JP2005251691A - Rotation operation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation operation device, of which operation resistance shall not differ with rotation angles even if surface conditions (friction coefficients) of a rotating body differ from place to place. <P>SOLUTION: The rotation device is structured by including a pedestal 1, a rotating body 6 supported by the pedestal in free rotation, a friction resistance transferring member 9 with which the rotating body 6 is to be in contact in free sliding, and second elastic members 12 having the friction resistance transferring member in contact with the rotating body 6. The rotating body is composed of a disciform flange part 31 and an axis part set at a center part of the flange part 31, with the friction resistance transferring member 9 in contact with the flange part 31 of the rotating body 31, and a plurality of the second elastic members 12 are aligned in an equal interval around the axis part 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary operation device for operating a rotary operation type electrical component such as a rotary switch or a rotary volume, and more particularly to a means for improving the operational feeling of a rotating body.

  Conventionally, a rotating plate that is rotatably provided in the casing and rotates around the rotation shaft, a fixed plate that is provided in the casing and faces the rotating plate, and a friction between the rotating plate and the fixing plate. There is known a rotary operation type electric component that has one coil spring that applies force and adjusts the rotational torque of the rotary shaft by a frictional force acting between the rotary plate and the fixed plate (for example, (See Patent Document 1).

According to this rotary operation type electrical component, it is possible to give an appropriate rotational resistance based on the frictional force acting between the rotary plate and the fixed plate to the operation of the rotary shaft. Can be a thing.
Japanese Utility Model Publication No. 06-017202

  However, the rotary operation type electric component according to the conventional example includes only one coil spring wound around the rotation shaft as an elastic member for applying a frictional force between the rotation plate and the fixed plate. Therefore, the elastic force of the coil spring applied to the rotating plate tends to be biased in one direction, and if the surface state (coefficient of friction) of the rotating body varies depending on the location, the operating resistance varies depending on the rotation angle, and the operator feels uncomfortable. There was a problem of end.

  The present invention has been made to solve such deficiencies of the prior art, and the object thereof is to prevent the operation resistance from being different depending on the rotation angle even if the surface state (friction coefficient) of the rotating body varies depending on the location. It is to provide a rotary operation device.

  In order to solve the above problems, the present invention comprises a base, a disc-shaped flange and a shaft provided at the center of the flange, and a rotating body rotatably supported by the base. An annular frictional resistance imparting member that is supported so as to be reciprocally movable in the axial direction and elastically urged against the collar part, and an elastic member that elastically contacts the frictional resistance imparting member to the collar part of the rotating body. In the rotary operation device, the frictional resistance applying member is brought into contact with the flange portion of the rotating body, and a plurality of the elastic members are equally arranged around the shaft portion.

  In this way, when a plurality of elastic members are equally arranged around the shaft portion, the elastic force applied to the rotating body is made uniform without being biased in one direction, so the surface state (friction coefficient) of the rotating body However, the operation resistance does not vary depending on the rotation angle even if the position varies depending on the location, and the operational feeling of the rotating body can be improved.

  Further, according to the present invention, in the rotary operation device having the above configuration, the rotating body, the frictional resistance imparting member, and the elastic member are attached to a hollow cylindrical portion formed on the base and an open end of the cylindrical portion. The frictional resistance imparting member is housed in a space formed by the lid member formed, and the frictional resistance imparting member includes a friction plate abutting against the flange portion of the rotating body and a plurality of latches erected from the upper surface of the friction plate And a locking claw formed at the tip of the locking member is locked to a locking claw engaging portion provided on the lid member so that the lid member can be moved up and down. The elastic member is snap-coupled, and the elastic member is set between the snap-fitted frictional resistance applying member and the lid member.

  As described above, when the frictional resistance applying member is provided with a plurality of locking members and can be snap-coupled to the lid member, the elastic member is disposed between the frictional resistance applying member and the lid member, and the lid member is elastic member. Since the assembly of the frictional resistance applying member, the lid member, and the elastic member can be completed simply by pressing the frictional resistance applying member against the elastic force, the assembly of the rotary operation device is improved. be able to.

  Further, according to the present invention, in the rotational operation device having the above-described configuration, the frictional resistance imparting member is configured with a resin molded product, and radial ribs are formed on the rotating body contact surface of the frictional resistance imparting member.

  As described above, when the radial rib is formed on the rotating member contact surface of the frictional resistance applying member, the planar accuracy of the rotating member contact surface is improved compared to the case where the rotating member contact surface of the frictional resistance applying member is formed in a flat shape. Since it can be made higher, the frictional force acting between the rotating body and the frictional resistance imparting member can be made more uniform in the circumferential direction of each of these members, and the operating feeling of the rotating body can be improved. Can be.

