JPH11340012A - Rotary electrical parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide inexpensive rotary electrical parts which have a simple structure and can be reduced in size and weight. SOLUTION: Rotary electrical parts are provided with a first member 6 having a through hole 35, a second member 2 provided with a cylindrical section 29, a slidably contacting section 30 which is brought into slidable contact with the first member 6, and a catch member 4 having a catch section 32 erected from the contacting section 30. The first and second members 6 and 2 are connected to each other in a relatively rotatable state between the slidably contacting section 30 and the front end section of the catch section 32 by inserting the cylindrical section 29 of the second member 2 into the through hole 35 of the first member 6 and bringing the contacting section 30 of the catch member 4 into contact with the first member 6, and then, inserting the catching section 32 into the cylindrical section 29 of the second member 2 and engaging a front end section 7 with the cylindrical section 29 in a bent state.

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 more particularly to a connection structure between a fixed member and a rotary member.

[0002]

FIG. 23 is a sectional view of a conventional variable resistor. As shown in the drawing, a slider receiver 101 is connected to a lower end of a rotary shaft 100 serving as a knob, and a slider 102 is supported on a lower surface of the slider receiver 101. The slider 102 contacts a resistance pattern (not shown) formed on the printed circuit board 103, and the slider receiver 101 is connected to the printed circuit board 103.
The slide holder 101 and the printed circuit board 103 are accommodated in a case 105, and the opening of the case 105 is closed by the cover member 104.

[0003]

In this conventional structure, the printed circuit board 1 is used to rotatably support the slider receiver 101.
03 and the cover member 104 are required, and the slider receiver 101 and the printed circuit board 103 are housed in the case 105 and the cover member 104, so that the number of parts increases, the structure becomes complicated, the size increases, and the weight increases. However, it has disadvantages such as heavy weight and high cost.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a rotary electric component which has a simple structure, can be reduced in size and weight, and is inexpensive.

[0005]

In order to achieve the above object, the present invention provides a first member (for example, a base or the like) having a through hole and a second member (for example, a sliding member) provided with a cylindrical portion. A sliding member receiver supporting the child), a sliding contact portion slidingly contacting the first member, and a stopper member having a stopper portion erected from the sliding contact portion. The cylindrical portion is inserted into the through-hole of the first member, the sliding portion of the stop member is brought into contact with the first member, and the stop portion is inserted into the cylindrical portion of the second member, and the tip portion is inserted. The first member and the second member are relatively rotatably connected between the sliding contact portion and the distal end portion of the stopper by bending and engaging with the cylindrical portion. It is.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has the above-described structure, and the first member and the second member are relatively rotatably connected by one stopper member. A lid member and a case are not required, the structure is simple, the size and weight can be reduced, and a low-cost rotary electric component can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially exploded perspective view of a variable resistor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the variable resistor,
3 is a plan view of the slider receiver, FIG. 4 is a bottom view of the slider receiver, FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3, and FIG.
7 is a front view of the slider, FIG. 8 is a plan view of the slider, FIG. 9 is a side view of the slider, FIG. 10 is a front view of the stopper, and FIG. FIG. 12 is a plan view of the member, and FIG.
13 is a partially enlarged view showing a holding structure of the slider with respect to the slider receiver, FIG. 14 is an enlarged plan view of a holding recess formed in the slider receiver, and FIG. FIG. 4 is an explanatory view showing a nested arrangement for forming a holding recess.

As shown in FIGS. 1 and 2, the variable resistor mainly comprises a rotary shaft 1 serving as a knob, a rotary body 5, and a base 6. The rotary body 5 is provided with a slider receiver 2 and a sliding member. It consists of a moving element 3 and a stop member 4. Lower end 7 of rotating shaft 1 and rotating body 5
The center hole 8 of the (slider receiver 2) is non-circular (for example, D-shaped)
The rotating shaft 1 and the rotating body 5 are integrated by press-fitting (strongly fitting) the lower end portion 7 into the central hole 8. A resistance pattern (not shown) is formed on the surface of the base 6 on which the slider 3 slides, and each resistance pattern is connected to a plurality of terminals 9 held on the base 6.

The slider receiver 2 is formed of a synthetic resin molded body, and has a cylindrical portion 29 (see FIGS. 2, 4 and 5) having a substantially D-shaped central hole 8 formed at the center thereof. An insertion groove 10 is provided on a side surface of the hole 8 corresponding to the D-shaped flat portion 8c, and an engaging recess 11 extending radially outward is formed at an upper portion of the insertion groove 10 (periphery of the opening of the central hole 8). I have.

