JPS6154561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electric circular saw, and particularly to an electric circular saw using a battery as a power source.

[Background Art] When operating an electric circular saw using battery power, a large-capacity battery is required, so a lead-acid battery, especially a maintenance-free sealed pack type battery, is usually used. There is. However, in the past, as shown in Figure 1, a sealed pack type storage battery was further housed in a case and a battery package 1 was constructed.
4, and this battery package 14 was housed in a battery storage section 2 provided in the main body housing of the electric circular saw. At this time, since the storage battery is housed in a case, the battery compartment 2 is exposed to the outside, but this also exposes the electrical connections between the battery and the main body, which is not desirable. However, a separate case is required to house the storage battery. Of course, if a battery storage section with a door is formed so that the storage battery is housed within the main body housing, the above-mentioned problems will not occur, but in this case, the following problems occur.

In other words, the position of the battery storage portion in the axial direction of the circular saw blade is restricted from the center of gravity, and the battery storage portion is installed on the outer periphery of the portion of the main housing that surrounds the motor. At this time, if the battery insertion port does not open at the end face of the main housing, but one end of the main housing protrudes beyond the battery insertion port, and the outer wall of the main housing is located on the front side of the battery insertion port, If the door for opening and closing the battery insertion slot is pivoted on the main body housing side from the viewpoint of opening and closing operations, the door may interfere with the outer surface of the main body housing, and there is a possibility that the door cannot be opened sufficiently. Therefore, in order to be able to fully open the battery insertion port, the battery storage section must be provided in a state where it largely protrudes from the main body housing, which imposes restrictions on miniaturization.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to reduce the size of the battery compartment and to make it easy to attach and detach the battery, even though the battery compartment is equipped with a door. We are here to provide you with an electric circular saw that you can get along with ease.

[Disclosure of the Invention] According to the present invention, a battery storage box is integrally attached to the outer surface of a main body housing that includes a circular saw blade and a motor that drives the circular saw blade, and In electric circular saws in which the main body housings are arranged in intersecting directions, the battery storage box provided in the main body housing with the circular saw blade arranged at one end has a part of the outer surface between both ends of the main body housing on one side. The inner wall of the main body housing is provided with a battery insertion port which is on the other end side of the main body housing and opens in a direction along the outer surface, and is located closer to the main body housing than the opening edge of the battery insertion port on the main body housing side. It shall be equipped with a door that is pivotally supported so that the battery insertion port can be opened and closed, and the door is provided with an opening that corresponds to the other end of the main housing that is further away from the circular saw blade than the battery insertion port and allows this to escape. The main feature is that when the door that is pivotally supported on the main body housing side is opened, the portion of the main body housing that would interfere with the door is accommodated in the opening of the door.

The present invention will be described in detail below based on the illustrated embodiment. The electric circular saw includes a substantially cylindrical main body housing 1 that houses a motor, and a safety cover 6 that covers a circular saw blade disposed at one end of the main body housing 1. , and battery storage boxes 2 which are integrally arranged in parallel on the outer peripheral surface of the main body housing 1. This battery storage box 2
The main body housing 1 has an outer surface as one inner wall, and is provided with a battery insertion port 3 that opens along this outer surface and in the opposite direction to the circular saw blade. 4 is installed. One side edge of the door 4 is pivoted so that the battery insertion slot 3 can be opened and closed freely, and the door 4 has a U-shaped front face.
Each tip of the upper and lower horizontal pieces 8, 8 is attached to the main body housing 1.
It is supported by pivot supports 7, 7 provided at the boundary between the battery storage box 2 and the battery storage box 2, and closer to the main body housing 1 than the opening edge of the battery insertion slot 3.

Further, an engaging portion 10 is provided on the vertical piece 9 of the door 4 in a protruding manner. , the door 4 keeps the battery insertion port 3 closed. However, since the door 4 is U-shaped as described above and has the opening 5 between the upper and lower horizontal pieces 8, it does not completely cover the battery insertion slot 3. Although the shape of the opening 5 is rectangular in the illustrated example, the shape is not limited to this.

In this electric circular saw, the storage battery 13, which is a sealed pack type lead-acid battery, is inserted into and removed from the battery storage box 2 through the battery insertion slot 3. The storage battery 13 is connected to the storage battery 13 through the contact terminal provided in the
When the door 4 is opened for attachment/detachment, the battery insertion opening 3 in the main body housing 1 is located further away from the circular saw blade and in front of the battery insertion opening 3. Since the other end 12 located on the side of the door 4 fits into the opening 5 provided in the door 4, the door 4 can fit into the battery insertion slot 3 without being obstructed by the other end 12. 90 for the surface
It can be fully opened to . That is, if the door 4 did not have the opening 5, the battery storage box 2 would have to be formed to protrude greatly from the outer surface of the main body housing 1 in order to avoid interference with the other end 12, resulting in a large overall size. However, since there is no interference between the other end 12 and the door 4, the amount of protrusion of the battery storage box 2 from the main body housing 1 can be reduced.

[Effects of the Invention] As described above, in the present invention, the door that closes the battery insertion port of the battery storage box that stores the storage battery is pivoted on the main body housing side, so the door can be easily opened and closed. Even though the door is pivoted in this way, the amount of protrusion of the battery storage box from the main body housing is determined by the opening provided in the door to prevent interference between the main body housing and the door when the door is opened. Even if the size is small, there is no problem in attaching and detaching the storage battery, and therefore the overall size can be reduced.
Furthermore, the opening provided in the door also contributes to cooling the storage battery.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional example, FIG. 2 is a front view of an embodiment of the present invention, and FIG. 3 is a broken horizontal sectional view of the same.
4a and 4b are perspective views showing the opening and closing states of the same door, in which 1 is the main body housing, 2 is the battery storage box (battery storage section), 3 is the battery insertion slot, 4 is the door, and 5 is the opening. 12 indicates a protrusion.

Claims (1)

[Scope of Claims] 1. A battery storage box is integrally attached to the outer surface of a main body housing that includes a circular saw blade and a motor that drives the circular saw blade, and a battery storage box is attached in a direction intersecting the rotating surface of the circular saw blade. In an electric circular saw in which a main body housing is arranged, a battery storage box provided in the main body housing with a circular saw blade arranged at one end is constructed by using a part of the outer surface between both ends of the main body housing as one inner wall. is provided with a battery insertion port which is on the other end side of the main body housing and opens in a direction along the outer surface, and is pivoted at a position closer to the main body housing than the opening edge of the battery insertion port on the main body housing side. The battery insertion port is provided with a door that can be freely opened and closed, and the door is characterized by having an opening that corresponds to the other end of the main body housing that is further away from the circular saw blade than the battery insertion port and allows the battery insertion port to escape. Electric circular saw. 2. Claims characterized in that the front face of the door is U-shaped, the tips of the upper and lower horizontal pieces are pivoted, and the space between the upper and lower horizontal pieces is an opening. The electric circular saw described in item 1.