JP2003251996A - Manual pencil sharpener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual pencil sharpener with such handling advantages that a troublesome operation to rotate a pencil in the same direction as many times as considered necessary while the pencil is passed to one hand to the other, is unnecessary and instead, the pencil is rotated alternately in the reverse direction without passing the pencil from one hand to the other. <P>SOLUTION: This manual pencil sharpener is equipped with a blade fitted to the inner face part of a pencil sharpening hole 2 and operated in such a way that one end of the pencil is inserted into the hole and rotated in one direction to taper the barrel and lead of the pencil. In this pencil sharpener, the pencil sharpening hole 2 is provided and a rotator 1 with an exposed blade 3 fitted to the inner face part of the hole 2, is installed inside a case 4 in such a way that the rotator 1 is prevented from rotating in a direction where the pencil is rotated, when it is sharpened and the rotator 1 rotates freely in the reverse direction. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual pencil sharpener. 2. Description of the Related Art A conventional manual pencil sharpener has a conical pencil sharpening hole into which one end of a pencil can be inserted, and is attached to an inner surface of the hole so as to expose a blade. It has become. [0003] In a conventional manual pencil sharpener, one end of the pencil is inserted into the pencil sharpening hole, and the pencil is rotated to one side many times to make the axis and the core of the pencil taper. Although it was designed to be sharpened, the trouble was that the user had to change the pencil many times to rotate the pencil many times in the same direction. Therefore, the present invention eliminates the troublesome operation of holding the pencil and rotating it in the same direction many times, and alternately rotates the pencil in the opposite direction without holding the pencil. An object of the present invention is to provide a user-friendly manual pencil sharpener which can sharpen a pencil by being made to work. In order to solve the above problems, a manual pencil sharpener according to the present invention has a blade attached to the inner surface of a pencil sharpening hole, and one end of a pencil is inserted into the hole. In a manual pencil sharpener capable of shaving the axis and the core of the pencil into a tapered shape by rotating the pencil shaft to one side, a pencil sharpening hole 2 is provided and a rotation attached to expose a blade 3 on the inner surface thereof. The configuration is such that the child 1 is installed in the case 4 so that it cannot rotate in the direction in which the pencil is rotated and can rotate in the opposite direction when the pencil is sharpened inside the case 4. An embodiment of the present invention will be described below with reference to the drawings. The drawings show one embodiment of the present invention, and the present invention is not limited to this embodiment. First, in the manual pencil sharpener of the present invention, the rotor 1 as shown in FIG. The rotator 1 has a pencil-shaped sharpening hole 2 into which one end of a pencil is inserted, and a blade 3 is formed on the inner surface of the sharpened hole 2.
It is attached to expose. The rotator 1 is assembled to the case 4 so that it cannot rotate in the direction in which the pencil is rotated when sharpening the pencil (hereinafter referred to as the forward direction) and can rotate in the reverse direction. That is, the rotor 1 has a rotating shaft portion 5, the rotating shaft portion 5 is rotatably supported by a bearing 6 provided inside the case 4, and the rotor 1 is rotated by a reverse rotation preventing mechanism. You are restricted to only one direction. Note that the bearing 6 can be provided on a support 9 that fits inside the case 4. The mechanism for preventing reverse rotation of the rotor 1 is free. For example, a mechanism using a ratchet wheel as in the illustrated embodiment can be employed. That is, the rotor 1
When the toothed wheel 7 is attached to the inside of the case 4 and tries to rotate in the forward direction, the toothed teeth of the toothed wheel 7 are engaged.
However, when the ratchet 7 rotates in the opposite direction, the claws 8 can be installed inside the case 4 to avoid elastic deformation and engagement with the teeth of the ratchet 7. In addition,
The claw 8 can be provided integrally with the support 9 on which the bearing 6 is provided. An opening 10 communicating with the pencil shaving hole 2 is provided in the case 4 at a position in front of the pencil shaving hole 2 in the rotor 1. That is, one end of the pencil can be inserted into the pencil shaving hole 2 from the opening 10. The case 4 can be divided, as in the illustrated embodiment, and the case rear portion 4a can be separated from the case front portion 4b so that the shavings accumulated in the case rear portion 4a can be discharged. . When one end of the pencil is inserted into the pencil shaving hole 2 of the rotator 1 from the opening 10 of the case 4 and the pencil is rotated in the forward direction, the rotation of the rotator 1 is stopped. Then, the pencil can be sharpened by the blade 3. Then, stop once with the pencil rotated as much as the hand is twisted, and then twist the hand in the opposite direction to rotate the pencil in the opposite direction and return it to its original position. It is not possible). At this time, rotor 1
Also rotate in the opposite direction with the pencil. That is, the pencil is prevented from idling in the pencil shaving hole 2. For this purpose, it is necessary to fix the pencil to the rotor 1. As a fixing means, for example, as shown in the illustrated embodiment, the pencil is elastically deformed radially around the entrance of the pencil shaving hole 2 in the rotor 1. A plurality of arc-shaped curved spring pieces 11, 12 and 13 which can contact the outer peripheral surface of the pencil inserted into the pencil shaving hole 2 with appropriate friction and can clamp the pencil are provided integrally with the rotor 1. Can be. When the pencil is rotated in the reverse direction and returned to the original position as described above, the pencil can be rotated again in the forward direction to continue to sharpen the pencil. Thereafter, the axis and the core of the pencil can be tapered by repeatedly and repeatedly rotating the pencil alternately in the reverse direction and the forward direction. And there is no need to change the pencil during this pencil sharpening operation. The manual pencil sharpener of the present invention is as described above. By repeatedly and repeatedly rotating the pencil in the forward and reverse directions, the pencil shaft and the core can be easily shaved. Since it can be used, there is no need to change the pencil many times when rotating and sharpening the pencil like a conventional manual pencil sharpener, and the usability is very good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view. FIG. 2 is a cross-sectional view taken along line XY of FIG. FIG. 3 is a longitudinal sectional view at a position orthogonal to the longitudinal sectional view of FIG. 1; FIG. 4 is a perspective view of a rotor. [Description of Signs] 1 Rotor 2 Pencil shaving hole 3 Blade 4 Case 5 Rotating shaft 6 Bearing 7 Claw wheel 8 Claw 9 Support body 10 Opening 11 Spring piece 12 Spring piece 13 Spring piece

Claims (1)

Claims: 1. Attach a blade to the inner surface of a pencil sharpening hole,
In a manual pencil sharpener in which one end of a pencil is inserted into the hole and rotated to one side, a pencil shaft and a core can be sharpened in a tapered shape. A manual pencil sharpener characterized in that a rotor 1 mounted so as to expose 3 is installed in the case 4 so that it cannot rotate in the direction in which the pencil is rotated and can rotate in the opposite direction when the pencil is sharpened. vessel.