Rotary connector device

Abstract

To provide a rotary connector device capable of suppressing floating of a flat cable while achieving compactification.SOLUTION: A rotary connector device comprises a plurality of flat cables having an inversion part that is housed in a state of being laminated to a housing space between a rotator and a stator, that is wound in one direction to a cylinder part of the rotator and is wound in the other direction to an outer wall part of a stator, and in which a rotational direction that it is wound in one direction and a rotational direction that it is wound in the other direction are inverted. The flat cable laminated at a position most separated from the cylinder part and the outer wall part from the plurality of laminated flat cables is a high-rigidity flat cable of which a curvature rigidity is higher than the other flat cables.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a rotary connector device. [Background technology]

[0002] Conventionally, steering wheels mounted on automobiles are required to rotate about 2.5 times in both the clockwise and counterclockwise directions from a neutral position. Accordingly, a rotary connector device connecting the steering wheel and the vehicle is also required to rotate about 2.5 times in both the clockwise and counterclockwise directions from a neutral position.

[0003] Meanwhile, steer-by-wire, a system that controls the tire angle by an electric signal without mechanically connecting the steering wheel and the tires, has been attracting attention in recent years. In steer-by-wire, the number of rotations required for the steering wheel is about 0.5 to 0.8 rotations clockwise and counterclockwise from the neutral position. Therefore, unlike rotary connector devices used in systems that mechanically connect the steering wheel and the tires, a rotary connector device that can handle the reduced number of steering rotations in steer-by-wire is required.

[0004] For example, Patent Document 1 describes a relay device including a first flat cable, a second flat cable, a moving member, a first contact member, and a second contact member, which are arranged in a space formed between a fixed member and a rotating member. In the relay device of Patent Document 1, the first flat cable is wound from the inner circumference of the forward space to the outer circumference of the reverse space at a first reversal portion where the winding direction is reversed, and the second flat cable is wound from the inner circumference of the reverse space to the outer circumference of the forward space at a second reversal portion where the winding direction is reversed. In addition, the moving member moves in the space according to the rotation of the rotating member. The first contact member is arranged on the moving member, and when the rotating member rotates in the reverse direction, the first flat cable is wound around the inner circumference, causing contact with the first reversal portion, causing the moving member to move in the reverse direction. In addition, the second contact member is disposed on the moving member, and when the rotating member rotates in the forward direction, the second contact member moves the moving member in the forward direction due to contact of the second inverted portion caused by the second flat cable being wound around the inner circumference.

[0005] However, in the above-mentioned conventional technologies including Patent Document 1, the width of the annular accommodation space for accommodating the flat cable inside the housing of the rotary connector device is uniform or approximately uniform around the entire circumference to the extent that the flat cable can rotate around the entire circumference. Therefore, a certain outer diameter space is required for the rotation axis of the rotor that constitutes the rotary connector device, and the design freedom of the rotary connector device is low. In addition, when the design of the configuration related to the accommodation space is changed, it is also necessary to consider a mechanism that prevents the part of the flat cable that is wound around the rotor from floating up from the rotor (hereinafter, also referred to as floating of the flat cable). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2021-190324 A Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present disclosure is to provide a rotary connector device that can be made compact and that can suppress floating of a flat cable. [Means for solving the problem]

[0008] [1] A rotary connector device comprising: a rotating body having a cylindrical portion and being rotatable; a fixed body having an outer wall portion and a narrowing outer wall portion arranged opposite to the outer surface of the cylindrical portion, the opposing distance between the cylindrical portion and the narrowing outer wall portion being shorter than the opposing distance between the cylindrical portion and the outer wall portion; and a plurality of flat cables that are stored in a stacked state in a storage space between the rotating body and the fixed body, wound in one direction about the cylindrical portion of the rotating body and wound in the other direction about the outer wall portion of the fixed body, and have an inversion portion where the rotation direction of the winding in one direction and the rotation direction of the winding in the other direction are reversed, wherein of the plurality of stacked flat cables, the flat cable stacked at a position farthest from the cylindrical portion and the outer wall portion is a high-rigidity flat cable having a higher bending rigidity than the other flat cables. [2] The rotary connector device according to [1], wherein the high-rigidity flat cable has a rigidity adding portion that adds rigidity. [3] The rotary connector device according to [2], wherein the stiffness-adding portion is a plate-like member that can be attached to the outer surface of the flat cable. [4] The rotary connector device according to [2], wherein the rigidity adding portion is covered with an insulator. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a rotary connector device that can be made compact and that can suppress floating of a flat cable. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a partially see-through plan view showing an example of a rotary connector device according to a first embodiment. [Diagram 2]FIG. 2 is a partially see-through plan view showing the state of the rotary connector device of FIG. 1 when the steering wheel is rotated 250 degrees counterclockwise. [Diagram 3] FIG. 3 is a partially see-through plan view showing the state of the rotary connector device of FIG. 1 when the steering wheel is rotated 250 degrees clockwise. [Figure 4] FIG. 4 is a partially see-through plan view showing an example of a rotary connector device according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a detailed description will be given based on an embodiment.

