JP5172758B2 - Fastener - Google Patents

Description

  In the present invention, components (attachment members) to be attached to the inside of an automobile or an electric device are fastened to a panel (attachment member) such as a body or an apparatus main body, or another panel (attachment member) is attached to the panel (attachment member). The present invention relates to a fastener used when fastening an attachment member.

A conventional fastener is composed of a base, an engaging portion provided continuously on one side (lower surface) side of the base, and a head provided continuously on an end opposite to the base of the engaging portion. ing.
The engaging portion has a bulging portion that is connected to the base portion with a predetermined interval in the circumferential direction, and has a bulging portion having a size exceeding the diameter of the locking hole of the attached member on the outer periphery in the middle of the axial direction. A plurality of elastic engagement legs that can be elastically reduced in diameter in the radial direction and the outermost side, and the diameter of the virtual axis centering on the center of the plurality of elastic engagement legs is It consists of struts with a diameter less than that.
The head has a conical shape pointed downward, and a plurality of elastic engagement legs and support columns are connected to the upper side (upper surface) of the conical shape (see Patent Document 1, Patent Document 2, and Patent Document 3). ).

When the fastener is pushed into the locking hole provided in the panel (attached member) with the head as a guide and the engaging portion (a plurality of elastic engaging legs) is pushed from the lower end side, the plurality of elastic engaging legs are bulged. Since the plurality of elastic engagement legs are reduced in diameter by being pushed at the edge of the locking hole via the, the plurality of elastic engagement legs (engagement) until the base comes into contact (pressure contact) with the other side surface (surface) of the panel. Can be pushed into the locking hole.
Then, when the elastic engagement legs are pushed into the locking holes until the base portion is in contact with one side surface (surface) of the panel, the plurality of elastic engagement legs try to expand the diameter to the original state by their own elasticity. The upper end portion of the bulging portion provided on the panel is pressed against one side surface (back surface) of the panel or one side surface (back surface) side edge of the locking hole, thereby holding the panel between the base portion and the plurality of bulging portions. So the fastener can be attached to the panel.

JP 2001-182725 A JP 2001-355619 A JP 2002-155915 A

The conventional fastener is provided with a head to align the center of the engaging portion with the center of the locking hole of the panel, but this head is connected to a plurality of elastic engaging legs and columns. If there is a pitch deviation between the locking hole of the panel (attached member) and the mounting hole of the panel (attaching member) attached to this panel, the head will be displaced according to the pitch deviation of the locking hole. The insertion force (push-in force) increases.
When the insertion force into the locking hole of the head exceeds a predetermined value (connection force between the head and the plurality of elastic engagement legs and support columns), the connection between the head and the plurality of elastic engagement legs or support columns is performed. There was a possibility that the part might be damaged.

  The present invention has been made in order to eliminate the above-described disadvantages. An air gap is provided between the head and the elastic engagement leg, so that the elastic engagement leg or It is intended to provide a fastener capable of preventing the supporting column portion from being damaged and suppressing the insertion force (pushing force) low. Moreover, the fastener which can prevent the increase in insertion force is provided by adjusting the flexibility of the elastic engagement leg by which the length dimension was shortened by providing a space | gap. Furthermore, the distance from the bulging part of several elastic engagement legs and the head front-end | tip is varied, and the elastic engagement legs deform | transform in order and the fastener which can reduce insertion force is provided.

The present invention has the following contents.
(1) The engagement portion that has a base portion and an engagement portion that is connected to the base portion, and that is pushed into a locking hole of the attached member and engages with one side surface of the attached member; In the fastener that clamps the mounted member with the base that is in contact with the other side surface of the mounted member, the engaging portion is provided with a predetermined interval in the circumferential direction, and an outer periphery in the middle of the axial direction. A plurality of elastic engaging legs having a bulging portion having a size exceeding the diameter of the locking hole and capable of elastically reducing the diameter in the radial direction, and the diameter of the imaginary shaft connecting the outermost side is the locking hole And a center of the engaging hole and a center of the engaging portion when the engaging portion is pushed into the engaging hole at an end opposite to the base portion of the supporting post. If is shifted, the engagement on the edge of the stop holes provided in contact with the head, the head end of said plurality of elastic engagement leg and is connected to the strut To the head portion, characterized by providing a gap between the connecting portion between the end and the support of the head side of the plurality of elastic engagement leg.
(2) The fastener according to (1), wherein the head is formed integrally with the support column.
(3) The fastener according to (1) or (2), wherein the plurality of elastic engagement legs are extended from a support column .

