JPH0550551U - Cassette holder lock mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cassette holder locking mechanism that can lock two places on the left and right of a tape recorder without twisting and is not restricted in space. [Structure] The cassette holder 1 is rotatably supported by left and right shafts 1a, and is urged to rotate rightward by a torsion spring 5. A lock plate 3 is slidably supported on the upper surface 1c of the cassette holder 1 to the left and right, and is biased to the left by a spring 4. Holding unit 1 for cassette holder 1
When the tape cassette 11 is inserted into b and the front surface 1f is pushed, the first mountain-shaped portion 3e of the lock plate 3, the second mountain-shaped portion 6d of the slider 6, the inclined portion of the hook 3c and the lock pin 12a.
And abutting each other, and the lock plate 3 slides to the right and the hook 3c passes through the lock pin 12a, the lock plate 3 returns to a predetermined position and the right and left two lock pins 12a and the hook 3c.
Engage. As a result, the cassette holder 1 is locked at two places on the left and right, and held in parallel with the panel 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cassette holder of a tape recorder, and more particularly to a cassette holder locking mechanism suitable for locking the cassette holder without twisting.

[0002]

[Prior art]

 Conventionally, many cassette holder lock mechanisms for cassette tape recorders shown in FIGS. 4 and 5 have been provided.

In the figure, reference numeral 2 is a holding plate spring, which is provided in the holding portion 21b and presses the tape cassette toward the chassis (not shown) at the time of playing. A torsion spring 5 biases the cassette holder 21 in the eject direction (clockwise direction). Reference numeral 21 denotes a cassette holder, which is rotatably supported by shafts 21a provided at the lower portions of both side surfaces, and a holding portion 21b into which a tape cassette (not shown) is inserted and held and a left side portion 21c are engaged with lock levers. A matching protrusion 21d is provided. 21e is the front surface of the cassette holder 21. Reference numeral 22 denotes a lock lever, which is urged by the chassis to rotate itself, and is urged to rotate clockwise by a spring (not shown). Reference numeral 22a is a hook provided on the lock lever 22 and engages with the protrusion 21d to lock the cassette holder 21. Reference numeral 22b is an inclined portion with which the protrusion 21d is in sliding contact. Reference numeral 23 denotes a lock plate on both sides, which is provided with two hooks 23 a that lock both side portions of the cassette holder 21.

The operation of the conventional cassette holder lock mechanism configured as described above will be described. In the first example shown in FIG. 4, the tape cassette is inserted with the opening portion downward into the holding portion 21b of the cassette holder 21 which is in the open position during play.

When the front surface 21e of the cassette holder 21 is pushed, the cassette holder 21 rotates counterclockwise with the shafts 21a provided on both sides as a rotation shaft, and eventually the projection 21d and the inclined portion 22b of the lock lever 22 are separated. Abut. Due to the component force acting on the inclined portion 22b, the lock lever 22 rotates counterclockwise and escapes. When the cassette holder 21 is further rotated and the protrusion 21d passes the hook 22a, the lock lever 22 is rotated clockwise by the rotational biasing force, and the hook 22a of the lock lever 22 and the protrusion 21d are engaged with each other. As a result, only the left side portion 21c of the cassette holder 21 is locked at the play position.

The tape cassette is pressed toward the chassis by the two left and right holding leaf springs 2 and is held at a predetermined position.

At the time of ejecting, by pushing an eject knob (not shown), the eject lever 22 rotates counterclockwise by a link mechanism (not shown). As a result, the engagement between the hook 22a and the projection 21d is released, and the cassette holder 21 is rotated in the eject direction by the rotational biasing force of the torsion spring 5 and stopped at a predetermined position.

Further, during play, a pressing and releasing mechanism (not shown) using a leaf spring pushes the back surface of the tape cassette downward to hold the tape cassette in a predetermined position, and when ejecting, the pressing by the leaf spring is released. Was there.

Further, in another example, by using the both side lock plates 23 shown in FIG. 5, the protrusions 21d provided on both sides of the cassette holder 21 and the left and right hooks 23a are engaged to lock the cassette holder 21. Was there.

[0010]

[Problems to be solved by the device]

 However, the conventional cassette holder lock mechanism described above has the following problems. (1) Since the cassette holder is locked only on one side, the force of the torsion spring twists the cassette holder. (2) Since the cassette holder is locked on only one side as described above, the cassette holder is further twisted by the reaction force of the pressing leaf spring that presses the tape cassette. Therefore, the pressing force cannot be increased. (3) Since the pressing leaf spring cannot be strengthened, the tape cassette may not be held at the proper position during play, and the tape running may become unstable. (4) Since the torsion spring cannot be strengthened as described above, a pressure release mechanism for the leaf spring for the tape cassette rear surface is required, resulting in a significant cost increase. (5) The mechanism with double-sided lock plates shown in Fig. 5 was often unusable due to space limitations.

