JPH0795384B2 - Tape guide guide mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure aiming at ensuring a selection operation of a moving path of a tape guide member of a tape guide guide mechanism in a magnetic recording / reproducing apparatus and simplifying the structure.

[0002]

2. Description of the Related Art A plurality of support members for supporting a tape guide member for guiding a magnetic tape or a pinch roller are operated to pull out the magnetic tape from the cassette,
A conventional magnetic recording / reproducing apparatus having a tape mounting device capable of winding this magnetic tape around a rotary head device at a predetermined angle is disclosed in Japanese Patent Laid-Open No. 20957/1982. A plurality of support members that support each tape guide member during mounting share a movement path to a branch point in the middle of the movement path, and then move a separate movement path branched from the branch point to reach a predetermined position. Although the tape mounting is completed, with respect to the guide of each tape guide member at the branch point, it is configured to apply a biasing force to the support member in a predetermined direction and guide it to a movement path in that direction. .

[0003]

Although the tape guide guide mechanism constructed as described above is an effective means for guiding the tape guide member, the tape guide guide mechanism is used to guide the support member to a predetermined moving path. A biasing member such as a spring is required to apply a biasing force. Therefore, not only the number of parts increases but also a space for accommodating the urging member is required, which hinders downsizing and thinning of the magnetic recording / reproducing apparatus. Further, there is a problem to be solved that it is difficult to adjust the urging force, and if the adjustment is not proper, the sliding load may increase or the tape guide member may make a wrong movement path. SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape guide guide mechanism that solves the above-mentioned problems of the prior art and that ensures the operation of selecting the movement path of the tape guide member and has a simple structure.

[0004]

In order to achieve the above object, the present invention has the following configuration. That is, in the tape guide guide mechanism for selecting the moving path of the tape guide means by the selecting means, the selecting means (corresponding to one embodiment reference numeral 45) is the tape guide means (corresponding to one embodiment reference numeral 24, 16, 14, 15, 35, 27, 22, 11,
9, 10, 37, 26, 28) by the moving operation
From the position to the second position and is held in the first or second position.

[0005]

EXAMPLES The present invention will be described below with reference to examples. 1 is a schematic plan view showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a main portion of a tape guide guide mechanism in FIG. 1, and FIG. View,
FIG. 4 is a plan view of the main parts of the tape guide mechanism in the tape loading state after the entry-side first rung has passed the branch point.

The outline of this magnetic recording / reproducing apparatus is as follows. That is, a rotary head device 2 having a magnetic head mounted thereon, a cassette 3 containing a magnetic tape 4 therein, and a magnetic tape 4 is pulled out from the cassette 3 by a loading operation and wound around the rotary head device 2 so that a predetermined tape running path is formed. A first tape guide member 24 and a second tape guide member 22 capable of forming the same, and the same first guide groove 41 up to a branch point 25 where these guide members are provided in the middle of the movement path. Guided by the branch point 2
From 5 onward, the first tape guide member 24 and the second tape guide member 22 are guided by the second guide groove 42 and the third guide groove 43 branched from the first guide groove 41, respectively, and the predetermined loading is performed. A magnetic recording / reproducing apparatus having a tape guide guide mechanism configured to guide to a completion position, wherein a fulcrum is provided in the vicinity of the branch point 25, and the first tape guide member 24 extends from the first guide groove 41 to the first guide groove 41. 2 guide groove 42
The second tape guide member 24 is rotated about the fulcrum to close the second guide groove 42 and communicates the first guide groove 41 and the third guide groove 43 with each other.
As the second guide groove 42 guides the first guide groove 41 to the first guide groove 41, the branch guide can be rotated around the fulcrum in a direction opposite to the rotation direction to close the third guide groove 43. The plate 45 is provided near the branch point 25.

In the branch guide plate 45, the first tape guide member 24 is located near the branch point 25 in the first guide groove 41.
Direction, the tape guide member 24 comes into contact with the tape guide member 2 when passing in the direction of the second guide groove 42.
A contact portion 45 to which a turning force around the fulcrum is given from 4
b, when passing from the direction of the second guide groove 42 toward the direction of the first guide groove 41, it abuts against the tape guide member 24 and applies rotational force from the tape guide member 24 in the direction opposite to the rotation direction. The contact portion 45a is provided.

