An improved multi-core electrical connector

Abstract

The present invention discloses an improved multi-core electrical connector, which includes a wire end terminal seat, a board end terminal seat, a wire protection shell, 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, wherein the wire end terminal seat, the board end terminal seat and the wire protection shell are coaxially arranged, the wire end terminal seat is installed in the wire protection shell, the board end terminal seat is snapped into one end of the wire protection shell, the board end terminal corresponds to the wire end terminal one by one, and when the board end terminal seat is snapped into the wire protection shell, the board end terminal can be plugged into the corresponding wire end terminal. The improved multi-core electrical connector of the present application is small in size, easy to install, and securely snapped into place.

Description

Technical Field

[0001] The invention relates to the technical field of electric connectors, and in particular to an improved multi-core electric connector. Background Art

[0002] Electrical connectors refer to connection elements and their accessories used in electronic signals and power supplies. They are the bridge of all signals. Their quality will affect the reliability of current signal transmission and are closely related to the operation of various electronic systems and electrical equipment. Electrical connectors can be divided into male "plugs" and female "sockets". In order to ensure that the plug can be stably transmitted after being inserted into the socket and will not be easily loosened due to external forces such as vibration and shaking, the industry will design the configuration of the plug and socket to match each other to ensure the connection strength between the plug and the socket during insertion. However, traditional electrical connectors have complex structures, the plug and socket are not convenient to plug in, and the production cost is high. In addition, some traditional electrical connectors do not have a fool-proof design between the plug and the socket. During the process of plugging the plug and the socket, there is a situation of reverse insertion, which leads to connection failure. In severe cases, it will also cause damage to the connector or circuit.

[0003] Male terminals are usually installed in plugs, but the male terminals of traditional electrical connectors are not reasonably designed, have a complex structure, and are expensive to manufacture. They are not easy to install and are not easy to replace when damaged. At the same time, due to the influence of structural design, traditional electrical connectors are often not very small in size. When installed on equipment such as chassis, they will take up a lot of space, and the space utilization rate is not high, which is not conducive to the miniaturization design of the equipment. In addition, when the electrical connector is not in use, the board end and the wire end need to be separated. The board end is provided with a board end terminal, but the traditional electrical connector is not designed with a sealing cover structure. If it is not used for a long time, dust is easily accumulated in the board end, and poor contact will occur when it is used again.

[0004] Therefore, in view of the above-mentioned existing technical problems, it is necessary to propose a new technical solution. Summary of the invention

[0005] The object of the present invention is to provide an electrical connector which is small in size, easy to install and has a reliable clamping connection.

[0006] To achieve the purpose of the invention, 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 shell, 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 shell are coaxially arranged, the wire end terminal seat is installed in the wire protection shell, the board end terminal seat is engaged with one end of the wire protection shell, the board end terminal corresponds to the wire end terminal one by one, and when the board end terminal seat is engaged with the wire protection shell, the board end terminal can be plugged into the corresponding wire end terminal.

[0007] Furthermore, the wire end terminal seat includes a main body and a first claw arranged on the main body, the main body has a plug-in end and a wiring end along its axial direction respectively, the plug-in 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-in end of the main body, the length direction of the first claw is consistent with the axial direction of the main body, the first claw is 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 shell through the first claw, and the limiting structure faces the board end terminal seat.

[0008] Furthermore, the wire protection shell has a clamping end and a wire threading end along its axial direction, the wire end terminal seat is installed at a position close to the clamping end, and an anti-fool design is provided between the wire end terminal seat and the wire protection shell. The side walls of the wire protection shell are respectively provided with clamping through holes at positions corresponding to the first clamping claws, and the first clamping claws are clamped with the corresponding clamping through holes.

[0009] Furthermore, a first pressing structure and a first latching protrusion are provided on the side of the first claw away from the limiting structure, the first latching protrusions are symmetrically arranged on both sides of the first pressing structure in the length direction of the main body, one side of the latching through hole passes through the end face of the latching end, and the two inner walls of the latching through hole in the length direction of the main body are respectively provided with second latching protrusions. When the first claw is latched with the corresponding latching through hole, the first pressing structure is located between the two second latching protrusions, the first latching protrusion is latched with the second latching protrusion, and the upper surface of the first pressing structure is not higher than the outer wall surface of the wire protection shell.

