JP3349341B2 - Molding method of linked type composite button - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of molding a linked type composite button, and more particularly to a linked portion for connecting adjacent push buttons via a hinge and a linked type formed by a fixed die and a movable die between the hinges. The present invention relates to a method for molding a composite button.

[0002]

2. Description of the Related Art Conventionally, a plurality of various operation buttons related to recording / reproduction of a magnetic tape are arranged on a front panel or a remote control operation unit of a home electronic device, for example, a magnetic recording / reproduction device. A combination-type composite button that is connected and arranged in a row or a connection-type composite button that is connected and arranged in a disc shape is awarded.

[0003] Usually, these linked-type composite buttons are configured to be mounted on a mounting portion formed on a front panel or the like via a button holder.

[0004] In the linked composite button, after the engaging portion formed on the composite button is attached to the engaging hole formed on the button holder, the button holder is attached to the fitting portion ( Or screw part).

[0005] Conventionally, when attaching a link-type composite button to a mounting portion, the composite button is prepared by mounting a button holder on the back (or rear) of the mounting portion, and from the front side (or front) of the mounting portion. Whether to attach the composite button or to prepare the composite button on the button holder in advance and attach it to the back (or rear) of the attaching portion is selected according to the assembly process of the front panel.

[0006] As described above, the conventional combination type composite button (hereinafter, referred to as "combination button")
Abbreviated as composite button. ) And its mold.

First, the structure of the composite button will be described with reference to FIG.

FIG. 8 shows a conventional composite button, FIG. 8a is a front view as viewed from the direction of operating the composite button, FIG. 8b is a perspective view as viewed from the upper side of the composite button, and FIG. FIG. 8D is a perspective view as seen from the side, and FIG. 8D is a rear view as seen from the back side of the composite button.

The composite button 60 has a circular surface on which a plurality of push buttons, for example, a record / reproduce button 61, a fast forward button 62, a rewind button 63, a stop button 64, and the like, are divided and arranged with a press surface.

Each of the push buttons has an operation display 61a, 62 of a device controlled by the push operation of the push button.
a and 63a are provided as appropriate in an identification form meaning a control function of the apparatus. (FIG. 8A) Also, on the back side of the push button, a switch operator 52a described later is provided.
The operation rods 61b, 62b, 63b, 64b for transmitting a pressing operation by a finger to the switch operator extend at a position facing the switch operation element. The contact rods 61c and 62 for preventing the wobble and the like accompanying the pressing operation of the push button are provided near the operation rod.
c, 63c and 64c are formed as a pair. (FIG. 8D) Also, the push buttons have button bodies 61d, 62d, 63 on the peripheral surface extending from the outer peripheral edge of each push button and substantially perpendicular to the pressing surface.
d, 64d are formed.

For example, hinges 61e and 64e, which extend thinly from the inner edge of the button body and have a step at the outer edge of the button body, are adjacent to the button body 62d.
And two spaces are formed in the vicinity of the button bodies 61d and 64d with spaces W6 between them. (FIGS. 8b and 8c) Further, an annular fixing portion 65 is formed at the extension end of the hinge to connect the hinge at a position separated by a certain distance from each button main body and to serve as a mounting base for the composite button.

The annular fixing portion 65 is thinly extended from the outer peripheral edge of the fixing portion, and a plurality of engaging portions 66 are provided at the extending end. (FIG. 8c) The engaging portion 66 has a tip 66a, a locking step 66b, and an inclined surface 66c to form an engaging claw. (FIG. 8b) Next, the mounting structure of the composite button and the button holder is shown in FIGS.
0 will be described.

FIG. 9 shows a composite button, FIG. 9a is a front view as viewed from the direction in which the composite button is operated, and FIG. 9b is a side sectional view taken along line EE in FIG. 9a. 10 shows a button holder formed corresponding to the composite button, FIG. 10a is a front view of the button holder viewed from the mounting direction of the composite button, and FIG.
It is a sectional side view in the FF line of a.

In FIG. 9, a plurality of push buttons are connected to adjacent push buttons by an annular fixing portion 65, and are formed integrally by a molding die.

9B, the composite button 60 has an operating rod 61b formed on the push button 61, an abutment rod 64c formed on the push button 64, and an annular fixing portion 6 formed via a hinge 64e.
5 and an engagement portion 66 formed on the annular fixing portion, respectively.