According to the present invention, when the center of the engagement hole is shifted from the center of the engagement portion when the engagement portion is pushed into the engagement hole of the attached member at the end opposite to the base portion of the support column, Since a head that abuts the edge of the locking hole is provided, and a gap is provided between the head and the plurality of elastic engagement legs, the head and the engagement can be made without damaging the elastic engagement legs or the column. The insertion force (push-in force) into the locking hole of the part can be kept low.
In addition, since the insertion force of the head and the engagement portion into the locking hole can be kept low, an unnecessary stress (load) does not act on the connecting portion between the support and the head, and the support and the head. It is possible to prevent the connecting portion from being damaged.
Since the head-side ends of the plurality of elastic engagement legs are connected to the support column, the diameter reduction range of the plurality of elastic engagement legs can be sufficiently secured, so that the locking holes of the plurality of elastic engagement legs can be secured. The insertion force into the inside can be further reduced.
Further, by providing a gap between the head and the elastic engagement leg, it is possible to prevent an increase in insertion force by adjusting the flexibility of the elastic engagement leg whose length is shortened.

FIG. 1 is a perspective view of a fastener according to a first embodiment of the present invention. FIG. 2 is a front view of the fastener shown in FIG. FIG. 3 is a rear view of the fastener shown in FIG. 4 is a plan view of the fastener shown in FIG. FIG. 5 is a bottom view of the fastener shown in FIG. FIG. 6 is a right side view of the fastener shown in FIG. 7 is a cross-sectional view taken along line AA in FIG. 8 is a cross-sectional view taken along line BB in FIG. FIG. 9 is a cut end view taken along the line CC of FIG. FIG. 10 is an explanatory view showing one usage state of the fastener according to the embodiment of the present invention. FIG. 11 is a perspective view of a fastener according to a second embodiment of the present invention. FIG. 12 is a front view of the fastener. FIG. 13 is a bottom view of the fastener. FIG. 14 is a right side view of the fastener. FIG. 15 is a longitudinal sectional view of the fastener. 16 is a cross-sectional view taken along line DD of FIG. 17 is a cross-sectional view taken along line EE in FIG. FIG. 18 is an explanatory view showing a usage state of the fastener according to the second embodiment of the present invention. FIG. 19 is a perspective view of a fastener according to a third embodiment of the present invention. FIG. 20 is a front view of a fastener according to a third embodiment of the present invention. FIG. 21 is a bottom view of the fastener. FIG. 22 is a half sectional view of the right side surface of the fastener. 23 is a cross-sectional view taken along line HH in FIG. 24 is a cross-sectional view taken along line GG in FIG.

  According to the present invention, a head is provided at the tip of the fastener, a gap is provided between the head and the elastic engagement leg, and the elastic engagement leg and the column part are damaged even if there is a pitch shift or a burr in the locking hole. And the insertion force can be kept low. Further, by providing the gap, it is possible to prevent an increase in insertion force by adjusting the flexibility of the elastic engagement leg whose length is shortened.

1 is a perspective view of a fastener according to an embodiment of the present invention, FIG. 2 is a front view of the fastener shown in FIG. 1, FIG. 3 is a rear view of the fastener shown in FIG. 2, and FIG. 2 is a plan view of the fastener shown in FIG. 2, FIG. 5 is a bottom view of the fastener shown in FIG. 2, FIG. 6 is a right side view of the fastener shown in FIG. 8 is a sectional view taken along line BB in FIG. 2, and FIG. 9 is a sectional end view taken along line CC in FIG.
The left side view of the fastener shown in FIG. 2 is left-right symmetric with the right side view of FIG.
And in FIG. 8, in order to make an elastic leg and a bulging part in an elastic engagement leg easy to understand, the line (dotted line) which divides both is written.

