Terminal, electrical connection assembly, and electrical connection product

Abstract

The present invention discloses a terminal, an electrical connection assembly, and an electrical connection product, in which an injection-molded seal can be firmly bonded to a terminal body, and no gap is generated between the injection-molded seal and the terminal body, thereby improving waterproof sealing performance.SOLUTION: The terminal includes a terminal body having a cylindrical portion 10, and an injection-molded seal injection-molded on the cylindrical portion 10 to seal a mounting hole and an inner cavity of the cylindrical portion 10. An opening is formed on a peripheral wall of the barrel 10, to allow an injection-molded material for forming the injection-molded seal to enter an inner cavity of the barrel 10 through the opening, so as to seal the inner cavity of the barrel 10, the barrel 10 has an injection-molded area bonded to the injection-molded seal, a layer of sealant is applied on a surface of the injection-molded area of the barrel 10, and the sealant is bonded between the barrel 10 and the injection-molded seal.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Chinese Patent Application No. CN202411097389.6, filed with the State Intellectual Property Office of China on August 9, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a terminal, an electrical connection assembly including the terminal, and an electrical connection product including the terminal or the electrical connection assembly. [Background technology]

[0003] In the prior art, a charging dock adapted to mate with a charging gun is typically installed on a new energy vehicle to charge the battery of the new energy vehicle. Typically, a female charging terminal is disposed on the insulating shell of the charging dock, and the charging gun is provided with a male charging terminal adapted to mate with the female charging terminal of the charging dock. The female charging terminal typically includes a cylindrical terminal body, a cage-shaped elastic contact inserted into the internal cavity of the terminal body, a solder tail connected to the rear end of the terminal body, and an injection-molded seal formed on the terminal body. The seal is configured to seal a terminal mounting hole in the insulating shell of the charging dock to prevent moisture and dust from entering the interior of the charging dock through the terminal mounting hole. In the prior art, the injection-molded seal is typically bonded directly to the surface of the terminal body. Because the injection-molded seal and the terminal body are made from different materials and have different thermal expansion coefficients, gaps are likely to form between the injection-molded seal and the terminal body due to the effects of thermal expansion and cold contraction, thereby reducing the waterproof seal. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made to overcome or mitigate at least one aspect of the above disadvantages. [Means for solving the problem]

[0005] According to an aspect of the present invention, a terminal is provided. The terminal is suitable for insertion into a mounting hole in an insulating shell. The terminal includes a terminal body having a cylindrical portion and an injection-molded seal injection-molded into the cylindrical portion to seal the mounting hole and the internal cavity of the cylindrical portion. An opening is formed in a peripheral wall of the cylindrical portion to allow injection molding material for forming the injection-molded seal to enter the internal cavity of the cylindrical portion through the opening and seal the internal cavity of the cylindrical portion. The cylindrical portion has an injection-molded region bonded to the injection-molded seal. A layer of sealant is applied to a surface of the injection-molded region of the cylindrical portion, the sealant being bonded between the cylindrical portion and the injection-molded seal.

[0006] According to an exemplary embodiment of the present invention, a hydrophilic plating is formed on the surface of the injection molded region of the cylindrical portion of the terminal body, and a layer of sealant is applied to the hydrophilic plating.

[0007] According to another exemplary embodiment of the present invention, the hydrophilic plating is a tin or silver plating electroplated onto the surface of the injection molded region of the barrel of the terminal body.

[0008] According to another exemplary embodiment of the present invention, the hydrophilic plating is a matte or bright tin layer electroplated onto the surface of the injection molded region of the cylindrical portion of the terminal body.

[0009] According to another exemplary embodiment of the present invention, at least a portion of the surface of the injection-molded region of the cylindrical portion of the terminal body is an uneven rough surface to enhance the bond strength between the terminal body and the injection-molded seal.

[0010] According to another exemplary embodiment of the present invention, indentations, depressions, grooves, protrusions, or rolled patterns are formed on at least a portion of the surface of the injection molded region of the cylindrical portion of the terminal body.

[0011] According to another exemplary embodiment of the present invention, at least a portion of the surface of the injection molded region of the cylindrical portion of the terminal body is eroded by plasma gas to increase the roughness of at least a portion of the surface.

[0012] According to another exemplary embodiment of the present invention, through holes and / or slot holes for engaging with the injection-molded seal are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion of the terminal body to increase the bond strength between the terminal body and the injection-molded seal.

[0013] According to another exemplary embodiment of the present invention, a plurality of through holes and / or a plurality of arc-shaped slot holes distributed in an array are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion of the terminal body.

[0014] According to another exemplary embodiment of the present invention, the openings are arcuate and extend circumferentially around the cylindrical portion, and a pair of openings are formed in the cylindrical portion, the pair of openings being spaced apart axially around the cylindrical portion.

[0015] According to another exemplary embodiment of the present invention, the cylindrical portion has an arcuate bridge between the pair of openings, the arcuate bridge being embedded in the injection molded seal.

[0016] According to another exemplary embodiment of the present invention, the cylindrical portion of the terminal body has a front end and a rear end that are axially opposite to each other in the cylindrical portion, the front end of the cylindrical portion is configured to mate with an inserted mating terminal, and an injection-molded seal is formed at the rear end of the cylindrical portion.

[0017] According to another exemplary embodiment of the present invention, a plurality of contact spring arms are formed on the peripheral wall of the cylindrical portion, and the plurality of contact spring arms extend obliquely into the internal cavity of the cylindrical portion to make electrical contact with a mating terminal inserted into the internal cavity of the cylindrical portion.

[0018] According to another exemplary embodiment of the present invention, the terminal further comprises a resilient contact inserted into the internal cavity of the cylindrical portion and electrically contacting the inner wall surface of the cylindrical portion, the resilient contact being an integral stamping-molded part and adapted to electrically contact a mating terminal inserted into the internal cavity of the cylindrical portion.

[0019] According to another exemplary embodiment of the present invention, the resilient contact includes a pair of annular ends that electrically contact the inner wall surface of the cylindrical portion, and a plurality of resilient arms connected between the pair of annular ends, the plurality of resilient arms being spaced apart circumferentially about the annular ends for electrically contacting the outer peripheral surface of an inserted mating terminal.

