Driving iron core assembly for shutter device and shutter device

Abstract

The invention discloses a driving iron core assembly for a shutter device and the shutter device, the shutter device comprises the driving iron core assembly, the driving iron core assembly comprises a metal magnetic conductive iron core and a plastic base, and the metal magnetic conductive iron core and the plastic base are integrally formed and connected through injection molding; a blade positioning column set and a magnet positioning column set are formed on the plastic base in an injection molding mode, the column axis of the blade positioning column set and the column axis of the magnet positioning column set are arranged in parallel, and the blade positioning column set penetrates through the metal magnetic conductive iron core. The blade positioning column set, the magnet positioning column set and the plastic base part of the driving iron core assembly are all plasticized, and compared with a traditional design structure integrally formed by die casting of metal materials, the positioning column structure designed by the invention is higher in precision, so that the problem that the manufacturing precision of the positioning column is low is solved.

Description

Drive core assembly for shutter mechanism and shutter mechanism Technical Field

[0001] This invention relates to the field of infrared camera technology, specifically to a drive core assembly for a shutter device and a shutter device. Background Technology

[0002] In precision optical equipment such as camera modules and security monitoring systems, the shutter mechanism is a core component for achieving precise exposure control. A traditional shutter mechanism typically includes a housing base with a shutter window and a shutter blade assembly that opens and closes the shutter window via rotation. To ensure coordinated and stable rotation of multiple shutter blades, several positioning posts are usually provided on the housing base. These positioning posts serve as the rotation axes of the shutter blades, with the blade ends fitted onto the positioning posts via rotation slots.

[0003] However, in pursuit of structural compactness and ease of assembly, existing technologies commonly employ a design where the multiple positioning posts and the shutter mechanism's housing base are integrally die-cast from a metal material (such as aluminum alloy or zinc alloy). While this integral molding process reduces the number of parts, it also introduces significant precision bottlenecks. The metal die-casting process itself is constrained by factors such as mold wear and uneven material shrinkage, making it difficult to achieve high-precision control of micro-dimensions. This results in inherent deviations in key geometric parameters such as the cylindricity and diameter consistency of the formed positioning posts, as well as the center distance and parallelism between multiple positioning posts.

[0004] It is precisely because of the inherently lower precision resulting from the unibody die-casting process that the theoretical center of rotation in the blade kinematic model cannot precisely coincide with the actual physical center when the shutter blades rotate around these insufficiently precise positioning posts. The direct consequence is that the actual rotation trajectory of the free end of the shutter blades, far from the drive end, deviates significantly from the pre-designed ideal trajectory. This trajectory deviation not only affects the smoothness of the shutter's opening and closing action and the repeatability of positioning accuracy, but in extreme cases, it can also lead to asynchronous blade movement, mutual interference, and even affect the complete sealing or opening of the light-transmitting window, thus limiting the improvement of the overall shutter performance.

[0005] Therefore, how to fundamentally improve the manufacturing precision of the positioning post to accurately constrain the rotation trajectory of the shutter blades, while also taking into account the relative positions, connection relationships, and collaborative working relationships among other components of the shutter mechanism, has become an urgent technical problem to be solved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a drive core assembly for a shutter device and a shutter device.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: In a first aspect, the present invention proposes a driving iron core assembly for a shutter device, the shutter device including a driving iron core assembly, the driving iron core assembly including a metal magnetic core and a plastic base, the metal magnetic core and the plastic base being integrally injection molded; a blade positioning post group and a magnet positioning post group are injection molded on the plastic base, the column axis of the blade positioning post group and the column axis of the magnet positioning post group are arranged parallel to each other, and the blade positioning post group is disposed through the metal magnetic core.

[0008] The beneficial effects of this invention are as follows: by decomposing the traditional one-piece die-cast drive core assembly into two parts, a metal magnetic core and a plastic base, and separating the traditional one-piece die-cast positioning post from the device base, and plasticizing the positioning post used to position the rotation center of the shutter blade opening and closing, and the positioning post used to position the rotation center of the magnetic crank component, the blade positioning post assembly and the magnetic positioning post assembly are injection molded on the plastic base. Compared to traditional die-cast metal structures, this invention separates the drive core assembly into a metal magnetic core and a plastic base. This allows the metal drive core assembly to contact the coil, ensuring that energizing the coil generates the driving force to rotate the magnetic rocker arm. Furthermore, the magnetic positioning posts for positioning the shutter blades and the magnetic rocker arm are integrally molded onto the plastic base using injection molding. Compared to traditional die-cast metal structures, the plasticized blade and magnetic positioning post assemblies of this invention offer higher axis accuracy, and the injection molding process is simpler and less costly than die-cast metal molding. Furthermore, when the axis accuracy of the blade positioning post group and the magnet positioning post group is effectively improved, the actual rotation trajectory of the magnet rocker arm driven by magnetic force can coincide with the pre-designed rotation trajectory. Similarly, the magnet rocker arm rotating according to the pre-designed trajectory, combined with the high-precision positioning posts, ensures that the shutter blades can also coincide with the pre-designed rotation trajectory when the magnet rocker arm drives the shutter blades to rotate. This improves the accuracy of the positioning post structure and guarantees the rotation accuracy of the shutter blades. In other words, this invention, through the structural design of the plastic base, blade positioning post group, and magnet positioning post group, not only improves the rotation accuracy of the shutter blades and the magnet rocker arm but also simultaneously satisfies the relative position, connection relationship, and collaborative working relationship with other components of the shutter device, ensuring the stable operation of the shutter device.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the blade positioning post assembly includes a first blade positioning post and a second blade positioning post whose column axes are parallel to each other; the metal magnetic core is provided with a first positioning hole and a second positioning hole, and the first blade positioning post and the second blade positioning post are respectively disposed through the first positioning hole and the second positioning hole.

