JP2012039723A - Actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator that requires a smaller installation space.SOLUTION: An actuator includes: a printed circuit board 1 that allows a predetermined conductive pattern to be printed thereon; current-carrying portions 2a and 2b that are printed on the printed circuit board 1 in coil-like patterns and generate magnetic force by energization; and a movable member that is supported through a bearing 5 rotatably with respect to the printed circuit board 1, has a disk-like member with magnetized surfaces to face the current-carrying portions 2a and 2b, and is driven and rotated by the magnetic force, as a driving force, generated by the current-carrying portions 2a and 2b.

Description

  The present invention relates to an actuator driven by magnetic force.

  An electronic device such as a personal computer is provided with various electronic components inside a casing, and usually includes an electronic component that generates heat, such as a CPU. Conventional electronic devices and the like are provided with a separate air blowing means such as a fan, for example, and the inside of the housing is overheated by electronic components that generate heat by blowing air from inside the housing to the outside or from the outside to the inside. It was comprised so that it might suppress.

  Such a blower fan normally includes a motor (brushless motor) having a rotating member to which blades can be attached, a magnet fixed to the rotating member, and a coil that can be energized as an actuator, and the coil is energized. Thus, the magnetic force is generated, and the blade is rotated by driving the rotary member by the repulsive force or the attractive force between the magnetic force and the magnetic force of the magnet of the rotary member. In addition, since this prior art does not relate to the literature known invention, there is no prior art document information to be described.

  However, in the above-described conventional actuators, like the blower fan motor, they are separately and independently disposed inside the electronic equipment and the like, so the installation space must be secured, and the housing of the electronic equipment and the like However, there was a problem that it had to be enlarged. Although it seems that the size of the entire electronic device can be avoided by downsizing the motor, there is a limit to the downsizing of the coil, particularly when the motor is configured separately.

  This invention is made | formed in view of such a situation, and is providing the actuator which can aim at reduction of an installation space.

  According to the first aspect of the present invention, a substrate on which a predetermined conductive pattern can be printed, a current-carrying portion that is printed in a coil shape on the substrate and that can generate a magnetic force by energization, and the substrate are disposed. And a movable member that is movable by obtaining a driving force with the magnetic force generated in the energization section.

  According to a second aspect of the present invention, in the actuator according to the first aspect, the movable member is rotatably supported with respect to the substrate and has a disk-like member that generates magnetism on a surface facing the energizing portion. The disk-shaped member can be driven to rotate by the magnetic force generated in the current-carrying portion.

  According to a third aspect of the present invention, in the actuator according to the second aspect of the present invention, a plurality of blades are formed on the disk-shaped member, and a fan capable of blowing air by rotational driving is configured.

  According to a fourth aspect of the present invention, in the actuator according to the first aspect, the energization part is printed in a substantially straight line on the substrate, and the movable member is movable along the energization part. It is characterized by that.

  According to a fifth aspect of the present invention, in the actuator according to any one of the first to fourth aspects, in addition to the current-carrying part, a predetermined electric circuit that is not related to the current-carrying part is printed on the substrate. It is characterized by comprising.

  According to the first aspect of the present invention, since the energization part for generating a driving force by generating magnetic force by energization is printed on the substrate in a coil shape, for example, an electric wire wound in a coil shape is used as the energization part. Compared to the conventional one, the actuator can be reduced in size, and the installation space can be reduced.

  According to the invention of claim 2, the movable member is formed of a disk-shaped member that is rotatably supported with respect to the substrate and generates magnetism on the surface facing the energizing portion, and the magnetic force generated in the energizing portion. Thus, the disk-shaped member can be rotationally driven, so that an actuator that can be rotationally driven with a simple configuration can be obtained.

  According to the invention of claim 3, since the plurality of blades are formed on the disk-like member and the fan capable of blowing air by rotational driving is configured, the fan can be downsized.

  According to the fourth aspect of the present invention, the energizing portions are printed in a substantially straight line on the substrate, and the movable member is movable along the energizing portion. It is possible to obtain an actuator capable of

  According to the invention of claim 5, since the predetermined electric circuit not related to the energization to the energization unit is printed on the substrate in addition to the energization unit, the printed circuit board functioning as another component is configured as the actuator. It can be shared as an element (substrate for forming a current-carrying part), and further miniaturization can be achieved.

