JPH08153353A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE: To load small and large cassettes to the respective prescribed positions by positioning a reel base to the position with the space of reels for the small cassette and holding it in such a manner that a slide body is slid in one direction by a driving means. CONSTITUTION: When the small cassette 1 is loaded, the driving means is energized by the detecting operation of a detection means, and by the driving means, the slide body 24 is slid in one direction to position the reel base 38 to the position with the reels space of the small caseette 1 and hold it. A pair of supporting levers 2 is also linked therewith, and a pin of cassette means and a switch 30 are moved to the prescribed position to enable the small cassette 1 to load to the prescribed position. When the large cassette 2 is loaded, the slide body 24 is moved to another direction by the driving means while abutting and pressurizing on the supporting shaft of reel base 38, then the reel bases 38, 39 are positioned and held to the position with the reels space of the large cassette 2. A pair of supporting levers is linked therewith to enable the large cassette 2 to load to the prescribed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel mount moving device of a cassette loading device for selectively loading a plurality of types of cassettes having different sizes (length, width, height) and reel intervals.

[0002]

2. Description of the Related Art With the spread of video tape recorders (hereinafter referred to as VTRs), portable VTRs are required to be small and lightweight, while stationary VTRs are required to have a long recording / playback time. . For these VTRs, a plurality of types of cassettes having different sizes and different reel intervals are used according to the purpose of use. Therefore, a reel base moving device that has a simple structure, is inexpensive, and has high reliability is required so that a plurality of types of cassettes can be mounted on the same VTR.

An example of this type of reel stand moving device is disclosed in Japanese Unexamined Patent Publication No. 2-210648 (G11B).
15/32). The relevant technique is shown in FIG. In the figure, the small cassette 1 is shown on the left half of the center line C0, and the large cassette 2 is shown on the right half. First, small cassette 1
When is mounted, the small cassette 1 is detected and the drive motor 3 operates. The worm wheels 5a and 5b are rotated in opposite directions via the coaxial worm 4. In this case, the worm wheel 5a is clockwise (CW)
The worm wheel 5b rotates counterclockwise (CCW).

Levers 6a and 6b that rotate integrally with the worm wheels 5a and 5b, and a link 7 connected to them.
The rotating members 10 and 11 on which the reel bases 8 and 9 are mounted by the a and 7b are the shafts 12a and 1 of the reel motors 12 and 13, respectively.
It rotates to CW and CCW centering on 3a, respectively. As a result, the pins 10a and 11a of the rotating members 10 and 11 are brought into contact with and positioned by the stoppers 14a and 14b, respectively.

When the large cassette 2 is mounted, the operation reverse to the above is performed, and the pins 10a, 1 of the rotating members 10, 11 are carried out.
1a is brought into contact with and positioned by stoppers 15a and 15b, respectively. By the above-described operation, the spacing between the reel stands 8 and 9 is L1 for the small cassette 1, and the spacing between the reel stands 8 and 9 is L2 for the large cassette 2.
The reel stand spacing is appropriate for each cassette 1, 2.

Further, in Japanese Laid-Open Patent Publication No. 4-49557 (G11B 15/32), as shown in FIG. 9, a small cassette 1 (not shown) is arranged from a position of a reel stand interval L2 suitable for the large cassette 2. ) Is attached, the detection means (not shown) detects and the swing drive gear 18 rotates to CCW. The rotation of the gear 18 causes the swing arm 19 to slide the connecting member 20 in the arrow A direction. Since the reel base holding members 10 and 11 on which the reel bases 8 and 9 are respectively mounted are connected to both ends of the connecting member 20, the holding member 1
Numerals 0 and 11 rotate around the shafts 16a and 17a of the relay gears 16 and 17 to CCW and CW, respectively, and the stopper 14
The a and 14b are contacted and positioned. That is, the reel stand 8,
9 moves to the positions 8'and 9'in the figure, and the small cassette 1
The reel stand spacing L1 conforming to

[0007]

In the former configuration, when the reel stand is moved by the worm and the worm wheel, the worm and the worm wheel bite due to variations in the on / off timing of the worm drive motor, resulting in malfunction. There is a problem that the reel base is not completely positioned on the stopper and becomes unstable.
Further, in the latter configuration, the reel base holding member is brought into contact with the stopper, but since the position of the stopper and the position of the reel shaft are eccentric, the stability at the time of fixing the reel base is insufficient.

Further, the conventional cassettes have different widths and depths, but the thicknesses (heights) of the cassettes are all the same, and it is not necessary to consider the correspondence in the height direction. There is a problem that we cannot handle cassettes.

[0009]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided a magnetic recording / reproducing apparatus having a reel base moving mechanism capable of mounting a plurality of types of cassettes having different reel intervals. A pair of rotating members for rotatably holding the reel base that moves to the base, a pair of support levers having a plurality of support pins of different heights corresponding to a plurality of types of cassettes, and positioning for positioning the reel base at two positions. A slide body having a means and an engagement pin that engages with the elongated hole of the support lever, and a drive means for driving the slide body by the driving force of the drive source are provided. In addition, a switch that comes into contact with the back surfaces of a plurality of types of cassettes is provided on one of the pair of support levers.

The slide body is provided with a notch portion of about 90 °, and the end edge of the guide groove is formed in a shape oblique to the moving direction of the slide body. Further, a single reel lock release pin is provided on the slide body to unlock the reels of a plurality of types of cassettes to be mounted. Further, the driving means is constituted by a rotating lever which rotates following the cam groove of the cam gear, and one end of the rotating lever is engaged with the boss coaxial with the reel lock release pin.

[0011]

With the above construction, when the small cassette is mounted, the drive means is operated by the detection operation of the detection means (not shown), and the slide body slides in one direction by the drive means to move the reel stand. The small cassette is positioned and held at the reel interval. At the same time, the pair of support levers are also interlocked to move the cassette support pin and the switch to a predetermined position so that the small cassette can be mounted at a predetermined position.

When the large cassette is mounted, the slide member slides in the other direction while being pressed against the reel base support shaft by the driving means, and the reel base is positioned and held at the reel interval position of the large cassette. At the same time, the pair of support levers are also interlocked to move the cassette support pin and the switch to a predetermined position, so that the large cassette can be mounted at a predetermined position.

When the cassette is mounted, the single reel lock release pin provided on the slide body engages with the reel lock release hole of the cassette, and the reel lock is released.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view when a small cassette is mounted, FIG. 2 is a front view thereof, FIG. 3 is a plan view when a large cassette is mounted, FIG. 4 is a front view thereof, and FIG. 5 is a partially enlarged view of a reel stand positioning state. FIG. 7 is a diagram showing an engagement state of a cassette and a positioning pin, and FIG. 7 is a diagram showing a positional relationship between two types of cassettes.

1 to 7, 1 is a small cassette having a reel lock releasing hole 1a and positioning holes 1b, 1b, and 2 is a reel lock releasing hole 2a and a positioning hole 2
A large cassette having b and 2b, 21 is a main chassis,
Reference numeral 22 is a sub-chassis provided with a pair of guide grooves 23, 23. The sub-chassis 22 has elongated holes 22a, 22
a, and guide pins 22b and 22b facing downward and positioning pins 22c and 22c facing upward. 23
Reference characters a and 23b (see FIG. 5) are end edges with which a spindle of a reel stand, which will be described later, abuts.

Reference numeral 24 is a slide body in which a reel lock release pin 25 is fixedly planted. The slide body 24 has elongated holes 24a and 24a into which the guide pins 22b and 22b are inserted, and an elongated hole 22a of the sub chassis 22. , 22a are provided with pins 24b and 24c. The reel lock release pin 25 also has a protruding pin 25a on the back surface of the slide body 24. Reference numerals 24d and 24e are notched portions formed on the slide body 24 at an angle of about 90 °, and cooperate with end edges 23a and 23b that are formed obliquely with respect to the moving direction of the slide body 24 so as to cooperate with the reel. Positioning means for positioning and holding the support shaft of the table by supporting it at three points.

Reference numeral 26 has cassette support pins 26a and 26b, a support lever which is urged by a spring 27 in a clockwise direction (CW) around the shaft 21a on the main chassis 21, and 28 is on the main chassis 21. The switch lever is always urged by a spring 29 in a counterclockwise direction (CCW) around the shaft 21b. The lever 28 has a detection switch 30
Also, the attachment 32 on which the cassette support pins 31a and 31b are mounted is attached so as to be rotatable within a predetermined angle range and constantly biased to the CCW by a spring (not shown). The levers 26 and 28 are provided with elongated holes 26c and 28a, respectively, into which the pins 24b and 24c are inserted.

33 is a drive motor having a worm gear 34, 35 is a relay gear in which two-stage gears 35a and 35b are integrally formed, 36 is a cam gear having a cam groove 36a, 37
Is a rotating lever that can rotate around a shaft 21c on the chassis 22. The rotation lever 37 is provided with a follow-up pin 37a that engages with the cam groove 36a and an elongated hole 37b into which the protruding pin 25a is inserted.

38 is a supply reel stand having a gear 38a, 39 is a take-up reel stand having a gear 39a, 40,
41 is a relay gear, 42 and 43 are gears 42a and 4 respectively.
3a is a reel motor. The reel stand 38,
39 is rotatably supported by rotating members 44 and 45 that rotate around the shafts of the relay gears 40 and 41, respectively (in FIG. 5, only the supply side is shown). The rotating member 4
4 and 45 are CCW and CW respectively Torsion spring 4
6 and 47, the support shafts 38b and 39b (see FIG. 4) of the reel bases 38 and 39 are constantly slid.
Is in contact with the end surface 24d (or 24e).

Next, the operation of the present invention will be described. FIG.
[FIG. 6] is a plan view of a mechanism for mounting the small cassette 1. When the large cassette 2 is mounted now in the state of FIG.
First, the apparatus detects that it is the large cassette 2 (the detection mechanism is not shown), and the drive motor 33 is activated. Motor 33
The rotational driving force of is transmitted to the cam gear 36 via the worm gear 34 and the relay gear 35. C of the cam gear 36
The rotation to CW causes the rotation lever 37 to rotate to CW while pressing the protruding pin 25a on the back surface of the slide body 24 via the follower pin 37a. As a result, the slide body 24 moves downward in the drawing while being guided by the guide pins 22b and 22b.

Along with that, the reel shafts 38b, 39b
, But slides along the guide groove 23 while being pressed by the inclined end surface 24f of the slide body 24. That is, the rotating member 44,
45 rotates about the axes of the relay gears 40 and 41 to CW and CCW, respectively. At the same time, the support lever 26 and the switch lever 28 are also connected to the pins 24b, 2 of the slide body 24.
4c is pressed, and C is centered on the shafts 21a and 21b, respectively.
Rotate to CW and CW. The follower pin 37a is in the cam groove 36
When it reaches the outermost periphery of a, the rotation lever 37 is rotated to the CW about the shaft 21c as much as possible to bring the slide body 24 to the position shown in FIG. In this state, the reel shafts 38b and 39b are connected to the cutout portion 24d of the slide body 24 and the edge 2 of the guide groove 23.
It is reliably positioned and held by 3b (see FIG. 5).

At this time, as shown in FIGS. 3 and 7, the reel lock release pin 25 is engaged with the reel lock release hole 2a of the large cassette 2 to release the lock of the reel. Hole 2
Pins 22c and 22c engage with b and 2b in the state of FIG. 6 (b), but the bottom surface of the large cassette 2 is securely attached to the positioning holding holes 2c and 2c as shown in FIG. 6 (a). Positioned and held at. The cassette support pin 26b and the cassette support pin 31b on the attachment 32 are held in contact with the bottom surface of the large cassette 2, respectively. At that time, the cassette support pins 31a are set to the large cassette 2 as shown in FIG. 6 (c).
Since it penetrates into the characteristic detecting hole 2d, no trouble occurs. The switch 30 contacts the back surface of the large cassette 2. The reel bases 38 and 39 are connected to the reel motors 42 and 4 respectively.
By the rotation of 3, the reel gears 38a and 39a are rotationally driven via the relay gears 30 and 41, respectively.

