JP2003033901A - Reciprocating saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance usability by making an illuminated place changeable. SOLUTION: A base plate 7, which is fixed to a front end of a housing 2, is fitted turnably with a switching ring 15 in which a light-emitting diode(LED) 20 is mounted in an eccentric position in such a manner as to be pointed forward. Positive and negative electrode plates, in which protrusions 12a and 13a, etc., are protruded intermittently on the loci of movements of lead terminals 21 and 22 of the LED 20 along with turning operations of the switching ring 15, are bonded to an electrode holder 10 on the front of the base plate 7; and the LED 20 is made to emit light in different places by selecting any one of the protrusions 12a and 13a along with the turning operations of the switching ring 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating saw having a motor-driven reciprocating blade at a front end of a housing.

[0002]

2. Description of the Related Art A reciprocating saw has a motion converting mechanism for converting the rotation of the motor into a linear reciprocating motion of a reciprocating member in a housing containing a motor, and a blade is installed at the front end of the reciprocating member projecting forward from the housing. By mounting on the wire, the blade reciprocates by driving the motor, and the cutting operation becomes possible. On the other hand, in such a reciprocating saw, it is known that an illuminating body such as a light emitting diode is provided at the front end of the housing so that the cut portion (black line or the like) can be visually recognized even in a dark place so that the front of the housing can be illuminated. .

[0003]

However, since the illuminating body is fixed to the housing and always illuminates the same place, for example, the reciprocating saw is supported laterally to make a plunge cut (for cutting out a window frame or the like). Depending on the work, the lighting function may not match the lighting function, and the lighting function may not be useful.

Therefore, an object of the present invention is to provide a reciprocating saw which can be properly illuminated regardless of work, and which is excellent in usability.

[0005]

In order to achieve the above object, the present invention according to claim 1 provides a switching member, through which a reciprocating member penetrates, rotatably provided at a front end of a housing to switch an illuminating member. Is provided at an eccentric position, and the illumination position of the illumination body can be changed around the blade by rotating the switching member. According to a second aspect of the present invention, in addition to the object of the first aspect, positive and negative leads of the illumination body are attached to the mounting surface of the switching member in the housing in order to enable the illumination body to be turned off when the illumination is unnecessary. Positive and negative electrode plates with which the terminals can contact each other are intermittently provided on the movement locus of the lead terminal accompanying the rotation operation of the switching member, and the turning-off of the illumination member can be selected by the rotation operation of the switching member. It is a thing.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a front end portion of a reciprocating saw ((A) shows a plane and (B) shows a side surface)
The reciprocating saw 1 is provided with a slide bar 3 as a reciprocating member, which is slidable in the axial direction, at the front end (right side in FIG. 1) of a housing 2 having a motor (not shown) built therein. The slide bar 3 can be reciprocated by a conversion mechanism that is provided in the housing 2 and converts the rotation of the motor into a linear reciprocating motion, and the blade 4 can be mounted on the same straight line at the front end. A guide shoe 5 is mounted on the housing 2 and supported by a connecting bar 6 projecting forward, so that the blade 4 can penetrate in a perpendicular direction.

Further, on the front surface of the housing 2, a base plate 7 is provided in the center of a ring-shaped plate portion 8 in which a tubular portion 9 through which the slide bar 3 penetrates is erected forward.
And an electrode holder 10 that is loosely inserted in the tubular portion 9 of the base plate 7 and comes into contact with the plate portion 8 from the front, are attached by two screws 11 and 11. As shown in FIG. 2, positive and negative electrode plates 12 and 13 formed in a semicircular shape concentric with the tubular portion 9 are provided on the front surface of the electrode holder 10.
The side is outside and the-side is inside, and they are adhered at a predetermined interval, but they are located on an arc having a larger radius than the semicircular portion of the outer electrode plate 12 at both ends and the intermediate position of each semicircular portion. The three projecting portions 12a to 12c and 13a to 13c are similarly provided at predetermined intervals in the radial direction.
In addition, the protruding portions 12 a and 13 a of the electrode plates 12 and 13 penetrate the plate portion 8 of the base plate 7 and the housing 2
Connecting pieces 12d and 13d projecting inward are extended, and lead wires 14 and 14 electrically connected to the power supply circuit in the housing 2 are soldered to the connecting pieces 12d and 13d.

A switching ring 15 as a switching member is mounted on the base plate 7 from the front. The switching ring 15 is provided on the plate portion 8 of the base plate 7.
Is a dish-like body having the same diameter as the through hole 16 in which the cylindrical portion 9 is loosely inserted, and a sleeve 17 having a flange portion 18 having a diameter larger than that of the through hole 16 is loosely inserted into the through hole 16. By being screwed onto the outer periphery of the tubular portion 9, the flange portion 18 is prevented from coming off forward. In this state, the open end of the rear end of the switching ring 15 is fitted to the step portion 19 formed on the outer peripheral edge of the plate portion 8 of the base plate 7, and is rotatable coaxially with the base plate 7.

Reference numeral 20 denotes a light-emitting diode (hereinafter referred to as "LE") mounted forward at an eccentric position of the switching ring 15.
D ”), with the switching ring 15 attached, the + side lead terminal 21 is arranged on the arc formed by the protrusions 12a to 12c of the electrode plate 12 of the electrode holder 10, and the − side lead terminal 22 is formed on the electrode plate. Protrusions 13a to 13c at 13
Are arranged so that they are respectively located on the arcs. Therefore, as shown in FIG. 2A, at the turning position of the switching ring 15 in which the LED 20 is located on any of the three protruding portions 12a, 13a to 12c, 13c, the lead terminals 21, 22 of the LED 20 and the electrode plate 12 are rotated. , 13 maintains the electrical connection between the two, and as shown in FIG.
When 0 is not located on any of the three protrusions 12a, 13a to 12c, 13c, L
The ED 20 is located at a position distant from the semi-circular portions of the electrode plates 12 and 13 in the radial direction, and is connected to the lead terminals 21 and 22 and the electrode plate 1.
The electrical connection with the terminals 2 and 13 is cut off.

