JPH0747560A - Processing of cabinet having light guide part for indicator and cabinet - Google Patents

Abstract

PURPOSE:To enhance visibility and to achieve cost-down by preventing the light leakage of an indicator part for displaying the function/operation state of an apparatus. CONSTITUTION:A transparent resin is injected into a mold to fill a cabinet 1 and a cavity 13a to mold a light guide part for the cabinet 1 and an indicator and the molded light guide part for the indicator is introduced into the through- hole part of the cabinet 1. By this constitution, the attaching process of the light guide part to the main body of the cabinet is conserved and a main body part and the light guide part separately molded from the same material are optically separated and, therefore, the transmissivity at the boundary part of both of them is extremely reduced and light leakage is prevented to enhance the visibility of the indicator and cost-down can be also achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cabinet processing method suitable for use in an electronic device of a cabinet having a small and thin shape such as a tape recorder device with a radio, and more particularly, to a method of processing the device. The present invention relates to a cabinet processing method in which visibility is improved by preventing light leakage of an indicator portion added to display a function / operation state. Specifically, we have improved the process of attaching a light guide (light guide part for indicators) that is molded from a transparent material and has a light-collecting effect to a cabinet that is also molded from a transparent material. The present invention relates to a cabinet processing method and a cabinet that realizes cost reduction by reducing the cost.

[0002]

2. Description of the Related Art In a cabinet having a small size and a thin shape such as a tape recorder device with a radio, a light guide using a transparent molding material, that is, a guide for an indicator for displaying the function and operating state of the device. A light section is provided. In this conventional cabinet, a method is used in which the light guide body (light guide portion for an indicator) having a light condensing function and the cabinet are formed of a transparent material.

FIG. 2 is a schematic side sectional view for explaining a conventional method of processing a cabinet with a light guide section for an indicator.
FIG. 3 is a diagram showing a state before attaching the light guide, and (2) is a diagram showing a state after being attached. In the figure, 1 is a cabinet main body, 1a is a through hole thereof, 2 is a light guide,
Arrow A indicates the pressing direction.

In the conventional cabinet processing method, as shown in FIG. 2 (1), the cabinet main body 1 to which the light guide 2 is attached and the light guide 2 are molded separately. . Then, in the subsequent steps, FIG.
As indicated by an arrow A, the light guide 2 is press-fitted from below the through hole 1a of the cabinet body 1 and is integrally attached to the cabinet body 1.

When the light guide 2 is attached, an adhesive or the like is used to fix the light guide 2 and the cabinet body 1 to each other. Thus, the light guide 2 and the cabinet body 1
If and are formed of the same transparent material, the light guide (light guide part for indicator) 2 and the cabinet body 1 are optically separated, and the transmittance at the boundary between them is extremely reduced. Therefore, light leakage is prevented and visibility is improved.

However, in the conventional processing method described with reference to FIG. 2, the light guide 2 and the cabinet body 1 need to be separately molded and then assembled, which is particularly small and thin. In the case of a cabinet, there is a problem that the mounting process is troublesome and the cost increases. As another conventional processing method, the light guide 2 and its peripheral portion (cabinet body 1) are molded with a transparent member by in-mold molding or the like, and then the periphery except the light guide 2 is removed. A method of covering the portion with an opaque ink material by silk printing or the like is also used.

The use of such a processing method has an advantage that the processing steps are simplified as compared with the method of FIG. However, in the case of this method, the light entering from the light guide 2 is transmitted to the inside of the transparent member in the peripheral portion (cabinet main body 1), which causes a problem such as light leakage.

[0008]

SUMMARY OF THE INVENTION The present invention solves such inconveniences in the conventional method of manufacturing a cabinet with a light guide part for an indicator, and saves a process for attaching the light guide part to the cabinet. An object of the present invention is to provide a method of processing a cabinet with a light guide part for an indicator, which does not require an adhesive or the like for fixing the light guide part and realizes cost reduction.

[0009]

The present invention relates to a machining method for molding a cabinet using a molding die, a movable pin for forming a through hole in a part of the cabinet, and a movable pin inside the cabinet. Having a cavity for molding the light guide portion for the indicator, and comprising an ejector pin for pressing the resin filled in the cavity to the through hole portion of the cabinet, injecting a transparent resin into the mold, After the cabinet and the cavity are filled with a transparent resin to mold the cabinet and the light guide part for the indicator, the molded light guide part for the indicator is press-fitted into the through hole part of the cabinet by an ejector pin. Is.

