Vibration exciter

Abstract

The present invention relates to a vibration exciter, which drives the vibration seat through a voice coil, transmits the vibration to the elastic frame, and then transmits the vibration to the support frame through a U-shaped vibration arm, and finally drives the laminated plate to vibrate. The main feature of this structure is that the rubber spring material of the previous similar product is replaced with an integrally formed elastic steel sheet. Since the spring sheet made of steel sheet material is more rigid than the spring sheet made of rubber material, only a smaller driving force is required to make the acceleration reach the required value. The mass block mounted on the vibration seat can make the resonant frequency of the product reach 180Hz, which is relatively sensitive to human touch, and the U-shaped vibration arm is connected between the elastic frame and the support frame, which effectively reduces the resonant frequency of the exciter and increases the amplitude of the exciter.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a vibration exciter. Background Art

[0002] In the prior art, the vibration exciter is a system mainly composed of a vibration generator, a control and measuring device and the necessary auxiliary equipment. It is a device that obtains mechanical vibration by utilizing electric, electro-hydraulic, piezoelectric or other principles. Its principle is to input the excitation signal into a coil placed in a magnetic field to drive the workbench connected to the coil.

[0003] In the patent document 201410837936.X, a tactile speaker and display assembly is provided with a bonding plate connected to a bracket that is bonded to a vibrating object, and a vibration system is provided on the bonding plate. A flexible frame that can vibrate is provided between the brackets, and a magnetic circuit system that cooperates with the vibration system is provided in the flexible frame. The structure of the tactile speaker is optimized to have a lower resonant frequency and a higher amplitude, which effectively increases the vibration sense of the speaker. The disadvantage is that the flexible frame is made of nylon 12 material. Due to the low structural stiffness and damping of nylon 12 material itself, it is easy to generate vibration with a large amplitude and difficult to attenuate. Long-term vibration will cause structural fatigue damage and shorten the life of the equipment. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a vibration exciter using a flexible frame made of steel sheet material. Due to the high rigidity of the steel sheet, a smaller driving force can be used to achieve the required acceleration value.

[0005] In order to achieve the above-mentioned purpose, the vibration exciter designed by the present invention mainly includes a bonding plate, and support frames integrated with the bonding plate are symmetrically arranged on both sides of the bonding plate, a clearance hole is opened in the middle position of the bonding plate, a boss is set on the outer edge of the clearance hole, and a voice coil is fixed on the outer side of the boss; an elastic frame that can vibrate is set between the support frames, a bayonet hole is opened in the middle of the elastic frame, a vibration seat is clamped in the bayonet hole, the interior of the vibration seat is hollow and matched with the main and auxiliary magnets, and an extension is set at the bottom of the vibration seat, a mass block is sleeved on the top surface of the extension, and the upper surface of the mass block is tightly matched with the bottom surface of the elastic frame. This structure sets support frames on both sides of the bonding plate, and fixes an elastic frame between the vibration seat and the support frame, so that the vibration is transmitted to the support frame through the elastic frame, driving the vibration of the support frame, and driving the vibration of the display screen through the support frame.

[0006] A further solution is that the elastic frame is provided with U-shaped vibration arms connected to the support frame around it, a steel sheet fixing position is provided in the middle of the upper surface of the support frame, and a card slot is provided at each end of the steel sheet fixing position, and the plane where the steel sheet fixing position is located is higher than the plane where the card slot is located; the U-shaped vibration arms provided at both ends of the support frame are connected by a connecting plate, and an elastic undercut extends downward from the connection between the connecting plate and the U-shaped vibration arm, and the elastic undercut is vertically arranged between the connecting plate, and the elastic undercut is inserted into the card slot, and the bottom of the side walls adjacent to the elastic undercut at both ends of the support frame are provided with a space to avoid the elastic undercut, and a positioning hole is provided in the middle of the connecting plate, and the inner side of the positioning hole is engaged with the steel sheet fixing position. This structure connects the elastic frame to the support frame through the U-shaped vibration arm, the elastic undercut provided on the U-shaped vibration arm is inserted into the card slot on the upper surface of the support frame, and a connecting plate is provided between the U-shaped vibration arms on one side of the support frame, thereby reducing the resonant frequency of the exciter, increasing the amplitude of the exciter, and enhancing the connection strength between the U-shaped vibration arm and the support frame.

