CN219876736U

CN219876736U - Shielding structure, communication module and communication device

Info

Publication number: CN219876736U
Application number: CN202223595327.7U
Authority: CN
Inventors: 王洁; 杨涛
Original assignee: Shanghai Simcom Wireless Solutions Co Ltd
Current assignee: Shanghai Simcom Wireless Solutions Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-10-20
Anticipated expiration: 2032-12-30

Abstract

The embodiment of the utility model relates to the field of communication and discloses a shielding structure, which comprises the following components: the shielding frame is used for welding the circuit board and encircling the wireless module; the shielding cover is arranged on the shielding frame and encloses a shielding cavity for covering the wireless module together with the shielding frame, and the thermal expansion coefficient of the shielding cover is different from that of the shielding frame; the shielding cover comprises a main body part used for covering the top of the shielding frame, a matching part which is bent from the edge of the main body part, extends and is matched with the shielding frame, the matching part comprises a matching arm and a clamping lug which are respectively connected with the main body part and are mutually separated and independent, the matching arm is in clearance fit with the shielding frame, and the clamping lug is in interference fit with the shielding frame. The embodiment of the utility model also provides a communication module and a communication device. The shielding frame, the communication module and the communication device provided by the embodiment of the utility model can solve the problem of cold joint and cold joint when the shielding frame passes through a furnace.

Description

Shielding structure, communication module and communication device

Technical Field

The embodiment of the utility model relates to the field of communication, in particular to a shielding structure, a communication module and a communication device.

Background

With the rapid development of 5G technology, the variety of various communication devices is increasing. The wireless module upper cover in the communication equipment is provided with the shielding cover, the shielding cover can prevent the wireless module from generating interference and radiation to the outside, and can shield external interference sources such as an electric field, a magnetic field and the like in the working environment of the wireless module so as to ensure the normal work of the wireless module. In the actual manufacturing process, the shielding cover is fixed through the shielding frame welded on the circuit board, and the shielding cover made of metal materials is fixed on the shielding frame to enclose a shielding cavity for sealing the wireless module.

However, the shielding cover and the shielding frame are made of different materials, when the shielding cover and the shielding frame pass through the furnace after being assembled, different deformation amounts can be generated due to different thermal expansion coefficients, the shielding cover and the shielding frame are buckled tightly originally, larger acting force can be generated between the shielding cover and the shielding frame, and the problem of cold joint and cold joint release caused by excessive pulling of the shielding frame under larger stress condition is caused.

Disclosure of Invention

The utility model aims to provide a shielding structure, a communication module and a communication device, which can solve the problems of cold joint and off-joint caused by excessive pulling of a shielding frame due to larger stress when the shielding frame passes through a furnace.

In order to solve the above technical problems, an embodiment of the present utility model provides a shielding structure, including: the shielding frame is used for being welded on the circuit board and encircling the wireless module on the circuit board; the shielding cover is arranged on the shielding frame and encloses a shielding cavity for covering the wireless module together with the shielding frame, and the thermal expansion coefficient of the shielding cover is different from that of the shielding frame; the shielding cover comprises a main body part used for covering the top of the shielding frame, a matching part which is bent from the edge of the main body part, extends and is matched with the shielding frame, the matching part comprises a matching arm and a clamping lug which are respectively connected with the main body part and are mutually separated and independent, the matching arm is in clearance fit with the shielding frame, and the clamping lug is in interference fit with the shielding frame.

The embodiment of the utility model also provides a communication module, which comprises a circuit board provided with a wireless module and the shielding structure, wherein the shielding frame is arranged on the circuit board and surrounds the wireless module, and the wireless module is accommodated in a shielding cavity formed by the shielding cover and the shielding frame.

The embodiment of the utility model also provides a communication device which comprises a shell and the communication module which is arranged in the shell and is described above.

Compared with the prior art, the embodiment of the utility model is characterized in that the attaching arm and the clamping lug which are used for being matched with the shielding frame are mutually separated, the attaching arm is attached with the shielding frame to enclose a shielding cavity, the clamping lug is in interference fit with the shielding frame to realize position fixing, and when different deformation amounts are generated by the shielding frame and the shielding cover due to different thermal expansion coefficients in the furnace returning process, only the clamping lug which is originally tightly matched with the shielding frame can apply stress to the shielding frame, so that the problems of insufficient welding and desoldering caused by excessive pulling of the shielding frame under the condition of larger stress due to larger stress applied by the whole matching part are avoided.

