KR100765221B1 - A vibrator - Google Patents

Abstract

The present invention relates to a vibration generating device, and an object of the present invention is to provide a vibration generating device in which vibration is increased while noise is reduced while minimizing an area including a volume. The present invention for achieving this object, and a case for hermetically receiving the component; A driving body generating a magnetic field by an AC signal applied from the outside; A vibrating body which pendulum moves by an electromagnetic field generated by the driving body; In the vibration generating apparatus including a support for supporting in the case so that the vibrating body pendulum in the region of the electromagnetic field generated by the drive body, the drive body is made of a bobbin wound around the coil, in the inward direction of one side of the support The vibrating body is characterized in that the magnetic body reacting to the alternating polarity of the driving body is inserted into the space into which the driving body can be drawn and inside the space. The present invention configured as described above has a structure in which the vibrating body penetrates from the outside of the driving body, so that the interval between installation of the driving body and the vibrating body is narrowed, so that miniaturization is possible, and the corresponding area between the vibrating body and the driving body becomes large and the vibration force Not only is this improved, but the vibrating body does not collide with the support and the driving body during the pendulum movement, thereby obtaining the effect of preventing the generation of noise.

Description

Vibration Generator {A vibrator}

1 is a perspective view of the cover open showing the configuration of the present invention.

2 is an exploded perspective view showing the main configuration of the present invention.

3 is a plan sectional view showing a configuration of the present invention.

4 is a cross-sectional view showing the configuration of the present invention.

5, a and b are flat cross-sectional views showing the configuration and operation of the present invention.

6 is an exemplary view showing another embodiment of the present invention.

     <Description of Signs of Major Parts of Drawings>

10: vibration generating device 11: case

11a: cover 12: drive body

12a: coil 12b: bobbin

12c: fitting protrusion 13: vibrating body

14 support 16 magnetic material

The present invention relates to a vibration generating device, and more particularly to a small vibration generating device embedded in an electronic device that requires the generation of vibration sound, such as a mobile phone.

In general, portable communication terminals such as mobile phones (cellular phones and PCS phones), PDAs, and notebook computers are equipped with an electronic acoustic transducer to enable sound output. The electro-acoustic transducer includes a speaker receiver buzzer capable of outputting voice and sound, and is largely classified into a vibration generator that generates vibration force and outputs vibration sound. The vibration generating device is a motor driving method for generating vibration by the centrifugal force of the rotary pin eccentrically fixed to the rotation axis of the motor, and a rotational or linear reciprocating motion in response to the coil generating the electromagnetic force by the applied electric signal (power) A magnetic circuit driving method in which a vibrator generates vibration may be representative. Examples of the magnetic circuit driving method include a coin type and a cylinder type. Looking at the characteristic portion of the conventional configuration of the coin-type vibration generating device, first, the vibrator is configured to be eccentrically rotated about the axis. This is because the vibration force proceeds from side to side, there is a problem that the vibration force is low. In addition, since the vibrator is configured to rotate, a brush or other connecting means is provided in the case so as to apply current to the coil provided in the vibrator, so that the connection with the terminal provided in the vibrator is made. However, in such a structure, the brush or the connecting means is worn while rubbing against the terminal of the vibrator, and there is a problem in operation, such as not performing an accurate operation when used for a long time. On the other hand, in the case of the cylindrical type of the magnetic circuit driving system, the vibrator has a structure that collides with the case while linearly reciprocating, which is closer to the impact sound than the vibration sound, and may be damaged by direct collision with the case. There were many problems.

In order to improve the problems of the conventional vibration generating device, the present applicant has filed an application for a vibration generating device (Korean Patent Application No. 2005-0083546 (September 8, 2005 filed)). However, the vibration generating device, which the applicant has previously applied for, has a large occupied area (for the part to be installed), and is large in volume, contrary to the trend of the parts industry that is aimed at light and small size, and also in the field of electronic acoustic devices. Contrary to the commercially available prototype, there was a problem of poor compatibility.