  In FIG. 1, the fastener 1 made of synthetic resin includes a base portion 11, an engaging portion 21 provided continuously (extending) on the lower surface of the base portion 11 so as to be orthogonal to the base portion 11, and the engaging portion 21. And a head portion 31 formed integrally with an end (lower end) opposite to the base 11 of the support column 25.

  As shown in FIGS. 1 to 4, the above-described base portion 11 is connected (suspended) to the upper side flange 12 having a predetermined outer diameter and a circular shape in plan view, and to the center of the lower side of the upper side flange 12, A neck portion 13 (see also FIG. 9) having a smaller diameter than the outer diameter of the upper collar 12 and provided with four concave portions 13 a on the outer side at equal intervals in the circumferential direction, and a neck portion 13 on the outer periphery of the lower end of the neck portion 13. The lower ridge 14 (see FIG. 4) is arranged in a circle in plan view with a larger diameter than the upper ridge 12 and rises from the inner periphery (inner side) to the outer periphery (outer side) toward the upper ridge 12 side. 7), and the lower side of the lower side of the lower side of the lower side of the lower side of the side of the lower side of the ridge 14 is a circle in plan view having a larger diameter than the side of the lower side of the side of the side of the lower side. It is comprised by the elastic seal | sticker part 15 (refer also FIG. 7) made into the conical surface descend | falling toward an outer periphery (outside).

Next, as shown in FIG. 1 to FIG. 3 and FIG. 8, the engaging portion 21 is provided at a predetermined position in the circumferential direction around the center of the lower rod 14 on the lower side of the lower rod 14 (base portion 11). A plurality of, for example, four (eg, vertically), equidistantly spaced, elastic engagement legs 22 having a fan-shaped horizontal cross-sectional shape that can be elastically reduced in the radial direction, and a lower flange 14 (base portion) 11) Four projecting pieces 27 that are connected (suspended) at the lower center and extend radially from the central column 26 at equal intervals in the circumferential direction are located between the elastic engagement legs 22, respectively. The cross-sectional column 25 has a cross-sectional shape in which the diameter of the virtual axis connecting the outermost (outermost) edges is less than the diameter of the locking hole 52 provided in the panel 51 described later.
As shown in FIG. 8, the elastic engagement legs 22 have predetermined equal intervals in the circumferential direction below the lower rod 14 (base portion 11) and centered on the center of the lower rod 14. A horizontal cross-sectional shape that is continuously provided (hangs down) and can be elastically reduced in the radial direction is provided on the outer periphery in the axial direction of the elastic leg 23 and the elastic leg 23 in the axial direction (connected). (See also FIG. 6), and is configured with a bulging portion 24 (see also FIG. 5) having a size exceeding the diameter of the locking hole 52 provided in the panel 51 and capable of elastically reducing the diameter in the radial direction. ing.
Note that the end (lower end) of each elastic engagement leg 22 on the head 31 side is connected to the projecting piece 27 (the column 25) as shown in FIGS. 1 to 3 and FIG.

Next, as shown in FIGS. 1 to 3 and FIGS. 5 to 7, the head portion 31 has a conical shape that is pointed downward, and the support column 25 is connected to the upper side (upper surface) of the conical shape.
Thus, even if the head 31 is displaced between the plurality of elastic engagement legs 22 and the head 31, for example, with respect to the support 25 by connecting the head 31 to the lower end of the support 25. A gap 28 (see FIGS. 2, 3, and 6) is provided so that the head 31 does not collide with each elastic engagement leg 22.

  FIG. 10 is an explanatory view showing one use state of the fastener 1 according to one embodiment of the present invention.

In FIG. 10, the panel 51 as the attached member is provided with a locking hole 52 for engaging the fastener 1.
The diameter of the locking hole 52 is the diameter formed by the outermost side (outermost edge) of the four elastic legs 23, the diameter formed by the outermost side (outermost edge) of the four projecting pieces 27, and the maximum of the head 31. The diameter is slightly larger than the diameter, and is slightly smaller than the diameter formed by the outermost (outermost edges) of the four bulging portions 24.
The attachment panel 61 as the attachment member is provided with a key hole 62 as an attachment hole for attachment to the fastener 1.
This key hole 62 has a circular shape with a diameter larger than that of the upper side collar 12 and a smaller diameter than that of the lower side collar 14, and continues to the insertion hole 63, slightly larger in diameter than the neck 13, The engagement hole 64 has an elliptical shape with a smaller diameter than the flange 12.

