JP3257227B2 - Reel base locking mechanism in magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus such as a video tape recorder and a tape recorder, and more particularly, to a pair of tape reels wound around a magnetic tape rotatably housed in a tape cassette. And a reel base moving mechanism for moving the reel bases for rotating these tape reels by fitting the tape reels to each other so that a plurality of types of tape cassettes having different specifications between the tape reels can be loaded. In a reproducing apparatus, the present invention relates to a reel base locking mechanism for locking and holding a reel base moved by the reel base moving mechanism at a moving position.

[0002]

2. Description of the Related Art In a video tape recorder used for business such as a broadcasting station, by storing magnetic recording tapes having different lengths, as shown in FIG. For example, an L-type tape cassette 1L, an M-type tape cassette 1M, or an S-type tape cassette 1S is used. The L-type tape cassette 1L has a width WL of 366 mm, a height LL of 206 mm, and a thickness TL of 33 mm. The M-type tape cassette 1M has a width W of
M is 254 mm, height LM is 150 mm, thickness TM is 33 mm, and the S-type tape cassette 1S has a width WS of 172 mm and a height LS of 10 mm.
It is specified that the thickness TS is 9 mm and the thickness TS is 33 mm.

[0003] Therefore, these tape cassettes 1
As shown in the drawing, a supply-side tape reel 2A which is driven to rotate by fitting the reel bases 4A, 4B (4) on the video tape recorder side in a state of being loaded in a video tape recorder described later. The space and position relative to the take-up side tape reel 2B are different from each other.

For this reason, in a video tape recorder for business use, a plurality of types of tape cassettes 1 having different intervals between tape reels 2 can be loaded. Reel base moving mechanisms 3A, 3B (3) are provided which make the distance and position of the reel bases 4 fitted to the supply-side tape reel 2A and the take-up tape reel 2B relative to each other variable. As shown in FIGS. 10 to 12, the reel base moving mechanisms 3 are arranged symmetrically with respect to the center in the width direction of the tape cassette, and are provided on the reel bases of the supply-side tape reel 2A formed of the same components. It comprises a moving mechanism 3A and a reel base moving mechanism 3B for the winding-side tape reel 2B.

As shown in FIG. 10, the reel base moving mechanism 3 supports first and second guide rails 5A, 6A, 5B, 6B (5, 6) for movably supporting the reel base 4, respectively.
And reel frames 7A and 7B (7) for supporting the assembled reel base 4, reel motors 8A and 8B (8) for rotating and driving the reel base 4, and stopper members 9A and 9B.
(9).

The first and second guide rails 5 and 6 are supported on a die-cast apparatus base (not shown) in parallel with each other so as to be lower left and lower right.
Bearing portions are integrally formed on both sides of the die-cast reel frame 7, and these bearing portions are inserted so as to be movably supported by the first and second guide rails 5, 6. I have. Further, a driving mechanism 10A, 10
The connecting members connected to B (10) are integrally formed, and are supported by the first and second guide rails 5 and 6 by the driving mechanism 10, and the L-type tape cassette position and the M-type tape cassette It is moved to three positions, i.e., position and S-type tape cassette position.

The reel motor 8 is mounted on the reel frame 7 via vibration isolating means made of an elastic material such as rubber, and is fixed so that the reel base 4 is attached on its rotating shaft. I have. The stopper member 9 is formed in a substantially sector shape, and the end surface on the free end side is a reel frame 7.
And is rotatably supported on the bottom surface of the reel frame 7 located on the first guide rail 5 side through a support pin in an angle range of about 90 degrees so as to slightly protrude from the end surface of the reel frame 7. Although the reel base 4 is illustrated in a substantially columnar shape in the drawing, for example, a plurality of engaging projections and recesses respectively engaging with a plurality of engaging projections and recesses formed on the inner peripheral wall of the reel hole of the tape reel 2 are shown. The part is formed on the outer peripheral wall.

The drive mechanism 10 configured to drive the reel base moving mechanism 3A on the supply tape reel 2A side and the reel base moving mechanism 3B on the take-up tape reel 2B side configured as described above.
A and 10B are a pair of drive pulleys 11A assembled and supported on the apparatus base in a state parallel to the first guide rail 5.
11B, 12A and 12B (11 and 12), and the timing belt 1 stretched over these drive pulleys 11 and 12
3A and 13B (13) and members such as a pulley drive motor (not shown).

