JP2508430B2 - Lock device for cassette holder - Google Patents

Description

The present invention relates to a cassette holder locking device in a recording / reproducing device such as a cassette tape recorder.

[Outline of Invention]

The present invention relates to a cassette holder locking device in which a lock pin and a locking member are engaged with each other in a closed state of the cassette holder with respect to the recording / reproducing apparatus main body, and the lock pin is engaged with the locking member when the cassette holder is locked. By providing a stopper that is sandwiched between the cassette holder and the portion, it is possible to prevent rattling when the cassette holder is locked and to reliably hold the cassette.

[Conventional technology]

For example, in a cassette type tape recorder, by loading the tape cassette into the cassette holder and closing and locking the cassette holder, the tape cassette is held at a predetermined cassette mounting position, and recording / reproducing operation is performed in this state. Has been done.

Conventionally, a cassette holder locking device in this type of cassette tape recorder has, for example, a lock pin protruding from the cassette holder side and a lock member provided in the tape recorder body corresponding to the lock pin,
When the cassette holder is closed, the lock pin is engaged with the lock member so that the cassette holder is locked.

By the way, this locking device is arranged only on one side of the cassette holder in the case of a relatively inexpensive cassette tape recorder, and is arranged on both sides of the cassette holder in order to firmly lock it in the case of a high-end machine. In any case, in order to securely lock the cassette holder, an overstroke in the closing direction of the cassette holder, that is, a required play is provided so that the cassette holder can be pushed further deeply after the lock pin and the lock member are engaged. is there. That is, when the lock device is arranged on one side, the lock member and the lock pin may not be accurately corresponded to each other due to an error in assembly, and the engagement may not be surely performed. By forming a clearance in the part so that the cassette holder can move in an overstroke when locked, it is possible to absorb the assembly error between the lock member and the lock pin, and when the lock devices are arranged on both sides. Due to the left and right twists generated in the cassette holder, the lock member and the lock pin of the lock device on the other side are engaged even if the lock member and the lock pin of the lock device on one side are engaged in the locking operation of the cassette holder. The lock device on both sides may be locked by providing an overstroke of the cassette holder, Locking by click device is performed respectively securely, that is, made so as to ensure the synchronization of both sides of the lock.

[Problems to be solved by the invention]

However, since this conventional cassette holder locking device has an overstroke after the cassette holder is locked, backlash corresponding to the overstroke occurs in the locked state of the cassette holder. The holding power of the tape cassette due to changes due to external influences such as sound pressure may increase the modulation noise and deteriorate the sound quality, and if there is rattling when the cassette holder is pushed in the locked state, it gives a high-class feeling. There is a problem in that it causes damage to the user and makes the user feel uneasy.

The present invention has been made in view of the above problems, and an object thereof is to eliminate rattling that occurs when the cassette holder is locked, and to solve the above-mentioned problems.

[Means for solving problems]

In order to achieve the above object, the present invention provides a cassette holder that is movable in the opening / closing direction with respect to the main body of a recording / reproducing apparatus such as a cassette tape recorder, and the cassette holder in a closed state with respect to the main body of the recording / reproducing apparatus. It has a lock mechanism consisting of a lock pin for locking and a lock piece as a lock member, so that when the cassette holder returns from the overstroke state in the closing direction, the lock pin and the lock piece are engaged so that the cassette holder is closed and locked. The lock device for a cassette holder described above is provided with a stopper member for sandwiching the lock pin with the engaging portion of the lock piece when the cassette holder is closed and locked.

[Action]

 The above-described means works as follows.

When the cassette holder is pushed from the open position to the closing direction and the lock pin exceeds the position where it is engaged with the lock piece, the stopper is moved by the force of the cassette holder so as to escape from the lock pin. When it is pushed further deeper, that is, overstroke, and when the hand is released from the cassette holder in this state, the cassette holder is moved to return in the opening direction, the lock pin engages with the lock piece, and the stopper becomes the lock pin. The lock pin engages from the opposite direction and the lock pin is clamped between the lock piece and the lock piece, whereby the cassette holder is firmly locked without rattling. Become.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, (1) shows the cassette device part of the cassette tape recorder as a whole, and (2) is a fixed substrate fixed to the cassette tape recorder body, and a pair of left and right fixed to the lower end of the fixed substrate (2). Bracket (3
In a) and (3b), the cassette holder (4) into which the tape cassette C is loaded is opened and closed by the shaft (5), that is, in the direction in which the cassette holder (4) comes in contact with and separates from the tape drive unit formed on the front surface of the fixed substrate (2). It is pivotally supported. In addition, (6a) (6
b) is the reel shaft of the tape drive unit.

