JP2000266507A - Rotary sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary sensor which requires no soldered joints, has a simple constitution, and can be manufactured inexpensively with high productivity. SOLUTION: A rotary sensor is constituted in such a manner that the end sections 5a and 6a of first and second electrode Sections 5 and 6 respectively connected to and led out from first and second resistors 3 and 4 are adjacently arranged in parallel with each other and a clip terminal 9 is attached to an insulating substrate 1 in a state where the contacting section 9a of the terminal 9 is elastically brought into contact with the first and second electrode sections 5a and 6a. The soldered joint which is required in the conventional example becomes unnecessary and the constitution of the sensor becomes simple. In addition, the productivity of the sensor is improved and the manufacturing cost of the sensor is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary sensor using a variable resistor used for a vehicle or the like.

[0002]

2. Description of the Related Art In recent years, a rotary variable resistor has been used in a wide range of fields as a system for electrically detecting a position. Referring to FIG. 5, a conventional rotary sensor of this type will be described. On an insulating substrate 21, a common electrode 22 and first and second resistances connected in parallel from one end of the common electrode 22 are provided. Bodies 23 and 24 and the first and second resistors 23 and 24
First and second connected and drawn from respective ends of
Are formed, a first conductor 27 corresponding to the first resistor 23, and a second conductor 28 corresponding to the second resistor 24.

In addition, the terminal 29 is connected to the common electrode section 22 on the insulating substrate 21, and the terminals 30 and 31 are connected to the first and second electrode sections 25 and 26, respectively. Further, in a state where the terminals 32 and 33 are connected to the first and second conductors 27 and 28, respectively, the insulating substrate 2
1 is fixed. The terminals 30 and 31 are connected to the solder 3
4 are connected. Although not shown here, a first slider (not shown) slidingly in contact with the first resistor 23 and the first conductor 27, a second resistor 24 and the second conductor A second slider (not shown) that is in sliding contact with the body 28 is provided with a rotating body (not shown), and the resistance of the first and second resistors 23 and 24 is varied by rotation of the rotating body. Thus, position detection is performed.

When the terminals 30 and 31 are connected by soldering 34, the first and second resistors 23 and 24 are connected to form one resistor, and the first and second resistors 23 and 24 are connected to each other. 2
4 cannot measure the individual resistance values or the output characteristics, etc., and cannot perform the inspection of the individual resistance values or trimming (adjustment of the resistance values and output characteristics by cutting a part of the resistor). . Therefore, before connecting the terminals 30 and 31 with the solder 34, the resistance value and the like are measured, trimming is performed as necessary, and then the connection is made with the solder 34.

[0005]

In a conventional rotary sensor, after trimming, terminals 30 and 31 are soldered.
However, there is a problem that the operation is troublesome, productivity is low, and the cost is high. Further, the first and second electrode portions 25 and 26 of the first and second resistors 23 and 24 require two terminals 30 and 31, which increases the number of parts and the mounting work. There is a problem that the cost increases and the cost increases.

[0006]

As a first means for solving the above-mentioned problems, a common electrode portion and first and second parallel electrodes respectively connected in parallel from the common electrode portion are provided on an insulating substrate. A resistor, and first and second electrode portions connected to and drawn from the first and second resistors, respectively, wherein ends of the first and second electrode portions are adjacent to each other; And the clip terminal is attached to the insulating substrate in a state where the contact portion of the clip terminal is in elastic contact with the first and second electrode portions. Further, as a second solving means, a width obtained by combining end portions of the first and second electrode portions,
The width of the end portion of the common electrode portion was formed to be substantially the same. Further, as a third solution, the first and the second
The end of the electrode portion is disposed near one end of the insulating substrate, and the ends of the first and second electrode portions are disposed obliquely with respect to the one end of the insulating substrate. And

As a fourth solution, a first conductor corresponding to the first resistor is provided on the insulating substrate.
A second conductor corresponding to the second resistor is provided, and the width of each of the ends of the first and second conductors is made substantially the same. The configuration was almost the same. As a fifth solution, a clip terminal that contacts the common electrode portion, a clip terminal that contacts the first and second electrode portions, and a contact with the first and second conductors, respectively. The clip terminals had the same shape.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rotary sensor according to the present invention will be described with reference to FIGS. 1 to 3. The rotary sensor is made of an insulating material such as ceramic and has a plurality of notches 1a at its ends. A common electrode portion (hatched portion) 2 made of silver or the like, first and second resistors 3 and 4 connected in parallel from one end of the common electrode portion 2, First and second electrode portions (hatched portions) 5, 6 made of silver or the like drawn out by being connected from respective ends of the first and second resistors 3, 4
And a first conductor (hatched portion) 7 corresponding to the first resistor 3 and made of silver or the like, and a second conductor 8 made of silver or the like corresponding to the second resistor 4 and made of silver or the like. (Shaded area).

The end 2a of the common electrode 2, the ends 5a and 6a of the first and second electrode portions 5 and 6, and the first and second
The end portions 7a, 8a of the conductors 7, 8 are respectively located corresponding to the cutout portions 1a of the insulating substrate 1, and are disposed near the one end portion 1b of the insulating substrate 1; Second
The end portions 5a, 6a of the electrode portions 5, 6 are arranged side by side adjacent to each other. Further, the width of the end portion 2a of the common electrode portion 2,
The combined width of the ends 5a, 6a of the first and second electrode portions 5, 6, and the ends 7a, 8a of the first and second conductors 7, 8
Are formed with substantially the same width.

