A connector

Abstract

The present invention discloses a connector, including a shell, a seal, a metal terminal, and a plastic shell. The shell is provided with a wiring hole and an inner cavity of the shell. A plastic shell is installed in the inner cavity of the shell. A terminal fixing cavity is provided in the plastic shell. A metal terminal is fixed in the terminal fixing cavity. Both ends of the plastic shell are assembled and sealed with the seal. The wiring terminal of the wire passes through the wiring hole and the wire insertion hole on the seal and is connected and fixed with the metal terminal. The present invention has good waterproof and insulating effects and is suitable for use in places with moisture and rain. When the connector is installed, the wires can be directly inserted into the product from the wiring holes at both ends to connect, without tightening screws or using crimping pliers to crimp the wires. It is simple, convenient, fast and practical, greatly reducing the difficulty of construction and saving construction time. The present invention has a compact structure and a small size, and is suitable for use in narrow spaces. This solution relies on the elastic card of the internal metal terminal to control the connection quality and improve the installation quality.

Description

Technical Field

[0001] The invention relates to a connector for connecting lines, in particular to a wire connector with quick connection, good insulation and waterproof performance. Background Art

[0002] The wire connectors used in the prior art are of two types: waterproof and non-waterproof. Waterproof connectors generally use screw crimping and terminal crimping inside, and the wire entry part uses threads to press the umbrella-shaped wedge-shaped sealing ring to hold the wire insulation layer tightly, thereby forming a waterproof effect. The disadvantages of this type of connector are: 1. Complex installation: When installing the wire, the product shell needs to be unscrewed, the seals, tightening nuts, etc. need to be put into the wires in advance, the wires and the terminal blocks need to be compressed with screws, or the wire conductors need to be connected by crimping pliers, and then the seals and tightening nuts need to be put back into the connector and tightened with tools such as wrenches. The whole process takes a long time; 2. Large volume. Due to the use of crimping terminals and other structures inside, its size is relatively large, and the size of the external insulation and sealing structure is also increased accordingly, resulting in a large overall volume; 3. It can only be used for wires with a fixed diameter range. For example, a 2.5mm² connector can only connect 2.5mm² wires. If a 1mm² wire is used, it cannot be well sealed; 4. When connecting wire conductors using crimping terminals, people often use non-professional crimping tools such as wire cutters for crimping in order to save trouble. This is greatly affected by human factors and it is difficult to ensure the installation quality. As a result, various accidents such as overheating, failure, and fire of the connectors often occur. Summary of the invention

[0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a connector which has a simple structure, is easy to install, is practical, and has a waterproof function.

[0004] To achieve the above-mentioned purpose, the present invention provides a connector, including a shell, a seal, a metal terminal, and a plastic shell. The shell is provided with a wiring hole and a shell cavity, a plastic shell is installed in the shell cavity, a terminal fixing cavity is provided in the plastic shell, a metal terminal is fixed in the terminal fixing cavity, and both ends of the plastic shell are assembled and sealed with the seal; the wiring terminal of the wire passes through the wiring hole and the wire insertion hole on the seal and is connected and fixed with the metal terminal.

[0005] As a further improvement of the present invention, the metal terminal includes an elastic card, a bottom connecting plate, and a fixed side plate. The fixed side plate is connected and fixed to one end of the elastic card, and the other end of the elastic card gradually deviates in a direction away from the fixed side plate.

[0006] As a further improvement of the present invention, a matching clamping piece is further provided on one end of the elastic card away from the fixed side plate, and the matching clamping piece and the elastic card together form a clamping groove, and the clamping groove is clamped with the wiring terminal;

[0007] There are two elastic cards which are fixed on the fixed side plates at both sides respectively, and a guide groove and a clamping groove are formed between the two elastic cards. The guide groove gradually decreases in width from the fixing point between the elastic card and the fixed side plate to the clamping groove; a blocking plate is arranged on the metal terminal.

[0008] As a further improvement of the present invention, a reinforcing fixing plate is provided on the metal terminal, the reinforcing fixing plate is provided with barbs, and the inner wall of the terminal fixing cavity is provided with a reinforcing fixing groove assembled with the reinforcing fixing plate; the assembly structure of the reinforcing fixing plate and the reinforcing fixing groove has at least one group, that is, it can be two groups or more.

