JPS6035740B2 - Reversible magnetic recording and reproducing device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reversible magnetic recording/reproducing device.

Conventional reversible magnetic recording and reproducing devices have three modes for reproducing travel: ■ Stopping the vehicle when traveling in three directions, ■ Stopping the vehicle after completing one round trip, and ■ Repeating back and forth travel. , the number of component parts such as switches, wires, switching sections, etc. increases, resulting in a relatively expensive product.

Furthermore, since there were a large number of parts, workability was poor and there were many causes of defects. The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology without impairing the original functions of a reversing magnetic recording/reproducing device, by converting the 3-mode function into a 2-mode function, reducing the number of parts at a relatively low cost, and improving workability. It is an object of the present invention to provide a reversal type magnetic recording/reproducing device that takes into account improvements in performance.

In the conventional reversing type magnetic recording/reproducing device, the number of component parts was increased due to the 3-mode function, but in the present invention, consideration was given so as not to impair the original function of the reversing type magnetic recording/reproducing device. Of the three functions mentioned above, the function of "stopping actual operation after completing one reciprocating run" is removed, and the number of components is drastically reduced without impairing the original function, thereby solving the drawbacks of the prior art.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

FIG. 1 shows a plan view of a tape recorder, in which a pair of reel stands 2 and 3 are arranged on the left and right on a board 1, and a pair of left and right capstan shafts 4 and 5 are arranged in front of them. ing.

The capstan shafts 4, 5 are supported by a pair of left and right bearing members 6, 7, and as shown in FIG. It is fixed. In addition, the capstan shaft 4
, 5, a pair of pinch rollers 10 and 11 are disposed opposite to the rollers 10 and 5. The pinch rollers 10 and 11 are rotatably supported by parts of arms 14 and 15 which are rotatably mounted on shafts 12 and 13 that stand on the substrate 1. Parts 14a and 15a of the arms 14 and 15, and a part 1 of the play plate 17 that slides behind the board 1 in conjunction with the play slider 16 shown in FIG. 3 during tape recorder playback.
7a, 17b, tension springs 18, 19 are tensioned, and the compression force of the tension springs 18, 19 increases the pressing force of the pinch rollers 10, 11 against the capstan shafts 4, 5. By obtaining the tape (
(not shown) constant speed running can be obtained. At the rear of the board 1, a cassette holding arm 20 is arranged, which is held between parts la and lb of the board 1. The cassette holding arm 2 is rotatably mounted on a shaft 21 supported by parts la and lb of the board 1, and the cassette holding arm 20 is attached to the part la and lb of the board 1. A portion 20a of the cassette holding arm 20 is rotated by the elastic force of a threaded spring 22 which is supported by the shaft 21 and is iron-loaded to the shaft 21. The cassette is pushed forward by contacting the rear end of the cassette. In addition, a shaft 23 (upper left in FIG. 4) is mounted on the base plate 1, and a member 24 for preventing unauthorized recording of a cassette is attached to a portion of the shaft 23 so as to be rotatable. It has a detection part 24a for detecting the presence or absence, another part has an arm part 24b, and another part 24c is formed so as to penetrate through the back side of the substrate 1. The arm portion 24b comes into contact with the cut-up capital lc of the board 1 and is elastically deformed, and as a reaction, the accidental recording prevention member detection portion 24a is rotated clockwise around the shaft 23, and the cassette is unintentionally moved. The presence or absence of a recording prevention piece can be detected. Here, if there is no cassette recording prevention piece, the third
In conjunction with a portion 60a of the recording slider 60 shown in the figure, the recording slider 60 can be prevented from sliding, and recording is disabled. In addition, if the cassette has a piece to prevent mistaken recording,
By rotating the erroneous recording prevention member 24 counterclockwise about the shaft 23 when the cassette is inserted, the interference between the part 24c of the erroneous recording prevention member and the part 60a of the recording slider is avoided, and the recording state is established. You can bring it to fruition. Board 1
The play plate 17 is located near the central reel stands 2 and 3.
A brake plate 27 is also provided which slides in conjunction with the fast forward switch 25 and the rewind slider 26 shown in FIG. Brake rubbers 28 and 29 are interposed at the contact portions of the brake plate 27 with the reel stands 2 and 3, and their relatively large frictional force and the forward biasing force of the torsion spring 30 cause the reel to move. Apply braking to platforms 2 and 3. A head plate 33 on which a head stand 31 and an erasing head 32 are mounted is disposed in the front part of the substrate 1. The head plate 33
is rotatably fixed to a shaft 34 that stands on the base plate 1, but a tension spring 35 is stretched between the part 17c of the play plate 17 and the head plate 33, and when playing When the play plate 17 is displaced rearward, the tension force of the tension spring 35 causes the head plate 33 to move its part 3.
The rotational displacement is performed until 3a abuts the end 36a of the pin 36 established in the substrate. This is the playback state position. Further, in order to regulate the position of the head plate 33 in the vertical direction, it is pressed downward by a plate spring 37. Furthermore, the head plate 3
The head stand 31 sent in No. 3 is held between a head arm 39 to which a green head 38 is fixed, and a shaft 41 that pivots a torsion spring 40 to the head stand 31. The head arm 39 rotates about a shaft 41, but is elastically biased in one direction by the force of the torsion spring 40. A slider 42 that can slide left and right is arranged near the center of the board 1, and a part of the slider 42 is equipped with relief balls 43.
It is engaged with the plate spring 44 via.

