JPH045041Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a rotating cylinder device.

(b) Prior Art In a video tape recorder (VTR) that records video signals, a tape is wound around a guide cylinder having a rotating head and is run to form a recording track that is inclined with respect to the longitudinal direction of the tape. I have to. One of the structures having this guide cylinder and a rotating head is a rotating cylinder device. This is a configuration in which the guide cylinder is divided into upper and lower halves, one side (for example, the lower guide cylinder) is fixed, and the other side (the upper guide cylinder) has a head fixed and rotated.

In this configuration, that is, in the rotary cylinder device, signals are exchanged with the rotary head in the following manner. That is, a rotor core of a rotary transformer connected to a rotating head is disposed in a rotating upper guide cylinder, and a stator core is disposed in a fixed lower guide cylinder to form a rotary transformer.

One method for connecting the rotor core and the rotary head is disclosed in Japanese Utility Model Application No. 146231/1983. As shown in FIG. 13, this uses a connector member 3 in which a terminal member 1 with one end bent is embedded in a connector body 2 made of an insulating material. The rotating head 4 is fixed to a rotating upper guide cylinder 7 while being supported by a head support 5 having a conductive pattern 6.

When the connector member 3 is fitted into the through hole 8 of the upper guide cylinder 7, the bent arm portion and the conductive pattern 6
connection becomes possible. On the other hand, on the upper surface of the upper guide cylinder 7, as shown in FIG. 14, the terminal part of the terminal member 1 protrudes, and by bending this, the lead wire 9 drawn out from the rotary transformer can be soldered. becomes.

In the conventional example above, the use of a connector member eliminates the need to pull out the lead wire from the head.
Automation becomes possible and productivity improves. However, it was still necessary to pull out the lead wire from the rotary transformer, which resulted in poor workability.

(c) Problems to be solved by the invention As stated above, the conventional technology has not been able to sufficiently improve workability. The present invention has been devised in view of this point, and provides a novel rotary cylinder device whose workability is further improved.

(d) Means for Solving Problems In the present invention, a first relay board is positioned and fixed to a rotating disk having a rotor core fixed to a rotating shaft. A number of sets of conductive patterns corresponding to the number of channels of the rotary transformer are formed on the first relay board. Further, a rotary transformer relay member having a number of cylindrical connecting portions corresponding to the number of channels inserted into the upper cylinder is positioned and fixed to the rotary disk. A pair of conductive members is embedded in the cylindrical connection part,
By being fixed to the rotor core, soldering to the conductive pattern of the first relay board becomes possible. A magnetic head fixed to a head support base having a conductive pattern is fixed to the rotating cylinder, and a head relay member in which a pair of conductive members are embedded corresponding to the magnetic head is placed close to the magnetic head and connected to the rotating cylinder. The relay member is fitted and fixed in the through hole, and the bent terminal of this relay member is soldered to the conductive pattern of the head support. When the rotary cylinder is positioned and fixed with respect to the rotary disk, the cylindrical connection part is inserted into the corresponding through hole of the rotary cylinder, and the connection terminals of the rotary transformer and head relay members are provided on the upper surface of the rotary cylinder. stand out. A second relay board is placed on the upper surface of the rotating cylinder, and is soldered to the conductive pattern of the second relay board.

(D) Function Electrical connection between the rotor core and each magnetic head is made via the first relay board, the rotary transformer relay member, the second relay board, and the head relay member.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view of the embodiment, FIG. 2 is a perspective view of the rotating cylinder device, and FIG. 3 is an exploded perspective view of the upper cylinder portion.

In FIG. 1, reference numeral 10 designates an upper cylinder support base fixed to a rotating shaft 11, to which a rotor core 12 constituting a part of a rotary transformer is connected and fixed, and constitutes a rotating disk 13. The rotor core 12 is provided with a winding, and lead wires 14 and 15 connected to the winding are led out.
16 is a first relay board that is connected and fixed to the rotor core 12, and is connected to the upper cylinder support base 10.
center hole 16a for fitting into the lead wire 14,1
semicircular notches 16b, 16b provided on the outer periphery for passing 5, and positioning grooves 10b provided with high precision positioning relative to the fixing screw holes 10a, 10a of the upper cylinder support base 10. It includes positioning projections 16c, 16c and conductive patterns 17, 17 that fit together. First relay board 1
6 has a conductive pattern surface on its upper surface, and portions 17a, 17a to which lead wires 14, 15 are soldered.
and a portion 17 to which a relay member described below is soldered.
Resist is applied except for b and 17b.

