JPH0733322Y2 - Rotary electronic components with double shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rotary electronic component with a double shaft.

[Conventional technology]

Conventionally, a rotary switch has a first rotary shaft and a second rotary shaft that rotate about the same axis. By rotating the first rotary shaft, a desired rotary switch is switched, and a second rotary shaft is rotated. There is a structure in which other rotary switches are switched by rotating.

FIG. 4 is a side sectional view showing a conventional rotary switch with a double shaft of this type.

As shown in the figure, the rotary switch with a double shaft is composed of a substrate 61 having a predetermined circuit pattern formed on the upper surface thereof, and a first shaft rotatably supported by a hole 64 provided at a substantially central portion of the substrate 61. A first sliding type object 67 having a first rotating shaft 68;
Second rotary shaft rotatably inserted outside the rotary shaft 68 of
Second sliding type object 73 provided with 74, and the second sliding type object 73
And a lower case 81 fixed to the substrate 61 and fixed to the substrate 61, and a lower case 81 fixed to the substrate 61 and covering the lower face of the substrate 61.

Here, the substrate 61 is a sheet-shaped flexible substrate 62 having a circuit pattern of a rotary switch formed on its upper surface,
The flexible substrate 62 is formed of a synthetic resin casing 63 whose upper and lower surfaces are exposed and whose peripheral and lower surfaces are molded.

Further, a plate-shaped first mounting plate 69 is provided on the outer periphery of the lower part of the first rotating shaft 68 facing the substrate 61, and the lower surface thereof is made of metal and is in sliding contact with the circuit pattern on the flexible substrate 62. A slider 70 is attached.

On the other hand, a plate-shaped second mounting plate 75 is provided on the outer periphery of the lower part of the second rotating shaft 74 facing the substrate 61, and the lower surface of the second mounting plate 75 is made of metal and is in sliding contact with the circuit pattern on the flexible substrate 62. A slider 76 is attached.

Then, when the first rotary shaft 68 is rotated, the slider 70 slides on the circuit pattern on the flexible substrate 62 to turn on / off between desired circuit patterns, and when the second rotary shaft 74 is rotated, it slides. The armature 76 slides on another circuit pattern on the flexible substrate 62 to turn on / off a desired circuit pattern.

Reference numeral 78 shown in the figure is a detent plate fixed to the lower end of the first rotary shaft 68, and is rotated by engaging with a locking portion made of a spring member attached to a lower case (not shown). A known detent mechanism for locking the rotary shaft 68 at that position is formed.

[Problems to be solved by the device]

By the way, recently, since the rotary electronic component with a double shaft of this kind is required to be thin, the substrate 61 is also being thin.

However, when the thickness of the substrate 61 is reduced, the thickness of the hole 64 provided in the substrate 61 is reduced, so that the first rotary shaft 68 pivotally supported by the hole 64 is loosened, and accordingly, the second There was a problem that the rotating shaft 74 also rattles.

The present invention has been made in view of the above points, and an object of the present invention is to provide a rotary electronic component with a double shaft in which backlash is less likely to occur in the first rotary shaft even when the substrate is thin.

[Means for Solving the Problems]

In order to solve the above problems, the present invention comprises a flexible substrate 11 having a circuit pattern formed on a synthetic resin sheet, and the flexible substrate 11 is housed in a synthetic resin housing 13 so that the circuit pattern is exposed. Board 10 inserted in
And a first slider attachment in which a first rotary shaft 21 that rotates about a substantially central portion of the circuit pattern of the substrate 10 and a metal slider 29 that slides on the circuit pattern are attached. Board 23
And a first sliding mold 20 integrally molded with a synthetic resin, and a second rotation that is in sliding contact with the outer peripheral surface of the first rotation shaft 21 and rotates about the same axis as the first rotation shaft 21. A multiplex comprising a shaft 31 and a second slide mounting plate 33 on which a metal slider 37 slidingly contacting the circuit pattern is mounted, and a second sliding mold 30 integrally formed of synthetic resin. In the rotary electronic component with a shaft, the casing is provided at a substantially central portion of the circuit pattern of the substrate 10.
A cylindrical protrusion 16 integral with 13 is provided so as to project, and a recess 25 into which the protrusion 16 is inserted is provided on the lower surface of the first rotating shaft 21, and the protrusion 16 is provided at the center of the recess 25. A cylindrical protrusion 27 that is rotatably inserted is provided on the inner peripheral surface side of the.

