for purposes of description herein , the terms “ upper ,” “ lower ,” “ right ,” “ left ,” “ rear ,” “ front ,” “ vertical ,” “ horizontal ,” and derivatives thereof shall relate to the invention as oriented in fig1 . however , it is to be understood that the invention may assume various alternative orientations , except where expressly specified to the contrary . it is also to be understood that the specific devices and processes illustrated in the attached drawings , and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims . hence , specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting , unless the claims expressly state otherwise . with reference to fig1 , a vehicle exterior door handle assembly 1 includes a handle strap 5 having a forward end 6 that is rotatably mounted to handle reinforcing structure 10 for rotation about a vertical pivot pin / axis 12 . a rearward end 7 of handle strap 5 includes a hook or plunger 8 ( see also fig2 ) that connects to a bellcrank 15 in a known manner . bellcrank 15 is operably connected to a vehicle latch 16 ( fig2 ) by a mechanical connector such as a rod 17 ( or cable ) to thereby actuate the latch 16 upon movement of the handle strap 5 . outward rotation of handle strap 5 as indicated by the arrow “ a ” ( fig1 and 2 ) rotates bellcrank 15 as shown by the arrow “ b ” ( fig2 ), thereby releasing latch 16 via rod 17 in a known manner . referring again to fig2 , bellcrank 15 includes a first arm 20 having a counter - mass 22 rigidly connected to an outer end 24 of first arm 20 . bellcrank 15 also includes a second arm 26 that is operably interconnected with hook or plunger 8 of handle strap 5 in a known manner . bellcrank 15 pivots about a horizontal pin 28 to thereby rotatably interconnect bellcrank 15 with handle reinforcement structure 10 . in the event the handle assembly 1 experiences side acceleration that generates a force acting on handle strap 5 in the direction of the arrow a , a counter force a1 is generated by counter - mass 22 , thereby reducing or eliminating the tendency of handle strap 5 to shift outwardly . the construction of counter mass 22 and bellcrank 15 may be of a known design , and will therefore not be further described in detail herein . bellcrank 15 also includes a third arm 30 ( see also fig6 and 7 ) that comprises a counter - mass lever . lever 30 is rigidly interconnected with arms 20 and 26 , and rotates therewith about pivot end 28 . an inertia lock lever 32 is rotatably interconnected to handle reinforcement structure 10 by a pin 34 for rotation about a vertical axis . an extension 36 of inertia lock lever 32 selectively rotates to a position directly adjacent third arm 30 of bellcrank 15 to prevent rotation of bellcrank 15 in the direction of the arrow b . a mass portion 38 of inertia lock lever 32 generates a force tending to pivot the inertia lock lever 32 about vertical axis v if a side acceleration is present , thereby causing the extension 36 to rotate into a blocked or locked position as shown in fig7 wherein the extension 36 prevents downward rotation / movement of third arm 30 of bellcrank 15 , thereby preventing rotation of bellcrank 15 in the direction of the arrow “ b ” ( fig2 ). a spring ( not shown ) may bias the inertia lock lever 32 in an opposite direction to thereby shift the extension 36 to an unblocked position permitting movement of bellcrank 15 if no side acceleration is present . it will be understood that this aspect of inertia lock lever 32 may be substantially the same as known inertia lock devices . with further reference to fig3 - 7 , application of a force f on the handle assembly 1 ( when installed in a motor vehicle ) will cause handle reinforcement structure 10 to fracture along a fracture line or line of weakening 40 that is designed into handle reinforcement structure 10 . after the reinforcing structure 10 fractures , a fracture line or gap 48 ( fig4 ) is formed where the line of weakening 40 ( fig3 ) had been . reinforcing structure 10 includes an extension 45 having a pushing surface 46 . when handle reinforcing structure 10 fractures along line of weakening 40 , it forms a first part 10 a , and a second part 10 b . the second part 10 b will tend to rotate relative to the first part 10 a to open the gap 48 , and handle strap 5 and bezel 11 will tend to remain attached to first portion 10 a of handle reinforcing structure 10 . as the first and second parts 10 a and 10 b of handle reinforcing structure 10 rotate , pushing surface 46 of extension 45 contacts end 50 of inertia lock lever 32 , thereby driving inertia lock lever 32 into a locked position wherein extension 36 of inertia lock lever 32 locks / prevents rotation of third arm 30 to thereby prevent rotation of bellcrank 15 . thus , in the event the vehicle experiences a side impact in the vicinity of the handle assembly 1 , a force f due to the impact will tend to fracture reinforcing structure 10 , causing pushing surface 46 to push on inertia lock lever 32 to a locking position to thereby prevent unlatching of latch 16 . with further reference to fig5 , reinforcing structure 10 may include a sidewall 52 , and end walls or lips 54 . reinforcing structure 10 may include one or more internal reinforcing ribs 56 and / or reinforcing walls 58 or other such structures . the thicknesses of the sidewall 52 endwall 54 , reinforcing rib 56 and / or reinforcing wall 58 may be reduced in the vicinity of the fracture line 40 to create a line of weakening at which the handle reinforcing structure 10 fractures . also , one or more of the reinforcing structures 56 and 58 may be discontinued in the vicinity of the line of weakening 40 to further ensure that the reinforcing structure 10 fractures along the line of weakening 40 in the event a force f is applied to the handle assembly 1 . it will be understood that the reinforcing structure 10 may have a variety of configurations shapes , etc . to accommodate the needs of a particular application . in the illustrated example , the handle reinforcing structure 10 is made of a molded polymer material , as is the bezel 11 . however , other materials may also be utilized , depending upon the requirements of a particular application . the line of weakening 40 and push surface 46 ensure that the inertia lock lever 32 is pushed / shifted into a locked position to prevent unlatching of latch 16 in the event a force f is applied to the vehicle in the vicinity of handle assembly 1 . it will understood that the force f may cause fracture of handle reinforcing structure 10 and subsequent locking of inertia lock lever 32 if a sufficient force is present , regardless of whether or not a large lateral acceleration is present . it is to be understood that variations and modifications can be made on the aforementioned structure without departing from the concepts of the present invention , and further it is to be understood that such concepts are intended to be covered by the following claims unless these claims by their language expressly state otherwise .