[0011] The beneficial effects of adopting the above-mentioned further solution are as follows: By integrally molding the first blade positioning post and the second blade positioning post with the plastic base through injection molding, the blade positioning post used in this invention has higher precision compared to the traditional positioning post integrally die-cast from metal. Simultaneously, by opening a first positioning hole and a second positioning hole on the metal magnetic core for the first and second blade positioning posts to pass through, the metal magnetic core and the plastic base are connected in series through the blade positioning posts, improving the connection stability between the two. Furthermore, after the first and second blade positioning posts pass through the metal magnetic core, their upper parts form a rotating shaft for the shutter blades to rotate. The lower part of the blade positioning post can be wrapped with the metal magnetic core, improving the overall structural stability of the blade positioning post.

[0012] Furthermore, the blade positioning post assembly also includes a first limiting block, which is disposed on the upper end face of the metal magnetic core; the first blade positioning post and the second blade positioning post are respectively located at both ends of the first limiting block, and the two ends of the first limiting block are respectively injection molded and integrally connected to the first blade positioning post and the second blade positioning post.

[0013] The beneficial effects of adopting the above-mentioned further solution are as follows: By integrally molding the first limiting block on the upper end face of the metal magnetic core, the metal magnetic core can be limited, thereby improving the structural tightness between the metal magnetic core and the plastic base. Simultaneously, by having the first blade positioning post and the second blade positioning post located at opposite ends of the first limiting block and manufactured using integral injection molding, the first limiting block can wrap around the middle of the blade positioning post, improving the overall structural stability of the blade positioning post.

[0014] Furthermore, a magnetic rotating groove is formed at one end of the plastic base; the magnetic positioning post group is a magnetic crank positioning post located in the magnetic rotating groove, the column axis of the magnetic crank positioning post is parallel to the column axis of the blade positioning post group, and the magnetic crank positioning post and the plastic base are integrally injection molded.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: By injection molding a magnetic rotation groove at one end of the plastic base, and injection molding a magnetic crank positioning post for rotating the magnetic crank arm into the magnetic rotation groove, the magnetic crank positioning post of the present invention has higher precision compared to the traditional positioning post made of metal material in one piece by die casting. At the same time, by improving the manufacturing precision of the positioning post for rotating the magnetic crank arm, a precise collision position is provided when driving the shutter blades to rotate, thereby ensuring that the rotation trajectory of the shutter blades coincides with the preset trajectory.

[0016] Furthermore, multiple limiting posts are injection molded on the plastic base, and multiple limiting through holes are opened on the metal magnetic core, with the limiting posts installed in the limiting through holes.

[0017] The beneficial effect of adopting the above-mentioned further solution is that by injection molding multiple limiting posts on the upper end face of the plastic base, and combining the limiting through holes that penetrate the upper and lower end faces on the metal magnetic core, the limiting posts can be installed in the limiting through holes to limit the horizontal relative position of the metal magnetic core and the plastic base, thus avoiding misalignment.

[0018] Furthermore, the end of the limiting post is injection molded to form a limiting disk, and the limiting disk is located on the upper end face of the metal magnetic core.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by injection molding a limiting disc at the end of the limiting post located on the upper end face of the metal magnetic core, the vertical relative position of the metal magnetic core and the plastic base can be limited, thus avoiding gaps.

[0020] Furthermore, the metal magnetic core is provided with a wiring portion; the plastic base is injection molded to form a connecting portion corresponding to the wiring portion, the connecting portion is provided with a connecting through hole, and the wiring portion passes through the connecting through hole.

[0021] The beneficial effect of adopting the above-mentioned further solution is that by injection molding to form a connecting structure with a connecting part and a connecting hole for the wire part to pass through, the stability of the connection structure between the metal magnetic core and the plastic base is improved.