18 is a relay member for a rotary transformer made of resin (polyacetal) in which a conductive member is integrally molded. The relay member 18 includes a cylindrical portion 19 having a positioning protrusion 19a on the inner circumference that fits into the positioning groove 10b of the upper cylinder support 10, and an arm portion 1 that extends radially opposite the outer circumference of the cylindrical portion 19.
8a, 18a, and a cylindrical connecting portion 2 extending parallel to the rotating shaft 11 at the tip of the arm portions 18a, 18a.
Consists of 0,20. Two cylindrical connections 2
Two conductive members 21 are embedded in each of the conductive members 0 and 20, and are insulated from each other by an insulating synthetic resin forming the relay member 18. A connection terminal 2 for connecting to the first relay board 16 is provided at the bottom of the cylindrical connection part 20.
1a is bent and protrudes, and a connecting terminal 21b that extends in the same direction as the cylindrical connecting parts 20, 20 and is not bent protrudes from the upper part having tapered surfaces 20a, 20a to be inserted into the upper cylinder. .

22 is an upper cylinder to which two rotating heads H are fixed. Moreover, in the upper cylinder 22,
A head relay member in which a conductive member is embedded is fitted and fixed in the through hole 22a, and an unbendable connection terminal protrudes from the upper surface of the upper cylinder 22.
The upper cylinder 22 will be explained in more detail later.

Reference numeral 23 designates a second relay circular board, which has a central hole 23a that fits into the outer periphery of the central platform 22b on the upper surface of the upper cylinder 22, and the conductive pattern 24 is connected to the square hole 23.
b, 23c. This second
Resist is also applied to the conductive pattern 24 of the relay board 23, except for connecting portions 24a and 24b with the head relay member and the rotary transformer relay member 18, which will be described later.

As shown in FIG. 3, the upper cylinder 22 has a magnetic head H supported on a head support 25 having conductive patterns 26, 26 for wiring on the bottom side 22c.
is fixed by fixing the support base 25 with screws 27. Fixed head support 25
Through holes 22a, 22a are provided on the sides of the head, into which head relay members 28, 28 are fitted and fixed.

The head relay member 28 is made of resin, and has a semicircular head 28a and a pair of legs 28b, 28b. Two conductive members are embedded in each of the pair of legs 28b, 28b. ing. head 28
Terminals 29a, 29a for connecting to the conductive patterns 26, 26 of the head support stand, which are bent at right angles to the insertion direction, protrude from a. Also, the leg portion 28
Connecting terminals 29b, 29b, which are not bent and are connected to the second relay circular board 23, protrude from the tips of b, 28b in the insertion direction.

When the head relay member 28 is inserted into the through hole 22a on the side of the head support base 25 of the upper cylinder 22, the relay member 28 is held in the upper cylinder 22 by the elasticity of the legs 28b, 28b. In this state, the bent connection terminals 29a, 29a of the head relay member 28 are in contact with the conductive pattern 26 of the head support base 25, and the connection is completed by soldering.

Furthermore, the assembly will be explained based on FIG. The rotor core 12 is fixed to an upper cylinder support 10, and this upper cylinder support 10 is fixed to the rotating shaft 11. Grooves 12 are provided on the upper surface of the rotor core 12 for guiding the lead wires 14 and 15.
a is formed. On the upper surface of this rotor core,
The relay board 16 is fixed with adhesive or the like. At this time, the positioning groove 1 of the upper cylinder support base 10
0b, 10b and the positioning protrusions 16c, 16c fit together, and the relay board 16 is positioned and fixed to the rotor core 12.

Thereafter, the lead wires 14 and 15 are soldered to the conductive pattern portions 17a and 17a of the relay board 16.

Next, the rotary transformer relay member 18 is fitted to the upper cylinder support base 10. Also at this time, the positioning grooves 10b, 10 of the upper cylinder support base 10
b, and the positioning protrusions 19a, 1 of the relay member 18.
9a, the relay member 18 is positioned, and as a result, the conductive pattern portion 1 of the relay board 16
7b, 17b and the bent connection terminal 21a are in contact with each other. Solder this contact part. In this case, since unnecessary portions of the conductive patterns 17, 17 of the relay board 16 are subjected to resist treatment, solder will not adhere to unnecessary portions and will not interfere with subsequent assembly.

Rotating head H and head relay members 28, 28
The upper cylinder 22 to which is attached has a through hole 22
c, 22c, rotary transformer relay member 18
The connecting parts 20, 20 are inserted, and the through holes 2 for the screws 30, 30 provided in the central base part 22b are inserted.
2d, 22d and the screw hole 1 of the upper cylinder support stand 10
The upper cylinder 22 is placed on the upper cylinder support stand 10 so as to be aligned with the upper cylinder support stand 10 and the upper cylinder support stand 10 with screws 30, 30.

