Single-sided double-layer circuit board

Abstract

The utility model provides a single-sided double-layer circuit board, which relates to the technical field of circuit boards, and comprises an installation main shell, an upper circuit board and a lower circuit board, the periphery of the bottom end of the upper circuit board is fixedly connected with fixing columns, the bottom ends of the fixing columns are fixedly connected with the top end of the lower circuit board, and a gap is formed between the upper circuit board and the lower circuit board. Mounting holes are formed in the periphery of the outer side of the upper circuit board and the periphery of the outer side of the lower circuit board, the mounting holes are movably arranged on the outer sides of the connecting columns in a sleeving mode, the bottom ends of the connecting columns are fixedly connected into the mounting main shell, and supporting blocks are fixedly connected to the outer sides of the connecting columns and facilitate supporting of the bottom of the lower circuit board; auxiliary supporting pieces are installed on the left side wall and the right side wall of the upper circuit board and the left side wall and the right side wall of the lower circuit board. According to the utility model, the circuit board is provided with a structure capable of supporting the circuit board to be flat, so that a plurality of welding spots at the bottom of the circuit board are not easy to wear during maintenance, and meanwhile, when the components are detached and replaced, unevenness caused by different sizes and heights of the plurality of components during placement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a single-sided double-layer circuit board. Background Art

[0002] A single-sided double-layer PCB is a circuit board design that adds another layer to a single-sided PCB, creating a double-layer structure. This type of PCB is typically compact and has a high level of integration, making it suitable for a wide range of electronic devices.

[0003] In the prior art, when repairing a single-sided double-layer circuit board, when it is necessary to remove damaged components on its surface, it is generally necessary to manually hold the circuit board with one hand with the bottom facing upwards, and then use the other hand to hold the soldering gun to desolder the tin points at the solder joints on the bottom of the circuit board. However, due to the lack of support structures around the outer sides of the circuit board, it is necessary to hold the circuit board for a long time when manually removing components, which will cause hand fatigue. In addition, even if the circuit board is directly placed on the table with the side with multiple components mounted on it facing upwards, the different sizes and heights of the multiple components make it uneven when placed, which seriously affects the desoldering efficiency of the damaged component pins. Such placement will also cause wear and tear on the surface of the components, and even cause damage. Secondly, when installing the circuit board on the inner side of the installation body, the mounting holes provided on all sides of the circuit board are generally respectively arranged on the outside of the preset connecting columns on the inner side of the installation body, and each connecting column is also fixed to the outside of a support block for supporting the bottom of the circuit board. The support block is provided to prevent the pin welding point from directly contacting the inner wall of the installation body, and then the screw hole opened on the top of the connecting column is locked and fixed by screws. However, this fixing method greatly reduces the fixing efficiency, making the circuit board very inconvenient to install. For this reason, a single-sided double-layer circuit board is proposed. Utility Model Content

[0004] The purpose of the utility model is to address the shortcomings of the existing technology and provide a single-sided double-layer circuit board, which achieves stable support through a support structure coordinated with a linkage positioning structure, so as to assist manual desoldering of the pins of damaged components. At the same time, it can also solve the problem of inconvenience in installation caused by fixing the circuit board with screws.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A single-sided double-layer circuit board includes an installation main shell and an upper circuit board and a lower circuit board. The bottom end of the upper circuit board is fixedly connected with fixing columns on all four sides. The bottom ends of the fixing columns are fixedly connected to the top of the lower circuit board. A gap is formed between the upper circuit board and the lower circuit board. The outer sides of the upper circuit board and the lower circuit board are provided with mounting holes on all four sides. The mounting holes are movably sleeved on the outer sides of the connecting columns. The bottom ends of the connecting columns are fixedly connected to the installation main shell. The outer sides of the connecting columns are also fixed with supporting blocks. The supporting blocks are convenient for supporting the bottom of the lower circuit board. Auxiliary support members are installed on the left and right side walls of the upper circuit board and the lower circuit board; it also includes a synchronous positioning member, which is installed on the top of the lower circuit board and connected to the auxiliary support member.

