Angle sensor

Abstract

To provide an angle sensor that offers improved detection accuracy.SOLUTION: An angle sensor 1 comprises: a cylinder 10 having a side surface 11 extending in a circumferential direction; and a coil 30 fixed onto the side surface 11. On the side surface 11 of the cylinder 10, multiple grids 20 aligned in the circumferential direction and an axial X direction are provided, and a conductive wire 31 forming the coil 30 is fitted in gaps between the multiple grids 20.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to an angle sensor, and particularly to an inductive angle sensor.

Background Art

[0002] Conventionally, various sensors have been used to detect the rotational angle of a motor or the like. Among such angle sensors for detecting the rotational angle, there is an inductive sensor (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional inductive sensors have room for improvement in detection accuracy.

[0005] Therefore, an object of the present invention is to provide an angle sensor capable of improving detection accuracy.

Means for Solving the Problems

[0006] An angle sensor according to an aspect of the present invention includes a cylinder having a side surface extending in the circumferential direction, and a coil fixed to the side surface, wherein a plurality of lattice bodies arranged in the circumferential direction and the axial direction are provided on the side surface of the cylinder, and a conductor forming the coil is fitted in a gap between the plurality of lattice bodies.

Brief Description of the Drawings

[0007]

Figure 1

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Figure 10

Figure 11

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Embodiments for Carrying Out the Invention

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the drawings, not all of the plurality of components are labeled, and in some cases, the labels of some of the plurality of components are omitted. FIG. 1 is a diagram schematically showing the configuration of an angle sensor 1 according to an embodiment of the present invention, and is a partially transparent perspective view schematically showing the internal configuration through a part of the members of the angle sensor 1. FIG. 2 is a perspective view schematically showing the angle sensor 1, FIG. 3 is a front view schematically showing the angle sensor 1, and FIG. 4 is a side view schematically showing the angle sensor 1. Further, FIG. 5 is an exploded perspective view schematically showing the configuration of a stator 3 included in the angle sensor 1. As shown in FIGS. 1 to 5, the angle sensor 1 includes a cylinder 10 having a side surface 11 extending in the circumferential direction, and a coil 30 fixed to the side surface 11. On the side surface 11 of the cylinder 10, a plurality of grating bodies 20 arranged in the circumferential direction and the axial direction (the direction of the axis x) are provided, and a conductor 31 forming the coil 30 is fitted in the gap between the plurality of grating bodies 20. Hereinafter, the configuration of the angle sensor 1 will be specifically described. The axis x is the rotation axis of the angle sensor 1, and the circumferential direction is the direction around the axis x. Also, the direction orthogonal to the axis x is the radial direction.

[0009] Specifically, for example, as shown in FIGS. 1 to 4, the angle sensor 1 includes a rotor 2 which is a rotating body and a stator 3. The rotor 2 has a cylinder 40 and a plurality of conductors 5 fixed to the cylinder 40. The stator 3 includes the above-described cylinder 10 and coil 30. As shown in FIGS. 2 to 4, in the angle sensor 1, the rotor 2 is disposed inside the stator 3, and the rotor 2 and the stator 3 face each other in the radial direction of the cylinder 40. Note that FIGS. 2 to 4 show the rotor 2 and the stator 3 in a predetermined positional relationship. This predetermined positional relationship is an example of the positional relationship between the rotor 2 and the stator 3 in the usage state where the angle sensor 1 is attached to the application target.

[0010] As shown in FIGS. 1 to 4, the cylinder 40 of the rotor 2 is a cylindrical member extending along the axis x. In FIG. 1, the inside of the cylinder 40 is shown transparently. The cylinder 40 of the rotor 2 is attached to a rotating member of an external device that is the application target of the angle sensor 1, such that the axis x coincides or substantially coincides with the rotation axis of the rotating member of the external device. For example, as shown in FIGS. 1 to 4, the cylinder 40 of the rotor 2 has an inner peripheral surface 41 that is a cylindrical surface extending along a cylindrical surface centered on the axis x, and an outer peripheral surface 42 that is a cylindrical surface facing away from the inner peripheral surface 41 on the outer side in the radial direction (hereinafter also referred to as the “outer peripheral side”). Further, the cylinder 40 has end surfaces 43 and 44 that are surfaces facing in the respective directions in which the axis x extends. The inner peripheral surface 41 and the outer peripheral surface 42 extend between the end surface 43 and the end surface 44. The application target of the angle sensor 1 is, for example, a motor, and the shaft of the motor is passed through the inner peripheral surface 41 of the cylinder 40 of the rotor 2, and the rotor 2 is fixed to the shaft. The cylinder 40 is made of, for example, a resin material, a non-magnetic material, a non-conductive material, etc. Note that the non-magnetic material may have non-conductivity.

[0011] As shown in FIG. 1, the cylinder 40 has a conductor structure 4. The conductor structure 4 is fixed to the cylinder 40. The conductor structure 4 is formed of conductors. For example, as shown in FIG. 1, it is composed of a plurality of conductors 5. The plurality of conductors 5 are arranged, for example, in the circumferential direction around the axis x. As schematically shown in FIG. 1, the plurality of conductors 5 form a cylindrical conductor structure 4 that extends annularly around the axis x. The conductor 5 may be a member having conductivity (a member capable of generating a so-called eddy current or induced current (electric current) in one plane), for example, a metal body 5. Hereinafter, as an example, it is assumed that the angle sensor 1 has a metal body 5 as the conductor 5. The plurality of metal bodies 5 are arranged at a predetermined distance from each other in the circumferential direction of the cylinder 40. That is, two adjacent metal bodies 5 are separated from each other by a predetermined distance around the axis x. The plurality of conductors 5 are arranged, for example, at equal angular intervals or substantially equal angular intervals in the circumferential direction along the cylindrical surface with the axis x as the central axis. The plurality of metal bodies 5 have, for example, a curved shape. The plurality of metal bodies 5 may be connected to each other. The plurality of metal bodies 5 are connected by one or a plurality of connecting parts, and the one or a plurality of connecting parts may be formed of a non-conductive member (e.g., resin) or a conductive member (e.g., metal), and the plurality of metal bodies 5 may be electrically connected.

[0012] As shown in FIG. 1, the plurality of metal bodies 5 are provided inside the cylinder 40. The whole of the metal body 5 may be buried inside the cylinder 40, or a part of each metal body 5 may be exposed on the surface of the cylinder 40. Also, the plurality of metal bodies 5 may be attached to the surface of the cylinder 40, for example, to the outer peripheral surface 42. In this case, a part of the metal body 5 may be buried inside the cylinder 40.

