JPH054122Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a loading mechanism for a magnetic recording/reproducing apparatus that stably inserts and ejects a cassette.

<Prior Art> When a cassette is pushed into a predetermined position in a magnetic recording/reproducing apparatus, the cassette is housed in a cassette holder with a pressing member such as an arm in contact with the tip of the cassette. Then, it is transported to a predetermined recording/reproducing position. Further, during ejection, the cassette is pushed out from the cassette holder by the pressing force of the pressing member.

Since a roller pin is normally used as the pressing member, the portion that comes into contact with the roller pin serves as a fulcrum and is pushed in and pushed out.

<Problem that the invention aims to solve> However, when installing, even if the center of the cassette is pressed, it is not possible to push the cassette in a well-balanced manner against both roller pins, that is, with equal pressure, and the cassette may be pushed in unevenly. many. In this case, the cassette itself will be in an unbalanced position to the right, and it will not be able to align with the recording and reproducing device, making it impossible to expect accurate recording and reproducing.

On the other hand, even when ejecting a cassette that is in an eccentric state, the cassette is pushed back in the eccentric state, making it impossible to perform a smooth ejection operation.

<Means for solving the problem> The present invention was devised in order to solve the above problem, and is arranged in a chassis so as to be movable in the front and back direction, and a cassette containing a recording medium is inserted. a cassette holder to be removed; a pair of link plates rotatably supported within the chassis so that their respective free ends face the front end surface in the insertion direction of the cassette; and a pair of link plates coupled to the pair of link plates; The free ends of the pair of link plates are each slidably connected to a lever that synchronizes the rotational movement of the pair of link plates and moves the respective free ends of the pair of link plates in the same front and rear directions, and The device is characterized by comprising a pressing plate that moves in the front and rear directions within the chassis in conjunction with the rotational movement of the pair of link plates, and a spring that biases the pressing plate in the cassette ejection direction. be.

<Function> In other words, both link plates are rotated simultaneously by the lever, and are slidable relative to the press plate via the slide pin, so even if the press plate is pressed in an eccentric state, no pressure is applied. The plates themselves perform parallel movements.

Therefore, the cassette that has come into contact with the pressing plate in an eccentric state is corrected to a predetermined posture, and the cassette can always be operated in the correct posture during pushing and ejection.

<Example> The cassette discharge device of the present invention will be described in detail below based on the drawings.

Fig. 1 is a perspective view showing the cassette loading mechanism, Fig. 2 is a top view of the slide plate explaining the cassette loading mechanism according to the present invention, Fig. 3 is a schematic diagram explaining the operation, and Fig. 4 is a cassette loading mechanism. FIG. 5 is a plan view of the cassette being pushed in, and FIG. 5 is a plan view of the cassette being ejected.

The main components of the cassette loading mechanism are: a cassette holder 1 into which a cassette 2 containing a recording medium is inserted, loaded to a predetermined position, and ejected; a chassis 3 serving as an exterior body; and a chassis 3 disposed between the cassette holder 1 and the chassis 3. A pair of link plates 5 and 6 are connected to both the link plates 5 and 6 to synchronize the rotation of the link plates 5 and 6. , a lever L that moves each free end of these link plates 5, 6 in the same direction forward and backward, and a pressing plate 7 that is attached to the tips of both link plates 5, 6 and moves in the front and rear direction within the chassis 3. Consists of.

Cassette holder 1 has a generally rectangular cross section and is provided at its bottom rear end with projections 1a, 1a which function as stoppers for cassette 2 (see FIG. 4).

At the front and rear ends of both sides of the cassette holder 1, a pair of pins 1b, 1b, .

On the other hand, the chassis 3 has a substantially rectangular cross section, and has round-shaped through holes 3a, 3a, . In addition, arcuate grooves 3b, 3b are formed at both ends of the upper surface approximately at the center, and engaging sides 3c, 3c are formed in continuity with the arcuate grooves 3b, 3b, approximately parallel to the moving direction of the cassette holder 1. has been done.

Further, the slide plate 4 has a generally-shaped cross section, and inclined grooves 4a, 4a, . . . are bored on both sides thereof at positions corresponding to the pins 1b, 1b. Inside the slide plate 4, the cassette holder 1 has its pins 1b,
1b... are attached to the inclined grooves 4a, 4a... passing through them. On the inner side of the upper surface 41 of this slide plate 4, as shown in FIG.
is pivotally supported by pins P ₁ and P ₁ . One end of the link plates 5, 6 is pivotally supported by each end of the lever L, and the other ends of both link plates 5, 6 are supported by a slide pin.
They are attached to horizontally long grooves 71, 71 formed in one pressing plate 7 via P ₂ and P ₂ . At least one of the link plates 5 and 6 is biased by a spring v in a predetermined direction, that is, in the direction in which the pressing plate 7 discharges the cassette. Further, engagement pins 5a and 6a are provided at substantially central sides of the link plates 5 and 6, respectively.

