JPH042434Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a tape guide drive device for loading a magnetic tape in, for example, a helical scan type magnetic recording/reproducing device.

<Background Art and its Problems> Conventionally, in a magnetic recording/reproducing device, a tape guide with which the magnetic tape engages is attached to a rotating arm as a tape guide drive device provided for loading a magnetic tape. Rotate the moving arm to move the tape guide above,
A device has been proposed in which the magnetic tape is pulled out from a tape cassette, for example, and guided so as to travel freely at a predetermined loading position. In this tape guide drive device, the tape guide is attached to one end of the rotating arm, the other end of the rotating arm is supported by a spindle, and the spindle is rotated by a drive motor or the like to drive the tape. The guide is designed to rotate.

By the way, the drive motor that serves as the drive source for such a tape guide drive device has rotational errors due to mechanical inertia, and it is difficult to position and hold the tape guide at a predetermined loading position with high precision. It is.

Therefore, in such a tape guide drive device, the rotating arm is rotated via a limiter mechanism to position and hold the tape guide at a predetermined position regardless of the rotational error of the drive motor. There is. That is, in the tape guide drive device, a first support shaft driven by the drive motor and a second support shaft that supports the rotating arm are provided, and a limiter plate is attached to each of these support shafts, A limiter coil spring is spanned between these limiter plates, and a regulating member is provided on the chassis or the like for regulating the rotation of the limiter plate on the rotating arm side at a predetermined loading position.

Such a tape guide drive device rotates a first support shaft by the drive motor, rotates a second support shaft by the tension of the coil spring, and moves the tape guide to a predetermined position. Moving.
The second support shaft, which has rotated to the predetermined position, is stopped at the predetermined position by the regulating member against the tension of the coil spring. In this way, the tape guide is positioned and held at a predetermined position by the regulating member without being affected by rotational errors of the drive motor.

However, in a tape guide drive device equipped with a limiter mechanism having such a coil spring, when abnormal tension occurs in the magnetic tape engaged with the tape guide, the rotating arm resists the tension of the coil spring. This may cause the magnetic tape to become unstable in its guiding state. If the spring constant of the coil spring is increased in order to prevent the rotation arm from rotating due to such abnormal tension of the magnetic tape, it becomes difficult to attach the coil spring to the limiter plate. I get used to it.

In addition, in such a tape guide drive device, the drive motor serving as its drive source is connected to the drive source of another device provided in the magnetic recording/reproducing device, such as a drive device for a pinch roller that has two operating states. There are cases where you may want to use it as a . In such a case, even after the rotation of the rotation arm is stopped by the restriction member, the drive motor continues to drive for the pinch roller drive device, etc., and the rotation of the rotation arm is stopped by the restriction member. The shaft rotates significantly despite the stoppage of the second support shaft, thereby greatly stretching the coil spring. Therefore, if such a coil spring with a large spring constant is used, the load applied to the drive motor will be extremely large, and the strength of each of the support shafts and limiter plates will also be increased. It is necessary to do so.

<Purpose of the invention> In view of the above-mentioned circumstances, the present invention is capable of firmly holding the tape guide in a predetermined position, is easy to assemble without the need for a coil spring with a large spring constant, and is easy to assemble with other devices. An object of the present invention is to provide a tape guide drive device that can easily be used as a drive source for both.

