JP2010043575A - Ultracompact surface-mount fan motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultracompact surface-mount fan motor which includes a connection pin to satisfy its function in terms of mechanism and electricity and is automatically mounted on the upper surface of a substrate. <P>SOLUTION: A plurality of fans 5 are implanted around a rotor hub 4 fixed to a shaft 15. Fan portions are stored in a rectangular case 3. The root of the connection pin 2 is fixed to substantially the mid-sections of opposite side surfaces of the case 3. The width of the connection pin 2 is substantially two thirds of the width of the case 3. The distal end of the connection pin 2 overlies the pattern of the surface mount substrate and is electrically connected and firmly secured thereto by soldering or spot welding. This configuration permits automatic mounting onto the substrate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a substrate surface mounting of a fan motor having a shape and structure that can be mechanically and electrically surface mounted.

FIG. 13 shows the attachment of a general fan motor to the substrate.
The fan motor 79 has a mounting hole 81 and an electric signal cable 75 in the case 82. When the fan motor 79 is directly attached to the substrate (PCB) 77, the screw 80 is inserted into the attachment hole 81 of the case 82 and fixed with the nut 78. Or insert a rivet and fix it with a snap hook. The electric signal cable 75 is connected to an electric terminal of the substrate 77 by a connector 76.

Another example of a motor board mounting structure is shown in Patent Document 1 (small fan unit and brushless small DC motor) (Patent Document 1). In this example, a fan is mechanically attached to a substrate, and then the fan pins are soldered to the substrate. This is not surface mounting, but a structure in which pins attached to the fan motor are inserted into holes in the board and soldered from the opposite side of the fan motor.
Japanese Patent No. 4104747

  By the way, in a small device such as a cellular phone, in order to advance automation of component mounting, surface mounting components including mechanical components are required. However, the conventional mounting structure of the motor on the substrate cannot cope with surface mounting.

  An object of the present invention is to provide a surface mount ultra-small fan motor (hereinafter referred to as “surface mount fan motor”) that has a connection pin that satisfies the function both mechanically and electrically and can be automatically mounted on the upper surface of the substrate. ").

In order to achieve the above object, the invention according to claim 1 of the present invention includes a fan motor unit, a circuit board, a case for supporting the fan motor unit and the circuit board, and a fan motor mounted on the case. A plurality of connection pins connected to the surface of the surface mounting board for transmitting, and the plurality of connection pins transmit an electrical signal between the circuit board and the pattern of the surface mounting board surface and the case Is firmly fixed to the surface of the surface mounting substrate.
This configuration corresponds to, for example, FIG.
According to a second aspect of the present invention, in the first aspect of the present invention, the end of the connection pin is fixed substantially at the center of the side surface of the case, the middle portion extends straight downward, and the tip portion is The surface mounting board has a shape in contact with a pattern on the surface of the surface mounting substrate, and the tip is attached so as to be electrically conductive.
This configuration corresponds to, for example, FIG.
According to a third aspect of the present invention, in the first aspect of the present invention, the end of the connection pin is fixed substantially at the center of the side of the case, the middle is curved upward, and the tip is the surface mount. It is a shape in contact with the pattern on the substrate surface, and the tip is attached so as to be electrically conductive.
This configuration corresponds to, for example, FIG.
According to a fourth aspect of the present invention, in the first, second or third aspect, the case has a rectangular shape, and connection pins are respectively fixed to substantially central portions of the four side surfaces. .
This configuration corresponds to, for example, FIG.
According to a fifth aspect of the present invention, in the first, second, or third aspect, the case is rectangular, and a plurality of connection pins are respectively fixed to substantially the center portions of the facing side surfaces. It is characterized by that.
This configuration corresponds to, for example, FIG.
According to a sixth aspect of the present invention, in the first, second, or third aspect, the case has a rectangular shape, and two connection pins are arranged side by side and fixed in the vertical direction on each of the facing side surfaces. One of the pins is attached to one of the two surface mounting boards disposed above and below, and the other of the two connection pins is attached to the other of the two surface mounting boards disposed above and below.
This configuration corresponds to, for example, FIG.
According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, the case is provided with a locking portion, and the locking portion is engaged with an air circulation opening provided in the surface mounting substrate. It stops and positions a fan motor.
This configuration corresponds to, for example, FIG.
According to an eighth aspect of the present invention, in the first to fifth aspects of the present invention, a snap hook is provided in a part of a side surface of the case, and the snap hook is provided in an air circulation opening provided in the surface mounting substrate. And the fan motor is positioned.
This configuration corresponds to FIG.
A ninth aspect of the present invention is characterized in that, in the fourth to eighth aspects of the invention, the rectangular case has a vertical and horizontal dimension of approximately 10 mm and a thickness of approximately 2 mm.
According to a tenth aspect of the present invention, in the invention according to any one of the first to fourth and sixth to ninth aspects, the lateral dimension of the connection pin is approximately half or more the width of the side surface of the case. It is characterized by having.
According to an eleventh aspect of the present invention, there is provided a circuit board, a fan motor unit attached to the circuit board, an end portion of the circuit board, and a housing unit for housing the fan motor unit. A plurality of connection pins connected to the surface of the surface mounting board for mounting the circuit board, and the plurality of connection pins transmit electrical signals between the circuit board and the surface mounting board surface pattern. The case is firmly fixed to the surface of the surface mounting substrate.
According to a twelfth aspect of the present invention, in the invention according to the eleventh aspect, the circuit board has a rectangular shape, and the connection pins are provided corresponding to the respective side surfaces of the circuit board.
Claims 11 and 12 correspond to FIG.

