VEHICLE APPROACH NOTIFICATION UNIT

• US 20130265150A1
• Filed: 03/18/2013
• Published: 10/10/2013
• Est. Priority Date: 04/05/2012
• Status: Abandoned Application

• Current Assignee: DENSO Corporation, Hamanako Denso Company Limited (DENSO Corporation)
• Original Assignee: Hamanako Denso Company Limited (DENSO Corporation)
• Inventors: NAKAYAMA, Toshiaki, SUZUKI, Koji
• Application Number:
  US13/845,719
• Publication Number:
  US 20130265150A1
• Time in Patent Office: Days
• US Class Current: 340/425.5
• CPC Class Codes: B60Q 5/008 for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching
• CPC Class Codes: H04R 1/30 Combinations of transducers with horns, e.g. with mechanical matching means , i.e. front-loaded hornshorns in general G10K; transducer enclosures or mountings using a back-loaded horn H04R1/2861; application of horns as guiding means to obtain a predetermined directivity characteristic H04R1/345
• CPC Class Codes: H04R 1/345 for loudspeakers
• CPC Class Codes: H04R 23/00 Transducers other than those covered by groups H04R9/00 - H04R21/00 diaphragms for transducers of the distributed-mode type H04R7/045
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles

Abstract

A vehicle approach notification unit is mounted to a sound tube of an electromagnetic warning device producing a warning sound, and includes a dynamic speaker that produces a notification sound notifying a presence of a vehicle. The dynamic speaker is mounted to the sound tube and outputs the notification sound through the sound tube to outside of the vehicle. The sound tube has a warning sound outlet at an end of the sound tube and a through hole at a position different from the warning sound outlet.

Claims

1. A vehicle approach notification unit that is mounted to a sound tube of an electromagnetic warning device producing a warning sound, the vehicle approach notification unit comprising:

a dynamic speaker that produces a notification sound notifying a presence of a vehicle, wherein

the dynamic speaker is mounted to the sound tube and outputs the notification sound through the sound tube to outside of the vehicle, and

the sound tube has a warning sound outlet at an end of the sound tube and a through hole at a position different from the warning sound outlet.

2. The vehicle approach warning unit according to claim 1, wherein

the electromagnetic warning device has a warning sound generator which generates the warning sound, and

the dynamic speaker is different from the warning sound generator.

3. The vehicle approach warning unit according to claim 1,

wherein the dynamic speaker is a piezoelectric speaker which outputs an audible frequency sound.

4. The vehicle approach warning unit according to claim 2, wherein

the sound tube is a spiral-shaped horn, and

the dynamic speaker is located at a position opposite to the warning sound generator.

5. The vehicle approach warning unit according to claim 1, wherein

the dynamic speaker is one of two dynamic speakers,

the vehicle has two electromagnetic warning devices, and the two dynamic speakers are mounted to the two electromagnetic warning devices, respectively, and

the two dynamic speakers output the notification sound having the same frequency from the two electromagnetic warning devices, respectively.

6. A vehicle approach notification unit that is mounted to a sound tube of an electromagnetic warning device producing a warning sound, the vehicle approach notification unit comprising:

a dynamic speaker that produces a notification sound notifying a presence of a vehicle, wherein

the vehicle has two of the electromagnetic warning devices, and the dynamic speaker is mounted to each of the two of the electromagnetic warning devices, and

the dynamic speaker outputs the notification sound having the same frequency from each of the two of the electromagnetic warning devices.

7. The vehicle approach warning unit according to claim 6, wherein

the electromagnetic warning device has a warning sound generator which generates the warning sound, and

the dynamic speaker is different from the warning sound generator.

8. The vehicle approach warning unit according to claim 6,

wherein the dynamic speaker is a piezoelectric speaker which outputs an audible frequency sound.

9. The vehicle approach warning unit according to claim 7, wherein

the sound tube is a spiral-shaped horn, and

the dynamic speaker is located at a position opposite to the warning sound generator.

10. The vehicle approach warning unit according to claim 6,

each of the two of the dynamic speakers outputs the notification sound through the sound tube to outside of the vehicle, and

the sound tube has a warning sound outlet at an end of the sound tube and a through hole at a position different from the warning sound outlet.