JP4998330B2 - Rotation angle detector - Google Patents

Description

  The present invention relates to a rotation angle detecting device mainly used for detecting a rotation angle of a steering wheel of an automobile.

  In recent years, with the advancement of functions of automobiles, an increasing number of vehicles use various rotation angle detection devices to detect the rotation angle of a steering wheel and perform various types of vehicle control using this rotation angle.

  Such a conventional rotation angle detection device will be described with reference to FIGS.

  FIG. 11 is a cross-sectional view of a conventional rotation angle detection device. In FIG. 11, reference numeral 1 denotes a rotating body in which a spur gear portion 1A is formed on the outer periphery of the side surface, and a pair of engaging portions 1B protrudes from the inner periphery of the central cylindrical portion. Is formed.

  2 is a first detector having a spur gear portion 2A formed on the outer periphery of the side surface, and 3 is a second detector having a spur gear portion 3A having a different number of teeth from the spur gear portion 2A on the outer periphery of the side surface. The spur gear portion 2A of the first detection body 2 meshes with the spur gear portion 1A of the rotating body 1, and the spur gear portion 3A of the second detection body 3 becomes the spur gear portion 2A of the first detection body 2. Meshed.

  In addition, a wiring board (not shown) having a plurality of wiring patterns formed on the front and rear surfaces is arranged substantially in parallel on the front surfaces of the first and second detection bodies 2 and 3. Magnetic detecting elements 5B and 6B are mounted on the opposing surfaces of the magnet 5A mounted at the center of the first detector 2 and the magnet 6A mounted at the center of the second detector 3, respectively. .

  The first detection means 5 is formed by the magnet 5A and the magnetic detection element 5B facing each other, and the second detection means 6 is formed by the magnet 6A and the magnetic detection element 6B. The control means 7 connected to the magnetic detection elements 5B and 6B is formed by electronic parts such as these.

  Furthermore, 8 is a substantially box-shaped case made of an insulating resin. In this case 8, the rotating body 1, the first detecting body 2, and the second detecting body 3 are rotatable, and the wiring board is fixed and held respectively. In addition, a cover (not shown) made of an insulating resin covers the front surface of the case 8.

  A through hole 8A through which a steering shaft (not shown) is inserted is formed at the center of the case 8, and the left and right sides of the case 8 are directed toward the center of the through hole 8A, that is, the rotation center of the rotating body 1. Symmetrically, round and rectangular attachment holes 8B and 8C are formed, and the rotation angle detection device 10 is configured.

  Then, as shown in the exploded perspective view of FIG. 6, the rotation angle detection device 10 configured as described above is disposed behind the steering wheel 11 and attached to the automobile, and the control means 7 is connected to a connector or a lead wire. It is connected to an electronic circuit (not shown) of the vehicle via a (not shown) or the like.

  Reference numeral 12 denotes a rotary connector, and a flexible cable (not shown) is wound around the fixed housing 13 fixed to the vehicle, and the rotation is rotatably mounted at the center of the fixed housing 13. A steering shaft 15 is locked to the inner periphery of the through hole 14 </ b> A of the housing 14.

  Further, the engaging portion 1B of the rotating body 1 is fitted into the pair of cutout portions 14B formed in the rotating housing 14, and the pair of columnar pins 13A formed in the fixed housing 13 is connected to the case 8. The rotation angle detecting device 10 is held by the rotary connector 12 inserted into the mounting holes 8B and 8C and fixed to the vehicle.

  In the above configuration, when the steering wheel 11 is rotated, the rotating housing 14 locked to the steering shaft 15 is rotated, and accordingly, the rotating body 1 in which the engaging portion 1B is engaged with the notch portion 14B is rotated. To do.

  Further, since the first detection body 2 rotates in conjunction with the rotation of the rotating body 1 and the second detection body 3 rotates in conjunction with the first detection body 2, the magnets mounted at the centers thereof 5A and 6A also rotate, and the magnetic detection elements 5B and 6B detect the changing magnetic force of the magnets 5A and 6A as detection signals, but the first detection body 2 and the second detection body 3 have different numbers of teeth. Since the rotational speeds are also different, the data waveforms of the magnetic detection elements 5B and 6B are detection signals with different periods and shifted phases.

