JPH0337144Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tape fast-forwarding device, and particularly to a tape fast-forwarding device suitable for an auto-reverse type tape recorder.

[Background of the idea]

In general, a tape recorder runs the tape at a constant speed during recording and playback, and at other times fast forwards in the same direction and fast forwards in the opposite direction, i.e., winds the tape. It has a structure that allows rewind. For this reason, many tape recorders are equipped with a forward fast-forward mechanism (hereinafter referred to as "FF mechanism") and a fast-forward mechanism for rewinding (hereinafter referred to as "REW mechanism").

On the other hand, in an auto-reverse tape recorder, the tape running direction is reversed, so
For example, what was previously recorded and played in the normal direction of travel will now be recorded and played in the reverse direction, and the contents of the FF and REW mechanisms will be reversed. For this reason, what operates as an FF mechanism during normal operation becomes a REW mechanism during auto-reverse, which is not only confusing in operation but also prone to erroneous operation.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional device by making it possible to set either the auto-reverse state or normal driving state, forward or reverse rapid forwarding, by the same operation of the setting mechanism, and also to An object of the present invention is to provide a tape fast-forwarding mechanism that can prevent overloading of a drive source or deformation or abrasion of members due to troubles caused by such problems.

[Summary of the idea]

In order to achieve the above object, the present invention includes a switching mechanism for switching between an auto-reverse state and a normal feeding state, a fast-forward switching means for switching between forward and reverse fast forwarding of the tape, and a switching mechanism for switching between forward and reverse fast forwarding of the tape. A setting mechanism to be set and a switching link base are disposed between the switching mechanism and the setting mechanism, and the same setting mechanism can be used to perform either forward or reverse fast forwarding in an auto-reverse state or a normal running state. In the tape fast-forwarding mechanism that makes it possible to set the switching mechanism, the switching plate constituting the switching mechanism and the switching link base are engaged through an elastic body, so that even if there is trouble during switching operation and the switching link base does not operate,
A feature is that the switching link base and the switching plate are engaged with each other via an elastic body so that the operating force of the switching plate is not directly transmitted to the switching link base.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, in FIGS. 1 and 4, reference numeral 1 indicates a chassis, and reference numerals 2 and 3 indicate capstans which are individually driven to rotate by being energized by a motor (not shown). Pinch roller mechanisms 4 and 5 are provided corresponding to each of these capstans 2 and 3. One of the pinch roller mechanisms 4 includes a pinch roller 4A, a bracket 4B that pivotally supports the pinch roller 4A, a support shaft 4C formed at the left end of the bracket 4B in FIG. When the bracket 4B is rotated as described above about the support shaft 4C, the pinch roller 4A is applied to the capstan 2. It is mounted on the chassis 1 so as to be able to abut against it. Also,
The other pinch roller mechanism 5 is installed in a symmetrical position with respect to the one pinch roller mechanism 4 described above, as shown in the figure, and similarly includes a pinch roller 5A, a bracket 5B that pivotally supports the pinch roller 5A, and a bracket 5B that supports the pinch roller 5A. Support shaft 5 formed at the right end in Fig. 1
C, and a spring (not shown) that applies a counterclockwise rotating force to the bracket 5B using the support shaft 5C as a fulcrum, and rotates counterclockwise as described above with the support shaft 5C as a fulcrum. When the pinch roller 5A rotates, the pinch roller 5A
It is installed on the chassis 1 so that it can come into contact with the chassis 1. During recording or playback, one of the pinch rollers 4A or 5A and the capstan 2 or 3 always comes into contact with each other, pinching a tape (not shown) and applying a predetermined running speed to the tape. I'm starting to do that.

Specifically, the case shown in FIG. 1 in which the pinch roller 4A is in contact with the capstan 2 indicates a normal state (not during auto-reverse), while the other pinch roller 5A is in contact with the capstan 3. The case shown in FIG. 4 indicates that the vehicle is in auto-reverse mode.

Each bracket 4 of the pinch roller mechanisms 4 and 5
Relatively small guide rollers 4D, 5D are pivotally supported at each rotating end of A, 5A, and a switching plate 11 of an auto-reverse/normal travel switching mechanism 6 is engaged with each guide roller 4D, 5D. has been done.

The auto-reverse and normal driving switching mechanism 6
shows a switching gear 10 and a switching plate 1 that is engaged with the switching gear 10 and slides to the left in FIG.
1, a lock lever 12 for stopping the rotation of the switching gear 10, and a solenoid 13 for releasing the lock lever 12 from the locked state.

