Rotary Position Sensor

Abstract

A rotary position sensor 1 according to the present invention, which can highly precisely transmit a rotary motion to a rotor from the outside and carry out inspection without affecting a shaft hole, is characterized by comprising: a rotor 10 provided with a cylindrical shaft body 11 having a shaft hole 10h and a flange 12 contiguously provided to the shaft body 11 and extending toward the radially outer side of the shaft body 11; a housing 20 having a bearing 21 through which the shaft body 11 of the rotor 10 is inserted; and a measurement unit 30 that measures the position of the rotor 10 relative to the housing 20. The rotary position sensor is also characterized in that engaging units 15 are provided to peripheral portions of the flange 12.

Description

[Technical Field]

[0001] The present invention relates to a rotary position sensor that measures the relative position of a rotating body with respect to a housing. [Background technology]

[0002] Patent Document 1 discloses an electronic component that can prevent poor connections between a substrate and terminals as a rotary position sensor that detects the rotation of a rotating body. This electronic component includes a substrate, terminals that are electrically and mechanically connected to the substrate, a case that houses the substrate, and a holding structure that holds the terminals in the case.

[0003] Patent Document 2 discloses a rotary electronic component in which the rotational angle position of a rotary member and the output value output according to that rotational angle position are nearly proportional to each other, thereby enabling increased accuracy. This rotary electronic component includes a rotary member that can rotate about an axis, a holding member that rotatably holds the rotary member, multiple terminals fixed to the holding member, and a mechanism that changes the electrical state between the multiple terminals according to the rotational angle position of the rotary member, and the rotary member includes a first rotating body and a second rotating body that is positioned relative to the first rotating body and has a bearing or a shaft. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-197762 [Patent Document 2] Japanese Patent Publication No. 2020-188146 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] When inspecting a rotary position sensor, a specified operating tool is used to rotate the rotor to a specified angle, and it is determined whether the measurement value corresponding to that rotation angle falls within a specified range. Therefore, it is necessary to transmit the rotational motion from the operating tool to the rotor with high precision. Furthermore, if the operating tool is inserted into the shaft hole of the rotor to transmit the rotational force to the rotor during inspection, there is a concern that the shaft hole may be affected.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a rotary position sensor that can transmit rotational motion to a rotating body from the outside with high precision and can be inspected without affecting the shaft hole. [Means for solving the problem]

[0007] One aspect of the present invention is a rotary position sensor comprising a rotating body having a cylindrical shaft portion having an axial hole and a flange portion connected to the shaft portion and extending radially outward from the shaft portion, a housing having a bearing portion through which the shaft portion of the rotating body is inserted, and a measuring portion that measures the relative position of the rotating body with respect to the housing, wherein an engaging portion is provided on the peripheral portion of the flange portion.

[0008] With this configuration, the rotor can be rotated by applying external force to the engagement part located on the periphery of the rotor, which increases the operating accuracy of the rotor compared to when applying force near the central axis of the rotor. In addition, since measurements can be made without touching the shaft hole, the influence on the shaft hole during inspection can be avoided.

[0009] In the rotary position sensor described above, the shaft hole may have a holder for receiving and holding an operating shaft having a non-circular cross section when viewed in a direction along the rotation axis of the rotor. A functional inspection of the measuring unit is performed without inserting a member used in the inspection into the shaft hole. Therefore, the inspection is performed without affecting the holder for receiving and holding the operating shaft.

[0010] In the rotary position sensor, the engaging portion may have a first engaging portion and a second engaging portion disposed on either side of the rotation axis of the rotor, and when viewed in a direction along the rotation axis of the rotor, the first engaging portion and the second engaging portion may have shapes that are line-symmetrical with respect to a first imaginary line that is along the radial direction of the rotor. Thus, in a configuration in which a member that applies force to the rotor is brought into contact with the two engaging portions to operate the rotor, the two engaging portions having line-symmetric shapes can bring the member into symmetrical contact with the rotor, improving operability of the member.

[0011] In the rotary position sensor, the engaging portion may have an extending portion that extends radially outward from the rotating body when viewed along the rotation axis of the rotating body, thereby increasing the internal space of the rotating body compared to when the engaging portion is recessed inside the rotating body, thereby increasing the degree of freedom in arranging the measuring portion.

