JPS6045964A - Braking device of cassette deck - Google Patents

Abstract

PURPOSE:To stop simply and properly tape travelling and to reduce the whole size of a cassette deck by providing the titled device with a stopping member for stopping the rotation of a reel shaft and an interrupting member for interrupting selectively the stopping operation of the stopping member, selectively. CONSTITUTION:The braking device of the cassette deck has a stopping lever 33 supported on the back end sides of both reel shafts 5, 6 so as to be freely moved in the forward and backward directions. The stopping lever 33 is always excited to the reel shaft 5, 6 sides by a spring 34 and also slidably supported in the forward and backward directions of a body frame 1 by the engaging pin 35 and the leading end 28b of a holding lever 28. The engaging part 27b of an engaging lever 27 is opposed to an engaging pin 29c of an interrupt lever 29 with a prescribed interval. Such a constitution makes it possible to stop simply and properly the tape travelling and reduce the whole size of the cassette deck.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a brake device for stopping tape running as necessary in a cassette deck.

[Prior art]

Generally, in this type of cassette deck, the tape is
Play operation for recording or playback and fast forwarding! 11 (FF) and Retv) operations to travel at desired speeds and directions, and stop operations at desired travel positions. By the way, such a brake device that stops the running state of the tape by a stop operation operates in close connection with the tape running drive device.
Conventionally well-known devices use a plunger or the like independently as the drive source, and therefore it is necessary to incorporate at least two or more plungers into the cassette deck, including one on the tape running drive device side. However, there are problems in that the number of parts is large, the structure is complicated, and it is impossible to downsize the cassette deck due to space considerations.

In addition, conventional devices generally have a structure in which the stop portion that stops the tape reel shaft is directly driven by the urging force of a spring or the like and the suction force of the plunger, so that a large force is applied to the suction force of the plunger. However, a large device with high power consumption had to be used, which caused problems in terms of space and cost.

[Summary of the invention]

The present invention was made in view of these circumstances, and
A single plunger that also controls the operation of the tape running drive bag fi side is used, and the stopping member is selectively stopped in conjunction with the running state of the tape through a simple lever mechanism. This makes it possible to easily and appropriately operate the stop member with a small plunger that consumes little power, and the overall configuration is simple, making it possible to achieve a reduction in the size of the cassette deck. brake equipment.

〔Example〕

The present invention will be explained in detail below using embodiments shown in the drawings.

FIG. 1 shows an embodiment of a brake device for a cassette deck according to the present invention. First, the entire cassette deck will be explained using FIG. 1 and FIGS. To briefly explain the schematic configuration, reference numeral 1 in the figure
is the main frame of the cassette deck, and on the lower side of the rear end there is assembled a support bracket 4 on which a main motor 2 for running the tape in the playing state and a reel motor 3 for fast forwarding and rewinding the tape are mounted. is fixed.

5.6 is a supply side and a supply side arranged in parallel so as to protrude upward from an opening 8 formed in the center of the main body frame 1 corresponding to a mounting part for a cassette tape (indicated by reference numeral 7 in FIG. 3); The reel shaft on the take-up side has a gear 51LJa and is rotatably supported on a lower frame (not shown). At the front side edge of the opening 8 of the main body frame 1 and below it, a flywheel 1 receives rotational transmission from a rotating shaft (not shown) of the main motor 2 via a belt 9.
0 is rotatably supported, and a transmission gear 11 for transmitting the rotation is provided above it.

Further, a plurality of protruding pieces 12 are protruded from the flywheel 10 at predetermined intervals in the circumferential direction, and when the flywheel 1o rotates, they engage with a latch cam, which will be described later, to put the tape running drive device into a play state. It plays a role in making it work. Note that 13 in the figure is a capstan that also serves as the rotation axis of the flywheel 10. Further, reference numeral 14 is coaxially supported with the flywheel 1° on the main body frame 1 so as to be swingable, and at its tip is the transmission gear 1.
1, and is rotated together with the lever 14 toward the winding side reel shaft 6 by an engagement protrusion of a driven plate, which will be described later, which engages with the lever piece 14a of the lever 14 during the pre-f operation of the tape. An intermediate gear 15 that meshes with the gear 6a is supported.

