JP2016121755A - Heavy torque type rotary electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heave torque type rotary electronic component capable of making rotational torque in rotating a shaft into rotational torque having desired large viscosity, with a simple structure.SOLUTION: A heavy torque type rotary electronic component 1 includes a rotor 30, detection means 20 changing detection output by the rotor 30, and a shaft 10 projecting form the upper surface of the rotor 30 and rotating integrally with the rotor 30. In the shaft 10, a shaft part 15 having an outer diameter dimension larger than the outer diameter dimension of the shaft 10. While, a bearing part 41 rotatably pivoting the shaft part 15 is installed. A gap between the shaft part 15 and the bearing part 41 is filled with a viscous material having semi-fluidity for torque drawing, and rotational torque of the shaft 10 is made into a desired large rotational torque.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heavy torque type rotary electronic component capable of applying a desired large torque to rotation of a rotating body.

  Conventionally, rotary electronic components such as a rotary encoder have a rotating body mounted on a base so as to be freely rotatable, a case is placed on the rotating body, and a shaft (rotating shaft) that rotates integrally with the rotating body protrudes from the case. The rotating body is rotated by rotating the shaft, and the detection output of a detecting means such as a slider provided between the rotating body and the base is changed.

  In this type of rotary electronic component, there is a torque output mechanism that increases the rotation of the shaft, specifically, the rotation of the shaft is sticky (viscous), and a desired large rotational torque may be required. It was. As an example of this torque output mechanism, there is a torque output mechanism disclosed in Patent Document 1. In this torque output mechanism, an O-ring is interposed between the upper surface of the rotating body and the case, the O-ring is pressed and deformed by the case, and the elastic force of the O-ring (the restoring force that the O-ring tries to restore) ) To press the rotating body, generate a frictional force between the rotating body and the base (slider fixing plate in Patent Document 1), and thereby a desired large viscous torque to rotate the rotating body. Like to get. As another heavy torque output mechanism, a viscous grease is applied between the shaft of the rotary electronic component and the bearing portion thereof, and the rotation of the shaft is heavy and sticky due to the viscosity of this grease. there were.

JP 2001-349362 A

  However, the torque output mechanism disclosed in Patent Document 1 presses the O-ring and presses the rotating body against the base (slider fixing plate) with its elastic force. Also, the pressing force (the force that excessively presses the slider etc. against the base) is applied to the slider etc. installed in between, and the slider is damaged due to repeated rotation (so-called “sag” etc.) There was a problem of doing. In addition, the method of applying grease between the shaft and the bearing portion has a problem that it is difficult to produce a large rotational torque because the area of application of the grease is small.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a heavy torque type rotary electronic device capable of making a rotational torque when rotating a shaft a desired large rotational torque with a simple configuration. To provide parts.

In order to solve the above-described problems, the present invention includes a rotating body, a detecting unit that changes a detection output by the rotation of the rotating body, and a shaft that protrudes from the upper surface of the rotating body and rotates integrally with the rotating body. In the rotary electronic component, the shaft is provided with a shaft portion having an outer diameter size larger than the outer diameter size of the shaft, and a bearing portion that pivotally supports the shaft portion is installed. And a viscous material having a semi-fluidity for torque generation is filled between the bearing portion and the bearing portion.
According to the present invention, the viscous material is filled between the shaft portion and the bearing portion arranged at an outer diameter position larger than the outer diameter size of the shaft. Therefore, the rotational torque when the shaft is rotated can be easily set to a desired large rotational torque.

  In the present invention, the shaft portion is provided in a cylindrical shape at a position surrounding the shaft away from the outer peripheral side surface of the shaft in the radial direction, while the bearing portion is provided on the outer peripheral side or inner periphery of the shaft portion. It is preferable that it is installed on the side. Accordingly, the outer diameter of the shaft portion and the bearing portion can be easily increased with a simple structure.

