CN-224215181-U - Prevent fixed fracture structure and car light

CN224215181UCN 224215181 UCN224215181 UCN 224215181UCN-224215181-U

Abstract

The application belongs to a mechanical connecting structure and provides a fixing cracking prevention structure which comprises a body and an insert. The insert is inlaid on the body and forms exposed areas which are not covered by the body on the surfaces of the front side and the back side, the insert forms a through mounting hole in the exposed areas, and the ductility of the insert is superior to that of the body. Also provided is a vehicle lamp comprising the fixing cracking prevention structure. According to the application, the insert with ductility superior to that of the plastic body is inlaid on the body, and the exposed areas are formed on the front side and the back side, so that the high ductility of the insert can be utilized to preferentially generate elastic deformation in the nailing process to absorb impact energy, the phenomenon that the brittle plastic body directly bears concentrated stress to cause cracking is avoided, and meanwhile, the arrangement of the exposed areas ensures that nailing force directly acts on the insert instead of the plastic body, so that the technical problem that the traditional plastic part is easy to crack when the plastic body is light in weight is maintained.

Inventors

HUANG GAOFENG
LI RONGJIAN
LEI SHIWEI
QIN ZHONG
YU WENHAO
Lai Zupeng

Assignees

南宁燎旺车灯股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250606

Claims (10)

1. A fixing crack prevention structure, comprising: the body is a plastic material body; The insert is inlaid on the body, exposed areas which are not shielded by the body are formed on the surfaces of the front side and the back side of the insert, a through mounting hole is formed in the exposed areas of the insert, and the ductility of the insert is superior to that of the body.
2. The fixed crack prevention structure as claimed in claim 1, wherein: at least one side edge of the insert is serrated.
3. The fixed crack prevention structure as claimed in claim 2, wherein: The saw tooth shape of the insert formed at the edge thereof is symmetrical with respect to the geometric center of the mounting hole.
4. A fixed crack prevention structure as claimed in any one of claims 1 to 3, wherein: The body is integrally injection molded on the insert, and a through hole for filling the body is preset on the insert.
5. The fixed crack prevention structure as claimed in claim 4, wherein: The axial direction of the through hole is parallel to the mounting hole and is symmetrically arranged about the central axis of the mounting hole.
6. The fixed crack prevention structure as claimed in claim 1, wherein: The fixing crack prevention structure further includes an object for connection to the body; the object is provided with a convex column which can be abutted to the insert along the axial direction, the convex column is provided with a connecting hole for being abutted to the mounting hole, and the connecting hole and the convex column are coaxially arranged.
7. The fixed crack prevention structure as claimed in claim 6, wherein: and a through hole for the convex column to pass through in an adapting way so as to be abutted with the insert is formed on the body.
8. The fixed crack prevention structure as claimed in claim 6 or 7, wherein: and a plurality of protruding columns for abutting against the same insert are formed on the object.
9. The fixed crack prevention structure as claimed in claim 1, wherein: The insert is a metal material body with rust-proof property.
10. A vehicle lamp having the fixing crack preventing structure as claimed in any one of claims 1 to 9.

Description

Prevent fixed fracture structure and car light Technical Field The application belongs to the field of mechanical connection structures, and particularly relates to a fixing cracking prevention structure and a car lamp. Background In the connection of plastic parts, nailing (such as screws and rivets) is usually adopted for fixation. However, the brittleness of plastic materials is high, and the plastic materials are easy to crack due to stress concentration during nailing, especially in high-frequency vibration environments (such as car lights). In the prior art, the strength is improved by increasing the thickness of plastic or local reinforcing ribs, but the size is increased and the cracking problem cannot be fundamentally solved. Therefore, there is a need to solve the above-mentioned technical problems. Disclosure of utility model The embodiment of the application aims to provide a fixing cracking prevention structure and a car lamp, which are used for solving the technical problem that the car lamp is easy to crack by nailing in the prior art. In order to achieve the above purpose, the application adopts the following technical scheme: In one aspect, a fixed crack prevention structure is provided, including a body and an insert. The insert is inlaid on the body and forms exposed areas which are not covered by the body on the surfaces of the front side and the back side, the insert forms a through mounting hole in the exposed areas, and the ductility of the insert is superior to that of the body. Compared with the prior art, the fixing cracking prevention structure has the beneficial effects that the insert with ductility superior to that of the plastic body is inlaid on the body and exposed areas are formed on the front side and the back side of the insert, so that the high ductility of the insert can be utilized to preferentially generate elastic deformation in the nailing process to absorb impact energy, the brittle plastic body is prevented from being cracked due to direct bearing of concentrated stress, and meanwhile, the setting of the exposed areas ensures that nailing force directly acts on the insert instead of the plastic body, so that the technical problem that the nailing of the traditional plastic piece is easy to crack is effectively solved while the lightweight advantage of the plastic body is maintained, and the fixing structure is far superior to the prior art. Optionally, at least one side edge of the insert is serrated. According to the scheme, the sawtooth-shaped structure is arranged on the edge of at least one side of the insert, the contact area and the combination interface complexity of the insert and the plastic body can be greatly increased by utilizing the concave-convex shape of the sawtooth, so that the molten plastic can fully fill the sawtooth gap and form a mechanical interlocking structure when the plastic body is subjected to injection molding, when radial stress is generated in the nailing process, the geometrical characteristics of the sawtooth edge can decompose the concentrated stress into multidirectional dispersed stress, the linear transmission path of the stress in the plastic body is effectively restrained, and meanwhile, the meshing effect of the sawtooth can prevent relative displacement between the insert and the plastic body, so that the risk of cracking of the plastic body when nailing is further reduced. Optionally, the saw tooth shape of the insert formed at the edge thereof is symmetrical about the geometric center of the mounting hole. In the scheme, the sawtooth shape of the edge of the insert is arranged to be symmetrical about the geometric center of the mounting hole, so that local stress concentration caused by an asymmetric structure can be avoided, and the symmetrical sawtooth structure can ensure that plastic melt uniformly fills the edge of the insert from all directions during injection molding to form an balanced mechanical engagement effect, so that a weak bonding area caused by uneven filling is prevented, and the risk of cracking of a plastic body during nailing is further reduced. Optionally, the body is integrally injection molded on the insert, and a through hole for filling the body is preset on the insert. According to the scheme, the preset through hole on the insert can enable molten plastic to penetrate in an injection molding process and form a penetrating mechanical interlocking structure after cooling and solidifying, the structure enables the plastic body to form an anchoring point inside the insert, the bonding strength between the insert and the body is greatly improved, when nailing impact or vibration load is born, the plastic column in the through hole can effectively prevent relative displacement between the insert and the body, stress is uniformly transmitted to the whole plastic body through the three-dimensional network structure, and the plastic body cracking risk during nailing is further reduced. Optionally, the