In the reciprocating saw 1 configured as described above, when a switch lever (not shown) provided in the housing 2 is turned on, the motor is driven and the blade 4 reciprocates. Here, the protruding portions 12a of the electrode plates 12 and 13,
13a to 12c, 13c and the lead terminal 2 of the LED 20
Depending on the setting of 1 and 22, the electrical connection between them is such that the lead terminal 2 of the LED 20 is accompanied by the turning operation of the switching ring 15.
LED is obtained because it is obtained intermittently on the locus of movement of 1, 22
20 as shown in FIG. 2A, for example, the protrusions 12b and 13b.
, The lead wires 14, 14 and the electrode plate 12,
LED20 which is electrically connected to the power supply circuit via 13 lights up,
The front of the housing 2 can be illuminated. Then, when it is desired to change the illumination location, the switching ring 15 is gripped and rotated by 90 ° to the left or right, and the LED 20 is moved to another protruding portion 12.
a, 13a or 12c, 13c, LE is also connected via the lead wires 14, 14 and the electrode plates 12, 13.
Since the lighting of D20 is maintained, it is possible to illuminate at three places around the blade 4. If no lighting is required, LE
When the switching ring 15 is rotated so that the D20 is located at a position other than the protruding portions 12a, 13a to 12c, 13c, LE
The electrical connection between the lead terminals 21 and 22 of D20 and the electrode plates 12 and 13 is cut off, and the LED 20 can be turned off.

As described above, according to the reciprocating saw 1 of the above-described embodiment, the switching ring 15 through which the slide bar 3 penetrates is rotatably provided at the front end of the housing 2, and the LED 20 is provided at an eccentric position of the switching ring 15 to perform switching. Since the illumination position by the LED 20 can be changed around the blade 4 by rotating the ring 15, proper illumination can be performed in accordance with a work such as plunge cutting, which is excellent in usability. Further, here, the positive and negative electrode plates 12 and 13 which the lead terminals 21 and 22 of the LED 20 can respectively come into contact with the mounting surface of the switching member in the housing 2, and the lead terminals 21 and 22 accompanying the rotating operation of the switching ring 15. Is intermittently provided on the movement locus of the LED, and the LED is turned by rotating the switching ring 15.
Since it is selectable to turn off the LED 20, it is possible to turn off the LED 20 by the switching ring 15 when illumination is not needed, thereby preventing wasteful consumption of power and deterioration of the LED 20.

In the above embodiment, the protrusions of the electrode plates 12 and 13 are formed at three locations to allow the LED 20 to rotate in the range of 180 °. However, the protrusions can be increased or the length in the circumferential direction can be increased. If you do, the range of choice of lighting spots will expand,
More convenient to use. This is the same even when the rotation range of the LED is widened. Moreover, as an illuminator, LE
Not only D, but a miniature bulb, a tube bulb, or the like can also be used.
Furthermore, if it is not necessary to turn off the illumination body, the electrode plate
It is possible to eliminate the protruding portion and provide it over the entire circumference on the movement trajectory of the illumination body, or to directly connect the lead wire to the illumination body such as LED so that there is a margin within the rotation range of the switching ring. It can also be routed.

[0013]

According to the first aspect of the invention, the switching member through which the reciprocating member penetrates is rotatably provided at the front end of the housing, and the illuminating body is provided at the eccentric position of the switching member. Since the illumination position of the illumination body can be changed around the blade by the rotating operation, proper illumination can be performed according to the work such as plunge cutting, which is excellent in usability. According to the invention of claim 2, in addition to the effect of claim 1, it is possible to turn off the illumination body by rotating the switching member, so that the illumination body is turned off when the illumination is not necessary. It is possible to prevent wasteful consumption of electric power and deterioration of the lighting body.

[Brief description of drawings]

FIG. 1A is a plan view of a front end portion of a reciprocating saw. (B) It is a side view of the front end portion of the reciprocating saw.

FIG. 2A is a cross-sectional view taken along the line AA (LED lighting state). (B) It is the sectional view on the AA line of the state which rotated the switching ring from (A) to the light extinction position of LED.

[Explanation of symbols]

1 ... Reciprocating saw, 2 ... Housing, 7 ... Base plate, 8 ... Plate portion, 9 ... Cylindrical portion, 10 ...
Electrode holder, 12, 13 ... Electrode plate, 15 ... Switching ring, 20 ... Light emitting diode

Claims (2)

[Claims] 1. A reciprocating saw having a front end of a housing, a reciprocating member which is reciprocally driven by a motor, and which is capable of mounting a blade, and which projects forward, and an illuminating body capable of illuminating the front of the housing. Then, at the front end of the housing, a switching member through which the reciprocating member penetrates is rotatably provided, the illuminating body is provided at an eccentric position of the switching member, and the illuminating body is operated by the turning operation of the switching member. A reciprocating saw, wherein the illumination position can be changed around the blade. 2. A positive / negative electrode plate capable of contacting the positive / negative lead terminals of the illuminating body with the mounting surface of the switching member in the housing is intermittently connected to the movement locus of the lead terminals accompanying the turning operation of the switching member. 2. The reciprocating saw according to claim 1, wherein the reciprocating saw is selectively provided to turn off the illumination body by rotating the switching member.