JP5062211B2 - Operation amount detection device - Google Patents

Description

  The present invention relates to an operation amount detection device that detects an operation amount that is transmitted to an operation target member by converting a rotation operation of an operation member such as a brake pedal into a linear operation of an operation rod.

  For example, as a braking device for a vehicle, a braking force by a braking device, that is, a braking hydraulic pressure supplied to a wheel cylinder that drives the braking device is electrically generated according to an operation amount (pedal stroke, pedaling force, etc.) input from a brake pedal. An ECB (Electronically Controlled Brake) is known as an electronically controlled brake device that is controlled in a controlled manner.

  This ECB stores the hydraulic pressure boosted by the pump in an accumulator, and controls the pressure according to the driver's braking request and supplies it to the wheel cylinder as the braking hydraulic pressure. That is, when the driver depresses the brake pedal, the master cylinder generates a hydraulic pressure corresponding to the operation amount, and a part of the hydraulic oil flows into the stroke simulator, and the operation amount of the brake pedal corresponding to the depression force of the brake pedal is reduced. On the other hand, the brake ECU sets the target deceleration of the vehicle according to the pedal stroke, determines the braking force distribution to be applied to each wheel, and applies a predetermined hydraulic pressure from the accumulator to each wheel cylinder. ing.

  In such an electronically controlled brake device, it is necessary to detect an operation amount (pedal stroke, pedal effort, etc.) input from the brake pedal with high accuracy. Conventional brake pedal operation amount detection devices include those described in Patent Documents 1 and 2 below.

  The operation force related signal output device described in Patent Document 1 is a rotating member that rotates around a single axis perpendicular to the axis of the input rod by relative movement between the brake operating member and the input rod. The brake operation member and the input rod are urged by the elastic member in directions away from each other in the axial direction of the input rod, and are operated by the relative movement between the brake operation member and the rotation member. A signal output device that outputs a signal related to force is provided. In addition, the brake operation force detection device described in Patent Document 2 holds a detector that can be moved relative to the main body of the device, and detects the load from the detector in mechanical association with the detector. And the ratio of the output of the load detector to the amount of movement of the detector is small when the amount of movement of the detector is large. A non-linear characteristic imparting device that makes the state smaller than the state is provided.

Japanese Patent No. 3453507 JP 2001-018768 A

  The conventional brake pedal operation amount detection device described above requires a rotation lever for transmitting the operation force of the brake operation member to the detector, and the rotation lever can be detected by a load limiting mechanism or the like. A mechanism for taking out only the necessary load is also required. This complicates the structure of the detection mechanism, the load limiting mechanism, etc., and increases the manufacturing cost. In addition, there is a problem that the maintainability deteriorates due to the complicated structure.

  The present invention is intended to solve such a problem, and provides an operation amount detection device that can reduce the manufacturing cost while simplifying the structure and configuring the load limiting function. Objective.

  In order to solve the above-described problems and achieve the object, the operation amount detection device of the present invention detects the operation amount transmitted to the operation target member by converting the rotation operation of the operation member into the linear operation of the operation rod. In the operation amount detection device, the operating shaft and the connecting shaft that connects the operating rod, and the convex portion of the operating member that is separated in a direction that one side intersects the axial direction of the operating rod with respect to the connecting shaft And an elastic member whose other side is connected to the connecting shaft, and a detection unit that detects an elastic deformation amount of the elastic member and outputs it as an operation amount. .

  In the operation amount detection device of the present invention, the elastic member is connected to the connection shaft with the intermediate portion in the longitudinal direction as the other side, and each end portion in the longitudinal direction contacts the convex portion of the operation member as the one side. It is characterized by being supported.

  In the operation amount detection device of the present invention, a biasing member that biases the operation member and the elastic member toward each other is provided.

  In the operation amount detection device of the present invention, a restriction portion that restricts relative movement in the longitudinal direction between the elastic member and the operation member is provided at an end of the elastic member or a convex portion of the operation member. Yes.

