JP2000311804A - Resister substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain desired displacement-output property that varies continuously and smoothly by setting the shape of a boundary surface between resisters different from each other in resistance value, which are adhered in a specified pattern shape, into a curve. SOLUTION: Two kinds of resistor 3A of low sheet resistance and resistor 3B of high sheet resistance which are different from each other in resistance are placed between two resistor terminals 2. For example, the resistor 3A is formed into a nearly 1/4 circular arc pattern shape, and further the shape of a boundary surface between each of resistors 3A and 3B is set into a curve. When specified voltage is applied to two or more kinds of resistors, which are adhered to a surface of a resistor substrate and different from each other in resistance, through a pair of the resistor terminals 2, a conductive brush is moved on the surface of the resistor substrate from one side to the other side of the resistor terminal 2. At this time, since the shape of the boundary surface between each of resistors, which are adhered to the surface of the resistor substrate and different from each other in resistance, is set into the curve shape, desired displacement-output property that varies continuously and smoothly is obtained without causing an inflexion point in the boundary surface between each of resistors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistor substrate in a sliding resistance type sensor for detecting a displacement amount as a change in resistance value.

[0002]

2. Description of the Related Art Conventionally, many types of sensors are known as sensors for detecting the amount of displacement. In particular, a sliding resistance sensor that detects the amount of displacement as a change in resistance value,
It is generally and widely used for various electric appliances.

FIG. 6 is a plan view schematically showing an example of the structure of a resistor substrate in a conventional sliding resistance type sensor.
Is a cross-sectional view schematically showing the configuration of the resistor substrate of FIG. 6, FIG. 8 is a plan view schematically showing the configuration of another example of the resistor substrate in the conventional sliding resistance sensor, and FIG. FIG. 10 is a cross-sectional view schematically showing the structure of the resistor substrate of FIG. 8, and FIG. 10 is a displacement diagram showing characteristics of a conventional sliding resistance sensor when one type of resistor is attached on the resistor substrate. -Output characteristic diagram, FIG.
Is a displacement-output characteristic diagram showing characteristics when two types of resistors having different resistance values are attached on the resistor substrate of FIG. 10, and FIG. 12 is an ideal displacement-output characteristic of FIG. It is a desired displacement-output characteristic diagram showing characteristics.

[0006] In FIGS. 6 to 12, reference numeral 1 denotes a resistor substrate, and the resistor substrate 1 is formed of a synthetic resin molded body. Reference numeral 2 denotes a resistor terminal made of a conductive material, and two types of low sheet resistance resistors 3A and high sheet resistance resistors 3B having different resistance values are disposed between the two resistor terminals 2. ing. As shown in FIGS. 7 and 9, the resistor terminal 2 and the resistors 3 </ b> A and 3 </ b> B are applied to the synthetic resin molded body as the resistor substrate 1 in an embedded state by a transfer technique, and are integrally formed. . 6 and 7, the resistors 3A and 3B are formed on the surface of the resistor substrate 1 in an exposed state, and in FIGS. 8 and 9, only the resistor 3B is formed on the resistor substrate 1. The resistor 3A is formed on the lower surface of the resistor 3B.

[0005] In the conventional sliding resistance type sensor having the above configuration, the resistor substrate 1 shown in Figs.
A voltage is applied between the resistor terminals 2 formed on the
On the surface of the resistor substrate 1 on which the resistor A and the resistor 3B are attached,
A conductive brush (not shown) is slid from one side of the resistor terminal 2 to the other side. At this time, a displacement-output characteristic as shown in FIG. 11 is obtained as a characteristic indicating the relationship between the output voltage obtained from the brush and the amount of sliding displacement of the brush. The displacement-output characteristics as shown in FIG.
This shows the characteristics when one type of resistor is attached on the resistor substrate 1.