[0022] Furthermore, the two ends of the connecting part are injection molded to form limiting protrusions, and a clamping groove is formed in the middle; a coil component is sleeved on the driving iron core assembly, the coil component is located in the clamping groove, and both ends of the coil component abut against the limiting protrusions.

[0023] The beneficial effects of adopting the above-mentioned further solution are as follows: By injection molding limiting protrusions at both ends of the connection portion, and forming clamping grooves for winding the coil, the clamping grooves provide a winding clamping structure for the coil, effectively avoiding the problem of the coil directly penetrating the metal magnetic core and causing abnormal insulation withstand voltage, thus enabling automated production of winding. Furthermore, using the coil to wind the metal magnetic core and the plastic base further improves the tightness of the connection structure between the metal magnetic core and the plastic base.

[0024] Furthermore, a connecting groove is formed on one side of the connecting part by injection molding, and the portion of the coil component passing through the connecting groove is in contact with the metal magnetic core.

[0025] The beneficial effect of adopting the above-mentioned further solution is that by forming a connecting groove on one side of the connection part, sufficient contact surface can be provided for direct contact between the metal magnetic core and the coil component. This ensures the connection stability between the coil component and the metal magnetic core, and avoids the problem of the coil component directly penetrating the metal magnetic core and causing abnormal insulation withstand voltage.

[0026] Secondly, the present invention also proposes a shutter device, including a drive core assembly for the shutter device, and further including a magnet rocker arm, a device base and a blade assembly. The drive core assembly is fixedly connected to the device base, and the blade assembly and the magnet rocker arm are rotatably connected to the drive core assembly.

[0027] The beneficial effects of this invention are as follows: By using a metal magnetic core and a plastic base, and injection molding a blade positioning post assembly for positioning and rotating the blade assembly, and a magnet positioning post assembly for positioning and rotating the magnetic rocker arm, this invention improves the precision of the positioning post structure and ensures the rotational accuracy of the magnetic rocker arm and shutter blades compared to the traditional metal die-casting structure design. Simultaneously, by separating the drive core assembly into a metal magnetic core and a plastic base, and using a structure where both the blade positioning post assembly and the magnet positioning post assembly are integrally injection molded with the plastic base, the relative positions, connections, and collaborative working relationships between the drive core assembly and other components of the shutter device are satisfied, ensuring the stable operation of the shutter device. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the drive core assembly of the present invention; Figure 3 is an exploded view of the present invention; Figure 4 is a schematic diagram of the drive core assembly and the blade assembly in the present invention; Figure 5 is a schematic diagram of the drive core assembly and the shutter blade group in the closed state in the present invention; Figure 6 is a schematic diagram of the drive core assembly and the shutter blade group in the open state in the present invention; Figure 7 is an exploded view of the coil component and the drive core assembly in the present invention; Figure 8 is a schematic diagram of the shutter blade group in the present invention.

[0030] The components represented by each number in the attached diagram are listed below: 100, Drive core assembly; 200, Magnet crank handle; 201, Magnet crank handle body; 202, Rocker arm; 300, Device base; 301, Shutter window; 302, Mounting ring groove; 303, Locking hole; 304, Buffer cotton block; 400, Blade assembly; 410, Shutter blade group; 401, First shutter blade; 402, Second shutter blade; 403, First rotating hole; 404, Second rotating hole; 405, First linkage hole; 406, Second linkage hole; 407, Rotation notch; 500, Flexible connecting plate; 501, Connecting round hole; 10, Metal magnetic core; 11, First metal segment; 111, First positioning hole. ; 112, Second positioning hole; 113, Limiting through hole; 12, Second metal segment; 121, Wiring part; 20, Plastic base; 21, Blade positioning post assembly; 211, First blade positioning post; 212, Second blade positioning post; 213, First limiting block; 22, Magnet positioning post assembly; 221, Magnet crank positioning post; 23, First plastic segment; 231, Inclined end; 232, Magnet rotating groove; 233, Circular protrusion; 24, Limiting post; 241, Limiting disc; 25, Second plastic segment; 251, Connecting part; 252, Connecting through hole; 253, Limiting protrusion; 254, Clamping groove; 255, Connecting groove surface; 26, Connecting arm; 27, Connecting post; 30, Coil component. Detailed Implementation

[0031] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0032] Referring to Figures 1-8, this invention provides a drive core assembly for a shutter device. The shutter device includes a drive core assembly 100, which comprises a metal magnetic core 10 and a plastic base 20. The metal magnetic core 10 and the plastic base 20 are integrally injection molded. A blade positioning post assembly 21 and a magnet positioning post assembly 22 are injection molded on the plastic base 20. The axis of the blade positioning post assembly 21 and the axis of the magnet positioning post assembly 22 are parallel to each other. The blade positioning post assembly 21 passes through the metal magnetic core 10.

