JPS606027B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device, and particularly to a magnetic recording/reproducing device configured to maintain a tape running state by actuation of an electromagnetic drive means such as a plunger, as seen in tape decks for vehicle battles. The purpose of the recording and reproducing apparatus is to maintain the state of tape running while consuming less power.

Conventionally, some tape decks for car battles have been designed to maintain the running state of the tape by the suction force of a plunger, but with this type of device, the car key is turned off and the power supply to the deck is turned off. Since the device automatically returns to the stopped state when the tape is cut off, the device is not left in a state where the pinch roller is in contact with the capstan and can run the tape for a long time, and the pinch roller wears out. This is convenient because it can prevent deterioration in the performance of the device.

However, in order to maintain the running state of the tape, this type of bag book is equipped with a large-capacity plunger dedicated to holding the tape, and this must be kept in operation while the tape is running. A large amount of power is consumed in areas that are not directly related to this, shortening the life of the battery.

SUMMARY OF THE INVENTION The present invention aims to overcome these conventional drawbacks and to maintain the tape running state with less power consumption.

More specifically, in order to maintain the true tape running state, a first electromagnetic drive means for switching the constant speed tape running direction is used;
In the initial operation process that requires a large driving force to bring the device to a position where it can hold the tape running state, this is achieved by activating the first electromagnetic driving means with a large capacity,
The subsequent holding operation is performed by a separately provided second electromagnetic drive means with a small capacity to reduce power consumption.In addition, when the first electromagnetic drive means is operated to maintain the tape running state, the tape is This is intended to prevent any inconvenience from occurring by not switching the constant speed running direction.

Embodiments of the present invention will be described below with reference to the drawings.

First of all, FIG. 1 shows the state of the operating rod mechanism and the locking mechanism of the rod in the stopped state of the magnetic recording/reproducing apparatus of this embodiment. is a stop and cassette eject rod (hereinafter referred to as stop rod). Protrusions la to 4a are provided on the side edges of these rods 1 to 4 to protrude upward. 5 is above.

This is a switch operation plate that is moved by operating the rods 1 to 3 related to tape running in the direction of arrow A to turn on the power switch 6 among the rods 1 to 4. . This switch operation board 5
is provided so as to be slidable in the left and right direction (in the direction of arrows B-C) by guide pins 8 and 9 that stand up on the mechanism board 7, and can be moved in the direction of arrow 8 by the protruding force of the operator 6a of the power switch 6. This is a locking plate that locks the tape running operation rods 1 to 3 in the operating position, and can be slid horizontally by the guide pins 8 and 9. The plate 101 has brocade parts 11 to 3 for locking the protrusions a to 3a of the rod turtles to 3 and locks each rod in the operating position, and is suspended between the plate and the base plate. Arrow B by tension spring turtle 4
biased in the direction. On the other hand, 15 is a rotating arm that is rotatably provided with the wisteria i6, 17 is a connecting arm that is connected to this arim vine 61 and is rotatable to the shaft member 8, and -19 is connected at one end to this connecting arm 17. This is the operating rod.
A pin 20 is mounted on one end of the operating rod 9, and the pin 20 is inserted into a deformation guide hole 21 provided in the mechanism board 7. Furthermore, the above operation occurs. The rod 19 is biased in the direction of arrow D by a tension spring 22 suspended between the other end and the substrate 7, and this biasing force presses the pin 20 against one end of the deformation guide hole 21, so that the actuating rod 19 In addition, the arms 15 and 17 are held in the positions shown in FIG. Since the protrusion 15a provided at one end of the wrap arm 15 is engaged with the notch 23 of the lock plate 10, in the state shown in FIG. The hooks 11 to 13 of the lock plate 10 bring the protrusions la to 3a of the operating rods 1 to 3 to a position where they cannot be locked. has been completed.

Next, 24 moves the operating rod turtle 9 in the direction opposite to the arrow ○ (in the direction of arrow A) against the force of the tension spring 22.
It is a plunger that releases the lock plate turtle 0 from being held in position by the rotating arm 15, and is fixed on the base plate 7.

This plunger 24 is used to switch the tape running direction at a constant speed, and this will be explained later.In order to drive the operating rod 19, a rotary arm is connected to the movable iron core 24a of the plunger 24 via a pin 25. 26 is connected to the rotary arm 26, and the operating rod 1 is connected to the rotary arm 26.
A protrusion 26a that can be engaged with the protrusion piece iga of No. 9 is provided. When the plunger 24 performs a suction operation and the movable core 24a is pulled, the arm 25 is rotated in all directions around the shaft 27 via the pin 25, and the projection 26a moves the operating rod 19 upward in the figure. It is starting to be moved to Next, reference numeral 28 denotes an electromagnet which serves as a driving source for locking the operating rod 19 in its moved position, that is, the operating position, and this electromagnet 2M is associated with a locking mechanism for the operating rod 19.

