JPH04115316U - Fixed magnetic head assembly in magnetic recording device - Google Patents

Abstract

(57) [Summary] [Configuration] Post 1 whose inclination angle can be adjusted by elastic deformation
Mount 15 rotatable around fixing screw 16
The parts press-fitted are placed on both sides of the fixed magnetic head 2.
Further, a support beam 13 is provided on the mount 15, and a beam 17 is provided next to the mount 15, and each is fixed to the member below. Cut female threads in these and attach adjustment screws (B) 20 to the support beam 13.
Also, attach the adjusting screw (C) 21 to the beam 17. Adjust the inclination angle of the post 12 using the adjustment screw (B) 20.
The angle of inclination of the post 12 can be adjusted using the adjustment screw (C) 21. By adjusting the inclination of the post 12, the attitude of the magnetic tape wound around the post 12 can be changed. [Effect] Stabilizes the running of the magnetic tape around the fixed magnetic head, reducing damage to the magnetic tape.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a fixed magnetic head assembly, particularly for helical recording on magnetic tape. In magnetic recording devices such as video tape recorders, control signals are sent to the magnetic tape. recording signals, audio signals, etc., or reproducing the above signals recorded on magnetic tape. The present invention relates to a fixed magnetic head assembly.

0002

[Conventional technology]

Generally used in magnetic recording devices such as video tape recorders (hereinafter referred to as VTR). The magnetic tape that is used has a controller near its top and bottom ends that controls the running speed of the magnetic tape. A linear track is provided for recording troll signals, audio signals, etc. Then write the above control signals, audio signals, etc. to these tracks. In order to read or reproduce the above written signals, a magnetic tape must be installed on the magnetic tape running path. A fixed magnetic head is used. First, we will explain the conventional technique using Figs. 4 and 5. Explain the technique. In addition, all the models shown in Figures 1 to 3 showing the present invention have the same functions and functions. Components having the same number are given the same number.

0003 A fixed magnetic head assembly 100 in a conventional magnetic recording device such as a VTR is shown in FIG. As shown in (a) as a plan view and as shown in (b) as a front view, a fixed magnetic head is attached to the sheet metal member 1. Fix the board 2 with screws or adhesive, and then attach the leaf spring 3 under the sheet metal member 1. The magnetic tape of the fixed magnetic head 2 is arranged so as to be sandwiched with the magnetic head member 9. The sheet metal member 1 and the base member 9 are connected with the adjustment screw (A) 4 that adjusts the attitude with respect to the loop 7. The subassembly is fixed to the base on the stud 8 installed on the mechanical chassis 10. It had a structure in which it was fixed with screws 11. In addition, in Fig. 4, numeral 5 is a mechanical shear. A tape guide post 6 stands perpendicularly to the magnetic tape 10, and a tape guide post 6 guides the lower end of the magnetic tape. The respective flanges are shown.

0004 By the way, in the conventional fixed magnetic head assembly 100, when the magnetic tape is running, , accurately transmit control signals, audio signals, etc. to predetermined locations on the magnetic tape 7. In order to write or efficiently read out the written signal. , as shown in FIG. 5(b), the fixed magnetic head 2 is moved at an angle α in the + direction around the X axis. Rotate the tape once and attach it to the base member 9. When the tape is running, it is attached to the base member 9 as shown by the arrow F in Fig. 5(a). By applying a downward force from the fixed magnetic head 2 to the magnetic tape 7, the magnetic The lower end of the air tape 7 is always in contact with the flange portion 6. That is, the magnetic tape Guide the lower end of the tape guide post 5 to the flange 6 at the lower end of the vertical tape guide post 5. Therefore, the magnetic tape 7 is structured so that it does not move up and down in the width direction while running. was taken.

