TWI505312B - Rotary operation of the electronic components of the bearing structure - Google Patents

Description

Bearing construction of rotary operation type electronic parts

The present invention relates to a bearing structure of a rotary operation type electronic component used as a rotary switch and a variable resistor of a portable electronic device such as a wireless device.

Conventionally, a bearing structure used in a rotary switch, a variable resistor, or the like is a structure in which a shaft is inserted into a bearing as shown in, for example, Japanese Patent No. 4759071 and Japanese Laid-Open No. 62-168607. Therefore, the configuration in which the thrust in the thrust direction and the radial direction of the shaft is reduced is not provided, and the movement is determined in accordance with the dimensional accuracy of the bearing and the shaft.

Further, Japanese Patent No. 3698270 discloses a rotary disk type switch having a bearing structure for holding an O-ring between the inner wall surface of the casing and the outer circumferential surface of the rotor. This bearing structure can suppress the movement in the radial direction, but the movement in the axial direction cannot be suppressed.

Although the rotary switch of the portable electronic device is required to be miniaturized, the size of the operation knob is still used to satisfy the ease of operation. Therefore, the movement of the shaft in the operation position of the knob is increased by the size of the knob, and the operator is not able to feel smooth during the operation of the knob.

The present invention has been made in view of the above problems, and an object thereof is to provide a bearing structure of a rotary operation type electronic component capable of suppressing an axial direction and a radial direction. Swimming.

The bearing structure of the rotary operation type electronic component according to the present invention includes a rotary operation shaft, and is provided with a cylindrical operation portion and a stepped portion formed at one end of the operation portion to extend the outer diameter in the axial direction. a holding portion and a driving portion extending further from the holding portion in the axial direction; and a bearing having a shaft hole through which the holding portion is inserted and rotatably held by the holding portion, and one end facing the stage portion Provided at the other end of the bearing, a motor signal control unit that performs signal control by rotation of a rotating member fixed to the driving portion, wherein the bearing is formed at one end of the bearing and at an inner circumference of the shaft hole a tapered surface having an inner diameter that increases outward is elastically held between the tapered surface and the step portion, and the elastic ring is attached to the holding portion, and is formed on the outer periphery of the end portion of the holding portion on the side of the driving portion. The annular groove is provided with a fixing ring, and the rotating operation shaft is stopped by being engaged with the other end of the bearing.

Or, the tapered surface is formed in a step portion between the rotational operation portion and the holding portion, and a receiving groove having an enlarged inner diameter is formed on the inner peripheral edge of the shaft hole, and the elastic ring is elastically held between the receiving groove and the tapered surface. .

In the present invention, since the external force for pressing the elastic ring by the tapered surface is distributed to the corner portion forming the step portion in the axial direction and the radial direction, the movement in the axial direction and the radial direction can be suppressed.

[First Embodiment]

Fig. 1 shows a rotary switch to which the bearing structure of the present invention is applied An exploded perspective view of the embodiment is shown in Fig. 2 in the axial direction.

This rotary type switch has a cylindrical rotary operation shaft 10, a bearing 20 through which the rotary operation shaft 10 is inserted, a rotary member 7 attached to the rotary operation shaft 10 and rotated, and a bracket 6.

The rotary operation shaft 10 is formed of a resin or a metal, and is coaxially provided with a cylindrical operation portion 11 having an outer peripheral surface chamfered in parallel with the axial direction, and a smaller diameter from the one end of the operation portion 11 The cylindrical holding portion 12 having an axial direction extending and a cylindrical driving portion 13 extending in the axial direction from the one end of the holding portion 12 are further reduced in diameter. The end surface of the operation portion 11 on the side of the holding portion 12 and the outer circumferential surface of the holding portion 12 are perpendicularly intersected to form a step portion 10S. An annular groove 12a is formed on the outer circumference of the end surface on the opposite side of the operation portion 11 adjacent to the holding portion 12. Both sides of the driving portion 13 are formed by plane machining parallel to the axial direction of the center line of the clamping axis. Therefore, the cross section at right angles to the center line of the shaft is formed in a quadrangular shape, and the two sides facing each other are in the shape of a circular arc.

The bearing 20 is formed of a resin or a metal, and is provided with a cylindrical portion 21 having an inner diameter smaller than the outer diameter of the operation portion 11 of the rotary operation shaft 10 and having the shaft hole 24 through which the holding portion 12 is inserted, and integrally formed. The outer shell portion 22 of the almost rectangular body at one end of the cylindrical portion 21. A screw for attaching the rotary switch to the machine casing is formed on the outer peripheral surface of the cylindrical portion 21. At the tip end portion of the cylindrical portion 21 and at the inner peripheral edge of the shaft hole 24, a tapered surface 20T whose inner diameter is gradually increased by 45° toward the axial direction of the shaft hole 24 is preferably formed. A circular housing recess 23 that communicates with the shaft hole 24 and is concentric with the shaft hole 24 and has a larger diameter is formed in the outer casing portion 22, and a surface facing the opposite side of the cylindrical portion 21 is opened.

