JP2007122782A - Head drum device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head drum device which can easily connect the terminals to the substrate side terminals of the rotating drum leaving enough margins for the layout of parts on the rotating drum substrate even if the increase of the number of the terminals makes their areas smaller on the head base substrate. <P>SOLUTION: This head drum device has a rotating drum board arranged along the plane orthogonal to the rotating axis of the drum having a drum face which forms a cylindrical surface, and a magnetic head sliding and contacting with the magnetic tape running on the drum surface of the above rotating drum to record or read signals on the magnetic tape. Two flexible boards 50<SB>U</SB>, 50<SB>B</SB>which are arranged with connecting ends misaligned one another on the side face 58as of the metal base 58 on which a plurality of magnetic head connection terminals electrically connected to the signal terminals of the magnetic head are overlaid and stuck, and connected to the rotating drum board by the rotating drum board connecting connector sections 53<SB>U</SB>, 53<SB>B</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a head drum device in which a method of connecting a magnetic head fixed to a rotating drum and recording or reproducing a signal using a magnetic tape to a substrate in the rotating drum is improved.

  A rotary drum device (head drum device) is used to record a signal on a magnetic tape, which is a tape-like magnetic recording medium, or to reproduce a signal on the magnetic tape. This rotating drum device is mounted on, for example, a drive device of a video tape recorder, and is configured as shown in FIG. 6, for example. FIG. 6A shows an outline of the magnetic tape drive device 1, and FIG. 6B shows the structure of the rotary drum device.

  The magnetic tape drum device 1 pulls out the magnetic tape 4 from the rotary drum device 2 and the tape cassette 3, and guide pins 5, 5 that wrap the drawn magnetic tape 4 around the rotary drum device 2 to form a predetermined tape path. , And a capstan shaft 9 for running the magnetic tape 4 in cooperation with the reel bases 7 and 7 supporting the reels 6 and 6 of the tape cassette 3 and the pinch roller 8.

  The rotary drum device 2 is disposed with its axis inclined slightly with respect to the chassis 10, and when the tape cassette 3 is mounted on the cassette mounting portion, the magnetic tape 4 is rotated by the guide pins 5, 5. The tape is pulled out to the side and wound around the rotary drum device 2, and the magnetic tape 4 is sandwiched between the pinch roller 8 and the capstan shaft 9 to form a tape path as shown.

  The rotary drum device 2 includes a fixed shaft 11 erected on the chassis 10, a rotary drum 12 rotatably supported by a bearing (not shown) with respect to the fixed shaft 11, and a bottom of the rotary drum 12. The fixed drum 13 is disposed on the side and fixed to the chassis 10, and the fixed drum 13 and the rotary drum 12 are opposed to each other with a predetermined gap therebetween. The rotating drum 12 is rotated by a motor (not shown).

  A plurality of notches (hereinafter referred to as “head arrangement holes”) 14, 14,... Are formed at the lower end edge of the rotary drum 12 with appropriate intervals in the circumferential direction. Are arranged with magnetic heads 15, 15,.

  In the so-called helical scan type apparatus using the rotating drum configured as described above, the magnetic head 15 mounted on the rotating drum 12 and the magnetic tape 4 are brought into contact with each other on the outer peripheral surface of the rotating drum 12 to record signals. Or playing.

In recent years, a magnetic head having a thin film head element on the end surface has a substantially flat shape with respect to the magnetic tape, and the sliding surface of the magnetic head with the magnetic tape floats from the drum surface regardless of the rigidity of the magnetic tape. For example, Japanese Patent Application Laid-Open No. H11-228707 discloses a technique for bringing the magnetic head and the magnetic tape into contact with each other by reducing the pressure.
JP 2003-242617 A

  FIG. 7 shows the configuration of the magnetic head disclosed in Patent Document 1 and the positional relationship of the magnetic head, the rotating drum, and the magnetic tape. The same parts as those in FIG.

  In FIG. 7, the magnetic head 15 is attached to the tip of a metal base 18 having a head base substrate 19 and is disposed in a rotating drum substrate (not shown). The tape sliding contact surface 16 of the magnetic head 15 is disposed in the head arrangement hole 14 so as to be located on the inner side (rotation shaft side) of the drum surface 2a of the rotary drum 12.

  The magnetic head 15 is affixed to a magnetic head affixing surface 18a at the tip of a metal base 18 having a predetermined thickness, and includes a wafer substrate 22 and a thin film element 20 stacked on one end thereof. Yes.

  In FIG. 7A, when the rotary drum 12 rotates, air enters between the drum surface 2a and the magnetic tape 4, and the magnetic tape 4 travels in a state of floating a predetermined amount with respect to the drum surface 2a. This is because an air layer is formed between the drum surface 2 a and the magnetic tape 4, and the pressure difference between the air layer and the atmosphere located between the magnetic tape 4 and the tape tension of the magnetic tape 4 is This is because the equilibrium state is maintained, and the magnetic tape 4 travels along the drum surface 2a of the rotary drum 12 with a predetermined flying height.

  In the portion of the magnetic tape 4 corresponding to the head arrangement hole 14, the air layer pressure is reduced by an amount corresponding to the increase in the cross-sectional area of the air layer in the portion.

  Further, since the magnetic tape 4 is wound around the rotary drum device 2 under a predetermined tension, the magnetic tape 4 travels in a straight path so as to fall into the head arrangement hole 14 by the tension. . The portion of the magnetic tape 4 facing the head arrangement hole 14 is attracted into the head arrangement hole 14 and comes into contact with the tape sliding contact surface 16 of the magnetic tape 15.

  Since the magnetic tape 4 is brought into contact with the magnetic head 15 by reducing the pressure in this way, the magnetic tape can be magnetized with a predetermined contact pressure or a higher contact pressure, regardless of whether the magnetic tape is a highly rigid magnetic tape or a low rigid magnetic tape. The head 15 can be stably contacted.

  In recent years, for example, a multi-channel magnetic head as shown in FIG. 8 is often used to realize a high recording density and a high transfer rate with a small number of components. Multi-channel means that there are two or more elements for recording or reproducing signals on one magnetic head, and simultaneous recording and reproduction can be performed, so that the transfer rate can be increased.

  FIG. 8 shows an arrangement example of the multi-channel specification magnetic head 15 and the rotating drum substrate, and the same parts as those in FIG. Reference numeral 31 denotes a magnetic head connection terminal, 32 denotes a drum substrate connection terminal, 33 denotes a rotating drum substrate, and 34 denotes a rotating drum substrate terminal.

    The drum substrate connection terminal 32 and the rotary drum substrate terminal 34 are connected by solder 36 via a wiring 35.

  However, as the number of channels increases, the number of terminals also increases. At the same time, the number of terminals on the head base substrate 19 from which signals are extracted (the number of magnetic head connection terminals 31 and drum substrate connection terminals 32) is also shown in FIGS. In order to increase as shown in (c), it is necessary to fit within a limited area, and the area of each terminal is inevitably reduced.

  The area of the rotating drum substrate 33 is also limited, and even if it is integrated by wiring using a flexible substrate that has already been proposed, connection with solder that has been performed so far becomes difficult.

  Even if integration with a flexible substrate is possible, if the number of channels increases, even if it is arranged with the lower limit dimension of the terminal width of the flexible substrate, it may not fit on the rotating drum substrate. Furthermore, since it is difficult to replace the magnetic head, workability is also deteriorated.

  The present invention has been made in view of the above points, and an object of the present invention is to be able to easily connect with the terminal on the rotating drum substrate side even if the number of terminals on the head base substrate is increased and the area of each terminal is reduced. Another object of the present invention is to provide a head drum device capable of providing a margin for component arrangement on a rotating drum substrate.

  In the present invention, in a multi-channel specification magnetic head, when the number of channels is large, a flexible substrate and a connector are used within the area of the rotating drum substrate, thereby enabling easy connection of terminals. When the number of channels further increases, the flexible substrate that comes into contact with the head base substrate is divided into a plurality of directions so that the width of the connection terminal is limited to be accommodated in the rotating drum substrate.

  That is, a head drum device according to the present invention for solving the above-described problems includes a rotating drum having a drum surface that forms a cylindrical surface, and a rotating drum substrate disposed along a surface orthogonal to the rotation axis of the rotating drum. A magnetic head for recording or reading signals on the magnetic tape while sliding on the magnetic tape running along the drum surface of the rotating drum, and a plurality of magnetic heads electrically connected to signal terminals of the magnetic head A head base substrate having a connection terminal and disposed on the rotary drum substrate; and a flexible substrate having one end attached to the magnetic head connection terminal and the other end connected to the connection terminal of the rotary drum substrate. It is characterized by having prepared.

  A connector terminal is formed at the other end of the flexible substrate.

  Further, the flexible substrate is characterized by comprising a plurality of flexible substrates in which one ends are overlapped.

(1) According to the first to eighth aspects of the present invention, since the plurality of magnetic head connection terminals and the rotary drum substrate are connected by the flexible substrate, the head base is increased when the number of channels of the magnetic head is increased. The area of the connection terminals (terminals for connecting to the rotating drum substrate) for one channel on the substrate is reduced, and it does not fall into the situation that the solder connection becomes difficult. Therefore, the number of channels of the magnetic head can be greatly increased.

