JP2018017512A - Load detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compose a load detector that suppresses the relative movements of an input member and a strain causing body in a separating direction and detects a load acting on the strain causing body with high accuracy.SOLUTION: A load detector comprises an annular input member 1 on which a load acts, and a strain causing body 3 equipped with a cylindrical part 4 and a strain causing part 5 extending radially inward from the inner circumference of the cylindrical part 4, and includes a strain detection element 8 equipped on a detection face 5b of the strain causing part 5 opposite a pressure receiving face 5a with which the contact face 1b of the input member 1 comes in contact, and a fixing member 10 supported by an extension part of the cylindrical part 4 of the strain causing body 3 extending to a side opposite the input member 1 relative to the strain causing part 5. Also included is a restriction member 15 which is supported at one end on the inner circumference of the fixing member 10 and has formed at the other end a restriction part 15c that extends radially outward in order to restrict displacement of the input member 1 in a direction separating from the strain causing part 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a load detection device that distorts a strain generating body with a load acting on an input member and detects the load with a strain detection element provided in the strain generating body.

  As a load detection device configured as described above, Patent Literature 1 discloses that an input member (a sphere in the literature) is placed in contact with a strain body (a base in the literature) and a plurality of strains are detected in the strain body. Techniques with elements are described.

  In Patent Document 1, a strain of a strain generating body due to a load acting on an input member is detected by a plurality of strain detection elements, and a cover that prevents displacement in a direction in which the input member is separated from the strain generating body is provided. It is equipped with a strain body. The cover is formed with a through hole that exposes a part of the input member configured as a sphere.

JP 2006-194709 A

  In a load detection device including an input member and a strain generating body, the input member and the strain generating body are held in a close positional relationship in order to suppress the inconvenience that the input member and the strain generating body are largely separated from each other. Is essential.

  Therefore, a load detection device provided with an input member and a strain body requires the same configuration as the cover disclosed in Patent Document 1. However, in Patent Document 1, since the cover is fixed to the strain generating body, the strain at the time of fixing may act on the strain generating body, and it is considered that the detection accuracy is lowered. In addition, since the strain generating body is fixed, there is a possibility that the strain according to the load acting on the input member may not be generated in the strain generating body, and this may reduce the detection accuracy.

  Considering a regulating member that holds the input member and the strain generating body in a close positional relationship, it is important that this regulating member does not apply unnecessary stress to the strain generating body and does not disturb the external force that acts on the input member. It becomes.

  For these reasons, there is a need for a load detection device that suppresses the relative movement of the input member and the strain body in the separation direction and accurately detects the load acting on the strain body.

The feature of the present invention is that the input member is formed in an annular shape around the shaft core, and a load acts in a direction along the shaft core;
A strain-generating body integrally formed with a tubular portion formed in a cylindrical shape around the shaft core, and a strain-generating portion projecting radially inward from the inner periphery of the tubular portion,
Among the strain generating portions, a strain detection element provided on a detection surface opposite to the pressure receiving surface with which the contact surface of the input member contacts,
A fixing member that is molded in an annular shape centered on the shaft core and is supported by an extending portion that extends to the opposite side of the input member with respect to the strain-generating portion of the tubular portion of the strain-generating body;
While comprising an opening of the input member, an opening of the strain generating portion, and a restricting member inserted through the opening of the fixing member,
The restricting member forms a support portion supported on the inner periphery of the fixed member on one end side, and the input member is centered on the shaft core to restrict displacement in a direction away from the strain generating portion. It is in the point which forms the control part which protrudes to radial direction outward on the other end side.

According to this characteristic configuration, when the input member is displaced in a direction away from the strain generating body, the restricting portion comes into contact with the input member to prevent displacement in the separation direction. Further, since the restricting portion is supported by the fixing member, no stress is applied to the strain generating body from the restricting portion.
Therefore, a load detection device that suppresses relative movement of the input member and the strain body in the separation direction and accurately detects a load acting on the strain body is configured.

  As another configuration, in the region along the opening edge of the input member, the input member is provided with a regulating surface formed closer to the contact surface with reference to a load acting surface on which a load acts on the input member, and the contact A first gap may be formed between the restricting portion and the restricting surface in a state where the surface is in contact with the pressure receiving surface.

