JP3220023U - Micro linear vibrator capable of vibrating in two frequencies and in two directions - Google Patents

Abstract

A micro linear vibrator capable of providing various tactile feedbacks is provided. A support unit, a flexible circuit board, a coil, a displacement limiting piece, a shield, a magnet, a weight, a high frequency spring plate, a frame, a positioning plate, and a low frequency weld plate. A micro linear vibrator capable of vibrating in two frequencies and in two directions is provided. Since this vibrator has two frequencies and two vibration directions, it can provide an additional haptic feedback experience when driven mixed with low and high frequency currents. By adjusting the mixing ratio of the high frequency and the low frequency, various tactile feedbacks can be obtained, and more experiences can be provided to the user. [Selection] Figure 2

Description

  The present invention relates to the field of vibrators, and more particularly to a micro linear vibrator having two natural frequencies and two vibration directions composed of a vibrator and a support part.

  A conventional micro vibrator used for tactile feedback is realized mainly by vibration generated by rotation of an eccentric wheel driven by a DC motor. However, since the direct current motor changes the current direction through the brush, its life is limited to the brush and it is difficult to exceed 200 hours.

  In addition, the micro brushless motor vibrator has now solved the problem of life, but its application time is limited because the start-up time is long, the response speed is slow, and the phenomenon of feedback delay exists.

  Currently, linear vibrators manufactured by the principle of linear motors usually adopt a single frequency, but the tactile feedback mode with a single frequency cannot satisfy the demand for various tactile feedbacks. .

  The object of the present invention is to provide a micro linear vibrator capable of vibrating in two kinds of frequencies and in two directions in order to overcome the deficiencies of the existing technology. The micro-linear vibrator that can vibrate in two frequencies and in two directions solves the problem that existing linear vibrators with only a single frequency cannot meet the demands of various tactile feedbacks.

  In order to achieve the above object, the technical scheme adopted by the present invention includes a support portion, a flexible circuit board, a coil, a displacement limiting piece, a shield, a magnet, a weight, a high frequency spring plate, The present invention provides a micro linear vibrator capable of vibrating in two frequencies and in two directions, including a frame, a positioning plate, a low-frequency welding plate, and a high-frequency welding plate.

  The flexible circuit board is affixed on the support portion, and one end of the coil is fixed on the flexible circuit board to constitute a stator of the vibrator, and the magnet and the shield overlap with each other on the weight. Fixed, one end of the high-frequency spring plate is fixed to both sides of the weight, and is fixed by welding through the high-frequency welding plate, the two high-frequency spring plates are symmetrical structures, The high-frequency vibrator of the vibrator is configured, and the high-frequency vibrator is installed in a space surrounded by the frame and the positioning plate, and is attached to the positioning plate via one end of the high-frequency spring plate. Connected and fixed, and the low frequency spring plate and the low frequency welding plate are overlapped and fixed on the positioning plate and the frame by laser welding, respectively, and the two low frequency springs above and below And the low frequency welding plate forms a vertically symmetrical structure to form a low frequency vibrator, the high frequency vibrator is installed in the low frequency vibrator, and the low frequency vibrator is It is installed in a space surrounded by the displacement limiting piece and the support part, and is connected and fixed to the displacement limiting piece and the support part through one end of the high frequency spring plate, respectively, and has two frequencies and two frequencies. The magnet is a cuboid, the shield overlaps one surface of the magnet, the other surface of the magnet faces the coil, and the magnetic field N pole and S of the magnet. The poles are split along a diagonal, and the coil is placed in the air gap magnetic field of the magnet and the support.

  Further, the high frequency spring plate is fixed symmetrically on both sides of the weight, and the low frequency spring plate is fixed symmetrically on both sides of the casing of the high frequency vibrator.

  In addition, the coil is installed on the stator, the end of the coil is welded onto the flexible circuit board, the flexible circuit board includes a current conversion circuit, and the current conversion circuit is for setting the frequency. Outputs pulsed DC power.

  Further, the high frequency resonance frequency is set to 300 Hz to 350 Hz, and the low frequency resonance frequency is set to 140 Hz to 180 Hz.

  Furthermore, the vibrator includes a housing including an upper cover and a lower cover, and a space formed by engaging the upper cover and the lower cover accommodates the vibrator.

