JPH073475Y2 - Magnetic recording / reproducing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention uses a tape guide to guide a magnetic tape drawn from a cassette positioned by a reference pin into contact with a magnetic head, and records information with the magnetic head. The present invention relates to a magnetic recording / reproducing device for reproducing, for example, a digital audio tape recorder.

[Conventional technology]

Conventionally, a magnetic recording / reproducing apparatus is provided with a reference pin for positioning the loaded cassette, a tape guide for pulling out the magnetic tape from the positioned cassette, and guiding the magnetic tape so that the magnetic head is brought into contact with a predetermined position of the magnetic tape. Has been.

2 is a plan view for explaining the magnetic recording / reproducing apparatus, FIG. 3 is a sectional view showing a reference pin and a tape guide of the conventional magnetic recording / reproducing apparatus, and FIG. 4 is a reference pin of the conventional magnetic recording / reproducing apparatus. FIG. 6 is a cross-sectional view for explaining the operation of the tape guide.

In FIG. 2, C denotes a cassette, which accommodates a supply hub H _S and a take-up hub H _T for feeding the magnetic tape T and winding the fed magnetic tape T.
Reference holes h ₁ and h ₂ are provided.

Reference numeral 1 denotes a base, 2 denotes a first reference pin having one end attached to the base 1, and the other end has a convex portion 2a fitted into the _first reference hole h ₁ of the cassette C and a cassette. A step portion 2b for positioning C at a predetermined height from the base 1 is provided.

Reference numeral 3 indicates a first tape guide attached to the base 1 near the first reference pin 2, one end of which is attached to the base 1 and the other end of which is provided with a male screw portion 3a ₁ . Axis 3a
A coil spring 3b through which the shaft 3a is inserted, a tape guide portion 3c through which the shaft 3a is inserted, and a female screw portion 3d that is screwed into the male screw portion 3a _1. By moving, the coil spring 3b expands and contracts, the tape guide portion 3c moves up and down, and the magnetic tape T fed from the supply hub H _S of the cassette C is moved.
And the position in the width direction of the magnetic tape T wound around the supply hub H _S.

Incidentally, the tape guide portion 3c includes a lower guide flange 3c ₁ to position regulating the lower end of the magnetic tape T, the sleeve 3c ₂ approximately the same length as the width of the magnetic tape T, on which the position regulating the upper end of the magnetic tape T It is composed of a guide flange 3c _3.

Reference numeral 4 denotes a second tape guide, 5 denotes a third tape guide, and the second and third tape guides 4 and 5 are the first tape guide rotatably attached to the base 1 (not shown). When the magnetic tape T is attached to the arm and the magnetic tape T is threaded, the first arm rotates to the state shown in FIG.

Reference numeral 6 denotes a rotary drum attached to the base 1, on which the magnetic tape T is brought into contact to record information,
A magnetic head for reproducing is provided.

Reference numeral 7 indicates a fourth tape guide, 8 indicates a fifth tape guide, and the fourth and fifth tape guides 7 and 8 are the second tape guides rotatably attached to a base 1 (not shown). It is attached to the arm, and when the magnetic tape T is threaded, the second arm rotates to the state shown in FIG.

Reference numeral 9 indicates a capstan attached to the base 1, 10 indicates a pinch roller that is pressed against the capstan 9, and the pinch roller 10 holds the magnetic tape T between the capstan 9 and
The drive force of the capstan 9 causes the magnetic tape T to run.

Reference numeral 11 indicates a sixth tape guide, which includes a pinch roller 10 and a sixth tape guide.
The tape guide 11 is attached to a pinch arm that is rotatably attached to the base 1 (not shown), and when the magnetic tape T is threaded, the pinch arm rotates to the state shown in FIG. .

Reference numeral 12 denotes a seventh tape guide attached to the base 1, one end of which is attached to the base 1 and the other end of which is a shaft 12a provided with a male screw portion 12a ₁ and the shaft 12a. Coil spring 12b and tape guide part through which the shaft 12a is inserted
12c and a female screw portion 12d that is screwed to the male screw portion 12a _1. By rotating the female screw portion 12d, the coil spring 12b is formed.
Expands and contracts, the tape guide part 12c moves up and down, and cassette C
Magnetic tape T and the winding hub H _T for winding a winding hub H _T of
The position in the width direction of the magnetic tape T that is fed from is regulated.

Incidentally, the tape guide portion 12c includes a lower guide flange 12c ₁ to the position regulating the lower end of the magnetic tape T, the sleeve 12c ₂ substantially the same length as the width of the magnetic tape T, on which the position regulating the upper end of the magnetic tape T It is composed of a guide flange 12c _3.

Reference numeral 13 denotes a second reference pin, one end of which is attached to the base 1 near the seventh tape guide 12, and the other end of which is a convex portion that fits into the _second reference hole h ₂ of the cassette C. 13a and a step 13 for positioning the cassette C at a predetermined height from the base 1.
b and are provided.