[0033] In this embodiment, referring to Figures 3-8, the shutter device includes two sets of drive core assemblies 100 arranged opposite each other and forming a U-shape. Each set of drive core assemblies 100 includes a metal magnetic core 10 and a plastic base 20. Both the metal magnetic core 10 and the plastic base 20 are L-shaped. Specifically, the metal magnetic core 10 includes a first metal segment 11 and a second metal segment 12 perpendicularly connected to the first metal segment 11. The plastic base 20 includes a first plastic segment 23 and a second plastic segment 25 perpendicularly connected to the first plastic segment 23. The metal magnetic core 10 is positioned above and abuts against the plastic base 20, and the metal magnetic core 10 and the plastic base 20 partially overlap. Specifically, the metal magnetic core 10 is made of a metal material with good magnetic permeability and is used to form part of the electromagnetic drive circuit, cooperating with the coil 30 to generate a magnetic field that drives the magnetic rocker arm 200 to rotate. The plastic base 20 is made of engineering plastic through injection molding. Optionally, the engineering plastic can be an insulating material with a certain strength, such as PBT, POM, or nylon. More specifically, the metal magnetic core 10 and the plastic base 20 are integrally connected through an insert injection molding process. It should be understood that during the injection molding of the plastic base 20, the pre-processed metal magnetic core 10 is placed as an insert into the mold, allowing the molten plastic material to wrap, fill, and solidify in specific areas of the metal magnetic core 10, forming a strong mechanical connection and electrical insulation.

[0034] More specifically, on the first plastic segment 23 of the plastic base 20, the blade positioning post assembly 21 and the magnetic positioning post assembly 22 are directly formed through the same injection molding process. During molding, the column portion of the blade positioning post assembly 21 passes through pre-set holes in the first metal segment 11 of the metal magnetic core 10, thus forming a cross connection with the metal portion and enhancing the overall structural stability. The blade positioning post assembly 21 provides a high-precision rotation fulcrum for the blade assembly 400, while the magnetic positioning post assembly 22 provides a high-precision rotation center for the magnetic crank component. The injection-molded structure ensures the structural precision requirement that the column axes of the blade positioning post assembly 21 and the magnetic positioning post assembly 22 are parallel to each other.

[0035] In addition, this invention decomposes the traditionally die-cast drive core assembly 100 into two functional areas: a metal magnetic core 10 and a plastic base 20, which are then integrated through injection molding. Furthermore, it separates the traditionally die-cast positioning posts from the device base 300, while using an injection molding connection to place the positioning posts on the plastic base 20. Firstly, compared to traditional structural designs, the blade positioning post assembly 21 and the magnet positioning post assembly 22 of this invention are made of plastic and injection-molded using high-precision molds. This allows for consistent cylindricity and diameter of the posts, resulting in higher tolerance control for key dimensions such as parallelism and spacing between multiple posts compared to metal die-casting. This fundamentally solves the problem of blade rotation trajectory deviation caused by low precision in metal die-casting. Secondly, this invention ensures efficient and stable electromagnetic driving force for the magnetic rocker arm 200 through the structural cooperation between the metal magnetic core 10 and the coil component 30. Furthermore, the high-precision injection molding of the plastic base 20, blade positioning post assembly 21, and magnetic positioning post assembly 22 ensures precise transmission of driving force and accurate constraint of the motion trajectory. Thirdly, the injection molding process is simpler, has a shorter cycle time, and lower cost than metal die casting, and is suitable for mass production with better consistency.

[0036] Preferably, referring to Figures 4-7, the blade positioning post group 21 includes a first blade positioning post 211 and a second blade positioning post 212 with their column axes arranged parallel to each other; the metal magnetic core 10 is provided with a first positioning hole 111 and a second positioning hole 112, and the first blade positioning post 211 and the second blade positioning post 212 are respectively arranged through the first positioning hole 111 and the second positioning hole 112.

[0037] In this embodiment, the blade positioning post assembly 21 specifically includes a first blade positioning post 211 and a second blade positioning post 212 with their axis lines parallel to each other. Both the first blade positioning post 211 and the second blade positioning post 212 are located in the first plastic segment 23. Correspondingly, a first positioning hole 111 and a second positioning hole 112 are pre-machined or stamped on the metal magnetic core 10. Both the first positioning hole 111 and the second positioning hole 112 are located in the first metal segment 11. During injection molding, the mold core passes through these holes, so that the molded first blade positioning post 211 and the second blade positioning post 212 respectively pass through the first positioning hole 111 and the second positioning hole 112.