  In the present invention, it is preferable that the bearing portion and the shaft portion are installed in a bearing storage case that covers them. Thereby, a bearing part, a shaft part, and a viscous material can be easily protected.

  In the present invention, it is preferable that the rotating body and the detection means are accommodated in a main body case, and the main body case and the bearing storage case are laminated and integrated. By stacking the main body case and the bearing housing case in this manner, this heavy torque type rotary electronic component can be easily configured.

  In the present invention, it is preferable that the shaft and the rotating body are configured as separate parts, and are engaged so as to be integrally rotatable in a state where the bearing housing case is stacked on the main body case. Thus, the heavy torque type rotary electronic component can be easily assembled by integrating the main body case and the bearing storage case while integrating them separately.

  According to the present invention, the rotational torque when rotating the shaft can be set to a desired large rotational torque with a simple configuration.

1 is an external perspective view of a heavy torque rotary electronic component 1. FIG. It is the external appearance perspective view which looked at the heavy torque type | mold rotary electronic component 1 from the downward direction. 1 is a side sectional view showing a schematic configuration of a heavy torque type rotary electronic component 1. 1 is an exploded perspective view of a heavy torque type rotary electronic component 1. FIG. It is the disassembled perspective view which looked at the heavy torque type | mold rotary electronic component 1 from the downward direction. It is a sectional side view which shows schematic structure of the heavy torque type | mold rotary electronic component 1-2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 are views showing a configuration of a heavy torque type rotary electronic component 1 according to an embodiment of the present invention. FIG. 1 is an external perspective view, FIG. 2 is an external perspective view from below, and FIG. 4 is an exploded perspective view, and FIG. 5 is an exploded perspective view seen from below. As shown in these drawings (particularly FIG. 3), the heavy torque type rotary electronic component 1 includes a rotary drive unit 3 that rotates the rotary electronic component body 2 on the rotary electronic component body 2. The bearing mechanism portion 4 is installed, and these members are integrally attached by an assembly frame body 70 (see FIG. 3).

  Here, the rotary electronic component main body 2 includes a main body case 60, and the main body case 60 has a configuration in which the rotating body 30, the detection means 20 that changes the detection output by the rotation of the rotating body 30, and the like are arranged. It is. The rotation drive unit 3 includes a rotating shaft 10, and the rotating body 30 of the rotary electronic component main body unit 2 is rotated by rotating the rotating shaft 10 about the axis thereof. Further, as will be described in detail later, a bearing mechanism portion 4 including a shaft portion 15 and a bearing portion 41 is disposed at an outer peripheral position in a predetermined range in the vertical direction of the shaft 10.

  The shaft 10 is an integrally molded product of synthetic resin, and has a step portion 11 for forming a portion with an increased outer diameter below, and a circular plate-shaped shaft portion support that is positioned below the step portion 11 and has an increased outer diameter. A step portion 13 for forming a body 12, a portion located below the shaft support 12 and having a reduced outer diameter (substantially the same as the outer diameter of the shaft 10), and an outer diameter located below the step portion 13. And a stepped portion 17 for forming the protruding portion 14 having a significantly reduced height. A cylindrical shaft portion 15 having an inner diameter larger than the outer diameter of the shaft 10 is formed integrally with the shaft support 12 on the upper surface of the shaft support 12. As shown in FIG. 3, a cylindrical bearing 41 is disposed so as to surround the outer periphery of the shaft portion 15, and the bearing 41 is attached to the bearing case 43 through a lid 40 as will be described in detail later. It is fixed. That is, when the shaft portion 15 is rotated with the shaft 10 as the center of rotation, the shaft portion 15 is pivotally supported by the bearing portion 41. That is, the shaft mechanism 15 and the bearing portion 41 constitute the bearing mechanism portion 4.

