Injection molding double-sealing longitudinal pressure-bearing wet plugging socket and connector

Abstract

The invention provides an injection molding double-sealing longitudinal pressure-bearing wet plugging socket and a connector, the socket comprises a socket shell, a hard insulation part formed by forcibly installing a hard insulator and a pin is arranged in an inner cavity of the socket shell, and the front end and the front section of the hard insulation part are coated with injection molding socket sealing bodies; the socket sealing body, the socket shell and the front end of the contact pin are bonded into a whole, so that a first layer of sealing inside the socket is realized; a first wedge-shaped space is arranged between the front section of the hard insulator and the socket shell, a second wedge-shaped space is arranged between the hard insulator and the contact pin, and the two wedge-shaped spaces are filled with the socket sealing body, so that a second layer of sealing inside the socket is realized. According to the invention, the socket shell, the contact pin, the hard insulator and the clamp spring are bonded into a whole in a manner that the socket sealing body is injected and coated at the front end and the front part of the hard insulating part, and the socket sealing body forms a wedge-shaped structure in the two wedge-shaped spaces after being molded, so that double sealing in the socket is realized.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to an injection-molded double-sealed longitudinal pressure-bearing wet-plug socket and a connector. Background Art

[0002] At present, there are many types of longitudinal pressure-bearing electrical connectors with a wide range of applications. They are widely used in defense, industry, aquaculture and other fields. The longitudinal sealed sockets installed on the metal shell panel are mainly divided into two categories: hard insulator sockets have strong pressure-bearing capacity and are suitable for a wide range of water depths, but the surface of the hard insulator is easily contaminated during plugging and unplugging operations in dirty and water environments, resulting in reduced insulation performance of the socket, so they are not suitable for wet plugging and unplugging scenarios; soft insulator sockets are easy to achieve independent sealing between each contact, have strong resistance to dirt, and can perform wet plugging and unplugging operations, but the sealing principle mainly relies on the bonding force between the soft insulator and the metal shell of the socket. In a water pressure environment, the bonding surface is subject to shear force and tends to tear, has weak pressure-bearing capacity, low service life, and limited applicable water depth.

[0003] Therefore, it is necessary to design a longitudinal sealing socket with good sealing effect, strong pressure bearing capacity, wide water depth range and high reliability. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an injection-molded double-sealed longitudinal pressure-bearing wet-plug socket and connector, by which the socket shell, pin, hard insulator and retaining spring are bonded as a whole by injection-coating the socket seal at the front end and front part of the hard insulating component. After the socket seal is molded, a wedge-shaped structure is formed in the "first wedge-shaped space between the hard insulator and the socket shell" and the "second wedge-shaped space between the hard insulator and the pin", thereby realizing double sealing inside the socket.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: On the one hand, the present invention discloses an injection-molded double-sealed longitudinal pressure-bearing wet-plug socket, comprising a socket shell, wherein the inner cavity of the socket shell is provided with a hard insulating component formed by a hard insulator and a plug pin, with the plug end of the socket as the front end, the front end and the front section of the hard insulating component are both covered with an injection-molded socket seal, and the socket seal is bonded to the socket shell and the front end of the plug pin as a whole, so as to realize the first layer of sealing inside the socket; A first wedge-shaped space is provided between the front section of the hard insulator and the socket shell, a second wedge-shaped space is provided between the hard insulator and the plug pin, and the socket seal fills the first wedge-shaped space and the second wedge-shaped space to achieve a second layer of sealing inside the socket.

[0006] Furthermore, the front section of the outer peripheral wall of the hard insulator is provided with at least one wedge-shaped groove which is deep in the front and shallow in the rear, and a first wedge-shaped space is enclosed between the front section of the outer peripheral wall of the hard insulator and the inner wall of the socket housing.

[0007] Furthermore, a plurality of wedge-shaped grooves are evenly distributed in the front section of the outer peripheral wall of the hard insulator.

[0008] Furthermore, a mounting hole for mounting the plug pin is provided on the hard insulator, the mounting hole comprises a tapered step hole section at the front section and an equal diameter hole section at the middle and rear section, and a second wedge-shaped space is formed between the inner wall of the tapered step hole section and the plug pin.

[0009] Furthermore, the insertion pin is provided with a step II which matches with the stop surface facing the front end in the conical step hole section to prevent the insertion pin from moving backwards.

[0010] Furthermore, the hard insulator is restricted in the socket housing by a retaining spring at the front end and a step I at the rear end.

[0011] Furthermore, the rear end of the hard insulator is provided with a step III that cooperates with the step I, and a convex key is provided on the step III, and the circumferential installation angle is limited by the cooperation between the convex key and the keyway on the step I.

