JPS6019578B2 - Cassette eject buffer mechanism in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette eject buffer mechanism for a tape recorder.

The purpose of this is to make the resistance at the time of ejection of the table, which allows the loaded cassette to enter the back or project it forward, to be greater than the resistance at the time of entry, thereby increasing the ejection action at the time of ejecting the cassette. To provide a cassette eject buffer mechanism that slows down the load and improves the usability image of the product.

Hereinafter, one embodiment of the present invention will be described 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 3 located on the lower surface of the slider 2 and movable relative to the slider 2. A closing portion la is provided so that both can be projected, and a closing portion lb from which the eject lever 4 projects is also provided at the lower right of the opening la when viewed from the front.

On the other hand, inside the cassette deck body, side plates 6 and 6' are attached to the lower panel 5.
, 6' is iron-mounted between the rear parts of the shafts 7 and 6', and the rear bridge of the holder 8 is pivoted to the shaft 7. As a result, the holder 8 can be rotated in the vertical direction with the shaft 7 as a fulcrum. It is possible.

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 in a protruding state, and side pieces 3b and 3 extend rearward from both sides of the bottom 3a. , guide rollers 9 on both sides of the holder 8
, 9' are bent into an L-shape, and the rollers 9, 9' are bent at the center.
Recesses 3b2 and 3Q' are formed in which the arrow ``1'' descends, and furthermore, at the rear end, the pulleys 10, 10' are pivotally supported, and the L
Letter-shaped leaf springs 11, 11' are attached.

In front of the side pieces 3b, 3b', the side plates 6,
L-shaped guide portions 6a, 6a bent on the upper surface of 6′
Guide rollers 12, 12' are pivotally supported. The slider 2 described above has a hole 20 into which the reel pin is inserted, a notch 2Q in which the cassette position regulating pin and the pinch roller are located, in the mounting portion 2b of the cassette A.
Upright pieces 2b4 and 2b4' for regulating the cassette position which abut against the buffer rubber 13 and 13' of the table 3 are respectively formed.

On both sides of the rear end 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. 14 has springs 26, 26' at both ends.
through the guide pieces 2d, 2d at the rear end of the slider 2.
'A string fastened to the lower part, the center part of which is connected to the pulleys 10, 10.
' and is 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 thin strip 14, and after hooking the thin strip 14 on the hook parts 8c and 8c', one of the chicken pulling parts 8
By hooking the thin strip 14 from c to either of the adjusting projections 8b and then hooking it onto the central projection 8d, the center portion of the thin strip 14 becomes fixed. In order to change the effective length of the string 14, it is sufficient to change the hooking position on the adjustment protrusion 8b. 15,1
Reference numeral 5' denotes a string for providing a cushioning effect when the table 3 protrudes forward, and one end of these thin strings 15, 15' is fixed to the leaf springs 11, 11' at the rear ends of the side pieces 3b, 30 of the table 3. , a damper pulley 16 pivotally supported from there to side plates 6, 6'.
, 16', and the other end is wrapped around the side pieces 3b, 3b'.
It is fixed to the 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'. ing. The eject lever 4 described above has pins 19 and 20 on one side plate 6 of the side plates 6 and 6'.
'Thus, it is slidably guided in the front-back direction, and a protruding force is normally applied by a spring 21 mounted between one of the pins 19.

A pressing portion 4a is formed at the rear end of the eject lever 4 and is bent into an upwardly sloped shape. 22
is a lever whose lower end is pivotally supported by one side piece 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
As a result, the other guide roller 9' is also influenced by this and is in a state where it is pressed by the other guide part 3b,'. Note that the pressing portion 4a of the eject lever 4 faces the lower shaft 25. The pressing pieces 8e and 8e' on both front sides of the holder 8 are for pressing the cassette A inserted by the slider 2 on the lower surface thereof.
Below that, a cassette drive mechanism section B, whose entire structure is tilted forward, is located.

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

Next, the operation of the above configuration will be explained. Figures 1 to 3
The figure shows a state in which both the slider 2 and the table 3 protrude forward from the front panel 1. At this time, when a cassette A is manually installed in the cassette installation part 2b of the slider 2, the cassette A is attached to the leaf spring 2a, Standing pieces 2b4, 2b4'
, the side upright pieces 2 are regulated by 2b5', and the holes 2b,
, are positioned in a normal state with respect to the notches 2b2 and 2b3.

