Enclosed floatable shielding structure

Abstract

The invention relates to a closed floatable shielding structure, and relates to the technical field of communication, the shielding structure is a thin-wall revolving body structure with two open ends and a totally closed periphery, the shielding structure sequentially comprises a top edge, a connecting surface, an arc surface and a bottom edge from the top end to the bottom end, and the shielding structure has axial elastic deformation, the connecting face comprises a deformation face used for deformation in the pressing process, the connecting position of the connecting face and the arc face is a deformation fulcrum, and the top end and the bottom end of the shielding structure are used for being in contact connection with a butt joint component. The shielding structure has axial elastic deformation so as to meet inter-plate tolerance, the overall structure is small in deformation and not prone to yield, and the influence on radio frequency performance is small; and the part below the horizontal central plane is basically not deformed, the bottom slippage is small, the abrasion is small, and the service life is long.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a closed floating shield structure. BACKGROUND

[0002] In the current communication field, in order to meet the requirements of equipment integration, miniaturization and light weight, the application of inter-board connector is more and more widely. The inter-board RF connector is usually a coaxial structure, including an inner conductor, an insulator and a shielding structure. Since there is a certain tolerance in the board spacing, the inter-board connector is required to realize floating connection, which requires the shielding structure shell to achieve a certain amount of floating. At the same time, with the development of 5G, the use frequency of RF connector is getting higher and higher, so the demand for shielding effect of shielding structure is getting higher and higher.

[0003] There are two common forms of floating shielding structure at present: (1) Slot type metal shell shielding The structure of the slot type metal shielding is shown in Figure 1 This form of shielding needs to open a certain number of split slots on the shell. When the board spacing changes, the split slot part deforms, thereby realizing elastic floating contact between the boards. However, this non-fully-closed structure has poor shielding effect under high-frequency signals, low isolation, and is prone to RF leakage, thereby affecting the overall performance of the product. In the compression process, the split slot structure deforms greatly, which also affects the RF performance of the product; at the same time, in the compression deformation, the bottom will slip greatly, causing wear and affecting the service life of the product.

[0004] (2) Conductive rubber pad Another form of floating shielding structure is to add a conductive rubber pad at the contact end face of the shielding structure shell. The conductive rubber pad has certain conductivity and elasticity, and can realize floating contact. However, this conductive rubber pad has poor recovery to the initial state, low service life, and its compressed shape is difficult to control, affecting the overall RF performance. In addition, the stability of the installation of this conductive rubber pad is poor, and it is prone to failure. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a closed floating shielding structure, which has good shielding performance and restoring force.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is: a closed floating shielding structure, the shielding structure is a rotary body structure with open ends and closed periphery, the shielding structure includes a top edge, a connecting surface, a circular arc surface and a bottom edge from top to bottom, the shielding structure has an axial elastic deformation amount, the connecting surface includes a deformation surface for deformation during pressing, the connecting surface and the circular arc surface are connected at a deformation fulcrum, and the top end and the bottom end of the shielding structure are respectively used for contact connection with the mating components.

[0007] Further, the shielding structure is formed by stamping once.

[0008] Further, the shielding structure has a top opening diameter smaller than a bottom opening diameter.

[0009] Further, the shielding structure has an everted plane at the top edge.

[0010] Further, the shielding structure has a top edge formed by stamping.

[0011] Further, the shielding structure has an everted plane at the bottom edge.

[0012] Further, the shielding structure has a bottom edge formed by stamping.

[0013] Further, the top edge is a horizontal plane, an inclined plane, a curved plane or a vertical plane.

[0014] Further, the bottom edge is a horizontal plane, an inclined plane, a curved plane or a vertical plane.

[0015] Further, the contact connection includes, but is not limited to, surface mount welding, welding-free contact, through-plate welding, threaded connection, screwing, clamping.

[0016] Further, the bottom end of the shielding structure can be in elastic free contact with the mating component.