  According to the present invention, in the rotary operation device having the above-described configuration, the frictional resistance applying member is formed of a resin molded product, and the radial rib and the outer periphery of the radial rib are connected to the rotating body contact surface of the frictional resistance applying member. An annular rib is formed.

  In some cases, a viscous fluid such as grease is applied between the rotating body and the frictional resistance imparting member in order to prevent wear of each of these members and to impart an appropriate resistance feeling (viscous feeling). In this case, if only the radial rib is formed on the rotating member contact surface of the frictional resistance imparting member, the viscous fluid is pushed out to the outer periphery of the rotating member by the radial rib as the rotating member rotates, and the effect of applying the viscous fluid is obtained. Lost in a short time. On the other hand, if an annular rib is formed on the rotating member abutting surface of the frictional resistance applying member, the viscous fluid can be prevented from flowing out, so that the durability of the rotating body and the frictional resistance applying member and thus the rotary operation device can be improved. Can be increased.

  In the rotational operation device of the present invention, since the plurality of elastic members are equally arranged around the shaft portion, the elastic force applied to the rotating body is made uniform without being biased in one direction, and the surface state of the rotating body Even if the (coefficient of friction) varies depending on the location, the operation resistance does not vary depending on the rotation angle, and the operational feeling of the rotating body can be improved.

  Hereinafter, an embodiment of a rotary operation device according to the present invention will be described with reference to FIGS. 1 is an exploded perspective view of a rotary operation device according to an embodiment, FIG. 2 is a cross-sectional view of an assembly state of the rotary operation device according to the embodiment, FIG. 3 is a plan view of a base according to the embodiment, and FIG. Is a front view of the rotating body according to the embodiment, FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, FIG. 6 is a plan view of the rotating body according to the embodiment, and FIG. FIG. 8 is a front view of a frictional resistance imparting member according to the embodiment, FIG. 9 is a plan view of the frictional resistance imparting member according to the embodiment, and FIG. 10 is a bottom view of the frictional resistance imparting member according to the embodiment. 11 is a plan view of the lid member according to the embodiment, FIG. 12 is a cross-sectional view taken along the line BB of FIG. 11, and FIG. 13 is a bottom view of the lid member according to the embodiment.

  As shown in FIGS. 1 and 2, the rotation operating device of this example is configured by joining a base 1, a lower case 2 joined to a lower portion of the base 1, and a base 1 and a lower case 2. A wiring board 3 set in the space to be configured, a rotary operation type electrical component 4 and other electrical components 5 mounted on the wiring board 3, and a rotary operation type electrical component supported rotatably on the base 1 A rotating body 6 that rotationally drives the rotating shaft 4a, a driving rod 7 that is attached to the rotating body 6 and that provides a click feeling to the operation of the rotating body 6, and a first that constantly biases the driving rod 7 outward. An elastic member 8, a frictional resistance applying member 9 for applying a required frictional resistance to the rotation of the rotating body 6, a lid member 10 fastened to the base 1, and a screw 11 for fastening the lid member 10 to the base 1 The tension member 9 is stretched between the frictional resistance applying member 9 and the lid member 10 to apply a pressing force to the frictional resistance applying member 9. And Azukasuru second elastic member 12, and is mainly composed of a knob 13 for attached to the rotating body 6.

  Among the above members, the base 1, the lower case 2, the rotating body 6, the drive rod 7, the frictional resistance imparting member 9, the lid member 10 and the knob 13 are formed of a synthetic resin molded body.

  As shown in FIGS. 1 to 3, the base 1 is formed in a box shape having no lower surface, and a cylindrical portion 21 is formed on the upper surface of the substantially central portion. Three concave grooves 22 for positioning the lid member 10 are formed on the upper surface of the cylindrical portion 21 at a pitch of 120 degrees. Further, on the inner surface of the cylindrical portion 21, a click feeling is formed by equally arranging a plurality of cam peaks 23a and cam grooves 23b (16 in the example of FIG. 2) whose arc shapes are circular. An imparting cam 23 is formed. In addition, three cylindrical bosses 24 are formed at a 120-degree pitch between the concave grooves 22 in the outer peripheral portion of the cylindrical portion 21, and the lid member 10 is fastened to the center of each boss 24. A screw hole 25 is formed. Further, a cylindrical rotating body holding projection 26 for rotatably holding the rotating body 6 is formed on the inner peripheral portion of the cylindrical portion 21 concentrically with the cylindrical portion 21. Furthermore, an engagement hole 27 for snap-coupling the lower case 2 is formed around the lower portion of the base 1.

