Housing assembly and electrical switching device, in particular contactor or relay

Abstract

The invention relates to a housing assembly (1) for a contactor (8), the housing assembly (1) comprising a frame (4) made of a ferromagnetic material, the frame (4) surrounding a contact chamber (16) for separable contacts (18) of the contactor (8), and an enclosure (6) made of an insulating material, the enclosure (6) at least partially enclosing the frame (4) internally and externally, the enclosure (6) comprises at least one pocket (52) for receiving a blow-out magnet (50) of the contactor (8), in which the frame (4) is at least partially exposed for contact in said at least one pocket (52). The frame (4) improves the mechanical stability of the housing assembly (1) and provides a suitable path for conducting the magnetic flux from the blow-out magnet (50). The invention further relates to an electrical switching device (2) having such a housing assembly (1).

Description

Technical Field

[0001] The invention relates to a housing assembly for an electrical switching device such as a contactor or a relay. Furthermore, the invention relates to an electrical switching device, in particular a contactor or a relay for high voltage automotive applications. However, the applicability of the invention also extends to other fields of electrical engineering. Background Art

[0002] Typically, electrical switching devices, such as contactors and relays, are used in the field of electrical engineering to close or open electrical circuits. The aim is to influence a relatively strong current flow with a relatively weak control current. In particular, the control current is used to move separable contacts that conduct strong currents together or apart.

[0003] Especially in high-voltage applications, interrupting high currents can lead to arc discharges. That is, arc discharges occur between the separable contacts, which can lead to component damage such as conductor melting, insulation breakdown and fire. In order to extinguish the arc discharge quickly, so-called blow-out magnets are usually arranged near the separable contacts. These blow-out magnets are intended to generate a magnetic force that stretches and ultimately interrupts the arc discharge.

[0004] However, even with this or other kinds of arc extinguishing techniques, an electrical explosion, commonly known as an arc flash, may occasionally occur and cause the electrical switching device to burst. For example, a short circuit in a circuit of a high voltage application may cause an excessive current to flow. The resulting short circuit current generally causes a strong repulsive force between the separable contacts. If the repulsive force manages to move the separable contacts away from each other, the resulting arc discharge results in the generation of extremely high pressures and the above-mentioned arc flash. This represents a danger to people and equipment that needs to be prevented. Summary of the invention

[0005] Technical goals to be achieved

[0006] It is therefore an object of the present invention to improve contactors and other electrical switching devices with respect to safety and reliability.

[0007] This object is achieved by a housing assembly of the above type, wherein the housing assembly comprises a frame and an enclosure, the frame being made of a ferromagnetic material, the frame surrounding a contact chamber for a separable contact of a contactor, the enclosure being made of an insulating material, the enclosure at least partially enclosing the frame internally and externally. The enclosure may also be referred to as an enclosure component or a shell. The enclosure comprises at least one recess for receiving a blow-out magnet of a contactor, wherein the frame is at least partially exposed in the at least one recess for contacting.

[0008] The above solution is advantageous for at least two reasons:

[0009] First, the frame provides a mechanical reinforcement structure for the entire housing assembly. Therefore, if the housing assembly according to the present invention is used in a contactor or other type of electrical switching device, and an arc flash occasionally occurs, the frame can effectively prevent or at least mitigate the bursting of the housing assembly. In particular, the housing assembly provides increased safety in the event of a short circuit.

[0010] Secondly, the ferromagnetic material of the frame exhibits a low magnetic resistance compared to the air, plastic or ceramic that usually surrounds the blow-out magnet in a conventional switch. Therefore, in the present invention, when the blow-out magnet is received in the at least one recess, the frame provides a suitable path for conducting the magnetic flux from the blow-out magnet. To this end, the frame is exposed for contact by the blow-out magnet in the at least one recess. In other words, due to its exposure, the frame is accessible to the blow-out magnet in the at least one recess.

[0011] This allows the magnetic field of the blown magnet to propagate better in the contact chamber. The result is improved arc extinguishing and shortened arc discharge, which contributes to safe and reliable operation of any electrical switching device employing the housing assembly according to the invention.

[0012] The invention can be further developed by the following examples, which are advantageous per se and can be combined with one another as desired.

[0013] According to a possible embodiment, the at least one recess may abut the frame. In other words, a portion of the frame may define one side of the recess. This results in a compact structure, since the at least one recess and the frame are directly adjacent to each other.

[0014] Alternatively, the dividing wall may at least partially separate the frame from the at least one recess. In this case, the dividing wall preferably comprises an access window through which the frame is exposed for contact by the blow-out magnet. Optionally, the frame and / or the blow-out magnet may comprise a protrusion that can pass through the access window. The access window allows the contact between the frame and the blow-out magnet to be concentrated to a specific position suitable for the respective application.

[0015] According to another embodiment that is easy to manufacture, the frame can have a polyhedral shape with at least one side open. For example, the frame can have an open box shape formed by five mutually perpendicular rectangular faces. Thus, the frame can be a deep drawn metal part. Alternatively, the frame can be a stamped and bent part, a forged part, a die cast part or a 3D printed part.

[0016] The at least one recess and the contact chamber may both be open towards the same side. In particular, the at least one recess and the contact chamber may be open towards the same side as the polyhedral-shaped frame. This facilitates the assembly process of the switchgear, wherein the blow-out magnet is received in the at least one recess and the separable contact is arranged in the contact chamber. Both assembly steps may be performed from the same direction without the need to rotate or tilt the housing assembly.

[0017] According to another embodiment, the housing assembly may include a cover for only partially closing the contact chamber and the at least one recess. That is, the cover may have at least one relatively small opening through which the contact chamber communicates with the environment of the housing assembly. The size of the opening is selected such that the pressure equalization between the interior and the exterior of the contact chamber is decelerated through the opening. Thus, when an arc discharge occurs, the high pressure generated is temporarily maintained in the contact chamber. Maintaining the high pressure for the duration of the arc discharge helps to extinguish the arc.

[0018] Optionally, at least one edge of the frame may protrude from the enclosure. Furthermore, the housing assembly may include a base plate which may be welded to the at least one protruding edge of the frame. Preferably, the at least one protruding edge of the frame surrounds the contact chamber and the at least one recess. Accordingly, the base plate may be welded to the at least one edge. The above-mentioned cover may be positioned between the frame and the base plate. Thus, the base plate may mechanically reinforce the cover in the same way that the frame reinforces the enclosure.

[0019] Alternatively, if no separate cover or base plate is provided, the housing assembly may be welded directly to, for example, a housing of an actuator, such as a solenoid or any other type of coil assembly.

[0020] According to another embodiment, the enclosure may include an inner wall lining the contact chamber on the inside and an outer wall surrounding the frame on the outside, wherein the frame is positioned between the inner wall and the outer wall. In other words, the frame is sandwiched between the inner wall and the outer wall. Thus, the frame can be effectively insulated from the separable contacts in the contact chamber and at the same time provided with external touch protection.

[0021] In order to simplify the handling of the housing assembly, the frame and the enclosure may together form a monolithic structure. In particular, no additional separate components are required, since in this embodiment the frame and the enclosure are a single unit. For example, the inner wall and the outer wall may be overmolded on the frame. Thus, the inner wall is implemented by an inner layer of insulating material, while the outer wall is implemented by an outer layer of insulating material.

[0022] Optionally, the frame may include at least one feedthrough hole leading to the contact chamber. During the overmolding process, a material accumulation of insulating material may be produced in the at least one feedthrough hole, which connects the inner layer to the outer layer. This increases the cohesion between the frame and the encapsulation.

[0023] Alternatively, the inner wall and the outer wall can be prefabricated elements mounted on the frame. In particular, the prefabricated elements can be prefabricated from insulating material. This embodiment allows easier maintenance because the prefabricated elements can be replaced when necessary.

[0024] It is also conceivable that only the inner wall or the outer wall is a prefabricated element mounted on the frame, while the respective other wall is overmoulded on the frame.

[0025] The above-mentioned partition wall can be part of the encapsulation.In addition, the partition wall can also be realized by a prefabricated element installed between the frame and the blow-out magnet or by a partition layer of insulating material injected between the frame and the blow-out magnet.

[0026] According to another embodiment, the at least one recess may be formed by an inner wall. Thus, the frame may surround the blow-out magnet received in the at least one recess. Thus, the frame may serve at least to some extent as a shield for the magnetic field of the blow-out magnet.

[0027] Preferably, the enclosure may include at least two recesses in order to increase the number of blow-out magnets that can be received by the housing assembly. This in turn improves the arc extinguishing capability.

[0028] Alternatively, the at least two recesses may be arranged opposite each other with respect to the contact chamber. In other words, the contact chamber may be located between the at least two recesses. Thus, the blow-out magnets may be arranged on at least two opposite sides of the contact chamber, thereby improving their arc extinguishing effect.

[0029] The purpose defined in the introduction can also be met by an electrical switching device, in particular a contactor, such as a DC contactor or an AC contactor, or a relay, wherein the switching device comprises a housing assembly according to any of the above-mentioned embodiments, a contact assembly having separable contacts located in a contact chamber of the housing assembly, and at least one blow-out magnet located in at least one recess of the enclosure and in direct contact with the frame.

[0030] The switchgear benefits from the technical effects and advantages of the housing assembly as described above. In particular, due to the presence of the housing assembly, the safety and reliability of the switchgear are improved.

[0031] According to one possible embodiment, the at least one blow-out magnet can be a permanent magnet and the magnetic flux of the at least one blow-out magnet can be conducted through the frame. In addition to improving the propagation of the magnetic field into the contact chamber, this embodiment is also advantageous because no separate fixing means for the at least one blow-out magnet is required. The magnetic attraction between the permanent magnet and the ferromagnetic frame automatically assumes the fixing function. Preferably, one blow-out magnet is provided for each recess of the housing assembly.

[0032] Furthermore, the back side and / or the lateral side of each blow-out magnet facing away from the contact chamber can be in direct contact with the frame. If two blow-out magnets are provided, the back side and / or the lateral side face away from the respective other blow-out magnet when the blow-out magnets are arranged on opposite sides relative to the contact assembly. This results in a so-called magnetic re-coupling of the blow-out magnets, which connects the respective back side and / or the lateral side via the frame.

[0033] Alternatively, the switch device may include a coil assembly for actuating the contact assembly. The housing assembly and the contact assembly may be arranged on the coil assembly. A plunger of the coil assembly may extend into the housing assembly. The plunger may transfer the actuation force and the resulting actuation movement from the coil assembly to the separable contacts of the contact assembly. Alternatively, manual actuation may also be utilized.

[0034] Furthermore, the switchgear may optionally be configured with a plurality of connection sections. A power cable may be provided for each connection section, and the power cable may be fastened to and contacted on the associated connection section. In particular, the switchgear may comprise a plurality of fastening elements, contact elements and / or current-carrying elements at the connection sections. The connection sections are interconnected via contact assemblies and their separable contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The invention will be explained in more detail below by way of example with reference to the accompanying drawings. The feature combinations shown in the embodiments shown by way of example can be supplemented by further features corresponding to the properties of the invention required for a specific application according to the above statements. If the effect of a feature is not relevant to a specific application, then according to the above statements, individual features can also be omitted from the described embodiments. The same reference numerals in the drawings are always used for elements having the same function and / or the same structure.

[0036] Figure 1 shows a schematic perspective view of a housing assembly according to an exemplary embodiment;

[0037] Figure 2 Shows Figure 1 Another schematic perspective view of a housing assembly of ;

[0038] Figure 3 shows a schematic perspective view of a housing assembly according to another exemplary embodiment in exploded cross-sectional view;

[0039] Figure 4 shows a schematic cross-sectional side view of an electrical switching apparatus according to an exemplary embodiment;

[0040] Figure 5 shows a schematic cross-sectional side view of a housing assembly according to another exemplary embodiment;

[0041] Figure 6 shows a schematic exploded cross-sectional side view of a housing assembly according to another exemplary embodiment;

[0042] Figure 7 A schematic perspective view showing a frame and a base plate of a housing assembly according to another exemplary embodiment; and

[0043] Figure 8 Shows Figure 5 Another schematic cross-sectional view of the frame and base plate. DETAILED DESCRIPTION

[0044] In the following, reference will be made to Figures 1 to 8 The schematic structures of the housing assembly 1 and the electrical switching device 2 according to the present invention are explained.

[0045] from Figure 1 and Figure 2 As can be seen in the schematic perspective view of , the housing assembly 1 comprises a frame 4 and an encapsulation 6, which at least partially encapsulates the frame 4 internally and externally. The encapsulation 6 can also be referred to as an encapsulation component or a shell.

[0046] The housing assembly 1 is intended for use with an electrical switching device 2, which may be, for example, an enclosure 6 or a relay 10. As will be described in further detail below, the housing assembly 1 may help increase the safety and reliability of the electrical switching device 2.

[0047] In particular, the frame 4 provides a mechanical reinforcement structure for the entire housing assembly 1. That is, the frame 4 is made of a ferromagnetic material, in particular a ferromagnetic metal. For example, the frame 4 can be a deep-drawn metal part 12 (see Figure 6 ). Alternatively, the frame 4 may be a stamped and bent part, a forged part, a die-cast part, or a 3D printed part.

[0048] In the embodiment shown, the frame 4 has the shape of an open box formed by five mutually perpendicular rectangular faces 14 (see Figure 7 ). More generally, the frame 4 may have a polyhedral shape, in which at least one side is open. With its shape, the frame 4 surrounds the contact chambers 16 for the separable contacts 18 of the contact assembly 20 of the switch device 2.

[0049] The separable contact 18 may include at least one fixed contact 22 and at least one movable contact 24, both of which exhibit high conductivity. For example, the movable contact 24 may be a contact bridge 26 spanning between two fixed contacts 22, which are arranged in the contact chamber 16 (see Figure 4 ).

[0050] The switch device 2 may include a coil assembly 28 for actuating the contact bridge 26. The housing assembly 1 and the contact assembly 20 may be arranged on the coil assembly 28. A plunger 30 of the coil assembly 28 may extend into the housing assembly 1. The plunger 30 may transfer the actuation force and the resulting actuation movement from the coil assembly 28 to the contact bridge 26. Alternatively, manual actuation may also be utilized.

[0051] The enclosure 6 separates the frame 4 from the contact chamber 16. For this purpose, the enclosure 6 is made of an insulating material and can include an inner wall 32 which lines the contact chamber 16 internally. In particular, the inner wall 32 can be implemented by an inner layer 34 of insulating material overmolded onto the frame 4 (see Figure 5 ).

[0052] In addition, the encapsulation 6 can provide external touch protection. Thus, the encapsulation 6 can include an outer wall 36, which surrounds the frame 4 on the outside. Thus, the outer wall 36 can be implemented by an outer layer 38 of insulating material. Likewise, the outer layer 38 can be overmolded on the frame 4 (see Figure 5 ).

[0053] In other words, both the inner wall 32 and the outer wall 36 may be overmolded onto the frame 4. Thus, the frame 4 and the enclosure 6 may form a single-piece structure 40. Optionally, the frame 4 may include at least one feedthrough hole 42 leading to the contact chamber 16. During the overmolding process, a material accumulation 44 of insulating material may fill the at least one feedthrough hole 42, connecting the inner layer 34 with the outer layer 38.

[0054] according to Figure 6 In the alternative embodiment shown, the inner wall 32 can be a prefabricated element 46 mounted on the frame 4. Likewise, the outer wall 36 can also be a prefabricated element 48 mounted on the frame 4. Here, the frame 4 is positioned between the inner wall 32 and the outer wall 36, in particular sandwiched between the inner wall 32 and the outer wall 36.

[0055] The ferromagnetic properties of the frame 4 can be further utilized in combination with the blow-out magnets 50 of the switchgear 2. These blow-out magnets 50 are arranged near the separable contacts 18 in order to quickly extinguish the arc discharge occurring between the fixed contacts 22 and the movable contacts 24. In particular, the blow-out magnets 50 generate a magnetic force that stretches and eventually interrupts the arc discharge.

[0056] The frame 4 provides a suitable path for conducting the magnetic flux from the blow-out magnet because it exhibits a low magnetic resistance compared to the air, plastic or ceramic that typically surrounds the blow-out magnet in a conventional switch (not shown). This allows the magnetic field of the blow-out magnet 50 to propagate better in the contact chamber 16 and helps extinguish the arc discharge.

[0057] In order to accommodate the blow-out magnets 50 of the switch device 2, the enclosure 6 comprises a recess 52 for each blow-out magnet 50. The frame 4 is at least partially exposed in these recesses 52 for contact with the corresponding blow-out magnet 50. In other words, due to the exposure, the frame 4 is accessible to the blow-out magnet 50 in the corresponding recess 52.

[0058] As in Figure 2 As can be seen in the figure, the recesses 52 can be adjacent to the frame 4. That is, a section 54 of the frame 4 can define one side of each recess 52. Alternatively, a partition wall (not shown) can at least partially separate the frame 4 from the corresponding recess 52. In this case, the partition wall preferably includes an access window through which the frame is exposed for contact by the blow-out magnet. Optionally, the frame and / or the blow-out magnet can include a protrusion that passes through the access window.

[0059] As in Figure 2 As can be further seen in the figure, the recess 52 and the contact chamber 16 can be opened to the same side. In particular, the recess 52 and the contact chamber 16 can be opened to the same side as the frame 4.

[0060] Preferably, the recess 52 may be formed by the inner wall 32 (see Figure 6 ). Thus, the frame 4 can surround the blow-out magnets 50 received in the corresponding recesses 52, such as Figure 4 Furthermore, the recesses 52 can be arranged opposite to each other with respect to the contact chamber 16. In other words, the contact chamber 16 can be located between the recesses 52. Thus, the blow-out magnet 50 can be arranged on two opposite sides of the contact chamber 16.

[0061] In order to close the contact chamber 16 and the recess 52, the housing assembly 1 may include a cover 56 (see Figure 3 ). The cover 56 may be configured to cover a large portion of the contact chamber 16 and the recess 52. Furthermore, the cover 56 may have at least one opening 58 through which the contact chamber 16 communicates with the environment of the housing assembly 1. The dimensions of the at least one opening 58 are selected such that the pressure equalization between the interior and the exterior of the contact chamber 16 is decelerated.

[0062] The above-mentioned plunger 30 of the coil assembly 28 can reach into the contact chamber 16 through the opening 58 of the cover 56 and is connected to the contact bridge 26 in a force- and displacement-transmitting manner (see Figure 4 ). Thus, the actuation force originating from the coil assembly 28 can be transmitted via the plunger 30 and move the contact bridge 26. If a plurality of contact bridges are provided, the plunger 30 of the coil assembly 28 can be connected to at least one of these contact bridges.

[0063] The cover 56 may be a prefabricated element 60 mounted to the frame 4 and / or the enclosure 6. Preferably, the cover 56 is made of an insulating material. As a structural reinforcement for the cover 56, the housing assembly 1 may include a substrate 62 made of a ferromagnetic material, in particular a ferromagnetic metal. The substrate 62 may be mounted to the frame 4 and / or the enclosure 6. The cover 56 may be positioned between the frame 4 and the substrate 62.

[0064] Optionally, at least one edge 64 of the frame 4 may protrude from the enclosure 6 (see Figure 2 ). In this embodiment, the substrate 62 can be welded to the protruding edge 64 of the frame 4. Preferably, the protruding edge 64 of the frame 4 surrounds the contact chamber 16 and the recess 52. Accordingly, the substrate 62 can be welded to the protruding edge 64 along the entire periphery of the contact chamber 16 and the recess 52. Therefore, the frame 4 and the substrate 62 together form a highly pressure-resistant structure.

[0065] In an alternative embodiment not shown in the figures, the housing assembly 1 may be welded directly to, for example, the housing of an actuator, such as a solenoid or other type of coil assembly. In this way, it is not necessary to provide a separate cover or base plate.

[0066] Other ways of attaching the frame 4 to the base plate 62 or housing of the actuator may include bending, pressing, riveting, screwing, gluing, and the like techniques for establishing a rigid connection.

[0067] As described above, the switch device 2 includes the housing assembly 1 , the contact assembly 20 having the separable contacts 18 located in the contact chamber 16 of the housing assembly 1 , and the blow-out magnet 50 located in the recess 52 of the enclosure 6 .

[0068] The blow-out magnets 50 are in direct contact with the frame 4. In particular, the back side 66 of each blow-out magnet 50 facing away from the contact chamber 16 can be in direct contact with the frame 4. Additionally or alternatively, the lateral side 68 of each blow-out magnet 50 can be in direct contact with the frame 4. Preferably, the blow-out magnets 50 can be permanent magnets 70, and their respective magnetic flux can be conducted through the frame 4.

[0069] The substrate 62 may be positioned between the contact chamber 16 and the coil assembly 28 (see Figure 4 As described above, the substrate 62 has ferromagnetic properties. This allows the substrate 62 to conduct magnetic flux originating from the coil assembly 28, which improves the operation of the coil assembly 28.

[0070] like Figure 4As further shown in the figure, the switchgear 2 can optionally be configured with a plurality of connection sections 72. A power cable (not shown) can be provided for each connection section 72 and fastened thereto. For this purpose, a fastening element (not shown) can be present on each connection section 72. Alternatively, each power cable can be welded or brazed to the connection section 72.

[0071] The connecting section 72 may extend through the outer wall 36, the frame 4 and the inner wall 32 into the contact chamber 16 (see Figure 4 For this purpose, suitable holes 74 may be provided in the outer wall 36, the frame 4 and / or the inner wall 32 (see Figure 6 ).

[0072] The end 76 of the connecting section 72 extending into the contact chamber 16 can be used as the above-mentioned fixed contact 22. These fixed contacts 22 can be interconnected via the contact bridge 26. When the contact bridge 26 is moved away from the fixed contact 22 by means of the coil assembly, the interconnection is interrupted. Any arc discharge that occurs during the separation process is quenched by means of the blow-out magnet 50.

[0073] The electrical switching device 2, shown as an enclosure 6, may be a DC contactor or an AC contactor. Alternatively, the invention may also be used for a relay 10 or a similar electrical switch.

[0074] Reference numerals

[0075] 1 Shell assembly

[0076] 2 Switchgear

[0077] 4 Framework

[0078] 6 Encapsulation

[0079] 8 Contactor

[0080] 10 Relay

[0081] 12 Components

[0082] 14 sides

[0083] 16 Contact Room

[0084] 18 Separable contacts

[0085] 20 Contact assembly

[0086] 22 Fixed contacts

[0087] 24 Movable contacts

[0088] 26 Contact bridge

[0089] 28 Coil assembly

[0090] 30 Plunger

[0091] 32 Inner wall

[0092] 34 Inner layer

[0093] 36 outer wall

[0094] 38 Outer layer

[0095] 40 Monomer structure

[0096] 42 Feedthrough holes

[0097] 44 Material accumulation department

[0098] 46 Prefabricated elements

[0099] 48 Prefabricated elements

[0100] 50 Blow out magnet

[0101] 52 Concave

[0102] 54 Sections

[0103] 56 Cover

[0104] 58 Opening

[0105] 60 Prefabricated elements

[0106] 62 substrate

[0107] 64 Edge

[0108] 66 dorsal

[0109] 68 side to side

[0110] 70 permanent magnet

[0111] 72 Connection section

[0112] 74 Holes

[0113] 76 end

Claims

1. A housing assembly (1) for a contactor (8), wherein: The housing assembly (1) comprises: - a frame (4) made of ferromagnetic material surrounding a contact chamber (16) for a separable contact (18) of the contactor (8), and - an envelope (6) made of insulating material, at least partially enclosing the frame (4) internally and externally, wherein the enclosure (6) comprises at least one recess (52) for receiving a blow-out magnet (50) of the contactor (8), The frame (4) is at least partially exposed in the at least one recess (52) for contact.

2. The housing assembly (1) according to claim 1, wherein: The at least one recess (52) adjoins the frame (4).

3. The housing assembly (1) according to claim 1 or 2, wherein: The frame (4) has a polyhedral shape, wherein at least one face of the polyhedral shape is open.

4. The housing assembly (1) according to any one of claims 1 to 3, wherein: The housing assembly (1) comprises a cover (56) for only partially closing the contact chamber (16).

5. The housing assembly (1) according to any one of claims 1 to 4, wherein: At least one edge (64) of the frame (4) protrudes from the enclosure (6), and wherein the housing assembly (1) comprises a base plate (62) which can be welded to the at least one edge (64) of the frame (4).

6. The housing assembly (1) according to any one of claims 1 to 5, wherein: The enclosure (6) comprises an inner wall (32) lining the contact chamber (16) on the inside and an outer wall (36) surrounding the frame (4) on the outside, wherein the frame (4) is located between the inner wall (32) and the outer wall (36).

7. The housing assembly (1) according to any one of claims 1 to 6, wherein: The frame (4) and the enclosure (6) form a single body structure (40).

8. The housing assembly (1) according to claim 6 or 7, wherein: The inner wall (32) and the outer wall (36) are overmolded onto the frame (4).

9. The housing assembly (1) according to claim 6, wherein: The inner wall (32) and the outer wall (36) are prefabricated elements (46, 48) mounted on the frame (4).

10. The housing assembly (1) according to any one of claims 6 to 9, wherein: The at least one recess (52) is formed by the inner wall (32).

11. The housing assembly (1) according to any one of claims 1 to 10, wherein: The enclosure (6) comprises at least two recesses (52).

12. The housing assembly (1) according to claim 11, wherein: The at least two recesses (52) are arranged opposite one another relative to the contact chamber (16).

13. A switch device (2), comprising a housing assembly (1) according to any one of claims 1 to 10, a contact assembly (28) having a separable contact (18) located in a contact chamber (16) of the housing assembly (1), and at least one blow-out magnet (50) located in the at least one recess (52) of the enclosure (6) and in direct contact with the frame (4).

14. The switch device (2) according to claim 13, wherein: The at least one blow-out magnet (50) is a permanent magnet (70), and the magnetic flux of the at least one blow-out magnet (50) is conducted through the frame (4).

15. The switch device (2) according to claim 13 or 14, wherein: The back side (66) of each blow-out magnet (70) facing away from the contact chamber (16) is in direct contact with the frame (4).

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