KR20080108389A - Vibrator - Google Patents

Abstract

A parallel type vibrator is provided to generate vibration with while oscillating element is vibrated up and down and to transmit vibration by the elasticity of the oscillating element to a case through a plate spring so that problem that rotation inferiority is generated due to high speed rotation of an existing rotor is solved. A vibrator(1100) comprises: a case; a coil installed on the case; a magnet(1130) arranged within the case; an oscillating element including a back yoke(1120) combined in the upper side and side of magnet; and an elastic member fixed to the case and elastically supporting the oscillating element. The case comprises the upper case and lower case(1160). The coil is fixed to the lower case. The upper side of the elastic member is fixed to the upper case. The lower-part of the elastic member is fixed to the oscillating element.

Description

Vibrator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat oscillator for use in causing vibration in portable telephones or pagers.

One of the most remarkable things in the development of modern communication technology is a portable mobile communication device such as the mobile phone, which is not only portable but also enables mutual voice communication anytime, anywhere, so that the user has recently exploded. Increasingly, it is becoming a communications device that replaces landline phones.

Unlike a landline phone, the portable mobile communication device as described above requires a separate incoming call signal so that only a user can know in addition to a sound signal such as a bell sound because a call can be made in a public place such as a library.

For the same reason as above, in addition to an incoming signal using a sound signal, a method of detecting an incoming signal by using a vibration or a ramp is used. Among these methods, an incoming signal is detected by vibration. Which is implemented by a vibrating motor.

Conventional vibration motors used in equipment such as portable mobile communication devices should be equipped with a small vibration motor due to the characteristics of the device.

1 is a front sectional view of a flat vibration motor mainly used in a conventional portable mobile communication device.

The flat vibration motor 100 is provided with a bracket (Bracket, 105) at the bottom, the lower end of the shaft (190) is firmly fitted in the center of the bracket 105, the upper end of the rotary shaft 190 The upper case 160 is coupled to the cap shape which is opened downward to block the components provided at the top of the bracket 105 from external interference while having the internal components at the top of the bracket 105.

The upper surface of the bracket 105 is attached to a central portion and a flexible plate 110 having a fine thickness extending from the central portion to one side of the bracket 105.

In addition, a multi-pole magnet 140 having N and S poles alternately magnetized is attached to the outer circumference of the flexible substrate 110, and the flexible substrate 110 is disposed in a central space portion through which the magnet 140 penetrates. One brush (120) having a lower end attached thereto is provided at a predetermined angle.

A bearing 195 is coupled to the rotary shaft 190 at an upper portion thereof, and the rotor 170 is eccentrically supported at an outer circumference of the bearing 195.

At this time, the rotor 170 has a predetermined electric angle to the upper surface on the plate (185, plate 185) of the semi-circular shape so that a current is applied to the plurality of winding coils 150 (a pair is shown in this figure) It is composed of a weight (180, 180) to be bonded, and the vibration is generated between the winding coil 150.

In addition, the bottom surface of the semi-circular plate 185 is composed of a plurality of segments (segments) to the inner end supported by the bearing 195, the brush 120 formed on the circuit board fixed to the bracket 105 is in contact The commutator 130 is formed.

Figure 2 is a perspective view showing a multi-pole magnet attached to the rotor and the outer circumference of the bracket supported by the rotating shaft of the conventional flat vibration motor.

The rotor 200 cuts a circular plate at a predetermined angle to make a plate 210 having a semicircular shape, and joins two winding coils 220 at a predetermined electric angle to an upper surface of the plate 210. The current is applied, and the weight 230 is disposed on the outer periphery of the outer side from the rotation center point supported by the rotation shaft 250 of the plate 210 and covered with the upper case 240.

The weight 230 uses a metal or an alloy such as tungsten having a very high specific gravity.

In addition, the magnet 260 of the multi-pole attached to the outer periphery of the upper plate of the bracket 105 is magnetized so that the N pole and the S pole are repeated in a disc shape as shown in the drawing, and a constant voltage is induced in the coil 150. When the magnetic flux is generated by the electromagnetic force between the magnet 260 and the semi-circular rotor is rotated.

