JP3180479B2 - Recording or playback 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 recording or reproducing apparatus, and more particularly to a structure of a magnetic head mounting portion.

[0002]

2. Description of the Related Art First, a configuration of a cassette player as an example of a recording or reproducing apparatus will be described with reference to FIG. What is illustrated here is a portable small cassette player having a so-called auto-reverse function.
Denotes a cassette player as a whole, 2 denotes a cassette player main body, and 3 denotes a lid for opening and closing the cassette mounting portion 4 of the cassette player main body 2.

[0003] The lid 3 is attached to the cassette player main body 2.
Is fixed integrally to a cassette holder 5 pivotally supported on the side of the cassette mounting portion 4 so as to be able to be raised and lowered with respect to the cassette mounting portion 4. When the tape cassette is mounted on the cassette mounting portion 4 of the cassette player body 2, the The tape cassette is inserted into the cassette mounting section 4 by inserting the tape cassette between the left and right holding sections 5a and 5b of the cassette holder 5 so as to be along the inner side of the cassette holder 5 and closing the lid 3 in this state. It has become so.

When the lid 3 is closed, the locking claw 6 provided on the cassette player main body 2 is engaged with the engaging portion 7 of the lid 3 so that the lid 3 is not opened. To be locked. Reference numeral 8 denotes a release button for releasing the lock.

A pair of hub shafts, ie, a take-up hub shaft 9 and a supply hub shaft 10, which are engaged with a hub of the tape cassette, project from a cassette mounting portion 4 of the cassette player main body 2. A capstan 11 for running is projected. The cassette player of this embodiment is a so-called single capstan type auto-reverse machine, that is, the normal running (forward play, hereinafter referred to as FWD) of the tape by rotating one capstan 11 in both forward and reverse directions. It is a mechanism that performs reverse running (reverse play, hereinafter referred to as REV).

Reference numeral 12 denotes a pinch roller which is pressed against the capstan 11, and reference numerals 13 and 14 denote magnetic heads (in this embodiment, for reproduction only).
The other magnetic head 14 is for WD, and the other magnetic head 14 is for REV. Both the pinch roller 12 and the magnetic heads 13 and 14 are mounted on a cassette holder 5 integrated with the lid 3, that is, at the same time as the tape cassette is inserted into the cassette holder 5, the pinch roller 12, the magnetic head 13 and 14 is inserted into the front opening of the tape cassette so as to correspond to the magnetic tape.

When the magnetic tape runs, the magnetic head 1
Either 3 or 14 is in sliding contact with the magnetic tape, ie, FW
At the time of D, one magnetic head 13 is projected and comes into contact with the magnetic tape, and one side (A surface) is reproduced. At the time of REV, the other magnetic head 14 is projected and comes into contact with the magnetic tape.
Reproduction of the other side (B side) is performed.

In such a cassette player 1, when the magnetic tape is running, the magnetic heads 13, 1
So that 4 is defined at the exact height with respect to the magnetic tape,
With the tape cassette mounted, the magnetic heads 13, 1
It is necessary to perform positioning in the height direction of No. 4. When the magnetic heads 13 and 14 are not used, they need to be retracted in a direction away from the magnetic tape. Therefore, a member for constantly applying a return force to the magnetic tape 13 in a direction of retracting the magnetic tape is required. It is.

A spring member is used for both positioning of the magnetic head in the height direction and application of a return force. Conventionally, separate dedicated springs are used for positioning and return of the magnetic head. Was used.

[0010]

As described above, in the prior art, the mounting portion of the magnetic head is provided with separate spring members for positioning and returning, respectively, so that the number of parts is large and the configuration is complicated. As a result, the assembling also requires a lot of man-hours, resulting in a problem that the cost increases. The present invention has been made to solve such a problem.

