JP2013114841A - Rotation detection mechanism of switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation detection mechanism of a switch device which can reliably detect rotation of an operation knob and allows size reduction of the switch device.SOLUTION: A rotation detection mechanism of a switch device 1 comprises: an operation knob 3; a rotor 8 which has a plurality of drive pieces 8a and rotates in conjunction with the rotational operation of the operation knob 3; a rotation detection switch 14 which detects the rotation amount and rotation direction of the operation knob 3 when a moving piece 14a is operated by making contact with the drive pieces 8a of the rotor 8; a substrate 13; a terminal base 12 attached to a case 2 in a state making contact with the rotor 8; and a spring (biasing means) 9 which biases the rotor 8 in a direction to make contact with the terminal base 12. The rotor 8 is held to the case 2 in a manner slidable in a rotational axis direction of the operation knob 3. At the same time, protrusions 8b and 12c which protrude in the rotational axis direction of the operation knob 3 and can be engaged with each other are provided on the rotor 8 and the terminal base 12, respectively.

Description

  The present invention relates to a rotation detection mechanism of a switch device provided with a rotation detection switch that detects a rotation amount and a rotation direction of an operation knob.

  A switch device provided in a vehicle or the like includes a rotary push type in which a plurality of preset modes are selected by rotating an operation knob and the mode is determined by pressing the operation knob.

  Such a switch device includes a rotation detection switch that employs a two-way, three-contact system, and a moving piece of the rotation detection switch is applied to a plurality of drive pieces formed at predetermined intervals on the periphery of the end of the operation knob. A method of detecting the amount of rotation and the direction of rotation of the operation knob based on the number and direction of passage of the drive piece with respect to the moving piece by operating in contact with each other is adopted (for example, see Patent Document 1).

Japanese Patent No. 4066037

  However, if the diameter of the operation knob is reduced, for example, in order to meet the demand for miniaturization of the switch device, the distance between the drive pieces is reduced, so that the movable piece of the rotation detection switch cannot be moved to a detectable level. A problem occurs. In order to solve such a problem, a configuration in which an intermediate transmission mechanism including an intermediate member such as a cam is provided is also conceivable. However, in such a configuration, the number of parts increases, the structure becomes complicated, the cost is increased, and the assembling property is increased. There is a possibility that the problem of deteriorating the quality of the product may occur.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotation detection mechanism of a switch device capable of downsizing the switch device while reliably detecting the rotation of the operation knob. There is.

In order to achieve the above object, the invention according to claim 1
An operation knob rotatably provided on the case;
A rotor having a plurality of driving pieces and rotatably provided in the case and rotating in conjunction with a rotation operation of the operation knob;
A rotation detection switch that detects a rotation amount and a rotation direction of the operation knob by operating a moving piece in contact with the driving piece of the rotor;
A substrate to which the rotation detection switch is attached;
A terminal base connected to the substrate and outputting an electrical signal from the rotation detection switch to an external device is integrally held, and a terminal base attached to the case in contact with the rotor;
Biasing means for biasing the rotor in a direction in contact with the terminal base;
In the rotation detection mechanism of the switch device having
The rotor is slidably held in the rotation axis direction of the operation knob with respect to the case, and the rotor and the terminal base have protrusions that protrude in the rotation axis direction of the operation knob and can be engaged with each other. Each is formed.

  According to a second aspect of the present invention, in the first aspect of the present invention, the drive piece is formed in the vicinity of the outer peripheral edge of the rotor.

  The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the number of any one of the protrusions formed on the rotor and the terminal base is the same as the number of the drive pieces. To do.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the case includes a housing portion that houses a steel ball and a biasing member that biases the steel ball, The rotor is formed with a detent portion that contacts the steel ball and positions the operation knob in the rotational direction.

  According to the first aspect of the present invention, the rotor is slidably held in the direction of the rotation axis of the operation knob with respect to the case, and the protrusions engageable with each other are formed on the rotor and the terminal base. Because the rotor drive piece and the rotation detection switch moving piece can be moved away from the rotation axis of the operation knob at the timing of turning the knob to turn the rotation detection switch ON / OFF. Even when the interval between the drive pieces is narrowed, the moving piece of the rotation detection switch that has been turned on can be moved to the neutral position to reliably cancel it, thereby reducing the size of the switch device. it can.

  Further, even if the rotor slides in the direction of the rotation axis of the operation knob, if the operation knob does not follow this sliding, the user will not feel uncomfortable with the operation.

  According to the second aspect of the present invention, since the drive piece is formed in the vicinity of the outer peripheral edge having the largest diameter of the rotor, the interval between the drive pieces can be increased as much as possible.

