JPH0627000Y2 - Tape guide positioning device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention draws a magnetic tape to the outside of a tape cassette and winds it around a rotating magnetic drum installed outside the cassette for a predetermined angle to record and reproduce signals. The present invention relates to a tape guide positioning device used in a magnetic tape device of the type described above.

[Conventional technology]

FIG. 6 is a sectional view of a conventional tape guide positioning device, and FIG. 7 is a plan view.

As shown in these figures, in the tape guide body positioning device A ′, the tape guide body 7 slides along the guide groove 2 a of the substrate 2. A boss portion 9 is erected on the tape guide body 7, and the boss portion 9 is positioned by the boss portion 9.
Are abutted against the V-shaped portion 8a and the U-shaped portion 8b.

The operation of the conventional example will be described. The tape guide 7
Moves along the guide groove 2a of the substrate 2 and comes into contact with the positioning member 8 to be positioned and fixed as shown in FIG. At this time, the front-back inclination of the tape guide body 7, that is, the XY plane direction is determined by the rear end portion 7a and the front end portion 7b of the tape guide body 7 and the V-shaped portion 8a of the positioning member 8. The plane coordinates on the XZ plane shown in FIG. 7 are determined by the guide groove 2a and the V-shaped portion 8a of the substrate 2. Furthermore, the left and right inclination, that is, the ZY plane direction, is V-shaped
a and the boss 9 of the tape guide 7 and the U of the positioning member 8
It is determined by the character-shaped portion 8b.

[Problems to be solved by the invention]

By the way, as described above, conventionally, in the positioning in the YZ plane direction, the boss portion 9 of the tape guide body 7 is positioned by the V-shaped portion 8a and the U-shaped portion 8b.
Therefore, there is a problem that the dimensional accuracy and management of the U-shaped portion 8b is difficult and the component is expensive. If the height of the tape guide is adjusted after positioning, U
Rattling due to a slight gap between the character-shaped portion 8b and the boss portion 9 of the tape guide body 7 becomes uncertain as to which side of the U-shaped portion 8b is rattled, which causes a problem in stability of performance. there were.

An object of the present invention is to solve the above problems and to provide a tape guide body positioning device with which it is possible to constantly move a minute backlash when positioning the tape guide body in one direction, and which has improved performance stability. Especially.

[Means for solving problems]

In order to achieve the above object, the present invention draws out the magnetic tape from a tape cassette containing a reel hub around which the magnetic tape is wound, and runs the recording tape while it is attached to a rotary head cylinder installed outside the tape cassette. And a tape guide that reciprocates between a position where the magnetic tape in the tape cassette can be pulled out and a position where the magnetic tape can be pulled out of the tape cassette and brought into contact with the rotary head cylinder. A tape guide body positioning device comprising a body and a positioning and fixing means having a V-shaped portion and a U-shaped portion for positioning and fixing the tape guide body, wherein the V-shaped portion is in contact with the tape guide body. The two abutting portions contacting each other have a step in the direction perpendicular to the tape running direction and are in contact with each other.

[Action]

Since the tape guide positioning device of the present invention is configured as described above, the claw portion of the V-shaped portion 3 is provided with a step or an inclination in the vertical direction with respect to the tape running direction. Therefore, when the boss portion of the tape guide body is brought into contact with the V-shaped portion 3, a rotational biasing force is generated in the counterclockwise direction in FIG. 2 about the midpoint of the pawl portion in the boss portion. Then, the lower portion of the boss portion is brought into contact with the left end surface of the U-shaped portion. As a result, a slight backlash of the U-shaped portion can be moved in one direction and can be held stably.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a tape guide positioning device according to the present invention, in which A is a tape guide positioning device, 1 is a positioning member, 2 is a substrate, 3 is a V-shaped portion,
3a and 3b are claws, 4 is a U-shaped part, and 4a and 4b are end faces.

FIG. 2 is a front view showing a state in which the boss portions are brought into contact with each other in FIG. 1, 6 is a boss portion, 7 is a midpoint, and portions corresponding to FIG. There is.

FIG. 3 is a side sectional view of FIG. 2, and 5 is a tape guide body, and portions corresponding to FIG.

FIG. 4 is a plan view of FIG. 3, and the portions corresponding to FIG.

In these figures, the tape guide positioning device A is
A positioning member 1 which is a positioning and fixing means is screwed and fixed on the substrate 2. A guide groove 2a is formed in the substrate 2, and the tape guide body 5 is slidably provided. A boss portion 6 is erected on the tape guide body 5, and the boss portion 6 comes into contact with the positioning member 1 by the movement of the tape guide body 5 and the tape guide body 5 is tilted to the left and right, that is, the ZY plane direction is positioned. To be done.

