JPS5815860B2 - Length adjustment section for cassette entry string in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a length adjusting section for a string for entering a cassette in a tape recorder.

The purpose of this is to make it possible to extremely easily adjust the effective length of the string that allows relative movement between the slider on which the cassette is attached and the operating table for advancing the cassette. To provide a length adjusting part of a string for cassette entry, which allows the cassette entry operation to be performed in an optimal state.

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

Reference numeral 1 designates the front panel of the cassette deck main body, which includes a slider 2 into which the cassette A is inserted by a leaf spring 2a, and a table located on the lower surface of the slider 2 and movable relative to the slider 2. An opening 1a is provided so that both of the ejector levers 3 and 3 can project out, and an opening 1b from which the eject lever 4 projects is also provided at the bottom right of the opening 1a when viewed from the front.

On the other hand, inside the cassette deck main body, side plates 6 and 6' are attached to the lower panel 5.
A shaft 7 is fitted between the rear parts of the shafts 7 and 6', and the rear end of the holder 8 is pivoted to the shaft 7. As a result, the holder 8 can be rotated vertically around the shaft 7. It becomes.

Further, the table 3 has no bottom other than the bottom 3a of the protruding portion from the front panel 1 when the table 3 is protruding, and there are side pieces 3b from both sides of the bottom 3a.

3b' extends rearward, and the holder 8
The guide portion 3 that guides the guide rollers 9, 9' on both sides of the
bly 3 b1' is bent into an L-shape, and in the center there is a recess 3b into which the rollers 9, 9' descend.
2, 3b2' are formed, and furthermore, at the rear end, a pulley 1
0 and 10' are pivotally supported, and an L-shaped leaf spring 11.
11' is attached.

In front of the side pieces 3b, 3b', the side plates 6,
L-shaped guide part 63?6a bent on the upper surface of 6'
Guide rollers 12, 12' guided by ' are pivotally supported.

The slider 2 described above has a hole 2b1 into which a reel pin is inserted, a notch 2b2, 2b3 where a cassette position regulating pin and a pinch roller are located, and a cushioning rubber 13, 13' of a table 3 in the mounting part 2b of the cassette A. Upright pieces 2b4.2b4' for regulating the cassette position that collide with each other are formed, respectively.

On both rear sides of the slider 2, guide pieces 2c, 2c', 2d, and 2d' are bent inward to be guided by guide portions 8a and 8a' on both sides of the lower part of the holder 8.

Reference numeral 14 denotes a guide piece 2d at the rear end of the slider 2, whose both ends are connected by springs 26 and 26'.

A string fixed to the lower part of 2a', the center part of which is a pulley i o
, io' and fixed to the holder 8.

Note that this holder 8 is formed with a plurality of adjustment protrusions 8b for adjusting the effective length of the string 14, and after the string 14 is hooked on the hook portions 8 Cl 8 C', one of the hook portions The center portion of the string 14 is fixed by hooking the string 14 from 8c to one of the adjusting projections 8b and then to the central projection 8d.

In order to change the effective length of the string 14, it is sufficient to change the hooking position on the adjustment protrusion 8b.

15.15' is a string for providing a cushioning effect when the table 3 protrudes forward, and one end of this string 15.15' is attached to the leaf spring 11.11' at the rear end of the side pieces 3b and 3b' of the table 3. The other end is fixed to the damper pulleys 16, 16' which are pivotally supported by the side plates 6 and 6', and the other end is connected to the side plate 3.
b, 3b' are fastened to central protrusions 17, 17'.

18 and 18' (one 18 is not shown) are springs installed between the table 3 and the slider 2, and the slider 2 receives a tensile force against the table 3 by these springs 18 and 18'. .

The eject lever 4 described above is slidably guided in the front and back direction by a pin 19, 20 on one side plate 6 of the J plates 6 and 6', and is mounted between the pin 19 and one of the pins 19. The spring 21 normally provides a protruding force.

A suppressing portion 4a is formed at the rear end of the eject lever 4 and is bent into an upwardly sloped shape.

Reference numeral 22 denotes a lever whose lower end is pivotally supported by one side plate 6 and whose upper end is given a counterclockwise rotational force in FIG. A lower shaft 25 of the link lever 24 is pivotally supported.

Therefore, one of the guide rollers 9 has a spring 23
Therefore, the table 3 is always pressed against one guide portion 3b1, and as a result, the other guide roller 9' is also influenced by this and is in a state of being pressed against the other guide portion 3b1'.

