JP3253191B2 - 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 (VTR).

[0002]

2. Description of the Related Art Generally, in a magnetic recording / reproducing apparatus,
As shown in FIG. 7, a pair of reel shafts 2a, to which a reel hub of the tape cassette is mounted at a predetermined position on the metal plate 1,
2b, a tape loading system for pulling out a magnetic tape corresponding to the reel shafts 2a and 2b and mounting the magnetic tape on a rotary cylinder on which a rotary head is mounted, and a tape guide for running and guiding the tape-loaded magnetic tape A plurality of mounting members 3... Constituting a tape drive system including a mechanism, a mode control system, and the like are installed, and the mounting members 3. Therefore, in such a magnetic recording / reproducing apparatus, the accuracy of the tape loading system, the tape drive system, the mode control system, and the like is determined according to the installation accuracy of the mounting members 3 installed on the metal plate 1. Thus, in manufacturing a magnetic recording / reproducing apparatus such as a VTR, the installation accuracy has a great influence.

The mounting members 3a, which require relatively low strength and accuracy, such as a hook for mounting a brake member of a tape drive system and a support portion of a mode control system, are made of polyoxy. It is installed by outsert molding with a thermoplastic resin such as methylene (POM). The cylinder mounting body for fixing the rotating cylinder, the tape guide post for regulating the magnetic tape with respect to the rotating cylinder with high precision, and the mounting members 3b with strong strength and high accuracy such as the reel shafts 2a and 2b are required. For example, a method has been adopted in which a cutting is performed using a metal material or the like and the processed product is mounted on the metal plate 1 using an attachment means such as a screw 4 or a caulking.

However, in the above magnetic recording / reproducing apparatus, the number of components for configuring a tape loading system, a tape drive system, and the like is very large, and the management of the components is very troublesome. There is a problem that the production including the assembling work is very troublesome. Also,
Since a relatively large amount of metal material is used and screwing and crimping work are required, there is a problem that the weight is increased and it is difficult to promote downsizing.

[0005] Therefore, it has been considered to improve the above-mentioned disadvantages by outsert molding the mounting member 3b, which is strictly required in terms of strength and precision, on the metal plate 1 using a resin material. . In this case, it is not necessary to simply outsert the mounting member using a resin material having excellent characteristics. It is required to realize accurate outsert molding.

For example, as a target of such a mounting member, as shown in FIG. 8, a magnetic tape is pulled out from a tape cassette and is supplied around a rotary cylinder on which a rotary head is mounted. There is a catcher 6 that positions the member 5 (only one is shown in FIG. 8) at the loading completion position of the guide grooves 1a and 1b of the metal plate 1 to realize stable tape running. The catcher 6 is attached to the guide groove 1a provided in the metal plate 1 at a position where the loading is completed, and the tape pull-out member 4 is positioned at the position where the loading is completed with high accuracy. It also serves as a tape pullout member assembly hole at the time. For this reason, when the catcher 6 is outsert molded, it is not necessary to simply realize the outsert molding, and it is necessary to consider the relationship with the tape loading system.

[0007]

As described above, in the conventional magnetic recording / reproducing apparatus, the number of parts is very large, the production including the parts management and the assembly is very troublesome, and the size and weight are small. It is difficult to promote the conversion.

The present invention has been made in view of the above circumstances, and can reduce the number of parts with a simple configuration, thereby simplifying the production and promoting the reduction in size and weight. It is an object of the present invention to provide a magnetic recording / reproducing apparatus as described above.

[0009]

According to the present invention, a tape pull-out member is movably accommodated in a guide groove on a metal plate, and the tape pull-out member is transferred along the guide groove via a loading mechanism. A magnetic recording / reproducing apparatus in which a magnetic tape of a tape cassette is tape-loaded from an unloading position to a loading position where the magnetic tape is mounted around a rotary cylinder ;
From the loading position in the direction opposite to the loading direction.
It extends along the locus of loading
Made is, the tape pulling member in a predetermined position of the extending設箇plants, notches for incorporation housing provided in the guide groove, the positioning in the unloading position of the tape drawing member as done in the loading mechanism It is composed.