[0020] According to another exemplary embodiment of the present invention, the annular end of the resilient contact is C-shaped and the resilient arms are inwardly arced, so that the resilient contact is resiliently deformable in the radial and axial directions of the resilient contact.

[0021] According to another exemplary embodiment of the present invention, a plurality of contact projections are formed on the outer peripheral surface of the annular end, the plurality of contact projections being spaced apart across the outer peripheral surface of the annular end for making electrical contact with the inner wall surface of the cylindrical portion.

[0022] According to another exemplary embodiment of the present invention, the inner wall surface of the cylindrical portion is formed with a plurality of front positioning protrusions spaced apart circumferentially of the cylindrical portion and a plurality of rear positioning protrusions spaced apart circumferentially of the cylindrical portion, and the front positioning protrusions and the rear positioning protrusions are adapted to abut against a pair of annular ends of the resilient contact, respectively, to position the resilient contact in the axial direction.

[0023] According to another exemplary embodiment of the present invention, a locking tab is formed on a peripheral wall of the cylindrical portion of the terminal body, the locking tab being configured to lock the terminal into the mounting hole in the insulating shell.

[0024] According to another exemplary embodiment of the present invention, an outwardly protruding guide key is formed at the front end of the cylindrical portion of the terminal body, and the guide key is configured to cooperate with a guide groove in the insulating shell to guide the terminal so that it is inserted into the mounting hole in the insulating shell in the correct orientation.

[0025] According to another exemplary embodiment of the present invention, the terminal body further includes a connection portion connected to the rear end of the cylindrical portion, the connection portion being configured to electrically connect to a cable.

[0026] According to another exemplary embodiment of the present invention, the connection portion of the terminal body is flat and adapted to be soldered to one end of the cable to electrically connect to the cable.

[0027] According to another exemplary embodiment of the present invention, the connection portion of the terminal body is adapted to be crimped onto one end of a cable to electrically connect to the cable.

[0028] According to another exemplary embodiment of the present invention, the terminal body is an integrally pressed molded part, the cylindrical portion of the terminal body has a joint gap, and a sealant is filled into the joint gap in the injection-molded area of ​​the cylindrical portion to seal the joint gap in the injection-molded area of ​​the cylindrical portion.

[0029] According to another exemplary embodiment of the present invention, the injection molded seal is made from self-adhesive silicone.

[0030] According to another exemplary embodiment of the present invention, the injection-molded seal includes a cylindrical body portion joined to the peripheral wall of the cylindrical portion of the terminal body, and a pair of reinforcing protrusions formed on the front end surface and rear end surface of the body portion, respectively, wherein the reinforcing protrusions are arc-shaped and joined to the peripheral wall of the cylindrical portion of the terminal body to increase the bonding strength between the injection-molded seal and the terminal body.

[0031] According to another exemplary embodiment of the present invention, the peripheral wall of the injection-molded area of ​​the cylindrical portion of the terminal body is embedded in the main body portion of the injection-molded seal and a pair of reinforcing protrusions, and the reinforcing protrusions have a predetermined width in the axial direction of the cylindrical portion and a predetermined length in the circumferential direction of the cylindrical portion.

[0032] In accordance with another exemplary embodiment of the present invention, the injection-molded seal further includes a plurality of axially spaced annular sealing ribs formed on the outer peripheral surface of the body portion, the annular sealing ribs configured to provide an interference fit with the inner wall surface of the mounting hole in the insulating shell to provide a seal between the injection-molded seal and the inner wall surface of the mounting hole.

[0033] According to another aspect of the present invention, there is provided an electrical connection assembly comprising the above-described terminal having a connection portion connected to a rear end of the cylindrical portion of the terminal body of the terminal, and a cable crimped or soldered to the connection portion of the terminal.

[0034] According to another aspect of the present invention, there is provided an electrical connection product comprising an insulating shell having a mounting hole formed therein, and the above-described terminal or electrical connection assembly, wherein the terminal is inserted into the mounting hole of the insulating shell, and an injection-molded seal seals the mounting hole of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting hole.

[0035] According to another exemplary embodiment of the present invention, the electrical connection product is a connector, a charging dock, or a charging gun.

[0036] In each of the above exemplary embodiments according to the present disclosure, a layer of sealant is applied to the surface of the injection-molded area of ​​the cylindrical portion of the terminal body, thereby allowing the injection-molded seal to be firmly bonded to the terminal body and preventing gaps from occurring between the injection-molded seal and the terminal body, thereby improving the waterproof seal.

[0037] In some of the above exemplary embodiments according to the present disclosure, the joint gap in the injection-molded area of ​​the cylindrical portion of the terminal body is sealed by filling the joint gap in the injection-molded area of ​​the cylindrical portion, thereby further improving the waterproof seal.

[0038] These and other features of the present invention will become more apparent from the detailed description of illustrative embodiments of the invention taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0039] [Figure 1] 1 is a diagrammatic perspective view of a terminal according to a first exemplary embodiment of the present disclosure; [Figure 2] 1 is an axial cross-sectional view of a terminal according to a first exemplary embodiment of the present disclosure. [Figure 3] 1 is an exploded cross-sectional view of a terminal according to a first exemplary embodiment of the present disclosure. [Figure 4] 1 is an illustrative exploded top view of a terminal according to a first exemplary embodiment of the present disclosure; FIG. [Figure 5] 1 is an illustrative exploded view, viewed from below, of a terminal according to a first exemplary embodiment of the present disclosure; FIG. [Figure 6] FIG. 10 is a diagrammatic perspective view of a terminal according to a second exemplary embodiment of the present disclosure. [Figure 7] FIG. 10 is an axial cross-sectional view of a terminal according to a second exemplary embodiment of the present disclosure. [Figure 8] FIG. 10 is an illustrative exploded view of a terminal according to a second exemplary embodiment of the present disclosure. [Figure 9] FIG. 10 is an exploded cross-sectional view of a terminal according to a second exemplary embodiment of the present disclosure. [Figure 10] FIG. 10 is a diagrammatic perspective view of a terminal according to a third exemplary embodiment of the present disclosure. [Figure 11] FIG. 10 is an axial cross-sectional view of a terminal according to a third exemplary embodiment of the present disclosure. [Figure 12] FIG. 10 is an illustrative exploded view of a terminal according to a third exemplary embodiment of the present disclosure. [Figure 13]FIG. 10 is an exploded cross-sectional view of a terminal according to a third exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0040] Exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

[0041] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are diagrammatically shown to simplify the drawings.

