Integrated powder metallurgy vibrator for linear vibration motor

Abstract

The invention relates to the technical field of vibration motors, and discloses an integrated powder metallurgy vibrator for a linear vibration motor, the vibrator is integrally formed by iron-based powder metallurgy, the vibrator comprises a main body frame, a magnetic steel accommodating cavity for accommodating magnetic steel is arranged in the main body frame, and welding bulges for welding springs are arranged on two sides of the main body frame; by adopting the iron-based powder metallurgy material and the integrated structural design, on the premise of ensuring the vibration quantity (such as 1.5 G), the manufacturing cost of the vibrator is greatly reduced, the production process of the vibrator is simplified, the quality is controllable, and the production efficiency is improved. By the adoption of the powder metallurgy near-net forming technology, the structure with the complex protrusions and the cavities can be integrally manufactured, multi-procedure machining is avoided, the process is simplified, the production efficiency and consistency are improved, the technology adaptability is high, the yield is high, and stable batch production is better facilitated.

Description

Technical Field

[0001] This invention relates to the field of vibration motor technology, and more specifically to an integrated powder metallurgy oscillator for a linear vibration motor. Background Technology

[0002] Currently, linear vibration motors typically use high-density metallic materials (such as tungsten or tungsten alloys) to manufacture the oscillator. Although tungsten has high density, it has the following significant drawbacks: High cost: Tungsten is a rare metal, and the price of raw materials is high, resulting in extremely high cost per oscillator. High processing difficulty: Tungsten material has high hardness and high brittleness, making it difficult to process oscillators with complex structures such as protrusions and grooves, resulting in low yield and low production efficiency; Design limitations: Due to limitations of traditional processing methods, it is difficult to achieve fine structural design while controlling weight, such as local weight increase and internal cavity optimization. Supply chain risks: Tungsten is a strategic and scarce resource with large price fluctuations and poor supply chain stability.

[0003] Based on this, the present invention proposes an integrated powder metallurgy oscillator for a linear vibration motor. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated powder metallurgy oscillator for linear vibration motors. By adopting iron-based powder metallurgy materials and an integrated structural design, the manufacturing cost of the oscillator is significantly reduced and its production process is simplified while ensuring the vibration amount (e.g., 1.5G).

[0005] The technical problem solved by this invention is: This invention solves the following major technical problems caused by the use of high-density metal materials (such as tungsten) to make the oscillator in existing linear vibration motors: High cost issue: High raw material prices lead to high unit costs for the oscillator; Complex processing issues: High-hardness materials are difficult to process, especially for oscillators with complex structures such as fine protrusions and grooves, which are difficult to form, have low production efficiency, and make it difficult to guarantee the yield rate. Design limitations: Due to traditional manufacturing methods, it is difficult to control the total weight while flexibly optimizing the internal space and external structure of the oscillator (such as local weight-increasing design) to achieve the best performance-cost balance.

[0006] The objective of this invention can be achieved through the following technical solutions: An integral powder metallurgy oscillator for a linear vibration motor, the oscillator being integrally formed using iron-based powder metallurgy, comprising a main frame: The main frame has a magnet receiving cavity inside for accommodating magnets, welding protrusions on both sides for welding springs, and a bottom counterweight protrusion at the bottom for local weight increase.

[0007] As a further aspect of the present invention: the overall dimensions of the oscillator are 6.5mm × 7.3mm × 2.7mm, and the weight is 0.65g.

[0008] As a further aspect of the present invention: the dimensions of the magnet receiving cavity are 2.4mm × 5mm × 1.2mm.

[0009] As a further aspect of the present invention, the height of the welding protrusion is 0.4 mm.

[0010] As a further aspect of the present invention: the height of the bottom counterweight protrusion is 0.4 mm and the width is 0.8 mm.

[0011] As a further aspect of the present invention, the oscillator is formed near-net-shape using powder metallurgy.

[0012] As a further aspect of the present invention: the oscillator is applied in a linear vibration motor, which can achieve a vibration amount of about 1.5G.

[0013] The beneficial effects of this invention are: (1) The present invention significantly reduces costs and has outstanding economic benefits. By replacing expensive heavy metals such as tungsten with inexpensive iron-based materials and combining them with efficient powder metallurgy processes, the cost of a single oscillator is reduced from approximately RMB 1.1 / gram (tungsten) to approximately RMB 0.22 / piece, providing a decisive price advantage for large-scale applications. (2) The present invention improves productivity and makes quality controllable. The powder metallurgy near-net-shape forming process enables the integrated manufacturing of structures with complex protrusions and cavities, avoiding multi-process machining, simplifying the process, improving production efficiency and consistency, having strong process adaptability, high yield, and being more conducive to stable mass production. (3) Through the structural weight-increasing design such as the bottom protrusion, the present invention accurately compensates for the low density of iron material, enabling the oscillator weighing only 0.65g to drive the motor to achieve a vibration of about 1.5G, which is comparable to the performance level of traditional high-density material oscillators. (4) The present invention has a high degree of design freedom and can more flexibly optimize the internal space (magnetic cavity) and external counterweight to achieve the best balance between weight, space and performance. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This invention relates to a three-dimensional integrated powder metallurgy oscillator for a linear vibration motor. Figure 1 ; Figure 2 This invention relates to a three-dimensional integrated powder metallurgy oscillator for a linear vibration motor. Figure 2 ; Figure 3 This is a front view of an integrated powder metallurgy oscillator for a linear vibration motor according to the present invention. Figure 4 This is a rear view of an integrated powder metallurgy oscillator for a linear vibration motor according to the present invention. Figure 5 yes Figure 4 Half-section view of CC; Figure 6 yes Figure 4 Half-section view of DD.

[0016] In the diagram: 1. Main frame; 2. Magnet housing cavity; 3. Welded protrusion; 4. Bottom counterweight protrusion. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-6 As shown, this invention is an integrated powder metallurgy oscillator for a linear vibration motor. It uses iron-based powder as the raw material and manufactures the oscillator body integrally using powder metallurgy technology. Specifically, it includes: The main frame 1 has an overall size of approximately 6.5mm × 7.3mm × 2.7mm, and has an internal magnet receiving cavity 2 for accommodating magnets. The magnet receiving cavity 2 has a size of 2.4mm × 5mm × 1.2mm. Welding protrusions 3 are provided on both sides of the main frame 1 with a height of 0.4mm. Welding protrusions 3 are used to reliably weld and fix the spring. Bottom counterweight protrusions 4: Two bottom counterweight protrusions 4 with a height of 0.4 mm and a width of 0.8 mm are provided at the bottom of the main frame 1. They are used to locally increase the weight to compensate for the low density of the iron-based material and ensure that the oscillator has sufficient inertial mass.

[0019] Through the collaborative design of the above structures, an oscillator weighing approximately 0.65g was finally achieved. While ensuring that the motor can achieve the performance requirement of approximately 1.5G vibration, the unit cost was significantly reduced to approximately 0.22 yuan, successfully achieving the goal of "compensating for the material density gap with structural and process innovation and achieving a balance between high performance and low cost".

[0020] It should be noted that this application combines low-cost iron-based materials, near-net-shape powder metallurgy processes, and innovative structural designs with localized weight gain characteristics, systematically solving the cost and manufacturing bottlenecks of traditional high-density material oscillators.

[0021] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An integrated powder metallurgy oscillator for a linear vibration motor, characterized in that, The oscillator is integrally formed using iron-based powder metallurgy, including the main frame (1): The main frame (1) has a magnet receiving cavity (2) for accommodating magnets inside, welding protrusions (3) for welding springs on both sides, and a bottom counterweight protrusion (4) for local weight increase at the bottom.

2. The integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The overall dimensions of the oscillator are 6.5mm × 7.3mm × 2.7mm, and its weight is 0.65g.

3. The integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The dimensions of the magnet receiving cavity (2) are 2.4mm × 5mm × 1.2mm.

4. The integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The height of the welding protrusion (3) is 0.4 mm.

5. An integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The bottom counterweight protrusion (4) has a height of 0.4 mm and a width of 0.8 mm.

6. An integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The oscillator is formed near-net-shape using powder metallurgy.

7. An integrated powder metallurgy oscillator for a linear vibration motor according to claim 1, characterized in that, The oscillator is used in a linear vibration motor and can achieve a vibration level of approximately 1.5G.

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