KR20040078856A - A spindle motor assembly for photo disk player - Google Patents

Abstract

PURPOSE: A spindle motor assembly for an optical disk player is provided to simplify a process of assembling a multilayer PCB where plural chip parts are mounted and a motor base plate for supporting a motor, thereby reducing a burden of a worker and improving working productivity. CONSTITUTION: A PCB(31) is mounted with plural chip parts(34) on an upper surface, and has plural pierced upper assembling holes(3a) and upper reference holes(36a). In a base plate(33), lower reference holes(36b) and lower assembling holes(3b) corresponding to the upper reference holes(36a) and the upper assembling holes(3a) are pierced in plural, and a mounting hole(37a) is pierced. An axis holder is fixed to the mounting hole(37a). A lower end of a rotational axis is rotatively assembled in the axis holder. An insulating film(2) is formed by applying an insulating layer to an upper surface of the base plate(33). A coupling unit couples the upper assembling holes(3a) with the lower assembling holes(3b), to integratedly assemble the PCB(31) into the base plate(33).

Description

Spindle motor assembly for optical disc player {A SPINDLE MOTOR ASSEMBLY FOR PHOTO DISK PLAYER}

The present invention relates to a spindle motor employed in an optical disc player, and more particularly, to reduce the manufacturing cost by simplifying the structure of coupling between a semiconductor substrate and a PCB plate on which a plurality of chip parts are mounted and a base plate on which a motor mechanism is supported. The present invention relates to a spindle motor assembly for an optical disk player that can be improved to improve workability.

In general, an optical disc player 100 such as LDP, CDP, CD-ROM, DVDP, DVD-ROM, etc., loads a disk (D) onto a turntable (T) by a loading mechanism, as shown in FIG. While clamping the mounting hole formed in the center of the disk (D) by clamping as a clamping unit chuck (110).

The disk D is rotated by an optical pickup unit (not shown) that rotates in one direction by a drive source of the spindle motor 120 as a driving means, while the disk D clamped to the chuck 110 is moved in one direction. A device for reproducing the information recorded in the.

The spindle motor 120 has a stator 121 in which a coil is wound and fixed to a shaft holder 121a, and a rotor case 122 in which a driving magnet 123 is mounted on an inner surface corresponding to the stator 121. And a rotating shaft 124 having an upper end fitted to the rotor case 122 and a lower end rotatably assembled to a bearing member (not shown) of the shaft holder 121a. Accordingly, the rotor case 122 is rotated by the electrical action of the stator 121 and the driving magnet 123, and the rotation shaft 124 is also rotated to rotate the disk D.

As the optical disc player 100 has been gradually developed from CD-ROM / RW to DVD-ROM / RW in recent years, not only the recording speed but also the recording capacity per disc is recorded at 650MB of the CD-ROM / RW. Spindle motor 120 that drives the disk (D) while greatly increasing to 4.7GB of ROM / RW requires high precision rotational performance and at the same time occupies the minimum space when mounting a portable notebook or CD player The assembly structure is also increasingly required to be complex and thin.

FIG. 2 is an assembly view showing a spindle motor assembly employed in a general optical disc player, and FIG. 3 is a flow chart of assembling the spindle motor assembly employed in a general optical disc player. As shown in FIG. On the base plate 133, due to the multifunctional and complex motor driving ICs, a plurality of semiconductor ICs, chip components 134, and connectors 135 are complex due to the complexity of contact and the necessity of mounting various circuits and chip components in a narrow space. The multilayer printed circuit board (hereinafter, referred to as PCB) 131 surface-mounted on the upper surface thereof was assembled by an adhesive method using a double-sided adhesive tape 132.

However, in the conventional assembly method, the upper adhesive surface of the double-sided adhesive tape 132 having a very thin thickness is attached to correspond to the lower surface of the PCB 131, and then the lower adhesive surface from which the protective paper (not shown) is separated. When adhesively assembled to correspond to the upper surface of the base plate 133, the worker adheres to both sides in accordance with the reference hole 136 and the motor mounting hole 137 formed through the PCB 131 and the base plate 133 It is very difficult to precisely attach the reference hole 136a and the through hole 137a of the tape 132 to each other, and in particular, the double-sided adhesive tape 131 on the lower surface of the narrow neck portion 131a of the PCB 131. ) Is very difficult to attach the work load of the worker, there was a problem that lowers the work productivity.

In addition, when foreign matter or dust is adsorbed on the adhesive surface of the double-sided adhesive tape 132 during the adhesive assembly operation, the adhesive strength is lowered and the gap between the PCB 131 and the base plate 133 is lifted, resulting in poor quality of the finished product. It was.

