Elastic support and exciter

Abstract

The present application relates to the technical field of exciter, especially relates to a elastic support and exciter, comprising: metal elastic sheet framework, the metal elastic sheet framework is sheet structure, and the shape corresponds to the shape of the elastic support; thermoplastic support, the thermoplastic support is set to the metal elastic sheet framework outside, and the metal elastic sheet framework is covered;Wherein, the thermoplastic support and the metal elastic sheet framework are integrally formed by injection molding, and the metal elastic sheet framework at least partially protrudes from the thermoplastic support, for fixedly connected with the stator assembly.In the present application, the elastic support has rigid characteristics, is not easy to age deformation after long-term use, and can well maintain its original performance;It also has the damping characteristics of traditional nylon support, can quickly stop vibrating after disconnecting the electric signal, so that the exciter responds quickly, changes the original problem of poor combination between nylon and metal, and can also keep the combination between the elastic support and the stator assembly from deforming and falling off after long-term use, thereby increasing the service life.

Description

Technical Field

[0001] This invention relates to the field of exciter technology, and more particularly to an elastic support and an exciter. Background Technology

[0002] Traditional linear exciters all contain a core component—the elastic support. The elastic support connects the stator assembly and the oscillator assembly in the exciter. During the operation of the exciter, it plays the role of providing elastic restoring force and support to the oscillator assembly, enabling the oscillator assembly to perform reciprocating motion under the drive of alternating current, thereby transmitting vibration to the outside world.

[0003] Existing technologies utilize a variety of shapes and materials for elastic supports, with stainless steel and nylon being the most commonly used. Stainless steel elastic supports exhibit poor instantaneous response, while nylon elastic supports offer greater material damping, resulting in better transient response and rapid cessation of vibration upon disconnection of the electrical signal, leading to a quick exciter response. However, nylon springs are prone to aging and deformation, causing the product to lose its original performance. Furthermore, nylon elastic supports are difficult to integrate with metal stator assemblies during subsequent exciter assembly. Even when forcibly integrated, exciter vibration and material aging can easily cause deformation and detachment, rendering the exciter inoperable.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides an elastic support and an exciter, thereby effectively solving the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: an elastic support, comprising:

[0007] A metal spring frame, wherein the metal spring frame is a thin sheet structure and its shape corresponds to the shape of the elastic support;

[0008] A thermoplastic bracket is disposed outside the metal spring frame and covers the metal spring frame;

[0009] The thermoplastic bracket and the metal spring frame are integrally injection molded, and the metal spring frame protrudes at least partially from the thermoplastic bracket for fixed connection with the stator assembly.

[0010] Furthermore, the metal spring frame includes:

[0011] The annular portion, the thermoplastic bracket covering the annular portion, is used for connection with the oscillator assembly;

[0012] A connecting portion, located at opposite ends of the annular portion, at least partially protruding from the thermoplastic bracket, and fixedly connected to the stator assembly;

[0013] A plurality of cantilever arms connect the annular portion and the connecting portion.

[0014] Furthermore, the annular portion and the plurality of cantilever arms are located on the same plane.

[0015] Furthermore, some of the cantilever arms have a meandering structure and meander between the annular portion and the connecting portion.

[0016] Furthermore, the annular portion is provided with two positioning support structures at both ends near the two connecting portions. The two positioning support structures protrude from the thermoplastic bracket and provide positioning support for the metal spring frame during injection molding.

[0017] Furthermore, the connecting portion includes a first fixing end and a second fixing end protruding from the thermoplastic bracket. The first fixing end is located at the ends of the two connecting portions that are far apart from each other, and the second fixing end is located at the ends of the two connecting portions that are close to each other.

[0018] Furthermore, the first fixed end extends to one end perpendicular to the plane, and the second fixed end is located on the plane.

[0019] Furthermore, the first fixed end and the second fixed end are fixedly connected to the stator assembly by welding.

[0020] Furthermore, the thickness of the thermoplastic support at the cantilever is less than the thickness of the support at the annular portion and the connecting portion.

