JP4300152B2 - Switch mechanism of rotary operation device - Google Patents

Description

  The present invention relates to a switch mechanism of a rotary operation device used for a heater control device of a vehicle.

  Conventionally, as a heater control device for appropriately adjusting an air control unit for controlling an air conditioning state of a vehicle in a vehicle interior, a gear portion is formed coaxially with a rotary operation knob, and meshes with the gear portion. A device that controls the air control unit by an electric signal that is output by detecting the rotation amount of the interlocking gear with a rotation amount detection switch and adjusting the air conditioning state in the passenger compartment is known.

  The operation panel of this type of heater control device is used to set the control of the air control unit. A case consisting of a front case, a middle case and a back case is formed, and a printed circuit board is formed between the middle case and the back case. A switch which is arranged between them and which operates according to the operation of the rotary operation knob is arranged on the printed circuit board.

  On the other hand, in addition to the heater control device that electrically controls the air control unit as described above, an air control in which the other end of this cable is connected by a cable connected to a rotary gear that is linked to a rotary operation knob. 2. Description of the Related Art A heater control device that adjusts an air condition in a passenger compartment by controlling a unit is known.

  A heater control device equipped with the cable control mechanism as described above, for example, detects the temperature inside the vehicle and turns the air control unit on and off so that it always becomes a comfortable temperature regardless of the rotation operation position of the temperature adjustment operation knob. Since it is desirable to switch, the number of devices equipped with automatic control means for electrically automatically controlling the air control unit temporarily is increasing in recent years regardless of the rotational operation position of the operation knob. As a configuration for automatically controlling the air control unit in such a heater control device, an operation knob for switching the blowing mode and / or an operation knob for setting the temperature in order to detect the currently set blowing mode and / or temperature. There is a device that detects the rotation operation state and automatically controls based on the detection signal.

  As described above, in the heater control device that electrically controls the air control unit, or the heater control device that includes automatic control means that electrically automatically controls and includes the cable control mechanism, the rotary operation knob rotates. In order to detect the position, a switch mechanism is employed in which the interlocking gear is fitted by press-fitting the interlocking gear into the rotation shaft of the rotation amount detection switch.

  The rotation amount detection switch has a part of the circumferential surface of the shaft of the rotating shaft formed into a planar shape, and the longitudinal section has a D-shape, and the interlocking gear is fitted to the D-shaped rotating shaft. In general, a member provided with a D-shaped insertion hole is generally used as the attachment member.

JP 2001-184969 A Japanese Utility Model Publication No. 56-092219 Japanese Utility Model Publication No. 56-148728

  As described above, the structure for attaching the attachment member such as the interlocking gear formed with the D-shaped insertion hole to the D-shaped rotation shaft of the rotation amount detection switch is simple, but the attachment member extends in the axial direction of the rotation shaft. There is a drawback that the mounting member is easily removed from the rotating shaft.

When the attachment member is an interlocking gear, the interlocking gear is attached to the rotation shaft of the rotation amount detection switch, and then the rotation amount detection switch is assembled at a predetermined position while meshing the gear portion of the operation knob and the interlocking gear. At this time, a force acts in the direction in which the interlocking gear comes off from the rotation shaft of the rotation amount detection switch, and the interlocking gear easily comes off from the rotation shaft, or the position of the interlocking gear shifts and the gear portion engages with the interlocking gear. May come off.
In addition, after the rotation amount detection switch is assembled at a predetermined position, the interlocking gear gradually moves away from the rotating shaft during continuous use over a long period of time, and the interlocking gear disengages from the gear portion. May occur.

