Cedar head staple bolt structure

Abstract

The utility model relates to a cedar head staple bolt structure which comprises a main body structure. The cedar-shaped tooth-shaped group is arranged on the upper layer of the main body structure and comprises a trunk part at the central position and four layers of cedar-shaped tooth-shaped structures which are arranged on the periphery of the trunk part and are distributed in the axial direction; the four layers of cedar-shaped tooth-shaped structures are a first cedar-shaped tooth shape, a second cedar-shaped tooth shape, a third cedar-shaped tooth shape and a fourth cedar-shaped tooth shape from bottom to top in sequence, and h1 is larger than h2, and h2 is equal to h3. Aiming at the defects in the existing production technology, the utility model provides the cedar head staple bolt structure, by designing cedar-shaped tooth-shaped structures with different heights and reasonable tooth pitches, the wide adaptability to common mounting substrates with various thicknesses in the market is realized, at least two layers of cedar-shaped tooth shapes are exposed after mounting, and enough clamping force is provided. Meanwhile, due to the optimized design of the connecting angle of the cedar-shaped tooth-shaped group and the trunk part, the installation process is convenient and firm.

Description

Technical Field

[0001] The utility model relates to the technical field of fir tree head clips, in particular to a fir tree head clip structure. Background Art

[0002] With the rapid development of the automobile industry, the complexity and integration of the internal structure of automobiles are increasing, and the requirements for the fixation and layout of parts are also increasing.

[0003] Cable ties are widely used in all aspects of automobile manufacturing and maintenance, mainly including engine compartment, chassis, cab and trunk. In the engine compartment, cedar head staples are used to fix the intricate wiring harnesses to ensure that they can still work stably under high temperature and vibration environment; in the chassis part, cable ties help fix key pipelines such as oil pipes and brake pipes to prevent safety hazards caused by looseness. In addition, in the cab and trunk, automotive cable ties also play an important role in organizing wiring harnesses and optimizing space layout. The cedar head staples are connected to the car cable ties and fixed to specific holes through staples.

[0004] The importance of the fir tree head staple structure is mainly reflected in the following aspects: Improve installation efficiency: By designing reasonable staples, the installation process of cable ties can be simplified, the operation time can be reduced, and production efficiency can be improved. Enhance the fixing effect: The staples can ensure that the cable ties are firmly fixed in the designated position to prevent loosening or falling off due to factors such as vibration and impact. Protect surrounding parts: Reasonable staple design can prevent the cable ties from causing compression damage to surrounding parts and extend the service life of the car. Facilitate maintenance and replacement: Some staples support the rapid installation and removal of cable ties, which is convenient for later maintenance and replacement.

[0005] At present, the ratio between the height of the existing fir tree head nail structure and the thickness of the connected mounting plate is usually 1:0.05-0.5, and the diameter of the corresponding mounting hole is within the diameter range of the fir tree-shaped tooth shape. Usually, the diameter of the mounting hole is about half of the diameter of the fir tree-shaped tooth shape, so that the fir tree-shaped tooth shape can be engaged with the mounting hole position of the mounting plate, that is, a nail with a height of 10mm corresponds to a mounting plate with a thickness of 0.5-5mm. The common height of the common fir tree head nail structure is 7.5mm, and the corresponding mounting plate thickness is between 0.6-3mm; usually, the insertion force of the thin plate is 40-50N, and the pull-out force is 150-200N; the insertion force of the thick plate is 50-60N, and the pull-out force is 150-200N.

[0006] This also shows that for mounting plates of different thickness ranges, corresponding heights of staples will be used, and for mounting holes of different diameter ranges, corresponding fir-tree-shaped tooth diameters of staples will be used;

[0007] Based on the above summary, the current fir tree head nail structure has a relatively small scope of application. When used on thin plates, it is prone to shaking, and when used on thick plates, the pull-out force is small and it is easy to fall off.

[0008] At the same time, when it comes to installing substrates with different apertures, the applicable range is relatively small. When the aperture is small, the insertion force of the fir tree head staple is too large, and when the aperture is large, the pull-out force of the fir tree head staple is too small, and it is not suitable for extreme apertures.

[0009] For example, Chinese patent CN217294439U discloses a car wiring harness fixing tie, in which a mounting seat (referred to as a staple in this patent) adopts a fir-tree-shaped structure, including a mounting seat body, a radially extending end cover portion is provided at the upper end of the mounting seat body, and a plurality of annular protrusions (referred to as fir-tree-shaped teeth in this patent, the same below) are provided on the side surface of the mounting seat body.

[0010] Figure 1 The schematic diagram of the structure of the prior art is shown. The fir tree head nail structure adopts an equidistant structural design, and the tooth structures of multiple fir tree-shaped teeth are exactly the same.

[0011] In actual use, the above structure has a relatively balanced force due to the fact that the multiple annular protrusions (fir-tree-shaped teeth) have the same structure and are equidistantly distributed. With this design, there is often a common phenomenon that if the insertion force is too large, the extraction force will also be large, making installation and removal difficult and not conducive to installation. At the same time, due to the difficulty in installation, excessive force during insertion can easily cause fatigue of the annular protrusions (fir-tree-shaped teeth), which will also affect the fixing effect as the car shakes.

[0012] If the insertion force is small, it is easy to install, but the stability is poor and it is easy to fall off when the car is bumpy.

[0013] In addition, the size of the insertion and extraction force is also related to the number of annular protrusions (fir tree-like teeth). Because the height of the staple is certain, if the number of annular protrusions (fir tree-like teeth) is too large, the thickness of each layer of annular protrusions (fir tree-like teeth) will be too small, and the force generated will also be too small. Therefore, too many numbers will also affect the force. At the same time, if the number is too small, its adaptability will be relatively small. If there are only 1-2 annular protrusions (fir tree-like teeth), they can only match a small number of mounting holes. If the number is too small, the thickness of each layer of annular protrusions (fir tree-like teeth) cannot be designed to be too thick, otherwise it will not be easy to insert into the mounting hole. Therefore, the number of annular protrusions (fir tree-like teeth) must also be optimized and limited.

[0014] At the same time, since the annular protrusions in the prior art are arranged equidistantly, when installing on a thin plate, if the thin plate is smaller than the tooth pitch of the annular protrusions of the bottom layer, the fir head nails will shake on the thin plate, and will fall off over time; when installing on a thick plate, the number of annular protrusions of the fir head nails extending out of the thick plate is often too small, resulting in too small a pull-out force, and there is also a risk of falling off. Therefore, traditional fir head nails are not suitable for extreme plate thicknesses.

[0015] In addition, when it comes to installation holes of different apertures, the traditional fir tree head staples are not very adaptable. The multiple annular protrusions in the comparison document have the same structure and are equidistantly distributed. When the aperture is small, the insertion force of the fir tree head staples is too large, and when the aperture is large, the pull-out force of the fir tree head staples is too small, which is not suitable for extreme apertures.

[0016] To this end, we propose a fir tree head nail structure. Utility Model Content

[0017] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a fir tree head clamp structure, which realizes wide adaptability to various thicknesses of common mounting base plates on the market by designing fir tree-shaped tooth structures of different heights and reasonable tooth pitches, ensuring that at least two layers of fir tree-shaped teeth are exposed after installation, providing sufficient clamping force. At the same time, the optimized fir tree-shaped tooth group and the trunk connection angle design make the installation process convenient and firm, reducing the installation difficulty and labor intensity.

[0018] The technical solution adopted by the utility model is as follows:

[0019] A fir tree head nail structure comprises a main structure; and a fir tree-shaped tooth group arranged on the upper layer of the main structure.

[0020] The fir-tree-shaped tooth group includes a trunk at a central position, and four layers of fir-tree-shaped tooth structures arranged on the periphery of the trunk and distributed along the axial direction;

[0021] The four layers of the fir-tree-like tooth structure are fir-tree-like tooth shape one, fir-tree-like tooth shape two, fir-tree-like tooth shape three, and fir-tree-like tooth shape four from bottom to top, and the tooth pitch h1 between fir-tree-like tooth shape one and fir-tree-like tooth shape two is greater than the tooth pitch h2 between fir-tree-like tooth shape two and fir-tree-like tooth shape three, and the tooth pitch h2 between fir-tree-like tooth shape two and fir-tree-like tooth shape three is equal to the tooth pitch h3 between fir-tree-like tooth shape three of 500 and fir-tree-like tooth shape four of 600.

[0022] Furthermore, the fir-tree-shaped tooth profile group is engaged with mounting substrates of different thicknesses, with at least the upper two layers of fir-tree-shaped teeth exposed.

[0023] Furthermore, except for the uppermost fir-tree-shaped tooth-shaped structure, the connection angles of the other fir-tree-shaped tooth-shaped structures with the trunk are the same, and the angle range is 25-70 degrees.

[0024] Furthermore, the diameter of the fir-tree-like tooth-shaped structure in the uppermost layer is smaller than that of other fir-tree-like tooth-shaped structures in the lower layer, and except for the fir-tree-like tooth-shaped structures in the uppermost layer, the diameters of the fir-tree-like tooth-shaped structures in other layers are the same.

[0025] Furthermore, the connection between the fir-tree-shaped tooth shape one, the fir-tree-shaped tooth shape three and the fir-tree-shaped tooth shape four and the trunk portion adopts an arc transition, and a lag connection is formed between the fir-tree-shaped tooth shape four and the fir-tree-shaped tooth shape three.

[0026] Furthermore, the width of the trunk diameter H2 corresponding to the fir-tree-shaped tooth shape II is greater than the width of the trunk diameter H1 corresponding to the fir-tree-shaped tooth shape I, the thickness of the fir-tree-shaped tooth shape II is greater than the thickness of other fir-tree-shaped tooth shapes, and the fir-tree-shaped tooth shape II and the trunk shape are directly connected without an arc transition, which can shorten the width of the fir-tree-shaped tooth shape II and improve the strength requirements. Because the fir-tree-shaped tooth shape II contacts the thickest mounting substrate, it mainly bears the axial force in the direction of the trunk shape rather than bending moment or shear force. This direct connection method is sufficient to meet the strength requirements.

[0027] Furthermore, two side ribs are axially arranged on the outer wall of the trunk, and the two side ribs are centrally symmetrically arranged. The two side ribs extend to the main structure and form a cross structure with the main structure to improve the overall strength.

[0028] Furthermore, a buffer layer is connected to the periphery of the main structure, and the buffer layer is a trumpet-shaped structure opening upward, and the tooth pitch h0 between the fir-tree-shaped tooth shape one and the buffer layer is smaller than the tooth pitch h2 between the fir-tree-shaped tooth shape two 400 and the fir-tree-shaped tooth shape three 500, so as to adapt to the thinnest mounting substrate, and the distance h0 is 0.05-0.1 of the height of the fir-tree head staple structure, and the distance h1 is 0.3-0.5 of the height of the fir-tree head staple structure.

[0029] Furthermore, a docking seat is connected to the lower end of the main structure for docking with the cable tie.

[0030] Furthermore, the main structure, the fir-tree-shaped tooth group, the side ribs, the buffer layer, and the docking seat are integrally formed.

[0031] The beneficial effects of the utility model are as follows:

[0032] The utility model has a compact and reasonable structure and is easy to operate. By designing fir-tree-shaped tooth structures of different heights and a reasonable tooth pitch, it achieves wide adaptability to various thicknesses of common mounting base plates on the market, ensuring that at least two layers of fir-tree-shaped teeth are exposed after installation, providing sufficient clamping force. At the same time, the optimized connection angle design of the fir-tree-shaped tooth group and the trunk makes the installation process convenient and firm, reducing the installation difficulty and labor intensity. The one-piece molding design and the side rib setting on the outer wall of the trunk further enhance the strength and stability of the staples and extend their service life. The specific fir-tree-shaped tooth structure design, such as the lagging connection and direct connection methods, effectively reduces the insertion force and increases the extraction force, thereby improving the installation effect and quality. In addition, the docking seat design at the lower end of the main structure realizes the fixing function of the cable tie, increases the use scenarios and flexibility of the staples, and meets the diverse needs of users.

[0033] At the same time, the utility model also has the following advantages:

[0034] Combined with the specific structure, the beneficial effects of the fir tree head nail structure of the utility model are mainly reflected in the following aspects:

[0035] 1. Strong adaptability, compatible with various mounting substrate thicknesses: Through the careful design of different heights of the fir-tree-shaped tooth structure and reasonable tooth pitch, the utility model can adapt to various thicknesses of mounting substrates commonly seen on the market. Whether it is a thinner mounting substrate or a thicker mounting substrate, the clamping nail can ensure that at least two layers of the fir-tree-shaped teeth are exposed after installation, thereby providing sufficient clamping force to ensure the stability and reliability of the installation.

[0036] 2. Easy and firm installation, improving production efficiency: The connection angle between the fir-tree-shaped tooth group and the trunk has been optimized, so that the installation structure can be easily installed into the counterpart with a small insertion force, reducing the difficulty and labor intensity during the installation process. At the same time, a large extraction force is required to pull out the parts, ensuring the firmness of the installation and improving the overall production efficiency and user experience.

[0037] 3. Structural optimization, improved strength, and extended service life: By adopting an integrated molding design, the utility model reduces the connection links between components and improves the overall strength and stability. At the same time, side ribs are set on the outer wall of the trunk to further enhance the load-bearing capacity and anti-deformation ability of the fir-tree-shaped tooth group, making the nail more stable and reliable during use and extending its service life.

[0038] 4. Reduce insertion force, increase extraction force, and improve installation effect: The specific fir-tree tooth structure design, such as the lagging structure between fir-tree tooth shape 4 and fir-tree tooth shape 3, and the direct connection between fir-tree tooth shape 2 and the trunk, effectively reduce the insertion force, making the installation process easier and faster. At the same time, these designs also increase the extraction force, making the nails easier to install while also enhancing their fixing effect, improving the overall installation quality and stability.

[0039] 5. Multifunctional design to meet diverse needs: The docking seat design at the lower end of the main structure allows the cable tie to be easily connected to the staples, realizing the fixing function of the cable tie. This multifunctional design makes the staples not only suitable for the installation of automotive cable ties, but also for other scenarios where cable ties need to be fixed, increasing the use scenarios and flexibility of the staples and meeting the diverse needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a schematic diagram of the structure of a fir tree head staple in the prior art.

[0041] Figure 2 It is a structural schematic diagram of the fir tree head nail in the utility model.

[0042] Figure 3 for Figure 2 Schematic diagram of the BB cross-section structure.

[0043] Figure 4 This is a cross-sectional view of the connection structure between the fir tree head clamp and mounting base plates of different thicknesses according to the utility model.

[0044] Figure 5 It is a three-dimensional structural schematic diagram of the utility model.

[0045] Figure 6 It is a three-dimensional structural schematic diagram of another viewing angle of the utility model.

[0046] Figure 7 It is a top view of the utility model.

[0047] Figure 8 This is a test diagram of the insertion force of the fir tree head nail of the utility model.

[0048] Fig. 9 This is a test diagram of the pull-out force of the fir tree head nail of the utility model.

[0049] in:

[0050] 10. Mounting substrate; 11. Mounting hole;

[0051] 100, main structure; 200, buffer layer; 300, fir-tree-shaped tooth profile one; 400, fir-tree-shaped tooth profile two; 500, fir-tree-shaped tooth profile three; 600, fir-tree-shaped tooth profile four; 700, top; 800, docking seat; 900, first side rib; 1000, second side rib. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] As described in the background art, it is necessary to meet the extreme performance requirements of extreme height, extreme aperture, and extreme plate thickness.

[0058] Based on the above considerations, in order to solve the problem that traditional fir head nails cannot meet the ultimate performance requirements of ultimate hole diameter and ultimate plate thickness at a predetermined height.

[0059] See also Figure 1-Figure 7 According to some embodiments of the present application, a fir tree head staple structure is provided, which is provided with a plurality of unequally spaced fir tree-shaped tooth structures.

[0060] The fir tree head nail structure of the utility model is described in detail below in conjunction with specific embodiments.

[0061] Example 1

[0062] The present application considers that the clamps, mounting plates and mounting holes are all discussed in the context of corresponding matching.

[0063] The utility model embodiment 1 provides a fir tree head nail structure, such as Figures 1 to 8 As shown, it mainly includes a main structure 100 and a fir-tree-shaped tooth group arranged on the upper layer of the main structure 100. The fir-tree-shaped tooth group includes a trunk at the center and at least three layers of fir-tree-shaped tooth structures arranged on the periphery of the trunk and distributed along the axial direction.

[0064] In the present embodiment, there are four fir-tree-like tooth structures. In actual use, four fir-tree-like tooth structures are the most reasonable. Under the condition of limited height, if the number of fir-tree-like tooth structures is greater than four, the height of the fir-tree-like tooth structures will inevitably be reduced, thereby reducing the strength and achieving poor results. If the number of fir-tree-like tooth structures is less than four, the height of the fir-tree-like tooth structures will be increased. Although the strength is better, the yield strength is too large and it is not easy to be inserted into the mounting hole 11.

[0065] At the same time, in this embodiment, the height of the fir-tree-shaped tooth structure is that the diameter of the top fir-tree-shaped tooth structure is smaller than that of other fir-tree-shaped tooth structures in the lower layer, and except for the top fir-tree-shaped tooth structure, the diameters of the other layers of fir-tree-shaped tooth structures are the same. The spacing between the multiple fir-tree-shaped tooth structures is different, and they are used to clamp the mounting substrates 10 of different thicknesses, and after being clamped to the mounting substrate 10, at least two layers of fir-tree-shaped tooth structures are exposed.

[0066] Specific as Figure 3As shown, there are four groups of fir-tree-shaped tooth profiles, which are fir-tree-shaped tooth profile 1 300, fir-tree-shaped tooth profile 2 400, fir-tree-shaped tooth profile 3 500, and fir-tree-shaped tooth profile 4 600 from bottom to top. Among them, the tooth pitch h1 between fir-tree-shaped tooth profile 1 300 and fir-tree-shaped tooth profile 2 400 is greater than the tooth pitch h2 between fir-tree-shaped tooth profile 2 400 and fir-tree-shaped tooth profile 3 500, and the tooth pitch h2 between fir-tree-shaped tooth profile 2 400 and fir-tree-shaped tooth profile 3 500 is equal to the tooth pitch h3 between fir-tree-shaped tooth profile 3 500 and fir-tree-shaped tooth profile 4 600. Among them, the distance h1 is 0.3-0.5 of the height of the fir tree head clamp structure (specifically referring to the total height of the part above the buffer layer 200). The purpose of this design is to adapt to installation substrates 10 of different thicknesses and ensure that at least two layers of fir tree-like teeth are exposed after clamping, thereby providing sufficient clamping force. By reasonably widening the height of h1, two layers of fir tree-like tooth structures can still be exposed when installing a thicker installation substrate 10, thereby improving the overall clamping force.

[0067] In this embodiment, when installing a thinner mounting substrate 10, since the buffer layer 200 is connected to the periphery of the main structure 100, the buffer layer 200 is a trumpet-shaped structure with an opening facing upward. At the same time, the tooth pitch h0 between the fir-tree-shaped tooth shape 1 300 and the buffer layer 200 is smaller than the tooth pitch h2 between the fir-tree-shaped tooth shape 2 400 and the fir-tree-shaped tooth shape 3 500, so as to adapt to the thinnest mounting substrate 10. Among them, the distance h0 is 0.05-0.1 of the height of the fir-tree head staple structure. Such a design can ensure that when the staple is clamped to a thinner mounting substrate 10, it can be in closer contact with the thin plate, thereby solving the shaking problem.

[0068] In this embodiment, the connection between each fir tree-shaped tooth shape and the trunk portion adopts an arc transition, which can buffer the stress concentration at the connection, thereby improving the strength and toughness of the fir tree-shaped tooth shape. At the same time, the thickness of each fir tree-shaped tooth shape is the same, which can ensure that the fir tree-shaped tooth shape group can be evenly stressed when clamping and installing the base plate 10, thereby improving the overall stability.

[0069] Even if the thickness of the mounting substrate 10 increases, since the connecting end of the fir-tree-shaped tooth shape 1 300 adopts an arc transition, sufficient clamping force can still be provided for a thicker mounting substrate 10 .

[0070] In this embodiment, the upper end of the fir-tree-shaped tooth group is connected to a top portion 700, and a sink is provided in the middle thereof to facilitate the guiding function when installing the parts. At the same time, in order to design the parts with equal wall thickness, it is avoided that the local material thickness is too thick and causes the appearance to shrink.

[0071] Except for the top fir-tree-shaped teeth, the other fir-tree-shaped teeth have the same connection angle with the trunk, ranging from 25 to 70 degrees, and preferably from 30 to 50 degrees. This design allows the mounting structure to be installed into the counterpart with a smaller insertion force, and requires a larger extraction force to extract the component, thereby improving the convenience and firmness of installation.

[0072] Example 2

[0073] The fir tree head nail structure provided in Example 2 of the present invention has a structure that is basically the same as that in Example 1, but differs in the design and connection method of the fir tree-shaped tooth shape 400.

[0074] like Figures 4 to 6 As shown, in this embodiment, the second fir-tree-shaped tooth shape 400 is directly connected to the trunk portion without arc transition. This design method can shorten the width of the second fir-tree-shaped tooth shape 400 and improve its strength requirements. Because the second fir-tree-shaped tooth shape 400 contacts the mounting base plate 10 with the largest thickness, it mainly bears the axial force in the direction of the trunk portion rather than the bending moment or shear force. This direct connection method is sufficient to meet the strength requirements.

[0075] In order to prevent the fir tree head nail from falling off and further increase the extraction force, the thickness of the second fir tree-shaped tooth shape 400 is greater than the thickness of other fir tree-shaped tooth shapes. In this way, the bearing capacity of the second fir tree-shaped tooth shape 400 can be further improved, so that it can better adapt to the mounting base plate 10 with a larger thickness. At the same time, the width of the trunk diameter H2 corresponding to the second fir tree-shaped tooth shape 400 is also greater than the width of the trunk diameter H1 corresponding to the first fir tree-shaped tooth shape 300. Such a design can ensure that the width of the second fir tree-shaped tooth shape 400 is smaller, so that the bending range is smaller, thereby increasing the axial force of the trunk, and can provide sufficient clamping force when clamping the mounting base plate 10, and maintain a stable connection state.

[0076] In another embodiment, Figure 3 As shown, the connection between the fir-tree-shaped tooth shape 4 600 and the trunk adopts an arc transition, and a hysteresis connection is formed between the fir-tree-shaped tooth shape 4 600 and the fir-tree-shaped tooth shape 3 500, that is, the fir-tree-shaped tooth shape 4 600 is connected to the side wall of the fir-tree-shaped tooth shape 3 500.

[0077] Since the diameter of the fir tree-shaped tooth profile four 600 is relatively small and the connecting surface with the fir tree-shaped tooth profile three 500 is relatively large, the clamping effect of the fir tree-shaped tooth profile three 500 can be improved, while preventing the fir tree-shaped tooth profile three 500 from turning outward. Even if the mounting substrate 10 falls off from the fir tree-shaped tooth profile two 400, under the action of the fir tree-shaped tooth profile three 500, the reinforcement effect of the mounting substrate 10 is further improved, thereby preventing the fir tree head pin from falling off. At the same time, the above-mentioned structural design can also effectively reduce the insertion force, thereby achieving the effect of reducing the insertion force and improving the pull-out force.

[0078] The structure and design of other parts are basically the same as those in Example 1, including the main structure 100, the fir-tree-shaped tooth group, the top 700, the sink, the side ribs, the buffer layer 200, the docking seat 800, etc. The design and function of these parts are the same as those described in Example 1, so they will not be repeated here.

[0079] like Figure 8-Figure 9 As shown, the test results of the insertion force and extraction force of the fir tree head staple structure in the utility model are shown, and the vertical axis is the magnitude of the force. The test objects are: the height of the fir tree head staple (specifically the total height of the part above the buffer layer 200) is 7.5mm, the diameter of the fir tree-shaped tooth shape 300 is 7.65mm, and there are 6 models of the mounting substrate 10, which are: thickness 0.7 / 3.0mm, hole diameter 6.3 / 6.5 / 6.7mm.

[0080] The results show that when installing the mounting substrates 10 with different hole diameters and different thicknesses, the insertion force can be effectively reduced while the extraction force can be increased.

[0081] When installing on a thin plate, for a mounting hole 11 with a smaller aperture, the force is relatively stable. Although the pull-out force is large, the insertion force is also slightly increased. For a mounting hole 11 with a larger aperture, the insertion force is significantly reduced. Although the pull-out force fluctuates greatly, it is all above the traditional pull-out force range, and the pull-out force can be improved.

[0082] Especially when installing on thick plates, it has a very stable force, and the effect is most obvious when installing on mounting holes 11 with larger apertures. It can not only reduce the insertion force, but also increase the extraction force, thereby improving the overall performance.

[0083] Therefore, it can be concluded that the relationship between the diameter of the mounting hole 11 and the outer diameter of the fir-tree-shaped toothed structure, when meeting 1:1.1-1.3, can meet the requirement of improving the extraction force under the action of a smaller insertion force.

[0084] Example 3

[0085] The fir tree head nail structure provided in Example 3 of the utility model combines the design features of Example 1 and Example 2, and makes some further optimizations and improvements.

[0086] In this embodiment, Figure 5-Figure 7 As shown, two side ribs are arranged axially on the outer wall of the trunk, and the two side ribs are arranged symmetrically and extend to the main structure 100 to form a cross structure with the main structure 100. This design can improve the overall strength of the fir tree-shaped tooth group, making it more stable and reliable during use, and can maintain smooth installation during installation, and can ensure that the parts are not easily offset after installation.

[0087] The lower end of the main structure 100 is connected with a docking seat 800 for docking the cable tie. The cable tie can be conveniently connected to the staple through the docking seat 800, thereby realizing the fixing function of the cable tie.

[0088] In this embodiment, the main structure 100, the fir-tree-shaped tooth group, the side ribs, the buffer layer 200, and the docking seat 800 are all designed as an integrated molding. This design can simplify the production process, improve production efficiency, and ensure the connection strength and stability between the components.

[0089] In summary, the fir tree head clamp structure of Example 3 of the present invention combines the design features of Example 1 and Example 2, and makes some further optimizations and improvements. By providing components such as side ribs and a buffer layer, the fir tree head clamp structure of Example 3 of the present invention can adapt to mounting substrates 10 of different thicknesses and provide a stable clamping force. At the same time, the one-piece molding design also improves production efficiency and the connection strength between components.

[0090] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A fir tree head nail structure, comprising a main structure (100); and a fir tree-shaped tooth group arranged on the upper layer of the main structure (100), characterized in that: The fir-tree-shaped tooth group includes a trunk at a central position, and four layers of fir-tree-shaped tooth structures arranged on the periphery of the trunk and distributed along the axial direction; The four layers of the fir-tree-like tooth structure are, from bottom to top, fir-tree-like tooth shape one (300), fir-tree-like tooth shape two (400), fir-tree-like tooth shape three (500), and fir-tree-like tooth shape four (600), and the tooth pitch h1 between the fir-tree-like tooth shape one (300) and the fir-tree-like tooth shape two (400) is greater than the tooth pitch h2 between the fir-tree-like tooth shape two (400) and the fir-tree-like tooth shape three (500), and the tooth pitch h2 between the fir-tree-like tooth shape two (400) and the fir-tree-like tooth shape three (500) is equal to the tooth pitch h3 between the fir-tree-like tooth shape three (500) and the fir-tree-like tooth shape four (600).

2. A fir tree head staple structure as claimed in claim 1, characterized in that: The fir-tree-shaped tooth profile group is engaged with a mounting base plate (10) of different thicknesses, with at least the upper two layers of fir-tree-shaped teeth exposed.

3. A fir tree head staple structure as claimed in claim 1, characterized in that: Except for the topmost fir-tree-like tooth structure, the connection angles of the other fir-tree-like tooth structures to the trunk are the same, ranging from 25 to 70 degrees.

4. The fir tree head staple structure according to claim 1, characterized in that: The diameter of the fir-tree-like tooth-shaped structure in the uppermost layer is smaller than that of other fir-tree-like tooth-shaped structures in the lower layer, and except for the fir-tree-like tooth-shaped structures in the uppermost layer, the diameters of the fir-tree-like tooth-shaped structures in other layers are the same.

5. The fir tree head staple structure according to claim 1, characterized in that: The connection between the fir-tree-shaped tooth shape one (300), the fir-tree-shaped tooth shape three (500) and the fir-tree-shaped tooth shape four (600) and the trunk adopts an arc transition, and a lag connection is formed between the fir-tree-shaped tooth shape four (600) and the fir-tree-shaped tooth shape three (500).

6. A fir tree head staple structure as claimed in claim 4, characterized in that: The width of the trunk diameter H2 corresponding to the second fir-tree-shaped tooth shape (400) is greater than the width of the trunk diameter H1 corresponding to the first fir-tree-shaped tooth shape (300). The thickness of the second fir-tree-shaped tooth shape (400) is greater than the thickness of other fir-tree-shaped tooth shapes. The second fir-tree-shaped tooth shape (400) and the trunk are connected in a direct connection manner without an arc transition. This can shorten the width of the second fir-tree-shaped tooth shape (400) and improve the strength requirement. Because the second fir-tree-shaped tooth shape (400) contacts the thickest mounting substrate (10), it mainly bears the axial force in the direction of the trunk rather than the bending moment or shear force. This direct connection method is sufficient to meet the strength requirements.

7. The fir tree head staple structure according to claim 1, characterized in that: Two side ribs are axially arranged on the outer wall of the trunk portion, and the two side ribs are centrally symmetrically arranged. The two side ribs extend to the main structure (100) and form a cross structure with the main structure (100) to improve the overall strength.

8. The fir tree head staple structure according to claim 6, characterized in that: The main structure (100) is connected to a buffer layer (200) on the periphery thereof. The buffer layer (200) is in a trumpet-shaped structure with an opening facing upward, and the tooth pitch h0 between the first fir-tree-shaped tooth shape (300) and the buffer layer (200) is smaller than the tooth pitch h2 between the second fir-tree-shaped tooth shape (400) and the third fir-tree-shaped tooth shape (500) so as to adapt to the thinnest mounting substrate (10). The distance h0 is 0.05-0.1 of the height of the fir-tree head clamp structure, and the distance h1 is 0.3-0.5 of the height of the fir-tree head clamp structure.

9. The fir tree head staple structure according to claim 1, characterized in that: The lower end of the main structure (100) is connected to a docking seat (800) for docking with a cable tie.

10. The fir tree head staple structure according to claim 1, characterized in that: The main structure (100), the fir-tree-shaped tooth group, the side ribs, the buffer layer (200), and the docking seat (800) are designed to be integrally formed.

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