JPS5914817B2 - tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder, in which the tape running path is devised so that the height dimension of the tape recorder can be shortened, and the tape can be easily mounted. be.

・o Conventionally, a tape recorder, particularly a tape recorder shown in FIG. 1, which is capable of reciprocating recording and playback, has been known.

In the figure, 1a and lb are reel stands, and different reels 2a and 2b can be attached to these reel stands, respectively. 3a and 53b are tape guides; 4 is a capstan; these tape guides 3a and 3b and the capstan 4 form a running path for the tape 5;
A first head group 6a and a second head group 6b are arranged along this travel path.

These head groups ι06a and 6b are respectively erase heads 7a and 7b) recording head Ba, 8b) playback head 9a,
9b. In the above tape recorder,
The tape 5 is pressed against the capstan 4 by the pinch roller 10, and the tape 5 is run at a constant speed in the direction of arrow A or in the opposite direction to the direction of arrow A depending on the rotation direction of the gear '5 pushtan 4, and this tape 5 is pushed onto the reel 2a. Or it is wound up by 2b.

When the tape 5 is running in the direction of arrow A, the first head group 6a is in operation, and when the tape 5 is running in the direction opposite to arrow A, the second head group 6b is in operation. Since a reel-to-reel type tape recorder (deck) as shown in Figure 1 is also used in combination with a tuner, preamplifier, main amplifier, cassette deck, etc.5, it is desirable to use these in a stacked manner. There is.

In this way, tape recorders with a short outer casing dimension 1 in the height direction are preferable for stacking.

In the tape recorder shown in FIG. 1, in order to shorten the dimension 1, the following steps are required: ＼The capstan 4, the tape guides 3a, 3b, etc. are arranged on a common tangent line 11 to the outer periphery of the reels 2a, 2b. It is conceivable to set up

However, in order to arrange the head groups 6a, 6b, etc. on this tangent line 11, this connection section must be made sufficiently long, and the interval between the reel stands 1a, 1b, that is, the width of the tape recorder, becomes abnormally large. This has the disadvantage that the tape is large, and furthermore, arranging the head groups 6a and 6b on a straight line such as the tangent line 11 has the disadvantage that the tape does not come into contact with the heads and is not practical. In order to achieve sufficient tape contact, it is necessary to make the tape running path arcuate, and if the tape running path is made arcuate, the above-mentioned dimension 1 increases. The tape recorder shown in FIG. 2 can be considered as a tape recorder that can eliminate the above-mentioned drawbacks, reduce the dimension 1, and have a good tape per tape recorder.

In FIG. 2, the same reference numerals as in FIG. 1 indicate the same elements. Reference numeral 3 is a tape guide consisting of a guide roller,
It is arranged between the two reel stands 1a and 1b.
4a, 4b are capstans, and the reels 2a, 2
It is disposed near a common tangent line 11 of the outer circumference of b.

The tape guide 3 and the capstans 4a, 4b form a running path for the tape 5 along the outer periphery of the reels 2a, 2b. Pinch rollers 10a and 10b press the tape 5 against the capstans 4a and 4b.

In the tape recorder shown in FIG. 2 above, the pinch roller 10a
When the tape 5 is pressed against the capstan 4a, the tape 5 is run at a constant speed in the direction of arrow A, and the pinch roller 1
When the tape 5 is pressed against the capstan 4b, the tape 5 is run at a constant speed in the direction opposite to the arrow A.

As mentioned above, in the above tape recorder, since the head groups 6a and 6b are not arranged below the tangent line 11, the height dimension 1 of the tape recorder can be shortened.
Further, since the tape running path is formed approximately along a part of the outer periphery of the reel, sufficient contact between the tape and the head can be achieved.

By the way, in the one shown in FIG. 2, the tape 5 is on the reel 2.
From a, the tape extends from between the capstan 4b and the pinch roller 10b to the head group 6b1, the tape guide 3, and the head group 6a, passes between the capstan 4a and the pinch roller 10a, and reaches the reel 2b. Therefore, when mounting the tape, the work of wrapping the tape along the tape path becomes complicated. The present invention facilitates mounting of the tape in the tape recorder as shown in FIG. The tape is mounted and then the tape guide is brought between the two reels, so that the tape comes into contact with the front magnetic head group.

An embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 13.

FIG. 3 shows a reel-to-reel tape recorder, and parts not directly related to the present invention are omitted.

Further, the front panel, substrate, sub-board, etc. of the tape recorder are shown in a transparent state and are omitted from illustration, and the stopped state is shown. In Fig. 3, reference numeral 1
a and 1b are well-known reel stands, and these reel stands 1
Reels 2a and 2b are attached to a and 1b, respectively.

3 is a tape guide (roller), which is movable as described later.

4a and 4b are well-known capstans, 5 is a tape, 6a,
6b is a magnetic head group, 7a, 7b are erase heads, 8a,
8b is a recording head, 9a and 9b are playback heads, 10a,
Reference numeral 10b designates pinch rollers, which have been described with reference to FIG. 2 above.

The above-mentioned groups 6a and 6b are attached (adjustably as is known) to the above-mentioned substrate.

12a, 12b, 13a, 13b are tape guide pins implanted in the substrate.

Tension arms 14a and 14b are rotatably attached to the substrate using 15a and 15b as fulcrums, respectively.

Further, tape guide pins 16a, 16b are implanted in these arms 14a, 14b. 17a, 17b
Arms are rotatably attached to the substrate with fulcrums 18a and 18b, respectively, and the pinch rollers 10a and 10b are rotatably attached to these arms, respectively.

Reference numeral 19 denotes a V-block which will be described later, and 20a and 20b denote guides which will be described later, which are fixed to the substrate.

Reference numeral 21 denotes a large-diameter gear, which is rotatably attached to the base plate and has a notch 22 on its circumferential surface.

Due to the rotation of the gear 21, the tape guide 3 is moved along the guides 20a and 20b from the outside of the substantially tangent line 11 (shown in FIG. 3) explained with reference to FIG. 2, as described later, and as shown in FIG. It reaches a position between the reels 2a and 2b.

As a result, the tape 5 is brought into contact with the head groups 6a and 6b. FIG. 5 shows a mechanism for moving the tape guide 3, etc., and in the state shown in FIG.
, 2b1 guide 20a, 20b1″\tudo group 6a, 6b
etc. are removed.

In FIG. 5, flywheels 23a and 23b are fixed to the capstans 4a and 4b in a well-known manner. A gear 24 is fixed to the capstan 4a, and the gear 24 meshes with the gear 21.

A small gear 25 is fixed concentrically to this gear 21, and this gear 25 meshes with a gear 26 (shown in FIG. 6), which will be described later. This gear 26 is rotatably attached to a shaft 28 fixed to a sub-board 27 fixed to the board. A plate 29 is integrally formed on the shaft 28, and a gear 30 is fixed to the plate 29. A cam 31, which will be described later, is integrally formed with the gear 26, and the arm 3
2 is fixed. Gears 35 and 36 are rotatably attached to this arm 32 using 33 and 34 as fulcrums, respectively. The gears 25 and 36 are meshed with each other, and the gears 25, 26, 30, 35, and 36 have a tooth ratio of 1:2:2:
The ratio is 1:1. That is, when the gear 25 rotates once,
The gear 26 rotates half a rotation, and the arm 32 rotates a half rotation.This causes the gear 35 to rotate one rotation with respect to the arm 32, and thereby the gear 36 also rotates one rotation. An arm 37 is fixed to the gear 36, and a pin 38 is implanted in the arm.

An arm 39 is rotatably attached to this pin 38. Pins 40 and 41 are implanted in this arm 39,
As shown in FIGS. 6 and 7, long holes 43a and 43b of a roller holder 42 are fitted into these pins 40 and 41, and the roller holder 42 is slidably attached to the arm 39. A traction spring 44 is stretched between the pin 41 and the holder 42, and a roller housing 45 is fixed to the holder 42, and a shaft to which the tape guide (roller) 3 is fixed is fixed to the holder 42. 46 is rotatably fitted, and a shutter 47, which will be described later, is fixed to this shaft 46. As shown in FIG. 8, the holder 42 is fitted into the grooves of the guides 20a, 20b, and is movable along the guides 20a, 20b.
In FIG. 6, reference numerals 48 and 49 indicate a light emitting element and a light receiving element, which are fixed to the substrate, and the light reaching the light receiving element 49 from the light emitting element 48 is intermittently blocked by the rotation of the shutter 47. The rotation speed of the tape guide 3 is detected. In FIG. 5, 50 is a sliding rod, and long holes 51a and 51b of the rod are slidably fitted into pins 52a and 52b implanted in the substrate, so that the sliding rod 50 is It is slidably attached to the board.

