IO signal distribution box structure with fixed mounting legs

Abstract

The utility model discloses a kind of IO signal distribution box structure with fixed installation leg, it is related to distribution box technical field, including distribution box main part and a pair of fixed support leg, a pair of fixed support leg is respectively arranged in the both sides of distribution box main part bottom, and respectively with distribution box main part bottom detachably connected;Distribution box main part includes lower box body, upper cover body and distribution assembly;A pair of fixed support leg top portion is equipped with clamping groove respectively, lower box body lower end two sides are clamped in the clamping groove of a pair of fixed support leg top portion respectively, and respectively with a pair of fixed support leg detachably connected, a pair of fixed support leg bottom portion is fixedly equipped with clamping structure respectively, solved the current IO signal distribution box installation scene limited, only adaptation plane carrier, cannot be compatible with external installation track, and disassembly maintenance is inconvenient, need to operate multiple fixed parts one by one, time-consuming and reinstallation positional deviation problem.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, specifically to an IO signal junction box structure with fixed mounting legs. Background Technology

[0002] In industrial automation and intelligent manufacturing systems, I / O signal junction boxes are core connection components for sensor data acquisition and equipment command transmission. Their installation adaptability directly affects the efficiency of production line layout and the ease of subsequent operation and maintenance. Currently, mainstream I / O signal junction boxes on the market generally adopt traditional fixing methods, including plate mounting, wall mounting, and recessed mounting: Plate mounting requires bolts to directly lock the junction box to the mounting plate or equipment surface; wall mounting and recessed mounting rely on connectors to fix the junction box to the wall or cabinet in a pre-reserved slot. The overall installation method is highly dependent on the planar structure of the fixing carrier.

[0003] Traditional installation methods have two major technical problems: First, the installation scenarios are limited. Traditional junction box structures can only be adapted to flat surfaces and cannot be compatible with external mounting rails. However, in scenarios such as control cabinets and production line equipment clusters, rail-mounted installation is the core method for achieving standardized layout and saving space. Therefore, traditional junction boxes cannot meet the installation requirements of such scenarios. Second, disassembly and maintenance are inconvenient. Whether it is the bolt removal of plate-mounted installations or the disassembly of connectors for wall-mounted or recessed installations, multiple fasteners must be operated one by one. This is not only time-consuming, but also prone to positioning deviations when the junction box is moved or reinstalled after maintenance, further affecting operation and maintenance efficiency.

[0004] Therefore, there is an urgent need for an IO signal junction box structure that can overcome scenario limitations and simplify the disassembly and maintenance process. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes an IO signal junction box structure with fixed mounting legs, which solves the problems of the current IO signal junction box being limited to installation scenarios, only adaptable to planar carriers, incompatible with external mounting rails, inconvenient to disassemble and maintain, requiring operation of multiple fixing parts one by one, which is time-consuming and prone to positioning deviations during reinstallation.

[0006] The technical solution of this utility model is:

[0007] An IO signal junction box structure with fixed mounting legs includes a junction box body and a pair of fixed support legs. The pair of fixed support legs are respectively disposed on both sides of the bottom of the junction box body and are detachably connected to the bottom of the junction box body.

[0008] The junction box body includes a lower box, an upper cover, and a junction assembly. The lower box has a mounting cavity that extends through the top of the lower box. The upper cover is located on the top of the lower box and is detachably connected to the lower box to close the mounting cavity. The junction assembly is located in the mounting cavity and is detachably connected to the lower box for wire connection and branching.

[0009] Each of the two fixed support legs has a snap-fit ​​groove at its top. The two sides of the lower end of the lower box body snap into the snap-fit ​​grooves at the top of the two fixed support legs and are detachably connected to the two fixed support legs. Each of the two fixed support legs has a snap-fit ​​structure at its bottom, which is used to snap into the external mounting rail.

