JP5630768B2 - Rotation type sensor - Google Patents

Description

  The present invention relates to a two-output rotary sensor, and more particularly to a rotary sensor that can reduce the relative error of two outputs.

  For example, in automobiles and motorcycles, improvement of environmental performance has become an issue in recent years. In particular, in automobiles and motorcycles that use an internal combustion engine (engine) as power, improvement of fuel efficiency and reduction of nitrogen oxide emissions are cited as issues. As one means for improving fuel efficiency and reducing nitrogen oxide emissions, the opening and closing angles of engine intake valves, exhaust valves, and the like are being finely controlled in accordance with driving conditions. The rotary sensor is used to detect such an opening / closing angle and a rotation angle.

  In recent years, in automobiles and motorcycles that are further required to have environmental performance, it is necessary to control various valves in more detail. Therefore, a rotary sensor with higher output accuracy is required.

  As a rotary sensor, a rotary sensor described in Patent Document 1 below is known. Hereinafter, the rotation type sensor described in Patent Document 1 will be described with reference to FIG. FIG. 7 is a diagram illustrating a positional relationship among the first brush B1, the second brush B2, the first resistor R1, and the second resistor R2 provided in the rotary sensor described in Patent Document 1.

  The rotary sensor described in Patent Document 1 includes a first brush B1, a second brush B2, a first resistor R1, a second resistor R2, a first conductor L1, and a second conductor as shown in FIG. A base BS having a body L2, and a rotation angle depending on a resistance value level at a relative contact position between the first brush B1 and the first resistor R1 and at a relative contact position between the second brush B2 and the second resistor R2. It is a rotation type sensor which outputs the output voltage which changes according to.

  One end of the first brush B1 slides on the first resistor R1, and the other end slides on the first conductor L1. Further, one end of the second brush B2 slides on the second resistor R2, and the other end slides on the second conductor L2.

  One end of the first resistor R1 is connected to the input terminal Ti1, the input voltage V0 is applied, and the other end is connected to the ground terminal Te1 and grounded. The first conductor L1 is connected to the first output terminal To1 and outputs the output voltage v1.

  One end of the second resistor R2 is connected to the input terminal Ti2, the input voltage V0 is applied, and the other end is connected to the ground terminal Te2 and grounded. The second conductor L2 is connected to the second output terminal To2 and outputs the output voltage v2.

  The output voltage v1 and the output voltage v2 are in-phase output voltages, and a position such as a rotation angle is detected by simultaneously sensing the in-phase output voltages.

Japanese Patent Laid-Open No. 5-107003

  However, in reality, deviation from the ideal position occurs due to variations in the dimensions of the component parts and variations in assembly accuracy during product assembly. At this time, since the output voltage v1 and the output voltage v2 deviate from the ideal values, an error occurs between the actual position and the position detected by the rotary sensor. There is a need for a rotary sensor with a smaller error.

  When there is no deviation from the ideal position, the output voltage v1 and the output voltage v2 are ideally the same value. That is, it is ideal that the output mutual error (the difference between v1 and v2) between the output voltage v1 and the output voltage v2 is 0 (V).

  Hereinafter, an output mutual error between the output voltage v1 and the output voltage v2 generated due to the positional deviation will be described. In the description, as shown in FIG. 7, it is assumed that the relative position between the first brush B1 and the first resistor R1 and the relative position between the second brush B2 and the second resistor R2 are in the direction of the arrow Y from the ideal position. A description will be given assuming that the output voltage v1 and the output voltage v2 are each shifted by Z (V) due to the shift by the distance X and the position shift.

  Here, the ideal value of the output voltage v1 at the position shown in FIG. 7 is v1e, the ideal value of the output voltage v2 is v2e, the actual output voltage v1 is v1z, and the actual output voltage v2 is v2z. And

  Although the output voltage v1 and the output voltage v2 are each shifted by Z (V) due to the position shift, the first brush B1 shifts in a direction approaching the input terminal Ti1 to which the input voltage V0 is applied, and thus the actual value of the output voltage v1. v1z is Z (V) higher than the ideal value v1e of the output voltage v1.

  Since the second brush B2 is shifted away from the input terminal Ti1 to which the input voltage V0 is applied, the actual value v2z of the output voltage v2 is Z (V) lower than the ideal value v2e of the output voltage v2.

  That is, the actual output voltage v1 value v1z and the actual output voltage v2 value v2z can be expressed as follows.

  v1z = v1e + Z (V)

  v2z = v2e−Z (V)

  Accordingly, the output mutual error Dv between the output voltage v1 and the output voltage v2 at the position shown in FIG. 7 can be expressed as follows.

  Dv = v1z−v2z = (v1e + Z) − (v2e−Z) = v1e−v2e + 2Z (V)

  Here, when there is no deviation from the ideal position, it is ideal that the output voltage v1 and the output voltage v2 have the same value. Therefore, the ideal value v1e of the output voltage v1 and the ideal value v2e of the output voltage v2. V1e = v2e, and the output mutual error Dv between the output voltage v1 and the output voltage v2 at the position shown in FIG. 7 can be expressed as follows.