  According to the above configuration, the fan motor that has been conventionally considered as a mechanical component and could not be surface-mounted has become a component that can be surface-mounted. This has made it possible to automate the mounting of the fan motor on the surface mounting board. For example, it is possible to automate the mounting of a surface mount fan motor having a thickness in the range of 8 to 12 mm and a thickness in the range of 1.8 to 2.5 mm on the surface mounting substrate of the mobile phone, thereby reducing the manufacturing cost of the mobile phone. Can be realized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 and FIG. 2 are a front view and a side view showing an embodiment of a surface mount fan motor according to the present invention, and FIG. 2 shows a state mounted on a surface mount substrate 6.
This example is an axial fan motor having a connection pin for surface mounting, and the connection pin has two functions of electrical and mechanical.

  A plurality of fans 5 are implanted around the rotor hub 4 fixed to the shaft 15. This fan portion is accommodated in a rectangular case 3. The base portion of the connection pin 2 is fixed to the approximate center of the side surfaces of the case 3 facing each other. The width of the connection pin 2 is approximately 2/3 of the case 3, and extends slightly laterally from the case fixing portion 2a, the intermediate portion 2b extends downward approximately 45 degrees from that portion, and the tip portion 2c thereof in the horizontal direction. The orientation is changed and placed on the pattern 6 b of the surface mounting substrate 6. The tip portion 2c is electrically coupled to the pattern 6b of the surface mounting substrate 6 by soldering, spot welding or the like and firmly fixed.

  Thereby, the surface mounting fan motor 1 is electrically connected to the pattern 6b of the surface mounting substrate 6 and mechanically fixed. For example, if one of the connection pins 2 is positive for the fan motor power supply and the opposite connection pin 2 is GND, the lead wire, which has been conventionally required, is omitted, and the surface mounting substrate 6 is electrically connected. It becomes possible. 6a is an opening for air circulation. The connection pin 2 is integrally formed when the case is formed.

FIG. 3 is a partially broken cross-sectional view showing details inside the case.
The rotor hub 4 is fixed to the shaft 15, and the fan 5 is implanted around the rotor hub 4. The bearing 12 is inserted and fixed to the bearing housing 14, and a shaft 15 is rotatably inserted into the bearing 12. The coil 11 is disposed outside the bearing housing 14. A circuit board 17 on which the electronic component 10 is mounted is provided below the coil 11. The connection pin 2 has a connection portion 2 d that is bent approximately 90 degrees from the fixing portion 2 a and extends downward, and the tip of the connection portion 2 d is electrically connected by solder 16.

