JPH09290432A - Molding of connective composite button - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold a connective button without using a slide molding die by packing a thermoplastic resin into a continuous molding space for molding a molding space and an engaging part for the molding of a composite button to be formed with a fixed and a moving molding die, and molding the compositive button, and further forming the continuous molding space with the moving molding die. SOLUTION: The main body of a composite button 10 is molded by packing a thermoplastic resin into a space 150 formed by a fixed and a moving molding die 100, 110. Further, a parting face 130 is provided flush unit the outer peripheral edge face 10a of each of the button main body. In addition, a hinge 14e, for example, has its parting face 131 formed flush with an engaging stepped part 12h is formed. An engaging part 16 is molded by a continuous molding space 160 which is formed with the moving molding die 110. An engaging claw connection part 15 is formed with the moving molding die 110 in such a way that the hinding face side has a cross section which is U-shaped as a depression between the hinging face side and an engaging claw. The space formed between adjacent hinges is butt formed with the fixed molding die 100 in such a manner that the moving molding die 110 has a draft (angle) on the same peripheral face as the button main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding an interconnecting type composite button, and more particularly to a connecting part for connecting adjacent push buttons via a hinge and an interconnecting type in which the hinges are formed by a fixed die and a moving die. 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 relating to recording / reproducing of a magnetic tape are arranged on a front panel or a remote control operating portion of a home electronic device such as a magnetic recording / reproducing device. Coupling-type composite buttons arranged in a row and connected to each other or coupling-type composite buttons arranged in a disc shape are widely used.

Usually, these linked compound buttons have a structure in which a button holder is interposed in a mounting portion formed on a front panel or the like.

Further, in the combined type composite button, after the engaging portion formed in the composite button is attached to the engaging hole formed in the button holder, the fitting portion (the fitting portion formed in the attaching portion of the button holder is Or screw part).

Further, conventionally, when attaching a combined type composite button to a mounting portion, the composite button is prepared by attaching a button holder to the back surface (or rear side) of the mounting portion and from the front side (or front side) of the mounting portion. It is selected according to the assembly process of the front panel, that is, the composite button is attached to the button holder in advance and the composite button is attached to the back surface (or rear) of the attachment portion.

[0006] As described above, the conventional combination type composite button (hereinafter,
Abbreviated as composite button. ) And its molding die.

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 seen from the direction of operating the composite button, FIG. 8b is a perspective view seen from the upper side of the composite button, and FIG. 8c is a side view of the composite button. FIG. 8d is a perspective view seen from the side and FIG. 8d is a back view seen from the back side of the composite button.

The compound 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, etc., are arranged in a divided manner with a pressing surface.

Each push button has an operation display 61a, 62 of the device controlled by the push operation of the push button.
a and 63a are appropriately provided in an identification form meaning a control function of the device. (FIG. 8a) Further, on the back side of the push button, a switch operator 52a described later is provided.
The operating rods 61b, 62b, 63b, 64b for transmitting the pressing operation by the fingers to the switch operating element extend at a position opposed to. Then, in the vicinity of the operating rod, contact rods 61c, 62 for preventing wobble or the like caused by the pressing operation of the push button.
c, 63c, and 64c are formed in pairs. (FIG. 8d) In addition, the push buttons have button bodies 61d, 62d, 63 on the circumferential surface extending from the outer peripheral edge of each push button and substantially orthogonal to the push surface.
d and 64d are formed.

Then, for example, the button body 62d has hinges 61e and 64e to which a hinge 62e, which extends from the inner edge of the button body with a thin wall and has a step, is adjacent to the outer edge of the button body.
Two spaces are formed in the vicinity of the button bodies 61d and 64d with a space 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 hinges at a position separated from each button body by a certain distance and serve as a mounting base for the composite button.

Then, 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 ends. (FIG. 8c) The engaging portion 66 has an end portion 66a, a locking step portion 66b, and an inclined surface 66c, and constitutes an engaging claw. (FIG. 8b) Next, the mounting structure of the composite button and the button holder is shown in FIG. 9 and FIG.
0 will be described.

