JP3466467B2 - Rotation angle detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning angle detecting device preferably used for detecting a turning angle of a turning shaft,
In particular, for example, the present invention relates to a rotation angle detection device configured to detect an operation amount of an accelerator pedal or the like provided in a vehicle as a rotation angle of a rotor or the like and give hysteresis to the operation force.

[0002]

2. Description of the Related Art Generally, as a turning angle detecting device for detecting a turning angle of a turning shaft, an accelerator operation amount detecting device for detecting an operation amount of an accelerator pedal is known (for example, Japanese Unexamined Patent Publication No. 9- No. 272360).

This type of conventional accelerator operation amount detecting device includes a casing mounted on the vehicle side, a rotary shaft rotatably mounted on the casing, and connected to an accelerator pedal through a wire or the like. It is composed of a return spring for urging the rotating shaft in the returning direction of the accelerator pedal, a sensor unit for detecting the rotating angle of the rotating shaft as an accelerator operation amount, a hysteresis generating mechanism for the accelerator pedal, and the like. .

Here, the return spring is arranged on the outer peripheral side of the rotating shaft via a cylindrical spring holding member or the like. Further, the sensor unit is composed of, for example, a potentiometer, and is provided using a resistor provided on the casing side together with the sensor body and a mounting member such as a brush holder on the rotating shaft side in a state of sliding contact with the resistor. It is composed of a rotating sliding brush and the like.

Further, the hysteresis generating mechanism comprises a sliding plate provided on each of the casing side and the rotating shaft side, and a pressing spring for pressing these sliding plates into sliding contact with each other. When is rotated, the sliding plates slide with each other to give a frictional resistance force to the rotating shaft.

When the driver operates the accelerator pedal, the rotary shaft rotates against the return spring by a rotary angle corresponding to the accelerator operation amount. This allows
The sensor unit detects the rotation angle of the rotation shaft as a change in the resistance value of the resistor. Further, the hysteresis generation mechanism generates hysteresis with respect to the operation force of the accelerator pedal and stabilizes the operation feeling.

[0007]

By the way, in the above-mentioned prior art, since the accelerator operation amount detecting device is provided with the sensor portion and the hysteresis generating mechanism, for example, the sensor body, the resistor, the sliding brush, and the brush holder. And the like, and the hysteresis generation mechanism having two sliding plates, pressure springs, etc., increase the number of parts of the accelerator operation amount detection device, complicating the structure of the entire device and assembling it. There is a problem that the work is troublesome.

Further, since the hysteresis generating mechanism is provided between the casing and the rotating shaft, if the rotating shaft is slightly inclined with respect to the casing due to, for example, dimensional error of the casing, each hysteresis generating mechanism is The sliding plate is liable to cause one-sided contact. Therefore, in the conventional technique, there is a possibility that durability may be deteriorated due to uneven wear of the sliding plate or that hysteresis with respect to the accelerator pedal may become unstable.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can surely reduce the number of parts of the entire apparatus, simplify the structure, and improve the efficiency of assembly work. At the same time, it is an object of the present invention to provide a rotation angle detecting device capable of stably generating hysteresis for a long period of time.

[0010]

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a rotor-side body formed by opening a rotor accommodating chamber, and the rotor accommodating chamber with the rotor accommodating chamber closed. A sensor-side body fixedly provided on the opening side of the side-body, a rotary shaft extending along a predetermined axis between the sensor-side body and the rotor-side body, and positioned inside the rotor accommodating chamber. was provided on the outer peripheral side of the pivoting axis, a rotor which rotates about the axis of the shaft該回pairs to the rotor so as to rotate integrally with said rotor to
In the axial direction of the rotating shaft while the relative rotation is restricted .
A ring plate that is provided on movable with, said Ringupu
A sensor portion located radially inside the rate and provided between the sensor-side body and the rotor to detect a rotation angle when the rotor rotates relative to the sensor-side body; It is provided between the rotor side body and the rotor,
A spring for urging the rotor and the ring plate toward the sensor side body, and a spring on the outside in the radial direction of the sensor section.
It is located between the sensor-side body and the ring plate and is configured to include a hysteresis generator that applies a resistance force between the sensor-side body and the ring plate by the urging force of the spring. .

