JPH06309747A - Magnetic device - Google Patents

Abstract

PURPOSE:To miniaturize the device in thickness by disposing a rotary tape guide and at least two inclined tape guides in turn from the head cylinder side on the tape take-up side. CONSTITUTION:A tape wound on a head cylinder H can be brought back to a prescribed position without distorting or twisting the tape via the rotary tape guide and at least two inclined tape guides 52 and 54 in the magnetic device. That is, the tape wound on the head cylinder H is raised in height by the rotary tape guide 50, and the tape is corrected in the direction of its side by at least two inclined tape guides 52 and 54, so as not to distort or twist the tape. In this case, a projecting amt. of a corner part of the head cylinder H can be diminished to the utmost, thus miniaturizing the recording and reproducing device in reducing its thickness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention reproduces information recorded on a tape in an 8 mm VTR or the like,
Alternatively, the present invention relates to a magnetic device including a head cylinder capable of recording / reproducing information on / from a tape.

[0002]

2. Description of the Related Art In a magnetic device such as an 8 mm VTR, a head cylinder having a standard diameter or a head cylinder having a diameter smaller than the standard diameter is used for reproducing information on a tape or recording information on the tape according to a conventional format. I'm using it.

This standard diameter head cylinder is a head cylinder as shown in FIG. 7, and has a diameter of 40 mm, for example. The small-diameter head cylinder is a head cylinder as shown in FIG. 8, and has a diameter of 26.6 mm, for example.

In general, when the 8 mm VTR is used as a portable machine such as a camera-integrated type, a reduction in the outer size of the entire 8 mm VTR has increased the commercial value, and therefore a mechanical device mounted inside the 8 mm VTR is used. It is important to devise the layout of components to promote miniaturization. For this reason, the small-diameter head cylinder 2 of FIG. 8 is employed because it is relatively easy to downsize the entire 8 mm VTR.

However, this small-diameter head cylinder 2 has a drawback in that it is theoretically impossible to record / reproduce PCM sound defined by the format. That is, as shown in FIG. 8, when attempting to record / reproduce PCM sound by using the head cylinder 2 having a small diameter,
In the head cylinder 2 having a small diameter, for example, a winding angle of 331.5 ° is required, and as shown in FIG. 8, the tape guide 4 on the tape pull-out side and the tape guide 3 on the tape take-up side are geometrically arranged as shown in FIG. Will interfere. Therefore, it is difficult to construct a tape path that satisfies all formats by using the head cylinder 2 having a small diameter.

On the other hand, in the standard diameter head cylinder 1 of FIG. 7, a winding angle of at least 221 ° is required to satisfy the format, but all recording / reproduction on the format is required. It is possible, and the head cylinder 1 having this standard diameter can be adopted.

[0007]

By the way, when a tape recording / reproducing apparatus is constructed using the head cylinder 1 having the standard diameter, for example, an M type tape path as shown in FIG. 9 is constructed. The M-shaped tape path is composed of tape guides 5 and 6 on the tape pull-out side, tape guides 7 and 8 on the tape take-up side, and a head cylinder 1.

When this standard diameter head cylinder 1 is used, in order to minimize the plane projection area of the tape recording / reproducing apparatus and to reduce the size, as shown in FIG. 9, the standard diameter head cylinder 1 is used as a cassette. It is conceivable to reduce the size by inserting the tape C inside, that is, below the cassette lid (not shown).

However, since the position of the cassette lid is fixed, unless the mounting tilt angle of the head cylinder 1 is made as small as possible and the plane of rotation of the head cylinder 1 is made substantially horizontal, as shown in FIG. The corner portion P1 of the cylinder 1 largely projects downward along the thickness direction (vertical axis VL direction).

FIGS. 7 and 9 show the case of using the above-mentioned M type tape path having the inclined guides 5 and 7 on the tape pull-out side and the tape take-up side, respectively, which has been adopted in VHS and DAT. If the mounting inclination angle θ formed by the rotation center axis CL of the head cylinder 1 and the vertical axis VL is not large, for example, about 15 degrees, this tape path will not be geometrically established.

As described above, if the mounting inclination angle θ is set to be large, for example, about 15 degrees, the corner portion P1 of the head cylinder 1 projects downward as described above, and the thickness of the mechanism of the recording / reproducing apparatus. Cannot be reduced in the direction of the arrow X, that is, in the vertical direction in FIG. Therefore, increasing the mounting inclination angle θ of the head cylinder 1 to around 15 degrees, for example,
This is inappropriate for downsizing the recording / reproducing apparatus in the thickness direction. Therefore, it is necessary to reduce the mounting inclination angle of the head cylinder to reduce the thickness of the recording / reproducing apparatus.