The plate spring 44 has two circular notches 44a, 44b and 1.
When the ball 43 is inserted into either one of the circular notches 44a and 44b, the downward elastic pressing force of the plate spring 44 causes the slider 4 to
2 is held and fixed. The circular notches 44a and 44b are smaller than the outer diameter of the ball 43, and the outer diameter of the circular notch 44a near the fixed part 118 of the spring 44 is smaller than the outer diameter of the fixed part 1.
The outer diameter of the circular notch 44b that is far from the fixing part 118 is made smaller than that of the circular notch 44b to prevent the locking force from changing due to changes in the elastic force of the leaf spring 44 depending on the distance from the fixing part 118. Also, a part of the slider 42 is engaged with a switching arm 47 that is engaged with a switching cam 46 that converts the linear motion of a solenoid 45 (upper part of FIG. 1) into rotational motion, and the operation of the solenoid 45 causes the slider 42 to Perform left and right sliding motion. Note that the solenoid 4 is fixed to the substrate 1 via a holder 48.
5, a bar 50 is cut into the iron core part 49 and attached to the shaft 5.
1, a shaft 52 stands on a part of the switching lever 50, and a tension spring 53 is stretched between the shaft 52 and the holder 48, A biasing force is applied in a direction opposite to the suction direction of the iron core 49 when the solenoid 45 operates (at the time of suction). Therefore, when the solenoid 45 is opened, the switching lever 50 is moved to the iron core 4 by the tightening force of the tension spring 53.
It is possible to return and stop at a position parallel to the moving direction of 9. A shaft 54 is mounted on the holder 48, and the switching cam 46 is fitted with iron so that it can rotate around the shaft 54. A shaft 5 is attached to a part of the switching cam 46.
5 is integrally molded, and a part 47a of the sliding door arm 47
is engaged with. The switching arm 47 is rotatably fixed to a shaft 56 that stands on the substrate 1, and a portion of the switching arm 47 engages with a portion of the slider 42 via a shaft 57 that is mounted on the slider 42. FIG. 3 shows a back view of the tape recorder, in which a pause slider 58, a stop slider 59, a fast-forward slider 25, a place slider 16, a rewind slider 26, and a recording slider 60 are arranged on the board 1 so as to be slidable in the front and rear directions. The slider has operating nails 119, 120, 121, 122, 1, respectively.
23 and 124 are engaged.

Further, a lock plate 61, a select plate 62, and a plate 63 are arranged to be slidable in the left and right direction, and are held and fixed by a slider cover 64. the slider;
Tension springs 65, 66, 6 are attached to the plates, respectively.
7, 68, 69, 70, 71, 72, and 73 are stretched so that they can be elastically tilted in one direction. When each slider 25, 16, 26, 60 except the stop slider 59 and pause slider 58 is operated, the fourth
Parts 25a, 16a, 26 as shown in FIG.
a, 60a engage with a lock plate 61 having cam portions 61a, 61b, 61c, 61d, so that each slider is engaged and held. A pin 74 stands on a part of the pose slider 58, and the pin 74 slides against the cam groove 75a of the pose lock arm 75 to displace it.