The top view which shows the actuator which concerns on the 1st Embodiment of this invention Rear view showing the actuator III-III line sectional view in FIG. (A) Exploded perspective view showing the actuator (b) Perspective view showing a movable member in the actuator Schematic cross-sectional view through the insertion hole in the actuator board The disassembled perspective view which shows the actuator which concerns on the 2nd Embodiment of this invention. Schematic cross-sectional view of the actuator substrate The perspective view which shows the actuator which concerns on the 3rd Embodiment of this invention. The perspective view which shows the actuator which concerns on other embodiment of this invention. The perspective view which shows the actuator which concerns on further another embodiment of this invention.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The actuator according to the present embodiment functions as a motor (drive source) for air blowing means disposed in a housing of an electronic device such as a personal computer. As shown in FIGS. And a pair of current-carrying portions 2a and 2b that are printed in a coil shape on the surface of the printed circuit board 1 and capable of generating a magnetic force by current conduction, and are disposed opposite to the printed circuit board 1. The movable member 3 is mainly composed of a movable member 3 that can move (rotate and drive) by obtaining a driving force by the magnetic force generated in the energization units 2a and 2b.

  The printed circuit board 1 is made of a plate-like member capable of printing a predetermined conduction pattern on the front surface and the back surface, and an insertion hole 1a penetrating the front surface and the back surface is formed at a predetermined position. As shown in FIGS. 3 and 4, a bearing 5 (a general purpose bearing such as a ball bearing or a needle bearing) is inserted into the insertion hole 1 a, and the rotating shaft 4 is rotatably supported by the bearing 5. Has been. An E washer 6 is attached to the base end side of the rotating shaft 4 (the back side of the bearing 5) to prevent the rotating shaft 4 from coming off.

  The energization portions 2a and 2b printed on the surface of the printed board 1 with a conductive material are respectively formed in a spiral shape on both sides of the insertion hole 1a. One end of the energization part 2a is connected to the connection part a printed on the surface of the substrate 1, and the other end of the energization part 2a is connected to the connection part b printed on the back surface of the substrate 1, When a voltage is applied to the base end side of each of the connection part a and the connection part b, a current flows through the energization part 2a. Similarly, one end of the energization part 2b is connected to the connection part c printed on the surface of the substrate 1, and the other end of the energization part 2b is connected to the connection part d printed on the back surface of the substrate 1. When a voltage is applied to each of the base end sides of the connection part c and the connection part d, a current flows through the energization part 2b.

  Further, as shown in FIG. 5, current-carrying holes 1 b and 1 c are formed in a portion of the printed circuit board 1 where the current-carrying part 2 a and the current-carrying part 2 b are formed. Are formed with conductive portions 1ba and 1ca printed by a conductive material. The conduction part 2a and the tip of the connection part b, and the conduction part 2b and the tip of the connection part d are electrically connected through the conduction parts 1ba and 1ca, and conduction between the conduction part 2a and the conduction part 2b is achieved. It is like that. Thus, when a current flows through each of the energization unit 2a and the energization unit 2b (that is, when energization is attempted), the magnetic force (corresponding to each of the energization units 2a and 2b) on the front surface side and the back surface side of the printed board 1 Magnetic force) is generated.

  The movable member 3 according to the present embodiment is composed of a disk-shaped member that is rotatably supported with respect to the printed circuit board 1 and generates magnetism on the surface facing the energizing portions 2a and 2b. The disk-shaped member can be rotationally driven by the magnetic force generated in 2b. More specifically, the movable member 3 is fixed to and supported by a rotating shaft 4 that is rotatable by a bearing 5, and magnetic printing is performed on the back side (the side facing the printed circuit board 1). Thus, the magnetic printing unit 3a (see FIG. 4B) is formed, and magnetism is generated. Instead of such magnetic printing, a magnet may be fixed to the back side of the movable member 3, or the back side may be magnetized by a predetermined method to generate magnetism.

  And when each energizing part 2a and the energizing part 2b are energized and a magnetic force is generated, a repulsive force or attractive force between the magnetic force and the magnetism of the magnetic printing part 3a on the back surface side of the movable member 3 is caused. The movable member 3 is rotationally driven. That is, the movable member 3 is configured to obtain a driving force and rotate by the magnetic force generated in the energization portions 2a and 2b. The movable member 3 is formed with a plurality of blades (not shown) and constitutes a fan capable of blowing air by rotational driving.

  Further, the printed circuit board 1 is printed with a predetermined electric circuit (an electric circuit required for an applied electronic device) not related to the energization of the energization units 2a and 2b in addition to the energization units 2a and 2b. It may be a thing. In this case, a printed circuit board that functions as another component can be shared as a component of the actuator (substrate for forming the energization portion), and further miniaturization can be achieved. Of course, another electric circuit (for example, an electric circuit for controlling energization) related to energization of the energization portions 2a and 2b may be formed on the printed circuit board 1.

  According to the present embodiment, the movable member 3 is composed of a disk-like member that is rotatably supported with respect to the printed circuit board 1 and has magnetism generated on the surface facing the energizing portions 2a and 2b, and the energizing portion 2a. Since the disk-shaped member can be rotationally driven by the magnetic force generated in 2b, an actuator (motor in this embodiment) that can be rotationally driven with a simple configuration can be obtained. In particular, since a plurality of blades are formed on the disk-shaped member constituting the movable member 3 and a fan capable of blowing air by rotational driving is configured, the fan can be reduced in size.

Next, a second embodiment of the present invention will be described.
As in the first embodiment, the actuator according to the present embodiment functions as a motor (drive source) for a blowing unit disposed in a housing of an electronic device such as a personal computer, and is shown in FIGS. As described above, the first printed circuit board 1 and the second printed circuit board 7 (corresponding to the “substrate” of the present invention) and the surfaces of the first printed circuit board 1 and the second printed circuit board 7 are respectively coiled. The printed parts 2a and 2b and the energized parts 2c and 2d, which can generate magnetic force by energization, are arranged opposite to the second printed circuit board 7 and are generated in the energized parts 2c and 2d. The movable member 3 is mainly composed of a movable member 3 that can move (rotate and drive) by obtaining a driving force with a magnetic force. In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment, and those detailed description is abbreviate | omitted.

  The second printed circuit board 7 is printed in a stacked state in close contact with the surface of the first printed circuit board 1 and, as shown in FIG. 7, communication holes are formed in predetermined portions corresponding to the energizing portions 2c and 2d, respectively. 7b and 7c are formed. On the inner peripheral wall surfaces of the communication holes 7b and 7c, as shown in the figure, conductive portions f printed by a conductive material are respectively formed. The conductive portions 2a and the conductive portions 2a are energized through the conductive portions f. The part 2c, the energization part 2b, and the energization part 2d are electrically connected.

  An insertion hole 7a corresponding to the insertion hole 1a in the first printed board 1 is formed between the energization part 2c and the energization part 2d in the second printed circuit board 7, and the first printed circuit board 1 When the second printed circuit board 7 is laminated, the insertion hole 1a and the insertion hole 7a are in communication with each other, and the bearing 5 is inserted into the communication part. As a result, the energization parts 2a to 2d are formed in the thickness direction of the printed circuit boards (the first printed circuit board 1 and the second printed circuit board 7), and a sufficient magnetic force can be generated by energization, A relatively large driving force can be applied to the movable member 3. In the present embodiment, a two-layer structure of two substrates (first printed circuit board 1 and second printed circuit board 7) is used, but a three-layer structure or more may be used.

  Further, the first printed circuit board 1 or the second printed circuit board 7 has a predetermined electric circuit (necessary for an applied electronic device) in addition to the power supply units 2a to 2d and the power supply units 2a to 2d. Printed electric circuit) may be printed. In this case, a printed circuit board that functions as another component can be shared as a component of the actuator (substrate for forming the energization portion), and further miniaturization can be achieved. Of course, another electric circuit (for example, an electric circuit for controlling energization) related to energization of the energization portions 2a and 2b may be formed on the printed circuit board 1.

  According to the present embodiment, the movable member 3 is composed of a disk-shaped member that is rotatably supported with respect to the printed circuit board 1 and generates magnetism on the surface facing the energizing portions 2c and 2d, and the energizing portion 2a. Since the disk-shaped member can be rotationally driven by the magnetic force generated at ~ 2d, an actuator (motor in this embodiment) that can be rotationally driven with a simple configuration can be obtained. In particular, since a plurality of blades are formed on the disk-shaped member constituting the movable member 3 and a fan capable of blowing air by rotational driving is configured, the fan can be reduced in size.

