Embedded nut and plastic component
By designing a flow groove structure for the embedded nut, the problems of unstable bonding force between the embedded nut and the plastic part and surface marks were solved, achieving a stable connection and aesthetic effect between the embedded nut and the plastic part.
Patent Information
- Application Number
- CN202520295803.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The existing embedded nut has an unstable bonding force with the plastic part, which makes the embedded nut easy to wobble when disassembling, and the plastic part has scratches on the surface, affecting its appearance.
Design an embedded nut comprising a body and a protrusion. The protrusion has a flow groove. Liquid plastic flows in the flow groove and hardens to form a fixed connection between the embedded nut and the plastic part. The flow grooves of the protrusion are inclined in opposite directions to enhance the resistance to torque. The uniformity of the bonding force is improved by gradually increasing the opening of the flow groove, and surface marks are reduced.
It improves the connection stability and aesthetics between the embedded nut and the plastic part, enhances the resistance to torque, and ensures the uniformity of the connection and the smoothness of the plastic part surface.
Smart Images
Figure CN223690145U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of nuts, in particular to an embedded nut and a plastic assembly. BACKGROUND
[0002] In order to connect a plastic part with other components, an embedded nut is usually installed on the plastic part, so that the plastic part is connected with other components in a detachable manner through the embedded nut. However, the thickness of the plastic part is relatively small, and the current combination between the embedded nut and the plastic part is unstable, so that the embedded nut is prone to shaking relative to the plastic part when being detached from other components. In addition, the surface of the plastic part around the embedded nut has marks, which reduces the aesthetic appearance of the plastic part. CONTENT OF THE UTILITY MODEL
[0003] In view of the above, it is necessary to provide an embedded nut and a plastic assembly to improve the aesthetic appearance of the plastic part and the stability of the connection between the embedded nut and the plastic part.
[0004] The application provides an embedded nut, which comprises:
[0005] A main body comprising a threaded part and an extension part connected with each other and provided with a threaded hole, the threaded hole penetrating through the threaded part and the extension part, one side of the threaded part away from the extension part forming a top surface, one side of the extension part away from the threaded part forming a bottom surface, and the cross section of the extension part gradually decreasing in the direction away from the threaded part, a side surface being formed between the top surface and the extension part;
[0006] Two convex bodies respectively annularly arranged on the side surface and spaced apart in the axial direction of the threaded hole, an annular groove being formed between the two convex bodies, flow grooves being formed in the surfaces of the two convex bodies away from the main body and communicating with the annular groove, the inclined directions of the flow grooves of the two convex bodies being opposite, and the openings of the flow grooves in the circumferential direction of the convex body gradually increasing in the direction away from the main body.
[0007] When the embedded nut is combined with the plastic part, the embedded nut is positioned in the forming cavity of the injection molding module, and then liquid plastic is injected into the forming cavity. In this process, the liquid plastic flows in the annular groove and the flow groove, and the plastic part formed after the liquid plastic hardens fills the annular groove and the flow groove, so as to realize the mutual embedding of the embedded nut and the plastic part. In the embedded nut, the inclined directions of the flow grooves of the two protrusions are opposite, which can enhance the anti-torque force of the embedded nut relative to the plastic part after the embedded nut is embedded in the plastic part. In addition, the opening of the flow groove in the circumferential direction of the protrusion gradually increases in the direction away from the main body, which is beneficial to the uniformity of the plastic part filling the flow groove, so as to improve the uniformity of the combined force of the embedded nut and the plastic part, thereby improving the stability of the connection between the embedded nut and the plastic part.
[0008] In some embodiments, a plurality of flow grooves are arranged on each protrusion, and the plurality of flow grooves are arranged equidistantly along the circumferential direction of the corresponding protrusion. The plurality of flow grooves of the two protrusions correspond one by one in the axial direction of the threaded hole.
[0009] In some embodiments, the flow groove penetrates through the opposite surfaces of the corresponding protrusion in the axial direction of the threaded hole. The flow groove of each protrusion includes a first side wall and a second side wall connected to each other, and a transition surface is formed between adjacent two flow grooves.
[0010] In some embodiments, the included angle between the first side wall and the second side wall is an acute angle.
[0011] In some embodiments, the included angles of the flow grooves of the two protrusions relative to the axial direction of the threaded hole are the same and are within the range of 30° and 60°.
[0012] In some embodiments, the threaded portion, the extension portion and the threaded hole are coaxially arranged.