The inner diameter is almost equal to the outer diameter of the holding portion 12, and the outer diameter is a ratio of rotation The outer diameter of the operation portion 11 of the operation shaft 10 is small, and the elastic ring 3 having a circular cross section formed of a rubber material is attached to the holding portion 12 so as to be in contact with the step portion 10S of the rotary operation shaft 10, and the holding portion 12 is provided. In the state in which the shaft hole 24 of the bearing 20 is inserted, the outer diameter of the annular groove 12a of the end portion of the holding portion 12 projecting into the housing recess 23 is larger than the inner diameter of the shaft hole 24, and the ring is cut. The broken elastic metal retaining ring 4 engages the bottom surface 23a of the receiving recess 23 adjacent to the shaft hole 24 to cause the rotational operation shaft 10 to be stopped. At this time, the elastic ring 3 held between the step portion 10S and the tapered surface 20T is elastically pressed by the angle at which the tapered surface 20T intersects the outer peripheral surface of the step portion 10S and the holding portion 12 and is deformed. When the external force is applied to the rotational operation shaft 10 in the axial direction and/or the radial direction, the elastic ring 3 is further deformed by its elastic force against the external force. Thereby, the movement of the rotational operation shaft 10 with respect to the axial direction and the radial direction of the bearing 20 is elastically suppressed. Therefore, the operator can obtain a smooth rotational operation feeling. As the material of the elastic ring 3, a fluororesin having a lubricity, a enamel resin, or the like can be used.

The rotary member 7 is formed of a resin, and has a rotary shaft 7A formed with a shaft hole 7D having the same cross-sectional shape as that of the drive portion 13 of the rotary operation shaft 10, and is integrally formed coaxially with the rotary shaft 7A and has one end at one end thereof. The disk portion 7B of the plate surface at right angles to the axial direction is rotatably disposed in the housing recess 23 of the outer casing portion 22. The sliding contact piece 7C formed by the metal plate is attached to the plate surface on the opposite side of the bearing 20 of the disk portion 7B by the same surface as the plate surface.

The bracket 6 is formed of a resin, and has a cross-sectional shape at right angles to the axial direction, which is a rectangular parallelepiped with the outer casing portion 22, and is covered from the rotating member 7 to the outer casing portion 22. on. As shown in Fig. 3, the bracket 6 has a circular receiving recessed portion 6A on the surface of the outer casing portion 22 on the surface of the outer casing portion 22, and a bracket 6 is formed in the center thereof. Shaft hole 6D. The elastic contact members 6C1, 6C2, and the two elastic contact members 6C3 project inward from the inner peripheral surface of the housing recessed portion 6A, and the elastic contact member 6C1 and one of the elastic contact members 6C3 and the elastic contact member 6C2 and the other elastic portion The group of the contacts 6C3 is located at the opposite sides of the shaft hole 6D, and the elastic contacts 6C1, 6C2, and 6C3 are bent so that the tip end portion thereof is bent outward to protrude outward from the opening of the housing recess 6A. The other ends of the elastic contact members 6C1 and 6C2 protrude outward from the side of the bracket 6, and the terminals 6T1, 6T2 are formed separately. The other ends of the two elastic contact members 6C3 are integrally formed, and the terminal 6T3 is outward from the side of the bracket 6. protruding.

The drive portion 13 protruding in the housing recess 23 is inserted into the shaft hole 7D of the rotor 7 to dispose the disc portion 7B of the rotor 7 in the housing recess 23, and the tip end of the drive portion 13 is from the shaft hole 6D of the bracket 6. The holder 6 is rotatably protruded, and the holder 6 is placed in such a manner that the housing recess 23 is plugged from the rotary member 7, and the fixing pin 8 is inserted into the fixing hole 6a of the bracket 6 and the fixing hole 22a of the outer casing portion 22 is riveted by the rivet tip end. Form a rotary switch.

The operation portion 11 of the rotary operation shaft 10 is rotated by rotating the rotary member 7. The tip end portions of the elastic contact members 6C1 and 6C2, 6C3 provided in the bracket 6 are located at different radial positions from the center of the shaft of the rotational operation shaft 10. That is, in this example, the two elastic contact members 6C3 common to the terminals 6T3 are located on both sides of the rotating shaft 7A of the rotating member 7, and the elastic contact members 6C1 and 6C2 are located at the outer positions of the radially outer portions. Front end, by The rotation of the rotary member 7 is in sliding contact with the sliding contact piece 7C provided on the plate surface of the disk portion 7B. The sliding contact piece 7C is configured to electrically connect the terminals 6T1 and 6T3 in a first predetermined range of rotation angles of the rotor 7, and to extend the terminals 6T2 and 6T3 in a second predetermined range of rotation angles (multiple numbers are also possible). The manner of conduction between them determines the number of sliding contact pieces 7C, the respective arc angles, the position and width in the radial direction, and the like.

Since the axial direction position of the annular groove 12a and the axial direction position of the fixed ring 4 are determined in a desired manner, the tapered surface 20T can be set to be applied to the elastic ring 3 by the predetermined pressing force, so that the operating shaft 10 is rotated. The frictional force with the elastic ring 3 can be set between the tapered surface 20T and the operator can be given a proper rotational operation feeling. Further, if the material of the elastic ring 3 is a rubber material for sealing, the sealing effect between the bearing 20 and the rotary operation shaft 10 can be obtained.

[Second Embodiment]

Figs. 1, 2, and 3 are views showing a first embodiment in which the bearing structure of the present invention is applied to a rotary switch, but an exploded perspective view of an embodiment applied to the variable resistor is shown in Fig. 4, and its axial direction section It is shown in Figure 5. The variable resistor has a rotary operating shaft 10, a bearing 20, a rotating member 7', and a bracket 6', and an elastic ring 3, a fixing ring 4, and a fixing pin 8, and the first, second, and third Only the rotating member 7' and the bracket 6' differ between the first embodiment of the drawing. Therefore, the following description is centered on the different parts, and the description of the common parts is omitted as much as possible.

The rotary member 7' has the same rotational axis as the rotary member 7 of Fig. 1. 7A and the disk portion 7B, but the sliding contact piece 7'C can be attached to the plate surface of the disk portion 7B instead of the sliding contact piece 7C in Fig. 1 . The sliding contact piece 7'C has a base portion 7'Cb which is formed by press working from an elastic metal plate and has a substantially half moon shape; and a side edge of the rotation shaft 7A side of the base portion 7'Cb is extended from the side of the rotation shaft 7A of the base portion 7'Cb Two contact members 7'C1 which are bent away from the plate surface of the disk portion 7B and a plate which is extended from the aforementioned side edge of the base portion 7'Cb by the outer side of the two contact members 7'C1 and which is away from the disk portion 7B The way of the face is the tortuous contact 7'C2.