The pose lock arm 75 is rotatably mounted on a shaft 76 that stands on the board 1, and the screw spring 7
7, it is elastically biased counterclockwise around the shaft 76. Therefore, when the pose slider 58 is operated, the pin 74 is locked and held at the position of the cam groove 75b, resulting in a pose state. Next, when the pose slider 58 is slid backward to release the pose,
The pose slider 58 is moved from the cam groove 75b of the pose lock arm 75, which receives a counterclockwise biasing force of rotation about the shaft 76 by the torsion spring 77.
The shield pin 74 is disengaged from the cam groove end 75.
c by the tightening force of the tension spring 65, and engages with the cam groove 75a again. Also pose slider 58
A portion 78 (FIG. 1) of the pose arm 80 engages with the pose plate 79 and the first pose arm 80 during a pose operation, and a portion 80a of the pose arm 80 engages a portion 81a of the second pose arm 81. match. The pause plate 79 is fixed to the slider 42 by a plurality of shafts 82 and 83 so as to be slidable in the left-right direction. Further, the pause plate 79 is partially provided with a protrusion 84, and a pair of protrusions 85, . Two tension springs 87 and 88 are stretched between the pause plate 79 and the tension springs 86, and the pause plate 79 attempts to be in a position where the tension forces of the tension springs 87 and 88 are balanced. A portion 78 of the pose slider and one end cam portion 79a of the pose plate 79, 7
When the pause plate 79 is slid to the left (or right) due to the contact between the pause plates 9b and 9b, the take-up mechanism (not shown) that is engaged with a portion 89 of the pause plate 79 is released, and the pause plate 79 is released. State and make. In addition, the first pose arm 8 is rotatably fitted with iron to a shaft 13 installed on the substrate 1, and when a part 80b of the first pose arm 8 is connected to a part 78 of the pose slider, the pose arm 80 is connected to the shaft 13. Rotate counterclockwise around 13. Further, a part of the pose arm 80 is provided with a bending part 80c, and as the pose arm 80 rotates counterclockwise around the shaft 13, a part of the arm 15 that pivotally supports the pinch loaf 11 is bent. 15b, and by rotating the arm 15 counterclockwise about the shaft 13, the pinch roller 11 and the capstan shaft 5 are separated from each other, thereby creating a pause state in which tape running is temporarily stopped. Further, the second pose arm 81
A shaft 9 is mounted so as to be rotatable, and a portion 81a of the shaft 9 is engaged with a portion 80a of the first pose arm 80. By rotating counterclockwise about shaft 13, second pose arm 81 also rotates counterclockwise about shaft 90. Furthermore, a part of the pose arm 81 is provided with a cut-and-raised part 81b.
By rotating counterclockwise around the shaft 90 of No. 1, the cut-and-raised portion 81b comes into contact with a part 14b of the arm 14 that pivotally supports the pinch roller 10, and the arm 14 is rotated clockwise around the shaft 12. By rotating the pinch roller 0 and the capstan shaft 4 in this direction, the pinch roller 0 and the capstan shaft 4 are separated from each other and a pose state is created. When the pose slider 58 is operated, the above-mentioned release of the connection of the winding mechanism and rotation of the two arms 14, 14 are made to operate almost simultaneously. A motor 92 is fixed to the substrate 1 via a holder 91, as shown in FIG.

A motor pulley 93 is fixed to the motor 92 and is rotationally connected to the flywheels 8 and 9 via an inorganic belt 94. When the endless belt 94 is mounted as shown here, the flywheels 8 and 9 rotate at the same speed in opposite directions, so that the capstan shafts 5 and 9 fixed to the respective flywheels 8 and 9 4 also rotate at the same speed in opposite directions. Further, the flywheel 8, the winding drive pulley 95, and the table feeding/rewinding drive pulley 96 are rotationally connected via an endless belt 97. The plate 63 has a bent portion 63a which is inserted into a hole 98a of an eject lever 98. During ejection, a portion 59a of the stop slider 59 comes into contact with a portion 98b of the eject lever 98, and as the stop slider 59 is displaced, the eject lever 98 moves into the hole 98a.
The eject arm 99 is rotated clockwise around
The eject arm 99 is brought into contact with a portion 99a of the eject arm 99, and the eject arm 99 is rotated. Figures 4 to 7 show the operational relationship of the main kirishi saga structure of a tape recorder expanded from the cassette side. Figure 4 shows the stopped state in reverse mode,
The figure is a diagram related to the operation of only mode switching in Figure 4, Figure 6 is a diagram related to the operation of the stop mode, and Figure 7 is a diagram related to the operation of the rewind slider 2.
6 and 8 and 9 respectively show perspective views of the mode cut-off mechanism.

