Lightweight noise reduction voice coil motor

Abstract

The utility model relates to voice coil motor technical field, concretely is a kind of lightweight noise reduction type voice coil motor, including lower shell, middle shell, upper shell, guide bush, motor upper shell, motor lower shell, buffer block, tower spring, gasket, buffer sleeve and fastening screw, lower shell, middle shell and upper shell are connected by fastening screw and are integrated;Adopt thin-wall injection-molded guide bush, aluminum stretch shell, motor and guide sleeve are rib line contact and use lubricating oil, to wide face sealing element sealing, set special guide bush and tower spring.After electrification, motor lower shell and upper shell generate magnetic field, drive upper shell reciprocating motion to realize vibration, the utility model light weight noise reduction type voice coil motor effectively reduces weight and manufacturing cost, reduces working noise, improves sealing performance and prevents liquid leakage, optimizes guiding function and vibration intensity, improves user experience.

Description

Technical Field

[0001] This utility model relates to the field of voice coil motor technology, specifically a lightweight and noise-reducing voice coil motor. Background Technology

[0002] In various devices requiring vibration functionality, the vibration motor is one of the core components, and its performance directly affects the overall usability and user experience. Currently, there are various specifications of vibration motor products on the market. The technical implementation of these products mainly revolves around the basic vibration function, and there is still room for improvement in areas such as structural optimization, performance enhancement, and cost control.

[0003] Currently available vibration motors suffer from significant performance and structural defects. Firstly, their overall weight is excessively heavy, increasing the overall load on the equipment, leading to high material consumption during manufacturing, and raising logistics costs during transportation, hindering mass production and application. Secondly, the motors generate excessive noise during operation, which severely impacts the user experience and reduces market competitiveness when the equipment is used at close range. Furthermore, existing vibration motors generally lack sealing performance, leading to frequent liquid leaks in humid environments or applications involving contact with liquids. This not only damages internal components and shortens the motor's lifespan but can also cause equipment malfunctions and safety hazards. Therefore, there is an urgent need to develop a lightweight, noise-reducing voice coil motor to overcome these shortcomings in practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a lightweight, noise-reducing voice coil motor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A lightweight, noise-reducing voice coil motor includes an outer housing for forming an external protective structure for the motor, and further includes: The motion assembly includes an upper motor housing and a lower motor housing. The upper motor housing is fitted over the lower motor housing. Copper wire is wound around the outer ring of the lower motor housing, and a wire for connecting an external power supply is provided at the tail of the lower motor housing. A magnet is provided at the bottom of the upper motor housing so that it can generate a magnetic field together with the lower motor housing after being energized, and drive the upper motor housing to perform linear reciprocating motion along the lower motor housing. A guide bushing is fitted onto the outer ring of the upper housing of the motor and is used to guide the reciprocating motion of the upper housing of the motor. A sealing component, which is located at the joint of the outer housing, is used to seal the outer housing. A buffer sleeve is fitted around the outer ring of the lower housing of the motor and is pressed between the lower housing of the motor and the outer housing. It is used to buffer the impact force when the upper housing of the motor reciprocates to near the bottom of the outer housing.

[0006] As a further embodiment of this utility model: the outer shell includes a lower shell, a middle shell and an upper shell, and the lower shell, the middle shell and the upper shell are detachably connected as a whole by fastening screws; The sealing component is located at least once between the middle shell and the upper shell, and between the middle shell and the lower shell, and the buffer sleeve is pressed between the lower shell and the lower shell of the motor.

[0007] As a further embodiment of this utility model: the guide bushing is a thin-walled structure and is manufactured by injection molding; the lower shell, middle shell and upper shell of the outer shell are all aluminum drawn parts and are manufactured by drawing process.

[0008] As a further aspect of this utility model: the contact position between the upper housing of the motor and the guide bushing is set as rib line contact, and the contact part between the upper housing of the motor and the guide bushing is provided with lubricating oil to reduce frictional noise when the two move relative to each other.

[0009] As a further embodiment of this utility model: the sealing component includes a first sealing gasket and a second sealing gasket, the first sealing gasket is disposed in the upper groove of the middle shell and is squeezed by the upper shell, and the second sealing gasket is disposed in the lower groove of the middle shell and is squeezed by the lower shell. Both the first and second sealing gaskets are wide-face sealing elements to increase the sealing contact area.

[0010] As a further embodiment of this utility model, it also includes a buffer block and a tower spring, wherein the inner hole of the buffer block is sleeved on the tail of the tower spring, and the bottom protrusion of the buffer block is embedded in the corresponding hole of the upper housing of the motor for limiting. The tail of the tower spring is inserted into the hole in the upper housing of the motor for limitation, and the top of the tower spring is close to the inner surface of the upper housing of the outer housing and is always in a compressed state. The buffer block is pressed against the upper end surface of the upper housing of the motor by the tower spring to buffer the impact force when the upper housing of the motor reciprocates to near the top of the outer housing.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. By adopting a thin-walled guide bushing design and using injection molding for mass production, and designing the outer shell as an aluminum stretched part and mass-producing it through stretching, the overall weight of the product is significantly reduced while ensuring the structural strength and guiding performance of the motor. At the same time, the manufacturing process is simplified, and the consumption of materials and labor time in the manufacturing process is reduced, thereby reducing the manufacturing cost and transportation cost of the product, which is conducive to the mass production and promotion of the product. 2. By changing the contact position between the motor and the guide sleeve to rib line contact to reduce the contact area, and using lubricating oil to reduce friction noise, while optimizing the sealing structure to prevent sound from being transmitted to the outside, the noise generated by the motor during operation is effectively reduced, and the user experience is improved. 3. By using wide-face seals instead of traditional sealing rings, the sealing contact area is increased, significantly enhancing the product's sealing performance, effectively preventing liquid leakage, extending the motor's service life, and reducing the risk of equipment failure. 4. By designing a guide bushing, the bulky and complex guide ball bushings on the market are replaced. Without changing the internal motor structure and maintaining the same vibration force, a better guiding function is achieved. At the same time, a tower spring is used instead of a traditional compression spring. When the tower spring is fully compressed, the movement stroke of the vibration motor is not reduced too much, ensuring the stability and improvement of the product's vibration force and further optimizing the motor's vibration performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of the lightweight noise-reducing voice coil motor of this utility model.

[0013] Figure 2 This utility model Figure 1 A schematic diagram of the cross-sectional structure of AA.

[0014] Figure 3 This is a side view of the distribution of fastening screws in this utility model.

[0015] In the diagram: 1-lower shell, 2-middle shell, 3-upper shell, 4-guide bushing, 5-motor upper shell, 6-motor lower shell, 7-buffer block, 8-tower spring, 9-first sealing gasket, 10-second sealing gasket, 11-buffer sleeve, 12-fastening screw. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] Please see Figures 1-3 The present invention provides a lightweight, noise-reducing voice coil motor that solves the problems of existing vibration motors being heavy, costly to manufacture, noisy, and prone to liquid leakage.

[0019] This voice coil motor includes the following components: lower housing 1, middle housing 2, upper housing 3, guide bushing 4, motor upper housing 5, motor lower housing 6, buffer block 7, tower spring 8, first sealing gasket 9, second sealing gasket 10, buffer sleeve 11, and fastening screw 12.

[0020] The lower shell 1, middle shell 2 and upper shell 3 are detachably connected as a whole by fastening screws 12 to form the external shell structure of the motor; The guide sleeve 4 is fitted onto the outer ring of the motor upper housing 5, and the guide sleeve 4 is limited between the first sealing gasket 9 and the second sealing gasket 10 to achieve radial positioning; The upper housing 5 of the motor is fitted onto the outside of the lower housing 6 of the motor, and the two together form the core moving components of the motor. The inner hole of the buffer block 7 is fitted onto the tail of the tower spring 8. The bottom protrusion of the buffer block 7 is embedded into the corresponding hole of the upper housing 5 of the motor to achieve a limit. Under the squeezing action of the tower spring 8, the buffer block 7 is tightly attached to the upper end face of the upper housing 5 of the motor. The tail of the tower spring 8 is inserted into the hole of the upper housing 5 of the motor to complete the axial limiting. The top of the tower spring 8 is close to the inner surface of the upper housing 3, and the tower spring 8 is always in a compressed state and has elastic restoring ability. The first sealing gasket 9 is installed in the upper groove of the middle shell 2. When the upper shell 3 is fastened to the middle shell 2, the first sealing gasket 9 is squeezed by the upper shell 3 to achieve a seal. The second sealing gasket 10 is installed in the lower groove of the middle shell 2. After the lower shell 1 and the middle shell 2 are fastened together, the second sealing gasket 10 is squeezed by the lower shell 1 to achieve a seal. The buffer sleeve 11 is fitted onto the outer ring of the lower housing 6 of the motor, and the buffer sleeve 11 is pressed between the lower housing 6 and the lower housing 1 of the motor, so as to play a role in buffering and shock absorption.