Among these, the switching gear 10 has a notch 10
A is formed in two places separated by 180 degrees, and a lock pin 10B is provided at each intermediate point on the substantially same circumference, and is further rotated clockwise in the figure by a pressure spring (not shown). The rotational force is always energized. Further, the lock lever 12 is interposed between the switching gear 10 and the solenoid 13, and locks the lock pin 10B of the switching gear 10, or is biased by the plunger 13A of the solenoid 13 to lock the lock pin 10B in its engagement. It functions to release from the stopped state. moreover,
The switching plate 11 is formed to be slidable in the left-right direction in FIG. 1 while being guided by guide portions 11A and 11B provided at two locations. A driven bent portion 11C is provided corresponding to the locking pin 10C. Also, the bent portion 11C of the switching plate 11
In the upper part in the same figure, there is a cam crest 1 corresponding to the guide roller 4D of the pinch roller mechanism 4 described above.
4 is formed, and a square through hole 11 in the center thereof is also formed.
A cam ridge portion 15 corresponding to the guide roller 5D of the other pinch roller mechanism 5 is formed on E. When the switching plate 11 is moving to the right as shown in FIG. 1, these cam ridges 14 and 15 guide the one guide roller 4D downward as shown in the figure, and It is formed to guide the other guide roller 5D upward in the figure, and when the switching plate 11 is moving to the left as shown in FIG. As well as guiding the other guide roller 5D downward in the figure, as described above, one pinch roller 4A and the capstan 2 are in contact with each other in the normal case, and in the case of auto-reverse. The other pinch roller 5A and the capstan 3 come into contact with each other, thereby making it possible to reverse the direction of tape running.

The capstans 2 and 3 are each integrally equipped with a flywheel (not shown), relatively large spur gears 20 and 21, and relatively small spur gears 22 and 23, respectively. Furthermore, spur gears 24 and 25, which are slightly smaller than the spur gears 20 and 21, are mounted on each reel shaft (not shown) in each reel section located below each of the flywheel sections in FIG.
is integrally formed with. As shown in FIG. 1, a fast-feeding switching mechanism 30 is disposed approximately in the middle of each of these reel parts, and an automatic switching link part 40 for fast-feeding that engages with this fast-feeding switching mechanism 30 is provided. This automatic switching link portion 40 and the rapid forward switching mechanism 30 form an automatic switching means for auto reverse. The automatic switching link section 40 is connected to a fast forward setting mechanism 50 for external operation and a rewind setting mechanism 60 for setting reverse fast forwarding. Further, the fast-forward switching mechanism 30 includes an L-shaped link 31 and a rising portion 3 of the L-shaped link 31 in FIG.
1A, an arm section 33 mounted in a stacked manner on the L-shaped link 31 with the U-shaped spring 32 stacked therebetween, and a rotatable member at the tip of the arm section 33. The idler gear 34 is equipped with the idler gear 34. Of these, the arm portion 33 has a long hole 33A formed at its lower end in FIG. 1, and in this long hole 33A portion,
It is rotatably supported by a spindle pin 31B implanted in the standing portion 31A of the L-shaped link 31 described above. Further, this arm portion 33 is fixedly equipped with an arm-side locking pin 33B slightly above the spindle pin 31B portion, followed by an L-shaped link located slightly above the arm-side locking pin 33B. The link side locking pin 3 is attached to the rising portion 31A of 31.
1C is fixedly equipped. Each of these locking pins 31C and 33B has an end portion of U.
It is in a state where it is held between the letter-shaped springs 32.

Therefore, the arm portion 33 and the idler gear 34 can rotate in the directions A and B in FIG.
The structure is such that the return to the original position by the letter-shaped spring 32 is carried out very naturally, and therefore the L-shaped link 31 is rotated as shown in FIG. When the gears are moved, this allows the idler gear 34 to mesh with the spur gears 20 and 24 simultaneously and smoothly under an appropriate pressing force.