<Summary of the invention> In order to achieve the above-mentioned purpose, the tape guide drive device of the magnetic recording/reproducing device according to the invention has a first rotating support shaft to which the driving force of the drive motor is transmitted and rotated. A drive wheel is provided with an attached arc-shaped fitting part and has an engagement pin planted thereon, and a second rotating support shaft is attached and rotatably supported with a rotating arm to which a tape guide is attached. and a driven wheel provided with at least one engagement groove into which the above-mentioned engagement pin is engaged, and at least a pair of fitting recesses into which the above-mentioned fitting portions are fitted relative to each other across the engagement groove. When the driving wheel is rotated by the driving motor, the engaging pin of the driving wheel engages with the engaging groove of the driven wheel to rotate the driven wheel, and one of the driven wheels is rotated. A state in which the fitting portion of the driving wheel is fitted into the fitting recess and the driven wheel is fixed, and a condition in which the fitting portion of the driving wheel is fitted in the other fitting recess of the driven wheel and the driven wheel is fixed. The vehicle can be selectively switched between a stationary state and a fixed state.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In this embodiment, a magnetic recording and reproducing apparatus equipped with a tape guide drive device according to the present invention is provided with a rotating drum 2 to which a rotating magnetic head 1 is attached, as shown in FIG. 1, for example. The magnetic tape 4 stored in the tape cassette 3 to be loaded is automatically loaded onto the rotating drum 2. That is, from the unloading state shown in FIG. 1, the magnetic tape 4 is placed between a pair of tape guide blocks 5, 5, a plurality of tape guides 6, and a loading mechanism provided in this magnetic recording/reproducing apparatus.
7, 7, pinch roller 8, etc., as shown in FIG. It's starting to get passed around. In this loading state, the pinch roller 8 is moved to a position near the capstan 11, and is positioned and held at a position apart from the capstan 11, so that the magnetic tape 4 can be rapidly fed.

In this embodiment, each tape guide 6, 7, 7 and pinch roller 8 are driven by a single drive motor 12 and a single drive motor 12 constituting a pinch roller drive device, as shown in FIGS. 3 and 4. It is designed to be driven by a single drive shaft 13 driven by a drive motor 12.

The pinch roller 8 is arranged on a sub-chassis 16 supported by a plurality of supports 15 on a main chassis 14 provided in the magnetic recording/reproducing apparatus, and is rotated by the sub-chassis 16. It is attached together with the tape guides 7, 7 to a freely attached attachment arm 17.

The mounting arm 17 has one end attached to a support shaft 19 vertically and rotatably provided in a bearing housing 18 provided on the sub-chassis 16 via an oil-impregnated bearing (not shown). It is designed to rotate horizontally. The pinch roller 8 and tape guides 7, 7 are mounted on the other end of the mounting arm 17, which pivots around the support shaft 19, while being held in parallel with each other by a pair of mounting plates 20, 20. By rotating the mounting arm 17, the mounting arm 17 is rotated in parallel. That is, the pinch roller 8 and the tape guides 7, 7
Due to the rotation of the mounting arm 17, the pinch roller 8 is moved from the first rotation position shown in FIG. 4th spaced apart from 11
The pinch roller 8 is moved to the second rotation position (pinch OFF state) shown in the figure, and the rotation of the mounting arm 17 causes the pinch roller 8 to move to the capstan 1.
3rd rotation position to crimp to 1 (pinch ON state)
will be moved to

In the pinch ON state, the pinch roller 8 presses the capstan 11 through the magnetic tape 4 and guides the magnetic tape 4 to run at a constant speed. Further, the tape guides 7, 7 move together with the pinch roller 8, and the magnetic tape 4
is pulled out from the tape cassette 3, and when the magnetic tape 4 is fast forwarded in the pinch OFF state, the running of the magnetic tape 4 is guided at an appropriate position.

Then, a mounting arm 17 to which such a pinch roller 8 and tape guides 7, 7 are mounted is attached.
A regulating member 21 is provided on the sub-chassis 16, and the first rotational position where the rotation is regulated by the regulating member 21 and the pinch roller 8 are in pressure contact with the capstan 11, thereby causing rotation. It can be rotated between a third rotation position where movement is restricted, and is made up of a pair of links 23, 24 and a toggle spring 25 by rotation of a rotation shaft 22 provided on the sub-chassis 16. It is designed to be rotated via a link mechanism.

