Electric connector
By using secondary injection molding of the insulating body and metal shell and a bracket design, the problems of difficult plugging and unplugging and insufficient durability of traditional USB Type-C electrical connectors are solved, achieving good plugging and unplugging feel and durability, while also enhancing waterproof performance.
Patent Information
- Application Number
- CN202422816641.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Traditional USB Type-C electrical connectors suffer from electromagnetic compatibility issues during insertion and removal, leading to difficulties in insertion and removal and insufficient durability.
The design employs a two-stage injection molding process involving an insulating body and a metal shell to bridge the stepped differences. By adding protrusions to the stepped sections to make them flush with the outer surface of the inner shell, a smooth transition is achieved. This, combined with the design of a metal bracket and a waterproof ring, enhances stability and waterproof performance.
It achieves a good insertion and removal feel and insertion and removal durability, ensures smoother insertion and removal, and improves the waterproof performance of electrical connectors.
Smart Images
Figure CN223471796U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric connectors, in particular to an electric connector with stable plugging and unplugging. Background Art
[0002] Nowadays, electronic devices connect to computers through a variety of electrical connectors to transfer data. Universal Serial Bus (USB) connectors, with their high transmission speeds, are widely used. USB Type-C, designed based on the USB 3.1 specification, features a slimmer design, faster transmission speeds, more robust power transmission, and supports double-sided insertion. Traditional USB Type-C products currently have a step difference between the inner metal housing and the injection-molded insulating body. This can cause electromagnetic compatibility (EMC) issues during the plugging and unplugging process, impacting the plugging and unplugging feel and the product's durability.
[0003] Therefore, it is hoped to provide a new electrical connector to overcome the above-mentioned defects. Utility Model Content
[0004] The purpose of the utility model is to provide an electrical connector, which has a good plugging and unplugging feel and a durable plugging and unplugging life.
[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an electrical connector comprising an insulating body extending longitudinally, a plurality of conductive terminals retained on the insulating body, and a metal shell sleeved on the outer side of the insulating body, the insulating body having a base, a step extending forward from the base, and a tongue extending forward from the step, the conductive terminals being at least partially exposed on the surface of the tongue. The metal shell has an annular rear end wall abutting against the front end face of the base, and an inner shell formed by drawing forward from the inner edge of the rear end wall, the inner shell covering the outer surface of the step, the step having a protrusion extending outward from the front end, the protrusion being located in front of the inner shell, and the outer surface of the protrusion being flush with the outer wall surface of the inner shell.
[0006] In a preferred embodiment, the conductive terminal is injection molded into the insulating body in one step, and the inner shell is injection molded on the step portion of the insulating body in a second step.
[0007] In a preferred embodiment, the metal shell is provided with an outer shell formed by drawing forward from the outer edge of the rear end wall, and the outer shell, the rear end wall, the inner shell, the protrusion and the tongue plate portion are jointly arranged to form an insertion space.
[0008] In a preferred embodiment, the electric connector comprises a metal bracket sleeved outside the insulating body and the metal shell, the metal bracket comprises an upper bracket and a lower bracket connected together, the upper bracket is provided with a top wall welded to the upper side of the outer wall surface of the shell, and the lower bracket is provided with a bottom wall welded to the lower side of the outer wall surface of the shell.
[0009] In a preferred embodiment, the outer surface of the base does not exceed the outer wall surface of the shell outwardly, and the top wall and the bottom wall jointly cover the base and part of the outer side of the shell.
[0010] In a preferred embodiment, the upper bracket is provided with upper fixing pieces extending from the lateral sides of the top wall, the lower bracket is provided with lower fixing pieces extending from the lateral sides of the bottom wall, and the upper fixing pieces and the lower fixing pieces are welded together to form a fixing part.
[0011] In a preferred embodiment, the upper bracket is provided with an upper elastic piece extending inwardly from the rear end of the top wall, the lower bracket is provided with a lower elastic piece extending inwardly from the rear end of the bottom wall, the base is provided with a groove at the rear end part, and the upper elastic piece and the lower elastic piece extend into the corresponding groove obliquely.
[0012] In a preferred embodiment, the electric connector comprises a sleeve sleeved at the front end of the shell, the sleeve is located in front of the metal bracket and is welded to the shell.
[0013] In a preferred embodiment, the sleeve is provided with a sleeve ring welded to the outer wall surface of the shell and a flange extending outwardly from the front edge of the sleeve ring, and the flange and the front edge of the shell jointly form a receiving groove.
[0014] In a preferred embodiment, the electric connector comprises a waterproof ring sleeved outside the front end of the shell, and the waterproof ring is accommodated in the receiving groove.
