JPS61198462A - Tape guide for magnetic and recording device - Google Patents

Abstract

PURPOSE:To obtain a running path where rack of S and T sides is always stable by providing a rack gear driver moved in the lengthwise direction of the rack while meshing with the rack and a means controlling the rack gear driver through the detection of the end of loading. CONSTITUTION:The rack gear driver is moved until the difference of the movement between the S side rack and the T side rack is finished for absorption. When the rack drive gear is moved after the moving of the S side rack is stopped, a holding plate is moved while its slide hole uses a pin as a guise and when a switch detecting that the S side rack and the T side rack enter respectively S, T side catchers is operated, power to a motor is interrupted. However, after the detection, until an adhering force of a tape guide to the T side catcher is obtained, the power to the drive motor for the rack drive gear is not interrupted by using a delay circuit. Then the guide is constituted so as to absorb the difference between the S rack moving amount and the T side rack moving amount is absorbed thereby making the normal running path stable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a drive device for a magnetic tape guide in a magnetic recording/reproducing device.

[Background of the invention]

As a driving mechanism for a-ding a magnetic tape to a rotating cylinder, a tape guide mechanism is fixed to one end of a flexible movable member arranged approximately concentrically around the rotating cylinder on which a magnetic head is mounted. Attempts were made to wind the magnetic tape onto a rotating cylinder by moving the cylinder.

Such a loading mechanism will be explained with reference to FIGS. 1 to 5. Fig. 1 is a plan view of the magnetic recording/reproducing device in a stopped state, Fig. 2 is a plan view of the 70-distribution reproducing state, and Fig. 5 is a plan view of the supply side (hereinafter referred to as S side) rack in Fig. 1. be. In Figure 1, 1 is a base, 2 is an S side reel, 5 is a take-up side (hereinafter referred to as T side) reel, 4 is a cylinder equipped with a rotating magnetic head (not shown), and 6 is a cassette with two points. Indicated by a dashed line. Inside the cassette 6 is the S side 11-rule 2.
A magnetic tape 5 is mounted between the T-side wall S and the T-side wall S. On the other hand, the base 1 is provided with a KS-side rack guide groove 7 and a T-side rack guide groove 8 that are substantially concentric with the cylinder 4, and the S-side and T-side rack guides @7.8 S-side rack 9 and T-side rack 10 each made of flexible material such as resin
is inserted. Further, a hole for accommodating the rack drive gear 11 is provided between the two rows of S-side and T-side rack guide grooves 7 and 8, and the rack drive gear 11 inserted into this hole
are meshed with the gear portions of the S-side and T-side hooks 9 and 10, respectively, and drive the S-side and T-side hooks 9 and 10 by rotation of the rack drive gear 11.

Further, an S-side tape guide 12 and a T-side tape guide 15 are provided at one end of each of the S-side rack 9 and the T-side rack 10.
is fixed. When loading the magnetic tape 5 into the first/injector 4, first, the rack drive gear 11
is rotated in the direction of arrow (A) in FIG. , the 8-side tape guide 12 and the T-side tape guide 15 are also driven in the moving direction of their respective racks.During loading, the S-side tape guide 12 and the T-side tape guide 15 are moved by the S-side arm. 14 and T-side arm 15, but the S-side and T-side arms 14 and 15 are formed so as to be rotatable in the directions of arrows) and (e). Since the S-side and T-side arms 14 and 15 are attached via springs (not shown) that are biased in directions opposite to the directions shown by the arrows) and (e), the S-side and T-side arms 14 and 15 are Guide body 12.15
can move forward by pushing aside the S and T side arms 14 and 15 against the spring force.

The above loading operation is performed by the S side and T side tape guides 12.
and 15 are the S side catcher 16 and the T side catcher 17
The positions are determined and the process ends. As shown in FIG. 2, the loaded magnetic tape 5 comes out from the S-side reel 2, and passes through the tensile run arm 18, the erasing head 19 erected on the S-side arm 14, the S-side impedance roller 20, and the S-side tape guide. It is wound around cylinder 2 via body +2.