  The bearing mechanism portion 4 including the shaft portion 15 and the bearing portion 41 is disposed in a synthetic resin bearing portion case 43 having a rectangular box shape and the upper portion is opened. The upper end opening of the bearing portion case 43 is rectangular. The cover 40 is made of synthetic resin. The bearing portion 41 is integrally formed on the lower surface of the lid body 40. By covering the upper end opening of the bearing portion case 43 with the lid body 40, the bearing portion 41 is minute on the outer peripheral side of the shaft portion 15. It is positioned and arranged so as to be positioned with a gap.

  The bearing case 43 and the lid 40 constitute a bearing housing case 45 that houses the bearing mechanism portion 4 therein. The inside of the bearing storage case 45 is a sealed space, and foreign matter enters the gap between the shaft portion 15 and the bearing portion 41 of the bearing mechanism portion 4 without entering the foreign matter from the outside, or the viscous material filled in the gap. There is no change in the viscosity. The gap between the shaft portion 15 and the bearing portion 41 is filled with a viscous material (such as grease) having semi-fluidity as described above. A cylindrical tube portion 44 having a shaft through hole 44 a through which the shaft 10 passes is formed integrally with the lid body 40 at the center of the lid body 40.

  As shown in FIGS. 4 and 5, the rotating body 30 has a substantially disc shape, and a through hole 30 a through which the protrusion 14 at the lower end of the shaft 10 passes is formed at the center thereof. Plural (two in the figure) columnar protrusions 31 and 31 for insertion and locking into a plurality (two in the figure) of the rotating body locking holes 16 (see FIG. 5) formed on the lower end surface of the shaft 10. (See FIG. 4).

  An annular slider 50 in which a plurality (three in the figure) of sliding booklets 51 are formed is attached to the lower surface of the rotating body 30. That is, a plurality of (three in the figure) protrusions 32, 32, 32 for attaching the slider 50 are provided on the lower surface of the rotating body 30, and the protrusion 32 is provided on the annular portion of the slider 50. A plurality of (three in the figure) through-holes 50a, 50a, 50a are formed, and the protrusion 32 is inserted into the through-hole 50a when the slider 50 is brought into contact with the lower surface of the rotating body 30. The slider 50 is attached to the lower surface of the rotating body 30 by thermally crimping each protrusion 32. The slider 50 is made of an elastic metal plate, and the rotating body 30 is made of a resin material.

  The rotating body 30 to which the slider 50 is attached is disposed in the main body case 60 with the slider 50 facing downward. A circuit board (flexible circuit board) in which sliding contact patterns 61-1 and 61-2 that contact the sliding booklet 51 of the slider 50 are formed on the inner bottom surface of the main body case 60 by rotating the rotating body 30. 60 is insert-molded. These sliding contact patterns 61-1 and 61-2 and the slider 50 constitute a detecting means 20 whose detection output changes due to the rotation of the rotating body 30. The sliding contact patterns 61-1 and 61-2 may be configured as a switch pattern or a resistor pattern. The detection output of the sliding contact patterns 61-1 and 61-2 passes through the terminals 62-1 to 62-3 electrically connected to the sliding contact patterns 61-1 and 61-2 and is output to the outside of the main body case 60. Is output.

  A cylindrical engagement protrusion 34 to be inserted into a rotation body engagement hole 64 formed at the center of the inner bottom portion of the main body case 60 is formed at the center of the lower surface of the rotation body 30. The rotating body 30 is rotatably supported in the main body case 60 by inserting 34 into the rotating body engaging hole 64.

  The assembly frame 70 assembles the shaft 10, the lid body 40, the bearing case 43, and the main body case 60 that houses the rotating body 30 to which the slider 50 is attached. The assembling frame body 70 is formed by punching a metal plate into a predetermined shape and pressing and bending the opposing side portions of the bottom portion 71 at a right angle upward to form a pair of side walls 72, 72. A pair of side walls 74, 74 are formed by bending both sides downward at a right angle. Engagement claw portions 73 and 73 are formed on both sides of the upper end side of each side wall 72, and bent claw portions 75 and 75 are formed on both sides of the lower end side of each side wall 74. An attachment claw 77 for attaching the heavy torque type rotary electronic component 1 to another device, equipment, or the like is formed in the middle.