[0017] The closed floating shielding structure has the following advantages: 1. The closed structure has good high-frequency signal shielding performance while achieving a certain compression amount compared to the traditional slotted shielding, effectively preventing high-frequency signal leakage.

[0018] 2. The overall structure has small deformation and stress, is not easy to yield, has less impact on radio frequency performance, and is stable in performance; compared to conductive adhesive, the compression shape is easy to control, has good resilience, and has high service life.

[0019] 3. Through ingenious structural design, the inclined plane of the connection surface above the horizontal center plane serves as a deformation plane, so that the horizontal center plane below basically does not deform, the overall structure is stable, the bottom does not have large slip, has small wear, and has high service life.

[0020] 4. The overall structure is integrally stamped, simple in structure, easy to install, and low in cost.

[0021] 5. The structures of the top edge and the bottom edge can be reasonably selected and connected according to the structure of the connection part of the mating component. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The prior art is a slotted metal shell shield; Figure 2 Fig. 1 is a perspective view of the shield structure of the present application; Figure 3 Fig. 2 is a sectional view of the first structure of the shield structure of the present application; Figure 4 Fig. 3 is a sectional view of the second structure of the shield structure of the present application; Figure 5 Fig. 4 is a sectional view of the third structure of the shield structure of the present application; Figure 6 Fig. 5 is a sectional view of the fourth structure of the shield structure of the present application; Figure 7 Fig. 6 is a schematic view of the deformation process of the shield structure of the present application; Figure 8 Fig. 7 is a schematic view of the application of the shield structure of the present application in a radio frequency connector between boards; Figure 9 Fig. 8 is a schematic view of the through-plate welding of the shield structure of the present application.

[0023] Reference signs: 1, shield structure, 11, top edge, 12, connecting surface, 121, deformation surface, 122, vertical surface, 13, circular arc surface, 14, bottom edge, 15, deformation fulcrum, 16, horizontal center surface; 2, inner conductor, 3, insulator; 41, PCB board one / housing body one, 42, PCB board two / housing body three, 43, housing body two, 44, groove, 5, through-plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0025] It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in shape, number and proportion, and the layout pattern of the components may also be more complex.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes shall still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and objectives that can be achieved by the present invention.

[0027] In the present invention, terms such as upper, lower, horizontal, vertical, top, bottom, etc. are all relative to the positional relationships shown in the drawings and are not intended to be absolute limitations on the present invention.

[0028] like Figures 2-7 As shown, this embodiment provides a closed, floating shielding structure primarily used as an external shield for inter-board RF connectors. The shielding structure 1 is a thin-walled, revolved structure with open ends and a closed perimeter. The top and bottom ends form a continuous, closed surface. From top to bottom, the shielding structure comprises, in order, a top edge 11, a connecting surface 12, an arcuate surface 13, and a bottom edge 14. The connecting surface 12 is an integrally formed surface and includes a deformation surface 121 for deformation during the downward pressure process. The deformation surface 121 is a surface that is non-parallel to the horizontal plane, but does not include a vertical surface. For example, the connecting surface 12 can be a single inclined surface, a single arcuate surface, or a multi-segmented surface formed by combining inclined / arcd surfaces. The arcuate surface 13 connects to the connecting surface 12 on one side and to the bottom edge 14 on the other. The shielding structure 1 exhibits axial elastic deformation. The junction of the connecting surface 12 and the arcuate surface 13 serves as a deformation fulcrum 15, with final deformation primarily concentrated at the deformation surface 121. The top and bottom ends of the shielding structure 1 are each configured to contact and connect with a mating component. The docking component is usually a housing or a PCB board.