The details of the magnetic recording / reproducing apparatus will be described below. Reference numeral 1 is a main chassis of the magnetic recording / reproducing apparatus, 2 is a rotary head device mounted with a magnetic head and rotatably attached to the main chassis 1, and 3 is a cassette also attached to the main chassis 1.
A supply-side reel 5 and a winding-side reel 6 around which the magnetic tape 4 is wound are arranged in parallel inside. 7 is a magnetic tape 4
A tension pin 8 for detecting the tension when the vehicle runs, and a fixed guide 8 erected on the main chassis 1.

Reference numeral 9 is a second entrance side inclined guide, and 10 is a second entrance side inclination guide.
Guide rollers, 37 is a rotation pin having a boss 37a,
Reference numeral 26 is a guide protrusion, and the entrance-side second inclined guide 9 and the entrance-side second guide roller 10 have a positioning pin 28 at the tip.
Are planted in a predetermined positional relationship on the upper surface of the entrance-side second rib 11 on which the rotary pin 37 and the guide projection 26 are fixed to the bottom surface of the entrance-side second rib 11 to form the second tape. The guide member 22 is configured.

Reference numeral 12 is an erasing head for erasing over the entire width of the magnetic tape 4, and 13 is an impedance roller for absorbing longitudinal vibration of the magnetic tape 4. Reference numeral 14 is an entrance-side first inclined guide, 15 is an entrance-side first guide roller, 35 is a rotary pin having a boss portion 35a, 27 is a guide protrusion, and the entrance-side first inclined guide 14 and the entrance-side first guide roller are shown. 15
Are planted on the upper surface of the entrance-side first rib 16 in a predetermined positional relationship, and the rotary pin 35 and the guide protrusion 27 are provided on the entrance-side first rib 1.
It is fixed to the lower surface of 6 to form the first tape guide member 24.

Reference numeral 17 denotes a delivery side guide roller, and this delivery side guide roller 17 is planted on a delivery side rib 18. 1
Reference numerals 9 and 20 denote capstans and pinch rollers for driving the magnetic tape 4 by pressing it, and reference numeral 21 denotes a width regulation guide for regulating the position of the magnetic tape 4 entering the cassette 3.
In FIG. 1, each tape guide before starting the tape mounting is shown by a broken line, a reference numeral is attached with a dash, and after tape mounting is shown by a solid line.

Next, the tape guide guide mechanism is shown in FIG.
Will be used to explain in more detail. Reference numeral 30 denotes a loading ring for driving the first tape guide member 24 and the second tape guide member 22, and 31 denotes a plurality of rotatably supported main chassis 1 which rotatably supports the loading ring 30. The ring holder 32 is a drive gear rotatably supported by the main chassis 1 for driving the loading ring 30. 33 is a loading ring 30, a drive pin 38, and an entry side second rib 1
The first connecting member 34 is connected to the loading ring 30 and the driving pin 36, and the first connecting member 16 and the rotating pin 35.

A main chassis 1 is composed of a main guide 40a, a branch guide 40b and a sub guide 40c.
A first guide groove 41 for guiding the first tape guide member 24 and the second tape guide member 22 to the branch point 25,
A second guide groove 42 that guides the first tape guide member 24 to a predetermined position extending from the first guide groove 41, and a second tape guide member 22 from the branch point 25 to the ridge positioning member 29. The third guide groove 43 is provided (all of the guide grooves 41 to 43 are shown by a one-dot chain line).

The contact portions 45a, 45b, the first groove portion 45c,
The branch guide plate 45 having the second groove portion 45d is provided so as to be rotatable about a rotation pin 46 that is erected near the branch point 25 as a fulcrum. 47 is the first groove portion 4 of the branch guide plate 45.
5c or the second groove 45d to engage with the branch guide plate 4
5 is a position regulating member having a protrusion 47a capable of regulating the stop position of No. 5, and this position regulating member 47 is installed on the sub guide 40c.

An outline of the loading operation of the magnetic recording / reproducing apparatus having the above structure will be described with reference to FIG. The first tape guide member 24 ′ and the second tape guide member 22 ′, which were located in the cassette opening 23 before the tape mounting was started, are indicated by chain double-dashed lines so that the magnetic tape 4 can be pulled out at the start of the loading operation. Move in the direction shown. At this time, the first tape guide member 24 and the second tape guide member 22 start to move at the same time and move on the same path (that is,
It moves along the first guide groove 41) in FIG. 2 and moves to the branch point 25 without changing its height position as indicated by arrow A.

At the branch point 25, the first tape guide member 24 moves along a path approaching the rotary head device 2 as shown by an arrow B, and gradually increases its height to reach a predetermined position to reach a predetermined position on the magnetic tape. 4 is mounted on the rotary head device 2. At this time, the impedance roller 13 located at the position 13 'during the mounting of the tape moves as indicated by an arrow G. Simultaneously with the operation of the first tape guide member 24, the second tape guide member 22 does not change its height along the path away from the rotary head device 2 as shown by the arrow C at the branch point 25. The tape moves to reach a predetermined position at the end of mounting the tape, and forms a traveling path on the tape entry side of the rotary head device 2.

On the other hand, the delivery side rib 18 moves in parallel with the movement of the first and second tape guide members 24 and 22 as shown by the arrow D, and the pinch roller 20 and the width regulation guide 21 respectively show the arrows E and E. While moving like F, the tape running path on the tape output side of the rotary head device 2 is formed, and the tape mounting is completed. Here, the tape mounting operation on the tape entry side will be described in more detail with reference to FIGS.

In FIG. 2, the drive gear 32 rotates in the direction of the arrow by a drive source (not shown), and the loading ring 30 turns in the direction of the arrow L. The first tape guide member 24 is driven by the loading ring 30 via the first connecting member 34, and the second tape guide member 22 is driven by the loading ring 30 via the second connecting member 33. At this time, the first tape guide member 24 and the second tape guide member 2
Both 2 slide and move along the first guide groove 41.

Then, at the branch point 25, the boss portion 35a of the rotary pin 35 provided on the lower surface of the first tape guide member 24 comes into contact with the right side surface of the contact portion 45a of the branch guide plate 45, and the side surface thereof. The first tape guide member 24 is guided in the direction of the arrow M and slides along the second guide groove 42. Then, it rises along a predetermined path and is positioned at the final position. The first
FIG. 3 is a side view of the state where the tape guide member 24 of FIG. 2 is near the branch point 25. In FIG. 3, the first entrance side ridge 16 moves along the upper surface of the guide plate 40. However, the boss portion 35a protruding downward from the lower surface of the guide plate 40 slides while abutting on (the right side surface of the contact portion 45a of) the branch guide plate 45.

Returning to FIG. 2 again, as described above, when the first tape guide member 24 passes through the branch point 25 and moves in the direction of the arrow M, its boss portion 35a has a contact portion 45b of the branch guide plate 45. The branch guide plate 45 is rotated in the direction of arrow N about the rotation pin 46 as a central axis by abutting against. As a result, the protrusion 47a of the position regulating member 47, which has been engaged with the second groove portion 45d of the branch guide plate 45, moves in the direction of arrow P to unlock. When the first tape guide member 24 separates from the contact portion 45b of the branch guide plate 45, the protrusion 47a of the position regulating member 47 engages with the first groove 45c, and the branch guide plate 45 is fixed at that position. . The state at this time is shown in FIG.

According to FIG. 4, the second tape guide member 2
2 will be described. As described above, the first tape guide member 24 passes through the branch point 25 and the branch guide plate 4
5 when it is separated from the contact portion 45b of the branch guide plate 45
The abutting portion 45a moves to the main guide 40a side, that is, the rotary head device 2 side to close the second guide groove 42.
As the loading ring 30 further rotates in the L direction, the second tape guide member 22 also moves, and the guide protrusion 26 provided on the lower surface of the second entrance side rib 11 contacts the contact portion 45a of the branch guide plate 45. It comes into contact with the left side surface of the and is guided in the direction of the arrow M ′, and slides along the third guide groove 43.
Then, the positioning pin 28 that is erected at the tip of the second entry-side ridge 11 engages with the ridge positioning member 29, and the tape loading operation on the tape entry side ends.