The base portion 7'Cb is press-fitted and fixed to an unillustrated projection projecting from the plate surface of the disc portion 7B by a fixing hole 7'Aa formed in the base portion. The tip end portions of the contact members 7'C1, 7'C2 are folded back toward the plate surface side of the disc portion 7B to form curved portions 7'C1a, 7'C2a convex toward the bracket 6' side, each of which becomes a contact member. Sliding point. The curved portions 7'C1a, 7'C2a are juxtaposed in a straight line perpendicular to the center line of rotation, and the curved portions 7'C1a of the two contact members 7'C1 are placed adjacent to each other on both sides of the rotating shaft 7A, and the contact member 7' The curved portion 7'C2a of C2 is located radially outward of the curved portion 7'C1a of one of the contacts.

The bracket 6' is attached to the bottom surface 6B of the housing recess 6A and the shaft hole 6D is attached as shown in Fig. 6A of the perspective view seen from the side of the rotor 7' and FIG. 6B of the plan view. The common conductor ring 6C formed by press working of a metal plate and the outer side of the common conductor ring 6C are provided with a ring-shaped resistor body 6R which is concentrically spaced apart. Both ends of the resistor 6R are connected to the terminals 6T1 and 6T2, respectively. The terminal 6T3 is integrally extended from the common conductor ring 6C through both ends of the resistor 6R.

Sliding contact piece 7'C in a state where the bracket 6' is covered on the outer casing portion 22. The bent portion 7'C1a of the two contacts 7'C1 is in elastic contact with the common conductor ring 6C, and the bent portion 7'C2a of the contact 7'C2 is in elastic contact with the resistor 6R. Therefore, if the rotating member 7' rotates, the resistance between the terminals 6T1 and 6T3 and the resistance between the terminals 6T2 and 6T3 change.

In the second embodiment, the cross section in the axial direction as shown in Fig. 5, the tapered surface 20T formed in the inner peripheral edge of the shaft hole 24 in the tip end portion of the cylindrical portion 21 of the bearing 20 is the stage toward the elastic ring 3 Since the intersection angle of the outer peripheral surface of the portion 10S and the holding portion 12 is pressed and deformed, it is possible to suppress the movement of the shaft 10 and the radial direction of the rotational operation shaft 10 of the bearing 20 .

[Modification 1]

In the second embodiment, as shown in Fig. 6A, the resistor body 6R and the common conductor ring 6C are provided on the bottom surface 6B of the housing recess 6A of the bracket 6', and the disc portion 7B of the rotary member 7' is provided with the contact member 7'. Sliding contact piece 7'C of C1, 7'C2. In the modified example, as shown in Fig. 7, an arc-shaped resistor body 7R is provided on the plate surface of the disk portion 7B of the rotary member 7', and a common conductor ring 7Cc is provided on the inner side thereof, and the bracket is the second figure. The holder 6 is in sliding contact with the resistor 7R and the common conductor ring 7Cc for the elastic contacts 6C1 and 6C3, respectively. However, the elastic contact piece 6C2 and the terminal 6T2 are not provided. In this case, in the rotary member 7', one end of the resistor body 7R is connected to the common conductor ring 7Cc.

[Modification 2]

Although shown in the first and second embodiments described above, the shaft of the bearing 20 is shown. The tip end portion of the hole 24 forms a tapered surface 20T to press the elastic ring 3 toward the step portion 10S. However, as shown in Fig. 8, the cross-sectional view corresponding to Fig. 3 is from the middle of the radial direction of the step portion 10S of the rotational operation shaft 10. The tapered surface 10T is formed in the distal end direction of the holding portion 12 so as to gradually decrease in diameter to the outer peripheral surface of the holding portion 12, and a receiving groove 20G having an enlarged inner diameter is formed on the inner peripheral edge of the shaft hole 24 at the tip end portion of the bearing 20. The elastic ring 3 attached to the receiving groove 20G may be pressed by the tapered surface 10T formed in the step portion 10S. This modification can also be applied to the second embodiment and the third and fourth embodiments described below.

[Third embodiment]

Fig. 9 is an exploded perspective view showing an embodiment in which the bearing structure of the present invention is applied to the rotary switch of the above-mentioned Japanese Patent No. 4759071, and Fig. 10 is a cross-sectional view showing the rotary switch in the axial direction. The rotary type switch of this embodiment is a rotary type switch as shown in Figs. 1, 2, and 3, and the click feeling is given to the operator at each rotation angle interval of the rotation operation shaft 10, and the number of switches is increased. Way to construct.

As shown in FIG. 9, the rotary switch is composed of: a rotary operation shaft 10, an elastic ring 3, a bearing 20, and a pawl disk 30, a pawl spring 40, and a pawl spring support plate 50, and The lower bracket 80, the rotating member 70, the upper bracket 60, the cover 90, and other components are formed. The upper bracket 60 and the cover 90 are combined to correspond to the bracket 6 in Fig. 1, and in this embodiment, a lower bracket 80 further having an elastic contact member is provided to increase the number of switches.

The rotational operation shaft 10 has the same structure as the rotational operation shaft 10 of Fig. 1, and the metal rod is formed into a cylindrical shape, and has an operation portion 11 and a holding portion 12 that is coaxially extended from the distal end thereof and is smaller than the diameter of the operation portion 11. And a drive unit 13 that is coaxially extended from the tip end of the holding portion 12 and that is smaller than the diameter of the holding portion 12. An annular groove 12a is formed on the outer peripheral surface of the tip end adjacent to the holding portion 12. At least one plane 13a formed by being cut in parallel with the central axis is formed in the driving portion 13. In the example of the figure, two planes parallel to each other that are symmetrically symmetrical with respect to the center of rotation of the rotational operation shaft 10 are formed.

