JPH04212751A - Cassette system tape recorder - Google Patents

Abstract

PURPOSE:To eliminate the need of an ejecting operation and to improve operability by allowing a timer means to output an ejecting signal and automatically ejecting a cassette when the playback of the tape is not started in a specified time. CONSTITUTION:In the case of detecting that a 1st switch 1 is in a make-state in a state where a cassette main body is inserted in a cassette holder, a microcomputer 3 sets the timer means to start counting time. When a 2nd switch 2 for detecting the traveling of a magnetic tape is not turned on even when the specified time or longer than that time elapses after the switch 1 is turned on, the computer 3 outputs the ejecting signal and the cassette is ejected. When the cassette is not normally set or when abnormality occurs in a mechanism, the effect is easily recognized.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette tape recorder.

0002

[Prior Art] In conventional tape recorders, when inserting a cassette body containing a magnetic tape into a cassette holder, it is sucked mechanically or using a motor, etc.
When ejecting a cassette tape, some types detect the end of the magnetic tape and automatically eject it by electrical means.

0003

However, whether or not the tape recorder is in the playing state cannot be confirmed unless it is checked whether the magnetic tape is running or whether playback sound is being produced. Note that there are two possible reasons why the tape recorder does not enter the play state.

- When the cassette body is set normally, but it is not. - When an abnormality occurs in the tape recorder mechanism. When the cassette body is not properly set, the sound of the magnetic tape running or playing A normal play state can be obtained by confirming that the cassette tape is not in the play state, ejecting the cassette tape, and then setting the cassette tape normally again. Furthermore, even if there is an abnormality in the tape recorder mechanism, it may return to normal play mode if the tape recorder is ejected and then set to play mode again.

[0005] As described above, in conventional cassette tape recorders, it is necessary to check the running of the magnetic tape or the playback sound, and if it is not in the playing state, to perform the eject operation and then set it again in the playing state. However, such operations are extremely troublesome.

[0006] The present invention solves the above-mentioned problems by detecting insertion of a cassette tape into a cassette holder and automatically ejecting the cassette tape if the tape recorder is not set to play within a certain period of time. The purpose of the present invention is to provide a cassette-type tape recorder with the following features.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the cassette type tape recorder of the present invention automatically plays the tape by moving the cassette body inserted into the cassette holder and setting it in a playing state. an eject means for detecting an eject signal and ejecting the cassette body; and an eject means for detecting that the cassette body is inserted into the cassette holder, starts timing, and continues the above-mentioned timing when the start of running of the magnetic tape is detected. A timer means for stopping the ejection is provided, and a signal for detecting the elapse of a specified time from the timer means is used as the eject signal.

[0008]

[Operation] When inserting the cassette body into the cassette holder,
The inserted cassette body is moved by the cassette holder and set to the play state, and tape playback is automatically started. At this time, a timer measures the time from the insertion of the cassette body to the start of running of the magnetic tape, and if an abnormality occurs in the mechanism of the tape player and the tape does not start running within a predetermined time, the timer means indicates that the specified time has elapsed. The detection signal is input to the ejecting means as an eject signal, and the cassette body is automatically ejected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a first switch that detects that a cassette body (not shown) containing a magnetic tape is inserted into a cassette holder. When the cassette is inserted, the movement of the cassette detection arm that comes into contact with the inserted cassette body is detected, and the cassette enters the make state.

Reference numeral 2 denotes a second switch which is turned on or off by detecting the running of the magnetic tape, and enters the make state only when the magnetic tape is in the running state. An example of such a switch is a switch for detecting the end of a magnetic tape.

Reference numeral 3 denotes a microcomputer that outputs an eject signal A according to the states of the first and second switches 1 and 2, and input ports I and II are connected to resistors R1 and R1, respectively.
It is connected to the logic level "L" via R2 and to the logic level "H" via the first switch 1 and the second switch 2, and the eject signal A is appropriately generated at the output port III.

Although not shown in the drawings, this cassette tape recorder has means for automatically starting tape play when the cassette is set in the play state, and means for generating an eject signal in response to a manual eject instruction. Eject means is provided for detecting and automatically moving the cassette holder to a position where the cassette body can be attached or detached, and here, the logical sum of the eject instruction generated by manual operation and the eject signal A is ejected. It is connected to the means as an eject instruction input.

