Waterproof electric connector assembly

Abstract

A waterproof electric connector assembly is composed of a plug and a socket, the plug is provided with a cylindrical plugging part, and the socket is provided with a cylindrical jack matched with the cylindrical plugging part; the socket is characterized in that the end part, facing the plug, of the socket is a cylindrical wall surface surrounding the cylindrical jack, and the peripheral surface of the cylindrical wall surface is provided with a flange; an integrally formed protective sleeve facing the socket side is arranged at the rear part of the cylindrical plugging part on the periphery of the plug; when the plug is in butt joint with the socket, the protective sleeve sleeves the outer side of the end part of the cylindrical wall surface of the socket; the inner wall of the protective sleeve is provided with a protective sleeve annular groove corresponding to the flange, and the protective sleeve annular groove is in interference fit with the flange. According to the utility model, a radial waterproof seal is added at the joint of the plug and the socket, and compared with the axial seal of the plug and the socket in the prior art, the waterproof performance is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric connector. BACKGROUND

[0002] The electric connector assembly is a basic element for realizing electrical or optical circuit interconnection in an electronic system, and especially in a humid, underwater or harsh environment (such as marine exploration or industrial automation), reliable waterproof sealing is crucial for protecting the integrity of the circuit and ensuring the long-term stable operation of the equipment. The traditional electric connector assembly design often faces problems such as unreliable sealing, large coupling force, and easy damage to the contact, prompting continuous evolution of technology.

[0003] There are various waterproof electric connector schemes in the prior art. For example, a data transmission waterproof elbow connector is disclosed in a Chinese utility model patent with the authorization announcement number CN222720750 U, which seals the abutting end face of the 7PIN male head and the 7PIN female head by setting an annular sealing ring, and locks it by using a clasp ring. This structure represents the current common end face sealing method. However, this structure mainly relies on the compression sealing of the abutting plane, and in actual application, especially in the case of frequent plugging and unplugging, mechanical vibration or long-term use leading to slight wear and aging of the components, the reliability and durability of the single end face sealing ring face challenges. If the sealing ring is not compressed uniformly or the pre-tightening force is insufficient, it is easy to form a water seepage path in harsh environments. In addition, end face sealing has very high requirements for structural stiffness and fitting accuracy, and slight deformation or misalignment can affect the sealing effect, leaving room for further improvement of sealing performance. Therefore, there is an urgent need for a waterproof electric connector scheme with a more stable sealing structure and stronger environmental interference resistance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a waterproof electric connector assembly.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a waterproof electric connector assembly is composed of a plug and a socket, the plug has a cylindrical plug-in part, the socket has a cylindrical socket hole matched with the cylindrical plug-in part;

[0006] The end of the socket facing the plug is a cylindrical wall surface around the cylindrical socket hole, a flange is arranged on the outer circumferential surface of the cylindrical wall surface, the flange is arranged along the circumferential direction of the cylindrical socket hole and protrudes in the radial direction of the cylindrical socket hole;

[0007] A protective sleeve is arranged on the outer circumferential surface of the plug behind the cylindrical plug-in part, and the protective sleeve is arranged on the outer side of the end of the cylindrical wall surface of the socket when the plug is connected with the socket;

[0008] And, the inner wall of the protective sleeve is provided with a protective sleeve annular groove corresponding to the flange, and the protective sleeve annular groove is in interference fit with the flange.

[0009] In the above scheme, the cylindrical plug-in part of the plug is provided with a plug annular groove and a plug annular ridge on the outer periphery thereof, and the cylindrical socket is provided with a socket annular ridge and a socket annular groove corresponding to the plug annular groove and the plug annular ridge; the plug annular groove is in interference fit with the socket annular ridge, and the plug annular ridge is in interference fit with the socket annular groove.

[0010] Further, the cylindrical plug-in part of the plug is divided into a first section, a second section and a third section by the plug annular groove and the plug annular ridge, and the first section, the second section and the third section are arranged in sequence from the front end of the plug towards the socket; the cylindrical socket is divided into a first hole section, a second hole section and a third hole section by the socket annular groove and the socket annular ridge; the diameter of the second section is equal to or smaller than the diameter of the first section, and the diameter of the third section is greater than the diameter of the first section; in the final state of the plug and the socket being plugged together, the first section is in interference fit with the first hole section, the third section is in interference fit with the third hole section, and the second section is in clearance fit with the second hole section; and the inner diameter of the second hole section is greater than the diameter of the first section by 0.15 mm or more.