In addition, since the head base substrate itself can be made small, it is possible to increase the number of channels by giving a margin to the component arrangement on the rotating drum substrate.
(2) According to the invention described in claim 2, it is possible to connect to the rotating drum substrate very easily without taking connection means such as solder. Further, since the connection with the rotating drum substrate is disconnected by removing the connector, the magnetic head can be easily replaced.
(3) According to the third and fourth aspects of the present invention, since the plurality of flexible boards are attached to the magnetic head connection terminal so as to overlap, the magnetic head connection terminal even if the number of channels of the magnetic head increases. However, the area required for the multi-channel wiring can be accommodated within the upper limit of the specification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments. First, FIG. 1 shows a structure and wiring example of a magnetic head when a thin film element is used. As shown in FIG. 1A, the magnetic head 15 using the thin film element is formed on the wafer substrate 122 with a predetermined dimension (thin film formation position 40).

  Many elements are arranged on the completed wafer substrate 122, and the wafer substrate 122 is cut out with the cut-out surface 41 as a boundary in the dimensions used for the magnetic head. Reference numeral 30 denotes a signal extraction terminal.

  The magnetic head 15 processed and cut out in this way is attached to the end of the metal base 48 in FIG. 1B in order to be mounted on the rotating drum. Magnetic head connection terminals 31 corresponding to the number of channels are provided on a side surface 48 as orthogonal to the head base substrate 49 at an end portion 48 a of the metal base 48 having a predetermined width (thickness). The signal extraction terminal 30 is connected by a wiring 35.

  The metal base 48 on which the magnetic head 15 configured as shown in FIG. 1B is mounted is disposed on the rotating drum substrate 33 as in FIG. 8A, for example.

  The connecting terminal on the rotating drum substrate 33 side (the rotating drum substrate terminal 34 in FIG. 8A) and the magnetic head connecting terminal 31 in FIG. 1 are a flexible substrate in which wiring is applied at a predetermined pitch as shown in FIG. 50 is connected.

In FIG. 2, first, one end of two flexible boards whose lengths are set so that the magnetic head connection terminal 31 is not hidden, that is, the upper flexible board 50 _U and the lower flexible board 50 _B are connected to each other on the metal base 48. The flexible substrate 50 is formed by overlapping and bonding only in the range 51 to be bonded to the side surface 48as. Reference numerals 52 _U and 52 _B denote connection ends provided so as not to overlap each other.

And the adhesion range 51 of the flexible substrate 50 after affixing is affixed on the magnetic head connection terminal 31 of the metal base 48 of FIG.1 (b). The other end of the flexible substrate 50 are rotating drum substrate connector section 53 (53 _U, 53 _B) is formed, which is a rotating drum substrate to be connected to the connection terminals of the (not shown) side.

  As a result, the signal of each channel of the magnetic head 15 is transmitted to the rotating drum substrate side via the signal extraction terminal 30, the wiring 35, the flexible substrate 50 and the rotating drum substrate connecting connector 53.

  In FIG. 1, since the head base substrate 49 and the side surface 48 as on which the magnetic head connection terminal 31 is formed have an angle different by 90 °, the flexible substrate 50 is bent at the boundary portion with the adhesion range 51. .

  Here, the metal base 48 may be thin depending on the conditions to be used. When the number of channels is small as shown in FIG. 3A, wiring is possible because the wiring pitch in the flexible substrate 50 has a margin. However, when the number of channels is increased as shown in FIG. 3B, there is a case where a single flexible substrate having a conventional structure cannot be wired to a limited thickness of the metal base 48 (FIGS. 1 and 2 in FIG. 3). The same parts are indicated by the same reference numerals).

  On the other hand, in the present invention, since the flexible substrate 50 in which the adhesion range 51 is overlapped and bonded is used, signal extraction of the multi-channel thin film element can be performed within a limited metal base width. Become.

That is, as shown in FIG. 4, the connection ends 52 _U and 52 _B of the two flexible substrates 50 _U and 50 _{B that} are stacked are shifted in the direction perpendicular to the width direction of the metal base 58. The dimension required for signal extraction of the thin film element does not exceed the width dimension of the metal base 58 (side surface 58as). In this way, by using two flexible substrates in an overlapping manner, the number of connectable channels can be doubled. Further, three or more flexible substrates may be used in a similar manner.

  4 shows only the metal base 58 and the flexible substrate 50 in a simplified manner. However, the structure is the same as that in FIG. 1, and the end portion 58a of the metal base 58 is formed in an inclined shape on one side. Yes.

