JP3057184U - Magnetic tape unit - Google Patents

Abstract

(57) [Problem] To provide a loading mechanism with a small number of parts and a simple structure. SOLUTION: There is provided a link mechanism 22 including a pair of drive side links 28 reciprocated by a drive means 21 and a pair of driven side links 29 connected to each of moving tables 4a, 4b. The moving tables 4 a and 4 b are connected to the respective slots 3 by the driving means 21 via the link mechanism 22.
In the magnetic tape device in which the magnetic tape is pulled out from the tape cassette by each movable guide post 5a and 5b and wound around the head cylinder by advancing a along a and 3b, a pair of driven side links 29 is provided.
Is composed of a linear spring 29A. The linear spring 29A also serves as urging means for urging each of the moving tables 4a and 4b in the loading direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a magnetic tape device for recording, reproducing, or erasing data on a magnetic tape, and particularly to a simplified structure of a loading mechanism.

[0002]

[Prior art]

 An example of this type of magnetic tape device will be described with reference to FIG. 6. A pair of left and right long holes 3a and 3b are formed in a chassis 1 with a head cylinder 2 interposed therebetween, and are formed along the respective long holes 3a and 3b. The movable guide posts 5a, 5b are erected on a pair of movable tables 4a, 4b which can move in the front and rear directions a, b. Reference numeral 6 denotes a full width erasing head, 7 denotes a voice erasing head, 8 denotes a voice / control head, 9 denotes a fixed tape guide post, 10 denotes a capstan, and 11 denotes a pinch roller that presses against the capstan 10 via a magnetic tape t. Reference numeral 12 denotes a tension post (see the phantom line in FIG. 6) for applying tension to the magnetic tape t during loading, and reference numeral 13 denotes a rotating cam for switching a mode switching lever (not shown) and the like. A worm gear 15 is meshed with a gear portion 14 formed on the outer peripheral surface, and the worm gear 15 is linked to a cam motor 17 via a pulley mechanism 16. Reference numeral 18 denotes a positioning pin protruding from the chassis 1 so as to face the front end of each of the slots 3a and 3b, and engages an engagement frame 19 protruding from the front of each of the moving tables 4a and 4b. Thus (see the phantom line in FIG. 6), the movable tables 4a and 4b are positioned at the loading position.

Conventionally, as a loading mechanism for moving the movable tables 4a and 4b back and forth, there is a mechanism described in Japanese Patent Application Laid-Open No. Hei 5-17624, which uses a power transmission mechanism (driving means) as shown in FIG. ) 21 and a link mechanism 22.

The power transmission mechanism 21 includes a pair of sector gears 23 and 24 rotatably connected to the chassis 1 via pivot shafts 23 a and 24 b and meshing with each other, and one of the sector gears. 23 and a rack 26a formed at one end are engaged with the pinion 25, and a cam pin 26b protruding at the other end is fitted into the cam groove 13a of the rotary cam 13 and at one end. And a power transmission lever 26 movable in the directions of arrows c and d in which the elongated hole 26c penetrated is engaged with the pivot shaft 23a.

The link mechanism 22 includes a pair of drive-side links 28 protruding from the sector gears 23 and 24 and a pair of driven links whose one ends are connected to connection shafts 30 of the moving tables 4 a and 4 b. Side link 29, and a link pin 31 is inserted into a long hole penetrating the distal end of the drive side link 28 and a circular hole penetrating the other end of the driven side link. By caulking the both ends, the ends of the two links 28 and 29 are connected to each other, and the coil spring 32 fitted in the long hole of the drive side link 28 is pressed against the link pin 31.

In the above configuration, at the time of loading, the rotating cam 13 is rotated in the direction of arrow e by the cam motor 17 and the power transmission lever 26 is pulled in the direction of arrow c in the state shown in the solid line of FIG. Each moving table 4a, 4b is advanced a through the two sector gears 23, 24 and the link mechanism 22, and each of the moving tables 4a, 4b is urged by the coil spring 32 in the loading direction. The magnetic tape t is pulled out of the tape cassette T by the movable guide posts 5a and 5b by pressing the positioning tapes 4a and 4b against the positioning pins 18 to stop at the loading position (see the phantom line in FIG. 6 and FIG. 8). It is wound around the head cylinder 2. At the time of unloading, the reverse operation is performed to return the magnetic tape t to the tape cassette T.

[0007]

[Problems to be solved by the invention]

 In the above-described conventional configuration, the link pins 31 and the coil spring 32 are used to connect the two links 28 and 29 of the link mechanism 22, so that the number of parts is large, and the link pin 31 is connected to the two links 28 and 29. After inserting the link pin 31, both ends of the link pin 31 need to be caulked, and the coil spring 32 needs to be fitted into the long hole, which complicates the structure and increases the manufacturing cost.

Therefore, based on the description in Japanese Patent Application Laid-Open No. 7-272362, each driven side link 29 is formed of a leaf spring, and a spliced body integrally formed at one end thereof is connected to each of the moving tables 4a and 4b. It is conceivable that the shaft 30 is pressed against the shaft 30 and a circular hole penetrating the other end is fitted to a shaft protruding from the distal end of the drive side link 28. In this case, the driven side link 29 made of a leaf spring is considered. Is complicated and the production cost is high.

The present invention has been made in view of the above-mentioned conventional drawbacks, and has as its object to provide a magnetic tape device having a loading mechanism with a small number of parts and a simple structure.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is characterized in that a pair of left and right long holes are formed in a chassis with a head cylinder interposed therebetween, and the pair of movable tables movable along the respective long holes. There is provided a link mechanism comprising a pair of drive side links that are vertically erected by a driving means and reciprocally rotated by driving means, and a pair of driven side links connected to each of the moving tables. A magnetic tape is drawn out from a tape cassette by each of the movable guide posts and is wound around the head cylinder by advancing each movable table along each of the long holes via the link mechanism by means. The tape device is characterized in that the pair of driven-side links are formed by linear springs.

[0011] According to the above configuration, the pair of driven-side links is formed of a linear spring, and the structure is simple, so that the manufacturing cost can be reduced.

According to a second aspect of the present invention, in the first aspect, a loop portion is formed by bending a central portion of the pair of linear springs, and the loop portion is elastically deformed. The feature is that each mobile platform is biased in the loading direction by the biasing force.

According to the above configuration, each movable table is urged in the loading direction by the urging force generated by elastically deforming the loop formed at the center of the pair of linear springs. Since there is no need to provide a separate biasing means, the number of parts can be reduced and the manufacturing cost can be reduced.

According to a third aspect of the present invention, in the device of the first or second aspect, a ring portion is formed by bending one end of the pair of linear springs into a circular shape, and the ring portion is connected to each of the movable bases. , And is rotatably fitted to a connecting shaft protruding therefrom.

According to the above configuration, the linear springs and the movable bases are integrally formed only by fitting the ring formed at one end of the pair of linear springs to the connection shaft projecting from the movable bases. It can be connected in a strategic manner.

According to a fourth aspect of the present invention, in the device according to any one of the first to third aspects, the connecting shaft portion is formed by bending the other end portions of the pair of linear springs at substantially right angles. The connecting shaft portion is rotatably inserted into an insertion hole penetrating through the distal end portions of the pair of drive side links.

According to the above configuration, the linear shafts formed at the other end portions of the pair of linear springs are simply inserted into the insertion holes penetrating through the distal end portion of the drive side link, and the respective linear springs and the drive shaft are driven. The side links can be integrally connected.

According to a fifth aspect of the present invention, in the device according to the fourth aspect, the tip end side of the pair of linear springs is bent at a substantially right angle from the connecting shaft portion to form a retaining portion. Features.

According to the above configuration, since the retaining portion is formed on the distal end side of the connecting shaft portion of the pair of linear springs, there is a possibility that the connecting shaft portion may unexpectedly come out of the insertion hole of the drive side link. Absent.

According to a sixth aspect of the present invention, in the device of the fourth or fifth aspect, a concave portion is formed at a distal end portion of the pair of driving side links from the side surface of the distal end portion to the insertion hole, It is characterized in that a holding member is provided, which is detachably fitted to the concave portion and holds down the connecting shaft portion of the linear spring inserted into the insertion hole.

According to the above configuration, the connecting shaft portion of the linear spring can be easily inserted into the insertion hole through the concave portion of the drive-side link, and the pressing member can be fitted into the concave portion to form the wire. The connecting shaft of the spring can be reliably held down so as not to come off from the insertion hole.

According to a seventh aspect of the present invention, in the device of the sixth aspect, the pair of drive side links are formed of synthetic resin, and the drive link and the pressing member are integrally formed via an elastic piece. It is characterized by having.

According to the above configuration, since the pressing member is formed integrally with the drive link via the elastic piece, the number of components does not increase, and the manufacturing cost can be reduced.

[0024]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a loading mechanism of a magnetic tape device according to an embodiment of the present invention, in which a pair of driven links 29 comprises a linear spring 29A. In the configuration other than the above, the same parts as those of the conventional example shown in FIGS.

In the above configuration, the operation when loading from the state shown by the solid line in FIG. 1 and FIG. 6 (see the phantom line in FIG. 2 and FIG. 6) and the operation when changing to the unloading state are almost the same as before. The description is omitted.

As shown in FIG. 4, the linear spring 29A includes a link portion 29a extending horizontally and linearly, and a loop portion 29b formed by spirally curving a central portion of the link portion 29a. A ring portion 29c formed by curving one end of the link portion 29a in a circular shape; a vertically extending connecting shaft portion 29d formed by bending the other end of the link portion 29a at substantially a right angle; And a retaining portion 29e formed by bending the front end side at an almost right angle from 29d.

The drive-side link 28 is formed of a synthetic resin, and as shown in FIG. 4, has an insertion hole 34 and a concave portion 35 formed at the distal end thereof. 36 are provided.

The insertion hole 34 extends through the center of the distal end of the drive side link 28. The recess 35 has a recess main body 35 a reaching the insertion hole 34 from the side of the distal end of the drive side link 28. And a groove 35b formed in the inner part on both sides of the groove.

As shown in FIGS. 4 and 5, the pressing member 36 engages with the member main body 36a that fits into the concave main body 35a, and protrudes from both ends of the member main body 36a to engage with the groove 35b. The holding member 36 and the drive-side link 28 are integrally formed via a thin elastic piece 37.

The connection procedure of the pair of linear springs 29A will be described based on the above configuration. As shown in FIG. 3, only the ring part 29c is fitted to the connection shaft 30 of each of the moving tables 4a and 4b. Each linear spring 29A can be connected to each of the moving tables 4a and 4b.

Further, as shown in FIG. 5A, in a state where the concave portion 35 is opened, the connecting shaft portion 29 d is inserted into the insertion hole 34 through the concave portion 35, and as shown in FIG. Then, by simply pressing the pressing member 36 into the recess 35 and engaging the engaging claw 36b with the groove 35b, the pressing member 36 presses the connecting shaft portion 29d in the insertion hole 34, and each linear spring 29A and the drive side link 28 can be connected.

When the pair of linear springs 29A are connected as described above, the loop portions 29b of the linear springs 29A are elastically deformed to urge the movable tables 4a and 4b in the loading direction. There is no need to provide a separate means. In addition, since the retaining portion 29e abuts against the lower surface of the drive side link 28, there is no possibility that the connecting shaft portion 29d may come off from the insertion hole 34 unexpectedly.

[0033]

[Effect of the invention]

 According to the first aspect of the present invention, the pair of driven side links is formed of a linear spring, and the structure thereof is simple, so that the manufacturing cost can be reduced.

According to the second aspect of the present invention, each movable table is urged in the loading direction by an urging force generated by elastically deforming a loop formed at the center of the pair of linear springs. Since there is no need to separately provide an urging means, the number of parts can be reduced and the manufacturing cost can be reduced.