[0005]

[Problem that the idea aims to solve]

In the above-described conventional fixed magnetic head assembly, the magnetic tape 7 is mechanically coated during device manufacturing. Even if the inclination of the fixed magnetic head 2 is carefully adjusted to avoid damage, , due to the surface characteristics of the magnetic tape 7, the relationship between the tape guide posts and the magnetic tape 7 is Change the running speed of the magnetic tape 7 such as increase/decrease in friction coefficient, fast forward playback, etc. to the running speed during standard playback. Increases and decreases in tape tension due to changes from A serious problem was occurring.

[0006] (1) The magnetic tape 7 and the tape guide post 5 are no longer perpendicular, so , the lower end of the magnetic tape 7 is strongly pressed against the flange portion 6, and as a result, the magnetic tape The lower end of 7 is damaged.

[0007] (2) Near the lower end of the magnetic tape 7 pressed against the flange portion 6, the magnetic tape 7 deformation (wrinkles; see FIG. 5(c)) or the lower end of the magnetic tape 7. may get on the flange part 6, and it may not be properly placed in the specified position on the magnetic tape 7. Control signals, audio signals, etc. cannot be recorded, or have already been written. Therefore, it is not possible to efficiently read out the signal that is being displayed.

[0008] Therefore, the purpose of this invention is to prevent damage to the end face of the magnetic tape while the tape is running, and to prevent the end face from being damaged. Do not cause abnormal deformation or allow the end of the tape to ride on the flange. In other words, we provide a fixed magnetic head assembly that does not apply mechanical stress to the magnetic tape. There are many things.

[0009]

[Means to solve the problem]

The fixed magnetic head assembly in the magnetic recording device of the present invention tilts due to elastic deformation. A post with an adjustable angle and a female thread adjacent to the post. a support beam, the post and one end of the support beam are fixed and centered around a fixing screw; The mount is rotatably attached to the top surface of the sheet metal member, and some parts have internal threads. a beam that is fixedly attached to the sheet metal member, and first and second adjustments; a screw, and a tension coil spring, the first adjustment screw being connected to the support beam. By engaging with the internal thread provided on the post and bringing its tip into contact with the post, the post adjusting the inclination angle of the beam, and the second adjustment screw is provided on the beam and engaged with a female screw. A structure in which the tip of the post is brought into contact with the mount to adjust the inclination direction of the post. The tape guide assembly is arranged on both sides of a fixed magnetic head.

0010

【Example】

Next, the present invention will be explained with reference to the drawings.

[0011] 1(a) and (b) are a plan view and a front view showing an embodiment of the present invention, and FIG. (a) and (b) are front views showing details of the tape guide assembly in section A of Fig. 1(a). and a side view, and FIG. 3 shows the relationship between the tape guide post and the magnetic tape in this embodiment. FIG.

0012 The tape guide assembly, which is an important component of this example, 12, support beam 13, spring hook (A) 14, mount 15, fixing screw 16, beam 17, spring hook (B) 18, tension coil spring 19, adjustment screw (B) 20 and and an adjustment screw (C) 21.

[0013] That is, one end of the post 12 is fixed vertically to the mount 15, and It has a structure that can be elastically deformed near the fixed part. The adjustment screw (B) 20 is connected to the upper end. A support beam 13 with matable internal threads mounts its lower end adjacent to the post 12. It is fixed at 15. A part has a female thread that engages with the adjustment screw (C) 21, and The beam 17 into which the spring hook (B) 18 is press-fitted is firmly fixed to the sheet metal member 1. ing. In addition, the tension coil spring 19 is attached to a spring hook press-fitted into the mount 15 ( A) 14 and spring hook (B) 18, and the fixing screw 16 is used as the rotation axis. A force for rotating the mount 15 in the direction of the beam 17 is applied to the mount 15. adjustment screw (B) 20 is installed in the support beam 13 and is screwed into a female screw, the tip of which is attached to the post 12. The adjustment screw (C) 21 is a female thread provided on the beam 17. The tip is in contact with the mount 15.

[0014] By the way, in the fixed magnetic head assembly of this embodiment, as shown in FIG. In addition to the example, a pair of tape guide assemblies having the above structure are installed at both ends of the fixed magnetic head 2. has been done. And on the outside thereof, there is a vertical tape guide with a flange part 6 at the lower end. A post 5 is arranged.

