JPH11224808A - Rotary-type electric part and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a rotary-type electric part to be lessened in number of parts and improved in assembly properties, by a method wherein an external thread is provided to the external circumference of a cylinder, and a control shaft is inserted into the cylinder. SOLUTION: A mounting part 1 is composed of four pieces; a cylinder 1c formed by drawing a flat plate 1a of metal, the flat plate 1a, a cover 1e formed by drawing or bending a metal plate linked to the flat plate 1a, and a mounting leg 1f. A control member 2 is composed of a columnar control shaft 2a and a rotator 2b formed integrally with the control shaft 2a and linked to the one end of the control shaft 2a, wherein the control shaft 2a is inserted into the cylinder 1c and releasably supported by the small diameter part 1d in a rotatable manner. Rectangular through-holes are provided extending over both the flat plate 1a and the cover 1e, where the through-holes are provided separately from the outer flat part in the place facing each other.

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 variable resistor and a rotary switch, and a method for manufacturing the rotary electric component.

[0002]

2. Description of the Related Art As shown in FIGS. 41 and 42, a conventional rotary electric component, for example, a variable resistor, has a mounting portion 21 having a front plate 21a and a cylindrical portion 2 having a male screw portion 21b on the outer periphery.
1c, and the mounting portion 21 is manufactured by zinc die casting. Further, the cylindrical cover portion 22 manufactured by drawing or bending a metal plate has an enclosing portion 22a, a mounting leg 22b having a V-shaped portion protruding from one end of the enclosing portion 22a, and an enclosing portion. And a projection 22c protruding from the other end of the portion 22a. And
The cover portion 22 is attached to the attachment portion 21 by bending the protruding piece 22c in a state where the front side plate 21a is in contact with the other end.

An operating member 23 made of a synthetic resin molded product is composed of a columnar operating shaft 23a and a rotating body 23b integrally formed at one end of the operating shaft 23a.
The operation shaft 23a is rotatably supported by the cylindrical portion 21c by inserting the 3a into the cylindrical portion 21c. The slider 24 made of a metal plate is attached to the rotating body 23b. On one surface of the insulating substrate 25, a resistor 26 and a conductor 27 are provided in an arc shape.
It is fixed to one end of the cover part 22 by appropriate means. When the insulating substrate 25 is attached to the cover 22, the slider 24 contacts the resistor 26 and the conductor 27, and the slider 24, the resistor 26, and the conductor 27 Is to be covered.

When the operation shaft 23a is rotated, the slider 24 slides on the resistor 26 and the conductor 27 to change the resistance value. Further, such a rotary electric component is attached to the chassis or the like by inserting the cylindrical portion 21c of the attaching portion 21 into a hole of the chassis or the like on the set side and screwing a nut into the male screw portion 21b. Leg 22b
Are mounted on the printed circuit board 28 by soldering the mounting legs 22b to the conductive pattern in a state of being snapped to the printed circuit board 28.

[0005]

In the conventional rotary electric component, the mounting portion 21 including the front side plate 21a and the cylindrical portion 21c having the male screw portion 21b is formed by zinc die casting, so that the cost is high. There is a problem of becoming. Also, the cover part 22 separate from the mounting part 21 or the mounting leg 2
Since the cover portion 22 with the 2b is provided, not only the number of parts is increased and the cost is increased, but also the assembly is troublesome and the productivity is poor. Further, since the rotation of the operation shaft 23a is supported on the entire inner surface of the cylindrical portion 21c, the friction between the operation shaft 23a and the cylindrical portion 21c is large, and the rotation of the operation shaft 23a cannot be performed smoothly. There is a problem. Also, zinc die cast has low strength,
Since it is necessary to increase the thickness to obtain strength, there is also a problem that the product is large and heavy.

[0006]

As a first means for solving the above-mentioned problems, as a first solution, there is provided a mounting having a flat plate portion forming a front side plate and the like and a tubular portion formed by drawing from the flat plate portion. A male screw portion is formed on the outer periphery of the cylindrical portion, and an operation shaft is inserted into the cylindrical portion. As a second solution, a pair of or two pairs of outer flat portions are provided on the outer periphery of the cylindrical portion at positions facing each other, and the cylindrical portion located between the adjacent outer flat portions is provided. As a third solving means, an inner flat portion is formed on the inner periphery of the cylindrical portion so as to face the outer flat portion provided on the outer periphery of the cylindrical portion. Was formed. Further, the cover is provided integrally with the fourth flat plate.

As a fifth solution, a through hole is provided in the flat plate portion at a position facing the outer flat portion provided on the outer periphery of the cylindrical portion at an interval. As a sixth solution, the through-hole is provided across the flat plate portion and the cover portion, and at a position of the through-hole,
The cover portion was formed by bending the cover portion from the flat plate portion. Further, as a seventh solution, a mounting leg is provided integrally with the flat plate portion or the cover portion.
As an eighth solution, a small-diameter portion is provided at an inner end of the cylindrical portion, and the operation shaft is supported by the small-diameter portion.

