JP4647930B2 - Non-contact connector - Google Patents

Description

  The present invention relates to a non-contact connector that performs non-contact transmission / reception of data. More specifically, the present invention relates to a non-contact connector in which an optical element is provided on a side surface of a cylindrical rotating body and data is transmitted and received without contact with an optical element provided on a fixed body.

  Conventionally, various signal processing has been performed by connecting a wire directly between the rotating side and the fixed side and transmitting, for example, a video signal from a camera attached to the rotating side to the fixed side. In many cases, a connector for connection is used to connect the rotating side and the fixed side. However, recently, with the progress of wireless technology for wiring, it has become possible to transmit and receive data without directly connecting the wiring by infrared communication or the like. For this reason, a non-contact connector can be configured on the rotating side and the fixed side without any confusion in wiring. In addition, data transmission / reception is usually performed between the rotating side and the fixed side in a non-contact manner using an optical coupler in which a light emitter and a light receiver are combined.

However, when data is transmitted and received wirelessly from the rotation side to the fixed side, there is a problem that it is difficult to supply power in a non-contact manner from the fixed side to the rotation side. For this reason, conventionally, a light emitting element is provided on the upper part of the disk-shaped rotating body, and a light receiving element is provided at a position corresponding to the light emitting element on the fixed side. A rotary transformer winding is provided on both of the fixed sides to supply power to the photoconductor in a non-contact manner (for example, Patent Document 1 below).
JP 2002-75760 A

  However, it is desired to transmit and receive multi-channel data in a non-contact manner due to an increase in the amount of data handled recently. However, when a light emitting element is provided on the upper part of a disk of a rotating body, the number of elements is limited. The amount of data handled was also limited. Further, when the number of elements is increased, there is a problem of interference between channels between adjacent elements.

  Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a non-contact connector that transmits / receives multi-channel data without contact and has no interference between channels.

  In order to achieve the above object, the present invention provides a rotating side optical element disposed on a rotating body that rotates around a rotation axis, and a fixed side optical element disposed on the fixed body at a position facing the rotating side optical element. A non-contact connector configured to transmit and receive data in a non-contact manner between the rotating side optical element and the fixed side optical element, and between the rotating body and the fixed body, the rotating side optical element or the fixed side light An aperture that allows light emitted from the element to pass therethrough is provided. Thereby, for example, it is possible to provide a non-contact connector that transmits and receives data through multiple channels and has no interference between channels.

  Further, in the non-contact connector according to the present invention, the aperture has a plurality of holes for transmitting emitted light, and the width of each hole is a light emitting element as one of the optical elements, and a light receiving element as the other, When the light receiving element is positioned at one end of the hole, the light receiving element is positioned at the other end of the hole. Thereby, for example, the light receiving element can receive light from the light emitting element without interruption.

  In the non-contact connector according to the present invention, the width of the hole provided in the aperture is such that two light emitting elements at the shortest distance are not simultaneously output to one light receiving element. Thereby, for example, the light receiving element can continuously receive light from the light emitting element without interruption.

  Furthermore, the present invention is characterized in that, in the non-contact connector, the rotation-side optical element is disposed in a rotating body and is disposed substantially at the center of the rotation shaft. Thereby, for example, the light receiving element can continuously receive light from the light emitting element.

  Furthermore, the present invention is characterized in that, in the non-contact connector, a plurality of the rotation side optical elements are arranged on a plurality of concentric circles having different radii around the rotation axis. Thereby, for example, data can be transmitted and received by multiple channels.

  Furthermore, the present invention is characterized in that, in the non-contact connector, a plurality of the rotation side optical elements are arranged along a plurality of radial directions around the rotation axis. Thereby, for example, data can be transmitted and received by multiple channels.

  Further, according to the present invention, in the non-contact connector, the data output from the fixed side optical element is input, the rotational side optical element from which the data is input is identified, and the identified rotational side light is identified. It has a switching means for switching the output of the data so as to correspond to the element. Thereby, for example, even when input data of a plurality of channels is received by the fixed body, it is possible to identify which channel the data is the data and output it to the designated wiring.

