JP4000998B2 - Portable tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bit mounting structure for a portable tool .
[0002]
[Prior art]
It is necessary to replace the bit because the tip of the above bit is easily damaged by screw tightening, but it is cumbersome to replace it with a bit that is placed on the ground during work at a high place on a stepladder or scaffolding. It is desirable that the replacement bit can be stored in the portable tool body because it is highly likely that the bit is lost due to a screw or the like.
[0003]
In view of this, the device disclosed in Patent Document 1 includes a means for suppressing the rocking of the bit shaft in the circumferential direction and the radial direction, and a stopper that engages with the neck portion recessed in the bit, so There is an example of a bit mounting structure of an electric tool having means for elastically locking axial swing. In addition, Patent Document 1 has a configuration in which a bit mounting portion is provided on a hook piece in order to increase space efficiency.
[Patent Document 1]
JP 2002-254358 A
[0004]
[Problems to be solved by the invention]
The bit mounting structure of Patent Document 1 is good when the double-ended bit 27 having two necks 28 shown in FIG. 3 is mounted, but when the single-ended bit 17 having only one neck 20 is mounted. The orientation is limited to one orientation. Further, a bit can be inserted into the bit storage portion from one direction, but a bit cannot be inserted from the opposite direction. Furthermore, for workers who do not need a hook, the bit storage portion provided in the hook is an obstacle, and there is a problem that the size of the electric power tool body is increased and the operability is lowered.
[0005]
An object of the present invention is to solve the above-mentioned problems, and to provide a compact and easy-to-operate electric tool that can easily and safely mount various types of bits.
[0006]
[Means for Solving the Problems]
[0007]
The invention according to claim 1 is a portable tool comprising a motor, a housing assembly that accommodates the motor, and a bit accommodating portion that accommodates the bit. The bit accommodating portion is inserted into the bit accommodating portion. A through hole formed in the housing assembly, a flat plate portion formed on the inner surface of the through hole so as to be elastically deformable, and a stopper portion protruding inward from the flat plate portion to the inner surface of the through hole. , characterized by having a.
[0008]
The invention described in claim 2 is characterized in that the rotating shaft of the motor and the bit accommodated in the bit accommodating portion are substantially perpendicular .
[0009]
According to a third aspect of the present invention, the housing has two housings divided by a dividing surface substantially parallel to the rotation axis of the motor, and each of the two housings has the through hole, the flat plate portion, and the stopper. The through hole is substantially perpendicular to the dividing surface of the housing .
[0010]
The invention according to claim 4 is characterized in that notches are provided at both ends of the bit storage portion and the end portions of the bit protrude from the bit storage portion .
[0011]
According to a fifth aspect of the present invention, the housing part includes a body part, a handle part extending from the body part, and a battery receiving part provided on the side opposite to the body part of the handle part. A bit storage portion is provided.
[0012]
FIG. 2 is an overall explanatory view of an impact driver to which the bit mounting structure of the present invention is applied . Impact driver 1 includes a housing Kumitai 2 and the hammer case 3, a motor 5, the planetary gear unit 6 to be rotated by a motor 5, a hammer 8 are connected by interposing the spindle 7 to the planetary gear unit 6, the hammer 8 has an anvil 4 struck by rotation . The housing assembly 2 is formed by screwing a housing 2a and a housing 2b . The housing assembly 2 is formed with a body portion 9 and a handle 10 extending below the body portion 9, a wind window 11 behind the body portion 9, a switch 12 within the upper half of the handle 10, and a lower portion In the half part, a battery receiving part 13 and a part of the battery 14 are respectively arranged . Since the impact driver 1 does not have a gap in the inside as described above, the bit receiving portion 15 and the screw 16 are provided at the corner portion of the battery receiving portion 13 and the handle 10 which have no problem in operability even if protruding .
[0013]
FIG. 1 is a partial explanatory view of an impact driver 1 including a bit storage unit 15 . As shown in FIG. 1, the screw 16 is adjacent to the outside of the bit storage portion 15 (the lower left side of the bit storage portion 15 in FIG. 1 ) because the total length is shorter than the total length of the single-headed bit 17 . As a result, the width 18 can be reduced and the battery receiver 13 becomes compact. A bit storage unit 15 is embedded in the battery receiving unit 13, and the one-headed bit 17 is stored substantially completely in the bit storage unit 15. Reference numeral 19 denotes a through-hole through which the one-head bit 17 can be fitted and penetrates the housings 2a and 2b in a direction perpendicular to the motor 5 axis . If the strength of the housings 2a and 2b is sufficient, a configuration in which a part of the through hole 19 is cut off may be used. Incidentally, when the motor 5 parallel to the axis providing the through hole 19, so completely embedded the full length of the receiving removable battery large battery unit 13 unless single-headed bit 17 Kunar, has such a configuration.
[0014]
20 is a neck portion recessed in the single-headed bit 17, 21 is a stopper protruding from an elastic flat plate 22 and capable of elastically locking the neck portion 20, and 23 is a notch in which both side walls of the bit storage portion 15 are cut out. , 24 is the head of the single-ended bit 17, and 25 is the rear part of the single-ended bit 17.
[0015]