  Dv = 2Z (V)

  That is, the output mutual error Dv between the output voltage v1 and the output voltage v2 at the position shown in FIG. 7 appears as the sum of the voltage values in which the output voltage v1 and the output voltage v2 fluctuate due to the positional deviation. When position detection is performed using, it appears as an error between the actual position and the position detected by the rotary sensor.

  In addition, when it deviates in the direction orthogonal to the arrow Y direction, the output voltage v1 and the output voltage v2 do not change.

  The present invention solves the above-described problems, and provides a two-output rotation type sensor having a small output mutual error and high output accuracy.

  The rotary sensor according to claim 1 is electrically connected to each other as a pair of an insulating substrate provided with two resistor patterns and two conductor patterns, and the resistor pattern and the conductor patterns. At least two sliders that are electrically connected to each other, and a rotating substrate that is rotatably disposed to hold the slider, and the slider is connected to the resistor pattern in conjunction with the rotation of the rotating substrate; In the two-output rotation type sensor that slides on the conductor pattern and outputs an output voltage that changes in accordance with the rotation angle of the rotating substrate, the resistor pattern and the conductor pattern are two virtual concentric circles. The resistor pattern is formed on the pattern surface of the insulating substrate along an arc, and the resistor pattern is formed on the inner side of the first concentric circle and the outer side of the concentric circle. of A second resistor pattern formed along an arc, wherein the first resistor pattern and the second resistor pattern are arranged in parallel on one side of the two concentric circles, and the conductor The pattern includes a first conductor pattern formed along a substantially semicircular arc of the inner concentric circle and a second conductor pattern formed along a substantially semicircular arc of the outer concentric circle. The first conductor pattern and the second conductor pattern are arranged in parallel on the other side of the two concentric circles, and a voltage is applied to one end of the first resistor pattern. Connected to the input terminal, one end of the second resistor pattern is connected to a second input terminal to which a voltage is applied, the other end of the first resistor pattern and the second resistor pattern The other end is the ground end that is grounded to ground. One end of the first conductor pattern is connected to a second output terminal from which a second output voltage is output, and one end of the second conductor pattern is output from the first output voltage. Connected to the first output terminal.

  The rotary sensor according to claim 2, wherein the slider includes a first slider and a second slider, and the rotary substrate holds the slider on a slider holding surface. The slider holding surface and the pattern surface face each other, and are arranged so as to be rotatable about the center of a concentric circle formed by the resistor pattern and the conductor pattern, and in conjunction with the rotation of the rotating substrate. The first slider slides on the first resistor pattern and the second conductor pattern, and the second slider moves on the second resistor pattern and the second conductor pattern. It has a feature of sliding on one conductor pattern.

  The rotary sensor according to claim 3, wherein the slider is in contact with the resistor pattern and the conductor pattern and slides to slide, and a reference when the slider is disposed on the rotating substrate. A reference hole to be positioned, and a notch for preventing the slider from rotating after the slider is arranged on the rotating substrate, and the rotating substrate is provided on the slider holding surface. A positioning pin serving as a reference position when the slider is disposed; and a stopper portion for preventing the slider from rotating after the slider is disposed, and the positioning pin is press-fitted into the reference hole. The slider is held on the slider holding surface in a state where the notch is engaged with the stopper, and at this time, the rotation center of the rotating substrate, the positioning pin, the stopper, the notch Part, the reference hole and the sliding end are collinear Is arranged, it has the feature that.

  The rotary sensor according to claim 4 is characterized in that a width dimension of the resistor pattern and a width dimension of the conductor pattern are larger than a width dimension of the sliding end of the slider.

  The rotary sensor according to claim 5, wherein the slider has a holding hole, the rotary substrate has a holding pin on the slider holding surface, and the holding pin is inserted into the holding hole. And holding the slider on the rotating substrate by caulking the holding pin.

  According to the first aspect of the present invention, the first resistor pattern and the second resistor pattern are arranged in parallel on one side, and the first conductor pattern and the second conductor pattern are on the other side. Arranged in parallel, a predetermined voltage is applied to one end of the first resistor pattern and the second resistor pattern in the same direction, and the other end is connected to the ground terminal and grounded. Therefore, even if a built-in misalignment occurs in product assembly and it deviates from the normal arrangement position, the first output voltage and the second output voltage deviate in the direction of generating an equivalent output misalignment, so that two outputs Output mutual error can be reduced, and the output accuracy of the rotary sensor can be improved.

  According to the invention of claim 2, the first slider slides on the first resistor pattern and the second conductor pattern, and the second slider is the first slider. By having a structure that slides on the resistor pattern 2 and the first conductor pattern, the same component can be used for the first slider and the second slider, The production cost can be reduced by reducing the types of parts.

