Junction box

Abstract

The invention discloses a junction box, which relates to the field of electrical equipment, is used for electrically connecting at least one input wire with at least one output wire, and comprises a wiring terminal group, an upper shell and a lower shell with an accommodating cavity, and the upper shell covers the lower shell to shield the accommodating cavity. The lower shell is provided with an inlet for the input wire to enter the accommodating cavity and an outlet for the output wire to extend out of the accommodating cavity; the wiring terminal group comprises an input connecting hole for connecting the input wire and an output connecting hole for connecting the output wire; a state indicating device is arranged in the containing cavity and comprises a signal detector and a state indicating lamp, the input end of the signal detector is used for being electrically connected into the output wire, and the output end of the signal detector is electrically connected to the state indicating lamp and controls on-off of the state indicating lamp according to the on-off state of the output wire. The on-off of the output wire can be visually monitored in real time, and tools are not needed.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment, and more specifically to a junction box. Background Technology

[0002] Junction boxes are common electrical accessories widely used in residential, commercial, and industrial settings. Typically, the main line from the distribution box branches at junction boxes in various areas, converting into multiple branch lines to supply power to multiple electrical devices (such as lighting fixtures, power sockets, switches, etc.) within the same area.

[0003] Currently, common junction boxes on the market consist of a housing with a cavity and terminals inside the cavity. During installation, the operator connects the input and output wires to the corresponding terminals, completes the electrical connection, and then closes the housing. However, this type of junction box only enables mechanical connection and electrical conduction; it lacks status sensing and indication capabilities. Once installed, users or maintenance personnel cannot visually determine whether the wires in each branch of the box are working properly. Especially when a branch experiences a power outage due to a loose connection, aging and broken cables, or a load failure, the troubleshooting process often requires opening the box with specialized tools (such as a test pen or multimeter), which is extremely inconvenient and poses safety risks. Summary of the Invention

[0004] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a junction box that can monitor the continuity of output wires in real time and intuitively, without the need for tools.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A junction box for electrically connecting at least one input wire to at least one output wire includes a terminal block, an upper housing, and a lower housing having a receiving cavity. The upper housing covers the lower housing to shield the receiving cavity. The lower housing has an inlet for the input wire to enter the receiving cavity and an outlet for the output wire to exit the receiving cavity. The terminal block includes an input port for connecting the input wire and an output port for connecting the output wire. A status indicator is disposed within the receiving cavity. The status indicator includes a signal detector and a status indicator light. The input terminal of the signal detector is electrically connected to the output wire, and the output terminal of the signal detector is electrically connected to the status indicator light and controls the illumination of the status indicator light according to the on / off state of the output wire.

[0006] In this application, the upper and lower housings of the junction box form a receiving cavity. An inlet and outlet on the lower housing are used for introducing input wires and leading out output wires, respectively. Input and output terminals on the terminal block are used to fix and electrically connect the input and output wires. A status indication device is also integrated within the receiving cavity, including a signal detector and a status indicator light. The input terminal of the signal detector is electrically connected to the output wire to sense the connection status of the output wire in real time. The status indicator light serves as a human-machine interface; its illumination is controlled by the output terminal of the signal detector. The user judges the continuity of the output wire by observing the illumination of the signal indicator light. When the signal indicator light is off, it indicates that no current flows through the output wire. When the signal indicator light is on, it indicates that the output wire is normally energized, thus achieving real-time and intuitive monitoring of the line status.

[0007] Optionally, a magnetic core is also provided inside the receiving cavity, and the output wire passes through the magnetic core; the signal detector is fixedly installed and adjacent to the magnetic core to detect the magnetic field generated by the current in the output wire, and the output terminal of the signal detector is electrically connected to the status indicator light; wherein, when there is current flowing through the output wire, the signal detector detects the magnetic field and outputs a signal to control the status indicator light to light up; when there is no current in the output wire, the status indicator light is off.