[0012] In the rotary position sensor, the extending portion may have a protruding portion that protrudes in a direction intersecting the direction of extension of the extending portion when viewed in a direction along the rotation axis of the rotor. The protruding portion is easier to contact than other portions, which improves the ease of attachment of a member that applies force to the rotor.

[0013] In the rotary position sensor, the protrusion may be configured to have a curved line when viewed in a direction along the rotation axis of the rotor, thereby improving contact stability between the engaging portion and a member that applies force to the rotor.

[0014] The rotary position sensor may have a configuration in which a recessed portion, in which the flange portion is partially recessed when viewed in a direction along the rotation axis of the rotor, is provided continuous with the extending portion. The presence of the recessed portion makes it easier for a member that applies force to the rotor to come into contact with the engaging portion. Furthermore, by providing the extending portion continuous with the recessed portion, stable contact between the member that applies force to the rotor and the engaging portion can be ensured even if the extending portion extends only slightly, thereby enabling the sensor to be made smaller.

[0015] In the rotary position sensor, when viewed in a direction along the rotation axis of the rotor, the engaging portion may have a shape that is line-symmetrical with a second imaginary line that runs radially through the rotor and passes through the interior of the engaging portion. In a configuration in which a member that applies force to the rotor engages with one engaging portion to operate the rotor, having the engaging portion have such a line-symmetrical shape can improve operability of the member.

[0016] In the rotary position sensor, the housing may have a protrusion that has an overlapping portion that overlaps with the engaging portion of the rotor at the reference position when viewed along the rotation axis of the rotor. The rotor can be positioned at the reference position by arranging an alignment member so that the overlapping portion of the protrusion and the engaging portion come into contact with each other.

[0017] In the rotary position sensor, the protrusion may have a portion located outside the engaging portion when viewed along the rotation axis of the rotor. If the protrusion has a portion located outside the engaging portion, it becomes easier to visually check, from the direction along the rotation axis, whether the rotor is at the reference position.

[0018] In the rotary position sensor, the measuring unit may include a fixed measuring unit attached to the housing and a movable measuring unit attached to the rotating body, whereby, by rotating the rotating body, the movable measuring unit rotates relative to the fixed measuring unit on the housing, thereby measuring a change in the relative position between the rotating body and the housing.

[0019] In the rotary position sensor, the fixed measuring unit may have a resistor, and the movable measuring unit may have a slider in sliding contact with the resistor, whereby the resistance value changes depending on the position of sliding contact between the resistor of the fixed measuring unit and the slider of the movable measuring unit, thereby measuring a change in the relative position between the rotor and the housing.

[0020] In the rotary position sensor, the movable measuring unit may have a resistor, and the fixed measuring unit may have a slider in sliding contact with the resistor, whereby the resistance value changes depending on the position of sliding contact between the resistor of the movable measuring unit and the slider of the fixed measuring unit, thereby measuring a change in the relative position between the rotor and the housing.

[0021] The rotary position sensor may have crush ribs on the inner wall of the shaft hole, so that even if the rotating body has a shaft hole with crush ribs, the engaging portion can be used to engage with a member that applies force to the rotating body without affecting the crush ribs.

