JPH11260605A - Rotary electrical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent electric continuity between a resistor and a conductor due to the migration of the conductor accompanied by reduction in the edge surface distance between the resistor and the conductor as it becomes miniaturized. SOLUTION: In this electrical component, a first flat surface 5b and a second flat surface 5d formed in a stepped manner by providing a step portion 5c from the first flat surface 5b are provided on a rotator 5, and conduction patterns P are provided on the first flat surface 5b and the second flat surface 5d, respectively, so as to enable increase in the edge surface distance between the conduction patterns P. Thus, the continuity between the conduction patterns P due to migration can be prevented, and the electrical component can be provided which is suitable as it becomes miniaturized.

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 particularly suitable for use in a semi-fixed type variable resistor.

[0002]

2. Description of the Related Art A conventional variable resistor will be described with reference to FIGS. 11 and 12. On a flat surface of an insulating substrate 31 made of a synthetic resin or the like having a hole 31a, a resistor 3 is formed in an arc shape.
2a and a conductor 32b made of silver paste are juxtaposed,
Terminal portions 33 made of silver paste or the like are formed at both ends of the resistor 32a. The rotating member 34 made of a single metal plate has a first plate-shaped portion 35 and a second plate-shaped portion 36 which are punched and bent.
Has a hole 35a at the center, has a convex portion 35b formed by drawing, and a slider 35c provided at the outer peripheral portion, and the second plate-shaped portion 36 has It has a slotted driver groove 36a. Then, the first and second plate-like portions 35 and 36 are connected to the connecting portion 3 serving also as the stopper portion 37.
8 and bends this connecting portion 38 in two,
And the second plate portions 35 and 36 are opposed to each other and overlapped.

A mounting plate 39 made of a metal plate has a shaft 39a formed at the center by drawing, and a stopper portion 39b formed by bending. It is arranged on the other side and the shaft 3
9 a is inserted into the hole 31 a of the insulating substrate 31, and the stopper portion 39 b is arranged so as to protrude upward from a side portion of the insulating substrate 31. Then, the hole 35a of the first plate-shaped portion 35
The shaft 39a is inserted into the shaft 3
A rotating member 34 is rotatably attached to 9a. When the rotating member 34 is attached, the slider 35c comes into contact with the resistor 32a, and a driver (not shown) is inserted into the driver groove 36a to rotate the rotating member 34. The slider 38 slides on the resistor 32 to vary the resistance value, and the stopper 38
, The rotation of the rotating member 34 is stopped.

[0004]

However, in the conventional rotary electric component, the resistor 32a and the conductor 32b are arranged side by side on the flat surface of the insulating substrate 31, and as the size of the resistor decreases, the resistor 32a becomes smaller. In the case where the edge distance between the conductor 32b and the conductor 32b is reduced, the resistor 32a and the conductor 32b are short-circuited due to the migration of the conductor 32b, or when the gap between the two is reduced for downsizing. In addition, there is a problem in that the resistor 32a and the conductor 32b are short-circuited due to printing misalignment. Further, a stopper portion 39 of a mounting plate 39 protruding from the outer periphery of the insulating substrate 31.
Since the stopper is constituted by a and the stopper portion 37 of the rotating member 34, there is a problem that the stopper becomes larger in the radial direction and becomes larger.

[0005]

Means for Solving the Problems As a first means for solving the above problems, there is provided a rotating body made of an insulating material rotatably attached to an insulating base, and one side of the rotating body is provided with: A first flat surface and a second flat surface formed with a step by providing a step portion from the first flat surface;
The conductive patterns were formed on the flat surfaces.
Further, as a second solving means, the step portion forming the second flat surface is formed in an arc shape, and a convex portion projecting from the second flat surface is provided at an end portion of the arc-shaped step portion. The stopper portion was formed. Further, as a third solution, an inclined portion is provided in a part of the step portion formed between the first flat surface and the second flat surface, and a connection conductor is provided in the inclined portion to form the third portion. 1 and the conductive pattern formed on the second flat surface were connected. As a fourth solution, the rotating body is formed of a ceramic material.
Further, as a fifth solving means, a contact member held by the insulating base and a terminal held by the insulating base and provided with a shaft portion are provided, and at least a part of the conductive pattern is formed of a resistor. The contact member is brought into contact with the conductive pattern to obtain a variable resistance value.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary electric component of the present invention, for example, a semi-fixed type variable resistor will be described with reference to the drawings. FIGS. 1 to 10 relate to a rotary electric component of the present invention. 1 is a plan view, FIG. 2 is a side view, and FIG.
4 is a perspective view of the rotating body, FIG. 5 is a plan view of the rotating body, FIG. 6 is a bottom view of the rotating body, FIG. 7 is a side view of the rotating body, and FIG. Sectional view taken along line 8-8 of FIG.
FIG. 9 is a sectional view taken along the line 9-9 in FIG. 6, and FIG. 10 is an explanatory view showing the manufacture thereof.

