WO2018118281A1

WO2018118281A1 - Frameless door handle assembly with modular inertia locking mechanism

Info

Publication number: WO2018118281A1
Application number: PCT/US2017/061687
Authority: WO
Inventors: Ravindra S. DESAI; Virupaxi P; Nidhin K; Nasir HONGAL
Original assignee: Illinois Tool Works Inc.
Priority date: 2016-12-23
Filing date: 2017-11-15
Publication date: 2018-06-28
Also published as: CN110073070B; CN110073070A

Abstract

A door handle assembly for a vehicle has a handle assembly having a handle and a hook assembly on one end and a cap assembly on other end, assembled into the handle opening in the vehicle door panel. The cap assembly has an outer cap, inertia casket assembly snapped inside the cap and a bell crank assembly to control latching of the door. The inertia casket assembly has a casket and a leaf spring loaded ball contained within the casket. When there is a side impact or no operation of cap, the casket ball alone will move and actuate the spring to resist the actuation of the bell crank activator and the bell crank towards the door unlatching direction.

Description

FRAMELESS DOOR HANDLE ASSEMBLY WITH MODULAR INERTIA LOCKING MECHANISM

Related Applications:

[0001] This application relates to and claims priority benefits from INDIAN Patent Application No. 201641044100, entitled "Frameless Door Handle Assembly With Modular Inertia Locking Mechanism," filed December 23, 2016, which is hereby incorporated by reference in its entirety.

Field of invention:

[0002] The present invention relates to door handle assembly and more particularly to frameless door handle assembly with a safety system such as modular inertia locking mechanism to provide safety against unintentional door opening which may occur during the vehicle collision.

Background of the invention:

[0003] The conventional door handles have frame assembly parts placed on the door panel which acts as a handle assembly reinforcement. However such frame type door handle assembly will increase the number of parts and weight of the door handle assembly. Further the frame type door handle assembly have disadvantage that it creates very bulky design leading to requirement of more space. In order to overcome such disadvantages frameless door handle assemblies are developed.

[0004] The frameless door handle assemblies usually have a handle portion that is pivotable relative to a base portion, and such vehicle doors typically include a latch mechanism for latching and unlatching the door. The handle assembly positioned on the door assembly is operative to control the latch mechanism and a lock mechanism to selectively render the handle assembly effective or ineffective to operate the latch. The frameless door handle assembly is installed from outside of the vehicle by inserting the door handle assembly through an aperture in the outer skin of the vehicle door and then fastened through nut and screw at the respective side portions of the door handle assembly.

[0005] The major disadvantage with the existing frameless door handle assembly is that the handle portion tends to swing or pivot outward during a vehicle collision and may open the door of the vehicle during the collision. The side impact against the vehicle, resulting for example from a clash, result in the unintentional movement of the handle assembly to a latch release position with consequent movement of the latch to an unlatched position and an unintentional opening of the door.

[0006] The secure control of the vehicle door is in general is not a problem when the door is in locked or latched position. As is most typically the case in an operating the vehicle, side impact can easily result in inertial movement of the vehicle door handle to its unlatched position with consequent discharge and injury of unbuckled vehicle passengers from the vehicle.

[0007] Various attempts have been made to overcome the side impact problem and specifically to avoid unintentional opening of the vehicle door in a side impact situation. The most commonly used method is to arrange the heavy duty counter weight consideration but that also not possible on this handle assembly because of the space and weight limitation. Further this will lead the door handle assembly very difficult to open, and this conventional arrangement has the disadvantage that the side impact forces of the door handle assembly can withstand without unintentional opening of the door.

[0008] Moreover, the conventional arrangement to overcome the effect of impact problem is more complicated and incurs more expensive installation techniques. Further the existing locking mechanism in the door handle assembly against the collision and unintentional opening are made of die cast parts with pivotally rotatable, which can block the travel during particular side impacts but not permanent blocking.

[0009] Therefore it is desirable to provide an improved frameless door handle assembly which overcomes the disadvantages of conventional locking mechanism, and also capable of providing modular inertial lock mechanism as safety system against unintentional door opening which may occur during vehicle collision.

