Elastic support member and suspension device

Abstract

The invention provides an elastic support member and a suspension device. The purpose of the present invention is to provide a technique capable of reducing an insertion load without reducing a pull-out load. An elastic support member (1) is interposed between a coil spring and a spring support member (130) that supports an end portion of the coil spring, the elastic support member having a protruding portion (20) that protrudes from an opposing surface (12) that opposes the spring support member, the protruding portion being inserted into a through-hole (134) formed in the spring support member, the protruding portion being provided with: a base portion (30) that is formed in the spring support member; a base part which has a smaller size in a direction parallel to the facing surface than the through-hole, and which is fitted into the through-hole; and a convex portion (40) that protrudes outward from the outer peripheral portion of the base portion, is located on the opposite side of the facing surface with respect to the spring support member in a state where the base portion is fitted into the through-hole, and has a recessed portion (42) between the convex portion and the base portion, the recessed portion (42) being recessed toward the side away from the facing surface.

Description

Technical Field

[0001] The present invention relates to an elastic supporting member and a suspension device. Background Art

[0002] For example, the elastic support component described in Patent Document 1 includes a rubber main body, which includes a spring support surface for supporting the end seat ring of the coil spring. Two engaging protrusions that engage with the through-hole formed in the spring seat are integrally formed on the lower surface of the rubber main body on the opposite side of the spring support surface. The engaging protrusion includes: a columnar portion, which is provided on the rubber main body side; and an engaging portion, which is provided on the side away from the rubber main body and engages with the through-hole of the spring seat. The columnar portion has a diameter that is the same as or slightly smaller than the diameter of the through-hole of the spring seat and a height that is slightly larger than the thickness of the spring seat. The engaging portion is in a conical or truncated cone shape whose diameter decreases downward, and has a diameter that is larger than the diameter of the through-hole of the spring seat on the base end side and smaller than the diameter of the through-hole on the terminal side. The engaging protrusion engages with the through-hole of the spring seat by engaging the annular shoulder surface formed on the upper end of the engaging portion with the lower surface of the spring seat.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-46910 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the elastic support member described in Patent Document 1, the insertion load of the fitting portion of the fitting projection into the through hole of the spring seat and the extraction load of the fitting portion from the through hole of the spring seat are determined by the force for deforming the fitting portion to a size below the through hole of the spring seat. Therefore, if the insertion load is not reduced, the extraction load will also be reduced when the insertion load is reduced in order to facilitate the assembly of the elastic support member to the spring seat.

[0008] An object of the present invention is to provide an elastic supporting member or the like capable of reducing an insertion load without reducing a withdrawal load.

[0009] Means for solving problems

[0010] The present invention completed based on this purpose is an elastic supporting component, which is interposed between a spring and a spring supporting component that supports an end portion of the spring, wherein the elastic supporting component has a protrusion protruding from an opposing surface opposite to the spring supporting component, and the protrusion is inserted into a through hole formed in the spring supporting component, and the protrusion has: a base portion, whose size in a direction parallel to the opposing surface is smaller than that of the through hole, and the base portion is embedded in the through hole; and a convex portion, which protrudes outward from the outer peripheral portion of the base portion, and when the base portion is embedded in the through hole, the convex portion is located on the side opposite to the opposing surface relative to the spring supporting component, and the convex portion has a concave portion between the base portion and the base portion, which is concave toward the side away from the opposing surface.

[0011] Effects of the Invention

[0012] According to the present invention, the insertion load can be reduced without reducing the extraction load. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram showing an example of a schematic structure of a suspension device.

[0014] Figure 2 It is a perspective view showing an example of a state in which a coil spring, a spring support member, and an elastic support member are assembled.

[0015] Figure 3 It is a perspective view showing an example of a state before the spring support member and the elastic support member are assembled.

[0016] Figure 4 This is a diagram showing an example of the appearance of the protrusion 20 as viewed in the radial direction.

[0017] Figure 5 It means along Figure 4 FIG. 1 is a diagram showing an example of the appearance of the protrusion 20 as viewed in the V direction.

[0018] Figure 6 Yes means Figure 4 A diagram showing an example of a cross section of the VI-VI portion.

[0019] Figure 7 Yes means Figure 4 A diagram showing an example of a cross section of part VII-VII.

[0020] Figure 8 Yes means Figure 4 A diagram showing an example of a cross section of the VIII-VIII portion.

[0021] Fig. 9 Yes means Figure 4 A diagram showing an example of a cross section of the IX-IX portion.

[0022] Fig.10 yes Fig. 9 Magnified view of the X section.

[0023] Fig.11 This is a diagram showing an example of a state in which a protrusion is inserted into a through hole of a spring support member.

[0024] Fig.12 This is a diagram showing an example of a state before the protrusion is pulled out from the through hole of the spring support member.

[0025] Description of symbols

[0026] 1: elastic supporting member; 10: seating portion; 11: supporting surface; 12: opposing surface; 20: protrusion; 30: base; 30c: semicircle; 30s: quadrilateral; 31: base end; 32: terminal end; 33: middle portion; 40: convex portion; 41: outer edge; 42: concave portion; 120: coil spring; 121: wire; 130: spring supporting member. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] Figure 1 It is a diagram showing an example of a schematic structure of the suspension device 100 .

[0029] The suspension device 100 is a column suspension, such as Figure 1 As shown in FIG. 1 , the suspension device 100 includes a hydraulic shock absorber 110 and a coil spring 120 (an example of a spring) disposed outside the hydraulic shock absorber 110. In addition, the suspension device 100 includes a side ( Figure 1 The spring support member 130 at the end of the coil spring 120 (the lower side in the figure) and the other side ( Figure 1 The spring support member 140 is disposed at the end of the coil spring 120 (the upper side in the figure). In addition, the suspension device 100 includes an elastic support member 130 interposed between the coil spring 120 and the spring support member 130.

[0030] The suspension device 100 includes a vehicle body side bracket 150, which is mounted on the end of the piston rod 112 described later on the other side in the axial direction, and is used to mount the suspension device 100 to the vehicle; and a wheel side bracket 160, which is fixed to the end of the piston rod 112 on one side in the axial direction in the shock absorber housing 111 described later, and is used to mount the suspension device 100 to the wheel. In addition, the suspension device 100 includes a dust cover 170 that covers at least a portion of the piston rod 112.

[0031] The hydraulic shock absorber 110 includes a shock absorber housing 111 for storing oil, a cylinder (not shown) coaxially arranged in the shock absorber housing 111, a piston (not shown) sliding in the cylinder, and a piston rod 112 having one end portion holding the piston and the other end portion protruding from the shock absorber housing 111. The piston rod 112 is a columnar or cylindrical member.

[0032] The coil spring 120 is formed by winding a wire 121 into a spiral shape. The elastic support member 1 is installed in an arc shape of about 3 / 5 of the end of one side of the coil spring 120. Hereinafter, the winding direction of the wire 121 of the portion of the coil spring 120 to which the elastic support member 1 is installed is sometimes referred to as the "winding direction". In addition, the radial direction of the wire 121 wound into a spiral shape is sometimes referred to as the "radial direction".

[0033] Figure 2 It is a perspective view showing an example of a state in which the coil spring 120 , the spring support member 130 , and the elastic support member 1 are assembled.

[0034] Figure 3 It is a perspective view showing an example of a state before the spring support member 130 and the elastic support member 1 are assembled.

[0035] The spring support member 130 is fixed to the buffer housing 111 (see Figure 1 ) and supports the end of the coil spring 120. The spring support member 130 may be formed by press-working a thin metal plate such as a steel plate.

[0036] The spring support member 130 is formed with a groove 131 in which the elastic support member 1 is disposed. The groove 131 has a mounting surface 132 on which the elastic support member 1 is mounted. Hereinafter, the surface opposite to the mounting surface 132 is referred to as a back surface 133 (see Fig.11 ). In addition, a through hole 134 is formed in the spring support member 130 so as to communicate the placement surface 132 with the back surface 133. Two through holes 134 are formed in the winding direction.

[0037] The elastic support member 1 is a rubber member interposed between the coil spring 120 and the spring support member 130 , and mitigates the impact between the coil spring 120 and the spring support member 130 to suppress the generation of noise.

[0038] The elastic supporting member 1 includes a seating portion 10 on which the coil spring 120 is seated, and a fall-off preventing portion 50 for preventing the elastic supporting member 1 from falling off from the coil spring 120 .

[0039] (Seating portion 10)

[0040] The seat portion 10 has a support surface 11 located on the coil spring 120 side and supporting the coil spring 120, and an opposing surface 12 located on the spring support member 130 side and opposing the mounting surface 132 of the spring support member 130. The seat portion 10 also has an inner side surface 13 as a radially inner side surface and an outer side surface 14 as a radially outer side surface.

[0041] The seat portion 10 has two protrusions 20 that protrude from the facing surface 12 toward the spring support member 130 in the winding direction. The protrusions 20 will be described in detail later.

[0042] The elastic support member 1 is positioned relative to the spring support member 130 by inserting the protrusion 20 of the seat portion 10 into the through hole 134 formed in the spring support member 130 , thereby preventing the elastic support member 1 from falling off from the spring support member 130 .

[0043] (Fall-off prevention portion 50)

[0044] The fall-off prevention portion 50 is a portion that prevents the elastic supporting component 1 from falling off from the coil spring 120 after the elastic supporting component 1 is installed on the coil spring 120. The fall-off prevention portion 50 includes: a first prevention portion 60 arranged at the central portion of the winding direction of the elastic supporting component 1; and a second prevention portion 70 arranged at the end portion of the winding direction of the elastic supporting component 1.

[0045] like Figure 3 As shown, the first preventing portion 60 has a first inner preventing sheet 61 that protrudes radially inward and upward from the inner side surface 13 and extends radially outward in a manner that surrounds the wire 121. In addition, the first preventing portion 60 has a first outer preventing sheet 62 that protrudes radially outward and upward from the outer side surface 14 and extends radially inward in a manner that surrounds the wire 121.

[0046] like Figure 3 As shown, the second prevention portion 70 has a second inner prevention sheet 71 that protrudes radially inward and upward from the inner side surface 13 and extends radially outward in a manner that surrounds the wire 121. In addition, the second prevention portion 70 has a second outer prevention sheet 72 that protrudes radially outward and upward from the outer side surface 14 and extends radially inward in a manner that surrounds the wire 121.

[0047] (Protrusion 20)

[0048] Figure 4 This is a diagram showing an example of the appearance of the protrusion 20 as viewed in the radial direction.

[0049] Figure 5 It means along Figure 4FIG. 1 is a diagram showing an example of the appearance of the protrusion 20 as viewed in the V direction.

[0050] Figure 6 Yes means Figure 4 A diagram showing an example of a cross section of the VI-VI portion.

[0051] Figure 7 Yes means Figure 4 A diagram showing an example of a cross section of part VII-VII.

[0052] Figure 8 Yes means Figure 4 A diagram showing an example of a cross section of the VIII-VIII portion.

[0053] Fig. 9 Yes means Figure 4 A diagram showing an example of a cross section of the IX-IX portion.

[0054] Fig.10 yes Fig. 9 Magnified view of the X section.

[0055] The protrusion 20 has a columnar base 30 and a convex portion 40 protruding outward from the outer periphery of the base 30. Hereinafter, the centerline direction of the base 30 may be referred to as the "centerline direction". Figure 4 The lower side and the upper side are respectively referred to as the “first side” and the “second side”.

[0056] (base 30)

[0057] The base portion 30 includes a base end portion 31 provided on the facing surface 12 side (second side), a terminal portion 32 provided at a location farthest from the facing surface 12 , and an intermediate portion 33 provided between the base end portion 31 and the terminal portion 32 .

[0058] like Figure 5 As shown, the shape of the base 30 when viewed along the center line direction is a shape in which a quadrilateral 30s having a width dimension equal to the diameter of the perfect circle (a dimension twice the radius of the semicircle 30c) is provided between the semicircles 30c obtained by dividing the perfect circle into two parts (hereinafter, this shape is sometimes referred to as an "ellipse"). In addition, the shape of the base 30 when viewed along the center line direction is not limited to an elongated circle as in the present embodiment, as long as the dimension in the winding direction is larger than the radial direction. For example, it may be an ellipse, a rounded rectangle, or a triangle.

[0059] For example, Figure 6 As shown, the base end portion 31 has a shape in which a quadrilateral 31s having a width dimension equal to the diameter of the perfect circle (a dimension twice the radius 31r of the semicircle 31c) is provided between semicircles 31c obtained by dividing a perfect circle into two.

