JPH04217474A - Motor hand tool - Google Patents

Abstract

PURPOSE: To suit a grip size to the hand size of a user by installing one or more detachable grip-enlarging member on the grip region of a handgrip. CONSTITUTION: Many grip-enlarging members 5 having different grip sizes are prepared, so that a grip part 4 may suit the size of a larger hand. The enlarging member 5 has an approximately U-shaped cross section, and when it is not mounted on a handgrip 1, the distance between its legs 6, 7 becomes shorter than the thickness B of the handgrip 1. The enlarging member 5 is made of an elastic plastic material and firmly fitted by a snap around the grip part 4.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to electric hand tools, and particularly, but not exclusively, to electric hand tools such as battery operated hand tools and certain "cordless machines." The electric hand tool according to the invention has a handgrip, and the handgrip is configured to be adjustable in grip size.

0002

BACKGROUND OF THE INVENTION Electric hand tools are commercially available in many different forms. These hand tools are usually
Hand grips are manufactured and sold with fixed grip dimensions. This is also the case with battery-powered hand tools such as drills, screwdrivers, and the like. In the case of this type of battery-powered hand tool, there is a problem with the battery pack housed in the tool. This battery pack is relatively heavy and relatively large. The dimensions and mounting position of the battery pack will be one of the following: This means either housing the main part of the battery pack inside the handgrip, resulting in the size of the handgrip case being too large to fit in an average-sized hand, or housing a small portion of the battery pack inside the handgrip. The main part of the tool can be stored inside the tool, with most of it "hanging" below the handle, increasing the overall dimensions of the tool while allowing the size of the handgrip to be selected.

0003

[Problem to be Solved by the Invention] Thus, if most of the battery pack is accommodated in the handgrip, the dimensions of the handgrip become too large, and the size of the handgrip becomes too large for the average hand and all hands smaller than this handgrip. I can't fit it in. This is a major disadvantage from an ergonomic point of view. This is particularly problematic when used by carpenters, electricians, auto mechanics, etc., who use this tool as a daily manufacturing tool. Perhaps for this reason, many cordless machine manufacturers choose to house only a small portion of the battery pack in the handgrip, with the remaining portion "hanging" below the handgrip. This allows the dimensions of the handgrip to be selected based on an average sized hand. As a result, handgrips are always manufactured with one grip dimension, one that fits an average-sized hand.
and sold. This creates problems for workers and users who have hands that are smaller or larger than what would be considered "average sized" hands.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and to increase the variety of grip sizes for electric hand tools, particularly battery-powered hand tools.

[0005]

SUMMARY OF THE INVENTION To achieve the above objects, the present invention provides at least one grip enlarger that is removably attached to the grip portion of a handgrip.

That is, the grip enlarging member can be attached to the hand grip of the tool and can be removed as necessary. The size and/or thickness of the grip enlarger can be varied to suit a particular user demographic.

[0007] According to a preferred embodiment of the present invention, an enlarging member is attached to a portion of the handgrip that rests against the palm of the user's hand. However, it is also conceivable to arrange the enlarging member at a portion of the handgrip that the user's fingers touch. In this case, the grip enlarging member has a shape corresponding to the position of the finger.

[0008]

[Operation] When using an electric hand tool having a hand grip configured to attach a grip enlargement member adapted to the user, the grip surface that comes into contact with the user's hand is basically adapted to fit each user. Become something. This is of great advantage to professional workers who routinely use hand tools of this type in their profession.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of an electric hand tool according to the present invention will be described with reference to the accompanying drawings.

The electric drill machine shown in FIGS. 1 to 3 has the following features:
It is composed of a hand grip 1, a motor storage case 2, and an electric switch 3 attached to the upper end of the hand grip 1.

A grip portion 4 formed at the center of the hand grip 1 is a portion that is normally gripped by an operator or user when using this tool. According to the invention, this grip part 4 is configured to suit the size of the hands of the person who is likely to have the smallest hands of the user group in question. In order to adapt the grip part 4 to larger hand sizes, a number of grip enlargers 5 are provided (only one shown), each having a different grip size.

[0012] As shown in FIG.
When not attached to the hand grip 1, the distance D between the legs 6, 7 of this member is equal to the thickness B of the hand grip 1 to which this enlarged member 5 is attached. become smaller. The enlarged member 5 is made of a resilient plastic material and when it is attached to the handgrip 1 the legs 6, 7 are firmly "snap fit" around the grip part 4 of the handgrip 1.

The inner surface 8 (FIG. 1) of the enlarged member 5 is configured to fit snugly against the grip portion 4 of the handgrip 1 when the member is installed. The outer surface 9 of the expansion member 5 may be smooth, as shown, or shaped to fit the palm of the user's hand.

Up to this point, the grip enlarger 5
Although embodiments of the invention have been described with reference to the accompanying drawings, several variations can be envisaged without departing from the inventive concept. As already mentioned above, the grip enlarger can be considered to fill the space where the user's fingers rest. Furthermore, it is also possible to consider a grip enlarger that surrounds the entire circumference of the grip part 4. The grip enlarger 5 is precisely attached to the grip part 4 by a resilient snap action, but can of course also be secured by separate fasteners such as screws or other means.

[0015] The grip enlarger according to the invention is primarily for electric hand tools, in particular for battery-powered tools. However, it will be apparent to those skilled in the art that similar grip extensions can be used for similar tools, whether hand-powered, pneumatic, hydraulic, or other powered tools. Therefore, the present invention:
The invention is not limited to electric hand tools, but can also be applied to other types of hand tools.

[0016]

As described above, according to the present invention, the grip portion of a hand tool can be easily changed depending on the size of the hand of the user of the tool.

[Brief explanation of the drawing]

1 is a perspective view of an electric hand tool in the form of a drill according to the invention, together with a grip enlargement attached to one side of the hand tool; FIG.

FIG. 2 is a side view showing the hand tool of FIG. 1 with a grip enlarging member attached thereto.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

[Explanation of symbols]

1 Hand grip 4 Grip part 5 Grip expansion member 6 Legs 7 Legs

Claims (4)

[Claims] 1. An electric hand tool, such as a battery-powered hand tool, comprising a hand grip (1), wherein the grip part (4) of the hand grip (1) has at least one grip enlargement member (5). ), the grip enlargement member (5) is configured to be adapted to the size of the hand of the tool user, the grip enlargement member (5) being removably attached to the handgrip and brought into close contact with the grip part, and in the attachment position; An electric hand tool characterized by being configured to have a shape that follows the shape of an actual hand. 2. The electric hand tool according to claim 1, wherein the grip enlarging member (5) is formed to be mounted on a portion of the hand grip (1) that the user's palm touches. . 3. The grip enlarger (5) has a U-shaped cross section, and the two legs (6, 7) of the enlarger have an elastic force when the enlarger is mounted. 3. An electric hand tool according to claim 2, characterized in that it is configured to be gripped around the hand grip (1) in a closed position. 4. Electric hand tool according to claim 1, characterized in that the grip enlarger (5) is made of a resilient plastics material.