In order to achieve the above object, a recording or reproducing apparatus according to the present invention is provided on a main body of the apparatus so as to be rotatable, and has a cover for opening and closing a tape cassette mounting portion, and a recording or reproducing apparatus for recording or reproducing data on or from a magnetic tape of the tape cassette. A magnetic head for reproducing,
A lever is provided on the lid side, supports the magnetic head, and is provided on a lever rotatably supported in a direction in which the magnetic head advances and retreats with respect to the magnetic tape, and on a shaft supporting portion for supporting the lever. A compression coil spring portion that urges the lever in one of the directions to position the lever in the axial direction, and a torsion coil spring portion that is engaged with the lever and urges the lever in a direction to retract with respect to the magnetic tape. A compression coil spring portion and a torsion coil spring portion are constituted by one spring member, and furthermore, when the lid is closed, a lever faces the spring member via the lever, and a part of the device body. By pressing against the surface by the urging force of the compression coil spring portion, the lever is positioned in the axial direction.

[0012]

The recording / reproducing apparatus of the present invention configured as described above has a structure in which the positioning of the lever, that is, the magnetic head, and the application of the return force are performed by one spring member, so that the number of parts is small, and The number of assembling steps can be reduced accordingly, which is effective in reducing costs.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. The embodiment shown in FIGS. 2 to 5 is applied to the magnetic head mounting portion of the cassette player 1 shown in FIG. 1. In this magnetic head mounting portion, first, the cassette holder 5 integrated with the lid 3 is mounted. A support shaft 20 is erected on the central plate portion 5c, and a pair of levers 21 and 22 are rotatably supported on the support shaft 20 in a direction in which the levers 21 and 22 move forward and backward with respect to the tape cassette. That is, this lever 21,
A cylindrical portion 21a, 22a is integrally formed at one end of each of the levers 22. The cylindrical portion 21a of one lever 21 is rotatably fitted to and combined with the cylindrical portion 22a of the other lever 22. This is fitted to the support shaft 20 and the support shaft 20
A retaining ring 23 is fitted and attached to the groove 20a at the tip of the head. In this structure, levers 21 and 2
Numeral 2 is attached with some margin so as to be slightly movable in the lateral direction of the support shaft 20.

Magnetic heads 13 and 14 are supported on the pair of levers 21 and 22, respectively, and tape guides 24 and 25 are provided on both sides of the magnetic heads 13 and 14, respectively. Guide protrusions 24a and 24
b, 25a and 25b are passed through a magnetic tape so as to be accurately guided to the magnetic heads 13 and 14.

A spring member 26 is mounted on the shaft support of the levers 21 and 22 on which the magnetic heads 13 and 14 are supported.
Reference numeral 2 denotes a structure in which the positioning of the tape cassette with respect to the magnetic tape in the height direction is performed, and a returning force in the retreating direction is applied to the magnetic tape of the tape cassette.

The spring member 26 includes a compression coil spring for positioning the levers 21 and 22 with respect to the magnetic tape, and a lever 21 and 22 for retracting with respect to the magnetic tape.
And a torsion coil spring portion for biasing the spring. That is, the spring member 26 is
And arm portions 26b on both sides continuous with the coil portion 26a,
26c, the support shaft 20 in the coil portion 26a.
(The cylindrical portion 22a of the lever 22) is fitted in a compression manner, and the terminal of one arm 26b is engaged with the locking piece 21b protruding from the one lever 21, and the other is engaged. Arm 2
6c is a locking piece 2 protruding from the other lever 22 at the terminal portion.
2b, whereby the levers 21 and 22 are always rotated in the returning direction, that is, the magnetic heads 13 and 14 are rotated.
Imparts a pulling force in a direction away from the magnetic tape. At the same time, the coil part 2 mounted in a compressed state
By the restoring force of 6a, the levers 21 and 22 are biased downward along the axial direction of the support shaft 20, that is, in a direction pressed against the retaining ring 23 attached to the tip of the support shaft 20.

When the lid 3 is completely closed and locked with respect to the cassette player main body 2, the legs 21 projecting below the free ends of the respective levers 21 and 22 are formed.
c, 22c are the chassis 2a of the cassette player body 2
(FIG. 3). At this time, the levers 21 and 22 are slightly pushed up against the force of the coil portion 26a of the spring member 26, that is, the levers 21 and 22 are moved by the force of the coil portion 26a of the spring member 26. The levers 21 and 22, ie, the magnetic head 1, are pressed against the chassis 2 a.
The positioning of the magnetic heads 13 and 14 in the height direction is performed, and the magnetic heads 13 and 14 correspond to the correct height with respect to the magnetic tape of the tape cassette.

