Cable with integrated sensor and rotation detection device

Abstract

The present application provides a cable with a sensor and a rotation detection device, which realizes miniaturization of a sensor portion and uniformity of outputs of two magnetic sensors built in the sensor portion. The cable (6) and the sensor portion (3) provided at the end of the cable (6) are provided. The sensor portion (3) has a pair of magnetic sensors (4) having a plate-shaped detection portion (40) including a magnetic detection element and a connection terminal (41) extending from the detection portion (40), and a housing portion (5) covering the pair of magnetic sensors (4). The pair of magnetic sensors (4) are arranged in parallel with the extension direction of the connection terminal (41) extending from the detection portion (40). The detection portion (40) is arranged obliquely with respect to an imaginary plane (7) perpendicular to the arrangement direction of the detection portion (40), and the absolute values of the oblique angles (θ) of the detection portion (40) with respect to the imaginary plane (7) are equal.

Description

Technical Field

[0001] This invention relates to cables with attached sensors and rotation detection devices. Background Technology

[0002] Currently, a rotation detection device is known, for example, for a bearing unit of a wheel, to detect the rotational speed of a rotating component that rotates together with the wheel. In this device, the rotational speed of the rotating component is detected by detecting changes in the magnetic field generated by a ring-shaped magnet (called the component being detected) mounted on the rotating component using a magnetic sensor located in the sensor section. The sensor section is integrally located at the end of a cable; a cable with a sensor section at its end is called a cable with an attached sensor.

[0003] Patent Document 1 discloses a rotation detection device in which two magnetic sensors are built into the sensor section for redundancy. Each of the two magnetic sensors has: a plate-shaped detection section containing a magnetic detection element that detects the magnetic field from the detected component; and a connecting terminal extending from the detection section. Patent Document 1 also discloses a structure in which two detection sections are arranged in the width direction of the detection section (a direction perpendicular to the extension direction of the connecting terminal, i.e., the length direction and the plate thickness direction), and a structure in which two detection sections overlap in the plate thickness direction.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-96828 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, when two detection units are arranged in the width direction of the detection unit, the sensor unit becomes larger. Furthermore, while overlapping two detection units in the thickness direction avoids this larger sensor unit, there is a concern that the outputs of the two magnetic sensors may differ significantly due to the different distances from the detected component between the two detection units. Considering the functional safety requirements specified in ISO 26262, it is desirable to make the outputs of the two magnetic sensors as equal (uniform) as possible, i.e., to homogenize the outputs of the two magnetic sensors.

[0009] Therefore, the object of the present invention is to provide a cable for an accessory sensor and a rotation detection device that achieves miniaturization of the sensor section and uniformity of the output of the two magnetic sensors built into the sensor section.

[0010] Solution for solving the problem

[0011] To address the aforementioned problems, the present invention provides a cable with an attached sensor, comprising a cable and a sensor portion disposed at an end of the cable. The sensor portion includes: a pair of magnetic sensors, each having a plate-shaped detection portion including a magnetic detection element and a connecting terminal extending from the detection portion; and a housing portion that covers the pair of magnetic sensors. The pair of magnetic sensors are arranged parallel to the extending direction of the connecting terminal extending from the detection portion. The detection portion is arranged at an angle relative to an imaginary surface perpendicular to the arrangement direction of the detection portion, and the absolute values ​​of the angles of inclination of the detection portion relative to the imaginary surface are equal.

[0012] Furthermore, in order to solve the above-mentioned problems, the present invention provides a rotation detection device comprising: the aforementioned cable with attached sensor; and a detection component mounted on a rotating component, having a plurality of magnetic poles arranged circumferentially around the rotation axis of the rotating component, wherein the sensor is mounted on a fixed component that does not rotate with the rotation of the rotating component, and the sensor is disposed opposite to the detection component such that the arrangement direction of the detection components is parallel to the axial end face of the detection component.

[0013] The effects of the invention are as follows.

[0014] According to the present invention, a sensor cable and a rotation detection device are provided that achieve miniaturization of the sensor section and uniformity of the output of the two magnetic sensors built into the sensor section. Attached Figure Description

[0015] Figure 1 (a) is a top view of a rotation detection device for a cable with an attached sensor using an embodiment of the present invention, and (b) is a perspective view showing the appearance of the cable with the attached sensor.

