Electrical connector

Abstract

The application provides an electric connector, which comprises an insulating body, a plurality of terminals held in the insulating body, and a first waterproof ring and a second waterproof ring. The insulating body comprises a base, a barrel part extending forward from the base, and a mating cavity. The mating cavity is arranged on the barrel part and penetrates through a front end surface of the barrel part. The terminals are held in the base and exposed to the mating cavity forwardly. An outer surface of the barrel part is concavely provided with a first ring groove and a second ring groove. The first ring groove is closer to the front end surface of the barrel part than the second ring groove. The width of the first ring groove is greater than that of the second ring groove. The first waterproof ring is installed in the first ring groove, and the second waterproof ring is installed in the second ring groove, so that the first waterproof ring is prevented from falling off from the first ring groove after the electric connector is plugged into a mating connector.

Description

Technical Field

[0001] This invention relates to electrical connectors, and more particularly to a waterproof electrical connector. Background Technology

[0002] For relevant prior art, please refer to the Chinese Utility Model Patent CN216085526U, which discloses a male connector and a female connector that can be mated together. The male connector has a receiving cavity, and the female connector includes a female body that can be inserted into the receiving cavity. The mating end of the female body is provided with a first waterproof ring and a second waterproof ring to achieve a double waterproof effect. However, when the male connector and the female connector are mated together, because the second waterproof ring is closer to the front end face of the mating end than the first waterproof ring, the insertion and removal stroke of the second waterproof ring is longer than that of the first waterproof ring. The air pressure is greater closer to the bottom of the receiving cavity, which makes the second waterproof ring prone to air blockage and falling off during insertion and removal, thus affecting the normal use of the connector.

[0003] Therefore, it is necessary to provide an improved electrical connector to address the aforementioned problems. Utility Model Content

[0004] The technical solution to be solved by this invention is to provide an electrical connector that is waterproof and has good structural stability.

[0005] This application provides a technical solution: an electrical connector, comprising an insulating body, a plurality of terminals fixed to the insulating body, and a first waterproof ring and a second waterproof ring. The insulating body includes a base, a cylindrical portion extending forward from the base, and a mating cavity. The mating cavity is disposed in the cylindrical portion and extends forward through the front end face of the cylindrical portion. The terminals are fixed to the base and exposed forward in the mating cavity. A first annular groove and a second annular groove are recessed on the outer surface of the cylindrical portion. The first annular groove is closer to the front end face of the cylindrical portion than the second annular groove. The width of the first annular groove is greater than the width of the second annular groove. The first waterproof ring is installed in the first annular groove, and the second waterproof ring is installed in the second annular groove.

[0006] Compared to existing technologies, the electrical connector of this invention has a wider first annular groove closer to the front end face of the cylindrical body, which can effectively improve the airlock problem of the first waterproof ring set in the first annular groove, facilitate the smooth insertion and removal of the electrical connector and improve the problem of the first waterproof ring falling off. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram of the electrical connector used in this invention.

[0008] Figure 2 This is a three-dimensional schematic diagram of the electrical connector in this creation from another angle.

[0009] Figure 3 For along Figure 1 A cross-sectional view along line AA in the middle.

[0010] Figure 4 For along Figure 1 A cross-sectional view along the BB line.

[0011] Figure 5 For along Figure 1 A cross-sectional view along the CC line.

[0012] Figure 6 for Figure 1 A 3D view showing the partial disassembly.

[0013] Figure 7 This is a three-dimensional view of the insulating body of the electrical connector used in this invention.

[0014] Component Symbol Explanation

[0015] Electrical connector 100, insulating body 10, base 11

[0016] Extension wing 110 Mounting hole 111 Terminal holder 112

[0017] Terminal slot 113, cylindrical body 12, front end face 120

[0018] First annular groove 121 Second annular groove 122 First gap 123

[0019] Second gap 124, docking cavity 13, anti-foolproof part 130

[0020] Gasket 14, Through Hole 140, Terminal 20

[0021] Holding section 21, front section 211, rear section 212

[0022] Step surface 213, Joint 22, Recessed section 221

[0023] Extension end 222 Welding part 23 Welding platform 231

[0024] Power terminal P, signal terminal S, first waterproof ring 30

[0025] Second waterproof ring 40. Detailed Implementation

[0026] The following will combine Figures 1 to 7 This paper introduces the specific implementation methods of the electrical connector of this utility model.