  Then, the control means 7 performs a predetermined calculation from the two different detection signals from the first detection body 2 and the second detection body 3 and the number of teeth of each, and the rotation of the rotating body 1, that is, the steering wheel 11. An angle is detected and output to an electronic circuit of the automobile so that various controls of the vehicle are performed.

  When the rotation angle detection device 10 configured as described above is transported and stored and then mounted on the automobile, as described above, the rotation connector 12 having the steering shaft 15 locked in the through hole 14A. The engaging portion 1B of the rotating body 1 is engaged with the cutout portion 14B, and the pin 13A is inserted into the mounting holes 8B and 8C of the case 8 to be mounted. At this time, the rotating portion is rotated during transportation and storage. Since the body 1 may be slightly rotated, it is necessary to perform so-called zero point storage in the control means 7 of the rotation angle detection device 10.

  In other words, the rotation angle of the steering wheel 11 is set to 0 ° at the neutral position, that is, the vehicle is in a straight traveling state, and the rotation angle at this time is stored in the control means 7 as 0 ° at the neutral position. By detecting the rotation angle of the steering wheel 11 with reference to the zero point, it is configured to detect how many times the steering wheel 11 has rotated in the left or right direction.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2006-258625 A

  However, in the above conventional rotation angle detection device, when the rotation angle detection device 10 is mounted on an automobile, it is necessary to store 0 points in the control means 7 with the steering wheel 11 set to 0 ° of the neutral position. For this reason, there is a problem that the assembly work is complicated and time is required.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a rotation angle detection device that can be easily mounted on a vehicle and can reliably detect the rotation angle.

  In order to achieve the above object, the present invention has the following configuration.

According to the first aspect of the present invention, a rotating body provided with a gear portion on the outer periphery of a side surface that rotates in conjunction with a steering wheel, a detecting body that rotates in conjunction with the rotating body, and rotation of the detecting body Detection means, a control means for detecting the rotation angle of the rotating body based on a detection signal from the detection means, and a case in which these are housed and provided with a mounting hole. A release portion is formed at each of the other end portions, and the lock portion and the release portion are integrally provided with a lock body that is held in the case so as to be rotatable or movable along a rotation plane of the rotary body. The locking portion is urged by a spring to elastically contact the gear portion of the rotating body, the release portion protrudes into the mounting hole of the case, and a pin is inserted from the outside into the mounting hole. The release part is pressed by the pin Serial locking part is intended to constitute a rotation angle detection device in the away from the gear unit, performs zero point stored in advance in the control unit, and held at 0 ° neutral position the rotation angle by the securing body Since it can be mounted on the vehicle in the state, it is not necessary to store the zero point in the control means at the time of assembly to the vehicle, and a rotation angle detecting device that can be easily mounted on the vehicle and can reliably detect the rotation angle is obtained. It has the effect of being able to.

According to a second aspect of the present invention, there is provided a rotating body provided with a gear portion on the outer periphery of a side surface that rotates in conjunction with a steering wheel, a cylindrical portion inside the gear portion, and a detecting body that rotates in conjunction with the rotating body. A detecting means for detecting the rotation of the detecting body, a control means for detecting the rotation angle of the rotating body based on a detection signal from the detecting means, and housing them, and having an opening on the side surface and both sides of the opening. It consists of a case provided with a holding part consisting of a protruding part that protrudes outward, and a notch-like engaging part is provided in the cylindrical part of the rotating body, and a locking part is released at one end and released at the other end. Each of which is provided with a locking body that is held by the case so that the locking portion and the releasing portion are integrally rotated and movable along a rotation plane of the rotating body. Energized to elastically contact the engaging part of the rotating body, and the release part By projecting outward from the opening of the case and inserting a rib from the outside into the holding portion of the case, the release portion is pressed by the rib and the locking portion is separated from the engaging portion. In this way, the rotation angle detection device is configured, and 0 point is stored in the control means in advance, and the rotation angle is held at 0 degrees of the neutral position by the locking body, so that it can be mounted on the vehicle. There is no need to store 0 points in the control means when assembling to the vehicle, and there is an effect that a rotation angle detection device that can be easily mounted on the vehicle and can reliably detect the rotation angle can be obtained.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the spring is integrally formed on the locking body, the number of components is reduced, and the rotation angle detection device is formed at low cost. Has the effect of being able to

