CN101023822A - Vibrant buffer fastener - Google Patents

Abstract

A shock absorbing fastener comprising: a socket (110) made of synthetic resin having a cylindrical body (111) extending from a belt mounting portion (112); and a synthetic resin socket (110) having a frame-shaped body (121) A plug (120) made of resin, the frame-shaped main body fits into the socket and extends from a belt mounting portion (122), a spring support member (130) made of synthetic resin along the right and left frame bodies of the frame-shaped main body The inner faces of (121a, 121b) are slidably fitted. At this time, a spring (140) is independently inserted and supported between the inner face of the frame body (121c) and the spring support member on the opposite side of the belt mounting portion of the plug. Engaging claws (135 to 137) provided on the spring supporting member are engaged with one or more engaging claw fitting holes (114 to 116) formed on opposite wall portions in the thickness direction of the open side end portion of the socket, so that the plug and The socket is formed in one piece.

Description

Vibration Absorbing Fasteners

technical field

The present invention relates to a fastener for connecting two or more objects, such as two or more straps or yokes, and more particularly to a vibration dampening The fastener has a suitable shock absorbing function between the belt and the object such as the yoke afterwards.

Background technique

This type of shock-absorbing fastener has been used in various fields, as a strap connection device for various bags such as golf bags, soft bags and hard bags, as a support connection device such as various sporting goods, And as a connection device for health appliances, rehabilitation appliances and work yokes. Typical examples of vibration-absorbing fasteners have been disclosed, for example, in Japanese Patent Application Publication No. 2001-178506 (Patent Document 1) and Taiwan Utility Model Application Publication No. 228653 (Patent Document 2).

The vibration-absorbing fastener disclosed in Patent Document 1 is a mat-type fastener that is used to connect a male fastener and a female fastener through a body or a cord or directly to exert a good vibration Buffer function. The male fastener is composed of a rectangular frame body, which is entirely made of thermoplastic synthetic resin, and has a mounting portion (hereinafter referred to as hereinafter referred to as ) for a belt such as a belt, strap, and yoke at one end of the frame body. It is the belt installation part). The male fastener includes a shock absorbing body integrally molded with the male fastener from the center of the inner face of the one end frame of the frame body toward the belt mounting portion side on opposite sides of the belt mounting portion. Female fasteners, on the other hand, consist of a rectangular thin-walled box with a belt mounting portion at one end of the box and the other end is open. The rectangular frame body of the male fastener is insertable into an interior space from the open end portion. In addition, a plurality of sliding claws are provided which protrude from the center portions of the outer sides of the right and left frames of the male fastener, and the sliding claws are loosely fitted halfway formed on the right and left inner sides of the female fastener. The sliding groove of the sliding claw, like this, can guide the sliding of the sliding claw. In addition, a through hole is formed in the center of an open end portion of each of the upper and lower walls of the female fastener, and an engaging protrusion engaged with the through hole is protrudingly provided at the free end portion of the vibration damping body of the male fastener. superior.

With this structure, the male fastener is inserted into the female fastener, and the engaging portion engages with the through hole in the female fastener. Thereafter, if the male fastener and the female fastener are pulled in a direction to separate from each other, the male fastener elastically slides through the vibration buffer body along the sliding groove inside the female fastener, and releases the tension when the tension force is released. Return to a position at the time of insertion. That is, the vibration-absorbing fastener has the function of buffering a considerable pulling force. After the product is connected by connecting the male fastener and the female fastener, with the help of the internal buffer body, the vibration-absorbing fastener can be used after the product is put into use. function.

On the other hand, the shock-absorbing fastener disclosed in Patent Document 2 includes: a main ring made of a completely rectangular uncovered box with a mounting portion at one end thereof; an auxiliary ring having a mounting portion at one end thereof; ring, and a pair of right and left engagement levers extending parallel to each other, forming a distance from the belt mounting portion; a letter U-shaped engagement slidably disposed within the interior space of the main ring and engaged with the engagement ring of the auxiliary ring member; a coil spring disposed between the pair of engaging levers of the auxiliary ring in the inner space of the main ring, the coil spring having one end supported by the inner seating surface of the engaging member and supported by the main ring on the opposite side of the belt mounting portion; the other end partially supported by the inner wall surface of the ring; and a rectangular plate similar to an upper cover fitted in the upper opening portion of the main ring to close it. A mounting surface for the spring is formed on the bottom of the main ring, and a pair of insertion grooves through which the engagement levers of the auxiliary ring are inserted are formed in wall portions on opposite sides of the belt mounting portion. Engaging pawls each having an engaging surface on one side of the belt mounting portion are protrudingly provided on the front end of the engaging lever. Engaging claws for engaging or disengaging the engaging claws are protrudingly provided on the paired right and left lever portions of the letter U-shaped engaging member so as to face inwardly. In addition, the upper cover and the main ring have fitting portions that fit each other.

