KR20160028134A - Cantilever type vibrator - Google Patents

Abstract

The present invention relates to a vibrator and, more specifically, to a cantilever type vibrator which simplifies a structure by using a cantilever spring and is formed in a quadrangular shape to be easily installed inside a small electronic device. The cantilever type vibrator includes: a case formed in a shape of a quadrangular box and of which one surface is opened; a plate-shaped cover shutting down an opening part of the case; a cantilever spring including a lower horizontal part which comprises a bent metal band with a constant thickness and width and is horizontally extended to a specific length to be fixed to the cover, a vertical connection part which is extended upward to a specific length on one end of the lower horizontal part and has a bent portion, in the middle thereof, to apply an elastic restoring force, and an upper horizontal part extended in parallel with the lower horizontal unit to a specific length on an upper end of the vertical connection unit; a magnet installed on a front end of the upper horizontal part; and a coil installed on an upper surface of the cover to correspond to the magnet.

Description

[0001] CASTLEVER TYPE VIBRATOR [0002]

The present invention relates to a vibration generator, and more particularly, to a con- tyler-type vibration generator having a simple structure using a caterpillar spring and having a rectangular shape and being easily installed in an internal space of a small-sized electronic device.

Recently, vibration generators (vibrators) for converting electrical signals into vibrations have been used in various devices. For example, a cellular phone is provided with a function of notifying a user of an incoming call by using vibration instead of voice. In addition, a controller of a portable game machine or a game machine is provided with a function of giving a vibration according to a game situation in order to increase the actual feeling. In addition, it is installed in a touch panel, and is used for giving a touch feeling when a user touches the panel.

FIG. 13 shows a side view of a general conventional bar type vibration motor, which will be described below.

The bar-type vibration motor 200 mainly includes a stator 210 and a rotor 220. The stator 210 includes a body 211, a fixed cap 212 fixed to one side of the body, and a magnet 213. The body is a hollow cylindrical shape, and a magnet 213 is fixed .

The rotor 220 includes an eccentric weight 223, a plurality of commutators 224 divided and fixed to one surface of the fixture 225 and a plurality of coil assemblies 222 fixed to the fixture. The brush 240 is connected to a lead wire 215 for supplying electric power and is connected to the commutator 224. The brush 240 is connected to the fixed cap 212, And the current is applied.

These vibration motors generate rotational force to rotate the rotating part of the unbalanced mass to obtain the mechanical vibration. Most of the rotational force is rectified through the contact point of the brush and the commutator, and the current is supplied to the rotor coil .

However, in the brush type structure using the commutator, when the motor rotates, the brush causes mechanical friction and electrical sparking through the gap between the segment and the segment of the commutator, and the brush and the commutator The life of the motor is shortened.

A portable vibrating body has been proposed in Japanese Patent Laid-Open No. 2003-117489 as a vertical vibrator that is a vibrationless motor of a brushless type in which the disadvantage of such a brush type vibration motor is partially improved. This is shown in FIG. 14, which will be described as follows.

A pair of brackets for supporting both ends of the fixed shaft are provided at the axial outer ends of the cylindrical frame 410, and a cylindrical coil 420 having terminals is fixed to the inner peripheral surface of the frame. The cylindrical permanent magnet 430 is magnetized in the radial direction, and the elastic member 440 is fixed to the same plane as the permanent magnet 430.

However, since the coil is located on the outer circumference of the case of the portable vibrating body 400 and occupies a lot of space, and the volume occupied by the elastic member outside the motion locus is the coil elastic member, There is a problem that it can not be secured. That is, the mass of the vibrating body can not be maximized, and the amount of vibration under the same volume can not be maximized.

In addition, the conventional linear vibration motor is an obstacle to miniaturization of the communication device. That is, the conventional linear vibration motor has a circular outer shape. Therefore, there is a space that can not be utilized between the outer surface of the conventional linear vibration motor and the outer surface of the other components to be installed in the communication device, and therefore, the communication device using the conventional linear vibration motor is miniaturized There is a limit.

In order to solve such a problem, a linear vibration generator in which the outer shape of the linear vibration motor is formed in a square shape has been developed.

Fig. 15 shows a conventional linear vibration generator. As shown in the figure, a rectangular case 110 having a predetermined space formed therein is provided. The case 110 has a rectangular upper case 111 having a bottom opened and a rectangular lower case 115 coupled to the upper case 111 and having a top, a front and a rear open.

