Vibration motor

Abstract

The invention, which relates to the technical field of the motor, discloses a vibration motor comprising a vibration assembly and an elastic sheet. The elastic sheet comprises a central sheet and at least two connecting sheets connected with the central sheet, the two connecting sheets are bonded on the vibration assembly, one side of each connecting sheet is provided with an avoiding hole, and the avoiding hole is located at one side, adjacent to the central sheet, of the connecting sheet. According to the technical scheme provided by the invention, the adhesive layer of the vibration motor is prevented from cracking.

Description

Technical Field

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

[0002] In automotive projects, vibration motors are a key actuator, and their performance stability is crucial to the reliability of the entire system. However, vibration motors in the prior art show obvious instability in high temperature and high humidity environments. Specifically, when vibration motors are exposed to high temperature and high humidity conditions, their adhesive layer will crack and fail. This failure is not obvious under high temperature conditions, but once the ambient humidity increases, the problem of adhesive layer cracking increases significantly, resulting in a sharp increase in the failure rate. Summary of the invention

[0003] The main purpose of the present invention is to provide a vibration motor, aiming to avoid cracking of the glue layer of the vibration motor.

[0004] To achieve the above object, the present invention provides a vibration motor, which comprises:

[0005] Vibration components; and

[0006] The spring piece includes a central piece and at least two connecting pieces, one end of each connecting piece is connected to the central piece, and the other end of each connecting piece is bonded to the vibration component; and one side of each connecting piece located between the central piece and the vibration component is a waist side, and an avoidance hole is provided on the waist side, and the avoidance hole is an arc-shaped hole.

[0007] In one embodiment, each of the connecting pieces has two waist sides, and each waist side is provided with an avoidance hole.

[0008] In one embodiment, the avoidance hole is disposed near an end of the connecting piece away from the central piece.

[0009] In one embodiment, the avoidance hole is a streamline avoidance hole or a hyperbolic avoidance hole.

[0010] In one embodiment, the width of the avoidance hole is gradually increased from a side close to the central piece to a side away from the central piece.

[0011] In one embodiment, the avoidance hole and the connection portion of the connecting piece away from the central piece are connected in an arc transition.

[0012] In one embodiment, the connecting piece comprises:

[0013] A connecting portion, one end of which is connected to the central sheet; one side of the connecting portion is provided with the avoidance hole; and

[0014] The terminal portion is connected to an end of the connecting portion away from the central piece, the terminal portion is bonded to the vibration component, and the thickness of the terminal portion is greater than the thickness of the connecting portion.

[0015] In one embodiment, the terminal portion is provided with a plurality of countersunk holes, and the plurality of countersunk holes are located on a side of the terminal portion facing the vibration component.

[0016] In one embodiment, the connecting portion is a trapezoidal sheet member.

[0017] In one embodiment, the elastic piece includes four connecting pieces connected to the central piece, and the four connecting pieces are arranged at intervals around the periphery of the central piece.

[0018] The vibration motor of the technical solution of the present invention includes a vibration component and a spring piece; the spring piece includes a center piece and at least two connecting pieces, one end of each connecting piece is connected to the center piece, and the other end of each connecting piece is bonded to the vibration component; and the side of each connecting piece located between the center piece and the vibration component is the waist side, and the waist side is provided with an avoidance hole, and the avoidance hole is an arc-shaped hole. The vibration motor significantly reduces the stress amplitude at the connection between the connecting piece of the spring piece and the vibration component through the setting of the arc-shaped avoidance hole, and the optimized structure is significantly improved in the maximum stress distribution, and the maximum stress is no longer concentrated at the edge of the end, but is dispersed in the entire structure. This design of dispersing stress not only improves the durability of the vibration motor, but also enhances its performance stability in harsh environments, further reduces the stress concentration between the connecting piece and the vibration component, and provides additional protection for the glue layer, so that the problem of cracking of the glue layer of the vibration motor under high temperature and high humidity conditions is effectively avoided, ensuring the long-term stable operation of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the vibration motor provided by the present invention after the vibration component and the spring are assembled.

[0021] Description of Figure Numbers:

[0022] 10. Vibration assembly; 20. Shrapnel; 21. Center piece; 22. Connecting piece; 22a. Avoidance hole; 221. Connecting part; 222. End part; 222a. Countersunk hole.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments 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.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The invention provides a vibration motor.