  Furthermore, the present invention is characterized in that in the above non-contact connector, a transformer winding is provided on both the rotating body and the fixed body, and electric power is supplied from the fixed body to the rotating body by the winding in a non-contact manner. . Thereby, for example, power can be supplied to the rotating body in a non-contact manner.

  The non-contact connector according to the present invention includes an aperture having a plurality of holes for condensing light from the light emitting element between the rotating body and the fixed body, so that transmission / reception of data through multiple channels is non-contact In addition, a non-contact connector without interference between channels can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a non-contact connector 10 to which the present invention is applied. As shown in FIG. 1, the non-contact connector 10 includes a rotating body 1 and a fixed body 2 as a whole. The rotating body 1 is formed in a hollow shape and is configured to rotate by a rotational drive from a main body device (not shown). As shown in FIG. 1, the rotating body 1 rotates around a rotation shaft 4. The fixed body 2 is positioned by a bearing 21 and formed in a ring shape so as to surround the rotating body 1. The fixed body 2 can receive data from the rotating body 1 in a non-contact manner.

  The rotating body 1 includes a rotation-side electric circuit unit 11, a holding plate 12, a rotation-side optical element 13, and a rotation-side transformer winding 14. The rotation-side electric circuit unit 11 is attached to the rotating body 1 and performs each data processing. For example, when the camera is attached to the rotating body 1 as the main body device, the captured image is converted into RGB (red, green, blue) three primary color data and subjected to processing such as compression if necessary and output to the fixed body 2 Is to do. The rotation-side electric circuit unit 11 outputs drive data for light emission of the rotation-side optical element 13. In FIG. 1, the rotation-side electric circuit unit 11 is attached to the lower part of the rotating body 1, but is not attached to such a form, for example, is attached to the main body side away from the rotating body 1. Also good.

  The holding plate 12 is attached to the upper part of the rotating body 1 and provided at a position facing the fixed-side optical element 22 of the fixed body 2. The holding plate 12 is for holding the optical element 13 of the rotating body 1.

  The rotation side optical element 13 is provided on the upper part of the holding plate 12. The optical element 13 is arranged so as to output data input to the electric circuit unit 11 to the fixed body 2 by drive data from the rotation-side electric circuit unit 11. In this case, the rotation-side optical element 13 is composed of one or a plurality of optical elements. In this embodiment, one light emitting element among the one rotation side optical elements 13 can transmit data for one channel.

  The rotation-side transformer winding 14 is provided at the outer peripheral position of the rotating body 1, and electric power is supplied by a rotating transformer composed of the rotating body 1 and the fixed body 2. With this electric power, the rotation-side electric circuit unit 11, the rotation-side optical element 13, and, if necessary, the main unit are operated. The power supply by the rotary transformer will be described later.

  Next, the fixed body 2 will be described. The fixed body 2 includes a bearing 21, a fixed-side optical element 22, a fixed-side electric circuit unit 23, and a fixed-side transformer winding 24.

  The bearing 21 is formed of a nonmagnetic resin or the like, and is provided for mechanically connecting the fixed body 2 and the rotating body 1. The fixed body 2 is positioned by the bearing 21 at the position shown in FIG. In some cases, the bearing 21 is not used. In this case, for example, the fixed body 2 itself is connected to a fixed device (not shown) to align the fixed body 2 and the rotating body 1.

  The fixed side optical element 22 is provided on the fixed body 2 at a position facing the rotation side optical element 13 and receives light from the rotation side optical element 13 attached to the rotary body 1. With this light reception, data can be transmitted and received between the rotating body 1 and the fixed body 2 in a non-contact manner. The fixed side optical element 22 is also composed of one or a plurality of optical elements. In addition, one light receiving element among the fixed side optical elements 22 can receive data for one channel. Further, the light receiving elements of the fixed side light elements 22 are fixed in the same number or more as the rotation side light emitting elements so that the light from the light emitting elements of the rotation side light elements 13 can be continuously received. It is provided on the body 2.