  In the operation amount detection device of the present invention, a mover is fixed to the elastic member, and the mover is connected so as to be movable relative to the axial direction of the connection shaft and the operation rod.

  In the operation amount detection device of the present invention, a restricting portion that restricts a relative movement amount between the mover and the connecting shaft is provided.

  In the operation amount detection device of the present invention, a strain sensor as the detection unit is provided between the connecting shaft and the convex portion in the elastic member.

  According to the operation amount detection device of the present invention, the connecting shaft that connects the operating member and the operating rod, and the convex portion of the operating member that is spaced apart in the direction in which one side intersects the axial direction of the operating rod with respect to the connecting shaft. An elastic member that is supported in contact and has the other side connected to the connecting shaft, and a detection unit that detects an elastic deformation amount of the elastic member and outputs it as an operation amount are provided. Therefore, the structure can be simplified and the manufacturing cost can be reduced, while the load limiting function can be configured.

FIG. 1 is a front view of an essential part of the operation amount detection device according to the first embodiment of the present invention with a part cut away. 2 is a cross-sectional view taken along the line II-II in FIG. 1 illustrating the structure of the connecting portion in the manipulated variable detection device according to the first embodiment. FIG. 3 is a front view illustrating the overall configuration of the operation amount detection device according to the first embodiment. FIG. 4 is a front view of an essential part of the manipulated variable detection device according to the second embodiment of the present invention, partly cut away.

  Embodiments of an operation amount detection device according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a front view of an essential part of a manipulated variable detection device according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a structure of a connecting portion in the manipulated variable detection device according to the first embodiment. II-II sectional drawing of FIG. 3, FIG. 3 is a front view showing the whole structure of the operation amount detection apparatus of Example 1. FIG.

  In the operation amount detection device of the first embodiment, as shown in FIG. 3, the brake pedal 11 as an operation member is suspended by a rotation shaft 13 on a mounting bracket 12 whose upper end is fixed to a vehicle body (not shown). A pedal 14 that is supported by being lowered and that can be depressed by an occupant is mounted at the lower end. On the other hand, the operating rod 15 is connected to a master cylinder and a brake booster (not shown) as an operation target member whose operation is to control the operation of a brake device (not shown).

  The operation rod 15 is screwed into the clevis 16 at the base end and is prevented from loosening by the lock nut 17. The clevis 16 has bifurcated portions 16a and 16b (see FIG. 2). The bifurcated portions 16a and 16b are located at both sides of the intermediate portion of the brake pedal 11 with a predetermined interval, and the connecting shaft 18 is braked. By passing through the pedal 11 and the bifurcated portions 16a and 16b, the pedal 11 and the bifurcated portions 16a and 16b are connected to each other so as to be rotatable.

  Therefore, when the occupant steps on the brake pedal 11, the brake pedal 11 rotates through the rotation shaft 13, and the operation amount (operation force) is transmitted to the operation rod 15 through the connecting shaft 18 and the clevis 16. Thus, the operating rod 15 moves in the axial direction, and the brake booster and the master cylinder can be operated.

  The operation amount detection device according to the first embodiment converts the rotation operation of the brake pedal 11 into a linear operation of the operation rod 15 and transmits the brake pedal stroke (or brake pedal depression force) as the operation amount transmitted to the master cylinder and the brake booster. ) Is detected. In the first embodiment, the operation amount detection unit 20 can be mounted as one module on the brake pedal 11 described above.

  Here, the operation amount detection unit 20 will be described in detail.

  As shown in FIGS. 1 and 2, in the operation amount detection unit 20, the clevis 16 to which the operation rod 15 is connected has bifurcated portions 16 a and 16 b on both sides in the plate thickness direction at the intermediate portion of the brake pedal 11. The connecting holes 16c and 16d are formed in the bifurcated portions 16a and 16b, respectively, and the connecting hole 11a is formed in the brake pedal 11. The connecting shaft 18 having the head portion 18a passes through the connecting holes 16c and 16d and the connecting hole 11a from one side of the bifurcated portions 16a and 16b, and the clip 18b is locked to the tip portion to prevent the connecting shaft 18 from coming off. Has been.

