JPH0722431U - Rotary switch - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotary switch which can be assembled with a simple configuration using a small number of parts, and which can be used in combination at low cost and in a multi-functional manner. [Structure] An annular second knob (3) into which a first knob (1) can be fitted with a rotating shaft (2) and a circumferential direction of the second knob are arranged, and a locking projection (8A ), An elastic click arm (8), an actuating projection (3B) axially protruding from the second knob (3), and the second knob (3) are rotatably fitted, and the fitting is performed. By the switch support mechanism (4) mounted on the housing panel (5) and the actuating protrusion (3B), which has a plurality of click teeth (9) with which the locking protrusion (8A) can be engaged in the state. A rotary switch comprising a plurality of switch means (7) that are selectively energized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary switch, and more particularly to a rotary switch that can be configured in combination with an operation knob such as a variable resistor.

[0002]

[Prior art]

 In a commonly used rotary switch, the operating shaft is rotated by a knob, etc., and the switching circuit is used to switch the connected circuit and turn the circuit on and off. In most cases, a click mechanism etc. is provided in order to let the operator clearly recognize the state.

Further, for example, as shown in FIG. 4, a variable resistor (hereinafter referred to as a volume) is combined with a two-axis type to enable both a volume operation and a switching operation for a contact circuit on a substrate. It is known (manufactured by Alps Electric Co., Ltd., model number S21P H-24II / RV N0 329011400). In FIG. 4, 11 is a knob mounting portion of a first shaft (not shown) to which a first knob (not shown) is mounted, 12 is a second shaft to which a second knob (not shown) is mounted, and 16 is a mounting portion thereof. The first shaft penetrates through the central portions of the mounting portion 16, the switch rotation shaft 15 and the second shaft 12 to transmit rotational power to the volume 13. Reference numeral 14 is a circuit board provided with a plurality of switching contacts (not shown), and a switch rotating shaft 15 is provided with a contact piece 17 for switching a plurality of contacts on the circuit board 14 and a switch. A latch mechanism 18 for holding the rotating shaft 15 in the switching position is provided. Reference numeral 19 is a support fitting that supports the volume 13.

In the rotary switch having the double shaft type as described above, the volume is changed by the first knob attached to the attaching portion 11, and the contact point on the substrate 14 is changed by the second knob attached to the attaching portion 16. It is possible to perform the switch operation that switches the.

[0005]

[Problems to be solved by the device]

 However, such a conventional rotary switch 10 can perform both axial rotation of the volume and the like and switch operation of contact switching by constituting a double shaft type, but the number of parts is large and the structure is large. Is complicated, the assembly work is troublesome, and the cost is high.

An object of the present invention is to pay attention to the above-mentioned conventional problems, and in order to solve the problems, a rotary switch having a simple structure, a small number of parts, a low cost, and a multifunctional combination that can be used. To provide.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a ring-shaped second knob in which a first knob and a rotation shaft thereof can be rotatably fitted with each other, and a distal end portion formed in a circumferential direction of the second knob. A click arm that has an outwardly projecting locking projection and that can be swung in the radial direction by elasticity, and a projection that is projected from the second knob in the rotation axis direction and urges the switch means. And a plurality of click teeth, which rotatably fit the second knob and engage the locking projections in the fitted state, are provided on the housing panel. A plurality of switch support mechanisms to be attached and a plurality of switches arranged in the circumferential direction and selectively urged by the actuating projections in a state where the locking projections are engaged with the click teeth by the rotation of the second knob. And a switch means for rotating the second knob in any direction so that the second knob can be operated with a substantially uniform force. By also in the range wherein the switching of the switch means has to be capable.

[0008]

[Action]

 According to the present invention, by rotating the second knob, the locking protrusions of the click arm provided on the second knob are engaged with the click teeth of the switch supporting function one after another, and at that position, the operating protrusions sequentially. The switch means can be switched, and the first knob for multifunctional operation can be concentrically incorporated.

[0009]

【Example】

 Embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. First, main components of the present invention will be described with reference to FIG. Here, 1 is a first knob fixed to a rotating shaft 2, 3 is an annular second knob into which the first knob 1 is rotatably fitted, and 4 is a rotatably holding second knob 3. At the same time, for example, a switch support mechanism 6 provided on a housing panel 5 of an electronic device or the like is supported and fixed at a predetermined distance from the housing panel 5, and a plurality of switching elements ( For example, it is a circuit board in which microswitches 7 that are turned “on” by pressing are arranged at equal positions in the circumferential direction. In this example, the switch support mechanism 4 is formed integrally with the housing panel 5 from ABS resin (acrylonitrile / butadiene / styrene resin). However, the switch support mechanism 4 may be molded as a single unit and attached to the housing panel 5. You may

On the other hand, in the present example, the second knob 3 having a substantially annular shape is made of polyacetal resin, which is a resin material having excellent elasticity, fatigue resistance, and creep resistance, a low friction coefficient, and high insulation. A cantilever-shaped arm (hereinafter referred to as a click arm) 8 is provided in the groove 3A at the axially symmetrical position along the circumferential direction by using the elasticity. 8A is a locking projection protruding outward from the outer peripheral tip of the click arm 8 and 3B is a projection protruding from the tip of the second knob 3 on the side fitted to the switch support mechanism 4 toward the circuit board 6 side. The operating protrusions are provided, and one of the microswitches 7 on the circuit board 6 is selectively biased by the tip of the operating protrusion 3B in the assembled state as shown in FIGS. 2A and 2B. be able to. Further, in such an assembled state, the above-mentioned locking projection 8A is projected into a click groove 4A of the switch support mechanism 4 which will be described later, so that the removal is prevented, and the second knob 3 is rotated to the switch support mechanism 4. It can be supported freely.