[0010] Furthermore, the wire protection shell is respectively provided with second claws on both sides in the length direction thereof, the length direction of the second claw is consistent with the axial direction of the wire protection shell, one end of the second claw is connected to the outer wall surface of the wire protection shell, the other end of the second claw is a free end, the free end faces the threading end, a third clamping protrusion is provided on the outer side of the second claw, and the free end is provided with a second pressing structure.

[0011] Furthermore, the board-end terminal seat includes a board-end body, one end face of the board-end body has an annular protrusion extending outward along its axial direction, and ears are provided on both sides of the annular protrusion, and a plurality of first accommodating chambers are provided in the board-end body, the first accommodating chambers respectively penetrate the wiring end face and the clamping end face of the body, the first accommodating chamber is connected with the area surrounded by the annular protrusion, the board-end terminal is installed in the first accommodating chamber, and the plug-in end of the board-end terminal extends into the area surrounded by the annular protrusion. When the board-end terminal seat is clamped on one end of the wire protection shell, the clamping end of the wire protection shell is inserted into the area surrounded by the annular protrusion, and the ears on both sides of the annular protrusion are respectively clamped with the corresponding second claws, and the board-end terminal is plugged into the corresponding wire end terminal.

[0012] Furthermore, an anti-foolproof structure is provided in the area surrounded by the annular protrusion, and when the board-end terminal seat is engaged with one end of the wire protection shell, the anti-foolproof structure is inserted between the limiting structure and the wire protection shell, and an anti-foolproof design is provided between the anti-foolproof structure and the limiting structure.

[0013] Furthermore, the wire end terminal seat also includes a back cover, and a plurality of second accommodating cavities are arranged in the main body, and the axial direction of the second accommodating cavities is consistent with the axial direction of the main body. The extending end of the limiting structure is provided with a plurality of plug-in holes, and the plug-in holes correspond one-to-one to the second accommodating cavities. The plug-in holes are connected with the corresponding second accommodating cavities, and the wire end terminal is installed in the second accommodating cavity. The back cover is engaged with the threading end of the main body, and when the board end terminal seat is engaged with one end of the wire protection shell, one end of the board end terminal is plugged into the corresponding wire end terminal through the plug-in hole.

[0014] Furthermore, the line end terminal includes a terminal body and a spring sheet, and the terminal body includes a wiring portion and a plug-in portion in sequence along its length direction, and the plug-in portion faces the plug-in hole, and the wiring portion includes a connecting portion, a supporting portion and a fixing portion connected in sequence, and the length direction of the connecting portion is consistent with the length direction of the line end terminal, and the fixing portion is arranged opposite to the connecting portion, one end of the spring sheet is connected to the fixing portion, and the other end of the spring sheet is a free end, and the free end extends and bends toward a side away from the plug-in portion, and the free end is in conflict with one side of the connecting portion, and the plug-in portion includes a first plug-in portion and a second plug-in portion, and the length directions of the first plug-in portion and the second plug-in portion are both consistent with the length direction of the connecting portion, one end of the first plug-in portion is connected to the connecting portion, and one end of the second plug-in portion is connected to the supporting portion, the first plug-in portion and the second plug-in portion are arranged opposite to each other, and the other ends of the first plug-in portion and the second plug-in portion respectively extend in a direction away from the spring sheet.

[0015] Furthermore, the back cover is respectively provided with a button through hole and a threading countersunk hole corresponding to the position of each of the second accommodating cavities, the button through hole is located on one side of the threading countersunk hole in the width direction of the back cover, a threading hole is opened in the threading countersunk hole, the threading hole passes through the back cover, a button is installed in the button through hole, one end of the button is in contact with the spring sheet, and pressing the button can make the free end of the spring sheet move away from the connecting part.

