Improved low-voltage universal 86-type chassis

Abstract

The utility model relates to the technical field of weak current wiring, and particularly discloses an improved general 86 type bottom box for weak current, which is characterized in that four L-shaped line arrangement baffles are integrally formed on the inner surface of the bottom box main body, the baffles are arranged in a central symmetrical array and enclose an independent square-shaped line arrangement area for partitioning and isolating cables, the outer surface of each L-shaped line arrangement baffle is provided with an anti-skid grating, and a through circular groove is formed in the side wall. A wiring channel is left between adjacent baffles in line alignment with the circular groove, and a circular arc transition surface is arranged at the inner corner of the baffle. The utility model solves the problem of interference caused by multiple cable winding through partitioning and isolating design, realizes stable storage of reserved cables by using the grating structure, optimizes the wiring path, meets the minimum bending radius requirement of weak current cables, effectively protects the physical structure of the cables, and improves the signal transmission quality and construction efficiency of the weak current system.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage wiring technology, and in particular to an improved universal low-voltage type 86 junction box. Background Technology

[0002] The Type 86 junction box is the most common infrastructure in building electrical installations, widely used for panel mounting and cable termination in both high-voltage and low-voltage systems. In traditional high-voltage applications, cables are usually thicker and fewer in number, and the junction box mainly serves to fix the panel and simply accommodate the cables; its internal structure is often an empty cavity.

[0003] However, with the increasing prevalence of smart buildings and home networking systems, the demand for low-voltage cabling is becoming increasingly complex. Low-voltage cables are not only numerous but also have extremely high requirements for signal transmission quality and are easily susceptible to interference. Traditional 86-type junction boxes, lacking effective internal partitioning design, often result in a chaotic tangle of different types of cables after they are run through, easily causing signal crosstalk.

[0004] More importantly, to facilitate future maintenance or secondary wiring, construction specifications typically require a certain length of slack cable to be left inside the junction box. However, the interior of the existing 86-type junction box is smooth and flat, without any structure specifically for fixing or storing this slack cable. This means that the slack cable can only be haphazardly stuffed into the bottom of the box, which not only occupies panel installation space but is also prone to loosening due to its own elasticity. It can even cause the cable to break or its outer sheath to be damaged when the panel is squeezed, seriously affecting the stability and lifespan of the low-voltage system.

[0005] Therefore, this utility model proposes an improved universal low-voltage type 86 back box to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the traditional 86-type junction box, such as the lack of reasonable internal space planning, messy cables that are prone to interference, and the lack of a dedicated cable management structure that makes cables easy to loosen and be damaged, this utility model aims to provide an improved general-purpose 86-type junction box for low-voltage electrical systems with an improved structure that can effectively solve the above problems.

[0007] This utility model provides an improved universal 86-type low-voltage electrical junction box, comprising: a junction box body, the junction box body having a bottom wall and a side wall extending vertically upward around the periphery of the bottom wall, the bottom wall and the side wall forming an accommodating space; and an L-shaped cable management baffle integrally injection molded on the inner surface of the bottom wall.

[0008] The device comprises four L-shaped cable management baffles arranged in a centrally symmetrical array with the center of the main body of the box as the reference. The inner sidewalls of the four L-shaped cable management baffles together enclose and define a U-shaped cable management area located at the center of the main body of the box. This U-shaped cable management area is independent of other areas within the main body of the box to achieve cable partitioning and isolation. Each L-shaped cable management baffle has a grid on its outer surface facing away from the U-shaped cable management area. The grid consists of several anti-slip structures protruding from the surface of the L-shaped cable management baffle for winding and storing cables. The sidewall of the main body of the box has multiple circular grooves that penetrate the thickness of the sidewall. These circular grooves are distributed circumferentially along the sidewall and connect the accommodating space to the outside. The top edge of the sidewall of the main body of the box has symmetrically extending mounting lugs with fixing screw holes.

[0009] Furthermore, the base box body, the L-shaped cable management baffle, and the grille are combined through a single injection molding process, achieving integrated cable management, isolation, and storage functions.

