JPH11287636A - Structure of steering sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact steering sensor which detects the absolute position of a steering wheel. SOLUTION: A rotary connector device has a stator housing 1, a rotor housing 6 freely rotationally fitted over the stator housing 1, and a flexible cable 5 helically enclosed in a space formed by the housings 1, 6. The stator housing 1 has a first base 13 for installing light emitting and receiving elements 16 or the like on its lower surface. A first sensor board 14 which operates in conjunction with the rotor housing 6 is placed in a position below the first base 13. The first sensor board 14 has reflectors 14b which are journalled to the first bearing part 9d of an attachment 9 locked to the rotor housing 6 and which reflect the light of the light emitting and receiving elements 16. The light emitting and receiving elements 16 and the reflectors 14b are each provided by plural numbers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a steering sensor for detecting a rotation angle of a steering wheel or the like of an automobile with high accuracy.

[0002]

2. Description of the Related Art Conventionally, as this type of steering sensor, there is a technique disclosed in Japanese Utility Model Laid-Open No. 3-84254, for example. Conventional steering sensors are mounted on rotary connector devices such as slip rings and cable reels. The steering sensor has a light emitting element that emits light toward the slit of the sensor board, a light receiving element that detects light from the light emitting element that has passed through the slit, and a number of slits interposed between the light emitting element and the light receiving element. And a case body in which a circuit board and the like are provided.

[0003] In the steering sensor, a transmission type photointerpreter composed of the light emitting element and the light receiving element is installed above and below a slit of a sensor board which rotates together with the steering sensor, and the number of rotations of the slit is counted by a microcomputer. This is for detecting the position of the steering handle.

[0004]

However, in the conventional steering sensor described above, the sensor board is installed on the lower surface of the rotary connector device, and the case body has a vertically long structure. However, there is a problem that the area around the steering wheel becomes large. Further, a steering sensor that detects the movement of the slit with the transmission type photo interpreter and calculates the rotation of the steering handle by a microcomputer is provided when the power is cut off, for example, when the battery is detached from the vehicle body. There is a problem that it becomes impossible to detect.

It is an object of the present invention to provide a compact steering sensor for detecting an absolute position of a steering wheel.

[0006]

In order to achieve the above-mentioned object, according to a first aspect of the present invention, there is provided a stator housing, a rotor housing rotatably inserted into the stator housing, and the rotor housing. A flexible cable housed spirally in a space defined by the housing, wherein the stator housing has a first substrate on which a light-emitting and light-receiving element or the like is provided on a lower surface, and is disposed below the first substrate. This means that a first sensor board interlocking with the rotor housing is arranged at the portion.

According to a second aspect of the present invention, in the first aspect of the present invention, the first substrate has a cutout portion which engages with a positioning projection formed on a lower surface of the stator housing.

[0008] The invention of claim 3 provides the above-mentioned claim 1 or 2
In the invention described in the above, the first sensor board has a reflecting plate that is pivotally supported by a first bearing portion of an attachment that is locked to the rotor housing and that reflects light of the light emitting and receiving element.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the plurality of light emitting and receiving elements and the plurality of reflectors are provided.

[0010] The invention of claim 5 is the above-mentioned claim 1, 2,
In the invention described in 3 or 4, the stator housing includes a side housing that forms a frame, and a bottom housing that fits into the side housing, and the first substrate is integrated with the bottom housing. It is formed in.

According to a sixth aspect of the present invention, in the third aspect, the attachment has a driving gear, the first sensor board has a driven gear, and the driving gear has a driving gear. And the driven gear, the first gear
This is because a transmission gear for rotating the sensor board at a reduced speed is provided.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, the stator housing has, on a lower surface thereof, a shaft portion that penetrates the through hole of the first substrate and supports the transmission gear. The transmission gear includes a large gear meshing with a driving gear formed on the attachment, and a small gear meshing with a driven gear formed on the first sensor board.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the attachment has a second sensor board in which a number of slits are formed, and above the slit of the second sensor board, Either the light emitting element or the light receiving element provided on the first substrate is provided, and the other of the light receiving element or the light emitting element provided on the second substrate is provided below the slit. .

