Audio and video transmission equipment

Abstract

An audio and video transmission device disclosed by the present invention comprises a case structure and a functional card board installed in the case structure, the functional card board comprises a plurality of PCBs, the top of each PCB is provided with an upper seam allowance, the upper seam allowance is buckled and connected with a first clamping groove in the case structure, the side part of each PCB is provided with a left seam allowance, and the left seam allowance is buckled and connected with a second clamping groove in the case structure. A plurality of left spigots are formed in the bottom of the PCB, the left spigots are connected with second clamping grooves in the case structure in a buckled mode, a plurality of lower spigots are formed in the bottom of the PCB, and the lower spigots are connected with third clamping grooves in the case structure in a buckled mode so that the PCB can be fixed into the case structure in a buckled mode. The audio and video transmission device has the advantages of being compact in structure, convenient to disassemble and assemble, low in cost and the like, the PCB can be installed and fixed without screws and screw columns, more space is provided for wiring layout of the PCB, and the overall size of the audio and video transmission device can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of audio and video transmission, and in particular to an audio and video transmission device. Background Art

[0002] As the requirements for audio and video transmission become higher and higher, more and more hardware structures need to be integrated in audio and video transmission equipment, and more and more PCB board hardware units need to be installed in the chassis of existing audio and video transmission equipment. At present, the PCB boards of existing products are basically fixed by screws + screw columns to facilitate disassembly and maintenance. However, this structural fixing form has the following shortcomings:

[0003] 1. Since the internal space of the chassis is relatively small, the spatial layout of the overall structure is very limited. In addition, many PCB boards are very narrow, and many signal lines need to be routed while large currents need to be passed. The screw + screw column fixing method is difficult to meet the requirements of electrical performance.

[0004] 2. Because of the existence of one or more screw holes, the space for the PCB board to pass through is occupied, making it impossible to implement the wiring layout. For example, in a 2U server for audio and video transmission equipment, the number of PCB boards can reach 23. For a 3U server with stronger processing power and more comprehensive functions, the number of PCB boards will be even greater. However, audio and video transmission equipment requires the size of the chassis structure to be smaller and smaller, so the layout of the entire chassis space is even more cramped.

[0005] 3. Because of the existence of one or more screw columns, it is very inconvenient to add copper bars with excessive current. Because the copper bar must pass through the entire PCB board to ensure the power supply of each business card in the equipment, it will interfere with the screw column during the penetration process. If the copper bar is cut off to bypass the screw column, the overload capacity of the current will be limited at the cutoff point, which loses the meaning of excessive current.

[0006] 4. The screw + screw column structure requires a lot of small parts for the entire device, which not only makes the installation complicated, cumbersome and inefficient, but also makes it difficult to find the small parts once they fall into the narrow chassis. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an audio and video transmission device with a compact structure, convenient assembly and disassembly and low cost, in view of the problems that the fixing method of the PCB board in the existing audio and video transmission equipment leads to unreasonable wiring layout, is inconvenient to add copper bars with excessive current, and the overall volume of the equipment is too large.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A device includes a chassis structure and a functional card board installed in the chassis structure, wherein the functional card board includes multiple PCB boards, an upper stopper is provided on the top of the PCB board, and the upper stopper is snap-fitted with a first slot in the chassis structure, a left stopper is provided on the side of the PCB board, and the left stopper is snap-fitted with a second slot in the chassis structure, and multiple lower stops are provided at the bottom of the PCB board, and the lower stops are snap-fitted with a third slot in the chassis structure, so that the PCB board is snap-fitted and fixed to the chassis structure.

[0010] As a further improvement of the present invention, a copper bar and a power input port are provided at the lower part of the back side of the PCB board, the copper bar is arranged along the length direction of the PCB board, and the power input port is located on one side of the copper bar.

[0011] As a further improvement of the present invention, a plurality of business card board sockets are provided at the lower front portion of the PCB board for connecting business card boards.

[0012] As a further improvement of the present invention, a main control board socket is provided on the front side of the PCB board for connecting a main control card.

[0013] As a further improvement of the present invention, a power module is arranged on the left side of the lower part of the PCB board, and the power lines gradually decrease from left to right to respectively supply power to the main control card and multiple business card boards. A network signal line is arranged on the right side of the lower part of the PCB board, and the network signal lines gradually increase from left to right and converge to the main control board socket to be connected to the main control card.

[0014] As a further improvement of the present invention, the chassis structure includes an upper cover plate and a bottom shell, and the PCB board is buckled and fixed between the end of the upper cover plate and the end of the bottom shell.

[0015] As a further improvement of the present invention, a first card slot is provided at the end of the upper cover plate, and a second card slot and a plurality of third card slots are respectively provided at the end of the bottom shell.

