JP3348583B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can change the distance between a pair of reel bases on which a supply tape reel and a take-up tape reel on which a magnetic tape as an information recording medium is wound are mounted by a reel base moving mechanism. And a so-called compatible type consumer VCR in which two or more tape cassettes having different sizes can be selectively mounted on a reel base.
More particularly, the present invention relates to a limiter mechanism for positioning a reel base at a position corresponding to a tape cassette having a different size.

[0002]

2. Description of the Related Art Heretofore, as a limiter mechanism for positioning such a reel base at a position corresponding to a tape cassette having a different size, the applicant of the present invention has previously disclosed Japanese Patent Laid-Open No. 5-1.
No. 71733 discloses a recording / reproducing apparatus.

FIG. 8 shows a large cassette 59 having a wide reel base interval.
FIG. 9A is an operation diagram of the reel base moving mechanism in use, and FIG.
FIG. 9 is an operation diagram of the reel base moving mechanism in a state where the small cassette 59B with a narrow reel base interval is used.

[0006] The whole reel base moving mechanism is denoted by reference numeral 60, and the reel base moving mechanism 60 is supported by a mechanical chassis 61. Reference numerals 62 and 63 denote a pair of left and right “U” shaped reel stand holding members. A substantially middle portion is rotatably supported on the mechanical chassis 61 by fulcrum shafts 62a and 63a. Reel stands 64, 65 are rotatably supported at the rotating ends (inward ends) of both reel stand holding members 62, 63. Also, reel base gears 64a, 65a are provided integrally with the reel bases 64, 65, and a swinging gear 66 as a driving member can be selectively engaged with the reel base gears 64a, 65a. .

The range of rotation of the reel holders 62 and 63 about the fulcrum shafts 62a and 63a is regulated by a pair of left and right stoppers 67a and 67b and 68a and 68b. , The interval between the reel bases 64 and 65 can be moved.

Reference numerals 69 and 70 denote rotating fulcrum gears, which are provided coaxially with the fulcrum shafts 62a and 63a of the reel base holding members 62 and 63, and are always engaged with the reel bases 64 and 65.
A tension regulator mechanism, a brake mechanism, and a clutch mechanism (not shown) are provided on the rotation fulcrum gears 69 and 70 or a gear train connected to the gears.

Reference numeral 71 denotes a swing arm.
One end of the swing arm 71 is configured to be swingable about a center shaft 72, and a long hole 73 formed at the other end of the swing arm 71 is freely inserted into a drive pin 75 provided at an eccentric position on a swing drive 74. It is fitted.

Reference numeral 76 denotes an interlocking member which interlocks with the movement of the swing arm 71 described above. The interlocking member 76 has a vertically long hole 77 formed at the center thereof engaged with a guide pin 78 provided on the mechanical chassis 61. ing. And the interlocking member 76
A horizontal elongated hole 79 formed at the center thereof is engaged with a pin 80 protruding from the swing arm 71, and the interlocking member 76 connects the pins 81, 81 provided at both ends thereof to the above-described pair of reel stand holding members 62, Slots 82, 8 formed at the outer ends of
2 is engaged.

The oscillating drive 74 is attached to a center shaft 74a on the mechanical chassis 61 so as to be able to oscillate within a range of a rotation angle θ ₁ of 180 ° or more. Is provided.

Reference numeral 83 denotes a limiter spring which serves as a tension spring, and a pair of limiter arms 84a, 84 forming a pair of scissors.
It is stretched between one ends of 4b. The pair of limiter springs 84a and 84b are rotatably supported by a fulcrum shaft 85,
In addition, the limiter arms 84a and 84b are provided with engaging grooves 84c and 84d, respectively, to support the fulcrum shaft 7 of the swing arm 71.
2 is pinched by the spring force of the limiter spring 83.
Reference numeral 86 denotes a stopper that holds the spring sides of the limiter arms 84a and 84b at a predetermined interval.

The reel base moving mechanism 6 configured as described above.
In the case of 0, the swing driving body 74 is rotated clockwise or counterclockwise, so that the swing arm 71 can swing around the central axis 72 by the drive pin 75.

For example, when the swing arm 71 swings to the position shown in FIG. 8 by the rotation of the swing driving body 74, a pair of left and right reel stand holding members 62, 63 via the interlocking member 76.
Are rotated about the respective fulcrum shafts 62a and 63a, and abut against one of the stoppers 67a and 68a.
As a result, the space between the two reel stands 64 and 65 is moved to a position that matches the reel space of the large cassette 59A. By further rotating the swing driving body 74 from this operation position,
The swing arm 71 has a function of rotating about the pin 80 as a center of rotation, so that the center shaft 72 moves upward in FIG. 8 and pushes up one of the limiter arms 84 a to raise the limiter spring 8.
3, the reel bases 64 and 65 are spring-biased in a direction positioned at the reel interval of the large cassette.