  As described above, according to the present invention, it is possible to obtain an advantageous effect that a rotation angle detection device that can be easily mounted on a vehicle and can reliably detect the rotation angle can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment 1)
The first and third aspects of the present invention will be described with reference to the first embodiment.

  FIG. 1 is a cross-sectional view of a rotation angle detection device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and in FIG. A gear portion 1A is formed, and a pair of engaging portions 1B are formed to protrude from the inner periphery of the central cylinder portion.

  2 is a first detector having a spur gear portion 2A formed on the outer periphery of the side surface, and 3 is a second detector having a spur gear portion 3A having a different number of teeth from the spur gear portion 2A on the outer periphery of the side surface. The spur gear portion 2A of the first detection body 2 meshes with the spur gear portion 1A of the rotating body 1, and the spur gear portion 3A of the second detection body 3 becomes the spur gear portion 2A of the first detection body 2. Meshed.

  The diameter and the number of teeth of these gears are the largest in the rotating body 1, the first detecting body 2 is smaller than the second detecting body 3, for example, the rotating body 1 has 87 teeth and the first number of teeth. The number of teeth of the detection body 2 is 29, and the number of teeth of the second detection body 3 is 30.

  Reference numeral 20 denotes a wiring board disposed substantially in parallel with the front surfaces of the first and second detection bodies 2 and 3, and a plurality of wiring patterns (not shown) are formed on the front and rear surfaces, and the first detection is performed. Magnetic detection of an AMR (anisotropic magnetoresistive) element or the like is provided on the opposing surface of the magnet 5A attached to the center of the body 2 by insert molding or the like and the magnet 6A attached to the center of the second detector 3. Elements 5B and 6B are respectively mounted.

  The first detection means 5 is formed by the magnet 5A and the magnetic detection element 5B opposed to each other, and the second detection means 6 is formed by the magnet 6A and the magnetic detection element 6B. The control means 21 is formed by electronic parts such as a microcomputer, and the control means 21 is connected to the magnetic detection elements 5B and 6B via a wiring pattern.

  Further, 8 is a substantially box-shaped case made of insulating resin, 22 is a cover made of insulating resin, and the rotating body 1, the first detecting body 2, and the second detecting body 3 rotate in the case 8 and the cover 22. The wiring board 20 is fixed and held, and through holes 8A and 22A through which a steering shaft (not shown) is inserted are formed at the center of these.

  Further, round and rectangular mounting holes 8B and 22B, 8C and 22C are formed on the left and right sides of the case 8 and the cover 22 symmetrically toward the centers of the through holes 8A and 22A, that is, the rotation center of the rotating body 1. Has been.

  Reference numeral 23 is a substantially U-shaped locking body made of insulating resin, 24 is a spring made of steel, copper alloy or the like wound in a coil shape, and the fulcrum 23A in the middle of the locking body 23 rotates to the case 8. The holding portion 23B formed in a gear shape at the lower end is urged by the spring 24 in a slightly bent state and elastically meshes with the spur gear portion 1A on the outer periphery of the rotating body 1, A part of the release portion 23 </ b> C at the upper end protrudes into the attachment hole 8 </ b> B of the case 8, and the rotation angle detection device 30 is configured.

  Then, the rotation angle detection device 30 configured as described above has a rotary connector 12 in which a flexible cable (not shown) is wound around the fixed housing 13 as shown in the exploded perspective view of FIG. At the same time, it is disposed behind the steering wheel 11 and mounted on the automobile. At this time, the control means 21 of the rotation angle detection device 30 has a neutral position as a reference for detecting the rotation angle of 0 degree, so-called 0 point. Memories are already remembered.