[0021] In one embodiment of this utility model, to address the problems of existing motors being heavy, bulky, and having high manufacturing and transportation costs, this utility model adopts the following structural optimization design: The guide bushing 4 adopts a thin-walled structure design and is mass-produced through injection molding, which greatly reduces the amount of material used while ensuring the guiding strength; The lower shell 1, middle shell 2 and upper shell 3 are all designed as aluminum stretched parts, which are mass-produced through a stretching process to replace the traditional heavy metal shell structure.

[0022] The thin-walled injection-molded guide bushing 4 and the aluminum drawn-formed housing effectively reduce the overall weight of the motor and decrease energy consumption during transportation. Furthermore, both injection molding and drawing processes are suitable for mass production, reducing manufacturing difficulty and production time, thereby significantly lowering the product's manufacturing cost.

[0023] In one embodiment of this utility model, to address the problem of excessive noise during operation of existing motors, this utility model achieves noise reduction through structural optimization: The contact area between the motor upper housing 5 and the guide sleeve 4 adopts a rib line contact design, replacing the traditional surface contact, which greatly reduces the contact area between the two. Lubricating oil is added to the contact area between the motor housing 5 and the guide sleeve 4 to reduce frictional noise during relative movement; By tightly pressing the first sealing gasket 9 and the second sealing gasket 10 with the housing, the overall sealing structure is optimized, reducing the transmission of internal motor noise to the outside.

[0024] The ribbed contact design, combined with lubricating oil, effectively reduces frictional noise between moving parts; the optimized sealing structure prevents noise from propagating outward. This dual effect significantly reduces the noise level of the motor during operation, improving the customer's user experience.

[0025] In one embodiment of this utility model, to address the problems of insufficient sealing performance and frequent liquid leakage in existing motors, this utility model optimizes the sealing structure: Both the first sealing gasket 9 and the second sealing gasket 10 adopt a wide-face sealing structure to replace the traditional sealing ring; The first sealing gasket 9 and the second sealing gasket 10 are tightly fitted into the groove of the middle shell 2 by the squeezing action of the upper shell 3 and the lower shell 1, respectively, forming a reliable sealing surface.

[0026] The wide-face seal increases the sealing contact area, and the tight fit formed by the extrusion of the housing makes the sealing performance more reliable, effectively preventing external liquid from entering the motor or internal liquid from leaking to the outside, thus solving the problem of liquid leakage.

[0027] In one embodiment of this utility model, to improve guiding performance and vibration intensity, the utility model incorporates the following structural design: The specially designed guide bushing 4 is lightweight and simplified, and is used to replace the bulky and complex guide ball bushing in the existing technology. It achieves better guiding function without changing the core internal structure of the motor and retaining the original vibration force. The tower spring 8 is used instead of the traditional compression spring. The connection method and compression state between the tail of the tower spring 8 and the buffer block 7 and the upper housing 5 of the motor ensure that the tower spring 8 will not excessively reduce the motor's stroke when fully compressed.

[0028] The dedicated guide bushing 4 simplifies the structure and reduces weight while ensuring the guiding accuracy of the motor movement; the special structural design of the tower spring 8 avoids excessive shortening of the motion stroke, ensuring that the motor can maintain sufficient vibration force during reciprocating motion, thus improving the performance of the product.

