JPH0666920U - Jigsaw blade holding structure - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a jig holding structure for a jigsaw, and its object is to improve the operability by enabling the mounting and dismounting of the blade without a jig or tool. A lever 2 having an eccentric cam 2a is provided on a plunger 1, and a blade 5 is held between a holding groove 1a provided at a lower end of the plunger 1 and a head holder 4 pushed by the eccentric cam 2a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig holding structure for a blade.

[0002]

[Prior art]

 Jigsaw is a power tool with a high blade replacement frequency because the blade has a relatively short life and needs to be selected according to the material and thickness to be cut.

Conventionally, jigsaw blades are attached / removed by tightening screws or the like for holding the blades with a jig such as a wrench or a screwdriver.

[0004]

[Problems to be solved by the device]

 The above-mentioned conventional blade holding structure requires jigs such as a spanner and a driver, which is troublesome and troublesome, and these jigs are easily lost.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to allow the jigsaw blades to be attached and detached without a jig.

[0006]

[Means for Solving the Problems]

 The above object can be achieved if the blade can be attached / removed without using a tool such as a spanner or a screwdriver.

Therefore, this is achieved by providing an eccentric cam capable of holding the blade at the end of the plunger.

[0008]

In the blade holding mechanism configured as described above, the protrusion of the blade is inserted into the holding groove at the lower end of the plunger, and the blade head is pressed by the head holder. Since the head holder is engaged with the eccentric cam portion of the lever, the blade can be held between the holding groove and the head holder by moving the lever.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. A lever 2 having an eccentric cam 2a is provided at the lower end of the plunger 1, and a lever 2 having a lever 2 is secured to the right end surface of the lever 2 so that the lever 2 does not fall out of the plunger 1. The pin 3 is provided inside the head holder 4 to prevent the head holder 4 from falling off. A holding groove 1a for holding the protrusion 5a of the blade 5 is provided at the lowermost end of the plunger 1.

When installing the blade 5, the blade 5 is inserted from the lower end of the plunger 1 into the holding groove 1a of the plunger 1 with the lever 2 facing upward as shown in FIG. When the lever 2 is rotated downward as shown in FIG. 2, the eccentric cam 2a of the lever 2 moves the head holder 4 to the blade head side, that is, downward, and fixes the blade 5. On the contrary, to remove the blade 5, the lever 2 may be rotated upward to release the pressing force of the head holder 4, and the blade 5 can be easily removed.

[0011]

[Effect of device]

 According to the present invention, the blade can be attached / removed only by pushing the blade toward the plunger side and turning the lever, which eliminates the need for a jig / tool for attaching / removing the blade. You can

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a state after a blade is attached.

FIG. 3 is a cross-sectional view showing when a blade is attached.

[Explanation of symbols]

1 is a plunger, 2 is a lever, 3 is a pin, 4 is a head holder, and 5 is a blade.

Claims (1)

[Scope of utility model registration request] 1. A jigsaw for converting rotary motion of an electric motor into vertical reciprocating motion and transmitting it to a plunger, and cutting various work materials with a blade attached to a lower end portion of the plunger. A jig holding structure for a jigsaw, characterized in that a lever having an eccentric cam portion is provided, and the blade is held between the eccentric cam and a blade holding groove provided at a lower end of the plunger.