This locking mechanism consists of a pin 20 provided at one end of the operating rod 19 and a roller 2 rotatably provided on this pin 20.
9, the above-described deformable guide hole 21 for moving the pin 20 in an oblique direction, and a lock arm 30 that is held by the roller 29 and locks the pin 20 to the oblique side of the guide hole 21. The lock arm 3Q' is rotatably provided on the shaft 311 of the base plate 7, and one end of the lock arm 3Q' is in contact with the attracting rotary piece 32 of the crab magnet 28. When the plunger 24 is actuated, the actuating rod 19 is moved to the operating position, and when the rotary piece 32 is rotated by the attraction action of the electromagnet 28, the lock arm 30 is moved to the shaft 31.
However, the roller 29 is rotated counterclockwise, and the roller 29 is held in position by the arcuate piece 30a at the other end. The head 19 is held in the operating position. Note that the plunger 24 and electromagnet 28 are connected to the power switch 6.
When plunger 2 is turned on, both are activated at the same time, but plunger 2
The electromagnet 4 is operated for a short time by an electric circuit (not shown) and returns to its original state, and the electromagnet remains in its operating state until the power is cut off. By the way, as mentioned above, the plunger 24 functions as a switching drive source for switching the tape constant speed running direction.

To explain this using FIG. 3, the plunger 24
A drive arm 33 has one end pivotably attached to the end of the rotating arm 26 connected to the movable iron core 24a. A tension spring 34 is suspended between the drive arm 33 and the base plate 7 to hold the arm 33 in the position shown in the figure. A drive pin 35 protruding downward is provided on the idler of the drive arm 33, and this drive pin 35
A vertically cut fusuma slope 36 is arranged opposite to. This forward/reverse switching plate 36 has two recesses 37a and 37b in which the pin 35 can selectively engage, and is rotatable about a shaft 38. Further, this forward/reverse switching plate 36 is rotatably connected to a normal/reverse switching control plate 40 by a pin 39. This control plate 40 is slidable in the direction of arrows A-D by a guide (not shown), and is used to switch the electric circuit, the pinch roller, and the reel stand between the normal and reverse directions. In other words, the control element 41a of the electric circuit switch 41 for changing the connection of the magnetic head is engaged with the recess 42 of the control board 40, and is turned off as the control board 40 moves in the directions of arrows A and D. The fusuma movement is being carried out. Also, a pair of pinch rollers 43
, 44 are supported by pins 47 and 48, and the pins corresponding to the pinch rollers, which are not related to tape running, are locked with either of the cam parts 49a and 49b of the control plate 40 to perform the pinch operation. The rollers 43 and 44 are selectively spaced apart from the capstans 50 and 51.
Further, a force driver 54 that applies a winding force to either one of the reel stands 52, 53 is connected to a shaft 55 on the base plate 7 via a rotatable bar 56 and a relay lever 58 to control the control plate 4. As the plate 40 moves, the reel stands 52, 53
The tape winding force is selectively transmitted to. FIG. 3 shows the normal rotation playback state. In this state, when the plunger 24 is sucked manually or automatically by detecting the end of the tape, the pin 35 of the arm 33 is moved to the normal rotation reproducing state. 36 and rotates the switching plate 36 clockwise, moves the control plate 40 in the direction of the arrow ○, switches the switching switch 41 to the reverse side, and moves the pinch roller 43 from the capstan 50. The pinch roller 44 is brought into pressure contact with the capstan 51, and the idler 54 is brought into rolling contact with the reel stand 53 to perform tape reversal playback. In addition, 59 is a center click spring, and the control board 40
is held in two positions: the normal dislocation layer and the reversed position.
As is clear from the explanation so far, the plunger 24
is originally intended to switch the tape constant speed running direction, but is used to pull the actuating rod 19 in the direction of arrow A only when the power is turned on. This plunger 24 is the actuating rod 19
If the tape is pulled in the forward and reverse directions at the same time, it is inconvenient that the tape will start playing in the reverse direction even though the user wishes to play the tape in the forward direction. Moreover, the load on the plunger 24 is doubled, which is disadvantageous in that the movement of the actuating rods 1 and 9 must be carried out reliably. Therefore, in this embodiment, the tape constant speed running direction is not switched during the suction operation of the plunger 24 when the power is turned on. This configuration will be explained using the drawings from FIG. 4 onwards.