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

In FIG. 9, the composite button 60 has a plurality of push buttons connected to adjacent push buttons by an annular fixing portion 65, and is integrally formed by a molding die.

In FIG. 9b, the ring-shaped fixing portion 6 of the composite button 60 is formed through the operating rod 61b formed on the push button 61, the contact rod 64c formed on the push button 64, and the hinge 64e.
5 and an engaging 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 integrally formed by projecting screw parts 71 at a plurality of places of the button holder.

A rib 72 having an inclined surface 72a is erected on the screw portion 71 in the protruding direction of the screw portion, and a screw hole 71a for attaching the screw portion to the mounting portion 1 is formed.

Further, the button holder 70 shown in FIG.
A display unit 61 displays light from a light source by a light emitting element 51 described later.
The light guide portion 73 which is guided to a and shields the light from the light source to the outside of the display portion is formed in a deformed tubular shape, and
A through hole 74 is formed through which the operating rod 61b is inserted.

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

Next, how the composite button is attached to the button holder will be described with reference to FIG.

FIG. 11 is an explanatory view for explaining a state in which the composite button is attached to the button holder by respective sectional views, and FIG. 11a is an explanatory view showing a state in which the engaging portion is guided to the opening of the attaching portion, FIG. 11b is an explanatory view showing a state where the engaging portion is guided to the engaged opening of the button holder, and FIG. 11c is an explanatory diagram showing a state where the engaging portion is engaged with the engaged opening.

In FIG. 11, reference numeral 50 is a printed circuit board on which a light emitting element 51 and a switch 52 having a switch operator 52a are arranged.

In FIG. 11a, the button holder 70 is attached to the back side of the mounting portion 1 in advance by screwing the screw portion 71 of the button holder. Then, the composite button 60 is inserted from the front side of the attachment portion 1 and attached to 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 is inserted.
Slides while contacting the inclined surface 66c with the opening edge portion 2a, and the sliding causes the hinge 64e and the engaging portion 66 to be bent inward of the opening 2 and elastically deformed together with the annular fixing portion 65.

As shown in FIG. 11b, when the composite button 60 is guided to the engaged opening 75 of the button holder 70, the engaging portion 6
6 slides while the inclined surface 66c abuts the edge portion 75a of the engaged opening 75 as the engaging portion inserts into the engaged opening 75, and the slanted surface slides. Joint part 1
Bend 6 further.

The annular fixing portion 65 abuts on the rib 72 and slides on the inclined surface 72a, so that the engaging portion 66 is formed.
Is inserted into the engaged opening 75.

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

Then, as shown in FIG. 11C, when the composite button 60 engages with the engaged opening 75 of the button holder 70, the rear surface of the button holder 70 reaches the rear surface 75b of the engaged opening 75. The engaging portion 66 is locked by the restoring force of the engaging portion 66, and the engaging portion engages with the button holder 70.

Next, the molding die for molding the composite button, particularly the molding die for the hinge, the annular fixing portion and the engaging portion will be described with reference to FIGS. 12 and 13.

FIG. 12a is a rear view of the composite button as seen from the back side, and a partially enlarged view thereof is shown in FIG. 12b. And FIG.
2c is a mold cross-sectional view taken along line G-G, and FIG. 12d is G'-.
The mold cross section along line G'and FIG. 12e are G "-G".
It is a die sectional view in a line.

FIG. 13a is a perspective view of the composite button as seen from the lateral side, and a partially enlarged view thereof is shown in FIG. 13b. 13c is a sectional view of the mold taken along line HH, FIG. 13d.
Is a mold cross-sectional view taken along the line H′-H ′, and FIG. 13e is a mold cross-sectional view taken along the line H ″ -H ″.

In each of the sectional views, the portion shown by the upper left diagonal line is a fixed mold, the portion shown by the upper right diagonal line is a moving mold, and the cross hatched portion is a slide mold.

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, and the fixed mold 101 is slid onto the slide mold 12.
The parting surface (butting surface) 130 with which 1 slides is provided on the same surface as the outer peripheral edge surface 60a of each button body (FIG. 12c).

Then, for example, the hinge 64e and the annular fixing portion 65 are molded by the continuous molding space 161 formed by the moving 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, 6 adjacent to the hinge 62e in FIG. 8c).
The space W6) formed between the moving mold 111 and
Is formed by a slide die 121 that slides radially with respect to the surface of the fixed die 101 in a direction orthogonal to the moving direction of the.

The engaging portion 66 is molded by the 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 and 12e, FIG. 13d, 13e).

As described above, in the linked type composite button of the conventional example, a plurality of push buttons are connected via the hinge at a position apart from the button body by a predetermined distance so that the push buttons do not interfere with the adjacent push buttons. It is configured by an annular fixing portion which serves as a mounting base of a combination type composite button.

The molding die that forms a space between the annular fixing portion and the button body includes, in addition to the normal fixed die and the moving die, a radial shape in a direction orthogonal to the moving direction of the moving die. A slide mold that slides to is installed. That is, the slide mold is provided radially around the entire circumference of the linked composite button.

For this reason, the unit cost of the molded resin product is high because the mold structure is large and complicated and the cost of the mold is high, and the number of pieces taken from the same mold is small. There was a drawback that

Therefore, it has been a problem to reduce the die cost for the molding process and the unit price of the molded product in the connection type 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 it is a continuous type composite that can be molded only by a fixed mold and a movable mold without disposing a slide mold. A method of molding a button is provided.

[0042]

In order to achieve the above object, according to the present invention, an engaging claw continuous portion formed between adjacent push buttons is provided in a substantially U-shaped recess between the adjacent engaging claws. Then, the recessed portion is formed by a moving die.

Further, the space between the hinges formed by the engagement claw continuous portion is formed by the butting in which the movable mold collides with the fixed mold having a draft outside the outer peripheral edge of the push button.

[0044]

BEST MODE FOR CARRYING OUT THE INVENTION An interconnecting type composite button (hereinafter abbreviated as composite button) of an embodiment according to the present invention and its molding die will be described below with reference to the drawings.

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

FIG. 1 shows a composite button of an embodiment, FIG. 1a is a front view seen from the direction of operating the composite button, FIG. 1b is a perspective view seen from the upper side of the composite button, and FIG. 1c is a side view of the composite button. FIG. 1d is a perspective view seen from the side and FIG. 1d is a back view seen from the back side of the composite button.

FIG. 2 is an enlarged view of the engaging portion 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. It is a figure.

The composite button 10 has a circular surface on which a plurality of push buttons, for example, a record / playback button 11, a fast-forward button 12, a rewind button 13, a stop button 14, etc., are arranged in a divided manner with a pressing surface.

On the respective pressing surfaces, the operation displays 11a, 12a, 1 of the device controlled by the pressing operation are displayed.
3a is appropriately provided in an identification form that means a control function of the device. (FIG. 1a) Further, on the back side of the push button, a switch operator 52a described later is provided.
The operating rods 11b, 12b, 13b, 14b for transmitting the pressing operation by the fingers to the switch operating element extend at a position opposed to. Abutting rods 11c, 12c, 13 for abutting a bottom surface 21c of a recess, which will be described later, to prevent the push button from wobbling or the like due to a pressing operation at a position near the operating rod.
c and 14c are formed in pairs. (FIG. 1d) In addition, the push buttons have button bodies 11d, 12d, 13 on the circumferential surface extending from the outer peripheral edge of each push button and substantially orthogonal to the push surface.
d and 14d are formed.

Then, for example, in the button body 12d, a plate-like hinge 1 which is thinly extended from the outer edge of the button body, has a step on the inner edge of the button body, and has an extending surface 12k described later is formed.
Two buttons 2e are formed near the button bodies 11d and 14d adjacent to each other. (FIGS. 1b and 1c) Further, the extending end of the hinge 12e has an inclined surface 12f, and the engaging claw 1 includes a tip portion 12g and a locking step portion 12h.
2i are formed respectively. (FIG. 1c) Then, as shown in FIG. 2a, the engaging claw 12i is formed with an engaging claw continuous portion 15 that connects the engaging claw and an adjacent engaging claw 14i. Engaging claws 12i and 14i
The engaging portion 16 is formed by and.

The peripheral width W1 of the engaging portion 16 is determined by the hinge 1
It is formed smaller than the circumferential width W2 between the hinge 2e and the adjacent hinge 14e. Due to this width difference, step portions 12j and 14j are formed, and the step portions form a fulcrum when the push button is pressed, which will be described later. A space W3 is formed between the hinge 12e and the adjacent hinge 14e.

The steps 12j and 14j correspond to the engaging portion 1
The locking step portion 12h formed in 6 has a slight step and is formed to be substantially flush with the same. Due to this slight step, the engagement portion 16 and the edge portion 22b of the thin portion 22 described later are easily engaged.

Further, as shown in FIG. 2b, the engaging claw continuous portion 15 has extension surfaces 12k and 1 of the hinges 12e and 14e.
A concave portion 15a having a U-shape 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. 3 and 4.

FIG. 3 shows a composite button, FIG. 3a is a front view seen from the direction of operating the composite button, and FIG. 3b is a side sectional view taken along the line AA of FIG. 3a. FIG. 4 shows the mounted part, and FIG.
FIG. 4a is a front view of the mounted portion viewed from the mounting direction of the composite button, and FIG. 4b is a side sectional view taken along the 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 engaging portions, and are integrally formed by a molding die.

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

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

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

In addition, the recess peripheral surface 21b has a peripheral width W4 larger than the peripheral width W1 of the engaging portion 16, and the arcuate concave portion 22a is formed on the outer peripheral side of the peripheral surface of the recess facing the engaging portion. The thin portion 22 having the is formed. Then, the thin portion 22 is formed such that the edge portion 22b of the edge thereof is substantially flush with the recess bottom surface 21c.

Further, on the bottom surface 21c of the recess, a light guide portion 23 which guides the light from the light source by the light emitting element 51 described later to the display portion 11a and shields the light from the light source outside the display portion is deformed. And the operating rod 11
A through hole 24 through which b is inserted is formed.

The engaging portion 16 is formed on the bottom surface 21c of the recess.
The engaged opening 25 is formed at a position facing the thin portion 22 with a circumferential width W5 slightly larger than the circumferential 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 to engage the engaging portion 16, and the circumferential width W5 of the engaged opening 25 is smaller than the circumferential width W2. Formed small.

Further, on the bottom surface 21c of the recess, a sliding contact surface 26a formed on the same surface as the side surface of the engaged opening 25, and a sliding surface 26b inclined with respect to the sliding contact surface are formed. ,
The engaging portion 16 is guided to the engaged opening 25 and the extending surface 1
A pair of ribs 26 that slidably contact 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.

FIG. 5 is an explanatory view for explaining a state when the composite button is attached to the mounted portion by each sectional view, and FIG. 5a is a state of the engaging portion when the composite button is guided to the mounted portion. 5B is an explanatory view showing the state of the engaging portion and the rib when the composite button is guided to the bottom surface of the recess, FIG.
FIG. 7C is an explanatory view showing a state of the engagement portion and the thin portion when the composite button is engaged with the peripheral surface of the recess.

In FIG. 5, reference numeral 50 is a printed circuit board on which a light emitting element 51 and a switch 52 including a switch operator 52a are arranged.

In FIG. 5a, when the composite button 10 is inserted into the recess 21, the engaging portion 16 has its inclined surface 12f formed in the recess edge portion 2.
Sliding while abutting on 1a, the hinge 1
2e is elastically deformed inward of the recess 21. That is, a plurality of engaging portions 16 are formed at positions where the push buttons are connected to adjacent push buttons (in the present 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 inwardly of the recess 21 as it is inserted into the recess 21.

Then, the composite button 10 is located in the recess bottom surface 2 of the recess.
When guided to 1c, the engaging portion 16 has its tip 12
The g is slid while contacting the sliding surface 26b of the rib 26.
Then, due to this sliding, the engaging portion 16 is hinged 12e.
The inward bending of the recess is restored to its original state.

Thereafter, the extending surface 12k of the engaging portion 16 makes sliding contact with the sliding contact surface 26a of the rib 26, and the inclined surface 12f makes contact with the recess 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 arcuate recess 22a by the inclined surface 12f. That is, the thin portion 22 allows insertion into the engaged opening 25 while resisting the sliding bias of the engaging portion 16.

