JP2017170967A - Impact absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress load fluctuation when deforming and to suppress increase in a load during a latter period of deformation in an impact absorber.SOLUTION: An impact absorber 10, which is located between a vehicle body panel and a trim covering an inside surface of the vehicle body panel, has: at least three or more cylindrical vertical wall parts 11 which are so located along a prescribed axis A, which extends from the vehicle body panel toward the trim, as to be mutually deviated in an axial direction; and plural lateral wall parts 12 which connect marginal parts of adjacent vertical wall parts to each other. Three or more vertical wall parts which have a narrower width as one disposed on one side of the axis, and respective lateral parts are so formed as to have a substantially flat surface, and are substantially orthogonal to the axis. At a proper place on the lateral wall part located on the other side of the axis, an adjustment hole 20 which penetrates in a thickness direction and adjusts a rigidity of the lateral wall part is formed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a shock absorber disposed between a vehicle body panel and a trim.

  2. Description of the Related Art An automobile door is known in which an impact absorber is disposed between a door panel and a door trim that covers a side of a passenger compartment of the door panel in order to reduce an impact applied to a passenger from the door panel at the time of a side collision. In such an impact absorber, a resin square tube extending from the door trim toward the door panel is gradually reduced in width toward the door panel and formed in a step shape (for example, Patent Documents 1 and 2). ). In such an impact absorber, each stage is deformed stepwise according to the displacement (deformation amount), and thus a rapid increase in load (reaction force) is suppressed. Moreover, the deformation stroke of the shock absorber can be lengthened.

Japanese Patent No. 3644582 JP 7-315076 A

  Such a stepped shock absorber is more easily deformed because the step on the tip side is narrower than the step on the base end side. Therefore, the step on the distal end side is deformed in the early stage of deformation, and the step on the proximal end side is deformed in the later stage of deformation. Thereby, the peak of the load resulting from the deformation of each stage occurs, and the load varies according to the deformation amount of the shock absorber. In addition, since the load required for the deformation is large at the base end side, there is a problem that the load (reaction force) becomes large in the later stage of the deformation, and the load is easily transmitted to the occupant.

  In view of the above background, it is an object of the present invention to suppress a change in load at the time of deformation and to suppress an increase in load at a later stage of deformation in the shock absorber.

  In order to solve the above problems, one aspect of the present invention is an impact absorber (10) disposed between a vehicle body panel (2) and a trim (3) that covers an inner surface of the vehicle body panel, Adjacent to at least three cylindrical vertical wall portions (11) arranged along a predetermined axis (A) extending from the vehicle body panel toward the trim and shifted from each other in the direction of the axis. A plurality of horizontal wall portions (12) connecting edges of the vertical wall portions, and the three or more vertical wall portions are narrower as they are arranged on one side of the axis, Each is formed in a substantially plane, is substantially perpendicular to the axis, and penetrates in the thickness direction at an appropriate position of the horizontal wall disposed on the other side of the axis, and an adjustment hole for adjusting the rigidity of the horizontal wall ( 20) is formed.

  According to this aspect, the area of the lateral wall portion arranged on the other side of the axis is reduced by the adjustment hole, and the rigidity is lowered. Thereby, the rigidity of each horizontal wall part approaches each other, and the deformation start time of each horizontal wall part when the shock absorber receives a load approaches. Thereby, the peak of the load (reaction force) resulting from the deformation of each lateral wall portion is blunted, and fluctuations in the reaction force generated by the shock absorber are suppressed.

  In the above aspect, when viewed from the direction along the axis, the areas of the portions of the horizontal wall portion excluding the adjustment hole are preferably set to be equal to each other. Or in said aspect, when it sees from the direction along the said axis, the length of the circumferential direction centering on each said axis of each part except the said adjustment hole of the said horizontal wall part is set mutually equal. Good.

  According to these aspects, the rigidity of each lateral wall part becomes substantially equal, and when the shock absorber receives a load, each lateral wall part starts to deform almost simultaneously.

  In the above aspect, the widths of the horizontal wall portions may be set to be equal to each other in a direction orthogonal to the axis.

  According to this aspect, the amount of deformation of each stage of the shock absorber is substantially uniform.

  Moreover, said aspect WHEREIN: Each of the said vertical wall part is good in the length along an axial direction being equal.

  According to this aspect, the load difference applied to each vertical wall can be reduced.