According to a ninth aspect of the present invention, there is provided the third aspect of the present invention,
In the invention described in 6 or 7, the first substrate, the first sensor board, and the attachment are arranged in a storage portion on a lower surface of the stator housing.

In a tenth aspect of the present invention based on the eighth aspect, the second sensor board rotates together with the rotor housing, and the first sensor board is a quarter of the second sensor board. The range below the rotation is defined as the rotation range.

The invention according to claim 11 is a stator housing, a rotor housing rotatably inserted into the stator housing, a flexible cable spirally housed in a space defined by the two housings, and the rotor housing And an attachment that locks the second sensor board. The attachment integrally forms the second sensor board.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, the second sensor board is provided with a second substrate on which a relative light receiving element or a relative light emitting element is mounted at a position facing the slit. The second substrate forms the engaging portion for fixing the connector and engaging with the positioning projection formed on the lower surface of the stator housing.

According to the thirteenth aspect of the present invention, there is provided the method according to the tenth aspect, wherein
In the invention described in 1 or 12, the second substrate is screwed to the base of the combination switch together with the stator housing with screws.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described in detail with reference to FIGS. Reference numeral 1 denotes a stator housing fixed on a base (not shown) of a combination switch of an automobile, for example. The stator housing 1 is configured by combining a side housing 2 and a bottom housing 3 as shown in FIGS. 1, 3 and 5.

The stator housing 1 has a first housing 1a for housing the flexible cable 5 above the bottom housing 3, a first substrate 13, a first sensor board 14, and a second sensor below the bottom housing 3. A second storage portion 1b for storing the attachment 9 having the board 9f is formed. The stator housing 1 is formed by fitting a fitting hole formed in the side housing 2 with a fitting claw formed in the bottom housing 3.
And the bottom housing 3. Note that the side housing 2 and the bottom housing 3 may be integrally formed to form the stator housing 1.

As shown in FIG. 1, the side housing 2 has a cylindrical frame 2 on which the rotor housing 6 is rotatably fitted.
a, a stator portion 2b having a screw hole 2c for inserting and fixing a screw, and a connector installation portion 2d for installing the connectors 15 and 24 are integrally formed. The side housing 2 is fixed on a base (not shown) of the combination switch by inserting set screws 26 and the like into screw holes 2c and 2g formed in the outer peripheral portion.

The bottom housing 3 is a substantially ring-shaped plate member forming the bottom surface of the stator housing 1, and a sliding sheet 4 is disposed on the upper inner bottom surface. The bottom housing 3
Has a shaft portion 3a rotatably fitted in a shaft hole 12a of the transmission gear 12 and a positioning protrusion 3b protruding below the inner bottom surface. On the lower surface of the bottom housing 3, a first substrate 13, a transmission gear 12, a first sensor board 14, and an attachment 9 are arranged as shown in FIG.

The bottom housing 3 and the first substrate 13
May be formed integrally and fitted to the side housing 2. In this case, a sliding sheet 4 described later is always placed on the first substrate 13.

The shaft portion 3a is a shaft rod integrally formed with the bottom housing 3 as shown in FIGS. 1, 3, and 4, and is inserted through the through hole 13a of the first substrate 13 to transmit the transmission gear 1a.
2 The shaft portion 3a may be formed integrally with the bottom housing 3 or may be formed as a separate member.
The shaft portion 3a may have the shaft hole 12a formed in a shaft rod shape, and the shaft portion 3a may be formed in the shaft hole. The positioning projection 3b is a projection that engages with a plurality of cutouts 13b formed on the inner peripheral portion of the first substrate 13 as shown in FIGS.

