JP2008181724A - Multipolar rotating terminal mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a multi-polarized rotating terminal mechanism without giving rise to increase of an outer dimension. <P>SOLUTION: In a 12-pole rotating terminal mechanism 1, first conductive rings 14 are kept inserted between a circular inner periphery face 81 of a first outside electrode complex ring 8 and a circular outer periphery face 71 of a first inside electrode complex ring 7 concentrically arranged, in a slightly crushed state. On the circular outer periphery face 71 and the circular inner periphery face 81 of the complex rings 7, 8, electrode face parts 72a, 82a of an arc-shape electrode and insulated face parts 73a, 83a of an electric insulator alternately appear. When the fist outside electrode complex ring 8 and the first inside electrode complex ring 7 relatively rotate, the conductive rings 14, kept pressed toward the circular inner periphery face 81 and the circular outer periphery face 71 by elastic force, rotate along these faces, so that electric connection between the outside electrode and the inside electrode divided in a peripheral direction sequentially changed, but, since at least one conductive ring exists between the electrodes, electric conduction is always maintained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary terminal (slip ring) mechanism having a structure advantageous for miniaturization, which is used for transmitting electric power and signals between rotary pairs, and more particularly, a rotary terminal which is multipolar without increasing the size. It relates to the mechanism.

  A slip ring is used to keep the rotating side member and the stationary side member in an electrically connected state at all times. In the slip ring, when the number of poles increases, it is necessary to stack the corresponding number of slip rings in a coaxial state. Further, when the number of contact points is small, in order to secure the transmission capacity, it is necessary to widen the slip ring to secure the contact area. In either case, the length is increased in the axial direction, which is disadvantageous for making the slip ring thinner.

  A slip ring suitable for thinning is disclosed in Patent Document 1. The slip ring disclosed herein has a structure in which a planetary plate that rotates and revolves while being in contact with the inner ring on the movable side and the outer ring on the fixed side that are concentrically arranged. Moreover, in order to ensure the contact state of both rings and a planetary board, both rings are elastically clamped by the planetary board from the both sides of the center axis direction. The slip ring having this structure can cope with multipolarization by arranging a plurality of concentric ring pairs of inner and outer rings. Further, the contact area can be secured by increasing the number of planetary plates. Therefore, it is advantageous for reducing the thickness of the slip ring.

  However, in the slip ring including the planetary plate having this structure, it is necessary to sandwich the inner ring and the outer ring from both sides by the planetary plate including the elastic plate. In addition, an annular or arc-shaped retainer is disposed between the rings so that the planetary plate can rotate and revolve in the annular space between the rings, and a shaft is attached to the retainer, and the planetary plate is rotatable by the shaft. It is necessary to support the planetary plate in the state. Therefore, there is a problem that the structure is complicated and the number of parts is large.

On the other hand, in Patent Document 2, the outer fixed side electrode and the inner rotation side electrode are made elastic, and a spherical, cylindrical or conical conductive metal material functioning as a roller is inserted between them. A rotating electrical connector of the configuration is disclosed. According to this configuration, a slip ring having a simple structure with a small number of parts can be configured. However, it does not describe at all how to give elasticity to the ring-shaped electrode and how to insert a roller between the elastic electrodes. Therefore, it is difficult to realize the slip ring having this configuration.
JP-A-5-82223 Japanese Patent Laid-Open No. 10-223346

  Therefore, the present inventor is advantageous in downsizing because the structure and the number of parts are simple in the specification and drawings of the international patent application PCT / JP2006 / 314723 (filed on July 26, 2006). Moreover, a feasible rotating terminal mechanism is proposed. In this rotary terminal mechanism, the electrical connection between the fixed side electrode attached to the fixed side member and the rotary side electrode attached to the rotary side member is electrically inserted between them in a slightly crushed state. It is secured using a sex ring. Similar to the case where a rolling element is inserted between the outer ring and the inner ring in the rolling bearing mechanism, it is only necessary to insert a conductive ring between the electrodes. Therefore, a rotary terminal mechanism with a simple structure and a small number of parts can be realized. Further, by arranging a large number of concentric circles of fixed side electrodes and rotating side electrodes, it is possible to cope with multipolarization. Moreover, the contact area between both electrodes can be increased by increasing the number of conductive rings. Therefore, it is possible to realize a rotary terminal mechanism that is advantageous for downsizing, particularly for reducing the thickness in the central axis direction.