The insertion and ejection of the cassette 2 in the cassette loading mechanism having the above structure will be explained.

As shown in FIG. 4, when the cassette 2 is inserted into the cassette holder 1 and pushed in the direction of the arrow, the front end of the cassette 2 comes into contact with the projections 1a, 1a.

When the cassette 2 is pushed further in, the pins 1b, 1b, . . . of the cassette holder 1 slide within the circular through holes 3a, 3a. At this time, the front cover 2a of the cassette 2 presses against the pressing plate 7, as shown in the schematic diagram of FIG. Then, the engagement pins 5b and 6b are inserted into the arcuate groove 3.
b, 3b to engage the engaging sides 3c, 3c while sliding.

The pressing plate 7 pressed by the front cover 2a of the cassette 2 moves the slide pins P ₂ and P ₂ into the horizontal grooves 71 and 71.
Rotate the link plates 5 and 6 while sliding them inward. Since both the link plates 5 and 6 are connected by the lever L, there is no difference in rotation speed, in other words, the press plate 7 can always be moved in parallel. Back cassette 2
Even if the press plate 7 is pressed in an eccentric state, the pressing plate 7 itself will correct the eccentricity.

On the other hand, when cassette holder 1 slides, pin 1
b turns on the micro switch 9 and drives the loading motor provided at the bottom of the chassis 3. The drive of this loading motor is easily transmitted via a reduction gear to move the slide plate 4 itself into the chassis 3. When the switch 10 is turned off in response to this movement, the loading motor stops driving. The pins 1b, 1b are connected to the vertical grooves of the through holes 3a, 3a and the inclined grooves 4a, 4a.
... is slid down and the front cover of the cassette 2 is opened using a door opener provided at the bottom of the chassis 3, and the magnetic tape comes into contact with the magnetic head to perform playback and recording.

Next, in order to eject the cassette 2 at the end of playback/recording, each of the operations described above is generally performed in reverse. As shown in FIG. 5, when the pressing plate 7 is in contact with the front cover of the cassette 2, the engaging pins 5b, 6b reach the arcuate grooves 3b, 3b from the engaging sides 3c, 3c, and at the same time, The link plates 5 and 6 are rotated outward by the biasing force of the coil spring v. Through the crank operation of the lever L, both link plates 5 and 6 rotate substantially simultaneously and eject the cassette 2 at the same speed.

<Effects of the invention> As described above, the cassette loading mechanism of the invention has a good balance between the pushing and ejecting operations by the parallel movement of the pressing plate by the pair of link plates, and also allows the cassette to be placed in the correct position even when the cassette is in an eccentric state. Since the correction is performed, recording and playback operations can be performed with high accuracy. Furthermore, the cassette is not damaged when it is pushed in and ejected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the cassette loading mechanism, FIG. 2 is a top-down view of a slide plate explaining the cassette loading mechanism of the present invention, and FIG.
A schematic diagram illustrating the same operation, FIG. 4 is a plan view of the cassette being pushed in, and FIG. 5 is a plan view of the cassette being ejected. 1...Cassette holder, 1b, 1b...pin,
2... Cassette, 3... Chassis, 4... Slide plate, 5, 6... Link plate, 5a, 6a... Engagement pin, 7... Pressing plate, 71, 71... Horizontal groove, L
...Lever, P ₁ , P ₁ ... Pin, P ₂ , P ₂ ... Slide pin.

Claims (1)

[Scope of Claim for Utility Model Registration] A cassette holder which is disposed so as to be movable in the front-rear direction within a chassis and into which a cassette containing a recording medium is inserted and removed, and each free end thereof faces the front end surface of the cassette in the insertion direction. a pair of link plates rotatably supported within the chassis; A lever that moves the free ends of the pair of link plates in the same longitudinal direction is slidably connected to the free ends of the pair of link plates, and the lever moves the free ends of the pair of link plates in the longitudinal direction within the chassis in conjunction with the rotational movement of the pair of link plates. 1. A cassette loading mechanism for a magnetic recording/reproducing apparatus, comprising: a movable pressing plate; and a spring for biasing the pressing plate in a cassette ejection direction.