Fastener

Abstract

To provide a fastener which hardly comes off from a mounting member even when the diameter of a hole formed in the mounting member varies.SOLUTION: The fastener 2 includes the first member 3 that is inserted into the hole 53 of the mounting member 5 at the A1 in the first direction from the first surface 51 to the second surface 52 of the mounting member 5 and is held by the mounting member 5, and the second member 4 that is inserted into the hole 53 of the mounting member 5 at the A2 in the second direction from the second surface 52 to the first surface 51 of the mounting member 5 and engages with the first member 3. The first member 3 includes a first flange portion 31 that abuts against the first surface 51 of the mounting member 5, a first sidewall portion 32 that protrudes from the first flange portion 31 toward the A1 in the first direction and is inserted into the hole 53, and an elastic piece 33 that is flexibly connected to the first sidewall portion 32 or the first flange portion 31. The first member 3 is held by the mounting member 5 by the tip end portion 332 of the elastic piece 33 abutting against the inner surface 531 of the hole 53 in a state where the elastic piece 33 is bent.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fastener that is attached to a mounting member and closes a hole formed in the mounting member. [Background technology]

[0002] Patent Document 1 discloses a mat fastener that prevents movement of a mat placed on a vehicle floor. The mat fastener described in Patent Document 1 includes a second fixing member that is fixed to the mat. The second fixing member has a front member and a back member, and is fixed to the mat by sandwiching the edge of the mat mounting hole between the front member and the back member. At this time, the tubular portion of the back member is inserted into the mat mounting hole.

[0003] The second fixing member is fixed to the mat by sandwiching the edge of the mat mounting hole between the front and rear members. Therefore, if the diameter of the mat mounting hole varies and a gap is created between the inner surface of the mat mounting hole and the outer surface of the tubular portion of the rear member, the second fixing member may move relative to the mat. This could cause the second fixing member to come off the mat. In this respect, the mat fastener described in Patent Document 1 leaves room for improvement.

[0004] For example, in fasteners attached to mounting members such as mats and panels, it is desirable to prevent the fastener from moving relative to the mounting member and from coming off the mounting member even if there is variation in the diameter of the holes formed in the mounting member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6321475 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a fastener that is less likely to come off from a mounting member even if there is variation in the diameter of the hole formed in the mounting member. [Means for solving the problem]

[0007] One aspect of the present invention is a fastener that is attached to a mounting member and closes a hole formed in the mounting member, comprising: a first member that is inserted into the hole in a first direction from a first surface of the mounting member toward a second surface opposite the first surface and is held by the mounting member; and a second member that is inserted into the hole in a second direction from the second surface toward the first surface and engages with the first member, wherein the first member has a first flange portion that abuts the first surface, a first side wall portion that protrudes from the first flange portion in the first direction and is inserted into the hole, and an elastic piece that is flexibly connected to the first side wall portion or the first flange portion, and the second member has a second flange portion that abuts the second surface and a second side wall portion that protrudes from the second flange portion in the second direction and is inserted into the hole and engages with the first side wall portion, and the first member is held on the mounting member by the tip of the elastic piece abutting against the inner surface of the hole when the elastic piece is in a flexed state.

[0008] According to one aspect of the present invention, the tip of the elastic piece does not engage with the edge of the hole in the mounting member, but rather the tip of the elastic piece abuts against the inner surface of the hole in the mounting member when the elastic piece is bent, thereby holding the first component to the mounting member. The second side wall of the second component is inserted into the hole in the mounting member and engages with the first side wall of the first component held by the mounting member. Therefore, even if the diameter of the hole formed in the mounting member varies, the first component can be prevented from moving relative to the mounting member. This prevents the fastener from coming off the mounting member. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a fastener that is unlikely to come off from a mounting member even if there is variation in the diameter of the hole formed in the mounting member. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view of a fastener according to an embodiment of the present invention, viewed from the first member side. [Figure 2] FIG. 2 is an exploded perspective view of the fastener according to the present embodiment, viewed from the second member side. [Figure 3] FIG. 2 is a perspective view of the fastener according to the present embodiment, viewed from the first member side. [Figure 4] FIG. 2 is a perspective view of the fastener according to the present embodiment, viewed from the second member side. [Figure 5] FIG. 2 is a perspective view illustrating a first member of the present embodiment. [Figure 6] FIG. 6 is an enlarged cross-sectional view of an area A15 shown in FIG. 5. [Figure 7] 10 is a perspective view of the second member of the present embodiment as viewed from the second side wall portion side. FIG. [Figure 8] 4 is a perspective view of the second member of the present embodiment as viewed from the second flange portion side. FIG. [Figure 9] 4 is a cross-sectional view illustrating a state in which a first member of the present embodiment is held by a mounting member. FIG. [Figure 10] 3 is a cross-sectional view illustrating a state in which a first member and a second member of the present embodiment are engaged with each other. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiments described below are preferred examples of the present invention, and therefore various technically preferable limitations are applied thereto, but the scope of the present invention is not limited to these aspects unless otherwise specified in the following description to the effect that the present invention is particularly limited. Furthermore, in each drawing, similar components are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