Next, a variable resistor, which is a rotary electric component of the present invention, will be described with reference to FIGS. And a stopper portion 1b provided on a part of the outer periphery. The insulating base 1 has a terminal 2 made of a metal plate.
And a pair of contact members 3 and 4 made of a spring metal plate are embedded and integrated. The terminal 2 has a shaft portion 2b formed by drawing and having a shoulder portion 2a. Note that the shaft portion 2b may be formed separately from the terminal 2 and may be combined with each other. The pair of contact members 3 and 4 include bases 3a and 4a, contact portions 3b and 4b extending from one end of the bases 3a and 4a, and terminal portions 3c and 4c extending from the other ends of the bases 3a and 4a, respectively. have.

The terminal 2 having the shaft 2b and the pair of contact members 3, 4 are attached to the insulating base 1 by arranging the terminal 2 and the contact members 3, 4 in a state as shown in FIG. Then, as shown in FIG. 10B, the insulating base 1 is formed by molding a synthetic resin, and the terminals 2 and the contact members 3, 4 are embedded in the insulating base 1. After the embedding, the terminal 2 is
The contact member 3 is bent at a right angle at the line S1 at A of 0, and the contact member 3 is bent at a right angle at the line S2 and at 180 degrees at the line S3 to position the contact portion 3b in the concave portion 1a of the insulating base 1, Further, the contact member 4 is manufactured by bending the contact member 4 at a right angle at the line S4 and at 180 degrees at the line S5 so that the contact portion 4b is located in the concave portion 1a of the insulating base 1.

The rotating body 5 made of a ceramic material is
It has an octagonal shape, and has a through hole 5a provided in the center, a first flat surface 5b provided on one surface side which is a lower surface, and a stepped portion 5c provided from the outer peripheral edge of the first flat surface 5b. Formed at the end of the step 5c, and at the end of the arc-shaped step 5c, a protrusion protruding from the second flat surface 5d is formed. A stopper portion 5f and a cross-shaped driver groove 5g provided on the other side surface which is the upper surface. 4 and 6, the first flat surface 5b of the rotating body 5 has a resistor 6
And a good conductor 7 made of silver paste or the like connected to the resistor 6, a good conductor 8 made of silver paste or the like on the second flat surface 5d, and a resistance A conductive pattern P is formed by providing a connection conductor 9 made of silver paste or the like for connecting the body 6 and the good conductor 8. In addition,
A conductor such as a silver paste connected to the good conductor 7 may be provided on the inner peripheral surface of the through-hole 5a, and the good conductor 7 may be deleted as necessary.

The rotating body 5 is provided with a through hole 5
The shaft part 2b is penetrated through the shaft part 2a, and the tip of the shaft part 2b is caulked, and is rotatably attached to the shaft part 2b. In addition,
Instead of caulking the tip of the shaft 2b, a speed nut (not shown) may be press-fitted to attach the rotating body 5 to the shaft 2b. In a state where the rotating body 5 is attached,
The shoulder portion 2a of the shaft portion 2b is pressed against and contacts the good conductor 7, the contact portion 3b of the contact member 3 contacts the resistor 6, and the contact portion 4b of the contact member 4 contacts the good conductor 8. It will be in the state of having done.

In such a rotary electric component, when a driver is inserted into a driver groove 5g of the rotating body 5 and the rotating body 5 is rotated, the good conductive body 7 is brought into contact with the shaft portion 2b, and the good conductive body 7 is contacted. The body 8 is in sliding contact with the contact member 4 and the resistor 6 is in sliding contact with the contact member 3, so that the terminal portions 3c and 4c
The resistance value between the terminal portion 3c and the terminal 2 is adjusted.
When the stopper 5f of the rotating body 5 hits the stopper 1b of the insulating base 1, the rotation of the rotating body 5 is stopped.

