JP2551427Y2 - Video tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a video tape recorder that performs recording and reproduction by attaching a video cassette tape.

"Prior art" Conventionally, when a video cassette is removed, the cassette holder at the video cassette exit position is fixed with a lock arm, preventing the cassette holder from moving except when the video cassette is inserted, and preventing the loading gear mechanism etc. from being damaged. There was technology.

"Problems to be Solved by the Invention" In the conventional technology, when a vibration impact force in the cassette insertion direction is applied to the lock arm due to dropping during transportation or the like, the lock arm detaches from the cassette holder, and the cassette holder moves. And damage the loading gear mechanism.

`` Means for solving the problem '' However, the present invention relates to a video tape recorder provided with a lock mechanism for fixing a cassette holder at a video cassette exit position on a side plate on which a cassette holder is movably movable back and forth and up and down. The lock mechanism includes a lock arm that is rotatably mounted on one side of the cassette holder and a ridge that is fixed to the side plate, and the lock arm is provided with a vibration and impact force in a cassette insertion direction. ,
A rotation fulcrum is provided at a position where it rotates in only one direction engaging with the ridge.

[Operation] Therefore, when a vibration impact force in the cassette insertion direction is applied to the lock arm during transportation, the lock arm is released as a moment force in the direction of engaging with the ridge, so that the lock arm comes off during transportation and the cassette holder is disengaged. Can be prevented from moving, and can be handled more safely than before.

"Example" Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a main part, and FIG. 2 is an explanatory plan view. FIG. 1 is a plan view of a rectangular deck chassis (1).
(3) is erected and fixed, and loading gear mechanisms (5) and (6) driven by a loading motor (4) are arranged outside the side plates (2) and (3). A cassette holder (7) is provided between the side plates (2) and (3), and a video cassette (8) is inserted into and out of the holder (7).

A tape running motor (9), a flywheel (10) rotated by the motor (9), and a capstan shaft (11) standing and fixed on the flywheel (10);
A pinch roller (12) to be joined to the shaft (11), a winding and rewinding reel shaft (13) (14) to be engaged with a reel shaft of the cassette (8), and a movable on a loading chassis (15). Tape loading pins (16) and (17)
A video head unit (18) having a rotatable cylinder drum and a video head, a video erasing head (19), and an audio head unit (20) are arranged on the upper surface of the deck casing (1). ) Through the reel axis (13) (1
4) When the cassette (8) is mounted, the video tape (21) of the cassette (8) is pulled out with the loading pins (16) and (17), and the video tape (21) is wound around the cylinder drum of the video head (18). Half-wrap the capstan shaft (1
The tape (21) is run at a constant speed by the pinch roller (1) and the pinch roller (12) to perform recording and playback.

Further, as shown in FIGS. 1 and 3, the left side plate (2)
A left lock arm (23) for detachably engaging the ridge (22) of the cassette is provided, and the left side of the cassette holder (7) is attached to the left side plate (2) when the video cassette (8) is retracted.
The lock arm (23) is resiliently locked to the ridge (22) by a spring (24) and the center of gravity of the lock arm (23) is a pivot (25) serving as a pivot point. The video cassette (8) is rotatably supported on the side of the cassette holder (7), and provided with a lock arm (23) in a position displaced in the cassette holder (7) fixing operation direction due to vibration and impact generated during transportation or the like. Except during insertion, the lock arm (23) is configured to be kept engaged with the ridge (22). That is, as is clear from FIG. 5, when the force (a) is applied to the lock arm (23) due to a drop during transportation or the like, the lock arm (23) is moved to the position (Z) at the position (Z). , A reaction force (A) is generated. The reaction force (A) becomes vector (B) and vector (C) when the vector is decomposed, and vector (B)
Does not operate because the force is regulated, the force of the vector (C) is applied to the lock arm (23), and the lock arm rotates in the (α) direction, that is, in one direction engaging with the ridge (22). Things.

Also, a right lock arm (28) (2) that is elastically and resiliently engaged with the projection (26) of the right side plate (3) by a spring (27).
9), and the left lock arm (23) and the right lock arm (28) (29) are displaced by bringing the tip of the video cassette (8) to be inserted into the cassette holder (7) into contact with the ridge (22). ) And the protruding piece (26) to perform a loading operation of moving the cassette holder (7) back and forth and up and down, thereby allowing the video cassette (8) to enter and exit.

As shown in FIG. 4, left and right leaf springs (30) and (30) are provided on the upper surface of the video cassette (8) to be inserted into the cassette holder (7), and are provided at the upper ends of both side plates of the cassette holder (7). An upper reinforcing frame (31) for fixing both ends is provided, and holding members (3) are provided on both sides of the frame (31).
2) (32) is integrally formed, and one end of the leaf spring (30) (30) is sandwiched between the upper end of the side plate of the cassette holder (7) and the frame (3).
The retaining body (32) (32) of 1) is fixed by screws (33) (33). The retaining spring (30) prevents deformation of the leaf spring (30) beyond a predetermined level. Is deformed within the elastic limit to prevent the leaf spring (30) from being permanently deformed.

"Effects of the Invention" As is apparent from the above embodiments, the present invention provides a video cassette (8) in which the cassette holder (7) is attached to the side plates (2) and (3) on which the cassette holder (7) is movably movable back and forth and up and down. In a video tape recorder provided with a lock mechanism for fixing at a retreat position, a lock arm (23) rotatably mounted on one side of the cassette holder (7) and a ridge fixed to the side plate (2). (22) is provided in the lock mechanism, and the lock arm (23) is located at a position where the lock arm (23) rotates only in one direction to engage with the ridge (22) when a vibration impact force is applied in the cassette insertion direction. It has a pivot point (25), and when a vibration impact force in the cassette insertion direction is applied to the lock arm (23) during transportation, the lock arm (23) is used as a moment force in the direction of engaging with the ridge (22). Act on , The way to the lock arm (23) is disengaged transport prevents the cassette holder (7) moves, than the conventional one in which can be handled safely.

[Brief description of the drawings]

1 is an explanatory view of a main part showing an embodiment of the present invention, FIG. 2 is an explanatory plan view of a video tape recorder, FIG. 3 is an explanatory partial plan view, FIG. 4 is a partial side view, FIG. FIG. 8 is an explanatory view of the operation of the lock arm when a vibration impact force in the cassette insertion direction is applied to the lock arm during transportation. (7) Cassette holder (8) Video cassette (23) Lock arm (25) Support shaft (rotation support point)

Claims (1)

(57) [Scope of request for utility model registration] 1. A video system having a lock mechanism for fixing a cassette holder (7) at a video cassette (8) exit position on a side plate (2) (3) for mounting a cassette holder (7) movably back and forth and up and down. In the tape recorder, a lock arm (23) rotatably mounted on one side of the cassette holder (7) and a ridge (22) fixed to the side plate (2) are provided in the lock mechanism. Lock arm (2
3) A video tape having a rotation fulcrum (25) at a position where it rotates in only one direction to engage with the ridge (22) when a vibration impact force in the cassette insertion direction is applied. Recorder.