Next, when the attachment panel 61 is attached to the panel 51 using the fastener 1, the pitch of the locking holes 52 provided in the panel 51 and the pitch of the key holes 62 provided in the attachment panel 61 are not shifted ( A case where they match) will be described.
First, the upper collar 12 of the fastener 1 is inserted into the insertion hole 63 of the key hole 62 provided in the mounting panel 61 to bring the lower collar 14 into contact with the back surface of the mounting panel 61 and the neck 13 is inserted into the insertion hole. After being positioned within 63, the fastener 1 is moved relative to the mounting panel 61 to move the neck 13 into the engagement hole 64, and the neck 13 is brought into contact with the inner edge of the engagement hole 64. Let
Then, when the lower end of the head portion 31 is directed toward the panel 51 and the head portion 31 is pushed (press-fitted) into the engagement hole 52 from the lower end side, the bulging portions 24 of the four elastic engagement legs 22 are engaged with the engagement holes 52. The four elastic engagement legs 22 (the four elastic legs 23 and the four bulging portions 24) are reduced in diameter by being pushed by the edges of the elastic seal portions 15, so that the elastic seal portion 15 comes into contact (pressure contact) with the surface of the panel 51. The engaging portion 21 can be pushed into the locking hole 52 until the state.

Thus, when the engaging portion 21 is pushed into the locking hole 52 until the elastic seal portion 15 contacts the surface of the panel 51, the four elastic engaging legs 22 will expand to the original state due to their own elasticity. And the upper end portions of the four bulging portions 24 are in pressure contact with the rear side edge of the locking hole 52, so that the peripheral edge (base portion 11) of the elastic seal portion 15 and the four bulging portions 24 (engaging portions 21) Thus, as shown in FIG. 10, since the panel 51 is sandwiched, the fastener 1 can be engaged (attached) to the panel 51.
And the attachment panel 61 can be attached to the panel 51 by fixing a part of the attachment panel 61 to the panel 51 with an attachment screw, for example.

Next, when the attachment panel 61 is attached to the panel 51 using the fastener 1, the pitch of the locking holes 52 provided in the panel 51 is shifted from the pitch of the key holes 62 provided in the attachment panel 61 ( The case where they do not match will be described.
First, the upper collar 12 of the fastener 1 is inserted into the insertion hole 63 of the key hole 62 provided in the mounting panel 61 to bring the lower collar 14 into contact with the back surface of the mounting panel 61 and the neck 13 is inserted into the insertion hole. After being positioned within 63, the fastener 1 is moved relative to the mounting panel 61 to move the neck 13 into the engagement hole 64, and the neck 13 is brought into contact with the inner edge of the engagement hole 64. Let
And when the lower end of the head part 31 is directed to the panel 51 side and the head part 31 is pushed (press-fitted) into the locking hole 52 from the lower end side, the head part 31 has a conical shape pointed downward. Even if the center of the head 31 (and the engaging portion 21) is deviated from the center of the locking hole 52, the conical surface of the head 31 abuts against the edge of the locking hole 52, thereby The head portion 31 is guided and displaced so that the center of the (and engaging portion 21) coincides with the center of the locking hole 52.

Then, when the bulging portions 24 of the four elastic engagement legs 22 are pushed by the edges of the locking holes 52, the four elastic engagement legs 22 (four elastic legs 23 and four bulging portions 24) are reduced in diameter. Therefore, the engaging portion 21 can be inserted into the locking hole 52 until the elastic seal portion 15 is in contact (pressure contact) with the surface of the panel 51.
Thus, when the engaging portion 21 is pushed into the locking hole 52 until the elastic seal portion 15 contacts the surface of the panel 51, the four elastic engaging legs 22 will expand to the original state due to their own elasticity. And the upper end portions of the four bulging portions 24 are in pressure contact with the rear side edge of the locking hole 52, so that the peripheral edge (base portion 11) of the elastic seal portion 15 and the four bulging portions 24 (engaging portions 21) Thus, as shown in FIG. 10, since the panel 51 is sandwiched, the fastener 1 can be engaged (attached) to the panel 51.
And the attachment panel 61 can be attached to the panel 51 by fixing a part of the attachment panel 61 to the panel 51 with an attachment screw, for example.

