JP2552534Y2 - Ground mechanism for rotary head cylinder device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding mechanism for a rotary head cylinder of a VTR (magnetic recording / reproducing apparatus).

[0002]

2. Description of the Related Art In a conventional VTR, a grounding mechanism of a rotary head cylinder contacts a grounding member (4a) fixed to a main chassis (1) with a rotary cylinder (22) as shown by a solid line in FIG. As indicated by the two-dot chain line, the main chassis
(1) An earth member (4) is provided so as to straddle the upper cylinder chassis (3) and the rotary cylinder (22).

[0003]

In the above prior art, the tip of the grounding member (4) is provided with a rotary drive shaft projecting at the center of the upper surface of the rotary cylinder (22) in order to reduce the rotational friction. Ground member (4) because it is applied to the center of (23)
The length of the wire becomes long, and the shape becomes complicated, resulting in high cost. The present invention clarifies an earthing mechanism of a rotary head cylinder device that solves the above-mentioned problem.

[0004]

The cylinder grounding mechanism of the present invention comprises a rotary drive shaft coaxial with the stationary cylinder (21).
(23) is provided with a rotating cylinder (22), a magnetic head is provided on the outer peripheral portion of the rotating cylinder (22), and the rotating cylinder (22)
A rotary transformer is arranged on the opposite surface of the stationary cylinder (21) and the rotary head cylinder device (2) mounted on the main chassis (1) at an angle.
The other end (42) of the earthing member (4) having the first member (1) in contact with the rotary cylinder (22) is brought into contact with the components of the cassette loading mechanism (5), and the cylinder is grounded via the cassette loading mechanism (5). .

[0005]

[Function and effect] Earth member (4) of rotary cylinder (22)
The cassette loading mechanism near the cylinder
By connecting to the main chassis (1) via (5), the grounding member (4) can be shortened, the shape can be simplified, and the cost can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment using an 8 mm VTR will be described below, but the present invention is not limited to this, and it goes without saying that the present invention can be applied to a VTR using a rotary head cylinder device. FIG. 1 shows a plan view of an 8 mm VTR. As is well known, a rotary head cylinder device (2) and a reel chassis which can be approached to and separated from the head cylinder device (2) by tilting an axis on a main chassis (1). (8) is deployed.

A supply reel stand on a reel chassis (8)
(6) A take-up reel table (61) and a cassette loading mechanism (5) are provided. The cassette loading mechanism (5) is a slide support member of the reel chassis (8).
The main chassis (1) is electrically connected to the main chassis (1) via a circuit (not shown) or the like.

[0008] The cassette loading mechanism (5) comprises:
Orientation support (5) that does not move relative to the main chassis (1)
A cassette holder (52) is connected to 1) via a rotation connection member (53). The support shaft (51) is electrically connected to the main chassis (1) via a bracket (not shown) that supports an end of the support shaft.

In the eject mode, the reel chassis
(8) is separated from the head cylinder device (2), and the cassette holder (52) of the cassette loading mechanism (5) is raised. When the cassette is inserted into the cassette holder (52), the holder (51) is lowered, and the reel chassis (8) slides toward the head cylinder device (2) to bring the cassette close to the head cylinder device (2). Can be recorded and played back.

The head cylinder device (2) is, as known,
Coaxial with the stationary cylinder (21), the rotary drive shaft (23)
A rotary cylinder (22) provided with a magnetic head (not shown) is provided on the main chassis (1), and an outer peripheral portion of the rotary cylinder (22). Rotating cylinder (22) and stationary cylinder
A rotary transformer (not shown) is provided on the opposite surface of (21).

A tape guide member (7) is provided above the head cylinder device (2) and close to the rotary cylinder (22). The tape guide member (7) is made of synthetic resin and is for preventing the tape from slipping off the head cylinder device (2) and coming off the main chassis by leg pieces (71) provided on the side. It is fixed to (1).

A substantially central portion of a conductive and spring-like plate-like grounding member (4) is fixed on the tape guide member (7). One end (41) of the grounding member (4) is repelled to the center of the rotation drive shaft (23) of the rotary cylinder (22), and the other end is repelled to the rotation support shaft (51) of the cassette loading mechanism (5). In contact.

As described above, by bringing the ground member (4) of the rotary cylinder (22) into contact with the main chassis (1) via the cassette loading mechanism (5) near the cylinder, the ground member (4) becomes The length can be shortened, the shape can be simplified, and the cost can be reduced.

In implementing the present invention, the ground member (4)
It is not necessary to always contact the cassette loading mechanism (5), and when the rotary cylinder (22) rotates, that is, in the recording / reproduction mode (including special reproduction), the ground member (4) and the cassette loading mechanism are used. It is only necessary that (5) makes contact, so that a ground member (4) is provided so as to come into contact with any of the components at the stationary position of each component of the cassette loading mechanism (5) in the recording / reproducing mode. OK.

The description of the above embodiment is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims for utility model registration or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims for utility model registration.

[Brief description of the drawings]

FIG. 1 is a plan view of a VTR.

FIG. 2 is an explanatory view for attaching a ground member.

FIG. 3 is an explanatory view of a conventional grounding mechanism.

[Explanation of symbols]

 (1) Main chassis (2) Cylinder device (21) Stationary cylinder (22) Rotating cylinder (4) Ground member (5) Cassette loading device

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotary cylinder (22) having a rotary drive shaft (23) is arranged coaxially with a stationary cylinder (21), and a magnetic head is provided on an outer peripheral portion of the rotary cylinder (22). One end of a grounding member (4) is provided in a rotary head cylinder device (2), which is configured by disposing a rotary transformer on the opposing surface of a cylinder (22) and a stationary cylinder (21), and is attached to a main chassis (1) at an angle. (41) into contact with the rotating cylinder (22) and the other end (42) with the cassette loading mechanism.
A grounding mechanism for a rotary head cylinder device, wherein a cylinder ground is taken through a cassette loading mechanism (5) by contacting the component (5).