JPS62132259A - Tape loading mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To specify a shifting quantity with a good accuracy and to further miniaturize a magnetic recording and reproducing device by controlling directly the shifting from the non-operating position of a tape travelling type member such as an impedance roller and an erasing head to the operating position by a cam groove provided at a gear at the time of a tape loading. CONSTITUTION:A loading ring 13 being an annular gear driven by a motor, is arranged at the peripheral surface of a cylinder 2, a gear 36, in which a cam groove 36a is provided at the loading ring, is meshed through a speed reducing gear train 37, and a pin implanted, for example, to the supporting member of an impedance roller 22 is engaged to the cam groove 36a provided at the gear. In accordance with the shifting of a loading means, the impedance roller 22 can be shifted from the non-operating position to the operating position in the condition to suppress the transfer loss of an operating stroke and the occurrence of a dead space as much as possible.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tape loading mechanism of a magnetic recording and reproducing device, and particularly to a magnetic recording and reproducing device that is designed to downsize the magnetic recording and reproducing device and stabilize the loading operation. The present invention relates to a tape loading mechanism.

[Background of the invention]

In conventional magnetic recording and reproducing devices, in order to easily construct the tape loading mechanism into a compact size with a relatively large degree of freedom in design, the impedance is reduced in relation to the operation of the rope ink means that pulls out the tape from the cassette and winds it around the cylinder. Tape transport members such as rollers or erasing heads are moved from non-operating positions to operating positions.

During the loading operation, the impedance roller or the erasing head is temporarily retracted from the moving path of the loading means, and after passing through the loading means.

It moves to a predetermined position and comes into contact with the tape.

As a specific method for moving the impedance roller, etc., 1, for example, as shown in Japanese Patent Publication No. 59-9093, a cam is driven by a motor or the like to obtain the stroke necessary for moving the impedance roller, etc. A method is known in which the stroke is transmitted to the impedance roller or the like via a connecting arm to move the impedance roller or the like. However, if a connecting arm, etc. is interposed between the cam, which is the source of the movement stroke, and the moving target member, such as an impedance roller, the loss of the operating stroke increases, and the movement space of the connecting arm, etc. The problem is that this becomes a dead space and becomes a constraint on downsizing the magnetic recording/reproducing device.

[Purpose of the invention]

An object of the present invention is to solve the above-mentioned problems of the prior art, to stabilize the loading operation with a simple mechanism, and to contribute to the miniaturization of magnetic recording and reproducing devices. is to provide.

[Summary of the invention]

To achieve this objective, one embodiment of the present invention engages a loading means such as a tape pull-out guide.

A loading ring, which is an annular gear driven by a motor, is disposed on the surface of the cylinder, and a gear with a cam groove is meshed with this loading ring through a reduction gear train, and the reduction ratio of this gear train is adjusted. The rotation angle (less than 360 degrees) of the loading ring during the period from the unloading completed state in which the loading means is housed in the opening of the cassette to the loading completed state in which the loading means is held in a predetermined position near the cylinder. ), corresponding to
The gear is selected so that it rotates approximately once, and a pin implanted in the support member of the impedance roller, for example, is engaged with a cam groove provided in the gear, and the impedance roller is moved to the non-operating position according to the movement of the loading means. It is characterized in that it can be moved from the operating position to the operating position while minimizing the transmission loss of the operating stroke and the occurrence of dead space.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of essential parts showing an embodiment of a tape loading mechanism of a magnetic recording/reproducing apparatus according to the present invention, in which 1 is a chassis, 2 is a cylinder, 3 is a tape cassette, 4 is a magnetic tape, and 5 is a supply. Side reel, 6 is winding side reel, 7a
, 7b is a guide pin, 8 is an opening, 9 is a tape guide of the entrance tube 1, 9a is a guide roller, 9b is an inclined pin, 9c is a positioning pin, 9d is a guide base, and 9e is a pressure spring.

9f is a connecting member, 10 is a positioning member, 11 is an entry side cylinder 2
, Ila is a guide roller, 11b is an inclined bin, 11c is a positioning pin, 11d is a guide base,
11e is a compression spring, 11f is a connecting member, 12 is a positioning member, 13 is a loading ring, and 14 is a long hole provided in the longitudinal direction of the loading ring 13. book shaft 16
．． 17 are fitted, thereby making it possible for the base 15 to move along the elongated hole 14 while maintaining a constant posture when attached to the loading ring 13. The connecting member 1 of the tape guide body 11 of the entry tube 2 is connected to a portion of the shaft 16 that protrudes from the upper surface of the loading ring 13.
1f is rotatably attached. Further, 18 is a drive gear that transmits rotational driving force to the loading ring 13;
19 is a tension bin, 20 is a guide bin, 21 is a full-width erasing head, 22 is an impedance roller, 23 is a tape guide on the output side, and 23a is a guide roller.