[0042] In accordance with a general aspect of the present invention, a terminal is provided. The terminal is adapted to be inserted into a mounting hole in an insulating shell. The terminal includes a terminal body having a cylindrical portion and an injection-molded seal injection-molded into the cylindrical portion for sealing the mounting hole and the internal cavity of the cylindrical portion. An opening is formed in a peripheral wall of the cylindrical portion to allow injection molding material for forming the injection-molded seal to enter the internal cavity of the cylindrical portion through the opening and seal the internal cavity of the cylindrical portion. The cylindrical portion has an injection-molded region bonded to the injection-molded seal. A layer of sealant is applied to a surface of the injection-molded region of the cylindrical portion, the sealant being bonded between the cylindrical portion and the injection-molded seal.

[0043] According to another general aspect of the present invention, there is provided an electrical connection assembly comprising the above-described terminal having a connection portion connected to a rear end of the cylindrical portion of the terminal body of the terminal, and a cable crimped or soldered to the connection portion of the terminal.

[0044] According to another general aspect of the present invention, there is provided an electrical connection product comprising an insulating shell having a mounting hole formed therein, and the terminal or electrical connection assembly described above, wherein the terminal is inserted into the mounting hole of the insulating shell, and an injection-molded seal seals the mounting hole of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting hole.

[0045] Figures 1 to 5 show a first embodiment according to the present disclosure. Of Figures 1 to 5, Figure 1 shows an explanatory perspective view of a terminal according to the first exemplary embodiment of the present disclosure, Figure 2 shows an axial cross-sectional view of the terminal according to the first exemplary embodiment of the present disclosure, Figure 3 shows an exploded cross-sectional view of the terminal according to the first exemplary embodiment of the present disclosure, Figure 4 shows an explanatory exploded view of the terminal according to the first exemplary embodiment of the present disclosure as viewed from above, and Figure 5 shows an explanatory exploded view of the terminal according to the first exemplary embodiment of the present disclosure as viewed from below.

[0046] As shown in FIGS. 1 to 5 , an exemplary embodiment of the present invention discloses a terminal. The terminal is suitable for insertion into a mounting hole (not shown) in an insulating shell (not shown). The terminal includes a terminal body 1 and an injection-molded seal 2. The terminal body 1 has a cylindrical portion 10. The injection-molded seal 2 is injection-molded into the cylindrical portion 10 to seal the mounting hole and the internal cavity of the cylindrical portion 10. An opening 101 is formed in the peripheral wall of the cylindrical portion 10 to allow an injection molding material for forming the injection-molded seal 2 to enter the internal cavity of the cylindrical portion 10 through the opening 101 and seal the internal cavity of the cylindrical portion 10. The cylindrical portion 10 of the terminal body 1 has an injection-molded region bonded to the injection-molded seal 2, and a layer of sealant is applied to the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1, and the sealant is bonded between the cylindrical portion 10 of the terminal body 1 and the injection-molded seal 2.

[0047] As shown in FIGS. 1 to 5, in the illustrated embodiment, a hydrophilic plating is formed on the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1, and a layer of sealant is applied to the hydrophilic plating.

[0048] As shown in FIGS. 1 to 5, in the illustrated embodiment, the hydrophilic plating is tin plating or silver plating electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0049] As shown in FIGS. 1 to 5, in the illustrated embodiment, the hydrophilic plating is a matte tin layer or a bright tin layer electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0050] As shown in Figures 1 to 5, in the illustrated embodiment, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 has an uneven, rough surface to increase the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0051] 1 to 5, in the illustrated embodiment, indentations, depressions, grooves, protrusions, or rolled patterns 10b (see FIGS. 6 to 13) are formed on at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1. For example, in an exemplary embodiment of the present invention, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is eroded by plasma gas (i.e., etching treatment) to increase the roughness of at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0052] As shown in Figures 1 to 5, in the illustrated embodiment, through holes and / or slot holes 10a for engaging with the injection-molded seal 2 are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1, thereby increasing the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0053] As shown in Figures 1 to 5, in the illustrated embodiment, a plurality of through holes and / or a plurality of arc-shaped slot holes 10a distributed in an array are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1.

[0054] As shown in Figures 1 to 5, in the illustrated embodiment, the openings 101 are arc-shaped and extend circumferentially around the cylindrical portion 10, and a pair of openings 101 are formed in the cylindrical portion 10, and the pair of openings 101 are spaced apart in the axial direction of the cylindrical portion 10.

[0055] As shown in FIGS. 1 to 5, in the illustrated embodiment, the cylindrical portion 10 has an arc-shaped bridge 102 between a pair of openings 101, and the arc-shaped bridge 102 is embedded in the injection-molded seal 2.

[0056] As shown in Figures 1 to 5, in the illustrated embodiment, the cylindrical portion 10 of the terminal body 1 has a front end and a rear end that are opposite to each other in the axial direction of the cylindrical portion 10, and the front end of the cylindrical portion 10 is configured to fit into an inserted mating terminal, and the injection-molded seal 2 is formed at the rear end of the cylindrical portion 10.

[0057] As shown in Figures 1 to 5, in the illustrated embodiment, a plurality of contact spring arms 11 are formed on the peripheral wall of the cylindrical portion 10, and the plurality of contact spring arms 11 extend obliquely into the internal cavity of the cylindrical portion 10 to make electrical contact with a mating terminal inserted into the internal cavity of the cylindrical portion 10.

[0058] As shown in Figures 1 to 5, in the illustrated embodiment, a locking tab 12 is formed on the peripheral wall of the cylindrical portion 10 of the terminal body 1, and the locking tab 12 is configured to lock the terminal into the mounting hole of the insulating shell.