  Here, in the rotary terminal mechanism having this configuration, in order to realize multipolarization, it is necessary to arrange a plurality of sets of the fixed side electrode and the rotary side electrode concentrically. As a result, the outer diameter is increased. If a component such as a conductive ring is miniaturized in order to suppress an increase in the outer diameter, it becomes difficult to manufacture the component and the manufacturing cost also increases.

  The present invention relates to an improvement of the rotating terminal mechanism disclosed in the above-mentioned application, and an object thereof is to propose a rotating terminal mechanism that can achieve multipolarization without causing an increase in outer diameter.

The multipolar rotary terminal mechanism of the present invention is
A plurality of outer electrodes;
An outer electrical insulator that insulates each outer electrode from each other;
A plurality of inner electrodes;
An inner electrical insulator that insulates each inner electrode from each other;
A circular inner peripheral surface in which the electrode surface portions of the outer electrodes and the insulating surface portions of the outer electrical insulator appear alternately along the circumferential direction;
A circular shape in which the electrode surface portions of the respective inner electrodes and the insulating surface portions of the inner electrical insulator alternately appear along the circumferential direction while being arranged concentrically at regular intervals inside the circular inner peripheral surface. An outer peripheral surface,
A plurality of diametrically conductive rings inserted between the circular inner peripheral surface and the circular outer peripheral surface;
The outer diameter of the conductive ring is larger than the interval between the circular inner peripheral surface and the circular outer peripheral surface,
Each conductive ring is inserted between the circular inner peripheral surface and the circular outer peripheral surface in a state of being bent into an ellipse, and is pressed against the circular inner peripheral surface and the circular outer peripheral surface by its elastic return force. Can roll along these planes,
One of the outer electrode and the inner electrode is a fixed electrode, and the other is a rotating electrode.

  In the rotary terminal mechanism for multipoles of the present invention, the conductive material is slightly bent between the circular inner peripheral surface on the outer electrode side and the circular outer peripheral surface on the inner electrode side that are concentrically arranged. A ring is inserted. The conductive ring is held in contact with the circular inner peripheral surface and the circular outer peripheral surface by its elastic restoring force. When the outer electrode and the inner electrode rotate relative to each other, the conductive rings roll along these surfaces while maintaining the state of being pressed against the circular inner peripheral surface and the circular outer peripheral surface by an elastic force ( Rotation and revolution). Therefore, even if the outer electrode and the inner electrode are relatively rotated, an electrical connection between them is always formed.

  In addition, on the circular inner peripheral surface, electrode surface portions of the outer electrodes and insulating surface portions of the electrical insulator appear alternately. Similarly, on the circular outer peripheral surface, electrode surface portions of the respective inner electrodes and insulating surface portions of the electrical insulator appear alternately. Accordingly, it is possible to form a state in which each outer electrode and each inner electrode are electrically connected in a predetermined correspondence via the conductive ring. When the outer electrode and the inner electrode are relatively rotated, the connection relationship between each outer electrode and each inner electrode is sequentially switched in a certain order.

  Here, the present invention is characterized by having retainer spacers arranged between the conductive rings in order to keep the intervals between the conductive rings constant and reduce friction loss. As each retainer spacer, a cylindrical spacer inserted between these surfaces in a rollable state along the circular inner peripheral surface and the circular outer peripheral surface can be used. By arranging the retainer spacers, the conductive rings can be held at equiangular intervals.