[0016] The improved multi-core electrical connector of the present application has one or more of the following beneficial effects:

[0017] (1) The improved multi-core electrical connector of the present application has a compact structure, a small size, is easy to install, and has a secure connection;

[0018] (2) The improved multi-core electrical connector of the present application has an annular protrusion extending from one side of the board terminal seat, which can be inserted into the inside of the board terminal seat when engaging with the wire end. On the one hand, it can hide the claws of the wire end terminal installed in the wire protection shell to prevent the wire protection shell from being unlocked due to accidental touch, and on the other hand, it can cooperate with the sealing cover to play a sealing role;

[0019] (3) The improved multi-core electrical connector of the present application has an anti-mistake structure disposed inside the annular protrusion of the board-end terminal seat, which can cooperate with the wire-end terminal seat when engaging with the wire end, playing an anti-mistake effect and ensuring that the wire end of the electrical connector will not be inserted in reverse;

[0020] (4) The improved multi-core electrical connector of the present application has latches on both sides of the board terminal seat, which can cooperate with the latch claws on the wire protection shell to achieve rapid disassembly and assembly, and can also be used to install a sealing cover to seal the area inside the annular protrusion of the board terminal seat;

[0021] (5) The improved multi-core electrical connector of the present application has a compact structure and a small size of the wire end terminal seat, which can be installed in the wire protection housing, thus contributing to the miniaturization of the electrical connector;

[0022] (6) The improved multi-core electrical connector of the present application has a limit structure extending from one side of the wire terminal seat, and the limit structure is respectively designed with a foolproof design between the wire protection housing and the wire terminal seat to prevent the wire end of the electrical connector from being reversely inserted;

[0023] (7) The improved multi-core electrical connector of the present application has a terminal block that is designed to be pressed along its axis, so that more rows of accommodating cavities can be designed as needed to install the terminal blocks, which has a high space utilization rate and can accommodate a large number of terminal blocks;

[0024] (8) In the improved multi-core electrical connector of the present application, when the wire end terminal seat is engaged with the wire protection housing, the first pressing structure on the clamping 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 clamping claw is well hidden to avoid accidental touch and causing the wire protection housing to be unlocked;

[0025] (9) The improved multi-core electrical connector of the present application has a split-type wire end terminal, and the terminal body is integrally formed and can be stamped from a metal plate with a set shape. It has a simple structure and low production cost. It can also select springs of different materials as needed, ensuring excellent elasticity of the springs while being easy to install, and the electrical connector is easy to assemble.

[0026] (10) The improved multi-core electrical connector of the present application has a baffle portion provided on the wire end terminal, which plays a limiting role and can prevent the board end terminal from being over-inserted when the board end terminal and the wire end terminal are plugged together;

[0027] (11) The improved multi-core electrical connector of the present application has a key limiting slot at one end of the wire end terminal support portion away from the plug-in portion, which can play the role of limiting the key and preventing the key from being over-pressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a multi-core electrical connector provided in this embodiment;

[0029] Figure 2 A schematic diagram of the exploded structure of a multi-core electrical connector provided in this embodiment;

[0030] Figure 3 A schematic diagram of the exploded structure of the wire end terminal block provided in this embodiment;

[0031] Figure 4 A schematic diagram of the three-dimensional structure of the wire end terminal block body provided in this embodiment in one direction;

[0032] Figure 5 A schematic diagram of the three-dimensional structure of the wire end terminal block body provided in this embodiment in the second direction;

[0033] Figure 6 A schematic diagram of the structure of the wire end terminal block body provided in this embodiment when viewed from the side;

[0034] Figure 7 A schematic diagram of the structure of the rear cover of the wire end terminal block provided in this embodiment;

[0035] Figure 8 A schematic diagram of the structure of the wire end terminal block provided in this embodiment when viewed from above;

[0036] Fig. 9 for Figure 8 A cross-sectional view at point A;

[0037] Fig.10 A schematic diagram of the installation positions of the wire terminal, the button and the rear cover when the wire terminal seat body is removed provided in this embodiment;

[0038] Fig.11 A schematic diagram of the installation position between the wire end terminal block and the wire protection housing provided in this embodiment;

[0039] Fig.12 A schematic diagram of the three-dimensional structure of the wire protection housing provided in this embodiment;

[0040] Fig.13 A schematic diagram of the structure of the wire protection housing provided in this embodiment when viewed from above;

[0041] Fig.14 A schematic diagram of the three-dimensional structure of the wire end terminal provided in this embodiment;

[0042] Fig.15 A schematic diagram of the three-dimensional structure of the board terminal block provided in this embodiment;

[0043] Fig.16 A schematic diagram of the structure of the board terminal block provided in this embodiment when the board terminal is installed;

[0044] Fig.17 A schematic diagram of the structure of the board terminal block provided in this embodiment in the axial direction;

[0045] Fig.18 A schematic diagram of the three-dimensional structure of another board terminal block provided in this embodiment;

[0046] Fig.19 A schematic diagram of the structure of the board terminal block provided in this embodiment when a sealing cover is installed.

