JP2007014550A - Cover consisting of silicone rubber-molded item - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover consisting of a silicone rubber-molded item which can be easily attached and removed. <P>SOLUTION: This cover consisting of a silicone rubber-molded item has a slippery part that is more slippery than the base material of the silicone rubber-molded item. It is useful for a portable device such as a digital camera and the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cover for a mobile device, and relates to a cover made of a silicone rubber molded body for a mobile device such as a digital camera.

Portable devices such as digital cameras are becoming smaller, lighter and thinner, and in order to protect these devices from contact with other members or the impact of dropping, leather, cloth, synthetic resin, rubber Various types of covers such as these are used.
In particular, a cover made of a silicone rubber molded body has low slipperiness and good impact resistance, and when a cover having an internal dimension suitable for the size of a portable device is attached, the operability of the device is also improved. It can be good.
A cover made of a silicone rubber molded body is used as a cover for a portable audio device with a built-in hard disk, and it has also been proposed to use a cover for a mobile phone (for example, Patent Document 1).

  As a cover of a silicone rubber molded body for a portable device, a square cover having an opening at one end called a bag shape or an envelope shape is known, and the size of the opening is the smallest cross section of the device. It is common to have the same size as.

FIG. 2 is a view for explaining an example of a cover of a conventional silicone rubber molded body.
The cover 1 of the silicone rubber molded body has an envelope shape, and stores the device 12 through the opening 11 in the arrow direction. The cover 1 of the silicone rubber molded body is provided with a window portion 14 that matches the display section 13 of the device 12, and for the operation section so that it can be operated in the state of being housed in the cover 1 of the silicone rubber molded body. A thin portion 6 is formed.

  Since the silicone rubber molding has the property of being difficult to slip, when the cover is sized to match the size of the storage device, an opening is provided at one end of the cover However, it has a characteristic that the possibility that the stored device 12 will fall is small. Although this is a characteristic characteristic of the cover of the silicone rubber molded body, it is difficult to slip, so that it takes time to store the device inside the cover. In particular, in the case of taking out compared to the case of storing, there is a problem that it takes more time.

  The cover made of a silicone rubber molded body is provided with a minimum required opening so that it can be operated in a state in which the device is stored, and a thin portion is provided in a portion corresponding to the switch for operating the device. For this reason, there is no hindrance to the operation of the device, but when replacing or removing the battery or memory attached to the device, or charging the built-in battery by attaching it to the cradle, or a signal between external devices such as a personal computer. It was indispensable to remove the cover from the cover.

Although it is possible to increase the inner size of the silicone rubber cover compared to the size of the device and make it easier to attach or remove, the device moves inside the cover when the inner size is larger, Had a problem of falling off the cover. On the other hand, since it is necessary to remove the cover every time the device is attached to the cradle, it is considered inappropriate to use a cover made of a silicone rubber molded body.
Utility Model Registration No. 3040063

  The present invention is a cover made of a silicone rubber molded body to be attached to a portable device, and has an inner dimension equivalent to the outer dimension of the device. It is an object of the present invention to provide a cover made of a silicone rubber molded body that can be easily attached and detached.

An object of the present invention is to form a slippery portion having a slipperiness greater than that of a silicone rubber molded body as a base material in a cover made of a silicone rubber molded body, at least part of a contact portion between a device housed in the cover and the inner surface of the cover. This is a cover made of a molded silicone rubber.
The easy-slip portion is a cover made of the above-described silicone rubber molded body formed of a coating film of a paint having a slipperiness greater than that of the silicone rubber molded body.
The cover is a cover made of the above-described silicone rubber molded body provided with an opening corresponding to each of the protruding part, the light path, or the image display part when performing the function of the equipment to be stored. is there.
The image display part is a cover made of the above-described silicone rubber molded body having an opening having the largest area.
It is a cover made of the above-mentioned silicone rubber molded body, which is a cover for a digital camera.