  According to the third aspect of the present invention, since either one of the protrusions formed on the rotor and the terminal base is the same as the number of driving pieces, the driving piece of the rotor passes the moving piece of the rotation detection switch once. Each time the rotor is moved, the rotor can be slid so as to approach / separate from the moving piece, and the rotation of the operation knob can be reliably detected at all the rotation detection positions.

  According to the invention of claim 4, the urging direction of the urging member that urges the steel ball toward the detent portion of the rotor, and the urging direction of the urging member that urges the rotor toward the terminal base By setting in the same direction, the urging force of the urging member that urges the steel ball can be used for urging the rotor.

It is an exploded sectional view of a switch device provided with a rotation detection mechanism concerning the present invention. It is sectional drawing of a switch apparatus provided with the rotation detection mechanism which concerns on this invention. It is action | operation explanatory drawing of the rotation detection mechanism which concerns on this invention. It is a front view of the rotor of a switch apparatus provided with the rotation detection mechanism which concerns on this invention. It is a top view of the rotor of a switch apparatus provided with the rotation detection mechanism which concerns on this invention. It is a bottom view of the rotor of a switch apparatus provided with the rotation detection mechanism which concerns on this invention. It is the sectional view on the AA line of FIG.

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

  1 is an exploded sectional view of a switch device provided with a rotation detection mechanism according to the present invention, FIG. 2 is a sectional view of the switch device, FIG. 3 is an operation explanatory view of the rotation detection mechanism according to the present invention, and FIG. 5 is a plan view of the rotor, FIG. 6 is a bottom view of the rotor, and FIG. 7 is a cross-sectional view taken along line AA of FIG.

  The switch device 1 according to the present embodiment is of a rotary push type, and an operation knob 3 is rotatable and vertically movable inside a cylindrical portion 2A formed at the upper end portion of the cylindrical case 2 thereof. Are slidably fitted and held. A cylindrical portion 3A is integrally formed downward in the center of the operation knob 3, and a plurality of engagement holes 3a are formed in the lower portion of the cylindrical portion 3A.

  A shaft 4 disposed below the operation knob 3 is fitted and held in the cylindrical portion 2A of the case 2 so as to be slidable up and down. The shaft 4 is integrally formed in a double cylinder shape, and an engagement claw 4a formed on the inner periphery of the upper end part engages with the engagement hole 3a formed in the cylinder part 3A of the operation knob 3. Accordingly, the shaft 4 is connected to the operation knob 3, and an annular Y ring 5 is interposed between the shaft 4 and the operation knob 3. A plurality of engaging claws 4 b are integrally formed on the lower outer periphery of the shaft 4.

  A bottomed cylindrical slider 6 having an open top is fitted and held on the lower outer periphery of the shaft 4 so as to be slidable in the vertical direction. The slider 6 is long in the vertical direction formed on the upper part. The engaging claws 4b formed on the lower outer periphery of the shaft 4 are engaged with the plurality of engaging holes 6a so as to be slidably connected to the shaft 4 in the vertical direction.

  The slider 6 can slide up and down within a long hole-like engagement hole 6 a formed in the slider 6 within a range in which the engagement claw 4 b of the shaft 4 can move. It is always urged downward by a spring 7 which is a urged member that has been mounted.

  Further, a rotor 8 is arranged on the outer peripheral side of the shaft 4 and the slider 6 in the case 2 so as to be rotatable and slidable up and down. Here, as shown in FIGS. 4 to 7, the rotor 8 is integrally formed in a shape in which the cylindrical portion 8 </ b> B stands vertically at the center of the upper surface of the disc-shaped flange portion 8 </ b> A. Therefore, the rotor 8 rotates integrally with the shaft 4 and is held so as to be slidable relative to the shaft 4 in the vertical direction.

  In the vicinity of the outer peripheral edge of the lower surface of the flange portion 8A of the rotor 8, a plurality (18 in this embodiment) of driving pieces 8a are radially formed as shown in FIGS. On the outer peripheral edge of the lower surface of the flange portion 8A, the same number (18) of protrusions 8b and recesses 8c as the drive pieces 8a are formed at equal intervals in the circumferential direction. Further, in the vicinity of the outer peripheral edge of the upper surface of the flange portion 8A, the same number (18) of triangular mountain-shaped detent portions 8d as the drive pieces 8a are integrally formed at equal intervals in the circumferential direction.

  Thus, as shown in FIG. 2, the rotor 8 is incorporated in the case 2 in a state of being fitted to the outer periphery of the shaft 4 and the slider 6, but the rotor 8 is mounted between the shaft 4 and the shaft 4. It is always biased downward by a spring 9 which is the biasing means.

  Incidentally, as shown in FIG. 2, the case 2 is formed with a plurality of accommodating portions 2 a that open downward, and each accommodating portion 2 a has a steel ball 10 and this facing the detent portion 8 d of the rotor 8. A spring 11 that is an urging member for urging is accommodated.

