JP2003045705A - Rotating electrical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide rotating electrical components, the assembling work of which can be carried out easily with accuracy, without using high-accuracy positioning jigs by contriving the shape of the rotating body. SOLUTION: The rotating electrical components are provided with an operating shaft 12 rotatably journaled by a fixing member 5 and the rotating body 8, which is attached to the shaft 12 and outputs electrical signals while the body 8 rotates, together with the shaft 12. The operation shaft 12 has a small- diameter section 12a, formed at its rear end and a large-diameter section 12b, which is positioned on the front side of the section 12a and has a diameter larger than that of the section 12a. The rotating body 8 has a small-diameter hole 8f, made on its rear end side and a large-diameter hole 8e which is positioned on the front side of the hole 8f communicatingly with the hole 8f and has a diameter larger than that of the hole 8f. The rotating body 8 is attached to the operation shaft 12 by inserting the small-diameter section 12a of the shaft 12 into the small-diameter hole 8f of the rotating body 8 through the large-diameter hole 8e of the body 8, and at the same time, by press- contacting the large-diameter section 12b with the large-diameter hole 8e.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric component such as an encoder and a variable resistor, which is preferably used in electronic equipment such as television and video.

[0002]

2. Description of the Related Art To explain a drawing of a conventional rotary electric component, FIG. 10 is a sectional view of a main part of the conventional rotary electric component.

A conventional rotary electric component will be described with reference to FIG. 10. The insulating substrate 51 has a circular thin plate shape.
A resistor and a current collector (not shown) are formed on the front surface.

The fixing member 52 is made of a metal material, and has a circular thin plate-shaped upper wall portion 52a, and a side wall portion 52b formed downward from a side edge portion of the upper wall portion 52a.
The upper wall portion 52a has a bearing portion 52d having a through hole 52c formed so as to project forward from the central portion, and a protrusion 52e formed so as to project rearward from the upper wall portion 52a in the vicinity of the bearing portion 52d. is doing.

An attachment plate 54 is attached to the fixing member 52 via a spacer 53 by engaging a not-shown claw portion with the upper wall portion 52a, and an insulating substrate is attached to the front surface of the attachment plate 54. 51 is in a mounted state.

The rotating body 55 is made of a synthetic resin molding, and has a substantially cylindrical base portion 55a, an oval mounting hole 55b formed at the center of the base portion 55a, and a radial extension from the base portion 55a. Circular portion 55c and the circular portion 55c
The circular portion 5 has a plurality of concave and convex portions 55d formed above.
A slider 55e is embedded in the rear surface of 5c.

The click spring 56 is made of a thin metal material, has a substantially ring shape, and has a convex portion 56a protruding rearward from the arm portion. The click spring 56 is caulked on the protrusion 52e of the fixing member 52. The convex portion 56a is elastically contacted with the concave and convex portion 55d of the rotating body 55.
Then, as the rotator 55 rotates, the protrusion 56a
Is repeatedly engaged with and disengaged from the concavo-convex portion 55d, and a click feeling is generated.

The operating shaft 57 is made of a metal material and has a knob 5
7a, a collar portion 57b connected to the knob portion 57a and larger than the outer dimension of the knob portion 57a, a fitting portion 57c extending rearward from the collar portion 57b, and an oval shape provided at the tip of the fitting portion 57c. 57d of the picking part and the picking part 5
It has an axially thin guide portion 57e formed at the tip of 7d.

The operating shaft 57 is inserted from the front side into the through hole 52c of the bearing portion 52d of the fixing member 52, and the collar portion 5 is formed.
7b is pushed until it comes into contact with the front end of the bearing 52d. Specifically, as the operation shaft 57 is inserted, the fitting portion 57c is press-fitted into the mounting hole 55b of the rotating body 55, and the fitting portion 57c and the mounting hole 55b are in a strong fitting state. Then, the guide portion 57e is inserted into the guide hole 54a formed at the center of the mounting plate 54. This operation axis 5
In the mounting work of No. 7, since the fitting portion 57c and the mounting hole 55b have the same shape, the both are in a strong fitting state from the vicinity of the inlet of the mounting hole 55b. Therefore, the fitting portion 57c is mounted. It must be pressed into hole 55b. Therefore, it is necessary to mount the operation shaft 57 by press fitting while the fitting portion 57c and the mounting hole 55b are positioned and held in the radial direction by a highly accurate positioning jig.