The bearing 20 is a cylindrical portion 21 having a mounting screw formed on the outer circumference, and a rectangular outer casing portion 22 integrally formed at one end of the cylindrical portion 21. In the bearing 20, the shaft hole 24 through which the holding portion 12 of the rotary operation shaft 10 is rotatably inserted is formed to penetrate the center of the cylindrical portion 21. On the upper surface of the outer casing portion 22, fixing holes 22a are formed at a pair of diagonal corner portions, and positioning holes 22b are formed at diagonal corner portions of the other group. Further, in the center of the upper surface of the outer casing portion 22, a housing recess 23 having a circular shape coaxial with the cylindrical portion 21 is formed, and the shaft hole 24 is concentrically opened on the bottom surface thereof. In the elastic ring 3, the tip end portion of the holding portion 12 of the rotation operation shaft 10 of the insertion bearing 20 protrudes from the bottom surface of the housing recess 23 in a state in which the step portion 10S of the rotary operation shaft 10 is grounded, and the fixing ring is provided. 4 is installed in the annular groove 12a at the tip end portion thereof and is stopped.

In this embodiment, the outer casing portion 22 is a receiving pawl disk 30. The pawl disk 30 has a shaft portion 31 at its center portion, and has convex portions 32 extending radially on the outer surface of the shaft portion 31, and irregularities are arranged in the circumferential direction. The rotation shaft 71 of the rotary member 70 is formed in the shaft portion 31 toward the axial direction The inserted shaft hole 33 protrudes from one of the inner circumferences of the shaft hole 33 toward the center, and an engagement wedge 34 extending in the axial direction is formed. The front end surface facing the center of the engaging wedge 34 is a flat surface that is in contact with the flat surface 13a of the driving portion 13, and when the rotational operation shaft 10 is rotated, the flat surface 13a of the driving shaft portion 13 that is inserted into the shaft hole 33 is engaged. And the front end plane of the engaging wedge 34 rotates the pawl disc 30.

The annular pawl spring 40 is formed by punching an elastic metal plate, and an engaging projection 41 that protrudes toward the pawl disk 30 is formed at two places on one diameter of the annular portion, and further has a diameter from Two fixed terminals 42 of the other one of the right angles which extend outward from each other on the extension line of the diameter. The fixed terminal 42 is bent toward the opposite side of the pawl disk 30 at an intermediate portion of the plate surface by almost 45°. The pawl spring 40 is bent at 45°, whereby the locking groove 55 of the pawl spring supporting plate 50 to be described later can be shallowly engaged, and therefore, the thickness of the pawl spring supporting plate 50 can be made thin.

The pawl spring 40 is mounted below the pawl spring support plate 50. 11A and 11B are perspective views showing the front and rear of the pawl spring 40 before and after installation. However, the group of the click spring 40 and the pawl spring support plate 50 in Fig. 9 is rotated by 180° around the center line 5X. The pawl spring support plate 50 is formed in the same rectangular shape as the outer casing portion 22, and an annular recess 52 for receiving the annular pawl spring 40 is formed on the lower surface thereof, and a shaft hole 51 is formed in the center. The diameter of the shaft hole 51 is a diameter through which the rotation shaft 71 of the rotor 70 to be described later is rotatably inserted. Two positioning holes 53b are formed adjacent to one side of the pawl spring support plate 50, and are formed in the vicinity of a pair of diagonal corners. The fixing holes 53a are formed, and the positioning protrusions 54 are formed below the diagonal corners of the other group.

The two fixed terminals 42 of the click spring 40 are inserted into the locking grooves 55 that are formed to extend in the center direction from the fixing holes 53a of the support plate 50. In the state in which the pawl spring support plate 50 is inserted, the drive portion 13 is inserted into the shaft hole 51, and the accommodation recessed portion 23 in which the pawl disk 30 is housed is attached to the upper surface of the outer casing portion 22 from above. At this time, the positioning projection 54 of the pawl spring support plate 50 is a positioning hole 22b that is press-fitted to the upper surface of the outer casing portion 22.

Fig. 12A is a plan view showing the rotary member 70, Fig. 12B is a cross-sectional view taken along line 12B-12B in Fig. 12A, and Fig. 12C is shown at 12B-12B in Fig. 12A The line below is centered at 180°. In this embodiment, in order to increase the number of switches that can be used, the contact and disengagement of the elastic contact piece and the sliding contact piece can be performed separately on both the one surface and the other surface of the disk portion of the rotor. In other words, the rotating member 70 is such that the rotating shaft 71 and the disk portion 72 located in the middle of the longitudinal direction of the rotating shaft 71 and coaxial with the rotating shaft 71, and the sliding contact piece 7C held by the disk portion 72 are formed by insert molding. And formed in one. A shaft hole 73 having the same cross-sectional shape as the shaft hole 33 of the pawl disk 30 is formed in the rotating shaft 71. Further, a circular arc portion at the lower end of the rotating shaft 71 is formed with a notch portion 74 having a predetermined length cut away from the lower end in the axial direction. The notch portion 74 is such that the rotation shaft 71 passes through the shaft hole 51 and is engaged with the engagement wedge 34 in the shaft hole 33 of the pawl disk 30, whereby the rotation shaft 71 has only the axial length of the notch portion 74 inserted into the shaft hole. 33a.