Note that the suppressing portion 4a of the eject lever 4 is connected to the lower shaft 2.
It is facing 5.

The curved pieces 8 e + 8 e' on both front sides of the holder 8 have a cassette A inserted by a slider on the lower surface thereof.
A cassette drive mechanism section B, whose entire body is inclined forward, is located below it.

3b3 and 3b3' are regulating pieces that come into contact with the damper boos IJ16 and 16' to restrict the protrusion state when the table 3 completes its □ protrusion, and are bent at both rear ends of the table 3.

Next, the operation in the above configuration will be explained.

1 to 3 show slider 2. Both the table 3 is in a state of protruding forward from the front panel 1 and the front panel 1. At this time, when the cassette A is manually attached to the cassette attachment part 2b of the slider 2, the cassette A is attached to the leaf spring 2a + the upright piece 2 on the front side. b+, 2 b+', 111 part (7) regulated by the upright pieces 2b5, 2b5', and the holes 2b1. Notch”
b2 t 2 It is positioned in the normal state with respect to b3.

In this state, if you push the front of table 3 towards the back,
The pulleys io and io' at the rear end also move backward,
For this reason, the string 14 is stretched backward, and the string 14 causes the slider 2 to which the cassette A is attached to
will also be pulled backwards and move.

At this time, the string 14 extending backward from the shaft 7 is connected to the pulley 10,
The upper and lower portions of each of the pulleys 10 and 10' extend at the same time; therefore, the slider 2 moves backward by a distance twice as much as the moving length of the pulleys 10 and 10', that is, the moving distance of the table 3. , this slider 2 moves backward at twice the speed of pushing the table 3 into the front panel 1;

At this time, the springs 26, 26', 18, 18' act to apply tension to the string 14.

During this time, the table 3 is guided by the guide rollers 12, 12' against the side plates 6, 6';
It is also guided to the holder 8 by 9', and the string 1
5.15' is also guided relative to the damper pulleys 16, 16'.

Although the strings 15 and 15' are used as dampers, they do not act as coins when the cassette A is inserted into the back.

That is, at the time of insertion, a tensile force is applied to the portion of the string 15, 15' between the damper boos IJ16, 16' and the plate pans 11, 11', and as a result, the plate springs 11,
11' is bent, the part between the protrusions 17, 17' of the string 15, 15' and the damper rollers 16, 16' is loosened, so that the string 15, 15' does not bite into the damper rollers 16, 16' and slides. It becomes easy to pass.

Therefore, the force required to push the table 3 is small.

On the other hand, as described above, the slider 2 moves toward the back at double speed with respect to the table 3, but before it starts moving, only the pair of guide pieces 2d and 2d' are connected to the guide portion 8a of the holder 8.
When the movement is completed, the other pair of guide pieces 2Cs2c' are also guided by the guide portions 8a and 8a', and the rear portion of the slider 2 enters into the holder 8.

As described above, when the table 3 moves to the rear, its recesses 3b2, 3b2' are located below the guide roller 9°9'.

Since one guide roller 9 is pulled downward by the spring 23, these guide rollers 9, 9' fall into the recesses 3b2, 3b2'.

Therefore, the holder 8 comes to rotate downward about the shaft 7 as a fulcrum.

At this time, the table 3 is completely pushed into the front panel 1, and the slider 2, which has moved at double speed, has its cassette mounting portion 2b completely separated from the bottom 3a of the table 3.
It will be in a state where it has moved further back.

Therefore, as described above, the guide rollers 9, 9' are connected to the recess 3b.
2, 3b2', the slider 2 is only guided by its guide pieces 2c, 2c', 2d, 2d' by the guide parts 8a, 8a' of the holder 8, so the slider 2 is It will now rotate downward together with the holder 8 degrees.

Therefore, the cassette A mounted on the cassette mounting portion 2b of the slider 2 is attached to the curved portion 8 e s 8 of the holder 8.
It is maintained in a state where it is incorporated into the cassette drive mechanism B while being pushed to e', and then by driving the drive mechanism B, playback or recording becomes possible.

FIGS. 4 to 6 show the above state. Next, in order to take out the cassette A assembled into the cassette drive mechanism section B as described above, the eject lever 4 is pushed.

As a result, the eject lever 4 is guided by the pins 19 and 20 and moves to the back against the tensile force of the spring 21, and the suppressing portion 4a at the rear end pushes the lower shaft 25 to the back.

