JPH0474343A - Tape loading mechanism - Google Patents

Abstract

PURPOSE:To prevent a tape from flawing due to a lead by moving a tape drawing movement body for supporting a tape guide along a guide body. CONSTITUTION:A guide course is formed in advance by the guide bodies 30 and 32 with the tape drawing movement bodies 14 and 16 to make the posture of the tape guides 10 and 12 progress the winding of a tape 2 with its edge along the lead of a drum 8. The is, the tape drawing movement bodies 14 and 16 supporting the tape guides 10 and 12 are guided on the guide bodies 30 and 32 and moved simultaneously. Then, the tape 2 is drawn out of a tape cassette by the tape guides. When the tape 2 is drawn out to a position to be in contact with the drum 8, the tape 2 can be guided by the tape guides 10 and 12 changing the height and inclination of the tape 2 to allow its edge to go along the lead provided on the drum 8. By this method, the tape is thus prevented from flawing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape mounting device, and particularly to a tape mounting device suitable for use in a video tape recorder or the like.

[Conventional technology]

In a cassette type recording and reproducing device such as a video tape recorder, when a tape cassette is attached, the tape in the cassette is pulled out to a predetermined position and wound around a drum, and the tape is run in this state.

The drum, which is provided locally with a head for recording information on the tape and reproducing information recorded on the tape, is provided at an angle with respect to the plane on which the tape cassette is arranged.

When winding a tape around such an inclined drum, the tape is pulled out by a tape guide, and the movement path of this tape guide is such that the tape pull-out member that supports it and this tape pull-out member slide together. It is uniquely determined by the guide body.

Conventionally, the sliding surface of the guide body with the tape pull-out member is a non-flat cam surface, and by sliding the tape pull-out member along the guide body, the attitude of the tape guide is adjusted, and the tape is A tape mounting device that is designed to prevent the tape from falling off the guide is known. This is JP-A-63-2
It is disclosed in Japanese Patent No. 09055.

[Problem to be solved by the invention]

The above-mentioned prior art is preferable in that it controls the winding and storage of the tape while changing the posture of the tape guide so that the tape does not fall off the tape guide, and can reduce damage to the tape.

Incidentally, in order to realize the need to increase the recording time (or playback time) as much as possible, the thickness of the tape itself tends to become thinner and thinner.

However, when the tape thickness becomes thinner, the tape strength decreases extremely. When recording or playing back using a thinner tape like this, there is a risk that the tape may run onto the drum lead and become damaged during winding, or the tape edge may be pressed against the lead side and buckle. There is a problem in that there is a high possibility that the tape will be bent or damaged.

SUMMARY OF THE INVENTION An object of the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a tape loading device that can prevent the tape from being damaged by the lead of the drum when the tape is loaded onto the drum. be.

[Means to solve the problem]

The above purpose is to provide a drum for winding a tape along a lead provided on the outer periphery, a pair of tape guides for pulling out the tape from a cassette and winding it around the drum, and a pair of tape drawer movements that support the tape guides, respectively. and a pair of guide bodies that guide the moving body and control the posture of the pair of tape guides so that the edge of the tape follows the lead as the winding of the tape progresses. ,
After pulling out the first tape guide of the pair of tape guides and moving it horizontally, the second tape guide rotates around the drum while moving upward or downward in the axial direction of the reel of the cassette. , after pulling out the tape,
It moves up and down in the axial direction of the reel of the cassette, and tilts in each of the front, back, left and right directions while substantially maintaining the up and down position, and rotates around the roller axis of the tape guide around the drum. This can be achieved by a tape loading device that rotates.

Further, the first tape guide may rotate around the drum while pulling out the tape and moving horizontally.

[Effect]

According to the above configuration, the tape drawer moving body moves while being guided on the guide body while supporting the tape guide. As a result, the tape is pulled out from the tape cassette while being pulled by the tape guide. When the tape is pulled out to a position where it contacts the drum, the tape guide can guide the tape while changing its height and inclination so that the edge of the tape follows the lead provided on the drum. In other words, as the tape drawer moving body that supports the tape guide moves along the guide body, the tape drawer moving body moves while changing its attitude, and the tape guide moves together with the attitude corresponding to the movement. The guide body, which winds the tape around the drum, forms a guide path with the tape drawer moving body in advance so that the tape guide is positioned so that the edge of the tape follows the lead of the drum while winding progresses. This eliminates problems such as the tape riding on the lead during winding.