As shown in FIG. 3 (a cross-sectional view corresponding to the line AA in FIG. 2), when the single-headed bit 17 is mounted, since a plurality of stoppers 21 are provided, either the head 24 or the rear part 25 of the single-headed bit 17 is used. if brought into sliding press but the single-headed bit 17 axially single-headed bit 17 end with a finger, with fitted into the through hole 19, the stopper 21 locks the elastic engagement to the neck 20 of the single-headed bit 17, is single-headed bit 17 It is assembled to the bit storage unit 15.
[0016]
The single- ended bit 17 is held in the fitted state in the through hole 19, and the single-ended bit 17 is prevented from swinging in the circumferential direction and the radial direction of the single-ended bit 17. In addition, since the stopper 21 is elastically locked to the neck portion 20 to prevent the single bit 17 from swinging in the axial direction, the stability is also improved.
[0017]
Further, the single-headed bit 17 is substantially embedded in the battery receiving portion 13, and as shown in FIG. 4, there is no risk that the single-headed bit 17 hits the little finger 26 grasping the handle 10 and damages the little finger 26. Is excellent.
[0018]
Next, as shown in FIG. 3, when pulling out the single-ended bit 17, if a finger is inserted from one of the cutouts 23 of the bit storage portion 15 and the end of the single-ended bit 17 is slid in the bit axis direction, the stopper since 21 or flat plate 22 is locked by being pressed flat 22 Gawan song and the stopper 21 is released by the single-headed bit 17, Ru can be projected single-headed bit 17 end from the bit receiving portion 15 laterally. If the end is pinched with fingers, the single-ended bit 17 is pulled out from the bit storage portion 15.
[0019]
The through hole 19 is capable of insertion and removal of the single-headed bit 17 in the direction of easy detachable suit operator dominant arm for extending through the battery receiving portion 13.
[0020]
Also , the double-ended bit 27 can be mounted by disposing the plurality of stoppers 21 at positions corresponding to the width of the neck portion 28 of the double-ended bit 27. In this way, by providing the through hole-shaped bit accommodating portion into which the bit is substantially fitted, the bit can be attached and detached from two directions, and the operability is good.
[0021]
Furthermore, the stopper that elastically locks to the neck of the bit prevents the shaft from swinging and can be easily attached and detached, and by providing a plurality of stoppers, it can be installed from either the head or the rear of the single-headed bit that has only one neck. It can be inserted and can provide easy operability.
[0022]
In addition, in the electric tool that is integrally provided with a battery receiving part that can be attached to and detached from the battery at the lower part of the handle, it becomes a compact electric tool by having a bit storage part in a direction perpendicular to the motor pivot at the corner of the handle and the battery receiving part. In addition, by adopting a configuration in which the bit is substantially embedded in the battery receiving portion and can be accommodated, there is no risk that the bit hits the little finger that grasps the handle and damages the little finger, which is excellent in safety.
[0023]
Finally, over the structure of the bit detachable described, the use of the locking means of integrally molded resin which not applied troublesome assembling cost, not limited to the illustrated impact driver, a circular saw that uses bit, screw It can be widely applied to portable tools such as screwdrivers, screwdriver drills, and pneumatic tool drivers driven by compressed air.
[Brief description of the drawings]
FIG. 1 is an enlarged exploded perspective view of a main part showing a cordless impact driver including an embodiment of a bit mounting portion of the present invention.
FIGS. 2A and 2B are an overall front view and a right side view showing a cordless impact driver including an embodiment of the bit mounting portion of the present invention. FIGS.
FIG. 3 is a cross-sectional view corresponding to FIG. 2A-A and a double-ended bit showing a cordless impact driver including an embodiment of the bit mounting portion of the present invention.
FIG. 4 is an enlarged perspective view of a main part showing a grasping state of a cordless impact driver including an embodiment of the bit mounting portion of the present invention.
[Explanation of symbols]
Reference numerals 2a and 2b denote housings, 5 denotes a motor, 10 denotes a handle, 13 denotes a battery receiving portion, 15 denotes a bit storage portion, 16 denotes a screw, 17 denotes a single-headed bit, 19 denotes a through hole , 21 denotes a stopper, and 22 denotes a flat plate.

Claims (5)

A motor,
A housing assembly for housing the motor;
A bit storage section for storing bits;
In portable tools with
The bit storage portion includes a through hole formed in the housing assembly so that the bit is inserted, a flat plate portion formed on the inner surface of the through hole so as to be elastically deformable, and the flat hole from the flat plate portion. A portable tool comprising: a stopper portion protruding inward from the inner surface . 2. The portable tool according to claim 1 , wherein the rotating shaft of the motor and the bit accommodated in the bit accommodating portion are substantially perpendicular . The housing has two housings divided by a dividing surface substantially parallel to the rotation axis of the motor, and each of the two housings is provided with the through hole, the flat plate portion, and the stopper portion, and the through hole The portable tool according to claim 1 , wherein is substantially perpendicular to a dividing surface of the housing . The portable tool according to any one of claims 1 to 3, wherein notches are provided at both ends of the bit storage portion, and the end portions of the bit protrude from the bit storage portion . The housing portion includes a body portion, a handle portion extending from the body portion, and a battery receiving portion provided on the opposite body portion of the handle portion, and the bit receiving portion is provided in the battery receiving portion. The portable tool according to any one of claims 1 to 4, characterized in that:

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