According to the third aspect of the present invention, the ring portions formed at one end of the pair of linear springs are simply fitted to the connecting shafts protruding from the respective moving tables, so that the respective linear springs and the respective moving members are moved. The table and the table can be connected integrally.

According to the invention of claim 4, each of the linear shafts formed at the other end of the pair of linear springs is inserted into the insertion hole penetrating the distal end of the drive side link. The spring and the driving side link can be integrally connected.

According to the fifth aspect of the present invention, since the retaining portion is formed at the tip end side of the connecting shaft portion of the pair of linear springs, the connecting shaft portion is inadvertently inserted from the insertion hole of the drive side link. There is no risk of being pulled out.

According to the present invention, the connecting shaft portion of the linear spring can be easily inserted into the insertion hole through the concave portion of the drive side link, and the pressing member is fitted into the concave portion. By doing so, it is possible to reliably press the connecting shaft portion of the linear spring so as not to separate from the insertion hole.

According to the invention of claim 7, since the pressing member is formed integrally with the drive link via the elastic piece, the number of parts does not increase and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of an unloaded state of a magnetic tape device according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part in the loading state.

FIG. 3 is a view taken along the line AA in FIG. 2;

FIG. 4 is an exploded perspective view of the main part.

FIGS. 5A and 5B are enlarged plan views of main parts showing a procedure for connecting a drive side link and a linear spring.

FIG. 6 is a schematic plan view of a magnetic tape device.

FIG. 7 is a plan view of a main part of a conventional magnetic tape device in an unloaded state.

FIG. 8 is a plan view of a main part in the loading state.

[Explanation of symbols]

 Reference Signs List 1 chassis 2 head cylinder 3a long hole 3b long hole 4a movable base 4b movable base 5a movable guide post 5b movable guide post 21 power transmission mechanism (drive means) 22 link mechanism 28 drive side link 29A linear spring 29b linear spring loop Portion 29c Ring portion of linear spring 29d Connecting shaft portion of linear spring 29e Retaining portion of linear spring 34 Insertion hole 35 Depressed portion 36 Pressing member 37 Elastic piece T Tape cassette t Magnetic tape

Claims (7)

[Utility model registration claims] 1. A pair of left and right long holes are formed in a chassis with a head cylinder interposed therebetween, and movable guide posts are erected on a pair of movable tables movable along the respective long holes, and reciprocated by driving means. A link mechanism comprising a pair of driven side links that are rotated and a pair of driven side links connected to each of the movable bases is provided, and at the time of loading, each of the movable bases is driven by the drive means via the link mechanism. In the magnetic tape device, the movable guide post pulls out the magnetic tape from the tape cassette and winds the magnetic tape around the head cylinder, and the pair of driven links are linear springs. A magnetic tape device comprising: 2. A loop portion is formed by curving a central portion of the pair of linear springs, and each movable table is urged in a loading direction by an urging force generated by elastically deforming the loop portion. 2. The magnetic tape device according to claim 1, wherein: 3. A ring portion is formed by bending one end of the pair of linear springs in a circular shape, and the ring portion is rotatably fitted to a connection shaft protruding from each of the movable tables. 3. The magnetic tape device according to claim 1, wherein: 4. An insertion hole formed by bending the other end of the pair of linear springs at a substantially right angle to form a connection shaft, and penetrating the connection shaft at the end of the pair of drive side links. 4. The magnetic tape device according to claim 1, wherein the magnetic tape device is rotatably inserted in the magnetic tape device. 5. The magnetic tape device according to claim 4, wherein a tip end side of the pair of linear springs with respect to a connecting shaft portion is bent at substantially a right angle to form a retaining portion. 6. A distal end of the pair of drive-side links is formed with a concave portion reaching the insertion hole from a side surface of the distal end portion, and a wire removably fitted into the concave portion and inserted into the insertion hole. 6. The magnetic tape device according to claim 4, further comprising a holding member for holding the connecting shaft of the spring. 7. The drive link according to claim 6, wherein the pair of drive links are formed of a synthetic resin, and the drive link and the pressing member are integrally formed via an elastic piece.
The magnetic tape device according to claim 1.