JPH06162611A - Tape deck - Google Patents

Abstract

PURPOSE:To stabilize running of a tape and to lessen the damage of the tape by making it possible to adjust the irregularity of the tension of the tape. CONSTITUTION:The tape deck is provided with a deck chassis 2 which has a rail 1 for sliding and guiding a guide body 7. A guide roller 5 for winding a tape 3 around a head cylinder 4 and a post 6 are erected in the guide body 7. An adjusting member 9 is set in the vicinity of a terminal end of the rail 1 of the deck chassis 2 so as to adjust the tension of the tape by pressing the side face of the guide body. Accordingly, the relative position of the post 6 to the cylinder 4 is finely adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a tape deck,
For example, the present invention relates to a tape deck which is incorporated in a tape recorder or the like for recording and / or reproducing by mounting a video cassette, an audio cassette, a digital recording cassette, or the like, and which can adjust the tape tension.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 4, a tape deck 40 of a video tape recorder has a supply reel shaft 42 which engages a supply reel in a video cassette 41 and a take-up reel shaft 43 which engages a take-up reel. And a head cylinder 45 for winding the tape supplied from the video cassette 41 and recording or reproducing the tape. On the deck chassis 48 on both sides of the head cylinder 45, a pair of guide bodies 46 and 47 for winding the tape around the head cylinder 45 are loosely fitted to the mounting position of the video cassette so that sliding guide is possible. 49 is formed. 51 is an erasing head, 52 is a voice head, 53 is a capstan shaft, 54 is a pinch roller, 56 is a mode switching mechanism, and the mode switching mechanism 56 reciprocates the mode lever 57 to play, fast-forward, and rewind. Switch to mode, stop mode, etc.

In the conventional tape deck 40, the guide body 4
A guide roller 58 and a post 59 are erected on the guide rails 6 and 47, and the guide bodies 46 and 47 move to the terminal position 50 of the guide rail 49 while sliding on the guide rail 49.
The tape is configured to be set at a predetermined position of the head cylinder 45 by changing the traveling direction (angle) by the inclination of the post 59.

[0004]

However, in such a conventional tape deck 40, since the guide roller 58 and the post 59 are fixed to the guide bodies 46 and 47, the deck chassis is operated during the operation such as reproduction or recording. It is difficult to adjust the angle of the guide roller 58 and the post 59 with respect to 48. Therefore, when the tape tension with respect to the post 59 varies vertically (both ends in the tape width direction), there are problems that the tape running becomes unstable and the tape is damaged.

The present invention has been made in view of such conventional problems, and by providing an adjusting member that allows the guide body to rotate, it is possible to adjust the variation in the tension of the tape and stabilize the tape running. It is an object of the present invention to provide a tape deck that can reduce the damage of the tape and damage to the tape.

[0006]

SUMMARY OF THE INVENTION A tape deck of the present invention comprises a deck chassis having a guide roller for winding a tape around a head cylinder and a rail for slidingly guiding a guide body on which posts are erected. In the above, the adjusting member for pressing the side surface of the guide body to adjust the tape tension is provided near the rail of the deck chassis.

[0007]

According to the present invention, the position of the post relative to the head cylinder is finely adjusted by the pressing of the side surface of the guide body by the adjusting member even during an operation such as reproduction or recording in the adjustment (inspection) step during manufacturing. , The adjustment of the tension variation of the tape underlay or underlay on the post is adjusted.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a video tape recorder to which an embodiment of a tape deck according to the present invention is applied. First,
The configuration will be described. The configuration is the same as that shown in FIG. 4 except that shown in FIGS. In FIG. 1, reference numeral 1 denotes a guide rail which is a rail provided on a deck chassis 2, and a guide roller for winding a tape 3 supplied from a video cassette (not shown) on a rotatable head cylinder 4 on the guide rail 1. A guide body 7 on which 5 and an inclined post 6 are erected is slidably guided via an engagement portion 8 on the back side.

Reference numeral 13 is an erasing head, and 14 is a tape tension lever. A tape tension post 15 attached to the tip of the tape tension lever 14 is pressed against the tape 3 running between a guide roll 16 and a fixed post 17. The tape tension is applied to the tape. A base end portion of the tape tension lever 14 is pivotally attached to the deck chassis 2 by a pivot shaft 18. In the vicinity of the pivot 18 of the tape tension lever 14, one end of a tension band 20 half-supported by the supply reel 19 is fixed, and the other end is connected to a tension adjusting lever 22 fixed to the deck chassis 2. There is.
On the other hand, a tension spring 25 is stretched between the base end of the tape tension lever 14 and the end of a tension arm 24 pivotally attached to the back surface of the deck chassis 2 via a pivot 23. The tension of the tension spring 25 is adjusted by the cam surface 27 provided on the mode lever 26 made of synthetic resin.
The cam follower pin 2 provided on the tension arm 24
The rotation of the tension arm 24 due to the follow-up of 8 is regulated.

As shown in FIGS. 2 and 3, the side surface of the guide body 7 remote from the engaging portion 8 is pressed against the deck chassis 1 near the terminal end portion (upper end portion in FIG. 1) of the guide rail 1. An adjusting member 9 is provided which is capable of slightly rotating the guide body 7 around the engaging portion 8. The adjusting member 9 is made of a synthetic resin member formed by outsert molding, and has a disc-shaped eccentric piece 11 that contacts the surface of the deck chassis 2.
And an eccentric shaft 10 that is integrally formed below the eccentric piece 11 at a position eccentric from the center and is rotatably provided on the deck chassis 2. An engaging groove 12 into which a tool such as a driver is engaged is formed on the upper surface of the eccentric piece 11 to enable the above-described rotation. When the eccentric shaft 10 engages with a tool such as a screwdriver through the engaging groove 12 and is rotated, the circular eccentric piece 11 is rotated about the eccentric shaft 10 at the eccentric position as shown by an arrow A, and It can be fixed to the deck chassis 2 at the rotating position. At this time, the eccentric piece 11 is rotatable on the outer peripheral surface of the guide body 7 about the engaging portion 8 as shown by an arrow B.

Next, the operation will be described. In the present invention, the deck chassis 2 near the terminal end of the guide rail 1
Since the adjusting member 9 is provided in contact with the side surface of the guide body 7, a driver is engaged with the engaging groove 12 of the adjusting member 9 to rotate the eccentric piece 11 about the eccentric shaft 10 to cause eccentricity. The guide body 7 is pressed by the outer peripheral surface of the bridge 11, and the guide body 7 is rotated by the pressing force, whereby the post 6 and the head cylinder 4 are
The position relative to
The variation in tension of the upper or lower lining is adjusted. The tension of the tape 3 can be adjusted by the adjusting member 9 while the tape deck is operated for reproduction or recording. Therefore, the tape running can be stabilized and the damage of the tape can be significantly reduced.

The adjusting member 9 includes an eccentric shaft 10 and an eccentric piece 1.
Not only in the case of being constituted by 1, but for example, an arc-shaped plate cam is pivotally attached to the deck chassis 2 by a pivot,
You may make it press the side surface of the guide body 7 moved near the terminal part of the rail 1.

[0013]

As described above, according to the tape deck of the present invention, the relative position of the post with respect to the head cylinder can be finely adjusted by the rotation of the guide body by the pressing of the adjusting member, and the tape on the post can be adjusted. It is possible to adjust the variation in tension of the tension or underlay. Therefore, it is possible to greatly stabilize the tape running and significantly reduce the tape damage.

[Brief description of drawings]

FIG. 1 is a plan view in which a part of a video tape recorder to which an embodiment of a tape deck according to the present invention is applied is omitted.

FIG. 2 is a plan view of a main part of the video tape recorder shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a plan view showing a conventional tape deck.

[Explanation of symbols]

 1 rail (guide rail) 2 deck chassis 3 tape 4 head cylinder 5 guide roller 6 post 9 adjustment member

Claims (1)

[Claims] 1. A tape deck including a deck chassis having a guide roller on which a tape is wound around a head cylinder and a guide body in which posts are erected, and a rail is provided in the vicinity of the rail of the deck chassis. A tape deck comprising an adjusting member for pressing the side surface of the guide body to adjust the tape tension.