[0008] As a ninth solution means, there is provided a step of forming a cylindrical portion by drawing a flat plate portion made of a flat metal plate, and dividing the flat portion into a plurality having a male screw forming groove on the outer periphery of the cylindrical portion. Disposing the jig, press-fitting a punch into the inside of the tubular portion, biting the tubular portion into the male screw forming groove to form a male screw portion on the outer periphery of the tubular portion, And a step of inserting an operation shaft into the cylindrical portion. Further, as a tenth solution, in the manufacturing method, in the step of forming the cylindrical portion, the cylindrical portion is formed in a polygonal shape. According to an eleventh solution, the jig divided into a plurality of jigs includes at least one pair of flat surfaces provided at positions facing each other and the male screw provided at a position between the adjacent flat surfaces. A forming groove, wherein the outer flat portion and the external thread portion are formed on the outer periphery of the cylindrical portion by press-fitting the punch into the cylindrical portion. As a twelfth solution, the jig divided into a plurality is divided at a position of the flat surface.

According to a thirteenth solution, the jig is divided into a plurality of portions on the outer periphery of the cylindrical portion with a gap provided between the flat surface of the jig and the outer periphery of the cylindrical portion. After the jig is arranged, the manufacturing method is such that the punch is pressed into the inside of the cylindrical portion. As a fourteenth solution,
The punch has at least a pair of flat surfaces at positions facing each other, and the punch is placed inside the cylindrical portion in a state where the flat surface of the punch faces the flat surface of the jig. And a flat inner surface is formed on the inner periphery of the tubular portion so as to face the outer flat portion on the outer periphery of the tubular portion. As a fifteenth solution, a manufacturing method includes a step of forming a cover by bending or drawing the flat plate. Also, the first
As a means for solving the sixth problem, the manufacturing method includes a step of forming a mounting leg from the cover portion or the flat plate portion. As a seventeenth solution, the punch has a large-diameter portion and a small-diameter portion provided at an end of the large-diameter portion, and press-fits the large-diameter portion and the small-diameter portion into the inside of the cylindrical portion. Thus, the manufacturing method includes a step of forming a support portion for supporting the operation shaft corresponding to the small-diameter portion in the cylindrical portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment relating to a rotary electric component and a method for manufacturing the rotary electric component of the present invention is shown in FIGS.
Referring to FIG. 9, FIG. 1 is a side view showing a first embodiment of the rotary electric component of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIGS. FIG. 4 is an explanatory diagram for describing a first embodiment of the method for manufacturing a rotary electric component of FIG.

As shown in FIGS. 1 and 2, the rotary electric component of the present invention, for example, a variable resistor,
A flat plate portion 1a constituting the front side plate and the like, and a male screw portion 1b on the outer periphery.
, A small-diameter portion 1d provided at an inner end of the cylindrical portion 1c, and a cover portion 1e connected to the flat plate portion 1a.
And a plurality of mounting legs 1f projecting from one end of the cover 1e and having a V-shaped portion at the end. The mounting portion 1 has a cylindrical portion 1c formed by drawing a flat plate portion 1a made of a single metal plate, and a cover portion 1e.
Is formed by drawing or bending a metal plate connected to the flat plate portion 1a, and the cylindrical portion 1c, the flat plate portion 1a, the cover portion 1e, and the mounting leg 1f are formed by one component. Has become. In addition, although the mounting leg 1f has been described as projecting from the cover 1e, the cover 1
e may be eliminated and it may be made to protrude from the flat plate portion 1a.

The operating member 2 made of a synthetic resin molded product is composed of a columnar operating shaft 2a and a rotating body 2b integrally formed at one end of the operating shaft 2a. The operation shaft 2a is rotatably supported by the small diameter portion 1d of the cylindrical portion 1c so as to pass through the inside of the cylindrical portion 1c. The slider 3 made of a metal plate is attached to the rotating body 2b.
On one surface of the insulating substrate 4, a resistor 5 and a conductor 6 are provided in an arc shape, and the insulating substrate 4 is fixed to one end of the cover 1e by an appropriate means. When the insulating substrate 4 is attached to the cover 1e, the slider 3 comes into contact with the resistor 5 and the conductor 6, and the slider 3, the resistor 5, and the conductor 6 Is to be covered.

When the operating shaft 2a is rotated, the slider 3 slides on the resistor 5 and the conductor 6 to change the resistance value. Further, such a rotary electric component is attached to the chassis or the like by inserting the cylindrical portion 1c of the attaching portion 1 into a hole of the chassis or the like on the set side and screwing a nut into the male screw portion 1b. The leg 1f is a printed circuit board 7
The mounting feet 1f are soldered to the conductive patterns and are attached to the printed circuit board 7 in a state where they are snapped.

Next, a first embodiment of the method for manufacturing a rotary electric component as described above will be described with reference to FIGS.
First, as shown in FIG. 3, a flat metal plate K of a hoop material is used.
Is drawn out by an automatic machine, and as shown in FIG. 4, the metal plate K is drawn with the upper die 10 and the lower die 11 to form the cylindrical portion 1c. Next, the metal plate K is sent out to the next step, and as shown in FIG. 5, holes 14 are formed in the bottom plate portion 14 of the cylindrical portion 1c by punching with the pins 12 and the lower mold 13.
a is formed. Thereafter, as shown in FIG. 6, the jig 15 divided into a plurality of parts having the male screw forming groove 15a is arranged so as to surround the outer periphery of the cylindrical part 1c, and the male screw forming groove 15a is formed into the cylindrical part 1c. A jig 16 having a hole 16a is arranged at a lower portion of the bottom plate portion 14, and a large-diameter portion 17a and a small-diameter portion 17b are provided at an upper portion thereof.
A punch 17 having a tapered portion 17d is arranged at the boundary.