With this configuration, when the rotor rotates about the rotation axis, the rotation angle can be detected by the sensor portion, and at this time, the urging force of the spring causes a gap between the sensor side body and the ring plate. It is possible to generate a frictional resistance force on the rotor, and to give a hysteresis to an external force or the like that rotates the rotor. Further, for example, when the rotating shaft is tilted slightly with respect to the sensor side body together with the rotor, the ring plate can be displaced so as to be tilted with respect to the axial direction of the rotating shaft, and the entire sliding surface thereof is located on the sensor side. It is possible to keep the state of sliding contact with the body.

Further, according to the invention of claim 2, a male fitting portion is provided on the outer peripheral side of the rotor, and a female fitting portion which is fitted to the male fitting portion is provided on the inner peripheral side of the ring plate. ing.

Thus, the ring plate can be arranged on the outer peripheral side of the rotor via the male fitting portion and the female fitting portion, and in this state, the rotation of the ring plate with respect to the rotor can be restricted and the fitting portion can be restrained. The ring plate can be displaced with respect to the axial direction of the rotating shaft by the clearance therebetween.

Further, in the invention of claim 3, the rotor has a body portion located in the rotor accommodating chamber in which the spring is disposed on the outer peripheral side, and a portion radially protruding from the body portion,
A flange portion that is urged toward the sensor side body by the spring, and a plate attachment portion that is provided on the axially opposite side of the body portion with the collar portion interposed therebetween and that the ring plate is attached. ing.

Thus, the spring can be arranged on the body of the rotor, and the ring plate can be mounted on the plate mounting portion. Then, the ring plate can be brought into sliding contact with the sensor side body via the flange portion of the rotor by the urging force of the spring.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a rotation angle detecting device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7 by taking an accelerator operation amount detecting device for an automobile or the like as an example.

Reference numeral 1 denotes an accelerator device provided in a vehicle such as an automobile. The accelerator device 1 includes a mounting bracket 3 mounted on a vehicle body 2 and a connecting pin 4 at an intermediate portion in the longitudinal direction. 3, a pedal stay 5 rotatably attached to the upper end side of which engages with a turning lever 13 via a roller 14 described later, an accelerator pedal 6 fixed to the lower end side of the pedal stay 5, and a mounting bracket 3 It is composed of an accelerator operation amount detection device 8 and the like which will be described later and is fixed to the shaft via bolts 7 and the like.

Then, the driver of the vehicle operates the accelerator pedal 6
When the pedal is depressed in the direction of arrow A in FIG. 1, the rotation lever 13 is moved by the upper end of the pedal stay 5 as indicated by arrow B.
The rotation angle of the rotation shaft 12 is detected by the accelerator operation amount detection device 8 as the operation amount of the accelerator pedal 6 (accelerator operation amount).

Reference numeral 8 denotes an accelerator operation amount detecting device as a rotation angle detecting device according to the present embodiment. The accelerator operation amount detecting device 8 is, as shown in FIGS. The side body 11, the rotating shaft 12, the rotor 15, the ring plate 16, the sensor portion 17, the return spring 20, the hysteresis generating portion 21, and the like are included.

Reference numeral 9 denotes a rotor-side body formed of, for example, a resin material in a bottomed cylindrical shape.
Is composed of a tubular portion 9A, a bottom portion 9B, etc., and a rotor accommodating chamber 10 is formed therein with an opening. Further, a bottom portion 9B of the rotor-side body 9 is formed with a tubular support portion 9C that supports the rotating shaft 12, and a spring holding cylinder 9D in which a return spring 20 is arranged on the outer peripheral side.

Reference numeral 11 denotes a resin-made sensor-side body fixedly provided to the cylindrical portion 9A of the rotor-side body 9. The sensor-side body 11 is, as shown in FIGS. 2 and 3, an opening side of the cylindrical portion 9A. And a lid 11A having a substantially disc shape for closing the
A support portion 11B for the rotating shaft 12 provided in the center of A in the form of a bottomed cylinder and a sensor portion 17 are surrounded from the outside in the radial direction , and protrude into the rotor housing chamber 10 from the outer peripheral side of the lid portion 11A. An annular sliding protrusion 11C fitted in the tubular portion 9A of the rotor-side body 9 and a connector 19 described later and the like are included. Further, the lid 11A is, for example, caulked, welded,
The outer peripheral side of the sliding protrusion 11C is fixed to the opening side of the cylindrical portion 9A over the entire circumference by a fixing means such as adhesion.

