JP2887856B2 - Remote control case and its manufacturing method and mold for manufacturing remote control case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a key Toppu is Yu, respectively
An upper case with a plurality of through holes that are fitted and exposed at the top ,
Remote control of the case and a pressing rib for holding the connecting portion of projecting the key top from the upper case on the back side and its
And a mold for manufacturing a remote control case .

[0002]

2. Description of the Related Art FIG. 8 is a sectional view of a remote controller having a conventional case, FIG. 9 is a view of the case of FIG.
0 is a cross-sectional view of the case of FIG. 9 along the line CC, and FIG. 11 is a cross-sectional view for explaining a mold for molding the case of FIG.

The conventional case shown in FIG. 8 includes a key top 1 made of an elastic material such as silicon rubber and an upper case 3 having a plurality of through holes 2 from which the key top 1 is exposed.
There is a pressing rib 4 projecting from the upper case 3 to the back side and holding the connecting portion 1a of the key top 1. When the key top 1 is pressed downward in FIG.
When the movable contact 5 provided on the back surface of the key top comes into contact with the fixed contacts 7 and 8 on the substrate 6 to turn on the electrical connection, and the pressing operation on the key top 1 is released, the key top 1 becomes its own. Since the movable contact 5 is moved upward in FIG. 8 by the elastic force, the movable contact 5 is separated from the fixed contacts 7 and 8 on the substrate 6 and the electrical connection is turned off. Thus, the switching operation of the remote controller is obtained.

The pressing ribs 4 are composed of vertical ribs 4a and horizontal ribs 4b arranged in the vertical and horizontal directions in FIG. 9, respectively, and are formed continuously in a lattice. When this conventional case is formed by the fixed mold 11 and the movable mold 12 shown in FIG. 11, a concave portion 11a for molding the upper case 3 provided on the fixed mold 11 and a presser formed on the movable mold 12 are formed. The molten resin 13 is poured into the concave portion 12a for forming the rib 4 and the upper case 3 and the holding rib 4 are integrally formed.

FIG. 12 is a view of a modification of the conventional case viewed from the back side, FIG. 13 is a cross-sectional view of the case of FIG. 12 taken along line D-D, and FIG. 14 is a mold for molding the case of FIG. It is sectional drawing explaining.

Another upper case 14 shown in FIG. 12 is provided with the above-mentioned through hole 2 and has a vertically long through hole 2a vertically longer than the through hole 2 and a horizontally long through hole 2b longer in the horizontal direction. I have. When the case 14 is formed, as shown in FIG. 14, a concave portion 15 a for forming the upper case 14 provided on the fixed die 15 and a pressing rib 4 formed on the movable die 16 are formed. The molten resin 17 is poured into the recess 16a for use in the upper case 14 and the upper case 14 and the holding rib 4 are integrally formed.

[0007]

In the prior art described above, when molding various remote control cases, both a fixed die and a movable die corresponding to each case are required. In addition to the increase in cost, there is also a problem that a considerable amount of labor and work time are required when replacing the mold.

[0008] The present invention has been made in view of the circumstances in the prior art, the purpose, when molding the case of the various remote control, by sharing one of the stationary mold and the movable mold Reduces the cost of mold production
As well as the time and labor required to replace the mold.
Reduction can be the remote control of the case and of the preparation and the remote control
An object of the present invention is to provide a mold for manufacturing a case .

[0009]

SUMMARY OF THE INVENTION To achieve this object, the present invention provides an upper case having a plurality of through holes in which key tops are loosely fitted and exposed at the upper part, and a back side from the upper case. in the remote control case with a pressing rib which holds the connecting portion of projecting the key top, the pressing
The ribs are located between the holes with spatial periodicity in the vertical and horizontal directions.
And the length of the holding rib is set smaller than the length of the through hole , and at least.
The other one of the through holes has two pressers opposed to each other with the through hole interposed therebetween.
Arranged at a position including the position having the spatial periodicity of the rib
It is made to be done . Also remote control case
In the mold for manufacturing the
A plurality of recesses formed in the first abutment surface for forming
And a first for forming the through hole between these recesses.
Mold having a plurality of convex portions formed on the contact surface of the first mold
And a first contact surface including a surface of the projection of the first mold.
And a second contact surface, and the second contact surface is vertically and horizontally spaced.
At a position having periodic periodicity, at least the first mold
It is formed at a position facing the recess, and has a length dimension of the through hole.
Forming presser ribs set smaller than the length dimension
And a second mold having a plurality of periodic recesses for
It is made to become. In addition, a remote control case
In the manufacturing method, a plurality of recesses formed on the first contact surface are formed.
Part and a plurality of concave portions formed on the first contact surface between these concave portions.
A first mold having a number of convex portions, and a vertical and horizontal
Formed at a location with spatial periodicity and
Multiple holes each smaller than the length of the through hole
A first abutment is applied to each of the second molds having the periodic recesses.
Surface and a second abutment surface, at least a first gold
The concave portion of the mold and the periodic concave portion of the second mold are opposed to each other.
And pour the molten resin into the space formed at the opposite location.
Filling the upper mold with the concave portion of the first mold.
The upper surface of the base, the through-hole with the projection, and the second mold.
A pressing rib is formed by the periodic recess.
is there.