[0012] As a result of extensive research, the inventors have discovered that by making part of the storage space that houses the flat cable a narrow space and providing a moving holding portion of the cable holding body at a predetermined position relative to the flat cable, the rotating connector device can be made compact and the floating of the flat cable within the rotating connector device can be suppressed, and the present disclosure has been completed based on this knowledge.

[0013] The rotary connector device of one embodiment comprises a rotor having a cylindrical portion and being rotatable; a fixed body having an outer wall portion and a narrowing outer wall portion arranged opposite the outer surface of the cylindrical portion, the opposing distance between the cylindrical portion and the narrowing outer wall portion being shorter than the opposing distance between the cylindrical portion and the outer wall portion; and a plurality of flat cables that are stored in a stacked state in the storage space between the rotors and the fixed body, wound in one direction about the cylindrical portion of the rotor and wound in the other direction about the outer wall portion of the fixed body, and have an inversion portion in which the rotation direction of the winding in one direction and the rotation direction of the winding in the other direction are reversed. Of the plurality of stacked flat cables, the flat cable stacked at a position farthest from the cylindrical portion and the outer wall portion is a high-rigidity flat cable having a higher bending rigidity than the other flat cables.

[0014] (First embodiment) Fig. 1 is a partially see-through plan view showing an example of a rotary connector device according to a first embodiment. Fig. 2 is a partially see-through plan view showing a state of the rotary connector device of Fig. 1 when a steering wheel (not shown) is rotated 250 degrees counterclockwise. Fig. 3 is a partially see-through plan view showing a state of the rotary connector device of Fig. 3 when the steering wheel is rotated 250 degrees clockwise.

[0015] For convenience, Figures 1 to 3 and the subsequent figures show a transparent state of the top plate which is connected vertically to the cylindrical portion 21 of the rotating body 2 and the outer wall portion 31 and narrowed outer wall portion 32 of the fixed body 3, respectively, and which forms the storage space S together with the rotating body 2 and the fixed body 3.

[0016] As shown in Fig. 1, the rotary connector device 1 of the first embodiment includes a rotating body 2, a fixed body 3, and a plurality of flat cables 4a, 4b, 4c, 4d, 4e, and 4f (hereinafter referred to as 4a to 4f). The rotary connector device 1 is mounted on an automobile and electrically connects an electronic device (not shown) provided on the rotating body 2 side to an electronic device (not shown) provided on the fixed body 3 side. The rotating body 2 rotates in response to the rotation of a steering wheel (not shown), and the fixed body 3 does not rotate in response to the rotation of the steering wheel. The steering wheel is mounted rotatably relative to the vehicle (not shown).

[0017] The rotating body 2 constituting the rotary connector device 1 has a cylindrical portion 21, and is rotatably attached inside the fixed body 3. The cylindrical portion 21 forms the inner side wall of the rotary connector device 1.

[0018] A steering shaft (not shown) connected to a steering wheel (not shown) is inserted inside the cylindrical portion 21. The steering shaft rotates about a rotation axis O in response to the rotation of the steering wheel, and the rotating body 2 rotates about the rotation axis O relative to the fixed body 3 in response to the rotation of the steering shaft. The rotating body 2 rotates less than one rotation each in the clockwise and counterclockwise directions from the neutral position, and preferably rotates about 0.5 to 0.8 rotations. Even if the steering shaft rotates, the fixed body 3 does not rotate.

[0019] The fixed body 3 has an outer wall portion 31 and a narrowed outer wall portion 32. Each of the outer wall portion 31 and the narrowed outer wall portion 32 extends in the circumferential direction of the cylindrical portion 21 of the rotating body 2 and is disposed opposite to the outer surface of the cylindrical portion 21. The outer wall portion 31 and the narrowed outer wall portion 32 form outer side walls of the rotary connector device 1.