As shown in FIGS. 3 and 5, when the flexible cable 5 slides in a donut-shaped space formed by the stator housing 1 and the rotor housing 6, the sliding sheet 4 slides. This is a sheet for reducing resistance and preventing generation of abnormal noise, and is formed in a substantially donut shape using, for example, ethylene tetrafluoride resin (PTFE) having excellent lubricity. As the flexible cable 5, for example, a so-called flat cable having a structure in which a conductive wire is sandwiched between resin films is used. As shown in FIG. 1, the flexible cable 5 is housed in a donut-shaped space formed by the stator housing 1 and the rotor housing 6, one end of which is connected to a terminal of the stator housing 1, and the other end is connected to the rotor housing. 6 terminals are electrically connected to each other.

The rotor housing 6 is rotatably inserted into the stator housing 1 as shown in FIG. 1, and is connected to a steering handle (not shown) by a connecting pin 8 to rotate together. The rotor housing 6
Has a claw 6b fitted on the inner peripheral portion 6a of the fitting portion 9a provided on the attachment 9, and a stepped portion 6c abutting on the protruding piece 9b provided on the attachment 9. The cord cover 11 covering the terminal (not shown) connected to the cord 10 is fixed to the rotor housing 6.

The first substrate 13 is screwed to the lower surface of the bottom housing 3 as shown in FIGS. 1 and 4, and constitutes an electric circuit of the steering sensor, for example, a plurality of light emitting / receiving elements 16 for absolute steering angle, One relative light emitting element 17,
And a printed circuit board to which electronic elements such as a flat cable 18 are soldered. The first substrate 13 has a notch 13b for positioning at an inner peripheral portion and an outer peripheral portion.
The first substrate 13 has the flat cable 18 soldered to a lower surface of a projecting portion 13c arranged on a lower surface of the connector installation portion 2d of the side housing 2.

The transmission gear 12 is a gear for transmitting the rotation of the attachment 9 rotating in the same rotation as the steering handle to the first sensor board 14 by reducing the rotation. The transmission gear 12 includes a large gear 12b meshing with a driving gear 9c of the attachment 9 and a small gear 12 meshing with a driven gear 14a of the first sensor board 14, as shown in FIGS.
and c are integrally formed. The transmission gear 12 is attached to the attachment 9 around the shaft 3 a of the bottom housing 3.
One rotation makes two rotations.

The light emitting / receiving element 16 for absolute steering angle is, for example, a photo sensor as shown in FIGS. 6 and 7, and the lower surface of the first substrate 13 facing the reflecting plate 14b of the rotating first sensor board 14. At a desired position.
The light emitting / receiving element 16 for absolute steering angle shown in FIG. 6 is a mini-reflection type photo sensor, and includes a package 16a having two storage sections 16b and 16c, a light emitting element 16d disposed in the storage section 16b, and A light receiving element 16e disposed in the storage portion 16c, a lead 16f connected to the light emitting element 16d, and a lead 16g connected to the light receiving element 16e
And The light emitting element 16d and the light receiving element 16e are:
Sealed with a filler 16h such as an epoxy resin which is provided in the storage sections 16b and 16c and cuts visible light.

The light emitting / receiving element 16 for absolute steering angle shown in FIG.
Is a reflection type photosensor provided with a housing 16n in which mounting holes 16i and 16j for mounting the light emitting element 16k and the light receiving element 16m are provided toward the center of the reflection plate 14b of the first sensor board 14.

As shown in FIGS. 1 and 4, the first sensor board 14 has a driven gear 14a meshed with, for example, the small gear 12c, and a metal reflector plate 14b on the upper surface on the first substrate 13 side. Is a ring-shaped resin plate member integrally formed with the above. Since the transmission gear 12 is interposed between the first sensor board 14 and the attachment 9, the first sensor board 14 rotates 45 ° when the attachment 9 makes one rotation. The first sensor board 14 is provided with a shaft hole 14c at the center thereof, the shaft hole 14c being fitted to the first bearing 9d of the attachment 9. The driven gear 14
“a” is formed by arranging, on the upper surface of the first sensor board 14, a tooth-shaped tooth pattern protruding in a ring shape. The first sensor board 14 and the second sensor board 9f are provided with positioning holes 9h and 14d for positioning the neutral position of the steering handle when the vehicle goes straight.