[0012] FIG. 1 is an exploded perspective view of a fastener according to an embodiment of the present invention, viewed from the first member side. FIG. 2 is an exploded perspective view of the fastener according to this embodiment, viewed from the second member side. FIG. 3 is a perspective view of the fastener according to this embodiment as viewed from the first member side. FIG. 4 is a perspective view of the fastener according to this embodiment as viewed from the second member side. 3 and 4 show a state in which the first member and the second member are engaged with each other.

[0013] 3 and 4, the fastener 2 according to this embodiment is attached to a mounting member 5 and closes a hole 53 formed in the mounting member 5. The fastener 2 includes a first member 3 and a second member 4.

[0014] The first member 3 has a first flange portion 31, a first side wall portion 32, and a first elastic piece 33. As shown in FIGS. 1 and 2, the first member 3 is inserted into the hole 53 in a first direction A1 from the first surface 51 of the mounting member 5 toward the second surface 52 of the mounting member 5. Specifically, the first side wall portion 32 and the first elastic piece 33 are inserted into the hole 53. As a result, the first member 3 is held by the mounting member 5. Details of the state in which the first member 3 is held by the mounting member 5 will be described later. The second surface 52 of the mounting member 5 is the surface opposite to the first surface 51 of the mounting member 5.

[0015] 3, when the first member 3 is inserted into the hole 53 from the first surface 51 toward the second surface 52, the first flange portion 31 abuts against the first surface 51 of the mounting member 5. This stops the insertion of the first member 3 into the hole 53.

[0016] The second member 4 has a second flange portion 41 and a second side wall portion 42. As shown in FIGS. 1 and 2 , the second member 4 is inserted into the hole 53 in a second direction A2 from the second surface 52 of the mounting member 5 toward the first surface 51 of the mounting member 5. Specifically, the second side wall portion 42 is inserted into the hole 53 and into the first side wall portion 32. Then, the second engagement portion 44 provided on the second side wall portion 42 engages with the first engagement portion 34 provided on the first side wall portion 32. This engages the second side wall portion 42 with the first side wall portion 32. Details of the engagement between the first engagement portion 34 and the second engagement portion 44 will be described later. In this manner, the second member 4 engages with the first member 3. The second direction A2 faces the first direction A1.

[0017] When the second member 4 is inserted into the hole 53 of the mounting member 5 and engages with the first member 3, the second flange portion 41 abuts against the second surface 52 of the mounting member 5. Specifically, as shown in FIGS. 1 and 2, the second flange portion 41 has a second elastic piece 411. The second elastic piece 411 is provided to be flexible (i.e., elastically deformable) and extends at an angle toward the second direction A2. As shown in FIG. 4, when the second member 4 is inserted into the hole 53 of the mounting member 5 and engages with the first member 3, the second elastic piece 411 abuts against the second surface 52 of the mounting member 5 while bending (i.e., elastically deforming) in the first direction A1. As a result, the second member 4 engages with the first member 3 while being biased in the first direction A1. Therefore, the first engagement portion 34 and the second engagement portion 44 are more firmly engaged with each other.

[0018] 1 and 2, the first side wall portion 32 of the first member 3 protrudes from the first flange portion 31 in the first direction A1. That is, the first side wall portion 32 protrudes from the first flange portion 31 toward the second member 4. The first side wall portion 32 is provided around the central portion 312 of the first flange portion 31 so as to surround the central portion 312 of the first flange portion 31. As shown in FIG. 2, the first side wall portion 32 of this embodiment extends in a substantially rectangular shape around the central portion 312 of the first flange portion 31. However, the shape of the first side wall portion 32 is not limited to a substantially rectangular shape and may be, for example, a circular shape.

