JPH1126212A - Rotary electric part and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resistor high in linearity, by a method wherein an open part formed of the lacking part of the resistor, an outer circumferential edge formed by punching including the outer circumferential end of the resistor, an inner circumferential edge formed by punching including the inner circumferential end, and an island linked to the inner side of the inner circumferential edge and the open part are provided to a board. SOLUTION: An edge 12q which contains the outer circumferential edge of a resistor 12d is punched out of a board 12p to form an outer circumferential edge 12m, a nearly U-shaped opening 12e which contains the inner circumferential end 12s of the resistor 12d is punched out to form an inner circumferential edge 12n, and an island 12t linked to an open part 12u inside the inner circumferential edge 12n is formed. The arc center of the resistor 12d is located at the island 12t, and the arc center is punched out to form an insertion hole 12c for the formation of a board 12. At this point, even if the arc center of the resistor 12d formed by printing comes off the center of the board 12p, the edge 12q, the opening 12e, and the insertion hole 12c are punched out at the same time after the resistor 12d is printed, so that the resistor 12d which is not mistakenly centered can be formed.

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 a rotary variable resistor or a rotary position sensor, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventional rotary electric components used in electronic equipment will be described based on, for example, a variable resistor shown in FIG. First, in the conventional variable resistor, a support shaft 1a is formed so as to protrude from a center portion of a bottom plate of a mold case 1, and a plurality of case engaging portions 1b are formed so as to protrude outward from a circular outer wall.
A flexible substrate 2 on which a resistor 2a and a current collector 2b are formed by printing is integrally mounted on the bottom plate of the mold case 1 by insert molding or the like.
A central hole 2 is provided at the center of the flexible substrate 2.
c is formed, and the support shaft protrudes from the center hole 2c.

Further, a slider receiver 3 made of a resin material or the like is used.
Has a slider receiving portion 3a integrally provided with a slider 4 attached thereto by insert molding or the like, and a column-shaped knob 3b protrudingly formed at the center thereof. A guide hole (not shown) is formed at the center of the knob 3b on the side of the knob 3b to which the slider 4 is attached, and the support shaft 1a of the mold case 1 is fitted into the guide hole. Has become. Then, the slider piece 4 is brought into contact with the surface of the resistor 2a, the support shaft 1a is fitted in the guide hole of the knob 3b, and the slider 3 is mounted on the slider receiver 3 mold case 1, and the Insert the center hole 5a of the cover 5 into the knob 3b of the slider holder 3 and cover the cover 5 from above the mold case 1. Then, when the engaging portion 5b on the hook of the cover 5 is engaged with the engaging portion 1b on the outer wall of the mold case 1, the slider receiver 3 is rotatably stored in the mold case 1 and the conventional rotary A mold electrical component is configured.

[0004]

However, in the conventional rotary electric component as described above, a print bleed as shown in FIG. The outer peripheral end 2d and the inner peripheral end 2e of the body 2a were serrated. In addition, resistor 2
When a is formed by printing, the printed circuit board is positioned and printed and baked by a guide hole (not shown) of the flexible substrate 2, and then the flexible substrate 2 is positioned by the guide hole to punch out the outer shape. Because of this, or due to a dimensional change associated with the firing of the resistor 2a, a printing shift may occur in which the center of the arc-shaped resistor 2a is shifted from the center of the center hole 2b. As shown in FIG. 12, when the resistor 2a has a print bleeding as shown in FIG. There is something. When the resistor 2a is misaligned in printing, the curve differs depending on the direction of the misalignment, but the center of rotation of the slider 4 and the resistor 2a is misaligned. In some cases, the change in the resistance value does not change linearly but becomes a curve, resulting in low linearity. Therefore, the conventional rotary electric parts may not be printed on the resistor,
There has been a problem that it is difficult to improve the linearity of the resistance change characteristic due to printing deviation or the like.