[0011] Further, the diameter of the second section is smaller than the diameter of the first section, and the outer periphery of the second section is a tapered surface, and the small end of the tapered surface is closer to the front end of the plug than the large end.

[0012] Further, the inner diameter of the second hole section is equal to the inner diameter of the third hole section.

[0013] Specifically, the plug annular ridge can be an elastic annular sealing member fixed on the outer periphery of the plug. The socket annular ridge can also be an elastic annular sealing member fixed on the inner hole wall of the socket.

[0014] In the above scheme, the outer periphery of one of the plug and the socket is further provided with a convex point, and the convex point is closer to the direction mark of the other one than the direction mark of itself.

[0015] In the above scheme, the most front end of the cylindrical plug-in part is further provided with a tapered lead-in section.

[0016] The utility model discloses a protection sleeve, protection sleeve annular groove and flange have been increased, when the plug is butted with the socket, the protection sleeve is sleeved on the outside of the cylindrical wall end of the socket, and the flange is clamped in the protection sleeve annular groove, that is, a radial waterproof seal is added at the joint of the plug and the socket, compared with the axial seal of the sealing ring on the axial end face of the plug and the socket in the prior art, the waterproof performance is greatly improved, and because it is radial seal, the dimensional accuracy is guaranteed, and the sealing property is not influenced by the axial insertion depth of the plug relative to the socket. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the three-dimensional schematic view that the plug and the socket of the utility model embodiment one are separated;

[0018] Figure 2 It is the full section schematic view that the plug and the socket of the utility model embodiment one are separated;

[0019] Figure 3 It is the full section schematic view that the plug and the socket of the utility model embodiment one are inserted and combined and the final state;

[0020] Figure 4 It is the full section three-dimensional schematic view that the plug and the socket of the utility model embodiment two are inserted and combined;

[0021] Figure 5 It is the three-dimensional schematic view of the plug of the utility model embodiment three.

[0022] In the above drawings:

[0023] 1. plug;100, cylindrical plug-in part;11, plug annular groove;12, plug annular ridge;15, first solid net tail;16, tapered lead-in section;17, protection sleeve;171, protection sleeve annular groove;D10, first section;D20, second section;D30, third section;

[0024] 2. socket;200, cylindrical socket;21, socket annular groove;22, socket annular ridge;23, front protrusion;24, rear protrusion;25, second solid net tail;26, cylindrical wall;27, flange;D101, first hole section;D201, second hole section;D301, third hole section. DETAILED DESCRIPTION

[0025] The utility model will be further described in connection with the drawings and embodiments:

[0026] The present application will be described in detail below with reference to the drawings and detailed description, and any person skilled in the art can change and modify the technology taught by the present application after understanding the embodiments of the present application, which does not deviate from the spirit and scope of the present application.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present case. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0028] Embodiment one: a waterproof type electric connector assembly, as shown in Figures 1-2

[0029] Figures 1-3 As shown, the electric connector assembly is composed of a plug 1 and a socket 2, the plug 1 has a cylindrical plug-in part 100, the socket 2 has a cylindrical socket hole 200 matched with the cylindrical plug-in part 100. Corresponding electric connection terminals are arranged in the cylindrical plug-in part 100 and the cylindrical socket hole 200 to form electric signal channels. Specifically, the form and number of electric connection terminals are selected as needed.

[0030] Figure 2 As shown, the end of the socket 2 towards the plug 1 is a cylindrical wall surface 26 around the cylindrical socket hole 200, a flange 27 is arranged on the outer circumferential surface of the cylindrical wall surface 26, the flange 27 is arranged along the circumference of the cylindrical socket hole 200 and protrudes in the radial direction of the cylindrical socket hole 200. The flange 27 is usually integrally formed on the socket 2, and the cross section of the flange 27 is preferably semicircular.

[0031] Figures 1-3 As shown, a protective sleeve 17 is integrally formed on the outer circumference of the plug 1 towards the socket 2 side at the rear of the cylindrical plug-in part 100. When the plug 1 is connected with the socket 2, the protective sleeve 17 is sleeved on the outside of the end of the cylindrical wall surface 26 of the socket 2, as shown in Figure 3 The protective sleeve 17 is integrally formed on the outer circumference of the plug 1 and extends outward, with the opening facing the front end (i.e. the socket 2 side).