On the other hand, when the swing arm 71 swings to the position shown in FIG. 9 by the rotation of the swing driving body 74, a pair of left and right reel stand holding members 62, 63 are moved via the interlocking member 76 to the respective fulcrum shafts. It is pivoted about 62a, 63a and abuts against the other respective stoppers 67b, 68b.
As a result, the space between the two reel bases 64 and 65 moves to a position that matches the reel space of the small cassette 59B. By further rotating the swing driving body 74 from this operation position,
As described above, the swing arm 71 rotates about the pin 80 as a rotation center. Therefore, the center shaft 72 moves downward in FIG. 9, and the other limiter arm 84b is pushed down to operate the limiter spring 83. Therefore, the reel bases 64 and 65 are spring-biased in the direction positioned at the reel interval of the small cassette.

[0014]

However, the limiter mechanism attached to the reel base moving mechanism 60 has a problem that it is complicated, has a large number of parts, and requires a lot of trouble in assembling.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has greatly reduced the number of parts constituting a limiter mechanism, and has improved reliability in which assemblability can be simplified and operation functions are simplified. It is an object of the present invention to obtain a recording / reproducing apparatus having a high reel base limiter mechanism.

[0016]

[SUMMARY OF] To achieve the above object, a recording and reproducing apparatus according to the present invention, a reel mount spacing of a pair to be changed by a reel moving mechanism, two or more sizes on the reel stand is Reel moving mechanism in a recording / reproducing apparatus in which different tape cassettes of different types can be selectively inserted.
A fixed member supported on the top and one end of the fixed member
Molded so that it faces the rotation fulcrum axis of the reel moving mechanism.
And a pair of elastically deformable leaf springs.
When the table moves to either the large or small tape cassette position,
The leaf spring bends in contact with the rotation fulcrum shaft of the reel moving mechanism,
Either large or small reel base
Limiter mechanism biasing to tape cassette position
It is provided with .

With this configuration, the reel base is large.
When moving to one of the tape cassette positions,
The leaf spring of the limiter mechanism contacts the rotation fulcrum axis of the
To bend, and the reel base is
Make sure that the tape cassette is
Can be.

[0018]

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a reel stand limiter mechanism of a recording / reproducing apparatus according to the present invention applied to a compatible video cassette recorder (hereinafter, referred to as a VCR). This will be described with reference to FIG.

FIG. 1 is a plan view showing a main part of the mechanical deck of the VCR device according to the present embodiment when a small tape cassette 4A is mounted, and FIG. 2 is a plan view when a large tape cassette 4B is mounted. .

First, FIG. 1 shows a case where a small tape cassette is mounted.
The tape running system of the VCR device will be described with reference to FIG. Reference numerals 1 and 2 denote a pair of supply-side reel base and take-up reel base arranged on the mechanical chassis 3. The tape supply side reel 5 and the tape take-up side reel 6 of the small tape cassette 4A indicated by phantom lines are mounted on the two reel bases 1 and 2.

The magnetic tape T pulled out from the tape supply reel 5 of the small tape cassette 4A is
, The roller 8a of the tension regulator 8 on the supply side,
The magnetic tape T is helically wound from the entrance side of the rotary drum 12 having the magnetic head via the vertical guide 10 and the inclined guide 11 supported by the slide member 9, and the magnetic tape T is pulled out from the exit side of the rotary drum 12 and Guide 14 and vertical guide 1 supported by
5, a tape traveling system that is wound on the tape winding side reel 6 by the roller 18a of the tension regulator 18 on the winding side and the guide roller 19 via the capstan 16 and the pinch roller 17.

Here, the slide members 9, 13 can be moved to a loading position and an unloading position along a slide groove 20, 21 formed in the mechanical chassis 3 by a loading gear (not shown) via a link.
The slide members 9 and 13 are positioned on the fixed blocks 22 and 23 at the loading position.

The two reel stands 1 and 2 are supported by reel stand holding members 26 and 27 whose center axes of rotation rotate about fulcrum shafts 24 and 25, respectively. That is, both reel bases 1 and 2 are mounted on both reel base holding members 26,
The rotation of the reel 27 allows the reel spacing to be changed. This reel stand interval is performed by the reel stand moving mechanism 30.

FIG. 3 shows the structure of the limiter mechanism 60 according to the present invention together with the structure of the reel base moving mechanism 30.
2 shows a plan view as viewed from the back side of FIG.

The reel base moving mechanism 30 includes a first arm member 31, a second arm member 32, and a drive gear 33.

