JPS6019580B2 - Cassette transfer mechanism in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette transport mechanism in a tape recorder.

The purpose of this is to make the slider on which the cassette is mounted and the operating table for advancing the cassette movable relative to each other, and by operating the table, the cassette on the slider moves at twice the operating speed. It is an object of the present invention to provide a cassette transfer mechanism which is movable and has an extremely short table movement distance during operation.

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 lying on its side to a cassette drive mechanism section B located at the back. By being pushed to the back, the slider 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 part 4 made of glass or plastic is integrally attached between the rising parts 2a and 2a'. Slope-shaped protuberances 2b and 2b' that are sloped higher in sequence toward the tip are formed on both sides of the transparent portion 4 in the rear direction, and the slope-shaped protuberances 2b
, 2b', there is a slightly lower and sloped ridge 2b,
Similar to 20, a mirror 5 tilted in the same direction is attached. Reference numeral 2c denotes a bottom portion that is approximately the same size as the cassette A. Guides 2d and 2d' for guiding the slider stand up on both sides of the bottom portion, and furthermore, both sides 2e and 2e' extend toward the back. The rear end 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' supported on the fixed plates 6, 6', and damper rubbers 8, mounted on the rising pieces 6a, 6'a rising from the fixed plates 6, 6'.
8' has a stepped portion 2e. , 2e,' come into contact with each other, thereby stopping the protruding movement.

2g and 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, 10', 11, 11' are pivotally supported at the front and rear parts of each side 2e, 2e'.
Between 0 and 11 and between 10' and 11', thin strips 12 and 12' are wound through springs 22 and 22'. Guide rollers 13 and 13' perform the same function as the guide rollers 7 and 7', and at the same time support the rail portions 2e2 and 2e2' of the sides 2e and 2e' from below.

The guide rollers 13, 13' are pivotally supported by position adjustment plates 14, 14' whose positions in the longitudinal direction can be adjusted with respect to the chassis C through long holes 14a, 14'a.
b, 14'b are the connecting plates 15, 1 of the thin strips 12, 12'.
5' is attached. In addition, the position adjustment plate 14,1
4', the position adjusting plates 14, 14' are provided with holes 14c, 14'c in the form of an isosceles triangle or a regular triangle whose bases are perpendicular to the direction of movement, and holes 14c, 14'c of the same shape are provided in the chassis C. A hole is provided so that the apex of the triangle is located opposite to the apex of the holes 14c and 14'c of the position adjustment plates 14 and 14', so as to overlap with the holes 14c and 14'c, and the overlapping hole is By inserting an adjustment tool such as a screwdriver, the position of the position adjustment plates 14, 14' relative to the chassis C can be adjusted accurately. The strips 12, 12' are also connected to the sides la, 1 of the slider by further connecting plates 16, 16'. Both sides of the rear end of the table 2 and the fixed plate 6,
The springs 17, 17' installed between the table 2 and the table 6' are pulling the table 2 in a direction that causes it to protrude. next,
The slider 1 has a slope-like protuberance 2b, 2b' of the tapered 2 and a cutout part lb for escaping from the mirror 5 at the front end, and a cassette A to be fitted with iron into the cassette mounting part li on both sides of the front end. Standing pieces lc, lc for positioning
' is formed. ld and ld' are holes where the reel pin of cassette A is located, le and le' are guide pieces guided by guides 2d and 2 of table 2, and lf and lf' are the rising pieces lc and lc' and guide piece le. , le' to position the cassette A. Further, 1g, 1g', lh, lh', li, and li' are guide pieces that are sequentially guided by guides 3a and 3a' of the holder 3, respectively. At the rear end of the holder 3, the holder 3 is rotatably supported by a shaft 19 on a fixed plate 18 to the chassis C, and the front end is always given a downward rotational force by a spring 20'. .

