JPS62204458A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a thin type possible magnetic recording and reproducing device reducing a gap between a tape cassette and a braking member, by providing a window hole having a space enough to fit a reel turntable and the braking member of a tape tension detecting means into a cassette holder. CONSTITUTION:A cassette holder 1 contains a tape cassette 5 loadably and unloadably, and it is moved between a non-operating position where the cassette tape 5 is separated from a reel turntable 2, and an operating position coupled with the reel turntable 2. A window hole 1a is the one having the space enough to fit the reel turntable 2, and the braking member 9 of the tape tension detecting means. A 1b represents a position where the cassette holder 1 is abutted with a cassette holder positioning pin 15, and no descending of the holder is permitted beyond. Thus, since the reel turntable 2 and the braking member 9 of the tape tension detecting means are fitted in the window hole 1a of the cassette holder, it is possible to reduce remarkably a gap H3 between the braking member 9 and the tape cassette 5, and to make the device into a thin type.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette type magnetic recording/reproducing device such as a video tape recorder.

Background of the Invention In recent years, magnetic recording and reproducing devices such as video tape recorders have become much smaller, lighter, and thinner.
Although their popularity is increasing, the demand for smaller, lighter, and thinner devices is growing stronger.

A conventional example will be described below with reference to the drawings.

FIGS. 3 and 4 are schematic diagrams of main parts in a conventional tape loading state. Reference numeral 2 denotes a reel stand, which includes a brake drum 2a and an input gear 2b, and is rotatably supported on a support shaft installed in the main body 3 of the apparatus. Reference numeral 4 denotes a cassette holder that removably stores the tape cassette 6 and moves the tape cassette 6 between an inactive position where it is separated from the reel stand 2 and an active position where it is coupled to the reel stand 2. . 4d is a window hole sufficient to fit the reel stand 2.

Reference numeral 6 denotes a tension arm which is tape tension detection means and is rotatable about a fulcrum 6a.

A post around which the tape 7 is wound perpendicularly to the plane of the paper is installed on the support shaft 6b. Reference numeral 6c denotes a tension spring, one end of which is fixed to the main body 3 of the apparatus in a vertical manner, and applies a rotational force to the tension arm 6 in the direction of arrow a. Reference numeral 8 denotes a first band end which is a part of the tape tension detection means, and is a control member disposed on the outer periphery of the brake drum 2a of the reel stand 2 so as to be able to come into contact with and move away from the outer periphery of the reel stand 2, and for braking the rotation of the reel stand 2. 9 is connected and held in response to the tension arm 6.

The braking member 9 is a part of the tape tension detection means, and is constructed by bonding felt EB to a tension arm 9a. 1o is a second part of the tape tension detection means.
At the band end, one end of the control member 9 is fixed.

Reference numeral 11 denotes a balance kick lever which is a part of the tape tension detection means, to which the second band end is fixed. The balance kick lever 11 is provided with a long hole 11a and a cam portion 11b, and the long hole 11a is connected to the main body 3 of the device.
It is supported movably in the direction of the arrow on a support shaft 12 that is erected on the shaft. Further, the cam portion 11b is configured to be able to move toward and away from the pin 6d set on the tension arm 6.

Reference numeral 13 is a balance kick spring, which is fixed at one end to the balance kick lever and at the other end to the main body 3 of the device, and constantly applies a biasing force to the balance kick lever 11 in the direction of the arrow. Reference numeral 14 denotes an input pin, which is constructed so as to be able to come into contact with the balance gear kick lever 11, and is moved according to various modes.

Reference numeral 16 denotes a cassette holder positioning pin installed in the main body of the apparatus, and prevents the cassette holder 4 from descending to a position below 4b. When the tape cassette 6 is installed, there is normally a gap between the cassette holder 4 and the cassette holder positioning pin 16 as an overstroke during locking so that the locking mechanism (not shown) of the cassette holder 4 can operate completely and smoothly. H1 is provided.

