JPS6212914A - Auto-cleaner - Google Patents

Abstract

PURPOSE:To reduce a shock sound at driving a solenoid by forming a dumper mechanism on the back part of the solenoid in an auto-clear. CONSTITUTION:The dumper 18 is formed on the back part of the solenoid 13 in the auto-cleaner. When the auto-cleaner is ON, the solenoid 13 is attracted, a plunger 16 is abutted upon the shaft 20 of the dumper 18 on the way, the solenoid 13 is gradually attracted, and finally the plunger 16 is abutted upon the solenoid 13. Although the shock sound of the solenoid 13 is generated at the collision of the plunger 16 with the solenoid 13 (iron core 17'), the operation of the plunger 16 contacted with the shaft 20 is buffed by the oil of the dumper 18 and the shock sound is reduced. In addition, the shock sound of a stopper 15 for stopping the rotation of an arm 10 is inevitably reduced by the reduction of the shock of the plunger 16.

Description

[Detailed Description of the Invention] [Summary] An auto-cleaner for cleaning a magnetic head, which is provided with a damper mechanism at the rear of a solenoid that is a driving part of the auto-cleaner, and uses the damper to reduce spot impact during operation of the auto-cleaner. Reduce sound.

[Industrial application field]

The present invention relates to a magnetic tape device, and more particularly to an autocleaner that reduces impact noise during operation of the autocleaner for cleaning a magnetic head.

When a magnetic tape device is operated for a long period of time, the magnetic head used becomes dirty, leading to poor read/write performance and, in some cases, to the inability to read/write. Therefore, before installing a reel wound with magnetic tape in a magnetic tape device, it has been conventional practice to lightly wipe the head portion with a cotton swab or the like. Since this alone is insufficient for cleaning, an auto-cleaner is provided to clean the head section while rewinding the magnetic tape onto the reel.

Since the impact noise of the solenoid in the drive section is large when the auto cleaner operates, it is desired to reduce the impact noise.

[Conventional technology]

FIG. 4 is a diagram illustrating cleaning using a conventional cleaning ribbon, in which (a) shows a plan view and (b) shows a front view.

In the figure, 1 is a magnetic tape, 2 is a head, 3 is a guide for the cleaning ribbon 4, 5 is a cleaning ribbon reel, and 6 is a drive shaft for the cleaning ribbon reel, on which the cleaning ribbon 4 moves in the direction of the arrow. As a result, the cleaning ribbon 4 enters between the magnetic tape 1 and the head 2, cleaning the head portion and protecting the head 2 during tape fast rewinding or rewinding.

Details of the auto cleaner that cleans the head section by moving the cleaning ribbon 4 in the direction of the arrow are shown in FIGS. 5(A) and 5(B).

Figure 5 (a) is an overall view of the auto cleaner, and the figure shows head 2.
It is in contact with the cleaning state.

There are upper and lower reels 8,8' inside the box 7, and the cleaning ribbon 4 is wound around the upper reel 8, and the cleaning ribbon 4 fed out from the reel 8 is guided to the ribbon guide 9 shown in FIG. 5(b). It travels on the surface and is wound onto the reel 8' below.

During read/write, the cleaning ribbon 4 is moved in the direction of arrow a to remove it from contact with the head 2.

Therefore, the ribbon guide 9 with a rectangular frame shown in FIG. The solenoid 13 is connected to the solenoid 13 fixed to the box 7 via the solenoid 13, and the ribbon guide 9 is moved up and down by driving the solenoid 13. In addition, 14 is a ribbon tension mechanism that applies tension to the cleaning ribbon 4, 15 is a stopper,
The arm 10 rotating at the fulcrum 11 is stopped by driving the solenoid 3, and the ribbon guide 9 is positioned.

[Problem that the invention seeks to solve]

When the conventional autocleaner shown in FIG. 5 operates, the solenoid 13 makes a loud impact sound. This has the problem that the impact noise generated by the collision between the plunger 16 and the iron core 17 of the solenoid 13, the impact noise generated by the arm 10 hitting the stopper 15, and the resonance of these sounds can be unpleasant to the ears. .

[Means for solving problems]

FIG. 1 shows a detailed illustration of the invention.

FIG. 1 shows an autocleaner in which a damper mechanism is provided at the rear of the solenoid (drive section).

In the figure, the arm 10 is supported at a fulcrum 11 as in the conventional case, and the arm 10 rotates at the fulcrum 11 during operation.