Therefore, in order to stabilize the force with which the mounting member such as the interlocking gear is pressed against the rotating shaft, a D-shaped metal leaf spring formed separately is conventionally inserted into the insertion hole of the mounting member. However, there are disadvantages in that the man-hour for processing the leaf spring increases and the number of parts increases.
In addition, there is a configuration in which a rib is disposed in the insertion hole of the mounting member, and when the rotation shaft of the rotation amount detection switch is press-fitted into the insertion hole, the rotation shaft is pressed and held by the restoring force of the rib. The ribs may be deformed by repeated insertion / removal or long-term use, and the restoring force may be reduced, the force for press-contacting the rotating shaft may be reduced, rattling may occur, and the mounting member may be detached from the rotating shaft.
In addition, there is a structure in which a pair of elastic pieces is formed on the mounting member and the rotation shaft of the rotation amount detection switch is clamped and held, but rattling occurs during operation of the rotation amount detection switch as in the above configuration. There is a problem that the force of pressing decreases, the attachment member moves in the axial direction with respect to the rotation shaft, or the attachment member comes off.

  On the other hand, conventionally, in a switch mechanism of a rotary operation device in a heater control device that electrically controls an air control unit, a rotation amount detection switch is arranged on a printed circuit board disposed between the middle case and the back case. Therefore, for example, it is not easy to change the position of the rotation amount detection switch, add or remove the rotation detection switch by changing various specifications for each vehicle type, and greatly increase the specifications such as the shape of the printed circuit board and case It is necessary to change to.

  Therefore, an object of the present invention is to provide a switch mechanism for a rotary operation device that can be reliably operated without rattling and can be easily assembled with a small number of parts.

In order to solve the above problems, the present invention includes an operation knob selectable predetermined rotational position is provided on the operation panel, and a base disposed on the rear side of the operation panel, pivotably on the base And a support shaft portion that is fitted to the operation knob and rotatably supports the operation knob on a base, a drive gear formed integrally with the support shaft portion, and adjacent to the drive gear. in the switch mechanism of the rotary operation device provided with an interlocking gear for transmitting to said switch a rotation of the operation knob meshes with the drive gear while being positioned Te, the switch is a plan a part of the circumferential surface A rotatable shaft formed with a flat surface having a shape, a fitting portion having a flat portion corresponding to the flat surface of the shaft, and elastically biasing the shaft, and the shaft to the fitting portion The elastic piece that presses the And mounting the interlocking gear on the shaft, and providing a printed circuit board on which the switch is fixed, and meshing the shaft support portion for pivotally supporting the shaft, the drive gear and the interlocking gear. An opening that exposes a part of the interlocking gear, and a cover that is engaged with the printed circuit board so as to cover the switch and a part of the interlocking gear that is fitted to the switch; A rotary operating device characterized in that a regulating portion is provided on the inner surface of the cover so as to project downward so as to be positioned above the interlocking gear and restrict the movement of the interlocking gear in the axial direction of the shaft . A switch mechanism is proposed.

Further, the elastic piece is provided with a bent portion inclined along the shape of the circumferential surface of the shaft, and the bent portion is formed so as to face the flat portion, whereby the shaft is fitted to the fitting portion. You may comprise so that it may urge in the direction which press-contacts .

Further, the cover may be provided with an engaging claw capable of engaging with the printed board and a screw fixing portion for fixing the cover to the base.

  As is clear from the above description, according to the present invention, the fitting portion that fits with the flat surface of the shaft and the elastic piece that elastically presses against the circumferential surface of the shaft are separately formed. While the mating part is fitted, the elastic part pushes the shaft in the direction in which the flat part of the interlocking gear is pressed against the flat surface of the shaft, so the fitting part reliably transmits the rotational force of the interlocking gear to the shaft. In addition, it is possible to prevent rattling from occurring between the shaft and the interlocking gear.

  In addition, since a fitting part that fits with the shaft and an elastic piece that biases the shaft so as to be in pressure contact with the interlocking gear are formed integrally with the interlocking gear, a separate member such as a D spring is required as in the past. It becomes a simple structure, and it is easy to assemble with one touch, and the number of parts and manufacturing cost can be reduced.