  In other words, after the rotation angle detection device 30 is manufactured and subjected to electrical inspection, mechanical inspection, etc., this position is 0 point in the control means 21 in a state where the rotating body 1 is set to 0 degree of the neutral position. Is stored, and the locking portion 23B of the locking body 23 is elastically meshed with the spur gear portion 1A on the outer periphery of the rotating body 1 so that the neutral position does not change, and the rotation angle detection device 30 is transported. And storage.

  Therefore, when the rotation angle detection device 30 is mounted on the vehicle, it is not necessary to store the zero point in the control means 21, and the rotation angle of the steering wheel 11 is set to 0 ° of the neutral position, that is, the vehicle is in a straight traveling state. The assembly work can be performed simply by mounting the rotation angle detection device 30 as it is.

  The control means 21 of the rotation angle detection device 30 is connected to an electronic circuit (not shown) of the vehicle via a connector, a lead wire (not shown) or the like, and is fixed to the vehicle of the rotary connector 12. The engaging portion 1B of the rotating body 1 is fitted into the pair of cutout portions 14B of the rotating housing 14 that is rotatably mounted in the center of the fixed housing 13 and that has the steering shaft 15 locked to the inner periphery of the through hole 14A. Is done.

  A pair of cylindrical pins 13A formed in the fixed housing 13 are inserted into the mounting holes 8B and 8C of the case 8, and the rotation angle detection device 30 is held by the rotary connector 12 fixed to the vehicle. However, at this time, as shown in the cross-sectional view of FIG. 3, the release portion 23C of the locking body 23 protruding into the mounting hole 8B is pressed by the pin 13A inserted into the mounting hole 8B.

  As a result, the locking body 23 rotates about the fulcrum 23A while bending the spring 24, and the locking part 23B is separated from the spur gear portion 1A on the outer periphery of the rotation body 1, so that the rotation body 1 can rotate. It is comprised so that it may become a state.

  In the above configuration, when the steering wheel 11 is rotated, the rotating housing 14 locked to the steering shaft 15 is rotated, and accordingly, the rotating body 1 in which the engaging portion 1B is engaged with the notch portion 14B is rotated. To do.

  Further, since the first detection body 2 rotates in conjunction with the rotation of the rotating body 1 and the second detection body 3 rotates in conjunction with the first detection body 2, the magnets mounted at the centers thereof 5A and 6A also rotate, and the magnetic detection elements 5B and 6B detect the changing magnetic force of the magnets 5A and 6A as detection signals, but the first detection body 2 and the second detection body 3 have different numbers of teeth. Since the rotational speeds are also different, the data waveforms of the magnetic detection elements 5B and 6B are detection signals with different periods and shifted phases.

  Then, the control means 21 performs a predetermined calculation from the two different detection signals from the first detection body 2 and the second detection body 3 and the number of teeth of each, and the rotation of the rotating body 1, that is, the steering wheel 11. An angle is detected and output to an electronic circuit of the automobile so that various controls of the vehicle are performed.

  That is, after the rotation angle detection device 30 is manufactured, the locking portion 23B of the locking body 23 is elastically meshed with the spur gear portion 1A, so that the rotary body 1 is held at the neutral position that is 0 point. Transporting, storage, etc. are performed, but when mounted on the vehicle, the locking portion 23B is separated from the spur gear portion 1A, the rotating body 1 can be rotated, and it is reliable with reference to the zero point stored by the control means 21. It is configured so that a simple rotation angle can be detected.

  That is, when the rotation angle detection device 30 is manufactured, the control means 21 stores 0 points in advance, and can be mounted on the vehicle while the rotation angle is held at 0 degrees of the neutral position by the locking body 23. It is not necessary to store the zero point in the control means 21 at the time of assembling, so that it can be easily mounted on the vehicle and the rotation angle can be reliably detected.