Although the tape loading operation has been described above, when the tape loading is released, the operation is the reverse of the tape loading operation. That is, in FIG. 4, the loading ring 30 rotates in the direction opposite to the arrow L, the second tape guide member 22 moves in the direction opposite to the arrow M ′, and the branch point 2 is reached.
Pass 5. At this time, since the branch guide plate 45 is open to the side of the third guide groove 43 at the branch point 25, the second tape guide member 22 returns to the first guide groove 41 through a path that has no contact. .

Next, the first tape guide member 24 is moved to the second
The guide groove 42 is moved in the direction opposite to the arrow M direction. At this time, the boss portion 35a comes into contact with the contact portion 45a of the branch guide plate 45, and the branch guide plate 45 rotates about the rotation pin 46 in the direction of the arrow N ', and at the position shown in FIG. The branch guide plate 45 stops. After that, the first and second tape guide members 24, 22 move along the first guide groove 41, reach the inside 23 of the cassette opening portion of FIG. 1 described above, and the tape unloading is completed.

According to the embodiment described above, unlike the conventional tape guide guide mechanism, it is not necessary to use a biasing member made of an elastic material such as a spring for biasing the tape guides in a predetermined guiding direction. , Simple configuration and branch point 2
5 can be easily adjusted, and the first and second tape guide members 24 and 22 can be surely regulated in a predetermined direction at the branch point 25 in the middle of mounting the tape. There is an effect that the tape mounting is surely performed along the predetermined route without mistake.

At the branch point 25, the branch angle from the first guide groove 41, which is the main passage, to the sub passage that branches is freely changed by changing the shape of the branch guide plate 45, which is a movable member for branch guide. Since it can be changed, the position of the branch point 25 in the tape mounting path can be freely selected at the time of design. Therefore, the moving path of the tape guides of the tape guide guide mechanism can be easily designed, and the degree of freedom of the shape of the member itself that supports the tape guides is large and the size can be made small. On the other hand, in the structure in which the magnetic tape is mounted up to the side opposite to the cassette, there is an advantage that the plane area of the tape guide mechanism can be reduced.

Further, in this embodiment, the branch guide plate 4
5 is provided on the lower side of the guide plate 40.
Even if it is provided on the upper side of 0, the same effect can be obtained. In this way, the space below the guide plate 40 can be further reduced, and the device can be made thinner. Furthermore, in this embodiment, each tape guide member 2 is provided only on the tape entry side of the rotary head device 2.
Although a mounting system having a configuration in which 4, 22 are raised has been described as an example, another mounting system such that each tape guide member moves in parallel on the tape input side and the tape output side of the rotary head device 2. It is obvious that the present invention can be applied to the above device.

[0027]

As described above, according to the present invention, it is possible to provide a tape guide guide mechanism which ensures the operation of selecting the moving path of the tape guide member and has a simple structure.

[Brief description of drawings]

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

FIG. 2 is a plan view of a main part of the tape guide guide mechanism in FIG.

FIG. 3 is a view from the III direction in FIG.

FIG. 4 is a plan view of a main part of a tape guide guide mechanism, showing an intermediate state of tape mounting after the first entrance-side ridge has passed through a branch point.

[Explanation of symbols]

 2 ... Rotating head device, 3 ... Cassette, 4 ... Magnetic tape, 24 ... First tape guide member, 22 ... Second tape guide member, 25 ... Branch point, 41 ... First guide groove, 42 ... Second Guide groove, 43 ... Third guide groove, 45 ... Branch guide plate, 45a, 45b ... Contact portion.

Claims (1)

[Claims] 1. A tape guide guide mechanism for selecting a moving path of a tape guide means by a selecting means, wherein the selecting means is configured to move by a moving operation of the tape guide means.
The tape guide guide mechanism is configured to be displaced from the position to the second position and held at the first or second position.