Next, a third embodiment of the present invention will be described.
The actuator according to the present embodiment is composed of a linear motor or the like that obtains a substantially linear driving force. As shown in FIG. 8, the flexible substrate 8 having flexibility (corresponding to the “substrate” of the present invention). ), A coil 9 printed on the flexible substrate 8 and capable of generating a magnetic force by energization, and disposed opposite to the flexible substrate 8 and driven by the magnetic force generated by the energization unit 9. It is comprised from the magnet 10 as a movable member which can move by obtaining force.

  The energization unit 9 is printed on the flexible substrate 8 in a substantially straight line, and the magnet 10 as a movable member can be moved along the energization unit 9 by sequentially energizing the energization unit 9. Is. Thereby, an actuator capable of linear movement can be obtained with a simple configuration. As in the first and second embodiments, the flexible substrate 8 includes a predetermined electric circuit (necessary for an applied electronic device) that is not involved in energization of the energization unit 9 in addition to the energization unit 9. Printed electric circuit) may be printed. In this case, the printed circuit board (flexible substrate 8) that functions as another component can be shared as a component of the actuator (substrate for forming the energization portion), and further miniaturization can be achieved.

  However, as shown in FIG. 9, the flexible board 8 is bent and arranged in an arbitrary shape, and a rail L that follows the shape of the flexible board 8 is provided, and the movable board is guided by the rail L as a movable member. You may comprise so that the magnet 10 may move. In this case, the magnet 10 as a movable member can be moved along the energization unit 9 by sequentially energizing the energization unit 9.

  As shown in FIG. 10, the flexible substrate 8 is formed in an annular shape with the current-carrying portion 9 facing inward, and a magnet is formed on the outer peripheral surface of the rotating member 11 that is rotatably inserted in the annular shape. 10 may be provided. In this case, by sequentially energizing the energization unit 9, the rotation member 11 can be driven to rotate about the rotation shaft 11a, and can function as a motor as in the first and second embodiments. .

  Although the present embodiment has been described above, the present invention is not limited thereto, and may function as an actuator other than a motor of a blowing unit such as a fan or a linear motor, for example. In addition, in 1st, 2nd embodiment, although applied as a motor of a ventilation means, it is good also as a motor of another form. The energization part is composed of a conductive member printed on the front surface or the back surface of a substrate (printed substrate, flexible substrate, etc.), and may be any member that generates magnetic force by energization. Note that the nonmagnetic material may be fixed to a surface of the substrate opposite to the surface on which the movable member is disposed (in this embodiment, the back surface of the substrate).

  A substrate on which a predetermined conduction pattern can be printed, a coil printed on the substrate and capable of generating a magnetic force by energization, a magnetic force generated at the energization unit and disposed opposite to the substrate As long as the actuator is provided with a movable member that can move by obtaining a driving force, the actuator can be applied to one having a different external shape or one to which another function is added.

1 Printed circuit board (first printed circuit board)
2a, 2b energizing part 2c, 2d energizing part 3 movable member 4 rotating shaft 5 bearing 6 E washer 7 second printed circuit board 8 flexible substrate 9 energizing part 10 movable member 11 rotating member

Claims (5)

A substrate capable of printing a predetermined conduction pattern;
An energization part that is printed on the substrate in a coil shape and that can generate a magnetic force by energization;
A movable member that is disposed to face the substrate and is movable by obtaining a driving force by a magnetic force generated in the energization unit,
An actuator comprising:   The movable member is formed of a disk-shaped member that is rotatably supported with respect to the substrate and generates magnetism on a surface facing the current-carrying part, and the disk-shaped member is generated by the magnetic force generated in the current-carrying part. The actuator according to claim 1, wherein the actuator can be driven to rotate.   The actuator according to claim 2, wherein a plurality of blades are formed on the disk-like member, and constitutes a fan capable of blowing air by rotational driving.   2. The actuator according to claim 1, wherein the energization portions are printed in a substantially straight line on the substrate, and the movable member is movable along the energization portion.   The actuator according to any one of claims 1 to 4, wherein a predetermined electric circuit that is not related to energization of the energization unit is printed on the substrate in addition to the energization unit.

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