In the front part of this holder 3, when the cassette A has entered on the slider 1 when being rolled downward,
Pressing pieces 3b and 3b' are formed to press down. Also,
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, and this printed circuit board 24 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 integral 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 can be rotated around the shaft 30 as a fulcrum, and the push-up portion 29b is located on the bottom surface of the cassette drive mechanism section B. The sliding plate 28 described above is guided by elongated holes 28b and 28c with respect to pins 31 and 32 provided in a shield on 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 floating plate 28. The relief plate 34 is located at a substantially right angle to the chassis C, and has a spring 3 at the bottom.
5, the upper part is slightly tilted forward. The escape plate 34 has a contact piece 34a for the cassette A and a rising piece lf for the slider 1.
''Pressed pieces 34b to be pressed are formed respectively, and a hole 34c through which the chrome cassette detection lever 36 is inserted and presses the stepped portion 36a, and a pressing piece 34d for pushing the erase prevention lever 37 of the cassette A backward. is formed. The erasing lever 37 stands up while being sandwiched between the chassis C and protrudes forward, making it impossible to operate a recording lever (not shown). The chrome cassette detection lever 36 is pushed forward by a spring 38, and in this state a switch (not shown) is actuated to switch the tape recorder circuit to a chrome cassette. As shown in FIGS. 5 and 6, the thin strip 39 connected to the reinforcing portion 2f at the rear of the table 2 is wound around the boule portion 43M of the flywheel 43 of the governor 40 several times, and then wound through the spring 41. Connected to chassis C.

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 provides 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 attached to the cassette attachment part lj of the slider, the cassette A is attached to the table as shown in FIG. 2 slope-like ridges 2b, 2b
''In a state slightly inclined from this, the rising pieces lc, lc'
, lf, lf', and are regulated and positioned by guide pieces le, le'. If the front end of the table 2 is pushed inward in this state, the pulleys 10, 10', 11, 11 at the rear
' is also moved rearward, so that the strips 12, 12', which are fixed to the connecting plates 15, 15' by means of pulleys 11, 11',
is stretched backwards, so this narrow 12,1
The slider 2' connected by the connecting plates 16, 16' is also moved rearwardly. At this time, Hoso 12
, 12' are the moving lengths of the pulleys 11, 11' because both the upper and lower parts of the pulleys 11, 11' are pushed backward at the same time.
In other words, the slider 1 is moved backward by a distance twice the moving distance of the table 2, and therefore the slider 1 is moved backward at twice the speed at which the table 2 is pushed.

During this time, the table 2 moves against the tensile force of the springs 17, 17' while being guided by the guide rollers 7, 7', 13, 13', and the slider 1 moves with its guide pieces 1g, 13'.
g', lh, lh'li, li' are guides 3 of holder 3
a, 3a' and enters the holder 3.

Then, the rising piece lf' 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 erase prevention lever 37 is
, 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 parts 2g, 2g 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' fall into the depressed parts 2g, 2g, and therefore The holder 3 is rotated forward by the action of the spring 20.

At this time, the slider 1 is the guide 3a, 3a' of the holder 3.
Since the holder 3 is guided by the slider 1 and is separated from the bottom 2c of the table 2, the holder 3 rotates with the slider 1 inserted therein. During this rotation, the holder 3 holds the holding pieces 3b, 3b.
''Thus, cassette A installed in slider 1
Press and move the cassette A to the lower cassette drive mechanism section B.
to engage. When the cassette A is properly engaged with the cassette drive mechanism section B, the pressed piece 34b of the relief plate 34 protrudes to the upper surface of the cassette B, so the relief plate 34 returns to its original state, thereby preventing erasure. The lever 37 engages with the closed erasure prevention hole of the cassette A, and 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 thin strip 39 moves in the direction of loosening with respect to the flywheel 43, so that the loosening is immediately absorbed by the spring 41, and the string 39 simply slides against the flywheel 43. Therefore, since flywheel 43 does not rotate, governor 40 does not exhibit its effect. The cassette A assembled into the cassette drive mechanism section B as described above performs recording and playback operations in that state because the tape volume section of the cassette A is irradiated by the lamp 23. The state of the winding portion is reflected on the mirror 21 of the holder 3 and further reflected on the mirror 5 of the table 2.

