A cableless chassis

Abstract

The application discloses a cable-free machine case, which comprises a case body, a front panel and a rear panel connected to the case body, an external connector and a power filter arranged on the front panel, a back plate, a first printed board and a second printed board arranged in the case body, a rear end of the external connector connected to the first printed board, and an inter-board connector arranged between the first printed board and the second printed board, between the second printed board and the back plate, and between a rear end of the power filter and the back plate; the machine case further comprises a mounting bracket, a guide structure arranged between a rear end of the case body and the mounting bracket, and connecting ears arranged on left and right sides of the case body. The application changes the connection mode of the external connector and the power filter to the back plate in the machine case from cable interconnection to inter-board connector interconnection, realizes the cable-free purpose of the machine case, makes the machine case structure more compact and reduces the weight, and designs the case body and the mounting bracket as two products, so that the quick assembly and the later maintenance of the machine case in a narrow space are realized through the mounting bracket.

Description

Technical Field

[0001] This invention belongs to the field of equipment chassis technology, and specifically relates to a cableless chassis. Background Technology

[0002] Cabled connection is a common connection method in the current chassis industry. Chassis using cabled connection usually includes a chassis, which is connected to a front panel and a rear panel. The front panel is equipped with external connectors and power filters. The chassis has a back panel inside. Several functional modules are inserted into the chassis along the front-to-back direction and are electrically connected to the back panel through connectors. The external connectors and power filters are electrically connected to the back panel through cables, thereby realizing the transmission of electrical signals. The problems with this cabled connection method are: (1) In order to avoid the transmission performance being affected by the small turning radius or the cable tail being stuck and unable to be disassembled, the bending radius required for the adapter cable needs to be reserved inside the chassis located between the front panel and the back panel, which increases the external size of the chassis and contradicts the requirement for miniaturization and lightweighting of the chassis size as the integration level continues to improve; (2) In order to cope with the complex working environment, the cable has to use more cable sheaths to protect the cable from interference, which not only seriously increases the volume and weight of the chassis and makes it inconvenient for system maintenance, but also cannot avoid problems such as transmission loss, signal interference, and signal integrity. In most cases, the space at the chassis installation location is small, which brings severe challenges to the installation of the chassis and subsequent maintenance. Summary of the Invention

[0003] To address the technical problems associated with cabled chassis, the present invention aims to propose a cableless chassis that uses inter-board connectors to achieve electrical connections between external connectors, power filters, and the backplane, thereby reducing the size and weight of the chassis. Furthermore, the use of mounting brackets enables rapid assembly and subsequent maintenance of the chassis within a confined space.

[0004] The objective of this invention is achieved through the following technical solution: a cableless chassis, comprising a chassis 1, a front panel 2 and a rear panel 3 connected to the chassis, an external connector 6 and a power filter 7 provided on the front panel, a back panel 4 provided inside the chassis, and a first printed circuit board 8 and a second printed circuit board 9 also provided inside the chassis, the rear end of the external connector 6 being connected to the first printed circuit board, and inter-board connectors 10 being provided between the first printed circuit board and the second printed circuit board, between the second printed circuit board and the back panel, and between the rear end of the power filter and the back panel; the chassis also includes a mounting bracket 11, a guide structure being provided between the rear end of the chassis and the mounting bracket, and connecting ears 12 being provided on the left and right sides of the chassis respectively.

[0005] By employing the aforementioned technical solution, the present invention has the following beneficial effects:

[0006] (1) The connection method of the external connectors and power filters inside the chassis to the back panel is changed from cable interconnection to board-to-board connector interconnection, so as to achieve the purpose of cableless connection inside the chassis. Compared with the existing cable connection method, this cableless method occupies less space and is lighter, making the chassis structure more compact and lighter, which is convenient for installation and later maintenance, and is more in line with the requirements of the continuous improvement of integration for miniaturization and lightweight chassis size.

[0007] (2) The enclosure and the mounting bracket are designed as two products. When assembling the enclosure, the mounting bracket is first assembled to the corresponding support position on the machine. Then, the enclosure is quickly installed in place through the guide structure between the rear end of the enclosure and the mounting bracket. Finally, the installed enclosure is fixed with the connecting ears. This solves the problems of difficult installation and high maintenance costs caused by the small installation space on the machine. It ensures that the enclosure has good maintainability. At the same time, compared with traditional brackets, the mounting bracket has the characteristics of being lightweight and easy to install.

[0008] Further, the back panel 4, the first printed circuit board 8, and the second printed circuit board 9 are in a parallel state, saving the space occupied by the two printed circuit boards.

[0009] Further specifying, the backplate 4 is disposed on the backplate reinforcing frame 13, and the outer edge of the backplate reinforcing frame is connected to the backplate mounting surface inside the housing. This invention first fixes the backplate to the backplate reinforcing frame, and then connects the backplate reinforcing frame to the backplate mounting surface inside the housing, converting the thickness tolerance of the backplate into the thickness tolerance of the backplate reinforcing frame. Considering that the backplate reinforcing frame is a machined structure, its thickness tolerance is easy to control and can meet the requirements of the blind mating distance tolerance for connectors between parallel boards.

[0010] Further defined, a number of mounting blocks 131 are symmetrically arranged on the left and right inner walls of the enclosure, distributed in the vertical direction, and strip-shaped mounting blocks 131 extending in the horizontal direction are arranged on the top and bottom inner walls of the enclosure. The front wall surface of the mounting blocks serves as the back plate mounting surface, and the first fastener presses the outer edge of the back plate reinforcing frame onto the aforementioned back plate mounting surface.

[0011] Further specified, the first fastener is a first screw, the mounting block is provided with a first screw hole 1311 extending in the front-rear direction, the outer edge of the back plate reinforcing frame is provided with a plurality of mounting protrusions 132 extending rearward and the mounting protrusions are provided with first through holes 1321 corresponding to the first screw holes, the outer edge of the back plate is provided with a plurality of through holes 401 corresponding to the mounting protrusions, the mounting protrusions pass through the corresponding through holes and abut against the front wall surface of the mounting block, the first screw passes through the first through hole and is screwed into the corresponding first screw hole, and the head of the first screw presses the outer edge of the back plate reinforcing frame onto the aforementioned back plate mounting surface.

[0012] Further specifying, the rear wall surface of the front panel 2 is provided with a plurality of short mounting posts 2011 and a plurality of long mounting posts 2021 extending rearward. The second fastener 2012 presses the first printed circuit board 6 against the rear end face of the short mounting posts, and the third fastener 2022 presses the second printed circuit board 9 against the rear end face of the long mounting posts. In this invention, the rear end face of the short mounting posts and the rear end face of the long mounting posts are respectively used as the mounting surface of the first printed circuit board and the mounting surface of the second printed circuit board. Based on the aforementioned two rear end faces, when the first printed circuit board and the second printed circuit board are mated, only the thickness tolerance of the inner printed circuit board is introduced into the mating distance tolerance of the two printed circuit boards, eliminating the thickness tolerance of the outer printed circuit board, thereby meeting the blind mating distance tolerance requirements of the connector between parallel boards.

[0013] Further specified, the second fastener 2012 is a second screw, which passes through the first printed circuit board and is screwed into the rear end of the short mounting post. The head of the second screw presses the first printed circuit board against the rear end face of the short mounting post. The third fastener 2022 is a third screw, which passes through the first printed circuit board and is screwed into the rear end of the long mounting post. The head of the third screw presses the second printed circuit board against the rear end face of the long mounting post.

[0014] Further defined, the outer edge of the first printed circuit board is connected to the rear end face of the long mounting post, the outer edge of the second printed circuit board is connected to the rear end face of the short mounting post, and the aforementioned short mounting posts 2011 are distributed within the area enclosed by a plurality of long mounting posts 2021. This layout helps to reduce the space occupied by the mounting posts.

[0015] Further specified, anti-misfit mating structures are provided between the first and second printed circuit boards, and between the second printed circuit board and the backplane. The anti-misfit mating structures include a first guide pin 141 and a first guide sleeve 142. The first guide pin has a first pair of insertion portions 1410 extending in the front-rear direction, and the first pair of insertion portions has a first flattening 14101. The first guide sleeve has a receiving hole 1420 extending in the front-rear direction and adapted to the aforementioned first pair of insertion portions. When the two printed circuit boards or the printed circuit board and the backplane are mated, the first pair of insertion portions first enter the receiving hole. The first flattening 1420 restricts the angular orientation in the circumferential direction to achieve the anti-misfit mating function. Simultaneously, the guiding effect of the first pair of insertion portions and the receiving hole ensures accurate mating of the inter-board connectors.

[0016] Furthermore, the first guide sleeve has an identification cut 14201 on its mating end. The identification cut and the first cut are in a corresponding state in the front-back direction, which facilitates the quick alignment of the first guide pin and the first guide sleeve when they are assembled on the corresponding printed circuit board.

[0017] Further specified, the non-mating end of the first mating part 1410 is provided with a first limiting platform 1411, and the non-mating end of the receiving hole 1420 is provided with a second limiting platform 1421. The outer wall of the first limiting platform is provided with a plurality of second flattened sections 14111, and the outer wall of the second limiting platform is provided with a plurality of third flattened sections 14211. The housing of the board connector is provided with limiting holes 1006 that are adapted to the aforementioned first or second limiting platforms. During assembly, the first limiting platform and the second limiting platform are placed in the corresponding limiting holes. By rotating the first limiting platform and the second limiting platform, the plurality of first flattened sections in the plurality of anti-misfit mating structures between the two printed circuit boards are positioned at different angles in the circumferential direction, thereby further improving the anti-misfit mating performance.

[0018] Further defined, a first connecting post 1412 extending in the front-back direction is provided on the wall surface of the first limiting platform away from the first pair of insertion parts, and a second connecting post 1422 extending in the front-back direction is provided on the wall surface of the second limiting platform away from the receiving hole. The first connecting post passes through the first printed circuit board or the second printed circuit board or the back plate and is screwed with a first nut 1413. The second connecting post passes through the first printed circuit board or the second printed circuit board or the back plate and is screwed with a second nut 1423.

[0019] Further defining the mounting bracket, it includes a housing mounting arm 111 extending in the left-right direction. A guide structure is provided between the front wall of the housing mounting arm and the rear end of the housing. The guide structure includes a second guide pin 1121 extending in the front-back direction and a second guide sleeve 1122 adapted to the second guide pin. One of the second guide pin and the second guide sleeve is located on the front wall of the housing mounting arm, and the other is located on the rear end of the housing. A first mounting hole 1201 extending in the up-down direction is provided on the connecting lug 12. When installing the chassis, the second guide pin is inserted into the second guide sleeve to guide the chassis into place and limit the chassis in the up-down and left-right directions. Screws are passed through the first mounting hole and connected to the corresponding support position on the machine to fix the installed chassis.

[0020] Further specifying, second guide pins 1121 extending in the front-rear direction are symmetrically arranged on the left and right sides of the front wall of the housing mounting arm, and second guide sleeves 1122 are symmetrically arranged on the left and right sides of the rear end of the housing.

[0021] Further, a third limiting platform 11211 is provided on the second guide pin, and the rear end of the second guide pin passes through the housing mounting arm and is then screwed on with a third nut 11212 for fixation.

[0022] Further, guide sleeve seats 115 are protruding on the left and right sides of the rear end of the box, and a second guide sleeve 1122 is installed on the rear side of each guide sleeve seat to avoid damaging the box structure.

[0023] Further defining the mounting arm, the rear wall of the mounting arm extends rearward to form a mounting ear 113, and a second mounting hole 1131 extending in the vertical direction is provided on the mounting ear.

[0024] Further defining the enclosure, the enclosure includes a top plate 101, a bottom plate 102, a left side plate 103, and a right side plate 104 that are spliced ​​together as one piece. The front and rear walls of the top plate, left side plate, bottom plate, and right side plate are respectively provided with third screw holes 1061 extending in the front-rear direction. The outer edges of the front and rear panels are provided with second through holes 1062 that correspond to the second screw holes. The fourth screw 1063 passes through the second through hole and is screwed into the corresponding second screw hole to detachably connect the front and rear panels to the enclosure. Connecting ears 12 are symmetrically provided on the front end of the outer wall of the left side plate and the front end of the outer wall of the right side plate.

[0025] Further, weight-reducing heat dissipation grooves 108 are provided on the outer walls of the top plate, left side plate, bottom plate and right side plate.

[0026] Furthermore, the board-to-board connector 10 adopts a rectangular connector. Compared with a circular connector, a rectangular connector only needs to increase the size in the left-right or up-down direction, which is convenient for layout in the same space and facilitates the miniaturization of the chassis.

[0027] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0028] Figure 1 This is an exploded view of the first embodiment of a cableless chassis according to the present invention.

[0029] Figure 2 yes Figure 1 Enlarged view of point I in the middle.

[0030] Figure 3 This is a schematic diagram showing the connection relationship between the first printed circuit board, the second printed circuit board, and the back plate in the first embodiment.

[0031] Figure 4 This is an exploded view of the back plate and the back plate reinforcing frame in the first embodiment.

[0032] Figure 5 This is a schematic diagram showing the first guide pin and the first guide sleeve in a separated state in the first embodiment.

[0033] Figure 6 This is an assembly diagram of the housing and mounting bracket in the first embodiment.

[0034] Among them, 1-box body, 101-top plate, 102-bottom plate, 103-left side plate, 104-right side plate, 105-second screw hole, 1061-third screw hole, 1062-second through hole, 1063-fourth screw, 1071-guide rail, 1072-slot, 108-weight-reducing heat dissipation groove, 2-front panel, 2011-short mounting post, 2012-second fastener, 2021-long mounting post, 2022-third fastener, 2 03-Handle, 3-Rear Panel, 4-Back Panel, 5-Functional Module, 6-External Connector, 7-Power Filter, 8-First Printed Circuit Board, 801-Breakthrough Hole, 9-Second Printed Circuit Board, 10-Inter-Board Connector, 1001-First Rectangular Connector, 1002-Second Rectangular Connector, 1003-Third Rectangular Connector, 1004-Fourth Rectangular Connector, 1005-Fifth Rectangular Connector, 11-Mounting Bracket, 111-Enclosure Mount Arm, 1121-Second guide pin, 1122-Second guide sleeve, 11211-Third limiting platform, 11212-Third nut, 113-Mounting ear, 1131-Second mounting hole, 1141-Firming plate, 1142-Bridging plate, 115-Guide sleeve seat, 12-Connecting ear, 1201-First mounting hole, 13-Back plate reinforcing frame, 131-Mounting block, 1311-First screw hole, 132-Mounting protrusion, 1321-First through hole 133 - Avoidance area, 141 - First guide pin, 1410 - First insertion part, 14101 - First flattened part, 1411 - First limiting platform, 14111 - Second flattened part, 1412 - First connecting post, 1413 - First nut, 142 - First guide sleeve, 1420 - Receiving hole, 14201 - Identification flattened part, 1421 - Second limiting platform, 14211 - Third flattened part, 1422 - Second connecting post, 1423 - Second nut. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first or I," "second or II," "third or III," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first or I," "second or II," or "third or III" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "setting," etc., 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 according to the specific circumstances.

[0039] Please see Figure 1 This is a first embodiment of a cableless chassis according to the present invention. This embodiment includes a chassis 1, with a front panel 2 and a rear panel 3 connected to it. The front panel has an external connector 6 and a power filter 7. The chassis has a back panel 4 inside. Several functional modules 5 are inserted into the chassis along the front-to-back direction and electrically connected to the back panel 4 via connectors. Specifically, each functional module has a first connector at its front end and a first adapter connector at the rear of the back panel. After the functional modules are inserted, the first connector and the first adapter connector are plugged in to transmit electrical signals. In this embodiment, four functional modules are inserted into the chassis; however, the number of functional modules can be adjusted according to operational requirements.

[0040] Based on the aforementioned structure, this embodiment further includes a first printed circuit board 8 and a second printed circuit board 9 disposed inside the chassis. The rear end of the external connector 6 is connected to the first printed circuit board. Inter-board connectors 10 are disposed between the first and second printed circuit boards, between the second printed circuit board and the backplane 4, and between the rear end of the power filter and the backplane. With the aforementioned design, this embodiment changes the connection method between the external connectors and the power filter to the backplane inside the chassis from cable interconnection to inter-board connector interconnection, achieving the goal of cableless connection inside the chassis. Compared with the existing cable connection method, this cableless method occupies less space and is lighter, making the chassis structure more compact and lighter, facilitating installation and subsequent maintenance, and better meeting the requirements of continuous improvement in integration for miniaturization and lightweight chassis.

[0041] Please see Figure 6This embodiment also includes a mounting bracket 11, a guide structure between the rear end of the enclosure and the mounting bracket, and connecting ears 12 on the left and right sides of the enclosure. This embodiment designs the enclosure and the mounting bracket as two separate products. During enclosure assembly, the mounting bracket is first assembled to the corresponding support position on the machine. Then, the enclosure is quickly installed in place using the guide structure between the rear end of the enclosure and the mounting bracket. Finally, the connected ears are used to secure the installed enclosure. This solves the problems of difficult installation and high maintenance costs caused by limited installation space on the machine, ensuring good maintainability of the enclosure. Furthermore, compared to traditional brackets, the mounting bracket is lightweight and easy to install.

[0042] In this embodiment, the rear end of the contact element that makes up the external connector 6 is connected to the first printed circuit board by welding or crimping.

[0043] In this embodiment, please refer to Figure 3 The backplate 4, the first printed circuit board 8, and the second printed circuit board 9 are parallel, saving the space occupied by the two printed circuit boards. To achieve blind mating interconnection of the parallel board connectors between the three printed circuit boards, it is necessary to control the assembly tolerance between the two printed circuit boards to be less than the blind mating distance tolerance of the parallel board connectors. Through dimensional chain calculation, when the thickness tolerance of the two printed circuit boards is included in the assembly tolerance between the two printed circuit boards, the requirement for the maximum mating distance tolerance of the parallel board connectors is not met.

[0044] Please see Figure 1 This embodiment also includes a backplate reinforcing frame 13, with the backplate 4 disposed on the backplate reinforcing frame 13. The outer edge of the backplate reinforcing frame is connected to the backplate mounting surface inside the chassis. Existing chassis typically connect the backplate directly to the backplate mounting surface inside the chassis. When the backplate and the second printed circuit board are blind-molecularly interconnected, the blind-molecular fit tolerance will introduce the thickness tolerance between the backplate and the second printed circuit board, thus failing to meet the blind-molecular distance tolerance requirements for connectors between parallel boards. To meet this requirement, in this embodiment, during backplate assembly, the backplate is first fixed to the backplate reinforcing frame, and then the backplate reinforcing frame is connected to the backplate mounting surface inside the chassis, ensuring that the backplate does not contact the backplate mounting surface inside the chassis. At this point, the thickness tolerance of the backplate is converted into the thickness tolerance of the backplate reinforcing frame. Considering that the backplate reinforcing frame is a machined structure, its thickness tolerance is easy to control, thus meeting the blind-molecular distance tolerance requirements for connectors between parallel boards.

[0045] Furthermore, mounting blocks 131 are respectively provided on the left, right, top, and bottom inner walls of the enclosure. The front wall surface of the mounting block serves as the backplate mounting surface. During assembly, the outer edge of the backplate reinforcing frame is placed against the front wall surface of the mounting block, and then the first fastener is installed to achieve the installation and fixation of the backplate inside the enclosure. Specifically, several mounting blocks 131 are symmetrically arranged along the vertical direction on the left and right inner walls of the enclosure, and strip-shaped mounting blocks 131 extending along the horizontal direction are provided on the top and bottom inner walls of the enclosure. The front wall surfaces of the several mounting blocks and the front wall surfaces of the strip-shaped mounting blocks are located on the same vertical plane perpendicular to the front-back direction. First screw holes 1311 extending along the front-back direction are provided on both the several mounting blocks and the strip-shaped mounting blocks. Please refer to [further details omitted]. Figure 4 The outer edge of the backplate reinforcing frame is provided with several rearwardly extending mounting protrusions 132, and each mounting protrusion is provided with a first through hole 1321 extending in the front-rear direction. The outer edge of the backplate is provided with several through holes 401 corresponding to the mounting protrusions. During assembly, the mounting protrusions pass through the corresponding through holes to fix the backplate to the backplate reinforcing frame. Then, the rear wall surface of the mounting protrusion abuts against the front wall surface of the mounting block. Several first screws pass through the corresponding first through holes and are screwed into the corresponding first screw holes until the heads of the first screws press against the front wall surface of the backplate reinforcing frame, thus realizing the installation and fixation of the backplate inside the chassis. Furthermore, the shape of the backplate reinforcing frame is adapted to the shape of the backplate, which is conducive to improving assembly efficiency. For example, in this embodiment, the shape of both the backplate and the backplate reinforcing frame is a rectangular plate with a rectangular area removed from the upper left corner. In addition, the backplate reinforcing frame is provided with a clearance area 133 for the inter-board connector on the front wall surface of the backplate to pass through.

[0046] In this embodiment, a plurality of short mounting posts 2011 and a plurality of long mounting posts 2021 extending rearward are provided on the rear wall surface of the front panel 2 of the housing. The aforementioned "short" and "long" are defined by the relative length of the two mounting posts. The rear end face of the short mounting post serves as the mounting surface of the first printed circuit board 8, and the rear end face of the long mounting post serves as the mounting surface of the second printed circuit board 9. Specifically, during assembly, the first printed circuit board is abutted against the rear end face of the short mounting post, and then the second fastener 2012, such as the second screw, is passed through the first printed circuit board and screwed into the rear end of the short mounting post until the head of the second screw presses against the rear wall surface of the first printed circuit board. Similarly, the second printed circuit board is abutted against the rear end face of the long mounting post, and then the third fastener 2022, such as the third screw, is passed through the second printed circuit board and screwed into the rear end of the long mounting post until the head of the third screw presses against the rear wall surface of the second printed circuit board. To prevent the heads of the second / third screw from damaging the printed circuit board, a shim can be added between the head of the second / third screw and the printed circuit board. In this embodiment, the mounting surfaces of the first printed circuit board and the second printed circuit board are the rear end face of the short mounting post and the rear end face of the long mounting post, respectively. Using these two rear end faces as a reference, when the first and second printed circuit boards are mated, only the thickness tolerance of the inner printed circuit board is included in the mating distance tolerance of the two printed circuit boards, eliminating the thickness tolerance of the outer printed circuit board, thereby meeting the blind mating distance tolerance requirements of the parallel board connector. Furthermore, the outer edge of the first printed circuit board is connected to the long mounting post, and the outer edge of the second printed circuit board is connected to the short mounting post. The aforementioned short mounting posts 2011 are distributed within the area enclosed by several long mounting posts 2021. This layout helps reduce the space occupied by the mounting posts. Considering the installation strength of the larger second printed circuit board, long mounting posts are added within the area enclosed by several short mounting posts. The first printed circuit board has a clearance through-hole 801 for the long mounting post to pass through. In addition, a handle 203 is provided on the front wall of the front panel for easy disassembly and assembly of the front panel.

[0047] In this embodiment, please refer to Figure 3 The board-to-board connector 10 adopts a rectangular connector. The first rectangular connector 1001 is set on both sides of the second printed circuit board. The second rectangular connector 1002 adapted to the corresponding first rectangular connector is set on the rear side of the first printed circuit board. The third rectangular connector 1003 adapted to the corresponding first rectangular connector is set on the front side of the back panel. The fourth rectangular connector 1004 is set on the rear side of the power filter. The fifth rectangular connector 1005 adapted to the fourth rectangular connector is set on the front side of the back panel. Considering the limited installation space inside the chassis, if a circular connector is used as the board-to-board connector, when high-density signal transmission is performed, the circular connector needs to increase its size in both the left-right and up-down directions, which occupies a lot of space and increases the size of the chassis. The rectangular connector only needs to increase its size in the left-right or up-down directions, which is convenient for layout in the same space and is conducive to the miniaturization of the chassis.

[0048] In this embodiment, please refer to Figure 3 and Figure 5 Anti-misfitting structures are provided between the first printed circuit board 8 and the second printed circuit board 9, and between the second printed circuit board 9 and the back plate 4. The anti-misfitting structure includes a first guide pin 141 and a first guide sleeve 142 that are adapted to each other. The first guide pin has a first pair of insertion parts 1410 extending in the front-back direction. The first pair of insertion parts is provided with a first flattening 14101. The first guide sleeve has a receiving hole 1420 extending in the front-back direction and adapted to the aforementioned first pair of insertion parts (mainly adapted to the cross-sectional shape). Taking the second printed circuit board and the back plate as an example: one of the first guide pin and the second guide sleeve is set on the second printed circuit board and the other is set on the back plate. When the second printed circuit board and the back plate are connected, the first pair of insertion parts first enter the receiving hole. The anti-misfitting function is achieved by the first flattening limiting the angle and orientation in the circumferential direction. At the same time, the precise insertion of the first rectangular connector and the third rectangular connector is ensured by the guiding effect of the first pair of insertion parts and the receiving hole. Furthermore, the mating end of the first guide sleeve is provided with an identification flattening 14201, which corresponds to the first flattening in the front-back direction, facilitating quick alignment of the first guide pin and the first guide sleeve when assembled on the corresponding printed circuit board. Even further, the non-mating end of the first mating portion 1410 is provided with a first limiting platform 1411, and the non-mating end of the receiving hole 1420 is provided with a second limiting platform 1421. At least one second flattening 14111 (six second flattenings in this embodiment) extending in the front-back direction is provided on the outer wall of the first limiting platform, and at least one third flattening 14211 (six second flattenings in this embodiment) extending in the front-back direction is provided on the outer wall of the second limiting platform. The housing of the rectangular connector is provided with limiting holes 1006 that are adapted to the aforementioned first or second limiting platform (mainly adapted to the cross-sectional shape). Figure 2 As shown), during assembly, the first limiting platform and the second limiting platform are placed in the corresponding limiting holes. By rotating the first limiting platform and the second limiting platform, multiple first flattened sections in the several anti-misfit insertion structures between the two printed circuit boards are positioned at different angles in the circumferential direction, further improving the anti-misfit insertion performance. Furthermore, a first connecting post 1412 extending in the front-back direction is provided on the wall surface of the first limiting platform away from the first mating part, and a second connecting post 1422 extending in the front-back direction is provided on the wall surface of the second limiting platform away from the receiving hole. Taking the second printed circuit board and the back plate as an example: after the first connecting post passes through the limiting hole and the second printed circuit board, the first nut 1413 (i.e., the fourth fastener) is screwed on. The second printed circuit board is clamped between the first nut and the first limiting platform, realizing the installation and fixation of the first guide pin on the second printed circuit board; similarly, after the second connecting post passes through the limiting hole and the back plate, the second nut 1423 (i.e., the fifth fastener) is screwed on. The back plate is clamped between the second nut and the second limiting platform, realizing the installation and fixation of the first guide sleeve on the back plate.

[0049] In this embodiment, please refer to Figure 1 and Figure 6 The mounting bracket includes a housing mounting arm 111 extending in the left-right direction. A guide structure is provided between the front wall of the housing mounting arm and the rear end of the housing. Specifically, second guide pins 1121 extending in the front-rear direction are symmetrically arranged on the left and right sides of the front wall of the housing mounting arm, and second guide sleeves 1122 are symmetrically arranged on the left and right sides of the rear end of the housing. When installing the housing, the second guide pins are inserted into the second guide sleeves to guide the housing into place and limit the housing in the vertical and horizontal directions. First mounting holes 1201 extending in the vertical direction are provided on the connecting ears 12 on the left and right sides of the housing. Screws are passed through the first mounting holes and connected to the corresponding support positions on the machine to fix the housing in place. In this embodiment, a third limiting platform 11211 is provided on the second guide pin. The rear end of the second guide pin passes through the housing mounting arm and is screwed with a third nut 11212 (i.e., the sixth fastener) for fixation.

[0050] Furthermore, the rear wall of the housing mounting arm extends rearward to form a mounting ear 113. A second mounting hole 1131 extending vertically is provided on the mounting ear. A screw passes through the second mounting hole to fix the mounting bracket to the corresponding support position on the machine. In this embodiment, a mounting ear 113 extends rearward on the left and right sides of the rear wall of the housing mounting arm, which helps to improve the strength of the mounting bracket. Even further, both the connecting ear and the mounting ear include two relatively distributed stiffening plates 1141 and a bridging plate 1142 connecting the bottoms of the two stiffening plates. A first or second mounting hole extending vertically is provided through the bridging plate, which helps to improve the connection strength. In addition, guide sleeve seats 115 protrude from the left and right rear ends of the housing. A second guide sleeve 1122 is installed on the rear side of each guide sleeve seat to avoid damaging the housing structure.

[0051] In this embodiment, please refer to Figure 1The enclosure includes a top plate 101, a bottom plate 102, a left side plate 103, and a right side plate 104. The top plate, left side plate, bottom plate, and right side plate are joined together by screws and second screw holes 105 located at the junction area. Third screw holes 1061 extending in the front-rear direction are respectively provided on the front and rear walls of the top plate, left side plate, bottom plate, and right side plate. Second through holes 1062, corresponding to the second screw holes, are provided on the outer edges of the front and rear panels. Fourth screws 1063 pass through the second through holes and are screwed into the corresponding second screw holes to detachably connect the front and rear panels to the enclosure. Several guide rails 1071 extending in the front-rear direction are symmetrically arranged on the inner walls of the top and bottom plates. A slot 1072 for inserting functional modules is formed between two adjacent guide rails. Strip-shaped mounting blocks 131 are symmetrically arranged on the inner walls of the top and bottom plates, and the front ends of the guide rails are connected to the strip-shaped mounting blocks. Several mounting blocks 131 are symmetrically arranged on the inner walls of the left and right side plates. Connecting ears 12 are symmetrically arranged at the front ends of the outer walls of the left and right side plates, and guide sleeve seats 115 are symmetrically arranged at the rear ends of their outer walls. Furthermore, weight-reducing heat dissipation grooves 108 are provided on the outer walls of the top plate, left side plate, bottom plate, and right side plate.

[0052] Example 2

[0053] The difference between this embodiment and embodiment one is that, provided the connection strength is sufficient, strip-shaped mounting blocks are provided on the inner walls of the top and bottom sides of the housing, and the front wall surface of the mounting blocks serves as the mounting surface of the back panel.

[0054] Example 3

[0055] The difference between this embodiment and Embodiment 1 is that: a third mounting hole extending in the front-rear direction is provided on the mounting block, and the rear end of the first fastener passes through the first through hole on the outer edge of the back plate reinforcing frame and is forcibly installed into the third mounting hole until the first boss at the front end of the first fastener presses against the outer edge of the back plate reinforcing frame.

[0056] Example 4

[0057] The difference between this embodiment and Embodiment 1 is that: during assembly, the first printed circuit board is abutted against the rear end face of the short mounting post, and then the second fastener is passed through the first printed circuit board and forcibly inserted into the fourth mounting hole at the rear end of the short mounting post until the second boss at the rear end of the second fastener presses against the rear wall surface of the first printed circuit board; similarly, during assembly, the second printed circuit board is abutted against the rear end face of the long mounting post, and then the third fastener is passed through the second printed circuit board and forcibly inserted into the fifth mounting hole at the rear end of the long mounting post until the third boss at the rear end of the third fastener presses against the rear wall surface of the second printed circuit board.

[0058] Example 5

[0059] The difference between this embodiment and Embodiment 1 is that the first and second connecting posts are omitted. In this case, after the first limiting platform is placed on the corresponding limiting hole on the housing of the rectangular connector, one end of the fourth fastener passes through the second printed circuit board and is screwed or forcibly installed into the sixth mounting hole on the first limiting platform until the fourth boss at the other end of the fourth fastener presses against the second printed circuit board. Similarly, after the second limiting platform is placed on the corresponding limiting hole on the housing of the rectangular connector, one end of the fifth fastener passes through the back plate and is screwed or forcibly installed into the seventh mounting hole on the second limiting platform until the fifth boss at the other end of the fifth fastener presses against the back plate.

[0060] Example 6

[0061] The difference between this embodiment and Embodiment 1 is that the box body is a one-piece structure.

[0062] The above description is merely a preferred embodiment of the present invention. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments without departing from the scope of the present invention and based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A cableless chassis, comprising a chassis (1), a front panel (2) and a rear panel (3) connected to the chassis, the front panel having an external connector (6) and a power filter (7), and a back panel (4) inside the chassis, characterized in that, The enclosure also includes a first printed circuit board (8) and a second printed circuit board (9). The rear end of the external connector (6) is connected to the first printed circuit board. Inter-board connectors (10) are provided between the first printed circuit board and the second printed circuit board, between the second printed circuit board and the back plate, and between the rear end of the power filter and the back plate. The enclosure also includes a mounting bracket (11). A guide structure is provided between the rear end of the enclosure and the mounting bracket. Connecting ears (12) are provided on the left and right sides of the enclosure.

2. The cableless chassis according to claim 1, characterized in that, The backplate (4), the first printed circuit board (8), and the second printed circuit board (9) are in a parallel state.

3. The cableless chassis according to claim 1, characterized in that, The back plate (4) is set on the back plate reinforcing frame (13), and the outer edge of the back plate reinforcing frame is connected to the back plate mounting surface inside the box.

4. A cableless chassis according to claim 3, characterized in that, Several mounting blocks (131) are symmetrically arranged on the left and right inner walls of the enclosure, distributed in the vertical direction. Strip-shaped mounting blocks (131) extending in the horizontal direction are arranged on the top and bottom inner walls of the enclosure. The front wall surface of the mounting block serves as the back plate mounting surface. The first fastener presses the outer edge of the back plate reinforcing frame onto the aforementioned back plate mounting surface.

5. A cableless chassis according to claim 4, characterized in that, The first fastener is a first screw. The mounting block is provided with a first screw hole (1311) extending in the front-rear direction. The outer edge of the back plate reinforcing frame is provided with a plurality of mounting protrusions (132) extending backward, and the mounting protrusions are provided with first through holes (1321) corresponding to the first screw holes. The outer edge of the back plate is provided with a plurality of through holes (401) corresponding to the mounting protrusions. The mounting protrusions pass through the corresponding through holes and abut against the front wall surface of the mounting block. The first screw passes through the first through hole and is screwed into the corresponding first screw hole. The head of the first screw presses the outer edge of the back plate reinforcing frame onto the aforementioned back plate mounting surface.

6. A cableless chassis according to claim 1, characterized in that, A number of short mounting posts (2011) and a number of long mounting posts (2021) extending rearward are provided on the rear wall surface of the front panel (2). A second fastener (2012) presses the first printed circuit board (6) onto the rear end face of the short mounting posts, and a third fastener (2022) presses the second printed circuit board (9) onto the rear end face of the long mounting posts.

7. A cableless chassis according to claim 6, characterized in that, The second fastener (2012) is a second screw. The second screw passes through the first printed circuit board and is screwed into the rear end of the short mounting post. The head of the second screw presses the first printed circuit board against the rear end face of the short mounting post. The third fastener (2022) is a third screw. The third screw passes through the first printed circuit board and is screwed into the rear end of the long mounting post. The head of the third screw presses the second printed circuit board against the rear end face of the long mounting post.

8. A cableless chassis according to claim 6, characterized in that, The outer edge of the first printed circuit board is connected to the rear end face of the long mounting post, the outer edge of the second printed circuit board is connected to the rear end face of the short mounting post, and the aforementioned short mounting posts (2011) are distributed inside the area enclosed by a plurality of long mounting posts (2021).

9. A cableless chassis according to claim 1, characterized in that, Anti-misfitting structures are provided between the first printed circuit board and the second printed circuit board, and between the second printed circuit board and the back plate. The anti-misfitting structure includes a first guide pin (141) and a first guide sleeve (142). The first guide pin has a first pair of insertion portions (1410) extending in the front-back direction. The first pair of insertion portions is provided with a first flattening (14101). The first guide sleeve has a receiving hole (1420) extending in the front-back direction and adapted to the aforementioned first pair of insertion portions.

10. A cableless chassis according to claim 9, characterized in that, The first guide sleeve has an identification cutter (14201) on its insertion end, and the identification cutter corresponds to the first cutter in the front-back direction.

11. A cableless chassis according to claim 9, characterized in that, The non-interlocking end of the first mating part (1410) is provided with a first limiting platform (1411), and the non-interlocking end of the receiving hole (1420) is provided with a second limiting platform (1421). Multiple second flat cuts (14111) are provided on the outer wall of the first limiting platform, and multiple third flat cuts (14211) are provided on the outer wall of the second limiting platform. The housing of the board connector is provided with limiting holes that are adapted to the aforementioned first or second limiting platform.

12. A cableless chassis according to claim 11, characterized in that, A first connecting post (1412) extending in the front-rear direction is provided on the wall surface of the first limiting platform away from the first pair of insertion parts. A second connecting post (1422) extending in the front-rear direction is provided on the wall surface of the second limiting platform away from the receiving hole. The first connecting post passes through the first printed circuit board or the second printed circuit board or the back plate and is screwed with a first nut (1413). The second connecting post passes through the first printed circuit board or the second printed circuit board or the back plate and is screwed with a second nut (1423).

13. A cableless chassis according to claim 1, characterized in that, The mounting bracket includes a housing mounting arm (111) extending in the left-right direction, and a guiding structure including a second guide pin (1121) extending in the front-back direction and a second guide sleeve (1122) adapted to the second guide pin. One of the second guide pin and the second guide sleeve is disposed on the front wall of the housing mounting arm and the other is disposed on the rear end of the housing. A first mounting hole (1201) extending in the up-down direction is provided on the connecting ear (12).

14. A cableless chassis according to claim 13, characterized in that, The front wall of the mounting arm of the housing is symmetrically provided with second guide pins (1121) extending in the front-rear direction on the left and right sides, and the rear wall of the housing is symmetrically provided with second guide sleeves (1122) on the left and right sides.

15. A cableless chassis according to claim 14, characterized in that, The second guide pin is equipped with a third limiting platform (11211), and the rear end of the second guide pin passes through the housing mounting arm and is then screwed with a third nut (11212) for fixation.

16. A cableless chassis according to claim 14, characterized in that, Guide sleeve seats (115) are protruding on the left and right sides of the rear end of the housing, and a second guide sleeve (1122) is installed on the rear side of each guide sleeve seat.

17. A cableless chassis according to claim 13, characterized in that, The rear wall of the housing mounting arm extends rearward to form a mounting ear (113), and a second mounting hole (1131) extending in the vertical direction is provided on the mounting ear.

18. A cableless chassis according to claim 1, characterized in that, The enclosure includes a top plate (101), a bottom plate (102), a left side plate (103), and a right side plate (104) that are spliced ​​together. The front and rear walls of the top plate, left side plate, bottom plate, and right side plate are respectively provided with third screw holes (1061) extending in the front-rear direction. The outer edges of the front and rear panels are provided with second through holes (1062) corresponding to the second screw holes. The fourth screw (1063) passes through the second through hole and is screwed into the corresponding second screw hole to detachably connect the front and rear panels to the enclosure. Connecting ears (12) are symmetrically provided on the front end of the outer wall of the left side plate and the front end of the outer wall of the right side plate.

19. A cableless chassis according to claim 18, characterized in that, Weight-reducing heat dissipation grooves (108) are provided on the outer walls of the top plate, left side plate, bottom plate and right side plate.

20. A cableless chassis according to any one of claims 1-19, characterized in that, The board connector 10 uses a rectangular connector.

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