  Further, in the above aspect, each of the vertical wall portions perpendicular to the axis is formed in a quadrilateral shape, and each of the horizontal wall portions is formed in a quadrangular frame shape when viewed from the direction along the axis. The adjustment hole may be formed in a central portion of each side (18) of the frame shape of the lateral wall portion.

  According to this aspect, when the area of the lateral wall portion on one side of the axis and the lateral wall portion on the other side of the axis are substantially equal, the rigidity of each lateral wall portion is substantially equal, and the load when each lateral wall portion is deformed is It becomes almost equal.

  Further, in the above aspect, the vertical wall portion has a first vertical wall portion (11A), a second vertical wall portion (11B), and a third vertical wall portion (11C) in this order from one side of the axis. The horizontal wall portion includes a first horizontal wall portion (12A) provided between the first vertical wall portion and the second vertical wall portion, and the second vertical wall portion and the third vertical wall portion. It has a 2nd horizontal wall part (12B) provided in between, and the said adjustment hole is good to be formed in the said 2nd horizontal wall part.

  According to this aspect, since the area of the second horizontal wall portion is reduced by the adjustment hole and the rigidity of the second horizontal wall portion approaches the rigidity of the first horizontal wall portion, the deformation start timing of the second horizontal wall portion and the first horizontal wall portion is reduced. Approach each other.

  In the above aspect, the adjustment hole has a rectangular cross section, one of the long sides is along the edge of the second vertical wall, and the other of the long sides is the edge of the third vertical wall. It is good to follow.

  According to this aspect, since the adjustment hole is arranged so as to divide the second lateral wall portion, the rigidity of the second lateral wall portion can be appropriately reduced.

  Moreover, said aspect WHEREIN: It is good for the opening of the one side of the said vertical wall part arrange | positioned at the one side most in the direction of the said axis | shaft to be obstruct | occluded by the plate-shaped cover part (13).

  According to this aspect, the shock absorber can reliably contact the vehicle body panel or the trim at the lid portion.

  Further, in the above aspect, the vertical wall portion arranged on the most other side in the direction of the axis is provided with a coupling portion (22) coupled to one of the vehicle body panel and the trim. Good.

  According to this aspect, the shock absorbing member can be held at an appropriate position.

  Further, in the above aspect, each of the vertical wall portions perpendicular to the axis is formed in a quadrilateral shape, and each of the horizontal wall portions is formed in a quadrangular frame shape when viewed from the direction along the axis. The adjustment hole may be formed in a frame-shaped corner of the lateral wall.

  According to this aspect, the rigidity reduction effect of the lateral wall portion per unit area of the adjustment hole is increased. Thereby, when reducing the rigidity of the lateral wall portion by a predetermined value, the area of the adjustment hole can be reduced.

  According to the above configuration, in the shock absorber, it is possible to suppress fluctuations in the load at the time of deformation and to suppress an increase in the load at the later stage of deformation.

A side view showing a front door to which a shock absorber according to a first embodiment is applied. II-II sectional view of FIG. The perspective view of the shock absorber which concerns on 1st Embodiment The top view of the shock absorber which concerns on 1st Embodiment Explanatory drawing which shows the deformation | transformation aspect of the shock absorber which concerns on 1st Embodiment. The graph which shows the load characteristic of the shock absorber which concerns on 1st Embodiment The perspective view of the shock absorber which concerns on 2nd Embodiment

  Hereinafter, an embodiment in which a shock absorber according to the present invention is applied to a right front seat door of an automobile will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the door 1 of the right front seat of the automobile has a door panel 2 and a door trim 3 (garnish) provided so as to cover the inside surface of the door panel 2. The door panel 2 has an inner panel 2A and an outer panel 2B formed from a steel plate. The inner panel 2A is disposed on the inner side (vehicle compartment side) of the outer panel 2B that forms the outer surface of the vehicle body. The inner panel 2A and the outer panel 2B are coupled to the outer panel 2B at the front edge, the lower edge, and the rear edge except for the upper edge, and form a space 2C at the center. In the space 2C between the inner panel 2A and the outer panel 2B, the window glass and its lifting device are arranged. The window glass moves up and down through an opening formed between the upper edges of the inner panel 2A and the outer panel 2B.

  The door trim 3 is formed from a resin material. The door trim 3 has a main body portion 3A disposed on the inner side of the inner panel 2A with the main surface facing left and right, and an edge portion 3B that protrudes from the periphery of the main body portion 3A toward the inner panel 2A and contacts the inner panel 2A. Have. The main body portion 3A includes an armrest portion 3C that protrudes toward the vehicle interior at the center in the vertical direction, a rear lower side wall portion 3D that is disposed below the rear portion of the armrest portion 3C, and a rear lower side wall portion 3D that is below the armrest portion 3C. And a pocket portion 3E disposed in front of each other.

  The rear lower side wall portion 3D is disposed below the rear portion of the main body portion 3A. The rear lower side wall portion 3D is formed in a flat plate shape, and is disposed away from the inner panel 2A so as to face the inner side surface of the inner panel 2A through the space 6. The rear lower side wall 3D and the inner panel 2A are arranged in parallel to each other with their surfaces facing left and right. A shock absorber 10 is disposed in the space 6. The shock absorber 10 may be supported by either the door trim 3 or the inner panel 2A, but in the present embodiment, the shock absorber 10 is on the vehicle outer side surface (the surface facing the inner panel 2A side) of the rear lower side wall portion 3D. It is supported.

  The shock absorber 10 is made of a resin material such as polypropylene and is formed by a known molding method such as injection molding. As shown in FIGS. 3 and 4, the shock absorber 10 has a predetermined axis A, and has at least three or more cylindrical longitudinally arranged along the axis A and shifted from each other in the direction of the axis A. The wall 11 and a plurality of horizontal walls 12 that connect the edges of the adjacent vertical walls 11 are arranged, and the vertical wall 11 is arranged on the tip side that is one side of the axis A. The width is narrower than that disposed on the base end side which is the other side. That is, it can be said that the shock absorber 10 is a stepped (pyramidal) cylindrical member whose width gradually decreases toward the tip side.

  In the present embodiment, the shock absorber 10 has three vertical wall portions 11 of a first vertical wall portion 11A, a second vertical wall portion 11B, and a third vertical wall portion 11C in this order from the distal end side. Two horizontal wall portions 12 of a first horizontal wall portion 12A between the wall portion 11A and the second vertical wall portion 11B, and a second horizontal wall portion 12B between the second vertical wall portion 11B and the third vertical wall portion 11C, Have The end portion on the distal end side of the first vertical wall portion 11 </ b> A is closed by a plate-like lid portion 13. The shock absorber 10 includes a first stage 15 constituted by the first vertical wall part 11A and the lid part 13, a second stage 16 constituted by the second vertical wall part 11B and the first horizontal wall part 12A, and a third stage. A third step 17 constituted by the vertical wall portion 11C and the second horizontal wall portion 12B.

  Each of the outer shapes of the cross sections (cross sections orthogonal to the axis A) of the first to third vertical wall portions 11A to 11C is formed in a similar shape. In this embodiment, the external shape of the cross section of the 1st-3rd vertical wall part 11A-11C is formed in the square. The 1st-3rd vertical wall part 11A-11C is arrange | positioned coaxially, and is arrange | positioned so that each corner | corner may mutually correspond. The heights (lengths in the direction along the axis A) of the first to third vertical wall portions 11A to 11C are set to be equal to each other.

  The thicknesses of the first to third vertical wall portions 11A to 11C are set to be equal to each other. Each of the first to third vertical wall portions 11A to 11C is slightly inclined in a direction in which the distal end side approaches the axis A with respect to the proximal end side. The inclination angles of the first to third vertical wall portions 11A to 11C with respect to the axis A are set to be equal to each other. In another embodiment, the inclination angle of the first to third vertical wall portions 11A to 11C with respect to the axis A may be 0 ° (the first to third vertical wall portions 11A to 11C and the axis A are parallel). .

  12 A of 1st horizontal wall parts are formed in the square frame shape centering on the axis line A so that the base end side edge of 11 A of 1st vertical wall parts and the front end side edge of 2nd vertical wall part 11B may be connected. Yes. Similarly, the second horizontal wall portion 12B has a rectangular frame shape centering on the axis A so as to connect the proximal end side edge of the second vertical wall portion 11B and the distal end side edge of the third vertical wall portion 11C. Is formed. The thickness of the first horizontal wall portion 12A and the second horizontal wall portion 12B is set equal to the thickness of the first to third vertical wall portions 11A to 11C. The surfaces of the first lateral wall portion 12A and the second lateral wall portion 12B facing the distal end side are formed in a plane. In other embodiments, the surfaces of the first lateral wall portion 12A and the second lateral wall portion 12B facing the distal end side may be inclined such that the inner edge side protrudes toward the distal end side with respect to the outer edge side.

  As shown in FIG. 4, the width W1 of the first horizontal wall portion 12A (the distance between the outer surface of the base end side edge of the first vertical wall portion 11A and the inner surface of the front end side edge of the second vertical wall portion 11B) is a corner portion. Except for, it is formed in a certain length. Similarly, the width W2 of the second horizontal wall portion 12B (the distance between the outer surface of the proximal end side edge of the second vertical wall portion 11B and the inner surface of the distal end side edge of the third vertical wall portion 11C) is constant except for the corner portion. It is formed in the length. In the present embodiment, the width W1 of the first horizontal wall portion 12A and the width W2 of the second horizontal wall portion 12B are set to be equal to each other.

  As shown in FIGS. 3 and 4, each of the central portions in the longitudinal direction of the four straight side portions 18 forming the quadrangular frame shape of the second lateral wall portion 12B has a thickness direction (parallel to the axis A). An adjustment hole 20 penetrating in the direction) is formed. The adjustment hole 20 is formed for the purpose of reducing the area of the second lateral wall portion 12B viewed from the tip side and reducing the rigidity of the second lateral wall portion 12B. Each adjustment hole 20 is formed in a rectangular shape that extends along the longitudinal direction of each side portion 18. The hole edge corresponding to one of the long sides of the rectangle in the adjustment hole 20 extends along the base end side edge of the outer surface of the second vertical wall portion 11B, and the hole edge corresponding to the other long side is the third vertical wall portion 11C. It extends along the front end side edge of the inner surface. The four adjustment holes 20 are formed in the same shape.

  As shown in FIG. 4, when viewed from the front end side, the area S2 of the second lateral wall portion 12B excluding all the adjustment holes 20 and the area S1 of the first lateral wall portion 12A are all equal to each other. The size of the adjustment hole 20 is set. When viewed from the front end side, the area S1 of the first horizontal wall portion 12A refers to the area of the portion that does not overlap the first vertical wall portion 11A and the second vertical wall portion 11B, and the area S2 of the second horizontal wall portion 12B is the second. The area of the part which does not overlap with the vertical wall part 11B and the 3rd vertical wall part 11C is said.

  Further, when viewed from the front end side, the circumferential length (circumferential length) L2 around the axis A of the second horizontal wall portion 12B excluding all the adjustment holes 20 and the axis A of the first horizontal wall portion 12A are The size of all the adjustment holes 20 is set so that the circumferential length (circumferential length) L1 as the center is equal to each other. When viewed from the front end side, the circumferential length L1 of the first lateral wall portion 12A is a length that passes through the center of the width W1 of the first lateral wall portion 12A, and the circumferential length L2 of the second lateral wall portion 12B is the first lateral wall. It is the length that passes through the center of the width W2 of the portion 12A, and is the total length of each portion divided by the adjustment hole 20.

  A coupling portion 22 that protrudes outward from the third vertical wall portion 11C in a direction orthogonal to the axis A is provided at the proximal end side edge of the third vertical wall portion 11C. The coupling portion 22 is formed in a planar plate shape orthogonal to the axis A. In the present embodiment, the coupling portion 22 is formed in an annular shape along the base end side edge of the third vertical wall portion 11C.

  The shock absorber 10 is coupled to the vehicle outer surface of the rear lower side wall portion 3D at the coupling portion 22. The coupling between the coupling part 22 and the rear lower side wall part 3D may be performed by bonding with an adhesive, a double-sided tape, etc., fastening with screws, locking with locking claws, or the like. In a state where the shock absorber 10 is coupled to the rear lower wall 3D, the axis A extends so as to be orthogonal to the vehicle outer surface of the rear lower wall 3D and the vehicle inner surface of the inner panel 2A. In the present embodiment, the shock absorber 10 is in contact with the inner side surface of the inner panel 2 </ b> A at the lid portion 13. In other embodiments, the lid portion 13 may be disposed so as to face the inner side surface of the inner panel 2A via a gap.

  With reference to FIG. 5, the deformation | transformation aspect of the shock absorber 10 when a load is added from the axis line A direction is demonstrated. When the door 1 moves to the inside of the vehicle due to a side collision of the vehicle and the shock absorber 10 is compressed between the door 1 and the occupant from the direction of the axis A, as shown in FIG. The horizontal wall portion 12A and the second horizontal wall portion 12B are deformed, and the first vertical wall portion 11A and the second vertical wall portion 11B move to the proximal end side. At this time, since the rigidity of the second lateral wall portion 12B and the first lateral wall portion 12A is substantially equal by the adjustment hole 20, the first lateral wall portion 12A and the second lateral wall portion 12B start to be deformed substantially simultaneously. At this time, the load is absorbed by the first lateral wall portion 12A and the second lateral wall portion 12B being deformed. As shown in FIG. 5C, the deformation of the first horizontal wall portion 12A and the second horizontal wall portion 12B is such that the first vertical wall portion 11A, the second vertical wall portion 11B, and the third vertical wall portion 11C substantially overlap. End at the moment. Thereafter, the first vertical wall portion 11A, the second vertical wall portion 11B, and the third vertical wall portion 11C are further deformed by compression to further absorb the load.

  In the shock absorber 10 according to the present embodiment, the first lateral wall portion 12A and the second lateral wall portion 12B are deformed substantially simultaneously. Therefore, the load (reaction force) characteristic with respect to the displacement is shown by the curve 100 (solid line in FIG. 6). )become that way. For comparison, a load characteristic with respect to a displacement amount of a comparative example in which only the adjustment hole 20 is omitted from the shock absorber 10 according to the present embodiment is shown as a curve 101 (broken line) in FIG. In the curve 101, two peaks are confirmed, and it is confirmed that the load (reaction force) fluctuates with respect to the displacement. This is because the rigidity of the second lateral wall portion 12B is higher than the rigidity of the first lateral wall portion 12A because there is no adjustment hole 20 in the comparative example. Therefore, in the shock absorbing structure according to the comparative example, when receiving a collision load, the first horizontal wall portion 12A is first deformed and the first vertical wall portion 11A moves to the proximal end side, and the second horizontal wall portion is delayed. 12B deform | transforms and the 2nd vertical wall part 11B moves to a base end side. Further, since the rigidity of the second lateral wall portion 12B is higher than that of the first lateral wall portion 12A, a relatively large load (reaction force) is generated when the second lateral wall portion 12B is deformed.

  In the shock absorber 10 according to the present embodiment, the rigidity of the first lateral wall portion 12A and the second lateral wall portion 12B is substantially equal by the adjustment hole 20, and deforms substantially simultaneously when a load is applied, so there are a plurality of peaks. Formation is suppressed and reaction force is stabilized. Further, a large reaction force is not generated when the second lateral wall portion 12B is deformed.

  The shock absorber 10 is formed in a rotationally symmetric shape with the axis A as the center, with the adjusting hole 20 disposed at the center of each side portion. Therefore, when a load is received from the direction along the axis A, it can be stably deformed in the direction of the axis A.

(Second Embodiment)
The shock absorber 30 according to the second embodiment will be described with reference to FIG. The shock absorber 30 has the same configuration as the shock absorber 10 according to the first embodiment except for the shape and position of the adjustment hole 20. In the shock absorber 30, the same components as those of the shock absorber 10 are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 7, in the shock absorber 30, the adjustment hole 20 is disposed at each corner of the quadrangular frame shape of the second lateral wall portion 12 </ b> B. When the second lateral wall portion 12B is deformed to the proximal end side under a load, tension is generated at the corner portion. Therefore, by providing the adjustment hole 20 in the corner, the rigidity can be greatly reduced as compared with the case where the adjustment hole 20 is provided in another part.

  Various shapes, such as a square and a rectangle, can be adopted as the shape of each adjustment hole 20, but in this embodiment, it is formed in an L shape. Each adjustment hole 20 formed in the L shape is arranged along the base end side edge of the corner portion 32 of the second vertical wall portion 11B. Thereby, the base end side edge of the corner | angular part 31 of the 2nd vertical wall part 11B is not couple | bonded with the 2nd horizontal wall part 12B, but becomes a free end.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, various materials can be applied to the material of the shock absorber 10. The shock absorber 10 may be made of metal, for example. In this case, the shock absorber 10 may be formed by drawing or combining a plurality of members by welding or the like.

The number of steps of the shock absorber 10 (the number of the vertical wall portions 11) may be arbitrarily changed within a range of 3 or more. In this case, the adjustment hole 20 may be provided in the lateral wall portion 12 of the second and subsequent steps (base end side step).
Moreover, the external shape of the cross section of each vertical wall part 11 is not limited to a square, It can be made into various shapes, such as a rectangle, a polygon, a circle, an ellipse, and a star shape. Moreover, the thickness of each vertical wall part 11 and each horizontal wall part 12 can be set arbitrarily. The wall thickness of each vertical wall part 11 and each horizontal wall part 12 may be set equal to each other, or may be set to a value different from each other.

  The shock absorber 10 includes a side panel that constitutes a side part of the passenger compartment and the luggage room, a trim provided on the passenger compartment side of the side panel, in addition to between the door panel 2 (inner panel 2A) and the door trim 3. It can arrange | position in various spaces, such as between.

1: Door 2: Door panel 2A: Inner panel 2B: Outer panel 3: Door trim 3D: Rear lower wall part 10, 30: Shock absorber 11: Vertical wall part 11A: First vertical wall part 11B: Second vertical wall part 11C: 3rd vertical wall part 12: Horizontal wall part 12A: 1st horizontal wall part 12B: 2nd horizontal wall part 13: Cover part 18: Side part 31: Corner part A: Axis line

Claims (11)

A shock absorber disposed between a vehicle body panel and a trim covering an inner surface of the vehicle body panel;
At least three or more cylindrical vertical wall portions arranged along a predetermined axis extending from the vehicle body panel toward the trim and shifted from each other in the direction of the axis;
A plurality of horizontal wall portions connecting the edges of the adjacent vertical wall portions,
The three or more vertical wall portions are narrower as those arranged on one side of the axis,
Each of the lateral wall portions is formed in a substantially plane, is substantially orthogonal to the axis,
The shock absorber according to claim 1, wherein an adjustment hole that penetrates in the thickness direction and adjusts the rigidity of the horizontal wall portion is formed at an appropriate position of the horizontal wall portion arranged on the other side of the axis.   2. The shock absorber according to claim 1, wherein when viewed from a direction along the axis, the areas of portions of the horizontal wall portion excluding the adjustment hole are set to be equal to each other.   The lengths in the circumferential direction centering on the axis of each of the portions excluding the adjustment hole of the horizontal wall when viewed from the direction along the axis are set to be equal to each other. 2. The shock absorber according to 1.   4. The shock absorber according to claim 2, wherein the width of each of the lateral wall portions is set to be equal to each other in a direction orthogonal to the axis. 5.   The shock absorber according to claim 4, wherein each of the vertical wall portions has an equal length along the axial direction. A cross section perpendicular to each axis of the vertical wall portion is formed in a quadrangle,
Each of the lateral wall portions is formed in a rectangular frame shape when viewed from the direction along the axis,
The shock absorber according to claim 5, wherein the adjustment hole is formed in a central portion of each side of the frame shape of the lateral wall portion. The vertical wall portion has a first vertical wall portion, a second vertical wall portion, and a third vertical wall portion in order from one side of the axis,
The horizontal wall portion is provided between a first horizontal wall portion provided between the first vertical wall portion and the second vertical wall portion, and between the second vertical wall portion and the third vertical wall portion. A second lateral wall portion,
The shock absorber according to claim 6, wherein the adjustment hole is formed in the second lateral wall portion.   The adjustment hole has a rectangular cross section, one of the long sides is along the edge of the second vertical wall, and the other of the long sides is along the edge of the third vertical wall. The shock absorber according to claim 7.   The opening on one side of the vertical wall portion arranged on the most side in the direction of the axis is closed by a plate-like lid portion. The shock absorber according to item.   The coupling portion coupled to one of the vehicle body panel and the trim is provided on the vertical wall portion arranged on the most other side in the direction of the axis. 10. The shock absorber according to any one of items 9. A cross section perpendicular to each axis of the vertical wall portion is formed in a quadrangle,
Each of the lateral wall portions is formed in a rectangular frame shape when viewed from the direction along the axis,
The shock absorber according to claim 10, wherein the adjustment hole is formed in a corner portion of the frame shape of the lateral wall portion.

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