JP3227882B2 - Cassette mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mounting mechanism applied to a cassette tape recorder or the like.

[0002]

2. Description of the Related Art FIG. 1 shows a cassette tape recorder for a so-called DAT (digital audio tape). The cassette tape recorder 1 includes a tape recorder main body 2 and a lid 3 rotatably connected to the tape recorder main body 2. The lid 3 opens and closes a cassette mounting portion 4 of the tape recorder main body 2. You. 5
Is a hub drive shaft provided in the cassette mounting portion 4.

Reference numeral 6 denotes a cassette holder for holding a tape cassette. The cassette holder 6 is configured to move up and down in conjunction with the opening and closing operation of the lid 3, that is, in a state where the lid 3 is open (shown in the figure). In the state (2), the cassette holder 6 is at an elevated position with respect to the cassette mounting section 4 so that the tape cassette can be inserted and removed. When the lid 3 is closed, the cassette holder 6 is moved to the cassette mounting section It is designed to descend to the position where it is attached to.

[0004] When the lid 3 is completely closed,
The lid 3 is locked by engaging with a lock piece 7 provided on the tape recorder main body 2 side. Reference numeral 8 denotes an open switch for releasing the lock.

[0005]

In the cassette tape recorder constructed as described above, a holding mechanism (click stopper mechanism) for holding this state with a predetermined force when the lid 3 is opened is provided. However, if a downward force is applied to the cassette holder 6 when the tape cassette is inserted into or removed from the cassette holder 6, the lid 3 may be closed if this force overcomes the force of the holding mechanism. become.

When the lid 3 is closed when the tape cassette is inserted or removed in this manner, the tape cassette or members in the tape recorder main body 2 may be damaged, and a finger may be pinched by the lid 3. is there.

The present invention has been made to solve such a problem.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cassette mounting portion on which a tape cassette is mounted, a lid provided to open and close the cassette mounting portion, and a rotating body mounted on a main body chassis. A first rotatable arm rotatably provided on the main body chassis, a second rotatable arm rotatable integrally with the lid, and a first rotatable arm in which a tape cassette is inserted and held. A cassette holder supported by the rotating arm and moved up and down with respect to the cassette mounting portion by rotating the first rotating arm in conjunction with the rotation of the second rotating arm by opening and closing the lid; When the lid is in an open state, a coupling mechanism that couples to each other by engagement between an elongated hole formed in one of the first rotation arm and the second rotation arm and an engagement pin provided in the other, One of the long holes with which the engagement pins engage When the lid is in the open state, the first rotating arm is transmitted to the second rotating arm via the bent portion as the first rotating arm rotates in the closing direction. The force is configured to act in a direction different from the direction in which the second pivot arm pivots in the lid closing direction.

[0009]

With the above construction, in the mechanism of the present invention, the lid does not close even if a downward force is applied to the cassette holder with the lid open, so that the tape with respect to the cassette holder is not closed. When the cassette is inserted or removed, it is possible to prevent an accident that the lid is closed and the tape cassette or the like is damaged or the hand is pinched.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 10 denotes a mounting board which constitutes a main body chassis which supports the entire cassette mounting mechanism, and the mounting board 10 is a tape recorder main body 2.
The mounting substrate 10 is vertically mounted on a fixed chassis (not shown). A first rotating arm 11 is turned on the front end of the mounting substrate 10 via a pivot pin 12 in the vertical direction. A second pivot arm 13 is pivotally supported at the rear end of the mounting substrate 10 via a pivot pin 14 so as to face the rear end of the mounting substrate 10 so as to be able to pivot vertically. I have.

A cover 3 for opening and closing the cassette mounting portion is fixed to the second rotating arm 13, that is, the second rotating arm 13 is integrated with the opening and closing of the cover 3. It is designed to be turned.