[0013] As shown in FIGS. 1 to 5, the stator 3 has the above-described cylinder 10 and a frame 6. The frame 6 is a member that supports the cylinder 10. The frame 6 has, for example, two members, and the frame 6 can be divided into a first frame 60 and a second frame 70. FIG. 6 is a perspective view showing a schematic configuration of the cylinder 10, and FIG. 7 is a side view showing a schematic configuration of the cylinder 10.

[0014] As shown in FIGS. 5 to 7, the cylinder 10 is a cylindrical member extending along the axis x. For example, in addition to the side surface 11, it has a first end portion 12 and a second end portion 13. Further, the cylinder 10 has an inner peripheral surface 14. The side surface 11 is a surface facing the outer peripheral side of the cylinder 10. The inner peripheral surface 14 is a surface facing the inner peripheral side of the cylinder 10 and is radially opposite to the side surface 11. The first end portion 12 and the second end portion 13 are both end portions in the direction of the axis x of the cylinder 10. The cylinder 10 has, for example, a shape along a cylindrical surface centered on the axis x, and the side surface 11 extends, for example, along a cylindrical surface or a substantially cylindrical surface centered on the axis x. The inner peripheral surface 14 extends, for example, on a cylindrical surface or a substantially cylindrical surface centered on the axis x. Also, the first end portion 12 and the second end portion 13 extend, for example, in an annular shape or a substantially extended annular shape.

[0015] As described above, the side surface 11 is provided with a plurality of lattice bodies 20 arranged in the circumferential direction and in the direction of the axis x which is the axial direction. As shown in FIGS. 6 and 7, each of the plurality of lattice bodies 20 is a portion protruding columnarly to the outer peripheral side, and is adjacent to other lattice bodies 20 with a gap therebetween. The plurality of lattice bodies 20 form lattice grooves 21 which are lattice-shaped grooves on the side surface 11. The lattice grooves 21 are grooves formed by connecting the gaps between adjacent lattice bodies 20. The lattice grooves 21 are, for example, as shown in FIGS. 6 and 7, a plurality of first direction grooves 21a which are grooves extending along a helix inclined in one direction in the circumferential direction (grooves extending in the direction of arrow a in FIG. 7), and a plurality of second direction grooves 21b which are grooves extending along a helix inclined in the other direction in the circumferential direction (grooves extending in the direction of arrow b in FIG. 7). The plurality of first direction grooves 21a are, for example, arranged at equal intervals or substantially equal intervals in the circumferential direction. Similarly, the plurality of second direction grooves 21b are, for example, arranged at equal intervals or substantially equal intervals in the circumferential direction. As shown in FIGS. 6 and 7, each of the plurality of first direction grooves 21a intersects one or two or more second direction grooves 21b. Similarly, each of the plurality of second direction grooves 21b intersects one or two or more first direction grooves 21a.

[0016] On side surface 11, a plurality of lattice bodies 20 are arranged side by side in the circumferential direction, for example, to form a circumferential row, and are arranged side by side in the circumferential direction so as to form a plurality of circumferential rows. Also, on side surface 11, a plurality of lattice bodies 20 are arranged side by side in the axial direction of axis x to form a row in the axial direction of axis x, and are arranged side by side in the axial direction of axis x so as to form a plurality of rows in the axial direction of axis x. The lattice bodies 20 of all the rows of the plurality of circumferential rows of lattice bodies 20 may be arranged in the axial direction of axis x, or the lattice bodies 20 of some of the rows of the plurality of circumferential rows of lattice bodies 20 may be arranged in the axial direction of axis x. Similarly, the lattice bodies 20 of all the rows of the plurality of rows of lattice bodies 20 in the axial direction of axis x may be arranged in the circumferential direction, or the lattice bodies 20 of some of the rows of the plurality of rows of lattice bodies 20 in the axial direction of axis x may be arranged in the circumferential direction.

[0017] The cross-sectional shapes of the plurality of lattice bodies 20 are, for example, different for each circumferential row. Note that this cross-sectional shape is the shape in a cross-section orthogonal to the radial direction, for example, the shape of a cross-section by a cylindrical surface centered on axis x. Also, this cross-sectional shape is, for example, the shape of a cross-section by a plane orthogonal to the radial direction. Note that the plurality of lattice bodies 20 may have the same shape in any one of the plurality of circumferential rows, and may have different shapes for each row in the other rows of the plurality of circumferential rows. Similarly, for example, the cross-sectional shapes of the plurality of lattice bodies 20 are different for each row in the axial direction of axis x. Note that the cross-sectional shapes of the plurality of lattice bodies 20 may have the same shape in any one of the plurality of rows in the axial direction of axis x, and may have different shapes for each row in the other rows of the plurality of rows in the axial direction of axis x. The cross-sectional shapes of the plurality of lattice bodies 20 are set according to the shape of the lattice grooves 21. The cross-sectional shapes of all the plurality of lattice bodies 20 may be the same.

[0018] Further, as shown in FIGS. 6 and 7, each of the plurality of lattice bodies 20 has an outer peripheral surface 20a which is a surface facing the outer peripheral side. The outer peripheral surfaces 20a of the plurality of lattice bodies 20 are, for example, curved surfaces, and specifically, for example, extend in a cylindrical surface or a substantially cylindrical surface shape centered on the axis x. Also, as shown in FIGS. 6 and 7, a connecting portion 15 which is a portion protruding in the radial direction is provided on the side surface 11. The connecting portion 15 supports a substrate 9 described later. Further, the connecting portion 15 is formed of a conductor and can be electrically connected to the substrate 9. Note that the connecting portion 15 may be covered with a material having insulating properties (insulating film or coating).

[0019] As shown in FIGS. 6 and 7, as an example, in the cylinder 10, a plurality of lattice bodies 20 are arranged in the circumferential direction to form three circumferential rows. Also, the cross-sectional shapes of the lattice bodies 20 are different for each of the three circumferential rows. That is, as the plurality of lattice bodies 20, the cylinder 10 has a plurality of first lattice bodies 22 which are arranged in the circumferential direction to form one circumferential row, a plurality of second lattice bodies 23 which are arranged in the circumferential direction to form one circumferential row, and a plurality of third lattice bodies 24 which are arranged in the circumferential direction to form one circumferential row. The first lattice body 22 is a lattice body 20 that forms a row on the side of the first end portion 12 of the side surface 11, the second lattice body 23 is a lattice body 20 that forms a row on the side of the second end portion 13 of the side surface 11, and the third lattice body 24 is a lattice body 20 that forms a row between the row of the first lattice body 22 and the row of the second lattice body 23. Also, as shown in FIGS. 6 and 7, the plurality of first lattice bodies 22 and the plurality of second lattice bodies 23 are respectively arranged in the direction of the axis x to form a row in the direction of the axis x. Also, in the circumferential direction, a pair of first lattice 22 and second lattice 23 arranged in the direction of the axis x are positioned between two adjacent third lattices 24.