Here, the reverse mode refers to a repeating function in which when the tape recorder is in a one-way playback state and the tape reaches the end of the tape, the tape running direction is reversed and the playback state is resumed. Further, the stop mode refers to a function in which when the tape recorder is in a playback state and reaches the end of the tape at the end of tape running in one direction, the playback state is canceled and the tape recorder automatically returns to a stop state. From now on, the related operations of the main switching sections in the two modes will be mainly explained. The stop renovation 100 and the select lever 101 are rotatably fixed to a shaft lo2 standing on a select plate 62.

A tension spring 103 is stretched between the select lever 101 and the eject lever 98, and the tension spring 103 allows the eject lever 98 to return to its normal position even after rotating about the shaft 102. Board 1
In order to fix and hold the select lever 101, which is rotatable around a shaft 104 that stands above the stereotaxic calendar, a portion 105a abuts and engages with the end portion 101a of the select lever.
As shown in FIG. 2, a part 105b of the switching plate 105 is equipped with the aforementioned spherical ball. It engages with a leaf spring 107 via a ball 106. The leaf spring 107 also has two circular notches 107a, 107b and a groove-like notch 170c as described above, and the ball 106 is provided with the circular notches 107a, 107b.
When either one of them is filled with iron, the switching plate 105 is held and fixed by the downward elastic pressing force of the leaf spring 107. The switching plate 105 is provided with a bent portion 105c, and a tension spring 109 is stretched between the bending portion 105c and a portion 108 of the substrate 1, and the tension spring 109 causes the circular notches 107a, 1
At positions other than 07b, the switching plate 105 is always fixedly held at one of the circular notches 107a and 107b without being folded. Here, the switching plate 105
is a sliding member having a mode selection function of slidingly displacing two positions in order to select one of two modes. A slider 110 is disposed on the side surface of the substrate 1 so as to be slidable in the front and rear directions.

A part 110a of the slider 110 is a lever 112 rotatably fixed to a shaft 111 mounted on the holder 48.
It is arranged so that a part 112a and this wisteria can be connected. Also slider 1
A tension spring 113 is stretched between the stop lever 100 and the stop lever 100, and applies an elastic biasing force to the slider 11. When the switching plate 105 is set to the reverse mode position, Figs. 4, 5, 8, and 9
As shown in the figure, when the solenoid 45 operates and the iron core 49 is attracted by the solenoid 45, the shaft 51 that stands on the iron core 49 is also attracted, and the lever 112 is brought into contact with the part 112b of the lever 112. It is rotated counterclockwise around the shaft 111. At the same time, part 1 of Shi-
12a comes into contact with a portion 110a of the slider 110, and the slider 110 slides rearward against the tension of the tension spring 113. Furthermore, the cut bar 501 and the pin 5
2 is slidably displaced along the cam portion 46a of the switching cam 46, reaches the cam end portion 46b, and further, due to the displacement of the pin 52, the switching cam 46 is rotated around the shaft 54, and at the same time, a part of the switching cam Switching arm 4 engaged with 46c
7, the slider 42 can be switched to the left (or right). At this time, part 11 of the slider 110
It is clear that by entering the recess 100c of the stop lever 100, the operation of the stop lever 0c is not inhibited in any way. When the switching plate 105 is set to stop mode,
As shown in FIG. 6, when the solenoid 45 is activated and the iron core 49 is attracted by the solenoid 45, the shaft 51 that stands on the iron core 49 is also attracted by the part 11 of the lever 112.
2b, the lever 112 is rotated counterclockwise around the shaft 111, and at the same time, a portion 112a of the lever comes into contact with a portion 110a of the slider, resisting the tension of the tension spring 113 and moving the slider 10. slides backwards.