Next, as shown in FIG. 7, when the punch 17 is press-fitted into the cylindrical portion 1c before the small-diameter portion 17b of the punch 17, the outer diameter of the large-diameter portion 17a becomes larger than that of the cylindrical portion 1c. Since it is formed larger than the inner diameter, the large-diameter portion 17a gradually extrudes the cylindrical portion 1c outward with the tapered portion 17d,
c is cut into the male screw forming groove 15a to form the male screw portion 1b, and the small diameter portion 17b is pressed into the hole 14a of the bottom plate portion 14 and the bottom plate portion 14 is pushed outward by the small diameter portion 17b to form the bottom plate portion 14. Is pressed against the hole 16a of the jig 16 to form a small diameter portion 1d for supporting the operation shaft 2a. Next, as shown in FIG. 8, the metal plate K is punched by a line indicated by a dotted line T1 to form the outer shape of the cover 1e and the mounting leg 1f, and then bent by a line indicated by a two-dot chain line T2. When the V-shaped portion is formed by bending the end portion of the mounting leg 1f while forming the cover portion 1e, the cover portion 1e as shown in FIG. 9 and the mounting portion 1 with the mounting leg 1f are manufactured. Is done.

Then, although not shown here, after inserting the operating shaft 2a of the operating member 2 to which the slider 3 is attached into the inside of the cylindrical portion 1c, the resistor 5 and the conductor 6 are connected. When the provided insulating substrate 4 is fixed to the cover 1e, the manufacture of the rotary electric component of the present invention is completed.

FIGS. 10 and 11 show a second embodiment of a rotary electric component according to the present invention. The mounting plate 1 in this embodiment has a cylindrical portion 1c as shown in FIGS. Has two pairs of outer flat portions 1g provided at positions facing each other on the outer circumference, a male screw portion 1b formed on the outer circumference positioned between adjacent outer flat portions 1g, and an outer flat portion provided on the outer circumference. Inner flat portion 1 provided on the inner periphery facing portion 1g
h. Further, a plurality of rectangular through holes 1j are provided so as to straddle the flat plate portion 1a and the cover portion 1e, and the through holes 1j are formed at positions facing the outer flat portion 1g at an interval, and The cover portion 1e is formed by bending the cover portion 1e from the flat plate portion 1a at the position of the through hole 1j, that is, the position indicated by the two-dot chain line shown in FIG. 1 is formed. Other configurations are the same as those of the first embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

When the outer flat portion 1g is provided on the outer periphery of the cylindrical portion 1c as described above, the outer flat portion 1g not only determines the position of the outer flat portion 1g on the chassis on the set side, but also forms the cylindrical portion 1c.
As compared with the case where c is a cylinder, the size becomes smaller at the outer flat portion 1g, and a compact rotary electric component is obtained. Further, by providing the outer flat portion 1g or the outer flat portion 1g and the inner flat portion 1h, the tubular portion 1c can be made thicker than a cylindrical portion, and the strength of the tubular portion 1c can be reduced. high,
Moreover, the one in which the formation of the external thread portion 1b is reliable can be obtained.
Further, by providing the through-hole 1j at a position facing the outer flat portion 1g of the cylindrical portion 1c at an interval, the cylindrical portion 1c is deformed by the tension generated in the flat plate portion 1a when the cover portion 1e is formed by bending. By providing the through hole 1j over the flat plate portion 1a and the cover portion 1e, the deformation of the cylindrical portion 1c can be further prevented.

A method of manufacturing a mounting portion in such a rotary electric component will be described with reference to FIGS. 12 to 17. FIG. 12 to FIG. 17 show a second embodiment of the method of manufacturing a rotary electric component according to the present invention. An example is shown, and a flat metal plate K of a hoop material is sent out by an automatic machine in the same manner as in the first embodiment of the manufacturing method described above, and as shown in FIG. Drawing a metal plate K to form a cylindrical tubular part 1
Form c. Next, the metal plate K is sent to the next step, and as shown in FIG. 13, holes 14a are formed in the bottom plate portion 14 of the cylindrical portion 1c by punching with the pins 12 and the lower mold 13.
To form Thereafter, as shown in FIGS. 14 and 15,
The jig 15 has a flat surface 15b and a male screw forming groove 15a formed between the flat surfaces 15b, is divided by the flat surface 15b, and is divided into four pieces joined by the flat surface 15b.
Is moved in the direction of the arrow in FIG. 15 so as to surround the outer periphery of the cylindrical portion 1c. At this time, the four jigs 15
Two pairs of flat surfaces 15b are combined in a cross shape by the flat surfaces 15b.
Is formed, and a gap is provided between the flat surface 15b and the outer periphery of the cylindrical portion 1c.

A jig 16 having a hole 16a is arranged below the bottom plate portion 14 of the cylindrical portion 1c.
A punch 17 having a large-diameter portion 17a and a small-diameter portion 17b is provided above c, and a punch 17 having a tapered portion 17d is disposed at the boundary. Further, as shown in FIG.
The large-diameter portion 17a is provided with two pairs of flat surfaces 17c provided at positions facing each other. Next, as shown in FIG. 17, the small-diameter portion 17b of the punch 17 comes first, and the flat surface 17c faces the flat surface 15b of the jig 15,
When the punch 17 is pressed into the inside of the cylindrical portion 1c, the large-diameter portion 1
Since the outer diameter of 7a is formed larger than the inner diameter of the cylindrical portion 1c, the large diameter portion 17a gradually pushes the cylindrical portion 1c outward with the tapered portion 17d, and the cylindrical portion 1c with the flat surface 17c. Is pressed against the flat surface 15b to form the outer flat portion 1g and the inner flat portion 1h, and the cylindrical portion 1c is connected to the male screw forming groove 15b.
a to form a male screw portion 1b, the small diameter portion 17b is pressed into the hole 14a of the bottom plate portion 14, and the bottom plate portion 14 is pushed outward by the small diameter portion 17b. 16 is pressed against the hole 16a of the
The small-diameter portion 1d for supporting a is formed.