The second rotating arm 13 and the first rotating arm 11 are connected to each other via a connecting mechanism so as to rotate in conjunction with each other. The second hole is formed in the distal end of the moving arm 11.
An engaging pin 16 protruding from the tip of the turning arm 13 is engaged, and the turning force of the second turning arm 13 accompanying the opening / closing turning operation of the lid 3 is applied to the engaging pin 16. The first rotation arm 11 is configured to be symmetrically rotated with respect to the second rotation arm 13 by being transmitted to the first rotation arm 11 via the long hole 15.

The mounting board 10, the first rotating arm 11, and the second rotating arm 13 are provided symmetrically on both the left and right sides, respectively.
And 13 are integrally connected by a connecting plate 13a.

The first left and right rotating arms 11 and 11
A cassette holder 6 for holding the tape cassette 100 is supported between the cassette holders 6, that is, the cassette holder 6.
Are pivotally connected to the substantially central portions of the left and right first pivot arms 11 via pivot pins 17 on both left and right side surfaces thereof, whereby the first pivot associated with the opening and closing operation of the lid 3 is performed. The cassette holder 6 is moved up and down with respect to the cassette mounting portion in accordance with the vertical rotation of the arm 11.

The cassette holder 6 is provided with a guide pin 18 at a projecting portion projecting therefrom, and the pin 18 is movable along a guide groove 19 formed in the mounting substrate 10 in a vertical direction. , Whereby the cassette holder 6 is supported so as to move up and down while maintaining a horizontal state.

Further, a pair of leaf springs 20 are provided on the upper surface of the cassette holder 6 on the left and right sides. The leaf springs 20 have a first spring portion 20a projecting downwardly, that is, into the inside of the cassette holder 6, and a slope upward. Projecting second spring portion 20
b, and the tape cassette 10
In a state where the tape cassette 100 is inserted, the tape cassette 100 is pressed by the first spring portion 20a in the cassette holder 6 so as not to rattle. When the cover 3 is closed, the back side of the cover 3 is a second spring. Part 20b, and
The cassette holder 6 is held down by the elasticity of the spring portion 20b, and the tape cassette 100 is securely mounted on the cassette mounting portion.

The DAT tape cassette 100 used here is provided with a lid 101 for closing and opening the tape-exposing portion on the front surface thereof, which can be opened and closed in a vertical direction about a shaft 102 as a fulcrum. In the state of this lid 1
01 is closed so that the tape cassette 10
The tape that appears at the front of 0 is protected.

When the cassette is mounted, the lid 101
At the upper edge of the mounting substrate 10 as a mechanism for opening the mounting plate 10, a projecting piece 21 is provided in a horizontal direction at a position corresponding to the front end of the lid 101 when the tape cassette 100 is inserted into the cassette holder 6. When the cassette holder 6 is lowered from the raised position, the lower end of the front end of the lid 101 abuts on the projecting piece 21 so that the lid 101 is opened (upward) with the shaft 102 as a fulcrum. The tape T is exposed at the front surface of the tape cassette 100 so as to face the rotary head drum 22.

In the cassette mounting mechanism of the present embodiment configured as described above, even when a downward force is applied to the cassette holder 6 in a state in which the lid 3 is opened and the cassette holder 6 is at the raised position, the lid 3 is not moved. To prevent it from closing,
A special structure is adopted for the coupling mechanism.

That is, in this structure, first, the distal end 15a of the long hole 15 provided in the first rotating arm 11 is formed to be inclined and bent so as to have a concave step upward (in the opening direction of the lid 3). When the lid 3 is completely opened, the engaging pin 1 is attached to the distal end 15a as the bent portion.
6 are engaged (see FIG. 2).

