JP2024042200A - Fasteners, fastening structures, and automotive interior accessories - Google Patents

Abstract

[Problem] Even if the force required to remove the fastener from the fastening object is set high, the force required to rotate the fastener and release the engagement with the fastening object does not become excessive. do it like this.
[Solution] The introduction of the body part 5 into the receiving part 19 formed in the fastening object 2 is allowed by elastic deformation of an elastic arm part 6, which becomes a part of the body part 5, toward the center of the body part 5. At the same time, due to the elastic return of the elastic arm portion 6 at the completion position of the introduction, a part of the elastic arm portion 6 is inserted into the engagement hole 20 formed in the side wall of the receiving portion 19, and the object to be fastened is inserted. This is a fastener 1 that is fastened to 2. The elastic arm portion 6 is formed along a direction that revolves around the central axis x1 of the body portion 5, and is formed in the engagement hole 20 between the base portion 6b and the free end 6a of the elastic arm portion 6. An engaging protrusion 15 to be engaged is formed.
[Selection diagram] Figure 13

Description

The present invention provides a fastener having a configuration that allows introduction into a receiving portion formed in a fastening object through elastic deformation, and is fastened to the fastening object by elastic return at a position where the introduction is completed. The present invention relates to a fastening structure including a fastening structure, and an automobile interior accessory.

Consisting of a grommet and a pin, the leg of the pin is allowed to be introduced into the grommet by elastic deformation of the claw provided on the leg, and the claw is elastically returned to the opening of the grommet when the introduction is completed. An example of a grommet in which the pin is inserted and fastened to the grommet is disclosed in Patent Document 1.

In the device disclosed in Patent Document 1, the claws are formed along the central axis of the pin, have a base at the tip of the pin, and have a free end at the head of the pin.

In Patent Document 1, when the pin is rotated from a state where the pin is fastened to a grommet, the side part of the claw contacts the opening edge of the opening, and the claw is elastically deformed inward and comes out of the opening. This releases the fastening state between the pin and the grommet.

Patent No. 4375695

In the device of Patent Document 1, the state of fastening between the pin and the grommet is improved by increasing the force required to remove the pin from the grommet. However, in the device of Patent Document 1, the greater the force required for such removal is set, the greater the resistance force when rotating the pin to release the fastening.

The main problem to be solved by this invention is that the fasteners of this type, the fastening structures including the fasteners, and the automobile interior accessories constructed using these fasteners are Even if the force required to remove the fastener from the receiving part of the fastener is set large, the force required to rotate the fastener to disengage it from the object to be fastened is not made excessive. , especially.

In order to achieve the above object, in the present invention, from a first aspect, the fastener has a head and a body, and the body is inserted into a receiving part formed on a fastening object. The introduction is allowed by elastic deformation of an elastic arm that becomes a part of the body toward the center of the body, and elastic return of the elastic arm at the completion position of the introduction causes the elastic arm to be inserted into the side wall of the receiving portion. A fastener that is fastened to the fastening target by inserting a part of the elastic arm into a formed engagement hole,
The elastic arm portion is formed along a direction that revolves around the central axis of the body portion, and has an engagement protrusion that is engaged with the engagement hole between the base and the free end of the elastic arm portion. A thing formed by forming a part.

Since the elastic arms are formed along the direction of going around the central axis of the torso, when the fastener is fastened to the object to be fastened, the elastic arms move the torso from the fastener to the receiving portion. When a force is applied in a direction to remove the fastener from the fastener, the elastic arm portion is difficult to deform toward the central axis, and the engagement protrusion is caught in the engagement hole, preventing the fastener from being removed.
On the other hand, when the fastener is fastened to the object to be fastened, when a torque is applied to the fastener in a direction such that the base of the elastic arm is on the rotation destination side with respect to the central axis, the engagement protrusion The elastic arm portion is likely to be elastically deformed in a direction closer to the central axis due to sliding contact between the elastic arm portion and the hole edge of the engagement hole. Thereby, the state in which the fastener is fastened to the fastening object can be easily released by a rotation operation with the base side of the elastic arm constituting the fastener as the rotation destination side.