[0022] In the rotary position sensor, the engaging portion may be configured to engage with an operating jig of a function inspection device of the measuring portion. By engaging the operating jig with the engaging portion located on the periphery of the rotating body, the operating accuracy of the operating jig is improved. Furthermore, since measurements can be performed without touching the shaft hole, the impact on the shaft hole during inspection is avoided. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a rotary position sensor that can transmit rotational motion to a rotating body from the outside with high precision and can perform inspection without affecting the shaft hole. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view illustrating a rotary position sensor according to an embodiment of the present invention; [Figure 2] 1 is an exploded perspective view illustrating the configuration of a rotary position sensor according to an embodiment of the present invention. FIG. [Figure 3] FIG. 2 is a perspective view illustrating a rotating body. [Figure 4] FIG. 2 is a plan view illustrating a rotating body. [Figure 5] FIG. [Figure 6]FIG. 10 is a schematic diagram illustrating a function test of the measurement unit. [Figure 7] 10A and 10B are schematic diagrams illustrating another example of a function test of the measurement unit. [Figure 8] 10A and 10B are schematic diagrams illustrating an example of alignment between a rotating body and a housing. [Figure 9] FIG. 1 is a front view showing the overall design of a rotary position sensor according to an embodiment of the present invention. [Figure 10] FIG. 2 is a rear view showing the overall design of the rotary position sensor according to the embodiment. [Figure 11] FIG. 1 is a right side view showing the overall design of a rotary position sensor according to an embodiment of the present invention. [Figure 12] FIG. 1 is a left side view showing the overall design of a rotary position sensor according to an embodiment of the present invention. [Figure 13] FIG. 1 is a plan view showing the overall design of a rotary position sensor according to an embodiment of the present invention. [Figure 14] FIG. 2 is a bottom view showing the overall design of the rotary position sensor according to the embodiment. [Figure 15] FIG. 10 is an enlarged view of a portion AB in FIG. 9. [Figure 16] FIG. 10 is an enlarged view of a CD portion of FIG. 9. [Figure 17] FIG. 1 is a perspective view showing the overall design of a rotary position sensor according to an embodiment of the present invention. [Figure 18] FIG. 2 is a front view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 19] FIG. 2 is a rear view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 20] FIG. 2 is a right side view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 21] FIG. 2 is a left side view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 22] FIG. 2 is a plan view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 23] FIG. 2 is a bottom view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 24] FIG. 19 is an enlarged view of a portion EF in FIG. 18. [Figure 25] FIG. 19 is an enlarged view of a portion GH in FIG. 18. [Figure 26] FIG. 2 is a perspective view showing a partial design (part 1) of the rotary position sensor according to the present embodiment. [Figure 27] FIG. 2 is a front view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 28] FIG. 10 is a rear view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 29] FIG. 10 is a right side view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 30] FIG. 10 is a left side view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 31] FIG. 10 is a plan view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 32] FIG. 10 is a bottom view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. [Figure 33] FIG. 28 is an enlarged view of a portion IJ in FIG. 27. [Figure 34] FIG. 28 is an enlarged view of the KL portion of FIG. 27. [Figure 35] FIG. 1 is a perspective view showing a partial design (part 2) of the rotary position sensor according to the present embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components will be designated by the same reference numerals, and the description of components that have already been described will be omitted as appropriate.

[0026] (Rotary position sensor configuration) FIG. 1 is a perspective view illustrating a rotary position sensor according to the present embodiment. FIG. 2 is an exploded perspective view illustrating the configuration of the rotary position sensor according to this embodiment. The rotary position sensor 1 according to this embodiment is a device that includes a rotating body 10, a housing 20, and a measuring unit 30, and measures the relative position of the rotating body 10 with respect to the housing 20 using the measuring unit 30.

[0027] The rotating body 10 includes a cylindrical shaft portion 11 having a shaft hole 10h, and a flange portion 12 that is connected to the shaft portion 11 and extends radially outward from the shaft portion 11. In this embodiment, one of the radial directions of the rotating body 10 is referred to as the X direction, the other radial direction that is perpendicular to the X direction is referred to as the Y direction, and the direction along the rotation axis AX of the rotating body 10 (the axial direction of the shaft hole 10h) is referred to as the Z direction.

[0028] A holding portion 13 is provided in the shaft hole 10h of the shaft portion 11 to receive and hold the operating shaft S having a non-circular cross section when viewed in the Z direction. For example, the cross section of the operating shaft S when viewed in the Z direction may be approximately D-shaped, or may be approximately D-shaped with a protruding portion (a key portion). By receiving the operating shaft S having such a cross section, the holding portion 13 transmits the rotation operation of the operating shaft S to the rotating body 10.

[0029] The housing 20 is an exterior part and has a bearing part 21 through which the shaft part 11 of the rotor 10 is inserted. The bearing part 21 has a cylindrical part that rotatably and slidably fits with the shaft part 11 extending in the Z direction. The housing 20 also receives the measuring part 30 inside.

[0030] The measuring unit 30 measures the relative position of the rotating body 10 with respect to the housing 20. The measuring unit 30 includes a fixed measuring unit 31 attached to the housing 20 and a movable measuring unit 32 attached to the rotating body 10. The fixed measuring unit 31 has a substrate 311 and a resistor pattern 312 formed on the substrate 311. A hole 311h is provided in the substrate 311, and the substrate 311 is received in the housing 20 by fitting the bearing unit 21 into the hole 311h.

[0031] A plurality of terminals 313 are attached to the housing 20. Each of the plurality of terminals 313 is connected to the substrate 311 of the fixed measuring unit 31 by a connecting member 314. The connecting member 314 also serves to electrically connect the pattern 312 formed on the substrate 311 and the terminal 313.

