KR100541100B1 - Vibration motor with easy assembly - Google Patents

Abstract

The present invention relates to a vibration motor for generating vibration, and to apply a double-sided printed circuit board (PCB) to a power supply unit for supplying power from the outside to the vibration motor to improve the assembly and to have a more compact (compact) shape It relates to an improved vibration motor.

The present invention provides a vibration motor for generating vibration by rotating an eccentric rotor by electromagnetic induction, comprising: a stator portion having a body and a magnet fixed to the body; A rotor part having a rotation shaft supported at both ends by the body and rotatably fixed at one end thereof, and an armature fixed to the rotation shaft to be spaced apart from the magnet; And a power supply unit having a fixed cap fixed to the body, and a double-sided board member fixed to one surface of the brush mounted on the fixed cap and supplying current to the armature. It provides a vibration motor.

Thus, according to the present invention, it is possible to obtain the effect of improving the assembly of the brush using a double-sided PCB, which is a double-sided board member and to provide a vibration motor having a more compact shape (compact).

Brush, commutator, rotor, eccentric weight, vibration motor

Description

Vibration motor with a power supply easy to assemble {Vibration motor with easy assembly}             

1 shows a conventional vibration motor,

(a) is an exploded perspective view

(b) is sectional drawing.

Figure 2 shows a conventional vibration motor of another form,

(a) is an exploded perspective view

(b) is sectional drawing.

Figure 3 is an overall exploded perspective view of a vibration motor having a power supply easy to assemble according to the present invention.

4 shows a power supply unit according to the present invention,

(a) is a perspective view of the fixing cap

(b) is a perspective view of a double-sided board member

(c) is a perspective view of a brush.

5 is a combined perspective view of the power supply unit according to the present invention.

6 shows a power supply unit according to the present invention,

(a) is an embodiment in which a current is supplied to the brush by a lead wire,

(b) shows another embodiment in which current is supplied to the brush by the terminal.

Explanation of symbols on main parts of drawing

10 ..... Stator part 12 ..... Body

12a ..... support tube 14 ..... magnet

30 ..... rotor 32 ..... axis of rotation

34 ..... commutator 36 ..... armature

37 ..... eccentric weight 50 ..... power supply

52 ..... Fixing cap 54 ..... Brush

56 ..... Duplex Board Member 59 ..... Terminal

The present invention relates to a vibration motor for generating a vibration, and more particularly, by applying a double-sided printed circuit board (PCB) to a power supply unit for supplying power from the outside to the vibration motor to improve assembly and compact The present invention relates to a vibration motor improved to have a shape.

Representative portable mobile terminals currently used include mobile phones and data communication functions, such as schedule management, fax transmission and Internet access, by adding the advantages of personal digital assistants (PDAs) to the mobile phones. Such as a smart phone (smart phone).

These are all equipped with a variety of incoming signal device, when receiving a message such as voice or text is configured to notify the user of the incoming message in a variety of ways.

That is, the incoming signal device mounted on the portable mobile communication terminal may include a sound generating device for generating sound or a vibration generating device for generating vibration, and the vibration generating device may be various types of vibration sources. Vibration motors are used.

The vibration motor applied to the vibration generating device used in the portable mobile communication terminal may be divided into a flat type having a thin thickness and a bar type having a long shape according to its shape.

1A and 1B show a conventional bar type vibration motor, which will be described below.

As shown in Figure 1a, the bar-type vibration motor is largely composed of a stator 110, a rotor 130, and a power supply 150, the stator 110 is a body 112 And a magnet (114).

At this time, as shown in Figure 1b, the body 112 is a hollow cylindrical shape and has a double tube structure in which a support tube 112a is integrally formed therein, the outside of the support tube (112a) a magnet ( 114) is fixed.

