Anti-interference communication cavity castings

Abstract

The utility model provides a kind of anti-interference communication cavity casting, it is related to communication cavity technical field, including main cavity casting and inner partition, the inside of main cavity casting is provided with inner partition, the array of main cavity casting inside is provided with vertical slot, the bottom of main cavity casting inside is provided with inner grid slot, the bottom outside of main cavity casting is provided with outer grid convex strip protruding, the first end both sides of inner partition are provided with side boss protruding, the vertical slot of main cavity casting inside is slidably connected with stud partition, U-shaped partition and T-shaped partition. Main cavity casting is slidably combined by vertical slot and inner partition, stud partition, U-shaped partition and T-shaped partition, meets the setting requirement of main cavity casting internal passage, reduces the casting difficulty of main cavity casting, solves the problem that complex inner cavity structure requires high mould core-pulling mechanism, is prone to core-pulling jamming, insufficient cavity filling and the like.

Description

Technical Field

[0001] This utility model relates to the field of communication cavity technology, and in particular to an anti-interference communication cavity casting. Background Technology

[0002] The communication cavity is a sealed / semi-sealed metal shell in communication equipment used to house core electronic components (such as chips, circuit boards, and connectors). Its core functions are to physically protect the internal components (from impact, dust, and water) and provide electromagnetic shielding (blocking external electromagnetic interference from entering and preventing internal electromagnetic signals from leaking out). It is an important component to ensure the stable operation of communication equipment in complex electromagnetic environments.

[0003] The existing communication cavity is manufactured by one-piece casting. The complex partitions and channels inside the communication cavity need to be formed by core pulling through precision molds, which has obvious process limitations. The complex internal cavity structure places extremely high demands on the mold core pulling mechanism, which is prone to problems such as core pulling jamming and insufficient cavity filling. The complex internal cavity structure is also prone to casting defects such as shrinkage cavities, cracks, and sand holes during the one-piece molding process. Utility Model Content

[0004] This utility model provides an anti-interference communication cavity casting. The main cavity casting meets the requirements for setting up internal channels by sliding combination of vertical slots and internal partitions, stud partitions, U-shaped partitions and T-shaped partitions, reducing the casting difficulty of the main cavity casting, avoiding the problem of core pulling in molds with complex internal cavities, and achieving significant optimization of the casting process. The incidence of casting defects such as shrinkage cavities and cracks is reduced from 15% to less than 3%.

[0005] This utility model provides an anti-interference communication cavity casting, specifically including a main cavity casting and an inner partition. The main cavity casting has an inner partition inside. The main cavity casting is an integrated die-cast aluminum alloy structure, made of 6061-T6 material with a conductivity ≥30MS / m and a wall thickness of 5-8mm to ensure basic electromagnetic shielding performance. The interior of the main cavity casting is divided into independent sub-shielding spaces by the inner partition to achieve electromagnetic isolation between modules. Vertical slots are arranged in an array on the inner side of the main cavity casting. An inner mesh groove is provided on the bottom inner side, and an outer mesh ridge protrudes from the outer bottom of the main cavity casting. The outer mesh ridge is used to enhance the rigidity of the cavity and assist in heat dissipation to avoid high temperature. The side wall of the main cavity casting is reserved with interface mounting holes. A stepped shoulder is provided on the inner side of the interface mounting hole for installing a shielded RF connector such as an SMA shielded connector. The connector shell is tightly fitted with the shoulder and screwed in place. The shell is electrically connected to the main cavity to form electromagnetic shielding at the interface. Electromagnetic sealant is filled to further block electromagnetic leakage from the interface gap.

[0006] Furthermore, the vertical slots are formed on the inner vertical surface of the main cavity casting, and vertical slots are arranged in an array at intervals on the inner vertical surface of the main cavity casting. The vertical slots, inner grid grooves and inner partitions, U-shaped partitions and T-shaped partitions are slidably combined.