  The fixed-side electric circuit unit 23 is provided in the vicinity of the fixed-side optical element 22 of the fixed body 2. Data from the fixed side optical element 22 is received and output as data on the main device side. The fixed-side electric circuit unit 23 includes a multiplexer, which will be described later, so as to determine which channel the data received by the fixed-side light receiving element is, and output each channel to each designated wiring. It is configured.

  The fixed-side transformer winding 24 supplies the power supplied from the fixed-side device to the rotating-side transformer winding 14 of the rotating body 1. The fixed-side transformer winding 24 is provided at a position facing the rotary-side transformer winding 14.

  Next, FIG. 2 is the figure which looked at the non-contact connector 10 from the upper surface. The rotating body 1 and the fixed body 2 constituting the connector 10 are formed in a circular shape, and the rotating body 1 is provided on the center side thereof, and the fixed body 2 is provided along the outer periphery thereof. Since the fixed body 2 is actually configured to cover the rotating body 1, when the connector 10 is viewed from above, the rotating body 1 is hidden behind the fixed body 2, but for convenience of explanation, FIG. As shown.

  FIG. 3 is a diagram for explaining power supply from the stationary body 2 to the rotating body 1. The fixed-side transformer winding 24 of the fixed body 2 is supplied with a power supply current from a fixed-side device (not shown). Since this fixed-side transformer winding 24 is attached to the side surface of the fixed body 2 by being wound around the core, a magnetic field is generated around the core of the fixed body 2 when a current flows. Since this magnetic field is also induced in the core of the rotating body 1, a current is generated in the rotating transformer winding 14 that is wound around and attached to the side surface of the rotating body 1. Thereby, the electric power from the stationary device is supplied to the rotating body 1. When this electric power is supplied to the rotation-side electric circuit unit 11, the electric circuit unit 11 is driven to cause the rotation-side optical element 13 to emit light. The fixed-side electric circuit unit 23 of the fixed body 2 is directly supplied with electric power from the fixed-side device, and drives the fixed-side optical element 22 to receive light.

  FIG. 4 is a view showing another form of the non-contact connector 10. In the connector 10 shown in FIG. 4, the rotating body 1 is formed in a cylindrical shape, and one or a plurality of rotation-side optical elements 13 are provided on the side surface. The fixed body 2 is formed so as to surround the cylindrical rotary body 1, and one or a plurality of fixed side optical elements 22 are provided on the inner wall so as to face the rotation side optical element 13. Other parts constituting the rotating body 1, that is, the rotating-side electric circuit unit 11 and the rotating-side transformer winding 14 are the same as those in FIG. Further, the other parts constituting the fixed body 2, that is, the bearing 21, the fixed-side electric circuit portion 23, and the fixed-side transformer winding 24 have the same configuration as that in FIG. As described with reference to FIGS. 1 and 3, power is supplied to the rotation-side electric circuit unit 11 from a fixed-side device (not shown) of the main body device to the fixed-side winding 24, and the rotation-side winding is caused by the generated magnetic field. A current is induced in the line 14 to serve as a power source for the electric circuit unit 11.

  Here, when the rotation side optical element 13 is provided on the upper part of the disk of the rotating body 1 as shown in FIG. 1, the number of the rotation side optical elements 13 is limited by the area of the disk. Even when each optical element 13 can transmit data for one channel, the number of channels of data to be handled is also limited. On the other hand, when the rotating body 1 is formed in a cylindrical shape as shown in FIG. 4 and the rotation-side optical element 13 is provided on the side surface thereof, the longer the cylinder, the longer the rotation-side optical element 13 and the fixed-side optical element 22. The number of can be increased. Therefore, the number of channels can be easily increased by providing the rotation-side optical element 13 on the cylindrical side surface as shown in FIG. 4 rather than providing the rotation-side element 13 on the upper part of the disk shown in FIG. In recent years, since the amount of data handled by the main unit has increased, the non-contact connector 10 is also required to be multi-channeled. By thus making the rotating body 1 cylindrical, transmission / reception of such multi-channel data is possible. It becomes easy to do.

