Z-direction broadband vibration device

Abstract

The invention relates to the field of tactile feedback devices, and discloses a Z-direction broadband vibration device which comprises a vibrator part and a stator part, the vibrator part is composed of a parallel elastic piece, a convex-concave metal plate, a mass block, a permanent magnet and an upper metal plate, and the stator part is composed of a lower shell, an iron core, a coil and an F-PCB; the flat elastic sheet adopts a rectangular annular structure, so that the welding area is increased, the process is simplified, and the connection strength and reliability are improved; bulges are arranged at four corners of the convex-concave metal plate, so that the mass block is prevented from being in direct contact with the elastic sheet during falling, and the elastic sheet is prevented from deforming The integrated design of the iron core and the metal plate simplifies the assembly process, improves the impact resistance and the vibration performance, reduces the manufacturing cost, and prolongs the service life of the product. By optimizing the structural design and simplifying the production process, the stability, impact resistance and production efficiency of the vibration device are improved, the manufacturing cost is reduced, and the service life of the product is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of tactile feedback devices, in particular to a Z-direction broadband vibration device. Background Art

[0002] At present, Z-axis linear motors have been widely used in tactile feedback of smart devices due to their fast response speed and large vibration energy. However, linear motors in the prior art face many problems in the manufacturing process, which affect their performance and reliability.

[0003] First, the traditional spring clip design structure is complex and the manufacturing process requirements are high, resulting in uneven distribution of spring clip sizes, increasing the difficulty of welding and possibly causing the spring clip to fall off due to loose welding. In addition, existing linear motors usually use foam or magnetic fluid as damping materials. The location of the foam paste affects the stress of the spring clip and shortens the service life of the product. The magnetic fluid is easily affected by temperature changes, resulting in unstable vibration performance, and it is easy for the magnetic fluid to splash during the drop test, increasing the risk of noise and poor performance.

[0004] In order to improve the vibration effect, a broadband electromagnetic damping structure combining upper and lower magnetic plates and an iron core is usually used in the design of linear motors. However, since the concentricity between the iron core and the vibrator is difficult to control, wear and noise problems often occur. In addition, the assembly process of the iron core and the metal plate is cumbersome, involving glue dispensing and curing processes, which increases production costs and complexity.

[0005] Therefore, the existing Z-axis linear motor has problems of insufficient reliability, complex process and high cost in manufacturing and use, and an improved design is urgently needed to overcome these defects. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a Z-direction broadband vibration device, which solves the problems of the existing Z-direction linear motor, such as complex manufacturing process, poor welding firmness, insufficient impact resistance and high production cost.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A Z-direction broadband vibration device, comprising:

[0008] A vibrator part, the vibrator part comprising:

[0009] A flat spring sheet, which is a planar structure and increases the contact area with other components, and is welded to the convex and concave metal plate and the support platform of the lower shell respectively;

[0010] The convex-concave metal plate has convex structures at its four corners, which are used to prevent the mass block from directly contacting the flat spring piece when falling;

[0011] A mass block, welded and fixed to the convex-concave metal plate;

[0012] A permanent magnet is fixed to one side of the mass block;

[0013] An upper metal plate, arranged on the upper part of the permanent magnet, for fixing the permanent magnet;

[0014] A stator part, the stator part comprising:

[0015] The lower shell has support platforms on both sides and a boss through hole in the center;

[0016] An integrated iron core structure is installed in the boss through hole of the lower shell;

[0017] A coil, wound around the iron core;

[0018] F-PCB, connected to the coil;

[0019] The upper shell cooperates with the lower shell to form a closed cavity.

[0020] Preferably, the flat spring piece includes a spring piece body in a rectangular ring structure, an opening is provided in the middle of the spring piece body, and two opposite sides of the opening are respectively provided with welding areas for welding with a support platform or a convex-concave metal plate.

[0021] Preferably, the welding area adopts a folded and flattened design, and the folding directions of two adjacent welding areas are opposite.

[0022] Preferably, the convex-concave metal plate comprises a metal plate body which is a rectangular planar structure, a rectangular hole is provided through the middle of the metal plate body, and protrusions are provided in a rectangular parallelepiped shape at the four corners of the metal plate body.

[0023] Preferably, a pair of opposite edges located at the metal plate body are provided with a chamfer design to facilitate welding of the convex and concave metal plate and the mass block.

[0024] Preferably, the core integrated structure is an integration of the fixed structure and the core, which simplifies the production process.

[0025] Preferably, the coil is wound around the outside of the integrated iron core structure, and an F-PCB is arranged at the bottom and is arranged in the boss through hole of the lower shell.

