battery pack 7 from below. This locking force may support the downward load of the battery pack 7 so that the battery pack 7 can be temporarily fixed in the battery pack storage section 8 even when the rotating plate 10 comes off.

As still another embodiment of the present invention, FIG.
As shown in the figure, the center of the column 9 supporting the load in the left-right direction and the front F of the battery pack 7 is projected toward the battery pack 7 in the shape of a rectangular tray, and the depression 3 is formed on the outer surface of the column 9.
5 may be formed. In this case, chips generated by drilling of concrete, an iron plate, or the like during use of the drill body 2 are stored in the recess 35, so that the drill body 2
There is an advantage that it is possible to minimize the intrusion of chips into the inside of the drill, thereby eliminating the problem of hindering the operation of the drill body 2 and the like.

[0019]

According to the first aspect of the present invention, the hook portion for locking the free end of the rotating plate can be slid and operated.
Since at least one of the upper surface near the center of the rotating plate or the lower surface near the center of the battery pack is formed with a projection projecting toward the bottom surface of the battery pack or the rotating plate, the rotating plate and Even if the coupling force with the hook of the power tool body is strong, the operation of releasing the rotating plate requires only a small force, and the operation of releasing is extremely easy. Thus, the power of the power tool can be improved. In addition, when the hook portion is slid, the connection between the free end portion of the rotating plate and the hook portion is smoothly released by the projection, so that the power tool can be held with one hand while holding the power tool with one hand. As a result, the rotation plate can be released and the battery pack can be taken out with this hand, so that it is not necessary to replace the battery pack, and the work efficiency can be improved.

According to a second aspect of the present invention, when the hook of the first aspect is slid so that the free end of the rotary plate is detached from the hook, the free end of the rotary plate is moved. Since the taper surface is formed so as to press in the direction of detaching from the hook portion, when the hook portion is slid, the forcible release force by the tapered surface allows the rotating plate to be released with one hand. It can be performed reliably, and replacement of the battery pack is further facilitated.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a power tool used in an embodiment of the present invention.

FIG. 2 is a side view of the electric power tool.

FIG. 3 is a perspective view of the battery pack.

FIG. 4 is a partial front view showing the vicinity of a locking recess of the battery pack according to the first embodiment;

FIG. 5 is a partial cross-sectional view showing a modified example of the battery pack holding structure of the above battery pack.

6A and 6B show an operation state of the rotating plate, in which FIG. 6A is a cross-sectional view showing a closed state of the rotating plate, and FIG. 6B is a cross-sectional view showing an opened state of the rotating plate.

FIGS. 7A and 7B are sectional views showing an operation state of a rotating plate used in another embodiment of the present invention, in which FIG.
Is a cross-sectional view showing an open state.

FIG. 8 is a sectional view showing an operation state of a rotating plate used in still another embodiment of the present invention, wherein FIG.
(B) is sectional drawing which shows an open state.

FIG. 9 is a sectional view showing an operation state of a rotating plate used in still another embodiment of the present invention, wherein FIG.
(B) is sectional drawing which shows an open state.

FIG. 10 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Charging Drill 2 Drill Body 7 Battery Pack 7d Bottom 8 Battery Pack Storage 9 Support 9d Lower End 10 Rotating Plate 10a Base 10b Free End 20 Hook 23 Protrusion 30 Tapered Surface

Claims (2)

(57) [Scope of request for utility model registration] 1. A battery pack accommodating portion for accommodating a battery pack is formed in a main body of an electric tool, and a column abutting on a side surface of the battery pack is extended at one side of the battery pack accommodating portion. The base end of the rotating plate that contacts the bottom surface of the battery pack is pivotally supported, and the free end of the rotating plate is engaged with a hook provided on the power tool body side. The free end of the rotating plate is detachable with respect to the hook portion, and the bottom surface of the battery pack or the rotation of at least one of the top surface near the center of the rotating plate or the bottom surface near the center of the battery pack. A battery pack holding structure for a power tool, wherein a protrusion protruding toward a plate is formed. 2. A battery pack accommodating portion for accommodating a battery pack is formed in the power tool main body, and a column abutting on a side surface of the battery pack extends on one side of the battery pack accommodating portion. The base end of the rotating plate that contacts the bottom surface of the battery pack is pivotally supported, and the free end of the rotating plate is engaged with a hook provided on the power tool body side. The free end of the rotating plate can be disengaged from the hook, and the hook can be slid so that the free end of the rotating plate is separated from the hook.
A battery pack holding structure for a power tool having a tapered surface for pressing a free end of a rotating plate in a direction to separate from a hook.