[0032] The movable measuring unit 32 has a slider 322 made of a ring-shaped conductive member. The movable measuring unit 32 is attached to the periphery of the shaft unit 11 on the housing 20 side of the rotating body 10. The movable measuring unit 32 is disposed between the rotating body 10 and the fixed measuring unit 31, and rotates together with the rotation of the rotating body 10. The rotation of the movable measuring unit 32 brings the slider 322 into sliding contact with the pattern 312 of the fixed measuring unit 31. The rotation of the movable measuring unit 32 changes the contact position between the pattern 312 and the slider 322, and changes the path of the resistor in the pattern 312 that is conductive with the multiple terminals 313. This changes the resistance value between the multiple terminals 313, and the change in the relative position between the rotating body 10 and the housing 20 is measured.

[0033] In the above-mentioned measuring unit 30, an example has been shown in which the pattern 312 provided on the substrate 311 of the fixed measuring unit 31 is formed by a resistor, and the movable measuring unit 32 is provided with a slider 322 that makes sliding contact with the resistor, but a configuration in which a resistor pattern is provided on the movable measuring unit 32, and a slider that makes sliding contact with this resistor pattern is provided on the fixed measuring unit 31 may also be used.

[0034] In the rotary position sensor 1 according to this embodiment, an engagement portion 15 is provided on the periphery of the flange portion 12. When performing a functional test of the measurement unit 30 of the rotary position sensor 1, if the rotating body 10 is rotated by an external force, it is generally considered that an operating shaft S is inserted into the shaft hole 10h and a rotational force is applied by the operating shaft S, but this method may affect the shaft hole 10h.

[0035] As in this embodiment, by providing the engaging portion 15, the rotating body 10 can be rotated by applying an external force to the engaging portion 15, and a function test can be performed without touching the axial hole 10h. Furthermore, since the engaging portion 15 is located on the periphery of the rotating body 10, the operating accuracy can be improved by operating the engaging portion 15 provided on the radially outer side of the rotating body 10 rather than operating the portion of the axial hole 10h provided at the rotation center of the rotating body 10.

[0036] (Engagement part) FIG. 3 is a perspective view illustrating an example of a rotating body. FIG. 4 is a plan view illustrating the rotating body. FIG. 5 is a partially enlarged plan view of the engagement portion. The engagement portion 15 provided on the peripheral edge of the flange portion 12 of the rotating body 10 has an extension portion 151 that extends outward in the radial direction (e.g., the Y direction) of the rotating body 10 when viewed in the Z direction. In this embodiment, the engagement portion 15 has a first engagement portion 15A and a second engagement portion 15B that are arranged on either side of the rotation axis AX of the shaft portion 11. That is, the first engagement portion 15A and the second engagement portion 15B are provided on both sides of the center of the rotating body 10 in the Y direction. The first engagement portion 15A and the second engagement portion 15B each have an extension portion 151 that extends outward in the Y direction. In a configuration that includes the extension portion 151, the internal space of the rotating body 10 is wider than when the engagement portion 15 is recessed inside the rotating body 10, thereby increasing the degree of freedom in arranging the measurement unit 30.

[0037] Furthermore, when viewed in the Z direction (the direction along the rotation axis AX), the first engagement portion 15A and the second engagement portion 15B are configured to have line-symmetric shapes with respect to a first imaginary line L1 (see FIG. 4) that is along the X direction of the rotating body 10. Because the first engagement portion 15A and the second engagement portion 15B have line-symmetric shapes, a member that applies a force to the rotating body 10 can be brought into symmetrical contact with the rotating body 10, causing the rotating body 10 to rotate.

[0038] The extending portion 151 has a protruding portion 152 that protrudes in the X direction when viewed in the Z direction (the direction along the rotation axis AX). That is, the extending portion 151 that extends convexly outward in the Y direction from the peripheral edge of the flange portion 12 has a protruding portion 152 that protrudes in the X direction from the middle of the extending portion in the Y direction. For this reason, the length of the extension of the extending portion 151 in the X direction is configured to gradually increase from the base toward the outside in the Y direction. Since the protruding portion 152 is more easily contacted by members than other portions, it becomes easier for a member that applies a force from the outside to the rotating body 10 to engage with the engaging portion 15.