[0032] As shown in Figure 2 Figure 3 As shown, a protective sleeve annular groove 171 is arranged on the inner wall of the protective sleeve 17 corresponding to the flange 27, and the protective sleeve annular groove 171 is in interference fit with the flange 27.

[0033] When the plug 1 is connected with the socket 2, the protective sleeve 17 is sleeved on the outside of the end of the cylindrical wall surface 26 of the socket 2, and the flange 27 is clamped in the protective sleeve annular groove 171, that is, a first waterproof seal (in the radial direction) is added at the joint of the plug 1 and the socket 2, which greatly improves the protection of the sealing ring arranged on the axial end face of the plug 1 and the socket 2 in the prior art.

[0034] Figures 1-2 ​​​​​​As shown, the outer periphery of the plug 1 is provided with a plug annular groove 11 and a plug annular ridge 12, and the socket 2 is provided with a socket annular groove 21 and a socket annular ridge 22, which are complementary and correspondingly arranged. The plug annular ridge 12 is an elastic annular sealing member, which is fixed on the outer periphery of the plug 1. The socket annular ridge 22 is also an elastic annular sealing member, which is fixed on the inner hole wall of the socket 2. In the final state of the plug 1 and the socket 2 after being inserted, the plug annular ridge 12 is compressed and clamped in the socket annular groove 21, and the socket annular ridge 22 is compressed and clamped in the plug annular groove 11.

[0035] Referring to Figure 2 As shown, the cylindrical plug-in part 100 is divided into a first section D10, a second section D20 and a third section D30 by the plug annular groove 11 and the plug annular ridge 12, which are arranged in sequence from the front end (the end towards the socket) of the plug 1 to the rear.

[0036] Referring to Figure 2 As shown, the cylindrical hole 200 of the socket 2 is divided into a first hole section D101, a second hole section D201 and a third hole section D301 by the socket annular groove 21 and the socket annular ridge 22. In the final state of the plug 1 and the socket 2 after being inserted, the first section D10 corresponds to the first hole section D101, the second section D20 corresponds to the second hole section D201, and the third section D30 corresponds to the third hole section D301.

[0037] Referring to Figure 2 and Figure 3 As shown, the diameter of the second section D20 is equal to or less than the diameter of the first section D10, and the diameter of the third section D30 is greater than the diameter of the first section D10; in the final state of the plug 1 and the socket after being inserted, the first section D10 is in interference fit with the first hole section D101, the third section D30 is in interference fit with the third hole section D301, and the second section D20 is in clearance fit with the second hole section D201; and the inner diameter of the second hole section D201 is greater than the diameter of the first section D10 by more than 0.15 mm.

[0038] Referring to Figure 1 , Figure 2 and Figure 3 As shown, the tail of the plug 1 and the socket 2 is provided with a whole injection molded solid mesh tail for protecting the cable: a first solid mesh tail 15 and a second solid mesh tail 25, which maximally reduces the length size of the electrical connector, realizes the minimum space occupied in the length direction, and facilitates the customer to install and use in a smaller space.

[0039] Referring to Figure 2As shown, the outer periphery of the socket 2 is provided with a front protrusion 23 and a rear protrusion 24, which are arranged apart to form a saddle-shaped hand holding portion. In use, the fingers are pinched at the middle position of the saddle-shaped hand holding portion, increasing the contact area of the fingers with the connector and improving the comfort of hand pinching the connector during plugging.

[0040] Embodiment two, referring to Figure 5 As shown, an electrical connector assembly is composed of a plug 1 and a socket 2, the plug 1 has a cylindrical plug-in portion, and the socket 2 has a cylindrical socket hole matched with the cylindrical plug-in portion. Different from embodiment one, the diameter of the second section D20 is smaller than that of the first section D10, and the outer periphery of the second section D20 is a tapered surface, the small end of which is closer to the front end of the plug than the large end, so as to facilitate the discharge of squeezed air during insertion and reduce the insertion force, and meanwhile, the taper of the second section D20 is beneficial to the separation of the mold and the product during injection molding, reducing the demolding difficulty. Moreover, the inner diameter of the second hole section D201 is equal to that of the third hole section D301, which is easier to manufacture.