The first arm member 31 and the second arm member 32 disposed on the back side of the first arm member 31, that is, the second arm member 32 disposed on the mechanical chassis 3 side are connected to each other by a shaft pin 34 at a substantially intermediate portion.
The axial hole of the arm member 31 is a play hole 31a.
Base end of first arm member 31 (right end in FIG. 3)
Is rotatably supported by a shaft pin 35 erected from the mechanical chassis 3, and a guide slot 36 is provided at a tip end.

At both ends of the second arm member 32, there are formed cam holes 37, 38 having a mirror-symmetrical "U" shape, and the cam holes 37, 38 are provided in the reel stand holding members 26, 2 described above.
The rotating pins 26a and 27a hanging down from 7 are engaged. Relief holes 39a, 39b are formed in the mechanical chassis 3 at positions corresponding to the movement ranges of the pivot pins 26a, 27a. Further, when the reel base holding members 26, 27 pivot around the fulcrum shafts 25, 26, the rotation center axes 42, 43 of the reel bases 1, 42 along the arc-shaped holes 40, 41 formed in the mechanical chassis 3. Moves. Incidentally, 44
Reference numerals a, 44b, and 44c denote guide holes for enabling the parallel movement of the second arm member 32, and are engaged with shafts 45a, 45b, and 45c provided on the mechanical chassis 3.

On the other hand, the above-described drive gear 33 is disposed on the distal end side of the first arm member 31. The drive gear 33 has a small-diameter second drive gear 46 integrally formed coaxially, and is rotatably supported by the mechanical chassis 3. A driving pin 47 projecting from the surface of the driving gear 33 is
In the guide slot 36 of the arm member 31 of FIG. The drive gear 33 meshes with a pinion 49 that rotates in conjunction with sliding movement of a rack (not shown) stored in the rack support member 48.

On the other hand, the limiter mechanism 90 is supported on the surface of the first arm member 31 of the reel base moving mechanism 30. The limiter mechanism 90 is made of, for example, a metal member such as phosphor bronze, and as shown in FIG. 5, a mounting plate 91 and plate spring portions 92a and 92b which are bent upright from both sides of the mounting plate 91 and stand upright.
And shaft holding pieces 93a and 93b which are oppositely bent and extended from lower ends of the distal ends of the leaf spring portions 92a and 92b.

In the limiter mechanism 90 constructed as described above, the mounting plate 91 is caulked and fixed to the first arm member 31 with a rivet or the like, and the shaft holding pieces 93a and 93b are fixed to the first arm member 3.
The shaft pin 35 serving as one rotation fulcrum is arranged so as to sandwich it. Here, the shaft hole of the first arm member 31 that rotates about the shaft pin 35 as a fulcrum shaft is a vertically long hole 31b. Further, a tension coil spring 94 is stretched between the distal end portions of the leaf spring portions 92a and 92b so that the leaf spring portions 92a and 92b
Is biased in the closing direction.

The reel base moving mechanism 30 and the limiter mechanism 9
0 is configured as described above, and its operation will be described below.

The operation position shown in FIG. 3 is an operation state in which the reel bases 1 and 2 correspond to the small tape cassette.

That is, from the operation state shown in FIG.
When the first arm member 31 rotates counterclockwise, the first arm member 31 rotates about the shaft pin 35 as a rotation fulcrum through the guide elongated hole 36 engaged with the drive pin 47 that rotates integrally therewith. , The second arm member 32 also moves integrally.
At this time, the second arm member 32 is connected to the shafts 45a, 45b, 4
5c, the parallel movement is performed. Here, a cam hole 3 formed in the second arm member 32 is formed.
Reel base holding members 26, 27 engaged with 7, 38
Are driven, the reel base holding members 26 and 27 rotate about the fulcrum shafts 24 and 25, whereby the reel bases 1 and 2 move to the center as shown in FIG. The shafts 42 and 43 abut against the ends of the arc-shaped holes 40 and 41 and stop at a position corresponding to the large tape cassette 4B. The limiter mechanism 90 operates by rotating in the counterclockwise direction about the center 34.

That is, the first arm member 31 is
When pivoted counterclockwise around the center pin 4, the shaft pin 3
5, the elongated hole 31b moves.
As shown in FIG. 7, the leaf spring portion 92a is elastically deformed and warped via one shaft holding piece 93a in contact with the shaft pin 35. For this reason, the first arm member 31 is pushed back in the direction indicated by the arrow by the spring action of the leaf spring portion 92a, and the second arm member 32 (supported by the first arm member 31) is received. 4) is similarly moved in the direction of the arrow via the shaft pin 34. Therefore, the cam holes 37 and 38 of the second arm member 32 are generated.
And the rotation pins 26a, 27 of the reel base holding members 26, 27
a is urged toward the position corresponding to the large tape cassette, that is, a limiter function is urged in the direction of positioning the reel bases 1 and 2 at the position corresponding to the large tape cassette.

