JPH04283409A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To easily enable a miniaturization by constituting a contactor which transfers a signal between a magnetic head and an outside in which a pair of conductive parts are provided on an insulated main body part capable of being elastically deformed, and insulated parts are provided on each edge part of the opposed conductive parts. CONSTITUTION:A contactor 11 is provided with a structure in which a central part has a notched part 11c and an almost U-shaped main body part 11B capable of being elastically deformed is filmed with a pair of conductive films 18 and 19 so that a pair of conductive parts can be formed. Insulated parts 11d, 11e, and 11f are provided on each edge part of the conductive films 18 and 19. A material having the flexibility is selected for the conductive films 18 and 19, so that they can not be peeled off even when the main body 11B is elastically deformed. Thus, a pair of opposed up-and-down faces of the contactor 11 are electrically conducted. Thus, since the transfer of the signal between the magnetic head and the outside can be attained, a structure can be easily simplified and miniaturized.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus having a rotating drum unit and recording and reproducing signals using a magnetic tape.

0002

2. Description of the Related Art Conventionally, video tape recorders and the like (hereinafter referred to as magnetic recording and reproducing devices) record and reproduce signals by winding a magnetic tape at a predetermined angle, such as about 180 degrees or about 360 degrees, around a rotating drum unit equipped with a magnetic head. In general, a rotating drum unit is composed of a rotating upper cylinder and a fixed lower cylinder, and the upper cylinder has, for example, 18 cylinders.
A pair of magnetic heads are arranged 0 degrees apart. The magnetic head is connected to an external electronic circuit via a rotary transformer provided within the rotating drum unit.

[0003] A method of connecting a magnetic head and a rotary transformer via a conductive member is disclosed in Japanese Patent Laid-Open No. 59
As described in Japanese Utility Model Publication No. 119505, Japanese Utility Model Application Publication No. 63-149409, etc., two conductive members per magnetic head are fixed to an insulating holder, and the holder is connected to the magnetic head and rotary transformer. It is configured to be arranged between each conductive pattern.

FIG. 8 is an exploded perspective view of a rotating magnetic head device (corresponding to a rotating drum unit) according to an embodiment of the same invention disclosed in Japanese Utility Model Application Publication No. 63-149409. The rotating drum unit 1 consists of a rotating upper drum 2 and a fixed lower drum 3. A head base 5 holding a magnetic head 4 is attached to the upper drum 2, and a coil of the magnetic head is attached to the head base 5. A head substrate 7 having first conductive patterns 6a and 6b connected to the head substrate 7 is attached.

The rotor core 8a of the rotary transformer 8 has a second conductive pattern 9a connected to the coil of the transformer.
, 9b is attached to a conductive substrate 10 having conductive patterns 9a, 9b.

[0006] Contacts 11a and 11b made of elastically variable members with electrically conductive surfaces are inserted into mounting grooves 13a and 13b of the holder 12, and the holder 12 is locked. It is attached to the head base 5 by engaging the protrusions 14a, 14b, and 14c. and,
By combining the upper drum 2 and the lower drum 3, the contacts 11a and 11b are compressed and elastically deformed to enable electrical conduction between the first conductive patterns 6a and 6b and the second conductive patterns 9a and 9b. It is configured to do this.

[0007]

However, in the above-mentioned conventional example, as the number of magnetic heads increases and the demand for miniaturization of devices increases, components inevitably become smaller. The distance between the conductive patterns 9a and 9b on the rotary transformer becomes narrower, and the contact 11
There is a drawback that when a and 11b are elastically deformed, there is a risk that they will come into contact with each other and cause a short circuit.

The present invention has been made to solve the problems of the prior art described above, and is capable of making the connection between the magnetic head and the rotary transformer reliable and simple, preventing short circuits caused by elastic deformation of the contacts, and achieving miniaturization. The object is to provide an easy magnetic recording/reproducing device.