[0013] In some embodiments, among the two protrusions, the protrusion away from the extension portion is a first protrusion, and the protrusion close to the extension portion is a second protrusion. The surface of the first protrusion away from the second protrusion is flush with the top surface, and the surface of the second protrusion away from the first protrusion is flush with the connecting surface of the threaded portion and the extension portion.
[0014] In some embodiments, the lengths of the two protrusions in the axial direction of the threaded hole are equal. The length of the extension portion in the axial direction of the threaded hole and the length of the annular groove in the axial direction of the threaded hole are both smaller than the length of the protrusion in the axial direction of the threaded hole.
[0015] In some embodiments, the main body and the two protrusions are an integral structure.
[0016] The embodiment of the present application further provides a plastic assembly, comprising:
[0017] A plastic part;
[0018] The embedded nut is embedded in the plastic part.
[0019] In the plastic assembly, the two protrusions of the embedded nut are opposite in the inclined direction of the flow groove, which can enhance the anti-torque force of the embedded nut relative to the plastic part after the embedded nut is embedded in the plastic part, and the opening of the flow groove in the circumferential direction of the protrusion gradually increases in the direction away from the main body, which is beneficial to the uniformity of the plastic part filling into the flow groove, so as to improve the uniformity of the bonding force between the embedded nut and the plastic part, thereby improving the structural stability of the plastic assembly. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 FIG. 1 is an exploded schematic view of a plastic assembly according to an embodiment of the present application.
[0021] Figure 2 FIG. 2 is a structural schematic view of an embedded nut according to an embodiment of the present application.
[0022] Figure 3 FIG. 3 is another angle of the structural schematic view of the embedded nut shown in FIG. 2. Figure 2 FIG. 4 is a cross-sectional view of the embedded nut shown in FIG. 2 along the A-A direction.
[0023] Figure 4 FIG. 5 is another angle of the structural schematic view of the embedded nut shown in FIG. 4. Figure 2 FIG. 6 is a cross-sectional view of the embedded nut shown in FIG. 4 along the B-B direction.
[0024] Main element symbol explanation: plastic assembly 1000, embedded nut 100, ring groove 100a, main body 110, top surface 110a, bottom surface 110b, side surface 110c, threaded hole 110d, threaded segment 110e, threaded part 111, extension part 112, protrusion 120, flow groove 120a, first side wall 120b, second side wall 120c, transition surface 120d, plastic part 200. DETAILED DESCRIPTION
[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0028] Please refer to Figure 1 , the present application provides a plastic assembly 1000, which comprises an embedded nut 100 and a plastic part 200, and the embedded nut 100 is embedded in the plastic part 200. Wherein, the plastic part 200 can be a middle frame structure of a mobile phone, a tablet computer or the like. Exemplarily, the plastic assembly 1000 comprises four embedded nuts 100, the plastic part 200 is substantially a square ring structure, the four embedded nuts 100 are respectively embedded at four end corners of the plastic part 200, and the plastic part 200 is detachably connected with external components through the four embedded nuts 100.
[0029] Please refer to Figure 2 , Figure 3 and Figure 4 , the embedded nut 100 comprises a main body 110 and two protrusions 120. The main body 110 comprises a threaded portion 111 and an extension portion 112 which are coaxial and connected, a threaded hole 110d penetrates through the threaded portion 111 and the extension portion 112, a top surface 110a is formed on the side of the threaded portion 111 away from the extension portion 112, a bottom surface 110b is formed on the side of the extension portion 112 away from the threaded portion 111, the cross section of the extension portion 112 gradually decreases in the direction away from the threaded portion 111, and a side surface 110c is formed between the top surface 110a and the extension portion 112. The two protrusions 120 are respectively annularly arranged on the side surface 110c and are spaced apart along the axial direction of the threaded hole 110d, and a ring groove 100a is formed between the two protrusions 120. The surface of each of the two protrusions 120 away from the main body 110 is provided with a flow groove 120a which communicates with the ring groove 100a, the inclination directions of the flow grooves 120a of the two protrusions 120 are opposite, and the openings of the flow grooves 120a in the circumferential direction of the protrusions 120 gradually increase in the direction away from the main body 110. In the present embodiment, the main body 110 and the protrusions 120 are substantially cylindrical structures.