In this state, when a downward force is applied to the cassette holder 6 when the tape cassette is inserted or removed, the first rotating arm 11 attempts to rotate downward,
Is engaged with the tip portion (bent portion) 15a of the long hole 15, so that the lid 3 is not closed. That is, in this case, when the first rotating arm 11 attempts to rotate downward, the second rotating arm 13 is moved from the distal end (bent portion) 15 a of the long hole 15 of the first rotating arm 11. Engagement pin 16
Is applied in the direction of the pivot pin 14, which is the fulcrum of rotation of the second rotating arm 13, that is, it does not become a force in the direction of rotating the second rotating arm 13 downward. ,
The lid 3 does not close.

Further, in this structure, when the lid 3 is opened and the cassette holder 6 is raised, this state is held by a predetermined force as a mechanism for holding the state at a foremost end of the first rotating arm 11. Are provided, and correspondingly, an engagement hole 24 as a recess is formed in the second rotating arm 13.
When the lid 3 is completely opened and the engaging pin 16 is engaged with the distal end portion 15a of the long hole 15, the convex portion 23 is engaged with the engaging hole 24 so that the click is performed. The lid 3 functions as a stopper so that the open state of the lid 3 is maintained.

As the holding mechanism, a projection 23 is provided on the second rotating arm 13 side, and an engaging hole (recess) 24 is formed on the first rotating arm 11 side. You may.

The holding mechanism is not limited to the above-described engagement structure of the convex portion and the concave portion. For example, the first rotating arm 11 or the second rotating arm
A torsion coil spring is disposed at a pivot portion of the first rotation arm 11 or the second rotation arm 1 by the force of the spring.
The open state of the lid 3 may be held by urging the upper part 3 to rotate upward.

By providing the holding mechanism as described above,
Even when a slight backlash or impact is applied with the lid 3 opened, the engaging pin 16 does not come off from the distal end portion 15a of the long hole 15, so that a downward force is applied to the cassette holder 6. Even if it is added, the state where the lid 3 is not closed is reliably maintained. When the cover 3 is closed, the holding force of the cover 3 by the holding mechanism, that is, in this example, the protrusion 2
By pushing down the lid 3 in the closing direction against the engaging force of the engagement hole 3 and the engagement hole 24, the engagement between the projection 23 and the engagement hole 24 is forcibly released and the lid 3 is closed. (In the case of a holding mechanism using the force of a spring, the lid 3 may be pressed down and closed against the force of the spring). In the closing operation of the lid 3, the engaging pin 16 of the second rotating arm 13 is disengaged from the tip 15a of the elongated hole 15 without any trouble, and the lid 3 is closed smoothly.

Further, in the cassette mounting mechanism of the present embodiment, when the tape cassette 100 is mounted, the sweeper 2 for preventing the tape T exposed on the front surface from running down on the rotary head drum 22 as the tape cassette 100 is lowered.
5 are provided.

The sweeper 25 is pivotally mounted on a support plate 26 fixed across the left and right mounting boards 10 and 10 so as to be rotatable in the horizontal direction via a pivot 27 at a position immediately above the rotary head drum 22. It is supported, and is configured to be rotated in accordance with the closing operation of the lid 3.

That is, the operation mechanism of the sweeper 25 includes an operation piece 28 pivotally supported by a support plate 26 so as to be vertically rotatable.
And a connecting wire 30 for connecting the turning plate 29 and the sweeper 25 so as to be pivoted in a horizontal direction in conjunction with the operation piece 28. Is closed, the connecting plate 13 of the second rotating arm 13 is closed.
a pressing portion 31 provided on a part of the rotary plate 29 and the connecting wire 30
, The sweeper 25 is rotated. Further, when the lid 3 is opened and the pressing of the operation piece 28 is released, the operation piece 28, the rotating plate 29 and the sweeper 25 are returned to the initial position by the force of the return spring 32. I have.

When the tape T exposed on the front surface of the tape cassette 100 is loosened in the direction of the rotary head drum 22 by rotating the sweeper 25 in conjunction with the closing operation of the lid 3 as described above. However, the slack tape T is swept by the tip portion 25a of the sweeper 25 to prevent the tape T from running on the rotary head drum 22, so that the tape T is not damaged.