  The lower case 2 is formed in a lid shape that can be attached to the lower surface of the base 1, and a portion corresponding to the engagement hole 27 formed in the base 1 has an engaging claw to be engaged therewith. 28 is formed. The lower case 2 is snap-coupled to the base 1 by engaging an engagement claw 28 formed in the lower case 2 with an engagement hole 27 formed in the base 1.

  A required wiring pattern (not shown) is formed on the wiring board 3, and the rotary operation type electric component 4 and other electric components 5 are mounted in a required arrangement. The wiring board 3 is attached to the base 1 with screws or the like (not shown). As the rotary operation type electric component 4, any rotary operation type electric component such as a rotary switch or a rotary volume can be used.

  As shown in FIGS. 1, 2, 4 to 7, the rotating body 6 includes a disc-shaped flange 31 that can be accommodated in a cylindrical portion 21 formed on the base 1, and the flange 31. The shaft portion 32 is erected from the center portion, and the two drive rods 7 and the storage hole 33 of the first elastic member 8 are formed on the peripheral surface of the flange portion 31 via the center of the shaft portion 32. It is opened oppositely. The first elastic member 8 and the drive rod 7 are housed in the housing hole 33 in this order, and the drive rod 7 is constantly urged outward by the elastic force of the first elastic member 8.

  On the upper surface of the flange portion 31, an arc-shaped concave groove 34 is formed on the outer periphery of the shaft portion 32 so as to be opposed to each other, and ring-shaped inner peripheral portions 35a and outer peripheral portions 35b excluding the portions where the concave grooves 34 are formed, and A connecting portion 35c that connects the inner peripheral portion 35a and the outer peripheral portion 35b is a contact portion of the frictional resistance imparting member 9. Further, on the lower surface of the flange portion 31, an inner peripheral rib 36a, an outer peripheral rib 36b, and a radiation rib 36c that connects these ribs 36a and 36b are formed on the outer periphery of the shaft portion 32. A ring-shaped concave groove 37 for inserting the rotating body holding projection 25 formed on the base 1 is formed between the rib 36a.

  On the other hand, a concave portion 38 for inserting the rotary shaft 4a of the rotary operation type electric component 4 is formed on the lower surface of the shaft portion 32, and the rotary shaft 4a of the rotary operation type electric component 4 is formed in the concave portion 38. A D-shaped connecting hole 38a for connecting the two in a non-rotatable manner is formed. Further, a cross-shaped rib 39 for connecting the knob 13 so as not to idle is formed on the upper end portion of the shaft portion 32.

  As shown in FIGS. 8 to 10, the frictional resistance imparting member 9 is composed of an annular friction plate 41 and three locking members 42 erected at a 120-degree pitch from the upper surface of the friction plate 41. It is supported so as to be capable of reciprocating in the axial direction, and is elastically biased against the contact portion on the upper surface of the flange portion 31. On the upper surface of the friction plate 41, three recesses 43 for inserting the lower end portion of the second elastic member 12 are formed at a pitch of 120 degrees between the locking members 42. The ring-shaped inner circumferential portion 35a and the outer circumferential portion 35b formed on the upper surface of the flange portion 26 are connected to the ring-shaped inner circumferential rib 44a and the outer circumferential rib 44b and the ribs 44a and 44b. Radiation ribs 44c are formed. A locking claw 45 for connecting the frictional resistance applying member 9 to the lid member 10 is formed on the outer surface of the upper end portion of the locking member 42.

  As shown in FIGS. 11 to 13, the lid member 10 includes a disc-shaped main body 51, a rotating body holding portion 52 bulging upward from the central portion of the main body 51, and the main body 51. Three spring insertion portions 53 bulging upward from the outer peripheral portion of the rotating body holding portion 52 at a 120 degree pitch, and three protruding outward from the outermost peripheral portion of the main body 51 at a 120 degree pitch. Three frictional resistance imparting members established at a pitch of 120 degrees between the boss portion 54, the screw through hole 55 established in the central portion of the boss portion 54, and the spring insertion portion 53 in the main body portion 51. The mounting hole 56 and three positioning projections 57 projecting downward at a pitch of 120 degrees between the boss portions 54 on the lower surface of the outermost peripheral portion of the main body 51 are configured.

  A through hole 61 for penetrating the shaft portion 32 of the rotating body 6 is opened at the center of the rotating body holding portion 52. The through hole 61 regulates the set position of the shaft portion 32 with respect to the base 1 and is formed to have a required dimension that does not hinder the rotation of the shaft portion 32 and does not cause an excessive gap between the shaft portion 32. Is done.