[0021] The present invention also includes an exciter, comprising:

[0022] Oscillator assembly and stator assembly;

[0023] The oscillator assembly includes an elastic support as described in any one of claims 1 to 9 and a magnetic cup fixedly connected to the elastic support, and a magnet, pole piece and coil assembly disposed between the magnetic cup and the elastic support;

[0024] The magnetic bowl and the elastic support are integrally injection molded.

[0025] The stator assembly includes a base plate, on which a plurality of baffles are provided. The baffles limit the elastic support, and the metal spring frame is at least partially fixedly connected to the baffles.

[0026] The beneficial effects of this invention are as follows: In this invention, a metal spring frame is set inside the thermoplastic support. The thermoplastic support is responsible for the external structure of the elastic support, and the metal spring frame is responsible for controlling the vibration frequency of the exciter. By injection molding the thermoplastic support integrally to encapsulate the metal spring frame, the elastic support has rigidity characteristics. After long-term use, it is not easy to age and deform, and can maintain its original performance well. It also has the damping characteristics of traditional nylon supports, and can quickly stop vibration after the electrical signal is disconnected, so that the exciter responds quickly. Furthermore, the upper part of the metal spring frame protrudes from the thermoplastic support to combine with the metal stator assembly, which changes the problem of poor compatibility between nylon and metal. After long-term use, the combination between the elastic support and the stator assembly can also be maintained without deformation or detachment, thus increasing the service life. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the elastic support;

[0029] Figure 2 A schematic diagram of the structure of a metal shrapnel frame;

[0030] Figure 3 This is a cross-sectional view of the elastic support;

[0031] Figure 4 This is a schematic diagram of the actuator's structure;

[0032] Figure 5 for Figure 4 Exploded view;

[0033] Figure 6 This is a schematic diagram of the structure of the elastic support and the magnetic bowl;

[0034] Figure 7 This is a schematic diagram of the substrate structure. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] like Figures 1 to 3 As shown: A flexible support, comprising:

[0039] Metal spring frame 11, the metal spring frame 11 is a thin sheet structure and its shape corresponds to the shape of the elastic support 1;

[0040] Thermoplastic bracket 12 is disposed outside the metal spring frame 11 and covers the metal spring frame 11;

[0041] The thermoplastic bracket 12 and the metal spring frame 11 are integrally injection molded. The metal spring frame 11 protrudes at least partially from the thermoplastic bracket 12 and is used to fix and connect with the stator assembly 3.

[0042] By setting a metal spring frame 11 inside the thermoplastic bracket 12, the thermoplastic bracket 12 is responsible for the external structure of the elastic bracket 1, and the metal spring frame 11 is responsible for controlling the vibration frequency of the exciter. The thermoplastic bracket 12 is integrally molded outside the metal spring frame 11 by injection molding, thus wrapping the metal spring frame 11, so that the elastic bracket 1 has rigidity characteristics. After long-term use, it is not easy to age and deform, and can maintain its original performance well. It also has the damping characteristics of traditional nylon brackets, which can quickly stop vibration after the electrical signal is disconnected, so that the exciter responds quickly. The upper part of the metal spring frame 11 protrudes from the thermoplastic bracket 12 to combine with the metal stator assembly 3, which changes the problem of poor bonding between nylon and metal. After long-term use, the combination between the elastic bracket 1 and the stator assembly 3 can be maintained without deformation or detachment, thus increasing the service life.

[0043] Because the metal spring frame 11 increases the overall stiffness of the elastic support 1, in the modal analysis of the exciter, the first-order vertical motion mode frequency and the second-order torsional mode frequency are separated, so that the two do not interfere with each other, thus the exciter can vibrate vertically only at the first-order mode frequency.

[0044] The metal spring frame 11 can be made of stainless steel, copper alloy, titanium alloy, magnesium alloy, etc., and the thermoplastic bracket 12 can be made of nylon PA, polypropylene PP, polyvinyl chloride PVC, polycarbonate PC, acrylonitrile / butadiene / styrene copolymer ABS, etc.

[0045] like Figures 2 to 3 As shown, in this embodiment, the metal spring frame 11 includes:

[0046] The annular portion 111, and the thermoplastic bracket 12 covering the annular portion 111, are used to connect with the oscillator assembly 2;

[0047] The connecting portion 112 is located at opposite ends of the annular portion 111. The connecting portion 112 protrudes at least partially from the thermoplastic bracket 12 and is fixedly connected to the stator assembly 3.