The reflection plate 14b is formed by, for example, attaching a plurality of mirror-like metal plates or the like to the upper surface of the first sensor board 14 in a plurality of rows. The reflection plate 14b is made of a material that easily reflects light such as silver, stainless steel, or white. The reflection plate 14
“b” may be applied to the rotor housing 6, affixed thereto, or integrally formed as an insert.

The attachment 9 is shown in FIGS.
As shown in the figure, the stator housing 1, the rotor housing 6, and the second sensor board 9 having the slit 9g
f and the first sensor board 14 having the reflection plate 14b. The attachment 9 includes a first bearing 9d and a first bearing 9d at the center of the second sensor board 9f.
A driving gear 9c is provided above the bearing 9d, a second bearing 9e is provided with the shaft hole 3c of the bottom housing 3 above the driving gear 9c, and a claw 6b of the rotor housing 6 is provided above the second bearing 9e. It has a fitting portion 9a that elastically fits and a protruding piece 9b that contacts the step 6c of the rotor housing 6.

As shown in FIG. 1, the second sensor board 9f is made of a metal disc having a large number of slits 9g arranged around the axis of the attachment 9, and is insert-molded into the attachment 9. . Attachment 9
Are the second sensor board 9f, a first bearing 9d made of an oil-impregnated resin, a driving gear 9c, a second bearing 9e, a fitting part 9
a and the projecting piece 9b. The slit 9
g are circularly arranged at equal intervals around the axis of the attachment 9.

As shown in FIG. 1, the connector 15 has an insert-molded terminal 15a soldered to the second substrate 19 and fixed with screws 27. The second substrate 19 includes
The flat cable 18 whose one end is soldered to the first substrate 13 is soldered to the relative light receiving element 20 arranged to face the relative light emitting element 17. The second substrate 19 includes
The engaging portion 19a is engaged with a positioning protrusion 2f formed on the connector installation portion 2d of the side housing 2, and is positioned and fixed at a predetermined position of the stator housing 1. The second substrate 19 is screwed to the base of the combination switch together with the stator housing 1 with screws 26.
Between the relative light emitting element 17 and the relative light receiving element 20,
The slit 9g of the second sensor board 9f that rotates with the steering handle is arranged.

The connector 24 is electrically connected to the other end of the flexible cable 5 as shown in FIG. 1, and is screwed to the connector installation section 2d. The connector 24 is fitted with a mold cover 25 that covers a window 24a in which a portion where the cable is molded can be seen.

The steering sensor of the present invention has an electric circuit as shown in FIG. The steering sensor includes a constant voltage power supply unit 21, a relative steering angle detecting unit 22, and an absolute steering angle detecting unit 23. The constant voltage power supply unit 21 is, for example, 1
The power supply voltage of the battery of 2 (V) is
(V). Relative steering angle detector 22
Is the relative light emitting element 17 and the relative light receiving element 20 described above.
Etc. The absolute steering angle detection unit 23 includes a light emission bias 23.
a, a reflective absolute encoder 23c, and a μCOM serial processor 23c
And so on.

The embodiment of the present invention is configured as described above, and operates as follows. That is, the rotary connector device connects one terminal to, for example, an airbag device (not shown) on the steering handle side, and connects the other terminal to, for example, an airbag controller (not shown) on the vehicle body side. Thus, for example, when a vehicle has a collision accident, the electric signal from the airbag controller is transmitted to the steering pad, for example, the airbag device via the flexible cable 5 of the rotary connector device.
The inflator is ignited to inflate the airbag.

When the vehicle is traveling straight, the rotor housing 6 is in the neutral position, and the neutral position is set to the light emitting element 16d of the light emitting / receiving element 16 for absolute steering angle.
Is reflected by the reflection plate 14b and received by the light receiving element 16e, whereby this state can be detected. Further, the steering angle of the steering wheel is determined by the relative light emitting element 1
The relative light receiving element 20 detects the light received from 7 through the slit 9g of the second sensor board 9f, so that the neutral state can be accurately determined.