In order to solve the problems of the applicant's previously filed vibration generating device, the applicant has filed an improved vibration generating device (Domestic Utility Model Registration Application No. 2005-0027685 (September 27, 2005)). However, the above-described vibration generating apparatuses of the present application had limitations in miniaturization due to the large volume and the area of the driving body made of the coil wound coil, and the heavy weight, and the gap between the driving body and the vibrating body, that is, the pendulum of the vibrating body. Since the vibration width required for the movement must be secured, this was also a problem in miniaturization. In addition, the gap between the driving body and the vibrating body, there is a problem that the vibration force is low because the generated magnetic force is not utilized to the maximum.

The present invention for solving the above problems is to provide a vibration generating device that minimizes the area including the volume while increasing the vibration, noise is reduced.

The present invention for achieving this object, and a case for hermetically receiving the component; A driving body generating a magnetic field by an AC signal applied from the outside; A vibrating body which pendulum moves by an electromagnetic field generated by the driving body; In the vibration generating apparatus including a support for supporting in the case so that the vibrating body pendulum in the region of the electromagnetic field generated by the drive body, the drive body is made of a bobbin wound around the coil, in the inward direction of one side of the support The vibrating body is characterized in that the magnetic body reacting to the alternating polarity of the driving body is inserted into the space into which the driving body can be drawn and inside the space.

When the electromagnetic field is formed in the driving body by an AC signal applied from the outside, the present invention is supported by a support fixed to the case, and according to the electromagnetic field alternated between the magnetic material inserted in the inner space of the vibrating body located in the space. The pendulum will be moved, the pendulum movement is transmitted to the case through the support to generate a vibration sound. At this time, the vibrating body is magnetized by the magnetic body to have the same magnetic properties as the magnetic body. Therefore, the area corresponding to each other between the vibrating body and the driving body drawn into the space of the vibrating body increases and close to each other as much as possible, thereby making the most of the influence of the generated magnetic force, thereby improving the vibration force.

In the present invention as described above, the case is, for example, an enclosure opened by a cover. Here, the cover is formed, for example, through holes for dissipating heat generated by the drive body.

In the present invention, the driving body is, for example, a magnetic circuit. Here, the magnetic circuit, for example, the coil for generating an electromagnetic force in accordance with the applied AC signal; Cylindrical bobbins in which coils are wound; And a magnetic body inserted into the space of the vibrating body.

In the present invention, the vibrating body may be, for example, a metal block reacting to a magnetic field, or may be a magnetic body itself. In addition, the space of the vibrating body may be a groove, or may be an open type formed by cutting the vibrating body.

In the present invention, the support is, for example, a "c" shaped leaf spring. In this case, the support may be, for example, swivel welded to the case, or adhesively fixed, to form a bend extension formed by bending the cut end of the support to the outside to impregnate the case integrally when the case is injected. Can also be. Here, the support and the vibrating body may be attached and fixed through an adhesive, may be screwed, or may be coupled by welding. In addition, the support may have a width that is thinner than the thickness of the vibrating body, or may be the same (shown in the attached drawing with the same thickness).

Prior to describing an embodiment of the present invention, which may be configured as described above, as an accompanying drawing for reference, FIG. 1 is a perspective view showing a cover showing the configuration of the present invention, and FIG. 3 is an exploded perspective view showing the main structure of the present invention, FIG. 3 is a flat sectional view showing the configuration of the present invention, FIG. 4 is a front sectional view showing the configuration of the present invention, and FIGs. 6 is a schematic cross-sectional view showing an operating state, and FIG. 6 is shown as an exemplary view showing another embodiment of the present invention.

The present invention will be described below with reference to the accompanying drawings presented as above. First, the present invention, as shown in the accompanying drawings, Figures 1 to 4, and the case 11 for hermetically receiving the component; A drive body 12 for generating a magnetic field by an AC signal applied from the outside; A vibrating body 13 pendulum-moved by an electromagnetic field generated by the driving body 12; The vibration generating device (10) comprising a support (14) for supporting the vibrating body (13) in the case (11) to pendulum move in the region of the electromagnetic field generated by the driving body (12). 12 is made of a bobbin 12b wound around the coil 12a, and is fixed to an inner side of one side of the support body 14, and the vibrator 13 is a space in which the driving body 12 can be retracted. And a magnetic body 16 that is responsive to the alternating polarity of the drive body 12 inside the space.