  According to the invention of claim 3, the rotation center of the rotating substrate, the positioning pin, the stopper portion, the notch portion, the reference hole and the sliding end are arranged on the same straight line, so that the sliding with respect to the rotating substrate is performed. It is possible to suppress the displacement of the mounting position of the moving element and the displacement of the contact position between the resistor pattern and the conductor pattern and the sliding end, and further reduce the output mutual error between the two outputs. There is an effect that the output accuracy of the rotary sensor is improved.

  According to the invention of claim 4, by making the width dimension of the resistor pattern and the width dimension of the conductor pattern larger than the width dimension of the sliding end of the slider, the sliding end of the sliding end is temporarily assumed. Even when the mounting position shift occurs in the width direction, the sliding end can be slid without dropping off from the resistor pattern and the conductor pattern, and a more stable output can be obtained. Play.

  According to the invention of claim 5, the holding hole and the holding pin are provided separately from the positioning pin and the reference hole, the holding pin is inserted into the holding hole, and the holding pin is By adopting a structure in which the slider is held on the rotating substrate, it becomes possible to fix the slider without fixing the positioning reference when the slider is fixedly held on the rotating substrate. It has the effect of being stable.

1 is a schematic diagram showing a configuration of a rotary sensor 1. FIG. It is a figure which shows the slider. It is a figure which shows the rotating substrate. FIG. 3 is a view showing a state in which a slider is disposed on a rotary substrate. FIG. 5 is a diagram showing a positional relationship between a first resistor pattern 121, a second conductor pattern 132, and a first slider 141. It is a figure which shows the conventional rotation type sensor. It is a figure which shows another conventional rotation type sensor.

[First Embodiment]
The rotational sensor 1 in the first embodiment will be described below.

  First, the configuration of the rotary sensor 1 in the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic diagram showing the configuration of the rotary sensor 1. 2 is a view showing the slider 14, FIG. 2A is a perspective view showing the slider 14, FIG. 2B is a perspective view showing the base portion 14a, and FIG. FIG. 4 is a perspective view showing an arm portion 14b. FIG. 3 is a view showing the rotary substrate 15, FIG. 3A is a perspective view showing the rotary substrate 15, and FIG. 3B is a perspective view showing the positioning pins 152.

  As shown in FIG. 1, the rotary sensor 1 is a pair of an insulating substrate 11 provided with two resistor patterns 12 and two conductor patterns 13, and a pair of the resistor pattern 12 and the conductor pattern 13. Each of which has at least two sliders 14 that are electrically connected to each other, and a rotating substrate 15 that holds the slider 14 and is rotatably arranged. The slider 14 is interlocked with the rotation of the rotating substrate 15. Slides on the resistor pattern 12 and the conductor pattern 13, and outputs an output voltage that changes according to the rotation angle of the rotating substrate.

  The insulating substrate 11 is made of an insulating synthetic resin material and is formed in a plate shape. The insulating substrate 11 has a pattern surface 111 on which a resistor pattern 12 and a conductor pattern 13 are arranged on one surface.

  The resistor pattern 12 is formed on the pattern surface 111 of the insulating substrate 11 by solidifying a resistance ink containing carbon, and the conductor pattern 13 is solidified by a conductive paste. In addition, the resistance value per unit length is the same in an arbitrary section on the resistor pattern 12.

  As shown in FIG. 1, the resistor pattern 12 and the conductor pattern 13 are formed along two virtual arcs of concentric circles, and the resistor pattern 12 is formed along an arc of a substantially semicircle inside the concentric circles inside. A first resistor pattern 121 and a second resistor pattern 122 formed along a substantially semicircular arc of the concentric circle on the outer side. The body pattern 122 is arranged in parallel on one side of two concentric circles, and the conductor pattern includes a first conductor pattern 131 formed along a substantially semicircular arc of the inner concentric circle and the outer concentric circle. A second conductor pattern 132 formed along a substantially semicircular arc, and the first conductor pattern 131 and the second conductor pattern 132 are arranged in parallel on the other side of the two concentric circles. ing.

  The width dimension of the resistor pattern 12 and the width dimension of the conductor pattern 13 are based on the width dimension of the portion where the slider 14 contacts the resistor pattern 12 and the conductor pattern 13 (sliding end 14e described later). Is also big.

  One end of the first resistor pattern 121 is connected to a first input terminal 171 to which a voltage is applied, and one end of the second resistor pattern 122 is connected to a second input terminal 172 to which a voltage is applied. The other end of the first resistor pattern 121 and the other end of the second resistor pattern 122 are connected to the ground terminal 16 that is grounded.

  One end of the first conductor pattern 131 is connected to the second output terminal 182 from which the second output voltage V2 is output, and one end of the second conductor pattern 132 is output from the first output voltage V1. The first output terminal 181 is connected.