As described above, in the cassette mounting mechanism of this embodiment,
By providing a safety mechanism for preventing the tape T from being damaged by running on the rotary head drum 22 when the tape cassette 100 is lowered, a highly reliable cassette tape recorder can be provided.

Although the embodiment of the present invention has been described above, the present invention is not limited to the configuration of this embodiment. For example, in the embodiment, an elongated hole 15 is provided in the first rotating arm 11, and the elongated hole 15 is formed in the second rotating arm 13.
The first rotating arm 1 is provided with an engaging pin 16 to be engaged with the
The first and second rotating arms 13 are connected to each other, but the relationship is reversed. That is, an elongated hole 15 is provided on the second rotating arm 13 side, and an engagement pin is provided on the first rotating arm 11 side. 16 may be provided.

[0032]

As described above, according to the cassette mounting mechanism of the present invention, the lid does not close even if a downward force is applied to the cassette holder with the lid open. A cassette tape recorder that is easier to use for the user because the lid closes when the tape cassette is inserted into and removed from the holder, which can prevent damage to the tape cassette or cassette tape recorder body or pinching fingers with the lid. There is an effect that can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cassette tape recorder.

FIG. 2 is a side view of the cassette mounting mechanism of the embodiment, showing a state when a lid is opened.

FIG. 3 shows a state where the lid is closed.

FIG. 4 is a plan view of a main part of the cassette mounting mechanism according to the embodiment;
This is the state when the lid is opened.

FIG. 5 shows a state when the lid is closed.

[Explanation of symbols]

 Reference Signs List 3 lid 6 cassette holder 10 mounting board (body chassis) 11 first rotating arm 13 second rotating arm 15 long hole 15a tip (bending portion) 16 engaging pin 22 rotating head drum 23 convex portion 24 Hole (recess) 25 Sweeper 100 Tape cassette

Claims (4)

(57) [Claims] 1. A cassette mounting part on which a tape cassette is mounted, a lid provided to open and close the cassette mounting part, a first rotating arm rotatably provided on a main body chassis, and the main body chassis A second pivot arm rotatably provided on the first lid and a second pivot arm pivoted integrally with the lid; and a tape cassette inserted and held therein and supported by the first pivot arm. A cassette holder which is raised and lowered with respect to the cassette mounting portion by rotating the first rotating arm in conjunction with the rotation of the second rotating arm by the opening and closing; and the first rotating A connecting mechanism that connects the long holes formed on one of the arm and the second rotating arm with an engaging pin provided on the other, and a connecting mechanism that connects the cover when the lid is in an open state; Pin engages A bent portion formed at one end of the long hole, wherein when the lid is in an open state, the first rotary arm rotates in the lid closing direction and the first rotary arm passes through the bent portion through the bent portion. A cassette mounting mechanism wherein the force transmitted to the second rotating arm acts in a direction different from the direction of rotation of the second rotating arm in the lid closing direction. 2. The apparatus according to claim 1, further comprising: the first rotating arm and the second rotating arm.
2. The cassette mounting mechanism according to claim 1, further comprising a holding mechanism that holds the lid in an open state by engaging a convex portion provided on one of the rotating arms with a concave portion provided on the other. 3. 3. A holding mechanism for holding the lid in an open state by a spring mechanism for urging the first rotating arm or the second rotating arm in an upward direction of the cassette holder. Item 2. A cassette mounting mechanism according to Item 1. Further, the cover is rotatably provided on the main body chassis disposed on the lid side of the rotary head drum provided on the cassette mounting portion, and rotates in conjunction with a closing operation of the lid. When the cassette holder is lowered in conjunction with the lid closing operation of the lid, the sweeper is rotated on the lid side of the rotary head drum to be exposed on the front surface of the tape cassette. 2. The cassette mounting mechanism according to claim 1, wherein the tape is prevented from running on the lid of the rotary head drum.