In the above embodiment, the description has been given of the rotary electric component including the variable resistor. However, the present invention can be applied to a rotary electric component such as an encoder using the conductive pattern P as a code pattern or a pulse switch. is there.

[0013]

According to the rotary electric component of the present invention, the rotating body 5 has a first flat surface 5b and a second flat surface 5d formed stepwise by providing a step 5c from the first flat surface 5b. Provided, first
Since the conductive pattern P is provided on each of the flat surface 5b and the second flat surface 5d, the edge surface distance between the conductive patterns P can be increased, and conduction between the conductive patterns P due to migration can be prevented. Rotary electrical components can be provided. Further, by providing the step portion 5c, the space between the conductive patterns P can be narrowed in the radial direction, and a small rotary electric component can be provided. Further, since the stopper portion 5f is formed by providing a convex portion projecting from the second flat surface 5d at the end of the arc-shaped step portion 5c, the stopper is formed within the outer shape of the rotating body 5, that is, within the formation of the conductive pattern P. Configurable,
It is possible to provide a compact rotary electric component having a simple structure. In addition, since the inclined portion 5e is provided in the step portion 5c and the connection conductors 9 formed in the inclined portion 5e connect the conductive patterns P to each other, the connection conductor 9 can be securely attached to the step portion 5c, and the size is reduced. In addition, it is possible to provide a rotary electric component having a good connection state. Further, by forming the rotating body 5 from a ceramic material, heat or a change with time is smaller than that of a conventional synthetic resin, the influence on the conductive pattern P is small, and an accurate electric component can be obtained. This is effective in a variable resistor using the resistor 6. Further, the contact member 3 is attached to the insulating base 1.
At the same time, the terminal 2 and the shaft portion 2b are integrally formed from a single metal plate and attached to the insulating base 1.
Since the resistor 6 provided on the rotating body 5 is brought into contact with the contact member 3, it is possible to provide a rotary electric component as a variable resistor that is small, has a small number of components, and has good productivity.

[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 side view of the rotary electric component of the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a perspective view of a rotating body according to the rotary electric component of the present invention as viewed from the lower surface.

FIG. 5 is a plan view of a rotating body according to the rotary electric component of the present invention.

FIG. 6 is a bottom view of a rotating body according to the rotary electric component of the present invention.

FIG. 7 is a side view of a rotating body according to the rotary electric component of the present invention.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 6;

FIG. 10 is an explanatory view showing the manufacture of the rotary electric component according to the present invention.

FIG. 11 is a plan view of a conventional rotary electric component.

FIG. 12 is a sectional view of a conventional rotary electric component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating base 1a Recess 1b Stopper part 2 Terminal 2a Shoulder part 2b Shaft part 3 Contact member 3a Base 3b Contact part 3c Terminal part 4 Contact member 4a Base 4b Contact part 4c Terminal part 5 Rotating body 5a Through hole 5b First flat surface 5c Step portion 5d Second flat surface 5e Inclined portion 5f Stopper portion 5g Driver groove 6 Resistor 7 Good conductor 8 Good conductor 9 Connection conductor P Conductive pattern

Claims (5)

[Claims] A rotating body made of an insulating material rotatably attached to an insulating base, and a first flat surface and a step portion provided from the first flat surface are provided on one surface side of the rotating body. A rotary electric component, wherein a second flat surface formed on the first flat surface is provided, and a conductive pattern is formed on each of the first and second flat surfaces. 2. The method according to claim 1, wherein the step forming the second flat surface is formed in an arc shape, and the second end is formed at an end of the step in the arc shape.
2. The rotary electric component according to claim 1, wherein a stopper portion is formed by providing a projection projecting from a flat surface. 3. A stepped portion formed between the first flat surface and the second flat surface is provided with an inclined portion, and a connection conductor is provided on the inclined portion to provide the first and second portions. 3. The rotary electric component according to claim 1, wherein a conductive pattern formed on a flat surface is connected. 4. The rotary electric component according to claim 1, wherein said rotary body is formed of a ceramic material. 5. A contact member held by the insulating base,
A terminal provided with a shaft held by the insulating base,
5. A variable resistance value according to claim 1, wherein a part of the conductive pattern is formed of at least a resistor, and the contact member is brought into contact with the conductive pattern to obtain a variable resistance value. The described rotary electrical component.