Flush-mount electrical switch, compression element and kit of parts comprising the electrical switch

Abstract

An electrical switch includes a housing recessed within a wall and an actuator pivotally mounted about a rotation axis to switch contacts between two stable positions. The actuator is positioned at the front when recessed. The switch is characterized by a spring mounting aperture (103, 104) extending from the back surface toward the actuator, offset from the rotation axis, to accommodate a removable compression spring (102, 105). When inserted, the spring is preloaded against the actuator, biasing it toward one stable position, enabling monostable operation, while removing the spring allows bistable functionality, offering a versatile and adaptable switching mechanism.

Description

Technical Field

[0001] The present invention relates to electrical switching devices and, more particularly, to an electrical switch capable of operating in both bistable and monostable modes.

[0002] The invention further encompasses associated tools and mechanisms that facilitate seamless switching between these operational states in a manner that is both user-friendly and cost-effective.Prior art

[0003] It is known in the prior art to provide electrical switches that are configurable between bistable and monostable operation, allowing adaptability to different use cases. In such designs, a bistable switch maintains its position after actuation, requiring a second actuation to return to its initial or other state, while a monostable switch automatically returns to a default position when released.

[0004] Prior art implementations achieve this configurability by incorporating adjustable biasing mechanisms, such as springs or magnetic elements, which can be selectively engaged or disengaged to alter the switch behaviour. Some designs utilize cam mechanisms or locking structures within the housing to secure or release the biasing force, enabling easy reconfiguration. However, existing solutions often require complex assembly or additional components, increasing manufacturing costs and limiting ease of use. There remains a need for an improved switch design that offers seamless configurability between bistable and monostable operation while maintaining compactness, reliability, and ease of installation.

[0005] Document FR2953638B1 discloses a wall-mounted switching device designed for enhanced safety and configurability. The apparatus features a housing that accommodates an actuator capable of toggling between two stable positions to control an electrical circuit.

[0006] Document EP2978006B1 discloses an electrical switch with a driver toggling between two stable positions, controlled by a compressible element positioned between a bearing surface and the driver. The bearing surface is part of a movable component within the housing, which shifts between engaging or disengaging the compressible element. An actuator allows user interaction, selectively biasing the switch mechanism.

[0007] Existing solutions often require complex mechanical modifications, integrated components, or cumbersome installation processes to achieve dual-mode functionality, leading to increased manufacturing costs and maintenance efforts. Furthermore, conventional switching mechanisms may lack flexibility and adaptability, limiting their application across different industries and devices.Summary of the invention

[0008] Accordingly, the present invention aims to address these shortcomings by providing an improved electrical switch that allows for a simple and efficient transition between bistable and monostable operational modes. A further objective of the invention is to enable this transition to be performed in a cost-effective manner without the need for extensive mechanical alterations. The invention also contemplates tools and accessories that facilitate the implementation of the switching mechanism, thereby enhancing ease of installation, usability, and overall operational reliability.

[0009] By achieving these objectives, the present invention offers a practical and economical solution for applications requiring adaptable switching functionalities.

[0010] It is therefore the objective of the invention to provide an electrical switch and related tools and accessories for switching between bistable and monostable operations in a convenient and economic efficient manner.

[0011] According to the invention, this objective is solved by the electrical switch according to the first claim comprising a housing adapted to be recessed within a wall recess, and an actuator pivotally mounted about a rotation axis onto the housing configured to switch contacts between two stable positions by flipping around the rotation axis to selectively open or close an electrical circuit, the actuator positioned at the front when recessed, characterized in that the housing further comprises a spring mounting aperture passing from the back surface, when recessed, toward to the actuator at an offset from the rotation axis configured to receive and retain a compression spring in a fixed yet removable manner, wherein, when held, the compression spring is preloaded against the actuator, biasing it toward only one of the two stable positions.

[0012] The electrical switch is designed for flush mounting in various applications where, among other things, aesthetic integration, space efficiency, and safety are key considerations. The present invention relates to such a switch, comprising a housing specifically adapted to be recessed within a wall recess. While the switch is particularly suited for installation within a wall recess, it is important to note that the term "wall recess" should be interpreted broadly. The recessed housing can be embedded in various types of built-in enclosures, including ceiling recesses, floor recesses, furniture recesses, or other structural cavities designed to accommodate electrical components. To this end, the electrical switch preferably comprises a set of opposing claws designed to securely engage with the wall recess, ensuring a stable and reliable installation. It should thus be understood that although the switch is suitable for flush mounting that it is also suitable for other installation conditions.

[0013] The switch comprises an actuator pivotally mounted onto the housing about a defined rotation axis. This actuator is configured to switch electrical contacts between two stable positions, allowing it to control an electrical circuit by selectively opening or closing it. The pivotal movement of the actuator, flipping around the rotation axis, ensures a reliable and efficient switching mechanism that can be intuitively operated by the user. Furthermore, the actuator is positioned at the front of the switch when recessed, allowing for easy access and actuation without compromising the flush-mounted nature of the device. Under typical operating conditions once installed the actuator retains a cover plate facilitating switching between the two positions.

[0014] The actuation of the switch by rotating around its axis to alternate between two stable positions corresponds to a bistable mode of operation. In other words, in bistable mode, the switch maintains its last state after activation, meaning it remains in the position it was last set to until deliberately changed by the user. This functionality allows the switch to operate similarly to a toggle switch, where each actuation flips the state and holds it until the next interaction.

[0015] The housing of the switch is further designed to comprising a spring mounting aperture that extends from the back surface, when the switch is recessed, toward the actuator. This aperture is positioned at an offset from the rotation axis, allowing for the secure yet removable placement of a compression spring. In contrast to the prior art the compression spring is preloaded against the actuator when installed. This way a continuous biasing force that urges the actuator toward one of the two stable positions is exerted. This preloading effect ensures that the actuator remains in the preferred position unless an external force by a user is applied to overcome the spring's resistance. Thus, when the spring is inserted, the switch operates in monostable mode, and when the spring is removed, the switch reverts to bistable mode.

[0016] To further clarify, in monostable mode, the switch is designed to return to a predefined default position once the actuating force is removed. This behaviour is achieved through the biasing mechanism of the preloaded compression spring, which continuously applies force to the actuator, ensuring it remains in or reverts to a single stable position.

[0017] The inventors observed that in existing prior art, the spring is consistently integrated as a permanent component. Such a design according to the prior art has the drawback of increasing the complexity of the switch, which in turn raises manufacturing costs. As a result, it is not a cost-effective solution, particularly since the ability to switch between bistable and monostable modes is often unnecessary for most applications. The disclosed switch on the contrary can be manufactured and marketed without the inclusion of a spring or, more generally, any compression element, as will be further explained. The spring is an optional accessory that can be offered either as part of the switch package or sold separately.

[0018] Additionally, this design eliminates the risk of accidental switching between modes. When the spring is inserted, the switch operates in monostable mode, and when it is removed, it functions in bistable mode. This approach provides a simple yet effective solution, ensuring reliability while maintaining flexibility for different applications.

[0019] Another key advantage of the design is that the spring can be inserted from the back of the switch housing. This allows for easy installation and removal without requiring disassembly of the front-facing components, simplifying both manufacturing and user adjustments. By enabling access from the back, the design also minimizes the risk of accidental interference with the actuator mechanism, ensuring that the switch remains securely in its intended mode. This feature enhances flexibility, as users can conveniently modify the switch's functionality-switching between monostable and bistable modes-without complex modifications or specialized tools.

[0020] According to an embodiment, the spring mounting aperture comprises a snap recess configured to engage with a snap feature attached to the compression spring, the snap recess and snap feature collectively forming a reversible press-fit snap connection.

[0021] To further enhance the switch's ability to transition between the two modes, the housing is preferably designed with a snap recess at the mounting aperture, preferably at the side facing away from the actuator. This recess is configured to engage with a corresponding snap feature attached to the compression spring, collectively forming a reversible press-fit snap connection. This design ensures secure yet easily adjustable placement of the spring, allowing for quick and tool-free modifications between monostable and bistable operation.

[0022] According to an embodiment, the housing further comprises a second spring mounting aperture configured identically to the first spring mounting aperture, the second spring mounting aperture being positioned at the same offset from the rotation axis, such that a line connecting the two apertures is parallel to the rotation axis. Preferably, the two apertures are symmetrically positioned relative to a symmetry axis, the symmetry axis being a line perpendicular to the rotation axis and passing through its midpoint.

[0023] The housing may comprise a second spring mounting aperture, which is identical in configuration to the first. This second aperture is positioned at the same offset from the rotation axis, ensuring that a line connecting both apertures remains parallel to the rotation axis.

[0024] This symmetrical design provides significant advantages in terms of versatility and ease of installation. By allowing a spring to be inserted into the two apertures, mechanical balance and uniform force distribution are achieved especially when they are symmetrically arranged relative to a central symmetry axis-defined as a line perpendicular to the rotation axis and passing through its midpoint. This symmetry not only enhances the structural integrity of the switch but also ensures consistent and predictable actuation forces, preventing mechanical wear and optimizing long-term performance. Additionally, the presence of dual mounting apertures provides added flexibility in manufacturing and assembly, as the switch can be adapted for different applications without requiring modifications to the housing design. This is the case for the second aspect of the invention as will be discussed. This applies to the second aspect of the invention, which will be further discussed.

[0025] Hence, according to a second aspect of the invention, an electrical switch assembly for flush mounting is disclosed comprising a housing adapted to be recessed within a recess of a wall comprising a first and second electrical switch according to the first aspect of the invention, wherein the first and second electrical switches are configured to operate independently of each other within the same housing.

[0026] The second aspect of the invention comprises an electrical switch assembly for flush mounting comprising both a first and a second electrical switch, each corresponding to the first aspect of the invention. A key advantage of this configuration is that the two switches operate independently within the same housing, allowing for greater flexibility in controlling multiple circuits while maintaining a compact and space-efficient design. This independence ensures that each switch can function in either bistable or monostable mode, depending on whether a spring is inserted, without affecting the operation of the other switch. Such a design is particularly beneficial in applications requiring dual control points within a single installation, such as lighting systems with separate circuit control, multifunctional panels, or customized electrical setups where space constraints demand an integrated yet modular approach. By consolidating two independently functioning switches within a single recessed housing, the invention enhances both usability and installation efficiency while maintaining a sleek and unobtrusive appearance.

[0027] Preferably, the first and second actuators of the respective electrical switches are positioned adjacent to each other, with their respective rotation axes collinear. This design offers several advantages in terms of usability, mechanical efficiency, and space optimization. By positioning the actuators side by side along a shared rotation axis, the switch assembly maintains a compact and streamlined form, making it particularly suitable for flush-mounted installations where space constraints are a concern. Additionally, aligning the rotation axes ensures a consistent and balanced actuation mechanism, reducing mechanical stress and wear over time. From a user interaction perspective, having the actuators adjacent to each other provides an intuitive interface, allowing for easy operation of both switches without unnecessary hand repositioning.

[0028] Furthermore, the housing preferably comprises a set of claws extending from opposite sides configured to engage with the recess of the wall, similar or identical as to the first aspect of the invention.

[0029] According to a third aspect of the invention, a compression element configured to be housed by the spring mounting aperture for the electrical switch according to the first aspect of the invention is disclosed. It should be understood that this likewise corresponds to the spring mounting aperture for the electrical switch assembly according to the second aspect of the invention.

[0030] The compression element is specifically designed to be housed within the spring mounting aperture of the electrical switch described in the first and second aspect of the invention. Therefore, this compression element plays a crucial role in determining the switching behaviour, as its presence or absence defines whether the switch operates in a monostable or bistable mode. By integrating seamlessly into the designated mounting aperture, the compression element ensures reliable functionality while allowing for quick and effortless reconfiguration of the switch's operational mode. The compression element is thus a separate element yet interacts with electrical switch. This aspect of the invention, therefore, contributes to both cost efficiency and ease of use, ensuring a practical and adaptable design for a wide range of applications. As mentioned earlier, this can be sold or provided separately. Accordingly, an independent claim covering this element is justified.

[0031] Furthermore, a broader claim is formulated for the compression element, as it is essential that the element applies a pushing force to the actuator, as previously explained. The primary requirement is that it fits within the mounting aperture, ensuring proper functionality. Therefore, a compression spring is preferably used as the compression element, given its ability to provide the necessary biasing force while maintaining a simple and reliable design. Nevertheless, alternative designs specifically tailored to fit the mounting aperture are also encompassed within the scope of the invention. Therefore, preferably, the compression element comprises a snap feature to engage with the snap recess of the electrical switch when present.

[0032] According to a fourth aspect, a kit of parts is disclosed comprising an electrical switch according to the first aspect of the invention, and a compression element according to the third aspect of the invention.

[0033] According to a fifth aspect of the invention, a kit of parts is disclosed comprising an electrical switch assembly according to the second aspect of the invention, and a compression element according to the third aspect of the invention.Brief description of the Drawings

[0034] Exemplary embodiments of the invention are described using the figures. It is to be understood that these figures merely serve as examples of how the invention can be implemented and are in no way intended to be construed as limiting for the scope of the invention and the claims. Figure 1 is a perspective view of the back of the electrical switch assembly according to an embodiment of the invention Figures 2(a) (b) are a cross-section views of the electrical switch assembly according to an embodiment of the invention; Figure 3 is a perspective view the compression elements according to an embodiment of the invention; Figure 4 is another perspective view of the back of the electrical switch assembly corresponding to the other figures; Figures 5(a), (b) and (c) are further views of the back of the electrical switch assembly corresponding to the other figures; Figure 6(a) and (b) are perspective views of the electrical switch assembly according to an embodiment of the invention having a covered plate respectively flushed mounted; Figure 7(a) and (b) are perspective views of the electrical switch according to an embodiment of the invention.

[0035] In the drawings, the same reference numbers have been allocated to the same or analogue element.Detailed description of an embodiment of the invention

[0036] Other characteristics and advantages of the present invention will be derived from the non-limitative following description, and by making reference to the drawings and the examples.

[0037] Throughout the drawings, identical reference numbers are assigned to the same or analogous elements, ensuring clarity and consistency in understanding the invention's various components. These figures collectively provide a detailed and structured depiction of the invention, aiding in the comprehension of its construction and functionality.

[0038] The accompanying figures provide a comprehensive visual representation of the electrical switch assembly and its components, illustrating various aspects of its design and functionality. Figure 1 presents a perspective view of the back of the electrical switch assembly according to one embodiment, offering an overview of the housing and its structural features. Figures 2(a) and 2(b) depict cross-sectional views of the assembly, detailing the internal arrangement of components and the mechanism enabling the switch to transition between different operational modes. Figure 3 focuses on the compression elements, showcasing their design and how they interact with the switch mechanism. Figure 4 provides an additional perspective view of the back of the electrical switch assembly, complementing the previous figures and reinforcing the understanding of its structural layout. Figures 5(a), 5(b), and 5(c) present further views of respectively the back, side and front of the switch assembly, ensuring a detailed visualization of its design consistency across multiple perspectives. Lastly, Figures 6(a) and 6(b) illustrate the electrical switch in its installed state, showing its appearance with a cover plate and when flush-mounted, demonstrating its integration into a wall or other surfaces.

[0039] Figure 1 illustrates two spring mounting apertures, labelled 103 and 104, designed to accommodate compression springs 105 and 106, which can be inserted to modify the switch's operational mode. Each compression spring is equipped with snap features 101 and 102, which engage with the corresponding snap recesses within the apertures 105 and 106. This snap-fit mechanism ensures a secure yet removable connection, allowing for easy modification between bistable and monostable operation.

[0040] Additionally, the illustration highlights four connection points, such as references 107 and 108, which indicate the presence of multiple electrical connections within the assembly. The inclusion of these connection points further confirms that Figure 1 represents an embodiment featuring two independent electrical switches housed within a single enclosure. This design allows both switches to function separately while sharing the same structural housing, making it an efficient and compact solution for applications requiring dual-switch control. The integration of independent switching mechanisms within a unified assembly enhances flexibility, installation convenience, and adaptability for various electrical systems, particularly in environments where space constraints necessitate a streamlined yet functional setup.

[0041] To further illustrate the switching mechanism, Figure 2 provides a cross-sectional view of the assembly depicted in Figure 1, offering a detailed insight into its internal configuration. Figure 2(a) shows the assembly with the compression element inserted into the spring mounting aperture, whereas Figure 2(b) illustrates the assembly without the compression element, highlighting the difference in operational behaviour.

[0042] With reference to 202, it is evident that the compression spring applies force at the back of the actuator, labelled 204. This force biases the actuator into a default position, ensuring that when the user presses on the designated actuation point, labelled 203, the switch will return to its original state upon release. This automatic reset confirms that the switch operates in monostable mode, where an external force is required to hold it in an alternate position temporarily.

[0043] Furthermore, reference 205 indicates the location of the mechanism (not explicitly illustrated) responsible for enabling bistable operation. In this configuration, the actuator 204 rotates around a fixed rotation axis, also marked as 205, allowing the switch to maintain its last state until actively toggled again. This design ensures that the switch can seamlessly transition between monostable and bistable functionality depending on the presence or absence of the compression element, providing versatility for various electrical applications. By visualizing these differences, Figure 2 effectively demonstrates how the switch mechanism adapts to user input and external biasing forces, reinforcing the practical advantages of this innovative design.

[0044] Figure 3 provides a detailed view of the compression elements, showcasing their design and structural features.

[0045] Figure 4 provides another perspective of the back of the assembly, now highlighting the inclusion of a set of claws, labelled 401 and 402, specifically designed to facilitate flush mounting within a wall recess. These claws serve a crucial role in securing the switch assembly in place, ensuring a stable and reliable installation without the need for additional fasteners. By engaging with the recess, the claws prevent unwanted movement and contribute to the seamless integration of the switch within the mounting surface. This design not only enhances the aesthetic appeal of the installed switch by keeping it flush with the wall but also simplifies the installation process, reducing the effort and time required for mounting. Furthermore, the secure engagement mechanism minimizes the risk of loosening over time, ensuring long-term durability and reliability in various applications.

[0046] Figures 5(a), 5(b), and 5(c) provide additional views of the switch assembly from different angles, offering a comprehensive visualization of its design consistency and structural features. Figure 5(a) illustrates the back of the assembly, highlighting the mounting components and mechanisms that secure it within a recess. Figure 5(b) presents a side view, showcasing the depth and profile of the assembly, which is particularly useful in understanding its flush-mounting capabilities. Finally, Figure 5(c) offers a front view, clearly revealing the presence of two independent electrical switches, labelled 501 and 502. This front-facing perspective emphasizes the modular nature of the switch assembly, where each switch operates independently within a single housing. This dual-switch configuration enhances functionality, allowing users to control multiple circuits while maintaining a compact and aesthetically integrated installation.

[0047] Further, Figure 6 depicts the switch assembly equipped with a cover plate that is divided into two sections, labelled 601 and 602, corresponding to the two independent electrical switches housed within the assembly. This split design allows each switch to be individually accessible while maintaining a clean and structured appearance. The separation of the cover plates ensures functional distinction, making it easier to operate each switch independently without interference.

[0048] Additionally, when the assembly is mounted, an external cover plate, labelled 603, may be added for aesthetic purposes. This external plate serves to enhance the visual integration of the switch assembly within its surrounding environment, providing a seamless and polished finish that aligns with modern interior and architectural standards. Beyond aesthetics, the cover plate also offers protective benefits, shielding the internal components from dust, moisture, and accidental contact, thereby improving the durability and longevity of the switch assembly.

[0049] By incorporating both functional and aesthetic elements, Figure 6 demonstrates how the invention ensures practical usability while maintaining a sleek, flush-mounted appearance, making it suitable for a wide range of applications in residential, and commercial settings.

[0050] Finally, Figure 7 illustrates an embodiment of the electrical switch incorporating the technical features as defined in the first claim. The switch comprises a spring mounting aperture 701 configured to accommodate a compression spring 702. The compression spring 702 is arranged to exert a biasing force on the actuator 703, thereby facilitating its movement. This figure exemplifies the embodiment comprising the essential structural and functional elements necessary for achieving the intended operation of the invention, as claimed.

[0051] It should be understood that the present invention is not limited to the described embodiments and that variations can be applied without going outside of the scope of the claims.

Claims

1. An electrical switch for flush mounting comprising a housing adapted to be recessed within a wall recess, and an actuator (204) pivotally mounted about a rotation axis (205) onto the housing configured to switch contacts between two stable positions by flipping around the rotation axis (205) to selectively open or close an electrical circuit, the actuator (204) positioned at the front when recessed, CHARACTERIZED IN THAT the housing further comprises a spring mounting aperture (103, 104) passing from the back surface, when recessed, toward to the actuator (204) at an offset from the rotation axis configured to receive and retain a compression spring (102, 105) in a fixed yet removable manner, wherein, when held, the compression spring (102, 105) is preloaded (202) against the actuator (204), biasing it toward only one of the two stable positions.

2. The electrical switch according to claim 1, wherein the spring mounting aperture (103, 104) comprises a snap recess configured to engage with a snap feature (101, 102) attached to the compression spring (105, 106), the snap recess and snap feature (101, 102) collectively forming a reversible press-fit snap connection.

3. The electrical switch according to any of the preceding claims, wherein the snap recess is located at the side facing away from the actuator (204).

4. The electrical switch according to any of the preceding claims, wherein the actuator (204) is further configured to retain a cover plate (601, 602) facilitating switching between the two positions.

5. The electrical switch according to any of the preceding claims, wherein the housing further comprises a second spring mounting aperture (103,104) configured identically to the first spring mounting aperture, the second spring mounting aperture being positioned at the same offset from the rotation axis (205), such that a line connecting the two apertures is parallel to the rotation axis (205).

6. The electrical switch according to claim 5, wherein the two apertures (105, 106) are symmetrically positioned relative to a symmetry axis, the symmetry axis being a line perpendicular to the rotation axis (205) and passing through its midpoint.

7. The electrical switch according to any of the preceding claims, wherein the housing further comprises a set of claws (401, 402) extending from opposite sides configured to engage with the recess of the wall.

8. An electrical switch assembly for flush mounting comprising a housing adapted to be recessed within a recess of a wall comprising a first and second electrical switch according to any of the claims 1 to 4, wherein the first and second electrical switches are configured to operate independently of each other within the same housing.

9. The electrical switch assembly according to claim 8, wherein the first and second actuators are positioned adjacent to each other, with their respective rotation axes collinear.

10. The electrical switch assembly according to any of the claim 8 to 9, wherein the housing further comprises a set of claws extending from opposite sides configured to engage with the recess of the wall.

11. A compression element configured to be housed by the spring mounting aperture for the electrical switch according to any of the claims 1 to 6.

12. The compression element according to claim 11 comprising a compression spring (105, 106).

13. The compression element according to any of the claims 11 to 12, comprising a snap feature to engage with the snap recess (101, 102) of the electrical switch when present.

14. A kit of parts comprising an electrical switch according to any of the claims 1 to 7, and a compression element according to any of the claims 11 to 13.

15. A kit of parts comprising an electrical switch assembly according to any of the claims 8 to 10, and a compression element according to any of the claims 11 to 13.

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