[0028] See also Figure 1 In one embodiment of the present invention, the vibration motor includes a vibration component 10 and a spring piece 20; the spring piece 20 includes a central piece 21 and at least two connecting pieces 22, one end of each connecting piece 22 is connected to the central piece 21, and the other end of each connecting piece 22 is bonded to the vibration component 10; and one side of each connecting piece located between the central piece and the vibration component is a waist side, and an avoidance hole 22a is provided on the waist side, and the avoidance hole 22a is an arc-shaped hole.

[0029] In an embodiment of the present invention, we propose a high-reliability vibration motor design, which can effectively avoid the problem of cracking of the adhesive layer of the vibration motor in a high temperature and high humidity environment. The vibration component 10 is the core part of the vibration motor, which is responsible for converting electrical energy into mechanical vibration. It is usually composed of one or more vibrators, which vibrate under the action of an electric field. In the present invention, the design of the vibration component 10 takes into account the stability in a high temperature and high humidity environment to ensure that the performance can be maintained even under harsh conditions.

[0030] The spring piece 20 is a key component that connects the vibration component 10 with the external structure, and it includes a center piece 21 and at least two connecting pieces 22. The center piece 21 is the core of the spring piece 20, one end of the connecting piece 22 extends from the center piece 21, and the other end of the connecting piece 22 is bonded to the vibration component 10. This design enables the spring piece 20 to flexibly transmit vibration force while maintaining the stability of the structure. The connecting pieces 22 are part of the spring piece 20, which are connected to the center piece 21 and bonded to the vibration component 10. An arc-shaped avoidance hole 22a is provided on the waist side of each connecting piece 22. The design of these avoidance holes 22a helps to reduce the stress concentration between the connecting piece 22 and the vibration component 10, thereby reducing the risk of cracking of the adhesive layer.

[0031] The avoidance holes 22a are located between the center piece and the vibration assembly. They exist to provide a buffer area between the connecting piece 22 and the vibration assembly 10 to reduce the stress concentration caused by vibration. This design helps to disperse the stress and prevent the adhesive layer from cracking at the connection due to excessive stress.

[0032] In the working process of the vibration motor, the cooperation between the spring piece 20 and the connecting piece 22 is very important. When the vibration component 10 vibrates under the action of the electric field, the spring piece 20 transmits the vibration force to the vibration component 10 through the connecting piece 22. The design of the arc-shaped avoidance hole 22a enables the connecting piece 22 to better adapt to the vibration during the force transmission process, reducing the damage to the adhesive layer caused by stress concentration.

[0033] The vibration motor of the present invention significantly reduces the stress amplitude at the connection between the connecting piece 22 of the spring 20 and the vibration component 10 by setting the arc-shaped avoidance hole 22a. The optimized structure has been significantly improved in the maximum stress distribution. The maximum stress is no longer concentrated at the edge of the end, but is dispersed throughout the structure. This design of dispersing stress not only improves the durability of the vibration motor, but also enhances its performance stability in harsh environments, further reduces the stress concentration between the connecting piece 22 and the vibration component 10, and provides additional protection for the glue layer, thereby effectively avoiding the problem of cracking of the glue layer of the vibration motor under high temperature and high humidity conditions, ensuring the long-term stable operation of the product.

[0034] In one embodiment, see Figure 1 Each connecting piece 22 has two waist sides, and each waist side is provided with an avoidance hole 22a.

[0035] The connecting pieces 22 are part of the spring pieces 20, which extend from the center piece 21 and are bonded to the vibration assembly 10. The main function of the connecting pieces 22 is to transfer the vibration force generated by the vibration assembly 10 to the spring pieces 20, thereby driving the entire vibration system. The avoidance holes 22a are specific structures designed on both sides of the connecting pieces 22, and they are located at the position where the connecting pieces 22 are adjacent to the center piece 21. The main function of the avoidance holes 22a is to reduce the contact area between the connecting pieces 22 and the vibration assembly 10, thereby reducing stress concentration and preventing the adhesive layer from cracking due to excessive stress.

[0036] During the operation of the vibration motor, the vibration component 10 generates vibrations under the action of the electric field. These vibrations are transmitted to the center piece 21 of the spring 20 through the connecting piece 22, and then transmitted to other parts by the center piece 21. The design of the avoidance hole 22a allows the connecting piece 22 to have a certain flexibility in the process of transmitting force, reducing the direct contact between the connecting piece 22 and the vibration component 10, thereby reducing stress concentration. This design allows the connecting piece 22 to disperse stress more evenly when subjected to vibration force, avoiding cracking of the adhesive layer due to excessive local stress.