[0012] Furthermore, the retaining spring is adhered to the retaining spring groove of the socket housing through the socket sealing body.

[0013] Furthermore, the socket housing is sealed with the mounting panel of the socket through an end face O-ring and is locked through a back-tightening nut to achieve external sealing installation of the socket.

[0014] Furthermore, a radial O-ring is provided between the socket housing and the mounting panel of the socket.

[0015] On the other hand, the present invention discloses a connector, including a plug and the above-mentioned socket.

[0016] Furthermore, the plug is provided with a socket corresponding to the pin, the socket sealing body includes a rubber sheath wrapped around the front end of the pin, and the pin with the rubber sheath wrapped at the front end is interference fit with the corresponding socket.

[0017] Furthermore, an interference rib cooperating with the insertion pin is provided on the inner wall of the insertion hole.

[0018] Beneficial effects: As described above, the injection-molded double-sealed longitudinal pressure-bearing wet-plug socket and connector of the present invention have the following beneficial effects: 1) The injection-molded double-sealed longitudinal pressure-bearing wet plug-in socket of the present invention has a simple structure and is easy to assemble. By injecting and coating the socket seal body at the front end and front part of the hard insulating component, it can achieve wet plug-in function while being suitable for high water pressure environment pressure. At the same time, the unique socket seal body structure is used to achieve sealing redundancy function, further improving the reliability of the socket.

[0019] 2) The pin member of the present invention is forcibly installed from front to back to the hard insulator to form a hard insulating component, and then the whole is installed from front to back into the socket housing. At this time, all parts in the pressure direction transmit the force to the housing step by step through step II to step III, thereby realizing the pressure-bearing function of the socket.

[0020] 3) The sealing function of the socket in the present invention is realized by the socket sealing body. After the above-mentioned pressure-bearing structure is assembled, it is put into the mold as a whole, and the rubber is injected from front to back to fill the mold cavity. The matured molded body bonds the socket shell, the pin, the hard insulator and the retaining spring into a whole, realizing the first layer of sealing function of the socket. After the socket sealing body is formed, a wedge-shaped structure is formed in the "first wedge-shaped space between the hard insulator and the socket shell" and the "second wedge-shaped space between the hard insulator and the pin", which can convert the water pressure from the plug-in end face into a positive pressure between the rubber and other hard parts, realizing the second layer of sealing of the socket.

[0021] 4) The present invention utilizes the property that the socket seal can achieve sealing through extrusion deformation. By designing an interference rib structure in the plug hole, which cooperates with the insulating sheath wrapped on the socket pin, an independent sealing structure between different hole positions after insertion is achieved to adapt to wet plugging and unplugging operations of the product in a dirty and watery environment.

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a cross-sectional view of the socket in the present invention.

[0025] Figure 2 This is a disassembled diagram of the socket.

[0026] Figure 3 Schematic diagram of a rigid insulating component.

[0027] Figure 4 A schematic diagram of the socket structure.

[0028] Figure 5 A schematic diagram of the connector structure.

[0029] Figure 6 A schematic diagram of the plug structure.

[0030] Markings in the diagram: 1. socket housing; 101. retaining ring groove; 102. step I; 2. end face O-ring; 3. radial O-ring; 4. back tightening nut; 5. pin; 501. step II; 6. hard insulator; 601. step III; 602. key; 603. wedge-shaped groove; 604. mounting hole; 7. retaining ring; 8. socket seal; 801. rubber sheath; 802. connecting section; 803. first wedge-shaped structure; 804. second wedge-shaped structure; 9. wedge-shaped space; 901. first wedge-shaped space; 902. second wedge-shaped space; 10. plug; 11. jack; 1101. interference rib. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "front" and "rear" indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the scope of protection of the present invention.

[0033] It should be noted that terms such as "I" and "II" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] The present invention provides an injection molded double-sealed longitudinal pressure-bearing wet plug socket, please refer to Figure 1 and Figure 2 The socket comprises a socket housing 1, a back-tightening nut 4, a pin 5, a hard insulator 6, a retaining spring 7, and a socket seal 8. The double-sealing structure is adopted to realize the longitudinal pressure bearing and wet plugging functions. The structure is described in detail below.

