Counterweight with shielding function

Abstract

The utility model discloses a counter weight with shielding function, include: counter weight body and pin, pin is fixed in the upper end surface of counter weight body, and pin includes a plurality of shielding pins and a plurality of support pins, and shielding pin is flat strip structure, and its section is rectangular structure, and shielding pin includes edge shielding pin and sealing shielding pin, and edge shielding pin is along the edge distribution of the first side, second side and third side of counter weight body, and a plurality of edge shielding pins form a semi -closed shielding pin area, and sealing shielding pin is fixed in the opening of shielding pin area, so that edge shielding pin and sealing shielding pin form a closed shielding pin area, and edge shielding pin is located in the center of counter weight body, and support pin is cylindrical structure, and the height of support pin and shielding pin is same, and support pin is fixed in the opposite two side angle point of the fourth side of counter weight body, and counter weight body and pin are integrally formed.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment structural design technology, and specifically relates to a counterweight with shielding function. Background Technology

[0002] With the rapid development of wireless communication technology, radio frequency (RF) signals are increasingly widely used in smart homes, the Internet of Things (IoT), wireless data acquisition, and remote monitoring. Various electronic devices commonly integrate wireless modules (such as Wi-Fi, Bluetooth, and 5G), operating at high frequencies and with fast data transmission rates, leading to increasingly complex internal electromagnetic environments. To prevent electromagnetic interference (EMI) generated by high-frequency circuits from affecting surrounding weak-signal circuits (such as analog signal processing circuits and ADC / DAC modules), metal shielding is typically used to provide enclosed electromagnetic isolation for critical circuit areas. The shielding is generally made of conductive metal and is soldered to the ground network of the printed circuit board (PCB) via its legs, forming a Faraday cage effect that effectively blocks mutual interference between internal and external electromagnetic waves.

[0003] Meanwhile, in the design of miniaturized and thinner electronic products, metal counterweights are often installed at specific locations on the PCB to ensure structural stability and center of gravity balance during operation. In existing technologies, shielding and counterweight functions are implemented by independent components: the shielding cover is dedicated to electromagnetic protection, while the counterweight is used for mass adjustment. These belong to different functional modules and require separate design, procurement, processing, and assembly, leading to a complex bill of materials (BOM), an increase in the types of components, and an increase in assembly steps. This not only increases the overall manufacturing cost but also occupies valuable PCB layout space, hindering further miniaturization and integration. Furthermore, the introduction of multiple independent metal components may introduce additional structural interference risks and assembly errors. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a counterweight with shielding function. By providing a new counterweight structure that integrates counterweight and electromagnetic shielding functions, it aims to achieve the unity of functional integration, structural compactness and manufacturing economy.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: A counterweight with shielding function includes: a counterweight body and pins. The pins are fixed to the upper surface of the counterweight body. The pins include multiple shielding pins and multiple supporting pins. The shielding pins are flat strip-shaped structures with rectangular cross-sections. The shielding pins include edge shielding pins and sealing shielding pins. The edge shielding pins are distributed along the edges of the first, second, and third sides of the counterweight body. Multiple edge shielding pins form a semi-closed shielding pin area. The sealing shielding pins are fixed at the opening of the shielding pin area so that the edge shielding pins and the sealing shielding pins form a closed shielding pin area. The edge shielding pins are located in the center of the counterweight body. The supporting pins are cylindrical structures with the same height as the shielding pins. The supporting pins are fixed at the opposite corner points of the fourth side of the counterweight body. The counterweight body and the pins are integrally formed.

[0006] Compared to existing technologies, the advantages of this invention are as follows: This invention provides a counterweight structure that integrates mass counterweight and electromagnetic shielding functions. By integrating shielding pins and support pins into the counterweight body, and through designing their structure and position, the shielding pins, with their rectangular cross-section and located in the central area of ​​the counterweight, ensure a large contact area with the PCB pads and a short conductive path, thus improving grounding reliability and shielding continuity. The two cylindrical support pins, positioned at opposite corners of the fourth side, not only provide uniform mechanical support, preventing warping or welding cracks due to weight concentration, but also enhance the overall structural stability under vibration. More importantly, all pins are integrally formed with the counterweight body, ensuring material continuity and electrical conductivity, avoiding the risks of increased contact resistance or loosening caused by separate assembly. This integrated structure also simplifies the production process, reduces the types of components and assembly steps, and lowers material costs and production complexity. It successfully solves the key technical problems of high cost, large space occupation, complex assembly, and complicated BOMs caused by the separate setup of the counterweight and shielding cover in traditional electronic devices. Moreover, the spacing of the shielding pins, the size and cross-sectional shape, and the overall shape can all be flexibly adjusted according to actual needs, giving it good versatility and scalability.