[0007] Furthermore, the inner mesh groove and the vertical slot are aligned, the inner mesh groove increases the thickness of the vertical slot, and improves the structural strength of the vertical slot. The lower part of the vertical slot is connected to the inner mesh groove, and gaskets are embedded inside both the vertical slot and the inner mesh groove to improve sealing and shielding performance.

[0008] Furthermore, the outer mesh protrusions on the outside of the main cavity casting and the inner mesh grooves on the inside of the main cavity casting are aligned, so the main cavity casting only needs to form standardized vertical slots and inner mesh grooves, avoiding the problem of mold core pulling for complex internal cavities.

[0009] Furthermore, the inner partition has side protrusions on both sides of its first end, and the vertical slots inside the main cavity casting are slidably connected to stud partitions, U-shaped partitions and T-shaped partitions. The stud partitions are plate-shaped structures with mounting studs, which serve as both partition shielding and circuit board fixing functions.

[0010] Furthermore, the stud partition, the U-shaped partition, and the T-shaped partition all have side protrusions on both sides of their front ends, and the side protrusions are slidably connected to the vertical slots.

[0011] Furthermore, the U-shaped partition is a U-shaped structure with a concave center. The first end of the U-shaped partition is fixed to the cover plate with screws without obstructing the connection between the two sides. The T-shaped partition is a plate structure with a T-shaped bend. The T-shaped partition is used to achieve L-shaped area partitioning and shielding, adapting to the needs of complex module layout. The lower ends of the inner partition, stud partition, U-shaped partition and T-shaped partition are all slidably inserted into the inner grid groove to form a dual positioning structure of vertical surface + bottom surface.

[0012] This utility model provides an anti-interference communication cavity casting, which has the following beneficial effects: The main cavity casting meets the requirements for setting up internal channels by sliding combination of vertical slots and internal partitions, stud partitions, U-shaped partitions, and T-shaped partitions, reducing the casting difficulty of the main cavity casting, avoiding the problem of mold core pulling in complex internal cavities, and achieving significant optimization of the casting process.

[0013] With the help of the array layout of the grid slots in the vertical slot, the installation position and combination of various types of internal partitions, such as internal partitions, U-shaped partitions, and T-shaped partitions, can be flexibly adjusted to meet the setting requirements of the internal channels of different models of main cavity castings. There is no need to modify or redevelop the main cavity casting mold for different models of communication equipment, which improves the mold reuse rate and further reduces manufacturing costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0016] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 A schematic diagram of the outer mesh protrusion structure of this application is shown; Figure 3 A schematic diagram of the main cavity casting structure of this application is shown; Figure 4 A schematic diagram of the internal partition structure of this application is shown; Figure 5 A structural schematic diagram of the U-shaped partition of this application is shown; Figure 6 This paper shows a structural schematic diagram of the main cavity casting of this application in its separated state, including the internal partition, side protrusion, stud partition, U-shaped partition, and T-shaped partition. Figure label: 1. Main cavity casting; 101. Vertical slot; 102. Inner mesh groove; 103. Outer mesh protrusion; 2. Internal partition; 201. Side protrusion; 202. Stud partition; 203. U-shaped partition; 204. T-shaped partition. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] Example 1: Please refer to Figures 1 to 6 : This utility model proposes an anti-interference communication cavity casting, including a main cavity casting 1 and an inner partition 2. The main cavity casting 1 is an integrated die-cast aluminum alloy structure, made of 6061-T6 material with a conductivity ≥30MS / m and a wall thickness of 5-8mm to ensure basic electromagnetic shielding performance. The interior of the main cavity casting 1 is divided into independent sub-shielding spaces by the inner partition 2 to achieve electromagnetic isolation between modules. The inner side of the main cavity casting 1 is provided with an array of vertical slots 101, and the bottom of the inner side of the main cavity casting 1 has an inner partition 2. The main cavity casting 1 has a mesh groove 102 and an outer mesh protrusion 103 protruding from the bottom outer side. The outer mesh protrusion 103 is used to enhance the rigidity of the cavity and assist in heat dissipation to avoid high temperature. The side wall of the main cavity casting 1 has a reserved interface mounting hole. A stepped shoulder is provided on the inner side of the interface mounting hole for installing a shielded RF connector such as an SMA shielded connector. The connector shell is tightly fitted to the shoulder and screwed in place. The shell is electrically connected to the main cavity to form electromagnetic shielding at the interface. Electromagnetic sealant is filled to further block electromagnetic interference from entering through the interface seam. To prevent leakage, vertical slots 101 are formed on the inner vertical surface of the main cavity casting 1. Vertical slots 101 are arranged in a spaced array on the inner vertical surface of the main cavity casting 1. Through a sliding combination scheme of vertical slots 101, inner mesh grooves 102, inner partitions 2, U-shaped partitions 203, and T-shaped partitions 204, the casting process is significantly optimized. The inner mesh grooves 102 and vertical slots 101 are aligned. The inner mesh grooves 102 increase the thickness of the vertical slots 101, improving the structural strength of the vertical slots 101. The lower part is connected to the inner mesh groove 102. Both the vertical slot 101 and the inner mesh groove 102 are embedded with gaskets to improve sealing and shielding performance. The main cavity casting 1 is provided with an inner partition 2. The inner partition 2 has side protrusions 201 on both sides of its head end. The vertical slot 101 on the inner side of the main cavity casting 1 is slidably connected with stud partition 202, U-shaped partition 203 and T-shaped partition 204. The stud partition 202 is a plate structure with mounting studs, which has the functions of partition shielding and circuit board fixing.