  In the present invention, the arc-shaped outer electrode and the arc-shaped outer electrical insulator are alternately arranged along a circumferential direction to form an outer electrode composite ring, and the arc-shaped inner electrode And the arc-shaped inner electrical insulator are alternately arranged along the circumferential direction to form an inner electrode composite ring, and the conductive ring is interposed between the outer electrode composite ring and the inner electrode composite ring. And retainer spacers can be inserted.

  Furthermore, in the present invention, it has a fixed side case and a rotating side case having an end surface facing the end surface of the fixed side case in a coaxial state with a certain interval, and the rotating side case is a bearing. The fixed-side case is supported by the fixed-side case in a rotatable state, the fixed-side electrode is attached to the end surface of the fixed-side case, and the rotating-side electrode is attached to the end surface of the rotating-side case. Yes.

  Further, according to the present invention, the conductive ring and the retainer spacer are provided on one of the fixed side case and the rotating side case with the circular inner peripheral surface on the outer electrode side and the circular on the inner electrode side. An insertion opening for insertion between outer peripheral surfaces is formed, and the insertion opening is sealed by a lid member. By adopting a structure similar to the roller insertion structure of the rolling bearing mechanism, it is possible to easily assemble the rotating terminal mechanism in which the conductive ring is inserted.

  Next, in order to further increase the number of poles of the rotary terminal mechanism, a plurality of sets of the outer electrode composite ring and the inner electrode composite ring are arranged concentrically, and the outer electrode composite ring and the inner electrode composite of each set are arranged. The conductive ring may be inserted between the rings. Alternatively, a plurality of sets of the outer electrode composite ring and the inner electrode composite ring are arranged in the direction of the central axis thereof, and the conductive ring is interposed between the outer electrode composite ring and the inner electrode composite ring of each set. It may be inserted.

  In the multipolar rotary terminal mechanism of the present invention, the electrical connection between the fixed side electrode attached to the fixed side member and the rotary side electrode attached to the rotary side member is slightly crushed between them. It is secured using a conductive ring inserted in Similar to the case where a rolling element is inserted between the outer ring and the inner ring in the rolling bearing mechanism, it is only necessary to insert a conductive ring between the electrodes. Therefore, a rotary terminal mechanism with a simple structure and a small number of parts can be realized.

  In addition, a plurality of fixed-side electrodes divided by the electrical insulator along the circumferential direction and a plurality of rotation-side electrodes divided by the electrical insulator along the circumferential direction are in a predetermined correspondence relationship. An electrically connected state can be formed by the conductive ring. Therefore, the multi-polarization of the rotating terminal mechanism can be realized without arranging a plurality of sets of the fixed side electrode and the rotating side electrode concentrically. As a result, it is possible to realize a multipolar rotary terminal mechanism that is advantageous for suppressing an increase in outer diameter.

  Embodiments of a multipolar rotary terminal mechanism to which the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a 12-pole rotary terminal mechanism to which the present invention is applied, and FIG. 2 is a transverse sectional view showing a portion cut along the line II-II. Referring to these drawings, the 12-pole rotary terminal mechanism 1 includes a hollow rotary shaft 2, and an insulating rotary side case 3 is fixed to the outer periphery of the hollow rotary shaft 2 in a coaxial state by screws 19. ing. The rotation-side case 3 has a cylindrical boss 31 having a hollow portion in which the hollow rotation shaft 2 is fitted, and extends from the outer peripheral surface of the cylindrical boss 31 in a direction perpendicular to the central axis 2 a of the hollow rotation shaft 2. The rotating side disk 32 is integrally formed.