  As shown in FIG. 2, the terminal base 12 is fitted and fixed to the lower part of the case 2. The terminal base 12 is integrally composed of a substrate holding portion 12A fitted into the case 2 and a coupler portion 12B protruding from the substrate holding portion 12A toward the outside of the case 2, and a lower portion of the substrate holding portion 12A. The terminal base 12 is assembled and fixed to the case 2 by engaging a plurality of engaging claws 12 a formed on the outer periphery with a plurality of engaging holes 2 b formed in the lower part of the case 2.

  Thus, a disk-shaped substrate 13 is installed on the substrate holding portion 12A of the terminal base 12, and a rotation detection switch 14 is mounted at a position off the center of the substrate 13, and the center position of the substrate 13 is set. A pressure detection switch 15 is mounted in the vicinity. The rotation detection switch 14 is a known two-way, three-contact switch, and is provided with a moving piece 14a that tilts when the driving piece 8a of the rotor 8 comes into contact therewith. An ON / OFF signal is output by tilting.

  By the way, a plurality of metal terminals 16 bent in a crank shape are integrally inserted and held in the board holding portion 12A of the terminal base 12, and one end of each terminal 16 stands up and passes through the board 13. Thus, the other end of each terminal 16 extends vertically downward and faces the coupler portion 12B of the terminal base 12.

  In addition, a plurality (three in this embodiment) of protrusions 12c are integrally formed upward on the upper end surface of the cylindrical portion 12b that stands vertically from the outer periphery of the substrate holding portion 12A of the terminal base 12. ing. Here, since the rotor 8 is always biased downward by the spring 9, the protrusion 8b or the recess 8c formed on the lower surface of the flange portion 8A is selectively engaged with the protrusion 12c of the terminal base 12. Match.

  Next, the operation of the switch device 1 configured as described above will be described.

  When the operation knob 3 is rotated in any direction, the rotation is transmitted to the rotor 8 through the shaft 4 and the rotor 8 rotates. When the rotor 8 rotates in this way, the drive piece 8a formed on the lower surface of the flange portion 8A comes into contact with the moving side 14a of the rotation detection switch 14, and the moving piece 14a tilts as shown by a broken line in FIG. Then, the rotation detection switch 14 is turned ON, and an ON signal is output from the substrate 13 to the external device (not shown) via the terminal 16. Thus, when the drive piece 8a of the rotor 8 contacts the moving piece 14a of the rotation detection switch 14, the recess 8c formed on the lower surface of the flange portion 8A of the rotor 8 engages with the protrusion 12c of the terminal base 12. Therefore, the rotor 8 is depressed at the lower limit as shown in FIG. For this reason, the drive piece 8a of the rotor 8 can be surely brought into contact with the moving piece 14a of the rotation detection switch 14 and tilted, and the rotation detection switch 14 outputs an ON signal.

  Then, when the operation knob 3 further rotates and the protrusion 8b formed on the lower surface of the flange portion 8A of the rotor 8 engages with the protrusion 12c of the terminal base 12, the rotor 8 is moved to the spring 9 as shown in FIG. , 11 lifts upward by L as shown in the figure, so that the drive piece 8a formed on the rotor 8 also moves upward. For this reason, the moving piece 14a of the rotation detecting switch 14 can return to the neutral position as shown by the solid line in FIG. 3 without interfering with the driving piece 8a of the rotor 8, and the moving piece 14a is surely canceled. Then, an OFF signal is output from the rotation detection switch 14. The operation knob 3 is positioned when the steel ball 10 urged by the spring 11 is engaged with the detent portion 8d of the rotor 8, and a click feeling is given to the rotation operation.

  Thus, the rotation amount of the operation knob 3 is detected based on the number of ON / OFF signals output from the rotation detection switch 14 as the moving piece 14a of the rotation detection switch 14 is tilted, and depending on the type of the ON / OFF signal. The rotation direction of the operation knob 3 is detected.

  In the present embodiment, the three protrusions 12c are formed on the terminal base 12. However, the number of protrusions 12c on the terminal base 12 is reduced with respect to the number (18) of the protrusions 8b on the rotor 8. As a result, the frictional force due to the engagement between the two can be kept small, so that the force for operating the operation knob 3 can be light and the structure can be simplified.

  Next, when the operation knob 3 is pressed, the shaft 4 and the slider 6 together with the operation knob 3 are pressed downward while compressing the springs 7 and 9, and the pressure detection switch 15 is pressed by the slider 6. The press detection switch 15 operates, and the signal is output from the substrate 13 to the external device (not shown) through the terminal 16. At this time, since the shaft 4 and the slider 6 pass through the center of the rotor 8, no operating force is applied to the rotor 8 when the operating knob 3 is pressed, and the rotor 8 is maintained in an immobile state. . Further, since the slider 6 is slidably held in the vertical direction with respect to the shaft 4, and the spring 7 is contracted between the two, an excessive operating force does not act on the pressure detection switch 15, and the pressure detection is performed. The switch 15 is protected from excessive operating force, and its damage is prevented.

