JPH0561833U - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the height of the tape guide 2 is adjusted, the inclination direction of the tape guide 2 does not change, and therefore the tape running path can be easily adjusted, and the tape for each individual device can be adjusted. Provided is a magnetic recording / reproducing apparatus capable of obtaining a stable tape traveling system with little variation in traveling path. [Structure] A shaft 1 provided on a main body 5, a tape guide 2 rotatably supported by the shaft 1, a guide surface 2a provided on the tape guide 2, and a tape guide 2 that abuts on the tape guide 2 A magnetic recording / reproducing apparatus having a position regulating means 3 for regulating the axial position of the. A protrusion 2c is provided at an abutting portion between the tape guide 2 and the position regulating means 3, and a preloading means for preloading the tape guide 2 in the axial direction so that the tape guide 2 and the position regulating means 3 contact each other via the protrusion 2c. 4 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic recording / reproducing apparatus such as a tape recorder, and more particularly to a tape guide thereof.

[0002]

[Prior Art]

 In a magnetic recording / reproducing apparatus such as a tape recorder, a tape guide is used for running a tape in a predetermined path in a tape running system. In particular, in the running system before and after the magnetic head, a highly accurate tape guide is required in order to properly slide the tape on the magnetic head. Therefore, first, the arrangement of the tape guide in the conventional magnetic recording / reproducing apparatus will be schematically described with reference to FIG.

The magnetic recording / reproducing apparatus shown in FIG. 10 is of a reverse type, and has capstan shafts 28, 38 and pinch roller arms 22, 32 on both sides in the left-right direction in the figure of the main body 25. The pinch roller arms 22 and 32 are rotatably supported around shafts 21 and 31 fixedly implanted in the main body 25, and hold the pinch rollers 26 and 36 rotatably. One of the pinch roller arms 32 has a tape guide portion 32a extending like an arm. The pinch roller arms 22 and 32 are rotationally biased by springs 24 and 34 in directions to press the pinch rollers 26 and 36 against the capstan shafts 28 and 38, respectively.

A head plate 40 is mounted on the main body 25 so as to be vertically movable in FIG. A magnetic head 41 is attached to the head plate 40, and tape guides 27 and 37 are attached to both sides thereof. Therefore, the magnetic head and the tape guides 27 and 37 can move back and forth integrally with the head plate 40. The magnetic head is rotatable in a plane perpendicular to the moving surface of the head plate 40, so that recording / reproduction can be performed not only when the tape is running in the forward direction but also when it is running in the reverse direction. Is becoming The pinch roller arms 22 and 32 are engaged with the head plate 40, and when the head plate 40 moves forward, that is, when the head plate 40 moves upward in FIG. 10, the pinch rollers 26 and 36 move to the capstan shafts 28 and 38. It is rotated in the direction in which it is pressed. At this time, the tape guide portion 32a integrated with the pinch roller arm 32 guides the tape, and the tape guides 27 and 37 guide the tape so that the tape is properly slid on the tape sliding surface of the magnetic head 41. It is designed to let you.

A tape guide portion similar to the tape guide portion 32 a formed integrally with the pinch roller arm 32 may be provided on the pinch roller arm 22 as well.

As described above, the tape guide is used to properly run the tape along the predetermined path. Therefore, the height position of the tape guide, that is, the position in the tape width direction needs to be adjusted with high precision, and for this purpose, a tape guide height adjusting mechanism is provided. FIG. 11 shows an example thereof, and here, an adjusting mechanism of the pinch roller arm 32 which also serves as a tape guide is shown. In this adjusting mechanism, a spring (not shown) and a pinch roller arm 32 are inserted into the shaft 31, and then an adjusting nut 43 is screwed into the threaded portion at the upper end of the shaft 31, and the upper surface of the pinch roller arm 32 is moved by the urging force of the spring. The lower surface of the adjustment nut 43 is brought into contact with the adjustment nut 43. When the adjusting nut 43 is rotated, the adjusting nut 43 moves up and down by a small amount along the screw of the shaft 31, and accordingly, the height position of the pinch roller arm 32 can be adjusted.