The rise of one end of this sliding rod 50 is caused by the cam 31
The long holes 53a, 53 of the sliding rod 50
pins 55a implanted in the arms 54a, 54b;
55b is loosely fitted, and these arms 54a, 54b are
They are rotatably attached to the substrate using fulcrums 6a and 56b, respectively. A pin 57 is implanted in these arms 54a, 54b only for the arm 54b as shown in the figure, and the pin 57 is in contact with the arms 17a, 17b. These arms 17a, 17b are connected to springs 58
a, 58b. The arm 17a,
An arm 60 is attached to the arm 17b so as to be rotatable about the fulcrum 59 as shown in the figure, and a pin 61 is implanted in the arm 60. Reference numeral 62 denotes an arm, which is rotatably attached to the substrate with 63 as a fulcrum, and the pin 61 is loosely fitted into a long hole 64 at one end.
The other end of the arm 14b is engaged with a pin 65 of the illustrated arms 14a, 14b.

As shown in FIG. 9, the arm 60 has a raised portion 6.
6. A hole is bored in the vertical portion 67, and a sliding piece 68 is slidably fitted into the hole. This sliding piece 68 has a pin 6
9 is implanted, and a traction spring 70 is stretched between the pin and the arm 60. An arm 71 is rotatably attached to the board using 72 as a fulcrum, one end of which is rotatably attached to the sliding piece 68 about the pin 69, and the other end is attached to a link 74 with 73 as a fulcrum. The actuating rod 76 of the electromagnetic plunger 75 is connected to the actuating rod 76 of the electromagnetic plunger 75 via the actuating rod 76 of the electromagnetic plunger 75.

Elements equivalent to the electromagnetic plunger 75, arms 71, 62, 60, sliding piece 68, etc. are also provided on the arms 17a, 14a.

Reference numeral 77 denotes a motor, and by means of a belt 78 that is wound around the flywheels 23a and 23b from the motor, these flywheels are rotated in opposite directions, that is, 23a is rotated clockwise and 23b is rotated counterclockwise. .

FIG. 10 shows a mechanism for starting the gear 21, and this mechanism is omitted in FIG. 5 to avoid complication of the drawing.

In FIG. 10, 79 is an arm, which is rotatably attached to the gear 21 with 80 as a fulcrum. This arm 79 is biased clockwise with respect to the gear 21 by a traction spring 81, one end is engaged with a pin 82 which will be described later, and the other end is provided with claws 83a, 83 protruding from the gear 24.
You can face the passage of b. An arm 84 is rotatably attached to the gear 21 about a fulcrum 85, and is biased counterclockwise with respect to the gear 21 by a traction spring 86.

The pin 82 is implanted at one end of the arm 84, and the pin 82 is pressed against the arm 79 by the spring 86. Reference numeral 87 denotes an arm, which is rotatably attached to the gear 21 about the fulcrum 85, and its vertical portion 88 is attached to the arm 84 by a spring 89 which biases the arms 84 and 87 so as to pull them together. It is pressed.

Reference numeral 90 denotes an arm, which is rotatably attached to the substrate using 91 as a fulcrum, with a pin 92 directly connected to one end thereof, and the other end connected to an operating rod 94 of an electromagnetic plunger 93.

This arm 90 is biased clockwise by a traction spring 95 and is pressed against a stopper 96 implanted in the base plate. Reference numeral 97 denotes an arm, which is rotatably attached to the substrate with 98 as a fulcrum, and is biased counterclockwise by a traction spring 99.