  Further, when the rotation angle detection device 30 is removed from the vehicle when the automobile is repaired, the rotation angle detection device 30 is removed from the rotation connector 12 with the rotation angle of the steering wheel 11 set to 0 ° of the neutral position. If it is removed, the locking body 23 biased by the spring 24 rotates in the direction opposite to that at the time of mounting as described above, and the locking portion 23B elastically meshes with the spur gear portion 1A of the rotating body 1, Removal can be performed in the original neutral position in which a part of the release portion 23C protrudes into the attachment hole 8B of the case 8.

  Therefore, when the repair or the like is completed and the rotation angle detection device 30 is mounted on the vehicle again, as described above, the rotation angle of the steering wheel 11 is set to 0 ° of the neutral position, that is, the vehicle is mounted in a straight traveling state. In this case, it is not necessary to store the zero point in the control means 21, and it can be easily remounted.

  In the above description, the configuration in which the locking body 23 is urged by the spring 24 has been described. However, as shown in the cross-sectional view of FIG. 4, a thin plate-like spring portion 26 </ b> A is provided on the locking body 26 made of insulating resin. If the locking portion 26B is elastically meshed with the spur gear portion 1A of the rotating body 1 and the release portion 26C protrudes into the mounting hole 8B of the case 8, the separate spring is unnecessary. Therefore, the number of components can be reduced, and the rotation angle detection device can be formed at low cost.

  In the above description, the structure for rotating the locking body 23 has been described. However, as shown in the sectional view of FIG. 5, the locking body 27 biased by the spring 24 is provided so as to be slidable in the center direction. Further, the present invention can be implemented by a configuration in which the gear-shaped locking portion 27B at the tip is elastically meshed with the spur gear portion 1A of the rotating body 1 and the inner periphery of the release portion 27C projects into the mounting hole 8B. .

  As described above, according to the present embodiment, the locking body 23 is provided in the case 8 housing the rotating body 1, the control means 21, and the like, and the locking portion 23 </ b> B biased by the spring 24 is provided with the rotating body 1. The release portion 23C protrudes into the mounting hole 8B of the case 8 so that the control means 21 stores 0 points in advance and holds the rotation angle at 0 degrees of the neutral position by making the locking body 23 elastically contact the outer periphery of the case 8. Therefore, it is not necessary to store the zero point in the control means 21 at the time of assembling to the vehicle, the rotation angle detecting device that can be easily mounted on the vehicle and can reliably detect the rotation angle. Can be obtained.

(Embodiment 2)
A second embodiment of the present invention, particularly the invention according to claim 2 will be described.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure of Embodiment 1, and detailed description is abbreviate | omitted.

  FIG. 7 is a cross-sectional view of a rotation angle detection device according to a second embodiment of the present invention, and FIG. 8 is an exploded perspective view thereof. In FIG. A pair of engaging portions 31B are formed on the inner periphery of the cylindrical portion 31C, and the spur gear portion 2A on the outer periphery of the side surface of the first detector 2 meshes with the spur gear portion 31A of the rotating body 31, and the second The spur gear portion 3A on the outer periphery of the side surface of the detection body 3 meshes with the spur gear portion 2A of the first detection body 2, and the first detection body 2 and the second detection body 3 are interlocked with the rotation of the rotation body 31. The rotation of each is the same as in the first embodiment.

  The first detection means 5 is arranged opposite to the magnet 6A of the second detection body 3 by the magnet 5A in the center of the first detection body 2 and the magnetic detection element 5B arranged opposite thereto. The second detection means 6 is formed by the magnetic detection element 6B formed, and the control means 21 determines the rotation angle of the rotating body 31, that is, the steering by two different detection signals from these detection means 5 and 6. The detection of the rotation angle of the wheel 11 is the same as in the first embodiment.

  Further, 38 is a substantially box-shaped case made of insulating resin, and 42 is a cover made of insulating resin. Inside the case 38 and the cover 42, the rotating body 31, the first detector 2, the second detector 3, and The wiring board 40 and the like are each held and accommodated as in the case of the first embodiment. However, openings 38C are formed on the left and right side surfaces of the case 38, and the upper and lower sides of the left and right openings 38C are At predetermined positions in the direction, holding portions 38E are provided by protruding portions 38D protruding outward.

