JP2514855Y2 - Volume knob - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a knob suitable for use in a volume of an audio device or the like, and particularly to a volume knob with a light emitting indicator.

[Conventional technology]

Conventionally, a volume knob with an indicator, which is attached to a volume shaft of an audio device or the like and whose rotation position is displayed by a light emitting index display portion, is constructed as shown in FIGS. 5 and 6. Things are known. That is, the volume knob 1 is provided with an aluminum knob body 2 formed in a cup shape, and a light emitting diode (hereinafter referred to as an LED) as an index display portion is provided in an insertion hole 3 provided near the front peripheral portion of the knob body 2. 4) is inserted from the front side, the lead 5 is inserted into the lead hole (not shown) of the printed circuit board 6 and soldered to the electric circuit of the printed circuit board 6, and then the lead is cut.
The printed circuit board 6 is inserted and arranged in the knob body 2 through the opening on the back side, and is fixed to the knob body 2 by the plastic nut 7. At the center of the inner surface of the knob body 2, a cylindrical body 9 fitted to the volume shaft 8 is integrally projected.
The fitting portion of the volume shaft 8 and the hole 10 of the tubular body 9 are D-shaped so that they can fit with each other, whereby the knob 1 and the volume shaft 8 rotate integrally.

[Problems to be solved by the device]

However, in such a conventional volume knob 1 with an indicator, there are many work processes such as the work of inserting the LED 4, the work of assembling the printed circuit board 6, the work of soldering the leads 5, and the work of inserting the LED 4 into the insertion hole 3 as well. Since it is troublesome and time-consuming, it requires a lot of time and effort,
There was a problem of poor productivity. Further, when the LEDs 4 are soldered, the head positions of the LEDs 4 may vary, or when the LEDs 4 are inserted into the insertion holes 3, the LEDs 4 may be damaged.

Therefore, the present invention solves the above-mentioned problems, simplifies the working process, shortens the working time, improves the productivity and quality, and illuminates the index display section well. The purpose is to provide the volume knob that has been set.

[Means for solving the problem]

In order to achieve the above object, the invention has a knob body having a non-circular volume shaft, a knob body having an index display portion made of a light guide member and fitted and fixed to the tip end portion of the volume shaft,
The knob body includes a light source that is disposed inside or on the back side to illuminate the index display portion, and a light source support body that is fitted to the volume shaft and supports the light source. The light source support body is the knob body. The light source is held and fixed by the locking portion of the volume shaft, and is rotated integrally with the volume shaft so that the light source is always aligned with the index display unit.

[Action]

In this invention, the knob body and the volume shaft hold the light source support. The light of the light source passes through the light guide portion and shines on the index display portion formed of the light guide member. The light source support is fitted to the non-circular shaped end portion of the volume shaft, and interlocks with the rotation of the volume shaft to keep the distance between the light source and the index display unit constant. The light source is attached to the light source support and rotates together with the light source support when the volume shaft rotates.

〔Example〕

Hereinafter, this invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of the volume knob according to the present invention, and FIG. 2 is a front view. In addition, the fifth in the figure
The same components and parts as those in FIG. 6 and FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, a light guide member 11 such as a cup-shaped transparent acrylic resin is fitted and fixed in the inside of the knob body 2 made of aluminum. The index display portion 12 is integrally projectingly inserted into the insertion hole 3 of the knob body 2 and the tip of which is exposed on the front surface of the knob body 2. Reflecting portions 14 are provided so as to protrude from the index display portions 12, respectively. The hole shape of the central hole 15 of the cylindrical portion 13 is D-shaped.
The tip portion 8a of the volume shaft 8 is press-fitted into the. The tip portion 8a has a D-shaped cross section, and has a step portion 16 as a locking portion for the printed circuit board 6 on the peripheral surface of the base end portion. The reflection part 14 is composed of two protrusions 14A and 14B that form a right-angled triangle and are arranged side by side in the radial direction of the light guide member 11.
The light from 4 is reflected and guided to the index display section 12.

The LED 4 is arranged at an end portion of a printed circuit board 6 as a light source supporter that supports the LED 4 so as to be located near the back surface of the index display unit 12. The printed circuit board 6 has a D-shaped hole 17 through which the tip portion 8a of the volume shaft 8 is inserted, and is held by the tip surface of the cylindrical portion 13 and the step portion 16 of the tip portion 8a. The printed circuit board 6 is linked with the rotation of the volume shaft 8.