The conventional rotary electric component has the above-mentioned structure, and by rotating the operating shaft 57, the rotating body 55 rotates together with the operating shaft 57 and the slider 55e slides on the resistor. By moving, the resistance value changes, and the output voltage changes.

[0011]

The conventional rotary type electric component has the above-mentioned structure and operation, but when the operation shaft 57 is attached, the fitting portion 57c and the attachment hole 55b are diametrically fixed. Since it has to be press-fitted in a state where it is positioned and held, there is a problem that the work is complicated and the mass productivity deteriorates.

The present invention has been made in view of the above problems, and by devising the shapes of the operating shaft and the rotating body, the assembling work can be performed accurately and easily without using a highly accurate positioning jig. It is an object of the present invention to provide a rotary electric component that can be performed.

[0013]

As a first means for solving the above problems, a rotary electric component of the present invention is provided with an operating shaft rotatably supported by a fixing member and attached to the operating shaft. And a rotating body that rotates together with the operation shaft and outputs an electric signal, the operation shaft being located at the small diameter portion formed at the rear end and at the front side of the small diameter portion and having a diameter smaller than that of the small diameter portion. And a large-diameter portion having a large diameter, the rotating body has a small-diameter hole formed on the rear end side, and a large-diameter hole communicating with the small-diameter hole and located on the front side and having a larger diameter than the small-diameter hole. The small diameter portion is inserted into the small diameter hole via the large diameter hole, and the large diameter portion is pressed against the large diameter hole, so that the rotating body is attached to the operation shaft. It has been configured.

As a second solving means, a convex portion is provided in the large diameter hole of the rotating body of the rotary electric component of the present invention, and the large diameter portion of the operating shaft is the convex portion. In the crushed state, the pressure sensor is fixedly attached to the large diameter hole.

As a third means for solving the problems, the rotary electric component according to the present invention is configured such that the projections are formed so as to extend in the axial direction of the operation shaft and to be opposed to each other. .

As a fourth solution, the large-diameter hole of the rotary electric component of the present invention has an oval shape, and the projections are provided at four corners of the large-diameter hole. .

As a fifth solving means, the convex portion provided in the large diameter hole of the rotary electric component of the present invention is provided in the vicinity of the small diameter hole, and the large diameter portion is the convex portion. Before crushing, the small diameter portion is configured to be inserted into the small diameter hole.

As a sixth means for solving the problems, the rotary electric component of the present invention is configured such that the small-diameter portion and the small-diameter hole are fitted in close contact with each other.

As a seventh solving means, a taper portion is provided in a step portion between the large diameter portion and the small diameter portion of the operation shaft of the rotary electric component of the present invention, and the rotating body has the small diameter portion. Between the hole and the large diameter hole, a step portion orthogonal to the axial direction is provided, and in the state where the large diameter portion is pressed and fixed to the large diameter hole, between the taper portion and the step portion. The space portion is formed.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to the drawings of the rotary electric component of the present invention, FIG. 1 is a sectional view of a main part of the rotary electric component of the present invention, and FIG. 2 is a rotation of the rotary electric component of the present invention. The figure which looked at the body from the front side, FIG. 3 is the figure which looked at the rotary body of the rotary electric component of this invention from the rear side, and FIG. 4 is the expansion showing the convex part of the rotary body concerning the rotary electric component of this invention. Fig. 5 and Fig. 2
5 is a sectional view taken along line 5-5, FIG. 6 is a perspective view of a click spring of the rotary electric component of the present invention, FIG. 7 is a front view of an operating shaft of the rotary electric component of the present invention, and FIG. 8 is a rotation of the present invention. FIG. 9 is a view of the operation shaft of the mold electric component as viewed from the rear side, and FIG. 9 is an explanatory view showing the process of inserting the operation shaft of the rotary electric component of the present invention.

