JPH037196Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an electric pencil sharpener, and relates to the drive mechanism of the cutter unit and the structure of the cutting waste storage section.

(B) Prior Art A series of pencil sharpeners that use a battery as a power source to drive a motor, rotate a cutter unit by the motor, and cut a pencil using the cutter unit are known as the Utility Model No. 58-136400, for example. There is a publication. To briefly explain the configuration of such conventional technology,
A cutter unit is rotatably provided inside the main body, a motor and a battery are housed, and the rotational drive of the motor is transmitted to the cutter unit by a reduction gear, and the rotating cutter unit cuts the pencil inserted from the pencil insertion slot. This is what we do. In this example, the portion surrounded by the rotating portion of the cutter unit becomes a dead space, and the volume of the cutting waste storage portion formed on one side of the main body is reduced. Also, due to the rotation of the cutter unit, a small gap is formed between the side wall of the cutting waste storage section and the cutter unit, but if too much cutting waste accumulates, the cutting waste will enter this gap and the cutter unit will lock. There was a problem that the rotation would stop.

(c) Problems to be solved by the invention The invention eliminates the dead space and gap between the side wall of the cutting waste storage section and the cutter unit that are found in conventional pencil sharpeners as described above, and provides a pencil with a new drive mechanism. The purpose is to provide a cutting tool.

(d) Means for solving the problem An inner frame body that rotates in conjunction with the cutter unit is provided in the outer shell case, a cutting waste storage section is provided between the inner frame body and the cutter unit, and the inner frame A motor is disposed inside the body, and the drive shaft of the motor is fitted into a pinion gear that meshes with an internal gear disposed at the bottom of the case.

(E) Function Since the inner frame body rotates with the rotation of the cutter unit, the cutting waste rotates together with the cutter unit.
Furthermore, since the motor is arranged inside the inner frame and the drive shaft of the motor is fitted into a pinion gear that meshes with an internal gear disposed at the bottom of the outer case, the drive shaft of the motor can be rotated. Rotate while doing so.

(F) Embodiment Figures 1 and 2 show an embodiment of the pencil sharpener of the present invention.

1 is a synthetic resin outer shell case with a bottomed cylindrical shape; 2
3 is a cutter unit located at the center of the inner frame 2 and rotates in conjunction with the rotation of the inner frame 2; 4 is a cutter unit that is rotatably provided inside the outer shell case 1; a lid body 5 that closes the upper opening of the inner frame body 2;
is a locking frame that holds the lid body 4 above the inner frame body 2.

A support shaft 6 is erected at the bottom of the forward-rising outer shell case 1 and is inserted into a bearing metal 7, and the center portion of the bottom surface of the inner frame 2 is placed on the support shaft 6. Further, an internal gear 8 is formed around the support shaft.

Reference numeral 9 denotes a motor housed in a section 10 of the inner frame 2. Its drive shaft 11 extends downward through the bottom of the inner frame 2, and a pinion gear is attached to the lower end of the protruding drive shaft 11. 12 are fitted. This pinion gear 12 meshes with the internal gear 8.

The cutter unit 3 has a flat blade 14 fixed to a substantially conical cutter holder 13 with a screw 15. The lower end thereof is pivotally supported on the inner bottom surface of the inner frame body 2.

Reference numeral 16 denotes a switch lever into which a pencil is inserted and moved through a pencil insertion slot 17 formed approximately in the center of the lid 4, and is slidably held between the compartment 10 and the lid 4. ing.

Reference numeral 18 denotes a cutting waste storage section formed between the inner frame body 2 and the cutter unit 3, and its upper opening is covered by a storage section lid 19. Further, 20 is a battery lid that covers the battery storage portion of the inner frame body 2 (not shown).

Next, the operation of this embodiment will be explained.

When a pencil is inserted through the pencil insertion slot 17, the switch lever 16 moves and the motor 9 is driven. As the pinion gear 12 moves along the internal gear, the inner frame 2 rotates around the support shaft 6. At the same time, the cutter unit 3 also rotates to cut the pencil. When the cutting is completed, the pencil is pulled out, the drive of the motor 9 is stopped, and the storage compartment lid 19 is removed to discard the cutting waste accumulated in the cutting waste storage unit 18.

(g) Effects of the invention As explained above, the present invention provides a pencil sharpener in which a motor, a battery, a gear, and a cutter unit are housed in an outer case, and the cutter unit is rotated by the drive of the motor. An inner frame body that rotates in conjunction with the cutter unit is provided inside the case, a cutting waste storage section is provided between the inner frame body and the cutter unit, and a motor is disposed inside the inner frame body, and The drive shaft of the motor is fitted to a pinion gear that meshes with an internal gear disposed at the bottom, and an inner frame body that rotates in conjunction with the cutter unit is provided inside the outer shell case. Since the cutting waste storage section is provided between the inner frame and the cutter unit, a gap is not formed as in the conventional case, and the cutting waste moves together with the cutter unit, so even if a large amount of cutting waste accumulates in the storage section, there is no gap. The cutter unit does not lock and stop, making stable cutting possible at all times.In addition, the motor is placed inside the inner frame, and the pinion gear meshes with the internal gear located at the bottom of the case. Since the drive shaft of the motor is fitted, the outer shell case with the same storage volume can be used, compared to the case where the motor is not placed inside the inner frame as described in, for example, Japanese Utility Model Publication No. 37-10424. If so, the invention of the present invention allows the diameter of the internal gear to be made larger, and as a result, it is possible to obtain a larger reduction ratio and the cutting force can be increased.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of the pencil sharpener of the present invention, and FIG. 2 is a schematic perspective view thereof. 1...Outer shell case, 9...Motor, 8, 12...
...Gear, 3...Cut unit, 2...Inner frame,
18...Cutting waste storage section.

Claims (1)

[Scope of utility model registration request] A pencil sharpener in which a motor, a battery, a gear, and a cutter unit are housed in an outer case, and the cutter unit is rotated by driving the motor, and an inner frame body that rotates in conjunction with the cutter unit is provided in the case. A cutting waste storage section is provided between the inner frame body and the cutter unit, and a motor is disposed inside the inner frame body, and the motor is attached to a pinion gear meshing with an internal gear disposed at the bottom of the case. A pencil sharpener characterized by a fitted drive shaft.