Therefore, the guide roller 9 is pushed upward from the recess 3b2 via the link lever 24, and as a result, the other guide roller 9' also rises together with the holder 8, and both guide rollers 9.9' Recessed portions 3b2, 3b2'
Becomes free from the lock.

Incidentally, since springs 18 and 18' (one 18 is not shown) are suspended between the table 3 and the slider 2 to provide a tensile force between them, the table 3 in a free state In the case of the slider 2, first the slider 2 moves forward with respect to the table 3, and then the string 14 is pulled forward by this forward movement of the slider 2, so that the pulley 10.10' is pulled forward. As a result, table 3 will also move forward.

In other words, the slider 2 moves at a speed equal to 2 of the forward movement speed of the table 3.
It moves forward at twice the speed and returns to the state shown in FIGS. 1 to 3.

The cushioning rubber 13, 13' performs a cushioning effect at this time.

Further, the table 3 completes its protrusion when the regulating pieces 3b3, 3b3' at the rear end come into contact with the damper pulleys 16, 16'.

Furthermore, when returning in this way, the slider 2 protrudes at twice the speed, so even though the cushioning rubbers 13 and 13' are provided, the usage image of the product is not very good.This is as follows. The problem is solved by a certain action.

That is, at the time of this return, at the start of protrusion,
A large tension acts on the string 15, 15' between the damper pulleys 16, 16' and the protrusion 17°17', and the damper pulleys 16, 16' of the string 15, 15' and the leaf spring 11
．． Since the part between 11' and 11' will not loosen, the string 11.
11' bites into the damper pulleys 16, 16', causing the damper pulleys 16, 16' to rotate.

Therefore, if rotational resistance is applied to the damper boos IJ16, 16', the return force at the start of return will be considerably offset.
Therefore, the table 3 protrudes and moves slowly, and the usability image of the product is extremely good.

Note that this slow movement is caused by the guide rollers 9, 91 being moved by the springs 23 to the guide portions 3b1, 3b of the table 3.
This is also achieved by applying movement resistance to the table 3 by suppressing rotation to b1'.

As described above, according to the present invention, the effective length of the string for moving the slider and the table relative to each other can be easily adjusted.
Not only during assembly, but even when the string is stretched due to use, it can be adjusted, so that the cassette insertion operation can always be performed in an optimal condition.

[Brief explanation of drawings]

Figure 1 is a plan view of the tape recorder mechanism before the cassette tape enters, Figure 2 is its side view, Figure 3 is a sectional view taken along line I-1 in Figure 1, and Figure 4 is after the cassette tape is inserted. FIG. 5 is a plan view of the tape recorder mechanism in this state, FIG. 5 is a side view thereof, and FIG. 6 is a sectional view taken along the line VI--Vl in FIG. 4. A...Cassette, B...Cassette drive mechanism section, 1...Front panel, 1a, 1b...
...Opening, 2...Slider, 2a...
...Plate spring, 2b...Cassette mounting part, 2C1
2C', 2d, 2d'-guide piece 3...
・Table, 3a...Bottom, 3b, 3b'...
...Side piece, 3b1 + 3b1/...Guide part, 3b2, 3b2'...Concave part, 4...
・Eject lever, 4a... Pressing part, 5...
...Bottom panel, 6,6'...Side plate, 6
a j 6 a'...Guide part, 7...
・Shaft, 8...Holder, 8a, 8a'...
...Guide part, 8b...Adjustment protrusion, 8c, 80
'...Hook part, 8d...Central protrusion, 8
e, 8e'...curved piece, 9,9'...
Guide roller, 10, 10'... Pulley, 11,
11'...Plate spring, 12.12'...
Guide roller, 13°13'...Buffer rubber, 1
4...String, 15, 15'...L16,
16'... Damper pulley, 17°17'...
...Protrusion, 18' ... Spring, 19゜2
0...Bin, 21...Spring, 22
...Rubber, 23 ...Spring, 24
...Link lever, 25...Lower shaft, 2
6.26'・・・Spring.

Claims (1)

[Claims] 1. Attach both ends of the string to both rear sides of the slider, which has separate pulleys on both sides of the rear end and can reciprocate relatively in the same direction as the table that can freely reciprocate, and where the cassette tape is attached. The string from above is locked to the front locking part via the pulley, and the locking part includes a projection for hooking the center part of the string, and a part extending from the projection to one of the pulleys to be pulled. A length adjusting part of a string for entering a cassette in a tape recorder, which is formed with a plurality of adjusting protrusions that are selected and hooked as appropriate.