The present invention has been made in view of the above points, and its object is to solve the drawbacks of the conventional example, to lock two right and left positions without twisting, and to restrict space. There is no cassette holder locking mechanism in place.

[0012]

[Means for Solving the Problems]

 The cassette holder lock mechanism of the present invention is a cassette holder for a tape recorder that rotatably supports a cassette holder that holds a tape cassette in a play position and urges the cassette holder to rotate in a cassette eject direction, and locks the cassette holder in a play position by a lock plate. In the lock mechanism, the lock plate is slidably supported on the upper surface of the cassette holder in the left-right direction and is biased to one side by a spring, and the lock plate faces the inside of the cassette holder. Two projecting left and right lock claws and a first mountain-shaped part formed at the end on the side of the one side, and a lock pin provided on the main body so as to engage with the lock claws, and a lock pin that operates during an eject operation. A slider that is supported so that it can be pushed back freely and that is urged by a spring toward the front of the cassette holder, and the lock provided on this slider. With the second mountain-shaped part that abuts against the first mountain-shaped part of the lock plate and operates this lock plate, the cassette holder is locked at two positions on the left and right by the lock claws of the lock plate during play. It was done.

[0013]

According to the present invention, since the lock plate is provided on the upper surface of the cassette holder and the lock claws are provided at two positions on the right and left sides of the lock plate, the lock pin is engaged with the lock pin provided on the main body. When the holder is pushed in, the cassette holder is locked at two places on the left and right, and held at the play position.

At the time of ejection, by pushing the slider, the lock plate slides to the other side of the cassette holder, and the engagement between the lock claw and the lock pin is released. As a result, the cassette holder is rotated by the urging force of the torsion spring to open to a predetermined position and stop.

[0015]

【Example】

 An embodiment of the cassette holder lock mechanism according to the present invention will be described with reference to FIGS. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

In the figure, reference numeral 1 denotes a cassette holder, which is rotatably supported by shafts 1a provided on the lower portions of both side surfaces and is biased by a torsion spring 5 so as to be rotated in the eject direction. The left and right pins 1d that slidably support the lock plate are provided on the holding portion 1b and the upper surface 1c that are held by the lock. Further, like the cassette holder 21 of FIG. 4, the holding portion 1b is provided with the holding leaf springs 2 at two places on the left and right. 1e is a left side surface and 1f is a front surface.

Reference numeral 3 denotes a lock plate. Pins 1d are fitted in the two long holes 3a on the left and right sides, and are slidably supported on the upper surface 1c of the cassette holder 1 in the left-right direction, and further, the spring hook 3b and the upper surface 1c are provided. It is urged toward the left side surface 1e by a spring 4 stretched over. Reference numerals 3c are hooks provided at two positions on the right and left sides of the lock plate 3, and engage with lock pins to lock the cassette holder 1 at the play position. 3d is an inclined portion provided on the hook 3c portion. Reference numeral 3e is a first mountain-shaped portion provided on the left end portion of the lock plate 3, and has inclined portions 3f and 3g.

Reference numeral 6 denotes a slider supported by the cassette mechanism so that it can be pushed back, and is biased by a spring 7 toward the front surface 1f of the cassette holder 1. The arm portion 6a protruding upward has inclined portions 6b and 6c. The second mountain-shaped portion 6d provided with is provided so as to contact the first mountain-shaped portion 3d to operate the lock plate 3. 6e is an engaging protrusion that engages with the interlock plate. An eject knob 8 is attached to the tip of the slider 6 and slightly protrudes from the front surface 1f of the cassette holder 1.

Reference numeral 9 denotes a mechanical chassis that drives the tape stored in the tape cassette 11. Reference numeral 10 denotes an interlock lever, which is rotatably supported on the left end portion of the chassis 9 and is rotated counterclockwise at the time of play by a link mechanism (not shown) so as to engage with the engaging protrusion 6e of the slider 6. Engage. In the modes other than the play mode, the spring (not shown) is rotated by the clockwise urging force so as not to engage with the engaging projection 6e.

Reference numeral 12 is a sub-panel, and two lock pins 12a that engage with the two right and left lock claws 3c of the lock plate 3 are erected downward. Reference numeral 13 denotes a panel, which is attached to the sub-panel 12 and constitutes the front surface of the cassette tape recorder.

The operation of the cassette holder lock mechanism of the present invention constructed as above will be described. At the time of playing, the tape cassette 11 is inserted into the holding portion 1b of the cassette holder 1 in the open position with the opening portion facing downward.