[0007] Optionally, the auxiliary support member includes two symmetrically arranged synchronization rods, both ends of the synchronization rods are fixed with damping shafts, and the damping shafts are rotatably connected to the outer sides of the upper circuit board and the lower circuit board through micro-bearing seats, and the two ends of the rotating shafts on the same side that are away from each other are fixed with supporting foot rods.

[0008] Optionally, blocking blocks are fixedly connected to opposite side walls of the two bearing seats on the same side, and the blocking blocks are used to prevent the supporting foot rod from flipping and limiting.

[0009] Optionally, an anti-skid pad is attached to one end of the supporting leg away from the rotating shaft, and the anti-skid pad is used to increase stability when placed.

[0010] Optionally, an elastic clip is fixedly connected to one side wall of the supporting leg facing the gap, and the elastic clip is clamped in the gap.

[0011] Optionally, the synchronous positioning member includes two symmetrical oblique rings fixed to the outer sides of the two synchronous rods, and both side edges of the outer sides of the oblique rings have an arc-shaped chamfer design.

[0012] Optionally, one side of the oblique ring is provided with a clamping block b fixedly connected to the mounting hole of the lower circuit board, the clamping blocks b are located in the gap, the cross-section of the clamping blocks b is an arc-shaped structure, and one side of the clamping block b is also provided with a clamping block a of the same shape and structure, and a rubber pad is provided on the arc-shaped clamping surface of the clamping block a.

[0013] Optionally, a guide rod with a convex vertical cross-section is fixedly connected to the side of the clamping block a facing away from the clamping block b, and the guide rod is slidably sleeved with a guide seat, and the bottom end of the guide seat is fixedly connected to the top of the lower circuit board.

[0014] Optionally, a connecting rod is fixed to the side wall of the guide rod away from the mounting hole, and two symmetrically arranged micro rollers are provided on the end of the connecting rod away from the guide rod, and the micro rollers are rotatably connected to the connecting rod via a rotating shaft.

[0015] Optionally, two micro rollers rotatably connected to the same connecting rod are movably overlapped on the inclined surfaces on both sides of the inclined ring.

[0016] The beneficial effects of the present invention are:

[0017] The utility model provides an auxiliary support member, and when repairing the double-layer circuit board, the four supporting legs can be manually rotated away from the bottom of the circuit board synchronously, and the blocking block is provided so that the four supporting legs are arranged perpendicularly to the circuit board. After that, the bottom of the circuit board can be turned upward, and the anti-skid pads provided at the bottom ends of the four supporting legs can be placed on the external maintenance table. On the one hand, it can ensure the flatness of the circuit board when removing components, and avoid holding the circuit board for desoldering and removing components, which seriously affects the efficiency of repair. At the same time, such a setting can also The invention can protect multiple components of different sizes and heights to avoid friction between the components and the external maintenance table. Secondly, when it is necessary to inspect and repair multiple components on one side of the circuit board, the four supporting legs can be manually rotated away from the top of the circuit board, so that multiple components on the top of the circuit board can be inspected. Such a support setting can avoid damage caused by friction between the multiple solder joints at the bottom of the circuit board and the external maintenance table. Thirdly, the four supporting legs can be folded parallel to the outside of the circuit board when not in use, and are clamped to the gap of the circuit board by elastic clips.

[0018] The utility model adopts the setting of synchronous positioning parts, so that during the process of folding and storing the above-mentioned four supporting foot rods, the two synchronous rods can drive the two symmetrically arranged oblique rings to rotate, and the oblique rings cooperate with the setting of two micro rollers, so that the clamping blocks b connected to the connecting rods through the guide rods can be moved synchronously in the direction of the clamping block a, so that each clamping block b can clamp and fix the connecting column with the corresponding clamping block a, thereby achieving the effect of conveniently fixing the circuit board without the need for screws, which doubles the fixing efficiency.