Reference numeral 12 denotes a metal rotating shaft that extends in the rotor housing chamber 10 in the axial direction. As shown in FIG. 2, the rotating shaft 12 has a support portion 9C of the rotor side body 9 on one side in the axial direction. It is rotatably supported, and the other end is rotatably supported by the support portion 11B of the sensor side body 11. The rotating shaft 12 rotates integrally with the rotor 15 about the axis O-O. Further, one end of the rotating shaft 12 projects outside the rotor-side body 9, and a rotating lever 13 is fixed to the protruding end side together with the roller 14 in a rotation stop state.

Reference numeral 15 denotes a resin rotor rotatably housed in the rotor housing chamber 10. The rotor 15 is a circle fixed to the outer peripheral side of the rotating shaft 12 as shown in FIGS. 2 and 5. A columnar body portion 15A, an annular flange portion 15B radially protruding from the outer periphery of the other end side of the body portion 15A, and a body portion 15A which is provided on the opposite side in the axial direction with the flange portion 15B interposed therebetween. It is configured by integrally forming a lid portion 11A of the side body 11 and a plate attachment portion 15C and the like arranged facing each other.

A return spring 20 is mounted inside the rotor chamber 10 on the outer peripheral side of the body portion 15A. Further, the plate mounting portion 15C is formed in a short cylindrical shape, and a male spline groove 15D as a male fitting portion extending in the axial direction is formed on the outer peripheral side thereof.

Reference numeral 16 is a plate mounting portion 15C of the rotor 15.
A ring plate attached to the ring plate 1
As shown in FIG. 5, 6 is formed as an annular plate from a metal material such as an iron material and a stainless material, and the other side surface in the axial direction is a sliding surface 16A for the sliding protrusion 11C of the sensor side body 11. Further, a female spline groove 16B as a female fitting portion is formed on the inner peripheral side of the ring plate 16.

Here, the ring plate 16 is mounted on the outer peripheral side of the plate mounting portion 15C in such a state that the female spline groove 16B meshes with the male spline groove 15D of the rotor 15. A constant gap is formed between the female spline groove 16B and the male spline groove 15D in the circumferential direction and the radial direction, and the gap is provided between the rotor 15 and the ring plate 16 in the circumferential direction and the radial direction. Giving play.

As a result, the ring plate 16 can be displaced with a degree of freedom so that the axis of the ring plate 16 is inclined with respect to the axis O--O of the rotary shaft 12, and the relative rotation with respect to the rotor 15 is restricted. Further, the ring plate 16 is
One side surface in the axial direction abuts on the flange portion 15B of the rotor 15, and in this state, the sliding surface 16A slides over the entire circumference on the tip side of the sliding protrusion 11C of the sensor side body 11 by the urging force of the return spring 20. Touching.

Reference numeral 17 denotes a sensor portion including a potentiometer or the like provided between the rotor 15 and the sensor side body 11. The sensor portion 17 is a lid portion 11A of the sensor side body 11 as shown in FIGS. A resistor 17B that is provided on the substrate 17A via a substrate 17A and extends in the rotation direction of the rotor 15.
And a conductive sliding brush 17C and the like fixed to the end surface side of the plate mounting portion 15C of the rotor 15, and the resistor 17B is connected to the connector 1 via the bonding wire 18 and the like.
9 terminals 19A.

When the rotor 15 rotates,
At the position corresponding to the rotation angle, the sliding brush 17C moves the resistor 1
By sliding with respect to 7B, the sensor unit 17 detects the change in the resistance value of the resistor 17B on the connector 19 side as the rotation angle of the rotor 15.

Reference numeral 20 is a return spring composed of a coil spring or the like.
2, is disposed between the bottom portion 9B of the rotor-side body 9 and the flange portion 15B of the rotor 15, and the flange portion 15B
The ring plate 16 is urged in the axial direction toward the sensor side body 11 via, and the rotor 15 is urged in the direction opposite to the arrow B direction in FIG.

Reference numeral 21 denotes a hysteresis generating portion provided between the rotor side body 9 and the ring plate 16, and the hysteresis generating portion 21 has a sliding protrusion 11C on the sensor side body 11 and a ring as shown in FIG. It is composed of the sliding surface 16A of the plate 16. The hysteresis generating section 21 applies a frictional resistance force in the rotating direction of the rotor 15 by the urging force of the return spring 20 to generate a hysteresis with respect to the operating force of the accelerator pedal 6.

The accelerator device 1 according to the present embodiment has the above-mentioned structure, and its operation will be described below.