[0038] It should be explained that the precise positioning of the first blade positioning post 211 and the second blade positioning post 212, integrally formed with the plastic base 20, provides two precise rotational constraint points for the shutter blades, with an accuracy far exceeding that of traditional metal posts. Simultaneously, the design of the two positioning posts penetrating the metal base acts like a "pin," firmly connecting the metal and plastic parts together, significantly improving the overall structural rigidity and connection reliability of the assembly. Furthermore, the metal magnetic core 10 wrapping around the lower section of the positioning posts also acts as a reinforcing rib, enhancing the positioning posts' resistance to bending deformation.

[0039] Preferably, referring to FIG7, the blade positioning post assembly 21 further includes a first limiting block 213, the first limiting block 213 being disposed on the upper end face of the metal magnetic core 10; the first blade positioning post 211 and the second blade positioning post 212 are respectively located at both ends of the first limiting block 213, and both ends of the first limiting block 213 are respectively injection molded and integrally connected to the first blade positioning post 211 and the second blade positioning post 212.

[0040] In this embodiment, the upper surface region of the metal magnetic core 10 is injection molded onto the plastic base 20 to form a first limiting block 213. The first blade positioning post 211 and the second blade positioning post 212 are located at opposite ends of the length of the first limiting block 213. During the injection molding process, the plastic material simultaneously fills the cavity of the first limiting block 213 and the cavities of the first blade positioning post 211 and the second blade positioning post 212, so that the two ends of the first limiting block 213 are connected to the first blade positioning post 211 and the second blade positioning post 212 by the plastic material, forming an integral structure.

[0041] It needs to be explained that the structure of the first limiting block 213 forms a plastic connection and support structure on the upper surface of the metal magnetic core 10. The first limiting block 213 not only restricts the minute displacement between the metal magnetic core 10 and the plastic base 20, making their connection tighter and eliminating potential gaps, but also forms a reinforcing structure connecting the first blade positioning post 211 and the second blade positioning post 212 at their midpoint. This strengthens the structural connection between the two positioning posts, preventing relative displacement or deformation of the first blade positioning post 211 and the second blade positioning post 212 under stress, thereby further ensuring the long-term stability of the shutter blade rotation axis position defined by these two positioning posts.

[0042] Preferably, referring to Figure 7, one end of the plastic base 20 forms a magnetic rotating groove 232; the magnetic positioning post group 22 is a magnetic crank positioning post 221 disposed in the magnetic rotating groove 232, the column axis of the magnetic crank positioning post 221 is parallel to the column axis of the blade positioning post group 21, and the magnetic crank positioning post 221 and the plastic base 20 are integrally injection molded.

[0043] In this embodiment, referring to Figure 7, the plastic base 20 has a recessed, circular magnetic rotating groove 232 formed at one end by injection molding. Specifically, the end of the first plastic segment 23 away from the second plastic segment 25 is inclined inward to form an inclined end 231, and the magnetic rotating groove 232 is located at the inclined end 231. The magnetic positioning post group 22 is specifically a magnetic crank positioning post 221 located at the center of the magnetic rotating groove 232, and the column axis of the magnetic crank positioning post 221 is parallel to the column axes of the first blade positioning post 211 and the second blade positioning post 212. The magnetic crank positioning post 221 and the plastic base 20 are integrally formed during the injection molding process.

[0044] It needs to be explained that the magnet rotation slot 232 provides space for the magnet crank assembly to accommodate and rotate. Integrating the magnet crank positioning post 221 onto the plastic base 20 and using injection molding gives it the same high precision as the blade positioning post, thereby improving the rotation center accuracy of the drive structure's magnet crank assembly itself. The high-precision drive center, combined with the high-precision blade rotation fulcrum (blade positioning post), ensures the accuracy of the entire chain from drive input to motion output, allowing the actual movement trajectory of the shutter blades to highly coincide with the preset theoretical trajectory.

[0045] In some embodiments, referring to FIG7, the magnet rotating slot 232 is provided with an annular protrusion 233 centered on the magnet rocker arm positioning post 221. The annular protrusion 233 is used to limit the bottom of the magnet rocker arm 200 and at the same time improve the stability of the connection structure between the magnet rocker arm 200 and the plastic base 20.

[0046] Preferably, referring to Figure 7, a plurality of limiting posts 24 are injection molded on the plastic base 20, and a plurality of limiting through holes 113 are opened on the metal magnetic core 10, and the limiting posts 24 are installed in the limiting through holes 113.

[0047] In this embodiment, two limiting posts 24 are injection molded onto the first plastic segment 23 of the plastic base 20. Simultaneously, two limiting holes 113 are machined at corresponding positions on the first metal segment 11 of the metal magnetic core 10. During injection molding, the plastic material fills to form the limiting posts 24. After demolding, these limiting posts 24 are installed within the limiting holes 113, forming a tight fit.

[0048] It needs to be explained that the cooperation between the limiting post 24 and the limiting through hole 113 plays a precise positioning and limiting role in the horizontal plane (XY direction) for the relative position of the metal magnetic core 10 and the plastic base 20, preventing lateral displacement of the two during subsequent use or under force, and ensuring that the reference position of the high-precision positioning post group formed by the plastic part relative to the metal part remains unchanged.