The operation of the flat vibration motor according to the present invention having the above configuration will be described with reference to FIGS. 1 and 2.

Power input from the outside is energized to the winding coil 150 through the flexible substrate 110, the brush 120, the commutator 130 and the plate 185, between the winding coil 150 and the magnet 140 The electromagnetic force is generated by the interaction, and the rotor 170 rotates by the generation of the magnetic flux by the electromagnetic force.

At this time, since the rotor 170 is eccentrically supported by the rotating shaft 190, the eccentric driving is performed, and the eccentric driving force is transmitted to the bracket 105 through the rotating shaft 190, thereby vibrating the portable mobile communication device. Will be

That is, when the rotor 170 supported by the rotating shaft 190 is rotated, the vibration is generated by the eccentric phenomenon due to the weight of the weight 180 attached to the upper surface of the rotor 170 will be.

As described above, in the case of the conventional flat vibration motor, when the rotary shaft is press-fitted into the bearing pressed into the rotor, a bearing slippage occurs during the press-fitting process and deformation of the rotary shaft (poor straightness) may occur due to the press-fitting pressure. There is a problem that can cause a poor rotation accordingly.

In addition, in the conventional flat vibration motor, vibration is generated by the centrifugal force due to the rotation of the rotor supporting the rotating shaft, so that the vibration is transmitted to the vibration motor through the rotating shaft, so that the vibration motor can be excessively applied when rotating at high speed. .

In addition, since portable mobile communication devices are becoming smaller and thinner, the accessories to be mounted on such portable mobile communication devices also need to be thinner and thinner.

However, since the conventional flat vibration motor generates vibration by rotating the rotor using the eccentric driving force by centrifugation, in order to increase the centrifugal force, the weight of the weight rotated at high speed or mounted on the rotor is measured. And the radius of the rotation axis must be increased.

Therefore, the conventional flat vibration motor is not suitable for use in the interior of a portable communication device that becomes thinner and thinner in accordance with the recent trend because the power consumption is increased or the weight of the motor is increased and its size is increased. Has a problem.

According to the present invention, the vibrating member having a permanent magnet having N poles and S poles attached to the back yoke is vertically lifted by a spring by interacting with a single-phase coil mounted to a lower case, thereby vibrating the vibrating member while shaking up and down. The vibration generated by the elasticity of the vibrating member is transmitted to the case through the leaf spring so that the vibration generated by the eccentric driving force using the centrifugal force of the rotor supported by the rotating shaft in the conventional flat vibration motor through the rotating shaft It is an object of the present invention to provide a new type of flat oscillator that solves the problem of poor rotation caused by the high speed rotation of the rotor when transmitted to the vibration motor.

In order to achieve the above object, the flat oscillator according to the present invention includes: a lower case and an upper case which block external interference and form an interior space; A wound coil mounted on an upper surface of the lower case and a spring holder provided around the upper surface; And a vibrating member including a permanent magnet interacting with the coil, a back yoke attached to one surface of the permanent magnet, and a leaf spring mounted on the top or bottom of the back yoke and fixed to the spring holder. Characterized in that.

 The vibration member may further include a weight having a predetermined weight mounted on the lower side of the permanent magnet.

The leaf spring has a fixing leg including a plurality of fixing portion and characterized in that the fixing leg is twisted in the shape of a pinwheel.

The present invention also relates to a flat oscillator, comprising: a lower case and an upper case which block external interference and form an interior space; A wound coil mounted on an upper surface of the lower case and a lead wire for applying power from the outside to the coil; And a vibration member including a permanent magnet interacting with the coil, a back yoke to which one surface of the permanent magnet is attached, and a leaf spring mounted on an upper end of the back yoke and directly fixed to the lower case and the upper case. It is characterized by the configuration.

The lower case and the upper case is characterized in that it has a plurality of fixed terminals to be directly coupled to the vibration member in the same position.