  Furthermore, 43 is a substantially L-shaped locking body, 44 is a spring made of steel, copper alloy, or the like wound in a coil shape. A locking portion 43B that is pivotally supported and protrudes inward from the upper portion of the locking body 43 is formed in a notch-shaped engaging portion 31D provided on the cylindrical portion 31C that is the outer periphery of the rotating body 31. The rotating body 31 is urged and brought into elastic contact with the spring 44 in a slightly bent state, and the rotating body 31 is held at a rotation angle of 0 degree in the neutral position.

  Further, the release portion 43C at the lower portion of the locking body 43 extends to the opening 38C of the case 38 and protrudes outward from the holding portion 38E, so that the rotation angle detection device 50 is configured.

  Then, as shown in the exploded perspective view of FIG. 10, the rotation angle detection device 50 configured as described above is disposed behind the steering wheel 11 together with the rotation connector 52 and attached to the automobile according to the first embodiment. However, the mounting configuration of the rotation connector 52 and the rotation angle detection device 50 and the method of releasing the rotation holding of the rotating body 31 by the locking body 43 are different from those of the first embodiment.

  That is, on the left and right sides of the through hole 54A in the center of the fixed housing 53 of the rotary connector 52, a plurality of ribs 53A that protrude in the direction of the rotation angle detection device 50 and that face each holding portion 38E are disposed. When the angle detection device 50 is attached to the rotary connector 52, the rib 53A is inserted into the holding portion 38E of the rotation angle detection device 50.

  Then, as shown in FIG. 8, the rotation angle detector 50 is attached to the rotary connector 52 from the state in which the release portion 43C of the locking body 43 protrudes outward from the holding portion 38E of the case 38, and the release portion is attached by the rib 53A. When 43C is pressed, as shown in the cross-sectional view of FIG. 9, the locking body 43 rotates about the fulcrum part 43A and the release part 43C rotates inward, and the engaging part 31D of the cylinder part 31C. Since the latching portion 43B that is in elastic contact with the engagement portion 31D is separated from the engagement portion 31D, the rotating body 31 is in a rotatable state.

  That is, after the rotation angle detection device 50 is manufactured, the locking portion 43B of the locking body 43 elastically contacts the engaging portion 31D on the outer periphery of the cylindrical portion 31C of the rotating body 31, so that the rotating body 31 is neutral, which is zero. While being held in position, transportation and storage are performed, but when mounted on the vehicle, the release portion 43C is pressed by the rib 53A, the locking portion 43B is separated from the engaging portion 31D, and the rotating body 31 rotates. The rotation angle can be reliably detected with reference to the zero point stored by the control means 21.

  That is, even when the rotation angle detection device 50 is attached to the rotation connector 52 in the above-described configuration different from that in the first embodiment, the rotation angle detection device 50 is the same as in the first embodiment. Since the control means 21 stores 0 points in advance at the time of manufacture, and can be mounted on the vehicle while the rotation angle is held at 0 degrees of the neutral position by the locking body 43, the control means 21 can be mounted at the time of assembly to the vehicle. In addition, it is not necessary to store the zero point, so that it can be easily mounted on the vehicle and the rotation angle can be reliably detected.

  Thus, according to the present embodiment, the locking body 43 is provided in the case 38 in which the rotating body 31 and the control means 21 are housed, and the locking portion 43B biased by the spring 44 is provided to the rotating body 31. The cylinder 31C is elastically contacted with the engaging portion 31D on the outer periphery, and the release portion 43C protrudes outward from the case 31 to store the zero point in the control means 21 in advance, and the rotation angle is set by the locking body 43. Since it can be mounted on the vehicle with the neutral position held at 0 degrees, it is not necessary to store the zero point in the control means 21 when assembling to the vehicle, it is easy to mount on the vehicle, and the rotation angle is reliably detected. Thus, a rotation angle detecting device capable of achieving the above can be obtained.

  In the above description, the rotating body 31 is described as being configured to hold the rotation of the rotating body 31 by the two locking bodies 43 from both the left and right sides of the case 31. It is possible to implement the present invention even if the rotation is maintained.

