Description:TECHNICAL FIELD
[0001] The present disclosure relates, in general, to shape and type of contact spring, and more specifically, relates to a conical compression type contact spring in electro-magnetic switching device.

BACKGROUND
[0002] The electro-magnetic switching devices used for making and breaking electric circuits. In such devices, contact springs play a crucial role in ensuring effective electrical contact during the closed state. They achieve this by applying adequate contact pressure, which in turn reduces contact resistance and minimizes the temperature rise of the contacts. Furthermore, contact springs serve to absorb impact forces on the contactor, thereby mitigating wear and minimizing contact bounce. This functionality significantly extends the operational lifespan of the contactor.
[0003] Currently, electromagnetic switching devices employ helical compression-type contact springs 100, strategically positioned within the housing to facilitate optimal contact pressure on the moving contacts during closure. An example of such electromagnetic switching devices is described in CN201112209Y and CN201112201Y. These patents are basically for installing push button assembly as shown in FIG 1. In this, the chock bottom is fixed with the conical contact spring by rivet, the rivet runs through the installing ring of chock and conical contact spring 104, and the rivet upper end is positioned at that the ring wall contacts with the second helical spring 102 and the conducting of conical contact spring. When external force is applied to the push button, both helical and conical springs are compressed. The helical spring provides pressure on the moving part of the component. Once external force is removed from push button then de-energization of conical spring helps push button to return its initial position. The contact spring mentioned does not fulfil the purpose of maintaining contact pressure on moving contacts.
[0004] Another example is recited in patent DE102010038004A1. It relates to a spark generator 200 for burners, for oil / diesel burners for use in cleaning appliances assembly as shown in FIG 2. These are partial contact springs 202 used for pre-centering purpose. Such contact springs consist of a tightly wound coil spring whose inner diameter is slightly lower than the terminal areas of the ignition electrodes. If these are now inserted into the contact springs, then the contact springs deform slightly and thus allow the insertion of the connection areas of the ignition electrodes, thereby securely embracing the connection areas and ensuring good and safe electrical contact between the spark generator and ignition electrode. However, this application does not relate to contact springs as a conical compression type and is associated with electromagnetic switching devices.
[0005] Another example is recited in a patent FR981786A. It relates to light signaling device 300, intended for vehicle assembly as shown in FIG 3. In this, the shaft of the buffer that controls the switching conical contact springs 302 and which is operative to provide acoustic signals and off - the EPG or light is mounted in the hollow shaft of the contact disc and carries a control knob on its end which emerges from the cylinder. However, this application does not relate to contact spring as a conical compression type and is associated with electro-magnetic switching devices.
[0006] Yet another example is recited in a US20080156594-A1, that relates to a de-energization operation type electromagnetic brake device assembly 400 as shown in FIG 4, comprising a plurality of conical springs 402 for pressing an armature disk against a fixed disk through a friction disk held therebetween. The conical springs are inserted into the spring insertion recessed parts of the yoke of an electromagnet and held between the bottom faces of the recessed parts and the armature disk in a compressed state.
[0007] When the electromagnet is energized, the armature disk moves against the spring force of the conical springs and is magnetically attracted to and chucked on the front-end surface of the electromagnet. The conical springs are compressed by the armature disk to the length dimension corresponding to the depth of the spring insertion recessed part. The friction disk is switched to a released state, and the brake force acting on the rotating shaft, which integrally rotates with the friction disk, is cancelled. When the electromagnet is de-energized, this conical spring is de-compressed to provide the return force to aloe the armature disk at its initial position.
[0008] The current inventions predominantly feature contact springs utilizing a helical compression design. However, the helical shape imposes limitations on achieving lower solid lengths, particularly in specific applications. Lower solid lengths are instrumental in allowing a comparatively greater separation gap between moving contacts and fixed contacts. This adjustment is crucial for enhancing the performance of electromagnetic switching devices under short-circuit conditions.
[0009] Therefore, it is desired to overcome the drawbacks, shortcomings, and limitations associated with existing solutions, and develop conical shape compression-type springs that address this limitation. By virtue of their design, conical compression-type springs can achieve lower solid lengths compared to their helical counterparts. This enables the attainment of desired spring loads at specific lengths, thereby presenting a significant advancement in optimizing the performance of electromagnetic switching devices.

OBJECTS OF THE PRESENT DISCLOSURE
[0010] An object of the present disclosure relates, in general, to the shape and type of contact spring, and more specifically, relates to a conical compression-type contact spring in an electromagnetic switching device.