  The elastic member 21 is made of metal or synthetic resin, has a predetermined thickness, has a predetermined length along the longitudinal direction of the brake pedal 11, and is configured to be elastically deformable by a predetermined load. The elastic member 21 includes a main body 22 having a plate shape extending along the longitudinal direction of the brake pedal 11 on the front end side of the brake pedal 11, and an intermediate portion of the main body 22 in the longitudinal direction from the brake pedal 11. It is comprised from a pair of lever parts 23a and 23b bent at a substantially right angle so that each plane part may be followed.

  In this embodiment, the elastic member 21 has an upper end portion and a lower end portion on one side of the present invention, an intermediate portion on the other side of the present invention, and a lever portion 23a as a mover of the present invention in the intermediate portion. , 23b are integrally provided. In this case, the elastic member 21 is configured such that the main body portion 22 and the lever portions 23a and 23b are integrated by pressing one plate material or the like, but the lever having a U-shape is formed on the main body portion having a flat plate shape. The elastic member may be constituted by another member by joining the parts by bolts or welding.

  The lever portions 23a and 23b in the elastic member 21 are located at predetermined intervals on both sides of the brake pedal 11 in the plate thickness direction. The connecting shaft 18 penetrates the support holes 24a and 24b of the lever portions 23a and 23b together with the bifurcated portions 16a and 16b of the clevis 16 and the connecting hole 11a of the brake pedal 11, so that the clevis 16 and the brake pedal 11 are elastic. The member 21 is connected so as to be relatively rotatable.

  The main body 22 of the elastic member 21 has end portions 22a and 22b extending upward and downward in the longitudinal direction of the brake pedal 11 with respect to the lever portions 23a and 23b. On the other hand, on the front end side of the brake pedal 11, convex portions 25 and 26 are integrally formed so as to be opposed to the end portions 22 a and 22 b of the main body portion 22 in the elastic member 21. Further, a resin clip 27 as an urging member is installed between the brake pedal 11 and the elastic member 21, and the elastic member 21 is urged by the urging force (elastic force) of the clip 27. Energized and supported in the direction of approaching.

  The clip 27 has a U-shape and is disposed so as to straddle the rear end side of the brake pedal 11, and locking portions 27 a and 27 b formed at the respective end portions are formed on the lever portions 23 a and 23 b of the elastic member 21. The locking holes 28a and 28b are locked. Therefore, the elastic member 21 is urged toward the brake pedal 11 by the urging force of the clip 27, and the end portions 22 a and 22 b of the main body portion 22 abut (contact) the convex portions 25 and 26 of the brake pedal 11. And is supported.

  In this case, the elastic member 21 is separated in a direction (longitudinal direction of the brake pedal 11) in which the upper end portion and the lower end portion (one side) intersect (orthogonal) the axial direction of the operation rod 15 with respect to the connecting shaft 18. The brake pedal 11 is supported in contact with the convex portions 25 and 26, and the other side (intermediate portion) is connected to the connecting shaft 18. Further, the elastic member 21 is integrally provided with lever portions 23 a and 23 b on the other side (intermediate portion) in the longitudinal direction, and the lever portions 23 a and 23 b are connected to the connecting shaft 18.

  The connecting hole 11a of the brake pedal 11 is a perfect circle, and its inner diameter is set to be slightly larger than the outer diameter of the connecting shaft 18, and a predetermined gap is formed between them. Therefore, the elastic member 21 (lever parts 23a, 23b) can be moved relative to the connecting hole 11a along the axial direction of the operating rod 15 by the predetermined gap, and the connecting hole 11a and the connecting shaft 18 are provided in the present invention. The relative movement amount is restricted by functioning as a restriction part.

  On the connecting shaft 18, the brake pedal 11 and the lever portions 23 a and 23 b of the elastic member 21 are connected so as to be relatively displaceable by a predetermined gap (relative movement amount) CL along the axial direction of the connecting shaft 18. .