The subsequent manufacturing method is the same as that of the above-described first embodiment of the manufacturing method, and the description thereof is omitted. In addition, when miniaturization, thinning, or cost reduction of the rotary electric component is required, the metal plate of the mounting portion 1
When such a thin plate material is used, the cylindrical portion 1 formed in the process shown in FIG.
c becomes thin, and the strength of the cylindrical portion 1c and the difficulty of forming the male screw portion 1b occur. In such a case, after the cylindrical portion 1c is formed in the step of FIG. 12, the cylindrical portion 1c may be compressed in the axial direction to increase its thickness.

FIGS. 18 to 24 show a third embodiment of the method of manufacturing a rotary electric component according to the present invention. As in the second embodiment of the above-described manufacturing method, a flat metal plate of a hoop material is used. K
Is drawn out by an automatic machine, and as shown in FIG. 18, the metal plate K is drawn by the upper die 10 and the lower die 11 to form the cylindrical portion 1c. The tubular portion 1c formed at this time has a rectangular tubular portion as shown in FIG. Note that the cylindrical portion 1c may be a polygon such as a hexagon. Next, the metal plate K is sent to the next step, and as shown in FIG. 20, a hole 14a is formed in the bottom plate portion 14 of the cylindrical portion 1c by punching with the pins 12 and the lower mold 13. Thereafter, similarly to the manufacturing method of the second embodiment,
As shown in FIGS. 21 and 22, a flat surface 15b and a male screw forming groove 15a formed between the flat surfaces 15b are divided by the flat surface 15b, and divided into four pieces to be joined by the flat surface 15b. The jig 15 thus set is moved in the direction of the arrow in FIG. 22 and arranged so as to surround the outer periphery of the cylindrical portion 1c.
At this time, the four jigs 15 are joined by the flat surface 15b to form two pairs of flat surfaces 15b in a cross shape, and a gap is formed between the flat surface 15b and the outer periphery of the cylindrical portion 1c. In addition, the corners of the rectangular cylindrical portion 1c are cut into the male screw forming groove 15a.

A jig 16 having a hole 16a is arranged below the bottom plate portion 14 of the cylindrical portion 1c.
A punch 17 having a large-diameter portion 17a and a small-diameter portion 17b is provided above c, and a punch 17 having a tapered portion 17d is disposed at the boundary. This punch 17 is, as shown in FIG.
The large-diameter portion 17a is provided with two pairs of flat surfaces 17c provided at positions facing each other. Next, as shown in FIG. 24, the small-diameter portion 17b of the punch 17 comes first, and the flat surface 17c faces the flat surface 15b of the jig 15,
When the punch 17 is pressed into the inside of the cylindrical portion 1c, the large-diameter portion 1
Since the outer diameter of 7a is formed larger than the inner diameter of the cylindrical portion 1c, the large diameter portion 17a gradually pushes the cylindrical portion 1c outward with the tapered portion 17d, and the cylindrical portion 1c with the flat surface 17c. Is pressed against the flat surface 15b to form the outer flat portion 1g and the inner flat portion 1h, and the cylindrical portion 1c is connected to the male screw forming groove 15b.
a to form a male screw portion 1b, the small diameter portion 17b is pressed into the hole 14a of the bottom plate portion 14, and the bottom plate portion 14 is pushed outward by the small diameter portion 17b. 16 is pressed against the hole 16a of the
The small-diameter portion 1d for supporting a is formed. And
The subsequent manufacturing method is the same as that of the first embodiment of the manufacturing method described above, and the description is omitted.

The jig 15 is provided with a flat surface 15b for forming the outer flat portion 1g, or
Has a flat surface 17c for forming the inner flat portion 1h.
Is provided, the cylindrical portion 1c can be made thicker than the cylindrical portion, the strength of the cylindrical portion 1c is high, and the formation of the male screw portion 1b is more reliable. Further, in the step of forming the cylindrical portion 1c, the cylindrical portion 1c can be made into a polygonal shape such as a square, so that the cylindrical portion 1c can be made thick, the strength of the cylindrical portion 1c is high, and the male screw portion is formed. The formation of 1b is ensured, and it is suitable for those using a thin plate material. The jig 15 divided into a plurality of pieces
b has a male screw forming groove 15a formed therebetween, and is divided by a flat surface 15b so as to be fitted by the flat surface 15b. 1b can be formed. Also, the flat surface 15
Since a plurality of jigs 15 can be fitted with a gap between b and the outer periphery of the cylindrical portion 1c, the flesh of the cylindrical portion 1c is removed by the jigs 15 at the time of alignment. Even when the mating surface is not worn and the repetition of the mating causes abrasion of the mating surface, and even if a small gap is formed in the mating surface and a burr occurs in the outer flat portion 1g, the outer flat portion 1g is a male screw portion. Since it is lower than 1b, there is no problem in screwing the nut, and the jig 15 can be used for a long time.