[0008] The magnetic core is housed within the receiving cavity, and the output wire passes directly through it. This allows the core to focus and guide the magnetic field generated by the current in the output wire, making the detection more sensitive and accurate. A signal detector is fixedly mounted near the magnetic core (e.g., in the air gap or close to its sidewall) to detect the strength of the magnetic field focused by the core. The output of the signal detector and the status indicator form a control loop. When current flows through the output wire, a ring-shaped magnetic field proportional to the current magnitude is generated around the wire due to the magnetic effect of the current. This magnetic field is further focused and strengthened by the core. Upon sensing the magnetic field, the signal detector outputs a voltage signal proportional to the magnetic field strength. Once this voltage signal reaches a certain threshold, it illuminates the status indicator. When there is no current in the output wire, the magnetic field disappears, the Hall sensor outputs nothing, and the indicator light goes out. The signal detector directly detects the presence or absence of current in the output wire; therefore, the indicator light accurately reflects whether a device is operating (i.e., there is a load current) on the wire, rather than simply whether the wire is energized. It should be noted that, depending on the signal detector, the status indicator may also include a separate power supply to power both the signal detector and the status indicator.

[0009] Optionally, the signal detector is a Hall sensor or a current transformer.

[0010] The signal detector can be a Hall sensor or a current transformer. When the signal detector is a Hall sensor, the Hall sensor works with a magnetic core, the output wire passes through the magnetic core, and the Hall sensor is fixed in the air gap or a specific position of the magnetic core. In this case, the status indication device needs to include a low-voltage power supply (such as a small battery or power module) to power the sensor and status indicator. When the signal detector is a current transformer, a built-in power supply is usually not required; the output of the current transformer can directly drive the indicator light or through a simple rectifier circuit.

[0011] Optionally, the input wire is a multi-core cable, which includes multiple thin-diameter wires. The number of the input terminal, the output terminal, and the output wire are all the same as the number of thin-diameter wires, so that the output wires and the thin-diameter wires are connected in a one-to-one correspondence. A detection branch is connected between any two thin-diameter wires. The detection branch includes a current-limiting resistor and an AC light-emitting diode connected in series.

[0012] The input conductor is a multi-core cable. The number of input and output terminals and the number of output conductors correspond to the number of thin-diameter wires within the cable, forming a one-to-one straight-through or extension connection. Inside the junction box, a detection branch is connected across any two different thin-diameter wires. Each detection branch consists of a current-limiting resistor and an AC LED connected in series, thus forming a complete monitoring network across all wire pairs. When the status indicator light is off, it may indicate an internal fault in the light, rather than a lack of power to the output conductor. Therefore, a detection branch is connected across any two different thin-diameter wires to verify whether the status indicator light is off due to a lack of power to the input conductor. If the input conductor is energized but the status indicator light is off, it at least indicates that current is still flowing into the corresponding input conductor (thin-diameter wire). This cross-validation monitoring network eliminates false alarms caused by faulty monitoring components, thereby improving the reliability of the system diagnostics.

[0013] Optionally, the lower housing includes a bottom wall and side walls disposed around the bottom wall, at least one of the side walls having a light-transmitting hole, and the status indicator light being at least partially located within the light-transmitting hole.

[0014] The lower housing includes a bottom wall and side walls surrounding the bottom wall, which ultimately enclose a receiving cavity. A light-transmitting hole for light transmission is opened on at least one side wall. A status indicator light is arranged inside the lower housing, and its light-emitting part is physically aligned with the light-transmitting hole, ensuring that at least its light-emitting part is placed in the light-transmitting hole, or closely facing the light-transmitting hole, to ensure an unobstructed light path.

[0015] Optionally, a guide groove is provided on the inner side of the bottom wall. The guide groove is elongated and extends along the length of the lower housing. A guide protrusion adapted to the guide groove is provided at the bottom of the terminal block assembly. The terminal block assembly is embedded into the guide groove through the guide protrusion.

[0016] The guide groove is located on the inner side of the bottom wall. It is elongated and extends in the same direction as the length of the lower housing. The guide protrusion is located at the bottom of the terminal block assembly, and its shape and size match the guide groove on the bottom wall.

[0017] Optionally, a mounting surface is formed on the outer side of the bottom wall, and mounting ears are distributed around the mounting surface.

[0018] The outer side of the bottom wall forms a flat mounting surface, which is the part of the junction box that contacts the mounting base (such as a wall). Mounting ears are located around the perimeter of the mounting surface, with multiple ears distributed throughout. These ears are protrusions or extensions with mounting holes (such as screw holes). The mounting surface of the junction box's bottom wall is placed firmly against the predetermined mounting location, such as the wall surface. Fasteners (such as screws or bolts) are then passed through the mounting holes and screwed into the corresponding positions on the mounting base. Finally, the fasteners are tightened, pressing the mounting surface of the junction box firmly against the mounting base through the mounting ears, thus completing the overall fixation of the junction box.

[0019] Optionally, the upper housing and the lower housing are hinged together by a hinge axis.

[0020] The upper and lower housings are connected by a hinge shaft, allowing the upper housing to rotate relative to the lower housing around the axis of the hinge shaft. This enables the upper and lower housings to be flipped open and closed, preventing the upper housing from being completely separated from the lower housing. This facilitates wiring operations and daily maintenance, and prevents the upper housing from being lost.

[0021] Optionally, the upper housing is provided with a buckle on the side away from the hinge axis, and the lower housing is provided with a snap hole that engages with the buckle on the side away from the hinge axis.

[0022] The latch is located on the upper housing, on the side furthest from the hinge axis. The latch is constructed as a raised structure with a flexible, hook-shaped head. A locking hole is located on the lower housing, corresponding to the latch position. The locking hole is shaped as a groove or hole that matches the latch head. When the user closes the upper housing downwards around the hinge axis, the latch on the upper housing contacts and presses against the edge of the lower housing. Under pressure, the latch deforms using its elasticity. When it reaches the position aligned with the locking hole, the latch quickly springs back, its head embedding into the locking hole, forming a mechanical interlock. This prevents the lid from popping open due to vibration, cable pulling, or accidental impact, thus improving the level of safety.

[0023] Optionally, a rubber sealing ring is provided at both the inlet and the outlet, and the inner diameter of the rubber sealing ring is adapted to the outer diameter of the input wire or the output wire.

[0024] When the wire passes through the rubber sealing ring, because the inner diameter of the sealing ring is smaller than the outer diameter of the wire, the rubber material will undergo elastic deformation, thereby wrapping around the outer insulation layer of the wire to form a sealing interface, which improves the protection level of the junction box and ensures the safety and reliability of the internal electrical connection.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the junction box in an embodiment of the present invention; Figure 2 for Figure 1 An explosion diagram; Figure 3 This is a schematic diagram of the terminal block assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the working principle of two thin-diameter wires and the detection branch in an embodiment of the present invention.

[0027] The components include: 1. Terminal block; 11. Input port; 12. Output port; 13. Guide protrusion; 2. Upper housing; 3. Lower housing; 31. Receiving cavity; 32. Signal indicator light; 33. Bottom wall; 331. Guide groove; 332. Mounting ear; 34. Side wall; 341. Light-transmitting hole; 35. Inlet; 36. Outlet; 4. Input wire; 41. Fine diameter wire; 5. Output wire; 6. Current-limiting resistor; 7. AC light-emitting diode; 8. Hinge shaft. Detailed Implementation

[0028] 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 are intended to explain the present invention and should not be construed as limiting the invention.

[0029] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0030] Example: like Figures 1 to 3 As shown, this embodiment provides a junction box for electrically connecting at least one input wire 4 to at least one output wire 5. It includes a terminal block 1, an upper housing 2, and a lower housing 3 with a receiving cavity 31. The upper housing 2 covers the lower housing 3 to shield the receiving cavity 31. The lower housing 3 is provided with an inlet 35 for the input wire 4 to enter the receiving cavity 31 and an outlet 36 for the output wire 5 to exit the receiving cavity 31. The terminal block 1 includes an input port 11 for connecting the input wire 4 and an output port 12 for connecting the output wire 5. A status indicator is provided inside the receiving cavity 31. The status indicator includes a signal detector and a status indicator light. The input terminal of the signal detector is electrically connected to the output wire 5, and the output terminal of the signal detector is electrically connected to the status indicator light and controls the illumination of the status indicator light according to the on / off state of the output wire 5.

[0031] In this embodiment, the upper housing 2 and lower housing 3 of the junction box form a receiving cavity 31. The inlet 35 and outlet 36 on the lower housing 3 are used to introduce the input wire 4 and lead out the output wire 5, respectively. The input terminal 11 and output terminal 12 on the terminal block 1 are used to fix and electrically connect the input wire 4 and the output wire 5. A status indicator device is also integrated within the receiving cavity 31, including a signal detector and a status indicator light. The input end of the signal detector is electrically connected to the output wire 5 to sense the connection status of the output wire 5 in real time. The status indicator light serves as a human-machine interface; its illumination is controlled by the output end of the signal detector. The user judges the continuity of the output wire 5 by observing the illumination of the signal indicator light 32. When the signal indicator light 32 is off, it indicates that no current flows through the output wire 5. When the signal indicator light 32 is on, it indicates that the output wire 5 is normally energized, thus achieving real-time and intuitive monitoring of the line status. It should be noted that the user can observe the status indicator light without opening the upper housing 2, thereby quickly diagnosing faults and greatly improving safety and maintenance efficiency.

[0032] Specifically, the lower housing 3 may have a through hole opposite to the status indicator light, so that the light of the status indicator light can be exposed through the through hole, allowing the user to observe the status indicator light's on / off state without opening the housing. Alternatively, the upper housing 2 may be made of a transparent or semi-transparent material, so that the user can directly observe the status indicator light's on / off state within the receiving cavity 31.

[0033] A magnetic core is also provided inside the cavity 31, and the output wire 5 passes through the magnetic core. A signal detector is fixedly installed and adjacent to the magnetic core to detect the magnetic field generated by the current in the output wire 5. The output end of the signal detector is electrically connected to the status indicator light. When there is current flowing through the output wire 5, the signal detector detects the magnetic field and outputs a signal to control the status indicator light to light up. When there is no current in the output wire 5, the status indicator light is off.

[0034] In this embodiment, the magnetic core is disposed within the receiving cavity 31, and the output wire 5 passes directly through the magnetic core. This allows the magnetic core to focus and guide the magnetic field generated by the current in the output wire 5, making the detection more sensitive and accurate. A signal detector is fixedly installed near the magnetic core (e.g., in the air gap or close to its sidewall 34) to detect the strength of the magnetic field focused by the magnetic core. The output of the signal detector and the status indicator light form a control loop. When current flows through the output wire 5, a ring-shaped magnetic field proportional to the current magnitude is generated around the output wire 5 according to the magnetic effect of the current. This magnetic field is further focused and strengthened by the magnetic core. After sensing the magnetic field, the signal detector outputs a voltage signal proportional to the magnetic field strength. When this voltage signal reaches a certain threshold, it drives the status indicator light to illuminate. When there is no current in the output wire 5, the magnetic field disappears, the Hall sensor has no output, and the indicator light goes out. The signal detector directly detects whether there is current in the output wire 5; therefore, the illumination of the indicator light accurately reflects whether a device is operating (i.e., there is a load current) on the wire, rather than simply whether the wire is energized. It should be noted that, depending on the signal detector, the status indicator may also include a power supply for independent power supply to power the signal detector and status indicator lights.

[0035] The signal detector is a Hall sensor or a current transformer.

[0036] In this embodiment, the signal detector can be a Hall sensor or a current transformer. When the signal detector is a Hall sensor, the Hall sensor cooperates with the magnetic core, the output wire 5 passes through the magnetic core, and the Hall sensor is fixed in the air gap or a specific position of the magnetic core. In this case, the status indication device needs to include a low-voltage power supply (such as a small battery or power module) to power the sensor and the status indicator. When the signal detector is a current transformer, a built-in power supply is usually not required, and the output of the current transformer can directly drive the indicator light or through a simple rectifier circuit.

[0037] like Figures 2 to 4 As shown, the input wire 4 is a multi-core cable, which includes multiple thin-diameter wires 41. The number of input terminals 11, output terminals 12 and output wires 5 are consistent with the number of thin-diameter wires 41 so that the output wires 5 and thin-diameter wires 41 are connected in a one-to-one correspondence. A detection branch is connected between any two thin-diameter wires 41. The detection branch includes a current-limiting resistor 6 and an AC light-emitting diode 7 connected in series.

[0038] In this embodiment, the input wire 4 is a multi-core cable. The number of input terminals 11, output terminals 12, and output wires 5 is the same as the number of thin-diameter wires 41 inside the cable, forming a one-to-one straight-through or extended connection. Inside the junction box, a detection branch is connected across any two different thin-diameter wires 41. Each detection branch consists of a current-limiting resistor 6 and an AC light-emitting diode 7 connected in series, thus forming a complete monitoring network between all wire pairs. When the status indicator light is off, it may be due to internal damage to the light, rather than the output wire 5 not being energized. Therefore, a detection branch is connected across any two different thin-diameter wires 41 to verify whether the status indicator light is off because the input wire 4 is not energized. When the input wire 4 is energized normally, but the status indicator light is off, it can at least be determined that current is still input at the corresponding input wire 4 (thin-diameter wire 41). That is, by constructing a cross-validation monitoring network, false judgments caused by the failure of the monitoring element itself are eliminated, thereby improving the reliability of system diagnosis.

[0039] The lower housing 3 includes a bottom wall 33 and side walls 34 disposed around the bottom wall 33. At least one side wall 34 has a light-transmitting hole 341, and the status indicator light is at least partially located in the light-transmitting hole 341.

[0040] In this embodiment, the lower housing 3 includes a bottom wall 33 and side walls 34 surrounding the bottom wall 33, ultimately forming a receiving cavity 31. A light-transmitting hole 341 for light propagation is formed on at least one side wall 34. A status indicator light is arranged inside the lower housing 3, and its light-emitting part is physically aligned with the light-transmitting hole 341, ensuring that at least its light-emitting part is placed in the light-transmitting hole 341, or closely facing the light-transmitting hole 341, to ensure that the light path is unobstructed.

[0041] A guide groove 331 is provided on the inner side of the bottom wall 33. The guide groove 331 is elongated and extends along the length of the lower housing 3. A guide protrusion 13 adapted to the guide groove 331 is provided at the bottom of the terminal block 1. The terminal block 1 is embedded into the guide groove 331 through the guide protrusion 13.

[0042] In this embodiment, the guide groove 331 is disposed on the inner side of the bottom wall 33, and its shape is elongated, with its extension direction consistent with the length direction of the lower housing 3. The guide protrusion 13 is disposed at the bottom of the terminal block 1, and its shape and size match the guide groove 331 on the bottom wall 33.

[0043] A mounting surface is formed on the outer side of the bottom wall 33, and mounting ears 332 are distributed around the mounting surface.

[0044] In this embodiment, a flat mounting surface is formed on the outer side of the bottom wall 33. This mounting surface is the part of the junction box that contacts the mounting base (such as a wall). Mounting ears 332 are located around the perimeter of the mounting surface, and multiple mounting ears 332 are distributed thereon. Each mounting ear 332 is a protrusion or extension with fixing holes (such as screw holes). The mounting surface of the bottom wall 33 of the junction box is pressed tightly against the predetermined mounting position, such as the wall surface. Fasteners (such as screws or bolts) are then passed through the fixing holes and screwed into the corresponding positions on the mounting base. Finally, the fasteners are tightened, and the mounting ears 332 press the mounting surface of the junction box firmly against the mounting base, completing the overall fixation of the junction box.

[0045] The upper housing 2 and the lower housing 3 are hinged together by a hinge shaft 8.

[0046] In this embodiment, the upper housing 2 and the lower housing 3 are connected together by a hinge shaft 8, so that the upper housing 2 can rotate relative to the lower housing 3 around the axis of the hinge shaft 8, realizing the flipping and opening of the upper housing 2 and the lower housing 3, avoiding the upper housing 2 from being completely separated from the lower housing 3, thereby facilitating wiring operations and daily maintenance, and preventing the upper housing 2 from being lost.

[0047] The upper housing 2 has a buckle on the side away from the hinge shaft 8, and the lower housing 3 has a snap hole on the side away from the hinge shaft 8 that engages with the buckle.

[0048] In this embodiment, the latch is located on the upper housing 2, on the side away from the hinge axis 8. The latch is constructed as a protruding structure with elasticity and a hook-shaped head. The latch hole is located on the lower housing 3, corresponding to the position of the latch. The latch hole is shaped as a groove or hole that matches the head of the latch. When the user closes the upper housing 2 downwards around the hinge axis 8, the latch of the upper housing 2 contacts and presses against the edge of the lower housing 3. Under pressure, the latch deforms using its own elasticity. When it moves to a position aligned with the latch hole, the latch quickly rebounds, and its head embeds into the latch hole, forming a mechanical interlock. This prevents the lid from popping open due to vibration, cable pulling, or accidental collision, thus improving the level of safety protection.

[0049] Rubber sealing rings are installed at both the inlet 35 and the outlet 36, and the inner diameter of the rubber sealing rings is adapted to the outer diameter of the input wire 4 or the output wire 5.

[0050] In this embodiment, when the wire passes through the rubber sealing ring, the rubber material undergoes elastic deformation because the inner diameter of the sealing ring is smaller than the outer diameter of the wire. This causes the rubber material to wrap around the outer insulation layer of the wire, forming a sealed interface, which improves the protection level of the junction box and ensures the safety and reliability of the internal electrical connections.

[0051] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A junction box for electrically connecting at least one input wire to at least one output wire, characterized in that, The device includes a terminal block assembly, an upper housing, and a lower housing with a receiving cavity. The upper housing covers the lower housing to shield the receiving cavity. The lower housing has an inlet for an input wire to enter the receiving cavity and an outlet for an output wire to exit the receiving cavity. The terminal block assembly includes an input terminal for connecting the input wire and an output terminal for connecting the output wire. A status indicator is provided inside the receiving cavity. The status indicator includes a signal detector and a status indicator light. The input terminal of the signal detector is electrically connected to the output wire, and the output terminal of the signal detector is electrically connected to the status indicator light and controls the status indicator light to turn on or off according to the on / off state of the output wire.

2. The junction box according to claim 1, characterized in that, A magnetic core is also provided inside the cavity, and the output wire passes through the magnetic core; the signal detector is fixedly installed and adjacent to the magnetic core to detect the magnetic field generated by the current in the output wire, and the output terminal of the signal detector is electrically connected to the status indicator light; wherein, when there is current flowing through the output wire, the signal detector detects the magnetic field and outputs a signal to control the status indicator light to light up; when there is no current in the output wire, the status indicator light is off.

3. The junction box according to claim 2, characterized in that, The signal detector is a Hall sensor or a current transformer.

4. The junction box according to claim 1, characterized in that, The input conductor is a multi-core cable, which includes multiple thin-diameter wires. The number of input terminals, output terminals, and output conductors are all the same as the number of thin-diameter wires, so that the output conductors and the thin-diameter wires are connected in a one-to-one correspondence. A detection branch is connected between any two thin-diameter wires. The detection branch includes a current-limiting resistor and an AC light-emitting diode connected in series.

5. The junction box according to claim 1, characterized in that, The lower housing includes a bottom wall and side walls disposed around the bottom wall. At least one of the side walls has a light-transmitting hole, and the status indicator light is at least partially located within the light-transmitting hole.

6. The junction box according to claim 5, characterized in that, A guide groove is provided on the inner side of the bottom wall. The guide groove is elongated and extends along the length of the lower housing. A guide protrusion adapted to the guide groove is provided at the bottom of the terminal block assembly. The terminal block assembly is embedded into the guide groove through the guide protrusion.

7. The junction box according to claim 5, characterized in that, A mounting surface is formed on the outer side of the bottom wall, and mounting ears are distributed around the mounting surface.

8. The junction box according to claim 1, characterized in that, The upper housing and the lower housing are hinged together by a hinge shaft.

9. The junction box according to claim 8, characterized in that, The upper housing has a buckle on the side away from the hinge axis, and the lower housing has a locking hole on the side away from the hinge axis that engages with the buckle.

10. The junction box according to any one of claims 1-9, characterized in that, Both the inlet and the outlet are equipped with rubber sealing rings, and the inner diameter of the rubber sealing rings is adapted to the outer diameter of the input wire or the output wire.

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