Then, the tape passes through the T-side tape guide 15, the T-side impedance roller 21 mounted on the T-side arm 15, the audio control head 22, the capstan 2S, and the pinch roller 24, and is wound around the T-side rail 5. When unloading is performed, the rack drive gear 11 rotates in the direction of arrow T in FIG. 2, and an operation in the opposite direction to that described above is performed.

Figure 5 shows the S-side rack 9 and the S-side rack guide groove 7. At one end is a connecting portion 9a of the S-side tape guide 12.
is provided so that the S-side tape guide 12 is fixed. The rack teeth 9b and the U-shaped cutout 9C are provided over almost the entire length of the S-side rack 9, and the rack teeth 9b mesh with the rack drive gear 11 to prevent the S-side rack 9 from engaging.
to drive. Further, the U-shaped notch 9C is provided to increase the flexibility of the S-side rack 9.

Note that a gap is provided between the S-side rack 9 and the S-side rack guide @7 so that the S-side rack can move smoothly.

In this magnetic tape guide drive device.

Because the movement path of the magnetic tape guide mechanism cannot be uniformly determined due to the arrangement of the racks, there are the following disadvantages.

S from inside the cassette 6 of the S side rack 9 and the T side rack 10,
In order to match the movement paths to the T-side catchers 16 and 17, it is not easy to design the rack guide groove. In addition, even if the moving distance is combined, there is a gap between the rack guide groove and the rack, so the rack storage condition in the rack guide groove differs for each component, and the S side rack 9 and the T side rack 10 This may cause a difference in the distance traveled, making it impossible to obtain a regular driving path.

[Purpose of the invention]

The present invention was made in view of the above situation.
It is an object of the present invention to provide a magnetic tape guide drive device in which the racks on the S, S, and T sides are always stable and a normal running path can be obtained.

[Summary of the invention]

The magnetic tape guide drive device of the present invention includes a rack guide groove in which a supply side rack and a take-up side rack arranged around a rotating cylinder equipped with a magnetic head are guided, and a rack drive gear that drives the rack. A tape guide member that moves in the guide groove and guides the magnetic tape in the cassette is fixed and is disposed between the supply side and take-up side racks, which are made of a flexible material, and the supply side and take-up side racks. , and the above-mentioned rack drive gear meshing with both racks,
The rack gear driving device is configured such that the rack driving gear is movable in the longitudinal direction of the rack while being engaged with the rack, and the rack gear driving device detects the end of loading by the rack driving gear when the tape guide comes into contact with the catcher. and means for controlling the rack gear drive device.

[Embodiments of the invention]

An embodiment of the magnetic tape guide drive device of the present invention will be described below with reference to FIG. 2 shows a plan view of the rack gear drive device. 54 rack gear drive devices, a retaining plate 28, an unam wheel 25 supported by the retaining plate 28 and integrally formed with the rack driving gear 11, and each of the retaining plates 2 and 2 are shown in FIG. The gear 55 is supported by the motor 27.
, 56, and a worm 26 that meshes with the rack drive gear 11. Further, the holding plate 28 is provided with a slide hole 29 formed to have approximately the same curvature as the rack guide groove into which the pin 50 installed in the base 1 is loosely fitted.

In the structure shown in FIG. 4, the rack drive gear 11 is connected to the motor 2.
7, the S-side rack 9 moves in the direction of arrow (B), and the T-side rack 10 is sent in the direction of arrow e→. -・Well, let's assume that the moving distance of the S-side rack 9 is shorter than the moving distance of the T-side rack 10. Therefore, in this case, the S-side tape guide 12
enters the S side catcher +6 and can stop the movement first.

When this movement stops, the rack drive gear 11 continues to be engaged with the S-side rack 9 and rotates while being moved in the direction of the arrow. As the rack drive gear 11 continues to rotate while moving in the direction of the arrow (toward), the rack drive gear 11 is continuously moved in the direction of the arrow e→T.
The side tape guide 15 moves until it enters the T-side catcher 17. That is, the rack gear drive device 54 is connected via the holding plate 28.
can move until it absorbs the difference in the amount of movement between the Sm rack 9 and the T-side rack 10. and,
When the rack drive gear 11 moves after the S side rack 9 stops moving, the holding plate 28 moves with the slide hole 29 as a guide for the pin 50, and even if the rack drive gear 11 moves, the S,
The engagement with the T-side racks 9 and 10 (・ will not come off ℃・ru@) Then, the S-side rack 9 and the T-side rack IO are connected to the S, respectively.
T side catcher + (S that detects entering 5, 17
The power to the motor 27 is turned off by operating the switches on the side and T side. That is, the above-mentioned detecting switch forms a control means for the rack gear drive device. In this embodiment, the moving distance of the S side rack 9 is the T side rack 1.
Since we are talking about the case where the travel distance is shorter than 0, the motor 27 is opened by the switch on the T side. That is, the motor 27 is not stopped by the switch that is opened first of the two switches, but is stopped by the switch that is opened later. Note that if the rack is long on the S side or long on the T side, two switches are required.

