JPS58222804A - Electric tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to power tools such as circular saws and planes, and more particularly to techniques for improving usability.

In conventional power tools such as circular saws, as shown in Figure 1, there was a gap (L) between the handle (the direction in which 4γ was pressed and the center of gravity <1), so When performing cutting work, use a power tool (A
)′ had the problem that it did not move straight, but was twisted, resulting in increased forward resistance and poor usability. This is even more noticeable in devices with built-in batteries. In other words, in the case of an AC type, the power can be large, so even if a slight binding occurs, the rotation of the saw blade will not be stopped, and there are few problems in terms of usability, but in the case of a battery type, the saw blade will not stop rotating. If − is made equivalent to AC type,
A large-capacity battery is essential, and for this purpose weight reduction is attempted.By the way, when trying to reduce weight, the electric power that drives Tanabata is also limited, and therefore, as soon as a problem arises, it is possible to reduce weight. The rotation of Tanabata has slowed down, making it impractical. In addition, with the conventional blade, there was a problem that the blade was obstructed by the battery and the blade was not visible, making it even more difficult to use.The present invention was made in view of these problems.
The purpose is to provide a power tool that is convenient to use due to its rational configuration.

That is, the power tool of the present invention is a power tool that includes a built-in blade (2) for rotationally driving a cutter (11) and a battery (3) for supplying power thereto. 3)
, and a handle (4) is formed above the battery (3) and motor (2), approximately on the center of gravity line (0). This made it easier to use.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The prisoner is a power tool, and the housing-like body (5) has a temperature of ℃
- Built-in motor (2), motor shaft 16) and reducer (7)
A circular saw (101 as an example of a cutter (11) is attached to the output shaft (8).The housing-shaped main body (5) As shown in Figure 2, a battery storage chamber (11) is provided to store the rechargeable battery (3) in a removable manner. The front end side part (131) of the main body (5) is rotatably supported on the plate α in a column.The rear end side part of the main body (6) is supported by a bolt (tg+
It is designed so that it can be fixed to the surface plate with the butterfly nut at zero angle.

The temperature controller (2) is disposed on the front side in the operating direction of the power tool (4), and the battery (3) is disposed behind it. In such a case, the center of gravity (G) of the entire body including the heavy objects such as the surface plate θ, motor (2), battery (3), etc. is the same as the center of gravity (G) between the ℃-taper (2) and the storage position. battery(
3). And the main body (5
) is integrally formed with a handle (4), the handle (4) is shaped like a grip in the front and back direction, and the handle (4) is centered at the center of gravity (G
) -: It is arranged on the vertical center of gravity line (O) passing through. In the figure, (17) is a black-marking window and is formed on the surface plate θ.

Therefore, when holding the handle (4), it can be held above the center of gravity (G), and therefore the power tool (A) can be held in a substantially horizontal position, and during cutting work, the power tool (A) can be held in a substantially horizontal position.
When A) is pushed forward along the wood, the handle (4) is on the center of gravity (O), so there is no rotational force applied to the electric tool (circular saw). This allows you to stably follow the ink lines drawn on the wood from the ink window (+7) without causing any strain on the wood, making it easy to cut.

The end of the switch operating part (2), which is important to operate, is provided on the inner surface of the handle (4). Since it is formed on the inner surface of the switch operation part (1), the important operations from 1 to 1 can be performed without tilting the power tool (A), and the operation can be performed easily.

As shown in Figure 2, the battery storage compartment (1) is designed so that the battery (3) can be stored horizontally. By doing so, the position of the handle (4) is shifted to the center of gravity (as shown by the solid line in Fig. 7), compared to when the vertical type is used as shown by the chain line in Fig. 7.
2), it can be pushed near the center of gravity (G), and the vertical rotational moment can be suppressed, making cutting work easier.

The main body (5) is made of synthetic resin and has bolts that are bolted to the main body (5), so the motor (2), battery storage chamber (river and Toride (4
), but as shown in Figure 2, the battery (
When the battery storage chamber (11) is provided so that the battery storage chamber (11) is placed horizontally, the battery storage chamber (11) will protrude from the surface plate θ. A reinforcing rib (2)- is formed to prevent damage.Using the thick reinforcement rib (2), as shown in Figure 6, a fixed safety h Bar 9) to main body (5)
This is the connection part to be connected to the bolt (21).

(2 is a battery fixing plate, and as shown in Fig. 6, a hook part (24
), a locking part (to) is formed at the other end, and an intermediate cord is formed.
It becomes thin in one part, and forms a 17-piece part (material), and the hook of the reinforcement lip (sha) is hooked on the recessed part η, and the latching part is cut (to). The battery (3) inserted into the battery storage chamber (1) is held in place by being locked to the locking receiver (2) on the main body (5) so that it does not come out. (The pole terminal of the battery (3) housed in the battery (3) comes into contact with the contact fitting electrically connected to the battery (2) side,
Power is supplied to the t-tater (2) via a switch (not shown) provided in the middle of the wiring.

In the figure, (31) is a movable cover, which is rotatably pivoted to the cylindrical cover (to) extending from the 4-jar box (c) of the reducer (7), and the operating part ( By holding and rotating the circular saw (10) as shown in Figure 8,
It is designed so that it can cover the lower half of the body.

In summary, the present invention has a handle formed on the upper part of the battery and Tanabata, approximately on the center of gravity line, so that when moving the main body by pushing the handle... This has the advantage that it does not apply rotational tension to the main body, does not cause binding, and is easy to use, and is particularly effective in those with a built-in battery. The battery is placed behind the Tanabata, so when using it as a circular saw, for example, the blade edge can be seen from both the left and right sides, allowing the user to move safely and stably along the cutting line (inking). In addition, since the handle is located approximately on the center of gravity, the entire body can be held approximately horizontally when held, which eliminates unnecessary force on the wrists and reduces fatigue. The switch operating portion can be provided approximately on the center of gravity line where the handle is, and when the switch operating portion is provided approximately on the center of gravity line in this way, the main body will not tilt when turning on and off the switch.
It has the advantage of being easy to operate without putting strain on the wrist.

[Brief explanation of drawings]

FIG. 1 is a plan view of a conventional example, and FIG. 2 is an embodiment of the present invention.
Battery 2 outside l - is perspective 1, degree 9 "same 10 vertical 1,・'
,,. 4 is a partial perspective view of the same as the above, FIG. 5 is a partially omitted side view of the same as the above, FIG. 6(a) is a partially broken plan view of the same as the above, and FIG. 6(b) is the same as the above. Perspective view of the battery, Figure 6 (
C) is a sectional view taken along the line X-X of FIG. 6(a), and FIG.
) is the battery, (4) is the handle, (G) is the center of gravity, (/l is the center of gravity line) 0 Agent Patent Attorney Ishi 1) Long 7 Figure 4 Figure 5

Claims (1)

[Scope of Claims] (1) A power tool that includes a Tanabata that rotates a cutter and a built-in battery that supplies power to the Tanabata, in which the battery is disposed behind the Tanabata, and the battery and the Tanabata are connected to each other. (2) A power tool characterized by having a handle formed on the upper part substantially on the center of gravity. A power tool according to claim 1. (8) A power tool according to claim 1, comprising a motor, a battery, and a handle arranged within the range of the surface plate. (4) A battery storage chamber formed in the main body allows the battery to be placed horizontally, 2. The power tool according to claim 1, wherein a part of the battery storage portion projects laterally outward from the surface plate. (5) Provide a reinforcing rib in the battery storage chamber that protrudes from the surface plate,
A power tool according to claim 4, characterized in that the reinforcing lip is provided with a mounting screw hole.