JP2009293954A - Operating position detection apparatus and shifting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating position detection apparatus capable of compact formation while securing redundancy to fault of one sensor element and reliability in the detection of an input operating position. <P>SOLUTION: The operating position detection apparatus includes a plurality of magnetoresistive elements 31-37 provided in such a way that a combination of binary signals outputted from them may be based on hamming codes. The operating position detection apparatus specifies error signal positions of the combination of the binary signals on the basis of the combination of the binary signals outputted according to the directions of magnetic fields acting on the detecting surfaces of the plurality of the magnetoresistive elements 31-37 and corrects binary signals at the specified signal positions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an operation position detection device and a shift device that detect an operation position of an operation member such as a shift lever.

  Conventionally, some shift devices have a plurality of shift modes for switching the connection state of the transmission. For example, in the shift device described in Patent Document 1, the normal mode in which each position (D: drive, R: reverse, etc.) of the automatic transmission can be switched and the transmission gears of each stage are sequentially (stepwise). There are two shift modes, a switchable manual mode.

  Specifically, in this shift device, the shift gate on which the shift lever is disposed includes first and second gates that correspond to the two shift modes and extend substantially in parallel, and a third gate that is orthogonal to the first and second gates. The shift lever is provided so as to be movable along each of the gates. The shift device also includes an operation position detection device for detecting the operation position of the shift lever. The operating position detecting device is connected to a shift lever and swings in the extending direction of the first and second gates by the shifting operation, and swings in the extending direction of the third gate by the selecting operation. A second oscillating member and two non-contact type rotation detecting sensors for detecting the oscillation of the first and second oscillating members are provided. The shift operation position in each shift mode is detected by detecting the swing angle of the first swing member with the first rotation detection sensor, and the swing angle of the second swing member with the second rotation detection sensor. By detecting the selection operation position.

In addition, each rotation detection sensor is provided with two sensor elements that individually detect the operation of the shift lever in each direction so as to ensure the reliability of detection of the operation position of the shift lever. For this reason, for example, when one of the sensor elements fails, detection signals having different values are output from the two sensor elements. Based on this, it is possible to detect a failure of the sensor element. .
JP 2003-154869 A

  By the way, from the viewpoint of mounting on a vehicle, there is still a high demand for downsizing various devices mounted on the vehicle, and the shift device is no exception. However, since the conventional operation position detection device using the rotation detection sensor requires one rotation detection sensor for each movement direction of the shift lever, the operation of the shift lever operated in two directions orthogonal to each other as described above. In order to detect the position, it is necessary to separately provide at least two rotation detection sensors. For this reason, it is necessary to secure the installation space of the rotation detection sensor and its wiring space at a plurality of locations in the shift device, which hinders downsizing of the shift device.

  Moreover, the operation position detection apparatus using the conventional rotation detection sensor cannot identify which sensor element has failed when one sensor element has failed. For this reason, in the case where high detection reliability with respect to the input operation position is required, such as an operation position detection device that detects the operation position of the shift lever, only the failure of one sensor element is detected. In some cases, the detection of the operation position may be disabled in spite of the fact that the detection by the sensor element is possible. In this case, for example, since the shift device forcibly switches the connection state of the automatic transmission to neutral and operates the vehicle to the safe side, the vehicle cannot travel. Such an operation position detection device is not limited to a shift device, but can be applied to an input device such as a joystick operated in a plurality of directions. In this case, there is a problem similar to that described above.

  The present invention has been made to solve the above-described problems, and its purpose is an operation capable of downsizing while ensuring redundancy for failure of one sensor element and detection reliability of an input operation position. It is an object of the present invention to provide a position detecting device and a shift device using the same.

  The invention according to claim 1 is provided so as to be movable between a plurality of predetermined positions in accordance with the operation of the operation member and is magnetized in a direction crossing the moving direction, and the magnetizing direction. A plurality of magnetic detection means for outputting a binarized signal corresponding to the direction of the magnetic flux respectively provided according to the position of the detected object, and a plurality of the magnetic detection means Computing means for obtaining the position of the detected object based on the combination of the output binarized signals, and the plurality of magnetic detecting means, the combination of the binarized signals includes position information of the detected object. And a Hamming code that includes an error correction code for correcting an error of one binarized signal of the combination of the binarized signals unique to each predetermined position of the detected object To be The calculation means is configured such that a combination of binarized signals output from a plurality of the magnetic detection means is one for a combination of normal binarized signals corresponding to each predetermined position of the detected object. It is determined whether or not a combination of binarized signals having an error in the binarized signal, and the combination of the output binarized signals is a normal binarized signal corresponding to the position of the detected object. The binarization corresponding to each predetermined position of the detected object generated based on the combination of the output binary signals when the combination is a combination of the binary signals having one error with respect to the combination Based on the error signal position information corresponding to one error signal of the signal combination on a one-to-one basis, the error signal position of the binarized signal combination is specified, and the binarized signal at the specified signal position is corrected. To do that And effect.

  According to the present invention, since the detected object is detected in any one of a plurality of predetermined positions based on the combination of the binarized signals output from the plurality of magnetic detection means, the operation of moving in two directions The position of the member can be detected by one detected object. Further, since the plurality of magnetic detection means are provided along a plane that intersects the magnetization direction of the detected object, the operation position detection device in the input device can be concentrated. That is, unlike the prior art, it is not necessary to separately provide a detection target corresponding to each direction. Therefore, the input device can be reduced in size. In addition, since the plurality of magnetic detection means are provided so that the combination of the binarized signals output from them is compliant with the Hamming code, each of the predetermined objects of the detected object is utilized using this. One error in the binarized signal combination for the position is corrected. At that time, the calculation means converts the binarization signal output from the plurality of magnetic detection means into one binarization with respect to a normal binarization signal combination corresponding to each predetermined position of the detected object. It is determined whether or not it is a combination of binary signals having signal errors. When the combination of the output binarized signals is a combination of the binarized signals having one error with respect to the normal binarized signal combination corresponding to the position of the detected object Then, based on the error signal position information generated based on the output combination of the binarized signals, the error in the combination of the binarized signals with respect to the position of the detected object is corrected. Therefore, based on the error signal position information that corresponds one-to-one to one error signal of the combination of binarized signals for each predetermined position of the detected object, an error in the combination of the binarized signals for the position of the detected object occurs. Will be corrected. For this reason, for example, if the binarized signal output from one magnetic detection means has changed (inverted) due to failure of the magnetic detection means, noise, or the like, the position of the detected object is accurately detected. be able to. That is, it is possible to ensure redundancy against an error in the binarized signal output from one magnetic detection means. Therefore, it is possible to prevent the position of the operation member from being erroneously determined. Therefore, by using this operation position detection device, it is possible to reduce the size while ensuring redundancy for failure of one sensor element and detection reliability of the input operation position.

  The invention according to claim 2 is a combination of normal binarization signals corresponding to the position of the detected object, by adding the binarized signals weighted according to the corresponding magnetic detection means. On the other hand, the first weighted value associated only with the combination of the binarized signals having an error of one binarized signal and the weighted signal corresponding to the magnetic detection means corresponding to the binarized signal are added. By combining the binarized signal having an error of one binarized signal with respect to the normal binarized signal combination corresponding to the position of the detected object, the position of the detected object And a second weighting value associated with a combination of binarized signals that is also a combination of binarized signals having two binarized signal errors with respect to a normal binarized signal combination corresponding to Storing means for calculating the weighted value by adding the weighted binarized signals output from the plurality of magnetic detecting means according to the corresponding magnetic detecting means, and calculating the weighted value. When the weighting value is the first weighting value, the combination of the output binary signals has one error with respect to the combination of the binary signals corresponding to the position of the detected object. The gist of this is to determine that it is a combination of digitized signals.

  Since the plurality of magnetic detection means are provided so as to comply with the Hamming code, there are two errors with respect to a combination of normal binary signals corresponding to each predetermined position of the detected object The combination of the binarized signals may coincide with the combination of the binarized signals when there is one error with respect to the normal binarized signal combination corresponding to each predetermined position of the detected object. . In this regard, in the present invention, the calculation means is configured such that the combination of the binarized signals output from the plurality of magnetic detection means is one binary with respect to the combination of the normal binarized signals corresponding to the position of the detected object. In the case of a combination of binarized signals having binarized signal errors, the output binarized signal combination has one error for the binarized signal combination corresponding to the position of the detected object. It is determined that this is a combination of binary signals. For this reason, even if the combination of the output binarized signals is a combination of binarized signals having two binarized signal errors with respect to the normal binarized signal combination corresponding to the position of the detected object. If it is also a combination of certain binarized signals, the binarized signal combination is not corrected. Therefore, based on the error signal position information that corresponds one-to-one to one error signal of the combination of binarized signals for each predetermined position of the detected object, an error in the combination of the binarized signals for the position of the detected object occurs. Will be corrected.

