Z-direction broadband linear vibrator and electronic touch device

Abstract

The invention relates to the technical field of electronic touch control vibration feedback, in particular to a Z-direction broadband linear vibrator and an electronic touch control device.The Z-direction broadband linear vibrator comprises an upper shell, a lower shell, a vibrator assembly, a stator assembly and elastic pieces which are elastically connected to the upper side surface and the lower side surface of the vibrator assembly and the inner walls of the upper shell and the lower shell correspondingly; the upper shell and the lower shell are buckled to form an accommodating space, the stator assembly and the vibrator assembly are accommodated in the accommodating space, the stator assembly comprises a first flexible circuit board, a first coil, a second flexible circuit board and a second coil, the first flexible circuit board and the first coil are fixed on the inner wall of the upper shell, and the second flexible circuit board is fixed on the inner wall of the lower shell. The second flexible circuit board and the second coil are fixed on the inner wall of the lower shell, the vibrator assembly comprises a mass block provided with a central through hole and a magnet fixed in the central through hole, and the vibrator assembly is located between the first coil and the second coil. The Z-direction broadband linear vibrator applied to the electronic touch device is short in response time and high in vibration sense, and richer vibration sense experience can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic touch vibration feedback, and particularly to a Z-axis broadband linear vibrator and an electronic touch device. Background Art

[0002] As vibration motors are widely used in electronic products such as smart phones, wearable devices, tablet computers, medical devices, vehicle touch devices, and learning touch devices, the vibration generated by the vibration motor is used to give feedback information to the user. For example, when dialing on a touch screen or identifying information with a stylus, vibration feedback is generated to prompt the user about the usage of such electronic devices. The strength of the vibration sensation of the vibration motor and the response speed of the vibration determine the quality of the vibration sensation experience. Therefore, there is an urgent need for a vibration motor with fast response and stronger vibration sensation to meet the more diverse vibration sensation experiences of users. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a Z-axis broadband linear vibrator and an electronic touch device, aiming to solve the problems of slow response speed and insufficient vibration amount of the existing vibration motor. The specific technical solutions are as follows:

[0004] A Z-axis broadband linear vibrator includes an upper housing, a lower housing, a vibrator assembly, a stator assembly, and elastic members respectively elastically connected to the upper and lower surfaces of the vibrator assembly and the inner walls of the upper and lower housings. The upper housing and the lower housing are snapped together to form an accommodation space. The stator assembly and the vibrator assembly are spaced and accommodated in the accommodation space. The stator assembly includes a first flexible circuit board, a first coil, a second flexible circuit board, and a second coil. The first flexible circuit board and the first coil are fixed to the inner wall of the upper housing, and the second flexible circuit board and the second coil are fixed to the inner wall of the lower housing. The vibrator assembly includes a mass block provided with a central through hole and a magnet fixed in the central through hole. The elastic members are respectively fixedly connected to the upper and lower surfaces of the mass block to suspend the vibrator assembly in the accommodation space. The vibrator assembly is spaced between the first coil and the second coil.

[0005] Preferably, iron cores are provided in the first coil and the second coil.

[0006] Preferably, the first flexible circuit board and the second flexible circuit board are respectively provided with a first internal electrical connection end and a second internal electrical connection end, as well as a first connection portion and a second connection portion. The second flexible circuit board is further provided with an external electrical connection end. The first connection portion and the second connection portion are electrically connected to each other outside the accommodation space, and the external electrical connection end extends out of the accommodation space.

[0007] Preferably, the first internal electrical connection end and the second internal electrical connection end are respectively provided with a first through hole and a second through hole adapted to the iron cores.

[0008] Preferably, the upper housing is provided as a rectangular frame body with one end open, including a bottom wall and side walls. On the left and right sides of the inner surface of the bottom wall, first bosses are symmetrically arranged; the lower housing is provided as a plate shape, and second bosses are arranged at positions corresponding to the first bosses; the first flexible circuit board and the first coil are arranged between the first bosses, and the second flexible circuit board and the second coil are arranged between the second bosses.

[0009] Preferably, each elastic member respectively includes a mass block fixed end, a housing fixed end, and two elastic arms obliquely connected between the mass block fixed end and the housing fixed end, and a notch is formed between the elastic arms.

[0010] Preferably, the mass block fixed ends of the upper and lower elastic members are respectively fixedly connected to the upper and lower surfaces of the diagonal of the mass block, and the housing fixed ends are respectively fixedly connected to a group of the first bosses and the second bosses at the diagonals of the upper housing and the lower housing; buffer members are respectively arranged on the other group of the first bosses and the second bosses.

[0011] Preferably, electromagnetic damping sheets are respectively arranged on the inner walls of the two long sides of the side walls corresponding to the magnets.