[0049] Preferably, referring to FIG7, the end of the limiting post 24 is injection molded to form a limiting disk 241, and the limiting disk 241 is located on the upper end face of the metal magnetic core 10.

[0050] In this embodiment, the limiting post 24 is located at one end of the upper surface of the metal magnetic core 10, and a limiting disk 241 with a diameter larger than the post body is formed by injection molding. After molding, the limiting disk 241 is exactly located above the upper surface of the metal magnetic core 10 and abuts against the upper surface.

[0051] It needs to be explained that the limiting disc 241 forms a "shoulder" structure. The limiting disc 241 abuts against the upper surface of the metal magnetic core 10, limiting the metal magnetic core 10 in the vertical direction (Z direction) to prevent the metal magnetic core 10 from detaching upward relative to the plastic base 20 or creating a vertical gap. Combined with the horizontal limiting structure of the limiting post 24 and the limiting through hole 113, the metal magnetic core 10 and the plastic base 20 are reliably positioned and secured in all directions in three-dimensional space.

[0052] Preferably, referring to Figure 7, the metal magnetic core 10 is provided with a wiring portion 121; the plastic base 20 is injection molded to form a connecting portion 251 corresponding to the wiring portion 121, the connecting portion 251 is provided with a connecting through hole 252, and the wiring portion 121 is disposed through the connecting through hole 252.

[0053] In this embodiment, the upper part of the second metal segment 12 of the metal magnetic core 10 is tapered to form a wiring portion 121, which is used for subsequent connection with an external circuit. On the second plastic segment 25 of the plastic base 20, corresponding to the position of the wiring portion 121, a connecting portion 251 is injection molded. This connecting portion 251 has a connecting through hole 252 arranged along the length of the second plastic segment 25. During the insert injection molding process, the wiring portion 121 of the metal magnetic core 10 passes through the connecting through hole 252, so that the wiring portion 121 is encapsulated and fixed by the plastic.

[0054] It should be explained that the connecting part 251 and its connecting through hole 252 provide a robust plastic support and insulating protective sleeve for the wiring part 121 of the metal magnetic core 10. This not only improves the reliable insulation of the metal conductive part of the wiring part 121 from the external environment, meeting electrical safety requirements, but also strengthens the mechanical connection point between the metal magnetic core 10 and the plastic base 20.

[0055] Preferably, referring to Figure 7, the two ends of the connecting part 251 are injection molded to form limiting protrusions 253, and a clamping groove 254 is formed in the middle; a coil component 30 is sleeved on the driving iron core assembly 100, the coil component 30 is disposed in the clamping groove 254, and both ends of the coil component 30 abut against the limiting protrusions 253.

[0056] In this embodiment, the connecting portion 251 has raised limiting protrusions 253 injection molded at both ends along its length, thereby forming a clamping groove 254 in the area between the two limiting protrusions 253. A coil component 30 (i.e., excitation coil) is sleeved on the drive core assembly 100. During assembly, the winding skeleton or directly wound coil of the coil component 30 is placed in the clamping groove 254, and the two end faces of the coil component 30 abut against the inner surfaces of the two limiting protrusions 253 respectively.

[0057] It should be explained that the clamping slot 254 and the limiting protrusion 253 together provide a precise mounting and positioning structure for the coil component 30, simplifying the coil assembly process and ensuring the accurate relative position of the coil and the metal magnetic core 10. This design avoids the need for the coil coil to be directly wound around the metal magnetic core 10, effectively solving the problems of insulation layer being cut and withstand voltage test abnormalities that may occur in traditional structures. At the same time, the tightly wound coil component 30 itself also exerts a certain clamping force on the metal magnetic core 10 and the plastic base 20 below, further improving the overall assembly tightness. In addition, the standardized clamping slot 254 facilitates the automated winding and assembly of the coil.

[0058] Preferably, referring to FIG7, a connecting groove surface 255 is formed by injection molding on one side of the connecting part 251, and the coil component 30 is in contact with the metal magnetic core 10 through the connecting groove surface 255.

[0059] In this embodiment, a connecting groove surface 255 is formed on the inner side of the connecting portion 251 by injection molding. When the coil component 30 is installed in the clamping slot 254, the portion of the coil passing through the connecting groove surface 255 can achieve a large-area, smooth contact connection with the exposed metal magnetic core 10 surface.

[0060] It needs to be explained that the structural design of the connecting groove surface 255 ensures that there is a sufficient and controllable contact area between the coil component 30 and the wiring portion 121 of the metal magnetic core 10.