The rotation shaft 22 is rotatable by a bearing housing 26 provided on the sub-chassis 16, a pair of oil-impregnated bearings 27, 27 attached thereto, and a thrust bearing (not shown) attached to the main chassis 14. One link 23 of the link mechanism is attached to the distal end facing the mounting arm 17 side, and a first link 23 is attached to the proximal end.
A worm wheel 28 and an engaging member 29 are attached.

One link 23 of the link mechanism has a radial insertion hole formed in the rotation shaft 22, is inserted into this insertion hole, and has a first stopper for preventing it from coming off at the tip that protrudes from the insertion hole. 30 is attached to the rotation shaft 22. and,
A second clasp 31 is attached to the middle part of this one link 23, and this second clasp 31
The toggle spring 25 is provided between the rotating shaft 22 and the rotating shaft 22.
are arranged. This toggle spring 25 elastically urges the one link 23 toward the other end, that is, toward the connecting portion with the other link 24. The other link 24 has one end connected to the one link 23 at the connecting portion, and the other end rotatably connected to the other end of the mounting arm 17 to which the pinch roller 8 and the like are attached. .

In such a link mechanism, when the pinch roller 8 is in the unloading state at the first rotational position, the links 23 and 24 are bent into a substantially doglegged shape with an acute angle to each other. , when the rotation shaft 22 rotates, the one link 23
rotates, and rotates the mounting arm 17 via the other link 24. With this rotation, the links 23 and 24 gradually expand as the distance between the other end of the mounting arm 17 and the rotation shaft 22 increases. Furthermore, with the pinch roller 8 placed in the third rotational position, the one link 23 is moved onto a line connecting the rotation shaft 22 and the capstan 11, and The link 23 and the other link 24 are placed in a straight line. In this state, the length of each of the links 23 and 24 is the same as that between the other end of the mounting arm 17 and the rotation shaft 2.
2, and one end of the one link 23 protrudes from the insertion hole of the rotation shaft 22. In this way, the rotation shaft 2
2 and a second stopper 31 provided on one link 23
The distance between the toggle spring 25 and the toggle spring 25 is reduced, and the resilient force of the toggle spring 25 acts on the other end of the mounting arm 17 to press the pinch roller 8 mounted thereon against the capstan 11.

The engaging member 29 attached to the rotating shaft 22 has a rotatable roller 32 at its tip, and this roller 32 connects to a cam body 33 which will be described later.
When the cam body 33 comes into contact with the rotating cam body 33, the frictional force generated between the cam body 33 and the rotating cam body 33 is reduced.

Further, the rotation shaft 22 is connected to the drive motor 12.
For example, the first worm gear 34 and a pair of limiter springs 35, 3 serve as biasing means driven by the
The first worm wheel 28 provided at the base end meshes with the first worm gear 34 and is rotated thereby. It's summery.

As shown in FIG. 5, in the limiter mechanism, the drive shaft 13 driven by the drive motor 12 is inserted into a first worm gear 34 formed in a substantially cylindrical shape, and the first worm gear 34 is connected to both ends of the drive shaft 13. The drive shaft 13 is elastically biased in the axial direction by limiter springs 35, 35 disposed in the drive shaft 13. The first worm gear 34 has a pair of through holes bored in the radial direction at one end, and a slide pin 36 is inserted into the through holes and fixed by a retaining ring 37. 36 is inserted into an axially long elongated hole 38 formed in the drive shaft 13, so that it can be displaced only in the axial direction of the drive shaft 13 within the diameter of the elongated hole 38. It's summery. In addition, each of the limit springs 35, 3
Reference numeral 5 denotes locking step portions 3 formed on the drive shaft 13 corresponding to both ends of the first worm gear 34.
positioning washers 40, 40 whose positions are regulated by 9, 39 and are movable only in one direction, respectively;
Fixing members 41, 4 attached to the drive shaft 13
It is placed between 1 and 1. In the limiter mechanism configured in this way, the first worm gear 34
When the load on the first worm wheel 28 meshing with is small, the first worm gear 34 is
The elastic force of each limiter spring 35, 35 rotates the first worm wheel 28 at the reference position shown in FIG. Then, when the load applied to this first worm foil 28 increases,
This load stops the rotation of the first worm wheel 28, and the rotating worm gear 34 resists the elastic force of one of the limiter springs 35, 35, as shown in FIG. 6 or 7. and is displaced based on the amount of rotation. The limiter mechanism having such a structure has a simpler structure, fewer parts, and is easier to assemble than a case in which a limiter spring is provided that directly biases the rotating shaft 22 in the direction around the axis. Note that in this limiter mechanism, instead of providing the slide pin 36, retaining ring 37, etc. to make the first worm gear 34 freely displaceable only in the axial direction, for example, the outer wall surface of the drive shaft 13 and the first worm gear
The inner wall surface of the first worm gear 34 may be provided with axial protrusions and grooves that engage with each other, and the first worm gear 34 may be configured to be slidable only in the axial direction.

