JP3250293B2 - Electric pencil sharpener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pencil sharpener provided with an interlock mechanism for improving safety.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view of a conventional electric pencil sharpener.
FIG. 6 is a longitudinal sectional view of a conventional electric pencil sharpener, and FIG. 7 is a partially cutaway plan view showing an interlock mechanism of the conventional electric pencil sharpener. In FIGS. 5, 6, and 7, case 1
A pencil insertion port 2 is provided at the upper part of the box, and when the pencil is inserted through the slot 2, the switch lever 3 and the switch lever 4 are operated in conjunction with each other to operate the power switch 5, and the motor 6 rotates.
The rotation of the motor 6 is performed by the cutter 14 via the gears 11 to 13.
Is transmitted to the cutter holder 7 provided with the cutting tool, and cuts the pencil. Reference numeral 10 denotes a spring for urging the switch lever 3.

In this case, since the cutter holder 7 is dangerous because it has the cutter 14, the cutter holder 7 is protected by the receiving box 8 mounted on the outer surface of the case 1, and when the receiving box 8 is not mounted. Has an interlock mechanism that does not turn on even if a pencil is inserted. That is, in FIG. 7, when the receiving box 8 is mounted on the case 1, the position of the switch lever 3 is regulated by the rib 9 protruding from the inner surface of the receiving box 8, and the switch lever 3 does not escape in the direction c. The power switch 5 can be turned on by pressing the switch lever 4 with its tapered surface.
When it is removed from the position, the position regulation by the rib 9 is gone,
The switch lever 3 escapes in the direction c, the power switch 5 is turned off, and the rotation of the cutter 14 stops.

[0004]

However, in the above-mentioned conventional configuration, many parts such as the switch lever 3, the switch lever 4, and the spring 10 are required, and the operation failure due to the variation of the parts, the assembly cost, and the component cost are increased. There were problems such as.

Accordingly, an object of the present invention is to provide a safe electric pencil sharpener having a reduced number of parts and a stable interlock mechanism.

[0006]

For this purpose, in the electric pencil sharpener according to the present invention, the position of the switch lever is regulated by a rib protruding from the inner surface of the receiving box while the receiving box is mounted on the case. This allows the switch lever to move only in the direction that activates the power switch, and with the receiving box removed from the case, releases the restriction on the position of the switch lever by the rib, which activates the power switch. Rotate in the direction to escape from the position
And moved in that direction .

[0007]

According to the above construction, the switch lever pressed by the pencil directly operates the power switch, thereby preventing malfunction due to variation in parts and removing the receiving box.
In this state, even if a pencil is inserted, the power is not turned on and it is safe.

[0008]

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

FIG. 1 is a perspective view of an electric pencil sharpener according to an embodiment of the present invention.
2 is detachably mounted, and a receiving box 22 is formed with a pencil insertion opening 23. Reference numeral 24 denotes a power supply cord derived from the case 21, and a power supply plug 25 is connected to a distal end thereof.

FIG. 2 is a cross-sectional view of an electric pencil sharpener according to an embodiment of the present invention. A cutter holder 26 and a cutter 27 are provided inside the insertion port 23. A motor 28 is provided inside the case 21,
The rotation is transmitted to the cutter holder 26 via the gears 29, 30, 31. Further, on the side of the cutter holder 26, a chip collecting chamber 32 is provided.

A switch lever 33 is provided inside the receiving box 22. The side shape of the switch lever 33 is substantially U-shaped, and the tip of the
And a rear end thereof is located in front of a power switch 35 disposed below the motor 28. A portion near the tip of the switch lever 33 is held by a spring 37. FIG. 4A is a partially cutaway plan view showing a holding structure of a switch lever of the electric pencil sharpener according to one embodiment of the present invention, and FIG. 4B is a plan view of the electric pencil sharpener according to one embodiment of the present invention. FIG. 4 is a partially cutaway front view showing a switch lever holding structure. 4 (a) and 4 (b), the base end of the switch lever 33 is resiliently held by a spring 37. The switch lever 33 is provided in the case 21 by a spring force of the spring 37 to expand. It is held while being pressed in the walls 41 and 42.