FIGS. 25 and 26 show a rotary electric component according to a third embodiment of the present invention. In this embodiment, a cylindrical surface 1k is used instead of the inner flat portion 1h of the second embodiment. Next, a third embodiment will be described. As shown in FIGS. 25 and 26, the mounting plate 1 in this embodiment is provided on the cylindrical portion 1c at a position facing the outer periphery thereof. It has two pairs of outer flat portions 1g, a male screw portion 1b formed on the outer periphery located between adjacent outer flat portions 1g, and a cylindrical surface 1k provided on the inner circumference of the cylindrical portion 1c. doing.
Since other configurations are the same as those of the second embodiment shown in FIGS. 10 and 11, the same components are denoted by the same reference numerals and description thereof is omitted here.

When the outer flat portion 1g is provided on the outer periphery of the cylindrical portion 1c as described above, similar to the second embodiment,
Not only is this outer flat portion 1g positioned to the chassis on the set side, but also the cylindrical portion 1c is compared with a cylindrical one.
The outer flat portion 1g is small in size, so that a small rotary electric component can be obtained. In addition, by providing the outer flat portion 1g, the cylindrical portion 1c can be made thicker than a cylindrical one. 1c having a high strength and having a reliable formation of the external thread portion 1b can be obtained. Further, a through hole 1j is provided at a position facing the outer flat portion 1g of the cylindrical portion 1c at an interval.
When the cover portion 1e is formed by bending, the cylindrical portion 1c can be prevented from being deformed by the tension generated in the flat plate portion 1a, and the through-hole 1j can be formed across the flat plate portion 1a and the cover portion 1e. By providing, the deformation of the cylindrical portion 1c can be further prevented.

A method of manufacturing a mounting portion in such a rotary electric component will be described with reference to FIGS. 27 to 32. FIGS. 27 to 32 show a fourth embodiment of a method of manufacturing a rotary electric component according to the present invention. An example is shown, and a flat metal plate K of a hoop material is sent out by an automatic machine in the same manner as in the second embodiment of the manufacturing method described above, and as shown in FIG. Drawing a metal plate K to form a cylindrical tubular part 1
Form c. Next, the metal plate K is sent to the next step, and as shown in FIG. 28, holes 14a are formed in the bottom plate portion 14 of the cylindrical portion 1c by punching with the pins 12 and the lower mold 13.
To form Then, as shown in FIGS. 29 and 30,
The jig 15 has a flat surface 15b and a male screw forming groove 15a formed between the flat surfaces 15b, is divided by the flat surface 15b, and is divided into four pieces joined by the flat surface 15b.
Is moved in the direction of the arrow in FIG. 30 so as to surround the outer periphery of the cylindrical portion 1c. At this time, the four jigs 15
Two pairs of flat surfaces 15b are combined in a cross shape by the flat surfaces 15b.
Is formed, and a gap is provided between the flat surface 15b and the outer periphery of the cylindrical portion 1c.

A jig 16 having a hole 16a is arranged below the bottom plate 14 of the cylindrical portion 1c.
A punch 17 having a large-diameter portion 17a and a small-diameter portion 17b is provided above c, and a punch 17 having a tapered portion 17d is disposed at the boundary. In addition, as shown in FIG.
The large diameter portion 17a has a columnar shape. Next, as shown in FIG. 32, when the punch 17 is pressed into the inside of the cylindrical portion 1c with the small diameter portion 17b of the punch 17 first, the large diameter portion 17a is formed.
Is formed larger than the inner diameter of the cylindrical portion 1c.
The large diameter portion 17a gradually forms the cylindrical portion 1c with the tapered portion 17d,
The cylindrical portion 1c is pushed outward by the large-diameter portion 17a and
5b to form an outer flat portion 1g,
The cylindrical portion 1c is cut into the male screw forming groove 15a to form the male screw portion 1b, and the small diameter portion 17b is pressed into the hole 14a of the bottom plate portion 14, and the bottom plate portion 14 is pushed outward by the small diameter portion 17b. The outer surface of the bottom plate 14 is
a small diameter portion 1d for supporting the operation shaft 2a is formed.

The subsequent manufacturing method is the same as that of the first embodiment of the manufacturing method described above, and the description thereof is omitted. Thus, when the cylindrical punch 17 is used,
The direction of the punch 17 with respect to the flat surface 15b is free, the productivity is good, and the punch 17 is simple and inexpensive.

FIGS. 33 and 34 show a rotary electric component according to a fourth embodiment of the present invention. The mounting plate 1 in this embodiment has a cylindrical portion 1c as shown in FIGS. A pair of outer flat portions 1g provided at positions facing each other on the outer circumference, a male screw portion 1b formed on the outer circumference positioned between the pair of outer flat portions 1g, and an outer flat portion provided on the outer circumference. Inner flat portion 1h provided on the inner periphery facing 1g
And Since other configurations are the same as those of the second embodiment shown in FIGS. 10 and 11, the same components are denoted by the same reference numerals and description thereof is omitted here.

