Cassette

Abstract

The utility model discloses a cassette, which relates to the technical field of electrical accessories and comprises a box body and bearing lugs. A fixing structure is integrally formed on the inner wall of the box body, and an inserting gap is formed between the fixing structure and the inner wall. The fixing structure comprises a clamping rod and a limiting rod which are perpendicular to each other, the clamping rod is parallel to a bottom plate of the box body, and the limiting rod is connected to the middle of the clamping rod and located on the side, close to the bottom plate, of the clamping rod. The bearing lug comprises a connecting section and an inserting section, the connecting section is provided with a mounting hole, and the inserting section can be inserted into the inserting gap. Elastic clamping pieces are symmetrically arranged on the two sides of the insertion section, when the insertion section is completely inserted, the elastic clamping pieces on the two sides are clamped to the side, connected with the limiting rod, of the clamping rod, and the middle of the insertion section abuts against the limiting rod. The cassette provided by the utility model can simplify the structure while ensuring stable installation, is convenient to assemble and manufacture, and improves the production efficiency.

Description

Technical Field

[0001] This application relates to the field of electrical accessories technology, specifically to a dark box. Background Technology

[0002] The 86-type junction boxes currently sold on the market are mainly used in building electrical wiring systems to fix electrical components such as switches and sockets and to protect internal wire connections.

[0003] A junction box typically consists of a box body and lugs. The lugs are used to securely connect panel switches or panel sockets. In existing junction boxes, the box body and lugs need to be assembled separately, and additional fasteners are required to secure the connection. The assembly structure is relatively complex, which affects the production efficiency of the junction box.

[0004] Therefore, there is an urgent need to propose a concealed box to optimize the installation structure of the lug, simplify the structure while ensuring installation stability, facilitate assembly and manufacturing, and improve production efficiency. Utility Model Content

[0005] The purpose of this application is to provide a dark box that simplifies the structure, facilitates assembly and manufacturing, and improves production efficiency while ensuring stable installation.

[0006] This application provides a concealed box, including a box body and a lug. A fixing structure is integrally formed on the inner wall of the box body, forming an insertion gap between the fixing structure and the inner wall. The fixing structure includes a locking rod and a limiting rod perpendicular to each other. The locking rod is parallel to the bottom plate of the box body, and the limiting rod is connected to the middle of the locking rod and located on the side of the locking rod closest to the bottom plate. The lug includes a connecting section and an insertion section. The connecting section has a mounting hole, and the insertion section can be inserted into the insertion gap. Elastic locking tabs are symmetrically arranged on both sides of the insertion section. When the insertion section is fully inserted, the elastic locking tabs on both sides engage with the side of the locking rod connected to the limiting rod, and the middle of the insertion section abuts against the limiting rod.

[0007] The fixing structure, composed of mutually perpendicular locking rods and limiting rods, forms a unique T-shaped structure. This type of fixing structure design achieves a three-point fixing mechanism. The elastic locking tabs on both sides of the socket insertion section engage with the locking rods, and the limiting rods abut against the middle of the insertion section, ensuring the stability of the socket installation. The entire structure, while ensuring connection reliability, significantly simplifies structural design, facilitates assembly and manufacturing, and helps improve production efficiency and reduce production costs.

[0008] In some examples, both ends of the snap-fit ​​rod are provided with a first support foot, and the end of the limiting rod away from the snap-fit ​​rod is provided with a second support foot. The first support foot, the second support foot, the snap-fit ​​rod, the limiting rod, and the inner wall together form an insertion gap.

[0009] By setting the first and second support feet, an accurate insertion gap can be formed between the snap-fit ​​rod and the inner wall of the box, as well as between the limiting rod and the inner wall of the box. The arrangement of the three support points ensures the dimensional stability of the insertion gap, avoids assembly problems caused by manufacturing tolerances, and facilitates the smooth installation of the lugs.