[0047] Among them, 1-wire end terminal seat, 11-main body, 111-limiting structure, 1111-first anti-fool rib, 112-second accommodating cavity, 113-plug hole, 114-second anti-fool rib, 115-card hole, 12-first claw, 121-first pressing structure, 122-first card convex, 13-back cover, 131-button through hole, 1311-groove, 132-threading countersunk hole, 1321-threading hole, 133-second card convex, 134-first limiting protrusion, 135 - second limiting protrusion, 2- board terminal seat, 21- board body, 211- first accommodating cavity, 212- threaded structure, 213- nut, 214- plate fixing structure, 22- annular protrusion, 23- card ear, 231- groove, 232- card hole, 24- foolproof structure, 241- first foolproof groove, 242- claw groove, 25- sealing cover, 251- cover plate structure, 252- handle structure, 253- card protrusion, 3- wire protection shell, 31- card through hole, 32 - second clamping protrusion, 33 - second clamping claw, 331 - third clamping protrusion, 332 - second pressing structure, 34 - second foolproof 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 - plug-in part, 4121 - first plug-in part, 4121 1-first intermediate transition section, 41212-first plug-in section, 4122-second plug-in section, 41221-connecting section, 41222-second intermediate transition section, 41223-second plug-in section, 413-wire-clamping protrusion, 414-bar-shaped groove, 42-spring, 421-first connecting section, 422-second connecting section, 423-middle elastic section, 424-wire-pressing section, 5-board terminal, 6-button, 7-clamping ring structure, 8-cable sealing ring, 9-tail nut. DETAILED DESCRIPTION

[0048] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0049] Example

[0050] 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 protection shell 3. Figure 1 and Figure 2As shown. Several wire end terminals 4 are installed in the wire end terminal block 1, and several board end terminals 5 are installed in the board end terminal block 2. In this embodiment, the scheme is explained by taking an 18-core electrical connector as an example, 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 engaged at one end of the wire protection housing 3. The board end terminal 5 corresponds to the wire end terminal 4 one by one, and when the board end terminal block 2 is engaged with the wire protection housing 3, the board end terminal 5 can be plugged into the corresponding wire end terminal 4.

[0051] like Figure 3 As shown, the wire end terminal block 1 includes a main body 11 and a rear cover 13. Figures 4 to 6 As shown, the main body 11 has a plug-in end and a threading end along its axial direction. The plug-in end of the main body 11 extends outward along its axial direction to form a limiting structure 111. A plurality of second accommodating chambers 112 are arranged in the main body 11, and the axial direction of the second accommodating chambers 112 is consistent with the axial direction of the main body 11. The end of the second accommodating chamber 112 facing the threading end is connected to the outside of the main body 11. A plurality of plug-in holes 113 are provided at the extending end of the limiting structure 111, and the plug-in holes 113 correspond to the second accommodating chambers 112 one by one, and the plug-in holes 113 are connected to the corresponding second accommodating chambers 112. A first claw 12 is provided on the main body 11, and the clamping end of the first claw 12 faces the plug-in end. The back cover 13 is engaged with the threading end of the main body 11, as shown in FIG. Figure 8 shown.

[0052] like Figure 5 As shown, the length direction of the limiting structure 111 is consistent with 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. The plurality of plug holes 113 are divided into multiple rows along the width direction of the limiting structure 111, and the multiple plug holes 113 in each row are arranged at intervals along the length direction of the limiting structure 111. This embodiment takes an 18-core electrical connector as an example to illustrate the scheme, so Figure 5 There are two rows of plug holes 113 in total on the main body 11 of the terminal block 1 shown in the figure. Each row is provided with 9 plug holes 113. Of course, in the specific implementation, other rows can also be provided on the main body 11 of the terminal block 1, and each row can also include other multiple plug holes 113. For example, a 30-core electrical connector can be provided with three rows, and each row is provided with 10 plug holes 113. Correspondingly, the second accommodating cavity 112 is arranged in the main body 11 according to the same rule as the plug holes 113.

[0053] The limiting structure 111 is provided with a plurality of first anti-fouling ribs 1111 on both sides in the width direction. Figure 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.

[0054] 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.