The other end of the connecting member formed on one side of the reel frame 7 is connected to the timing belt 13. Therefore, when power is supplied to the pulley drive motor, the drive pulleys 11 and 12 rotate to drive the timing belt 13. By the operation of the timing belt 13, the reel frame 7 is supported by the first and second guide rails 5 and 6, and
Move to the position. In this way, the reel base moving mechanism 3 on the supply side tape reel 2A side via the driving mechanism 10
A and the reel base moving mechanism 3B on the take-up tape reel 2B side
Are driven at the same time, the reel base 4A on the supply tape reel 2A side and the reel base 4B on the take-up tape reel 2B side are different from each other in the distance and position of the M type shown in FIG. Tape cassette position, FIG.
12 and the S-type tape cassette position shown in FIG. 12 are set at three positions.

The reel base 4 set and operated at the three positions as described above is held in the set state by the holding mechanism (not shown) at the L-type tape cassette position or the S-type tape cassette position at both ends. At the position of the M-type tape cassette, which is the position, the reel base locking mechanism 15A on the supply side tape reel 2A side and the reel base locking mechanism 15B on the take-up tape reel 2B side, which are constituted by the same members, respectively. Locked and held.

Reel base locking mechanism 15A / 15B (15)
Are plungers 16A and 16B as shown in FIG.
Solenoids 17A and 17B (1) incorporating (16)
7), a reel base locking member 18A / 18B (18) connected to the plunger 16, respectively, and holding members 19A / 1 supporting these reel base locking members 18, respectively.
9B (19) and attachment members 20A and 20B for connecting these holding members 19 and the solenoid 17 respectively.
(20) and the like.

As is well known, the solenoid 17 is constructed by incorporating a coil inside a frame-shaped yoke also serving as a frame, and a rod-shaped plunger 16 is movably combined with a center hole of the coil. The plunger 16 has stopper rings 21A, 21B (2
1) Via the coil springs 22A and 22B (22)
Is installed. These coil springs 22 are mounted in a compressed state between the stopper ring 21 and the yoke front plate, so that the solenoid 1
7 from the habit.

Each of the reel base locking members 18 has an axial tenon protruding at a tip end thereof, and has E-rings 23A and 23 for retaining through a retaining groove formed in the outer peripheral surface.
B (23) is fitted. These reel base locking members 18 are connected coaxially with the plunger 16 by fitting the tenon and the tenon groove and inserting the connecting pins 24A and 24B (24).

The reel base locking member 18 connected to the plunger 16 in this manner is inserted through the bearing bushes 25A and 25B (25) incorporated in the holding member 19.
Holding member 19 precisely formed by die casting
Is formed integrally with an unillustrated device base such that one side in the longitudinal direction where one side of the bearing bush 25 is opened faces in parallel with the one side where the stopper member 9 of the reel frame 7 is disposed. It is placed and fixed on the mounting portion. The holding member 19 has a pair of mounting portions 26A, 27A, 26B on the other side surface in the longitudinal direction.
27B (26, 27) are integrally formed, and the mounting member 20 is screwed and fixed via these mounting portions 26, 27. The mounting member 20 screwed to the holding member 19 is screwed and fixed to the yoke ceiling plate of the solenoid 17.

In the reel stand locking mechanism 15 configured as described above, the power supply to the solenoid 17 is normally cut off.
Due to the elastic force of the coil spring 22 mounted on the plunger 16, the reel base locking member 18 largely protrudes from the bearing bush 25 of the holding member 19, and as shown in FIG. Is engaged. As a result, the reel base 4A on the supply tape reel 2A side and the reel base 4B on the take-up tape reel 2B set at the M-type tape cassette position are securely held in the set state.

Thereafter, the reel base moving mechanism 3 moves the reel base 4A on the supply side tape reel 2A side and the reel base 4B on the take-up tape reel 2B side from the M-type tape cassette position to the L-type tape cassette shown in FIG. The power is supplied to the solenoid 17 when the position is set or moved to any of the S-type tape cassette positions shown in FIG. Then, the coil of the solenoid 17 is excited, and the plunger 16 is attracted by the elastic force of the coil spring 22.