Two or more elastic arm portions are formed in the body portion at intervals in the direction of rotation around the central axis, and the elastic arm portion is adjacent to one free end of the elastic arm portions that are adjacent to each other in the direction of rotation of the central axis. One aspect of the present invention is that the other bases of the arms are adjacent to each other.

Further, the body portion is provided with a regulating portion that comes into contact with the elastic arm portion and prevents elastic deformation of the elastic arm portion when a force is applied in a direction to remove the body portion from the receiving portion. is one of the embodiments of this invention.

Further, one aspect of the present invention is that the body portion has a bottom portion in which the elastic arm portion is positioned between the body portion and the head portion, and the bottom portion is provided with the restriction portion.

In one aspect of the invention, the engagement protrusion has a side inclined surface that gradually reduces the height of the engagement protrusion as it approaches the base side of the elastic arm.

Further, in one aspect of the present invention, the engaging protrusion includes a lower inclined surface that gradually reduces the height of the engaging protrusion as it moves away from the head.

Further, it is an aspect of the present invention that a string-like body is provided with a through hole extending between the head and the body.

Further, it is an aspect of the present invention that the head is provided with a knob.

Moreover, in order to achieve the above-mentioned problem, in this invention, from a second viewpoint, the fastening structure is
The fastening object comprises the fastener and the receiving part of the body of the fastener, and
The inner diameter of the receiving part is configured to gradually decrease as it approaches the inner part of the receiving part.

Moreover, in order to achieve the above-mentioned object, in this invention, from a third viewpoint, an automobile interior accessory is provided.
The fastening object comprises the fastener and the receiving part of the body of the fastener, and
The object to be fastened is a cylindrical body having the engaging hole in the side part of the cylinder between one end of the open cylinder and the other end of the cylinder which serve as the entrance of the receiving part.

According to this invention, even if the force required to remove the fastener from the receiving part of the fastening object is set large, the force required to rotate the fastener and release the engagement with the fastening object is not necessary. It is possible to prevent the force from being excessive, and to maintain a stable fastening state of the fastener, and to smoothly remove the fastener from the object to be fastened.

FIG. 1 is a perspective view of a fastener according to one embodiment of the present invention. FIG. 2 is a perspective view of the fastener, showing the fastener from a different orientation than in FIG. FIG. 3 is a plan view of the fastener. FIG. 4 is a bottom view of the fastener. FIG. 5 is a side view of the fastener. FIG. 6 is a side view of the fastener, showing the fastener from a different orientation than FIG. FIG. 7 is a cross-sectional configuration diagram taken along line AA in FIG. 3. FIG. 8 is a perspective view of a fastening object that constitutes a fastening structure together with the fastener. FIG. 9 is a plan view of the object to be fastened. FIG. 10 is a side view of the object to be fastened. FIG. 11 is a side view showing the situation when the fastener is introduced into the fastening object. FIG. 12 is a cross-sectional view of the essential parts in the state shown in FIG. FIG. 13 is a perspective view showing the state when the fastener is introduced into the fastening object to the completion position of the introduction. FIG. 14 is a side view of the state of FIG. FIG. 15 is a cross-sectional configuration diagram of main parts in the state shown in FIG. 13. FIG. 16 is a cross-sectional configuration diagram of main parts showing a situation when a force is applied to the fastener in a direction to remove the fastener from the fastening object from the state shown in FIG. 13. FIG. 17 is a side view showing the situation when the fastener is rotated from the state shown in FIG. 13 in a direction to release the fastening object. FIG. 18 is a plan view of the state shown in FIG. 17. FIG. 19 is a cross-sectional configuration diagram taken along line BB in FIG. 18. FIG. 20 is a perspective view of the fastening structure applied to an automobile interior accessory.

Hereinafter, typical embodiments of the present invention will be described based on FIGS. 1 to 20.

