JPH06215525A - Pad device of tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] As a pad device for a DCC (Digital Compact Cassette), it aims to reduce the cost by reducing the number of parts, to facilitate the workability of assembling, and to stabilize the recording and reproduction by the proper tension of the magnetic tape. . [Structure] Based on one spring material 31, a pair of left and right leaf spring portions 31a, 31a are extended from a central wide portion, and upper and lower portions of the central wide portion are not provided with reinforcing bent portions 31c, 31c, and a part thereof Is bent to form the pad spring portions 31d and 31d, and is further bent to form the pad fixing portions 31e and 31e. The pad fixing portions 31e and 31e are joined to the pad member 32.
Glue. The left and right wide base portions 31f and 31f are left and cut and bent to be bent to form a pair of left and right semi-cylindrical azimuth lock pins 31g and 31g integrally. The pair of azimuth lock pins 31g, 31g are symmetrically positioned on both sides of the pad member 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad device having a pad member and a pair of azimuth lock pins, which is used in a tape cassette such as a DCC (digital compact cassette).

[0002]

2. Description of the Related Art In a DCC (digital compact cassette) pad device, a pair of azimuth lock pins (ALP) on both sides of the pad member are provided in addition to a pad member made of an elastic material such as felt.
The pair of left and right azimuth lock pins are provided for stabilizing the contact of the magnetic tape with the magnetic head and for suppressing the fluctuation of azimuth. Further, the pad member and the azimuth lock pin are elastically retracted in accordance with the protrusion of the magnetic head, and a plate-shaped spring for elastically pressing the pad member and the azimuth lock pin against the magnetic head by the reaction force thereof is provided. There is.

A detailed description will be given below with reference to the drawings. FIG. 3 is a perspective view showing the pad component A, FIG. 4 is a perspective view showing a bending type lock pin component B _1, and FIG. 5 is a perspective view showing a fitting type (insert type) lock pin component B ₂ . The tape cassette pad device is configured by a combination of the pad component A of FIG. 3 and the lock pin component B ₁ of FIG. 4, or the pad component A of FIG. 3 and the lock pin component B _{2 of} FIG. Composed of combinations.

A pad component A shown in FIG. 3 is composed of a pad member 1 such as felt and a pad spring 2 that adheres the pad member 1 and elastically holds it. The pad spring 2 includes a wide portion 2a at the central portion for adhering the pad member 1, a pair of leaf spring portions 2b and 2b extending from the wide portion 2a to both sides, and the leaf spring portions 2b and 2b.
A pair of hooks 2 in which the ends of b are bent to the back side at a substantially right angle
c, 2c. The left and right hook portions 2c, 2c are hooked and positioned by fixing pins in a tape cassette (not shown).

The bending type lock pin part B ₁ shown in FIG. 4 is manufactured by punching out a single metal plate having a spring property, bending it, and partially cutting and raising it. In the flat punching material, a pair of leaf spring portions 3a, 3a are formed by extending from the wide portion of the central portion to both left and right sides,
The end portions of the leaf spring portions 3a, 3a are bent to the back side at a substantially right angle to form a pair of hook portions 3b, 3b. The left and right hook portions 3b, 3b are hooked and positioned by fixing pins in a tape cassette (not shown).
In the wide part of the central part, both upper and lower sides are bent to the back side at a substantially right angle to form a pair of reinforcing bent parts 3c, 3c, and cut on the front side while leaving the vertically wide base parts 3d, 3d on both left and right sides. After being raised, it is bent outward in the left-right direction to form a pair of left and right azimuth lock pins 3e,
3e is integrally formed. The remaining portion where the pair of azimuth lock pins 3e, 3e is cut and raised is an opening 3f for inserting the pad member 1 in the pad component A.

The fitting type lock pin component B ₂ shown in FIG. 5 is a azimuth lock pin spring 4 formed by punching and bending a single metal plate having a spring property.
The azimuth lock pin spring 4 is formed by a combination with a pair of azimuth lock pins 5 and 5 which are press-fitted into the azimuth lock pin spring 4. The azimuth lock pin spring 4 extends from the wide portion of the central portion of the flat punching material to the left and right sides to form a pair of leaf spring portions 4a, 4a.
In addition to forming a, the end portions of the leaf spring portions 4a, 4a are bent to the back side at a substantially right angle to form a pair of hook portions 4b, 4b. The left and right hooking portions 4b, 4b are hooked and positioned by fixing pins in a tape cassette (not shown). In the wide part of the central part, both upper and lower sides are bent to the back side at a substantially right angle to form a pair of reinforcing bent parts 4c, 4c, and the rest is cut out while leaving vertically long wide base parts 4d, 4d. To form an opening 4e. Notches 4f, 4f ... Are formed in a pair of upper and lower reinforcing bent portions 4c, 4c so as to be adjacent to the left and right wide base portions 4d, 4d, respectively.
A pair of azimuth lock pins 5 and 5 are press-fitted and fixed to f, 4f. The pad member 1 of the pad component A is inserted into the opening 4e.

The pad member 1 of the pad part A shown in FIG. 3 is shown in FIG.
When inserted into the opening 3f of the lock pin part B ₁ , the leaf spring portions 2b, 2b and the leaf spring portions 3a, 3a become substantially parallel to each other, and a pair of azimuth lock pins 3e, The pad device for the DCC (digital compact cassette) has a form in which 3e is present.

Further, the pad member 1 of the pad component A shown in FIG.
5 is inserted into the opening 4e of the lock pin part B ₂ shown in FIG. 5, the leaf spring portions 2b, 2b and the leaf spring portions 4a, 4a become substantially parallel to each other, and a pair of azimuth locks are provided on both left and right sides of the pad member 1. The pad device for a digital compact cassette has the pins 5 and 5.

Although these two types of pad devices differ in specific structure and shape, they are almost the same in terms of morphology and function. Therefore, the relationship with the magnetic head will be described with reference to FIG. 6 in the form common to both types.

The pad component A ₃ has a structure in which the pad member 11 is bonded to the central portion of the pad spring 12. The lock pin part B ₃ has an opening 13a formed at the center of the azimuth lock pin spring 13 and a pair of azimuth lock pins 14, 1 on both left and right sides of the opening 13a.
4 is provided. And the pad device is
The pad member 11 is inserted into the opening 13a.
The pad spring 12 and the azimuth lock pin spring 13 are parallel to each other, and the azimuth lock pins 14 and 14 are located on both left and right sides of the pad member 11. The pad device thus assembled is mounted on a DCC (digital compact cassette) not shown together with the magnetic tape 15. Both ends of the pad spring 12 are fixed pins 16 and 16 on the left and right.
The both ends of the azimuth lock pin spring 13 are hooked by the left and right fixing pins 17, 17 and are respectively positioned.

On the other hand, the head unit C is built in the DCC recorder and is operated so as to approach and separate from the pad device of the DCC. The head unit C is
The structure is roughly as follows. Head unit front part 2
A magnetic head 22 is fixed at 1. The fixed state is such that the magnetic head 22 slightly projects from the front end of the head unit front portion 21. The front end of the head unit front portion 21 serves as a pin support 21a that presses the magnetic tape 15 between the azimuth lock pins 14 and 14 in the protruding posture. This pressure contact ensures good contact of the magnetic tape 15 with the magnetic head 22. Further, when the head unit front portion 21 is in the projecting posture, the magnetic head 22 pushes the magnetic tape 15 slightly to the back side, and the tip end of the magnetic head 22 is the pad member 11.
The magnetic tape 15 is pressure-welded between the and.

This is due to the protrusion of the head unit C.
The magnetic head 22 presses the magnetic tape 15 and presses the pad member 11 against the pad spring 12, and the reaction force of the elastically displaced pad spring 12 causes the magnetic tape 15 to move between the pad member 11 and the magnetic head 22. As the head unit C protrudes, the pin support 2 resists the azimuth lock pin spring 13
1a presses the azimuth lock pins 14 and 14, and the reaction force of the azimuth lock pin spring 13 elastically displaced causes the azimuth lock pins 14 and 14 and the pin support 21.
This is because the magnetic tape 15 is pressed against the a.

F is provided on each of the left and right sides of the movable block 21.
Tape guides 23, 23 called ATG (fixed azimuth tape guide) are integrally formed. The structure of each tape guide 23 is shown in the side view of FIG.
A pair of flanges 23a and 23b are formed on both sides of the running path of the magnetic tape 15, and the inner surface of the upper flange 23a is formed into a flat tape running reference surface 23c, while the inner flange portion of the inner surface of the lower flange 23b is formed. Is a tapered surface 23
It is formed in d. A vertical portion sandwiched between the tape running reference surface 23c and the taper surface 23d is a curved surface 23e that smoothly guides the tape surface of the magnetic tape 15.

The azimuth lock pin 14 has a pin support 2
The magnetic tape 15 is wound around the azimuth lock pin 14 by being pressed by 1a, and at the portion of the tape guide 23, the magnetic tape 15 closely adheres to the curved surface 23e, and the lower end edge of the magnetic tape 15 in the width direction is upward from the tapered surface 23d. The upper end edge of the magnetic tape 15 in the width direction is constantly pressed against the tape running reference surface 23c by receiving the component force of. This makes it possible to minimize the deviation between the track and azimuth.

[0015]

In the conventional tape cassette pad device constructed as described above, the pad component A ₃ and the lock pin component B ₃ are constructed separately, and these pad components are formed. A ₃ and the lock pin component B ₃ were assembled in a state in which the pad member 11 was inserted into the opening 13a and then assembled in the tape cassette.

However, since the pad part A ₃ and the lock pin part B ₃ are separated and must be manufactured individually, the manufacturing cost becomes high.
There are two springs, a pad spring 12 and an azimuth lock pin spring 13, which also causes a cost increase. Since the pad component A ₃ and the lock pin component B ₃ are assembled and both components must be assembled in the tape cassette while maintaining the assembled state, the assembling work is difficult and troublesome, and the assembly cost is long. Was causing the up.

The present invention was devised in view of such circumstances, and it is an object of the present invention to provide a tape cassette pad device capable of reducing costs, facilitating assembling work, and stabilizing recording and reproduction. To aim.

[0018]

A tape cassette pad device according to the present invention is made of a single plate material having a spring property, and a pair of plate spring parts are extended from a wide part in a central part to both left and right sides. A pad fixing portion is formed in the wide portion, a pair of azimuth lock pins are provided on both left and right sides of the pad fixing portion, and a pad member is joined to the pad fixing portion.

[0019]

Since the pad member and the pair of azimuth lock pins on both sides of the pad member are provided in the common wide portion, and the pair of left and right common leaf spring portions are extended from the wide portion, the pad component and the lock pin component are separated from each other. Compared to the conventional example that was divided into
In particular, the spring for the pad member and the spring for the azimuth lock pin are combined so that the number of parts becomes one,
Therefore, the manufacturing cost and the assembling cost can be reduced. Since it is a single item, the workability of assembling it in the tape cassette is also simplified.

[0020]

Embodiments of a tape cassette pad device (DCC pad device) according to the present invention will now be described in detail with reference to the drawings.

First Embodiment FIG. 1 is a perspective view showing the appearance of a DCC (digital compact cassette) pad device according to the first embodiment. The first embodiment is a DCC pad device in which two parts, a spring material and a pad member, are assembled. That is, the azimuth lock pin is a bent type. A spring material having a thickness of about 0.1 mm is used as one plate having spring properties.

One spring material 31 is punched, bent and cut and raised to manufacture.

A pair of leaf spring parts 31a, 3 are formed by extending from the wide part of the central part of the flat punching material to both left and right sides.
1a, and each leaf spring portion 31a, 31a
Bend the ends of the to the back side at a substantially right angle, and
b and 31b. Left and right hooks 31b, 31b
Is locked by a fixing pin in a tape cassette (not shown) and positioned. In the wide part of the central part, the upper and lower sides are bent at a substantially right angle to the back side to form a pair of reinforcing bending parts 31c, 31c, and the middle part in the longitudinal direction of each reinforcing bending part 31c, 31c is cut and raised inward. Bend to the front side and pad spring portions 31d, 31
d, and the pad spring portions 31d, 31
The end portion of d is bent at a substantially right angle to form a pair of upper and lower pad fixing portions 31e, 31e. Pad fixing part 31
e and 31e are located on the parallel surfaces of the pair of leaf spring portions 31a and 31a.

In the wide portion of the central portion, the vertically wide bases 31f, 31f are left and cut on the left and right sides and cut and raised on the front side, and then curved outward in the left-right direction so as to cover the wide bases 31f, 31f. A pair of left and right azimuth lock pins (ALP) 31g, 31g having a substantially semi-cylindrical shape are integrally formed by bending. A rectangular parallelepiped pad member 32 such as felt is bonded to the front surfaces of the pair of upper and lower pad fixing portions 31e, 31e with an adhesive. The pair of azimuth lock pins 31g, 31g are symmetrically positioned on the left and right sides of the pad member 32. In addition,
The pad device as a whole has a symmetrical shape.

The pair of leaf spring portions 31a, 31a are composed of a spring for the pad member 32 and a pair of azimuth lock pins 3.
It also serves as a spring for 1g and 31g. This point is a great difference from the pad device in which the pad component A of FIG. 3 and the lock pin component B ₁ of FIG. 4 are combined.
In addition, since the number of parts is reduced by also using the springs, the manufacturing and assembling costs are reduced, and since it is a single piece, the assembling work into the tape cassette is also simplified.

