JPS6014637Y2 - Pencil sharpener lead cutting length adjustment device - Google Patents

Description

[Detailed description of the invention] Conventionally, a screw rotation or a two-stage knock mechanism has been used to adjust the cutting length of the lead of a pencil holder.

In the former method, the cutting length can be adjusted steplessly, but the adjustment cannot be performed easily.

Furthermore, the latter requires a large number of parts and is complex in structure, and furthermore, the cutting length can only be converted into two stages.

Therefore, the present invention provides a device which has an extremely simple structure and is easy to operate, and which can change the cutting length in two, three or more steps.

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a front view, FIG. 3 is a sectional view taken along line A-A in FIG. 1, and FIG.
It is a BB sectional view of the figure.

In other words, the base 2 fixed to the housing 1 as shown by the chain line
A rotary table 3 is rotatably supported by the rotary table, and a handle 4 is provided on the rotary table, and a pencil insertion hole 5 is formed on the axis.

A circular cutter 6 is obliquely supported on the rotary table 3, and a pinion gear 7 provided at the end of the cutter 6 is meshed with an internal gear 8 formed on the base 2.

Therefore, when the handle 4 is rotated, the cutter 6 rotates and revolves around the pencil, cutting the tip of the pencil into a conical shape.

In such a pencil side tool, the lead stopper 9 is slidably fitted into a hole provided on the axis of the turntable 3, and a coil spring 10 is stretched between the brim and the turntable, and the cutter The tip of the core stopper 9 is opposed to an auxiliary stopper 11 which is slidably attached to the rotary table 3 so as to face the end of the core stopper 9.

Further, a shaft 12 perpendicular to the axis of the rotary table 3 is provided at the end of the rotary table 3, and the tail end of the core stopper 9 is brought into pressure contact with an adjustment piece 13 rotatably supported by this shaft.

Three protrusions 14, 15, and 16 are provided on the adjusting piece so that the axial position of the press-contacting portion changes in a plurality of steps, for example, in three steps as shown in the figure, as the adjusting piece 13 rotates.

The rotary table 3 is composed of a portion on which the cutter 6 is pivotally supported and a handle 4 screwed thereon, and the shaft 12 is provided in the handle 4 portion.

In the above-described device, the adjusting piece 13 is indicated by the arrow a in FIG.
It can be rotated as shown in b, and when the core stopper 9 is brought into pressure contact with the protrusion 15 at the center as shown by the solid line in the figure, the tip of the protrusion is at the rightmost position in the axial direction. Take.

Therefore, the tip of the lead stopper 9 is located at the rightmost end of the cutter 6, and the pencil lead is cut to be the longest, that is, to be sharp.

Further, when the end of the adjustment piece 13 is pressed and rotated as shown by the arrow a, the tail end of the core stopper 9 comes into pressure contact with the tip of the projection 16 as shown by the chain line.

In this state, the tip of the protrusion 16 is positioned furthest to the left, the cutting length of the pencil lead becomes the shortest, and the tip is cut thicker.

When the adjusting piece 13 is further rotated as shown by the arrow to press the tail end of the core stopper 9 against the tip of the protrusion 14, the tip position of this protrusion will be in the middle of the previous case, and the core will be in the middle position. Be cut.

As described above, the device of the present invention can adjust the cutting length of the core simply by pressing and rotating the adjustment piece 13, so it is extremely easy to operate, and the number of stages of the core stopper press-contact part in the adjustment piece can be reduced. By increasing the number of stages, switching can be performed in multiple stages.

Moreover, the number of required parts is extremely small, the structure is simple, and manufacturing is easy, so that an inexpensive pencil case can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view of the embodiment of the present invention, Figure 2 is its front view,
3 is an enlarged cross-sectional view taken along line A-A in FIG. 1, and FIG. 4 is a cross-sectional view taken along line B-B in FIG. In the figure, 1 is the housing, 2 is the base, 3 is the rotary table, and 4
is the handle, 5 is the pencil insertion hole, 6 is the cutter, 7 and 8 are the gears,
9 is a core stopper, 10 is a spring, 11 is an auxiliary stopper, 1
2 is a shaft, 13 is an adjustment piece, and 14, 15 and 16 are projections.

Claims (1)

[Scope of utility model registration request] A lead stopper is slidably disposed on the axis of a rotary table equipped with a conical cutter that rotates and revolves around the pencil to cut the tip of the pencil into a conical shape, and the stopper and the rotary table are connected to each other. A spring is stretched between them, and an adjustment piece is attached to the end of the rotary table so as to be rotatable about a shaft perpendicular to the axis thereof, and the tail end of the core stopper is brought into pressure contact with the adjustment piece. and a lead cutting length adjusting device for a pencil side tool, wherein the pressure contact portion of the lead stopper in the adjusting piece is formed so that its axial position changes in a plurality of steps as the adjusting piece rotates.