[0011] Another object of the present disclosure is to provide a device having a conical-shaped contact spring, which achieves lower solid lengths through the partial overlapping of turns one over the other.
[0012] Another object of the present disclosure is to provide a device having a conical contact spring, characterized by its lower solid length, which results in an increased separation gap between the moving and fixed contacts, especially under short circuit conditions in an electromagnetic switching device.
[0013] Another object of the present disclosure is to provide a device with a conical contact spring that contributes to improved stability by performing controlled contact transitions.
[0014] Yet another object of the present disclosure is to provide a device with conical contact springs that exhibit a reduced buckling tendency, which translates to a higher slenderness ratio and enhanced structural integrity.

SUMMARY
[0015] The present disclosure relates in general, to the shape and type of contact spring, and more specifically, relates to a conical compression type contact spring in an electro-magnetic switching device. The main objective of the present disclosure is to overcome the drawbacks, limitations, and shortcomings of the existing device and solution, by providing a conical shape compression type spring that allows lower solid lengths than that can be achieved with that helical shape to provide desired spring loads at specific lengths. Lower solid lengths of contact springs allow a relatively higher separation gap for moving contacts from fixed contacts such that to improve performance under short circuit conditions of the electro-magnetic switching device.
[0016] The electromagnetic switching device includes a contact spring with a compression-type configuration, the contact spring comprising a coil at the top with an outer diameter smaller than that of the coil at the bottom defining a tapered or conical configuration. A fixed contact serves as a stationary counterpart, and a moving contact is activated to make or break electrical contact with the fixed contact for establishing or interrupting an electrical circuit. The contact spring is operable to compress when subjected to activation of the electromagnetic device, the activation generates electromagnetic forces that induce the compression of the contact spring, enabling the contact spring to supply essential contact pressure for electrical connection and to create a maximal separation gap between the fixed contact and the moving contact. The conical contact spring provides enhanced stability, ensuring consistent and reliable electrical connection between the fixed contact and the moving contact during operation.
[0017] The contact spring defining the conical configuration exhibits a lower solid length, allowing for the maximal separation gap between the fixed contact and the moving contact under short circuit conditions. The contact spring exhibits a reduced likelihood of buckling or deforming under compression, signifying an elevated degree of structural stability. The reduced buckling tendency of the contact spring allows for a higher slenderness ratio.
[0018] Further, the device includes a contact bridge having an aperture through which the contact spring is assembled. The aperture having an elevated point on its upper surface, receives the smaller outer diameter section of the contact spring thereby securing the position of the contact spring for compression and separation of contacts. The contact bridge serves as a housing for the contact spring. The moving contact is assembled on the lower flat side of the contact bridge and responds to electromagnetic forces for establishing or breaking electrical contact with the fixed contact.
[0019] Besides, the device includes a spring retainer located above the moving contact exhibits a protrusion that aligns with a corresponding groove on the spring retainer so as to secure the placement of the spring retainer and synchronize the movement with the moving contact to maintain alignment and stability during operation. The larger outer diameter side of the contact spring is located within the extended part of the spring retainer, and the smaller outer diameter side of the contact spring securely fits within the elevated point situated on the top side of the aperture, thereby contributing to improved stability by performing controlled contact transitions.
[0020] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
[0022] FIG. 1 illustrates a schematic view of push-button assembly.
[0023] FIG. 2 illustrates a schematic view of burners for use in cleaning appliance assembly.
[0024] FIG. 3 illustrates a schematic view of a light signaling device for vehicle assembly.
[0025] FIG. 4 illustrates a schematic view of de-energization operation type electromagnetic brake device assembly.
[0026] FIG. 5A to 5C illustrate the exemplary view of a conical compression-type contact spring, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0027] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0028] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0029] The present disclosure relates, in general, to the shape and type of contact spring, and more specifically, relates to a conical compression type contact spring in an electro-magnetic switching device. The present disclosure relates to an electro-magnetic switching device that includes a contact spring with a compression-type configuration, the contact spring comprising a coil at the top with an outer diameter smaller than that of the coil at the bottom defining a tapered or conical configuration. A fixed contact serves as a stationary counterpart, and a moving contact is activated to make or break electrical contact with the fixed contact for establishing or interrupting an electrical circuit. The contact spring is operable to compress when subjected to activation of the electromagnetic device, the activation generates electromagnetic forces that induce the compression of the contact spring, enabling the contact spring to supply essential contact pressure for electrical connection and to create a maximal separation gap between the fixed contact and the moving contact. The present disclosure can be described in enabling detail in the following examples, which may represent more than one embodiment of the present disclosure.