Further, the automatic switching link section 40 for rapid forwarding
First, it has a switching link base 41 that is locked to the switching plate 11 of the auto-reverse mechanism 6 described above and reciprocates in the left-right direction in FIG. It is equipped with a locking pin, etc. To explain this in more detail, the switching link base 41 includes a driving section 41A disposed vertically at the right end in FIG. It is integrally formed with an operating part 41B that extends while bending, and guide parts 42A, 42 provided at three locations.
It is configured to be able to slide back and forth in the left and right directions in the figure as described above while being guided by B and 42C. A diamond-shaped link 42 is rotatably mounted on a support shaft 42D implanted on the operating portion 41B of the switching link base 41. Three locking drive pins 43, 44, and 45 are implanted in this diamond-shaped link 42. Among these, the first and second locking drive pins 43 and 44 are connected to a diamond-shaped link 4 as shown in FIG.
The third locking drive pin 45 is installed on both left and right ends of the
It is planted close to the locking drive pin 43 and on the right side thereof, facing toward the back of the page. For this reason, a concave relief is provided in the switching link base 41 portion located on the back side of the left side portion in FIG. A third locking drive pin 45 of the diamond-shaped link 42 is inserted into an elongated hole (not shown) provided in the rotation end 31A in the left-right direction in the figure. It is in an engaged state.

Therefore, when the diamond-shaped link 42 rotates clockwise on the paper surface of FIG. The letter-shaped link 31 is rotated counterclockwise (direction A in the figure) as described above using the guide 42A as a fulcrum. Similarly, when the rhombic link 42 rotates counterclockwise about the support shaft 42D, the third locking drive pin 4
Similarly, the L-shaped link 31, which is locked to 5, can be rotated clockwise (direction B in the figure) using the support shaft 42A as a fulcrum. The switching link base 41 equipped with the diamond-shaped link 42 functioning in this manner is configured to be reciprocated in the left-right direction in FIG. 1 along with the switching operation of the auto-reverse mechanism 6, as described above.

Further, a setting mechanism is configured to externally operate the diamond-shaped link 42 via the first locking drive pin 43 and the second locking drive pin 44 to set either forward or reverse fast forwarding. As a specific configuration, the fast forward setting mechanism 50 and the rewind setting mechanism 60 are as follows.
They are provided corresponding to the respective locking drive pins 43 and 44, respectively. Each of these lever mechanisms 50, 60
is guided by common guides 70 and 71 to be able to slide in directions C and D in FIG. It is constructed so that it can sufficiently perform its original functions as shown below in response to the reciprocating movement of the robot.

The fast-forward setting mechanism 60 includes a fast-forward push button 51 and a fast-forward plate-like lever 52 integrated with the fast-forward push button 51. This plate-like lever 52 has the diamond-shaped link 4
2, each of the first and second locking drive pins 43, 44
Locking notches 52A and 52B are formed for locking either one of the diamond-shaped links 42 as necessary to apply a predetermined rotational force to the diamond-shaped link 42. Specifically, one notch 52A is connected to the diamond-shaped link 4.
is formed corresponding to the first locking drive pin 43 of No. 2,
The other notch 52B is formed to correspond to the second locking drive pin 44 of the rhombic link 42.
In the state shown in FIG. 1, when the fast-forwarding push button 51 is pressed, the plate lever 52 locks the first locking drive pin 43 of the diamond-shaped link 42 and rotates the diamond-shaped link 42 clockwise. This causes the L-shaped link 31 to rotate in the direction A in the figure.

The rewind lever mechanism 60 also includes a rewind press button 61 and a rewind press button 61.
It has a plate-like lever 62 for rewinding which is integrated with the. This plate-like lever 62 for rewinding has
Similar to the above-mentioned rapid-forwarding plate-like lever 52, each of the first and second locking drive pins 4 of the diamond-shaped link 42
Lock either one of 3 and 44 as necessary,
Locking notches 62A and 62B are formed to apply a predetermined rotational force to the diamond-shaped link 42. Specifically, one notch 62A corresponds to the first locking drive pin 43, and the other notch 62B
are formed corresponding to the second locking drive pins 44, respectively. In the state shown in FIG. 1, the above-mentioned fast forward setting mechanism 50 is configured to lock the first locking drive pin 43, whereas the rewind setting mechanism 60 has a rewind press button. 61
By pressing , the other notch 62B first locks the second locking drive pin 44 and rotates the diamond-shaped link 42 counterclockwise, thereby causing the L-shaped link 31 to rotate in the same figure. It is designed to rotate in direction B.

In addition, the switching plate 11 and the switching link base 41
The engagement structure is shown in detail in FIGS. 7 and 8, and is as follows. That is, a bent portion 80 protruding to both sides is formed at the end of the hanging foot portion 11D of the switching plate 11, and a protruding portion 91 is also formed in the hole 90 at the upper part of the switching link base 41. Bent pieces 92 are formed on both sides. Then, one of the arms 100b and 100c of the helical spring 100, which has the winding part 100a supported by a spring support 93 erected at the approximate center of the switching link base 41, is connected to the bent piece 92 of the protruding part 91. One side is pressed against the other, and the other side is pressed against one side of the bent portion 80 of the hanging leg portion 11D.