On the other hand, at the center of the rear side edge of the main body frame opening 8, a boot U 17 which receives rotation transmission from the reel motor 3 through a belt 16 is rotatably supported. Above is a gear 1 that rotates integrally with this.
8 is pivoted. An intermediate gear 19 that meshes with this gear 18 is supported at the tip of a swing lever 2° that is rotatably supported on a support shaft 17a, and the reel motor 3 is rotationally driven to rotate the reel shaft 5. , 6 gear 5a
.

6a to rotate one of the reel shafts 5, 6 to fast-forward or rewind the tape.

Further, on the upper and lower surfaces of the front end of the main body frame 1, there is a head mounting plate 23 provided with a head 21 attached to the cassette tape 7, a pinch row 222, etc., and this head mounting plate 23 is connected to the rotation of the flywheel 10. Driven plates 24 that slide in conjunction with the drive are each f
It is slidably supported on the f1 reel shaft 5°6 side so that it can move forward and backward. These drawing plates 23 and 24 are connected by a spring 25, and the protruding piece 12 of the flywheel 1o, which rotates during play operation, engages with a latch cam 26 that is pivotally supported on the driven plate 24, thereby causing the plate 24 to rotate. By being moved toward the reel shaft 5.6, the head mounting plate 23 is also moved in the same direction via the spring 25, and the head 21 and the like are attached to the cassette tape T.

Here, as shown in tJJ21Z and FIG. 3, the latch cam 26 has a first retaining portion 26a that normally faces and engages within the rotation locus of the protruding piece 120 of the flywheel 10, and 1 protruding piece 12 to the retaining part 26a
When this latch cam 26 moves to the reel shaft 5.69111 together with the driven plate 24 due to the engagement of
a, has a second retaining portion 26b, and a support shaft 28c.
c is rotatably supported on the driven plate 24 via
In addition, the long groove 1a bored in the main frame 1 of the driven plate 24 also protrudes upward and engages with the lever piece 14a of the swing lever 14 and further with the engagement #28a of the holding lever 2B, which will be described later. Engagement protrusion 24. is bent and formed, and extends from the - side in the direction of the reel shafts 5 and 6 to form a blocking lever of the brake device (-29, which will be described later).
It has a retaining part 24b that engages with 9a. In addition, in the figure, 30 is a pin that supports the drawing board 23, 24 in a slidable manner, 31. ．． 31b is a long groove into which these pins 30 are fitted, and 32 is a guide pin for the cassette tape 7 that is erected on the main body frame 1.

Now, according to the present invention, the cassette deck having the above-mentioned structure is characterized in that the brake device for stopping the reel shaft rotation of 5° and 60° by a stop operation is configured as follows. .

That is, 33 in the figure is a rack 33 that stops the rotation of both reel shafts 5 and 60 by being placed at the rear end of both reel shafts 5 and 6.
B, 33a is formed. This stop lever 33 is always biased toward the reel shaft 5.6 by a spring 34, and has an engaging pin 35 that protrudes downward and is fitted into the length Q1bK of the main body frame 1, and has a notch at its front end. The holding lever 28 is slidably supported on the main body frame 1 by the tip 28b of the holding lever 28 that fits into the rectangular notch 33b.

Here, the holding lever 28 is attached at its tip (i28b is the spindle 1 of the pulley 1T that receives rotational transmission from the reel motor 3).
7. and the engagement groove 28 on the rear end side engages with the protruding piece 24a of the driven plate 24, so that the main body frame 10 can slide in the front-rear direction similarly to the stop lever 33. Supported. When the holding lever 28 is moved toward the stop lever 33 as the driven plate 24 moves due to the play operation, the tip 28 is moved toward the stop lever 33 side.
8b comes into contact with the bottom of the notch 33b, and this lever 3
3 of the stop lever 33 to the rear of the frame 1 against the spring 34, as shown in FIG. are separated from the gears 5ae6a of each reel shaft 5, 6 to allow their rotation.