  The elastic member 21 is a surface facing the brake pedal 11 in the lever portions 23a and 23b, and between the connecting shaft 18 and the convex portions 25 and 26, four strain sensors (detection portions) 30a, 30b, 31a, 31b is mounted. When the elastic member 21 is elastically deformed by a reaction force load from the operation rod 15, the strain sensors 30 a, 30 b, 31 a, and 31 b detect the elastic deformation amount and output it as an operation amount of the brake pedal 11. As shown in FIG. 3, a connector 32 is attached to the upper portion of the mounting bracket 12, and each strain sensor 30 a, 30 b, 31 a, 31 b is connected to a wiring 33 to the connector 32.

  Therefore, when the occupant steps on the brake pedal 11, the brake pedal 11 rotates through the rotation shaft 13, and the operation amount (operation force) is transmitted to the operation rod 15 through the connecting shaft 18 and the clevis 16. The At this time, the reaction force of the brake booster and the master cylinder is input from the operating rod 15 to the elastic member 21 from the lever portions 23a and 23b via the connecting shaft 18, and this elastic member 21 is connected using the convex portions 25 and 26 as fulcrums. It is elastically deformed so as to curve toward the shaft 18 side. Then, each of the strain sensors 30a, 30b, 31a, 31b outputs the amount of distortion (elastic deformation amount) as the operation amount of the brake pedal 11 because the elastic member 21 is distorted in the tension direction and the compression direction. That is, since the amount of distortion, the amount of elastic deformation, and the amount of operation of the brake pedal 11 are correlated with each other, the amount of distortion is converted into the amount of operation of the brake pedal 11 using a preset map.

  At this time, since the lever portions 23a and 23b can move by a predetermined gap between the connecting hole 11a and the connecting shaft 18, the elastic member 21 can be sufficiently elastically deformed. By limiting the amount of deformation, the load limiting function is exhibited.

  As described above, in the operation amount detection device according to the first embodiment, the brake pedal 11 and the operation rod 15 are connected by the connection shaft 18, and the end portions 22 a and 22 b of the elastic member 21 are connected to the connection shaft 18 by the operation rod. 15 is in contact with and supported by the convex portions 25 and 26 of the brake pedal 11 which are spaced apart in a direction intersecting the axial direction of the 15 axis, and the intermediate portion of the elastic member 21 is connected by the connecting shaft 18 and the connecting hole 11a so as to be relatively displaceable. The elastic member 21 is provided with strain sensors 30a, 30b, 31a, 31b that detect the amount of elastic deformation and output the amount as a brake operation amount.

  Therefore, when an operation reaction force of the brake pedal 11 is input to the elastic member 21 via the operation rod 15, the elastic member 21 is elastically deformed so as to be bent with the convex portions 25 and 26 as fulcrums, and each of the strain sensors 30a, 30b, 31a, 31b can detect the amount of elastic deformation of the elastic member 21 as a strain amount load in the tension direction and the compression direction, and output this as an operation amount of the brake pedal 11. That is, the structure of the operation amount detection unit 20 can be simplified to reduce the manufacturing cost, while the load limiting function can be easily configured.

  In this case, the brake pedal 11 and the elastic member 21 connect the lever portions 23 a and 23 b of the elastic member 21 to the brake pedal 11 by the connecting shaft 18, and connect the end portions 22 a and 22 b to the convex portions 25 and 26 of the brake pedal 11. Is supported by pressing. Therefore, the connection relationship between the brake pedal 11 and the elastic member 21 can be simplified, and the cost can be reduced.

  In the operation amount detection device of the first embodiment, lever portions 23 a and 23 b as movers are formed integrally with the elastic member 21, and the lever portions 23 a and 23 b and the connection hole 11 a are arranged in the axial direction of the operation rod 15. In contrast, the lever portions 23a and 23b are connected so as to be relatively movable, and the relative movement amount of the lever portions 23a and 23b is restricted by the connecting shaft 18 and the connecting hole 11a as a restricting portion. Therefore, the elastic member 21 and the lever portions 23a and 23b are integrated, and the relative displacement amount of the lever portions 23a and 23b is regulated by the connecting shaft 18 and the connecting hole 11a, so that the device can be made compact and low in cost. it can.