[0039] Here, it is preferable that the protruding portion 152 is configured with a curved line C when viewed in the Z direction. When the protruding portion 152 is configured with a curved line C, the contact between the member that applies force to the rotating body 10 and the engaging portion 15 becomes a point contact, thereby improving contact stability.

[0040] Further, when viewed in the Z direction, a recessed portion 121 having a shape in which the flange portion 12 is partially recessed may be provided continuously with the extending portion 151. The recessed portion 121 is a portion (for example, a linear portion) that is cut out inward from a position corresponding to the outer circumferential circle of the flange portion 12.

[0041] (Functional inspection of the measuring unit) FIG. 6 is a schematic diagram for explaining the function test of the measurement unit. In the rotary position sensor 1, the relative position (e.g., rotation angle, amount of rotation, presence or absence of rotation, etc.) of the rotating body 10 with respect to the housing 20 is measured by the measuring unit 30. For this reason, it is necessary to inspect using a function inspection device whether the measuring unit 30 accurately outputs a measurement value in response to the rotational movement of the rotating body 10.

[0042] In a function test of the measuring unit 30 using a function testing device, the rotating body 10 is rotated by a preset angle and a test is performed to see if the measurement value output from the measuring unit 30 is within a specified range. In addition, when a durability test is performed using a function testing device, the rotating body 10 is rotated back and forth at a specified angle repeatedly for a specified period of time and a test is performed to see if the measurement value is within a specified range. In either test, the rotating body 10 is rotated externally.

[0043] When the rotating body 10 has a shaft hole 10h as in the conventional case, it is conceivable to insert an operating shaft S for inspection into this shaft hole 10h and rotate it, but this could result in damage such as scratching or breaking the shaft hole 10h. Because the shaft hole 10h is the portion into which the operating shaft S is inserted when the rotary position sensor 1 is actually mounted on a product, if the shaft hole 10h is scratched or broken in this way during inspection, it could have an adverse effect on the operating accuracy during actual use.

[0044] Furthermore, if crush ribs 10b are provided on the inner surface of shaft hole 10h, it is not possible to crush crush ribs 10b during the inspection stage, so the operating shaft S for inspection must be inserted into shaft hole 10h while avoiding crush ribs 10b (for example, shallow enough so as not to reach crush ribs 10b). For this reason, when operating shaft S (see FIG. 1) is inserted into shaft hole 10h, it cannot be inserted deep enough, and rattle is likely to occur. Because shaft hole 10h is located at the center of rotation of rotor 10, it is significantly affected by rattle between operating shaft S and shaft hole 10h, making fine adjustments difficult and preventing high inspection accuracy.

[0045] In the rotary position sensor 1 according to this embodiment, the rotating body 10 is provided with an engaging portion 15, which is located on the periphery of the rotating body 10, and thus an external force can be applied using the engaging portion 15. Because the engaging portion 15 is provided on the periphery of the rotating body 10, even if there is play between this portion and the member that applies the force to the rotating body 10, the effect on the rotational operation is not as great as if there is play at the center of rotation (play between the operating axis S and the shaft hole 10h). Furthermore, because measurements can be performed without touching the shaft hole 10h, it is possible to avoid affecting the shaft hole 10h during inspection.

[0046] 6, an operating jig J1 is used that engages with each of the first and second engagement portions 15A and 15B from outside the rotating body 10. When the operating jig J1 is brought into contact with the rotating body 10 from outside, the operating jig J1 comes into contact with the curved lines C of the protruding portions 152 of the first and second engagement portions 15A and 15B. If the flange portion 12 has a recessed portion 121, interference can be avoided when the operating jig J1 contacts the engagement portions 15, making contact easier. Furthermore, since the extending portion 151 is provided continuous with the recessed portion 121, stable contact between the operating jig J1 and the engagement portions 15 can be ensured even if the extending portion 151 only extends to a small extent, which has the advantage of allowing the overall size of the rotary position sensor 1 to be reduced.

[0047] With the operating jig J1 engaged with the first engaging portion 15A and the second engaging portion 15B, the operating jig J1 is rotated by a predetermined angle. Then, the measurement value of the measuring unit 30 at this time is obtained, and it is inspected whether the measurement value is a specified value.