[0010] Preferably, a gap is left between the ends of two adjacent L-shaped cable management baffles. This gap forms a wiring channel connecting the U-shaped cable management area and the area where the circular groove is located. The central axis of the wiring channel and the center of the corresponding circular groove are on the same straight line. This straight alignment layout makes the cable introduction path the shortest and without dead bends, which greatly facilitates the wiring operation.

[0011] Preferably, the grille includes a plurality of raised ribs arranged at equal intervals along the height direction of the L-shaped cable management baffle. The raised ribs extend in the horizontal direction and the cross-sectional shape of the raised ribs is semi-circular or trapezoidal. This microstructure design significantly increases the friction of the contact surface, making it less likely for the cables wrapped around it to loosen or slip off due to their own elasticity, thus improving the stability of the storage.

[0012] Preferably, the L-shaped cable management baffle is composed of two vertically connected plates. The two vertical plates have an arc transition surface at the inner corner where they connect. The radius of curvature of the arc transition surface is configured to meet the minimum bending radius requirement of the low-voltage cable. This design effectively prevents the cable from being pressed against a sharp right angle when under tension, thus preventing damage to the internal fiber core and ensuring signal transmission performance.

[0013] Preferably, there are four circular slots, which are respectively opened at the geometric center of the four side walls of the base box body. The inner edge of the circular slot is provided with a chamfer structure to prevent the cable sheath from being worn. This design with four openings and smooth edges not only provides all-round cable entry options, but also strengthens the protection of the cable insulation layer in detail.

[0014] Preferably, the vertical height of the L-shaped cable management baffle extending upward from the bottom wall is less than the vertical height of the side wall of the main body of the bottom box. The top surface of the L-shaped cable management baffle and the top surface of the side wall of the main body of the bottom box form a panel installation clearance space. This clearance design ensures that the bottom box will not interfere with the installation of a panel with a back function module, thus ensuring installation compatibility.

[0015] Preferably, the bottom wall of the base box body is further provided with a number of reinforcing ribs, which are connected between the outer surface of the L-shaped cable management baffle and the inner surface of the side wall of the base box body to enhance the structural strength and prevent the base box from deforming during injection molding cooling or installation under stress.

[0016] Preferably, the main body of the base box, the four L-shaped cable management baffles and the grille are all made of flame-retardant PC engineering plastic and are made into an integral structure through a one-time injection molding process. The flame-retardant PC engineering plastic meets the UL94V-0 fire protection standard, ensuring the high safety and durability of the device in the electrical environment.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting four L-shaped cable management baffles that are centrally symmetrically distributed inside the main body of the bottom box and enclosing them to form an independent U-shaped cable management area, the problem of unclear internal space division and mutual interference of multiple cables in traditional bottom boxes is solved, and the technical effects of physically isolating different lines, reducing signal crosstalk, and improving the transmission stability of weak current systems are achieved.

[0018] 2. In this utility model, by setting a grid with an anti-slip structure on the outer surface of the L-shaped cable management baffle, the problem of where there is nowhere to store the long cables reserved in the prior art and that they are easy to loosen and slip off due to their own rebound force is solved. This achieves the technical effect of efficiently and stably storing the excess cable by utilizing the dead space of the bottom box, and avoiding repeated cutting or forced squeezing that could damage the cable. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an improved universal low-voltage type 86 back box proposed in this utility model; Figure 2 This is a schematic diagram of the U-shaped cable management area of ​​an improved universal low-voltage 86-type junction box proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Legend: 1. Base box body; 2. Fixing screw holes; 3. L-shaped cable management baffle; 4. Grille; 5. U-shaped cable management area; 6. Circular groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Example: Please refer to Figures 1 to 3 This utility model provides an improved universal 86-type low-voltage box, which aims to solve the structural defects of existing low-voltage boxes, which lack dedicated cable management and spare capacity storage structures, resulting in messy and tangled cables, easy signal interference, and no place to fix reserved cables, making them easy to be damaged.