[0010]

According to the above construction, the tape pull-out member is movably housed in the guide groove from the notch, and is connected to the loading mechanism so as to be positioned at the unloading position. Then, the assembly to the guide groove is completed. Therefore, the outsert molding of the catcher can be performed at the loading completion position of the guide groove,
It is possible to promote the outsert molding of the mounting member of the tape loading system, so that the number of assembly members is reduced as compared with the related art, and it is possible to simplify the assembling work and to promote the reduction in size and weight.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a main part of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. A pair of supply and take-up side guide grooves 11a and 11b are formed in a metal plate 10 as cylinder mounting holes for installing a rotary cylinder. 11c. One end of each of the pair of guide grooves 11a and 11b is slightly extended from the unloading position (loading start position) in a direction opposite to the loading direction, and cutout portions 11d and 11e for assembling the pull-out member are provided at the extended portions. Are respectively formed. At the loading completion position at the other end of the guide grooves 11a and 11b, the catcher 12 is outsert molded using a thermoplastic resin material as shown in FIG. 2 (however, in FIG. 2, only the supply side catcher is shown). Is shown).

In the guide grooves 11a and 11b, a metal plate 1 is provided.
Wide parts that extend in the width direction corresponding to both sides of 0
Supply and take-up side tape pull-out members 13a, 13b for tape loading having a notch,
The guide grooves 11a and 11b are inserted and housed so as to movably sandwich the edges of the guide grooves 11a and 11b at their wide portions . Link mechanisms 14a and 14b are linked to the tape pull-out members 13a and 13b, respectively. A gear mechanism 15 is connected to the bases of the link mechanisms 14a and 14b. The driving tooth portion 16a at one end is engaged so as to transmit the driving force. Here, the tape pull-out members 13a and 13b
Guide grooves 11a, 11 via ring mechanisms 14a, 14b
b is positioned at the unloading position at one end.

A guide hole 16b is provided at one end of the drive slider 16, and a guide portion 17a of a guide support member 17 formed outsert on the metal plate 10 as shown in FIG. It is housed so as to be able to be guided in the directions of arrows A and B. The drive slider 16 is provided with the guide hole 1.
In a state in which the periphery of 6b is elastically movably supported by an elastic engagement portion 17b provided on the guide support member 17, the guide portion 1
7a movably supported in the directions of arrows A and B.

An engagement portion 16c is formed at the other end of the drive slider 16, and the engagement portion 16c is drivably engaged with, for example, a mode switching cam 18. This cam 1
Reference numeral 8 is rotatably supported on the metal plate 10 and is engaged with a driving source (not shown) so as to transmit a driving force. Accordingly, when the cam 18 is driven to rotate by transmitting the driving force from the driving source (not shown), the driving slider 16 is guided by the engaging portion 16c to move in the directions of arrows A and B. Be inspired. At this time, the drive slider 16 drives the gear mechanism 15 with the drive teeth 16a. Then
The gear mechanism 15 is linked to the link mechanism 1
4a, 14b, and the tape pull-out members 13a, 13b.
b is transferred from the unloading position (loading start position) to the loading completion position (unloading start position) along the guide grooves 11a and 11b, for example.
Tape loading is performed such that a magnetic tape wound around a tape cassette (not shown) is mounted on the rotating cylinder (not shown). Here, the tape pull-out members 13a, 13
b is positioned by the catcher 12 at the tape loading completion position.

When the cam is reversed via the driving source (not shown), the driving slider 16 is reversed and moved in conjunction with the cam, and the driving tooth portion 16a causes the gear mechanism 1 to move.
5 is driven in reverse. Then, the link mechanisms 14a, 14b
Moves the tape pull-out members 13a, 13b into the guide grooves 11a, 1
1b, it is moved from the loading completion position to the unloading position, and the tape is unloaded. Here, the tape pull-out member 13
a and 13b are link mechanisms 14a and 1 that constitute a mechanism section.
4b, the gear mechanism 15, and the driving slider 16
It is positioned at the initial unloading position in 1a, 11b.

As shown in FIG. 4, a cylinder mounting body 20a is formed in the cylinder mounting hole 11c by outsert molding as described later.
, A rotary cylinder (not shown) on which a rotary head is mounted is fixed.