  In addition, on the outer periphery of the hollow rotary shaft 2, an insulative fixed side case 4 is attached so as to be rotatable in a coaxial state. The stationary case 4 has a cylindrical boss 41 supported by the outer peripheral surface portion of the hollow rotary shaft 2 via a bearing 5 so as to be rotatable, and extends from one end of the cylindrical boss 41 in the radial direction. The fixed side disk 42 is integrally formed. The fixed-side disk 42 faces the rotation-side disk 32 at a constant interval in the direction of the central axis 2a, and a cylinder extending from the outer peripheral edge thereof by bending at a right angle toward the rotation-side disk 32. 43 is integrally formed. The front end surface of the cylinder 43 is in contact with the outer peripheral edge side portion of the inner end surface 34 of the rotation side disc 32 in a slidable state.

  The rotating side case 3 and the fixed side case 4 form an annular space 6 having a substantially closed vertically long rectangular cross section. In the annular space 6, the first inner electrode composite ring 7, the first outer electrode composite ring 8, the second inner electrode composite ring 9, and the second outer electrode are concentrically arranged from the center. The composite rings 10 are arranged in this order.

  The first inner electrode composite ring 7 has an L-shaped cross-sectional shape, and only the inner peripheral edge portion thereof is a wide portion having substantially the same width as the annular space 6, and a circular outer peripheral surface 71 is formed inside the wide portion. ing. The first inner electrode composite ring 7 is composed of six arc-shaped inner electrodes 72 extending at the same angle arc and six arc-shaped electric insulators 73 extending at the same angle alternately in the circumferential direction. It is configured by arranging. Therefore, the arc-shaped inner electrodes 72 are insulated from each other by the arc-shaped insulators 73. In addition, the circular outer peripheral surface 71 of the first inner electrode composite ring 7 includes an inner electrode surface portion 72a which is an outer peripheral surface of each arc-shaped inner electrode 72 and each arc-shaped electric insulator along the circumferential direction. The inner insulating surface portions 73a which are outer peripheral surfaces of 73 appear alternately. The six arc-shaped inner electrodes 72 are fixed-side electrodes fixed to the inner peripheral edge portion of the inner end surface 44 of the fixed-side disc 42 by six conductive screws 11, respectively.

  The first outer electrode composite ring 8 has substantially the same width as the circular outer peripheral surface 71 of the first inner electrode composite ring 7, and has a circular inner peripheral surface that concentrically surrounds the circular outer peripheral surface 71 at regular intervals. 81. The first outer electrode composite ring 8 includes six arc-shaped outer electrodes 82 having an arc having the same angle and six arc-shaped electric insulators 83 having an arc having the same angle alternately in the circumferential direction. It is configured by arranging. Accordingly, the arc-shaped outer electrodes 82 are insulated from each other by the arc-shaped insulators 83. Further, on the circular inner peripheral surface 81 of the first outer electrode composite ring 8, an outer electrode surface portion 82a that is an inner peripheral surface of each arc-shaped outer electrode 82 and each arc-shaped electric electrode are provided along the circumferential direction. Outer insulating surface portions 83a that are inner peripheral surfaces of the insulator 83 appear alternately. The six arcuate outer electrodes 81 are rotation-side electrodes fixed to the inner end face 34 of the rotation-side disk 32 by six conductive screws 12. Between the circular inner peripheral surface 81 of the first outer electrode composite ring 8 and the circular outer peripheral surface 71 of the first inner electrode composite ring 7, a first annular space 13 having a constant width and a constant thickness is formed. Is formed.

  In the first annular space 13, a plurality of first conductive rings that can be bent in the radial direction, in the illustrated example, eight first conductive rings 14 are inserted. The widths of these first conductive rings 14 are slightly narrower than the thickness of the first annular space 13 (the dimension in the direction of the central axis 2a). However, the outer diameter of the conductive ring 14 is slightly larger than the width of the first annular space 13, that is, the radial interval between the circular outer peripheral surface 71 and the circular inner peripheral surface 81. Therefore, these first conductive rings 14 are inserted into the first annular space 13 in a state of being slightly bent in an elliptical shape, and the elastic return force thereof causes the first inner electrode 7 to be deformed. It is pressed against the circular outer peripheral surface 71 and the circular inner peripheral surface 81 of the first outer electrode 8. Further, in this state, the conductive ring 14 is capable of rolling (rotating and revolving) along these surfaces 71 and 81.