[0020] As shown in FIGS. 6 and 7, the cross-sectional shape of the first grid body 22 is triangular or substantially triangular, and the first grid body 22 has inner surfaces 22a and 22b and an outer surface 22c, which are three surfaces extending in the radial direction. The inner surfaces 22a and 22b face the second end portion 13 side. The outer surface 22c faces the first end portion 12 side and is connected to the ends of the inner surfaces 22a and 22b on the first end portion 12 side, respectively. The inner surface 22a and the inner surface 22b are connected to each other at the inner ends, and the length between the inner end and the outer end of the inner surface 22a is the same as or substantially the same as the length between the inner end and the outer end of the inner surface 22b. Further, as shown in FIGS. 6 to 8, the first grid body 22 has a first protruding portion 22d protruding in the axial direction of the axis x. The first protruding portion 22d protrudes from the outer surface 22c toward the first end portion 12 side. The first protruding portion 22d protrudes from a portion on the outer peripheral side of the outer surface 22c, for example, as shown in FIG. 8. Note that FIG. 8 is a perspective view showing an enlarged part of the cylinder 10.

[0021] As shown in FIGS. 6 and 7, the cross-sectional shape of the second grid body 23 is a rotationally symmetric or plane-symmetric shape of the cross-sectional shape of the first grid body 22. That is, the cross-sectional shape of the second grid body 23 is triangular or substantially triangular, and the second grid body 23 has inner surfaces 23a and 23b and an outer surface 23c, which are three surfaces extending in the radial direction. The inner surfaces 23a and 23b face the first end portion 12 side. The outer surface 23c faces the second end portion 13 side and is connected to the ends of the inner surfaces 23a and 23b on the second end portion 13 side, respectively. The inner surface 23a and the inner surface 23b are connected to each other at the inner ends, and the length between the inner end and the outer end of the inner surface 23a is the same as or substantially the same as the length between the inner end and the outer end of the inner surface 23b. Further, as shown in FIGS. 6 to 8, the second grid body 23 has a second protruding portion 23d protruding in the axial direction of the axis x. The second protruding portion 23d protrudes from the outer surface 23c toward the second end portion 13 side. The second protruding portion 23d protrudes from a portion on the outer peripheral side of the outer surface 23c, for example, in the same manner as the first protruding portion 22d of the first grid body 22 (see FIG. 8).

[0022] As shown in FIGS. 6 and 7, the cross-sectional shape of the third lattice body 24 is diamond-shaped or substantially diamond-shaped, and the third lattice body 24 has four radially extending surfaces, i.e., outer surfaces 24a, 24b, 24c, and 24d. The outer surfaces 24a and 24b face the first end portion 12 side, and the outer surfaces 24c and 24d face the second end portion 13 side. The outer surface 24a and the outer surface 24b are connected to each other at the ends on the first end portion 12 side, and the outer surface 24c and the outer surface 24d are connected to each other at the ends on the second end portion 13 side. Also, the ends of the outer surface 24a and the outer surface 24b on the second end portion 13 side are respectively connected to the ends of the outer surface 24c and the outer surface 24d on the first end portion 12 side. The length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24a is the same as or substantially the same as the length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24b, and the length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24c is the same as or substantially the same as the length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24d. Also, the length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24a is the same as or substantially the same as the length between the end on the first end portion 12 side and the end on the second end portion 13 side of the outer surface 24c. Also. The angle between the outer surface 24a and the outer surface 24b is the same as or substantially the same as the angle between the outer surface 24c and the outer surface 24d. Also, as shown in FIG. 8, at least one of the third lattice bodies 24 may have a third protrusion 24e protruding radially at one or both of the circumferential ends.

[0023] As shown in FIGS. 6 and 7, in the first lattice body 22 and the second lattice body 23 arranged in the axial direction of the axis x, the inner surfaces 22a and 22b of the first lattice body 22 and the inner surfaces 23a and 23b of the second lattice body 23 face each other in the axial direction of the axis x. Further, in two third lattice bodies 24 adjacent to each other in the circumferential direction, the outer surfaces 24a and 24c of one third lattice body 24 and the outer surfaces 24b and 24d of the other third lattice body 24 face each other in the circumferential direction. Also, the inner surfaces 22a and 22b of the first lattice body 22, the outer surface 24a of one of the two third lattice bodies 24 adjacent to each other in the circumferential direction, and the outer surface 24b of the other third lattice body 24 face each other in the axial direction of the axis x. Further, the inner surfaces 23a and 23b of the second lattice body 23, the outer surface 24c of one of the two third lattice bodies 24 adjacent to each other in the circumferential direction, and the inner surface 24d of the other third lattice body 24 face each other in the axial direction of the axis x. Thus, the plurality of first lattice bodies 22, second lattice bodies 23, and third lattice bodies 24 face each other and form gaps, and the plurality of first lattice bodies 22, second lattice bodies 23, and third lattice bodies 24 as a whole form the lattice groove 21.

[0024] The cylinder 10 is integrally formed from, for example, the same material, and each component of the cylinder 10 is integrally connected. The cylinder 10 is an insulating member and is, for example, a resin member. The cylinder 10 is made of, for example, a resin material, a non-magnetic body, a non-conductive material, etc. Note that the non-magnetic body may have non-conductivity. Note that any one or all of the components of the cylinder 10 may be formed separately. In this case, the components formed separately are assembled by adhesion or the like to form the cylinder 10.

[0025] As described above, the coil 30 is made of a conductive wire 31. The wire 31 is coated with, for example, a material having insulating properties (insulating film or coating). The angle sensor 1 has a plurality of coils 30, and the plurality of coils 30 are connected side by side, for example, in the circumferential direction around the axis x. The plurality of coils 30 form a cylindrical shape (hereinafter referred to as "coil structure") 7 that extends annularly around the axis x. FIG. 9 is a perspective view showing an example of the coil structure 7, and FIG. 10 is a diagram schematically showing the configuration of the coil structure 7 shown in FIG. 9. The coil structure 7 is a shape formed by the arrangement of the plurality of coils 30. In the coil structure 7, the plurality of coils 30 are arranged annularly, for example, so as to be arranged along an annular surface around the axis x. The plurality of coils 30 are arranged annularly, for example, so as to be arranged along a cylindrical surface centered on the axis x. Further, each coil 30 has a shape that surrounds a space, for example. Further, each coil 30 has a shape such that the space surrounded by each coil 30 follows an annular surface around the axis x, for example. Specifically, the coil 30 has an annular shape wound around the circumference in the radial direction of the rotor 2 and surrounds a planar space facing in the radial direction. The plurality of coils 30 are formed side by side around the axis x on the side surface 11 of the cylindrical portion 10 to form the coil structure 7.