The vibrating member may further include a weight having a predetermined weight mounted on a side of the permanent magnet.

The leaf spring has a fixing leg including a plurality of fixing portions, characterized in that the fixing legs are twisted in the shape of a pinwheel.

The lower case, the upper case and the leaf spring is characterized in that the screw is fixed.

The flat oscillator according to the present invention uses a plate spring to solve problems such as a poor rotation due to deformation of the rotating shaft generated during the pressing process when the conventional flat vibration motor presses the rotating shaft into a bearing press-fitted to the rotor. It is solved by assembling the vibrating member and has the effect of improving productivity by shortening the conventional complicated process.

In addition, the flat type vibrator according to the present invention can be applied to the vibrating motor by centrifugal force due to the high speed rotation of the rotor that the conventional flat type vibration motor is supported on the rotating shaft, the permanent magnet of the vibration member and the stator Due to the interaction between the coils, vibration is generated by the upper and lower resonant motions of the vibrating member, and thus is transmitted to the case, so that there is no effect applied to the vibrator.

In addition, since the present invention has fewer parts and can be completed by simply assembling as compared with the related art, there is also an effect of reducing cost.

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

Example 1

Figure 3 is an embodiment of the present invention in a front view in a flat oscillator according to the present invention.

Incoming line of an upper case 310, a lower case (not shown) coupled to the upper case, and a lead wire 320 for supplying current to a coil mounted inside the lower case. Two (in) and out (out) are formed so that they can come out of the case.

4 is a cross-sectional view of the flat vibrator as shown in FIG.

In the center of the dish-shaped lower case 410, when the power is applied from the external lead wire 480 is mounted a coil 420 to the N pole and S pole, the spring holder around the upper surface of the lower case 410 430 is mounted and the vibration member is inserted molded in the spring holder 430.

The vibrating member is inserted into the spring holder 430 by insert molding to cover the upper case 490 of the cap shape which is fixed to the spring holder and is opened downward to complete the flat vibrator 400.

The vibration member may include a permanent magnet 450, a weight having a predetermined weight mounted on the side of the permanent magnet 450, and a back yoke to which one surface of the permanent magnet 450 is attached. And a leaf spring 470 attached to the upper and lower ends of the back yoke 440 and having three fixing portions fixed to the spring hole.

An assembly process of an embodiment of the present invention having the configuration as described above will be described in detail with reference to FIGS. 5 to 9.

5 shows a process of assembling the spring unit in the present invention.

The two leaf springs 500 having three fixing portions 520 and the fixing legs 530 including the fixing portions 520 are twisted in a pinwheel shape to have elasticity and the upper end of the back yoke 510. Mount on the bottom.

The central portion of the leaf spring 500 is drilled so that the permanent magnet can be inserted into the concave portion of the lower end of the back yoke 500 after the leaf spring 500 is mounted on the bottom and the back yoke 510. do.

The finished cross section of the spring piece is a cross section at an angle of approximately 120 ° as shown in the leaf spring.

6 is a process of assembling the vibration member by coupling the permanent magnet to the spring unit.

The permanent magnets are formed in recesses formed so that the permanent magnets 620 can be inserted into the center of the lower end of the back yoke 610 in the spring unit assembled by attaching the leaf spring 600 to the upper and lower ends of the back yoke 610. Combine 620.

On the other hand, before the permanent magnet 620 is combined with the spring unit, a weight 630 having a predetermined weight is mounted on the side of the permanent magnet 620, and the weight 630 is excellent by making the vibration member more elastic. Vibration force can be obtained.

When the weight 630 is mounted to the side of the permanent magnet 620, the lower side of the permanent magnet 620, considering that the permanent magnet 620 is fitted into the concave portion of the lower center of the back yoke 610 Mount on.

The permanent magnet 620 has an N pole and an S pole, and the vibration member vibrates up and down by interaction with a coil mounted on a lower case.

7 shows a process of forming the vibration member unit by mounting and molding the vibration member to a spring holder.