When the upper cylinder 22 is fixed to the upper cylinder support base 10, the connection terminal 21b of the rotary transformer relay member 18 is connected from the through holes 22c, 22c.
However, connection terminals 29b of the head relay members 28, 28 protrude from the through holes 22a, 22a, respectively. The connecting terminals of the rotary transformer relay member 18 and the head relay members 28, 28 are arranged in different directions. Therefore, the directions of the square holes 23b and 23c of the second relay board 23 are also adjusted accordingly.
Therefore, the square holes 23c, 23c corresponding to the rotary transformer relay member 18 are parallel to the tangential direction of the outer periphery of the relay board 23, and the head relay member 2
The square holes 23b, 23b corresponding to 8, 28 are oriented in a direction parallel to the radial direction connecting the corresponding head and the center of the substrate. Since the directions of the square holes are different in this way, the second relay board 23 is not placed upside down (with the pattern surface facing downward).

After the second relay board 23 is properly placed on the upper cylinder 22, soldering to each connection terminal is performed to complete the connection from the head to the rotor core.
FIG. 2 is a perspective view of the completed rotary cylinder device, also showing the fixed lower cylinder 31 containing the stator core.

The above example is a two-head case, but
In VTRs, independent heads may be provided for standard mode and long-time mode, or a four-head configuration may be used for special playback, and the greater the number of heads, the more pronounced the effects of the present invention will be. Next, an embodiment of a rotary cylinder device having a four-head configuration will be described.

FIG. 4 is a partially cutaway front view of the lower cylinder, showing the lower cylinder 31, rotating shaft 11, stator core 32, rotor core 12, upper cylinder support 10, and relay board 16. Rotating shaft 11
is rotatably supported by the lower cylinder 31,
Attach the upper cylinder support base 10 to the rotating shaft 11 with the screw 10b.
By fixing the rotor core 12 to the stator core 32, the upper cylinder support base 10 can rotate together with the rotating shaft 11 with a predetermined distance between the rotor core 12 and the stator core 32. Further, 33 is a lead wire from the stator core 32.

FIG. 5 shows the rotor core 1 fixed to the support stand 10.
2 and a first relay board 16. FIG. The relay board 16 has four sets of conductive patterns 17, 17, 1
7 and 17 are the same as the first embodiment, and the positioning groove 10 of the upper cylinder support base 10
A protrusion 16c is fitted into b and fixed in place with adhesive. Four sets of lead wires 34, 34, 34, 34 from the rotor core 12 are soldered to predetermined portions 17a, 17a, 17a, 17a of the conductive pattern. Dotted lines 12a indicate grooves in the rotor core.

FIG. 6 is a front view of the rotary transformer relay member 18, and FIG. 7 is a plan view partially showing the upper cylinder support base 10, the relay member 18, and the first relay board 16. The relay member 16 has arm portions 18a, 1 that protrude radially from the cylindrical portion 19 at intervals of 90 degrees.
8a, 18a, 18a and four cylindrical connection parts 20, 20, 20, 20 provided at the tip of each arm. A positioning protrusion 19 is provided on the inner circumference of the cylindrical portion 19.
a, 19a, which are fitted and positioned in the groove 10b of the upper cylinder support 10, and as shown in FIG. 7, the predetermined conductive pattern 17b and the bent connection terminal 21a are in contact with each other. , soldering is now possible. 8 is a plan view of the upper cylinder 22, FIG. 9 is a plan view showing a part of the lower surface of the upper cylinder 22, and FIGS. 10 and 11 are views showing the head relay member 40. 4 in the upper cylinder 22
A magnetic head H fixed to two head support stands 25, 25, 25, 25 is fixed with screws 27, and through holes 22a, 22a, 22a, 22
a has head relay members 40, 40, 40, 40;
are fitted and fixed.

A pair of conductive patterns 26 are provided on the head support base 25.
is formed, and a lead wire from the magnetic head H is soldered to it. When the head relay member 40 is fixed to the through hole 22a, the bending connection terminal 29
a contacts the conductive pattern 26. This part is then soldered. The head relay member 40 has a semicircular head 40a and a pair of legs 40b, 40b.
and locking claws 40c, 40c provided on the legs, and a conductive member is embedded therein. Through hole 22
When inserted into the upper cylinder 22, the locking claws 40c, 40c engage with the stepped portion 41 in the through hole 22a and are fixed to the upper cylinder 22. In FIG. 8, the cylindrical connection portion 20 of the rotary transformer relay member 18 is inserted into the through hole 22c, and the broken line indicates the connection terminal 21b when assembled. 9th
22e in the figure is a recess into which the upper cylinder support base 10 fits.

FIG. 12 is a plan view of the second relay board 42. As shown in FIG. The center hole 42a is located at the center protrusion 2 of the upper cylinder 22.
Fits into 2d. Four sets of conductive patterns 43, 43, 43, 43 corresponding to the four heads are formed, and correspondingly four convex portions 42b, 42 are formed.
b, 42b, 42b are formed. Head relay member 40 and rotary transformer relay member 1
Since the directions of the connection terminals 21b and 21b of 8 are as shown in FIG.
e, 42d are formed. Therefore, as in the first embodiment, the relay board 42 will not be placed on the upper cylinder in the opposite direction, making soldering impossible.