[0035] The inner cavity of the socket housing 1 is provided with a hard insulating component, please refer to Figure 3 The hard insulating component is formed by a hard insulator 6 and a plurality of plug pins 5, and the hard insulating component is limited in the socket housing 1 by a front end clip 7 and a rear end step I 102, and the clip slot 7 is arranged in the clip slot 101 of the socket housing 1. With the plug-in end of the socket as the front end, the front end and the front section of the hard insulating component are coated with an injection-molded socket sealing body 8, and the socket sealing body 8 is bonded to the socket housing 1, the clip 7, and the front end of the plug pin 5 as a whole, so as to realize the first layer of sealing inside the socket; a first wedge-shaped space 901 is arranged between the front section of the hard insulator 6 and the socket housing 1, and a second wedge-shaped space 902 is arranged between the hard insulator 6 and the plug pin 5, and the socket sealing body 8 fills the first wedge-shaped space 901 and the second wedge-shaped space 902, so as to realize the second layer of sealing inside the socket.

[0036] Please note that, please refer to Figure 3 and Figure 4 The front section of the outer peripheral wall of the hard insulator 6 is provided with a plurality of wedge-shaped grooves 603 which are deep in front and shallow in the back. The inner wall of the wedge-shaped groove 603 and the connecting section between two adjacent wedge-shaped grooves 603 form a closed wavy curved surface, and the closed wavy curved surface and the inner wall of the socket housing 1 form a first wedge-shaped space 901. The wedge-shaped grooves 603 are provided to facilitate the molding material to flow into the gap between the hard insulator 6 and the socket housing 1 during injection, and also to improve the bonding strength between the hard insulator 6 and the socket sealing body 8.

[0037] The hard insulator 6 is provided with a plurality of mounting holes 604 for mounting the pins 5. The mounting holes 604 include a tapered step hole section located at the front section and an equal-diameter hole section located at the middle and rear sections. A second wedge-shaped space 902 is formed between the inner wall of the tapered step hole section and the pins 5. The number of the second wedge-shaped spaces 902 is consistent with the number of the pins 5.

[0038] Specifically, please refer to Figure 2 The injection-molded socket seal 8 includes a rubber sheath 801 that cooperates with the front end of the pin 5, a connecting section 802 formed at the front end of the hard insulator, a first wedge-shaped structure 803 that fills the first wedge-shaped space 901, and a plurality of second wedge-shaped structures 804 that fill the second wedge-shaped space 902 and are arranged on the rear end surface of the connecting section 802.

[0039] Preferably, a stop surface facing the front end is provided on the inner wall of the tapered step hole section in the mounting hole 604, and a step II 501 matching the stop surface is provided on the insertion pin 5 to prevent the insertion pin 5 from moving backwards.

[0040] Please refer to Figure 2 The rear end of the hard insulator 6 is provided with a step III 601 that matches the step I 102, and a convex key 602 is provided on the step III 601, and the convex key 602 matches the keyway on the step I 102 to limit the circumferential installation angle. Figure 2 After being forcibly installed to the hard insulator 6 in the pressure direction, a hard insulating component is formed, and then the whole is installed into the socket housing 1 from front to back. At this time, in the pressure direction, all parts transmit the force to the socket housing 1 step by step through step II 501 to step III 601, thereby realizing the pressure-bearing function of the socket.

[0041] The socket housing 1 is sealed with the mounting panel of the socket through the end face O-ring 2 and the radial O-ring 3 and is locked through the back-tightening nut 4 to achieve external sealing installation of the socket.

[0042] In the socket of the present invention, the pin 5 and the hard insulator 6 are assembled as a whole to form a hard insulating component, which is fixed in the socket housing 1 by the retaining spring 7. After the socket housing 1, the pin 5, the hard insulator 6 and the retaining spring 7 are assembled, the whole is put into a mold for vulcanization process to form the socket sealing body 8. The socket housing 1, the pin 5, the hard insulator 6 and the retaining spring 7 are bonded as a whole by utilizing the unique structure of the socket sealing body 8 after molding, which plays the following four roles: (1) Each pin 5 has a relatively independent rubber coating, which forms an independent seal between the pins after being plugged into the plug 10, ensuring that the socket can work normally in a flooded or dirty environment; (2) The front of the socket sealing body 8 is The pin 5 and the socket housing 1 are bonded to form a watertight whole, and the bonding principle is used to play the first layer of longitudinal sealing function of the socket; (3) the socket sealing body 8 firmly bonds the retaining spring 7 to the retaining spring groove 101 of the socket housing 1, and plays the role of preventing the retaining spring 7 from loosening; (4) after the rear part of the socket sealing body 8 is formed, the "first wedge-shaped space 901 between the hard insulator 6 and the socket housing 1" and the "second wedge-shaped space 902 between the hard insulator 6 and the pin 5" are filled. By utilizing the incompressible property of rubber volume, when the rubber is subjected to the water pressure from the mating end face, the rubber is subjected to an extrusion force in the wedge-shaped space that is positively correlated with the external pressure, and this extrusion force can play the second layer of sealing function of the socket.

