JPH0753906Y2 - Start switch for electric stapler - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a start switch for activating an electric stapler by pressing the corners of a material to be bound.

[0002]

2. Description of the Related Art Conventionally, there is known an electric stapler for driving a driver by an electric motor to drive staples supplied from a magazine onto a clincher provided on a binding table and to sew a material to be stapled supplied on the binding table. Has been. A start switch is arranged slightly inside the clincher portion, and when feeding the material to be bound onto the binding table, the end of the material to be bound is pressed against the start switch to turn on the electric motor. By the way, the supply direction of the material to be bound and the direction connecting the clincher portion and the portion contacting the center switch are aligned, and the material to be bound is pressed against the contact portion of the start switch when supplying the material to be bound. At this time, the material to be bound will rotate around this contact portion, so that the actual binding position of the material to be bound matches the target position. 38465
As disclosed in Japanese Utility Model Application Laid-Open No. 2-130778, a start switch was proposed in which a corner release portion for releasing a corner portion of a material to be bound is formed at a contact portion of the material to be bound of a switch lever.

However, according to such a switch mechanism, when the number of the materials to be bound is small, the rigidity of the entire materials to be bound is very small. Therefore, when the start switch is pressed, the corner portion of the materials to be bound is pressed. There was a case where it floated up and bent, and reliable switching was not possible.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide a start switch for an electric stapler in which the material to be bound is not bent even when the corners of the material to be bound are pressed during binding.

[0005]

In order to achieve the above object, the start switch of the electric stapler according to the present invention comprises a base having a clincher portion at the front end, a magazine for ejecting staples toward the clincher portion, and An electric motor for rotationally driving the magazine is provided, and at the rear position of the clincher, an input switch fixed on the base and an input operation of the input switch is brought into contact with a material to be bound supplied at the time of binding. A switch lever is provided, which normally biases the switch lever away from the input switch and projects upward from the clincher portion, and the material to be bound supplied at the time of binding presses the contact portion of the input switch. In the start switch of the electric stapler that is arranged so that Forming a corner relief portion for escaping the corner portion of the material, and supporting the corner relief portion on the lower surface of the corner portion of the material to be bound; and both sides of the corner portion of the material to be bound upright from the support surface. A pressing member that is formed from a pair of diverging standing walls that receive the end faces and that engages with the upper surfaces of both side ends of the corners of the material to be stitched supplied to the inner side surface of the standing walls to prevent its bending. It is characterized by forming a ridge.

[0006]

According to the above-described structure, when the material to be bound is pushed into the predetermined position during binding, the end portion of the material to be bound comes into contact with the contact portion of the start switch and swings it. Input operation of the input switch. As a result, the switch of the electric motor is turned on, the magazine is driven, and the binding operation of the material to be bound is performed.

When binding the corner of the material to be bound, the corner of the material to be bound is inserted into the corner relief portion of the contact portion of the switch lever. The lower surface of the corner portion of the material to be bound inserted in the corner relief portion is supported by the support surface. Both end surfaces of the corner contact the inner surface of the standing wall. Further, the upper surfaces at both ends of the corner portion engage with the pressing ridges on the inner side of the standing wall. Therefore, when the number of materials to be bound is small and pressed against the switch lever, the upper surfaces of the corners of the materials to be bound are prevented from engaging with the pressing projections and bending upward. . Therefore, it is possible to prevent the defective pressing of the switch lever from occurring due to the corners curling and bending.

[0008]

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

FIG. 1 shows a main part of an electric stapler. This electric stapler has a base 2 having a clincher 1 at the front end.
And a magazine 3 for ejecting staples toward the clincher 1 and an electric motor (not shown) for rotationally driving the magazine 3, and a driver 5 is mounted on the front end of the magazine 3 so as to be vertically movable. In addition, a staple (not shown) is loaded, and the drive mechanism of the driver 5 (not shown) is actuated by the rotational force of the electric motor to bind the stapled material 6 set on the clincher 1.

A start switch 7 is arranged at the rear of the clincher. This start switch 7
As shown in FIG. 2 and FIG. 4, it is composed of an input switch 7a fixed on the base 2 and a switch lever 7b for performing an input operation of the input switch 7a. The input switch 7a is fixed to a switch holder 8 integrally provided on the base 2. This switch holder 8 is the base 2
At the center of the substrate 9 fixed to the two rising plates 10, 1
The input switch 7a is fixed to the upper end portion of the longer standing plate 10 so that the movable contact portion 12 faces forward. In addition, the rising plate 1
An elongated hole 13 is formed in the lower part of 0 and 11 in the vertical direction.