[0005]

According to a first aspect of the present invention, there is provided a rotary electric component according to the present invention, wherein the rotary electric component has an outer peripheral end and an inner peripheral end, and the outer shape has a substantially arc-shaped portion. The printed circuit board includes a substrate on which a resistor is formed by printing, the substrate includes an open portion formed by a missing portion of the resistor, an outer peripheral edge formed by punching including an outer peripheral end of the resistor, An inner peripheral edge formed by punching including the peripheral end, and an island connected to the open portion are formed inside the inner peripheral edge.

[0006] A second aspect for solving the above-mentioned problem is as follows.
As means for (1), the island portion has an arc center of the resistor, and an insertion hole is formed at the arc center.

[0007] Further, a third aspect for solving the above-mentioned problem is as follows.
As a means of (1), the substrate is constituted by a film-like flexible substrate.

[0008] A fourth aspect of the present invention for solving the above-mentioned problems.
The method for manufacturing a rotary electric component of the present invention as a means, a step of forming a resistor having an outer peripheral end, an inner peripheral end, and an open part with a part missing, and an outer shape having a substantially arc shape, A step of forming an outer peripheral edge by punching including an outer peripheral end of the resistor; and forming an inner peripheral edge by punching including an inner peripheral end of the resistor to be connected to the open portion inside the inner peripheral edge. And a step of forming an island portion.

A fifth aspect of the present invention for solving the above-mentioned problems.
As a means of the present invention, the method for manufacturing a rotary electric component according to the present invention has a configuration in which the island has an arc center of the resistor and a step of forming an insertion hole at the arc center.

[0010] A sixth aspect for solving the above-mentioned problems.
In the method for manufacturing a rotary electric component according to the present invention, a step of forming an outer peripheral edge of the resistor, a step of forming the island, and a step of forming an insertion hole in the island are performed simultaneously. The configuration was adopted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary electric component according to an embodiment of the present invention will be described with reference to FIGS. First, the rotary electric component of the present invention will be described by taking a variable resistor as an example. As shown in FIG. 1 which is a plan view and FIG. 2 which is a sectional view of a main part, a metal material such as a flat iron plate is provided at the lowermost portion. Is provided. As shown in FIG. 3, the mounting plate 11 has an outer shape different from that of the mounting plate 11.
Are formed, and three mounting holes 11b are formed on both left and right sides and an upper side in a horizontal direction equidistant from the center hole 11a. A relief hole 11c slightly larger than the mounting hole 11b is formed below the center hole 11a in the figure. Also. A substantially elliptical locking hole 11d is formed at the upper right corner and a circular locking hole 11e is formed at the lower left corner shown in FIG.

On the surface of the mounting plate 11 shown in FIG. 2, a thin and flexible substrate 12 having an insulating film made of polyethylene terephthalate or the like as a base material is provided. As shown in FIG. 4, the substrate 12 has a circular portion 12a having a circular outer shape, and a terminal portion 12b having a substantially rectangular outer shape formed integrally below the circular portion 12a. In addition, an insertion hole 1 is provided at the center of the circular portion 12a.
2c is formed, and the current collector 12 is provided outside the insertion hole 12c.
f, an arc-shaped and substantially horseshoe-shaped resistor 12d is formed outside the current collector 12f by printing or the like. The resistor 12d is formed in contact with the outer peripheral edge 12m of the circular portion 12a of the substrate 12, and the resistor 12d
An opening 12e is formed in contact with the inner peripheral edge 12n of the second member, and an annular current collector 12f is formed by printing on the inner peripheral side of the opening 12e. The arc-shaped resistor 12d
The center of the arc is formed so as to be concentric with the center of the insertion hole 12c, and an open portion 12u composed of a cutout portion is formed below the resistor 12d in the figure. That is, the resistor 12d is formed in contact with the outer peripheral edge 12m of the substrate 12, and is in contact with the inner peripheral edge 12n of the resistor 12d.
2e, the outer peripheral side of the resistor 12d is formed on the same line as the outer peripheral edge 12m of the substrate 12 and the inner peripheral side of the resistor 12d is formed on the same line as the inner peripheral edge 12n of the substrate 12.
In 2d, a comparatively smooth curve without printing bleeding is formed.

