Enclosure assembly and electromagnetic release

Abstract

The application relates to a shell assembly and an electromagnetic release. The shell assembly comprises a shell and a seat body. The shell is provided with a containing cavity and an opening, the containing cavity is communicated with the opening, the shell is further provided with a clamping hole and a first plug-in groove, the first plug-in groove is arranged on one side of the clamping hole close to the containing cavity, and the first plug-in groove is communicated with the clamping hole. The seat body is arranged at the opening, the seat body is provided with a buckle piece, the buckle piece is arranged in the first plug-in groove and is clamped and matched with the clamping hole. Since the shell is provided with the first plug-in groove, the first plug-in groove is matched with the buckle piece, the clamping hole can be closed, external foreign matters can be blocked from entering the containing cavity through the clamping hole, the reliable attraction of the armature and the iron core is ensured, the release current of the electromagnetic release remains stable, and the misoperation of the electromagnetic release is avoided.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and in particular to a housing assembly and an electromagnetic trip unit. Background Technology

[0002] An electromagnetic trip unit is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches a specified requirement. The electromagnetic trip unit has an interactive relationship between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). It is commonly used in automated control circuits, playing roles such as automatic adjustment, safety protection, and circuit switching.

[0003] Typically, the outer casing of an electromagnetic trip unit has a snap-fit ​​hole, and the base has a snap-fit ​​buckle. The snap-fit ​​buckle engages with the snap-fit ​​hole to securely connect the outer casing and the base. However, foreign objects can easily enter the space formed by the outer casing and the base through the snap-fit ​​hole, and then transfer to the pole face of the iron core or the knife edge face of the yoke. This can lead to unreliable engagement between the armature and the iron core of the electromagnetic trip unit, resulting in a smaller tripping current and causing malfunction. Utility Model Content

[0004] Therefore, it is necessary to provide a housing assembly and an electromagnetic trip unit that can prevent external foreign objects from entering the receiving cavity through the snap-fit ​​hole and being transferred to the pole face of the iron core or the knife edge face of the yoke, ensuring reliable engagement between the armature and the iron core, keeping the tripping current of the electromagnetic trip unit stable, and preventing the electromagnetic trip unit from malfunctioning.

[0005] In a first aspect, this application provides a housing assembly, comprising:

[0006] A housing, the housing having a receiving cavity and an opening, the receiving cavity communicating with the opening, the housing also having a snap-fit ​​hole and a first insertion slot, the first insertion slot being located on the side of the snap-fit ​​hole near the receiving cavity, and the first insertion slot communicating with the snap-fit ​​hole; and

[0007] The seat is located at the opening and has a fastening element. The fastening element is located in the first insertion groove and engages with the fastening hole. The fastening element and the first insertion groove are used to prevent external foreign objects from entering the receiving cavity through the fastening hole.

[0008] In one embodiment, the first insertion groove is recessed in a direction away from the base body along a first direction of the housing. The first insertion groove has a first groove wall, a second groove wall, and a third groove wall. The first groove wall and the second groove wall are disposed opposite each other in a second direction of the housing. The first groove wall is disposed on the side of the second groove wall away from the receiving cavity. The snap-fit ​​hole is disposed in the first groove wall. The third groove wall is disposed between the first groove wall and the second groove wall. The first direction intersects the second direction.

[0009] The second groove wall is fitted to the seat body at one end face along the first direction and near the opening; or, the fastener is fitted to the third groove wall.

[0010] In one embodiment, the base body is further provided with a second insertion groove, the second insertion groove being recessed along the first direction in a direction away from the third groove wall, and the second groove wall being disposed within the second insertion groove.

[0011] In one embodiment, the second insertion slot has a fourth groove wall, which is disposed opposite to the opening of the second insertion slot, and the end face of the second groove wall along the first direction and close to the opening is fitted with the fourth groove wall.

[0012] In one embodiment, the second insertion slot further has a fifth slot wall, which is disposed opposite to the snap fastener and close to the receiving cavity;

[0013] The fifth groove wall is provided with a first inclined surface, and in the direction from the fourth groove wall to the opening of the second insertion groove, the first inclined surface is inclined in the direction away from the buckle.

[0014] The second groove wall has a second inclined surface that is adapted to the first inclined surface on the side facing the fifth groove wall. On the end of the second groove wall near the opening, the second inclined surface is inclined in the direction away from the opening.

[0015] In one embodiment, the snap-fit ​​hole has a first hole wall and a second hole wall, the first hole wall and the second hole wall being disposed opposite to each other in the first direction, the first hole wall being close to the opening;

[0016] The third groove wall is located on the side of the second hole wall opposite to the first hole wall; and / or, the fourth groove wall is located on the side of the first hole wall opposite to the second hole wall.

[0017] In one embodiment, the fastener includes a connecting arm and a fastening part. The connecting arm extends along a first direction of the housing, and one end of the connecting arm along the first direction is connected to the base. The connecting arm is disposed in the first insertion groove, and the fastening part is disposed on the side of the connecting arm facing the snap-fit ​​hole. The fastening part engages with the snap-fit ​​hole.

[0018] In one embodiment, the snap-fit ​​hole has a first hole wall near the opening, and the fastening portion has a fastening surface facing the first hole wall, the fastening surface being interference-fitted with the first hole wall.

[0019] In one embodiment, the snap-fit ​​hole further has a second hole wall, the first hole wall and the second hole wall are disposed opposite to each other in the first direction, the portion of the groove wall of the first insertion slot having the snap-fit ​​hole near the first hole wall abuts against the connecting arm, and the portion of the groove wall of the first insertion slot having the snap-fit ​​hole near the second hole wall abuts against the connecting arm.

[0020] In one embodiment, the seat body is further provided with a first adhesive notch and a second adhesive notch, the first adhesive notch and the second adhesive notch being located on opposite sides of the buckle.

[0021] In one embodiment, the periphery of the seat body, away from the accommodating cavity, forms a dotted adhesive groove with the inner wall of the housing, and the dotted adhesive groove is recessed toward the first insertion groove.

[0022] In one embodiment, at least two fasteners are provided, and the at least two fasteners are arranged opposite to each other;

[0023] Each of the snap-fit ​​holes and the first insertion slots is provided with at least two, and at least two snap-fit ​​members are provided in at least two of the first insertion slots, and are snap-fitted into at least two of the snap-fit ​​holes.

[0024] Secondly, this application also provides an electromagnetic trip unit, including the housing assembly described in any of the above claims.

[0025] In one embodiment, the electromagnetic trip unit further includes:

[0026] The magnetic circuit section is located within the outer casing assembly and includes a coil frame, an iron core, a yoke assembly, a magnet, and an armature. Both the coil frame and the iron core are mounted on the base. A coil is wound around the coil frame, and the coil frame has a central hole. At least a portion of the iron core is located within the central hole. The yoke is connected to the iron core, and the magnet is located between the iron core and the yoke and connected to the iron core. The yoke has a support, and the armature is movably connected to the support. One end of the armature mates with the pole face of the iron core.

[0027] An elastic element, wherein the elastic element is disposed within the housing assembly, one end of the elastic element is connected to the armature, and the other end of the elastic element is connected to the base; and

[0028] A pusher, at least a portion of which is disposed within the housing assembly, the pusher being disposed corresponding to the armature, the pusher being used to push the armature to move relative to the bracket.

[0029] During assembly of the aforementioned housing assembly and electromagnetic trip unit, the base and the opening of the housing are aligned. Pushing the base in the first direction causes the latching element to first enter the first insertion slot and then engage with the latching hole, thus achieving a fixed connection between the housing and the base. Because the housing has the first insertion slot, which engages with the latching element, it seals the latching hole. This prevents external foreign objects from entering the receiving cavity through the latching hole, preventing them from transferring to the pole face of the iron core or the knife edge face of the yoke. This ensures reliable engagement between the armature and the iron core, keeps the tripping current of the electromagnetic trip unit stable, and avoids malfunctions of the electromagnetic trip unit. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an electromagnetic trip device according to an embodiment of this application.

[0031] Figure 2 for Figure 1 The diagram shows the assembled structure of the electromagnetic trip unit's magnetic circuit, elastic element, and pusher.

[0032] Figure 3 This is an exploded view of the structure of a housing assembly according to an embodiment of this application.

[0033] Figure 4 for Figure 3 The cross-sectional view of the housing assembly shown.

[0034] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0035] Figure 6 This is a cross-sectional view of the housing of a housing assembly according to an embodiment of this application.

[0036] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle.

[0037] Figure 8 This is a cross-sectional view of the base of a housing assembly according to an embodiment of this application.

[0038] Figure 9 for Figure 8 A magnified view of a portion of point C.

[0039] Figure 10 This is a schematic diagram of the housing assembly of one embodiment of this application from another perspective.

[0040] Figure 11 This is a schematic diagram of the structure of the base of the housing assembly according to an embodiment of this application.

[0041] Explanation of icon numbers:

[0042] 10. Outer shell assembly; 11. Housing; 111. Receiving cavity; 112. Opening; 113. Snap-fit ​​hole; 1131. First hole wall; 1132. Second hole wall; 114. First insertion groove; 1141. First groove wall; 1142. Second groove wall; 11421. Second inclined part; 1143. Third groove wall; 12. Base; 121. Fastener; 1211. Connecting arm; 1212. Fastening part; 12121. Fastening surface; 122. Second insertion groove; 1221. Fourth groove wall; 1222, Fifth groove wall; 12221, First inclined surface; 123, Adhesive groove; 124, First adhesive notch; 125, Second adhesive notch; 20, Magnetic circuit section; 21, Coil frame; 211, Center hole; 22, Iron core; 221, First iron core section; 222, Second iron core section; 23, Yoke; 231, First yoke section; 232, Second yoke section; 233, Third yoke section; 2331, Support; 24, Magnet; 25, Armature; 30, Elastic element; 40, Pushing element. Detailed Implementation

[0043] 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.

[0044] See Figure 1 , Figure 2 and Figure 4An embodiment of this application provides an electromagnetic trip device, including a housing assembly 10 and a magnetic circuit portion 20. The housing assembly 10 includes a housing 11 and a base 12. The housing 11 has a receiving cavity 111 and an opening 112, and the receiving cavity 111 communicates with the opening 112. The base 12 is disposed at the opening 112 and is fixedly connected to the housing 11. The magnetic circuit portion 20 is disposed within the receiving cavity 111 and is fixedly connected to the base 12.

[0045] See Figure 2 The magnetic circuit part 20 includes a coil frame 21, an iron core 22, a yoke 23, a magnet 24, and an armature 25.

[0046] A coil frame 21 is disposed on the base 12, and a coil is wound around the coil frame 21. The coil frame 21 has a central hole 211, which penetrates the coil frame 21 along a first direction of the base 12. Here, X represents the first direction.

[0047] A core 22 is disposed on a base 12, with at least a portion of the core 22 disposed within a central hole 211. Specifically, the core 22 includes a first core portion 221 and a second core portion 222, which are connected to form an L-shape. The first core portion 221 extends along a second direction of the base 12 and is fixed to the base 12. The first direction intersects the second direction. Optionally, the first direction is perpendicular to the second direction, and the second direction is represented by Y. The second core portion 222 extends along the first direction, with at least a portion of the second core portion 222 disposed within the central hole 211. The end face of the second core portion 222 facing away from the first core portion 221 is the pole face of the core 22.

[0048] The yoke 23 is connected to the iron core 22. Specifically, the yoke 23 includes a first yoke part 231, a second yoke part 232, and a third yoke part 233. The first yoke part 231 is located within the space formed by the coil frame 21 and the iron core 22. The first yoke part 231 extends along a first direction and is fixedly connected to the second iron core part 222 by means of adhesive bonding or welding. The second yoke part 232 extends from the first yoke part 231 along a second direction away from the second iron core 22. The third yoke part 233 extends from the second yoke part 232 away from the base 12 and is provided with a bracket 2331.

[0049] The magnet 24 is disposed between the first iron core part 221 and the second yoke part 232. The magnet 24 is fixed to the first iron core part 221 by means of adhesive or welding.

[0050] The armature 25 is movably connected to the bracket 2331, and one end of the armature 25 mates with the pole face of the iron core 22. The electromagnetic trip device also includes an elastic element 30 and a pushing element 40. One end of the elastic element 30 is connected to the other end of the armature 25, and the other end of the elastic element 30 is connected to the base 12. The pushing element 40 is used to cooperate with the armature 25 to move the armature 25 relative to the bracket 2331.

[0051] In one embodiment, see Figure 1 and Figure 3 The housing 11 is provided with a snap-fit ​​hole 113, and the base 12 is provided with a snap-fit ​​member 121, which engages with the snap-fit ​​hole 113. Specifically, the snap-fit ​​hole 113 is located at the end of the housing 11 with an opening 112. By using the snap-fit ​​member 121 to engage with the snap-fit ​​hole 113, the housing 11 and the base 12 can be fixedly connected without auxiliary tooling, simplifying the assembly steps and improving assembly efficiency. Furthermore, by prying the snap-fit ​​member 121, the snap-fit ​​member 121 can be disengaged from the snap-fit ​​hole 113, allowing the housing 11 and the base 12 to be separated, thus ensuring the detachability of the outer casing assembly 10.

[0052] However, when the latching member 121 engages with the latching hole 113, foreign objects can easily enter the receiving cavity 111 through the latching hole 113 and then transfer to the pole face of the iron core 22 or the knife edge face of the yoke 23. This can cause the armature 25 of the electromagnetic trip device to be unreliably attracted to the iron core 22, resulting in a smaller tripping current of the electromagnetic trip device and making it prone to malfunction.

[0053] To solve the above problems, see Figure 4 and Figure 5 The housing 11 also has a first insertion groove 114. The first insertion groove 114 is located at one end of the housing 11 with an opening 112, and the first insertion groove 114 is recessed in a first direction away from the seat 12. The first insertion groove 114 is located on the side of the snap-fit ​​hole 113 near the receiving cavity 111 and communicates with the snap-fit ​​hole 113. The fastener 121 is located in the first insertion groove 114 and cooperates with the first insertion groove 114 to close the snap-fit ​​hole 113 to prevent foreign objects from entering the receiving cavity 111 through the snap-fit ​​hole 113.

[0054] During assembly, the base 12 and the opening 112 of the housing 11 are aligned. The base 12 is pushed along the first direction, causing the latching member 121 to first enter the first insertion groove 114 and then engage with the latching hole 113, thus achieving a fixed connection between the housing 11 and the base 12. Since the housing 11 is provided with the first insertion groove 114, the first insertion groove 114 and the latching member 121 can seal the latching hole 113. This can prevent external foreign objects from entering the receiving cavity 111 through the latching hole 113, and prevent external foreign objects from transferring to the pole face of the iron core 22 or the knife edge face of the yoke 23. This ensures that the armature 25 and the iron core 22 are reliably attracted, keeps the tripping current of the electromagnetic trip device stable, and avoids malfunction of the electromagnetic trip device.

[0055] In addition, during the assembly of the housing 11 and the base 12, the first insertion groove 114 can guide the buckle 121, prevent the buckle 121 from shaking, improve the stability of the buckle 121's movement, and thus ensure the reliability of the buckle 121's engagement with the buckle hole 113.

[0056] In one embodiment, see Figure 5 , Figure 8 and Figure 9 The fastener 121 includes a connecting arm 1211 and a fastening part 1212. One end of the connecting arm 1211 is connected to the base 12, and the connecting arm 1211 is disposed in the first insertion groove 114. The fastening part 1212 is disposed on the side of the connecting arm 1211 facing the fastening hole 113, and the fastening part 1212 engages with the fastening hole 113.

[0057] Further, see Figure 5 The snap-fit ​​hole 113 has a first hole wall 1131 near the opening 112. The fastening part 1212 has a fastening surface 12121 facing the first hole wall 1131, and the fastening surface 12121 is interference-fitted with the first hole wall 1131. During assembly, the fastening part 1212 is inserted into the snap-fit ​​hole 113, and the preload generated by the interference compression is used to lock the housing 11 and the seat 12, eliminating the springback gap of the fastening part 1212, improving the reliability of the fastening part 1212 and the snap-fit ​​hole 113, and preventing the housing 11 and the seat 12 from loosening.

[0058] In one embodiment, see Figure 5 , Figure 6 and Figure 7 The first insertion slot 114 has a first slot wall 1141, a second slot wall 1142, and a third slot wall 1143. The first slot wall 1141 and the second slot wall 1142 are arranged opposite to each other in a second direction. The first slot wall 1141 is located on the side of the second slot wall 1142 away from the receiving cavity 111, and the third slot wall 1143 is located between the first slot wall 1141 and the second slot wall 1142. It can be understood that the third slot wall 1143 is arranged opposite to the opening of the first insertion slot 114.

[0059] Further, see Figure 7 The snap-fit ​​hole 113 is located in the first groove wall 1141. Thus, the first groove wall 1141 provides a mounting position for the snap-fit ​​hole 113.

[0060] Optionally, see Figure 5 The second groove wall 1142 is in contact with the base 12 at one end face along the first direction and near the opening 112. This arrangement can prevent external foreign objects from entering the receiving cavity 111 through the snap-fit ​​hole 113, and prevent external foreign objects from transferring to the pole face of the iron core 22 or the knife edge face of the yoke 23, thereby ensuring that the armature 25 and the iron core 22 are reliably attracted, so that the tripping current of the electromagnetic trip device remains stable and the electromagnetic trip device is prevented from malfunctioning.

[0061] Of course, in other embodiments, the latching member 121 is fitted against the third groove wall 1143. This arrangement also prevents external foreign objects from entering the receiving cavity 111 through the latching hole 113, preventing them from transferring to the pole face of the iron core 22 or the knife edge face of the yoke 23. This ensures reliable engagement between the armature 25 and the iron core 22, keeps the tripping current of the electromagnetic trip device stable, and avoids malfunctions of the electromagnetic trip device.

[0062] In one embodiment, see Figure 7 The snap-fit ​​hole 113 also has a second hole wall 1132, and the first hole wall 1131 and the second hole wall 1132 are disposed opposite each other in a first direction. The third groove wall 1143 is disposed on the side of the second hole wall 1132 away from the first hole wall 1131.

[0063] Further, see Figure 5 The portion of the first groove wall 1141 near the first hole wall 1131 abuts against the connecting arm 1211, and the portion of the first groove wall 1141 near the second hole wall 1132 abuts against the connecting arm 1211. This arrangement serves as an auxiliary seal, thereby preventing external foreign objects from entering the receiving cavity 111 through the snap-fit ​​hole 113.

[0064] In one embodiment, see Figure 5 and Figure 8 The base 12 is also provided with a second insertion groove 122, which is recessed in the first direction away from the third groove wall 1143. The second groove wall 1142 is located inside the second insertion groove 122.

[0065] Furthermore, the second insertion slot 122 has a fourth slot wall 1221, which is disposed opposite to the opening of the second insertion slot 122. The end face of the second slot wall 1142 along the first direction and close to the opening 112 is fitted with the fourth slot wall 1221. In this way, the connection part of the fastener 121 can be sealed, isolating external foreign objects and plastic debris generated during assembly, that is, preventing external foreign objects and plastic debris generated during assembly from entering the receiving cavity 111, preventing external foreign objects from transferring to the pole face of the iron core 22 or the knife edge face of the yoke 23, thereby ensuring that the armature 25 and the iron core 22 are reliably attracted, so that the tripping current of the electromagnetic trip device remains stable and avoids the electromagnetic trip device from malfunctioning.

[0066] Specifically, in this embodiment, the fourth groove wall 1221 is located on the side of the first hole wall 1131 that is away from the second hole wall 1132.

[0067] In one embodiment, see Figure 5 and Figure 9 The second insertion slot 122 also has a fifth slot wall 1222. The fifth slot wall 1222 is disposed opposite to the fastener 121 and is disposed close to the receiving cavity 111.

[0068] Further, see Figure 5 and Figure 9 The fifth groove wall 1222 is provided with a first inclined surface 12221. In the direction from the fourth groove wall 1221 to the opening of the second insertion groove 122, the first inclined surface 12221 is inclined away from the snap fastener 121. The second groove wall 1142 is provided with a second inclined surface 11421 on the side facing the fifth groove wall 1222. On the end face of the second groove wall 1142 near the opening 112, in the direction away from the opening 112, the second inclined surface 11421 is inclined away from the snap fastener 121. The first inclined surface 12221 and the second inclined surface 11421 are adapted to each other. Thus, with the cooperation of the first inclined surface 12221 and the second inclined surface 11421, a self-aligning function can be achieved, ensuring that the snap fastener 121 is aligned with the snap-fit ​​hole 113 and can be quickly snapped in place. In addition, under the action of the first inclined surface 12221 and the second inclined surface 11421, plastic debris can be scraped into the second insertion groove 122, preventing plastic debris from being carried into the snap-fit ​​hole 113 and causing loose connection or abnormal noise.

[0069] In one embodiment, see Figure 10 and Figure 11The seat 12 is also provided with a first adhesive notch 124 and a second adhesive notch 125. The first adhesive notch 124 and the second adhesive notch 125 are located on opposite sides of the fastener 121. When the seat 12 is fastened to the snap-fit ​​hole 113 of the housing 11 through the fastener 121, adhesive can be applied through the first adhesive notch 124 and the second adhesive notch 125, allowing the adhesive to flow and seep into the first insertion groove 114. This allows the first insertion groove 114 and the fastener 121 to be fixed and sealed by adhesive application, further preventing foreign objects from entering the receiving cavity 111.

[0070] In one embodiment, see Figure 11 The periphery of the seat 12, facing away from the receiving cavity 111, forms a dispensing groove 123 with the inner wall of the housing 11. Specifically, the dispensing groove 123 is recessed towards the first insertion groove 114, and corresponds to the side wall of the housing 11. With this arrangement, by dispensing adhesive into the dispensing groove 123, the periphery of the seat 12 and the inner wall of the housing 11 can be sealed, thus isolating external foreign objects from the receiving cavity 111 and preventing external foreign objects from entering the receiving cavity 111 through the gap between the housing 11 and the seat 12.

[0071] In one embodiment, the base 12 is provided with at least two latching members 121, which are arranged opposite to each other.

[0072] Furthermore, each of the snap-fit ​​holes 113 and the first insertion slots 114 is provided with at least two, and at least two snap fasteners 121 are correspondingly provided in at least two of the first insertion slots 114, and are snap-fitted into each of the at least two snap-fit ​​holes 113. In this way, the reliability of the connection between the housing 11 and the base 12 can be improved.

[0073] Specifically, in this embodiment, the housing 11 has a snap-fit ​​hole 113 and a first insertion groove 114 at the middle of the two opposite long sides, and the base 12 has a snap-fit ​​member 121 at the middle of the two opposite long sides.

[0074] Of course, in other embodiments, the housing 11 has a snap-fit ​​hole 113 and a first insertion groove 114 at the middle of the two opposite short sides, and the base 12 has a snap-fit ​​member 121 at the middle of the two opposite short sides.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 housing assembly, characterized in that, include: A housing, the housing having a receiving cavity and an opening, the receiving cavity communicating with the opening, the housing also having a snap-fit ​​hole and a first insertion slot, the first insertion slot being located on the side of the snap-fit ​​hole near the receiving cavity, and the first insertion slot communicating with the snap-fit ​​hole; and The seat is located at the opening and has a fastening element. The fastening element is located in the first insertion groove and engages with the fastening hole. The fastening element and the first insertion groove are used to prevent external foreign objects from entering the receiving cavity through the fastening hole.

2. The housing assembly according to claim 1, characterized in that, The first insertion groove is recessed in the direction away from the base body along the first direction of the housing. The first insertion groove has a first groove wall, a second groove wall and a third groove wall. The first groove wall and the second groove wall are arranged opposite to each other in the second direction of the housing. The first groove wall is located on the side of the second groove wall away from the receiving cavity. The snap-fit ​​hole is located in the first groove wall. The third groove wall is located between the first groove wall and the second groove wall. The first direction intersects the second direction. The second groove wall is fitted to the seat body at one end face along the first direction and near the opening; or, the fastener is fitted to the third groove wall.

3. The housing assembly according to claim 2, characterized in that, The base body is also provided with a second insertion groove, which is recessed along the first direction in a direction away from the third groove wall, and the second groove wall is located inside the second insertion groove.

4. The housing assembly according to claim 3, characterized in that, The second insertion slot has a fourth groove wall, which is disposed opposite to the opening of the second insertion slot, and the end face of the second groove wall along the first direction and close to the opening is in contact with the fourth groove wall.

5. The housing assembly according to claim 4, characterized in that, The second insertion slot also has a fifth slot wall, which is disposed opposite to the fastener and close to the receiving cavity; The fifth groove wall is provided with a first inclined surface, and in the direction from the fourth groove wall to the opening of the second insertion groove, the first inclined surface is inclined in the direction away from the buckle. The second groove wall has a second inclined surface that is adapted to the first inclined surface on the side facing the fifth groove wall. On the end of the second groove wall near the opening, the second inclined surface is inclined in the direction away from the opening.

6. The housing assembly according to claim 4, characterized in that, The snap-fit ​​hole has a first hole wall and a second hole wall, the first hole wall and the second hole wall are disposed opposite to each other in the first direction, and the first hole wall is close to the opening; The third groove wall is located on the side of the second hole wall opposite to the first hole wall; and / or, the fourth groove wall is located on the side of the first hole wall opposite to the second hole wall.

7. The housing assembly according to claim 1, characterized in that, The fastener includes a connecting arm and a fastening part. The connecting arm extends along a first direction of the housing. One end of the connecting arm along the first direction is connected to the base. The connecting arm is disposed in the first insertion groove. The fastening part is disposed on the side of the connecting arm facing the snap-fit ​​hole. The fastening part engages with the snap-fit ​​hole.

8. The housing assembly according to claim 7, characterized in that, The snap-fit ​​hole has a first hole wall near the opening, and the fastening part has a fastening surface facing the first hole wall, the fastening surface being interference-fitted with the first hole wall.

9. The housing assembly according to claim 8, characterized in that, The snap-fit ​​hole also has a second hole wall. The first hole wall and the second hole wall are arranged opposite to each other in the first direction. The portion of the groove wall of the first insertion slot with the snap-fit ​​hole near the first hole wall abuts against the connecting arm. The portion of the groove wall of the first insertion slot with the snap-fit ​​hole near the second hole wall abuts against the connecting arm.

10. The housing assembly according to any one of claims 1 to 9, characterized in that, The base body is also provided with a first adhesive notch and a second adhesive notch, which are located on opposite sides of the buckle.

11. The housing assembly according to any one of claims 1 to 9, characterized in that, The periphery of the seat body, away from the accommodating cavity, forms a dotted adhesive groove with the inner wall of the housing, and the dotted adhesive groove is recessed towards the first insertion groove.

12. The housing assembly according to any one of claims 1 to 9, characterized in that, The fastener is provided in at least two parts, and the at least two fasteners are arranged opposite to each other; Each of the snap-fit ​​holes and the first insertion slots is provided with at least two, and at least two snap-fit ​​members are provided in at least two of the first insertion slots, and are snap-fitted into at least two of the snap-fit ​​holes.

13. An electromagnetic trip device, characterized in that, Includes the housing assembly as described in any one of claims 1 to 12.

14. The electromagnetic trip unit according to claim 13, characterized in that, The electromagnetic trip unit also includes: The magnetic circuit section is located within the outer casing assembly and includes a coil frame, an iron core, a yoke assembly, a magnet, and an armature. Both the coil frame and the iron core are mounted on the base. A coil is wound around the coil frame, and the coil frame has a central hole. At least a portion of the iron core is located within the central hole. The yoke is connected to the iron core, and the magnet is located between the iron core and the yoke and connected to the iron core. The yoke has a support, and the armature is movably connected to the support. One end of the armature mates with the pole face of the iron core. An elastic element, wherein the elastic element is disposed within the housing assembly, one end of the elastic element is connected to the armature, and the other end of the elastic element is connected to the base; and A pusher, at least a portion of which is disposed within the housing assembly, the pusher being disposed corresponding to the armature, the pusher being used to push the armature to move relative to the bracket.

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