JPH04370514A - Motor wiring connection part for rotary head drum device - Google Patents

Abstract

PURPOSE:To attain manpower saving by making a wiring connection part only a member formed by integrating a main part and a wiring pattern into one body. CONSTITUTION:In the motor wiring connection part of a rotary head drum device 1, since the connection terminal 26 of a stator base board 25 and the wiring pattern 32 and the base edge part 32a of a connection member 27 are soldered in the notched hole 31 of the connection member 27, the height of the device 1 is prevented from becoming unnecessarily high. Besides, the number of parts for connection can be managed with one piece of the connection member 27, and further, soldering can be completed by a process of one time. Thus, the manpower saving can be attained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor wiring connection for a novel rotary head drum device. Specifically, by devising the wiring structure for power supply to the motor of the rotary head drum device, it is possible to reduce the height of the rotary head drum device, reduce the number of parts, and reduce the number of soldering steps. The present invention aims to provide a novel motor wiring connection section for a rotating head drum device.

0002

2. Description of the Related Art FIGS. 6 to 8 show an example of a motor wiring connection portion of a conventional rotary head drum device.

A is a rotating head drum device, b is a lower drum, and c is an upper drum.

The lower drum b is fixed to a chassis (not shown), and has a bottomed cylindrical shape with a large circular recess d opening on its upper surface, and a fixed shaft is attached to a boss e fixed at the center of the lower drum b. f is erected.

[0005] The upper drum c also has a bottomed cylindrical shape having a large circular recess g opened in its upper surface, and a supported cylinder h is formed in the center thereof vertically penetrating therethrough. Then, the ball bearings i, which are fixed to the middle part of the fixed shaft f with a slight distance vertically from each other, are fitted inside the supported cylinder h, and the upper drum c is rotated about the fixed shaft f. freely supported.

j is a head base attached to the lower surface of the upper drum c, k is a magnetic head supported at the tip of the head base j, and the tip of the magnetic head k is attached to the lower drum b,
It protrudes slightly from the outer peripheral surface of the upper drum c.

l is a coreless type motor placed above the upper drum c, and includes a rotor o consisting of a magnet m fixed to the upper drum c and a back yoke n, and a stator p fixed to the fixed shaft f. Consists of.

q is a thin plate-shaped support plate, which is fixed to the inner bottom of the recess g of the upper drum c, and an annular magnet m is fixed to the upper surface of the support plate q. The back yoke n also has an annular shape, and its outer peripheral edge is fixed to the upper opening edge of the recess g of the upper drum c.

[0009] The stator p consists of a disc-shaped stator board, and on the bottom surface of the stator board, multi-phase coils (not shown) are arranged, and on the top surface, there are conductors (not shown) connected to the above-mentioned coils, etc. A pattern is formed,
The connection ends of the conductor pattern are grouped and exposed at a position near the center.

r, r, . . . are "L"-shaped terminal pins, which are soldered to the connection ends of the above-mentioned conductor patterns.

[0011] s is a guide protector made of synthetic resin, and is approximately plate-shaped, with a large opening t formed near the proximal end, and a flat surface between the opening t and the tip. It is defined as a recessed portion u.

The base end of the guide protector s is fixed to the upper end of the fixed shaft f, so that the guide protector s is positioned above the back yoke n at a slight distance from the back yoke n. Located opposite to each other. The upper end portions r'', r', . . . of the terminal pins r, r, . . . are positioned within the opening t of the guide protector s through the opening n' of the back yoke n.

v is a flexible circuit board on which a plurality of wiring patterns w, w, . . . are formed, and
A plurality of insertion holes x, x, . . . are formed along the arc-shaped base edge of the flexible circuit board v, and the connection ends w′, w′, . . . of the wiring patterns w, w, . * are exposed at the opening edges of the insertion holes x, x, . . .