  Further, by forming a pair of elastic pieces and forming a bent portion inclined along the shape of the circumferential surface of the shaft on each of the pair of elastic pieces, the flat surface of the shaft and the flat portion of the interlocking gear are in pressure contact with each other. The shaft is reliably urged in the direction, and at the same time, the pair of elastic pieces urges the shaft in both directions perpendicular to the direction in which the flat surface of the shaft and the flat portion of the interlocking gear are pressed against each other. Therefore, rattling between the shaft and the interlocking gear can be prevented.

  On the other hand, by forming a switch cover that covers a part of the switch and the interlocking gear fitted to the switch, it is possible to cover a part that does not need to be exposed, and when installing the heater control device to the vehicle, It is possible to prevent the interlocking gear from colliding with other parts and being damaged.

  In addition, since the restriction part is formed on the inner surface of the cover, when the switch is assembled to the heater control device, the restriction part abuts the interlocking gear to restrict the movement of the interlocking gear, and the drive gear and the interlocking gear mesh. Can be prevented from being disengaged, and the engagement of the drive gear and the interlocking gear can be prevented from being disengaged during continuous use.

  Moreover, since the unit with the printed circuit board, switch, and cover integrated is attached to the base, it only needs to be aligned with the base once. By making a slight change to the control device and retrofitting the integrated unit, it is possible to change to a cable-controlled heater control device equipped with an automatic control means for automatic automatic control. It is easy to cope with various specifications that differ depending on the type, and the number of parts can be reduced.

  A preferred embodiment of a switch mechanism of a rotary operation device according to the present invention will be described in detail below with reference to the accompanying drawings.

  1 is a front view of a vehicle heater control device to which a switch mechanism of a rotary operation device according to an embodiment of the present invention is applied. FIG. 2 is a cross-sectional view taken along line 1A-1A in FIG. 1 is a rear view of FIG. 1, FIG. 4 is a partially transparent plan view of an essential part of the vehicle heater control device according to the embodiment of the present invention, and FIG. 5 is a gear lever and switch in the vehicle heater control device of FIG. It is the principal part enlarged view which removed the cover and the control cable.

  First, referring to FIGS. 1 and 2, a heater control device 1 for a vehicle has a base body 2 that can be fitted into an instrument panel of the vehicle, and an operation panel 3 is integrally attached to the front surface of the base body 2. ing. A rotary operation knob 4 for switching the air blowing mode is provided on the left side of the operation panel 3, a rotary operation knob 5 for switching temperature is provided on the right side of the front surface, and a rotary type knob for switching air flow is provided in the center of the front surface. The operation knob 6 is provided with a left and right slide type operation knob 7 for switching between inside and outside air at the upper part thereof.

  By turning the rotary operation knob 4 for switching the air blowing mode, various air blowing modes (in the example shown, “face air blowing position”, “face and foot air blowing position”, “foot air blowing position”, “foot and windshield air blowing”). A total of five types of “position” and “front wind blowing position” can be selected. Further, the temperature of the air blown into the passenger compartment can be selected stepwise from low to high by turning the rotary operation knob 5 for temperature switching. Further, by turning the rotary operation knob 6 for switching the air volume, the air volume of the air blown into the vehicle interior can be selected in stages, and by sliding the left / right sliding operation knob 7 for switching the inside / outside air, The air to be introduced can be switched between inside air (vehicle compartment air) and outside air (vehicle compartment outside air).

  The operation panel 3 is further provided with a switch SW1 for turning on / off an air control unit (not shown) and a switch SW2 for removing fogging of the window.

  Of the above-described operation knobs or switches, the temperature-controlled rotary operation knob 5 is connected to the air control unit via a control cable 10 described later, and by rotating the rotary operation knob 5, The air control unit can be adjusted.

  More specifically, referring to FIGS. 2 to 4, on the rear surface side of the base body 2, an operation knob that is fitted with a temperature-controlled rotary operation knob 5 and rotatably supports the rotary operation knob 5. A small-diameter drive gear 8a and a large-diameter drive gear 8b are integrally formed at the rear end portion of the support shaft portion 8, and a substantially sector gear lever having an internal gear 9a meshing with the small-diameter drive gear 8a. 9 is rotatably mounted on a support shaft 2a parallel to the operation knob support shaft portion 8, and is prevented from coming out backward by an elastic locking claw 2b. The support shaft 2 a and the locking claw 2 b are formed integrally with the base body 2.

