Improved multi-core electric connector

Abstract

The invention discloses an improved multi-core electric connector, which comprises a wire end terminal seat, a plate end terminal seat, a wire protection shell, a plurality of wire end terminals arranged in the wire end terminal seat and a plurality of plate end terminals arranged in the plate end terminal seat, and is characterized in that the wire end terminal seat, the plate end terminal seat and the wire protection shell are coaxially arranged; the wire end terminal base is installed in the wire protection shell, the plate end terminal base is clamped at one end of the wire protection shell, the plate end terminals correspond to the wire end terminals one to one, and when the plate end terminal base is clamped with the wire protection shell, the plate end terminals can be connected with the corresponding wire end terminals in an inserted mode. The wire end terminal seat comprises a main body and first clamping jaws arranged on the main body, clamping through holes are formed in the positions, corresponding to the first clamping jaws, of the side wall of the wire protection shell respectively, and the first clamping jaws are connected with the corresponding clamping through holes in a clamped mode. The improved multi-core electric connector is small in size, convenient to install and firm in clamping.

Description

[0001] This application is a divisional application of the patent application with the invention name of "An improved multi-core electrical connector", the application date of March 31, 2021, and the application number of 202110350819.0. Technical Field

[0002] The present invention relates to the technical field of electrical connectors, and particularly to an improved multi-core electrical connector. Background Art

[0003] Electrical connectors generally refer to connection components and their accessory parts applied to electronic signals and power supplies. They are the bridges for all signals. Their quality will affect the reliability of current signal transmission and is closely related to the operation of various electronic systems and electrical equipment. Electrical connectors can be divided into the "plug" at the male end and the "socket" at the female end. In order to ensure stable transmission after the plug is inserted into the socket and not easily loosen due to external forces such as vibration and shaking, manufacturers will design the configurations of the plug and the socket to match each other to ensure the connection strength between the plug and the socket during insertion. However, the traditional electrical connector has a complex structure, the insertion between the plug and the socket is not convenient enough, and the production cost is relatively high. Moreover, for some traditional electrical connectors, there is no anti-fooling design between the plug and the socket, and there is a situation of reverse insertion during the insertion process of the plug and the socket, which may lead to connection failure. In severe cases, it may even cause damage to the connector or the circuit.

[0004] Generally, male terminals are installed in the plug. For traditional electrical connectors, the design of their male terminals is not reasonable enough, the structure is relatively complex, the manufacturing cost is relatively high, and the installation is not convenient enough. It is not easy to replace when damaged. At the same time, due to the influence of the structure design, traditional electrical connectors often cannot be made very small in size. When installed on devices such as chassis, they will occupy more space, and the space utilization rate is not high, which is not conducive to the miniaturization design of the device. In addition, when the electrical connector is not in use, the board end and the wire end need to be separated. There are board end terminals inside the board end. However, traditional electrical connectors do not have a sealing cover structure designed. In the case of not being used for a long time, dust is likely to accumulate inside the board end, and there will be a phenomenon of poor contact when used again.

[0005] Therefore, in combination with the above existing technical problems, it is necessary to propose a new technical solution. Summary of the Invention

[0006] The purpose of the present invention is to provide an electrical connector with a small volume, convenient installation, and reliable clamping.

[0007] To achieve the invention purpose, the present invention provides an improved multi-core electrical connector, which includes a wire-end terminal seat, a board-end terminal seat, a wire protection housing, a plurality of wire-end terminals installed in the wire-end terminal seat, and a plurality of board-end terminals installed in the board-end terminal seat. The wire-end terminal seat, the board-end terminal seat, and the wire protection housing are coaxially arranged. The wire-end terminal seat is installed in the wire protection housing, the board-end terminal seat is clamped at one end of the wire protection housing, the board-end terminals correspond to the wire-end terminals one by one, and when the board-end terminal seat is clamped with the wire protection housing, the board-end terminals can be inserted into the corresponding wire-end terminals.

[0008] Further, the wire-end terminal seat includes a main body and a first claw provided on the main body. The main body has a plug end and a wiring end along its axial direction. The plug end of the main body extends outward along its axial direction with a limiting structure. One end of the first claw is connected to the plug end of the main body. The length direction of the first claw is consistent with the axial direction of the main body. The first claws are symmetrically arranged on both sides of the limiting structure in the width direction. The wire-end terminal seat is clamped with the side wall of the wire protection housing through the first claws, and the limiting structure faces the board-end terminal seat.

[0009] Further, the wire protection housing has a clamping end and a wire-passing end along its axial direction. The wire-end terminal seat is installed near the clamping end. There is a foolproof design between the wire-end terminal seat and the wire protection housing. Clamping through holes are respectively opened on the side wall of the wire protection housing at positions corresponding to the first claws, and the first claws are clamped with the corresponding clamping through holes.

[0010] Further, a first pressing structure and a first convex are provided on the side of the first claw away from the limiting structure. The first convexes are symmetrically arranged on both sides of the first pressing structure in the length direction of the main body. One side of the clamping through hole penetrates the end face of the clamping end. Second convexes are respectively provided on the two inner walls of the clamping through hole in the length direction of the main body. When the first claw is clamped with the corresponding clamping through hole, the first pressing structure is located between the two second convexes, the first convex is clamped with the second convex, and the upper surface of the first pressing structure is not higher than the outer wall surface of the wire protection housing.

[0011] Further, second claws are respectively arranged on both sides of the wire protection housing in its length direction. The length direction of the second claws is consistent with the axial direction of the wire protection housing. One end of the second claw is connected to the outer wall surface of the wire protection housing. The other end of the second claw is a free end, and the free end faces the wire-passing end. A third convex is provided on the outer side of the second claw, and a second pressing structure is provided at the free end.