When the outer flat portion 1g is provided on the outer periphery of the cylindrical portion 1c as described above, similar to the second embodiment,
Not only is this outer flat portion 1g positioned to the chassis on the set side, but also the cylindrical portion 1c is compared with a cylindrical one.
The outer flat portion 1g is small in size, so that a small rotary electric component can be obtained. In addition, by providing the outer flat portion 1g, the cylindrical portion 1c can be made thicker than a cylindrical one. 1c having a high strength and having a reliable formation of the external thread portion 1b can be obtained. Further, a through hole 1j is provided at a position facing the outer flat portion 1g of the cylindrical portion 1c at an interval.
When the cover portion 1e is formed by bending, the cylindrical portion 1c can be prevented from being deformed by the tension generated in the flat plate portion 1a, and the through-hole 1j can be formed across the flat plate portion 1a and the cover portion 1e. By providing, the deformation of the cylindrical portion 1c can be further prevented.

A method of manufacturing a mounting portion in such a rotary electric component will be described with reference to FIGS. 35 to 40. FIGS. 35 to 40 show a fifth embodiment of the method of manufacturing a rotary electric component according to the present invention. An example is shown, and a flat metal plate K of a hoop material is sent out by an automatic machine in the same manner as in the first embodiment of the manufacturing method described above, and as shown in FIG. Drawing a metal plate K to form a cylindrical tubular part 1
Form c. Next, the metal plate K is sent to the next step, and as shown in FIG. 36, holes 14a are formed in the bottom plate portion 14 of the cylindrical portion 1c by punching with the pins 12 and the lower mold 13.
To form Then, as shown in FIGS. 37 and 38,
The jig 15 has a flat surface 15b and an external thread forming groove 15a formed between the flat surfaces 15b, is divided by the flat surface 15b, and is divided into two by the flat surface 15b.
Is movable in the direction of the arrow in FIG. 38 so as to surround the outer periphery of the cylindrical portion 1c. At this time, the two jigs 15
A pair of opposed flat surfaces 15b that are joined by the flat surface 15b
Is formed, and a gap is provided between the flat surface 15b and the outer periphery of the cylindrical portion 1c.

A jig 16 having a hole 16a is arranged below the bottom plate 14 of the cylindrical portion 1c.
A punch 17 having a large-diameter portion 17a and a small-diameter portion 17b is provided above c, and a punch 17 having a tapered portion 17d is disposed at the boundary. Further, as shown in FIG.
The large-diameter portion 17a is provided with a pair of flat surfaces 17c provided at positions facing each other. Next, as shown in FIG. 40, the small-diameter portion 17b of the punch 17 comes first, and the flat surface 17c faces the flat surface 15b of the jig 15,
When the punch 17 is pressed into the inside of the cylindrical portion 1c, the large-diameter portion 1
Since the outer diameter of 7a is formed larger than the inner diameter of the cylindrical portion 1c, the large diameter portion 17a gradually pushes the cylindrical portion 1c outward with the tapered portion 17d, and the cylindrical portion 1c with the flat surface 17c. Is pressed against the flat surface 15b to form the outer flat portion 1g and the inner flat portion 1h, and the cylindrical portion 1c is connected to the male screw forming groove 15b.
a to form a male screw portion 1b, the small diameter portion 17b is pressed into the hole 14a of the bottom plate portion 14, and the bottom plate portion 14 is pushed outward by the small diameter portion 17b. 16 is pressed against the hole 16a of the
The small-diameter portion 1d for supporting a is formed.

The subsequent manufacturing method is the same as that of the first embodiment of the manufacturing method described above, and the description is omitted. The jig 15 thus divided into two pieces
Is used, the external thread portion 1b can be enlarged, and a strong external thread portion 1b can be obtained.

[0035]

The rotary electric component of the present invention has a flat plate portion 1a.
And the cylindrical portion 1 formed by drawing from the flat plate portion 1a
c and the external thread portion 1b provided on the outer periphery of the cylindrical portion 1c, the mounting portion 1 is formed. Therefore, the mounting portion 1 can be formed from a metal plate, and is less expensive than a conventional zinc die-cast product. We can provide electrical components. When the outer flat portion 1g is provided on the outer periphery of the cylindrical portion 1c, not only is the outer flat portion 1g positioned to the chassis on the set side, but also the outer flat portion 1g is flatter than the cylindrical portion 1c. The portion 1g is small in size, and a small rotary electric component is obtained. Further, by providing the outer flat portion 1g and the inner flat portion 1h, the cylindrical portion 1c can be made thicker than the cylindrical portion, the strength of the cylindrical portion 1c is high, and the male screw portion 1b is provided. The formation of which is reliable. Further, since the cover portion 1e is provided integrally with the flat plate portion 1a, it is possible to provide an inexpensive electric component having good assemblability with a reduced number of components as compared with a conventional device using separate components.

Further, the through-hole 1j is provided at a position facing the outer flat portion 1g of the tubular portion 1c at a distance from the outer flat portion 1g, so that when the cover portion 1e is formed by bending, the tubular portion 1c is formed by tension generated in the flat plate portion 1a. Can be prevented from being deformed, and a highly accurate rotary electric component can be provided. Further, by providing the through hole 1j over the flat plate portion 1a and the cover portion 1e, deformation of the tubular portion 1c can be further prevented, and a more accurate rotary electric component can be provided. Further, since the mounting leg 1f is provided integrally with the flat plate portion 1a or the cover portion 1e, the mounting leg 1f can be configured with one component, and the number of components is small, and an electric component with good productivity can be provided. In addition, since the small-diameter portion 1d supports the rotation of the operation shaft 2a, it is possible to provide an electric component that has little friction between the two and can operate smoothly.