When the steering handle is rotated, the rotor housing 6 and the attachment 9 rotate together with the steering handle, and the flexible cable 5 slides. The second sensor board 9f and the slit 9g rotate together with the rotor housing 6. A large number of slits 9g pass between the relative light emitting element 17 and the relative light receiving element 20 so that the relative light receiving element 20 generates a pulse signal proportional to the rotation of the steering handle, and changes the rotation angle of the steering handle. Can be detected.

When the steering handle rotates, the attachment 9 and the driving gear 9c rotate together with the rotor housing 6. The transmission gear 12 in which the small gear 12c meshes with the driving gear 9c rotates around the shaft 3a,
The large gear 12b causes the driven gear 14a to rotate at a reduced speed.

For example, turn the steering wheel to the right 1
When rotated, the driving gear 9c rotates the same in the direction of arrow A,
The transmission gear 12 makes two rotations in the left direction of the arrow B, and rotates the first sensor board 14 by 45 degrees in the right direction of the arrow C. The reflecting plate 14b passes under the light emitting / receiving element 16 for absolute steering angle fixed to the first substrate 13, and the light receiving element 16e generates a pulse signal proportional to the rotation of the steering handle, thereby turning the steering handle. The number and the rotation angle can be detected.

The first bearing 9d, the transmission gear 12,
First sensor board 14 and light emitting / receiving element 16 for absolute steering angle
For example, even if the power supply from the vehicle-mounted battery is cut off and the power is supplied again, the first steering sensor 14 turns the first sensor board 14 a half turn (180 °) with respect to two turns of the steering handle. ), It is possible to absolutely detect whether the steering wheel has rotated left or right once or twice.

Further, the second steering sensor including the second sensor board 9f, the relative light emitting element 17 and the relative light receiving element 20 can accurately and absolutely detect the rotational position of the steering wheel.

[0045]

The present invention has the following effects. The invention according to claim 1 is a rotary connector device including a stator housing, a rotor housing rotatably inserted into the stator housing, and a flexible cable spirally housed in a space defined by the two housings. In the above, the stator housing has a first substrate on which a light emitting and receiving element and the like are installed on a lower surface, and a first sensor board interlocked with the rotor housing is arranged below the first substrate to emit light. The first sensor board and the first board on which the light receiving element and the like are installed are installed on the lower surface of the stator housing by effectively utilizing the space, so that the thickness of the steering sensor can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the first substrate has a cutout portion which engages with a positioning projection formed on a lower surface of the stator housing. In addition, the light-emitting and light-receiving elements installed on the first substrate can be installed at an accurate desired position on the lower surface of the stator housing, so that the accuracy of the steering sensor can be improved.

[0047] The invention of claim 3 is the invention according to claim 1 or 2.
In the invention described in the above, the first sensor board has a reflecting plate that is pivotally supported by a first bearing portion of an attachment engaged with the rotor housing and reflects light of the light emitting and receiving element. One sensor board can be rotatably supported on the attachment locked to the rotor housing 6, and the steering angle of the steering handle can be detected.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the accuracy of the steering sensor can be improved by providing a plurality of the light emitting and receiving elements and the reflecting plate.

The invention according to claim 5 is characterized in that:
In the invention described in 3 or 4, the stator housing includes a side housing that forms a frame, and a bottom housing that fits into the side housing, and the first substrate is integrated with the bottom housing. In this way, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

