JP2008137206A - Pencil sharpener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motorized pencil sharpener which can prevent the cutting accident of a finger with a cutter from developing so that the cutter does not activate when an infant inserts a finger for fun in a pencil sharpening hole. <P>SOLUTION: In the motorized pencil sharpener, in which the cutter rotatable with a motor is equipped within the pencil sharpening hole so as to automatically sharpen the tip part of the pencil with the cutter when the pencil is inserted in the pencil sharpening hole, a safety mechanism for preventing a finger inserted in the pencil sharpening hole from being injured by stopping the rotation of the cutter is provided or an infant protecting switch for allowing to put a motor-turning circuit into an OFF state is provided as the safety mechanism. In addition, a use-switch, which can activate the cutter by turning the circuit into an ON state even under the state that the infant protecting switch has made the circuit into the OFF state, is annexed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pencil sharpener, and more particularly, to an electric pencil sharpener capable of preventing an accident that an infant is injured by inserting a finger into a pencil sharpening hole.

  The conventional electric pencil sharpener is configured such that when a pencil is inserted into a pencil sharpening hole, a switch of a motor that rotates the cutter is turned on, and the cutter automatically rotates to sharpen the pencil.

  By the way, recently, there are many accidents in which an infant inserts his / her finger into the paper insertion slot of the shredder and the finger is cut off, and urgent safety measures are demanded.

In the case of the electric pencil sharpener, there is a possibility that the infant inserts his / her finger into the pencil sharpening hole in the same manner as the shredder.
When the finger is inserted into the pencil sharpening hole, the cutter automatically rotates as described above, and there is a risk that the finger is cut by the cutter.

  Therefore, even in the case of an electric pencil sharpener, it is required to be provided with means capable of preventing the above danger.

  Conventionally, an electric pencil sharpener configured to prevent injury by touching a cutter by inserting a finger into a space after drawing out a box storing pencil shavings is disclosed in Patent Documents 1 to 4 is known.

Japanese Patent No. 3758270

Utility Model Publication No.57-34080

Utility Model Publication No. 52-15870

Utility Model Publication No.49-17067

  However, there has not been a pencil sharpener that can prevent an infant from being injured by inserting a finger into the pencil sharpening hole by mischief.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electric pencil sharpener that can prevent an accident that the cutter does not operate when the infant inserts a finger into the pencil sharpening hole by mischief and the finger is cut by the cutter.

  In order to solve the above-described problem, the pencil sharpener according to the first aspect of the present invention is equipped with a cutter that can be rotated by a motor inside the pencil sharpening hole, and when a pencil is inserted into the pencil sharpening hole. An electric pencil sharpener configured so that the tip of the pencil is automatically sharpened by the cutter, the rotation of the cutter being stopped, and the injury of the finger inserted into the pencil sharpening hole A safety mechanism that can be prevented is provided.

  That is, in the pencil sharpener according to the present invention, the safety mechanism can stop the cutter from rotating and prevent an infant from being injured by inserting a finger into the pencil sharpening hole.

  In the pencil sharpener according to the present invention, the safety mechanism is provided with an infant protection switch capable of turning off a circuit for rotating the motor.

  That is, in the pencil sharpener according to the present invention, the infant protection switch is provided in order to easily operate the safety mechanism. Therefore, safety is easily ensured by turning off the circuit for rotating the motor by the infant protection switch.

  Further, the pencil sharpener according to the present invention is provided with a use switch that can operate the cutter by turning on the circuit even when the infant protection switch is in the state of turning off the circuit. It is characterized by being.

  That is, in the pencil sharpener according to the present invention, in order to protect the infant, if the infant protection switch is always in the OFF state, an inconvenience that an adult cannot sharpen the pencil is avoided. Therefore, the use switch is provided. If this use switch is turned on, the pencil can be sharpened by operating the cutter even if the infant protection switch is in the OFF state.

  The pencil sharpener according to the present invention is characterized in that the pencil sharpening hole and the use switch are arranged on the front surface of the main body case, and the infant protection switch is arranged on the rear surface of the main body case. And

  That is, in the pencil sharpener according to the present invention, the infant protection switch is arranged on the back surface of the main body case so that an infant is difficult to tamper with the infant protection switch.

  Further, the pencil sharpener according to the present invention includes, inside the main body case, the cutter, a motor that can rotate the cutter, a circuit that can supply current from the power source to the motor, and the pencil sharpening hole. An operation switch that can turn on the circuit when a pencil is inserted and can turn off the circuit when the pencil is pulled out from the pencil sharpening hole. And the operation switch is provided in the circuit.

  That is, in the pencil sharpener according to the present invention, by providing the above components, the pencil can be automatically sharpened with a simple configuration, and the infant inserts a finger into the pencil sharpening hole. You can also prevent the cutter from rotating.

  The pencil sharpener according to the present invention is characterized in that, in the circuit, the infant protection switch is connected in series to the operation switch, and the use switch is connected in parallel to the infant protection switch. And

That is, in the pencil sharpener according to the present invention, since the infant protection switch is connected in series to the operation switch, if the infant protection switch is turned off, the circuit is also turned off. The rotation of the cutter can be stopped.
In addition, since the use switch is connected in parallel to the infant protection switch, even if the infant protection switch is in the OFF state, the use switch is turned on to close the circuit, thereby the cutter. Rotate the and you can sharpen the pencil without any trouble.

  In addition, the pencil sharpener according to the present invention is provided with a shaving storage box that can be attached to and detached from the main body case, and the circuit is turned off with the shaving storage box removed from the main body case. A safety switch capable of turning on the circuit in a state where the shavings storage box is mounted on the main body case is provided.

That is, in the pencil sharpener according to the present invention, when the shavings storage box is removed from the main body case, an infant inserts a finger into the subsequent space and puts the finger on the exposed cutter. It also has means to prevent accidents that could result in injury.
Therefore, it is possible to avoid both the risk of injury by inserting a finger into the pencil sharpening hole and the risk of injury by inserting a finger into the space after removing the shaving storage box, which is extremely safe. .

  The pencil sharpener according to the present invention as set forth in claim 1 is equipped with a cutter that can be rotated by a motor inside the pencil sharpening hole, and when a pencil is inserted into the pencil sharpening hole, the tip of the pencil by the cutter Is an electric pencil sharpener configured to be automatically sharpened, and is provided with a safety mechanism capable of preventing the injury of a finger inserted into the pencil sharpening hole by stopping the rotation of the cutter. Therefore, even if an infant is mischievous or mistakenly inserts a finger into the pencil sharpening hole, the rotation of the cutter is stopped by the safety mechanism, so the finger is cut by the cutter. Can be reliably prevented.

  In the pencil sharpener according to the second aspect of the present invention, since the safety mechanism is provided with an infant protection switch capable of turning off a circuit for rotating the motor, the infant protection switch is operated. By doing so, the rotation of the cutter can be easily stopped.

  The pencil sharpener according to the third aspect of the present invention is provided with a use switch that can operate the cutter by turning on the circuit even when the infant protection switch is in the state of turning off the circuit. Therefore, when an adult uses it, the pencil can be sharpened without any trouble by operating the use switch.

  In the pencil sharpener according to the present invention as set forth in claim 4, the pencil sharpening hole and the use switch are disposed on the front surface of the main body case, and the infant protection switch is disposed on the rear surface of the main body case. Therefore, it becomes difficult for an infant to easily release the state where the rotation of the cutter is stopped by the infant operating the infant protection switch disposed on the back surface of the main body case.

  According to a fifth aspect of the present invention, there is provided a pencil sharpener including a cutter, a motor capable of rotating the cutter, a circuit capable of supplying a current from a power source to the motor, and the pencil. An operation switch is provided that can turn on the circuit when a pencil is inserted into the sharpening hole and can turn the circuit off when the pencil is pulled out of the pencil sharpening hole. Since the use switch and the operation switch are provided in the circuit, a system for operating the safety mechanism can be easily configured.