Further, a cam body 33 is provided on the main chassis 14 and serves as a regulating means for regulating the rotation of the rotation shaft 22 and positioning and holding the pinch roller 8 in a second rotation position, that is, in the pinch OFF state.
In order to drive this cam body 33, a second worm wheel 43 that meshes with a second worm gear 42 provided on the drive shaft 13 is provided. The cam body 33 and the second worm foil 43
are integrally connected by a connecting shaft 44 and rotatably supported by the main chassis 14.

The second worm gear 42 is connected to the drive shaft 13
The second worm wheel 43 and the cam body 33 are rotated by the driving of the drive motor 12.

The cam body 33 rotated in this way is
As shown in the figure, an engaging member 29 provided on the rotating shaft 22 is brought into contact with the rotating shaft 22, and the rotating position of the engaging member 29 is regulated, and the rotating shaft 22 is rotated in a predetermined direction. It is to be stopped at a certain position. As shown in FIG. 8, the cam body 33 has a first regulating surface 46 on which the engaging member 29 comes into contact, and a tapered surface 47 continuous with the first regulating surface 46, on a disc-shaped cam base plate 45. The first cam piece 48 is formed with a second cam piece 50, and the second cam piece 50 is formed with a second regulating surface 49 that is continuous with the tapered surface 47. These cam pieces 48 and 50 have a plurality of elongated holes 51 and 52 formed therein, and are screwed to the cam base plate 45 through these elongated holes 51 and 52, so that the protrusion of each of the regulating surfaces 46 and 49 The amount can be finely adjusted.

In the pinch roller drive device with this configuration,
In the unloading state, as shown in FIG. 9, the mounting arm 17 is positionally regulated by the regulating member 21 against the biasing force of the limiter mechanism, and the pinch roller 8 is moved to the first position. It is held in a rotating position. That is, in this state,
The drive motor 12 drives the pinch roller 8 to a first position.
It is reversely driven in a direction further away from the capstan 11 from the rotational position of and stops with one limiter spring 35 of the limiter mechanism being compressed.
The pinch roller 8 is held at a predetermined rotational position regardless of the stop position of the drive motor 12. In this way, the pinch roller 8
It is positioned at the first rotational position with high precision without being affected by drive errors due to mechanical inertia of the drive motor, and is held firmly by the elastic force of the limiter spring 35 mentioned above.

When a loading operation is performed from this state and the drive motor 12 is driven to rotate in the normal direction, the rotation shaft 22 rotates in the direction of the arrow A in FIG. Arm 1
Rotate 7. Also, at this time, the cam body 33 is rotated in the direction of the arrow B in FIG.