First, when the driver depresses the accelerator pedal 6 in FIG. 1, when the pedal stay 5 is rotated about the connecting pin 4 in the direction of arrow A, the rotating lever 13 is moved to the return spring 20. Rotate in the direction of arrow B against. As a result, in FIG. 2, the rotation shaft 12 of the accelerator operation amount detection device 8 rotates together with the rotor 15, and the rotation angle is detected by the sensor unit 17 as the accelerator operation amount.

Further, when the driver releases the operation of the accelerator pedal 6, the rotating lever 13 is rotated in the direction opposite to the arrow B direction by the urging force of the return spring 20, and the pedal stay 5 is moved together with the accelerator pedal 6. It rotates in the direction opposite to the arrow A direction.

Further, when the rotor 15 of the accelerator operation amount detecting device 8 rotates, the ring plate 16 rotates together with the rotor 15 in a state where the relative rotation is restricted, and the sliding surface 16A thereof has an urging force of the return spring 20. It slides on the sliding protrusion 11C of the sensor side body 11. As a result, a frictional resistance force acting in the rotational direction is generated between the ring plate 16 and the sensor side body 11, and this frictional resistance force causes hysteresis in the operation force of the accelerator pedal 6 via the rotating shaft 12 and the like. Let

Here, when the rotating shaft 12 is displaced so as to be tilted due to, for example, dimensional error of the rotor side body 9 and the sensor side body 11, the ring plate 16 rotates as shown in FIG. The axis O-O of the moving shaft 12 (the rotor 1
5) It is displaced with a degree of freedom so as to be inclined with respect to 5), and a part of it is separated from the flange portion 15B of the rotor 15 with a gap S. As a result, the ring plate 16 compensates for the inclination of the rotating shaft 12, and the sliding surface 16A always maintains the state of sliding contact with the sliding protrusion 11C of the sensor side body 11 over the entire circumference, and the contact state thereof. Are substantially uniformed over the entire sliding surface 16A.

On the other hand, temporarily, the resistor 17B of the sensor unit 17
When the sliding brush 17C and the sliding brush 17C recede due to wear, the sliding protrusions 11C and the like of the sensor side body 11 are also worn in a similar manner, and the rotor 15 is directed toward the sensor side body 11 by the urging force of the return spring 20. Displace slightly. As a result, the resistor 17B of the sensor unit 17 and the sliding brush 17C relatively come close to each other by the amount of the dimension which is worn and retracted, and the contact state (pressure) between them is the return spring 2.
It is held almost constant by 0.

Thus, in the present embodiment, the accelerator operation amount detecting device 8 includes the rotor side body 9, the sensor side body 11, the rotating shaft 12, the rotor 15, the ring plate 16,
Since the sensor unit 17, the return spring 20, the hysteresis generation unit 21, and the like are used, the sensor unit 17 and the hysteresis generation unit 21 can be arranged between the sensor-side body 11 and the rotor 15. The sensor-side body 11 and the rotor 15 can share some of the components related to the generation mechanism, and the return spring 2 also serves as a pressing spring of the hysteresis generation mechanism.
It can also be used as 0.

As a result, the number of parts of the entire device can be surely reduced, the structure thereof can be simplified, and the assembling work of the accelerator device 1 and the accelerator operation amount detecting device 8 can be efficiently performed.

The plate mounting portion 15C of the rotor 15
Male spline groove 15D and female spline groove 16 on the outer peripheral side of
Since the ring plate 16 is provided via B and the sliding surface 16A of the ring plate 16 is brought into sliding contact with the sliding protrusion 11C of the sensor side body 11 by the urging force of the return spring 20, the ring plate 16 is Rotation axis 1
2 can be freely displaced so as to be tilted with respect to the axis line OO, and the ring plate 16 can be rotated with respect to the rotor 15.
Can be restricted from rotating arbitrarily.

As a result, even if the rotary shaft 12 is slightly displaced from the sensor-side body 11 and the like, the ring plate 16 is tilted with respect to the rotor 15 by the urging force of the return spring 20. Can be displaced to compensate for the tilt of the rotating shaft 12, and in this state the ring plate 16 can be moved to the rotor 15
Can be rotated integrally with.

As a result, the sliding surface 1 of the ring plate 16
The state in which 6A is in sliding contact with the sliding protrusion 11C of the sensor-side body 11 over the entire circumference can always be maintained, and the contact state (pressure) can be made substantially uniform over the entire sliding surface 16A. Then, partial contact between the sensor-side body 11 and the ring plate 16 and uneven wear can be reliably prevented, and the frictional resistance force generated between them can be stabilized.