[0012] Further, the board-end terminal block includes a board-end body. One end face of the board-end body extends outward along its axis direction to form a ring-shaped protrusion. Clamping ears are provided on both sides of the ring-shaped protrusion. A plurality of first accommodation cavities are arranged in the board-end body. The first accommodation cavities respectively penetrate through the wiring-end face and the clamping-end face of the body. The areas enclosed by the first accommodation cavities are communicated with each other. The board-end terminals are installed in the first accommodation cavities. The insertion ends of the board-end terminals extend into the area enclosed by the ring-shaped protrusion. When the board-end terminal block is clamped to one end of the wire protection housing, the clamping end of the wire protection housing is inserted into the area enclosed by the ring-shaped protrusion. The clamping ears on both sides of the ring-shaped protrusion are respectively clamped with the corresponding second claws. The board-end terminals are inserted and connected with the corresponding wire-end terminals.

[0013] Further, an anti-fooling structure is arranged in the area enclosed by the ring-shaped protrusion. When the board-end terminal block is clamped to one end of the wire protection housing, the anti-fooling structure is inserted between the limit structure and the wire protection housing. An anti-fooling design is provided between the anti-fooling structure and the limit structure.

[0014] Further, the wire-end terminal block further includes a rear cover. A plurality of second accommodation cavities are arranged in the main body. The axis direction of the second accommodation cavities is the same as the axis direction of the main body. A plurality of insertion holes are formed in the extending end of the limit structure. The insertion holes correspond to the second accommodation cavities one by one. The insertion holes are communicated with the corresponding second accommodation cavities. The wire-end terminals are installed in the second accommodation cavities. The rear cover is clamped to the wire-passing end of the main body. When the board-end terminal block is clamped to one end of the wire protection housing, one end of the board-end terminal is inserted and connected with the corresponding wire-end terminal through the insertion hole.

[0015] Further, the wire-end terminal includes a terminal body and a spring piece. The terminal body sequentially includes a wiring part and an insertion part along its length direction. The insertion part faces the insertion hole. The wiring part includes a connecting part, a supporting part and a fixing part which are connected in sequence. The length direction of the connecting part is the same as the length direction of the wire-end terminal. The fixing part is arranged opposite to the connecting part. One end of the spring piece is connected with the fixing part. The other end of the spring piece is a free end. The free end extends and bends towards the side away from the insertion part. The free end abuts against one side of the connecting part. The insertion part includes a first insertion part and a second insertion part. The length directions of both the first insertion part and the second insertion part are the same as the length direction of the connecting part. One end of the first insertion part is connected with the connecting part. One end of the second insertion part is connected with the supporting part. The first insertion part and the second insertion part are arranged opposite to each other. The other ends of the first insertion part and the second insertion part respectively extend towards the direction away from the spring piece.

[0016] Further, a key through-hole and a wire threading counterbore are respectively provided at the position of the rear cover corresponding to each of the second accommodating cavities. The key through-hole is located on one side of the wire threading counterbore in the width direction of the rear cover. A wire threading hole is provided in the wire threading counterbore, and the wire threading hole penetrates through the rear cover. A key is installed in the key through-hole, and one end of the key abuts against the elastic piece. Pressing the key can make the free end of the elastic piece move away from the connecting portion.

[0017] Further, a plurality of clamping holes are respectively provided on two side walls of the main body in the width direction, and the clamping holes are close to the wire threading end.

[0018] Further, the clamping holes correspond one-to-one to the accommodating cavities located on the outermost sides in the width direction of the main body, and the clamping holes communicate with the corresponding accommodating cavities. A plurality of second clamping protrusions are respectively provided at both ends of the rear cover in the width direction. When the rear cover is clamped to the wiring end of the main body, the second clamping protrusions correspond one-to-one to the clamping holes, and the second clamping protrusions are clamped with the corresponding clamping holes.

[0019] The improved multi-core electrical connector of the present application has one or more of the following beneficial effects:

[0020] (1) The improved multi-core electrical connector of the present application has a compact structure, a small volume, is convenient to install, and has a firm clamping;

[0021] (2) For the improved multi-core electrical connector of the present application, a ring-shaped protrusion extends from one side of the board-end terminal seat. When it is clamped with the wire-end, one end of the wire-end protective wire housing can be inserted into it. On the one hand, it can hide the clamping claws of the wire-end terminal inside the protective wire housing to prevent accidental touch from causing the unlocking of the protective wire housing. On the other hand, it can also cooperate with the sealing cover to play a sealing role;

[0022] (3) For the improved multi-core electrical connector of the present application, an anti-fooling structure is provided inside the ring-shaped protrusion of the board-end terminal seat. When it is clamped with the wire-end, it can cooperate with the wire-end terminal seat to play an anti-fooling role and ensure that the wire-end of the electrical connector will not be inserted reversely;

[0023] (4) For the improved multi-core electrical connector of the present application, clamping ears are provided on both sides of the board-end terminal seat. On the one hand, it can cooperate with the clamping claws on the protective wire housing to achieve quick disassembly and assembly. On the other hand, it can also be used to install the sealing cover to seal the area inside the ring-shaped protrusion of the board-end terminal seat;

[0024] (5) For the improved multi-core electrical connector of the present application, the wire-end terminal seat has a compact structure and a small volume, and can be installed inside the protective wire housing, which helps to miniaturize the electrical connector;

[0025] (6) The improved multi-core electrical connector of the present application has a limiting structure extending from one side of its wire-end terminal seat. An anti-fooling design is carried out between the limiting structure and the wire protection housing and the wire-end terminal seat respectively, which can prevent the reverse insertion of the wire end of the electrical connector;

[0026] (7) The improved multi-core electrical connector of the present application has a push-button design along its axis for the wire-end terminal seat, so that more rows of accommodation cavities can be designed according to needs to install wire-end terminals, with high space utilization rate and a large number of wire-end terminals installed;

[0027] (8) When the wire-end terminal seat of the improved multi-core electrical connector of the present application is snap-fitted with the wire protection housing, the first pressing structure on the claw is embedded in the inner wall of the wire protection housing, which can ensure that one end of the wire protection housing can be smoothly connected to the board end of the electrical connector, and at the same time, the claw is well hidden to avoid accidental touch and unlocking of the wire protection housing;

[0028] (9) The wire-end terminals of the improved multi-core electrical connector of the present application are of a split type, and the terminal body is integrally formed, which can be stamped from a metal plate with a set shape, with simple structure and low production cost, and different materials of elastic pieces can be selected according to needs, ensuring excellent elasticity of the elastic pieces while being simple to install and convenient for assembling the electrical connector;

[0029] (10) The wire-end terminals of the improved multi-core electrical connector of the present application are provided with a baffle portion, which plays a limiting role and can prevent the board-end terminal from being inserted too deeply when the board-end terminal is inserted into the wire-end terminal;

[0030] (11) One end of the support portion of the wire-end terminal of the improved multi-core electrical connector of the present application, which is far from the insertion portion, is provided with a key limiting notch, which can play a role in limiting the key and prevent the key from being pressed too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the multi-core electrical connector provided in this embodiment;

[0032] Figure 2 is an exploded structural diagram of the multi-core electrical connector provided in this embodiment;

[0033] Figure 3 is an exploded structural diagram of the wire-end terminal seat provided in this embodiment;

[0034] Figure 4 is a three-dimensional structural diagram of the wire-end terminal seat body in one direction provided in this embodiment;

[0035] Figure 5 is a three-dimensional structural diagram of the wire-end terminal seat body in the second direction provided in this embodiment;

[0036] Figure 6 Schematic structural diagram of the wire-end terminal block body provided in this embodiment in the side view direction;

[0037] Figure 7 Schematic structural diagram of the back cover of the wire-end terminal block provided in this embodiment;

[0038] Figure 8 Schematic structural diagram of the wire-end terminal block provided in this embodiment in the top view direction;

[0039] Figure 9 is Figure 8 Cross-sectional view at A;

[0040] Figure 10 Schematic diagram of the installation positions among the wire-end terminal, button, and back cover when removing the wire-end terminal block body provided in this embodiment;

[0041] Figure 11 Schematic diagram of the installation position between the wire-end terminal block and the wire protection housing provided in this embodiment;

[0042] Figure 12 Stereoscopic structural diagram of the wire protection housing provided in this embodiment;

[0043] Figure 13 Schematic structural diagram of the wire protection housing provided in this embodiment in the top view direction;

[0044] Figure 14 Stereoscopic structural diagram of the wire-end terminal provided in this embodiment;

[0045] Figure 15 Stereoscopic structural diagram of the board-end terminal block provided in this embodiment;

[0046] Figure 16 Schematic structural diagram of the board-end terminal block when the board-end terminal is installed provided in this embodiment;

[0047] Figure 17 Schematic structural diagram of the board-end terminal block in the axial direction provided in this embodiment;

[0048] Figure 18 Stereoscopic structural diagram of another board-end terminal block provided in this embodiment;

[0049] Figure 19 Schematic structural diagram of the board-end terminal block when the sealing cover is installed provided in this embodiment.

[0050] Among them, 1 - wire - end terminal block, 11 - main body, 111 - limiting structure, 1111 - first anti - fooling rib, 112 - second accommodating cavity, 113 - insertion hole, 114 - second anti - fooling rib, 115 - clamping hole, 12 - first clamping claw, 121 - first pressing structure, 122 - first clamping protrusion, 13 - rear cover, 131 - button through - hole, 1311 - groove, 132 - wire - threading counterbore, 1321 - wire - threading hole, 133 - second clamping protrusion, 134 - first limiting protrusion, 135 - second limiting protrusion, 2 - board - end terminal block, 21 - board - end body, 211 - first accommodating cavity, 212 - threaded structure, 213 - nut, 214 - fixing plate structure, 22 - annular protrusion, 23 - clamping ear, 231 - groove, 232 - clamping hole, 24 - anti - fooling structure, 241 - first anti - fooling groove, 242 - clamping claw groove, 25 - sealing cover, 251 - cover plate structure, 252 - handle structure, 253 - clamping protrusion, 3 - wire - protecting housing, 31 - clamping through - hole, 32 - second clamping protrusion, 33 - second clamping claw, 331 - third clamping protrusion, 332 - second pressing structure, 34 - second anti - fooling groove, 4 - wire - end terminal, 41 - terminal body, 411 - wiring part, 4111 - connecting part, 4112 - supporting part, 41121 - baffle part, 41122 - button limiting notch, 4113 - first fixing part, 4114 - second fixing part, 4115 - third fixing part, 412 - inserting part, 4121 - first inserting part, 41211 - first intermediate transition section, 41212 - first inserting section, 4122 - second inserting part, 41221 - connecting section, 41222 - second intermediate transition section, 41223 - second inserting section, 413 - wire - clamping protrusion, 414 - strip - shaped groove, 42 - elastic piece, 421 - first connecting section, 422 - second connecting section, 423 - intermediate elastic section, 424 - wire - pressing section, 5 - board - end terminal, 6 - button, 7 - snap - ring structure, 8 - cable sealing ring, 9 - tail nut. Detailed implementation manners

[0051] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0052] Embodiment

[0053] This embodiment discloses an improved multi - core electrical connector, which includes a coaxially arranged wire - end terminal block 1, a board - end terminal block 2 and a wire - protecting housing 3, as Figure 1 and Figure 2As shown in the figure. A number of wire-end terminals 4 are installed in the wire-end terminal block 1, and a number of board-end terminals 5 are installed in the board-end terminal block 2. In this embodiment, an 18-core electrical connector is taken as an example to elaborate the solution, that is, 18 terminals are provided in both the wire-end terminal block 1 and the board-end terminal block 2. The wire-end terminal block 1 is installed in the wire protection housing 3. The board-end terminal block 2 is snap-fitted to one end of the wire protection housing 3. The board-end terminals 5 correspond to the wire-end terminals 4 one by one. When the board-end terminal block 2 is snap-fitted to the wire protection housing 3, the board-end terminals 5 can be inserted into the corresponding wire-end terminals 4.

