WO2012081408A1

WO2012081408A1 - Electric pencil sharpener

Info

Publication number: WO2012081408A1
Application number: PCT/JP2011/077751
Authority: WO
Inventors: 武司斎藤
Original assignee: カール事務器株式会社
Priority date: 2010-12-17
Filing date: 2011-12-01
Publication date: 2012-06-21
Also published as: CN203623249U; JP5875526B2; JPWO2012081408A1

Abstract

Provided is an energy-saving electric pencil sharpener capable of sharpening the lead tip to a predetermined diameter. An electric pencil sharpener (1) for sharpening a pencil inserted into a cylindrical member (20) with a cutting blade (30), comprises a detection unit to detect the accession of the lead tip of the pencil inserted into the cylindrical member, to a predetermined position, wherein the detection unit is constituted by comprising a lead tip adjusting mechanism which comprises: a contact member (40) to be in contact with the lead tip of the pencil; a moving member (50) which is provided with an inclined surface (52) and which moves in the direction perpendicular to the pencil insertion direction; and a switching member (60) connected to a drive unit for driving the cutting blade, while the switch member is in contact with the inclined surface (52) and biased toward the moving member (50), so that the cutting blade is deactivated when the contact member is pressed.

Description

Electric pencil sharpener

The present invention relates to an electric pencil sharpener, and more particularly to an electric pencil sharpener that can cut to a predetermined core thickness and has an energy saving effect.

The electric pencil sharpening machine is provided with a cutting portion for shaving a pencil, a driving portion for driving the cutting portion, and a waste storage portion for receiving cutting waste in a housing having a pencil insertion port. Configured
The cutting portion is configured by attaching a cylindrical member for inserting and holding a pencil, and a cutting blade having a spiral structure for scraping the pencil, in a cylinder which rotates itself about a pencil insertion opening.
The cutting blade is disposed at an angle with respect to the tubular member so that the tip of the pencil can be sharpened and cut. A planetary gear is provided at the base of the cutting blade, and by meshing with an internal gear provided on the inner periphery of the cylinder, while the cylinder rotates in the opposite direction to the cylinder, the pencil rotates It is supposed to move around.

The inner periphery of the cylindrical member is reduced in diameter toward the tip in accordance with the sharpness of the pencil, and a slit is provided in the reduced diameter portion.
The cutting blade is attached so that the portion exposed through the slit abuts on the cutting edge when the pencil is inserted into the cylindrical member and brought into contact with the reduced diameter portion, and along with the rotation of the cylinder When the cutting blade rotates around the pencil, while the cutting blade itself is also rotated by the planetary gear, it moves around the cylindrical member and cuts the pencil portion exposed from the slit.

The power supply for rotating the cylinder and driving the cutting part is turned on by inserting a pencil and designed to become OF by extracting it. In such an electric pencil sharpener, a waste storage box is used. There has been proposed a technology for automatically turning off the power when the is removed (see Patent Document 1).
Further, a technology for providing a function of adjusting the thickness of the core tip has also been proposed (see Patent Document 2).

JP 2000-255195 A Japanese Patent Laid-Open No. 6-210995

In the above-mentioned electric pencil sharpener, after inserting the pencil into the cylindrical member, it recognizes that the pencil has been shaved from the insertion time and the cutting sound as a clue, and the pencil is extracted, but the timing of extraction is I didn't know, and I had to remove the pencil before I had finished cutting, or I had to keep driving the motor without taking it out although I had already done cutting.
For this reason, it may not be able to reduce to desired core tip thickness, or power consumption may increase.

Then, this invention aims at provision of the electric pencil sharpener which can be shaved to predetermined | prescribed core thickness and has an energy saving effect.

In order to solve the above-mentioned subject, the electric pencil sharpener concerning the present invention moves a circumference of a cylindrical member which inserts and holds a pencil in a cylinder which turns itself centering on a pencil insertion opening, and moves the pencil about the pencil And a cutting blade attached to form a cutting portion, which is exposed through a slit provided in the reduced diameter portion by pressing a pencil against the reduced diameter portion provided at the tip of the cylindrical member It is an electric pencil shaving machine which cuts a part by the cutting blade, and a detection unit is provided which detects that the core point of the pencil inserted into the cylindrical member has reached a predetermined position, and the detection unit It is characterized in that the operation of the drive unit for rotating the cylinder is stopped.