The fastener 1 according to this embodiment has a head portion 4 and a body portion 5, and a part of the body portion 5 is configured such that the body portion 5 is introduced into a receiving portion 19 formed in a fastening object 2. This is allowed by the elastic deformation of the elastic arm portion 6 toward the center side of the body portion 5 (toward the center axis x1, which will be described later), and the elastic return of the elastic arm portion 6 at the completion position of the introduction allows the receiving portion to be A part of the elastic arm part 6 is inserted into an engagement hole 20 formed in the side wall of the elastic arm part 19 to be fastened to the fastening object 2.

The provision of elastic deformation characteristics to the portions of the fastener 1 that should have this property can be easily achieved by forming the fastener 1 into a plastic molded product.

A fastening structure is constituted by the fastener 1 and the fastening object 2.

Further, the fastener 1 and the fastening object 2 constitute an automobile interior accessory.

In this embodiment, the object 2 to be fastened is an open cylinder end 21a serving as the entrance 19a of the receiving portion 19, a closed cylinder other end 21b, and the cylinder one end 21a and the cylinder other end 21b. The cylindrical body 21 includes a cylindrical side portion 21c formed between the cylindrical body 21 and the cylindrical side portion 21c. In this embodiment, the inside of the cylindrical body 21 serves as the receiving portion 19, and the cylindrical side portion 21c functions as the side wall of the receiving portion 19.

In the illustrated example, outer flanges 21d are formed on one end 21a and the other end 21b of the cylindrical body 21, respectively, in a circular shape that goes around the cylindrical axis x2 (see FIG. 10) of the cylindrical body 21. There is.

An engagement hole 20 that connects the inside and outside of the cylindrical body 21 is formed in the cylindrical side portion 21c between the two outer flanges 21d of the cylindrical body 21. In the illustrated example, two or more engagement holes 20 are provided with an interval between adjacent engagement holes 20 in the direction surrounding the cylindrical axis x2 of the cylindrical body 21, and in the illustrated example, 90 in the illustrated example. There are four formed at intervals of degrees.

In the illustrated example, each of the four engagement holes 20 is configured to have substantially the same size and shape as the other engagement holes 20. In the illustrated example, the engagement hole 20 has a substantially rectangular window shape. The engagement hole 20 is formed to have a hole edge 20a along the cylinder axis x2 and a hole edge 20b perpendicular to the cylinder axis x2.

Further, the inner diameter of the receiving part 19 is configured to gradually decrease as it approaches the inner part of the receiving part 19, in the illustrated example, the other end 21b of the cylinder of the cylindrical body 21. In the illustrated example, the inside and outside of the cylindrical side portion 21c of the cylindrical body 21 are shaped along the arc of an imaginary circle, and the inner diameter of the cylindrical side portion 21c is wide at the one end 21a side of the cylinder. From there, it gradually decreases as it approaches the other end 21b of the cylinder (see FIG. 19).

The object 2 to be fastened may be one having the above-described receiving portion 19 and the engaging hole 20 in its side wall, and its specific structure may be changed as necessary. For example, the fastening target 2 may be the interior trim of a car, or the side of the car body.

In the illustrated example, the fastening object 2 further has a shaft-like body 22 that is integrated with the cylindrical body 21, and is connected to other objects 3, such as the automobile, via this shaft-like body 22. It is designed to be attached to the vehicle body side, etc. (see Figure 20).