As described above, according to the embodiment of the present invention, the engaging portion 21 is inserted into the locking hole 52 of the panel 51 (attached member) at the end (lower end) opposite to the base portion 11 of the support column 25. When the center of the locking hole 52 and the center of the engaging portion 21 are shifted when being pushed in, a head 31 that contacts the edge of the locking hole 52 is provided, and the head 31 and the plurality of elastic engagement legs 22 are provided. Since the gap 28 is provided between the elastic engagement leg 22 and the support portion 21, the elastic engagement leg 22 and the support portion are prevented from being damaged even if there is a pitch shift or burr in the engagement hole. The insertion force (push-in force) into the stop hole 52 can be kept low.
In addition, since the insertion force of the head portion 31 and the engaging portion 21 into the locking hole 52 can be kept low, stress (load) more than necessary does not act on the connecting portion between the support column 25 and the head portion 31. Thus, it is possible to prevent the connecting portion between the support column 25 and the head portion 31 from being damaged.
And since the end (lower end) by the side of the head 31 of the some elastic engagement leg 22 was connected to the support | pillar 25, since the diameter reduction range of the some elastic engagement leg 22 can fully be ensured, several The insertion force of the elastic engagement leg 22 into the locking hole 52 can be further reduced.

In the above-described embodiment, an example in which the number of the elastic engagement legs 22 and the protruding pieces 27 is four is shown. However, the number of the elastic engaging legs 22 and the protruding pieces 27 may be any number as long as there are two or more. However, the number is preferably 8 or less.
Moreover, although the example of the support | pillar 25 in which the protrusion 27 extended radially from the center pillar 26 was shown, the support | pillar may be one protrusion extended in the diameter direction.

  11 is a perspective view of a fastener according to a second embodiment of the present invention, FIG. 12 is a front view of the fastener of the present invention, FIG. 13 is a bottom view of the fastener, and FIG. FIG. 15 is a longitudinal sectional view of the fastener, FIG. 16 is a sectional view taken along the line DD of FIG. 12, and FIG. 17 is a sectional view taken along the line EE of FIG. Here, the same parts as those in the first embodiment will be described with the same numbers.

  The fastener 100 is integrated with the base portion 11, the engaging portion 21 connected (extended) so as to be orthogonal to the base portion 11 on the lower surface of the base portion 11, and the distal end (lower end) of the engaging portion 21. And a head 31 formed on the head.

  As shown in FIGS. 11 to 14, the base portion 11 is connected (suspended) to the upper side rod 12 having a predetermined outer diameter in a plan view and the lower side center of the upper side rod 12. The neck portion 13 is smaller than the outer diameter of the neck portion 12 and is provided with four concave portions 13a on the outer side at equal intervals in the circumferential direction. The neck portion 13 is continuously connected to the outer periphery of the lower end of the neck portion 13 around the neck portion 13. A lower ridge 14 having a circular shape in plan view larger in diameter than the ridge 12 and rising from the inner periphery (inner side) to the outer periphery (outer side) toward the upper ridge 12 side, and a lower side of the lower ridge 14 Continuing from the center of the lower rod 14, it has a circular shape in plan view with a larger diameter than the lower rod 14, and has a conical surface shape that descends from the inner circumference (inner side) to the outer circumference (outer side). It is comprised with the elastic seal | sticker part 15. FIG.

  As shown in FIGS. 11 to 17, the engaging portion 21 is connected (hangs down) to the center of the lower surface of the lower rod 14 (base portion 11), and extends radially from the central column 67 at equal intervals in the circumferential direction. Four projecting pieces 65a and 65b, elastic engagement legs 66 that are connected (hanging down) to the projecting pieces 65a and 65b and can be elastically reduced in the radial direction, and the outermost (outermost edge) of each projecting piece 65 ) Are formed with cross-shaped support columns 69 having a cross-sectional shape in which the diameter of the imaginary shaft is less than the diameter of the locking hole 52 provided in the panel 51 described later. The projecting piece 65a is formed in series from the lower end of the elastic seal portion 15 to the head portion 31, and the projecting piece 65b is divided at substantially the center.