Second Embodiment FIG. 2 is a perspective view showing the external appearance of a DCC (digital compact cassette) pad device according to a second embodiment. The second embodiment is a DCC pad device in which a spring material, a pad member and a pair of azimuth lock pins are assembled. That is, the azimuth lock pin is a fitting type. A spring material having a thickness of about 0.1 mm is used as one plate having spring properties.

A piece of spring material 41 is punched, bent and cut and raised to manufacture.

A pair of leaf spring portions 41a, 4a extending from the wide portion of the central portion of the flat punching material to both left and right sides.
1a, and each leaf spring portion 41a, 41a
Bend the ends of each of them to the back side at a substantially right angle, and
b and 41b. Left and right hooks 41b, 41b
Is locked by a fixing pin in a tape cassette (not shown) and positioned. In the wide portion of the central portion, both upper and lower sides thereof are bent substantially at right angles to the back side to form a pair of reinforcing bending portions 41c, 41c. Further, in the wide portion of the central portion, pad spring portions 41e and 41e are formed by bending and bending in a semi-cylindrical shape by cutting and bending to the back side while leaving the vertically wide base portions 41d and 41d on both left and right sides. The end portions of the portions 41e, 41e are bent at substantially right angles to form a pair of pad fixing portions 41f, 4e.
1f is formed. The pad fixing portions 41f and 41f are
It is located on the extension surface of the pair of leaf spring portions 41a, 41a. Then, the pair of upper and lower pad fixing portions 41f, 41
A rectangular parallelepiped pad member 42 such as felt is bonded to the front surface of f with an adhesive.

Notches 41g, 41g ... Are formed in a pair of upper and lower reinforcing bent portions 41c, 41c so as to be adjacent to the left and right wide base portions 41d, 41d on both sides of the pad member 42, and the notches 41g, 41g. A pair of azimuth lock pins (ALP) 43, 43 are press-fitted and fixed to 41g. The pair of azimuth lock pins 43, 43 are symmetrically positioned on the left and right sides of the pad member 42. In addition,
The pad device as a whole has a symmetrical shape.

The second embodiment is different from the first embodiment in that the azimuth lock pins 43, 43 are separately formed and are fitted therein. However, it is functionally similar to the first embodiment. That is, the pair of leaf spring portions 41a, 41a also serve as the spring for the pad member 42 and the spring for the pair of azimuth lock pins 43, 43. In this respect, the pad component A of FIG. The pad device is greatly different from the pad device in which the lock pin part B ₂ is combined. Cost reduction, easy workability in assembling, and stable recording / reproducing are achieved.

[0031]

As described above, according to the present invention, the spring for the pad member and the spring for the azimuth lock pin are combined, and the combined spring includes the pad member and the pair of azimuth lock pins on both sides thereof. Since it is attached, the manufacturing cost and the assembling cost can be reduced by reducing the number of parts, and since it is a single item, it is easy to handle and the workability of assembling it into the tape cassette can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a tape cassette pad device (DCC pad device) according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the external appearance of a tape cassette pad device (DCC pad device) according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a pad component in a conventional example.

FIG. 4 is a perspective view showing a bending type lock pin component in a conventional example.

FIG. 5 is a perspective view showing a fitting type lock pin component in a conventional example.

FIG. 6 is a schematic plan view showing a relationship with a magnetic head in a form common to both the bending type and the fitting type.

FIG. 7 is a side view showing the structure of the tape guide.

[Explanation of symbols]

31 ... Spring material, 31a ... Leaf spring part, 31b ...
Hooking portion, 31c ... Reinforcing bent portion, 31d ... Pad spring portion, 31e ... Pad fixing portion, 31f ... Wide base portion,
31g ... Azimuth lock pin (ALP), 32 ... Pad member, 41 ... Spring material, 41a ... Leaf spring part,
41b ... Latching portion, 41c ... Reinforcing bent portion, 41d ...
Wide base portion, 41e ... Pad spring portion, 41f ... Pad fixing portion, 41g ... Notch, 42 ... Pad member, 4
3 ... Azimuth lock pin

Claims (1)

[Claims] 1. A pad material having a spring property is used as a material, and a pair of leaf spring portions are extended from the wide portion of the central portion to both left and right sides, and a pad fixing portion is formed in the wide portion, and the pad is formed. A pad device for a tape cassette, characterized in that a pair of azimuth lock pins are provided on both left and right sides of the fixing portion, and a pad member is joined to the pad fixing portion.