Thin motor carrier, thin motor, and electronic device

Abstract

The utility model relates to a kind of thin motor carrier, thin motor and electronic equipment, thin motor carrier includes carrier plastic department and the winding post embedded in carrier plastic department, the winding post is made of conductive material or conductive composite material, and with carrier plastic department is integrally formed by insert injection molding.The utility model provides a kind of thin motor carrier, thin motor and electronic equipment, the design of winding post embedded in plastic department, naturally forms the dual role of conductive channel and mechanical support body, eliminates the assembly gap and additional insulating layer required by traditional split structure, directly compresses carrier axial thickness, provides key space gain for thin motor;Integrally-formed process makes the molecular level combination of metal piece and plastic interface, greatly reduces the risk of interface thermal stress cracking, improves the structural integrity of carrier in temperature alternation environment.

Description

Technical Field

[0001] This utility model relates to the field of micro motor structure design, and in particular to a thin motor carrier and its application in thin motors and electronic devices. Background Technology

[0002] In the field of micromotors, traditional coil carriers typically employ a split design: the conductive metal components and the insulating plastic support components must be processed separately before assembly. This design has several limitations:

[0003] Inefficient space utilization: Exposed installation of conductive components requires reserved space for solder joint operations, which restricts the thinning of the carrier. At the same time, the additional insulation layer further increases the overall thickness.

[0004] Insufficient connection reliability: Separate assembly can easily lead to micro gaps between metal and plastic parts, which may cause fluctuations in contact resistance or even connection failure under vibration or thermal cycling conditions.

[0005] High process complexity: Metal parts lack a precise positioning mechanism in subsequent injection molding, which can easily lead to dimensional deviations in the finished product due to offset, requiring additional correction processes and reducing production efficiency.

[0006] While existing technologies attempt to alleviate the above problems by optimizing insulation materials or improving welding processes, they fail to fundamentally integrate conductive functions with structural support, making it difficult to simultaneously meet the requirements of lightweight and high reliability for thin motors. Utility Model Content

[0007] In view of this, the present invention provides a thin motor carrier with high space utilization, reliable electrical connection and easy manufacturing, as well as a motor and electronic equipment integrating the carrier.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A thin motor carrier includes a carrier plastic part and a winding post embedded in the carrier plastic part. The winding post is made of conductive material or conductive composite material and is integrally formed with the carrier plastic part by insert injection molding.

[0010] By embedding the winding posts into the carrier plastic part through an insert injection molding process, this design integrates the conductive function and structural support role, thereby reducing the need for additional insulation layers and helping to reduce the overall component complexity and manufacturing cost. The embedded nature of the winding posts provides a stable metal substrate for subsequent electrical connection processes (such as welding or wiring), improving the reliability and durability of electrical connections, while optimizing the spatial layout of solder joints and avoiding connection failures due to insufficient space. This one-piece molding method also enhances the overall mechanical strength of the carrier, reducing the risk of component loosening due to vibration or thermal expansion, thus increasing the service life of the motor carrier. In addition, the integrated design simplifies the production process, reduces assembly steps and potential human error, making the carrier more suitable for thin-body applications and laying the foundation for compact motor designs. Overall, this feature ensures stable electrical performance while taking into account structural optimization, supporting the efficient operation of thin motors.

[0011] Preferably, the top of the winding post is covered with a conductive bonding layer, which covers the top surface of the winding post and the joint of the wound copper wire.

[0012] A conductive bonding layer covering the top surface of the winding post and the joint of the wound copper wire helps enhance the stability and conductivity of the electrical connection interface. This layer protects the joint from environmental factors such as oxidation, moisture, or contamination, reducing the risk of increased contact resistance and thus improving the reliability of electrical signal transmission. Simultaneously, the conductive bonding layer acts as a physical barrier, preventing the copper wire from loosening or detaching during vibration or thermal cycling, ensuring connection integrity for long-term use. This design may also simplify soldering or crimping processes because the bonding layer provides a uniform conductive surface, reducing the requirements for precision machining and improving production yield. Furthermore, the encapsulated coverage helps distribute current load, preventing the formation of localized hot spots and improving overall energy efficiency and safety. Overall, this feature optimizes the durability of the electrical connection point without adding additional components, ensuring high-performance operation of the motor carrier.