[0009] As a further improvement of the present invention, there are at least two wiring holes, a terminal fixing cavity corresponding to the wiring holes is provided in the plastic shell, an insulating wall is provided between the two terminal fixing cavities, and a metal terminal is fixed in each of the terminal fixing cavities; the wiring holes, wire insertion holes, and terminal fixing cavities are connected in sequence and are the same in number; the insulating wall is made of insulating material.

[0010] As a further improvement of the present invention, there is only one terminal fixing cavity in the plastic shell, the second metal terminal is fixed in the terminal fixing cavity, and the second metal terminal is connected into one piece by two metal terminals through a bottom connecting plate;

[0011] The sealing member is provided with an electric-isolating wall, which divides the inner side of the sealing member into two accommodating cavities, and the accommodating cavities are communicated with the wire insertion hole and the terminal fixing cavity.

[0012] As a further improvement of the present invention, the two ends of the plastic shell are respectively provided with shell sealing ends, and a sealing groove is formed between the shell sealing ends and the inner wall of the inner cavity of the shell;

[0013] The sealing member comprises a sealing ring part and a sealing cylinder part, wherein the sealing cylinder part is inserted into the sealing groove and sealed with the sealing groove; the sealing end face of the shell body is tightly sealed with the inner side face of the sealing ring part; the wire insertion hole is interference fit with the wire and is tightly sealed.

[0014] As a further improvement of the present invention, the wire insertion hole includes a tapered surface from outside to inside, and the tapered surface does not penetrate the entire sealing ring portion of the sealing member.

[0015] As a further improvement of the present invention, the wire insertion hole is provided with a guide tapered hole portion, a straight hole portion, and an end tapered hole portion from left to right, and the guide tapered hole portion, the straight hole portion, and the end tapered hole portion are connected in sequence.

[0016] As a further improvement of the present invention, the wire insertion hole is provided with a first sealing cone hole and a second sealing cone hole from left to right, the first sealing cone hole and the second sealing cone hole are connected in sequence, and the outside of the first sealing cone hole and the second sealing cone hole are a first snap-fitting protrusion and a second snap-fitting protrusion entering the sealing tube part.

[0017] As a further improvement of the present invention, the shell is an integral body, and sealing end faces are respectively provided at both ends of the inner cavity of the shell. The sealing end faces are tightly sealed with the end faces of the sealing member installed in the sealing cavity, and a metal terminal is installed in the sealing cavity.

[0018] The beneficial effects of the present invention are as follows: the present invention has good waterproof and insulating effects and is suitable for use in places with moisture and rain; when the connector is installed, the wires can be directly inserted into the product from the access holes at both ends for connection, without the need to tighten screws or use crimping pliers to crimp the wires, which is simple, convenient, fast and practical, greatly reducing the difficulty of construction and saving construction time.

[0019] The present invention has a compact structure and a small size, and is suitable for use in narrow spaces. The present invention relies on the elastic card of the internal metal terminal to control the connection quality, is not affected by the installation workers, and improves the installation quality (stability). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a specific implementation mode of the connector of the present invention.

[0021] Figure 2 It is an exploded view of parts of a specific implementation mode of the connector of the present invention.

[0022] Figure 3 It is a structural schematic diagram of a specific implementation mode of the connector of the present invention.

[0023] Figure 4 It is a schematic diagram of the metal terminal structure of a specific implementation of the connector of the present invention.

[0024] Figure 5 It is a schematic diagram of the sealing structure of a specific embodiment of the connector of the present invention.

[0025] Figure 6 It is a schematic diagram of the improved structure of the seal of a specific embodiment of the connector of the present invention.

[0026] Figure 7 It is a schematic diagram of the improved structure of the seal of a specific embodiment of the connector of the present invention.

[0027] Figure 8 It is a schematic diagram of the improved structure of the seal of a specific embodiment of the connector of the present invention.

[0028] Fig. 9 It is another structural schematic diagram of a specific implementation mode of the connector of the present invention.

[0029] Fig.10 yes Fig. 9 Schematic diagram of the plastic shell structure.

[0030] Fig.11 It is another structural schematic diagram of a specific implementation mode of the connector of the present invention.

[0031] Fig.12 It is another structural schematic diagram of a specific implementation mode of the connector of the present invention.

[0032] Fig.13 yes Fig.11 Schematic diagram of the second metal terminal structure.

[0033] Fig.14 It is another structural schematic diagram of a specific implementation mode of the connector of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0035] Embodiment 1

[0036] See also Figure 1-Figure 4 A connector includes a shell 100, a seal 300, a metal terminal 400, and a plastic shell 500. The shell 100 is provided with a wiring hole 101 and a shell cavity 102. The shell cavity 102 is provided with a plastic shell 500. The plastic shell 500 is provided with a terminal fixing cavity 501. The metal terminal 400 is fixed in the terminal fixing cavity 501. Both ends of the plastic shell 500 are assembled and sealed with the seal 300.

[0037] The connection terminal 210 of the wire 200 passes through the connection hole 101 and the wire insertion hole 301 on the sealing member 300 and is connected and fixed to the metal terminal 400 .

[0038] See also Figure 4The metal terminal 400 includes an elastic card 410, a bottom connecting plate 440, and a fixed side plate 460. The fixed side plate 460 is connected and fixed to one end of the elastic card 410. The other end of the elastic card 410 gradually deviates in a direction away from the fixed side plate 460, and a matching clamping piece 411 is also provided on this end. The matching clamping piece 411 and the elastic card 410 together form a clamping groove, and the clamping groove is clamped with the terminal 210;

[0039] There are two elastic cards 410, which are fixed to the fixed side plates 460 on both sides, and a guide groove 431 and a clamping groove 432 are formed between the two elastic cards 410. The width of the guide groove 431 gradually decreases from the fixing point of the elastic card 410 and the fixed side plate 460 to the clamping groove 432. When the terminal 210 is inserted into the guide groove 431, the terminal 210 can easily enter the clamping groove 432 through the guiding effect of the guide groove 431 and be clamped by the clamping groove 432.

[0040] Furthermore, in order to prevent the wiring terminal 210 from excessively extending into the metal terminal 400 and thus hindering the wiring work, a blocking plate 420 may be provided on the metal terminal 400 .

[0041] Furthermore, in order to prevent the metal terminal 400 from sliding in the terminal fixing cavity 501 or even sliding out of the terminal fixing cavity 501, a reinforcing fixing sheet 450 can be provided on the metal terminal 400, and the reinforcing fixing sheet 450 is provided with a barb 451, and the inner wall of the terminal fixing cavity 501 is provided with a reinforcing fixing groove assembled with the reinforcing fixing sheet 450, and the tip of the barb 451 is inclined toward the opening direction of the terminal fixing cavity 501 close to it. This design enables the reinforcing fixing sheet 450, the barb 451 to engage with the reinforcing fixing groove, thereby preventing the metal terminal from falling off from the terminal fixing cavity 501.

[0042] Furthermore, a shell sealing end 510 is respectively provided at both ends of the plastic shell 500, and a sealing groove 103 is formed between the shell sealing end 510 and the inner wall of the shell inner cavity 102;

[0043] The sealing member 300 includes a sealing ring portion 303 and a sealing sleeve portion 302. The sealing sleeve portion 302 is inserted into the sealing groove 103 and sealed with the sealing groove 103. The end surface of the housing sealing end 510 is tightly sealed with the inner side surface of the sealing ring portion 303.

[0044] The wire insertion hole 301 is clamped and sealed with the wire 200 .

[0045] This design can make the entire housing inner cavity 102 in a sealed state, thereby achieving a waterproof effect.

[0046] When in use, the two wires 200 to be connected are respectively inserted into the wiring holes at both ends of the connector and the wiring terminals 210 are respectively clamped with the locking grooves 432. Since the metal terminal 400 is made of conductive material and the two wires are respectively connected to the metal terminals for conductivity, the effect of connecting the two wires for conductivity is achieved.

[0047] Compared with the connector in the prior art, this structure is simpler in structure, smaller in size, and has good sealing performance. When in use, it is only necessary to insert the connection ends of the two wires into the clamping slots respectively and clamp them by the elastic force of the elastic card, which is very convenient and quick to use.

[0048] See also Figure 5-Figure 8 , the structures shown are various improved structures of the sealing member, and the wire insertion holes 301 described above are all interference fit with the wire 200 to achieve a sealing effect. The puncture opening 3017 can be solid before the wire is inserted, and is punctured at the weakest position when the wire is inserted, forming a puncture opening. The puncture opening can also be a pre-made through hole with a smaller diameter.

[0049] Figure 5-Figure 8 The various seal structures shown are different in the shape of the wire insertion hole 301.

[0050] See also Figure 5 The wire insertion hole 301 is a straight hole. When in use, the wire 200 directly passes through the wire insertion hole 301 and is interference fit with the wire insertion hole 301. Although this structure is simple, it has a fixed requirement for the wire diameter, that is, only wires with fixed diameters can be used, otherwise it will cause poor sealing or no sealing.

[0051] See also Figure 6 The wire insertion hole 301 includes a tapered surface 3011 from outside to inside and a puncture hole 3017. The tapered surface 3011 does not penetrate the entire sealing ring portion of the sealing member 300 and is connected to the puncture hole 3017. The puncture hole 3017 allows the wire insertion hole 301 to adapt to wires of any diameter, thereby increasing its application range. When in use, the wire can directly pass through the puncture hole 3017.

[0052] See also Figure 7The wire insertion hole 301 is provided with a guide cone hole portion 3012, a straight hole portion 3013, an end cone hole portion 3014, and a puncture hole 3017 from left to right, and the guide cone hole portion 3012, the straight hole portion 3013, the end cone hole portion 3014, and the puncture hole 3017 are connected in sequence. When in use, the guide cone hole portion 3012 is used to facilitate the insertion of the wire into the straight hole portion 3013; the straight hole portion can achieve a sealing effect with a wire having a diameter larger than that of the straight hole portion through interference fit; the end cone hole portion 3014 is used to guide the wire so that the wire can enter the puncture hole 3017 more easily. This structure can increase the sealing effect of the wire insertion hole on the wire.

[0053] See also Figure 8 The wire insertion hole 301 is provided with a first sealing cone hole 3015, a second sealing cone hole 3016, and a puncture hole 3017 from left to right, and the first sealing cone hole 3015, the second sealing cone hole 3016, and the puncture hole 3017 are connected in sequence, and the outside of the first sealing cone hole 3015, the second sealing cone hole 3016, and the puncture hole 3017 are the first engaging protrusion 310 and the second engaging protrusion 320 that enter the sealing tube part 302.

[0054] When in use, the first sealing cone hole 3015 and the second sealing cone hole 3016 can guide the wire, making it easy for the wire to penetrate into the puncture hole 3017, and when the wire diameter is large, the wire can also be clamped and sealed with the first sealing cone hole 3015 or the second sealing cone hole 3016, thereby increasing the sealing effect of the seal on the wire. The design of the first clamping protrusion 310 and the second clamping protrusion 320 can provide them with a large expansion space (expanded by their own elasticity), thereby preventing the wire from being unable to be inserted into the puncture hole when it is too thick, or even causing the puncture hole to tear.

[0055] The sealing element is made of elastic material, such as rubber, silicone and the like.

[0056] Embodiment 2

[0057] See also Figure 9-10 The structure shown is a structure with two metal terminals, which is different from the first embodiment as follows:

[0058] There are two wiring holes 101, and two terminal fixing cavities 501 corresponding to the wiring holes 101 are provided in the plastic shell 500, and an insulating wall 580 is provided between the two terminal fixing cavities 501, and a metal terminal is fixed in each of the terminal fixing cavities 501; there are also two wire insertion holes 301;

[0059] The wiring hole 101, the wire insertion hole 301, and the terminal fixing cavity 501 are connected in sequence and have the same number;

[0060] The insulating wall 580 is made of insulating material. Of course, the plastic shell can be made of insulating material and integrally cast.

[0061] The plastic shell 500 is not provided with a shell sealing end 510 , and the end surface of the sealing member is directly in close contact with the two ends of the plastic shell 500 for sealing.

[0062] This structure is mainly used for connecting multiple wires at the same time, such as connecting the live wire and the neutral wire at the same time. It can connect two or more wires with only one connector, thus making the layout and connection of the wires more reasonable.

