JPS6057139B2 - 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 in a tape recorder.

The purpose of this is to provide a reciprocating table that is given a forward protruding force, a slider that holds a cassette that can reciprocate relative to the table, and the table and The slider is mechanically connected to the slider, and the slider is moved by a movement amount larger than the movement amount of the table at the same time as the table is moved by receiving the movement force of the table, and the slider is brought to the playing position and the cassette eject position. In the tape recorder, the tape recorder comprises a double speed moving means for moving the slider to the playing position, and a maintaining means for maintaining the collaborative playing state with the tape recorder when the slider reaches the playing position, the tape recorder is configured to move the installed cassette toward the rear or The resistance when the table is pushed forward is made greater than the resistance when it enters, thereby slowing down the ejection movement when the cassette is ejected without increasing the resistance when the table enters. The object of the present invention is to provide a cassette eject mechanism with improved performance.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The tape recorder in this embodiment has a mechanism for bringing a cassette A in a horizontal position to a cassette drive mechanism section B located at the back. When the slider 1 is pushed to the back, it moves at double speed in the back direction together with the slider 1, and when the holder 3 is inserted into the holder 3, the holder 3 rotates downward and descends into the cassette drive mechanism section B. This will be explained in detail below.

The table 2 has rising portions 2a on both sides at its front end.
, 2a'' are formed, and a transparent member 4 made of glass or plastic is integrally attached between the rising portions 2a, 2a''. Slope-shaped protuberances 2b and 2b'' that are sequentially higher and higher in the distal direction are formed on both sides of the transparent member 4 in the rear direction.
Between b and 2b'', there is a slightly lower and sloped ridge 2b.
, 2b'', a mirror 5 tilted in the same direction is attached. 2c is a bottom portion of approximately the same size as the cassette A, and on both sides thereof are guides 2d for guiding the slider 1, 2d'' stands up, and both sides 2e, 2e'' extend in the rearward direction, and the rear end thereof is reinforced by a reinforcing portion 2f.

This table 2 has a fixing plate 6 to the chassis C,
The movement movement in the front and back direction is guided by guide rollers 7, 7'' pivotally supported by the fixed plates 6, 6'', and damper rubbers 8, mounted on the rising pieces 6a, 6''a rising from the fixed plates 6, 6''.
The protruding movement is stopped by the step portions 2e1, 2e1'' coming into contact with the 8''.

2g, 2g'' are rollers 9 extending on both sides of the front end of the holder 3,
9'' is a depressed part, and 2h is a reinforced part.

On the other hand, on the lower surface of both sides 2e, 2e'' of this table 2, pulleys 10, 1'', 11, 1'' are pivotally supported at the front and rear parts of each side 2e, 2e''. and 11, and between 1'' and 1'', there are springs 22,
The strings 12, 12'' are wound around the strings 12 and 12''. 13
, 13'' are guide rollers which perform the same function as the one guide roller 7, 7'', and at the same time support the rail portions 2e2, 2e2'' of the sides 2e, 2e'' from below.

The guide rollers 13, 13'' are pivotally supported by position adjusting plates 14, 1C whose positions in the longitudinal direction can be adjusted with respect to the chassis C through long holes 14a, 1Ca, and whose pivot shafts 14b,
Connection plates 15, 15'' for the strings 12, 12'' are attached to 1Cb. In order to adjust the position adjustment plates 14, 1C, a Holes 14c, 1Cc having an isosceles triangle or regular triangle with a base are provided in the chassis C, and the holes 14c, 1C have the same shape and the apex of the triangle is in the position adjustment plate 14, 1C.
The hole located opposite to the apex of c is the hole 14c, 1Cc.
By inserting an adjustment tool such as a screwdriver into the overlapping hole, the position of the position adjustment plates 14, 14'' relative to the chassis C can be adjusted accurately.
The strings 12, 12'' are also connected to the sides 1a, 1a'' of the slider 1 by another connecting plate 16, 16''. The springs 17, 17'' installed therebetween are tensioned in the direction of protruding the table 2. Next, the slider 1 at its front end presses against the slope-like protuberances 2b, 2b'' of the table 2.
A notch 1b is formed to escape from the mirror 5, and rising pieces 1c, 1C'' for positioning the cassette A to be fitted into the cassette mounting part 1j are formed on both sides of the front end. 1d, 1d. '' is the hole where the reel pin of the cassette A is located, 1e and 1e'' are the guide pieces guided by the guides 2d and 2d'' of the table 2, and 1f and 1f'' are the rising pieces 1c.
, 1C'' and guide pieces 1e, 1e'' to position the cassette A. Also 1g, 1g''
, 1h, 1h1, 11, 1i'' are guide pieces sequentially guided by guides 3a, 3a'' of the holder 3, respectively. The holder 3 has a fixing plate 1 attached to the chassis C at its rear end.
8 by a shaft 19, and a spring 20 constantly applies a downward rotational force to the front end.