[0013] Preferably, the conductive bonding layer is formed by coating with conductive adhesive, or by forming a metallurgical bonding layer on the top surface of the winding post through at least one of laser welding, resistance welding, and high-energy beam welding.

[0014] By offering a variety of optional connection methods, including conductive adhesive bonding, laser welding, resistance welding, and high-fusion welding, the adaptability and reliability of the electrical connection process between the metal winding post and the coil are significantly enhanced. Conductive adhesive bonding can be completed at lower temperatures, helping to avoid the risk of thermal damage to the plastic part material at high temperatures. Simultaneously, the fluidity of the adhesive can fill microscopic gaps, forming a uniform conductive interface and reducing contact resistance instability. Laser welding or resistance welding can achieve rapid fusion with localized high energy density, forming a metallurgical bond under precise control of the heat-affected zone, improving the mechanical strength and conductivity of the connection point, especially suitable for applications requiring high-frequency vibration. High-fusion welding, through deep melting of the metal interface, can generate a connection area with a larger cross-section, helping to disperse the current load and suppress electrochemical corrosion, extending connection life. The availability of multiple processes allows for flexible adjustments based on coil wire diameter, carrier material temperature resistance, and production conditions, avoiding yield bottlenecks caused by a single process. Furthermore, these connection methods all act directly on the embedded metal winding post, fully utilizing its stable metal matrix properties without the need for additional connection structures, thus maintaining the advantage of a thin carrier. Overall, this feature ensures the inherent reliability of electrical connections while providing technical flexibility for diverse production needs, further enhancing the practical value of thin motor carriers.

[0015] Preferably, the carrier plastic part has a positioning notch on the side of the winding post for inserting the injection mold support rod. The positioning notch is a blind hole structure and extends to the bottom surface of the winding post.

[0016] The blind hole structure of the positioning notch provides a precise insertion point for the injection mold support rod, helping to stabilize the position of the winding post during insert injection molding and preventing its displacement or tilting. The blind hole structure extending to the bottom surface of the winding post ensures that the support rod can directly contact and secure the metal component, improving molding accuracy and consistency and reducing product defects caused by inaccurate positioning. This design optimizes the reliability of the injection molding process, reduces mold wear and scrap rates, while simplifying production setup and shortening manufacturing cycles. The lateral placement of the positioning notch also facilitates quick mold disassembly and assembly, improving production efficiency. Furthermore, the blind hole structure avoids the risk of impurities entering through through holes, keeping the carrier's interior clean and enhancing overall structural integrity. Overall, this feature, through precise mold fitting, strengthens the quality control of one-piece molding, supporting the dimensional stability and functional reliability of the motor carrier.

[0017] Preferably, the carrier plastic part is provided with a clamping through hole for the mold claw to pass through, and the clamping through hole extends through the carrier plastic part.

[0018] The through-hole design facilitates the insertion and operation of the mold grippers, enabling safe and efficient clamping of carrier components during manufacturing. This through-hole structure allows the grippers to pass directly through the plastic portion, providing a uniform force distribution point, reducing the risk of stress concentration during clamping, thereby preventing carrier deformation or damage and improving production yield. The through-hole design simplifies automated processing, supports rapid loading and unloading and positioning, shortens assembly time, and reduces the need for manual intervention. When used in conjunction with positioning notches, this feature optimizes the synergy of the mold system, improving overall manufacturing accuracy and consistency. Furthermore, the through-holes contribute to heat dissipation and weight reduction, indirectly enhancing the thermal management performance of the carrier. Overall, this feature enhances production convenience and component maneuverability without compromising structural strength, providing practical advantages for mass production.

[0019] Preferably, the top surface of the winding post is lower than or flush with the upper surface of the carrier plastic part.