[0041] Other than embodiment one, which will not be repeated here.

[0042] Embodiment three, an electrical connector assembly is composed of a plug 1 and a socket 2, the plug 1 has a cylindrical plug-in portion, and the socket 2 has a cylindrical socket hole matched with the cylindrical plug-in portion, different from embodiment one, referring to Figure 5 As shown, in order to facilitate insertion, the most front end of the cylindrical plug-in portion 100 of the plug 1 is further provided with a tapered guide-in section 16, which is located on the front side of the first section D10. So that the front end of the plug 1 is easier to pass through the annular ridge 22 of the socket.

[0043] Other than embodiment one, which will not be repeated here.

[0044] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose of which is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A waterproof electric connector assembly, comprising a plug (1) and a socket (2), the plug (1) having a cylindrical plug portion (100), and the socket (2) having a cylindrical socket hole (200) matched with the cylindrical plug portion (100); characterized in that: an end of the socket (2) facing the plug (1) is a cylindrical wall surface (26) around the cylindrical socket hole (200), and a flange (27) is arranged on the outer circumferential surface of the cylindrical wall surface (26), the flange (27) being annularly arranged along the circumference of the cylindrical socket hole (200) and protruding in the radial direction of the cylindrical socket hole (200); a protective sleeve (17) is integrally arranged on the outer circumferential surface of the plug (1) at the rear of the cylindrical plug portion (100) and faces the socket (2); when the plug (1) is connected with the socket (2), the protective sleeve (17) is sleeved outside the end of the cylindrical wall surface (26) of the socket (2); and a protective sleeve annular groove (171) is arranged on the inner wall of the protective sleeve (17) and corresponds to the flange (27), and the protective sleeve annular groove (171) is in interference fit with the flange (27). The outer circumferential surface of the cylindrical plug portion (100) of the plug (1) is provided with a plug annular groove (11) and a plug annular ridge (12), and the inner wall of the cylindrical socket hole (200) of the socket (2) is correspondingly provided with a socket annular ridge (22) and a socket annular groove (21); the plug annular groove (11) is in interference fit with the socket annular ridge (22), and the plug annular ridge (12) is in interference fit with the socket annular groove (21). The cylindrical plug portion (100) of the plug (1) is divided into a first section (D10), a second section (D20) and a third section (D30) by the plug annular groove (11) and the plug annular ridge (12), and the first section (D10), the second section (D20) and the third section (D30) are sequentially arranged from the front end of the plug facing the socket (2) to the rear; the cylindrical socket hole (200) of the socket (2) is divided into a first hole section (D101), a second hole section (D201) and a third hole section (D301) by the socket annular groove (21) and the socket annular ridge (22); the diameter of the second section (D20) is equal to or smaller than the diameter of the first section (D10), and the diameter of the third section (D30) is larger than the diameter of the first section (D10); in the final state of the plug (1) and the socket (2) being connected, the first section (D10) is in interference fit with the first hole section (D101), the third section (D30) is in interference fit with the third hole section (D301), and the second section (D20) is in clearance fit with the second hole section (D201); and the inner diameter of the second hole section (D201) is greater than the diameter of the first section (D10) by 0.15 mm or more. The diameter of the second section (D20) is smaller than the diameter of the first section (D10), and the outer circumferential surface of the second section (D20) is a tapered surface, and the small end of the tapered surface is closer to the front end of the plug (1) than the large end.

2. The waterproof electrical connector assembly of claim 1, wherein: ​ 3. The waterproof electrical connector assembly of claim 2, wherein: ​ 4. The waterproof electrical connector assembly of claim 3, wherein: ​ 5. The waterproof electrical connector assembly of claim 3, wherein: The inner diameter of the second hole section (D201) is equal to the inner diameter of the third hole section (D301).

6. The waterproof electrical connector assembly of claim 2, wherein: The annular ridge (12) of the plug is an elastic annular seal fixed to the outer circumferential surface of the plug (1).

7. The waterproof electrical connector assembly of claim 2, wherein: The annular ridge (22) of the socket is an elastic annular seal fixed to the inner hole wall of the socket (2).

8. The waterproof electrical connector assembly of claim 1, wherein: The front end of the cylindrical plug-in part (100) is further provided with a tapered lead-in section (16).

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