[0012] Preferably, relief grooves are provided on the two side walls of the mass block corresponding to the electromagnetic damping sheets.

[0013] The present invention also provides an electronic touch control device, including a Z - direction broadband linear vibrator according to any one of claims 1 to 9.

[0014] Compared with the prior art, the Z - direction broadband linear vibrator applied in the electronic touch control device of the present invention has a short response time and a strong vibration feeling, and can realize a richer vibration feeling experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the Z - direction broadband linear vibrator of the present invention.

[0016] Figure 2 is a Y - direction cross - sectional view of the Z - direction broadband linear vibrator of the present invention.

[0017] Figure 3 is an X - direction cross - sectional view of the Z - direction broadband linear vibrator of the present invention.

[0018] Figure 4 is an exploded view of the structure of the Z - direction broadband linear vibrator of the present invention.

[0019] Figure 5 is an exploded view of the structure of the oscillator assembly and the elastic member of the present invention.

[0020] Wherein:

[0021] 1 - Upper housing; 10 - Bottom wall; 12 - Side wall, 13 - First boss;

[0022] 2 - Lower housing; 20 - Second boss;

[0023] 3 - Stator assembly; 310 - First flexible circuit board; 311 - First internal electrical connection terminal; 312 - First connection part;

[0024] 313 - First through hole; 320 - First coil; 330 - Iron core; 340 - Second flexible circuit board;

[0025] 341 - Second internal electrical connection terminal; 342 - Second connection part; 343 - Second through hole; 344 - External electrical connection terminal;

[0026] 350 - Second coil;

[0027] 4 - Oscillator assembly; 41 - Mass block; 410 - Central through hole; 411 - Relief groove; 42 - Magnet;

[0028] 5 - Elastic member; 51 - Mass block fixed end; 52 - Housing fixed end; 53 - Elastic force arm; 54 - Cutout;

[0029] 6 - Buffer member;

[0030] 7 - Electromagnetic damping sheet. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] A Z - direction broadband linear vibrator structure provided by the present invention is as shown in Figure 1 and Figure 2 , and includes an upper housing 1, a lower housing 2, a stator assembly 3, an oscillator assembly 4, and an elastic member 5 that is elastically connected to the upper and lower surfaces of the oscillator assembly 4 and the inner walls of the upper housing 1 and the lower housing 2 respectively. The upper housing 1 and the lower housing 2 are snapped together to form an accommodation space, and the stator assembly 3 and the oscillator assembly 4 are spaced apart and accommodated in the accommodation space. Among them, the X - direction is the left - right long - side direction, the Y - direction is the front - back short - side direction, and the Z - direction is the up - down vertical vibration direction. The vibrator of the present invention utilizes the principle of electromagnetic induction. By energizing the stator assembly 3, the oscillator assembly 4 equipped with a magnet 42 is driven to perform a reciprocating cyclic motion in the Z - direction, so as to make the vibrator generate a vibration sensation.

[0033] The stator assembly 3 includes a first flexible circuit board 310, a first coil 320, a second flexible circuit board 340, and a second coil 350. The first flexible circuit board 310 and the first coil 320 are fixed to the inner wall of the upper housing 1, and the second flexible circuit board 340 and the second coil 350 are fixed to the inner wall of the lower housing 2. Iron cores 330 are respectively arranged inside the first coil 320 and the second coil 350, and the arrangement of the iron cores 330 plays a role in concentrating magnetic fields. The first flexible circuit board 310 and the second flexible circuit board 340 are respectively provided with a first internal electrical terminal 311 and a second internal electrical terminal 341, as well as a first connection portion 312 and a second connection portion 342. The second flexible circuit board 340 is further provided with an external electrical terminal 344. The first coil 320 is fixed on the first internal electrical terminal 311, and the second coil 350 is fixed on the second internal electrical terminal 341. The first connection portion 312 and the second connection portion 342 are electrically connected to each other outside the accommodation space. The first connection portion 312 and the second connection portion 342 respectively extend from the first internal electrical terminal 311 and the second internal electrical terminal 341 and protrude out of the housing. To save the installation space of the vibrator, the first connection portion 312 and the second connection portion 342 overlap and are welded and fixed to the outer surface of the side wall of the upper housing 1. The external electrical terminal 344 protrudes out of the accommodation space to connect to an external power supply. The vibrator of the present invention can achieve a greater driving force through the arrangement of the double coils and the iron cores 330. The structure of splicing the first flexible circuit board 310 and the second flexible circuit board 340 is adopted to realize the electrical connection of the first coil 320 and the second coil 350, and power is supplied to the second coil 350 through the external electrical terminal 344. The first internal electrical terminal 311 and the second internal electrical terminal 341 are respectively provided with a first through hole 313 and a second through hole 343 adapted to the iron cores 330. The iron cores 330 are respectively limited in the first through hole 313 and the second through hole 343. Through glue, the coils, iron cores, and flexible circuit boards on the upper and lower sides can be glued together to enhance the stable bonding force of the stator assembly 3, thereby ensuring the reliability of the vibrator.