  The spring insertion portion 53 is formed at a position facing the three recesses 43 formed on the upper surface of the friction plate 41, and the screw through hole 55 is opened at a position facing the screw hole 25 formed in the base 1. . The frictional resistance imparting member mounting hole 56 is formed at a position facing the three locking members 42 erected from the upper surface of the friction plate 41, and the positioning projection 57 is formed in the cylindrical portion 21 of the base 1. It is formed at a position facing the concave groove 22.

  The second elastic member 12 is stretched between the three recesses 43 formed on the upper surface of the friction plate 41 and the spring insertion portion 53, and applies a required pressing force to the frictional resistance applying member 9.

  The knob 13 is for a user to operate the rotary operation type electric component 4 and is formed in a size and a shape that can be rotated by a finger.

  Hereinafter, a method for assembling the rotary operation device according to the embodiment will be described.

  First, the first elastic member 8 and the drive rod 7 are accommodated in this order in the accommodation hole 33 opened in the collar portion 31 of the rotary body 6, and the rotary body 6, the drive rod 7 and the first elastic member 8 are assembled. Complete.

  Next, the flange 31 of the rotating body 6 in which the drive rod 7 and the first elastic member 8 are integrally assembled is inserted into the cylindrical portion 21 formed on the base 1, and the inner peripheral portion of the cylindrical portion 21 is inserted. The cylindrical rotating body holding projection 26 formed in the above is inserted into a ring-shaped concave groove 37 formed on the lower surface of the rotating body 6. Thereby, the rotating body 6 is stably held on the base 1, and the tip ends of the two drive rods 7 are brought into contact with the cams 23 formed on the inner surface of the cylindrical portion 21.

  In parallel with the above operation, the frictional resistance applying member 9, the lid member 10, and the second elastic member 12 are assembled. In assembling these members 9, 10, 12, first, the second elastic member 12 is set in the three recesses 43 formed on the upper surface of the friction plate 41, and then the spring insertion portion 53 formed in the lid member 10. The upper part of the second elastic member 12 is inserted into the inside. Next, in a state where the three locking members 42 erected on the upper surface of the friction plate 41 are respectively inserted into the three frictional resistance imparting member mounting holes 56 opened in the main body 51 of the lid member 10, the lid member 10 is pushed down against the elastic force of the second elastic member 12 toward the friction plate 41 side of the frictional resistance applying member 9. At this time, the locking member 42 is elastically deformed inward by the pressing force of the lid member 10, and the locking claw 45 can be inserted into the frictional resistance applying member mounting hole 56. When the locking claw 45 reaches above the upper surface of the lid member 10, the locking claw 45 moves outward by the elastic force of the locking member 42. Therefore, when the pressing force applied to the lid member 10 in this state is removed, the lid member 10 is raised by the elastic force of the second elastic member 12, and the locking claw 45 is engaged with the upper surface of the lid member 10. . Thereby, the assembly of the frictional resistance imparting member 9, the lid member 10, and the second elastic member 12 is completed.

  Next, the shaft portion 32 of the rotating body 6 is passed through the through hole 61 provided in the lid member 10, and the friction plate 41 of the frictional resistance applying member 9 is concentrically overlapped on the upper surface of the flange portion 31 of the rotating body 6. At this time, the positioning projection 57 formed on the lower surface of the lid member 10 is automatically fitted into the groove 22 formed in the cylindrical portion 21 of the base 1, and the through hole 61 is formed at the center of the cylindrical portion 21. The center is automatically matched, and the rotating body 6 is automatically centered with respect to the cam 23, and the screw hole 25 formed in the base 1 and the screw through hole 55 formed in the lid member 10 are provided. Since the alignment is automatically performed, the screw 11 penetrated from above the screw through hole 55 is screwed into the screw hole 25, and the lid member 11 is fastened to the cylindrical portion 21 of the base 1.

  Next, the knob 13 is attached to the upper end portion of the shaft portion 32 protruding upward from the upper surface of the lid member 10. Further, after inserting the rotating shaft 4a of the rotary operation type electric part into the recess 38 formed on the lower surface of the rotating body 6 and connecting the rotating shaft 4a and the shaft portion 32 of the rotating body 6 coaxially, the wiring board 3 is connected. Is fixed to the base 1. Finally, the lower case 2 is snap-coupled to the base 1 by engaging the engaging claws 28 formed in the lower case 2 with the engaging holes 27 formed in the base 1.

