JPH027160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction of a tribostatic antistatic sheet made of a polymeric material.

When a movable sheet (first sheet) made of a polymeric material (e.g. polyester) is inserted into and removed from a slit-shaped air space for the purpose of facing the plane of a certain object in a predetermined manner, the movable sheet In order to make the predetermined part transparent and to protect it from being damaged during insertion/extraction, a guide sheet (second sheet) made of a polymeric material is stretched and fixed facing the object plane, and the slit-shaped It may constitute airspace. In that case, if the guide sheet becomes electrically charged due to the friction of the movable sheet, it is possible to prevent the movable sheet from being inserted into or removed from the slit-shaped air space. or coated with a conductive material.

However, the antistatic paint has a relatively short lifespan because it easily flakes off due to the friction of the movable sheet, and the method of coating the conductive material is a special coating process that is not only very expensive, but also
There is a limit to how much the conductivity of the conductive material can be increased in order to maintain the required transparency, making it difficult to obtain a sufficient antistatic effect.

This purpose is made of a polymeric material, in which a large number of protrusions are integrally distributed on the friction side surface, and
This is achieved by a tribostatic antistatic sheet whose surface is coated with an antistatic layer.

An embodiment of the present invention applied to a multi-item information input device will be described below with reference to the accompanying drawings.

FIG. 1 is an external perspective view of a multi-item information input device equipped with a sheet according to the present invention, and FIG. 2 is a sectional view showing the main structure of the device. Figures 1 and 2
In the figure, a multi-item information input device 1 has a metal base 4 on which a keyboard section 2 and a page switching mechanism 3 are mounted, and a metal base 4 in which a plurality of rectangular through holes 5 arranged in a grid are formed. It has a cover structure with a lid 6 that can be covered, and a page sheet exchange port 7 communicating with the inside of the cover is provided on the front side.
Below each rectangular through hole 5, it is attached to the upper guide plate 20 of the keyboard section 2 via a surface sheet (guide sheet) 8 made of a transparent polymer material and related to one embodiment of the present invention. key top 9
Thin push button switch 1 that switches by vertical movement of
0 is provided, and the push button switch group is a page selection key group A for selecting a desired page sheet.
(14 in the figure) and information input key group B (49 in the figure)
It is divided into.

On the other hand, the page switching mechanism 3 disposed behind the keyboard section 2 includes a winding shaft 12 for winding the page sheet member 11 and a drive shaft connected to a stepping motor (not shown) for driving the winding shaft 12. 13, and the page sheet member 11 on the winding shaft 12
It has rotating shafts 15 to 17 for wrapping an endless belt 14, which is a holding member for holding the winding direction in the winding direction, around the shafts 12 and 13 with a constant tension.
Further, a guide plate 19 is installed on the base below the page sheet guide plate 18 attached to the lower part of the keyboard section 2, and is inclined parallel to the guide plate 18. Guide plates 21 and 22 that form a guide path for the selected page sheet are provided in the space leading to the page. In addition, the space between the guide plates 18 and 19 has the exchange port 7 at the front and the winding shaft 12 at the rear.
2, the page sheet member 11 forms a guide passage 23 leading to the exchange port 7.
It shows a state where it has been introduced into the passage 23.

FIG. 3 is a perspective view showing an example of the page sheet member 11, which includes a base sheet 25 with a metal pin 24 attached to one end, and a plurality of sheets of the same shape made of a flexible polymeric material. One end of each page sheet 26 is fixed to the base sheet 25 at regular intervals, and one side of the base sheet 25 has a row group of page sheet member identification holes 27 that serve as page sheet identification means. ,
Each row group of page sheet identification holes 28 and 29 is provided. When the page sheet member 11 is wound around the winding shaft 12, the other end surface of each page sheet 26 is exposed for a certain length in the winding direction, and a light emitting element (not shown) and a light receiving element (not shown) are exposed. 2) are arranged to face each other with the base sheet 25 in between and detect the respective identification holes 27 to 29.

