JPH01317794A - Pencil sharpener - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a pencil sharpener.

Conventional technology First, an example of a conventional electric pencil sharpener will be explained.

In FIG. 6, ζ1 is a motor, 2 is a reduction gear, 3 is a rotating shaft for rotating the cutter, and 4 is a gear fixed to the rear end of the rotating shaft 3 and meshed with the reduction gear 2. 5 is a cutter having a windmill shape as shown in FIG. 7, and is fixed to the rotating shaft 3 at the center. 6 is a pencil accommodating portion that becomes narrower toward the tip. An open lower part of the pencil accommodating part 6 facing the cutter 5 is formed so that a part of the pencil inserted into the pencil accommodating part 6 protrudes from the open lower part. and,
The cutter 5 rotates close to the opening lower part, and is configured to hit the part of the pencil protruding from the opening lower part and cut that part. Reference numeral 8 denotes a pencil feeding device which is rotatably held at the upper part of the pencil accommodating part 6 and feeds the pencil inserted into the pencil accommodating part 6 while rotating. Reference numeral 9 designates a transparent cover that covers a part of the cutter that the cutter 5 rotates, and reference numeral 10 designates a box that is a chip receptacle that is removably provided below the part of the cutter.

The pencil sharpener with one type of windmill cutter shown above is designed so that the pencil is cut at the front upper part, and in order to clean a part of the cutter, the cover 9 that covers that part can be removed. Very convenient. In this case, it is dangerous if the motor rotates with the cover 9 removed, so it is desirable to provide a safety device to prevent the motor from rotating with the cover 9 removed.

Incidentally, in the above example, the chip receiver is provided with a safety device that prevents the motor from rotating when the box is removed. In FIG. 8, 11 is a switch device, and a button 12 of the switch device 11 has a protrusion 1 on a box 10.
3, and when the box 10 is fitted into the predetermined position, the button 12 is pressed and the contact 1
4 and the contact 15 come into contact with each other, and the motor 1 is enabled to operate.

However, as shown in FIG.
is separated and motor l does not operate.

Problems to be Solved by the Invention However, in the above-mentioned pencil sharpener with a one-piece windmill cutter, the cover that covers part of the cutter and the chip receptacle have a safety device that prevents the motor from starting even if either of the boxes comes off. In order to configure this, it was necessary to provide separate switch devices for both the cover and the chip catcher.

The present invention has been made in view of the above problems, and provides a pencil sharpener in which a cover covering a part of the cutter or a chip receptacle can be configured with a single switch device as a safety device in case the box is removed. The purpose is to provide.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems.The chip receptacle is installed in the box and the cover only when the box and the cover that covers a part of the cutter are both fitted in a predetermined position. A movable member is provided that is pushed by both sides to bring the two contact pieces into contact.

Operation With the above structure, if the chip receiver is removed from a predetermined position on either the box or the cover, the two contact pieces will separate.

EXAMPLE Hereinafter, an example of a pencil sharpener according to the present invention will be described. In this embodiment, the configuration of the main parts for cutting a pencil, that is, a motor 1, a reduction gear 2, a rotating shaft 3, a gear 4, a cutter 5, a pencil accommodating section 6, and a pencil feeding device 8 is shown in FIG. Since this is the same as the conventional example, the explanation will be omitted.

In FIG. 1, 20 is a cover that covers a part of the cutter; 21
The chip catcher is a box, and each is removably attached to the front part as in the conventional case. 23 is a main body case. 24 is a movable member provided on the back side of the main body case 23, and is slidably held by a boss 25 that projects from the main body case 23. As shown in FIG. 2, 26 and 27 are electrode plates fixed at their bases, 26a is a contact at the tip of the electrode plate 26, and 27a is a contact at the tip of the electrode plate 27. When no external force is applied, the contacts 26a and 27a are separated, but the movable member 2
4 approaches, the electrode plate 26 is pushed by the movable member 24 and bends, and the contacts 26a and 27a come into contact. 28 and 29 are sliding members held in the main body case 23, and the tip of the sliding member 28 is connected to the protrusion 3 of the box 21 to catch chips.
0, and the tips of the slide members 29 are adapted to abut against the protrusions 31 of the cover 20, respectively. Further, the rear end surfaces of the slide members 28 and 29 are in contact with both ends of the movable member 24, respectively, and the chip receiver is in a state where both the box 21 and the cover 20 are fitted in a predetermined position as shown in FIG. The chip receiver box 216 and the cover 20 support both ends of the movable member 24 via slide members 28 and 29, respectively, and maintain contact between the contacts 26a and 27a.

The operation will be explained below. For example, as shown in FIG. 3, when the box 10 of the chip receiver is removed from a predetermined position, the support at one end of the movable member 24 is lost, the movable member 24 is tilted, and the contacts 26a and 27a are separated. On the other hand, when the cover 20 is removed from the predetermined position as shown in FIG. Therefore, when at least one of the box 21 and the cover 20 is removed from the predetermined position, the chip receiver will close the contacts 26a and 27.
a is separated and motor 1 does not operate.

FIG. 5 shows a second embodiment of the invention. Fifth
In the figure, 32 is a movable member provided on the back side of the main body case 23, and is slidably held by a boss 25 protruding from the main body case 23, similar to the movable member 24 in the previous embodiment.

However, in this embodiment, instead of the slide members 28 and 29 provided in the previous embodiment, bosses 33 and 34 are provided at both ends of the movable member 32, and the bosses 33 and 34 directly connect to the chip receiving box. 21 and the protrusion 31 of the cover 20.

Effects of the Invention As described above, the chip receiver of the present invention has a movable member that brings the two contact pieces into contact only when the box and the cover that covers part of the cutter are both fitted into the predetermined positions. The cover covering part of the cutter and the chip catcher can constitute a safety device that renders the motor inoperable if the box is removed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of a pencil sharpener according to the first embodiment of the present invention, and the second rj! J is a vertical partial cross-sectional view of only the switch device shown in Figure 1, Figure 3 is a cross-sectional view of the main part of the pencil sharpener with the box removed, and Figure 4 is the same. A cross-sectional view of the main parts of a pencil sharpener with the cover covering the cutter part removed, FIG. 5 is a cross-sectional view of the main parts of a pencil sharpener according to a second embodiment of the present invention, and FIG. 6 is a conventional pencil sharpener. 7 is a front view of the same pencil sharpener, and FIGS. 8 and 9 are main part sectional views showing the configuration of a safety device of a conventional pencil sharpener. 1...Motor 2...Deceleration gear 3
... Rotating shaft 5 ... Cutter 6 ...
...Pencil storage section 20...Cover 21...
・The chip catcher is box 23...Main body case 24...Movable member 2
5...Boss 26.27...Electrode plate 28
．． 29... Slide member 30. 31... Protrusion Name of agent Patent attorney Toshio Nakao and one other person Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] a cutter driven by a motor; a removable cover covering the cutter; and a removable chip receiving box;
two contact pieces that are always biased in a direction apart and that enable the motor to operate by contacting each other; A pencil sharpener characterized in that a movable member is provided that brings the two contact pieces into contact only when the covers are both attached to predetermined positions.