Further, the long groove 29b of the blocking lever 29 is fitted into a supporting shaft 36 protruding from the lower side of the main body frame 1 in the vicinity of the stop lever 33. It is supported so as to be rotatable and movable in the front-rear direction of the main body frame 10. This blocking lever 29 has an engaging pin 29e that engages with a retaining portion 27b provided on one side edge of the engaging lever 2T, and a medium-sized watch as shown in FIG. It has an engagement w29a that engages with the retaining pin 35 of the stop lever 33 to move it in the stop release direction when the stop lever 33 is rotated in the stop direction. In addition, 37a in the figure
By engaging the lever tip 29e of the blocking lever 29, the TJ! b It is a stopper pin that regulates the amount.

Further, in the figure, 38 is a plunger attached to the right side of the rear end of the main body 7 frame 1 and swings the engagement lever 21;
The piston 38. Vinyl/38b at the tip is engagement lever 2
It fits into a long groove 27c bored at the other end of the T. Here, a notch 27d is formed in a portion of the engaging lever 27 adjacent to the engaging portion 27bK, and when the blocking lever 29 is pressed rearward by the driven plate 24 during the play operation, the plunger 38, even if the locking lever 2T rotates clockwise in the figure, the engagement pin 2qc
It is configured so that it does not engage with the In addition, 27etj
.

This is a support shaft that rotatably supports the engagement lever 2T on the main body frame 1.

In such a configuration, the operations of each part during play, stop, fast forward, and rewind operations are as follows.

FIG. 2 shows the rack 33 of the stop lever 33. , 33a are driven by the spring 34, and the gears 5ate & 33a of each reel shaft 5, 6 are
Indicates a stop state in which the shaft engages with the shaft and stops its rotation.
At this time, the plunger 38 is in a non-operating state, so that the retaining lever 2T is moved to its retaining portion 2 as shown in the figure.
7b is the engagement pin 2 of the blocking lever 29! lc at a predetermined interval, and its locking piece 27& does not engage with the second retaining portion 26b of the latch cam 26, but rather engages the first retaining portion 26a of the latch cam 26 with the flywheel 10.
This latch cam 26 is only pressed clockwise in the figure so that it faces within the rotation locus of the protruding piece 120. Further, the driven plate 24 is maintained in a state separated from the reel shaft 5.6 together with the head mounting plate 23 shown in FIG. positioned.

When a play operation is performed in this state and the flywheel 10 is rotated clockwise in the figure, the protruding piece 1
2 engages with the first retaining portion 2B of the latch cam 26, causing the latch cam 26 and the driven plate 24 to move upward in FIG. Board 2
4, the holding lever 2B is moved in the same direction by the engaging protrusion 24°, and the tip 28.4 is moved in the same direction. to move the stop lever 33 to the reel shaft 5.
, 6. Further, when the latch cam 26 is moved, the second engagement portion 26b is moved to the engagement lever 27.
The locking piece 27a holds each member in the play state as shown in FIG. 3, and the retaining portion 24b
is one side edge 29. of the blocking lever 29. is pressed so that the engagement pin 29c of the blocking lever 29 engages the engagement portion 2 of the engagement lever 27.
It is ranked as 7b and non-coherent state. Therefore, the plunger 38 is not operated at all at this time.

The rotation of the flywheel 10 is controlled by its transmission gear 11.
It is clear that the cassette tape T is transmitted through the intermediate gear 15 that meshes with the take-up side reel shaft 60 gear 6a, and the play run of the cassette tape T is performed. At this time, it will be easily understood that the first engagement M26alt of the latch cam 26 has moved out of the rotation trajectory of the protruding piece 12 of the flywheel 10.

Further, in the play state shown in FIG. 3 described above, a stop operation is performed, one pulse is sent to the plunger 38, and the piston 38. When the lever 27 is reciprocated, the locking piece 27 of the engagement lever 27 is rotated clockwise. is disengaged from the second engaging portion 26b of the gear wheel 26, whereby the driven plate 24 returns to the initial position together with the head mounting plate 23 and the holding lever 28, and the intermediate gear 15
The second winding is removed from the side gear 6a and its rotation transmission is stopped.

Then, the stop lever 33 released from the restraint by the holding lever 28 is moved to its rack 33 by the spring 34.
33. mesh with the gear 5a v Ra of each reel shaft,
The rotation will be appropriately and reliably stopped.