[0020] The design where the top surface of the winding post is lower than or flush with the upper surface of the plastic section helps protect the metal surface from external mechanical damage (such as scratches or impacts), reducing the risk of short circuits or oxidation. This flush or embedded layout optimizes the operating space for subsequent processes (such as soldering or coating), ensuring easy access and stability of connection points, and improving the quality and reliability of electrical connections. Simultaneously, this feature avoids assembly interference caused by protruding metal, facilitating the integration of the carrier with other components (such as coils or bases), enhancing the overall structural compactness and aesthetics. In terms of thermal management, the plastic section surrounding the metal top provides an insulating barrier, reducing heat conduction issues. Overall, this design enhances the carrier's protection and compatibility without sacrificing conductivity, offering additional advantages for thin-film applications.

[0021] Preferably, the positioning notch and the clamping through hole are located on two adjacent sidewalls of the winding post.

[0022] The positioning notches and clamping through-holes located on adjacent sidewalls of the winding post help optimize the spatial layout of mold operations, improving manufacturing efficiency and precision. This adjacent arrangement allows the support rods and grippers to work synergistically during injection molding, reducing the risk of interference and ensuring stable fixation and rapid positioning of the winding post. The separate layout also simplifies mold design, reducing complexity and cost while increasing production flexibility. This feature enhances the balanced force distribution of the component during clamping and molding, reducing deformation or displacement and improving product consistency. Furthermore, the distribution of adjacent sidewalls may improve the structural symmetry of the carrier, enhancing overall mechanical strength. Overall, this design, through spatial optimization, supports an efficient and reliable manufacturing process, indirectly improving the quality of the motor carrier.

[0023] Preferably, a thin motor includes a top cover, a base, a coil, a magnet, and a thin motor carrier as described above, and also includes a connecting spring that spans between two adjacent winding posts, and the contact surface between the connecting spring and the winding post forms a welded fixing part.

[0024] Integrating the thin motor carrier described above facilitates overall motor slimming, lightweighting, and high performance. The carrier's one-piece molding and embedded design optimizes space utilization, resulting in a more compact motor structure that facilitates integration into space-constrained applications. The carrier's electrical connections and structural features (such as winding posts or connecting springs) enhance the reliability between the coil and circuitry, reducing energy loss and failure rates, thereby improving motor efficiency and lifespan. Furthermore, optimized carrier manufacturing features (such as positioning notches or clamping through-holes) indirectly support large-scale motor production, reducing overall manufacturing costs. Overall, this design, through carrier innovation, strengthens the motor's vibration stability, thermal management, and durability, providing an efficient power source for various electronic devices. Connecting springs bridging adjacent winding posts and forming welded fixings at the contact surfaces help establish reliable electrical connection paths, simplifying circuit layout and assembly processes. The welded fixings provide stable mechanical and electrical interfaces, reducing the risk of loosening or breakage at connection points and improving overall structural rigidity and signal transmission continuity. This design allows the springs to absorb vibration or thermal expansion stresses, preventing fatigue failure caused by concentrated loads, thus extending the carrier's service life. The cross-connect layout optimizes space utilization, supports high-density wiring, and is suitable for the compact requirements of thin motors. Meanwhile, the welded mounting points facilitate standardized welding processes (such as reflow soldering), improving production efficiency and consistency. Overall, this feature enhances the modularity and reliability of electrical connections, providing additional assurance for stable motor operation.

[0025] Preferably, the welding fixing part is located in the semi-enclosed cavity formed by the carrier plastic part and the connecting spring piece.

[0026] The weld fixing section is located within a semi-enclosed chamber, which helps protect the weld joint from environmental factors such as dust, moisture, or physical impact, improving the long-term reliability and durability of the connection. The chamber structure provides mechanical shielding, reducing the direct effects of vibration or stress on the weld joint and lowering the risk of breakage or loosening. The semi-enclosed design also facilitates heat dissipation management, preventing hot spot accumulation while maintaining electrical insulation performance. This feature optimizes the accessibility of the welding process, ensuring that weld quality is easy to inspect and maintain. Furthermore, the chamber enclosure structure enhances the overall rigidity of the component, providing additional support for the connecting springs. Overall, this design strengthens the protection of electrical connections without adding additional encapsulation, providing additional assurance for the stable operation of the motor carrier.

[0027] Preferably, an electronic device includes a thin motor as described above.