  Further, in the operation amount detection device according to the first embodiment, a clip 27 is provided as a biasing member that biases the brake pedal 11 and the elastic member 21 in a direction in which they approach each other. Accordingly, the end portions 22a and 22B of the elastic member 21 can be supported by the urging force of the clip 27 so as to abut against the convex portions 25 and 26 of the brake pedal 11, and the backlash of the device can be absorbed. Each member can be centered.

  Further, in the operation amount detection device of the first embodiment, the elastic member 21 has an intermediate portion connected to the brake pedal 11 by the connecting shaft 18 via the lever portions 23a and 23b, and the end portions 22a and 22b are connected to the convex portions 25 and 22b. 26, the brake pedal 11 is supported. Therefore, the elastic member 21 can be supported with sufficient strength, and the relative displacement of the elastic member 21 can be appropriately allowed to improve the detection accuracy.

  Furthermore, in the operation amount detection device according to the first embodiment, the brake pedal 11 and the operation rod 15 are connected by the connecting shaft 18, and the brake pedal separated from the connection shaft 18 in a direction intersecting the axial direction of the operation rod 15. 11 convex portions 25, 26 are formed, lever portions 23 a, 23 b are formed in the intermediate portion of the elastic member 21, and the connecting shaft 18 is connected to the brake pedal 11 so as to be relatively movable with respect to the axial direction of the operating rod 15. At the same time, the end portions 22a and 22b of the elastic member 21 are contacted and supported by the convex portions 25 and 26 of the brake pedal 11, and the elastic members 21 detect the amount of elastic deformation and output it as an operation amount. , 31b.

  Therefore, the operation amount detection unit 20 can be modularized, and the structure can be simplified and the manufacturing cost can be reduced.

  FIG. 4 is a front view of an essential part of the manipulated variable detection device according to the second embodiment of the present invention, partly cut away. The overall configuration of the manipulated variable detection device according to the present embodiment is substantially the same as that of the above-described first embodiment, and will be described with reference to FIG. 3 and a member having the same function as that described in the present embodiment. Are denoted by the same reference numerals and redundant description is omitted.

  As shown in FIGS. 3 and 4, the operation amount detection device according to the second embodiment converts the rotation operation of the brake pedal 11 into a linear operation of the operation rod 15 and transmits the operation amount to the master cylinder and the brake booster. The brake pedal stroke (or brake pedal depression force) is detected. In the second embodiment, the operation amount detection unit 40 can be mounted as one module on the brake pedal 11 described above.

  In this operation amount detection unit 40, the elastic member 41 is made of metal or synthetic resin, has a predetermined thickness, has a predetermined length along the longitudinal direction of the brake pedal 11, and is elastic by a predetermined load. It is configured to be deformable. The elastic member 41 has a plate-like main body portion 42 extending along the longitudinal direction of the brake pedal 11 on the front end side of the brake pedal 11, and the brake pedal 11 from an intermediate portion in the longitudinal direction of the main body portion 42. It is comprised from a pair of lever parts 43a and 43b bent at a substantially right angle so that each plane part may be followed.

  The lever portions 43a and 43b in the elastic member 41 are located at both sides of the brake pedal 11 in the plate thickness direction with a predetermined interval. The connecting shaft 18 passes through the support holes 44a and 44b of the lever portions 43a and 43b together with the bifurcated portions 16a and 16b of the clevis 16 and the connecting hole 11a of the brake pedal 11, so that the clevis 16 and the brake pedal 11 are elastic. The member 41 is connected so as to be relatively rotatable.

  Further, the main body portion 42 of the elastic member 41 has respective end portions extending upward and downward in the longitudinal direction of the brake pedal 11 with respect to the lever portions 43a and 43b, and curved portions 42a and 42b are formed. On the other hand, on the front end side of the brake pedal 11, convex portions 45 and 46 are formed integrally with the curved portions 42 a and 42 b of the main body portion 42 of the elastic member 41 and the outer surfaces of which are semicircular. In addition, a resin-made clip 27 as an urging member is installed between the brake pedal 11 and the elastic member 41, and the elastic member 41 is urged by the urging force (elastic force) of the clip 27. Energized and supported in the direction of approaching.