In FIG. 10, a button holder 70 has a structure corresponding to the composite button 60 shown in FIG. 9, and is formed integrally with a plurality of screw portions 71 protruding at a plurality of positions of the button holder.

The screw portion 71 is provided with a rib 72 having an inclined surface 72a in the projecting direction of the screw portion, and a screw hole 71a for mounting the screw portion to the mounting portion 1.

The button holder 70 shown in FIG.
Light from a light source by a light emitting element 51 described later is displayed on the display unit 61.
a light guide portion 73 that guides the light from the light source to the outside of the display portion so as not to dissipate the light from the light source portion is formed in a deformed cylindrical shape;
A through hole 74 through which the operating rod 61b is inserted is formed.

Further, the screw portion 71 is engaged with the engaging portion at a position facing the engaging portion 66, and has a circumferential width W8 slightly larger than the circumferential width W7 of the engaging portion. Engagement opening 7
5 are formed.

Next, the mounting state of the composite button to the button holder will be described with reference to FIG.

FIG. 11 is an explanatory view for explaining a state when the composite button is mounted on the button holder with reference to respective sectional views. FIG. 11a is an explanatory view showing a state where the engaging portion is guided to the opening of the mounting portion. FIG. 11B is an explanatory diagram showing a state in which the engaging portion is guided to the engaged opening of the button holder, and FIG. 11C is an explanatory diagram showing a state in which the engaging portion is engaged with the engaged opening.

In FIG. 11, reference numeral 50 denotes a printed circuit board provided with a light emitting element 51 and a switch 52 having a switch operator 52a.

In FIG. 11a, a button holder 70 is mounted on the back side of the mounting portion 1 by screwing a screw portion 71 of the button holder in advance. Then, the composite button 60 is inserted from the front side of the mounting portion 1 and mounted on the button holder 70.

When the composite button 60 is inserted into the opening 2 formed in the mounting portion 1, the engaging portion 66 of the composite button 60
Slides while contacting the inclined surface 66c with the opening edge 2a, and the sliding causes the hinge 64e and the engaging portion 66 to bend inwardly of the opening 2 and elastically deform together with the annular fixing portion 65.

When the composite button 60 is guided to the engaged opening 75 of the button holder 70 as shown in FIG.
6 slides while contacting the inclined surface 66c with the edge 75a of the engaged opening 75 with the insertion of the engaging portion into the engaged opening 75, and engages with the sliding by the inclined surface. Joint 1
6 is further flexed.

When the annular fixing portion 65 comes into contact with the rib 72 and slides on the inclined surface 72a, the engaging portion 66
Is inserted into the engaged opening 75.

Thereafter, the engaged opening 75 by the composite button 60
The annular fixing portion 65 slides on the sliding contact surface 72 b of the rib 72 with further insertion into the rib 72.

As shown in FIG. 11C, when the composite button 60 engages with the engaged opening 75 of the button holder 70, the locking step 66b reaches the rear surface 75b of the engaged opening 75 at the position where the engaging rear surface 75b reaches the rear surface 75b. The engagement portion 66 is locked by the restoring force, and the engagement portion engages with the button holder 70.

Next, a molding die for molding the composite button, particularly a molding die for the hinge, the annular fixing portion and the engaging portion will be described with reference to FIGS.

FIG. 12A is a rear view of the composite button as viewed from the back, and FIG. And FIG.
2c is a sectional view of the mold along the line GG, and FIG.
The sectional view of the mold along the line G ′ and FIG.
It is a metal mold | die sectional drawing in a line.

FIG. 13A is a perspective view of the composite button as viewed from the lateral side, and FIG. FIG. 13C is a sectional view of the mold along the line HH, and FIG.
FIG. 13E is a mold sectional view taken along the line H′-H ′, and FIG. 13E is a mold sectional view taken along the line H ″ -H ″.

In each of the sectional views, a portion indicated by oblique lines rising to the left indicates a fixed mold, a portion indicated by oblique lines to the upper right indicates a movable mold, and a portion indicated by oblique cross lines indicates a slide mold.

The button bodies 61d, 62d, 63 of the composite button 60
d and 64d are molded by filling a molding space 151 formed by the fixed mold 101 and the slide mold 121 with a thermoplastic resin.
A parting surface (butting surface) 130 with which 1 slides is provided on the same surface as the outer peripheral surface 60a of each button body (FIG. 12c).