  In order to assemble the heavy torque type rotary electronic component 1, grease (viscous material having semi-fluidity) is applied to at least one of the outer peripheral surface of the shaft portion 15 and the inner peripheral surface of the bearing portion 41 in advance. Keep it. Further, the slider 50 is attached to the lower surface of the rotating body 30 as described above. 4 and 5, the shaft 10 integrally formed with the shaft portion 15 and the like is accommodated in the bearing portion case 43 with the shaft portion support 12 facing downward. At this time, the lower end portion of the shaft 10 (the portion located below the step portion 13 and above the projection portion 14) is inserted into the shaft locking hole 43 a of the bearing portion case 43. In this state, the lid body 40 is placed on the upper end portion of the bearing case 43 while passing the shaft 10 through the shaft through hole 44 a of the lid body 40. As a result, the locking protrusions 46 provided on the upper end of the bearing case 43 are inserted into the case locking holes 40 b formed in the diagonal portions of the lid 40, and the cylindrical portion 44 is inserted into the step portion 11 of the shaft 10. The lower end touches. As a result, the bearing mechanism portion 4 composed of the shaft portion 15 and the bearing portion 41 is positioned and arranged at a predetermined position in the bearing housing case 45, and at the same time, the entire space between the shaft portion 15 and the bearing portion 41 is filled with grease. It will be.

  Next, an assembly in which the shaft 10, the lid body 40 and the bearing case 43 are assembled is placed on the upper surface of the bottom 71 of the assembly frame 70. Then, the assembly body of the shaft 10, the lid body 40, and the bearing case 43 is assembled to the assembly frame body by bending a plurality of (four in the figure) locking claws 73 of the assembly frame body 70 on the upper surface of the lid body 40. Assemble to 70.

  Next, the rotating body 30 to which the slider 50 is attached is disposed on the lower surface of the bottom portion 71 of the assembly frame body 70, and at this time, the protrusion formed at the lower end of the shaft 10 in the through hole 30 a of the rotating body 30. 14 and the protrusions 31 and 31 formed on the upper surface of the rotating body 30 are inserted into the rotating body locking holes 16 and 16 (see FIG. 5) formed on the lower end surface of the shaft 10. Next, the main body case 60 is disposed on the lower side of the rotating body 30. At this time, the cylindrical protrusions 65, 65 provided on the upper end of the main body case 60 are assembled while the rotating body 30 is assembled in the main body case 60. The main body case 60 is positioned by being inserted into the locking holes 76 and 76 formed in the bottom 71 of the frame body 70. Then, the main body case 60 is assembled to the assembly frame body 70 by bending the bent claw portions 75 and 75 of the assembly frame body 70 to the lower surface of the main body case 60. Thus, the assembly of the heavy torque type rotary electronic component 1 is completed.

  In the heavy torque rotary electronic component 1 configured as described above, when the shaft 10 is rotated, the rotating body 30 and the slider 50 are rotated integrally therewith, and the sliding booklet 51 is slid into the sliding contact pattern 61-. 1, 61-2, and the detection output between the terminals 62-1 to 62-3 changes.

  On the other hand, in the heavy torque rotary electronic component 1, the shaft 10 is provided with a shaft support 12 having an outer diameter larger than the outer diameter of the shaft 10, and the shaft 10 is provided on the upper surface of the shaft support 12. A shaft portion 15 having an outer diameter size larger than the outer diameter size is provided, a cylindrical bearing portion 41 is disposed on the outer peripheral side of the shaft portion 15, and the bearing portion 41 is placed on a bearing portion case 43 on the fixed side via a lid 40. The shaft portion 15 and the bearing portion 41 are filled with a viscous material having semi-fluidity such as grease. For this reason, the application area of the viscous material can be increased, and at the same time, the radius from the center of the shaft 10 to the position where the viscosity is given by the viscous material is increased. The force required to rotate the shaft 10 can be made large, heavy and sticky.