[0010] Preferably, the snap-fit ​​structure includes an elastic mounting leg, a fixed mounting leg, and a mating limiting part. The elastic mounting leg is fixedly disposed on one side of the bottom of the fixed support leg, and the fixed mounting leg is fixedly disposed on the other side of the bottom of the fixed support leg. The mating limiting part is disposed between the elastic mounting leg and the fixed mounting leg and is fixedly connected to the bottom of the fixed support leg. The fixed mounting leg has a first track groove on the side facing the mating limiting part, and the elastic mounting leg has a second track groove on the side facing the mating limiting part. The fixed support leg can be snapped with an external mounting track through the first track groove and the second track groove.

[0011] Preferably, a first limiting block and a second limiting block are fixedly provided on the top of the fixed support leg, and the first limiting block and the second limiting block are respectively located on both sides of the snap-fit ​​groove.

[0012] Preferably, a support protrusion is fixedly provided on one side of the first limiting block.

[0013] Preferably, a pair of lid hooks are provided on both sides of the bottom of the upper cover, one end of the lid hook is fixedly connected to the bottom of the upper cover, and grooves are provided on both sides of the lower box body to cooperate with the pair of lid hooks, with the other end of the lid hooks being engaged in the grooves.

[0014] Preferably, guide protrusions are fixedly provided on both sides of the bottom of the upper cover, and guide grooves that cooperate with the guide protrusions are provided on both sides of the top of the lower box, with the guide protrusions and guide grooves slidably connected.

[0015] Preferably, the wiring assembly includes a circuit board and a wiring electrical structure. The wiring electrical structure is fixedly mounted on the circuit board and is used for wire connection and wiring. The mounting cavity has a support rib that mates with the circuit board. The circuit board is placed on the support rib. One side of the circuit board has a pair of snap-fit ​​grooves. One side of the mounting cavity has snap-fit ​​hooks that mate with the pair of snap-fit ​​grooves. The pair of snap-fit ​​hooks are fixedly mounted on the support rib. The ends of the snap-fit ​​hooks snap with the circuit board through the snap-fit ​​grooves. The other side of the mounting cavity has a pair of limiting ribs that mate with the other side of the circuit board. The circuit board is fixed in the lower box by the limiting ribs and the snap-fit ​​hooks.

[0016] Preferably, the mounting cavity is provided with a pair of board positioning tubes, which are fixedly installed on both sides of the bottom of the mounting cavity. The circuit board is provided with positioning holes on both sides that cooperate with the pair of board positioning tubes. The board positioning tubes and positioning holes are used for the mounting and positioning of the circuit board.

[0017] Preferably, each of the two fixed support legs has a positioning protrusion ring fixedly installed in its snap-fit ​​groove. The bottom of the lower box has recessed holes on both sides that cooperate with the positioning protrusion rings on the two fixed support legs. The positioning protrusion rings are snapped into the recessed holes. The lower box has a pair of self-tapping screws. One end of the self-tapping screw passes through the plate positioning tube, the recessed hole and the positioning protrusion ring, and is threaded to the plate positioning tube, the lower box and the fixed support leg respectively.

[0018] Preferably, the bottom of the upper cover is provided with screw positioning tubes corresponding to a pair of plate positioning tubes. One end of the pair of screw positioning tubes is fixedly connected to both sides of the bottom of the upper cover, and the other end is in contact with the pair of plate positioning tubes. The upper cover is provided with screw positioning holes that cooperate with the pair of screw positioning tubes, and the screw positioning holes extend into the screw positioning tubes.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention features detachable fixed support legs on both sides of the bottom of the junction box body. A snap-fit ​​groove is provided at the top of the fixed support legs for precise positioning with the junction box body. A snap-fit ​​structure is provided at the bottom of the fixed support legs to accommodate external mounting rails. Simultaneously, a splitter assembly is housed within the mounting cavity of the lower box, and the top of the lower box is sealed by a detachable upper cover. This invention employs a detachable design, breaking the limitations of traditional planar installations and broadening application scenarios. It also allows for quick assembly and disassembly, simplifying maintenance processes and reducing time consumption. Furthermore, it avoids positioning deviations during reinstallation. The structure is simple, practical, and facilitates component replacement and extends service life. It solves the problems of current IO signal junction boxes, which are limited to planar carriers, incompatible with external mounting rails, and inconvenient to disassemble and maintain, requiring the individual operation of multiple fasteners, which is time-consuming and prone to positioning deviations during reinstallation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1This is a schematic diagram of an IO signal junction box structure with fixed mounting legs as described in an embodiment of this utility model;