  In this example, the first conductive rings 14 are held between the first conductive rings 14 in order to hold the first conductive rings 14 at equiangular intervals along the circumferential direction in the first annular space 13. The first cylindrical retainer spacer 15 is inserted into a flat cylindrical shape in contact with them. The retainer spacer 15 has substantially the same width as the first conductive ring 14, and the outer diameter thereof is the distance between the circular outer peripheral surface 71 of the first inner electrode 7 and the circular inner peripheral surface 81 of the first outer electrode 8. Is the same or slightly smaller. Accordingly, each first retainer spacer 15 can roll along the circular outer peripheral surface 71 and the circular inner peripheral surface 81 in the first annular space 13. These first retainer spacers 15 are made of an insulating resin.

  Next, the second inner electrode composite ring 9 is arranged outside the first outer electrode composite ring 8 with a certain interval. The second inner electrode composite ring 9 has the same cross-sectional shape as the first outer electrode composite ring 8 and includes a circular outer peripheral surface 91. This second inner electrode composite ring 9 is composed of six arc-shaped inner electrodes 92 extending in an arc of the same angle and six arc-shaped electric insulators 93 extending in an arc of the same angle in the circumferential direction. It is comprised by arranging in. Therefore, the arc-shaped inner electrodes 82 are insulated from each other by the arc-shaped insulators 83. Further, on the circular outer peripheral surface 91 of the second inner electrode composite ring 9, an inner electrode surface portion 92 a that is an outer peripheral surface of each arc-shaped inner electrode 92 and each arc-shaped electric insulator are arranged along the circumferential direction. The inner insulating surface portions 93a which are the outer peripheral surfaces of 93 appear alternately. The six arc-shaped inner electrodes 92 are rotation-side electrodes fixed to the inner end face 34 of the rotation-side disk 32 by six conductive screws 16.

  A second outer electrode composite ring 10 is arranged outside the second inner electrode composite ring 9 with a certain interval. The second outer electrode composite ring 10 has an L-shaped cross-sectional shape, and only an outer peripheral edge portion thereof has an L-shaped cross-sectional shape having substantially the same width as the annular space 6, and its circular inner peripheral surface 101 concentrically surrounds the inner circular outer peripheral surface 91 at regular intervals.

  The second inner electrode composite ring 10 includes six arc-shaped outer electrodes 102 extending in the same angle arc and six arc-shaped electric insulators 103 extending in the same angle alternately in the circumferential direction. It is configured by arranging. Accordingly, the arc-shaped outer electrodes 102 are insulated from each other by the arc-shaped insulators 103. In addition, the circular inner peripheral surface 101 of the second inner electrode composite ring 101 has an outer electrode surface portion 102a that is an inner peripheral surface of each arc-shaped outer electrode 102 and each arc-shaped electric surface along the circumferential direction. The outer insulating surface portions 103a that are the inner peripheral surface of the insulator 103 appear alternately. The six arcuate outer electrodes 102 are fixed electrodes fixed to the inner peripheral edge portion of the inner end surface 44 of the fixed disk 42 by six conductive screws 17.

  Between the circular outer peripheral surface 91 of the second inner electrode composite ring 9 and the circular inner peripheral surface 101 of the second outer electrode composite ring 10, a second annular ring having the same cross section as the first annular space 13 is provided. A space 23 is formed. In the second annular space 23, a plurality of, in the illustrated example, 17 second conductive rings 24 are inserted. The second conductive ring 24 has the same shape as the first conductive ring 14 and is inserted into the second annular space 23 by being slightly bent into an elliptical shape.

  Further, between the second conductive rings 24, resin-made flat columnar second retainer spacers 25 are arranged. The second retainer spacer 25 has the same shape as the first retainer spacer 15.