A pin 100 is implanted at one end of the arm 97, and the pin 100 is pressed against a cam surface 101 integrally formed with the gear 21 by the spring 99. In the tape recorder described above, the reel stand 1 is
The reels 2a and 2b are attached to the capstans 4a and 1b in a well-known manner, and the tape 5 is attached to the capstans 4a and 4b and the pinch rollers 10a and 1b.
10b, along the substantially tangent line 11 mentioned above.

In this state, as shown in FIG. 11, the arm 17b of the pinch roller 10b is biased clockwise by the spring 10b, and this bias presses the pin 57, and the arm 54b is biased counterclockwise. As a result, the sliding rod 50
is pressed against the cam 31, and the sliding rod 50 is pressed against the cam 31.
1, the sliding rod 50 comes closest to the center of the gear 30, and therefore the arm 17b is rotated so that the pinch roller 10b is sufficiently far away from the capstan 4b. ing. Also, this arm 17b
As a result of the rotation, the arm 62 via the arm 60 is rotated clockwise, which presses the pin 65, and the tension arm 14b is rotated counterclockwise against a well-known tension spring (not shown). It is being rotated. Although the above explanation relates to the pinch roller 10b and the tension arm 14b, the tape 5 shown in FIG. It has been moved to a more convenient location. With the tape 5 mounted as shown in FIG. 3, the electromagnetic plunger 93 shown in FIG. 10 is momentarily excited.

Due to the excitation of the plunger 93, the arm 90 is activated by the spring 9.
5 and rotated counterclockwise. This rotation causes
The arm 87 is pressed by the pin 92 of the arm 90, and due to the pressing, the vertical portion 88 presses the arm 84,
This pressing causes the arm 84 to rotate clockwise against the spring 86, and this rotation causes the pin 82 to separate from the arm 79, causing the arm 79 to rotate clockwise due to the spring 81. Due to this rotation, the arm 79 comes into contact with the pin 102 implanted in the substrate as shown by the chain line 79, and the arm 79
The end of the claw 8 reaches within the path of the claws 83a and 83b, and the end of the claw 8
The arm 79 is pressed by 3a and 83b. Due to this pressure, the gear 21 is rotated in the direction of the arrow B, and due to this rotation, the gear 21 is meshed with the gear 24, and the gear 21 is rotated in the direction of the arrow B.
rotated in the direction When the end side edge of the arm 79 reaches the position of the pin 102 due to the rotation of the gear 21, the arm 79 returns to the position shown by the solid line, and since the plunger 93 is not excited at this time, the pin 82 is The arm 79 returns to the position shown by the solid line in FIG. 10 and is in a locked state. Therefore, when the gear 21 rotates once and the notch 22 of the gear 21 comes to the position of the gear 24 again, the rotation of the gear 21 stops. When the gear 21 rotates once, the gear 25 integrally formed with the gear 21 also rotates once.

One rotation of the gear 25 causes a gear 26 that is meshed with the gear 25 and has twice the number of teeth of the gear 25 to rotate half a rotation. This half rotation of the gear 26 also causes the arm 32 fixed to the gear 26 to rotate half a rotation. By this half rotation of the arm 32, the gear 35 which is engaged with the gear 30 and has half the number of teeth of the gear 30 is rotated once with respect to the arm 32, and is engaged with the gear 35 and has the same number of teeth as the gear 35. Gear 36 is also rotated once. Therefore, the dead arm 37 fixed to this gear 36 also rotates once. When the gear 21 is started when the tape guide 3 is in the state shown in FIG.
In the state shown in Fig. 2, when the gear 21 rotates about 3/4 in the direction of arrow B, the arm 32 rotates about 75 degrees as shown in Fig. 13, and the arm 37 rotates about 75 degrees with respect to this arm 32. . As described above, the rotation angle of the arm 32 and the rotation angle of the arm 37 with respect to this arm 32 are equal, and the distance between the rotation fulcrum of the arm 32 and the rotation fulcrum of the arm 37 and the rotation fulcrum of the arm 37 are equal. Since the distance between the center of the pin 38 and the center of the pin 38 is equal, the pin 38 moves on a straight line due to the above-described rotation of the arms 32 and 37. By the linear movement of the pin 38, the roller holder 42 is moved along the guides 20a, 20b, and the housing 45 is brought into contact with the block 19.