Further, as shown in FIG. 5c, when the compound button 10 is engaged with the recess peripheral surface 21b, the engaging step 16 has a 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. For this reason, the thin portion 22 is restored to its original state of bending into the arcuate recess 22a, and the engaging portion 16 is engaged with the edge portion 22b of the thin portion 22 and engages with the thin portion.

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

Next, the molding die for molding the composite button, particularly 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 seen from the back side, and a partially enlarged view thereof is shown in FIG. 6b. 6c is a mold cross-sectional view taken along the line CC, FIG. 6d is a mold cross-sectional view taken along the line C'-C ', and FIG. 6e is a mold cross-sectional view taken along the line C "-C".

FIG. 7a is a perspective view of the composite button as seen from the side surface, and a partially enlarged view thereof is shown in FIG. 7b. And, FIG. 7c is a mold cross-sectional view taken along line D-D, and FIG. 7d is a mold cross-sectional view taken along line D′-D ′.

In each cross-sectional view, the portion shown by the upper left diagonal line is the fixed mold, and the portion shown by the upper right diagonal line is the moving mold.

The button bodies 11d, 12d, 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 collide with 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).

The hinge 14e is, for example, the molding space 1 formed by the fixed mold 100 and the movable mold 110.
50, and 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 the continuous molding space 160 formed by the moving mold 110 (FIG. 6).
d, FIG. 7d).

Further, as shown in FIGS. 6e and 7d, the engaging claw continuous portion 15 is located between the adjacent engaging claws on the hinge surface side (for example, between the engaging claw 12i and the engaging claw 14i). The cross section is recessed in a substantially U shape, and the recessed portion is formed by the moving die 110.

Further, the space formed between the adjacent hinges (that is, the space W3 formed between the hinge 12e and the adjacent hinge 14e in FIG. 2) is a movable metal as shown in FIGS. 6e and 7c. The mold 110 is formed by butting in contact with the fixed mold 100 with the same peripheral surface as the outer peripheral surface of the push button body and having a draft (angle d) slightly outside.

In this way, the composite button is formed between the adjacent hinges by the abutment 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. It

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

Therefore, the molding die for molding the continuous type composite button does not need to be provided with the slide die of the conventional example, and can be constituted by only the normal fixed die and the movable die.

[0085]

As described above, according to the present invention, in the combined type composite button in which the outer peripheral edges of the plurality of push buttons are connected and arranged in a disk shape, the composite button portion including the plurality of push buttons 11, 12, 13, 14 is provided. And thin hinges 11e, 12e, 13e, 14e extending from the vicinity of the periphery of adjacent push buttons, and engaging claws 11i, 12i, 13i, 14 at the extending ends of the hinges.
i is formed, and the engaging portion 16 including the engaging pawl continuous portion 15 that connects the engaging pawl and the adjacent engaging pawl is integrally formed, so that the composite button can be inserted into the mounted portion 20. Along with this, when molding the linked composite button 10 having a structure 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 molded. Further, the molding space 150 for molding the composite button portion formed by the moving mold 110 and the continuous molding space 160 for molding the engaging portion 16 are filled with a thermoplastic resin and injection-molded, and the continuous molding space 160 is formed. The movable die 110 is used for forming.

Therefore, the linked composite button is molded without forming a conventional annular fixing portion for connecting a plurality of push buttons and without using a slide mold for forming a space between the push button and the button body. As a result, 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.

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

[Brief description of drawings]

FIG. 1 shows an interconnecting type composite button according to the present invention, FIG. 1a is a front view seen from the direction of operating the compound button, FIG. 1b is a perspective view seen from the upper side of the compound button, and FIG. A perspective view of the composite button seen from the lateral side and FIG. 1d are rear views of the composite button seen from the back side.

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

3A and 3B are explanatory views for explaining a mounting structure of a composite button and a mounting portion according to the present invention, FIG. 3A is a front view seen from the direction of operating the composite button, and FIG. 3B is a line AA of FIG. 3A. It is a side sectional view in.

