KR20170014340A

KR20170014340A - Motor

Info

Publication number: KR20170014340A
Application number: KR1020150107492A
Authority: KR
Inventors: 한만승; 홍성렬; 문성철; 전승환
Original assignee: 주식회사 고아정공
Priority date: 2015-07-29
Filing date: 2015-07-29
Publication date: 2017-02-08
Also published as: KR101726698B1

Abstract

A motor capable of stably forming an electrical connection between a circuit board and a coil is disclosed.
The motor includes a stator through which a coil is wound; A circuit board provided on an upper portion or a lower portion of the stator with one surface thereof facing the stator and having an opening; And a metal connection bracket fixed to the other surface of the circuit board and having one side electrically connected to the circuit pattern of the circuit board and the coil, wherein the connection bracket has one side connected to the circuit pattern, A base portion resting on the other surface; And a connection portion connected to the base portion at a predetermined angle with the base portion and to which the coil passed through the opening portion is connected.

Description

Motor {MOTOR}

The present invention relates to a motor, and more particularly, to a motor capable of stably forming an electrical connection between a circuit board and a coil.

A motor is a device that converts electric energy into mechanical energy and obtains rotational force. It is widely used for home electronic products as well as industrial devices. Generally, a motor includes a stator accommodated in a motor housing, a coil wound around the stator, a rotor disposed inside or outside the stator and rotating by electromagnetic interaction with the stator, and a PCB provided on one side of the stator. .

Circuit patterns are printed on the PCB, various circuit elements such as a PWM driver IC, resistors and capacitors are mounted, and an electric signal is applied to the coil of the stator to control the operation of the rotor. In order for an electrical signal to be applied to the stator coil by the PCB, the electrical connection between the PCB and the stator coil must be established. Normally, the end of the coil is soldered to the connection portion of the PCB circuit pattern.

However, when the coil is soldered directly to the circuit pattern, the surrounding circuit elements may be damaged due to the high temperature of the soldering iron. In addition, since the coil is soldered to a planar circuit pattern, it is difficult to maintain a proper lead amount for accurate electrical connection and stable fixing, and if the soldering failure occurs, the electrical connection and fixing between the coil and the circuit pattern are not properly performed .

Furthermore, in order to make the motor more compact and compact, in order to efficiently use the internal space of the motor, if the interval between the stator and the PCB is narrowed, it is necessary to draw the coil through the PCB Do. Conventionally, there is no structure for holding the drawn portion of such a coil, and the workability at the time of soldering is low, and a high degree of skill is required. Further, even after the soldering is completed, the drawn portion of the coil may move to break the soldered portion and cause connection failure.

Patent Document 1: Published Patent Application No. 10-2009-0074131 (published on July 6, 2009)

Embodiments of the present invention provide a motor having a connection structure of a substrate and a coil that can firmly fix a drawn portion penetrating a PCB of a coil while not directly soldering a coil to a circuit pattern of the PCB.

According to an aspect of the present invention, there is provided a stator comprising: a stator through which a coil is wound; A circuit board provided on an upper portion or a lower portion of the stator with one surface thereof facing the stator and having an opening; And a metal connection bracket fixed to the other surface of the circuit board and having one side electrically connected to the circuit pattern of the circuit board and the coil, wherein the connection bracket has one side connected to the circuit pattern, A base portion resting on the other surface; And a connection part connected to the base part at a predetermined angle with the base part and connected to the coil passing through the opening part.

In this aspect, the connection portion may be formed to be perpendicular to the base portion in connection with one end of the base portion.

Further, at the end of the connecting portion, the coil can be received by being recessed toward the base portion.

Further, the coil may be soldered to the connection groove.

The connection bracket may further include a clip portion connected to an end portion of the connection portion and capable of being compressed and holding the coil.

The circuit board may further include a protrusion provided along at least a part of an edge of the opening and protruding from the other surface of the circuit board. The connection bracket may be disposed such that one surface of the connection portion contacts the one side surface of the protrusion. have.