  The rotational torque of the shaft 10 necessary for rotating the rotating body 30 includes the radial dimensions of the outer peripheral surface of the shaft portion 15 and the inner peripheral surface of the bearing portion 41, and the outer peripheral surface of the shaft portion 15 and the inner peripheral surface of the bearing portion 41. And the viscosity of a viscous material such as grease. Here, as described above, the radial dimension of the outer peripheral surface of the shaft part 15 and the inner peripheral surface of the bearing part 41 is made larger than the radial dimension of the shaft 10, and the areas of the outer peripheral surface of the shaft part 15 and the inner peripheral surface of the bearing part 41 are also set. For example, even if the viscosity of the viscous material is not large, it is possible to obtain a large stable rotational weight.

  Moreover, since the force for pressing the rotating body 30 to the inner bottom surface side of the main body case 60 of the rotary electronic component main body 2 does not act, the sliding booklet 51 of the slider 50 is pressed to the inner bottom surface side of the main body case 60. Therefore, the risk of breakage of the sliding booklet 51 (so-called “sag” etc.) due to repeated rotation of the rotating body 30 is minimized. Further, since the bearing mechanism portion 4 constituted by the shaft portion 15 and the bearing portion 41 and the like is housed and disposed in a sealed space in the bearing housing case 45 constituted by the bearing portion case 43 and the lid body 40, the sealed space. When a foreign object enters the inside and changes the viscosity of a viscous material such as grease filled in the gap between the shaft portion 15 and the bearing portion 41, or the foreign material enters the gap and the rotational weight of the rotating body 30 is increased. That is, the rotational torque for rotating the shaft 10 is not changed.

  Further, in the heavy torque type rotary electronic component 1, the shaft 10 and the rotating body 30 are configured as separate components, and the main body case 60 is engaged with the main body case 60 so as to be integrally rotatable with the bearing housing case 45 being laminated. While assembling the case 60 and the bearing storage case 45 separately, they can be assembled easily by integrating them.

  In addition, in the said embodiment, although the axial part 15 is arrange | positioned on the inner peripheral side of the bearing part 41, you may arrange | position the axial part 15 on the outer peripheral side of the bearing part 41 on the contrary. Moreover, in the said embodiment, although the bearing part 41 was provided in the cover body 40, the cylindrical bearing part 41 is standingly arranged toward the upper direction on the inner bottom face of the bearing part case 43, and, on the other hand, a shaft part The support body 12 may be provided above the shaft 10, and the shaft portion 15 may be suspended downward from the lower surface thereof, and the bearing mechanism portion 4 may be configured by the bearing portion 41 and the shaft portion 15. At this time, since the bearing portion 41 is not required for the lid body 40, the lid body 40 is configured as a part of the assembly frame body 70, and the shaft 10 penetrates the shaft 10 through a part of the assembly frame body 70. A hole 44a may be provided.

  FIG. 6 is a side sectional view showing a schematic configuration of a heavy torque type rotary electronic component 1-2 according to another embodiment. That is, the shaft portion 15 and the bearing portion 41 are not limited to one each, and a plurality of the shaft portions 15 and the bearing portions 41 are respectively provided as in the heavy torque type rotary electronic component 1-2 shown in FIG. In FIG. 6, the shaft portions 15-1, 15-2 and 15-3, and the bearing portion 41 may be provided as three units 41-1, 41-2 and 41-3. And between each shaft portion 15 and the bearing portion 41 (in FIG. 6, between the shaft portion 15-1 and the bearing portion 41-1, between the shaft portion 15-2 and the bearing portion 41-2, and between the shaft portion 15-3 and Between the bearing portions 41-3) is filled with a viscous material having semi-fluidity such as grease. Thereby, it becomes possible to obtain a heavier sticky rotational torque.