  According to a third aspect of the present invention, there is provided a combination of binarized signals having an error of one binarized signal with respect to a combination of normal binarized signals corresponding to the position of the detected object, and the detected object A combination of binarized signals having an error of one binarized signal with respect to a combination of normal binarized signals corresponding to the position of the body, and a normal binary corresponding to the position of the detected object Storage means for storing a combination of binarized signals, which is also a combination of binarized signals having an error of two binarized signals with respect to the combination of the binarized signals, and the computing means includes the output binary When the combination of the binarized signals is a combination of binarized signals having an error of one binarized signal with respect to the normal binarized signal combination corresponding to the position of the detected object, the output Combined binarized signals The gist of this is to determine that the combination of the binarized signals having an error of one binarized signal with respect to the combination of the normal binarized signals corresponding to each predetermined position of the detected object And

  According to the present invention, by obtaining the same operation as that of the second aspect, based on the error signal position information corresponding one-to-one to one error signal of the combination of the binarized signals for each predetermined position of the detected object. Thus, an error in the combination of the binarized signals with respect to the position of the detected object is corrected.

  According to a fourth aspect of the present invention, the detected object is provided so as to be movable in a first direction and a second direction orthogonal to the first direction, and the magnetic detection means includes the first direction. The gist of the present invention is that a plurality of the first and second directions are provided along the second direction and the second direction.

  According to the present invention, the predetermined position can be set at a plurality of locations along the first direction, and the predetermined position can be set at a plurality of locations along the second direction orthogonal to the first direction. can do. For this reason, by selecting the predetermined position according to the operation pattern of the operation member, it is possible to cope with a plurality of types of operation patterns. Therefore, versatility is improved.

The gist of the invention described in claim 5 is that the plurality of magnetic detection means include two magnetic detection means arranged so as to overlap each other when viewed from the magnetization direction of the detected object.
According to the present invention, it is possible to reduce the size of the operation position detection device in the direction along the moving direction of the detection target.

  The invention according to claim 6 includes an operation member operated at a plurality of operation positions set along the shift gate, and an operation position detection device that detects an operation position of the operation member, and detects the operation position. A shift device that switches a connection state of a transmission of a vehicle based on a detection result of the device, the gist of which includes the operation position detection device according to any one of claims 1 to 5.

  According to the present invention, the shift device can be downsized by obtaining the same operation as that of the first aspect. In addition, since the plurality of magnetic detection means are provided so that the combination of the binarized signals output from them is compliant with the Hamming code, each of the predetermined objects of the detected object is utilized using this. One error in the combination of the binarized signals with respect to the position can be detected. For this reason, it is possible to detect that one magnetic detection means has failed in a state where the position of the detected object can be accurately detected, and to notify the fact. Therefore, safety is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the operation position detection apparatus which can be reduced in size, and the shift apparatus using the same can be provided, ensuring the redundancy with respect to the failure of one sensor element, and the detection reliability of an input operation position.

Hereinafter, an embodiment in which the present invention is embodied in a by-wire shift device that switches a connection state of an automatic transmission of a vehicle by electric control will be described with reference to the drawings.
As shown in FIG. 1, the shift device 1 is installed on a steering column 2 on which a steering wheel W is installed. The shift device 1 includes a shift lever 3 as an operation member protruding from the opening 2a on the left side surface of the steering column 2, and a shift device main body 4 disposed in the steering column 2 so as to correspond to the opening 2a. And. The base end portion of the shift lever 3 is supported by the shift device main body 4, and an operation knob 3 a that is gripped by the driver is formed at the distal end portion. The operation knob 3a is provided with a parking switch 3b.

  The shift lever 3 includes a shift panel 5 fixed to the steering column 2 so as to cover the opening 2a. The shift lever 3 is provided so as to be movable between shift positions set at a plurality of positions in the shift gate 6 along the shift gate 6 formed in the shift panel 5. Specifically, as shown in FIG. 2, the shift gate 6 is a T-type, and the first gate 6 a extends in the vertical direction (hereinafter referred to as the shift direction) along the circumferential direction of the steering column 2. And a second gate 6b extending from a substantially central portion of the first gate 6a to the vehicle front side in a direction orthogonal to the first gate 6a (hereinafter referred to as a select direction). The length of the second gate 6b is about half that of the first gate 6a. The shift direction corresponds to the first direction, and the select direction corresponds to the second direction.

  In the present embodiment, the position corresponding to the end of the second gate 6b on the vehicle front side is the neutral position “T”, the position where the second gate 6b and the first gate 6a intersect is the neutral position “N”, and the first gate. The position corresponding to the upper end of 6a is set to the reverse position “R”, and the position corresponding to the lower end of the first gate 6a is set to the drive position “D”. The shift lever 3 is elastically held at the neutral position T by the shift device main body 4. When the operation force is released after the shift lever 3 is operated from the neutral position T to each of the shift positions N, R, and D, the neutral position again. Return to T. The driver grips the operation knob 3a and pulls the shift lever 3 toward the driver side, operates the neutral lever T to the neutral position N, and then moves the shift lever 3 to the upper reverse position R or the lower drive. Operate to position D.

  As shown in FIG. 3, the shift device main body 4 includes a case 7 fixed inside the steering column 2. The case 7 is formed in a substantially box shape that opens to the front side of the vehicle, and forms a lower case 7a of the case 7 on the vehicle rear side (steering wheel W side), and the lower case 7a on the vehicle front side of the lower case 7a. The upper case 7b is formed in a substantially box shape that opens to the rear side of the vehicle and is fixed so as to cover the opening. The lower case 7a and the upper case 7b are formed by magnesium die casting. As shown in FIG. 4, a connector portion 8 is provided at a lower right side (lower left side in FIG. 4) in the case 7 when viewed from the driver's seat side. The connector portion 8 has a bottomed rectangular tube shape that opens to the outside of the case 7 and protrudes toward the vehicle front side through an opening portion 7c provided in a lower portion of the upper case 7b. The connector portion 8 is provided with a connector terminal 8a in a manner derived from the bottom surface.

Next, a support structure for the shift lever 3 provided in the case 7 will be described.
As shown in FIG. 5, a substantially rectangular parallelepiped block 11 extending along the axial direction of the shift lever 3 is provided integrally with the shift lever 3 at the base end portion of the shift lever 3. The block 11 is supported by the case 7 via a bracket 12 having a substantially rectangular tube shape that opens in the left-right direction.

  Specifically, the block 11 is inserted into the bracket 12 in the left-right direction. The block 11 is formed with an insertion hole 11a having a circular cross section in the shift direction. The insertion hole 11 a is provided in a portion on the left side (right side in FIG. 5) from the center of the block 11. On the upper and lower walls 12a and 12b of the bracket 12, through holes 12c having a circular cross section are provided. Each through-hole 12c is provided in a portion corresponding to the insertion hole 11a in a state where the block 11 is accommodated in the bracket 12. The first rotating shaft 13 is inserted through the block 11 from the lower side in the figure in a state where the insertion hole 11a and the through hole 12c are arranged in the bracket 12 so as to coincide with each other. The first rotating shaft 13 is fixed to the insertion hole 11 a of the block 11 and is rotatably supported by the through hole 12 c of the bracket 12. Therefore, the block 11 (shift lever 3) is rotatable in the select direction about the first axis L1 that is the central axis of the first rotation shaft 13 with respect to the bracket 12 (see FIG. 6).

  Here, as shown in FIG. 6, a stopper portion 11 b that protrudes to the rear side of the vehicle is provided on the rear side surface of the block 11 on the right side (left side in FIG. 6) of the first rotating shaft 13. For this reason, the stopper portion 11b abuts on the inner surface of the rear wall portion 12d of the bracket 12, thereby causing the block 11 to move toward the rear side of the vehicle around the first rotation shaft 13 (counterclockwise in FIG. 6). ) Is restricted. Further, a notch 12e is formed in a right portion of the wall portion on the front side (the upper side in FIG. 6) of the bracket 12. Therefore, the block 11 is allowed to rotate in the vehicle front side (clockwise direction in FIG. 6) about the first axis L1.

  As shown in FIG. 6, a substantially cylindrical second rotating shaft portion 12 f extending to the rear side of the vehicle is erected on the left side (right side in FIG. 6) of the rear outer surface of the bracket 12. The second rotation shaft portion 12f is formed such that its central axis intersects the first axis L1 that is the central axis of the first rotation shaft 13 at a right angle. Further, an arcuate convex portion 12g having an arc shape centering on the second axis L2 is formed on the rear outer side surface of the bracket 12 on the right side (left side in FIG. 6) of the second rotating shaft portion 12f. Yes. On the other hand, a bearing concave portion 7e having a circular cross section corresponding to the second rotating shaft portion 12f is formed in the bottom portion 7d on the rear side of the case 7 (lower case 7a). Further, an arc-shaped concave portion 7f having a wider range than the arc-shaped convex portion 12g is formed at a portion corresponding to the arc-shaped convex portion 12g in the bottom portion on the front side of the case 7 (upper case 7b). Then, in a state where the upper case 7b and the lower case 7a are fixed to each other, the second rotary shaft portion 12f and the arc-shaped convex portion 12g are supported by the bearing concave portion 7e and the arc-shaped concave portion 7f, respectively. It is supported so as to be rotatable in the shift direction about the second axis L2 that is the central axis of the portion 12f (see FIG. 5).

  Therefore, the shift lever 3 rotates in the select direction about the first axis L1 along the shift gate 6 with respect to the case 7, and the shift direction about the second axis L2 orthogonal to the first axis L1. It rotates in the circumferential direction of the steering column. Further, as described above, since the rotation of the block 11 with respect to the case 7 with respect to the case 7 around the first rotating shaft 13 is restricted, the vehicle in the select direction around the first axis L1 of the shift lever 3 is restricted. The rotation to the front side is restricted.