[0030] When the embedded nut 100 is combined with the plastic part 200, the embedded nut 100 is first positioned in a forming cavity of an injection molding module, and then liquid plastic is injected into the forming cavity. In this process, the liquid plastic flows in the annular groove 100a and the flow groove 120a, and the plastic part 200 formed after the liquid plastic hardens fills the annular groove 100a and the flow groove 120a, so that the embedded nut 100 and the plastic part 200 are embedded with each other, and the embedded nut 100 and the plastic part 200 are fixedly connected.
[0031] It should be noted that the top surface 110a of the embedded nut 100 after being fixed can be flush with the surface of the plastic part 200 or can be set in a staggered manner based on actual setting requirements.
[0032] Please refer to Figure 2 In some embodiments, each convex body 120 is provided with a plurality of flow grooves 120a, the plurality of flow grooves 120a are equidistantly arranged along the circumference of the corresponding convex body 120, and the plurality of flow grooves 120a of the two convex bodies 120 correspond one by one in the axial direction of the threaded hole 110d.
[0033] Therefore, the plurality of flow grooves 120a of each convex body 120 can increase the connection force between the convex body 120 and the plastic part 200, and in addition, the plurality of flow grooves 120a are equidistantly arranged along the circumference of the convex body 120, which is beneficial to realize the uniform distribution of the connection force between the convex body 120 and the plastic part 200.
[0034] Please refer to Figure 2 In some embodiments, the flow groove 120a penetrates through the opposite two surfaces of the corresponding convex body 120 in the axial direction a of the threaded hole 110d, the flow groove 120a of the two convex bodies 120 includes a first side wall 120b and a second side wall 120c connected with each other, and a transition surface 120d is formed between the two adjacent flow grooves 120a.
[0035] Therefore, the flow groove 120a is roughly V-shaped through the first side wall 120b and the second side wall 120c, which is beneficial to the fullness of the plastic part 200 filling the flow groove 120a, so as to improve the connection strength between the embedded nut 100 and the plastic part 200.
[0036] In some embodiments, the included angle of the first side wall 120b and the second side wall 120c is an acute angle.
[0037] Therefore, the first side wall 120b and the second side wall 120c in the acute angle structure can ensure the strength of the convex body 120 itself, and avoid the fracture of the convex body 120 when the embedded nut 100 is connected with the external part.
[0038] In the embodiment, the included angle of the first side wall 120b and the second side wall 120c varies along the axial direction a of the threaded hole 110d, so as to further improve the strength of the convex body 120 itself.
[0039] In some embodiments, the included angle of the flow grooves 120a of the two convex bodies 120 relative to the axial direction a of the threaded hole 110d is the same and ranges between 30° and 60°. For example, the included angle of the flow grooves 120a relative to the axial direction a of the threaded hole 110d can be 30°, 35°, 40°, 45°, 50°, 55°, or 60°.
[0040] Therefore, by reasonably configuring the included angle of the flow grooves 120a relative to the axial direction a of the threaded hole 110d, the strength of the convex body 120 and the connection strength between the embedded nut 100 and the plastic part 200 can be satisfied at the same time. Specifically, if the included angle of the flow grooves 120a relative to the axial direction a of the threaded hole 110d is less than 30°, the volume of the plastic part 200 filled in the flow grooves 120a decreases, and the connection strength between the embedded nut 100 and the plastic part 200 decreases. If the included angle of the flow grooves 120a relative to the axial direction a of the threaded hole 110d is greater than 60°, the strength of the convex body 120 decreases.
[0041] Please refer to Figure 2 and Figure 3 In some embodiments, the threaded part 111, the extension part 112, and the threaded hole 110d are coaxially arranged.
[0042] Therefore, the coaxial arrangement of the threaded part 111, the extension part 112, and the threaded hole 110d can improve the structural stability of the embedded nut 100.
[0043] In some embodiments, of the two convex bodies 120, the convex body 120 away from the extension part 112 is a first convex body, and the convex body 120 close to the extension part 112 is a second convex body. The surface of the first convex body away from the second convex body is flush with the top surface 110a, and the surface of the second convex body away from the first convex body is flush with the connecting surface of the threaded part 111 and the extension part 112.
[0044] Therefore, by the above arrangement, the connection strength of the main body 110 and the two convex bodies 120 can be improved.
[0045] Please refer to Figure 3 and Figure 4In some embodiments, the two protrusions 120 have equal length along the axial direction a of the threaded hole 110d, and the length of the extension 112 along the axial direction a of the threaded hole 110d and the length of the annular groove 100a along the axial direction a of the threaded hole 110d are all less than the length of the protrusions 120 along the axial direction a of the threaded hole 110d.