[0019] The first elastic piece 33 of the first member 3 is flexibly connected to the first side wall portion 32 and has an arm portion 331 and a tip portion 332. Note that the first elastic piece 33 of the first member 3 may be flexibly connected to the first flange portion 31. The arm portion 331 is flexibly connected to the first side wall portion 32 and extends in the circumferential direction of the first side wall portion 32. The tip portion 332 is provided at one end of the arm portion 331, i.e., at the end opposite to the end where the arm portion 331 is connected to the first side wall portion 32, and protrudes outward from the first side wall portion 32 in a direction intersecting the first direction A1. Specifically, the tip portion 332 protrudes outward from one end of the arm portion 331 in a direction perpendicular to the first direction A1.

[0020] The second side wall portion 42 of the second member 4 protrudes from the second flange portion 41 in the second direction A2. That is, the second side wall portion 42 protrudes from the second flange portion 41 toward the first member 3. The second side wall portion 42 is provided around the central portion 412 of the second flange portion 41 so as to surround the central portion 412 of the second flange portion 41. As shown in FIG. 1 , the second side wall portion 42 of this embodiment extends in a shape in which the four corners (i.e., the four corners) of the substantially rectangular shape are recessed inward around the central portion 412 of the second flange portion 41. However, the shape of the second side wall portion 42 is not limited to the shape shown in FIG. 1 and may be, for example, a circular shape.

[0021] Next, the first member 3 of this embodiment will be further described with reference to the drawings. FIG. 5 is a perspective view showing the first member of the present embodiment. FIG. 6 is an enlarged cross-sectional view of an area A15 shown in FIG. 6 is a cross-sectional view taken along the line AA in FIG.

[0022] 5, the first elastic pieces 33 are provided at the four corners of the first side wall portion 32 which extends in a substantially rectangular shape. In other words, the first elastic pieces 33 are provided at four corners facing each other on the first side wall portion 32 which extends in a substantially rectangular shape.

[0023] 1 to 4, the first elastic piece 33 has an arm portion 331 and a tip portion 332. The arm portion 331 is connected to the first side wall portion 32 so as to be flexible in a direction intersecting the first direction A1, and extends in the circumferential direction of the first side wall portion 32. As shown in FIG. 5, the first side wall portion 32 has a first slit 321 and a second slit 322. The first slit 321 extends from the tip of the first side wall portion 32 in the first direction A1 toward the first flange portion 31. The second slit 322 is continuously formed in the circumferential direction along the first side wall portion 32 from the tip of the first slit 321 in the direction opposite to the first direction A1. The first elastic piece 33 is defined by the first slit 321 and the second slit 322.

[0024] 5 and 6, the tip portion 332 has a tapered portion 333. The tapered portion 333 is provided at the end portion of the tip portion 332 and is inclined toward the inside of the first side wall portion 32 as it extends in the first direction A1. As shown in FIG. 6, the outer surface of the tapered portion 333 is aligned with the inner surface 531 of the hole 53 of the mounting member 5.

[0025] 6, the tip portion 332 has a notch 334. The notch 334 has a shape in which a part of the base of the tip portion 332 is cut out. The notch 334 prevents the base of the tip portion 332 from contacting the second side wall portion 42 of the second member 4 when the first elastic piece 33 is bent. This will be described in detail later.

[0026] 5, the first engagement portions 34 are provided at four locations on opposing sides of the first side wall portion 32, which extends in a substantially rectangular shape. That is, the first engagement portions 34 are provided at two locations on opposing long sides and two locations on opposing short sides. The first engagement portions 34 also protrude inward from the inner surface of the first side wall portion 32.

[0027] As shown by the dashed double-dashed line in Figure 6, the arm portion 331A and the tip portion 332A of the first elastic piece 33A may extend outward from the first side wall portion 32 in a direction intersecting the first direction A1, rather than in the circumferential direction of the first side wall portion 32.

[0028] Next, the second member 4 of this embodiment will be further described with reference to the drawings. FIG. 7 is a perspective view of the second member of this embodiment as viewed from the second side wall portion side. FIG. 8 is a perspective view of the second member of this embodiment as viewed from the second flange portion side.

[0029] 7 and 8, the second flange portion 41 is formed in a substantially rectangular plate shape. The second elastic pieces 411 are provided at the four corners of the substantially rectangular second flange portion 41. In other words, the second elastic pieces 411 are provided at four corners of the substantially rectangular second flange portion 41 that face each other.

[0030] 8, the second elastic piece 411 is connected to a position set back in the second direction A2 (i.e., a position one step lower) from the outer surface 413 of the second flange portion 41. The second elastic piece 411 extends obliquely in the second direction A2 from the connected position.

[0031] Therefore, compared to when the second elastic piece 411 is connected flush to the outer surface 413 of the second flange portion 41, the second flange portion 41 can be made smaller while the inclination of the second elastic piece 411 relative to the outer surface 413 of the second flange portion 41 can be made gentler. This makes it easier to generate an elastic force (i.e., a biasing force) when the second elastic piece 411 abuts against the second surface 52 of the mounting member 5. Because the elastic force is easier to generate, stress concentration at the base portion (i.e., the connection portion) of the second elastic piece 411 can be suppressed. Furthermore, because the inclination of the second elastic piece 411 relative to the outer surface 413 of the second flange portion 41 is gentler, the tip portion of the second elastic piece 411 can contact the second surface 52 of the mounting member 5 over a wider area. This allows the second flange portion 41 to more stably contact the second surface 52 of the mounting member 5.

[0032] As shown in Fig. 7, the second side wall portion 42 has a generally rectangular shape with four corners recessed inward. The second engagement portions 44 are provided at four locations on opposing sides of the second side wall portion 42. That is, the second engagement portions 44 are provided at two locations on opposing long sides and two locations on opposing short sides. The second engagement portions 44 are provided at positions facing the first engagement portions 34 (see Fig. 5) when the first member 3 and the second member 4 are engaged with each other.

[0033] The second engagement portion 44 has an arm portion 441 and a protrusion portion 442. The arm portion 441 is connected to the second side wall portion 42 and is formed to be flexible in a direction intersecting (for example, a direction perpendicular to) the second direction A2. The protrusion portion 442 is formed to protrude outward from the outer surface of the arm portion 441.

[0034] When the first member 3 and the second member 4 engage with each other, the second side wall portion 42 of the second member 4 enters the interior of the first side wall portion 32 of the first member 3. As a result, the protrusion 442 of the second engagement portion 44 comes into contact with the first engagement portion 34. As the second side wall portion 42 enters further into the interior of the first side wall portion 32, the arm portion 441 of the second engagement portion 44 elastically deforms toward the inside of the second side wall portion 42, and the protrusion 442 of the second engagement portion 44 enters the interior of the first side wall portion 32 while contacting the first engagement portion 34. Then, when the protrusion 442 of the second engagement portion 44 climbs over the first engagement portion 34, the first engagement portion 34 and the second engagement portion 44 engage with each other.

[0035] At this time, as described above, the second elastic piece 411 of the second member 4 contacts the second surface 52 of the mounting member 5 while being bent in the first direction A1. Therefore, when the protrusion 442 of the second engagement portion 44 climbs over the first engagement portion 34, the bottom surfaces of the first engagement portion 34 and the second engagement portion 44 come into contact with each other with greater force. This allows the first engagement portion 34 and the second engagement portion 44 to engage with each other more firmly, regardless of the thickness of the mounting member 5.

[0036] As shown in FIG. 7 , accommodation portions 45 are provided at the four corners of the substantially rectangular second side wall portion 42. The accommodation portion 45 of this embodiment is an example of the “recess” of the present invention. The accommodation portion 45 has a shape in which the second side wall portion 42 is recessed inward. That is, the accommodation portion 45 has a shape in which the second side wall portion 42 is recessed toward the center portion 412 of the second flange portion 41. The accommodation portion 45 is provided at a position facing the first elastic piece 33 when the first side wall portion 32 and the second side wall portion 42 are engaged with each other, and is formed to be able to accommodate the first elastic piece 33 when the first elastic piece 33 is in a deflected state. As a result, the accommodation portion 45 prevents the first elastic piece 33 from contacting the second side wall portion 42 when the first elastic piece 33 is deflected. This will be described in detail later.