The sliding contact piece 7C is composed of the upper side contact piece 7C1 and the lower side contact piece In the case of the 7C2, the pattern of the upper and lower contact pieces 7C1 and 7C2 which are connected to each other by punching one metal plate as shown in Fig. 13 is bent at the joint portion 7Cc as shown in Fig. 13B. It is formed by superposing the lower contact piece 7C2 on the lower side of the upper contact piece 7C1.

In this embodiment, the upper and lower contact pieces 7C1, 7C2 are inscribed in a pattern formed by a circle C1 common to the broken line shown in Fig. 13B, which is concentric with the circle C1 and has a smaller diameter C2. Each of C3 and C4 defines an endless belt B1, B2, B3 adjacent to each other having a width to be gripped, and the length (angle range) in the circumferential direction in each of the endless belts B1, B2, B3 The pattern of the contact piece in the field of the contact piece is determined in advance.

In the upper contact piece 7C1 of Fig. 12A, the endless belt B1 is buried by one contact piece field C1a of a predetermined angular range and the empty area G1a of the remaining angular range. The endless belt B2 is buried in the two contact piece fields C1b1, C1b2, and the adjacent empty areas G1b1, G1b2 in the two contact piece fields. The endless belt B3 is buried by one (360°) empty field G1c. The contact piece regions C1a, C1b1, and C1b2 are areas in which the metal surface of the contact piece 7C1 is exposed, and the empty areas G1a, G1b1, G1b2, and G1c are the insulator surfaces of the disk portion 72 located in the same plane as the surface of the contact piece.

On the other hand, in the lower contact piece 7C2 shown in Fig. 12C, the endless belt B1 is the four contact piece fields C2a1, C2a2, C2a3, C2a4, and those each of which is determined by a predetermined angular range. The empty areas G2a1, G2a2, G2a3, and G2a4 in the vicinity of the four contact piece fields are buried. The endless belt B2 is buried in the two contact piece fields C2b1, C2b2, and the adjacent empty areas G2b1, G2b2 in the two contact piece fields. The endless belt B3 is buried by one (360°) contact piece field C2c. The contact sheet regions C2a1, C2a2, C2a3, C2a4, C2b1, C2b2, and C2c are areas in which the metal surface of the contact sheet is exposed, and the empty regions G2a1, G2a2, G2a3, G2a4, G2b1, and G2b2 are in the same plane as the surface of the contact sheet region. The insulator surface of the disc portion 72.

In this embodiment, the upper bracket 60 and the lower bracket 80 have the same structure, and the direction in which the bracket formed as the same component is changed up and down can be used as the upper side and the lower side. Likewise, the cover 90 and the pawl spring support plate 50 are of identical construction. Thus, the manufacturing cost of the switch can be reduced by the same configuration.

Fig. 14A shows a lower portion of the lower bracket 80 and a lower portion of the rotary member 70 as viewed from above. A circular rotating member housing recess 82 is formed on the upper surface of the lower bracket 80, and an almost rectangular window 81 is formed at the bottom of the rotating member housing recess 82. In the side wall portion of the rotor housing recess 82 that is adjacent to one side of the lower bracket 80, an engagement convex portion 85 that protrudes from the lower surface toward the side of the upper bracket 60 is formed (see also FIG. 9) And an engaging recessed portion 86 which is adjacent to the engaging convex portion 85 and has the side wall portion cut away by the same width (see also FIG. 9). A fixing hole 84a is formed in the vicinity of a diagonal corner portion of one set of the lower bracket 80, and a positioning hole 84b is formed in the vicinity of a diagonal corner portion of the other group. Further, two positioning projections 83 adjacent to one side from which the terminals 8T1, 8T2, and 8T3 are led are formed.

The lower bracket 80 is formed by insert molding three elastic contacts 8C1, 8C2, and 8C3 and terminals 8T1, 8T2, and 8T3 integrally extended therefrom and projecting outward from one side of the lower bracket 80. The three elastic contact members 8C1, 8C2, 8C3 extend inward from the edge of the window 81, and the leading ends of those are located on the endless belts B1, B2, B3 respectively defined by the sliding contact pieces 7C of the rotary member 70. Each of the elastic contact members 8C1, 8C2, and 8C3 has two branching arms, and the stability (reliability) and life of the contact are improved by the two-point contact in each of the endless belts.

Fig. 14B is a view showing the upper surface of the upper bracket 60 and a part of the upper surface of the rotary member 70 as viewed from below. As described above, the configuration of the upper side bracket 60 is identical to that of the lower side bracket 80. A circular rotor housing recess 62 is formed on the lower surface of the upper bracket 60 which is almost rectangular like the outer casing portion 22, and an almost rectangular window 61 is formed on the top of the rotor housing recess 62. In the side wall portion of the rotor housing recess 62 adjacent to one side of the upper bracket 60, an engaging convex portion 65 projecting from the lower surface toward the lower bracket 80 side, and the engaging convex portion are formed. An engaging recess 66 that is adjacent to each other and whose side wall portion is cut by the same width. A fixing hole 64a is formed in a diagonal corner portion of one set of the upper bracket 60, and a positioning hole 64b is formed in a diagonal corner portion of the other group. Further, two positioning projections 63 adjacent to one side from which the terminals 6T1, 6T2, and 6T3 are led are formed.

The upper bracket 60 is formed by insert molding together with three elastic contacts 6C1, 6C2, and 6C3, and terminals 6T1, 6T2, and 6T3 which are integrally extended and protrude outward from one side of the upper bracket 60. The three elastic contact members 6C1, 6C2, and 6C3 extend from the edge of the window 61 toward the inner side, that The leading ends are each located on the endless belts B1, B2, B3 defined by the sliding contact piece 7C of the rotary member 70. In this example, each of the elastic contact members 6C1, 6C2, and 6C3 has two branching arms, and is in contact with each of the endless belts at two points.