[0006]

As shown in FIGS. 6 to 9, in a resistor substrate 1 in a conventional sliding resistance type sensor, a resistor 3A and a resistor 3B attached to the surface thereof are connected to each other. Are separated by a linear boundary surface. Therefore, as shown in the displacement-output characteristic diagram of FIG. 11, an inflection point occurs at a switching point of the resistor, which is a boundary surface between the resistor 3A and the resistor 3B. as a result,
As shown in the displacement-output characteristics of FIG. 12, there is a problem that it is extremely difficult to obtain an ideal desired displacement-output characteristic that changes continuously and smoothly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Two or more types of resistors having different resistance values are provided on a surface of a resistor substrate in a sliding resistance type sensor in a predetermined pattern shape. And a configuration in which the shape of the boundary surface of each of the attached resistors is set to a curved shape,
Thereby, as a displacement-output characteristic obtained by sliding the conductive brush along the upper surface of each resistor having a different resistance value, the displacement-output characteristic can be continuously generated without generating an inflection point at the boundary surface of each resistor. It is an object of the present invention to provide a resistor substrate capable of easily obtaining a desired displacement-output characteristic that changes smoothly and smoothly.

[0008]

According to a first aspect of the present invention, there is provided a resistor substrate in a sliding resistance type sensor for detecting a displacement amount as a change in a resistance value. It is characterized in that a plurality of types of resistors are attached in a predetermined pattern shape, and a shape of a boundary surface between the attached resistors is set to a curved shape.

According to a second aspect of the present invention, in the resistor substrate according to the first aspect, the resistor substrate includes at least two types of resistors having different resistance values attached to the surface thereof.
One is formed of a single-layer resistor, and the other is formed of two or more layers of resistors applied in a predetermined pattern on the single-layer resistor.

According to a third aspect of the present invention, in the resistor substrate according to the first or second aspect, a pattern shape of two or more types of resistors having different resistance values attached on the resistor substrate is desired. It is characterized in that it is configured to have an arbitrary pattern shape.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A resistor substrate according to the present invention comprises:
On a surface of a resistor substrate in a sliding resistance type sensor that detects a displacement amount as a change in resistance value, two or more types of resistors having different resistance values are attached in a predetermined pattern shape together with a pair of resistor terminals. The configuration is such that the shape of the boundary surface between the attached resistors is set to a curved shape.

In the resistor substrate of the present invention having the above-described structure, a predetermined voltage is applied to two or more types of resistors having different resistance values attached to the surface of the resistor substrate via a pair of resistor terminals. Is applied. In this state, the conductive brush is slid from one side of the resistor terminal to the other side on the surface of the resistor substrate. At this time, a characteristic indicating the relationship between the output voltage obtained from the brush and the amount of sliding displacement of the brush, that is, a displacement-output characteristic is obtained.

In the displacement-output characteristics obtained as described above, the shape of the boundary surface between the resistors having different resistance values attached to the surface of the resistor substrate is set to a curved shape. As shown in the displacement-output characteristics of FIG. 12, the desired displacement-output characteristics that change continuously and smoothly can be easily obtained without generating an inflection point at the boundary surface of each resistor. It is the most suitable when it is applied to the sliding resistance type sensor used in the electric equipment.

[0014]

[Embodiment 1] Hereinafter, embodiments of the present invention will be described. FIG. 1 schematically shows a configuration of a pair of resistor terminals attached to a resistor substrate and two types of resistors having different resistance values in a sliding resistance sensor according to a first embodiment of the present invention. FIG. 2 is a plan view, and FIG. 2 is a displacement showing characteristics of a case where one type of resistor is attached on the resistor substrate of FIG. 1 and a case where two types of resistors having different resistance values are attached. −
FIG. 3 is an explanatory diagram schematically showing a process of manufacturing the resistor substrate of FIG.

In FIGS. 1 and 3, components denoted by the same reference numerals as those in FIGS. 6 to 9 have the same or similar structures. 1 to 3, reference numeral 1 denotes a resistor substrate, and the resistor substrate 1 is formed of a synthetic resin molded body. Reference numeral 2 denotes a resistor terminal made of a conductive material, and two types of low sheet resistance resistors 3A and high sheet resistance resistors 3B having different resistance values are disposed between the two resistor terminals 2. ing. As shown in FIG. 1, the resistor 3A and the resistor 3B are formed in a predetermined pattern shape (for example, the resistor 3A has a substantially 1/4 arc pattern shape), and the resistor 3A and the resistor 3B The shape of the boundary surface is set to a curved shape.