[0034] The oscillator assembly 4 includes a mass block 41 provided with a central through hole 410 and a magnet 42 fixed inside the central through hole 410. Elastic members 5 are respectively fixedly connected to the upper and lower surfaces of the mass block 41 to suspend the oscillator assembly 4 in the accommodation space. The oscillator assembly 4 is spaced between the first coil 320 and the second coil 350. Using the principle of electromagnetic induction, power is supplied to the first coil 320 and the second coil 350 through the external electrical terminal 344, driving the oscillator assembly 4 equipped with the magnet 42 to perform a reciprocating circular motion in the Z direction, thereby making the vibrator generate a vibration sensation.

[0035] The upper housing 1 is set as a rectangular box body with one end open, including a bottom wall 10 and side walls 11. On the inner surface of the bottom wall 10, first bosses 13 are symmetrically arranged on the left and right sides. On the inner walls of the long sides of the side walls 11, electromagnetic damping sheets 7 are fixed corresponding to the positions of the magnets 42 to achieve a greater damping force for the vibrator. Since the electromagnetic damping sheets 7 are less affected by temperature, the consistency of the vibrator damping can be improved, enabling the vibrator to obtain a wider vibration range, a faster start-up time, and a shorter stop time, thereby enhancing the driving force of the vibrator and the response speed of the vibration. Preferably, the electromagnetic damping sheets 7 are copper sheets or other metal sheets with high conductivity; on the two side walls of the mass block 41, relief grooves 411 are provided corresponding to the electromagnetic damping sheets 7: the lower housing 2 is set as a plate shape, and second bosses 20 are provided corresponding to the positions of the first bosses 13; the first internal electrical connection end 311 and the first coil 320 are arranged between the first bosses 13, and the second internal electrical connection end 341 and the second coil 350 are arranged between the second bosses 20.

[0036] The elastic members 5 respectively include a mass block fixed end 51, a housing fixed end 52, and two elastic arms 53 obliquely connected between the mass block fixed end 51 and the housing fixed end 52. A notch 54 is formed between the elastic arms 53. The mass block fixed ends 51 of the upper and lower elastic members 5 are respectively fixedly connected to the upper and lower surfaces of the diagonal corners of the mass block 41, and the housing fixed ends 52 are respectively fixedly connected to a set of first bosses 13 and second bosses 20 at the diagonal corners of the upper housing 1 and the lower housing 2; so that the upper and lower elastic members 5 are arranged in a rhombus shape, enabling the vibrator to generate stable Z-direction vibration; buffer members 6 are respectively arranged on the other set of diagonal first bosses 13 and second bosses 20. Preferably, the heights of the first bosses 13 and the second bosses 20 are respectively greater than or equal to the heights of the first coil 320 and the second coil 350. During the up and down vibration of the oscillator assembly 4, the buffer members 6 arranged on the first bosses 13 and the second bosses 20 are used to prevent the first coil 320 and the second coil 350 from being impacted by the oscillator assembly 4. At the same time, by adjusting the thickness of the buffer members 6, the reciprocating vibration stroke of the oscillator assembly 4 can be preset. At the same time, the buffer members 6 respectively corresponding to the mass block fixed end 51 can prevent the mass block fixed end 51 from being directly and rigidly impacted by the first bosses 13 and the second bosses 20 and reduce the service life of the elastic member 5, so as to achieve the reliability of the vibrator. Preferably, the buffer members 6 are set as foam. At the same time, to obtain a greater driving force to meet the more abundant vibration feeling experience of users, usually the volume of the magnet 42 is increased. In the embodiment of the present invention, the Z-direction space formed by the first bosses 13 and the second bosses 20 can be utilized to lengthen the Z-direction height of the magnet 42. The width of the notch 54 of the elastic member 5 should be greater than the Y-direction width of the magnet 42. During the up and down vibration of the oscillator assembly 4, the notch 54 can play a role in making way for the magnet 42.