  Advantages of the present invention: In the present invention, since the coil is installed on the stator, the power line is easy to fix. Thus, when the coil is installed on the vibrator, the power line can avoid fatigue failure due to vibration of the vibrator, thereby improving the reliability of the power line or the life of the vibrator.

  Based on the resonance principle, when the frequency of the drive current in the coil matches the natural frequency of the vibrator, the vibrator can be started at high speed, resulting in a faster response speed and response delay. Can be reduced.

  The structure adopting the present invention that can vibrate in two frequencies and in two directions has two natural frequencies and two vibration directions, and can provide tactile feedback at high and low frequencies. . An additional haptic feedback experience can be provided when high and low frequencies are mixed drive. By adjusting the mixing ratio of the high frequency and the low frequency, various tactile feedbacks can be obtained, and more experiences can be provided to the user.

  In order to describe the embodiments of the present invention or the technical solutions of the existing technology in detail, the following briefly introduces the accompanying drawings. Further, it is obvious that the drawings described below are merely some embodiments of the present invention, and other drawings can be obtained from these drawings on the premise that no creative labor is required for those skilled in the art.

FIG. 1 is a three-dimensional view of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 3 is an exploded view of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a stator of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 5 is a schematic view of a high frequency vibrator of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 6 is a schematic view of a low frequency vibrator of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 7 is a schematic view of a vibrating body of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention. FIG. 8 is a schematic view showing the vibration principle of a micro linear vibrator capable of vibrating in two frequencies and in two directions according to an embodiment of the present invention.

  To make it easier for those skilled in the art to understand the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. The embodiments are only some of the embodiments of the present invention, and are not all embodiments. Based on the embodiment of the present invention, any other embodiment obtained on the premise that a person skilled in the art does not perform creative labor falls within the protection scope of the present invention.

  In the micro linear vibrator capable of vibrating in two directions and in two directions according to the embodiment of the present invention, the high frequency and the low frequency are relative, and the width and thickness of the spring plate are determined. By changing, different frequencies can be obtained. Further, by exchanging the positions of the high-frequency spring plate and the low-frequency spring plate, the low-frequency vibrator and the high-frequency vibrator can be exchanged. For ease of explanation, the following example will be described based on the structure of FIG.

  1 to 7, the micro linear vibrator capable of vibrating in two frequencies and in two directions provided by the embodiment of the present invention includes a support part 11, a flexible circuit board 12, a coil 13, and a buffer part 14. , Displacement limiting piece 15, shield 21, magnet 22, weight 23, high frequency spring plate 24, high frequency weld plate 25, frame 31, positioning plate 32, low frequency weld plate 33, low frequency spring plate 34, A lower cover 51 and an upper cover 52 are provided. For ease of explanation, the structure further comprises a stator 10, a high frequency oscillator 20, a low frequency oscillator 30 and a vibrating body 40.

  As shown in FIG. 4, the flexible circuit board 12 is attached on the support part 11, the buffer part 14 is attached on the flexible circuit board 12, and one end of the coil 13 is fixed on the flexible circuit board 12, One end of the coil 13 is welded onto the flexible circuit board 12 and supplied with power lines inside the flexible circuit board 12, and the stator 10 of the vibrator is configured by the above structure.

  As shown in FIG. 5, the magnet 22 and the shield 21 are overlapped and fixed to both ends of the weight 23, and the high frequency spring plate 24 is in contact with the side surface of the weight 23 and is engaged via the high frequency weld plate 25. Then, by fixing by laser welding, two high-frequency spring plates 24 are respectively installed on both sides of the weight 23 to form a symmetrical structure, and the high-frequency vibrator 20 is configured.

  As shown in FIG. 6, the high-frequency spring plate 24 and the positioning plate 32 on the high-frequency vibrator 20 are fitted to each other, the frame 31 is engaged with the positioning plate 32, and the high-frequency spring plate 24 is By pushing the lower end and being fixed by laser welding, the high frequency vibrator 20 is surrounded and fixed. The low frequency spring plate 34 and the low frequency weld plate 33 are overlapped and fixed on the positioning plate 32 and the frame 31 by laser welding, respectively, and the two low frequency spring plates 34 and the low frequency weld plate 33 are vertically moved. A low frequency vibrator 30 is formed by forming a symmetric structure. The high frequency vibrator 20 is installed in the low frequency vibrator 30.