A portion of the flexible circuit board v near the base end is positioned within the recess u of the guide protector s, and the terminal pins r, r, etc. are inserted into the insertion holes x, x, . The upper ends r', r', ... are inserted, and in that state, the upper ends r', r of the terminal pins r, r, ... are inserted.
',... and the connection end of the wiring pattern w, w,... w'
, w', . . . are soldered to y, y, .

In this way, the stator board p of the motor l and a control circuit (not shown) are connected via the flexible circuit board v.

Since the portion of the flexible circuit board v close to the upper end of the upper drum c is passed through the recess u of the guide protector s, there is no possibility of an accident of bending downward and coming into contact with the rotating upper drum c. Prevented.

[0017]

However, the motor wiring connection portion of the conventional rotary head drum device described above has several problems.

First, the terminal pins r, r, . . . are made to protrude upward, and the upper ends r', r', . Since the connecting ends w', w', . . . are connected by soldering, the height becomes high, which is not preferable. In particular, since there are many variations in the swells of solder y, y, . . . , there is a problem in that the height of the rotary head drum device a varies. In particular, for VTRs, etc., which aim to downsize the device by placing the rotating head drum device in a recess formed on the front surface of the tape cassette, the height of the rotating head drum device becomes high or the height varies. This is a fatal flaw.

Furthermore, the motor wiring connection portion of the rotary head drum device has two locations for soldering, which is undesirable in terms of both time and reliability.

Furthermore, in addition to the guide protector s, a flexible circuit board v, terminal pins r, r, . The problem is that it costs a lot of money.

[0021]

[Means for Solving the Problems] Therefore, in order to solve the above problems, the motor wiring connection portion of the rotating head drum device of the present invention is provided with a fixed shaft fixed to the upper end of the fixed shaft that rotatably supports the upper drum. and an extension part projecting laterally from the fixing part are integrally formed of an insulating material, and a wiring pattern reaching the tip of the extension part is formed on the upper surface of the main part having a notch hole, and the wiring A connecting member is provided in which the base end of the pattern is placed on the side surface of the notch hole so as to reach from the top end to the bottom end, and the base end of the wiring pattern and the conductor pattern of the motor are connected within the notch hole of the connection member. The ends are soldered.

[0022]

[Operation] Therefore, in the motor wiring connection part of the rotary head drum device of the present invention, the only necessary part is the connection member in which the main part and the wiring pattern are integrally formed, so that the work, storage, and transportation are troublesome. It is possible to save labor by reducing the amount of time required.

Furthermore, since the soldering point is only between the base end of the wiring pattern located along the side surface of the notch hole and the connection end of the motor conductor pattern, labor is saved and reliability is improved.

Furthermore, since the soldering is performed between the base end of the wiring pattern located on the side surface of the notch hole and the connection end of the conductor pattern, the solder does not swell upward, and therefore, rotation is prevented. This eliminates the possibility that the height of the head drum device becomes higher than planned.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Details of the motor wiring connection portion of the rotary head drum device of the present invention will be explained below according to the embodiments shown in the accompanying drawings.

Reference numeral 1 in the figure shows a rotary head drum device to which the motor wiring connection portion of the rotary head drum device is applied.

Reference numeral 2 denotes a lower drum (fixed drum), which has a cylindrical shape with a closed bottom and a closed lower end. A boss portion 3 is provided in the center of the lower drum 2, a support hole 4 is formed in the center of the boss portion 3, and a lower end portion of a fixed shaft 5 is press-fitted into the support hole 4. . In addition, the outer peripheral surface 6 of the lower drum 2
A guide lead 7 for guiding a magnetic tape (not shown) is formed in the magnetic tape.

Reference numerals 8 and 8 denote ball bearings, which are supported at the intermediate portion of the fixed shaft 5 so as to be slightly spaced apart from each other vertically.

