Sound producing device for vehicle
| Title: | Sound producing device for vehicle |
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| Patent Number: | 8,615,100 |
| Publication Date: | December 24, 2013 |
| Appl. No: | 13/494127 |
| Application Filed: | June 12, 2012 |
| Abstract: | Sound generated by a sound emitting unit passes through a first sound passage defined between a first shielding board and a shielding cylinder and a second sound passage defined between a second shielding board and the shielding cylinder, and is emitted outside from a sound emitting hole defined in at least one of a case and a cover. The second shielding board and the shielding cylinder shield a space between the sound emitting hole and the first sound passage when the first sound passage is seen from the sound emitting hole. |
| Inventors: | Tsuruta, Makoto (Hekinan, JP); Miyata, Susumu (Anjo, JP); Tsuchiya, Masaru (Toyota, JP) |
| Assignees: | Anden Co., Ltd. (Anjo, JP) |
| Claim: | 1. A sound producing device for a vehicle comprising: a case having a cylindrical part and a separation wall disposed in the cylindrical part to separate inside of the case into a first space and a second space, the separation wall having a through hole through which the first space and the second space communicate with each other, the cylindrical part having an opening open to outside from the second space; a sound emitting unit arranged in the first space to close the through hole; and a cover covering the opening of the cylindrical part, wherein the case has a shielding cylinder arranged in the second space to surround the through hole, the shielding cylinder protruding from the separation wall toward the cover, the cover has a first shielding board arranged in the shielding cylinder to cover the through hole, a first sound passage being defined between the first shielding board and an inner circumference surface of the shielding cylinder, sound generated by the sound emitting unit passing through the first sound passage, and a second shielding board arranged to oppose an opening of the shielding cylinder to cover the first sound passage, a second sound passage being defined between the second shielding board and an axial end of the shielding cylinder, sound coming from the first sound passage passing through the second sound passage, at least one of the cylindrical part of the case and the cover has a sound emitting hole through which sound coming from the second sound passage is emitted outside, and the second shielding board and the shielding cylinder shield a space between the sound emitting hole and the first sound passage when the first sound passage is seen from the sound emitting hole. |
| Claim: | 2. The sound producing device according to claim 1 , wherein the sound emitting hole is located at the lowest position in the second space. |
| Claim: | 3. The sound producing device according to claim 1 , wherein the sound emitting hole is one of a plurality of sound emitting holes, the cylindrical part of the case has a first sound emitting hole corresponding to the sound emitting hole, and the cover has a second sound emitting hole corresponding to the sound emitting hole. |
| Claim: | 4. The sound producing device according to claim 1 , wherein the axial end of the shielding cylinder opposes to the cover and extends to a point between the first shielding board and the cover, and the whole of the first shielding board is received inside of the shielding cylinder to produce a difference of level between the axial end of the shielding cylinder and a surface of the first shielding board relative to the second shielding board in an axis direction of the shielding cylinder. |
| Claim: | 5. The sound producing device according to claim 1 , wherein the first shielding board has a diameter smaller than a diameter of the second shielding board. |
| Current U.S. Class: | 381/389 |
| Patent References Cited: | 4720867 January 1988 Imai et al. 4860367 August 1989 Hook 4876723 October 1989 Fang 5637840 June 1997 Kim 2004/0062407 April 2004 Ziegler et al. 2008/0037818 February 2008 Ierfone et al. 2013/0187523 July 2013 Miyata et al. 2013/0189918 July 2013 Miyata et al. 2013/0223656 August 2013 Iuchi A-2004-229340 August 2004 A-2006-101287 April 2006 |
| Assistant Examiner: | Kaufman, Joshua |
| Primary Examiner: | Kuntz, Curtis |
| Attorney, Agent or Firm: | Posz Law Group, PLC |
| Accession Number: | edspgr.08615100 |
| Database: | USPTO Patent Grants |
| Language: | English |
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