fastener

Abstract

To provide a fastener capable of suppressing impact caused by pressure applied through the fastener. [Solution] In the fastener (1), a male body (10) and a female body (20) are removably attached to each other. The male body (10) comprises a flat plate portion (11) and a column-shaped column portion (12) protruding from the flat plate portion (11) in a direction perpendicular to the flat plate portion (11). The female body (20) comprises an outer ring portion (21) and a raised portion (22). The outer ring portion (21) is annular and extends along a second reference plane. The raised portion (22) extends from the outer ring portion (21) toward the center of the outer ring portion (21) and rises so that its distance from the second reference plane increases the closer it is to the center of the outer ring portion (21). The center of the outer ring portion (21) has an insertion hole (22a) into which the column portion (12) is inserted. When the female body (20) is pressed by the male body (10) in a direction perpendicular to the second reference plane with the column portion (12) inserted in the insertion hole (22a), the female body (20) elastically deforms so that the distance of the raised portion (22) from the second reference plane decreases.

Description

[Technical Field]

[0001] The present invention relates to a fastener. [Background technology]

[0002] Fasteners are known that include a male body and a female body, and the male body and the female body are removably attached to each other. For example, the fastener described in Patent Document 1 has a male body and a female body fixed to a pair of ends of a fabric that constitutes a garment. The male body is cylindrical. The female body is annular with a cylindrical hole into which the male body fits. The fastener is cylindrical when the male body and the female body are attached to each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-34872 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when an object such as the back of a chair, the floor, or a wall presses against the body via the fastener, a user wearing clothing to which the fastener is attached may feel pain due to the impact caused by the pressure via the fastener.

[0005] However, when the male and female bodies of the fastener are attached to each other, the impact caused by the pressure through the fastener is directly transmitted to the body. Therefore, with the fastener, there is a risk that a user wearing a garment to which the fastener is fixed may feel excessive pain due to the impact caused by the pressure through the fastener. Note that this type of problem can also occur when the fastener is used on something other than clothing. For example, there is a risk that the impact caused by the pressure through the fastener may damage the component to which the fastener is fixed.

[0006] One of the objects of the present invention is to suppress the impact caused by pressure applied via a fastener. [Means for solving the problem]

[0007] In one aspect of the present invention, a fastener includes a male body and a female body, and the male body and the female body are removably attached to each other. The male body includes a flat plate portion extending along the first reference plane, and a column portion protruding from the flat plate portion in a direction perpendicular to the first reference plane.

[0008] The female body includes an outer ring portion and a protruding portion. The outer annular portion has an annular shape and extends along the second reference plane. The raised portion extends from the outer ring portion toward the center of the outer ring portion, and rises so that the distance from the second reference plane increases the closer it is to the center of the outer ring portion, and has an insertion hole at the center of the outer ring portion into which the pillar portion is inserted. When the female body is pressed by the male body in a direction perpendicular to the second reference plane with the column portion inserted into the insertion hole, the female body elastically deforms so that the distance of the protrusion from the second reference plane becomes shorter. [Effects of the Invention]

[0009] It is possible to suppress the impact caused by pressure applied via the fastener. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of the fastener in the first embodiment in an exploded state. [Figure 2] FIG. 2 is a perspective view of the fastener in the first embodiment in an exploded state. [Figure 3] FIG. 2 is a rear view of the fastener in the disassembled state according to the first embodiment. [Figure 4] FIG. 2 is a plan view of the male body of the first embodiment. [Figure 5] FIG. 2 is a bottom view of the male body of the first embodiment. [Figure 6] FIG. 2 is a plan view of the female body of the first embodiment. [Figure 7] FIG. 2 is a bottom view of the female body of the first embodiment. [Figure 8] 1 is a perspective view of a fastener in a state in which a male body and a female body are attached to each other in a first embodiment. FIG. [Figure 9] 1 is a perspective view of a fastener in a state in which a male body and a female body are attached to each other in a first embodiment. FIG. [Figure 10] FIG. 2 is a bottom view of the fastener in the first embodiment, in which the male body and the female body are attached to each other. [Figure 11] FIG. 2 is a rear view of the fastener in the first embodiment, in which the male body and the female body are attached to each other. [Figure 12] 1 is a plan view of a fastener in a state in which a male body and a female body are attached to each other in a first embodiment. FIG. [Figure 13] 1 is a cross-sectional view of a fastener in a state in which a male body and a female body are attached to each other in a first embodiment. [Figure 14] FIG. 1A is a cross-sectional view of the fastener in a state where the female body is not pressed by the male body, and FIG. 1B is a cross-sectional view of the fastener in a state where the female body is pressed by the male body. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, various embodiments of the fastener of the present invention will be described with reference to FIGS.