Object of the invention

[0010] The main object of the present invention is to provide a safety device to assure safety of frameless vehicle door handle assemblies and prevent unintentional opening of the door latch.

[0011] Another object of the present invention is to provide an improved frameless door handle assembly resisting an unintentional opening of the door inside impact.

[0012] Another object of the present invention is to provide an improved frameless door handle assembly which allows the insertion of the door handle assembly through an aperture in the outer skin of the door to simplify installation.

[0013] Further object of the present invention is to provide a frameless door handle assembly having modular inertia lock mechanism to resist the movement of handle to unlatch direction during impact of vehicle collision.

[0014] Further object of the present invention is to provide a frameless door handle assembly which resists the opening movement of the handle unintentionally.

[0015] Further object of the present invention is to provide a frameless door handle assembly with simple and cost effective installation steps for assembling the door handle assembly with the vehicle door.

Summary of the invention:

[0016] The present invention which achieves the objectives relates to door handle assembly with a safety system such as modular inertia lock mechanism to provide safety against unintentional door opening which may occur during the vehicle collision.

The safety device in the vehicle door handle assembly according to the present invention is intended for resisting the unintentional opening of door handle and controlling the latch of the vehicle door, thereby providing safety against lateral mechanical shocks as may occur against vehicle collision.

[0017] The door handle assembly has a handle and a hook assembly on one end and a cap assembly on other end, assembled into the handle opening in the vehicle door panel. The handle assembly is installed on the door panel by passing the handle assembly through an opening in the outer skin of the door panel. The hook assembly has a panel locking hook pivotally fixed through a pivot pin and fastened with the door panel through a screw and nut. The cap assembly has an outer cap, inertia casket assembly snapped inside the cap and a bell crank assembly constructed to connect with the door latch assembly and to control latching of the door.

[0018] The bell crank assembly has a bell crank and a bell crank activator housed in the bell crank to actuate the bell crank for latching and delatching of the latch in the door. The bell crank is pivotally fixed through a pivot pin and with a spring load, with the cap such that the operation of cap activates the bell crank activator for movement of the bell crank to a door unlatching direction. An abutment is formed at one end of the bell crank to connect with the latch assembly of the door and to control latching and delatching of the latch in the door. The bell crank rotates around the axis of the bell crank, when activated by the bell crank activator and converts the rotary movement of said handle to linear movement of the latch.

[0019] The inertia casket assembly has a casket and a leaf spring loaded ball contained within the casket. The operation of the cap provides the movement of the casket assembly having the casket ball and leaf spring and allows the bell crank activator to activate the bell crank to move towards the unlatching direction. Whenever there is side impact or vehicle collision, due to the inertia the casket ball and spring alone will move and thus actuating the leaf spring to resist the bell crank activator and bell crank to an unlatching direction.

[0020] The leaf spring is constructed to generate a proximate force resisting movement of the bell crank in an unlatching direction and thus the bell crank activator is controlled by the leaf spring of the inertia casket assembly, whenever the spring is actuated. The operation of the handle cap provides the movement of the casket assembly having casket and the ball and allows movement of bell crank activator to a door unlatching direction. The bell crank activator and the bell crank are resisted by the leaf spring of the inertia casket assembly, when there is no operation of cap.

[0021] In another embodiment of the present invention, the frameless handle is made as a single body with a safety system such as modular inertia lock. The door handle assembly has made as a single handle (11 A) and without the cap part. This type door handle assembly is intended to reduce the number of parts and weight of the door handle assembly. The handle assembly is assembled into the handle opening (30) provided in the vehicle door panel (10).

[0022] According to the present invention the inertia casket assembly is inertial operative to generate a force resisting movement of the handle in an unlatching direction. This arrangement allows the door handle to resist opening movement of the handle unintentionally.

[0023] The present invention allows resisting the unlatching movement of handle assembly in response to a side impact of the vehicle proximate the handle assembly acts against the impact direction. The door handle assembly according to the present invention provides a simple and effective means for resisting movement of the handle mechanism in an unlatching direction unintentionally.

Brief description of Drawings

[0024] Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same.

[0025] Fig. 1 shows an assembled view of the door handle assembly for the vehicle door, in accordance to an embodiment of the present invention.

[0026] Fig. 2 shows a view of installation view of the handle assembly in the vehicle door, in accordance to the present invention. [0027] Fig. 3A & 3B shows a view of the door handle assembly assembled in the vehicle door, in accordance to the present invention.

[0028] Fig. 4 A & 4B shows the views of initial position and actuated position of the door handle assembly, in accordance to the present invention.

[0029] Fig. 5A & 5B shows the views of the initial position and operated position of the leaf spring in the casket assembly, in accordance to the present invention.

[0030] Fig. 6A, 6B, 6C & 6D shows the views of the initial position and operated position of the casket inertia lock mechanism, in accordance to the present invention.

[0031] Fig. 7A shows a view of the single body door handle, in accordance to another embodiment of the present invention.

[0032] Fig. 7B shows an assembly view of the frameless door handle assembly, in accordance to another embodiment of the present invention.

Detailed description

[0033] The present invention relates to a safety device in vehicle door handle assemblies providing safety against lateral mechanical shocks that may occur against the vehicle collision or during a side impact of the vehicle. Fig. 1 shows an assembled view of the door handle assembly for the vehicle door, in accordance to the present invention. The door handle assembly has a handle (11) and a hook assembly (12) on one end and a cap assembly (13) on other end, assembled into the handle opening (30) provided in the vehicle door panel (10). The handle assembly is installed on the door panel (10) by passing the handle assembly through an opening (30) in the outer skin of the door panel. The hook assembly (12) has a panel locking hook (25) pivoted fixed through a pivot pin (26) and fastened through a screw (27) and nut (28) with the door panel.

[0034] The cap assembly (13) has an outer cap (14), inertia casket assembly (15) snapped inside the cap and a bell crank assembly (16) constructed to connect with the door latch assembly and to control latching of the door. The bell crank assembly has a bell crank (17) and a bell crank activator (18) housed in the bell crank to actuate the bell crank for latching and delatching of the latch in the door. The bell crank (17) is pivotally fixed through a pivot pin (23) and with a spring load (24), with the cap such that the operation of cap (14) activates the bell crank activator for movement of the bell crank (17) to a door unlatching direction.

[0035] The bell crank (17) rotates around the axis of the bell crank, when activated by the bell crank activator (18) and converts the movement from the handle cap (14) to linear movement of the latch to control the opening of the door. The bell crank assembly (16) has a bracket and is fixed with the housing at one end and a bell crank (17) and is pivotally fixed to the other end of the bracket. A counter weight (32) provided with the bell crank at the pivotal end and to generate a proximate force resisting the movement of the handle in a latching direction. The primary function of the bell crank (17) is to convert the rotary movement of the handle into linear movement of the bowden cable / link rod (not shown) connected to the door latch (not shown).

[0036] The bell crank assembly (16) consists of abutment (22) provided at one end of the bell crank to connect with the latch of the vehicle door. The abutment (22) is preferably snapped on the bell crank (17). The abutment (22) arrests the position of the cable end which in turn helps to activate the latch. The Bell crank (17) is then assembled on the bracket with the help of the pivot pin (26). The bell crank is enabled to convert rotary movement of the handle to linear movement of the Bowden cable / link rod (not shown) to the latch (not shown). The bell crank (29) is assembled with the bracket (28) through a spring load to keep the bell crank in a required position.

[0037] The bell crank activator (18) is formed such that the activator activates the bell crank whenever the handle cap (14) is operated. The movement of the handle cap is first transmitted to the bell crank activator, which then transmitted to the bell crank (17) for latching and unlatching of the door. The counter weights (32) are calculated and assembled with the bell crank and in the bell crank assembly (16), such that the bell crank (17) is enabled to release the latch in the door for intentional opening of the door handle. [0038] The inertia casket assembly (15) has a casket (19) and a leaf spring (21) loaded casket ball (20) contained within the casket. The operation of the cap (14) provides the movement of the casket (19) and the ball (20) and allows the bell crank activator to activate the bell crank and enable movement of the bell crank movement towards an unlatching direction. The operation of the cap (14) moves the casket and the spring and allows the bell crank activator (18) to activate the bell crank to an unlatching direction, and when there is no operation of cap, the spring (21) resist the actuation of the bell crank activator (18) and control the bell crank towards the door unlatching direction. The doors handle assembly according to the present invention thus controlling the latch of the vehicle door.

[0039] Fig. 2 shows a view of installation view of the handle assembly in the vehicle door, in accordance to the present invention. The handle assembly is installed on the door panel (10) by passing the handle assembly through the opening (30) in the outer skin of the door panel. The handle assembly is enabled to control the opening of the door as well as to perform the latching and delatching operation of the door latch. A cushion (29) is provided with the outer periphery of the cap assembly (13) to assemble at the mating face of the handle assembly with the door panel (10).

[0040] The hook assembly (12) and cap assembly (13) are inserted and assembled with the door panel. The hook assembly (12) is pivotally connected with the door to enable the smooth operation of handle in opening and closing of the door. The cap assembly (13) is first assembled and then inserted into the vehicle door opening and followed by this the hook assembly (12) is inserted and fastened with the provisions on the vehicle door (10). The hook assembly (12) is assembled with the door using fasteners such as screws (27) and nut (28) to form rigid assembly of housing with the vehicle door.

[0041] Fig. 3A & 3B shows a view of the door handle assembly assembled in the vehicle door, in accordance to the present invention. The handle (11) is pivotally connected with the hook assembly (12) to enable the opening and closing of the door. The cushion (29) is placed in the outer peripheral surface of the handle assembly to contact with the vehicle door. The door panel (10) is provided with necessary opening (30) to precisely accommodate the door handle assembly and allows the operation of the door handle for opening and closing of the door. The latch assembly (not shown) provided with the door panel (10) and assembled such that the actuation of the door handle (11) through the bell crank assembly (16) will actuate the latch for latching and unlatching of the vehicle door.

[0042] The casket inertial assembly (15) and the bell crank assembly (16) are assembled with the cap assembly and then the cap assembly is inserted into the opening in the vehicle door. The abutment (22) placed with the bell crank (17) is placed to communicate with the latch assembly for latching and delatching of the vehicle door. The door handle assembly is installed on the door by passing the handle assembly through the opening (30) in the outer skin of the door, thereby combining the effectiveness of the casket inertia arrangement (15) in precluding inadvertent unlatching of the door in a side impact scenario with the simplicity and cost efficiencies of installation through an aperture in the outer skin of the door. The handle assembly has a bell crank spring (24) to keep the handle in a closed condition, such that the handle (11) will be moved in the direction resisting the spring load. Whenever the handle is released the spring load with the handle makes the handle to revert back to the original closed condition of the door handle.

[0043] Fig. 4A & 4B shows the views of initial position and actuated position of the door handle assembly, in accordance to the present invention. The spring loaded ball (20) is movably assembled within the casket (15) and the casket assembly is snapped with the cap (14) of the handle assembly. The bell crank assembly (16) helps in functioning of the door handle, such that while opening the door handle, the bell crank (17) with counter weights (32) moves to unlatching direction of the door. When the handle cap (14) in operated, the casket in the casket inertia assembly also moves and do not resist the movement of the bell crank activator. The bell crank activator (18) activates the spring loaded bell crank to rotate around its axis and this in turn helps to revolve the abutment (22) along its axis. This combined action of the handle cap (14), casket (19), bell crank (17, bell crank activator (18) and the abutment (22) helps to convert the movement of the door handle to linear movement of the cable / latch part which activates the latch assembled in the vehicle door to an unlatching direction. [0044] When there is a side impact of vehicle, due to inertia, the casket ball and the spring moves and thus actuating the leaf spring (21) to contact the bell crank activator (18) of the bell crank assembly. Whenever there is no operation of handle (11) or activation of the cap handle (14), the casket (15) will not make a movement and the movement of the ball (20) and the leaf spring (21) will resist the movement of the bell crank activator (18) and generate the proximate force towards resisting the unintentional opening of the door during side impact of the vehicle.

[0045] The leaf spring (21) is constructed to act as a counter weight and generate a proximate force resisting movement of the bell crank (17) in an unlatching direction and thus the bell crank activator (18) is controlled by the leaf spring (21) of the inertia casket assembly, when actuated. This arrangement allows the door handle to resist opening movement of the handle unintentionally. The handle assembly according to the invention is intended to create an improved safety measure on to the door and to conduct the handle operation smoothly with respect to the accepted criteria.

[0046] Fig. 5A & 5B shows the views of the initial position and operated position of the leaf spring in the casket assembly, in accordance to the present invention. The door handle assembly of the invention is intended for controlling the latch travel of the vehicle door having cap assembly (13), a bell crank assembly (16) mounted on the cap (14) for movement in an unlatching direction and in an opposite latching direction of the casket inertia assembly (15) which is snapped onto the handle cap (14). According to the invention apparatus and methodology, the casket inertia mechanism is operative to generate a positive locking movement of the handle mechanism in a latching direction. This arrangement allows the leaf spring (21) to resist opening movement of the handle in unintentional opening of the door and allows the movement of the bell crank during intentional opening of the door.

[0047] Fig. 6A, 6B, 6C & 6D shows the various views of the initial position and operated position of the casket inertia lock mechanism, in accordance to the present invention. The casket (19) is loaded with the ball (20) and the leaf spring (21) and placed within the cap assembly. The movement of the cap enables to move the casket and the ball and thus resulting in actuation of the leaf spring. The leaf spring is configured such that the whenever the ball is moved, the leaf sprig is actuated and thus resisting the actuation of the bell crank actuator.

[0048] The casket assembly enables for blocking or resisting the actuation of the bell crank actuator as per the load condition or permanently. In case of blocking as per load condition, the casket ball will move as per the load applied and that tends to actuate the leaf spring and thus restricting the movement of the handle. But once the load is released, the casket ball and the leaf spring will come to its initial position and that leads to slip out the handle.

[0049] In the case of permanent blocking, the casket ball will move as per the Min load applied and that will move to permanent Blocking position and tends to actuate the leaf spring and thus restrict the movement of the handle. But in this case the Ball will not come in its initial position due to permanent blocking features. So Door can be opened after crash with higher force (around 60kg) by damaging Buckling the leaf spring to take passengers out of vehicle.

[0050] Fig. 7A & 7B shows various views of the frameless door handle assembly, in accordance to another embodiment of the present invention. According to this embodiment, the frameless handle assembly (11 A) is made as a single assembly with a safety system such as modular inertia lock. The door handle assembly has made as a single handle (11 A) and without the cap part. This type door handle assembly is intended to reduce the number of parts and weight of the door handle assembly. The handle assembly is assembled into the handle opening (30) provided in the vehicle door panel (10). The handle assembly is installed on the door panel (10) by passing the handle assembly through an opening (30) in the outer skin of the door panel. The hook assembly (12) has a panel locking hook pivoted fixed through a pivot pin and fastened with the door panel.

[0051] The frameless single body handle door assembly (11 A) has a hook assembly (12) on one end and an inertia casket assembly (15) and a bell crank assembly (16) on the other end, wherein said bell crank assembly is constructed to connect with the door latch assembly and to control latching of the door. The hook assembly has a panel locking hook (25) pivotally fixed through a pivot pin (26) and fastened with the door panel (10) through a screw (27) and nut (28). The handle assembly is installed on the door panel (10) by passing the handle assembly through an opening (30) in the outer skin of the door panel.

[0052] The casket assembly is snapped inside the handle and a bell crank assembly (16) constructed to connect with the door latch assembly and to control latching of the door. The bell crank assembly (16) has a bell crank (17) and a bell crank activator (18) housed in the bell crank, and the bell crank is pivotally fixed with the handle (11A) such that the operation of handle activates the bell crank activator (18) for movement of the bell crank to a door unlatching direction.