[0037] By providing avoidance holes 22a on both waist sides of each connecting piece 22, under high temperature and high humidity conditions, water molecules in the air can easily infiltrate the adhesive layer and reduce the interfacial bonding strength. The design of the avoidance holes 22a further reduces the contact area, thereby reducing the impact of water molecules on the adhesive layer and improving the durability of the adhesive layer.

[0038] In one embodiment, see Figure 1 The avoidance hole 22 a is arranged near an end of the connecting piece 22 away from the central piece 21 .

[0039] In the design of the vibration motor, the avoidance hole 22a is arranged near the end of the connecting piece 22 away from the center piece 21. From the positional relationship, the connecting piece 22 plays a bridge role in the vibration motor, connecting different functional components, one end is close to the center piece 21 to cooperate with it, and the other end is responsible for transmitting vibration or force to the outside. The avoidance hole 22a is arranged at the end of the connecting piece 22 away from the center piece 21, and this layout is not random.

[0040] When the vibration motor is working, in a harsh environment of high temperature and high humidity, the existing vibration motor is prone to cracking and failure of the glue layer. This is because the high-humidity water molecules in the air will infiltrate the interface between the glue layer and the ceramic and steel sheets, and the water molecules will act as a lubricant, resulting in a decrease in the interfacial bonding strength. At the same time, there are two types of deformation drives at the end of the vibration component 10. After long-term vibration accumulation, the interface is prone to cracking. After the avoidance hole 22a is set in this way, it is set at a specific position of the connecting piece 22, which changes the local structure and stiffness distribution of the connecting piece 22. During the operation of the vibration motor, the existence of the avoidance hole 22a allows the stress at the end of the connecting piece 22 away from the center piece 21 to be dispersed, reducing the stress concentration here. When the force generated by the vibration is transmitted to this end of the connecting piece 22, the avoidance hole 22a plays a buffering and regulating role, making the force distribution more uniform and not forming excessive stress locally. In this way, the risk of cracking of the glue layer due to excessive stress can be effectively reduced. At the same time, this structural optimization can also indirectly affect the stress state of the vibration component 10, reduce the damage to the adhesive layer caused by excessive end stress, and thus significantly improve the reliability of the vibration motor in a high temperature and high humidity environment, avoiding the occurrence of adhesive layer cracking and failure problems.

[0041] In one embodiment, see Figure 1 The avoidance hole 22a is a streamline avoidance hole 22a or a hyperbolic avoidance hole 22a.

[0042] When the avoidance hole 22a is a streamline avoidance hole 22a or a hyperbolic avoidance hole 22a, and is arranged near the end of the connecting piece 22 away from the center piece 21, a significant technical effect can be produced. During the operation of the vibration motor, the high temperature and high humidity environment will cause the glue layer to crack. The root cause is that water molecules infiltrate the interface between the glue layer and the vibration component 10 and the spring 20, reducing the interface bonding strength. At the same time, the force generated by the deformation drive of the end of the vibration component 10 accumulates for a long time, and the high stress level caused by the design of the root of the spring 20 without avoiding air.

[0043] After adopting the streamlined or hyperbolic avoidance hole 22a design, a unique structure is formed at a specific position of the connecting piece 22. The streamlined avoidance hole 22a, with its smooth lines, can smoothly disperse the stress generated during the vibration transmission along its shape, avoiding excessive concentration of stress at the end of the connecting piece 22; the hyperbolic avoidance hole 22a uses its complex curved surface structure to decompose and buffer the force from multiple directions. Both can effectively adjust the stress distribution at the end of the connecting piece 22, allowing the stress to be more evenly dispersed, and reducing the damage to the adhesive layer caused by excessive stress. In this way, in a high temperature and high humidity environment, the possibility of cracking of the adhesive layer is greatly reduced, which significantly improves the reliability of the vibration motor and extends its service life.

[0044] In one embodiment, see Figure 1The width of the avoidance hole 22 a is gradually increased from the side close to the center piece 21 to the side away from the center piece 21 .

[0045] The avoidance hole 22a is a key detail in the structural design of the vibration motor, and its width is designed in a unique way that it gradually increases from the side close to the center piece 21 to the side away from the center piece 21. In actual operation, there are multiple deformation drives at the end of the vibration component 10, and long-term vibration accumulation will cause the interface to bear huge stress.