[0016] Figure 2 This is a perspective view of the cable with the attached sensor, omitting the resin molding part.

[0017] Figure 3 Is Figure 2 The three-dimensional view of the cover is further omitted in the text.

[0018] Figure 4 Is Figure 3 The three-dimensional view of the main body of the retainer is further omitted.

[0019] Figure 5 The diagrams illustrate the configuration of the magnetic sensor: (a) is a circumferential cross-sectional view, (b) is a top view viewed axially, and (c) is a schematic diagram viewed radially.

[0020] Figure 6It is a graph showing the relationship between the distance from the detected component and the magnetic flux density.

[0021] Figure 7 It is a three-dimensional view of the main body of the retainer.

[0022] Figure 8 (a) and (b) are three-dimensional views of the cover.

[0023] Figure 9 (a) and (b) are diagrams showing a modified example of the configuration of the sensor section, and (c) is a diagram showing a modified example of the configuration of the magnetic sensor.

[0024] Explanation of symbols

[0025] 1—Cable with sensor attached, 2—Detected component, 3—Sensor part, 31—Detection surface, 4—Magnetic sensor, 40—Detection part, 40a—Resin molded part, 40b—Detection position of magnetic field, 41—Connecting terminal, 5—Housing part, 6—Cable, 7—Imaginary surface, 51—Holding part, 52—Resin molded part. Detailed Implementation

[0026] [Implementation Method]

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0028] Figure 1 (a) is a top view of the rotation detection device using the cable with the attached sensor according to this embodiment, and (b) is a perspective view showing the appearance of the cable with the attached sensor. Figure 1 As shown in (a), the rotation detection device 10 includes a cable 1 with an attached sensor and a component 2 to be detected, as in this embodiment. The rotation detection device 10 is used, for example, to detect the rotational speed, i.e., wheel speed, of a wheel in a car.

[0029] (Component 2 being tested)

[0030] The component being detected 2 is mounted on a rotating component (not shown) and rotates together with the rotating component. When the rotation detection device 10 is used to detect wheel speed, the rotating component is, for example, an inner ring on which a wheel is mounted and rotates together with the wheel. The component being detected 2 is formed in an annular shape and is also formed in a plate shape perpendicular to the rotation axis of the rotating component, for example, mounted on the outer circumferential surface of the rotating component.

[0031] In this embodiment, the detected component 2 is composed of a magnetic encoder having multiple magnetic poles arranged circumferentially around the rotation axis O of the rotating component. The detected component 2 has N magnetic poles and S magnetic poles arranged alternately circumferentially.

[0032] (Cable 1 with sensor)

[0033] Figure 2 This is a perspective view of the cable 1 with the sensor attached, omitting the resin molding part. Figure 3 Is Figure 2 The three-dimensional view of the cover is further omitted in the text. Figure 4 Is Figure 3 The perspective view of the retaining component is further omitted. For example... Figures 1 to 4 As shown, the cable 1 with the sensor includes a cable 6 and a sensor part 3 located at one end of the cable 6.

[0034] The sensor unit 3 has a pair of magnetic sensors 4 and a housing unit 5 that covers the pair of magnetic sensors 4. The sensor unit 3 is located at the end of the cable 6 and is mounted on a fixed member that does not rotate with the rotation of the rotating component. When the rotation detection device 10 is used to detect wheel speed, the fixed member is, for example, a steering knuckle that is connected to the body of the car and supports the outer ring.

[0035] The sensor unit 3 is disposed opposite to the detected component 2. In this embodiment, the side of the end of the sensor unit 3 opposite to the extension side of the cable 6, that is, the side of the front end (the surface parallel to the cable extension direction, the extension direction of the connecting terminal 41 described below, and the arrangement direction of the detection unit 40) faces the axial end surface of the detected component 2. Hereinafter, the surface opposite to the detected component will be referred to as the detection surface 31. The detection surface 31 and the axial end surface of the detected component 2 are opposite each other in the axial direction of the detected component 2. The cable 6 extends radially outward from the sensor unit 3 towards the detected component 2.