[0012] First Embodiment (overview) The fastener of the first embodiment includes a male body and a female body, and the male body and the female body are removably attached to each other. The male body includes a flat plate portion extending along the first reference plane, and a column portion protruding from the flat plate portion in a direction perpendicular to the first reference plane.

[0013] The female body includes an outer ring portion and a protruding portion. The outer annular portion has an annular shape and extends along the second reference plane. The raised portion extends from the outer ring portion toward the center of the outer ring portion, and rises so that the distance from the second reference plane increases the closer it is to the center of the outer ring portion, and has an insertion hole at the center of the outer ring portion into which the pillar portion is inserted. When the female body is pressed by the male body in a direction perpendicular to the second reference plane with the column portion inserted into the insertion hole, the female body elastically deforms so that the distance of the protrusion from the second reference plane becomes shorter.

[0014] According to this, when the fastener is pressed in a direction perpendicular to the flat plate portion while the male body and female body are attached to each other, the female body elastically deforms so that the distance of the protruding portion from the second reference plane decreases. This absorbs the impact caused by the pressing. As a result, the impact caused by the pressing via the fastener can be suppressed. Therefore, for example, when the fastener is used on clothing, the pain felt by the user due to the impact caused by the pressing via the fastener can be suppressed. Next, the fastener of the first embodiment will be described in more detail.

[0015] (composition) The fastener 1 of the first embodiment will be described below using a right-handed Cartesian coordinate system having an x-axis, a y-axis, and a z-axis as shown in FIGS.

[0016] In this example, the x-axis direction, the y-axis direction, and the z-axis direction may be respectively expressed as the left-right direction of the fastener 1, the front-rear direction of the fastener 1, and the up-down direction of the fastener 1. Also, in this example, the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, the positive direction of the z-axis, and the negative direction of the z-axis may be respectively expressed as the right direction of the fastener 1, the left direction of the fastener 1, the front direction of the fastener 1, the rear direction of the fastener 1, the up direction of the fastener 1, and the down direction of the fastener 1.

[0017] 1 to 3, fastener 1 includes a male body 10 and a female body 20. In fastener 1, male body 10 and female body 20 are removably attached to each other. Fastener 1 may also be referred to as a snap button.

[0018] In this example, the male body 10 and the female body 20 are each made of an elastomer resin. However, the male body 10 and the female body 20 may each be made of a resin other than the elastomer resin (for example, a polyethylene resin or a polypropylene resin). Also, the male body 10 and the female body 20 may each be made of a resin different from the elastomer resin.

[0019] Fig. 1 is a view of the fastener 1 when the male body 10 and the female body 20 are detached from each other (in other words, when the fastener 1 is disassembled), showing the fastener 1 viewed from a position to the right of the fastener 1, behind the fastener 1, and above the fastener 1 (in other words, a right-rear-upper perspective view). Fig. 2 is a view of the fastener 1 when the fastener 1 is disassembled, showing the fastener 1 viewed from a position to the right of the fastener 1, behind the fastener 1, and below the fastener 1 (in other words, a right-rear-lower perspective view). Fig. 3 is a view of the fastener 1 when the fastener 1 is disassembled, showing the fastener 1 viewed from behind the fastener 1 (in other words, a back view).

[0020] Fig. 4 is a view of the male body 10 seen from above (in other words, a plan view). Fig. 5 is a view of the male body 10 seen from below (in other words, a bottom view). Fig. 6 is a plan view of the female body 20. Fig. 7 is a bottom view of the female body 20.

[0021] Fig. 8 is a right rear upper perspective view of the fastener 1 in a state where the male body 10 and the female body 20 are attached to each other. Fig. 9 is a right rear lower perspective view of the fastener 1 in a state where the male body 10 and the female body 20 are attached to each other. Fig. 10 is a bottom view of the fastener 1 in a state where the male body 10 and the female body 20 are attached to each other. Fig. 11 is a rear view of the fastener 1 in a state where the male body 10 and the female body 20 are attached to each other.

[0022] Fig. 12 is a plan view of the fastener 1 in a state in which the male body 10 and the female body 20 are attached to each other. Fig. 13 is a view of a cross section of the fastener 1 taken along the plane represented by line XIII-XIII in Fig. 12, viewed in the positive direction of the y-axis. Fig. 14 is a cross section of the fastener 1 in a state in which the male body 10 and the female body 20 are attached to each other. Fig. 14(A) shows a state in which the female body 20 is not pressed by the male body 10, and Fig. 14(B) shows a state in which the female body 20 is pressed by the male body 10.

[0023] In this example, fastener 1 is used to removably fasten a pair of edges of fabric constituting a garment together. For example, the pair of edges form an opening or a joining portion in the garment. For example, the garment is underwear.

[0024] Fastener 1 may be used on clothing other than underwear (for example, outerwear such as a shirt, sweater, trousers, or skirt). Fastener 1 may also be used on clothing other than clothing (for example, hats, shoes, or gloves). Fastener 1 may also be used on items other than clothing (for example, bags, purses, wallets, drawstring pouches, pouches, business card holders, cigarette cases, or bags such as handbags).

[0025] In this example, the male body 10 is fixed (in this example, sewn) to one of a pair of ends of the fabric, and the female body 20 is fixed (in this example, sewn) to the other of the pair of ends of the fabric. Note that the male body 10 and the female body 20 may each be fixed to the fabric by a method other than sewing (for example, adhesive, etc.). Also, the male body 10 and the female body 20 may be fixed to a material other than fabric (for example, leather, etc.).

[0026] As shown in FIGS. 1 to 5, the male body 10 includes a flat plate portion 11 and a pillar portion 12. The flat plate portion 11 has a flat plate shape extending along a first reference plane, which is a plane perpendicular to the z-axis. In this example, the end face of the flat plate portion 11 in the positive direction of the z-axis corresponds to the first reference plane. As shown in Figures 4 and 5, in this example, the flat plate portion 11 has a circular shape when the male body 10 is viewed in the z-axis direction.

[0027] The flat plate portion 11 has a plurality of oblong holes 11a. In this example, the number of oblong holes 11a that the flat plate portion 11 has is four. The number of oblong holes 11a that the flat plate portion 11 has may be two, three, five or more. Each oblong hole 11a penetrates the flat plate portion 11 in a direction perpendicular to the first reference plane (in this example, the z-axis direction). The plurality of oblong holes 11a extend along the outer periphery of the flat plate portion 11. In this example, the male body 10 is sewn to the fabric using the plurality of oblong holes 11a. The flat plate portion 11 may have a round hole instead of the elongated hole 11a.

[0028] 2 and 3, the pillar portion 12 is a pillar that protrudes from the flat plate portion 11 in a direction perpendicular to the first reference plane (in this example, the negative direction of the z-axis). As shown in Fig. 5, the pillar portion 12 is located at the center of the flat plate portion 11 when the male body 10 is viewed in the z-axis direction. As shown in Figs. 2, 3, and 5, in this example, the pillar portion 12 is a cylinder whose central axis extends in the z-axis direction and passes through the center of the flat plate portion 11.

[0029] 2, 5, and 13, the pillar portion 12 has a bottomed hole 12a that opens at an end face (in other words, at the tip) in the negative direction of the z axis. In this example, the hole 12a is cylindrical with a central axis that extends in the z axis direction and coincides with the central axis of the pillar portion 12. In this example, the depth of the hole 12a (in other words, the length of the hole 12a in the z axis direction) is approximately equal to the length of the pillar portion 12 in the z axis direction.

[0030] 2, 3, and 13, the column portion 12 has a first engagement portion 12b. The first engagement portion 12b protrudes from the outer peripheral surface of the column portion 12. The first engagement portion 12b has a circular ring shape whose central axis extends in the z-axis direction and coincides with the central axis of the column portion 12. The first engagement portion 12b is located slightly further in the positive direction of the z-axis than the tip of the column portion 12.

[0031] As shown in FIGS. 1 to 3, 6, and 7, the female body 20 includes an outer ring portion 21 and a protruding portion 22. The outer annular portion 21 is annular and extends along a second reference plane, which is a plane perpendicular to the z-axis. In this example, the end face of the outer annular portion 21 in the negative direction of the z-axis corresponds to the second reference plane. In this example, the outer annular portion 21 is annular and has a central axis extending in the z-axis direction.

[0032] 1 and 13, the outer ring portion 21 has a rim portion 21a. The rim portion 21a protrudes in the positive direction of the z-axis from the outer edge of the outer ring portion 21. The rim portion 21a has a circular ring shape whose central axis extends in the z-axis direction and coincides with the central axis of the outer ring portion 21. Note that the outer ring portion 21 does not necessarily have to have the rim portion 21a.

[0033] 1, 2, 6, 7, and 13, the outer ring portion 21 has a plurality of elongated holes 21b. In this example, the number of elongated holes 21b in the outer ring portion 21 is four. However, the number of elongated holes 21b in the outer ring portion 21 may be two, three, five or more.

[0034] Each oblong hole 21b penetrates the outer ring portion 21 in a direction perpendicular to the second reference plane (in this example, the z-axis direction). The multiple oblong holes 21b extend along the outer periphery of the outer ring portion 21. In this example, the multiple oblong holes 21b extend inward of and along the rim portion 21a. In this example, the female body 20 is sewn to the fabric using the multiple oblong holes 21b. The outer ring portion 21 may have a round hole instead of the elongated hole 21b.

[0035] 1 to 3, 6, 7, and 13, the raised portion 22 extends from the outer annular portion 21 toward the center of the outer annular portion 21. The raised portion 22 rises so that the distance from the second reference plane increases as it approaches the center of the outer annular portion 21. In other words, the raised portion 22 has a hollow truncated cone shape whose central axis extends in the z-axis direction and coincides with the central axis of the outer annular portion 21. In this example, as shown in FIG. 13, the raised portion 22 becomes thicker as it approaches the center of the outer annular portion 21.

[0036] The raised portion 22 has an insertion hole 22a. The column portion 12 is inserted into the insertion hole 22a at the center of the raised portion 22 (in other words, the center of the outer ring portion 21). The insertion hole 22a penetrates the raised portion 22 in a direction perpendicular to the second reference plane (in the z-axis direction in this example). In this example, the insertion hole 22a is cylindrical in shape, with its central axis extending in the z-axis direction and coinciding with the central axis of the outer ring portion 21. In this example, the diameter of the insertion hole 22a is slightly larger than the diameter of the column portion 12.

[0037] The protrusion 22 includes a second engagement portion 22a1. When the column portion 12 is inserted into the insertion hole 22a and is pulled out of the insertion hole 22a, the second engagement portion 22a1 engages with the first engagement portion 12b. In this example, the second engagement portion 22a1 is a protrusion that protrudes toward the central axis of the insertion hole 22a on the inner wall surface that forms the insertion hole 22a. The second engagement portion 22a1 may also be referred to as a claw.

[0038] In this example, the second engagement portion 22a1 has an annular shape extending in the circumferential direction about the central axis of the fitting hole 22a. In this example, the inner diameter of the second engagement portion 22a1 is slightly smaller than the outer diameter of the first engagement portion 12b and slightly larger than the diameter of the column portion 12. The second engagement portion 22a1 may be a plurality of protrusions spaced apart from one another in the circumferential direction relative to the central axis of the fitting hole 22a.

[0039] 8, 12, and 13, in this example, when the fastener 1 is viewed in a direction perpendicular to the second reference plane (in this example, the z-axis direction) with the post portion 12 fitted into the fitting hole 22a, the flat portion 11 is contained within the raised portion 22. In other words, in this example, the diameter of the flat portion 11 is shorter than the diameter of the raised portion 22 (in other words, the inner diameter of the outer ring portion 21).

[0040] As shown in Fig. 14, when the female body 20 is pressed by the male body 10 in a direction perpendicular to the second reference plane (in this example, the negative direction of the z-axis) with the column portion 12 inserted into the insertion hole 22a, the female body 20 elastically deforms so that the distance of the protrusion 22 from the second reference plane (in other words, the length of the female body 20 in the z-axis direction) becomes shorter. Fig. 14(A) shows a state in which the female body 20 is not pressed by the male body 10, and Fig. 14(B) shows a state in which the female body 20 is pressed by the male body 10.

[0041] In this example, the corners of the male body 10 and the female body 20 are each rounded, which reduces the pain felt by the user when touching the fastener 1. It should be noted that the corners of the male body 10 and the female body 20 may not necessarily be rounded.

[0042] (operation) Next, the operation of the fastener 1 of the first embodiment will be described. 1 to 3, with the male body 10 and the female body 20 detached from each other, the male body 10 is moved relative to the female body 20 in the negative direction of the z-axis. As a result, the pillar portion 12 is fitted into the fitting hole 22a. Then, the first engagement portion 12b engages with the second engagement portion 22a1. In this state, the male body 10 is further pressed in the negative direction of the z-axis, causing the pillar portion 12 to elastically deform so as to reduce its diameter. As a result, the first engagement portion 12b passes through the second engagement portion 22a1, and the pillar portion 12 is fitted into the fitting hole 22a so that the first engagement portion 12b is positioned further in the negative direction of the z-axis than the second engagement portion 22a1.

[0043] As a result, as shown in Figs. 8 to 13, the fastener 1 is in a state in which the male body 10 and the female body 20 are attached to each other. As shown in (B) of Figure 14, in this state, when the female body 20 is pressed by the male body 10 in a direction perpendicular to the second reference plane (in this example, the negative direction of the z-axis), it elastically deforms so that the distance of the protrusion 22 from the second reference plane (in other words, the length of the female body 20 in the z-axis direction) becomes shorter.

[0044] Thereafter, the male body 10 is moved in the positive direction of the z-axis relative to the female body 20. Then, the first engagement portion 12b engages with the second engagement portion 22a1. In this state, a tensile force is further applied to the male body 10 in the positive direction of the z-axis, causing the pillar portion 12 to elastically deform so as to reduce in diameter. As a result, the first engagement portion 12b passes through the second engagement portion 22a1, and the pillar portion 12 is pulled out of the insertion hole 22a. As a result, as shown in Figs. 1 to 3, the fastener 1 is in a state where the male body 10 and the female body 20 are detached from each other.

[0045] As described above, the fastener 1 of the first embodiment comprises the male body 10 and the female body 20, and the male body 10 and the female body 20 are removably attached to each other. The male body 10 includes a flat plate portion 11 extending along a first reference plane, and a columnar portion 12 protruding from the flat plate portion 11 in a direction perpendicular to the first reference plane.

[0046] The female body 20 includes an outer ring portion 21 and a protruding portion 22 . The outer annular portion 21 has an annular shape that extends along the second reference plane. The raised portion 22 extends from the outer ring portion 21 toward the center of the outer ring portion 21, and rises so that the distance from the second reference plane becomes longer the closer it is to the center of the outer ring portion 21, and has an insertion hole 22a at the center of the outer ring portion 21 into which the column portion 12 is inserted. When the female body 20 is pressed by the male body 10 in a direction perpendicular to the second reference plane while the column portion 12 is inserted into the insertion hole 22a, the female body 20 elastically deforms so that the distance of the protrusion 22 from the second reference plane becomes shorter.

[0047] According to this, when fastener 1 is pressed in a direction perpendicular to flat plate portion 11 while male body 10 and female body 20 are attached to each other, female body 20 elastically deforms so that the distance of protruding portion 22 from the second reference plane becomes shorter. This absorbs the impact caused by the pressing. As a result, the impact caused by pressing via fastener 1 can be suppressed. Therefore, for example, when fastener 1 is used on clothing, the pain felt by the user due to the impact caused by pressing via fastener 1 can be suppressed.

[0048] Furthermore, in the fastener 1 of the first embodiment, the male body 10 has a first engagement portion 12b that protrudes from the outer peripheral surface of the post portion 12. The female body 20 has a second engagement portion 22a1 that engages with the first engagement portion 12b when the post portion 12 is pulled out of the insertion hole 22a while the post portion 12 is inserted into the insertion hole 22a.

[0049] With this, when the pillar portion 12 is inserted into the insertion hole 22a, the first engaging portion 12b and the second engaging portion 22a1 engage with each other when the pillar portion 12 is pulled out of the insertion hole 22a. This makes it easy to attach and detach the male body 10 and the female body 20, while preventing the male body 10 from falling off the female body 20.

[0050] Furthermore, in the fastener 1 of the first embodiment, the post portion 12 has a hole 12a that opens at the tip end.

[0051] This makes it easier for the pillar portion 12 to elastically deform when it is fitted into the fitting hole 22a. This allows the pillar portion 12 to be made sufficiently large relative to the fitting hole 22a, making it easier to attach and detach the male body 10 and the female body 20 while preventing the male body 10 from falling off the female body 20.

[0052] Furthermore, in the fastener 1 of the first embodiment, when the column portion 12 is inserted into the insertion hole 22a and the fastener 1 is viewed in a direction perpendicular to the second reference plane, the flat portion 11 is contained within the raised portion 22.

[0053] This prevents the flat plate portion 11 and the outer ring portion 21 from overlapping when the fastener 1 is pressed in a direction perpendicular to the second reference plane with the post portion 12 inserted into the insertion hole 22a. Therefore, the elastic deformation of the protrusions 22 absorbs the impact caused by the pressure via the fastener 1 over the entire flat plate portion 11. As a result, the impact caused by the pressure via the fastener 1 can be sufficiently suppressed.

[0054] Furthermore, in the fastener 1 of the first embodiment, the outer ring portion 21 has a plurality of elongated holes 21b that penetrate the outer ring portion 21 in a direction perpendicular to the second reference plane and extend along the outer periphery of the outer ring portion 21.

[0055] However, if the area of ​​the raised portion 22 that is pressed in the direction along the second reference plane becomes excessively wide, there is a risk that the elastic deformation of the raised portion 22 will be suppressed. In contrast, with the fastener 1 described above, even when the outer ring portion 21 is pressed along the second reference plane, the area of ​​the raised portion 22 that is pressed in the direction along the second reference plane can be narrowed. As a result, excessive suppression of the elastic deformation of the raised portion 22 can be avoided. As a result, the impact caused by pressing via the fastener 1 can be sufficiently suppressed.

[0056] The present invention is not limited to the above-described embodiment. For example, various modifications that can be understood by those skilled in the art may be made to the above-described embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0057] 1 Fastener 10 Male body 11 Flat plate part 11a long hole 12 Pillar section 12a hole 12b First engaging part 20 Female body 21 Outer ring 21a rim 21b Long hole 22 Ridge 22a Inset hole 22a1 The second series

Claims

1. A fastener comprising a male body and a female body, the male body and the female body being removably attached to each other, The male body a flat plate portion extending along a first reference plane; a columnar portion protruding from the flat plate portion in a direction perpendicular to the first reference plane; Equipped with The female body is an outer ring portion that is annular and extends along the second reference plane; a protruding portion having a hollow truncated cone shape that extends from the outer ring portion toward the center of the outer ring portion and protrudes so that the distance from the second reference plane increases as the protruding portion approaches the center of the outer ring portion, and that has an insertion hole at the center of the outer ring portion into which the column portion is inserted; Equipped with When the female body is pressed by the male body in a direction perpendicular to the second reference plane with the column portion inserted into the insertion hole, the female body elastically deforms so that the distance from the second reference plane of the inner surface of the raised portion becomes shorter.

2. The fastener according to claim 1, The male body has a first engaging portion protruding from the outer circumferential surface of the column portion, The female body has a second engagement portion that engages with the first engagement portion when the post portion is pulled out of the insertion hole while the post portion is inserted into the insertion hole.

3. The fastener according to claim 2, The post has a hole that opens at its tip.

4. The fastener according to claim 1 or claim 2, A fastener in which, when the column portion is inserted into the insertion hole and the fastener is viewed in a direction perpendicular to the second reference plane, the flat portion is contained within the raised portion.

5. The fastener according to claim 1 or claim 2, The fastener has a plurality of elongated holes that penetrate the outer ring portion in a direction perpendicular to the second reference plane and extend along the outer periphery of the outer ring portion.

Images