[0010] As shown in FIG.
Predetermined depth on both sides with center hole 8 in between (see Fig. 6)
Is formed. Holding recess 12
As shown in FIG. 14, the first cubic space 13 and the second cubic space 14 arranged side by side at a predetermined interval,
The first cubic space 13 and the second cubic space 14
Cubic space 15 provided so as to bridge
Consists of

A projection 17 having a flat side end surface 16 is formed between the first cubic space 13 and the second cubic space 14, and the first cubic space 13 and the third cubic space 15 are formed.
14 (dotted line portion in FIG. 14), and the overlapping portion (dotted line portion in FIG. 14) of the second cubic space portion 14 and the third cubic space portion 15 are formed with narrow portions 18, respectively. The corners of the projection 18 corresponding to the corners of the projection 17 are receiving portions 19, 19. The width of the narrow portion 18 is
As shown in FIG. 13, the thickness is sufficiently larger than a plate thickness of a plate portion 20 of the slider 3 described later.

[0012] As shown in FIG.
The holding recess 12 has a first side surface 21 and a second side surface 22 which are opposed to each other, and has a projection 17 at a substantially central portion of the first side surface 21. Are provided, and receiving portions 19 are provided on both sides of the projection 17 of the second side surface 22.

As shown in FIG. 15, the mold for forming the crank-shaped holding recess 12 is a combination of nested dies 23 to 25. In the present embodiment, the first nested die 23 and the second nested die 23 are used. The third nesting mold 25 is disposed between the first and second nesting molds 24, and each of the nesting dies 23 to 25 is formed in a block shape.

The first cubic space 13 is formed by the first nest 23 and the second cubic space 14 is formed by the second nest 24.
However, the third cubic molds 25 form the third cubic space portions 15, respectively. Further, the narrow portions 18, 18 are formed by the overlapping portion of the first nesting die 23 and the third nesting die 25 and the overlapping portion of the second nesting die 24 and the third nesting die 25.

The slider 3 is made of an elastic metal plate such as phosphor bronze, and has a plurality of "-" shaped sliding portions 26 at predetermined positions as shown in FIGS. Have been. On both sides of the sliding portion 26, fixing plate-like portions 20, 20 protrude in the opposite direction to the sliding portion 26, and protrude outward at substantially the center of each plate-like portion 20, as shown in FIG. A substantially hemispherical projection 27 is formed.

As shown in FIG. 13, the plate portion 20 is press-fitted into the crank-shaped holding recess 12, but the narrow portion 18 is sufficiently larger than the plate thickness of the plate portion 20 so that the plate portion 20 cannot be inserted. Easy. As shown in FIG.
7 comes into contact with the side end surface 16 of the projection 17, and the outer portions 28, 28 are received by the receiving portions 19, 19 from the center of the plate-shaped portion 20, and are elastically formed so as to project toward the receiving portion 19. Bend. The slider 3 is securely and stably held by the slider receiver 2 by the elastic deformation of the plate portion 20.

The stopper member 4 rotatably attaches the slider receiver 2 with the slider 3 to the base 6 and
It has a function of properly holding the sliding contact pressure of the slider 3 against the (resistance pattern). The stopper member 4 is made of a thin metal plate, has a substantially plate-like planar shape as shown in FIG. 11, has an annular flat sliding contact portion 30, and has a sliding contact portion 30.
A stepped portion 31 for reinforcement is formed in an annular shape on the outer peripheral portion.
1 that extends in the axial direction by being cut and raised inside the sliding contact portion 30
A flat stop piece 32 having a convex front shape is formed, and a convex notch hole 33 is formed in the center of the sliding contact portion 30 by cutting and raising the stop piece 32. The notch hole 33 is formed as described above. It is formed larger than the central hole 8.

As shown in FIG. 2, an annular groove 34 is formed on the lower surface of the base 6 so as to escape from the step 31 of the stopper member 4. The outer diameter of the cylindrical portion 29 of the slider receiver 2 is concentric with the annular groove 34. A slightly larger diameter through hole 35 is provided.

Next, the assembly of the variable resistor will be described. The slider 3 is attached to the slider receiver 2 so that the sliding portion 26 faces downward as shown in FIG. 2 (see FIG. 13), and the slider receiver 2 is inserted from above the base 6 to slide. By inserting the cylindrical portion 29 of the child receiver 2 into the through hole 35 of the base 6 until the flange-shaped contact portion 29a provided on the outer periphery of the cylindrical portion 29 comes into contact with the base 6, the cylindrical portion 29 The lower half is rotatably fitted in the through hole 35 so that the sliding portion 26 comes into contact with a resistance pattern (not shown) on the base 6. As shown in the figure, the lower end surface of the cylindrical portion 29 is flush with the lower surface 36 inside the annular groove 34 of the base 6.