An FPCB (Flexible Printed Circuit Board) 120 is fixed to the lower surface of the lower case 115 with an adhesive or the like.

The first coil 131 and the second coil 133 are closely fixed to both sides 115a and 115b of the lower case 115. The first coil 131 and the second coil 133 are fixed to the FPCB 120, Respectively. The first coil 131 and the second coil 133 are formed by winding the first coil 131 and the second coil 133. The first coil 131 and the second coil 133 are formed by winding the first coil 131 and the second coil 133. In order to increase the electromagnetic force generated by the magnet 150, It is preferable to wind on the outer surface of the core 138.

A spring 140 having a first arm 141, a second arm 144 and a receiving portion 147 is coupled to the upper surface of the upper case 111. The first arm 141 is fixed on the upper end side of the upper case 111 and the lower end side is located on the lower side of the upper surface of the upper case 111. The upper end of the second arm 144 is fixed to the center of the upper surface of the upper case 111 and the lower end of the second arm 144 is positioned below the upper surface of the upper case 111. Thus, the first and second arms 141 and 144 are arranged in the longitudinal direction of the upper case 111 to form a cantilever shape.

The magnet 150 is formed in a rectangular shape corresponding to the receiving portion 147 and is inserted and fixed in the receiving portion 147 and positioned between the first coil 131 and the second coil 133. One side and the other side of the magnet 150 are opposed to the first coil 131 and the second coil 133, respectively.

When the current is applied to the first and second coils 131 and 133, the magnetic field generated by the first and second coils 131 and 133 and the magnetic field generated by the magnet 150 cause the magnet 150 to move up and down Vibrations occur while vibrating.

Such a conventional linear vibration motor can be formed in a rectangular shape and installed in a small electronic device, but the length of the first arm 141 and the second arm 144 is short and the vibration power is weak.

Korean Patent Registration No. 10-0828648

SUMMARY OF THE INVENTION It is a primary object of the present invention to provide a cantilever type vibration generator which can be easily installed in a small electronic device or miniaturized in an electronic device with a rectangular shape.

It is another object of the present invention to provide a cantilever type vibration generator capable of improving the reliability of a product by using a cantilever spring to improve the amplitude and simplify the structure of the product.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cantilever type vibration generator capable of improving the mounting performance and simplifying the internal structure to reduce the original feeling.

As a means for achieving the object of the present invention, a cantilever type vibration generator according to the present invention comprises:

A case having a rectangular box shape and open at its one side;

A plate-shaped cover for closing an opening of the case;

A lower horizontal part which is formed by bending a metal band having a certain thickness and width and is fixed to the cover by a predetermined length in a horizontal direction and a lower horizontal part which is extended from the upper end of the lower horizontal part by a predetermined length, A cantilever spring having a vertical connection portion formed with a bent portion and an upper horizontal portion extending from the upper end of the vertical connection portion in parallel with the lower horizontal portion;

A magnet installed at the tip of the upper horizontal portion;

And a coil provided on an upper surface of the cover to correspond to the magnet.

In the present invention, a coil is provided at the tip of the upper horizontal portion, and a magnet is provided on the upper surface of the cover to correspond to the coil.

A core is installed in the middle of the coil.

The upper end of the upper horizontal portion is provided with a seat having a step formed in a downward direction.

A case having a rectangular box shape and open at its one side;

A lower horizontal portion which is formed by bending a metal band having a certain thickness and width and which extends in a horizontal direction by a predetermined length and covers an opening portion of the case, and a lower horizontal portion extending from the upper end of the lower horizontal portion by a predetermined length, A cantilever spring having a vertical connection portion formed with a bent portion for extending the vertical connection portion and an upper horizontal portion extending from the upper end of the vertical connection portion by a predetermined length in parallel with the lower horizontal portion;

A magnet installed at the tip of the upper horizontal portion;

And a coil provided on an upper surface of the cover to correspond to the magnet.

A case having a rectangular box shape and open at its one side;

A plate-shaped cover for closing an opening of the case;

An upper horizontal portion which is formed by bending a metal band having a predetermined thickness and width and is fixed to a lower surface of the case by a predetermined length in a horizontal direction and an upper horizontal portion extending from a lower end of the upper horizontal portion by a predetermined length, And a lower horizontal portion extending from the lower end of the vertical connection portion in parallel with the upper horizontal portion to a predetermined length;

A magnet disposed at a tip of the lower horizontal portion;

And a coil installed in the case to correspond to the magnet.

