JP2017091986A - Rotary switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary switch capable of preventing malfunction caused by sticking of grease, applied to a click mechanism, on a substrate.SOLUTION: A rotary switch 1 is constituted by accommodating, in a space formed of a main body case 2 and a cover 3 covering a rear opening part thereof, a rotor 5 which rotates together with a dial knob 4, a substrate 8 on which a detector detecting the rotor 5 rotating and a control circuit outputting a control signal to various equipment in response to a detection signal from the detector are mounted, and a click mechanism 9 which imparts a click when the dial knob 4 is rotated. The rotor 5 is extended toward the cover 3 by penetrating the substrate 8, and the click mechanism 9 is arranged nearby an extension end thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotary switch provided with a click mechanism for imparting a click feeling (moderation feeling) to the rotation of a dial knob.

  The rotary switch is used for control of various devices, for example, temperature adjustment of an in-vehicle air conditioner, and this is provided with a click mechanism for giving a click feeling to the rotation of the dial knob (for example, Patent Document 1). reference). An example of a conventional rotary switch is shown in FIG.

  That is, FIG. 2 is a broken sectional view of a conventional rotary switch. The illustrated rotary switch 101 is a cylinder that rotates together with the dial knob 104 in a space formed by a main body case 102 and a cover 103 that covers the opening on the rear surface. Rotor 105, a substrate 108 attached to a cylindrical dial base 106 fixed inside the rotor 105 by a plurality of screws 107, a click mechanism 109 that gives a click feeling to the rotation of the dial knob 104, etc. It is configured to accommodate. Although not shown, the substrate 108 is mounted with a detector such as a photo interrupter that detects the rotation of the rotor 105, and a control circuit that outputs a control signal to various devices based on a detection signal from the detector. ing. Further, the click mechanism 109 is held at the end of the rotor 105 by a plurality of engagement recesses 105a in the circumferential direction, and held by the cover 103 so as to be slidable in the lateral direction (left-right direction in FIG. A click member 110 that selectively engages with the engagement recess 105a, and a spring 111 as a biasing member that biases the click member 110 toward the engagement recess 105a of the rotor 105 (to the left in FIG. 2). ing.

  In such a rotary switch 101, when an operator rotates the dial knob 104, the rotor 105 rotates together with the dial knob 104, and a detector (not shown) in which the rotation direction and the rotation amount of the rotor 105 are mounted on the substrate 108. And the detection signal is transmitted to a control circuit (not shown) mounted on the substrate 108 to control various devices such as an air conditioner. When the rotor 105 rotates together with the dial knob 104, the click member 110 biased by the spring 111 selectively engages with a plurality of engaging recesses 105a formed in the circumferential direction on the outer periphery of the rotor 105. A click feeling is given to the rotation of the dial knob 104.

JP 2010-212102 A

  In the assembly of the conventional rotary switch 101 shown in FIG. 2, the rotor 105 is assembled from the lower side of FIG. 2 before fixing the substrate 108, and then the substrate 108 is attached to the dial base 106 with a plurality of screws 107. . In this case, since the grease which is a lubricant is applied to the engaging recess 105a of the rotor 105, the grease adheres to surrounding parts when the rotor 105 is assembled, and the adhered grease eventually adheres to the substrate 108 as well. As a result, the rotary switch 101 malfunctions.

  The present invention has been made in view of the above problems, and the object of the present invention is to provide a rotary switch that can prevent malfunction due to adhesion of grease applied to a click mechanism to a substrate.

  In order to achieve the above object, a first aspect of the present invention provides a rotor that rotates together with a dial knob in a space formed by a cover that covers a main body case and a rear surface opening, and a detector that detects the rotation of the rotor. In a rotary switch that houses a substrate on which a control circuit that outputs a control signal to various devices according to a detection signal from the detector is mounted, and a click mechanism that gives a click feeling to the rotation of the dial knob, The rotor extends through the substrate to the cover side, and the click mechanism is disposed in the vicinity of the extended end.

  According to a second aspect of the present invention, in the first aspect of the invention, the click mechanism includes a plurality of engagement recesses formed in a circumferential direction at an end portion of the rotor and a slidably held by the cover. A click member that selectively engages with the engaging recess, and a biasing member that biases the click member toward the engaging recess.

  According to the present invention, the rotor is extended to the cover side through the substrate, and the click mechanism is disposed in the vicinity of the extended end, so that the sliding portion of the click mechanism (engagement between the engagement recess of the rotor and the click member) The grease applied to the cover) adheres to the cover, but does not adhere to the components or the substrate around the substrate. Therefore, the grease adheres to various electronic components such as detectors and control circuits mounted on the substrate. A malfunction of the rotary switch is reliably prevented.