  The pencil sharpener according to the present invention as set forth in claim 6 is characterized in that, in the circuit, the infant protection switch is connected in series to the operation switch, and the use switch is connected in parallel to the infant protection switch. Therefore, the rotation of the cutter can be reliably stopped by turning off the infant protection switch, and the cutter can be reliably rotated by turning on the use switch.

  The pencil sharpener according to the present invention described in claim 7 is provided with a shavings storage box that is detachable from the main body case, and the circuit is turned off in a state where the shaving storage box is detached from the main body case. And a safety switch that can turn on the circuit in a state where the shavings storage box is attached to the main body case, the motor in the state that the shavings storage box is removed from the main body case. Therefore, it is possible to prevent an accident that an infant is injured by inserting a finger into the space after the shavings storage box is removed from the main body case and touching the cutter.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 2, the pencil sharpener 11 according to the present embodiment is equipped with a cutter 25 that can be rotated by a motor 27 inside the pencil sharpening hole 14, and a pencil is inserted into the pencil sharpening hole 14. Furthermore, the electric pencil sharpener 11 is configured so that the tip of the pencil is automatically sharpened by the cutter 25, and as shown in FIGS. 2 and 4, the rotation of the cutter 25 is stopped. Thus, a safety mechanism 33 that can prevent injury of the finger inserted into the pencil sharpening hole 14 is provided.
As shown in FIGS. 2 and 4, the safety mechanism 33 is provided with an infant protection switch 22 that can turn off the circuit 31 that rotates the motor 27.
Further, as shown in FIGS. 1 and 4, even when the infant protection switch 22 is in a state in which the circuit 31 is in an OFF state, the use switch that can operate the cutter 25 with the circuit 31 in an ON state. 18 is attached.
As shown in FIGS. 1 and 2, the pencil sharpening hole 14 and the use switch 18 are disposed on the front surface portion 13 of the main body case 12, and the infant protection switch 22 is disposed on the rear surface portion 21 of the main body case 12. Is arranged.
As shown in FIGS. 3 and 4, the body case 12 includes a cutter 25, a motor 27 that can rotate the cutter 25, and a circuit 31 that can supply current to the motor 27 from a power source. An operation switch 29 that turns on the circuit 31 when a pencil is inserted into the pencil sharpening hole 14 and turns off the circuit 31 when the pencil is pulled out of the pencil sharpening hole 14. The infant protection switch 22, the use switch 18 and the operation switch 29 are provided in the circuit 31.
As shown in FIG. 4, in the circuit 31, the infant protection switch 22 is connected in series to the operation switch 29, and the use switch 18 is connected in parallel to the infant protection switch 22.
As shown in FIGS. 1, 3, and 4, a shaving storage box 15 that is detachable from the main body case 12 is provided, and the shaving storage box 15 is detached from the main body case 12. The safety switch 33 is provided to turn the circuit 31 on in a state where the circuit 31 is turned off and the shaving storage box 15 is attached to the main body case 12.

The figure shows a pencil sharpener 11 according to the embodiment.
As shown in FIG. 1, the pencil sharpener 11 according to the present embodiment has a substantially rectangular parallelepiped main body case 12, and a pencil sharpening hole 14 is formed at a position near the right end of the upper half of the front portion 13 of the main body case 12. Is provided.
The pencil sharpener 11 is configured to automatically sharpen a pencil by inserting a pencil tip into the pencil sharpening hole 14.

In the front portion 13 of the main body case 12, a shaving storage box 15 for storing pencil shavings is disposed below the pencil shaving hole 14, as shown in FIG.
The shavings storage box 15 is configured to be drawable from the main body case 12, and is provided with a shaving hole 16 for color pencils used for manual operation when shaving colored pencils or the like.
A cutter is fixed to the inside of the colored pencil sharpening hole 16, and the colored pencil or the like can be sharpened by inserting the colored pencil or the like and manually rotating the colored pencil or the like.

