Anti-loosening nut and plastic part
By setting an annular boss and an inclined pattern on the nut body to prevent loosening, the problem of glue overflow and loosening of nuts in plastic parts is solved, and the connection stability and torque resistance of the nut are enhanced.
Patent Information
- Application Number
- CN202520546367.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-26
AI Technical Summary
In the prior art, nuts in plastic parts are prone to glue overflow and loosening.
Design an anti-loosening nut, including a nut body, an annular boss and internal toothed teeth. The annular boss has external patterns with opposite inclination directions, and the internal toothed teeth are inclined along the nut axis. The nut body has anti-overflow grooves to prevent plastic material from overflowing, and the inclined patterns enhance the pull-out force.
It effectively prevents glue overflow from the nut hole, enhances the torque and pull-out force of the nut, reduces the possibility of nut fatigue failure, and achieves the effects of preventing glue overflow and loosening.
Smart Images
Figure CN223708256U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of fasteners, and more particularly to a kind of anti-loose nut and plastic parts. BACKGROUND
[0002] In the existing plastic parts product components, many need to melt the nut in the plastic part, that is, the nut is integrally injection molded with the plastic part, the periphery of the nut is thermally fused with the plastic part, and then the screw hole of the nut is connected with other matched screws to realize the connection of the plastic part with other matched components. However, in the existing production process, since the ordinary nut is usually used, when the nut is thermally fused to the plastic part, the plastic raw material is easy to overflow into the screw hole of the nut, causing the screw hole to be blocked and unable to be connected with the screw, and the connection between the nut and the plastic part is not tight enough, which is easy to cause the nut to loosen. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the embodiment of the present application is to provide an anti-loose nut to solve the technical problem that the nut is easy to overflow and loosen in the plastic part in the prior art.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide an anti-loose nut, which is integrally injection molded and thermally fused in a plastic part. The anti-loose nut comprises:
[0005] a nut body provided with a threaded hole penetrating through the nut body in the axial direction;
[0006] a plurality of annular bosses protruding on the outer ring surface of the nut body, the plurality of annular bosses being coaxially arranged with the nut body and being spaced apart along the axial direction of the nut body; a first anti-glue overflow groove in the form of a ring is formed between the outer ring surface of the nut body and any two adjacent annular bosses, and a second anti-glue overflow groove in the form of a ring is formed between the outer ring surface of the nut body and the annular boss adjacent to the lower end of the nut body; the outer ring surface of the annular boss is provided with an outer pattern inclined relative to the axial direction of the nut body, and the inclined directions of the outer patterns on the two adjacent annular bosses are opposite; and
[0007] an inner tooth gear provided on the inner wall surface of the threaded hole, the inner tooth gear being inclined along the axial direction of the nut body.
[0008] Optionally, the inner tooth gear is inclined towards the upper end of the nut body, the inner tooth gear comprises an upper inclined surface facing the upper end of the nut body and a lower inclined surface facing the lower end of the nut body, the angle between the lower inclined surface and the axial direction of the nut body is a lower inclined angle, and the angle between the upper inclined surface and the axial direction of the nut body is an upper inclined angle, the angle of the lower inclined angle being smaller than the angle of the upper inclined angle.
[0009] The inner toothed gear comprises an upper ring of teeth adjacent to the upper end of the nut body, a lower ring of teeth adjacent to the lower end of the nut body, and a plurality of rings of middle teeth between the upper and lower rings of teeth.
[0010] Optionally, the lower inclined angle is 20-40 degrees.
[0011] The included angle between the upper inclined surface and the lower inclined surface of the upper ring of teeth is α1, and the included angle between the upper inclined surface of the upper ring of teeth and the upper end surface of the nut body is α2; α1 is 120°±10°, and α2 is 60°±10°.
[0012] The middle teeth have a middle tooth surface parallel to the axial direction of the nut body, the upper inclined surface and the lower inclined surface of the middle teeth are connected by the middle tooth surface, the included angle between the upper inclined surface of the first ring of middle teeth adjacent to the upper ring of teeth and the upper end surface of the nut body is α3, the included angle between the upper inclined surface and the lower inclined surface of the same ring of middle teeth is α4, the included angle between the upper inclined surface of the middle teeth and the lower inclined surface of the adjacent upper ring of middle teeth is α5, and the included angle between the lower inclined surface of the last ring of middle teeth adjacent to the lower ring of teeth and the lower end surface of the nut body is α6; α3 is 30°±10°, α4 is 90°±10°, α5 is 90°±10°, and α6 is 60°±10°.
[0013] The included angle between the upper inclined surface and the lower inclined surface of the lower ring of teeth is α7, and the included angle between the lower inclined surface of the lower ring of teeth and the lower end surface of the nut body is α8; α7 is 75°±10°, and α8 is 45°±10°.
[0014] Optionally, the outer pattern is formed by a plurality of straight convex strips arranged along the circumferential direction of the annular boss, and the outer patterns on two adjacent annular bosses form herringbone patterns due to the opposite inclined directions.
[0015] Optionally, two annular bosses are arranged on the outer surface of the nut body, one annular boss is arranged at the upper end of the nut body, and the other annular boss is arranged adjacent to the lower end of the nut body; a first glue overflow prevention groove is formed between the two annular bosses and the outer surface of the nut body, and a second glue overflow prevention groove is formed between the annular boss adjacent to the lower end of the nut body and the outer surface of the nut body; or,
[0016] Two annular bosses are arranged on the outer surface of the nut body, one annular boss is arranged at the upper end of the nut body, and the other annular boss is arranged at the lower end of the nut body; a first glue overflow prevention groove is formed between the two annular bosses and the outer surface of the nut body.
[0017] Optionally, in the axial direction of the nut body, the width of the first glue overflow prevention groove and the width of the second glue overflow prevention groove are less than 1 / 2 of the width of the outer pattern; or,
[0018] The width of the first anti-glue overflow groove is greater than 3 times the outer pattern width and less than 5 times the outer pattern width in the axial direction of the nut body.
[0019] Optionally, the anti-loose nut is made of carbon steel or copper.
[0020] The application also provides a plastic part comprising the anti-loose nut.
[0021] The anti-loose nut has the following advantages: first, a plurality of annular bosses are arranged on the outer ring surface of the nut body, and the first anti-glue overflow groove is formed between the annular boss and the outer ring surface of the nut body, so that when the anti-loose nut is hot-melted in the plastic part, the plastic material will enter the first anti-glue overflow groove and will not overflow into the threaded hole, thereby effectively solving the problem of glue overflow in the nut hole. Meanwhile, the outer pattern with opposite inclined directions is arranged on the outer ring surface of the annular boss, so that when the anti-loose nut is hot-melted in the injection-molded part, the anti-loose nut will be subjected to resistance in two opposite directions, so as to enhance the torque and pulling force of the anti-loose nut. The inner tooth gear is arranged to be inclined along the axial direction of the nut body, so that the inner tooth gear has a certain bevel angle, thereby playing a loosening function and further reducing the possibility of nut fatigue failure. In summary, the anti-loose nut has the advantages of anti-glue overflow and anti-loose through multiple structural improvements. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0023] Figure 1 The structure schematic diagram of the anti-loose nut provided by an embodiment of the application is shown in the figure;
[0024] Figure 2 The side view of the anti-loose nut provided by an embodiment of the application is shown in the figure;
[0025] Figure 3 The Figure 2 The sectional view along the S-S direction in the figure;
[0026] Figure 4 The Figure 3 The enlarged schematic view of the A part in the figure;
[0027] Figure 5 The structure schematic diagram of the plastic part provided by an embodiment of the application is shown in the figure, which is assembled with the anti-loose nut and the screw;
[0028] Figure 6A front view of a plastic part assembled with a lock nut and screw according to an embodiment of the present application;
[0029] Figure 7 A front view of a plastic part assembled with a lock nut and screw according to another embodiment of the present application; Figure 6 A sectional view along the direction of B-B;
[0030] Figure 8 A sectional view of a lock nut according to another embodiment of the present application.
[0031] BRIEF DESCRIPTION OF DRAWINGS
[0032] Reference Name Reference Name 100 Nut body 200 Annular boss 300 Internal spline 110 Threaded hole 210 First anti-glue groove 220 Second anti-glue groove 230 Outer pattern 310 Lower inclined surface 320 Upper inclined surface 400 Plastic part 500 Screw 600 Lock nut 330 Upper spline 340 Lower spline 350 Middle spline 360 Middle tooth surface DETAILED DESCRIPTION
[0033] In order to make the technical problems solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.
[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0035] It should also be noted that the left, right, up and down orientation terms in the embodiments of the present application are only relative concepts or are referenced to the normal use state of the product, and should not be considered as limiting.
[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0037] In addition, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0038] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0039] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0040] The embodiments of the present application provide a locking nut.
[0041] Referring to Figures 1 to 7 In an embodiment, the locking nut 600 is integrally injection molded and hot melted in the plastic part 400, which specifically includes a nut body 100, a plurality of annular bosses 200, and an internal toothed gear 300, etc. The nut body 100 is provided with a threaded hole 110 penetrating through the nut body 100 in the axial direction. The plurality of annular bosses 200 are protruded on the outer ring surface of the nut body 100, and the plurality of annular bosses 200 are coaxially arranged with the nut body 100 and are spaced apart along the axial direction of the nut body 100; the annular bosses 200 between the adjacent two annular bosses 200 and the outer ring surface of the nut body 100 form a first anti-glue overflow groove 210, and the annular boss 200 adjacent to the lower end of the nut body 100 and the outer ring surface of the nut body 100 form a second anti-glue overflow groove 220; the outer ring surface of the annular boss 200 is provided with an outer pattern 230 inclined to the axial direction of the nut body 100, and the inclined directions of the outer patterns 230 on the adjacent two annular bosses 200 are opposite. The internal toothed gear 300 is arranged on the inner wall surface of the threaded hole 110, and the internal toothed gear 300 is arranged in an inclined manner along the axial direction of the nut body 100. In addition, as shown in the figure, in an embodiment, the locking nut 600 is fixed in the long strip-shaped plastic part 400 by a hot melting method, and then the screw 500 is inserted into the threaded hole 110 of the locking nut 600 to realize the connection. Figures 5 to 7
[0042] Based on the structure design, in the embodiment, firstly, a plurality of annular bosses 200 are arranged on the outer ring surface of the nut body 100, and a first glue overflow prevention groove 210 is formed between the annular boss 200 and the outer ring surface of the nut body 100. In this way, when the anti-loose nut 600 is hot-melted in the plastic part 400, the plastic material will enter the first glue overflow prevention groove 210 and will not overflow into the threaded hole 110, thereby effectively solving the problem of glue overflow in the nut hole. At the same time, the outer pattern 230 with opposite inclined directions is arranged on the outer ring surface of the annular boss 200, so that when the anti-loose nut 600 hot-melted in the injection molding part is pulled, it will be subjected to resistance in two opposite directions, thereby enhancing the torque and pulling force of the anti-loose nut 600. The inner tooth gear 300 is arranged to be inclined along the axial direction of the nut body 100, so that the inner tooth gear 300 has a certain inclination angle, thereby achieving the function of loosening, and further reducing the possibility of nut fatigue failure. In summary, the anti-loose nut 600 has the advantages of preventing glue overflow and anti-loose through various structural improvements.
[0043] Further, as shown in Figure 3 and Figure 4 , in the embodiment, the inner tooth gear 300 is arranged to be inclined towards the upper end of the nut body 100. The inner tooth gear 300 includes an upper inclined surface 320 facing the upper end of the nut body 100 and a lower inclined surface 310 facing the lower end of the nut body 100. The inclination angle between the lower inclined surface 310 and the axial direction of the nut body 100 is a lower inclination angle, and the inclination angle between the upper inclined surface 320 and the axial direction of the nut body 100 is an upper inclination angle. The angle of the lower inclination angle is smaller than the angle of the upper inclination angle. Here, the inclination angle of the upper inclination angle is usually set as the inner tooth angle of a conventional nut, which is generally 45 degrees, but the angle of the lower inclination angle should be less than 45 degrees. It should be noted that in order to match the installation mode and structure design of the conventional screw 500, the inner tooth gear 300 is preferably arranged to be inclined towards the upper end of the nut body 100, but in other embodiments, it can also be inclined towards the lower end according to different screw 500 installation modes, which is not particularly limited here.
[0044] In order to achieve better anti-loose effect, the inclination angle of the lower inclination angle is preferably 20 to 40 degrees. As shown in Figure 3 and Figure 4 , in the embodiment, the lower inclination angle is 30 degrees, so that the optimal loosening function can be obtained, and the possibility of fatigue failure is further reduced. Further, as shown in Figure 8In another embodiment shown, the internal tooth pattern 300 includes an upper tooth pattern 330 near the upper end of the nut body 100, a lower tooth pattern 340 near the lower end of the nut body 100, and multiple middle teeth pattern 350 located between the upper tooth pattern 330 and the lower tooth pattern 340. The included angle formed between the upper inclined surface 320 and the lower inclined surface 310 of the upper tooth pattern 330 is α1, and the included angle between the upper inclined surface 320 of the upper tooth pattern 330 and the upper end face of the nut body 100 is α2; α1 is 120°±10°, and α2 is 60°±10°. The center tooth 350 has a center tooth surface 360 parallel to the axial direction of the nut body 100. The upper inclined surface 320 and the lower inclined surface 310 of the center tooth 350 are connected through the center tooth surface 360. The angle between the upper inclined surface 320 of the first ring of center teeth 350 adjacent to the upper tooth 330 and the upper end face of the nut body 100 is α3. The angle between the upper inclined surface 320 and the lower inclined surface 310 of the same ring of center teeth 350 is α4. The angle between the upper inclined surface 320 of the center tooth 350 and the lower inclined surface 310 of the adjacent previous ring of center teeth 350 is α4. The angle between the lower bevel surface 320 of the last ring of the lower spline 350 adjacent to the lower spline 340 and the lower end face of the nut body 100 is α6, α3 is 30°±10°, α4 is 90°±10°, α5 is 90°±10°, and α6 is 60°±10°; the angle between the upper bevel surface 320 and the lower bevel surface 310 of the lower spline 340 is α7, and the angle between the lower bevel surface 310 of the lower spline 340 and the lower end face of the nut body 100 is α8; α7 is 75°±10°, and α8 is 45°±10°. The above is the preferred angle design of the internal spline 300 of this anti-loosening nut 600, which can further improve the anti-loosening effect.
[0045] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, the outer pattern 230 is formed by multiple straight raised strips arranged at intervals along the circumference of the annular boss 200. The outer patterns 230 on two adjacent annular bosses 200 form a herringbone pattern due to opposite inclination directions. Of course, in other embodiments, the outer pattern 230 can also be other pattern forms, as long as the inclination directions of the two outer patterns 230 are opposite. However, in this embodiment, the herringbone pattern design is simpler, easier to manufacture, and has a better effect on enhancing torque and pull-out force. Specifically, in this example, when the anti-loosening nut 600 is heat-melted into the plastic part 400, its torque is ≥1.2 kgf and its pull-out force is ≥10 kgf.
[0046] Specifically, such as Figures 1 to 4As shown, in the present embodiment, two annular bosses 200 are arranged on the outer circumferential surface of the nut body 100, one annular boss 200 is arranged at the upper end of the nut body 100, and the other annular boss 200 is arranged near the lower end of the nut body 100. In other words, in the present embodiment, the two annular bosses 200 form a first glue overflow prevention groove 210 and a second glue overflow prevention groove 220, that is, a H-shaped groove structure is formed to solve the problem of glue overflow in the nut hole. At the same time, after the plastic raw material enters the H-shaped groove structure, the torque resistance and the drawing force of the nut can be further enhanced. However, the design is not limited to this, and in other embodiments, the number of annular bosses 200 can be greater than two, and the number of glue overflow prevention grooves can also be greater than two. However, the design of the present embodiment can balance the effects of the H-shaped pattern on torque and drawing force and the effect of preventing glue overflow.
[0047] In addition, in another embodiment, according to different plastic part conditions, the anti-loose nut 600 can also have other structure designs. For example, two annular bosses 200 are arranged on the outer circumferential surface of the nut body 100, one annular boss 200 is arranged at the upper end of the nut body 100, and the other annular boss 200 is arranged at the lower end of the nut body 100; the two annular bosses 200 and the outer circumferential surface of the nut body 100 form a first glue overflow prevention groove 210. In other words, the two annular bosses 200 form a first glue overflow prevention groove 210, that is, a H-shaped groove structure is formed to also solve the problem of glue overflow.
[0048] Further, in the present embodiment, in the axial direction of the nut body 100, the width of the first glue overflow prevention groove 210 and the width of the second glue overflow prevention groove 220 are preferably less than 1 / 2 of the width of the outer pattern 230. It can be understood that since the axial width of the nut, that is, the length of the nut, is fixed, too many annular bosses 200 will cause the width of the outer pattern 230 to be too small, and the width of the glue overflow prevention groove will also be too small, thereby adversely affecting the enhancement of torque and drawing force. The design in the present embodiment can balance the two, thereby achieving better effects of enhancing torque and drawing force. Of course, if the number of glue overflow prevention grooves is too small or the width is too small, the glue overflow prevention performance will also be poor.
[0049] In addition, in the embodiment, according to the conditions of different plastic parts to be assembled, the first glue overflow prevention groove 210 of the anti-loose nut 600 can also have other settings. For example, in the axial direction of the nut body 100, the width of the first glue overflow prevention groove 210 is greater than 3 times the width of the outer pattern 230 and less than 5 times the width of the outer pattern 300. At this time, the first glue overflow prevention groove 210 is set to be wider, which can better increase the glue overflow prevention function.
[0050] It should be noted that in the present embodiment, the anti-loose nut 600 is preferably made of carbon steel. Of course, in other embodiments, the anti-loose nut 600 can also be made of other materials, such as but not limited to brass, etc. However, in the present embodiment, the nut is made of carbon steel because the hardness of carbon steel is relatively high, which is beneficial to improve the anti-loose performance of the anti-loose nut 600.
[0051] The present application also proposes a plastic part 400, which comprises the aforementioned anti-loose nut 600. In an embodiment, as shown in Figures 5 to 7 the above figures show the anti-loose nut 600 assembled on the plastic part 400. The specific structure of the anti-loose nut 600 is referred to the above embodiments. Since the plastic part 400 adopts all the technical solutions of the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0052] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A locking nut, integrally injection molded and heat staked in a plastic member, characterized in that, The anti-loose nut comprises: a nut body provided with a threaded hole penetrating through the nut body in an axial direction; a plurality of annular bosses protruding from an outer surface of the nut body, the annular bosses being coaxial with the nut body and being spaced apart along the axial direction of the nut body, and a first anti-glue leakage groove being formed between adjacent annular bosses and the outer surface of the nut body; an inner toothed gear provided on an inner wall surface of the threaded hole, the inner toothed gear being inclined along the axial direction of the nut body.
2. The locking nut of claim 1 wherein, The inner toothed gear is inclined towards an upper end of the nut body, and the inner toothed gear comprises an upper inclined surface facing the upper end of the nut body and a lower inclined surface facing a lower end of the nut body, and an angle between the lower inclined surface and the axial direction of the nut body is a lower inclined angle, and the angle of the lower inclined angle is smaller than an angle of an upper inclined angle. The inner toothed gear comprises an upper ring of upper toothed gears adjacent to the upper end of the nut body, a lower ring of lower toothed gears adjacent to the lower end of the nut body, and a plurality of rings of middle toothed gears between the upper toothed gears and the lower toothed gears.
3. The tamper-proof nut of claim 2 wherein, The lower inclined angle is 20 to 40 degrees. An included angle between the upper inclined surface and the lower inclined surface of the upper toothed gear is α1, and an included angle between the upper inclined surface of the upper toothed gear and the upper end surface of the nut body is α2; α1 is 120°±10°, and α2 is 60°±10°. The middle toothed gear has a middle tooth surface parallel to the axial direction of the nut body, the upper inclined surface and the lower inclined surface of the middle toothed gear are connected through the middle tooth surface, an included angle between the upper inclined surface of the first ring of the middle toothed gears adjacent to the upper toothed gear and the upper end surface of the nut body is α3, an included angle between the upper inclined surface and the lower inclined surface of the same ring of the middle toothed gears is α4, an included angle between the upper inclined surface of the middle toothed gear and the lower inclined surface of the adjacent upper ring of the middle toothed gears is α5, and an included angle between the lower inclined surface of the last ring of the middle toothed gears adjacent to the lower toothed gear and the lower end surface of the nut body is α6; α3 is 30°±10°, α4 is 90°±10°, α5 is 90°±10°, and α6 is 60°±10°. An included angle between the upper inclined surface and the lower inclined surface of the lower toothed gear is α7, and an included angle between the lower inclined surface of the lower toothed gear and the lower end surface of the nut body is α8; α7 is 75°±10°, and α8 is 45°±10°.
4. The tamper-proof nut of claim 2 wherein, The outer pattern is formed by a plurality of linear protrusions arranged along the circumferential direction of the annular boss, and the outer patterns on adjacent annular bosses form a herringbone pattern due to the opposite inclined directions.
5. A captive nut as claimed in any one of claims 1 to 4, wherein, Two annular protrusions are arranged on the outer ring surface of the nut body, one of which is arranged at the upper end of the nut body, and the other is arranged near the lower end of the nut body, and the first anti-glue overflow groove is formed between the two annular protrusions and the outer ring surface of the nut body, and the second anti-glue overflow groove is formed between the annular protrusion near the lower end of the nut body and the outer ring surface of the nut body; or, Two annular protrusions are arranged on the outer ring surface of the nut body, one of which is arranged at the upper end of the nut body, and the other is arranged at the lower end of the nut body, and the first anti-glue overflow groove is formed between the two annular protrusions and the outer ring surface of the nut body.
6. The tamper-proof nut of claim 5 wherein, In the axial direction of the nut body, the width of the first anti-glue overflow groove and the width of the second anti-glue overflow groove are less than 1 / 2 of the outer pattern width; or, In the axial direction of the nut body, the width of the first anti-glue overflow groove is greater than 3 times the outer pattern width and less than 5 times the outer pattern width.
7. The tamper-proof nut, as recited in claim 1, wherein The anti-loose nut is made of carbon steel or copper.
8. A plastic part, characterized by The anti-loose nut according to any one of claims 1 to 7.