[0061] By forming a connecting groove 255 on one side of the connecting part 251, sufficient contact surface can be provided for direct contact between the metal magnetic core 10 and the coil component 30. This ensures the connection stability between the coil component 30 and the metal magnetic core 10, and avoids the problem of the coil component 30 directly penetrating the metal magnetic core 10, which would cause abnormal insulation withstand voltage.

[0062] In some embodiments, referring to Figures 2-7, a connecting arm 26 is injection molded onto the limiting protrusion 253, and the connecting arm 26 is located on the back side of the connecting groove surface 255. Specifically, the shutter device also includes a flexible connecting plate 500, on which a connecting circular hole 501 corresponding to the connecting arm 26 is opened. The connecting arm 26 is disposed through the connecting circular hole 501 to support the connection end between the flexible connecting plate 500 and the coil component 30, preventing the welding point or connection point of the two from breaking due to excessive force.

[0063] Based on Embodiment 1, and referring to Figures 3-8, the present invention also proposes a shutter device, including a drive core assembly 100 for the shutter device, a magnet rocker arm 200, a device base 300, and a blade assembly 400. The drive core assembly 100 is fixedly connected to the device base 300, and the blade assembly 400 and the magnet rocker arm 200 are rotatably connected to the drive core assembly 100.

[0064] In this embodiment, referring to Figures 3-8, the shutter device includes two sets of drive core assemblies 100 as described in Embodiment 1, as well as two magnetic cranks, a device base 300, and a blade assembly 400 that are matched with the drive core assemblies 100. Specifically, the bottom of the plastic base 20 is injection molded to form two connecting posts 27, which are located at the bottom ends of the first plastic segment 23 and the second plastic segment 25, respectively. A rectangular shutter window 301 is provided in the middle of the device base 300. A U-shaped mounting groove 302, adapted to the two sets of drive core assemblies 100, is formed around the shutter window 301. Four locking holes 303, adapted to the connecting posts 27, are provided at the bottom of the mounting groove 302. The connecting posts 27 are installed in the locking holes 303, so that the two sets of drive core assemblies 100 are fixedly installed in the mounting groove 302 in a U-shape, forming a U-shaped hollow area in the middle. In addition, both the blade assembly 400 and the magnetic rocker arm 200 are located above the drive core assembly 100. The blade assembly 400 is positioned at the shutter window 301, with one end rotatably mounted on the blade positioning post group 21, and the other end used to open and close the shutter window 301. The magnetic rocker arm 200 is positioned at the magnetic rotation slot 232 of the plastic base 20 and is rotatably fitted onto the magnetic positioning post group 22. Its rotation can drive the blade assembly 400 to rotate around the blade positioning post group 21, thereby realizing the opening and closing action of the shutter window 301. Specifically, the blade assembly 400 includes two sets of shutter blade groups 410 that are matched with the drive core assembly 100. Among them, one set of blade assembly 400 can be used as a single unit. The shutter window 301 is opened and closed by half. The shutter blade group 410 includes a first shutter blade 401 and a second shutter blade 402 arranged parallel to each other. The first shutter blade 401 and the second shutter blade 402 are both U-shaped. The first shutter blade 401 is located above the second shutter blade. More specifically, the first shutter blade 401 and the second shutter blade 402 are respectively provided with a first rotating hole 403 and a second rotating hole 404 at the same end. The first rotating hole 403 and the second rotating hole 404 are staggered. The upper part of the first blade positioning post 211 passes through the first rotating hole 403 and the upper part of the second blade positioning post 212 passes through the second rotating hole 404.The first shutter blade 401 and the second shutter blade 402 are respectively provided with a first linkage hole 405 and a second linkage hole 406 at the same end. The first linkage hole 405 and the second linkage hole 406 are approximately overlapped. At the same time, the magnetic rocker arm 200 includes a magnetic rocker arm body 201 rotatably mounted on the magnetic rocker arm positioning post 221 and a rocker arm 202 provided on the edge of the magnetic rocker arm body 201. When the magnetic rocker arm body 201 is driven to rotate by electromagnetic force, the rocker arm 202 can rotate around the magnetic rocker arm body 201. The upper end of the rocker arm 202 passes through the second linkage hole 406 and the first linkage hole 405 in sequence, thereby driving the same end of the first shutter blade 401 and the second shutter blade 402 to rotate around the first blade positioning post 211 and the second blade positioning post 212 respectively. Finally, it drives the other end of the first shutter blade 401 and the second shutter blade 402 to rotate, thereby opening and closing half of the area of ​​the shutter window 301. The opening and closing of the shutter window 301 is achieved by combining another set of blade assemblies 400 and drive core assembly 100.

[0065] In some embodiments, referring to FIG8, one end of the first shutter blade 401 is recessed to form a rotation notch 407. The first shutter blade 401 uses the rotation notch 407 to avoid the second blade positioning post 212, thereby ensuring the parallel rotational stability of the first shutter blade 401 and the second shutter blade 402.