[0010]

In the method for processing a cabinet with a light guide part for an indicator of the present invention, the process for attaching the light guide part for an indicator to a cabinet having a small and thin shape is improved, and at the same time as the completion of the molding process of the cabinet. The mounting process of the light guide portion for the indicator is completed (the invention of claim 1).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A working method of a cabinet with a light guide portion for an indicator of the present invention will be described in detail with reference to the drawings. This invention has a feature in the processing step, and since the light guide part for the indicator is formed of the same translucent material as the cabinet, the light transmittance at the boundary part between the two is drastically reduced and light leakage is prevented. And the visibility of the indicator is improved.

FIG. 1 is a schematic side sectional view for explaining a processing method of a cabinet with a light guide portion for an indicator of the present invention.
(1) is a diagram showing the mutual positional relationship between the mold and each pin at the start of molding the cabinet, (2) is a diagram showing the resin filled in the cavity pressed into the through hole of the cabinet, (3) FIG. 7 is a diagram showing a processed cabinet. Reference numerals in the figure are the same as those in FIG. 2, and 11 and 11 '
Is a mold, 11a is a light guide gate, 12 is a movable pin,
Reference numeral 13 indicates an ejector pin, reference numeral 13a indicates a cavity for forming the light guide portion for the indicator, arrow B indicates the pressing direction of the ejector pin 13, and arrow C indicates the moving direction of the movable pin 12.

As shown in the schematic side sectional view of FIG. 1 (1),
According to the cabinet processing method of the present invention, the molds 11 and 11 'for molding the cabinet body 1, the movable pin 12 forming the through hole portion 1a in a part of the cabinet body 1, and the cabinet body 1 are formed. An ejector pin 13 having a cavity 13a for molding a light guide portion for an indicator is provided inside. And mold 1
Transparent resin is injected into the cabinet body 1 and the cavity 13a by injecting a transparent resin into the housings 1 and 11 'through an inlet (not shown).

In this case, one mold 11 is provided with a light guide gate 11a, and a part of the transparent resin injected into the cabinet body 1 is used as the light guide gate 11a. To the cavity 13a. Therefore, the light guide body 2 for an indicator can be molded in only one step.

Thereafter, as shown in FIG. 1 (2), the molded indicator light guide 2 is pushed up by the ejector pin 13 in the direction of arrow B, and the movable pin 12 is moved in the direction of arrow C. , Is press-fitted into the through hole 1a of the cabinet body 1. Through the above steps, as shown in FIG. 1C, a cabinet in which the light guide body 2, that is, the light guide portion for the indicator is attached to the through hole portion 1a provided in the cabinet body portion 1 is manufactured.

As described above, according to the cabinet processing method of the present invention, almost simultaneously with the completion of the molding step of the cabinet body 1, the processing step of the indicator light guide 2 is completed, and thereafter, the light guide 2 is completed. Since the press-fitting step of 1 is continuously executed, the number of processing steps is reduced as compared with the conventional processing method. It should be noted that when the press-fitting process of the light guide 2 is started, the light guide 2 is not deformed by the pressing force based on the melting temperature and the curing temperature of the resin material, and the light guide 2 can be joined to the cabinet body 1. Set to a proper timing.

[0017]

According to the cabinet processing method of the present invention, the step of attaching the light guide body (light guide portion for the indicator) to the cabinet body is reduced, and the cabinet is separately formed of the same material. Since the main body and the light guide body are optically separated from each other, the transmittance at the boundary between them is extremely reduced, and light leakage is prevented. Therefore, the visibility of the indicator is improved.

Moreover, cost reduction is achieved by reducing the number of processing steps. Furthermore, since the adhesive or the like used when attaching the light guide is not required, the cost can be similarly reduced.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view illustrating a method of processing a cabinet with a light guide portion for an indicator according to the present invention.

FIG. 2 is a schematic side cross-sectional view illustrating a method of processing a conventional cabinet with a light guide unit for an indicator.

[Explanation of symbols]

 1 Cabinet Main Body 1a Through Hole 2 Light Guide 11 Mold 11 'Mold 11a Light Guide Gate 12 Movable Pin 13 Ejector Pin 13a Cavity

Claims (2)

[Claims] 1. A processing method for molding a cabinet using a molding die, wherein a movable pin for forming a through hole portion in a part of the cabinet and a light guide portion for an indicator are formed inside the cabinet. And a ejector pin for pressing the resin filled in the cavity to the through hole portion of the cabinet, and injecting the transparent resin into the mold so that the cabinet and the cavity are transparent. After the resin and the cabinet and the light guide for the indicator are molded, the molded light guide for the indicator is press-fitted into the through hole of the cabinet by an ejector pin. Of processing cabinet with attached. 2. A cabinet formed by the method for processing a cabinet with a light guide portion for an indicator according to claim 1.