In addition, the rotor unit 130 includes a plurality of commutators 134, which are divided and fixed on one surface of the rotating shaft 132 in which the eccentric weight 131 is fixed at one end, and the fixed body 138 fixed at the other end of the rotating shaft 132. And a cylindrical armature 136 fixed to the fixture 138 and fixedly disposed around the rotation shaft 132. The armature 136 is generally made of a coil wound and is electrically connected to the commutator 134, respectively.

At this time, the rotating shaft 132 is supported to be rotatable by a bearing 104 installed in the support tube 112a of the body 112.

In addition, as shown in FIG. 1A, the power supply unit 150 has a fixed cap 152 fixed to one side of the body 112 and a pair of brushes 154 directly installed on the fixed cap 152. In this case, the brush 154 is connected to the lead wire 156 for supplying power and is configured to contact the outer peripheral surface of the commutator 134.

On the other hand, when a voice or text message is received by the portable mobile communication terminal, power is supplied to the vibration motor 100 through the lead wire 156. That is, as described above, power supplied through the lead wire 156 is applied to the brush 154 and is supplied to the armature 136 through the commutator 134 in contact with the brush 154.

As described above, when the armature 136 is supplied with power, the armature 136 rotates due to the interaction between the magnet 114 fixed in the body 112 and the armature 136, that is, the electromagnetic induction phenomenon. Done.

Therefore, when the armature 136 is rotated, the eccentric weight 131 fixed to one end of the rotary shaft 132 is rotated to generate a vibration is transmitted to the portable mobile communication terminal.

However, the power supply unit 150 configured as described above has the following problems.

As the portable mobile communication terminal is gradually miniaturized and the vibration motor is also miniaturized, its assemblability is sharply degraded. That is, the installation of the pair of brushes 154 directly to the fixing cap 152, and connecting the lead wires to the brushes 154, as the size of the work is reduced in size has caused a significant reduction in the assembly efficiency.

In order to solve the above conventional problem, the power supply unit 150 ′ shown in FIGS. 2A and 2B is used.

As shown in FIG. 2A, the commutator 134 ′ consisting of a plurality of flat segments is fixed to the lower surface of the fixture 138 ′ fixed to the other end of the rotation shaft 132 ′. At this time, the fixing body 138 'is flat so that it does not protrude to one surface.

The fixing cap 152 'is equipped with a substrate 156' on which a pair of brushes 154 'are fixed, and the substrate 156' is fixed on the substrate 156 '. Terminal portion 156a 'to which the lead wire 158' for supplying power is connected.

The power supply unit 150 ′ having the structure as described above mounts the brush 154 ′ and the lead wire 158 ′ on the substrate 156 ′ in an automatic process, and then attaches the substrate 156 ′ to the fixing cap 152. ') To improve its assemblability to improve productivity.

However, as the portable mobile communication terminal is gradually miniaturized, the vibration motor mounting space in the portable mobile communication terminal is also gradually narrowed, so that the terminal portion 156a 'of the substrate 156' is the body or the fixed cap of the vibration motor. The outwardly protruding shape of 152 'has placed many constraints on mounting the vibration motor in a portable mobile communication terminal.

The present invention is to solve the conventional problems as described above, by applying a double-sided PCB to the power supply for supplying power from the outside to the vibration motor to improve its assemblability, the vibration having a more compact (compact) shape The purpose is to provide a motor.

According to an aspect of the present invention, there is provided a vibration motor for generating vibration by rotating an eccentric rotor by electromagnetic induction, comprising: a stator portion having a body and a magnet fixed to the body; A rotor part having a rotation shaft supported at both ends by the body and rotatably fixed at one end thereof, and an armature fixed to the rotation shaft to be spaced apart from the magnet; And a power supply unit having a fixed cap fixed to the body, and a double-sided board member mounted on the fixed cap and fixed to one surface with a brush for supplying current to the armature. It provides a vibration motor having a power supply easy to assemble, characterized in that the double-sided printed circuit board (PCB) formed with a conductive pattern.

Preferably, the body is a hollow cylindrical shape, the inside is a double tube structure formed integrally with a support tube fixed to the magnet on the outer surface, the armature is made of a coil wound.

Preferably, a fixed body is installed at the other end of the rotating shaft, and a commutator composed of a plurality of segments and electrically connected to the armature, respectively, is installed on one surface of the fixed body so that the armature is formed by discontinuous contact between the commutator and the brush. Power is discontinuously supplied.

Preferably, the fixing cap has a substrate seating groove is formed so that the double-sided board member is seated and coupled to the substrate seating groove, the fixing cap is a brush fixed to the double-sided board member so that the brush is always in contact with the commutator Protruding portion is formed at the bottom of the.

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Preferably, a lead wire is connected to a conductive pattern formed on the other surface of the double-sided substrate member and electrically connected to the brush, and the fixing cap has lead wire openings therethrough.

Preferably, it may include a conductive terminal fixed to the fixing cap to be electrically connected to the conductive pattern formed on the other surface of the double-sided board member.

Preferably, the brush is bent to form a sharp angle between the fixed end and the contact end.

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

Figure 3 is an overall exploded perspective view of a vibration motor having a power supply easy to assemble according to the present invention, Figure 4 is a power supply according to the present invention, (a) is a perspective view of the fixing cap, (b ) Is a perspective view of the double-sided board member, (c) is a perspective view of the brush, Figure 5 is a perspective view of the power supply unit according to the present invention, Figure 6 shows a power supply unit according to the present invention, (a) is a lead wire (B) shows another embodiment in which a current is supplied to the brush by a terminal.

3 shows a vibration motor 1 having an easily assembled power supply unit according to the present invention, which will be described below.

Vibration motor (1) having a power supply easy to assemble according to the present invention includes a stator 10, a rotor 30 and a power supply 50, the stator 10 is inside The magnet 14 includes a fixed body 12.

As shown in FIG. 3, the body 12 has a hollow cylindrical shape, and has a double tube structure in which a support tube 12a having the magnet 14 fixed thereto is formed on an outer surface thereof. That is, one end of the body 12 is closed except for the inner diameter of the support tube 12a by the support portion 12b to which the support tube 12a is connected, and the other end is open.

Next, the rotor part 30 is demonstrated.

As shown in FIG. 3, the rotor unit 30 includes a rotating shaft 32, a commutator 34, an armature 36, and the like, and an eccentric weight 37 having an eccentricity at one end of the rotating shaft 32. ) Is fixed.

And, the other end of the rotating shaft 32 is fixed to the fixed body 38, a flat commutator 34 is fixed to one surface of the fixed body 38, the cylindrical armature 36 of the fixed body 38 ) Is fixed. At this time, the armature 36 may be made of a coil wound, the commutator 34 is composed of a plurality of segments (segment) and is electrically connected to the armature 36, respectively.

On the other hand, the bearing 16 is inserted into and fixed to the support tube 12a of the stator portion 10, and the rotating shaft 32 is inserted into the inner ring of the bearing 16, so that both ends of the rotating shaft 32 are It is rotatably supported and fixed to the body 12.

At this time, the armature 36 maintains a predetermined interval with the magnet 14 fixed to the outside of the support shaft 12a of the body 12.

The magnet 14 is described as being fixed to the outside of the support tube 12a in the present embodiment, but is fixed to the inner surface of the body 12 to be configured to maintain a constant interval with the armature 36 It may be.

Next, the power supply unit 50 will be described.

As shown in FIG. 3, the power supply unit 50 includes a fixing cap 52, a brush 54, and a double-sided board member 56, and the fixing cap 52 is formed of the body 12. It is coupled to the other open end.

As shown in more detail in FIG. 4A, the fixing cap 52 coupled to the body 12 has a substrate seating groove 52a in which a double-sided board member 56 to be described below is mounted and fixed. have.

At this time, the substrate seating groove 52a facilitates the assembly of the double-sided board member 56, which will be described later, and may further include an insertion portion 52c having various shapes to fix the double-sided board member 56.

In addition, a protrusion 52b is formed in the fixing cap 52 to prevent sagging of the brush 54 to be described later. A lead wire opening 52d is formed in the inner side of the substrate seating groove 52a. .

As shown in FIG. 4B, the double-sided board member 56 has a shape that matches the shape of the substrate seating groove 52a formed in the fixing cap 52, and is coupled to the insertion part 52c or the like. A coupling groove 56b may be additionally provided.

In addition, the double-sided board member 56 has conductive patterns 56a formed on both surfaces thereof, and the conductive patterns 56a formed on one surface of the double-sided board member 56 have a brush 54 formed of a conductive material by a conductive fixing method such as soldering. The lead wire 58 for supplying power may be fixed to the conductive pattern (not shown) formed on the other surface thereof by the same method as the brush 54.

At this time, the patterns 56a formed on both surfaces of the double-sided board member 56 are electrically connected to each other, and the lead wire 58 is connected to the fixing cap 52 through the lead wire opening 52d formed in the fixing cap 52. ) Is connected to the rear.

In the present exemplary embodiment, a double-sided printed circuit board (PCB) may be preferably applied to the double-sided board member 56, and any of the double-sided printed circuit boards may be formed on both sides.

Meanwhile, as shown in FIG. 4C, the brush 54 fixed to the pattern 56a of the double-sided board member 56 has a fixed end 54a fixed to the pattern 56a formed on the double-sided board member 56. ) And a free end 54b contacting the commutator 36, the fixed end 54a and the free end 54b may be bent at an acute angle to each other.

At this time, in order to prevent the free end 54b of the brush 54 from sagging and coming into contact with the commutator, the bent portion of the fixed end 54a and the free end 54b is bent roundly to fix the fixed end 54a. It is in elastic contact with the commutator.

As shown in FIG. 3, when the fixing cap 52 of the power supply unit 50 is coupled to the other open side of the body 12, the brush 54 is fixed to one surface of the fixing body 38. Contacted commutator 36.

Subsequently, when a voice or text message arrives at the portable mobile communication terminal, current is supplied to the vibration motor 1 through the lead wire 58. That is, as described above, the electric current supplied through the lead wire 58 is applied to the brush 54 through the double-sided board member 56 and the armature 36 through the commutator 34 in contact with the brush 54. Is supplied.

On the other hand, in the above-described embodiment, the brush 54 is described that the current is supplied by the lead wire 58 is electrically connected to the other surface of the double-sided substrate member 56, the fixed cap 52 is different from the above The current can also be supplied by a conductive terminal 59 fixed to the conductive terminal 59 electrically connected to the conductive pattern formed on the other surface of the double-sided board member 56.

That is, as shown in Figure 6a, the current can be supplied to the brush 54 through the lead wire 58, and as shown in Figure 6b is fixed to the fixing cap 52 is the double-sided substrate member ( A current may be supplied to the brush 54 through the conductive terminal 59 electrically connected to the pattern formed on the other surface of the 56.

Therefore, when the current is supplied to the brush 54 by the terminal 59 as necessary, the terminal 59 is configured such that the terminal 59 elastically contacts a contact (not shown) connected to a power source. Can be.

In the above, although the lead wire and the terminal are applied, various means for supplying current may be applied.

As described above, when the current is supplied to the armature 36, the rotating shaft 32 is rotated by the interaction of the magnet 14 and the armature 36 fixed in the body 12, that is, the electromagnetic induction phenomenon . When the rotating shaft 32 rotates, power is discontinuously supplied to the armature 34 by discontinuous contact between the commutator 36 and the brush 54, and the rotating shaft 32 rotates continuously.

Since the vibration motor 1 according to the present invention configured as described above uses the double-sided board member 56, the brush 54 and the lead wire 58 are automatically assembled on both sides of the double-sided board member 56. After coupling through the double-sided board member 56 can be coupled to the fixing cap 52 to facilitate its assembly.