The method for manufacturing an electric component according to the present invention comprises the steps of forming a cylindrical portion 1c by drawing a flat plate portion 1a made of a flat metal plate K, and forming a male screw forming groove on the outer periphery of the cylindrical portion 1c. A jig 15 divided into a plurality of jigs 15a is disposed, a punch 17 is press-fitted into the inside of the cylindrical portion 1c, and the cylindrical portion 1c is cut into the male screw forming groove 15a to form the cylindrical portion 1c.
Since the method includes the step of forming the external thread portion 1b on the outer periphery of the mounting member 1, the mounting portion 1 can be easily manufactured from the metal plate K, and a method for manufacturing an inexpensive electric component can be provided. Also, in the step of forming the cylindrical portion 1c, the cylindrical portion 1c is formed in a polygonal shape, so that the cylindrical portion 1c can be made thick, the strength of the cylindrical portion 1c is high, and the male screw portion 1b is formed. It is possible to provide a method for manufacturing a rotary electric component which is suitable for a device using a thin plate material while ensuring formation. Also, by providing the jig 15 with a flat surface 15b for forming the outer flat portion 1g, the cylindrical portion 1c can be made thicker than a cylindrical one, and the strength of the cylindrical portion 1c can be reduced. It is possible to provide a method for manufacturing a rotary electric component which is expensive and in which the formation of the external thread portion 1b is reliable. In addition, compared to zinc die-casting, the cold-rolled steel plate used has a higher strength, so that it is possible to provide a thin and light electric component.

The jig 15 divided into a plurality of parts has an external thread forming groove 15a formed between the flat surfaces 15b, is divided by the flat surface 15b, and can be joined by the flat surface 15b. Therefore, it is possible to provide a method for manufacturing a rotary electric component in which the formation of the external thread portion 1b is reliable and the accurate external thread portion 1b can be formed. Further, since a plurality of jigs 15 can be fitted with a gap between the flat surface 15b and the outer periphery of the cylindrical portion 1c, the jigs 15 can be used to fit the cylindrical portions 1c. And the repeated flattening causes wear of the mating surface, and even if a small gap is formed in the mating surface and burrs are generated on the outer flat portion 1g, the outer flat portion 1g Since 1g is lower than the male screw portion 1b, there is no hindrance to screwing the nut, and a method of manufacturing a rotary electric component that can use the jig 15 for a long time can be provided. Further, the punch 17 is provided with a flat surface 17c for forming the inner flat portion 1h, so that the cylindrical portion 1c can be made thicker than a cylindrical one, and the strength of the cylindrical portion 1c is increased. It is possible to provide a method for manufacturing a rotary electric component which is expensive and in which the formation of the external thread portion 1b is reliable.

Further, since there is a process of forming the cover portion by bending or drawing the flat plate portion 1a, the cover portion 1 is integrally formed with the flat plate portion 1a by simple processing.
e can be formed, and an inexpensive method for producing an electric component with good productivity can be provided. In addition, since the method includes the step of forming the mounting leg 1f from the cover portion 1e or the flat plate portion 1a, the mounting leg 1f can be formed by simple processing, and a method of manufacturing an electric component with good productivity can be provided. The punch 17 has a large diameter portion 17a and a small diameter portion 17b provided at an end of the large diameter portion 17a.
A step of press-fitting the large-diameter portion 17a and the small-diameter portion 17b into the cylindrical portion 1c to form a support portion for supporting the operation shaft 2a matching the small-diameter portion 1d in the cylindrical portion 1c. Therefore, the support portion of the operation shaft 2a can be easily formed, and a method of manufacturing an electric component with good productivity can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of a rotary electric component according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is an explanatory view for explaining a first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 4 is an explanatory view for explaining a first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 5 is an explanatory view for explaining the first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 6 is an explanatory view for explaining the first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 7 is an explanatory view for explaining the first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 8 is an explanatory diagram for explaining the first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 9 is an explanatory view for explaining the first embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 10 is a development view of a mounting portion according to a second embodiment of the rotary electric component of the present invention.

FIG. 11 is a sectional view taken along line 11-11 in FIG. 10;

FIG. 12 is an explanatory view illustrating a second embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 13 is an explanatory view illustrating a second embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 14 is an explanatory view illustrating a second embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 15 is a sectional view taken along line 15-15 of FIG. 14;

FIG. 16 is a sectional view taken along line 16-16 in FIG. 14;

FIG. 17 is an explanatory diagram for describing a second embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 18 is an explanatory view illustrating a third embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 19 is an explanatory view illustrating a third embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 20 is an explanatory diagram for describing a third embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 21 is an explanatory diagram for describing a third embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 22 is a sectional view taken along line 22-22 in FIG. 21;

FIG. 23 is a sectional view taken along line 23-23 of FIG. 21;

FIG. 24 is an explanatory view illustrating a third embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 25 is an exploded view of a mounting portion according to a third embodiment of the rotary electric component of the present invention.

FIG. 26 is a sectional view taken along line 26-26 of FIG. 25;

FIG. 27 is an explanatory diagram for explaining a fourth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 28 is an explanatory diagram for describing a fourth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 29 is an explanatory diagram for describing a fourth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 30 is a sectional view taken along line 30-30 in FIG. 29;

FIG. 31 is a sectional view taken along line 31-31 of FIG. 29;

FIG. 32 is an explanatory diagram for describing a fourth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 33 is an exploded view of a mounting portion according to a fourth embodiment of the rotary electric component of the present invention.