  Each elastic engagement leg 66 has a predetermined equal interval in the circumferential direction around the center of the lower rod 14 below the lower rod 14 (base 11), as shown in FIGS. The horizontal cross-sectional shape that is continuously connected (hangs down) and can be elastically reduced in the radial direction has a fan shape, and is larger than the diameter of the locking hole 52 provided in the panel 51 and elastic in the radial direction. A bulging portion 68 that can be reduced in diameter, and extended from both ends of the bulging portion 68 and connected to the protruding pieces 65a and 65b so that the bulging portion 68 can be elastically reduced in diameter in the radial direction. It is comprised with the elastic leg 70 to support. Further, a restricting member (stopper) 71 for restricting the deformation amount (deflection amount) of the elastic engagement leg 66 in the diameter reducing direction is provided upright on the central column 67 side facing the elastic engagement leg 66. Therefore, it is possible to restrict the elastic engagement leg 66 from being bent more than necessary.

  As shown in FIGS. 11 to 15, the head portion 31 has a spindle shape that is pointed downward, and a column 69 is connected to the upper side (upper surface) of the spindle shape. In addition, since the gap 28 is provided between the plurality of elastic engagement legs 66 and the head 31, even if the head 31 is displaced with respect to the column 69, the head 31 directly contacts each elastic engagement leg 66. It is possible to prevent the elastic engagement leg 22 and the column portion from being damaged without colliding. Further, since the elastic engagement leg 66 is supported by the elastic leg 70 erected from the projecting pieces 65a and 65b, even if the length of the elastic engagement leg 66 is shortened by the presence of the gap 28, the flexibility is improved. Can be increased. Further, since the projecting piece 65b is divided into two in the longitudinal direction, the flexibility of the elastic engagement leg 66 can be further increased.

FIG. 18 is an explanatory view showing a usage state of the fastener according to the second embodiment of the present invention. In the present embodiment, a case will be described in which the pitch between the locking holes 52 provided in the panel 51 and the key holes 62 provided in the mounting panel 61 is shifted (not coincident). First, the fastener 100 is moved with respect to the mounting panel 61 to move the neck 13 into the engagement hole 64, and the neck 13 is brought into contact with the inner edge of the engagement hole 64.
Next, the lower end of the head portion 31 is directed toward the panel 51, and the head portion 31 is pushed into the locking hole 52 from the lower end side. Then, since the head portion 31 has a spindle shape with a downward point, even if the center of the head portion 31 (and the engaging portion 21) is shifted from the center of the locking hole 52, When the spindle surface comes into contact with the edge of the locking hole 52, the head 31 is guided and displaced so that the center of the head 31 (and the engaging portion 21) coincides with the center of the locking hole 52.

Then, when the bulging portions 24 of the four elastic engagement legs 66 are pushed by the edges of the locking holes 52, the four elastic engagement legs 66 (the four elastic legs 70 and the four bulging portions 68) are reduced in diameter. Therefore, the engaging portion 21 can be inserted into the locking hole 52 until the elastic seal portion 15 is in contact (pressure contact) with the surface of the panel 51.
As described above, when the engaging portion 21 is pushed into the locking hole 52 until the elastic seal portion 15 is in contact with the surface of the panel 51, the four elastic engaging legs 66 will expand to the original state by their own elasticity. When the upper end portions of the four bulging portions 68 are in pressure contact with the rear side edge of the locking hole 52, the peripheral edge (base portion 11) of the elastic seal portion 15 and the four bulging portions 68 (engaging portion 21) Thus, as shown in FIG. 18, since the panel 51 is sandwiched, the fastener 100 can be attached to the panel 51.

  Further, in the present embodiment, each elastic engagement leg 66 is configured to be supported from both ends by the elastic legs 70 connected to the projecting pieces 65a and 65b, so that the length dimension is shortened by the presence of the gap 28. Can also increase flexibility. Furthermore, since the projecting piece 65b is divided into two in the longitudinal direction, the flexibility of the elastic engagement leg 66 supported here can be further increased. Further, since the restricting members 71 for restricting the amount of deformation of the elastic engagement legs 66 in the diameter reducing direction are provided on the side of the central column 67 facing the elastic engagement legs 66, the elastic engagement legs 66 bend more than necessary. Can be regulated.

  In the above embodiment, a case has been described in which the protrusions 65a formed in series from the lower end of the elastic seal portion 15 to the head 31 and the protrusions 65b divided into two at the approximate center are alternately arranged. The projecting pieces may be divided into two parts. Moreover, you may form a thin part in some protruding pieces formed in series.

   19 is a perspective view of a fastener according to a third embodiment of the present invention, FIG. 20 is a front view of the fastener according to the third embodiment of the present invention, and FIG. 21 is a bottom view of the fastener according to the present invention. 22 is a half sectional view of the right side surface of the fastener of the present invention, FIG. 23 is a sectional view taken along the line H-H in FIG. 21, and FIG. 24 is a sectional view taken along the line GG in FIG. The same parts as those in the first embodiment will be described with the same numbers.

  The fastener 200 is integrated with the base portion 11, an engaging portion 21 that is continuously provided (extended) on the lower surface of the base portion 11 so as to be orthogonal to the base portion 11, and a distal end (lower end) of the engaging portion 21. And a head 201 formed on the head.

  As shown in FIGS. 19 to 23, the base 11 is connected (suspended) to the upper side rod 12 having a predetermined outer diameter in a plan view and the lower side center of the upper side rod 12. The neck portion 13 is smaller than the outer diameter of the neck portion 12 and is provided with four concave portions 13a on the outer side at equal intervals in the circumferential direction. The neck portion 13 is continuously connected to the outer periphery of the lower end of the neck portion 13 around the neck portion 13. A lower ridge 14 having a circular shape in plan view larger in diameter than the ridge 12 and rising from the inner periphery (inner side) to the outer periphery (outer side) toward the upper ridge 12 side, and a lower side of the lower ridge 14 Continuing from the center of the lower rod 14, it has a circular shape in plan view with a larger diameter than the lower rod 14, and has a conical surface shape that descends from the inner circumference (inner side) to the outer circumference (outer side). It is comprised with the elastic seal | sticker part 15. FIG.

  As shown in FIGS. 19 to 24, the engaging portion 21 is connected (suspended) to the center of the lower surface of the lower side collar 14 (base portion 11), and extends radially from the central column 67 at equal intervals in the circumferential direction. Four projecting pieces 65, elastic engagement legs 202 (202 a, 202 b, 202 c, 202 d) standing upright (hanging down) from the projecting pieces 65 and elastically reducing in the radial direction, A cross-sectional column 69 has a cross-sectional shape in which the diameter of a virtual axis connecting the outermost sides (outermost edges) is less than the diameter of a locking hole 52 provided in the panel 51 described later. The projecting pieces 65 are formed in a series from the lower end of the elastic seal portion 15 to the head 201. Further, as in the first embodiment, a gap 28 is provided between the head 201 and the elastic engagement leg 202. Further, as shown in FIG. 23, a gap 204 is formed between the elastic engagement leg 202 and the elastic seal portion 15, and a stepped portion 205 is provided in the vicinity of the portion of the bulging portion 203 facing the elastic seal portion 15. The stepped portion 205 is formed on the back side of the locking hole 52 so that the four elastic engagement legs 202 once inserted into the locking hole 52 and having a reduced diameter try to expand to the original state by their own elasticity. The panel 51 can be clamped by pressing against the edge.