[0023] Figure 2 This is an exploded structural diagram of an IO signal junction box structure with fixed mounting legs as described in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the fixed support leg described in the embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the upper cover body described in this embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the lower box body described in this embodiment of the utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the structure of the lower box body described in this embodiment of the utility model. Figure 2 ;

[0028] Figure 7 This is a schematic diagram of the structure of the lower box body described in this embodiment of the utility model. Figure 3 ;

[0029] Figure 8 This is a schematic diagram of the structure of the branching component described in the embodiment of this utility model;

[0030] Explanation of reference numerals in the attached figures:

[0031] 10- Junction box body, 11- Fixed support leg, 12- Lower box body, 13- Upper cover body, 14- Junction assembly, 15- Mounting cavity, 16- Snap-fit ​​groove, 17- Snap-fit ​​structure, 18- Elastic mounting leg, 19- Fixed mounting leg, 20- Matching limiting part, 21- First track groove, 22- Second track groove, 23- First limiting block, 24- Second limiting block, 25- Supporting protrusion, 26- Box cover hook, 27- Groove, 28- Guide protrusion, 29- Guide groove, 30- Circuit board, 31- Junction electrical structure, 32- Supporting rib, 33- Snap-fit ​​groove, 34- Snap-fit ​​hook, 35- Limiting rib, 36- Plate positioning tube, 37- Positioning round hole, 38- Positioning protrusion ring, 39- Recessed hole, 40- Self-tapping screw, 41- Screw positioning tube, 42- Screw positioning hole, 43- Anti-slip rib. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0034] Furthermore, the terms "first" and "second" 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 "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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, an electrical connection, or a communication 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 embodiment of the invention according to the specific circumstances.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0038] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0039] Example:

[0040] like Figures 1 to 8 As shown, this embodiment discloses an IO signal splitter box structure with fixed mounting legs, including a splitter box body 10 and a pair of fixed support legs 11. The pair of fixed support legs 11 are respectively disposed on both sides of the bottom of the splitter box body 10 and are detachably connected to the bottom of the splitter box body 10.

[0041] The junction box body 10 includes a lower box 12, an upper cover 13, and a junction assembly 14. The lower box 12 has a mounting cavity 15 that extends through the top of the lower box 12. The upper cover 13 is located on the top of the lower box 12 and is detachably connected to the lower box 12 to close the mounting cavity 15. The junction assembly 14 is located inside the mounting cavity 15 and is detachably connected to the lower box 12 for wire connection and branching.

[0042] Each pair of fixed support legs 11 has a snap-fit ​​groove 16 at its top. The lower box body 12 is snapped into the snap-fit ​​groove 16 at the top of the pair of fixed support legs 11 on both sides, and is detachably connected to the pair of fixed support legs 11. Each pair of fixed support legs 11 has a snap-fit ​​structure 17 fixed at its bottom. The snap-fit ​​structure 17 is used to snap into an external mounting rail.