[0043] The injection-molded double-sealed longitudinal pressure-bearing wet plug-in socket of the present invention has a simple structure and is easy to assemble. By injecting and coating the socket seal body at the front end and front part of the hard insulating component, it is possible to achieve wet plug-in function while being suitable for high water pressure environment pressure, and at the same time, the unique socket seal body structure is used to achieve sealing redundancy function, further improving the reliability of the socket.

[0044] On the other hand, the present invention provides a connector, please refer to Figure 5 and Figure 6 The connector includes a plug 10 and the above-mentioned socket. The plug 10 also includes an injection-molded plug seal and a socket 11 that can be interference-fitted with the pin 5. The inner wall of the socket 11 is designed with an interference rib structure 1101, which can cooperate with the pin 5 on the front end of the socket wrapped with a rubber sheath 801 to achieve independent sealing structures between different hole positions after insertion, so as to adapt to the wet plug-in and pull-out operation of the product in a dirty and watery environment.

[0045] The technical solution of the present invention is described in detail above. The principle and specific implementation methods of the present invention are described in this article using specific examples. The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this field, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. An injection molded double-sealed longitudinal pressure-bearing wet-plug socket, characterized in that: The socket housing (1) comprises a hard insulating component formed by a hard insulator (6) and a plug pin (5) being assembled in an inner cavity of the socket housing (1), the plug end of the socket being the front end, the front end and the front section of the hard insulating component being coated with an injection-molded socket sealing body (8), the socket sealing body (8) being bonded to the socket housing (1) and the front end of the plug pin (5) as a whole, thereby realizing a first layer of sealing inside the socket; A first wedge-shaped space (901) is provided between the front section of the hard insulator (6) and the socket housing (1), a second wedge-shaped space (902) is provided between the hard insulator (6) and the plug pin (5), and the socket sealing body (8) fills the first wedge-shaped space (901) and the second wedge-shaped space (902), thereby realizing a second layer of sealing inside the socket.

2. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 1, characterized in that: The front section of the outer peripheral wall of the hard insulator (6) is provided with at least one wedge-shaped groove (603) which is deep in the front and shallow in the rear, and a first wedge-shaped space (901) is enclosed between the front section of the outer peripheral wall of the hard insulator (6) and the inner wall of the socket housing (1).

3. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 2, characterized in that: A plurality of wedge-shaped grooves (603) are evenly distributed on the front section of the outer peripheral wall of the hard insulator (6).

4. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 1, characterized in that: The hard insulator (6) is provided with a mounting hole (604) for mounting the plug pin (5), the mounting hole (604) comprising a tapered step hole section located at the front section and a hole section of equal diameter located at the middle and rear section, and a second wedge-shaped space (902) is formed between the inner wall of the tapered step hole section and the plug pin (5).

5. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 4, characterized in that: The insertion pin (5) is provided with a step II (501) which matches with a stop surface in the conical step hole section facing the front end, so as to prevent the insertion pin (5) from moving backwards.

6. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 1, characterized in that: The hard insulator (6) is restricted in the socket housing (1) by a retaining spring (7) at the front end and a step I (102) at the rear end.

7. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 6, characterized in that: The rear end of the hard insulator (6) is provided with a step III (601) that cooperates with the step I (102), and a convex key (602) is provided on the step III (601). The circumferential installation angle is limited by the cooperation between the convex key (602) and the keyway on the step I (102).

8. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 1, characterized in that: The retaining spring (7) is bonded into the retaining spring groove (101) of the socket housing (1) through the socket sealing body (8).

9. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 1, characterized in that: The socket housing (1) is sealed with the socket installation panel via an end face O-ring (2) and is locked via a back-tightening nut (4), thereby achieving external sealing installation of the socket.

10. The injection molded double-sealed longitudinal pressure-bearing wet-plug socket according to claim 9, characterized in that: A radial O-ring (3) is also provided between the socket housing (1) and the mounting panel of the socket.

11. A connector, characterized in that: It comprises a plug (10) and a socket as claimed in any one of claims 1 to 10.

12. A connector according to claim 11, characterized in that: The plug (10) is provided with a socket (11) corresponding to the plug pin (5), the socket sealing body (8) comprises a rubber sheath (801) wrapped around the front end of the plug pin (5), and the plug pin (5) with the rubber sheath (801) wrapped around the front end is interference fit with the corresponding socket (11).

13. A connector according to claim 12, characterized in that: An interference rib (1101) that cooperates with the insertion pin (5) is provided on the inner wall of the insertion hole (11).

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