[0010] In some examples, the first outer side wall of the box is provided with at least one plug-in post, and the second outer side wall of the box is provided with at least one plug-in hole corresponding to the at least one plug-in post.

[0011] The first outer wall and the second outer wall are opposite to each other. When the two boxes are assembled, the first plug-in post of one box can be inserted into the first plug-in hole of the other box.

[0012] By aligning the plug-in posts and holes on the box body, multiple junction boxes can be quickly assembled and installed. When multiple junction boxes need to be installed side by side, simply align the plug-in post of one junction box with the plug-in hole of the adjacent junction box and apply appropriate pressure to complete the connection. This design is simple in structure and efficient in installation, making it particularly suitable for electrical wiring applications requiring group installation. It ensures accurate positioning between multiple junction boxes while maintaining a neat installation arrangement.

[0013] In some examples, the second outer side wall is provided with an extension post, and the insertion hole is located on the extension post and is coaxial with the extension post.

[0014] The extension post can extend the length of the insertion hole, thereby increasing the insertion length between the insertion post and the insertion hole, significantly improving the stability and torsional resistance of the insertion part, and providing reliable support for the accurate connection of two adjacent junction boxes.

[0015] In some examples, the sidewall of the extension post is provided with an extension groove that communicates with the insertion hole. When the insertion post is inserted into the insertion hole, the extension groove allows the insertion hole to expand radially.

[0016] By creating extension grooves on the extension post that connect to the insertion hole, the extension post can undergo controllable elastic deformation under stress. During the insertion of the insertion post, the extension groove structure provides the necessary deformation space for the extension post, allowing the insertion hole to expand radially to achieve a smoother assembly process and a tighter final fit.

[0017] In some examples, a first stiffener is provided on the periphery of the first outer side wall, and a second stiffener is provided on the periphery of the second outer side wall. The first stiffener has a first snap-fit ​​portion, and the second stiffener has a second snap-fit ​​portion. When the two boxes are assembled, the first stiffener and the second stiffener abut against each other, and the first snap-fit ​​portion of one box can snap into the second snap-fit ​​portion of the other box.

[0018] The design of the first and second stiffening plates can form a sealed structure between the two boxes after they are assembled, preventing mud and other debris from seeping into the two boxes during construction, thereby improving the protective performance of the junction box and reducing the risk of damage to the wires.

[0019] In some examples, the first snap-fit ​​portion includes a first extension piece with a snap-fit ​​hole and a first snap-fit ​​groove with a snap-fit ​​boss, and the second snap-fit ​​portion includes a second snap-fit ​​groove with a snap-fit ​​boss and a second extension piece with a snap-fit ​​hole. When the two boxes are assembled, the first extension piece of one box is snapped into the second snap-fit ​​groove of the other box, and the first snap-fit ​​groove is snapped into the second extension piece of the other box.

[0020] The design of inserting extension pieces into the snap-fit ​​slots and using bidirectional snap-fit ​​can form a cross-interlocking structure. That is, the horizontal extension piece of each box will be embedded into the vertical snap-fit ​​slot of the adjacent box, and at the same time, its own vertical snap-fit ​​slot will lock the horizontal extension piece of the adjacent box. Compared with the traditional one-way snap-fit, it has higher connection stability.

[0021] In some examples, multiple first ribs are spaced apart on the first stiffener, and multiple second ribs are spaced apart on the second stiffener.

[0022] The arrangement of multiple ribs can enhance the structural strength of the first and second stiffeners, reduce the risk of bending or breaking of the first and second stiffeners under stress, improve the reliability of the sealing barrier formed by the first and second stiffeners, and thus improve the reliability of the cassette.

[0023] In some examples, the periphery of the first outer side wall is provided with a first stiffening plate, and the periphery of the second outer side wall is provided with a receiving groove corresponding to the first stiffening plate. When the two boxes are assembled, the first stiffening plate of one box can be inserted into the receiving groove of the other box.