  Moreover, since the click mechanism is moved from the periphery of the substrate to the cover side and dispersedly arranged, the mounting area of the substrate increases, and various electronic components can be rationally arranged on the substrate.

It is a fractured sectional view of the rotary switch concerning the present invention. It is a fracture cross-sectional view of a conventional rotary switch.

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

  FIG. 1 is a broken sectional view of a rotary switch according to the present invention. The illustrated rotary switch is for adjusting the temperature of an in-vehicle air conditioner. In practice, the rotary switch is the top of FIG. It is installed sideways so that the side is the front and the bottom is the rear.

  Thus, the illustrated rotary switch 1 includes a cylindrical rotor 5 that rotates together with the dial knob 4 in a space formed by the main body case 2 and the cover 3 that covers the opening on the rear surface, and the rotor 5. It is configured to accommodate a substrate 8 or the like attached to a fixed cylindrical dial base 6 with a plurality of screws 7. Although not shown, the substrate 8 is mounted with a detector such as a photo interrupter that detects the rotation of the rotor 5 and a control circuit that outputs a control signal to the air conditioner by a detection signal from the detector. Yes.

  Thus, in the present embodiment, the substrate 8 is formed with a circular hole 8a, and the rotor 5 passes through the circular hole 8a of the substrate 8 and is on the cover 3 side (lower side in FIG. 1). A click mechanism 9 is arranged in the vicinity of the extended end (lower end in FIG. 2). Here, the click mechanism 9 is for imparting a click (moderation feeling) to the rotation of the dial knob 4, and a plurality of click mechanisms 9 are circumferentially provided on the outer periphery of the flange portion 5 </ b> A formed integrally with the extended end of the rotor 5. The formed engaging recess 5a and a bag-like storage case 3A formed integrally with the cover 3 are slidably accommodated in the lateral direction (left-right direction in FIG. A click member 10 that selectively engages with the engaging recess 5a and a spring 11 that is a biasing member that biases the click member 10 toward the engaging recess 5a of the rotor 5 (leftward in FIG. 1). ing.

  In the rotary switch 1 configured as described above, when the operator rotates the dial knob 4, the rotor 5 rotates together with the dial knob 4, and the rotation direction and amount of rotation of the rotor 5 are mounted on the substrate 8. It is detected by a detector (not shown), and the detection signal is transmitted to a control circuit mounted on the substrate 8 to control the air conditioner, thereby adjusting the temperature in the passenger compartment. When the rotor 5 rotates together with the dial knob 4, the click member 10 urged by the spring 11 is selectively engaged with the engagement recesses 5 a formed in the circumferential direction on the outer periphery of the flange portion 5 </ b> A of the rotor 5. Therefore, a click feeling is given to the rotation of the dial knob 4.

  Thus, in the rotary switch 1 according to the present embodiment, the rotor 5 extends through the substrate 8 to the cover 3 side, and the click mechanism 9 is disposed in the vicinity of the extended end. The grease applied to the moving portion (the engaging portion between the engaging recess 5a of the rotor 5 and the click member 10) adheres to the cover 3, but does not adhere to the components arranged around the substrate 3 or the substrate 8. . For this reason, grease does not adhere to electronic components such as a detector and a control circuit mounted on the substrate 8, and the malfunction of the rotary switch 1 due to the adhesion of grease is reliably prevented.

  Further, since the click mechanism 9 is moved from the periphery of the substrate 8 to the cover 3 side and distributed, the mounting area of the substrate 8 is increased, and various electronic components can be rationally arranged on the substrate 8. Can also be obtained.

  In the above, the embodiment in which the present invention is applied to a rotary switch for adjusting the temperature of an air conditioner has been described. However, the present invention is similarly applied to a rotary switch for other arbitrary uses. Of course, it is possible.

DESCRIPTION OF SYMBOLS 1 Rotary switch 2 Body case 3 Cover 3A Cover storage case 4 Dial knob 5 Rotor 5A Rotor flange 5a Rotor engagement recess 6 Dial base 7 Screw 8 Substrate 8a Substrate hole 9 Click mechanism 10 Click member 11 Spring ( (Biasing member)

Claims (2)

In a space formed by a cover that covers the main body case and the opening on the rear surface, a rotor that rotates together with the dial knob, a detector that detects the rotation of the rotor, and a detection signal from the detector controls various devices. In a rotary switch comprising a board on which a control circuit for outputting a signal is mounted and a click mechanism for giving a click feeling to the rotation of the dial knob,
A rotary switch characterized in that the rotor extends through the substrate to the cover side, and the click mechanism is disposed in the vicinity of the extended end. The click mechanism includes a plurality of engagement recesses formed circumferentially at the end of the rotor, a click member that is slidably held by the cover and selectively engages with the engagement recesses, and the click The rotary switch according to claim 1, wherein the rotary switch is configured by a biasing member that biases the member toward the engagement recess.

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