[0063] Embodiment 3

[0064] See also Figure 11-13 , which differs from the second embodiment as follows:

[0065] There is only one terminal fixing cavity 501 in the plastic shell 500, and the second metal terminal 490 is fixed in the terminal fixing cavity 501. The second metal terminal 490 is connected into one body by two metal terminals 400 through a bottom connecting plate 440;

[0066] The sealing member 300 is provided with an electric-isolating wall 330 , and the electric-isolating wall 330 divides the inner side of the sealing member 300 into two accommodating chambers 340 . The accommodating chambers 340 are communicated with the wire insertion hole 301 and the terminal fixing chamber 501 .

[0067] This design is mainly used for multiple connections of the same line, such as connecting a live wire and connecting several other wires through a secondary connector to make them also live wires to connect to other devices.

[0068] Embodiment 4

[0069] See also Fig.14 The housing 100 is a whole, and the two ends of the housing inner cavity 102 are respectively provided with sealing end faces 106, and the sealing end faces 106 are tightly sealed with the end faces of the sealing member 300 installed in the sealing cavity 105, and the metal terminal 400 is installed in the sealing cavity. This structure has higher sealing performance and simpler structure.

[0070] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A connector, comprising: The shell, the seal, the metal terminal, and the plastic shell are characterized in that: the shell is provided with a wiring hole and a shell cavity, the shell cavity is provided with a plastic shell, the plastic shell is provided with a terminal fixing cavity, the terminal fixing cavity is provided with a metal terminal, both ends of the metal terminal can be connected to the wire, and the two ends of the plastic shell are assembled and sealed with the seal; the wire terminal passes through the wiring hole and the wire insertion hole on the seal and is connected and fixed to the metal terminal; The wire insertion hole is provided with a first sealing cone hole, a second sealing cone hole, and a puncture hole from left to right in sequence, the first sealing cone hole, the second sealing cone hole, and the puncture hole are connected in sequence, and the first sealing cone hole and the second sealing cone hole are provided with a first engaging protrusion and a second engaging protrusion entering into the sealing cylinder part outside; The metal terminal comprises an elastic card, a bottom connecting plate, and a fixed side plate, wherein the fixed side plate is connected and fixed to one end of the elastic card, and the other end of the elastic card gradually deviates in a direction away from the fixed side plate; A matching clamping piece is also provided on one end of the elastic card away from the fixed side plate, and the matching clamping piece and the elastic card together form a clamping groove, and the clamping groove is clamped with the wiring terminal; There are two elastic cards, which are respectively fixed on the fixed side plates at both sides, and a guide groove and a clamping groove are formed between the two elastic cards. The guide groove gradually decreases in width from the fixing point between the elastic card and the fixed side plate to the clamping groove. A blocking plate is provided on the metal terminal; A reinforcing fixing sheet is arranged on the metal terminal, the reinforcing fixing sheet is provided with barbs, and the inner wall of the terminal fixing cavity is provided with a reinforcing fixing groove assembled with the reinforcing fixing sheet; the reinforcing fixing sheet and the reinforcing fixing groove have at least one assembly structure; There is only one terminal fixing cavity in the plastic shell, and the terminal is fixed in the terminal fixing cavity. The terminal is connected into one piece by two metal terminals through a bottom connecting plate; The sealing member is provided with an electric-insulating wall, and the electric-insulating wall divides the inner side of the sealing member into two accommodating cavities, and the accommodating cavities are connected with the wire insertion hole and the terminal fixing cavity; The two ends of the plastic shell are respectively provided with shell sealing ends, and a sealing groove is formed between the shell sealing end and the inner wall of the shell inner cavity; The sealing member comprises a sealing ring part and a sealing cylinder part, wherein the sealing cylinder part is inserted into the sealing groove and sealed with the sealing groove; the sealing end surface of the housing is tightly sealed with the inner side surface of the sealing ring part; the wire insertion hole is interference-fitted with the wire and tightly sealed; The shell is a whole, and sealing end faces are respectively arranged at both ends of the inner cavity of the shell. The sealing end faces are tightly sealed with the end faces of the sealing member installed in the sealing cavity, and a metal terminal is installed in the sealing cavity.

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