[0054] As Figure 3 shown, the wire-end terminal block 1 includes a main body 11 and a rear cover 13. As Figures 4 to 6 shown, the main body 11 has a plug end and a wire-passing end along its axial direction. The plug end of the main body 11 extends outward along its axial direction with a limiting structure 111. A number of second accommodation cavities 112 are provided in the main body 11, and the axial direction of the second accommodation cavities 112 is the same as the axial direction of the main body 11. One end of the second accommodation cavity 112 facing the wire-passing end is communicated with the outside of the main body 11. A number of plug holes 113 are provided at the extending end of the limiting structure 111, and the plug holes 113 correspond to the second accommodation cavities 112 one by one, and the plug holes 113 are communicated with the corresponding second accommodation cavities 112. A first claw 12 is provided on the main body 11, and the clamping end of the first claw 12 faces the plug end. The rear cover 13 is snap-fitted to the wire-passing end of the main body 11, as Figure 8 shown.

[0055] As Figure 5 shown, the length direction of the limiting structure 111 is the same as the length direction of the main body 11. The two ends of the limiting structure 111 in the length direction are aligned with the two ends of the main body 11 in the length direction. A number of the plug holes 113 are divided into multiple rows along the width direction of the limiting structure 111, and multiple plug holes 113 in each row are arranged at intervals along the length direction of the limiting structure 111. In this embodiment, an 18-core electrical connector is taken as an example to elaborate the solution. Therefore Figure 5 as shown in the figure, a total of two rows are provided on the main body 11 of the wire-end terminal block 1, and 9 plug holes 113 are provided in each row respectively. Of course, in specific implementation, other multiple rows can also be provided on the main body 11 of the wire-end terminal block 1, and each row can also include other multiple plug holes 113. For example, for a 30-core electrical connector, three rows can be provided, and 10 plug holes 113 can be provided in each row, etc. Correspondingly, the second accommodation cavities 112 are arranged in the main body 11 according to the same rule as the plug holes 113.

[0056] A number of first anti-fooling ribs 1111 are respectively provided on both sides of the limiting structure 111 in the width direction, asFigure 3 or Figure 5 As shown. The length direction of the first fool-proof rib 1111 is consistent with the axial direction of the main body 11. The multiple first fool-proof ribs 1111 located on the same side are spaced along the length direction of the limiting structure 111, and the number of first fool-proof ribs 1111 located on both sides of the limiting structure 111 is different, which can play a fool-proof role. Of course, the first fool-proof rib 1111 can also play a fool-proof role by different intervals, different sizes, or different shapes.

[0057] like Figure 6 As shown, one end of the first claw 12 is connected to the plug-in end of the main body 11, the length direction of the first claw 12 is consistent with the axial direction of the main body 11, and the first claw 12 is symmetrically arranged on both sides of the limiting structure 111 in the width direction. The first claw 12 is provided with a first pressing structure 121 and a first clamping protrusion 122 on one side away from the limiting structure 111, and the first clamping protrusion 122 is symmetrically arranged on both sides of the first pressing structure 121 in the length direction of the main body 11. The first pressing structure 121 is preferably a long strip protrusion, and its length direction is consistent with the length direction of the main body 11. The upper surface of the first pressing structure 121 is provided with an anti-slip structure. The anti-slip structure is preferably a long strip groove, and the length direction of the long strip groove is consistent with the length direction of the first pressing structure 121. Of course, the anti-slip structure can also be other shapes and other arrangements. In order to prevent the first clamping claw 12 from being deformed due to uneven cooling caused by the first pressing structure 121 being too thick during the manufacturing process, the first pressing structure 121 can adopt a stealing material design, that is, the first pressing structure 121 is designed to be hollow. The first clamping protrusion 122 is designed with a slope on the side facing the main body 11, and the end of the slope away from the first clamping claw 12 is inclined in the direction away from the main body 11. This structural design can ensure that the first clamping protrusion 122 can be smoothly engaged with the wire protection housing 3. The first clamping protrusion 122 is designed with a slope on the side facing away from the main body 11, that is, the engaging surface of the first clamping protrusion 122 is designed with a slope, and the end of the engaging surface of the first clamping protrusion 122 away from the first clamping claw 12 is inclined in the direction away from the main body 11. This structural design can ensure the reliability of the engagement of the first clamping protrusion 122.

[0058] like Figure 5As shown, on both sides of the main body 11 in its length direction, a plurality of second anti-fooling ribs 114 are respectively provided. The length direction of the second anti-fooling ribs 114 is consistent with the axial direction of the main body 11, and a plurality of second anti-fooling ribs 114 on the same side are spaced apart along the width direction of the main body 11. Preferably, two second anti-fooling ribs 114 are respectively provided on both sides of the main body 11 in its length direction, and the intervals between the second anti-fooling ribs 114 on both sides of the main body 11 are different, which can play an anti-fooling role. Of course, the second anti-fooling ribs 114 can also play an anti-fooling role by different numbers, or different sizes, or different shapes, etc.

[0059] As Figure 4 or Figure 5 As shown, on the two side walls of the main body 11 in the width direction, a plurality of card holes 115 are respectively opened, and the card holes 115 are close to the wire threading end. The card holes 115 correspond one-to-one with the accommodation cavities located on the outermost sides of the main body 11 in the width direction, and the card holes 115 communicate with the corresponding accommodation cavities. A plurality of second card protrusions 133 are respectively provided at both ends of the rear cover 13 in the width direction. When the rear cover 13 is snapped onto the wire threading end of the main body 11, the second card protrusions 133 correspond one-to-one with the card holes 115, and the second card protrusions 133 are snap-connected with the corresponding card holes 115.