  As shown in FIG. 2A, the slider 14 has a base portion 14a processed from a metal plate and an arm portion 14b processed from a noble metal plate. As shown in FIG. 2B, the base portion 14a has a rectangular shape, and a right-side protruding portion 14c protruding to the front side is formed at a position near the left side from the right end of the base portion 14a. A left projecting portion 14d projecting to the near side is formed at a position closer to the right side from the left end of the portion 14a.

  Further, two holding holes 14h used for holding when the slider 14 is arranged are formed in the vicinity of the center in the left-right direction of the base portion 14a along the left-right direction. A locking portion 14j for locking the arm portion 14b is formed.

  A reference hole 14f that serves as a reference for the mounting position when the slider 14 is disposed is provided near the tip of the right protruding portion 14c. The reference hole 14f protrudes downward from the lower surface by burring and is formed in a cylindrical shape.

  A cutout portion 14g cut out in a rectangular shape is formed at the right end portion of the left protrusion 14d.

  A straight line passing through the center of the reference hole 14f and the center of the notch 14g is parallel to a straight line passing through the centers of the two holding holes 14h.

  As shown in FIG. 2C, the arm portion 14b is formed in a rectangular shape, and a sliding end 14e that slides on the resistor pattern 12 or the conductor pattern 13 is provided at the front end. A fixed end portion 14i that is locked to the base portion 14a is provided at the end on the back side. The sliding end 14e has a tip portion divided into three in the left-right direction, each of the divided tips is bent downward, and the fixed end 14i is bent downward.

  As shown in FIG. 2A, the slider 14 is formed by the arm portion 14b locking the fixed end portion 14i to the locking portion 14j of the base portion 14a. At this time, the sliding end 14e is arranged so as to protrude to the near side with its tip facing downward.

  The slider 14 includes a first slider 141 and a second slider 142 having the same shape.

  As shown in FIG. 3A, the rotary substrate 15 is made of a synthetic resin material and is formed in a substantially disc shape. The rotating substrate 15 has a slider holding surface 151 for holding the slider 14 on one surface, and the positioning pin 152 serving as a reference position when the slider 14 is arranged on the slider holding surface 151. A stopper 153 that prevents the slider 14 from rotating when the slider 14 is disposed, a holding pin 154 that holds the slider 14 on the slider holding surface 151, and the rotary substrate 15 are provided. And a fulcrum portion (rotation center) 155 serving as a rotation center at the time of rotation.

  The fulcrum part 155 is formed in a cylindrical shape protruding perpendicularly to the slider holding surface 151 and is arranged at the center of the slider holding surface 151.

  The positioning pin 152 is disposed at a position away from the distance between the reference hole 14f and the notch portion 14g with respect to the fulcrum portion 155, and is formed in a cylindrical shape protruding perpendicular to the slider holding surface 151. Yes. As shown in FIG. 3B, three rib portions 152a are provided at equal intervals along the protruding direction on the side surface of the positioning pin 152, and the radius of a circle simultaneously in contact with the three rib portions 152a is a reference. It is larger than the radius of the hole 14f.

  The stopper portion 153 is located on a straight line connecting the center point of the positioning pin 152 and the center point of the fulcrum portion 155 at the same distance as the interval between the reference hole 14f and the notch portion 14g with respect to the positioning pin 152. It is arranged and formed in a substantially rectangular parallelepiped shape protruding perpendicularly to the slider holding surface 151.

  The holding pin 154 is arranged on a straight line parallel to a straight line connecting the center point of the positioning pin 152 and the center point of the fulcrum part 155, and is formed in a columnar shape protruding perpendicular to the slider holding surface 151. ing.

  At this time, the positional relationship among the positioning pin 152, the stopper portion 153, and the holding pin 154 is such that the positioning pin 152 corresponds to the reference hole 14f, the stopper portion 153 corresponds to the notch portion 14g, and the holding pin 154 holds. It arrange | positions in the position corresponding to the hole 14h.

  Next, the structure of the rotary sensor according to the present embodiment will be described with reference to FIGS. FIG. 4 is a view showing a state in which the slider 14 is arranged on the rotary substrate 15.

  As shown in FIG. 4, the rotary substrate 15 holds the first slider 141 and the second slider 142 on the slider holding surface 151. Each of the first slider 141 and the second slider 142 presses the positioning pin 152 into the reference hole 14f, engages the notch portion 14g with the stopper portion 153, and sets the holding pin 154 to the holding hole. It is held on the slider holding surface 151 by being inserted into 14h and caulking the holding pins 154.

  The first slider 141 is disposed so that the support portion 155 is between the arm portion 14b and the arm portion 14b and is located at a position close to one of the arm portions 14b. The child 142 is arranged at a position to be pointed with the first slider 141 with the support portion 155 as a symmetric point.

  At this time, the positioning pin 152, the stopper portion 153, the fulcrum portion 155, the notch portion 14g, the reference hole 14f, and the tip of the sliding end 14e are arranged on the same straight line.