In this state, if you push the front of table 3 towards the back,
The pulleys 10, 10' at the rear end also move rearward, so that the slender 14 is stretched rearward, and therefore this slender 1
4, the slider 2 to which the cassette A is attached is also pulled rearward and moved.

At this time, the string 14 extending backward from the shaft 7 is connected to the pulley 10,
Since the upper and lower portions of each of the pulleys 10' extend at the same time, the slider 2 will move backwards by a distance that is twice the travel distance of the pulleys 10 and 10', that is, the travel distance of the table 3. This slider 2 comes to move backward at twice the speed at which the table 3 is pushed into the front panel 1.

At this time, the springs 26, 26', 18, 18' act to apply tension to the thin strip 14. During this time, the table 3 is guided by the guide rollers 12, 12' against the side plates 6, 6', by the guide rollers 9, 9' also against the holder 8, and further by the damper pulleys 16, 16 by the thin strips 15, 15'. ′ is also guided.

Threads 15 and 15' are for dampers, but do not function when the cassette A is inserted into the back.

That is, at the time of insertion, a tensile force is applied to the narrow portions 15, 15' between the damper pulleys 16, 16' and the leaf springs 11, 11', and therefore the leaf springs 11, 1
1' is operated, the part between the protrusions 17, 17' of the thin strips 15, 15' and the damper rollers 16, 16' is loosened, so that the strings 15, 15' do not bite into the damper rollers 16, 16' and do not slide. I come to do it. Therefore table 3
Only a small amount of force is required to push it in. 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 guided by the guide parts 8a and 8a' of the holder 8. ,
When the movement is completed, the other pair of guide pieces 2c and 2C' are also guided by the guide portions 8a and 8a'', and the rear part of the slider 2 enters into the holder 8.

As described above, when the table 3 moves to the rear, its recesses 3b2, 3Q' are positioned below the guide rollers 9, 9', and at this time, one guide roller 9 is moved downward by the spring 23. , the guide rollers 9, 9' are pulled into the recesses 3b2, 3b.
It begins to fall within Q'. 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,
In addition, the slider 2 that has moved at double speed moves to its cassette mounting portion 2.
b is completely separated from the bottom 3a of the table 3 and moved further back.

Therefore, when the guide rollers 9, 9' fall into the recesses 3, 3b2' as described above, the slider 2 has its guide pieces 2c, 2c', 2d, 2d' of the holder 8's guide portion 8a, Since the slider 2 is only guided by the holder 8a', the slider 2 rotates downward together with the holder 8.

Therefore, the cassette A mounted on the cassette mounting section 2b of the slider 2 is maintained in a state where it is assembled into the cassette drive mechanism B with the award song sections 8e, 8e' of the holder 8 also being pressed, and then the drive mechanism By driving B,
Playback or recording is 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 moves to the back while being guided by the pins 19 and 2M against the tensile force of the spring 21, and the pressing 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 3Q via the link lever 24, and as a result, the other guide roller 9' also rises together with the holder 8, and both guide loaves 9, 9' The locking in the recesses 3Q and 3b2' becomes released. By the way, table 3
Since springs 18 and 18' (one 18 is not shown) are suspended between the table 3 and the slider 2, which provide a tensile force between them, the table 3 is in a free state.
In the case of the slider 2, the slider 2 first moves forward relative to the table 3, and then, as the slider 2 moves forward, the thin strip 14 is pulled forward, and the pulleys 10, 10
' begins to be pulled forward, and table 3 also begins to move forward.

That is, 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 buffer rubbers 13, 13' provide a buffering effect at this time. In addition, the table 3 has regulating pieces 3b3 and 3b at the rear end 0.
3' comes into contact with the damper pulleys 16, 16', the protrusion is completed. In addition, when returning in this way, since the slider 2 protrudes at double speed, the buffer rubber 13, 13'
Even if the product is installed, the usage image of the product will not be very good, but this problem can be solved by the following operation.

That is, at the time of this return, at the start of protrusion,
A large tension acts on the narrow parts 15, 15' between the damper pulleys 16, 16' and the protrusions 17, 17', and the damper pulleys 16, 16' of the thin parts 15, 15' and the leaf spring 11
, 11' will not loosen, so the thin 11,
11' bites into the damper pulleys 16, 16' and rotates the damper pulleys 16, 16'.