[0016] As a further improvement of the present invention, a plurality of support plates are further provided in the chassis structure, the two ends of the support plates are respectively connected and fixed to the upper cover plate and the bottom shell, and the support plates are located on the front side of the PCB board to support and limit the PCB board.

[0017] As a further improvement of the present invention, a limiting step is provided at the lower part of the support plate, and the height of the limiting step matches the height of the lower part of the PCB board. When the PCB board is installed and fixed, the lower part of the PCB board is located inside the limiting step.

[0018] As a further improvement of the present invention, connection holes are provided at both ends of the support plate to achieve detachable connection between the support plate and the upper cover plate and the bottom shell.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The audio and video transmission device of the present invention has a plurality of stoppers on the outer side of the U-shaped PCB board, and the stoppers cooperate with the card slot limiting structure in the chassis structure, so that the PCB board is installed and fixed without screws, which provides more space for the wiring layout of the PCB board, and is also conducive to the layout and penetration of high-current copper bars, thereby reducing the overall volume of the audio and video transmission device.

[0021] 2. The audio and video transmission device of the present invention not only meets the demand for excessive current but also supports the PCB board by arranging a copper bar on the back of the PCB board. At the same time, the front of the PCB board is limitedly supported by a support plate arranged in the chassis structure. The arrangement of the copper bar and the support plate significantly improves the strength of the PCB board, almost eliminates the possibility of its deformation, and ensures that the PCB board is firmly and securely installed in the chassis structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structural principle of an audio and video transmission device in a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structural principle of a PCB board in a specific embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the partial structural principle of the upper cover plate in a specific embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the partial structural principle of the bottom shell in a specific embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the partial structure principle of the bottom shell from another perspective in a specific embodiment of the present invention;

[0027] Figure 6 It is a rear view of the chassis structure in a specific embodiment of the present invention;

[0028] Figure 7 for Figure 6 Schematic diagram of the structural principle at A in the middle;

[0029] Figure 8 for Figure 6 Schematic diagram of the structural principle at B in the middle;

[0030] Fig. 9 A front view of the chassis structure in a specific embodiment of the present invention;

[0031] Fig.10 A schematic diagram of the structural principle of installing a service card board on a PCB board in a specific embodiment of the present invention;

[0032] Fig.11Schematic diagram of the structural principle of the support plate in a specific embodiment of the present invention; wherein Figure (a) is a main view and Figure (b) is a stereogram;

[0033] Fig.12 This is a schematic diagram of the assembly of the support plate and the PCB board in a specific embodiment of the present invention;

[0034] Fig.13 This is a schematic diagram of the power supply wiring inside the PCB board in a specific embodiment of the present invention, where the shaded portion in the figure represents the power supply wiring;

[0035] Fig.14 This is a schematic diagram of the internal network routing of a PCB board in a specific embodiment of the present invention, where the shaded portion represents the network routing;

[0036] Legend: 100, PCB board; 101, upper stop; 102, left stop; 103, lower stop; 104, copper bar; 105, power input port; 106, business card board socket; 107, main control board socket; 200, chassis structure; 201, upper cover; 202, bottom shell; 203, support plate; 2031, connecting hole; 2032, limiting step; 204, fastening screw; 205, first card slot; 206, second card slot; 207, third card slot; 300, business card board. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0038] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0040] Example

[0041] like Figure 1 and Figure 2 As shown, the audio and video transmission device of the present invention includes a chassis structure 200 and a functional card board installed in the chassis structure 200, the functional card board includes multiple U-shaped PCB boards 100, the top of the PCB board 100 is provided with an upper stopper 101, the upper stopper 101 is snap-fitted and connected with a first slot 205 in the chassis structure 200, the side of the PCB board 100 is provided with a left stopper 102, the left stopper 102 is snap-fitted and connected with a second slot 206 in the chassis structure 200, and the bottom of the PCB board 100 is provided with multiple lower stops 103, the lower stops 103 are snap-fitted and connected with a third slot 207 in the chassis structure 200, so as to realize that the PCB board 100 is snap-fitted and fixed to the chassis structure 200.

[0042] In this embodiment, by providing a plurality of stoppers on the outer side of the U-shaped PCB board 100, the stoppers cooperate with the card slot limit structure in the chassis structure 200, so that the PCB board 100 is installed and fixed without screws, which provides more space for the wiring layout of the PCB board 100, and is also beneficial to the layout and penetration of high-current copper bars, thereby reducing the overall volume of the audio and video transmission equipment.

[0043] In this embodiment, a copper bar 104 and a power input port 105 are provided at the lower part of the back of the PCB board 100. Two copper bars 104 are soldered to the lower part of the PCB board 100 along the length direction of the PCB board 100, one for each positive and negative current poles. The copper bars 104 can both realize excessive current and provide support for the PCB board 100 to prevent the PCB board 100 from deforming due to its large size. The power input port 105 is located on one side of the copper bar 104, and the power input port 105 is located at the lower right part of the PCB board 100.

[0044] like Fig. 9 and Fig.10 As shown, a plurality of service card mother sockets 106 are provided at the lower front of the PCB board 100 for connecting the gold fingers of the service card board 300. A main control board mother socket 107 is provided at the side of the front of the PCB board 100 for connecting the gold fingers of the main control card.

[0045] In this embodiment, the PCB board 100 serves as a bridge between the service card board 300 and the main control card. There are as many as 18 service card boards 300, so hundreds of signal lines need to be routed out of the PCB board 100. The number of layers of the PCB board 100 is as high as 14 layers, that is to say, a total of 14 PCB boards 100 are arranged in the chassis structure 200 of this embodiment. Because each service card board 300 needs an outlet, the PCB board in this embodiment is a U-shaped structure, leaving a very narrow space for routing. Therefore, screw holes cannot be arranged on the PCB board, and in order to ensure that each service card board 300 has a sufficiently large current and stable power supply, two copper strips 104 are arranged on the back of the PCB board.

[0046] like Fig.13 and Fig.14 As shown, a power module is arranged on the left side of the lower part of the PCB board 100, and the power lines gradually decrease from left to right to respectively supply power to the main control card and multiple business card boards 300. Network signal lines are arranged on the right side of the lower part of the PCB board 100, and the network signal lines gradually increase from left to right and converge to the main control board socket 107 to connect to the main control card.

[0047] In this embodiment, the left side of the PCB board 100 is designed as a power module, and the right side is designed as a main control card. Fig.13 As shown, the power supply starts from the V+ / V- on the left side and gradually decreases from left to right, supplying power to 18 business card boards 300 and 1 main control card respectively; Fig.14 As shown, the network signal lines of the 18 service card boards 300 and the main control card gradually increase from left to right and converge to the rightmost main control board socket 107 to connect to the main control card. Through the above distributed layout with the power supply on the left and the main control card on the right, the power supply wiring and the network wiring are staggered, the wiring area of ​​the PCB board 100 is utilized as much as possible, the number of layers of the PCBLayout is reduced, thereby reducing the manufacturing cost, and also helping to reduce the overall volume of the chassis structure 200.

[0048] like Figure 1 As shown, the chassis structure 200 of this embodiment includes an upper cover plate 201 and a bottom shell 202 , and the PCB board 100 is buckled and fixed between the end of the upper cover plate 201 and the end of the bottom shell 202 .

[0049] like Figure 3 , Figure 4 and Figure 5 As shown, the upper cover plate 201 has a first slot 205 at its end, and the bottom shell 202 has a second slot 206 and a plurality of third slots 207 at its end. Figure 6 , Figure 7 and Figure 8As shown, the upper stop 101 is snap-fitted with the first slot 205, the left stop 102 is snap-fitted with the second slot 206, and the lower stop 103 is snap-fitted with the third slot 207, so that the PCB board 100 is installed and fixed to the chassis structure 200 by a non-screw fixing method.

[0050] In the chassis structure 200, a large number of service card boards 300 are often integrated. In this embodiment, the number of service card boards 300 is as many as 18. At the same time, two main control cards are also provided in the chassis structure 200 system for centralized management of these card boards, and the whole machine has as many as 20 card boards. Each service card board 300 needs to communicate and transmit data with the main control card in both directions, and the power module also needs to supply power to each service card board 300 through the U-shaped PCB board. At the same time, each service card board 300 also needs to have an external interface (at least 3 interfaces). In order to expose these interfaces, the PCB board 100 forms a U shape, and the wiring area left for communication and power supply becomes extremely narrow.

[0051] like Fig. 9 As shown, three support plates 203 are further provided in the chassis structure 200 , and the two ends of the support plates 203 are respectively connected and fixed to the upper cover plate 201 and the bottom shell 202 , and the support plates 203 are located on the front side of the PCB board 100 to support and limit the PCB board 100 .

[0052] Since the U-shaped PCB board 100 is very long and narrow in the middle, in order to prevent the U-shaped PCB board from being deformed during the plugging and unplugging of the service card board 300, three support plates 203 and two high-current copper bars 104 are designed in this embodiment to assist in fixing the U-shaped PCB board. Fig.12 As shown, the support plate 203 can limit the displacement space above / to the right of the U-shaped PCB board, the bottom shell 202 can limit the displacement space below the U-shaped PCB board, and the two large current copper bars 104 are fixed to the U-shaped PCB board by soldering. Since the copper bar 104 is a hard metal component and runs through the entire U-shaped PCB board, the U-shaped PCB board is more solid and does not deform. The copper bar 104 can limit the displacement space on the left side of the U-shaped PCB board. At this point, the U-shaped PCB board is limited in four directions of up, down, left and right to ensure that the U-shaped PCB board is firmly installed in the chassis structure.

[0053] like Fig.11 and Fig.12 As shown, a limiting step 2032 is provided at the lower portion of the support plate 203 , and the height of the limiting step 2032 matches the height of the lower portion of the PCB board 100 . When the PCB board 100 is installed and fixed, the lower portion of the PCB board 100 is located inside the limiting step 2032 .

[0054] Furthermore, connection holes 2031 are provided at both ends of the support plate 203 , and fastening screws 204 are screwed into the connection holes 2031 to achieve detachable connection between the support plate 203 , the upper cover plate 201 and the bottom shell 202 .

[0055] In this embodiment, by setting a simple stopper structure on the PCB board 100, opening a corresponding stopper slot on the chassis structure 200, and adding three support plates 203 and two copper bars 104, it is both stable and easy to implement. The copper bar 104 can pass large currents to ensure the power supply of each business card board 300; the copper bar 104 is set at the narrowest part of the lower part of the PCB board 100, which can increase the strength of the PCB board and almost eliminate the possibility of deformation of the PCB board 100. Through the coordination of the stopper and the slot, the copper bar 104 and the support plate 203, the U-shaped PCB board 100 can be installed very stably and reliably inside the chassis structure without using any screws, and will not deform. It is simple to install, the assembly cost is low, the parts are simple, and the manufacturing cost is also low.

[0056] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An audio and video transmission device, characterized in that: The invention comprises a chassis structure (200) and a functional card board installed in the chassis structure (200), wherein the functional card board comprises a plurality of PCB boards (100), wherein an upper stopper (101) is provided at the top of the PCB board (100), wherein the upper stopper (101) is snap-fitted with a first card slot (205) in the chassis structure (200), wherein a left stopper (102) is provided at the side of the PCB board (100), wherein the left stopper (102) is snap-fitted with a second card slot (206) in the chassis structure (200), and wherein a plurality of lower stoppers (103) are provided at the bottom of the PCB board (100), wherein the lower stoppers (103) are snap-fitted with a third card slot (207) in the chassis structure (200), so as to realize snap-fitting and fixing of the PCB board (100) to the chassis structure (200).

2. The audio and video transmission device according to claim 1, characterized in that: A copper bar (104) and a power input port (105) are provided at the lower part of the back side of the PCB board (100); the copper bar (104) is arranged along the length direction of the PCB board (100); and the power input port (105) is located on one side of the copper bar (104).

3. The audio and video transmission device according to claim 2, characterized in that: A plurality of business card mother sockets (106) are provided at the lower front portion of the PCB board (100) for connecting the business card board (300).

4. The audio and video transmission device according to claim 3, characterized in that: A main control board socket (107) is provided on the front side of the PCB board (100) for connecting a main control card.

5. The audio and video transmission device according to claim 4, characterized in that: A power module is arranged on the left side of the lower part of the PCB board (100), and the power lines gradually decrease from left to right to respectively supply power to the main control card and the plurality of service card boards (300). A network signal line is arranged on the right side of the lower part of the PCB board (100), and the network signal lines gradually increase from left to right and converge to the main control board socket (107) to be connected to the main control card.

6. The audio and video transmission device according to any one of claims 1 to 5, characterized in that: The chassis structure (200) comprises an upper cover plate (201) and a bottom shell (202), and the PCB board (100) is buckled and fixed between the end of the upper cover plate (201) and the end of the bottom shell (202).

7. The audio and video transmission device according to claim 6, characterized in that: The end of the upper cover plate (201) is provided with a first card slot (205), and the end of the bottom shell (202) is respectively provided with a second card slot (206) and a plurality of third card slots (207).

8. The audio and video transmission device according to claim 7, characterized in that: The chassis structure (200) is further provided with a plurality of support plates (203), the two ends of the support plates (203) being respectively connected and fixed to the upper cover plate (201) and the bottom shell (202), and the support plates (203) are located on the front of the PCB board (100) to support and limit the PCB board (100).

9. The audio and video transmission device according to claim 8, characterized in that: The lower part of the support plate (203) is provided with a limiting step (2032), the height of the limiting step (2032) matches the height of the lower part of the PCB board (100), and when the PCB board (100) is installed and fixed, the lower part of the PCB board (100) is located inside the limiting step (2032).

10. The audio and video transmission device according to claim 8, characterized in that: Both ends of the support plate (203) are provided with connection holes (2031) to achieve detachable connection between the support plate (203) and the upper cover plate (201) and the bottom shell (202).

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