JPS5853729Y2 - Magnetic tape guide post - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic tape guide post that can be pressed in a magnetic recording/reproducing device.

In magnetic recording and reproducing devices, guide posts are provided on the running path of the magnetic tape in order to regulate the running position of the magnetic tape.

A conventional guide post will be explained with reference to FIG.

In the figure, 1 is a magnetic tape, 2 is a guide post having an upper flange 3 and a lower flange 4, and the position of the magnetic tape 1 is adjusted between the upper and lower flanges.

By the way, since there is variation in the width of the magnetic tape 1, the spacing a between the flanges of the guide post 2 is slightly larger than the average value.

Therefore, the position of the magnetic tape moves up and down while it is running, making it impossible to accurately adjust its position.

This movement of the position of the magnetic tape during running is an important problem that needs to be solved in recent magnetic recording and reproducing devices that perform high-density recording. A guide post 5 having a taper as shown in FIG.

This guide post 5 has a component force P2 in the taper direction of a force P1 that acts in the vertical direction due to the contact pressure of the magnetic tape 1, which acts as a regulating force to push down the magnetic tape 1, and pushes the lower end of the magnetic tape 1 into the lower 7 langes. 4.

However, there are guide posts in several places on the running path of the magnetic tape that presses a button on a magnetic recording/reproducing device, and the contact pressure at each guide post is different due to the difference in the tension of the magnetic tape. In a device that is used in several locations, there are differences in the force for regulating the magnetic tape at each guide post, which poses an obstacle to accurately regulating the position of the magnetic tape.

In view of this point, the present invention focuses on adjusting the difference in regulating force due to the difference in the contact pressure of the magnetic tape against the guide post by using the taper angle of the guide post, and aims to provide a guide post that allows this adjustment. It is intended.

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

In the figure, 1 is a magnetic tape, 2 is a guide post, and 4 is a lower flange.

Reference numeral 6 denotes an adjustment ring that is loosely fitted into the upper small diameter portion 7 of the guide post 2, and is connected by a screw 10 to an L-shaped fitting 9 that is fixed to the upper small diameter portion 7 with a screw 8. It is formed with a thick diameter.

Therefore, there is a step difference between the guide post 2 and the adjustment ring 6.
1, and this step 11 is adjusted by a screw 10.

The upper part of the magnetic tape 1 is pressed to the adjustment ring 6, and the lower part is pressed to the guide post 2, forming a tapered part in the middle.

In FIG. 3C, if the force acting on the magnetic tape 1 at point P due to the pressure of the magnetic tape 1 against the adjustment ring 6 is Pl, then the regulating force pushing down the magnetic tape 1 is P.
2, and the size of P2 is determined by the taper angle a, which is determined by the size d of the step 11.

Therefore, by adjusting the size d of the step 11 with the screw 10, the regulating force of the guide post against the magnetic tape 1 can be adjusted.

As described above, the present invention provides an adjustment ring 6 having a diameter slightly larger than that of the guide post 2 at the upper end of the guide post 2 which has the flange 4 below which regulates the position of one end surface in the width direction of the magnetic tape 1. A magnetic recording device having a plurality of guide posts is configured so that a step 11 between the guide post 2 and the guide post 2 is adjustable, and the other end in the width direction of the magnetic tape 1 comes into pressure contact with the adjustment ring 6. In a playback device, the regulating force of the magnetic tape at each guide post can be adjusted in accordance with the contact pressure of the magnetic tape that is pressed on each guide post, and the regulation of the running of the magnetic tape can be adjusted throughout the entire device. It has the excellent effect of making high-density recording and playback possible.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing conventional guide posts. FIG. 3 is a diagram showing an embodiment of the guide post of the present invention, in which A is a side view, the opening is a sectional view, and C is an explanatory view of the operation. 1... Magnetic tape, 2... Guide post, 3... Upper flange, 4... Lower flange, 6... Adjustment ring,
7... Upper diameter small part, 8... Screw, 9... L-shaped fitting, 10... Screw, 11... Step.

Claims (1)

[Scope of utility model registration request] An adjustment ring having a diameter slightly larger than that of the guide post is attached to the upper end of the guide post which has a flange on the lower side that regulates the position of one end surface in the width direction of the magnetic tape, so that it is possible to adjust the level difference that occurs between the guide post and the guide post. A guide post for a magnetic tape, characterized in that the other end of the magnetic tape in the width direction is in pressure contact with the adjustment ring.