[0007] The aforementioned counterweight, wherein the counterweight body is integrally formed from high-density metal material, is used to provide mass counterweight to adjust the center of gravity balance of electronic equipment.

[0008] In the aforementioned counterweight, the distance between the plurality of shielding pins is 1.5mm to 3mm.

[0009] The aforementioned counterweight has shielding pins with a width of 0.3mm to 0.8mm and a length of 5mm to 10mm. There is a gap between two adjacent shielding pins to avoid signal traces from the PCB that are led out from the shielding pin area, thus preventing short circuits.

[0010] The counterweight described above has a support pin with a diameter of 1.0mm to 2.0mm. The support pin is used to enhance the mechanical strength of the counterweight body and prevent it from loosening or breaking under vibration or impact.

[0011] In the aforementioned counterweight, the pins can be disposed on the side of the counterweight body, and the bottom end face of the pins can be soldered to the corresponding pads on the PCB using surface mount technology.

[0012] In the aforementioned counterweight, the pins can be fixed to the counterweight body by riveting or snapping.

[0013] The shielding pin of the aforementioned counterweight has a polygonal cross-sectional shape.

[0014] The counterweight described above has a body shape that is rectangular, circular, or polygonal.

[0015] The aforementioned counterweight has two support pins. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the counterweight structure according to an embodiment of the present invention;

[0017] The reference numerals are as follows: 100 counterweight body, 200 pin, 210 shielding pin, 211 edge shielding pin, 212 sealing shielding pin, 220 support pin, and 230 enclosed shielding pin area. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below, with reference to Figure 1This utility model provides a counterweight with shielding function, including: a counterweight body 100 and pins 200. The pins 200 are fixed to the upper end face of the counterweight body 100. The pins 200 include multiple shielding pins 210 and multiple support pins 220. The shielding pins 210 have a flat strip structure with a rectangular cross-section. The shielding pins 210 include edge shielding pins 211 and sealing shielding pins 212. The edge shielding pins 211 are distributed along the edges of the first, second, and third sides of the counterweight body 100. The shielding pin 211 forms a semi-enclosed shielding pin area, and the sealing shielding pin 212 is fixed at the opening of the shielding pin area, so that the edge shielding pin 211 and the sealing shielding pin 212 form a closed shielding pin area 230. The edge shielding pin 211 is located in the center of the counterweight body 100. The support pin 220 has a cylindrical structure and the same height as the shielding pin 210. The support pin 220 is fixed at the opposite corner points of the fourth side of the counterweight body 100. The counterweight body 100 and the pin 200 are integrally formed. This utility model provides a counterweight structure that integrates mass counterweight and electromagnetic shielding functions. By integrating the shielding pin 210 and the support pin 220 in the counterweight body 100, and by designing their structure and position, the shielding pin 210 has a rectangular cross-section and is located in the central area of ​​the counterweight body 100, ensuring a large contact area with the PCB pads and a short conductive path, thereby improving grounding reliability and shielding continuity. The two cylindrical support pins 220 are positioned at the opposite corners of the fourth side, providing uniform mechanical support and preventing warping or weld cracking of the counterweight due to concentrated weight. This also enhances the overall structural stability under vibration. More importantly, all pins 200 are integrally formed with the counterweight body 100, ensuring material continuity and electrical conductivity, and avoiding the risks of increased contact resistance or loosening associated with separate assembly. This integrated structure also simplifies the manufacturing process, reduces the types of components and assembly steps, and lowers material costs and production complexity. It successfully solves the key technical challenges of high cost, large space occupation, complex assembly, and cumbersome BOM associated with separate counterweights and shielding covers in traditional electronic devices. Furthermore, the spacing, cross-sectional shape, and overall appearance of the shielding pins 210 can be flexibly adjusted according to actual needs, exhibiting good versatility and scalability.