[0020] As shown in FIG. 1, the facing distance L2 between the outer surface of the cylindrical portion 21 and the inner surface of the narrowed outer wall portion 32 (hereinafter also referred to as the second facing distance L2) is shorter than the facing distance L1 between the outer surface of the cylindrical portion 21 and the inner surface of the outer wall portion 31 (hereinafter also referred to as the first facing distance L1). In the storage space S, the region where the outer surface of the cylindrical portion 21 and the inner surface of the outer wall portion 31 face each other is a non-annular moving space S1, and the region where the outer surface of the cylindrical portion 21 and the inner surface of the narrowed outer wall portion 32 face each other is a non-annular narrowed space S2. For example, as shown in FIG. 1, the moving space S1 is arc-shaped, and the narrowed space S2 is arc-shaped. Since the second facing distance L2 is shorter than the first facing distance L1, the radial length of the narrowed space S2 is shorter than the radial length of the moving space S1 about the central axis O, that is, the width of the narrowed space S2 is smaller than the width of the moving space S1.

[0021] Here, an example is shown in which the outer wall portion 31 and the narrowing outer wall portion 32 are connected via two flat plate-shaped connecting portions 33, but the connecting state between the outer wall portion 31 and the narrowing outer wall portion 32 is not particularly limited. For example, the connecting portion 33 may be a curved plate, or the outer wall portion 31 and the narrowing outer wall portion 32 may be directly connected without the connecting portion 33.

[0022] In addition, in the conventional rotary connector device, since the rotor rotates at least one revolution each in the clockwise and counterclockwise directions, the width of the annular storage space needs to be uniform or approximately uniform over the entire circumference so that components such as the inverted parts of each of the flat cables 4a to 4f, which will be described later, can move over the entire circumference of the storage space. On the other hand, in the rotary connector device 1, the rotor 2 rotates less than one revolution each in the clockwise and counterclockwise directions, i.e., does not rotate at least one revolution, so that components such as the inverted parts of each of the flat cables 4a to 4f do not move over the entire circumference of the storage space S but move in a part of the storage space S, i.e., the movement space S1. In the region in the storage space S where components such as the inverted parts of each of the flat cables 4a to 4f do not move, a width equivalent to the movement space S1 is not required, so the fixed body 3 can have a narrow outer wall portion 32 for forming a narrow space S2 narrower than the movement space S1. As a result, the rotary connector device 1 can be made more compact than the conventional rotary connector device. When a conventional rotary connector device is mounted on an automobile, a certain amount of space is required around the center of rotation of the rotor, but the rotary connector device 1 can be mounted even if there is no space in a certain direction, for example, above, around the center of rotation. In this way, the degree of freedom in designing the rotary connector device 1 is improved.

[0023] As shown in Fig. 1, a plurality of flat cables 4a to 4f are accommodated in the accommodation space S between the rotating body 2 and the fixed body 3. Each of the plurality of flat cables 4a to 4f has a conductor for transmitting power or an electric signal, and an insulator covering the conductor. Here, six flat cables 4a to 4f are accommodated, but the number of flat cables is not particularly limited as long as it is two or more.

[0024] The multiple flat cables 4a-4f are wound in one direction around the outer surface of the cylindrical portion 21 and in the other direction around the inner surface of the outer wall portion 31, in a stacked state. Here, as shown in Fig. 1, the multiple flat cables 4a-4f are wound clockwise around the outer surface of the cylindrical portion 21 and counterclockwise around the inner surface of the outer wall portion 31. In addition, the multiple flat cables 4a-4f are not wound around the inner surface of the narrowed outer wall portion 32.

[0025] The outer wall portion 31 of the fixed body 3 is a portion around which the multiple flat cables 4a-4f, which are wound in one direction around the cylindrical portion 21 of the rotating body 2, are wound in the other direction. Moreover, the narrowed outer wall portion 32 of the fixed body 3 is a portion around which the multiple flat cables 4a-4f, which are wound in one direction around the cylindrical portion 21 of the rotating body 2, are not wound in the other direction. In this way, the multiple flat cables 4a-4f, which are wound in one direction around the cylindrical portion 21 of the rotating body 2, are wound around the outer wall portion 31, but are not wound around the narrowed outer wall portion 32.