FIG. 4 is a diagram showing the positional relationship between the circuit board and the case of the fan motor in FIG.
On the rib portion 3a of the case, a circuit board 17 having a smaller width than the rib portion 3a is arranged as shown in FIG. This prevents the air flow passage 13 from being blocked. This figure is omitted except for the circuit board 17 and the case 3.

FIG. 5 is a side view of a surface mount fan motor showing another embodiment of the shape of the connection pin. This is applied to a centrifugal fan, and the connection pin 20 is shaped as shown in FIG.
That is, the fixing portion 20a of the connecting pin 20 that extends slightly horizontally from the side surface of the case 21 extends upward at a substantially right angle, and further, the portion bent at a substantially right angle and extending horizontally is the curved portion 20b. A portion that bends approximately 45 degrees at the end of the curved portion 20b and reaches the surface mounting substrate 22 is an inclined portion 20c, and a tip portion 20d is formed in the horizontal direction at the end of the inclined portion 20c, whereby the connection pin 20 is connected. It is configured. The tip portion 20 d is electrically connected to the pattern 22 a of the surface mounting substrate 22. The reason for this shape is that the connection pin 20 absorbs vibration due to fan imbalance and the like.

FIG. 6 is a front view of a surface mount fan motor showing an embodiment in which a connection pin is provided on each side surface of the case.
Connection pins 24, 24, 24, and 24 are fixed to four side surfaces of a case 27 that accommodates a fan motor unit including a fan 25 and a rotor hub 26, respectively. The width of each connection pin is about 2/3 of the width of the fan side surface.
FIG. 7 is a front view of a surface-mount fan motor showing an embodiment in which five connection pins are provided on two side surfaces of the case.
Three connection pins 30, 30, 30 are fixed to one of the facing side surfaces of the case 31 that accommodates the fan motor unit including the fan 33 and the rotor hub 32, and two connection pins 30, 30 are fixed to the other side surface. The width of each connection pin is reduced to about 1/5 of the width of the side surface.
As shown in FIGS. 6 and 7, by increasing the number of connection pins, it is possible to monitor fan rotation signals, acceleration, humidity, and temperature sensor outputs, and to input PWM control signals.
However, for acceleration, humidity, and temperature, the sensor must be incorporated into the fan circuit board.

FIG. 8 is a side view of a surface mount fan motor showing an embodiment in which a connection pin is connected to two surface mount substrates.
The connection pins 35 and 36 are fixed to the side surfaces of the case 39 facing each other. There are 4 in total. The connection pins 35 and 36 are fixed side by side in the height direction of the side surfaces. The connection pins 35 are fixed to the pattern 35a of the lower surface mounting substrate 37 by soldering or the like.
The connection pins 36 and 36 are fixed to the pattern 36a of the surface mounting substrate 38 by soldering or the like. The width of the connection pin is about 2/3 of the width of the case side surface.
In this way, electric signals can be input / output to / from different surface mounting substrates, and the mechanical strength of the mounting increases. The openings 37a and 38a are holes for air circulation.

FIG. 9 is a side view of a surface mount fan motor showing an embodiment when a surface mount board positioning guide is attached to the case.
A locking projection 49 is provided on the lower surface of the case 47. In addition to the air circulation opening 48a, the surface mounting substrate 48 is provided with a hole 48b for fitting the locking projection 49.
When the fan motor is mounted on the surface mounting board 48, the fan motor is positioned by locking the locking projection 49 in the hole 48b. The connection pins 46 are fixed to the pattern 48c by soldering or the like.

FIG. 10 is a side view of a surface mount fan motor showing an embodiment in which a part of a connection pin is used as a snap hook for a surface mount positioning guide.
The connection pins 50 and 50 are fixed to the side surfaces of the case 51 facing each other. Further, snap hooks 53, 53 are attached. The snap hooks 53 and 53 are elastic members and have repulsive properties, and their tip portions have a dogleg shape for locking.
The opening 52b of the surface mounting substrate 52 is larger than the shape of the bottom surface of the case 51, and the U-shaped portions of the snap hooks 53, 53 are fitted to the edge portion, thereby positioning the case.

FIG. 11 is a partial cross-sectional side view of a surface-mount fan motor showing another embodiment of a method for connecting a connection pin and a fan circuit board.
A rotor hub 64 is fixed to the shaft 69, and a fan 65 is implanted around the rotor hub 64. The bearing 72 is inserted and fixed to the bearing housing 74, and the shaft 69 is rotatably inserted into the bearing 72. A coil 73 is disposed outside the bearing housing 74. A circuit board 66 on which the electronic component 70 is mounted is provided below the coil 73. The connection pin 62 is bent at a substantially right angle from the fixed portion 62a, a connection extension 62d is extended at the lower portion, and further, a connection portion 62e is formed by bending at a substantially right angle. The connecting portion 62e is electrically connected by the solder 61.
The connection structure of the connection pin and the fan circuit board is different from FIG.

FIG. 12 is a front view and a side view of a surface-mount fan motor showing another embodiment in which a fan case is not used. It is the example which applied the connection pin as an airflow path.
The circuit board 41 has air flow passages at three locations, and supports the stator support base portion 41d by the three stays 41a, 41b and 41c. Two engagement grooves 41 e and 41 e are provided on each side of the circuit board 41.
A fan motor unit is formed by the rotor unit 44 including the fan 44a and the like and the stator unit 45.

The stator portion 45 is fixed to the stator support base portion 41 d at the center of the circuit board 41. The connection pin has a wall portion 40a extending in the vertical direction, a circuit mounting portion 40b that is bent at a substantially right angle from the wall portion 40a to form a plane portion, an inclined portion 40c extending downward from the circuit mounting portion 40b with an inclination of about 45 degrees, and an inclination The connecting portion 40d extends in the horizontal direction from the portion 40c. Protrusions 40e and 40e are provided near both ends of the circuit mounting portion 40b.
The four sides of the circuit board 41 are respectively mounted on the circuit mounting portions 40b of the connection pins 40, 40, 40, 40, and are engaged and fixed to the engagement grooves 41e, 41e of the sides by the protrusions 40e, 40e.
A housing portion for housing the fan motor portion is formed by the wall portion 40a of the connection pin 40 in the four directions. Even in such a configuration, the connection pin has two functions as an electric signal transmission and a mechanism member.

The surface dimensions of the surface mount fan motor according to the present invention are, for example, 10 mm in length and width and 2.2 mm in thickness.
As a circuit board for the fan motor, a board having the following shape and material is used.
A thin substrate or an FPC substrate (flexible substrate) with a thickness of 0.5 mm or less. Further, as the material of the fan material and the connection pin, for example, a material made of the same thermosetting resin and copper alloy as that of the semiconductor is used.
In the above embodiment, the connection pin width is 3/4, 1/2, and 1/5 of the width of the case side surface. However, the connection pin width is not limited to this. . In addition, the bent shape is also typically shown in the examples of FIGS. 2, 5, and 12, but the bent shape may be another curved shape.

  This is a fan motor for mounting on a substrate surface used in small devices such as mobile phones.

It is a front view which shows embodiment of the surface mount fan motor by this invention. It is a side view which shows embodiment of the surface mount fan motor by this invention. It is a partially broken sectional view which shows the detail of the inside of a case. It is a figure which shows the positional relationship of a circuit board and a case. It is a side view of the fan motor for surface mounting which shows other embodiment of the shape of a connection pin. It is a front view of the fan motor for surface mounting which shows an embodiment at the time of providing a connecting pin in each side of a case. It is a front view of the fan motor for surface mounting which shows an embodiment at the time of providing five connection pins on two side surfaces of a case. It is a side view of the fan motor for surface mounting which shows an embodiment in case a connecting pin is connected to two sheets of surface mounting substrates. It is a side view of the fan motor for surface mounting which shows an embodiment at the time of attaching a surface mounting substrate positioning guide to a case. It is a side view of the fan motor for surface mounting which shows an embodiment at the time of using a part of connection pin as a snap hook for a positioning guide for surface mounting. It is a partial cutaway sectional view of a surface-mount fan motor showing another embodiment of a method for connecting a connection pin and a fan circuit. It is the front view and side view of the surface mount fan motor which show other embodiment which does not use a fan case. It is a figure for demonstrating the mounting structure of the conventional fan motor.