[0026] As shown in FIGS. 9 and 10, the coil structure 7 has two pieces (hereinafter referred to as "coil structure pieces") 7a and 7b. The coil structure piece 7a is formed by a plurality of coils 30a, which are the above-described coils 30, connected in series in a plurality of loops. Similarly, the coil structure piece 7b is formed by a plurality of coils 30b, which are the above-described coils 30, connected in series in a plurality of loops. That is, in each of the coil structure piece 7a and the coil structure piece 7b, a plurality of annular coils 30a and 30b are arranged in the circumferential direction. The coil structure piece 7a and the coil structure piece 7b are coated with, for example, a material having insulating properties (insulating film or coating) and are electrically insulated from each other. As shown in FIGS. 9 and 10, the coil structure piece 7a and the coil structure piece 7b overlap in the radial direction to form the coil structure 7. The coil structure piece 7a and the coil structure piece 7b are such that a part of the space surrounded by the coil 30a and a part of the space surrounded by the coil 30b are displaced in the circumferential direction, and another part of the space surrounded by the coil 30a and another part of the space surrounded by the coil 30b overlap in the circumferential direction. Specifically, the space surrounded by the coil 30a is located at a position displaced from the space surrounded by the coil 30b in the circumferential direction by a width equal to half of the width of the space surrounded by the coil 30a. The number of coils 30a and 30b in each of the coil structure pieces 7a and 7b corresponds to the shaft multiple angle set in the angle sensor 1. Also, the number of the coil structure pieces 7a and 7b corresponds to the number of detection signals output by the coil structure 7.

[0027] As described above, the conductor 31 is fitted into the gap between the plurality of lattice bodies 20, that is, the lattice groove 21, to form the coil 30. The conductor 31 for forming the coil 30 is, for example, a magnet wire. FIG. 11 is a diagram showing an example of the coil 30 formed by fitting the conductor 31 into the lattice groove 21. Note that the conductor 31 for forming the coil 30 is not limited to a magnet wire.

[0028] As shown in FIG. 11, in order to form a coil 30 of a desired shape, a conducting wire 31 is fitted into a portion of the lattice groove 21 along the desired shape of the coil 30, thereby forming a coil 30 of the desired shape. Further, by repeatedly fitting the conducting wire 31 in the circumferential direction into the portion of the lattice groove 21 along the desired shape of the coil 30, a plurality of coils 30 of the desired shape that are continuous along the side surface 11 of the cylinder 10 can be formed. Since the plurality of lattice bodies 20 (lattice grooves 21) are along the side surface 11 of the cylinder 10, the plurality of coils 30 are formed side by side around the axis x, and each coil 30 is annular in the circumferential direction. Further, the shape of the space surrounded by each coil 30 becomes a desired shape.

[0029] The coil structure pieces 7a and 7b are each formed, for example, by fitting one magnet wire 31a, 31b into the lattice groove 21 on the side surface 11 of the cylinder 10. Specifically, for example, toward one side in the circumferential direction, for each lattice body group 50 composed of a plurality of lattice bodies 20, the magnet wires 31a, 31b are alternately wound along the contour of the lattice body group 50 from the first end portion 12 side and the second end portion 13 side, and are fitted into the portion of the lattice groove 21 along the contour of the lattice body group 50. When one round of the side surface 11 is completed, it is folded back, and one round is made toward the other side in the circumferential direction. Similarly, the magnet wires 31a, 31b are wound along the contour of the lattice body group 50 and are fitted into the portion of the lattice groove 21 along the contour of the lattice body group 50, and the coil structure pieces 7a, 7b are formed. In this case, each coil 30a, 30b is formed around the lattice body group 50. Further, the coil structure piece 7a and the coil structure piece 7b are shifted from each other by half of the lattice body group 50 in the circumferential direction.

[0030] The lattice body 20 constituting the lattice body group 50 is, for example, as shown in FIGS. 7 and 11, a pair of first lattice bodies 22 and second lattice bodies 23 facing each other in the axial direction x, and a pair of third lattice bodies 24 facing each other in the circumferential direction that sandwich this pair of first lattice bodies 22 and second lattice bodies 23 in the circumferential direction. In the coil 30, as shown in FIGS. 7 and 11, the magnet wire 31 extends along the outer surface 24b of one of the third lattice bodies 24, the outer surface 22c of the first lattice body 22, and the outer surface 24a of the other third lattice body 24. Also, as shown in FIGS. 7 and 11, the magnet wire 31 extends along the outer surface 24c of the other third lattice body 24, the outer surface 23c of the second lattice body 23, and the outer surface 24d of one of the third lattice bodies 24. Further, in the coil 30, as shown in FIGS. 7 and 11, the magnet wire 31 is fitted into the portion of the lattice groove 21 along the outer surface 24b of one of the third lattice bodies 24 and the portion of the lattice groove 21 along the outer surface 24a of the other third lattice body 24. Between them, it is in contact with the outer surface 22c of the first lattice body 22 and is locked to the first protrusion 22d of the first lattice body 22. That is, the first protrusion 22d of the first lattice body 22 supports the magnet wire 31 on the inner peripheral side. Also, in the coil 30, as shown in FIGS. 7 and 11, the magnet wire 31 is fitted into the portion of the lattice groove 21 along the outer surface 24c of the other third lattice body 24 and the portion of the lattice groove 21 along the outer surface 24d of one of the third lattice bodies 24. Between them, it is in contact with the outer surface 23c of the second lattice body 23 and is locked to the second protrusion 23d of the second lattice body 23. That is, the second protrusion 23d of the second lattice body 23 supports the magnet wire 31 on the inner peripheral side.

[0031] As described above, the coil structure piece 7a and the coil structure piece 7b are shifted by half of the lattice body group 50 in the circumferential direction. That is, the lattice group 50 surrounded by the coil 30a of the coil structure piece 7a and the lattice group 50 surrounded by the coil 30b of the coil structure piece 7b partially overlap. Specifically, one of the third lattice bodies 24 of the lattice group 50 surrounded by the coil 30a and the other third lattice body 24 of the lattice group 50 surrounded by the coil 30b are the common third lattice body 24.

[0032] When forming the coil structure pieces 7a and 7b, when folding back the magnet wire 31, the third protrusion 24e (see FIG. 8) formed on the above-described third lattice body 24 can be used. For example, when folding back the magnet wire 31, the magnet wire 31 may be locked to the third protrusion 24e. For example, by winding the magnet wire 31 around the third protrusion 24e, the magnet wire 31 is locked to the third protrusion 24e.

[0033] Both ends of the magnet wire 31 that is fitted into the lattice groove 21 to form a plurality of coils 30 are fixed to the connecting portions 15 formed on the cylinder 10. For example, as shown in FIGS. 6 and 7, four connecting portions 15 are formed on the cylinder 10, and both ends 32a1 and 32a2 of the magnet wire 31a and both ends 32b1 and 32b2 of the magnet wire 31b are respectively fixed to the four connecting portions 15 (see FIG. 11). Further, both ends 32a1 and 32a2 of the magnet wire 31a and both ends 32b1 and 32b2 of the magnet wire 31b are respectively electrically connected to the four connecting portions 15. As described above, the connecting portion 15 is electrically connected to a substrate 9 to be described later, and both ends 32a1 and 32a2 of the magnet wire 31a and both ends 32b1 and 32b2 of the magnet wire 31b can be electrically connected to the substrate 9 via the connecting portion 15.

[0034] Note that each coil 30 (30a, 30b) is not limited to being formed around the lattice body group 50 having the above-described configuration. The lattice body group 50 is not limited to the above-described configuration, and can have various configurations according to the desired shape of the coil 30. Further, although the case where the magnet wire 31 (31a, 31b) makes one turn has been described, the winding form of the magnet wire 31 is not limited to this, and it may be wound two or more times. In other words, the coil 30 formed by winding the magnet wire 31 may have a plurality of layers such as 2 layers, 3 layers, 4 layers, 5 layers, etc. in addition to one layer in the radial direction or the axial direction. When the number of turns or the number of layers is large, the output signal or the signal to be detected (for example, the amplitude of the waveform of the signal) can be amplified.

[0035] Next, the frame 6 that supports the cylinder 10 will be described. As described above, the frame 6 has a first frame 60 and a second frame 70. FIGS. 12 and 13 are a perspective view and a rear view schematically showing the configuration of the first frame 60, respectively, and FIGS. 14 and 15 are a perspective view and a front view schematically showing the configuration of the second frame 70, respectively. Note that FIG. 12 shows the first frame 60 as viewed from the rear side, and FIG. 14 shows the second frame 70 as viewed from the front side. As shown in FIGS. 4 and 5, the first frame 60 and the second frame 70 are configured to sandwich and fix the cylinder 10 therebetween. Note that the first frame 60 and the second frame 70 may be configured to removably and fixably hold the cylinder 10.

[0036] As shown in FIGS. 12 and 13, the first frame 60 has a cover 61 that partially covers a plurality of outer coils 30 attached to the cylinder 10. The cover 61 is, for example, a cylindrical portion corresponding to the cylinder 10. Further, the cover 61 is formed, for example, so that the cylinder 10 is fixed. The cover 61 forms a space capable of accommodating a portion having a predetermined width in the axial direction x from the first end 12 of the cylinder 10, and has an inner peripheral surface 62 that defines this space. This predetermined width is, for example, half or approximately half of the width of the cylinder 10 in the axial direction x. Further, the cover 61 has an outer peripheral surface 63 that faces the outer peripheral side on the inner peripheral surface 62. The inner peripheral surface 62 is a cylindrical surface extending along the axis x, and the inner peripheral surface 62 extends, for example, on a cylindrical surface having the axis x as the central axis. Specifically, the inner peripheral surface 62 of the cover 61 is formed so as to be able to accommodate a plurality of lattice bodies 20 on the side surface 11 of the cylinder 10, and when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 62, it is arranged to face the outer peripheral surface 20a of the plurality of lattice bodies 20 in the radial direction. The inner peripheral surface 62 of the cover 61 has, for example, an inner diameter such that when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 62, it contacts the outer peripheral surface 20a of the plurality of lattice bodies 20 and the cylinder 10 is press-fitted into the space formed by the inner peripheral surface 62. In this way, the cylinder 10 is press-fitted and fixed to the cover 61 and is fixed to the first frame 60. Note that the inner peripheral surface 62 of the cover 61 may have a size (inner diameter) such that when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 62, an annular gap is formed between the inner peripheral surface 62 and the outer peripheral surface 20a of the plurality of lattice bodies 20 without contacting the outer peripheral surface 20a of the plurality of lattice bodies 20. In this case, the cylinder 10 is fixed to the first frame 60 by, for example, adhesion using an adhesive. Further, as shown in FIGS. 11 and 12, an annular flange 61a protruding inward is provided at the front end of the inner peripheral surface 62 in the axial direction x. When the cylinder 10 is accommodated in the space formed by the inner peripheral surface 62, the first end 12 of the cylinder 10 may contact the flange 61a of the cover 61.

[0037] Also, as shown in FIGS. 12 and 13, the first frame 60 has an attachment portion 64 which is a portion to be attached to an external device as an application target. The attachment portion 64 is provided, for example, on the outer peripheral surface 63 of the cover 61 and protrudes outward from the cover 61. The attachment portion 64 is provided, for example, at the rear end of the cover 61 in the axial direction of the axis x. Further, the attachment portion 64 has, for example, a hole portion (hereinafter referred to as a "through hole") 64a through which a fixing member such as a bolt passes, and the attachment portion 64 can be attached to an external device by the fixing member. The first frame 60 has, for example, three attachment portions 64. Note that the number of attachment portions 64 provided on the first frame 60 is not limited to this. This through hole 64 may be provided with a metal collar (not shown).

[0038] Also, as shown in FIGS. 5, 12, and 13, the cover 61 has, for example, an opening portion 65 that forms an opening penetrating a part of the cover 61 in the radial direction. The opening portion 65 is an opening for taking out the end portion 32 of the magnet wire 31 that forms a plurality of coils 30 provided on the cylinder 10 fixed to the frame 6 to the outside of the cover 61, as will be described later.