Next, details of the switch support mechanism 4 will be described.

Reference numeral 9 denotes a click tooth formed by alternately forming a gentle slope 9A and a steep slope 9B along the peripheral wall of the click groove 4A of the switch support mechanism 4 as shown in FIG. The tooth 9 and the click arm 8 of the second knob are designed to maintain the relationship shown in the figure in the click groove 4A. That is, the gentle slope 9A and the steep slope 9B as described above cause the frictional resistance generated in the locking projection 8A when the second knob 3 is rotated in the direction of arrow A and the second knob 3 to move in the direction of arrow C. The tilt angle is set so that the frictional resistance that also occurs when it is rotated in the same direction is maintained almost the same, and this allows the second knob 3 to be turned clockwise or counterclockwise. Even when it is rotated in the direction of, the same click feeling can be maintained. As shown in FIG. 3, the locking projection 8A is located in the valley formed by the two inclined surfaces 9A and 9B due to the elasticity of the click arm 8 and the operating projection 3B of the second knob 3 causes one switch to move. The element 7 is activated.

When assembling the rotary switch having such a configuration, the annular portion including the click arm 8 of the second knob 3 is axially arranged in the click groove 4 A of the switch support mechanism 4 provided on the housing panel 5. Then, using the elasticity of the click arm 8, the locking projection 8A is engaged with the click tooth 9 as shown in FIGS. 2B and 3. As a result, the second knob 3 is rotatably supported by the switch support mechanism 4 and the locking projection 8A is regulated by the side surface of the click groove 4A as shown in FIG. 3 is prevented from coming out of the switch support mechanism 4. The switch element 7 on the circuit board 6 can be kept in an operable state by the operation protrusion 3B protruding from the second knob 3 toward the circuit board 6 side.

Further, in such an assembled state, the first knob 1 is rotatably fitted in the annular hole 3C of the second knob 3, and the rotary shaft 2 is fixed to the first knob 3 as shown in FIG. As shown in (A) and (B), by pulling out the rotary shaft 2 to the side of the circuit board 6, and attaching a volume (not shown) to the rotary shaft end, the first knob 1 adjusts the volume. You can adjust the resistance by operating. It should be noted that what is operated by the rotation of the first knob 1 is not limited to the volume, and other functional adjustment means may be used. Thus, according to this embodiment, it is possible to provide a rotary switch which can be integrated with other adjusting means such as a volume at a low cost with a simple assembly configuration.

In the above-described embodiment, the rotary switch for actuating the switch element on the circuit board is configured by the combination of the switch support mechanism and the second knob. However, the switch mechanism and the second knob are operated only once. It is also possible to arrange a plurality of rotary switch mechanisms so that they can be individually operated by arranging a plurality of them concentrically around the axis of motion.

[0017]

[Effect of device]

 As described above, according to the present invention, the first knob is formed in the circumferential direction of the ring-shaped second knob in which the first knob and the rotation shaft can be rotatably fitted, and the tip portion. Has a locking projection that projects outward, and is elastically swingable in the radial direction, and a second projection that projects from the second knob in the rotation axis direction and biases the switch means. And a plurality of click teeth in the circumferential direction, which engages the second protrusion with the actuating protrusion for allowing the engaging protrusion to engage with the engaging protrusion in a fitted state, and is provided on the housing panel. A switch support mechanism to be mounted, and a plurality of switches arranged in the circumferential direction and selectively urged by the actuating protrusion in a state of engagement of the locking protrusion with the click tooth by rotation of the second knob. Means for rotating the second knob in any direction to generate a substantially uniform acting force. Since the switching means can be switched, it is excellent in functionality by a simple assembly work with a small number of parts, and can be inexpensively constructed by combining with other functional adjusting means such as a volume. Not only that, it is possible to provide a rotary switch that can be operated by a combination of turning the switch means on and off.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an example of the configuration of a rotary valve of the present invention.

FIG. 2 is an explanatory view showing a configuration of the rotary valve shown in FIG. 1 in an assembled state by a perspective view (A), a sectional view (B) and a partial sectional view (C) of (B).

FIG. 3 is an explanatory view of a click operation of the second knob according to the present invention.

FIG. 4 is a perspective view showing a configuration example of a conventional two-shaft rotary valve.

[Explanation of symbols]

 1 1st Knob 2 Rotating Shaft 3 2nd Knob 3A Groove 3B Operating Protrusion 4 Switch Support Mechanism 4A Click Groove 5 Housing Panel 6 Circuit Board 7 Switch Element (Micro Switch) 8 Click Arm 8A Locking Protrusion 9 Click Tooth 9A Loose (Gradient) slope 9B steep (gradient) slope

Claims (2)

[Scope of utility model registration request] 1. A ring-shaped second knob in which a first knob is rotatably fitted together with its rotation shaft, and a second knob formed in the circumferential direction of the second knob. A click arm that has a locking projection that is elastically swingable in a radial direction; an operating projection that projects from the second knob in the direction of the rotation axis and biases the switch means; (2) A switch support mechanism that is mounted on a housing panel and that has a plurality of click teeth in the circumferential direction that fit the knobs rotatably and that can engage the locking protrusions in the fitted state; And a plurality of switch means that are selectively biased by the actuating protrusions in a state where the locking protrusions are engaged with the click teeth by the rotation of the second knob. Rotating the knob in any direction allows switching of the switch means with almost even acting force Rotary switch, characterized in that the the like. 2. The rotary switch according to claim 1, wherein other electrical parts can be operated by the first knob and its rotating shaft.