The present invention has been made in order to solve the above-mentioned problems, and even if a head cylinder having a diameter capable of all recording / reproducing in a format is adopted, the recording / reproducing device or the mechanism of the reproducing device is adopted. An object of the present invention is to provide a magnetic device that can be downsized in the thickness direction.

[0013]

According to the present invention, there is provided a magnetic device having a head cylinder for reproducing information recorded on a tape or for recording and reproducing information on a tape. This is achieved by a magnetic device having a structure in which a rotating tape guide and at least two inclined tape guides are arranged on the winding side in this order from the head cylinder side.

Further, in the present invention, preferably, the rotating tape guide is inclined, and the at least 2 is provided.
The two inclined tape guides are fixed tape guides.
Further, in the present invention, an inclined tape guide is preferably arranged also on the pull-out side of the tape.

[0015]

The tape wound around the head cylinder can be returned to a predetermined position through the rotating tape guide and the at least two inclined tape guides without twisting or twisting the tape. The predetermined position is, for example, a position in the tape cassette. That is, the rotating tape guide raises the height of the tape wound around the head cylinder, and the at least two inclined tape guides reorient the surface of the tape to prevent the tape from being twisted or twisted. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

FIG. 1 shows a recording / reproducing apparatus as a preferred embodiment of the magnetic apparatus of the present invention, and this recording / reproducing apparatus is preferably 8 mm VTR. 2 is a perspective view showing the recording / reproducing apparatus of FIG.

In FIGS. 1 and 2, the chassis 10 includes
The head cylinder H is rotatably mounted via a mounting part (not shown). This head cylinder H
Can be rotated by a motor (not shown).

The cassette C is set in a predetermined position of the chassis 11 shown in FIG. 3 by a cassette loading device (not shown) by moving in the direction of arrow X in FIG. 1 to the state shown in FIGS. To be done. In this state, the cylinder head H is positioned so as to enter near the inside of the cassette C of the tape T in order to reduce the outer size in the vertical direction on the paper surface of FIG.

In the state of being loaded in the state of FIG. 1, the tape T is pulled out from the inside of the cassette C by a tape loading device (not shown), and recording / reproduction can be performed in accordance with a predetermined format. for,
It can be wound around the peripheral surface of the head cylinder H. This tape T is a capstan 6
It is sandwiched between 0 and a pinch roller (not shown), and the tape T is conveyed by the rotation of the capstan 60.

As shown in FIG. 1 in particular, the tape T is designed to run along a tape path that is substantially M-shaped when seen in a plane, that is, the running path of the tape. This tape path is formed by a plurality of tape guides respectively arranged on the tape pull-out side TP and the tape winding side TR, and a capstan 60 arranged on the tape winding side TR, which will be described below.

The large circle LC and the small circle SC indicated by the alternate long and short dash line on the tape pull-out side TP respectively show a state in which the tape T has not been pulled out and a state in which the tape T has been pulled out. Similarly, the large circle LC1 and the small circle SC1 indicated by the alternate long and short dash line on the tape winding side TR respectively show a state in which the tape T is almost wound and a state in which the tape T is hardly wound. .

First, the tape guide on the tape pull-out side TP will be described with reference to FIGS. The tape pull-out side TP corresponds to the tape pull-out side reel 30 and includes tape guides 20, 22, 24, and 26. The tape guide 20 has a smaller diameter than the tape guides 22 and 24. The tape guide 22 has a larger diameter than the tape guide 24. Tape guide 2
0 has its axis L1 perpendicular to the chassis 10. In addition, the axis L2 of the tape guide 22 is also the chassis 10
Perpendicular to. Further, the axis L of the tape guide 24
3 is also perpendicular to the chassis 10.

However, the tape guide 26 has its axis L4 inclined, as is particularly shown in FIGS. 1, 3 and 4. The axis L4 of the tape guide 26 is set to be tilted by a certain angle in a certain geometrically determined direction. The tape T is wound around the head cylinder H in the same way as the so-called M-shaped tape path in which the tape plane can be easily returned to the tape plane in the cassette by winding the tape around the tape guide 26. It is possible to return from the flat surface to the tape flat surface in the cassette C.

Next, the head cylinder H will be described. The head cylinder H of FIGS. 1 to 3 is, for example, a standard diameter head cylinder and has a diameter of 40 mm. The head cylinder H is a head cylinder capable of all recording / reproducing in a format including recording / reproducing of PCM sound and the like.