[0046] The width of the avoidance hole 22a gradually increases from the side close to the center piece 21 to the side away from the center piece 21. This design cleverly adjusts the stress distribution inside the vibration motor. When the vibration motor is working, the stress will be distributed on various components as the vibration is transmitted. When the stress is transmitted to the connecting piece 22 and related parts, the gradual change design of the width of the avoidance hole 22a can act like a "stress regulator". The narrower width close to the center piece 21 can perform preliminary centralized control when the stress is initially transmitted, avoiding excessive dispersion of stress in this area and affecting the vibration transmission efficiency; as the stress is transmitted to the side away from the center piece 21, the width of the avoidance hole 22a gradually increases, which provides a larger dispersion space for stress, allowing the stress to be spread more evenly, avoiding stress concentration at the end of the connecting piece 22 away from the center piece 21.

[0047] In one embodiment, see Figure 1 The avoidance hole 22a and the connection portion of the connecting piece 22 away from the center piece 21 are arranged in an arc transition.

[0048] The arc transition setting between the avoidance hole 22a and the connecting piece 22 is an ingenious engineering design, which reduces the stress concentration at the connection through a smooth transition. In traditional designs, the right angles or sharp angles at the connection may cause stress concentration, thereby accelerating the cracking of the adhesive layer in a high humidity environment. The arc transition design can effectively disperse the stress, reduce the mechanical stress on the adhesive layer, and extend its service life. This design not only improves the reliability of the vibration motor, but also enhances its stability in harsh environments.

[0049] In actual applications, when the vibration motor works under high temperature and high humidity conditions, the arc transition between the connecting piece 22 and the avoidance hole 22a can effectively reduce the internal stress caused by temperature and humidity changes. This design reduces the risk of cracking of the adhesive layer by reducing stress concentration points, thereby improving the overall performance and durability of the vibration motor. In addition, the arc transition design also helps to reduce the noise and vibration of the vibration motor during operation, further improving the user experience.

[0050] In one embodiment, see Figure 1The connecting piece 22 includes a connecting portion 221 and a terminal portion 222, one end of the connecting portion 221 is connected to the central piece 21; a avoidance hole 22a is provided on one side of the connecting portion 221; the terminal portion 222 is connected to one end of the connecting portion 221 away from the central piece 21, and the thickness of the terminal portion 222 is greater than the thickness of the connecting portion 221.

[0051] In the design of a high-reliability vibration motor, the connecting piece 22 is a crucial component. It consists of two parts, the connecting portion 221 and the terminal portion 222. The design and function of these two parts have a direct impact on the performance of the entire vibration motor. The connecting portion 221 is the part of the connecting piece 22 that is directly connected to the center piece 21. Its function is to transmit the vibration force generated by the center piece 21 to other parts of the motor, and it is the key path for force transmission.

[0052] A relief hole 22a is provided on one side of the connection portion 221, which is a clever design to provide an additional space for the connection piece 22 to reduce stress concentration that may occur during vibration. The presence of the relief hole 22a allows the connection piece 22 to have a certain elastic space without sacrificing structural strength, which can reduce the internal stress caused by temperature and humidity changes to a certain extent, especially in a high temperature and high humidity environment. This design can effectively prevent the adhesive layer from cracking due to stress concentration.

[0053] The terminal portion 222 is the other end of the connecting piece 22, which is connected to the end of the connecting piece 221 away from the center piece 21, and its thickness is greater than the thickness of the connecting piece 221. This design makes the terminal portion 222 more structurally strong and able to withstand greater forces, while also providing better support for the connecting piece 22. The thickened design of the terminal portion 222 helps to disperse stress and reduce fatigue damage caused by long-term vibration, thereby extending the service life of the vibration motor.

[0054] The design of the connecting piece 22 forms an efficient force transmission and stress dispersion mechanism through the close connection between the connecting portion 221 and the central piece 21, the stress release of the avoidance hole 22a, and the thickened support of the terminal portion 222. The thickened design of the terminal portion 222 not only improves the bearing capacity of the connecting piece 22, but also helps to disperse stress and reduce fatigue damage caused by long-term vibration.

[0055] In one embodiment, see Figure 1 The end portion 222 is provided with a plurality of countersunk holes 222 a , and the plurality of countersunk holes 222 a are located on a side of the end portion 222 facing the vibration assembly 10 .

[0056] In the design of a high-reliability vibration motor, the design of multiple countersunk holes 222a at the end portion 222 not only helps to disperse stress, but is also optimized for increasing the space for placing glue. These countersunk holes 222a are located on the side of the end portion 222 facing the vibration component 10. Such a layout is directly related to the distribution and bonding effect of the glue. The presence of the countersunk holes 222a provides additional space for the glue, so that the glue can be more evenly distributed between the connecting piece 22 and the vibration component 10, enhancing the stability and durability of the bonding.