[0043] This invention features detachable fixed support legs 11 on both sides of the bottom of the junction box body 10, with snap-fit ​​grooves 16 on the top of the fixed support legs 11 for precise positioning with the junction box body 10. A snap-fit ​​structure 17 is provided at the bottom of the fixed support legs 11 to accommodate external mounting rails. Simultaneously, a splitter assembly 14 is installed within the mounting cavity 15 of the lower box 12, and the top of the lower box 12 is closed by a detachable upper cover 13. This invention adopts a detachable design, breaking the limitations of traditional planar installations and broadening application scenarios. It also allows for quick assembly and disassembly, simplifying maintenance processes and reducing time consumption. Furthermore, it avoids positioning deviations during reinstallation. The structure is simple, practical, and beneficial for component replacement and lifespan extension. This invention solves the problems of current IO signal junction boxes, which are limited to planar carriers, incompatible with external mounting rails, and inconvenient to disassemble and maintain, requiring the operation of multiple fasteners one by one, which is time-consuming and prone to positioning deviations during reinstallation.

[0044] To facilitate the engagement of the fixed support leg 11 with the external mounting rail, this embodiment is an improvement upon the above embodiment. The difference lies in that the engagement structure 17 includes an elastic mounting leg 18, a fixed mounting leg 19, and a mating limiting part 20. The elastic mounting leg 18 is fixedly disposed on one side of the bottom of the fixed support leg 11, and the fixed mounting leg 19 is fixedly disposed on the other side of the bottom of the fixed support leg 11. The mating limiting part 20 is disposed between the elastic mounting leg 18 and the fixed mounting leg 19 and is fixedly connected to the bottom of the fixed support leg 11. The fixed mounting leg 19 has a first rail groove 21 on the side facing the mating limiting part 20, and the elastic mounting leg 18 has a second rail groove 22 on the side facing the mating limiting part 20. The fixed support leg 11 can be engaged with the external mounting rail through the first rail groove 21 and the second rail groove 22.

[0045] By using the elastic mounting legs 18 and fixed mounting legs 19 on both sides of the bottom of the fixed support leg 11, and the mating limiting part 20 between them, the elastic characteristics of the elastic mounting legs 18 allow the first track slot 21 and the second track slot 22 to precisely engage with the external mounting track, thus achieving a fixed connection between the junction box and the track. The double slot design with elastic structure ensures a firm connection, simplifies track assembly and disassembly, improves compatibility with different track specifications, and enhances installation flexibility.

[0046] As a further preferred embodiment, the top of the fixed support leg 11 is fixedly provided with a first limiting block 23 and a second limiting block 24, with the first limiting block 23 and the second limiting block 24 located on both sides of the snap-fit ​​groove 16, respectively.

[0047] The first limiting block 23 and the second limiting block 24 are located on both sides of the snap-fit ​​groove 16, respectively, to laterally limit the junction box body 10 snapped into the groove, further improving the positioning accuracy of the junction box body 10 and the fixed support leg 11, preventing the body from shaking after installation, and enhancing the stability of the overall structure.

[0048] Among them, a support protrusion 25 is fixedly provided on one side of the first limiting block 23.

[0049] The support protrusion 25 is designed to facilitate the disassembly of the junction box body 10 and the fixed support leg 11, and is used to remove the fixed mounting leg 19 with a tool.

[0050] To facilitate the installation and disassembly of the upper cover 13 and the lower box 12, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that a pair of lid hooks 26 are provided on both sides of the bottom of the upper cover 13. One end of the lid hook 26 is fixedly connected to the bottom of the upper cover 13. The lower box 12 is provided on both sides with grooves 27 that cooperate with the pair of lid hooks 26. The other end of the lid hook 26 is engaged in the groove 27.

[0051] The cover hooks 26 at the bottom of the upper cover 13 engage with the grooves 27 on both sides of the lower cover 12, achieving a detachable and closed connection between the upper cover 13 and the lower cover 12. During installation, no additional fasteners are required, allowing for quick opening and closing of the upper cover 13. This facilitates the inspection and maintenance of the wiring assembly 14 within the mounting cavity 15, improving operational convenience.

[0052] The upper cover 13 has guide protrusions 28 fixed on both sides of its bottom, and the lower box 12 has guide grooves 29 on both sides of its top that cooperate with the guide protrusions 28. The guide protrusions 28 and the guide grooves 29 are slidably connected.

[0053] The guide protrusion 28 and guide groove 29 ensure that the upper cover 13 and the lower box 12 can be quickly aligned and installed.

[0054] To facilitate the installation of the splitter assembly 14, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the splitter assembly 14 includes a circuit board 30 and a splitter electrical structure 31. The splitter electrical structure 31 is fixedly mounted on the circuit board 30 and is used for wire connection and splitting. The mounting cavity 15 is provided with a support rib 32 that cooperates with the circuit board 30. The circuit board 30 is placed on the support rib 32. One side of the circuit board 30 is provided with a pair of snap-fit ​​grooves 33. One side of the mounting cavity 15 is provided with snap-fit ​​hooks 34 that cooperate with the pair of snap-fit ​​grooves 33. The pair of snap-fit ​​hooks 34 are fixedly mounted on the support rib 32. The ends of the snap-fit ​​hooks 34 are snapped with the circuit board 30 through the snap-fit ​​grooves 33. The other side of the mounting cavity 15 is fixedly provided with a pair of limiting ribs 35 that cooperate with the other side of the circuit board 30. The circuit board 30 is fixed in the lower box 12 by the limiting ribs 35 and the snap-fit ​​hooks 34.

[0055] The circuit board 30 is supported at the bottom by supporting ribs 32, and its two sides are fixed in multiple directions by snap-fit ​​hooks 34 engaging with snap-fit ​​grooves 33 and limiting ribs 35. This ensures the stability of the circuit board 30 within the mounting cavity 15, prevents vibration from causing loose electrical connections, and the detachable design facilitates the replacement and maintenance of the circuit board 30. The branch electrical structure 31 is a branch terminal in the prior art.

[0056] The mounting cavity 15 is provided with a pair of plate positioning tubes 36. The pair of plate positioning tubes 36 are fixedly installed on both sides of the bottom of the mounting cavity 15. The circuit board 30 is provided with positioning round holes 37 on both sides, which cooperate with the pair of plate positioning tubes 36. The plate positioning tubes 36 and positioning round holes 37 are used for mounting and positioning the circuit board 30.

[0057] The positioning tube 36 and positioning hole 37 on the board body facilitate positioning of the circuit board 30 during installation.

[0058] To further facilitate the assembly and disassembly of the fixed support legs 11 and the lower box 12, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that each of the locking grooves 16 on the pair of fixed support legs 11 is fixedly provided with a positioning protrusion ring 38. The bottom sides of the lower box 12 are respectively provided with recessed holes 39 that cooperate with the positioning protrusion rings 38 on the pair of fixed support legs 11. The positioning protrusion rings 38 are locked in the recessed holes 39. The lower box 12 is provided with a pair of self-tapping screws 40. One end of the self-tapping screw 40 passes through the plate positioning tube 36, the recessed hole 39 and the positioning protrusion ring 38, and is threadedly connected to the plate positioning tube 36, the lower box 12 and the fixed support legs 11 respectively.

[0059] The positioning protrusion 38 and the recessed hole 39 precisely engage to pre-position the junction box body 10 and the fixed support leg 11. Self-tapping screws 40 pass sequentially through the plate positioning tube 36, the recessed hole 39, and the positioning protrusion 38, and are threaded together to securely fix all three, thus facilitating the fixing of the fixed support leg 11 to the lower box body 12. The positioning protrusion 38 and the recessed hole 39 can be chamfered to facilitate the insertion of the positioning protrusion 38 into the recessed hole 39 for pre-installation positioning.

[0060] During installation, this structure balances positioning accuracy and connection strength, preventing relative displacement between the lower housing 12 and the fixed support leg 11. Meanwhile, the bolt connection method ensures easy disassembly and assembly, facilitating later maintenance.