  Further, as shown in FIG. 5, a detent pin holding portion 14 that opens to the opposite side to the shift lever 3 is recessed at the right end (left side in FIG. 5) of the block 11. The detent pin holding portion 14 is formed in a circular cross section, and a linear linear groove portion 14a extending along the axial direction is recessed in the inner peripheral surface thereof. In the detent pin holding part 14, a spring 15 and a detent pin 16 are arranged in order from the bottom side of the detent pin holding part 14.

  One end of the spring 15 is held by a spring holding portion 14 b provided at the bottom of the detent pin holding portion 14, and the other end is held by a holding recess 16 a provided at the end surface of the detent pin 16. The detent pin 16 is always urged in a direction protruding from the detent pin holding portion 14 by the elastic force of the spring 15.

  A portion of the detent pin 16 where the spring holding portion 14 b is provided is formed in a circular cross section having an outer diameter substantially equal to the inner diameter of the detent pin holding portion 14. The detent pin 16 is in a state in which the stopper portion 11b of the block 11 is in contact with the inner surface of the rear wall portion 12d of the bracket 12, and the center axis of the detent pin 16 is the first axis L1 and the second axis L2. Are held by the detent pin holding part 14 so as to be orthogonal to them at the intersection of the two. On the outer peripheral surface of the portion where the spring holding portion 14 b is provided in the detent pin 16, a linear linear convex portion 16 b extending along the axial direction of the detent pin 16 is provided. The detent pin 16 is held by the detent pin holding portion 14 in a state in which the linear convex portion 16b is disposed in the linear groove portion 14a. Thereby, the rotation of the detent pin 16 with respect to the block 11 is restricted. The detent pin 16 is held so as to be slidable in the axial direction with respect to the block 11.

  As shown in FIG. 5, a fitting portion 16c having a circular cross section having a smaller outer diameter than the portion where the spring holding portion 14b is provided at the distal end side (left side in FIG. 5) of the detent pin 16. Is provided. The distal end surface 16d of the fitting portion 16c is formed in a hemispherical shape protruding toward the distal end side, and a quadrangular prism-like shape extending along the axial direction of the detent pin 16 is formed at a portion corresponding to the top of the distal end surface 16d. A connecting portion 16e is provided.

  The fitting portion 16c is inserted into the guide recess 17a of the detent 17 fixed to the bottom 7d of the case 7, and slidably contacts the bottom surface 17b of the guide recess 17a. The connecting portion 16e is inserted into a guide hole 17c provided in the bottom surface 17b of the guide recess 17a, and a portion on the tip side protrudes to the opposite side of the bracket 12 of the detent 17 through the guide hole 17c. Yes.

  As shown in FIG. 7, the guide recess 17 a is formed in a substantially T shape when viewed from the detent pin 16 side, and extends in the shift direction along the rotation direction around the second axis L <b> 2 of the shift lever 3. A shift direction guide portion 18a that extends, and a select direction guide portion 18b that extends rearward from the substantially central portion of the shift direction guide portion 18a along the rotational direction around the first rotation shaft 13 of the shift lever 3. I have. The guide hole 17c is substantially T-shaped like the guide recess 17a.

  The bottom surface 17b of the guide recess 17a is closer to the center of the shift direction guide portion 18a as shown in FIG. 8, and further toward the tip side (rear side) of the select direction guide portion 18b as shown in FIG. 11 is inclined so as to be separated from 11.

  Here, for example, as shown in FIG. 10, the shift lever 3 is operated from the neutral position T to the neutral position N in the select direction, and the end of the block 11 opposite to the shift lever 3 is in the first rotation. When rotating forward about the shaft 13, the fitting portion 16c of the detent pin 16 is displaced in the displacement direction of the inner end portion of the block 11 along the selection direction guide portion 18b. At this time, as the fitting portion 16c is displaced in the displacement direction of the inner end portion of the block 11 along the selection direction guide portion 18b, the tip surface 16d of the fitting portion 16c contacts the bottom surface 17b of the guide concave portion 17a. And the distance between the blocks 11 gradually decreases. For this reason, the detent pin 16 is displaced to the side of the block 11 entering the detent pin holding portion 14 against the urging force of the spring 15. When the operating force is released in this state, the fitting portion 16c of the detent pin 16 is blocked by the elastic force of the spring 15 from the portion where the tip surface 16d of the fitting portion 16c contacts the bottom surface 17b of the guide recess 17a. 11 is moved along the select direction guide portion 18b to the tip end portion of the select direction guide portion 18b so that the distance to the head 11 increases. As a result, the shift lever 3 returns to the neutral position T.

  On the other hand, as shown in FIG. 11, the shift lever 3 is further operated from the neutral position N to the reverse position R or drive position D in the shift direction, and the block 11 rotates downward or upward about the second axis L2. Then, the fitting portion 16c of the detent pin 16 is displaced in the displacement direction of the inner end portion of the block 11 along the shift direction guide portion 18a. At this time, as the fitting portion 16c is displaced along the shift direction guide portion 18a in the displacement direction of the inner end portion of the block 11, the front end surface 16d of the fitting portion 16c comes into contact with the bottom surface 17b of the guide concave portion 17a. The distance between the part and the block 11 is gradually reduced. For this reason, the detent pin 16 is displaced to the side of the block 11 entering the detent pin holding portion 14 against the urging force of the spring 15. When the operating force is released in this state, the fitting portion 16c of the detent pin 16 is blocked by the elastic force of the spring 15 from the portion where the tip surface 16d of the fitting portion 16c contacts the bottom surface 17b of the guide recess 17a. 11 is moved along the shift direction guide portion 18a to a position where the shift direction guide portion 18a and the select direction guide portion 18b cross each other, and further moved to the distal end portion of the select direction guide portion 18b. To do. As a result, the shift lever 3 returns to the neutral position T. That is, when the detent pin 16 elastically supported by the spring 15 and the guide recess 17a of the detent 17 hold the shift lever 3 in the neutral position T and the operating force to the shift lever 3 is released, the shift is performed. A return mechanism for returning the lever 3 to the neutral position T is configured.

  When the shift lever 3 is operated from the neutral position T to the reverse position R and the drive position D, the shift lever 3 passes through the neutral position N of the shift gate 6, and the detent pin 16 is selected with the shift direction guide portion 18a. Get over the corner between the direction guide 18b. For this reason, the driver can obtain a sense of moderation when operating the shift lever 3. In other words, the detent pin 16 elastically supported by the spring 15 and the guide recess 17a of the detent 17 constitute a moderation mechanism that provides an operational feeling when operating the shift lever 3 at each shift position.

Next, the operation position detection device 20 that detects the shift position as the operation position of the shift lever 3 configured as described above will be described.
As shown in FIGS. 5 and 6, a magnet holder 21 is connected to the tip of the detent pin 16. The magnet holder 21 is formed in a substantially rectangular plate shape, and moves along a plane direction intersecting the axial direction of the detent pin 16 by a slider 22 fixed to the right side of the detent 17 at the bottom 7d of the case 7. Supported as possible.

  A holder through hole 21 a is formed in the magnet holder 21. On the surface of the magnet holder 21 on the detent pin 16 side, a substantially cylindrical detent pin connecting portion 21b is provided around the holder through hole 21a. An engaging member 21c is fixed to the distal end side portion of the detent pin connecting portion 21b so as to cover the opening. The engaging member 21c is provided with an engaging hole 21d at a portion corresponding to the holder through hole 21a. The engaging hole 21d is formed in a square shape corresponding to the connecting portion 16e of the detent pin 16, and the connecting portion 16e extends along the engaging hole 21d in a state where the rotation with respect to the engaging member 21c is restricted. It is inserted so as to be displaceable in the axial direction. The connecting portion 16e of the detent pin 16 is inserted through the engagement hole 21d. For this reason, the detent pin 16 engages with the magnet holder 21 in the direction along the moving plane Q. Accordingly, when the shift lever 3 is operated and the connecting portion 16e of the detent pin 16 is displaced, the magnet holder 21 is displaced in the displacement direction in the direction along the moving plane Q.

  A substantially cylindrical magnet holding portion 21 e is provided on the surface of the magnet holder 21 opposite to the detent pin 16. Inside the magnet holding part 21e, a magnet 23 as a detected body constituting the operation position detecting device 20 is fixed. The magnet 23 is formed in a substantially cylindrical shape, and is magnetized in a direction orthogonal to the moving plane Q.

  Two first and second magnetic sensor modules 24 and 25 constituting the operation position detecting device 20 are provided at a portion of the bottom portion 7d of the case 7 opposite to the shift lever 3 of the slider 22. The first and second magnetic sensor modules 24 and 25 are each formed in a substantially flat plate shape and are provided in parallel with the moving plane Q of the magnet 23. The magnet 23 has an S pole on the first and second magnetic sensor modules 24 and 25 side and an N pole on the opposite side.

  As shown in FIG. 12B, the first and second magnetic sensor modules 24 and 25 are mounted on one surface and the other surface of the substrate 30 and fixed to the lower case 7 a via the slider 22. Has been.