[0053] The inertia casket assembly (15) has a casket (1 ) and a leaf spring loaded ball (20) contained within the casket, and the operation of the handle (11 A) moves the casket inertia assembly and allows the bell crank activator to activate the bell crank to an unlatching direction, and whenever there is a side impact, the casket (19) and the casket ball (20) move in the casket assembly due to inertia and actuate the leaf spring (21) to resist the actuation of the bell crank activator (18) and the bell crank (17) towards the door unlatching direction.

[0054] The bell crank activator ( 18) actuates the bell crank (17) for latching and delatching of the latch in the door and a permanent locking mechanism is incorporated with the assembly to avoid slip out during rebounds. The door can be opened after crash with higher force by damaging the leaf spring to take passengers out of vehicle.

[0055] The frameless single handle assembly according to this embodiment makes a very sleek and stylish design. The frameless single handle assembly with modular inertia lock mechanism developed will eliminate the need to maintain the gap between handle and the cap part, which is very difficult due to part variations.

[0056] The door handle assembly allows the utilization of inertia casket assembly in conjunction with the handle assembly, and thereby combining the effectiveness of the inertia casket arrangement in precluding inadvertent unlatching of the door in a side impact scenario. The present invention is achieved with simplicity and cost efficiencies of installation of the door handle assembly through an aperture in the outer skin of the door.

[0057] The present invention enables to optimize the weight and achieve a compact design with modular Inertia mechanism. The casket inertia assembly (15) and the bell crank assembly 16) are coupled for movement with the handle mechanism in a latching direction. This arrangement allows resisting unlatching movement of handle mechanism in response to an impact against a side of the vehicle proximate the handle assembly act against the impact direction.

[0058] The door handle assembly according to the present invention provides a simple and effective means for allowing the counter weight to resist movement of the handle mechanism in an unlatching direction unintentionally. This improved door handle assembly allows for insertion of the door handle assembly through an aperture in the outer skin of the door, thus simplifying the process of door handle assembly installation.

[0059] The door handle assembly allows for insertion of the door handle assembly through an aperture in the outer skin of the door, thus simplifying the process of door handle assembly installation. The frameless door handle assembly with inertia lock mechanism according to the present invention could be installed on the door by passing the handle assembly through an aperture in the outer panel of the door, thus making a simple, effective and cost efficient arrangement.

[0060] While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiments but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims, which scope is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures as is permitted under the law. Part Numbers:

[0061] Vehicle door panel (10)

[0062] Handle (11)

[0063] Single body Handle (11 A)

[0064] Hook assembly (12)

[0065] Cap assembly (13)

[0066] Outer cap (14)

[0067] Inertia casket assembly (15)

[0068] Bell crank assembly (16)

[0069] Bell crank (17)

[0070] Bell crank activator (18)

[0071] Casket (19)

[0072] Casket Ball (20)

[0073] Casket leaf spring (21)

[0074] Bell crank Abutment (22)

[0075] Bell crank pivot pin (23)

[0076] Bell crank spring (24)

[0077] Panel locking hook (25)

[0078] Pivot pin (26)

[0079] Screw (27)

[0080] Nut (28)

[0081] Cushion (29)

[0082] Door opening for handle assembly (30) [0083] Lock barrel (31) [0084] Counter weight (32)

Claims

We Claim:

1. A frameless door handle assembly with modular inertia locking mechanism comprising:

a handle assembly having a handle and a hook assembly on one end and a cap assembly on other end, assembled into the handle opening in the vehicle door panel; said cap assembly has a handle cap, inertia casket assembly snapped inside the cap and a bell crank assembly constructed to connect with the door latch assembly and to control latching of the door;

said bell crank assembly has a bell crank and a bell crank activator housed in the bell crank, wherein the bell crank is pivotally fixed with the cap such that the operation of cap activates said bell crank activator for movement of the bell crank to a door unlatching direction,

characterized in that said inertia casket assembly has a casket and a leaf spring loaded ball contained within the casket, wherein the operation of the cap moves the casket inertia assembly and allows the bell crank activator to activate the bell crank to an unlatching direction, and whenever there is a side impact, the casket and the casket ball move in the casket assembly due to inertia and actuate the leaf spring to resist the actuation of the bell crank activator and the bell crank towards the door unlatching direction.

2. The frameless door handle assembly as claimed in claim 1, wherein the operation of the cap actuates the casket assembly having casket and the ball and allows the bell crank activator to a door unlatching direction.

3. The frameless door handle assembly as claimed in claim 1, wherein the bell crank activator and the bell crank are resisted by the leaf spring of the inertia casket assembly, when there is no operation of cap.

4. The frameless door handle assembly as claimed in claim 1 , wherein said leaf spring is constructed to generate a proximate force resisting movement of the bell crank in an un latching direction.

5. The frameless door handle assembly as claimed in claim 1 , wherein said bell crank activator actuates said bell crank for latching and delatching of the latch in the door.

6. The frameless door handle assembly as claimed in claim 1, wherein a permanent locking mechanism is incorporated with the assembly to avoid slip out during rebounds.

7. The frameless door handle assembly as claimed in claim 1, wherein the door can be opened after crash with higher force by damaging the leaf spring to take passengers out of vehicle.

8. The frameless door handle assembly as claimed in claim 1, wherein an abutment is formed at one end of the said bell crank to connect with the latch assembly of the door.

9. The frameless door handle assembly as claimed in claim 1, wherein the abutment is formed with said bell crank in a position to control latching and delatching of the latch in the door.

10. The frameless door handle assembly as claimed in claim 1, wherein said bell crank rotates around the axis of the bell crank, when activated by said bell crank activator and converts the rotary movement of said handle to linear movement of the latch.

1 1. The frameless door handle assembly as claimed in claim 1, wherein said bell crank is pivoted through a pivot pin and with a spring load.

12. The frameless door handle assembly as claimed in claim 1, wherein a counter weight is provided with the bell crank to generate the required force to resist the delatching of the door and at the same time allowing the door to open whenever opened intentionally.

11. The frameless door handle assembly as claimed in claim 1 , wherein a lock barrel is provided within the cap assembly to enable secure operation of the cap (14) and the vehicle door.

12. The frameless door handle assembly as claimed in claim 1, wherein said hook assembly has a panel locking hook pivotally fixed through a pivot pin and fastened with the door panel through a screw and nut.

13. The frameless door handle assembly as claimed in claim 1, wherein a cushion is provided with the outer periphery of said cap assembly to assemble at the mating face of the door panel.

14. The frameless door handle assembly as claimed in claim 1, wherein said handle assembly is installed on the door panel by passing the handle assembly through an opening in the outer skin of the door panel.

15. A frameless door handle assembly with modular inertia locking mechanism comprising: a single body handle assembly having a hook assembly on one end and a inertia casket assembly and a bell crank assembly on the other end;

said bell crank assembly has a bell crank and a bell crank activator housed in the bell crank, wherein the bell crank is pivotally fixed with the handle such that the operation of handle activates said bell crank activator for movement of the bell crank to a door unlatching direction,

characterized in that said inertia casket assembly has a casket and a leaf spring loaded ball contained within the casket, wherein the operation of the handle moves the casket inertia assembly and allows the bell crank activator to activate the bell crank to an unlatching direction, and whenever there is a side impact, the casket and the casket ball move in the casket assembly due to inertia and actuate the leaf spring to resist the actuation of the bell crank activator and the bell crank towards the door unlatching direction.

16. The frameless door handle assembly as claimed in claim 15, wherein said bell crank activator actuates said bell crank for latching and delatching of the latch in the door.

17. The frameless door handle assembly as claimed in claim 15, wherein a permanent locking mechanism is incorporated with the assembly to avoid slip out during rebounds.

18. The frameless door handle assembly as claimed in claim 15, wherein the door can be opened after crash with higher force by damaging the leaf spring to take passengers out of vehicle.

19. The frameless door handle assembly as claimed in claim 15, wherein said hook assembly has a panel locking hook pivotally fixed through a pivot pin and fastened with the door panel through a screw and nut.

20. The frameless door handle assembly as claimed in claim 15, wherein said handle assembly is installed on the door panel by passing the handle assembly through an opening in the outer skin of the door panel.