  In this case, the optical element 13 is formed along the outer periphery of the cylindrical rotating body 1 over a plurality of stages. However, Patent Document 1 described above using the optical element as a light receiving element and a light emitting element on the outer periphery of one stage. Bidirectional data transmission / reception can be performed by arranging as shown in FIG. Of course, the combination of the light receiving element and the light emitting element may be a light receiving element at a certain arbitrary stage and a light emitting element at a different stage. In these cases, the fixed-side optical element 22 of the fixed body 2 may be arranged to be a light-receiving element and a light-emitting element at a position facing the rotation-side optical element 13. For example, when the optical element 13 is disposed as a light emitting element on the entire outer periphery of a stage of the rotating body 1, the optical element 22 of the fixed body 2 is the light receiving element and the rotating body 1 at the stage facing the light emitting element of the rotating body 1. What is necessary is just to arrange | position as a light emitting element in the step facing this light receiving element.

  FIG. 5 is a perspective view of a non-contact connector 10 of another form when the rotating body 1 is configured in a cylindrical shape. However, for convenience of explanation, only the optical elements 13 and 22 on both the rotating side and the fixed side are shown. The rotating body 1 is configured in a two-stage cylindrical shape with two disks around the rotating shaft 4. Four rotation-side optical elements 13 are provided on each side of the upper surface of the disk. A fixed body 2 is provided on the outer periphery of the rotating body 1, and eight fixed side optical elements 22 are provided at each stage. The number of rotation-side optical elements 13 is four in each stage, and the fixed-side optical element 22 has eight elements in each stage. This is because the light emitted from the rotation-side element 13 is continuously transmitted through the fixed-side optical element 22. This is because of receiving automatically. Although the example shown in FIG. 5 has a two-stage configuration, a three-stage configuration may be used to configure as shown in FIG. Of course, in order to realize a multi-channel configuration, the number of stages can be increased to four, five, or a plurality of stages. In the example of FIG. 5, since each stage includes four rotation-side optical elements (light-emitting elements) 13, it is possible to transmit and receive data for eight channels in total.

  FIG. 6 is still another embodiment of the non-contact connector 10. As in FIG. 1, the rotation side optical element 13 is provided on the disk side of the rotating body 1, but multi-channeling is realized by providing a plurality of disks. That is, one or a plurality of rotation-side optical elements 13 are provided on the lower surface of each disk of the rotating body 1, and the disk of the fixed body 2 is provided on the surface facing the disk of the rotating body 1. A fixed-side optical element 22 is provided on the upper surface. Also in this figure, portions other than the elements 13 and 22 are omitted. In the drawing, each disk is composed of two stages, but by further increasing the number of stages to three and four, a multi-channel meeting the requirements can be realized. In the case of FIG. 6 as well, since each stage has four rotation side optical elements (light emitting elements) 13, it is possible to transmit and receive data for eight channels in total. Similarly to the case of FIG. 5, the number of rotation side optical elements 13 attached to the disk can be increased or the number of stages can be increased to transmit / receive multi-channel data.

  FIG. 7 is a diagram illustrating a specific configuration of the electric circuit unit 11 on the rotating side and the electric circuit unit 23 on the fixed side. This figure shows data CH. 1-CH. The example in the case of performing 4 transmission / reception is shown. As shown in FIG. 7, the electric circuit unit 11 includes four interface (I / F) circuits 111 to 114 and four drive circuits 116 to 119.

  Each of the I / F circuits 111 to 114 includes data CH. 1-CH. 4 is input and converted into data that can be processed in the electric circuit unit 11. In the case of FIG. 7, since the connector 10 is capable of transmitting and receiving data of four channels, I / Fs 111 to 114 (four in total) are provided for each channel.

  The drive circuits 116 to 119 are circuits that generate drive data for driving the rotation-side optical element 13, and the data output from the I / F circuits 111 to 114 is input to correspond to the data. Drive data is generated. There are as many drive circuits 116 to 119 as there are channels corresponding to the input channels (four in total). The generated drive data is supplied to the rotation side optical elements 131 to 134, respectively.