[0048] Several cantilever arms 113 connect the annular portion 111 and the connecting portion 112.

[0049] By setting the annular part 111, the connecting part 112 and the cantilever 113, the rigidity of the cantilever 113 of the elastic bracket 1 is mainly improved, thereby ensuring that the elastic bracket 1 is not prone to deformation and aging problems after long-term use.

[0050] The annular portion 111 and several cantilever 113 are located on the same plane. The several cantilever 113 have a meandering structure and meander between the annular portion 111 and the connecting portion 112.

[0051] By setting the cantilever 113 as a meandering structure, the length of the lever arm can be increased within a limited space, which can effectively reduce the first mode frequency of the exciter, thereby separating the first mode frequency from the second mode frequency. The meandering structure of the cantilever 113 can be set as "S-shaped", "C-shaped", etc.

[0052] As a preferred embodiment, the annular portion 111 is provided with two positioning support structures 1111 at both ends near the two connecting portions 112. The two positioning support structures 1111 protrude from the thermoplastic bracket 12 and provide positioning support for the metal spring frame 11 during injection molding.

[0053] like Figure 3 As shown, Figure 3The mid-section line is a metal spring frame 11, and the rest is a thermoplastic bracket 12. In this embodiment, the connecting part 112 includes a first fixing end 1121 and a second fixing end 1122 protruding from the thermoplastic bracket 12. The first fixing end 1121 is located at the ends of the two connecting parts 112 that are far apart from each other, and the second fixing end 1122 is located at the ends of the two connecting parts 112 that are close to each other.

[0054] The existing stator assembly 3 has a number of stops on the base plate 31 to connect with the elastic bracket 1. For example, vertical stops 311 are provided at both ends of the connecting part 112. In the original nylon elastic bracket 1, a buckle structure is usually provided on these vertical stops 311 on the base plate 31 and on the elastic bracket 1 to achieve fixation. However, after long-term use, the buckles may fail or come off, making it unusable. Therefore, the first fixing end 1121 and the second fixing end 1122 of the thermoplastic bracket 12 are provided respectively. The first fixing end 1121 is located at the ends of the two connecting parts 112 that are far apart from each other, and the second fixing end 1122 is located at the ends of the two connecting parts 112 that are close to each other, so as to eliminate the need for the buckle structure.

[0055] The first fixed end 1121 extends to one end perpendicular to the plane, and the second fixed end 1122 is located on the plane. The first fixed end 1121 and the second fixed end 1122 are fixedly connected to the stator assembly 3 by welding.

[0056] By welding the first fixed end 1121 and the second fixed end 1122 to the substrate 31 on the stator assembly 3, the connection effect is ensured. The welding can be performed by laser spot welding. The first fixed end 1121 is set to extend to one end perpendicular to the plane, and the second fixed end 1122 is located in the plane to facilitate welding with the substrate 31.

[0057] As a preferred embodiment of the above, the covering thickness of the thermoplastic bracket 12 at the cantilever 113 is less than the covering thickness at the annular portion 111 and the connecting portion 112.

[0058] Because the thermoplastic bracket 12 needs to maintain the shape of the elastic bracket 1, it needs to be relatively thick at the annular part 111 and the connecting part 112. The meandering cantilever 113 can reduce the stiffness of the bracket in a limited space and reduce the stress concentration phenomenon of the bracket during vibration, but it can also easily cause torsional vibration of the bracket. Torsional vibration is not the ideal mode shape of a linear exciter. Torsional vibration often has a small vibration sensation and is prone to causing collisions between the oscillator and the voice coil during movement. Therefore, it is necessary to separate the frequency corresponding to the torsional mode shape from the ideal upper and lower vibration mode shape frequency, and remove it from the range of the exciter's working frequency to reduce the impact of torsional motion on the exciter's operation. Therefore, the cantilever 113 needs to have a certain rigidity, so it needs to be relatively thin. This can be achieved by covering the metal spring frame 11 at this location to separate the first-order mode shape frequency from the second-order mode shape frequency.