The ends of both sides of the open portion 12u, which is below the resistor 12d, are overlapped (broken line near the end of the resistor 12d in FIG. 4) to form the first terminal 1.
2g and the third terminal 12h are formed to extend to the lower terminal portion 12b. The current collector 12f is also formed with a second terminal 12j extending from the lower side in the drawing to the terminal portion 12b. The first terminal 12g, the second terminal 12j, and the third terminal 12h are formed on the surface of the substrate 12 using the same conductive material as the current collector 12f by printing or the like.
A positioning hole 12k is formed in the middle of the second terminal 12j toward the terminal portion 12b.
A second terminal 12j is formed in a ring shape around 2k,
Since the positioning terminal 12d is bypassed, the second terminal 12d is not disconnected from the middle.

As shown in FIG. 2, a substrate holding member 13 made of an insulating resin material or the like is provided on the upper surface side of the substrate 12 placed on the mounting plate 11. Then, the substrate holding member 13 is connected to the outer peripheral edge 1 of the circular portion 12 a of the substrate 12.
The substrate 12 is attached in close contact with the surface of the mounting plate 11 by pressing the surface closer to 2 m from above. As shown in FIGS. 5 and 6, the substrate holding member 13 has a ring-shaped outer shape, a flat side surface, an outer edge 13a having a predetermined width on the outer circumference, and an inner circumference of the outer edge 13a. Flange 13 on the side
b, the surface of the flange 13b is formed lower than the surface of the outer edge 13a, and the inside of the flange 13b is formed by opening a circular opening 13c. Also, the bottom surface 13d of the outer edge portion 13a and the flange portion 13b is formed on the same plane, and as shown in FIG.
The cylindrical first protrusion 13e and the second
A protrusion 13f is formed so as to protrude.
3 for attaching the mounting plate 3 to a predetermined position of the mounting plate 11.
A second projection 13f for locking the substrate 12 to the substrate holding member 13 is formed below the projection 13e in the figure.

Then, the first projection 13e is inserted into the mounting hole 11b of the mounting plate 11, and the second projection 13f is inserted into the clearance hole 11c of the mounting plate 11, so that the substrate holding member 13 holds the substrate 12 while holding it. It is attached to the plate 11. The bottom surface 13 d of the flange 13 b of the substrate holding member 13 is
The substrate 12 is held by the mounting plate 11 by the substrate holding member 13 by pressing the outer peripheral edge 12 m closer to the outer peripheral edge 12 m. The first protrusion 13e and the second protrusion 13f are formed to have a height that does not protrude outward from the back surface of the mounting plate 11.

As shown in FIG. 2, a rotator 14 is disposed on the upper surface of the substrate holding member 13, and the rotator 14 serves as a resistor 12 f of the substrate 12 and a current collector 12.
The g is covered from above to prevent dust and the like from entering the inside. As shown in FIGS. 7 and 8, such a rotating body 14 is formed in a disk shape and is made of a resin material or the like, and a plurality of tooth ridges 14a are formed at equal intervals on the outer periphery thereof. A circular recess 14b is formed at the center of the surface of the rotating body 14, and a center hole 14c is formed through the center of the recess 14b. On the back surface of the rotating body 14, the tooth ridge 14 a is slightly closer to the inner periphery than the root of the tooth ridge 14 a.
An annular projecting portion 14d slightly protruding from the back surface of a is formed, and the section of the projecting portion 14d is formed in a substantially semicircular shape as shown in FIG.