[0028] Incorporating the thin motors described above enables slimmer, lighter designs for electronic devices while improving performance and reliability. The motor's compact structure optimizes internal space layout, supports high-density component integration, and enhances product aesthetics and portability. The motor carrier's efficient electrical connections and durable characteristics reduce energy loss and failure risk, extending device battery life and operational stability. This integration also simplifies device assembly processes, reduces maintenance needs, and improves overall production economics. At the application level, the vibration and thermal management advantages of thin motors can improve the user experience (e.g., reduced noise or heat generation). Overall, this feature, supported by high-performance motors, provides energy-efficient and reliable power solutions for electronic devices.

[0029] The advantages of this utility model compared to the prior art are:

[0030] The core innovation of this utility model lies in the integration of the structure and function of the winding post and the carrier plastic part through insert injection molding, which brings about the following significant progress compared with the prior art:

[0031] Space and structural optimization: The design of the winding post embedded in the plastic part naturally forms a dual role as a conductive channel and a mechanical support, eliminating the assembly gap and additional insulation layer required by traditional split structures, directly compressing the axial thickness of the carrier, and providing key space gain for thin motors; the one-piece molding process enables the metal parts and plastic interface to form a molecular-level bond, which greatly reduces the risk of interface thermal stress cracking and improves the structural integrity of the carrier under temperature alternation environment.

[0032] Improved electrical connection reliability: The embedded winding post provides a stable metal substrate for the welding / wiring process, avoiding the fretting wear of metal parts caused by vibration in the split carrier, and reducing the probability of abnormal increase in contact resistance from the root cause; the encapsulation effect of the insert injection molding can prevent moisture and contaminants from corroding the metal conductive interface, and extend the latency period of connection failure induced by electrochemical corrosion.

[0033] Manufacturing efficiency and cost advantages: The single injection molding process simultaneously completes the fixing and insulation encapsulation of conductive components, simplifying the traditional multi-process assembly process and reducing quality fluctuations caused by manual intervention; metal parts are directly positioned and formed in the mold, avoiding alignment errors in subsequent assembly, improving product size consistency, and reducing scrap losses.

[0034] The synergistic effect of these advancements makes this carrier an ideal solution that combines thinness, high reliability, and low manufacturing cost, expanding the design boundaries for the application of micromotors in consumer electronics, medical devices, and other fields. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of a thin motor according to an embodiment of the present invention.

[0037] Figure 2 This is a structural diagram of a carrier according to an embodiment of the present invention.

[0038] Figure 3 This is an assembly structure diagram of the carrier and connecting spring sheet according to an embodiment of the present invention.

[0039] Figure 4 This is a structural diagram of the base according to an embodiment of the present utility model.

[0040] Labeling explanation: 1 base, 2 carrier, 11 three-dimensional metal support frame, 111 external rib, 112 internal rib, 21 winding post, 212 copper wire, 22 carrier plastic part, 221 positioning notch, 222 clamping through hole, 4 connecting spring, 41 welding fixing part. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application 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 application.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0045] The technical solutions in this application will now be described with reference to the accompanying drawings. Example 1

[0046] This embodiment provides a thin motor, including a top cover, a base 1, a carrier 2, a coil, and a magnet. The carrier 2 has a winding area for winding the coil. The base 1 includes a three-dimensional metal support frame 11, which includes an outer rib 111 tightly attached to the outer surface of the base 1 and an inner rib 112 connected to the outer rib 111 and passing through the base 1 before tightly attached to the inner surface of the base 1, forming a three-dimensional frame. The outer rib 111 and the inner rib 112 are respectively wrapped and bonded to one side of the plastic part of the base. The carrier 2 has an embedded winding post 21, which is preferably made of conductive metals such as copper or copper alloys. The winding post 21 and the plastic part 22 of the carrier are integrally molded by insert injection molding. In traditional solutions, the metal insert must meet the function of conductivity, while the three-dimensional metal support frame 11 in this embodiment is made of non-conductive high-strength materials such as stainless steel 304 or nickel silver, and it only serves a structural support function. An independent conductive terminal is also provided inside the base 1, which extends out of the base to achieve external electrical connection.

[0047] A thin base structure is achieved through a three-dimensional metal support frame. The single-sided wrapping method avoids the minimum adhesive thickness limitation of traditional double-sided adhesive, helping to reduce the thickness of the base 1. The integrated design of the winding post 21 embedded in the carrier plastic part 22 integrates the conductive function with structural support, reducing the need for additional insulation layers. The connection structure between the outer rib 111 and the inner rib 112 enhances the mechanical interlocking force between the metal and the plastic, reducing the risk of delamination. The embedded characteristic of the winding post 21 provides a stable metal substrate for subsequent electrical connection processes, and the combination of the two provides a technical basis for the thinning of the motor and the improvement of reliability. The surface of the outer rib 111 of the three-dimensional metal support frame 11 is at least partially exposed on the outer surface of the base, the inner rib 112 is wrapped and bonded to the plastic part of the base on one side, and there are also independent conductive terminals extending from inside the base to the outside.

[0048] The three-dimensional metal support frame 11 is integrally formed from a single metal plate through continuous bending. Its outer ribs 111 and inner ribs 112 are connected by a bending section. This bending section is pre-inserted into a pre-drilled channel in the base plastic section before injection molding. During injection molding, the molten plastic covers the sidewalls of the bending section and one side surface of the ribs, forming a mechanically interlocking structure.

[0049] External ribs: embedded in the grooves on the outer surface of the base, with plastic covering their bottom and side edges (the top is in direct contact with the outer surface of the base).

[0050] Internal ribs: embedded in the grooves on the inner surface of the base, with plastic covering the top and side edges (the bottom is in direct contact with the outer surface of the base).

[0051] Bending section: Plastic fills the gap between it and the channel, forming a ring-shaped covering.

[0052] Note: This design achieves force transmission between the inner and outer ribs by bending metal through the plastic layer, while the single-sided coating avoids the thickness limitations of double-sided coating.

[0053] In this embodiment, the top of the winding post 21 is covered with a conductive bonding layer, which covers the top surface of the winding post 21 and the joint of the wound copper wire 212. The conductive bonding layer is formed by tinning or coating with conductive adhesive, covering the top surface of the winding post 21 and the joint of the copper wire 212 to ensure metallurgical bonding and oxidation resistance.

[0054] The conductive bonding layer fully covers the top surface of the winding post 21 and the joint of the copper wire 212, forming a continuous conductive interface. The tin layer is formed in one step through a tin-immersion process, avoiding the positional deviation of traditional manual soldering. The metallurgical bonding layer reduces contact resistance and minimizes current transmission loss. The encapsulated structure prevents oxidation of the contact surface between the copper wire 212 and the metal post 21, extending the electrical connection life. The tin layer fills the gaps between the copper wires 212, enhancing mechanical anchoring and suppressing wire loosening caused by vibration. This design eliminates the protrusion height of traditional solder joints, allowing the electrical connection point to be completely contained within the internal space of the carrier 2, avoiding interference with moving parts. The integrated conductive layer simplifies the production process and reduces the risk of thermal damage from the soldering process.

[0055] In this embodiment, the carrier plastic part 22 is provided with a positioning notch 221 for inserting the injection mold support rod on the side of the winding post 21. The positioning notch 221 is a blind hole structure and extends to the bottom surface of the winding post 21.

[0056] The mold support rod insertion notch 221 directly contacts the bottom surface of the metal pillar 21, preventing the metal pillar 21 from sinking due to injection pressure. The blind hole structure prevents molten plastic from seeping into the support contact surface, ensuring a smooth interface between the metal pillar 21 and the plastic part 22. The depth design of the notch 221 concentrates the support force on the solid part of the metal pillar 21, reducing the impact of plastic layer deformation on positioning accuracy. The closed bottom of the blind hole maintains the integrity of the outer surface of the carrier 2, preventing burrs or overflow. This structure improves the vertical stability of the metal pillar 21 during insert injection molding, ensuring the parallel arrangement requirements of the multi-wound pillars 21.

[0057] In this embodiment, the carrier plastic part 22 is provided with a clamping through hole 222 through which the mold clamping claw passes. The clamping through hole 222 passes through the carrier plastic part 22 and is perpendicular to the axis of the winding column.