[0037] The present invention further provides an electronic touch control device, which includes the Z-axis broadband linear vibrator described above and can generate vibration feedback during, for example, human-computer interaction. The electronic touch control device can be, for example, an electronic stylus, a mobile phone touch screen, a tablet computer touch screen, a wearable device touch screen, a vehicle-mounted touch screen, a medical device touch screen, etc. The vibrator used in the electronic touch control device of the present invention realizes the balance of vibration by elastically connecting and fixing the oscillator assembly 4 between the upper and lower housings 1 and 2 by parallelly arranging elastic members 5 on the upper and lower sides of the oscillator assembly 4. Double coils 320 and 350 with iron cores 330 are arranged on the inner walls of the upper and lower housings 1 and 2 to form an interval for clamping the magnet 42 to enhance the magnetic field driving force. Protrusions 13 and 20 are symmetrically arranged on the left and right sides of the inner wall surfaces of the upper and lower housings 1 and 2 to protect the coils 320 and 350 and enhance the balance. Buffer members 6 are arranged on a pair of diagonal protrusions 13 and 20 for limiting the Z-axis vibration stroke of the oscillator assembly 4 and improving the vibration performance. Electromagnetic damping sheets 7 are arranged along the X-axis on both sides of the side wall of the upper housing 1 to enhance the damping and have high damping consistency, so that the overall vibrator obtains a wider vibration range, a faster start-up time, a shorter stop time, and a stronger driving force, thereby improving the execution reliability of the vibrator, and thus realizing a Z-axis broadband linear vibrator with a wide frequency range, having many advantages such as fast response speed and strong vibration feeling, enabling users to experience better immersive, delicate, and rich tactile interactions.

[0038] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Z-direction broadband linear vibrator, comprising an upper shell, a lower shell, a vibrator assembly, a stator assembly, and elastic members elastically connected to the upper and lower surfaces of the vibrator assembly and the inner walls of the upper shell and the lower shell, respectively, wherein the upper shell and the lower shell are buckled to form an accommodation space, and the stator assembly and the vibrator assembly are accommodated in the accommodation space at intervals, characterized in that: The stator assembly includes a first flexible circuit board, a first coil, a second flexible circuit board and a second coil. The first flexible circuit board and the first coil are fixed to the inner wall of the upper shell, and the second flexible circuit board and the second coil are fixed to the inner wall of the lower shell. The vibrator assembly includes a mass block with a central through hole and a magnet fixed in the central through hole. The elastic member is respectively fixedly connected to the upper and lower surfaces of the mass block to suspend the vibrator assembly in the accommodating space. The vibrator assembly is located between the first coil and the second coil.

2. The Z-direction broadband linear vibrator according to claim 1, characterized in that: An iron core is disposed inside the first coil and the second coil.

3. The Z-direction broadband linear vibrator according to claim 2, characterized in that: The first flexible circuit board and the second flexible circuit board are respectively provided with a first internal electrical terminal and a second internal electrical terminal and a first connecting portion and a second connecting portion, and the second flexible circuit board is also provided with an external electrical terminal, the first connecting portion and the second connecting portion are electrically connected to each other outside the accommodating space, and the external electrical terminal extends out of the accommodating space.

4. The Z-direction broadband linear vibrator according to claim 3, characterized in that: The first inner electrical terminal and the second inner electrical terminal are respectively adapted to be provided with a first through hole and a second through hole corresponding to the iron core.

5. The Z-direction broadband linear vibrator according to claim 4, characterized in that: The upper shell is configured as a rectangular frame with one end open, including a bottom wall and side walls, and the first bosses are symmetrically arranged on the left and right sides of the inner surface of the bottom wall; the lower shell is configured as a plate, and the second boss is arranged at the position corresponding to the first boss; the first internal electrical terminal and the first coil are arranged between the first bosses, and the second internal electrical terminal and the second coil are arranged between the second bosses.

6. The Z-direction broadband linear vibrator according to claim 5, characterized in that: The elastic member comprises a mass block fixed end, a shell fixed end, and two elastic arms obliquely connected between the mass block fixed end and the shell fixed end, with a cutout formed between the elastic arms.

7. The Z-direction broadband linear vibrator according to claim 6, characterized in that: The fixed ends of the mass blocks of the upper and lower elastic members are respectively fixedly connected to the upper and lower surfaces of the mass blocks at opposite corners, and the fixed ends of the shell are respectively fixedly connected to a group of the first bosses and the second bosses at opposite corners of the upper shell and the lower shell; another group of the first bosses and the second bosses are respectively provided with buffer members.

8. The Z-direction broadband linear vibrator according to claim 7, characterized in that: Electromagnetic damping sheets are provided on inner walls on both sides of the long sides of the side wall respectively corresponding to the magnets.

9. The Z-direction broadband linear vibrator according to claim 8, characterized in that: The two side walls of the mass block are provided with clearance grooves corresponding to the electromagnetic damping sheet.

10. An electronic touch device, characterized in that: It comprises the Z-direction broadband linear vibrator as claimed in any one of claims 1 to 9.

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