Next, the operation will be described.

First, when the cassette C is inserted into the magnetic recording / reproducing apparatus and loaded, the convex portions 2a and 13a of the first and second reference pins 2 and 13 are formed.
Is fitted into the first and second reference holes h ₁ and h ₂ of the cassette C, and the lower surface of the cassette C abuts the stepped portions 2b and 13b.
Is positioned at a predetermined height from the base 1 by the first and second reference pins 2 and 13, and is also positioned horizontally.

When the cassette C is positioned in this manner, the cassette C is biased toward the base 1 by a biasing member (not shown).

When the first and second arms and the pinch arm (not shown) are rotated by the drive mechanism while the cassette C is loaded as described above, the tape guides 4,5, 7, 8, 11 and the pinch rollers are rotated. Since 10 is located in the state shown in FIG. 2, the magnetic tape T can be threaded.

Then, by rotating the capstan 9, it is possible to wind the magnetic tape T from the supply hub H _S to the winding hub H _T, or from the winding hub H _T to the supply hub H _S.

While the magnetic tape T is running in this way, the magnetic tape T
The tape path of the magnetic tape T is adjusted to accurately record information on the magnetic tape T by the magnetic head of the rotating drum 6, and
In order to reproduce information from the tape accurately, when the female screw portions 3d, 12d of the first and seventh tape guides 3, 12 are rotated, the coil spring
As the tape guide portions 3c and 12c move up and down as the tapes 3b and 12b expand and contract, the tape path of the magnetic tape T can be adjusted.

[Problems to be solved by the device]

Since the conventional magnetic recording / reproducing apparatus is configured as described above, it is necessary to adjust the tape path of the magnetic tape T using the first and second methods.
When the seventh tape guides 3 and 12 are adjusted, the position of the cassette C does not change, but the position of the magnetic tape T changes in the width direction.

Therefore, when the tape path of the magnetic tape T is adjusted by lowering the tape guide portions 3c and 12c of the first and seventh tape guides 3 and 12, as shown in FIG. Adjustable, but cassette C and magnetic tape T
Since the relative position of the cassette C changes, the supply hub H _{S of the} cassette C
Alternatively, the magnetic tape T wound on the winding hub H _T may be wound randomly or may be wound in one direction.

Then, in an extreme case, the load torque of the supply hub H _S or the take-up hub H _T increases and the magnetic tape T cannot be taken up.

Also, the upper guide flanges 3c ₃ , 12 of the tape guides 3c, 12c
Since the magnetic tape T curls at c ₃ , there is a disadvantage that the upper edge of the magnetic tape T is damaged.

The present invention has been made to solve the above-described inconvenience, and provides a magnetic recording / reproducing apparatus capable of normally winding a magnetic tape without damaging the magnetic tape even if the tape path of the magnetic tape is adjusted. It is a thing.

[Means for Solving the Problems]

In the magnetic recording / reproducing apparatus according to the present invention, the reference pin is provided at a connecting portion with which the lower surface of the cassette abuts, and at one end of the connecting portion, the shaft of the tape guide is slidably inserted. The tape guide is composed of a mating part and a convex part provided at the other end of the connecting part and fitted into the reference hole of the cassette. By rotating the female screw part of the tape guide, the coil spring is expanded and contracted. The engaging portion is engaged with the shaft of the tape guide so that the reference pin together with the portion can slide on the shaft of the tape guide.

[Action]

In the magnetic recording / reproducing apparatus according to the present invention, when the female screw portion of the tape guide is rotated to adjust the tape path, the coil spring expands and contracts so that the reference pin slides along the tape guide portion with respect to the shaft.

Therefore, even if the tape path is adjusted, the relative position between the cassette and the magnetic tape can be kept constant.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a tape guide mechanism of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, parts that are the same as or correspond to those in FIGS. 2 to 4 are given the same reference numerals, and descriptions thereof will be omitted.

Note that FIG. 1 corresponds to FIG.

Reference numeral 21 denotes a base, which is provided with a second (first) hole 21b (21a).

Reference numeral 23 (22) denotes a second (first) reference pin provided in the vicinity of the seventh (first) tape guide 12 (3), and has a stepped portion with which the lower surface of the cassette C abuts. Connecting part 23a (22a)
And provided at one end of this connecting portion 23a (22a),
The sleeve 23b (22b) as an engaging portion into which the shaft 12a (3a) of the (first) tape guide 12 (3) is slidably inserted.
And a first portion which is provided on the upper surface of the other end of the connecting portion 23a (22a) and which is fitted into the _second ( _first ) reference hole h ₂ (h ₁ ) of the cassette C.
Of the convex portion 23c (22c) and the other end of the connecting portion 23a (22a), and penetrates the second (first) hole 21b (21a) of the base 21 to form the seventh (first ) Tape guide 12 (3) Shaft 12a
The second convex portion 23d (22d) whose rotation with respect to (3a) is restricted
It consists of and.