[0059] As shown in Figures 1 to 5, in the illustrated embodiment, an outwardly protruding guide key 13 is formed at the front end of the cylindrical portion 10 of the terminal body 1, and the guide key 13 is configured to cooperate with a guide groove in the insulating shell to guide the terminal so that it is inserted into the mounting hole in the insulating shell in the correct orientation.

[0060] As shown in Figures 1 to 5, in the illustrated embodiment, the terminal body 1 further has a connection portion 14 (see Figures 6 to 13) connected to the rear end of the cylindrical portion 10, and the connection portion 14 is configured to be electrically connected to a cable (not shown).

[0061] As shown in FIGS. 1 to 5, in the illustrated embodiment, the connection portion 14 of the terminal body 1 is flat and adapted to be soldered to one end of a cable to electrically connect to the cable.

[0062] As shown in FIGS. 1 to 5, in the illustrated embodiment, the connection portion 14 of the terminal body 1 is adapted to be crimped onto one end of a cable and to be electrically connected to the cable.

[0063] As shown in Figures 1 to 5, in the illustrated embodiment, the terminal body 1 is an integrally press-molded part, and the cylindrical portion 10 of the terminal body 1 has a joint gap 10f, and a sealant is filled into the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10 to seal the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10.

[0064] As shown in Figures 1-5, in the illustrated embodiment, the injection molded seal 2 is made from self-adhesive silicone.

[0065] As shown in FIGS. 1 to 5, in the illustrated embodiment, the injection-molded seal 2 includes a main body 20 and a pair of reinforcing protrusions 21. The main body 20 is cylindrical and is joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1. The pair of reinforcing protrusions 21 are formed on the front and rear end surfaces of the main body 20. The reinforcing protrusions 21 are arc-shaped and are joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1 to increase the bonding strength between the injection-molded seal 2 and the terminal body 1.

[0066] 1 to 5, in the illustrated embodiment, the peripheral wall of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is embedded in the main body portion 20 of the injection-molded seal 2 and a pair of reinforcing protrusions 21. The reinforcing protrusions 21 have a predetermined width in the axial direction of the cylindrical portion 10 and a predetermined length in the circumferential direction of the cylindrical portion 10.

[0067] 1-5, in the illustrated embodiment, the injection-molded seal 2 further includes a plurality of axially spaced annular sealing ribs 22 formed on the outer peripheral surface of the main body 20. The annular sealing ribs 22 are configured to provide a tight fit with the inner wall surface of the mounting hole of the insulating shell to provide a seal between the injection-molded seal 2 and the inner wall surface of the mounting hole.

[0068] As shown in Figures 1 to 5, another exemplary embodiment of the present invention also discloses an electrical connection assembly. The electrical connection assembly includes the above-described terminal and a cable (not shown). The terminal has a connection portion 14 connected to the rear end of the cylindrical portion 10 of the terminal body 1. The cable is crimped or soldered to the connection portion 14 of the terminal.

[0069] As shown in Figures 1 to 5, another exemplary embodiment of the present invention also discloses an electrical connection product. The electrical connection product includes an insulating shell and the above-mentioned terminal or the above-mentioned electrical connection assembly. The insulating shell has a mounting hole formed therein. The terminal is inserted into the mounting hole of the insulating shell, and an injection-molded seal 2 seals the mounting hole of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting hole.

[0070] As shown in FIGS. 1 to 5, in the illustrated embodiments, the electrical connection product is a connector, a charging dock, or a charging gun.

[0071] Figures 6 to 9 show a second embodiment according to the present disclosure. Of Figures 6 to 9, Figure 6 shows an illustrative perspective view of a terminal according to the second exemplary embodiment of the present disclosure, Figure 7 shows an axial cross-sectional view of the terminal according to the second exemplary embodiment of the present disclosure, Figure 8 shows an illustrative exploded view of the terminal according to the second exemplary embodiment of the present disclosure, and Figure 9 shows an exploded cross-sectional view of the terminal according to the second exemplary embodiment of the present disclosure.

[0072] As shown in FIGS. 6 to 9 , an exemplary embodiment of the present invention discloses a terminal. The terminal is suitable for insertion into a mounting hole (not shown) in an insulating shell (not shown). The terminal includes a terminal body 1 and an injection-molded seal 2. The terminal body 1 has a cylindrical portion 10. The injection-molded seal 2 is injection-molded into the cylindrical portion 10 to seal the mounting hole and the internal cavity of the cylindrical portion 10. An opening 101 is formed in the peripheral wall of the cylindrical portion 10 to allow an injection molding material for forming the injection-molded seal 2 to enter the internal cavity of the cylindrical portion 10 through the opening 101 and seal the internal cavity of the cylindrical portion 10. The cylindrical portion 10 of the terminal body 1 has an injection-molded region bonded to the injection-molded seal 2, and a layer of sealant is applied to the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1, and the sealant is bonded between the cylindrical portion 10 of the terminal body 1 and the injection-molded seal 2.

[0073] As shown in FIGS. 6 to 9, in the illustrated embodiment, a hydrophilic plating is formed on the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1, and a layer of sealant is applied to the hydrophilic plating.

[0074] As shown in FIGS. 6 to 9, in the illustrated embodiment, the hydrophilic plating is tin plating or silver plating electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0075] As shown in FIGS. 6 to 9, in the illustrated embodiment, the hydrophilic plating is a matte tin layer or a bright tin layer electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0076] As shown in Figures 6 to 9, in the illustrated embodiment, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 has an uneven, rough surface to increase the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0077] 6 to 9, in the illustrated embodiments, indentations, depressions, grooves, protrusions, or rolled patterns 10b are formed on at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1. For example, in an exemplary embodiment of the present invention, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is eroded by plasma gas (i.e., etching treatment) to increase at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0078] As shown in Figures 6 to 9, in the illustrated embodiment, through holes and / or slot holes 10a (see Figures 1 to 5) for engaging with the injection-molded seal 2 are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1, thereby increasing the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0079] As shown in Figures 6 to 9, in the illustrated embodiment, a plurality of through holes and / or a plurality of arc-shaped slot holes 10a distributed in an array are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1.

[0080] As shown in Figures 6 to 9, in the illustrated embodiment, the openings 101 are arc-shaped and extend circumferentially around the cylindrical portion 10, and a pair of openings 101 are formed in the cylindrical portion 10, and the pair of openings 101 are spaced apart in the axial direction of the cylindrical portion 10.

[0081] As shown in FIGS. 6 to 9, in the illustrated embodiment, the cylindrical portion 10 has an arc-shaped bridge 102 between a pair of openings 101, and the arc-shaped bridge 102 is embedded in the injection-molded seal 2.

[0082] As shown in Figures 6 to 9, in the illustrated embodiment, the cylindrical portion 10 of the terminal body 1 has a front end and a rear end that are opposite to each other in the axial direction of the cylindrical portion 10, and the front end of the cylindrical portion 10 is configured to fit into an inserted mating terminal, and the injection-molded seal 2 is formed at the rear end of the cylindrical portion 10.

[0083] 6 to 9, in the illustrated embodiment, the terminal further includes a resilient contact 3, which is inserted into the internal cavity of the cylindrical portion 10 and makes electrical contact with the inner wall surface of the cylindrical portion 10. The resilient contact 3 is an integrally pressed molded part and is adapted to make electrical contact with a mating terminal inserted into the internal cavity of the cylindrical portion 10.

[0084] 6 to 9, in the illustrated embodiment, the resilient contact 3 includes a pair of annular ends 31 and a plurality of resilient arms 32. The pair of annular ends 31 are in electrical contact with the inner wall surface of the cylindrical portion 10. The plurality of resilient arms 32 are connected between the pair of annular ends 31. The plurality of resilient arms 32 are spaced apart in the circumferential direction of the annular end 31 so as to be in electrical contact with the outer circumferential surface of the inserted mating terminal.

[0085] As shown in Figures 6 to 9, in the illustrated embodiment, the annular end 31 of the resilient contact 3 is C-shaped and the resilient arms 32 are inwardly arc-shaped, so that the resilient contact 3 can be resiliently deformed in the radial and axial directions of the resilient contact 3.

[0086] As shown in Figures 6 to 9, in the illustrated embodiment, multiple contact protrusions 3a are formed on the outer peripheral surface of the annular end 31, and the multiple contact protrusions 3a are spaced apart across the entire outer peripheral surface of the annular end 31 to make electrical contact with the inner wall surface of the cylindrical portion 10.

[0087] 6 to 9, in the illustrated embodiment, a plurality of front positioning protrusions 10c spaced apart in the circumferential direction of the cylindrical portion 10 and a plurality of rear positioning protrusions 10d spaced apart in the circumferential direction of the cylindrical portion 10 are formed on the inner wall surface of the cylindrical portion 10. The front positioning protrusions 10c and the rear positioning protrusions 10d are adapted to abut against the pair of annular end portions 31 of the resilient contacts 3, respectively, to position the resilient contacts 3 in the axial direction.

[0088] As shown in Figures 6 to 9, in the illustrated embodiment, a locking tab 12 is formed on the peripheral wall of the cylindrical portion 10 of the terminal body 1, and the locking tab 12 is configured to lock the terminal into the mounting hole of the insulating shell.

[0089] As shown in Figures 6 to 9, in the illustrated embodiment, the terminal body 1 further has a connection portion 14 connected to the rear end of the cylindrical portion 10, and the connection portion 14 is configured to be electrically connected to a cable (not shown).

[0090] As shown in FIGS. 6 to 9, in the illustrated embodiment, the connection portion 14 of the terminal body 1 is adapted to be crimped onto one end of a cable and to be electrically connected to the cable.

[0091] As shown in Figures 6 to 9, in the illustrated embodiment, the terminal body 1 is an integrally press-molded part, and the cylindrical portion 10 of the terminal body 1 has a joint gap 10f, and a sealant is filled into the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10 to seal the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10.

[0092] As shown in Figures 6-9, in the illustrated embodiment, the injection molded seal 2 is made from self-adhesive silicone.

[0093] As shown in Figures 6 to 9, in the illustrated embodiment, the injection-molded seal 2 includes a main body 20 and a pair of reinforcing protrusions 21. The main body 20 is cylindrical and is joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1. The pair of reinforcing protrusions 21 are formed on the front end surface and rear end surface of the main body 20, respectively. The reinforcing protrusions 21 are arc-shaped and are joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1 to increase the bonding strength between the injection-molded seal 2 and the terminal body 1.

[0094] 6 to 9, in the illustrated embodiment, the peripheral wall of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is embedded in the main body portion 20 of the injection-molded seal 2 and a pair of reinforcing protrusions 21. The reinforcing protrusions 21 have a predetermined width in the axial direction of the cylindrical portion 10 and a predetermined length in the circumferential direction of the cylindrical portion 10.

[0095] 6 to 9, in the illustrated embodiment, the injection-molded seal 2 further includes a plurality of axially spaced annular sealing ribs 22 formed on the outer peripheral surface of the main body 20. The annular sealing ribs 22 are configured to provide a tight fit with the inner wall surface of the mounting hole of the insulating shell to achieve a seal between the injection-molded seal 2 and the inner wall surface of the mounting hole.

[0096] As shown in Figures 6 to 9, an electrical connection assembly is also disclosed in another exemplary embodiment of the present invention. The electrical connection assembly includes the above-mentioned terminal and a cable (not shown). The terminal has a connection portion 14 connected to the rear end of the cylindrical portion 10 of the terminal body 1. The cable is crimped or soldered to the connection portion 14 of the terminal.

[0097] As shown in Figures 6 to 9, another exemplary embodiment of the present invention also discloses an electrical connection product. The electrical connection product includes an insulating shell and the above-mentioned terminal or the above-mentioned electrical connection assembly. Mounting holes are formed in the insulating shell. The terminals are inserted into the mounting holes of the insulating shell, and an injection-molded seal 2 seals the mounting holes of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting holes.

[0098] As shown in FIGS. 6 to 9, in the illustrated embodiments, the electrical connection product is a connector, a charging dock, or a charging gun.