That is, as the vibration motor is gradually miniaturized, the surface mounting technology may be applied to the automatic assembly process. The surface mounting technology refers to a technology for connecting an electronic component to a PCB by soldering to a surface connection pattern instead of a component hole, and according to this technology, it is possible to cope with miniaturization of a component and to perform high density mounting. Is possible.

Meanwhile, as shown in FIG. 5, when the double-sided board member 56 is coupled to the fixing cap 52, the protrusion 52b formed on the fixing cap 52 is positioned below the brush 54. Thus, even when the brush 54 is deformed, the brush 54 is supported such that the free end 54b of the brush 54 contacts the commutator 34.

In addition, since the power supply unit 50 according to the present invention uses the double-sided board member 56, the lead wire 58 is connected to the rear surface thereof, and the lead wire 58 is rearward through the lead wire opening 52d of the fixing cap 52. ) Can be connected to the terminal 12 or the like protruding to the outside of the fixing cap 52 is unnecessary.

Accordingly, it is possible to provide a vibration motor having a compact shape so as to solve the difficulty of mounting caused by the terminal portion protruding to the outside in an increasingly miniaturized portable mobile communication terminal.

While the invention has been shown and described in connection with specific embodiments, it is to be understood that various changes and modifications can be made in the art without departing from the spirit or the scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

 According to the present invention as described above, it is possible to obtain the effect of improving the assembly of the brush 54 using the double-sided PCB which is a double-sided board member and to provide a vibration motor having a more compact shape (compact).

In addition, a protrusion 52b is formed on the fixing cap 52 so that the brush 54 is stably contacted with the commutator 34 so that the brush 54 is not separated from the commutator 34 even when the brush 54 is deformed. It is possible to obtain the effect of improving the stability of the operation.

Claims (11)

In a vibration motor for generating vibration by rotating the eccentric rotor portion by the electromagnetic induction phenomenon, A stator portion having a body and a magnet fixed to the body; A rotor part having a rotation shaft supported at both ends by the body and rotatably fixed at one end thereof, and an armature fixed to the rotation shaft to be spaced apart from the magnet; And And a power supply unit having a fixed cap fixed to the body, and a double-sided board member mounted on the fixed cap and fixed to one surface with a brush for supplying current to the armature, wherein the double-sided substrate member has conductive patterns on both sides thereof. Vibration motor having a power supply easy to assemble characterized in that the formed double-sided PCB (Double-sided printed circuit board). The vibration motor of claim 1, wherein the body has a hollow cylindrical shape and a double tube structure in which a support tube fixed with the magnet is integrally formed on an outer surface thereof. The vibration motor of claim 1, wherein the armature comprises a coil wound. According to claim 1, wherein the other end of the rotating shaft is provided with a fixed body, one surface of the fixed body is composed of a plurality of segments and the commutator is electrically connected to the armature and each is installed in the discontinuous contact between the commutator and the brush Vibration motor having an easy assembly power supply, characterized in that by discontinuously supplying power to the armature. The vibration motor of claim 1, wherein a substrate seating groove is formed in the fixing cap such that the double-sided board member is seated and coupled to the board seating groove. According to claim 1, The fixing cap is easy to assemble the power supply characterized in that the protrusion is located in the lower portion of the brush fixed to the double-sided board member so that the brush is always in contact with the commutator Vibration motor provided. delete The vibration motor of claim 1, wherein a lead wire is connected to a conductive pattern formed on the other surface of the double-sided substrate member and electrically connected to the brush. The vibration motor of claim 1, wherein the fixing cap has a through lead wire opening formed therethrough. The vibration motor of claim 1, further comprising a conductive terminal fixed to the fixing cap so as to be electrically connected to a conductive pattern formed on the other surface of the double-sided board member. The vibration motor of claim 1, wherein the brush is bent to form an acute angle between the fixed end and the free end.

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