  Each elastic engagement leg 202 (202a, 202b, 202c, 202d) is arranged around the center of the lower rod 14 below the lower rod 14 (base 11), as shown in FIGS. The horizontal cross-sectional shape that is erected (suspended) with a predetermined equal interval in the direction and elastically contracted in the radial direction has a fan shape, and the maximum diameter of the locking hole 52 provided in the panel 51 It has a bulging portion 203 (203a, 203b, 203c, 203d) that exceeds the diameter and can be elastically reduced in the radial direction. Also, as shown in FIG. 23, the distance between the height Ka of the bulging portion 203a of the elastic engagement leg 202a that exceeds the rear end height ha of the head 201 and the front end 201a of the head 201. La, a distance Lb between a portion Kb where the height of the bulging portion 203b of the elastic engagement leg 202b in the radial direction exceeds the rear end height hb of the head 201 and the tip 201a of the head 201, The distance Lc between the portion Kc where the height of the bulging portion 203c of the joint leg 202c exceeds the rear end height hc of the head 201 and the tip 201a of the head 201, and the bulging of the elastic engagement leg 202d A portion Kd whose height in the radial direction of the portion 203d exceeds the rear end height hd of the head 201 is different from a distance Ld to the tip 201a of the head 201. For example, in a case where La <Lb <Lc <Ld, the tip of the bulging portion 203 is applied in order along the circumferential direction, that is, spirally when inserted into the locking hole 52 provided in the panel 51. The insertion force of the contact can be reduced.

  Further, a distance Xa from the stepped portion 205 provided in the vicinity of the portion facing the elastic seal portion 15 of the bulging portion 203a to the portion Ka having a height exceeding the rear end height ha of the head 201, and the bulging The distance Xb from the step 205 of the portion 203b to the portion Kb having a height exceeding the rear end height hb of the head 201 and the rear end height hc of the head 201 from the step 205 of the bulging portion 203c The distance Xc to the portion Kc having a height exceeding the distance Xd is different from the distance Xd from the step portion 205 of the bulging portion 203d to the portion Kd having a height exceeding the rear end height hd of the head 201. For example, Xa> Xb> Xc> Xd. When configured in this manner, the time from when the tip of the bulging portion 203 comes into contact with the outer periphery of the locking hole 52 to the stepped portion 205 when inserted into the locking hole 52 provided in the panel 51 is different. The insertion force can be reduced.

  In the above embodiment, the distance L from the portion where the height of the bulging portion 203 of the elastic engagement leg 202 in the radial direction exceeds the rear end height h of the head 201 to the tip 201a of the head 201 is shown. Has been described as La <Lb <Lc <Ld, but may be configured as La = Lc <Lb = Ld or La = Lc> Lb = Ld. When configured in this way, the insertion force can be reduced because the tip of the bulging portion 203 alternately contacts each other at two places when inserted into the locking hole 52 provided in the panel 51.

  The present invention is not limited to the above-described embodiments, and various design changes can be made based on the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1,100,200 Fastener 11 Base 12 Upper side collar 13 Neck part 13a Recessed part 14 Lower side collar 15 Elastic seal part 21 Engaging part 22 Elastic engaging leg 23 Elastic leg 24 Swelling part 25 Column 26 Central column 27 Projection piece 28 Space | gap 31 head 51 panel (attachment member)
52 Locking hole 61 Mounting panel (Mounting member)
62 Keyhole (Mounting hole)
63 Insertion hole 64 Engagement hole 65a, b Projection piece 66 Elastic engagement leg 67 Central pillar 68 Swelling part 69 Post 70 Elastic leg 71 Restriction member 201 Head 202 Elastic engagement leg 203 Swelling part 204 Cavity 205 Step part

Claims (3)

A base, and an engaging portion connected to the base,
The attached member is sandwiched between the engaging portion that is pushed into the locking hole of the attached member and engages one side of the attached member and the base that contacts the other side of the attached member. In the fasteners,
The engaging portion is provided with a predetermined interval in the circumferential direction, and has a bulging portion having a size exceeding the diameter of the locking hole on the outer periphery in the axial direction, and elastically in the radial direction. A plurality of elastic engagement legs that can be reduced in diameter and a strut having a diameter of an imaginary shaft that is connected to the outermost side is smaller than the diameter of the locking hole,
If the center of the engaging hole is shifted from the center of the engaging portion when the engaging portion is pushed into the engaging hole at the end opposite to the base portion of the column, the engaging hole Provide a head that contacts the edge of
While connecting the head-side ends of the plurality of elastic engagement legs to the support column,
A gap is provided between the head and the connection portion between the end of the plurality of elastic engagement legs on the head side and the support column ,
A fastener characterized by that. The fastener according to claim 1,
The head is formed integrally with the support,
A fastener characterized by that. The fastener according to claim 1 or 2,
The plurality of elastic engagement legs are extended from the column ,
A fastener characterized by that.

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