The clip terminal 9 made of a metal plate having a spring property is bent and formed in a U-shape, and a contact portion 9a having a spring property is further bent from one end of the contact portion 9a to be connected to the outside. And the upper piece of the contact portion 9a has a plurality of branched structures. And such a clip terminal 9
Are mounted so that the upper and lower portions of the contact portion 9a sandwich the upper and lower portions of the insulating substrate 1 in accordance with the respective cutout portions 1a of the insulating substrate 1, and the upper portion of each contact portion 9a. Comes into contact with the ends 2a, 5a, 6a, 7a, 8a, respectively, and the ends 5a, 6 of the first and second electrode portions 5, 6 respectively.
In a, the connection is made by a contact portion 9a of one clip terminal 9.

Although not shown here, the first
A first slider (not shown) slidingly contacting the resistor 3 and the first conductor 7, and a second slider (not shown) slidingly contacting the second resistor 4 and the second conductor 8. (Not shown) is a rotating body (not shown)
The position detection is performed by changing the resistance values of the first and second resistors 3 and 4 by the rotation of the rotating body.

Before the clip terminals 9 are attached to the first and second electrode portions 5 and 6, measurement of the individual resistance values of the first and second resistors 3 and 4 and change characteristics are performed. Measure and trim as necessary (adjust the resistance value and output characteristics etc. by cutting a part of the resistor), etc.
Attach clip terminal 9. Then, the clip terminal 9
By simply attaching the electrodes 5, the ends 5a and 6a of the first and second electrode portions 5 and 6 can be connected at the same time. In the present embodiment, the electrodes and conductors indicated by oblique lines in the figure are formed to be exposed, but the resistors 3 and 4 may be extended to cover the electrodes and conductors.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, the end portions 5a, 6a of the first and second electrode portions 5, 6 are shown.
Are disposed obliquely with respect to the one end 1b of the insulating substrate 1, so that even if the attachment of the clip terminal 9 is slightly displaced by being inclined with respect to the one end 1b, the ends 5a, 6
a.

[0014]

According to the rotary sensor of the present invention, the first and second resistors 3, 4 are connected to each other and pulled out.
And the end portions 5a, 6a of the second electrode portions 5, 6 are juxtaposed adjacent to each other, and the contact portion 9a of the clip terminal 9 is elastically contacted with the first and second electrode portions 5a, 6a. Since the clip terminal 9 is attached to the insulating substrate 1 in this state, the conventional solder connection is not required, and the rotary sensor can be provided with a simple configuration, good productivity, and low cost. Also, the first
By forming the widths of the end portions 5a and 6a of the second electrode portions 5 and 6 substantially equal to the width of the end portion 2a of the common electrode portion 2, the clip terminals 9 having the same shape can be used. As a result, it is possible to provide a rotary sensor having good assemblability.

Further, the end portions 5 of the first and second electrode portions 5 and 6 are formed.
a and 6a are disposed near one end 1b of the insulating substrate 1, and the ends 5a and 6a of the first and second electrode portions 5 and 6 are disposed obliquely with respect to the one end 1b of the insulating substrate 1. With this arrangement, it is possible to provide a rotary sensor that reliably contacts the ends 5a and 6a even if the attachment of the clip terminal 9 is slightly displaced. Further, a first conductor 7 corresponding to the first resistor 3 and a second conductor 8 corresponding to the second resistor 4 are provided on the insulating substrate 1, and the first and second conductors are provided. Ends 7 of bodies 7, 8
The width of each of the a and 8a is made substantially the same and the width of the end 2a of the common electrode portion 2 is made almost the same. Can be provided. Also, a clip terminal 9 that contacts the common electrode portion 2, a clip terminal 9 that contacts the first and second electrode portions 5, 6, and a clip terminal that contacts each of the first and second conductors 7, 8. By using the same shape, the clip terminals 9 having the same shape can be used, and a rotary sensor having good assemblability can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a rotary sensor according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a plan view of a rotary sensor according to a second embodiment of the present invention.

FIG. 5 is a plan view of a conventional rotary sensor.

[Description of Signs] 1 Insulating substrate 1a Notch 1b One end 2 Common electrode 2a End 3 First resistor 4 Second resistor 5 First electrode 5a End 6 Second electrode 6a End 7 First conductor 7a End 8 Second conductor 8a End 9 Clip terminal 9a Contact 9b Connection

Claims (5)

[Claims] 1. An insulating substrate, comprising: a common electrode portion; first and second resistors respectively connected in parallel from the common electrode portion; and first and second resistors connected to each of the first and second resistors. The first and second electrode portions are provided by pulling out the first and second electrode portions.
The clip terminals were attached to the insulating substrate in a state where the end portions of the electrode portions were arranged side by side adjacent to each other and the contact portions of the clip terminals were in elastic contact with the first and second electrode portions. A rotation type sensor characterized by the above-mentioned. 2. The rotary mold according to claim 1, wherein the width of the end of the first and second electrode portions is substantially equal to the width of the end of the common electrode portion. Sensor. 3. An end portion of the first and second electrode portions is disposed near one end portion of the insulating substrate, and the first and second electrode portions are provided with respect to the one end portion of the insulating substrate. 3. The rotary sensor according to claim 1, wherein an end of the rotary sensor is disposed obliquely. 4. A first conductor corresponding to the first resistor and a second conductor corresponding to the second resistor are provided on the insulating substrate, and the first and second conductors are provided. 3. The rotary sensor according to claim 2, wherein the width of each of the ends of the conductor is substantially the same as the width of the end of the common electrode portion. 5. The clip terminal contacting the common electrode portion, the clip terminal contacting the first and second electrode portions, and the clip terminal contacting each of the first and second conductors, 5. The rotary sensor according to claim 4, wherein the sensors have the same shape.