In addition, the cooperation portion is the board-like hem that extends from the edge bending of main part, be provided with the breach on the hem, the breach will the hem is cut apart into laminating arm and card ear. The shielding cover with the attaching arms and the clamping lugs can be manufactured by punching the plate and then cutting, and the whole plate is manufactured simply and conveniently, so that the production efficiency is improved, and the cost is reduced.

In addition, the notch extends from the edge of the matching part to the joint of the matching part and the main body part; or, the notch extends from the edge of the mating portion to the junction of the mating portion and the main body portion and extends into the main body portion. The notch does not end at the junction of the matching part and the main body part, but continues to extend towards the inside of the main body part, so that when the clamping lug applies force to the shielding frame, the part on the main body part, which is connected with the clamping lug, can also deform to a certain extent due to the interaction force, thereby sharing part of stress, enabling the stress of the shielding frame to be smaller, and further reducing the risk of the shielding frame that the cold joint and the off-joint occur.

In addition, the number of the notches is two, and the two notches divide the folded edge into two attaching arms which are oppositely arranged along the length direction of the edge of the main body part and one clamping lug which is positioned at the center of the two attaching arms. The clamping lugs are positioned at the centers of the two attaching arms, so that the clamping lugs apply force to the shielding frame from the center of the shielding cover main body part, and the warping of the shielding cover possibly caused by the force applied from the edge of the shielding cover main body part is avoided.

In addition, a convex hull is arranged on one of the attaching arm and the shielding frame, a through hole corresponding to the convex hull is arranged on the other of the attaching arm and the shielding frame, and the convex hull is at least partially accommodated in the through hole and is in clearance fit with the through hole. The convex hull and the through hole are formed in the attaching arm and the shielding frame, the convex hull and the through hole can be buckled when at least part of the convex hull is accommodated in the through hole, the clearance fit between the convex hull and the through hole can prevent the attaching arm and the shielding frame from being too tightly attached, and the attaching arm is placed to apply force to the shielding frame when different deformation amounts are generated due to different thermal expansion coefficients, so that the problem that the shielding frame is not excessively pulled to cause cold welding and off welding under the condition of larger stress is solved.

In addition, a convex hull is arranged on one of the clamping lugs and the shielding frame, a pit corresponding to the convex hull is arranged on the other of the clamping lugs and the shielding frame, and the convex hull is at least partially accommodated in the pit and is in interference fit with the pit. The convex hull and the pit are matched, so that the convex hull can smoothly slide into and out of the pit when the clamping lugs and the shielding frame are combined and disassembled, and the problem that the convex hull is difficult to disassemble and assemble due to interference fit is solved.

In addition, the dimension of the attaching arm is larger than the dimension of the clamping ear along the length direction of the edge of the main body part. The size design can utilize the relatively smaller card ear of size to realize the relative fixation of card ear and shielding frame, when returning to the furnace in-process because of thermal expansion coefficient is different and exert force to the shielding frame, the relatively smaller card ear of size produces the power littleer, shielding frame rosin joint, the feasible littleer of desoldering.

In addition, two opposite edges of the main body part are respectively provided with one matching part. The cooperation portion sets up at the relative two edges of main part for whole shield cover is from symmetrical position and shielding frame interference fit, guarantees the symmetric distribution of joining in marriage the power, can reach better fixed effect between shield cover and the shielding frame, avoids joining in marriage the uneven warpage and the skew that leads to of power distribution.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic diagram of an explosion structure of a circuit board provided with a shielding structure and a wireless module according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a circuit board assembly structure provided with a shielding structure and a wireless module according to an embodiment of the present utility model;

fig. 3 is a schematic cross-sectional view of the shielding structure along AA shown in fig. 2.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present utility model. However, the claimed utility model may be practiced without these specific details and with various changes and modifications based on the following embodiments.

The embodiment of the present utility model relates to a shielding structure 10, as shown in fig. 1, 2 and 3, the shielding structure 10 includes: a shielding frame 11 for being soldered to the circuit board 20 and surrounding the wireless module 30 on the circuit board 20; a shielding cover 12 disposed on the shielding frame 11 and enclosing a shielding cavity 120 with the shielding frame 11 for covering the wireless module 30, wherein a thermal expansion coefficient of the shielding cover 12 is different from that of the shielding frame 11; the shielding cover 12 comprises a main body 121 for covering the top of the shielding frame 11, and a fitting portion 122 bent from the edge of the main body 121 and fitted to the shielding frame 11, the fitting portion 122 comprises fitting arms 1221 and clamping lugs 1222 which are respectively connected with the main body 121 and are mutually separated from each other, the fitting arms 1221 are in clearance fit with the shielding frame 11, and the clamping lugs 1222 are in interference fit with the shielding frame 11.