Then, as shown in FIG. 10, with the pinch roller 8 moved to the second rotation position, the roller 32 of the engaging member 29 attached to the rotation shaft 22 is
is adapted to come into contact with the first regulating surface 46 of the cam body 33. The rotating shaft 22 is stopped by the first restricting surface 46 of the cam body 33 against the biasing force of the limiter mechanism, whereby the pinch roller 8 is held at the second rotating position. be done. After further driving the drive motor 12 a little further, the drive motor 12 moves to a stop operation by, for example, a sensor (not shown) that detects the rotational position of the cam body 33, and the engagement member 29 and the first restriction surface 46 are stopped.
It will stop within the range where the contact state is maintained. At this time, the other limiter spring 3 of the limiter mechanism
5 is compressed and applies an urging force to the rotation shaft 22. The pinch roller 8 is connected to the engaging member 29.
By abutting and engaging the first regulating surface 46, the second rotation can be carried out without being affected by the delay of the drive motor 12 or rotation error due to the inertia force of the drive motor 12. This first position is positioned with high precision at the moving position, and the spring biasing force of the other limiter spring 35 of the limiter mechanism
The magnetic tape 4 is firmly held at the first rotational position, and the magnetic tape 4 is properly guided by the tape guides 7, 7 held at the first rotational position together with the pinch roller 8. In addition, the drive motor 12, once stopped in this state, is turned on in a pinch.
The drive shaft 13 is rotated in the normal direction again by a switch input or the like instructing the rotation. Then, due to this rotation, the abutting position of the engaging member 29 is
It moves from the first regulating surface 46 to the tapered surface 47, and further moves to the second regulating surface 49, as shown in FIG. Then, the rotating shaft 22 rotates slightly in response to the difference in level between the first regulating surface 46 and the second regulating surface 49, and presses the pinch roller 8 against the capstan 11. At this time, the first worm gear 34 of the limiter mechanism is biased by the elastic force of the other compressed limiter spring 35, and is sufficient to withstand the load applied to the rotating shaft 22 for crimping the pinch roller 8. It has a strong drag force,
This rotating shaft 22 is rotated reliably, and the pinch roller 8 is reliably pressed. Furthermore, when the pinch roller 8 is pressed against the capstan 11 in this way,
The above sensor etc. detects this state, and the drive motor 1
At this time, the drive motor 12 is stopped.
Even if it rotates extra due to its inertia,
Within the range in which the engaging member of the rotating shaft 22 contacts the second regulating surface 49 of the cam body 33, the pinch roller 8 is maintained in a proper pressed state.

Further, the drive motor 12 is driven in reverse by a switch input instructing pinch OFF, etc., and the cam body 33 is rotated in the opposite direction, so that the contact position of the engagement member 29 is shifted from the second regulating surface 49. It moves to the first regulating surface 46 via the tapered surface 47 . Here, the sensor or the like detects that the engaging member 29 has moved to the first regulating surface 46, the drive motor 12 is stopped, and the pinch roller 8 returns to the second rotational position. , i.e. the above pinch
It will be kept in the OFF state. Here, since a tapered surface 47 is provided between the first regulating surface 46 and the second regulating surface 49 and the rotatable roller 32 is brought into contact with the first regulating surface 46 and the second regulating surface 49, the engaging member 29 is brought into contact with the rotatable roller 32. It is also easy for the contact position to move from the second restriction surface 49 to the first restriction surface 46,
For this return operation, a large driving force is applied to the cam body 33.
There is no need to rotate.

The main chassis 14 also includes a tape guide drive device according to the present invention, which pulls out the magnetic tape from the tape cassette during loading of the magnetic tape and drives a tape guide 6 that guides the running of the loaded magnetic tape. is provided. This tape guide drive device is driven by the drive motor 12 that constitutes the pinch roller drive device. That is, the drive shaft 13 for rotating the rotation shaft 22 and the cam body 33 is provided with a third worm gear 53 for the tape guide drive device. A worm wheel 54 is adapted to mesh with the third worm gear 53.