The completed vibration member is mounted on the spring holder 740. The spring holder 740 is molded in a cylindrical shape and half-molded and injected and formed.

The vibration member is placed thereon so that the fixing part of the leaf spring 700 is supported by the spring holder 740.

The vibrating member is inserted into the spring holder 740 on which the vibrating member is placed again onto the half-shaped cylindrical spring holder 740 to completely fix the fixing part of the leaf spring 700 to the spring holder 740. The vibration of the spring holder 740 to be able to be transmitted to the outside well.

As another method of forming the vibrating member unit, there may be a method of molding the spring of the vibrating member directly into the spring holder and a method of fusion fixing the spring of the vibrating member to the spring holder.

The method of molding the spring of the vibrating member directly into the spring holder inserts the spring and the spring holder together in plastic after the spring has been worked.

In addition, the method of fixing the spring of the vibrating member to the spring holder is fixed by rotating the springs of the two stages to cross each other at an angle of 60 degrees to insert the spring into the projection of the spring holder injected by plastic and melt the projection to fix the spring That's how.

The methods for forming the above-mentioned vibration member single piece are all functionally the same.

Reference numeral 710 denotes a back yoke, reference numeral 720 denotes a permanent magnet, and reference numeral 730 denotes a weight.

8 is a process of assembling the stator unit in the flat oscillator according to the present invention.

The assembly of the stator unit is completed by mounting the wound coil 800 on the inner central portion of the dish-shaped lower case 810 and connecting the lead wire 820 for applying an external power source to the coil in place.

When power is applied from the outside through the lead wire 820, an alternating current flows in the coil 800, and the coil 800 forms an N pole and an S pole.

9 is a process of inserting the vibrating member unit into the stator unit to be coupled to each other, and covering and assembling the upper case of the cap shape to be opened downward.

A back yoke 910 in which a coil spring 940 is mounted on an inner central portion of the lower case 950, and a leaf spring 900 is mounted on a stator unit consisting of a lead wire 970 for applying external power to the coil. Insert the vibration member unit into which the vibration member combined with the permanent magnet 920 attached with the weight 930 is inserted into the spring holder 960. The vibration member is inserted into the spring holder 960. Complete the type oscillator.

Through the above process, the assembly of the flat oscillator is an embodiment of the present invention is completed.

The operation of the flat oscillator according to the embodiment of the present invention is as follows.

When power is applied from the outside through the lead wire 970, an alternating current flows in the coil 940, and the coil 940 forms an N pole and an S pole.

A permanent magnet 920 is directly attached to the back yoke 910 to face the coil 940 and interacts with the coil 940 and the permanent magnet 920 having an N pole and an S pole. As a result, the vibration member vibrates up and down.

The vibration of the upper and lower vibrations of the permanent magnet 920 is transmitted to the leaf spring 900 of the vibrating member, and the vibration transmitted by the elasticity of the leaf spring 900 is transferred to the spring holder 960 and the case 955, 950. The mold vibrator vibrates.

Example 2

 Another embodiment of the flat oscillator according to the present invention is as follows.

10 is another embodiment of the present invention in a front view in a flat vibrator according to the present invention.

The flat oscillator 1000 includes an upper line 1010 and an in line and an out line of the lead wire 1030 for supplying current to the coil mounted on the lower case (not shown since it is a front view). Two wires can be pulled out from one side of the case, and the upper case 1010 and the lower case are provided with fixed terminals 1020 at three same positions extending and extending outwardly.

FIG. 11 is a cross-sectional view of the flat vibrator as shown in FIG. 10.

In the center of the pot-shaped lower case 1160, when a power is applied from an external lead wire 1180, a coil 1150 having an N pole and an S pole is wound and mounted, and a vibration member is mounted on the lower case 1160. The upper case 1180 having a shape of being placed on and flipping the lower case 1160 in the shape of a pot is coupled to form a flat vibrator 1100.

The vibrating member includes a weight 1140 having a predetermined weight mounted on the permanent magnet 1130, a side surface of the permanent magnet 1130, and a back yoke 1120 and the back to which one surface of the permanent magnet 1140 is attached. The leaf spring 1110 is mounted on the top of the yoke 1120.

When the weight 1140 is mounted on the side of the permanent magnet 1130, the permanent magnet 1130 is fitted into a recess in the center of the lower end of the back yoke 1120 to be coupled to the lower side of the permanent magnet 1130. Mount on.

The leaf spring 1110 has three fixing portions, and the fixing legs including the fixing portions are twisted in a pinwheel shape to have elasticity.

Looking at the assembly process of the flat oscillator having the configuration as described above in detail.

12 is a process of assembling the spring unit in the present invention.

The spring spring 1200, which is composed of fixing legs 1230 having three fixing parts 1220 at the upper end of the back yoke 1210, is mounted to complete the spring unit.

The leaf spring 1200 has three fixed legs 1230 are twisted in the shape of a pinwheel to the outside of the circular ring having a central portion drilled in such a manner that the back yoke 1210 is inserted into the top.

13 is a process of assembling the vibration member in the present invention.

One surface of the permanent magnet 1320 is attached to a concave shape in a form in which the permanent magnet 1320 may be inserted into and coupled to a lower portion of the back yoke 1310 in the completed spring unit.

A side of the permanent magnet 1320 is provided with a weight 1330 having a predetermined weight and the vibration member is well received by the weight 1330.

The weight 1330 is attached to the side of the permanent magnet 1320 and is positioned on the lower side of the permanent magnet 1320 to be fitted to the back yoke 1310.

14 is a process of assembling the vibration member unit by placing the vibration member on the stator unit.

The vibrating member attaches the leaf spring 1400 to the upper end and attaches the permanent magnet 1420 coupled to the weight 1430 to the lower part.

In the stator unit, a coil 1450 wound around the lower case 1440 of the pot maintenance is attached to the center of the inside.

The vibration member unit is assembled by placing the vibration member on the pot-shaped lower case 1440 to which the wound coil 1450 is attached.

At this time, the fixing part 1470 of the leaf spring 1400 is mounted on the fixing terminal 1460 of the lower case 1440 in the vibration member.

FIG. 15 is an assembly process of covering the upper case having a shape in which a pot-shaped lower case is inverted on the single vibrating member to complete a flat vibrator.

In the vibrating member, the fixing parts 1590 formed at three positions of the leaf spring 1500 are combined with the fixing terminal 1580 of the lower case 1540 and the upper case 1550 to be fixed by using screws to flatten the flat parts. Complete the vibrator.

The operation of the flat oscillator according to the embodiment of the present invention is as follows.

When power is applied from the outside through the lead wire 1560, alternating current flows in the coil 1570, and the coil 1570 forms an N pole and an S pole.

Permanent magnet 1520 is attached directly to the back yoke 1510 directly above the coil 1570, and the coil 1570 interacts with the permanent magnet 1520 having an N pole and an S pole. The vibrating member vibrates up and down.

The upper and lower vibrations of the permanent magnet 1520 are transmitted to the leaf spring 1500 of the vibrating member so that the vibration transmitted by the elasticity of the leaf spring 1500 is immediately transmitted to the case.

1 is a cross-sectional view schematically showing the internal components of a conventional flat vibration motor in cross section.

Figure 2 is a perspective view showing a magnet mounted on the upper surface of the bracket and the rotor accommodated in the outer case of the conventional flat vibration motor.

3 is a front view of one embodiment of the present invention.

4 is a cross-sectional view of one embodiment of the present invention.

5 is an assembly view showing a process of assembling the spring unit in the present invention.

6 is an assembly view showing a process of assembling the vibration member in the present invention.

Figure 7 is an assembly view showing a process of assembling the vibration member unit in the present invention.

8 is an assembly view showing a process of assembling the stator unit in the present invention.

9 is an assembly view showing the final assembly of the flat oscillator in the present invention.

10 is a front view of one embodiment of the present invention.

11 is a cross-sectional view of one embodiment of the present invention.