The rotation center axis LO of the head cylinder H of FIG.
Are inclined with respect to the vertical axis VL at an angle of a predetermined mounting inclination angle A, and can be rotated by a motor (not shown). This vertical axis VL is the chassis 10
And orthogonal to the chassis 11. The inclination angle A is, for example, about 7 °.

This inclination angle A is smaller than that in the case where the conventional M-type tape path is adopted so that the head cylinder H can be efficiently inserted inside the cassette C in order to achieve the miniaturization of the entire recording / reproducing apparatus. The angle is preferably less than half. As a result, as shown in FIG. 3, the protrusion amount D of the corner portion P1 of the head cylinder in the vertical direction X can be reduced. Therefore, the width W of the recording / reproducing device along the vertical direction X can be reduced.

Next, the respective tape guides and capstans on the tape winding side TR shown in FIGS. 1 and 2 will be described.

As shown in FIGS. 1 and 2, the tape winding side TR corresponds to the tape winding side reel 40.
On the tape winding side TR, the rotating tape guide 5
0, tape guides 52, 54, 56 and a capstan 60.

The rotating tape guide 50 is a tape guide that rotates as the tape T runs. The rotating shaft L5 of the rotating tape guide 50 is inclined in a certain direction by a certain angle. Also, the tape guides 52, 54, 56
Is preferably a fixed tape guide that does not rotate.

As shown in FIG. 4, the axis L6 of the tape guide 52 is inclined in a fixed direction by a fixed angle. Further, the axis L7 of the tape guide 54 is also inclined in a certain direction by a certain angle. Further, the central axis L8 of the tape guide 56 is perpendicular to the chassis 10. That is, FIG.
Is parallel to the vertical axis VL of. Further, the axis L9 of the capstan 60 is also parallel to the axis L8 of the tape guide 56.

Rotating tape guide 50 and tape guide 5
Rotating tape guides 50, tape guides 52, and tape guides 54 are arranged in the order 2, 54 from the head cylinder H side in the order shown in FIG.

In this embodiment, since the mounting inclination angle A of the head cylinder H is set to a small value, for example, about 7 degrees, in order to secure a predetermined required winding angle, as shown in FIG. The T itself is wound while being inclined with respect to the outer peripheral surface SH of the head cylinder H. Therefore, if it is attempted to guide the tape T on the tape take-up side TR by the same M-type tape path method as that on the tape pull-out side TP, a space that serves the purpose of downsizing the recording / reproducing apparatus is achieved. Within the region, it is geometrically impossible to return the tape plane corresponding to the reel 40 on the tape winding side.

One of the causes is that the height when the tape T is detached from the outer peripheral surface SH of the head cylinder H on the tape winding side TR as compared with the height position of the cassette C as shown in FIG. This is because it is in a low position. Further, as shown in FIG. 5, the detaching direction of the tape T wound around the outer peripheral surface SH of the head cylinder H is downward in the head cylinder H along the arrow Y1 direction.

In order to solve this, first, after the tape T is detached from the outer peripheral surface SH of the head cylinder H, the tape T is wound by a certain angle by a first rotating tape guide 50 as shown in FIG. The direction in which the height of the cassette C is changed to a direction in which the difference from the height of the cassette C is reduced.

Next, as shown in FIG. 3, the plane of the tape T is set by the two tape guides 52 and 54 which are set to be tilted by a certain angle in a certain geometrically determined direction. Is the position B1 of the plane in the cassette C.
Can be returned to.

As described above, the inclination angle A of the head cylinder H shown in FIG. 3 is set small, and the thickness W of the recording / reproducing apparatus is set.
In the case of reducing the size to make the size smaller, the position of the tape T on the tape winding side TR in FIG. 1 is lower than the position of the cassette C.

That is, there is a drawback in that the position of the tape T near the rotary tape guide 50 is lower than that of the cassette C, but due to the rotary tape guide 50 and the two inclined guides 52 and 54, The position of the plane of the tape T can be forcibly returned in a diagonally upward direction to a predetermined intermediate position B1 in the cassette C as shown in FIG.

Next, the geometric conditions of the tape guide when the tape path is constructed in the above-mentioned embodiment will be described. The geometric conditions of the tape guide 26 that is the tilt guide on the tape pull-out side TP in FIG. 1, that is, the tilt angle and direction of the axis L4 of the tape guide 26 are the height of the head cylinder H and the mounting tilt angle A of the head cylinder H,
That is, it is uniquely determined by the spatial position of the head cylinder H.

