Structure for eliminating installation stress of circuit board

Abstract

The utility model discloses a structure for eliminating installation stress of a circuit board, which relates to the related technical field of the circuit board, and comprises an upper cover and a lower shell which are detachably connected, and further comprises the circuit board, the circuit board is positioned between the upper cover and the lower shell, a connecting column connected with the circuit board is arranged in the lower shell, and the connecting column is connected with the circuit board. The circuit board is provided with a connecting hole for the connecting column to pass through, and the connecting column is connected with a fastener for fixing the circuit board; according to the utility model, the circuit board is supported by the connecting column, the connecting column penetrates through the circuit board and is connected with the fastener, and when the circuit board is fixed, the circuit board is not in strong fixed contact with the fastener, so that a certain buffer space can be provided, installation stress can be avoided, and the fastener can be effectively fastened.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, and in particular to a structure for eliminating circuit board mounting stress. Background Technology

[0002] Flexible printed circuit boards (FPCs) used in computers, also known as flexible circuit boards or flexographic circuit boards, have advantages such as high wiring density, light weight, thinness, less wiring space constraints, and high flexibility. They perfectly align with the trend towards thinner and smaller electronic products, and are therefore widely used in PCs and peripherals, communication products, displays, and consumer electronics. However, because FPCs are inherently bendable, installation requires...

[0003] Without using any elastomer filler, the circuit board is directly fixed to the bottom support. Due to manufacturing reasons, the multiple support surfaces at the bottom are not on the same plane. After fixing, the circuit board will have certain vertical stress. When the circuit board is large, the distance between the bottom support points is far, and the height error of the fixing surface is even greater, which will make this stress more prominent.

[0004] Among them, a PCB circuit board with stress relief function with patent number CN206413255U is filled with an elastomer between the circuit board and the fixing point and is fastened with bolts. However, in actual use, the filling of the elastomer between the circuit board and the fixing point cannot guarantee the effective fastening of the bolts, because the elastomer will compress or rebound. When the bolt loses static torque, it will slowly come out, causing the circuit board to fail to be fixed. On the other hand, an instrument internal circuit board shock absorption and support structure with patent number CN219577482U avoids the stress generated by installation and vibration by using an elastomer. The mounting column passes through the elastomer and is directly connected to the pressure plate, avoiding the loosening of the fixation. It effectively solves the stress problem and the loosening problem in subsequent use. However: (1) The elastomer in the patent is only suitable for installation on a semi-open circuit board. When the circuit board is large and needs to be fixed in the middle, this structure cannot be used. (2) This structure must be used in conjunction with a pressure plate. At this time, the pressure plate, which is not usually needed, is added, which increases the cost and reduces the space utilization. Utility Model Content

[0005] Purpose of the invention: The purpose of this utility model is to provide a structure for eliminating circuit board installation stress, which solves the problem that the use of elastomers in existing solutions to solve stress problems leads to limitations in the size and shape of circuit board openings, and effectively solves the problem of large circuit board installation stress.

[0006] Technical solution:

[0007] A structure for relieving circuit board mounting stress includes a detachably connected upper cover and a lower housing, and a circuit board located between the upper cover and the lower housing. The lower housing has a connecting post for connecting the circuit board, and the circuit board has a connecting hole for the connecting post to pass through. Fasteners for fixing the circuit board are connected to the connecting post.

[0008] Preferably, the connecting column includes a lower support column and an upper connecting column, the lower support column and the upper connecting column are fixedly connected, the lower support column and the lower housing are fixedly connected, and the upper connecting column passes through the connecting hole.

[0009] Preferably, the upper connecting post has an upward-facing mounting hole, and the fastener passes through the connecting hole and the mounting hole for connection.

[0010] Preferably, an elastic element is provided on the upper connecting post, and the elastic element abuts against the circuit board.

[0011] Preferably, the lower housing has an upward-opening accommodating cavity, and the lower support column is fixedly connected to the bottom wall of the accommodating cavity.

[0012] Preferably, the connecting posts are provided in multiple quantities.

[0013] Beneficial effects: The circuit board is supported by connecting posts, which pass through the circuit board and fasteners. When the circuit board is fixed, it is not in strong contact with the fasteners, which provides a certain buffer space to avoid installation stress and allows the fasteners to be effectively tightened. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting column of this utility model;

[0016] Reference numerals: 11. Top cover; 12. Circuit board; 13. Fastener; 14. Elastic element; 15. Lower housing; 151. Lower support column; 152. Accommodating cavity; 153. Upper connecting column; 154. Mounting hole. Detailed Implementation

[0017] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] Example 1

[0021] like Figure 1 As shown, a structure for eliminating circuit board mounting stress includes a detachably connected upper cover 11 and lower housing 15, with a space between the lower housing 15 and the upper cover 11. This application also includes a circuit board 12, which is located between the lower housing 15 and the upper cover 11, and the circuit board 12 and the lower housing 15 are detachably connected.

[0022] The lower housing 15 has a connecting post that connects to the circuit board 12. The circuit board 12 has a connecting hole 121 for the connecting post to pass through. When the circuit board 12 is installed, the connecting post passes through the connecting hole 121 and supports the circuit board 12. It also includes a fastener 13, which is connected to the connecting post and prevents the circuit board 12 from detaching from the connecting post.

[0023] In this application, fastener 13 is a bolt. Fasteners can be replaced by other means, such as a snap-fit ​​structure with a back buckle at the end of the upper support column, self-tapping screws, bolts and nuts, etc., as long as they can effectively limit the vertical movement.

[0024] The connecting column includes a lower support column 151 and an upper connecting column 153. The lower support column 151 and the upper connecting column 153 are fixedly connected. The lower support column 151 is fixedly connected to the lower housing 15. The upper connecting column 153 passes through the connecting hole 121. The upper end of the lower support column 151 abuts against the end face of the circuit board 12. The adjustment range of the circuit board 12 is limited to the height range of the upper connecting column 153.

[0025] like Figure 2 As shown, the upper connecting post 153 has an upward-opening mounting hole 154. When the circuit board 12 is fitted onto the upper connecting post 153, the fastener 13 passes through the connecting hole 121 and the mounting hole 154 and connects. The upper end of the fastener 13 is larger than the size of the connecting hole 121. When the fastener 13 is fixed, the circuit board 12 cannot be detached from the upper connecting post 153. The upper connecting post 153 increases its static torque after the fastener 13 is installed.

[0026] The fasteners can be replaced by other methods, such as snap-fit ​​structures with undercuts at the ends of the upper support columns, self-tapping screws, bolts and nuts, etc., as long as they can effectively limit movement in the vertical direction.

[0027] Furthermore, an elastic element 14 is provided on the upper connecting column 153, and the elastic element 14 abuts against the circuit board 12. After the fastener is installed, the pressure of the circuit board will be automatically adjusted according to the two elastic elements to avoid stress generation. The preferred elastic element is an annular washer, and its material has compressible elasticity and can maintain a certain compressive elasticity for a long time. The thickness, hardness and elasticity of the elastic element are determined according to the product requirements.

[0028] The lower housing 15 has an upward-opening accommodating cavity 152. Lower support columns 151 are fixedly connected to the bottom wall of the accommodating cavity 152. Several connecting columns are provided, and each lower support column 151 is fixedly connected to the bottom wall of the accommodating cavity 152. The lower support columns 151 are arranged in an array. The circuit board 12, after being connected to the upper connecting columns 153, is also accommodated within the accommodating cavity 12. The above embodiments only illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A structure for eliminating mounting stress of a circuit board, comprising an upper cover (11) and a lower case (15) which are detachably connected, characterized in that: Also include a circuit board (12), the circuit board (12) is located between the upper cover (11) and the lower shell (15), the lower shell (15) is provided with and the connecting post connected with the circuit board (12), the circuit board (12) is provided with the connecting hole (121) for the connecting post passes through, the connecting post is connected with the fastener (13) for fixing circuit board (12).

2. The structure for eliminating stress of mounting a circuit board according to claim 1, wherein: The connecting post includes a lower support column (151) and an upper connecting column (153), the lower support column (151) and the upper connecting column (153) are fixedly connected, the lower support column (151) and the lower shell (15) are fixedly connected, and the upper connecting column (153) passes through the connecting hole (121).

3. The structure for eliminating stress of mounting a circuit board according to claim 2, wherein: The upper connecting column (153) is provided with an installation hole (154) opening upward, and the fastener (13) passes through the connecting hole (121) and the installation hole (154) and is connected.

4. The structure for eliminating stress of mounting a circuit board according to claim 2, wherein: The upper connecting column (153) is provided with an elastic member (14) penetratingly arranged, and the elastic member (14) abuts against the circuit board (12).

5. The structure for eliminating stress of mounting a circuit board according to claim 2, wherein: The lower shell (15) is provided with an accommodating cavity (152) opening upward, and the lower support column (151) is fixedly connected with the bottom wall of the accommodating cavity (152).

6. The structure for eliminating stress of mounting a circuit board according to claim 5, wherein: The connecting post is provided with a plurality of.

Images