[001] The present subject matter described herein, relates to a vehicle side body structure having increased vehicle durability to counter vertical vibrations arising as a result of suspension loads. Further, the vehicle side body structure also has durability to counter loads from rear seat. More particularly, a rear door striker reinforcement and panel seat back striker are provided at the vehicle side body that are connected with rear wheel house at lower side in vehicle height direction to improve rigidity and mitigating vertical vibrations originating from rear suspensions of the vehicle and loads originating from rear seat back. BACKGROUND AND PRIOR ART:
[002] The vehicle side body structure has a rear pillar which extends from roof to rear wheel house of the vehicle. The rear portion of the vehicle has suspension systems assembled in the rear wheel house. The rear wheel house is generally made in arched shape which encloses an upper side of the rear wheel of the vehicle.
[003] In the vehicle side body structure, a rear door opening is formed in between c-pillar and b-pillar. In other words, the rear door opening is formed forward of the c-pillar and the rear wheel house. A rear door striker is mounted on a portion constituted by the c-pillar and the rear wheel house in vehicle width direction to receive rear door panel of rear door of the vehicle.
[004] Existing vehicle side body structure has several technical problems, such as transmitting vertical loads and vibrations. Further, the c-pillar deforms and bends in vehicle width direction during vertical loads induced by the suspension system. Further, the vehicle side body twists due to torsional loads at rear side end of the vehicle.
[005] Generally, rear door striker reinforcement is provided to support at door striker location. It is usually L-shaped with one face spot welded to quarter panel of the c-pillar and other face spot welded at wheel housing panel. While the

existing reinforcement provides stiffness at door striking region but does not provide enough strength in reducing vibrations due to the suspension loads.
[006] Further, in the existing vehicles, rear seat back striker is mounted on one or more reinforcement of seat back striker that is joined to lower quarter panel. Due to addition of multiple reinforcements at the lower quarter panel welding cost and weight increases. Further, the quarter panel receives loads from the rear seat through seat back striker.
[007] . In another approach, lower quarter panel is provided with more thickness to cater loads from the rear seat. Increase in the thickness ultimately increases cost and weight of the vehicle which is not acceptable for fuel economy point of view. Therefore, there is a need in the art to reinforce the rear seat striker locally without adding extra reinforcement and without increasing weight of the complete lower quarter panel.
[008] Therefore, there is a need in the art to modify the vehicle side body structure that can provide support at rear seat striking region, improve the torsional stiffness and twist performance of the vehicle and cater vertical loads as exist in the conventional designs and structures.
OBJECTS OF THE INVENTION:
[009] The principal object of the present invention is to provide vehicle side body structure with a rear door striker reinforcement.
[0010] Another object of the present subject matter is to provide a vehicle side body structure having a rear door striker reinforcement that is connected to quarter panel of c-pillar and rear wheel house for distribution of vertical loads to avoid bending of the c-pillar.
[0011] Another object of the present subject matter is to provide a vehicle side body structure having a rear door striker reinforcement that provides support at rear seat striking region, improve the torsional stiffness and twist performance of the vehicle.

[0012] Another object of the present subject matter is to provide a vehicle side body structure having lower quarter panel divided into two parts, i.e., panel quarter inner and panel seat back striker, where stiffness of panel seat back striker is more than panel quarter inner.
[0013] Another object of the present subject matter is to reduce the weight of the lower quarter panel by reducing thickness of the panel quarter inner and increasing the local area thickness in the panel seat back striker.
[0014] Another object of the present subject matter is to increase strength of seat back striker mounting structure with minimum increase in thickness of panel locally.
[0015] Another object of the present subject matter is to increase strength of the vehicle side body structure by joining the panel seat back striker with the rear door striker reinforcement.
[0016] Another object of the present subject matter is to provide vehicle side body structure that is cost efficient, easy to manufacture and do-not increase weight of the vehicle.
[0017] Yet another object of the present subject matter is to reduce cost of the vehicle side body structure by reducing thickness of the quarter panel and increasing the thickness locally around the rear seat striker mounting region.
[0018] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION:
[0019] The present subject matter relates to a vehicle side body structure comprising a rear wheel house and a rear pillar connecting roof of the vehicle to the rear wheel house. The rear pillar includes an upper quarter panel and a lower quarter panel where the upper quarter panel is connected with the roof of the vehicle at one end and with the lower quarter panel at other end. The lower