With such a structure, in the vibration damping fastener described in Patent Document 2, the engaging lever of the auxiliary ring is inserted into the main ring, and the engaging claws are engaged with the engaging claws of the engaging member as in Patent Document 1. If the belt mounting portions of the main ring and the auxiliary ring are pulled in directions away from each other after the main ring and the auxiliary ring are assembled by engaging the main ring with the upper cover, the engagement member moves inside the main ring while compressing the spring. If the tension is released, the primary and secondary rings return to their assembled state.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-178506

Patent Document 2: Taiwan Utility Model Application Publication No. 228653

In the vibration-absorbing fastener described in Patent Document 1, an engaging protrusion protruding from one end portion of the cushioning body is fitted into a through hole of a female fastener only by inserting the rectangular frame body of the male fastener. Into the internal space of the female fastener, the assembly of the vibration-absorbing fastener can be completed. Therefore, it can be assembled more easily than the vibration-absorbing fastener described in Patent Document 2. However, in the vibration-absorbing fastener described in Patent Document 1, the space for arranging the vibration-absorbing fastener needs to be large enough to allow the vibration-absorbing body to elastically deform effectively because the vibration-absorbing body is formed in a ring shape or a letter 8 that shape. However, it is difficult to obtain a sufficient deployment space within the limited space of the female fastener, and due to its shape, the amount of deformation of the vibration buffer is small, and it is difficult to obtain a predetermined buffer function. In addition, because the vibration damping body is integrally formed when the frame body is molded so that one end thereof is fixed to the inner face of the rectangular frame body of the male fastener, the damping capacity of the vibration damping body cannot be changed corresponding to the application. For a fastener having a desired cushioning capacity, the cushioning body and the male fastener need to be manufactured separately, which leads to increased manufacturing costs because molding costs and the like are increasing.

On the other hand, in the vibration damping fastener described in Patent Document 2, the number of its parts is extremely large, and its assembly cannot be efficiently realized. In addition, although the assembly is completed by fitting and fixing the upper cover to the main ring at the end, when the vibration acts on the main ring, the upper cover may slip out of the main ring, and when the upper ring slides out, the corresponding parts along the Breaks down and spreads out in all directions.

Contents of the invention

The present invention has been achieved to eliminate the above-mentioned problems of prior art vibration dampening fasteners, and it is an object of the present invention to provide a vibration dampening fastener which is easy to assemble and which, once assembled, cannot be easily disassembled, which Stably ensuring a predetermined vibration damping capacity, and being able to obtain a vibration damping capacity corresponding to an application, although having the same size and the same shape, the vibration damping fastener allows its vibration damping capacity to be arbitrarily changed, and ensures High productivity.

The above objects are effectively achieved by a vibration-absorbing fastener comprising: a socket made of synthetic resin having a strap mounting portion at one end thereof and having a strap extending from the strap mounting portion. Cylindrical main body; a plug made of synthetic resin having a belt mounting portion at one end thereof and having a frame-shaped main body extending from the belt mounting portion, the frame-shaped main body being slidably fitted and inserted into the cylinder of the socket In the main body; a spring support member made of synthetic resin is slidably fitted and attached along the inner faces of the right and left frame bodies of the frame-shaped main body; and a spring is inserted and supported in the belt mounting portion of the plug. Between the inner face of the plug frame body and the spring support member on the opposite side, wherein the socket has engagement claw fitting holes correspondingly having at least one or more holes in the opposite wall portion along the thickness direction of the open side end portion of the socket and the engaging claws engaged and fixed with the engaging claw fitting holes are protrudingly provided at portions of the spring support member corresponding to the corresponding engaging claw fitting holes.