  The gear lever 9 has a connecting portion 9b for connecting the inner cable 10a of the control cable 10 at one end. When the rotary operation knob 5 is rotated, the operation knob support shaft portion 8 is rotated to drive a small diameter. The gear lever 9 that meshes with the gear 8 a rotates in conjunction with the gear 8 a, and the air control unit can be adjusted via the control cable 10.

  3 to 5, an interlocking gear 11 is provided in the vicinity of the outside of the operation knob support shaft 8, and a predetermined number of gears 11 a mesh with the large-diameter drive gear 8 b of the operation knob support shaft 8. . The interlocking gear 11 is mounted on the switch shaft 12 a of the rotation amount detection switch 12, and the rotation amount detection switch 12 is fixed to the printed board 13. Further, as will be described later, the switch cover 14 covers a part of the rotation amount detection switch 12 and the interlocking gear 11, and the engaging claw 14b is engaged with the printed circuit board 13 and fixed.

  In the heater control device 1 having the above-described configuration, when the rotary operation knob 5 is rotated, the large-diameter drive gear 8b of the operation knob support shaft portion 8 is rotated, whereby the large-diameter drive gear 8b and The interlocking gear 11 to be engaged rotates and the switch shaft 12a to which the interlocking gear 11 is attached rotates, whereby the rotation amount detection switch 12 detects the rotation of the rotary operation knob 5. As a result, the detection signal of the rotation amount detection switch 12 is transmitted from the printed circuit board 13 to the control unit (not shown) of the air control unit through the harness 15 and the connector 16 fixed to the base body 2.

  The air control unit is provided with a sensor (not shown) for detecting the temperature of the air sent to the passenger compartment, and this sensor is connected to the control unit of the air control unit. The set temperature in the vehicle interior desired by the operator in the vehicle interior is detected by the rotation amount detection switch 12, and the set temperature and the air temperature detected by the sensor are compared in the control unit of the air control unit. Control is performed to make the temperature experienced by the operator in the passenger compartment comfortable.

  The configuration of the rotation amount detection switch 12 will be described in more detail with reference to FIGS. 6A is a front view of the interlocking gear 11 provided in the rotation amount detection switch 12, FIG. 6B is a side view of FIG. 6A, and FIG. 7A is a rotation amount detection switch of the interlocking gear 11. FIG. 7B is a partially transparent side view of FIG. 7A, FIG. 8A is a front view of the switch cover 14, and FIG. 8B is FIG. FIG. 8 (c) is a bottom view of FIG. 8 (a), FIG. 9 (a) is an enlarged view of the main part of FIG. 3, and FIG. 9 (b) is 9B- of FIG. 9 (a). It is sectional drawing along a 9B line.

The structure of the interlocking gear 11 according to the embodiment of the present invention will be described with reference to FIGS. 6 (a) to 6 (b). As described above, the interlocking gear 11 is formed with a predetermined number of gears 11 a that mesh with the large-diameter drive gear 8 b of the operation knob support shaft 8. A substantially concave fitting portion 11b that fits with the switch shaft 12a and a pair of elastic pieces 11c and 11d that are elastically pressed against the circumferential surface 12b of the switch shaft 12a are formed.
The switch shaft 12a is held while being pressed between the fitting portion 11b and the pair of elastic pieces 11c and 11d. The elastic pieces 11c and 11d are formed with bent portions 11e and 11f that are inclined so as to follow the shape of the circumferential surface 12b of the switch shaft 12a. Further, the switch shaft 12a is formed with a flat flat surface 12c on a part of the circumferential surface, and the fitting portion 11b of the interlocking gear 11 is formed with a flat portion 11g corresponding to the flat surface 12c. ing. Further, an abutting portion 11h that abuts against the abutting portion 12d formed on the switch shaft 12a is formed. As shown in FIG. 6B, the fitting portion 11b, the elastic pieces 11c and 11d, and the abutting portion 12d are formed so as to protrude from the surface of the interlocking gear 11.

