JPH0727664Y2 - Control door in electrical equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to electric equipment such as video equipment, audio equipment, communication equipment, and household electric appliances, and more specifically, encloses operation buttons and the like provided in the electric equipment. It is related to the control door.

[Prior Art] Conventionally, as a control door for enclosing operation buttons and the like provided in an electric device, for example, FIG.
There is a structure shown in (b). FIG. 3A is a rear view of the control door (20), and FIG. 2B is a sectional view taken along the line CC. The control door (20) has a long and thin flat plate shape, and the outer surface side (21) and the inner surface side (22) are horizontal straight lines (that is, the wall thickness is constant), and are molded by a synthetic resin material. .

[Problems to be Solved by the Invention] However, the conventional control door (20) described above is used.
In the case of using a soft synthetic resin material (such as polystyrene resin) that is inexpensive and easy to process and molds a long, thin flat plate, use the chain double-dashed line (20a) in FIG. 4 (b). Swarfs occur as shown exaggerated somewhat,
Although not shown, there is a problem that twisting occurs. Therefore, it is necessary to lengthen the cooling time at the time of molding, but there is a problem that the molding processing cycle becomes long, and when correcting warpage in the post-processing of molding, there is a problem that the jig man-hours increase and the cost increases. there were.

Therefore, the present invention has been made in consideration of the above circumstances,
An object of the present invention is to provide a control door for electric equipment, which suppresses warpage and twisting of a molded product molded of, for example, a synthetic resin material and improves the working efficiency of the molding process. is there.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides an electric device including a control door for enclosing operation buttons and the like, wherein the control door has a flat outer surface, The inner surface side is formed into a slight curved surface such that the central portion in the longitudinal direction has a small thickness and the end portions have a large thickness, and a reinforcing rib is formed on the inner surface side. Is formed so that the rib height is high in the thin portion and the rib height is low in the thick portion.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to FIGS.

First, FIG. 2 is a schematic front view showing, for example, a video device as an electric device to which the embodiment of the present invention is applied, and FIG. 3 is a cross-sectional view taken along the line AA showing a main part.

The video device (1) includes a cabinet (2) formed of a synthetic resin molded product, a television unit (4) having a cathode ray tube (3) and the like, and a video tape recorder unit (5) having a recording / playback head and the like. ) And is an internal. The cabinet (2) is provided with a cassette insertion opening (7) which is opened for inserting and removing a video tape cassette (not shown). (8) is a control door for enclosing operation buttons (9) and the like for performing operations such as selection of a receiving channel and switching of recording / playback. (10) is a hook portion for pivotally attaching the control door (8) to a fulcrum shaft (11) of the cabinet (2), (1)
Reference numeral 2) is a latch striker, and the control door (8) is openably and closably attached to the cabinet (2) through a fulcrum shaft (11).

FIGS. 1 (a), (b) and (c) are views showing the control door (8), wherein FIG. 1 (a) is a rear view, FIG. 1 (b) is a sectional view taken along the line BB, Figure (c) is a side view. It should be noted that the illustration is exaggerated to some extent.

The control door (8) has a long and thin flat plate shape,
The outer surface side (15) is a straight line in the horizontal direction, and the inner surface side (16) is provided with a slight radius (curve) so that the central portion in the longitudinal direction is thin and the both end portions are thick. The control door (8) is molded from a soft synthetic resin material (for example, polystyrene resin) which is inexpensive and easy to process.

Further, (17) is the inner surface side (16) of the control door (8).
It is a grid-shaped reinforcing rib provided on the. The reinforcing ribs (17) have a high rib height in a thin portion (longitudinal center portion) of the control door (8) and a rib height in a thick portion (longitudinal end portions). It is formed to be low. In the present embodiment, the rib height of the reinforcing rib (17) is formed so as to gradually decrease from the central portion in the longitudinal direction of the control door (8) toward both ends, and the top of the reinforcing rib (17) is reduced. The side is substantially parallel to the outer surface side (15) as shown in FIG. 1 (b). The reinforcing ribs (17) provided in the width direction have the same rib height. In this way, by changing the rib height of the reinforcing rib (17) according to the wall thickness, the strength is made stronger in the thin portion and becomes relatively weak in the thick portion,
This is intended to make the strength uniform as a whole.

With such a configuration, the control door (8) causes warp due to the radius (that is, the difference in wall thickness) of the inner surface side (16), and particularly both ends in the longitudinal direction are on the outer surface side (15).
The generation of warp that warps is suppressed. In addition, the reinforcing ribs (17) strengthen the strength against twisting, and additionally suppress the occurrence of warpage during molding.

As a result, the cooling at the time of molding can be completed in a short time, so that the molding cycle can be shortened, and further, there is an advantage that the correction by the post-processing is unnecessary and the cost can be economically reduced.

The preferred embodiment of the present invention has been described above in detail.
The present invention is not limited to this, and it is obvious that various modifications can be made without departing from the scope of the present invention.

In the above-described embodiment, the present invention is applied to the video device (1) in which the television unit (4) and the video tape recorder (5) are installed in the same cabinet (2). Of course, it can be widely applied to other electric devices. Further, it is needless to say that the present invention can be applied not only to the control door (8) but also to a long and thin flat plate member.

As described above, according to this embodiment, warping occurs due to the radius (that is, the difference in wall thickness) of the inner surface side (16) of the control door (8), and especially both ends in the longitudinal direction are reflected to the outer surface side (15). In addition to suppressing such warpage, the reinforcing ribs (17) strengthen the strength against twisting, and additionally suppress the occurrence of warpage during molding. Therefore, the cooling at the time of molding can be done in a short time, so that the molding cycle can be shortened, and further there is an advantage that the correction by the post-processing is unnecessary and the cost can be economically reduced.

[Effects of the Invention] As described in detail above, according to the present invention, warping occurs due to the radius (that is, the difference in the wall thickness) of the inner surface of the control door, and in particular, both ends in the longitudinal direction are reversed to the outer surface. The generation of such warp is directly suppressed, and the generation of such warp is supplementarily suppressed by the reinforcing ribs, and the strength against twisting is also strengthened, so control with extremely little deformation The door can be molded. Moreover, by having such a configuration,
Cooling during molding can be done in a short time, so the molding cycle can be shortened, and further there is the advantage that no post-processing straightening is required and the cost can be reduced economically.

[Brief description of drawings]

1 (a), (b) and (c) are views showing a preferred embodiment of a control door in an electric device according to the present invention,
The same figure (a) is a rear view, the same figure (b) is a BB line sectional view taken on the line, and the same figure (c) is a side view. Further, FIG. 2 is a schematic front view showing an electric device to which an embodiment of the present invention is applied, and FIG. 3 is a sectional view taken along the line AA of the main part. Figure 4 (a)
(B) is a figure which shows the conventional control door, the same figure (a) is a rear view and the same figure (b) is CC sectional view taken on the line in FIG. (1) …… Electrical equipment (8) …… Control door (9) …… Operating buttons (15) …… Outside (16) …… Inside (17) …… Reinforcing ribs

Claims (1)

[Scope of utility model registration request] 1. An electric device having a control door for enclosing operation buttons and the like, wherein the control door has a flat outer surface, a thin inner wall at the center in the longitudinal direction, and a thin wall at both ends. In addition to being formed on a slightly curved surface so that the wall thickness becomes thicker, a reinforcing rib is formed on the inner surface side, and the reinforcing rib has a high rib height in a thin wall portion and a thick wall portion in a thick wall portion. A control door for an electric device, wherein the control door is formed to have a low rib height.