According to a preferred aspect, a coil spring is used as the spring. According to a further preferred aspect, the sliding surfaces of the right and left frame bodies of the plug or of the spring support member have guide grooves and the other sliding surface has guide rails. In this case, the guide rails are provided on the inner faces of the right and left frame bodies of the plug, and the guide grooves are provided in the right and left side surfaces of the spring support member, one of which can be installed with the right and left ends of the spring support member. A mounting gap exists between an end face on the tape mounting portion side of the guide rail and an end face of the tape mounting portion from which the frame-shaped main body extends.

According to still another preferred aspect of the present invention, the inner wall surface of the opposing wall portion is tapered toward a portion formed in the engagement claw fitting hole along the thickness direction of the socket main body, and the thickness of the wall portion gradually increases. In addition, preferably, the inner wall surfaces of the right and left side wall portions of the cylindrical main body and the inner wall surfaces of the opposite wall portion are connected with a continuous arc-shaped surface along the thickness direction of the main body.

The spring support member is disposed opposite the inner face of the strap mounting portion of the plug, and the spring is independently disposed between the spring support member and the inner face of the plug on the opposite side of the strap mounting portion. Furthermore, when the plug is inserted into the receptacle, the receptacle and the spring support member are immovably engaged with each other and fixed between the open end of the receptacle and the spring support member, thereby greatly increasing the movement distance of the plug within the receptacle. Furthermore, since the spring is independent of other components, any spring with a different spring force can be arbitrarily provided. Therefore, regardless of its size and shape, a fastener having an appropriate vibration damping function for a certain application can be obtained, thereby resulting in improved production efficiency.

Since the spring can be extended/contracted without changing the spring diameter if a coil spring is used as the spring, the right and left frame parts of the plug and the springs provided on the right and left part A gap works well. Therefore, considering the amount of deformation of the vibration damping body of synthetic resin integrally formed with the rectangular frame body as described in Patent Document 1, it is not necessary to obtain a large accommodation space for the spring.

In the case where the guide rails are arranged on the inner faces of the right and left frame bodies of the plug and the guide grooves are provided in the right and left sides of the spring support body, a mounting clearance for the right and left ends of the spring support body is formed Between an end surface on the side of the belt mounting portion of the guide rail and an end surface on the side of the belt mounting portion from which the frame extends. By forming the installation gaps for the right and left ends of the spring support body, the spring support body can be easily set on the inner face of the frame portion of the plug on the opposite side of the belt mounting portion, thereby facilitating the guide rail and the guide groove position. For this reason, the vibration buffering space need not be formed so large in consideration of deformation in the spring width direction.

Since the inner face surrounding the claw fitting hole in the receptacle is formed such that its thickness increases toward the portion where the claw fitting hole is formed, the claw fitting portion becomes difficult to deform. Therefore, even if a force trying to open the open end portion of the socket is applied, the engaging claw of the spring supporting member never slips out of the engaging hole in the socket. In addition, right and left wall surfaces of the cylindrical body are connected to inner wall surfaces opposed to each other in the thickness direction with an arcuate surface. Therefore, even if an eccentric force deviated from the spring extension/contraction direction is applied to the socket and the plug oppositely, stable extension and contraction functions as a fastener are ensured, and friction is reduced because there is no corner.

Description of drawings

Fig. 1 is an exploded perspective view of a vibration dampening fastener according to the present invention.

2A to 2C are explanatory views explaining the structure of the vibration damping fastener, FIG. 2A is its front view, FIG. 2B is its side sectional view, and FIG. 2C is its longitudinal sectional view.

Fig. 3 is a perspective view showing the appearance of the shock absorbing fastener.

Fig. 4 is a sectional view corresponding to Fig. 2B for explaining the internal structure of the vibration damping fastener in an extended state.

5A and 5B are a cross-sectional view taken along line V-V of FIG. 2A and a partially enlarged view thereof, respectively.

6 is an exploded perspective view showing the structures of a plug and a spring supporting member according to a second embodiment of the present invention.

Detailed ways

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of the invention.