  As shown in FIG. 1, the rotary substrate 15 that holds the slider 14 in this way has the slider 14 held on the slider holding surface 151 and the pattern surface 111 of the insulating substrate 11 face each other. The concentric circle formed by the resistor pattern 12 and the conductor pattern 13 is disposed so as to be rotatable about the center of rotation.

  At this time, as shown in FIG. 1, the first slider 141 is in contact with the first resistor pattern 121 and the second conductor pattern 132, and the second slider 142 is the second resistor. The pattern 122 and the first conductor pattern 131 are in contact with each other. Thus, the first resistor pattern 121 and the second conductor pattern 132 are electrically connected by the first slider 141, and the second resistor pattern 122 and the first conductor pattern 131 are Are electrically connected by a second slider 142.

  One end of the first resistor pattern 121 is connected to the first input terminal 171 to which a voltage is applied, and one end of the second resistor pattern 121 is connected to the second input terminal 172 to which a voltage is applied. The other end of the first resistor pattern 121 and the other end of the second resistor pattern 122 are connected to the ground terminal 16 grounded to the ground, and one end of the first conductor pattern 131 is the second end Connected to the second output terminal 182 from which the output voltage V2 is output, one end of the second conductor pattern 132 is connected to the first output terminal 181 from which the first output voltage V1 is output.

  Next, the operation of the rotary sensor according to the present embodiment will be described with reference to FIG. FIG. 5 is a diagram showing the positional relationship between the first resistor pattern 121, the second conductor pattern 132, and the first slider 141. FIG. 5A shows the position of the first slider 141. FIG. 5B is a diagram illustrating the time when the first slider 141 is at the position 1c.

  When the rotating substrate 15 arranged to be rotatable around the support portion 155 is rotated, the slider 14 held by the rotating substrate 15 and in contact with the resistor pattern 12 and the conductor pattern 13 is The first slider 141 slides on the first resistor pattern 121 and the second conductor pattern 132, and the second slider 142 moves on the second resistor pattern 122 and the first resistor pattern 122. It slides on the conductor pattern 131.

  Further, the same voltage is applied to the first input terminal 171 and the second input terminal 172, the first output voltage V1 is output from the first output terminal 181 and the second output terminal. A second output voltage V2 is output from 182 and the output voltage value changes in proportion to the rotation angle of the rotating substrate 15 in accordance with Ohm's law.

  Hereinafter, the first output voltage V1 will be specifically described as an example. In FIGS. 5A and 5B, the first resistor pattern 121 and the second conductor pattern 132 are represented by a linear shape for the sake of brevity. The same can be said when it becomes.

  Here, it is assumed that an input voltage of 10 (V) is always applied to the first input terminal 171 as an input voltage. At this time, the voltage at the first input terminal 171 side end (position 1a) of the first resistor pattern 121 is 10 (V), and the voltage at the ground terminal 16 side end (position 1b) is 0 (V). .

  In a certain state, the first resistor pattern 121, the second conductor pattern 132, and the first slider 141 are in the positional relationship as shown in FIG. 5A, and the first slider 141 is positioned at the position 1a. Suppose that

  Assuming that the first output voltage output from the first output terminal 181 in a certain state is V1a, since the first slider 141 is located at the position 1a, the first output voltage V1a is the first output voltage V1a. It becomes the same value as the voltage at the position 1a of the resistor pattern 121. Therefore, the first output voltage V1a outputs a voltage of 10 (V).

  Next, by operating the rotary substrate 15, the first slider 141 slides on the first resistor pattern 121, and as shown in FIG. 5 (b), the first input terminal 171 side end. And the ground terminal 16 side end to the middle point position (position 1c). (Hereinafter referred to as post-operation state.)

  Assuming that the first output voltage output from the first output terminal 181 in the post-operation state is V1c, the first slider 141 is located at the position 1c, and therefore the first output voltage V1c is the first output voltage V1c. It becomes the same value as the voltage at the position 1c of the resistor pattern 121.

  Here, assuming that the total resistance value of the first resistor pattern 121 is R (Ω) and the current flowing through the first resistor pattern 121 is I (A), the first input terminal 171 always has 10 (V ) Is applied, the following current I always flows through the first resistor pattern 121 in accordance with Ohm's law: V (voltage) = I (current) × R (resistance value). ing.

  I = 10 / R (A)

  Since the position 1b which is the terminal on the ground terminal 16 side is a reference position (0 (Ω) position) of the resistance value, the first resistor pattern 121 at the position 1c which is the middle position of the positions 1a and 1b. The resistance value Rc can be expressed as Rc = R / 2 (Ω).

  Accordingly, the first output voltage V1c at the position 1c is as follows.

  V1c = I * Rc = (10 / R) * (R / 2) = 10/2 = 5 (V)

  Similarly, when the first slider 141 is at a position 1d which is a midpoint position between the positions 1b and 1c, the first output voltage V1d at the position 1d is 2.5 (V), The output voltage V1 of 1 changes in proportion to the amount of movement of the first slider 141 (distance from the position 1b). This means that the first output voltage V <b> 1 changes in proportion to the rotation angle of the rotary substrate 15 when this embodiment is replaced. Further, the second output voltage V2 also changes in proportion to the rotation angle of the rotary substrate 15 on the same principle.