  The first magnetic sensor module 24 is formed by packaging three magnetoresistive elements 31 to 33 as magnetic detection means together with their peripheral circuits, and is formed in a substantially rectangular plate shape as a whole. The second magnetic sensor module 25 is a package of four magnetoresistive elements 34 to 37 as magnetic detection means together with their peripheral circuits. Like the first magnetic sensor module 24, the second magnetic sensor module 25 has a substantially rectangular plate shape as a whole. Is formed. The first and second magnetic sensor modules 24 and 25 are provided such that the horizontal direction in FIG. 12A is the select direction, and the vertical direction in FIG. 12A is the shift direction. Yes. In the present embodiment, the seven magnetoresistive elements 31 to 37 are arranged so that the combination of the binarized signals S1 to S7 output corresponding to the position of the magnet 23 conforms to the Hamming code. ing.

  The first and second magnetic sensor modules 24 and 25 are arranged in the case 7 so that the center position of the first and second magnetic sensor modules 24 and 25 and the magnet 23 in the case where the shift lever 3 is disposed at the neutral position N. The center M is arranged so as to coincide. The first magnetoresistive element 31 of the first magnetic sensor module 24 is at the lower right corner in FIG. 12A, and the second magnetoresistive element 32 is at the lower left corner in FIG. The third magnetoresistive elements 33 are provided at the corners on the upper right side in FIG. The fourth magnetoresistive element 34 of the second magnetic sensor module 25 is at the lower right corner in FIG. 12A, and the fifth magnetoresistive element 35 is at the upper left corner in FIG. 12A. The sixth magnetoresistive element 36 is provided at the lower left corner of FIG. 12A, and the seventh magnetoresistive element 37 is provided at the upper right corner of FIG. 12A. The magnetoresistive elements 34 to 37 of the second magnetic sensor module 25 are arranged so as to make a pair with a movement center (movement locus of the center M) when the magnet 23 moves. The first, second, and third magnetoresistive elements 31, 32, and 33 are arranged so as to overlap the fourth, sixth, and seventh magnetoresistive elements 34, 36, and 37, respectively, when viewed from the direction orthogonal to the moving plane Q. (See FIG. 12B).

  In the present embodiment, as described above, since the magnet 23 is magnetized in the direction orthogonal to the moving plane Q, the plane Q1 along the detection surface of the magnetoresistive elements 31 to 33 and 34 to 37 is placed on the plane Q1. A radial magnetic flux centering on the central axis of the magnet 23 is formed. Accordingly, as shown in FIG. 12A, the second and sixth magnetoresistive elements 32 and 36 in the lower left region with respect to the central axis (center M) of the magnet 23 and the third in the upper right region. A magnetic field in the direction along the arrow A1 direction is applied to the seventh magnetoresistive elements 33 and 37. Further, the fifth magnetoresistive element 35 in the upper left region with respect to the central axis of the magnet 23 and the first and fourth magnetoresistive elements 31 and 34 in the lower right region are along the direction of the arrow A2. A directional magnetic field is applied. That is, in the two regions that are paired across the moving center of the magnet 23 in the plane Q1 including the detection surfaces of the magnetoresistive elements 31 to 33 and 34 to 37, the direction of the magnetic flux applied by the magnet 23 is the center M. The region on the one side in the moving direction is different from the region on the other side.

  For each of the magnetoresistive elements 31 to 33 and 34 to 37, for example, a so-called MR sensor in which four magnetoresistors are connected in a bridge shape can be employed. The resistance value of the magnetoresistive changes according to the applied magnetic field (more precisely, the direction of the magnetic flux). The first to seventh magnetoresistive elements 31 to 37 input the midpoint potential (detection signal) of the bridge-like circuit described above to a comparator (not shown), thereby depending on the direction of the magnetic flux applied to their detection surfaces. A binarized signal having a value of “0” or “1” is generated and the binarized signal is output. In the present embodiment, the first to third magnetoresistive elements 31 to 33 of the first magnetic sensor module 24 have an angle of −45 degrees (+135 degrees) with respect to the shift direction of the magnetic flux applied to the first to third magnetoresistive elements 31 to 33. An analog signal having a period of 180 degrees and a maximum value (peak) when making an angle and a minimum value (bottom) when forming an angle of +45 degrees (+225 degrees) with respect to the shift direction is output. Therefore, the signal waveforms of the first to third magnetoresistive elements 31 to 33 show the maximum value (peak) when the magnetic flux along the arrow A1 direction in FIG. When a magnetic flux is applied along the direction of arrow A2 in a), the minimum value (bottom) is taken. On the other hand, the fourth to seventh magnetoresistive elements 34 to 37 of the second magnetic sensor module 25 have the minimum value when the direction of the magnetic flux applied thereto forms an angle of −45 degrees (+135 degrees) with respect to the shift direction. When the (bottom) forms an angle of +45 degrees (+225 degrees) with respect to the shift direction, an analog signal having a maximum value (peak) and a period of 180 degrees is output. Therefore, the signal waveforms of the fourth to seventh magnetoresistive elements 34 to 37 have the minimum value (bottom) when the magnetic flux along the direction of the arrow A1 in FIG. When a magnetic flux along the direction of arrow A2 is applied in a), the maximum value (peak) is taken. That is, the fourth to seventh magnetoresistive elements 34 to 37 of the second magnetic sensor module 25 are values obtained by inverting the positive and negative of the detection signals of the first to third magnetoresistive elements 31 to 33 of the first magnetic sensor module 24, respectively. The detection signal is output. A comparator (not shown) compares the midpoint potential (detection signal) output from each of the magnetoresistive elements 31 to 37 with a preset threshold value, and generates a binarized signal. This threshold value is used to determine whether the center of the magnet 23 is on one side or the other side of each of the magnetoresistive elements 31 to 37 in the moving direction. In the present embodiment, the value of the detection signal output from each of the magnetoresistive elements 31 to 37 when the magnetic flux in the direction along the shift direction or the select direction is applied to each of the magnetoresistive elements 31 to 37. It is preset as a threshold value. The comparator compares the detection signal output from each of the magnetoresistive elements 31 to 37 with a preset threshold value. When the detection signal is larger than the threshold value, “1”, and when the detection signal is smaller than the threshold value Generates and outputs binarized signals S1 to S7 having a value of “0”.

  As shown in FIG. 13, each of the magnetoresistive elements 31 to 37 is connected to the connector terminal (not shown) on the vehicle side based on the connection of the connector portion 8 to the connector (not shown) on the vehicle side. Individually connected to a controller 39 as a calculation means provided outside the case 7. The parking switch 3b is electrically connected to the controller 39 based on the connection of the connector portion 8 to the vehicle-side connector, like the magnetoresistive elements 31 to 37.

  Specifically, the controller 39 is a computer unit including a CPU, a ROM, a RAM, and the like (not shown), and is based on a combination of binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37. The position of the magnet 23 on the moving plane Q is detected, and the position of the shift lever 3 is detected. Further, the controller 39 detects the pressing operation of the parking switch 3b based on the operation signal S9 output from the parking switch 3b. And the controller 39 switches the connection state of the automatic transmission of the vehicle which is not shown based on the detection result.

Here, combinations of the binarized signals S1 to S7 output from the magnetoresistive elements 31 to 37 according to the position of the shift lever 3 (magnet 23) will be described.
As described above, since the magnet 23 is magnetized in the direction orthogonal to the moving plane Q, the plane Q1 including the detection surfaces of the magnetoresistive elements 31 to 37 is centered on the central axis of the magnet 23. Radial magnetic flux is formed. The first to seventh magnetoresistive elements 31 to 37 output binarized signals S <b> 1 to S <b> 7 having values corresponding to the position of the center M of the magnet 23.

  For example, when the shift lever 3 is in the neutral position T, as shown in FIG. 14, the center M of the magnet 23 is located at the rear position P2 in the select direction with respect to the centers of the first and second magnetic sensor modules 24 and 25. Be placed. In this case, the value of the binarized signal S1 of the first magnetoresistive element 31 of the first magnetic sensor module 24 is “0”, the value of the binarized signal S2 of the second magnetoresistive element 32 is “0”, the third The value of the binarized signal S3 of the magnetoresistive element 33 is “1”. The value of the binarized signal S4 of the fourth magnetoresistive element 34 of the second magnetic sensor module 25 is “1”, the value of the binarized signal S5 of the fifth magnetoresistive element 35 is “0”, and the sixth magnetic The value of the binarized signal S6 of the resistor element 36 is “1”, and the value of the binarized signal S7 of the seventh magnetoresistive element 37 is “0”.

  When the shift lever 3 is operated to the neutral position N, the center M of the magnet 23 is disposed at a position P5 that coincides with the centers of the first and second magnetic sensor modules 24 and 25. In this case, the value of the binarized signal S1 of the first magnetoresistive element 31 of the first magnetic sensor module 24 is “0”, the value of the binarized signal S2 of the second magnetoresistive element 32 is “1”, the third The value of the binarized signal S3 of the magnetoresistive element 33 is “1”. The value of the binarized signal S4 of the fourth magnetoresistive element 34 of the second magnetic sensor module 25 is “1”, the value of the binarized signal S5 of the fifth magnetoresistive element 35 is “1”, and the sixth magnetic The value of the binarized signal S6 of the resistor element 36 is “0”, and the value of the binarized signal S7 of the seventh magnetoresistive element 37 is “0”.