  According to this, since the first gap is formed between the restriction surface of the input member and the restriction portion of the restriction member, an unnecessary stress is not applied to the input member from the restriction portion, and the load is erroneously detected. Is not invited. Further, even if a load in a direction inclined with respect to the shaft core acts on the input member and the input member may be slightly displaced in a direction perpendicular to the shaft core, this displacement direction is the direction of the first gap. Therefore, the restricting portion does not come into contact with the input member, and the detection accuracy is not lowered.

  As another configuration, the restriction member forms a main body portion between the support portion and the restriction portion, and between the outer surface of the main body portion and the inner periphery of the opening of the strain body. A second gap may be formed.

  According to this, by forming the second gap between the outer surface of the regulating member and the inner periphery of the hole of the strain generating body, unnecessary stress is not applied to the strain generating body from the regulating member, There will be no false detection of load. Further, even if a load in a direction inclined with respect to the shaft core acts on the input member and the input member may be slightly displaced in a direction perpendicular to the shaft core, this displacement direction is the direction of the second gap. Therefore, the main body portion of the restricting member does not contact the inner periphery of the opening portion of the input member, and the detection accuracy is not lowered.

  As another configuration, a load acting surface on which a load acts on the input member, the restricting portion, and the strain generating portion may be arranged along the axis in this order.

  According to this, the member that abuts against the load acting surface of the input member and acts on the load exerts pressure on the input member without contacting the regulating portion, and further, the pressure acting on the input member is It becomes possible to act on.

  As another configuration, the restricting member may include a rotation restricting portion that restricts rotation of the input member around the axis by engaging with an engaging portion formed on the input member.

  According to this, it becomes possible to prevent rotation of the input member by engaging the rotation restricting portion of the restricting member with the engaging portion of the input member. In this configuration, no external force is applied to the input member from the engaging portion, and no stress is applied to the strain generating portion from the input member.

It is sectional drawing of a load detection apparatus. It is an expanded sectional view which shows the clearance gap between a control part and a control surface. It is a front view which shows the relationship between a control part and a control surface. It is a disassembled perspective view of a load detection apparatus. It is a perspective view which shows a fixing member and an elastic board. It is sectional drawing which shows the engagement state of an engaging claw and an engagement piece. It is a disassembled perspective view of a strain body, a fixing member, and a board | substrate. It is sectional drawing which shows the engagement state of a strain body and a fixing member. It is a perspective view of the load detection apparatus of an assembly state. It is a perspective view of the completed load detection apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
〔overall structure〕
As shown in FIGS. 1 and 4, the annular input member 1, the annular strain body 3, the plurality of strain detection elements 8 provided on the detection surface 5 b of the strain body 3, and the strain body 3 are supported. The load detection device 100 is configured to include the fixed member 10 that is to be operated and the cylindrical restriction member 15 that restricts the input member 1.

  The load detection device 100 is used to detect a load acting on a brake disc for braking and an operation system for braking in a vehicle. Note that the load detection device 100 may be used in places other than the vehicle that are necessary for load detection.

  In this load detection device 100, the input member 1, the strain body 3, the fixing member 10, and the regulating member 15 are arranged on the axis X and the coaxial core. The restricting member 15 is disposed at a position penetrating the input opening 1H of the input member 1, the strain-generating opening 5H of the strain-generating body 3, and the fixed opening 10H of the fixing member 10. Furthermore, the shaft 20 is disposed coaxially with the axial core X inside the regulating member 15, and a cylindrical load acting body 21 that applies a load to a position where the shaft 20 can contact the input member 1 is coaxial with the axial core X. It is arranged with. The shaft 20 is configured to rotate about the axis X and transmit a driving force.

  The input member 1 and the strain body 3 are formed of a metal material such as stainless steel or aluminum alloy, and the fixing member 10 is formed of an insulating and thermoplastic resin material. Moreover, although the regulating member 15 is formed of a metal material, it may be formed of resin.

[Input material]
As shown in FIGS. 1 to 4, the input member 1 is formed in an annular shape around an axis X, a flat load acting surface 1 a is formed on one side in the direction along the axis X, and the other is spherical The contact surface 1b is formed.