As shown in FIG. 13, this tape guide drive device includes a first rotary support shaft 55 rotatably supported by the main chassis 14, and a first rotary support shaft 55 that is also connected to the main chassis 14 in parallel with the first rotary support shaft 55. A second rotation support shaft 56 is rotatably supported. A rotary arm 57 having a tape guide 6 erected on the distal end thereof is attached to the distal end side of the second rotational support shaft 56 with its proximal end fixed. Therefore, the rotating arm 57 is
The rotational support shaft 56 is rotated, and as a result of this rotation, the magnetic tape 4 wound around the tape guide 6 erected on the tip side is pulled out to a predetermined tape running path. A loading operation is performed to remove the tape, or an unloading operation is performed to remove the tape from the tape running path. Further, a driven wheel 58 is integrally attached to a midway portion of the second rotational support shaft 56 .

On the other hand, the first rotation support shaft 55 has the above-mentioned third
A worm wheel 54 and a driving wheel 59 that relatively engages with the driven wheel 58 are integrally attached.

The driven wheel 58 and the driving wheel 59 constitute a so-called Geneva mechanism, as shown in FIG. That is, the driven wheel 58 has a single engagement groove 60 formed in the radial direction, and a pair of arcuate fitting recesses 61, 61 sandwiching the engagement groove 60. The driving wheel 59 has an arc-shaped fitting portion 62 that tightly fits into the fitting recess 61 of the driven wheel 58, and a part of the fitting portion 62 is cut out and formed as a relief portion 63, and from this relief portion 63 An engagement pin 64 that engages with the engagement groove 60 of the driven wheel 58 is attached to the protruding position. In the Geneva mechanism constructed in this way, when the drive wheel rotates and the engagement pin 64 and the engagement groove 60 engage, the first
As shown in FIG. 5, the driven vehicle 58 is connected to the driving vehicle 5.
It rotates along with the rotation of 9. When the driven wheel 58 rotates by a predetermined angle, the engagement between the engaging pin 64 and the engaging groove 60 is released, and the driven wheel 58 stops rotating. In this state, the fitting recess 61 of either one of the driven wheels 58 and the fitting part 62 of the driving wheel 59 are in a slidably close fitting state. Therefore, the driven vehicle 58
is regulated in position by the fitting between the fitting recess 61 and the fitting part 62, and is held at a predetermined rotational position without wobbling. Further, the driving wheel 59 is rotatable while holding the driven wheel 58 at a predetermined rotational position. In this tape guide drive device, the driven wheel 58 is connected to the pair of fitting recesses 6
1 and 61, and are held in position, rotating the rotary arm 57 approximately 90 degrees. In addition, the drive shaft 1
3, the maximum drive range required for operating the pinch roller 8 of the drive motor 12 is determined by the gear ratio of the third worm gear 53 and the third worm wheel 54.
It is set to correspond within at least one rotation of.

In the tape guide drive device configured in this way, the drive motor 12 is connected to the pinch roller 8.
When the drive shaft 13 is driven in order to move the drive wheel 59 from the first rotation position to the second rotation position, the engagement pin 64 of the drive wheel 59 moves within this drive range.
, engages with the engagement groove 60 of the driven wheel 58, and rotates the rotating arm 57. Then, with the pinch roller 8 moved to the second rotational position, the fitting portion 62 of the driving wheel 59 and the fitting recess 61 of the driven wheel 58 are placed in a fitting state, and the tape The guide 6 is positioned and held at a predetermined loading position. Then, even when the drive motor 12 is further driven and the pinch roller 6 is pressed against the capstan 8, the driven wheel 58 is placed in a disengaged state and the tape guide 6 is held in position. The state is maintained.

Further, when the drive motor 12 is reversely driven and the pinch roller 8 is returned to the first rotating position, the engagement pin 64 of the drive wheel 59 is moved to the driven wheel 58.
, the rotating arm 57 is reversed, and the tape guide 6 is returned to the state before loading. Even in this state, the fitting portion 62 and the other fitting recess 61 are fitted, and the tape guide 6 is correctly held at a predetermined position regardless of the excessive drive of the drive motor 12.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. For example, it is possible to drive the tape guide 6 by also using a drive motor for driving a device other than the above-mentioned pinch roller drive device, and the driven wheel 58 has a plurality of engagement grooves 60 and three or more fittings. A mating recess 61 is provided, and the tape guide 6
may be driven in multiple stages. In this way, a more flexible loading operation can be realized.