  In this heavy torque type rotary electronic component 1-2, no viscous material is filled between the shaft portion 15-1 and the bearing portion 41-1, that is, the shaft portion 15-2 and the bearing portion 41-2. And between the shaft portion 15-3 and the bearing portion 41-3, or if only one of them is filled with the viscous material, the space between the shaft portion 15-1 and the bearing portion 41-1 It is possible to reliably prevent the viscous material from leaking (into the bearing portion case 43), thereby maintaining the heavy rotational torque for a long period of time. Of course, if a cylindrical viscous material outflow prevention wall (not shown) directed upward is provided on the outer periphery of the shaft support 12, the viscous material between the shaft 15-1 and the bearing 41-1 is externally provided. (This also applies to the heavy torque rotary electronic component 1).

  Further, for example, the shaft portion 15-2 and the shaft portion 15-3 (or alternatively, the bearing portion 41-2 and the bearing portion 41-3) are arranged in a vertical direction at one or a plurality of portions of a cylinder constituting them. It is good also as a shape which notched toward the direction, ie, the shape which has arrange | positioned the several circular arc board (plate body) on the same periphery via the clearance gap. If comprised in this way, when rotating the shaft 10, a viscous material will be scraped off at the notched edge part of the axial part 15-2 or the axial part 15-3 (or the bearing part 41-2 or the bearing part 41-3). Therefore, the amount of viscous material between the shaft portion and the bearing portion is not biased, and a heavy and stable rotational torque can be obtained.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above example, synthetic resin molded products are used as the material of the shaft 10, the lid 40, the bearing case 43, etc., but these may be made of metal or the like. In the above example, the detection unit is configured by the slider 50 and the sliding contact patterns 61-1 and 61-2. However, any other configuration is possible as long as the detection unit changes the detection output by the rotation of the rotating body 50. It may be a detecting means. In the above example, the shaft portion 15 is formed in a cylindrical shape surrounding the shaft 10, but it may be formed by increasing the outer diameter of the shaft 10 as it is. In the above example, the shaft 10 and the rotating body 30 are configured as separate parts in order to facilitate assembly. However, they may be configured integrally (for example, by integral molding).

DESCRIPTION OF SYMBOLS 1 Heavy torque type | mold rotary electronic component 2 Rotary electronic component main-body part 3 Rotation drive part 4 Bearing mechanism part 10 Shaft 12 Shaft part support body 15 Shaft part 16 Rotating body latching hole 20 Detection means 30 Rotating body 40 Cover body 41 Bearing Part 43 Bearing part case 45 Bearing housing case 50 Slider 60 Body case 70 Assembly frame 71 Bottom part 72 Side wall 74 Side wall

Claims (5)

A rotating body,
Detection means for changing detection output by rotation of the rotating body;
In a rotary electronic component comprising a shaft that protrudes from the upper surface of the rotating body and rotates integrally with the rotating body,
The shaft is provided with a shaft portion having an outer diameter larger than the outer diameter of the shaft,
On the other hand, a bearing portion that pivotally supports the shaft portion is installed,
A heavy-torque rotary electronic component characterized in that a viscous material having semi-fluidity for torque generation is filled between the shaft portion and the bearing portion. The heavy torque rotary electronic component according to claim 1,
The shaft portion is provided in a cylindrical shape at a position surrounding the shaft away from the outer peripheral side surface of the shaft in a radially outward direction,
On the other hand, the bearing part is installed on the outer peripheral side or the inner peripheral side of the shaft part. The heavy torque rotary electronic component according to claim 1 or 2,
The heavy torque rotary electronic component according to claim 1, wherein the bearing portion and the shaft portion are installed in a bearing housing case that covers them. The heavy torque rotary electronic component according to claim 3,
The rotating body and the detection means are housed in a main body case,
A heavy torque type rotary electronic component, wherein the main body case and the bearing housing case are laminated and integrated. The heavy torque rotary electronic component according to claim 4,
The heavy torque type rotary electronic component, wherein the shaft and the rotating body are configured as separate components and are engaged with each other so as to be integrally rotatable in a state where the bearing housing case is stacked on the main body case.

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