In the illustrated example, the shaft-like body 22 has a bolt shape with a countersunk head 22a. The shaft-like body 22 has a large diameter portion 22b from the countersunk head 22a to a position midway in the length direction, and a small diameter portion 22c extends from the large diameter portion 22b. A male thread 22d is formed on the outer periphery of this narrow diameter portion 22c. The shaft-like body 22 has a countersunk head 22a built into the part constituting the other end 21b of the cylinder 21, and the parts below the countersunk head 22a protrude from the cylinder 21, so that the shaft-like body 22 is connected to the cylindrical body 21. It is integrated. The cylindrical axis x2 of the cylindrical body 21 and the central axis of the shaft-like body 22 are integrated so that they are located on the same imaginary straight line. At the same time, a hole 21e is formed in the center of the closed portion of the other end 21b of the cylinder 21, which is the innermost part of the receiving part 19, so that a part of the countersunk head 22a faces the receiving part 19. A countersunk head 22a located in the hole 21e is formed with a recess 22e into which the tip of the tool such as a screwdriver fits, having a shape complementary to that of the tip of a tool such as a screwdriver. In the illustrated example, the shaft-like body 22 and the cylindrical body 21 are integrated as described above by using the shaft-like body 22 as an insert in a mold for molding the cylindrical body 21. .

In the illustrated example, the fastening object 2 can be attached to another object 3 by screwing the shaft-like object 22 into the screw hole 23 of the other object 3 using the male screw 22d of the shaft-like object 22. It is designed to be equipped with 3.
FIG. 20 shows a state in which the fastening object 2 is attached to the side wall of the interior of an automobile as another object 3. In FIG. 20, reference numeral 24 indicates a side wall (trim), and reference numeral 25 indicates a body panel. The shaft-shaped body 22 is screwed into a screw hole 23 formed in a body panel 25 through a through hole formed in a side wall 24.

In the illustrated example, when the fastening object 2 is provided on a side wall 24 of the interior of a vehicle so that the cylindrical body 21 protrudes from the side wall 24, the handle of a shopping bag can be hooked on the cylindrical side portion 21c between the two outer flanges 21d, and it can be used as a hook, so to speak. In addition, when the fastening device 1 is removed, the fastening object 2 can be used by passing a string through the engagement hole 20 formed in the cylindrical side portion 21c, or by hooking a hanger hook on the engagement hole 20. In addition, when the fastening device 1 is removed, the fastening object 2 can be used to support a rod-shaped body by having the receiving portion 19 receive the end of the rod-shaped body in the interior of the vehicle.

The fastener 1 has a head 4 and a body 5 in the shape of a hollow shaft. In the illustrated example, the body 5 is attached to the receiving part 19 of the fastening object 2 with the tip 5a of the body 5 opposite to the connecting side with the head 4 first, and this tip 5a is placed at the back of the receiving part 19. It can be introduced to a position where it substantially hits the closed part of the other end of the cylindrical body 21 (FIG. 15/introduction completion position). At this complete introduction position, the trunk 5 enters into the receiving section 19 and the head 4 is positioned outside the receiving section 19.

In the illustrated example, the fastener 1 includes an inner cylinder part 7 and an outer cylinder part 8.

The inner cylindrical portion 7 has both ends open. One end 7a of the inner cylindrical portion 7 forms part of the head portion 4. The other end 7b of the inner cylindrical portion 7 forms part of the tip 5a of the body portion 5.

The inner diameter of the outer cylinder part 8 is larger than the outer diameter of the inner cylinder part 7. Further, the total length of the outer cylindrical portion 8 is made smaller than the total length of the inner cylindrical portion 7.

One end 8a of the outer tubular portion 8 located on the head 4 side is located closer to the tip 5a of the body 5 than one end 7a of the inner tubular portion 7, and one end 7a of the inner tubular portion 7 protrudes from one end 8a of the outer tubular portion 8 to form the head 4.
Further, the inner cylindrical portion 7 and the outer cylindrical portion 8 are integrated by a circumferential connecting portion 9 extending between the other end 7 b of the inner cylindrical portion 7 and the other end 8 b of the outer cylindrical portion 8 .
The inner tubular portion 7 and the outer tubular portion 8 are integrated so that a gap is formed between the outer surface of the inner tubular portion 7 and the inner surface of the outer tubular portion 8 at any position in the direction around the central axis x1 (see FIG. 5) of the body portion 5, i.e., the cylindrical axis of the inner tubular portion 7. The elastic arm portion 6 described below uses this gap to elastically deform in a direction approaching the central axis x1 described below. As a result, the fastener 1 has a circumferential opening portion 10 that communicates with the gap on the head 4 side. The fastener 1 also has a bottom portion 11 formed by the circumferential connecting portion 9 on the tip 5a side.