  When the shift lever 3 is operated to the reverse position R, the center M of the magnet 23 is disposed at a position P6 that is lower in the shift direction than the centers of the first and second magnetic sensor modules 24 and 25. In this case, the value of the binarized signal S1 of the first magnetoresistive element 31 of the first magnetic sensor module 24 is “1”, the value of the binarized signal S2 of the second magnetoresistive element 32 is “0”, the third The value of the binarized signal S3 of the magnetoresistive element 33 is “1”. The value of the binarized signal S4 of the fourth magnetoresistive element 34 of the second magnetic sensor module 25 is “0”, the value of the binarized signal S5 of the fifth magnetoresistive element 35 is “1”, and the sixth magnetic The value of the binarized signal S6 of the resistor element 36 is “1”, and the value of the binarized signal S7 of the seventh magnetoresistive element 37 is “0”.

  Further, when the shift lever 3 is operated to the drive position D, the center M of the magnet 23 is disposed at a position P4 above the center of the first and second magnetic sensor modules 24 and 25 in the shift direction. In this case, the value of the binarized signal S1 of the first magnetoresistive element 31 of the first magnetic sensor module 24 is “0”, the value of the binarized signal S2 of the second magnetoresistive element 32 is “1”, the third The value of the binarized signal S3 of the magnetoresistive element 33 is “0”. The value of the binarized signal S4 of the fourth magnetoresistive element 34 of the second magnetic sensor module 25 is “1”, the value of the binarized signal S5 of the fifth magnetoresistive element 35 is “0”, and the sixth magnetic The value of the binarized signal S6 of the resistor element 36 is “0”, and the value of the binarized signal S7 of the seventh magnetoresistive element 37 is “1”.

  Therefore, as shown in FIG. 15, the combinations of the binarized signals S <b> 1 to S <b> 7 output from the first to seventh magnetoresistive elements 31 to 37 are different at each position of the shift lever 3. In the memory 39a of the controller 39, positions P2, P4, P5 and P6 of the magnet 23 corresponding to the position of the shift lever 3 and combinations of binarized signals from the first to seventh magnetoresistive elements 31 to 37 are stored. It is stored in association. The memory 39a corresponds to a storage unit. The controller 39 is based on the combination of the binarized signals S1 to S7 from the first to seventh magnetoresistive elements 31 to 37 and the error signal position information generated based on the combination of the binarized signals S1 to S7. The operation position of the shift lever 3 is detected. In FIG. 15, the first to seventh magnetoresistive elements 31 to 37 are represented by letters “MR1” to “MR7”, respectively.

  Further, all combinations of the binarized signals S1 to S7 output from the magnetoresistive elements 31 to 37 are different for each of the positions P1 to P7 of the magnet 23 at a plurality of locations in the select direction and the shift direction. Therefore, by selecting the positions P1 to P7 of the magnet 23 and the combinations of the binarized signals from the first to seventh magnetoresistive elements 31 to 37 in association with each other in the memory 39a of the controller 39, the select direction and shift The positions of the magnets 23 at a plurality of locations in the direction can be detected. In the present embodiment, since the combinations of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are different when the magnet 23 is arranged at seven positions, this embodiment is different. In this form, up to seven operation positions of the shift lever 3 can be set.

  By the way, when the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are normal, the binarized signals S1 to S1 output from the first to seventh magnetoresistive elements 31 to 37 are normal. The combination of S7 applies to any combination of binarized signals corresponding to the position of the magnet 23 assumed in advance. Therefore, when the combination of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 does not apply to the combination of the binarized signals assumed in advance, the position of the magnet 23 is The binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are not normal.

  In the operation position detecting device 20 of the present embodiment configured as described above, the first to seventh magnetoresistive elements 31 to 37 have combinations of binarized signals output from them that conform to the Hamming code. It is provided as follows. The Hamming code is used as a technique for correcting a code error that occurs in a communication channel during data communication and improving the reliability of communication. A 1-bit code is used for data between a transmission side and a reception side. If an error occurs, it can be detected and corrected (error correction capability 1). In the present embodiment, by using this Hamming code, binarization output from the first to seventh magnetoresistance elements 31 to 37 corresponding to the “normal combination of binarization signals” corresponding to the position of the magnet 23 is performed. It is possible to correct one error of the combination of the signals S1 to S7. The controller 39 determines the position of the magnet 23 based on the corrected combination of binary signals, and switches the connection state of the automatic transmission of the vehicle (not shown) to a connection state corresponding to the position of the magnet 23. Also, one or two combinations of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 with respect to the “normal binarized signal combination” corresponding to the position of the magnet 23. It is possible to detect errors. When one or two errors in the combination of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are detected, the controller 39 passes through an alarm device (not shown). , To that effect. Further, when the controller 39 determines that the combination error of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 cannot be corrected, the connection state of the automatic transmission is set to neutral. Switch.

Here, an outline of the Hamming code will be described.
A Hamming code is obtained by adding redundant bits (check bits) to information bits (data bits) to be transmitted.
Code length: n = 2 ^m −1
Number of information: k = nm
Consists of. Here, the number of information k is the number of information bits, and the code length n is the number of bits constituting one code.

  When encoding information bits to be transmitted into a Hamming code or decoding a received code, processing is performed using a check matrix H and a generator matrix G. The check matrix H is a matrix of m rows and n columns, and satisfies the condition that all column elements are not 0 and are different. On the other hand, the generator matrix G is a matrix that satisfies the following expression (1) with the check matrix H and is not 0.

なお、Ｇ^Ｔは、生成行列Ｇの転置行列であり、Ｈ^Ｔは、検査行列Ｈの転置行列である。検査行列Ｈ及び生成行列Ｇの一例を、図１６に示す。

G ^T is a transposed matrix of the generator matrix G, and H ^T is a transposed matrix of the check matrix H. An example of the check matrix H and the generator matrix G is shown in FIG.

  When encoding information into a Hamming code, the generator matrix G is multiplied by the bit string x of the data to be transmitted. In addition, all the additions used in each matrix calculation are exclusive OR. On the other hand, when decoding the received code, the product of the check matrix H and the received code is obtained and decoded. In this case as well, all the additions used in each matrix calculation are exclusive OR. Here, assuming that the code received on the receiving side is Y, when there is no error in Y, Y is expressed by the following equation (2).

この受信した符号Ｙと、検査行列Ｈの転置行列との積は、式（１）より、以下の式（３）のようになる。

The product of the received code Y and the transposed matrix of the check matrix H is expressed by the following formula (3) from the formula (1).

即ち、受信した符号と検査行列の積が０（ゼロベクトル）であるなら誤りを含まないことになり、０でないなら誤りを含むことになる。

That is, if the product of the received code and the check matrix is 0 (zero vector), no error is included, and if it is not 0, an error is included.

  Here, for example, it is assumed that the received code Y includes a 1-bit error. In this case, the received code Y is expressed as the following equation (4).

なお、ｅ_ｉは誤りベクトルであり、ｉ番目のビットが１、それ以外のビットが０のビット列である。

_Ei is an error vector, and is a bit string in which the i-th bit is 1 and the other bits are 0.

At this time, the product of the received code Y and the transposed matrix H ^T of the check matrix is expressed by the following equation (5). In addition, all the additions used in each matrix calculation are exclusive OR.

ここで、ｅ_ｉはｉ番目のビットのみが１であるので、検査行列Ｈのｉ番目の列が出力されることになる。従って、この出力（以下、シンドロームという。）が検査行列Ｈの何列目と一致するかを比べることにより、送信された符号に対する受信した符号の誤りの位置が検出され、その部分のビットを反転することで誤りを訂正することができる。

Here, since only the i-th bit of e _i is 1, the i-th column of the check matrix H is output. Therefore, the position of the error of the received code with respect to the transmitted code is detected by comparing with what column of the check matrix H this output (hereinafter referred to as syndrome) matches, and the bit of that portion is inverted. By doing so, the error can be corrected.

  In the operation position detection apparatus 20 according to the present embodiment, when using such a Hamming code, the binarized signals S1 to S7 output from the magnetoresistive elements 31 to 37 are arranged as shown in the table of FIG. By assigning), a combination of binarized signals conforming to the Hamming code described above is generated.

  Specifically, in this example, the binarized signals S1 to S7 output from the seven magnetoresistive elements 31 to 37 are used as values of four data bits in the Hamming code and three check bits in the same Hamming code. Assigned. The first to third check bits C1 to C3 and the first to fourth data bits D1 to D4 are assigned so that the relationships shown in the following equations (6) to (8) are established. ing.

本実施の形態では、第１〜第４磁気抵抗素子３１〜３４から出力される二値化信号Ｓ１〜Ｓ４を、それぞれ第１〜第４データビットＤ１〜Ｄ４に割り当てている。また、第５〜第７磁気抵抗素子３５〜３７から出力される二値化信号Ｓ５〜Ｓ７を、それぞれ第１〜第３チェックビットＣ１〜Ｃ３に割り当てている。なお、第１〜第４データビットＤ１〜Ｄ４が、マグネット２３の位置情報である位置符号に相当し、第１〜第３チェックビットＣ１〜Ｃ３が、マグネット２３の位置に対する二値化信号の組み合わせの１つの誤りを訂正するための誤り訂正符号に相当する。

In the present embodiment, the binarized signals S1 to S4 output from the first to fourth magnetoresistive elements 31 to 34 are assigned to the first to fourth data bits D1 to D4, respectively. Also, the binarized signals S5 to S7 output from the fifth to seventh magnetoresistance elements 35 to 37 are assigned to the first to third check bits C1 to C3, respectively. The first to fourth data bits D1 to D4 correspond to position codes that are position information of the magnet 23, and the first to third check bits C1 to C3 are combinations of binarized signals with respect to the position of the magnet 23. This corresponds to an error correction code for correcting one error.