  The clip 27 has a U-shape and is disposed so as to straddle the rear end side of the brake pedal 11, and the locking portions 27 a and 27 b formed at the respective end portions of the lever portions 43 a and 43 b in the elastic member 41. Locked in the locking holes 48a and 48b. Therefore, the elastic member 41 is urged toward the brake pedal 11 by the urging force of the clip 27, and the curved portions 42 a and 42 b in the main body 42 abut (contact) the convex portions 45 and 46 in the brake pedal 11. And is supported.

  In this case, since the curvature radii of the curved portions 42a and 42b and the curvature radii of the convex portions 45 and 46 are set to be substantially the same, the elastic member 41 has the respective curved portions 42a and 42b that are convex on the brake pedal 11. It will lock so that it may contact | abut to the parts 45 and 46, and the relative movement in a longitudinal direction is controlled. That is, the curved portions 42 a and 42 b function as a restraining portion that restricts relative movement of the elastic member 41 and the brake pedal 11 in the longitudinal direction.

  When the curved portions 42a and 42b are caused to function as a restraining portion that restricts the relative movement of the elastic member 41 and the brake pedal 11 in the longitudinal direction, the shape thereof is not limited to that described above. For example, the curved portions 42a and 42b of the elastic member 41 are locked to the outside of the convex portions 45 and 46 of the brake pedal 11, but may be locked to the inside. Moreover, it is good also considering the edge part of an elastic member as a restraint part which makes L shape. In other words, the restraining portion of the elastic member may be locked to the convex portion of the brake pedal 11 in a direction intersecting the longitudinal direction of the brake pedal 11.

  The elastic member 41 is a surface facing the brake pedal 11 in the lever portions 43a and 43b, and between the connecting shaft 18 and the convex portions 45 and 46, four strain sensors (detection portions) 30a, 30b, 31a, 31b is mounted. When the elastic member 41 is elastically deformed by a reaction force load from the operation rod 15, the strain sensors 30 a, 30 b, 31 a, and 31 b detect the elastic deformation amount and output it as an operation amount of the brake pedal 11.

  Therefore, when the occupant steps on the brake pedal 11, the brake pedal 11 rotates through the rotation shaft 13, and the operation amount (operation force) is transmitted to the operation rod 15 through the connecting shaft 18 and the clevis 16. The At this time, the reaction force of the brake booster and the master cylinder is input from the operating rod 15 to the elastic member 41 from the lever portions 42a and 42b via the connecting shaft 18, and this elastic member 41 is connected using the convex portions 45 and 46 as fulcrums. It is elastically deformed so as to curve toward the shaft 18 side. Then, each of the strain sensors 30a, 30b, 31a, 31b outputs the amount of distortion (elastic deformation amount) as the operation amount of the brake pedal 11 because the elastic member 41 is distorted in the tension direction and the compression direction. That is, since the amount of distortion, the amount of elastic deformation, and the amount of operation of the brake pedal 11 are correlated with each other, the amount of distortion is converted into the amount of operation of the brake pedal 11 using a preset map.

  At this time, since the lever portions 43a and 43b can move by a predetermined gap between the connecting hole 11a and the connecting shaft 18, the elastic member 41 can be sufficiently elastically deformed. By limiting the amount of deformation, the load limiting function is exhibited.

  As described above, in the operation amount detection device of the second embodiment, the brake pedal 11 and the operation rod 15 are connected by the connecting shaft 18, and the curved portions 42 a and 42 b of the elastic member 41 are connected to the connecting shaft 18 by the operation rod. 15 is in contact with and supported by the convex portions 45 and 46 of the brake pedal 11 separated in a direction intersecting with the axial direction of the 15 axis, and the intermediate portion of the elastic member 41 is connected to the connecting shaft 18 and the connecting hole 11a so as to be relatively displaceable. The elastic member 41 is provided with strain sensors 30a, 30b, 31a, 31b that detect the amount of elastic deformation and output the amount as a brake operation amount.