A guide groove 14e having a predetermined width and depth is formed in an annular shape on the inner peripheral side of the ridge portion 14d, and the inner peripheral side of the guide groove 14e is larger than the depth of the guide groove 14e. A shallow flat portion 14f is formed up to the vicinity of the center hole 14c. Also, the boss portion 14 is provided around the center hole 14c.
g is formed, and the boss portion 14g is formed so as to protrude at the same height as the ridge portion 14d. Further, a rectangular slider mounting groove 14h indicated by a broken line is formed slightly deeper than the guide groove 14e at the lower left of the flat portion 14f on the back surface of the rotating body 14 shown in FIG. This slider mounting groove 14h
The protrusion 14j is formed at the center of the flat portion 14d, and as shown in FIG. 8, the protrusion height is lower toward the protruding ridge 14d and higher toward the flat portion 14f.

The slider mounting groove 14 of the rotating body 14
A slider 15 made of metal such as nickel-white or stainless steel having elasticity as shown in FIGS. 1 and 2 is attached to h. The slider 15 has a plurality of contact portions 15a formed at the tip thereof, and the contact portions 15a are bent obliquely downward so as to elastically contact the resistor 12d and the current collector 12f of the substrate 12. . In the slider 15, the mounting hole 15b of the slider 15 is inserted into the projection 14j of the slider mounting groove 14h of the rotating body 14, and the tip of the projection 14j is attached by caulking or the like. It is fixed to the groove 14h.

As shown in FIG. 2, the rotating body 14 is rotatably mounted in the center hole 14 c of the rotating body 14.
A support shaft 16 to be attached to the vehicle is provided. This support shaft 16
Is formed of a flange 16a having a large outer shape and a shaft 16c having a step 16b protruding from the flange 16a.
The flange 16a is inserted into the concave portion 14b of the rotating body 14, and the shaft 16c is inserted into the center hole 14c of the rotating body 14.
The tip of the shaft portion 16c is inserted into the insertion hole 12 of the substrate 12.
c, the rotating body 14 is inserted into the center hole 11a of the mounting plate 11 and protrudes outside the mounting plate 1, and the tip of the support shaft 16 protruding from the mounting plate 11 is pulled out of the mounting plate 11 by caulking or the like. It is stopped and rotatably mounted.
The tip of the shaft 16c and the insertion hole 12c
Are formed with substantially the same diameter, the position of the substrate 12 is determined at the center by the shaft portion 16c, and the position of the slider 15 with respect to the resistor 12d is determined.

As shown in FIG. 9, the method of manufacturing the substrate 12 of the rotary electric component of the present invention having the above-described structure first includes the steps of: forming a flexible base material 12p such as an insulating film;
The base material 12 is positioned by a pilot hole (not shown).
An annular current collector 12f made of a conductive material and first, second, and third terminals 12g, 12h, and 12j are formed on the surface of p by printing. Next, on the outside of the current collector 12f, an arc-shaped resistor 12d having an outer peripheral end 12r and an inner peripheral end 12n indicated by a two-dot chain line is formed by printing. At this time, the resistor 12d
Outside the outer peripheral end 12r, the resistor 12d is not printed, an edge 12q where the surface of the base material 12p is exposed is formed, and a substantially arc-shaped resistor 12d having a cutout portion is formed. An open portion 12u composed of the missing portion is formed in a part on the lower side in the figure. Also, the outer peripheral end 1 of the resistor 12d
Printing blur occurs at 2r and the inner peripheral end 12n as described in the above-described conventional technique.

Next, an edge 12q of the portion indicated by hatching in FIG. 9 including the outer edge 12r of the resistor 12d is punched to form an outer edge 12m indicated by a solid line.
A substantially horseshoe-shaped opening 12e including an inner peripheral end 12s of 2d is punched to form an inner peripheral edge 12n indicated by a solid line, and an island 12 connected to the opening 12u is formed inside the inner peripheral edge 12n.
t is formed. The island 12t has the arc center of the resistor 12d, and the center of the arc is punched out to form an insertion hole 12c, thereby forming the substrate 12 having a shape as shown in FIG. At this time, the printed resistor 12d is formed.
Even if the center of the circular arc is deviated from the center of the base material 12p, the edge 12
Since q, the opening 12e, and the insertion hole 12c are punched out at the same time, it is possible to form the resistor 12d in which the center of the arc of the resistor 12d is not shifted from the center of the insertion hole 12c. Further, since the resistor 12d is punched out including the outer peripheral end 12r and the inner peripheral end 12s indicated by the two-dot chain line, the outer peripheral edge 12m and the inner peripheral edge 12n of the punched resistor 12d are: A relatively smooth curve without print bleeding is formed. Also, the second terminal 12j
The positioning holes 12k formed in the middle of the drawing are punched at the same time as punching the hatched portion or in a separate step.