This S side switch portion is shown in FIG. The head of the tape guide 520 attached to the S-side tape guide 12 is
When entering the V@ part of the side catcher, press the lever 55 at the upper end.
Press. Since the lever 55 is rotatably supported, it rotates in the direction of arrow (G) against the tension of the spring 55b, and the other end 55C of the lever 55 presses the switch 51a, causing the S-side tape guide 12 to move. The entry into the S side catcher 16 is detected. Incidentally, the T-side switch section (not shown) can similarly detect that the T-side tape guide 1"5 has entered the T-side catcher 17. Then, after detection,
The motor 2 moving the rack drive gear until the tape guide 15 is pressed against the T-side catcher 17 is obtained.
A delay is applied to the circuit so that the power of 7 does not turn off.

In this way, the magnetic tape guide drive device of this embodiment is
The rack gear drive device is configured to be movable in the longitudinal direction of the rack while the rack drive gear is engaged with both racks, and is controlled by detecting the end of loading by the rack drive gear when the tape guide comes into contact with the catcher. Since it is formed in such a manner, a normal traveling path can always be stably obtained without being constructed so as to be able to absorb the difference between the S side rack movement amount and the T side rack movement amount.

〔Effect of the invention〕

As described above, the magnetic tape guide drive device of the present invention has the effect that the racks on the S side and the T side can always have a stable 1, normal running path.

[Brief explanation of drawings]

Figure 1 is a plan view of the currently attempted magnetic tape guide drive device before loading, Figure 2 is a plan view of the device shown in Figure 1 after loading, and Figure 5 is the rack on the S side in Figure 1. FIG. 4 is a plan view of the rack drive section of an embodiment of the magnetic tape guide drive device of the present invention, and FIG. 5 is a perspective view of the S-side switch section of the device shown in FIG. 4. be. 2...S side reel 5...T reel 4...Cylinder 5...Magnetic tape 6...Cassette 7...S side rack guide groove 8...T side hook guide groove 9 ...S side rack 10...T side hook 11...Rack drive gear 12...S side tape guide 15...T@tape guide 16...S side catcher 17...・T side catcher 54...Rack gear drive device, ・-
\. Yo A*! -k d, JII#'<o 10 30 5070 ′Io Open 1L乎(%)
Procedural amendment (method) % formula % Name of the invention Relationship to the case of a person who amends the tape guide of a magnetic recording and reproducing device Name of the patent applicant (5 Kai Co., Ltd., Hitachi Manufacturing)
Attorney Personal procedure amendment (method) Indication of the case 1985 Patent application No. 58502 Name of the invention Person who corrects the tape guide of a magnetic recording and reproducing device Relationship with the person Patent applicant name Ya 45101 Co., Ltd.) E Hitachi
Date of correction order for binding and handling: February 25, 1986 (shipment date)
・−・−・−・・Delete perspective view J. Go to 7.7

Claims (1)

[Claims] 1. A rack guide groove in which the supply side rack and take-up side rack placed around the rotating cylinder equipped with the magnetic head are guided; The above-mentioned supply side and take-up side racks are made of a flexible material and have fixed tape guide bodies for guiding the magnetic tape, and the above-mentioned racks are arranged between the supply side and take-up side racks and engage with both the racks. a rack gear drive device configured to be movable in the longitudinal direction of the rack while the rack drive gear is engaged with the rack; and a rack gear drive device that detects the end of loading by the rack drive gear and drives the rack gear. 1. A drive device for a magnetic tape guide, comprising: means for controlling the device.