Next, as shown in FIG. 10, the stopper member 4 with the stopper piece 32 facing upward is inserted from below the center hole 8 of the slider receiver 2, and the stopper piece 32 is inserted inside the slider receiver 2. The upper end 37 of the stopper 32 is bent outward in the radial direction as shown in FIG. Since the insertion groove 10 is formed on the side surface corresponding to the flat portion of the center hole 8, the flat stopper 32 is in close contact with the side surface, and the stopper member 4 is engaged so that the stopper member 4 can rotate integrally with the slider receiver 2. Combine.

The bending of the stopper 32 allows the slider receiver 2 to be rotatably attached to the base 6,
The sliding contact pressure of the slider 3 against the (resistance pattern) is appropriately maintained.

Since the stopper piece 32 is housed in the insertion groove 10, it does not protrude into the center hole 8 (see FIG. 1), so that the lower end 7 of the rotating shaft 1 is pressed into the center hole 8 (strong fitting). ) Does not hinder you. In order to facilitate press-fitting (strong fitting) of the rotating shaft 1, an inclined surface 38 is formed around the central hole 8 as shown in FIGS. 3 and 5.

FIG. 16 is an enlarged plan view showing a modified example of the holding recess 12, and FIG. 17 is an explanatory diagram showing a nested arrangement for forming the holding recess 12. In the above embodiment, as shown in FIG. 15, the third nesting mold 25 is sandwiched between the first nesting mold 23 and the second nesting mold 24, but in the case of this modification, it is shown in FIG. Like the third nest 2
5 has a first nest 23 and a second nest 2
4 partially overlaps the side.

Accordingly, the shape of the holding recess 12 is as shown in FIG. 16, the corner of the projection 17 and the corner of the receiving portion 19 are arranged in a straight line, and a narrow portion 18 is formed between both corners. . In the case of this modification as well, the projection 27 of the plate-shaped portion 20 abuts against the side surface of the projection 17, and both sides of the projection 27 are curved so as to be received by the receiving portions 19, 19, as in the above embodiment. .

FIGS. 18 and 19 are a plan view and a front view showing a modified example of the stopper member 4, and FIG. 20 is an explanatory view showing an engagement state between the stopper member 4 and the central hole 8. In the above-described embodiment, one stop piece 32 is formed as shown in FIG. 10, but in this modification, two stop pieces 32a and 32b face each other (obliquely facing or front facing) with the cutout hole 33 interposed therebetween. It is erected. As shown in FIG. 20, the shape of the center hole 8 of the slider receiver 2 is an oval shape, and the stop pieces 32a and 32b are in close contact with the flat surface of the center hole 8.

FIGS. 21 and 22 are a plan view and a front view, respectively, showing another modification of the stopper member 4. In this modification, a plurality of stopper pieces 32 are divided by slits 39 extending in the axial direction. ing.

In the above-described embodiment, the resistor is provided on the substrate 6 and the slider 3 is provided on the slider receiver 2. However, the slider 3 integrated with the terminal 9 is provided on the substrate 6, and the slider 3 is provided. In some cases, a resistor is formed in the receiver 2.

Although the above embodiment has been described with reference to a case where a variable resistor is used as an electric component, the present invention can be applied to various other rotary electric components such as a rotary switch and an encoder.

[0029]

According to the first aspect of the present invention, the first member and the second member are relatively rotatably connected by one stopper member. It is not necessary to provide a rotary electric component which is unnecessary, has a simple structure, can be reduced in size and weight, and is inexpensive.

According to the present invention, the engagement between the stop member and the second member is stabilized by the flat portion.

According to the fifth aspect of the present invention, it is possible to reduce the material cost and provide a low-cost rotary electric component.

According to the sixth aspect of the present invention, the sliding contact portion can be reinforced by forming the step portion.

According to the seventh aspect of the present invention, since the first member is formed with the annular groove for accommodating the stepped portion, the height of the rotary electric component can be reduced, and the size can be further reduced.

According to the eighth aspect of the present invention, since the engaging recess for accommodating the tip of the stopper is formed in the second member, the height of the rotary electric component is reduced, and the size is further reduced. it can.

According to the ninth aspect of the present invention, since the groove for inserting the stopper is formed in the cylindrical portion of the second member, the stopper does not protrude from the peripheral surface of the central hole. Therefore, there is no problem in press-fitting the shaft into the center hole.

According to the tenth aspect of the present invention, the structure is simple, the size and weight can be reduced, and the variable resistor can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of a variable resistor according to an embodiment of the present invention.

FIG. 2 is a sectional view of the variable resistor.

FIG. 3 is a plan view of a slider receiver used for the variable resistor.

FIG. 4 is a bottom view of the slider receiver.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 4;

FIG. 7 is a front view of a slider used for the variable resistor.

FIG. 8 is a plan view of the slider.

FIG. 9 is a side view of the slider.

FIG. 10 is a front view of a stop member used for the variable resistor.

FIG. 11 is a plan view of the stopper member.

FIG. 12 is a sectional view taken along line 12-12 in FIG. 11;

FIG. 13 is a partially enlarged view showing a structure for holding a slider with respect to a slider receiver.

FIG. 14 is an enlarged plan view of a holding recess formed in a slider receiver.

FIG. 15 is an explanatory view showing a nested arrangement for forming the holding recess.

FIG. 16 is an enlarged plan view of a holding recess according to a modification.

FIG. 17 is an explanatory view showing a nested arrangement for forming the holding recess.

FIG. 18 is a plan view of a stopper according to a modification.

FIG. 19 is a front view of the stopper member.

FIG. 20 is an explanatory view showing an engagement state between a stopper of the stopper member and a slider receiver.

FIG. 21 is a plan view of a stopper according to still another modification.

FIG. 22 is a front view of the stopper member.

FIG. 23 is a sectional view of a conventional variable resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation shaft 2 Slider receiver 3 Slider 4 Stopping member 5 Rotating body 6 Base 7 Lower end 8 Center hole 8c Flat part 10 Insertion groove 11 Engagement concave part 12 Holding concave part 13 First cubic space part 14 Second Cube space part 15 Third cubic space part 16 Side end face 17 Protrusion part 18 Narrow part 19 Receiving part 20 Plate part 21 First side surface 22 Second side surface 23 First nesting type 24 Second nesting type 25th 3 telescopic type 26 sliding part 27 protruding part 28 outer part 29 cylindrical part 30 sliding contact part 31 step part 32 stopper piece 34 annular groove 35 through hole 36 lower surface 37 upper end part 38 inclined surface 39 slit

Claims (10)

[Claims] A first member having a through-hole, a second member having a tubular portion, a sliding contact portion slidingly contacting the first member, and a standing portion provided from the sliding contact portion. A stop member having a stop portion, wherein a cylindrical portion of the second member is inserted into a through hole of the first member, and a sliding contact portion of the stop member contacts the first member, and the stop By inserting the portion into the cylindrical portion of the second member and bending the distal end portion to engage with the cylindrical portion, the first member and the second member are located between the sliding contact portion and the distal end portion of the stopper. A rotary electric component wherein members are relatively rotatably connected. 2. The rotary electric component according to claim 1, wherein the cylindrical portion has a flat portion on an inner peripheral surface thereof, and the stop portion is in contact with the flat portion. 3. The cylindrical part according to claim 2, wherein a hole shape of the cylindrical part is substantially D-shaped, and a flat stop part is in contact with a flat part of an inner peripheral surface of the cylindrical part. And rotary electric parts. 4. The cylindrical part according to claim 2, wherein the cylindrical part has a substantially oval hole shape, the stopper has a pair of flat stoppers, and the inner peripheral surface of the cylindrical part is flat. A rotary electric component characterized in that a stop portion abuts on the portion. 5. The rotary electric component according to claim 1, wherein the stopper is made of a metal plate, and the stopper is formed by cutting and raising. 6. The rotary electric component according to claim 1, wherein a step portion is formed on an outer periphery of the sliding contact portion of the stop member. 7. The rotary electric machine according to claim 6, wherein an annular groove is formed at a position of the first member facing the step, and the step is housed in the annular groove. parts. 8. The rotary electric component according to claim 1, wherein an engagement recess for accommodating a tip of a stopper is formed at an open end of the cylindrical portion of the second member. 9. The rotary electric component according to claim 1, wherein a groove into which a stopper is inserted is formed in the cylindrical portion of the second member. 10. The device according to claim 1, wherein the first member is a base on which a resistance pattern is formed, and the second member is a slider receiver supporting a slider that slides on the resistance pattern. A rotary electric component characterized by the following.