Further, a guide groove recessed toward the circuit board is formed at an end of the protrusion, and the coil is accommodated in the guide groove when the coil is connected to the connection bracket.

Effects of the motor according to the present invention will be described as follows.

According to embodiments of the present invention, since the coil is connected to a separate connection bracket electrically connected to the substrate, the coil need not be soldered directly to the circuit pattern of the substrate. Further, when the drawn-out portion of the coil is seated on the connection bracket, the drawn-out portion of the coil can be firmly fixed, so that the electrical connection between the coil and the substrate can be stably formed.

1 is a perspective view of an internal structure of a motor according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the internal structure of FIG. 1 taken along line AA '. FIG.
3 is an enlarged perspective view of the connection bracket of FIG.
FIG. 4 is a view showing a protrusion of FIG. 1 viewed from one side.
5 is a view illustrating a connection bracket included in a motor according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a motor including a circuit board according to an embodiment of the present invention will be described with reference to Figs. 1 to 4. Fig.

FIG. 1 is a perspective view of an internal structure of a motor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the internal structure of FIG. 1 taken along line A-A '.

1 and 2, the motor 1 includes a motor housing 10 forming an outer surface of a motor, a rotor 110 and a stator 120 accommodated in the motor housing 10, A circuit board 210 for controlling the motor 1 and a connection 130 for connecting the coil 140 wound on the stator 120 to the circuit board 210. [ And may include a bracket 300.

The stator 120 may be in the form of a hollow shell and may be fixed to the motor housing 10. The stator 120 may have a hollow space for receiving the rotor 110 at the center thereof. The stator 120 may include a plurality of teeth protruding radially inward, and the plurality of teeth may be spaced apart from each other along the circumferential direction of the stator 120. The coils 140 may be wound on each tooth. The coil 140 is electrically connected to a circuit board 210 to be described later and can receive a voltage. When a voltage is applied, the coil 140 may generate an electromagnetic field that interacts with the permanent magnets of the rotor 110.

The rotor 110 may be disposed in the inner space of the stator 120 as described above. The rotor 110 may comprise permanent magnets and is configured to be electromagnetically interacting with the coils 140 wound on the stator 120 through such permanent magnets. A shaft 130 is inserted and fixed to the center of the rotor 110, and the shaft 130 can rotate together with the rotor 110. One end of the shaft 130 may protrude outward through an opening formed in the motor housing 10. Further, if necessary, the shaft 130 can be supported by the motor housing 10 through a bearing or the like.

The circuit board 210 may be electrically connected to the coil 140 wound on the stator 120 to apply an electric signal to the coil 140. In accordance with the electrical signal of the circuit board 210, the operation of the rotor 110 can be controlled. Various circuit elements 31 such as a driver IC, a resistor and a capacitor are mounted on at least one surface of the circuit board 210 and a circuit pattern 32 for electrically connecting the circuit elements 31 is formed . In one example, the circuit board 210 may be a printed circuit board (PCB) on which a circuit pattern is printed.

The circuit board 210 may be installed on the upper portion or the lower portion of the stator 120. Here, the upper and lower portions of the stator 120 may refer to both ends of the shaft 130 with respect to the axial direction. Herein, the upper and lower sides will be referred to based on the states shown in Figs. 1 and 2.

1 and 2, the circuit board 210 may be installed on the opposite side of the stator 120 from the side on which the shaft 130 of the rotor 110 is drawn. 1 and 2, the shaft 130 is formed to extend downward, and the circuit board 210 is installed on the upper portion of the stator 120. Alternatively, when the shaft 130 is configured to be pulled upward, the circuit board 210 may be installed under the stator 120.

As another example, the circuit board 210 may be provided on the side from which the shaft 130 of the rotor 110 is drawn with respect to the stator 120. In this case, a through hole (not shown) through which the shaft 130 is inserted may be formed at the center of the circuit board 210.

