JPH0748248B2 - Rotating magnetic head 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 rotary magnetic head device having a structure in which a special connector member is used to easily and reliably make electrical connection associated with the rotary magnetic head.

[0002]

2. Description of the Related Art FIG. 1 is a sectional view showing the structure of an example of a conventional general rotary magnetic head device. In the figure, the rotary magnetic head device 1 comprises a lower fixed drum 2 and an upper rotary drum 3. The rotary drum 3 is fitted on the rotary shaft 4 and screwed to a flywheel 5 fixed to the rotary shaft 4. On the lower surface of the rotary drum 3, a head support 7 having a rotary magnetic head 6 at its tip is fixed by a screw 8. The magnetic head 6 rotates integrally with the rotary drum 3 and records and reproduces a video signal on the magnetic tape 9 which runs spirally around the drum peripheral surface.

[0003]

Here, signal transmission between the rotary magnetic head 6 and an external recording / reproducing circuit is performed via a well-known signal transmitting portion such as the rotary transformer 10 and slip ring. . In particular, the electrical connection between the magnetic head 6 and the signal transmission unit such as the rotary transformer 10 is once made by the lead wire via the relay substrate. That is, as also shown in FIG. 2, the first lead wire 11 has one end connected to the terminal 13a of the relay substrate 12 fixed to the magnetic head 6 and the other end fixed to the drum upper surface, and the through hole 3a of the drum 3 is formed. The second lead wire 14 is inserted inside and is connected to another terminal 13b of the relay board 12 and is drawn out to the rotary transformer side. Since the lead wires are used for connection in this way, cumbersome terminal treatment such as stripping of the coating on both ends of the lead wires, twist positioning, etc. is required, and soldering of the lead wires is done manually for each Must be positioned at the same time, and the lead wire processing and soldering work must be done carefully in a limited narrow space.
As a whole, there are drawbacks in that the work requires skill, the workability is poor, and the electrical connection is not reliable.

[0004]

DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and has a structure in which electrical connection relating to a rotary magnetic head can be easily made, and a substantially columnar body provided with a planar side surface. The rotating magnetic head is supported by a connector member having a structure in which a conductive elongated connection terminal member is embedded in the connector body made of an insulating material in the longitudinal direction with both end portions thereof protruding outward. The one end of the connection terminal member is electrically connected to the conductive member on the head support in a state where the planar side surface is inserted as the insertion guide surface into the through hole of the rotary drum to which the head support is attached. On the other hand, the other end of the connection terminal member is electrically connected to the signal transmitting portion, and the rotary magnetic head device is configured to electrically connect the rotating magnetic head and the signal transmitting portion. is there.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rotary magnetic head device according to the present invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the rotary magnetic head device according to the present invention. In the figure, the same components as those shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. In this rotary magnetic head device 20, reference numeral 21 denotes a connector member which is an essential part of the present invention and is fitted in the hole 3a of the rotary drum 3, and the relay substrate 12 which is conventionally provided is not provided.

As shown in FIGS. 4A, 4B, and 4C, the connector member 21 has a structure in which conductive terminal members 23a and 23b are embedded in a connector body 22 made of synthetic resin. As shown in FIGS. 5A, 5B, and 5C, the connector body 22 is a columnar body having a substantially semicircular cross section, and has a pair of slits 22 in the longitudinal direction.
a and 22b are formed at a predetermined distance from each other, and the lower end is a tapered surface 22c. The terminal member 23a is shown in FIGS.
An elongated flat plate member whose one end is a bending arm,
Similarly, the terminal member 23b is an elongated flat plate member having one end as a bending arm portion shown in FIGS. 7A, 7B and 7C, and the main body portions 23a-1 and 23b-1 are press-fitted into the slits 22a and 22b, respectively. And fixed, and the upper and lower end sides respectively project to the outside. That is, the connector member 21 has a pair of arm portions 23a-2, 23b-2 projecting to the upper side of the connector body 22 to the right and left,
The terminal parts 23a-3 and 23b-3 are formed so as to protrude downward. Here, the arms 23a-2, 23b-2 have protrusions 23a-2a,
23b-2a, and is inclined obliquely downward with respect to the horizontal plane H by an angle α.

As shown in FIG. 8, the connector member 21 is press-fitted from the terminal portion side into the through hole 3a from the lower surface (in FIG. 3) side of the drum 3. The arrow X indicates the insertion direction. Here, the head support 7 is attached with its end surface 7a partially blocking the opening of the hole 3a, and the connector member 21 is guided by the end surface 7a of the flat side surface 22d of the connector body 22 and protrudes in the rotating direction. The portions 23a-2a and 23b-2a are positioned and inserted so as to face the conductive patterns 24a and 24b on the head support 7, respectively. Further, the insertion is easily performed by the action of the tapered surface 22c.

As shown in FIG. 9, the connector member 21 is inserted until substantially the entire connector body 22 is fitted into the hole 3a. At the final stage of the insertion, the arm portions of the terminal members 23a and 23b are inserted.
23a-2 and 23b-2 are locked to the upper surface of the head support and elastically deformed relatively upward to the horizontal position. Here, the connector main body 22 is press-fitted into the hole 3a, and is lifted up even if a force in the direction opposite to the insertion direction is applied by the elastic force of the arms 23a-2 and 23b-2. Rather, it is stably held at the final insertion position. Therefore, when the connector member 21 is inserted to the final position, the protrusions 23a-2a and 23b-2a are repelled by the elastic force of the arms 23a-2 and 23b-2, respectively.
It is in a state of being pressed against a and 24b.