Explanation of symbols

1 Fan motor for surface mounting
2, 20, 24, 30, 35, 36, 40, 46, 50, 62 Connecting pins
3, 21, 27, 31, 39, 41, 47, 51, 63 cases
4, 26, 32, 64 Rotor hub
5, 25, 33, 42, 65 fans
6, 37, 38, 43, 48, 52 Surface mount substrate 7, 9, 67, 71 Yoke 8, 68, 69 Magnet 10, 70 Electronic components (driving IC, sensor, etc.)
DESCRIPTION OF SYMBOLS 11, 73 Coil 12,72 Bearing 13 Air flow path 14,74 Bearing housing 16,61 Solder 15 Shaft 17,41,66 Circuit board 44 Rotor part 45 Stator part

Claims (12)

A fan motor section;
A circuit board;
A case for supporting the fan motor unit and the circuit board;
A plurality of connection pins fixed to the case and connected to the surface of the surface mounting substrate for mounting the fan motor;
The plurality of connection pins transmit an electrical signal between the circuit board and a pattern on the surface of the surface mounting board and firmly fix the case to the surface of the surface mounting board. Ultra-small fan motor.   The connection pin has an end fixed to substantially the center of the side surface of the case, an intermediate portion extending straight downward, and a tip contacting the surface mounting substrate surface pattern, the tip 2. The surface mount micro fan motor according to claim 1, wherein the portion is mounted so as to be electrically conductive.   The connection pin has an end fixed at substantially the center of the side surface of the case, an intermediate portion curved upward, and a tip portion in contact with a pattern on the surface mounting substrate surface. 2. The surface mount micro fan motor according to claim 1, wherein the surface mount micro fan motor is mounted so as to be electrically conductive. The case is rectangular,
4. The surface mount ultra-small fan motor according to claim 1, wherein connection pins are respectively fixed to substantially central portions of the four side surfaces. The case is rectangular,
4. The surface mount ultra-small fan motor according to claim 1, wherein a plurality of connection pins are respectively fixed to substantially central portions of the facing side surfaces. The case is rectangular,
Two connecting pins are fixed side by side in the vertical direction of each facing side,
One of the two connection pins is attached to one of the two fan motor mounting boards disposed above and below, and the other of the two connection pins is attached to the other of the two fan motor mounting boards disposed above and below. The ultra-small fan motor for surface mounting according to claim 1, 2 or 3. A locking portion is provided on the case,
7. The surface mount ultra-small fan motor according to claim 1, wherein the engagement portion is engaged with an air flow opening provided on the surface mount substrate to position the fan motor. Provide a snap hook on a part of the side of the case,
6. The surface mount micro fan motor according to claim 1, wherein the snap motor is engaged with an air flow opening provided on the surface mount substrate to position the fan motor.   9. The surface mount ultra-small fan motor according to claim 4, wherein the rectangular case has a vertical and horizontal dimension of approximately 10 mm and a thickness of approximately 2 mm.   10. The surface-mounting ultra-small fan motor according to claim 1, wherein a dimension of the connecting pin in a lateral direction is approximately half or more than a width of a side surface of the case. . A circuit board;
A fan motor attached to the circuit board;
An end portion of the circuit board is mounted, a housing portion for housing the fan motor portion is provided, and a plurality of connection pins connected to the surface of the surface mounting substrate for mounting the fan motor are provided.
The plurality of connection pins transmit an electrical signal between the circuit board and a pattern on the surface of the surface mounting board and firmly fix the case to the surface of the surface mounting board. Ultra-small fan motor. The circuit board is rectangular,
12. The surface mount ultra-small fan motor according to claim 11, wherein the connection pins are provided corresponding to the respective side surfaces of the circuit board.

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