The rotary electric component of the present invention will be described with reference to FIGS. 1 to 9. The bottom wall portion 1 is made of a synthetic resin molded product and has a thin disk shape. A thin plate-shaped metal body having a slider 2 and a terminal portion 3 that is electrically connected to the slider 2 is embedded in the reference numeral 1. The slider 2 is projected forward from the front surface of the bottom wall portion 1, and the terminal portion 3 is projected from the side surface of the bottom wall portion 1.

The cylindrical portion 4 is made of a synthetic resin molded product,
It has a cylindrical base portion 4a and a step portion 4b that is formed from a substantially middle portion of the base portion 4a toward the center and extends in the circumferential direction, and is arranged so as to surround the bottom wall portion 1. .

The fixing member 5 is a bearing made of a metal material and having a circular thin plate-shaped upper wall portion 5a and a through hole 5b formed so as to project forward from the central portion of the upper wall portion 5a. It has a portion 5c, a claw receiving portion 5d which is a concave portion formed on the front surface of the upper wall portion 5a, and a protrusion 5e formed so as to project from the rear surface of the upper wall portion 5a.

The mounting plate 6 is made of a thin metal plate and has a substantially disc-shaped receiving portion 6a, four claw portions 6b extending forward from the receiving portion 6a, and a rear portion of the receiving portion 6a. And a mounting leg 6c formed so as to extend. This mounting plate 6
By engaging the claw receiving portion 5d of the fixing member 5 with the claw portion 6b extending forward, the bottom wall portion 1 and the cylindrical portion 4 are held together with the fixing member 5. Specifically, the receiving portion 6a is in contact with the rear surface of the bottom wall portion 1 and is in contact with the rear surface of the step portion 4b of the cylindrical portion 4. Thus, the bottom wall portion 1, the cylindrical portion 4, and the fixing member 5 form a cylindrical storage portion 7.

The rotating body 8 is made of a synthetic resin molding,
A substantially disk-shaped circular portion 8a, an oval mounting hole 8b formed in the center of the circular portion 8a, and a front surface of the circular portion 8a formed around the mounting hole 8b at about 300 degrees. It has a grooved portion 8c and a plurality of uneven portions 8d formed in the radial direction near the outer periphery of the circular portion 8a. The mounting hole 8b is
An oval large-diameter hole 8e from the front, and an oval small-diameter hole 8f having a diameter smaller than that of the large-diameter hole 8e, and a large-diameter hole 8e connected to the large-diameter hole 8e. And a step portion 8g formed in the radial direction.
Further, as shown in FIGS. 4 and 5, in the vicinity of the small diameter hole 8f, in the present embodiment, a convex portion 8h is formed so as to extend from the step portion 8g to the front side, and the convex portion 8h is formed in the large diameter hole 8e. Are formed in the four corners.

Although the convex portion 8h has an elongated shape in the present embodiment, it is not limited to this shape and may be a simple protrusion. Further, a plurality of protrusions may be scattered or arranged side by side so as to form one line.

The insulating substrate 9 is made of a thin disk and has a recess 9a formed by recessing from the outer edge, and a plurality of patterns 10 are formed by printing on the rear surface as shown in FIG. . As shown in FIG. 3, the insulating substrate 9 has a recess 9a.
Is attached to the rear surface of the rotating body 8 in a state of being engaged with the claw portion 8k of the rotating body 8 to be integrated.

The click spring 11 is made of a thin metal material, and as shown in FIG. 6, is formed into a flat plate-shaped base 11a and a pair of bases 11a inclined from the base 11a. Bent portion 11b and one bent portion 11b
It has a convex portion 11c protruding rearward from the tip, a through hole 11d formed in the center, and a rectangular hole 11e formed between the through hole 11d and the convex portion 11c.

