JPH0298210A - On-vehicle receiver - Google Patents

Abstract

PURPOSE:To improve the operability by instructing plural functions to a channel selection switch depending on the difference from a depressing time in an on- vehicle receiver in which the change of the tuning frequency of a tuner is instructed by a single channel selection switch. CONSTITUTION:A radio wave acquired by an antenna 1 is sent to a tuner 2 and an optional radio wave of a broadcast station is selectively tuned, that is, received by the tuner 2. The tuning frequency (f) of the tuner 2 when the channel selection switch 6 is depressed within a prescribed time is changed by a prescribed unit and when the switch is depressed in excess of the prescribed time, the tuning frequency (f) is selected fast automatically till the frequency is tuned to a broadcast station with a prescribed electric field strength, so-called automatic mode. The tuning frequency (f) is changed at a speed slower than after the release of depression during the depression of the switch 6 and the channel selection tuning as above is controlled by using a channel selection controller 7 provided with a depression detector 71 and a time detector 72. Since the channel selection switch 6 instructs plural functions such as change in unit quantity, slow selection and automatic channel selection depending on the time of the depression, the operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle-mounted receiver, and more particularly to control of tuning operation of a tuner constituting the vehicle-mounted receiver.

[Prior Art and Invention Solution Layer WJ] Regarding electronically tuned car radios, Utility Model Application No. 60-1
There is something like the one disclosed in Japanese Patent No. 11142, and generally there is a manual tuning switch that manually increases or decreases the tuning frequency by a predetermined amount, and a manual tuning switch that automatically changes the tuning frequency (( The system is equipped with an automatic tuning switch such as a so-called 5EEK switch or SCAM switch that fast-forwards (by a predetermined amount), thereby tuning to the desired broadcasting station, taking into consideration operability when the vehicle is running. It has become.

However, these vehicle radios are often installed in a limited space in the vehicle such as the dash panel, so although many functions such as the manual and automatic tuning switches mentioned above are desired, the various switches on the panel surface are There was a desire to reduce the size and make it as compact as possible, which created conflicting issues.

Furthermore, if a large number of operation switches for a variety of functions are arranged on the panel surface, the operation becomes complicated, and there are also disadvantages such as the possibility of pressing the wrong switch.

CObject of the Invention The present invention has been made in view of the above-mentioned background, and an object of the present invention is to provide an in-vehicle receiving device that is compact and has good operability in tuning tuning, and can reduce the space on the panel surface. Have a purpose.

[Structure of the Invention] In order to achieve the above object, an in-vehicle receiver according to the present invention is an in-vehicle receiver that instructs to change the tuning frequency of a tuner using a single tuning switch, and wherein the tuning switch is pressed within a predetermined time. When pressed, the tuning frequency is changed by a predetermined unit amount, and when pressed for more than a predetermined time, the tuning frequency is automatically fast-forwarded until the tuning frequency is tuned to a broadcasting station with a predetermined field strength. In addition, while the tuning switch is being pressed, the tuning control means is configured to change the tuned frequency at a slower speed than after the pressing is released.

With the above configuration, the channel selection switch instructs multiple functions depending on the difference in suppression time.
In addition to improving operability, the single channel selection switch allows for a compact panel layout. Further, while the tuning switch is pressed in the auto mode, the tuning frequency is changed at a slow speed, so visual confirmation is possible.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a preferred embodiment of a vehicle-mounted receiver according to the present invention.

In the figure, l is an antenna, 2 is an AM/FM two-band tuner, 3 is an amplifier, 4 is a speaker, 5 is a display that displays the tuning frequency af of tuner 2, and 6 is an instruction to change the tuning frequency f of tuner 2. The channel selection switch F is a channel selection controller as a channel selection control means of the present invention.

The radio waves captured by the antenna 1 are sent to the tuner 2, and the tuner 2 selectively tunes to, that is, receives radio waves from any broadcast station. At this time, the tuning frequency f is displayed on the display 5 connected to the tuner 2. This received signal is sent from the tuner 2 to the amplifier 3, and becomes audible at the speaker 4 connected to the amplifier 3.

In the tuner 2, the tuning switch 6 is connected to the tuning controller 7.
The tuning switch 6 instructs the tuner 2 to tune the tuning.

That is, in the tuner 2, when the 1-tuning switch 6 is pressed within a predetermined time, the tuning frequency f is set to a predetermined unit amount (in this embodiment, FM is set to 0.1 allf and AM is set to 9 KH!). ), and if the button is pressed for more than a predetermined time, the tuning frequency f will be automatically fast-forwarded until it is tuned to a broadcasting station with a predetermined electric field strength. In the middle, the tuning frequency f is changed at a slower speed after the pressure is released, and such tuning is performed by the pressure detection 71 and the time detection 7.
The operation is controlled by a channel selection controller 7 having a channel selection controller 2.

Note that FIG. 2 is a front view of the panel of the in-vehicle receiver shown in FIG. 1, and the tuning switch 6 is a seesaw with one end on the up side of the tuned frequency f and the other end on the down side, as shown in the same figure. It's a switch.

The tuning controller 7 is constituted by a so-called microcomputer, and controls the operation of each part of the in-vehicle receiving device, such as the tuner 2 and the display 5, according to a predetermined control program.

3 and 4 show the operation of the tuner 2 and display 5 in a predetermined control program of the tuning controller 7.
3 is a flowchart schematically showing a portion (subroutine) related to M control.