  Thus, by looking at the output voltage, it is possible to know how many times it has been rotated, and it is possible to detect various opening / closing angles and rotation angles.

A specific example of the product state is as shown in FIG. 6, and by rotating the lever L, the rotating substrate 15 (see FIG. 1) housed therein rotates in conjunction.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  In the rotary sensor 1 of the present embodiment, the resistor pattern 12 includes a first resistor pattern 121 formed along a substantially semicircular arc of an inner concentric circle and a first resistor pattern 121 formed along an outer concentric arc. Two resistor patterns 122, the first resistor pattern 121 and the second resistor pattern 122 are arranged in parallel on one side of two concentric circles, and the conductor pattern 13 is an abbreviation of the inner concentric circles. A first conductor pattern 131 formed along a semicircular arc and a second conductor pattern 132 formed along a substantially semicircular arc of the outer concentric circle. The pattern 131 and the second conductor pattern 132 are arranged in parallel on the other side of the two concentric circles, and one end of the first resistor pattern 121 is connected to the first input terminal 171 to which a voltage is applied. The second resistor One end of the turn 122 is connected to a second input terminal 172 to which a voltage is applied, and the other end of the first resistor pattern 121 and the other end of the second resistor pattern 122 are grounded to ground. 16, one end of the first conductor pattern 131 is connected to the second output terminal 182 from which the second output voltage V2 is output, and one end of the second conductor pattern 132 is the first output voltage. The first output terminal 181 from which V1 is output is connected.

  Thereby, the first resistor pattern and the second resistor pattern are arranged in parallel on one side, the first conductor pattern and the second conductor pattern are arranged in parallel on the other side, A predetermined voltage is applied to one end in the same direction of the first resistor pattern and the second resistor pattern, and the other end is connected to the ground terminal and grounded to the ground. Even if a built-in shift occurs in the case of a shift from the normal arrangement position, the first output voltage and the second output voltage shift in the direction in which an equivalent output shift occurs, so that an output mutual error between the two outputs is reduced. It can be reduced, and the output accuracy of the rotary sensor is improved.

  Hereinafter, the reason why the output mutual error between the first output voltage V1 and the second output voltage V2 generated by the positional deviation can be reduced will be described. In the description, as shown in FIG. 1, it is assumed that the relative position between the first slider 141 and the first resistor pattern 121 and the relative relationship between the second slider 142 and the second resistor pattern 122. Description will be made assuming that the position is shifted from the ideal position by the distance T in the direction of arrow S by the distance T, and the first output voltage V1 and the second output voltage V2 are shifted by U (V) due to the position shift.

  Here, the ideal value of the first output voltage V1 at the position shown in FIG. 1 is V1e, the ideal value of the second output voltage V2 is V2e, the actual value of the first output voltage V1 is V1z, Let the actual value of the second output voltage V2 be V2z.

  The first output voltage V1 and the second output voltage V2 are each shifted by U (V) due to the position shift, but the first slider 141 approaches the first input terminal 171 to which the input voltage V0 is applied. Due to the deviation in the direction, the actual value V1z of the first output voltage V1 is U (V) higher than the ideal value V1e of the first output voltage V1.

  Since the second slider 142 also shifts in a direction approaching the second input terminal 172 to which the input voltage V0 is applied, the actual value V2z of the second output voltage V2 is an ideal value of the second output voltage V2. U (V) is higher than V2e.

  That is, the actual value V1z of the first output voltage V1 and the actual value V2z of the second output voltage V2 can be expressed as follows.

  V1z = V1e + U (V)

  V2z = V2e + U (V)

  Therefore, the output mutual error Dv between the first output voltage V1 and the second output voltage V2 at the position shown in FIG. 1 can be expressed as follows.

  Dv = V1z-V2z = (V1e + U)-(V2e + U) = V1e-V2e (V)

  Here, when there is no deviation from the ideal position, it is ideal that the first output voltage V1 and the second output voltage V2 have the same value, so the ideal value V1e of the first output voltage V1. And the ideal value V2e of the second output voltage V2 is V1e = V2e, and the output mutual error Dv between the first output voltage V1 and the second output voltage V2 at the position shown in FIG. I can express.

  Dv = 0 (V)

  In other words, when the first output voltage V1 and the second output voltage V2 fluctuate by U (V) due to positional deviation, the output mutual error Dv increases by 2U (V) due to positional deviation in the conventional example. In this embodiment, it can be said that the output mutual error Dv between the first output voltage V1 and the second output voltage V2 does not change.

  Note that the first output voltage V1 and the second output voltage V2 do not change when they deviate in the direction perpendicular to the arrow Y direction.