The spatial position and winding angle of the rotary tape guide 50 and the inclined tape guides 52, 54 on the tape take-up side TR are either the spatial position of the head cylinder H or one of the three tape guides. It is uniquely determined when the two spatial positions are determined.

Therefore, the three tape guides 50, 52,
Up to two of 54 can be freely set within a range that does not affect downsizing of the recording / reproducing apparatus shown in FIG.

Further, on the tape pull-out side TP of FIG. 1, if the tape guide 24 is located on the extension line of the tape T from the tape guide 26 to the tape guide 24, the tape guide to the subsequent cassettes C. 22, 2
There is no limit to the number of tape guides or winding angles set vertically such as 0.

Similarly, on the tape winding side TR, if the capstan 60 is located on the extension line of the tape T from the tape guide 54 toward the capstan 60, the tape guide 56 of the tape guide 56 up to the cassette C thereafter. There is no limit to the number of tape guides or wrap angles that are set vertically.

Therefore, in a tape path in which the head cylinder H is set or installed substantially horizontally such that the M-shaped tape path is geometrically impossible, the tape path configuration in the embodiment of the present invention, that is, the tape pull-out side If one inclined tape guide 26 is set in TP, one rotating tape guide 50 is set in order on the tape winding side TR, and at least two inclined tape guides 52, 54 are set, the above-mentioned degrees of freedom can be obtained. You can configure a tape path with.

Further, in the above embodiment, the rotation plane of the standard type head cylinder H is set so as to be substantially close to the plane of the chassis 10 and 11, and the corner portion P of the head cylinder H is set.
The protrusion amount D of 1 can be minimized. Therefore, the thickness of the recording / reproducing apparatus such as the 8 mm VTR can be reduced and the size can be reduced. For this reason, a recording / reproducing apparatus such as an 8 mm VTR which adopts a standard type head cylinder H, has an 8 mm VTR which adopts a small diameter head cylinder.
It is possible to make it as large as a recording / reproducing apparatus such as TR. Further, since a standard type head cylinder can be adopted, all recording / reproduction of the 8 mm format is possible.

The present invention is not limited to the above embodiment. In the above embodiment, the tape recording / reproducing apparatus such as the 8 mm VTR has been described as an example, but the present invention is not limited to this, and the present invention can also be applied to a tape reproducing apparatus.

Further, it is sufficient to arrange a rotating tape guide and at least two inclined fixed tape guides in order from the head cylinder side on the winding side of the head cylinder, and even if other tape guides are additionally arranged, It belongs to the scope of the invention.

[0048]

As described above, according to the present invention,
Even if a head cylinder having a format-like diameter capable of recording and reproducing is adopted, the recording and reproducing apparatus or the mechanism of the reproducing apparatus can be downsized in the thickness direction.

[Brief description of drawings]

FIG. 1 shows a magnetic device according to a preferred embodiment of the present invention.
The top view which shows the recording / reproducing apparatus of a milli VTR.

FIG. 2 is a perspective view showing the recording / reproducing apparatus shown in FIG.

3 is a side view showing a positional relationship between a head cylinder and a plurality of tape guides around the head cylinder in the recording / reproducing apparatus of FIG. 1, and a guide state of a tape by these tape guides.

FIG. 4 is a view corresponding to FIG. 3 showing only each tape guide.

FIG. 5 is a diagram showing a moving direction of a tape.

FIG. 6 is a diagram showing a moving direction of a tape.

FIG. 7 is a diagram showing an example using a conventional standard head cylinder.

FIG. 8 is a diagram showing an example using a conventional small-diameter head cylinder.

FIG. 9 is a plan view showing a conventional VTR magnetic recording / reproducing apparatus.

[Explanation of symbols]

 10 chassis 20 tape guide 22 tape guide 24 tape guide 26 tape guide 30 tape reel reel 40 tape take-up reel 50 rotating tape guide 52 inclined tape guide 54 inclined tape guide 56 tape guide 60 capstan C cassette H head cylinder L1, L2, axis L3, L4, axis L5, L6, axis L7, L8 axis LO central axis of rotation of head cylinder T tape TP tape pull-out side TR tape take-up side

Claims (3)

[Claims] 1. A magnetic device comprising a head cylinder for reproducing information recorded on a tape or for recording and reproducing information on a tape, comprising: a rotating tape guide on the winding side of the tape in order from the head cylinder side. And a magnetic device having a configuration in which at least two inclined tape guides are arranged. 2. The magnetic device of claim 1, wherein the rotating tape guide is tilted and the at least two tilted tape guides are fixed tape guides. 3. The inclined tape guide is arranged also on the pull-out side of the tape.
The magnetic device according to 1.