  A circular input opening 1H is formed at the center of the input member 1. Along the opening edge of the input opening 1H (inner peripheral portion), the contact surface 1b is defined with reference to the load acting surface 1a. A regulating surface 2 is formed at a position close to the direction. The restriction surface 2 is formed in a posture parallel to the load acting surface 1a, and an engaging portion 2a that is continuous outward in the radial direction is formed on a part of the outer periphery of the restriction surface 2.

[Distortion body]
As shown in FIGS. 1 and 4, the strain body 3 has a cylindrical portion 4 that is formed in a cylindrical shape around an axis X, and projects radially inward from the inner periphery of the cylindrical portion 4. It has a structure in which the strain generating portion 5 is integrally formed. The strain generating portion 5 is formed with a strain generating opening 5H in the central portion, a pressure receiving surface 5a with which the contact surface 1b of the input member 1 contacts is formed, and a detection surface 5b formed on the opposite side of the pressure receiving surface 5a. ing.

  The detection surface 5b is formed on a flat surface in a posture orthogonal to the axis X, and strain detection elements 8 are attached to four locations on the detection surface 5b. The pressure receiving surface 5a is formed as a rotating surface in a posture that approaches the detection surface 5b toward the radially inner side. In particular, when the spherical contact surface 1b of the input member 1 contacts the pressure receiving surface 5a, the load acting on the input member 1 from the load acting body 21 is inclined with respect to the axis X. Although the attitude of the input member 1 is changed, the position where the contact surface 1b and the pressure receiving surface 5a are in contact with each other is not changed, and the detection performance is not changed.

  The strain generating portion 5 is formed at an intermediate position in the direction along the axis X in the cylindrical portion 4. Accordingly, the tubular portion 4 has the first extending portion 4a extending in the arrangement direction of the load acting body 21 with respect to the strain-generating portion 5 and the arrangement of the fixing member 10 with respect to the strain-generating portion 5. A second extending portion 4b extending in the direction is formed.

  Further, in order to hold the fixing member 10 on the inner periphery of the second extension portion 4b, an annular holding groove 6 formed on the inner periphery of the second extension portion 4b and an annular protruding wall 7 are formed. Has been.

[Strain detection element / connecting member]
As shown in FIGS. 1, 4, and 7, a connecting member 9 that is electrically connected to the lead portion of the strain detecting element 8 is disposed at a position overlapping the detection surface 5 b of the strain generating portion 5. The connecting member 9 includes an annular portion 9a that is formed into an annular shape, a connecting portion 9b that is connected to the substrate 12, and an intermediate portion 9c that connects these members, using a flexible sheet material in the same manner as the flexible substrate. . Further, the connection portion 9b is formed with an insertion hole through which the positioning pin 10c of the fixing member 10 is inserted.

  A hole corresponding to the four strain detection elements 8 is formed in the annular portion 9a to form a first connection portion 9at, and a second connection portion 9bt having a plurality of holes is formed in the connection portion 9b. Yes. Further, a wiring connecting the first connection portion 9at and the second connection portion 9bt is formed in the intermediate portion 9c.

  With this configuration, the four strain detection elements 8 are inserted into the corresponding holes of the first connection portions 9at, and the lead portions of the strain detection elements 8 are connected to the wiring of the annular portion 9a by soldering. A strain detecting element 8 is connected to the Wheatstone bridge.

  Further, as shown in FIG. 9, the intermediate portion 9c of the connecting member 9 is passed through the space between the outer periphery of the fixing member 10 and the inner periphery of the second extending portion 4b of the strain-generating portion 5, and the intermediate portion 9c. A plurality of signal input portions 12b formed on the surface of the substrate 12 provided in the fixing member 10 so as to be bent are overlapped with a plurality of holes of the second connection portion 9bt, and as shown in FIG. Are connected by solder, and the strain detection element 8 and the substrate 12 become conductive.

[Fixing member]
As shown in FIGS. 1, 4, 5 to 8, the fixing member 10 has a fixed opening 10 </ b> H centered on the axis X at the center and the second extension of the strain body 3. A plurality of engaging claws 10a are formed that elastically protrude outward so as to engage with the holding groove 6 on the inner periphery of the portion 4b.

  In this fixing member 10, a pair of guide hole portions 10b having a posture parallel to the axis X are formed on the inner end surface (the left end surface in FIG. 1) facing the detection surface 5b of the strain generating portion 5, and each guide is formed. An engagement protrusion 10d shown in FIG. 6 is formed on the inner surface of the hole 10b.