The switch lever 7b has an abutting portion 16 for the material 6 to be bound above a box-shaped portion 15 having protruding shafts 14 on both sides.
And the elastic switch pressing piece 17 of the input switch 7a is located behind the contact portion 16, and
A coil spring 19 is provided between the box-shaped portion 15 and the substrate 9 of the switch holder 8, and the protruding shaft 14 of the box-shaped portion 15 is engaged with the elongated hole 13 of the switch holder 8. The switch pressing piece 17 is arranged so as to face the movable contact portion 12 of the input switch 7a. Therefore, due to the coil spring effect, the switch lever 7b can be moved in the vertical direction, the contact portion 16 is constantly biased so as to project above the clincher 1 of the base 2, and the front-back direction around the projecting shaft 14 is the center. The switch pushing piece 17 is normally urged in a direction away from the movable contact portion 12. With this structure, the switch lever 7b of the start switch 7 is pressed by the lower surface of the magazine 3 when the magazine 3 is lowered during the stapling operation and moves downward, so that even if the switch lever 7b is arranged in the center, it has no effect on the spelling work. Never.

Next, the contact portion 16 of the switch lever 7b
Is composed of an abutment surface portion 16a formed at a right angle to the supply direction of the material to be bound 6, and an angular relief portion 16b that allows the corner portion 6a of the material to be bound 6 to escape. The corner relief portion 16b is a support surface 20 that supports the lower surface of the corner portion 6a of the material 6 to be bound, and a divergent end that is formed upright from the support surface 20 to receive both end surfaces of the corner portion 6a of the material 6 to be bound. It is formed by a pair of upright walls 21. The tips of both standing walls 21 are open. Further, on the inner side surface of the upright wall 21, there are formed pressing ridges 22 that engage with the upper surfaces of both side ends of the corner portions 6a of the material 6 to be bent and prevent the bending.

With the above construction, the material 6 to be bound at the time of binding
1 is pushed between the magazine 3 and the clincher 1 of the base 2 as shown in FIG. 1, its end abuts against the abutment surface portion 16a of the abutment portion 16 of the start switch 7 and swings. The switch pushing piece 17 pushes the movable contact portion 12 of the input switch 7a to perform an input operation. As a result, the switch of the electric motor is turned on, the driver 5 is driven, and the binding operation of the material 6 to be bound is performed. When the bound material 6 that has been bound is taken out, the switch pressing piece 17 is restored by its elasticity and separated from the movable contact portion 12, and the switch lever 7b is rocked and returned to the initial position.

The above-mentioned switch operation is performed at the corner portion 6 of the material 6 to be bound.
The same applies when binding a, but in this case, as shown in FIG. 2, the corner 6a of the material 6 to be bound is the switch lever 7
It is inserted into the corner relief portion 16b of the contact portion 16 of b. The lower surface of the corner portion 6a of the material 6 to be stitched inserted into the corner relief portion 16b is supported by the support surface 20. Both end surfaces of the corner portion 6 a contact the inner side surface of the standing wall 21. In addition, the upper surfaces of both ends of the corner portion 6a are engaged with the pressing projections 22 inside the standing wall 21 (see FIG. 3). For this reason, when the number of the stapled members 6 is small and pressed against the switch lever 7b, the upper surface of the corner 6a of the stapled member 6 engages with the pressing projection 22 and bends upward. Is suppressed. Therefore, it is possible to prevent the defective pressing of the switch lever 7b from occurring due to the corner portion 6a curling and bending. Of course, when the number of the materials 6 to be bound is large, there is no problem because the rigidity of the entire material 6 to be bound is large.

When the magazine 3 moves up and down during the stapling operation, this up and down movement is absorbed by the coil spring 19 of the start switch 7.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an electric stapler according to the present invention.

FIG. 2 is a perspective view of a start switch.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is an exploded perspective view of the start switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clincher 2 Base 3 Magazine 5 Driver 6 Stitched material 6a Corner part 7 Start switch 7b Switch lever 16 Contact part 16b Corner relief part 20 Support surface 21 Standing wall 22 Pressing ridge

Claims (1)

[Scope of utility model registration request] 1. A base having a clincher portion at a front end, a magazine for ejecting staples toward the clincher portion, and an electric motor for rotationally driving the magazine are provided, and the base is provided at a rear position of the clincher. An input switch fixed on the table and a switch lever for abutting the material to be bound supplied at the time of binding to perform the input operation of the input switch are provided, and the switch lever is normally separated from the input switch and is provided from the clincher portion. In a start switch of an electric stapler, which is urged in a direction projecting upward and arranged so that a material to be bound supplied at the time of binding presses an abutting portion of an input switch, the binding material abutting portion of the switch lever is provided. Is formed with a corner relief portion for escaping the corner portion of the material to be bound, and the corner relief portion serves as a support surface for supporting the lower surface of the corner portion of the material to be bound. It is formed from a pair of erected walls which are erected from the support surface and which receive both end faces of the corners of the material to be bound, and the inner surface of the wall has a corner portion of the material to be bound supplied. A start switch for an electric stapler, characterized in that a pressing ridge is formed to engage with the upper surfaces of both ends to prevent the bending.