Problems to be Solved by the Invention However, in the above configuration, the braking member 9, which is the tape tension detection means, is not connected to the cassette holder 4.
Since the tape cassette 5 is located below the brake member 9, it is necessary to provide a gap H2 between the tape cassette 5 and the braking member 9, taking into consideration the overstroke H1 during locking. Therefore, small size.

Even in a lightweight and thin magnetic recording/reproducing device, the gap H2 is necessary, and there has been a problem in that it is impossible to reduce the gap H2 and make the magnetic recording/reproducing device thinner.

In view of the above problems, the present invention provides a window hole sufficient to fit the reel stand and the braking member of the tape tension detection means in the cassette holder, thereby extremely reducing the gap H2 between the tape cassette and the braking member. The present invention provides a magnetic recording/reproducing device that can be made thinner.

Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic recording and reproducing apparatus of the present invention includes a reel stand including a brake drum, and a reel stand that is disposed on the outer periphery of the brake drum so as to be able to move toward and away from the outer periphery of the brake drum. a tape tension detection means including a braking member for braking the rotation of the reel stand; a tape cassette is removably housed therein; and the tape cassette is placed in a non-operating position separated from the reel stand and in the reel stand. A cassette holder is provided that is moved between the combined operating position and the reel stand and the braking member of the tape tension detection means are fitted into the cassette holder while the cassette holder is located at the operating position. The structure is such that sufficient window holes are provided.

According to the above-described configuration, the braking member of the tape tension detection means can be fitted into the window hole of the cassette holder, so the gap between the tape cassette and the braking member can be reduced, and the thickness can be reduced. can be further promoted.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings, using an example in which the present invention is applied to a video tape recorder.

FIG. 1 is a plan view showing a schematic configuration of essential parts of an embodiment of the present invention in a tape loading state.

FIG. 2 is a side view showing a schematic configuration of main parts in the same state.

Components that are the same as those explained in FIGS. 3 and 4 are given the same reference numerals, and redundant explanation will be omitted.

Reference numeral 1 designates a cassette holder that removably houses the tape cassette 5 and moves the tape cassette 6 between a non-operating position where it is separated from the reel stand 2 and an operating position where it is connected to the reel stand 2. .

1a is the reel stand 2 and the braking member 9 of the tape tension detection means;
The window hole is large enough to fit the 1b, the cassette holder 1 contacts the cassette holder positioning pin 16,
Indicates the position below which it will not descend.

As described above, according to this embodiment, since the reel stand and the braking member of the tape tension detection means are fitted into the window hole of the cassette holder, the gap H between the braking member and the tape cassette is
3 can be made extremely small and thin. Further, there is an advantage that the gap H1 between the cassette holder and the cassette holder positioning pin, that is, the gap H3 is determined regardless of the overstroke during locking.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts of an example of a video tape recorder embodying the present invention, FIG. 2 is a side view of essential parts of the same embodiment, and FIG.
The figure is a plan view of the main part of the conventional example, and FIG. 4 is a side view of the main part. 1...Cassette holder, 1a...Window hole, 2...Reel stand, 2d...Brake drum, 6...Tape cassette, 6...
...Tension arm, 6b...Tension arm, 6C...Tension/spring, 6d...
...Pin, 8...1st band end, 9
...Control tll material, 9a...Tensiran band, 9b...Felt, 10...
2nd band end, 12... Ten leg kick lever. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4

Claims (1)

[Claims] A reel stand including a brake drum, a tape tension detection means including a braking member disposed movably toward and away from the outer periphery of the brake drum and for braking the rotation of the reel stand, and a tape cassette to be attached and detached. possible to store, and
a cassette holder for moving the tape cassette between a non-operating position where the tape cassette is separated from the reel stand and an operating position where the tape cassette is coupled to the reel stand; A magnetic recording/reproducing apparatus characterized in that a window hole sufficient to fit the reel stand and the braking member of the tape tension detecting means is provided in the magnetic recording/reproducing apparatus.