The lower side of the connecting portion 23a (22a) abuts the coil spring 12b (3b) of the seventh (first) tape guide 12 (3), and the upper side thereof is the seventh (first) tape guide 12 (3). The sleeve 23b (22b) is positioned inside the coil spring 12b (3b) by abutting on the lower guide flange 12c ₁ (3c ₁ ) constituting the tape guide portion 12c (3c).

Therefore, the second (first) reference pin 23 (22) is
It becomes possible to slide with the sleeve 23b (22b) with respect to the shaft 12a (3a) of the (first) tape guide 12 (3).
Second protrusion 23d (22d) penetrating the (first) hole 21b (21a)
The rotation is blocked by.

Next, the operation will be described with reference to FIG.

When the cassette C is loaded and set in the magnetic recording / reproducing apparatus, the first convex portions 22c, 2 of the first and second reference pins 22,23 are set.
Since 3c is fitted to the first and second reference points h ₁ and h ₂ of the cassette C and the lower surface of the cassette C abuts on the connecting portions 22 and 23, the cassette C is set to the first and second reference pins 22, It is positioned by 23 as well as horizontally.

When the cassette C is positioned as described above, the cassette C is biased toward the base 21 by a biasing member (not shown).

When the magnetic tape T is threaded as described above with the cassette C loaded as described above and the tape path is adjusted while the magnetic tape T is running,
When the female screw portions 3d, 12d of the seventh tape guide 3, 12 are rotated, the coil springs 3b, 12b expand and contract, and the tape guide portions 3c, 12c and the first and second reference pins 22, 23. Moves vertically, the tape path of the magnetic tape T can be adjusted without changing the relative position between the cassette C and the magnetic tape T.

Therefore, even if the tape path of the magnetic tape T is adjusted, the relative position between the cassette C and the magnetic tape T does not change, so that the magnetic tape T can be run without being damaged,
Can be rolled up.

In the above embodiment, the first and second reference pins 22 and 23 are
To prevent the shaft from rotating with respect to the shafts 3a and 12a.
21 first and second holes 21a and 21b and first and second reference pins 22 and 23
Although the second convex portions 22d and 23d constitute the rotation preventing means, this rotation preventing means is not always necessary.

Further, when the rotation preventing means is provided, it functions similarly to the above-mentioned embodiment, that is, the first and second reference pins 22 and 23.
It goes without saying that any structure may be used as long as it can prevent the rotation of the shaft with respect to the shafts 3a, 12a.

[Effect of device]

As described above, according to the present invention, when the tape guide is adjusted to adjust the tape path, the reference pin for positioning the cassette also moves at the same time, so that the relative position of the cassette and the magnetic tape does not change.

Therefore, there is an effect that the magnetic tape can be run or wound without damage.

[Brief description of drawings]

1 is a sectional view showing a reference pin and a tape guide of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view for explaining the magnetic recording / reproducing apparatus, and FIG. 3 is a conventional magnetic recording apparatus. FIG. 4 is a sectional view showing the reference pin and tape guide of the reproducing apparatus, and FIG. 4 is a sectional view for explaining the operation of the reference pin and tape guide of the conventional magnetic recording and reproducing apparatus. 3 ... Tape guide (first tape guide), 12 ... Tape guide (seventh tape guide), 3a, 12a ... Shaft, 3a
₁ , 12a ₁ …… Male thread, 3b, 12b …… Coil spring, 3c, 12c…
… Tape guide part, 3d, 12d …… Female screw part, 21 …… Base,
21a ... first hole, 21b ... second hole, 22 ... reference pin (first reference pin), 23 ... reference pin (second reference pin), 22a, 23a ... connecting portion, 22b, 23b ... Engaging portion (sleeve), 22c, 23c ... Convex portion (first convex portion), 22d, 23d ... Second convex portion, C ... Cassette, T ... Magnetic tape, h ₁ ……
Reference hole (first reference hole), h ₂ ... reference hole (second reference hole).

Claims (1)

[Scope of utility model registration request] 1. One end portion is attached to a base, and the other end is provided with a convex portion that fits into a reference hole of a cassette and a step portion that positions the cassette at a predetermined height from the base. By rotating the reference pin and the female screw portion screwed to the male screw portion provided at the other end portion of the shaft having one end portion attached to the base near the reference pin,
A magnetic recording / reproducing apparatus comprising: a tape guide capable of adjusting the height of a tape guide portion from the base by expanding and contracting a coil spring, wherein the reference pin is a connecting portion with which the lower surface of the cassette abuts. , An engaging portion that is provided at one end portion of the connecting portion and through which the shaft is slidably inserted, and a convex portion that is provided at the other end portion of the connecting portion and that fits into the reference hole of the cassette. By rotating the female screw portion of the tape guide, the coil spring is expanded and contracted so that the reference pin and the reference pin can slide with respect to the shaft together with the tape guide portion. A magnetic recording / reproducing apparatus characterized in that the magnetic recording / reproducing apparatus is engaged with.