JPH0449182B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a cassette ejecting device suitable for use in a video tape recorder using a cassette.

[Prior art]

Conventional ejection devices have the disadvantage that the locking mechanism is manually released, requiring a large operating force and a long operating stroke. Furthermore, the position of the eject button also depends on the position of the lock mechanism, so there is little freedom and this is disadvantageous in terms of design.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette ejecting device that requires less operating force and is inexpensive.

[Summary of the invention]

2. Description of the Related Art Conventionally, magnetic recording and reproducing devices such as VTRs include capstan motors that drive magnetic tape at a constant speed. If the power of this capstan motor can be used to release the locking mechanism of the cassette housing, an ejector device that requires less operating force can be obtained.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

1 and 2 are plan views of the VHS standard VTR mechanism, with FIG. 1 showing the stopped state and FIG. 2 showing the playing or recording state. FIG. 4 also shows a back view of the device in the stopped state.

In the figure, a substrate 1 has a pair of reel stands 2 and 3.
are arranged to be rotatable around shafts 1a and 1b set on the substrate, and when stopped, the tape 4 is housed in a cassette 5 held in a housing 18. Further, a motor 6 that can rotate in forward and reverse directions is fixed to the substrate 1. As shown in detail in FIG. 3, a pulley 7 is fixed to the output shaft 6a of the motor 6, and the rotational force of the motor 6 is transmitted through a belt 8 and a worm 9 to rotate gears 10 and 11. Although detailed illustrations are omitted, the gears 10 and 11 and the tape transfer members 12 and 13 are connected to links 14a and 14b,
and 15a, 15b, 15c, and the rotation of the gears 10, 11 causes the transfer member 12,
13 is activated, and tape loading and unloading operations are performed. On the other hand, a cam groove 11a is formed on the end surface of the gear 11, which engages with a pin 16a planted at one end of a relay member 16 that is rotatable about a shaft 1c on the board 1, An operating member 17, which is rotatable about the shaft 1d and has a pin 17a planted at one end, engages with the other end 16b of the relay member 16, and the operating member rotates in conjunction with loading and unloading operations. It is configured to do this. Further, in Fig. 4, 19 is a direct drive capstan motor, and as shown in Fig. 9, the eject switch 20 is activated when the device is stopped.
It is connected to a control circuit 22 including a circuit 21 that rotates the capstan motor 19 in forward and reverse directions for a predetermined period of time when turned on. Furthermore, near the motor portion 19a of the capstan 19, there is an arm 23 that is rotatable about a shaft 1e on the substrate 1.
As shown in detail in FIG. 6, the arm 23 includes a roller 24 that is rotatable around a shaft 23a on the arm;
An arm 26 that forms a friction clutch with the roller 24 is arranged by the pressing force of a compression spring 28 through a felt 25, and the movement of the arm 26 is controlled by the pressure of the compression spring 28.
It is regulated by the stopper 23b of No. 3. Further, the arm 23 is biased in one direction by a tension spring 27.

On the other hand, FIGS. 7 and 8 are side views of the housing 18 in FIG. 1. When the cassette 5 is inserted into the cassette housing 18 and pushed down from the state shown in FIG.
The state shown in Fig. 7 will be obtained. Further, when the lock plate 18a is rotated in the direction of arrow A from the state shown in FIG. 7, the lock pin 18b is released and the state shown in FIG. 8 is achieved.

Next, the operation of the present invention having the above configuration will be explained. Pin 1 on the operating member 17 when the device is stopped
7a does not come into contact with the arm 23 and the spring 27
The roller 24 is in contact with the rotor portion 19a of the capstan motor 19 due to the urging force. By pressing the eject switch, the capstan motor 19 rotates in the direction of arrow B for a certain period of time, and the arm 26 pushes the lock plate 18a in the direction of arrow A, thereby performing an eject operation. At this time, arm 23
The coupling torque between the arm 26 and the friction force between the rotor portion 19a and the roller 24 is determined by the lock plate 18a.
Needless to say, this is large enough to release the lock pin 18b. Furthermore, some time later,
The capstan motor rotates in the direction of arrow C, and the arm 26 rotates to a position regulated by a stopper 23b on the arm 23. When the device is in the playback or recording state, the operating member 17a is pressed as shown in FIG.
As a result of this movement, the arm 23 is rotated and the roller 24 is separated from the rotor portion 19a. Therefore, the capstan is not subjected to any load and can perform normal recording or reproducing operations.

〔Effect of the invention〕

According to the present invention, the cassette eject operation can be performed with the light operating force required to operate the electric switch, and moreover, the power of the capstan motor, which has conventionally been used for other purposes, can be operated. Since it uses , it is highly effective in terms of both performance improvement and economic efficiency. In addition, it can be operated using electrical signals, so
The degree of freedom in selecting the position of the operation button is increased, and the design effect is also great.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the stopped state of the embodiment of the present invention, FIG. 2 is a plan view showing the playback (recording) state, FIG. 3 is a plan view showing the main parts, and FIG.
FIG. 5 is an explanatory diagram showing the movement of the operating member, FIG. 6 is an explanatory diagram showing the movement of the arm, and FIGS. 7 and 8 are side views of the cassette housing. FIG. 9 is a block diagram of the capstan operating circuit. 1... Chassis, 5... Cassette, 18... Cassette housing, 18a... Lock plate, 19...
Capstan motor, 22... control circuit, 23... arm, 24... roller.

Claims (1)

[Claims] 1: a cassette housing that can hold a cassette and move it between a playing position and an ejecting position; a housing lock mechanism that locks the housing in the playing position; a capstan that drives a magnetic tape stored in the cassette; An eject operation member is arranged so as to be in contact with a part of the capstan only when the tape is being stored in conjunction with the tape drawer and store operations, and a system control is configured so that the capstan operates for a certain period of time in response to an eject signal. 1. A cassette ejecting device comprising a circuit, wherein an eject signal is generated by an eject operation to rotate the capstan and operate the eject operating member to release the housing lock mechanism.