A torsion spring (7) is interposed between the cassette holder and the bracket at the pivotal support of the cassette holder (4), and the biasing force of the torsion spring (7) causes the cassette holder (4) to always open. That is, the fixed substrate (2) is rotatably biased in a direction away from the tape drive unit.

The cassette holder (4) is configured to be locked in a state where the tape cassette C is mounted at a predetermined position of the tape drive unit by a lock mechanism L formed between the side portion of the cassette holder (4) and the fixed substrate (2). .

 The lock mechanism L is configured as follows.

A lock pin (10) is provided at the center of the rear edge of the side surface of the cassette holder (4). On the other hand, the lock pin (10) is provided upright on the rear surface side of the fixed substrate (2) corresponding to the lock pin (10). A lock plate (12) is pivotally supported by a shaft (13) on the bracket (11). The lock plate (12) is provided with a lock piece (14) protruding forward with a required length, and a concave cutout portion is formed at a lower edge thereof. The width of this notch is formed larger than the diameter of the lock pin (10), and the front side edge of this notch has an engaging portion (14a) that engages with the lock pin (10) as described later. Further, the tip edge portion (14b) of the lock piece (14) is formed in a shape that inclines backward from the upper end to the lower end in a curved manner.

A tension coil spring (15) is stretched between the upper end of the lock plate (12) and the upper end of the fixed substrate (2), and the lock plate (12) is always locked by the biasing force of the tension coil spring (15). The piece (14) is rotatably biased downward, that is, in the direction of engaging the lock pin (10), and the bracket (1
A locking pin (16) is provided at a predetermined position of (1) and the front edge of the upper end of the lock plate (12) is abutted and locked to the locking pin (16) to lock the lock plate (12). ) Is a lock piece (14)
The downward rotation is restricted in a state in which it is held at a substantially horizontal position.

The bracket (11) further has an eject lever (17) axially supported by a shaft (17a) located below the lock plate (12), and an upper end (17b) thereof is bent at a right angle to lock. Engagement hole (12a) formed at the lower end of the plate (12)
The Yes engage and the lower end portion (17c) is bent forward, its bent to operating piece laterally terminal portion (17c ₁₎ is formed, the operation piece (17c ₁ ) To rotate the eject lever (17), the locking piece (14) is interlocked with this to rotate in the upward direction, that is, the direction in which the engagement with the locking pin (10) is released. It is made to move.

Further, in the lock device L, a stopper (18) is further positioned inside the lock plate (12) and is rotatably supported by a shaft (13) in the same direction as the lock piece (14).

The stopper (18) of this example is formed of a resin material, and an inverted J-shaped elastic arm portion (19) is integrally formed on the upper edge of the stopper (18), and a locking pin ( 19
a) is inserted and fitted into an engagement hole (11a) formed at a predetermined position of the bracket (11), and the stopper (18) is always rotated downward by this elastic arm portion (19). When the lock pin (10) and the lock piece (14) are engaged with each other, the lock pin (10) engages with the lock piece (14) from a direction opposite to the engaging portion (14a) of the lock piece (14). It is designed to meet.

The edge (18a) of the tip of this stopper (18)
Is formed by inclining slightly rearward from the upper end to the lower end so that it can be easily engaged with the lock pin (10),
Further, a chamfer (18b) is attached to a corner portion of the lower end of the lock pin (10) so that the lock pin (10) can be easily pushed up.

Further, on the lower front edge of the lock plate (12), a protruding piece (20) is bent into an L-shape corresponding to the lower edge of the stopper (18), and the stopper (18) is This piece (20)
It is configured to be held at a predetermined rotational position, that is, a position facing the engaging portion (14a) of the lock piece (14) with a required space by being brought into contact with and supported by. In this state, the distance between the tip of the stopper (18) and the engaging portion (14a) of the lock piece (14) is set to be substantially equal to or slightly larger than the diameter of the lock pin (10). .