quarter panel is connected with lower end of the upper quarter panel at upper side and upper portion of the rear wheel house at lower side, wherein joining of the upper quarter panel and the lower quarter panel with the rear wheel house constitute a side panel in vehicle width direction (WL) to receive rear door panel of rear door. A rear door striker reinforcement is provided on the side panel to reinforce the rear pillar and the rear door striker mounting region. The rear door striker reinforcement is mounted on the rear wheel house at lower side and with the lower quarter panel at upper side.
[0020] According to the present subject matter, front end of the rear door striker reinforcement elongates in vertical direction (UL) along the lower quarter panel to reinforce the lower quarter panel in vertical direction. Accordingly, rigidity of the rear pillar is increased.
[0021] In an embodiment of the present subject matter, the rear door striker reinforcement includes at least two legs towards rear wheel house. Where one leg from the at least two legs is mounted on upper surface of the rear wheel house in the vehicle width direction (WL) and other leg is mounted on side flange of the rear wheel house in vehicle front direction (FL). Accordingly, the reinforcement distributes the vertically induced loads in all direction to effectively reinforce the rear pillar and increase BIW twisting performance by catering all torsional loads at rear side of the vehicle.
[0022] In an embodiment of the present subject matter, the rear door reinforcement reinforces rear seat striker region of rear seat striker along the lower quarter panel. Accordingly, light weight rear seat back striker reinforcement can be used to further reinforcement.
[0023] In yet another embodiment of the present subject matter, the lower quarter panel is divided into two panels, i.e., panel quarter inner and panel seat back striker. The panel seat back striker receives the seat back striker with light weighted reinforcement. The panel seat back striker has more thickness, nearly double, than the thickness of the panel quarter inner. By providing more thickness to the panel seat back striker, stiffness of the lower quarter panel is improved

locally where loads of seat back are significantly high. Therefore, by increasing the thickness locally, weight of the whole lower quarter panel is decreased which improves fuel economy of the vehicle and decreases cost of the structure. Further, the seat back striker is reinforced by the rear door striker reinforcement at upper 5 end to eliminate requirement of multiple reinforcements for the seat back striker.
[0024] To further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit scope of the present subject matter.
10 BRIEF DESCRIPTION OF THE DRAWINGS
[0025] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the
15 accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example,
20 and with reference to the accompanying figures, in which:
[0026] Fig. 1 illustrates vehicle side body structure with rear door striker reinforcement, in accordance with an embodiment of the present subject matter;
[0027] Fig. 2 illustrates mounting of the rear door striker reinforcement at the vehicle side body structure, in accordance with an embodiment of the present 25 subject matter; and
[0028] Fig. 3 illustrates structure of lower quarter panel to improve local stiffness of vehicle side body structure, in accordance with an embodiment of the present subject matter.
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[0029] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles 5 of the disclosure described herein.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0030] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily
10 utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its scope. Furthermore, all examples recited herein
15 are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both
20 as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.
[0031] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be 25 noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0032] FIG. 1 is a front view of a vehicle side-body structure 100, in accordance 30 with an embodiment of the present subject matter. FIG. 1 shows right side of the
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vehicle from outside of the vehicle. It should be noted that, while not shown, the vehicle side-body structure may also be implemented on the left side of the vehicle. Hereinafter, the arrows UL, FL, and WL shown in the diagrams respectively indicate the upward direction of the vehicle, the front side of the vehicle, and the vehicle 5 width direction.
[0033] As shown in the figures 1 and 2, the vehicle side body structure 100 includes rear pillar 102 and rear wheel house 105. The rear pillar 102 joins roof 101 of the vehicle with the rear wheel house 105 of the vehicle. A rear door opening 107 is formed forward of the rear pillar 102. The rear pillar 102 includes an
10 upper quarter panel 103 and a lower quarter panel 104. The upper quarter panel 103 is connected with the roof 101 of the vehicle at upper end and with a lower quarter panel 104 at lower end. The lower quarter panel 104 is connected with the upper quarter panel 103 at upper side and with rear wheel house 105 at lower end. Further, the lower quarter panel 104 is divided into two panels, i.e., panel quarter inner 104a
15 and panel seat back striker 104b. The rear pillar 102 and the rear wheel house 105 joins with each other to define a side panel in vehicle width direction WL to receive rear door panel of rear door from the rear door opening 107 (as shown in figure 2). A front end 104ba of the lower quarter panel 104 constitute front portion of rearward edge of the rear door opening 107. The front end 104ba of the lower quarter panel
20 104 is connected with side flange 105b of the rear wheel house 105 at lower end to form the side panel.
[0034] As shown in figure 2, a rear door striker reinforcement 106 is mounted on side panel and elongate in vertical direction UL to reinforce the rear pillar 102 of the vehicle. The rear door striker reinforcement 106 elongate in the vehicle width 25 direction along the front end 104ba of the panel seat back striker 104b (which is part of lower quarter panel 104) from the side flange 105b of the rear wheel house 105.
[0035] The rear door striker reinforcement 106 is an elongated member that
elongates between upper end 106f and at least two legs 106a, 106b at lower end.
30 The rear door striker reinforcement 106 and the panel seat back striker 104b are
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continuous with each other and constitute the side panel in vehicle width direction WL.
[0036] The at least two legs 106a, 106b of the rear door striker reinforcement 106 are mounted with the rear wheel house 105. Where one leg 106a is mounted on
5 upper surface 105a of the rear wheel house 105 in vehicle width direction WL and other leg 106b is mounted with the side flange 105b of the rear wheel house 105 in vehicle front side FL in the constituted side panel. The upper end 106f is mounted with the panel quarter inner 104a which is connected with the panel seat back striker 104b. The front end 106c of the rear door striker reinforcement 106 is
10 continuous and elongates with the front end 104ba of the lower quarter panel 104 (combination of panel seat back striker 104b and panel quarter inner 104a) and constitute rearward edge of the rear door opening 107. The front end 106c of the rear door striker reinforcement 106 is mounted with the front end 104ba of the lower quarter panel 104 to increase rigidity of the rear pillar 102. The rear door
15 striker reinforcement 106 is spot welded with the panel quarter inner 104a and the panel seat back striker 104b and the rear wheel house 105.
[0037] There can be other means of mounting also which are known to a person skilled in the art to join the rear door striker reinforcement 106 with the lower quarter panel 104 and the rear wheel house 105. Due to continuous mounting of
20 the front end 106c of the rear door striker reinforcement 106 with the lower quarter panel 104, specifically with the panel seat back striker 104b, provides strength to the rear pillar 102 to suppress the vibrations arising from suspension loads and distributes the suspension loads in the rear wheel house 105 and the lower quarter panel 104. Further, by reinforcing the panel seat back striker 104b,
25 seat back striker 108 is also reinforces in vehicle length direction. By adding the rear door striker reinforcement 106 along with the front end 104ba the lower quarter panel 104, the suspension loads can be effectively minimized. Further, addition of the rear door striker reinforcement 106 along with the front end that is combination of front end to the panel seat back striker 104b and the panel quarter
30 inner 104a of the lower quarter panel 104 of the rear pillar 102 provides strength
9

to cater BIW (body in white) torsional loads. Accordingly, the rear door striker reinforcement 106 effectively increases the BIW twist performance by uniformly distribution stress across the rear pillar region.
[0038] Referring to figure 2, the rear door striker reinforcement 106 extends in 5 vehicle width direction WL from the front end 106c to the rear end 106d. The rear door striker reinforcement 106 has a striker mounting location 106g to attach a rear door striker (not shown in figure) that receives latch of the rear door. The rear door striker reinforcement 106, accordingly, reinforces the striker mounting region of the rear door.
10 [0039] In an embodiment of the present subject matter as disclosed in the figure 1 and 2, the rear door striker reinforcement 106 reinforces a rear seat back striker region 106e that is provided on the panel seat back striker 104b to receive rear seat striker 108. The joining of the rear door striker reinforcement 106 to the rear seat striker region 106e increases the strength at seat back striker location.
15 Accordingly, the rear door striker reinforcement 106 increases durability performance of the rear seat striker area thereby enabling light weight structure and design of rear seat striker reinforcement.
[0040] Referring to figure 3, in another embodiment of the present subject matter, the lower quarter panel 104 is divided into two panels; panel quarter inner 104a
20 and panel seat back striker 104b. The panel seat back striker 104 receives the seat back striker 108 with light weighted reinforcement. The panel seat back striker 104b has more thickness, nearly double, than the thickness of the panel quarter inner 104a. By providing more thickness to the panel seat back striker 104b, stiffness of the lower quarter panel is improved at the local area where loads
25 coming from rear seat back are significantly high. Therefore, by increasing the thickness locally, weight of the whole lower quarter panel 104 is decreased which improves fuel economy of the vehicle and decreases cost of the structure. Further, the rear seat back striker 108 is further reinforced by the rear door striker reinforcement 106 at upper end to eliminate requirement of multiple
30 reinforcements for the rear seat back striker 108. By providing the more thicker
10

panel seat back striker 104b, the lower quarter panel 104 or vehicle side body structure achieves below mentioned advantages:
[0041] Weight of whole side body structure is reduced as thickness is increased in a local area. This results in improving the fuel economy of vehicle.
5 [0042] Cost of whole side body structure is reduced as thickness is increased in a local area.
[0043] Strength of seat back striker mounting structure is improved with minimal increase in thickness of panel.
[0044] Panel seat back striker is joined with rear door striker reinforcement 10 thereby improving the strength of rear door striker mounting structure.
[0045] In an embodiment of the present subject matter, the present rear door striker reinforcement in the region of the side panel formed by combination of the rear pillar and the rear wheel house increases the rigidity of the rear pillar to cater all vertical loads and vibrations induced by the suspension system and installed shock
15 absorber. With the help of the rear door striker reinforcement, all vertical loads and vibrations are distributed along the complete surface of the rear pillar and the rear wheel house to improve the twisting performance. Further, the present rear door striker reinforcement increases support and rigidity for the rear door striker mounting location to cater loads applied by the rear door. Furthermore, the rear
20 door striker reinforcement reinforces the rear seat striker region and permits mounting of light weight rear seat striker reinforcement mounting at the region.
[0046] The term “vehicle” as used throughout this detailed description and in the claims refers to any moving vehicle that is capable of carrying one or more human occupants or goods and is powered by any form of energy. The term “vehicle” is a 25 motor vehicle which includes, but is not limited to: cars, trucks, vans, minivans, hatchback, sedan, MUVs, and SUVs.
[0047] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should
11

be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such
5 an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation
10 by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds
15 true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or
20 two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B
25 together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone,
30 B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that
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virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."
[0048] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of "comprising" or "including" also contemplates embodiments that "consist essentially of or "consist of the recited feature.
[0049] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.

We claim:

A vehicle side body structure (100) comprising:
a rear wheel house (105);
a rear pillar (102) connecting roof (101) of the vehicle to the rear wheel house (105), wherein the rear pillar (102) includes an upper quarter panel (103) and a lower quarter panel (104), the upper quarter panel (103) is connected with the roof (101) of the vehicle at one end and with the lower quarter panel (104) at other end, the lower quarter panel (104) is connected with lower end of the upper quarter panel (103) at upper side and upper portion of the rear wheel house (105) at lower side, wherein joining of the upper quarter panel (103) and the lower quarter panel (104) with the rear wheel house (105) constitute a side panel in vehicle width direction (WL) to receive rear door panel of rear door;
characterized in that
a rear door striker reinforcement (106) mounted on the side panel to reinforce the rear pillar (102), the rear door striker reinforcement (106) is mounted on the rear wheel house (105) at lower side and with the lower quarter panel (104) at upper side.
2. The vehicle side body structure (100) as claimed in claim 1, wherein the
lower quarter panel (104) comprises:
a panel quarter inner (104a); and
a panel seat back striker (104b) to receive seat back striker (108), wherein thickness of the panel seat back striker (104b) is more than thickness of the panel quarter inner (104a).
3. The vehicle side body structure (100) as claimed in claim 1, wherein the
rear door striker reinforcement (106) includes at least two legs (106a, 106b) where
one leg (106a) is mounted on upper surface (105a) of the rear wheel house (105)
in the vehicle width direction (WL) and other leg (106b) is mounted on side
flange (105b) of the rear wheel house (105) in vehicle front direction (FL).

4. The vehicle side body structure (100) as claimed in claim 1, wherein front end (106c) of the rear door striker reinforcement (106) elongates in vertical direction (UL) along the lower quarter panel (104).
5. The vehicle side body structure (100) as claimed in claim 1, wherein the rear door striker reinforcement (106) extends in vehicle width direction (WL) from the front end (106c) to rear end (106d), wherein the front end (106c) starts from front end (104ba,) of the lower quarter panel (104).
6. The vehicle side body structure (100) as claimed in claim 1, wherein the rear door striker reinforcement (106) reinforces rear seat striker region (106e) of rear seat back striker (108) along the lower quarter panel (104).
7. The vehicle side body structure (100) as claimed in claim 1, wherein upper end (106f) of the rear door striker reinforcement (106) is mounted with the lower quarter panel (104).
8. The vehicle side body structure (100) as claimed in claim 1, wherein the rear door striker reinforcement (106) defines striker mounting portion (106g) towards rear edge (106d).
9. The vehicle side body structure (100) as claimed in claim 1, wherein the rear door striker reinforcement (106) is spot welded with the lower quarter panel (104) and the rear wheel house (105).
10. The vehicle side body structure (100) as claimed in claim 2, wherein the thickness of the panel seat back striker (104b) is preferably double than the thickness of the panel quarter inner (104a).
11. The vehicle side body structure (100) as claimed in claim 2, wherein the panel quarter inner (104a) is spot welded with the panel seat back striker (104b).

12. The vehicle side body structure (100) as claimed in claim 2, wherein the panel quarter inner (104a) and the panel seat back striker (104b) combinedly define front end (104ba) of the lower quarter panel (104).
13. A vehicle side body structure (100) comprising:
a rear wheel house (105);
a rear pillar (102) connecting roof (101) of the vehicle to the rear wheel house (105), wherein the rear pillar (102) includes an upper quarter panel (103) and a lower quarter panel (104), the upper quarter panel (103) is connected with the roof (101) of the vehicle at one end and with the lower quarter panel (104) at other end, the lower quarter panel (104) is connected with lower end of the upper quarter panel (103) at upper side and upper portion of the rear wheel house (105) at lower side, wherein joining of the upper quarter panel (103) and the lower quarter panel (104) with the rear wheel house (105) constitute a side panel in vehicle width direction (WL) to receive rear door panel of rear door;
characterized in that
wherein the lower quarter panel (104) comprises:
a panel quarter inner (104a); and
a panel seat back striker (104b) to receive seat back striker (108), wherein thickness of the panel seat back striker (104b) is more than thickness of the panel quarter inner (104a).
14. The vehicle side body structure (100) as claimed in claim 13, wherein the thickness of the panel seat back striker (104b) is preferably double than the thickness of the panel quarter inner (104a).
15. The vehicle side body structure (100) as claimed in claim 13, wherein the panel quarter inner (104a) is spot welded with the panel seat back striker (104b).
16. The vehicle side body structure (100) as claimed in claim 13, further comprising a rear door striker reinforcement (106) mounted on the side panel to

reinforce the rear pillar (102), wherein the rear door striker reinforcement (106) is mounted on the rear wheel house (105) at lower side and with the panel seat back striker (104b) at upper side.
17. The vehicle side body structure (100) as claimed in claim 16, wherein the rear door striker reinforcement (106) includes at least two legs (106a, 106b) where one leg (106a) is mounted on upper surface (105a) of the rear wheel house (105) in the vehicle width direction (WL) and other leg (106b) is mounted on side flange (105b) of the rear wheel house (105) in vehicle front direction (FL).
18. The vehicle side body structure (100) as claimed in claim 16, wherein upper end (1061) of the rear door striker reinforcement (106) is mounted with the panel quarter inner (104a).
19. A rear door striker reinforcement (106) to be mounted in vehicle side body structure (100) to damp vertical loads induced by suspension system of the vehicle, the rear door striker reinforcement (106) comprising:
at least two legs (106a, 106b) where one leg (106a) from the at least two legs (106a, 106b) is mounted on upper surface (105a) of rear wheel house (105) and other leg (106b) is mounted on side flange (105b) of the rear wheel house (105);
the upper end (1061) mounted with panel quarter inner (104a) of lower quarter panel (104); and
a front end (106c) elongates along with a front end (104ba) of a panel seat back striker (104b) of the lower quarter panel (104), wherein the front end (106c) is mounted along with the front end (104ba) of the lower quarter panel (104) and side flange (105b) of the rear wheel house (105).
20. The rear door striker reinforcement (106) as claimed in claim 19, wherein the rear door striker reinforcement (106) reinforces the rear seat striker region (106e) of rear seat back striker (108).
21. The rear door striker reinforcement (106) as claimed in claim 19, wherein the rear door striker reinforcement (106) is spot welded with the rear wheel house (105) and the lower quarter panel (104).

22. The rear door striker reinforcement (106) as claimed in claim 19, wherein the rear door striker reinforcement (106) is an elongated member in between upper end (106f) and at least two legs (106a, 106b) in vehicle height direction (UL).