[0010]

Since DETAILED DESCRIPTION OF THE INVENTION The present invention configured as described above, to case first at the time of molding of the mold and a second mold a first mutually equivalent
When brought into contact with contact surface and the second contact surface, a small number field of the recess of the first mold than periodic recess for presser rib molding
In this case, a portion of the periodic concave portion faces the convex portion for forming the through hole so that the opening of the periodic concave portion is closed, and the length dimension of the periodic concave portion for forming the holding rib is formed. There since less than the length of the projecting portion for hole forming, periodic recesses of the upper Symbol part is in a state of being isolated from the other recess. In this state the first
The mold and the second recess upper Symbol part or into the molten resin in the space between the molds without being filled with the molten resin, only other recesses not facing the projection portions for hole molding Filled with molten resin. Thus, holes and push various shaped than the first shape and be Rukoto of projections seed s for permeable holes of the mold
It is a call for molding the case having the example ribs.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a remote control case according to the present invention will be described below with reference to the drawings. FIG. 1 is a view of a remote control case according to one embodiment of the present invention as viewed from the back side, FIG. 2 is a cross-sectional view of the case of FIG. 1 taken along the line AA, and FIG. It is sectional drawing explaining a type | mold.

The remote controller case of this embodiment shown in FIG. 1 has an upper case 22 provided with a plurality of through holes 21 from which the key tops 1 of FIG. Holding ribs 23 and 24 for holding the connecting portion 1a of the top 1 are provided. One holding rib 23
Are arranged between the through holes 21 adjacent to each other in the vertical direction in FIG. 1, and the length dimension of the holding rib 23 is
Are set smaller than the length in the horizontal direction. Similarly, the other holding ribs 24 are also arranged between the respective adjacent through holes 21 in the horizontal direction in FIG. 1, and the length of the holding rib 24 is longer than the length of the through hole 21 in the vertical direction. Each is set small. When the remote controller is formed, as shown in FIG. 3, a fixed mold 31 provided with a concave portion 31a for forming the upper case 22 and a convex portion 31b for forming the through hole 21 and a concave portion 32a for forming the holding rib 24. And a movable mold 32 provided with a concave portion (not shown) for molding the other holding rib 23.

As another remote control case, for example, as shown in FIGS. 4 and 5, the above-described through hole 21 is provided, and the vertically long through hole 2 which is longer than the through hole 21 is provided.
Some include an upper case 22a provided with the first case 1a and a horizontally long through hole 21b that is long in the horizontal direction. In the case of the upper case 22a, a vertically long through hole 21a and a horizontally long through hole 21b are provided as compared with the upper case 22, so that the through holes 21a,
The holding ribs 23 and 24 are not provided in a portion corresponding to 21b. When molding another remote controller, as shown in FIG. 6, the movable mold 32, a concave portion 33a for forming the upper case 22, a not-shown convex portion for forming the through hole 21, and a through hole 21 are formed.
a, a fixed mold 31 provided with a projection 33b for molding and a projection 33c for molding the through hole 21b is used.

In this embodiment, when the case shown in FIG. 1 is formed by the fixed mold 31 and the movable mold 32, the pressing ribs 24 are kept in a state where the molds 31 and 32 are in contact with each other.
The molten resin 34 is poured into the concave portion 32a for molding and the not-shown concave portion for forming the holding rib 23 and the concave portion 31a for forming the upper case 22, and the upper case 22 and the holding ribs 23 and 24 are integrally formed. It has become.

For example, when another case shown in FIG. 4 is formed, when another fixed mold 33 and the movable mold 32 are brought into contact with each other, a part of the concave portion 32a is formed in the fixed mold 33. The opening of the concave portion 32a is partially closed to face the convex portion 33c for forming the through hole 21b to be formed, and the length of the concave portion 32a is set to the convex portion 33c for forming the through hole 21b.
Are smaller than the lengths in the vertical direction, and the part of the recess 32a is isolated from other recesses. In this state, even if the molten resin 35 is poured into the cavity between the fixed mold 33 and the movable mold 32, the concave portion 32a is not filled with the molten resin 35, and the convex portion 33c for forming the through hole 21b is not filled. Other recess 32a not facing
Only the molten resin 35 is filled. Similarly, the through hole 21a
Only the holding ribs 23 which are not opposed to the molding protrusions 33b are filled with the molten resin 35 while the through holes 21a are filled.
The concave portion for molding the pressing rib 23 facing the convex portion 33b for molding is not filled with the molten resin 35.