A switch lever 33 is provided on the inner surface of the receiving box 22.
The rib 36 for regulating the position is projected. With the receiving box 22 mounted, the switch lever 33 is moved to the receiving box 2.
The position of the rib 36 is regulated by the second rib 36,
It is pressed down while holding a gap of about 0.5 mm.

This pencil sharpener is constructed as described above, and the handling operation will now be described. When the pencil 34 is inserted from the insertion slot 23 with the receiving box 22 attached to the case 21 as shown in FIG. 2, the switch lever 33 is pushed by the pencil 34 and moves in the d direction to turn on the power switch 35. ,
The motor 28 rotates. This rotation is transmitted to the cutter holder 26 via the gears 29 to 31, and the pencil 27 is cut by the cutter 27.

FIG. 3 is a cross-sectional view of the electric pencil sharpener according to one embodiment of the present invention with the receiving box removed. FIG.
When the pencil 34 is inserted in the state of, the position restriction state of the switch lever 33 by the rib 36 is released.
It moves in the g direction while rotating in the f direction with the part as a fulcrum, but the rear end escapes from the position in front of the power switch 35, that is, the position for activating the power switch 35 due to the rotation in the f direction. The power switch 35 is not turned on, and the motor 28 does not rotate. Thus, even if the pencil 34 is inserted with the receiving box 22 removed from the case 21, the cutter 27 does not rotate, so that it is extremely safe.

[0015]

As described above, according to the present invention, since the switch lever is moved away from the position for activating the power switch when the receiving box is removed from the case, the receiving box is removed. When the pencil is inserted, the power switch is not turned on even when the pencil is inserted, so that a safe electric pencil sharpener in which the cutter does not rotate can be obtained. In addition, since the switch lever pressed by the pencil directly operates the power switch, it is possible to prevent malfunction due to variations in parts, and to reduce the number of parts, thereby reducing assembly costs and parts costs.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric pencil sharpener according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an electric pencil sharpener according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the electric pencil sharpener according to the embodiment of the present invention with a receiving box removed.

FIG. 4 (a) is a partially cutaway plan view showing a holding structure of a switch lever of the electric pencil sharpener according to one embodiment of the present invention. FIG. 4 (b) is a switch of the electric pencil sharpener according to one embodiment of the present invention. Partially cutaway front view showing lever holding structure

FIG. 5 is a perspective view of a conventional electric pencil sharpener.

FIG. 6 is a longitudinal sectional view of a conventional electric pencil sharpener.

FIG. 7 is a partially cutaway plan view showing an interlock mechanism of a conventional electric pencil sharpener.

[Explanation of symbols]

 21 Case 22 Receiving Box 23 Insertion Slot 26 Cutter Holder 27 Cutter 28 Motor 33 Switch Lever 35 Power Switch 36 Rib 37 Spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-71900 (JP, A) Japanese Utility Model Sho 55-179894 (JP, U) Japanese Utility Model Utility Model Sho 55-78492 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B43L 23/02

Claims (1)

(57) [Claims] 1. A motor, a cutter driven and rotated by the motor, a power switch of the motor, a case accommodating the motor, the cutter and the power switch, and a receiving box detachably mounted on the case. An insertion opening for inserting a pencil into the cutter side, a switch lever interposed between the insertion opening and the power switch and held by a spring, and the switch protruding from the inner surface of the receiving box. A rib for regulating the position of the lever, and in a state where the receiving box is mounted on the case, by regulating the position of the switch lever with the rib, only in a direction in which the switch lever operates the power switch. By moving, and in a state where the receiving box is removed from the case, by releasing the position restriction of the switch lever by the rib, Furthermore the switch lever is rotated in a direction to escape from a position for operating the power switch
An electric pencil sharpener characterized by moving in that direction .