〔Example〕

Hereinafter, some embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a cassette-type magnetic recording and reproducing apparatus according to an embodiment of the present invention, showing a state in which the tape is pulled out. The tape 2 is attached to rolls 4 and 6 in a cassette (not shown).
wrapped around. The reproducing device also includes a drum 8 equipped with a head (not shown) for recording and reproducing information.
is rotatably provided. In order to wind the tape 2 around the drum 8, a tape guide 10.12 is arranged on the tape drawer moving body 14.16. In addition, tilt pins 18 and 20 are arranged on the movable bodies 14 and 16, respectively, and move together with the tape guides 10 and 12. Furthermore, erase head 22 and audio head 2
4. A bin 28 is provided for wrapping the tape 2 around the capstan 26 and the like. Furthermore, guide bodies 30 and 32 are arranged on both sides of the rotating drum 8.

FIG. 2 shows a plan view of the pair of guide bodies 30,32. The guide body 3o is provided with a guide groove 34, an attitude control surface 36, 38, and an attitude rotation control groove 40. The guide body 32 is provided with a guide groove 42 and a posture control surface 44 .

The side view of the guide body 32 seen from the direction of the arrow in FIG. 2 is shown in FIG.
It is shown in Figure (a). Further, a side view of the guide body 30 is shown in FIG. 3(b). In this embodiment, the guide body 32 has a surface 46 that is horizontal to the reels 4 and 6, and a tip 48.
A surface 50 that rises smoothly from the horizontal plane as it approaches
have.

The guide body 3o has a surface 52 that is horizontal to the reels 4 and 6.
It has a surface 56 that rises smoothly from the horizontal plane as it approaches the tip 54 and then descends, and a surface 58 that has a step with the surface 56 and has a shape different from that of the surface 56.

FIG. 4 shows another embodiment, which is a modification of the guide body 30°32. A side view of the guide body 32 is shown in FIG. 4(a).
Further, a side view of the guide body 30 is shown in FIG. 4(b). The upper surface of the guide body 32 is horizontal to the reel 4.6. The guide body 3o has a surface 5 that is horizontal to the reels 4 and 6.
2, a surface 56a that smoothly descends from the horizontal surface as it approaches the tip 54, and a surface 56a that has a step with the surface 56a;
It has a surface 58 and the like having a shape different from that of 6a.

FIG. 5 shows the cross section of the guide body 30.32 at positions (a) to (h). Surface 56 (or 56a
), the surfaces 58 and 60 have a step, and this step varies smoothly between (a) and (d). Further, the surface 60 is provided in the groove portion 62 and has a side wall 64.

The guide body 32 has a guide groove 42 and a surface 44.

6 and 7 show the shapes of the tape pull-out moving body 14.degree. 16, the tape guides 10, 12, and the inclined pins 18.degree. 20. The tape guide 10°12 has a flange portion 66.
88 are arranged.

In addition, on the opposite side of the tape pull-out moving body 14.16 from the tape guide, there are attitude control pins 70, 72, 74°76.78.
．． 80 are arranged. Further, guide pins 82 and 84 are provided coaxially with the pin 70.

The guide pin 82 fits tightly into the guide groove 34 and the pin 70.7
2.74 run in contact with attitude control surfaces 56°, 58.60, respectively. Further, the pin 84 engages with the guide groove 42,
The pins 76, 78, 80 run against the attitude control surface 44.

Next, the operation of this embodiment will be explained.

The tape pull-out movable body 14.16 moves along the guide groove 34.42 of the guide body 30.32. At this time, the tape 2 is guided by the tape guide 10.12, pulled out from the reels 4, 6, and wound around the drum 8. FIG. 1 shows the final state in which the tape 2 is wound around the drum 8. When drawing out the tape 2, the tape drawing moving body 14 moves the guide bin 82 into the guide groove 34.
We will work hard together and be guided. Since the guide groove 34 is provided narrower than the attitude control pin 70, the pin 70 is
It moves while contacting the attitude control surface 56 shown in FIG. 5(a). Further, the attitude control pin 74 is arranged longer than the pin 70 so that it can move while contacting the attitude control surface 58. Further, the attitude control pin 72 moves while contacting the attitude control surface 60 and the side wall 64. Guide body 3
As shown in FIGS. 4(a) to 4(d), the attitude control surface of No. 0 is arranged so that the relative positional relationship (height deviation) of the surfaces 56, 58, and 60 differs depending on the position of the guide body. Therefore, the tape drawer moving body 14 changes its posture back and forth and left and right in accordance with the difference in height between the surfaces 56.degree. 58.60. Along with this, the tape guide 10 also changes its posture back and forth and left and right.

Further, since the guide body 30 has a shape as shown in FIG. 3(b) or FIG. 4(b), the tape pull-out moving body 14 moves upward and downward as a whole. . Along with this, the tape guide 10 also changes its height up and down.