The circuit board 210 may be positioned to substantially contact one end of the stator 120. That is, a separate space may not be formed between the circuit board 210 and the stator 120. The circuit element 31 and the circuit pattern 32 may be provided on one side of the circuit board 210 and the circuit board 210 may have the circuit element 31 and the circuit pattern 32 mounted thereon And may be disposed on the opposite side of the stator 120. A circuit element such as a hall sensor may be mounted on the opposite surface of the circuit board 210, that is, the surface facing the stator. In this case, a separate space may not be formed between the stator 120 and the circuit element such as the Hall sensor.

Electrical connection between the circuit board 210 and the coil 140 is required for the circuit board 210 to apply an electric signal to the coil 140 of the stator 120. In this case, when there is substantially no clearance space between the circuit board 210 and the stator 120, the coil 140 is drawn through the circuit board 210 to the upper portion of the circuit board 210, 210 to the circuit board 210 at the upper surface. For this purpose, the circuit board 210 may be provided with an opening 211 through which the coil 140 can pass. According to the embodiment shown in FIGS. 1 and 2, the opening 211 may be formed by partially cutting the edge of the circuit board 210. In this case, the opening 211 may be formed along the edge of the circuit board 210.

A protrusion 220 may be formed around the opening 211. Specifically, the protrusion 220 is provided along at least a part of the edge of the opening 211, and may be formed so as to protrude from the upper surface of the circuit board 210, that is, the surface opposite to the stator 120. The protrusion 220 may have a predetermined width and height and may extend along the edge of the opening 211. The protrusion 220 may be provided on the upper surface of the circuit board 210 or inserted into the opening 211 to be brought into close contact with the side surface of the opening 211.

The protrusions 220 may be formed of plastic, separately formed and then bonded to the circuit board 210 using an adhesive or the like. Alternatively, it may be formed by ejecting the circuit board 210 in a heterogeneous manner.

The projecting portion 220 may form a step on one surface of the circuit board 210 around the opening 211. 1 and 2 show an example in which protrusions 220 are formed on only a part of the edge of the opening 211 on the side of the circuit board.

The coil 140 passing through the opening 211 can be drawn up to the upper side of the circuit board 210 and connected to the circuit board 210 through the metal connection bracket 300. The connection bracket 300 may be electrically connected to the circuit pattern 32 formed on the circuit board 210 by being fixed to the upper surface of the substrate, that is, the surface opposite to the surface facing the stator 120. For example, the connection bracket 300 may be fixed on the circuit pattern 32 formed on the upper surface of the circuit board 210. The connection bracket 300 can be soldered onto the circuit pattern 32. [ Alternatively, it may be attached via a conductive adhesive. A coil 140 may be connected to one side of the connection bracket 300 electrically connected to the circuit pattern 32 so that the coil 140 may be electrically connected to the circuit pattern 32. [

The metal forming the connection bracket 300 may be a metal having high electrical conductivity such as copper. However, the material of the connection bracket 300 is not limited thereto, and it is a matter of course that the material can be changed to various materials by the user if the material is a conductive material.

FIG. 3 is an enlarged perspective view of one example of the connection bracket, and FIG. 4 is a view illustrating a protrusion viewed from one side.

Referring to FIG. 3, the connection bracket 300 may include a base portion 310 and a connection portion 320.

The base 310 is connected to the circuit pattern 32, and one surface of the base 310 can be placed on the upper surface of the circuit board 210. For example, the base portion 310 may be a metal plate-like member, and the bottom surface thereof may be in contact with the circuit board 210. The bottom surface of the base 310 overlaps with the circuit pattern 32 formed on the upper surface of the circuit board 210 so that the electrical connection between the circuit pattern 32 and the connection bracket 300 can be achieved.

The connection part 320 may be connected to the base part 310 to form a predetermined angle with the base part 310 to which the coil 140 is connected. For example, the connection portion 320 may be a metal plate member connected to one end of the base portion 310 and formed perpendicularly to the base portion 310. In this case, if the bottom surface of the base portion 310 is placed on the upper surface of the circuit board 210, the connection portion 320 can protrude above the circuit board 210. The coil 140 wound on the stator 120 may be electrically connected to the connection part 320 through the opening part 211. [ For example, the coil 140 may be soldered on the connection 320 or physically held by the connection 320. [ Alternatively, the coil 140 may be spot welded to the connection 320.