4A and 4B are explanatory views for explaining a mounting structure of a composite button and an attached portion according to the present invention, FIG. 4A is a front view of the attached portion as viewed from the attaching direction of the composite button, and FIG. 4B is B of FIG. 3A. It is a sectional side view in the line B.

FIG. 5 is an explanatory view for explaining a state when the composite button according to the present invention is attached to a mounted portion by respective cross-sectional views, and FIG. 5a is an engaging portion when the composite button is guided to the mounted portion. 5b is an explanatory view showing the state of the engaging portion and the rib when the composite button is guided to the bottom surface of the recess, and FIG.
FIG. 7C is an explanatory view showing a state of the engagement portion and the thin portion when the composite button is engaged with the peripheral surface of the recess.

6A and 6B are explanatory views illustrating a molding die for molding a hinge and an engaging portion of a 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. 6c is a sectional view of the mold taken along line C-C, and FIG. 6d is C'-.
The mold cross section along line C'and FIG. 6e are the mold cross sections along line C "-C".

7A and 7B are explanatory views for explaining a molding die for molding the hinge and the engaging portion of the composite button according to the present invention, FIG. 7A is a perspective view of the composite button as seen from a lateral side, and FIG. 7B is a partially enlarged view thereof. Figure,
7c is a sectional view of the mold taken along the line D-D, and FIG.
It is a metal mold sectional view in a D'line.

8A and 8B show a linked type composite button of a conventional example, FIG. 8A is a front view seen from the direction of operating the composite button, FIG. 8B is a perspective view seen from the upper side of the composite button, and FIG. FIG. 8d is a perspective view of the button viewed from the lateral side and FIG. 8d is a back view of the composite button viewed from the back side.

9A and 9B are explanatory views illustrating a mounting structure of a composite button and a button holder of a conventional example, FIG. 9a is a front view seen from the direction of operating the composite button, and FIG. 9b is a side taken along line EE of FIG. 9a. FIG.

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

FIG. 11 is an explanatory view for explaining a mounting state of a composite button of a conventional example to a button holder, FIG. 11a is an explanatory view showing a state in which an engaging portion is guided to an opening of the mounting portion, and FIG. 11b is an engaging state. 11c is an explanatory view showing a state in which the 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.

FIG. 12 is an explanatory view 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 seen from the back side, and FIG. A partially enlarged view, FIG. 12c is a mold cross-sectional view taken along line GG,
FIG. 12d is a mold cross-sectional view taken along line G′-G ′ and FIG.
2e is a mold cross-sectional view taken 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 seen from a lateral side, and FIG. A partially enlarged view thereof, FIG. 13c is a sectional view of the mold along line HH, FIG. 13d is a sectional view of the mold along line H′-H ′, and FIG. 13e is a sectional view of the mold along line H ″ -H ″.

[Explanation of symbols]

 10 Connection type composite button 11 Push button (record / play 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 continuous part 16 Engagement part 20 Attached part 25 Engaged opening 100 Fixed mold 110 Moving mold 150 Molding space 160 Continuous molding space

Claims (3)

[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 includes a composite button section including a plurality of push buttons.
A thin-walled hinge extending from each of the vicinity of the peripheral edge of the adjacent push button, and an engaging portion formed of an engaging pawl continuous portion connecting an engaging pawl with an engaging pawl formed at the extending end thereof. Are integrally formed with each other, so that when the connecting type composite button is inserted into the mounted portion, the engaging portion is engaged with the engaged opening formed in the mounted portion by the elastic action of the hinge. When molding the linked composite button having the above structure, a thermoplastic resin is filled in the molding space for molding the composite button part formed by the fixed mold and the movable mold and the continuous molding space for molding the engaging part. And the injection molding, and the continuous molding space is formed by a moving mold, which is a molding method of a combined type composite button. 2. The space formed between adjacent hinges is
2. The method for molding a combined type composite button according to claim 1, wherein the movable die is abutted against a fixed die having a draft slightly outside the outer peripheral edge of the push button. 3. The engagement claw continuous portion is formed such that the hinge surface side between adjacent engagement claws is recessed in a substantially U-shaped cross section, and the recessed part is formed by a moving die. The method for molding a linked composite button according to claim 1.