JPH02228691A - Light-transmissive display body made of synthetic resin - Google Patents

Abstract

PURPOSE:To display the whole of a mark without breaking a light-transmissive part by connecting a light opaque part to another across a projecting piece projected at the rear of a display line through the through holes provided in a light-transmissive resin layer on both sides of the display line by a narrow connection stripe made of an opaque resin. CONSTITUTION:The opaque resin forming light opaque parts 31, which are surrounded with display lines 21 and 21' of light-transmissive display parts 2A to 2C, at the rear of display lines 21 and 21', namely, on the light source side is connected by narrow connection stripes 33 which bridge projecting pieces 22 projected to the rear of display lines 21 and 21' along the outside peripheral surfaces of these projecting pieces 22. Consequently, display lines 21 and 21' are formed without breaks, and light is transmitted from lighting parts 23 at the time of lighting and is not affected by connection stripes 33 made of the opaque resin at all because these lighting parts 23 are formed on both sides of projecting pieces 22 of display lines 21 and 21'. Thus, a mark is displayed on a display face without breaks.

Description

[Detailed Description of the Invention] Industrial Application Field: The present invention relates to the improvement of a synthetic resin display body, and uses laminated multicolor injection molding without printing, so that a desired display area can be clearly identified by a light source from behind. Regarding the display body.

Conventional technology: For example, in the operation panels of electrical equipment and automobiles, a display structure is often adopted in which an indicator light is turned on when operating on the operation switch or display section so that the operating status can be easily confirmed visually. It's coming.

Currently, display boards that are illuminated from behind have an outer shape made of highly translucent (for example, translucent) synthetic resin, and a surface that is colored black, for example. The display surface is painted with a dark-colored paint, and the necessary marks are laser-processed onto the display surface to print in a translucent light color (for example, white).

This allows the printed area to transmit light when illuminated from behind, thus achieving the desired goal.

In addition to the above method, two-color molding (- a translucent part is molded in the next molding process, and an opaque part is molded outside of the primary molding in the next secondary molding process). ), a molded product is obtained in which the transparent portion is exposed in the form of a desired mark.

Problem to be Solved: However, in the case of the display body using the conventional method as described above, a large number of steps are required and the production cost increases. In addition, in the latter case, for example, in the case of letters, the part surrounded inside from the part for forming characters such as numbers "0" and "8" becomes independent, so during secondary molding It was not possible to feed the resin into that independent part, so a part of the part 5 forming the letters was cut off, as shown in FIG. 4, and the cut part 6
There is no choice but to adopt a method in which the resin flows to the independent portion 7.

Even if such a method is adopted, the width of the flow path (cut portion) 6 is usually required to be at least 0.4 m/m, and if the display mark becomes small for this reason, the overall balance of the mark will be lost and it will look unnatural. It is inevitable that it will become something. Therefore, if there are many independent parts such as fine marks, problems will occur for the reasons mentioned above.

Means for Solving the Problems: The present invention solves the problems caused by the conventional means as described above, and uses multicolor molding that is integrally laminated, so that even if there is an independent part in the mark display part, the - To provide a translucent display body having a structure in which a mark can be displayed in its entirety without cutting off a portion, that is, without cutting a translucent part.

That is, the present invention provides a translucent display body in which an opaque resin is integrally laminated on the front side of a translucent resin, and a display portion is formed through the translucent resin. The inner opaque area surrounded by the display line is connected to the other opaque area through a thin communication line between the opaque resin and the other opaque area through holes drilled in the translucent resin layer at appropriate locations on both sides of the display line. A protruding piece is connected behind the display line by straddling the protruding piece, and both sides of the protruding piece serve as a lighting section where the communicating strip is provided.

If a mark is formed using the translucent resin of the present invention containing a fluorescent dye or fluorescent pigment, a display material that can display clear translucent images even with deep or detailed designs when lit. Can be done.

Function: In the display body of the present invention, when forming the translucent display part by multicolor molding of a translucent resin and an opaque resin,
For a non-transparent part surrounded by the display line of the transparent display part, behind the display line (on the light source side), a protrusion piece that is provided with an opaque resin forming the non-transparent part protruding behind the display line. By making the display line communicate by a thin communication strip that spans the outer periphery of the display line, it is possible to form the display line without cutting it out.Furthermore, the display line has lighting sections on both sides of the protruding piece, so it does not emit light when turned on. is transmitted through this part,
It is completely unaffected by the continuous line created by opaque resin.
displayed clearly. Of course, marks can be displayed on the display surface without chipping, and even fine designs can be displayed beautifully without any problems, and a display body with a desired mark can be easily obtained by only molding.

Examples: Examples of the present invention will be described below with reference to the drawings.

FIG. 1 partially shows an example of a transparent display t*1 according to the present invention. In FIG. 1, 2A, 2B, and 2C are transparent display portions represented by letters. (Hereinafter, this one letter will be used as a representative) is a transparent resin (for example, a milky white resin), and the other non-transparent parts 3 are molded from an opaque resin (for example, a black resin). ing. This molding is obtained by injection molding using a known two-color molding machine.