[0027] Figure 1 and Figure 2This is a perspective view of the electrical connector 100 of this utility model. The electrical connector 100 includes an insulating body 10, a plurality of terminals 20 fixed to the insulating body 10, and a first waterproof ring 30 and a second waterproof ring 40. The insulating body 10 includes a base 11, a cylindrical portion 12 extending forward from the base 11, and a mating cavity 13. The mating cavity 13 is disposed in the cylindrical portion 12 and extends forward through the front end face 120 of the cylindrical portion 12. Figure 3 and Figure 4 The plurality of terminals 20 include two power terminals P and a plurality of signal terminals S, the terminals 20 being fixed to the base 11 and exposed forward to the mating cavity 13, as shown below. Figure 6 and Figure 7 As shown, the outer surface of the cylindrical body 12 is recessed with a first annular groove 121 and a second annular groove 122. The first annular groove 121 is closer to the front end face 120 of the cylindrical body 12 than the second annular groove 122. (Refer to...) Figure 3 The first waterproof ring 30 is installed in the first annular groove 121, and the second waterproof ring 40 is installed in the second annular groove 122. The width of the first annular groove is greater than the width of the second annular groove. When the electrical connector 100 is inserted into a mating connector (not shown), the cylindrical part 12 is inserted into a mating cavity of the mating connector. The first and second waterproof rings 30 and 40 contact the cavity wall to seal the gap between the cylindrical part 12 and the cavity, thereby achieving a better waterproof effect. Since the first waterproof ring 30 is closer to the front end face 120 of the cylindrical part 12, it has a longer insertion stroke, and the pressure is greater the closer it is to the bottom of the mating connector cavity, the easier it is to generate airlock problems, which increases the insertion and extraction resistance and causes the first waterproof ring 30 to fall off. Therefore, this invention widens the width of the first annular groove 121 that accommodates the first waterproof ring 30 so that there is a larger gap between the first waterproof ring 30 and the first annular groove 121, thereby improving the above problems.

[0028] Furthermore, in the front-to-back direction, a first gap 123 is provided between the first waterproof ring 30 and the first annular groove 121, and the width of the first annular groove 121 is widened so that there is a larger first gap 123 between the first waterproof ring 30 and the first annular groove 121, thereby providing more space to facilitate the deformation of the first waterproof ring and reduce the risk of airlock.

[0029] Furthermore, in the front-to-back direction, a second gap 124 is provided between the second waterproof ring 40 and the second annular groove 122. The first gap 123 is wider than the second gap 124. The first gap 123 and the second gap 124 can be used for venting to alleviate the problem of air plugging during interlocking.

[0030] like Figure 7As shown, the bottom of both the first annular groove 121 and the second annular groove 122 is provided with an arc-shaped surface 125 and a flat surface 126. This reduces the mating area between the first and second waterproof rings 30 and 40 and the inner surfaces of the first and second annular grooves 121 and 122, increases the venting space between the first and second waterproof rings 30 and 40 and the first and second annular grooves 121 and 122, facilitates gas discharge, and further avoids the problem of air blockage when the electrical connector 100 and the mating connector are mated and plugged in.

[0031] like Figure 1 and Figure 6 As shown, the base 11 includes a square extension wing 110, and the cylindrical body 12 is cylindrical and extends forward from the center of the extension wing 110. The base 11 has four mounting holes 111 penetrating the extension wing 110, and the four mounting holes 111 are respectively located at the four corners of the extension wing 110. The base 11 is cylindrical, and the electrical connector 100 includes a gasket 14. The gasket 14 has a through hole 140 for the base 11 to pass through, and the gasket 14 passes through the base 11 from back to front and is disposed close to the rear side of the extension wing 110.

[0032] See Figures 1 to 5 The base 11 includes a plurality of terminal holders 112 extending forward and backward, each terminal holder 112 having a terminal slot 113 extending forward and backward, and a plurality of terminals 20 being fixed in the terminal slot 113 in a corresponding manner. The terminal holder 112 protrudes forward into the mating cavity 13. The mating cavity 13 is provided with a misalignment prevention part 130 for alignment guidance when the electrical connector and the mating connector are inserted.