A multi-item information input device having such a configuration is a second
As shown in the figure, a desired page sheet member 11 is inserted into the passage 23 through the exchange port 7, and the base sheet 25 is inserted into the passage 23.
After the connecting pin 24 is brought into contact with the winding shaft 12, a predetermined push button switch 10 of the page selection key group A corresponding to the selected page sheet 26 is pressed down to switch. Then, the drive shaft 13 rotates by a predetermined angle in the direction of arrow a, thereby causing the belt 14 to rotate in the direction of arrow c.
direction, the winding shaft 12 is rotated by a predetermined angle in the direction of arrow b, and as a result, the page sheet member 11 is wound around the winding shaft 12. The page sheet member 11 wound around the winding shaft 12 is set in such a state that only the other end of the desired page sheet 26 is latched to the upper surface of the tip of the hook-shaped guide plate 21. Next, the drive shaft 13
When the belt rotates by a predetermined angle in the direction opposite to the arrow a, the belt 14, which rotates in the direction opposite to the arrow c direction in conjunction with the rotation, rotates the winding shaft 12 by a predetermined angle in the direction opposite to the direction b. As shown in FIG. 4, the result is that the desired page sheet 26a has the top sheet 8 and the guide plate 20
is inserted into the slit-shaped air space 30 formed by the input key group B, and covers each push button switch 10 of the input key group B, giving a function display to each push button switch 10, and the other page sheet 26b is accommodated in the passage 23 for page selection. The operation is complete.

Next, when another push button switch 10 of the page selection key group A is pressed, the winding shaft 12 rotates in the direction of arrow b, and the page sheet 26 that has been extracted from the air space 30 is rotated.
After a and other page sheets 26b are wound around the winding shaft 12, only the newly selected page sheet 26b is placed in the airspace 3.
It will be inserted within 0.

In this way, the top sheet 8 that is rubbed by the selected page sheet each time the selected page sheet is inserted into and removed from the slit-shaped air space is moved close to the input key group B without damaging the selected page sheet, and is also attached to the selected page sheet. 5 and 5 are enlarged views of a part of the side surface of a transparent polymer material (for example, polyester film) so that the printed functional item target can be visually seen through the through hole 5 of the device lid 6. It is formed as shown in FIG. 6, which is a view from arrow D of FIG.

In FIGS. 5 and 6, the upper surface 31 of the top sheet 8 is formed as a flat surface, whereas a large number of hemispherical protrusions 33 are distributed and formed on the lower surface 32 that is rubbed against the selected page sheet. The page sheet 26 inserted into or removed from the airspace 30 of
a is in point contact with the top of the protrusion 33. Therefore, compared to conventionally used topsheets that have flat top and bottom surfaces, the contact area and frictional force are significantly reduced, reducing the amount of electrification.Furthermore, the topsheet 8 is charged and attracts the selected page sheet 26a. Since the electric lines of force are dispersed radially following the spherical shape of the protrusion 33, their effective adsorption ability is reduced.

At the same time, by applying an antistatic paint to the lower surface 32 of the topsheet to form an antistatic layer in advance, the antistatic effect can be further enhanced. That is, the antistatic layer on the top of the protrusion 33 is worn away in a relatively short time due to the friction of the selected page sheet, but a series of antistatic layers are permanently left in areas other than the top of the protrusion, and the static charge is removed from the remaining layer. Charges begin to dissipate.

Further, although the top sheet 8 shown as an example has hemispherical protrusions 33 on the lower surface 32 and has a flat upper surface 31, the present invention is not limited to the shape of the protrusions, the method of dispersing them, and the state of the upper surface. That is,
For example, the planar shape of the protrusions may be oval, etc., and the protrusions may be distributed in an arrangement other than that shown, such as in a matrix, or each protrusion may be arranged on one side of the flat surface sheet material. It may also be formed by pressing from the surface.

As explained above, the tribostatic antistatic sheet of the present invention significantly reduces the electrostatic adsorption force generated by charging itself, and its practical effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a multi-item information input device equipped with a sheet of the present invention, FIG. 2 is a sectional view showing the main structure of the device, and FIG. 3 is an example of a page sheet member inserted into the device. FIG. 4 is an explanatory diagram showing how the page sheet member is inserted into the device, and FIGS. 5 and 6 are side views showing the top sheet of the device according to an embodiment of the present invention, and FIG. FIG. In the figure, 8 indicates a top sheet (second sheet), 26a indicates a selected page sheet (first sheet), and 33 indicates a protrusion.

Claims (1)

[Claims] 1. A tribostatic antistatic sheet made of a polymer material, characterized in that a large number of protrusions are integrally dispersed and formed on the friction side surface, and an antistatic layer is coated on the surface.