Returning to Fig. 9, the positioning projection 83 of the lower bracket 80 (refer to Fig. 14A) is fitted to the positioning hole 53b of the pawl spring supporting plate 50, so that the lower bracket 80 is positioned and fixed to the pawl spring supporting plate. 50 on. From the above, the drive portion 13 of the rotary operation shaft 10 is inserted into the shaft hole of the rotary member 70 so that the substantially lower half of the disc portion 72 of the rotary member 70 is disposed in the rotary member housing recess 82 of the lower bracket 80. 73, and the lower end portion of the rotating shaft 71 is passed through the shaft hole 51 of the pawl spring supporting plate 50 and inserted into the shaft hole 33 of the pawl disk 30.

The upper bracket 60 is covered from the upper side of the rotor 70 so that almost the upper half of the disc portion 72 of the rotor 70 is housed in the rotor housing recess 62 of the upper bracket 60, and is superposed and fixed to the lower bracket 80. At this time, the engagement convex portion 65 and the engagement concave portion 66 (refer to FIG. 14B) of the upper bracket 60 are the engagement concave portions 86 and the engagement convex portions 85 that are fitted to the lower bracket 80, respectively, and are positioned. Further, the upper end portion of the rotating shaft 71 of the rotary member 70 is inserted into the shaft hole 91 of the cover 90, and the cover 90 is overlapped from the upper bracket 60 to fit the positioning projection 94 to the positioning hole 64b, and the positioning projection 63 is fitted in the positioning. Hole 93b. Thereby, the elastic contacts 8C1, 8C2, 8C3 of the lower bracket 80 are maintained in elastic contact with the lower surface of the disc portion 72 of the rotary member 70, and the elastic contact members 6C1, 6C2, 6C3 of the upper bracket 60 are coupled to the rotary member 70. The upper surface of the disc portion 72 is elastically contact-maintained.

In this state, the two fixing pins 8 are inserted in the state in which the components are combined: the fixing hole 93a of the cover 90, the fixing hole 64a of the upper bracket 60, the fixing hole 84a of the lower bracket 80, and the pawl spring supporting plate 50. The fixing hole 53a and the fixing hole 22a of the bearing 20 crush the tip end of the pin 8 by rivets and are integrally fixed to each other.

By assembling the rotary switch in this manner, the drive portion 13 is a shaft hole 73 through which the rotation shaft 71 of the rotary member 70 of the pawl disc 30 and the pawl spring support plate 50 is inserted, and is supported by the shaft of the cover 90. Inside the hole 91. The cross section at right angles to the axial center of the shaft hole 73 of the rotary member 70 is formed in the same manner as the cross section of the drive portion 13 to form a shape in which the arc of the circle is cut by a straight line, and therefore, the rotary member 70 is rotated by the rotation of the rotary operation shaft 10 Rotate and cause the pawl disc 30 to also be rotated. As a result, the projection 41 of the click spring 40 fixed to the pawl spring support plate 50 is engaged with the radial unevenness of the rotating pawl disk 30, and when the rotational operation shaft 10 is rotated, a click feeling is generated. Further, separation can be caused by sliding contact between the contact pieces 7C1 and 7C2 on the upper and lower sides of the rotary member 70 and the elastic contact members 6C1, 6C2, 6C3 and 8C1, 8C2, and 8C3 of the upper and lower holders.

As can be understood from the above description, in the third embodiment, the contact piece can be determined within 360° in the annular region in which the upper and lower sides of the disc portion of the rotary member 70 are different in the radial direction. The field has the advantage of high design freedom. In other words, the angle range of the opening and closing of the plurality of switches and the relative time point can be increased in accordance with the degree of freedom required for design.

In the third embodiment described above, it is shown that the contact strips 7C1, 7C2 on the upper side and the lower side of the rotary member 70 collectively define the endless belt B1. In the case of B2 and B3, the number and width of the endless belt are limited to the upper side and the lower side, and the number of the elastic contacts of the upper bracket 60 and the lower bracket 80 and the ring that is disposed on the side are arranged. The belt decision can be of course.

[Fourth embodiment]

Fig. 15 is a view showing a fourth embodiment of the rotary switch of the present invention. In the foregoing third embodiment, the lower bracket 80 and the elastic contact members 8C1, 8C2, and 8C3 are integrally formed by insert molding, because the elastic contact members 8C1, 8C2, and 8C3 are intended to be in the window 81. The angle bracket is folded, and the lower side bracket 80 and the pawl spring support plate 50 are formed separately, but the lower bracket 80 can be insert molded in a state where the elastic contact members 8C1, 8C2, and 8C3 are bent at a predetermined angle. At the same time, as shown in Fig. 15, a lower bracket (first bracket) 80' in which the lower bracket 80 and the pawl spring support plate 50 are integrated with each other may be formed. Similarly, the upper bracket 60 and the cover 90 in the third embodiment may be formed as an upper bracket (second bracket) 60' which is integrated with each other as shown in Fig. 15. Since the other configurations are the same as those of the third embodiment, the description thereof is omitted.

[Concept of the invention]

Fig. 16 is a configuration diagram of a rotary operation type electronic component for conceptually showing and explaining various embodiments and modifications of the bearing structure to which the present invention is applied. The cylindrical rotary operating shaft 100 has an operation portion 110 that receives a turning operation, and a smaller diameter and a coaxial extension than the operating portion 110. The holding portion 120 and the driving portion 130 that further reduces the outer diameter from the holding portion 120 and are coaxially extended, the boundary between the operation portion 130 and the holding portion 120 is the formation step portion 110S. The holding portion 120 is a shaft hole 230 that is rotatably inserted into the bearing from one end side of the bearing 200, and the fixing ring 400 fixed to the outer periphery of the rear end portion of the holding portion 120 is at the other end of the bearing 200 and the shaft hole 230. The outer circumference of the card is engaged. The drive unit 130 that is extended from the holding portion 120 rotates the rotary member 700 provided in the motor signal control unit 600 provided at the other end of the bearing 200. The motor signal control unit 600 includes a variable resistance mechanism that generates a change in resistance caused by sliding between the contact member and the resistor body by the rotation of the rotary member 700, or between the elastic contact member and the contact sliding sheet. The rotary switch mechanism that contacts and disengages the generated switching operation controls the signal applied to the terminal 6T by the control of the motor.