A coil is provided at a tip end of the lower horizontal portion, and a magnet is provided at a lower surface of the cover to correspond to the coil.

And a flexible substrate (FPCB) for supplying external electric signals to the coils provided in the lower horizontal portion is provided at the tip of the lower horizontal portion.

As described above, the cantilever type vibration generator according to the present invention has a quadrangular outer shape and is easily mounted inside a small electronic device.

Further, since the cantilever-type speaker vibrates up and down, the width of vibration can be widened and the magnet vibrates up and down, so that there is no fear that the coil is cut.

Further, the present invention improves the reliability of the product by simplifying the internal structure.

1 is a perspective view of a cantilever type vibration generator according to the present invention,
Fig. 2 is a cross-sectional view of the cantilever-type vibration generator shown in Fig. 1,
3 is an internal perspective view of the cantilever type vibration generator shown in Fig. 1,
Fig. 4 is an exploded perspective view of the cantilever type vibration generator shown in Fig. 1,
5 is an exploded perspective view showing another embodiment of the cantilever type vibration generator according to the present invention,
6 is an exploded perspective view showing still another embodiment of the cantilever type vibration generator according to the present invention,
7 and 8 are a cross-sectional view and an exploded perspective view showing another embodiment of the cantilever type vibration generator according to the present invention,
9 and 10 are a cross-sectional view and an exploded perspective view showing still another embodiment of the cantilever type vibration generator according to the present invention,
11 and 12 are a cross-sectional view and an exploded perspective view showing another embodiment of the cantilever type vibration generator according to the present invention,
13, 14 and 15 are sectional views showing an example of a vibration generator according to the related art.

Hereinafter, a preferred embodiment of a cantilever type vibration generator according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an example of a cantilever type vibration generator according to the present invention, FIG. 2 is a sectional view of the cantilever type vibration generator shown in FIG. 1, and FIG. 3 is an exploded perspective view of the cantilever type vibration generator shown in FIG. to be.

1, a cantilever type vibration generator 1 according to the present invention includes a case 2 and a cover 3, and a cantilever installed in an inner space of the case 2, A spring 11, a magnet 21 and a coil 31. [

The case (2) is in the form of a rectangular box, and one side thereof is open. The cover (3) is in the form of a plate and closes the opening of the case (2).

The cantilever spring 11 is formed by bending a metal band having a predetermined thickness and width into a predetermined shape and is composed of an upper horizontal portion 12, a vertical connecting portion 13 and a lower horizontal portion 14.

The lower horizontal portion 14 is extended in the horizontal direction by a predetermined length and is fixed to the upper surface of the cover 3 to support the caterpillar spring 11. [

The vertical connection part 13 extends from one end of the lower horizontal part 14 to a predetermined length and has a bent part 13a at the center thereof so that the caterpillar spring 11 has appropriate elastic restoring force.

The upper horizontal portion 12 extends horizontally from the upper end of the vertical connection portion 13 and is formed to be parallel to the lower horizontal portion 14.

Preferably, the upper horizontal portion 12 extends beyond the lower horizontal portion 14 and a magnet 21 is installed at the tip of the upper horizontal portion 12. The top portion of the upper horizontal portion 12 is provided with a seating portion 12a for mounting the magnet 21. The seating portion 12a is bent downward at the tip of the upper horizontal portion 12 so as to form a step, . At this time, the height of the seating part 12a is made similar to the height of the magnet 21. Bending the seating portion 12a in the downward direction to form a step is to prevent the magnet 21 from coming into contact with the case 2. [

The coil 31 is installed on the upper surface of the cover 3 so as to be positioned below the magnet 21. At this time, a core 32a may be installed in the center of the coil 31. [ That is, the coil 31 may be formed by winding a coil on the outer circumferential surface of the core 32a. At this time, a printed circuit board (not shown) may be further provided on the upper surface of the cover 3. The coil 31 may be connected to the connection terminal of the printed circuit board.

When an electric signal is applied to the coil 31, an electric field generated by the coil 31 and a magnetic field generated by the magnet 21 interact with each other to form an upper horizontal Thereby vibrating the portion 12 up and down. Then, the vibration of the caterpillar spring 11 is transmitted to the outside through the cover 3 and the case 2.