Reference numeral 9 denotes an upper drum (rotating drum) rotatably supported at the intermediate portion of the fixed shaft 5, which includes a main portion 10 having a substantially bottomed cylindrical shape and a main portion 10 fixed to the center portion of the main portion 10. It consists of a boss member 11.

The boss member 11 is a supported portion 11 having a cylindrical shape.
a and a thick flange portion 11b protruding outward from the lower end of the supported portion 11a.
A is inserted from below through an insertion hole 10a formed in the center of the main part 10, and a plurality of screws 12 (only one is shown in the figure) by the main part 10
and the boss member 11 are coupled.

A plurality of head placement recesses 14 (only one is shown in the figure) reaching the outer peripheral surface 13 are formed on the lower surface of the main portion 10 of the upper drum 9, and each head placement recess 14 has a A head base 15 is arranged and fixed, and a magnetic head 16 is adhesively fixed to the tip of the head base 15. The tip of the magnetic head 16 slightly protrudes from the outer peripheral surface 13 of the upper drum 9.

The supported portion 11a of the boss member 11 of the upper drum 9 is press-fitted onto the ball bearings 8, 8 supported by the fixed shaft 5, so that the upper drum 9 is supported by the fixed shaft 5. It is rotatably supported via ball bearings 8, 8 in the middle part of. In this state, the portion of the outer circumferential surface 6 of the lower drum 2 above the guide lead 7 and the outer circumferential surface 13 of the upper drum 9 are flush with each other.

17 is a motor for rotating the upper drum nine times;
It consists of a rotor fixed to the upper surface of the upper drum 9 and a stator fixed to the upper end of the fixed shaft 5.

Reference numeral 18 denotes a rotor, which includes a thin plate-shaped support plate 19 and a magnet 2 fixed to the upper surface of the support plate 19.
0 and a back yoke 21 located apart above the magnet 20.

A hole 19a is formed in the center of the support plate 19, and the upper end of the supported portion 11a of the boss member 11 of the upper drum 9 is inserted into the hole 19a. It is fixed by a plurality of screws 22 (only one is shown in the figure). The magnet 20 has an annular shape and is fixed to the upper surface of the support plate 19 by adhesive or the like. The back yoke 21 is also formed in an annular shape from a magnetically permeable material, and its outer peripheral edge is fitted into an annularly extending notch edge 23 formed inside the upper end opening of the main portion 10 of the upper drum 9. and is fixed in that state by adhesive or the like.

Reference numeral 24 designates a small disk-shaped seat plate, and a supported hole 24a is formed in the center of the seat plate.
Two screw holes 24b, 24b are formed at positions sandwiching a. Then, the supported hole 24a of the seat plate 24 like this
The upper end of the fixed shaft 5 is press-fitted into the upper end of the fixed shaft 5, thereby fixing the seat plate 24 to the upper end of the fixed shaft 5.

25 is a stator of the motor 17;
It is formed as a stator substrate. The stator board 2
A small hole 25a is formed in the center of 5, and a plurality of phase drive coils (not shown) are provided on the bottom surface of the hole 25a. A plurality of conductor patterns (not shown) connected to the drive coils are formed on the upper surface of the stator board 25.
The connection ends 26, 26, . . . of the conductor pattern are connected to the hole 2.
They are arranged in an arc at a position close to 5a and are exposed. Note that through holes 25b, 25b are formed in the stator board 25 at positions sandwiching the hole 25a.

The stator board 25 is fixed to the seat plate 24 between the magnet 20 and the back yoke 21, facing each other with a slight gap therebetween. Note that details of the means for fixing the stator board 25 to the seat plate 24 will be described later.

A coreless motor 17 is constituted by the rotor 18 and stator 25 arranged as described above.
Then, the connection ends 26, 2 of the conductor pattern of the stator 25
6, . . . face upward through the hole 21a of the back yoke 21.

[0040] Reference numeral 27 denotes a connecting member, which consists of a main part made of synthetic resin and a wiring pattern integrally supported by the main part.

Reference numeral 28 denotes a main portion, in which a fixing portion 29 and an extending portion 30 protruding outward from the fixing portion 29 are integrally formed of synthetic resin. A hole 29a is formed in the center of the fixing portion 29, and mounting holes 29b, 29b are further formed on both sides of the hole 29a. In addition, the fixed part 2
A notch hole 31 extending in an arc shape is formed at the boundary between the extension portion 9 and the extension portion 30 .

32, 32, . . . are wiring patterns that are integrally connected to the main portion 28 by so-called insert molding, and extend approximately in the longitudinal direction of the upper surface of the extension portion 30 of the main portion 28. The base end portions 32a, 32a, . . . are arranged so as to reach the lower end of the side surface 31a of the notch hole 31 on the side of the extension portion 30.

Thus, the connecting member 27 is positioned such that its fixed portion 29 is overlapped with the center portion of the stator board 25, and its hole 29a is externally fitted onto the upper end portion of the fixed shaft 5. Fixing part 29 of connecting member 27
mounting holes 29b, 29b, insertion hole 2 of stator board 25
The screws 33 and 33 inserted in sequence through 5b and 25b are attached to the seat plate 2.
4, thereby fixing the stator board 25 and the connecting member 27 to the upper end of the fixed shaft 5.

When the stator board 25 and the connecting member 27 are fixed to the upper end of the fixed shaft 5 in this way, the connecting member 27
The connection end 26 of the stator board 25 through the notch hole 31 of the
26,... are in a state facing upward, and the connection end 26
, 26, . . . and the wiring patterns 32, 3 of the connecting member 27
The base end portions 32a, 32a, . . . of 2, . Further, the tip end 30a of the extending portion 30 of the connecting member 27 is in a state of protruding outward from the position of the outer circumferential surface 13 of the upper drum 9.

Therefore, the wiring pattern 3 of the connecting member 27
2, 32, . . . and the connection ends 26, 26, . . . of the stator board 25 are soldered 3.
4, 34, ... are attached.

35 is a flat cable for connection, 36 is a connector attached to the end of the flat cable 35, and this connector 36 is connected to the extending portion 3 of the connecting member 27.
The wiring patterns 32, 32, . . . of the connecting member 27 are connected to the control circuit via conductors (not shown) of the flat cable 35. Therefore,
The conductor pattern (not shown) provided on the stator 25 of the motor 17 is connected to the wiring patterns 32, 32 of the connection member 27.
, . . . are connected to the control circuit via a flat cable 35. In this way, the tip end 30a of the extending portion 30 of the connecting member 27 functions as an edge connector.

As described above, in the motor wiring connection portion of the above-described rotary head drum device, the connection ends 26, 26, . .
Since the base ends 32a, 32a, . . . of the wiring patterns 32, 32, . Nothing happens. Furthermore, only one connection member 27 is required for connection, and the soldering process only needs to be performed once.

Note that 37 is a rotary transformer, which transmits signals to the rotating magnetic head 16 during recording, and transmits signals read by the magnetic head 16 during reproduction, and is connected to the stator side fixed to the lower drum 2. transformer 37a
and the rotor side transformer 37 fixed to the lower surface of the upper drum 9.
It consists of b.

[0049]

Effects of the Invention As is clear from the above description, the motor wiring connection portion of the rotating head drum device of the present invention is rotatably supported by the intermediate portion of the fixed shaft erected at the center of the lower drum. A head is supported at the lower end of the upper drum, and a rotor consisting of an annular magnet and a back yoke fixed to the upper end of the upper drum faces the rotor with a predetermined clearance between these magnets and the back yoke. A stator fixed to the upper end of the fixed shaft so as to be positioned at the upper end of the fixed shaft forms a motor for rotating the upper drum, and the stator has a plurality of coils facing the magnet and a stator connected to the coils and positioned at the upper surface. It consists of a stator board provided with a conductor pattern, the connection end of the conductor pattern is exposed at the center of the stator board, a fixed part fixed to the upper end of the fixed shaft, and an extension projecting laterally from the fixed part. A wiring pattern reaching the tip of the extension part is formed on the upper surface of the main part, the extension part being integrally formed of an insulating material and having a cutout hole facing the part where the connection ends of the conductor pattern are arranged, and the wiring pattern reaching the tip of the extension part. A connecting member is provided with the base end of the wiring pattern on the side surface of the notch hole so as to reach from the upper end to the lower end, and the base end of the wiring pattern and the connecting end of the motor conductor pattern are connected in the notch hole of the connecting member. It is characterized by being soldered.

[0050] Therefore, in the motor wiring connection part of the rotary head drum device of the present invention, the only necessary part is the connection member in which the main part and the wiring pattern are integrally formed, so that the trouble of work, storage, and transportation is reduced. It is possible to save labor by reducing the amount of time required.

Further, since the soldering point is only between the base end of the wiring pattern located along the side surface of the notch hole and the connection end of the motor conductor pattern, labor is saved and reliability is improved.

Furthermore, since the soldering is performed between the base end of the wiring pattern located on the side surface of the notch hole and the connection end of the conductor pattern, the solder does not swell upward, and therefore, rotation This eliminates the possibility that the height of the head drum device becomes higher than planned.

It should be noted that the specific shapes and structures shown in the above embodiments are merely examples of embodiments of the present invention, and the technical scope of the present invention should not be construed as limited by these. It is not something that will be done.

[Brief explanation of drawings]

FIG. 1 is an enlarged perspective view of an embodiment of a motor wiring connection section of a rotary head drum device according to the present invention, with essential parts thereof being exploded.

FIG. 2 is an enlarged perspective view of main parts.

FIG. 3 is an enlarged longitudinal sectional view of the rotary head drum device.

FIG. 4 is an enlarged plan view with a portion of the rotary head drum device cut away.

FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4 and further enlarged.

FIG. 6 is an enlarged perspective view showing an example of a motor wiring connection portion of a conventional rotary head drum device with its main parts exploded.

FIG. 7 is an enlarged longitudinal sectional view of the rotary head drum device.

FIG. 8 is an enlarged plan view of the rotary head drum device.

[Explanation of symbols]

1 Rotating head drum device 2 Lower drum 5 Fixed axis 9 Upper drum 16 Head 17 Motor 18 Rotor 20 Magnet 21 Back yoke 25 Stator (board) 26 Connection end (of conductor pattern) 27 Connection member 28 Main part 29 Fixed part 30 Extension part 31 Notch hole 31a Side 32 Wiring pattern 32a Base end 34 Solder

Claims (1)

[Claims] Claim 1: A head is supported at the lower end of the upper drum, which is rotatably supported at the middle part of a fixed shaft erected at the center of the lower drum, and an annular head is fixed to the upper end of the upper drum. A rotor consisting of a magnet and a back yoke, and a stator fixed to the upper end of the fixed shaft so as to be positioned facing each other with a predetermined clearance between these magnets and back yoke, are used to rotate the upper drum. forming a motor, the stator comprising a stator board having a plurality of coils facing the magnet and a conductor pattern connected to the coils and located on the upper surface;
The connection end of the conductor pattern is exposed at the center of the stator board, and a fixed part fixed to the upper end of the fixed shaft and an extension part protruding laterally from the fixed part are integrally formed of an insulating material. A wiring pattern reaching the tip of the extension part is formed on the upper surface of the main part having a notch hole opposite to the part where the connection ends of the conductor pattern are arranged, and the base end of the wiring pattern is connected to the side surface of the notch hole. a connecting member arranged so as to reach from the upper end to the lower end, and the base end of the wiring pattern and the connecting end of the motor conductor pattern are soldered within the notch hole of the connecting member. Head drum device motor wiring connection.