  By the way, the error correction capability of the above-described Hamming code is 1, and when the received code Y has a 2-bit error, the error cannot be corrected. For this reason, when there are two errors in the combination of the input binarized signals S1 to S7, the error in the combination of the input binarized signals S1 to S7 cannot be corrected accurately.

  In the present embodiment, the controller 39 detects that the combination of the input binarized signals S1 to S7 is a combination of normal binarized signals corresponding to the positions P2, P4, P5, and P6 of the magnet 23. It is determined whether or not a combination of binarized signals having an error of one binarized signal. When the combination of the input binarized signals S1 to S7 is a combination of binarized signals having one error with respect to the normal binarized signal combination corresponding to the position of the magnet 23, the controller 39 corrects (inverts) the errors of the binarized signals S1 to S7 based on the error signal position information generated based on the combination of the input binarized signals S1 to S7. Then, the controller 39 detects the position of the shift lever 3 based on the corrected combination of the binarized signals S1 to S7, and switches the connection state of the automatic transmission based on the detection result. When the combination of the input binarized signals S1 to S7 is not a combination of binarized signals having one error with respect to the normal binarized signal combination corresponding to the position of the magnet 23, the controller 39 determines that the error signal position cannot be determined. Then, the controller 39 switches the connection state of the automatic transmission to neutral, and operates the vehicle to the safe side. Whether the combination of the input binarized signals S1 to S7 is a combination of binarized signals having one error with respect to the normal binarized signal combination corresponding to the position of the magnet 23 2 Even when it is not possible to determine whether the combination is a binary signal having two errors, the controller 39 determines that the error signal position cannot be determined. Then, the controller 39 switches the connection state of the automatic transmission to neutral, and operates the vehicle to the safe side. That is, when the combination of the input binarized signals S1 to S7 is a combination of binarized signals having two errors with respect to the normal binarized signal combination corresponding to the position of the magnet 23, The combination of the input binarized signals S1 to S7 will not be erroneously corrected.

Next, a procedure for detecting (determining) the position of the shift lever 3 (magnet 23) by the operation position detecting device 20 configured as described above will be described with reference to the flowchart shown in FIG.
First, when the controller 39 receives the binarized signals S1 to S7 from the first to seventh magnetoresistive elements 31 to 37, in step 101, the controller 39 outputs the binarized signals output from the magnetoresistive elements 31 to 37. An XOR (exclusive OR) operation is performed on the combination and the check matrix H (check matrix transposed matrix H ^T ) stored in advance in the memory 39a to obtain a syndrome (see FIG. 20). If the syndrome is zero vector (0, 0, 0) in step 101, the controller 39 determines that there is no error in the combination of the binarized signals S1 to S7, and proceeds to step 102. In step 102, the controller 39 determines the position of the magnet 23 based on the combination of the binarized signals S1 to S7 output from the magnetoresistive elements 31 to 37. And the controller 39 switches the connection state of the automatic transmission of the vehicle which is not shown based on the determination result (detection result).

  On the other hand, if the syndrome is not a zero vector in step 101, the controller 39 proceeds to step 103, where the combination of the input binarized signals S1 to S7 is a normal binary corresponding to each position of the magnet 23. It is determined whether or not the combination of the binarized signals having a single (one) binarized signal error with respect to the combination of the binarized signals.

  Specifically, as shown in FIG. 17, the memory 39 a of the controller 39 stores one binary for each combination of normal binarization signals corresponding to the positions P2, P4, P5, and P6 of the magnet 23. A single value of a combination of a binary signal corresponding to each position P2, P4, P5, and P6 of the magnet 23, and a value associated with a binary signal combination having a single signal error (single error) An error signal position, that is, a determination table 41 associated with the magnetoresistive elements 31 to 37 outputting an incorrect signal is stored. The values in the determination table 41 are calculated by substituting the values of the binarized signals S1 to S7 from the magnetoresistive elements 31 to 37 into the following equation (9). The value calculated from Equation (9) is called a weighting value. This weighting value corresponds to error signal position information.

なお、図１８に、全ての磁気抵抗素子３１〜３７が正常に動作している場合の二値化信号Ｓ１〜Ｓ７の組み合わせから算出される重み付け値と、各磁気抵抗素子から出力される二値化信号Ｓ１〜Ｓ７のうち何れか１つの値が反転した場合の重み付け値とを、シフトレバー３の位置毎に場合分けしたものを示す。なお、図１８では、第１〜第７磁気抵抗素子３１〜３７をそれぞれ「ＭＲ１」〜「ＭＲ７」という文字で表記している。

FIG. 18 shows weight values calculated from combinations of the binarized signals S1 to S7 when all the magnetoresistive elements 31 to 37 are operating normally, and binary values output from the magnetoresistive elements. The weighting value when any one value of the conversion signals S <b> 1 to S <b> 7 is inverted is shown for each position of the shift lever 3. In FIG. 18, the first to seventh magnetoresistive elements 31 to 37 are indicated by letters “MR1” to “MR7”, respectively.

  The controller 39 substitutes the values of the input binarized signals S1 to S7 into the above-described equation (9), and the weight values calculated from the input binarized signals S1 to S7 are stored in the memory 39a. It is determined whether it is included in the weighting value of the determination table 41.

  If the calculated weighting value is not included in the weighting values stored in the memory 39a, the controller 39 binarizes the combination of the input binarized signals S1 to S7 with two errors. It is determined that the combination of the signals S1 to S7, that is, the combination of the binarized signals S1 to S7 corresponding to the position of the magnet 23 is not a combination of the single error binarized signals S1 to S7. 104. In step 104, the controller 39 determines that the error of the combination of the binarized signals S1 to S7 cannot be corrected. Further, the controller 39 notifies the fact through a notifying device (not shown), switches the connection state of the automatic transmission to neutral, and ends this processing.

  On the other hand, when the weighted value calculated in step 103 is included in the weighted value stored in the memory 39a, the controller 39 determines that the combination of the input binarized signals S1 to S7 is the position of each magnet 23. It is determined that the combination of the binarized signals corresponding to is not a binarized signal having two binarized signal errors, that is, one error, and the process proceeds to step 105.

  Next, in step 105, the controller 39 determines that the combination of the input binarized signals S <b> 1 to S <b> 7 is two binarized signals with respect to the normal binarized signal combination corresponding to each position of the magnet 23. It is determined whether or not the combination corresponds to a combination of binarized signals having the error (1).

  Specifically, for example, in a state where the shift lever 3 is operated to the neutral position N, output from one magnetoresistive element (for example, the third magnetoresistive element 33) due to failure or noise of the magnetoresistive elements 31 to 37. When the value of the binarized signal is inverted, the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are originally “0” “1” “1” “1” “0” “1” “0” “1” “1” “0” “0”. In this case, the weighting value is “26”. On the other hand, in a state where the shift lever 3 is operated to the drive position D, two magnetoresistive elements (for example, the fifth magnetoresistive element 35 and the seventh magnetoresistive element 37) are caused by a failure or noise of the magnetoresistive elements 31 to 37. When the value of the binarized signal output from the first to seventh magnetoresistive elements 31 to 37 is inverted, the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are originally “0” “1” “0”. Where “1” “0” “0” “1”, “0” “1” “0” “1” “1” “0” “0”. Also in this case, the weighting value is “26”. That is, the weighting value corresponding to the combination of the single error binarized signals stored in the memory 39a is the combination of the binarized signals having two errors as shown in parentheses in FIG. Also include corresponding weighting values. In step 105, if the weighted values of the input binarized signals S1 to S7 do not match the weighted values corresponding to the combination of the two binarized signals having two errors, the controller 39 inputs the input binary signal. A combination of the binarized signals S1 to S7 corresponds to a combination of binarized signals having errors of two binarized signals with respect to a normal binarized signal combination corresponding to each position of the magnet 23. If not, the process proceeds to step 106.

  In step 106, the controller 39 specifies the error signal position of the combination of the binarized signals S1 to S7 inputted based on the calculated weighting value and the determination table 41, and the binary of the specified signal position. The correction signals S1 to S7 are corrected. For this reason, weighting values (error signal position information) corresponding one-to-one to combinations of binarized signals having errors in one binarized signal with respect to combinations of binarized signals corresponding to each position of the magnet 23. Based on the above, the error signal position of the combination of the binarized signals S1 to S7 is specified, and the binarized signals S1 to S7 at the specified signal position are corrected. Then, the controller 39 determines the position of the magnet 23 based on the corrected combination of binarized signals. And the controller 39 switches the connection state of the automatic transmission of the vehicle which is not shown in figure to the connection state according to the position of the magnet 23, and complete | finishes this process.

  On the other hand, in step 105, when the weighted values of the input binarized signals S1 to S7 coincide with the weighted values corresponding to the combination of the binarized signals having two errors, the controller 39 receives the input two-valued signal. A combination of the binarized signals S1 to S7 corresponds to a combination of binarized signals having errors of two binarized signals with respect to a normal binarized signal combination corresponding to each position of the magnet 23. And the process proceeds to step 104. In step 104, the controller 39 determines that the error of the combination of the binarized signals S1 to S7 cannot be corrected. Further, the controller 39 notifies the fact through a notifying device (not shown), switches the connection state of the automatic transmission to neutral, and ends this processing.