The rotating body 8 in which these insulating substrates 9 are integrated and the click spring 11 are housed in the housing portion 7, and the base body 11a of the click spring 11 is the upper wall portion 5a of the fixing member 5.
When the bending piece 11b elastically presses the rotating body 8, the vicinity of the outer edge on the rear side of the rotating body 8 is biased and held by the front surface of the step portion 4b of the cylindrical portion 4. There is. Also,
The protrusion 5e of the fixing member 5 is the rectangular hole 1 of the click spring 11.
It penetrates through 1e so that the click spring 11 does not shift. Further, the protrusion 5e is in a state of being located inside the concave streak portion 8c of the rotating body 8. Thus, when the rotating body 8 with the insulating substrate 9 integrated is held, the slider 2 comes into contact with the insulating substrate 9 and the rotating body 8 rotates, so that the pattern 10 and the slider 2 are separated from each other. A pulse signal is output from the terminal unit 3 by repeating contact and non-contact. When the rotating body 8 rotates, the click spring 1
The convex portion 11c of No. 1 is repeatedly engaged with and disengaged from the concave-convex portion 8d of the rotating body 8 to generate a click feeling.

The operating shaft 12 is made of a metal rod-shaped body,
Small diameter portion 12a formed on the rear end side and the small diameter portion 12a
From the large diameter portion 12a to the front side, and a large diameter portion 12b having a diameter larger than that of the small diameter portion 12a, and a knob portion 12c extending from the large diameter portion 12b to the front side, and a step between the small diameter portion 12a and the large diameter portion 12b. A tapered portion 12d is provided on the portion,
Pick-up portion 1 from the small diameter portion 12a to the large diameter portion 12b
2e is provided, and the rear ends of the small diameter portion 12a and the large diameter portion 12b have an oval shape.

Such an operating shaft 12 is inserted from the front side of the through hole 5b of the fixing member 5. During this insertion, the small diameter portion 12a is guided by the small diameter hole 8f, as shown in FIG. In a state where the center of 8 and the operation shaft 12 is fixed, the scraping off portion 12e of the large diameter portion 12b is pressed into the large diameter hole 8e while crushing the four convex portions 8h. At this time, before the large diameter portion 12b collapses the convex portion 8h, the small diameter portion 1
Since 2a is designed to be inserted into the small diameter hole 8f,
The small diameter hole 8f is blocked before the convex portion 8h is crushed and the large diameter hole 8f is closed.
Since e is plugged, the dust generated when the protrusion 8h is crushed is retained in the large diameter hole 8e. Further, in the present embodiment, the small diameter portion 12a and the small diameter hole 8f are fitted in close contact with each other, so that the large diameter hole 8e is completely plugged and the dust is surely large in diameter. It stays in the hole 8e. In addition, FIG.
As shown in FIG. 4, when the insertion of the operation shaft 12 is completed, a space 13 is formed between the step portion 8g of the rotating body and the taper portion 12d of the operation shaft 12, and the waste is accumulated in the space 13. Therefore, the residue is more reliably retained in the large diameter hole 8e. The operation of inserting the operation shaft 12 is performed smoothly with the center being fixed.
Can be inserted, and at the end of the insertion, the large-diameter portion 12b can be press-fitted by crushing the convex portion 8h, so that the insertion work can be performed easily without using a highly accurate positioning jig and without any center deviation. It can be performed.

Then, the tip of the small-diameter portion 12a is crimped by the jig, and the operating shaft 12 and the rotating body 8 are securely fixed. Further, both the large diameter hole 8e and the small diameter hole 8f have an oval shape, and the large diameter portion 12b and the small diameter portion 12a are the scraping portion 12
Since they have an oval shape due to e, they are spline-coupled so that the rotating body 8 rotates together with the operating shaft 12. Then, when the rotating body 8 rotates, the protrusion 5e of the fixing member 5 moves in the grooved portion 8c, and when it rotates by a certain angle or more, the protrusion 5e contacts the wall portion of the grooved portion 8c,
It has a stopper. Therefore, the rotating body 8 can rotate within a range of a predetermined rotation angle.