Next, the substrate 12 manufactured by the method described above is used.
In assembling the rotary electric component using the method, the mounting plate 11 is positioned and placed on an assembling jig (not shown). Next, the substrate holding member 13 is manually turned upside down from the state shown in FIG. 5, the substrate 12 is placed on the inverted bottom surface 13d, and the second projection 13f of the substrate holding member 13 is inserted into the positioning hole 12k. Align. Then, the resistor 12d and the current collector 12f are located in the opening 13c of the substrate holding member 13, the circular portion 12a is located inside the three first protrusions 13e, and the substrate 12 is temporarily fixed to the substrate holding member 13. Locked.

Next, the three first projections 13e of the substrate holding member 13 on which the substrate 12 is temporarily fixed are pressed into the mounting holes 11b of the mounting plate 11, and the positioning holes 12
When the second projection 13f protruding from k is inserted into the clearance hole 11c of the mounting plate 11, the substrate 12 is held by the flange 13b of the substrate holding member 13 and temporarily fixed to the mounting plate 11. At this time, the tips of the first protrusion 13e and the second protrusion 13f do not protrude outward from the back surface of the mounting plate 11.
Next, the tip of the second projection 13f is caulked to hold the substrate 12. At this time, the substrate 12 is caulked so as to be rotatable around the second protrusion 13f, and the mounting plate 11
The swaged portion does not protrude from c. That is, in this state, the board holding member 13 is held without looseness to the mounting plate 11, and the board 12 is
, And can move in the rotational direction until it comes into contact with the opening 13c. Next, from the upper surfaces of the substrate 12 and the substrate holding member 13 temporarily fixed to the mounting plate 11,
Is mounted on the rotating body 14 to which is attached. Then, the rotating body 1
The outer edge 13a of the substrate holding member 13 in the guide groove 14e
, The plurality of contact portions 15a of the slider 15 are located in the openings 13c of the substrate holding member 13, and the contact portions 15a elastically contact the respective surfaces of the resistor 12d and the current collector 12f. Next, the support shaft 16 is inserted into the center hole 14c of the rotating body 14 described above.
When the shaft 16b is inserted, the shaft 16b is inserted into the insertion hole 12c of the substrate 12, and the step 16c of the support shaft 16 presses the periphery of the insertion hole 12c, so that the tip of the shaft 16b is attached to the mounting plate 11. Project outward from the back surface of the. That is, as described above, the substrate 12 is slightly movable in the rotational direction about the second protrusion 13f, and the support shaft 16 is inserted into the insertion hole 12c to determine the center of the substrate 12, and the substrate holding member 13 Bottom 1
The outer peripheral edge 12m is sandwiched by 3d, and is closely attached to the surface of the mounting plate 11. Since the positioning holes 12k and the insertion holes 12c are formed by punching in the same process, the dimensional accuracy of the distance between the positioning holes 12k and the insertion holes 12c is high.
If 2k is rotated, the insertion hole 12c is always the center hole 11a.
When the support shaft 16 is inserted into the insertion hole 12c of the board 12 as described above, the position of the board 12 is determined. Next, when the tip of the shaft portion 16c protruding outward from the back surface of the mounting plate 11 is caulked with a caulking jig (not shown), the rotating body 14 is rotatably fixed to the mounting plate 11 by a shaft.