Fig. 1 is an exploded perspective view of a vibration damping fastener according to this embodiment. The shock absorbing fastener 100 includes four parts, which include a socket 110 , a plug 120 , a spring support member 130 and a spring 140 . In this embodiment, polyacetal resin is used for the socket 110 , the plug 120 and the spring support member 130 . However, thermoplastic resins such as polyvinyl chloride, polypropylene, polyamide, and polyester are also permitted. Although it is required to use a metal coil spring as the spring, a coil spring made of synthetic resin may be used.

As shown in FIGS. 1 and 2A to 2C, the socket 110 has a belt mounting portion 112 at one end of a main body 111 of a box-shaped socket, and a cylindrical space of the socket body 111 is open to an end on the opposite side of the belt mounting portion. The strap mounting portion 112 is configured by extending a C-shaped strap winding rod 113 from one end surface on the bottom of the socket main body 111 . A strap is inserted into a strap insertion hole formed between the strap winding rod 113 and the bottom of the socket body 111 so that the strap can be mounted to the strap winding rod 113 by being wound around the strap winding rod 113 and then sewn. Three engagement claw fitting holes 114 to 116 are formed at predetermined intervals in the vicinity of the open end edge of the socket main body 111 and in respective front and rear surfaces along the open end edge.

As shown in FIGS. 1 and 2A to 2C, the plug 120 has a completely rectangular shape and has a belt mounting portion 122 at one end of a plug main body 121 composed of a rectangular body. The belt mounting portion 122 is completely formed in a letter C shape extending outward from one end along the length direction of the plug body 121 on the same plane as the plug body 121 . In this embodiment, guide rails 123, 124 are formed on opposite faces of the right and left frame bodies 121a, 121b of the plug main body 121 in the length direction, respectively. A first spring supporting protrusion 125 for supporting one end of the spring 140 is protrudingly provided in the center of the inner face (belt mounting portion side) of the frame body 121c connecting the right and left frames on the opposite side of the band frame portion Body 121a, 121b. The opposite side of the belt mounting portion means a side away from the belt mounting portion. A gap d that can accommodate the right and left end portions of the spring supporting member 130 is provided on an end surface of the guide rails 123, 124 on the belt mounting portion side and an inner surface of the frame body 121d having the belt mounting portion 122 (frame body 121c side).

In the spring supporting member 130, as shown in FIGS. 1 and 2A to 2C, its main body 131 has a width in the right and left directions equal to that between the opposite faces of the right and left frame bodies of the plug main body 121 constituted by a rectangular frame body. Pitch. A second spring bearing protrusion 132 is protrudingly provided at the center of its side (opposite side of the strip mounting portion of the plug) to provide a T-shaped structure. In this embodiment, depressed guide grooves 133 , 134 parallel to the protruding direction of the second spring support protrusion 132 are formed in right and left end surfaces of the main body 131 , respectively. As shown in FIG. 5A , the guide rails 123 , 124 formed in the plug body 121 are loosely fitted in the guide grooves 133 , 134 . According to this embodiment, the guide rails 123 , 124 are formed on the plug body 121 , and the guide grooves 133 , 134 are formed in the spring support member 130 . However, it is also possible to do the opposite, allowing the guide groove to be formed in the plug body 121 and the guide rail to be formed on the spring support member 130 . Engagement claws 135 to 137 will engage three engagement claw fitting holes 114 to 116 formed along the front and rear wall portions at the open end edge of the socket 110, and the engagement claws 135 to 137 are along the guide groove 133 perpendicular to the spring support member 130. The direction (thickness direction) of the plane formed by , 134 is protrudingly provided on the front and rear faces.

The socket 110, plug 120, spring support member 130, and spring 140 having the above-described structure are assembled in the following manner, thereby forming the vibration damping fastener 100 of this embodiment.

First, the spring supporting member 130 is brought into contact with the inner surface of the belt mounting side frame body 121d of the plug 120 . In addition, with the second spring support portion 122 of the spring support member 130 facing the frame body 121c opposite to the belt installation side frame body 121d, the right and left end portions of the spring support member 130 are fitted to the guide rails 123, 124 and the belt installation frame formed on the guide rails 123, 124 and the belt installation side frame body 121c. In a gap between the inner surfaces of the side frame body 121d. Both right and left end portions of the spring support member 130 are fitted in this gap d, and guide grooves 133, 134 formed in the right and left end portions are set at fitting positions with respect to guide rails 123, 124 formed on the plug 120. . Next, the second spring support protrusion 132 of the spring support member 130 supports one end of the spring 140 . Meanwhile, the first spring supporting protrusion 125 of the plug 120 supports the other end of the spring 140 .