The rotary electric component of the present invention has the above-mentioned structure, and its operation will be described below.
When 2 is rotated, the rotating body 8 is rotated together with the operation shaft 12, the insulating substrate 9 is rotated, and the slider 2 is repeatedly brought into contact with and out of contact with the pattern 10, whereby a pulse signal is output from the terminal portion 3. Is output. At this time, the convex portion 11c of the click spring 11 repeatedly engages and disengages with the concave-convex portion 8d of the rotating body 8,
A click feeling is generated, and a feeling of moderation can be given to the operator.

The rotary electric component of the present invention has the above-described structure and operates, but in this embodiment, the large diameter hole 8e and the large diameter portion 12b are brought into pressure contact with each other by using the convex portion 8d. However, the convex portion 8d is not always necessary, and the large-diameter hole 12
The diameter of b may be narrowed toward the rear.
Further, in the above embodiment, the encoder has been described as an example, but it goes without saying that a rotary electric component such as a variable resistor may be used.

[0035]

The operation shaft of the rotary electric component of the present invention has a small diameter portion formed at the rear end and a large diameter portion located on the front side of the small diameter portion and having a larger diameter than the small diameter portion. , The rotating body is
A small diameter hole formed on the rear end side and a large diameter hole communicating with the small diameter hole and located on the front side and having a larger diameter than the small diameter hole,
The small diameter part is inserted into the small diameter hole via the large diameter hole,
Since the rotating body is attached to the operating shaft by pressing the large diameter portion into contact with the large diameter hole, the large diameter portion can be pressed into contact with the large diameter hole while the center is determined by the small diameter hole. Since the operating shaft can be attached to the rotating body,
The operation shaft assembly work can be performed accurately and easily without using a highly accurate positioning jig.

Further, a convex portion is provided in the large-diameter hole of the rotating body of the rotary electric component of the present invention, and the large-diameter portion of the operating shaft is pressed and fixed to the large-diameter hole in a state where the convex portion is crushed. The large diameter portion can be reliably pressed and fixed to the large diameter hole because the large diameter portion is attached.

Further, since the convex portions of the rotary electric component of the present invention are formed so as to extend in the axial direction of the operation shaft and are formed so as to face each other, the large diameter portion can be more surely enlarged. It can be pressed and fixed to the diameter hole.

Further, since the large-diameter hole of the rotary electric component of the present invention has an oval shape and the convex portions are provided at the four corners of the large-diameter hole, pressure is evenly applied to the large-diameter portion. Since the operation shaft can be pressed and fixed in a state in which the operating shaft is infinitely parallel to the axial direction, the large diameter portion can be fixed to the large diameter hole more reliably.

Further, the convex portion provided in the large diameter hole of the rotary electric component of the present invention is provided in the vicinity of the small diameter hole, and the small diameter portion is inserted into the small diameter hole before the large diameter portion crushes the convex portion. Since the large diameter hole is plugged by the small diameter part before the convex part is crushed, the dust etc. stays in the large diameter hole, so the dust etc. may be scattered in the part. Thus, it is possible to provide a highly reliable rotary electric component. Further, since the large diameter portion may be press-fitted into the large diameter hole at the end of the inserting process, the assembling work becomes easier.

Also, since the small-diameter portion and the small-diameter hole of the rotary electric component of the present invention are fitted in close contact with each other, the large-diameter hole is surely plugged. Etc. remain in the large-diameter holes, there is no fear that dust or the like will be scattered in the parts, and a highly reliable rotary electric part can be provided.