According to a sixth aspect of the present invention, in the third, fourth, or fifth aspect, the attachment has a driving gear, the first sensor board has a driven gear, and the driving gear has a driving gear. And the driven gear, the first gear
By providing the transmission gear for rotating the sensor board at a reduced speed, the range in which the first sensor board rotates can be reduced and the structure of the reflector can be simplified.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, the stator housing has, on a lower surface thereof, a shaft portion that penetrates the through hole of the first substrate and supports the transmission gear. Since the transmission gear includes a large gear meshing with a driving gear formed on the attachment and a small gear meshing with a driven gear formed on the first sensor board, the transmission gear is installed on the lower surface of the stator housing. By making the reduction gear transmission mechanism thin, the entire steering sensor can be downsized.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the attachment has a second sensor board in which a number of slits are formed, and above the slit of the second sensor board, Either the light emitting element or the light receiving element provided on the first substrate is provided, and the other of the light receiving element or the light emitting element provided on the second substrate is provided below the slit, On the lower surface of the stator housing, a first steering sensor including a first sensor board and a light emitting / receiving element for absolute steering angle, and a second steering sensor including a second sensor board, a relative light emitting element, and a relative light receiving element. By installing two sensors, even if the power is cut off and the power is restored, it is not necessary to adjust the neutral position, and the absolute steering angle of the steering wheel can always be detected accurately. To enable the.

The ninth aspect of the present invention relates to the third aspect,
8. The invention according to claim 6 or 7, wherein the first substrate, the first sensor board, and the attachment are arranged in a storage portion on the lower surface of the stator housing, so that the entire steering sensor is reduced in thickness and the entire periphery of the steering handle is provided. Can be reduced in size.

In a tenth aspect based on the eighth aspect, the second sensor board rotates together with the rotor housing, and the first sensor board is a quarter of the second sensor board. By setting the range below the rotation as the rotation range, it becomes possible to detect the absolute steering angle of the steering wheel by setting the rotation range of the first sensor board linked to the steering wheel to one rotation or less.

According to an eleventh aspect of the present invention, there is provided a stator housing, a rotor housing rotatably inserted into the stator housing, a flexible cable spirally housed in a space defined by both the housings, In the rotary connector device provided with an attachment for locking the second sensor board, the attachment can integrally form the second sensor board, so that the number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

According to a twelfth aspect of the present invention, in the eleventh aspect, the second sensor board is provided with a second substrate on which a relative light receiving element or a relative light emitting element is mounted at a position facing the slit. The second substrate fixes the connector and forms an engagement portion that engages with a positioning projection formed on the lower surface of the stator housing, so that the second substrate and the light receiving element and the like installed on the second substrate are formed. The steering sensor can be accurately installed at a desired position to improve the accuracy of the steering sensor.

According to a thirteenth aspect of the present invention, in the tenth aspect, the first aspect,
In the invention described in 1 or 12, since the second substrate is screwed to the base of the combination switch together with the stator housing with screws, the number of screws and the number of assembling steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is an exploded perspective view having a partial cross section.

FIG. 2 is an enlarged bottom view showing the embodiment of the present invention.

FIG. 3 is a drawing showing an embodiment of the present invention, and is an enlarged vertical sectional view of a stator housing.

FIG. 4 is a drawing showing an embodiment of the present invention and is an enlarged sectional view of a main part.

FIG. 5 is a drawing showing an embodiment of the present invention, and is an enlarged sectional view of a stator housing.

FIG. 6 is a drawing showing an embodiment of the present invention, and is an enlarged perspective view of a light emitting / receiving element for absolute steering angle.

FIG. 7 is a drawing showing another embodiment of the present invention, and is an enlarged sectional view of a light emitting / receiving element for absolute steering angle.

FIG. 8 is a drawing showing an embodiment of the present invention, and is an electric circuit block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator housing 1b 2nd storage part 2 Side housing 2f Positioning protrusion 3 Bottom housing 3a Shaft 3b Positioning protrusion 6 Rotor housing 5 Flexible cable 9 Attachment 9c Drive gear 9d First bearing 9f Second sensor board 9g Slit 12 Transmission gear 12b Large gear 12c Small gear 13 First substrate 13a Through hole 13b Notch 14 First sensor board 14a Follower gear 14b Reflector 15 Connector 16 Absolute steering angle light emitting / receiving element 17 Relative light emitting element 19 Second board 19a Engaging section 20 Relative light receiving element 26 screw