Next, the manufacturing process of the resistor substrate 1 according to the present invention will be described with reference to FIG. (A)
The resistor 3A is printed in a predetermined pattern on the metal foil 4 made of aluminum, iron, stainless steel or the like. (B) The resistor 3B is printed on the metal foil 4 in a predetermined pattern shape. At this time, the shape of the boundary surface between each of the resistors 3A and 3B is set to a curved shape. (C) The resistor terminals 2 for the respective resistors 3A and 3B are printed on the metal foil 4.
(D) A synthetic resin molding process is performed on the metal foil 4 to transfer a printed film of each of the resistors 3A and 3B and each of the resistor terminals 2 to the synthetic resin molded body. (E) The metal foil 4 is peeled off from the synthetic resin molded body to which the print film has been transferred, to form the resistor substrate 1. (F) Assemble the conductive brush 5 on the resistor substrate 1.

According to the resistor substrate 1 of the present invention manufactured as described above, it is possible to realize the resistor substrate 1 having a smooth surface without steps at the boundary between the resistors 3A and 3B. In the resistor substrate 1 configured as described above, an output voltage is obtained by sliding the brush 5 between the electrically effective range (the range in which the brush 5 slides and displaces) L shown in FIG. As shown in the displacement-output characteristic of FIG. 2, when only one type of resistor (for example, resistor 3B) is attached on the resistor substrate 1, the characteristic shown by the output straight line (a) is obtained. When two types of resistors (resistors 3A and 3B) having different resistance values are attached on the resistor substrate 1, a characteristic shown by a desired output curve (b) is obtained.

[0018] Now, at any point x of electrical scoping L shown in FIG. 1, the displacement illustrated in Figure 2 - V ₀ the output voltage output to the linear (A) of the output characteristics, the desired output curve ( the output voltage for b) and V _1. Further, the printing width at the point X of the resistor 3A having the low sheet resistance value R _SA is represented by W
_A, the print width in the x point of the resistor 3B high sheet resistance value R _SB and W _B. At this time, the following equation is established. _{V 1 = V 0 × {R} SA × (W A / W A + W B) + R SB × (W B /
_{W A + W B)} /} R SB based on the above equations, setting the print width W _B of the printing width W _A and the resistor 3B of the resistor 3A. By performing this over the entire electrical effective range L shown in FIG. 1, the pattern shapes of the resistors 3A and 3B can be determined.

FIG. 1 shows a resistor substrate 1 having a structure in which a resistor 3A and a resistor 3B are respectively applied in a single layer state on the resistor substrate 1. On the other hand, as the two or more types of resistors having different resistance values attached to the resistor substrate 1, one is formed by a single-layer resistor (for example, the resistor 3B), and the other is the single-layer resistor. It is also possible to provide the resistor substrate 1 having a configuration formed of two or more layers of resistors (for example, the resistor 3A) adhered in a predetermined pattern shape thereon.

Embodiment 2 FIG. FIG. 4 schematically shows a configuration of a pair of resistor terminals attached on a resistor substrate and two types of resistors having different resistance values in a sliding resistance sensor according to a second embodiment of the present invention. FIG. 5 is a plan view, and FIG. 5 is a displacement-output characteristic diagram showing characteristics when two types of resistors having different resistance values are attached on the resistor substrate of FIG. In FIG. 4, components denoted by the same reference numerals as those in FIG. 1 have the same or similar structures.

In the second embodiment of the present invention shown in FIG.
The difference is that the pattern shapes of the resistor 3A having a low sheet resistance value and the resistor 3B having a high sheet resistance value are formed in a deformed pattern shape as compared with those of the first embodiment shown in FIG. . The resistor 3A shown in FIG. 4 is formed in a substantially half-arc pattern. In the second embodiment, the characteristics when the resistors 3A and 3B having the above-mentioned pattern shape are attached on the resistor substrate 1 are represented by the displacement-
The output characteristic is indicated by an output curve indicated by a solid line. Since the configuration and operation of the second embodiment are the same as those of the first embodiment shown in FIG. 1, the detailed description thereof will be omitted.