[0019] In summary, the present invention has a structure that can support and level the circuit board, which can prevent the multiple solder joints on the bottom of the circuit board from being worn out during maintenance. At the same time, when removing and replacing components, it can avoid the problem of uneven placement due to the different volumes and heights of multiple components, which seriously affects the desoldering efficiency of damaged component pins. At the same time, it can also improve the efficiency of fixing the circuit board in the main installation shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model after overall installation;

[0021] Figure 2 A three-dimensional schematic diagram of the circuit board of the present invention being removed from the main housing;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of some components of the fixed column, gap and auxiliary support member of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the second component of the auxiliary support member of the utility model;

[0024] Figure 5 This is an enlarged schematic diagram of point A of the present utility model;

[0025] Figure 6 B is an enlarged schematic diagram of the utility model;

[0026] Figure 7 This is a planar schematic diagram of the micro roller and oblique ring of the utility model.

[0027] In the figure: 1. Install the main shell; 2. Connecting column; 21. Support block; 3. Upper circuit board; 31. Fixed column; 32. Lower circuit board; 4. Auxiliary support; 41. Synchronous rod; 42. Damping shaft; 43. Support foot rod; 44. Anti-slip pad; 45. Elastic clip; 46. Block block; 5. Synchronous positioning piece; 51. Oblique ring; 52. Micro roller; 53. Rotating shaft; 54. Connecting rod; 55. Guide rod; 56. Guide seat; 57. Clamping block a; 58. Clamping block b. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] Example 1

[0031] like Figures 1 to 2 As shown, this embodiment provides a single-sided double-layer circuit board, including an installation main shell 1 and an upper circuit board 3 and a lower circuit board 32. The bottom end of the upper circuit board 3 is fixedly connected with fixing columns 31 on all sides. The bottom ends of the fixing columns 31 are fixedly connected to the top of the lower circuit board 32. A gap is formed between the upper circuit board 3 and the lower circuit board 32. The outer sides of the upper circuit board 3 and the lower circuit board 32 are provided with mounting holes on all sides. The mounting holes are movably sleeved on the outer sides of the connecting columns 2. The bottom ends of the connecting columns 2 are fixedly connected to the installation main shell 1. The outer sides of the connecting columns 2 are also fixed with support blocks 21. The support blocks 21 facilitate lifting the bottom of the lower circuit board 32. Auxiliary support members 4 are installed on the left and right side walls of the upper circuit board 3 and the lower circuit board 32; it also includes a synchronous positioning member 5, which is installed on the top of the lower circuit board 32 and connected to the auxiliary support member 4.

[0032] Example 2

[0033] like Figures 3 and 4 As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0034] In order to ensure the stability of the circuit board when it is placed when repairing components or desoldering the bottom solder joints, the auxiliary support member 4 is provided with two symmetrically arranged synchronization rods 41, and the two ends of the synchronization rod 41 are fixedly connected to the damping shaft 42, and the damping shaft 42 is rotatably connected to the outer side of the upper circuit board 3 and the lower circuit board 32 through a micro bearing seat. The two ends of the rotating shaft 53 on the same side are fixedly connected to the supporting foot rod 43, and the two side walls of the bearing seats on the same side are fixedly connected to the opposite side. The blocking block 46 is used to block the flipping limit of the supporting foot rod 43, and the end of the supporting foot rod 43 away from the rotating shaft 53 is pasted with an anti-slip pad 44, and the anti-slip pad 44 is used to increase stability during placement, and the side wall of the supporting foot rod 43 facing the gap is fixedly connected with an elastic clip 45, and the elastic clip 45 is made of rubber material, and the elastic clip 45 is clamped in the gap.

[0035] Among them, the setting of the damping shaft 42 can ensure that the supporting foot rod 43 is not easy to move without external force after being flipped upward or downward by ninety degrees, and in combination with the setting of the elastic clip 45, the supporting foot rod 43 can be folded parallel to the circuit board to ensure the stability of the supporting foot rod 43 after folding. The setting of the anti-slip pad 44 can enhance the stability of the support when placed on an external maintenance table.

[0036] Example 3

[0037] like Figures 4 to 7 As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The differences between the third embodiment and the first embodiment are:

[0038] In order to be able to quickly fix the circuit board between the four connecting columns 2 when the four supporting legs 43 mentioned in the above-mentioned embodiment 2 are folded parallel to the circuit board, thereby greatly improving the fixing and installation efficiency, the synchronous positioning member 5 is provided to include two symmetrical oblique rings 51 fixed to the outside of the two synchronous rods 41, and the outer side edges of the oblique rings 51 have an arc-shaped chamfer design. One side of the oblique ring 51 is provided with a clamping block b58 fixed to the mounting hole of the lower circuit board 32, and the clamping blocks b58 are all located in the gap. The cross section of the clamping blocks b58 is an arc-shaped structure. One side of the clamping block b58 is also provided with a clamping block a57 of the same shape structure. The arc-shaped clamping surface of block a57 is provided with a rubber pad, and the side of the clamping block a57 facing away from the clamping block b58 is fixedly connected to a guide rod 55 with a convex vertical cross-section. The guide rod 55 is slidably sleeved with a guide seat 56, and the bottom end of the guide seat 56 is fixed to the top of the lower circuit board 32. The side wall of the guide rod 55 away from the mounting hole is fixed with a connecting rod 54, and the end of the connecting rod 54 away from the guide rod 55 is provided with two symmetrically arranged micro rollers 52, and the micro rollers 52 are rotatably connected to the connecting rod 54 through a rotating shaft 53. The two micro rollers 52 rotatably connected on the same connecting rod 54 are movably overlapped on the inclined surfaces on both sides of the inclined ring 51.

[0039] Among them, both ends of the micro roller 52 are set with arc chamfers. This setting makes the micro roller 52 and the inclined surface of the bevel ring 51 have single-point contact, making the sliding fit smoother. In addition, after the four mounting holes of the circuit board are respectively arranged on the outside of the connecting column 2, the arc-shaped clamping surface of the clamping block b58 is fitted on the outside of the connecting column 2, and then the clamping block a57 is moved toward the clamping block b58 to achieve its clamping and fixing efficiency. The rubber pad can increase the friction force of clamping and fixing, so that the fixing effect is better.

[0040] Working steps

[0041] Step 1: When the double-layer circuit board needs to be repaired, the four supporting legs 43 can be manually rotated away from the bottom of the circuit board at the same time, and the blocking block 46 is set to make the four supporting legs 43 and the circuit board vertical. Then the bottom of the circuit board is facing upwards, and the anti-slip pads 44 provided at the bottom ends of the four supporting legs 43 are placed on the external maintenance table. This method can ensure the flatness of the circuit board when removing components, and avoid holding the circuit board for desoldering and removing components, which seriously affects the efficiency of maintenance. At the same time, this method can also protect the multiple anti-slip pads installed on the top of the circuit board. On the one hand, the components with different sizes and heights can be protected to avoid friction between the components and the external maintenance table. On the other hand, when it is necessary to inspect and repair multiple components on one side of the circuit board, the four supporting legs 43 can be manually rotated away from the top of the circuit board, so that multiple components on the top of the circuit board can be inspected. Such a support setting can avoid damage caused by friction between the multiple solder joints at the bottom of the circuit board and the external maintenance table. On the third hand, the four supporting legs 43 can be folded parallel to the outside of the circuit board when not in use, and are clamped to the gap of the circuit board by the elastic clip 45.