[0019] In this embodiment, the outer mesh protrusion 103 on the outer side of the main cavity casting 1 and the inner mesh groove 102 on the inner side of the main cavity casting 1 are aligned. The main cavity casting 1 only needs to form standardized vertical slots 101 and inner mesh grooves 102, thus avoiding the problem of mold core pulling for complex internal cavities.

[0020] In this embodiment, the first ends of the stud partition 202, the U-shaped partition 203 and the T-shaped partition 204 are all provided with side protrusions 201. The side protrusions 201 and the vertical slot 101 are slidably connected to each other, which meets the setting requirements of the internal channels of the main cavity casting 1 of different models, and there is no need to modify or redevelop the main cavity casting mold for different models of communication equipment.

[0021] In this embodiment, the U-shaped partition 203 is a U-shaped structure with a concave center. The first end of the U-shaped partition 203 is fixedly connected to the cover plate with screws without obstructing the communication between the two sides. The T-shaped partition 204 is a T-shaped plate structure. The T-shaped partition 204 is used to achieve L-shaped area partition shielding to adapt to complex module layout requirements. The lower ends of the inner partition 2, stud partition 202, U-shaped partition 203 and T-shaped partition 204 are all slidably inserted into the inner grid groove 102 to form a dual positioning structure of vertical surface + bottom surface, ensuring the reliability of the connection. The same main cavity casting 1 can meet the partition shielding requirements of the radio frequency module and the digital module respectively by adjusting the position of the U-shaped partition 203, without replacing the basic mold, thus improving the mold reuse rate.

[0022] In this second embodiment, based on the first embodiment, a grounding assembly consisting of three copper grounding posts is provided on one side of the bottom of the main cavity casting 1. The grounding resistance of the three copper grounding posts is ≤0.1Ω. The grounding terminals of the internal components are uniformly connected to the grounding posts through grounding wires, and then connected to the main grounding system of the equipment to avoid forming a grounding loop.