[0022]

As described above, according to the resistor substrate of the present invention, two or more types of resistors having different resistance values are provided on the surface of the resistor substrate in the sliding resistance type sensor for detecting the amount of displacement as a change in the resistance value. Are attached in a predetermined pattern shape, and the shape of the boundary surface between the attached resistors is set to a curved shape.

Therefore, in comparison with the resistor substrate in the conventional sliding resistance type sensor of this type, the resistor substrate according to the present invention has different resistance values attached to the surface of the resistor substrate. As a displacement-output characteristic obtained by sliding a conductive brush along the upper surface, a desired displacement-output that continuously and smoothly changes without generating an inflection point at a boundary surface of each resistor. This has an excellent effect that characteristics can be easily obtained.

[Brief description of the drawings]

FIG. 1 schematically shows a configuration of a pair of resistor terminals attached to a resistor substrate and two types of resistors having different resistance values in a sliding resistance sensor according to a first embodiment of the present invention. It is a top view.

FIG. 2 shows displacement-output characteristics showing characteristics of a case where one type of resistor is attached on the resistor substrate of FIG. 1 and a case where two types of resistors having different resistance values are attached. FIG.

3A and 3B are explanatory views schematically showing a manufacturing process of the resistor substrate of FIG. 1; FIG. 3A is a perspective view showing a state when a resistor is printed on a metal foil; FIG. A perspective view showing a state when another resistor is printed thereon, (c) is a perspective view showing a state when a resistor terminal is printed on a metal foil, and (d).
(E) is a perspective view showing a state in which a printed film of each resistor and each resistor terminal is transferred to a synthetic resin molded body on a metal foil.
FIG. 2 is a perspective view showing a state when a resistor substrate is formed by peeling a metal foil from a synthetic resin molded body, and FIG. 2F is a perspective view showing a state when a conductive brush is assembled to the resistor substrate. .

FIG. 4 schematically shows a configuration of a pair of resistor terminals attached to a resistor substrate and two types of resistors having different resistance values in a sliding resistance sensor according to a second embodiment of the present invention. It is a top view.

FIG. 5 is a displacement-output characteristic diagram showing characteristics when two types of resistors having different resistance values are attached on the resistor substrate.

FIG. 6 is a plan view schematically showing a configuration of an example of a resistor substrate in a conventional sliding resistance sensor.

FIG. 7 is a sectional view schematically showing a configuration of the resistor substrate of FIG. 6;

FIG. 8 is a plan view schematically showing a configuration of another example of the resistor substrate in the conventional sliding resistance sensor.

FIG. 9 is a sectional view schematically showing a configuration of the resistor substrate of FIG. 8;

FIG. 10 is a displacement-output characteristic diagram showing characteristics when one type of resistor is attached on a resistor substrate in a conventional sliding resistance sensor.

FIG. 11 is a displacement-output characteristic diagram showing characteristics when two types of resistors having different resistance values are attached on the resistor substrate of FIG.

FIG. 12 is a desired displacement-output characteristic diagram showing ideal characteristics in the displacement-output characteristics of FIG. 11;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 resistor substrate 2 resistor terminal 3A resistor (low sheet resistance) 3B resistor (high sheet resistance) 4 metal foil 5 brush

Claims (3)

[Claims] 1. A sliding resistor for reading a change in a resistance value based on an output voltage obtained by sliding a conductive brush on a resistor substrate having a resistor attached on a surface thereof together with a pair of resistor terminals. In the resistor substrate of the type sensor, the resistor substrate has two or more types of resistors having different resistance values attached on a surface thereof in a predetermined pattern shape, and a shape of a boundary surface of each of the attached resistors is determined. A resistor substrate, wherein the resistor substrate is configured to have a curved shape. 2. The resistor substrate according to claim 1, wherein the resistor substrate is formed of two or more types of resistors having different resistance values attached to the surface, one of which is formed of a single-layer resistor. And a resistor substrate formed of two or more layers of resistors applied in a predetermined pattern on the one-layer resistor. 3. The resistor substrate according to claim 1, wherein a pattern shape of two or more types of resistors having different resistance values attached on the resistor substrate is set to a desired arbitrary pattern shape. A resistor substrate characterized by comprising: