A terminal block and a method of wiring

Abstract

The application discloses a terminal box and a terminal method. The terminal box comprises a box body, a plug sleeve, a pressing plate and a bottom plate. The box body comprises a body part and a plug-in part in communication. A diode is mounted on the body part, and a cable is mounted on the plug-in part. The diode and the cable are electrically connected through the plug sleeve to realize current transmission. The pressing plate and the bottom plate are connected to two sides of the plug-in part along the height direction of the terminal box, and the pressing plate can move along the direction relative to the plug-in part. The pressing plate is provided with a first matching part, the plug-in part is provided with a first limiting part and a second limiting part, and along the height direction of the terminal box, the first limiting part is located on the side of the second limiting part facing the pressing plate. When the first matching part is in clamping cooperation with the first limiting part, the pressing plate can be connected with the box body as a whole for transportation, so that the transportation cost is reduced. When the first matching part is in clamping cooperation with the second limiting part, the pressing plate and the bottom plate clamp the cable, so that the stability and reliability of the connection between the cable and the box body are improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic junction box technology, and in particular to a junction box and wiring method. Background Technology

[0002] With the rapid development of the photovoltaic industry, the application of floating photovoltaic systems is becoming increasingly widespread. In existing floating photovoltaic systems, adjacent photovoltaic modules are mainly electrically connected through junction boxes, cables, and connectors. Specifically, the junction box is installed on the back side of the photovoltaic module, and the connectors include a positive connector and a negative connector. During the electrical connection between two adjacent photovoltaic modules, the junction box of one photovoltaic module is connected to the negative connector of the junction box of another photovoltaic module through a positive connector. The two connectors are then fixed to the back of the photovoltaic module with cable ties to prevent contact with water while enabling current transmission between modules. During the operation of the photovoltaic modules, the connectors are prone to detaching from the photovoltaic modules due to wind and waves, leaving them suspended in the air. This results in low reliability of the electrical connection between adjacent photovoltaic modules and even the risk of them falling into the water, posing a significant safety hazard. Summary of the Invention

[0003] In view of this, this application provides a junction box and wiring method to solve the technical problem in the prior art that connectors are easily detached from photovoltaic modules under the action of wind and waves.

[0004] This application provides a junction box, which includes a box body, a socket, a pressure plate, and a base plate. The box body includes a communicating body portion and a plug-in portion. The body portion has a first receiving cavity for accommodating a diode, and the plug-in portion has a second receiving cavity for accommodating a cable. The socket is located in the second receiving cavity, with one end of the socket connected to the cable and the other end of the socket extending into the first receiving cavity and connected to the diode. The pressure plate and the base plate are connected to both sides of the plug-in portion along the height direction of the junction box, and the pressure plate is movable relative to the plug-in portion along the height direction of the junction box. The pressure plate is provided with a first mating portion, and the plug-in portion is provided with a first limiting portion and a second limiting portion. Along the height direction of the junction box, the first limiting portion is located on the side of the second limiting portion facing the pressure plate. When the junction box is in a first state, the first mating portion engages with the first limiting portion; when the junction box is in a second state, the first mating portion engages with the second limiting portion.

[0005] In this embodiment, by providing a plug-in portion on the box body that communicates with the main body, the cable can extend into the box body and connect with the socket. That is, the connection position between the two is moved from the outside of the junction box to the inside of the junction box, so that the box body can fix and seal the connection between the cable and the socket, preventing them from being suspended in the air and reducing the possibility of swaying or even falling into the water under the action of wind and waves. This helps to improve the stability and reliability of the connection between the socket and the cable, thereby improving the safety of the junction box during operation, making the current transmission more stable, and thus ensuring the reliability of the photovoltaic module during operation.

[0006] During the connection of the cable to the junction box, when the junction box is in the first state, the first mating part of the pressure plate engages with the first limiting part of the plug-in part to create a larger gap between the pressure plate and the base plate. At this time, the cable can extend into the second receiving cavity of the plug-in part and engage with the plug sleeve to achieve the connection between the cable and the junction box. When the junction box is in the second state, the first mating part of the pressure plate engages with the second limiting part of the plug-in part to create a smaller gap between the pressure plate and the base plate. At this time, the pressure plate and the base plate can clamp the cable along the height direction of the junction box to achieve the fixation between the cable and the junction box.

[0007] Therefore, when the junction box is in the first state, the pressure plate and the box body can be transported as a whole after connection, which reduces transportation costs and shortens the assembly time between the two. In addition, the pressure plate and the base plate can form an installation space to accommodate the cable. During the connection process between the cable and the box body, it is beneficial to improve the assembly efficiency between the cable and the box body. When the junction box is in the second state, the pressure plate and the base plate clamp the cable along the height direction of the junction box to improve the stability and reliability of the connection between the cable and the box body, reduce the possibility of the cable detaching from the box body, and further improve the stability of current transmission between the cable and the socket, thereby ensuring the reliability of the junction box during operation.

[0008] In one possible implementation, the first limiting portion includes a first guide surface and a first mating surface, the second limiting portion includes a second guide surface and a second mating surface, and the first mating portion includes a third guide surface and a third mating surface.

[0009] Along the width and height directions of the junction box, when the junction box is in the first state, the third mating surface abuts against the first mating surface, and the third guide surface abuts against the second guide surface; when the junction box is in the second state, the third mating surface abuts against the second mating surface.

[0010] In one possible implementation, the first limiting portion and the second limiting portion are arranged adjacent to each other along the length direction of the junction box. The first mating portion further includes a first through hole. When the junction box is in a first state, the first limiting portion is located in the first through hole. When the junction box is in a second state, both the first limiting portion and the second limiting portion are located in the first through hole to restrict the movement of the pressure plate relative to the plug-in portion along the length direction of the junction box.

[0011] In one possible implementation, the pressure plate is further provided with a second mating part, and the plug-in part is further provided with a first limiting groove. When the junction box is in a first state, at least a portion of the second mating part is located in the first limiting groove. When the junction box is in a second state, the second mating part is located in the first limiting groove and abuts against the bottom wall of the first limiting groove.

[0012] In one possible implementation, the pressure plate is further provided with a pressing part, and the base plate is provided with a third mating part. Along the height direction of the junction box, the projection of the pressing part and the projection of the third mating part overlap, and both the pressing part and the third mating part are arc-shaped structures.

[0013] In one possible implementation, the pressing part is provided with a plurality of first protrusions, and the third mating part is provided with a plurality of second protrusions. The plurality of first protrusions and the plurality of second protrusions are distributed at intervals along the width direction of the junction box, and the surfaces of the first protrusions and the second protrusions that contact the cable are both arc surfaces or planes.

[0014] In one possible implementation, the second receiving cavity includes a first cavity and a second cavity that are connected to each other. Along the length of the junction box, the first cavity is located on the side of the second cavity closer to the first receiving cavity, and at least a portion of the socket is located in the first cavity.

[0015] One of the sleeve and the side wall of the first cavity is provided with a second limiting groove, and the other is provided with a third protrusion. The second limiting groove and the third protrusion are engaged.

[0016] In one possible implementation, along the height direction of the junction box, the plug portion has a first opening on the side facing the base plate, and the base plate is also provided with a fourth mating portion, the fourth mating portion blocking the first opening and forming the first cavity with the plug portion, and the fourth mating portion is provided with a second limiting groove or the third protrusion.

[0017] This application also provides a wiring method, using a junction box as described in any of the above claims for wiring, for fixing the cable inside the junction box, the wiring method comprising:

[0018] The socket is installed in the plug-in part and soldered to the diode; the base plate is soldered to the plug-in part; the pressure plate is engaged with the first limiting part, and the junction box is in a first state; the cable is inserted into the plug-in part and engaged with the socket; the pressure plate is engaged with the second limiting part, and the junction box is in a second state, with the pressure plate and the base plate clamping the cable.

[0019] In this embodiment, one end of the socket is welded to the diode, and the other end is snapped into the cable, enabling the cable to be electrically connected to the diode through the socket, which improves the stability of current transmission among the three. Simultaneously, the base plate is welded to the connector after the socket is installed inside, sealing the socket within the connector to reduce the possibility of moisture affecting the socket and cable, thus improving the reliability of the junction box during operation.

[0020] In addition, the pressure plate is provided with a first mating part, and the plug-in part is provided with a first limiting part and a second limiting part. Along the height direction of the junction box, the first limiting part is located on the side of the second limiting part facing the pressure plate. During the connection process between the pressure plate and the plug-in part, the pressure plate can move towards the base plate along the height direction of the junction box under the action of external force, so that the pressure plate sequentially engages with the first limiting part and the second limiting part, thereby enabling the pressure plate and the base plate to clamp the cable along the height direction of the junction box.

[0021] When the pressure plate engages with the first limiting part, the junction box is in its first state. At this time, along the height direction of the junction box, the third guide surface of the first mating part abuts against the second guide surface of the second limiting part, and the third mating surface of the first mating part abuts against the first mating surface of the first limiting part. Specifically, the first limiting part restricts the upward movement of the pressure plate along the height direction of the junction box via the first mating surface, and the second limiting part restricts the downward movement of the pressure plate along the height direction of the junction box via the second guide surface. In this first state, the pressure plate is less likely to come into contact with the first limiting part, allowing the pressure plate to be packaged and transported together with the box body, which helps reduce transportation costs. Furthermore, during the connection of the cable and the box body, the assembly time between them can be shortened, thereby improving the assembly efficiency of the cable and the box body.

[0022] When the pressure plate engages with the second limiting part, the junction box is in its second state. At this time, along the height direction of the junction box, the third mating surface of the first mating part abuts against the second mating surface of the second limiting part. The second limiting part, through its second mating surface, restricts the upward movement of the pressure plate along the height direction of the junction box. In this second state, the pressure plate and the base plate can clamp the cable along the height direction of the junction box, improving the stability and reliability of the connection between the cable and the box body, reducing the possibility of the cable detaching from the box body, and further improving the stability of current transmission between the cable and the socket, thereby ensuring the reliability of the junction box during operation.

[0023] In one possible implementation, the second receiving cavity is provided with a second limiting groove, and the plug sleeve is provided with a third protrusion. When the plug sleeve is installed in the plug-in portion, the wiring method further includes: installing the plug sleeve in the plug-in portion and positioning the third protrusion in the second limiting groove.

[0024] The base plate is provided with the second limiting groove. When the base plate is welded to the plug-in part, the wiring method further includes: engaging the second limiting groove with the third protrusion.

[0025] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the junction box provided in this application in one embodiment;

[0028] Figure 2 yes Figure 1 A sectional view;

[0029] Figure 3 yes Figure 1 Exploded view;

[0030] Figure 4 This is a schematic diagram of the structure of the box body provided in this application in one embodiment;

[0031] Figure 5 yes Figure 4 A magnified view of a local area I in the middle;

[0032] Figure 6 yes Figure 4 A sectional view;

[0033] Figure 7 This is a schematic diagram of the structure of the socket provided in this application in one embodiment;

[0034] Figure 8 This is a schematic diagram of the structure of the pressure plate provided in this application in one embodiment;

[0035] Figure 9 yes Figure 8 A sectional view;

[0036] Figure 10 This is a schematic diagram of the structure of the base plate provided in this application in one embodiment;

[0037] Figure 11 This is a schematic diagram of the junction box provided in this application in its first state;

[0038] Figure 12 This is a schematic diagram of the junction box provided in this application in its second state.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Box body;

[0041] 11-Body part;

[0042] 111 - First receiving cavity;

[0043] 112 - Cover plate;

[0044] 12-Connector;

[0045] 121 - Second receiving cavity;

[0046] 121a - First cavity;

[0047] 121a1 - Second limiting groove;

[0048] 121b - Second cavity;

[0049] 122 - First limiting part;

[0050] 122a - First guide surface;

[0051] 122b - First mating surface;

[0052] 123 - Second limiting part;

[0053] 123a - Second guide surface;

[0054] 123b - Second mating surface;

[0055] 124 - First limiting groove;

[0056] 125 - First opening;

[0057] 126 - Third limiting part;

[0058] 127-Extension;

[0059] 127a - Second through hole;

[0060] 2-Socket;

[0061] 21-Third protrusion;

[0062] 3-Pressure plate;

[0063] 31-First Coordination Unit;

[0064] 311 - Third guide surface;

[0065] 312 - Third mating surface;

[0066] 313 - First through hole;

[0067] 32-Second Coordination Unit;

[0068] 33 - Pressing part;

[0069] 331 - First protrusion;

[0070] 4-Base plate;

[0071] 41-Third Coordination Unit;

[0072] 411 - Second protrusion;

[0073] 42-Fourth Coordination Unit;

[0074] 5-Seals;

[0075] 6-Diode;

[0076] 7-Cables;

[0077] 71-Plug;

[0078] 711-Fifth Coordination Unit

[0079] 72-Cable.

[0080] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0081] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0082] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0083] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0084] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0085] Embodiments of this application provide a junction box for photovoltaic modules, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the junction box includes a body 1, a socket 2, a pressure plate 3, and a base plate 4. The body 1 includes a connected main body 11 and a plug-in part 12. The main body 11 has a first receiving cavity 111 for accommodating a diode 6. The plug-in part 12 has a second receiving cavity 121 for accommodating a cable 7. The socket 2 is located in the second receiving cavity 121, and one end of the socket 2 is connected to the cable 7. The other end of the socket 2 extends into the first receiving cavity 111 and is connected to the diode 6. The pressure plate 3 and the base plate 4 are connected to both sides of the plug-in part 12 along the height direction of the junction box, and the pressure plate 3 can move relative to the plug-in part 12 along the height direction of the junction box.

[0086] In this embodiment, by providing a plug-in portion 12 on the housing 1 that communicates with the main body 11, the cable 7 can extend into the housing 1 and connect with the socket 2. That is, the connection position between the two is moved from the outside of the junction box to the inside of the junction box, so that the housing 1 can fix and seal the connection between the cable 7 and the socket 2, which can prevent the two from being suspended in the air and reduce the possibility of shaking or even falling into the water under the action of wind and waves. This is beneficial to improving the stability and reliability of the connection between the socket 2 and the cable 7, thereby improving the safety of the junction box during operation, making the current transmission more stable, and thus ensuring the reliability of the photovoltaic module during operation.

[0087] The main body 11 and the plug-in part 12 can be integrally molded, which helps to improve the overall structural strength of the box 1, reduces the possibility of the main body 11 and the plug-in part 12 separating from each other, and eliminates the need for conductive parts between the main body 11 and the plug-in part 12, which helps to simplify the structure of the junction box, reduce the volume of the junction box, and thus reduce the production cost of the junction box while achieving the goal of lightweighting.

[0088] Meanwhile, the socket 2 and the diode 6 are fixedly connected by welding to improve the stability and reliability of the connection between the two, which is conducive to further improving the current transmission effect.

[0089] In addition, the first receiving cavity 111 also has a second opening (not shown in the figure). The diode 6 is installed in the first receiving cavity 111 through the second opening. The body part 11 also includes a cover plate 112, which is used to block the second opening so that the first receiving cavity 111 is in a sealed state, reducing the possibility of moisture entering the first receiving cavity 111 through the second opening, so as to ensure the stability and reliability of the junction box during operation.

[0090] like Figure 5 and Figure 8 As shown, the pressure plate 3 is provided with a first mating part 31, and the plug-in part 12 is provided with a first limiting part 122 and a second limiting part 123. Along the height direction of the junction box, the first limiting part 122 is located on the side of the second limiting part 123 facing the pressure plate 3. When the junction box is in the first state, the first mating part 31 and the first limiting part 122 are engaged. When the junction box is in the second state, the first mating part 31 and the second limiting part 123 are engaged.

[0091] Specifically, during the connection of the cable 7 to the box 1, when the junction box is in the first state, the first mating part 31 of the pressure plate 3 engages with the first limiting part 122 of the plug-in part 12 to create a larger gap between the pressure plate 3 and the base plate 4. At this time, the cable 7 can extend into the second receiving cavity 121 of the plug-in part 12 and engage with the plug sleeve 2 to achieve the connection between the cable 7 and the box 1. When the junction box is in the second state, the first mating part 31 of the pressure plate 3 engages with the second limiting part 123 of the plug-in part 12 to create a smaller gap between the pressure plate 3 and the base plate 4. At this time, the pressure plate 3 and the base plate 4 can clamp the cable 7 along the height direction of the junction box to achieve the fixation between the cable 7 and the box 1.

[0092] Therefore, when the junction box is in the first state, the pressure plate 3 and the box body 1 can be transported as a whole after being connected, so as to reduce transportation costs and shorten the assembly time between the two. Moreover, the pressure plate 3 and the base plate 4 can form an installation space to accommodate the cable 7. During the connection process between the cable 7 and the box body 1, it is beneficial to improve the assembly efficiency between the cable 7 and the box body 1. When the junction box is in the second state, the pressure plate 3 and the base plate 4 clamp the cable 7 along the height direction of the junction box, so as to improve the stability and reliability of the connection between the cable 7 and the box body 1, reduce the possibility of the cable 7 detaching from the box body 1, and further improve the stability of current transmission between the cable 7 and the socket 2, thereby ensuring the reliability of the junction box during operation.

[0093] In one specific implementation, such as Figure 5 and Figure 9 As shown, the first limiting part 122 includes a first guide surface 122a and a first mating surface 122b, the second limiting part 123 includes a second guide surface 123a and a second mating surface 123b, and the first mating part 31 includes a third guide surface 311 and a third mating surface 312.

[0094] like Figure 11 and Figure 12 As shown, along the width and height directions of the junction box, when the junction box is in the first state, the third mating surface 312 abuts against the first mating surface 122b, and the third guide surface 311 abuts against the second guide surface 123a. When the junction box is in the second state, the third mating surface 312 abuts against the second mating surface 123b.

[0095] In this embodiment of the application, during the connection process between the pressure plate 3 and the plug-in part 12, the pressure plate 3 can move towards the base plate 4 along the height direction of the junction box under the action of external force, so that the pressure plate 3 can be engaged with the first limiting part 122 and the second limiting part 123 in sequence.

[0096] During the engagement of the pressure plate 3 and the first limiting part 122, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the first guide surface 122a of the first limiting part 122. Then, as the external force gradually increases, the third guide surface 311 will continue to move along the first guide surface 122a toward the base plate 4 until the third guide surface 311 of the first mating part 31 abuts against the second guide surface 123a of the second limiting part 123, and then the external force is released so that the junction box is in the first state. At the same time, the third mating surface 312 of the first mating part 31 also abuts against the first mating surface 122b of the first limiting part 122.

[0097] At this time, the first limiting part 122 can restrict the pressure plate 3 to move upward along the height direction of the junction box through the first mating surface 122b, and the second limiting part 123 can restrict the pressure plate 3 to move downward along the height direction of the junction box through the second guide surface 123a, so as to realize the snap-fit ​​between the pressure plate 3 and the first limiting part 122.

[0098] In this first state, the pressure plate 3 is not easy to contact and cooperate with the first limiting part 122, so that the pressure plate 3 can be packaged and transported together with the box 1, which helps to reduce transportation costs. In addition, during the connection of the cable 7 and the box 1, the assembly time between the two can be shortened, thereby improving the assembly efficiency of the cable 7 and the box 1.

[0099] During the engagement of the pressure plate 3 and the second limiting part 123, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the second guide surface 123a of the second limiting part 123. Then, as the external force gradually increases, the third guide surface 311 will continue to move along the second guide surface 123a toward the base plate 4 until the third mating surface 312 of the first mating part 31 abuts against the second mating surface 123b of the second limiting part 123, and then the external force is released so that the junction box is in the second state.

[0100] At this time, the second limiting part 123 can restrict the upward movement of the pressure plate 3 along the height direction of the junction box through the second mating surface 123b, so as to realize the engagement between the pressure plate 3 and the second limiting part 123.

[0101] In this second state, the pressure plate 3 and the base plate 4 can clamp the cable 7 along the height direction of the junction box, so as to improve the stability and reliability of the connection between the cable 7 and the box 1, reduce the possibility of the cable 7 coming off the box 1, and further improve the stability of current transmission between the cable 7 and the socket 2, thereby ensuring the reliability of the junction box during operation.

[0102] In one possible implementation, along the width and height directions of the junction box, the first guide surface 122a, the second guide surface 123a, and the third guide surface 311 are all inclined surfaces, and along the direction from the pressure plate 3 toward the base plate 4, the inclined surfaces are inclined toward the edge of the junction box; or, the first guide surface 122a, the second guide surface 123a, and the third guide surface 311 are all curved surfaces, and along the direction from the pressure plate 3 toward the base plate 4, the curved surfaces are curved toward the center of the junction box; along the height direction of the junction box, the first mating surface 122b, the second mating surface 123b, and the third mating surface 312 are all L-shaped structures.

[0103] In one specific implementation, such as Figure 1 , Figure 5 , Figure 8 and Figure 9As shown, along the length of the junction box, the first limiting part 122 and the second limiting part 123 are arranged adjacent to each other, and the first mating part 31 also includes a first through hole 313, as shown. Figure 11 As shown, when the junction box is in the first state, the first limiting part 122 is located inside the first through hole 313, as... Figure 12 As shown, when the junction box is in the second state, the first limiting part 122 and the second limiting part 123 are both located in the first through hole 313 to restrict the movement of the pressure plate 3 relative to the plug-in part 12 along the length direction of the junction box.

[0104] In this embodiment of the application, during the connection process between the pressure plate 3 and the plug-in part 12, the pressure plate 3 can move towards the base plate 4 along the height direction of the junction box under the action of external force, so that the first limiting part 122 and the second limiting part 123 extend into the first through hole 313 in sequence, thereby restricting the movement of the pressure plate 3 relative to the plug-in part 12 along the length direction of the junction box.

[0105] Along the height direction of the junction box, the sidewall of the first through hole 313 near the base plate 4 is part of the aforementioned third mating surface 312.

[0106] During the process of the first limiting part 122 extending into the first through hole 313, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the first guide surface 122a of the first limiting part 122. Then, as the external force gradually increases, the third guide surface 311 will continue to move along the first guide surface 122a toward the base plate 4 until the third guide surface 311 of the first mating part 31 abuts against the second guide surface 123a of the second limiting part 123 and the external force is removed, so that the junction box is in the first state. At the same time, the third mating surface 312 of the first mating part 31 also abuts against the first mating surface 122b of the first limiting part 122.

[0107] At this time, at least a portion of the first limiting part 122 is located inside the first through hole 313. During the movement of the pressure plate 3 relative to the plug-in part 12 along the length direction of the junction box, the first limiting part 122 can abut against any side wall of the first through hole 313 along the length direction of the junction box, so as to restrict the movement of the pressure plate 3 along this direction by the first limiting part 122. This is beneficial to improve the stability and reliability of the connection between the pressure plate 3 and the box body 1 in the first state, reduce the possibility of the two separating from each other, and make the transportation process of the junction box more stable and reliable.

[0108] During the process of the second limiting part 123 extending into the first through hole 313, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the second guide surface 123a of the second limiting part 123. Then, as the external force gradually increases, the third guide surface 311 will continue to move along the second guide surface 123a toward the base plate 4 until the third mating surface 312 of the first mating part 31 abuts against the second mating surface 123b of the second limiting part 123, and then the external force is released so that the junction box is in the second state.

[0109] At this time, at least a portion of the second limiting part 123 and at least a portion of the first limiting part 122 are located inside the first through hole 313. During the movement of the pressure plate 3 relative to the plug-in part 12 along the length direction of the junction box, the first limiting part 122 and the second limiting part 123 can respectively abut against the two side walls of the first through hole 313 along the length direction of the junction box, so as to restrict the movement of the pressure plate 3 along this direction by the first limiting part 122 and the second limiting part 123. This is beneficial to improve the stability and reliability of the connection between the pressure plate 3 and the box body 1 in the second state, reduce the possibility of the two separating from each other, and improve the clamping effect of the pressure plate 3 and the bottom plate 4 on the cable 7.

[0110] In one possible implementation, along the height direction of the junction box, the first limiting part 122 can be connected to the side of the second limiting part 123 facing the pressure plate 3. When the junction box is in the second state, the first limiting part 122 and the second limiting part 123 simultaneously abut against the two side walls of the first through hole 313 along the length direction of the junction box to restrict the movement of the pressure plate 3 along the length direction of the junction box in the second state.

[0111] In one specific implementation, such as Figure 5 and Figure 8 As shown, the pressure plate 3 is also provided with a second mating part 32, and the plug-in part 12 is also provided with a first limiting groove 124. When the junction box is in the first state, at least a part of the second mating part 32 is located in the first limiting groove 124. When the junction box is in the second state, the second mating part 32 is located in the first limiting groove 124 and abuts against the bottom wall of the first limiting groove 124.

[0112] In this embodiment of the application, during the connection process between the pressure plate 3 and the plug-in part 12, the pressure plate 3 can move towards the base plate 4 along the height direction of the junction box under the action of external force, so that the second mating part 32 and the first limiting groove 124 are engaged, thereby restricting the movement of the pressure plate 3 relative to the plug-in part 12 along the length direction of the junction box.

[0113] Specifically, when the junction box is in either the first or second state, during the movement of the pressure plate 3 relative to the plug-in portion 12 along the length of the junction box, the second mating portion 32 can abut against the side wall of the first limiting groove 124 to restrict the movement of the pressure plate 3 along that direction. Along the height of the junction box, the second mating portion 32 and the first limiting groove 124 form a U-shaped structure. When the junction box is in the second state, the second mating portion 32 abuts against the bottom wall of the first limiting groove 124. The U-shaped structure also restricts the movement of the pressure plate 3 relative to the plug-in portion 12 along the width of the junction box, further reducing the possibility of them separating and improving the stability and reliability of the connection between the pressure plate 3 and the box body 1. Furthermore, the U-shaped pressure plate 3 is easier to process and better meets actual production needs.

[0114] In one specific implementation, such as Figure 2 , Figure 8 , Figure 9 and Figure 10 As shown, the pressure plate 3 is also provided with a pressing part 33, and the base plate 4 is provided with a third mating part 41. Along the height direction of the junction box, the projection of the pressing part 33 and the projection of the third mating part 41 overlap, and both the pressing part 33 and the third mating part 41 are arc-shaped structures.

[0115] In this embodiment, the pressing part 33 facilitates the user to press the pressure plate 3, causing the pressure plate 3 to move along the height direction of the junction box towards the base plate 4 under the action of external force, thereby placing the junction box in either the first or second state. By setting the projections of the pressing part 33 and the third mating part 41 to overlap, the pressing part 33 and the third mating part 41 can clamp the cable 7 along the height direction of the junction box, thus improving the locking effect of the junction box on the cable 7, thereby improving the stability of current transmission and the reliability of the junction box during operation. Simultaneously, by setting both the pressing part 33 and the third mating part 41 to be arc-shaped, they fit more closely to the outer surface of the cable 7, increasing the contact area between the pressing part 33 and the cable 7, and between the third mating part 41 and the cable 7. This improves the clamping effect of the junction box on the cable 7 and reduces damage to the cable 7, avoiding the risk of breakage of the internal conductors of the cable 7 due to excessive clamping force, thus ensuring the safety and reliability of the cable 7 during operation and extending its service life.

[0116] In one specific implementation, such as Figure 8 and Figure 9 As shown, along the width direction of the junction box, the first mating part 31 is connected to both ends of the pressing part 33, and the first mating part 31 can be elastically deformed.

[0117] In this embodiment, the first mating part 31 is connected to both ends of the pressing part 33 so that the first mating part 31 can elastically deform relative to the pressing part 33. In the process of connecting the pressure plate 3 and the plug-in part 12, the first mating part 31 can apply a rebound force inward along the width direction of the junction box to improve the locking effect between the first mating part 31 and the first limiting part 122 and the second limiting part 123 of the first mating part 31, thereby further improving the stability and reliability of the connection between the pressure plate 3 and the plug-in part 12.

[0118] During the engagement of the pressure plate 3 and the first limiting part 122, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the first guide surface 122a of the first limiting part 122. Then, as the external force gradually increases, the first mating part 31 will continue to move towards the base plate 4 along the first guide surface 122a. At the same time, the first mating part 31 will undergo elastic deformation, that is, the first mating part 31 will move outward relative to the pressing part 33 along the width direction of the junction box until the third guide surface 311 of the first mating part 31 and the first guide surface 122a of the first limiting part 122 separate from each other. At this time, under the action of the restoring force, the first mating part 31 will move inward relative to the pressing part 33 along the width direction of the junction box, so that the third mating surface 312 of the first mating part 31 abuts against the first mating surface 122b of the first limiting part 122, and the third guide surface 311 of the first mating part 31 abuts against the second guide surface 123a of the second limiting part 123 along the height direction of the junction box.

[0119] During the engagement of the pressure plate 3 and the second limiting part 123, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 will first abut against the second guide surface 123a of the second limiting part 123. Then, as the external force gradually increases, the first mating part 31 will continue to move along the second guide surface 123a toward the base plate 4. At the same time, the first mating part 31 will undergo elastic deformation, that is, the first mating part 31 will move outward relative to the pressing part 33 along the width direction of the junction box until the third guide surface 311 of the first mating part 31 and the second guide surface 123a of the second limiting part 123 separate from each other. At this time, under the action of the restoring force, the first mating part 31 will move inward relative to the pressing part 33 along the width direction of the junction box, so that the third mating surface 312 of the first mating part 31 abuts against the second mating surface 123b of the second limiting part 123, and the third guide surface 311 of the first mating part 31 abuts against the base plate 4 of the plug-in part 12 along the height direction of the junction box.

[0120] In one specific implementation, such as Figure 9 and Figure 10As shown, the pressing part 33 is provided with a plurality of first protrusions 331, and the third mating part 41 is provided with a plurality of second protrusions 411. The plurality of first protrusions 331 and the plurality of second protrusions 411 are all distributed at intervals along the width direction of the junction box, and the surfaces of the first protrusions 331 and the second protrusions 411 that contact the cable 7 are both arc surfaces or planes.

[0121] In this embodiment, along the height direction of the junction box, the first protrusion 331 protrudes relative to the pressing part 33 towards the base plate 4, and the second protrusion 411 protrudes relative to the third mating part 41 towards the pressure plate 3. This allows the pressure plate 3 and the base plate 4 to clamp the cable 7 via the first protrusion 331 and the second protrusion 411 when the junction box is in the second state. This increases the pressure applied to the cable 7 by both, thereby improving the locking effect of the junction box on the cable 7, ensuring the stability of current transmission, and improving the reliability of the junction box during operation. Specifically, along the height direction of the junction box, the projection of the first protrusion 331 overlaps with the projection of the second protrusion 411, so that the pressure applied to the cable 7 by both is at the same position, which further enhances the hijacking effect on the cable 7. Meanwhile, by setting the surfaces of the first protrusion 331 and the second protrusion 411 that come into contact with the cable 7 to be arc surfaces or flat surfaces, it is beneficial to reduce the damage to the outer surface of the cable 7 caused by both, so as to avoid the risk of the outer surface of the cable 7 cracking due to excessive clamping force, thereby ensuring the safety and reliability of the cable 7 during operation, and thus helping to improve the service life of the cable 7.

[0122] In one specific implementation, such as Figure 6 , Figure 7 and Figure 10 As shown, the second receiving cavity 121 includes a first cavity 121a and a second cavity 121b that are connected to each other. Along the length of the junction box, the first cavity 121a is located on the side of the second cavity 121b that is close to the first receiving cavity 111. At least a portion of the plug sleeve 2 is located in the first cavity 121a. One of the side walls of the plug sleeve 2 and the first cavity 121a is provided with a second limiting groove 121a1, and the other is provided with a third protrusion 21. The second limiting groove 121a1 and the third protrusion 21 are engaged.

[0123] In this embodiment, along the length of the junction box, the first receiving cavity 111 can communicate with the second cavity 121b through the first cavity 121a. The first receiving cavity 111 is used to accommodate the diode 6, the first cavity 121a is used to accommodate the socket 2, and the second cavity 121b is used to accommodate the cable 7. During the connection of the cable 7 to the box 1, at least a portion of the cable 7 extends from the second cavity 121b into the first cavity 121a and connects with the socket 2. At least a portion of the socket 2 can extend into the first receiving cavity 111 and connect with the diode 6 to achieve current transmission. Specifically, during the connection of the socket 2 to the box 1, the two can engage with the second limiting groove 121a1 through the third protrusion 21 to restrict the movement of the socket 2 relative to the box 1 along the length of the junction box, improving the stability and reliability of the connection between the two, thereby further ensuring the stability of current transmission between the socket 2, the diode 6, and the cable 7.

[0124] In one specific implementation, such as Figure 6 and Figure 10 As shown, along the height direction of the junction box, the plug-in part 12 has a first opening 125 on the side facing the base plate 4. The base plate 4 is also provided with a fourth mating part 42, which blocks the first opening 125 and forms a first cavity 121a with the plug-in part 12. The fourth mating part 42 is provided with a second limiting groove 121a1 or a third protrusion 21.

[0125] In this embodiment, the base plate 4 is provided with a second limiting groove 121a1 or a third protrusion 21 that cooperates with the insert 2. During the assembly of the base plate 4 and the box 1, the base plate 4 can engage with the insert 2 so that the base plate 4 and the box 1 together restrict the movement of the insert 2, thereby fixing the insert 2 in the first cavity 121a to complete the installation of the insert 2.

[0126] Along the height direction of the junction box, the plug part 12 is provided with a first opening 125 on the side facing the base plate 4. During the assembly of the plug sleeve 2 and the box body 1, the plug sleeve 2 can be placed in the first cavity 121a through the first opening 125 and engage with the inner wall of the first cavity 121a so that the plug sleeve 2 and the box body 1 can complete the initial installation.

[0127] Along the height direction of the junction box, the base plate 4 is provided with a fourth mating part 42, and the side of the fourth mating part 42 facing the box body 1 is provided with a second limiting groove 121a1 or a third protrusion 21 that mates with the plug sleeve 2. During the assembly of the base plate 4 and the box body 1, the fourth mating part 42 can extend into the first opening 125 of the plug-in part 12 and engage with the side of the plug sleeve 2 facing the first opening 125, so that while the fourth mating part 42 blocks the first opening 125, it can clamp the plug sleeve 2 with the box body 1 along the height direction of the junction box, thereby fixing the plug sleeve 2 in the first cavity 121a, so that the plug sleeve 2 and the box body 1 are finally installed.

[0128] Therefore, in this embodiment, by separating the box body 1 from the base plate 4, and providing a second limiting groove 121a1 and / or a third protrusion 21 on the inner wall of the first cavity 121a and the fourth mating part 42, the process of installing the insert 2 is more convenient, and the structure of the box body 1 is simplified, the processing difficulty of the first cavity 121a is reduced, so as to improve the production efficiency of each component.

[0129] In one specific embodiment, the inner wall of the first cavity 121a and the fourth mating part 42 are provided with a second limiting groove 121a1, and the outer wall of the plug sleeve 2 is provided with a third protrusion 21. The third protrusion 21 can be an annular structure extending circumferentially along the plug sleeve 2, thereby eliminating the need to adjust the installation angle of the plug sleeve 2 during the assembly process with the box body 1, thus shortening the assembly time between components and improving the assembly efficiency of the junction box.

[0130] In one specific embodiment, during the assembly of the insert 2 and the housing 1, at least a portion of the insert 2 can extend into the first receiving cavity 111 and be soldered to the diode 6, so as to achieve initial fixation of the insert 2 between the mounting base plates 4, thereby reducing the possibility of the insert 2 shaking during the assembly of the base plate 4 and the plug-in part 12, which is beneficial to improving the assembly efficiency between the base plate 4 and the housing 1.

[0131] In one specific embodiment, the base plate 4 and the plug-in part 12 are fixedly connected by welding to improve the sealing of the first cavity 121a, reduce the possibility of water vapor entering the first cavity 121a, thereby ensuring the stability of the current during transmission and improving the safety and reliability of the junction box during operation.

[0132] In one specific implementation, such as Figure 3 and Figure 6 As shown, along the length of the junction box, there is a third limiting part 126 between the first cavity 121a and the second cavity 121b, and the third limiting part 126 protrudes relative to the inner wall of the second receiving cavity 121.

[0133] The cable 7 includes a plug 71, which has a fifth mating part 711. The fifth mating part 711 is inclined relative to the plug 71 and can be elastically deformed. When the plug 71 is connected to the socket 2, the fifth mating part 711 abuts against the side wall of the third limiting part 126 on the side facing the first cavity 121a.

[0134] In this embodiment of the application, the cable 7 includes a plug 71 and a cable 72 connected together. During the process of connecting the cable 7 to the box 1, along the length direction of the junction box, the cable 7 first extends into the second cavity 121b of the plug part 12, and then moves from the second cavity 121b toward the first cavity 121a.

[0135] During the movement of the cable 7, since the second receiving cavity 121 is provided with a third limiting part 126 that protrudes relative to the inner wall, when the fifth mating part 711 abuts against the third limiting part 126, the fifth mating part 711 can move inward along the radial direction of the cable 7 under the action of external force, so that the plug 71 can be inserted into the first cavity 121a and connected to the socket 2.

[0136] Simultaneously, when the fifth mating part 711 contacts and abuts against the third limiting part 126, the fifth mating part 711 moves outward along the radial direction of the cable 7 under the action of the restoring force, so that the fifth mating part 711 is tilted relative to the plug 71. At this time, if the cable 7 moves from the first cavity 121a towards the second cavity 121b along the length direction of the junction box, the fifth mating part 711 can abut against the side wall of the third limiting part 126 on the side facing the first cavity 121a, thereby restricting the movement of the cable 7 in that direction, thereby reducing the possibility of the two separating from each other and improving the stability and reliability of the connection between the cable 7 and the box 1.

[0137] The third limiting part 126 can be a ring structure so that the third limiting part 126 can abut against the fifth mating part 711 in the circumference of the cable 7, thereby making it impossible for the plug 71 to easily detach from the first cavity 121a.

[0138] Alternatively, there may be multiple third limiting parts 126, and the multiple third limiting parts 126 are spaced apart in the second receiving cavity 121 along the circumference of the cable 7, so that the fifth mating part 711 can move along the length direction of the junction box through the gap between two adjacent third limiting parts 126, thereby realizing a detachable connection between the cable 7 and the box 1, so that the cable 7 can be replaced in the event of aging, failure, or severe damage, without having to disassemble the junction box, thereby helping to reduce the maintenance cost of the junction box.

[0139] In one possible implementation, the socket 2 is further provided with a retaining member (not shown in the figure) for fixing the plug 71. Along the length of the junction box, the inner diameter of the middle part of the retaining member is smaller than the inner diameter of its two ends, that is, the middle part of the retaining member is used to fix and limit the plug 71.

[0140] In one specific implementation, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the plug-in portion 12 is also provided with an extension section 127. Along the length direction of the junction box, the extension section 127 extends relative to the plug-in portion 12 toward the side away from the main body portion 11. The extension section 127 is provided with a second through hole 127a. The cable 7 extends into the second receiving cavity 121 through the second through hole 127a and connects with the socket 2.

[0141] The junction box also includes a seal 5, a portion of which is fitted onto the outer wall of the extension 127, and another portion of which is interference-fitted with the cable 7.

[0142] In this embodiment, by providing an extension section 127 on the side of the plug portion 12 away from the main body portion 11, the length of the second cavity 121b can be increased, expanding the contact area between the second cavity 121b and the cable 72, thereby further improving the stability and reliability of the connection between the cable 7 and the housing 1. Simultaneously, the extension section 127 allows the connection point between the plug 71 and the cable 72 to be located in the middle region of the second receiving cavity 121, extending the clamping point of the junction box on the cable 72 and enabling the housing 1 to protect the connection point between the plug 71 and the cable 72, reducing the possibility of breakage due to bending or other factors, and thus extending the service life of the cable 7.

[0143] The sealing element 5 is sleeved on the outer peripheral wall of the extension section 127, and at least a portion of the sealing element 5 extends outward relative to the extension section 127 along the length direction of the junction box, so that at least a portion of the sealing element 5 can wrap the cable 72, so that the two are interference fit, thereby improving the sealing performance between the sealing element 5 and the cable 72, reducing the possibility of moisture entering the box 1 through the second through hole 127a, improving the waterproof performance of the junction box, and ensuring the stability and reliability of the junction box during operation.

[0144] In addition, since the pressure plate 3 has a U-shaped structure, when the junction box is in the second state, a space can be formed between the pressure plate 3 and the base plate 4 to accommodate the seal 5. Under the pressure of the pressure plate 3 and the base plate 4, the seal 5 and the cable 72 fit more tightly, which helps to further improve the sealing performance at the junction box entrance.

[0145] A wiring method using a junction box as described in any of the above claims to fix a cable 7 inside the junction box. The wiring method includes: installing a sleeve 2 inside a plug-in portion 12 and soldering it to a diode 6; soldering a base plate 4 to the plug-in portion 12; engaging a pressure plate 3 with a first limiting portion 122, placing the junction box in a first state; inserting the cable 7 into the plug-in portion 12 and engaging it with the sleeve 2; engaging the pressure plate 3 with a second limiting portion 123, placing the junction box in a second state, with the pressure plate 3 and the base plate 4 clamping the cable 7.

[0146] In this embodiment, one end of the socket 2 is soldered to the diode 6, and the other end is snapped into the cable 7, so that the cable 7 can be electrically connected to the diode 6 through the socket 2, which helps to improve the stability of current transmission among the three.

[0147] Meanwhile, the base plate 4 is welded to the plug-in part 12 after the plug sleeve 2 is installed inside the plug-in part 12, so as to seal the plug sleeve 2 inside the plug-in part 12, thereby reducing the possibility of moisture affecting the plug sleeve 2 and the cable 7, which helps to improve the reliability of the junction box during operation.

[0148] In addition, the pressure plate 3 is provided with a first mating part 31, and the plug-in part 12 is provided with a first limiting part 122 and a second limiting part 123. Along the height direction of the junction box, the first limiting part 122 is located on the side of the second limiting part 123 facing the pressure plate 3. During the connection between the pressure plate 3 and the plug-in part 12, the pressure plate 3 can move towards the base plate 4 along the height direction of the junction box under the action of external force, so that the pressure plate 3 can sequentially engage with the first limiting part 122 and the second limiting part 123, thereby enabling the pressure plate 3 and the base plate 4 to clamp the cable 7 along the height direction of the junction box.

[0149] Specifically, when the pressure plate 3 engages with the first limiting part 122, the junction box is in a first state. At this time, along the height direction of the junction box, the third guide surface 311 of the first mating part 31 abuts against the second guide surface 123a of the second limiting part 123, and the third mating surface 312 of the first mating part 31 abuts against the first mating surface 122b of the first limiting part 122. The first limiting part 122 can restrict the upward movement of the pressure plate 3 along the height direction of the junction box via the first mating surface 122b, and the second limiting part 123 can restrict the downward movement of the pressure plate 3 along the height direction of the junction box via the second guide surface 123a. In this first state, the pressure plate 3 is less likely to contact and engage with the first limiting part 122, allowing the pressure plate 3 to be packaged and transported together with the box body 1, which helps reduce transportation costs. Furthermore, during the connection process between the cable 7 and the box body 1, the assembly time between them can be shortened, thereby improving the assembly efficiency of the cable 7 and the box body 1.

[0150] Specifically, when the pressure plate 3 engages with the second limiting part 123, the junction box is in its second state. At this time, along the height direction of the junction box, the third mating surface 312 of the first mating part 31 abuts against the second mating surface 123b of the second limiting part 123. The second limiting part 123 can restrict the upward movement of the pressure plate 3 along the height direction of the junction box via the second mating surface 123b. In this second state, the pressure plate 3 and the base plate 4 can clamp the cable 7 along the height direction of the junction box, thereby improving the stability and reliability of the connection between the cable 7 and the box body 1, reducing the possibility of the cable 7 detaching from the box body 1, and further improving the stability of current transmission between the cable 7 and the socket 2, thus ensuring the reliability of the junction box during operation.

[0151] In one specific embodiment, the second receiving cavity 121 is provided with a second limiting groove 121a1, the insert 2 is provided with a third protrusion 21, and the base plate 4 is provided with a second limiting groove 121a1. When the insert 2 is installed in the plug-in part 12, the wiring method further includes: installing the insert 2 in the plug-in part 12 and positioning the third protrusion 21 in the second limiting groove 121a1; when the base plate 4 is welded to the plug-in part 12, the wiring method further includes: engaging the second limiting groove 121a1 with the third protrusion 21.

[0152] In this embodiment, during the connection between the sleeve 2 and the housing 1, the sleeve 2 can engage with the second limiting groove 121a1 of the housing 1 through the third protrusion 21, so that the sleeve 2 and the housing 1 can be initially installed. During the assembly of the base plate 4 and the housing 1, the base plate 4 can engage with the third protrusion 21 of the sleeve 2 through the second limiting groove 121a1, so that the base plate 4 and the housing 1 can jointly restrict the movement of the sleeve 2, thereby fixing the sleeve 2 in the first cavity 121a to complete the installation of the sleeve 2. This is beneficial to improving the installation reliability of the sleeve 2, thereby further ensuring the stability of current transmission between the sleeve 2, the diode 6 and the cable 7.

[0153] In one specific embodiment, the plug-in portion 12 is provided with an extension section 127, and the junction box also includes a sealing element 5. When the base plate 4 is welded to the plug-in portion 12, the wiring method further includes: fitting the sealing element 5 onto the outer wall of the extension section 127, and along the height direction of the junction box, the sealing element 5 is located within the projection range of the pressure plate 3 and the base plate 4.

[0154] In this embodiment, the extension section 127 can lengthen the second cavity 121b and increase the contact area between the second cavity 121b and the cable 72, so as to further improve the stability and reliability of the connection between the cable 7 and the box 1, and make the connection between the plug 71 and the cable 72 located in the middle area of ​​the second receiving cavity 121, so as to extend the clamping point of the junction box on the cable 72, so that the box 1 can protect the connection between the two, reduce the possibility of breakage due to bending and other factors, and help extend the service life of the cable 7.

[0155] When the seal 5 is fitted onto the outer wall of the extension section 127, at least a portion of the seal 5 can wrap around the cable 72 to create an interference fit, thereby improving the sealing performance between the seal 5 and the cable 72, reducing the possibility of moisture entering the box 1 through the second through hole 127a, and improving the waterproof performance of the junction box to ensure its stability and reliability during operation. Furthermore, since a space for accommodating the seal 5 can be formed between the pressure plate 3 and the base plate 4, the seal 5 fits more tightly with the cable 72 under the pressure of the pressure plate 3 and the base plate 4, further improving the sealing performance at the junction box inlet.

[0156] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this application. The above description is only a preferred embodiment of this application, but this application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of this application, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, should be within the protection scope of this application.

Claims

1. A junction box, characterized in that, The junction box includes: The housing (1) includes a connected body part (11) and a plug-in part (12). The body part (11) has a first receiving cavity (111) for receiving a diode (6). The plug-in part (12) has a second receiving cavity (121) for receiving a cable (7). The socket (2) is located in the second receiving cavity (121), and one end of the socket (2) is connected to the cable (7), and the other end of the socket (2) extends into the first receiving cavity (111) and is connected to the diode (6); The pressure plate (3) and the base plate (4) are connected to both sides of the plug-in part (12) along the height direction of the junction box, and the pressure plate (3) can move relative to the plug-in part (12) along the height direction of the junction box. The pressure plate (3) is provided with a first mating part (31), and the first mating part (31) further includes a first through hole (313). The plug-in part (12) is provided with a first limiting part (122) and a second limiting part (123). Along the height direction of the junction box, the first limiting part (122) is located on the side of the second limiting part (123) facing the pressure plate (3), and along the length direction of the junction box, the first limiting part (122) and the second limiting part (123) are arranged adjacent to each other. When the junction box is in the first state, the first limiting part (122) is located in the first through hole (313), and the first mating part (31) is engaged with the first limiting part (122). When the junction box is in the second state, the first limiting part (122) and the second limiting part (123) are both located in the first through hole (313), and the first mating part (31) is engaged with the second limiting part (123) to restrict the movement of the pressure plate (3) relative to the plug-in part (12) along the length direction of the junction box.

2. The junction box according to claim 1, characterized in that, The first limiting part (122) includes a first guide surface (122a) and a first mating surface (122b), the second limiting part (123) includes a second guide surface (123a) and a second mating surface (123b), and the first mating part (31) includes a third guide surface (311) and a third mating surface (312). Along the width and height directions of the junction box, when the junction box is in the first state, the third mating surface (312) abuts against the first mating surface (122b), and the third guide surface (311) abuts against the second guide surface (123a). When the junction box is in the second state, the third mating surface (312) abuts against the second mating surface (123b).

3. The junction box according to claim 1, characterized in that, The pressure plate (3) is also provided with a second mating part (32), and the plug-in part (12) is also provided with a first limiting groove (124). When the junction box is in the first state, at least part of the second mating part (32) is located in the first limiting groove (124). When the junction box is in the second state, the second mating part (32) is located in the first limiting groove (124) and abuts against the bottom wall of the first limiting groove (124).

4. The junction box according to claim 1, characterized in that, The pressure plate (3) is also provided with a pressing part (33), and the bottom plate (4) is provided with a third mating part (41). Along the height direction of the junction box, the projection of the pressing part (33) and the projection of the third mating part (41) overlap, and both the pressing part (33) and the third mating part (41) are arc-shaped structures.

5. The junction box according to claim 4, characterized in that, The pressing part (33) is provided with a plurality of first protrusions (331), and the third mating part (41) is provided with a plurality of second protrusions (411). The plurality of first protrusions (331) and the plurality of second protrusions (411) are distributed at intervals along the width direction of the junction box, and the surfaces of the first protrusions (331) and the second protrusions (411) that are in contact with the cable (7) are both arc surfaces or planes.

6. The junction box according to any one of claims 1-5, characterized in that, The second receiving cavity (121) includes a first cavity (121a) and a second cavity (121b) that are connected to each other. Along the length of the junction box, the first cavity (121a) is located on the side of the second cavity (121b) close to the first receiving cavity (111), and at least a portion of the plug (2) is located in the first cavity (121a). One of the sidewalls of the sleeve (2) and the first cavity (121a) is provided with a second limiting groove (121a1), and the other is provided with a third protrusion (21). The second limiting groove (121a1) and the third protrusion (21) are engaged.

7. The junction box according to claim 6, characterized in that, Along the height direction of the junction box, the plug-in part (12) has a first opening (125) on the side facing the base plate (4). The base plate (4) is also provided with a fourth mating part (42). The fourth mating part (42) blocks the first opening (125) and forms the first cavity (121a) with the plug-in part (12). The fourth mating part (42) is provided with a second limiting groove (121a1) or the third protrusion (21).

8. A wiring method, using a junction box as described in any one of claims 1-7 for wiring, for fixing the cable (7) inside the junction box, characterized in that, The wiring method includes: The socket (2) is installed in the plug part (12) and soldered to the diode (6); The base plate (4) is welded to the insertion part (12); When the pressure plate (3) is engaged with the first limiting part (122), the junction box is in the first state; Insert the cable (7) into the plug part (12) and engage it with the plug sleeve (2); When the pressure plate (3) is engaged with the second limiting part (123), the junction box is in the second state, and the pressure plate (3) and the base plate (4) clamp the cable (7).

9. The wiring method according to claim 8, characterized in that, The second receiving cavity (121) is provided with a second limiting groove (121a1), and the plug sleeve (2) is provided with a third protrusion (21). When the plug sleeve (2) is installed in the plug-in part (12), the wiring method further includes: Install the sleeve (2) into the plug part (12) and position the third protrusion (21) in the second limiting groove (121a1); The base plate (4) is provided with the second limiting groove (121a1). When the base plate (4) is welded to the plug-in part (12), the wiring method further includes: The second limiting groove (121a1) is engaged with the third protrusion (21).

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