[0009]

[Means for Solving the Problems] Therefore, the magnetic recording and reproducing apparatus according to the present invention includes a conductive pattern on a head substrate connected to a magnetic head provided in a rotating drum unit, and a rotary transformer located at a position opposite to the conductive pattern. A magnetic recording and reproducing device that presses an elastically deformable contact with a conductive pattern connected to a rotor core to establish continuity between the conductive patterns and transmit and receive signals between a magnetic head and the outside, the contact being insulated. The above object is achieved by a structure characterized in that a main body part that can be elastically deformed has a pair of conductive parts, and an insulating part is provided at each end of the opposite conductive parts. be.

0010

[Operation] With the above configuration, the elastically deformable contact can be
A pair of conductive parts formed on the contact body are brought into pressure contact with a conductive pattern connected to a magnetic head provided on a rotating drum unit and a conductive pattern connected to a rotor core of a rotary transformer located opposite to the conductive pattern. Conductivity is established between the patterns, enabling signal transmission and reception between the magnetic head and the outside, allowing magnetic recording and reproduction.

[0011] Furthermore, by providing an insulating part at each end of the conductive part of the contact, even if the contact body is elastically deformed, the conductive parts will not come into contact with each other and cause a short circuit between the conductive parts. .

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic recording/reproducing apparatus according to the present invention will be explained below with reference to embodiments.

This embodiment is a magnetic recording and reproducing device that performs recording and reproducing by winding a magnetic tape at a predetermined angle such as about 180 degrees or about 360 degrees around a rotating drum unit equipped with a magnetic head. It is something that you have.

FIG. 1 is a sectional view of a rotating drum unit used in an embodiment of the present invention, FIG. 2 is a plan view of the lower cylinder when the same rotating drum unit is assembled, and FIG. 3 is a bottom view of the head base. . The same or corresponding parts as those in conventional FIG. 8 are indicated by the same reference numerals.

The rotating drum unit 1 includes an upper cylinder 2, a lower cylinder 3, a head base 5, a conductive board 9, and a contactor 11.
, holder 12, etc.

The upper cylinder 2 is attached to a rotor stand 15 protruding from the lower cylinder 3 to rotate. A head base 5 is attached to the lower surface of the upper cylinder 2 facing the lower cylinder 3.

A magnetic head 4 is adhesively fixed to the head base 5, and a head substrate 16 is provided on the surface facing the lower cylinder 3. First conductive patterns 6a and 6b are formed on the head substrate 16 to which end wire portions 17a and 17b of the coil wound around the magnetic head 4 are electrically connected. The conductive patterns 6a and 6b occupy a relatively large area within the head substrate 16.

The lower cylinder 3 has the rotor stand 15 described above.
is rotatably inserted therethrough, and a rotary transformer 8 is also provided. The rotary transformer 8 includes a rotor core 8a that rotates integrally with the rotor base 15, and a stator core 8b fixed to the lower cylinder 3.

The holder 12 is made of synthetic resin, and the rotor core 8a
This is a member formed by insert molding a conductive pattern board 9 connected to the . The holder 12 holds the conductive pattern substrates 9a and 9b in a state in which the upper cylinder 2 is attached to a predetermined position.
is bonded to the rotor core 8a so as to substantially face the conductive patterns 6a, 6b on the magnetic head side. Further, the coils drawn out from the rotor core 8a are connected to conductive pattern substrates 9c and 9d, respectively.

FIG. 4 is a front view of the contactor 11, and FIG. 5 is a plan view thereof. As shown in the figure, the contactor 11 includes a main body 11B that is elastically deformable, such as silicone rubber, and has a notch 11C in the center and has a substantially U-shape, and a pair of conductive films extending from the side surfaces to the upper and lower surfaces thereof. 18 and 19 are coated to form a pair of conductive parts.

Insulating portions 11d, 11e, and 11f made of silicone rubber are provided at each end of the conductive films 18 and 19.

Since the conductive films 18 and 19 are made of a flexible material, they will not peel off even if the main body portion 11B is elastically deformed. The conductive films 18 and 19 are formed on the outer periphery of the main body 11B using, for example, a vapor deposition method.