The height at this time is set by the attitude control surface 56. Therefore, the tape guide 10 can change its posture as desired while maintaining the height defined by the surface 56. Further, the distance Q between the guide groove 34 and the side wall 64 is arranged differently at each position as shown in FIGS. 5(a) to 5(d). (The change is made smoothly.) Therefore, the tape drawer moving body 14 moves while rotating around the guide pin 82. That is, the tape guide 10 has six tape guides 10 around which rotation can be performed.
A tilted pin 18 is disposed beside the tape, and by rotating this, the tape can be pulled out while controlling the amount of tape wrapped around the tilted pin. Of course, it is also possible not to wrap the tape completely around the tilting pin.

On the other hand, the tape drawer moving body 16 moves on the guide body 32, but this has only one attitude control surface 44, as shown in FIG. 3 (,) or FIG. 4 (8). move only upward or horizontally.

In this way, the tape guide on one side can independently control the posture when pulling out the tape, up and down, right and left, and forward and backward once, and the other tape guide can pull out the tape by controlling only the height. , as shown in FIG.
It can be pulled out and wrapped. This eliminates the generation of excessive force on the tape edges by the leads 86 and flanges 66, 68, thereby eliminating damage to the tape such as edge bending.

〔Effect of the invention〕

As described above, according to the present invention, the tape pulled out by the tape guide is held in an optimal three-dimensional condition so that the tape follows the lead of the drum during the tape drawing process or the tape storage process. It has the excellent effect of preventing scratches on the tape and stabilizing running even with thin tape.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a plan view of the guide body of this embodiment, Fig. 3 is a side view of the guide body, and Fig. 4 is a modified example of the guide body. A side view, FIG. 5 is a cross-sectional view of the guide body in FIG. is a side view, FIG. 7 is a front view of the other moving body, and FIG. 8 is an explanatory diagram of the tape winding operation of this embodiment. 2... Tape, 8... Drum, 10.12... Tape guide, 14.16... Moving object, 18.20...
・Inclination pin, 30.32... Guide body, 34.42...
Guide groove, 44, 56, 58.60... Attitude control surface, 6
6.68...Flange, 70, 72, 74°76.7
8, 80... Attitude control pin, 82.84... Guide pin, 86... Lead. No.

Claims (1)

[Claims] 1. A drum around which a tape is wound along a lead provided on the outer periphery, a pair of tape guides for pulling out the tape from a cassette and winding it around the drum, and a pair of tape guides that respectively support the tape guides. a tape drawer moving body; a pair of guide bodies that guide the moving body and control the postures of the pair of tape guides so that the edge of the tape follows the lead as the winding of the tape progresses; The first tape guide of the pair of tape guides pulls out the tape and moves horizontally, and then rotates around the drum while moving upward or downward in the axial direction of the reel of the cassette. The second tape guide of the pair of tape guides is
After pulling out the tape, it moves up and down in the axial direction of the reel of the cassette, and tilts in each of the front, back, left and right directions while substantially maintaining the up and down position, and is approximately centered on the roller axis of the tape guide. A tape loading device that rotates around the drum. 2. A drum for winding a tape along a lead provided on the outer periphery, a pair of tape guides for pulling out the tape from a cassette and winding it around the drum, and a pair of tape drawer moving bodies for supporting the tape guides, respectively; a pair of guide bodies that guide the movable body and control the posture of the pair of tape guides so that the edge of the tape follows the lead as winding of the tape progresses; A first tape guide among the tape guides pulls out the tape and rotates around the drum while moving horizontally, and a second tape guide among the pair of tape guides is
After pulling out the tape, it moves up and down in the axial direction of the reel of the cassette, and tilts in each of the front, back, left and right directions while substantially maintaining the up and down position, and is approximately centered on the roller axis of the tape guide. A tape loading device that rotates around the drum. 3. At least one of the pair of guide bodies includes a guide surface that controls the vertical movement of the second tape guide, a guide surface that controls the longitudinal or horizontal inclination of the tape guide, and the tape Claim 1: Each guide surface has independently a guide surface for controlling the rotation of the guide substantially about the roller axis.
Or the tape loading device according to 2. 4. At least one of the pair of guide bodies includes a guide surface that controls the longitudinal or horizontal inclination of the second tape guide, and a guide surface that controls the rotation of the tape guide approximately about the roller axis. Claim 1 comprising a guide groove shared with the
Or the tape loading device according to 2. 5. The tape mounting device according to claim 1 or 2, wherein a guide surface for controlling the attitude of the second tape guide is provided on one surface of the guide body.