[0061] The bottom of the upper cover 13 is provided with screw positioning tubes 41 corresponding to a pair of plate positioning tubes 36. One end of the pair of screw positioning tubes 41 is fixedly connected to both sides of the bottom of the upper cover 13, and the other end is in contact with a pair of plate positioning tubes 36. The upper cover 13 is provided with screw positioning holes 42 that cooperate with the pair of screw positioning tubes 41. The screw positioning holes 42 extend into the screw positioning tubes 41.

[0062] The screw positioning tube 41 contacts the plate positioning tube 36, providing axial restraint for the self-tapping screw 40. The screw positioning hole 42 provides an operating channel for the self-tapping screw 40 to be installed and removed, and positions the head of the self-tapping screw 40. This structure can effectively prevent the self-tapping screw 40 from loosening, improve the connection stability of the overall structure, and facilitate the installation and removal of the self-tapping screw 40, reducing maintenance difficulty.

[0063] As a further preferred option, the bottom of the lower housing 12 is provided with several anti-slip ribs 43. The arrangement of several anti-slip ribs 43 facilitates the installation and operation by workers.

[0064] Working principle of this utility model:

[0065] This utility model features detachable fixed support legs 11 on both sides of the bottom of the junction box body 10, with snap-fit ​​grooves 16 on the top of the fixed support legs 11 for precise positioning with the junction box body 10. A snap-fit ​​structure 17 is provided at the bottom of the fixed support legs 11 to accommodate external mounting rails. Simultaneously, a junction assembly 14 is installed within the mounting cavity 15 of the lower box 12, and the top of the lower box 12 is closed by a detachable upper cover 13. This utility model adopts a detachable design, which not only breaks the limitations of traditional planar installation and broadens application scenarios, but also allows for quick assembly and disassembly to simplify maintenance processes, reduce time consumption, and avoid positioning deviations during reinstallation. The structure is simple and practical, and facilitates component replacement and extends service life.

[0066] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An I / O signal junction box structure with fixed mounting legs, characterized in that, It includes a junction box body (10) and a pair of fixed support legs (11). The pair of fixed support legs (11) are respectively located on both sides of the bottom of the junction box body (10) and are detachably connected to the bottom of the junction box body (10). The junction box body (10) includes a lower box (12), an upper cover (13), and a junction assembly (14). The lower box (12) has an installation cavity (15) that extends through the top of the lower box (12). The upper cover (13) is located on the top of the lower box (12) and is detachably connected to the lower box (12) for sealing the installation cavity (15). The junction assembly (14) is located inside the installation cavity (15) and is detachably connected to the lower box (12) for wire connection and junction. A pair of fixed support legs (11) are provided with snap-fit ​​grooves (16) on their tops respectively. The lower box body (12) is snapped into the snap-fit ​​grooves (16) on the tops of the pair of fixed support legs (11) on both sides respectively, and is detachably connected to the pair of fixed support legs (11). A snap-fit ​​structure (17) is fixedly provided at the bottom of the pair of fixed support legs (11) respectively. The snap-fit ​​structure (17) is used to snap-fit ​​with the external mounting rail.

2. The I / O signal junction box structure with fixed mounting legs according to claim 1, characterized in that, The snap-fit ​​structure (17) includes an elastic mounting leg (18), a fixed mounting leg (19), and a mating limiting part (20). The elastic mounting leg (18) is fixedly disposed on one side of the bottom of the fixed support leg (11), and the fixed mounting leg (19) is fixedly disposed on the other side of the bottom of the fixed support leg (11). The mating limiting part (20) is disposed between the elastic mounting leg (18) and the fixed mounting leg (19) and is fixedly connected to the bottom of the fixed support leg (11). The fixed mounting leg (19) has a first track groove (21) on the side facing the mating limiting part (20), and the elastic mounting leg (18) has a second track groove (22) on the side facing the mating limiting part (20). The fixed support leg (11) can be snapped with an external mounting track through the first track groove (21) and the second track groove (22).

3. The I / O signal junction box structure with fixed mounting legs according to claim 2, characterized in that, The top of the fixed support leg (11) is fixedly provided with a first limiting block (23) and a second limiting block (24), which are located on both sides of the snap-fit ​​groove (16).