Then, for example, the hinge 64e and the annular fixing portion 65 are molded by a continuous molding space 161 formed by the movable mold 111 and the slide mold 121 (FIG. 1).
2d, FIG. 13c).

In other words, the space formed between the button body and the annular fixing portion and the space formed between the adjacent hinges (that is, the space formed between the button 62 and the hinge 62e in FIG. 8C).
4e is formed between the movable mold 111 and the space W6).
Is formed by a slide mold 121 that slides radially with respect to the surface of the fixed mold 101 in a direction perpendicular to the moving direction of the mold.

The engaging portion 66 is molded by a continuous molding space 161 formed by the movable mold 111, and the parting surface 132 is provided on the same surface as the locking step portion 66b (FIGS. 12D, 12E, and 12E). 13d, 13e).

As described above, in the linked type composite button of the conventional example, a plurality of push buttons are connected via a hinge at a position separated from the button body by a predetermined distance so that each push button does not interfere with the adjacent push button. The connection is constituted by an annular fixing portion serving as a mounting base for the connection-type composite button.

[0038] In addition to the normal fixed mold and the movable mold, the molding mold that forms a space between the annular fixed portion and the button body has a radial shape in a direction perpendicular to the moving direction of the movable mold. Is provided with a slide mold. That is, the slide mold is provided radially around the entire circumference of the linked composite button.

For this reason, not only is the structure of the mold large and complicated, and the cost of the mold is increased, but also the unit price of the molded resin product is high because the number of molds to be manufactured from the same mold is reduced. There was a disadvantage of becoming.

Therefore, it has been a problem to reduce the cost of the mold for molding and the unit price of the molded product in the linked composite button as compared with the conventional example.

[0041]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has an object to provide an articulated mold that can be formed only with a fixed mold and a movable mold without using a slide mold. Provided is a method for molding a button.

[0042]

In order to achieve the above object, according to the present invention, a continuous engaging claw portion formed between adjacent push buttons is recessed in a substantially U shape between adjacent engaging claws. Then, the concave portion is formed by a movable mold.

The space between the hinges formed by the engaging claw continuation portions is formed by abutment of the movable mold in contact with a fixed mold having a draft outside the outer peripheral edge of the push button.

[0044]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an embodiment of the present invention;

First, the structure of the composite button will be described with reference to FIGS.

FIG. 1 shows the composite button of the embodiment, FIG. 1a is a front view of the composite button as viewed from the operating direction, FIG. 1b is a perspective view of the composite button as viewed from above, and FIG. FIG. 1d is a perspective view from the side and FIG. 1d is a rear view from the back of the composite button.

FIG. 2 is an enlarged view of the engaging portion shown in FIG. 1. FIG. 2a is an enlarged view of the engaging portion shown in FIGS. 1b and 1c, and FIG. 2b is an enlarged view of the engaging portion shown in FIG. 1d. FIG.

The composite button 10 has a circular surface on which a plurality of push buttons, for example, a record / reproduce button 11, a fast forward button 12, a rewind button 13, a stop button 14, and the like have a press surface and are arranged separately.

The operation surfaces 11a, 12a, and 1 of the device controlled by the pressing operation are displayed on the respective pressing surfaces.
3a is provided as appropriate in an identification form meaning a control function of the apparatus. (FIG. 1a) A switch operator 52a to be described later is provided on the back side of the push button.
The operation rods 11b, 12b, 13b and 14b for transmitting the pressing operation by the finger to the switch operator at the position opposing to. The contact rods 11c, 12c, and 13 are provided at positions near the operation rod to prevent the push button from wobbling due to a pressing operation by contacting a concave bottom surface 21c described later.
c and 14c are respectively formed as a pair. (FIG. 1d) Also, the push buttons have button bodies 11d, 12d, 13 on the peripheral surface extending from the outer peripheral edge of each push button and substantially perpendicular to the pressing surface.
d and 14d are formed.