  Here, in the first inner electrode composite ring 7 and the first outer electrode composite ring 8, the arc-shaped inner electrode 72 and the arc-shaped outer electrode 82 have an arc shape with the same angle. In addition, the angle of these arcs is always set to a value that allows at least one first conductive ring 14 to be positioned between one arc-shaped inner electrode 72 and one arc-shaped outer electrode 82. ing.

  Also in the outer second inner electrode composite ring 9 and the second outer electrode composite ring 10, the arc-shaped inner electrode 92 and the arc-shaped outer electrode 102 have an arc shape with the same angle. In addition, the angle of these arcs is always set to a value at which at least two second conductive rings 24 can be positioned between one arc-shaped inner electrode 92 and one arc-shaped outer electrode 102. ing.

  As described above, in the 12-pole rotary terminal mechanism 1 of this example, a set of the first inner electrode composite ring 7, the first outer electrode composite ring 8, the conductive ring 14, and the retainer spacer 15 is formed concentrically. A set of the second inner electrode composite ring 9, the second outer electrode composite ring 10, the second conductive ring 24, and the second retainer spacer 25 is arranged.

  Further, in the rotary terminal mechanism 1 of the present example, the rotary side disc 32 in the rotary side case 3 is formed with a long hole 35 in the radial direction at a position A indicated by an imaginary line in FIG. The elongated holes 35 connect the first conductive ring 14 and the first retainer spacer 15, and the second conductive ring 24 and the second retainer spacer 25, respectively, to the first annular space 13 and the first annular space 13. This is an insertion opening for insertion into the two annular spaces 23. The elongated hole 35 is blocked by an oval blocking plate 36 having the same contour shape and the same thickness. In this example, the first outer electrode 8 and the second inner electrode 9 fixed to the rotation side disk 32 are fixed by two screws 12 and 16.

  Furthermore, in this example, an electrical insulator ring 18 is inserted between the first outer electrode composite ring 8 and the second inner electrode composite ring 9.

  In the 12-pole rotary terminal mechanism 1 configured as described above, the six conductive screws 11 fixing the six arc-shaped inner electrodes 72 in the first inner electrode composite ring 7 are first to sixth. The first to sixth fixed-side lead wires (not shown) are drawn out from these. In addition, the six conductive screws 12 fixing the six arc-shaped outer electrodes 82 in the first outer electrode composite ring 8 function as first to sixth rotation side terminal portions, and from there 1st-6th rotation side lead wire (not shown) is pulled out.

  Similarly, the six conductive screws 17 fixing the six arc-shaped outer electrodes 102 in the second outer electrode composite ring 10 function as seventh to twelfth fixed-side terminal portions, and from these Seventh to twelfth fixed-side lead wires (not shown) are drawn out. Further, the six conductive screws 16 fixing the six arc-shaped inner electrodes 92 in the second inner electrode composite ring 9 function as the seventh to twelfth rotation side terminal portions, and from these Seventh to twelfth rotation-side lead wires (not shown) are drawn out.

  Here, between the circular inner peripheral surface 81 of the first outer electrode composite ring 8 and the circular outer peripheral surface 71 of the first inner electrode composite ring 7 arranged concentrically, in a slightly crushed state. A first conductive ring 14 is inserted. Each of the first conductive rings 14 has one arcuate outer electrode 82 in the first outer electrode composite ring 8 and one arcuate shape in the first inner electrode composite ring 7 due to its elastic restoring force. The inner electrode 72 is always kept in electrical contact. When the first inner electrode composite ring 7 rotates once, each of the six arc-shaped outer electrodes 82 is connected to the inner six arc-shaped inner electrodes 72 via the first conductive ring 14. , Switch sequentially.