[0055] like Figure 5As shown, the main body 11 is provided with a plurality of second fool-proofing ribs 114 on both sides of its length direction. The length direction of the second fool-proofing ribs 114 is consistent with the axial direction of the main body 11, and the plurality of second fool-proofing ribs 114 on the same side are spaced apart along the width direction of the main body 11. Preferably, the main body 11 is provided with two second fool-proofing ribs 114 on both sides of its length direction, and the intervals between the second fool-proofing ribs 114 on both sides of the main body 11 are different, which can play a fool-proofing role. Of course, the second fool-proofing ribs 114 can also play a fool-proofing role by means of different numbers, different sizes, or different shapes.

[0056] like Figure 4 or Figure 5 As shown, the two side walls of the main body 11 in the width direction are respectively provided with a plurality of clamping holes 115, and the clamping holes 115 are close to the threading end. The clamping holes 115 correspond one-to-one with the accommodating cavities located at the outermost side of the width direction of the main body 11, and the clamping holes 115 are connected with the corresponding accommodating cavities. The two ends of the rear cover 13 in the width direction are respectively provided with a plurality of second clamping protrusions 133, and when the rear cover 13 is clamped on the threading end of the main body 11, the second clamping protrusions 133 correspond one-to-one with the clamping holes 115, and the second clamping protrusions 133 are clamped with the corresponding clamping holes 115.

[0057] like Figure 3 and Fig. 9 As shown, the rear cover 13 is provided with a button through hole 131 and a threading countersunk hole 132 at the position corresponding to each of the second accommodating cavities 112. The button through hole 131 is located on one side of the threading countersunk hole 132 in the width direction of the rear cover 13, and a threading hole 1321 is provided in the threading countersunk hole 132, and the threading hole 1321 passes through the rear cover 13. On the opposite surface of the rear cover 13 and the main body 11, a first limiting protrusion 134 is provided at the position corresponding to each of the threading countersunk holes 132, and the threading hole 1321 passes through the first limiting protrusion 134, as shown in FIG. Figure 7 As shown. On one side of the rear cover 13 away from the main body 11, the button through hole 131 is provided with second limiting protrusions 135 on both sides of the length direction of the rear cover 13. The length direction of the second limiting protrusion 135 is consistent with the width direction of the rear cover 13. One side of the second limiting protrusion 135 is aligned with the inner wall of the button through hole 131. The button through hole 131 is provided with grooves 1311 on the inner walls on both sides of the length direction of the rear cover 13, and the length direction of the groove 1311 is consistent with the axial direction of the button through hole 131. One end of the groove 1311 extends to one side of the second limiting protrusion 135 and passes through the end of the second limiting protrusion 135.

[0058] like Fig.11 As shown, the wire end terminal seat 1 is clamped with the side wall of the wire protection housing 3 through the first clamping claw 12, and the limiting structure 111 faces the board end terminal seat 2. The wire protection housing 3 has a clamping end and a threading end along its axial direction. The wire end terminal seat 1 is installed at a position close to the clamping end. The side wall of the wire protection housing 3 is provided with clamping through holes 31 at positions corresponding to the first clamping claw 12, and the first clamping claw 12 is clamped with the corresponding clamping through hole 31. Fig.12 and Fig.13 As shown, one side of the engaging through hole 31 passes through the end surface of the engaging end, and the engaging through hole 31 is provided with a second engaging protrusion 32 on the two inner walls in the length direction of the main body 11, respectively. When the first clamping claw 12 is engaged with the corresponding engaging through hole 31, the first pressing structure 121 is located between the two second engaging protrusions 32, and the first engaging protrusion 122 is engaged with the second engaging 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. The wire protection housing 3 is provided with a second clamping claw 33 on both sides in the length direction thereof, and the length direction of the second clamping claw 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, and the other end of the second clamping claw 33 is a free end, and the free end faces the threading end. A third clamping protrusion 331 is provided on the outer side of the second clamping claw 33, and a second pressing structure 332 is provided on the free end. The inner wall of the wire protection housing 3 is provided with a second fool-proof groove 34. When the wire end terminal block 1 is installed in the wire protection housing 3, the second fool-proof ribs 114 on both sides of the main body 11 of the wire end terminal block 1 cooperate with the second fool-proof groove 34 to play a fool-proof role and prevent the wire end terminal block 1 from being installed in the wrong direction. The threading end of the wire protection housing 3 is provided with a threaded structure, and a toothed structure is provided at its end position. A clamping ring structure 7 is provided at the threading end of the wire protection housing 3, and the toothed structure on the clamping ring structure 7 is engaged with the toothed structure at one end of the wire protection housing 3. The cable is inserted from the clamping ring structure 7 into the wire protection housing 3 and connected to the wire end terminal 4 in the wire end terminal block 1, and then fastened by the tail nut 9. A cable sealing ring 8 is also provided in the clamping ring structure 7, and the cable sealing ring 8 is sleeved between the cable and the clamping ring structure 7.

