JPS62146448A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain a tape recorder functions only in a sound-recording state and a timer operation state independently of a timer-off signal until the end of a using tape by simple constitution consisting of a timer, a switch circuit and a mechanism control device. CONSTITUTION:When the timer 4 is turned to an operating state by turning off a power supply switch S1, a signal (a) is outputted only for a set time T1, a TR Q2 is turned on and a TR Q1 is also turned on, so that electric power E is supplied to an apparatus to drive the apparatus. When the timer 4 is turned on in the state that the mechanism 2 is set up to the sound-recording state of a signal received by a tunner 1, a signal (b) is outputted from the mechanism control device 3 to which the electric power E is supplied, applied to the base of the element Q2 and held for a time T2 until the end of the loaded tape is detected and the mechanism 2 is stopped. Thereby, the driving of the mechanism 2 is held up to the end of the tape independently of the period T1 of the output signal (a) after turning on the timer in the sound-recording state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder having a recording function with a timer.

Conventional technology A conventional tape recorder, which is a device with a clock and has a timer function, simply operates the power supply for a predetermined time based on the output from the timer, and is independent of the mode of the device.

Therefore, whether in playback mode or recording mode,
It operated by turning on the power at a certain set time, and only operated for the time set by the timer.

Problems to be Solved by the Invention However, in the case of devices that normally use a battery, the time from when the timer is turned on until it is turned off is set to a relatively short time in consideration of battery life and other factors. When receiving radio or playing tape, a short time is sufficient for purposes such as alarming, but
Air chairs and standby stations are often unattended when the timer is on for recording, etc., and when the timer is set to operate for a short fixed period of time, it may turn off midway through the tape.

The present invention solves these problems, and has a simple configuration that allows only when recording and timer operation is performed.
To provide a cheap recorder which can operate independently of a timer off signal until the end of the tape being used is reached.

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention has the following features:
After energizing the power supply when the timer is on, a control device is provided that detects when the mechanism is set to the recording state and outputs a control signal, and the output causes the mechanism to stop switching the power supply at the end of the tape. The control output is maintained in the energized state until the control output is stopped.

Effect of the Invention With the above-described configuration, the present invention allows the switching circuit of the power source to remain on even if the output from the timer is turned off by a control signal indicating the recording state from the mechanism side.

Embodiment Hereinafter, a tape recorder with a radio according to an embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a tuner amplifier section including a radio tuner and an amplifier, 2 is a tape deck mechanism input section, and 3 is a mechanism control device.The mechanism 2 has a function of recording signals received by the tuner amplifier 1. Reference numeral 4 denotes a timer provided in the clock 6, which outputs an output signal a that is turned on at a preset time and then turned off for a certain period of time T1. E is a power supply that is supplied to the equipment side by turning the power switch S1 on and off. Ql is a switching transistor connected in parallel with the power switch S1, and is controlled by a switching transistor Q2 connected to its base side. At the base of the transistor Q2, - the output a of the timer 4 is connected to the diode D and the resistor R1.
supplied through. Therefore, when the power switch S1 is off and the timer 4 is put into operation, this timer 4
outputs the output signal a at the set time and connects the diode D1.
Since the transistor Q2 is made conductive through the resistor R1 and the base of the transistor Q1 is grounded through the resistor R2, the transistor Ql is turned on and the power source E is supplied to the equipment. This state lasts for a certain period of time T1 set by the timer 4. Therefore, during that time, the device will operate in the mode set before the timer 4 was turned on.

Here, when the mechanism section 2 is set to record the received signal of the tuner section 1, the mechanism control device 3 is supplied with the power E by turning on the timer 4.
outputs an output signal S, which is supplied to the base of transistor Q2 through diode D2. This output signal is maintained until the end of the tape mounted on the mechanism section 2 in the recording state is detected and the mechanism section 2 stops, that is, for a time T2. Therefore, for example,
Even if the output of the output signal color is turned off, the transistor Q2 can be kept in the on state by the output signal S. Therefore, the recording state is maintained during the period of the output signal color T1 after being turned on by the timer 4.
Regardless of the output signal, it is sustained up to 2 until the output signal is turned off, that is, until the end of the tape. However, the time T2 until the end of the tape is one hour T! If it is shorter, even if the mechanism 2 stops, the radio chainer will continue to be in the on state for the time period T1 of the timer.

FIG. 2 shows the relationship between the output signals a and b. Here, the timer output signal time Tl is usually 0.5 to 1 hour from the conventional purpose of timer equipped equipment. On the other hand, the output signal time T2 to the end of the tape is not constant, ranging from 16 minutes for a short recording tape to 120 minutes or 180 minutes for a long recording tape.

Effects of the Invention As described above, in the present invention, the switching circuit that switches the power supply on and off using a timer is configured to remain on until the end of the tape in the recording state is detected, regardless of the timer. When the recording time of the tape is longer than one hour, the timer operates until the end of the tape and shuts off the power at the end, making it possible to record a long program without interruption. Furthermore, the structure is very simple and inexpensive, making it an extremely effective invention.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a tape recorder according to an embodiment of the present invention, and FIG. 2 is a signal characteristic diagram thereof. 1... Cheena amplifier section, 2... Tape deck mechanism section, 3... Mechanism control device,
4... Timer %Q1+Q2... Switching transistor, E... Power supply, a...
...Timer output signal, b...Control output signal. Name of agent: Patent attorney Toshi Nakao (1 name, 2)
Figure τ

Claims (1)

[Claims] A timer that outputs a signal that turns on at a preset time and turns off again after a certain period of time; a switching circuit that switches between energizing and cutting off the power supply according to the output of this timer; and a mechanism control device that outputs a signal that keeps the switching circuit on until the end of the tape is detected when the mechanism is in the recording state, and when recording on a tape for a longer period of time than the fixed time set in the timer. A tape recorder characterized in that the switching circuit is configured to be turned off regardless of the timer output.