In addition, since the import cost of the double-sided tape 132 that is cut and processed according to the lower shape of the PCB 131 and specially processed according to the precise height regulation, there is a problem of increasing the manufacturing cost of the optical disc player 100.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, the object of which is to simplify the task of assembling the assembly between the multilayer printed circuit board on which a plurality of chip components are mounted and the motor base plate on which the motor is supported. The present invention aims to provide a spindle motor assembly of an optical disc player that can reduce the work load of a product, improve work productivity, prevent poor quality of the finished product, and reduce manufacturing cost.

1 is a cross-sectional view showing a spindle motor assembly employed in a general optical disc player;

2 is a plan view illustrating a spindle motor assembly employed in a general optical disc player;

3 is an assembly view showing a PCB and a base plate used in a spindle motor assembly for a general optical disc player,

4 is an assembly view showing a PCB and a base plate employed in the spindle motor assembly for an optical disc player according to the present invention;

Figure 5 is a longitudinal sectional view showing a part of the fastening means is assembled in the spindle motor assembly for an optical disk player according to the present invention.

Explanation of symbols on the main parts of the drawings

2 ....... insulating film 3 ....... fastening means

3a ...... upper assembly 3b ...... lower assembly

4 ....... Settling groove 31,131 ... PCB

33,133 ... Base plate 34,134 ... Chip parts

35,135 ... connector 36a ...... upper reference hole

36b ..... Lower reference hole 120 ...... spindle motor

As a technical configuration for achieving the above object, the present invention,

A spindle motor assembly comprising a stator wound with a coil, a rotor case equipped with a driving magnet on an inner surface corresponding to the stator, and a rotating shaft fitted with an upper end fitted to the rotor case to rotate and drive a disk clamped to the chuck.

A PCB having a plurality of chip components mounted on an upper surface thereof, and having a plurality of upper reference holes and upper assembly holes formed therethrough;

And a base plate through which the upper reference hole, the upper assembly hole and the lower reference hole and the lower assembly hole corresponding to each other are formed through, and the mounting hole to which the shaft holder, to which the lower end of the rotating shaft is rotatably assembled, is fixed.

An insulating layer is formed by applying an insulating layer to the upper surface of the base plate corresponding to the lower surface of the multilayer printed circuit board, and fastening means are fastened to the upper assembly hole of the PCB and the lower assembly work of the base plate. By providing a spindle motor assembly for an optical disc player, characterized in that the plate is integrally assembled.

Hereinafter, the present invention will be described in more detail.

Figure 4 is a plan view of the PCB and the base plate employed in the spindle motor assembly for an optical disc player according to the present invention, Figure 5 is a longitudinal sectional view showing a part of the fastening means is assembled in the spindle motor assembly for an optical disc player according to the present invention. .

4 and 5, the spindle motor assembly 1 of the present invention includes a PCB 31 on which a plurality of chip parts or connectors are mounted and a base plate 33 on which the spindle motor 120 is mounted. It is improved from the adhesive method to the fastening method so that it can be easily and quickly integrated into one.

That is, the PCB 31 penetrates a plurality of upper reference holes 36a which are a reference when assembling the base plate 33 on the upper surface on which a plurality of semiconductor ICs, chip parts 34 and connectors 35 are mounted. The through hole 37a through which the shaft holder 121a rotatably supports the lower end of the rotation shaft 124 of the spindle motor 120 is formed.

In addition, in the vicinity of the outer edge of the PCB 31, a plurality of upper assembly holes 3a through which the fastening means 3 for generating a fastening force when assembling the vertical plate with the base plate 33 are fastened.

In addition, the base plate 33 penetrates a plurality of lower reference holes 36b that coincide with the upper reference holes 36a of the PCB 31 so as to be a reference when assembling the PCB 33 on the upper surface thereof. In addition, the shaft holder 121a of the spindle motor 120 passing through the mounting hole 37a of the PCB 31 is formed to penetrate through another mounting hole 37b.

A plurality of lower assembly holes 3b through which the fastening means 3 for fastening the upper and lower layers of the PCB 31 and the fastening force are generated in the vicinity of the outer edge of the PCB 31.

On the other hand, the insulating film 2 is formed on the lower surface of the PCB 31 and the upper surface of the base plate 33 corresponding to each other by applying an insulating material made of epoxy resin or UV ink to a predetermined thickness.

Here, the insulating film 2 is applied to a predetermined thickness on the upper surface of the base plate 33 by stamping or printing.

The insulating film 2 has the same shape as the shape in which the PCB 31 is projected from the upper part to the lower part so as to electrically insulate between the lower surface of the PCB 31 and the upper surface of the base plate 33. It is preferable to apply.

In addition, the fastening means (3) is an upper assembly hole (3a) of the PCB 31 is disposed on the same vertical line during the vertical stacking to generate a fastening force for assembling the PCB 31 and the base plate 33 integrally ) And the lower assembly hole 3b of the base plate 33.