  Therefore, when the operation reaction force of the brake pedal 11 is input to the elastic member 41 via the operation rod 15, the elastic member 41 is elastically deformed so as to be bent with the convex portions 45 and 46 as fulcrums, and the strain sensors 30a, 30b, 31a, 31b can detect the amount of elastic deformation of the elastic member 41 as a strain amount load in the tensile direction and the compression direction, and output this as an operation amount of the brake pedal 11. That is, the structure of the operation amount detection unit 40 can be simplified to reduce the manufacturing cost, while the load limiting function can be easily configured.

  Further, in the operation amount detection device of the second embodiment, the elastic member 41 and the brake pedal 11 are relatively moved in the longitudinal direction by being engaged with the convex portions 45 and 46 of the brake pedal 11 at the end of the elastic member 41. Bending portions 42a and 42b are provided as restraining portions that restrict the movement. Accordingly, it is possible to prevent the displacement and backlash between the elastic member 41 and the brake pedal 11, and the interference between the strain sensors 30a, 30b, 31a, 31b mounted on the elastic member 41 and the peripheral members. And can improve reliability.

  In the second embodiment, the curved portions 42a and 42b that are engaged with the convex portions 45 and 46 of the brake pedal 11 are provided at the end of the elastic member 41 as the restraining portion. A portion may be provided and locked to the elastic member 41 side.

  As described above, the operation amount detection device according to the present invention is configured such that the one side of the elastic member that is elastically deformed by receiving the operation reaction force is formed on the convex portion of the operation member that is separated in the direction intersecting the axial direction of the operation rod. By supporting it, the structure can be simplified and the manufacturing cost can be reduced, while the load limiting function can be configured, and it is useful for any manipulated variable detection device.

11 Brake pedal (operating member)
11a Connecting hole (Regulator)
DESCRIPTION OF SYMBOLS 13 Rotating shaft 15 Operation rod 16 Clevis 18 Connection shaft 20 Operation amount detection unit 21, 41 Elastic member 22, 42 Main body part 22a, 22b End part 23a, 23b, 43a, 43b Lever part (movable element)
25, 26, 45, 46 Convex 27 Clip (Biasing member)
30a, 30b, 31a, 31b Strain sensor (detection unit)
42a, 42b Bent part (restraint part)

Claims (7)

In the operation amount detection device that detects the operation amount transmitted to the operation target member by converting the rotation operation of the operation member into the linear operation of the operation rod,
A connecting shaft for connecting the operating member and the operating rod;
An elastic member, one side of which is supported in contact with the convex portion of the operating member spaced in a direction intersecting the axial direction of the operating rod with respect to the connecting shaft, and the other side is connected to the connecting shaft;
A detection unit that detects the amount of elastic deformation of the elastic member and outputs it as an operation amount;
An operation amount detection device comprising:   The elastic member has an intermediate portion in the longitudinal direction connected to the connecting shaft as the other side, and each end portion in the longitudinal direction is supported by being in contact with the convex portion of the operating member as the one side. The operation amount detection device according to claim 1.   The operation amount detection device according to claim 1, further comprising an urging member that urges the operation member and the elastic member toward each other.   The restraint part which controls the relative movement in the longitudinal direction of the said elastic member and the said operation member is provided in the edge part of the said elastic member, or the convex part of the said operation member, The any one of Claim 1 to 3 characterized by the above-mentioned. The operation amount detection device according to one.   The mover is fixed to the elastic member, and the mover is connected so as to be relatively movable with respect to the axial direction of the connecting shaft and the operating rod. The operation amount detection device described in 1.   The operation amount detection device according to claim 5, further comprising a restriction portion that restricts a relative movement amount between the mover and the connecting shaft.   The operation amount detection device according to any one of claims 1 to 6, wherein a strain sensor as the detection unit is provided between the connecting shaft and the convex portion in the elastic member.

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