[0007]

[Problems to be solved by the device]

 The adjusting mechanism as shown in FIG. 11 has a drawback that the tilting direction of the pinch roller arm 32 changes depending on the rotational position of the adjusting nut 43. This will be explained more concretely. The contact surface of the adjusting nut 43 with the pinch roller arm 32 is not necessarily a smooth surface but an uneven surface as shown in FIG. 11, and the convex portion 43a thereof always contacts the pinch roller arm 32. On the other hand, there is a gap between the mounting hole of the pinch roller arm 32 and the shaft 31, and the pinch roller arm 32 is inclined by this gap. The direction of this inclination is determined by the contact position of the convex portion 43a of the adjustment nut 43 with the pinch roller arm 32. Therefore, when the adjusting nut 43 is rotated to adjust the height of the pinch roller arm 32, the contact position of the convex portion 43a with respect to the pinch roller arm 32 moves around the shaft 31, and the pinch roller arm 32 moves. The tilt direction changes. That is, the angle of the pinch roller arm 32 with respect to the shaft 31 swings. Such a problem of the angular deviation occurs not only in the pinch roller arm 32 but also in the tape guides 27 and 37 shown in FIG. 10 as long as the adjusting mechanism is the same mechanism.

FIG. 12 shows a change in the deflection angle of the tape guide when the adjustment nut is rotated in the conventional adjustment mechanism described above. The deflection angle greatly changes and the adjustment nut rotates once. It can be seen that the deflection angle periodically changes during the operation. On the other hand, the tape in sliding contact with the tape guide is biased to one side in the tape width direction according to the tape guide inclination direction. The direction of the bias changes. Also, the height of the guide surface of the tape guide itself changes as the tilt direction of the tape guide changes. Therefore, when the adjusting nut is rotated to adjust the height of the tape guide, the height of the guide surface of the tape guide is not stable, and there is a problem that the adjusting work is troublesome. In addition, even if the head height, head tilt, and tape guide height on the supply side are adjusted to be constant in each magnetic recording / reproducing device, the tape will run completely differently for each magnetic recording / reproducing device. There was a problem.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and prevents the inclination direction of the tape guide from changing even when the height of the tape guide is adjusted. Therefore, it is an object of the present invention to provide a magnetic recording / reproducing apparatus in which the tape traveling path can be easily adjusted, variation in the tape traveling path between individual devices is small, and a stable tape traveling system can be obtained.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a shaft provided on a main body, a tape guide supported on the shaft, a guide surface provided on the tape guide, and a tape guide which is in contact with the tape guide. It has a position regulating means for regulating the position in the axial direction, and a projection is interposed at the abutting portion between the tape guide and the position regulating means, and the tape guide and the position regulating means contact through the projection. It is characterized in that a preload means for axially preloading the tape guide is provided so as to be in contact with the tape guide.

[0011]

[Action]

 The tape guide and the position regulating means are in contact with each other via the protrusion by the preloading means. The axial position of the tape guide can be adjusted by adjusting the restriction position by the position restriction means. At this time, the contact position between the tape guide and the position regulating means does not change, and the direction of inclination of the tape guide does not change.

[0012]

【Example】

 An embodiment of a magnetic recording / reproducing apparatus according to the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 5 indicates a main body of a magnetic recording / reproducing apparatus including a chassis or the like. The shaft 1 is fixedly implanted in the main body 5. A preloading step 4, which is a coil spring, a washer 18 and a tape guide 2, are inserted into the shaft 1 in this order, and a position regulating means 3 which is an adjusting nut is screwed into the threaded portion at the upper end of the shaft 1 from above. Has been done. The tape guide 2 integrally has a guide arm 2h. An arcuate guide surface 2a is formed at the tip of the guide arm 2h. The tape guide 2 also serves as a pinch roller arm, and rotatably supports the pinch roller 6 by means of a shaft 11. The tape guide 2 is rotatable around the axis 1 and movable in the axis 1 direction. The tape guide 2 is biased in a direction in which it is pushed up by the preload means 4, but its position is regulated by the contact surface 2b at the upper end of the tape guide 2 contacting the position regulating means 3. However, an upward projection 2c is integrally formed on the abutting surface 2b, and the tape guide 2 and the position regulating means 3 come into contact with each other via the projection 2c.