[0058] The axially through-hole 222 allows the mold jaws to simultaneously secure the winding post 21 from both the top and bottom sides of the carrier 2. The jaws pass through the through-hole 222 to directly clamp the top and bottom surfaces of the metal post 21, providing bidirectional locking force to resist injection impact. The through-hole 222 facilitates jaw ejection, avoiding the problem of plastic debris residue easily remaining in traditional blind hole structures. This design enhances the torsional resistance of the metal post 21 during injection molding, especially suppressing axial deflection caused by high-speed injection flow impact. The plastic surrounding the through-hole 222 forms a ring-shaped reinforcing structure, compensating for localized strength loss in the opening area. The clamping force acts directly on the metal solid, reducing the impact of plastic layer stress deformation on positional accuracy.

[0059] In this embodiment, a connecting spring 4 is also included, which is connected across two adjacent winding posts 21, and the contact surface between the connecting spring 4 and the winding post 21 forms a welding fixing part 41.

[0060] The connecting spring 4 bridges adjacent winding posts 21 to achieve circuit conduction, and its welded fixing part 41 is directly fused to the surface of the metal post 21. The bridging of the spring 4 shortens the current path, reducing line impedance and electromagnetic interference risks. Surface contact welding replaces traditional spot welding, increasing the effective conductive area. The metallurgical bonding of the welded fixing part 41 provides stable current carrying capacity and has better resistance to mechanical vibration than mechanical pressing. This structure enables modular circuit connection, simplifying the post-winding assembly process. The pre-formed design of the spring 4 facilitates automated assembly, reducing manual adjustment time. The welding area is located on the surface of the metal post 21, utilizing the thermal conductivity of the metal to quickly dissipate welding heat, reducing the risk of thermal deformation of surrounding plastics.

[0061] In this embodiment, the top surface of the winding post 21 is lower than or flush with the upper surface of the carrier plastic part 22.

[0062] The top of the winding post 21 does not protrude from the upper surface of the carrier 2, allowing the winding area to be completely recessed into the internal space of the carrier 2. This design eliminates any vertical protrusions that may be caused by the copper wire 212 or solder joints, preventing interference with the rotating rotor assembly. The recessed or flush top surface provides a flat reference for subsequent assembly, facilitating precise positioning by automated equipment. The upper surface of the carrier's plastic part 22 forms a protective ring around the top of the metal post 21, reducing the probability of external impact damage to the conductive interface. High uniformity ensures even distribution of winding tension, reducing slippage of the copper wire 212 or localized stress concentration caused by height differences. The flattened layout optimizes the utilization of the motor's internal space, leaving design margins for the heat dissipation structure.

[0063] In this embodiment, the positioning notch 221 and the clamping through hole 222 are located on two adjacent sidewalls of the winding post 21, respectively.

[0064] Positioning notches 221 and clamping through-holes 222 are respectively located on adjacent sidewalls of the winding posts 21, making the mold force directions orthogonal. The support rod provides vertical support through the positioning notches 221, and the grippers apply horizontal constraint through the clamping through-holes 222, forming a six-degree-of-freedom spatial constraint. The adjacent sidewall layout shortens the lever arm length, enhancing the ability to resist overturning moments. The staggered distribution of the dual structures avoids stress superposition, reducing the risk of deformation of the metal posts 21. The orthogonal force system optimizes the moment balance during injection molding, suppressing the rotational tendency of the metal posts 21. This design maximizes the use of the sidewall space of the metal posts 21, achieving high-precision positioning within a limited area and ensuring the equidistant arrangement requirements of multiple winding posts 21.

[0065] In this embodiment, the bottom surface of the three-dimensional metal support frame 11 and the bottom surface of the plastic part of the base are on the same plane.

[0066] The bottom surface of the three-dimensional metal support frame 11 is coplanar with the bottom surface of the plastic part of the base, forming a complete and flat installation interface. The metal area directly contacts the equipment mounting surface, improving heat conduction efficiency and mechanical stability. The plastic area fills the gaps in the metal frame, avoiding localized stress concentration during installation. The stepless fit eliminates edge glue overflow or height differences in traditional rubber-coated structures, ensuring a tight fit between the base 1 and the equipment cover. The coplanar characteristic reduces the flatness requirements of the mounting surface, accommodating slightly curved contact surfaces. The flat bottom surface reduces dust and debris accumulation, meeting the requirements for use in clean environments. This feature simplifies the machining accuracy requirements of the base 1, facilitating quality control in mass production.