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 that has been assembled into the cassette drive mechanism section B as described above, the eject 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 pushes the relief plate 34 backward. 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 eject lever 26, the operating piece 26b pushes the pin 29a of the push-up lever 29 upward, causing the cassette push-up lever 29 to rotate upward about the shaft 30. As a result, the push-up portion 29b is connected to the cassette mounting portion li of the slider.
Push the bottom back surface upward, thereby rotating the holder 3 upward. Then, when the rollers 9, 9' of the holder 3 are completely lifted from the depressed parts 2g, 2g' of the table 2,
The table 2 is unregulated and springs 17, 17
It protrudes due to the action of ′. During this ejection, the pulleys 10, 10' pull the strips 12, 12' forward, and the sliders connected to the strips 12, 12' by the connecting plates 16, 16' are moved in the same way as in the case of the above-mentioned approach. Move forward at double speed.

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 le, le', 1g, 1g', lh, lh.
, li, Ii' guides 2d, 2d of table 2
', the guides 3a, 3a'' of the holder 3 are guided. Then, when the stepped portions 2e, 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 has returned to the state shown in FIGS. 1 to 3, and therefore the cassette A has climbed onto the slope-like protuberances 2b and 2b'. Therefore, the protruding cassette A can be easily removed. In the above protruding motion,
Governor 40 performs this function.

That is, at the time when the table 2 starts to protrude, the thin strips 39 become tense and bite into the flywheel 43, trying to rotate the flywheel 43. However, this flywheel 43 has a large inertia, and therefore the protruding force exerted by the springs 17, 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 the above description, the point at which the slider 1 leaves the bottom 2c of the table 2 and descends to the cassette drive mechanism part B by the holder 3, that is, the descending position of the slider 1 relative to the table 2 is adjusted by moving the position adjustment plates 14, 14' back and forth. This can be done by adjusting the movement in the direction.

That is, the position adjustment plates 14, 14' have thin strips 12, 12'.
Connecting plates 15, 15' are attached to fix the ends of the narrow strips 12, 12', so if the position adjusting plates 14, 14' are moved forward by the same distance, the lower portions of the narrow strips 12, 12' will be moved. Pulled forward and thereby the upper part rearwardly, the slider 1, which is fixed to this upper part by means of connecting plates 16, 16', is moved rearwardly by the displacement distance. When the position adjustment plates 14, 14' are moved rearward, the slider moves forward 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. From the above, according to the present invention, since the cassette on the slider moves at twice the speed of the table, the distance the table moves becomes extremely short, and for this reason, the drive mechanism section, which is the playing position of the cassette, is provided at the back. This makes it easier to design the various mechanisms on the front of the tape recorder, and also simplifies the appearance of the front.

[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 sectional view taken along the line mm in Fig. 1, and Fig. 4 is a sectional view of 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...Tafle, 3...Holder, 4... ...Transparent member, 5...Mirror, 6, 6'...Fixing plate, 7,
7'...Guide roller, 8,8'...Dan/f rubber, 9,9'...Roller, 1010'...Pulley,
11, 11'... Pulley, 12, 12'... String, 13
, 13'... Guide roller, 14, 14'...
Position adjustment plate, 15, 15'... Connection plate, 16, 16
'... Connection plate, 17, 17'... Spring,
18...Fixing plate, 19...Shaft, 20...
... Spring, 21 ... Mirror, 22, 22' ... Spring, 23 ... Lamp, 24 ... Printed circuit board, 25 ...
... 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, 4
1...Spring, 42...Shaft, 43. ．．・．． ．．・Flywheel, 44... Viscous agent, 45...
・Fixed plate. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. Includes a slider that moves a cassette mounted laterally, a table that moves the slider, and a holder that holds the cassette that has been moved toward the back by the slider and incorporates it into the cassette drive mechanism. , a pair of pulleys are pivotally supported at the front and rear of the table, a string is suspended endlessly from the pulley, a part of one side of the string is fixed to the chassis, and a part of the other side is fixed to the slider. A cassette transport mechanism in a tape recorder, characterized in that: