JPS5814448Y2 - Cassette tape attachment/detachment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette tape attachment/detachment device for a cassette tape recorder.

When loading and unloading a cassette tape into a tape recorder, the cassette is attached to a cassette holder and rotated to the operating position or loading/unloading position. The braking action is released and the braking action is performed on the support, and the engaging pawl of the reel shaft is chamfered to facilitate attachment and detachment of the cassette.

Since the cassette holder is generally opened by the force of a spring, there is a delicate balance between the brake and the spring, and if this is too strong, the cassette holder may not open.

The purpose of the present invention is to release the braking action on the reel support when the cover of a tape recorder is opened, thereby facilitating the attachment and detachment of the cassette hub to the reel shaft, and to make it easier to attach and detach the cassette hub to the reel shaft. To provide a device which prevents tape feeding even if an operating knob is erroneously operated.

The present invention will be explained below with reference to the illustrated embodiments.

In FIG. 1, the ribs 4a and 4b of the cover 4 (see FIGS. 2 and 3) are fitted into the grooves 2 and 3 provided on both sides of the cassette tape recorder 1. are adapted to be opened and closed by moving in a straight line, and numerals 5 and 6 represent magnetic heads, and γ represents an operating knob, respectively.

The reel shaft 8.9 is formed integrally with the reel supports 11, 12 and is pivoted to a suitable support member.

In FIG. 4, a drive shaft 16 that is substantially integral with a flywheel 15 is pivotally connected to one end of an actuating member 14 that is pivotally connected to a stationary member by a shaft 13. It is connected to the pulley 19 of the motor 18 by.

The first slide plate 21 is supported so as to be able to slide in the left and right direction in the figure when normal operations such as recording, playback, fast forwarding and rewinding are performed. A cam 24,25 is fixed to the free ends of the springs 22, 23, respectively, and the actuating member 1
4 protrusion 14a.

14b.

The second slide plate 26 is the first slide plate 2
1 and a long hole 27 provided therein.
, 2B are fitted onto a shaft (not shown) and supported by the slide 1, and a protrusion 26a provided at one end thereof is
As shown in FIG. 1, it can extend from one side of the tape recorder 1.

Further, the curved piece 26b provided thereon extends into the passage of the groove 2, and is pushed and moved by the stepped portion 4c provided on the rib 4a when the cover 4 is opened.

Brake members 31 made of leaf springs are attached to the reel shafts 8 and 9.
, 32 are fixed to each other, and brake shoes 33 and 34 fixed to the negative surfaces of the reel holders 11 and 32 are fixed to each other.
12 to perform a braking or release action.

At the free end of the brake member 31.32 there is a cam 35.36
are fixedly installed, and are in pressure contact with the side edges 21a and 26c of the first and second slides 21 and 26, respectively.

A magnetic tape 41 is wound around the hubs 38 and 39 of the cassette tape 3γ shown in FIG. 8, and the knob 38 is fitted into the engaging pawl 8a of the reel shaft 8 shown in FIG.

When the actuating member 14 is in the position shown in FIG. 4, the cams 35, 36 of the brake members 31, 32 are in the recesses 21b, 21c of both the slide plates 21, 26.

26d and 26e, respectively, and the brake shoes 33 and 34 press against the reel receivers 11 and 12, respectively, to perform a braking action.

When the first slide plate 21 is moved in the direction of the arrow 43 in FIG. 4 by normal operation of the tape recorder, the cams 35 and 36 ride on the side edges 21a of the first slide plate 21, so that the reel receivers 11 and 1
The braking action for 2 is released.

Then, the actuating member 14 is rotated counterclockwise in FIG. Winding is performed.

Similarly, when the first slide plate 21 moves in the direction of the arrow 44, the reel receiver 11 is driven and the magnetic tape 41 is wound onto the hub 38.

The cassette tape 3γ is attached and detached when the actuating member 14 is in the neutral position shown in FIG.
32 is in operation, but when the rotation of the reel shafts 8, 9 is restricted, the fitting action of the tabs 38, 39 to the engaging pawl 8a is not smooth. , it is necessary to release the above brake.