FIG. 34 is a sectional view taken along line 34-34 of FIG. 33;

FIG. 35 is an explanatory diagram for describing a fifth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 36 is an explanatory view illustrating a fifth embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 37 is an explanatory diagram for describing a fifth embodiment of the method for manufacturing a rotary electric component according to the present invention.

FIG. 38 is a sectional view taken along line 38-38 in FIG. 37;

FIG. 39 is a sectional view taken along the line 39-39 in FIG. 37;

FIG. 40 is an explanatory view illustrating a fifth embodiment of the method of manufacturing a rotary electric component according to the present invention.

FIG. 41 is a side view of a conventional rotary electric component.

FIG. 42 is a sectional view taken along the line 42-42 in FIG. 41;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment part 1a Flat plate part 1b Male screw part 1c Tubular part 1d Small diameter part 1e Cover part 1f Attachment leg 1g Outer flat part 1h Inner flat part 1j Through hole 1k Cylindrical surface 2 Operating member 2a Operating shaft 2b Rotating body 3 Slider Reference Signs List 4 Insulating substrate 5 Resistor 6 Conductor 7 Printed circuit board K Metal plate 10 Upper die 11 Lower die 12 Pin 13 Lower die 14 Bottom plate 14a Hole 15 Jig 15a Male screw forming groove 15b Flat surface 16 Jig 16a hole 17 Punch 17a Large diameter part 17b Small diameter part 17c Flat surface 17d Tapered part T1 dotted line T2 two-dot chain line

Claims (17)

[Claims] 1. A mounting portion having a flat plate portion constituting a front side plate and the like and a tubular portion formed by drawing from the flat plate portion, and a male screw portion is formed on an outer periphery of the tubular portion. A rotary electric component, wherein an operation shaft is inserted into the cylindrical portion. 2. An outer periphery of the cylindrical portion is provided with a pair or two pairs of outer flat portions at positions opposed to each other, and the outer peripheral portion of the cylindrical portion located between the adjacent outer flat portions is provided with the outer flat portion. The rotary electric component according to claim 1, wherein a male screw portion is formed. 3. The rotary electric machine according to claim 2, wherein an inner flat portion is formed on an inner periphery of the tubular portion, facing the outer flat portion provided on an outer periphery of the tubular portion. parts. 4. The rotary electric component according to claim 1, wherein a cover portion is provided integrally with the flat plate portion. 5. The rotary electric machine according to claim 4, wherein a through hole is provided in the flat plate portion at a position facing an outer flat portion provided on an outer periphery of the cylindrical portion at an interval. parts. 6. The flat panel according to claim 5, wherein the through-hole is provided over the flat plate and the cover, and the cover is bent from the flat plate at the position of the through-hole. The described rotary electrical component. 7. The device according to claim 1, wherein a mounting leg is provided integrally with said flat plate portion or said cover portion.
7. The rotary electric component according to 4, 5, or 6. 8. A small-diameter portion is provided at an inner end of the cylindrical portion,
The rotary electric component according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the operation shaft is supported by the small diameter portion. 9. A step of forming a cylindrical portion by drawing a flat plate portion made of a flat metal plate and arranging a plurality of jigs having a male screw forming groove on the outer periphery of the cylindrical portion. ,
A step of pressing a punch into the inside of the cylindrical portion, forming the male portion on the outer periphery of the cylindrical portion by biting the cylindrical portion into the male screw forming groove, and inserting an operation shaft into the cylindrical portion. And a method of manufacturing a rotary electric component. 10. The method according to claim 9, wherein in the step of forming the cylindrical portion, the cylindrical portion is formed in a polygonal shape. 11. The jig divided into a plurality of jigs includes at least a pair of flat surfaces provided at positions facing each other and the male screw forming groove provided at a position between the adjacent flat surfaces. 11. The rotary electric component according to claim 9, wherein an outer flat portion and an external thread portion are formed on an outer periphery of the tubular portion by press-fitting the punch into the inside of the tubular portion. Production method. 12. The method according to claim 11, wherein the jig divided into a plurality of pieces is divided at the position of the flat surface. 13. After disposing the jig divided into a plurality of pieces on the outer periphery of the cylindrical portion in a state where a gap is provided between the flat surface of the jig and the outer periphery of the cylindrical portion. 13. The method for manufacturing a rotary electric component according to claim 11, wherein the punch is pressed into the inside of the cylindrical portion. 14. The punch has at least a pair of flat surfaces at positions facing each other, and the punch is placed in a state where the flat surface of the punch faces the flat surface of the jig. The inner flat surface is formed on an inner periphery of the tubular portion by press-fitting into the inside of the tubular portion and facing the outer flat portion on the outer periphery of the tubular portion.
14. The method for producing a rotary electric component according to 2 or 13. 15. The method according to claim 9, further comprising a step of forming a cover portion by bending or drawing the flat plate portion.
A method for manufacturing the rotary electric component according to the above. 16. The rotary electric component according to claim 9, further comprising a step of forming a mounting leg from the cover portion or the flat plate portion. Production method. 17. The punch has a large-diameter portion and a small-diameter portion provided at an end of the large-diameter portion, and press-fits the large-diameter portion and the small-diameter portion into the inside of the cylindrical portion. 9. The method according to claim 9, further comprising the step of forming a bearing for supporting the operating shaft in the shape of the small diameter portion.
17. The method for producing a rotary electric component according to 3, 14, 15, or 16.