The fastening means 3 may be used by selectively employing a screw member for fastening the PCB 31 and the base plate 33 by a screw method or a rivet fastening by a riveting method.

In addition, the mounting groove 4 may be formed in the lower assembly hole 3b of the base plate 33 so that the head of the fastening means 3 disposed therein does not protrude to the outside.

In addition, the fastening means (3) is the same material as the metal material made of a metal material to perform the grounding role to protect the device from the leakage current or noise generated from the spindle motor 120 and the PCB 31 It consists of.

The operation of the present invention having the above-described configuration will be described.

A plurality of semiconductor ICs, chip components 34 and connectors 35 provide a rotational drive source for one-way rotational drive of the PCB 31 mounted on the upper surface and the disk D clamped to the chuck 110 when the power is applied. The operation of assembling the base plate 33 on which the spindle motor 120 is supported up and down is first performed by UV ink or epoxy resin on the lower surface of the PCB 31 and the upper surface of the base plate 33 corresponding to each other. The same insulating material is applied by stamping to form an insulating film 2 having a predetermined thickness, 20 to 30 μm, or an insulating material such as UV ink or epoxy resin is printed on the upper surface of the base plate 33 by printing. Next, it is dried to form an insulating film 2 having a predetermined thickness of 20 to 30 µm.

At this time, the shape of the insulating film 2 is the PCB 31 is mounted on the upper surface of the base plate 33 so as to completely insulate between the base plate 33 and the PCB 31 to ensure the product performance stably. It should be formed in the same way as the lower shape of.

In addition, the lower reference hole 36b of the base plate 33 and the lower assembly hole 3b of the base plate 33 are disposed on the lower side of the base plate 33 coated on the upper surface of the insulating film 2. The lower surface of the PCB 31 is seated on the upper surface of the insulating film 2 so as to be disposed on the same vertical line as the upper reference hole 36a and the upper assembly hole 3a of the 31.

Accordingly, the PCB 31 is stacked up and down with the base plate 33 with the insulating film 2 therebetween.

Subsequently, when the upper and lower reference holes 36a and 36b coincide with each other, the fastening means 3 such as a screw member or a rivet is fastened through the upper and lower assembly holes 3a and 3b. 31 and the base plate 33 can be integrally assembled.

According to the present invention as described above, an insulating film is formed on the upper surface of the base plate corresponding to the lower surface of the PCB by stamping or printing method, and the base plate on which the PCB and the spindle motor on which the chip parts are mounted is supported. Alternatively, by assembling by riveting, the work is simpler and simpler than the conventional adhesive method using a double-sided adhesive tape, thereby reducing the work load of the operator and improving the productivity of assembly work. The effect of reducing the manufacturing cost of the optical disc player is obtained by eliminating the use of the adhesive tape.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (7)

A spindle motor assembly comprising a stator wound with a coil, a rotor case equipped with a driving magnet on an inner surface corresponding to the stator, and a rotating shaft fitted with an upper end fitted to the rotor case to rotate and drive a disk clamped to the chuck. A PCB having a plurality of chip components mounted on an upper surface thereof, and having a plurality of upper reference holes and upper assembly holes formed therethrough; And a base plate through which the upper reference hole, the upper assembly hole and the lower reference hole and the lower assembly hole corresponding to each other are formed through, and the mounting hole to which the shaft holder, to which the lower end of the rotating shaft is rotatably assembled, is fixed. An insulating layer is formed by applying an insulating layer to the upper surface of the base plate corresponding to the lower surface of the multilayer printed circuit board, and fastening means are fastened to the upper assembly hole of the PCB and the lower assembly work of the base plate. Spindle motor assembly for an optical disc player, characterized in that the plate is integrally assembled. The method of claim 1, The insulating film is a spindle motor assembly for an optical disc player, characterized in that made of an insulating material made of epoxy resin or UV ink. The method of claim 1, The insulating film is a spindle motor assembly for an optical disc player, characterized in that the coating on the upper surface of the base plate with a predetermined thickness by stamping or printing (Printing) method. The method of claim 1, The insulating film is a spindle motor assembly for an optical disc player, characterized in that the coating is applied in the same shape as the shape projected from the upper portion to the lower portion. The method of claim 1, The fastening means is a spindle motor assembly for an optical disc player, characterized in that consisting of a screw member for fastening the PCB and the base plate by a screw method or a rivet fastening by a riveting method. The method of claim 1, And a mounting groove formed in the lower assembly hole of the base plate so that a head of the fastening means disposed therein does not protrude outward. The method of claim 1, The fastening means is a spindle motor assembly for an optical disc player, characterized in that composed of the same metal material as the base plate.