  Further, in this embodiment, since the rotary drum board connecting connector portion 53 is provided as shown in FIG. 5 in order to transmit a multi-channel signal to the rotary drum board, the connection is facilitated.

  FIG. 5A shows a connection example when the number of channels is small, and FIG. 5B shows a connection example when the number of channels is large. The same parts as those in FIGS. 4 and 8 are denoted by the same reference numerals.

  As described above, by using the connection to the rotating drum substrate as a connector, the bonding surface between the flexible substrate and the metal base can be reduced from two to one. Further, the connection with the connector facilitates the connection to the rotating drum substrate without using a connection method such as solder.

  Therefore, multi-channel signals can be wired at the same time, and the process can be shortened.

  In addition, the rotating drum board connecting connector portion 53 sets the connecting direction freely in two or more directions as well as in one direction, and changes the terminal area of the rotating drum board.

  The present invention can also be applied to a magnetic head in which a protective plate having the same plane is attached to the thin film element side for recording or reproduction in a single-sided form.

1A and 1B show a magnetic head to which the present invention is applied and its peripheral configuration, in which FIG. 1A is an explanatory view showing an outline of manufacturing a magnetic head using a thin film element, and FIG. Figure. The principal part top view of one embodiment of this invention. The principal part front view of the magnetic head attachment part for demonstrating the relationship between the number of channels and the width | variety of a metal base. The embodiment of this invention is represented, (a), (b) is explanatory drawing of affixing a metal base and a flexible substrate, (c) is an arrow view of (b). Explanatory drawing of the principal part of one embodiment of this invention. The magnetic tape drive apparatus with which this invention is applied is represented, (a) is a schematic block diagram of a drive apparatus, (b) is a perspective view of a rotating drum apparatus. 1A and 1B show a conventional magnetic head and a rotary drum device, in which FIG. 1A is a schematic cross-sectional view of a main part showing the arrangement of the magnetic head, FIG. 2B is a perspective view of the magnetic head, and FIG. Figure. A conventional thin film magnetic head and its peripheral configuration are shown. (A) is a perspective view of the main part showing the arrangement of the thin film magnetic head and the rotating drum substrate, and (b) and (c) are examples of terminal arrangement on the base substrate. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Rotary drum apparatus, 2a ... Drum surface, 4 ... Magnetic tape, 12 ... Rotary drum, 13 ... Fixed drum, 14 ... Head arrangement | positioning hole, 15 ... Magnetic head, 16 ... Sliding contact surface, 18, 48, 58 ... Metal Base, 19, 49 ... Head base substrate, 20 ... Thin film element, 22, 122 ... Wafer substrate, 30 ... Signal extraction terminal, 31 ... Magnetic head connection terminal, 32 ... Drum substrate connection terminal, 33 ... Rotating drum substrate, 34 ... rotating drum substrate terminal, 35 ... wire, 36 ... solder, 48a, 58a ... end, 48as, 58as ... side, 50, 50 _U, 50 _B ... flexible substrate, 51 ... bonding range, 52 _U, 52 _B ... connection end , 53 _U , 53 _B ... Drum board connecting connector part.

Claims (8)

A rotating drum having a cylindrical drum surface;
A rotating drum substrate disposed along a plane orthogonal to the rotation axis of the rotating drum;
A magnetic head for recording or reading signals on the magnetic tape while sliding on the magnetic tape running along the drum surface of the rotating drum;
A plurality of magnetic head connection terminals electrically connected to signal terminals of the magnetic head, a head base substrate disposed on the rotating drum substrate;
A head drum device comprising: a flexible substrate having one end attached to the magnetic head connection terminal and the other end connected to the connection terminal of the rotating drum substrate. The head drum device according to claim 1, wherein a connector terminal is formed on the other end of the flexible substrate. The head drum device according to claim 1, wherein the flexible substrate includes a plurality of flexible substrates in which one ends are overlapped with each other. The head drum device according to claim 2, wherein the flexible substrate includes a plurality of flexible substrates in which one ends are overlapped with each other. 2. The head drum device according to claim 1, wherein the magnetic head connection terminal of the head base substrate is formed on a surface having a predetermined angle with respect to the rotating drum substrate. 3. The head drum device according to claim 2, wherein the magnetic head connection terminal of the head base substrate is formed on a surface having a predetermined angle with respect to the rotating drum substrate. 4. The head drum device according to claim 3, wherein the magnetic head connection terminal of the head base substrate is formed on a surface having a predetermined angle with respect to the rotating drum substrate. 5. The head drum device according to claim 4, wherein the magnetic head connection terminal of the head base substrate is formed on a surface having a predetermined angle with respect to the rotating drum substrate.

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