Therefore, the hysteresis generating section 21 can provide a stable hysteresis to the operating force of the accelerator pedal 6 for a long period of time, and the durability and reliability of the accelerator operation amount detecting device 8 can be improved.

Further, since the return springs 20 are arranged on the outer peripheral side of the spring holding cylinder 9D of the rotor side body 9 and on the outer peripheral side of the body portion 15A of the rotor 15, the return spring 20 is securely bent and displaced. Therefore, the spring holding member and the like of the prior art can be omitted.

Further, the lid portion 11A of the sensor side body 11
Since the sensor unit 17 is disposed between the rotor 15 and the plate mounting portion 15C of the rotor 15 at a position surrounded by the sliding protrusion 11C from the outside in the radial direction , the sensor unit 17 and the hysteresis generating unit 21 are disposed in the radial direction. Thus , the accelerator operation amount detecting device 8 can be reliably reduced in size in the axial direction.

Further, since the urging force of the return spring 20 is also applied to the sensor portion 17, even if the resistor 17B and the sliding brush 17C of the sensor portion 17 are worn and retracted, they are applied to the sensor side. The sliding protrusions 11C of the body 11 and the like can be used to make them relatively close to each other. As a result, the contact pressure between the resistor 17B and the sliding brush 17C can be maintained at a substantially constant value by the return spring 20, and the detection operation of the sensor unit 17 can be stabilized for a long period of time.

On the other hand, since the sensor side body 11 is provided with the annular sliding protrusion 11C, when the accelerator operation amount detecting device 8 is assembled, the sliding protrusion 11C is fitted into the cylindrical portion 9A of the rotor side body 9. , Sensor side body 1
1 can be accurately positioned with respect to the rotor-side body 9, and it is possible to reliably prevent the resistor 17B of the sensor unit 17 and the sliding brush 17C from being displaced in the radial direction when these are assembled.

In the above embodiment, a male spline groove 15D is provided as a male fitting portion on the outer peripheral side of the rotor 15,
Although the female spline groove 16B is provided on the inner peripheral side of the ring plate 16 as a female fitting portion, the present invention is not limited to this, and as the male fitting portion and the female fitting portion, for example, a key groove, a seal fitting, etc. May be used, and further, the outer peripheral side shape of the rotor 15 and the inner peripheral side shape of the ring plate 16 may be formed in a non-circular shape such as a D shape.

Although the accelerator operation amount detecting device 8 is provided with the contact-type sensor portion 17 including a potentiometer or the like, the present invention is not limited to this. For example, an electromagnetic type using a magnetoresistive element, a hall element or the like. A non-contact type sensor unit may be configured by a pickup or an optical pickup using a photo coupler and the like, and may be provided in the accelerator operation amount detection device 8.

Further, in the above embodiment, the rotating shaft 12
Is configured to be connected to the pedal stay 5 of the accelerator pedal 6 by using the turning lever 13 or the like, but the present invention is not limited to this, and instead of the turning lever 13, for example, a wire drum or the like is provided on the turning shaft 12. The wire drum and the pedal stay 5 may be connected by a wire or the like, and the rotating shaft 12 may be rotated by the wire in accordance with the operation amount of the accelerator pedal 6.

Furthermore, in the above-described embodiment, the case where the rotation angle detecting device is used as the accelerator operation amount detecting device 8 has been described as an example, but the present invention is not limited to this, and the rotation of an arbitrary rotating body is not limited thereto. You may apply to the rotation angle detection apparatus which detects a moving angle.

[0052]

As described above in detail, according to the first aspect of the invention, the rotation angle detecting device is provided with the rotor side body, the sensor side body, the rotation shaft, the rotor, the ring plate, the sensor portion, the spring and the hysteresis generation. Since it is configured by the parts, the number of parts of the entire device can be surely reduced as compared with the conventional technique, the structure thereof can be simplified, and the assembling work can be efficiently performed. Further, even if the rotation shaft is displaced so as to be inclined with respect to the sensor side body or the like, the ring plate can be displaced so as to be inclined with respect to the rotor, and thereby the inclination of the rotation shaft is compensated. be able to. As a result, Sen entire sliding surface of the ring plate
The state of sliding contact with the service side body can be maintained at all times, the contact state can be made almost uniform over the entire sliding surface, and uneven contact between the ring plate and the sensor side body, uneven wear, etc. can be reliably prevented. The frictional resistance force generated between them can be stabilized. Therefore, stable hysteresis can be given to the external force for rotating the rotating shaft for a long period of time, and durability and reliability can be improved. In addition, between the rotor and the sensor side body,
Axial direction with the radius and the hysteresis part facing each other.
Can be installed at almost the same position,
It can be miniaturized.