  The operation in a state where the interlocking gear 11 is mounted on the rotation amount detection switch 12 will be described with reference to FIGS. 7 (a) to 7 (b). In the interlocking gear 11 mounted on the switch shaft 12a, the flat surface portion 11g of the fitting portion 11b contacts the flat surface 12c of the switch shaft 12a, and the fitting portion 11b is a part of the circumferential surface 12b of the switch shaft 12a. Is fitted to the switch shaft 12a. Further, the bent portions 11e and 11f formed in the pair of elastic pieces 11c and 11d are in close contact with and in pressure contact with the circumferential surface 12b of the switch shaft 12a, and the switch shaft 12a is connected to the bent portions 11e and 11f of the elastic pieces 11c and 11d. Thus, the flat portion 11e of the interlocking gear 11 and the flat surface 12c of the switch shaft 12a are urged in the direction of arrow A so as to be in pressure contact with each other.

Here, one elastic piece 11c of the pair of elastic pieces 11c, 11d urges the circumferential surface 12b of the switch shaft 12a in the direction of arrow A and simultaneously urges it in the direction of arrow B, and the other elastic piece 11d The circumferential surface 12b of the switch shaft 12a is urged in the direction of arrow A and simultaneously urged in the direction of arrow C. That is, the switch shaft 12a is urged in the direction of arrow A and pressed against the flat surface portion 11g of the interlocking gear 11, and at the same time is urged in both directions of the arrow B direction and the arrow C direction. There is no bias in either direction. That is, when a force biased in the direction of arrow B acts on the switch shaft 12a, the elastic piece 11d pushes back in the direction of arrow C. Similarly, when a force biased in the direction of arrow C acts on the switch shaft 12a, the elastic piece It is pushed back in the direction of arrow B by 11c.
As a result, the rotational force of the interlocking gear 11 is reliably transmitted from the fitting portion 11b of the interlocking gear 11 to the switch shaft 12a, and the occurrence of rattling between the switch shaft 12a and the interlocking gear 11 is prevented. Can do.

  Further, since the fitting portion 11b that fits with the switch shaft 12a and the elastic pieces 11c and 11d that urge the interlocking gear 11 so as to be in pressure contact with the switch shaft 12a are formed integrally with the interlocking gear 11, Thus, it becomes a simple structure without requiring another member such as a D spring, it is easy to assemble with one touch, and the number of parts and the manufacturing cost can be reduced.

  Furthermore, unlike the conventional structure, the elastic piece 11c (11d) is not held by the switch shaft 12a while sandwiching the switch shaft 12a from both opposing directions, but one is fitted in the fitting portion 11b and from the direction facing the fitting portion 11b. Since the switch shaft 12a is urged so as to come into pressure contact with the fitting portion 11b, the strength of the interlocking gear 11 is high, the occurrence of rattling can be prevented, and the rotational force of the interlocking gear 11 is fitted. It can be set as the structure transmitted from the part 11b to the switch shaft 12a reliably.

  Next, the structure of the switch cover 14 according to the embodiment of the present invention will be described in detail with reference to FIGS. 8 (a) to 8 (c). Note that, by providing the switch cover 14 so as to cover a part of the rotation amount detection switch 12 and the printed circuit board 13, even when the rotation amount detection switch 12 is arranged in a state of being exposed to the base body 2, the heater control device 1. Can be prevented when the rotation amount detection switch 12 or the interlocking gear 11 hits other parts and is damaged.