The motor signal control unit 600 includes the brackets 6 and 6', the rotors 7 and 7', and the outer casing 22 that accommodates the casings 22 in the first and fourth embodiments, and the implementation of the ninth and fifteenth embodiments. For example, the configuration includes the rotary member 70 housed between the upper brackets 80, 80' and the lower brackets 60, 60'.

In the bearing structure of the present invention, the elastic ring 300 is pressed by the tapered surface 200T which is formed to be larger toward the outer side of the inner peripheral edge of the end portion of the shaft hole of the bearing facing the step portion 100S of the rotational operation shaft 100. The configuration of the stage unit 100S. Here, the surface of the step portion 100S and the outer peripheral surface of the holding portion 120 intersect at right angles, and the tapered surface 200T intersects with the outer peripheral surface of the holding portion 120 by 45°. The radius of a circle in which the tapered surface 200T, the step portion 100S, and the outer peripheral surface of the holding portion are inscribed in the axial direction and which is formed by a right-angled equilateral triangle r, is r = L / 2 tan 67.5 °. However, L is the length of the oblique side of the right-angled equilateral triangle in the cross section (hereinafter referred to as the length of the tapered surface). Therefore, since the elastic ring 300 is elastically deformed by an external force in the axial direction and/or the radial direction of the rotational operation shaft 100, it is necessary that r>L/2tan67.5°. Further, the length L of the tapered surface is D>Lsin45° when the length of the step portion 100S in the radial direction is D.

When the tapered surface 200T is 45°, the ratio of the stress applied from the tapered surface 200T to the elastic ring 300 to the axial direction component and the radial direction component can be changed by changing the inclination angle.

In the modification of Fig. 16A, as shown in Fig. 16B, the tapered surface of the step portion 100S is formed by the elastic ring 300 of the receiving groove 200G which is provided in the inner peripheral edge of the inner peripheral edge of the shaft hole 230. 100T is pressed to form. The other is the same as Fig. 16A.

