JPH06295507A - Guiding mechanism for tape guide - Google Patents

Abstract

PURPOSE:To surely select the moving routes of tape guide members by a selecting means which selectively controls the moving routes from the first moving route to the second moving route by the moving action of a tape guide means to a tape loading direction. CONSTITUTION:An inlet side first boat 16 moves along the front surface of a guide plate 40 and a boss part 35a projecting downward from the rear surface of this guide plate 40 slides and moves while making contact with a branch guide plate 45 when the first tape guide member 24 exists near a branch point 25. The second tape guide member 25 moves as well and a guide projection 26 formed on the rear surface of an inlet side second boat 11 is guided in an arrow M' direction and is slid and moved along a third guiding groove 43 by coming into contact with the left flank of a contact part 4 of the branch guide plate 45 as the loading 30 further rotates in a direction L. The projection engages with an inlet side second boat positioning member 29 and the tape loading action in the tape inlet side ends.

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. During mounting, a plurality of support members that support each tape guide member share a movement path to a branch point in the middle of the movement path, and then move to a predetermined position by moving a separate movement path branched from the branch point. Although the tape mounting is completed, with respect to the guidance of each tape guide member at the branch point, a biasing force is applied to the support member in a predetermined direction and the tape guide member is guided to a movement path in the direction. There is.

[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 is increased, but also a space for accommodating the urging member is required, which hinders downsizing and thinning of the magnetic recording / reproducing apparatus. Further, it is difficult to adjust the urging force, and if the adjustment is not proper, there is a problem that a 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) is displaced from the first position to the second position depending on the movement of the tape mounting direction in the tape mounting direction, and the first movement path of the tape guide means (corresponding to one embodiment code). 41) to the second movement route (corresponding to one embodiment reference numeral 42,
43) is selectively controlled, and depending on the return movement operation of the tape guide means in the tape loading / unloading direction, the second guide position is returned to the first position for displacement. .

[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, the first tape guide member 24 and the second tape guide member 24 that can form a predetermined tape running path by pulling out the magnetic tape 4 from the cassette 3 by the loading operation and winding the magnetic tape 4 around the magnetic head 4 mounted on the rotary head device 2. Tape guide members 22 of the above, and these guide members are guided by the same first guide groove 41 up to a branch point 25 provided in the middle of the moving path, and after the branch point 25, the first guide groove The second guide groove 4 branched from the groove 41
The second tape guide member 2 is formed by the third guide groove 43.
4 and a tape guide guide mechanism configured to guide the second tape guide member 22 to a predetermined loading completion position, respectively.
A fulcrum is provided in the vicinity of the branch point 25, and as the first tape guide member 24 is guided from the first guide groove 41 to the second guide groove 42, the first tape guide member 24 rotates around the fulcrum to provide the second guide. As the groove 42 is closed and the first guide groove 41 and the third guide groove 43 are communicated with each other, as the first tape guide member 24 is guided from the second guide groove 42 to the first guide groove 41. A branch guide plate 45 that can rotate around the fulcrum in a direction opposite to the rotation direction to close the third guide groove 43 is provided near the branch point 25.

When the first tape guide member 24 passes through the vicinity of the branch point 25 from the direction of the first guide groove 41 toward the direction of the second guide groove 42, the branch guide plate 45 is connected to the tape guide member 24. Abutting, the tape guide member 24
From the abutment portion 45b which is given a turning force around the fulcrum from
When passing from the direction of the second guide groove 42 toward the direction of the first guide groove 41, the tape guide member 24 comes into contact with the tape guide member 24 and a rotational force in the direction opposite to the rotation direction is given from the tape guide member 24. It has a contact portion 45a.

The details of this 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 on 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.

The output side guide roller 17 is planted on the output side rib 18. Numerals 19 and 20 are capstans and pinch rollers for driving the magnetic tape 4 by pressing it, and numeral 21 is 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 will be described in more detail with reference to FIG. 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 that drives the loading ring 30. Reference numeral 33 is a second connecting member connected by the loading ring 30 and the drive pin 38, and the second inlet side rib 11 and the rotating pin 37, respectively.
Is a first connecting member that is connected by the loading ring 30 and the drive pin 36 by the entry-side first ridge 16 and the rotating pin 35, respectively.

Reference numeral 40 denotes a main chassis 1 including 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. And a third guide groove 43 (the guide grooves 41 to 43 are all 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. Before the tape mounting is started, the first tape guide member 24 'and the second tape guide member 22' located at the cassette opening 23 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 moving at the same time, and 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. 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 at the branch point 25 as shown by the arrow C. 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, both the first tape guide member 24 and the second tape guide member 22 slide and move along the first guide groove 41.

Then, at the branch point 25, a rotary pin 35 provided on the lower surface of the first tape guide member 24.
The boss portion 35a of the contact portion abuts on the right side surface of the contact portion 45a of the branch guide plate 45 and slides along this side surface, so that the first tape guide member 24 is guided in the direction of the arrow M and the second guide. It slides along the groove 42. Then, it rises along a predetermined path and is positioned at the final position.

FIG. 3 is a side view of the state in which the first tape guide member 24 is in the vicinity of the branch point 25, and in FIG. 3, the first entrance side rib 16 is the guide plate 4.
The boss portion 35a that moves along the upper surface of the guide plate 40 and projects downward from the lower surface of the guide plate 40 slides while contacting (the right side surface of the contact portion 45a of) the branch guide plate 45.

Returning to FIG. 2 again, when the first tape guide member 24 passes through the branch point 25 and moves in the direction of arrow M as described above, the boss portion 35a of the boss portion 35a contacts 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, which is erected at the tip of the second entrance-side ridge 11, engages with the ridge-positioning member 29, and the tape loading operation on the tape entrance side is completed.

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 25 is reached.
Pass through. 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 moves in the second guide groove 42 in the direction opposite to the arrow M direction. At this time, the boss portion 35a abuts on the abutting portion 45a of the branch guide plate 45, and the branch guide plate 45 rotates in the direction of the arrow N'about the rotation pin 46 to branch at the position shown in FIG. Information board 45
Stops. After that, the first and second tape guide members 24 and 22 move along the first guide groove 41, reach the inside of the cassette opening 23 of FIG. 1 described above, and the tape mounting / dismounting ends.

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. Therefore, the configuration is simple and the adjustment at the branch point 25 can be easily performed, and the first and second tape guide members 24 and 22 can be reliably regulated in a predetermined direction at the branch point 25 during the tape mounting. Therefore, there is an effect that each tape guide member is surely guided along a predetermined path without making a mistake in the path and the tape mounting is performed.

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 movement path of the tape guides of the tape guide guide mechanism can be easily designed, and
Since the degree of freedom of the shape of the member itself that supports the tape guides is large and the tape guides can be made small in size, the tape guide is used particularly in the structure in which the magnetic tape is mounted on the rotary head device up to the side opposite to the cassette. There is an advantage that the plane area of the 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 above 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.

[0028]

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 ... Rotary 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 (3)

[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 moves from a first position to a second position depending on a moving operation of the tape guide means in a tape mounting direction. When the tape guide means is displaced to the position, the tape guide means is selectively controlled from entering the first movement path to the second movement path, and the tape guide means returns to the tape mounting / dismounting direction by a return movement operation. A tape guide guide mechanism, which is configured to return-displace from the second position to the first position. 2. The tape guide guide mechanism according to claim 1, wherein the selecting means is configured to be in direct contact with the tape guide means to be displaced. 3. The tape guide guide mechanism according to claim 1 or 2, wherein the selecting means has a structure of rotating around a fulcrum.