  In the present invention, since the easy-sliding portion is formed on the inner surface of the cover made of a silicone rubber molded body by a coating film or the like, it is possible to provide a cover that can be easily housed and taken out from the cover made of the silicone rubber molded body. it can.

The present invention provides a cover made of a silicone rubber molded body for a portable device such as a digital camera, which can be easily mounted and removed, and can be easily operated in a state in which the cover is mounted and has a good holding property. Is.
The cover made of the silicone rubber molded body of the present invention is characterized in that a coating having a smaller friction coefficient than the base surface of the silicone rubber molded body is formed on at least a part of the inner surface.

  In the present invention, when the cover having an opening is colored by surface coating in order to enhance the designability, the sprayed paint enters the inside of the cover made of the silicone rubber molded body from the opening and is partially on the inner surface. It has been found that in the case where a film is formed, the portable device can be smoothly stored and taken out.

  The reason for the smooth storage and removal of the mobile device inside the cover of the silicone rubber molded body by the coating film attached to the inner surface of the cover of the silicone rubber molded body is due to the physical properties of the surface of the coated film. In particular, since a portion having a small friction coefficient is generated on the inner surface of the cover of the silicone rubber molded body, it is considered that the portable device can be smoothly stored and taken out.

The present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view for explaining a cover of a silicone rubber molded body according to the present invention, and FIG. 1 (A) is a perspective view as seen from the front lens side of the cover for a digital camera, and FIG. These are the perspective views seen from the display part side of the surface opposite to the lens side.
The cover 1 of the silicone rubber molded body is integrally molded and has a photographing lens opening 2, a finder lens opening 3, and a strobe opening 4 for a digital camera.

  Also, a shutter button portion 5 is provided at the upper portion, and the shutter button portion 5 is formed with a thin portion 6 so as to enable a half-pressed state of the focus or the shutter button that holds the setting state of the exposure adjusting means. The display portion opening 7 is provided on the back surface.

FIG. 1B is a perspective view seen from the display unit side on the back.
The cover 1 of the silicone rubber molded body is provided with a display portion opening 7 and a viewfinder opening 8 that match the size of the liquid crystal display device on the back surface. Various operation button portions 9 used for the above are provided, and a thin portion is formed in any of the operation button portions, thereby enabling smooth button operation.
In the cover 1 of the silicone rubber molded body, an easy-sliding portion 10 having a smaller friction coefficient than that of the base silicone rubber molded body is formed by a coating formed by sprayed paint for coloring the outer surface. Therefore, the digital camera can be easily stored and taken out.

  Further, since the cover 1 of the silicone rubber molded body shown in this example has an easily sliding portion formed on the inner surface, the digital camera can be easily housed and taken out, and the display portion opening 7 and the photographing lens can be used. It has an opening having a large area in the order of the opening 2 and does not have a dedicated opening for storing and taking out.

In the present invention, the digital camera can be stored and taken out by pushing the opening 7 for the display portion, which is the opening having the largest area, by utilizing the elongation of the silicone rubber molded body. It is possible to provide a cover having a large protection effect of a digital camera which has no opening and has a minimum necessary opening.
Such an effect is realized by the fact that the cover of the silicone rubber molded body of the present invention has an easy-sliding portion on the inner surface, so that it can be smoothly mounted and taken out.

An example of a method for producing the cover of the silicone rubber molded body of the present invention will be described.
After mixing and kneading ingredients such as raw rubber, pigment, and curing agent of silicone rubber, it is injected into a mold consisting of an internal mold and an external mold, held at a predetermined temperature, and then molded by removing from the mold Can do.

Next, the interior and surface of the molded silicone rubber molded body are cleaned and dried, and then the undercoat paint is sprayed. Further, after the undercoat paint is sprayed, the surface design is sprayed. A cover of a silicone rubber molded body with improved properties can be produced.
When the paint is sprayed, it adheres from the opening to the inner surface without performing a special coating method. However, when the amount of coating on the inner surface is increased, positive injection may be performed from the opening.