12 is an assembly view showing a process of assembling the spring unit in the present invention.

Figure 13 is an assembly view showing a process of assembling the vibration member in the present invention.

14 is an assembly view showing a process of assembling the stator unit and the vibration member to assemble the vibration member unit in the present invention.

15 is an assembly view showing the final assembly of the flat oscillator in the present invention.

<Description of Signs of Major Parts of Drawings>

900, 1500: leaf spring 910, 1510: back yoke

920, 1520: permanent magnets 930, 1530: weight

940, 1570: wound coil 950, 1540: lower case

960: spring holder 970, 1560: lead wire

955, 1550: upper case 1580: fixed terminal

1590: fixed part

Claims (30)

case; A coil installed on the case; A vibration member including a magnet disposed in the case and a back yoke coupled to the top and side surfaces of the magnet; And And an elastic member fixed to the case to elastically support the vibration member. The method of claim 1, The case includes a vibrator including an upper case and a lower case. The method of claim 2, The coil is a vibrator fixed to the lower case. The method of claim 2, The elastic member is a vibrator in contact with the upper case. The method of claim 2, The upper surface of the elastic member is fixed to the upper case, the lower surface of the elastic member is fixed to the vibration member. The method of claim 1, The elastic member is a leaf spring. The method of claim 1, An oscillator comprising a weight coupled with the back yoke. The method of claim 7, wherein And the weight is at least partially disposed on the same horizontal plane as the magnet. The method of claim 1, And the coil and the vibrating member overlap in a vertical direction. The method of claim 1, The coil, magnet and back yoke are oscillators overlapping in the vertical direction. The method of claim 1, The coil, the magnet and the back yoke is disposed in the vertical direction, the magnet is disposed between the coil and the back yoke. case; A coil supported by the case; A vibration member disposed in the case; And And an elastic member fixed to the case to elastically support the vibration member. The method of claim 12, The case comprises an upper case and a lower case coupled to the upper case. The method of claim 12, The vibrating member includes a magnet and a back yoke coupled with the magnet. The method of claim 14, The vibrator includes a weight coupled to the back yoke. The method of claim 12, The elastic member is a leaf spring. The method of claim 13, The elastic member is one side is fixed in contact with the upper case, the other side is fixed to the vibrating member. The method of claim 14, The elastic member is coupled to the back yoke, the back yoke is in contact with the upper surface and the side of the magnet vibrator. The method of claim 14, The magnet and the back yoke are at least a portion disposed on the same vertical surface, and at least a portion of the vibrator is disposed on the same horizontal surface. The method of claim 15, And the weight and the magnet are at least partially disposed on the same horizontal plane. case; A coil supported by the case and connected to an external power supply device; A vibrating member including a magnet disposed in the case; And An elastic member fixed to the case to elastically support the vibration member, The vibrating member and the coil are disposed in a vertical direction, and the vibrating member vibrates in a vertical direction as power is applied to the coil. The method of claim 21, The vibrating member includes a back yoke coupled with the magnet, and the back yoke is coupled with the elastic member. The method of claim 22, The vibrator comprises a weight coupled with the back yoke. The method of claim 21, The magnet and the back yoke is disposed in the vertical direction, the back yoke is in contact with the upper surface of the magnet. A case including a lower case and an upper case coupled to the lower case; A coil supported by the lower case and provided with power through a power line passing through the lower case; A vibration member including a magnet disposed in the case, a back yoke coupled to the magnet, and a weight coupled to the back yoke; And And an elastic member supported by the case to elastically support the vibration member. The method of claim 25, The elastic member is a vibrator fixed to the upper surface of the back yoke. The method of claim 25, The magnet is a vibrator fixed in contact with the lower surface of the back yoke. The method of claim 25, The coil is disposed below the back yoke, the weight is disposed on the side of the magnet. The method of claim 25, The elastic member has one surface in contact with the upper case, the other surface in contact with the vibration member. The method of claim 25, The magnet is a vibrator disposed in the center portion of the lower surface of the back yoke.

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