Further, FIG. 5 is a timing diagram illustrating the control operation of the channel selection controller according to the flowcharts shown in FIGS. 3 and 4.

The control operation according to the subroutine shown in the figure will be explained below.

When this subroutine is started, the current tuning frequency f of the chainer 2 is read into the tuning controller 7 in process (2), and it is displayed on the display 5.
In process (2), it is determined whether the channel selection switch 6 has been pressed. Here, if the channel selection switch 6 is pressed,
The process proceeds to process (2), in which the tuning frequency f is changed by a predetermined unit amount, and in the next process (2), the tuned frequency f after the change is displayed on the display 5, and the process proceeds to the next process (2).

On the other hand, if the channel selection switch 6 is not pressed, the process
is in roof operation and waits for suppression of the channel selection switch 6.

Process (2) suspends execution of the subroutine for a predetermined time T. In other words, after time T has elapsed, proceed to the next process ■,
In the process (2), it is determined whether the channel selection switch 6 is still pressed.

If the channel selection switch 6 is released within the predetermined time T as shown on the left side of FIG. 5, the process returns to the main control program and the subroutine ends.

On the other hand, if the channel selection switch 6 is still pressed for more than the predetermined time T as shown on the right side of FIG. 5, the program jumps further to the automote subroutine shown in FIG.

The auto mode subroutine first determines in process (2) whether or not the channel selection switch 6 is still pressed. Here, if the press of the 1st station selection switch 6 is read, 1
Proceeding to the next process O, the tuning frequency f is changed by a predetermined unit amount in the process (2), the tuned frequency f after the change is displayed on the display 5 in the next process (2), and the next process [Stock ] Proceed to.

Processing 2 stops the execution of the subroutine for a predetermined time TI, and after time T has elapsed in processing 1, the process returns to process 3 again. In other words, if the 1-tuning switch 6 is kept pressed for a predetermined time T, the tuning controller 7 performs a so-called slow feed control operation in which the tuning frequency f is changed at a slow repetition rate, as shown on the right side of FIG. becomes.

This slow feed control operation is completed by determining whether the channel selection switch 6 has been pressed in process (2), exiting the process (2), and proceeding to process (2).

Process O changes the tuning frequency f by a predetermined unit amount.

Then, in the first process @, the tuned frequency f after the above change is displayed on the display 5, and the process proceeds to the next process O.

Process O reads the electric field strength of the tuned reception wave, and the electric field strength is compared with a predetermined value d (field strength value) set in advance in the next process [phase].

In other words, the process [phase] constitutes a loop in which, if the electric field strength is smaller than a predetermined value d, it is determined that the electric field strength of the received wave is too weak and returns to process It is determined that the reception strength is sufficient, the process returns to the main control program, and the processing in this subroutine ends.

Therefore, after slow feed control is performed by continuing to suppress the tuning switch 6, if the pressure is released, the processing loops with @00 and tunes to the broadcasting station with a predetermined value d as shown on the right side of Figure 5. Auto tuning is executed in which the tuning frequency f is automatically fast-forwarded until the point is reached.

The subroutine shown in FIGS. 3 and 4 is a processing procedure in which the tuning frequency f is incremented every predetermined unit amount. Of course, this is an example of suppressing the up side of the tuning switch 6, so in the case of pressing down on the down side, the tuning frequency f is counted down by another subroutine having the same procedure.

That is, according to such a configuration, the channel selection switch 6 can change the unit amount, slow feed, or
Since it indicates automatic tuning and multiple functions, it improves operability, and since it uses a single tuning switch, it allows for a compact panel layout, reducing panel space and increasing design freedom.

Further, while the tuning switch 6 is pressed in the auto mode, the tuning frequency f is changed at a slow speed (slow feeding), so the frequency display on the display 5 can be visually confirmed. This makes it possible to prevent over-sending of frequencies, etc., and enables efficient and reliable channel selection operations.

[Effects of the Invention] As explained above, according to the present invention, since the tuning switch instructs multiple functions depending on the difference in suppression time, operability can be improved and a single tuning switch can be used. Therefore, a compact panel layout is possible, reducing panel space and increasing design freedom.

Further, while the tuning switch is pressed in the auto mode, the tuning frequency is changed at a slow speed, so over-feeding of one frequency, etc. can be prevented, and an efficient and reliable tuning operation can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a preferred embodiment of the in-vehicle receiver according to the present invention, FIG. 2 is a front view of the panel of the in-vehicle receiver shown in FIG. 1, and FIGS. 3 and 4 are selected. A flowchart schematically showing a part (subroutine) related to operation control of the tuner 2s and display 5 in a predetermined SIS program of the station controller. FIG. 3 is a timing diagram illustrating control operation. ! ... Tuner 6 ... Tuning switch 7 ... Tuning controller (tuning control means) 71 - ...
Pressure detection 72 - Time detection f... Tuning frequency Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] A vehicle-mounted receiving device that instructs to change the tuning frequency of a tuner using a single tuning switch, and when the tuning switch is pressed within a predetermined time, the tuning frequency is changed by a predetermined unit amount, and the tuning frequency is changed by a predetermined amount. If the switch is pressed beyond the specified field strength, the tuning frequency will be automatically fast-forwarded until the tuning switch is tuned to a station with a predetermined electric field strength. An on-vehicle receiving device characterized by comprising a tuning control means for changing a tuning frequency.