Next, when the small cassette 1 is mounted, the above-mentioned reverse operation is performed and the state shown in FIG. 1 is obtained. At this time, as shown by the solid line in FIG. 5, the reel shafts 38b and 39b are sandwiched between the cutout portion 24e and the end edge 23a of the slide body 24, and reliably positioned and held. That is, the reel lock release pin 25 is inserted into the reel lock release hole 1b of the small cassette 1.
Are engaged, and the lock of the reel is released. Further, the pins 22c and 22c are engaged with the positioning holes 1b and 1b in the state shown in FIG. 6A, and the cassette support pin 26a and the cassette support pin 31a are held in contact with the bottom surface of the small cassette 1. At that time, the support pins 26b for the large cassette 2,
Since all of 31b are separated from the bottom surface of the small cassette 1 by h1, there is no problem.

[0024]

With the above structure, a reel base, a cassette support member, a reel lock release pin, and a characteristic are provided so that a plurality of cassettes having different widths, depths, and heights can be mounted by a single motor and cam gear. It is possible to provide a device in which the detection switches and the like can be moved in a lump and which can cope with different cassette thicknesses.

Furthermore, since a single reel lock release pin is provided on the slide body for large and small cassettes,
The number of parts, man-hours, and design space can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view when a small cassette is mounted.

FIG. 2 is a front view when a small cassette is attached.

FIG. 3 is a plan view when a large cassette is attached.

FIG. 4 is a front view when a large cassette is mounted.

FIG. 5 is a partially enlarged view of the reel base positioning state.

FIG. 6 is a view showing an engaged state of a cassette and a positioning pin.

FIG. 7 is a diagram showing a positional relationship between two types of cassettes.

FIG. 8 is a plan view of a conventional example with a cassette attached.

FIG. 9 is a plan view when another conventional cassette is mounted.

[Explanation of symbols]

 1 small cassette 2 large cassette 23 guide groove 23a end edge 23b end edge 24 slide body 24b pin (engaging means) 24c pin (engaging means) 24d notch (positioning means) 24e notch (positioning means) 25 reel Lock release pin 26 Support lever 28 Support lever (switch lever) 30 Switch 33 Drive motor 37 Rotating lever (driving means) 38 Reel stand 39 Reel stand 44 Rotating member 45 Rotating member

Claims (8)

[Claims] 1. A magnetic recording / reproducing apparatus comprising a reel base moving mechanism capable of mounting a plurality of types of cassettes having different reel intervals, wherein the reel base moving to two positions along a guide groove is rotatable. A pair of rotating members for holding, a pair of support levers having a plurality of support pins corresponding to the plurality of types of cassettes, a positioning means for positioning the reel base at two positions, and an engagement for engaging the support levers. A magnetic recording / reproducing apparatus comprising: a slide body having means; and drive means for driving the slide body by a driving force of a drive source. 2. A magnetic recording / reproducing apparatus comprising a reel base moving mechanism capable of mounting a plurality of types of cassettes having different reel intervals, wherein the reel base moving to two positions along a guide groove is rotatable. A pair of rotating members for holding, a support lever having a plurality of support pins corresponding to the plurality of types of cassettes, a switch lever on which a switch that abuts the back surface of the plurality of types of cassettes is mounted, and the reel base. A magnetic recording / reproducing device comprising: a slide body having a positioning means for positioning at two positions and an engagement means for engaging with the support lever; and a drive means for driving the slide body by a driving force of a drive source. apparatus. 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the positioning means is a notched portion formed on the slide body and having an angle of about 90 °. 4. The magnetic recording / reproducing apparatus according to claim 1, wherein an end edge of the guide groove is oblique to a moving direction of the slide body. 5. The magnetic recording / reproducing apparatus according to claim 1, wherein the plurality of support pins are set to different heights corresponding to the plurality of types of cassettes. 6. The engagement means is a pin that engages with an elongated hole of the support lever.
Magnetic recording and reproducing device. 7. The magnetic recording / reproducing apparatus according to claim 1, wherein the slide body is provided with a single reel unlocking pin to unlock the reels of the plurality of types of cassettes to be mounted. 8. The drive means is a rotary lever that rotates following a cam groove of a cam gear, and the rotary lever is engaged with a boss coaxial with the reel lock release pin. The magnetic recording / reproducing apparatus according to claim 7.