The elastic arm portion 6 is formed along a direction that revolves around the central axis x1 of the body portion 5.
In the illustrated example, the elastic arm portion 6 is formed on the outer cylinder portion 8 .
In the illustrated example, the elastic arm portions 6 are spaced apart from each other in the direction surrounding the central axis x1 of the body portion 5. Four engaging holes 20 are formed at 90 degree intervals in the direction, corresponding to the number and position of the engaging holes 20 .
In the illustrated example, each of the four elastic arms 6 is configured to have substantially the same size and shape as the other elastic arms 6.
In the illustrated example, the elastic arm portion 6 includes a pair of horizontally divided grooves 12 that extend along a direction that goes around the central axis x1, and a portion that extends along the central axis x1 between one end of the pair of horizontally divided grooves 12. It is constituted by a part of the outer cylindrical portion 8, which is divided by a vertically oriented groove 13 extending in the same direction.
One of the pair of horizontal grooves 12 is formed at substantially the same level as the inner surface of the bottom portion 11. The other of the pair of horizontally directed grooves 12 is formed at a position in the middle of the entire length of the inner cylindrical portion 7 .
The elastic arm portion 6 formed in this manner has a free end 6a located on the side of the vertically oriented groove 13, and the opposing position thereof is a base portion 6b (root).

Further, each of the two or more elastic arm portions 6 formed in this way has one free end 6a of one of the elastic arm portions 6 adjacent to each other in the direction surrounding the central axis x1, and the other of the elastic arm portions 6 adjacent to the free end 6a are formed so that the base portions 6b of the two are adjacent to each other.
That is, when the fastener 1 is rotated in one direction (for example, the direction of the arrow r1 in FIG. 1) about the central axis 6a, and the base 6b is positioned on the rear side of this rotation.

In the illustrated example, the groove end of the horizontal split groove 12 formed in the middle of the entire length of the inner cylinder part 7 is located on the base 6b side of the elastic arm part 6, and the groove end is located on the distal end side of the body part 5. Due to this bending point 14, the width of the base portion 6b side of the elastic arm portion 6 in the direction along the central axis x1 is made slightly smaller than that of the other portions. Thereby, the elastic arm portion 6 tends to undergo elastic deformation in a direction centering on the base portion 6b side and moving the free end 6a side closer to the central axis x1.

An engagement protrusion 15 that is engaged with the engagement hole 20 of the fastening object 2 is formed between the base 6b and the free end 6a of the elastic arm 6.
The engaging protrusion 15 is connected to an inner surface 6c (inner surface of the outer cylindrical portion 8) of the elastic arm 6 located on the central axis x1 side and an outer surface 6d (outer cylindrical portion) of the elastic arm 6 located back to back. 8).
In the illustrated example, the engagement protrusion 15 is located in a region between the free end 6a and a position that is approximately half of the entire length of the elastic arm 6 (the length between the base 6b and the free end 6a). is formed.

In the illustrated example, the engaging protrusion 15 includes a top portion 15a, a side inclined surface 15b, a lower inclined surface 15c, a side engaging surface 15d, and an upper engaging surface 15e.
A side inclined surface 15b is formed on the side of the base 6b of the elastic arm 6 with respect to the top portion 15a, and a side engaging surface 15d is formed at a position opposite to the side inclined surface 15b. In other words, the top portion 15a is positioned between the side inclined surface 15b and the side engaging surface 15d in the direction around the central axis x1. In the illustrated example, the side engagement surface 15d is continuous with the free end 6a of the elastic arm 6 and extends along an imaginary straight line y (see FIG. 3) that extends in the radial direction orthogonally to the central axis x1. It is a face.
A lower inclined surface 15c is formed on the bottom portion 11 side of the top portion 15a, and an upper engagement surface 15e is formed at a position opposite to the lower inclined surface 15c. That is, in the direction along the central axis x1, the top portion 15a is located between the upper engagement surface 15e and the lower inclined surface 15c.

The side inclined surface 15b is configured to gradually reduce the height of the engagement protrusion 15 as it approaches the base 6b side of the elastic arm 6.

Further, the lower inclined surface 15c is configured to gradually reduce the height of the engaging protrusion 15 as it moves away from the head 4.

The outer diameter of the body portion 5 is slightly larger than the inner diameter on the entrance 19a side or the back side of the receiving portion 19 of the fastening object 2 at the formation position of the top portion 15a of the engagement protrusion 15. The outer diameter of the body portion 5 is large enough to fit into the receiving portion 19 except at the position where the engaging protrusion 15 is formed.
Furthermore, when the body 5 is introduced into the receiving portion 19 to the completion position, the engagement protrusion 15 is positioned at a level that allows it to enter the engagement hole 20.

The introduction operation for introducing the body part 5 into the receiving part 19 involves sliding the engaging protrusion 15 into sliding contact with the inner surface of the side wall of the receiving part 19 and the accompanying elastic deformation of the elastic arm part 6 in a direction approaching the central axis x1. (See FIGS. 11 and 12). This insertion operation is performed smoothly by the lower inclined surface 15c. At this time, the elastic arm portion 6 receives the action of a force directed toward the front side of the insertion, and is elastically deformed on the regulating portion 16 (described later) in a direction approaching the central axis x1 without hitting the regulating portion 16. It has become.
When the body part 5 is introduced into the receiving part 19 to the completion position of the introduction, the elastic arm part 6 elastically returns when the engagement protrusion 15 is positioned inside the engagement hole 20 and closes the engagement hole. 20 (see FIGS. 13 to 15).
The body part 5 has been introduced into the receiving part 19 to the complete position of introduction, but when the body part 5 is introduced in a direction in which the engaging protrusion 15 is positioned between the adjacent engaging holes 20, the fastener 1 is inserted into the receiving part 19. The engagement protrusion 15 can be positioned inside the engagement hole 20 by slightly rotating the center axis x1 in a direction around the central axis The engaging protrusion 15 fits into the matching hole 20.
Thereby, the fastener 1 can be fastened to the fastening object 2 in a so-called one-touch manner.

Since the elastic arm portion 6 is formed along the direction that revolves around the central axis x1 of the body portion 5, the elastic arm portion 6 can move from the state where the fastener 1 is fastened to the fastening object 2 to the fastener 1. On the other hand, when a force is applied to remove the body part 5 from the receiving part 19, the elastic arm part 6 is difficult to deform in a direction approaching the central axis x1, and the engagement protrusion 15 is caught in the engagement hole 20. Removal of the fastener 1 is prevented.
On the other hand, from the state in which the fastener 1 is fastened to the fastening object 2, the direction r2 is such that the base 6b of the elastic arm 6 is on the rotation destination side with respect to the fastener 1 about the central axis x1 (see FIG. 1). When this torque is applied, the engagement protrusion 15 and the edge of the engagement hole 20 come into sliding contact, and the elastic arm 6 is likely to be elastically deformed in a direction closer to the central axis x1. As a result, the state in which the fastener 1 is fastened to the fastening object 2 can be easily released by a rotation operation with the base 6b side of the elastic arm 6 constituting the fastener 1 as the rotation target side. can.

More specifically, when the fastener 1 is fastened to the fastening object 2 in this way, when a force is applied to the fastener 1 in a direction to remove the body part 5 from the receiving part 19, the upper part The engagement surface 15e is caught in the engagement hole 20, preventing the fastener 1 from being removed (see FIG. 16).