More specifically, the caterpillar spring 11 is fixed to the upper surface of the cover 3. For this purpose, as shown in FIG. 4, the lower horizontal portion 14 is provided with one or more engagement pieces. For example, at the tip of the lower horizontal portion 14, a tip coupling piece 14a bent downward is provided. The front end coupling piece 14a is inserted into the through hole 3a formed in the cover 3 and then bent to fix the caterpillar spring 11. [ In addition, although not shown, one or more side coupling pieces may be provided on the side surface of the lower horizontal portion 14. The side coupling piece is inserted into a side through hole formed in the cover 3 and then bent to fix the caterpillar spring 11.

A core 32 may be installed in the center of the coil 31. As shown in FIG. 5, the core 32 may include a core plate 32b and a core rod 32a. The core rod 32a is formed perpendicular to the center of the upper surface of the core plate 32b. The coil 31 is wound on the outer circumferential surface of the core rod 32a.

6 shows another embodiment of the cantilever type vibration generator according to the present invention. The cantilever type vibration generator 1 of the present embodiment has a structure in which a coil 31 is installed on the upper horizontal portion 12 of the caterpillar spring 11 and a magnet 21 is installed on the cover 3 . A core 32 is provided at the center of the coil 31.

Although the rectangular magnet 21 and the circular coil 31 are shown in the figure, the magnet 21 and the coil 31 are not limited to this type and may have various shapes.

Next, Figs. 7 and 8 show still another embodiment of the cantilever type vibration generator according to the present invention. As shown in the figure, the cantilever type vibration generator 1 of the present embodiment is such that the lower horizontal portion 14 of the caterpillar spring 11 serves as the cover 3. That is, the size and width of the lower horizontal portion 14 of the caterpillar spring 11 are extended so that the opening portion of the case 2 can be closed. On the upper surface of the lower horizontal portion 14, a printed circuit board 16 for supplying an external electric signal to the coil 31 is provided. The lower horizontal portion 14 is fixed to the case 2 through a coupling means (not shown).

9 and 10 show still another embodiment of the cantilever type vibration generator according to the present invention. As shown, the upper horizontal portion 12 of the caterpillar spring 11 is attached to the lower surface of the case 2. At this time, the upper horizontal part 12 extends shorter than the lower horizontal part 14 and is fixed to the case 2 by an adhesive material or welding.

A coil 31 is provided on the lower horizontal portion 14 of the caterpillar spring 11 and a magnet 21 is provided on the lower surface of the case 2. [ The magnet 21 may be provided at the front end of the lower horizontal portion 14 and the coil 31 may be provided at the lower surface of the case 2. [

A flexible substrate 18 for supplying an electric signal to the coil 31 provided on the lower horizontal portion 14 may be further provided at the tip of the lower horizontal portion 14. The flexible substrate 18 is bent so that the center thereof is inclined at a predetermined angle. The lower end of the flexible substrate 18 is fixed to the upper surface of the cover 3, and the upper end thereof is fixed to the tip of the lower horizontal portion 14.

11 and 12 show another embodiment of a cantilever type vibration generator according to the present invention.

As shown in the drawing, the cantilever type vibration generator 1 of the present embodiment includes a caterpillar spring 11 installed in an inner space of a case (not shown), and a magnet 21 (not shown) provided on the top surface of the caterpillar spring 11 And a coil 31 mounted on the upper surface of the cover 3. [

The cantilever spring 11 is formed by bending a metal band having a predetermined thickness and width into a predetermined shape and is composed of an upper horizontal portion 12, a vertical connecting portion 13 and a lower horizontal portion 14.

The lower horizontal portion 14 is extended in the horizontal direction by a predetermined length and is fixed to the upper surface of the cover 3 to support the caterpillar spring 11. [ At this time, an opening 3b is formed in the cover 3 to have a predetermined size, so that the lower horizontal portion 14 can be fixed by welding or the like.

The upper horizontal part 12 extends horizontally from the upper end of the vertical connecting part 13 and is formed to be parallel to the lower horizontal part 14. At this time, the upper horizontal part 12 may have a rectangular through-hole 12b having a predetermined size, so that the upper horizontal part 12 may have a constant elastic restoring force.