The positioning member 1 includes a V-shaped portion 3 that abuts a boss portion 6 located on the upper surface of the tape guide body 5 and a U-shaped portion 4 that abuts the boss portion 6 located on the lower surface. . The V-shaped portion 3 is formed such that its claw portions 3a and 3b have a step in the direction perpendicular to the tape running direction. Further, the U-shaped portion 4 is formed to be slightly larger than the boss portion 6 between the end surfaces 4a and 4b. B is both claws 3
It is the midpoint of a and 3b.

Next, the operation of the tape guide positioning device configured as described above will be described.

The tape guide body 5 moves along the guide groove 2a of the substrate 2,
The position where you can pull out the magnetic tape in the tape cassette,
The magnetic tape is reciprocated between a position where the magnetic tape can be pulled out of the tape cassette and brought into contact with the rotary head cylinder. This latter position is shown in FIGS.
That is, the tape guide body 5 moves and the boss portion 6 contacts the positioning member 1. Then, the upper portion of the boss portion 6 comes into contact with the pawl portions 3a and 3b of the V-shaped portion 3, but these pawl portions 3a and 3b are formed with a step in the vertical direction as shown in FIG. Therefore, the boss 6 is centered around the middle point B.
A rotation biasing force is generated in the counterclockwise direction by the claws 3a and 3b. Therefore, the boss portion 6 is inclined as shown by the alternate long and short dash line in FIG. 2, and the lower portion is the right end surface 4 of the U-shaped portion 4.
It is abutted against a, and is held in a state of being always rattled.

It should be noted that the XY and XZ plane directions are positioned as in the conventional case.

In one embodiment configured as described above, when the tape guide body 5 is positioned, it is possible to constantly move the minute play, which has been conventionally present, in one direction, and improve the stability of performance. You can

FIG. 5 is a front view showing another embodiment of the present invention, in which parts corresponding to those in FIG.

In the embodiment shown in FIG. 5, the pawl portions 3a 'and 3b' of the V-shaped portion 3'are formed to be inclined and have a step.

In the embodiment configured in this way, the boss portion 6 and the pawl portion 3 are the same as in the embodiment shown in FIGS. 1 to 4 described above.
A rotational biasing force is generated by a'and 3b ', and the lower side of the boss portion 6 is brought into contact with the right end surface 4a of the U-shaped portion 4. As a result, a slight amount of backlash can always be backed up in one direction, and an effect similar to that of the above-described embodiment can be obtained.

[Effect of device]

As described above, according to the present invention, when the tape guide body is positioned, it is possible to always move the minute amount of play, which has been present in the past, in one direction, so that the tape guide can be stably held and the performance is stable. Can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a tape guide body positioning device according to the present invention, and FIG. 2 is a front view showing a state in which a boss portion of the tape guide body positioning device is brought into contact with a V-shaped portion.
FIG. 3 is a side sectional view of the tape guide positioning device, FIG. 4 is a plan view of the tape guiding device positioning device, and FIG. 5 is a front view showing another embodiment of the tape guiding device positioning device according to the present invention. FIG. 6 is a side sectional view of a conventional tape guide positioning device, and FIG. 7 is a plan view of FIG. A ... Tape guide body positioning device, 1 ... Positioning member, 2
... substrate, 3 ... V-shaped portion, 3a, 3b ... claw portion, 4 ... U
Character-shaped portions, 4a, 4b ... End surfaces, 5 ... Tape guide body, 6 ...
Boss, B ... Midpoint.

Claims (2)

[Scope of utility model registration request] 1. A device for recording and reproducing by pulling out the magnetic tape from a tape cassette containing a reel hub around which a magnetic tape is wound and running while being attached to a rotary head cylinder installed outside the tape cassette. The tape guide is provided with a tape guide body that reciprocates between a position where the magnetic tape in the tape cassette can be pulled out and a position where the magnetic tape can be pulled out of the tape cassette and brought into contact with the rotary head cylinder. A tape guide body positioning device comprising positioning and fixing means having a V-shaped portion and a U-shaped portion for positioning and fixing a body,
The tape guide body positioning device, wherein two contact portions at which the V-shaped portion comes into contact with the tape guide body have a step in a direction perpendicular to the tape running direction, and are brought into contact with each other. . 2. The tape guide positioning device according to claim 1 of the utility model registration, wherein the V-shaped portion is formed to be inclined with respect to the tape running direction to form the step.