In this contact state, the pin 38 is further moved,
This stretches the spring 44 and presses the housing 45 against the block 19. In this pressed state, as shown in FIG. 4, FIG. 5, or FIG. There is. Further, in this state, the arms 32 and 37 are not yet in a straight line, and the pin 100 of the arm 97 is in contact with the stepped portion of the cam surface 101. Therefore, when the pin 100 hits the stepped portion, the rotation of the hook 21 in the direction opposite to the arrow B is prevented, and therefore the rotation of the arm 32 in the clockwise direction and the rotation of the arm 37 in the counterclockwise direction are prevented. Pin 3 is prevented from rotating to
8 is never moved in the opposite direction to its previous movement direction. In this way, when the tape guide 3 is in the position shown in FIG. 4, the pin 38 is prevented from moving in the opposite direction, so even if the tape tension is large, the spring 44 is sufficiently strong. , the tape guide 3 is never moved away from the block 19.

Next, when the plunger 93 is momentarily energized again,
The gear 21 makes one rotation, but this one rotation causes the gear 26
Then, the arms 32, 37, etc. are rotated in the same direction as in the previous case, and the tape guide 3 returns from the position shown in FIG. 4 to the position shown in FIG. 3.

As the tape guide 3 moves from the position shown in FIG. 3 to the position shown in FIG. 4, the cam 31 fixed to the gear 26
is in the state shown in FIG. 5 due to the state shown in FIG. 11, the pinch rollers 10a and 10b approach the capstans 4a and 4b, and the tension arms 14a and 14b apply tension to the tape 5 by their springs as shown in FIG. It will be in a state where it will be granted.

In the state shown in FIG. 4, when the plunger 75 is excited, the arm 17b is pulled via the link 74, arm 71, spring 70 and arm 60, the pinch roller 10b presses the tape 5 against the capstan 4b, and the tape 5 is run at a constant speed in the direction of arrow C in FIG. 4, and the tape 5 is wound onto a reel 2a as is well known.

At this time, the head group 6b is in operation, and recording onto the tape 5 or reproduction from the tape 5 is performed in a well-known manner. The above pinch roller 10a1 tension arm 1
4a as well, the tape 5 is moved by the pinch roller 10 by excitation of the other plunger similar to the plunger 75.
The tape 5 is pressed against the capstan 4a by the tape 5a, and the tape 5 is run in the direction opposite to the arrow C and wound onto the reel 2b as is well known. At this time, the magnetic head group 6a is in operation. In the above embodiment, the tape 5 is attached to the pinch rollers 10a, 10a and 10b on the capstans 4a and 4b having different rotational directions.
The present invention has been applied to a tape recorder in which the tape is selectively pressed against two capstans rotating in the same direction using a pinch roller.
The present invention can also be applied to a so-called double capstan closed loop tape recorder.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional example, Fig. 2 is a block diagram used to explain the present invention, Figs. 3 to 13 show an embodiment of the present invention, and Figs. 5 is a plan view showing the inside, FIG. 6 is a side view of the main part, FIG. 7 is a plan view of the main part, FIG. 8 is a front view of the main part, 9 is a partial side view, FIGS. 10 and 11 are plan views showing the interior, and FIGS. 12 and 13 are plan views showing the main parts in different operating states.

Claims (1)

[Claims] 1. Separate reel stands 4 to which two reels can be attached, tape guides forming a running path for the tape to move from one reel to the other of the two reels attached to these reel stands. and a magnetic head group and a capstan arranged along the running path of the tape, wherein the tape guide is mounted between the two reel stands and the tape guide is attached to the two reel stands. Two capstans are arranged near a common tangent line to the outer periphery of each reel, and the outer periphery of each separate reel is attached to the two reel stands by these two capstans and the tape guide. A tape running path is formed along the tape running path, a magnetic head group is disposed between the tape guide and the two capstans in the tape running path, and a magnetic head group is provided between the two reel stands. The installed tape guide is movable, and when the tape is loaded, the tape guide is located outside the tangent line, and after the tape is loaded, the tape guide is moved between the two reel stands as described above. A tape recorder characterized in that the tape is brought into pressure contact with the magnetic head group by reaching the above steps.