The frame body 121c on the opposite side of the strap mounting portion is disposed opposite to the strap mounting portion 122 of the plug 120, and its right and left ends are integrally connected to ends on the opposite side of the strap mounting portion. A space for supporting the spring supporting member 130 and the spring 140 is formed between the frame body 121c on the opposite side of the belt mounting portion, the right and left frame bodies 121a, 121b, and the frame body 121d on the belt mounting portion side.

The length of the spring is set such that a slight compressive force is applied to the spring 140 when the spring 140 is supported between the plug 120 and the spring support member 130 . Therefore, when the plug 120 and the spring support member 130 support the spring 140, the spring support member 130 is compressed against the inner face of the frame body 121d on the belt mounting portion side of the plug main body 121, so that, as shown in FIGS. 2B, 2C , which is accommodated together with the spring 140 in the above-mentioned space within the rectangular frame of the plug main body 121 . With the spring supporting member 130 and the spring 140 being supported, the main body 121 of the plug 120 is inserted into the internal space of the socket main body 111 . At this inserted terminal position, engaging claws 135 to 137 protruding from the spring support member are fitted into engaging claw fitting holes 114 to 116 formed in the socket open end edge portion. As a result, the receptacle 100 and the spring support member 130 are immovably connected relative to each other, thus completing the shock absorbing fastener 100 having an appearance as shown in FIG. 3 .

Sides opposite to the engaging surfaces of the respective engaging claws 135 to 137 are formed in surfaces inclined downward toward the fitting hole insertion direction so that the engaging claws 135 to 137 engage with the engaging claw fitting holes 114 to 116 . The engaging surfaces of the respective engaging pawl fitting holes 114 to 116 of the engaging pawls 135 to 137 are formed in one face perpendicular to the front and rear surfaces of the spring supporting member 130, so that when the engaging pawls 135 to 137 are engaged with the engaging pawl fitting holes 114 to 116 When engaged, the engaging claws 135 to 137 are never easily disengaged from the engaging claw fitting holes 114 to 116 . Therefore, when the plug 120 is inserted into the socket 110, the socket 110 and the plug 120 are integrally formed with each other, so that the shock absorbing fastener of this embodiment cannot be disassembled unless destroyed.

When an external force is applied to the shock-absorbing fastener 100 assembled in this way, for example, when a momentary pulling force is applied to the socket 110 and the plug 120, a pressure acts on the spring supporting member 130 inserted in the socket 110 integrally. and the spring 140 between the plug 120. Therefore, a relative movement along the direction of elastic extension occurs between the socket 110 and the plug 120 (as shown in FIG. 4 ). If the pulling force is released in this condition, the socket 110 and the plug 120 return to their original states as shown in FIG. 3 by the force of the spring 140 in the releasing direction. The shock absorbing fastener 100 not only receives the pulling force, but also a compressive impact force in the direction of the belt or the direction in which the tension is applied is deviated from the direction of the belt, or a force in the direction of torsion is applied thereto.

Therefore, in this embodiment, the inner surface structure of the socket 110 is designed as shown in FIGS. 5A and 5B .

As shown in the first device, the inner wall surface of the socket 110 is formed as a circular surface with a large radius, so that the engaging claw fitting holes 114 to 116 around the socket 110, especially the engaging claw fitting hole 115 around the center, which The thickness increases as it goes deeper toward the engagement claw fitting hole 115 . If the inner wall surface at the open end of the socket 110 is formed into a circle, as shown in FIGS. The peripheral edge of the engaging claw 136 is brought into pressure contact, and at the same time, the rigidity of this portion is strengthened as its thickness increases. Therefore, even if a force in the thickness direction is applied to the vibration damping fastener 100, the spring supporting member 130 in the socket cannot move in the thickness direction. Therefore, the engagement claw 136 never slips out of the engagement claw fitting hole 115 . This is not limited to compressive forces in the thickness direction of the socket 110 , but the matter can be said for forces trying to open the open end of the socket 110 as well.

