JPS646320Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for adjusting the tip of an electric pencil sharpener. Conventionally, the mechanism was such that the operating rod installed at the bottom of the blade holder pressed the movable contact piece, and it was not possible to prevent fine powder from the shaving core from entering the switch body, and the lever for adjusting the tip of the core was not adjustable. Although it was equipped with many functions, there was a problem in terms of cost. In view of the above-mentioned drawbacks, the present invention prevents the entry of fine powder by storing the switch body, which consists of a fixed contact piece and a movable contact piece, in a chamber separated from the cutting part, and also enables tip adjustment with a single screw. The purpose is to Below, the main proposal will be explained with a diagram of an example.
Reference numeral 1 denotes an electric pencil sharpener main body, a shavings receiver 2 is slidably positioned from the front of the main body 1 , and the main body 1 has a hole 3 for inserting a pencil and a display window 5 for a cutting completion indicator lamp 4. The lid body 6 is locked. The main body 1
A blade holder 7, an electric motor 8 for driving the blade holder 7, a charging transformer 9, and a charging plug 10 are built inside. Further, at the bottom of the main body 1 ,
A chamber 11 isolated from the blade holder 7 is provided, and a switch body 12 whose one end is pivotally supported so as to be freely rotatable is disposed in the chamber 11. , the switch body 12
rotates and moves up and down. The switch body 12
There is a fixed contact piece 14 and a movable contact piece 15 having spring properties.
The cutting completion indicator lamp 4 blinks when the fixed contact piece 14 and the movable contact piece 15 come into contact with each other due to the rotation of the switch body 12. A tip adjustment member 17 consisting of a screw as a protrusion is screwed into the bottom cover 16 of the main body 1 so as to be able to come out and go freely, and by changing the distance between the movable contact piece 15 and the fixed contact piece 14, an indication of completion of cutting is made. It controls the timing. Next, to explain the operation of the present invention, first, the lid body 6 is slid to one side, and the hole 3 and the blade holder 7 and the display window 5 and the display lamp 4 are aligned with each other, and the cutting of the pencil inserted through the hole 3 is completed. Immediately before this, the actuating rod 13 is pressed against the tip of the pencil lead, and the actuating rod 13 rotates the switch body 12, causing the tip adjusting member 17 to move the movable contact piece 15 to the fixed contact piece 14.
to make the cutting completion indicator lamp 4 blink. As described above, the present invention prevents carbon fine powder from entering the switch and improves the durability of the switch by simply storing the switch body, which has a fixed contact piece and a movable contact piece, in a chamber isolated from the cutting blade. Moreover, since the tip of the core can be adjusted using only screws, it can be expected that production costs will be reduced. In addition, the tip of the core can be easily carved by simply adjusting the amount of protrusion of the protrusion from the bottom of the chamber.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an electric pencil sharpener according to an embodiment of the present invention, Fig. 2 is a circuit diagram of the electric pencil sharpener, Fig. 3a is a vertical cross-sectional view of the electric pencil sharpener, and Fig. 3b is
is a longitudinal sectional view of the main part when the present invention is in operation. 1 ...Body, 2...Shavings receiver, 7...Blade holder, 8...Electric motor, 9...Transformer, 10...
Charging plug, 3... Pencil insertion hole, 11...
Chamber, 14... Fixed contact piece, 15... Movable contact piece, 12
...Switch body, 13... Operating rod, 17... Protrusion.

Claims (1)

[Scope of utility model registration request] A shavings tray is removably attached to the main body case,
An electric pencil comprising a rotatable blade holder with a cutting blade attached inside the main case, housing an electric motor for driving the blade holder and its power source, and a through hole for inserting a pencil in the upper part of the main case. In shaving, a chamber isolated from the cutting blade is provided at the bottom of the main body case, a switch body having a fixed contact piece and a movable contact piece is attached to the chamber so as to be movable up and down, and an operating switch body provided at the bottom of the blade holder is provided. The switch body is pressed and driven by the pressure of the tip of a pencil lead through a rod, and the movable contact piece and the fixed contact piece of the switch body are brought into contact with each other by a projection screwed into the bottom of the chamber so as to be freely retractable. An electric pencil sharpener characterized in that the distance between the movable contact piece and the fixed contact piece is adjusted by the amount of protrusion of the protrusion from the bottom of the chamber.