  As described above, in the present embodiment, it is possible to detect the positions of the seven magnets 23 (P1 to P7). For this reason, by selecting the position of the magnet 23 corresponding to the operation position in accordance with the operation pattern of the shift lever 3 from among these seven places (P1 to P7), only the T type as in the present embodiment can be obtained. Not limited to this, a plurality of types of operation patterns such as h-type, H-type, and cross shape can be handled.

Next, the operation of the shift device 1 configured as described above will be described.
First, it is assumed that the magnetoresistive elements 31 to 37 are operating normally in a state where the shift lever 3 is held at the neutral position T. In this case, as shown in FIG. 20, the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are “0” “0” “1” “1” “0” “ 1 ”and“ 0 ”, and a syndrome generated based on the combination of the binarized signals S1 to S7 is a zero vector (0, 0, 0). In this case, the controller 39 determines the position of the magnet 23 based on the combination of the binarized signals S1 to S7, and switches the connection state of the automatic transmission of the vehicle (not shown).

  Next, it is assumed that one magnetoresistive element (for example, the third magnetoresistive element 33) has failed in a state where the shift lever 3 is held at the neutral position T. In this case, as shown in FIG. 21, the binarized signals S1 to S7 output from the first to seventh magnetoresistance elements 31 to 37 are “0” “0” “0” “1” “0” “ 1 ”and“ 0 ”, and the syndrome generated based on the combination of the binarized signals S1 to S7 is (1, 0, 1) and is not a zero vector. Therefore, the weighting value based on the above-described equation (9) ( “40”) is calculated. This weighted value (“40”) is included in the weighted value of the binarized signal (see FIG. 17) stored in the memory 39a and is a combination of binarized signals having one binarized signal error. Therefore, the controller 39 specifies the error signal position of the combination of the binarized signals S1 to S7 based on the weighted value and the determination table 41 (here, the first value). 3) The binary signal S3 output from the magnetoresistive element 33) and the value (bit) at that position are inverted (here, “0” → “1”). Thereby, the binarized signal S3 of the third magnetoresistive element 33 is corrected. Then, the controller 39 determines the position of the magnet 23 based on the corrected binary signal combination, switches the connection state of the automatic transmission, and one magnetoresistive element breaks down through a not-shown notification device. Notify that you are doing. For this reason, if one magnetoresistive element fails, that is, if there is a single error, the position of the magnet 23 can be correctly determined. Therefore, even when one magnetoresistive element fails, the detection of the position of the shift lever 3 can be continued.

  Here, it is assumed that the shift lever 3 is operated to the neutral position N in a state where one magnetoresistive element (for example, the third magnetoresistive element 33) is out of order. In this case, as shown in FIG. 22, the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are “0” “1” “0” “1” “1” “ 0 ”and“ 0 ”, and the syndrome generated based on the combination of the binarized signals S1 to S7 is (1, 0, 1) and is not a zero vector, so the weighting value based on the above-described equation (9) ( “26”) is calculated. This weighted value (“26”) is included in the weighted value (see FIG. 17) of the binarized signal stored in the memory 39a, but a combination of binarized signals having one binarized signal error. Therefore, the controller 39 determines that the error position cannot be determined, notifies the fact through a notification device (not shown), and indicates the connection state of the automatic transmission. A control signal for switching to neutral is output to the automatic transmission, and the connection state of the automatic transmission is switched to neutral.

  Next, it is assumed that two magnetoresistive elements (for example, the third magnetoresistive element 33 and the sixth magnetoresistive element 36) have failed in a state where the shift lever 3 is held at the neutral position T. In this case, as shown in FIG. 23, the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 are “0” “0” “0” “1” “0” “ 0 ”and“ 0 ”, and the syndrome generated based on the combination of the binarized signals S1 to S7 is (1, 1, 1) and is not a zero vector, so the weighting value based on the above-described equation (9) ( “8”) is calculated. Since this weighting value (“8”) is not included in the weighting value of the binarized signal (see FIG. 17) stored in the memory 39a, the controller 39 determines that the error position cannot be determined, and A notification signal is sent to the automatic transmission, and a control signal for switching the connection state of the automatic transmission to neutral is output to the automatic transmission to switch the connection state of the automatic transmission to neutral. For this reason, when the binarized signals from the two magnetoresistive elements 31 to 37 are inverted due to a failure, the shift device 1 operates on the safe side.

Next, the operational effects of the above embodiment will be described below.
(1) Based on the combination of the binarized signals output according to the direction of the magnetic field acting on the detection surfaces of the plurality of magnetoresistive elements 31 to 37, which of the plurality of predetermined positions the magnet 23 is in Detected. Since the plurality of magnetoresistive elements 31 to 37 are provided along a plane (moving plane Q) intersecting with the magnetizing direction of the magnet 23, the operation position detecting device 20 in the shift device 1 can be concentrated. That is, unlike the prior art, it is not necessary to separately provide a detection target (for example, the magnet 9) corresponding to each direction. Accordingly, the shift device 1 can be downsized. 37 are arranged so that the combination of the binarized signals output from them conforms to the Hamming code, and this corrects the error in the combination of the binarized signals with respect to the position of the magnet 23. At that time, the controller 39 determines that the combination of the binarized signals S1 to S7 output from the first to seventh magnetoresistive elements 31 to 37 is a normal binarized signal corresponding to each position of the magnet 23. It is determined whether or not the combination is a combination of binarized signals having an error of one binarized signal, and the controller 39 outputs the binarized signals S1 to S1. When the combination of 7 is a combination of the binarized signals having one error with respect to the normal binarized signal combination corresponding to the position of the magnet 23, the combination of the output binarized signals S1 to S7 Based on the error signal position information (weighting value) generated based on the error, the combination error of the binarized signals S1 to S7 with respect to the position of the magnet 23 is corrected. Based on the error signal position information corresponding one-to-one to the error signal of the combination, the combination error of the binarized signals S1 to S7 with respect to the position of the magnet 23 is corrected. When the binarized signal output from one magnetoresistive element 31 to 37 has been changed (inverted) due to 37 failure or noise, etc. Then, the change in the binarized signal is corrected, and the controller 39 can accurately detect the position of the magnet 23. That is, the binarized signal S1 output from one magnetoresistive element 31-37. Therefore, it is possible to secure redundancy for the error of S7, so that by using this operation position detection device 20, it is possible to reduce the size while ensuring redundancy for failure of one sensor element and detection reliability of the shift device 1. Can be achieved.

  (2) Since the position of the magnet 23 can be accurately detected even when one of the magnetoresistive elements 31 to 37 fails, the detection of the position of the shift lever 3 can be continued. Therefore, even if one of the magnetoresistive elements 31 to 37 fails, the vehicle can continue to travel. For example, if each rotation detection sensor is simply provided with three sensor elements, it is possible to correct an error of one binarized signal by majority logic. In this case, however, enlargement of each sensor physique can not deny.

  (3) Since two errors in the combination of the binarized signals with respect to the position of the magnet 23 can be detected, it is detected from this that the two magnetoresistive elements 31 to 37 have failed. Can do. Therefore, when two of the seven magnetoresistive elements 31 to 37 fail, the vehicle can be immediately operated to the safe side.

  (4) Since a plurality of magnetoresistive elements 31 to 37 are provided along the shift direction and the select direction, respectively, the positions of the magnets 23 at a plurality of locations along the shift direction can be detected, and the select direction It is possible to detect the positions of the magnets 23 at a plurality of locations along the line. Therefore, it is possible to set the operation position of the shift lever 3 corresponding to the position of the magnet 23 at a plurality of locations in the shift direction and the selection direction, and by selecting the operation position according to the operation pattern of the shift lever 3 A plurality of types of operation patterns can be handled. Therefore, versatility is improved.

  (5) The first to third magnetoresistive elements 31 to 33 of the first magnetic sensor module 24 and the fourth to seventh magnetisms of the second magnetic sensor module 25 as viewed from the direction orthogonal to the moving plane Q of the magnet 23. Since the resistance elements 34 to 37 are arranged so as to overlap with each other, the operation position detection device 20 in the direction along the moving plane Q can be reduced in size.

In addition, you may change this Embodiment as follows.
In the above embodiment, the fourth to seventh magnetoresistive elements 34 to 37 of the second magnetic sensor module 25 are positive or negative of the detection signals of the first to third magnetoresistive elements 31 to 33 of the first magnetic sensor module 24. 1 is output so that the combination of the binarized signals can be provided so as to conform to at least the Hamming code, the first to seventh magnetoresistive elements 31 to 31 are provided. The detection characteristics and arrangement with respect to the direction of the magnetic flux 37 can be changed as appropriate.

  In the above embodiment, the binarized signals S1 to S7 from the first to seventh magnetoresistive elements 31 to 37 are arranged as shown in the table of FIG. 15, but the order of the binarized signals S1 to S7 is These can be changed as appropriate.

  In the above embodiment, the magnet 23 formed in a substantially columnar shape is used, but the shape of the magnet 23 is not limited to such an aspect. For example, a magnet formed in a cross shape, a diamond shape, or a square shape may be used.

  In the above embodiment, the three or four magnetoresistive elements 31 to 33 and 34 to 37 are integrally configured as one package, but the seven magnetoresistive elements 31 to 33 and 34 to are individually packaged. 37 may be used.