In addition, from the state in which the fastener 1 is fastened to the fastening object 2 in this way, the fastener 1 is rotated in a direction r1 with the free end 6a of the elastic arm 6 being the rotation destination side about the central axis x1. When torque is applied, the side engagement surface 15d gets caught in the engagement hole 20 and rotation of the fastener 1 is prevented.

On the other hand, from the state in which the fastener 1 is fastened to the fastening object 2 in this way, a torque is applied to the fastener 1 in a direction r2 about the central axis x1 and with the base 6b of the elastic arm 6 as the rotation destination side. When this is applied, the side inclined surface 15b and the edge of the engagement hole 20 come into sliding contact, and the elastic arm portion 6 is elastically deformed in a direction toward the central axis x1 (see FIGS. 17 to 19). As a result, in this embodiment, when the fastener 1 is fastened to the fastening object 2, the base 6b side of the elastic arm 6 constituting this fastener 1 is the rotation destination side. It can be easily released by rotating.
In particular, in the illustrated example, since the inner diameter of the receiving portion 19 is configured to gradually decrease as it approaches the back of the receiving portion 19, the engaging protrusion 15 is removed from the engaging hole 20 by the rotational operation. When the engaging protrusion 15 comes into contact with the inner surface of the receiving part 19 outside the engaging hole 20 after being pulled out, the elastic force of the elastic arm part 6 acts on the body part 5 as a force in the direction of pulling it out from the receiving part 19. The body 5 is pushed out from the receiving part 19 and smoothly comes out.
Note that the rotation operation with respect to the fastener 1 with the base 6b side of the elastic arm portion 6 being the rotation destination side can also be performed continuously by repeating elastic deformation and elastic return of each elastic arm portion 6 (so to speak, idling). ), the fastener 1 will not be damaged by rotation in this direction.

Further, in this embodiment, when a force is applied to the body section 5 in a direction to remove the body section 5 from the receiving section 19, the elastic arm section 6 comes into contact with the elastic arm section 6. A regulating portion 16 is provided to prevent elastic deformation of the material.
In this embodiment, a regulating portion 16 that extends over the bottom portion 11 is provided.

When the force in the pulling direction is applied to the body 5, the upper engaging surface 15e gets caught in the engagement hole 20 as described above, but this catching causes the elastic arm 6 to A force is applied to deform it in a direction closer to the central axis x1. In this embodiment, when such a force is applied, the thick surface 6e of the elastic arm 6 on the bottom 11 side hits the bottom 11, and the inner surface 6c of the elastic arm 6 at the bottom 11 A protruding regulating portion 16 provided at a position close to the center axis x1 abuts against the inner surface 6c of the elastic arm portion 6 to prevent deformation of the elastic arm portion 6 in a direction approaching the center axis x1. (See Figure 16). Thereby, the fastening state of the fastener 1 is stabilized by making it possible to easily unfasten the fastener 1 by the rotational operation and to set a large resistance force against the above-mentioned removal.

Further, in the illustrated example, the fastener 1 is provided with a through hole 17 for the string-like body W extending between the head portion 4 and the body portion 5.
In the illustrated example, an inner flange 7c is formed at one end 7a of the inner cylindrical portion 7 constituting the head 4. The through hole 17 is formed between the inner flange 7c and the other end 7b of the inner cylindrical portion 7 constituting the body portion 5.
Accordingly, in the illustrated example, after passing the string-like body W through the through-hole 17 from the one end side, a knot Wa is made at the end thereof, so that the knot Wa is caught on the inner flange 7c within the inner cylinder portion 7. This makes it possible to rationally provide the fastener 1 at the end of the string-like body W (see FIG. 7). By fastening the fastener 1 linked to the string-like body W in this way to the fastening object 2, the string-like body W can be linked to the fastening object 2 via the fastener 1 (Fig. 20).

