JP3519479B2 - Portable battery pack - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable battery pack, and more particularly to a backpack-type battery pack used in a portable handheld working machine such as a hedge trimmer and a brush cutter.

[0002]

2. Description of the Related Art A portable hand-held work machine such as a hedge trimmer for mowing usually has a built-in electric motor, and is a working unit composed of a clipper-type cutting blade, a circular saw blade, or a saw chain. A battery is provided as a power source for driving the electric motor with the electric motor. Since the handheld work machine is a work machine that is carried by a worker while carrying the work machine by hand, it is convenient to move the battery together with the worker. For this reason, it has been proposed that an operator can carry the battery on his back or carry it on his shoulder.

[0003]

The backpack-type battery for the hand-held work machine stores the battery in a box-shaped pack or the like, and carries the work while carrying the pack on the back with a belt or the like. Therefore, it is necessary to have a shape that is comfortable to carry on the back, and since the battery pack accommodating the battery has a considerable weight, in order to reduce the feeling of weight for the operator, On the other hand, it is necessary to separately provide a back rest, a shoulder rest, and the like, while it is necessary to dispose a cushion material or the like between the battery and the pack in order to protect the battery built in the battery pack.

Further, when the worker carries out the work while carrying the battery pack on his back, the battery pack is brought into close contact with the back of the worker, and sweat or the like accumulates on the close contact portion to wet the worker's clothes, This caused discomfort to the operator. The present invention has been made in view of such a problem, and an object thereof is, in particular, that the storage of the battery is easy and the protection of the battery is sure,
An object of the present invention is to provide a portable backpack-type battery pack that is easy to assemble, has a small number of parts, and is easy for an operator to carry.

[0005]

In order to achieve the above object, a portable battery pack according to the present invention has an inner container with a battery and a closed lid, and one side surface of the inner container is exposed and surrounded. And an outer cover, wherein the inner container is formed of a cushioning material, the exposed side surface of the inner container is a gently concave curved surface, and the concave curved surface is provided with a plurality of concavo-convex portions, and the outer cover is provided. The shoulder straps are attached to the shoulder straps, and the shoulder straps are attached to band fixing fittings provided on the upper left and right sides and the lower left and right sides of the outer cover body.

[0006]

[Operation] The portable battery pack according to the present invention configured as described above, when the worker carries his or her back on the back during work, the worker is in a state where the exposed side surface of the battery pack is in close contact with the back of the worker. Since it is constructed with a gentle concave curved surface that fits roughly on the back of the operator, and has multiple concavo-convex parts in the vertical direction and is molded with cushioning material, it gently elastically contacts the operator's back. This makes it possible to reduce the feeling of discomfort and weight and to carry it on the back, and since the entire exposed side surface does not come into close contact with the operator's back, even if the operator's back gets wet due to sweat, etc. Don't feel uncomfortable with.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an outline of a state in which an operator carries a portable backpack-type battery pack of this embodiment. The backpack-type battery pack 10 in the illustrated example is carried by a backpack band 31 attached to the upper left and right sides of the rear side of the backpack-type battery pack 10, and the backpack band 31 is configured as two bands. It is laid across the lower left and right lower mounting brackets 33 of the backpack-type battery pack 10 through both shoulders of the worker, and is turned from the left and right sides to the front abdomen of the worker to the end of the backpack band 31. The male and female fittings 34 that are fixed are held on the operator's body.

FIG. 2 is a schematic perspective view of the backpack-type battery pack 10 of the present embodiment, FIG. 3 is a rear view of arrow III in FIG. 2, and FIG. 3 is a left side view of arrow IV in FIG. The backpack type battery pack 10 includes an internal container 11 having an appropriate cushioning property.
And an outer cover body 21 having an appropriate rigidity, the battery B is housed in the inner container 11, and the outer cover body 21 is one side surface of the inner container 11 on the back side of the worker. With the exposed side surface 12 exposed, all the other side surfaces are surrounded and covered.