25b is a positioning pin, 23c is a guide base, 24 is a positioning member, 25.26 is a connecting arm, 27 is a compression torsion spring, 28 is a shaft, 29 is a gear, 30 is a reduction gear train, 31 is a pinch roller, 32 is A capstan, 33 is an auxiliary guide, 34 is a drive arm on which the pinch roller 31 is placed, and 35 is a support member on which the impedance roller 22 is placed, which are held rotatably around the pin 39. 3
6 is a gear provided with a cam groove 36a; 37 is a reduction gear train having a reduction ratio determined so that the gear 36 rotates approximately once in accordance with the rotation angle of the loading ring 15 during the loading period; 5 is an idler gear; 39 is a pin implanted in the impedance roller support member 35 and engaged with the cam groove 36a. Note that the solid line indicates the loading state of the magnetic tape, and the two-dot chain line indicates the unloading state of the magnetic tape.

In the same figure, in the unloading state where the tape cassette 3 is not installed, the tape guide body 9.11.23
and pinch roller 31. Each of the auxiliary guides 33 has position buttons indicated by two-dot chain lines with a dash (L) appended to the reference numeral.

On the other hand, in the tape cassette 3, the magnetic tape 4 is
As shown by the two-dot chain line 4', the guide pin 7a.

It is stretched between the supply side reel 5 and the take-up side reel 6 via 7bi. When this tape cassette 3 is installed as shown, the supply reel 5 and take-up reel 6 are placed on reel stands (not shown) installed on the chassis 1, and the tape guides 9, 11. 23 and pinch roller 31. The auxiliary guide 33 is also arranged inside the magnetic tape 4' in the opening 8.

Then, in response to the instruction to start loading, the loading motor (not shown) rotates and the loading ring 13 is rotated.
is driven. As a result, each tape guide 9.11.
23 moves along a guide groove (not shown) provided on the chassis 1 to a position shown by a solid line. Further, the drive arm 34 rotates and the pinch roller 31. The auxiliary guide 33 also moves to the position shown by the solid line.

FIG. 2 is a partial plan view showing a state in which the impedance roller is retracted to a non-operating position during the loading process described in FIG. 1, and the same reference numerals as in FIG. 1 indicate the same parts.

In the same figure, the impedance roller 22 is
With the passage of the tape guide body 9, it is retracted to the non-operating position. From this state.

As the loading ring 13 rotates in the direction of arrow A,
Reduction gear train 37 and idler gear 3 are respectively indicated by arrow B.
, and the gear 36 provided with the cam groove 36a is rotationally driven in the direction of the arrow.

As a result, the impedance roller support member 35 connected to the cam groove 36a through the engagement pin 39 is rotated clockwise and reaches the operating position shown in FIG. 1, completing the loading operation.

At this time, since the movement timing of the impedance roller 22 can be easily set depending on the shape of the cam groove 56a, the tape guide body 9 of the entry side tube 1,
The setting may be made so that twisting of the tape between the impedance roller 22 and the erasing head 21 is minimized.

In the above embodiment, the case where the impedance roller is moved from the non-operating position to the operating position has been described.
It goes without saying that the present invention can be applied to any member of the tape running system such as an erasing head, a guide pin, or a combination of these members as the member to be moved.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to minimize the transmission loss of the stroke of the tape running system such as the impedance roller and erasing head, and the generation of dead space that occurs to secure the movement space of the connecting arm and the like. The magnetic recording/reproducing device can be further downsized, and the movement of the tape running system member itself is directly controlled by a cam groove provided on the gear, so the amount of movement can be determined with high precision. Therefore, the operating position of the traveling system member can be defined without installing any special positioning means. Furthermore, by configuring the gear provided with the cam groove to rotate approximately once during the loading period, twisting of the magnetic tape that occurs between the loading means and the traveling system member during the loading process can be minimized. It is easy to set the movement timing of the above-mentioned traveling system members, and thereby the loading operation can be stabilized. A tape loading mechanism can be provided.

[Brief explanation of drawings]

# Beyami I Red-4-W Mouth Old R Schiff Tsujihata e1 and 1r Yamajiruho A
FIG. 2 is a plan view of essential parts showing one embodiment of the nib loading mechanism. FIG. 2 is a partial plan view showing a state in which the impedance roller is retracted to a non-operating position during the loading process described in FIG. DESCRIPTION OF SYMBOLS 1... Chassis, 2... Cylinder, 3... Tape cassette, 7a, 7b... Guide bin, 9... Tape guide body of entrance cylinder 1, 1 (112... Positioning member, 1
DESCRIPTION OF SYMBOLS 1... Tape guide of entrance side cylinder 2, 13... Loading ring, 15... Base, 16.17... Shaft. 19... Tensile bin, 20... Guide bin, 2
1... Erasing head, 22... Impedance roller. 23... Output side tape guide body, 31... Pinch roller, 32... Cab stan, 36a... Cam groove, 37
...Reduction gear, 38...Idler gear, 69...
Engagement bin. M2 diagram

Claims (1)

[Claims] It is connected to a loading ring and moves while pulling out the tape from the tape cassette by rotation of the loading ring, and when the loading operation is completed, a tape guide body positioned near the cylinder and a tape guide body that is rotatably supported at a predetermined position are connected. tape running system components such as an impedance roller, an erasing head, and a tape guide pin;
In a loading mechanism of a magnetic recording/reproducing device, the loading mechanism includes a gear having a cam groove and a reduction gear train in which the gear and the loading ring are meshed and connected at a predetermined reduction ratio. A tape loading mechanism for a magnetic recording/reproducing device, characterized in that the traveling system member is moved from a non-operating position to an operating position by utilizing a stroke caused by the rotational movement of the cam groove. .