For example, the button body 12d has a plate-like hinge 1 which extends thinly from the outer edge of the button body, has a step at the inner edge of the button body, and has an extension surface 12k described later.
2e are formed in two places near the adjacent button bodies 11d and 14d. (FIGS. 1b and 1c) Further, an engaging claw 1 having an inclined surface 12f and having a distal end portion 12g and a locking step portion 12h is provided at the extension end of the hinge 12e.
2i are respectively formed. (FIG. 1c) Then, as shown in FIG. 2a, the engaging claw 12i is formed with an engaging claw continuous portion 15 for connecting the engaging claw and the adjacent engaging claw 14i. Engaging claws 12i and 14i
Thus, the engaging portion 16 is formed.

The circumferential width W1 of the engaging part 16 is
It is formed smaller than the circumferential width W2 between the hinge 2e and the adjacent hinge 14e. Steps 12j and 14j are formed by this width difference, and the steps constitute a fulcrum at the time of pressing a push button described later. A space W3 is formed between the hinge 12e and the adjacent hinge 14e.

It should be noted that the step portions 12j and 14j are
6 is formed so as to be substantially flush with the locking step portion 12h formed at 6. The slight step facilitates engagement between the engaging portion 16 and an edge portion 22b of the thin portion 22, which will be described later.

As shown in FIG. 2B, the engaging claw continuation portion 15 has extension surfaces 12k and 1k of hinges 12e and 14e.
A concave portion 15a having a U-shaped concave on the 4k side is formed.

Next, the mounting structure of the composite button and the mounted portion will be described with reference to FIGS.

FIG. 3 shows the composite button, FIG. 3a is a front view as viewed from the direction in which the composite button is operated, and FIG. 3b is a side sectional view taken along line AA of FIG. 3a. FIG. 4 shows a mounted portion, and FIG.
FIG. 4A is a front view of the mounted portion as viewed from the mounting direction of the composite button, and FIG. 4B is a side sectional view taken along line BB of FIG. 4A.

In FIG. 3, in the composite button 10, a plurality of push buttons are connected to adjacent push buttons by an engaging portion, and are integrally formed by a molding die.

FIG. 3B shows an operating rod 11b formed on the push button 11 of the composite button 10, an operating rod 14c formed on the push button 14, and an engaging portion 1 formed via a hinge 14e.
6 are shown.

In FIG. 4, the mounting portion 20 has a structure corresponding to the composite button 10, has a recess 21 for mounting the composite button, and is formed integrally with the mounting portion 1 of the front panel.

The recess 21 has a recess edge 21a formed in a shape corresponding to the outer peripheral edge of each push button. The recess peripheral surface 21b faces the peripheral surface of each push button, and the recess 21 A bottom surface 21c is formed.

The recessed peripheral surface 21b has a circumferential width W4 larger than the circumferential width W1 of the engaging portion 16 and an arc-shaped concave portion 22a facing the engaging portion on the outer peripheral side of the concaved peripheral surface position. Is formed. The thin portion 22 is formed such that the edge 22b of the edge is substantially flush with the recess bottom surface 21c.

Further, a light guide section 23 for guiding light from a light source by a light emitting element 51 to be described later to the display section 11a and shielding the outside of the display section so that the light from the light source is not scattered is provided on the concave bottom face 21c. And the operating rod 11
A through-hole 24 is formed to insert b.

Then, the engaging portion 16 is provided on the concave bottom surface 21c.
The engagement opening 25 is formed at a position facing the thin portion 22 so as to face the thin portion 22 with a peripheral width W5 slightly larger than the peripheral width W1 of the engaging portion. The engaged opening 25 has an opening having substantially the same width as the thickness of the hinge 12e and engages the engaging portion 16, and the circumferential width W5 of the engaged opening 25 is greater than the circumferential width W2. It is formed small.

Further, a sliding contact surface 26a formed on the same surface as the side surface of the engaged opening 25 and a sliding surface 26b formed inclined with respect to the sliding contact surface are formed on the concave bottom surface 21c. ,
The engaging portion 16 is guided to the engaged opening 25 and the extension surface 1
A pair of ribs 26 slidingly contacting 2k and 14k are formed upright in an L-shape.

Next, the mounting state of the composite button to the mounted portion will be described with reference to FIG.

FIGS. 5A and 5B are explanatory views illustrating a state in which the composite button is attached to the mounted portion with reference to respective cross-sectional views. FIG. 5A is a state of the engaging portion when the composite button is guided to the mounted portion. FIG. 5B is an explanatory diagram showing the state of the engaging portion and the rib when the composite button is guided to the bottom of the recess.
c is an explanatory view showing the state of the engaging portion and the thin portion when the composite button is engaged with the peripheral surface of the recess.

In FIG. 5, reference numeral 50 denotes a printed circuit board provided with a light emitting element 51 and a switch 52 having a switch operator 52a.

In FIG. 5A, when the composite button 10 is inserted into the recess 21, the engaging portion 16 engages the inclined surface 12 f with the recess edge 2.
1a while sliding on the hinge 1a.
2e is elastically deformed inward of the recess 21. That is, since a plurality of engaging portions 16 are formed at positions connecting the push button and the adjacent push button (in this embodiment, the connecting portions of the four push buttons are formed in four directions oblique to the composite button). , Composite button 10
The hinge 12e is bent inward of the recess 21 with the insertion of the hinge 12e into the recess 21.

Then, the composite button 10 is moved to the concave bottom 2 in the concave.
1c, the engaging portion 16 is positioned at its tip 12
g slides while contacting the sliding surface 26b of the rib 26.
Then, by this sliding, the engaging portion 16 is moved to the hinge 12e.
Is restored to the original state.

Thereafter, the extending surface 12k of the engaging portion 16 slides on the sliding contact surface 26a of the rib 26, and the inclined surface 12f contacts the concave peripheral surface 21b.

Then, as shown in FIG. 5B, the engaging portion 16 is guided to the engaged opening 25 as the composite button 10 is further inserted into the recess 21. At this time, the engaging portion 16 is inserted into the engaged opening 25 while bending the thin portion 22 into the arc-shaped concave portion 22a by the inclined surface 12f. That is, the thin portion 22 allows the thin portion 22 to be inserted into the engaged opening 25 while resisting the sliding bias by the engaging portion 16.

As shown in FIG. 5C, when the composite button 10 is engaged with the concave peripheral surface 21b, the engaging portion 16 is located at the position where the locking step 12h reaches the edge 22b of the thin portion 22. so,
The contact with the thin portion 22 by the inclined surface 12f is released. Therefore, the bending of the thin portion 22 into the arcuate concave portion 22a is restored to the original state, and the engaging portion 16 is engaged with the edge 22b of the thin portion 22 to engage with the thin portion.

The position where the locking step 12h is substantially flush with the edge 22b is determined by the step 12j formed on the hinge 12e.
Is also a position where it contacts the concave bottom surface 21c. When the push button is pressed while the composite button 10 is attached to the mounting portion, the contact portion between the step portion 12j and the concave bottom surface 21c acts as a fulcrum when the push button is pressed.

Next, the molding die for molding the composite button, in particular, the molding die for the hinge and the engaging portion is shown in FIG.
This will be described with reference to FIG.

FIG. 6A is a rear view of the composite button as viewed from the rear side, and FIG. 6C is a cross-sectional view of the mold along line CC, FIG. 6D is a cross-sectional view of the mold along line C′-C ′, and FIG. 6E is a cross-sectional view of the mold along line C ″ -C ″.

FIG. 7A is a perspective view of the composite button as viewed from the side, and FIG. 7B is a partially enlarged view of FIG. FIG. 7C is a sectional view of the mold along the line DD, and FIG. 7D is a sectional view of the mold along the line D′-D ′.

In each of the sectional views, a portion indicated by oblique lines going up to the left is a fixed mold, and a portion indicated by oblique lines to the upper right is a moving mold.

The button bodies 11d, 12d and 13 of the composite button 10
d and 14d are molded by filling a molding space 150 formed by the fixed mold 100 and the movable mold 110 with a thermoplastic resin, and a parting surface (projection) where the fixed mold 100 and the movable mold 110 abut against each other. The mating surface 130 is provided on the same surface as the outer peripheral surface 10a of each button body (FIG. 6).
c).

For example, the hinge 14 e is formed in the molding space 1 formed by the fixed mold 100 and the movable mold 110.
The parting surface 131 is provided on the same surface as the locking step 12h (FIGS. 6d and 7c).

The engaging portion 16 is molded by a continuous molding space 160 formed by the movable mold 110 (FIG. 6).
d, FIG. 7d).

Further, as shown in FIGS. 6E and 7D, the engagement claw continuation portion 15 is provided between the engagement claw on the hinge surface side (for example, between the engagement claw 12i and the engagement claw 14i). The cross section is recessed in a substantially U-shape, and the recess is formed by the movable mold 110.

The space formed between the adjacent hinges (ie, the space W3 formed between the hinge 12e and the adjacent hinge 14e in FIG. 2) is, as shown in FIGS. The mold 110 is formed on the same peripheral surface as the outer peripheral surface of the push button main body, with a draft angle (angle d) slightly outward, and formed by abutting against the fixed mold 100.

As described above, in the composite button, the space between the adjacent hinges is formed by the butting of the fixed mold and the movable mold, and the engaging claw continuous portion is molded by the continuous molding space formed by the movable mold. You.

In other words, the continuous-type composite button of the embodiment includes:
Unlike the conventional example, an annular fixing portion that connects the hinge and the extension end of the adjacent hinge and has a space between the hinge and the button body is not formed.

For this reason, the molding die for molding the continuous-type composite button does not need to be equipped with a conventional slide die, and can be composed of only a normal fixed die and a movable die.

[0085]

As described above, the present invention relates to a composite button comprising a plurality of push buttons 11, 12, 13, and 14 in a linked composite button in which the outer peripheral edges of a plurality of push buttons are connected and arranged in a disk shape. And thin hinges 11e, 12e, 13e, 14e extending from the vicinity of the periphery of the adjacent push button, and engaging claws 11i, 12i, 13i, 14 at the extending ends of the hinges.
i is formed, and the engaging claw and the engaging portion 16 composed of the engaging claw continuity portion 15 connecting the adjacent engaging claw are integrally formed, so that the composite button can be inserted into the mounted portion 20. In connection with this, when molding the linked composite button 10 having a configuration in which the engaging portion 16 is engaged with the engaged opening 25 formed in the mounted portion by the elastic action of the hinge, the fixed mold 100 is used. A molding space 150 for molding the composite button portion formed by the movable mold 110 and a continuous molding space 160 for molding the engaging portion 16 are filled with a thermoplastic resin and injection-molded. It was formed by the moving mold 110.

For this reason, a linked composite button is formed without forming a conventional annular fixing portion for connecting a plurality of push buttons and without using a slide die for forming a space between the button and the button body. Thus, the molding die for molding the button holder as a separate component can be eliminated, and the die cost required for molding the linked composite button can be reduced.

Further, since a plurality of composite buttons can be simultaneously molded with the same mold, the unit price of the composite button can be reduced, which is useful.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a linked composite button according to the present invention, FIG. 1a is a front view seen from the direction in which the composite button is operated, FIG. 1b is a perspective view seen from the upper side of the composite button, and FIG. FIG. 1d is a perspective view of the composite button viewed from the lateral side, and FIG. 1d is a rear view of the composite button viewed from the rear side.

2 is an enlarged view of an engaging portion of the composite button shown in FIG. 1; FIG. 2a is an enlarged view of the engaging portion shown in FIGS. 1b and 1c; FIG. 2b is an engaging portion shown in FIG. 1d; FIG.

3A and 3B are explanatory views illustrating a mounting structure of a composite button and a mounted portion according to the present invention. FIG. 3A is a front view as viewed from a direction in which the composite button is operated, and FIG. 3B is a line AA in FIG. 3A. FIG.

4A and 4B are explanatory views illustrating a mounting structure of a composite button and a mounted portion according to the present invention. FIG. 4A is a front view of the mounted portion viewed from a mounting direction of the composite button, and FIG. It is a side sectional view in the -B line.

FIGS. 5A and 5B are explanatory views illustrating a state in which the composite button according to the present invention is mounted on a mounted portion with reference to respective cross-sectional views. FIG. 5A is an engagement portion when the composite button is guided to the mounted portion. FIG. 5B is an explanatory diagram showing the state of the engaging portion and the rib when the composite button is guided to the bottom of the recess.
c is an explanatory view showing the state of the engaging portion and the thin portion when the composite button is engaged with the peripheral surface of the recess.

6 is an explanatory view illustrating a molding die for forming a hinge and an engagement portion of the composite button according to the present invention, FIG. 6a is a rear view of the composite button as viewed from the back side, and FIG. 6b is a partially enlarged view thereof. FIG. 6c is a cross-sectional view of the mold along the line CC, and FIG.
FIG. 6E is a sectional view of the mold along the line C ′ and FIG. 6E is a sectional view of the mold along the line C ″ -C ″.