[0067] In this embodiment, the welding fixing part 41 is located in the semi-closed cavity formed by the carrier plastic part 22 and the connecting spring piece 4.

[0068] The welding fixing part 41 is concealed within the semi-enclosed chamber of the carrier 2, achieving physical isolation of the electrical connection point. The chamber is formed by the carrier's plastic part 22 and the connecting spring 4, creating an anti-touch barrier to prevent accidental damage to the weld joint during manual assembly or maintenance. The semi-enclosed structure blocks dust and moisture from eroding the welding area, delaying the degradation of conductivity caused by oxidation. This chamber limits the spread of welding spatter, maintaining the cleanliness of the motor's interior. The plastic chamber wall absorbs mechanical vibration energy, reducing the probability of microcrack formation. The semi-enclosed chamber design improves high-voltage insulation safety and reduces the risk of arc discharge. Example 2

[0069] This embodiment provides an electronic device, including a thin motor as described in Embodiment 1. The thin base structure of the thin motor is adapted to the compact internal space layout of electronic devices, such as the lens focusing drive module of a smartphone, the gimbal stabilization mechanism of a micro drone, or the haptic feedback unit of a wearable device. Through the coplanar design of the three-dimensional metal support frame and the base plastic part, the device shell and the mounting surface of the thin motor fit together without any step difference, improving the overall structural integration. The structure of the winding post embedded in the carrier plastic part, combined with the hidden welding fixing part, eliminates the spatial interference of traditional motor solder points on adjacent components, providing more space for the arrangement of high-density electronic components on the device's motherboard. The mechanical strength and electrical connection reliability of the thin motor can meet the impact resistance and long-term vibration requirements of electronic devices in mobile scenarios, and is especially suitable for ultra-thin consumer electronics products that are sensitive to thickness.

[0070] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin motor carrier characterized by, It includes a carrier plastic part (22) and a winding post (21) embedded in the carrier plastic part (22). The winding post (21) is made of conductive material or conductive composite material and is integrally formed with the carrier plastic part (22) by insert injection molding.

2. The thin motor carrier according to claim 1, characterized by The top of the winding post (21) is covered with a conductive bonding layer, which covers the top surface of the winding post and the joint of the wound copper wire (212).

3. The thin motor carrier according to claim 2, characterized in that, The conductive bonding layer is formed by coating with conductive adhesive, or by forming a metallurgical bonding layer on the top surface of the winding post through at least one of laser welding, resistance welding, and high-energy beam fusion welding.

4. The thin motor carrier of claim 1, wherein, The carrier plastic part (22) has a positioning notch (221) on the side of the winding post (21) for inserting the injection mold support rod. The positioning notch (221) is a blind hole structure and extends to the bottom surface of the winding post (21).

5. The thin motor carrier of claim 3, wherein, The carrier plastic part (22) is provided with a clamping through hole (222) through which the mold clamping claw passes. The clamping through hole (222) passes through the carrier plastic part (22).

6. The thin motor carrier of claim 1, wherein, The top surface of the winding post (21) is lower than or flush with the upper surface of the carrier plastic part (22).

7. The thin motor carrier of claim 4, wherein, The positioning notch (221) and the clamping through hole (222) are located on two adjacent side walls of the winding post (21), respectively.

8. A thin motor, comprising a top cover, a base (1), a coil, a magnet and a thin motor carrier (2) as claimed in any one of claims 1-7, and further comprising a connecting spring (4) bridging two adjacent winding posts (21), wherein the contact surface of the connecting spring (4) and the winding post (21) forms a welded fixing part (41).

9. The thin motor according to claim 8, characterized in that, The welding fixing part (41) is located in the semi-closed cavity formed by the carrier plastic part (22) and the connecting spring piece (4).

10. An electronic device, comprising: Including the thin motor as described in claim 9.

Images