[0048] The first engagement portion 15A and the second engagement portion 15B have shapes that are line-symmetrical with respect to the first virtual line L1, and therefore, when the operation jig J1 is rotated, the operation jig J1 can be brought into symmetrical contact with the rotating body 10. In other words, when the operation jig J1 is rotated left or right, the first engagement portion 15A and the second engagement portion 15B have shapes that are line-symmetrical with respect to the first virtual line L1, and therefore, force can be applied stably from the operation jig J1 to the engagement portions 15B regardless of whether the operation jig J1 is rotated left or right, and the operability (rotation angle controllability) of the operation jig J1 is improved.

[0049] FIG. 7 is a schematic diagram illustrating another example of the function test of the measurement unit. 7 shows an example of inspection using an operating jig J2 that engages with one of the engaging portions 15. The operating jig J2 is configured to engage with one of the engaging portions 15, for example, the second engaging portion 15B. The operating jig J2 has a recess that engages with the second engaging portion 15B.

[0050] Here, it is preferable that the engaging portion 15 has an axisymmetric shape when viewed in the Z direction, with a second imaginary line L2 that runs along the radial direction of the rotating body 10 and passes through the inside of the engaging portion 15 as the axis of symmetry. This allows the operating jig J2 to stably apply force to the engaging portion 15 regardless of whether the rotating body 10 is rotated left or right, thereby improving the operability (rotation angle controllability) of the operating jig J2.

[0051] (Alignment of the rotating body and housing) FIG. 8 is a schematic diagram illustrating an example of alignment between the rotating body and the housing. 8, the housing 20 has a protrusion 22 that is provided to have an overlapping portion that overlaps with the engagement portion 15 of the rotating body 10 that is in a predetermined reference position when viewed in the Z direction. When a functional test of the measuring unit 30 is performed, the test is performed with the rotating body 10 in a predetermined reference position relative to the housing 20.

[0052] To align the rotating body 10 and the housing 20, the alignment jig J3 is positioned so that it contacts the overlapping portion of the protrusion 22 and the engaging portion 15. That is, the alignment jig J3 is brought into contact with both the protrusion 22 and the engaging portion 15, and the X-direction positions of the two are aligned when viewed in the Z direction. This allows the rotating body 10 to be positioned at a reference position. The alignment jig J3 may also be used as the operating jig J1. In this case, when performing inspection after alignment, the alignment jig J3 is shifted in the Z direction so that it does not contact the protrusion 22, and only the rotating body 10 is rotated.

[0053] Furthermore, the protrusion 22 may have a non-overlapping portion 23 located outside the engaging portion 15 when viewed in the Z direction. If the protrusion 22 has a non-overlapping portion 23 located outside the engaging portion 15, it becomes easier to visually (by visual inspection or image recognition) from the Z direction during alignment whether the rotating body 10 is in the reference position.

[0054] (Appearance (design) of rotary position sensor) 9 to 17 are diagrams showing the overall design of the rotary position sensor 1. FIG. 18 to 26 are diagrams showing partial designs (part 1) of the rotary position sensor 1. FIG. 27 to 35 are diagrams showing a partial design (part 2) of the rotary position sensor 1. FIG.

[0055] The "design description" of the overall design of the rotary position sensor 1 shown in FIGS. 9 to 17 is as follows. 9 to 17, the thin lines shown in the figures are all intended to identify the shape of the three-dimensional surface.

[0056] The "design description" of the partial design (part 1) of the rotary position sensor 1 shown in FIGS. 18 to 26 is as follows. 18 to 26, the portions indicated by solid lines (parts of the engaging portion 15 and the recessed portion 121) are portions that represent partial designs. 18 to 26, the thin lines shown in the figures are all intended to specify the shape of the three-dimensional surface.

[0057] The "Design Description" of the partial design (part 2) of the rotary position sensor 1 shown in FIGS. 27 to 35 is as follows. In FIGS. 27 to 35, the portions indicated by solid lines (parts of the engaging portion 15 and the recessed portion 121) are portions that represent partial designs. 27 to 35, the thin lines shown in the figures are all intended to specify the shape of the three-dimensional surface.

[0058] In this way, the rotary position sensor 1 according to this embodiment can transmit rotational motion from the operating jigs J1 and J2 to the rotating body 10 with high precision, making it possible to perform inspection without affecting the shaft hole 10h.