[0019] Furthermore, this application does not limit the specific location of the shielding pin 210; preferably, refer to... Figure 1The shielding pins 210 are distributed along the first, second, and third sides of the counterweight block 100, forming a semi-enclosed shielding pin area. The open end is then sealed by the sealing shielding pins 212, thus forming a complete closed conductive loop. This structural design allows the counterweight block to achieve traditional center-of-gravity adjustment while simultaneously forming an equivalent metal shield after being connected to the PCB ground network. This effectively surrounds high-frequency signal areas such as the CPU and DDR, suppressing internal electromagnetic radiation leakage and external interference intrusion, thus improving the product's electromagnetic compatibility performance. Furthermore, this application does not limit the specific material of the counterweight block body 100. Preferably, the counterweight block body 100 is integrally molded from high-density metal material to provide mass counterweight for adjusting the center-of-gravity balance of electronic devices. High-density metal material has a high mass per unit volume, providing sufficient weight in a small size. The integral molding process ensures that the entire counterweight block structure has no splicing gaps or welding interfaces, fundamentally eliminating structural breakage or uneven mass distribution caused by material delamination or poor bonding, ensuring mechanical stability during long-term use. When pin 200 is connected to the PCB ground plane, the entire metal body can act as a low-impedance loop to participate in the conduction of shielded current, improving the integrity and efficiency of the Faraday cage effect. Furthermore, refer to... Figure 1 The multiple shielding pins 210 proposed in this application have a certain spacing between them. Of course, this application does not limit the specific value of the spacing. Preferably, the distance between the multiple shielding pins 210 is 1.5mm to 3mm. If the spacing between the pins 210 is too small, it will cause short circuits or require detour wiring, increasing the risk of signal delay and crosstalk. Conversely, if the spacing is too large, the size of the gap in the shielding loop will exceed the safety threshold of λ / 20 (one-twentieth of the wavelength), causing high-frequency electromagnetic waves to leak through the gaps, significantly reducing the shielding effect. The 1.5mm to 3mm range set in this application can effectively suppress electromagnetic radiation in common wireless communication frequency bands, and also provide sufficient exit channels for key traces such as high-speed differential signal lines and clock lines.

[0020] Furthermore, this application does not limit the specific dimensions of the shielding pin 210. Preferably, the width of the shielding pin 210 is 0.3mm to 0.8mm, and the length is 5mm to 10mm. A gap is provided between adjacent shielding pins 210 to avoid signal traces from the shielded pin area 230 on the PCB, preventing short circuits. The width within this range ensures that the pin 210 has sufficient cross-sectional area to carry high-frequency shielding current, reducing AC impedance and improving shielding efficiency; at the same time, it does not excessively encroach on PCB space or increase material costs due to excessive width. The length design is matched to the outer contour of a typical shielded module, enabling it to cover the four edges of critical circuits, forming a complete enclosure structure. Furthermore, this application does not limit the specific dimensions of the support pin 220. Preferably, the diameter of the support pin 220 is 1.0mm to 2.0mm. The support pin 220 is used to enhance the mechanical strength of the counterweight body 100, preventing loosening or breakage under vibration or impact. Cylinders with a diameter less than 1.0mm are prone to bending or shearing failure when subjected to the weight of the counterweight and vibration loads during equipment operation, leading to pin 220 breakage or solder joint detachment, thus affecting the overall shielding continuity. On the other hand, a diameter exceeding 2.0mm significantly increases material usage and PCB footprint, which is not conducive to miniaturization design. A diameter of 1.0mm to 2.0mm ensures sufficient bending stiffness and shear strength while also accommodating standard SMT pad sizes, ensuring a firm solder joint.

[0021] Furthermore, this application does not limit the specific location of the pin 200. Preferably, the pin 200 is fixed on the end face of the counterweight body 100. Of course, the pin 200 can also be located on the side of the counterweight body 100, and the bottom end face of the pin 200 can be soldered to the corresponding pad on the PCB using surface mount technology. Arranging the pin 200 on the side rather than just the top surface reduces the vertical space occupied by the counterweight, making it more suitable for ultra-thin devices with height constraints, such as smart TV boxes and tablets. At the same time, the side pin 200 can extend closer to the PCB plane, shortening the grounding path, further reducing the inductance of the high-frequency shielding circuit, and improving electromagnetic shielding effectiveness. Using SMT soldering means that the counterweight can be automatically mounted and reflow soldered on the same production line as other surface mount components, such as resistors, capacitors, and ICs, without the need for additional manual soldering or mechanical fixing processes, greatly improving production efficiency and consistency. Furthermore, this application does not limit the fixing method of the pin 200 and the counterweight. Preferably, the pin 200 and the counterweight body 100 are integrally formed. Of course, the pin 200 can be fixed to the counterweight body 100 by riveting or snap-fitting. When the mold cost is too high or the material is limited, riveting or snap-fitting can achieve modular design, which is convenient for maintenance and upgrades. The riveting method uses metal pins to press the pin 200 and the counterweight body 100 together, which has the advantages of high connection strength, vibration resistance, and good conductivity, and is suitable for industrial or military products with high reliability requirements. The snap-fit ​​structure uses elastic deformation to achieve rapid assembly without welding or fasteners, which is suitable for consumer electronics products with high production cycle requirements.