Reference numeral 60 denotes 2 provided with the drive pin 35 sandwiched therebetween.
This is a drive pin positioning plate having two arms 60a and 60b, and this positioning plate 60 is rotatably supported by a shaft 61 on the substrate 7. A winding portion of a swing spring 62 is loosely wound around this shaft 61, and the two arm portions of this spring 62 are biased in a direction toward each other. And this spring 6
A pin 63 provided on the forward/reverse switching control plate 40 is interposed between the two arm portions of No. 2, and the tips and ends of the two arm portions are engaged with a raised piece 64 provided on the positioning plate 601. ing.
FIG. 5 is a perspective view of the vicinity of the positioning plate shown in FIG. 4, viewed from the back side of the device, and 65 is a hole provided in the positioning plate 60' to allow the pin 63 to pass therethrough. A pin 6 provided at one end of the rotating arm 26 shown in FIG.
6 is inserted and tied. Further, a positioning plate lock lever 68 is provided on the side of the drive pin positioning plate 60 and is rotatable about a shaft 67 on the board 7. A protrusion 70 that can be engaged with a recess 69 of this lever 68 is provided. is provided integrally with the positioning plate 881. This lock lever 68
The play rod 3 is always rotated in the direction of approaching the positioning plate 681 by a spring (not shown), but in the stopped state shown in FIG. is being prevented. The operation of the above embodiment will now be explained.

When the cassette is installed from the stopped state shown in Figure i, and the play rod 3 is pushed in the direction of arrow A, for example, the protrusion 3a of the play rod 3 moves along the tapered surface of the switch operation board. This switch operation board 5
6 in the direction of arrow C and turn on the power switch 6. When the power switch 6 is turned on, the plunger 24 performs a suction operation, moves the actuating rod in the direction of arrow A, and releases the lock plate turtle Q from being held in position by the rotating arm 1SI. With this release, the L lock plate is removed from the tension spring? 4, the fishing portion 13 locks the protrusion 3a of the play rod 3, and holds the play rod 3 at a thin operating position as shown in FIG. On the other hand, the electromagnet 28 is also activated at the same time as the plunger disk 4. A counterclockwise rotation urging force is applied to the lock arm 3, and when the operating rod 19 is brought to the operating position, the arcuate piece 38a of the lock arm 38 locks the roller 29 and the pin 2
Q is held at the oblique side of the deformation guide hole 21, so that even if the plunger 24 is returned to its original position, the actuating rod
remains locked in the operating position as shown in FIG. The device is thus in a regeneration state. In this state, the pin 2Q' of the operating rod wing 9 attempts to slide down the oblique side of the second deformation guide hole under the force of the tension spring 22. Since it is distributed and received by the arcuate side of the arcuate piece 30a of the arm 38, the force required to lock the actuating rod [3 is reduced, and the electromagnet 28 has a significantly smaller capacity than the plunger 241. You can do it.

Rewind rod turtle: If the fast forward rod 2 is pushed in, it will be locked in the same way.

To release the locking state of the tape running operating rod by the locking plate 10, by pushing the stop rod 4, the tape running operating rod, which is already locked in the operating position, is returned to its original position by the force of a spring (not shown). This can be done by turning the power switch 6 back off. This can also be done by cutting off the power supply and releasing the operating state of the electromagnet 28 without operating the stop rod 4. That is, when the electromagnet 28 comes to a halt, the actuating rod 9 is returned to its original position where the pin 20 rests against one end of the deformation guide hole 21 by the force of the tension spring 22, and this return force causes the rotating arm 15 to move. Rotate the counterclockwise in all directions and push the lock plate turtle Q in the direction of arrow C to unlock the tape running control rod.In a magnetic recording and reproducing device for car battles, this is the key to the car. Just return it to the off position and press L.
This means that the device automatically comes to a halt, which is also effective from the point of view of preventing performance deterioration of the device.On the other hand, when the plunger 24 is activated by turning on the power,
The operation of the drive pin 35 depends on how the drive pin 35 moves, and as is clear from FIG. One recess 37a of the anti-cut Takase slope 36
It is pushed and moved so that it is facing the .

Therefore, in this state, the drive pin 3 is
5 is moved in the direction of the arrow, the pin 35 simply enters the recess 37a of the cut f slope 36 and does not rotate the switching plate 36, but simply fires it blankly. Also, by pushing the play rod 3, the lock lever 6
8 is released, and the tapered end of the lever 68 comes into contact with the protrusion 70' of the positioning plate 68.
On the other hand, "the rotating arm 26 due to the operation of the plunger 24"
(See Figure 1) by rotating the pin 66 counterclockwise.
moves along the circumferential wall of the hole 65 of the positioning plate 60 and rotates the positioning plate 60 clockwise in FIG. The protrusion 70 is locked in the recess 69 of the lock lever 68, and the positioning plate 60 is moved between its two arm parts 60a.
, 60b are locked in positions unrelated to the drive pin 35. Therefore, from the second operation of the plunger 24, the drive pin 35 rotates the forward and reverse cutting sliding slope 36, thereby switching the constant speed running direction of the tape. Note that when the device is stopped while the tape is running in reverse, the friction spring 6 is moved due to the positional displacement of the pin 63 of the control plate 40, as shown in FIG.
Since the biasing direction of drive pin positioning plate 6 is rotated and biased in the clockwise direction without changing the biasing direction of drive pin positioning plate 2, the drive pin 35 is now positioned opposite to the other recess 37 of the forward/reverse switching plate 36. Plunger 24 will be retained and the next power up
During the operation, the drive pin 35 will be driven blank in the same way as described above. Figures 8 and 9 show the drive pin positioning plate 6.
8 shows another example of the motion control mechanism of No. 0. In the stopped state, as shown in FIG. However, once it enters the playback state, as shown in FIG. The pin 74 that stands up in the position enters the recess 75 in the hole 65 of the positioning plate 60 and locks the positioning plate 60, causing the two arm parts 60a and 60b to come to a position unrelated to the drive pin 35. I have to.