In the present invention as described above, the case 11 is a housing opened by the cover 11a. Here, the cover 11a is provided with a through hole 11b as a heat sink for dissipating heat generated by the driving body 12.

 On the other hand, the drive body 12 is a magnetic circuit, the coil (12a) for generating an electromagnetic force in accordance with the applied AC signal; It comprises a bobbin 12b in which the coil 12a is wound.

Meanwhile, in the present invention, the vibrator 13 is a metal block responding to a magnetic field.

Meanwhile, in the present invention, the support 14 is a "c" shaped leaf spring, and both ends of the support 14 are welded and fixed to the inner circumferential surface of the case 11.

At this time, the support body 14 is welded to the case 11.

According to the present invention as described above, unless an alternating current signal is applied to the coil 12a, a magnetic field is not formed in the driving body 12 and thus does not operate.

However, when the AC signal is applied to the coil 12a, an electromagnetic field is formed in the coil 12a and the bobbin 12b portion of the driving body 12, as shown in FIGS. The direction of the magnetic force changes according to the alternating alternating current signal, that is, the driving force 12 and the magnetic body 16 and the vibrating body 13 are mutually attracting force and repulsive force alternately acting, pushing the vibrating body 13 or The support 14 having an elastic force supporting the vibrating body 13 also vibrates from side to side along the vibrating body 13, that is, pendulum movement or contraction and expansion of the vibrating body 13 to the outside and the inside thereof. Pendulum exercise.

At this time, the heat generated from the drive body 12 is discharged to the outside through the through-hole that is the heat sink (11b) formed in the cover (11a), to prevent the deterioration of electrical characteristics, and to extend the life.

In addition, as another embodiment of the present invention, as shown in FIG. 6, the driving body 12 may be detached from the support 14 and fixed to the case 11. In this way, the left and right amplitudes of the support body 14 supporting the vibrating body 13 become large.

According to the present invention as described above, the structure of the vibrating body penetrates from the outside of the driving body, and the installation interval between the driving body and the vibrating body is narrowed, so that miniaturization is possible, and the corresponding area between the vibrating body and the driving body becomes large and the vibration force is increased. Not only is this improved, but the vibrating body does not collide with the support and the driving body during the pendulum movement, thereby obtaining the effect of preventing the generation of noise.

Claims (11)

A case 11 for hermetically receiving the component; A driver 12 generating a magnetic field by an AC signal applied from the outside; A vibrating body 13 pendulum-moved by an electromagnetic field generated by the driving body 12; The vibration generating device (10) comprising a support (14) for supporting the vibrating body (13) in the case (11) to pendulum move in the region of the electromagnetic field generated by the driving body (12). 12 is made of a bobbin 12b wound around the coil 12a, and is fixed to an inner side of one side of the support body 14, and the vibrator 13 is a space in which the driving body 12 can be retracted. (S) and the vibration generating device characterized in that the magnetic body (16) responding to the alternating polarity of the drive body (12) inside the space (S) is fixed to the insert. The vibration generating device according to claim 1, wherein the case (11) is made of a circular enclosure, and the opening is closed by a cover (11a). The driving body (12) of claim 1, further comprising: a coil (12a) for generating an electromagnetic force in accordance with an alternating current signal; Vibration generating device characterized in that it comprises a bobbin (12b) in which the coil (12a) is wound. The vibration generating device according to claim 2, wherein the cover (11a) is formed with a through hole (11b) for dissipating heat generated by the driving body. The vibration generating device according to claim 1, wherein the vibrating body (13) is made of a metal block in response to a magnetic field. The vibration generating device according to claim 1, wherein the vibrating body (13) is made of a magnetic block in response to a magnetic field. The vibration generating device according to claim 1, wherein the space (S) of the vibrating body (13) is a groove. The vibration generating device according to claim 1, wherein the space (S) of the vibrating body (13) is cut open. The vibration generating device according to claim 1, wherein the support (14) is a "c" shaped leaf spring, and both ends of the support (14) are fixed to the inner circumferential surface of the case (11). The vibration generating device according to claim 9, wherein the welding of the support body (14) and the case (11) is a swept welding. The vibration generating device according to claim 1, wherein the driving body (12) is detached from the support (14) and fixed to the case (11).

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