[0099] Figures 10 to 13 show a third embodiment according to the present disclosure. Of Figures 10 to 13, Figure 10 shows an illustrative perspective view of a terminal according to the third exemplary embodiment of the present disclosure, Figure 11 shows an axial cross-sectional view of the terminal according to the third exemplary embodiment of the present disclosure, Figure 12 shows an illustrative exploded view of the terminal according to the third exemplary embodiment of the present disclosure, and Figure 13 shows an exploded cross-sectional view of the terminal according to the third exemplary embodiment of the present disclosure.

[0100] As shown in FIGS. 10 to 13 , an exemplary embodiment of the present invention discloses a terminal. The terminal is suitable for insertion into a mounting hole (not shown) in an insulating shell (not shown). The terminal includes a terminal body 1 and an injection-molded seal 2. The terminal body 1 has a cylindrical portion 10. The injection-molded seal 2 is injection-molded into the cylindrical portion 10 to seal the mounting hole and the internal cavity of the cylindrical portion 10. An opening 101 is formed in the peripheral wall of the cylindrical portion 10 to allow an injection molding material for forming the injection-molded seal 2 to enter the internal cavity of the cylindrical portion 10 through the opening 101 and seal the internal cavity of the cylindrical portion 10. The cylindrical portion 10 of the terminal body 1 has an injection-molded region bonded to the injection-molded seal 2, and a layer of sealant is applied to the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1, and the sealant is bonded between the cylindrical portion 10 of the terminal body 1 and the injection-molded seal 2.

[0101] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, a hydrophilic plating is formed on the surface of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1, and a layer of the sealant is applied to the hydrophilic plating.

[0102] As shown in FIGS. 10 to 13, in the illustrated embodiment of the present invention, the hydrophilic plating is tin plating or silver plating electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0103] As shown in FIGS. 10-13, in the illustrated embodiment of the present invention, the hydrophilic plating is a matte tin or bright tin layer electroplated onto the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0104] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 has an uneven, rough surface to increase the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0105] 10-13, in the illustrated embodiment of the present invention, indentations, depressions, grooves, protrusions, or rolled patterns 10b are formed on at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1. For example, in the exemplary embodiment of the present invention, at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is eroded by plasma gas (i.e., etching treatment) to increase at least a portion of the surface of the injection-molded region of the cylindrical portion 10 of the terminal body 1.

[0106] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, through holes and / or slot holes 10a (see Figures 1 to 5) for engaging with the injection-molded seal 2 are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1, thereby increasing the bonding strength between the terminal body 1 and the injection-molded seal 2.

[0107] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, a plurality of through holes and / or a plurality of arc-shaped slot holes 10a distributed in an array are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion 10 of the terminal body 1.

[0108] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the openings 101 are arc-shaped and extend circumferentially around the cylindrical portion 10, and a pair of openings 101 are formed in the cylindrical portion 10, and the pair of openings 101 are spaced apart in the axial direction of the cylindrical portion 10.

[0109] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the cylindrical portion 10 has an arcuate bridge 102 between a pair of openings 101, and the arcuate bridge 102 is embedded in the injection molded seal 2.

[0110] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the cylindrical portion 10 of the terminal body 1 has a front end and a rear end that are opposite to each other in the axial direction of the cylindrical portion 10, and the front end of the cylindrical portion 10 is configured to fit into an inserted mating terminal, and an injection-molded seal 2 is formed at the rear end of the cylindrical portion 10.

[0111] 10 to 13, in the illustrated embodiment of the present invention, the terminal further includes a resilient contact 3 that is inserted into the internal cavity of the cylindrical portion 10 and that is in electrical contact with the inner wall surface of the cylindrical portion 10. The resilient contact 3 is an integrally pressed molded part and is adapted to be in electrical contact with a mating terminal that is inserted into the internal cavity of the cylindrical portion 10.

[0112] 10 to 13, in the illustrated embodiment of the present invention, the resilient contact 3 includes a pair of annular ends 31 and a plurality of resilient arms 32. The pair of annular ends 31 are in electrical contact with the inner wall surface of the cylindrical portion 10. The plurality of resilient arms 32 are connected between the pair of annular ends 31. The plurality of resilient arms 32 are spaced apart in the circumferential direction of the annular end 31 so as to be in electrical contact with the outer circumferential surface of the inserted mating terminal.

[0113] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the annular end 31 of the resilient contact 3 is C-shaped and the resilient arms 32 are inwardly arcuate, so that the resilient contact 3 is resiliently deformable in the radial and axial directions of the resilient contact 3.

[0114] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, a plurality of contact protrusions 3a are formed on the outer peripheral surface of the annular end 31, and the plurality of contact protrusions 3a are spaced apart across the entire outer peripheral surface of the annular end 31 to electrically contact the inner wall surface of the cylindrical portion 10.

[0115] 10 to 13, in the illustrated embodiment of the present invention, a plurality of front positioning protrusions 10c spaced apart in the circumferential direction of the cylindrical portion 10 and a plurality of rear positioning protrusions 10d spaced apart in the circumferential direction of the cylindrical portion 10 are formed on the inner wall surface of the cylindrical portion 10. The front positioning protrusions 10c and the rear positioning protrusions 10d are adapted to abut against a pair of annular end portions 31 of the resilient contacts 3, respectively, to position the resilient contacts 3 in the axial direction.

[0116] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, a locking tab 12 is formed on the peripheral wall of the cylindrical portion 10 of the terminal body 1, and the locking tab 12 is configured to lock the terminal into the mounting hole of the insulating shell.

[0117] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the terminal body 1 further has a connection portion 14 connected to the rear end of the cylindrical portion 10, and the connection portion 14 is configured to be electrically connected to a cable (not shown).

[0118] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the connection portion 14 of the terminal body 1 is flat and adapted to be soldered to one end of a cable to electrically connect to the cable.

[0119] As shown in Figures 10 to 13, in the illustrated embodiment of the present invention, the terminal body 1 is an integrally press-molded part, the cylindrical portion 10 of the terminal body 1 has a joint gap 10f, and the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10 is filled with a sealant to seal the joint gap 10f in the injection-molded area of ​​the cylindrical portion 10.