FIG. 2 is a waveform diagram of the main part of FIG. 1. (a) shows the waveform of input port I, and time t1 shows the timing when the first switch 1 is reversed to the make state. (B)
(B') represents the case where the second switch 2 is reversed to the make state and the case where it is not reversed, respectively, and time t2 represents the timing when the second switch 2 is reversed to the make state. (C) is the output port III in the case of (B') in Figure 2.
, and time T is a specified time determined by the program of the microcomputer 3.

The microcomputer 3 and FIG. 2 will be explained in detail based on the flowchart of FIG. First, the microcomputer 3 monitors the input port I and checks whether the cassette body is inserted into the cassette holder based on the state of the first switch 1 [a-1], and if the first switch 1 is in the make state. When it is detected that the cassette body has been inserted into the cassette holder, the timer means is then set [a-2] to start timing [a-3], and then [a-
Check [a-4] whether the time measurement content of the timer means set in step 2 has reached the specified time T shown in FIG.
In [a-4], it is determined that the specified time T has not been reached, and then the second input port II is monitored and the second
Check the status of switch 2 [a-5], and check the status of switch 2 at time t3.
In this case, it is determined in [a-5] that the second switch 2 is off, the process returns to [a-4], and the contents of the timer means are checked again in [a-4]. If the second switch 2 is reversed to the make state at time t2 within the specified time T from time t1 as shown in FIG. 2(b), [a-5]
When it is determined that the second switch is on in [a-3], the timer means that started timing in [a-3] is put into standby state [a-6], and the timer means returns to the state before [a-3], or is interrupted at the time when it moves to [a-6]. If the second switch 2 does not switch to the make state from time t1 to the specified time T as shown in Fig. 2 (B') [if it does not enter the play state], the specified time T has elapsed in [a-4]. It is determined that the output port III is
Invert the logic level to “H” as shown in c) [a-7]
. Therefore, in the case of FIG. 2 (b'), the output port II
Ejection is automatically activated by the output eject signal.

With this structure, when the cassette body inserted into the cassette holder is set to the playing state and tape playback is automatically started, the running of the magnetic tape is detected by the second switch 2. The timer means 3 measures the time from when the first switch 1 is turned on to when the second switch 2 is turned on. If this time is shorter than the specified time, the microcomputer 3 issues an eject signal. is not output.

However, the time t when the cassette body was inserted
If the tape is moved with the cassette holder and set to play within the specified time T from 1, and the tape does not start playing automatically, that is, if an abnormality occurs in the tape player mechanism, the will be ejected, and the operator will be prompted to perform the insertion operation again.

Therefore, when the cassette body is not properly set in the cassette holder or when an abnormality occurs in the mechanism, this can be recognized without taking the trouble of checking the running state of the magnetic tape or the playback sound. Further, in such a case, since the eject is automatically applied, there is no need for the operator to perform the eject operation himself when setting the play state again, and operability is greatly improved. In this embodiment, the timer means is configured by the microcomputer 3, but it may be configured by hard logic or another configuration as well.

[0018]

As described above, according to the present invention, if an abnormality occurs in the mechanism of the tape player and tape playing does not start automatically within a specified time, an eject signal is output by the timer means. , the cassette body is automatically ejected and the operator is prompted to reinsert it, so if the cassette body is not properly set in the cassette holder or if a mechanical error occurs, it is necessary to remove the magnetic tape. This can be recognized without checking the driving condition or the playback sound.

[Brief explanation of the drawing]

FIG. 1 is an eject signal generation circuit diagram of a cassette tape recorder according to an embodiment of the present invention.

FIG. 2 is a waveform diagram of the main part of FIG. 1 in the same embodiment.

FIG. 3 is a flowchart of the main part of FIG. 1 in the same embodiment.

[Explanation of symbols]

1 First switch 2
second switch 3
Microcomputer (timer means) A
Eject signal R1, R2
Resistors I, II Input port III Output port T
Regulation time

Claims (1)

[Claims] Claim 1: A means for moving a cassette body inserted into a cassette holder and setting it in a play state to automatically play a tape; an eject means for detecting an eject signal and ejecting the cassette body; A timer means is provided, which starts timing when the cassette is inserted into the cassette holder, and stops the timekeeping when the start of running of the magnetic tape is detected, and the timer means detects the elapse of a specified time as the eject signal. A cassette tape recorder used as a signal.