3‧‧‧Flexible ring

4‧‧‧Fixed ring

6‧‧‧ bracket

6'‧‧‧ bracket

6a‧‧‧Fixed holes

6A‧‧‧ containment recess

6B‧‧‧ bottom

6C‧‧‧Common conductor ring

6C1‧‧‧elastic contacts

6C2‧‧‧elastic contacts

6C3‧‧‧Flexible contacts

6D‧‧‧Axis hole

6R‧‧‧resistors

6T‧‧‧ terminal

6T1‧‧‧ terminals

6T2‧‧‧ terminal

6T3‧‧‧ terminal

7‧‧‧Rotating parts

7'‧‧‧Rotating parts

7A‧‧‧Rotary axis

7'Aa‧‧‧Fixed holes

7B‧‧ Disc Division

7C‧‧‧Sliding contact piece

7'C‧‧‧Sliding contact piece

7'C1‧‧‧Contacts

7C1‧‧‧Upper contact piece

7'C1a‧‧‧Bend

7'C2‧‧‧Contacts

7C2‧‧‧Bottom contact piece

7'C2a‧‧‧Bend

7'Cb‧‧‧ Base

7Cc‧‧‧Common conductor ring

7D‧‧‧Axis hole

7R‧‧‧resistor

8‧‧‧fixed pin

8C1‧‧‧elastic contacts

8T1, 8T2, 8T3‧‧‧ terminals

10‧‧‧Rotating shaft

10S‧‧‧ Stage Department

10T‧‧‧ Cone

11‧‧‧Operation Department

12‧‧‧ Keeping Department

12a‧‧‧ annular groove

13‧‧‧ Drive Department

13a‧‧‧ Plane

20‧‧‧ bearing

20G‧‧‧ Ditch

20T‧‧‧ Cone

21‧‧‧Cylinder

22‧‧‧ Shell

22a‧‧‧Fixed holes

22b‧‧‧Positioning holes

23‧‧‧ containment recess

23a‧‧‧ bottom

24‧‧‧Axis hole

30‧‧‧Pawl round plate

31‧‧‧Axis

32‧‧ ‧ ribs

33‧‧‧Axis hole

33a‧‧‧Axis hole

34‧‧‧Clock wedge

40‧‧‧Pawl spring

41‧‧‧Snap protrusion

42‧‧‧Fixed terminals

50‧‧‧Pawl spring support plate

51‧‧‧Axis hole

52‧‧‧ annular recess

53a‧‧‧Fixed holes

53b‧‧‧Positioning holes

54‧‧‧ positioning protrusion

55‧‧‧ card ditch

60,60'‧‧‧ upper bracket

61‧‧‧ window

62‧‧‧Rotary parts containment recess

63‧‧‧ positioning protrusion

64a‧‧‧Fixed holes

64b‧‧‧Positioning holes

65‧‧‧Clamping convex

66‧‧‧Clamping recess

70‧‧‧Rotating parts

71‧‧‧Rotary axis

72‧‧ ‧ Disc Department

73‧‧‧Axis hole

74‧‧‧Gap section

80,80'‧‧‧ lower bracket

81‧‧‧ window

82‧‧‧Rotary parts containment recess

83‧‧‧ positioning protrusion

84a‧‧‧Fixed holes

84b‧‧‧Positioning holes

85‧‧‧Clamping convex

86‧‧‧Clamping recess

90‧‧‧ Cover

91‧‧‧Axis hole

93a‧‧‧Fixed holes

93b‧‧‧Positioning holes

94‧‧‧ Positioning protrusion

100‧‧‧Rotating shaft

100S‧‧‧ Stage Department

100T‧‧‧ Cone

110‧‧‧Operation Department

110S‧‧‧ Stage Department

120‧‧‧ Keeping Department

130‧‧‧ Drive Department

200‧‧‧ bearing

200G‧‧‧ Ditch

200T‧‧‧ Cone

230‧‧‧ shaft hole

300‧‧‧elastic ring

400‧‧‧Fixed ring

600‧‧‧Motor Signal Control Department

700‧‧‧Rotating parts

[Fig. 1] An exploded perspective view of a rotary switch to which a first embodiment of the present invention is applied.

[Fig. 2] A cross-sectional view in the axial direction of the embodiment of Fig. 1.

[Fig. 3] A perspective view of the bracket 6 in Fig. 1 as seen from the side of the housing recess 23 .

[Fig. 4] An exploded perspective view of a variable resistor to which a second embodiment of the present invention is applied.

[Fig. 5] A cross-sectional view in the axial direction of the embodiment of Fig. 4.

[Fig. 6A] The bracket 6' in Fig. 5 is seen from the side of the housing recess 23 Stereogram.

[Fig. 6B] A plan view of the holder 6' in Fig. 5 as seen from the side of the housing recess 23.

[Fig. 7] A perspective view showing a rotary member 7' according to a modification of the embodiment of Fig. 5.

[Fig. 8] A cross-sectional view in the axial direction showing a modification of the embodiment of Fig. 1.

[Fig. 9] An exploded perspective view of a rotary switch to which a third embodiment of the present invention is applied.

[Fig. 10] A cross-sectional view of the rotary switch of Fig. 9 in the axial direction.

[Fig. 11A] A perspective view of the pawl spring in Fig. 10 and the pawl spring support plate before mounting it.

[Fig. 11B] A perspective view of the pawl spring support plate after the pawl spring is attached.

[Fig. 12A] A plan view of the rotary member in Fig. 10.

[Fig. 12B] A cross-sectional view of the rotary member in Fig. 10.

[Fig. 12C] The lower view of the rotary member in Fig. 10.

[Fig. 13A] A diagram showing a connection pattern of the upper and lower contact pieces in Fig. 10 .

[Fig. 13B] A view showing a sliding contact piece formed by folding a joint pattern.

[Fig. 14A] The lower view of the lower side bracket.

[Fig. 14B] A plan view of the upper bracket.

[Fig. 15] Decomposition of the second embodiment of the rotary switch of the present invention Body map.

[Fig. 16A] A conceptual view for conceptually explaining a bearing structure of the present invention.

[Fig. 16B] A view showing a modification of the bearing structure of Fig. 16A.

6T‧‧‧ terminal

100‧‧‧Rotating shaft

100T‧‧‧ Cone

100S‧‧‧ Stage Department

110‧‧‧Operation Department

120‧‧‧ Keeping Department

130‧‧‧ Drive Department

200‧‧‧ bearing

200G‧‧‧ Ditch

200T‧‧‧ Cone

230‧‧‧ shaft hole

300‧‧‧elastic ring

400‧‧‧Fixed ring

600‧‧‧Motor Signal Control Department

700‧‧‧Rotating parts

Claims (5)

A bearing structure for a rotary operation type electronic component includes: a rotary operation shaft; and a cylindrical operation portion; and a holding portion that extends in the axial direction by forming a step portion from one end of the operation portion And a driving portion that is further extended from the holding portion in the axial direction; and the bearing has a shaft hole through which the holding portion is inserted and rotatably held by the holding portion, and one end faces the step portion; The other end of the bearing is provided with a motor signal control unit that performs signal control by rotation of a rotating member fixed to the driving portion, and the bearing has an inner diameter formed at an inner circumference of the shaft hole at the one end thereof. The tapered surface that is enlarged outward is elastically held between the tapered surface and the step portion, and the elastic ring is attached to the holding portion, and is formed in a ring shape formed on the outer circumference of the end portion of the holding portion on the side of the driving portion. The groove is provided with a fixing ring, and the rotating operation shaft is stopped by being engaged with the other end of the bearing. A bearing structure for a rotary operation type electronic component includes: a rotary operation shaft; and a cylindrical operation portion; and a holding portion that extends in the axial direction by forming a step portion from one end of the operation portion And a drive unit extending further from the holding portion in the axial direction; and the bearing having a shaft hole through which the holding portion is inserted and rotatably held by the holding portion, and one end facing the step portion; the bearing The other end is provided with a motor signal control unit that performs signal control by rotation of a rotating member fixed to the driving portion, and an outer diameter is formed from the intermediate portion of the radial direction toward the intermediate portion at the stage portion. The direction of the driving portion is reduced to a tapered surface on the outer circumference of the holding portion, and the bearing has a receiving groove having an inner diameter formed at an inner peripheral edge of the shaft hole at the one end thereof, and is elastically held by the bearing groove An elastic ring is attached to the holding portion between the tapered surface and the receiving groove, and a fixing ring is attached to the annular groove formed on the outer periphery of the end portion of the holding portion on the side of the driving portion, and the bearing ring is provided The other end is engaged so that the above-mentioned rotational operation shaft is stopped. The bearing structure of claim 1 or 2, wherein the motor signal control unit includes a rotary switch mechanism. The bearing structure of claim 1 or 2, wherein the motor signal control unit includes a variable resistance mechanism. A bearing structure according to claim 1 or 2, wherein the elastic ring is formed of a resin of a rubber material.