  As shown in FIG. 7, the low frequency spring plate 34 and the low frequency welding plate 33 on the upper side of the low frequency vibrator 30 are overlapped and fixed on the displacement limiting piece 15 by laser welding. The low frequency spring plate 34 and the low frequency weld plate 33 on the lower side of 30 are overlapped and fixed on the stator 10 by laser welding. With the above structure, the vibrating body 40 that can vibrate in two frequencies and in two directions is configured.

As shown in FIG. 8, the coil 13 and the magnet 22 face each other, the magnet 22 is a rectangular parallelepiped, and the N pole and S pole of the magnetic field are obliquely divided along the diagonal line. The coil 13 is in the air gap magnetic field of the magnet 22 and the support portion 11, and generates an electromagnetic force when energized. The magnet 22 receives an electromagnetic force F perpendicular to the dividing line of the magnetic field. Referring to the coordinate system of FIG. 8, the electromagnetic force F generates two components F _X and F _Z in both the horizontal and vertical directions, respectively. The component F _X drives the horizontal movement of the high frequency oscillator 20, and the component F _Z drives the vertical movement of the low frequency oscillator 30.

When driving at low-frequency current, by the action of the component F _Z, low frequency oscillator 30 resonates. The low frequency spring plate 34 realizes synchronous conversion of kinetic energy and elastic potential energy, and reciprocates alternately in the vertical direction to exhibit low frequency vibration. At this time, since the component F _X is not on the resonance point of the high-frequency vibrator, it does not exhibit a large vibration.

When driven by a high frequency current, the high frequency vibrator 20 resonates due to the action of the component F _X. The high-frequency spring plate 24 realizes synchronous conversion of kinetic energy and elastic potential energy, and reciprocates alternately in the vertical direction to exhibit high-frequency vibration. At this time, since the component F _X is not at the resonance point of the low-frequency vibrator, no obvious vibration is exhibited.

In the case of mixed driving with a low frequency current and a high frequency current, the high frequency current component F _X drives the resonance of the high frequency oscillator 20, and the low frequency current component F _Z causes the resonance of the low frequency oscillator 30. The vibration to drive and express is between high and low frequencies. By adjusting the mixing ratio of the low frequency and the high frequency, different vibrations can be exhibited.

  The shield 21 and the support part 11 are made of a material having a high magnetic permeability, and a closed loop is formed between the magnet 22 and the support part 11 to prevent magnetic leakage, thereby preventing air leakage between the magnet 22 and the support part 11. Since the magnetic induction strength of the gap is improved, as a result, the electromagnetic force generated when the coil 13 is energized is improved, and the conversion efficiency between electric energy and mechanical vibration energy is improved.

  In one embodiment, the buffer portion 14 is affixed on the flexible circuit board 12 and faces the side surface of the magnet 22, and the two buffer portions 14 are used symmetrically. The buffer portion 14 can buffer the vibration force generated by the vibrator, avoid the occurrence of a situation where the vibration force is too large, and prevent the spring plate from being damaged.

  In addition, an electric line is installed in the flexible circuit board 12, and a drive circuit can also be installed on it. Although it can be realized by a chip, a separated part, etc., it is not limited to these.

  Note that the method of fixing the coil 13 on the flexible circuit board 12 may be welding, riveting, adhesion, or binding. In one embodiment, the coil 13 is welded to the flexible circuit board 12 while being secured with UV adhesive.

  In one embodiment, the weight 23 can be formed by stacking a plurality of parts to facilitate weight adjustment. In the present embodiment, by setting the weight of the weight 23 and adjusting the weights of the high-frequency vibrator 20 and the low-frequency vibrator 30, different vibration accelerations (vibration amounts) can be obtained. When the weight of the vibrator is large, the generated vibration force is relatively large, and when the weight of the vibrator is light, the generated vibration force is relatively small. This allows the vibrator to be given wider selectivity, satisfying different haptic feedback requirements and widening the range of use.

  In this embodiment, most of the connections employ laser welding, but methods such as integral molding and riveting may also be employed, but are not limited thereto.