4. The I / O signal junction box structure with fixed mounting legs according to claim 3, characterized in that, A support protrusion (25) is fixedly provided on one side of the first limiting block (23).

5. The I / O signal junction box structure with fixed mounting legs according to claim 4, characterized in that, The bottom of the upper cover (13) is provided with a pair of lid hooks (26) on both sides. One end of the lid hook (26) is fixedly connected to the bottom of the upper cover (13). The lower box (12) is provided with grooves (27) on both sides that cooperate with the pair of lid hooks (26). The other end of the lid hook (26) is engaged in the groove (27).

6. The I / O signal junction box structure with fixed mounting legs according to claim 5, characterized in that, The bottom sides of the upper cover (13) are respectively provided with guide protrusions (28), and the top sides of the lower box (12) are respectively provided with guide grooves (29) that cooperate with the guide protrusions (28). The guide protrusions (28) and the guide grooves (29) are slidably connected.

7. The I / O signal junction box structure with fixed mounting legs according to claim 6, characterized in that, The branch assembly (14) includes a circuit board (30) and a branch electrical structure (31). The branch electrical structure (31) is fixedly mounted on the circuit board (30) and is used for wire connection and branching. The mounting cavity (15) is provided with a support rib (32) that cooperates with the circuit board (30). The circuit board (30) is placed on the support rib (32). A pair of snap-fit ​​grooves (33) are provided on one side of the circuit board (30). A pair of snap-fit ​​hooks (34) that cooperate with the pair of snap-fit ​​grooves (33) are provided on one side of the mounting cavity (15). A pair of snap-fit ​​hooks (34) are fixedly mounted on the support rib (32). The ends of the snap-fit ​​hooks (34) are snapped with the circuit board (30) through the snap-fit ​​grooves (33). A pair of limiting ribs (35) that cooperate with the other side of the circuit board (30) are fixedly mounted on the other side of the mounting cavity (15). The circuit board (30) is fixed in the lower box (12) through the limiting ribs (35) and the snap-fit ​​hooks (34).

8. The I / O signal junction box structure with fixed mounting legs according to claim 7, characterized in that, The mounting cavity (15) is provided with a pair of plate positioning tubes (36). The pair of plate positioning tubes (36) are fixedly installed on both sides of the bottom of the mounting cavity (15). The circuit board (30) is provided with positioning round holes (37) on both sides, which cooperate with the pair of plate positioning tubes (36). The plate positioning tubes (36) and positioning round holes (37) are used for mounting and positioning the circuit board (30).

9. The I / O signal junction box structure with fixed mounting legs according to claim 8, characterized in that, A positioning protrusion ring (38) is fixedly provided in the snap-fit ​​groove (16) on a pair of fixed support legs (11). The bottom sides of the lower box (12) are respectively provided with recessed holes (39) that cooperate with the positioning protrusion rings (38) on the pair of fixed support legs (11). The positioning protrusion ring (38) is snapped into the recessed hole (39). A pair of self-tapping screws (40) are provided in the lower box (12). One end of the self-tapping screw (40) passes through the plate positioning tube (36), the recessed hole (39) and the positioning protrusion ring (38), and is threadedly connected to the plate positioning tube (36), the lower box (12) and the fixed support leg (11) respectively.

10. The I / O signal junction box structure with fixed mounting legs according to claim 9, characterized in that, The bottom of the upper cover (13) is provided with screw positioning tubes (41) corresponding to a pair of plate positioning tubes (36). One end of the pair of screw positioning tubes (41) is fixedly connected to the two sides of the bottom of the upper cover (13), and the other end is in contact with a pair of plate positioning tubes (36). The upper cover (13) is provided with screw positioning holes (42) that cooperate with a pair of screw positioning tubes (41). The screw positioning holes (42) extend into the screw positioning tubes (41).

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