JPH0441533Y2 - - 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] A conventional knob is explained with reference to FIG. 4. In the figure, reference numeral 41 is a knob cap, which is made of synthetic resin molding or aluminum extrusion. Display characters 41a are printed or engraved.

Reference numeral 42 denotes a knob base that is coupled to the knob cap 41, and is often made of a synthetic resin molded product.

The knob base 42 is a knob shaft 4 into which a shaft tip (not shown) of a switch or the like is fitted.
It has 2a.

Among such knobs, from the viewpoint of design, knob devices in which knobs of the same shape and color are arranged are frequently used in recent years.

[Problems to be solved with the invention] As mentioned above, in the knobs used in knob devices in which knobs of the same shape and color are arranged, the positions of the knob base and the knob cap are often misaligned and adhesively joined during the knob assembly process. Something was happening.

The positional shift may occur due to an operator's error when assembling the knob, or may also occur due to a shift when the adhesive is drying.

In order to solve this drawback, for example, a small protrusion or a recess is formed on the front surface of the knob base, and a recess or small protrusion that engages with the small protrusion or recess is formed on the part of the knob cap opposite to the front surface, and the A structure has been proposed in which the knob cap and the knob base are prevented from shifting through engagement.

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, with aluminum extrusion molding, knob caps of the same shape can be provided in large quantities and at low cost by extruding into a rail shape with a U-shaped cross section and then cutting to a predetermined length, but as is well known, extrusion molding Since the small protrusions or recesses cannot be integrally formed, the above-mentioned engagement means cannot be employed.

Therefore, there have been problems in that the cost of the knob has increased and that the above-mentioned engagement means cannot be applied to aluminum knob caps.

[Structure of the device] This device forms a protrusion at one end of the knob base, which has an extended portion for locking the knob cap on the top and/or bottom surface of the knob base, and the position of the knob cap and the knob base is adjusted. This prevents slippage and allows the knobs to be inserted only when the knobs are arranged so that the mutual positional relationship of the knobs and the mutual positional relationship of the shafts of the switches match due to the protrusion.

[Example] In Fig. 1, 12a and 12b are knob caps, each with function display characters ``TAPE''.
-1" and "TAPE-2" are printed or engraved.

Reference numerals 11a and 11b are knob bases, and the knob base 11a is located at one end (left side in the figure) and the knob base 11b is located at the other end (right side in the figure) above and below the upper and lower surfaces of the knob base. Portions 141a, 141 extending in the direction
The protrusions 14a and 14b having a diameter b are arranged in series.

13a, 13b are knob shafts that are fitted with the tips of the shafts 21a, 21b of the switches 2a, 2b, and these knob shafts 13a, 1
The center axis of each knob 3b is 1/1/1 of the width of the gap between the knobs 1a, 1b and the adjacent knobs 1b, 1a plus the total width of the knobs 1a, 1b.
So that it is located inward (adjacent side) from position 2,
It is integrally molded with the knob bases 11a and 11b.

In the above configuration, when assembling the knob base 11b and the knob cap 12b, the knob cap 1
2b and the knob base 11b to join them together, the knob cap 12b is pressed to the right so that the rear end of the right side of the knob cap 12b is attached to the extended portion 141b of the protrusion 14b.
The knob 1b shown in FIG. 2 is completed.

Further, the knob 1a is assembled in the same manner except that the left-right relationship is reversed.

In order to attach the knobs 1a and 1b to the shafts 21a and 21b of the switches 2a and 2b fixed to the chassis 3 as shown in FIG. 1b protrusion 14a,
When the knobs 14b are arranged so that they do not face each other, that is, are arranged on the outside (the protrusion 14a is on the left side, and the protrusion 14b is on the right side), the knobs 1a and 1b are matched with the shaft axis spacing of the knob shafts 13a and 13b, and the knobs are The distance between 1a and 1b is narrower than the outward width of the protrusions 14a and 14b.

[Operation of the invention] According to the above structure, when assembling the knobs 1a, 1b, the knob caps 12a, 12b are connected to the protrusions 14a, 14b of the knob bases 11a, 11b.
By engaging with the extended portions 141a, 141b, it is possible to prevent the two from being misaligned.

In addition, when the knobs are arranged in a predetermined manner, that is, the knob 1a is inserted into the shaft 21a so that the protrusion 14a is located on the left, and the knob 1b is inserted into the shaft 21b so that the protrusion 14b is located on the right. For example, when the knobs 1a and 1b are placed in opposite positions, that is, the protrusion 14a is placed on the right side and the protrusion 14b is placed on the left side, the shaft spacing between the knob shafts 13a and 13b is set to the width of the protrusions 14a and 14b. It spreads by the corresponding amount, making it impossible to insert one of the knobs,
If one knob is reversed, knob shaft 1
The distance between the shafts 3a and 13b increases by an amount corresponding to the width of the protrusion, and one of the knobs cannot be inserted.

Further, from a design point of view, it is desirable that the protrusions 14a and 14b be shielded by the front plate 4 as shown in FIG.

Note that even if the extended portion of the protrusion is configured to protrude from the upper surface or lower surface of the knob base, the same effect can be obtained.

[Effects of the invention] According to the knob device of this invention described above,
It prevents misalignment of the knob cap and knob base when they are assembled, and has an excellent design.
An inexpensive extrusion-molded aluminum knob cap can be used, and since each knob can be inserted only when each knob is placed in a predetermined position, incorrect insertion can be prevented and the knob installation work can be simplified.

[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 a perspective view of a knob according to an embodiment of this invention, Fig. 3 is a front view of a knob device according to an embodiment of this invention, and Fig. 4 is a conventional one. FIG. 3 is an exploded perspective view of the knob. 11a, 11b are knob bases, 12a, 12
b is a knob cap, 141a, 141b are extended parts, 14a, 14b are protrusions, 1a, 1b
is a knob, 13a and 13b are knob shafts, 2
a and 2b are switches, and 21a and 21b are shafts.

Claims (1)

[Scope of Claim for Utility Model Registration] A set of two knobs arranged side by side, consisting of a knob cap and a knob base integrally molded with a knob shaft to which the knob caps are combined and into which the tip of the shaft of a switch type is fitted. In the knob device used, protrusions 14a and 14b having extended portions 141a and 141b that lock side ends of the knob caps 12a and 12b are formed at one side end of each of the knob bases 11a and 11b, respectively. On the back surface of each of the knob bases 11a and 11b, there is provided a central axis of each of the knob shafts 13a and 13b when the knobs 1a and 1b are arranged such that the protrusions 14a and 14b are located outward, respectively. The knob shaft 1 is positioned inward from 1/2 of the sum of the total width of each knob 1a, 1b and the width of the interval between the knobs 1a, 1b.
3a, 13b are formed, and the respective knob shafts 13 of the knobs 1a, 1b are arranged when the knobs 1a, 1b are arranged so that the protrusions 14a, 14b are located outward, respectively.
a, 13b and the switches 2a, 2
The shaft spacing between the respective shafts 21a and 21b of b is made to match, and the spacing between the knobs 1a and 1b is narrower than the outward width of the protrusions 14a and 14b of the knob bases 11a and 11b. A knob device that does this.