JPS607194Y2 - Shape pencil eraser swing prevention device - Google Patents

Description

[Detailed description of the invention] In a knock-type mechanical pencil, an eraser is usually removably attached to the tail end of a core capacity tube that is slidably housed in the barrel, and a lid body that covers the eraser. By fitting the button, it becomes a knock button for feeding out the lead. In other words, this lid is removed and used with an eraser, but since the tip of the lid is inserted inside the barrel, the above-mentioned If the lid is made of thick synthetic resin, a large gap will be created between the inner surface of the barrel and the core volume tube when it is removed.

For this reason, when the eraser is used, the core number tube oscillates, making it impossible to use the eraser efficiently and stably.

The present invention seeks to eliminate the above-mentioned drawbacks with a simple structure.

Figure 1 is a longitudinal sectional view of the embodiment of the present invention, and Figure 2 is A of Figure 1.
In the -A sectional view, a core number tube 2 is slidably housed inside the barrel 1, and a feeding mechanism for the pencil lead 3 is provided at the tip of the core tube 1. Clip 4 is attached.

At the tail end of the core capacity tube 2, a holding fitting 6 for the eraser 5 is removably fitted inside, and a synthetic resin lid 7 is fitted on the outside to cover the eraser 5. .

The lid 7 is used as a knock button, and its tip is inserted into the barrel 1, and a cleaning pin 8 of a pencil lead feeding mechanism is attached to the eraser holding fitting 6.

In such a mechanical pencil, an annular rib 9 is formed on the side surface of the core capacity tube 2 to serve as a stopper for the lid 7, and an annular plate is further fixed to the tail end of the annular rib 9 by press fitting. Shituba 10 is formed.

That is, this collar 10 is formed on the circumferential side of the core-capacity tube 2 so as to face the edge of the lid 7, and has a diameter slightly smaller than the inner diameter of the shaft tube 1.

In the mechanical pencil described above, the lead 3 is fed out each time the lid 7 is pressed.

When using the eraser 5, the lid 7 is removed, the barrel 1 is held in the hand, and the eraser 5 is rubbed against the surface of the paper.

In this case, in the mechanical pencil of the present invention, a collar 10 having a diameter slightly smaller than the inner diameter of the barrel 1 is formed on the circumferential side of the core tube 2, and the collar is positioned as close as possible to the tail end of the barrel 1. Since the core tube 2 is disposed in the center, it is possible to effectively prevent the core number tube 2 from swinging.

Therefore, the eraser can be used stably, and characters written on paper can be efficiently and quickly erased.

In addition, even when the lid 7 is fitted to the core tube 2, since the end of the core tube is held at the center of the shaft tube 1, the edge of the lid is attached to the end of the shaft tube. It can be installed easily without the risk of bumping into objects.

Furthermore, the structure is extremely simple, and manufacturing and assembly can be easily performed.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the embodiment of the present invention, and Figure 2 is A of Figure 1.
-A sectional view. In the figure, 1 is the barrel, 2 is the number of cores, 3 is the pencil lead, 4 is the clip, 5 is the eraser, 6 is the holding bracket, 7 is the lid, 8 is the cleaning pin, 9 is the rib, and 10 is the It's spit.

Claims (1)

[Scope of utility model registration request] A core capacity tube is slidably accommodated in the barrel, a pencil lead feeding mechanism is provided at the tip of the core capacity tube, an eraser is detachably attached to the tail end, and a lid body is provided to cover the eraser. In the mechanical pencil, which is fitted on the outside of the core capacity tube and whose tip is inserted into the barrel to serve as a knock button for feeding out the core, the lid is inserted into the core capacity tube while the lid body is fitted into the core capacity tube. A device for preventing vibration of an eraser in which a collar having a diameter slightly smaller than the inner diameter of the barrel is provided on the circumferential side of the tube facing the edge of the body.