The outer edge 13 of the substrate holding member 13
a small gap is formed between the surface of the guide groove 14a and the bottom surface of the guide groove 14e of the rotating body 14.
e, the bottom surface of the substrate holding member 13 is minute whether it is in contact with the surface of the outer edge portion 13a of the substrate holding member 13 or not.
3 can be prevented from floating from the mounting plate 11.
In addition, since the step 16c is formed on the support shaft 16,
Since the bottom surface of the guide groove 14e does not strongly press the surface of the outer edge 13a of the substrate holding member 13, even if the bottom surface of the guide groove 14e slightly rubs the surface of the outer edge 13a, the rotational torque of the rotating body 14 is small. Is not heavy. Further, the tip of the first protrusion 13e of the substrate holding member 13 inserted into the mounting hole 11b of the mounting plate 11 is attached to the mounting hole 11b.
By crimping the inside of b with a small press or the like and fitting it into the mounting hole 11b, the substrate holding member 13 can be more securely mounted on the mounting plate 11.

That is, according to the method for manufacturing a rotary electric component of the present invention, the substrate 12 has an outer peripheral end 12r, an inner peripheral end 12s, and an open part 12 with a part missing, and a substantially arc-shaped external resistor. 1
Forming 2d, and the outer peripheral end 12r of the resistor 12d.
Forming an outer peripheral edge by punching including an inner peripheral edge of the resistor 12d and forming an inner peripheral edge 12n inside the inner peripheral edge 12n; and forming an island portion 12t connected to the open portion 12u inside the inner peripheral edge 12n. Forming step. Forming an insertion hole 12c at the center of the arc of the resistor 12d in the island 12t; forming an outer peripheral edge 12m of the resistor 12d; Forming an insertion hole 1 in the island portion 12t.
The method of performing the step of forming 2c simultaneously may be used.

Further, the rotary electric component of the present invention is attached to an electronic device (not shown), and engages a tooth 14a of the rotating body 14 with a driving source of the electronic device to rotate the driving source. When the rotary electric component has a desired resistance value, the rotation of the drive source on the electronic device side can be stopped.

[0027]

The rotary electric component according to the present invention includes a substrate on which a substantially arc-shaped resistor having an outer peripheral end and an inner peripheral end and having an outer shape with a cutout portion is formed by printing. An open portion formed by a missing portion of the resistor, an outer edge formed by punching including an outer edge of the resistor, an inner edge formed by punching including an inner edge of the resistor, and the inner edge Since the island portion connected to the open portion is formed inside the opening, the outer peripheral edge and the inner peripheral edge formed by the punching can form a clean curve without printing blur on the resistor, As shown in curve A of FIG. 11, it is possible to form a resistor with high linearity, in which the change characteristic of the resistance value changes linearly with the rotation angle. Therefore, a high-precision rotary electric component can be provided.

Further, since the island has the arc center of the resistor and the insertion hole is formed at the center of the arc, the resistor can be formed without any center deviation with respect to the center of the insertion hole. . Therefore, if the insertion hole is used as the center of rotation of the member to which the slider is attached, the displacement of the trajectory of the slider with respect to the resistor can be suppressed. Can improve the linearity of the rotary electric component, and can provide a high-performance rotary electric component.

Further, since the substrate of the rotary electric component of the present invention is formed of a film-like flexible substrate, the substrate can be made thinner, and the electric component of the present invention can be made thinner. It can be easily formed.

Further, in the method of manufacturing a rotary electric component according to the present invention, a step of forming a resistor having an outer peripheral end, an inner peripheral end, and an open part with a part cut off on a substrate and having a substantially arc-shaped outer shape. Forming an outer peripheral edge by punching including the outer peripheral end of the resistor; forming an inner peripheral edge by punching including the inner peripheral end of the resistor; being connected to the open portion inside the inner peripheral edge; And the step of forming an island portion, by the manufacturing method of the present invention,
Even if the resistor has print bleeding or the like, it can be prevented from being punched out with a press or the like. Therefore, the linearity of the resistance change characteristic of the rotary electric component of the present invention can be increased, and a high-performance rotary electric component can be provided.