Thus, the volume knob 1 with such a structure
According to the above, since the printed circuit board 6 is held between the tip surface of the cylindrical portion 13 of the light guide member 11 and the step portion 15 of the volume shaft 8,
There is no need to bother fixing the printed circuit board 6 to the knob 1 with a plastic knife, the work of assembling the printed circuit board 6 can be simplified, and there is no need to insert the LED 4 into the insertion hole 3 and the LED 4 is not easily scratched. Since it can be mounted on the printed circuit board 6 in advance, automatic mounting is possible and the workability of assembling the knob and the productivity can be remarkably improved. Moreover, since the LED 4 does not immediately form the indicator portion but makes the index display portion 12 of the light guide member 11 shine, the degree of freedom in design is expanded.
Furthermore, since the printed circuit board 6 remains on the volume shaft 8 even if the knob 1 is pulled out from the volume shaft 8, there is no fear of disconnecting the lead wire 18, and the knob 1 and the LED 4 can be easily replaced.

Further, in this embodiment, since the LED 4 is surrounded by the resinous light guide member 11, the insulating property between the metal knob body 2 and the lead of the LED 4 is sufficiently large, and an unexpected short circuit occurs. There is nothing to do.

In this case, in this embodiment, the LED 4 and the index display unit 12
Since the and are shifted in the radial direction of the knob body 2,
Although the light emitted from the LED 4 is guided to the index display unit 12 by providing the LED 14, the reflection unit 14 is not necessary when the LED 4 and the index display unit 12 are matched with each other.

Further, the knob body 2 and the light guide member 11 are integrally formed by insert molding, which enables a reduction in the number of assembling steps. However, the knob body 2 and the light guide member 11 are not limited to be integrally formed but are formed separately and independently. Good.

Further, although the printed circuit board 6 is inserted into the knob body 2 in this embodiment, it may be projected to the back side. As shown in FIG. 3, the hole 17 of the printed circuit board 6 may be such that one end thereof is open to one side surface of the printed circuit board 6, and the point is that the hole 17 can prevent the printed circuit board 6 from freely rotating. . Similarly, the cross-sectional shape of the tip portion 8a of the volume shaft 8 is not limited to the D-shape, but may be an appropriate shape other than a perfect circle such as a triangle, a quadrangle, or an oval shape.

FIG. 4 is an external perspective view of a knob showing another embodiment of the present invention. In this embodiment, the knob body 2 and the light guide member 11 are used.
Are integrally formed by insert molding or outsert molding, and the light guide member 11 is exposed to the outside from the slit groove 20 formed in the front surface radial direction and the peripheral surface axial direction of the knob body 2, and this exposed portion is exposed. The indicator display section,
Other configurations are the same as those in the above embodiment.

Even with such a configuration, the same effect as that of the above embodiment can be obtained.

In addition, although the knob body 2 is made of Al in any of the above embodiments, it is not limited to this and may be made of resin. In that case, for example, if the knob body and the index display portion are integrally molded by two-color molding using resin or the like, the number of constituent elements can be further reduced.

[Effect of device]

As described above, according to the volume knob of the present invention, the tip end of the volume shaft that supports the light source has a non-circular shape, the light source support is fitted to the tip, and the light source support is used as the knob body. Since it is sandwiched and fixed with the locking part of the volume shaft, the work of assembling the light source and its support is easy, the workability of assembling the knob and productivity can be improved, and the number of assembling steps is reduced to improve quality. Variations can be reduced and inexpensive knobs can be provided.

Further, in this invention, the light source and the index display section are matched and correspond to each other, so that the index display section of the volume amount can always be illuminated with the same brightness and bright regardless of the turning position of the knob body. Can be improved.
Therefore, the volume is visually easy to understand.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a volume knob according to the present invention, FIG. 2 is a front view, FIG. 3 is a plan view showing another embodiment of a printed circuit board, and FIG. FIGS. 5 and 6 are an exploded sectional view and a bottom view of a conventional volume knob, respectively. 2 ... knob body, 3 ... insertion hole, 4 ... light emitting diode, 5 ... lead, 6 ... printed circuit board (light source support), 8 ... volume axis, 11 ... light guide member, 12 ... …
Index display part, 16 ... Step part (locking part).

Claims (1)

(57) [Scope of utility model registration request] 1. A knob main body having a non-circular volume shaft, an index display portion made of a light guide member, and fitted and fixed to a tip end portion of the volume shaft, and a knob main body disposed inside or on the rear surface side. A light source that is provided to illuminate the index display section and a light source support body that is fitted to the volume shaft and supports the light source are provided. The light source support body is clamped and fixed by a locking portion of the knob body and the volume shaft. The volume knob is characterized in that the light source is always matched with the index display portion by being rotated integrally with the volume shaft.