On-vehicle sound instrument
First Claim
1. An on-vehicle sound instrument comprising:
- an instrument body fixedly mountable on a vehicle;
a portable face plate detachably mounted on said instrument body;
said face plate including a plurality of operation keys for activating said instrument body in various modes;
said instrument body having all electronic parts for outputting and adjusting sound signals, including switches activated by said operation keys; and
start setting means for placing said instrument body in a startable state only when said face plate is mounted on said instrument body.
1 Assignment
0 Petitions
Accused Products
Abstract
An on-vehicle sound instrument with a face plate which does not require any switch mounted thereon to improve portability is not started unless the face plate is mounted on an instrument body, and even if any switch in the instrument body is manipulated. The face plate (30) detachably mounted on the instrument body (10) does not have any switch mounted thereon and includes operation keys (320). The instrument body (10) includes a microcomputer (40) for controlling sound signal outputs and adjustments and an input unit (44) formed of switches for inputting various data to the microcomputer (40) through inputs from the operation keys (320). When the face plate (30) is removed from the instrument body (10) and, for example, a power switch is turned on, a start setting device (60) prevents the microcomputer (40) from activating. The start setting device (60) includes two switches (62, 64) which are simultaneously turned on when the face plate (30) is dismounted from the instrument body (10). When both switches (62, 64) are in their ON state, the chip enable terminal of the microcomputer (40) becomes low. As a result, the microcomputer (40) is not started to activate the instrument body (10).
34 Citations
24 Claims
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1. An on-vehicle sound instrument comprising:
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an instrument body fixedly mountable on a vehicle; a portable face plate detachably mounted on said instrument body; said face plate including a plurality of operation keys for activating said instrument body in various modes; said instrument body having all electronic parts for outputting and adjusting sound signals, including switches activated by said operation keys; and start setting means for placing said instrument body in a startable state only when said face plate is mounted on said instrument body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An on-vehicle sound instrument comprising:
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an instrument body fixedly mountable on a vehicle; a portable face plate detachably mounted on said instrument body; said instrument body having a first connector including a plurality of terminals disposed in an array; said face plate comprising; a second connector having a plurality of terminals disposed in an array, each of which is connected to a respective one of said terminals in said first connector; a plurality of operation keys for activating said instrument body in various operational modes; a plurality of switches, each of which is activated by a corresponding one of said operation keys; and a circuit board on which said switches are mounted, said circuit board connecting said switches and said second connector; said on-vehicle sound instrument further comprising start setting means for placing said instrument body in a startable state only when said terminals of said first and second connectors are connected to one another at opposite ends of said arrays. - View Dependent Claims (22, 23, 24)
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Specification