Also, at this time, the retaining pin 29c of the blocking lever 2g that moves to the reel @5°6 side together with the driven plate 24 is engaged not with the engaging portion 27b of the engaging lever 2T, but with this C (adjacent notch 127d). and that state is maintained, and the stop lever 3
It is configured so as not to interfere with the stopping operation of step 3. Then, when the plunger 38 returns to the non-operating state, the engagement lever 2
711m2 Return to the state shown in the diagram.

Further, in the state shown in FIG. 2, if a fast forward or rewind operation is performed, the plunger 38 is operated by a hold signal and maintains the state. and,
When the plunger 3B enters the absorbing state in this manner, the engagement lever 2T rotates clockwise in the figure, as shown in FIG.
1. Rotate the blocking lever 2B counterclockwise in the figure, press the engagement pin 35 of the stop lever 33 with its engagement portion 29d, and move the stop lever 33 against the spring 34. In addition to operating to release the stopped state,
It functions to prevent the stop operation in that state. At this time, the tape running drive system including the driven plate 24 does not operate at all, only the rotation transmission system from the reel motor 3 operates, and the intermediate gear 19 is connected to the gear 5a' or the gear 5a' of either reel shaft. 6a to run the tape in the fast forward or rewind direction. When this operation is completed and the plunger 3B becomes inactive, the stop lever 33 is moved toward the reel shaft 5°6 by the spring 34 and stops its rotation.

In this case, the fast-forwarding and rewinding operations, such as rewinding, take a relatively short time compared to other operations, and there is no need to prepare a plunger 38 that large.

Therefore, according to the brake device having such a configuration, the blocking lever 29 that engages with the stop lever 33 that stops each reel shaft 5, 6 is rotatable and movable, and is thereby swung by the shiba plunger 3B. Since the stop lever 33 and each reel shaft 5, 6 are connected to each other by selecting engagement or non-engagement with the engagement lever 27,
Only one plunger 38 is required, and the structure is simple and can be made small and compact.

Further, the attraction force of the plunger 3B only needs to be enough to hold the stop lever, and the plunger 3B can be small and consume little power.

It should be noted that the present invention is not limited to the structure of the embodiments described above, and it is easily understood that the shape, structure, etc. of each part including the tape running drive device can be modified and changed as appropriate.

〔Effect of the invention〕

As described above, the cassette deck brake device according to the present invention includes a blocking member that selectively blocks the stopping operation of the stopping member that stops the rotation of the reel shaft, and a blocking member that operates in conjunction with the plunger operation to prevent this. The movement of the stop member is controlled by using a retaining member associated with the member, and by operating the blocking member so as to engage or disengage the retaining member in accordance with the tape running state. Despite its simple and inexpensive configuration, tape running can be stopped easily and appropriately.Furthermore, only one plunger is required for the entire cassette deck, and it is possible to use a small plunger with low suction power. This is highly effective in reducing the size of the entire cassette deck.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of essential parts showing an embodiment of a cassette deck to which a brake device according to the present invention is applied, and FIGS. 2 to 5 are explanatory diagrams for explaining the operation thereof. 5.6 Cloudy...Reel axis, 1...Cassette tape,
10... flywheel, 12... protruding c, 2
4.Φ... Driven plate, 24 colors... Excellent engagement protrusion, 24b
...Engagement part, 25...Spring, 26.
@Latch cam, 27--Engagement lever (retention member),
27b...Engaging portion, 27d--completely missing, 28. ,
・, Holding lever, 29 Φ... Blocking lever (blocking member)
, 29°...Fist long groove, 29c...e, engagement pin, 29
d...9 engaging part, 33, Yu'...stop lever (stop member) -33a@...working rack, 34@-Φ, spring, 35Φ...engaging pin, 36...e11 support shaft , 38・
III Plunger.

Claims (1)

[Claims] A stop member that stops the rotation of the reel shaft, a blocking member that selectively blocks the stopping operation of the stopping member, and an 8 that operates in conjunction with the plunger operation and is associated with the blocking member.
and an engaging member, which is positioned in a non-engaging state with the engaging member when the blocking portion is released or the tape is played, and is engaged with the retaining member during the stopping operation to prevent the stopping operation of the stopping member. A cassette deck is configured such that the engaging member engages the stopping member to prevent the stopping operation during fast forwarding and rewinding operations. Brake device.