The coil 31 is provided on the upper surface of the cover 3 so as to be positioned below the magnet 21 provided at the tip of the caterpillar spring 11. [ At this time, a core 32a may be installed in the center of the coil 31. [

The magnet 21 and the coil 31 may be circular, square, oval or the like. Therefore, the present invention is not limited thereto.

As described above, since the cantilever type vibration generator according to the present invention is formed by providing the cantilever spring in the case of the rectangular box type, it is possible to downsize the cantilever type vibration generator, and the inner structure is simple and the reliability of the product is improved. Since the vibration width is large, a large vibration force can be obtained.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

1: cantilever type vibration generator 2: case
3: cover 3a: through hole
11: cantilever spring 12: upper horizontal part
12a: seat part 13: vertical connection part
13a: bent portion 14: lower horizontal portion
14a: coupling piece 16: printed circuit board
18: flexible substrate 21: magnet
32: coil 32: core

Claims (12)

A case having a rectangular box shape and open at its one side;
A plate-shaped cover for closing an opening of the case;
A lower horizontal part which is formed by bending a metal band having a certain thickness and width and is fixed to the cover by a predetermined length in a horizontal direction and a lower horizontal part which is extended from the upper end of the lower horizontal part by a predetermined length, A cantilever spring having a vertical connection portion formed with a bent portion and an upper horizontal portion extending from the upper end of the vertical connection portion in parallel with the lower horizontal portion;
A magnet installed at the tip of the upper horizontal portion;
And a coil provided on an upper surface of the cover to correspond to the magnet.
The method according to claim 1,
Wherein a coil is provided at the tip of the upper horizontal portion, and a magnet is provided on the upper surface of the cover to correspond to the coil.
3. The method of claim 2,
And a core is installed in the center of the coil.
The method of claim 3,
Wherein a top portion of the upper horizontal portion is provided with a seat portion having a step formed in a downward direction.
A case having a rectangular box shape and open at its one side;
A lower horizontal portion which is formed by bending a metal band having a certain thickness and width and which extends in a horizontal direction by a predetermined length and covers an opening portion of the case, and a lower horizontal portion extending from the upper end of the lower horizontal portion by a predetermined length, A cantilever spring having a vertical connection portion formed with a bent portion for extending the vertical connection portion and an upper horizontal portion extending from the upper end of the vertical connection portion by a predetermined length in parallel with the lower horizontal portion;
A magnet installed at the tip of the upper horizontal portion;
And a coil provided on an upper surface of the cover to correspond to the magnet.
A case having a rectangular box shape and open at its one side;
A plate-shaped cover for closing an opening of the case;
An upper horizontal portion which is formed by bending a metal band having a predetermined thickness and width and is fixed to a lower surface of the case by a predetermined length in a horizontal direction and an upper horizontal portion extending from a lower end of the upper horizontal portion by a predetermined length, And a lower horizontal portion extending from the lower end of the vertical connection portion in parallel with the upper horizontal portion to a predetermined length;
A magnet disposed at a tip of the lower horizontal portion;
And a coil installed in the case to correspond to the magnet.
The method according to claim 6,
Wherein a coil is provided at a tip end of the lower horizontal portion, and a magnet is provided on a lower surface of the cover to correspond to the coil.
8. The method of claim 7,
And a soft substrate for supplying an external electrical signal to the coil provided at the lower horizontal portion is further provided at the tip of the lower horizontal portion.
A case having a rectangular box shape and open at its one side;
A plate-shaped cover for closing an opening of the case;
A lower horizontal portion which is formed by bending a metal band having a certain thickness and width and which is extended in a horizontal direction by a predetermined length and is fixed to the cover, a vertical connection portion extending from the one end of the lower horizontal portion by a predetermined length, A cantilever spring having an upper horizontal portion extending from the upper end of the upper horizontal portion to a predetermined length parallel to the lower horizontal portion, wherein a rectangular through-hole is formed in the upper horizontal portion;
A magnet installed at the tip of the upper horizontal portion;
And a coil provided on an upper surface of the cover to correspond to the magnet.
10. The method of claim 9,
Wherein a coil is provided at the tip of the upper horizontal portion, and a magnet is provided on the upper surface of the cover to correspond to the coil.
11. The method of claim 10,
And a core is installed in the center of the coil.
12. The method of claim 11,
And an opening for fixing the lower horizontal portion is formed on the cover.

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