Other components (not shown), such as the operation and configuration of each part during recording or playback, are the same as those of the prior art.

Next, the overall operation of the above embodiment will be explained.

First, FIG. 1 shows a state in which the tape is running in the normal direction and recording or playback is being performed under such conditions. Next, fast forwarding in the same traveling direction is performed by pressing the fast forwarding push button 51 of the fast forwarding setting mechanism 50. In this case, the pinch roller 4A is urged by the switching plate 11 of the auto-reverse mechanism 6,
It is designed so that it is slightly separated from the capstan 2 that is in contact with it. At the same time, each part
It operates as shown in the figure. That is, the notch 52A of the fast-forwarding plate-like lever 52 is connected to the first locking drive pin 4.
3 and rotates the rhombic link 42 clockwise, thereby rotating the L-shaped link 31 in the direction A as described above and moving the idler gear 34 to the spur gear 2.
Mesh to 0,24. Therefore, the rotation of the spur gear 20 is transmitted to the spur gear 24 of the reel section via the idler gear 34, causing the reel section to rotate at high speed.
This sets the tape running to fast forward mode.

On the other hand, in order to rewind in the state shown in FIG. 1, that is, when the tape is running in the normal direction, the rewind push button 61 of the rewind setting mechanism 60 must be pressed in the state shown in FIG. It is carried out by. In this case, each part operates as shown in FIG. That is, the notch 62B of the rewinding plate lever 62 locks the second locking drive pin 44 and rotates the diamond-shaped link 42 counterclockwise, thereby moving the L-shaped link 31 in the B direction as described above. , and the idler gear 34 is simultaneously engaged with the spur gears 21 and 25. Therefore, the rotation of the spur gear 21 in the reverse direction is transmitted to the spur gear 25 of the reel section via the idler gear 34, causing the reel section to rotate at high speed in the rewinding direction, thereby bringing the tape into the rewinding state. Set.

Next, each operation of fast forwarding and rewinding the tape during auto-reverse will be explained.

To enter the auto-reverse state, first the auto-reverse mechanism 6 operates as shown in FIG. Specifically, the solenoid 13 is first activated to release the lock pin 10B of the switching gear 10 from the locked state. At the next moment, the switching gear 10 meshes with the small gear 22 and rotates clockwise (direction E in Figure 1), and the switching plate 11 is rotated by the locking pin 10C provided on the switching gear 10 as shown in Figure 1. is moved to the left. Therefore, the one pinch roller 4A is released from the contact state with the corresponding capstan 2 by being guided by the cam ridges 14 of the switching plate 11, and the other pinch roller 5A is guided by the cam ridges 14 of the switching plate 11. Capstan 3 that responds by being guided by
It is set so that it comes into contact with. At the same time, the right bent portion 80 of the switching plate 11
00c, the left bent portion 80 presses the left arm 100b, and as the bent portion 80 moves, the coiled spring 10
0's right arm 100c and the right bending piece 92 of the switching link base 41 apply pressure. During this operation, the left bending piece 92 of the switching link base 41 is separated from the left arm 100b of the coil spring 100, so the right arm 100c of the coil spring 100 moves the switching link base 41 to the left (direction F) in FIG. Move to. Therefore, the operating force of the switching plate 11 is transmitted to the switching link base 41 via the coiled spring 100. As the switching link base 41 moves, the above-mentioned rhombic link 42 also moves to the left together with the switching link base 41, so the arrangement of each locking drive pin 43, 44, 45 provided on the rhombic link 42 is The position is as shown in FIG. 4, which is different from that in FIG.
Specifically, the first locking drive pin 43 corresponds to the notch 62A formed in the rewinding plate lever 62 of the rewinding mechanism 60 described above, and the second locking drive pin 44 corresponds to corresponds to the notch 52B of the plate-like lever 52 for rapid forwarding described above.

To fast-forward the tape during auto-reverse as shown in FIG. 4, the fast-forward push button 51 of the fast-forward setting mechanism 50 can be pressed in exactly the same way as in FIG. 1 described above. In this case, since the tape running is reversed as described above, on the winding reel side, the unwinding reel part in the case of FIG. The example has a configuration that fully satisfies this need.