The lock mechanism L configured in this way is symmetrically arranged on the left and right sides of the cassette holder (4) except for the eject levers (17), and the lock plates (12) of the lock mechanism L on both sides are arranged. The connecting levers (12b) extending from the upper edge of the lock lever L are integrally connected to each other, whereby the eject lever (1
By operating 7), the lock plate (1
2) is operated at the same time.

Next, the lock mechanism L of the cassette holder (4) in the cassette tape recorder of this example configured as described above.
The operation of will be described.

When mounting the tape cassette on the cassette mounting portion of the cassette tape recorder, first, as shown in FIG. 3A, the cassette holder (4) is in an open state, that is, the fixed substrate (2) is separated from the tape driving portion and inclined forward. In this state, the tape cassette C is loaded in the cassette holder (4), and in this state, the cassette holder (4) is pushed by hand against the biasing force of the torsion spring (7) in the closing direction, that is, backward. Rotate.

When the cassette holder (4) rotates, the lock pin (10) causes the inclined end edge (14b) of the lock piece (14).
When the lock pin (10) contacts the lock piece (1
The tip edge portion (14b) of 4) is continuously pressed, whereby the lock piece (14) is rotated in the upward direction, that is, the unlocking direction, and the protrusion piece is accompanied by the rotation of the lock piece (14). (20)
By pressing the lower edge of the stopper (18), the stopper (18) is rotated upward in association with the biasing force of the elastic arm (19) in conjunction with the lock piece (14). Figure 3B
reference).

When the lock pin (10) gets over the engagement portion (14a) of the lock piece (14), the lock piece (14) is returned and rotated in the downward direction, that is, the lock direction by the biasing force of the tension coil spring (15). The stopper (18) is kicked up by the lock pin (10) by the momentum of the rotation of the cassette holder (4) and escapes upward, whereby the lock pin (10) of the cassette holder (4) is locked by the lock piece (14). )
It is pushed deeper rearward than the position where it is engaged with the engaging portion (14a), and becomes an overstroke state (see FIG. 3C). This operation will be described in more detail. When the lock pin (10) passes over the engaging portion of the lock piece (14) and the lock piece (14) is rotated downward, the pressing support by the protruding piece (20) is performed. Since it is released, the stopper (18) also follows and tries to rotate downward, but the cassette holder (4)
The rotation of the lock pin (10) causes the lock pin (10) to enter the lower side of the stopper (18) faster than the stopper (18) is rotated downward, which causes the stopper (18) to move above the lock pin (10). It will be kicked up and turned to escape. In this operation, the chamfer (18b) is attached to the lower end corner of the tip of the stopper (18), so that the kicking operation of the stopper (10) is smoothly performed.

Then, after the cassette holder (4) is pushed past the position where the lock pin (10) and the lock piece (14) are engaged, the cassette holder (4) is released, and the cassette holder (4) is released. The biasing force of the torsion spring (7) causes it to rotate in the forward direction, whereby the lock pin (10) is brought into contact with the engaging portion (14a) of the lock piece (14) and the stopper (18). ) Is rotated downward by the biasing force of the elastic arm portion (19) and engages with the lock pin (10) from the direction opposite to the engaging portion (14a) of the lock piece (14), that is, from the rear side to lock. The pin (10) is clamped between the engaging portion (14a) of the lock piece (14), and thus the cassette holder (4) is locked so that it cannot rotate in the front-rear direction (see FIG. 3D). , The tape cassette C is a tape drive unit formed on the fixed substrate (2). It is attached and held in place.