On the side surface of the tape guide 2, a spring receiver 2e and a spring restricting portion 2f projecting from one end thereof are integrally provided, and a rising portion at one end of the spring 4 contacts the spring receiver 2e, The position is regulated by the regulation portion 2f. A spring receiver 5a is provided in the main body 5 of the magnetic recording / reproducing apparatus, and the other end of the spring 4 is in contact with the spring receiver 5a. The spring 4 is twisted and biased around the shaft 1, and both ends thereof are respectively hooked on spring receivers 2e and 5a, whereby the tape guide 2 rotates in a direction to press the pinch roller 6 against a capstan shaft (not shown). Being energized. Rotation of the tape guide 2 by this urging force is regulated by an appropriate regulation member. In the recording / reproducing mode, the tape guide 2 rotates in the urging direction as the head plate moves, and the pinch roller 6 is pressed against the capstan shaft. As shown in FIG. 1, the spring receiver 2e is provided on an extension of a line that bisects the pinch roller 6 in the vertical direction.

According to the embodiment described above, the tape guide 2 is preloaded by the preload means 4, and the tape guide 2 and the position regulating means 3 are inserted through the protrusion 2c integrally formed on the contact surface 2b of the tape guide 2. And abut each other, the tape guide is tilted in a certain direction by a gap existing between the shaft 1 and the shaft hole of the tape guide 2. As a result, as shown in FIG. 1, the guide surface 2a also tilts in a certain direction, and the tape 10 guided by slidingly contacting the guide surface 2a is biased to either the upper side or the lower side of the guide surface 2a. In the example of FIG. 1, the tape 10 is biased to the lower side of the guide surface 2a. In this way, since the deviation of the tape 10 on the guide surface 2a is constant, the tape 10 is guided in a stable state at a predetermined position.

When the position regulating means 3 is rotated to adjust the height position of the tape guide 2, the position regulating means 3 moves up and down by a small amount along the screw of the shaft 1 and comes into contact with the position regulating means 3. The tape guide 2 that is moving also moves up and down by a small amount. Since the tape guide 2 is in contact with the position regulating means 3 at one point by the protrusion 2c, and the protrusion 2c does not move around the axis 1, the tape guide 2 and the position regulating means 3 are in contact with each other. The contact position is a substantially constant position when viewed from the position of the axis 1, the inclination direction of the tape guide 2 is always constant, and the deflection angle of the tape guide 2 accompanying the rotation of the position regulating means 3 is small. .. FIG. 4 shows the result of actual measurement of the deflection angle of the tape guide 2 with respect to the rotation angle of the adjusting nut as the position regulating means 3 in the above embodiment. As is clear from FIG. 4, the deflection angle of the tape guide 2 is small and has no periodicity.

As described above, according to the above-described embodiment, the tape guide 2 is tilted in a fixed direction, and the deflection angle of the tape guide 2 is small, so that the tape traveling path can be easily adjusted. It is possible to obtain a stable tape running system with little variation in the tape running path for each device. Further, since the preloading means 4 for urging the tape guide 2 which also functions as the pinch roller arm is urged against the spring bearing 2e on the extension line of the line that bisects the pinch roller 6 in the vertical direction, The tape guide 2 is not twisted by the rotational biasing force of the means 4, and from this point as well, the variation in the deflection angle of the tape guide 2 can be reduced.

Next, various modifications of the magnetic recording / reproducing apparatus according to the present invention will be described. In the embodiment shown in FIG. 5, a washer 12 is interposed between the abutting surface 2b and the position regulating means 3 instead of directly providing a protrusion on the abutting surface 2b of the tape guide 2, and the washer 12 An upward protrusion 12a is formed on the lower surface of the position regulating means 3, and the protrusion 12a is brought into contact with the lower surface of the position regulating means 3. The washer 12 is provided with a downward pin 12b, and the pin 12b is engaged with the hole of the tape guide 2 to prevent the washer 12 from rotating. Also in this embodiment, the same operational effects as those of the above-mentioned embodiment can be obtained.