[0029] In summary, the outer ring of the lower motor housing 6 is wound with regularly arranged copper wires, and the tail of the lower motor housing 6 is provided with a wire for connecting to a power source. A magnet is provided at the bottom of the upper motor housing 5. When the lower motor housing 6 is connected to a power source, a magnetic field is generated between the lower motor housing 6 and the upper motor housing 5. By changing the positive and negative terminals of the power supply to the lower motor housing 6, the generated magnetic field can be continuously changed, thereby driving the upper motor housing 5 to perform linear reciprocating motion with the lower motor housing 6 as the reference.

[0030] When the upper motor housing 5 moves away from the lower motor housing 6, it drives the buffer block 7 to compress the tower spring 8 until the upper protrusion of the buffer block 7 contacts the inner surface of the upper housing 3. Subsequently, the elastic force of the tower spring 8 pushes the upper motor housing 5 and the buffer block 7 in the opposite direction towards the lower motor housing 6 until the buffer sleeve 11 is compressed to its limit position. This reciprocating motion is repeated to achieve the vibration effect of the entire voice coil motor.

[0031] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lightweight, noise-reducing voice coil motor, comprising an outer housing for forming an external protective structure for the motor, characterized in that, Also includes: The motion assembly includes an upper motor housing (5) and a lower motor housing (6). The upper motor housing (5) is fitted over the lower motor housing (6). The lower motor housing (6) has copper wires wound around its outer ring, and the tail of the lower motor housing (6) has wires for connecting to external power supplies. The bottom of the upper motor housing (5) has a magnet so that when energized, it and the lower motor housing (6) together generate a magnetic field and drive the upper motor housing (5) to reciprocate linearly along the lower motor housing (6). Guide bushing (4), the guide bushing (4) is sleeved on the outer ring of the motor upper housing (5) and is used to guide the reciprocating motion of the motor upper housing (5); A sealing component, which is located at the joint of the outer housing, is used to seal the outer housing. The buffer sleeve (11) is fitted on the outer ring of the lower housing (6) of the motor and is pressed between the lower housing (6) of the motor and the outer housing. It is used to buffer the impact force when the upper housing (5) of the motor reciprocates to the bottom of the outer housing.

2. The lightweight, noise-reducing voice coil motor according to claim 1, characterized in that, The outer shell includes a lower shell (1), a middle shell (2) and an upper shell (3), which are detachably connected as a whole by fastening screws (12); The sealing component is located at least once between the middle shell (2) and the upper shell (3) and between the middle shell (2) and the lower shell (1), and the buffer sleeve (11) is pressed between the lower shell (6) and the lower shell (1).

3. The lightweight, noise-reducing voice coil motor according to claim 1, characterized in that, The guide bushing (4) is a thin-walled structure and is manufactured by injection molding; the lower shell (1), middle shell (2) and upper shell (3) of the outer shell are all aluminum drawn parts and are manufactured by drawing process.

4. The lightweight, noise-reducing voice coil motor according to claim 1, characterized in that, The contact position between the upper housing (5) of the motor and the guide bushing (4) is set as rib line contact, and the contact part between the upper housing (5) of the motor and the guide bushing (4) is provided with lubricating oil to reduce friction noise when the two move relative to each other.

5. The lightweight, noise-reducing voice coil motor according to claim 2, characterized in that, The sealing component includes a first sealing gasket (9) and a second sealing gasket (10). The first sealing gasket (9) is located in the upper groove of the middle shell (2) and is squeezed by the upper shell (3). The second sealing gasket (10) is located in the lower groove of the middle shell (2) and is squeezed by the lower shell (1). Both the first sealing gasket (9) and the second sealing gasket (10) are wide-face sealing elements to increase the sealing contact area.

6. The lightweight, noise-reducing voice coil motor according to claim 1, characterized in that, It also includes a buffer block (7) and a tower spring (8), wherein the inner hole of the buffer block (7) is fitted onto the tail of the tower spring (8), and the bottom protrusion of the buffer block (7) is embedded in the corresponding hole of the upper housing (5) of the motor for limiting; The tail of the tower spring (8) is inserted into the hole of the upper housing (5) of the motor for limiting. The top of the tower spring (8) is close to the inner surface of the upper housing (3) of the outer housing and is always in a compressed state. The buffer block (7) is pressed against the upper end surface of the upper housing (5) by the tower spring (8) to buffer the impact force when the upper housing (5) of the motor reciprocates to the top of the outer housing.

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