In this embodiment, the movable mold 32 can be used as a common mold. That is, when molding various cases, one of the fixed mold and the movable mold can be shared. it can.

In this embodiment, the movable mold 32 is shared and the fixed mold 31 is dedicated. However, if necessary, the fixed mold is shared and the movable mold is dedicated. You can also. Further, as shown in FIG. 7A, a large number of holding rib recesses 42 are provided in the common mold 41 at predetermined intervals, and every other recess 42 is used.
As shown in FIG. 7B, only a part of the recess 42 is selectively used, or as shown in FIG.
By using every other concave portion 42 different from the case shown in FIG. 7A, the versatility of the common mold 41 for various remote control cases can be enhanced.

[0018]

Since the present invention is constructed as described above, the first mold and the first mold are used when molding various remote control cases.
Since it is Ru can be shared one of the second mold, made mold
The cost of forming with it a low reduction, labor and machine time required die change during molding the case of the various remote control
It is the reduction to Rukoto.

[Brief description of the drawings]

FIG. 1 is a view of one embodiment of a remote control case according to the present invention as viewed from the back side.

FIG. 2 is a sectional view taken along line AA of the case of FIG. 1;

FIG. 3 is a sectional view illustrating a mold for molding the case of FIG. 1;

FIG. 4 is a view showing a modification of the case of the present invention.

FIG. 5 is a cross-sectional view of the case of FIG. 4 taken along line BB.

FIG. 6 is a sectional view illustrating a mold for molding the case of FIG. 4;

FIG. 7 is a cross-sectional view illustrating a state in which various cases are molded.

FIG. 8 is a sectional view of a remote controller having a conventional case.

9 is a view of the case of FIG. 8 as viewed from the back side.

FIG. 10 is a sectional view taken along line CC of the case of FIG. 9;

FIG. 11 is a sectional view illustrating a mold for molding the case of FIG. 9;

FIG. 12 is a view of a modification of the conventional case viewed from the back side.

FIG. 13 is a sectional view taken along line DD of the case of FIG. 12;

FIG. 14 is a sectional view illustrating a mold for molding the case of FIG. 12;

[Explanation of symbols]

 21, 21a, 21b Through-hole 22, 22a Upper case 23, 24 Holding rib 31-33 Die 31a-33a Depression 31b, 33b, 33c Projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) H01H 13/00-13/76 H04Q 9/00 371

Claims (3)

(57) [Claims] An upper case having a plurality of through holes through which key tops are loosely fitted and exposed to an upper portion, and a rear portion protruding from the upper case to hold a connecting portion of the key tops. in the remote control case and a pressing rib, the pressing
The ribs are located between the holes with spatial periodicity in the vertical and horizontal directions.
And the length of the pressing rib is set to be smaller than the length of the through hole , and
One said through-hole is two fronts facing each other across said through-hole.
A position including the position having the spatial periodicity of the holding rib.
A remote control case, characterized by being arranged in a remote control. 2. The key tops are loosely fitted to each other to expose
An upper case with multiple through holes
Press the key top to hold the connection part of the key top.
For manufacturing a remote control case having ribs
In the mold, a second step is performed to form an upper surface of the upper case.
A plurality of recesses formed on the contact surface of
Formed on the first contact surface to form the through hole between
A first mold having a plurality of formed convex portions, and the first mold
A first contact surface including a surface of the projection of the mold and a second contact surface.
Abut on the contact surface and provide spatial periodicity to the second contact surface both vertically and horizontally.
At least in the recesses of the first mold
Formed at opposing positions, and the length dimension is the length dimension of the through hole
Forming the holding ribs set smaller than
And a second mold having a plurality of periodic recesses for
For manufacturing a remote control case characterized by the fact that
Mold. 3. The key tops are loosely fitted to each other to expose the key tops.
An upper case with multiple through holes
Press the key top to hold the connection part of the key top.
The method of manufacturing a remote control case having a rib
A plurality of recesses formed on the contact surface of
A plurality of convex portions formed on the first contact surface therebetween.
The first die and the second contact surface have spatial periodicity in the vertical and horizontal directions.
Formed at the position where the through hole has the length dimension
With multiple periodic recesses each set smaller than
The second mold and the first contact surface and the second mold, respectively.
Abut on a second contact surface, at least the first mold
Opposes the concave portion of the second mold and the periodic concave portion of the second mold.
And let the molten resin flow into the space formed
Filling the recesses of the first mold
The upper surface of the upper case, the through- hole with the projection,
The holding rib is formed in the periodic concave portion of the second mold.
Of a remote control case characterized in that
Law.