  In the above description, the configuration in which the locking body 43 is urged by the spring 44 has been described. However, as in the case of the first embodiment, a thin plate-like spring portion is integrated with the locking body 43 made of insulating resin. It is good also as a structure which makes the latching body 43B elastically contact to the engaging part 31D by this spring part.

  Further, in the above description, the rotating bodies 1 and 31 and the gear portions of the detection bodies are engaged with each other and rotated in conjunction with each other. It is also possible to implement the present invention even if the portion or the like is formed on the outer periphery of the rotating body or the detecting body and thereby rotates in conjunction with each other.

  The rotation angle detection device according to the present invention can be easily mounted on a vehicle and can reliably detect the rotation angle, and is mainly useful for detecting the rotation angle of a steering wheel of an automobile.

Sectional drawing of the rotation angle detection apparatus by the 1st Embodiment of this invention Exploded perspective view Sectional view with the same Sectional view according to another embodiment Sectional view according to another embodiment Disassembled perspective view of steering device Sectional drawing of the rotation angle detection apparatus by the 2nd Embodiment of this invention Exploded perspective view Sectional view with the same Exploded perspective view of the steering device Sectional view of a conventional rotation angle detector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 31 Rotating body 1A, 2A, 3A, 31A Spur gear part 1B, 31B Engagement part 2 First detection body 3 Second detection body 5 First detection means 6 Second detection means 5A, 6A Magnet 5B , 6B Magnetic detection element 8, 38 Case 8A, 22A Through hole 8B, 8C, 22B, 22C Mounting hole 11 Steering wheel 12, 52 Rotating connector 13, 53 Fixed housing 13A Pin 14 Rotating housing 14A, 54A Through hole 14B Notch Part 15 Steering shaft 20, 40 Wiring board 21 Control means 22, 42 Cover 23, 26, 27, 43 Locking body 23A, 43A Supporting part 23B, 26B, 27B, 43B Locking part 23C, 26C, 27C, 43C Release part 24, 44 Spring 26A Spring part 30, 50 Rotation angle detection device 31C Tube part 38C Opening part 38D Projection part 38E Holding Part 53A Rib

Claims (3)

A rotating body provided with a gear portion on the outer periphery of the side surface that rotates in conjunction with the steering wheel, a detecting body that rotates in conjunction with the rotating body, a detecting means that detects the rotation of the detecting body, The control means for detecting the rotation angle of the rotating body based on the detection signal, and a case that accommodates these and has a mounting hole, a locking portion at one end and a release portion at the other end are formed. The locking portion and the release portion are integrated, and a locking body is provided that is held by the case so as to be rotatable or movable along a rotation plane of the rotating body, and the locking portion is urged by a spring to rotate the rotation body. Elastically contacting the gear portion of the body, projecting the release portion into the attachment hole of the case, and inserting a pin from the outside into the attachment hole, whereby the release portion is pressed by the pin and the engagement stop unit away from the gear unit Rotation angle detection device. A rotating body provided with a gear portion on the outer periphery of the side surface that rotates in conjunction with the steering wheel, a cylindrical portion inside the gear portion, a detecting body that rotates in conjunction with the rotating body, and a rotation of the detecting body is detected. The detection means, the control means for detecting the rotation angle of the rotating body based on the detection signal from the detection means, the housing is housed , and an opening is formed on the side surface and protrusions projecting outward on both sides of the opening. A case provided with a holding portion, provided with a notch-like engaging portion in the cylindrical portion of the rotating body, a locking portion formed at one end, and a releasing portion formed at the other end. And the release portion are integrally provided with a locking body held by the case so as to be rotatable or movable along a rotation plane of the rotating body, and the locking portion is urged by a spring to Elastically contact the engaging part, and the release part from the opening of the case Write to to protrude, by the ribs is inserted from the outside into the holding portion of the case, the rotation angle detecting device the release portion is the engaging portion is pressed by the rib is separated from the engaging portion. The rotation angle detection device according to claim 1 or 2, wherein a spring is integrally formed on the locking body.

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