In this case, the detection unit includes a contact member with which the lead end of the pencil inserted into the cylindrical member abuts, and a moving member including an inclined surface and moving in a direction orthogonal to the pencil insertion direction And a switch member connected to a switch for stopping the operation of the drive unit in a state of being urged toward the moving member and in contact with the inclined surface. The operation of the drive unit may be stopped by pressing the contact member.

In the motorized pencil sharpener according to the present invention, the drive unit for operating the cutting unit is provided with the detection unit for detecting that the core point of the inserted pencil has reached a predetermined position. By pressing while cutting against the diameter reducing portion of the end of the cylindrical member, the detecting portion detects that the core tip appearing from the end of the diameter reducing portion has reached a predetermined position, and the operation of the cutting portion can be stopped. . As a result, it is possible to cut the pencil to a predetermined thickness with minimum power required.

1 is a front view of an electric pencil sharpener according to an embodiment of the present invention. It is a side view of the above-mentioned electric pencil sharpener. It is the figure which looked at the said electric pencil sharpener from the upper surface. It is an AA line arrow directional cross-sectional view of the above-mentioned electric pencil sharpener. It is a BB line arrow principal part sectional view of the above-mentioned electric pencil sharpener. It is a perspective view which shows the cutting part and core tip contact member of the said electric pencil sharpener. It is an explanatory view showing the core point adjustment mechanism of the above-mentioned electric pencil shaving machine, and (a) is a state which is changing core tip thickness, when making a core tip thinnest, (c), a core tip Indicates the case of the largest thickness. It is a perspective view which shows the moving member of the said electric pencil shaving machine, (a) shows the state seen from the cutting part side, (b) shows the state seen from the switch member side.

Preferred embodiments of the present invention will be described based on the attached drawings. The embodiments are not limited to the following embodiments, and other embodiments can be implemented as long as the problems of the present invention can be solved.

FIG.1, FIG.2, FIG.3 is the front view, side view, and top view which show the electric pencil sharpener 1 which concerns on embodiment of this invention.
The electric pencil sharpener 1 is capable of adjusting the degree of sharpening of a pencil, and as shown in FIGS. 4 and 5, a cutting portion for sharpening a pencil in a housing 3 having a pencil insertion opening 2 A drive unit 5 for driving the cutting unit 4 and a waste storage unit 6 for receiving cutting waste are provided. On the upper surface of the housing 3, a switching operation unit 7 for switching the core-to-point thickness is provided.

As shown in FIG. 6, the cutting unit 4 is configured by attaching a cylindrical member 20 for inserting and holding a pencil and a cutting blade 30 having a spiral structure for shaving a pencil in the cylinder 10. .
The cylinder 10 is rotated about the pencil insertion opening 2 by a motor provided in the drive unit 5. On the inner peripheral surface of the cylinder 10, an internal gear 11 for rotating the cutting blade 30 with its own rotation is provided by meshing with the planetary gear 31 provided on the cutting blade 30 (FIG. 4). See).

A cylindrical member 20 is disposed at an axial center of the cylinder 10.
The cylindrical member 20 is reduced in diameter toward the tip, and the reduced diameter portion 21 is provided with a slit 22 (see FIG. 6). The inner circumference of the reduced diameter portion 21 is in an inclined state in accordance with the pointed condition of the pencil, and when the pencil is brought into contact with the reduced diameter portion 21, the pencil portion exposed through the slit 22 is scraped off Be Then, the scraped core tip emerges from the opening 23 at the tip.

The cutting blade 30 is configured by providing a plurality of spiral blades on the circumferential side surface of the cylindrical member, and one end portion thereof is fixed to a flange portion provided on the outer periphery of the cylindrical member 20. It is disposed in an inclined manner according to the diameter reduction state.
The other end of the cutting blade 30 is attached to the cylinder 10 via a planetary gear 31 provided at the base, and the rotation of the cylinder 10 causes its own rotation while the cylindrical member 20 rotates. It is configured to move around a pencil.

When a pencil is inserted into the cylindrical member 20 positioned at the center of the cylinder 10 and brought into contact with the reduced diameter portion 21, the portion exposed through the slit 22 abuts against the cutting edge of the cutting blade 30. , The cutting blade 30 is disposed (see FIG. 5). With this configuration, when the cylinder 10 rotates around the pencil insertion opening 2, the cylindrical member 20 as well as the cylinder 10 rotates around the pencil insertion opening 2, and along with the rotation of the cylindrical member 20, The cutting blade 30 moves while rotating around it, and it becomes possible to cut the pencil inserted into the cylindrical member 20.

Next, the configuration of the drive unit 5 for driving the cutting unit 4 by rotating the cylinder 10 will be described.
The motor for rotating the cylinder 10 is controlled by two detectors.
The first detection unit is for detecting that a pencil is inserted into the tubular member 20, and is a sensor S1 provided in the vicinity of the pencil insertion opening 2 (see FIG. 4).
The sensor S1 is configured to detect that a pencil has been inserted, turn on the drive circuit, and operate a motor for rotating the cylinder 10. Then, the power is turned to the OF by pulling out the pencil.

The second detection unit is for detecting that the pencil inserted in the cylindrical member 20 has been scraped to a predetermined thickness, and the contact member 40 with which the pencil tip of the pencil is in contact. And the second sensor S2 for stopping the operation of the motor by the pressing force of the pencil on the contact member 40.
The contact member 40 is disposed at a predetermined distance from the opening 23 at the tip of the reduced diameter portion 21 of the cylindrical member 20, and the tip contact part 41 of the tip is pushed by the tip of the pencil, It moves horizontally along the axial direction of the pencil and presses the contact point of the second sensor S2. By this, the drive circuit of the motor is opened, and the rotation of the cylinder 10 is stopped.

Such a contact member 40 is provided with a tip adjustment mechanism.
As shown in FIG. 7, this core-to-tip adjustment mechanism includes a core-to-tip contact member 42 having a core-to-tip contact portion 41 at its tip, a moving member 50 moving in a direction orthogonal to the pencil insertion direction, and the moving member A switch member 60 is provided between the sensor 50 and the sensor S2.
The tip contact portion 42 is moved in the axial direction by pressing the tip end with a tip of a pencil, and presses the moving member 50 at the rear end.

As shown in FIG. 8, the moving member 50 has a smooth inclined surface 52 on the back side of the surface 51 extending in the moving direction of the moving member 50 (that is, the direction orthogonal to the pencil insertion direction). The core tip contact member 42 is in contact with the surface 51, and the switch member 60 is in contact with the inclined surface 52 on the back side.
The inclined surface 52 is abutted when the core point is set thick, with the portion where the switch member 60 abuts (the narrow portion S with a small thickness width of the moving member 50) when the core point is set thin. It is the structure which provided the inclination part 53 between the site | parts (wide part F with large thickness width of the movement member 50) (refer FIG.7 (c)).

The switch member 60 is biased toward the moving member 50 by a spring 61 provided between the switch member 60 and the partition wall 3 a, and the switch member 60 is in contact with the inclined surface 52 of the moving member 50. It is in contact. Thus, the core tip contact member 42, the moving member 50, and the switch member 60 are arranged on the axis in a connected state, and the moving member 50 is inserted into the axis via the switching operation unit 7 on the upper surface of the housing. By being movable in the direction orthogonal to the direction, the mechanism for stopping the rotation of the cylinder 10 by opening the drive circuit of the motor can be realized with a simple configuration.

The state of use of the electric pencil sharpener 1 of the above configuration will be described.
In the initial state shown in FIG. 7A (that is, the state set to the thinnest core tip), when a pencil is inserted into the pencil insertion port 2, the drive motor for rotating the cylinder 10 by the first sensor S1 operates. Do. As the cylinder 10 rotates, the cylindrical member 20 rotates about the pencil as a central axis, and the cutting blade 30 scrapes off the portion of the pencil exposed at the moving position of the slit 22 accompanying the rotation.

By applying manual pressure to the pencil and continuing inserting, the core tip scraped from the opening 23 at the tip of the cylindrical member 20 appears and abuts on the core tip abutting part 41 of the contact member 40. In response to the pressing force, the second sensor S2 opens the drive circuit of the motor and stops the rotation of the motor.
As described above, the contact member 40 detects that the tip of the pencil inserted into the cylindrical member 20 has reached a predetermined position, and the operation of the motor is stopped by the electrical signal from the detection unit. As a result, it is possible to prevent overcutting of the core and to prevent waste of power.

When the degree of shaving of the core tip is switched from thin to thick, the moving member 50 is operated by operating the switching operation portion 7 provided on the upper surface of the electric pencil sharpener 1 in the direction of the wide portion F. It is moved in the direction X orthogonal to the axis.
Then, the moving member 50 moves itself in the direction Y approaching the cylindrical member 20 while bringing the switch member 60 into contact with the inclined surface 52.

Along with the movement of the moving member 50, the core tip contact member 42 also moves in the direction Z approaching the cylindrical member 20, and the core tip contact portion 41 at the tip is set to a predetermined thickness for thick core. It is set to the core point position.
In the present embodiment, the second detection unit is moved toward the movable member 50 provided with the inclined surface 52 and the movable member 50, and the drive circuit is opened in a state of being in contact with the inclined surface 52. , And the contact member 40 is moved in the pencil insertion direction by the operation of moving the moving member 50 in the direction orthogonal to the pencil insertion direction. This becomes possible, and it becomes possible to realize a mechanism for stopping the operation of the cutting unit 4 when it is cut to a predetermined core thickness with a simple configuration.

In the present embodiment, the second detection unit may be designed to detect that the tip of the pencil inserted in the cylindrical member 20 has reached a predetermined position, and the detection method is Not only mechanical methods, but also known methods such as electrical methods and optical methods can be used. In this case, various types of sensors such as an optical sensor having a light receiving element can be used.
In this embodiment, although it was set as the electric pencil shaving machine which has a core point adjustment function, the electric pencil shaving machine in this invention may not have a core point adjustment function. In this case, the core tip exposed from the opening 23 of the cylindrical member 20 can be configured to directly press the second sensor S2.

The present invention can be applied in all industrial fields as an electric pencil sharpener for cutting any pencil-shaped component such as pencil-shaped cosmetics.

DESCRIPTION OF SYMBOLS 1 ··· Electric pencil sharpener 2 ··· Pencil insertion port 3 ··· Body 4 ··· Cutting unit 5 ··· Drive unit 6 ··· Waste storage unit 7 ··· Switching operation unit 10 ··· Cylinder 11 ... internal gear 20 ... cylindrical member 21 ... reduced diameter portion 22 ... slit 23 ... opening 30 ... cutting edge 31 ... planetary gear 40 ... contact member 41 core tip contact portion 42 core tip contact member 50 moving member 51 surface 52 slope surface 53 slope portion 60 switch member 61 ·Spring

Claims

A cylindrical member (20) for inserting and holding the pencil in a cylinder (10) which rotates itself about the pencil insertion opening (2), and a cutting blade (30) for moving around the pencil and shaving the pencil; To form a cutting portion (4), and pressing a pencil against the reduced diameter portion (21) provided at the tip of the cylindrical member (20), the slit provided in the reduced diameter portion (21) An electric pencil sharpener (1) for shaving a portion exposed through (22) with the cutting blade (30),
A drive unit (5 for rotating the cylinder (10) is provided by a detection unit that detects that the tip of the pencil inserted into the cylindrical member (20) has reached a predetermined position. An electric pencil sharpener characterized in that it is configured to stop the operation of.
The detection unit is a contact member (40) with which the core tip of a pencil inserted into the cylindrical member (20) abuts, and the drive unit (5) is driven by a pressing force on the contact member (40). The electric pencil sharpener according to claim 1, characterized in that a drive circuit for operating the motor of (1) is opened.
The contact member (40) is disposed at a predetermined distance from the opening (23) provided at the tip of the reduced diameter portion (21), and the core tip contact portion (41) at the tip is a pencil The electric pencil sharpener according to claim 2, characterized in that when pressed by the tip of the core, it moves along the axial direction of the pencil and presses the contact member (40).
The detection unit includes a moving member (50) including an inclined surface (52) and moving in a direction perpendicular to the pencil insertion direction, and the inclined surface (52) biased toward the moving member (50) A switch member (60) connected to a close switch for opening the drive circuit in a state of being in contact with the
By moving the moving member (50), the contact member (40) is moved in the pencil insertion direction while maintaining the connection with the closing switch, and the portion (41) to which the core tip abuts is displaced. The electric pencil sharpener according to claim 2 or 3, characterized in that it is configured as follows.
A motorized pencil sharpener (1) for scraping a pencil inserted into a tubular member (20) with a cutting blade (30), wherein the core point of the pencil inserted into the tubular member (20) is in a predetermined position Detection unit to detect that the
A contact member (40) to which a lead of a pencil inserted into the cylindrical member (20) is brought into contact;
A moving member (50) having an inclined surface (52) and moving in a direction orthogonal to the pencil insertion direction, and biased toward the moving member (50) and abutted on the inclined surface (52) And including a switch member (60) connected to a drive unit for driving the cutting blade (30) in a state, and a tip adjustment mechanism comprising:
An electric pencil sharpener characterized by stopping operation of said cutting blade (30) by pressing said contact member (40).