[0060] like Figure 7 As shown, the terminal portion 32 has a shape in which a quadrilateral 32s having a width dimension equal to the diameter of the perfect circle (a dimension twice the radius 32r of the semicircle 32c) is provided between semicircles 32c obtained by dividing a perfect circle into two.

[0061] like Figure 8 As shown, the middle portion 33 is shaped such that a quadrilateral 33s having a width dimension equal to the diameter of the perfect circle (a dimension twice the radius 33r of the semicircle 33c) is provided between semicircles 33c obtained by dividing a perfect circle into two.

[0062] And, if Fig. 9 As shown, the radius 33r of the semicircle 33c of the middle portion 33 gradually decreases from the base end portion 31 side toward the distal end portion 32 side. In addition, the radius 32r of the semicircle 32c of the distal end portion 32 gradually decreases as it moves away from the middle portion 33.

[0063] In other words, the angle θ32 formed between the outer circumference of the distal end portion 32 and the centerline direction is greater than the angle θ33 formed between the outer circumference of the intermediate portion 33 and the centerline direction.

[0064] (convex portion 40)

[0065] like Fig. 9 and Fig.10 As shown, the projection 40 is a portion that projects outward from the outer peripheral surface of the base end portion 31 .

[0066] In addition, if Figure 5 As shown, four protrusions 40 are provided in the circumferential direction of the outer peripheral surface of the base end portion 31. More specifically, one protrusion 40 is provided on each of the outer peripheral surfaces of the two semicircles 31c, and one protrusion 40 is provided on each of the two outer peripheral surfaces in the longitudinal direction of the quadrilateral 31s.

[0067] The convex portion 40 is provided at a position on the first side of the base end portion 31. The outer peripheral surface of the convex portion 40 is provided in a manner continuous with the outer peripheral surface of the intermediate portion 33, and the outer peripheral surface of the convex portion 40 is inclined relative to the center line direction. The amount of change in the protrusion amount M of the outer peripheral surface of the convex portion 40 protruding from the base end portion 31 is the same as the amount of change in the radius 33r of the semicircle 33c of the intermediate portion 33, and the angle θ40 formed by the outer peripheral surface of the convex portion 40 and the center line direction is equal to the angle θ33 formed by the outer peripheral surface of the intermediate portion 33 and the center line direction.

[0068] Therefore, if Fig.10 As shown, the outer peripheral portion of the second side end portion of the convex portion 40 is an outer edge 41 of the convex portion 40 , and the outer edge 41 of the convex portion 40 is most protruding from the base end portion 31 in a direction parallel to the facing surface 12 .

[0069] In a direction parallel to the facing surface 12, Figure 4 The dimension L1 between the outer edges 41 of the two convex portions 40 facing each other in the winding direction is larger than the dimension H1 of the through hole 134 (see Figure 3 )big.

[0070] In a direction parallel to the facing surface 12, Fig. 9 The dimension L2 between the outer edges 41 of the two radially opposed protrusions 40 shown is larger than the dimension H2 of the through hole 134 (see Figure 3 )big.

[0071] The convex portion 40 has a concave portion 42 that is recessed toward a side away from the facing surface 12 between the outer edge 41 and the base end portion 31. The concave portion 42 has an inclined surface 43 that is inclined from the outer edge 41 relative to the facing surface 12 and a curved surface 44 that connects the inclined surface 43 and the outer peripheral surface of the base end portion 31. The curved surface 44 allows the outer edge 41 to be easily elastically deformed so as to approach the base end portion 31 side.

[0072] Fig.11 This is a diagram showing an example of a state in which the protrusion 20 is inserted into the through hole 134 of the spring support member 130 .

[0073] The elastic support component 1 constructed as above has the protrusion 20 inserted into the through hole 134 of the spring support component 130 while holding the end of the coil spring 120. More specifically, the protrusion 20 is inserted into the through hole 134 from the side of the terminal end portion 32. Thereafter, the two protrusions 40 opposed to each other in the winding direction and the two protrusions 40 opposed to each other in the radial direction come into contact with the edge of the through hole 134. Thereafter, when further inserted to the first side, the outer edge 41 of the protrusion 40 elastically deforms toward the base end portion 31 side, and the protrusion 40 passes through the through hole 134 and moves further toward the first side relative to the spring support component 130. Then, as Fig.11 As shown, the portion of the base end portion 31 of the protrusion 20 closer to the second side than the convex portion 40 is embedded in the through hole 134. Thus, when the portion of the base end portion 31 of the protrusion 20 closer to the second side than the convex portion 40 is embedded in the through hole 134, the convex portion 40 is located closer to the first side than the back surface 133 of the spring support member 130.

[0074] When the convex portion 40 passes through the through hole 134, the concave portion 42 is present between the outer edge 41 and the base end portion 31, so that the outer edge 41 is easily elastically deformed toward the base end portion 31. As a result, when the elastic support member 1 is assembled to the spring support member 130, the insertion load when the protrusion 20 is inserted into the through hole 134 is smaller than the insertion load of the structure in which the convex portion 40 does not have the concave portion 42.

[0075] The protrusion 40 is provided not around the entire periphery of the base 30 but only around a portion of the base 30. Therefore, according to the elastic support member 1, the insertion load is reduced compared with a structure in which a portion protruding outward from the base 30 is provided around the entire periphery of the base 30, for example.

[0076] Fig.12 This is a diagram showing an example of a state before the protrusion 20 is pulled out from the through hole 134 of the spring support member 130 .

[0077] When the protrusion 20 is to be pulled out from the through hole 134, the protrusion 40 is attached to the area around the through hole 134 on the back surface 133 of the spring support member 130, making it difficult to pull out. That is, the outer edge 41 moves in a direction away from the base end portion 31 side after contacting the back surface 133 of the spring support member 130, and the recess 42 is deformed so as to move to the second side, thereby increasing the contact area of ​​the inclined surface 43 and the curved surface 44 with the back surface 133 of the spring support member 130. As a result, the pull-out load for pulling out the protrusion 20 from the through hole 134 becomes larger than that of a structure in which the protrusion 40 does not have the recess 42.

[0078] In addition, one group of the four protrusions 40, which are respectively provided on the outer peripheral surfaces of the two semicircles 31c, is provided on the opposite side relative to the base 30. In other words, one group of the protrusions 40 is provided at positions opposite to each other across the base 30. In addition, another group of the four protrusions 40, which are respectively provided on the two outer peripheral surfaces in the long side direction of the quadrilateral 31s, is provided on the opposite side relative to the base 30. In other words, another group of the protrusions 40 is provided at positions opposite to each other across the base 30. Therefore, when the protrusion 20 is to be pulled out from the through hole 134, the protrusion 40 can be easily attached to the back surface 133 of the spring support member 130 with high reliability. As a result, according to the elastic support member 1, the pull-out load becomes large with high reliability.

[0079] As described above, the elastic support member 1 has the protrusion 20, which protrudes from the opposing surface 12 opposed to the spring support member 130 and is inserted into the through hole 134 formed in the spring support member 130. In addition, the protrusion 20 has a base 30 whose size in the direction parallel to the opposing surface 12 is smaller than the size of the through hole 134 in the direction parallel to the opposing surface 12, and is inserted into the through hole 134. In addition, the protrusion 20 has a convex portion 40, which protrudes outward from the outer peripheral portion of the base 30, and is located on the opposite side of the opposing surface 12 with respect to the spring support member 130 in a state where the base 30 is inserted into the through hole 134. In addition, the convex portion 40 has a concave portion 42 that is concave toward the side away from the opposing surface 12 between the convex portion 40 and the base 30.

[0080] As described above, according to the elastic support member 1 configured as above, when the convex portion 40 passes through the through hole 134, the convex portion 40 is easily elastically deformed toward the base portion 30, and the insertion load when the protrusion 20 is inserted into the through hole 134 is reduced. In addition, when the protrusion 20 is to be pulled out of the through hole 134, the convex portion 40 is easily attached to the spring support member 130, and the pull-out load is increased.

[0081] Here, a plurality of convex portions 40 are provided around the base portion 30. Therefore, for example, compared with a structure in which the convex portions 40 are formed over the entire circumference of the base portion 30, the area in which the convex portions 40 contact the edge of the through hole 134 becomes smaller. As a result, according to the elastic support member 1, the insertion load when the protrusion 20 is inserted into the through hole 134 becomes smaller.

[0082] In addition, in the elastic support member 1, two of the plurality of protrusions 40 are provided on the opposite side to the base 30, that is, provided at positions facing each other across the base 30, and the dimension between the outer edges 41 of the two protrusions 40 in the direction parallel to the facing surface 12 is larger than the dimension of the through hole 134 in the direction parallel to the facing surface 12. Thus, when the protrusion 20 is to be pulled out from the through hole 134, the protrusion 40 is easily attached to the back surface 133 of the spring support member 130 with high reliability, and the pull-out load becomes large.

[0083] The cross-sectional shape of the base 30 parallel to the facing surface 12 is an elongated circle with a quadrilateral 30s having the same width as the diameter of the perfect circle provided between the semicircle 30c obtained by dividing the perfect circle into two parts. Thus, for example, the protrusion 20 and the through hole 134 can be enlarged compared to the case where the base 30 and the through hole 134 are perfect circles.

[0084] In addition, as described above, the shape is not limited to an elongated circle, and any shape may be used as long as the dimension in the winding direction is larger than that in the radial direction.

[0085] In addition, the dimension of the terminal portion 32 and the middle portion 33, which are an example of a portion of the base 30 that is farther away from the opposing surface 12 than the protrusion 40, in the depth direction of the through hole 134, in other words, the dimension in the center line direction, is larger than the dimension of the through hole 134 itself in the depth direction.

[0086] Therefore, when the elastic supporting member 1 is assembled to the spring supporting member 130, when the terminal portion 32 and the middle portion 33 of the protruding portion 20 of the elastic supporting member 1 are inserted into the through hole 134, the amount by which the terminal portion 32 protrudes from the back surface 133 of the spring supporting member 130 to the first side becomes larger, and by checking the portion protruding from the back surface 133 to the first side with a hand feel, a sensor, etc., it is easy to check whether the elastic supporting member 1 is set at the correct position relative to the spring supporting member 130. As a result, when the elastic supporting member 1 is assembled to the spring supporting member 130, it is easy to position the elastic supporting member 1 and the spring supporting member 130. In addition, the shape of the base 30 and the through hole 134 may be an ellipse with the minor axis in the radial direction.

[0087] Furthermore, the facing surface 12 of the elastic support member 1 may be a surface in which the central portion of the facing surface 12 in the radial direction is recessed toward the second side before the elastic support member 1 is assembled to the coil spring 120 and the spring support member 130, and the facing surface 12 is in contact with the mounting surface 132 of the spring support member 130 and is parallel to the mounting surface 132 when the elastic support member 1 is assembled to the coil spring 120 and the spring support member 130. That is, the direction parallel to the facing surface 12 is, in other words, the direction parallel to the mounting surface 132.

Claims

1. An elastic supporting member interposed between a spring and a spring supporting member supporting an end of the spring, wherein: The elastic support member has a protrusion protruding from a surface facing the spring support member, and the protrusion is inserted into a through hole formed in the spring support member. The protrusion has: a base portion, the dimension of which in a direction parallel to the opposing surface is smaller than the dimension of the through hole in a direction parallel to the opposing surface, the base portion being embedded in the through hole; as well as a convex portion protruding outward from the outer peripheral portion of the base portion, and being located on the side opposite to the facing surface with respect to the spring support member when the base portion is fitted into the through hole, The convex portion has a concave portion between the convex portion and the base portion, the concave portion being concave toward a side away from the facing surface.

2. The elastic supporting member according to claim 1, wherein: A plurality of the protrusions are provided around the base.

3. The elastic supporting member according to claim 2, wherein: Two of the plurality of protrusions are provided on opposite sides of the base, and a dimension between outer edges of the two protrusions in a direction parallel to the facing surface is larger than a dimension of the through hole.

4. The elastic supporting member according to claim 1, wherein: Regarding the cross-sectional shape of the base portion parallel to the facing surface, a dimension in the winding direction of the spring is larger than a dimension in the radial direction of the spring.

5. The elastic supporting member according to claim 1, wherein: A portion of the base portion that is farther from the facing surface than the convex portion is from the facing surface has a dimension in the depth direction of the through hole that is larger than a dimension of the through hole itself in the depth direction.

6. A suspension device, comprising: spring; a spring supporting member that supports an end portion of the spring; and The elastic supporting member according to any one of claims 1 to 5, which is interposed between the spring and the spring supporting member.

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