[0026] Preferably, the lower shell includes a shell body, which is a rectangular flat plate structure. The boss through hole is located in the center of the shell body, which is a rectangular frame structure. Support platforms are provided on both sides of the shell. The support platforms are strip-shaped raised structures, which are used to simplify the product structure, increase the welding operation area, and reduce the process difficulty.

[0027] The present invention provides a Z-direction broadband vibration device, which has the following beneficial effects:

[0028] 1. The present invention simplifies the stamping process and reduces the need for complex mold manufacturing by adopting a flat spring sheet structure. Compared with traditional spring sheets with complex shapes, the manufacturing process of flat spring sheets is simpler, which not only improves production efficiency but also significantly reduces production costs, especially in large-scale production.

[0029] 2. The welding area of ​​the flat spring piece of the present invention adopts a folded flat design, which increases the welding contact area and reduces stress concentration by designing the folding direction in the opposite direction. This design greatly improves the reliability of the welding process, avoids the problem of spring piece loosening or desoldering caused by welding stress, and ensures the stability of the product in long-term use.

[0030] 3. The four corners of the convex-concave metal plate of the present invention are designed with convex structures, which effectively avoids direct contact between the mass block and the shrapnel during falling impact, thereby preventing the plastic deformation of the shrapnel. This design improves the impact resistance of the device in the event of accidental impact or falling, ensuring the reliability and service life of the product.

[0031] 4. The present invention eliminates the traditional glue dispensing and metal sheet bonding process through the design of the integrated iron core structure. The integrated fixing method of the iron core and the metal plate greatly shortens the assembly time, simplifies the process steps, effectively improves the production efficiency, and reduces the process complexity.

[0032] 5. The convex and concave metal plate design adopted by the present invention has a chamfered structure at the edge of the metal plate body, which reduces the stress concentration phenomenon during welding and ensures the accuracy and firmness of the welding process. At the same time, it avoids micro cracks or looseness during the welding process, effectively improves the anti-fatigue ability of the device, and prolongs the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an exploded view of the device structure of the present invention;

[0034] Figure 2 It is a schematic cross-sectional view of the device of the present invention;

[0035] Figure 3 It is a cross-sectional schematic diagram of the device of the present invention from another viewing angle;

[0036] Figure 4 It is a schematic diagram of the installation of the device of the present invention;

[0037] Figure 5 It is a schematic diagram of installation of the device of the present invention from another perspective;

[0038] Figure 6 It is a schematic diagram of the flat spring piece structure of the present invention;

[0039] Figure 7 It is a schematic diagram of the convex-concave metal plate structure of the present invention;

[0040] Figure 8 It is a schematic diagram of the lower shell structure of the present invention.

[0041] Among them, 101, flat spring piece; 101a, opening; 101b, welding area; 102, convex and concave metal plate; 102a, rectangular hole; 102b, chamfer design; 103, raised structure; 104, mass block; 105, permanent magnet; 106, upper metal plate; 201, lower shell; 202, support platform; 203, boss through hole; 204, iron core integrated structure; 205, coil; 206, F-PCB; 207, upper shell. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Please see attached Figure 1 -Attached Figure 8 , an embodiment of the present invention provides a Z-direction broadband vibration device, which improves the vibration performance and reliability of the device by optimizing the structural design and simplifying the manufacturing process, and is suitable for tactile feedback scenarios of smart devices. The design of the device focuses on broadband response to ensure stable vibration performance in impact scenarios such as falling, and effectively reduce production costs. The specific structure includes a vibrator part and a stator part, and the two parts are suspended in a closed cavity by elastic supports to achieve stable operation of the vibration device.

[0044] The structure of the oscillator is as follows:

[0045] Flat shrapnel 101:

[0046] The present invention uses a flat spring piece 101 as an important component of the vibrator part. The flat spring piece is a planar structural design. Compared with the traditional spring pieces with complex shapes (such as "V", "C", and "Z" shapes), the flat spring piece increases the contact area with the convex and concave metal plate 102 and the lower shell 201, increases the welding area, improves the reliability of welding, and reduces the difficulty of the welding process. At the same time, the structural design of the flat spring piece 101 simplifies the stamping process and reduces the manufacturing cost.

[0047] Concave and convex metal plate 102:

[0048] The four corners of the convex-concave metal plate 102 are provided with protruding structures 103, which can effectively prevent the mass block 104 from directly contacting the flat spring sheet 101 when the device falls, prevent the spring sheet from plastically deforming due to impact, and ensure the stability of the device during the fall impact. The convex-concave metal plate 102 and the mass block 104 are fixed by welding.