[0024] Unlike the combination of the first and second stiffeners mentioned above, the first stiffener is inserted into the receiving groove to seal the gap between the two boxes. This not only improves the sealing performance but also simplifies the installation process. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of two dark boxes assembled according to an embodiment of this application.

[0027] Figure 2 An exploded view of the dark box provided in an embodiment of this application.

[0028] Figure 3 Provided for the embodiments of this application Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 This is a side view of the dark box provided in an embodiment of this application.

[0030] Figure 5 Provided for the embodiments of this application Figure 4 Enlarged view of point B in the middle.

[0031] Figure 6 This is a schematic diagram of the bottom structure of the two boxes assembled according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 100, dark box; 1, box body; 11, fixing structure; 111, snap-fit ​​rod; 112, limiting rod; 113, first support leg; 114, second support leg; 12, base plate; 13, first outer side wall; 131, insertion post; 132, first stiffening plate; 133, first snap-fit ​​part; 1331, first extension piece; 1332, first snap-fit ​​groove; 134, first rib plate; 14, second outer side wall; 141, insertion hole; 142, extension post; 1421, extension groove; 143, second stiffening plate; 144, second snap-fit ​​part; 1441, second extension piece; 1442, second snap-fit ​​groove; 145, second rib plate; 2, lug; 21, connecting section; 211, mounting hole; 22, insertion section; 221, elastic snap-fit ​​piece. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Junction boxes are typically embedded in walls for internal wiring and for mounting wall sockets or switches. A junction box usually consists of a box body and lugs. The box body is embedded in the wall, the lugs are fixedly mounted inside the box, and wall switches and sockets can be secured to the lugs with screws.

[0039] However, in existing junction boxes, the connection structure between the box body and the lug is relatively complex, resulting in a complicated manufacturing process and unstable connection, which in turn affects the installation stability of panel switches and panel sockets.

[0040] Based on this, the present application provides a dark box that simplifies the structure, facilitates assembly and manufacturing, and improves production efficiency while ensuring stable installation.

[0041] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0042] Please refer to Figures 1 to 3This embodiment provides a concealed box 100, including a box body 1 and a lug 2. A fixing structure 11 is integrally formed on the inner wall of the box body 1, and an insertion gap is formed between the fixing structure 11 and the inner wall. The fixing structure 11 includes a locking rod 111 and a limiting rod 112 that are perpendicular to each other. The locking rod 111 is parallel to the bottom plate 12 of the box body 1, and the limiting rod 112 is connected to the middle of the locking rod 111 and is located on the side of the locking rod 111 closer to the bottom plate 12.

[0043] The lug 2 includes a connecting section 21 and an insertion section 22. The connecting section 21 is provided with a mounting hole 211, and the insertion section 22 can be inserted into the insertion gap. Flexible snap-fit ​​pieces 221 are symmetrically arranged on both sides of the insertion section 22. When the insertion section 22 is fully inserted, the flexible snap-fit ​​pieces 221 on both sides snap onto one side of the snap-fit ​​rod 111 connecting to the limiting rod 112, and the middle part of the insertion section 22 abuts against the limiting rod 112.

[0044] The fixing structure 11, composed of mutually perpendicular locking rods 111 and limiting rods 112, forms a unique T-shaped structure. This type of fixing structure 11 achieves a three-point fixing mechanism. The elastic locking pieces 221 on both sides of the insertion section 22 of the ear 2 engage with the locking rods 111, and the limiting rods 112 abut against the middle of the insertion section 22, ensuring the stability of the ear 2 installation. The entire structure, while ensuring reliable connection, significantly simplifies structural design, facilitates assembly and manufacturing, and helps improve production efficiency and reduce production costs.

[0045] Specifically, refer to Figure 2 and Figure 3 The fixing structure 11 is set on the inner wall of the box body 1. Only the inner wall of the box body 1 needs to be processed to form the fixing structure 11. Compared with the previous form where both the inner and outer walls of the box body 1 need to be processed, the fixing structure 11 provided in this embodiment has a simpler processing procedure and higher production efficiency.

[0046] The fixed structure 11 forms an insertion gap with the inner wall, into which the lug 2 can be inserted. This insertion gap can be formed by opening a hole in the inner wall, with the hole wall serving as the fixed structure 11, or by the fixed structure 11 protruding from the inner wall and enclosing the inner wall to form the insertion gap.

[0047] The snap-fit ​​rod 111 in the fixed structure 11 is parallel to the bottom plate 12 of the box body 1, which means that the snap-fit ​​rod 111 is a horizontal rod in the fixed structure 11. The limiting rod 112 is vertically connected to the middle of the snap-fit ​​rod 111 and is located on the side of the snap-fit ​​rod 111 close to the bottom plate 12, which means that the limiting rod 112 is a vertical rod in the fixed structure 11. The horizontal snap-fit ​​rod 111 and the vertical limiting rod 112 form a T-shaped structure. This structure design is simple and easy to process and form.

[0048] Reference Figure 2 and Figure 3 The lug 2 includes a connecting section 21 and an insertion section 22. The connecting section 21, which is fixedly connected to the panel switch or panel socket, is usually provided with a mounting hole 211. The panel switch or panel socket can be fixedly connected to the connecting section 21 by screws. The insertion section 22 is used to insert into the insertion gap formed between the fixing structure 11 and the inner wall of the box 1. The insertion section 22 is also perpendicular to the connecting section 21. The insertion section 22 is parallel to the inner wall of the box 1, while the connecting section 21 is parallel to the bottom plate 12 of the box 1.

[0049] Symmetrical elastic snap-fit ​​pieces 221 are provided on opposite sides of the insertion section 22. During the insertion of the insertion section 22 into the insertion gap, the elastic snap-fit ​​pieces 221 will be squeezed and contracted by the snap-fit ​​rod 111. When the elastic snap-fit ​​pieces 221 are in the contracted state and continue to be inserted through the snap-fit ​​rod 111, the elastic snap-fit ​​pieces 221 quickly recover their deformation. At this time, the raised end of the elastic snap-fit ​​pieces 221 will abut against the side of the snap-fit ​​rod 111 near the bottom plate 12 of the box body 1, so that the insertion section 22 cannot easily disengage from the insertion gap.

[0050] The gap between the two elastic snap-fit ​​pieces 221 matches the width of the limiting rod 112. This way, after the insertion section 22 is inserted into the insertion gap, the elastic snap-fit ​​pieces 221 can avoid the limiting rod 112 and snap onto the snap-fit ​​rod 111. Meanwhile, the limiting rod 112 abuts against the two elastic snap-fit ​​pieces 221 of the insertion section 22, thus limiting the insertion section 22.

[0051] With the two elastic snap-fit ​​pieces 221 snap-fitting with the snap-fit ​​rod 111 respectively, and with the limiting rod 112 and the insertion section 22 limiting the fit, the three points between the fixing structure 11 and the ear 2 are fixed, which can provide a stable fixing effect while being simple in structure.

[0052] Reference Figure 2 and Figure 3 In some examples, both ends of the snap-fit ​​rod 111 are provided with first support feet 113, and the end of the limiting rod 112 away from the snap-fit ​​rod 111 is provided with a second support foot 114. The first support foot 113, the second support foot 114, the snap-fit ​​rod 111, the limiting rod 112 and the inner wall together form an insertion gap.

[0053] By setting the first support foot 113 and the second support foot 114, an accurate insertion gap can be formed between the snap-fit ​​rod 111 and the inner wall of the box body 1 and between the limiting rod 112 and the inner wall of the box body 1. The arrangement of the three support points ensures the dimensional stability of the insertion gap, avoids assembly problems caused by manufacturing tolerances, and facilitates the smooth installation of the lug 2.

[0054] Both ends of the snap-fit ​​rod 111 are provided with first support feet 113. The two first support feet 113, the snap-fit ​​rod 111 and the box body 1 are integrally formed. This not only ensures that there is a gap between the snap-fit ​​rod 111 and the inner wall of the box body 1, but also makes the snap-fit ​​rod 111 have sufficient strength to bear the force used for fixing the connection on the ear 2.

[0055] Reference Figure 2 and Figure 3 One end of the limiting rod 112 is connected to the snap-fit ​​rod 111, and the other end of the limiting rod 112 is provided with a second support foot 114. The limiting rod 112, the second support foot 114, the snap-fit ​​rod 111, the first support foot 113 and the box body 1 are all integrally formed. This can ensure that there is a gap between the limiting rod 112 and the inner wall of the box body 1, and can also make the limiting rod 112 have sufficient strength to provide sufficient limiting effect to the insertion section 22, ensuring the reliable installation of the ear 2.

[0056] The size of the first support leg 113 is larger than the size of the locking rod 111. This ensures that the first support leg 113 has sufficient strength and prevents the locking rod 111 from breaking due to excessive force. The size of the second support leg 114 is larger than the size of the limiting rod 112. This ensures that the second support leg 114 has sufficient strength and prevents the limiting rod 112 from breaking due to excessive force, thus jointly improving the strength of the fixing structure 11.

[0057] Reference Figure 1 and Figure 2 In some examples, the first outer side wall 13 of the box body 1 is provided with at least one insertion post 131, and the second outer side wall 14 of the box body 1 is provided with at least one insertion hole 141 corresponding to the at least one insertion post 131. The first outer side wall 13 and the second outer side wall 14 are opposite to each other. When the two box bodies 1 are assembled, the first insertion post 131 of one box body 1 can be inserted into the first insertion hole 141 of the other box body 1.

[0058] By arranging the plug-in posts 131 and plug-in holes 141 opposite each other on the housing 1, the quick assembly and installation of multiple junction boxes 100 is facilitated. When multiple junction boxes 100 need to be installed side by side, simply align the plug-in post 131 of one junction box 100 with the plug-in hole 141 of the adjacent junction box 100 and apply appropriate pressure to complete the connection. This design is simple in structure and efficient in installation, and is particularly suitable for electrical wiring applications that require group installation. It can ensure accurate positioning between multiple junction boxes 100 and maintain a neat installation arrangement.

[0059] The design of the connector 131 and connector 141 maintains the simplicity of the junction box 100's appearance, eliminating the need for additional connecting parts, thus saving materials and facilitating mass production. In actual construction, this design significantly improves the installation efficiency of the multi-unit junction box 100 while ensuring the neatness and stability of the installed structure.

[0060] Reference Figure 4 In some examples, the second outer sidewall 14 is provided with an extension post 142, and a insertion hole 141 is provided on the extension post 142 and coaxial with the extension post 142.

[0061] The extension post 142 extends the length of the insertion hole 141, thereby increasing the insertion length between the insertion post 131 and the insertion hole 141, significantly improving the stability and torsional resistance of the insertion part, and providing reliable support for the accurate connection of two adjacent junction boxes 100.

[0062] Specifically, the extension post 142 is perpendicular to the second outer side wall 14 and extends away from the second outer side wall 14. The insertion hole 141 is coaxially disposed on the extension post 142. When the insertion post 131 is inserted, the inner wall of the extension post 142 provides full-process guidance, while its outer wall enhances the overall rigidity of the side wall. This integrated design simplifies the mold structure and improves the reliability of the product.

[0063] Reference Figure 4 and Figure 5 In some examples, the sidewall of the extension post 142 is provided with an extension groove 1421, which communicates with the insertion hole 141. When the insertion post 131 is inserted into the insertion hole 141, the extension groove 1421 allows the insertion hole 141 to expand radially.

[0064] By creating an extension groove 1421 on the extension post 142 that connects to the insertion hole 141, the extension post 142 can undergo controllable elastic deformation under stress. During the insertion of the insertion post 131, the extension groove 1421 structure provides the necessary deformation space for the extension post 142, allowing the insertion hole 141 to undergo moderate radial expansion, thereby achieving a smoother assembly process and a tighter final fit.

[0065] Specifically, the insertion hole 141 and the extension post 142 are coaxially arranged, and the diameter of the insertion hole 141 is smaller than the diameter of the extension post 142. An extension groove 1421 is formed on the side wall of the extension post 142 and extends from the end of the extension post 142 away from the housing 1 towards the middle of the extension post 142, and the extension groove 1421 connects to the insertion hole 141. The diameter of the insertion post 131 is slightly larger than the diameter of the insertion hole 141. When two adjacent dark boxes 100 are assembled, the insertion post 131 can be inserted into the insertion hole 141. During insertion, the insertion hole 141 is gradually expanded, and the extension groove 1421 expands accordingly.

[0066] Practical applications show that this extension post 142 structure with extension groove 1421 effectively solves the tolerance absorption problem in the mating of plastic parts, while avoiding excessive insertion force requirements, significantly improving the assembly experience and connection reliability. The extension groove 1421 can be in the form of a straight line, a curve, or a combination thereof, and its key feature is that it can provide the necessary elastic deformation capacity for the extension post 142.

[0067] Reference Figure 4 and Figure 6 In some examples, the periphery of the first outer side wall 13 is provided with a first stiffening plate 132, and the periphery of the second outer side wall 14 is provided with a second stiffening plate 143. The first stiffening plate 132 is provided with a first snap-fit ​​portion 133, and the second stiffening plate 143 is provided with a second snap-fit ​​portion 144. When the two boxes 1 are assembled, the first stiffening plate 132 and the second stiffening plate 143 abut against each other, and the first snap-fit ​​portion 133 of one box 1 can be snapped into the second snap-fit ​​portion 144 of the other box 1.

[0068] The design of the first stiffening plate 132 and the second stiffening plate 143 can form a sealed structure between the two boxes 1 after they are assembled, preventing mud and other debris from seeping into the two boxes 1 during construction, thereby improving the protective performance of the junction box 100 and reducing the risk of damage to the wires.

[0069] The first stiffener 132 extends from the first outer side wall 13 in a direction away from the box body 1, and the second stiffener 143 extends from the second outer side wall 14 in a direction away from the box body 1. Furthermore, the first stiffener 132 is provided along three sides of the first outer side wall 13, but not on the side where the box body 1 opens, and the second stiffener 143 is the same.

[0070] When assembling the two boxes 1, the end face of the first stiffener 132 can abut against the end face of the second stiffener 143, thus sealing the gap between the two boxes 1 and preventing foreign objects from entering. In an optional embodiment, the first stiffener 132 can also abut against the second stiffener 143 in an alternating manner, for example, the inner side of the first stiffener 132 abuts against the outer side of the second stiffener 143.

[0071] In addition, the first snap-fit ​​part 133 and the second snap-fit ​​part 144 can fix the two boxes 1 together, which can not only improve the connection stability of the two adjacent boxes 1, but also keep the first stiffener 132 and the second stiffener 143 in close contact, so as to improve the protection performance and reliability of the dark box 100.

[0072] Reference Figure 4 and Figure 6In some examples, the first snap-fit ​​portion 133 includes a first extension piece 1331 with a snap-fit ​​hole and a first snap-fit ​​groove 1332 with a snap-fit ​​boss, and the second snap-fit ​​portion 144 includes a second snap-fit ​​groove 1442 with a snap-fit ​​boss and a second extension piece 1441 with a snap-fit ​​hole. When the two boxes 1 are assembled, the first extension piece 1331 of one box 1 is snapped into the second snap-fit ​​groove 1442 of the other box 1, and the first snap-fit ​​groove 1332 is snapped into the second extension piece 1441 of the other box 1.

[0073] The design of inserting the extension piece into the slot and using a two-way snap-fit ​​can form a cross-interlocking structure. That is, the horizontal extension piece of each box 1 will be embedded into the vertical slot of the adjacent box 1, and at the same time, its own vertical slot will lock the horizontal extension piece of the adjacent box 1. Compared with the traditional one-way snap-fit, it has higher connection stability.

[0074] The first extension piece 1331 extends from the first rib 132 in a direction away from the box body 1. The first extension piece 1331 has a snap-fit ​​hole, and the first snap-fit ​​groove 1332 is provided on the first rib 132. The first snap-fit ​​groove 1332 has a snap-fit ​​boss. The first extension piece 1331 is the same as the second extension piece 1441, and the first snap-fit ​​groove 1332 is the same as the second snap-fit ​​groove 1442.

[0075] In this embodiment, the first outer wall 13 and the second outer wall 14 are two opposite sidewalls on the box body 1. That is, the first stiffener 132 and the second stiffener 143 extend in opposite directions, the insertion post 131 extends in opposite directions as does the extension post 142, and the first extension piece 1331 extends in opposite directions as does the second extension piece 1441. When assembling the two box bodies 1, the first outer wall 13 of one box body 1 needs to be aligned with the second outer wall 14 of the other box body 1 to achieve the corresponding connection of the two box bodies 1.

[0076] In this embodiment, the first extension piece 1331 and the second extension piece 1441 are staggered, that is, the first extension piece 1331 and the second extension piece 1441 are diagonally arranged, and the first snap-fit ​​groove 1332 and the second snap-fit ​​groove 1442 are diagonally arranged. The first snap-fit ​​portion 133 is located on the first rib 132 near the bottom plate 12 of the box body 1, and the second snap-fit ​​portion 144 is located on the second rib 143 near the bottom plate 12 of the box body 1. When assembling the two box bodies 1, the first snap-fit ​​piece is inserted into and snaps into the second snap-fit ​​groove 1442, and the second snap-fit ​​piece is inserted into and snaps into the first snap-fit ​​groove 1332.

[0077] Actual testing shows that this cross-interlocking structure exhibits excellent resistance to deformation under the pressure of wall pouring, and the sealing performance of the interlocking parts effectively prevents the penetration of cement slurry. The elastic deformation characteristics of the extension piece and the rigid support characteristics of the interlocking groove complement each other, making the entire connection system both easy to install and reliable in use.

[0078] Reference Figure 4 and Figure 6 In some examples, a plurality of first ribs 134 are provided at intervals on the first stiffener 132, and a plurality of second ribs 145 are provided at intervals on the second stiffener 143.

[0079] The arrangement of multiple ribs can enhance the structural strength of the first rib 132 and the second rib 143, reduce the risk of bending or breaking of the first rib 132 and the second rib 143 under stress, improve the reliability of the sealing barrier formed by the first rib 132 and the second rib 143, and thus improve the reliability of the use of the dark box 100.

[0080] Multiple first ribs 134 are spaced apart between the first stiffening plate 132 and the first outer side wall 13. The multiple first ribs 134 can all be located inside the first stiffening plate 132, or all be located outside the first stiffening plate 132, or some can be located inside and some outside. The multiple second ribs 145 are arranged similarly.

[0081] In some examples, the periphery of the first outer side wall 13 is provided with a first stiffener 132, and the periphery of the second outer side wall 14 is provided with a receiving groove (not shown in the figure) corresponding to the first stiffener 132. When the two boxes 1 are assembled, the first stiffener 132 of one box 1 can be inserted into the receiving groove of the other box 1.

[0082] Unlike the form in which the first stiffener 132 and the second stiffener 143 are matched, the first stiffener 132 is inserted into the receiving groove to seal the gap between the two boxes 1, which can improve the sealing performance and simplify the installation process.

[0083] Specifically, the first outer side wall 13 is provided with a first stiffening plate 132, and the second outer side wall 14 is provided with a receiving groove. This arrangement allows for sealing by simply inserting the first stiffening plate 132 of one box 1 into the receiving groove of the other box 1 when assembling the two boxes 1, without needing to check whether each surface is aligned, thus improving installation efficiency.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cartridge, characterized by, include: The box body has a fixed structure integrally formed on its inner wall, and an insertion gap is formed between the fixed structure and the inner wall. The fixing structure includes a locking rod and a limiting rod that are perpendicular to each other. The locking rod is parallel to the bottom plate of the box body, and the limiting rod is connected to the middle of the locking rod and located on the side of the locking rod closer to the bottom plate. The lug includes a connecting section and an insertion section, the connecting section having a mounting hole, and the insertion section being able to be inserted into the insertion gap; The insertion section is symmetrically provided with elastic snap-fit ​​pieces on both sides. When the insertion section is fully inserted, the elastic snap-fit ​​pieces on both sides snap onto the side of the snap-fit ​​rod that connects to the limiting rod, and the middle part of the insertion section abuts against the limiting rod.

2. The cartridge of claim 1, wherein Both ends of the snap-fit ​​rod are provided with first support feet, and the end of the limiting rod away from the snap-fit ​​rod is provided with a second support foot. The first support feet, the second support feet, the snap-fit ​​rod, the limiting rod, and the inner wall together form the insertion gap.

3. The cartridge of claim 1, wherein, The first outer side wall of the box body is provided with at least one plug-in post, and the second outer side wall of the box body is provided with at least one plug-in hole corresponding to the at least one plug-in post; Wherein, the first outer side wall and the second outer side wall are opposite to each other, and when the two boxes are assembled, the plug-in post of one box can be inserted into the plug-in hole of the other box.

4. The cartridge of claim 3, wherein, The second outer side wall is provided with an extension post, and the insertion hole is provided on the extension post and is coaxial with the extension post.

5. The cartridge of claim 4, wherein, The side wall of the extension post is provided with an extension groove, which communicates with the insertion hole. When the insertion post is inserted into the insertion hole, the extension groove allows the insertion hole to expand radially.

6. The cartridge of claim 3, wherein The first outer side wall is provided with a first stiffening plate on its periphery, and the second outer side wall is provided with a second stiffening plate on its periphery. The first stiffening plate is provided with a first snap-fit ​​portion, and the second stiffening plate is provided with a second snap-fit ​​portion. When the two boxes are assembled, the first stiffening plate and the second stiffening plate abut against each other, and the first snap-fit ​​portion of one box can be snapped into the second snap-fit ​​portion of the other box.

7. The cartridge of claim 6, wherein, The first snap-fit ​​portion includes a first extension piece with a snap-fit ​​hole and a first snap-fit ​​groove with a snap-fit ​​boss; the second snap-fit ​​portion includes a second snap-fit ​​groove with a snap-fit ​​boss and a second extension piece with a snap-fit ​​hole. When the two boxes are assembled, the first extension piece of one of the boxes is engaged with the second engagement slot of the other box, and the first engagement slot is engaged with the second extension piece of the other box.

8. The cartridge of claim 6, wherein, The first stiffener has multiple first ribs spaced apart, and the second stiffener has multiple second ribs spaced apart.

9. The cartridge of claim 3, wherein, The first outer side wall is provided with a first stiffening plate on its periphery, and the second outer side wall is provided with a receiving groove corresponding to the first stiffening plate on its periphery. When the two boxes are assembled, the first stiffening plate of one of the boxes can be inserted into the receiving groove of the other box.

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