[0057] In one embodiment, see Figure 1 , the connecting portion 221 is a trapezoidal sheet component.

[0058] The design of the trapezoidal connecting portion 221 enables the connecting portion 221 to provide a larger contact area when connected to the center piece 21, thereby enhancing the efficiency and stability of force transmission. This design also allows the connecting portion 221 to disperse stress through its trapezoidal structure when subjected to vibration stress, thereby reducing stress concentration points and reducing the risk of cracking of the adhesive layer.

[0059] The asymmetric structure of the trapezoidal connecting portion 221 enables the connecting portion 221 to better adapt to the vibration characteristics of the center piece 21 when connected to the center piece 21. At the same time, a relief hole 22a is provided on one side of the connecting portion 221 to further reduce stress concentration. The terminal portion 222 is connected to the end of the connecting portion 221 away from the center piece 21, and the thickness of the terminal portion 222 is greater than the thickness of the connecting portion 221. This design makes the terminal portion 222 more structurally solid and able to withstand greater forces, while also providing better support for the connecting piece 22.

[0060] In one embodiment, see Figure 1 The spring piece 20 includes four connecting pieces 22 connected to the central piece 21 , and the four connecting pieces 22 are arranged at intervals around the periphery of the central piece 21 .

[0061] The design of the spring piece 20, through the connection of four connecting pieces 22 and the center piece 21, constitutes the core structure of the vibration motor. The four connecting pieces 22 are arranged at intervals around the periphery of the center piece 21 to form a stable support frame. This layout not only ensures the uniform transmission of force, but also improves the structural stability of the entire vibration motor. Each connecting piece 22 is responsible for transmitting the vibration force generated by the center piece 21 to the vibration component 10, and the design of the interval arrangement makes the force transmission more balanced and reduces the local stress concentration caused by the uneven distribution of force.

[0062] This evenly distributed force transmission is critical to the performance of the vibration motor in high temperature and high humidity environments. Under these harsh conditions, the spaced arrangement of the connecting pieces 22 helps to reduce the internal stress caused by temperature and humidity changes, thereby reducing the risk of cracking of the adhesive layer. In addition, the even distribution of the connecting pieces 22 also helps to reduce the noise and vibration of the vibration motor during operation, improving the user experience. When the vibration force is evenly transmitted through the connecting pieces 22, the stress on a single connecting piece 22 can be reduced, thereby reducing fatigue damage caused by long-term vibration and extending the service life of the vibration motor.

[0063] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vibration motor, characterized in that: The vibration motor comprises: Vibration components; and The spring piece includes a central piece and at least two connecting pieces, one end of each connecting piece is connected to the central piece, and the other end of each connecting piece is bonded to the vibration component; and one side of each connecting piece located between the central piece and the vibration component is a waist side, and an avoidance hole is provided on the waist side, and the avoidance hole is an arc-shaped hole.

2. The vibration motor according to claim 1, wherein: Each of the connecting pieces has two waist sides, and each of the waist sides is provided with an avoidance hole.

3. The vibration motor according to claim 1, wherein: The avoidance hole is arranged close to an end portion of the connecting piece away from the central piece.

4. The vibration motor according to claim 1, wherein: The avoidance hole is a streamline avoidance hole or a hyperbolic avoidance hole.

5. The vibration motor according to claim 4, characterized in that The width of the avoidance hole is gradually increased from a side close to the center piece to a side away from the center piece.

6. The vibration motor according to claim 4, characterized in that The avoidance hole and the connection portion of the connecting piece away from the central piece are connected at a point with an arc transition.

7. The vibration motor according to claim 1, wherein: The connecting piece comprises: A connecting portion, one end of which is connected to the central sheet; one side of the connecting portion is provided with the avoidance hole; and The terminal portion is connected to an end of the connecting portion away from the central piece, the terminal portion is bonded to the vibration component, and the thickness of the terminal portion is greater than the thickness of the connecting portion.

8. The vibration motor according to claim 7, wherein: The end portion is provided with a plurality of countersunk holes, and the plurality of countersunk holes are located on a side of the end portion facing the vibration component.

9. The vibration motor according to claim 7, wherein: The connecting portion is a trapezoidal sheet component.

10. The vibration motor according to claim 1, wherein The elastic sheet includes four connecting sheets connected to the central sheet, and the four connecting sheets are arranged at intervals around the periphery of the central sheet.

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