By the movement of the plunger 16,
The reel base locking member 18 can move in the bearing bush 25 of the holding member 19 so that the reel frame 7 can move so that the engagement state of the tip end of the reel base locking member 18 with the stopper member 9 of the reel frame 7 is released. I do. When the reel base moving mechanism 3A on the supply tape reel 2A side and the reel base moving mechanism 3B on the take-up tape reel 2B side are simultaneously driven via the driving mechanism 10, the supply side tape reel 2A side is driven. Reel stand 4A and winding tape reel 2
The reel base 4B on the B side is moved from the M-type tape cassette position to the L-type tape cassette position or the S-type tape cassette position, which is different from the M-type tape cassette in the distance and position.

[0018]

As described above, the video tape recorder for business use has a reel base moving mechanism 3 for moving the reel bases 4 so that the distances and positions of the reel bases 4 are different from each other. And a reel base locking mechanism 15 that locks and holds the tape cassette 1 at a position in the middle of movement, so that a plurality of types of tape cassettes 1L, 1M, and 1S having different external dimensions of the tape cassette 1 can be loaded. In particular, the reel base locking mechanism 15 has a large number of components as a whole, and the holding member 19 is formed of a die-cast component in order to perform accurate positioning. Therefore, the holding member 19
Increases the cost of parts, and the reel base locking member 18
There is a problem that the cost of parts is further increased because a metal bearing bush 25 is incorporated in order to movably support the shaft in the axial direction.

For example, a pressed part is generally about four or five times cheaper than a die-cast part, and it is considered that the holding member 19 is made of a pressed part to reduce the cost. However, there is a problem in press parts that accuracy such as right-angle bending accuracy is harder to obtain than die-cast parts. In the holding member 19 having the function of aligning the reel frame 7 and the reel base locking member 18, the bottom surface, which is the mounting surface of the device base, faces the reel frame 7 from which the reel base locking member 18 projects. The dimensional accuracy with respect to the rising side surface, which is a surface, is extremely important. Therefore, when these holding members 19 are formed as pressed parts, the bottom surface portion, which is the mounting surface of the device base, and the rising side surface portion, which is the surface facing the reel frame 7 from which the reel base locking member 18 projects, are highly accurate. Therefore, there is a problem that the positional accuracy of the reel base locking member 18 is deteriorated.

Further, the above-mentioned conventional reel base locking mechanism 1
5, a stopper ring 21 attached to the plunger 16 for locking a coil spring 22 that gives the reel base locking member 18 a protruding behavior from the holding member 19.
Also, a groove such as a part such as the E-ring 23 which is a stopper member of the reel base locking member 18 or the reel base locking member 18 for mounting the E-ring 23 is required.

Therefore, according to the present invention, the holding member for holding the reel base locking member constituting the reel base locking mechanism is made into a pressed part, and the cost is reduced by reducing the components of the reel base locking mechanism. To provide a reel base locking mechanism in a magnetic recording / reproducing apparatus in which a holding member is accurately attached to an apparatus base so that a reel base locking member and a reel frame are accurately aligned. It has been proposed for the purpose.

[0022]

A reel stand locking mechanism in a magnetic recording / reproducing apparatus according to the present invention which has achieved the above object is achieved by moving a reel base for rotating a tape reel by a reel base moving mechanism. Provided in a magnetic recording / reproducing apparatus capable of loading a plurality of types of tape cassettes having different intervals and positional specifications between a pair of tape reels around which a magnetic tape is wound. A reel in a magnetic recording / reproducing apparatus which is arranged on a mounting portion provided on an apparatus base along a moving path of a reel base moved by a reel base moving mechanism and locks and holds the reel base at a moving position. It is configured as a platform locking mechanism.

The reel stand locking mechanism is formed so as to face at least the bottom surface portion which is joined and fixed to the mounting portion of the apparatus base, facing the reel base moving path from the bottom surface section, and faces the reel base moving path. A holding member formed by bending a material plate in which a side surface portion having a guide hole formed therein and a positioning hole formed so as to straddle the side surface portion and the bottom surface portion; and the holding member. And a driving member coupled to the other end of the reel stand locking member, the one end of which is supported by the guide hole so as to be freely retractable into and out of the movement path of the reel stand. And a drive means for moving the reel base locking member so that the reel base locking member is supported by the holding member and protrudes and retracts in the movement path of the reel base. The holding member functions to perform positioning with the reel base by abutting a side surface portion with a positioning pin that is provided upright on a mounting portion of the device base and penetrated through the positioning hole.