[0059] like Figures 4 to 7 As shown, this embodiment also includes an exciter, comprising:

[0060] Oscillator assembly 2 and stator assembly 3;

[0061] The oscillator assembly 2 includes an elastic support 1 and a magnetic cup 21 fixedly connected to the elastic support 1, a magnet 22, a pole piece 23 and a coil assembly 32 disposed between the magnetic cup 21 and the elastic support 1;

[0062] like Figure 6 As shown, the magnetic bowl 21 and the elastic support 1 are integrally injection molded;

[0063] The stator assembly 3 includes a base plate 31, on which a plurality of baffles 311 are provided. The baffles 311 limit the elastic support 1, and the metal spring frame 11 is at least partially fixedly connected to the baffles 311.

[0064] Since the magnetic cup 21 between the elastic support 1 and the oscillator assembly 2 needs to be fixed, the metal spring frame 11, the magnetic cup 21 and the thermoplastic support 12 can be directly injection molded as a whole to ensure the connection between the magnetic cup 21 and the elastic support 1. The other magnets 22, magnetic cup 21 and pole pieces 23 are glued together and assembled into the magnetic cup 21. Then the stator assembly 3 is welded to the elastic support 1 to make it an exciter.

[0065] like Figure 7 As shown, the stator assembly 3 includes a base plate 31, wherein a retaining edge 311 is provided on the base plate 31 corresponding to the metal elastic frame. The retaining edge 311 is fixed by welding to the first fixed end 1121 and the second fixed end 1122. The thermoplastic bracket 12 can also be glued to the contact point with the base plate 31 for auxiliary fixation.

[0066] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An exciter, characterized in that, include: Oscillator assembly and stator assembly; The oscillator assembly includes an elastic support and a magnetic cup fixedly connected to the elastic support, and a magnet and a pole piece disposed between the magnetic cup and the elastic support; The magnetic bowl and the elastic support are integrally injection molded. The elastic support includes: A metal spring frame, wherein the metal spring frame is a thin sheet structure and its shape corresponds to the shape of the elastic support; A thermoplastic bracket is disposed outside the metal spring frame and covers the metal spring frame; The thermoplastic bracket and the metal spring frame are integrally injection molded, and the metal spring frame protrudes at least partially from the thermoplastic bracket for fixed connection with the stator assembly. The stator assembly includes a base plate and a coil assembly fixed to the base plate. The base plate is provided with a plurality of baffles, which limit the elastic support. The metal spring frame is at least partially fixedly connected to the baffles.

2. The exciter according to claim 1, characterized in that, The metal spring frame includes: The annular portion, the thermoplastic bracket covering the annular portion, is used for connection with the oscillator assembly; A connecting portion, located at opposite ends of the annular portion, at least partially protruding from the thermoplastic bracket, and fixedly connected to the stator assembly; A plurality of cantilever arms connect the annular portion and the connecting portion.

3. The exciter according to claim 2, characterized in that, The annular portion and several of the cantilever arms are located on the same plane.

4. The exciter according to claim 2, characterized in that, Some of the cantilever arms have a meandering structure and meander between the annular portion and the connecting portion.

5. The exciter according to claim 2, characterized in that, The annular portion has two positioning support structures at both ends near the two connecting portions. The two positioning support structures protrude from the thermoplastic bracket and provide positioning support for the metal spring frame during injection molding.

6. The exciter according to claim 3, characterized in that, The connecting portion includes a first fixed end and a second fixed end protruding from the thermoplastic bracket. The first fixed end is located at the ends of the two connecting portions that are far apart from each other, and the second fixed end is located at the ends of the two connecting portions that are close to each other.

7. The exciter according to claim 6, characterized in that, The first fixed end extends to one end perpendicular to the plane, and the second fixed end is located on the plane.

8. The exciter according to claim 7, characterized in that, The first fixed end and the second fixed end are fixedly connected to the stator assembly by welding.

9. The exciter according to claim 3, characterized in that, The thickness of the thermoplastic support at the cantilever is less than the thickness of the support at the annular portion and the connecting portion.

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