Further, in the illustrated example, the fastener 1 includes a knob portion 18 on the head 4.
The knob portion 18 is mainly constituted by a plate piece 18a protruding from the side of the inner tube portion 7 in a direction perpendicular to the central axis x1, on the one end 7a side of the inner tube portion 7. The plate piece 18a is formed so that its plate surface is aligned with the central axis x1. Further, the plate pieces 18a are formed on both sides of the inner cylinder portion 7 in the diametrical direction. Moreover, the protruding end 18b of the plate piece 18a is located outward from the side of the outer cylinder part 8, and the plate piece 18a and the outer cylinder part 8 are integrated in the forming range of the plate piece 18a.
As a result, in the illustrated example, the fastener 1 can be fastened to the fastening object 2 using the knob 18, and the torque in the direction of unfastening this fastening (centered on the central axis x1) A torque (torque) in the direction r2 can be applied to the fastener 1 with the base 6b of the elastic arm 6 facing toward the rotation destination.
Further, from the state in which the fastener 1 is fastened to the fastening object 2, using the knob 18, a torque in the direction opposite to the direction of unfastening the fastening object (the elastic arm centered on the central axis x1) is applied. A torque (in a direction r1 with the free end 6a of the portion 6 on the rotation destination side) can be applied to the fastener 1, and in this case, the object to be fastened 2 can be made to rotate together. In the illustrated example, by this co-rotation, the male screw 22d of the shaft-shaped body 22 is unscrewed, and the object 2 to be fastened with the fastener 1, for example, from the side wall side of the interior of the car, that is, the car It is also possible to remove interior accessories.

Note that, as a matter of course, the present invention is not limited to the embodiments described above, but includes all embodiments that can achieve the object of the present invention.

1 Fastener 2 Fastening object 5 Body part 6 Elastic arm part 6a Free end 6b Base part 15 Engagement protrusion 19 Receiving part 20 Engagement hole x1 Central axis

Claims (10)

The body has a head and a body, and the body is introduced into a receiving part formed on the object to be fastened by elastic deformation of an elastic arm that becomes a part of the body towards the center of the body. At the same time, a part of the elastic arm part is inserted into the engagement hole formed in the side wall of the receiving part by elastic return of the elastic arm part at the completion position of the introduction, and is fastened to the fastening target. A fastener that can be
The elastic arm portion is formed along a direction that revolves around the central axis of the body portion, and has an engagement protrusion that is engaged with the engagement hole between the base and the free end of the elastic arm portion. A fastener formed by forming a section. Two or more elastic arm portions are formed in the body portion at intervals in the direction of rotation around the central axis, and the elastic arm portion is adjacent to one free end of the elastic arm portions that are adjacent to each other in the direction of rotation of the central axis. 2. The fastener of claim 1, wherein the other bases of the arms are adjacent. Claim: The body portion is provided with a regulating portion that comes into contact with the elastic arm portion and prevents elastic deformation of the elastic arm portion when a force is applied in a direction to remove the body portion from the receiving portion. The fastener described in 1. 4. The fastener according to claim 3, wherein the body has a bottom part in which the elastic arm part is positioned between the body part and the head part, and the bottom part is provided with the regulating part. The fastener according to claim 1, wherein the engaging protrusion includes a side slope that gradually reduces the height of the engaging protrusion as it approaches the base side of the elastic arm. The fastener according to claim 1, wherein the engagement protrusion includes a lower inclined surface that gradually reduces the height of the engagement protrusion as it moves away from the head. The fastener according to claim 1, comprising a through hole for a string-like body extending between the head and the body. The fastener according to claim 1, wherein the head portion includes a knob portion. The fastener according to any one of claims 1 to 8, and the fastening object including the receiving portion of the body of the fastener,
A fastening structure configured such that an inner diameter of the receiving portion gradually decreases toward the back of the receiving portion. The fastening device comprises the fastener according to any one of claims 1 to 8, and the fastening object including the receiving portion of the trunk of the fastener, and
An automobile interior accessory, wherein the object to be fastened is a cylindrical body having the engagement hole in a side portion of the cylinder between one open end of the cylinder and the other end of the cylinder, which serve as an entrance of the receiving portion.

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