[0033] Combination Figure 3 , Figure 4 and Figure 6 The terminal 20 is cylindrical and includes a retaining portion 21, a mating portion 22 extending forward from the retaining portion 21 and exposed in the mating cavity 13, and a welding portion 23 extending rearward from the retaining portion 21. The retaining portion 21 includes a front section 211 with a first radial width and a rear section 212 with a second radial width. The first radial width is greater than the second radial width to form a stepped surface 213 at the connection between the front section 211 and the rear section 212. The terminal slot 113 has a front slot section (not shown) and a rear slot section (not shown) that respectively match the front section and the rear section. The diameter of the front slot section is smaller than the diameter of the rear slot section to form a stop surface (not shown) at the connection between the front slot section and the rear slot section. The terminal 20 is inserted into the terminal slot 113 from rear to front, and the stepped surface 213 abuts against the stop surface. A portion of the structure of the welding portion 23 of the power terminal P is removed to form a welding platform 231. The docking portion 22 of the power terminal P is provided with an inwardly contracting section 221 and its extended end 222 is gradually tapered.

[0034] The above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of this utility model should still fall within the scope of this utility model patent.

Claims

1. An electrical connector, comprising an insulating body, a plurality of terminals held in the insulating body, and a first waterproof ring and a second waterproof ring, wherein the insulating body includes a base, a cylindrical portion extending forward from the base, and a mating cavity, the mating cavity being disposed in the cylindrical portion and extending forward through the front end face of the cylindrical portion, and the terminals being held in the base and exposed forward in the mating cavity, characterized in that: The outer surface of the cylindrical body is provided with a first annular groove and a second annular groove. The first annular groove is closer to the front end face of the cylindrical body than the second annular groove. The width of the first annular groove is greater than the width of the second annular groove. The first waterproof ring is installed in the first annular groove, and the second waterproof ring is installed in the second annular groove.

2. The electrical connector as described in claim 1, characterized in that: In the front-to-back direction, a first gap is provided between the first waterproof ring and the first annular groove.

3. The electrical connector as described in claim 2, characterized in that: In the front-to-back direction, a second gap is provided between the second waterproof ring and the second annular groove, and the first gap is wider than the second gap.

4. The electrical connector as described in claim 1, characterized in that: The bottom of the first annular groove has an arc-shaped surface and a flat surface.

5. The electrical connector as described in claim 1, characterized in that: The bottom of the second annular groove has an arc-shaped surface and a flat surface.

6. The electrical connector as claimed in claim 1, characterized in that: The base includes a square extension wing, the cylindrical body is cylindrical and extends forward from the center of the extension wing, and the base is provided with four mounting holes that penetrate the extension wing, the four mounting holes being respectively located at the four corners of the extension wing.

7. The electrical connector as claimed in claim 1, characterized in that: The base includes several terminal fixing seats that extend front to back, each terminal fixing seat having a terminal slot that extends front to back, and several terminals are fixed in the terminal slots one by one.

8. The electrical connector as claimed in claim 7, characterized in that: The terminal is cylindrical and includes a retaining portion, a mating portion extending forward from the retaining portion and exposed in the mating cavity, and a welding portion extending rearward from the retaining portion. The retaining portion includes a front section with a first radial width and a rear section with a second radial width. The first radial width is greater than the second radial width to form a stepped surface at the connection between the front section and the rear section. The terminal slot has a front slot section and a rear slot section that respectively match the front section and the rear section. The diameter of the front slot section is smaller than the diameter of the rear slot section to form a stop surface at the connection between the front slot section and the rear slot section. The terminal is inserted into the terminal slot from rear to front, and the stepped surface abuts against the stop surface.

9. The electrical connector as claimed in claim 8, characterized in that: The plurality of terminals include two power terminals, wherein the solder portion of the power terminals is partially cut off to form a soldering platform.

10. The electrical connector as claimed in claim 8, characterized in that: The plurality of terminals include two power terminals, wherein the mating portion of the power terminals is provided with an inwardly tapering section and its extended end is provided in a tapering shape.

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