According to the second aspect of the invention, since the male fitting portion is provided on the outer peripheral side of the rotor and the female fitting portion is provided on the inner peripheral side of the ring plate, the ring plate is used as the rotor. can be displaced to be inclined with respect to, and may be ring plate against the rotor is reliably restricted from being arbitrarily rotated. As a result, the entire sliding surface of the ring plate can be always slidably contacted with the sensor side body, and when the rotor rotates, a stable frictional resistance force can be generated between them.

Further, according to the invention of claim 3, since the rotor is constituted by the body portion, the collar portion and the plate mounting portion, the ring plate is moved to the sensor side body through the collar portion of the rotor by the urging force of the spring. The sliding contact can be surely made, and a stable hysteresis can be generated against an external force or the like for rotating the rotating shaft.

[Brief description of drawings]

FIG. 1 is an external view showing an accelerator device to which an accelerator operation amount detecting device according to an embodiment of the present invention is applied.

FIG. 2 is a vertical cross-sectional view showing an accelerator operation amount detection device according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part in FIG. 2, showing a sensor unit, a hysteresis generation unit, and the like of the accelerator operation amount detection device.

FIG. 4 is an enlarged front view showing a sliding protrusion, a resistor and the like provided on the sensor side body.

FIG. 5 is an exploded perspective view showing a rotor and a ring plate in an enlarged manner.

FIG. 6 is an exploded perspective view showing an accelerator operation amount detection device in an enlarged manner.

FIG. 7 is an enlarged view of a main part as seen from the same position as FIG. 3, showing a state in which the rotary shaft is slightly inclined with respect to the sensor side body and the like.

[Explanation of symbols]

8 Accelerator operation amount detector (rotation angle detector) 9 Rotor side body 10 Rotor chamber 11 Sensor side body 12 rotation axis 15 rotor 15A body 15B collar part 15C plate mounting part 15D Male spline groove (male fitting part) 16 ring plate 16B female spline groove (female fitting part) 17 Sensor section 20 Return Spring (Spring) 21 Hysteresis generator OO axis

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-299874 (JP, A) JP-A-7-305721 (JP, A) Actually published Shou 63-195654 (JP, U) Special Table 4- 504238 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B ⁷ /30-7/30 G01D 5/16 G05G 1/00-25/04 F02D 9/00-11/10

Claims (3)

(57) [Claims] 1. A rotor-side body formed by opening a rotor housing chamber, a sensor-side body fixedly provided on the opening side of the rotor-side body in a state of closing the rotor housing chamber, and the sensor. A rotation shaft extending along a predetermined axis between the side body and the rotor side body, the rotation shaft being located in the rotor accommodating chamber and provided on the outer peripheral side of the rotation shaft, a rotor which rotates about the phase that pair to said rotor so as to rotate integrally with the rotor
For the axial direction of the rotating shaft in a state in which pairs rotation is restricted
Is a movably provided ring plate, and is provided radially inside the ring plate between the sensor side body and the rotor, and when the rotor rotates relative to the sensor side body. A sensor unit for detecting the rotation angle of the rotor, a spring provided between the rotor-side body and the rotor for urging the rotor and the ring plate toward the sensor-side body, and a radially outer side of the sensor unit. Located between the sensor-side body and the ring plate, and a hysteresis generating portion that applies a resistance force between the sensor-side body and the ring plate by the urging force of the spring. Corner detector. 2. The male fitting portion is provided on the outer peripheral side of the rotor, and the female fitting portion that fits with the male fitting portion is provided on the inner peripheral side of the ring plate. Rotation angle detection device. 3. The body of the rotor, wherein the body is located inside the rotor housing chamber and on which the spring is disposed on the outer peripheral side, and the body protrudes radially from the body, and is directed toward the sensor side body by the spring. The urging collar portion and a plate mounting portion that is provided on the axially opposite side of the body portion with the collar portion sandwiched between the plate mounting portion to which the ring plate is mounted. Rotation angle detection device.