[0007] A further solution is to provide a plurality of bent portions around the inner edge of the bayonet hole in the middle of the elastic frame, and the inner walls of the bent portions are fixedly engaged with the outer wall of the vibration seat. This structure uses the bent portions provided in the elastic frame to set the vibration seat inside the bayonet hole in the elastic frame.

[0008] A further solution is to provide an open slot around the elastic frame at the connection with the U-shaped vibration arm. This structure provides an open slot around the elastic frame to avoid the U-shaped vibration arm, thereby preventing collision between the U-shaped vibration arm and the elastic frame.

[0009] A further solution is that the elastic undercut in the U-shaped vibration arm is glued to the outer wall of the support frame. This structural setting further adheres and fixes the U-shaped vibration arm to the outer wall of the support frame.

[0010] A further solution is to provide a buffer pad between the bottom surface of the connecting plate and the top surface of the support frame. The buffer pad is provided between the connecting plate and the support frame, and a slot is provided in the middle of the buffer pad that matches the shape of the steel sheet fixing position. This structural arrangement provides a buffer pad between the connecting plate and the support frame to prevent collision between the U-shaped vibration arm and the support frame.

[0011] A further solution is to use four U-shaped vibration arms, with the elastic frame, four U-shaped vibration arms, and connecting plate formed from a single piece of elastic steel. This structural configuration replaces the elastic frame with elastic steel, thereby reducing the loss of mechanical kinetic energy during vibration transmission.

[0012] The vibration exciter designed in the present invention drives the vibration seat through the voice coil, transmits the vibration to the elastic frame, and then transmits the vibration to the support frame through the U-shaped vibration arm, finally driving the laminated plate to vibrate. The main feature of this structure is that the rubber spring material of previous products of the same type is replaced with an integrally formed elastic steel sheet. Since the spring sheet made of steel sheet material is more rigid than the spring sheet made of rubber material, only a smaller driving force is required to make the acceleration reach the required value. The mass block mounted on the vibration seat can make the resonant frequency of the product reach 180Hz, which is relatively sensitive to human touch. The U-shaped vibration arm is connected between the elastic frame and the support frame, which effectively reduces the resonant frequency of the exciter and increases the amplitude of the exciter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric view of the vibration exciter.

[0014] Figure 2 is a cross-sectional view of the vibration exciter.

[0015] Figure 3 is a front view of the vibration exciter. DETAILED DESCRIPTION

[0016] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0017] Example 1.

[0018] like Figure 1 and Figure 3 As shown, the vibration exciter described in this embodiment has a clearance hole in the middle of the bonding plate 1, a boss 3 is provided on the outer edge of the clearance hole, and a voice coil 5 is fixed on the outer side of the boss 3; an elastic frame 8 that can vibrate is provided between the support frames 2, a bayonet hole is provided in the middle of the elastic frame 8, a bending portion 14 is provided on the inner edge of the bayonet hole, and the bending portion 14 is fixed to the vibration seat 4 by laser welding, the interior of the vibration seat 4 is hollow and is equipped with main and auxiliary magnets, and an extension portion 6 is provided at the bottom of the vibration seat 4, and the top surface of the extension portion 6 is welded with a mass block 7.

[0019] like Figure 1 、 Figure 2 and Figure 3As shown, support frames 2 are symmetrically arranged on both sides of the bonding plate 1, and the support frames 2 are connected to the U-shaped vibration arms 9 arranged around the elastic frame 8. Open grooves 15 are provided at the connections between the elastic frame 8 and the U-shaped vibration arms 9. A steel sheet fixing position 10 is provided in the middle of the upper surface of the support frame 2, and a card slot 11 is provided at both ends of the upper surface of the support frame 2. The plane where the steel sheet fixing position 10 is located is higher than the plane where the card slot 11 is located; the U-shaped vibration arms 9 arranged at both ends of the support frame 2 are connected by a connecting plate 13, and an elastic undercut 12 is provided at the connection between the connecting plate 13 and the U-shaped vibration arm 9. The elastic undercut 12 is vertically arranged between the elastic undercut 12 and the connecting plate 13. The elastic undercut 12 is plugged into the card slot 11, and a space is provided at the bottom of the side walls adjacent to the elastic undercut 12 at both ends of the support frame 2 to avoid the elastic undercut 12. A positioning hole is provided in the middle of the connecting plate 13, and the inner side of the positioning hole is engaged with the steel sheet fixing position 10.

