JPH0348665Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an optical mouse pad.

(Prior Art) As an optical mouse pad, one having a structure as shown in FIG. 4 is known. That is, the bottom layer consists of an anti-slip sponge 2, on which a hard coat film 6 is formed with an adhesive 4 interposed therebetween. Further, an acrylic plate base material 8 is laminated thereon. Note that a first line pattern 8A is formed on the upper surface side of this acrylic plate base material 8, and a second line pattern 8B is formed on the lower surface side thereof. Furthermore, this first line pattern 8A
is covered with a hard coat film 10, and the surface of the film 10 serves as a mouse running surface 12.

(Problems to be Solved by the Invention) The conventional optical mouse pad described above is prone to scratches because the surface of the hard coat film 10 is rubbed by the felt of the mouse while the mouse is running. Once a scratch occurs, the hard coat film gradually peels off toward the periphery around this scratch, and as a result, the first line pattern 8A is directly rubbed by the slider and the pattern disappears. There is a problem.

Conventional optical mouse pads like this do not have sufficient wear resistance, which is required for mouse pad functionality, especially when the mouse is used vigorously.
There is a problem that it does not have sufficient durability for practical life.

Furthermore, due to its structural characteristics, the conventional optical mouse pad is manufactured using the so-called hard coat method, but this method requires expensive production equipment such as lifting equipment, drying equipment, and clean rooms. Moreover, the production process is complicated and takes a long time, resulting in high production costs.

(Means to solve the problem) To solve the problem of short lifespan, in the manufacturing process, when heating and curing the silane hard coat paint, the base material of the pad is methacrylic resin (acrylic resin), so acrylic resin is used. It is not possible to perform curing treatment at a high temperature above 85-90℃, which is the heat distortion temperature of the resin, and the curing reaction of the silane hard coat paint does not proceed sufficiently, resulting in a low surface hardness of the paint film and a hard coating that is similar to acrylic resin. We focused on the point that this is because the adhesion of the film is also incomplete.

Based on the above considerations, the present invention provides a transparent hard coat layer with abrasion resistance on the line pattern provided on at least one plane of the mouse running side of the pad board, and a protective film on the mouse running side. The problems in the prior art are solved by laminating transparent protective films each formed on the line pattern side.

(Example) An example of the optical mouse pad according to the present invention is shown in the first example.
As shown in the figure.

In the figure, a black neoprene sponge 16 and an acrylic resin adhesive 18 are placed on the desk surface 14.
An anti-slip sponge 20 is provided, and an optical mouse pad 22 is adhesively placed on the anti-slip sponge 20.

In this optical mouse pad 22, a first line pattern 26 is covered with a top protective film 24. Furthermore, this upper surface protective film 24 includes an acrylic resin adhesive material 24A directly covering the first line pattern 26, a transparent polyester film 24B formed thereon, and a transparent polyester film 24B as this protective film.
It consists of a silane-based hard coat layer 24C formed thereon. The surface of the upper protective film 22 is the mouse running surface 28.

The first line pattern 26 is formed on an acrylic board base material 30 which is a padded board, and below this acrylic board base material 30, a second line pattern 3 is formed.
2 is formed. The second line pattern 32 is covered with a black vinyl chloride film 36 via an acrylic resin adhesive 34, and the acrylic resin adhesive 34 and the black vinyl chloride film 36 cover the bottom protective film 3.
8 are made up.

Here, as described above, the lower surface of the lower surface protection film 38 is adhered to the anti-slip sponge 20.

An optical mouse pad having such a configuration is manufactured through the following steps.

First, a predetermined first line pattern 26 and a predetermined second line pattern 32 are formed on the upper surface of an acrylic board base material (methacrylic resin board) with a thickness of 5 mm and a size of 190 mm x 240 mm on the lower surface thereof, respectively, by vacuum evaporation. , made of aluminum thin film.

The details of the shape of these line patterns are based on the contents described in the specification of Japanese Patent Application No. 1983-27713.

After forming the line pattern on both sides in this way, a device called a laminator, the structure of which is partially shown in Fig. 3 with a pair of rubber rollers R1 and R2, has a hard coat layer on the upper side where the mouse runs, and an adhesive material. At the same time, a transparent polyester film 24B coated with is laminated with a black vinyl chloride film 36 with an adhesive material on the bottom side.
The structure shown in FIG. 1 is completed.

At this time, the laminator is set so that the transparent polyester film 24B and the black vinyl chloride film 36 are laminated on the acrylic plate base material 30 with the adhesive side.

This adhesive material is acrylic resin adhesive material 24
A, 34 has a thickness of about 20 to 30 μm. At 20-30 μm, this adhesive is almost optically transparent.

In other words, it is transparent even at 950 nm, which is the output wavelength of the infrared light emitting diode that detects the line pattern of the mouse. By using a material that has this property, no deterioration in line pattern detection ability is observed. Thus, the upper surface protection film 24 as a whole is made to have translucency.

In addition, the adhesive strength of this adhesive is 800g per 25mm width.
As a result, it has sufficient strength for practical use.

In this example, a transparent polyester film (polyethylene terephthalate film) 24B is used as a film to protect the first line pattern on the top surface.
This film has excellent mechanical strength and heat resistance, and has a thickness of about 50 to 100 μm depending on the type and is almost optically transparent.