[0066] In some embodiments, referring to FIG3, four buffer cotton blocks 304 are provided on the inner wall of the device base 300. The buffer cotton blocks 304 are installed above the annular groove 302 and cover the rotation plane of the first shutter blade 401 and the second shutter blade 402. They are used to buffer the shutter blades in the open state and prevent the shutter blades from directly colliding with the device base 300 and causing damage.

[0067] By employing the drive core assembly 100 in Embodiment 1, the shutter device achieves higher motion accuracy. The high-precision magnetic positioning post assembly 22 ensures accurate rotation trajectory of the magnetic crank, while the high-precision blade positioning post assembly 21 ensures accurate rotation fulcrum of the shutter blades. The combination of these two ensures that the actual movement trajectory of the blades closely matches the designed trajectory during the entire shutter opening and closing action, solving problems such as trajectory deviation, sluggish movement, and poor sealing caused by the low precision of die-cast metal positioning posts in traditional structures. Simultaneously, the structural design, where both the blade positioning post assembly 21 and the magnetic positioning post assembly 22 are integrally injection molded with the plastic base 20, satisfies the relative positions, connection relationships, and collaborative working relationships between the drive core assembly 100 and other components of the shutter device, ensuring stable operation of the shutter device.

[0068] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A drive core assembly for a shutter device, the shutter device comprising a drive core assembly, characterized in that, The drive core assembly includes a metal magnetic core (10) and a plastic base (20). The metal magnetic core (10) and the plastic base (20) are integrally molded together. A blade positioning post group (21) and a magnet positioning post group (22) are injection molded on the plastic base (20). The column axis of the blade positioning post group (21) and the column axis of the magnet positioning post group (22) are arranged parallel to each other. The blade positioning post group (21) passes through the metal magnetic core (10).

2. The drive core assembly for the shutter device according to claim 1, characterized in that, The blade positioning post assembly (21) includes a first blade positioning post (211) and a second blade positioning post (212) with their axes parallel to each other; the metal magnetic core (10) is provided with a first positioning hole (111) and a second positioning hole (112), and the first blade positioning post (211) and the second blade positioning post (212) are respectively arranged through the first positioning hole (111) and the second positioning hole (112).

3. The drive core assembly for the shutter device according to claim 2, characterized in that, The blade positioning post assembly (21) further includes a first limiting block (213), which is located on the upper end face of the metal magnetic core (10). The first blade positioning post (211) and the second blade positioning post (212) are located at the two ends of the first limiting block (213), and the two ends of the first limiting block (213) are injection molded and integrally connected to the first blade positioning post (211) and the second blade positioning post (212).

4. The drive core assembly for the shutter device according to claim 1, characterized in that, One end of the plastic base (20) forms a magnetic rotating groove (232); the magnetic positioning post group (22) is a magnetic crank positioning post (221) located in the magnetic rotating groove (232). The column axis of the magnetic crank positioning post (221) is parallel to the column axis of the blade positioning post group (21). The magnetic crank positioning post (221) and the plastic base (20) are integrally injection molded.

5. The drive core assembly for the shutter device according to claim 1, characterized in that, Multiple limiting posts (24) are injection molded on the plastic base (20), and multiple limiting holes (113) are opened on the metal magnetic core (10). The limiting posts (24) are installed in the limiting holes (113).

6. The drive core assembly for the shutter device according to claim 5, characterized in that, The end of the limiting post (24) is injection molded to form a limiting disk (241), which is located on the upper surface of the metal magnetic core (10).

7. The drive core assembly for the shutter device according to claim 1, characterized in that, The metal magnetic core (10) is provided with a wiring part (121); the plastic base (20) is injection molded to form a connecting part (251) corresponding to the wiring part (121), the connecting part (251) is provided with a connecting hole (252), and the wiring part (121) is provided through the connecting hole (252).

8. The drive core assembly for the shutter device according to claim 7, characterized in that, The two ends of the connecting part (251) are injection molded to form limiting protrusions (253), and a clamping groove (254) is formed in the middle; a coil component (30) is sleeved on the driving iron core assembly, the coil component (30) is located in the clamping groove (254), and both ends of the coil component (30) abut against the limiting protrusions (253).

9. The drive core assembly for the shutter device according to claim 8, characterized in that, A connecting groove (255) is formed on one side of the connecting part (251) by injection molding, and the coil part (30) is in contact with the metal magnetic core (10) through the connecting groove (255).

10. A shutter device, characterized in that, The device includes a drive core assembly for a shutter device as described in any one of claims 1-9, and further includes a magnet rocker arm, a device base, and a blade assembly. The drive core assembly is fixedly connected to the device base, and the blade assembly and the magnet rocker arm are rotatably connected to the drive core assembly.

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