  Similarly, between the circular inner peripheral surface 101 of the second outer electrode composite ring 10 and the circular outer peripheral surface 91 of the second inner electrode composite ring 9 arranged concentrically, in a slightly crushed state. A second conductive ring 24 is inserted. Between the one arcuate outer electrode 102 in the second outer electrode composite ring 10 and the one arcuate inner electrode 92 in the second inner electrode composite ring 9, two second conductive rings 24 are provided. Therefore, it is always kept in electrical contact. When the second inner electrode composite ring 9 rotates once, each of the six arc-shaped outer electrodes 102 is connected to the inner six arc-shaped inner electrodes 92 via the second conductive ring 24. However, it switches sequentially.

  In this way, the 12-pole rotary terminal mechanism 1 of this example is similar to the case where the rolling element is inserted between the outer ring and the inner ring in the rolling bearing mechanism, and between both electrode composite rings 7 and 8 and both electrodes. It can be constructed by simply inserting conductive rings 14 and 24 between the composite rings 9 and 10, respectively. Therefore, a rotary terminal mechanism with a simple structure and a small number of parts can be realized.

  Each of the electrode composite rings 7, 8, 9, 10 is divided into a plurality of electrodes with an electrical insulator sandwiched along the circumferential direction. Therefore, it is possible to realize multipolarization of the rotating terminal mechanism without causing an increase in outer diameter as compared with a case where a large number of pairs of fixed-side electrodes and rotating-side electrodes are arranged concentrically to multipolarize the rotating terminal mechanism.

  Furthermore, by increasing the number of conductive rings 14 and 24, the contact area between both electrodes can be increased.

(Other embodiments)
Although the above example is a 12-pole rotary terminal mechanism, it goes without saying that the present invention can be similarly applied to rotary terminal mechanisms having other numbers of poles.

  In the above example, the outer electrodes are arc-shaped electrodes having the same shape arranged at equal angular intervals, and the inner electrodes are also arc-shaped electrodes having the same shape arranged at equal angular intervals. Are the same. It is good also as an arc-shaped electrode which has arrange | positioned an outer electrode at unequal angle intervals. Moreover, it is good also as an arc-shaped electrode which has arrange | positioned an inner side electrode at unequal angular intervals. Furthermore, the number of outer electrodes and inner electrodes may be different.

  Next, in the above example, two sets of the inner electrode and the outer electrode are concentrically arranged, but one set may be used, or three or more sets may be used.

  In addition, a multipolar rotary terminal mechanism can be constructed by arranging a set of inner and outer electrodes in the direction of the central axis 2a.

  Further, the above example is a unit configured to attach the hollow rotary shaft 2 of the multipolar rotary terminal mechanism 1 to the output shaft of the motor or the rotary output shaft of the rotary actuator. Instead of this, it is also possible to incorporate directly into a rotation mechanism such as a motor or a rotation actuator. For example, the hollow rotary shaft 2 can be omitted and can be directly assembled to the rotary shaft of the motor.

It is a longitudinal cross-sectional view which shows the rotating terminal mechanism for 12 poles to which this invention is applied. It is a cross-sectional view which shows the part cut | disconnected by the II-II line | wire of FIG.

Explanation of symbols

1 12-pole rotating terminal mechanism 2 hollow rotating shaft 2a central axis 3 rotating side case 4 fixed side case 5 bearing 6 annular space 7 first inner electrode composite ring 8 first outer electrode composite ring 9 second inner electrode composite Ring 10 Second outer electrode composite ring 11, 12, 16, 17, 19 Screw 13 First annular space 14 First conductive ring 15 First retainer spacer 18 Electrical insulator ring 23 Second annular Space 24 Second conductive ring 25 Second retainer spacer 31 Cylindrical boss 32 Rotating side disk 34 Inner end face 35 Elongate hole 36 Sealing plate 41 Cylindrical boss 42 Fixed side disk 43 Cylinder 44 Inner end face 71, 91 Circular Outer peripheral surfaces 72, 92 Arc-shaped inner electrodes 72a, 92a Inner electrode surface portions 73, 93 Arc-shaped electrical insulators 73a, 93a Inner insulating surface portions 81, 101 Circular inner peripheral surface 82 , 102 Arc-shaped outer electrodes 82a, 102a Outer electrode surface portions 83, 103 Arc-shaped electrical insulators 83a, 103a Outer insulating surface portions