[0039] Further, as shown in FIGS. 12 and 13, the first frame 60 has a connecting portion 66 which is a radially protruding portion. The connecting portion 66 supports a substrate 9 described later. Further, the connecting portion 66 is formed of a conductor and can be electrically connected to the substrate 9. Note that the connecting portion 66 may be covered with a material having insulating properties (insulating film or coating). The connecting portion 66 is provided on the cover 61, for example, as shown in FIGS. 12 and 13, and is provided at a position adjacent in the axial direction x of the opening 65. The connecting portion 66 is a member for electrically connecting both ends of the exciting circuit 8 to the substrate 9, and two connecting portions 66 are provided on the first frame 60. Further, as shown in FIGS. 4 and 5, an annular groove 67 recessed inward is formed on the outer peripheral surface 63 of the cover 61, and an exciting circuit 8a, which is one of the exciting circuits 8, is accommodated in the groove 67. The exciting circuit 8a is formed by winding a conducting wire around the groove 67, and ends 8a1 and 8a2 of the exciting circuit 8a, which are both ends of this conducting wire, are fixed to the connecting portion 66 as shown in FIG. 4, respectively. The ends 8a1 and 8a2 of the exciting circuit 8a are electrically connected to the connecting portion 66, respectively. Further, a recess 68 is formed in the first frame 60 at a position adjacent to the connecting portion 66 in the axial direction x to form a gap between two adjacent mounting portions 64. The recess 68 forms a space for the substrate 9 described later to extend in the axial direction x.

[0040] The second frame body 70 has, for example, the same configuration as the above-described first frame body 60. As shown in FIGS. 14 and 15, the second frame 70 has a cover 71 that partially covers a plurality of outer coils 30 attached to the cylinder 10. The cover 71 is, for example, a cylindrical portion corresponding to the cylinder 10. Further, the cover 71 is formed, for example, so that the cylinder 10 is fixed. The cover 71 forms, for example, a space capable of accommodating a portion of a predetermined width in the axial direction x from the second end portion 13 of the cylinder 10, and has an inner peripheral surface 72 that defines this space. This predetermined width is, for example, half or approximately half of the width of the cylinder 10 in the axial direction x. Further, the cover 71 has an outer peripheral surface 73 that faces the outer peripheral side on the inner peripheral surface 72. The inner peripheral surface 72 is a cylindrical surface extending along the axis x, and the inner peripheral surface 72 extends, for example, on a cylindrical surface centered on the axis x. Specifically, the inner peripheral surface 72 of the cover 71 is formed so as to be able to accommodate a plurality of lattice bodies 20 on the side surface 11 of the cylinder 10, and when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 72, it is arranged to face the outer peripheral surface 20a of the plurality of lattice bodies 20 in the radial direction. The inner peripheral surface 72 of the cover 71 has, for example, an inner diameter such that when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 72, it contacts the outer peripheral surface 20a of the plurality of lattice bodies 20 and the cylinder 10 is press-fitted into the space formed by the inner peripheral surface 72. In this way, the cylinder 10 is press-fitted and fixed to the cover 71 and is fixed to the second frame 70. Note that the inner peripheral surface 72 of the cover 71 may have a size (inner diameter) such that when the cylinder 10 is accommodated in the space formed by the inner peripheral surface 72, an annular gap is formed between the inner peripheral surface 72 and the outer peripheral surface 20a of the plurality of lattice bodies 20 without contacting the outer peripheral surface 20a of the plurality of lattice bodies 20. In this case, the cylinder 10 is fixed to the second frame 70 by, for example, adhesion using an adhesive. Further, as shown in FIGS. 14 and 15, an annular flange 71a protruding inward is provided at the front end of the inner peripheral surface 72 in the axial direction x. When the cylinder 10 is accommodated in the space formed by the inner peripheral surface 72, the second end portion 13 of the cylinder 10 may contact the flange 71a of the cover 71.

[0041] Further, as shown in FIGS. 14 and 15, the second frame 70 has an attachment portion 74 which is a portion to be attached to an external device as an application target. The attachment portion 74 is provided, for example, on the outer peripheral surface 73 of the cover 71 and protrudes outward from the cover 71. The attachment portion 74 is provided, for example, at the rear end of the cover 71 in the axial direction x. Further, the attachment portion 74 has, for example, a hole portion (hereinafter referred to as a "through hole") 74a through which a fixing member such as a bolt passes, and the attachment portion 74 can be attached to an external device by the fixing member. This through hole 64 may be provided with a metal collar (not shown). The first frame 70 has, for example, three attachment portions 74. Note that the number of attachment portions 74 of the second frame 70 is not limited to this. For example, as shown in FIGS. 4 and 5, the attachment portion 74 of the second frame 70 is configured to be in contact with the attachment portion 64 of the first frame 60 in the axial direction x.

[0042] Also, as shown in FIGS. 14 and 15, the second frame 70 has a connecting portion 75 which is a radially protruding portion. The connecting portion 75 supports a substrate 9 described later. Further, the connecting portion 75 is formed of a conductor and is electrically connectable to the substrate 9. Note that the connecting portion 75 may be covered with an insulating material (insulating film or coating). The connecting portion 75 is provided on the cover 71, for example, as shown in FIGS. 14 and 15. The connecting portion 75 is a member for electrically connecting both ends of the exciting circuit 8 to the substrate 9, and two connecting portions 75 are provided on the second frame 70. Note that the number of the connecting portions 75 provided on the second frame 70 is not limited to this, and the number of the connecting portions 75 may be one or three or more. Also, as shown in FIGS. 4 and 14, an annular groove 76 recessed inward is formed in the outer peripheral surface 73 of the cover 71, and an exciting circuit 8b, which is one of the exciting circuits 8, is accommodated in the groove 76. The exciting circuit 8b is formed by winding a conducting wire in the groove 76, and ends 8b1 and 8b2 of the exciting circuit 8b, which are both ends of this conducting wire, are fixed to the connecting portions 75, respectively (see FIG. 4). The ends 8b1 and 8b2 of the exciting circuit 8b are electrically connected to the connecting portions 75, respectively. Further, a recess 77 is formed in the second frame 70 at a position adjacent to the connecting portion 75 in the axial direction of the axis x to form a gap between two adjacent mounting portions 74. The recess 77 forms a space for the substrate 9 described later to extend in the axial direction of the axis x. The size of the gap formed by the recess 77 is the same as or substantially the same as the size of the gap formed by the recess 68 of the first frame 60.

[0043] As shown in FIGS. 5, 14, and 15, unlike the cover 61 of the first frame 60, the cover 71 of the second frame 70 is not provided with an opening that penetrates the cover 71. However, an opening may be provided in the cover 71 of the second frame 70 to form an opening that penetrates the cover 71, similar to the opening 65 of the cover 61 of the first frame 60. In this case, the opening is provided, for example, at a position adjacent to the connecting portion 75 in the axial direction of the axis x. Further, when an opening is provided in the second frame 70, the opening 65 may not be provided in the cover 61 of the first frame 60. The opening provided in the cover 71 of the second frame 70 is also an opening for bringing out the end portion 32 of the magnet wire 31 that forms the plurality of coils 30 to the outside of the cover 71, similar to the opening 65 of the first frame 60.