  A plurality of positioning pins 10c and a terminal holder 10e are formed on the outer end surface (right end surface in FIG. 1) of the fixing member 10 so as to protrude. A substrate 12 is provided on the outer end surface, and a terminal 13 is provided on the terminal holder 10e.

  In addition, an elastic plate 11 using a spring material is provided on the inner end surface of the strain generating portion 5 in the fixing member 10. The elastic plate 11 is generally annular, and includes a pair of fitting pieces 11a having engagement holes 11b with which engagement protrusions 10d on the inner surface of the guide hole portion 10b of the fixing member 10 are engaged, and four support pieces 11c. And are integrally formed. From this configuration, as shown in FIG. 6, the pair of fitting pieces 11a are inserted into the guide holes 10b of the fixing member 10 and engaged with the engaging holes 11b by the engaging protrusions 10d. An elastic plate 11 is attached.

  Further, by inserting the fixing member 10 into the second extending portion 4b of the cylindrical portion 4 with the elastic plate 11 attached to the fixing member 10, as shown in FIG. 6 and the four support pieces 11c come into contact with the protruding wall 7 on the inner periphery of the second extending portion 4b. As a result, an urging force is applied to the fixing member 10 in the direction away from the strain generating portion 5, the engaging claw 10a is brought into contact with the inner surface of the holding groove 6, and the fixing member 10 reaches the positioning state.

  As shown in FIG. 7, the substrate 12 has a substrate hole portion 12H formed in the center, a positioning hole 12a through which the positioning pin 10c is inserted, and four signal input portions 12b for inputting signals; A plurality of output holes 12c for outputting signals are formed.

  7 and 9, the terminal 13 made of a conductor is press-fitted and supported in the terminal holder 10 e of the fixing member 10, and the positioning pin 10 c of the fixing member 10 is inserted into the positioning hole 12 a of the substrate 12. The board 12 is set by inserting the conduction pin 13a formed integrally with the terminal 13 into the output hole 12c of the board 12.

  In this set state, the positioning pin 10c is inserted into the insertion hole portion of the connection portion 9b, and the protruding ends of the plurality of positioning pins 10c are heated and pressure is applied, as shown in FIG. The substrate 12 is fixed to the fixing member 10. Then, the second connection portion 9bt of the connection portion 9b is connected to the signal input portion 12b of the substrate 12 to the electrode by soldering, and the conduction pin 13a and the output hole 12c are connected by soldering.

  Thereby, the fixing member 10 is accommodated inside the second extending portion 4b of the strain generating body 3, and the detection signal of the strain detecting element 8 can be taken out from the terminal 13 of the substrate 12.

[Regulatory members]
As shown in FIGS. 1 to 4, the restricting member 15 includes the input opening 1 </ b> H of the input member 1, the strain opening 5 </ b> H of the strain body 3, and the fixed opening 10 </ b> H of the fixing member 10 as described above. It arrange | positions in the position which penetrates. The restricting member 15 has a body portion 15a that is generally cylindrical, and has a support portion 15b formed on one end side and a restricting portion 15c formed on the other end side.

  The support portion 15b is formed to be slightly larger in diameter than the fixed opening portion 10H so as to be fitted and supported on the inner periphery of the fixed opening portion 10H of the fixing member 10. The restricting portion 15c is formed in a flange shape projecting outward in a posture orthogonal to the axis X. Further, a rotation restricting piece 15d (an example of a rotation restricting portion) is formed by projecting outward at only one location on the outer periphery of the restricting portion 15c.

  With this configuration, the input member 1 is disposed inside the first extension portion 4 a of the strain body 3, the fixing member 10 is inserted into the input opening 1 H of the input member 1, and the support portion 15 b is inserted into the fixing member 10. The regulation member 15 is attached by press-fitting into the fixed opening 10H.

  By attaching the restricting member 15 in this way, the restricting portion 15 c is disposed at a position close to the restricting surface 2 of the input member 1, and the rotation restricting piece 15 d is fitted into the engaging portion 2 a at a position continuous with the restricting surface 2. Include.