When removing the tape cassette C from this state,
When the lock piece (14) is rotated upward by pushing the operation piece portion (17c ₁ ) of the eject lever (17) rearward, the engagement portion (14a) of the lock piece (14) and the lock pin (14a) are rotated. 1
When the engagement of (0) is released, the cassette holder (4) is rotated in the forward direction by the biasing force of the torsion spring (7), that is, brought into the open state as shown in FIG. 3A, and the tape cassette C is taken out. You can

In this way, in the lock mechanism L of the present example, the stopper (18) is rotated so as to escape from the lock pin (10) during the locking operation of the cassette holder (4), whereby the cassette holder (4) is locked. ) Can be pushed deeper rearward than the position where it is engaged with the engaging portion (14a) of the lock piece (14), that is, it has an overstroke in the closing direction when the cassette holder (4) is locked. Therefore, even if the both sides of the cassette holder (4) are slightly twisted and the lock pins (10) on both sides are displaced and correspond to each other, the lock pin (10) and the lock piece (14) of the lock mechanism L on both sides are ) Are positively engaged with each other, that is, the lock synchronism of the lock mechanisms L on both sides can be secured, and the cassette holder (4) is locked and held in the normal position.

When the cassette holder (4) is in the locked state, the lock pin (10) is pinched by the engaging portion (14a) of the lock piece (14) and the stopper (18), so that the cassette holder (4) is loose. The tape cassette C is firmly locked with almost no noise, and therefore the tape cassette C is securely held at the predetermined mounting position of the tape drive section on the fixed substrate (2). Since the influence is blocked, the modulation noise is reduced and the sound quality can be improved, and there is no rattling even when the cassette holder (4) is pressed, so the cassette tape recorder as a whole has a high-class feeling and a sense of security in use. It can be generated.

In the present embodiment, an example in which the present invention is applied to a cassette tape recorder in which a tape cassette is mounted and held in a vertical state is shown. However, the present invention is not limited to this, and the tape cassette is mounted and held in a horizontal state. Needless to say, the present invention can be applied to a cassette tape recorder configured to do so.

Further, other individual members can take various forms without being limited to the configuration shown in the present embodiment. Particularly, in the present embodiment, the stopper (18) is formed by the elastic arm portion (19) integrally extending from the upper edge thereof. Although it is rotatably biased, other than this, for example, a torsion spring may be used, or it may be rotatably biased by its own weight without using a biasing member.

Further, although the present embodiment applies the present invention to a cassette tape recorder in which the left and right sides of the cassette holder (4) are locked, the present invention is not limited to this, and one side of the cassette holder (4) is locked. It is obvious that the same effect can be obtained by applying the method to the above.

Further, in this embodiment, the lock piece (14) as the lock member and the stopper (18) are provided on the fixed substrate (2) side, and the lock pin (10) is provided on the cassette holder (4) side. Alternatively, the lock pin (10) may be protruded from the fixed substrate (2) side and the lock piece (14) and the stopper (18) may be disposed on the cassette holder (4) side. It is possible.

Further, in the present embodiment, the lock device of the cassette holder in the cassette tape recorder is shown as an example of the recording / reproducing apparatus, but the present invention is not limited to the cassette tape recorder, and can be applied to various recording / reproducing apparatuses using a cassette-shaped recording medium. Widely applicable.

〔The invention's effect〕

As described above, according to the present invention, in the device that engages and locks the cassette holder in the overstroke state, the lock pin is sandwiched by the lock member and the stopper in the locked state, so that the cassette holder has almost no backlash. It locks firmly without occurring, so
During recording / playback, the cassette can be held securely by cutting off the influence from the outside, which reduces modulation noise and improves the sound quality. The recording / reproducing apparatus as a whole has a great effect in practical use, such as a feeling of luxury and a sense of security in use.

[Brief description of drawings]

FIG. 1 is a perspective view of the device of the present invention, FIG. 2 is an exploded perspective view of the main part of the same, and FIGS. 3A to 3D are side views for explaining the operation. In the figure, (2) is a fixed substrate, (4) is a cassette holder,
(10) is a lock pin, (12) is a lock plate, (14) is a lock piece, and (18) is a stopper.

Claims (1)

(57) [Claims] 1. A cassette holder that is movable in an opening / closing direction with respect to a recording / reproducing apparatus main body, and a lock mechanism including a lock pin and a lock member for locking the cassette holder with respect to the recording / reproducing apparatus main body in a closed state. In the cassette holder locking device, the lock pin and the locking member are engaged to lock the cassette holder when the cassette holder returns from the overstroke state in the closing direction. A locking device for a cassette holder, comprising a stopper member that holds the lock pin between the lock pin and an engaging portion of the lock member when locked.