  The rotation side optical elements 131 to 134 emit light corresponding to the drive data by photoelectric conversion or the like based on the drive data supplied from the respective drive circuits 116 to 119. In the case of this example, the rotation side optical elements 131 to 134 are light emitting elements and are composed of a number of elements corresponding to the number of input channels (four in this embodiment).

  As described above, the fixed side optical elements 221 to 228 are configured to receive the light from the rotation side optical elements 131 to 134 continuously without interruption when the rotating body 1 is rotating. The number of elements is equal to or more than that of the elements 131 to 134. In the case of FIG. 7, the light receiving elements 221 to 228 are configured. The light from the rotation side light emitting elements 131 to 134 only needs to be received by any of the fixed side elements 221 to 228. For example, the light from the element 131 may be received by the element 221 or the element 225. In the case of this example, the fixed side optical elements 221 to 228 function as light receiving elements.

  As shown in FIG. 7, the fixed-side electric circuit unit 23 includes receiving circuits 2311 to 2318 connected to the fixed-side optical elements 221 to 228, a multiplexer 232, and interface (I / F) circuits 236 to 239. Consists of

  The receiving circuits 2311 to 2318 are connected to the fixed side optical elements 221 to 228 and to the multiplexer 232, and receive light reception signals from the fixed side optical elements 221 to 228, respectively. The reception circuits 2311 to 2318 convert the received light signals into data that can be processed by the fixed-side electric circuit unit 23 and output the data to the multiplexer 232. In this example, since there are eight optical elements 221 to 228, there are eight receiving circuits 2311 to 2318 corresponding to these elements.

  The multiplexer 232 is for switching the input data so that the data from each of the receiving circuits 2311 to 2318 is input and the data is supplied to the output stage of the corresponding channel. Actually, it is composed of a plurality of logic circuits. In the case of this example, since the connector 10 can transmit and receive four channels, four output stages are provided correspondingly.

  The I / F circuits 236 to 239 receive the data supplied from the multiplexer 232 and convert it into data that can be output to the outside. In this example, since the multiplexer 232 has four output stages, there are four interface circuits. Then, each I / F circuit 236 to 239 is output to an output stage corresponding to the channel of the input data. In FIG. 1, CH. 2, CH. 3, CH. 4 output data is output.

  An example of the operation including the electric circuit units 11 and 23 configured as described above will be described with reference to FIGS. 8 and 9 as appropriate.

  First, when power is turned on in the fixed side device, power is supplied to the fixed side electric circuit unit 23 shown in FIGS. 1 and 4 at an appropriate timing. Further, the rotating body 1 of the connector 10 is rotated by driving the rotation side device. For example, if the rotation side device is a camera that can rotate 360 °, the camera itself rotates to take a picture, and the rotating body 1 also rotates. Further, power is also supplied to the fixed transformer winding 24. By supplying current to the winding 24, a magnetic field is generated as described above, and electric power is supplied to the rotating transformer winding 14 of the rotating body 1. Thereby, the rotation side optical element 13 can be driven. When data is supplied to the connector 10 from the main body side, the data relating to the rotation-side electric circuit unit 11 is input as shown in FIG. Examples of data are shown in FIGS.

  The example of FIG. 8 is an example in which different data (for example, video and audio data, respectively) is input to channel 1 (CH.1) and channel 3 (CH.3). Also, clock data for synchronization with the data of channel 1 and channel 3 is input to channel 2 (CH.2) and channel 4 (CH.4), respectively. In this way, different data is generated for each channel and input to the connector 10. Note that such data generation and data separation for each channel are performed by a processing circuit (not shown) of the fixed-side device.