15 is a stopper for stopping the rotation of the arm 10. The arm 10 is connected to a plunger 16 of a solenoid 13' by a connecting spring 12, and a commercially available hydraulic damper 18 is provided at the rear of a core 17' that attracts the plunger 16. The hydraulic damper 18 has a shaft 20 and a shaft 20.
It consists of an oil chamber 21 in which the oil operates, and an oil switching passage 22,
Furthermore, it is supported by a support fitting 19 fixed to the box 7 with screws so that its position can be adjusted.゛In addition, the shaft 20 is attached to the iron core 17'.
It has a hole through which it moves.

[Effect]

That is, when the auto cleaner is in the position F, the plunger 16 of the solenoid 13 is separated by the connection spring 12, as shown in FIG. 2(b). When the auto cleaner is ON, the plunger 16 of the solenoid 13 is sucked as shown in FIG.
The solenoid 13 is gradually attracted by the shaft 20 of the
Finally, the plunger 16 hits the solenoid 13. When the plunger 16 hits the solenoid 13, the impact sound is dampened by the damper 18. Also, axis 2
By mitigating the impact of 0, the impact between the arm 10 rotating at the fulcrum 11 and the stopper 15 is naturally reduced, and the harshness on the ears can be prevented.

〔Example〕

FIG. 3 is a diagram explaining the present invention in detail.

Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 3 is an overall view of the autocleaner, showing a cleaning state in which the cleaning ribbon 4 and the belly button are in contact with each other.

In the figure (see Fig. 5), there are upper and lower reels inside the box 7 as in the conventional case, and the cleaning ribbon 4 is wound around the upper reel. and is wound onto the lower reel. During read/write, the cleaning ribbon 4 is moved in the direction of arrow a to remove contact with the head. Since all of these mechanisms are the same as the conventional ones, explanations of the mechanisms will be omitted.

In this embodiment, a damper 18 is provided at the rear of the solenoid 13' of the auto cleaner. (See FIG. 1) The arm 10 is supported on a fulcrum 11 within the box 7 in the same manner as before, and the arm 10 rotates on the fulcrum 11 during operation.

One end of the arm 10 is in contact with a stopper 15 that stops the rotation and positions the ribbon guide, and the other end is in contact with a stopper 15 that stops the rotation and positions the ribbon guide.
2 to the solenoid 13. The solenoid 13 is supported by a support fitting 19 fixed to the box 7, and a damper (a commercially available hydraulic damper) 18 is provided at the rear of the solenoid 13. Note that the hydraulic damper 18 is connected to the shaft 20
, an oil chamber 21 , and a passage 22 through which oil is switched between the oil chambers 21 by a valve 23 at the tip of the shaft 20 . Note that the iron core 17' of the solenoid 13 is provided with a hole through which the shaft 20 moves.

When the auto cleaner is ON, the solenoid 13 is sucked, the plunger 16 hits the shaft 20 of the damper 18 on the way, it is gradually sucked by the solenoid 13, and finally the plunger 16 hits the solenoid 13.

Solenoid impact sound is caused by plunger 16 and solenoid 1
3 (iron core 17') but the oil in the damper 18 dampens the movement of the plunger 16 in contact with the shaft 20, reducing the impact noise. Also, plunger 1
By reducing the impact of 6, the impact noise of the stopper 15 that stops the rotation of the arm 10 is naturally reduced.

In order to compare the autocleaner of the example with the conventional autocleaner, the microphones of the sound level meter were installed 30 cm apart as an experimental condition. As a result, the A characteristic of the measurement standard was 94db in the conventional autocleaner, but it was 89db in the autocleaner of the example,
It decreased by 5db. This 5 db reduction lowered the treble part, making it much easier to listen to.

〔Effect of the invention〕

As described above, according to the present invention, by providing a damper mechanism at the rear of the solenoid of the autocleaner, it is possible to reduce impact noise when the solenoid is operated.

[Brief explanation of drawings]

Figure 1 is a diagram explaining the present invention in detail, Figure 2 is a diagram explaining the solenoid operation of the present invention, Figure 3 is a diagram explaining the invention in detail, Figure 4 (a) and (b) are diagrams explaining the invention in detail. FIGS. 5A and 5B are diagrams illustrating a conventional auto cleaner. In the figure, 4 is a cleaning ribbon, 7 is a box, IO is an arm, 11 is a fulcrum, 12 is a connection spring, 13 is a solenoid, 15 is a stopper, 16 is a plunger, 17'' is an iron core, 18 is a damper, and 19 is a support Metal fittings, 20 is the shaft, 21 is the oil chamber, 22 is the passage, (B) (A) At 2θFF At θN

Claims (1)

[Claims] An autocleaner comprising a cleaner ribbon storage section, a section for applying the cleaner ribbon to the head, and a drive section for driving the corresponding section.
13'), a damper (18) is provided at the rear of the solenoid (13'), and the damper (18) reduces impact noise during autocleaner operation.