In the front part of this holder 3, when the holder 3 rotates downward, the cassette A that has entered on the slider 1 is
Pressing pieces 3b, 3b'' are formed to press down.
A mirror 21 tilted forward is attached to the reinforcing portion 3c. Reference numeral 23 denotes a lamp that irradiates the tape winding section of the cassette A located in the cassette drive mechanism section B;
3 is attached to a printed circuit board 24, which is suspended from the chassis C by a support plate 25.

Reference numeral 26 denotes an eject lever, which is rotatable about a shaft 27, and has an engaging piece 26a integrated with the eject lever 26.
is opposed to the front part of the rising part 28a of the sliding plate 28 that slides with respect to the chassis C, and another actuating piece 26b
is opposed to the lower surface of the pin 29a of the cassette push-up lever 29.

The cassette push-up lever 29 is rotatable about a shaft 30, and the push-up portion 29b is located on the bottom surface of the cassette drive mechanism section B. The above-mentioned sliding plate 28 is guided by long holes 28b and 28c with respect to pins 31 and 32 implanted in the chassis C, and is normally moved forward by a spring 33. A rising piece 28d that pushes the relief plate 34 backward is formed at the rear of the sliding plate 28. The relief plate 34 is positioned so as to be inserted into the chassis C at a substantially right angle, and its upper portion is slightly inclined forward as its lower portion is pulled rearward by a spring 35. The escape plate 34 has a contact piece 34a for the cassette A and a rising piece 1 for the slider 1.
a hole 34c through which the chrome cassette detection lever 36 is inserted and presses the stepped portion 36a, and a pressing piece 34d that presses the erasure prevention lever 37 of the cassette A backward. The erase lever 37 stands up while being sandwiched between the chassis C and protrudes forward, making it impossible to operate the recording lever (not shown). The detection lever 36 is pushed forward by a spring 38, and in this state, a switch (not shown) is operated to switch the tape recorder circuit to the chrome cassette.It is connected to the reinforcement part 2f at the rear of the table 2. The string 39 is wound several times around the pulley portion 43b of the flywheel 43 of the governor 40, as shown in FIGS. 5 and 6, and then connected to the chassis C via the spring 41.

The governor 40 includes a flywheel 43 rotatably supported on a shaft 42 in which a plurality of circumferential grooves 42a are formed, and a chamber 43a is formed in the bearing portion of the flywheel 43. A viscous agent 44 such as grease that exhibits viscous resistance is sealed between the circumferential grooves 42a. 45 is a fixing plate that fixes the shaft 42 to the chassis C.

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

1 to 3 show the state in which both the slider 1 and the table 2 protrude forward. At this time, when the cassette A is installed in the cassette mounting portion 1j of the slider 1, the cassette A is inserted into the cassette A as shown in FIG. Slope-like protuberances 2b, 2b of table 2
'', the rising pieces 1c, 1C'',
1f, 1f'' and guide pieces 1e, 1e''. If the front end of the table 2 is pushed inward in this state, the pulleys 10, 1'', 11, 11'' at the rear also move rearward, so that the connecting plates 15, 15'' are moved by the pulleys 11, 1''. The strings 12, 12'', which are individually identified by the strings 12, 12'', are stretched rearward, and therefore the slider 1, to which the strings 12, 12'' are connected by the connecting plates 16, 1'', is also pulled rearward. Moving. At this time, the string 12, 12″
Since both the upper and lower parts of the pulley 11,1'' are pushed backward at the same time, the slider 1 is moved backward by a distance that is twice the moving distance of the pulley 11,1'', that is, the moving distance of the table 2. Therefore, this slider 1 moves backward at twice the speed of pushing the table 2.

During this time, the table 2 moves against the tensile force of the springs 17, 1V and is guided by the guide rollers 7, 7'' 13, 13'', and the slider 1 moves its guide pieces 1g, 1〆,
1h, 1h'', 11, 11'' are the guides 3a of the holder 3,
3a'' and enter the holder 3.

Then, the rising piece 1f'' of the slider 1 pushes the pressed piece 34b of the relief plate 34, and pushes the relief plate 34 backward.

For this reason, the erasure prevention lever 3 is
7. The chrome cassette detection lever 36 is pushed backwards and escapes from the cassette A attached to the slider 1. At this point, the depressed portions 2g, 2 of the table 2 are located at the lower ends of the rollers 9, 9'' on both sides of the holder 3, so the rollers 9, 9'' are located at the depressed portions 2g, 2. As a result, the holder 3 is rotated forward by the action of the spring 20.

At this time, the slider 1 is guided by the guides 3a, 3a'' of the holder 3 and is spaced apart from the bottom 2c of the table 2, so the holder 3 rotates with the slider 1 inserted. During movement, the holder 3 has holding pieces 3b, 3b
'' pushes the cassette A mounted on the slider 1 and engages the cassette A with the lower cassette drive mechanism section B. The cassette A is properly connected to the cassette drive mechanism section B.
When the pressed piece 34b of the relief plate 34 is engaged with the cassette B, the relief plate 34 returns to its original state, and the erasure prevention lever 37 moves to the cassette A.
The chrome cassette detection lever engages with the chrome cassette discrimination hole.

In the above-mentioned advancing operation of the cassette A, the governor 40 does not exhibit its effect.

That is, during this operation, the string 39 moves in a direction that loosens it relative to the flywheel 43, so that the loosening is immediately absorbed by the spring 41, and the string 39 only loosens against the flywheel 43. Therefore, since flywheel 43 does not rotate, governor 40 does not exhibit its effect. The cassette A installed in the cassette drive mechanism B as described above performs recording and playback operations in that state, but since the tape volume portion of the cassette A is irradiated by the lamp 23, The state of the tape winding section is reflected on the mirror 21 of the holder 3, and is further reflected on the mirror 5 of the table 2.
will be reflected.

Therefore, by looking into the transparent member 4 of the table 2 from above the tape recorder, the cassette A can be seen through the mirrors 5 and 21.
You will be able to check the condition of the tape winding section. Also,
By changing the shape and size of the mirror 21, the tape winding section can be moved from above the tape recorder to the mirrors 5 and 2 in the same manner as described above.
1, and also from a position approximately horizontally in front of the transparent member 4.
Next, in order to take out the cassette A assembled in the cassette drive mechanism section B as described above, the ejector lever 2 is
Just press 6 downwards.

As a result, the sliding plate 28 is first pushed inward by the engaging piece 26a, and its rising portion 28d touches the relief plate 34! Push backwards. As a result, the pressed piece 34b separates from the cassette A, and both the erasure prevention lever 37 and the chrome cassette detection lever 36 separate from the cassette A. By further pushing the ejector lever 26, the operating piece 26b pushes the pin 29a of the cassette push-up lever 29 upward, causing the cassette push-up lever 29 to rotate upward about the shaft 30. The portion 29b pushes the bottom back surface of the cassette mounting portion 1j of the slider 1 upward, thereby rotating the holder 3 upward.Then, the rollers 9 of the holder 3,
9'' is completely lifted from the depressed parts 2g and 21 of the table 2, the table 2 is released from the restriction and the spring 1 is released.
7, 17''. At the time of this protrusion, the pulley 10, 1'' pulls the string 12, 12'' forward, and the connecting plate 16, 16'' causes the string 12, 12'' to protrude. The connected slider 1 is advanced at twice the speed in the same way as in the case of the above-mentioned approach.

Further, during this protrusion, the table 2 is guided by the guide rollers 7, 7'', 13, 13'', and the slider 1 is guided by the guide pieces 1e, 1e'', 1g, 1g'', 1h,
Guide 2d of table 2 by 1h'', 11,11''
, 2d'' and guides 3a, 3a'' of the holder 3. Then, when the stepped portions 2e1, 2e/ of the table 2 come into contact with the damper rubbers 8, 8'', the table 2 stops its protruding operation. At this time, the slider 1 is in the state shown in FIGS. 1 to 3. 2b, 2b'' and cassette A is now resting on the slope-like protuberances 2b, 2b''. Therefore, the protruding cassette A can be easily removed. In the above-described projecting operation, the governor 40 performs its function.

That is, at the time when the table 2 starts protruding, the string 39 becomes tense and bites into the flywheel 43, trying to rotate the flywheel 43. However, this flywheel 43 has a large inertia, so the protrusion force exerted by the spring 17 is greatly weakened, and the table 2 gradually protrudes. Thereafter, rotational resistance is applied to the flywheel 43 by the viscous agent 44, and the tensile force of the spring 41 is also applied, so that the table 2 eventually protrudes gently. In addition, in the above, the slider 1 is separated from the bottom 2c of the table 2,
Adjustment of the descending position of the slider 1 with respect to the table 2, that is, the point in time when the slider 1 is lowered to the cassette drive mechanism section B by the holder 3, can be performed by moving and adjusting the position adjustment plates 14, 1C in the front-rear direction.

That is, the strings 12, 12'' are attached to the position adjustment plates 14, 14''.
Connecting plates 15, 15'' are attached to fix the ends of the cords 12, 12'', so if the position adjusting plates 14, 1C are moved forward by the same distance, the lower portions of the cords 12, 12'' will move forward, direction, thereby pulling the upper part in the rearward direction, so that the slider 1, which is fixed to this upper part by means of the connecting plate 16,1', moves rearwardly by the displacement distance. When the position adjustment plates 14, 1C are moved backward, the slider 1 is moved forward by the same distance. Therefore,
The relative position of the slider 1 with respect to the table 2 can be adjusted, and the descending position can therefore be adjusted. This adjustment is normally done during assembly. In addition, in the above,
The governor 40 may further include several blades on its flywheel 43, and may also provide frictional resistance between it and the shaft 42.

From the above, according to the present invention, the force at the start of table protrusion is weakened by the flywheel of the governor, and after that, the rotational resistance due to the viscous agent etc. makes the effect obvious, and when the table enters, the string is against the governor. Because it slides, the resistance when the table is pushed out is greater than that when it is moved in, so the table moves slowly, which greatly improves the usability of the product, and it does not interfere with the movement of the table. , there is no risk of impairing operability.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a tape recorder mechanism according to an embodiment of the present invention, Fig. 2 is a side view, Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 4 is a cross-section in a cassette playing state. 5 is a side view of the governor, and FIG. 6 is a sectional view. A...Cassette, B...Cassette drive mechanism section, C...Chassis, 1...Slider, 2...Table, 3. ...Holder, 4...Transparent member, 5...Mirror, 6,6
″... Fixed plate, 7,7″... Guide roller, 8,8″... Damper rubber, 9,9″...
...Roller, 10,1 ``...Pulley, 11,1''
... Pulley, 12,125 ... String, 13,13''
...Guide roller, 14,14"...Position adjustment plate, 15,15"...Connection plate, 16,16"...
・・・Connection plate, 17,17″・・・Spring, 1
8... Fixed plate, 19... Shaft, 20... Spring, 21... Mirror, 22, 22''... Spring, 23... Lamp, 24... Printed circuit board ,2
5...Support plate, 26...Eject lever, 27...Shaft, 28...Sliding plate,
29...Cassette push-up lever, 30...Shaft, 31...Pin, 32...Pin, 33...
・Spring, 34... Relief plate, 35...
Spring, 36... Chrome cassette detection lever, 37... Erase prevention lever, 38...
・Spring, 39...String, 40...Governor,
41... Spring, 42... Shaft, 43...
... Flywheel, 44... Viscous agent, 45...
Fixed plate.

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. , 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; a tape recorder comprising a maintenance means for maintaining cooperative performance with the tape recorder when the slider comes to the performance position, one end of a string is fixed to the table, and the other end of the string is fixed to the table; It is fixed to the chassis via an elastic body such as a spring that is pulled in the direction of entry, and the middle part of the string is wound around a governor, and the governor is given rotational resistance by a viscous agent sealed in the bearing part. A cassette eject buffer mechanism for a tape recorder, characterized by comprising a flywheel.