JP2004174670A - Electric tool - Google Patents

Abstract

The present invention provides an electric screwdriver having a housing having a high finger slip prevention effect, improving the operability of a motor forward / reverse rotation lever, and hardly damaging a mating building material, and conspicuous even in a dark place.
A second layer of resin is provided on an upper surface of a battery receiving portion in a lateral direction of a handle. Further, the first resin layer 21 is exposed around the through-hole entrance 23 of the forward / reverse rotation lever 22, and the second layer of resin 20 is applied around the first resin layer 21. In addition, the resin 20 of the second layer is disposed on the projecting screw bosses 25 of all four screws of the housing 2. Further, a pearl powder or a metal powder that reflects light is included in the second resin layer 20 as a component.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric screwdriver formed of a two-layer housing.
[0002]
[Prior art]
As shown in FIG. 3, the resin 20 of the second layer is softer than the resin 21 of the first layer (the hatched portion of the lattice), and is therefore provided on the handle portion 10 for the purpose of preventing the fingers from grasping the handle portion 10 from slipping. .
Further, as shown in FIG. 3 and FIG. 4A, the resin 20 of the second layer is soft and has a good feel to the fingers, so it is necessary to dispose it around the through hole entrance 23 of the forward / reverse lever 22. The resin 20 of the second layer was provided up to the inside 24 of the through hole.
As shown in FIG. 3, the second layer of resin 20 is disposed on the upper two screw bosses 25 protruding from the housing 2 for protecting the mating building material.
[0003]
[Problems to be solved by the invention]
The electric screwdriver shown in FIG. 3 had an insufficient finger slip prevention effect.
Further, in the electric screwdriver shown in FIGS. 3 and 4 (A), as shown in FIG. 4 (A), burrs 26 of the second layer of resin 20 are generated inside the through hole 24 on the mold structure, and the forward / reverse lever is rotated. There is a problem that a problem occurs in sliding in the axial direction of No. 22.
In addition, the electric screwdriver shown in FIG. 3 has a problem that the lower two screw bosses 25 protruding from the housing 2 may damage the other building material.
Further, in a construction site where wiring work has not been completed in many cases, there is a problem that it is difficult to find an electric screwdriver at the time of withdrawal at sunset.
An object of the present invention is to solve the above problems, to provide an electric screwdriver that has a sufficient effect of preventing slippage of fingers, improves the operability of a forward / reverse rotation lever, is hard to damage a partner building material, and is conspicuous even in a dark place. That is.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 integrally includes a main body portion that houses a motor that is a driving source, a handle portion, and a battery receiving portion that is detachable with a battery below the handle portion. An electric screwdriver having a housing, and a second-layer resin softer than the first-layer resin, which is injection-molded and heat-welded to the first-layer resin injection-molded housing. The second layer of resin is disposed on the upper surface of the battery receiving portion in the lateral direction of the handle.
According to a second aspect of the present invention, there is provided a housing integrally provided with a main body and a handle for accommodating a motor serving as a driving source, and wherein the first layer of resin is injection-molded into the housing. In the electric screwdriver having the housing which is injection-molded and heat-welded with a second-layer resin softer than the resin, the first-layer resin is formed around the entrance of the through hole of the forward / reverse rotation lever for controlling the rotation direction of the motor. , And the second layer of resin is applied to the periphery thereof.
The invention according to claim 3 has a housing which is joined to a hammer case with four screws, has a body body portion and a handle portion which integrally house a motor, and is formed by injection-molding a first layer of resin. In the electric screwdriver having the housing in which a second layer resin softer than the first layer resin is injection-molded and heat-welded to the housing, the projecting screw bosses in all of the four screws may be provided with the second layer resin. Characterized by applying the above resin.
According to a fourth aspect of the present invention, there is provided a housing having an integrated body body for accommodating a motor serving as a driving source, and a handle, and wherein the first layer of resin is injection-molded into the housing. An electric screwdriver having the housing which is formed by injection-molding and heat-welding a second layer resin softer than the second resin, wherein a pearl powder or a metal powder which reflects light to the second layer resin is contained as a component. It is assumed that.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the hook of the present invention will be described with reference to the drawings.
[0006]
FIG. 2 is an overall explanatory view of an impact driver to which the hook mounting structure of the present invention is applied. The electric screwdriver 1 is rotated by a motor 5 arranged coaxially with an anvil 4 in a housing 2 and a hammer case 3. The rotation of the anvil 4 is reduced by the planetary gear 6 and the hammer 8 connected to the planetary gear 6 via the spindle 7 to rotate and hit the housing 2a and the housing 2b. A body portion 9 and a handle 10 extending below the body portion 9 are formed, a wind window 11 is provided at the rear of the body portion 9, a switch 12 is provided in an upper half portion of the handle portion 10, and a battery receiver is provided in a lower half portion. The part 13 and a part of the battery 14 are respectively provided.
FIG. 1 is an explanatory perspective view of the electric screwdriver 1 formed in two layers on the housing 2. As shown in FIG. 1, after the first resin 21 is injection-molded, the second resin is softer than the first resin. Although the housing 2 is formed by injection-molding and heat-welding a 20 {lattice hatched portion}, a second layer of resin 20 is also applied to the upper surface of the battery receiving portion 13 in the left-right direction of the handle 10 in addition to the handle 10. By arranging, more effective prevention of finger slippage can be realized.
Further, as shown in FIGS. 1 and 4 (B), a configuration in which the first resin 21 is exposed around the through-hole entrance 23 of the forward / reverse rotation lever 22 and a second layer of resin 20 is further applied around the first resin 21. By doing so, the burrs 26 are not formed inside the through holes 24, and the sliding of the forward / reverse rotation lever 22 becomes smooth.
Next, as shown in the right side views of FIGS. 1 and 2, by applying the soft second-layer resin 20 to the projecting screw bosses 25 in all four screws of the housing 2, the mating building material 17 is hardly damaged.
In addition, since the first resin 21 is glass fiber in view of strength and thus cannot be formed due to poor color development, the second resin 20 having a higher transmittance because it does not require strength is irradiated with light. By mixing reflective pearl powder or metal, it can provide an electric driver in silver or gold that reflects the light when illuminated by a flashlight etc. easy.
Finally, the configuration of the two-layer molding described above is not limited to the illustrated electric screwdriver, but is widely applicable to electric tools such as circular saws, screwdrivers, driver drills, and the like.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an electric screwdriver provided with an embodiment of the present invention.
FIG. 2 is an overall front view and a right side view showing the electric screwdriver provided with one embodiment of the present invention.
FIG. 3 is a perspective view showing a conventional electric screwdriver.
FIG. 4A is a cross-sectional view of a conventional electric screwdriver, corresponding to the line AA in FIG. 2; (B) is a sectional view corresponding to the line AA of FIG. 2, showing the electric screwdriver provided with one embodiment of the present invention.
[Explanation of symbols]
2 is a housing, 10 is a handle, 13 is a battery receiving portion, 20 is a second layer of resin, 21 is a first layer of resin, 22 is a forward / reverse rotation lever, 23 is a through hole entrance, and 25 is a projection screw boss.