  The rotation operation device according to the present embodiment has the following effects.

  (1) Since the three second elastic members 12 are equally arranged around the shaft portion 32, the frictional force acting between the rotating body 6 and the frictional resistance imparting member 9 is changed in the circumferential direction of these members. Can be made uniform, uneven rotation of the rotating body 6 can be prevented, and the operational feeling of the rotating body 6 can be made favorable.

  (2) Since the three frictional members are equally provided on the frictional resistance applying member 9 and can be snap-coupled to the lid member 10, the second elastic member is provided between the frictional resistance applying member 9 and the lid member 10. 12, and assembling the frictional resistance imparting member 9, the lid member 10, and the second elastic member 12 by simply pressing the lid member 10 against the frictional resistance imparting member 9 against the elastic force of the second elastic member 12. Can be completed, and the assembly of the rotary operation device can be improved.

  (3) Since the radial ribs 44c are formed on the lower surface (rotating body contact surface) of the frictional resistance applying member 9, the rotating body contact is compared with the case where the rotating body contacting surface of the frictional resistance applying member 9 is formed in a flat shape. The plane accuracy of the contact surface can be increased, and the frictional force acting between the rotating body 6 and the frictional resistance imparting member 9 can be made more uniform in the circumferential direction of each of these members. The operational feeling of 6 can be improved.

  (4) Since the radial rib 44c and the annular rib 44b connecting the outer periphery of the radial rib 44c are formed on the rotating body contact surface of the frictional resistance applying member 9, grease is provided between the rotating body 6 and the frictional resistance applying member 9. Even when a viscous fluid such as the above is applied, the outflow of the viscous fluid is prevented, and the durability of the rotating body 6 and the frictional resistance imparting member 9 and thus the rotary operation device can be enhanced.

It is a disassembled perspective view of the rotation operation device according to the embodiment. It is sectional drawing of the assembly state of the rotary operation apparatus which concerns on the example of embodiment. It is a top view of the base concerning the example of an embodiment. It is a front view of the rotary body which concerns on the example of embodiment. It is AA sectional drawing of FIG. It is a top view of the rotating body concerning the example of an embodiment. It is a bottom view of the rotary body which concerns on the example of embodiment. It is a front view of the frictional resistance provision member which concerns on the example of embodiment. It is a top view of the frictional resistance provision member which concerns on the example of embodiment. It is a bottom view of the frictional resistance provision member which concerns on the example of embodiment. It is a top view of the lid member concerning an example of an embodiment. It is BB sectional drawing of FIG. It is a bottom view of the lid member concerning the example of an embodiment.

Explanation of symbols

1 base 2 lower case 3 wiring board 3
DESCRIPTION OF SYMBOLS 4 Rotation operation type electric component 5 Other electric components 6 Rotating body 7 Drive rod 8 1st elastic member 9 Friction resistance provision member 10 Lid member 11 Screw 12 2nd elastic member 13 Knob 41 Friction plate 42 Locking member 44b Annular rib 44c Radial rib 45 Locking claw

Claims (4)

  A rotating body that includes a base, a disk-shaped flange and a shaft provided at the center of the flange, and is rotatably supported by the base; An annular frictional resistance imparting member that is elastically biased with respect to the collar part; and an elastic member that elastically contacts the frictional resistance imparting member to the collar part of the rotating body, wherein the frictional resistance imparting member is provided on the rotating body. A rotary operation device that is in contact with a collar portion, wherein the plurality of elastic members are equally arranged around the shaft portion.   The rotating body, the frictional resistance applying member, and the elastic member are accommodated in a space formed by a hollow cylindrical portion formed on the base and a lid member attached to an open end of the cylindrical portion. The frictional resistance imparting member is composed of a friction plate abutting against the flange portion of the rotating body and a plurality of locking members erected from the upper surface of the friction plate, and the tip of the locking member The latching claw formed on the lid member is snap-coupled to the lid member so as to be vertically movable by latching to the latching claw engaging portion provided on the lid member, and the elastic member is snap-coupled The rotation operation device according to claim 1, wherein the rotation operation device is set between a frictional resistance applying member and the lid member.   The rotary operation device according to claim 1, wherein the frictional resistance applying member is formed of a resin molded product, and radial ribs are formed on a rotating body contact surface of the frictional resistance applying member.   The said frictional resistance provision member is comprised with the molded article of resin, The radial rib and the cyclic | annular rib which connects the outer periphery of the said radial rib were formed in the rotary body contact surface of the said frictional resistance provision member. The rotary operation device according to 1.

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