Description:TECHNICAL FIELD
[0001] The present disclosure relates, in general, to the draw-out relay, and more specifically, relates to a handle locking arrangement for the draw-out relay to enable the locking/unlocking through automated and manual modes.

BACKGROUND
[0002] The feeder protection relays are widely used at the feeder levels in the electrical circuit for monitoring the effective functioning of the feeder. For making feeder protection relay maintenance supportive draw-out type is made. The draw-out type relay has a fixed frame and removable draw-out assembly. Draw-out assembly needs to be reliably locked to avoid accidental opening due to vibrations in the panel or site of installation. The unlocking can be done in two ways i.e., manual/automated. Automated unlocking can be done by all operators and manual unlocking can only be done by skilled/trained persons thus giving an advantage to prevent unwanted opening by laymen.
[0003] The relay is an electrical switch with electromagnet or solid-state devices along with required logic built to operate the main switch for an intended function. In protective relay, a relay device designed to trip a circuit breaker when it detects an abnormal operating condition such as over-current, over-voltage, reverse power flow, over-frequency, and under-frequency fault is detected. The feeder protection relays are widely used at the feeder levels in electrical circuits for monitoring the effective functioning of the feeder. For making feeder protection relay maintenance supportive draw-out type is made. The handle is used to draw-in and draw-out the relay during operation. Currently, the existing products known in the art uses a screw for locking handle with bezel which is not reliable and customer friendly. However, existing products do not offer reliable and dual methods for unlocking.
[0004] Therefore, it is desired to overcome the drawbacks, shortcomings, and limitations associated with existing solutions, and develop a cost-effective handle locking arrangement for with-drawable relay to enable multiple reliable locking and unlocking arrangements for the customer.
OBJECTS OF THE PRESENT DISCLOSURE
[0005] An object of the present disclosure relates, in general, to draw-out relay, and more specifically, relates to a handle locking arrangement for draw-out relay to enable the locking/unlocking through automated and manual modes.
[0006] Another object of the present disclosure is to provide a handle-locking arrangement that provides reliable locking to avoid the opening of draw-out module during vibration.
[0007] Another object of the present disclosure is to provide a handle-locking arrangement that provides easy locking and dual unlocking methods as per user requirements.
[0008] Another object of the present disclosure is to provide a handle-locking arrangement that offers both automatic and manual means of locking and unlocking, providing users with flexibility and adaptability to suit their specific requirements and preferences.
[0009] Yet another object of the present disclosure is to provide a handle-locking arrangement that mitigates the risk of damage to internal components by securely enclosing them within the bezel, safeguarding against external elements or impacts.

SUMMARY
[0010] The present disclosure relates in general, to draw-out relay, and more specifically, relates to a handle locking arrangement for draw-out relay to enable the locking/unlocking through automated and manual modes. The main objective of the present disclosure is to overcome the drawbacks, limitations, and shortcomings of the existing structure and solution, by providing a handle lock design for the draw-out relay to provide auto locking and dual methods for unlocking.
[0011] The present disclosure provides a handle locking arrangement for withdrawable relay, the handle locking arrangement includes a bezel configured as an outer casing that accommodates handle lock assembly. A handle coupled to the bezel is adapted to move from a close position to an open position. The handle in the closed position is securely positioned within the bezel, ensuring proper containment. The handle in the open position is extended outwards, allowing for user interaction with the locking mechanism.
[0012] A handle lock component is accommodated in the bezel, wherein the position of the handle lock component is adjustable by applying axial force to push the handle lock component inward, followed by rotation in either a clockwise or counterclockwise direction, enabling both manual and automated operation for locking and unlocking of the handle. The handle lock component is switchable between the distinct positions by applying axial force to push the handle lock component inward, followed by rotating the handle lock component by a predefined angle in either the clockwise or counterclockwise direction, the distinct positions include a first position and a second positions of the handle lock component. The handle lock component is rotated by the predefined angle of 90 degrees. The handle can include a circular aperture, through which the handle lock component engages and disengage, thereby effecting the locking and unlocking of the handle.
[0013] The first position of the handle lock component allows the handle to lock and unlock automatically without manual intervention. The second position of the handle lock component allows the handle to lock automatically and unlock manually.
[0014] Further, a compression spring accommodated within the handle lock component, imparts necessary force for transitioning the handle lock component between the distinct positions. Moreover, the bezel incorporating a profile contour within the bezel enables the handle lock component to remain in distinct positions, facilitated by the compression spring.
[0015] 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
[0016] 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.
[0017] FIG. 1A illustrates an exemplary isometric view of the bezel with handle in close and open conditions, in accordance with an embodiment of the present disclosure.
[0018] FIG. 1B illustrates an exploded view of all the assembly components, in accordance with an embodiment of the present disclosure.
[0019] FIG. 1C illustrates the dual position of the handle lock component after closing the handle where the right side image illustrates the first position and the left side image illustrates the second position of handle lock component, in accordance with an embodiment of the present disclosure.
[0020] FIG. 1D illustrates an isometric view of the handle lock component, in accordance with an embodiment of the present disclosure.
[0021] FIG. 1E illustrates manual unlock mode with a handle in closed condition and handle lock component in second position, in accordance with an embodiment of the present disclosure.
[0022] FIG. 1F illustrates auto lock mode with handle in open condition and handle lock component in second position, in accordance with an embodiment of the present disclosure.
[0023] FIG. 1G illustrates auto-unlock mode with handle in closed condition and handle lock component in first position, in accordance with an embodiment of the present disclosure
[0024] FIG. 1H illustrates auto lock mode with handle in open condition and handle lock component in first position, in accordance with an embodiment of the present disclosure.
[0025] FIG. 1I illustrates a profile feature made in the bezel that allows the handle lock component to stay in two distinct positions with compression spring, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0026] 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.
[0027] 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.
[0028] The present disclosure relates, in general, to draw-out relay, and more specifically, relates to a handle locking arrangement for draw-out relay to enable the locking/unlocking through automated and manual modes.
[0029] The present invention relates to handle lock design for draw-out relay to provide auto locking and dual methods for unlocking. The handle lock component is assembled in bezel component along with a compression spring. The compression spring and a profile feature made in the bezel allows the handle lock component to stay in two distinct positions. The position of the handle lock component is changed by pushing and rotating the handle lock component either clockwise or counterclockwise by 90 degrees. The first position of the handle lock component allows the handle to lock and unlock automatically. The second position of the handle lock component allows the handle to lock automatically and unlock manually. 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 term “relay” as used herein refers to an electrical switch with electromagnet or solid-state devices along with required logic inbuilt to operate the main switch for an intended function.
[0031] The term “feeder protection” as used herein refers to relays that are widely used at the feeder levels in the electrical circuit for monitoring the effective functioning of feeder.
[0032] The term “Bezel” as used herein refers to holding and securing the PCB boards and acts as the user interface for display and navigation.
[0033] The term “handle” as used herein refers to operating the draw-out module for draw-in and draw-out operation.
[0034] The term “handle lock” as used herein for locking the handle after inserting the draw-out module. also, it provides dual unlocking methods of operation.
[0035] The advantages achieved by the handle-locking arrangement of the present disclosure can be clear from the embodiments provided herein. The handle locking arrangement provides reliable locking to avoid the opening of the draw-out module during vibration. The handle locking arrangement provides easy locking and dual unlocking methods as per user requirements. The handle locking arrangement offers both automatic and manual means of locking and unlocking, providing users with flexibility and adaptability to suit their specific requirements and preferences. The handle locking arrangement mitigates the risk of damage to internal components by securely enclosing them within the bezel, safeguarding them against external elements or impacts. 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.
[0036] Referring to FIG. 1A to FIG. 1F, handle locking arrangement 100 for the withdrawable relay is disclosed. The handle locking arrangement 100 can include bezel 102, handle 104, handle lock 106, profile contour 108, and compression spring 110. The handle locking arrangement 100 can include several components that operate together to provide both automatic and manual modes of locking and unlocking.
[0037] The handle locking arrangement 100 is configured to enable multiple reliable locking and unlocking arrangements for the user.
• Automated mode: Automated locking during closing and automated unlocking during opening of the handle.
• Manual mode: Automated locking during closing and manual unlocking during opening of handle.
• Automated locking of handle irrespective of automated or manual mode
• Quarter / 90 deg turn for automated to manual mode change
[0038] The bezel 102 is an outer casing or frame that houses the handle lock assembly. It provides a protective enclosure for the internal components of the handle lock assembly. The bezel 102 can include a profile contour 108(also referred to as profile feature 108, herein) that interacts with the handle lock component 106 to facilitate its two distinct positions. The bezel 102 incorporates the profile contour 108 shown in FIG. 1I within the bezel 102 enables the handle lock component to remain in distinct positions, facilitated by the compression spring 110.
[0039] The handle 104 is depicted in FIG. 1A coupled to the bezel 102 adapted to move from a close position to an open position. In FIG. 1A of the present disclosure, an exemplary isometric view of the bezel 102, featuring the handle 104 in both its closed and open conditions, is depicted. The handle 104 is the part of the arrangement that the user interacts with to lock or unlock the mechanism. The handle 104 can include a circular aperture, through which the handle lock component 106 engage and disengage, thereby effecting the locking and unlocking of the handle 104. In the closed condition, the handle 104 is securely positioned within the bezel 102, ensuring proper containment. Conversely, in the open condition, the handle 104 is extended outwards, allowing for user interaction. This configuration exemplifies the operational versatility and user-friendly nature of the disclosed.
[0040] FIG. 1B illustrates an exploded view of all the assembly components, in accordance with an embodiment of the present disclosure. The components, including the bezel 102, handle 104, handle lock component 106 and compression spring 110 are distinctly displayed, elucidating their respective positions and interconnections within the assembly. This comprehensive depiction serves to enhance understanding and facilitate efficient assembly of the disclosed handle locking arrangement 100.
[0041] FIG. 1C illustrates the dual position of the handle lock component after closing the handle where the right side image illustrates the first position and the left side image illustrates the second position of handle lock component, in accordance with an embodiment of the present disclosure. The dual-position depiction of the handle lock component 106 is presented, showcasing its capability to facilitate either manual unlocking or automated unlocking modes. This pivotal feature allows the handle 102 to operate in two distinct modes, affording users the flexibility to choose between manual intervention for unlocking or automatic unlocking as per operational requirements.
[0042] FIG. 1D illustrates an isometric view of the handle lock component, in accordance with an embodiment of the present disclosure. In FIG. 1D of the present disclosure, an isometric view of the handle lock component 106 is provided, offering a detailed representation of its structural configuration. This depiction serves to facilitate efficient assembly and operation of the disclosed handle locking arrangement. The handle lock component 106 is of cylindrical form, with one end possessing an aperture to accommodate the compression spring 110.
[0043] The handle lock component 106 shown in FIG. 1D accommodated in the bezel 102, where the position of the handle lock component 106 is adjustable by applying axial force to push the handle lock component 106 inward, followed by rotation in either a clockwise or counterclockwise direction, enabling both manual and automated operation for locking and unlocking of the handle 104. The handle lock component 106 is switchable between the distinct positions by applying the axial force to push the handle lock component 106 inward, followed by rotating the handle lock component 106 by a predefined angle in either the clockwise or counterclockwise direction. The distinct positions include a first position and a second position of the handle lock component 106. The handle lock component 106 is rotated by the predefined angle of 90 degrees.
[0044] FIG. 1E illustrates manual unlock mode with handle in the closed condition and handle lock component in second position, in accordance with an embodiment of the present disclosure. In FIG. 1E of the present disclosure, an illustration is presented, demonstrating the manual unlocking mode while the handle 104 is in the closed position. This configuration highlights the handle locking arrangement's ability to secure the mechanism, while still allowing for manual unlocking when necessary.
[0045] FIG. 1F illustrates auto lock mode with handle in open condition and handle lock component in second position, in accordance with an embodiment of the present disclosure. In FIG. 1F of the present disclosure, an illustration is provided, exemplifying the auto locking mode while the handle 104 is in the open position. This configuration highlights the handle locking arrangement's capacity with the option for auto locking by the user.
[0046] FIG. 1G illustrates auto-unlock mode with handle in closed condition and handle lock component in first position, in accordance with an embodiment of the present disclosure. In FIG. 1G of the present disclosure, an illustration is presented, showcasing the auto-unlocking mode while the handle 104 is in the closed position. This configuration highlights the handle unlocking arrangement's 100 capability to automatically unlock the locking mechanism.
[0047] FIG. 1H illustrates auto lock mode with handle in open condition and handle lock component in first position, in accordance with an embodiment of the present disclosure. In FIG. 1H of the present disclosure, an illustration is provided, demonstrating the auto locking mode while the handle is in the open position. This configuration emphasizes the handle locking arrangement's capacity to automatically engage the locking mechanism.
[0048] The first position of the handle lock component 106 allows the handle 104 to lock and unlock automatically without manual intervention. The second position of the handle lock component 106 allows the handle 104 to lock automatically and unlock manually. The compression spring 110 accommodated within the handle lock component imparts the necessary force for transitioning the handle lock component 106 between the distinct positions.
[0049] FIG. 1I illustrates a profile feature made in the bezel that allows the handle lock component to stay in two distinct positions with the compression spring, in accordance with an embodiment of the present disclosure. In FIG. 1I of the present disclosure, the profile feature 108 integrated within the bezel 102 is depicted, facilitating the dual-position stability of the handle lock component 106 in conjunction with the compression spring 110. This feature is instrumental in maintaining the handle lock component 106 securely in either of its two defined positions. The compression spring 110 operating in tandem with this profile feature, ensures reliable and consistent functioning of the handle locking arrangement, enhancing its operational efficiency and performance.
[0050] The compression spring 110 assembled within the bezel 102 in conjunction with the handle lock component 106, exerts pressure to maintain the handle lock component 106 in the distinct positions. The compression spring 110 is another mechanical spring that is assembled within the bezel 102 along with the handle lock component 106. It plays a critical role in transitioning the handle lock component 106 in between its two distinct positions by applying pressure.
[0051] In an implementation, the handle lock component 106 is assembled within the bezel 102 along with the compression spring 110. The compression spring 110 and the profile feature 108 in the bezel 102 operate together to maintain the handle lock component 106 in one of two positions. By pushing and rotating the handle lock component 106 by 90 degrees, either clockwise or counterclockwise, it can be switched between its first and second positions.
[0052] First Position: In the first position, the handle lock component 106 allows for automatic locking and unlocking of the handle 104. The handle 104 can move freely for both locking and unlocking actions without manual intervention.
[0053] Second Position: In the second position, the handle lock component 106 allows for automatic locking but manual unlocking of the handle 104. The handle can be automatically locked, but the user must manually unlock it.
[0054] Handle lock component 106 is assembled in the bezel 102 along with the compression spring 110. Compression spring 110 along with profile feature design in the bezel 102 allows handle lock component 106 to remain in two distinct positions 90 degrees apart. The position of handle lock component 106 is changed by pushing inside and rotating the handle lock component 106 in either clockwise or counterclockwise by 90 degrees. First position of handle lock component 106 allows the handle 104 to lock and unlock automatically i.e., auto mode. Second position of handle lock component 106 allows the handle to lock automatically but unlock manually i.e., manual mode. This locking system is a fail-safe design, where in case of any damage to the lock component, the handle 104 can still lock and unlock i.e., Auto mode with inbuilt snap feature in the bezel 102.
[0055] Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and provides a handle-locking arrangement that provides reliable locking to avoid opening of draw-out module during vibration. The handle locking arrangement provides easy locking and dual unlocking methods as per user requirements. The handle-locking arrangement offers both automatic and manual means of locking and unlocking, providing users with flexibility and adaptability to suit their specific requirements and preferences. The handle-locking arrangement mitigates the risk of damage to internal components by securely enclosing them within the bezel, safeguarding them against external elements or impacts.
[0056] It will be apparent to those skilled in the art that the handle locking arrangement 100 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
[0057] The present disclosure is to provide a handle locking arrangement that provides reliable locking to avoid the opening of the draw-out module during vibration.
[0058] The present disclosure is to provide a handle locking arrangement that provides easy locking and dual unlocking methods as per user requirements.
[0059] The present disclosure is to provide a handle-locking arrangement that offers both automatic and manual means of locking and unlocking, providing users with flexibility and adaptability to suit their specific requirements and preferences.
[0060] The present disclosure is to provide a handle-locking arrangement that mitigates the risk of damage to internal components by securely enclosing them within the bezel, safeguarding against external elements or impacts.

, Claims:1. A handle locking arrangement (100) for withdrawable relay, the handle locking arrangement comprising:
a bezel (102) configured as an outer casing accommodates handle lock assembly;
a handle (104) coupled to the bezel adapted to move from close position to open position;
a handle lock component (106) accommodated in the bezel, wherein the position of the handle lock component (106) is adjustable by applying axial force to push the handle lock component (106) inward, followed by rotation in either a clockwise or counterclockwise direction, enabling both manual and automated operation for locking and unlocking of the handle; and
a compression spring (110) assembled within the bezel (102) in conjunction with the handle lock component (106), imparts necessary force for transitioning the handle lock component between the distinct positions and exerting pressure to maintain the handle lock component (106) in the distinct positions.
2. The handle locking arrangement as claimed in claim 1, wherein the handle (104) comprises a circular aperture, through which the handle lock component (106) engage and disengage, thereby effecting the locking and unlocking of the handle.
3. The handle locking arrangement as claimed in claim 1, wherein the handle (104) in
the closed position is securely positioned within the bezel, ensuring proper containment and the handle (104) in the open position is extended outwards, allowing for user interaction.
4. The handle locking arrangement as claimed in claim 1, wherein the handle lock component (106) is switchable between the distinct positions by applying axial force to push the handle lock component (106) inward, followed by rotating the handle lock component (106) by a predefined angle in either the clockwise or counterclockwise direction, the distinct positions comprise a first position and a second positions of the handle lock component (106).
5. The handle locking arrangement as claimed in claim 1, wherein the handle lock component (106) is rotated by the predefined angle of 90 degrees.
6. The handle locking arrangement as claimed in claim 1, wherein the handle lock component (106) is of cylindrical form, with one end possessing an aperture to accommodate the compression spring (110)
7. The handle locking arrangement as claimed in claim 1, wherein the first position of the handle lock component (106) allows the handle (104) to lock and unlock automatically without manual intervention.
8. The handle locking arrangement as claimed in claim 1, wherein the second position of the handle lock component (106) allows the handle (104) to lock automatically and unlock manually.
9. The handle locking arrangement as claimed in claim 1, wherein the bezel (102) incorporating a profile contour (108) within the bezel enables the handle lock component (106) to remain in the distinct positions, facilitated by the compression spring.