[0060] As Figure 3 and Figure 9 As shown, at the position corresponding to each of the second accommodation cavities 112, the rear cover 13 is respectively provided with a key through hole 131 and a wire threading sink hole 132. The key through hole 131 is located on one side of the wire threading sink hole 132 in the width direction of the rear cover 13. A wire threading hole 1321 is opened in the wire threading sink hole 132, and the wire threading hole 1321 penetrates through the rear cover 13. On the opposite surface of the rear cover 13 and the main body 11, at the position corresponding to each wire threading sink hole 132, a first limiting protrusion 134 is provided, and the wire threading hole 1321 penetrates through the first limiting protrusion 134, as Figure 7 shown. On the side surface of the rear cover 13 away from the main body 11, second limiting protrusions 135 are respectively provided on both sides of the key through hole 131 in the length direction of the rear cover 13. The length direction of the second limiting protrusions 135 is consistent with the width direction of the rear cover 13. One side of the second limiting protrusions 135 is aligned with the inner wall of the key through hole 131. Grooves 1311 are respectively opened on the inner walls of both sides of the key through hole 131 in the length direction of the rear cover 13. The length direction of the grooves 1311 is consistent with the axial direction of the key through hole 131, and one end of the grooves 1311 extends to one side of the second limiting protrusions 135 and penetrates through the end of the second limiting protrusions 135.

[0061] AsFigure 11 As shown, the wire-end terminal block 1 is snap-connected to the side wall of the wire protection housing 3 through the first clamping claws 12, and the limiting structure 111 faces the board-end terminal block 2. The wire protection housing 3 has a clamping end and a wire-passing end along its axial direction. The wire-end terminal block 1 is installed at a position close to the clamping end. Clamping through holes 31 are respectively formed in the side wall of the wire protection housing 3 at positions corresponding to the first clamping claws 12, and the first clamping claws 12 are snap-connected to the corresponding clamping through holes 31. As Figure 12 and Figure 13 shown, one side of the clamping through hole 31 penetrates through the end face of the clamping end, and second clamping protrusions 32 are respectively provided on two inner walls of the clamping through hole 31 in the length direction of the main body 11. When the first clamping claw 12 is snap-connected to the corresponding clamping through hole 31, the first pressing structure 121 is located between the two second clamping protrusions 32, the first clamping protrusion 122 is snap-connected to the second clamping protrusion 32, and the upper surface of the first pressing structure 121 is not higher than the outer wall surface of the wire protection housing 3. Second clamping claws 33 are respectively arranged on both sides of the wire protection housing 3 in its length direction, and the length direction of the second clamping claws 33 is consistent with the axial direction of the wire protection housing 3. One end of the second clamping claw 33 is connected to the outer wall surface of the wire protection housing 3, the other end of the second clamping claw 33 is a free end, and the free end faces the wire-passing end. A third clamping protrusion 331 is arranged on the outer side of the second clamping claw 33, and a second pressing structure 332 is arranged at the free end. A second anti-fooling groove 34 is formed in the inner wall of the wire protection housing 3. When the wire-end terminal block 1 is installed in the wire protection housing 3, the second anti-fooling ribs 114 on both sides of the main body 11 of the wire-end terminal block 1 are inserted and matched with the second anti-fooling groove 34 to play an anti-fooling role and prevent the wire-end terminal block 1 from being installed in the wrong direction. A threaded structure is arranged at the wire-passing end of the wire protection housing 3, and a toothed structure is arranged at its end position. A snap ring structure 7 is arranged at the wire-passing end of the wire protection housing 3, and the toothed structure on the snap ring structure 7 is engaged with the toothed structure at one end of the wire protection housing 3. The cable passes through the snap ring structure 7 and then enters the wire protection housing 3 to be connected to the wire-end terminal 4 in the wire-end terminal block 1, and then is fastened by a tail nut 9. A cable sealing ring 8 is further arranged in the snap ring structure 7, and the cable sealing ring 8 is sleeved between the cable and the snap ring structure 7.

[0062] As Figure 14As shown, the wire-end terminal 4 includes a terminal body 41 and a spring piece 42. The terminal body 41 is integrally formed by stamping a metal sheet, and the metal sheet is preferably made of phosphor bronze. The terminal body 41 sequentially includes a wiring portion 411 and a plugging portion 412 along its length direction. The wiring portion 411 includes a connecting portion 4111, a supporting portion 4112, and a fixing portion that are connected in sequence. The length direction of the connecting portion 4111 is the same as the length direction of the wire-end terminal 4. The fixing portion is disposed opposite to the connecting portion 4111. One end of the spring piece 42 is connected to the fixing portion, and the other end of the spring piece 42 is a free end. The free end extends and bends toward the side away from the plugging portion 412, and the free end abuts against one side of the connecting portion 4111. The plugging portion 412 includes a first plugging portion 4121 and a second plugging portion 4122. The length directions of both the first plugging portion 4121 and the second plugging portion 4122 are the same as the length direction of the connecting portion 4111. One end of the first plugging portion 4121 is connected to the connecting portion 4111, and one end of the second plugging portion 4122 is connected to the supporting portion 4112. The first plugging portion 4121 and the second plugging portion 4122 are disposed opposite to each other, and the other ends of the first plugging portion 4121 and the second plugging portion 4122 respectively extend away from the spring piece 42.

[0063] The supporting part 4112 is perpendicular to the connecting part 4111, and the fixing part and the connecting part 4111 are respectively located on the same side of the supporting part 4112. The fixing part includes a first fixing part 4113, a second fixing part 4114 and a third fixing part 4115. The length directions of the first fixing part 4113 and the second fixing part 4114 are respectively consistent with the length direction of the connecting part 4111. The first fixing part 4113 and the second fixing part 4114 are arranged at intervals in the length direction, and the third fixing part 4115 is located between the first fixing part 4113 and the connecting part 4111. The elastic sheet 42 sequentially includes a first connecting section 421, a second connecting section 422, an intermediate elastic section 423 and a wire pressing section 424. When the elastic sheet 42 is installed on the terminal body 41, the first connecting section 421 is located between the first fixing part 4113 and the third fixing part 4115, and the second connecting section 422 is located on the side of the second fixing part 4114 away from the connecting part 4111. By designing the first fixing part 4113, the second fixing part 4114 and the third fixing part 4115 in a staggered manner, the elastic sheet 42 can be firmly clamped on the terminal body 41. Of course, in order to ensure the reliability of the installation, the elastic sheet 42 and the fixing parts of the terminal body 41 can also be fixed by welding or other means when necessary. The intermediate elastic section 423 is designed to be bent, which can ensure that the elastic sheet 42 has a certain tension and resilience. The wire pressing section 424 abuts against the connecting part 4111. There is a pre-tightening force between the wire pressing section 424 and the connecting part 4111, which can effectively ensure that there is always a certain clamping force between the wire pressing section 424 and the connecting part 4111. A plurality of wire clamping protrusions 413 are provided on the side of the connecting part 4111 that abuts against the wire pressing section 424, which can increase the friction between the connecting part 4111 and the wire connection, making the connection between the wire connection and the wire end terminal 4 more reliable. A plurality of strip-shaped grooves 414 can also be formed on the side of the connecting part 4111 that abuts against the wire pressing section 424. The plurality of strip-shaped grooves 414 are arranged at intervals along the length direction of the connecting part 4111, further increasing the friction between the connecting part 4111 and the wire connection.

[0064] The first insertion part 4121 sequentially includes a first intermediate transition section 41211 and a first insertion section 41212 along its length direction. One end of the first intermediate transition section 41211 is connected to the connecting part 4111. The other end of the first intermediate transition section 41211 is inclined towards the direction close to the elastic piece 42. The first insertion section 41212 is inclined towards the direction away from the elastic piece 42. The second insertion part 4122 is located on the side of the support part 4112 where the elastic piece 42 is provided. The second insertion part 4122 sequentially includes a connecting section 41221, a second intermediate transition section 41222, and a second insertion section 41223 along its length direction. The connecting section 41221 of the second insertion part 4122 is connected to the support part 4112. The connecting section 41221 of the second insertion part 4122 is parallel to the connecting part 4111. The second intermediate transition section 41222 is inclined towards the direction close to the connecting part 4111. The second insertion section 41223 is inclined towards the direction away from the connecting part 4111. A baffle part 41121 is provided on the side of the support part 4112 where the elastic piece 42 is provided. The baffle part 41121 is perpendicular to both the support part 4112 and the connecting part 4111 respectively, and the baffle part 41121 is close to the connecting part 4111. The baffle part 41121 plays a limiting role. By providing the baffle part 41121, it can prevent the board terminal from being inserted excessively when the board terminal is inserted into the wire terminal 4.

[0065] When the wire terminal 4 is installed in the second accommodation cavity 112, the insertion end of the wire terminal 4 faces the insertion hole 113. The insertion hole 113 is aligned with the middle of the first insertion part 4121 and the second insertion part 4122 of the wire terminal 4. One end of the board terminal 5 can pass through the insertion hole 113 to communicate with the first insertion part 4121 and the second insertion part 4122. The first insertion section 41212 and the second insertion section 41223 can play a guiding role, which can ensure that one end of the board terminal 5 can be smoothly inserted between the first insertion part 4121 and the second insertion part 4122. When the rear cover 13 is clamped to the wire-passing end of the main body 11, the end of the first limiting protrusion 134 on the rear cover 13 abuts against one end of the corresponding wire terminal 4, as Figure 9 and Figure 10 shown, playing a limiting role. One key 6 is installed in each key through hole 131 of the rear cover 13. One end of the key 6 abuts against the middle elastic section 423 of the elastic piece 42 of the wire terminal 4, as Figure 10As shown, pressing the button 6 can cause the pressing section 424 of the elastic sheet 42 to move away from the connecting portion 4111. One end of the supporting portion 4112 away from the plugging portion 412 is provided with a button limiting notch 41122, which can limit the button 6 and prevent the button 6 from being pressed excessively. One side of the button 6 contacts the outer side of the first limiting protrusion 134, and the first limiting protrusion 134 can also guide the button 6 to ensure that the button 6 can move smoothly along the axial direction of the wire end terminal 4.

[0066] As Figures 15 to 19 shown, the board end terminal block 2 includes a board end body 21, and the board end body 21 has a wiring end and a clamping end along its axial direction. The end face of the clamping end extends outward along the axial direction of the board end body 21 to form an annular protrusion 22 and an anti-fooling structure 24. The anti-fooling structure 24 is located within the area surrounded by the annular protrusion 22. Chamfers are provided at the inner corners of the annular protrusion 22. Clamping ears 23 are provided on both sides of the annular protrusion 22. A plurality of first accommodating cavities 211 are arranged in the board end body 21, and the first accommodating cavities 211 respectively penetrate through the wiring end face and the clamping end face of the board end body 21. The first accommodating cavities 211 communicate with the area surrounded by the annular protrusion 22. The board end terminal 5 is installed in the first accommodating cavity 211. The plugging end of the board end terminal 5 extends into the area surrounded by the annular protrusion 22. As Figure 15 shown, the clamping ears 23 are located on both sides of the annular protrusion 22 in the length direction of the board end body 21. The length direction of the clamping ears 23 is consistent with the axial direction of the board end body 21, and the clamping ends of the clamping ears 23 extend away from the board end body 21. A groove 231 is provided on the side of the clamping ear 23 facing the annular protrusion 22. The length direction of the groove 231 is consistent with the length direction of the clamping ear 23. One end of the groove 231 penetrates through the end face of the clamping end of the clamping ear 23. A clamping hole 232 is provided on the clamping ear 23, and the clamping hole 232 communicates with the groove 231. When the board end terminal block 2 is clamped to one end of the wire protection housing 3, the clamping end of the wire protection housing 3 is inserted into the area surrounded by the annular protrusion 22, and the clamping ears 23 on both sides of the annular protrusion 22 are respectively clamped with the corresponding second claws 33, and the board end terminal 5 is plugged with the corresponding wire end terminal 4.