[0029] Further, if Figure 3 As shown, the shielding structure 1 is formed from metal in a single step through stamping. The diameter of the top opening is smaller than that of the bottom opening. If the connecting surface 12 adopts a sloped surface with a vertical surface, the shielding structure 1 resembles an inverted bowl (with an open bottom). Due to the requirements of the stamping process, the connection between the connecting surface 12, the top edge 11, and the sloped surface is smoothly rounded using arcs. All multi-segment surfaces within the connecting surface 12 also smoothly transition through arcs.

[0030] Furthermore, the shielding structure 1 is turned outward at the top edge 11 to form an outward-turned plane, which can be as follows: Figure 3 The horizontal plane shown or Figure 4 The bevel shown, or by stamping to form the top as shown Figure 6The shielding structure 1 has a curved edge as shown. When the top edge 11 and bottom edge 14 of the shielding structure 1 are not turned outward, a vertical surface is formed against the mating component, and a surface mount welding connection or a solderless contact connection is adopted. The shielding structure 1 is turned outward at the bottom edge 14 to form an outward flat surface, which can be a horizontal surface or an inclined surface. The shielding structure 1 has a bottom curved edge formed by stamping at the bottom edge 14, which can be an arc surface. If the top edge 11 and bottom edge 14 of the shielding structure 1 are not turned outward or stamped and curled, a vertical surface is directly formed, which can also be used for through-board welding.

[0031] Furthermore, the shielding structure 1 has an axial elastic deformation. Figure 7 As shown, the shielding structure 1 is connected between the top and the bottom by a connecting surface 12, and the plane where the connecting surface 12 and the arc surface 13 are connected is defined as the horizontal center plane 16. The arc surface 13 below the horizontal center plane 16 is downwardly curved and has a small radius, and the angle with the horizontal plane is large (referring to the obtuse angle between the arc tangent at the connection between the arc surface 13 and the connecting surface 12 and the horizontal plane), so the torque received during the downward pressure process is small; while the connecting surface 12 above the horizontal center plane 16 (taking the inclined surface as an example) has a longer inclined surface and a smaller angle with the horizontal plane (an acute angle), so the torque received during the downward pressure process is large, and the two points form a deformation fulcrum 15, and the final deformation basically only exists at the inclined surface connecting surface 12; during compression and rebound deformation, the deformed inclined surface connecting surface 12 floats around the deformation fulcrum 15 on the upper and lower sides of the horizontal center plane 16, realizing elastic deformation along the axial direction, and the overall structural deformation is small. When used in the inter-board RF connector, the impact on the RF performance is small and the performance is stable.

[0032] When the connecting surface 12 is composed of an inclined surface and a vertical surface 122, the junction of the inclined surface and the arc surface 13 serves as a deformation fulcrum 15. During deformation and rebound, since the overall change of the shield structure 1 is relatively small, the vertical surface 12 above the inclined surface remains perpendicular to the horizontal plane, and the rebound force F1 is always in the vertical direction. The top edge 11 does not move laterally to damage the top of the shield structure 1 and the structure where it fits with the printed circuit board or the outer shell (such as welding). The shield structure 1 below the horizontal center plane 16 is essentially unchanged. Therefore, compared with slotted shielding, the bottom of the shield structure of the present invention does not experience significant slippage, has less wear, and has a longer lifespan. Compared with conductive adhesives, the compressed shape is easier to control, the rebound is better, and the service life is longer. The bottom edge 14 can be stamped into a curled structure to further reduce wear and improve contact reliability.

[0033] The application of the above shielding structure in the inter-board RF connector is as follows: Figure 8As shown in the drawings, the inter-board radio frequency connector is arranged between two PCBs, and the inter-board radio frequency connector comprises a coaxial inner conductor 2, an insulator 3 and a shielding structure 1, the inner conductor 2 can float in the axial direction, the outer part of the inner conductor 2 is provided with the insulator 3, the shielding structure 1 is arranged around the inner conductor 2, the top end of the shielding structure 1 is connected to the PBC board 1 41 (or the outer shell 1) by means of surface soldering, the bottom end of the shielding structure 1 is in elastic free contact with the outer shell 2 43, the outer shell 2 43 is arranged outside the insulator 3, or the inter-board radio frequency connector can also not contain the outer shell 2 43, and the bottom end of the shielding structure 1 is directly in elastic free contact with the PCB 2 42 (or the outer shell 3).