Further, in the reel base locking mechanism in the magnetic recording / reproducing apparatus according to the present invention, the holding member has a mounting portion which rises and faces the side surface portion where the guide hole is formed. A mounting portion that is relatively joined to the mounting portion is formed integrally with a mounting member that couples the driving means of the reel base locking member and the holding member via the portion. A connecting pin guide groove into which one end of a connecting pin for connecting the reel base locking member and the driving member is fitted is formed in an attaching portion of at least one of the holding member and the attaching member. The guide groove restricts the amount of movement of the reel base locking member.

[0025]

According to the reel base locking mechanism of the magnetic recording / reproducing apparatus according to the present invention constructed as described above, the bottom surface of the holding member is fixedly attached to the mounting portion formed on the apparatus base. In this fixed state, a positioning pin erected on the mounting portion of the device base is penetrated through a positioning hole formed across the bottom surface and the side surface. The positioning pin precisely holds the position with respect to the guide rail supporting the reel frame, and abuts against the inner surface of the side portion of the holding member so that the side portion and the reel frame supported by the guide rail can be accurately positioned. Position. Therefore, the reel base locking member that moves while being supported by the holding member accurately positions and locks the reel base, so that the holding member that supports the reel base locking member can be manufactured at low cost. It can be formed by pressed parts.

The connecting pin guide groove formed in the mounting portion for connecting the holding member and the driving means holding member is engaged with the connecting pin for connecting the reel base locking member and the driving means. The amount of movement of the locking member in the axial direction is regulated. Therefore, the E-ring as the stopper means and its fitting groove are not required for the reel base locking member. In addition, the connecting pin functions as stopper means of the coil spring that gives the reel base locking member a protruding behavior, and a stopper member such as a stopper ring mounted on the driving means is not required.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. Embodiment Reel base locking mechanism 30A
30B (30), the above-described professional video tape recorder, that is, the external-size specification and the supply-side tape reel 2
It is possible to load three types of tape cassettes 1 of S type tape cassette 1S, M type tape cassette 1M, and L type tape cassette 1L having different specifications of the space between A and the take-up side tape reel 2B. The reel base moving mechanism 3 of the supply side tape reel 2A that adjusts and moves the interval and the position of the reel bases 4A and 4B that are fitted to the tape reels 2A and 2B and driven to rotate according to the specifications of the tape cassette 1.
A and reel base moving mechanism 3B of take-up side tape reel 2B
Provided in a professional video tape recorder having

More specifically, the reel stand locking mechanism 30 is located between the S-type tape cassette position and the L-type tape cassette position corresponding to the supply-side tape reel 2A and the take-up tape reel 2B. It is provided at each of the M-type tape cassette positions. Therefore, other configurations and operations of the reel base moving mechanism 3 and the like other than the reel base locking mechanism 30 are the same as those of the above-described conventional apparatus, and the same members are denoted by the same reference numerals and description thereof will be omitted below.

The reel base locking mechanism 30 is composed of the same members, and as shown in FIG.
Lock members 32A and 32B (3
2), holding members 33A and 33B (33) for movably supporting the reel base locking member 32, and a plunger 35
Solenoid 34A.3 incorporating A.35B (35)
4B (34) and members such as mounting members 36A and 36B (36) for combining the holding member 33 and the solenoid 34, and a pair of mounting portions 31A1, 31A2 and 31 formed on a die-cast device base.
B1 and 31B2 (31) are arranged and fixed.

As for the solenoid 34 and the plunger 35, the same members as those of the above-described conventional solenoid 17 are used, and the cylindrical coil of the solenoid 34 is constructed by incorporating a cylindrical coil inside a frame-shaped yoke also serving as a frame. The plunger 35 is movably incorporated in the center holes 37A, 37B (37). The plunger 35 has, as shown in FIG.
38B (38) are formed, and the connecting pin 40A is formed.
-Pin holes 39A and 39B into which 40B (40) is fitted
(39) is drilled. The coil springs 41A and 41B (41) are mounted on the plunger 35.

As shown in FIG. 8, each of the reel base locking members 32 has an axial tenon 42A, 42B (4
2) are protrudingly formed, and pin holes 43A and 43B (43) into which the connecting pins 40 are fitted are formed. After the tenon 42 is fitted into the mortise groove 38, the reel base locking member 32 fits the connecting pin 40 into the pin hole 43 and the pin hole 39 communicating with the connecting pin 40, thereby forming the plunger 35. Be combined. As shown in FIG. 8, the connecting pin 40 largely protrudes from the outer peripheral surface of the plunger 35 and functions as stopper means for the coil spring 41 to hold the coil spring 41 in a compressed state.
Therefore, the plunger 35 is given a projecting behavior from the solenoid 34 by the elastic force of the coil spring 41.

The holding member 33 is formed by a pressed part formed by subjecting a metal plate material to an outer shape punching, punching or bending process. As shown in FIG. 1, the holding member 33 includes bottom surfaces 44A and 44B (44), and side surfaces 46A and 46B (46) formed on one side of the bottom surface 44 on the reel frame 7 side. Bearing side portions 48A and 48B (48) in which a tongue portion formed by a pair of notch grooves is formed upright on the other side of the bottom surface portion 44 so as to face the side surface portion 46, and the widthwise side of the bottom surface portion 44. The whole of the pair of mounting side surfaces 50A1, 50A2, 50B1, and 50B2 (50) protruding from the ends is formed in a substantially upward U-shape.

At the bottom portion 44, mounting holes 55A1, 55A2, 55B formed in a pair of mounting portions 31 parallel to each other and orthogonal to the reel frame 7 in the apparatus base.
1, 55B2 (55) corresponding to the mounting holes 45A1, 4
5A2 · 45B1 and 45B2 (45) are respectively formed. The side portion 46 and the bearing side portion 48 include:
The reel base locking member guide hole 47
A.47B (47) and 49A.49B (49) are respectively formed. The mounting side surface 50 has an upper end bent in the horizontal direction, and mounting holes 51A1, 51A2, 51B1, and 51B2 (51) are formed in the bent portions.

As shown in FIG. 1, a mounting member 36 for combining the holding member 33 and the solenoid 34 has a plate-shaped solenoid mounting portion and a holding portion which is stepped down by bending one end of the mounting portion into a substantially crank shape. Member mounting part 59
A.59B (59), and the solenoid mounting portion is provided with mounting screws 56A1, 56A2, 56B1, 56B.
By being jointed and fixed to the yoke ceiling surface of the solenoid 34 via 2 (56), it is combined with the solenoid 34 integrally. Further, the mounting member 36 is joined and fixed on the mounting side surface portion 50 via mounting screws 57A1, 57A2, 57B1, 57B2 (57) in which the holding member mounting portion 59 is screwed into the mounting hole 51. 33 and are combined together.

By combining the holding member 33 and the solenoid 34 via the mounting member 36 in this manner, the reel base locking member 32 coupled to the tip of the plunger 35 is shown in FIGS. As described above, the reel base locking member guide holes 4 formed with the axes aligned with the side surface portion 46 and the bearing side surface portion 48 of the mounting member 36, respectively.
7 and 49 are supported through.

One end of a connecting pin 40 for connecting the plunger 35 and the reel stand locking member 32 is engaged with the holding member mounting portion 59 of the mounting member 36, thereby connecting the connecting pin 40 for guiding the connecting pin 40. Guide groove 60A ・ 6
0B (60) is formed in a direction orthogonal to the reel frame 7. The connecting pin guide groove 60 is used to move the leading end of the reel base locking member 32 from the side surface 46 of the holding member 33 to the movement path of the stopper member 9 of the reel frame 7 during the driving operation of the reel base locking member 32 described later. The first to face
And the connecting pin 4 is moved so as to move over the range between the position of the stopper member 9 and the second position formed from the moving path of the stopper member 9.
Holding member mounting portion 5 having a length for regulating the operation amount
9 is drilled.

As described above, the holding member 33 combined with the solenoid 34 via the mounting member 36 is mounted and fixed on the mounting portion 31 of the apparatus base as shown in FIG. As described above, the holding member 33 has its bottom surface 4
4, mounting holes 45 are formed in the mounting portion 31 of the device base corresponding to the mounting holes 45, and the mounting screws 45 are aligned with the mounting holes 45, 55. 58A1, 58A2, 58B1, 58
By screwing the B2 (58), the holding member 33
Is securely joined and fixed on the mounting portion 31 of the device base. As described above, the holding member 33 joined and fixed to the die-casting device base in which the dimensional accuracy of each part is formed relatively accurately is a reel base moving mechanism supported by the guide rails 5 and 6 supported on the device base. The position of the reel frame 3 relative to the reel frame 7 is accurately maintained.

As described above, the holding member 33 supports the reel base locking member 32 and performs a positioning operation between the reel base locking member 32 and the reel frame 7.
Therefore, the reel base locking member 32 is connected to the reel frame 7.
For accurate positioning with respect to
In addition to the mounting position with respect to the apparatus base, it is necessary to maintain the dimensional accuracy of the rising of the side surface portion 46 with respect to the bottom surface portion 44, in other words, the parallelism of the opposing surfaces of the side surface portion 46 and the reel frame 7 facing each other. For this reason, in the embodiment reel base locking mechanism 30, an accurate alignment structure between the side surface portion 46 of the holding member 33 and the reel frame 7 is provided.

That is, as shown in FIG. 7, the holding member 33 is formed by piercing a bottom surface portion 44 joined and fixed to the mounting portion 31 of the apparatus base and a side surface portion 46 facing the reel frame 7. The positioning holes 53A1, 53A2, 53B1, and 57B2 (5
3) is provided. On the other hand, the mounting portion 3 of the device base
On one side, positioning pins 54A1, 54A2, 54B1, 54B2 (54) are integrally erected corresponding to the positioning holes 53. Therefore, when the holding member 33 is placed on the mounting portion 31, the positioning holes 53
The positioning pin 54 is relatively engaged from the bottom portion 44 side. As described above, the positioning hole 53 is formed in the holding member 33 so as to extend from the bottom surface portion 44 to the side surface portion 46, so that the peripheral side surface of the positioning pin 54 is
Abuts the inner surface of the

As described above, this positioning pin 54
By being erected integrally with the die-cast device base, the position of the device relative to the guide rails 5 and 6 supported on the device base is extremely accurately maintained. Therefore, the holding member 33 formed by pressing the metal plate material is used to hold the side surface portion 46 and the reel base moving mechanism 3 by the positioning pin 54 abutting against the inner surface of the side surface portion 46.
The parallelism of the opposing surface facing the reel frame 7 is accurately held to support the reel base locking member 32. As a result, as shown in FIGS. 3 to 6, the reel base locking member 32 is accurately positioned in the moving path of the reel frame 7 and performs the retracting operation.

The reel base locking mechanism 30 constructed as described above operates in the same manner as the conventional reel base locking mechanism 15 described above, and switches between the L-type tape cassette position and the S-type tape cassette position. The M-type tape cassette 1M is locked and held at the intermediate position of the M-type tape cassette.
That is, in the embodiment, the power supply to the solenoid 34 is normally cut off, and the coil spring 41 mounted on the plunger 35 in a compressed state between the front surface of the core of the solenoid 34 and the connecting pin 40 is disconnected. 4 and 6, the reel base locking member 32 projects from the side surface portion 46 of the holding member 33 into the moving path of the reel frame 7 and engages with the stopper member 9 as shown in FIGS. And the reel base 4 is firmly locked and held.

When the L-type tape cassette or the S-type tape cassette is loaded in the magnetic recording / reproducing apparatus, the reel base moving mechanism 3 is operated, and the reel frame 7 is supported by the guide rails 5 and 6 and the L-type It is moved to the tape cassette position or the S-type tape cassette position. During the operation of the reel base moving mechanism 3, the reel base locking mechanism 30 is driven to move the reel base locking member 32 backward from the moving path of the reel frame 7, as shown in FIGS.

That is, when power is supplied to the solenoid 34 and the coil is excited, the plunger 35
The suction operation is performed against the elastic force of the coil spring 41. By the operation of the plunger 35, the reel base locking member 32 is supported by the holding member 33, and its front end retreats from the side surface 46, releases the locked state of the reel frame 7, and moves the reel frame 7. Is possible.

Thus, via the reel base moving mechanism 3,
The reel base 4A on the supply-side tape reel 2A side and the reel base 4B of the take-up tape reel 2B are set and moved from the M-type tape cassette position to a desired L-type tape cassette position or S-type tape cassette position. When the M-type tape cassette is loaded again in the magnetic recording / reproducing apparatus, the power is supplied to the solenoid 34 and the plunger 3 is turned on.
As shown in FIGS. 4 and 6, the reel base locking member 32 is retracted from the moving path of the reel frame 7 via the reel base moving mechanism 3 and the supply side tape reel 2A side via the reel base moving mechanism 3. Is moved to the L-type tape cassette position or the S-type tape cassette position.

Thereafter, when the power supply to the solenoid 34 is cut off, the plunger 35 is
The resilient force of 1 causes the reel 34 to move out of the solenoid 34, and the reel base locking member 32 integrally connected to the plunger 35 is supported by the holding member 33 to move into the moving path of the reel frame 7. I do.

The reel base locking member 32 is provided in each of FIGS.
As shown in FIG.
The reel frame 7 protrudes largely from the reel base locking member guide 47 and abuts against the side surface of the stopper member 9 disposed on the bottom surface of the reel frame 7 to lock and hold the reel frame 7. In this case, the amount of protrusion of the reel base locking member 32 from the side surface portion 46 of the holding member 33 is regulated by the connection pin abutting on the front end of the connection pin guide groove 60 as shown in FIG. . As described above, the reel base locking member 32
The reel unit 7 is accurately aligned with the moving path of the reel frame 7 that is supported by the holding member 33 and moved by the reel base moving mechanism 3, and performs the retracting operation. Therefore, the position of the tape reel 2 set and moved from the L-type tape cassette position to the M-type tape cassette position or from the S-type tape cassette position to the M-type tape cassette position is accurately positioned.

The present invention is not limited to the above-mentioned professional video tape recorder, but is also applicable to a tape recorder or the like in which a plurality of types of tape cassettes having different external dimensions are loaded and used. In addition, the present invention is not limited to the reel base locking mechanism 30 but is developed as follows. That is, the embodiment reel base locking mechanism 30
It is arranged on the device base corresponding to the position of the mold tape cassette,
The reel base 4 fitted to the tape reel 2 of the loaded M-type tape cassette 1M is positioned.
It is also arranged at the position of the type tape cassette or the position of the S type tape cassette so that the reel base 4 fitted to the tape reel 2 of each of the loaded L type tape cassette 1L and S type tape cassette 1S is positioned. You may comprise.

The positioning hole 53 formed in the holding member 33 over the bottom surface portion 44 and the side surface portion 46 is
The holding member 33 can be adjusted to the mounting portion 31 of the apparatus base by making the four-sided portion an elongated hole with respect to the outer diameter of the positioning pin 54.
4, and the mounting hole 45 side may be formed as an elongated hole. Furthermore, the so-called mortise joint structure is adopted as the coupling structure between the reel stand locking member 32 and the plunger 35, but a known coupling structure such as joining the half-section convex portions by abutting each other may be appropriately adopted. Of course. The connecting pin guide groove 60 in which the connecting pin 40 formed in the holding member mounting portion 59 of the mounting member 36 is engaged is also formed by, for example, bending the upper end of the bearing side surface portion 48 of the holding member 33 in the horizontal direction. It may be configured to be formed.

[0049]

As described above in detail, according to the reel stand locking mechanism in the magnetic recording / reproducing apparatus according to the present invention, the reel stand is moved so that tape cassettes having different external dimensions can be loaded. A holding member that supports a reel base locking member that locks and holds the reel base moved by the mechanism,
Since it is formed as a pressed part, the cost of the part is reduced, and a positioning pin is provided upright on the device base which is penetrated by a positioning hole formed so as to straddle the bottom and side surfaces of the holding member. By contacting the inner surface of the side surface portion, the positioning with the reel base is performed, so that the reel base locking member can lock and hold the reel base at an accurate position. Further, as compared with the conventional reel base locking mechanism, a bearing bush incorporated in the holding member is not required, and the number of components can be reduced.

Further, according to the reel base locking mechanism in the magnetic recording / reproducing apparatus according to the present invention, the moving amount of the reel base locking member connects the reel base locking member to the driving member of the driving means. The connecting pin is engaged with a connecting pin guide groove formed in the mounting member or the holding member that combines the holding member and the driving member that support the reel stand locking member, and is regulated so as to be controlled by the reel base. A stopper member such as an E-ring or the like fitted to the stop member and a groove for fitting the stopper member are unnecessary, and the connecting pin gives the reel stand locking member a protruding behavior into the reel stand moving path. As a result, the stopper member is not required, and the number of parts and the number of assembling steps can be reduced as a whole.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a reel base locking mechanism provided in a professional video tape recorder shown as an embodiment of the present invention, including a reel base locking mechanism on a supply side tape reel side,
FIG. 3 is an exploded perspective view of the entire mechanism, together with a reel stand locking mechanism on a take-up tape reel side.

FIG. 2 is a perspective view of an essential part for explaining a configuration of a reel stand locking mechanism and a reel stand moving mechanism in the professional video tape recorder.