Further, a taper portion is provided in the step portion between the large diameter portion and the small diameter portion of the operation shaft of the rotary electric component of the present invention, and the rotating body is arranged in the axial direction between the small diameter hole and the large diameter hole. Since the large-diameter portion is pressure-contacted and fixed to the large-diameter hole and the space portion is formed between the taper portion and the step portion, the convex portion is formed in the space portion. Dusts and the like generated when crushed are accumulated, and the dregs and the like are reliably retained in the large-diameter hole. Therefore, there is no fear that dusts or the like will be scattered in the component, and it is possible to provide a highly reliable rotary electric component.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a rotary electric component of the present invention.

FIG. 2 is a view of a rotating body of the rotary electric component of the present invention as seen from the front side.

FIG. 3 is a view of a rotating body of the rotary electric component of the present invention seen from the rear side.

FIG. 4 is an enlarged view showing a convex portion of a rotating body according to the rotary electric component of the present invention.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a perspective view of a click spring of the rotary electric component of the present invention.

FIG. 7 is a front view of an operating shaft of the rotary electric component of the present invention.

FIG. 8 is a view of the operating shaft of the rotary electric component of the present invention as seen from the rear side.

FIG. 9 is an explanatory view showing the process of inserting the operation shaft of the rotary electric component of the present invention.

FIG. 10 is a sectional view of a main part of a conventional rotary electric component.

[Explanation of symbols]

1 bottom wall 2 slider 3 terminals 4 Cylindrical part 4a base 4b step 5 fixing members 5a Upper wall part 5b through hole 5c Bearing part 5d Claw receiving part 5e protrusion 6 Mounting plate 6a Receiver 6b Claw 6c Mounting leg 7 storage 8 rotating bodies 8a circular part 8b mounting hole 8c Recessed section 8d uneven part 8e large diameter hole 8f small diameter hole 8g step 8h convex part 8k claw 9 insulating substrate 9a recess 10 patterns 11 click springs 11a base 11b Bent part 11c convex part 11d through hole 11e rectangular hole 12 Operation axis 12a small diameter part 12b Large diameter part 12c Picking part 12d taper part 12e pickpocket 13 Space

Claims (7)

[Claims] 1. An operating shaft rotatably supported by a fixed member, and a rotating body that is attached to the operating shaft and that rotates together with the operating shaft to output an electric signal. The small-diameter portion formed on the end side and the large-diameter portion located on the front side of the small-diameter portion and having a larger diameter than the small-diameter portion, the rotating body has a small-diameter hole formed on the rear end side. , A front side in communication with the small diameter hole, having a large diameter hole having a larger diameter than the small diameter hole, the small diameter portion is inserted into the small diameter hole via the large diameter hole, The rotary electric component, wherein the rotating body is attached to the operation shaft by pressing the large diameter portion into pressure contact with the large diameter hole. 2. A convex portion is provided in the large diameter hole of the rotary body, and the large diameter portion of the operating shaft is attached by being pressed and fixed to the large diameter hole in a state where the convex portion is crushed. The rotary electric component according to claim 1, wherein the rotary electric component is provided. 3. The rotary electric component according to claim 2, wherein the convex portions are formed so as to extend in the axial direction of the operation shaft and are formed to face each other. 4. The rotary electric component according to claim 2, wherein the large-diameter hole has an oval shape, and the convex portions are provided at four corners of the large-diameter hole. . 5. The convex portion provided in the large diameter hole is provided in the vicinity of the small diameter hole, and the small diameter portion is inserted into the small diameter hole before the large diameter portion crushes the convex portion. The rotary electric component according to any one of claims 2 to 4, wherein the rotary electric component is arranged. 6. The rotary electric component according to claim 2, wherein the small-diameter portion and the small-diameter hole are fitted in close contact with each other. 7. A taper portion is provided in a step portion between the large diameter portion and the small diameter portion of the operation shaft, and the rotating body is orthogonal to the axial direction between the small diameter hole and the large diameter hole. 3. A space portion is formed between the taper portion and the step portion in a state in which the large diameter portion is pressed and fixed to the large diameter hole. The rotary electric component according to any one of 1 to 6.