[0042] Step 2: When the circuit board needs to be installed on the four connecting columns 2 in the main housing 1, the four support rods can be rotated upward by 90 degrees first, so that the two synchronous rods 41 drive the two symmetrically arranged oblique rings 51 to rotate, and the oblique rings 51 cooperate with the arrangement of the two micro rollers 52, so that the clamping blocks b58 connected to the connecting rods 54 through the guide rods 55 can be synchronously moved away from the clamping block a57 and unfolded. After that, the installer can hold the four supporting foot rods 43 and set the mounting holes one by one on the outside of the corresponding connecting columns 2 of the main housing 1. After that, the four supporting foot rods 43 can be moved in The rows are folded parallel to the circuit board, so that the two synchronization rods 41 drive the two symmetrically arranged oblique rings 51 to rotate in the opposite direction to the above-mentioned direction, and cooperate with the setting of the two micro rollers 52, so that the connecting rods 54 can move synchronously in the direction of the clamping block a57 through the clamping block b58 connected by the guide rod 55, so that each clamping block b58 can clamp and fix the connecting column 2 with the corresponding clamping block a57. In addition, the supporting foot rods 43 are fixed in the gap by elastic clips 45, so as to achieve the effect of conveniently fixing the circuit board without the need for screws, which doubles the fixing efficiency.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A single-sided double-layer circuit board, comprising a mounting main housing and an upper circuit board and a lower circuit board, wherein fixing posts are fixedly connected to the bottom end of the upper circuit board on all sides, and the bottom ends of the fixing posts are fixedly connected to the top end of the lower circuit board, forming a gap between the upper circuit board and the lower circuit board, and mounting holes are formed on the outer sides of the upper circuit board and the lower circuit board, and the mounting holes are movably sleeved on the outer sides of the connecting posts, and the bottom ends of the connecting posts are fixed to the mounting main housing, and the outer sides of the connecting posts are also fixedly connected to the supporting blocks, which facilitate supporting the bottom of the lower circuit board, and characterized in that auxiliary support members are installed on the left and right side walls of the upper circuit board and the lower circuit board; It also includes a synchronous positioning member, which is installed on the top end of the lower circuit board and connected to the auxiliary supporting member.

2. The single-sided double-layer circuit board according to claim 1, characterized in that: The auxiliary support member includes two symmetrically arranged synchronization rods, both ends of which are fixed with damping shafts, and the damping shafts are rotatably connected to the outer sides of the upper circuit board, the lower circuit board, and the supporting foot rods through micro bearing seats.

3. The single-sided double-layer circuit board according to claim 2, characterized in that: A blocking block is fixedly connected to the side walls of the two bearing seats on the same side that are away from each other, and the blocking block is used to block the support leg rod from turning over and limiting.

4. The single-sided double-layer circuit board according to claim 3, characterized in that: The support leg rods are pasted with anti-skid pads, which are used to increase stability when placed.

5. The single-sided double-layer circuit board according to claim 4, characterized in that: An elastic clip is fixedly connected to one side wall of the supporting leg rod facing the gap, and the elastic clip is clamped in the gap.

6. The single-sided double-layer circuit board according to claim 2, characterized in that: The synchronous positioning member includes two symmetrical oblique rings fixedly connected to the outer sides of the two synchronous rods, and both side edges of the outer sides of the oblique rings have an arc-shaped chamfer design.

7. The single-sided double-layer circuit board according to claim 6, characterized in that: One side of the oblique ring is provided with a clamping block b fixedly connected to the mounting hole of the lower circuit board. The clamping blocks b are located in the gap. The cross-section of the clamping blocks b is an arc-shaped structure. One side of the clamping block b is also provided with a clamping block a of the same shape and structure. The arc-shaped clamping surface of the clamping block a is provided with a rubber pad.

8. The single-sided double-layer circuit board according to claim 7, characterized in that: A guide rod with a convex vertical cross-section is fixedly connected to the side of the clamping block a facing away from the clamping block b. The guide rods are slidably sleeved with guide seats, and the bottom ends of the guide seats are fixedly connected to the top end of the lower circuit board.

9. The single-sided double-layer circuit board according to claim 8, characterized in that: A connecting rod is fixedly connected to the side wall of the guide rod away from the mounting hole, and two symmetrically arranged micro rollers are provided on the end of the connecting rod away from the guide rod, and the micro rollers are rotatably connected to the connecting rod through a rotating shaft; the supporting foot rod is installed on the opposite ends of the two rotating shafts on the same side.

10. The single-sided double-layer circuit board according to claim 9, characterized in that: Two micro rollers rotatably connected to the same connecting rod are movably overlapped on the inclined surfaces on both sides of the inclined ring.

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