[0030] The advantages achieved by the device of the present disclosure can be clear from the embodiments provided herein. The device having a conical-shaped contact spring that achieves lower solid lengths through the partial overlapping of turns one over the other. The device having a conical contact spring, characterized by its lower solid length, results in an increased separation gap between the moving and fixed contacts, especially under short circuit conditions in an electromagnetic switching device. The device having a conical contact spring contributes to improved stability by performing controlled contact transitions. Further, the device with conical contact springs exhibits a reduced buckling tendency, which translates to a higher slenderness ratio and enhanced structural integrity. The description of terms and features related to the present disclosure shall be clear from the embodiments that are illustrated and described; however, the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents of the embodiments are possible within the scope of the present disclosure. Additionally, the invention can include other embodiments that are within the scope of the claims but are not described in detail with respect to the following description.
[0031] FIG. 5A to 5C illustrates exemplary view of conical compression type contact spring, in accordance with an embodiment of the present disclosure.
[0032] Referring to FIG. 5A, electro-magnetic switching device 500 having conical compression type contact spring 502 is strategically accommodated within the housing of the electro-magnetic switching device 500 that are essential components within electrical systems, responsible for making and breaking electrical circuits. They utilize electromagnetic principles to control the flow of current through the circuit. The device 500 can include contact spring 502, fixed contact 504, moving contact 506, contact bridge 508 and spring retainer 510.
[0033] The contact spring 502 with a compression-type configuration can include a coil (also interchangeably referred to as topmost turn, herein) at the top with an outer diameter smaller than that of the coil (also interchangeably referred to as bottommost turn) at the bottom defining a tapered or conical configuration. The conical compression type contact spring 502 having the outer diameter of the topmost turn is smaller than that of the bottommost turn, imparting a tapered or conical form to the spring. This unique shape enhances the performance of the spring and functionality within the electromagnetic device 500. This tapering effect is pivotal in achieving the desired configuration. The contact spring 502 provides the necessary contact pressure for efficient electrical connection and allows for a maximum separation gap between the fixed contact 504 and the moving contact 506 during compression.
[0034] The fixed contact 504 serves as a stationary counterpart, and the moving contact 506 is activated to make or break electrical contact with the fixed contact 504 for establishing or interrupting an electrical circuit. The fixed contact 504 is another integral part of the electromagnetic device 500. It remains stationary and serves as the counterpart to the moving contact 506. When the device is activated, the moving contact 506 makes or breaks contact with the fixed contact 504 to establish or interrupt the electrical circuit. The contact spring 502 is operable to compress when subjected to activation of the electromagnetic device 500, the activation generates electromagnetic forces that induce the compression of the contact spring, enabling the contact spring to supply essential contact pressure for electrical connection and to create a maximal separation gap between the fixed contact 504 and the moving contact 506.
[0035] The contact bridge 508 serves as a housing for the conical contact spring 502. It features a window (also referred to as aperture, herein) through which the spring 502 is assembled. The top side of the window has a pip (also referred to as elevation point, herein) that accommodates the smaller outer diameter side of the spring 502. The contact bridge 508 holds the spring 502 in position while enabling it to compress and separate the contacts effectively, thereby securing the position of the contact spring 502 for compression and separation of contacts.
[0036] The moving contact 506 is assembled on the lower flat side of the contact bridge 508. Its role is pivotal in establishing and breaking electrical contact with the fixed contact 504. This component moves in response to the electromagnetic forces generated within the device.
[0037] The spring retainer 510 located above the moving contact 506 exhibits a protrusion that aligns with a corresponding groove on the spring retainer so as to secure the placement of the spring retainer 510 and synchronize the movement with the moving contact 506 to maintain alignment and stability during operation. The spring retainer 510 is placed over the moving contact 506. It has a protrusion that fits into a groove provided on the spring retainer 510. This arrangement secures the spring retainer 510 in place and ensures that it moves in conjunction with the moving contact 506. It is crucial for maintaining the alignment and stability of the components during operation.
[0038] The conical contact spring 502 is positioned within the window of the contact bridge 508, with its larger outer diameter side situated in the extended part of the spring retainer 510. The smaller outer diameter side fits snugly inside the pip provided on the top side of the window. In operation, when the conical contact spring 502 is compressed to its solid length, it maximizes the separation gap between the fixed contact 504 and the moving contact 506. This arrangement ensures efficient electrical contact during device operation.
[0039] For example, in an electromagnetic contactor, the conical compression type contact spring 502 is integrated to provide the necessary contact pressure between the fixed and moving contacts. This ensures a reliable and stable electrical connection when the contactor is engaged. For instance, within an industrial control panel, the conical compression-type contact spring is strategically placed to exert the required pressure on the moving contact. This ensures optimal electrical conductivity and minimizes the risk of poor contact or electrical arcing. By utilizing a conical compression-type contact spring, the contactor can effectively handle the demands of switching high electrical loads. This leads to improved performance, reduced wear and tear, and enhanced overall reliability in industrial applications.
[0040] The contact spring 502 defining the conical configuration exhibits the lower solid length, allowing for the maximal separation gap between the fixed contact 504 and the moving contact 506 under short circuit conditions. The contact spring 502 exhibits a reduced likelihood of buckling or deforming under compression, signifying an elevated degree of structural stability. The reduced buckling tendency of the contact spring allows for a higher slenderness ratio.
[0041] Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and provides the conical compression type contact spring design that allows lower solid lengths than that can be achieved with that of helical shape to provide the same spring loads at specific lengths. Lower solid lengths of contact springs allow relatively higher separation of moving contacts from fixed contacts such that to improve performance under short circuit conditions of electro-magnetic switching devices.
[0042] It will be apparent to those skilled in the art that the device 500 of the disclosure may be provided using some or all of the mentioned features and components without departing from the scope of the present disclosure. While various embodiments of the present disclosure have been illustrated and described herein, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the disclosure, as described in the claims.

ADVANTAGES OF THE PRESENT INVENTION
[0043] The present invention provides a device having a conical-shaped contact spring, achieves lower solid lengths through the partial overlapping of turns one over the other.
[0044] The present invention provides a device having a conical contact spring, characterized by its lower solid length, which results in an increased separation gap between the moving and fixed contacts, especially under short circuit conditions in an electromagnetic switching device.
[0045] The present invention provides a device having a conical contact spring that contributes to improved stability by performing controlled contact transitions.
[0046] The present invention provides a device with conical contact springs that exhibit a reduced buckling tendency, which translates to a higher slenderness ratio and enhanced structural integrity.
, Claims:1. An electromagnetic switching device (500) comprising:
a contact spring (502) with a compression-type configuration, the contact spring comprising a coil at the top with an outer diameter smaller than that of the coil at the bottom defining a tapered or conical configuration; and
a fixed contact (504) serving as a stationary counterpart, and a moving contact (506) activated to make or break electrical contact with the fixed contact (504) for establishing or interrupting an electrical circuit,
wherein the contact spring (502) is operable to compress when subjected to activation of the electromagnetic device, the activation generates electromagnetic forces that induce the compression of the contact spring, enabling the contact spring to supply essential contact pressure for electrical connection and to create a maximal separation gap between the fixed contact (504) and the moving contact (506).
2. The device as claimed in claim 1, wherein the contact spring (502) defining the conical configuration exhibits a lower solid length, allowing for the maximal separation gap between the fixed contact (504) and the moving contact (506) under short circuit conditions.
3. The device as claimed in claim 1, wherein the contact spring (502) exhibits a reduced likelihood of buckling or deforming under compression, signifying an elevated degree of structural stability.
4. The device as claimed in claim 1, wherein the reduced buckling tendency of the contact spring allows for a higher slenderness ratio.
5. The device as claimed in claim 1, wherein the device comprises a contact bridge (508) having an aperture through which the contact spring (502) is assembled, the aperture having an elevated point on its upper surface, receives the smaller outer diameter section of the contact spring thereby securing the position of the contact spring for compression and separation of contacts.
6. The device as claimed in claim 1, wherein the contact bridge (508) serves as a housing for the contact spring (502).
7. The device as claimed in claim 1, wherein the moving contact (506) is assembled on the lower flat side of the contact bridge (508) and responds to electromagnetic forces for establishing or breaking electrical contact with the fixed contact (504).
8. The device as claimed in claim 1, wherein the device comprises a spring retainer (510) located above the moving contact (506) exhibits a protrusion that aligns with a corresponding groove on the spring retainer so as to secure the placement of the spring retainer and synchronize the movement with the moving contact (506) to maintain alignment and stability during operation.
9. The device as claimed in claim 1, wherein the larger outer diameter side of the contact spring (502) is located within the extended part of the spring retainer (510), and the smaller outer diameter side of the contact spring (502) securely fits within the elevated point situated on the top side of the aperture.
10. The device as claimed in claim 1, wherein the conical contact spring (502) provides enhanced stability, ensuring consistent and reliable electrical connection between the fixed contact (504) and the moving contact (506) during operation.