With this configuration, the pair of opposing upper and lower surfaces of the contactor 11 are electrically connected.

Note that one set of the contactor 11 and the conductive pattern board 9 is required for each head base 5, but illustration and description thereof are omitted.

Next, the assembly of each of the above-mentioned components will be explained. The upper cylinder 2 to which the head base 5 is attached is attached to the rotor stand 15. As described above, when the upper cylinder 2 is attached to the rotor stand 15, the upper cylinder 2 is attached so that the conductive patterns 6a, 6b and the conductive pattern substrates 9a, 9b are substantially opposed to each other.

Therefore, by attaching the upper cylinder 2 to the rotor stand 15, the contactor 11 can be connected to the conductive patterns 6a, 6b.
come into contact with. The height dimension of the contactor 11 is based on the head base 5.
Since the dimension is selected to be larger than the predetermined distance between the conductive pattern substrate 9 and the conductive pattern substrate 9, the contact 11 is pressed and elastically deformed in the assembled state, and is pressed against the conductive patterns 6a, 6b and the conductive pattern substrate 9a, 9b, and the magnetic head 4 and the coil of rotor core 8a are electrically connected.

1A-A shown in FIG.
Although it is compressed and deformed as shown in the cross-sectional view, the insulating parts 11d and 11e of the contactor 11 can prevent the conductive parts 18 and 19 from coming into contact with each other and causing a short circuit.

In the above embodiment, the structure of the contactor 11 is made of elastically deformable main body 11B such as silicone rubber.
Although the structure is such that the conductive films 18 and 19 are formed on the main body, the present invention is not limited to this. For example, a structure in which a conductive pattern is formed on a flexible substrate and disposed on the main body is also possible, or even the main body itself may be made of anisotropic conductive rubber. In this case as well, an insulating portion is provided at each end of the conductive portion.

[0029]

As explained above, according to the present invention, an elastically deformable contactor is connected to a conductive pattern connected to a magnetic head provided in a rotating drum unit and a rotary transformer located at a position opposite to the conductive pattern. A pair of conductive parts formed on the contact body are brought into pressure contact with the conductive pattern connected to the rotor core, and conduction is established between both the conductive patterns.
Since signals can be exchanged between the magnetic head and the outside,
Simple structure and easy to downsize.

Furthermore, by providing an insulating part at each end of the conductive part of the contact, even if the contact main body is elastically deformed, the conductive parts will not come into contact with each other and cause a short circuit between the conductive parts. Therefore, it is possible to provide a magnetic recording/reproducing device with high durability and reliability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rotating drum unit used in one embodiment.

FIG. 2 is a plan view of the lower cylinder when the rotating drum unit used in one embodiment is assembled.

FIG. 3 is a bottom view of the head base.

FIG. 4 is a front view of the contactor.

FIG. 5 is a plan view of the contactor.

FIG. 6 is a sectional view taken along the line AA' in FIG. 1;

FIG. 7 is an exploded perspective view of essential parts of the rotating drum unit of the embodiment.

FIG. 8 is an exploded perspective view of a main part of a conventional rotary drum unit.

[Explanation of symbols]

1 Rotating drum unit 4 Magnetic heads 6, 6a, 6b Conductive pattern on the magnetic head side (first
7 Head board 8 Rotary transformer 8a Rotor core 9, 9a, 9b Conductive pattern connected to the rotor core (second conductive pattern) 11, 11a, 11b Contact 11B Contact main body 11C Contact notch Parts 11d, 11e, 11f Insulating part 12 Holder 15 Rotor base 18, 19 Conductive film

Claims (1)

[Claims] 1. An elastically deformable contact is brought into pressure contact with a conductive pattern on a head substrate connected to a magnetic head provided in a rotating drum unit and a conductive pattern connected to a rotor core of a rotary transformer located opposite to the conductive pattern. A magnetic recording and reproducing device that transmits and receives signals between the magnetic head and the outside by connecting the conductive patterns with each other; A magnetic recording/reproducing device characterized in that an insulating portion is provided at each end of the conductive portion.