JPH0452909Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to improvements in knob devices for electroacoustic equipment such as cassette decks and amplifiers.

[Prior Art] In recent years, knob devices have been widely used which include a knob grille in which a plurality of knob bases are arranged in series, and a knob cap of the same shape and color is attached to each of the knob bases.

The knob device can integrally mold a plurality of knob bases at the same time as molding the knob grille.

Furthermore, since the knob caps have the same shape and color, they can be molded using the same mold, which has the advantage that the cost per knob cap can be lowered.

Furthermore, from a design standpoint, it has the advantage of providing a uniform aesthetic feel.

[Problems to be solved by the invention] As mentioned above, in a knob device in which knobs of the same shape and color are arranged, usually after the knob grill is attached to the chassis, front grill, etc. of the device,
The knob cap was attached to the knob base by fitting or using adhesive.

However, the function display characters (``PHONO'', ``TUNER'') are generally placed on the front of the knob cap.
etc.) is printed or engraved, and the knob cap with the relevant function indication is attached to the knob base that operates the switches exhibiting the above function.As mentioned above, if the knob cap is of the same shape and color As a result, there were many errors in attaching the knob caps, that is, attaching the knob caps to the knob bases that operated switches that performed functions different from those displayed on the knob caps.

In order to prevent this, a small protrusion is formed on one side of the joint surface of the knob base and the knob cap, and a recess is formed on the other side, with the positions of the two being different. Attempts have been made to prevent operational errors by completely attaching the knob base only to a functional knob base.

However, when forming the small protrusions or recesses, the mold becomes complicated, and since extrusion molding is used, it is impossible to integrally mold the small protrusions or recesses.

In particular, for aluminum extrusion molded products, after extrusion molding as a rail member with the desired cross-sectional shape,
After surface treatment such as alumite processing, function display characters are silk-printed and the knob caps are separated into units, making it possible to easily and inexpensively provide knob caps. Since the aforementioned small protrusions or recesses cannot be integrally formed by molding, there is a problem in that the aforementioned engaging means cannot be employed.

[Structure of the invention] This invention forms protrusions at different positions on each knob base on the abutment surface of the knob cap of the knob base integrally formed with the knob grille by molding, and also forms the protrusions by extrusion molding. A knob device in which a notch or a through hole that engages with the protrusion is formed in a portion of the knob cap corresponding to the protrusion,
It is constructed so that only the knob base that operates the switches exhibiting the display function of the knob cap can be attached.

[Example] In FIG. 1, 10 is a knob base 11a,
12a, 13a, 14a are knob grilles integrally formed by molding, 11b, 12
b, 13b, and 14b are knob caps that are attached to the knob bases 11a, 12a, 13a, and 14a, respectively, and the function display characters "VIDEO/
"AUX", "CD", "PHONO", and "TUNER" are attached by silk printing.

Although not shown, switches are arranged behind each of the knob bases, and the switches are operated by pressing the knob bases.

Then, as shown in Fig. 2, the knob base 11
A small protrusion 111a is integrally molded near the upper end of the knob cap 11b, and a notch 111b that engages with the small protrusion 111a is formed at the upper edge of the knob cap 11b.

The small protrusions 111a, 121a, 131a,
141a and cutouts 111b, 121b, 131
b, 141b are formed at the combination of each knob base and knob cap, 11a, 11b, 12
They are different between a and 12b, 13a and 13b, and 14a and 14b.

That is, as shown in FIG. 1, the positions of each small protrusion and notch are different in the horizontal direction.

As shown in FIG. 3, the knob cap having the above-mentioned shape is made by cutting an extrusion-molded rail member 31 with a substantially U-shaped cross section with a saw or the like, leaving the part indicated by the dotted line, that is, a part of the upper end. It is anodized and dyed, then the function indication letters are silk-printed all at once.

Next, as shown by the dashed line, the notch 111
Part 3 that becomes b, 121b, 131b, 141b
By punching out the upper end portions 11, 312, 313, 314 and the cut portions at the same time using a press, knob caps 11b, 12b, 13b, 14b of desired length as shown in FIG. 1 can be obtained at the same time.

[Effects of the invention] The knob device of this invention described above has the following effects:
Only combinations of knob bases and knob caps in which the small protrusion of the knob base and the notch of the knob cap match the formation positions will be completely joined, so incorrect combinations of knob bases and knob caps can be easily discovered and work can be done easily. It becomes possible to prevent mistakes.

In addition, according to this invention, a knob cap made by extrusion molding of metal such as aluminum can be applied, and as mentioned above, the extrusion molded product has an excellent design.
Since it is suitable for mass production, it has excellent practical effects such as being able to provide a low-cost knob device.

Although it is desirable that the small protrusion and notch be shielded by the front plate placed on the front surface of the knob grille as in the embodiment, a small hole is drilled in the knob cap and the tip of the small protrusion is This may be used for design purposes by exposing the portion on the front surface of the knob cap.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a knob device according to an embodiment of this invention, Fig. 2 is an exploded perspective view of a knob according to an embodiment of this invention, and Fig. 3 is a perspective view showing the manufacturing process of a knob according to an embodiment of this invention. It is. 11a to 14a are knob bases, 10 is a knob grill, 111a to 141a are small protrusions, 111
b to 141b are notches, and 11b to 14b are knob caps.

Claims (1)

[Scope of utility model registration request] A knob grill 10 in which a plurality of knob bases 11a to 14a are arranged in series, and each knob base 11a to
Small protrusions 111a to 14 integrally molded on 14a
1a, and a notch 111 which is an extrusion molded product and is attached to each of the knob bases 11a to 14a and engages with the small protrusion 111a to 141a.
A plurality of knob caps 1 forming b to 141b
1b to 14b, and the small protrusions 111a to 111a.
141a and the notches 111b to 141b are arranged at different positions in each combination of the knob bases 11a to 14a and the knob caps 11b to 14b.