The connection portion 320 and the base portion 310 may be made of the same material to form an integral member. For example, one metal plate may be bent into a connection bracket 300 including a connection portion 320 and a base portion 310 by being bent through a press process or the like.

According to one embodiment, as shown in FIG. 3, a connection groove 330 may be formed at an end of the connection part 320, in which the coil 140 can be received. Specifically, the connection groove 330 may be recessed from the upper end of the connection portion 320 toward the base portion 310, that is, concave toward the lower portion. The coil 140 wound on the stator 120 may be drawn to the upper side of the circuit board 210 after passing through the opening 211 and may be seated in the connection groove 330. According to the example, the soldering 141 can be performed with the coil 140 mounted on the connection groove 330. Since the connection groove 330 is formed, the connection between the coil 140 and the connection bracket 300 can be stably formed.

Meanwhile, the connection bracket 300 may be fixed to the circuit board 210 at a position adjacent to the edge of the opening 211. In particular, the connection portion 320 connected to one end of the base portion 310 may be disposed and fixed so as to face the opening portion 211. Specifically, the connection bracket 300 may be positioned in close contact with the protrusion 220 formed along the edge of the opening 211. For example, when the connection part 320 is formed perpendicular to the base part 310, the outer surface of the connection part 320 contacts the side surface of the protrusion part 220 and the bottom surface of the base part 310 contacts the upper surface of the circuit board 210 The connection bracket 300 can be disposed in contact with the connection bracket 300. As a result, the connection bracket 300 can be seated at an edge formed between the protrusion 220 and the circuit board 210. Since the connection portion 320 is stably supported by the protrusion 220, .

Referring to FIG. 4, a guide groove 221 may be formed at the end of the protrusion 220 to receive the coil 140. The guide groove 221 may be recessed toward the circuit board 210 from the upper end of the protrusion 220, that is, downwardly toward the bottom, that is, toward the circuit board 210. The coil 140 may be connected to the connection portion 320 of the connection bracket 300 while being accommodated in the guide groove 221 as shown in FIG. 4 after passing through the opening 211. The guide groove 221 can support the coil 140 in the lateral direction when the coil 140 is connected to the connection bracket 300 and can finally hold the drawn portion of the coil 140 . In addition, the guide groove 221 can prevent the coil 140 from being hooked on the edge of the protrusion 220.

According to an example, the bottom surface of the guide groove 221 may be formed closer to the circuit board 210 than the bottom surface of the connection groove 330. That is, according to FIG. 4, the bottom surface of the guide groove 221 may be located below the bottom surface of the connection groove 330. In this case, the coil 140 is stably received in the guide groove 221, and the coil 140 is caught in the guide groove 221, so that the connection between the receiving groove and the coil 140 can be prevented from being hindered.

4, the width of the guide groove 221 is slightly larger than the diameter of the coil 140. Alternatively, the width of the guide groove 221 may be substantially equal to the diameter of the coil 140 . In this case, the coil 140 can be inserted into the guide groove 221, and the guide groove 221 can support the coil 140 more stably. Further, the guide groove 221 may have a recessed shape, such as a circular shape, rather than a recessed shape as shown in Fig. 4.

The base 310 and the connection 320 of the connection bracket 300 are electrically connected to the circuit board 210 and the coil 140 so that the circuit board 210 and the coil 140 can be electrically connected to each other . In this case, the coil 140 and the circuit pattern 32 can be electrically connected without directly soldering the coil 140 to the circuit pattern 32. The base 310 of the connection bracket 300 protrudes upward from the circuit board 210 so that the coil 140 drawn upward from the circuit board 210 through the opening 211 is naturally Can be connected to the connection portion 320 and the durability of such connection can be improved. That is, when the coil 140 is directly soldered to the upper surface of the circuit board 210 as in the conventional art, the coil 140 drawn upward from the opening 211 must be bent downward toward the circuit board 210 , The bending has caused breakage of the coil 140 itself or the soldered portion. Further, in order to place the bent coil 140 in place and solder it requires a high degree of proficiency and has poor workability. The connecting portion 320 of the connecting bracket 300 protrudes upward so that it is not necessary to bend the coil 140 downward when the coil 140 is connected to the circuit board 210, The workability can be significantly improved as compared with the case where the coil 140 is directly brought into contact with the circuit board 210 and soldered.