  In particular, when the contact surface 1 b of the input member 1 is in contact with the pressure receiving surface 5 a of the strain generating body 3, the first gap G 1 is formed between the restricting portion 15 c and the restricting surface 2, and the main body of the restricting member 15. A second gap G2 is formed between the outer peripheral surface of the portion 15a and the inner peripheral surface of the input opening 1H of the input member 1. The second gap G2 is also formed between the outer peripheral surface of the main body portion 15a of the regulating member 15 and the inner peripheral surface of the strain-generating opening 5H of the strain-generating portion 5.

  Further, when the contact surface 1 b of the input member 1 is in contact with the pressure receiving surface 5 a of the strain generating body 3, a third gap G <b> 3 is formed between the outer periphery of the restricting portion 15 c and the inner periphery of the restricting surface 2. ing. The input member 1 is disposed at a position that is displaced in the direction of the strain generating body 3 by the set distance F in the direction along the axis X with respect to the load acting surface 1a up to the restricting portion 15c.

  Then, the rotation restricting piece 15d formed integrally with the restricting portion 15c is in a positional relationship in which the rotation restricting piece 15d is fitted into the engaging portion 2a connected to the restricting surface 2 of the input member 1. In this state, a gap is formed between the rotation restricting piece 15d and the engaging portion 2a (see FIG. 3).

  Thereby, when the input member 1 is displaced in the direction away from the strain body 3, the restriction portion 15 c of the restriction member 15 contacts the restriction surface 2 of the input member 1 to prevent displacement in the separation direction. Further, since the restriction member 15 in which the restriction portion 15 c is formed is supported by the fixing member 10, stress due to the provision of the restriction member 15 does not act on the strain body 3.

  Therefore, when assembling the load detection device 100, as described above, with the fixing member 10 inserted into the second extending portion 4b of the cylindrical portion 4, the crimping end of the positioning pin 10c is heat caulked, Connect with solder. Thereafter, the input member 1 is disposed inside the first extension portion 4 a of the strain body 3, the fixing member 10 is inserted into the input opening 1 H of the input member 1, and the support portion 15 b is fixed to the fixing member 10. It press-fits and fixes to the opening 10H.

  Thereby, the load detection apparatus 100 is completed, and in this completed state, the restricting portion 15c of the restricting member 15 fits into the portion of the restricting surface 2 of the input member 1, and the rotation restricting piece 15d fits into the engaging portion 2a. Further, as described above, the first gap G1, the second gap G2, and the third gap G3 are formed on the basis of the restricting portion 15c or the main body portion 15a, and the set distance F is set.

[Operation / Effect of Embodiment]
With this configuration, when the input member 1 is displaced in a direction away from the strain body 3, the restriction portion 15 c of the restriction portion 15 c comes into contact with the restriction surface 2 of the input member 1, so that the displacement in the separation direction is reduced. Be blocked. Further, since the restricting portion 15 c is supported by the fixing member 10, stress due to the provision of the restricting member 15 does not act on the strain generating portion 5.

  Even if a load in a direction inclined with respect to the shaft core X acts on the input member 1 and the input member 1 is slightly displaced in a direction orthogonal to the shaft core X, this displacement direction is the first gap. Since it is a direction along G1 and the 2nd gap | interval G2, the control part 15c does not contact the input member 1. FIG. Further, the main body 15 a of the restricting member 15 does not come into contact with the inner periphery of the input opening 1 H of the input member 1 or the strain-generating opening 5 H of the strain-generating part 5. In this way, even if the attitude of the input member 1 changes, the detection accuracy is not lowered.

  Further, since the rotation restricting piece 15d formed integrally with the restricting portion 15c is engaged with the engaging portion 2a connected to the restricting surface 2 of the input member 1, the rotation about the axis X of the input member 1 is prevented. It becomes possible. As a result, the contact surface 1b and the pressure receiving surface 5a are brought into contact with each other at a predetermined surface, and the detection sensitivity is not changed.

  Further, by configuring the regulating member 15 in a cylindrical shape, even when grease or the like is scattered along with the rotation of the shaft 20 that is arranged coaxially with the shaft core X, the grease can be used as the strain detecting element 8 or the fixing member. Inconveniences adhering to the 10 wirings and the like can also be prevented.

[Another embodiment]
In addition to the above-described embodiments, the present invention may be configured as follows (the components having the same functions as those of the embodiments are given the same numbers and symbols as those of the embodiments).