Claims (4)

A main body body for housing a motor as a driving source, a handle, and a housing integrally provided with a battery detachable battery receiving portion below the handle, and wherein the first layer of resin is injection-molded. In an electric screwdriver having a housing formed by injection-molding and heat-welding a second-layer resin softer than the first-layer resin to the housing, the second-layer resin is provided on the upper surface of the battery receiving portion in the lateral direction of the handle. An electric screwdriver characterized by being arranged. A housing integrally including a main body and a handle for accommodating a motor as a drive source, and a second layer softer than the first resin in the housing formed by injection molding of the first resin. In an electric screwdriver having the housing which is formed by injection molding and heat welding a resin, the first layer of resin is exposed around a through hole entrance of a forward / reverse rotation lever for controlling a rotation direction of the motor, and further around the periphery thereof. An electric screwdriver characterized by a second layer of resin. A housing which is joined to the hammer case with four screws, and which integrally includes a main body and a handle for accommodating the motor, and wherein the first-layer resin is injection-molded to the first-layer resin; In the electric screwdriver having the housing which is formed by injection-molding and heat-welding a softer second-layer resin, the second-layer resin is applied to projecting screw bosses in the housings of all the four screws. Electric screwdriver. A second layer, which is a softer layer than the first-layer resin, is provided in the housing, which has a housing integrally provided with a main body and a handle portion for accommodating a motor as a driving source, and the first-layer resin is injection-molded; An electric screwdriver having the housing which is formed by injection-molding the resin and heat-sealing the resin, wherein a pearl powder or a metal powder which reflects light to the second-layer resin is contained as a component.

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