The slipping property of the device can be adjusted by adjusting the coating amount and the coating area of the coating on the inner surface according to the surface characteristics of the device to be stored, the properties of the coating, and the like.
After coating with a paint, a coating film having excellent weather resistance, corrosion resistance, and the like can be obtained by performing a heat treatment and baking the paint.
Moreover, the formation of the coating film by the paint is not limited to the method by spraying the paint, and may be performed by a method of immersing in the paint.

  The paint applied to the silicone rubber molded body of the present invention is preferably a silicone polyester resin paint, and the silicone polyester resin paint has a good compatibility with the silicone rubber molded body of the base material and has excellent characteristics. Can be formed.

The following examples illustrate the invention.
A silicone rubber molded body having a width of 92 mm, a height of 57 mm, and a depth of 21 mm, a thickness of 1.6 mm, a diameter of the photographing lens opening of 41 mm, a display opening of 35 mm in length and a width of 46 mm. It was produced by injection molding using an inner mold and an outer mold.
Next, the surface of the silicone rubber molding was cleaned and cleaned, and after drying, the silicone polyester resin paint was undercoated and overcoated by spraying, and baked.
In any sample, a coating film was formed on almost the entire inner surface by the paint reaching the inside from the opening.
A plurality of silicone rubber moldings are colored by application of paints having different characteristics, and a measurement sample having a size of 15 mm × 30 mm is cut out, and a similar measurement sample is cut out from a sample in which no coating film is formed by the paint. The coefficient of friction was measured.

  The friction coefficient is measured by a surface texture measuring machine (Shinto Kagaku Haydon-14DR type) according to “Friction Coefficient Test Method for Plastic Films and Sheets” defined in JIS K7125-1987. The dynamic friction coefficient was measured under the conditions of speed: 100 mm / min, counter friction surface: aluminum, temperature: 25 ° C., humidity: 55% RH, and the results are shown below.

Sample number Paint color Friction coefficient (outer surface) Friction coefficient (inner surface)
1 Black 0.25 0.38
2 Orange 0.28 0.59
3 Black 0.30 0.47
4 Orange 0.33 0.28
5 Translucent white 0.25 0.40
6 Unpainted product 0.63 1.30
7 Unpainted product 0.65 1.28

  Since the cover of the silicone rubber molded body of the present invention has an easy-slip portion formed on the inner surface, it is possible to provide a cover that can be easily housed and taken out of the silicone rubber molded body. If the necessary opening for the image display unit is provided, it is possible to store and take out the device by expanding the opening with a large area such as the image display unit. There is no need to provide a dedicated opening, and it is possible to provide a cover made of a silicone rubber molded body having a large protective effect such as impact resistance.

FIG. 1 is a diagram for explaining a cover made of a silicone rubber molded body according to the present invention. FIG. 2 is a view for explaining an example of a cover made of a conventional silicone rubber molded body.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Silicone rubber molding cover, 2 ... Shooting lens opening part, 3 ... Finder lens opening part, 4 ... Strobe opening part, 5 ... Shutter button part, 6 ... Thin part, 7 ... Display part opening part, DESCRIPTION OF SYMBOLS 8 ... Finder opening part, 9 ... Operation button part, 10 ... Easily sliding part, 11 ... Opening part, 12 ... Apparatus, 13 ... Display window, 14 ... Window part

Claims (2)

In a cover made of a silicone rubber molded body, at least a part of the contact portion between the device housed in the cover and the inner surface of the cover is formed with an easy-sliding portion having a slipperiness greater than that of the silicone rubber molded body of the base material. A cover made of a molded silicone rubber. 2. The silicone rubber molding according to claim 1, wherein the easy-sliding portion is formed of a coating film of a paint having a slipperiness greater than that of the silicone rubber molding.

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