When the silane-based hard coat layer 24C is provided on the transparent polyester film 24B, since the heat resistance temperature of the polyester film is as high as 150°C, the curing reaction of the hard coat paint is faster than when the hard coat layer is provided on the acrylic resin as in the conventional technology. As this progresses sufficiently, the hardness of the hard coat layer increases and its adhesion to the film also improves.

As a result, the mouse pad according to this example is less likely to be scratched even if the felt that constitutes the slider of the mouse is rubbed while the mouse is running, and even if scratches occur, the hard coat layer does not peel off. Since it does not expand, the lifespan of the mouse pad is long enough for practical use.

Note that since the polyester film itself is soft, it is easily scratched without a hard coat layer.

Therefore, polyester film alone is not suitable as a line pattern protective film for the mouse running surface of a mouse pad. If a film other than polyester film is resistant to scratches even when rubbed by the felt of a mouse and is translucent, that film can be used in place of a polyester film with a hard coat layer. . For example, Teflon (trade name) and polyether sulfon fall under this category.

The thickness of each polyester film structure with a hard coat layer used in this example is as follows: the silane hard coat layer 24C has a thickness of 1.5 μm, the transparent polyester film 24B has a thickness of 50 μm, and the acrylic resin adhesive 24A has a thickness of 1.5 μm. The thickness is 25 μm.

Further, in this embodiment, a black vinyl chloride film 36 with an adhesive material was used as a film for protecting the second line pattern 32 on the lower surface side. The reason for using black is to prevent the light emitted from the light emitting diode from reaching the desk on which the mouse pad is placed and being reflected when detecting the second line pattern 32.

The film used as the lower protective film 38 is not particular about its color or material as long as it does not transmit light, especially light of 950 μm emitted from an infrared light emitting diode. The thickness of the black vinyl chloride film 36 used in this example is 100 μm, and the thickness of the acrylic resin adhesive material 34 is 21 μm.

Note that the black vinyl chloride film 36 is slippery, so if it is placed on a desk as it is, the mouse pad itself will move when the mouse is operated. Therefore, an anti-slip sponge 20 was provided to secure the mouse pad. Specifically, four sponges with a diameter of about 30 mm are placed in each corner.

Next, a description will be given of means for preventing the line pattern from being dazzling due to reflection of indoor light or the like.

In order to prevent glare from the first line pattern 26 on the top surface side, the top protective film 24 itself that protects the first line pattern 26 must have a light transmittance in the visible light region that is low in light transmittance in the infrared light region. It is sufficient to use a film having a characteristic that the ratio is extremely small compared to the ratio. Specifically, a film having a spectral transmittance curve as shown in FIG. 2 can reduce the glare of the line pattern.

That is, the material used has such characteristics that light in the visible light range that is felt by the human eye is difficult to pass through, but light with a wavelength of 950 nm emitted by the mouse's light emitting diode is transmitted. The first film having such characteristics is
When laminated on the line pattern and combined with an acrylic plate base material having similar characteristics, the effect of preventing glare from the line pattern will be even greater.

Note that the film having the spectral transmittance curve shown in FIG. 2 is generally colored in a cyokolate color. However, any color may be used as long as the film has the property of blocking visible light and transmitting infrared light. Further, a pigment or dye for coloring to have the characteristics shown in FIG. 2 may be added to either the transparent polyester film 24B itself, the silane hard coat layer 24C, or the acrylic resin adhesive material 24A.

Further, as a method for preventing glare caused by reflection of room light on the surface of the mouse pad, when a hard coat layer of a film is provided, fine irregularities may be formed on the surface of the hard coat layer. The specific method for forming it is based on the content described in the specification of Japanese Patent Application No. 106115/1982.

As described above, according to the present invention, wear resistance is improved compared to conventional mouse pads, and the life of the mouse pad can be extended. Furthermore, the manufacturing process is simpler than that of conventional mouse pads, and manufacturing costs can be reduced. Furthermore, the line pattern is more effective in preventing glare than conventional mouse pads.

(Function and Effect) Instead of providing a hard coat film directly on the line pattern as in the conventional technology, the present invention
It has a structure in which a protective film with a hard coat layer with excellent adhesion is laminated on a line pattern. As a result, a practically sufficient service life can be obtained even when the mouse is sliding, and since a laminating machine can be used as equipment for producing mouse pads with this structure, production costs can be significantly reduced. be able to.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the optical mouse pad according to the present invention, Fig. 2 is a diagram showing the spectral transmittance curve of the acrylic plate base material in the top protective film, and Fig. 3 is a cross-sectional view of the optical mouse pad according to the present invention. FIG. 4, which is a diagram explaining the manufacturing process, is a sectional view of a conventional mouse pad. 24... Top protective film, 30... Acrylic board base material, 26... First line pattern.

Claims (1)

[Scope of utility model registration request] A transparent hard coat layer with wear resistance is formed on the line pattern provided on at least one plane of the mouse running side of the pad board, and a protective film is formed on the mouse running surface side and the line pattern side. An optical mouse pad characterized by laminating a protective film with optical properties.