As shown in FIG. 6 and FIG. 7, the inner container 11 has a hollow portion for accommodating the outer shape of the battery B for accommodating the battery B and elastically accommodating the same. 16 and is integrally formed of foamed resin such as urethane resin. A rear side surface that opposes the exposed side surface 12 is configured as a battery storage lid 13. The battery storage lid 13 has one opening side edge 1 of the inner container 11.
4 is integrally formed in a state of being connected to the inner container 1, and the connecting portion 15 with the opening side edge 14 serves as a hinge.
It is configured so that the opening can be opened and closed by rotating with respect to one main body.

The exposed side surface 12 has a gentle concave curved surface so as to substantially fit the back of an operator who carries the backpack-type battery pack 10, and also has a plurality of recesses 17 formed in the vertical direction. The convex portion 18 is provided. As shown in FIG. 5, the outer cover body 21 that covers the outer periphery of the inner container 11 is composed of two cover bodies, a back side cover body 22 and an anti-back side cover body 23, and an appropriate rigidity such as nylon. Is molded with a synthetic resin having. The back-side cover 22 is configured as four side plates on the left, right, top, and bottom, and has a brim-shaped edge portion 22e on one side of the four side plates. The anti-back side cover body 23 is also configured as a top, bottom, left and right four side plate, and has a cover plate 23e on one side of the four side plate.
As shown in FIG. 8, at the four corners of the anti-back side cover body 23 on the back side cover body 22 side, there are provided ears 24, 24 ... For fixing the both cover bodies 22, 23 to each other. A portion of the back side cover 22 that abuts the ears 24, 24 ... Is provided with indented depressions 25, 25 ..., and the ears 24, 24 ... And the depressions 25, 25 ... Screw holes 24a, 24a ..., 25a, 25a ... Are drilled respectively.

When assembling the inner container 11 into the outer cover 21, the battery storage lid 13 side of the inner container 11 containing the battery B is stored in the anti-back side cover 23 first. After the lid 13 is elastically pushed until it comes into contact with the cover plate 23e of the anti-back side cover 23, the exposed side of the inner container 11 is covered with the back side cover 22, and the back side cover is formed. 22
The brim-shaped edge portion 22e abuts on the exposed side surface 12 of the inner container 11 and elastically presses the cover bodies 22 and 23 until they come into contact with each other. The cover bodies 22 and 23 are in contact with each other, and the inner container 11 is connected to the outer cover body 21.
And the depressions 2 in a state of being covered with
5, 25 ... Screw holes 24a, 24a ..., 25a, 25a
The fixing screws 26, 26 are screwed in to fix both cover bodies 22, 23 of the outer cover body 21 integrally.

The shoulder strap 3 is attached to the outer cover 21.
In order to attach 1, mounting brackets 32 and 33 are provided on the upper left and right sides and the lower left and right sides, respectively. The upper mounting member 32 has a pin shape, and both ends thereof are fixed to the outer cover body 21 by appropriate means. On the other hand, the lower mounting bracket 3
The rear end of the outer cover 3 is rotatably attached to the lower left and right of the outer cover 21 by a fixing screw 35.
At the front end of 3, a long hole 36 through which the shoulder strap 31 is inserted
Has been drilled.

A power terminal 38 is detachably connected to a power terminal on the working machine side via a cabtire cable 37 on one side of the upper portion of the outer cover 21. The cabtire cable 37 is inserted (not shown) through the outer cover 21 and the inner container 11 and is connected to the battery B arranged in the inner container 11 via a fuse F. . One end of the backpack band 31 is fixed by adjustable length fixed bodies 39, 39 by winding one end around upper mounting brackets 32, 32 arranged on the left and right of the upper portion of the outer cover body 21, making a U-turn, and overlapping them. To be done. A portion near one end of the backpack band 31 is sewn in a plow shape, and an extension portion thereof is inserted from the outside into the long hole 36 of the lower mounting bracket 33, 33 located obliquely opposite to the upper mounting bracket 39, 39. After that, it is folded back and extended to the front, and male and female fitting fittings 34, 34 are fixed to the other left and right ends thereof.