As is known, when injection molding is performed using two different colored resins, the lower layer 20 of the display body 1 is primarily molded with a translucent resin, and the upper layer 30 is formed with an opaque resin. It is covered and molded. Therefore, the two translucent display parts are molded into the desired convex shape during primary molding, and the non-transparent part three
The parts other than the convex translucent display part 2A etc. are finished by being cast with an opaque resin.

The characters "
Display lines 21 that form characters, such as "A" and "B"
．． Since opaque resin is not injected into the non-transparent part 31 surrounded by 21'' during secondary molding, the part (non-transparent part 31
), as shown in FIGS. 2 and 3, extremely small-diameter through holes 25 are provided on both sides of the display hole 21' (or 21 may be used) of the translucent display section 2A at appropriate locations. and while the through holes 25, 25 are bored, the protruding piece 22 is provided protruding toward the back side (which will be the light source side when it becomes a product), and the protruding piece 22 is placed along the outer circumferential surface 22' of the protruding piece 22. The resin during secondary molding flows and connects the two-way holes 2525, forming the display line 21.
The opaque portion 31 surrounded by the lines 21 is formed throughout.

A flowing portion of the resin during this secondary molding is provided as a communicating strip 33 of opaque resin along the outer circumferential surface 22' of the protruding piece 22. In addition, a protruding piece 22 made of translucent resin
Both sides are open to form a lighting section 23.

Note that the operation of injecting the opaque resin into the inner opaque portion 31 surrounded by the display lines 21 and 21' is performed using an operation bottle in the mold so that an injection path corresponding to the communication strip 33 is formed. After primary molding, the transparent display section 2A as described above is obtained by retreating and performing secondary molding.

According to the display body 1 configured in this way, if it is used with the lower layer portion 20 side made of transparent resin facing the light source side,
Generally speaking, light is clearly displayed on the two light-transmitting display sections formed on the surface of the non-light-transmitting section 3 by passing through the inside of the display line 21' penetrating from the lower layer section 20 to the upper surface. At this time, a communication line 33 made of opaque resin that straddles the display line 21
is narrow and is provided along the outer peripheral surface of the protruding piece 22, and both sides of the protruding piece 22, which is provided integrally with the display line 21'' by the resin of the lower layer part 20, are exposed to the light source. Since it is a lighting section 23, the light passes through the lower layer section 20 from the lighting section 23 and passes through the display line 21', and the light is no longer blocked by the continuous strip 33 of opaque resin, and the light is transmitted through the display line 21'. The display section 2A will be clearly displayed.

Regarding the light-transmitting display portion of the present invention, as long as the material has light-transmitting properties in terms of color tone, display in colors other than white can be achieved by molding it with a resin mixed with a desired dye or pigment. In addition, if you use a translucent resin mixed with fluorescent dye or fluorescent pigment, it will emit fluorescence by transmitting the light when it is turned on, so even translucent display marks that form fine display lines will be clearly visible. As mentioned above, the continuous stripes made of opaque resin are not a problem at all.

Moreover, since the display body of the present invention is obtained by molding with a multicolor molding machine, the overall shape of the display body may be
Any shape can be adopted, from a flat plate to a button, or any other three-dimensional shape as long as it can be molded.

Effects of the Invention: As described above, in the display body of the present invention, the non-transparent part and the transparent display part can be formed to have a γ The continuous strip acid part that can be formed simultaneously and injects the opaque resin is configured to straddle the display line of the translucent display part along the protruding piece provided on the light source side. By providing a lighting section on one side, the entire display can be displayed clearly without interfering with light transmission, and the display surface can be beautifully finished by molding, and all products can be manufactured at once by molding, so production costs can be significantly reduced. It can be said that it is a useful product that can be reduced and provided at low cost.

[Brief explanation of the drawing]

The drawings show a specific example of the display body of the present invention. FIG. 1 is a partially cutaway external perspective view, FIG. 2 is an enlarged cross-sectional view of FIG. (2) Viewed sectional view FIG. 4 is an enlarged view showing an example of a display body formed by conventional molding. 1... Transparent display body 2A, 2B, 2C... Transparent display section 3 expressed in characters
... Opaque part 20 ... Lower layer part 2 of display body
1.21'...Display line 22...Protruding piece 22''
... Outer periphery of protruding piece 23 ... Lighting section 25 ... Through hole 30 ... Upper layer part of display body 31 ... Opaque part surrounded by display line

Claims (1)

[Claims] 1 In a translucent display body in which an opaque resin is integrally laminated on the surface of a translucent resin, and a display portion is formed through the translucent resin, the area surrounded by the display line in the display portion The inner non-transparent part is connected to the other non-transparent part by a thin continuous strip of opaque resin through holes bored in the translucent resin layer at appropriate positions on both sides of the display line. 1. A transparent display made of synthetic resin, characterized in that a projecting piece is connected to the back of the body by straddling the projecting piece, and both sides of the projecting piece serve as a lighting section where a communicating strip is provided.