  The data shown in FIG. 8 is input to the drive circuits 116 to 119 via the I / Fs 111 to 114 of the electric circuit unit 11, respectively. Here, the drive circuit 117 to which the data of the channel 2 is input performs a process of raising the level of the data to a predetermined level (for example, a double level) higher than the input level. By doing in this way, the multiplexer 232 can identify which data is the data of the channel 2 among the data received by any one of the optical elements 221 to 228 of the fixed body 2. Then, the channel on which the light received by the fixed side light elements (light receiving elements) 221 to 228 is identified from the arrangement on the disk of the rotation side light elements (light emitting elements) 131 to 134 or the arrangement on the cylinder. Can do. For example, it is assumed that data of channel 2 is emitted from the light emitting element 132 and received by the light receiving element 222. At that time, the arrangement relationship of the light emitting elements, for example, the light emitting elements are arranged in order of the light emitting element 131 of the channel 1, the light emitting element 132 of the channel 2, the light emitting element 133 of the channel 3, and the light emitting element 134 of the channel 4 in order clockwise on the disk. As a result, the data received by the light receiving element 224 is identified as channel 3 data, the data received by the light receiving element 226 is identified as channel 4 data, and the data received by the light receiving element 228 is identified as channel 1 data. Is possible. In this way, by configuring the multiplexer with a logic circuit, data for each channel can be identified and output to each corresponding channel on the output side. Of course, it is the same even if the level of a channel other than channel 2 is set higher than twice that of the other channels.

  Drive data for driving the rotation side optical elements 131 to 134 is supplied from the drive circuits 116 to 119. Based on the drive data, the elements 131 to 134 emit light and are received by any one of the fixed-side optical elements 221 to 228. The received data is input to the multiplexer 232 via the receiving circuits 2311 to 2318 as described above, and is switched so as to correspond to each channel, and the I / Fs 236 to 239 from each designated output stage. Is output to the outside.

  In the above example, the data of any one of the input data is set to be different from the data level of the other channels to identify the channel, and the arrangement of the fixed-side optical elements 131 to 134 is further determined. From the relationship, each channel recognizes which channel the data is. In addition, the data of each channel can be identified by the data shown in FIG. That is, by inserting data for channel identification at the head of the data of each channel and causing the light emitting elements 131 to 134 to emit light, the fixed-side multiplexer 232 can also identify the data of that channel.

  That is, as shown in FIG. 9, a 2-bit identification code is added to the head of each data of each channel, and the light emitting elements 131 to 134 emit light. Similarly to FIG. 8, light emitted from the light emitting elements 131 to 134 is received by any one of the light receiving elements 221 to 228. The data input to the multiplexer 232 via the receiving circuits 2311 to 2318 identifies which channel the received data is based on this identification code.

  Specifically, as shown in FIG. 9, when the identification code is “00”, the data of the first channel, when “01”, the data of the second channel, when “10”, the data of the third channel, When “11”, the data is added to the beginning of the data as the fourth channel data, and when the identification code is “00”, the multiplexer 232 inputs the output as the first channel data to the I / F 236. Data will be switched. Similarly, the second channel is output to the I / F 237, the third channel is output to the I / F 238, and the fourth channel is output to the I / F 239. This identification code is added to the head of the data for one clock as shown in FIG. Such channel identification codes may be performed by a data processing circuit (not shown) of the fixed side device, or may be added by the drive circuits 116 to 119 of the rotating side electric circuit 11. Further, instead of adding to each data of all channels, any one of a plurality of channels is added, and each channel is identified by the arrangement relationship of the light emitting elements 131 to 136 as in the case of FIG. You may do it. Furthermore, the identification code may be added not at every clock but at every predetermined number of clocks as shown in FIG. 9, or may be added at the head of each frame of video data, for example.

  As described above, when multi-channel data is received on the fixed side by setting the data level to be different only for a certain channel or adding a channel identification code, it is possible to recognize which channel the data is and It is possible to output to the output stage, and it is possible to answer the request for the multi-channel contactless connector 10.