Therefore, even though rotational resistance is applied to the damper pulleys 16, 16', the return force at the start of return is considerably canceled out, so that the table 3 slowly protrudes and moves, resulting in an extremely good usability image of the product.

Note that this buffering operation is performed when the guide rollers 9, 9' are moved by the springs 23 to the guide portions 3b, 3 of the table 3.
This is also done by applying movement resistance to the table 3 by pressing and rotating it in the directions b,'. FIG. 7 is a detailed sectional view of one of the damper pulleys 16. This damper pulley 16 consists of two rollers 6a and 16b pressed together by a spring 28 on the shaft 27 of the side plate 6, and between the pulleys 16a and 16b. The adhesion resistance agent is interposed, and the thin 1
5 is suspended on the outer pulley 16b.

One of the pulleys 16a is non-rotatable and can move only in the direction of the shaft 27, and the other pulley 16b is rotatable, but the guide portion 30 of the table 3 is in sliding contact with its peripheral surface. There is. As a result, when the table 3 is pushed in, the thin strip 15 is loosened and the thin strip 15 is loosened as described above.
5 slides on the pulley 16b, the damper pulley 16 only provides resistance for one of the pulleys 16b to slide on the guide portion 3 wide and sliding resistance on the narrow 15. Therefore, there is no abnormal pushing resistance on the table 3. Does not occur.

However, when the table 3 protrudes, the thin strip 15 bites into the pulley 16b as described above, so the table 3 protrudes while rotating the pulley 16b.

- Since the IJ 16a is in pressure contact with the spring 28 and the contact surface is coated with an adhesive resistance agent, a large load is applied to the rotation of the pulley 16b, so that the table 3 protrudes slowly. Become. Note that the other damper pulley 16' has exactly the same structure and operates in the same manner.

From the above, according to the present invention, the resistance when the table is extended is greater than the resistance when the table is inserted, so the protrusion movement of the table is slow, and the usability image of the product is greatly improved.Moreover, there is no hindrance to the pushing operation. Therefore, there is no risk of impairing operability.

[Brief explanation of the drawing]

Figure 1 is a plan view of the tape recorder mechanism before the cassette tape enters, Figure 2 is a side view thereof, Figure 3 is a sectional view taken along line mm in Figure 1, and Figure 4 is after the cassette tape is inserted. 5 is a side view of the tape recorder mechanism in the state, FIG. 6 is a sectional view taken along the line of FIG.
The figure is a sectional view of the damper pulley. A...Cassette, B...Cassette drive mechanism section,
1...Front panel, la, lb...opening section, 2...slider, 2a...plate spring, 2b...cassette mounting section, 2c, 2c'...2d, 2d'. ...Guide piece, 3...Tafle, 3a...Bottom, 3b, 3b'...Side piece, 3b,, 3b'...Guide part, 3b2, 3Q'...
・...Concavity, 4...Eject lever, 4a...
・...Press part, 5...Bottom panel, 6, 6'...Side plate, 6
a, 6a'...Guide part, 7...Shaft, 8...Holder,
8a, 8...Guide part, 8b...Adjustment protrusion, 8c, 8
c'...Neck part, 8d...Central projection,
8e, 8e'...bent piece, 9,9'...guide roller,
10. , 10'... Pulley, 11, 11'...
...Plate spring, 12, 12'...Guide roller, 13, 13
'...Buffer rubber, 14...String, 15,
15'...String, 16,16'...Damper pulley, 16a, 16b...Pulley, 17,17'...
...Protrusion, 18'...Spring, 19,20...Pin,
21...Spring, 22...Lever, 23...Spring, 24...Link lever, 25...Lower shaft, 26,2
6'...Spring, 27...Shaft, 28...Spring. Figure 2 Figure 2 Aoi Figure 3 Shigeru A Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A reciprocating table that is given a forward protruding force, a slider that holds a cassette that can reciprocate relatively in the same direction as the table, and a mechanical connection between the table and the slider. , double-speed moving means for moving the slider by an amount larger than the movement of the table simultaneously with the movement of the table in response to the movement force of the table, and bringing the slider to the performance position and the cassette eject position; and a maintenance means for maintaining a collaborative performance state with the tape recorder when the slider reaches the performance position, one end of which is connected to the rear of the table via an elastic member, and the other end is connected to the center of the table. A cassette eject shock absorbing mechanism characterized in that the central part of a fixed string is wound around a damper pulley and rotational resistance is imparted to the damper pulley.