JPS6019579B2 - Cassette eject buffer mechanism in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette ejection 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.

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 3 which is located on the underside of the slider 2 and is attached to the slider 2 and is movable relative to the slider 2. A closing portion la is provided so that both can be ejected, and a closing portion l from which the eject lever 4 protrudes also from the lower right side when viewed from the front of the opening la.
b is provided.

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 ends 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 about 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 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 locking pieces 11, 11' are attached. In front of the side pieces 3b, 30, guide rollers 12, 12' guided by L-shaped guide portions 6a, 6a' formed by bending on the upper surfaces of the side plates 6, 6' are pivotally supported. . The slider 2 described above is the mounting part 2 of the cassette A.
In the part b, there is a hole 20 into which the reel pin is inserted, notches 2Q and 2 where the cassette position regulating pin and pinch roller are located, and an upright piece for regulating the cassette position that guards against the buffer rubber 13 and 13' of the table 3. 2b4 and 2Q' 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. 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.

The holder 8 is formed with a plurality of adjustment protrusions 8b for adjusting the effective length of the string 14, and after hooking the string 14 on the hooks 8c and 8c', one of the hooks 8
Hang the thin 14 from c on one of the adjustment protrusions 8b,
By hooking on the central projection 8d, the central portion of the string 14 becomes fixed. To change the effective length of Thin 14,
It is only necessary to change the hooking position on the adjustment protrusion 8b. 15,15
' is a string that provides a cushioning effect when the table 3 protrudes forward, and these thin strings 15 and 15' are attached to the side pieces 3 of the table 3.
A damper pulley 16 whose one end is fixed to the locking pieces 11, 11' at the rear end of b, 3b' and is pivotally supported from there to the 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 separate tension from the table 3 by these springs 18 and 18'. ing.

The eject lever 4 described above is slidably guided in the front and rear direction by pins 19 and 2 on one of the side plates 6 and 6', and is mounted between the two pins 19. A protruding force is normally applied by the spring 21.

A pressing portion 4a is formed at the rear end of the eject lever 4 and has a zero bend in the shape of an upward slope. 2
Reference numeral 2 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
As a result, the guide roller 9' of the table 3 is always pressed against one guide portion 30 of the table 3, 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 portions 3b and 3'. Note that the pressing portion 4a of the eject lever 4 is
It faces the lower shaft 25. The bent pieces 8e and 8e' on both front sides of the holder 8 are for pressing the cassette A inserted by the slider on the lower surface thereof, and below them is a cassette talker whose entire body is inclined forward. Lateral portion B is located.

3&, 3b3' are regulating pieces that come into contact with the damper pulleys 16, 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, the slider 2 and the table 3 are both projected forward from the front panel 1. At this time, when the cassette A is manually attached to the cassette attachment portion 2b of the slider 2, the cassette A is the leaf spring 2a, the front upright piece 2b4, 2&
', regulated by the side upright piece 2 wide, 2b5', hole 2b
, , is positioned in a normal state with respect to the notch portion 2Q, 2 wide. In this state, push the front of table 3 towards the back
When it is pushed in, the pulleys 10 and 10' at the rear end also move backward,
For this reason, the thin strip 14 is extended rearward, and the slider 2 to which the cassette A is attached is caused by the thin strip 14.
will also be pulled backwards and move. At this time, the string 14 extending rearward from the shaft 7 simultaneously stretches the upper and lower parts of the pulleys 10 and 10'.
The slider 2 is now moved backwards by a distance of 10', that is, twice the distance of movement of the table 3.
Therefore, the slider 2 moves backward at twice the speed at which the table 3 is pushed into the front panel.

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 2, 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, 15' by the damper pulleys 15, 15'. ′ is also guided.

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 the slider 2 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 2c and 2c' 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 back, its recesses 3b2, 2Q' are located below the guide rollers 9, 9', and at this time, one of the guide rollers 9 is pushed downward by the spring 23. Since the guide rollers 9, 9' are under tension, their recesses 3b2, 3
It begins to fall within Q'. Therefore, the holder 8 comes to rotate downward about the shaft 7 as a fulcrum. At this time, table 3 is completely pushed into the front panel.
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, as described above, the guide rollers 9, 9' are in the recess 3Q.
, 3b2', the slider 2 is only guided by its guide pieces 2c, 2c', 2d, 2 by the guide parts 8a, 8a' of the holder 8, so that the slider 2 is not attached to the holder. 8 and rotates downward.