[0059] like Fig.14As shown, the line terminal 4 includes a terminal body 41 and a spring 42. The terminal body 41 is formed by stamping a metal plate, and the metal plate is preferably made of phosphor bronze. The terminal body 41 includes a wiring portion 411 and a plug-in portion 412 in sequence along its length direction. 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 consistent with the length direction of the line terminal 4. The fixing portion is arranged opposite to the connecting portion 4111, one end of the spring 42 is connected to the fixing portion, and the other end of the spring 42 is a free end, the free end extends and bends toward a side away from the plug-in portion 412, and the free end contacts one side of the connecting portion 4111. The plug-in portion 412 includes a first plug-in portion 4121 and a second plug-in portion 4122, the length directions of the first plug-in portion 4121 and the second plug-in portion 4122 are both consistent with the length direction of the connecting portion 4111, one end of the first plug-in portion 4121 is connected to the connecting portion 4111, and one end of the second plug-in portion 4122 is connected to the supporting portion 4112, the first plug-in portion 4121 and the second plug-in portion 4122 are arranged opposite to each other, and the other end of the first plug-in portion 4121 and the other end of the second plug-in portion 4122 respectively extend in a direction away from the spring sheet 42.

[0060] The supporting portion 4112 is perpendicular to the connecting portion 4111, and the fixing portion and the connecting portion 4111 are respectively located on the same side of the supporting portion 4112. The fixing portion includes a first fixing portion 4113, a second fixing portion 4114 and a third fixing portion 4115. The length direction of the first fixing portion 4113 and the length direction of the second fixing portion 4114 are respectively consistent with the length direction of the connecting portion 4111. The first fixing portion 4113 and the second fixing portion 4114 are spaced apart in the length direction, and the third fixing portion 4115 is located between the first fixing portion 4113 and the connecting portion 4111. The spring piece 42 includes a first connecting section 421, a second connecting section 422, an intermediate elastic section 423 and a pressing section 424 in sequence. When the spring sheet 42 is installed on the terminal body 41, the first connecting section 421 is located between the first fixing portion 4113 and the third fixing portion 4115, and the second connecting section 422 is located on the side of the second fixing portion 4114 away from the connecting portion 4111. By staggering the first fixing portion 4113, the second fixing portion 4114 and the third fixing portion 4115, the spring sheet 42 can be firmly clamped on the terminal body 41. Of course, in order to ensure the reliability of the installation, the spring sheet 42 and the fixing portions of the terminal body 41 can also be fixed by welding or the like when necessary. The middle elastic section 423 is a curved design, which can ensure that the spring sheet 42 has a certain tension and resilience. The pressing section 424 conflicts with the connecting portion 4111. There is a pre-tightening force between the pressing section 424 and the connecting portion 4111, which can effectively ensure that there is always a certain clamping force between the pressing section 424 and the connecting portion 4111. A plurality of wire-gripping protrusions 413 are provided on the side where the connecting portion 4111 contacts the wire pressing section 424, which can increase the friction between the connecting portion 4111 and the wire, making the connection between the wire and the wire end terminal 4 more secure. A plurality of strip grooves 414 can also be provided on the side where the connecting portion 4111 contacts the wire pressing section 424, and the plurality of strip grooves 414 are arranged at intervals along the length direction of the connecting portion 4111, further increasing the friction between the connecting portion 4111 and the wire.