  Next, the rotating connector 10 in which the aperture 30 is provided on the disk of the rotating body 1 will be described. An example of the aperture 30 is shown in FIG. As described above, when a plurality of light emitting elements (rotation-side optical elements) 131 to 134 are provided on the disk of the rotating body 1, depending on the arrangement, for example, light emitted from the light emitting element 131 is received by the light receiving element (fixed). Side light elements) 221 to 228 may be input simultaneously to not the predetermined light receiving elements of the light receiving elements 221 to 228 but the predetermined light receiving elements. At this time, there is a problem of so-called interference between channels, and the electric circuit unit 23 of the fixed body 2 may not be able to identify which channel the received data is. Therefore, the aperture 30 is provided on the disk of the rotating body 1 so that only the predetermined light receiving elements 221 to 228 can receive the light from one light emitting element 131 to 134.

  FIG. 10A is a view of the aperture 30 as viewed from above. A plurality of holes are provided along the circumferences of different radii, and light from the light emitting elements 131 to 134 is output from each hole. This is because the interference between the channels in this case occurs between the light receiving elements 221 to 228 existing in different radial directions.

  FIG. 10B is a perspective view of the aperture 20. The aperture 30 has a certain thickness. However, when the aperture 30 exists between the rotating body 1 and the fixed body 2, the aperture 30 has a thickness that does not hinder the rotation of the rotating body 1. In order to prevent interference between the channels of the light receiving elements 221 to 228, it is also conceivable to provide the holes provided in the aperture 30 continuously rather than discretely. However, in such a configuration, it is necessary to prepare a plurality of apertures 30 of different sizes, and the number of parts increases accordingly, and the configuration of the connector 10 becomes complicated. Therefore, as shown in FIG. 10, the aperture 30 is integrally formed by discretely providing holes.

  FIG. 11 is a diagram for explaining a difference in light rays when the light emitting element 13 is provided on the disk in FIGS. 1 and 6 and when the aperture 30 is not provided. As shown in FIG. 11A, when the aperture 30 is not provided, the light emitted from the light emitting element 13 is received by the three light receiving elements 22 by scattering of the light. A so-called inter-channel interference problem has occurred. On the other hand, when the aperture 30 is provided as shown in FIG. 11B, the light from the light emitting element 13 is scattered, but is reflected by the inner surface of the hole of the aperture 30 and condensed on the light receiving element 22. Therefore, the light from the light emitting element 13 can be reliably received only by the light receiving element 22. Conversely, one light receiving element 22 does not simultaneously receive different lights from the two light emitting elements 13 at the same time.

  The height of the hole of the aperture 30 (thickness of the aperture 30) may be set to the height of the gap between the rotating body 1 and the fixed body 2 so as to reflect all the light from the light emitting element 13. Although it is good, there exists a possibility that rotation of the rotary body 1 may be prevented. Therefore, the height of the hole should be as close as possible to the height of the gap between the rotating body 1 and the fixed body 2.

  Further, the width of the hole of the aperture 30 is such that when the light receiving element 22 is positioned at one end of the hole due to the rotation of the rotating body 1, another light receiving element 22 is positioned at the other end of the hole. Any width is acceptable. This is because one of the light receiving elements 22 continuously receives the light emitted from the light emitting element 13 without interruption while the rotating body 1 rotates.

  At this time, the two light receiving elements 22 simultaneously receive light from one light emitting element 13. However, by selecting either one of the two data received simultaneously by the multiplexer 232 of the fixed body 23, or by configuring a logic circuit that is “OR” of the two received data, The problem of interference between channels will not occur.

  Further, the aperture 30 is provided on the rotating body 1 side in the present embodiment. An example is shown in FIG. While the rotating body 1 rotates, the light emitted from the light emitting element 13 is reflected by the inner surface of the hole of the aperture 30 and can be received by one of the light receiving elements 22 or the two light receiving elements 22 that are in phase. It is.

  In the example described above, the light emitting element 13 is provided on the rotating body 1 side, and the light receiving element 22 is provided on the fixed body 2 side. However, the light receiving element 22 is provided on the rotating body 1 side, and the light emitting element 13 is provided on the fixed body 2 side. But it has the same effect. In this case, a receiving circuit, a multiplexer, and an I / F may be provided in the electric circuit unit 11 on the rotation side, and an I / F and a light emitting element driving circuit may be provided in the electric circuit unit 23 on the fixed side.