In addition, since the relay board 42 is formed with a protrusion 42b, a recess 42e is formed, and after the relay board 42 is placed on the upper cylinder 22 and the soldering to each terminal is completed, the upper surface of the upper cylinder can be easily removed. A portion of the recess 45 is exposed. In this exposed recess 45, the dynamic balance can be measured after the rotary cylinder device is assembled, and a dream weight can be fixed and adjusted. Furthermore, since the screw hole 46 for adjusting the head height and the through hole 47 for adjusting the position of the head support stand are also exposed, adjustments can be made after the apparatus is assembled.
Incidentally, the through hole 48 is also a through hole for adjusting the position of the head support base.

(g) Effects of the invention As described above, according to the invention, there is no need to pass the lead wire through the rotating cylinder, so work efficiency is improved and it is suitable for automation of assembly work. Furthermore, since the second relay board is used, there is no need to bend the terminals after inserting them into the upper cylinder as in the prior art, which is suitable for automation of assembly work. Furthermore, since the first relay board and the rotary transformer relay member are positioned on the rotary disk, the first relay board and the rotary transformer relay member can be reliably connected. A rotary cylinder provided with a magnetic head and a head relay member is also positioned and fixed relative to the rotary disk. Therefore, the positional relationship between the head support base of the upper cylinder and the first relay board is determined accurately, and even when the cylinder is made smaller, if they are arranged offset in the rotational direction as in the embodiment, it is possible to
There is no risk that the pattern portion of the relay board will come into contact with the screws, etc. of the head support.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of the rotary cylinder device, and FIG. 3 is an exploded perspective view of the upper cylinder. 4 to 12 relate to the second embodiment, in which FIG. 4 is a front view of the lower cylinder portion, FIG. 5 is a plan view showing the first relay board, and FIG.
The figure is a front view of the relay member for the rotary transformer, FIG. 7 is a plan view of the relay member for the rotary transformer, FIG. 8 is a plan view of the upper cylinder, FIG. 9 is a view showing the lower surface of the upper cylinder, and FIG. 10 , FIG. 11 is a diagram showing the head relay member, and FIG. 12 is a plan view of the second relay board. 13 and 14 are perspective views showing a conventional example. DESCRIPTION OF SYMBOLS 10... Upper cylinder support base, 10b... Positioning groove, 11... Rotating shaft, 12... Rotor core, 13... Rotating disk, 16... First relay board, 16c... Positioning protrusion, 17... Conductive pattern, 18...Relay member for rotary transformer, 19a...Positioning protrusion, 20...Cylindrical connection portion, 21a...Bend connection terminal, 21b...Connection terminal, 22...Upper cylinder, H... ...Magnetic head, 22a, 22c...Through hole, 23, 42...
Second relay board, 24... Conductive pattern, 25...
Head support stand, 26... Conductive pattern, 28, 4
0...Relay member for head, 29a...Bending connection terminal, 29b...Connection terminal.

Claims (1)

[Claims for Utility Model Registration] A rotating cylinder to which a magnetic head is fixed and a fixed cylinder are provided, and signals are exchanged with the magnetic head by a rotor core fixed to the rotating cylinder and a stator core fixed to the fixed cylinder. A rotary cylinder device that operates via a rotary transformer, comprising: a rotary disk having the rotor core and fixed to a rotating shaft, to which the rotary cylinder is fixed; and a rotary disk fixedly positioned with respect to the rotary disk, the number of channels of the rotor core being fixed. a first relay board having a conductive pattern corresponding to the conductive pattern and to which the winding of the rotor core is connected; a first relay board positioned and fixed with respect to the rotary disk;
A pair of conductive members are embedded in the same number of cylindrical connecting portions as the number of channels, and the cylindrical connecting portions are provided between a bent connecting terminal that contacts the conductive pattern of the first relay board and a through hole of the rotary cylinder. a rotary transformer relay member whose connecting terminal projects from the top surface of the rotary cylinder when inserted and projects from the cylindrical connection portion; and a conductive pattern that supports the magnetic head and to which the head winding is connected. a head support base, and a head relay member in which a pair of conductive members are embedded and fitted and fixed in a through hole of the rotary cylinder adjacent to the head support base, the bending member being connected to the conductive pattern. A head relay member having a connecting terminal protruding from the upper surface of the rotary cylinder in a state where the connecting terminal and the rotary cylinder are fitted and fixed, and a connecting terminal protruding from the rotary cylinder; A rotary cylinder device comprising: a second relay board having a conductive pattern connecting the connecting terminal and the connecting terminal of the head relay member.