  As described above, according to the present invention, the rotor 8 is held so as to be slidable in the vertical direction (the rotation axis direction of the operation knob 3) with respect to the case 2, and the rotor 8 and the terminal base 12 are engaged with each other. Since the possible protrusions 8b and 12c are respectively formed, the drive piece 8a of the rotor 8 and the moving piece 14a of the rotation detection switch 14 are switched at the timing when the operation knob 3 is rotated to switch ON / OFF of the rotation detection switch 14. The rotation detection switch can be turned on even when the distance between the drive pieces 8a can be reduced by decreasing the diameter of the rotor 8 and by moving away from the vertical direction (the rotation axis direction of the operation knob 3) by L as shown in FIG. The 14 movable pieces 14a can be moved to the neutral position to cancel the movement reliably, and the switch device 1 can be downsized. Even if the rotor 8 slides in the vertical direction (the rotation axis direction of the operation knob 3), since the operation knob 3 does not follow this sliding, the user does not feel uncomfortable with the operation.

  Further, according to the present invention, since the drive piece 8a is formed in the vicinity of the outer peripheral edge having the largest diameter of the rotor 8, the interval between the drive pieces 8a can be increased as much as possible.

  Furthermore, in this embodiment, since the number of protrusions 8b formed on the rotor 8 is the same as that of the drive pieces 8a, every time the drive piece 8a of the rotor 8 passes the moving piece 14a of the rotation detection switch 14 once. The rotor 8 can be slid so as to approach / separate from the moving piece 14a, and the rotation of the operation knob 3 can be reliably detected at all the rotation detection positions.

  Further, according to the present invention, the biasing direction of the spring 11 that biases the steel ball 10 toward the detent portion 8 d of the rotor 8 and the biasing direction of the spring 9 that biases the rotor 8 toward the terminal base 12 are achieved. Therefore, the biasing force of the spring 11 that biases the steel ball 10 can be used for biasing the rotor 8.

  Although the present invention has been described with respect to a mode in which the present invention is applied to a rotary push type switch device, the present invention is naturally applicable to other arbitrary types of switch devices as well. is there.

DESCRIPTION OF SYMBOLS 1 Switch apparatus 2 Case 2A Case cylindrical part 2a Case accommodating part 2b Case engagement hole 3 Operation knob 3A Operation knob cylindrical part 3a Operation knob engagement hole 4 Shaft 4a, 4b Shaft engagement claw 5 Y ring 6 Slider 6a Slider engagement hole 7 Spring (biasing member)
8 Rotor 8A Rotor flange portion 8B Rotor cylindrical portion 8a Rotor drive piece 8b Rotor protrusion 8c Rotor recess 8d Rotor detent portion 9 Spring (biasing member)
10 Steel ball 11 Spring (biasing member)
DESCRIPTION OF SYMBOLS 12 Terminal base 12A Terminal base board holding | maintenance part 12B Terminal base coupler part 12a Terminal base engaging claw 12b Terminal base cylindrical part 12c Terminal base protrusion 13 Substrate 14 Rotation detection switch 14a Moving piece of rotation detection switch 15 Press detection switch 16 terminal

Claims (4)

An operation knob rotatably provided on the case;
A rotor having a plurality of driving pieces and rotatably provided in the case and rotating in conjunction with a rotation operation of the operation knob;
A rotation detection switch that detects a rotation amount and a rotation direction of the operation knob by operating a moving piece in contact with the driving piece of the rotor;
A substrate to which the rotation detection switch is attached;
A terminal base connected to the substrate and outputting an electrical signal from the rotation detection switch to an external device is integrally held, and a terminal base attached to the case in contact with the rotor;
Biasing means for biasing the rotor in a direction in contact with the terminal base;
In the rotation detection mechanism of the switch device having
The rotor is slidably held in the rotation axis direction of the operation knob with respect to the case, and the rotor and the terminal base have protrusions that protrude in the rotation axis direction of the operation knob and can be engaged with each other. A rotation detection mechanism for a switch device, characterized in that each is formed.   The rotation detection mechanism of the switch device according to claim 1, wherein the driving piece is formed in the vicinity of an outer peripheral edge of the rotor.   The rotation detection mechanism of the switch device according to claim 1 or 2, wherein the number of any one of the protrusions formed on the rotor and the terminal base is the same as the number of the driving pieces. A detent portion for forming a housing portion for housing a steel ball and a biasing member for biasing the steel ball in the case and positioning the operation knob in the rotational direction by contacting the steel ball on the rotor The rotation detection mechanism of the switch device according to any one of claims 1 to 3, wherein

Images