[0049] Mass 104:

[0050] The mass block 104 is welded with the convex and concave metal plate 102, serving as the mass center of the vibration device, effectively increasing the kinetic energy of the vibrator. This design ensures that the vibration device provides sufficient vibration energy in a short time.

[0051] Permanent magnet 105:

[0052] The permanent magnet 105 is fixed on one side of the mass block 104 and cooperates with the coil 203 of the stator part to generate electromagnetic force to promote the linear motion of the vibrator and finally achieve stable vibration.

[0053] Upper metal plate 106:

[0054] The upper metal plate 106 is disposed on the upper part of the permanent magnet 105 and is a planar rectangular structure, and its size matches the size of the permanent magnet 105. The upper metal plate 106 is connected to the upper part of the permanent magnet 105 by welding or other fixing methods;

[0055] The structure of the stator is as follows:

[0056] Lower housing 201:

[0057] The lower housing 201 is the main supporting structure of the stator part, and support platforms 202 are provided on both sides thereof, which are welded to the flat spring sheet 101 to provide stable support and structural reliability. A boss through hole 203 is provided in the center of the lower housing 201 for the integrated structural installation of the iron core 204, which effectively reduces the difficulty of assembly.

[0058] Core integrated structure 204:

[0059] The integrated design of the core structure 204 and the metal plate simplifies the dispensing assembly process of the core and the metal plate, effectively shortens the production cycle and reduces the manufacturing cost. The core 204 is installed in the boss through hole 203 of the lower shell 201 and cooperates with the coil 205 to generate electromagnetic force.

[0060] Coil 205:

[0061] The coil 205 is wound around the iron core 204, and generates a magnetic field when energized, which generates an interaction force with the permanent magnet 105 to drive the vibration of the vibrator part. The coil 205 is connected to a flexible printed circuit board F-PCB, 206 to facilitate electrical signal transmission and control.

[0062] F-PCB206:

[0063] The F-PCB 206 is electrically connected to the coil 205 to provide a driving circuit and signal transmission function. This design ensures the electrical control stability and ease of use of the linear motor.

[0064] Upper housing 207:

[0065] The upper shell 207 cooperates with the lower shell 201 to form a closed cavity, which protects the vibrator and the stator from the external environment, realizes the sealing of the inside of the device, and ensures the structural stability of the motor during vibration.

[0066] Preferably, the flat spring piece 101 in the present invention includes a spring piece body, which is a rectangular ring structure. Compared with the traditional spring piece design with complex shapes, the flat spring piece with a rectangular ring structure has a larger contact area, which is conducive to improving the reliability of welding. An opening 101a is provided in the middle of the spring piece body, and two opposite sides of the opening are respectively provided with welding areas 101b, which are used for welding with the convex and concave metal plate 102 or the lower shell support platform 202. By increasing the contact area, this design can effectively ensure the firmness of the welding, enhance the overall strength and stability of the vibration device, and ensure that the product is not prone to desoldering or loosening in the working state.

[0067] In order to further enhance the welding firmness of the spring piece, preferably, the welding area 101b adopts a folded flattening design. This design can not only increase the welding area, but also enhance the mechanical strength of the spring piece by increasing the thickness of the structure. In particular, the folding directions of two adjacent welding areas are opposite. This folded flattening structure can effectively reduce the stress concentration phenomenon of the spring piece during the welding process, avoid deformation of the spring piece due to uneven stress during welding, and further improve the long-term use reliability of the product. This design simplifies the production process, which not only ensures the assembly quality of the product, but also reduces the manufacturing cost.

[0068] Preferably, the convex-concave metal plate 102 is a rectangular planar structure, and a rectangular hole 102a is provided through the middle of the metal plate body, and the rectangular hole is used to position and fix the mass block 104. Through the design of the rectangular hole, the mass block can be firmly assembled and attached to the metal plate, ensuring the mass balance of the vibrator part, thereby ensuring that the vibration device can provide a uniform vibration effect when working. At the same time, the four corners of the metal plate body are provided with a rectangular convex structure 103. These convex structures are used to prevent the mass block from directly contacting the flat spring sheet when the device falls, thereby effectively preventing the spring sheet from plastic deformation due to external force impact. This design not only improves the impact resistance of the vibration device, but also extends the service life of the product, ensuring the stability of the device under various working conditions.