[0120] As shown in Figures 10-13, in the illustrated embodiment of the invention, the injection molded seal 2 is made from self-adhesive silicone.

[0121] 10 to 13, in the illustrated embodiment of the present invention, the injection-molded seal 2 includes a main body 20 and a pair of reinforcing protrusions 21. The main body 20 is cylindrical and is joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1. The pair of reinforcing protrusions 21 are formed on the front and rear end surfaces of the main body 20. The reinforcing protrusions 21 are arc-shaped and are joined to the peripheral wall of the cylindrical portion 10 of the terminal body 1 to increase the bonding strength between the injection-molded seal 2 and the terminal body 1.

[0122] 10 to 13, in the illustrated embodiment of the present invention, the peripheral wall of the injection-molded region of the cylindrical portion 10 of the terminal body 1 is embedded in the main body portion 20 of the injection-molded seal 2 and a pair of reinforcing protrusions 21. The reinforcing protrusions 21 have a predetermined width in the axial direction of the cylindrical portion 10 and a predetermined length in the circumferential direction of the cylindrical portion 10.

[0123] 10-13, in the illustrated embodiment of the present invention, injection-molded seal 2 further includes a plurality of axially spaced annular sealing ribs 22 formed on the outer peripheral surface of main body 20. Annular sealing ribs 22 are configured to provide a tight fit with the inner wall surface of the mounting hole in the insulating shell to achieve a seal between injection-molded seal 2 and the inner wall surface of the mounting hole.

[0124] 10 to 13, an electrical connection assembly is also disclosed in another exemplary embodiment of the present invention. The electrical connection assembly includes the above-described terminal and a cable (not shown). The terminal has a connection portion 14 connected to the rear end of the cylindrical portion 10 of the terminal body 1. The cable is crimped or soldered to the connection portion 14 of the terminal.

[0125] As shown in Figures 10 to 13, another exemplary embodiment of the present invention also discloses an electrical connection product. The electrical connection product includes an insulating shell and the above-mentioned terminal or the above-mentioned electrical connection assembly. Mounting holes are formed in the insulating shell. The terminals are inserted into the mounting holes of the insulating shell, and an injection-molded seal 2 seals the mounting holes of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting holes.

[0126] As shown in FIGS. 10 to 13, in the illustrated embodiments, the electrical connection product is a connector, a charging dock, or a charging gun.

[0127] It should be understood by those skilled in the art that the above embodiments are intended to be illustrative and not restrictive. For example, those skilled in the art can make many modifications to the above embodiments without any contradiction in structure or principle, and can freely combine various features described in different embodiments with each other.

[0128] While several exemplary embodiments have been shown and described, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined in the following claims and their equivalents.

[0129] As used herein, elements described in the singular and preceded by the word "a" or "an" should be understood as not excluding a plural of said elements or steps, unless such exclusion is expressly stated. Furthermore, references to "one embodiment" of the invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Furthermore, unless expressly stated otherwise, embodiments "comprising" or "having" an element or elements having a particular characteristic may include additional such elements that do not have that characteristic.

Claims

1. A terminal suitable for insertion into a mounting hole in an insulating shell, said terminal comprising: A terminal body (1) having a cylindrical portion (10); an injection-molded seal (2) that is injection-molded into the cylindrical portion (10) to seal the mounting hole and the internal cavity of the cylindrical portion (10); Equipped with an opening (101) is formed in the peripheral wall of the cylindrical portion (10) to allow injection molding material for forming the injection molded seal (2) to enter the internal cavity of the cylindrical portion (10) through the opening (101) and seal the internal cavity of the cylindrical portion (10); The cylindrical portion (10) has an injection-molded region bonded to the injection-molded seal (2), and a layer of sealant is applied to the surface of the injection-molded region of the cylindrical portion (10), and the sealant is bonded between the cylindrical portion (10) and the injection-molded seal (2).

2. 2. The terminal according to claim 1, wherein a hydrophilic plating is formed on the surface of the injection-molded region of the cylindrical portion (10) of the terminal body (1), and the layer of sealant is applied to the hydrophilic plating.

3. 3. The terminal according to claim 2, wherein the hydrophilic plating is a tin plating or a silver plating electroplated on the surface of the injection-molded region of the cylindrical portion (10) of the terminal body (1).

4. 3. The terminal according to claim 2, wherein the hydrophilic plating is a matte tin layer or a bright tin layer electroplated on the surface of the injection-molded region of the cylindrical portion (10) of the terminal body (1).

5. 2. The terminal according to claim 1, wherein at least a portion of the surface of the injection-molded region of the cylindrical portion (10) of the terminal body (1) is an uneven, rough surface to enhance the bonding strength between the terminal body (1) and the injection-molded seal (2).

6. The terminal according to claim 5, wherein indentations, depressions, grooves, protrusions or rolled patterns (10b) are formed on said at least a portion of said surface of said injection-molded region of said cylindrical portion (10) of said terminal body (1).

7. 6. The terminal according to claim 5, wherein the at least a portion of the surface of the injection-molded region of the cylindrical portion (10) of the terminal body (1) is eroded by plasma gas to increase the roughness of the at least a portion of the surface.

8. 2. The terminal according to claim 1, wherein through holes and / or slot holes (10a) for engaging with the injection-molded seal (2) are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion (10) of the terminal body (1) to increase the bonding strength between the terminal body (1) and the injection-molded seal (2).

9. 9. The terminal according to claim 8, wherein a plurality of through holes and / or a plurality of arc-shaped slot holes (10a) distributed in an array are formed in the peripheral wall of the injection-molded area of ​​the cylindrical portion (10) of the terminal body (1).

10. 2. The terminal according to claim 1, wherein the opening (101) is arc-shaped and extends circumferentially around the cylindrical portion (10), a pair of openings (101) is formed in the cylindrical portion (10), and the pair of openings (101) are spaced apart in the axial direction of the cylindrical portion (10).

11. 11. The terminal according to claim 10, wherein the cylindrical portion (10) has an arcuate bridge (102) between the pair of openings (101), and the arcuate bridge (102) is embedded in the injection-molded seal (2).

12. 2. The terminal according to claim 1, wherein the cylindrical portion (10) of the terminal body (1) has a front end and a rear end that are opposite to each other in the axial direction of the cylindrical portion (10), the front end of the cylindrical portion (10) is configured to fit into an inserted mating terminal, and the injection-molded seal (2) is formed at the rear end of the cylindrical portion (10).

13. 13. The terminal according to claim 12, wherein a plurality of contact spring arms (11) are formed on the peripheral wall of the cylindrical portion (10), and the plurality of contact spring arms (11) extend obliquely into the internal cavity of the cylindrical portion (10) to electrically contact the mating terminal inserted into the internal cavity of the cylindrical portion (10).

14. The device further comprises a resilient contact (3) inserted into the internal cavity of the cylindrical portion (10) and electrically contacting the inner wall surface of the cylindrical portion (10); 13. The terminal according to claim 12, wherein the resilient contact (3) is an integral pressed and molded part and is adapted to make electrical contact with the mating terminal inserted into the internal cavity of the cylindrical portion (10).

15. The elastic contact (3) a pair of annular ends (31) electrically contacting the inner wall surface of the cylindrical portion (10); A plurality of elastic arms (32) connected between the pair of annular ends (31); Including, 15. The terminal of claim 14, wherein the plurality of resilient arms (32) are spaced apart circumferentially around the annular end (31) for electrical contact with an outer peripheral surface of the inserted mating terminal.

16. 16. The terminal according to claim 15, wherein the annular end (31) of the resilient contact (3) is C-shaped and the resilient arms (32) are inwardly arcuate, so that the resilient contact (3) is resiliently deformable in radial and axial directions of the resilient contact (3).

17. 17. The terminal of claim 16, wherein a plurality of contact projections (3 a) are formed on the outer peripheral surface of the annular end (31), the plurality of contact projections (3 a) being spaced apart over the entire outer peripheral surface of the annular end (31) for electrically contacting the inner wall surface of the cylindrical portion (10).

18. a plurality of front positioning protrusions (10c) spaced apart in the circumferential direction of the cylindrical portion (10) and a plurality of rear positioning protrusions (10d) spaced apart in the circumferential direction of the cylindrical portion (10) are formed on the inner wall surface of the cylindrical portion (10); 16. The terminal according to claim 15, wherein the front positioning projection (10c) and the rear positioning projection (10d) are adapted to abut against the pair of annular ends (31) of the resilient contact (3), respectively, to position the resilient contact (3) in the axial direction.

19. 2. The terminal according to claim 1, wherein a locking tab (12) is formed on the peripheral wall of the cylindrical portion (10) of the terminal body (1), the locking tab (12) being configured to lock the terminal into the mounting hole of the insulating shell.

20. 2. The terminal according to claim 1, wherein an outwardly protruding guide key (13) is formed at the front end of the cylindrical portion (10) of the terminal body (1), and the guide key (13) is configured to cooperate with a guide groove of the insulating shell to guide the terminal so that it is inserted into the mounting hole of the insulating shell in the correct orientation.

21. 2. The terminal according to claim 1, wherein the terminal body (1) further comprises a connection portion (14) connected to a rear end of the cylindrical portion (10), the connection portion (14) being configured to be electrically connected to a cable.

22. 22. The terminal according to claim 21, wherein the connection portion (14) of the terminal body (1) is flat and adapted to be soldered to one end of the cable to electrically connect to the cable.

23. 22. The terminal according to claim 21, wherein the connection portion (14) of the terminal body (1) is adapted to be crimped onto one end of the cable to electrically connect to the cable.

24. 24. The terminal according to claim 1, wherein the terminal body (1) is an integrally press-molded part, the cylindrical portion (10) of the terminal body (1) has a joint gap (10f), and the joint gap (10f) in the injection-molded area of ​​the cylindrical portion (10) is filled with a sealant to seal the joint gap (10f) in the injection-molded area of ​​the cylindrical portion (10).

25. Terminal according to any one of the preceding claims, wherein the injection-molded seal (2) is made from self-adhesive silicone.

26. The injection molded seal (2) a main body portion (20) that is cylindrical and is joined to the peripheral wall of the cylindrical portion (10) of the terminal body (1); A pair of reinforcing protrusions (21) formed on the front end surface and the rear end surface of the main body portion (20), respectively; Including, 24. The terminal according to claim 1, wherein the reinforcing protrusion (21) is arc-shaped and is joined to the peripheral wall of the cylindrical portion (10) of the terminal body (1) to enhance the joining strength between the injection-molded seal (2) and the terminal body (1).

27. The peripheral wall of the injection-molded region of the cylindrical portion (10) of the terminal body (1) is embedded in the main body portion (20) and the pair of reinforcing protrusions (21) of the injection-molded seal (2), 27. The terminal according to claim 26, wherein the reinforcing projection (21) has a predetermined width in the axial direction of the cylindrical portion (10) and a predetermined length in the circumferential direction of the cylindrical portion (10).

28. The injection-molded seal (2) further includes a plurality of axially spaced annular sealing ribs (22) formed on the outer peripheral surface of the body portion (20); 27. The terminal of claim 26, wherein the annular sealing rib (22) is configured to fit snugly against an inner wall surface of the mounting hole in the insulating shell to achieve a seal between the injection-molded seal (2) and the inner wall surface of the mounting hole.

29. 1. An electrical connection assembly comprising: The terminal according to any one of claims 1 to 28, wherein the terminal has a connection portion (14) connected to a rear end of a cylindrical portion (10) of a terminal body (1) of the terminal; a cable crimped or soldered to the connection portion (14) of the terminal; An electrical connection assembly comprising:

30. An electrical connection product, an insulating shell having mounting holes formed therein; A terminal according to any one of claims 1 to 28 or an electrical connection assembly according to claim 29; Equipped with The terminal is inserted into the mounting hole of the insulating shell, and the injection-molded seal (2) seals the mounting hole of the insulating shell to prevent moisture and dust from entering the insulating shell through the mounting hole, in an electrical connection product.

31. 31. The electrical connection product of claim 30, wherein the electrical connection product is a connector, a charging dock, or a charging gun.

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