[0023] like Figure 1 and Figure 2 As shown, the improved universal low-voltage type 86 junction box includes a junction box body 1, fixing screw holes 2 on the junction box body 1, an L-shaped cable management baffle 3 located inside the junction box body 1, a grid 4 integrally formed on the surface of the L-shaped cable management baffle 3, a U-shaped cable management area 5 enclosed by the L-shaped cable management baffle 3, and a circular groove 6 opened on the side wall of the junction box body 1. The junction box body 1 serves as the mounting base and cable holding carrier for the entire device. The L-shaped cable management baffle 3, the grid 4, and the U-shaped cable management area 5 work together to achieve scientific zoning of the internal space and orderly management of cables.

[0024] Specifically, the main body 1 of the back box includes a horizontally arranged bottom wall and a side wall integrally connected to the periphery of the bottom wall and extending vertically upward. The bottom wall and the side wall are formed by a one-time injection molding process to form an accommodating space with an opening at the top. This accommodating space is used to place the back module of the low-voltage panel and to accommodate the cables that pass through it. Four L-shaped cable management baffles 3 are integrally injection molded on the inner surface of the bottom wall of the main body 1. The four L-shaped cable management baffles 3 are arranged in a centrally symmetrical array with the geometric center of the bottom wall of the main body 1 as the reference. Using this array layout, the inner side walls of the four L-shaped cable management baffles 3 jointly enclose and define a U-shaped cable management area 5 located in the center of the main body 1. This U-shaped cable management area 5 is independent of other areas in the main body 1 and is specifically used to centrally pass through cables and to partition and isolate cable interfaces, thereby reducing signal crosstalk between different lines in physical space.

[0025] Meanwhile, each L-shaped cable management baffle 3 has a grille 4 on its outer surface facing away from the U-shaped cable management area 5. The grille 4 consists of several anti-slip structures protruding from the surface of the L-shaped cable management baffle 3, which provide necessary frictional resistance when winding and storing cables of a reserved length to prevent the cables from naturally springing back and loosening. Multiple circular grooves 6 penetrating the thickness of the side wall are opened on the side wall of the bottom box body 1. The circular grooves 6 are evenly spaced along the circumference of the side wall and connect the receiving space with the external environment, serving as a channel for external cables to enter the bottom box. In addition, on the bottom box body Two mounting lugs extend symmetrically outward from the top edge of the side wall of box 1. Each mounting lug has a fixing screw hole 2. The box body 1 is threaded and fixed to the wall pre-embedded hole or mounting panel through the fixing screw hole 2 and screws and other fasteners. The box body 1, the four L-shaped cable management baffles 3 and the grille 4 are all made of flame-retardant PC engineering plastic and are made into an integrated structure through a one-time injection molding process. The flame-retardant PC engineering plastic meets the UL94V-0 fire protection standard, ensuring safety in environments with dense low-voltage wiring.

[0026] To address the aforementioned technical issues, this improved universal low-voltage type 86 junction box also achieves efficient cable management and safety protection through a specific internal structural layout. Please refer to the following for details. Figure 2 and Figure 3 The L-shaped cable management baffle 3 is composed of two vertically connected vertical plates. The two vertical plates have an arc transition surface at the inner corner of the connection. The radius of curvature of the arc transition surface is configured to meet the minimum bending radius requirement of the low-voltage cable. This prevents the internal fiber core from breaking or the signal transmission performance from deteriorating when the cable enters the U-shaped cable management area 5 and is pulled by force, due to being pressed against the sharp right angle. This protects the physical integrity of the cable structure.

[0027] In terms of spatial layout, there is a gap between the ends of two adjacent L-shaped cable management baffles 3. This gap forms a wiring channel connecting the U-shaped cable management area 5 and the area where the circular groove 6 is located. The central axis of this wiring channel is on the same straight line as the center of the corresponding circular groove 6. This straight alignment ensures that after the external cable passes through the circular groove 6 into the body of the bottom box 1, it can be smoothly guided straight through the wiring channel to the central U-shaped cable management area 5. This avoids unnecessary twisting or knotting of the cable during the entry process and greatly improves the wiring efficiency.

[0028] Meanwhile, the vertical height of the L-shaped cable management baffle 3 extending upward from the bottom wall is less than the vertical height of the side wall of the main body 1 of the bottom box, so that the top surface of the L-shaped cable management baffle 3 and the top surface of the side wall of the main body 1 of the bottom box form a panel installation clearance space. This design ensures that when installing a low-voltage panel with a back function module, the back component of the panel will not structurally interfere with the L-shaped cable management baffle 3. In addition, the top surface of the L-shaped cable management baffle 3 is designed to be a smooth plane, which further prevents the cable insulation layer from being scratched during installation or maintenance.

[0029] In addition, the grille 4 on the outer surface of the L-shaped cable management baffle 3 includes several raised ribs arranged at equal intervals along the height direction of the L-shaped cable management baffle 3. The raised ribs extend horizontally and their cross-sectional shape is designed to be semi-circular or trapezoidal. This surface microstructure increases the roughness and friction coefficient of the outer surface of the L-shaped cable management baffle 3. When the reserved excessively long cable is wrapped around the outside of the L-shaped cable management baffle 3, the grille 4 can effectively bite the cable sheath and prevent the coil from sliding off the baffle surface under its own elasticity, thereby achieving stable storage of the cable slack.

[0030] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, in order to prevent the cable from being damaged by friction during insertion, the inner edge of the circular groove 6 is designed with a smooth chamfer structure. This chamfer structure eliminates the sharp edges of the circular groove 6, so that when the cable passes through the circular groove 6 and is dragged or bent, its outer insulation is always in contact with the smooth chamfer surface, thereby effectively avoiding the risk of the cable outer sheath being cut or worn.

[0031] As another preferred embodiment, in order to enhance the overall structural strength of the bottom box and improve the stability of injection molding, a number of reinforcing ribs are provided on the bottom wall of the bottom box body 1. The reinforcing ribs are integrally connected between the outer surface of the L-shaped cable management baffle 3 and the inner surface of the side wall of the bottom box body 1. These reinforcing ribs can not only effectively share the lateral stress generated by the L-shaped cable management baffle 3 when it is under stress and winding the cable, preventing the baffle root from breaking, but also act as reinforcing ribs during the injection molding process to prevent the bottom wall of the bottom box body 1 from warping and deforming.

[0032] As a further preferred embodiment, in order to adapt to different cable introduction directions and improve installation flexibility, the number of circular grooves 6 is set to four, and they are respectively opened at the geometric center positions of the four side walls of the main body 1 of the box. This four-sided opening layout allows construction personnel to select the nearest circular groove 6 for wiring regardless of whether the pre-embedded pipeline comes from the top, bottom, left or right side of the wall, without having to make destructive openings to the box or forcibly twist the direction of the cable, which greatly improves the convenience and standardization of on-site construction.

[0033] As another preferred embodiment, in order to comprehensively improve the fire safety level of low-voltage circuits, the flame-retardant PC engineering plastics used in the main body 1 of the bottom box, the L-shaped cable management baffle 3 and the grille 4 are specially formulated to ensure that their combustion performance strictly meets the UL94V-0 fire protection standard. That is, after the sample undergoes two 10-second combustion tests, the flame can be extinguished within 10 seconds and no burning material can fall. This provides the highest level of passive fire protection for low-voltage systems in home and office environments.

[0034] Working principle: When low-voltage wiring is being installed, the external low-voltage cables first pass through the circular groove 6 on the side wall of the main body 1 of the junction box and enter the receiving space of the junction box. According to the direction of the incoming line, the installer selects the corresponding circular groove 6 as the entrance. After the cable enters, it is naturally and smoothly guided to the U-shaped cable management area 5 located in the center of the junction box through the wiring channel formed between the ends of the adjacent L-shaped cable management baffles 3.

[0035] During this process, the physical isolation structure of the U-shaped cable management area 5 binds these cables in the central area, preventing them from being spatially confused with the area near the side wall of the bottom box. This effectively separates the cables from the interface area on the back of the panel that will be installed later, reducing the possibility of signal crosstalk between different lines due to close parallel contact.

[0036] If the length of the inserted cable exceeds the actual connection required, the construction worker does not need to cut the excess cable. Instead, the cable is wrapped around the outer surface of the L-shaped cable management baffle 3. At this time, the grille 4, which is integrally formed on the surface of the L-shaped cable management baffle 3, plays a role. Its raised anti-slip rib structure increases the friction and grips the cable sheath. Even if the cable has a certain degree of hardness and resilience, it can be firmly stuck in the gaps or protrusions of the grille 4, preventing the coil from loosening and slipping, thus achieving neat storage of the reserved cable.

[0037] Finally, after completing the cable management and wiring operations, the main body 1 of the base box is secured to the wall or inside the mounting box through the fixing screw holes 2 on the top of the base box. Since the internal cables have been properly organized and fixed, the installation of the low-voltage panel will not be obstructed or bumped by messy cables, which greatly improves the installation efficiency and the long-term stability of the system.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An improved universal low-voltage type 86 back box, comprising a back box body (1), wherein the back box body (1) comprises a bottom wall and a side wall extending vertically upward along the periphery of the bottom wall, the bottom wall and the side wall enclosing a receiving space; Its features are: The bottom wall inner surface of the main body of the bottom box (1) is integrally injection molded with four L-shaped wire guide baffles (3), and the four L-shaped wire guide baffles (3) are arranged in a centrally symmetrical array with the center of the main body of the bottom box (1) as the reference. The inner walls of the four L-shaped cable management baffles (3) together enclose and define the U-shaped cable management area (5) located in the center of the bottom box body (1). The U-shaped cable management area (5) is independent of other areas in the bottom box body (1) to achieve the partitioning and isolation of cables. Each L-shaped cable management baffle (3) has a grille (4) on its outer surface facing away from the square cable management area (5). The grille (4) consists of several anti-slip structures protruding from the surface of the L-shaped cable management baffle (3) and is used to wrap and store cables. The bottom box body (1) has a plurality of circular grooves (6) that penetrate the thickness of the side wall. The circular grooves (6) are distributed along the circumference of the side wall and connect the accommodating space with the outside. The bottom box body (1) has symmetrical mounting lugs extending from the top edge of its side wall. The mounting lugs have fixing screw holes (2) for use with fasteners to fix the bottom box body (1) to the mounting surface.

2. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, A gap is left between the ends of two adjacent L-shaped cable management baffles (3), and the gap forms a wiring channel connecting the area where the U-shaped cable management area (5) and the circular groove (6) are located, and the central axis of the wiring channel and the center of the corresponding circular groove (6) are on the same straight line.

3. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The grille (4) includes a plurality of raised ribs arranged at equal intervals along the height direction of the L-shaped baffle (3), the raised ribs extending in the horizontal direction, and the cross-sectional shape of the raised ribs being semi-circular or trapezoidal.

4. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The L-shaped cable management baffle (3) is composed of two vertically connected vertical plates. The two vertical plates have an arc transition surface at the inner corner of the connection. The radius of curvature of the arc transition surface is configured to meet the minimum bending radius requirement of the low-voltage cable.

5. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The number of circular grooves (6) is four, and they are respectively opened at the geometric center of the four side walls of the bottom box body (1). The inner edge of the circular grooves (6) is provided with a chamfer structure to prevent the cable sheath from being worn.

6. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The vertical height of the L-shaped cable management baffle (3) extending upward from the bottom wall is less than the vertical height of the side wall of the bottom box body (1). A panel installation clearance space is formed between the top surface of the L-shaped cable management baffle (3) and the top surface of the side wall of the bottom box body (1).

7. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The bottom wall of the main body of the bottom box (1) is also provided with several reinforcing ribs. The reinforcing ribs are connected between the outer surface of the L-shaped cable management baffle (3) and the inner surface of the side wall of the main body of the bottom box (1) to enhance the structural strength.

8. The improved universal low-voltage type 86 junction box according to claim 1, characterized in that, The main body of the bottom box (1), the four L-shaped cable management baffles (3) and the grille (4) are all made of flame-retardant PC engineering plastic and are made into an integrated structure through a one-time injection molding process.

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