[0069] In order to further simplify the assembly process and improve the reliability of the product, preferably, a pair of opposite edges of the metal plate body 102 are provided with a chamfer design 102b. The purpose of the chamfer design is to reduce the end difference distance between the metal plate and the mass block, reduce the welding difficulty, and improve the accuracy and firmness of the welding operation, thereby further improving the stability and ease of operation of the vibration device during the welding process.

[0070] In order to simplify the manufacturing process, preferably, the core integrated structure 204 integrates the fixed structure with the core. This design eliminates the traditional dispensing assembly process, realizes the integrated installation of the core and the metal plate, simplifies the production process, and shortens the production cycle. While reducing the process steps, the core integrated structure also improves the structural rigidity of the entire stator part, ensuring that the vibration device can maintain stable performance output for a long time during operation. This design not only reduces production costs, but also improves production efficiency, and is suitable for large-scale industrial production.

[0071] Preferably, the lower shell 201 is a rectangular flat plate structure, and a boss through hole 203 of a rectangular frame structure is provided in the center of the main body, and the through hole is used to fix and position the iron core 204. Through this design, the iron core can be accurately positioned during the assembly process, which simplifies the assembly process, reduces the difficulty of installation, and ensures the assembly accuracy and stability of the device. In addition, support platforms 202 with strip-shaped protrusions are provided on both sides of the shell, and the support platforms are used to fix the flat spring pieces 101. Through this design, the welding operation area between the lower shell and the spring piece is increased, the process difficulty is reduced, the spring piece can be firmly connected to the shell, the suspension stability of the vibrator is ensured, and the overall structural strength and reliability of the vibration device are improved.

[0072] Through the above-mentioned preferred design, the Z-direction broadband vibration device of the present invention has been significantly optimized in structure and process. By introducing innovative designs such as flat spring pieces, convex and concave metal plates, and integrated core structures, not only the production process is simplified and the manufacturing cost is reduced, but also the impact resistance and long-term reliability of the product are improved. The various parts of the overall device are coordinated with each other. Through precise design and reasonable structural layout, it is ensured that the product can maintain stable vibration performance under various complex working conditions, and can be efficiently applied to a wide range of smart device application scenarios.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Z-direction broadband vibration device, characterized in that: include: A vibrator part, the vibrator part comprising: A flat spring sheet, which is a planar structure and increases the contact area with other components, and is welded to the convex and concave metal plate and the support platform of the lower shell respectively; The convex-concave metal plate has convex structures at its four corners, which are used to prevent the mass block from directly contacting the flat spring piece when falling; A mass block, welded and fixed to the convex-concave metal plate; A permanent magnet is fixed to one side of the mass block; An upper metal plate, arranged on the upper part of the permanent magnet, for fixing the permanent magnet; A stator part, the stator part comprising: The lower shell has support platforms on both sides and a boss through hole in the center; An integrated iron core structure is installed in the boss through hole of the lower shell; A coil, wound around the iron core; F-PCB, connected to the coil; The upper shell cooperates with the lower shell to form a closed cavity.

2. A Z-direction broadband vibration device according to claim 1, characterized in that: The flat spring piece includes a spring piece body, which is a rectangular ring structure. An opening is arranged in the middle of the spring piece body, and two opposite sides of the opening are respectively provided with welding areas for welding with a support platform or a convex-concave metal plate.

3. A Z-direction broadband vibration device according to claim 2, characterized in that: The welding area adopts a folding and flattening design, and the folding directions of two adjacent welding areas are opposite.

4. A Z-direction broadband vibration device according to claim 1, characterized in that: The convex-concave metal plate comprises a metal plate body which is a rectangular plane structure. A rectangular hole is provided through the middle of the metal plate body, and protrusions are provided in a rectangular parallelepiped shape at the four corners of the metal plate body.

5. A Z-direction broadband vibration device according to claim 4, characterized in that: A pair of opposite edges of the metal plate body are provided with a chamfer design to facilitate welding of the convex and concave metal plate and the mass block.

6. A Z-direction broadband vibration device according to claim 1, characterized in that: The iron core integrated structure integrates the fixed structure and the iron core, which simplifies the production process.

7. The Z-direction broadband vibration device according to claim 1, characterized in that: The iron core integrated structure has a coil wound around the outside, and an F-PCB is arranged at the bottom and is arranged in the boss through hole of the lower shell.

8. The Z-direction broadband vibration device according to claim 1, characterized in that: The lower shell includes a shell body, which is a rectangular flat plate structure. The boss through hole is located in the center of the shell body, which is a rectangular frame structure. Support platforms are arranged on both sides of the shell. The support platforms are strip-shaped raised structures, which are used to simplify the product structure, increase the welding operation area, and reduce the process difficulty.

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