  In the rotary sensor 1 of the present embodiment, the slider 14 includes a first slider 141 and a second slider 142, and the rotary substrate 15 is placed on the slider holding surface 151. 14, the slider holding surface 151 and the pattern surface 111 face each other, and are arranged so as to be rotatable about the center of a concentric circle formed by the resistor pattern 12 and the conductor pattern 13. In conjunction with the rotation, the first slider 141 slides on the first resistor pattern 121 and the second conductor pattern 132, and the second slider 142 moves to the second resistor pattern. 122 and the first conductive pattern 131 are configured to slide.

  Accordingly, the first slider 141 slides on the first resistor pattern 121 and the second conductor pattern 132, and the second slider 142 moves to the second resistor pattern 122 and By adopting a structure that slides on the first conductor pattern 131, the same parts can be used for the first slider 141 and the second slider 142, and the types of parts are reduced. As a result, the production cost can be reduced.

  Furthermore, since the resistor pattern 12 and the conductor pattern 13 can be arranged in two concentric circles, the insulating substrate can be made smaller in comparison with the case where the conventional example is arranged in four concentric circles. Thus, the product can be reduced in size.

  Further, in the rotary sensor 1 of the present embodiment, the slider 14 is in contact with the resistor pattern 12 and the conductor pattern 13 to slide, and the slider 14 is disposed on the rotary substrate 15. A reference hole 14f serving as a reference position, and a notch portion 14g for preventing the slider 14 from rotating after the slider 14 is disposed on the rotary substrate 15. The rotary substrate 15 is provided with a slider. A positioning pin 152 serving as a reference position when the slider 14 is arranged on the holding surface 151 and a stopper 153 that prevents the slider 14 from rotating after the slider 14 is arranged are provided. The slider 14 is held on the slider holding surface 151 in a state where the positioning pin 152 is press-fitted into the stopper 14 and the notch 14g is engaged with the stopper 153. At this time, the rotation center of the rotary substrate 15, the positioning pin 152 Stopper part 15 And a structure in which cutout portions 14 g, reference hole 14f and sliding ends 14e are arranged on the same straight line.

  Thereby, the rotation center of the rotating substrate 15, the positioning pin 152, the stopper portion 153, the notch portion 14g, the reference hole 14f, and the sliding end 14e are arranged on the same straight line, so that the slider 14 with respect to the rotating substrate 15 is arranged. It is possible to suppress the displacement of the attachment position and suppress the displacement of the contact position between the resistor pattern 12 and the conductor pattern 13 and the sliding end 14e, and further reduce the output mutual error between the two outputs. There is an effect that the output accuracy of the rotary sensor 1 is improved.

  In the rotary sensor 1 of the present embodiment, the width dimension of the resistor pattern 12 and the width dimension of the conductor pattern 13 are larger than the width dimension of the sliding end 14 e of the slider 14.

  As a result, the width dimension of the resistor pattern 12 and the width dimension of the conductor pattern 13 are made larger than the width dimension of the sliding end 14e of the slider 14, thereby temporarily shifting the attachment position in the width direction of the sliding end 14e. Even when this occurs, the sliding end 14e can be slid from the resistor pattern 12 and the conductor pattern 13 without falling off, so that a more stable output can be obtained.

  Further, in the rotary sensor 1 of the present embodiment, the slider 14 has a holding hole 14h, the rotary substrate 15 has a holding pin 154 on the slider holding surface 151, and holds the holding pin 154. The slider 14 is held on the rotary substrate 15 by being inserted into the holes 14h and caulking the holding pins 154.

  Accordingly, the holding hole 14h and the holding pin 154 are provided in addition to the positioning pin 152 and the reference hole 14f, the holding pin 154 is inserted into the holding hole 14h, and the holding pin 154 is caulked to slide the slider 14. Is configured to be held on the rotary substrate 15, so that it is not necessary to crimp the positioning pin 152, and it is possible to fix the slider 14 without shifting the positioning reference when the slider 14 is fixedly held on the rotary substrate 15. The output accuracy is more stable.

  Further, in the rotary sensor 1 of the present embodiment, three rib portions 152a are provided on the side surface of the positioning pin 152, and the diameter of a circle simultaneously in contact with the three rib portions 152a is larger than that of the reference hole 14f.

  As a result, when the positioning pin 152 is inserted into the reference hole 14f, the rib portion 152a is pressed in while being crushed, so that there is no backlash between the positioning pin 152 and the reference hole 14f, and there is no reference deviation. Since the rib portions 152a crushed into the gaps escape into the spaces between the rib portions 152a, press-fitting can be performed more easily than when the rib portions 152a are not provided.

  Further, the rotary sensor 1 of the present embodiment has a structure in which the tip of the sliding end 14e is divided into three.

  If the tip is not divided, if there is a foreign object on the sliding track of the sliding end 14e, the entire sliding end rides on the foreign object and electrical conduction is likely to be interrupted momentarily. Electrical continuity can be obtained more reliably by contacting at least one of them. Moreover, by dividing into three, it can be set as an appropriate sliding pressure, and it has the effect of reducing the sliding wear of the resistor pattern 12 and the slider 14.