[0034] Further, the printed board or the outer shell in contact with the bottom end of the shielding structure 1 is provided with an annular groove 44 for generally positioning the shielding structure 1, and the bottom end of the shielding structure 1 is arranged in the groove 44 and in elastic free contact with the outer shell or the printed board.

[0035] Further, the connection between the top end of the shielding structure 1 and the PCB is not limited to surface soldering, but can also be free of welding, and the contact-free welding mode or the through-plate welding mode can be adopted, as shown in the drawings. Figure 9 As shown in the drawings, when the through-plate welding is adopted, the through-plate 5 needs to be arranged at the opening of the top end of the shielding structure. Meanwhile, the threaded connection, screwing, clamping and other contact connection forms can also be adopted, without affecting the deformation of the shielding structure 1.

[0036] The shielding structure of the present application adopts a closed structure, and therefore has better shielding performance for high-frequency signals; the overall deformation of the shielding structure is small, and the stable radio frequency performance can be ensured, the ingenious structure design ensures that the top end of the shielding structure does not move horizontally, the bottom end has small sliding and small wear, the reliable contact is ensured while the rebound force is small, the integrated installation between the boards is met, the one-piece stamping structure is adopted, the structure is simple, the installation is convenient, and the cost is low.

[0037] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, although the present application has been disclosed as above, however, it is not intended to limit the present application, any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution range of the present application, and equivalent embodiments with equivalent changes are made, but as long as the technical solution content of the present application is not departed from, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A closed floating shielding structure, characterized in that: The shielding structure (1) is a rotating body structure with two ends open and four sides closed. The shielding structure (1) includes a top edge (11), a connecting surface (12), an arc surface (13) and a bottom edge (14) in sequence from the top to the bottom. The shielding structure (1) has an axial elastic deformation amount. The connecting surface (12) includes a deformation surface (121) for deformation during the pressing process. The connection point between the connecting surface (1) and the arc surface (13) is a deformation fulcrum (15). The top and bottom ends of the shielding structure (1) are respectively used for contact connection with the docking component.

2. A closed floating shielding structure according to claim 1, characterized in that: The shielding structure (1) is formed from metal in one step by stamping.

3. The closed floating shielding structure according to claim 1, characterized in that: The top opening diameter of the shielding structure (1) is smaller than the bottom opening diameter.

4. The closed floating shielding structure according to claim 1, characterized in that: The shielding structure (1) is turned outward at the top edge (11) to form an outward-turned plane.

5. The closed floating shielding structure according to claim 1, characterized in that: The shielding structure (1) is formed with a top curling edge at the top edge (11) by stamping.

6. The closed floating shielding structure according to claim 1, characterized in that: The shielding structure (1) is turned outward at the bottom edge (14) to form an outward-turned plane.

7. The closed floating shielding structure according to claim 1, characterized in that: The shielding structure (1) is formed with a bottom curling edge at the bottom edge (14) by stamping.

8. The closed floating shielding structure according to claim 1, wherein: The top edge (11) is a horizontal surface, an inclined surface, a curved surface or a vertical surface.

9. The closed floating shielding structure according to claim 1, wherein: The bottom edge (14) is a horizontal surface, an inclined surface, an arc surface or a vertical surface.

10. The closed floating shielding structure according to claim 1, characterized in that: The contact connection includes but is not limited to surface mount welding, solderless contact, through-board welding, threaded connection, screw connection, and clamping connection.

11. The closed floating shielding structure according to claim 1, characterized in that: The bottom end of the shielding structure (1) can be in elastic and free contact with the docking component.

Images