In the method of manufacturing a rotary electric component according to the present invention, since the island has an arc center of the resistor and a step of forming an insertion hole at the arc center, the insertion hole is formed in the island. Is formed, it is possible to form an insertion hole having no center deviation with respect to the arc center of the resistor. Therefore, the linearity of the resistance change characteristic of the rotary electric component of the present invention can be improved, and a high-performance rotary electric component can be provided.

Further, the step of forming the outer peripheral edge of the resistor, the step of forming the island portion, and the step of forming an insertion hole in the island portion are simultaneously performed, so that the center of the insertion hole is In addition, it is possible to form a resistor in which the center of the arc has no center deviation. Therefore, the linearity of the resistance change characteristic of the rotary electric component of the present invention can be further improved, and a high-performance rotary electric component can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a rotary electric component according to the present invention.

FIG. 2 is a cross-sectional side view of the rotary electric component of the present invention.

FIG. 3 is a plan view of a mounting plate for the rotary electric component of the present invention.

FIG. 4 is a plan view of a substrate of the rotary electric component of the present invention.

FIG. 5 is a plan view of a substrate holding member of the rotary electric component of the present invention.

FIG. 6 is a side view of the substrate holding member of the rotary electric component according to the present invention.

FIG. 7 is a plan view of a rotating body of the rotary electric component of the present invention.

FIG. 8 is a sectional side view of a rotating body of the rotary electric component of the present invention.

FIG. 9 is a schematic plan view illustrating a method for manufacturing a resistor of a rotary electric component according to the present invention.

FIG. 10 is an exploded perspective view of a conventional rotary electric component.

FIG. 11 is a schematic diagram illustrating printing wetness of a resistor of a conventional rotary electric component.

FIG. 12 is a graph illustrating resistance change characteristics of a conventional rotary electric component.

[Explanation of symbols]

 Reference Signs List 11 mounting plate 11b mounting hole 11c relief hole 12 substrate 12d resistor 12e opening 12f current collector 12k positioning hole 12m outer peripheral edge 12n inner peripheral edge 12p base material 12q edge 12r outer peripheral edge 12s inner peripheral edge 13 substrate holding member 13a outer peripheral portion 13b Flange portion 13c Opening 13d Bottom surface 13e First protrusion 13f Second protrusion 14 Rotating body 14a Tooth ridge 14b Recess 14c Center hole 14d Projection 14e Guide groove 14f Flat portion 14g Boss 14h Slider mounting groove 14j Projection 15 Sliding Child 15a Contact part 15b Mounting hole 16 Support shaft 16a Flange part 16d Shaft part 16c Step part

Claims (6)

[Claims] A substrate having a substantially arc-shaped resistor having an outer peripheral end and an inner peripheral end and having a cutout portion formed on a printed board;
The substrate has an open portion formed by a missing portion of the resistor, and an outer peripheral edge formed by punching including an outer peripheral end of the resistor.
A rotary electric component, comprising: an inner peripheral edge formed by punching including an inner peripheral end of the resistor; and an island connected to the open portion inside the inner peripheral edge. 2. The rotary electric component according to claim 1, wherein said island portion has an arc center of said resistor, and an insertion hole is formed in said arc center. 3. The rotary electric component according to claim 1, wherein the substrate is formed of a film-like flexible substrate. 4. A step of forming a resistor having an outer peripheral end, an inner peripheral end, and an open part with a part cut off on a substrate and having a substantially arc-shaped outer shape, and punching out the resistor including the outer peripheral end. Forming an outer peripheral edge, and punching out the inner peripheral edge of the resistor to form an inner peripheral edge, and forming an island connected to the open portion inside the inner peripheral edge. A method for producing a rotary electric component. 5. The method for manufacturing a rotary electric component according to claim 4, wherein the island has an arc center of the resistor and an insertion hole is formed at the arc center. 6. forming an outer peripheral edge of the resistor;
The method for manufacturing a rotary electric component according to claim 5, wherein the step of forming the island portion and the step of forming an insertion hole in the island portion are performed simultaneously.