As the slider 110 is displaced, a portion 110c of the slider
is a part 100a of the stop lever 100 having an inclined part.
At the same time, the stop lever 100 is in contact with the shaft 10.
The part 100b of the stop lever contacts the cut and raised portion 61a of the lock plate 61, and the lock plate 61 is moved by the spring 71.
The locking of each slider is released by sliding displacement against the tension of the slider. Immediately after release, the select plate 62 moves to the right due to the tightening force of the tension spring 72 and tries to release the engagement between the slider 10 and the stop lever 100, but while the solenoid 45 is operating, that is, while the iron core 49 is being attracted, the select plate 62 does not stop. Since the part 100a of the lever has an inclined part, the part 110c of the slider and the stop lever 100 are prevented from sliding to the right when the stop lever 100 is hit, and the selection plate 62 is moved to the right by the tightening force of the tension spring 72. It is possible to prevent the danger of the stop state which is the objective of this mode and the switching of the above mode due to malfunction occurring at the same time. Further, when the slider 10 is slid, the part 100c of the stop lever 100 is supported by the part 117 of the base plate 1 just before the pin 52 standing on the switching lever 50' reaches the cam terminal end 46b of the switching cam 46. Displacement of the slider 110 is prevented.

FIG. 7 shows, as an example, the locked state of the rewind slider 26 in the reverse mode, and the locked state of the recording slider 60 and the fast forward slider 25 by the slider engaging force parts 114, 115, 116 of the select plate 62. It can be seen that the position of the select plate 62 is the same in both cases.

That is, during recording, fast forwarding, and rewinding, the locks are released when the tape finishes running, so that the tape has the same function as the stop mode during playback, regardless of the mode. As described above, according to the present invention, forward/reverse switching occurs by the operation of a single solenoid 45, and at the same time, a small number of switching members (here, the select plate 62, select lever 101, stop lever 100), etc. By providing this, it is also possible to obtain an automatic stop mechanism at the end of the tape.

Therefore, in a tape recorder equipped with a reverse mechanism,
A mechanism that does not impair its basic performance in any way, is relatively inexpensive, has a small number of component parts, and is easy to assemble. The reversing type magnetic recording/reproducing device of the present invention requires only one electromagnetic solenoid instead of the conventional multiple electromagnetic solenoids, thereby reducing the number of electrical components and mechanical components. This can be expected to improve work efficiency, reduce costs, and reduce the number of defective factors.

[Brief explanation of the drawing]

The drawings all relate to an embodiment of the reversible magnetic recording/reproducing device according to the present invention, and FIG. 1 is a plan view thereof, FIG. 2 is a side view of the same, FIG. 3 is a back view thereof, and FIG. A plan view of the stopped state in reverse mode, FIG. 5 is a plan view of the mode switching section of FIG. 4, FIG. 6 is a plan view of the stop mode, and FIG. 7 is a plan view of the rewind slider in the locked state. , 8 and 9 are perspective views of the mode switching section. 45: solenoid, 46: switching cam, 47: switching arm, 50: switching lever, 61:. back plate, 62: select plate, 63: plate, 101: select lever, 102: select plate, 105 switching plate, 1 10: slider, 11
2: Lever. Hair' Figure 2 Figure 3 Figure Figure 4 Kaya 5 Figure Figure 6 Figure 7 Akira Figure 8 Tsutomu? figure

Claims (1)

[Claims] 1. In a reversible magnetic recording/reproducing device in which the tape running system is reversed by the operation of a reversing member by energization of a solenoid, there is a first position where the tape runs in a repeating reciprocating mode and a second position where it automatically stops at the end of one-way running. 2, a switching means that responds to the selection means and each operating member for recording/fast forwarding/rewinding, and a holding member that holds each operating member such as a playback operating member; Recording and fast forwarding regardless of the position of the means in the first position or the position of the selection means. One of the operating members for rewinding is held by the holding means, and at the end of the tape, the switching means moves the plunger through the first sliding range to release the holding state of the holding means and bring each operating member to a stopped state. Also, when the selection means is in the second position and at the end of the tape in the playback mode, the plunger moves through a wider second sliding range that includes the first sliding range, drives the reversing member, and changes the tape running direction. 1. A reversible magnetic recording/reproducing device, wherein the switching means causes the holding means to be inoperative even when the switching means is switched.