As described above, in this embodiment, the plunger 24 for switching the tape constant speed running direction is operated even when the power is turned on to move the operating rod 19 to the operating position, and at this time, the drive pin 35 is moved by the action of the positioning plate SQ. This prevents the load on the plunger 24 from increasing due to dry firing, and also prevents unnecessary forward/reverse switching operations from occurring. In addition, even if the electromagnet 28 is replaced with a plunger or the plunger 24 is replaced with an electromagnet in the above-described embodiment, the results are substantially the same. As explained above, the magnetic recording/reproducing device of the present invention utilizes the first electromagnetic drive means for switching the constant speed running direction of the tape in order to maintain the tape running state, and can maintain the device in the tape running state. In the initial operation process, which requires a large driving force to hold the pot in position, the first electromagnetic drive means is operated for a short time to achieve this, and the subsequent operation state is maintained by a separately provided second drive means. This is done by the operation of the electromagnetic drive means in 2.
The second electromagnetic driving means, which is kept in operation while the tape is running, has a capacity of 4.0 mm, which is sufficient, and the power consumption can be significantly reduced compared to the conventional one.

Furthermore, since the first electromagnetic drive means is for switching the tape constant speed running direction, this drive means can be effectively utilized and the structure can be simplified. Furthermore, when the first electromagnetic drive means is operated to maintain the tape running state, the drive pin for switching the tape constant speed running direction is driven dry by the action of the drive pin positioning plate, so that the plunger In addition, in the tape constant speed running state, the drive pin positioning plate is locked at a position not related to the drive pin. With this configuration, the switching operation of the constant speed tape running direction can be performed satisfactorily as before.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a stopped state of a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 2 is a plan view showing a playing state of the device, and FIG. 3 is a plan view showing the tape constant speed running direction switching of the device. A plan view showing the mechanism, FIG. 4 is a plan view showing the device in a stopped state in which normal rotation can be reproduced, FIG. 5 is a rear perspective view of the main part of FIG. 4,
FIG. 6 is a plan view showing the same device in a normal rotation playback state, FIG. 7 is a plan view showing the same device in a stopped state in which reverse playback is possible, and FIGS. 8 and 9 are other examples of the drive pin positioning mechanism. FIG. 3... Play rod, 5... Switch operation board, 6... Power switch, 7... Board t
10... Lock plate, 19... Operating rod, 24
... Plunger, 28 ... Electromagnet, 30 ...
・Lock arm, 35... Drive pin, 36...
...Forward/reverse switching plate, 40... Forward/reverse switching control plate, 60... Drive pin positioning plate, 62... Spring, 68... Lock lever. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. A control plate for switching the tape constant speed running direction, a switching plate connected to this control plate, a drive pin selectively engaged in two recesses of this switching plate, and this pin. The first to drive
A magnetic recording and reproducing device comprising an electromagnetic driving means,
a movable lock plate for locking the tape running operating rod in the operating position; and a movable lock plate for displacing the lock plate to a position where the rod can be locked, and brought to the operating position by the first electromagnetic driving means. a locking mechanism for locking the actuating rod in the operating position; a second electromagnetic drive means for holding the locking mechanism in a lockable state; and a drive pin positioning plate that is biased by the biasing means and forcibly displaces the position of the drive pin. The switching plate is biased so as not to rotate, and when the tape running control rod is operated and the power is turned on, the first electromagnetic drive means operates for a short period of time, causing the drive pin to run blank and also operating. The rod is driven to bring the locking plate to the lockable position, and the second electromagnetic drive means is actuated to lock the actuating rod in the actuation position, and while the second electromagnetic drive means is actuated. , a magnetic recording and reproducing device configured such that a tape running operating rod is held in an operating position. 2. The drive pin positioning plate is configured to be locked at a position away from the drive pin by the first operation of the first electromagnetic drive means or by the operation of the tape constant speed running control rod. The magnetic recording and reproducing device according to scope 1.