Since this embodiment is constructed as described above, in use, after the battery is housed in the internal container 11 and connected to the cabtire cable 37, the internal cover 11 is used to connect the internal battery to the internal casing 11. The container 11 is covered, and the backpack band 31 is attached to the outer cover body 21 to form the backpack-type battery pack 10. An operator carries the battery pack 10 on his / her back and fitting fittings 34, 34 for the backpack band 31. The battery pack 10 from the back to the waist tightly, and the power supply terminal 38 is connected to a power supply terminal of a portable handheld work machine (not shown) such as a hedge trimmer to connect the battery to the handheld work machine. The electric power can be supplied from B, and the work on the handheld work machine is started.

In the above work, the backpack type battery pack 10 is carried on the back of the worker,
The exposed side surface 12 of the backpack-type battery pack 10 comes into close contact with the operator's back as a cushioned backrest, and the exposed side surface 12 is formed into a gentle concave curved surface so as to approximately fit the operator's back. In addition, since it is provided with multiple recesses 17 and protrusions 18 in the vertical direction and is molded of foamed resin, the battery pack 10 can be integrated into the back of the operator gently while ensuring air permeability. Can be carried with you.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment,
Various changes may be made without departing from the spirit of the invention as claimed. For example, although the battery pack is shown as a backpack type, it can be applied to a shoulder type or a handheld type. Further, the exposed side surface of the inner container is configured as a concave-convex curved surface and has a plurality of ridges and valleys, but may have another suitable shape in relation to the contact portion with the operator.

[0017]

As can be understood from the above description, according to the present invention, since the internal container with the closed lid for accommodating the battery is made of the cushioning material, the internal space of the internal container conforms to the shape of the battery. With this structure, the battery can be elastically and firmly held in the battery pack.

Further, since a part of the inner container made of the cushioning material is exposed to the outside as a contact portion with the worker, the battery pack comes into elastic contact with the worker. It is possible to reduce the feeling of discomfort and weight felt by the person. Further, since the exposed side surface is formed as a concave-convex curved surface and has a plurality of ridges and valleys, the battery pack can be carried on the back of the operator with a sense of unity, and can be carried by the operator. Since only the convex portion on the exposed side surface of the battery pack comes into contact with the battery pack, even if the operator's back gets wet with sweat or the like, the work can be performed without feeling awkward. Furthermore, since the battery pack is configured as a combination of the inner container and the outer cover body, the range of selection of materials is widened, the number of parts is reduced, and the assembly is easy.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall outline in which an operator carries a battery pack of an embodiment of the present invention.

FIG. 2 is an enlarged schematic perspective view of the battery pack shown in FIG.

FIG. 3 is an elevation view of the battery pack of FIG. 2 as seen from the direction of arrow III.

FIG. 4 is a side view of the battery pack of FIG. 2 as seen from the direction of arrow IV.

5 is a cross-sectional view of the battery pack of FIG. 2 taken along the line V-V.

FIG. 6 is a schematic perspective view of an inner container.

7 is a sectional view of the inner container of FIG. 6 taken along the line VII-VII.

FIG. 8 is an exploded perspective view showing a fixed portion of the outer cover.

[Explanation of symbols]

10 ... Battery pack 11 ... Inner container 12 ... Exposed side surface (back support surface) 17 ... Recess 18 ... Projection 21 ... External cover 31 ... shoulder strap 32 ... Band fixing bracket 33 ... Band fixing bracket B ... Battery

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Claims (4)

(57) [Claims] 1. A portable battery pack comprising an internal container (11) with a sealed lid and containing a battery (B), and an external cover (21) exposing and surrounding one side surface (12) of the internal container (11). 2. The exposed side surface 12 of the inner container 11 has a gentle concave curved surface, and multiple concave and convex portions 17 and 18 are provided on the concave curved surface, and the back cover band 31 is attached to the outer cover body 21.
The portable battery pack according to claim 1, further comprising: 3. The portable battery pack according to claim 1, wherein the inner container 11 is formed of a cushioning material. 4. The back strap band 31 includes band fixing fittings 3 provided on the upper left and right sides and the lower left and right sides of the outer cover 21.
It is attached to 2, 33.
The portable battery pack described in 3.