Fastener and automobile part
By designing staggered repeating unit snaps on the fastener base and using a two-stage molding process, the problems of insufficient holding force in the shear direction and high injection molding difficulty of fasteners are solved, thus realizing the manufacturing of high-strength fasteners.
Patent Information
- Application Number
- CN202520217715.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing fasteners have good holding force in the vertical direction, but insufficient holding force in the shear direction, making them prone to undesirable separation. Furthermore, it is difficult to balance the elastic deformation and repeated overlap strength of the fastener during injection molding, especially when the substrate and fastener are small and have high density, making the processing difficult.
The design incorporates a repeating arrangement of latches in the repeating units on the base. The latches are staggered in the first and second directions, and the shear holding force is enhanced by appropriate head and rod dimensions and the diagonal length of the center point. At the same time, a two-stage molding process is used to simplify the manufacturing process.
It improves the lap strength of fasteners in the shear direction and the tensile strength in the vertical direction, ensuring that they are not easy to fall off, and simplifies the injection molding process, making it suitable for the manufacture of small-sized, high-density fasteners.
Smart Images
Figure CN223814221U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a fastener and an automobile component, and more particularly to a fastener and an automobile component comprising a plurality of buckles. BACKGROUND
[0002] Some fasteners comprise a substrate and a plurality of mushroom head-shaped buckles densely arranged on the substrate, the mushroom head-shaped buckles having a certain elasticity. When two fasteners are aligned and a pressing force is applied, the buckles can be locked by mutual embedding to form a mechanical interlocking system. When a pulling force is applied to the fasteners, the two fasteners can be separated, so that the mechanical interlocking system can have repeatable combination (or connection ability). In some existing fasteners, the pull-out force or holding force of the mechanical interlocking system is increased by the arrangement mode of the buckles to avoid the undesired separation of the two fasteners. For example, the buckles are arranged in a repeating triangular unit or a repeating hexagonal unit.
[0003] And some existing fasteners are made of resin material, and the plurality of buckles are densely arranged on the substrate by injection molding. CONTENT OF THE UTILITY MODEL
[0004] The inventors of the present application have found that even if the holding force of the buckles of the fastener in the vertical direction is good, the holding force in the shear direction is insufficient, which still causes the undesired separation of the two fasteners. And in the process of injection molding the fastener, the elastic deformation ability and the strength of repeated lapping of the buckles need to be maintained, and when the size and density of the substrate and the buckles are small, the difficulty of injection molding is high.
[0005] The present application provides a fastener comprising a base and a plurality of buckles. Each buckle comprises a head and a stem, the stem extending from the base to form, and the head being arranged at the distal end of the stem, wherein the plurality of buckles comprises a plurality of repeating units arranged in a repeating arrangement on the base, each repeating unit comprising four buckles arranged in a quadrilateral. Wherein, between each repeating unit, a plurality of repeating units are arranged in a repeating arrangement along a first direction and a second direction, so that the corresponding buckles in each repeating unit are arranged in parallel in a row along the first direction, and arranged in parallel in a column along the second direction; and in each repeating unit, the four buckles are arranged staggered in the first direction and the second direction.
[0006] According to the above, each of the buckles has a height H. Wherein, the distance between the stems of each of the buckles is greater than H / 3.
[0007] According to the above, in each of the repeating units, the four buckles are arranged in a parallelogram, and the line connecting the center points of the two buckles on each side of the parallelogram is not parallel to the first direction and the second direction.
[0008] According to the above, in each of the repeating units, the angle between the line connecting the center points of the two buckles on the side of the parallelogram along the first direction and the first direction is 5-30°, and the angle between the line connecting the center points of the two buckles on the side of the parallelogram along the second direction and the second direction is 5-30°.
[0009] According to the above, the projection of the head of each buckle in the height direction is circular and has a maximum diameter D1. Wherein the maximum diameter D1 of each head satisfies: 0.5mm
[0010] According to the above, the projection of the stem of each buckle in the height direction is circular and has a minimum diameter D2. Wherein the minimum diameter D2 of each stem satisfies: 0.3mm
[0011] According to the above, the projection of the head of each buckle in the height direction is circular and has a maximum diameter D1; and the projection of the stem of each buckle in the height direction is circular and has a diameter D2. Wherein in each of the repeating units, the length D3 or D4 of the line connecting the center points of the two buckles on the diagonal of the quadrilateral satisfies: D1+D2
[0012] According to the above, the density of the stems of the buckles on the base is 50-500 per square inch.
[0013] According to the above, the fastener further comprises a clasp portion arranged below the base.
[0014] According to the above, the base is rectangular, and the edges of the base extend along the first direction and the second direction, respectively.
[0015] The application also provides an automobile part comprising the fastener provided by the application.
[0016] The fastener of the application arranges several buckles in a suitable manner on the base in repeating units. By staggering the buckles in the repeating units in the first direction and the second direction, the shear holding force of the fastener is increased, thereby ensuring the lap strength of the fastener in the shear direction. And by setting the size of the head and stem of the buckle, and the length of the diagonal line of the center points of the buckles in the repeating unit, the lap strength of the fastener in the vertical direction is ensured. Therefore, the tensile strength of the two fasteners after lapping is better, and it is not easy to fall off undesirably.
[0017] And the fastener of the present application simplifies the injection molding process by setting the size of the stem of the clasp and the distance between the stems of the respective clasps, so that even when the size of the clasp of the fastener is small and the density is high, it can be manufactured by a two-shot molding process.
[0018] Other objects and advantages of the present application will be apparent from the following description of the application, taken in connection with the accompanying drawings, and will help to provide a full understanding of the application. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1A A perspective view of a fastener according to one embodiment of the present application is shown;
[0020] Figure 1B A perspective view of a fastener according to one embodiment of the present application is shown; Figure 1A A front view of the fastener shown;
[0021] Figure 1C A perspective view of a fastener according to one embodiment of the present application is shown; Figure 1A A left view of the fastener shown;
[0022] Figure 2 A perspective view of a fastener according to one embodiment of the present application is shown; Figure 1A A front view of a single clasp in the fastener shown;
[0023] Figure 3A A perspective view of a fastener according to one embodiment of the present application is shown; Figure 1A A top view of the fastener shown;
[0024] Figure 3B A perspective view of a fastener according to one embodiment of the present application is shown; Figure 3A A partial schematic view of a quadrangular repeating unit in the fastener shown.
[0025] MAIN IDENTIFICATION EXPLANATION
[0026] Fastener 100 Base 101
[0027] Clasp 102 Clasp 110
[0028] Stem 111 Head 112
[0029] Cantilever 103 Notch 104
[0030] Repeating unit 320 DETAILED DESCRIPTION
[0031] Various specific embodiments of the present application will be described below with reference to the accompanying drawings, which are incorporated in, and constitute a part of this specification. It should be understood that, although terms indicating directions, such as "front", "back", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like are used in the present application to describe various example structural parts and elements of the present application, these terms are used herein only for the purpose of convenience of explanation, and are determined based on the example orientation shown in the accompanying drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are only for illustration and should not be considered as limiting.
[0032] In the present application, the "shearing direction" refers to the direction of the plane formed by the first direction x and the second direction y.
[0033] Figures 1A-1C The structure of the fastener 100 according to one embodiment of the present application is shown for the purpose of illustrating the general structure of the fastener 100. Figure 2 A front view of a single hook 110 is shown for the purpose of illustrating the more specific structure of the hook 110. In this figure Figure 1A is a perspective view of the fastener 100, Figure 1B is Figure 1A is a front view of the fastener 100 shown, Figure 1C is Figure 1A is a side view of the fastener 100 shown. As Figures 1A-1C and Figure 2 shown, the fastener 100 includes a base 101 and a plurality of hooks 110. The base 101 is generally flat and rectangular in shape, such as a generally square-shaped flat plate. In some embodiments, the base 101 is a square plate of 25*25 mm in size. Two edges of the base 101 extend along the first direction x and the second direction y, respectively. The first direction x and the second direction y are perpendicular to each other. There is a notch 104 in the front of the base 101, which facilitates the operator to determine the position and direction of the fastener 100.
[0034] The plurality of hooks 110 are densely arranged in an array above the base 101. Each hook 110 is generally the same shape and size, and includes a head 112 and a stem 111. In the present embodiment, the hook 110 is generally centrally symmetric in shape. The stem 111 is generally a cylindrical rod shape extending from the base 101. In the present embodiment, the stem 111 extends generally vertically upward from the upper surface of the base 101. The head 112 is generally a mushroom head shape with a smooth curved top surface and an inclined side surface. The head 112 is disposed at the distal end of the stem 111, i.e., the head 112 is disposed at the top of the stem 111. In some embodiments, the density of the stem 111 of the hook 110 on the base 101 is 50-500 per square inch.
[0035] However, it is understood by those skilled in the art that the stem 111 of the clasp 110 can not be limited to a cylindrical shape, but can also be a conical shape with a smaller top diameter than a bottom diameter, or any other stem shape. Also, the head 112 can not be limited to a mushroom head shape, but can be any shape as long as the head 112 has a diameter that is larger than the diameter of the stem 111 at least at one location. The head 112 is typically centered on the stem 111, but other offset locations are also possible.
[0036] Further referring to Figure 2 As shown, the fastener 100 has a height direction, which is a direction perpendicular to the base 101. Each clasp 110 has a height H. The projection of the head 112 of each clasp 110 in the height direction is circular and has a maximum diameter D1. In this embodiment, the head 112 is a mushroom head shape, and the maximum diameter D1 is the diameter of the bottom of the head 112. In some embodiments, the maximum diameter D1 satisfies: 0.5mm < D1 < 2mm. The projection of the stem 111 of each clasp 110 in the height direction is also circular and has a minimum diameter D2. In this embodiment, the stem 111 is a cylindrical shape, and the minimum diameter D2 is the diameter of the cylindrical stem. In some embodiments, the minimum diameter D2 satisfies: 0.3mm < D2 < 1mm. The size and arrangement of the clasp 110 will be further described in Figure 3A and Figure 3B described in detail.
[0037] The elongated shape of the stem 111 allows the clasp 110 to have a certain elasticity. When the heads of the clasps 110 of two fasteners 100 are aligned head-to-head, the application of pressure to at least one of the fasteners 100 can cause the clasp 110 to elastically deform to allow the clasps 110 of the two fasteners 100 to embed into each other, for example, with the clasp 110 of one fastener 100 embedding between adjacent clasps 110 of the other fastener 100. Also, the heads 112 of the clasps 110 of the two fasteners 100 are engaged with each other to prevent the two fasteners 100 from being easily separated. The application of tension to at least one of the fasteners 100 can cause the clasp 110 to elastically deform to allow the two fasteners 100 to be separated. In this way, the two fasteners 100 can be repeatedly connected or separated.
[0038] In the present embodiment, the fastener 100 further comprises a clasp portion 102. The clasp portion 102 is disposed below the base 101 for connecting with other components. When two fasteners 100 are repeatedly connected or disconnected, the other components connected with the clasp portions 102 of the two fasteners 100 are also repeatedly connected or disconnected. In the present embodiment, the clasp portion 102 is connected below the middle portion of the base 101 and comprises a pair of cantilever arms 103 extending outwardly from the bottom of the clasp portion 102. Through the cantilever arms 103, the clasp portion 102 is capable of snap-fit connection with the matching structure on the other components. It is understood by those skilled in the art that the clasp portion 102 can be of any shape as long as it is capable of snap-fit connection with the corresponding matching structure of the other components. In other embodiments, the fastener 100 can also not comprise the clasp portion 102.
[0039] In some embodiments, the fastener 100 is made of resin material so that the buckles 110 have better strength and elasticity. In the present embodiment, the fastener 100 is made of thermoplastic resin, such as polyethylene or polypropylene, etc.
[0040] As an example, the fastener 100 is made by a two-step molding process. In the first step of the molding process, the base 101, the stem portion 111 of the buckle 110 and the clasp portion 102 of the fastener 100 are formed by one-time injection molding. In the second step of the molding process, the head portion 112 is formed on the top of the stem portion 111 of the buckle 110 using a mold, for example, by heating the top of the stem portion 111 to a molten state and then cooling to form the head portion 112. The two-step molding process facilitates the processing procedure and facilitates demolding.
[0041] Figure 3A And Figure 3B for illustrating the specific arrangement of the buckles 110 of the fastener 100. Among them Figure 3A shows a top view of the fastener 100, Figure 3B shows the specific structure of a single repeating unit 320. As Figure 3A and Figure 3B shown, a plurality of buckles 110 comprises a plurality of repeating units 320, which are arranged in a repeating arrangement on the base 101. Between the respective repeating units 320, the repeating units 320 are arranged in a repeating arrangement along the first direction x and the second direction y, so that the corresponding buckle 110 of each repeating unit 320 is arranged in parallel along the first direction x into a row, as shown by the dashed line in Figure 3A . And the corresponding buckle 110 of each repeating unit 320 is arranged in parallel along the second direction y into a column, as shown by the dashed line in Figure 3AIn some embodiments, the distance between each repeating unit 320, in the first direction x and the second direction y, can be the same or different, but the distance between the bars 111 of the respective fastener 110, whether within a repeating unit 320 or between repeating units 320, is greater than H / 3. Such an arrangement facilitates meeting the process requirements of injection molding in the first molding process.
[0042] Each repeating unit 320 includes four fasteners 110 arranged in a quadrilateral. For ease of illustration, a single repeating unit 320 is shown in FIG. 3A, which includes fasteners 110a, 110b, 110c, and 110d. In this embodiment, the four fasteners 110a, 110b, 110c, and 110d of the repeating unit 320 are arranged in a parallelogram. The four fasteners 110a, 110b, 110c, and 110d in each repeating unit 320 are staggered in the first direction x and the second direction y. As a result, in the first direction x and the second direction y, a channel in the shape of a generally wavy line can be formed between adjacent fasteners 110. When the fasteners 110 of two fasteners 100 are engaged with each other, and the fasteners of the opposing fastener are inserted into the space surrounded by the four fasteners of the repeating unit 320, the staggered fasteners can block the opposing fasteners from sliding in the first direction x or the second direction y, thereby applying a shear holding force to the opposing fastener to resist the shear force in the first direction x or the second direction y, and preventing the opposing fastener from being directly pulled out in the first direction x or the second direction y. Figure 3B In this embodiment, the four fasteners 110a, 110b, 110c, and 110d in each repeating unit 320 are arranged in a parallelogram. The four fasteners 110a, 110b, 110c, and 110d have respective center points A, B, C, and D. The center points of the fasteners on each side of the parallelogram are not parallel to the first direction x and the second direction y. That is, the line AB is parallel to the line CD, and the line AC is parallel to the line BD, but neither of these lines is parallel to the first direction x or the second direction y. Such an arrangement ensures that the four fasteners 110a, 110b, 110c, and 110d are staggered in the first direction x and the second direction y. In some embodiments, the angle between the line AB and the first direction x, i.e., the angle between the line CD and the first direction x, is 5-30°. Also, the angle between the line AC and the second direction y, i.e., the angle between the line BD and the second direction y, is 5-30°.
[0043]
[0044] In the present embodiment, the lengths D3 and D4 of the lines AD and BC, which are the lines connecting the center lines of the two buckles 110 on the diagonals of the quadrangle in each repeating unit 320, satisfy D1+D2<D3 or D4<2*D1. By setting the stem 111 and the head 112 of the buckle 110 to be appropriate diameters, and setting the lengths of the lines AD and BC within each repeating unit 320, the lap strength of the fastener 100 in the vertical direction (i.e., the height direction) can be ensured. And by setting the buckles in each repeating unit 320 to be staggered in the first direction x and the second direction y, the lap strength of the fastener 100 in the shear direction can be ensured.
[0045] In some specific embodiments, such as when the fastener 100 of the present application is applied to automobile parts, for example, to interior trim parts for automobiles, the shear holding force in a fastener in which the buckles are not staggered is only about 60N. However, the shear holding force of the fastener 100 of the present application in the first direction x can be 100N or more, and the shear holding force in the second direction y can be 150N or more.
[0046] Although the present disclosure has been described in connection with the examples of the embodiments outlined above, it will be evident to those skilled in the art that various alternatives, modifications, variations, improvements, and / or substantially equivalent solutions, whether presently known or which can become known in the future, can be made to the examples of the embodiments of the present disclosure as set forth above. Accordingly, the examples of the embodiments of the present disclosure, as set forth above, are intended to be illustrative, not limiting. Various changes can be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all such alternatives, modifications, variations, improvements, and / or substantially equivalent solutions as can be perceived by those of ordinary skill in the art. The technical effects and technical problems in the specification are exemplary and not limiting. It should be noted that the embodiments described in the specification can have other technical effects and can solve other technical problems.
Claims
1. A fastener, characterized in that... include: Base; and A plurality of latches, each latch including a head and a rod, the rod extending from the base and the head disposed at the distal end of the rod, wherein the plurality of latches include a plurality of repeating units arranged in a repeating manner on the base, each repeating unit including four latches arranged in a quadrilateral. Among them, among each of the repeating units, multiple repeating units are repeatedly arranged along a first direction and a second direction, such that the corresponding buckles in each repeating unit are arranged in parallel rows along the first direction and in parallel columns along the second direction. as well as In each repeating unit, the four buckles are staggered in both the first and second directions.
2. The fastener according to claim 1, characterized in that: Each of the aforementioned buckles has a height H; The distance between the rods of each of the buckles is greater than H / 3.
3. The fastener according to claim 1, characterized in that: In each repeating unit, four buckles are arranged in a parallelogram, and the line connecting the center points of two buckles on each side of the parallelogram is not parallel to the first direction and the second direction.
4. The fastener according to claim 3, characterized in that: In each repeating unit, the line connecting the center points of the two buckles on the side of the parallelogram along the first direction makes an angle of 5 to 30° with the first direction, and the line connecting the center points of the two buckles on the side of the parallelogram along the second direction makes an angle of 5 to 30° with the second direction.
5. The fastener according to claim 1, characterized in that: The projection of the head of each buckle in the height direction is circular, and has a maximum diameter D1, wherein the maximum diameter D1 of each head satisfies: 0.5mm < D1 < 2mm; and / or The projection of the bar portion of each hook in the height direction is circular and has a minimum diameter D2, wherein the minimum diameter D2 of each bar portion satisfies: 0.3mm < D2 < 1mm.
6. The fastener according to claim 1, characterized in that: The projection of the head of each buckle in the height direction is circular, and it has a maximum diameter D1; and The projection of the rod portion of each buckle in the height direction is circular, and has a diameter D2; In each of the repeating units, the length D3 or D4 of the line connecting the center points of the two buckles on the diagonal of the quadrilateral satisfies: D1+D2<D3 or D4<2*D1.
7. The fastener according to claim 1, characterized in that: The density of the rod portion of the buckle on the base is 50 to 500 per square inch.
8. The fastener according to claim 1, characterized in that: The fastener also includes a snap-fit part disposed below the base.
9. The fastener according to claim 1, characterized in that: The base is rectangular, and the edges of the base extend along the first direction and the second direction, respectively.
10. An automotive component, characterized in that... Includes fasteners according to any one of claims 1 to 9.