When the FWD and REV operations are performed with the magnetic heads 13 and 14 positioned as described above, the magnetic head 1 corresponding to the operation mode is operated by a magnetic head moving mechanism configured in the cassette player main body 2.
3 or 14 protrudes and comes into sliding contact with the magnetic tape.

Although the detailed illustration of the magnetic head moving mechanism is omitted, a horizontal direction, that is, a rotating direction of the levers 21 and 22 (the magnetic heads 13 and 14) is provided inside the cassette player main body 2.
The sliding plate 27 is slidably disposed in a direction perpendicular to the direction of movement of the chassis 2a. A pair of pressing pins 28 and 29 are erected on the sliding plate 27, projecting toward the upper surface of the chassis 2a, and levers 21 and 22, respectively. Is adapted to the rear edge. The rear edges of the levers 21 and 22 to which the pressing pins 28 and 29 correspond are inclined cam edges 21d and 21d, respectively.
22d, and the inclined cam edges 21d, 22d
Are pressed by the pressing pins 28 and 29, the levers 21 and 22 are rotated about the support shaft 20, and the magnetic heads 13 and 14 are moved.

That is, at the time of FWD, the slide plate 27 is slid rightward in FIG.
The lever 21 is rotated forward against the force of the spring member 26, that is, the magnetic head 13 is protruded and comes into contact with the magnetic tape, and the one side (A) Is reproduced (see FIG. 4).
At this time, the pressing pin 29 is located at a position away from the lever 22, so that the lever 22 is held at the retracted position (return position) by the force of the spring member 26, that is, the magnetic head 14 is pulled away from the magnetic tape. It is in the state of being crowded.

At the time of REV, the slide plate 27 is slid leftward in the drawing, and the pressing pin 29 abuts against the inclined cam edge 22d of the lever 22 and presses it. The magnetic head 14 is rotated forward against the force of 26, that is, the magnetic head 14 is protruded and comes into contact with the magnetic tape, and the reproduction on the other side (B side) is performed (see FIG. 5). At this time, the pressing pin 28 is
, And the lever 21 is held at the retracted position (return position) by the force of the spring member 26, that is, the magnetic head 13 is retracted away from the magnetic tape.

As described above, the structure of the magnetic head mounting portion of the cassette player of the present embodiment is a structure in which the positioning of the magnetic heads 13 and 14 and the application of the return force are performed by one spring member 26. As described above, the number of parts is reduced as compared to a configuration having separate dedicated springs for positioning and returning the magnetic head, and the number of assembly steps is reduced accordingly, so that the whole can be manufactured at low cost. It is.

While the embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the configuration shown in this embodiment, but can adopt various embodiments.

[0024]

As described above, the recording / reproducing apparatus of the present invention has a structure in which the spring members separately provided for positioning and returning the magnetic head have been unified. In addition, the configuration is simpler and the number of parts is reduced as compared with the related art, and the number of assembling steps can be reduced accordingly, leading to cost reduction and greatly contributing to realization of an inexpensive apparatus.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cassette player (with a lid open).

FIG. 2 is an exploded perspective view of a magnetic head mounting portion according to the embodiment.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of the same, showing a state during FWD.

FIG. 5 is a plan view of the same, showing a state at the time of REV.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette player 2 Cassette player main body 3 Lid 13,14 Magnetic head 21,22 Lever 26 Spring member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 57-122051 (JP, U) Japanese Utility Model 2-1694 (JP, Y2) (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 5/54

Claims (1)

(57) [Claims] A cover which is rotatably provided in the main body of the apparatus and opens and closes a tape cassette mounting portion; a magnetic head which records or reproduces data on and from a magnetic tape of the tape cassette; A lever that supports the magnetic head and is rotatably supported in a direction in which the magnetic head advances and retreats with respect to the magnetic tape; and a shaft supporting portion that supports the lever. A compression coil spring portion for biasing the lever to position the lever in the axial direction; and a torsion coil spring engaged with the lever and biasing the lever in a direction to retract with respect to the magnetic tape. The compression coil spring portion and the torsion coil spring portion are configured by one spring member, and further, when the lid is closed, the lever operates the lever. The lever is positioned in the axial direction by being pressed against a partial surface of the apparatus body facing the spring member by the urging force of the compression coil spring portion. Or a playback device.