[0037] Next, a state in which the first member 3 of this embodiment is held by the mounting member 5 and a state in which the first member 3 and the second member 4 of this embodiment are engaged with each other will be further described with reference to the drawings. FIG. 9 is a cross-sectional view illustrating a state in which the first member of this embodiment is held by the mounting member. FIG. 10 is a cross-sectional view showing a state in which the first member and the second member of this embodiment are engaged with each other. 9 and 10 are cross-sectional views taken along the cutting plane BB shown in FIGS. 3 and 4. FIG.

[0038] For example, if there is variation in the diameter of the hole 53 in the mounting member 5, the fastener 23 may move relative to the mounting member 5, causing the fastener 23 to come off the mounting member 5.

[0039] In contrast, in the fastener 2 according to this embodiment, when the first member 3 is inserted into the hole 53 of the mounting member 5, the first elastic piece 33 bends as shown by arrows A5, A6, A7, and A8 in Fig. 9. Then, the tip portion 332 of the first elastic piece 33 abuts against the inner surface 531 of the hole 53 in the mounting member 5. In other words, the tip portion 332 of the first elastic piece 33 does not pass through the hole 53 in the mounting member 5 and engage with the edge of the hole 53 in the mounting member 5, but is disposed inside the hole 53 and abuts against the inner surface 531 of the hole 53. In this way, the first member 3 is held by the mounting member 5, as shown in Fig. 9.

[0040] With the first member 3 held by the mounting member 5, the second member 4 is inserted into the hole 53 of the mounting member 5. This causes the second side wall 42 to be inserted into the first side wall 32. The second engagement portion 44 provided on the second side wall 42 then engages with the first engagement portion 34 provided on the first side wall 32. The engagement between the first engagement portion 34 and the second engagement portion 44 is as described above with reference to FIGS. 7 and 8.

[0041] 7 and 8, accommodation portions 45 are provided at the four corners of the substantially rectangular second side wall portion 42, i.e., at positions facing the first elastic pieces 33. The accommodation portions 45 are formed to be able to accommodate the first elastic pieces 33 when the first elastic pieces 33 are in a bent state. Therefore, as shown in FIG. 10, even when the second side wall portion 42 is inserted into the first side wall portion 32 when the first elastic pieces 33 are in a bent state, the accommodation portions 45 can prevent the first elastic pieces 33 from coming into contact with the second side wall portion 42.

[0042] 5 and 6, the first elastic piece 33 has the notch 334. Therefore, even if the second side wall portion 42 is inserted into the first side wall portion 32 with the first elastic piece 33 bent, as shown in FIG.

[0043] As described above, according to the fastener 2 of this embodiment, the tip portion 332 of the first elastic piece 33 does not engage with the edge of the hole 53 of the mounting member 5, but rather the tip portion 332 of the first elastic piece 33 abuts against the inner surface 531 of the hole 53 of the mounting member 5 when the first elastic piece 33 is in a deflected state, thereby holding the first member 3 to the mounting member 5. Then, the second member 4 is inserted into the hole 53 of the mounting member 5, and the second side wall portion 42 of the second member 4 engages with the first side wall portion 32 of the first member 3 held by the mounting member 5. Therefore, even if there is variation in the diameter of the hole 53 of the mounting member 5, it is possible to prevent the first member 3 from moving relative to the mounting member 5. This prevents the fastener 2 of this embodiment from coming off the mounting member 5.

[0044] Furthermore, even if the mounting member 5 has a laminated structure of multiple plate materials and the positions of the holes formed in the plate materials do not match, the tip end 332 of the first elastic piece 33 comes into contact with the inner surface 531 of the hole 53 in the mounting member 5 when the first elastic piece 33 is in a deflected state, thereby holding the first member 3 to the mounting member 5. This makes it possible to prevent the first member 3 from moving relative to the mounting member 5. As a result, even if the mounting member 5 has a laminated structure of multiple plate materials, it is possible to prevent the fastener 2 according to this embodiment from coming off the mounting member 5.

[0045] Furthermore, the first elastic pieces 33 are provided at the four corners of the first side wall portion 32, which extends in a substantially rectangular shape. Therefore, the first elastic pieces 33 can prevent the first member 3 from moving relative to the mounting member 5 in any direction intersecting (for example, perpendicular to) the first direction A1. This makes it possible to more reliably prevent the fastener 2 according to this embodiment from coming off the mounting member 5.

[0046] Furthermore, the first elastic piece 33 is flexibly connected to the first side wall portion 32 or the first flange portion 31, and extends in the circumferential direction of the first side wall portion 32. Therefore, the first elastic piece 33 can have a longer overall length than if the first elastic piece 33 extended in the first direction A1. This prevents the bending rigidity of the first elastic piece 33 from becoming excessively high, and ensures an appropriate amount of deflection.

[0047] The first elastic piece 33 is defined by a first slit 321 extending from the tip of the first side wall portion 32 in the first direction A1 toward the first flange portion 31, and a second slit 322 continuously formed in the circumferential direction along the first side wall portion 32 from the tip of the first slit 321 in the direction opposite to the first direction A1. This makes it possible to keep the height of the first side wall portion 32 protruding from the first flange portion 31 in the first direction A1 low. This allows the first member 3 to be made smaller.

[0048] Furthermore, the outer surface of the tapered portion 333 provided at the tip end 332 of the first elastic piece 33 follows the inner surface 531 of the hole 53 in the mounting member 5. This reduces resistance when the first member 3 is inserted into the hole 53 in the mounting member 5. Furthermore, because the outer surface of the tapered portion 333 can come into surface contact with the inner surface 531 of the hole 53 in the mounting member 5, even if there is variation in the diameter of the hole 53 in the mounting member 5, it is possible to further prevent the first member 3 from moving relative to the mounting member 5. This further reduces the fastener 2 according to this embodiment from coming off the mounting member 5.

[0049] Furthermore, the second elastic piece 411 abuts against the second surface 52 of the mounting member 5 while being bent in the first direction A1. Therefore, the first engagement portion 34 and the second engagement portion 44 engage with each other more firmly, regardless of the thickness of the mounting member 5. Even if the mounting member 5 has a laminated structure of multiple plate materials and the plate materials are peeled away from each other, the first engagement portion 34 and the second engagement portion 44 can maintain their engagement with each other. This further prevents the fastener 2 according to this embodiment from coming off the mounting member 5.

[0050] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims. The configurations of the above embodiments can be partially omitted or arbitrarily combined in a different manner from the above. [Explanation of symbols]

[0051] 2: fastener, 3: first member, 4: second member, 5: mounting member, 23: fastener, 31: first flange portion, 32: first side wall portion, 33: first elastic piece, 33A: first elastic piece, 34: first engagement portion, 41: second flange portion, 42: second side wall portion, 44: second engagement portion, 45: storage portion, 51: first surface, 52: second surface, 53: hole, 311: arm portion, 312: central portion, 321: first slit, 322: second slit, 331: arm portion, 331A: arm portion, 332: tip portion, 332A: tip portion, 333: tapered portion, 334: notch portion, 411: second elastic piece, 412: central portion, 413: outer surface, 441: arm portion, 442: protrusion portion, 531: inner surface

Claims

1. A fastener attached to a mounting member and closing a hole formed in the mounting member, a first member inserted into the hole in a first direction from a first surface of the mounting member toward a second surface opposite the first surface and held by the mounting member; a second member inserted into the hole in a second direction from the second surface toward the first surface and engaging with the first member; Equipped with The first member is a first flange portion that abuts against the first surface; a first sidewall portion that protrudes from the first flange portion in the first direction and is inserted into the hole; an elastic piece flexibly connected to the first side wall portion or the first flange portion; and The second member is a second flange portion abutting the second surface; a second sidewall portion that protrudes from the second flange portion in the second direction and is inserted into the hole to engage with the first sidewall portion; and The fastener is characterized in that the first member is held by the mounting member by the tip of the elastic piece abutting against the inner surface of the hole when the elastic piece is in a bent state.

2. the first side wall portion is provided around a central portion of the first flange portion, The fastener according to claim 1 , wherein the elastic piece extends in a circumferential direction of the first side wall portion.

3. The fastener according to claim 2, characterized in that the elastic piece is defined by a first slit extending from the tip of the first side wall portion toward the first flange portion, and a second slit formed continuously in the circumferential direction from the tip of the first slit along the first side wall portion.

4. the second sidewall portion has a recess, 2. The fastener according to claim 1, wherein the recess is formed so as to be able to accommodate the elastic piece when the elastic piece is in a bent state.

5. the tip portion has a tapered portion that is inclined toward the inside of the first side wall portion as it extends in the first direction, The fastener according to claim 2 , wherein the tapered portion has an outer surface that conforms to the inner surface of the hole.

Images