JPH0441535Y2 - - 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 will be explained with reference to FIG. Display characters 51a are printed or engraved.

Reference numeral 52 denotes a knob base that is coupled to the knob cap 51, and is often made of a synthetic resin molded product.

The knob base 52 is a knob shaft 5 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 by the invention] As described above, in the knob used in a knob device in which knobs of the same shape and color are arranged, errors in assembling the knob base and the knob cap often occur during the knob assembly process.

One of these is the frequent mistake of assembling the knob cap upside down.

In order to solve this problem, for example, a small protrusion or recess is formed on the front surface of the knob base 52 at a position offset from its center position, while the small protrusion or recess is formed on the portion of the knob cap 51 facing the front surface. If the knob cap 51 is not in a predetermined positional relationship with the knob base 52 due to the engagement, the knob cap 51 is not completely fitted to the knob base 52, thereby preventing upside-down assembly. .

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, aluminum extrusion molded products are extruded into rail strips with a U-shaped cross section, and then cut to a predetermined length, making it possible to provide knob caps of the same shape in large quantities at a low price. Since the aforementioned small protrusions or recesses cannot be integrally formed, the aforementioned 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 invention] This invention forms a protrusion on one side end of the knob base, and a ridge extending in the horizontal direction offset from the vertical center on the surface that comes into contact with the knob base during extrusion molding of the knob cap. Alternatively, the groove is integrally molded, and a groove or ridge that engages with the ridge or groove is formed on the knob base to prevent assembly errors between the knob cap and the knob base, and to prevent misalignment. In addition, the knobs can be inserted only when the knobs are arranged so that the mutual positional relationship of the knobs matches the mutual positional relationship of the shafts of the switch type.

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

Numerals 11a and 11b are knob bases, and protrusions 14a and 14b are connected to one end of the knob base 11a (left side in the figure) and to the end of the knob base 11b in the other direction (right side in the figure), respectively. It has been done.

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.

Further, 15a (not shown in the drawing) and 15b are ridges extending in the horizontal direction and deviated from the vertical center (downward in the drawing) on the inner surfaces of the knob caps 12a and 12b, that is, the surfaces that contact the knob bases, respectively. and the ridges 15a, 15b
can be formed simultaneously during extrusion molding.

On the other hand, 16a and 16b are the ridges 15, respectively.
the knob base 1 so as to engage with the knobs a and 15b.
These are grooves formed in 1a and 11b.

In the above configuration, when assembling the knob base 11b and the knob cap 12b, the knob cap 1
An adhesive is applied to the joining surfaces of the knob base 11b and the knob base 11b, and the two are joined together so that the ridges 15b and the grooves 16b engage with each other.

Further, the knob 1a is assembled in the same manner.

Then, as shown in FIG. 2, the knobs 1a and 1b are attached to the shafts 21a and 21b of the switches 2a and 2b fixed to the chassis 3. The protrusion 14a, 1
4b do not face each other, that is, as shown in the figure, they are on the outside (the protrusion 14a is on the left side, and the protrusion 14b is on the right side).
Knobs 1a and 1b when arranged so that they are located at
The spacing between the knobs 1a and 1b is made to match the spacing between the shaft axes of the knob shafts 13a and 13b, and the spacing between the knobs 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 knob, by assembling the knob so that the ridge of the knob cap and the groove of the knob base engage with each other, it is possible to prevent mistakes in attaching the two in the forward or reverse direction.

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, when the protrusion 14a is on the right side and the protrusion 14b is on the left side, the shaft spacing between the knob shafts 13a and 13b is the same as 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.

[Effects of the invention] According to the knob device of this invention described above,
It prevents assembly errors when assembling the knob cap and knob base, has an excellent design, allows the use of inexpensive extruded aluminum knob caps, and allows each knob to be inserted only when each knob is in the designated position. This makes it possible to prevent incorrect insertion and simplify the knob installation work.

[Other Embodiments] In another embodiment shown in FIG.
This is a knob in which an extension part 411b is formed on the upper and lower edges of the upper and lower edges of the knob base 11b to protrude from the upper and lower surfaces of the knob base 11b. It is possible to prevent the knob base 11b from shifting in the left-right direction, and furthermore, the function display characters "TAPE" attached to the knob cap 12b are displayed on the front surface of the protrusion 41b.
By attaching a symbol 42b (``2'') related to ``-2'' to the knob cap, it is possible to prevent confusion with knob caps having other function display characters attached, and also has the effect of simplifying assembly work.

Note that the extending portion 411b of the protruding portion 41b may protrude from either one surface of the knob base 11b.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a knob used in the knob device of this embodiment of the invention, Figure 2 is an exploded perspective view of the knob device of this embodiment of the invention, and Figure 3 is a front view of the knob of the embodiment of this invention. , Figure 4 is an exploded perspective view of a knob used in another embodiment of this invention, and Figure 5 is an exploded perspective view of a knob used in another embodiment of this invention.
The figure is an exploded perspective view of a conventional knob. 11a, 11b are knob bases, 14a, 14
b is a protrusion, 12a and 12b are knob caps,
15a, 15b are ridges, 16a, 16b are grooves, 1a, 1b are knobs, 13a, 13b are knob shafts, 2a, 2b are switches, 21a,
21b is a shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] A set of two knobs arranged side by side, each consisting of a knob cap and a knob base integrally formed with a knob shaft that is connected to the knob cap and into which the tip of the shaft of a switch type is fitted. In the knob device used, at one end of the knob bases 11a, 11b,
The protrusions 14a, 14b are connected to the knob caps 12a, 12b and the knob bases 11a, 1, respectively.
1b has ridges 15a and 15b extending in the horizontal direction offset from the vertical center on one side of the joint surface of 1b, and grooves 1 on the other side that engage with the ridges 15a and 15b.
6a and 16b, respectively, and the respective knob shafts are formed on the back surfaces of the knob bases 11a and 11b when the knobs 1a and 1b are arranged such that the protrusions 14a and 14b are located outward, respectively. Adjust the knob shaft 1 so that the central axes of the knobs 13a, 13b are positioned inward from a half 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 when the knobs 1a, 1b are arranged so that the protrusions 14a, 14b are located outward, respectively, the respective knob shafts 1 of the knobs 1a, 1b are formed.
3a, 13b and the switches 2a,
2b, 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.