  The switch cover 14 has a shaft support portion 14a that pivotally supports the switch shaft 12a through the switch shaft 12a, an engagement claw 14b that engages the printed circuit board 13 to which the rotation amount detection switch 12 is connected, A screw insertion hole 14c for screwing and fixing the switch cover 14 to the base body 2 together with the substrate 13 and a large-diameter drive gear 8b of the operation knob support shaft 8 and the interlock gear 11 can be engaged with each other. 14d which exposes a portion. Further, on the inner surface of the upper portion of the switch cover 14, there is formed a regulation rib 14e that comes into contact with the interlocking gear 11 when the interlocking gear 11 moves in the direction of removal from the switch shaft 12a (the direction of arrow D in FIG. 7B). Yes.

  With reference to FIG. 9A to FIG. 9B, a structure for assembling the rotation amount detection switch 12 to the base body 2 according to the embodiment of the present invention will be described. When the switch cover 14 is assembled to the rotation amount detection switch 12 and the printed board 13 with the interlocking gear 11 attached, first, the switch shaft 12a of the rotation amount detection switch 12 is passed through the shaft support portion 14a of the switch cover 14. The switch cover 14 is fixed to the printed circuit board 13 by engaging the engaging portion 13 a formed on the printed circuit board 13 and the engaging claw 14 b of the switch cover 14. At this time, even when the position of the interlocking gear 11 is shifted in the direction of detaching from the switch shaft 12a (the direction of arrow D in FIG. 7B), the interlocking gear 11 contacts the restriction rib 14e of the switch cover 14, The interlocking gear 11 is pressed in the direction of arrow E in FIG. 9B, and the interlocking gear 11 is returned to a position where it can mesh with the large-diameter drive gear 8b.

  Thus, after the rotation amount detection switch 12, the printed circuit board 13, and the switch cover 14 are integrated, a screw insertion hole (not shown) of the fixing portion 2c formed in the base body 2 and a screw insertion hole 14c of the switch cover 14 Are assembled to the base body with screws 17. In this way, the printed circuit board 13, the rotation amount detection switch 12 and the switch cover 14 are screwed to the base body 2 with the screws 17, so that the interlocking gear 11 is moved relative to the large-diameter drive gear 8 b of the operation knob support shaft 8. It can be positioned and fixed reliably.

  At this time, the assembling work is performed while meshing the interlocking gear 11 and the large-diameter drive gear 8b, but a force acts in the direction in which the interlocking gear 11 is removed from the switch shaft 12a (the direction of arrow D in FIG. 7B). It will be. However, the regulating rib 14e of the switch cover 14 prevents the interlocking gear 11 from moving, and the interlocking gear 11 moves and moves out of the meshing position with the large-diameter drive gear 8b, or comes off the switch shaft 12a. Can be prevented.

  As described above, since the unit in which the printed circuit board 13, the rotation amount detection switch 12 and the switch cover 14 are integrated is attached to the base body 2, the positioning with respect to the base body 2 can be performed only once, and the assembly work can be performed. It becomes easy.

  Further, in the conventional rotary operation type heater control device by cable control, if the fixing portion 2c is formed in the base body and slight changes are made so that the harness 15 and the connector 16 can be held, By retrofitting a unit in which the rotation amount detection switch 12 and the switch cover 14 are integrated, it is possible to change to a cable-controlled heater control device equipped with automatic control means for automatic automatic control. Further, the rotary control heater control device is not limited to the above described cable control, and any rotary control heater control device can be attached. That is, it becomes easy to cope with various specifications that differ depending on the type of car with a slight design change, and the number of parts can be reduced.

  Although the embodiments have been described above, the present invention is not limited only to the embodiments described above, and various modifications can be made to the components within the scope described in the claims.

  For example, the rotation amount detection switch 12 to which the present invention is applied is not limited to one that operates in conjunction with the temperature control rotary operation knob 5. For example, the rotation operation knob 4 for air blowing mode switching or the air flow switching It may be interlocked with a rotary operation knob such as the rotary operation knob 6.

  In the embodiment of the present invention, the pair of elastic pieces 11c and 11d is formed, but a structure including a plurality of elastic pieces may be used. Or it is good also as a structure which can be urged | biased in the multiple places on the circumferential surface 12b of the switch shaft 12a with one elastic piece.