[0036] The cable 6 has two pairs of wires 61 corresponding to a pair of magnetic sensors 4. Each wire 61 has: a center conductor 61a made of stranded conductors of copper or other conductive materials; and an insulator 61b covering the outer periphery of the center conductor 61a and made of a resin such as cross-linked polyethylene. The cable 6 also has a sheath 62 that covers both pairs (four wires) of wires 61.

[0037] At the end of cable 6, two pairs of wires 61 protrude from sheath 62, and at the end of each wire 61, a center conductor 61a protrudes from insulator 61b. The front end of the center conductor 61a protruding from insulator 61b is electrically connected to the connection terminal 41 of the corresponding magnetic sensor 4 by welding.

[0038] (Magnetic sensor 4)

[0039] The magnetic sensor 4 has: a plate-shaped detection section 40 containing a magnetic detection element (not shown) for detecting the magnetic field from the detected component 2; and a pair of connection terminals 41 extending from the detection section 40.

[0040] The magnetic detection element is composed of an MR element (magnetoresistive element) that detects a magnetic field in a direction perpendicular to the thickness direction of the detection section 40, i.e., parallel to the surface of the detection section 40. In this embodiment, a GMR (Giant MagnetoResistive Effect) element is used as the magnetic detection element. Alternatively, an AMR (Anisotropic Magneto Resistive) element or a TMR (Tunneling Magneto Resistive) element can also be used. Furthermore, by using different types of MR elements (such as GMR elements and TMR elements) as magnetic detection elements for both detection sections 40, reliability can be improved.

[0041] The detection unit 40 includes a magnetic detection element, a signal processing circuit (not shown), and a resin molded part 40a that covers the magnetic detection element and the signal processing circuit. The detection unit 40 is formed into a plate that is roughly rectangular (the shape after chamfering the two corners connected to the long side of one side of the rectangle) when viewed from above.

[0042] A pair of connecting terminals 41 extend from one long side of the detection unit 40 (the long side not connected to the chamfered corner) in a direction perpendicular to the long side, and the two connecting terminals 41 are formed parallel to each other. The two connecting terminals 41 are arranged in a straight line without any bends. In this embodiment, the two connecting terminals 41 are formed in the shape of a strip (an elongated plate), and the center conductor 61a of the corresponding wire 61 is electrically connected to its front end (the end opposite to the detection unit 40).

[0043] A capacitor element for noise suppression is connected between two connection terminals 41, and a capacitor element protection portion 42 formed by resin molding is provided to cover the capacitor element and the connection terminals 41 around it. Hereinafter, the extending direction of the connection terminals 41 is referred to as the length direction of the detection portion 40, and the direction perpendicular to the length direction and the plate thickness direction is referred to as the width direction of the detection portion 40. Furthermore, the end of the detection portion 40 opposite to the extending side of the connection terminals 41 (the end on the long side connected to the chamfered corner) is referred to as the front end. The front end of the detection portion 40 of the magnetic sensor 4 is provided facing the front end of the sensor portion 3.

[0044] Figure 5 These are diagrams illustrating the configuration of magnetic sensor 4: (a) is a circumferential cross-sectional view, (b) is a top view viewed axially, and (c) is a schematic diagram viewed radially. Figure 5As shown in (a) to (c), the detection sections 40 of a pair of magnetic sensors 4 are arranged side by side. In this embodiment, the two magnetic sensors 4 are configured such that the extension directions of the connection terminals 41 extending from the detection sections 40 are parallel, and the detection sections 40 are arranged at an angle relative to the imaginary surface 7 perpendicular to the arrangement direction of the detection sections 40, and the absolute values ​​of the angle θ of the detection sections 40 relative to the imaginary surface 7 are equal.

[0045] In this embodiment, the detection units 40 of the two magnetic sensors 4 are configured to be symmetrical with respect to the imaginary surface 7, and are configured to be approximately V-shaped when viewed radially. Furthermore, the tilt angle θ of the two detection units 40 may vary slightly due to manufacturing tolerances, allowing for an error of approximately 5 degrees.

[0046] Therefore, the detection parts 40 of the two magnetic sensors 4 are also arranged at an angle relative to the detection surface 31, and are also arranged at an angle relative to the axial end face of the detected component 2.

[0047] The sensor unit 3 is configured such that the arrangement direction of the detection units 40 is parallel to the axial end face of the component being detected 2. In this embodiment, the sensor unit 3 is configured such that the extending direction of the connecting terminal 41 extending from the detection unit 40 is radially aligned with the rotation axis O of the rotating component. Furthermore, the sensor unit 3 is configured such that the detection units 40 of the two magnetic sensors 4 face the axial end face of the component being detected 2.

[0048] By configuring it in this way, the sensor unit 3 can be made smaller compared to the case where the two magnetic sensors 4 are arranged in the width direction of the detection unit 40. Furthermore, compared to the case where the two magnetic sensors 4 are arranged in the thickness direction of the detection unit 40, the distance between the two magnetic sensors 4 and the detection unit 40 becomes equal, thus enabling the outputs of the two magnetic sensors 4 to be equal and achieving uniformity.

[0049] Furthermore, in this embodiment, since bending of the connecting terminal 41 is not required, manufacturing is easier and risks such as damage to the detection unit 40 caused by bending are avoided. Also, since bending of the connecting terminal 41 is not required, the sensor unit 3 as a whole can be made more compact.

[0050] The detection section 40 of the magnetic sensor 4 has a plurality of (two to five) magnetic detection elements arranged in the width direction. Figure 5 In (c), the symbol 40b represents the detection position of the magnetic field detected by the magnetic detection element. The detection unit 40 is configured to calculate the difference between the detected values ​​of the magnetic flux density at the two detection positions 40b, and output the calculated difference via the connection terminal 41.

[0051] In this embodiment, the detection unit 40 is arranged at an angle relative to the detection surface 31, so that the detection position 40b of the magnetic field on one side (the detection position 40b of the magnetic field on one side away from the imaginary surface 7) is arranged away from the detected component 2. Figure 6 As shown, the magnetic flux density from the detected component 2 increases sharply as it approaches the detected component 2 and decreases as it moves away from the detected component 2. Therefore, by bringing the sensor unit 3 as close as possible to the detected component 2, the magnetic flux density detected at the detection position 40b of the magnetic field on the side closest to the detected component 2 is increased, thus ensuring the detection accuracy of the magnetic sensor 4 as a whole.

[0052] The tilt angle θ (absolute value) of the detection unit 40 relative to the imaginary surface 7 is preferably 30 degrees or more and 60 degrees or less. By making the tilt angle θ 30 degrees or more, it is possible to suppress the situation where the detection position 40b of the magnetic field on the side away from the imaginary surface 7 is too far away from the detected component 2, which would lead to a decrease in detection accuracy. Furthermore, by making the tilt angle θ 60 degrees or less, it is possible to prevent the sensor unit 3 from becoming too large. In this embodiment, the tilt angle θ (absolute value) of the detection unit 40 relative to the imaginary surface 7 is set to 45 degrees.

[0053] Furthermore, in this embodiment, the sensor unit 3 is arranged such that the interval between the two detection units 40 narrows as it approaches the detected component 2, with the side of the two detection units 40 with a narrower interval facing the detected component 2. However, this is not a limitation; the side of the two detection units 40 with a wider interval may also be positioned... Figure 5 The upper side of (c) is opposite to the component 2 being tested.

[0054] (Shell section 5)

[0055] The housing portion 5 has a retainer 51 for holding the two magnetic sensors 4 and a resin molded portion 52 covering the periphery of the retainer 51. The retainer 51 has a retainer body 53 and a cover portion 54.

[0056] The retainer 51 is a component used to protect the magnetic sensor 4 and the connection between the magnetic sensor 4 and the cable 6 when the resin molding part 52 is molded. It is formed in advance by injection molding or the like. The resin molding part 52 is formed by molding resin with the two magnetic sensors 4 and the cable 6 placed in the retainer 51, thereby forming the housing part 5.

[0057] Figure 7 This is a three-dimensional view of the retaining body 53. For example... Figure 3 and Figure 7As shown, the main body 53 of the retainer includes: a detection section storage section 531 for housing the detection section 40; a connection terminal storage section 532 communicating with the detection section storage section 531 and housing the connection terminal 41; and a cable storage section 533 communicating with the connection terminal storage section 532 and housing the cable 6. The bottom surface of the detection section storage section 531 is formed in a V-shape and is configured to hold the detection section 40 in an inclined state. Similarly, the bottom surface of the connection terminal storage section 532 is also formed in a V-shape and has a rib-shaped protrusion 532a that protrudes between a pair of connection terminals 41 to limit the position of the magnetic sensor 4. Furthermore, a storage groove 532b for housing the capacitor element protection section 42 is formed in the connection terminal storage section 532. In addition, a partition wall 55 is provided that protrudes upward from the center (bottom) of the V-shaped connection terminal storage section 532. The partition 55 serves two purposes: isolating the connection terminals 41 of the two magnetic sensors 4 to prevent them from contacting each other and short-circuiting, and engaging with the through hole of the cover 54 to restrict the position of the cover 54. A sheath retaining portion 533a is formed at the cable extension end of the cable storage portion 533 to retain the end of the sheath 62 of the cable 6. The inner circumferential surface of the sheath retaining portion 533a is formed in an arc shape following the outer shape of the sheath 62.

[0058] By using the sheath retaining part 533a to hold the sheath 6, the resin pressure during the molding of the resin molding part 52 can be overcome to hold the cable 6, and the breakage of the wire 61 and the connection between the wire 61 and the connecting terminal 41 caused by the resin pressure can be suppressed. Furthermore, not limited to this, the retaining member 51 can also be used to hold only the wire 61. In this case, it is easier to miniaturize the retaining member 51 and the sensor part 3 as a whole.

[0059] Figure 8 (a) and (b) are perspective views of the cover portion 54. The cover portion 54 is provided to block the opening of the retainer body 53 and holds two magnetic sensors 4 between itself and the retainer body 53. It is a component used to prevent the magnetic sensors 4 from falling off the retainer body 53. When viewed from the front end side of the sensor portion 3, the cover portion 54 is generally trapezoidal in shape. Its two inclined surfaces 541 press and hold the magnetic sensors 4 against the bottom surfaces of the detection portion receiving portion 531 and the connection terminal receiving portion 532. A through hole 542 for fitting the partition wall 55 is formed in the cover portion 54. By fitting the partition wall 55 into the through hole 542, the cover portion 54 is aligned with the retainer body 53, and the cover portion 54 is fixed to the retainer body 53.

[0060] like Figure 1As shown in (b), the resin molding portion 52 is integrally formed with the main body portion 520 and the flange portion 521. The main body portion 520 covers the magnetic sensor 4, the end of the cable 6, and the retainer 51. The flange portion 521 is used to fix the sensor portion 3 to the fixing member. A bolt hole 522 is formed in the flange portion 521 for a bolt (not shown) for fixing the sensor portion 3 to the fixing member to pass through. A collar 523 made of metal is provided in the bolt hole 522 and along the inner circumferential surface of the bolt hole 522. The collar 523 is used to suppress the deformation of the flange portion 521 when the bolt is fixed.

[0061] In this embodiment, the portion of the housing 5 disposed between the detection unit 40 and the detected component 2 is composed solely of the retaining member 51. That is, the portion of the housing 5 disposed between the detection unit 40 and the detected component 2 is not covered by the resin molding portion 52, and the retaining member 51 is exposed and directly faces the detection surface 31 opposite to the detected component 2. In this embodiment, the retaining member body 53 near the detection unit 40 is exposed, and the back side of the detection unit receiving portion 531 (the side opposite to the opening of the retaining member body 53) constitutes the detection surface 31. Therefore, the portion of the housing 5 disposed between the detection unit 40 and the detected component 2 can be constituted by the thickness of only one component (the retaining member 51), allowing the housing 5 at the front end of the sensor unit 3 to be very thin. As a result, the reduction in detection accuracy caused by the detection unit 40 being too far away from the detected component 2 can be suppressed.

[0062] When manufacturing the cable 1 with the attached sensor, firstly, the center conductor 61a of each wire 61 is soldered to the connection terminal 41 of the two magnetic sensors 4 (see reference). Figure 4 Next, place the two magnetic sensors 4 and the ends of the cable 6 into the retainer body 53 (see reference). Figure 3 The cover 54 is mounted on the retainer body 53, and the retainer body 53 and the cover 54 are used to clamp the two magnetic sensors 4 (see reference). Figure 2 The resin molding part 52 is formed by resin molding in this state, thereby obtaining the cable 1 with the sensor attached.

[0063] (Modified Example)

[0064] In this embodiment, the sensor unit 3 is arranged such that the extending direction of the connecting terminal 41 is aligned with the radial direction of the detected component 2 (so that the front end of the detection unit 40 faces the rotation axis O of the detected component 2), but if Figure 9 As shown in (a) and (b), the sensor section 3 can also be arranged with the front end of the detection section 40 facing the axial end face of the component 2 being detected. In this way, the installation direction of the sensor section 3 can be appropriately selected in the cable 1 with the sensor attached, thereby increasing its versatility.

[0065] Furthermore, in this embodiment, the detection unit 40 is arranged symmetrically with respect to the imaginary surface 7. However, the detection unit 40 only needs to have the same absolute value of the tilt angle θ relative to the imaginary surface 7 (within a range of approximately ±5 degrees). Figure 9 As shown in (c), the detection units 40 are arranged in parallel.

[0066] (The role and effects of the implementation method)

[0067] As described above, in the cable 1 with the included sensor in this embodiment, a pair of magnetic sensors 4 are arranged in a manner parallel to the extension direction of the connection terminal 41 extending from the detection unit 40, and the detection unit 40 is arranged obliquely relative to the imaginary surface 7 which is perpendicular to the arrangement direction of the detection unit 40, and the absolute values ​​of the oblique angle θ of the detection unit 40 relative to the imaginary surface 7 are equal.

[0068] By arranging the detection units 40 at an angle, the sensor unit 3 can be miniaturized compared to arranging the detection units 40 in the width direction. Furthermore, the distance between the detected component 2 and the two detection units 40 can be made equal, achieving uniformity in the output of the two magnetic sensors 4. Moreover, the arrangement direction of the sensor unit 3 in the cable 1 with the sensor attached can also be set as follows: Figure 5 As shown in (a) and (b), one side of the detection section 40 is positioned opposite the axial end face of the component 2 being detected, or as shown in (a) and (b). Figure 9 As shown in (a) and (b), the front end of the detection unit 40 is positioned opposite the axial end face of the component 2 being detected in any configuration direction, thus providing high versatility.

[0069] (Summary of Implementation Methods)

[0070] Next, the technical ideas learned from the embodiments described above will be described by reference to symbols and the like. However, the symbols and the like used in the following description are not intended to limit the constituent elements in the claims to the components specifically shown in the embodiments.

[0071] [1] A cable 1 with an attached sensor includes a cable 6 and a sensor portion 3 provided at the end of the cable 6. The sensor portion 3 includes: a pair of magnetic sensors 4, each having a plate-shaped detection portion 40 containing a magnetic detection element and a connecting terminal 41 extending from the detection portion 40; and a housing portion 5, which is provided to cover the pair of magnetic sensors 4. The pair of magnetic sensors 4 are arranged in a manner parallel to the extension direction of the connecting terminal 41 extending from the detection portion 40. The detection portion 40 is arranged obliquely relative to an imaginary surface 7 perpendicular to the arrangement direction of the detection portion 40, and the absolute values ​​of the oblique angle θ of the detection portion 40 relative to the imaginary surface 7 are equal.

[0072] [2] According to the cable 1 with the attached sensor described in [1], the detection part 40 of the pair of magnetic sensors 4 is arranged symmetrically with respect to the imaginary surface 7.

[0073] [3] According to the cable 1 with the attached sensor described in [1] or [2], the magnetic detection element is composed of a magnetoresistive effect element that detects the magnetic field in a direction perpendicular to the thickness direction of the detection section 40.

[0074] [4] The cable 1 with the sensor as described in any one of [1] to [3] has the connecting terminal 41 arranged in a straight line without any bends.

[0075] [5] A rotation detection device 10 includes: a cable 1 with an attached sensor as described in any one of [1] to [4]; and a detection component 2, which is mounted on a rotating component and has a plurality of magnetic poles arranged circumferentially around the rotation axis of the rotating component, wherein the sensor part 3 is mounted on a fixed component that does not rotate with the rotation of the rotating component, and the sensor part 3 is arranged opposite to the detection component in such a way that the arrangement direction of the detection part 40 is parallel to the axial end face of the detection component.

[0076] [6] According to the rotation detection device 10 described in [5], the housing portion 5 has a retaining member 51 for holding the pair of magnetic sensors and a resin molding portion 52 covering the periphery of the retaining member 51. The portion of the housing portion 5 disposed between the detection portion 40 and the detected component 2 is composed only of the retaining member 51.

[0077] [7] According to the rotation detection device 10 described in [5] or [6], the sensor part 3 is arranged such that the extension direction of the connection terminal 41 extending from the detection part 40 is consistent with the radial direction centered on the rotation axis of the rotating component, and the detection part 40 of the pair of magnetic sensors 4 is arranged such that it faces the axial end face of the detected component 2.

[0078] [8] According to the rotation detection device 10 described in [5] or [6], the sensor part 3 is arranged such that the end of the detection part 40 of the magnetic sensor 4 opposite to the extension side of the connection terminal 41, that is, the front end, faces the axial end face of the detected component 2.

[0079] The embodiments of the present invention have been described above, but the embodiments described above do not limit the invention as claimed. Furthermore, it should be noted that all combinations of features described in the embodiments are not necessarily necessary for solving the problems of the invention. Moreover, the present invention can be implemented with appropriate modifications without departing from its spirit.

Claims

1. A cable with a sensor, characterized by comprising a cable and a sensor portion provided at an end portion of the cable, the sensor portion having: a pair of magnetic sensors each having a plate-shaped detection portion including a magnetic detection element and a connection terminal extending from the detection portion; and a housing portion provided so as to cover the pair of magnetic sensors, the pair of magnetic sensors being arranged in parallel with the extending direction of the connection terminal extending from the detection portion, the detection portions being arranged obliquely with respect to an imaginary plane perpendicular to the arrangement direction of the detection portions, and the absolute values of the oblique angles of the detection portions with respect to the imaginary plane being equal.

2. The cable with a sensor according to claim 1, characterized in that the detection portions of the pair of magnetic sensors are arranged in face symmetry with respect to the imaginary plane.

3. The cable with a sensor according to claim 1 or 2, characterized in that the magnetic detection element is constituted by a magnetoresistance effect element that detects a magnetic field in a direction perpendicular to the plate thickness direction of the detection portion.

4. The cable with a sensor according to claim 1 or 2, characterized in that the connection terminal is provided in a straight line shape without having a bent portion.

5. The cable with a sensor according to claim 3, characterized in that the connection terminal is provided in a straight line shape without having a bent portion. comprising:

6. A rotation detecting device characterized by comprising: the cable with a sensor according to any one of claims 1 to 5; and a detected member that is attached to a rotating member and is provided with a plurality of magnetic poles along a circumferential direction centered on the rotation axis of the rotating member, the sensor portion being attached to a fixed member that does not rotate in conjunction with the rotation of the rotating member, and the sensor portion being arranged so as to face the detected member with the arrangement direction of the detection portions parallel to the axial end surface of the detected member.

7. The rotation detection device according to claim 6, characterized in that the housing portion has a holder that holds the pair of magnetic sensors and a resin molded portion that covers the periphery of the holder, the portion of the housing portion arranged between the detection portions and the detected member is constituted only by the holder.

8. The rotation detection device according to claim 6 or 7, characterized in that the sensor portion is arranged so that the extending direction of the connection terminal extending from the detection portion coincides with the radial direction centered on the rotation axis of the rotating member, and the detection portions of the pair of magnetic sensors face the axial end surface of the detected member.

9. The rotation detection device according to claim 6 or 7, characterized in that the sensor portion is arranged so that the end portion, i.e., the front end portion, of the detection portion of the magnetic sensor on the side opposite to the extending side of the connection terminal faces the axial end surface of the detected member. ​

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