As shown in FIG. 4, the metal plate 10 has a plurality of first compacts 20 including a cylinder mounting body 20a for forming a magnetic recording / reproducing apparatus. ) And a second molded body 21 (shown in white in the figure) are outsert molded at predetermined positions by selectively using first and second thermoplastic resin materials having different shrinkage rates. . These first and second molded bodies 20 and 21 include a tape driving member that constitutes a tape driving system for driving a tape including a tape guiding mechanism and a magnetic tape wound around a cassette around a rotary cylinder. A mounting member having various functional characteristics such as a tape loading member constituting a tape loading system to be mounted, a cassette guiding member constituting a cassette loading system for transferring a cassette to a tape driving position, and a mounting member such as a hook for mounting an erase head. Is included.

The first molded body 20 has strict requirements on the strength and accuracy of the cylinder mounting body 20a and the like provided in the cylinder mounting hole 11c for mounting the rotary cylinder of the tape drive system among the mounting members. The member is outsert molded with a first thermoplastic resin material having a low shrinkage and high mold transferability, for example, polyphenylene sulfide (PPS). As the PPS, for example, a shrinkage rate of 0.2 to 0.4% (flow direction), 0.6 to 0.8%
(Right angle direction), linear expansion coefficient 0.7 × 10 ^-5 cm / cm
° C (flow direction), 6.2 × 10 ^-5 cm / cm ° C
(Right angle direction), Flexural modulus 13 × 10 ^-4 kgf / cm
² , tensile strength 1800kgf / cm ² , heat deformation temperature 27
A material having mechanical characteristics of 0 ° C is used, and the temperature of the mold is 1 ° C.
Outsert molding is performed at 50 ° C.

On the other hand, the second molded body 21 is a member, such as a cassette loading guide portion 21a, which requires relatively elasticity such as a mounting hook among the above-mentioned mounting members and has relatively low strength and precision. For example, polyoxymethylene (POM) is used for outsert molding because it has a higher shrinkage ratio and lower mold transferability than the PPS. This PO
As M, for example, the shrinkage is D1.5-3.5%, the coefficient of linear expansion is 10 × 10 ⁻⁵ cm / cm · ° C., the modulus of elasticity is 2.6 × 10 ⁴ kgf / cm ² , and the tensile strength is 620 kgf.
/ Cm ² , and a heat deformation temperature of 11 ° C. are used. Outsert molding is performed at a mold temperature of 80 ° C.

The guide support member 17 has, for example, a guide portion 17a formed by outsert molding with a first thermoplastic resin material, and an elastic engagement portion 17b formed on the guide portion 17a with a second thermoplastic resin material. Outsert molding is performed integrally using As a result, the guide support member 17 has the guide portion 17a that satisfies the strength and accuracy requirements due to the characteristics of the first thermoplastic resin material, and the elastic engagement portion 17b has the characteristics of the second thermoplastic resin material. Accordingly, a demand for a desired elastic force is satisfied in addition to a demand for a moderate strength and accuracy compared with the guide portion 17a.

The magnetic recording / reproducing apparatus configured as described above firstly has a substantially plate-like metal plate 10 as shown in FIG.
Is processed and the guide grooves 11a, 11
b, cylinder mounting hole 11c, plural molded body mounting portions 11f
Is formed. At this time, notches 11d and 11e for assembling the pull-out member are formed in the guide grooves 11a and 11b at predetermined positions in the direction opposite to the loading direction from the unloading position.

Next, as shown in FIG. 6, the metal plate 10 is mounted on the first outsert molding machine 30 between the core-side and mold-side molds 30a and 30b. Here, the first outsert molding machine 30 is supplied with the first thermoplastic resin material having a low shrinkage ratio and high transferability from the resin supply source 30 c to the mold side mold 30 b of the metal plate 10. The first molded body 20 is outsert molded on the molded body mounting portion 11f (see FIG. 5B). Here, the catcher 12 is outsert molded corresponding to the loading completion position of the guide grooves 11a and 11b, and the cylinder mounting holes 11 are formed.
The cylinder mounting body 20a is outsert molded on c.

Then, the metal plate 10 on which the first compact 20 has been outsert molded is placed on the first outsert molding machine 3.
0, which is attached to a second outsert molding machine (not shown) which is substantially the same and has a higher shrinkage ratio than the first thermoplastic resin material. The second molded body 21 is attached to the molded body mounting portion 10f of
Is outsert molded (see FIG. 5C). next,
The metal sheet 10 on which the outsert molding has been completed is, as shown in FIG.
One pair of cassette guide portions 21a is bent so as to correspond to the cassette transfer direction.