[Action]

With the above configuration, the protrusion provided on the substrate 10
The protrusion 27 provided on the first rotating shaft 21 can be rotatably and reliably supported on the inner peripheral surface of the shaft 16.

For this reason, even if the substrate 10 becomes thin, the first rotary shaft 21 is less likely to rattle.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side sectional view showing a rotary electronic component with a double shaft according to this embodiment.

As shown in the figure, this rotary electronic component with a double shaft includes a substrate 10 in which a flexible substrate 11 is inserted in a synthetic resin housing 13, a first sliding type object 20, and a second sliding type object. Moving object 30
An upper case 40 which is rotatably supported on the second sliding type object 30 to cover the upper part thereof and which is fixed to the substrate 10, and a substrate.
The detent mechanism 50 is disposed below the detent mechanism 50, and the lower case 60 covers the lower portion of the detent mechanism 50.

Each component will be described below.

FIG. 2 is a plan view showing the substrate 10.

As shown in FIG. 1 and FIG. 1, this substrate 10 has a switch pattern of a rotary switch on the upper surface of a synthetic resin film.
A flexible substrate (11) on which a part (15) is formed is insert-molded in a housing (13) made of synthetic resin. At this time, the switch pattern 15 on the flexible substrate 11 is exposed on the upper surface.

That is, the flexible substrate 11 is sandwiched by the mold from above and below,
The substrate 10 is constructed by press-fitting a synthetic resin into the mold and then removing the mold.

By the way, at the center of the substrate 10, there is provided a cylindrical protrusion 16 protruding upward. This protrusion
16 is integrally formed at the same time as the case 13 is formed.

Metal terminals 17 are connected to the end portions of each switch pattern 15 of the flexible substrate 11. This metal terminal 17
The fixing of the metal terminal 17 to the flexible substrate 11 is placed on the end of each switch pattern 15 of the flexible substrate 11, and the strip-shaped terminal fixing film 19 is placed thereon.
This is performed by thermally welding between the flexible substrate 11 and the terminal fixing film 19 in the portion between the metal terminals 17 and 17.

The method of inserting the flexible substrate 11 into the housing 13 and the method of fixing the metal terminal 17 to the flexible substrate 11 are described in detail in, for example, Japanese Patent Laid-Open No. 64-50504 previously proposed by the applicant of the present application. ing.

Next, as shown in FIG. 1, the first sliding type object 20 has a first rotating shaft 21 and a substantially disc-shaped body integrally formed on the lower outer periphery of the first rotating shaft 21. It is constituted by the first slider mounting plate 23.

Here, on the lower surface of the first rotary shaft 21, there is formed a recess 25 into which the projection 16 can be inserted.

Further, in the central portion of the recess 25, projecting downward,
A cylindrical protrusion 27 that is rotatably inserted is provided on the inner peripheral surface of the cylindrical protrusion 16.

On the lower surface of the first slider mounting plate 23, a metallic slider 29 which is in sliding contact with the circuit pattern formed on the flexible substrate 11 is mounted.

On the other hand, as shown in FIG. 1, the second sliding type object 30 includes a second rotating shaft 31 and a substantially disk-shaped first rotating shaft 31 formed integrally with the lower rotating shaft 31. It is constituted by two slider mounting plates 33.

Here, a hole is formed in the central portion of the second rotary shaft 31, and the second rotary shaft 31 is slidably contacted with the outer peripheral surface of the first rotary shaft 21 in the hole to form the second rotary shaft 31.
A cylindrical ring portion 35 for rotating the rotating shaft 31 of the first rotating shaft 31 about the same axis as the first rotating shaft 21 is provided.

On the lower surface of the second slider mounting plate 33, a metallic slider 37 that is in sliding contact with the circuit pattern formed on the flexible substrate 11 is mounted.

On the other hand, the detent mechanism 50 includes a detent plate 51 and a disk-shaped elastic member 53 that elastically elastically contacts the side surface of the detent plate 51.
It is composed by.

Here, the detent plate 51 is fixed to the lower end of the protrusion 27 of the first rotating shaft 21.

FIG. 3 is a plan view showing an engaged state of the detent plate 51 and the elastic member 53.

