JPH01160119A - Remote controller - Google Patents

Abstract

PURPOSE:To attain thin profile by forming a linear pattern nearly as a loop to the surrounding part of a printed circuit board so as to form an antenna thereby eliminating the need for a coil. CONSTITUTION:A microcomputer 4, an oscillation circuit 5 and switches 2a-1c or the like are mounted on one printed circuit board 1, an inductor being the component of the oscillation circuit 5 is formed as chip components (chip inductance) 5a, 5b and a linear pattern is formed nearly as a loop around the printed circuit board 1 to form the antenna 6. That is, the linear pattern 6 formed nearly as a loop around the printed circuit board 1 forms an antenna and one terminal is connected to one terminal of the chip inductance 5b of the oscillation circuit 5 via a capacitor 7 and the antenna radiates a radio wave modulated by the oscillation circuit 5. Thus, no coil is required and thin profile is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a remote control device, and particularly to a remote control device that outputs an external signal using radio waves.

<Prior Art> A remote control device (referred to as a remote control device) modulates a code corresponding to an operated key with a high frequency signal and outputs it to the outside via radio waves or infrared rays. Among these, remote control devices that output radio waves to the outside are used for remote control in many devices.For example, they are used to activate or deactivate the anti-theft system installed in a car. There is. In other words, after locking the car door, the anti-theft system is activated from the outside using a remote control device, and when the door is opened, the trunk is opened, or vibration is applied, the anti-theft system activates, e.g., when a siren is activated. ring to prevent theft. When the authorized driver is driving the vehicle, the anti-theft system is deactivated using the remote control device, the door is opened, and the vehicle starts driving.

Now, as shown in FIG. 3, such a radio wave output type remote control device includes a switch unit 11 provided with various switches, a code ROM 12 that stores ID codes unique to the vehicle and codes corresponding to each switch. A control circuit (for example, a microcomputer) 13 that outputs a code or ID code according to a pressed key, and an oscillation unit 14 that oscillates at a predetermined high frequency and modulates the code output from the microcomputer and outputs the modulated code.
It has an antenna 15 that radiates the modulated signal output from the oscillation part as a radio wave, and these are mounted on one printed board,
It is housed in a small case and is portable.

By the way, as shown in FIG. 4, the inductance L31 of the conventional oscillation section 14 is formed using a coil winding, and also serves as an antenna.

<Problems to be Solved by the Invention> As described above, in the past, since the inductance was a coil and also served as an antenna, there was a problem that the diameter could not be reduced and the remote control device could not be made thinner.

Furthermore, when the conventional oscillator is squeezed by hand, the frequency deviation is as high as 1 MHz due to the influence of the human body, which is not desirable for a portable remote control device and can cause malfunctions.

In light of the above, an object of the present invention is to provide a radio wave output type remote control device that can be made thinner and can reduce frequency fluctuations.

Means for Solving Problems> FIG. 1 is an explanatory diagram of a printed board of a remote control device of the present invention.

1 is a printed board, 2a to 2C are remote control switches, 3
The code RO is removably provided on the back of the printed board.
M, 4 is a control microcomputer, 5 is an oscillation circuit, 5a to 5b
is the chip inductance.

6 is an antenna.

Function> The microcomputer 4, the oscillation circuit 5, the switches 2a to 20, etc. are mounted on one printed board 1, and the inductances constituting the oscillation circuit 5 are chip components (chip inductances) 5a and 5b, and the printed board 1 An antenna 6 is formed by forming a linear pattern in a substantially loop shape around the periphery of the antenna.

<Example> Fig. 1 is an explanatory diagram of a printed circuit board of a remote control device according to the present invention, Fig. 2 is an oscillation circuit diagram applicable to the present invention, and the remote control circuit has the same configuration as Fig. 3. .

In Fig. 1, 1 is a printed board with wiring patterns formed on both the front and back sides, 2a to 2C are remote control switches,
3 is a cord R that is removably installed on the back of the printed board.
It is an OM and stores an ID code unique to the vehicle and codes corresponding to each switch. 4 is a control microcomputer (IC) that reads data stored in the code ROM and outputs a code or ID code corresponding to the pressed switch.

5 is an oscillation circuit that oscillates at a predetermined high frequency, modulates and outputs the code output from the microcomputer 4, and has a Colpitts type configuration as shown in Figure 2! It has an inductance of 5m and 5b. This inductance 5a, 5
As shown in FIG. 1, b is composed of an i-tube component (chip inductance) and mounted on the printed board 1.

Reference numeral 6 denotes a linear pattern formed in a substantially loop shape around the periphery of the printed board 1, which constitutes an antenna, and one end of which is connected to the chip inductance 5b of the oscillation circuit 5 via a capacitor 7.
is connected to one end of the oscillation circuit 5, and emits radio waves modulated by the oscillation circuit 5. 8 is a crystal oscillator for system clock.

Incidentally, various other parts (not shown) are mounted on both sides of the printed board 1 to constitute a remote control circuit. and,
A printed board 1 on which various parts are mounted is housed in a case provided with a switch operation member, thereby forming a portable remote control device.

<Effects of the Invention> According to the present invention, a microcomputer, an oscillation circuit, a switch, etc. are mounted on a single printed board, and the inductance constituting the oscillation circuit is a chip component, and a substantially loop is formed around the periphery of the printed board. Since the antenna is made by forming a linear pattern in the shape of a shape, there is no need to use a coil, so it is possible to make the antenna thinner, and the frequency change r# caused by the human body can be reduced to 10.
0 KHz FIG. 1 is an explanatory diagram of a printed circuit board of a remote control device of the present invention, FIG. 2 is an oscillation circuit applicable to the present invention, FIG. 3 is a block diagram of a remote control circuit, and FIG. 4 is a conventional oscillation circuit.

1. Printed board, 28~2C...remote control switch, 3. Code ROM.

4...Microcomputer, 5...Oscillation circuit, 5a-5b...Chip inductance, 6...Antenna Patent applicant Alpine Corporation Representative Patent attorney Chiki Saito Figure 2

Claims (1)

[Claims] In a remote control device that modulates a code or ID code, etc. corresponding to a switch at a predetermined oscillation frequency and outputs it to the outside as a radio wave, a microcomputer, an oscillation circuit, a switch, etc. are mounted on a single printed board. A remote control device characterized in that the inductance constituting the oscillation circuit is a chip component, and a linear pattern is formed in a substantially loop shape around the periphery of a printed board to serve as an antenna.