Claims (9)

A plurality of outer electrodes;
An outer electrical insulator that insulates each outer electrode from each other;
A plurality of inner electrodes;
An inner electrical insulator that insulates each inner electrode from each other;
A circular inner peripheral surface in which the electrode surface portions of the outer electrodes and the insulating surface portions of the outer electrical insulator appear alternately along the circumferential direction;
A circular shape in which the electrode surface portions of the respective inner electrodes and the insulating surface portions of the inner electrical insulator alternately appear along the circumferential direction while being disposed concentrically at regular intervals inside the circular inner peripheral surface. An outer peripheral surface,
A plurality of diametrically conductive rings inserted between the circular inner peripheral surface and the circular outer peripheral surface;
The outer diameter of the conductive ring is larger than the interval between the circular inner peripheral surface and the circular outer peripheral surface,
Each conductive ring is inserted between the circular inner peripheral surface and the circular outer peripheral surface in a state of being bent into an ellipse, and is pressed against the circular inner peripheral surface and the circular outer peripheral surface by its elastic return force. Can roll along these planes,
One of the outer electrode and the inner electrode is a fixed-side electrode, and the other is a rotating-side electrode. In order to keep the interval between the conductive rings constant, it has a retainer spacer disposed between the conductive rings,
2. The multipolar rotary terminal mechanism according to claim 1, wherein each retainer spacer is rollable along the circular outer peripheral surface and the circular inner peripheral surface. An outer electrode composite ring having a structure in which the arc-shaped outer electrode and the arc-shaped outer electric insulator are alternately arranged along a circumferential direction;
The inner electrode composite ring having a structure in which the arc-shaped inner electrode and the arc-shaped inner electric insulator are alternately arranged along a circumferential direction,
The multi-polar rotating terminal mechanism according to claim 2, wherein the conductive ring and the retainer spacer are inserted between the outer electrode composite ring and the inner electrode composite ring. Each outer electrode is an arc-shaped electrode of the same shape arranged at equiangular intervals,
Each inner electrode is an arc-shaped electrode of the same shape arranged at equiangular intervals,
4. The multipolar rotary terminal mechanism according to claim 3, wherein the number of the outer electrode and the inner electrode is the same. Each outer electrode is an arc-shaped electrode arranged at equal angular intervals or unequal angular intervals,
Each inner electrode is an arcuate electrode arranged at equal angular intervals or unequal angular intervals,
4. The multipolar rotary terminal mechanism according to claim 3, wherein the number of the outer electrode and the inner electrode is the same or different. A fixed case,
A rotating side case having an end face facing the end face of the fixed side case in a coaxial state with a constant interval;
The rotating side case is supported by the fixed side case in a freely rotatable state via a bearing,
The multi-pole according to claim 4 or 5, wherein the fixed-side electrode is attached to the end face of the fixed-side case, and the rotating-side electrode is attached to the inner end face of the rotating-side case. Rotating terminal mechanism. An insertion opening for inserting the conductive ring and the retainer spacer between the circular inner peripheral surface and the circular outer peripheral surface is formed in one of the fixed side case and the rotation side case,
The multipolar rotary terminal mechanism according to claim 6, wherein the insertion opening is sealed by a lid member. A plurality of sets of the outer electrode composite ring and the inner electrode composite ring are arranged concentrically,
The conductive ring and the retainer spacer are inserted between the outer electrode composite ring and the inner electrode composite ring of each set, respectively, according to any one of claims 3 to 7. The multipolar rotary terminal mechanism described. A plurality of sets of the outer electrode composite ring and the inner electrode composite ring are arranged in the direction of the central axis,
The conductive ring and the retainer spacer are inserted between the outer electrode composite ring and the inner electrode composite ring of each set, respectively, according to any one of claims 3 to 8. The multipolar rotary terminal mechanism described.

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