[0023] The working principle of this embodiment: Addressing the pain points of high casting difficulty and long mold development cycles caused by the complex structure of traditional integrated communication cavities, such as multiple partitions and wiring channels, this design achieves significant optimization of the casting process through a sliding combination scheme of vertical slots 101, inner mesh grooves 102, inner partitions 2, U-shaped partitions 203, and T-shaped partitions 204. The internal partition structure of traditional integrated casting is split into a main cavity basic frame + detachable partitions. The main cavity casting 1 only needs to form standardized vertical slots 101 and inner mesh... The groove 102 avoids the problem of core pulling in molds with complex internal cavities. Actual tests show that the yield of the main cavity casting 1 has increased from the traditional 70% to over 92%, and the incidence of casting defects such as shrinkage cavities and cracks has decreased from 15% to below 3%. The development cycle of the standardized main cavity mold has been shortened from 30 days to 15 days, the number of mold debugging times has been further reduced, and the cost of a single mold debugging has been reduced by 60%. At the same time, the inner partition 2, U-shaped partition 203, and T-shaped partition 204 are mass-produced through dedicated molds, which shortens the CNC precision repair time and improves processing efficiency. With the help of the array layout of the grid slots 102 inside the vertical slot 101, the installation positions and combinations of various types of partitions, such as the inner partition 2, U-shaped partition 203, and T-shaped partition 204, can be flexibly adjusted. This allows one main cavity mold to adapt to 8-12 different specifications of communication modules, improving the compatibility range compared to traditional fixed structures. The same main cavity casting 1 can meet the partition shielding requirements of the RF module and digital module by adjusting the position of the U-shaped partition 203, without replacing the basic mold. Furthermore, there is no need to modify or redevelop the main cavity casting mold for different communication equipment models, increasing the mold reuse rate from the traditional 10% to 90%. With an annual production capacity of over 0%, producing 10 different models of cavities, the traditional approach requires an investment of 500,000 yuan in mold costs. This design only requires an investment of 80,000 yuan in mold costs for the main cavity and partition components, reducing annual mold costs by 84%. At the same time, it reduces production line debugging time caused by mold switching, further increasing production line capacity. The sliding fit between the inner partition component 2 and the inner mesh groove 102 can simultaneously construct a flexible internal wiring channel, avoiding electromagnetic interference caused by cable crossings. It also facilitates later equipment maintenance and cable upgrades, avoiding the need to disassemble the cavity to adjust wiring and the time-consuming maintenance required by traditional fixed partitions, thus balancing structural stability and ease of operation and maintenance.

[0024] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments disclosed herein; other structures may refer to general designs.

[0025] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0026] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A casting for an anti-interference communication cavity, comprising: The main cavity casting (1) and the inner partition (2) are characterized in that the inner cavity casting (1) is provided with an inner partition (2), the inner side of the main cavity casting (1) is provided with an array of vertical slots (101), the bottom of the inner side of the main cavity casting (1) is provided with an inner grid groove (102), and the outer side of the bottom of the main cavity casting (1) is provided with an outer grid protrusion (103).

2. The anti-interference communication cavity casting according to claim 1, characterized in that, The vertical slots (101) are opened on the inner vertical surface of the main cavity casting (1), and the vertical slots (101) are arranged in an array at intervals on the inner vertical surface of the main cavity casting (1).

3. The anti-interference communication cavity casting according to claim 1, characterized in that, The inner mesh groove (102) and the vertical slot (101) are aligned, and the lower part of the vertical slot (101) is connected to the inner mesh groove (102).

4. The anti-interference communication cavity casting according to claim 1, characterized in that, The outer grid protrusion (103) on the outer side of the main cavity casting (1) and the inner grid groove (102) on the inner side of the main cavity casting (1) are aligned.

5. The anti-interference communication cavity casting according to claim 1, characterized in that, The inner partition (2) has side protrusions (201) on both sides of its head end. The vertical slot (101) inside the main cavity casting (1) is slidably connected to the stud partition (202), U-shaped partition (203) and T-shaped partition (204).

6. The anti-interference communication cavity casting according to claim 5, characterized in that, The stud partition (202), U-shaped partition (203) and T-shaped partition (204) are provided with side protrusions (201) on both sides of their heads, and the side protrusions (201) and vertical slots (101) are slidably connected.

7. The anti-interference communication cavity casting according to claim 6, characterized in that, The U-shaped partition (203) is a U-shaped structure with a concave center, and the T-shaped partition (204) is a plate structure with a T-shaped bend. The lower ends of the inner partition (2), stud partition (202), U-shaped partition (203) and T-shaped partition (204) are all slidably inserted into the inner grid groove (102).

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