Compared with the prior art, in the embodiment of the utility model, the attaching arm 1221 and the clamping lug 1222 which are used for being matched with the shielding frame 11 are mutually separated, the attaching arm 1221 is attached with the shielding frame 11 to enclose the shielding cavity 120, the clamping lug 1222 is in interference fit with the shielding frame 11 to realize position fixing, and when different deformation amounts are generated by the shielding frame 11 and the shielding cover 12 due to different thermal expansion coefficients in the furnace returning process, only the clamping lug 1222 which is originally tightly matched with the shielding frame 11 can apply stress to the shielding frame 11, so that the problems of insufficient welding and desoldering caused by excessive pulling of the shielding frame 11 under the condition of large stress due to larger stress applied by the whole matching part 122 are avoided.

The details of implementation of the shielding structure 10 of the intravascular ultrasound catheter according to the present embodiment are specifically described below, and the following description is provided only for ease of understanding and is not a necessity for implementing the present embodiment.

The shielding cage 11 is disposed on the circuit board 20 for providing support for the shielding cage 12. Specifically, the shielding frame 11 is soldered to the circuit board 20 and surrounds the wireless module 30 on the circuit board 20. In order to achieve the shielding effect around the wireless module 30, the shielding frame 11 is made of a metal material, specifically, in one possible embodiment, the shielding frame 11 may be made of copper-based alloy with nickel as a main additive element, which is easy to solder and convenient to realize welding with the circuit board 20, has good heat dissipation and shielding effect, and can achieve the ideal shielding effect while ensuring efficient heat dissipation.

The shielding cover 12 is disposed on the shielding frame 11, so that the shielding cover 12 above the wireless module 30 and the shielding frame 11 around the wireless module 30 enclose a shielding cavity 120 with an opening facing the circuit board 20 above and around the wireless module 30, so that the wireless module 30 on the circuit board 20 is covered in the shielding cavity 120, which can prevent the wireless module 30 from interfering and radiating with the outside, and can shield the external interference sources such as electric field and magnetic field in the working environment of the wireless module 30, so as to ensure the normal operation of the wireless module 30. It will be appreciated that the shield 12 is also formed of a metallic material, and in particular, in one possible embodiment, the shield 12 may be formed of a stainless steel material that is readily stamped and bent to facilitate manufacturing.

Specifically, in one possible embodiment, the shield 12 includes two portions, a body portion 121 and a mating portion 122. The main body 121 is used to cover the top of the shielding frame 11, and may have a flat plate shape, so as to occupy a limited space in the thickness direction of the main body, thereby avoiding the difficulty of miniaturizing the entire wireless communication device. It will be understood, of course, that the body portion 121 is not limited to a plate shape under some special design requirements. The engaging portion 122 is bent and extended from the edge of the main body 121 and is used for attaching to the shielding frame 11. Because the thermal expansion coefficients of the shielding frame 11 and the shielding cover 12 are different, different deformation amounts can be generated when the shielding cover 12 and the shielding cover 12 pass through the furnace after the assembly is completed, so that larger acting force can be generated between the shielding cover 12 and the shielding frame 11, and the shielding frame 11 is excessively pulled under larger stress, so that the problems of cold joint and cold joint removal are caused.

Therefore, the engaging portion 122 according to the embodiment of the present utility model includes the attaching arms 1221 and the engaging lugs 1222, which are respectively connected to the main body 121 and are spaced apart from each other. The attaching arm 1221 is in clearance fit with the shielding frame 11, so that the shielding case 12 and the shielding frame 11 are attached to each other to enclose the shielding cavity 120. The clamping lugs 1222 are in interference fit with the shielding frame 11, so that the shielding cover 12 and the shielding frame 11 are mutually clamped to realize relative fixing of positions. When the shielding frame 11 and the shielding cover 12 are in furnace returning process, and different deformation amounts are generated due to different thermal expansion coefficients, only the clamping lugs 1222 tightly matched with the shielding frame 11 can apply force to the shielding frame 11, so that the problems of cold joint and off-joint caused by the fact that the shielding frame 11 welded on the circuit board 20 is excessively pulled under the condition of large stress due to the fact that the force applied together with the attaching arms 1221 is large are avoided. Further, in more specific implementation details, the dimension of the engaging arm 1221 along the length of the edge of the main body 121 is greater than the dimension of the catch 1222. The size design can utilize the relatively smaller clamping ear 1222 to realize the relative fixation of the clamping ear 1222 and the shielding frame 11, and when force is applied to the shielding frame 11 due to different thermal expansion coefficients in the furnace returning process, the force generated by the relatively smaller clamping ear 1222 is smaller, and the possibility of cold joint and off-joint of the shielding frame 11 is smaller.

Preferably, in one possible embodiment, the engaging portion 122 is a plate-shaped folded edge extending from the edge of the main body 121, and the folded edge is provided with a notch 123, and the notch 123 divides the folded edge into an engaging arm 1221 and a clip 1222. So set up, can adopt the mode of punching press panel earlier, cut again and make the shield cover 12 that possesses laminating arm 1221 and card ear 1222, the mode of directly adopting the monoblock panel preparation is simple, convenient, is favorable to improving production efficiency and reduce cost. More preferably, the notch 123 extends from the edge of the mating portion 122 away from the main body 121 to the junction between the mating portion 122 and the main body 121, so that the mating portion 122 can be divided into the attaching arm 1221 and the clip 1222.

In another possible embodiment, the notch 123 may also extend from the edge of the mating portion 122 away from the body portion 121, past the intersection of the mating portion 122 and the body portion 121, and into the interior of the body portion 121. In this way, the notch 123 does not end at the junction of the mating portion 122 and the main body portion 121, but continues to extend into the main body portion 121, so that when the clip 1222 applies force to the shielding frame 11 due to thermal deformation, the portion on the main body portion 121 connected with the clip 1222 can also deform to a certain extent due to the interaction force, so as to share part of the stress, make the stress of the shielding frame 11 smaller, and further reduce the risk of cold welding and desoldering of the shielding frame 11.

The number of the notches 123 is not particularly limited, and may be one, two or more. For example, in the possible solution shown in fig. 1, the number of the notches 123 may be two, and the two notches 123 divide the folded edge into two attaching arms 1221 disposed opposite to each other in the longitudinal direction along the edge of the main body 121 (the left-right direction of the drawing plane shown in fig. 1), and one clip 1222 located at the center of the two attaching arms 1221. In this design, the clip 1222 is located at the center of the two attaching arms 1221, so that the clip 1222 applies force to the shield frame 11 from the center of the main body 121 of the shield 12, thereby avoiding the warpage of the shield 12 that may be caused by the force applied from the edge of the main body 121 of the shield 12.

In order to achieve a clearance fit between the engaging arms 1221 and the shielding cage 11, in one possible embodiment, the shielding cage 11 is provided with a convex hull 11a and the engaging arms 1221 are provided with through holes 1221a. The convex hull 11a is at least partially received in the through-hole 1221a and is in clearance fit with the through-hole 1221a. The convex hull 11a and the through hole 1221a are arranged on the shielding frame 11 and the attaching arm 1221, so that the buckling of the shielding frame 11 and the attaching arm 1221 can be realized when the convex hull 11a is at least partially accommodated in the through hole 1221a, the clearance fit between the convex hull 11a and the through hole 1221a can prevent the attaching arm 1221 from being too tightly attached to the shielding frame 11, and the attaching arm 1221 is prevented from applying force to the shielding frame 11 when different deformation amounts are generated due to different thermal expansion coefficients, so that the problem that the shielding frame 11 is not excessively pulled under the condition of larger stress to cause the false soldering and the desoldering is ensured. It will be appreciated that the positions of the convex hull and the through hole may also be interchanged, for example, the convex hull is provided on the attaching arm 1221, and the through hole is provided on the shielding frame 11, so that when the clearance fit between the attaching arm 1221 and the shielding frame 11 is achieved, the convex hull on the attaching arm 1221 is at least partially accommodated in the through hole provided on the shielding frame 11.

To achieve an interference fit between the lugs 1222 and the shielding cage 11, in one possible embodiment, the lugs 1222 are provided with the bosses 1222b shown in fig. 3, and the shielding cage 11 is provided with the recesses 11b shown in fig. 3. The protruding envelope 1222b is at least partially received in the recess 11b and is interference fit with the recess 11b. The convex hull 1222b is matched with the concave pit 11b, so that the convex hull 1222b can smoothly slide into and slide out of the concave pit 11b when the clamping ear 1222 and the shielding frame 11 are combined and disassembled, and the problem that the convex hull 1222b is difficult to disassemble and assemble due to interference fit is solved. Of course, it is understood that the pit 11b may be provided as a through hole when frequent disassembly and assembly are not required.

In order to balance the forces, in a modified embodiment, the two opposite edges of the main body 121 are respectively provided with one engaging portion 122. The matching parts 122 are arranged at two opposite edges of the main body part 121, so that the whole shielding cover 12 is in interference fit with the shielding frame 11 from symmetrical positions, symmetrical distribution of the matching force is ensured, a better fixing effect between the shielding cover 12 and the shielding frame 11 can be achieved, and warping and skew caused by uneven distribution of the matching force are avoided.

The embodiment of the utility model also provides a communication module, which comprises a circuit board 20 provided with a wireless module 30 and the shielding structure 10, wherein the shielding frame 11 is arranged on the circuit board 20 and surrounds the wireless module 30, and the wireless module 30 is accommodated in a shielding cavity 120 formed by the shielding cover 12 and the shielding frame 11.

The embodiment of the utility model also provides a communication device which comprises a shell and the communication module arranged in the shell.

The communication module and the communication device provided by the utility model have the shielding structure, so that the problems of cold joint and off-joint caused by excessive pulling of the shielding frame under a larger stress condition in the furnace passing process can be solved, and the technical principle is the same as that described above and is not repeated herein.

It should be appreciated that the terms "structure," "module," "apparatus," and the like, as used in this disclosure, are merely one method for distinguishing between different components, elements, parts, portions, or assemblies of different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of implementing the present utility model, and in practical application, the technical features of the foregoing embodiments may be combined in any desired manner, and all possible combinations of the technical features of the foregoing embodiments are not described for brevity, however, as long as there is no contradiction between the combinations of the technical features, they should be regarded as the scope of the present description, and various changes may be made in form and detail without departing from the spirit and scope of the present utility model.

Claims

1. A shielding structure, comprising:

the shielding frame is used for being welded on the circuit board and encircling the wireless module on the circuit board;

the shielding cover is arranged on the shielding frame and encloses a shielding cavity for covering the wireless module together with the shielding frame, and the thermal expansion coefficient of the shielding cover is different from that of the shielding frame;

the shielding cover comprises a main body part used for covering the top of the shielding frame, a matching part which is bent from the edge of the main body part, extends and is matched with the shielding frame, the matching part comprises a matching arm and a clamping lug which are respectively connected with the main body part and are mutually separated and independent, the matching arm is in clearance fit with the shielding frame, and the clamping lug is in interference fit with the shielding frame.

2. The shielding structure according to claim 1, wherein the fitting portion is a plate-like folded edge extending from an edge of the main body portion, a notch is provided on the folded edge, and the notch divides the folded edge into the fitting arm and the clip.

3. The shielding structure of claim 2, wherein,

the notch extends from the edge of the matching part to the joint of the matching part and the main body part; or alternatively, the process may be performed,

the notch extends from the edge of the mating portion, across the junction of the mating portion and the main body portion, and into the main body portion.

4. The shielding structure according to claim 2, wherein the number of the notches is two, and the two notches divide the folded edge into two attaching arms disposed opposite to each other in a longitudinal direction along the edge of the main body portion, and one of the engaging lugs is located at a center of the two attaching arms.

5. The shielding structure according to claim 1, wherein one of the fitting arm and the shielding frame is provided with a convex hull, and the other is provided with a through hole corresponding to the convex hull, and the convex hull is at least partially accommodated in the through hole and is in clearance fit with the through hole.

6. The shielding structure according to claim 1 or 5, wherein one of the clip and the shielding frame is provided with a convex hull, and the other is provided with a concave pit corresponding to the convex hull, and the convex hull is at least partially accommodated in the concave pit and is in interference fit with the concave pit.

7. The shielding structure according to claim 1, wherein the fitting arm has a size larger than that of the catch in a length direction along an edge of the main body portion.

8. The shielding structure according to claim 1, wherein the main body portion is provided with one of the engaging portions at opposite edges thereof, respectively.

9. A communication module comprising a circuit board provided with a wireless module and the shielding structure as claimed in any one of claims 1 to 8, wherein the shielding frame is arranged on the circuit board and surrounds the wireless module, and the wireless module is accommodated in a shielding cavity defined by the shielding cover and the shielding frame.

10. A communication device comprising a housing and the communication module of claim 9 disposed within the housing.