Therefore, the cassette A mounted on the cassette mounting portion 2b of the slider 2 is pushed by the bent portions 8e, 8e' of the holder 8 and is incorporated into the cassette drive mechanism B, and then the drive mechanism B is inserted into the cassette drive mechanism B. By driving it, 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 201 and moves to the back against the tensile force of the spring 21, and the pressing portion 4a at the rear end becomes zero so as to push 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' Recess 3
4, 3b2' becomes released. 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 and slider 2, first set table 3
The slider 2 moves forward, and then the slider 2 moves forward, pulling the narrow 14 forward, pulling the pulleys 10, 10' forward, and the table 3 also moves forward. It becomes like this. That is, slider 2
moves forward at twice the forward movement speed of the table 3, and returns to the state shown in FIGS. 1 to 3. Buffer rubber 13,
13' performs a buffering action at this time. In addition, the table 3 has regulating pieces 3b3 and 3b3' at the rear end that are connected to the damper pulley 16.
, 16', the protrusion is completed. Furthermore, when returning in this way, the slider 2 protrudes at twice the speed, so even if the cushioning rubbers 13 and 13' are provided, the usage image of the product is not very good, but this will be explained next. The problem is solved by the mechanism shown in Figure 7.

FIG. 7 is a detailed sectional view of the vicinity of one damper pulley 16, in which the damper pulley IJ16 is driven by a propeller shaft 27, and a propeller 28 is attached to the end of the propeller shaft 27.
is installed. And the propeller 28 is
A propeller shaft 27 is disposed in a case 29 in which a viscous liquid is sealed and is pivotally supported in a water disintegrated state.
This case 29 is fixed to the side plate 6. 3
0 is a coil spring that is continuously attached to the collar portion 16a of the damper pulley 16 and the propeller shaft 27.

Here, the damper boule 16 and the propeller shaft 27 are integrated by a coil spring 30, but if the coil spring 30 is rotated clockwise when viewed from the right side in FIG. 7, it will loosen and rotate counterclockwise. If the coil spring 30 is oriented in the direction that it will tighten if the damper pulley 16 and the propeller shaft 27 are
It functions as a type of reversing clutch, disengaging when rotated clockwise and engaging when rotated counterclockwise.

Therefore, if the damper pulley 16 is made to rotate clockwise when pushing the table 3 and rotate counterclockwise when the table 3 is pushed in, only the damper pulley 16 will rotate idly when the table 3 is pushed in, but when it is pushed out, , propeller 28
When the damper pulley 16 rotates, it receives resistance from the viscous liquid in the case 29, and a large load is applied to the rotation of the damper pulley 16, causing the table 3 to protrude slowly. Note that the other damper pulley 16
' has exactly the same configuration and operates in the same way. In addition, in this Fig. 7, the propeller 28 is rotated in a viscous liquid in order to provide rotational resistance, but the propeller shaft 27 is made to slide in some way to provide port contact resistance. In other words, the propeller shaft 27 may be a rotation resistance member.

From the above, according to the present invention, the resistance when the table is extended is greater than the resistance when the table is advanced, so the protrusion movement of the table is slow, which greatly improves the usability image of the product, and does not interfere with the pushing operation. 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. A plan view of the tape recorder mechanism in the state, FIG. 5 is a side view thereof, FIG. 6 is a sectional view taken along the line W- in FIG. 4, and FIG.
The figure is a sectional view of the damper pulley. A: Cassette, B: Cassette drive mechanism, 1: Front panel, la, lb: opening, 2: Slider, 2a: plate Spring, 2b...
Cassette mounting part, 2c, 2c', 2d, 2d'...
Guide piece, 3...Tafle, 3a...Bottom, 3b, 3b'
...Side piece, 3b,,3b,'...Guide part, 3b2,3
b2'... Recess, 4... Eject lever, 4a... Pressing part, 5... Bottom panel, 6, 6'... Side plate, 6a, 6
...Guide part, 7...Shaft, 8...Holder, 8a, 8
...Guide part, 8b...Adjustment protrusion, 8c, 8c'...
...Hook part, 8d...Central protrusion, 8e, 8
e'...Rent piece, 9,9'...Guide roller, 10,1
0'... Pulley, 11, 11'... Locking piece, 12, 12'... Guide roller, 13, 13'...
...Buffer rubber, 14...String, 15,15'...
... String, 16, 16' ... Damper pulley, 16
a...Shaft part, 17, 17'...Protrusion, 18
'... Spring, 19, 20... Pin, 21
... Spring, 22 ... Lever, 23 ... Spring, 24 ... Link lever, 25 ... Lower shaft, 26
, 26'... Spring, 27... Propeller shaft, 28... Propeller, 29... Case, 30... Coil spring. Aoi - Figure 2 - Aoi - Figure 3 - Figure 7 - 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 mechanically connecting the table and the slider. , receiving the moving force of the table and moving the slider simultaneously with the movement of the table by a movement amount greater than the movement amount, all sliders playing positions;
A tape recorder comprising a double-speed moving means for bringing the slider to the cassette eject position, and a maintaining means for maintaining a cooperative performance state with the tape recorder when the slider reaches the performance position. The central part of a string with one end fixed to the center part and the other end fixed to the central part is wound around a damper pulley, and the damper pulley is connected to or connected to a rotation resistance member depending on the rotation direction by a spring fitted to its shaft part. A cassette eject buffer mechanism characterized in that the cassette eject buffer mechanism is cut off.