[0020] A buffer pad 16 is provided between the bottom surface of the connecting plate 13 and the top surface of the supporting frame 2 . The buffer pad 16 is provided between the connecting plate 13 and the supporting frame 2 . A slot matching the shape of the steel sheet fixing position 10 is provided in the middle of the buffer pad 16 .

[0021] There are four U-shaped vibration arms 9 in total, and they are elastic steel sheets integrally formed with the elastic frame 8 and the connecting plate 13 .

[0022] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A vibration exciter, mainly comprising a laminated plate (1), characterized in that The bonding plate (1) is symmetrically provided with support frames (2) integrated with the bonding plate (1) on both sides, a clearance hole is provided in the middle of the bonding plate (1), a boss (3) is provided on the outer edge of the clearance hole, and a voice coil (5) is fixed on the outer side of the boss (3); an elastic frame (8) capable of vibrating is provided between the support frames (2), a bayonet hole is provided in the middle of the elastic frame (8), a vibration seat (4) is provided in the bayonet hole, the interior of the vibration seat (4) is hollow and is provided with a main and auxiliary magnet, and an extension (6) is provided at the bottom of the vibration seat (4), a mass block (7) is sleeved on the top surface of the extension (6), and the upper surface of the mass block (7) is tightly matched with the bottom surface of the elastic frame (8); the setting of this structure is achieved by providing support frames on both sides of the bonding plate and fixing the elastic frame between the vibration seat and the support frame, so that the vibration is transmitted to the support frame through the elastic frame, and the display screen is driven to vibrate via the support frame; The elastic frame (8) is provided with U-shaped vibration arms (9) connected to the support frame (2) around it, and a steel sheet fixing position (10) is provided in the middle of the upper surface of the support frame (2), and a card slot (11) is provided at both ends of the steel sheet fixing position (10), and the plane where the steel sheet fixing position (10) is located is higher than the plane where the card slot (11) is located; the U-shaped vibration arms (9) provided at both ends of the support frame (2) are connected through a connecting plate (13), and an elastic buckle (12) extends downward from the connection between the connecting plate (13) and the U-shaped vibration arm (9), and the elastic buckle (12) and the connecting plate (13) are vertically arranged, and the elastic buckle (12) is plugged into the card slot (11), and a space for avoiding the elastic buckle (12) is provided at the bottom of the side wall adjacent to the elastic buckle (12) at both ends of the support frame (2), and a positioning hole is provided in the middle of the connecting plate (13), and the inner side of the positioning hole is engaged with the steel sheet fixing position (10); The elastic frame (8), the four U-shaped vibration arms (9) and the connecting plate (13) are elastic steel sheets formed in one piece.

2. The vibration exciter according to claim 1, characterized in that A plurality of bending portions (14) are provided around the inner edge of the bayonet hole in the middle of the elastic frame (8), and the inner wall of the bending portion (14) is fixedly matched with the outer wall of the vibration seat (4).

3. The vibration exciter according to claim 1 or 2, characterized in that Open slots (15) are provided around the elastic frame (8) at the connection with the U-shaped vibration arm (9).

4. The vibration exciter according to claim 1 or 2, characterized in that The elastic undercut (12) in the U-shaped vibration arm (9) is adhered to the outer wall of the support frame (2) by glue.

5. The vibration exciter according to claim 3, characterized in that The elastic undercut (12) in the U-shaped vibration arm (9) is adhered to the outer wall of the support frame (2) by glue.

6. The vibration exciter according to claim 1 or 2, characterized in that A buffer pad (16) is provided between the bottom surface of the connecting plate (13) and the top surface of the support frame (2). The buffer pad (16) is provided between the connecting plate (13) and the support frame (2). A slot matching the shape of the steel sheet fixing position (10) is provided in the middle of the buffer pad (16).

7. The vibration exciter according to claim 3, characterized in that A buffer pad (16) is provided between the bottom surface of the connecting plate (13) and the top surface of the support frame (2). The buffer pad (16) is provided between the connecting plate (13) and the support frame (2). A slot matching the shape of the steel sheet fixing position (10) is provided in the middle of the buffer pad (16).

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