  Further, by providing both the light emitting element and the light receiving element in both the rotating body 1 and the fixed body 2, it is possible to exchange data between the rotating body 1 and the fixed body 2 by bidirectional non-contact. In this case, both the rotating side electric circuit unit 11 and the fixed side electric circuit unit 23 are provided with an I / F, a driving circuit, a receiving circuit, a multiplexer, and the like.

It is a side view of the non-contact connector 10 when the rotary body 1 is comprised in disk shape. 3 is a top view of the non-contact connector 10. FIG. It is a figure for demonstrating the electric power supply from the fixed body 2 to the rotary body 1. FIG. It is a side view of non-contact connector 10 when rotating body 1 is constituted cylindrical. It is a perspective view of non-contact connector 10 when rotating body 1 is constituted cylindrical. 1 is a perspective view of a non-contact connector 10 when a plurality of disks of a rotating body 1 are provided. 3 is a configuration diagram of a rotation-side electric circuit unit 11 and a fixed-side electric circuit unit 23. FIG. FIG. 4 is a diagram illustrating an example of data input to a rotation-side electric circuit unit 11. FIG. 4 is a diagram illustrating an example of data input to a rotation-side electric circuit unit 11. 3 is a diagram illustrating an example of an aperture 30. FIG. 3 is a diagram illustrating an example of light rays from a light emitting element 13 to a light receiving element 22. FIG. FIG. 3 is a side view of a non-contact connector when an aperture 30 is provided on the rotating body 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating body 2 Fixed body 4 Rotating shaft 10 Non-contact connector 11 Rotation side electric circuit part 111 I / F
116 drive circuit 12 holding plate 13 rotation side optical element 14 rotation side transformer winding 21 bearing 22 fixed side optical element 23 fixed side electric circuit section 2311 reception circuit 232 multiplexer 236 I / F
24 Fixed transformer winding 30 Aperture

Claims (7)

A rotation-side light element disposed on at least one concentric circles around the Oite the rotary shaft into a disk-shaped rotating body rotating about an axis of rotation,
Wherein said rotation-side light element is arranged in a fixed body and a position facing the fixed-side light element in concentric, it consists of data by non-contact between the rotation-side light element and the fixed-side light element A non-contact connector for transmitting and receiving,
Between the rotating body and the fixed body, provided with an aperture that allows the light emitted from the rotating side optical element or the fixed side optical element to pass through,
The aperture is provided in a disk shape around the rotation axis, and has a plurality of holes that transmit the emitted light on the concentric circles around the rotation axis, and each of the holes along the concentric circles . length, while the light emitting element of the optical element, when the other light receiving element, the length is also located, the light receiving element to the other end of the hole when the light receiving element is positioned at one end of the bore contactless connector, which is a by. The non-contact connector according to claim 1, wherein
Contactless connector the length of the hole provided in the aperture is the length of two of the light emitting elements in the shortest distance is not outputted simultaneously to one of said light receiving element, characterized in that. The non-contact connector according to claim 1, wherein
The non-contact connector according to claim 1, wherein the rotation-side optical element is disposed in a substantially center of the rotating shaft in the rotating body. The non-contact connector according to claim 1, wherein
The rotation-side light element is a plurality arranged in different radii plurality of concentric around the rotation axis, contactless connector, characterized in that. The non-contact connector according to claim 1, wherein
A non-contact connector, wherein a plurality of the rotation side optical elements are arranged along a plurality of radial directions with the rotation axis as a center. The non-contact connector according to claim 1, wherein
Data output from the fixed-side optical element is input, the rotation-side optical element from which the data is input is identified, and the output of the data to correspond to the identified rotation-side optical element A non-contact connector characterized by having switching means for switching between. The non-contact connector according to claim 1, wherein
A non-contact connector characterized in that both the rotating body and the fixed body are provided with transformer windings, and electric power is supplied from the fixed body to the rotating body by the windings in a non-contact manner.

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