[0067] As Figure 15 and 16As shown, the anti-fooling structure 24 is two long raised strips arranged in parallel at intervals, and the length direction of the long raised strips is the same as the length direction of the board end body 21. A plurality of the first accommodating cavities 211 are all located between the two long raised strips, and a plurality of first anti-fooling grooves 241 are respectively formed on the opposite surfaces of the two long raised strips. The length direction of the first anti-fooling groove 241 is the same as the axial direction of the board end body 21, and a plurality of first anti-fooling grooves 241 located on the same long raised strip are spaced apart along the length direction of the board end body 21. The number of first anti-fooling grooves 241 located on the two long raised strips is different, or the intervals are different, or the sizes are different, or the shapes are different. When the board end terminal base 2 is engaged with one end of the wire protection housing 3, the anti-fooling structure 24 is inserted between the limit structure 111 and the wire protection housing 3, and the first anti-fooling groove 241 on the anti-fooling structure 24 is inserted and connected with the first anti-fooling rib 1111 on the limit structure 111 to play an anti-fooling role and prevent the board end terminal base 2 from being reversely connected with the wire end terminal base 1. Claw grooves 242 are respectively formed on the opposite surfaces of the two long raised strips. One side of the claw groove 242 penetrates through the end face of the extended end of the long raised strip, and the bottom of the claw groove 242 is designed as an inclined surface. The end of the bottom away from the board end body 21 is inclined towards the direction close to the first anti-fooling groove 241. This structural design can ensure that when the board end terminal base 2 is engaged with one end of the wire protection housing 3, the first claw 12 can smoothly enter the claw groove 242, ensuring that the board end terminal base 2 can be smoothly and tightly engaged with one end of the wire protection housing 3.

[0068] In the board end terminal base 2 of this embodiment, a threaded structure 212 can be provided at its wiring end, as Figure 18 shown, the board end terminal base 2 is installed on the surface to be installed through the threaded structure 212 in cooperation with a nut 213. In the board end terminal base 2 of this embodiment, a fixing plate structure 214 can also be provided on the outer peripheral surface of its board end body 21, as Figures 15 to 17 shown, the axis direction of the fixing plate structure 214 is the same as the axis direction of the board end body 21, and the board end terminal base 2 is installed on the surface to be installed through the fixing plate structure 214 in cooperation with a fastener.

[0069] In a further embodiment, the board end terminal base 2 can also be equipped with a sealing cover 25, and the sealing cover 25 is engaged with the engaging end of the board end body 21. The sealing cover 25 seals the area surrounded by the annular protrusion 22 and is used to play a dust-proof role when the connector wire end is disassembled. As Figure 19As shown, the sealing cover 25 includes a cover plate structure 251 and a handle structure 252 provided on one side of the cover plate structure 251. The handle structure 252 is respectively provided with clamping protrusions 253 on both sides in its length direction. When the sealing cover 25 is clamped to the clamping end of the plate end body 21, the cover plate structure 251 seals the area surrounded by the annular protrusion 22. The two ends of the handle structure 252 in its length direction are respectively clamped into the grooves 231 of the two clamping ears 23, and the clamping protrusions 253 are clamped with the corresponding clamping holes 232.

[0070] In this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0071] In this text, the front, rear, upper, lower and other orientation terms are defined based on the positions of the components in the drawings and the positions of the components relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the orientation terms should not limit the scope of protection of the present application.

[0072] Without conflict, the above-mentioned embodiments and the features in the embodiments in this text can be combined with each other. The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An improved multi-core electrical connector, characterized in that, it includes a wire-end terminal block (1), a board-end terminal block (2), a wire protection housing (3), a plurality of wire-end terminals (4) installed in the wire-end terminal block (1), and a plurality of board-end terminals (5) installed in the board-end terminal block (2). The wire-end terminal block (1), the board-end terminal block (2), and the wire protection housing (3) are coaxially arranged. The wire-end terminal block (1) is installed in the wire protection housing (3), the board-end terminal block (2) is snapped onto one end of the wire protection housing (3), the board-end terminals and the wire-end terminals (4) are in one-to-one correspondence, and when the board-end terminal block (2) is snapped onto the wire protection housing (3), the board-end terminals (5) can be inserted into the corresponding wire-end terminals (4); The wire-end terminal block (1) includes a main body (11) and a first claw (12) provided on the main body (11). The main body (11) has a plug end and a wiring end along its axial direction. The plug end of the main body (11) extends outward along its axial direction with a limiting structure (111). One end of the first claw (12) is connected to the plug end of the main body (11). The length direction of the first claw (12) is the same as the axial direction of the main body (11). The first claw (12) is symmetrically arranged on both sides of the limiting structure (111) in the width direction. The wire-end terminal block (1) is snap-connected to the side wall of the wire protection housing (3) through the first claw (12), and the limiting structure (111) faces the board-end terminal block (2); The wire protection housing (3) has a snap-connection end and a wire-passing end along its axial direction. The wire-end terminal block (1) is installed near the snap-connection end. There is a anti-misconnection design between the wire-end terminal block (1) and the wire protection housing (3). The side walls of the wire protection housing (3) are respectively provided with snap-connection through holes (31) at positions corresponding to the first claws (12), and the first claws (12) are snap-connected to the corresponding snap-connection through holes (31).