[0044] The first frame 60 and the second frame 70 are each integrally formed, for example, from the same material. The first frame 60 and the second frame 70 are insulating members, for example, members made of resin. The first frame 60 and the second frame 70 are made of, for example, resin material, non-magnetic material, non-conductive material, etc. Note that the non-magnetic material may have non-conductivity. The materials of the first frame 60 and the second frame 70 may be the same as the material of the cylinder 10. Note that any one or all of the configurations of the first frame 60 and the second frame 70 may be formed separately. In this case, the separately formed configurations are assembled by adhesion or the like to form the first frame 60 and the second frame 70, respectively.

[0045] FIG. 16 is a cross-sectional view showing the stator 3 in an assembled state in which the cylinder 10 is fixed to the frame 6 (the first frame 60 and the second frame 70), and the cylinder 10 and the frame 6 are assembled. FIG. 16 shows a cross-section by a plane including the axis x of the cylinder 10 and the frame 6 in the assembled state. As shown in FIG. 16, in the assembled stator 3, the portion on the first end portion 12 side of the cylinder 10 is accommodated in the space formed by the inner peripheral surface 62 of the cover 61 of the first frame 60, and the portion on the second end portion 13 side of the cylinder 10 is accommodated in the space formed by the inner peripheral surface 72 of the cover 71 of the second frame 70, and the cylinder 10 is fixed to the frame 6. Further, in the assembled stator 3, the mounting portion 64 of the first frame 60 and the mounting portion 74 of the second frame 70 are in contact with and connected to each other in the axial direction of the axis x, and the covers 61 and 71 are also in contact with and connected to each other in the axial direction of the axis x. Further, the recess 68 of the first frame 60 and the recess 77 of the second frame 70 overlap in the axial direction of the axis x. As described above, the fixing of the cylinder 10 to the frame 6 is performed, for example, by engagement, fitting, or joining. Further, the fixing of the cylinder 10 to the frame 6 may be performed, for example, by adhesion. Note that the fixing configuration of the cylinder 10 to the frame 6 is not limited to these configurations.

[0046] As shown in FIG. 16, in the assembled stator 3, in the axial direction of the axis x, the entire cylinder 10 is covered by the cover 61 and the cover 71. That is, the width in the axial direction of the axis x of the inner peripheral surface 62 of the connected cover 61 and the inner peripheral surface 72 of the cover 71 is the same as or larger than the width in the axial direction of the axis x of the cylinder 10. However, in the assembled stator 3, in the axial direction of the axis x, the entire cylinder 10 may not be covered by the cover 61 and the cover 71. That is, the width in the axial direction of the axis x of the inner peripheral surface 62 of the connected cover 61 and the inner peripheral surface 72 of the cover 71 may be smaller than the width in the axial direction of the axis x of the cylinder 10. In this case, at least one of the covers 61 and 71 is not provided with the flanges 61a and 71a. Also, in the assembled stator 3, the cover 61 and the cover 71 may not be connected in the axial direction of the axis x and may face each other with a gap therebetween. Thus, in the assembled stator 3, the plurality of coils 30 formed on the side surface 11 of the cylinder 10 are covered by the frame 6. For this reason, the coil structure 7 can be protected without protecting the coil structure 7 by potting or the like, and it is possible to suppress the contact of objects or the like with the coil structure 7.

[0047] Also, as shown in FIG. 16, in the assembled stator 3, in the axial direction of the axis x, the first end portion 12 of the cylinder 10 is in contact with the flange 61a of the cover 61 of the first frame 60. Similarly, the second end portion 13 of the cylinder 10 is in contact with the flange 71a of the cover 71 of the second frame 70. Note that the first end portion 12 of the cylinder 10 may not be in contact with the flange 61a. Also, the second end portion 13 of the cylinder 10 may not be in contact with the flange 71a of the cover 71 of the second frame 70.

[0048] Also, as shown in FIGS. 2 to 5, the angle sensor 1 has a substrate 9, and the substrate 9 is attached to the stator 3. The substrate 9 is an electric circuit device having a circuit section and a calculation section. The substrate 9 is, for example, a printed circuit board (PCB), and has electronic components, wirings, and lands as terminals. As shown in FIGS. 2 to 5, the substrate 9 has, for example, a connecting portion 15 that protrudes to the outer peripheral side through an opening 65 of a first frame 60 of the stator 3, and is supported by a connecting portion 66 of the first frame 60. The connecting portions 15 and 66 respectively support the substrate 9, for example, by passing through the substrate 9 or having their tips buried in the substrate 9. Note that the supporting form of the substrate 9 by the connecting portions 15 and 66 is not limited to this. For example, a supporting form such as adhesion can be applied. Also, for example, the substrate 9 can be supported by a connector (not shown) or by a fixing portion (not shown) of the first frame 60. Further, the substrate 9 passes through, for example, a gap formed by a recess 68 of the first frame 60 and a recess 77 of the second frame 70.

[0049] Also, each of the four connecting portions 15 is electrically connected to a corresponding land, for example. Thereby, an end portion 32 of a magnet wire 31 drawn from the coil 30 is electrically connected to the land of the substrate 9, and the magnet wire 31 (coil 30) and each component of the substrate 9 are electrically connected. Similarly, each of the two connecting portions 66 is electrically connected to a corresponding land. Thereby, end portions 8a1 and 8a2 of a conducting wire drawn from the exciting circuit 8a are electrically connected to the land of the substrate 9, and the exciting circuit 8a and each component of the substrate 9 are electrically connected. Note that the connecting portions 15 and 66 and the lands of the substrate 9 may be electrically connected via other conductive members instead of being directly electrically connected.

[0050] Note that the substrate 9 may be supported by a connecting portion 75 of the second frame 70 in the same manner instead of the connecting portion 66 of the first frame 60. Further, the substrate 9 may be supported by the connecting portion 75 in addition to the connecting portions 15 and 66.

[0051] As shown in FIGS. 1 to 4, in the angle sensor 1, the rotor 2 is accommodated in the space surrounded by the inner peripheral surface 14 of the cylinder 10 of the stator 3. The outer peripheral surface 42 of the rotor 2 faces the inner peripheral surface 14 of the cylinder 10 of the stator 3 in the radial direction with an annular space therebetween, and the plurality of metal bodies 5 of the rotor 2 face the plurality of coils 30 fitted in the lattice grooves 21 formed by the plurality of lattice bodies 20 of the cylinder 10 of the stator 3 in the radial direction. In this way, the rotor 2 and the stator 3 form an inductive angle sensor, and the plurality of coils 30 form detection coils. Also, a magnetic space or a magnetic gap is formed between the rotor 2 and the stator 3.