  Further, at the lower end of the front portion 13 of the main body case 12, a recess 17 is provided in the left part of the shaving storage box 15, as shown in FIG. Is provided.

Further, as shown in FIG. 1, a rotatable adjustment dial 20 for adjusting the thickness of the pencil lead is provided at a position near the rear end of the upper surface portion 19 of the main body case 12.
The mechanism and action of the adjustment dial 20 are the same as those employed in a general pencil sharpener, and will not be described in detail. A slider (not shown) disposed in the inner part of the shaving hole 14 is provided, and the slider is moved in the depth direction of the pencil shaving hole 14 to regulate the position of the lead of the pencil. It is configured so that the thickness can be adjusted.

Next, as shown in FIG. 2, an infant protection switch 22 is provided at the center in the width direction at the lower end of the back surface 21 of the main body case 12.
The infant protection switch 22 is provided as a safety mechanism 33 that can prevent injury even if an infant inserts a finger into the pencil sharpening hole 14.
The infant protection switch 22 is a slide type, and is configured to be in an “ON” state when moved to the right and to be in an “OFF” state when moved to the left.

Further, as shown in FIG. 2, a power cord 23 is provided at the right side of the infant protection switch 22 in the back surface portion 21. As shown in FIG. 4, a plug 24 that can be plugged into an outlet is attached to the tip of the power cord 23.
Further, the back surface portion 21 is provided with a broken core removal button 32 for removing a broken core clogged in the back of the pencil sharpening hole 14. Although not shown in the drawing, a pin that can penetrate the pencil sharpening hole 14 and come into contact with the broken core is connected to the broken core removal button 32.

As shown in FIG. 3, a cutter 25 is disposed inside the pencil sharpening hole 14 inside the main body case 12. The cutter 25 is held by a cutter mounting shaft 26.
The main body case 12 is provided with a motor 27, and the rotation of the motor 27 can be transmitted to the cutter mounting shaft 26 via a gear mechanism 28.

Further, as shown in FIG. 3, an operation switch 29 is disposed inside the pencil sharpening hole 14.
The operation switch 29 is configured to be turned on when the tip of the pencil is inserted into the pencil sharpening hole 14 and to be turned off when the pencil is extracted from the pencil sharpening hole 14. Has been.

  Further, as shown in FIG. 3, the main body case 12 is turned off when the shaving storage box 15 is detached from the main body case 12, and the shaving storage box 15 is placed in the main body case. 12 is provided with a safety switch 30 that is turned on in the state of being attached to the motor 12.

Further, as shown in FIG. 4, a circuit 31 for connecting the power cord 23, the motor 27, the operation switch 29, and the safety switch 30 is formed inside the main body case 12.
The circuit 31 is also provided with the infant protection switch 22 and the use switch 18.

  As shown in FIG. 4, in the circuit 31, the operation switch 29, the safety switch 30 and the infant protection switch 22 are connected in series, and the use switch 18 and the infant protection switch 22 are connected in parallel. .

Next, the operation of the above embodiment will be described.
First, when the tip of a pencil is inserted into the pencil sharpening hole 14, the operation switch is turned on, the motor 27 rotates, and the cutter 25 is also transmitted with the rotation of the motor 27. Rotate and sharpen the pencil.
On the contrary, when the pencil is pulled out of the pencil sharpening hole 14, the operation switch is turned OFF, the motor 27 is rotated, and the cutter 25 is stopped.

As described above, when the tip of the pencil is inserted into the pencil sharpening hole 14, the operation switch is turned on and the motor 27 is rotated, and the cutter 25 is also rotated. The same operation occurs when inserted. Therefore, there is a risk that the finger is cut by the cutter 25.
This danger can be eliminated by turning off the infant protection switch 22. That is, since the infant protection switch 22 and the operation switch 29 are connected in series, when the infant protection switch 22 is turned off, the circuit 31 is also turned off and the motor 27 and the cutter 25 are not operated. Therefore, even if an infant inserts a finger into the pencil sharpener hole 14, it is safe without being injured.