As shown in the second device, as shown in FIGS. 5A and 5B , the inner surfaces of the right and left wall portions of the socket 110 are arc-shaped, and the inner surfaces and the inner surfaces of the upper and lower wall portions are connected by an arc-shaped surface. Due to the connection by the arc surface, so even if a force in the twisting direction is applied between the socket 110 and the plug 120, the right and left frame bodies 121a, 121b of the plug 120 are smoothly guided by the arc surface of the socket 110, thereby , eliminates the danger that the plug could get snagged by anything inside the receptacle causing damage. According to this embodiment, as described above, not only the socket inner face but also the outer faces of the right and left frame bodies 121a, 121b of the plug 120 are formed in an arcuate face in the vertical direction.

Figure 6 shows a second embodiment of the invention. This embodiment differs from the first embodiment in that no guide rails are formed on the inner faces of the right and left frame bodies 121a, 121b of the main body 121 constituted by the rectangular frame bodies of the plug 120, and therefore, no guide grooves are formed on Inside the right and left outer sides of a spring bearing member. In the vibration damping fastener 100 of the present invention, as described above, the spring supporting member 130 and the spring 140 are accommodated in the rectangular frame-shaped plug body 121 , and the plug 120 is inserted into the inner space of the socket 110 in this case. Therefore, when the belt mounting portions 112, 122 of the socket 110 and the plug 120 are pulled away from each other, the spring support member 130 and the spring 140 are never exposed outside the socket 110, and always exist in the inner space of the socket 110. Inside. Therefore, it is not always necessary to provide guide rails or guide grooves as described in the first embodiment.

Claims (6)

1. A vibration dampening fastener, comprising:

a socket (110) made of synthetic resin having a strap attaching portion (112) at one end thereof and having a cylindrical main body (111) extending from the strap attaching portion (112);

a synthetic resin-made plug (120) having a band mounting portion (122) at one end thereof and having a frame-shaped body (121) extending from the band mounting portion (122), the frame-shaped body (121) being slidably fitted and inserted into the cylindrical body (111) of the socket (110);

a spring support member (130) made of synthetic resin slidably fitted and attached along inner faces of the left and right frame bodies (121a, 121b) of the frame-shaped body (121); and

a spring (140) inserted and supported between an inner face of the frame body (121c) on the side opposite to the band mounting portion of the plug (120) and the spring support member (130),

wherein,

the socket (110) has engaging claw fitting holes (114 to 116) having at least one hole in opposite wall portions in the thickness direction of an open-side end portion of the socket, respectively, an

Engagement claws (135 to 137) engaged with and fixed to the engagement claw fitting holes (114 to 116) are protrudingly provided on portions of the spring bearing member (130) corresponding to the respective engagement claw fitting holes (114 to 116).

2. The vibration damping fastener according to claim 1, wherein the spring (140) is a coil spring supported between a first spring support protrusion (125) and a second spring support protrusion (132), wherein the first spring support protrusion (125) protrudes from an inner face of the frame body (121c) on a side of the plug (120) opposite to the tape mounting portion, and the second spring support protrusion (132) protrudes from a side face of the spring support member (130) opposite to the tape mounting portion.

3. The vibration damping fastener according to claim 1, wherein one of the sliding surfaces of the left and right frame bodies (121a, 121b) of the plug (120) and the sliding surface of the spring bearing member (130) has guide grooves (133, 134), and the other has guide rails (123, 124).

4. A vibration damping fastener according to claim 3, wherein said guide rails (123, 124) are provided on inner faces of left and right frame bodies (121a, 121b) of the plug (120), and said guide grooves (133, 134) are provided in left and right side faces of the spring bearing member (130), and a mounting clearance (d) in which left and right end portions of the spring bearing member (130) can be mounted exists between an end face of the guide rails (123, 124) on the side with the mounting portions and an end face from which the frame-shaped body with the mounting portions (122) extends.

5. The vibration damping fastener according to claim 1, wherein the inner wall surfaces of the thickness-direction opposite wall portions of the socket main body (111) are tapered toward the portion where the engaging-pawl fitting hole is formed, and the thickness of the wall portions is gradually increased.

6. The vibration damping fastener according to claim 1, wherein inner wall surfaces of right and left side wall portions of the cylindrical body (111) and inner wall surfaces of opposite wall portions in a thickness direction of the body (111) are connected by a continuous arc surface.

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