Claims (13)

[Claims] 1. A stator housing (1), a rotor housing (6) rotatably inserted into the stator housing (1), and a spiral formed in a space defined by the two housings (1, 6). With the stored flexible cable (5),
In the rotary connector device provided with the above, the stator housing (1) is provided with a first substrate (13) on which a light emitting and receiving element (16) and the like are installed on a lower surface, and a lower portion of the first substrate (13) is provided. And a first sensor board (14) interlocked with the rotor housing (6). 2. The invention according to claim 1, wherein the first substrate (13) has a notch (13b) that engages with a positioning projection (3b) formed on a lower surface of the stator housing (1). The structure of a steering sensor characterized by the following. 3. The invention according to claim 1, wherein the first sensor board (14) is provided on a first bearing portion (9d) of an attachment (9) which is locked to the rotor housing (6). A structure of a steering sensor, comprising: a reflector (14b) that is pivotally supported and reflects light of the light emitting and receiving element (16). 4. The steering sensor structure according to claim 3, wherein the light emitting / receiving element (16) and the reflector (14b) are plural. 5. The invention according to claim 1, 2, 3, or 4, wherein the stator housing (1) includes a side housing (2) forming a frame and a side housing (2). And a bottom housing (3) to be fitted, wherein the first substrate (13) is formed integrally with the bottom housing (3). 6. The invention according to claim 3, 4 or 5, wherein the attachment (9) has a driving gear (9c), and the first sensor board (14) has a driven gear (14a).
And a transmission gear (12) for reducing and rotating the first sensor board (14) is provided between the driving gear (9c) and the driven gear (14a). The structure of the sensor. 7. The invention according to claim 6, wherein the stator housing (1) has a lower surface through which a through hole (13a) of the first substrate (13) is inserted, and a transmission gear (12) which is pivoted. The transmission gear (12) has a shaft portion (3a) to support, and the transmission gear (12) meshes with a driving gear (9c) formed on the attachment (9).
And a small gear (12c) meshing with a driven gear (14a) formed on the first sensor board (14). 8. The invention according to claim 7, wherein the attachment (9) has a plurality of slits (9g).
The second sensor board (9f) has a second light emitting element (1f) mounted on the first substrate (13) above the slit (9g) of the second sensor board (9f).
7) or one of the light receiving elements (20) is provided;
A structure of a steering sensor, wherein either the light receiving element (20) or the light emitting element (17) provided on the second substrate (19) is arranged below the slit (9g). 9. The invention according to claim 3, 4, 6 or 7, wherein the first substrate (13), the first sensor board (1)
4) and a structure of the steering sensor, wherein the attachment (9) is arranged in the storage portion (1b) on the lower surface of the stator housing (1). 10. The invention according to claim 8, wherein the second sensor board (9f) rotates together with the rotor housing (6), and wherein the first sensor board (1f) rotates.
4) The structure of the steering sensor, wherein the rotation range is a range of one-fourth rotation or less of the second sensor board (9f). 11. A stator housing (1), a rotor housing (6) rotatably inserted in the stator housing (1), and a spiral shape formed in a space defined by the two housings (1, 6). Flexible cable stored (5)
And an attachment (9) engaged with the rotor housing (6), wherein the attachment (9) includes a second sensor board (9).
A structure of a steering sensor, wherein f) is integrally formed. 12. The invention according to claim 11, wherein the second sensor board (9f) has a relative light receiving element (20) or a relative light emitting element (17) mounted at a position facing the slit (9g). Disposing a second substrate (19);
The board (19) fixes the connector (15),
A structure of a steering sensor, wherein an engagement portion (19a) is formed to engage with a positioning projection (2f) formed on a lower surface of a stator housing (1). 13. The invention according to claim 10, 11, or 12, wherein said second substrate (19) is provided in said stator housing (1).
And a screw (26) screwed to the base of the combination switch.