Furthermore, by forming the connection groove 330 in which the coil 140 can be seated in the connection part 320, workability can be further improved. By forming the guide groove 221 capable of supporting the coil 140 in the lateral direction on the protrusion 220, not only the workability can be improved, but also the drawn portion of the coil 140 after the connection is completed It is possible to remarkably reduce the possibility of occurrence of connection failure.

Hereinafter, a motor including a circuit board according to another embodiment of the present invention will be described with reference to FIG. FIG. 5 illustrates a connection bracket included in a motor according to another embodiment of the present invention.

Referring to FIG. 5, the connection bracket 300a may further include a clip portion 350 of metal. The clip portion 350 is connected to the end portion of the connection portion 320 and can be pressed and configured to grip the coil 140. [ 5, the clip portion 350 may protrude from the upper end of the connection portion 320 in a direction opposite to the base portion 310, and the free end thereof may be bent upward to form a predetermined inner space have. The clip portion 350 may be placed on the upper surface of the protrusion 220 when the connection portion 320 is fixed to the circuit board 210 so as to be in close contact with the protrusion 220. [ Also, according to one example, the clip portion 350 may be made of the same material as the connection portion 320 and the base portion 310 to form an integral member.

The coil 140 may be inserted into the inner space of the clip unit 350 as described above. The free end of the clip portion 350 is pressed toward the other portion of the clip portion 350 so that at least a part of the clip portion 350 is pressed against the coil 140, So that the coils 140 can be securely held. As a result, the coils 140 and the connection brackets 300a can be electrically connected by physical coupling. In this case, it is not necessary to separately solder the coil 140 to the connection bracket 300a, and workability can be further improved.

Although the motor according to the embodiment of the present invention has been described above as a specific embodiment, it is merely an example, and the present invention is not limited thereto and should be interpreted as having the widest range according to the basic idea disclosed in this specification. Skilled artisans may implement a pattern of features that are not described in a combinatorial and / or permutational manner with the disclosed embodiments, but this is not to depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

1: motor 10: motor housing
110: rotor 120: stator
130: shaft 140: coil
210: circuit board 211: opening
220: protrusion 221: guide groove
300, 300a: connection bracket 310: base portion
320: connection part 330: connection groove
350: clip portion 31: circuit element

Claims

A stator through which the coil is wound;
A circuit board provided on an upper portion or a lower portion of the stator with one surface thereof facing the stator and having an opening; And
And a metal connection bracket fixed to the other surface of the circuit board and having one side electrically connected to the circuit pattern of the circuit board and the coil,
The connection bracket
A base portion on one side of the circuit board to be connected to the circuit pattern; And
And a connection portion connected to the base portion at a predetermined angle with the base portion and to which the coil passed through the opening portion is connected.

The method according to claim 1,
And the connecting portion is connected to one end of the base portion to be perpendicular to the base portion.

The method according to claim 1,
And a connecting recess is formed at an end of the connecting portion so as to be recessed toward the base portion and to receive the coil.

The method of claim 3,
And the coil is soldered to the connection groove.

The method according to claim 1,
The connection bracket
And a clip portion connected to the end portion of the connection portion and capable of being compressed and holding the coil.

6. The method according to any one of claims 1 to 5,
Further comprising a protrusion provided along at least a part of an edge of the opening and formed to protrude from the other surface of the circuit board,
And the connection bracket is disposed such that one side of the connection portion is in contact with one side of the projection.

The method according to claim 6,
A guide groove recessed toward the circuit board is formed at an end of the protrusion,
And the coil is accommodated in the guide groove when the coil is connected to the connection bracket.