JPH0677020U - Grounding mechanism for rotating head cylinder device - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the grounding mechanism of the rotary head cylinder device of a VTR. [Structure] A rotary cylinder (22) equipped with a rotary drive shaft (23) is provided coaxially with the stationary cylinder (21), and a magnetic head is provided on the outer peripheral portion of the rotary cylinder (22). 22) and the stationary cylinder (21), a rotary transformer is provided on the opposing surface, and the rotary head cylinder device (2) is mounted on the main chassis (1) at an inclination.
Grounding member with one end (41) in contact with the rotating cylinder (22)
The other end (42) of (4) is the cassette loading mechanism (5)
Cylinder ground is made through the cassette loading mechanism (5) by making contact with the component parts.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grounding mechanism in a rotary head cylinder of a VTR (magnetic recording / reproducing device).

[0002]

[Prior art]

 In the conventional VTR, the grounding mechanism of the rotary head cylinder is such that the grounding member (4a) fixed to the main chassis (1) is brought into contact with the rotary cylinder (22) as shown by the solid line in FIG. As shown by, a grounding member (4) is provided across the cylinder chassis (3) on the main chassis (1) and the rotary cylinder (22).

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, the tip of the earth member (4) is applied to the center of the rotary drive shaft (23) protruding to the center of the upper surface of the rotary cylinder (22) in order to reduce the rotational friction. Therefore, the routing of the ground member (4) becomes long, and the shape becomes complicated, resulting in high cost. The present invention clarifies a grounding mechanism of a rotary head cylinder device that solves the above problems.

[0004]

[Means for solving the problem]

 The cylinder grounding mechanism of the present invention is provided with a rotary cylinder (22) equipped with a rotary drive shaft (23) coaxially with a stationary cylinder (21), and a magnetic head is provided on the outer peripheral portion of the rotary cylinder (22). The rotary head cylinder device (2) is mounted on the main chassis (1) with a rotary transformer installed on the opposing surfaces of the rotary cylinder (22) and the stationary cylinder (21). The other end (42) of the earthing member (4) in which (41) is brought into contact with the rotating cylinder (22) is brought into contact with the component parts of the cassette loading mechanism (5), and the cylinder earth is brought through the cassette loading mechanism (5). Take.

[0005]

[Action and effect]

 By connecting the earth member (4) of the rotating cylinder (22) to the main chassis (1) via the cassette loading mechanism (5) near the cylinder, the earth member (4) can be short, and Cost can be reduced by simplifying the shape.

[0006]

【Example】

 Hereinafter, an embodiment of the 8 mm VTR will be described, but the present invention is not limited to this, and it goes without saying that it can be applied to a VTR using a rotary head cylinder device. FIG. 1 is a plan view of an 8 mm VTR. As is well known, a rotary head cylinder device (2) and a reel which can be brought into contact with and separated from the rotary head cylinder device (2) by tilting the axis on a main chassis (1). The chassis (8) is deployed.

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

The cassette loading mechanism (5) connects a cassette holder (52) to a localization support shaft (51) that does not move relative to the main chassis (1) via a rotation connecting member (53). . The support shaft (51) is electrically connected to the main chassis (1) via a bracket (not shown) that supports the 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) rises. 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) side to bring the cassette close to the head cylinder device (2). You can record and play with.

As is well known, the head cylinder device (2) is provided with a rotary cylinder (22) having a rotary drive shaft (23) on the main chassis (1) coaxially with the stationary cylinder (21). A magnetic head (not shown) is provided on the outer peripheral portion of the rotary cylinder (22). A rotary transformer (not shown) is provided on the opposing surfaces of the rotary cylinder (22) and the stationary cylinder (21).

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

On the tape guide member (7), a substantially central portion of a plate-like ground member (4) having conductivity and spring property is fixed. One end (41) of the earth member (4) is repelled by the center of the rotary drive shaft (23) of the rotary cylinder (22), and the other end is repelled by the rotary support shaft (51) of the cassette loading mechanism (5). Are in contact.

As described above, the grounding member (4) of the rotary cylinder (22) is brought into contact with the main chassis (1) via the cassette loading mechanism (5) near the cylinder, whereby the grounding member (4) Is short, and the shape can be simplified to reduce the cost.

In implementing the present invention, the earth member (4) does not always have to be in contact with the cassette loading mechanism (5), and when the rotary cylinder (22) rotates, that is, the recording and reproducing mode ( It is only necessary that the grounding member (4) and the cassette loading mechanism (5) come into contact with each other during special playback (including special playback). Therefore, the stationary position of each component of the cassette loading mechanism (5) in the recording / playback mode. On the other hand, it suffices to provide the grounding member (4) so as to contact any of the components.

The above description of the embodiments is for explaining the present invention and should not be construed as limiting the invention described in the scope of the utility model registration request or reducing the scope. Further, the configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the scope of claims for utility model registration.

[Brief description of drawings]

FIG. 1 is a plan view of a VTR.

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

FIG. 3 is an illustration of a conventional grounding mechanism.

[Explanation of symbols]

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

Claims (1)

[Scope of utility model registration request] 1. A rotary cylinder (22) having a rotary drive shaft (23) is provided coaxially with a stationary cylinder (21), and a magnetic head is provided on an outer peripheral portion of the rotary cylinder (22) to rotate the rotary cylinder (22). In the rotary head cylinder device (2), which is constructed by disposing a rotary transformer on the opposing surfaces of the cylinder (22) and the stationary cylinder (21) and is tilted and attached to the main chassis (1), one end of the earth member (4) (41) is in contact with the rotating cylinder (22) and the other end (42) is the cassette loading mechanism.
A grounding mechanism for a rotary head cylinder device, characterized in that the cylinder grounding is performed through the cassette loading mechanism (5) by contacting the component parts of (5).