Next, the metal plate 10 on which the outsert molding of the mounting member is completed as described above is subjected to the first and second molded bodies 20 such as a tape driving system, a tape loading system, a cassette loading system, etc. in an assembling process. , 21 are assembled with each other to form an internal device of the magnetic recording / reproducing apparatus. At this time, the tape pull-out members 13a, 13b are inserted into the guide grooves 11a, 11b from the notch portions 11d, 11e and mounted, and the tape pull-out members 13a, 13b are respectively attached to one ends of the link mechanisms 14a, 14b. Link link. Here, the tape pull-out members 13a and 13b
The guide grooves 11a and 11b are movably assembled and housed, and are assembled to the guide grooves 11a and 11b while being positioned via the link mechanisms 14a and 14b at the unloading positions of the guide grooves 11a and 11b. Attachment is completed. The other end of each of the link mechanisms 14a and 14b is connected to a gear mechanism 15, and this
The driving teeth 16a of the driving slider 16 engaged with the cam 18 are meshed with each other to form a tape loading mechanism.

As described above, in the magnetic recording / reproducing apparatus, the tape pull-out members 13a and 13b are provided in the guide grooves 11a and 11b at predetermined positions opposite to the loading direction from the unloading positions, and the guide grooves 11a and 11b are provided in the guide grooves 11a and 11b. Notch portions 11d and 11e for assembling and housing are provided.
1d and 11e, the tape pull-out members 13a and 13b are accommodated in the guide grooves 11a and 11b.
b and the link mechanism 14
The configuration is such that the positioning of the unloading position is performed via a and 14b.

According to this, the tape pull-out members 13a, 13a
3b can be attached to the guide grooves 11a, 11b at the time of assembling the mechanical section, so that the guide grooves 11a, 1b can be assembled.
Outsert molding of the catcher 12 is realized at the loading completion position 1b, and the outsert molding of the mounting member of the tape loading system can be promoted. As a result,
The number of assembling members is reduced as compared with the related art, so that the assembling operation can be simplified, and the reduction in size and weight can be easily promoted.

In the above embodiment, the catcher 12
Was applied to a chassis structure in which outsert molding was performed using a second thermoplastic resin material. However, the present invention is not limited to this. For example, a conventional method in which a catcher is attached to an end of a guide groove by means such as caulking is used. It is applicable to those having a chassis structure. Also in this case, since the tape pull-out member can be mounted in the guide groove after the catcher is mounted, the assembling operation can be simplified.

In the above embodiment, the case where two types of molded articles are formed by using two types of thermoplastic resin materials has been described. However, the present invention is not limited to this, and two or more types of thermoplastic resin materials are used. The present invention is also applicable to a molding system in which two or more types of molded bodies are outsert molded using a resin material.

Further, in the above embodiment, the case where the present invention is applied to a magnetic recording / reproducing apparatus chassis having a cassette loading system together with a tape driving system and a tape loading system has been described. By applying the present invention to a chassis structure of a magnetic recording / reproducing apparatus having a system and a tape loading system, substantially the same effect can be expected.

In the above-described embodiment, the description has been given of the case where the tape loading system mechanism is configured by using the drive slider, the link mechanism, and the gear mechanism. However, the mechanism of the tape loading system is not limited to this. In addition, it is possible to configure a mechanism unit of various driving systems.

Further, in the above-described embodiment, a case has been described in which the magnetic recording / reproducing apparatus is applied to a VTR. However, the present invention is not limited to this and can be applied to various magnetic recording / reproducing apparatuses such as a DAT. Therefore, it is needless to say that the present invention is not limited to the above-described embodiment, and that various modifications can be made without departing from the scope of the present invention.

[0032]

As described above in detail, according to the present invention, the number of parts can be reduced with a simple structure, and the production can be simplified and the size and weight can be promoted. It is possible to provide a magnetic recording / reproducing apparatus configured as described above.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention as viewed from the back side of a metal plate.

FIG. 2 is a diagram showing a part of FIG. 1 in detail.