  Furthermore, in the embodiment of the present invention, the regulation rib 14e is formed on the upper inner surface of the switch cover 14 in order to regulate the movement of the interlocking gear 11. However, the shaft support part 14a of the switch shaft 12a formed on the switch cover 14 is interlocked. It is good also as a structure which serves as the role of the control part which controls the movement of the gear 11. FIG.

1 is a front view of a vehicle heater control device to which a switch mechanism of a rotary operation device according to an embodiment of the present invention is applied. It is sectional drawing along the 1A-1A line of the heater control apparatus shown in FIG. It is a rear view of the heater control apparatus shown in FIG. FIG. 3 is an enlarged partial plan view of a main part of the vehicle heater control device according to the embodiment of the present invention. It is the principal part enlarged view which removed the gear lever, the switch cover, and the control cable of the heater control apparatus shown in FIG. 6A is a front view of the interlocking gear 11 provided in the rotation amount detection switch 12, and FIG. 6B is a side view of FIG. 6A. FIG. 7A is a front view showing a state in which the interlocking gear 11 is assembled to the rotation amount detection switch 12, and FIG. 7B is a partially transparent side view of FIG. 7A. 8A is a front view of the switch cover 14, FIG. 8B is a side view of FIG. 8A, and FIG. 8C is a bottom view of FIG. 8A. 9A is an enlarged view of the main part of FIG. 3, and FIG. 9B is a cross-sectional view taken along line 9B-9B of FIG. 9A.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle heater control apparatus 2 Base body 2c Fixed part 3 Operation panel 5 Rotary operation knob for temperature switching 8 Operation knob support shaft part 8a Small diameter drive gear 8b Large diameter drive gear 9 Gear lever 9a Inscribed gear 10 Control cable DESCRIPTION OF SYMBOLS 11 Interlocking gear 11b Fitting part 11c Elastic piece 11d Bending part 11e Plane part 12 Rotation amount detection switch 12a Switch shaft 12b Circumferential surface 12c Flat surface 13 Printed circuit board 14 Switch cover 14a Shaft support 14b Engagement claw 14c Screw insertion hole 14d Opening Part 14e Restriction rib (regulation part)

Claims (3)

A switch,
An operation knob provided on the operation panel and capable of selecting a predetermined rotation position;
A base disposed on the rear side of the operation panel,
A support shaft that is pivotally supported by the base, is fitted to the operation knob, and rotatably supports the operation knob on the base;
A drive gear formed integrally with the support shaft;
In the switch mechanism of the rotary operation device provided with an interlocking gear for transmitting the rotation of the operation knob to the switch meshes with the drive gear while being positioned adjacent to the drive gear,
The switch has a rotatable shaft in which a planar flat surface is formed on a part of a circumferential surface ,
The interlocking gear includes a fitting portion having a flat portion corresponding to the flat surface of the shaft, and an elastic piece that elastically biases the shaft and presses the shaft against the fitting portion. Is attached to the shaft,
Providing a printed circuit board to which the switch is fixed;
A shaft supporting portion that pivotally supports the shaft; and an opening that exposes a part of the interlocking gear so that the drive gear and the interlocking gear can be engaged with each other, and is fitted to the switch and the switch. A cover engaged with the printed circuit board so as to cover a part of the interlocking gear,
A rotary operating device characterized in that a regulating portion is provided on an inner surface of the cover so as to project downward so as to be positioned above the interlocking gear and restrict movement of the interlocking gear in the axial direction of the shaft . Switch mechanism. The elastic piece is provided with a bent portion inclined along the shape of the circumferential surface of the shaft, and the bent portion is formed so as to face the flat portion, thereby pressing the shaft against the fitting portion. The switch mechanism of the rotary operation device according to claim 1, wherein the switch mechanism is biased in the direction of movement. The rotary type according to claim 1 or 2, wherein the cover is provided with an engaging claw capable of engaging with the printed board and a screw fixing portion for fixing the cover to the base. Switch mechanism of the operating device.

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