[0022] Furthermore, this application does not limit the specific structure of the shielding pin 210 cross-section; the cross-sectional shape of the shielding pin 210 is a polygonal structure. A polygonal cross-section can improve electromagnetic field distribution characteristics by changing the edge curvature and surface area, reducing tip discharge and edge field concentration, thereby improving high-frequency shielding effectiveness. For example, a trapezoidal cross-section can form a gradually transitioning electric field distribution, reducing local electric field strength and improving withstand voltage; a chamfered polygon can reduce eddy current losses and improve the skin effect performance of the shield at high frequencies. In addition, the polygonal structure has better solder paste wetting and bubble removal capabilities during SMT soldering, helping to form full, reliable solder joints and improving connection reliability. Furthermore, this application does not limit the specific shape of the counterweight; preferably, the counterweight body 100 is rectangular, circular, or polygonal. Through various shape options, the counterweight body 100 can flexibly match various PCB layout requirements, increasing the freedom of product design. Furthermore, the number of support pins 220 is two. The two support pins 220 are diagonally or symmetrically distributed to form a stable two-point support structure, which effectively prevents the counterweight from tilting or warping due to uneven weight during the welding process, and ensures that all shielded pins 210 contact the pads at the same time, thus improving welding consistency.

[0023] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0024] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A counterweight with shielding function, characterized in that, include: The counterweight body (100) and pins (200) are provided. The pins (200) are fixed to the upper surface of the counterweight body (100). Each pin (200) includes multiple shielding pins (210) and multiple supporting pins (220). The shielding pins (210) are flat strips with rectangular cross-sections. Each shielding pin (210) includes edge shielding pins (211) and sealing shielding pins (212). The edge shielding pins (211) are distributed along the edges of the first, second, and third sides of the counterweight body (100). Multiple edge shielding pins (211) form a semi-enclosed shielding pin. In the area, the sealing shielding pin (212) is fixed at the opening of the shielding pin area so that the edge shielding pin (211) and the sealing shielding pin (212) form a closed shielding pin area (230). The edge shielding pin (211) is located in the center of the counterweight body (100). The support pin (220) is a cylindrical structure. The support pin (220) has the same height as the shielding pin (210). The support pin (220) is fixed at the opposite corner points of the fourth side of the counterweight body (100). The counterweight body (100) and the pin (200) are integrally formed.

2. The counterweight according to claim 1, characterized in that, The counterweight body (100) is integrally formed from high-density metal material and is used to provide mass counterweight to adjust the center of gravity balance of the electronic device.

3. The counterweight according to claim 1, characterized in that, The distance between the plurality of shielding pins (210) is 1.5mm to 3mm.

4. The counterweight according to claim 1, characterized in that, The width of the shielding pin (210) is 0.3mm to 0.8mm and the length is 5mm to 10mm. There is a gap between two adjacent shielding pins (210) to avoid signal traces from the PCB leading out from the closed shielding pin area (230) and prevent short circuits.

5. The counterweight according to claim 1, characterized in that, The diameter of the support pin (220) is 1.0mm to 2.0mm. The support pin (220) is used to enhance the mechanical strength of the counterweight body (100) and prevent it from loosening or breaking under vibration or impact.

6. The counterweight according to claim 1, characterized in that, The pin (200) can be disposed on the side of the counterweight body (100), and the bottom end face of the pin (200) can be soldered to the corresponding pad on the PCB by surface mount technology.

7. The counterweight according to claim 1, characterized in that, The pin (200) can be fixed to the counterweight body (100) by riveting or snapping.

8. The counterweight according to claim 1, characterized in that, The shielding pin (210) has a polygonal cross-sectional shape.

9. The counterweight according to claim 1, characterized in that, The counterweight body (100) is rectangular, circular, or polygonal in shape.

10. The counterweight according to claim 1, characterized in that, The number of support pins (220) is 2.

Images