The drive gear 33 is rotated clockwise via the pinion 49 by the sliding operation of the rack from the operation position shown in FIG. 4, so that the first and second arm members 31 and 32 operate in the same manner as described above. The reel bases 1 and 2 can be moved to a position corresponding to the small tape cassette 4A. At this time, the first arm member 31 is rotated clockwise around the shaft pin 34, so that the shaft pin 35
As a result, the leaf spring portion 92b is elastically deformed and warped via the other shaft holding piece 93b in contact with the shaft pin 35 as shown in FIG.
For this reason, the first arm member 31 is pushed back in the direction indicated by the arrow by the spring action of the leaf spring portion 92b, and the second arm member 32 ( (See FIG. 3) in the same manner as in the direction of the arrow via the shaft pin 34. Therefore, the rotation of the reel base holding members 26, 27 by the cam holes 37, 38 of the second arm member 32. A limiter function is obtained that urges the pins 26a and 27a toward the small tape cassette corresponding position, that is, urges the reel bases 1 and 2 toward the small tape cassette corresponding position.

As described above, the limiter mechanism 90 according to the present invention is used.
Has the advantage that the reel bases 1 and 2 can be spring-biased to the corresponding positions of the tape cassettes of different sizes with a single member so that they can be reliably positioned.

Also, the limiter mechanism 90 can be manufactured by punching a single metal member such as phosphor bronze or the like by a single press or the like, and compared with a conventional limiter mechanism composed of many parts. It can be manufactured at low cost.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

For example, in the structure of the limiter mechanism 90, a tension coil spring 94 is provided between the distal ends of the leaf spring portions 92a and 92b.
Has been described, but the leaf spring portion 92 has been described.
If the spring properties of the a and 92b themselves are sufficient, the tension coil spring 94 may not be required.

In the embodiment of the present invention, a so-called compatible type VCR apparatus capable of two kinds of tape cassettes having different sizes has been described.
It is needless to say that the present invention can be applied even when different types of tape cassettes can be used.
In addition to the device, the present invention can be widely applied to a limiter mechanism of a general recording / reproducing device.

[0042]

As described above, in the recording / reproducing apparatus according to the present invention, the reel base is in the position of the tape cassette of either large or small.
When the robot is moved to the
When the leaf spring of the cutter mechanism comes into contact and flexes,
Either large or small tape cassette with reel base
Position and ensure reliable
Data mechanism.

[0043] Further, it is possible to configure the limiter mechanism in a single member, to improve the processing and assembly of the limiter mechanism can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view of an operation state corresponding to a small tape cassette according to the present invention.

FIG. 2 is a plan view showing an operation state corresponding to a large tape cassette.

FIG. 3 is a plan view of the operation state of the reel base moving mechanism corresponding to the small tape cassette when viewed from the back surface.

FIG. 4 is a plan view of the operation state corresponding to the large tape cassette viewed from the back surface.

FIG. 5 is a perspective view of a limiter mechanism.

FIG. 6 is an operation diagram at the time of a limiter operation of a reel base when a small tape cassette is supported.

FIG. 7 is an operation diagram at the time of a limiter operation of a reel base when a large tape cassette is supported.

FIG. 8 is a plan view of an operation state of a conventional reel base moving mechanism and a limiter mechanism corresponding to a large tape cassette.

FIG. 9 is a plan view of the operation state corresponding to the small tape cassette.

[Explanation of symbols]

 1, 2 reel base 3 mechanical chassis 4A small tape cassette 4B large tape cassette 26, 27 reel base holding member 30 reel base moving mechanism 31 first arm member 31b vertically long hole 32 second arm member 33 drive gear 34 shaft pin 35 Shaft pin 90 Limiter mechanism 91 Mounting plate 92a, 92b Leaf spring portion 93a, 93b Shaft holding piece

Continued on the front page (72) Inventor Masatake Takase 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Akihiro Uetake 6-35-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sonny Inside (72) Inventor Katsuaki Ikema 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Inside (72) Inventor Katsunori Takahashi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (56) References JP-A-5-307799 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 15/32

Claims (1)

(57) [Claims] [Claim 1] to the reel base spacing of a pair can be changed by a reel moving mechanism, the recording and reproducing apparatus in which two or more different sizes tape cassette to the reel table is selectively enabled inserted, the A fixed member supported on the reel moving mechanism, and one end formed on the one end of the fixed member,
A pair of elastically deformable so as to face the pivot shaft of the mechanism
And the reel base is large or small.
When the reel is moved to the tape cassette position
The leaf spring bends in contact with the rotating fulcrum shaft of
Either the large or small reel base is set by the spring force of the leaf spring.
Limiter mechanism biasing to tape cassette position
Recording reproducing apparatus characterized by comprising a.