Further, as shown in FIG. 10, terminal portions 23a-3 and 23b-3 are projected on the upper surface side of the rotary drum 3 (the lower surface side when the connector member 21 is inserted). By bending the protruding terminal portions 23a-3 and 23b-3 in the inserted state, it is possible to prevent the connector member 21 from falling off and facilitate soldering to the lead wire 14.

With the connector member 21 inserted, the protrusions 23a-2a, the conductive pattern 24a, and the protrusions 23b- which are in a pressure contact state.
The portion between 2a and the conductive pattern 24b is soldered as shown in FIG. Reference numerals 25a and 25b indicate soldering portions. Further, regarding the protruding terminal portions 23a-3, 23b-3, the lead wire 14 drawn from the signal transmission portion of the rotary transformer 10 or the like is used.
The terminals are soldered. Thereby, the magnetic head 6
Is electrically connected to a recording / reproducing circuit outside the drum via the conductive patterns 24a and 24b, the terminal members 23a and 23b, the lead wire 14, and the rotary transformer 10.

In the state where the connector member 21 is inserted, the terminal portions 23a-3 and 23b-3 are fixedly arranged and function similarly to the terminals on the conventional relay board. It is not specially provided.

The sequential supply of the connector member 21, the fitting into the drum through hole 3a, and the soldering of the protrusions 23a-2a, 23b-2a and the conductive patterns 24a, 24b are automatically performed. Therefore, the reliability of electrical connection is improved and the productivity is improved.

The through hole 3a of the rotary drum 3 is necessary for relaying a signal to the rotary magnetic head 6 or a signal from the rotary magnetic head 6 to the rotary transformer 10, but on the other hand, it is rotationally symmetric. However, since the rotating drum 3 is required to have a local lack of mass, it causes asymmetry, which is not preferable.

On the other hand, according to the configuration of the above-described embodiment of the present invention, the connector body 22 is fitted in the through hole 3a and the through hole 3a is filled with the connector body 22, so that the through hole 3a is formed. It has the effect of compensating for the local lack of mass, resulting in an improved drum weight balance,
The performance of the drum is improved.

[0016]

As described above, in the rotary magnetic head device according to the present invention, the distance between the head support mounted on the rotary drum and the connector body is uniquely determined, and the connector body is fitted into the through hole. In this case, the position of the connector body in the fitting direction is uniquely determined without providing a separate position regulating means, and therefore the reliability of the electrical connection between the rotary magnetic head and the outside can be improved, and the connector body is provided. Since the flat side surface is inserted while being guided by the end surface of the head support, the position of the connector member in the rotation direction is uniquely determined, and the position adjustment in the rotation direction is not required, and the connector member is not required. It is very easy to insert the rotary drum into the through hole of the rotary drum, and the electrical connection is performed with good workability. It becomes extremely easy to automatically insert into the hole and solder, and according to the present invention, the through hole of the rotary drum is filled with the connector body by using the connector member. , Has a function of compensating for the local lack of mass due to the through hole of the rotating drum, and as a result, the balance of the weight of the drum and the like is improved,
Features such as improved drum performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of a conventional rotary magnetic head device.

FIG. 2 is a perspective view of an upper rotary drum in FIG. 1 as viewed from above.

FIG. 3 is a sectional view of an embodiment of the rotary magnetic head device according to the present invention.

FIG. 4 is a view showing a connector member of an embodiment of the device of the present invention.

FIG. 5 is a view showing a connector body of an embodiment of the device of the present invention.

FIG. 6 is a view showing a terminal member of an embodiment of the device of the present invention.

FIG. 7 is a diagram showing a terminal member of one embodiment of the device of the present invention.

FIG. 8 is a view showing a state in which the connector member of the embodiment of the device of the present invention is inserted into the hole of the rotary drum.

FIG. 9 is an enlarged view showing an electrical connection state between the connector member and the head support in a state where the connector member of the embodiment of the device of the present invention is inserted.

FIG. 10 is a perspective view of the rotary drum as seen from the upper side, showing an electrically connected state between the lead wire and the terminal portion of the inserted connector member in the state where the connector member of the device of the present invention is inserted. .

[Explanation of symbols]

 2 Fixed drum 3 Rotating drum 3a Through hole 6 Rotating magnetic head 7 Head support 9 Magnetic tape 10 Rotary transformer (Signal transmission part) 14 Lead wire 20 Rotating magnetic head device 21 Connector member 22 Connector body 22d Plane side surface 23a, 23b Terminal member 23a-2, 23b-2 Arm part 23a-2a, 23b-2a Projection part 23a-3, 23b-3 Terminal part 24a, 24b Conductive pattern (conductive member) 25a, 25b Soldering part

Claims (1)

[Claims] 1. A connector main body made of an insulating material, which is a substantially columnar body having a flat side surface, and a conductive elongated connecting terminal member in the longitudinal direction with both end portions thereof protruding outward. One end portion of the connection terminal member with the connector member having a buried structure inserted in the through hole of the rotary drum to which the head support for supporting the rotary magnetic head is inserted with the planar side surface as an insertion guide surface. Is electrically connected to the conductive member on the head support, while the other end of the connection terminal member is electrically connected to the signal transmitting portion, and the rotary magnetic head and the signal transmitting portion are electrically connected. A rotary magnetic head device configured to be connected.