[0026] Moreover, the outer wall portion 31 is not disposed to face the entire circumference of the cylindrical portion 21 of the rotor 2 in the circumferential direction, but is arc-shaped and disposed to face only a part of the cylindrical portion 21 in the circumferential direction. Moreover, the narrowed outer wall portion 32 is not disposed to face the entire circumference of the cylindrical portion 21 in the circumferential direction, but is arc-shaped and disposed to face only a part of the cylindrical portion 21, i.e., at least a part of the cylindrical portion 21 excluding the part facing the outer wall portion 31. The radial length dimension of the narrowed outer wall portion 32 is smaller than the radial length dimension of the outer wall portion 31 about the central axis O.

[0027] Further, the flat cables 4a to 4f each have reversing portions 41a, 41b, 41c, 41d, 41e, and 41f (hereinafter, referred to as 41a to 41f) where the direction of rotation of the flat cables 4a to 4f is reversed from the direction of rotation of the flat cables 4a to 4f. The reversing portions 41a to 41f are so-called U-turn portions. As shown in FIG. 2 and FIG. 3, the reversing portions 41a to 41f of the flat cables 4a to 4f move clockwise and counterclockwise in the moving space S1 where the cylindrical portion 21 of the rotating body 2 and the outer wall portion 31 of the fixed body 3 face each other in accordance with the rotation of the rotating body 2, but do not move in the narrow space S2 where the cylindrical portion 21 of the rotating body 2 and the narrow outer wall portion 32 of the fixed body 3 face each other. In this way, the reversing portions 41a to 41f of the flat cables 4a to 4f are accommodated in the moving space S1 in the accommodation space S.

[0028] If the inverted portions 41a-41f move through the narrow space S2, the curvature of the inverted portions 41a-41f when moving through the narrow space S2 becomes larger than the curvature of the inverted portions 41a-41f when moving through the movement space S1. Therefore, the durability of the flat cables 4a-4f decreases with the increase in the curvature of the inverted portions 41, making it difficult to use the rotary connector device 1 for a long period of time.

[0029] Moreover, one end of each of the flat cables 4a to 4f, which is an inner end, is provided with a connector (not shown) and is connected to the rotor connection part 22 of the rotor 2. The other end of each of the flat cables 4a to 4f, which is an outer end, is provided with a connector (not shown) and is connected to the fixed body connection part 34 of the fixed body 3. For example, the fixed body connection part 34 is provided in the moving space S1. With this configuration, the rotor connection part 22 moves relative to the fixed body connection part 34 in response to the rotation of the rotor 2, and the flat cables 4a to 4f are wound around or unwound from the cylindrical part 21 of the rotor 2, so that the inverted parts 41a to 41f of the flat cables 4a to 4f move in response to the rotation of the rotor 2.

[0030] A connector (not shown) provided at an end of the flat cables 4a-4f connected to the rotating body connecting portion 22 is electrically connected to various electronic devices such as an airbag device mounted on the steering wheel side. A connector (not shown) provided at an end of the flat cables 4a-4f connected to the fixed body connecting portion 34 is electrically connected to various electronic devices such as a vehicle control device mounted on the vehicle side. The various electronic devices on the vehicle side and the various electronic devices on the steering wheel side are electrically connected to each other via the flat cables 4a-4f of the rotary connector device 1.

[0031] Furthermore, among the multiple flat cables 4a to 4f, the flat cable 4f that is stacked at a position furthest from the cylindrical portion 21 of the rotating body 2 and the outer wall portion 31 of the fixed body 3 is a high-rigidity flat cable having a higher bending rigidity than the other flat cables 4a, 4b, 4c, 4d, and 4e (hereinafter referred to as 4a to 4e).

[0032] The flat cable 4f, which is a high-rigidity flat cable, has a rigidity adding portion 4f1 for adding rigidity to the flat cable 4f.

[0033] The stiffness adding portion 4f1 is a plate-like member that can be attached to the outer surface of the flat cable 4f. The stiffness adding portion 4f1 is formed to a size that covers the entire width and extension directions of one surface of the flat cable 4f. The stiffness adding portion 4f1 is, for example, a metal plate such as stainless steel having a thickness of 10 μm.

[0034] In the rotary connector device 1 configured as described above, the restoring force of the rigidity adding portion 4f1 acts on the flat cable 4f stacked at the farthest position from the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 among the plurality of flat cables 4a to 4f housed in the moving space S1 in a direction to make the shape linear. As a result, the flat cable 4f exerts a force in a direction in which one side of the extension direction of the flat cable 4f abuts on the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 in the moving space S1, with the inverted portion 41f as a boundary, and exerts a force in a direction in which the other side of the extension direction of the flat cable 4f abuts on the outer wall portion 31 of the fixed body 3. Therefore, the other flat cables 4a to 4e housed in the housing space S1 are pressed against the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 by the flat cable 4f on which the restoring force of the rigidity adding portion 4f1 acts. In this manner, the portions of each of the flat cables 4a to 4f wound around the cylindrical portion 21 are prevented from loosening, and the flat cables are prevented from floating off the cylindrical portion 21.

[0035] As described above, in the rotary connector device 1, the fixed body 3 has the narrow outer wall portion 32 in order to form the narrow space S2 in the housing space S having a narrow width inside the rotary connector device 1, so that the flatness of the cross-sectional shape of the steering column applied to the rotary connector device 1 can be increased. Since a steering column having such a flat shape is suitable for use in an irregular steering wheel, the rotary connector device 1 is suitable for use in a steer-by-wire system. Such a steering wheel is suitable for a retractable steering wheel that can be stored in a dashboard. In addition, a flat steering column has the advantages of making it easier to see the instrument panel (so-called instrument panel) located above the steering column while driving, and of making the space below the steering column larger, thereby making it possible to increase the space under the driver's seat. Therefore, the design freedom of the vehicle including the rotary connector device 1 is further improved.

[0036] According to the first embodiment described above, a portion of the accommodating space for accommodating the flat cable is made a narrow space, and among the multiple flat cables 4a to 4f, the flat cable 4f that is stacked at a position furthest from the cylindrical portion 21 of the rotating body 2 and the outer wall portion 31 of the fixed body 3 is made a high-rigidity flat cable having a higher bending rigidity than the other flat cables 4a to 4e, thereby making it possible to make the rotary connector device compact and to suppress floating of the flat cables.

[0037] Second embodiment FIG. 4 is a partially see-through plan view showing an example of a rotary connector device according to the second embodiment.

[0038] In the following embodiment, the same components as those in the rotary connector device 1 of the first embodiment are denoted by the same reference numerals, and duplicated explanations will be omitted or simplified.

[0039] The rotary connector device 1a of the second embodiment is basically the same as the rotary connector device 1 of the first embodiment, except that the flat cable 4f does not include the stiffness-adding portion 4f1, and the flat cable 4g ​​is laminated on the flat cable 4f and has a higher bending stiffness than the flat cables 4a to 4f. Therefore, the different configuration will be mainly described here.

[0040] 4, in the rotary connector device 1a of the second embodiment, the flat cable 4f does not include a rigidity adding portion 4f1. In addition to the flat cables 4a-4f, the rotary connector device 1a also includes a flat cable 4g ​​that is stacked at a position furthest from the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 and serves as a high-rigidity flat cable having a bending rigidity higher than that of the flat cables 4a-4f.

[0041] The flat cable 4g ​​is formed in the same shape and size as the other flat cables 4a to 4f. The flat cable 4g ​​has a plate-shaped or linear rigidity adding portion 4g1 made of a metal such as stainless steel. The rigidity adding portion 4g1 is covered with an insulator. The flat cable 4g ​​may have a conductor for transmitting power or an electric signal together with the rigidity adding portion 4g1. The flat cable 4g ​​may be formed only of the rigidity adding portion 41g1 without having an insulator.

[0042] The flat cable 4g ​​is layered adjacent to the flat cable 4f and, like the other flat cables 4a to 4f, is wound in one direction around the outer surface of the cylindrical portion 21 of the rotating body 2 and in the other direction around the inner surface of the outer wall portion 31 of the fixed body 3.

[0043] The flat cable 4g ​​has an inverted portion 41g where the direction of rotation of the flat cable 4g ​​is inverted between one direction and the other direction in the same manner as the other flat cables 4a to 4f. The inverted portion 41g of the flat cable 4g ​​moves clockwise and counterclockwise in the movement space S1 in response to the rotation of the rotor 2, but does not move in the narrow space S2.

[0044] The flat cable 4g ​​presses the other flat cables 4a-4f wound around the cylindrical portion 21 from the outside against the cylindrical portion 21 of the rotating body 2, and also presses the portions of the other flat cables 4a-4f wound around the outer wall portion 31 of the fixed body 3 from the outside, across the inverted portion 41g.

[0045] One end of the flat cable 4g, which is the inner periphery end, is connected to the rotor connecting portion 22 of the rotor 2. The other end of the flat cable 4g, which is the outer periphery end, is connected to the fixed body connecting portion 34 of the fixed body 3. With this configuration, the rotor connecting portion 22 moves relative to the fixed body connecting portion 34 in response to the rotation of the rotor 2, and the flat cable 4g ​​is wound around or unwound from the cylindrical portion 21 of the rotor 2, so that the inverted portion 41g of the flat cable 4g ​​moves in response to the rotation of the rotor 2.

[0046] In the rotary connector device 1a configured as described above, the restoring force of the rigidity adding portion 4g1 acts on the flat cable 4g ​​stacked at the farthest position from the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 among the plurality of flat cables 4a to 4g housed in the moving space S1 in a direction that makes the shape linear. As a result, the flat cable 4g ​​exerts a force on one side of the extension direction of the flat cable 4g ​​in the moving space S1, with the inverted portion 41g as a boundary, in a direction in which the flat cable 4g ​​abuts on the cylindrical portion 21 of the rotor 2, and exerts a force on the other side of the extension direction of the flat cable 4g ​​in a direction in which the flat cable abuts on the outer wall portion 31 of the fixed body 3. Therefore, the other flat cables 4a to 4f housed in the housing space S1 are pressed against the cylindrical portion 21 of the rotor 2 and the outer wall portion 31 of the fixed body 3 by the flat cable 4g ​​on which the restoring force of the rigidity adding portion 4g1 acts. In this manner, the portions of each of the flat cables 4a to 4g wound around the cylindrical portion 21 are prevented from loosening, and the flat cables are prevented from floating off the cylindrical portion 21.

[0047] According to the second embodiment described above, even if a flat cable 4g ​​having a rigidity-adding portion 4g1 arranged therein is provided instead of a rigidity-adding portion 4f1 provided on the flat cable 4f, the rotary connector device can be made compact and the floating of the flat cable can be suppressed.

[0048] Although the embodiments have been described above, the present invention is not limited to the above embodiments, but includes all aspects included in the concept and scope of the claims of the present disclosure, and can be modified in various ways within the scope of the present disclosure. [Explanation of symbols]

[0049] 1, 1a Rotating connector device 2 Rotating body 21 Cylindrical part 22 Rotating body connection part 3 Fixed body 31 Exterior wall 32 Stenosis outer wall 33 Connecting part 34 Fixed body connection part 4a, 4b, 4c, 4d, 4e, 4f, 4g flat cables 4f1, 4g1 Rigidity adding part 41a, 41b, 41c, 41d, 41e, 41f, 41g Inverted parts O Rotation axis L1 Opposing distance (first opposing distance) L2 opposing distance (second opposing distance) S Storage space S1 Moving space S2 Constricted space

Claims

1. A rotor having a cylindrical portion and capable of rotating; a fixed body having an outer wall portion and a narrowed outer wall portion disposed opposite to an outer surface of the cylindrical portion, the distance between the cylindrical portion and the narrowed outer wall portion being shorter than the distance between the cylindrical portion and the outer wall portion; a plurality of flat cables that are accommodated in a stacked state in the accommodation space between the rotating body and the fixed body, that are wound in one direction around the cylindrical portion of the rotating body and in the other direction around the outer wall portion of the fixed body, and that have a reversal portion where the rotation direction of the flat cables wound in one direction and the rotation direction of the flat cables wound in the other direction are reversed; Among the plurality of stacked flat cables, the flat cable stacked at a position farthest from the cylindrical portion and the outer wall portion is a high-rigidity flat cable having a bending rigidity higher than that of the other flat cables. Rotating connector device.

2. The high-rigidity flat cable has a rigidity adding portion that adds rigidity.

2. The rotary connector assembly of claim 1.

3. The stiffness adding portion is a plate-like member that can be attached to the outer surface of the flat cable.

3. The rotary connector assembly of claim 2.

4. The stiffening portion is covered with an insulator.

3. The rotary connector assembly of claim 2.

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