FIG. 3 is a plan view of a main part of the reel base locking mechanism, showing a state in which a reel base locking member is retracted from a moving path of a reel frame and the reel base is movable;

FIG. 4 is a plan view of a relevant part of the reel base locking mechanism, showing a state in which the reel base locking member is protruding into the movement path of the reel frame and the reel base is immovable.

FIG. 5 is a partially cutaway side view of the main part of the reel base locking mechanism, showing a state in which the reel base is movable with the reel base locking member retracted from the moving path of the reel frame and the reel base is movable;

FIG. 6 is a partial cutaway side view of the main part of the reel base locking mechanism, showing a state in which the reel base locking member protrudes into the movement path of the reel frame and the reel base is immovable. .

FIG. 7 is a perspective view of an essential part for explaining a state in which a holding member holding the reel base locking member is positioned by a positioning pin.

FIG. 8 is a perspective view of an essential part for explaining a coupling structure between a reel base locking member and a plunger of a solenoid as a driving member thereof.

FIG. 9 is an explanatory diagram showing the positional relationship between the external size specification and the tape reel of a commercial tape cartridge having different external size specifications.

FIG. 10 is a plan view of a main part of a conventional video tape recorder for business use, illustrating a state where a reel base is set at a position suitable for a tape reel of an M-type tape cartridge.

FIG. 11 is a main part plan view of a conventional professional video tape recorder illustrating a state where a reel base is set at a position suitable for a tape reel of an L-type tape cartridge.

FIG. 12 is a plan view of a main part of a conventional video tape recorder for business use, illustrating a state where a reel base is set at a position suitable for a tape reel of an L-type tape cartridge.

FIG. 13 shows components constituting a reel stand locking mechanism provided in a conventional professional video tape recorder, a reel stand locking mechanism on a supply tape reel side and a reel stand locking mechanism on a take-up tape reel side. FIG. 3 is an exploded perspective view of the entire mechanism described together with the mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape cassette 2 Tape reel 3 Reel base moving mechanism 4 Reel base 5, 6 Guide rail 7 Reel frame 8 Reel motor 10 Drive mechanism 30 Reel base locking mechanism 31 Attachment part (of apparatus base) 32 Reel base locking member 33 Holding Member 34 Solenoid (means for driving the reel base locking member) 35 Plunger (driving member for the reel base locking member) 36 Mounting member 40 Connecting pin 44 Bottom part (of holding member) 46 Side part (of holding member) 47 Reel base Locking member guide hole 48 Bearing side surface 50 Mounting side surface 53 Positioning hole 54 Positioning pin 60 Connection pin guide groove

Claims (2)

(57) [Claims] 1. A reel base for rotating and driving a tape reel is moved by a reel base moving mechanism.
A magnetic recording / reproducing apparatus capable of loading a plurality of types of tape cassettes having different intervals and positional specifications between a pair of tape reels around which a magnetic tape is wound is provided, and the reels depend on the type of the loaded tape cassette. A reel base in a magnetic recording / reproducing apparatus arranged on a mounting portion provided on an apparatus base along a moving path of a reel base moved by a base moving mechanism to lock and hold the reel base at a moving position. In the locking mechanism, at least a bottom surface joined and fixed to the mounting portion of the device base, and a guide hole formed upright from the bottom surface so as to face the moving path of the reel base and facing the moving path of the reel base. A holding member formed by bending a material plate in which a provided side portion and a positioning hole formed so as to straddle the side portion and the bottom portion are formed; And a driving member coupled to the other end of the reel stand locking member, the one end being supported by the guide hole so as to be freely retractable in the movement path of the reel stand. Drive means for moving the reel base locking member so as to protrude and retract in the movement path of the reel base supported by the holding member, wherein the holding member is erected on a mounting portion of the apparatus base. A positioning pin which penetrates the positioning hole abuts on a side surface portion to perform positioning with the reel base, and a reel base locking mechanism in the magnetic recording / reproducing apparatus. 2. A holding member is provided with a mounting portion rising up to face a side surface portion in which a guide hole is formed, and a driving means of a reel base locking member and a holding member are connected via the mounting portion. An attachment portion to be joined to the attachment portion is integrally formed on the attachment member to be connected, and the reel base locking member and the drive member are connected to the attachment portion of at least one of the holding member and the attachment member. 2. The magnetic device according to claim 1, wherein a connecting pin guide groove into which one end of the connecting pin is fitted is formed, and the moving amount of the reel stand locking member is regulated by the connecting pin guide groove. Reel base locking mechanism in recording / reproducing device.