When attaching and detaching the cassette tape 37, the cover 4 is inevitably opened, so during the opening, the stepped portion 4c of the cover 4 pushes the contact piece 26b, and the second slide putty 26
is moved in the direction of arrow 44 in FIG.

As a result, the cams 35, 36 and the brake members 31, 3
2 is pushed down, the braking action on the reel receivers 11 and 12 is released, and the cassette tape 3T can be easily attached to and removed from the reel shafts 8 and 9 in the free state.

When the cover 4 is closed, the protrusion 26a is pushed in by the back plate 4d, and the second slide plate 26 returns to its original position.

On the other hand, if the operating knob 7 is rotated by mistake with the cover 4 open, the drive shaft 16 will come into pressure contact with one of the reel receivers 11 and 12 and drive it, causing the magnetic tape 41 to be idle. There is a risk of damaging it.

To prevent this, the second slide plate 26 is
When the second slide plate 26 is moved in the direction of the arrow 43, the protrusion 2 of the second slide plate 26 is turned off.
A switch 46 is provided as a first control means for the power supply, which is turned on by the operation knob 1.
The switch 4γ is connected in series with a switch 4γ which serves as a second control means for the power supply operated by the switch 4γ (see FIG. 4).

As a result, when the cover 4 is open, the switch 4
Even if the magnetic tape 7 is accidentally closed, the power supply 48 will not energize the motor 18 because the switch 46 is in an open state, and therefore, the situation where the magnetic tape 41 is accidentally fed into the cassette is prevented.

According to the present invention, when the cover is opened to attach or detach a cassette tape, the braking action on the reel shaft is released by the mechanism linked to this, so the cassette can be easily attached or detached without using a cassette holder. In addition, when the cover is open, the drive limit function is completely released and tape feeding due to erroneous operation is prevented.

Further, during normal operation of the tape recorder, releasing the brake on the reel and controlling the drive of the reel can be performed by a single member, so that the structure of the tape recorder can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a cassette tape recorder to which the device of the present invention is applied, Fig. 2 is a top side view of the same, Fig. 3 is a perspective view of the cover, and Fig. 4 is a cassette attachment/removal showing an embodiment of the present invention. 5 is a right side view of the device shown in FIG. 4, FIG. 6 is a front view of the first slide plate, FIG. 1 is a perspective view of the reel shaft, and FIG. 8 is a view of the cassette tape. Front view,
FIG. 9 is a perspective view of the second slide plate. 1...--Cassette tape recorder 4...
...Cover 8, 9... Reel shaft, 11, 12
... Reel holder, 14 ... Fraudulent parts, 31
, 32... brake member, 21... first
Slide plate, 26...Second slide plate, 46...Switch.

Claims (1)

[Claims for Utility Model Registration] The base end of each reel holder is arranged on the rotating shaft, and the reel holder extends substantially parallel to the surface, and the control piece at the extending end controls the braking action for each reel. a brake member having a friction member disposed at a position facing the reel holder at the extending end so as to be able to move toward and away from the reel; and a brake member disposed substantially perpendicularly to the brake member; It is detachable from the control piece of the member and has a rotary drive member for each reel, and when performing normal operations of the tape recorder such as recording, playback, fast forwarding and rewinding,
A first slide plate that releases the braking action of the reel by the brake member by disengaging from the control piece of the brake member, and also rotates the reel based on the selected normal operation by interlocking the drive member. , is slidably disposed parallel to and adjacent to the first slide plate, and is capable of being freely engaged with and detached from the brake member, and is configured to move the cover of the tape recorder in the sliding direction of the first slide plate. a second slide plate that interlocks and slides in a straight line along that direction when the cover is opened by sliding it parallel to the cover; and a second slide plate that turns off the power by the second slide plate when the cover is opened and turns on the power when the cover is closed. and a second control means for turning on and off the power supply during normal operation and non-operation in conjunction with the movement of the operation means for performing the normal operation, A cassette tape attachment/detachment device characterized in that the first means and the second means are connected in series to the power source.