[0015] In the fixed magnetic head assembly of this embodiment having such a structure, the running of the magnetic tape 7 is In order to avoid applying mechanical stress to the magnetic tape 7 at the flange portion 6, the following mechanical Make adjustments. First, slightly screw in the adjustment screw (B) 20 to tilt the post 12 forward. let Next, while observing the running state of the magnetic tape 7, adjust the adjustment screw (C) 2. 1, the magnetic tape 7 is pulled up against the tensile force of the coil spring 19, and the magnetic tape 7 is moved to the vertical tape guide. screw it so that it runs perpendicular to the do post 5. That is, around the X axis of the post 12 To adjust the inclination, insert the adjustment screw (B) 20 attached to the support beam 13 onto the post This can be done by pressing, and the tilt direction around the Z axis can be adjusted by pressing the beam 1. By pressing the adjustment screw (C) 21 attached to 7 onto the mount 15. It can be carried out. As a result, as shown in FIG. It is guided by the lunge portion 6. In other words, the problem that occurs with conventional fixed magnetic head assemblies It is possible to avoid problems that may arise.

[0016]

[Effect of the idea]

As explained above, according to the present invention, a pair of By rotating the two adjustment screws on the tape guide assembly, you can adjust the tilt angle and direction of the post. This allows the magnetic tape to be aligned perpendicularly to a vertical post. It can be made to run. Therefore, compared to conventional fixed magnetic head assemblies, the magnetic It is possible to reduce the pressure applied to the flange at the bottom end of the magnetic tape. The edge of the magnetic tape may be damaged or deformed near the bottom edge of the magnetic tape when the tape is running. Do not cause the end face of the magnetic tape to ride on the flange. This has the effect of improving tape running around the fixed magnetic head.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, with FIG. 1(a) being a plan view and FIG. 1(b) being a front view.

FIG. 2 shows the tape guide assembly in section A in FIG. 1(a) in detail, with FIG. 1(a) being a front view and FIG. 1(b) being a side view.

FIG. 3 is a side view showing the relationship between the tape guide post and the magnetic tape in this embodiment.

FIG. 4 shows a conventional fixed magnetic head assembly, with FIG. 4(a) being a plan view and FIG. 4(b) being a front view.

5 shows the state of the magnetic tape; FIG. 5(a) is a diagram showing the tape support relationship; FIG. 5(b) is a side view showing the posture of the fixed magnetic head after adjustment; FIG. FIG. 3 is a side view showing the relationship between a tape guide post and a magnetic tape in a conventional example.

[Explanation of symbols]

1 Sheet metal parts 2 Fixed magnetic head 3 Leaf spring 4 Adjustment screw (A) 5 Tape guide post 6 Flange part 7 Magnetic tape 8 Stud 9 Base member 10 Mecha chassis 11 Base set screw 12 Post 13 Support beam 14 Spring hook (A) 15 Mount 16 Fixing screw 17 Beam 18 Spring hook (B) 19 Tension coil spring 20 Adjustment screw (B) 21 Adjustment screw (C)

Claims (1)

[Scope of utility model registration request] 1. A post whose inclination angle can be adjusted by elastic deformation, a support beam adjacent to the post and partially provided with a female thread, and one end of the post and the support beam fixed with a fixing screw. a mount rotatably attached to the upper surface of the sheet metal member, a beam having a female thread in a portion thereof and firmly attached to the sheet metal member, first and second adjustment screws, and a tensioner. a coil spring, the inclination angle of the post is adjusted by engaging the first adjustment screw with a female screw provided on the support beam and bringing its tip into contact with the post; A tape guide assembly is arranged on both sides of the fixed magnetic head, and the tape guide assembly is configured to adjust the inclination direction of the post by engaging an adjustment screw No. 2 provided on the beam with a female screw and bringing its tip into contact with the mount. A fixed magnetic head assembly in a magnetic recording device, characterized in that: