JPH0725879Y2 - Auxiliary loading mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention is used in a rotary head type magnetic recording / reproducing apparatus having an automatic cueing function for detecting the duty modulation of a control signal to cue the tape and a lap counter function. And an auxiliary loading mechanism that is used.

2. Description of the Related Art Conventionally, at the time of fast-forwarding and rewinding a tape in a rotary head type magnetic recording / reproducing apparatus (hereinafter referred to as recording / reproducing apparatus), a magnetic tape is pulled out from a cassette loaded in the recording / reproducing apparatus by moving and driving an auxiliary loading post. ,
An auxiliary loading mechanism for contacting the head for voice and control signals is disclosed in Japanese Patent Laid-Open No. 59-112460.

Further, in the auxiliary loading mechanism A shown in FIGS. 3 to 5, the magnetic tape 2 is pulled out from the cassette 1 loaded in the recording / reproducing apparatus as shown in FIG. An auxiliary loading post 4 for contacting the control signal head 3 is planted at the tip of the auxiliary loading arm 5.

The tape is pulled out by swinging the auxiliary loading arm 5 around the shaft 5a.

In order to accurately determine the pulling-out position of the tape, the auxiliary loading arm 5 is conventionally divided into two parts, and when the screw 8 connecting both arms is tightened, the bending angle of both arms is adjusted.

Reference numeral 6 is a drive shaft for swinging the auxiliary loading arm 5.

Auxiliary loading mechanism A configured as described above
In the recording / reproducing apparatus (see FIG. 3) equipped with the tape pull-out pins 9 and 10, the arrows 9'and 1
When the magnetic tape 2 is driven to move in the 0'direction, the magnetic tape 2 engages with the tape pull-out pins 9 and 10 and is pulled out from the cassette 1, and a head cylinder 11 having a rotary head therein.
Is wound around the head cylinder 11 by a predetermined angle, and the erasing heads 12 and the voice and control signal heads 3 disposed on both sides of the head cylinder 11 are wound around a predetermined angle.
4. Contact the fixed post 15.

On the other hand, at the time of fast-forwarding and rewinding the tape, as shown in FIG. 3, the auxiliary loading post 4 is swingably driven around the shaft 5a toward the voice / control signal head 3 side, whereby the magnetic tape is moved. Reference numeral 2 engages with the auxiliary loading post 4, is pulled out from the cassette 1, and contacts the voice / control signal head 3;
It is wound at a predetermined angle.

The position at which the auxiliary loading post 4 is oscillated and stopped so that the winding angle of the magnetic tape 2 with respect to the voice / control signal head 3 is always constant, and the voice / control signal head 3 is positioned.
The positional relationship with the mounting position is determined in advance when the recording / reproducing apparatus is assembled.

Therefore, in the conventional auxiliary loading mechanism A, when the position adjustment of the mounting position of the voice / control signal head 3 is performed in the arrow 17 direction,
It was also necessary to adjust the mounting position of the auxiliary loading post 4 by the screw 8.

Purpose of the Invention The present invention was created in view of the above circumstances, and by changing the structure of the auxiliary loading mechanism, even if the position of the mounting position of the head for voice and control signals is adjusted, An object of the present invention is to provide an auxiliary loading mechanism capable of keeping the winding angle of the magnetic tape around the voice / control signal head constant at all times without adjusting the mounting position of the loading post.

In order to achieve the above-mentioned object, the main means adopted by the present invention is the gist of the present invention, which is mounted on the magnetic recording / reproducing apparatus at the time of fast-forwarding and rewinding the tape of the rotary head type magnetic recording / reproducing apparatus. An auxiliary device provided with a drive mechanism for swinging and supporting the loading arm having a loading post for pulling out the magnetic tape from the cassette and bringing it into contact with the voice / control signal head toward the voice / control signal head side. In the loading mechanism, the loading arm includes a first loading arm having the loading post implanted at one end and a second loading arm having one end connected to the driving mechanism, and the loading arm is provided on the same axis. It supports the head for voice and control signals so that it can swing freely, The first loading arm and the second loading arm are engaged with each other so as to restrict the swinging of the first loading arm with respect to the moving arm toward the voice and control signal head side, and the first loading arm is engaged. One end of the torsion coil spring for urging the arm and the second loading arm in the mutually engaging direction is connected to the first coil.
The other end of the first loading arm is locked to the second loading arm, and when the first and second loading arms are swung toward the voice and control signal heads, the first loading arm A point positioning mechanism for stopping the loading post at a predetermined position with respect to the voice / control signal head by bringing the tip of the arm into contact with a mounting plate for supporting the voice / control signal head. It is an auxiliary loading mechanism according to.

Embodiments Embodiments embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.

It should be noted that the following embodiments are examples of embodying the present invention and are not of the nature to limit the technical scope of the present invention.

Here, FIG. 1 is a plan view of an auxiliary loading mechanism according to an embodiment of the present invention, and FIG. 2 is a side view of FIG.

Further, elements common to those of the conventional auxiliary loading mechanism A shown in FIGS. 3 to 5 will be described using the same reference numerals.

In the auxiliary loading mechanism C according to this embodiment, as shown in FIG. 1 and FIG.
To the first auxiliary loading arm 18 with the
A shaft 5a for swingably supporting the auxiliary loading post 4 is pierced and fixed to the recording / reproducing device.

A first notch portion 18a is formed on a side portion of the first auxiliary loading arm 18, and an engaging portion 18b is formed in a hook shape on an upper surface of a central portion of the first auxiliary loading arm 18. Is formed in.

On the upper part of the shaft 5a, a second auxiliary loading arm 19 having a drive shaft 6 at one end and a projecting part 19a at the other end for engaging with the engaging part 18b is swingably fitted and inserted. ing.

One end and the other end of the second auxiliary loading arm 19 are engaged with the second notch 19b formed on the side of the second auxiliary loading arm 19 and the first notch 18a of the first auxiliary loading arm 18, respectively. , The first and second auxiliary loading arms 18 and 19
Direction in which the engaging portion 18b and the protruding portion 19a are mutually engaged, that is, the first auxiliary loading arm 18 is in the direction of arrow 20 with respect to the second auxiliary loading arm 19 (head for voice and control signals described later). A torsion coil spring 21 for elastically urging in the direction (3) is loosely fitted to the lower portion of the shaft 5a.

When the first auxiliary loading arm 18 having the auxiliary loading post 4 is swung in the direction of arrow 20, the auxiliary loading post 4 that engages with the magnetic tape 2 is moved with respect to the voice / control signal head 3. In order to stop the magnetic tape 2 at a position where the magnetic tape 2 is wound at a predetermined angle (a predetermined position), the head mounting plate 22 of the voice / control signal head 3 is provided with a tip portion 23 of the first auxiliary loading arm 18. An abutting portion 24 that abuts is provided.

The contact portion 24 is attached to the voice / control signal head 3 even when the position of the head mounting plate 22 is adjusted in the direction of the arrow 17 in order to adjust the position of the voice / control signal head 3. Magnetic tape 2
Is formed in a curved surface such that the winding angle of is always constant.

In this case, the distal end portion 23 of the first auxiliary loading arm 18 and the contact portion 24 of the head mounting plate 22 constitute a post positioning mechanism.

In the auxiliary loading mechanism C configured as described above, the first auxiliary loading arm 18 having the auxiliary loading post 4 is driven by swinging the drive shaft 6 in the direction of arrow 25 by a drive mechanism (not shown). The first auxiliary loading arm 18 is oscillated around the shaft 5a toward the voice / control signal head 3 (in the direction of arrow 20).
The tip portion 23 of the abuts on the abutting portion 24 of the head mounting plate 22.

As a result, the magnetic tape 2 that is engaged with the auxiliary loading post 4 and pulled out from the cassette (not shown) is
It is wound around the control signal head 3 at a predetermined angle.

Thereafter, the drive shaft 6 is further swung in the direction of the arrow 25, so that only the tip portion of the second auxiliary loading arm 19 (on the side where the protruding portion 19a is provided) is further indicated by the arrow 20.
The first auxiliary loading arm 18 is elastically biased toward the voice and control signal head 3 with a larger elastic force by elastic strain energy further swung in the direction and further stored in the torsion coil spring 21. The contact portion 24 of the head mounting plate 22 is constantly pressed.

Therefore, in order to adjust the position of the voice / control signal head 3, the mounting position of the head mounting plate 22 is indicated by an arrow.
Even when the position is adjusted in the 17 direction, the auxiliary loading post 4 implanted in the first auxiliary loading arm 18 keeps the winding angle of the magnetic tape 2 around the voice / control signal head 3 constant. In addition, the position changes following the position change of the voice and control signal head 3.

Effect of the Invention As described above, the present invention draws out the magnetic tape from the cassette loaded in the magnetic recording / reproducing apparatus at the time of fast-forwarding and rewinding the tape of the rotary head type magnetic recording / reproducing apparatus, and heads for voice and control signals. An auxiliary loading mechanism comprising a drive mechanism for swinging and supporting a loading arm having a loading post for contacting the head with the audio / control signal head, wherein the loading arm has the loading post at one end. And a second loading arm whose one end is connected to the drive mechanism, and are swingably supported to the voice and control signal head side on the same axis. , The voice of the first loading arm relative to the second loading arm , The first loading arm and the second loading arm are engaged with each other so as to restrict swinging toward the control signal head side, and the first loading arm and the second loading arm are mutually engaged. One end of the torsion coil spring for urging in the engaging direction is referred to as the first
The other end of the first loading arm is locked to the second loading arm, and when the first and second loading arms are swung toward the voice and control signal heads, the first loading arm A post positioning mechanism for stopping the loading post at a predetermined position relative to the voice / control signal head by bringing the tip of the arm into contact with a mounting plate for supporting the voice / control signal head. Since the auxiliary loading mechanism is characterized by the above, even if the position of the mounting position of the head for voice / control signals is adjusted, the position of the mounting position of the auxiliary loading post is not adjusted, It is possible to always keep the winding angle of the magnetic tape around the head constant. It become possible to provide an auxiliary loading mechanism.

Further, in the auxiliary loading mechanism, since the loading arm itself is divided into two parts and engaged with each other and integrated by the action of the torsion coil spring, excessive swing of the loading arm is extremely compact and rational. Can be avoided under different configurations.

[Brief description of drawings]

FIG. 1 is a plan view of an auxiliary loading mechanism according to an embodiment of the present invention, FIG. 2 is a side view taken along the arrow B in FIG. 1, and FIG. 3 is a rotary head type magnetic recording having a conventional auxiliary loading mechanism. FIG. 4 is a schematic plan view of the reproducing apparatus when the tape is fast forwarded and rewound, FIG. 4 is a plan view of the auxiliary loading mechanism in FIG. 3, and FIG. 5 is a side view taken along the arrow D in FIG. (Explanation of reference numerals) 3 ... Head for voice and control signal 4 ... Auxiliary loading post 5a ... Shaft, 6 ... Driving shaft 18 ... First auxiliary loading arm, 18a ... First cutout portion, 18b ... Engagement portion, 19 ... second auxiliary loading arm, 19a ... projection, 19b ... second notch, 21 ... torsion coil spring 22 ... head mounting plate, 23 ... tip 24 ... contact part C ... auxiliary loading mechanism.

Claims (1)

[Scope of utility model registration request] 1. A loading post for pulling out a magnetic tape from a cassette loaded in the magnetic recording / reproducing apparatus and bringing it into contact with a voice / control signal head at the time of fast-forwarding and rewinding the tape of the rotary head type magnetic recording / reproducing apparatus. An auxiliary loading mechanism comprising a drive mechanism for swingably supporting the loading arm having the above-mentioned head to the voice and control signal head side, wherein the loading arm has a first end on which the loading post is implanted. And a second loading arm whose one end is connected to the drive mechanism,
The voice and control signal head side is swingably supported on the same axis, and the swing of the first loading arm with respect to the second loading arm toward the voice and control signal head side is restricted. As the first
Of the first loading arm and the second loading arm are engaged with each other.
One end of the torsion coil spring for urging the loading arms of the second loading arm in the direction of mutual engagement is locked to the first loading arm, and the other end is locked to the second loading arm. Voice arm,
When the loading post is swung in the direction of the control signal head, the tip of the first loading arm is brought into contact with the mounting plate that supports the voice and control signal head to move the loading post to the voice and control signal. An auxiliary loading mechanism comprising a post positioning mechanism for stopping at a predetermined position with respect to the head.