[0052] In the angle sensor 1, a radially directed magnetic flux whose magnitude changes periodically acts on the plurality of coils 30. Specifically, as described above, the frame 6 of the stator 3 is provided with the excitation circuits 8 (8a, 8b) (see FIG. 4), and the excitation circuit 8 forms a magnetic circuit that generates a periodically changing magnetic flux acting on the plurality of coils 30. On the other hand, the plurality of metal bodies 5 are arranged in the circumferential direction around the axis x as described above, and cross the magnetic flux generated by the excitation circuit 8 as the rotor 2 rotates. Also, the projection of the metal body 5 having a portion extending along the axis x onto the coil 30 in the radial direction moves as the rotor 2 rotates. For this reason, the magnetic flux from the excitation circuit 8 acting on each of the plurality of coils 30 changes periodically as the rotor 2 rotates by canceling each other out under the influence of the eddy current generated in the metal body 5. As a result, in the plurality of coils 30, an electromotive force that changes as the rotor 2 rotates is generated by electromagnetic induction, and a signal that changes as the rotor 2 rotates is detected from the plurality of coils 30. Based on the detection signals from the plurality of coils 30, the rotation angle of the rotor 2 is detected in an external electric circuit device.

[0053] The angle sensor 1 according to this embodiment has the above-described configuration. The conductive wire 31 is fitted into the grid groove 21 formed by the plurality of grid bodies 20, and a plurality of coils 30 having a desired shape corresponding to the contour of the grid body group 50 along which the conductive wire 31 extends are formed. Thus, in the angle sensor 1, the plurality of coils 30 can be accurately formed into a desired shape, and it is possible to suppress the shapes of the plurality of coils 30 from becoming different from the desired shape. For this reason, it is possible to suppress variations in the detection signals output from the plurality of coils 30. Thereby, the detection accuracy of the angle sensor 1 can be improved. Thereby, in the electronic components on the substrate 9, it is possible to suppress fluctuations in the correction value of the detection signal.

[0054] Further, according to the angle sensor 1, coils 30 having a desired shape can be easily formed, and the productivity of the plurality of coils 30 can be improved. Further, by arbitrarily selecting the grid bodies 20 constituting the grid body group 50 from the plurality of grid bodies 20, it is possible to increase the variations in the contour shape of the grid body group 50. Thereby, coils 30 of various shapes can be easily produced. Further, by including the plurality of grid bodies 20 having a plurality of shapes, it is possible to further increase the variations in the contour shape of the grid body group 50.

[0055] As described above, according to the angle sensor 1 according to the embodiment of the present invention, the detection accuracy can be improved.

[0056] Note that the frame 6 may have either the first frame 60 or the second frame 70. In this case, the cylinder 10 is accommodated in the inner peripheral surface 62 of the cover 61 of the first frame 60 or the inner peripheral surface 72 of the cover 71 of the second frame 70 in the same manner as in the above-described case. Further, the angle sensor 1 may have either the excitation circuit 8a or the excitation circuit 8b as the excitation circuit 8.

[0057] The present invention has been described through the above embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that forms with such changes or improvements can also be included in the technical scope of the present invention.

[0058] The embodiments described above are for facilitating the understanding of the present invention and are not for limiting and interpreting the present invention. Also, the above embodiments do not limit the objects to which the present invention is applied, and the present invention can include any object as its application target. Each component included in the above embodiments, as well as its arrangement, material, conditions, shape, size, etc. are not necessarily limited to those illustrated and can be changed as appropriate. For example, the present invention includes differences that occur in the implementation such as manufacturing tolerances. Also, within a technically non - contradictory range, components shown in different embodiments can be partially replaced or combined with each other. Further, each configuration can be selectively combined as appropriate so as to achieve at least part of the above - described problems and effects.

Explanation of Reference Numerals

[0059] 1 Angle sensor, 2 Rotor (rotating body), 3 Stator, 4 Conductor structure, 5 Metal body (conductor), 6 Frame, 7 Coil structure, 7a, 7b Coil structure pieces, 8, 8a, 8b Excitation circuits, 8a1, 8a2, 8b1, 8b2 Ends, 9 Substrate, 10 Cylinder, 11 Side surface, 12 First end, 13 Second end, 14 Inner peripheral surface, 15 Connecting portion, 20 Lattice body, 20a Outer peripheral surface, 21 Lattice groove, 21a First direction groove, 21b Second direction groove, 22 First lattice body, 22a, 22b Inner surfaces, 22c Outer surface, 22d First protrusion, 23 Second lattice body, 23a, 23b Inner surfaces, 23c Outer surface, 23d Second protrusion, 24 Third lattice body, 24a, 24b, 24c, 24d Outer surfaces, 24e Third protrusion, 30, 30a, 30b Coils, 31, 31a, 31b Conductive wires, 32, 32a1, 32a2, 32, 32b1, 32b2 Ends, 40 Cylinder, 41 Inner peripheral surface, 42 Outer peripheral surface, 43, 44 End faces, 50 Lattice body group, 60 First frame, 61 Cover, 61a Flange, 62 Inner peripheral surface, 63 Outer peripheral surface, 64 Mounting portion, 65 Opening, 66 Connecting portion, 67 Groove, 68 Recess, 70 Second frame, 71 Cover, 71a Flange, 72 Inner peripheral surface, 73 Outer peripheral surface, 74 Mounting portion, 75 Connecting portion, 76 Groove, 77 Recess, x Axis

Claims

1. a cylinder having a side surface extending in the circumferential direction, a coil fixed to the side surface, comprising, on the side surface of the cylinder, a plurality of lattice bodies arranged in the circumferential direction and the axial direction are provided, a conducting wire forming the coil is fitted into a gap between the plurality of lattice bodies, an angle sensor.

2. the side surface extends in the axial direction, the angle sensor according to Claim 1.

3. the side surface includes a first end portion and a second end portion in the axial direction, among the plurality of lattice bodies, a first lattice body on the first end side of the side surface is included, the first lattice body includes a first protruding portion protruding in the axial direction, the angle sensor according to Claim 1 or 2.

4. the first protruding portion supports the conducting wire, the angle sensor according to Claim 3.

5. among the plurality of lattice bodies, a second lattice body on the second end side of the side surface is included, the second lattice body includes a second protruding portion protruding in the axial direction, the angle sensor according to Claim 4.

6. the second protruding portion supports the conducting wire, the angle sensor according to Claim 5.

7. comprising a substrate provided on the side surface, on the side surface, a connecting portion protruding in the radial direction is provided, the connecting portion supports the substrate, the angle sensor according to any one of Claims 1 to 6.

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