That is, as described above, first, the fast-forward press button 51 in FIG. 4 is pressed. In this case as well, the pinch roller 5A is biased by the switching plate 11 of the auto-reverse mechanism 6 and is slightly separated from the capstan 3 with which it is in contact. At the same time, each part operates as shown in FIG. To explain this more specifically, the notch 52B of the fast-forwarding plate lever 52 locks the second locking drive pin 44 and rotates the diamond-shaped link 42 counterclockwise, thereby causing the L as described above. Rotate the shaped link 31 in the direction B, and the idler gear 34
mesh with the spur gears 21 and 25 at the same time. In this case, since the rotation of the spur gear 21 remains as it is for fast forwarding during auto-reverse, the high-speed rotation is transmitted to the spur gear 25 of the reel section via the idler gear 34. Fast forwarding of time is easily set by the same external operation as in the normal case (not during auto-reverse) described above.

On the other hand, in order to rewind during auto-reverse, press the rewind button 6 in FIG.
This is done by pressing 1. in this case,
Since this is rewinding during auto-reverse, there is a need for the fast-forwarding reel in the case of FIG. 1 described above to function as a rewinding reel on the reel side. It has a structure that fully satisfies the following. That is, when the rewind button 61 shown in FIG. 4 is pressed, each part in this case operates as shown in FIG. 6. To explain this in more detail, the notch 62A of the rewinding plate lever 62
locks the first locking drive pin 43 and locks the rhombic link 4
2 in the clockwise direction, thereby rotating the L-shaped link 31 in the A direction as described above, and causing the idler gear 34 to mesh with the spur gears 20 and 24 at the same time. In this case, since the rotation of the spur gear 20 becomes the rotation for rewinding, the idler gear 3
The high-speed rotation is transmitted to the spur gear 24 of the reel section through the gear 4, and thereby, rewinding during auto-reverse can be easily performed by the same external operation as in the normal case (not during auto-reverse) described above. Set.

Furthermore, in the event that the switching link base 41 is overloaded and cannot be moved during the switching movement of the switching plate 11, for example in the state shown in FIG. If the first locking drive pin 43 is kept pushed up, the end of the locking drive pin 43 will move to the plate-shaped lever 6.
2 and may prevent the movement of the switching link base 41, but even in such a case,
One arm 100b, 100 of the helical spring 100
c and one bent portion 80 of the switching plate 11 come into contact with each other, and press the helical spring 100 to bend regardless of the movement of the switching plate 11.
The operating force of the switching plate 11 is not directly transmitted to the switching link base 41. Therefore, even in the above-mentioned case, it is possible to prevent overload on the motor serving as the drive source, or deformation and wear of the switching plate 11 and the switching link base 41.

In addition, although the helical spring 100 was illustrated as an elastic body in the above embodiment, the shape and structure of the helical spring 100 are not limited to this.

[Effect of idea]

As explained above, according to the present invention, it is possible to set either auto reverse or forward/reverse fast forward in normal driving conditions by the same operation of the setting mechanism. Even if the members do not move smoothly, it is possible to provide a tape fast-forwarding mechanism that can prevent overload on the drive source, deformation and wear of the members, and improve durability.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted plan view showing an embodiment of the present invention, Figs. 2 and 3 are explanatory diagrams of the operation of Fig. 1, and Fig. 4 is a case in which Fig. 1 is switched during auto-reverse. FIG. 5 and FIG. 6 are respectively explanatory diagrams of the operation of FIG. 1, FIG. 7 is an explanatory diagram showing the engagement relationship of the main parts, and FIG. 8 is an illustration of the engagement of the main parts. FIG. 6...Switching mechanism, 11...Switching plate, 30...
...Fast forward switching mechanism, 41... Switching link base, 50, 60... Setting mechanism, 100... Elastic body.

Claims (1)

[Scope of utility model registration request] a switching mechanism for switching between an auto-reverse state and a normal feeding state, a fast-forward switching means for switching between forward and reverse fast-forwarding of a tape, a setting mechanism for setting either forward or reverse fast-forwarding, and the switching mechanism and settings. In a tape fast forwarding mechanism, a switching link base is disposed between the tape fast forwarding mechanism and the tape fast forwarding mechanism, and the same setting mechanism can be used to set either forward or reverse fast forwarding in an auto-reverse state or a normal running state,
A tape fast-forwarding mechanism characterized in that a switching plate constituting the switching mechanism and a switching link base are engaged with each other via an elastic body.