Self-locking snap fastener
Technical Field
The invention belongs to the field of buttons, and particularly relates to a self-locking snap fastener.
Background
The snap fastener is composed of a male buckle and a female buckle, and realizes the meshing of the joint parts of clothes, bags and the like through the mutual occlusion of the male buckle and the female buckle.
The existing snap fasteners are mainly made of two materials, namely plastic or metal, the snap fasteners made of the plastic materials need extremely high manufacturing precision to overcome the clamping error between the female fastener and the male fastener caused by temperature difference and environmental temperature difference during manufacturing, and the snap fasteners made of the metal can reduce the clamping error caused by the temperature difference and the environmental temperature difference during manufacturing, but also need relatively high manufacturing precision to ensure the normal use of the snap fasteners.
The snap fasteners made of the plastic or metal materials are buckled by extruding to enable a part of the male fastener and the female fastener to deform so as to realize buckling, and the buckling of the snap fasteners in the mode is very easy to cause the snap fasteners to cause the buckling error between the female fastener and the male fastener due to the abrasion of the materials, so that the male fastener and the female fastener are accidentally separated, the materials are fatigued and lose elasticity, and the snap fasteners cannot be buckled.
Disclosure of Invention
Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a self-locking snap fastener which is automatically locked when a female snap is engaged with a male snap, does not come off by an accidental pull, and does not fail to be normally used due to wear of the snap fastener and fatigue of materials.
To achieve the object, a self-locking snap fastener comprises: male and female buttons; the male buckle is composed of a male buckle body and a disc-shaped surface buckle which are coaxially arranged, a round through hole is formed in the axis of the disc-shaped surface buckle, the upper end of the male buckle body penetrates through the round through hole to protrude out of the disc-shaped surface buckle, a protruding inserting part is arranged at the lower end of the male buckle body, the inserting part vertically extends downwards along the disc-shaped surface buckle, the female buckle is composed of a female buckle body and a disc-shaped bottom buckle which are coaxially arranged, the female buckle body is cylindrical and vertically arranged on the bottom buckle, and a cylindrical cavity of the female buckle body is a receiving part for inserting the inserting part of the male buckle body;
a plurality of spiral grooves are formed in the inner wall of the cylindrical cavity of the female buckle body from top to bottom;
the pin thread body includes: the button is in an inverted barrel shape and is sleeved at the upper end of the central column, the lower end of the button penetrates through the supporting plate to be abutted against the upper end of the movable buckle, the button is upwards provided with four notches along the lower end, the central column is a cylinder and is connected with the supporting plate through four connecting blocks which are arranged at equal intervals near the periphery of the upper end, a plurality of guide rails are vertically arranged downwards along the joint with the supporting plate on the periphery of the central column, the lower end of the central column is provided with a supporting groove for supporting the spring, the supporting plate is in a circular plate shape, the axis of the supporting plate is provided with through holes allowing the button and the central column to pass through, the spring is supported and sleeved on the periphery of the lower part of the central column through the supporting groove, the movable buckle is a cylinder provided with a through hole along the axis, the movable buckle is downwards sleeved on the, the movable buckle is characterized in that a plurality of guide rails which are arranged on the inner wall of the through hole with the relatively small diameter at the upper part of the through hole and correspond to the outer peripheral side of the central column are vertically arranged along the upper port, a gap is formed between the through hole with the relatively large diameter at the lower part of the through hole and the central column, the gap is used for placing a spring, the upper end of the spring is abutted against the movable buckle on a step which is formed by the inner wall of the through hole due to different diameters, and a plurality of spiral grooves which are arranged on the outer peripheral side of the movable buckle.
Further, many heliciform recess inner walls that set up in the box body cavity are smooth inner wall, and its cross-section semicircular in shape sets up.
Furthermore, the surfaces of the spiral protrusions arranged on the outer periphery of the movable buckle are smooth surfaces, and the cross section of the spiral protrusions is semicircular corresponding to the cross section of the spiral groove.
Further, the width of four notches formed in the button along the lower end in an upward direction is larger than the width of four connecting blocks.
Furthermore, the lower ends of the plurality of guide rails arranged on the outer periphery of the central column are all arc-shaped.
Furthermore, both sides of the upper port of the plurality of guide rail grooves formed in the upper part of the movable buckle through hole are arc-shaped.
Furthermore, the inclined opening is formed in the upper port of each spiral groove arranged in the cavity of the female buckle body.
Furthermore, the lower ends of the spiral protrusions arranged on the outer periphery of the movable buckle are all arc-shaped.
Furthermore, a plurality of hemispherical bulges are arranged on the lower end surface of the button.
Advantageous effects
1. In the technical scheme, the male buckle and the female buckle are easily buckled and locked by utilizing the vertical displacement of the movable buckle, the male buckle or the female buckle is deformed to realize buckling without strong pressing, and the problems of accidental disengagement, incapability of buckling and the like caused by material abrasion or material fatigue are avoided.
2. In this technical scheme, the activity is detained and is in unable rotating state by the guide rail restraint that sets up on the center post, and unable rotatory activity is detained under the state of the mutual interlock of heliciform arch and heliciform recess, locks in the box, realizes the lock of snap-fastener, and this lock state can effectively promote lock intensity, avoids pulling the production because of the accident and breaks away from.
3. In the technical scheme, when the snap fastener is required to be opened, the button is pressed down to enable the movable buckle to be in a rotatable state, and the male buckle and the female buckle can be easily separated.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a sectional view showing an initial state of the self-locking snap fastener of the present invention.
FIG. 3 is a cross-sectional view of the self-locking snap fastener of the present invention when the button is pressed before the self-locking snap fastener is engaged.
FIG. 4 is a cross-sectional view of the automatic snap fastener of the present invention after being engaged.
Fig. 5 is a schematic view of a male buckle structure according to the present invention.
Fig. 6 is a schematic view of a female buckle structure according to the present invention.
FIG. 7 is a sectional view showing an initial state of the self-locking snap fastener of the present invention.
FIG. 8 is a cross-sectional view showing the self-locking snap fastener of the present invention when the button is pushed before the self-locking snap fastener is engaged.
FIG. 9 is a cross-sectional view of the self-locking snap fastener of the present invention after being engaged.
Fig. 10 is an exploded view of the male buckle of the present invention.
Fig. 11 is an exploded view of the male buckle of the present invention.
Fig. 12 is a schematic view of a movable buckle structure in the present invention.
FIG. 13 is a schematic view of a button structure according to the present invention.
Detailed Description
The present invention is further illustrated in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from the description herein, and it will be readily appreciated by those skilled in the art that the present invention can be embodied in many different forms without departing from the spirit and scope of the invention.
As shown in fig. 1, the present invention provides a self-locking snap fastener comprising: a male buckle 1 and a female buckle 2; the male buckle 1 is composed of a male buckle body 11 and a disc-shaped surface buckle 12 which are coaxially arranged, a circular through hole 121 is formed in the axis of the disc-shaped surface buckle 12, the upper end of the male buckle body 11 penetrates through the circular through hole 121 and protrudes out of the disc-shaped surface buckle 12, a protruding inserting part 13 is arranged at the lower end of the male buckle body 11, the inserting part 13 vertically extends downwards along the disc-shaped surface buckle 12, the female buckle 2 is composed of a female buckle body 21 and a disc-shaped bottom buckle 22 which are coaxially arranged, the female buckle body 21 is cylindrical and is vertically arranged on the disc-shaped bottom buckle 22, and a cylindrical cavity of the female buckle body 21 is a receiving part 23 for inserting the inserting part 13 of the male buckle body 11;
as shown in fig. 6, a plurality of spiral grooves 211 are formed on the inner wall of the cylindrical cavity of the female buckle body 21 from top to bottom;
as shown in fig. 2, 3, 5, 10, and 11, the male buckle body 11 includes: the button 111 is in an inverted cylindrical shape and is sleeved at the upper end of the central column 112, the lower end of the button 111 penetrates through the supporting plate 113 to be abutted against the upper end of the movable buckle 115, the button 111 is upwards provided with four notches 1111 along the lower end, the central column 112 is a cylinder and is connected with the supporting plate 113 through four connecting blocks 1121 which are arranged close to the outer periphery of the upper end at equal intervals, the outer periphery of the central column 112 is downwards vertically provided with a plurality of guide rails 1122 along the joint with the supporting plate 113, the lower end of the central column 112 is provided with a supporting groove 1123 for supporting the spring 114, the supporting plate 113 is in a circular plate shape, the axis of the supporting plate is provided with a through hole for allowing the button 111 and the central column 112 to pass through, the spring 114 is supported and sleeved at the lower outer periphery of the central column 112 through the supporting groove 1123, and the movable buckle 115, this activity is detained 115 and is established in center post 112 periphery side along 113 lower terminal down cover of backup pad, and this activity is detained 115 through-hole and is divided into two upper and lower parts that the diameter is different, wherein the activity detains many guide rails 1122 that correspond center post 112 periphery side setting on the through-hole inner wall that 115 through-hole upper portion diameter is relatively little of through-hole, along the last port down seted up many guide rail grooves 1151 perpendicularly, be formed with the clearance between the through-hole that this activity detains 115 through-hole lower part diameter is relatively big and the center post 112, this clearance is used for placing of spring 114, this spring 114 upper end butt is detained 115 through-hole inner wall because of the different steps that form of diameter at the activity, the activity is detained many helic.
Further, as shown in fig. 6, the inner walls of the plurality of spiral grooves 211 arranged in the cavity of the female buckle body 21 are smooth inner walls, and the cross section of the inner walls is semicircular.
Further, as shown in fig. 5, the plurality of spiral protrusions 1152 disposed on the outer circumferential side of the movable buckle 115 have a smooth surface, and the cross section thereof is disposed in a semicircular shape corresponding to the cross section of the spiral groove 211.
Further, the width of the four slots 1111 of the button 111 opened upward along the lower end is greater than the width of the four connection blocks 1121.
Further, in order to facilitate the insertion of the guide rails 1122 into the guide rail grooves 1151, as shown in fig. 11, the lower ends of the plurality of guide rails 1122 provided on the outer circumferential side of the center post 112 are each formed in an arc shape.
Further, in order to facilitate the insertion of the guide rail 1122 into the guide rail groove 1151, as shown in fig. 12, both sides of the upper end opening of the plurality of guide rail grooves 1151 formed in the upper portion of the through hole of the movable buckle 115 are formed in an arc shape.
Further, in order to facilitate the insertion of the spiral protrusion 1152 into the spiral groove 211, as shown in fig. 6, the upper ports of the plurality of spiral grooves 211 arranged in the cavity of the female buckle body 21 are provided with oblique ports; the bezel enlarges the port receiving area on the helical groove 211 to facilitate insertion of the helical projection 1152.
Further, in order to facilitate the insertion of the movable button into the female button, as shown in fig. 12, the lower ends of a plurality of spiral protrusions 1152 provided on the outer circumferential side of the movable button 115 are formed in an arc shape.
Further, in order to reduce the friction force between the button 111 and the movable buckle 115, as shown in fig. 13, a plurality of hemispherical protrusions 1112 are provided on the lower end surface of the button 111; the hemispherical protrusions 1112 can reduce the contact surface between the button 111 and the movable button 115, thereby reducing the friction between the button and the movable button.
The working principle of the invention is as follows:
in the technical scheme, before the male buckle 1 and the female buckle 2 are buckled, the button 111 is pressed to enable the movable buckle 115 to move downwards, disengaged from the guide track 1122 on the central post 112, and in a rotatable state, with the insertion of the pin 1, the plurality of spiral protrusions 1152 on the outer peripheral side of the movable button 115 are inserted into the plurality of spiral grooves 211 provided in the cavity of the box body 21, so that the movable button 115 is rotated downward along the plurality of spiral grooves 211, when the movable buckle 115 completely enters the female buckle 2, the button 111 is released, the spring 114 lifts the movable buckle 115 to reset, at this time, the movable buckle 115 is restrained by the guide track 1122 arranged on the central post 112, and is in a non-rotatable state, and the non-rotatable movable buckle 115 is in a state that the spiral protrusion 1152 and the spiral groove 211 are engaged with each other, the snap fastener is locked in the female buckle 2 to realize the buckling of the snap fastener, and the buckling state can effectively improve the buckling strength and avoid the separation caused by accidental pulling; when the button needs to be opened, the button 111 is pressed to enable the movable button 115 to be in a rotatable state, and the male buckle 1 and the female buckle 2 can be easily separated.
What needs to be proposed is: in the technical scheme, the male buckle 1 and the female buckle 2 are easily buckled and locked by utilizing the vertical displacement of the movable buckle 115, the male buckle 1 or the female buckle 2 is deformed to realize buckling without strong pressing, and the problems of accidental disengagement, incapability of buckling and the like caused by material abrasion or material fatigue are avoided.