Junction box and wiring method

Abstract

The invention discloses a junction box and a wiring method. The junction box comprises a box body, a plug bush, a pressing plate and a bottom plate. The box body comprises a body part and a plugging part which are communicated with each other, the body part is provided with a diode, the plugging part is provided with a cable, and the diode is electrically connected with the cable through a plug bush so as to realize current transmission; the pressing plate and the bottom plate are connected to two sides of the plugging part along the height direction of the junction box, and the pressing plate can move along the direction relative to the plugging part. Wherein the pressing plate is provided with a first matching part, the inserting part is provided with a first limiting part and a second limiting part, the first limiting part is located on the side, facing the pressing plate, of the second limiting part in the height direction of the junction box, and when the first matching part is clamped and matched with the first limiting part, the pressing plate and the box body can be transported as a whole after being connected; and when the first matching part is clamped and matched with the second limiting part, the cable is clamped by the pressing plate and the bottom plate, so that the stability and the reliability of the connection between the cable and the box body are improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic junction boxes, and in particular to a junction box and a wiring method. Background Art

[0002] With the rapid development of the photovoltaic industry, the application of water photovoltaic systems is becoming more and more extensive. In the existing water photovoltaic systems, the electrical connection between two adjacent photovoltaic modules is mainly achieved through junction boxes, cables and connectors. Specifically, the junction box is installed on the backlight surface of the photovoltaic module, and the connector includes a positive connector and a negative connector. In the process of electrical connection between two adjacent photovoltaic modules, the junction box of one photovoltaic module is plugged and matched with the negative connector of the junction box of another photovoltaic module through the positive connector, and the two matched connectors are fixed to the back of the photovoltaic module through cable ties, so as to avoid contact with water while realizing current transmission between modules. In the process of operation of the photovoltaic module, the connector is easy to fall off from the photovoltaic module under the action of wind and waves, so that it is in a suspended state, resulting in low reliability of the electrical connection between two adjacent photovoltaic modules, and even the risk of falling into the water, which has a great safety hazard. Summary of the invention

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

[0004] The present application provides a junction box, which comprises a box body, a plug sleeve, a pressure plate and a bottom plate. The box body comprises a main body and a plug-in part which are connected, the main body having a first accommodating cavity, the first accommodating cavity being used to accommodate a diode, the plug-in part having a second accommodating cavity, the second accommodating cavity being used to accommodate a cable; the plug sleeve is located in the second accommodating cavity, one end of the plug sleeve is connected to the cable, the other end of the plug sleeve extends into the first accommodating cavity and is connected to the diode; the pressure plate and the bottom plate are connected to both sides of the plug-in part along the height direction of the junction box, and the pressure plate can move relative to the plug-in part along the height direction of the junction box; wherein the pressure plate is provided with a first matching part, 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, and when the junction box is in the first state, the first matching part is engaged with the first limiting part, and when the junction box is in the second state, the first matching part is engaged with the second limiting part.

[0005] In the embodiment of the present application, a plug-in portion connected to the main body is provided on the box body, so that the cable can be inserted into the box body and connected to the socket, that is, the connection position of the two is transferred 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, which can prevent the two from being in a suspended state and reduce the possibility of shaking or even falling into the water under the action of wind and waves, which is beneficial to improving 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 transmission of current more stable, and thus ensuring the reliability of the photovoltaic module during operation.

[0006] During the process of connecting the cable and the box body, when the junction box is in the first state, the first matching portion of the pressure plate and the first limiting portion of the plug-in portion are snap-fitted to allow a larger spacing between the pressure plate and the bottom plate. At this time, the cable can extend into the second accommodating cavity of the plug-in portion and cooperate with the socket to achieve the connection between the cable and the box body; when the junction box is in the second state, the first matching portion of the pressure plate and the second limiting portion of the plug-in portion are snap-fitted to allow a smaller spacing between the pressure plate and the bottom plate. At this time, the pressure plate and the bottom plate can clamp the cable along the height direction of the junction box to achieve fixation between the cable and the box body.

[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 being connected, so as to reduce transportation costs and shorten the assembly time between the two. In addition, an installation space for accommodating the cable can be formed between the pressure plate and the bottom plate, which is beneficial to improving the assembly efficiency between the cable and the box body during the connection process of the cable; when the junction box is in the second state, the pressure plate and the bottom 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 help to 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 a possible implementation, the first limiting portion includes a first guide surface and a first matching surface, the second limiting portion includes a second guide surface and a second matching surface, and the first matching portion includes a third guide surface and a third matching 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 a possible embodiment, the first limiting portion and the second limiting portion are adjacent to each other along the length direction of the junction box, and the first matching 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, and when the junction box is in a second state, the first limiting portion and the second limiting portion are both located in the first through hole to limit the movement of the pressure plate relative to the plug-in portion along the length direction of the junction box.

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

[0012] In a possible implementation, the pressure plate is further provided with a pressing portion, and the bottom plate is provided with a third matching portion, along the height direction of the junction box, the projection of the pressing portion and the projection of the third matching portion overlap, and the pressing portion and the third matching portion are both arc-shaped structures.

[0013] In a possible embodiment, the pressing portion is provided with a plurality of first protrusions, and the third mating portion is provided with a plurality of second protrusions, the plurality of first protrusions and the plurality of second protrusions are spaced apart along the width direction of the junction box, and the surfaces of the first protrusions and the second protrusions in contact with the cable are both arc surfaces or plane surfaces.

[0014] In a possible implementation, the second accommodating cavity includes a first cavity and a second cavity that are connected, and along the length direction of the junction box, the first cavity is located on a side of the second cavity close to the first accommodating cavity, and at least a portion of the socket is located in the first cavity.

[0015] One of the insert sleeve and the side wall of the first cavity is provided with a second limiting groove, and the other is provided with a third protruding portion, and the second limiting groove is snap-fitted with the third protruding portion.

[0016] In a possible embodiment, along the height direction of the junction box, the plug-in portion has a first opening on one side facing the base plate, and the base plate is also provided with a fourth matching portion, which blocks the first opening and forms the first cavity together with the plug-in portion, and the fourth matching portion is provided with the second limiting groove or the third protrusion.

[0017] The present application also provides a wiring method, which uses any of the above-mentioned junction boxes for wiring, and is used to fix the cable in the junction box. The wiring method includes:

[0018] Install the socket in the plug-in part and weld it to the diode; weld the bottom plate to the plug-in part; clamp the pressure plate to the first limiting part, and the junction box is in the first state; insert the cable into the plug-in part and clamp it to the socket; clamp the pressure plate to the second limiting part, and the junction box is in the second state, and the pressure plate and the bottom plate clamp the cable.

[0019] In the embodiment of the present application, one end of the socket is welded to the diode, and the other end is clamped to the cable, so that the cable can be electrically connected to the diode through the socket, which is beneficial to improving the stability of current transmission between the three. At the same time, the bottom plate is welded to the plug-in part after the socket is installed in the plug-in part, which is used to seal the socket in the plug-in part to reduce the possibility of water vapor affecting the socket and the cable, which is beneficial to improving the reliability of the junction box during operation.

[0020] In addition, the pressing plate is provided with a first matching portion, the plug-in portion is provided with a first limiting portion and a second limiting portion, and along the height direction of the junction box, the first limiting portion is located on the side of the second limiting portion facing the pressing plate. During the connection between the pressing plate and the plug-in portion, the pressing plate can move along the height direction of the junction box toward the bottom plate under the action of an external force, so that the pressing plate is engaged with the first limiting portion and the second limiting portion in sequence, so that the pressing plate can clamp the cable with the bottom plate along the height direction of the junction box.

[0021] When the pressure plate is engaged with the first limiting portion, the junction box is in the first state. At this time, along the height direction of the junction box, the third guide surface of the first matching portion abuts against the second guide surface of the second limiting portion, and the third matching surface of the first matching portion abuts against the first matching surface of the first limiting portion. The first limiting portion can limit the upward movement of the pressure plate along the height direction of the junction box through the first matching surface, and the second limiting portion can limit the downward movement of the pressure plate along the height direction of the junction box through the second guiding surface. In this first state, the pressure plate is not easy to contact and cooperate with the first limiting portion, so that the pressure plate can be packaged and transported together with the box body, which is conducive to reducing transportation costs, and in the process of connecting the cable and the box body, it can shorten the assembly time between the two, thereby improving the assembly efficiency of the cable and the box body.

[0022] When the pressure plate is engaged with the second limiting portion, the junction box is in the second state, at which time, along the height direction of the junction box, the third mating surface of the first mating portion abuts against the second mating surface of the second limiting portion. The second limiting portion can limit the upward movement of the pressure plate along the height direction of the junction box through the second mating surface. In this second state, the pressure plate and the bottom plate can 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 help to further improve the stability of the current transmission between the cable and the socket, thereby ensuring the reliability of the junction box during operation.

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

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

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0028] Figure 2 yes Figure 1 A cross-sectional view of

[0029] Figure 3 yes Figure 1 Exploded diagram of

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

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

[0032] Figure 6 yes Figure 4 A cross-sectional view of

[0033] Figure 7 is a schematic structural diagram of the socket provided in the present application in one embodiment;

[0034] Figure 8 is a schematic structural diagram of a pressing plate provided in the present application in one embodiment;

[0035] Fig. 9 yes Figure 8 A cross-sectional view of

[0036] Fig.10 is a schematic structural diagram of a base plate provided in the present application in an embodiment;

[0037] Fig.11 is a schematic structural diagram of the junction box provided in the present application when it is in a first state;

[0038] Fig.12 It is a structural schematic diagram of the junction box provided in the present application when it is in the second state.

[0039] Description of reference numerals:

[0040] 1-Box body;

[0041] 11-Body part;

[0042] 111- first accommodating chamber;

[0043] 112-cover plate;

[0044] 12-plug-in portion;

[0045] 121 - second accommodating chamber;

[0046] 121a-first cavity;

[0047] 121a1- second limiting groove;

[0048] 121b-second cavity;

[0049] 122- first limiting portion;

[0050] 122a-first guide surface;

[0051] 122b-first mating surface;

[0052] 123- second limiting portion;

[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 section;

[0059] 127a-second through hole;

[0060] 2- plug sleeve;

[0061] 21- third protrusion;

[0062] 3-Pressing plate;

[0063] 31- first matching portion;

[0064] 311- third guide surface;

[0065] 312-third mating surface;

[0066] 313-first through hole;

[0067] 32- second matching portion;

[0068] 33-pressing part;

[0069] 331- first protrusion;

[0070] 4- bottom plate;

[0071] 41- third matching portion;

[0072] 411- second protrusion;

[0073] 42- fourth matching part;

[0074] 5- Seal;

[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 constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0081] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0082] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0083] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0084] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0085] The embodiment of the present application provides a junction box for a photovoltaic module, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the junction box includes a box body 1, a socket 2, a pressure plate 3 and a bottom plate 4. The box body 1 includes a main body portion 11 and a plug-in portion 12 which are connected. The main body portion 11 has a first accommodating cavity 111, and the first accommodating cavity 111 is used to accommodate the diode 6. The plug-in portion 12 has a second accommodating cavity 121, and the second accommodating cavity 121 is used to accommodate the cable 7. The socket 2 is located in the second accommodating 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 accommodating cavity 111 and is connected to the diode 6. The pressure plate 3 and the bottom plate 4 are connected to both sides of the plug-in portion 12 along the height direction of the junction box, and the pressure plate 3 can move relative to the plug-in portion 12 along the height direction of the junction box.

[0086] In the embodiment of the present application, a plug-in portion 12 connected to the main body 11 is provided on the box body 1, so that the cable 7 can be inserted into the box body 1 and connected with the socket 2, that is, the connection position of the two is transferred from the outside of the junction box to the inside of the junction box, so that the box body 1 can fix and seal the connection between the cable 7 and the socket 2, which can prevent the two from being in a suspended state and reduce the possibility of shaking or even falling into the water under the action of wind and waves, which 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 transmission of current more stable, and thus ensuring the reliability of the photovoltaic module during operation.

[0087] Among them, the main body 11 and the plug-in part 12 can be an integrally formed structure, which is beneficial to improving the overall structural strength of the box body 1 and reducing the possibility of separation between the main body 11 and the plug-in part 12. No conductive parts are required between the main body 11 and the plug-in part 12, which is beneficial to simplify the structure of the junction box and reduce the volume of the junction box, thereby achieving the purpose of lightweighting while reducing the production cost of the junction box.

[0088] At the same time, 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 beneficial to further improve the effect of current transmission.

[0089] In addition, the first accommodating cavity 111 also has a second opening (not marked in the figure), and the diode 6 is installed in the first accommodating cavity 111 through the second opening, and the main body 11 also includes a cover plate 112, and the cover plate 112 is used to block the second opening so that the first accommodating cavity 111 is in a sealed state, reducing the possibility of water vapor entering the first accommodating 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 pressing plate 3 is provided with a first matching portion 31, and the plug-in portion 12 is provided with a first limiting portion 122 and a second limiting portion 123. Along the height direction of the junction box, the first limiting portion 122 is located on the side of the second limiting portion 123 facing the pressing plate 3, and when the junction box is in the first state, the first matching portion 31 is engaged with the first limiting portion 122, and when the junction box is in the second state, the first matching portion 31 is engaged with the second limiting portion 123.

[0091] Specifically, during the process of connecting the cable 7 with the box body 1, when the junction box is in the first state, the first matching portion 31 of the pressure plate 3 is snap-fitted with the first limiting portion 122 of the plug-in portion 12 so that there is a larger spacing between the pressure plate 3 and the bottom plate 4. At this time, the cable 7 can extend into the second accommodating cavity 121 of the plug-in portion 12 and cooperate with the socket 2 to achieve the connection between the cable 7 and the box body 1; when the junction box is in the second state, the first matching portion 31 of the pressure plate 3 is snap-fitted with the second limiting portion 123 of the plug-in portion 12 so that there is a smaller spacing between the pressure plate 3 and the bottom plate 4. At this time, the pressure plate 3 and the bottom plate 4 can clamp the cable 7 along the height direction of the junction box to achieve fixation between the cable 7 and the box body 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. An installation space for accommodating the cable 7 can be formed between the pressure plate 3 and the bottom plate 4, which is beneficial to improving the assembly efficiency between the cable 7 and the box body 1 during the connection process of the cable 7; when the junction box is in the second state, the pressure plate 3 and the bottom plate 4 clamp the cable 7 along the height direction of the junction box 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 help to 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 a specific embodiment, Figure 5 and Fig. 9 As shown, the first limiting portion 122 includes a first guide surface 122a and a first matching surface 122b, the second limiting portion 123 includes a second guide surface 123a and a second matching surface 123b, and the first matching portion 31 includes a third guide surface 311 and a third matching surface 312.

[0094] like Fig.11 and Fig.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 the embodiment of the present application, during the connection between the pressure plate 3 and the plug-in portion 12, the pressure plate 3 can move along the height direction of the junction box toward the bottom plate 4 under the action of external force, so that the pressure plate 3 is engaged with the first limit portion 122 and the second limit portion 123 in sequence.

[0096] During the process of the clamping engagement between the pressure plate 3 and the first limiting portion 122, along the height direction of the junction box, the third guide surface 311 of the first matching portion 31 will first abut against the first guide surface 122a of the first limiting portion 122, and then as the external force gradually increases, the third guide surface 311 will continue to move along the first guide surface 122a toward the bottom plate 4 until the third guide surface 311 of the first matching portion 31 abuts against the second guide surface 123a of the second limiting portion 123 and the external force is removed to put the junction box in the first state. At the same time, the third matching surface 312 of the first matching portion 31 also abuts against the first matching surface 122b of the first limiting portion 122.

[0097] At this time, the first limiting portion 122 can limit the upward movement of the pressure plate 3 along the height direction of the junction box through the first mating surface 122b, and the second limiting portion 123 can limit the downward movement of the pressure plate 3 along the height direction of the junction box through the second guide surface 123a, so as to achieve the clamping connection between the pressure plate 3 and the first limiting portion 122.

[0098] In the first state, the pressing plate 3 is not easy to contact and cooperate with the first limiting portion 122, so that the pressing plate 3 can be packaged and transported together with the box body 1, which is beneficial to reducing transportation costs. In the process of connecting the cable 7 and the box body 1, the assembly time between the two can be shortened, thereby improving the assembly efficiency of the cable 7 and the box body 1.

[0099] During the process of the clamping engagement between the pressure plate 3 and the second limiting portion 123, along the height direction of the junction box, the third guide surface 311 of the first matching portion 31 will first abut against the second guide surface 123a of the second limiting portion 123, and then as the external force gradually increases, the third guide surface 311 will continue to move along the second guide surface 123a toward the bottom plate 4 until the third matching surface 312 of the first matching portion 31 abuts against the second matching surface 123b of the second limiting portion 123, and then the external force is removed to put the junction box in the second state.

[0100] At this time, the second limiting portion 123 can limit the upward movement of the pressing plate 3 along the height direction of the junction box through the second matching surface 123 b, so as to achieve the clamping connection between the pressing plate 3 and the second limiting portion 123 .

[0101] In the second state, the pressing plate 3 and the bottom plate 4 can clamp the cable 7 along the height direction of the junction box to improve the stability and reliability of the connection between the cable 7 and the box body 1, and reduce the possibility of the cable 7 detaching from the box body 1, which is beneficial to 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 a possible embodiment, 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 of the pressure plate 3 toward the bottom 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 of the pressure plate 3 toward the bottom plate 4, the curved surfaces are bent 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 a specific embodiment, Figure 1 , Figure 5 , Figure 8 and Fig. 9As shown, along the length direction of the junction box, the first limiting portion 122 and the second limiting portion 123 are adjacently arranged, and the first matching portion 31 further includes a first through hole 313, such as Fig.11 As shown, when the junction box is in the first state, the first limiting portion 122 is located in the first through hole 313, as shown in FIG. Fig.12 As shown, when the junction box is in the second state, the first limiting portion 122 and the second limiting portion 123 are both located in the first through hole 313 to limit the movement of the pressing plate 3 relative to the plug-in portion 12 along the length direction of the junction box.

[0104] In the embodiment of the present application, during the connection between the pressing plate 3 and the plug-in portion 12, the pressing plate 3 can move along the height direction of the junction box toward the bottom plate 4 under the action of external force, so that the first limiting portion 122 and the second limiting portion 123 extend into the first through hole 313 in sequence to limit the movement of the pressing plate 3 relative to the plug-in portion 12 along the length direction of the junction box.

[0105] In which, along the height direction of the junction box, the side wall of the first through hole 313 close to the bottom plate 4 is a part of the third matching surface 312 .

[0106] When the first limiting portion 122 extends into the first through hole 313, along the height direction of the junction box, the third guide surface 311 of the first matching portion 31 will first abut against the first guide surface 122a of the first limiting portion 122, and then as the external force gradually increases, the third guide surface 311 will continue to move along the first guide surface 122a toward the bottom plate 4 until the third guide surface 311 of the first matching portion 31 abuts against the second guide surface 123a of the second limiting portion 123, and then the external force is removed to put the junction box in the first state, and at the same time, the third matching surface 312 of the first matching portion 31 also abuts against the first matching surface 122b of the first limiting portion 122.

[0107] At this time, at least a portion of the first limiting portion 122 is located in the first through hole 313. When the pressing plate 3 moves relative to the plug-in portion 12 along the length direction of the junction box, the first limiting portion 122 can abut against any side wall of the first through hole 313 along the length direction of the junction box to achieve the restriction of the movement of the pressing plate 3 along this direction by the first limiting portion 122. This is beneficial to improving the stability and reliability of the connection between the pressing plate 3 and the box body 1 in the first state, and reducing the possibility of the two being detached from each other, so that the transportation process of the junction box is more stable and reliable.

[0108] When the second limiting portion 123 extends into the first through hole 313, along the height direction of the junction box, the third guide surface 311 of the first matching portion 31 will first abut against the second guide surface 123a of the second limiting portion 123, and then as the external force gradually increases, the third guide surface 311 will continue to move along the second guide surface 123a toward the bottom plate 4 until the third matching surface 312 of the first matching portion 31 abuts against the second matching surface 123b of the second limiting portion 123 and the external force is removed, so that the junction box is in the second state.

[0109] At this time, at least part of the second limiting portion 123 and at least part of the first limiting portion 122 are both located in the first through hole 313. When the pressing plate 3 moves relative to the plug-in portion 12 along the length direction of the junction box, the first limiting portion 122 and the second limiting portion 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 limit the movement of the pressing plate 3 along this direction by the first limiting portion 122 and the second limiting portion 123. This is beneficial to improving the stability and reliability of the connection between the pressing plate 3 and the box body 1 in the second state, and reducing the possibility of the two being detached from each other, so that the clamping effect of the pressing plate 3 and the bottom plate 4 on the cable 7 is improved.

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

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

[0112] In the embodiment of the present application, during the connection between the pressure plate 3 and the plug-in portion 12, the pressure plate 3 can move along the height direction of the junction box toward the bottom plate 4 under the action of external force, so that the second matching portion 32 is engaged with the first limiting groove 124, thereby limiting the movement of the pressure plate 3 relative to the plug-in portion 12 along the length direction of the junction box.

[0113] Specifically, when the junction box is in the first state or the second state, during the movement of the pressing plate 3 relative to the plug-in portion 12 along the length direction of the junction box, the second matching portion 32 can abut against the side wall of the first limiting groove 124, so as to achieve the restriction of the movement of the pressing plate 3 along this direction by the second matching portion 32. In the height direction of the junction box, the second matching portion 32 and the first limiting groove 124 are mutually matched U-shaped structures. When the junction box is in the second state, the second matching portion 32 can abut against the bottom wall of the first limiting groove 124, and the design of the U-shaped structure can also limit the movement of the pressing plate 3 relative to the plug-in portion 12 along the width direction of the junction box, so as to further reduce the possibility of the two being separated from each other, improve the stability and reliability of the connection between the pressing plate 3 and the box body 1, and the pressing plate 3 with a U-shaped structure is easy to process and more in line with actual production needs.

[0114] In a specific embodiment, Figure 2 , Figure 8 , Fig. 9 and Fig.10 As shown, the pressing plate 3 is also provided with a pressing portion 33, and the bottom plate 4 is provided with a third matching portion 41. Along the height direction of the junction box, the projection of the pressing portion 33 and the projection of the third matching portion 41 overlap, and the pressing portion 33 and the third matching portion 41 are both arc-shaped structures.

[0115] In the embodiment of the present application, the pressing portion 33 facilitates the user to press the pressing plate 3, so that the pressing plate 3 moves in the direction of the bottom plate 4 along the height direction of the junction box along the line of action of the external force, so that the junction box is in the first state or the second state. Among them, by setting the projection of the pressing portion 33 and the projection of the third matching portion 41 to overlap, the pressing portion 33 and the third matching portion 41 can clamp the cable 7 along the height direction of the junction box, which is conducive to improving the locking effect of the junction box on the cable 7, thereby improving the stability of current transmission and improving the reliability of the junction box during operation. At the same time, by setting the pressing portion 33 and the third matching portion 41 to be both arc-shaped structures, the two are more closely attached to the outer surface of the cable 7, which is conducive to increasing the contact area between the pressing portion 33 and the cable 7, and the third matching portion 41 and the cable 7, which is conducive to improving the clamping effect of the junction box on the cable 7, and reducing the damage to the cable 7, so as to avoid the risk of the internal wire of the cable 7 being broken 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.

[0116] In a specific embodiment, Figure 8 and Fig. 9 As shown, along the width direction of the junction box, the first matching portion 31 is connected to both ends of the pressing portion 33, and the first matching portion 31 can be elastically deformed.

[0117] In the embodiment of the present application, the first matching portion 31 is connected to the two ends of the pressing portion 33 so that the first matching portion 31 can be elastically deformed relative to the pressing portion 33, so that during the connection between the pressure plate 3 and the plug-in portion 12, the first matching portion 31 can apply a rebound force inward along the width direction of the junction box to improve the clamping effect between the first matching portion 31 and the first limiting portion 122 and the second limiting portion 123 of the first matching portion 31, thereby further improving the stability and reliability of the connection between the pressure plate 3 and the plug-in portion 12.

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

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

[0120] In a specific embodiment, Fig. 9 and Fig.10As shown, the pressing portion 33 is provided with a plurality of first protrusions 331, and the third matching portion 41 is provided with a plurality of second protrusions 411. The plurality of first protrusions 331 and the plurality of second protrusions 411 are spaced apart along the width direction of the junction box, and the surfaces where the first protrusions 331 and the second protrusions 411 contact with the cable 7 are both arc surfaces or plane surfaces.

[0121] In the embodiment of the present application, along the height direction of the junction box, the first protrusion 331 protrudes relative to the pressing portion 33 toward the bottom plate 4, and the second protrusion 411 protrudes relative to the third matching portion 41 toward the pressing plate 3, so that when the junction box is in the second state, the pressing plate 3 and the bottom plate 4 can clamp the cable 7 through the first protrusion 331 and the second protrusion 411, thereby increasing the pressure applied by the two to the cable 7, and further increasing the locking effect of the junction box on the cable 7, so as to ensure the stability of current transmission and improve 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 by the two to the cable 7 is at the same position, which is conducive to further improving the hijacking effect on the cable 7. At the same time, by setting the surfaces where the first protrusion 331 and the second protrusion 411 contact the cable 7 to be curved surfaces or flat surfaces, it is beneficial to reduce the damage caused to the outer surface of the cable 7 by the two, so as to avoid the risk of the outer surface of the cable 7 being broken due to excessive clamping force, thereby ensuring the safety and reliability of the cable 7 during operation, and further helping to increase the service life of the cable 7.

[0122] In a specific embodiment, Figure 6 , Figure 7 and Fig.10 As shown, the second accommodating cavity 121 includes a first cavity 121a and a second cavity 121b that are connected. Along the length direction of the junction box, the first cavity 121a is located on a side of the second cavity 121b close to the first accommodating cavity 111, and at least part of the socket 2 is located in the first cavity 121a, and one of the side walls of the socket 2 and the first cavity 121a is provided with a second limiting groove 121a1, and the other is provided with a third protrusion 21, and the second limiting groove 121a1 is snap-fitted with the third protrusion 21.

[0123] In the embodiment of the present application, along the length direction of the junction box, the first accommodating cavity 111 can be connected to the second cavity 121b through the first cavity 121a, wherein the first accommodating 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. In the process of connecting the cable 7 to the box body 1, at least part of the cable 7 extends from the second cavity 121b into the first cavity 121a and connects with the socket 2, and at least part of the socket 2 can extend into the first accommodating cavity 111 and connect with the diode 6 to achieve current transmission. Specifically, in the process of connecting the socket 2 to the box body 1, the third protrusion 21 can be engaged with the second limiting groove 121a1 to limit the movement of the socket 2 relative to the box body 1 along the length direction of the junction box, thereby 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 a specific embodiment, Figure 6 and Fig.10 As shown, along the height direction of the junction box, the plug-in portion 12 has a first opening 125 on one side facing the bottom plate 4, and the bottom plate 4 is also provided with a fourth matching portion 42, which blocks the first opening 125 and forms a first cavity 121a with the plug-in portion 12, and the fourth matching portion 42 is provided with a second limiting groove 121a1 or a third protrusion 21.

[0125] In the embodiment of the present application, the bottom plate 4 is provided with a second limiting groove 121a1 or a third protrusion 21 cooperating with the socket 2. During the assembly process of the bottom plate 4 and the box body 1, the bottom plate 4 can be snap-fitted with the socket 2 so that the bottom plate 4 and the box body 1 jointly limit the movement of the socket 2, thereby fixing the socket 2 in the first cavity 121a to complete the installation of the socket 2.

[0126] Along the height direction of the junction box, a first opening 125 is provided on one side of the plug-in portion 12 facing the bottom plate 4. During the assembly of the socket 2 and the box body 1, the socket 2 can be placed in the first cavity 121a through the first opening 125 and snap-fit ​​with the inner wall of the first cavity 121a to complete the preliminary installation between the socket 2 and the box body 1.

[0127] Along the height direction of the junction box, the bottom plate 4 is provided with a fourth matching portion 42, and the side of the fourth matching portion 42 facing the box body 1 is provided with a second limiting groove 121a1 or a third protrusion 21 matching with the socket 2. During the assembly process of the bottom plate 4 and the box body 1, the fourth matching portion 42 can extend into the first opening 125 of the plug-in portion 12, and be snap-fitted with the side of the socket 2 facing the first opening 125, so that the fourth matching portion 42 can block the first opening 125 while clamping the socket 2 with the box body 1 in the height direction of the junction box, thereby fixing the socket 2 in the first cavity 121a, so that the final installation between the socket 2 and the box body 1 is completed.

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

[0129] In a specific embodiment, the inner wall of the first cavity 121a and the fourth matching portion 42 are provided with a second limiting groove 121a1, and the outer side wall of the plug sleeve 2 is provided with a third protrusion 21. The third protrusion 21 may be an annular structure extending along the circumference of the plug sleeve 2, so that during the assembly of the plug sleeve 2 and the box body 1, there is no need to adjust the installation angle of the plug sleeve 2, thereby shortening the assembly time between the components and improving the assembly efficiency of the junction box.

[0130] In a specific embodiment, during the assembly of the socket 2 and the box body 1, at least a portion of the socket 2 can extend into the first accommodating cavity 111 and be welded to the diode 6, so as to achieve preliminary fixation of the socket 2 between the mounting base plate 4, thereby reducing the possibility of shaking of the socket 2 during the assembly of the base plate 4 and the plug-in portion 12, which is beneficial to improving the assembly efficiency between the base plate 4 and the box body 1.

[0131] In a specific embodiment, the base plate 4 and the plug-in portion 12 are fixedly connected by welding to improve the sealing of the first cavity 121a and 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 a specific embodiment, Figure 3 and Figure 6 As shown, along the length direction of the junction box, a third limiting portion 126 is provided between the first cavity 121 a and the second cavity 121 b , and the third limiting portion 126 protrudes relative to the inner wall of the second accommodating cavity 121 .

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

[0134] In the embodiment of the present application, the cable 7 includes a connected plug 71 and a cable 72. During the connection between the cable 7 and the box body 1, the cable 7 first extends into the second cavity 121b of the plug-in part 12 along the length direction of the junction box, and then moves from the second cavity 121b toward the first cavity 121a.

[0135] During the movement of the cable 7, since the second accommodating cavity 121 is provided with a third limiting portion 126 protruding relative to the inner wall, when the fifth matching portion 711 abuts against the third limiting portion 126, the fifth matching portion 711 can move radially inward along the cable 7 under the action of external force, so that the plug 71 can extend into the first cavity 121a and connect with the socket 2.

[0136] At the same time, when the fifth mating portion 711 contacts and abuts against the third limiting portion 126, the fifth mating portion 711 moves radially outward along the cable 7 under the action of the restoring force, so that the fifth mating portion 711 is inclined relative to the plug 71. At this time, if the cable 7 moves from the first cavity 121a toward the second cavity 121b along the length direction of the junction box, the fifth mating portion 711 can abut against the side wall of the third limiting portion 126 toward the first cavity 121a to limit the movement of the cable 7 along this direction, thereby reducing the possibility of the two being detached from each other and improving the stability and reliability of the connection between the cable 7 and the box body 1.

[0137] The third limiting portion 126 may be an annular structure, so that the third limiting portion 126 can abut against the fifth matching portion 711 along the circumference of the cable 7, thereby preventing the plug 71 from easily escaping from the first cavity 121a.

[0138] Alternatively, there may be a plurality of third limiting portions 126, and the plurality of third limiting portions 126 are spaced apart in the second accommodating cavity 121 along the circumference of the cable 7, so that the fifth mating portion 711 can move along the length direction of the junction box through the gap between two adjacent third limiting portions 126, thereby realizing a detachable connection between the cable 7 and the box body 1, so that the cable 7 can be replaced when it is aged, fails, or is severely damaged, without the need to disassemble the junction box, which helps to reduce the maintenance cost of the junction box.

[0139] In a possible embodiment, a clamping member (not shown in the figure) for fixing the plug 71 is also provided inside the socket 2. Along the length direction of the junction box, the inner diameter of the middle part of the clamping member is smaller than the inner diameter of the two ends thereof, that is, the middle part of the clamping member is used to fix and limit the plug 71.

[0140] In a specific embodiment, 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 a 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 accommodating cavity 121 through the second through hole 127a and is connected to the socket 2.

[0141] The junction box further comprises a sealing member 5 , a portion of which is sleeved on the outer wall of the extension section 127 , and another portion of the sealing member 5 is interference fit with the cable 7 .

[0142] In the embodiment of the present application, by providing an extension section 127 on the side of the plug-in portion 12 away from the main body 11, the length of the second cavity 121b can be lengthened, and the contact area between the second cavity 121b and the cable 72 can be expanded, so as to further improve the stability and reliability of the connection between the cable 7 and the box body 1. At the same time, the provision of the extension section 127 enables the connection between the plug 71 and the cable 72 to be located in the middle area of ​​the second accommodating cavity 121, so as to extend the clamping point of the junction box on the cable 72, and enable the box body 1 to protect the connection between the plug 71 and the cable 72, reduce the possibility of its breakage due to factors such as bending, and help to extend the service life of the cable 7.

[0143] Among them, the seal 5 is sleeved on the outer peripheral wall of the extension section 127, and at least a portion of the seal 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 seal 5 can wrap the cable 72, so that the two are interference fit, thereby improving the sealing between the seal 5 and the cable 72, reducing the possibility of water vapor passing through the second through hole 127a and then into the box body 1, 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 is a U-shaped structure, when the junction box is in the second state, a space for accommodating the seal 5 can be formed between the pressure plate 3 and the bottom plate 4, and under the squeezing of the pressure plate 3 and the bottom plate 4, the seal 5 and the cable 72 fit more closely, which is beneficial to further improve the sealing of the junction box entrance.

[0145] A wiring method, using any of the above-mentioned junction boxes for wiring, for fixing a cable 7 in the junction box, the wiring method comprising: installing the socket 2 in the plug-in portion 12 and welding it to the diode 6; welding the bottom plate 4 to the plug-in portion 12; clamping the pressure plate 3 with the first limit portion 122, and the junction box is in a first state; inserting the cable 7 into the plug-in portion 12 and clamping it to the socket 2; clamping the pressure plate 3 with the second limit portion 123, and the junction box is in a second state, and the pressure plate 3 and the bottom plate 4 clamp the cable 7.

[0146] In the embodiment of the present application, one end of the socket 2 is welded to the diode 6, and the other end is clamped to the cable 7, so that the cable 7 can be electrically connected to the diode 6 through the socket 2, which is beneficial to improving the stability of current transmission between the three.

[0147] At the same time, the bottom plate 4 is welded to the plug-in part 12 after the socket 2 is installed in the plug-in part 12, which is used to seal the socket 2 in the plug-in part 12 to reduce the possibility of water vapor affecting the socket 2 and the cable 7, which is beneficial to improving the reliability of the junction box during operation.

[0148] In addition, the pressing plate 3 is provided with a first matching portion 31, and the plug-in portion 12 is provided with a first limiting portion 122 and a second limiting portion 123, and along the height direction of the junction box, the first limiting portion 122 is located on the side of the second limiting portion 123 facing the pressing plate 3. In the process of connecting the pressing plate 3 with the plug-in portion 12, the pressing plate 3 can move along the height direction of the junction box toward the direction of the bottom plate 4 under the action of an external force, so that the pressing plate 3 is engaged with the first limiting portion 122 and the second limiting portion 123 in sequence, so that the pressing plate 3 can clamp the cable 7 with the bottom plate 4 along the height direction of the junction box.

[0149] Specifically, when the pressing plate 3 is engaged with the first limiting portion 122, the junction box is in the first state. At this time, along the height direction of the junction box, the third guide surface 311 of the first matching portion 31 abuts against the second guide surface 123a of the second limiting portion 123, and the third matching surface 312 of the first matching portion 31 abuts against the first matching surface 122b of the first limiting portion 122. Among them, the first limiting portion 122 can limit the upward movement of the pressing plate 3 along the height direction of the junction box through the first matching surface 122b, and the second limiting portion 123 can limit the downward movement of the pressing plate 3 along the height direction of the junction box through the second guiding surface 123a. In this first state, the pressing plate 3 is not easy to contact and cooperate with the first limiting portion 122, so that the pressing plate 3 can be packaged and transported together with the box body 1, which is conducive to reducing transportation costs, and in the process of connecting the cable 7 and the box body 1, the assembly time between the two can be shortened, thereby improving the assembly efficiency of the cable 7 and the box body 1.

[0150] Specifically, when the pressing plate 3 is engaged with the second limiting portion 123, the junction box is in the second state. At this time, along the height direction of the junction box, the third mating surface 312 of the first mating portion 31 abuts against the second mating surface 123b of the second limiting portion 123. The second limiting portion 123 can limit the upward movement of the pressing plate 3 along the height direction of the junction box through the second mating surface 123b. In the second state, the pressing plate 3 and the bottom plate 4 can clamp the cable 7 along the height direction of the junction box 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 help to further improve the stability of the current transmission between the cable 7 and the socket 2, thereby ensuring the reliability of the junction box during operation.

[0151] In a specific embodiment, the second accommodating cavity 121 is provided with a second limiting groove 121a1, the plug sleeve 2 is provided with a third protrusion 21, and the bottom plate 4 is provided with a second limiting groove 121a1. When the plug sleeve 2 is installed in the plug-in portion 12, the wiring method further includes: installing the plug sleeve 2 in the plug-in portion 12, and making the third protrusion 21 located in the second limiting groove 121a1; when the bottom plate 4 and the plug-in portion 12 are welded, the wiring method further includes: engaging the second limiting groove 121a1 with the third protrusion 21.

[0152] In the embodiment of the present application, during the process of connecting the socket 2 with the box body 1, the socket 2 can be snap-fitted with the second limiting groove 121a1 of the box body 1 through the third protrusion 21, so that the initial installation between the socket 2 and the box body 1 is completed. During the process of assembling the bottom plate 4 with the box body 1, the bottom plate 4 can be snap-fitted with the third protrusion 21 of the socket 2 through the second limiting groove 121a1, so that the bottom plate 4 and the box body 1 jointly limit the movement of the socket 2, thereby fixing the socket 2 in the first cavity 121a to complete the installation of the socket 2, which is beneficial to improving the installation reliability of the socket 2, thereby further ensuring the stability of current transmission between the socket 2, the diode 6 and the cable 7.

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

[0154] In the embodiment of the present application, the extension section 127 can lengthen the length of the second cavity 121b and expand 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 body 1, and enable the connection between the plug 71 and the cable 72 to be located in the middle area of ​​the second accommodating cavity 121, so as to extend the clamping point of the junction box on the cable 72, so that the box body 1 can protect the connection between the two, reduce the possibility of breakage due to factors such as bending, and help to extend the service life of the cable 7.

[0155] When the seal 5 is sleeved on the outer wall of the extension section 127, at least part of the seal 5 can wrap the cable 72 so that the two are interference fit, thereby improving the sealing between the seal 5 and the cable 72, reducing the possibility of water vapor passing through the second through hole 127a and then entering the box body 1, improving the waterproof performance of the junction box, and ensuring the stability and reliability of the junction box during operation. And because a space for accommodating the seal 5 can be formed between the pressing plate 3 and the bottom plate 4, under the extrusion of the pressing plate 3 and the bottom plate 4, the seal 5 and the cable 72 fit more closely, which is conducive to further improving the sealing at the entrance of the junction box.

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

Claims

1. A junction box, characterized in that: The junction box comprises: A box body (1), the box body (1) comprising a main body portion (11) and a plug-in portion (12) which are connected to each other, the main body portion (11) having a first accommodating cavity (111), the first accommodating cavity (111) being used to accommodate a diode (6), the plug-in portion (12) having a second accommodating cavity (121), the second accommodating cavity (121) being used to accommodate a cable (7); A socket (2), the socket (2) being located in the second accommodating cavity (121), one end of the socket (2) being connected to the cable (7), and the other end of the socket (2) extending into the first accommodating cavity (111) and connected to the diode (6); A pressing plate (3) and a bottom plate (4), wherein the pressing plate (3) and the bottom plate (4) are connected to two sides of the plug-in portion (12) along the height direction of the junction box, and the pressing plate (3) is movable relative to the plug-in portion (12) along the height direction of the junction box; The pressure plate (3) is provided with a first matching portion (31), and the plug-in portion (12) is provided with a first limiting portion (122) and a second limiting portion (123); along the height direction of the junction box, the first limiting portion (122) is located on the side of the second limiting portion (123) facing the pressure plate (3); and when the junction box is in a first state, the first matching portion (31) is snap-fitted with the first limiting portion (122); and when the junction box is in a second state, the first matching portion (31) is snap-fitted with the second limiting portion (123).

2. The junction box according to claim 1, characterized in that: The first limiting portion (122) comprises a first guiding surface (122a) and a first matching surface (122b), the second limiting portion (123) comprises a second guiding surface (123a) and a second matching surface (123b), and the first matching portion (31) comprises a third guiding surface (311) and a third matching surface (312); Along the width and height directions of the junction box, when the junction box is in a 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 a 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: Along the length direction of the junction box, the first limiting portion (122) and the second limiting portion (123) are arranged adjacent to each other, and the first matching portion (31) also includes a first through hole (313). When the junction box is in a first state, the first limiting portion (122) is located in the first through hole (313); when the junction box is in a second state, the first limiting portion (122) and the second limiting portion (123) are both located in the first through hole (313) to limit the movement of the pressing plate (3) relative to the plug-in portion (12) along the length direction of the junction box.

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

5. The junction box according to claim 1, characterized in that: The pressing plate (3) is further provided with a pressing portion (33), and the bottom plate (4) is provided with a third matching portion (41); along the height direction of the junction box, the projection of the pressing portion (33) and the projection of the third matching portion (41) overlap, and the pressing portion (33) and the third matching portion (41) are both arc-shaped structures.

6. The junction box according to claim 5, characterized in that: The pressing portion (33) is provided with a plurality of first protrusions (331), and the third matching portion (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) in contact with the cable (7) are both arc surfaces or plane surfaces.

7. The junction box according to any one of claims 1 to 6, characterized in that: The second accommodating cavity (121) comprises a first cavity (121a) and a second cavity (121b) which are connected to each other; along the length direction of the junction box, the first cavity (121a) is located on a side of the second cavity (121b) close to the first accommodating cavity (111); and at least a portion of the socket (2) is located in the first cavity (121a); One of the plug sleeve (2) and the side wall of the first cavity (121a) is provided with a second limiting groove (121a1), and the other is provided with a third protruding portion (21), and the second limiting groove (121a1) is snap-fitted with the third protruding portion (21).

8. The junction box according to claim 7, characterized in that: Along the height direction of the junction box, the plug-in portion (12) has a first opening (125) on one side facing the bottom plate (4), and the bottom plate (4) is further provided with a fourth matching portion (42), the fourth matching portion (42) blocks the first opening (125) and forms the first cavity (121a) together with the plug-in portion (12), and the fourth matching portion (42) is provided with the second limiting groove (121a1) or the third protruding portion (21).

9. A wiring method, using a junction box as claimed in any one of claims 1 to 8 for wiring, for fixing a cable (7) in the junction box, characterized in that: The wiring method comprises: The socket (2) is installed in the plug-in portion (12) and welded to the diode (6); Welding the bottom plate (4) and the plug-in portion (12); The pressing plate (3) is clamped with the first limiting portion (122), and the junction box is in a first state; Inserting the cable (7) into the plug-in portion (12) and engaging it with the plug sleeve (2); The pressing plate (3) is clamped with the second limiting portion (123), the junction box is in the second state, and the pressing plate (3) and the bottom plate (4) clamp the cable (7).

10. The wiring method according to claim 9, characterized in that: The second accommodating cavity (121) is provided with a second limiting groove (121a1), and the plug sleeve (2) is provided with a third protruding portion (21). When the plug sleeve (2) is installed in the plug-in portion (12), the wiring method further comprises: Installing the insert sleeve (2) in the inserting portion (12), and positioning the third protruding portion (21) in the second limiting groove (121a1); The bottom plate (4) is provided with the second limiting groove (121a1), and when the bottom plate (4) and the plug-in portion (12) are welded, the wiring method further comprises: The second limiting groove (121a1) is snap-fitted with the third protruding portion (21).

Images