In order to protect the infant, if the infant protection switch 22 is left in the OFF state, it cannot be used by an adult, which is inconvenient. In order to eliminate this inconvenience, the use switch 18 is provided.
Since the use switch 18 and the child protection switch 22 are connected in parallel, the circuit 31 is closed when the use switch 18 is turned on even if the child protection switch 22 is maintained in the OFF state. The motor 27 and the cutter 25 can be rotated, and the pencil can be sharpened without hindrance.

Further, when the shavings storage box 15 is removed from the main body case 12, the cutter 25 is exposed in the subsequent space. Therefore, even when an infant inserts a finger into the space, the finger touches the cutter 25. There is a risk of injury.
However, in the pencil sharpener 11 according to the present embodiment, the safety switch 33 is provided in series with the operation switch 29, and when the shaving storage box 15 is removed from the main body case 12, the safety switch 33 is activated. Since it is configured to be turned off, the motor 27 and the cutter 25 do not rotate when the shavings storage box 15 is removed from the main body case 12. Therefore, even if an infant inserts a finger into the space after removing the shavings storage box 15 from the main body case 12 and touches the cutter 25 with a finger, there is no risk of injury.

  The present invention is applicable to a pencil sharpener, particularly an electric pencil sharpener.

It is a perspective view of the front side of the pencil sharpener which concerns on the Example of this invention. It is a perspective view of the back side of the pencil sharpener which concerns on the Example of this invention. 1 is a schematic cross-sectional view of a pencil sharpener according to an embodiment of the present invention. It is a circuit diagram of a pencil sharpener according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Pencil sharpener 12 Main body case 13 Front part 14 Pencil sharpening hole 15 Shavings storage box 16 Pencil sharpening hole 17 such as colored pencils Recessed part 18 Used switch 19 Upper part 20 Adjustment dial 21 Rear part 22 Infant protection switch 23 Power cord 24 Plug 25 Cutter 26 Cutter mounting shaft 27 Motor 28 Gear mechanism 29 Operation switch 30 Safety switch 31 Circuit 32 Broken core exclusion button 33 Safety mechanism

Claims (7)

A motorized cutter is equipped inside the pencil sharpening hole, and when the pencil is inserted into the pencil sharpening hole, the electric tip is configured so that the tip of the pencil is automatically sharpened by the cutter. A pencil sharpener,
A pencil sharpener characterized in that a safety mechanism capable of stopping the cutter rotation and preventing injury of a finger inserted into the pencil sharpening hole is provided.   The pencil sharpener according to claim 1, wherein the safety mechanism is provided with an infant protection switch capable of turning off a circuit for rotating the motor.   3. The use switch according to claim 1, further comprising a use switch capable of operating the cutter while the circuit is turned on even when the infant protection switch is in a state where the circuit is turned off. The pencil sharpener described in any one of the items.   4. The pencil sharpener according to claim 3, wherein the pencil sharpening hole and the use switch are disposed on the front surface of the main body case, and the infant protection switch is disposed on the rear surface of the main body case. Inside the main body case, the cutter, a motor that can rotate the cutter, a circuit that can supply current from the power source to the motor, and the circuit are turned on when a pencil is inserted into the pencil sharpening hole. And an operation switch that can turn the circuit off when the pencil is removed from the pencil sharpening hole.
The pencil sharpener according to any one of claims 3 to 4, wherein the infant protection switch, the use switch, and the operation switch are provided in the circuit.   6. The pencil sharpener according to claim 5, wherein the infant protection switch is connected in series to the operation switch, and the use switch is connected in parallel to the infant protection switch.   A swarf storage box that can be attached to and detached from the main body case is provided, and the circuit is turned off with the swarf storage box removed from the main body case, and the swarf storage box is attached to the main body case. The pencil sharpener according to any one of claims 2 to 6, further comprising a safety switch capable of turning on the circuit in a state where the circuit is turned on.

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