7A and 7B are explanatory views illustrating a molding die for molding a hinge and an engagement portion of the composite button according to the present invention. FIG. 7A is a perspective view of the composite button as viewed from a lateral side, and FIG. Figure,
FIG. 7C is a cross-sectional view of the mold along the line DD, and FIG.
It is a metal mold | die sectional drawing in the D 'line.

8A and 8B show a conventional combination type composite button, FIG. 8A is a front view of the composite button viewed from a direction in which the composite button is operated, FIG. 8B is a perspective view of the composite button seen from the upper side, and FIG. FIG. 8D is a perspective view of the button viewed from the lateral side and FIG. 8D is a rear view of the composite button viewed from the rear side.

9A and 9B are explanatory views illustrating a mounting structure of a conventional composite button and a button holder. FIG. 9A is a front view as viewed from a direction in which the composite button is operated, and FIG. 9B is a side taken along line EE in FIG. 9A. It is sectional drawing.

10A and 10B are explanatory views illustrating a mounting structure of a conventional composite button and a button holder. FIG. 10A is a front view of the button holder viewed from the mounting direction of the composite button, and FIG. 10B is FF of FIG. 10A.
It is a sectional side view in a line.

11A and 11B are explanatory views illustrating a state in which a conventional composite button is attached to a button holder, FIG. 11A is an explanatory view illustrating a state in which an engaging portion is guided by an opening of the attaching portion, and FIG. FIG. 11c is an explanatory view showing a state in which the part is guided to the engaged opening of the button holder, and FIG. 11c is an explanatory view showing a state in which the engaging part is engaged in the engaged opening.

12A and 12B are explanatory views illustrating a molding die for molding a hinge, an annular fixing portion, and an engaging portion of a conventional composite button, FIG. 12A is a rear view of the composite button as viewed from the back side, and FIG. FIG. 12c is a partially enlarged view of the mold along line GG,
FIG. 12D is a sectional view of the mold along line G′-G ′ and FIG.
2e is a sectional view of the mold along the line G "-G".

13A and 13B are explanatory views illustrating a molding die for molding a hinge, an annular fixing portion, and an engaging portion of a conventional composite button. FIG. 13A is a perspective view of the composite button as viewed from a lateral side, and FIG. FIG. 13c is a sectional view of the mold taken along line HH, FIG. 13d is a sectional view of the mold taken along line H′-H ′, and FIG. 13e is a sectional view of the mold taken along line H ″ -H ″.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 linked composite button 11 push button (recording / playback button) 11e hinge 11i engaging claw 12 push button (fast-forward button) 12e hinge 12i engaging claw 13 push button (rewind button) 13e hinge 13i engaging claw 14 push button (stop button) 14e Hinge 14i Engagement claw 15 Engagement claw continuation part 16 Engagement part 20 Mounted part 25 Engagement opening 100 Fixed mold 110 Moving mold 150 Molding space 160 Continuous molding space

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI // B29L 19:00 B29L 19:00 31:34 31:34

Claims (3)

(57) [Claims] 1. A linked composite button in which the outer peripheral edges of a plurality of push buttons are connected and arranged in a disk shape, wherein the linked composite button is a composite button portion including a plurality of push buttons;
A thin hinge extending from the vicinity of the periphery of the adjacent push button, and an engaging portion formed with an engaging claw at the extending end thereof and an engaging claw continuous portion connecting the adjacent engaging claw; Are integrally formed, and the engaging portion is engaged with the engaged opening formed in the attached portion by the elastic action of the hinge with the insertion of the linked composite button into the attached portion. In molding the linked composite button having the above configuration, a thermoplastic resin is filled into a molding space for molding the composite button portion formed by a fixed mold and a movable mold and a continuous molding space for molding the engagement portion. Wherein the continuous molding space is formed by a movable mold. 2. A space formed between adjacent hinges,
2. The method according to claim 1, wherein the push button is formed by abutting the movable mold against a fixed mold having a draft slightly outside the outer peripheral edge of the push button. 3. The engaging claw continuous portion has a hinge surface side recessed in a substantially U-shape between adjacent engaging claws on a hinge surface side, and the recessed portion is formed by a movable mold. The method of molding a linked composite button according to claim 1.