# US 9,435,926 B2 · Light guide body, relay apparatus, and speaker apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,926 B2 - Document ID: US9435926B2 - Status: Granted - Kind: B2 - Application number: 14/424,465 - Filed: 2013-08-16 - Published: 2015-07-30 - Granted: 2016-09-06 - Earliest claimed: 2012-08-30 - Assignees: Yamaha Corporation - Applicants: Yamaha Corporation - Inventors: Masaki Yamamoto; Yoshiaki Kawaida; Koji Suzuki - Web page: https://patentgrep.com/patent/US9435926B2 ## CPC - G02B 6/0008: {the light being emitted at the end of the fibre} - G02B 6/00: Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings - G02B 6/0046: {Tapered light guide, e.g. wedge-shaped light guide} - G08C 23/04: using light waves, e.g. infrared - H04B 10/29: Repeaters - H04N 5/00: Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) - H04N 5/642: {Disposition of sound reproducers} - H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom - H04R 1/02: Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075}) - H04R 1/028: {associated with devices performing functions other than acoustics, e.g. electric candles} - H04R 1/403: {loud-speakers} - G02B 6/0018: {Redirecting means on the surface of the light guide} - G02B 6/002: {by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces} - G02B 6/0088: {of the light guide or other optical sheets in the package} - G02B 6/102: {for infrared and ultraviolet radiation} - G08C 2201/40: Remote control systems using repeaters, converters, gateways - H04N 5/60: for the sound signals - H04N 5/64: Constructional details of receivers, e.g. cabinets or dust covers (furniture aspects {of television cabinets} A47B81/06) - H04N 5/66: Transforming electric information into light information (scanning details H04N3/00) - H04R 2420/07: Applications of wireless loudspeakers or wireless microphones - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G08C: TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmitting systems F15B; mechanical means for transferring the output of a sensing member into a different variable G01D5/00; mechanical control systems G05G) - H04B: TRANSMISSION - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract In the vicinity of the outgoing-side end portion 202 of a light guide rod 20, the rear face thereof is formed into an inclined face 23 being inclined in a tapered shape toward the side face. The infrared ray having advanced toward the flat face of the outgoing-side end portion 202 is reflected by the inclined face 23. The infrared ray reflected by the inclined face 23 is refracted by the side face of the light guide rod 20 and irradiated, thereby being irradiated while being expanded toward the outgoing-side end portion 202. Hence, a bar speaker 1 can irradiate the infrared ray in a wide range beyond the width of the housing 10 thereof. ## Claims ### Claim 1 A relay apparatus comprising: a housing; a light signal receiving unit, provided on a first face of the housing, and receiving a light signal from an outside of the housing; a light emitting unit emitting light depending on the light signal received by the light signal receiving unit, and a light guide body including a long light guide portion, the light guide body comprising: an incident portion which is provided at a first end portion in a longitudinal direction of the light guide portion, and through which light enters; a first outgoing portion which is adapted to irradiate the light guided by the light guide portion from a first portion provided along the longitudinal direction to an outside; and a second outgoing portion which is provided at a second end portion in the longitudinal direction of the light guide portion, and which is adapted to irradiate the light to be guided toward the second end portion to the first portion, wherein the light guide body is provided on a second face different from the first face of the housing, and the light emitted by the light emitting unit enters the incident portion. ### Claim 2 (depends on 1) The relay apparatus according to claim 1, wherein a second portion of the light guide portion which is provided with the second outgoing portion and located on an opposite side of the first portion is inclined in a tapered shape toward the first portion. ### Claim 3 (depends on 2) The relay apparatus according to claim 2, wherein the second portion which is located on the opposite side of the first portion is further inclined in a tapered shape in a direction different from a direction toward the first portion. ### Claim 4 (depends on 1) The relay apparatus according to claim 1, wherein the light guide portion includes a bent portion that is formed by bending the first end portion, and the bent portion is provided with an inclined face on the first portion. ### Claim 5 (depends on 1) The relay apparatus according to claim 1, wherein the first outgoing portion is provided with a reflection portion that is formed so that a density thereof is made higher as going farther from an incident position of the light in the longitudinal direction. ### Claim 6 (depends on 1) A speaker apparatus comprising: the relay apparatus according to claim 1; a sound signal receiving unit receiving a sound signal from an outside, and a sound outputting unit outputting the sound signal received by the sound signal receiving unit as sound.