Junction box and photovoltaic module

Abstract

The utility model relates to a junction box and a photovoltaic module. The junction box comprises a box body, a box cover and a switch mechanism, the box body is provided with a containing cavity with an opening, the box cover has a closed state for closing the opening and an open state for opening the opening, the switch mechanism comprises a rotary knob and a connecting rod assembly, the rotary knob is rotatably arranged on the outer wall of the box body, and the connecting rod assembly is arranged on the outer wall of the box body. The connecting rod assembly is arranged in the containing cavity, the connecting rod assembly is connected with the rotary knob and the box cover, and the connecting rod assembly can drive the box cover to be switched between the closed state and the open state under driving of the rotary knob. According to the junction box and the photovoltaic module, the box cover can be opened or closed without a tool, the operation is more convenient, and the box cover is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and in particular to junction boxes and photovoltaic modules. Background Technology

[0002] Junction boxes are important components in photovoltaic modules. They are used to connect to the busbars inside the photovoltaic module to conduct the current inside the photovoltaic module and eventually connect it to the power grid.

[0003] A typical junction box consists of a body, a cover, and electronic components housed within the box. In related technologies, the body and cover are designed as separate units, connected by latches and snap-fit ​​mechanisms. However, when a junction box malfunctions and needs to be opened for repair, external tools are required to pry open the latches and open the cover. This process is cumbersome, can easily deform the junction box, and the cover is prone to being lost after removal, rendering the junction box unusable. Utility Model Content

[0004] Therefore, it is necessary to provide a junction box and photovoltaic module to address the problem that junction box covers are inconvenient to install and remove and are easily damaged.

[0005] In a first aspect, this application provides a junction box, comprising:

[0006] The box body has an open cavity;

[0007] A box lid, the box lid having a closed state that closes the opening and an open state that opens the opening;

[0008] A switching mechanism includes a knob and a linkage assembly. The knob is rotatably disposed on the outer wall of the housing, and the linkage assembly is disposed in the cavity. The linkage assembly connects the knob and the housing lid, and the linkage assembly can drive the housing lid to switch between a closed state and an open state under the drive of the knob.

[0009] The technical solution will be further explained below:

[0010] In one embodiment, the track includes:

[0011] The first track includes a vertical section and an arc section. The vertical section extends along the thickness direction of the junction box, and the bottom end of the arc section is connected to the top end of the vertical section. The top end of the arc section extends upward along an arc trajectory. The second rotating shaft is movably inserted in the first track. When the box cover is in the closed state, the second rotating shaft is located in the vertical section, and when the box cover is in the open state, the second rotating shaft is located in the arc section.

[0012] The second track extends along the thickness direction of the junction box and is located above the vertical section. The bottom end of the second track is connected to the top end of the vertical section, and the top end of the second track coincides with the center of the arc trajectory. The distance from the top end to the bottom end of the second track is equal to the distance from the second pivot to the third pivot. When the box cover is in the closed state, the third pivot is located at the bottom end of the second track, and when the box cover is in the open state, the third pivot is located at the top end of the second track.

[0013] In one embodiment, the top end of the arc segment is flush with the top end of the second track in the thickness direction of the junction box.

[0014] In one embodiment, the movable arm includes a main body segment, a first connecting segment, and a second connecting segment. The first connecting segment is connected at an angle to one end of the main body segment, and the second connecting segment is connected at an angle to the other end of the main body segment. The first connecting segment and the second connecting segment extend in opposite directions. The end of the first connecting segment away from the main body segment is rotatably connected to a second rotating shaft, and the end of the second connecting segment away from the main body segment is fixedly connected to the lid. The third rotating shaft is disposed at the connection between the first connecting segment and the main body segment.

[0015] In one embodiment, the linkage assembly includes two movable arms and two guide rails. The two guide rails are respectively disposed on two opposite cavity walls of the cavity. The movable arms and the guide rails are disposed in a one-to-one correspondence. The second rotating shaft connects the two movable arms, and the two ends of the second rotating shaft are respectively inserted into the tracks of the two guide rails to enable the two movable arms to move synchronously.

[0016] In one embodiment, the junction box further includes a partition plate disposed in the cavity, the partition plate dividing the cavity into a first cavity and a second cavity, the first cavity being used to house electronic components and the second cavity being used to house the linkage assembly.

[0017] In one embodiment, the cavity wall is provided with a first fitting portion, and the edge of the lid is provided with a second fitting portion. When the lid is in the closed state, the first fitting portion and the second fitting portion engage with each other.

[0018] In one embodiment, one of the first fitting portion and the second fitting portion includes a first groove and two first protrusions, the two first protrusions being respectively disposed on both sides of the first groove. The other of the first fitting portion and the second fitting portion includes a second protrusion and two second grooves, the two second grooves being respectively disposed on both sides of the second protrusion. When the lid is in the closed state, the first protrusion is fitted into the second groove, and the second protrusion is fitted into the first groove.

[0019] Secondly, this application also provides a photovoltaic module, including the aforementioned junction box.

[0020] In the aforementioned junction box and photovoltaic module, a knob is rotated externally on the box body, and a connecting rod assembly is installed inside the box cavity. The connecting rod assembly connects the knob to the box cover, and can switch the box cover between a closed and open state under the drive of the knob. Thus, when maintenance is required inside the junction box, rotating the knob drives the connecting rod assembly to open the box cover, allowing for maintenance through the opening. After maintenance, rotating the knob in the opposite direction closes the box cover. Compared to traditional junction boxes that require external tools to open or close the cover, the junction box of this application can be opened or closed without tools, saving material costs and making operation more convenient. It also prevents cover deformation and damage. Furthermore, even after the cover is opened, it remains connected to the box body via the connecting rod assembly, preventing the cover from being easily lost. Closing the cover also eliminates the need to distinguish between the front and back, further simplifying operation and improving maintenance efficiency. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0023] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of a junction box in the closed state according to an embodiment.

[0025] Figure 2 for Figure 1 The top view of the junction box behind the hidden cover is shown.

[0026] Figure 3 for Figure 2 The junction box shown is a cross-sectional view in section AA.

[0027] Figure 4 for Figure 1 The junction box shown is a cross-sectional view in section BB.

[0028] Figure 5 for Figure 1 The junction box shown is a cross-sectional view in section CC.

[0029] Figure 6 This is a cross-sectional view of a junction box in one embodiment with the cover open.

[0030] Figure 7 for Figure 6 The image shows a magnified view of part D.

[0031] Figure 8 for Figure 6 The image shows a magnified view of part F.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Box body; 11. Cavity; 111. First cavity; 112. Second cavity; 12. Electronic component; 13. Divider plate; 14. First fitting part; 141. First groove; 142. First protrusion; 20. Box cover; 21. Second fitting part; 211. Second protrusion; 212. Second groove; 30. Switch mechanism; 31. Knob; 32. Link assembly; 321. Switch shaft; 322. First link; 323. First pivot; 324. Second link; 325. Second pivot; 326. Movable arm; 3261. Main body section; 3262. First connecting section; 3263. Second connecting section; 327. Third pivot; 328. Guide rail component; 33. Track; 331. First track; 3311. Vertical section; 3312. Arc section; 332. Second track. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] Specifically, one embodiment of this application provides a junction box for interconnecting photovoltaic modules. See also... Figure 1 as well as Figure 2 One embodiment of the junction box includes a box body 10, a box cover 20, and a switching mechanism 30.

[0041] The housing 10 has an open cavity 11, which is used to house electronic components 12 such as cables, connectors, diodes, and heat sinks.

[0042] Combination Figure 5 as well as Figure 6 The cover 20 has a closed state with the opening closed and an open state with the opening open. In the closed state, the cover 20 can provide waterproof and dustproof protection for the electronic components 12 inside the cavity 11. In the open state, the electronic components 12 inside the cavity 11 can be inspected or replaced through the opening.

[0043] See also Figure 2 The switching mechanism 30 includes a knob 31 and a linkage assembly 32. The knob 31 is rotatably disposed on the outer wall of the housing 10. The linkage assembly 32 is disposed in the cavity 11 and connects the knob 31 and the housing cover 20. The linkage assembly 32 can drive the housing cover 20 to switch between a closed state and an open state under the drive of the knob 31.

[0044] In the aforementioned junction box, a knob 31 is rotatably mounted outside the box body 10, and a connecting rod assembly 32 is mounted inside the cavity 11 of the box body 10. The connecting rod assembly 32 connects the knob 31 to the box cover 20, and can switch the box cover 20 between a closed and open state under the drive of the knob 31. Thus, when maintenance is required inside the junction box, rotating the knob 31 drives the connecting rod assembly 32 to open the box cover 20, allowing maintenance to be performed through the opening. After maintenance is completed, rotating the knob 31 in the opposite direction drives the connecting rod assembly 32 to close the box cover 20. Compared to traditional junction boxes that require external tools to open or close the box cover 20, the junction box of this application can open or close the box cover 20 without tools, saving material costs and making operation more convenient. Furthermore, the opening and closing process does not cause deformation of the box cover 20, thus avoiding damage to the box cover 20. In addition, after the cover 20 is opened, the cover 20 can still be connected to the box body 10 as one unit through the connecting rod assembly 32, which avoids the problem of the cover 20 being easily lost after being opened. When closing the cover 20, there is no need to distinguish between the front and back of the cover 20, which further simplifies the operation and improves maintenance efficiency.

[0045] See Figure 4 In one embodiment, the linkage assembly 32 includes a first linkage 322, a second linkage 324, a movable arm 326, and a guide rail 328. One end of the first linkage 322 is fixedly connected to the knob 31 via a switch shaft 321. One end of the second linkage 324 is rotatably connected to the other end of the first linkage 322 via a first rotating shaft 323. The other end of the second linkage 324 is rotatably connected to a second rotating shaft 325. One end of the movable arm 326 is rotatably connected to the second rotating shaft 325, and the other end of the movable arm 326 is fixedly connected to the cover 20. A third rotating shaft 327 passes through the movable arm 326, and the third rotating shaft 327 is spaced apart from the second rotating shaft 325. The guide rail 328 is fixed to the cavity wall of the cavity 11. The guide rail 328 has a track 33. The second rotating shaft 325 and the third rotating shaft 327 are both inserted in the track 33 and can move along the track 33 to guide the movable arm 326 to switch the lid 20 between the closed state and the open state.

[0046] For example, combined Figure 4 as well as Figure 6When it is necessary to open the lid 20, by turning the knob 31 in the first circumferential direction (e.g., counterclockwise), the end of the first connecting rod 322 away from the switch shaft 321 will be lifted upward and the second connecting rod 324 will be rotated. Then, the second rotating shaft 325 and the third rotating shaft 327 will start to move along the track under the drive of the second connecting rod 324 and drive the movable arm 326 to move. As the knob 31 continues to rotate, the movable arm 326, under the constraint of the track 33, will first be lifted upward to lift the lid 20 upward away from the opening of the box body 10. Then, the movable arm 326 will start to rotate clockwise around the third rotating shaft 327 as the rotation center to drive the lid 20 to flip outward and put the lid 20 into the open state. At this time, the opening of the box body 10 can be opened.

[0047] Similarly, when it is necessary to close the lid 20, by turning the knob 31 in the second circumferential direction (e.g., clockwise), the end of the first connecting rod 322 away from the switch shaft 321 will be lowered and the second connecting rod 324 will be rotated. Then, the second rotating shaft 325 and the third rotating shaft 327 will start to move along the track under the drive of the second connecting rod 324 and drive the movable arm 326 to move. As the knob 31 continues to rotate, the movable arm 326, under the constraint of the track 33, will first start to rotate counterclockwise with the third rotating shaft 327 as the rotation center, so as to drive the lid 20 to flip inward until the lid 20 is directly above the opening. Then the lid 20 will start to descend and cover the opening, so that the lid 20 enters the closed state. At this time, the opening of the box 10 is closed by the lid 20.

[0048] See Figure 5 In one embodiment, for example, track 33 includes a first track 331 for guiding the movement of the second rotating shaft 325 and a second track 332 for guiding the movement of the third rotating shaft 327. The first track 331 includes a vertical segment 3311 and an arc segment 3312. The vertical segment 3311 extends along the thickness direction of the junction box, and the bottom end of the arc segment 3312 connects to the top end of the vertical segment 3311. The top end of the arc segment 3312 extends upward along an arc trajectory. The second rotating shaft 325 is movably disposed within the first track 331, and when the cover 20 is closed, the second rotating shaft 325 is located in the vertical segment 3311; when the cover 20 is open, the second rotating shaft 325 is located in the arc segment 3312. The second track 332 extends along the thickness direction of the junction box and is located above the vertical section 3311. The bottom end of the second track 332 is connected to the top end of the vertical section 3311. The top end of the second track 332 coincides with the center of the arc trajectory of the arc section 3312. The distance from the top end to the bottom end of the second track 332 is equal to the distance from the second rotating shaft 325 to the third rotating shaft 327. When the box cover 20 is closed, the third rotating shaft 327 is located at the bottom end of the second track 332. When the box cover 20 is open, the third rotating shaft 327 is located at the top end of the second track 332.

[0049] Combination Figure 4 as well as Figure 6 For example, during the opening of the box 10, the second rotating shaft 325, driven by the second connecting rod 324, first moves upward along the vertical section 3311, simultaneously driving the third rotating shaft 327 to move upward from the bottom end of the second track 332. During this process, the box cover 20 gradually lifts upward. When the third rotating shaft 327 moves to the top of the second track 332, since the distance from the top to the bottom of the second track 332 is equal to the distance from the second rotating shaft 325 to the third rotating shaft 327, the second rotating shaft 325 is now located at the bottom of the second track 332 (i.e., the top of the vertical section 3311 and the bottom of the arc section 3312). Furthermore, since the top of the second track 332 coincides with the center of the arc trajectory of the arc section 3312, as the second connecting rod 324 moves upward... As lever 324 continues to rotate, the second pivot 325 enters the arc segment 3312 and moves in a circular motion around the third pivot 327 along the arc segment 3312. During this process, the movable arm 326 rotates clockwise around the third pivot 327 because the position of the third pivot 327 remains unchanged while the second pivot 325 moves in a circular motion. This causes the lid 20 to flip outward. When the second pivot 325 reaches the top of the arc segment 3312, the lid 20 is in the open state. Similarly, the closing process of the lid 20 is the reverse of the opening process, and will not be described in detail here.

[0050] See Figure 5 In one embodiment, the top end of the arc segment 3312 is flush with the top end of the second track 332 in the thickness direction of the junction box, thereby ensuring that the cover 20 does not block the opening of the box body 10 when it is in the open state, so that the opening of the box body 10 can be fully opened, so that the staff can inspect the inside of the junction box.

[0051] See Figure 6 The movable arm 326 includes a main body segment 3261, a first connecting segment 3262, and a second connecting segment 3263. The first connecting segment 3262 is connected at an angle to one end of the main body segment 3261, and the second connecting segment 3263 is connected at an angle to the other end of the main body segment 3261. The first connecting segment 3262 and the second connecting segment 3263 extend in opposite directions. The end of the first connecting segment 3262 facing away from the main body segment 3261 is rotatably connected to a second rotating shaft 325, and the end of the second connecting segment 3263 facing away from the main body segment 3261 is fixedly connected to the lid 20. A third rotating shaft 327 is located at the connection between the first connecting segment 3262 and the main body segment 3261. This design ensures that the movable arm 326 does not expand against the cavity wall of the box 10 during movement, thus ensuring the lid 20 opens and closes smoothly.

[0052] See Figure 2 as well as Figure 3The linkage assembly 32 includes two movable arms 326 and two guide rails 328. The two guide rails 328 are respectively disposed on two opposite cavity walls of the cavity 11. The movable arms 326 and the guide rails 328 are arranged in a one-to-one correspondence. The two ends of the second rotating shaft 325 are connected to the two movable arms 326 in a one-to-one correspondence and pass through the tracks 33 of the two guide rails 328 in a one-to-one correspondence, so that the two movable arms 326 move synchronously. By simultaneously driving the lid 20 to open or close through the two movable arms 326, the smoothness of the opening and closing of the lid 20 is improved.

[0053] See Figure 2 In one embodiment, the junction box further includes a partition plate 13 disposed within the cavity 11, dividing the cavity 11 into a first cavity 111 and a second cavity 112. The first cavity 111 is used to house the electronic component 12, and the second cavity 112 is used to house the linkage assembly 32. Exemplarily, the electronic component 12 includes, but is not limited to, components such as cables, connectors, diodes, and heat sinks. Optionally, the first cavity 111 is sealed with a sealant such as silicone, which provides insulation, waterproofing, and heat dissipation for the electronic component 12. Separating the first cavity 111 and the second cavity 112 by the partition plate 13 effectively prevents sealant from entering the second cavity 112 and affecting the movement of the linkage assembly 32.

[0054] See Figure 6 In one embodiment, the cavity wall of the cavity 11 is provided with a first fitting portion 14, and the edge of the lid 20 is provided with a second fitting portion 21. When the lid 20 is in the closed state, the first fitting portion 14 and the second fitting portion 21 are engaged. By engaging the first fitting portion 14 and the second fitting portion 21, the sealing performance of the lid 20 to the box body 10 can be improved.

[0055] See Figure 7 as well as Figure 8 In one embodiment, the first fitting portion 14 includes a first groove 141 and two first protrusions 142, which are respectively disposed on both sides of the first groove 141. The second fitting portion 21 includes a second protrusion 211 and two second grooves 212, which are respectively disposed on both sides of the second protrusion 211. When the lid 20 is in the closed state, the first protrusions 142 are fitted into the second grooves 212, and the second protrusions 211 are fitted into the first grooves 141, thereby enhancing the sealing between the lid 20 and the box body 10. It is worth noting that in other embodiments, the first fitting portion 14 may include a second protrusion 211 and two second grooves 212 respectively disposed on both sides of the second protrusion 211, and the second fitting portion 21 may include a first groove 141 and two second protrusions 211 respectively disposed on both sides of the first groove 141. This can also achieve the effect of increasing the sealing between the lid 20 and the box body 10.

[0056] One embodiment of this application also provides a photovoltaic module. The photovoltaic module of one embodiment includes the junction box of any of the above embodiments. The junction box is used to connect with the busbar inside the photovoltaic module to conduct the current inside the photovoltaic module and finally connect it to the power grid.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A junction box, characterized in that, include: Box body (10), the box body (10) is provided with a cavity (11) with an opening; The lid (20) has a closed state that closes the opening and an open state that opens the opening; The switching mechanism (30) includes a knob (31) and a linkage assembly (32). The knob (31) is rotatably disposed on the outer wall of the housing (10). The linkage assembly (32) is disposed in the cavity (11) and connects the knob (31) and the lid (20). The linkage assembly (32) can drive the lid (20) to switch between the closed state and the open state under the drive of the knob (31).

2. The junction box according to claim 1, characterized in that, The link assembly (32) includes: The first link (322) has one end fixedly connected to the knob (31) via a switch shaft (321); The second link (324) has one end rotatably connected to the other end of the first link (322) via a first pivot (323); the other end of the second link (324) is rotatably connected to a second pivot (325). A movable arm (326), one end of which is rotatably connected to the second rotating shaft (325), and the other end of which is fixedly connected to the box cover (20), and a third rotating shaft (327) is threaded through the movable arm (326), the third rotating shaft (327) being spaced apart from the second rotating shaft (325); and, The guide rail (328) is fixed to the cavity wall of the cavity (11). The guide rail (328) has a track (33). The second rotating shaft (325) and the third rotating shaft (327) are both inserted in the track (33) and can move along the track (33) to guide the movable arm (326) to drive the box cover (20) to switch between the closed state and the open state.

3. The junction box according to claim 2, characterized in that, The track (33) includes: The first track (331) includes a vertical section (3311) and an arc section (3312). The vertical section (3311) extends along the thickness direction of the junction box. The bottom end of the arc section (3312) is connected to the top end of the vertical section (3311). The top end of the arc section (3312) extends upward along an arc trajectory. The second rotating shaft (325) is movably inserted in the first track (331). When the box cover (20) is in the closed state, the second rotating shaft (325) is located in the vertical section (3311). When the box cover (20) is in the open state, the second rotating shaft (325) is located in the arc section (3312). The second track (332) extends along the thickness direction of the junction box and is located above the vertical section (3311). The bottom end of the second track (332) is connected to the top end of the vertical section (3311). The top end of the second track (332) coincides with the center of the arc trajectory. The distance from the top end of the second track (332) to the bottom end of the second track (332) is equal to the distance from the second pivot (325) to the third pivot (327). When the box cover (20) is in the closed state, the third pivot (327) is located at the bottom end of the second track (332). When the box cover (20) is in the open state, the third pivot (327) is located at the top end of the second track (332).

4. The junction box according to claim 3, characterized in that, In the thickness direction of the junction box, the top end of the arc segment (3312) is flush with the top end of the second track (332).

5. The junction box according to claim 2, characterized in that, The movable arm (326) includes a main body section (3261), a first connecting section (3262), and a second connecting section (3263). The first connecting section (3262) is connected at an angle to one end of the main body section (3261), and the second connecting section (3263) is connected at an angle to the other end of the main body section (3261). The first connecting section (3262) and the second connecting section (3263) extend in opposite directions. The end of the first connecting section (3262) away from the main body section (3261) is rotatably connected to the second rotating shaft (325). The end of the second connecting section (3263) away from the main body section (3261) is fixedly connected to the lid (20). The third rotating shaft (327) is located at the connection between the first connecting section (3262) and the main body section (3261).

6. The junction box according to claim 2, characterized in that, The linkage assembly (32) includes two movable arms (326) and two guide rails (328). The two guide rails (328) are respectively disposed on two opposite cavity walls of the cavity (11). The movable arms (326) and the guide rails (328) are disposed in a one-to-one correspondence. The second rotating shaft (325) connects the two movable arms (326), and the two ends of the second rotating shaft (325) are respectively inserted into the tracks (33) of the two guide rails (328) so that the two movable arms (326) move synchronously.

7. The junction box according to claim 2, characterized in that, The junction box also includes a partition plate (13), which is disposed in the cavity (11) and divides the cavity (11) into a first cavity (111) and a second cavity (112). The first cavity (111) is used to accommodate electronic components (12), and the second cavity (112) is used to accommodate the connecting rod assembly (32).

8. The junction box according to claim 1, characterized in that, The cavity wall of the cavity (11) is provided with a first fitting part (14), and the edge of the lid (20) is provided with a second fitting part (21). When the lid (20) is in the closed state, the first fitting part (14) and the second fitting part (21) fit together.

9. The junction box according to claim 8, characterized in that, One of the first fitting part (14) and the second fitting part (21) includes a first groove (141) and two first protrusions (142), the two first protrusions (142) being respectively disposed on both sides of the first groove (141). The other of the first fitting part (14) and the second fitting part (21) includes a second protrusion (211) and two second grooves (212), the two second grooves (212) being respectively disposed on both sides of the second protrusion (211). When the lid (20) is in the closed state, the first protrusion (142) is fitted into the second groove (212), and the second protrusion (211) is fitted into the first groove (141).

10. A photovoltaic module, characterized in that, Includes the junction box as described in any one of claims 1-9.

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