[0046] Therefore, by the above arrangement, the sufficient connection strength between the plastic part 200 and the protrusions 120 is facilitated to ensure the stability of the connection between the embedded nut 100 and the plastic part 200.
[0047] Please refer to Figure 4 In the embodiment, the threaded section 110e of the threaded hole 110d is arranged only on the inner wall of the threaded portion 111.
[0048] In some embodiments, the main body 110 and the two protrusions 120 are of an integral structure.
[0049] Therefore, the integral structure of the main body 110 and the two protrusions 120 can simplify the processing technology of the embedded nut 100, and facilitate the reduction of the manufacturing cost of the embedded nut 100.
[0050] In the above-mentioned embedded nut 100 and plastic assembly 1000, the two protrusions 120 of the embedded nut 100 have opposite inclined directions of the flow grooves 120a, which can enhance the anti-torque force of the embedded nut 100 relative to the plastic part 200 after the embedded nut 100 is embedded in the plastic part 200, and the opening of the flow grooves 120a in the circumferential direction of the protrusions 120 gradually increases in the direction away from the main body 110, which facilitates the uniformity of the plastic part 200 filled into the flow grooves 120a, so as to improve the uniformity of the bonding force between the embedded nut 100 and the plastic part 200, thereby improving the stability of the connection between the embedded nut 100 and the plastic part 200. In addition, the extension 112 can also guide the liquid plastic to flow into the flow grooves 120a during the molding process of the plastic part 200, so that the liquid plastic flows uniformly between the flow grooves 120a and the annular groove 100a, thereby reducing the marks on the surface of the plastic part, and facilitating the improvement of the aesthetic appearance of the plastic part.
[0051] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the claims are intended to be embraced therein.
[0052] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. An embedded nut, characterized in that, include: The main body includes a threaded portion and an extension portion connected together and has a threaded hole. The threaded hole passes through the threaded portion and the extension portion. The side of the threaded portion away from the extension portion forms a top surface, and the side of the extension portion away from the threaded portion forms a bottom surface. The cross-section of the extension portion gradually decreases in the direction away from the threaded portion, and a side surface is formed between the top surface and the extension portion. Two protrusions are respectively arranged around the side and spaced apart along the axial direction of the threaded hole. An annular groove is formed between the two protrusions. A flow groove communicating with the annular groove is opened on the surface of the two protrusions away from the main body. The inclination directions of the flow grooves of the two protrusions are opposite, and the opening of the flow groove in the circumferential direction of the protrusion gradually increases in the direction away from the main body.
2. The insert nut of claim 1 wherein, Each of the protrusions is provided with a plurality of flow grooves, which are equally spaced along the circumference of the corresponding protrusion, and the plurality of flow grooves of two protrusions correspond one-to-one in the axial direction of the threaded hole.
3. The insert nut of claim 1 wherein, The flow groove penetrates the corresponding protrusion on both opposite sides of the threaded hole in the axial direction. The flow grooves of the two protrusions each include a first sidewall and a second sidewall connected to each other, and a transition surface is formed between two adjacent flow grooves.
4. The embedded nut of claim 3, wherein, The angle between the first sidewall and the second sidewall is an acute angle.
5. The insert nut of claim 1 wherein, The flow grooves of the two protrusions have the same included angle relative to the axial direction of the threaded hole, and the included angle range is between 30° and 60°.
6. The insert nut of claim 1 wherein, The threaded portion, the extension portion, and the threaded hole are coaxially arranged with each other.
7. The embedded nut of claim 6, wherein, Of the two protrusions, the protrusion farther from the extension is the first protrusion, and the protrusion closer to the extension is the second protrusion. The surface of the first protrusion facing away from the second protrusion is flush with the top surface, and the surface of the second protrusion facing away from the first protrusion is flush with the connecting surface of the threaded portion and the extension.
8. The embedded nut of claim 6, wherein, The two protrusions have equal lengths along the axial direction of the threaded hole, and the lengths of the extension and the annular groove along the axial direction of the threaded hole are both less than the lengths of the protrusions along the axial direction of the threaded hole.
9. The insert nut of claim 1 wherein, The main body and the two protrusions are an integral structure.
10. A plastic assembly, characterized by include: Plastic parts; The embedded nut as described in any one of claims 1 to 9, wherein the embedded nut is embedded in the plastic part.