(A) A male screw is formed on the support portion 15b of the restricting member 15, a female screw is formed on the inner periphery of the fixing opening 10H of the fixing member 10, and the restricting member 15 is fixed by a rotating operation. The force acting between the fixing member 10 and the regulating member 15 at the time of fixing can be reduced as compared with the fitting and fixing of the regulating member 15 configured as described above.

  Moreover, as a structure which supports the support part 15b of the control member 15 in the fixed opening part 10H of the fixing member 10, a protrusion is formed in the inner periphery of the fixed opening part 10H, for example, and the recessed part and hole which this protrusion engages with By forming the support portion 15b, the elastic fitting of the protrusion may be used.

(B) It replaces with the structure which makes the regulation member 15 cylindrical like embodiment, and uses the board | plate material and rod which are supported by the fixing member 10 at one end side. In this configuration, a plurality of plate materials and bar materials can be used, and the restricting portion 15c can be formed on the other end side. Even if it is such a structure, the displacement to the direction which the input member 1 leaves | separates from the strain generation part 5 can be suppressed.

(C) The configuration in which the fixing member 10 is supported by the second extending portion 4b of the strain body 3 is elastic to a concave groove formed on the inner periphery of the second extending portion 4b without using the elastic plate 11, for example. A configuration may be employed in which an elastic ring made of a body is fitted to prevent the fixing member 10 from coming off with this elastic ring.

(D) A part of the inner periphery of the input opening 1H of the input member 1 is cut out in the radial direction to form a cutout, and the protrusion-like rotation restricting piece 15d that engages with the cutout is used as the body of the restricting member 15 Provided in the part 15a. Alternatively, a part of the outer periphery of the restricting portion 15 c is notched to form a notch portion, and an engaging portion that protrudes radially inward so as to engage with the notch portion is formed on the inner periphery of the restricting surface 2. Even in these configurations, the rotation of the input member 1 around the axis X can be restricted by the rotation restricting piece 15d.

  INDUSTRIAL APPLICABILITY The present invention can be used in a load detection device that distorts a strain generating body with a load acting on an input member and detects the load with a strain detection element provided in the strain generating body.

DESCRIPTION OF SYMBOLS 1 Input member 1a Load action surface 1b Contact surface 1H Input opening part 2 Restriction surface 2a Engagement part 3 Strain body 4 Cylindrical part 4b 2nd extension part 5 Strain part 5a Pressure receiving surface 5b Detection surface 5H Strain opening Part 10 fixing member 10H fixing opening 15 restricting member 15c restricting part 15d rotation restricting piece (rotation restricting part)
G1 First gap G2 Second gap X Axis

Claims (5)

An input member that is formed in an annular shape around the shaft core, and a load acts in a direction along the shaft core;
A strain-generating body integrally formed with a tubular portion formed in a cylindrical shape around the shaft core, and a strain-generating portion projecting radially inward from the inner periphery of the tubular portion,
Among the strain generating portions, a strain detection element provided on a detection surface opposite to the pressure receiving surface with which the contact surface of the input member contacts,
A fixing member that is molded in an annular shape centered on the shaft core and is supported by an extending portion that extends to the opposite side of the input member with respect to the strain-generating portion of the tubular portion of the strain-generating body;
While comprising an opening of the input member, an opening of the strain generating portion, and a restricting member inserted through the opening of the fixing member,
The restricting member forms a support portion supported on the inner periphery of the fixed member on one end side, and the input member is centered on the shaft core to restrict displacement in a direction away from the strain generating portion. A load detection device in which a restricting portion projecting radially outward is formed on the other end side.   In the region along the opening edge of the input member, the input member is provided with a regulating surface formed closer to the contact surface with reference to a load acting surface on which a load acts on the input member, and the contact surface is the pressure receiving surface 2. The load detection device according to claim 1, wherein a first gap is formed between the restricting portion and the restricting surface in a state of abutting against the load.   The regulating member forms a main body portion between the support portion and the regulating portion, and a second gap is formed between the outer surface of the main body portion and the inner periphery of the opening of the strain generating body. The load detection device according to claim 1 or 2.   The load acting surface on which a load acts on the input member, the restricting portion, and the strain generating portion are arranged in this order along the shaft core. Load detection device.   5. The control member according to claim 1, further comprising a rotation restricting portion that restricts rotation of the input member around the shaft core by engaging with an engaging portion formed on the input member. The load detection apparatus according to claim 1.

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