In the embodiment shown in FIG. 6, a washer 14 is interposed between the abutment surface 2b of the tape guide 2 and the position regulating means 3, and a downward projection 14a is formed on the washer 14 and the projection 14a is formed. Is brought into contact with the contact surface 2b. The washer 14 is provided with a downward pin 14b, and the pin 14b is engaged with the hole of the tape guide 2 to prevent the washer 14 from rotating.

In the embodiment shown in FIG. 7, the shaft 15 itself is used as a position regulating means, and the other tape guides 2, preloading means 4 and the like are constructed in the same manner as the embodiment of FIG. The shaft 15 has a head portion 15a and is screwed into a screw hole of the main body 5. The shaft 15 may be a tapping screw that can be screwed into the hole of the main body 5 while tapping. The protrusion 2 c of the tape guide 2 is in contact with the lower surface of the head portion 15 a of the shaft 15 by the preload of the preload means 4. According to this embodiment, it is possible to adjust the height position of the tape guide 2 by rotating the shaft 15 and moving it up and down, and it is possible to achieve the same effect as the above-mentioned embodiment.

In each of the above-described embodiments, the tape guide also serves as the pinch roller arm, and the tape guide is provided so as to be rotatable about the shaft. However, the tape guide in the present invention does not include the pinch roller arm. It does not need to be combined, and it does not need to be rotatable about the axis. In the embodiment shown in FIGS. 8 and 9, a key 18 is fitted between the tape guide 2 and the shaft 1, and the key 18 stops the rotation of the tape guide 2. However, the tape guide 2 is movable in the axial 1 direction, is preloaded by the preloading means 4, and its projection 2c comes into contact with the lower surface of the position regulating means 3, so that the position of the tape guide 2 in the axial 1 direction is changed. Has been adjusted. Further, in this embodiment, the tape guide 2 is constructed as a single tape guide and does not serve as a pinch roller arm.

Although the projections provided in the contact portion between the position regulating means and the tape guide are provided on the left side of the shaft in the illustrated embodiments, they may be provided on the right side of the shaft. It may be on the front side or the opposite side of the shaft. In short, the position where the protrusion is provided is determined to be a predetermined position, and the position of the protrusion does not move as the position-regulating member rotates, so that it may be anywhere.

The magnetic recording / reproducing apparatus according to the present invention is applicable to not only general analog tape recorders, but also video tape recorders, digital audio tape recorders (DAT), and the like.

[0023]

[Effect of the device]

 According to the present invention, a preload means for preloading the tape guide axially so that the tape guide and the position restricting means come into contact with each other via the projection, at the contact portion between the tape guide and the position restricting means. Since the tape guide has a fixed inclination direction, the tape guide swing angle is small, which makes it easy to adjust the tape travel path and minimizes variations in tape travel path between individual devices. It is possible to obtain a tape drive system.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention.

FIG. 2 is a plan view of an essential part of the embodiment.

FIG. 3 is a plan view of the above embodiment.

FIG. 4 is a diagram showing a change in deflection angle of the tape guide in the above-mentioned embodiment.

FIG. 5 is a partial cross-sectional side view showing a main part of another embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 6 is a partial cross-sectional side view showing a main part of still another embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 7 is a sectional side view showing still another embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 8 is a partial cross-sectional side view showing still another embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 9 is a plan view of the same.

FIG. 10 is a plan view showing a general example of a magnetic recording / reproducing apparatus including a tape running system.

FIG. 11 is a sectional side view showing an example of a tape guide of a conventional magnetic recording / reproducing apparatus.

FIG. 12 is a diagram showing a change in deflection angle of the conventional tape guide.

[Explanation of symbols]

 1 axis 2 tape guide 3 position regulating means 4 preloading means 5 main body 2a guide surface 2c projection 15 axis 12a projection 14a projection

Claims (1)

[Scope of utility model registration request] 1. A shaft provided on a main body, a tape guide supported by the shaft, a guide surface provided on the tape guide, and an axial position of the tape guide by contacting the tape guide. In a magnetic recording / reproducing apparatus provided with a position regulating means for regulating, a protrusion is interposed at an abutting portion between the tape guide and the position regulating means, and the tape guide and the position regulating means are interposed via the protrusion. A magnetic recording / reproducing apparatus provided with a pre-compression means for pre-compressing the tape guide in the axial direction so as to come into contact with.