  As described above, the rotary sensor according to the embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications are made without departing from the scope of the invention. It is possible. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.

  (1) In this embodiment, the insulating substrate 11 is made of a synthetic resin material having an insulating property and is formed in a plate shape. The resistor pattern 12 solidifies the resistance ink containing carbon, and the conductor pattern 13 is conductive. However, the present invention is not limited to this. For example, the insulating substrate may be a baked substrate, and the conductor pattern is formed of a metal sheet instead of the conductive paste. May be.

  (2) In this embodiment, the slider 14 is formed of the base portion 14a and the arm portion 14b, but may be integrally formed of the same material. As a result, the number of parts can be reduced and the process cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Rotation type sensor 11 Insulating substrate 111 Pattern surface 12 Resistor pattern 121 1st resistor pattern 122 2nd resistor pattern 13 Conductor pattern 131 1st conductor pattern 132 2nd conductor pattern 14 Slider 141 1st slider 142 2nd slider 14a Base part 14b Arm part 14c Right side protruding part 14d Left side protruding part 14e Sliding end 14f Reference hole 14g Notch part 14h Holding hole 14i Fixed end part 14j Locking Part 15 Rotating board 151 Slider holding surface 152 Positioning pin 152a Rib part 153 Stopper part 154 Holding pin 155 Supporting part 16 Ground terminal 171 First input terminal 172 Second input terminal 181 First output terminal 182 Second Output terminal

Claims (5)

An insulating substrate on which two resistor patterns and two conductor patterns are provided; two sliders that electrically connect the resistor pattern and the conductor pattern in pairs; and the slide A rotating substrate that holds the moving element and is rotatably arranged, and the slider slides on the resistor pattern and the conductor pattern in conjunction with the rotation of the rotating substrate, In a two-output rotation type sensor that outputs an output voltage that changes according to the rotation angle of the rotating substrate,
The resistor pattern and the conductor pattern are formed on the pattern surface of the insulating substrate along two virtual concentric arcs,
The resistor pattern includes a first resistor pattern formed along a substantially semicircular arc of the inner concentric circle and a second resistor pattern formed along a substantially semicircular arc of the outer concentric circle. And the first resistor pattern and the second resistor pattern are arranged in parallel on one side of the two concentric circles,
The conductor pattern includes a first conductor pattern formed along a substantially semicircular arc of the inner concentric circle and a second conductor pattern formed along a substantially semicircular arc of the outer concentric circle. The first conductor pattern and the second conductor pattern are arranged in parallel on the other side of the two concentric circles,
One end of the first resistor pattern is connected to a first input terminal to which a voltage is applied;
One end of the second resistor pattern is connected to a second input terminal to which a voltage is applied;
The other end of the first resistor pattern and the other end of the second resistor pattern are connected to a ground terminal that is grounded.
One end of the first conductor pattern is connected to a second output terminal from which a second output voltage is output,
One end of the second conductor pattern is connected to a first output terminal from which a first output voltage is output,
A two-output rotation type sensor characterized by the above. The slider comprises a first slider and a second slider,
The rotating substrate holds the slider on a slider holding surface, the slider holding surface and the pattern surface face each other, and a center of a concentric circle formed by the resistor pattern and the conductor pattern is formed. It is arranged to be rotatable as the center of rotation,
The first slider slides on the first resistor pattern and the second conductor pattern in conjunction with the rotation of the rotating substrate, and the second slider moves on the first resistor pattern. Sliding on the two resistor patterns and the first conductor pattern,
The two-output rotation type sensor according to claim 1. The slider has a sliding end that comes into contact with and slides on the resistor pattern and the conductor pattern, a reference hole serving as a reference position when the slider is disposed on the rotating substrate, and the rotating substrate. Each having a notch for preventing the slider from rotating after the slider is disposed;
The rotating board has a positioning pin that serves as a reference position when the slider is arranged on the slider holding surface, and a stopper portion that prevents the slider from rotating after the slider is arranged. ,
The slider is held on the slider holding surface in a state where the positioning pin is press-fitted into the reference hole, and the notch is engaged with the stopper.
At this time, the rotation center of the rotating substrate, the positioning pin, the stopper part, the notch part, the reference hole and the sliding end are arranged on the same straight line.
The two-output rotation type sensor according to claim 1 or 2, wherein the two-output rotation type sensor is provided. The width dimension of the resistor pattern and the width dimension of the conductor pattern are larger than the width dimension of the sliding end of the slider,
The two-output rotation type sensor according to any one of claims 1 to 3 , wherein The slider has a holding hole;
The rotating substrate has a holding pin on the slider holding surface,
Inserting the holding pin through the holding hole and caulking the holding pin to hold the slider on the rotating substrate;
The two-output rotation type sensor according to any one of claims 1 to 4 , wherein the two-output rotation type sensor is provided.