[0015] Compared with the prior art, the metal shell is provided with an annular rear end wall abutting against the front end surface of the base and an inner shell formed by drawing forward from the inner edge of the rear end wall, the inner shell covers the outer surface of the stepped part, the stepped part is provided with a protruding part protruding outwardly from the front end part, the protruding part is located in front of the inner shell, and the outer surface of the protruding part is flush with the outer wall surface of the inner shell. The stepped part of the insulating body and the inner shell of the metal shell are subjected to secondary injection molding, so that the step difference between the two is filled, the electric connector has good plugging feeling and plugging durability, and plugging is more smooth. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1is a three-dimensional schematic view of the electric connector in the preferred embodiment of the utility model.
[0017] Figure 2 is Figure 1 is another three-dimensional schematic view of the electric connector.
[0018] Figure 3 is Figure 1 is an exploded schematic view of the electric connector.
[0019] Figure 4 is Figure 3 is another exploded schematic view of the electric connector.
[0020] Figure 5 is Figure 1 is a sectional view of the electric connector. DETAILED DESCRIPTION
[0021] Referring to Figures 1 to 5 The preferred embodiment of the utility model discloses an electric connector 100, which is a USB Type-C connector and is used for being mounted on a circuit board. The electric connector 100 comprises an insulating body 10 extending in the longitudinal direction, a plurality of conductive terminals 20 held on the insulating body 10, a metal shell 30 sleeved on the outer side of the insulating body 10 and a metal support 40 sleeved on the outer sides of the insulating body 10 and the metal shell 30.
[0022] Referring to Figures 3 to 4 As shown in the figure, the insulating body 10 is provided with a base portion 11 extending in the transverse direction, a step portion 12 extending forward in the longitudinal direction from the base portion 11 and a tongue plate portion 13 extending forward in the longitudinal direction from the step portion 12, the thickness and width of the step portion 12 are greater than those of the tongue plate portion 13, so that a step is formed between the two.
[0023] The conductive terminals 20 are injection molded in the insulating body 10, and the conductive terminals 20 are provided with contact portions arranged on the upper and lower surfaces of the tongue plate portion 13 and welding pins extending backward from the base portion 11, that is, the conductive terminals 20 are at least partially exposed on the surface of the tongue plate portion 13 to contact the mating terminals of the mating connector.
[0024] In combination with Figure 5As shown, the metal shell 30 is formed by drawing, and is provided with an annular rear end wall 31 abutting against the front end surface of the base 11, an inner shell 32 drawn forward from the inner edge of the rear end wall 31 in the longitudinal direction, and an outer shell 33 drawn forward from the outer edge of the rear end wall 31 in the longitudinal direction. The inner shell 32 covers the outer surface of the stepped portion 12, which is provided with a protruding portion 121 protruding outward from the front end portion, and the protruding portion 121 is located in front of the inner shell 32. Therefore, the outer shell 33, the rear end wall 31, the inner shell 32, the protruding portion 121, and the tongue plate portion 13 jointly define a plug-in space 101 for the plug-in of the mating connector.
[0025] The inner shell 32 is formed by secondary injection molding on the stepped portion 12 of the insulating body 10, and the outer surface of the protruding portion 121 is flush with the outer wall surface of the inner shell 32. When the mating connector is plugged in, the mating shield of the mating connector can smoothly transition from the protruding portion 121 to the inner shell 32 and contact the outer wall surface of the inner shell 32. Thus, the stepped portion 12 of the insulating body 10 and the inner shell 32 of the metal shell 30 are formed by secondary injection molding, which fills the stepped gap between them, so that the electrical connector 100 has good plug-in feel and plug-in durability, making the plug-in smoother.
[0026] The metal support 40 includes an upper support 41 and a lower support 42 connected to each other, the upper support 41 is provided with a top wall 411 welded to the outer wall surface of the outer shell 33 on the upper side, an upper fixing sheet 412 extending from the transverse sides of the top wall 411, and an upper elastic sheet 413 extending inward from the rear end of the top wall 411; the lower support 42 is provided with a bottom wall 421 welded to the outer wall surface of the outer shell 33 on the lower side, a lower fixing sheet 422 extending from the transverse sides of the bottom wall 421, and a lower elastic sheet 423 extending inward from the rear end of the bottom wall 421.
[0027] The outer surface of the base 11 does not exceed the outer wall surface of the outer shell 33, so the top wall 411 and the bottom wall 421 jointly cover the outer side of the base 11 and part of the outer shell 33. The upper fixing sheet 412 and the lower fixing sheet 422 are welded together to form a fixing portion 43 for plug-in fixing to the circuit board. The base 11 is also provided with a groove 111 at the rear end portion, and the upper elastic sheet 413 and the lower elastic sheet 423 respectively extend obliquely into the corresponding grooves 111 to fix the metal support 40 to the insulating body 10.
[0028] The electric connector 100 further comprises a sleeve 50 sleeved on the front end of the shell 33 and a waterproof ring 60 sleeved on the outside of the front end of the shell 33, the sleeve 50 is located in front of the metal support 40 and is welded on the shell 33. The sleeve 50 is provided with a sleeve ring 51 welded on the outer wall surface of the shell 33 and a flange 52 extending outward from the front edge of the sleeve ring 51, the flange 52 is co-molded with the front edge of the shell 33 to have a containing groove. The waterproof ring 60 is cured by UV glue and is accommodated in the containing groove; therefore, the waterproof ring 50 is clamped and fixed between the mating device and the metal shell 30, eliminates the gap between the two, thereby avoiding the infiltration of external moisture or humidity along the gap, and eliminating the leakage of waterproof.
[0029] In the utility model, the metal shell 30 is provided with an annular rear end wall 31 abutting on the front end surface of the base 11 and an inner shell 32 formed by drawing forward from the inner edge of the rear end wall 31, the inner shell 32 is covered on the outer surface of the stepped portion 12, the stepped portion 12 is provided with a protruding portion 121 protruding outward from the front end portion, the protruding portion 121 is located in front of the inner shell 32, and the outer surface of the protruding portion 121 is flush with the outer wall surface of the inner shell 32. The stepped portion 12 of the insulating body 10 and the inner shell 32 of the metal shell 30 are subjected to secondary injection molding, thereby filling the stepped difference between the two, so that the electric connector 100 has good plug-in feeling and plug-in durability life, so that the plug-in is more smooth.
[0030] In conclusion, the above is only the preferred embodiment of the utility model, and should not limit the scope of the utility model, that is, all simple equivalent changes and modifications made according to the utility model claims and the content of the specification should still belong to the scope of the utility model patent.
Claims
1. An electrical connector comprising an insulating body extending in a longitudinal direction, a plurality of conductive terminals held on the insulating body, and a metal shell covering the outside of the insulating body, the insulating body being provided with a base portion, a step portion extending forward from the base portion, and a tongue plate portion extending forward from the step portion, the conductive terminals being at least partially exposed to the surface of the tongue plate portion; characterized in that: The metal shell is provided with an annular rear end wall abutting against a front end surface of the base and an inner shell drawn forward from an inner edge of the rear end wall, the inner shell covering an outer surface of the stepped portion, the stepped portion being provided with a protruding portion protruding outward from a front end portion, the protruding portion being located in front of the inner shell, and an outer surface of the protruding portion being flush with an outer wall surface of the inner shell.
2. The electrical connector of claim 1, wherein: The conductive terminal is once injection molded in the insulating body, and the inner shell is twice injection molded on the stepped portion of the insulating body.
3. The electrical connector of claim 1, wherein: The metal shell is provided with an outer shell drawn forward from an outer edge of the rear end wall, the outer shell, the rear end wall, the inner shell, the protruding portion and the tongue plate portion jointly forming a plug-in space.
4. The electrical connector of claim 3, wherein: The electric connector comprises a metal support sleeved outside the insulating body and the metal shell, the metal support comprising an upper support and a lower support connected together, the upper support being provided with a top wall welded to an upper side of an outer wall surface of the outer shell, and the lower support being provided with a bottom wall welded to a lower side of the outer wall surface of the outer shell.
5. The electrical connector of claim 4, wherein: An outer surface of the base does not exceed an outer wall surface of the outer shell, and the top wall and the bottom wall jointly cover an outer side of the base and part of the outer shell.
6. The electrical connector of claim 5, wherein: The upper support is provided with upper fixing pieces extending from transverse sides of the top wall, the lower support is provided with lower fixing pieces extending from transverse sides of the bottom wall, and the upper fixing pieces and the lower fixing pieces are welded together to form a fixing portion.
7. The electrical connector of claim 5, wherein: The upper support is provided with upper elastic pieces extending inward from rear ends of the top wall, the lower support is provided with lower elastic pieces extending inward from rear ends of the bottom wall, and the base is provided with grooves at rear end portions, the upper elastic pieces and the lower elastic pieces extending obliquely into the corresponding grooves.
8. The electrical connector of claim 4, wherein: The electric connector comprises a sleeve sleeved at a front end of the outer shell, the sleeve being located in front of the metal support and welded to the outer shell.
9. The electrical connector of claim 8, wherein: The sleeve is provided with a sleeve ring welded to an outer wall surface of the outer shell and a flange extending outward from a front edge of the sleeve ring, the flange and a front edge of the outer shell jointly forming a receiving groove.
10. The electrical connector of claim 9, wherein: The electric connector comprises a waterproof ring sleeved outside a front end of the outer shell, the waterproof ring being accommodated in the receiving groove.