2. The improved multi-core electrical connector according to claim 1, characterized in that, a first pressing structure (121) and a first convex (122) are provided on the side of the first claw (12) away from the limiting structure (111). The first convex (122) is symmetrically arranged on both sides of the first pressing structure (121) in the length direction of the main body (11). One side of the snap-connection through hole (31) penetrates the end face of the snap-connection end. Second convexes (32) are respectively provided on the two inner walls of the snap-connection through hole (31) in the length direction of the main body (11). When the first claw (12) is snap-connected to the corresponding snap-connection through hole (31), the first pressing structure (121) is located between the two second convexes (32), the first convex (122) is snap-connected to the second convex (32), and the upper surface of the first pressing structure (121) is not higher than the outer wall surface of the wire protection housing (3).

3. The improved multi-core electrical connector according to claim 1, characterized in that, The cable protection housing (3) is respectively provided with second claws (33) on both sides in its length direction. The length direction of the second claws (33) is consistent with the axial direction of the cable protection housing (3). One end of the second claws (33) is connected to the outer wall surface of the cable protection housing (3), and the other end of the second claws (33) is a free end. The free end faces the wire threading end. A third convex (331) is provided on the outer side of the second claws (33), and a second pressing structure (332) is provided at the free end.

4. The improved multi-core electrical connector according to claim 3, wherein, the board-end terminal block (2) includes a board-end body (21). An annular protrusion (22) extends outward along the axial direction of one end face of the board-end body (21). Clamping ears (23) are provided on both sides of the annular protrusion (22). A plurality of first accommodation cavities (211) are provided in the board-end body (21). The first accommodation cavities (211) respectively penetrate through the wiring end face and the engaging end face of the body. The area surrounded by the first accommodation cavities (211) is communicated with the annular protrusion (22). The board-end terminals (5) are installed in the first accommodation cavities (211). The insertion ends of the board-end terminals (5) extend into the area surrounded by the annular protrusion (22). When the board-end terminal block (2) is engaged with one end of the cable protection housing (3), the engaging end of the cable protection housing (3) is inserted into the area surrounded by the annular protrusion (22). The clamping ears (23) on both sides of the annular protrusion (22) are respectively engaged with the corresponding second claws (33). The board-end terminals (5) are inserted and connected with the corresponding wire-end terminals (4).

5. The improved multi-core electrical connector according to claim 4, wherein, an anti-fooling structure (24) is provided in the area surrounded by the annular protrusion (22). When the board-end terminal block (2) is engaged with one end of the cable protection housing (3), the anti-fooling structure (24) is inserted between the limit structure (111) and the cable protection housing (3). An anti-fooling design is provided between the anti-fooling structure (24) and the limit structure (111).

6. The improved multi-core electrical connector according to claim 4, wherein, The wire-end terminal block (1) further includes a rear cover (13). A plurality of second accommodation cavities (112) are provided in the main body (11). The axial direction of the second accommodation cavity (112) is the same as the axial direction of the main body (11). A plurality of insertion holes (113) are formed at the extending end of the limiting structure (111). The insertion holes (113) correspond to the second accommodation cavities (112) one by one. The insertion holes (113) communicate with the corresponding second accommodation cavities (112). The wire-end terminal (4) is installed in the second accommodation cavity (112). The rear cover (13) is snap-fitted to the wiring end of the main body (11). When the board-end terminal block (2) is snap-fitted to one end of the wire protection housing (3), one end of the board-end terminal (5) is inserted into the corresponding wire-end terminal (4) through the insertion hole (113).

7. The improved multi-core electrical connector according to claim 6, wherein, the wire-end terminal includes a terminal body (41) and a spring piece (42). The terminal body (41) sequentially includes a wiring portion (411) and an insertion portion (412) along its length direction. The insertion portion (412) faces the insertion hole (113). The wiring portion (411) includes a connecting portion (4111), a supporting portion (4112), and a fixing portion connected in sequence. The length direction of the connecting portion (4111) is the same as the length direction of the wire-end terminal (4). The fixing portion is disposed opposite to the connecting portion (4111). One end of the spring piece (42) is connected to the fixing portion. The other end of the spring piece (42) is a free end. The free end extends and bends toward the side away from the insertion portion (412). The free end abuts against one side of the connecting portion (4111). The insertion portion (412) includes a first insertion portion (4121) and a second insertion portion (4122). The length directions of both the first insertion portion (4121) and the second insertion portion (4122) are the same as the length direction of the connecting portion (4111). One end of the first insertion portion (4121) is connected to the connecting portion (4111). One end of the second insertion portion (4122) is connected to the supporting portion (4112). The first insertion portion (4121) and the second insertion portion (4122) are disposed opposite to each other. The other ends of the first insertion portion (4121) and the second insertion portion (4122) respectively extend toward the direction away from the spring piece (42).

8. The improved multi-core electrical connector according to claim 7, wherein, A button through hole (131) and a wire threading counterbore (132) are respectively arranged at a position of the rear cover (13) corresponding to each of the second accommodation cavities (112). The button through hole (131) is located at one side of the wire threading counterbore (132) in the width direction of the rear cover (13). A wire threading hole (1321) is formed in the wire threading counterbore (132), and the wire threading hole (1321) penetrates through the rear cover (13). A button (6) is installed in the button through hole (131), and one end of the button (6) abuts against the elastic sheet (42). Pressing the button (6) can make the free end of the elastic sheet (42) move away from the connecting portion (411).

9. The improved multi-core electrical connector according to claim 2, wherein, a plurality of clamping holes (115) are respectively formed in two side walls of the main body (11) in the width direction, and the clamping holes (115) are close to the wire threading end.

10. The improved multi-core electrical connector according to claim 9, wherein, the clamping holes (115) correspond to the accommodation cavities located at the outermost sides in the width direction of the main body (11) one by one, and the clamping holes (115) communicate with the corresponding accommodation cavities. A plurality of second clamping protrusions (133) are respectively arranged at two ends of the rear cover (13) in the width direction. When the rear cover (13) is clamped to the wiring end of the main body (11), the second clamping protrusions (133) correspond to the clamping holes (115) one by one, and the second clamping protrusions (133) are clamped with the corresponding clamping holes (115).

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