  In one embodiment, the vibrator further includes an outer housing composed of an upper cover 52 and a lower cover 51. In order to protect the vibrating body from water, dust, and collision, and to improve the reliability of the vibrating body, the vibrating body can be accommodated in the outer casing.

  In a specific implementation step, the coil 13 can pass either a unidirectional rectangular wave pulse direct current, a bidirectional rectangular wave pulse current, or a sine wave alternating current. Here, when the coil 13 is passing a positive and negative pulse current of a bidirectional rectangular wave, stronger vibration can be obtained when the coil 13 is a unidirectional rectangular wave pulse direct current.

  As used herein, the terms “comprising”, “comprising”, or any other variation thereof, are intended to cover non-exclusive inclusions, and thus A process, method, article, or device that includes a list does not include only those elements, but includes other elements not explicitly listed or inherent in such processes, methods, articles, or devices. be able to. In the absence of other limitations, an element defined by the term “including” does not exclude the presence of the same element in a process, method, article, or device of the element.

  The above embodiments are used only to illustrate the technical solution of the present invention and are not intended to be limiting. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can modify the technical scheme described in the above embodiments and replace some of the technical features equivalently. I want you to understand. Also, these modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

DESCRIPTION OF SYMBOLS 11: Support part 12: Flexible circuit board 13: Coil 14: Buffer part 15: Displacement limiting piece 21: Shield 22: Magnet 23: Weight 24: High frequency spring plate 25: High frequency welding plate 31: Frame 32: Positioning Plate 33: Low frequency rivet plate 34: Low frequency spring plate 51: Lower cover 52: Upper cover

Claims (5)

Support, flexible circuit board, coil, displacement limiting piece, shield, magnet, weight, high frequency spring plate, frame, positioning plate, low frequency welding plate, high frequency A micro linear vibrator capable of vibrating in two directions and two directions with a weld plate,
The flexible circuit board is affixed on the support, and one end of the coil is fixed on the flexible circuit board to constitute a stator of the vibrator,
The magnet and the shield overlap and are fixed on the weight, one end of the high-frequency spring plate is fixed on both sides of the weight, and is welded and fixed via the high-frequency welding plate. The high-frequency spring plate has a symmetrical structure, and constitutes a high-frequency vibrator of the vibrator,
The high frequency vibrator is installed in a space surrounded by the frame and the positioning plate, and is connected and fixed to the positioning plate via one end of the high frequency spring plate, and the low frequency spring plate and the Low frequency welded plates are overlapped and fixed on the positioning plate and the frame by laser welding, respectively, and the upper and lower low frequency spring plates and the low frequency welded plate form a vertically symmetric structure to reduce vibration. Configuring a high frequency oscillator, the high frequency oscillator is installed in the low frequency oscillator,
The low frequency vibrator is installed in a space surrounded by the displacement limiting piece and the support portion, and is connected and fixed to the displacement limiting piece and the support portion via one end of the high frequency spring plate. A vibrating body that can vibrate in two frequencies and in two directions,
The magnet is a rectangular parallelepiped, the shield overlaps one surface of the magnet, the other surface of the magnet faces the coil, and the magnetic field N pole and S pole of the magnet are divided along a diagonal line. Is installed in the air gap magnetic field of the magnet and the support, and is a micro linear vibrator capable of vibrating in two frequencies and in two directions.   2. The high-frequency spring plate is fixed symmetrically on both sides of the weight, and the low-frequency spring plate is fixed symmetrically on both sides of the casing of the high-frequency vibrator. A micro linear vibrator capable of vibrating in two frequencies and two directions.   The coil is installed on the stator, the end of the coil is welded to the flexible circuit board, the flexible circuit board is provided with a current conversion circuit, and the current conversion circuit is a pulse direct current for setting the frequency. The micro linear vibrator capable of vibrating in two directions and in two directions according to claim 1.   The high frequency resonance frequency is set to 300 Hz to 350 Hz, and the low frequency resonance frequency is set to 140 Hz to 180 Hz. Possible micro linear vibrator.   The said vibrator is provided with the housing | casing which consists of an upper cover and a lower cover, The space comprised by the said upper cover and the said lower cover engaging contains the said vibrator. A micro linear vibrator capable of vibrating in the two frequencies and two directions described.