It is also possible to drive a plurality of tape guide drive devices with a single drive motor 12.

<Effects of the Invention> As is clear from the description of the embodiments described above, according to the present invention, the tape guide is held in a predetermined position by the fitting portion of the driving wheel and the fitting recess of the driven wheel. As a result, the tape guide can be firmly held, and the tape guide will not move due to abnormal tension of the magnetic tape and the guiding state of the magnetic tape will not become unstable.

Furthermore, there is no need to provide a coil spring with a large spring constant, and assembly is easy.

Furthermore, it is easy to use the drive motor used in other devices such as a pinch roller drive device, and when the tape guide is held in a predetermined position against the drive of the drive motor, the coil spring Since the load due to tension does not increase, a large load is not applied to the drive motor, and there is no need to make the tape guide drive device extremely strong.

[Brief explanation of the drawing]

1 and 2 are plan views showing a tape running system of a magnetic recording/reproducing device to which the present invention is applied,
Figure 1 shows the state during unloading, and Figure 2 shows the state during unloading.
The figure shows the pinch OFF state during loading.
3 and 4 are partially omitted perspective views showing an embodiment of the present invention, FIG. 3 showing the state at the time of unloading, and FIG. 4 showing the pinch OFF state at the time of loading. . FIG. 5 is a schematic sectional view showing the limiter mechanism provided in the magnetic recording and reproducing apparatus in the above embodiment, FIG. 6 is a schematic sectional view showing one operating state thereof, and FIG. 7 is a schematic sectional view showing other operating states. FIG. FIG. 8 is a plan view showing the cam body provided in the magnetic recording/reproducing apparatus in the above embodiment, and FIG. 9 is a schematic diagram showing the operating state of the pinch roller drive device provided in the magnetic recording/reproducing apparatus in the above embodiment. FIG. 10 is a schematic plan view showing another operating state, FIG. 11 is a schematic plan view showing still another operating state, and FIG. 12 is a schematic plan view showing still another operating state. FIG. FIG. 13 is an exploded perspective view showing the tape guide drive device;
Fig. 14 is a partially omitted plan view showing a state in which the fitting part and the fitting recess are fitted and the tape guide is held in a predetermined position, and Fig. 15 is a partially omitted plan view showing the state in which the fitting groove and the fitting pin are engaged. FIG. 3 is a partially omitted plan view showing a state in which the tape guide is being driven. 6... Tape guide, 12... Drive motor, 5
5... First rotation support shaft, 56... Second rotation support shaft, 57... Rotating arm, 58... Driven wheel, 59
... Drive wheel, 60 ... Engagement groove, 61 ... Fitting recess, 62 ... Fitting portion, 64 ... Engagement pin.

Claims (1)

[Claims for Utility Model Registration] A drive that is provided with an arcuate fitting portion attached to a first rotating support shaft that is rotated by transmitting the driving force of a drive motor, and is provided with an engagement pin. the wheel, and at least one engagement groove that engages with the engagement pin attached to the second rotating support shaft to which the rotating arm with the tape guide attached is attached and rotatably supported; and this engagement groove. and a driven wheel provided with at least a pair of fitting recesses into which the fitting portions are fitted relative to each other, and the driving wheel is rotated by the drive motor to engage the driving wheel. The pin engages with the engagement groove of the driven wheel to rotate the driven wheel, and the fitting portion of the driving wheel is fitted into one fitting recess of the driven wheel to fix the driven wheel. A tape guide for a magnetic recording and reproducing device, wherein the tape guide of a magnetic recording and reproducing device is configured to selectively switch between a state in which the fitting portion of the drive wheel is fitted into the fitting recess of the other driven wheel and a state in which the driven wheel is fixed. Drive device.