As shown in the figure, a large number of uneven surfaces are formed on the outer peripheral surface of the detent plate 51. The elastic member 53 is in contact with this uneven surface. The elastic member 53 is elastically elastically moved in the direction A by a spring member (not shown).

Here, the operation of the detent mechanism 50 will be described.

First, when the first rotary shaft 21 shown in FIG. 1 is rotated, the detent plate 51 integrally attached thereto rotates in the direction of arrow B shown in FIG. Then, when the hand is released to the desired position, the elastic member 53 engages with the concave portion of the outer peripheral surface of the detent plate 51, so that the first rotary shaft 21 can be held at that position.

Next, the operation of this rotary electronic component with a double shaft will be described.

As shown in FIG. 1, when the first rotary shaft 21 is first rotated, the first slider mounting plate 23 rotates integrally with the first rotary shaft 21. As a result, the slider mounted on the first slider mounting plate 23
29 slides on the switch pattern of the flexible substrate 11, whereby the desired on / off state between the metal terminals 17 is switched.

On the other hand, when the second rotating shaft 31 is also rotated, the second slider mounting plate 33 rotates integrally with the second rotating shaft 31, and the second slider mounting plate 33 is rotated.
The slider 37 attached to the 33 slides on the switch pattern of the flexible substrate 11, whereby the desired metal terminal 17
The on / off state between them is switched.

By the way, in the present invention, the protrusion 16 is provided on the substrate 10,
The protrusion 27 provided on the first sliding mold 20 on the inner peripheral surface of the protrusion 16
Since the outer peripheral surface of the first sliding mold is supported, even if the thickness of the substrate 10 is reduced, the first sliding type object 20 is less likely to rattle. Along with this, the backlash of the second sliding type object 30 supported by the outer peripheral surface of the first rotating shaft 21 is less likely to occur.

In this embodiment, the detent mechanism is used as the first sliding type object 20.
However, a detent mechanism may be provided between the outer periphery of the second slider mounting plate 33 and the upper case 40 by a known method to attach the detent mechanism to the second sliding die 30. It is easily possible.

It is needless to say that the present invention is not limited to the rotary switch, and can be applied to other rotary electronic components with a double shaft (for example, a rotary variable resistor with a double shaft).

[Effect of device]

As described in detail above, according to the rotary electronic component with a double shaft according to the present invention, the inner peripheral surface of the cylindrical protrusion provided on the substrate is the outer peripheral surface of the protrusion provided on the first rotary shaft. Since it has a structure in which it is rotatably supported, it has an excellent effect that the first rotary shaft is less likely to be rattled, and accordingly, the second rotary shaft is also less likely to be rattled.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a rotary electronic component with a double shaft according to this embodiment, FIG. 2 is a plan view showing a substrate 10, and FIG. 3 is an engagement state of a detent plate 51 and an elastic member 53. A plan view showing
FIG. 4 is a side sectional view showing a conventional rotary switch with a double shaft. In the figure, 10 ... substrate, 11 ... flexible substrate, 13 ... housing, 15 ... switch pattern, 16 ... projection, 20 ... first sliding type object, 21 ... first rotation Shaft, 23 …… First slider mounting plate, 25 …… Concave, 27 …… Protrusion, 29 …… Slider, 30
...... Second sliding type object, 31 ...... Second rotating shaft, 33 ...... Second
Slider mounting plate, 37 ... Slider.

Claims (1)

[Scope of utility model registration request] 1. A substrate comprising a flexible substrate having a circuit pattern formed on a synthetic resin sheet, the flexible substrate being inserted into a synthetic resin casing so that the circuit pattern is exposed, and the circuit of the substrate. A first rotary shaft that rotates about a substantially central portion of the pattern as an axis and a first slider mounting plate having a metallic slider that slidably contacts the circuit pattern are integrally molded of synthetic resin. The first sliding type object, the second rotating shaft that is in sliding contact with the outer peripheral surface of the first rotating shaft and rotates about the same axis as the first rotating shaft, and the metal that is in sliding contact with the circuit pattern. A rotary electronic component with a double shaft, comprising: a second slider mounting plate for mounting the slider of 1) and a second sliding mold integrally molded of a synthetic resin. Cylindrical protrusion integral with the housing at approximately the center And a recess for inserting the projection is provided on the lower surface of the first rotating shaft, and a projection rotatably inserted on the inner peripheral surface side of the projection is provided at the center of the recess. A rotary electronic component with a double shaft characterized by being provided.