JP2503801Y2 - Tape cassette loading device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tape cassette loading device in a magnetic recording / reproducing apparatus using a tape cassette such as a video tape recorder or an audio tape recorder, and more particularly to a cassette storage table. Using a driving force of a motor, the tape cassette is reversibly moved between a first position where the tape cassette is removable and a second position where the tape cassette inserted in the cassette storage table engages with the reel table. The present invention relates to a tape cassette loading device.

2. Description of the Related Art Conventionally, as a configuration for reversibly moving a cassette storage table between the first position and the second position described above by utilizing a rotational force of a motor, there is a configuration shown in FIGS. 3 and 4. is there.

FIG. 3 is an exploded perspective view showing the main part, and FIG. 4 is a side view of the main part.

In FIGS. 3 and 4, 1 is a cassette storage stand having an opening 1a into which a tape cassette (not shown) is inserted, and 2 is an upper part of the cassette storage stand 1 which is rotatable by a shaft 3. It is an upper plate attached to. This upper plate 2
As a result of the above-mentioned rotation, the tip end thereof is separated from the opening 1a of the cassette storage base 1 as shown in FIG. 4, and the tape cassette is easily attached / detached from the opening 1a and the tip end is opened. And a second position for covering the first position, and is constantly elastically biased by the spring 4 so as to assume the first position. Reference numeral 5 denotes a synchronous shaft having a rotatable central shaft 5a, which is engaged with the board chassis 6 by a caulking mechanism 6a. One end of a first rotating arm 7 is fixed to both ends of the central shaft 5a, and a pin 8 provided at the other end of the first rotating arm 7 is formed on the cassette storage base 1. It is slidably engaged with the slotted hole 9. Reference numeral 10 is a second rotating arm whose central portion is supported by the first rotating arm 7 so as to be rotatable by a pin 11, and one end of which is rotatable by a pin 12 to the cassette storage base 1. A pin 13 supported and provided at the other end is slidably engaged with an elongated hole 14 formed in the substrate chassis 6. Fifteen
Is a motor, and its rotational force is transmitted to a sliding gear 19 via a worm gear 16 and a first gear 17 and a second gear 18 coaxially provided with the first gear 17, With the rotation of 15 in the forward and reverse directions, the sliding gear 19 is configured to move in the arrow E and F directions. The movement of the sliding gear 19 is transmitted to the first rotary arm 7 via the third gear 20, and the first rotary arm 7 is moved by the arrow C,
It is configured to rotate in the D direction.

Now, when the cassette housing 1 is in the tape cassette attaching / detaching position as shown in FIG.
Rotates in the direction of arrow A against the force of the spring 4. By this rotation, the switch 21 is pressed, and a signal is sent to the control box 23 via the lead wire 22. When this signal is sent, the control box 23 drives the motor 15 in the forward direction, and the sliding gear 19 is moved in the direction of arrow F with this rotation.
When the sliding gear 19 moves in the arrow F direction, the first rotating arm 7 moves in the arrow C direction via the third gear 20 (see FIG. 4).
Then, the tape cassette storage base 1 is lowered to a predetermined operating position. With this descent, the pin 8 presses the end portion of the upper plate 2 and the upper plate 2 is moved to the second position against the force of the spring 4. When the tape cassette is taken out, when a take-out button (not shown) is pressed, the signal is applied to the control box 23 to cause the motor 15 to rotate in the reverse direction. With the reverse rotation of the sweater 15, the sliding gear 19 moves in the direction of the arrow E to rotate the first rotating arm 7 in the direction of D to raise the tape cassette housing base 1 to the tape cassette attaching / detaching position. The tape cassette storage stand 1
When the tape cassette is lifted to the attachment / detachment position, the pin 8 depresses the upper plate 2, and the spring 4 opens the upper plate 2 so that the tape cassette can be inserted more easily than the opening.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, when the tape cassette is moved between the first position and the second position by the rotational force of the motor and when the tape cassette is stationary at the first position. If the upper plate is suddenly pushed in due to an input, the cassette storage stand cannot move to the second position following the force and speed because the motor rotation speed is slow or is rotating in the opposite direction. Therefore, there is a problem that either the moving mechanism of the cassette storage table or the power transmission mechanism is destroyed.