When the front surface 1f of the cassette holder 1 is pushed toward the chassis 9, the cassette holder 1 rotates counterclockwise with the shafts 1a provided on both sides as a rotation shaft, and eventually the left end portion of the lock plate 3 is rotated. The slanted portion 6b of the second mountain-shaped portion 6d provided on the slider 6 contacts the slanted portion 3g of the first mountain-shaped portion 3d formed in the above, and the two left and right hooks 3c of the two left and right hooks 3c are attached to the two lock pins 12a. The inclined portion 3d also abuts substantially at the same time.

As a result, the lock plate 3 slides rightward and escapes due to the component force acting on the inclined portion 3g and the two inclined portions 3d. When the cassette holder 1 is further rotated so that the inclined portion 3g passes the inclined portion 6b and the two lock pins 12a pass through the two hooks 3c, the lock plate 3 is moved leftward by the urging force of the spring 4. It slides back, and the lock pin 12a and the hook 3c are engaged with each other. Here, the cassette holder 1 stops and is locked in parallel with the panel 13 at two left and right positions and held in the play position. Further, the tape cassette 11 is pressed toward the chassis 9 by the two left and right pressing leaf springs 2 and is held at a predetermined position.

At the time of ejecting, the slider 6 slides by pushing the eject knob 8, and the slanted portion 6c of the second mountain-shaped portion 6d and the slanted portion 3f of the lock plate 3 come into contact with each other, so that the lock plate 3 is affected. The lock plate 3 slides to the right by the force. As a result, the engagement between the lock pin 12a and the hook 3c is released, and the cassette holder 1 is rotated in the eject direction by the rotational biasing force of the torsion bar 5 and stopped at a predetermined position.

When the eject knob 8 is released, it is returned to its original position by the urging force of the spring 7 stretched on the slider 6. Further, during play of the tape, the interlock lever 10 and the engaging projections 6e of the slider 6 are engaged with each other so that the eject knob 8 does not operate even if it is pushed and does not eject.

At the time of playing, the back surface of the tape cassette 11 was pressed downward by a leaf spring (not shown) to hold the tape cassette 11 at a predetermined vertical position.

[0027]

[Effect of the device]

 Since the cassette holder locking mechanism according to the present invention is configured as described above, it has the following effects. (1) Since the cassette holder is locked at two places on the left and right, it is parallel to the panel, and the cassette holder is not twisted by the force of the torsion spring or the reaction force of the holding plate spring. (2) Since the pressing leaf spring can be strengthened as described above, the tape cassette can be held at an appropriate position and the tape running can be stabilized. (3) Since there are no restrictions on space, it can be used for all mechanisms. (4) Since the torsion spring can be strengthened to increase the rotational biasing force of the cassette holder, the leaf spring release mechanism for pressing the back surface of the tape cassette is not required, and the cost can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cassette holder according to a cassette holder locking mechanism of the present invention.

FIG. 2 is a side view showing the same mechanism.

FIG. 3 is a top view showing the same mechanism.

FIG. 4 is a perspective view showing a first example of a conventional cassette holder lock mechanism.

FIG. 5 is a perspective view showing a double-sided lock plate in another example of the mechanism.

[Description of symbols] 1 cassette holder 1a shaft 1b holding portion 1c upper surface 1d pin 1e left side surface 1f front surface 2 holding plate spring 3 lock plate 3a long hole 3b spring hook 3c hook 3d inclined portion 3e first mountain-shaped portion 3f, 3g Inclined part 4 Spring 5 Torsion spring 6 Slider 6a Arm part 6b, 6c Inclined part 6d Second mountain shaped part 6e Engagement protrusion 7 Spring 8 Eject knob 9 Chassis 10 Interlock plate 11 Tape cassette 12 Sub-panel 13 Panel

Claims (1)

[Scope of utility model registration request] 1. A cassette holder lock mechanism for a tape recorder, wherein a cassette holder, which is rotatably supported and holds a tape cassette at a play position, is rotationally biased in a cassette eject direction and is locked at a play position by a lock plate. The lock plate, which is slidably supported in the left-right direction on the upper surface of the cassette holder and is biased to one side by a spring, and the left and right two lock plates that project toward the inside of the cassette holder. A lock claw and a first mountain-shaped portion formed at the end portion on the side of the one side, a lock pin provided on the main body so as to engage with the lock claw, and a lock pin that is operable during an eject operation and can be pushed back. A slider biased by a spring toward the front of the cassette holder, and a slider that is provided on the slider and abuts against the first mountain-shaped portion of the lock plate. A cassette holder locking mechanism, characterized in that the cassette holder is configured to be locked at two positions on the left and right by the locking claws of the locking plate at the time of playing, with the second mountain-shaped portion that operates the locking plate.