FIG. 3 is a diagram showing a part of FIG. 1 in detail.

FIG. 4 is a diagram schematically illustrating the chassis structure of FIG. 1;

FIG. 5 is a view showing a manufacturing process of FIG. 4;

FIG. 6 is a view showing a first outsert molding machine used for the production of FIG. 4;

FIG. 7 is a diagram showing a chassis structure of a conventional magnetic recording / reproducing apparatus.

FIG. 8 is a diagram shown to explain a problem of the conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Metal plate, 11a, 11b ... Guide groove, 11c ... Cylinder mounting hole, 11d, 11e ... Notch part, 11f ... Molded body mounting part, 12 ... Catcher, 13a, 13b ... Tape pull-out member, 14a, 14b ... Link Mechanism, 15: gear mechanism, 16: driving slider, 16a: driving tooth portion, 16
b: guide hole, 16c: engagement part, 17: guide support member, 1
7a: guide portion, 17b: elastic engagement portion, 18: cam, 2
0, 2 first and second molded bodies, 20a: cylinder mounting body, 21a: cassette guide section, 30: first outsert molding machine, 30a, 30b: mold, 30c: resin supply source.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Mizuguchi 1-9-2 Hara-cho, Fukaya-shi, Saitama Pref. 6-195832 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 15/665

Claims (4)

(57) [Claims] 1. A tape pull-out member is movably housed in a guide groove on a metal plate, and the tape pull-out member is transferred along the guide groove via a loading mechanism, and the magnetic tape of the tape cassette is unloaded. In a magnetic recording / reproducing apparatus in which a tape is loaded from a loading position to a loading position to be mounted around a rotary cylinder, the guide groove further includes
In the direction opposite to the loading direction.
It is formed by extending along substantially the same track as the trace, and this extension
A notch for incorporating and accommodating the tape pull-out member in the guide groove at a predetermined position of the place is provided, and positioning of the tape pull-out member at an unloading position is performed by the loading mechanism. Recording and playback device. 2. A tape pull-out member is moved to a guide groove on a metal plate.
The tape pull-out member is loaded movably
The tape is transported along the guide groove via the
Rotate the magnetic tape from the unloading position
Tape at the loading position to be mounted around the
In the magnetic recording / reproducing apparatus, the guide groove crosses the metal plate, and the metal plate crosses the surface of the metal plate.
Without any deformation in the direction
Extending from the loading position in the direction opposite to the loading direction.
The tape pull-out part is provided at a predetermined position of the extension part.
A notch for incorporating and housing the material in the guide groove,
Position of the tape pull-out member at the unloading position
The decision is made by the loading mechanism.
Magnetic recording and reproducing apparatus. 3. A tape pull-out member is moved to a guide groove on a metal plate.
The tape pull-out member is loaded movably
The tape is transported along the guide groove via the
Rotate the magnetic tape from the unloading position
Tape at the loading position to be mounted around the
In the magnetic recording / reproducing apparatus, the guide groove is closed in the surface of the metal plate.
Without being released to the end of the metal plate, and
Extending from the loading position in the loading direction opposite to the direction
The tape is drawn at a predetermined position of the extension.
A notch for accommodating the projecting member in the guide groove is provided.
At the unloading position of the tape pull-out member.
Positioning by the loading mechanism
A magnetic recording / reproducing apparatus characterized by the above-mentioned. 4. A tape pulling member is moved to a guide groove on a metal plate.
The tape pull-out member is loaded movably
The tape is transported along the guide groove via the
Rotate the magnetic tape from the unloading position
Tape at the loading position to be mounted around the
In the magnetic recording / reproducing apparatus, the tape pull-out member extends over the guide groove in the width direction.
So that the wide part extending to correspond to both sides of the metal plate
What is accommodated in the guide groove, wherein the guide groove,
The direction opposite to the loading direction from the unloading position
It is formed by extending in the direction of
Wide width corresponding to the back surface of the metal plate of the tape pull-out member
The part can pass in the direction that intersects the surface of the metal plate,
Notch to allow the tape pull-out member to be incorporated into the guide groove
Tape pull-out portion provided in the guide groove
The positioning at the unloading position of the material
Magnetic recording characterized by being performed by a recording mechanism
Playback device.