Means for Solving the Problems A tape cassette loading device according to the present invention comprises a cassette storage base having an opening into which a tape cassette can be inserted, and the opening can be enlarged according to the movement of an upper plate, and the cassette storage base. Means for movably supporting between a first position where the tape cassette is detachable and a second position where the accommodated tape cassette engages with the reel base; and the cassette storage base for moving the tape cassette to the first position. A means for enlarging the opening by moving the upper plate in accordance with the movement, and the supporting means as the rotational force of the motor for moving the cassette storage base between the first position and the second position. And a switch that is driven by the pressing of the upper plate to start the rotation of the motor. The transmission means includes a gear rotated by the motor and a pin provided on the gear. And
And a spring body hung between the gear and the supporting means so that the pin elastically abuts and urges the supporting means in the direction in which the cassette storage base moves to the first position. It is what is done.

Action According to the above configuration, even if an input is suddenly applied to the upper plate in the direction in which the cassette storage base is moved from the first position to the second position, the cassette storage base can be moved by the extension of the spring, so that each mechanism It is possible to prevent damage to parts and maintain normal operation.

Embodiment FIG. 1 is an exploded perspective view showing an entire embodiment of a tape cassette loading device according to the present invention, and FIG. 2 is a side view of the main part. The same components as those in the conventional configuration are designated by the same reference numerals.

The difference between the conventional configuration and this embodiment is that the first configuration is such that the first rotation arm 7 is directly engaged with the third gear 20 driven by the sliding gear 19 and is rotated. However, in the present embodiment, the differential gear 25 rotatably attached to the central shaft 5a of the synchronous shaft 5 is engaged with the third gear 20, and the pin formed on the differential gear 25 is engaged. The point is that the first rotating arm 7 is driven via 26. That is, the spring 24 is applied between the differential gear 25 and the first rotating arm 7 so that the first rotating arm 7 always contacts the positioning pin 26 provided on the differential gear 25. The rotation position of one rotation arm 7 is regulated by the rotation position of the differential gear 25.

According to the above configuration, the first rotating arm 7 is the third gear.
By not directly engaging with 20, the sudden input is applied to the upper plate 2 when the motor is stopped and rotated in reverse, the cassette storage base 3 is forced to be pushed in the E direction, and the first rotation arm 7 is moved. Even if a strong turning force is generated in the C direction, the first rotating arm 7 is smoothly moved in the C direction by the spring body 24 extending even if the differential gear 25 meshed with the third gear 20 does not rotate. Since the cassette storage base 1 can be rotated in the direction E and can be moved in the E direction, it is possible to prevent destruction without applying a large weight to each mechanism.

As described above, according to the present invention, in the tape cassette loading device in which the cassette storage table is raised and lowered by the rotational force of the motor, a sudden input is applied to the cassette storage table when the motor is stopped or rotated in reverse. Even in such a case, the mechanical strength of the mechanism can be prevented by allowing the cassette storage table to move smoothly following the force and the speed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an essential part of an embodiment of a tape cassette loading device of the present invention, FIG. 2 is a side view of the essential part, and FIG.
FIG. 4 is an exploded perspective view showing a main part of a conventional tape cassette loading device, and FIG. 4 is a side view of the main part. 1 ... Cassette storage stand, 1a ... Cassette storage stand opening,
2 ... Upper plate, 3 ... Pin, 4 ... Spring body, 5 ... Synchronous shaft, 6 ... Board chassis, 6a ... Chassis caulking mechanism section, 7 ... First rotating arm, 8 ... Pin , 9 …… storage stand slot, 10 …… second pivot arm, 11 …… pin, 12 …… pin, 13 …… pin, 14 …… board chassis slot, 15 …… motor, 16… … Worm gear, 17 …… First gear, 18 ……
2nd gear, 19 …… Sliding gear, 20 …… Third gear, 21 …… Switch, 22 …… Lead wire, 23 …… Control box, 24 ……
Spring body, 25 …… differential gear, 26 …… pin.

Claims (1)

(57) [Scope of utility model registration request] 1. An opening into which a tape cassette can be inserted,
A cassette storage base whose opening is substantially expandable according to the movement of the upper plate, a first position at which the tape storage cassette is attachable to and detachable from the cassette storage base, and a tape cassette in which the stored tape cassette engages the reel base. Support means for movably supporting between the two positions, means for enlarging the opening by moving the upper plate with the movement of the cassette storage table to the first position, and rotational force of the motor. Means for transmitting to the supporting means as a moving force for moving between the first position and the second position in the cassette storage table, and a switch driven by pressing the upper plate to start rotation of the motor. The transmission means includes a gear rotated by the motor, a pin provided on the gear, and the pin elastically attached to the support means in a direction in which the cassette storage base moves to the first position. Manner so as to urge contact with the tape cassette loading apparatus which is more configuration and hung spring body between the gear and the support means.