In the above embodiment, the magnetoresistive elements 31 to 33 and 34 to 37 are provided on the front side and the back side of the substrate 30, but may be arranged on the same plane.
In the above embodiment, the magnetoresistive elements 31 to 33 and 34 to 37 are arranged so that the distance between them is constant. However, the present invention is not limited to such an embodiment, and can be appropriately changed according to the shift pattern. Also good.

  In the above embodiment, when the shift lever 3 is in the neutral position N, the center M of the magnet 23 and the center position of the magnetic sensor modules 24 and 25 are provided so as to coincide with each other. For example, when the shift lever 3 is in the neutral position T, the center M of the magnet 23 and the center positions of the magnetic sensor modules 24 and 25 may be provided to coincide with each other.

In the above embodiment, the magnet 23 is magnetized in the direction orthogonal to the moving plane Q. However, as long as the magnet 23 is magnetized in the direction intersecting the moving plane Q, it does not necessarily have to be orthogonal to the moving plane Q.
In the above embodiment, the magnetic sensor module 24 side of the magnet 23 is the S pole and the opposite side is the N pole, but it may be magnetized in the opposite direction.

In the above embodiment, the magnetic sensor module 24 is fixed to the slider 22, but is not limited to such a mode, and may be fixed to the case 7, for example.
In the above embodiment, the weighting value (see FIG. 17) calculated based on the above-described equation (9) is stored in the memory 39a. However, the present invention is not limited to this mode. For example, a single error binarized signal combination itself (see FIG. 18) having one binarized signal error with respect to the binarized signal combination corresponding to the position of the magnet 23 is stored in the memory 39a. May be. In this case, the combination of the input binarized signals S1 to S7 is compared with the combination of the binarized signals stored in the memory 39a, and the input binarized signal is based on the comparison result. It is determined whether or not the combination of S1 to S7 is a combination of binarized signals having an error of one binarized signal with respect to the combination of binarized signals corresponding to each position of the magnet 23.

  In the above embodiment, the error signal position is identified based on the weighted values calculated from the input binarized signals S1 to S7 in step 106, but the present invention is not limited to such an aspect. For example, a syndrome table in which a syndrome and a single error signal position of a combination of binarized signals corresponding to the positions P1 to P7 of the magnet 23 are associated is stored in the memory 39a, and the input binarized signal The error signal position may be specified based on the syndrome obtained from S1 to S7.

In the above-described embodiment, the shift device 1 is embodied in the T-type shift pattern. However, the shift pattern may be embodied in, for example, the shift device 1 in which the shift pattern is h-type, H-type, or cross-shaped.
In the above embodiment, the parking switch 3b is provided on the shift lever 3 of the shift device 1. However, for example, a parking switch may be provided on the instrument panel or the like.

  In the above embodiment, the column shift device is embodied. However, the present invention may be embodied in a floor shift device, a shift device provided in a center console, an instrument panel, or the like. Moreover, you may materialize in the input device corresponding to various vehicle equipment other than the shift apparatus 1, and the input device corresponding to apparatuses other than vehicle equipment.

Next, the technical idea that can be grasped from the embodiment will be described below.
(A) The arithmetic means calculates two of the combinations of the binarized signals for each predetermined position of the detected object based on the error signal position information generated based on the combination of the output binarized signals. The operation position detection device according to claim 1, wherein an error in two binarized signals is detected. According to the present invention, it is possible to detect two errors in the combination of binarized signals. From this, it is possible to detect that two magnetic detection means have failed.

The perspective view which shows the arrangement | positioning aspect of a shift apparatus. The schematic diagram which shows schematically the relationship between a shift gate and a shift position. The schematic perspective view of a shift apparatus. The top view which looked at the shift apparatus main body from the vehicle front side. Sectional drawing of a part of shift apparatus main body. EE sectional view taken on the line of FIG. FF sectional view taken on the line of FIG. GG sectional view taken on the line of FIG. The enlarged view of a part of shift device main body. Sectional drawing for demonstrating operation | movement of a shift apparatus. Sectional drawing for demonstrating operation | movement of a shift apparatus. (A) is a top view of a magnetic sensor module, (b) is a side view for demonstrating the positional relationship of a magnet and a magnetic sensor module. The block diagram which shows the electric constitution of a shift apparatus. The top view for demonstrating the effect | action of an operation position detection apparatus. Explanatory drawing which shows the relationship between the position of a magnet, and the combination of the electric signal output from each magnetoresistive element. Explanatory drawing for demonstrating a Hamming code | symbol. Explanatory drawing which shows the relationship between the weighting value calculated from the combination of a binarized signal, and the error signal position of the combination of a binarized signal. Explanatory drawing which shows the relationship between the combination of a binarized signal, and the weighting value calculated from the combination of this binarized signal. The flowchart for demonstrating the procedure which detects the position of a shift lever. Explanatory drawing for demonstrating an effect | action when the detection signal of the appropriate value according to the position of a magnet is output. Explanatory drawing for demonstrating an effect | action when the combination of the binarization signal which has one error with respect to the combination of the binarization signal corresponding to the position of a magnet is output. Explanatory drawing for demonstrating an effect | action when the combination of the binarization signal which has one error with respect to the combination of the binarization signal corresponding to the position of a magnet is output. Explanatory drawing for demonstrating an effect | action when the combination of the binarization signal which has two errors with respect to the combination of the binarization signal corresponding to the position of a magnet is output.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Shift apparatus, 3 ... Shift lever as operation member, 6 ... Shift gate, 20 ... Operation position detection apparatus, 23 ... Magnet as to-be-detected body, 31-37 ... 1st-8th magnetism as magnetic detection means Resistance element 39... Controller as arithmetic means, 39 a. Memory as storage means, P 1 to P 7... Position, Q... Moving plane, S 1 to S 7.

Claims (6)

A detected body that is provided so as to be movable between a plurality of predetermined positions in accordance with the operation of the operation member and is magnetized in a direction crossing the moving direction;
A plurality of magnetic detection means provided along a plane intersecting the magnetization direction and outputting a binarized signal corresponding to the direction of magnetic flux respectively applied according to the position of the detected object;
A calculation means for obtaining the position of the detected object based on a combination of binarized signals output from a plurality of the magnetic detection means,
The plurality of magnetic detection means includes a combination of the binarized signals, a position code that is position information of the detected object, and a combination of the binarized signals unique to each predetermined position of the detected object. Provided to be compliant with a Hamming code including an error correction code for correcting an error of two binarized signals,
The arithmetic unit is configured to binarize a combination of binarized signals output from the plurality of magnetic detection units with respect to a normal binarized signal combination corresponding to each predetermined position of the detected object. It is determined whether or not a combination of binarized signals having a signal error, and the combination of the output binarized signals is a normal binarized signal combination corresponding to the position of the detected object. Combination of the binarized signals corresponding to each predetermined position of the detected object generated based on the combination of the output binarized signals in the case of a combination of binarized signals having one error The error signal position of the combination of the binarized signals is specified based on the error signal position information corresponding one-to-one with the error signal, and the binarized signal at the specified signal position is corrected. Characteristic operation置検 detection device. By adding the weighted signals according to the magnetic detection means corresponding to the binarized signals, one binarized signal is obtained for a normal binarized signal combination corresponding to the position of the detected object. By adding the first weighted value associated only with the combination of the binarized signals having an error and the weighted signal corresponding to the magnetic detection means corresponding to the binarized signal, the detected object A normal binarization signal corresponding to a position of the detected object, and a combination of binarization signals having an error of one binarization signal with respect to a combination of normal binarization signals corresponding to the position Storage means for storing a second weighting value associated with a combination of binarized signals that is also a combination of binarized signals having an error of two binarized signals with respect to the combination of
The computing means calculates a weighted value by adding the weighted binarized signals output from the plurality of magnetic detecting means according to the corresponding magnetic detecting means, and the calculated weighted value In the case of a weighting value of 1, the combination of the output binarized signals is a combination of binarized signals having one error with respect to the binarized signal combination corresponding to the position of the detected object. The operation position detection device according to claim 1, wherein the operation position detection device is determined to be present. A combination of binarized signals having an error of one binarized signal with respect to a combination of normal binarized signals corresponding to the position of the detected object, and a normal binary corresponding to the position of the detected object A combination of binarized signals having an error of one binarized signal with respect to the combination of binarized signals and two combinations of normal binarized signals corresponding to the position of the detected object Storage means for storing a binary signal combination that is also a combination of binary signals having an error in the binary signal;
The arithmetic means binarizes the combination of the output binarized signals having an error of one binarized signal with respect to the normal binarized signal combination corresponding to the position of the detected object. In the case of a combination of signals, the output binarized signal combination is an error of one binarized signal with respect to a normal binarized signal combination corresponding to each predetermined position of the detected object. The operation position detection device according to claim 1, wherein the operation position detection device is determined to be a combination of binarized signals having the following. The detected object is provided to be movable in a first direction and a second direction orthogonal to the first direction,
4. The operation position detection device according to claim 1, wherein a plurality of the magnetic detection units are provided along the first direction and the second direction, respectively. 5.   5. The plurality of magnetic detection units include two magnetic detection units arranged so as to overlap each other when viewed from the magnetization direction of the detected object. Operation position detection device. An operation member that is operated at a plurality of operation positions set along the shift gate, and an operation position detection device that detects an operation position of the operation member, and based on a detection result of the operation position detection device, A shift device for switching a connection state of a transmission,
A shift device comprising the operation position detection device according to claim 1.

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