[0059] Although the present embodiment has been described above, the present invention is not limited to these examples. For example, the measuring unit 30 may be of a type other than an electrical resistance change type (e.g., a magnetic change type, an optical detection type, or a capacitance detection type). Furthermore, the rotating body 10 may be provided with one or three or more engaging units 15. Furthermore, those skilled in the art may appropriately add, delete, or modify components of the above-described embodiments, or appropriately combine features of the configuration examples of the embodiments, as long as they include the gist of the present invention. These are also included within the scope of the present invention. [Explanation of symbols]

[0060] 1...Rotary position sensor 10...Rotating body 10b... Crush Rib 10h...shaft hole 11...Shaft body 12...Flange 13...Holding part 15...Engagement part 15A…First engaging part 15B…Second engagement part 20…Housing 21...Bearing part 22...Protrusion 23…Non-overlapping part 30...Measuring unit 31...Fixed measuring unit 32... Movable measuring unit 121...Concave notch 151...Extending part 152...Protrusion 311... Circuit board 311h…hole 312...Pattern 313...Terminal 314...Connecting member 322...Slider AX...rotation axis C…Curve J1, J2...Operation jig J3: Alignment jig L1: First virtual line L2: Second virtual line S…Operation axis

Claims

1. a rotating body including a cylindrical shaft portion having a shaft hole and a flange portion connected to the shaft portion and extending radially outward from the shaft portion; a housing having a bearing portion through which the shaft portion of the rotating body is inserted; a measuring unit that measures the relative position of the rotating body with respect to the housing; Equipped with An engagement portion is provided on the periphery of the flange portion, When viewed in a direction along the rotation axis of the rotating body, the engaging portion has an extending portion that extends radially outward of the rotating body. A rotary position sensor characterized by:

2. 2. The rotary position sensor according to claim 1, wherein the extending portion has a protruding portion that protrudes in a direction intersecting the extending direction of the extending portion when viewed in a direction along the rotation axis of the rotating body.

3. 3. The rotary position sensor according to claim 2, wherein the protrusion is configured as a curved line when viewed in a direction along the rotation axis of the rotating body.

4. 2. The rotary position sensor according to claim 1, wherein the flange portion has a recessed shape that is partially recessed when viewed in a direction along the rotation axis of the rotating body, and the recessed portion is provided continuously with the extending portion.

5. A rotating body comprising a cylindrical shaft portion having an axial hole, and a flange portion connected to the shaft portion and extending radially outward from the shaft portion; a housing having a bearing portion through which the shaft portion of the rotating body is inserted; a measuring unit that measures the relative position of the rotating body with respect to the housing; Equipped with An engagement portion is provided on the periphery of the flange portion, The housing has a protrusion provided to have an overlapping portion that overlaps with the engaging portion of the rotating body at a reference position when viewed in a direction along the rotation axis of the rotating body. A rotary position sensor characterized by:

6. 6. The rotary position sensor according to claim 5, wherein the protrusion has a portion positioned outward from the engaging portion when viewed in a direction along the rotation axis of the rotating body.

7. 6. The rotary position sensor according to claim 1, wherein the shaft hole has a holding portion for receiving and holding an operating shaft having a non-circular cross section when viewed in a direction along the rotation axis of the rotating body.

8. the engaging portion has a first engaging portion and a second engaging portion disposed on opposite sides of a rotation axis of the rotating body, 6. The rotary position sensor according to claim 1, wherein, when viewed in a direction along the rotation axis of the rotating body, the first engagement portion and the second engagement portion have shapes that are symmetrical to each other with respect to a first imaginary line that is along the radial direction of the rotating body.

9. 6. The rotary position sensor according to claim 1, wherein, when viewed in a direction along the rotation axis of the rotating body, the engaging portion has an axisymmetric shape with a second imaginary line that runs radially through the interior of the engaging portion as an axis of symmetry.

10. 6. The rotary position sensor according to claim 1, wherein the measuring unit comprises a fixed measuring unit attached to the housing and a movable measuring unit attached to the rotating body.

11. 11. The rotary position sensor according to claim 10, wherein the fixed measuring portion has a resistor, and the movable measuring portion has a slider that is in sliding contact with the resistor.

12. 11. The rotary position sensor according to claim 10, wherein the movable measuring portion has a resistor, and the fixed measuring portion has a slider that is in sliding contact with the resistor.

13. 6. The rotary position sensor according to claim 1, further comprising crush ribs provided on an inner wall of the shaft hole.

14. 6. The rotary position sensor according to claim 1, wherein the engaging portion engages with an operating jig of a function inspection device of the measuring portion.

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