[0061] The first plug-in portion 4121 includes a first intermediate transition section 41211 and a first plug-in section 41212 in sequence along its length direction, one end of the first intermediate transition section 41211 is connected to the connecting portion 4111, the other end of the first intermediate transition section 41211 is inclined toward the direction approaching the spring sheet 42, and the first plug-in section 41212 is inclined toward the direction away from the spring sheet 42. The second plug-in portion 4122 is located at the side of the support portion 4112 where the elastic sheet 42 is provided. The second plug-in portion 4122 includes a connecting section 41221, a second intermediate transition section 41222 and a second plug-in section 41223 in sequence along its length direction. The connecting section 41221 of the second plug-in portion 4122 is connected to the support portion 4112. The connecting section 41221 of the second plug-in portion 4122 is parallel to the connecting portion 4111. The second intermediate transition section 41222 is inclined toward the direction close to the connecting portion 4111. The second plug-in section 41223 is inclined toward the direction away from the connecting portion 4111. A baffle portion 41121 is provided at the side of the support portion 4112 where the elastic sheet 42 is provided. The baffle portion 41121 is perpendicular to the support portion 4112 and the connecting portion 4111, respectively, and is close to the connecting portion 4111. The baffle portion 41121 plays a limiting role. By providing the baffle portion 41121, it is possible to prevent the board end terminal from being over-inserted when the board end terminal is plugged into the line end terminal 4.

[0062] When the wire end terminal 4 is installed in the second accommodating cavity 112, the plug-in end of the wire end terminal 4 faces the plug-in hole 113, and the plug-in hole 113 is aligned with the middle of the first plug-in portion 4121 and the second plug-in portion 4122 of the wire end terminal 4. One end of the board end terminal 5 can pass through the plug-in hole 113 to connect with the first plug-in portion 4121 and the second plug-in portion 4122. The first plug-in section 41212 and the second plug-in section 41223 can play a guiding role, which can ensure that one end of the board end terminal 5 can be smoothly inserted between the first plug-in portion 4121 and the second plug-in portion 4122. When the rear cover 13 is engaged with the threading end of the main body 11, the end of the first limiting protrusion 134 on the rear cover 13 contacts with the corresponding end of the wire end terminal 4, such as Fig. 9 and Fig.10 A button 6 is installed in each button through hole 131 of the rear cover 13, and one end of the button 6 abuts against the middle elastic section 423 of the spring 42 of the wire end terminal 4. Fig.10As shown, pressing the button 6 can make the pressing line segment 424 of the spring 42 move away from the connecting portion 4111. A button limiting notch 41122 is provided at one end of the support portion 4112 away from the plug-in portion 412, and the button limiting notch 41122 can limit the button 6 to prevent the button 6 from being over-pressed. 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 line terminal 4.

[0063] like Figures 15 to 19 As shown, the board terminal seat 2 includes a board body 21, and the board body 21 has a wiring terminal and a clamping end along its axial direction. The end face of the clamping end has an annular protrusion 22 and an anti-fool structure 24 extending outward along the axial direction of the board body 21. The anti-fool structure 24 is located in the area surrounded by the annular protrusion 22. The inner corners of the annular protrusion 22 are provided with chamfers. Ears 23 are provided on both sides of the annular protrusion 22. A plurality of first accommodating cavities 211 are provided in the board body 21, and the first accommodating cavities 211 respectively penetrate the wiring terminal end face and the clamping end end face of the board body 21. The first accommodating cavity 211 is connected with the area surrounded by the annular protrusion 22. The board terminal 5 is installed in the first accommodating cavity 211. The plug-in end of the board terminal 5 extends into the area surrounded by the annular protrusion 22. As shown Fig.15 As shown, the ear 23 is located on both sides of the annular protrusion 22 in the length direction of the board end body 21, the length direction of the ear 23 is consistent with the axial direction of the board end body 21, and the clamping end of the ear 23 extends in the direction away from the board end body 21. The ear 23 is provided with a groove 231 on one side facing the annular protrusion 22, the length direction of the groove 231 is consistent with the length direction of the ear 23, one end of the groove 231 passes through the end surface of the clamping end of the ear 23, and the ear 23 is provided with a clamping hole 232, which is connected with the groove 231. When the board end terminal seat 2 is clamped in one end of the wire protection shell 3, the clamping end of the wire protection shell 3 is inserted into the area surrounded by the annular protrusion 22, the ears 23 on both sides of the annular protrusion 22 are clamped with the corresponding second claws 33, and the board end terminal 5 is plugged with the corresponding wire end terminal 4.

[0064] like Fig.15 and 16As shown, the foolproof structure 24 is two parallel and spaced long protrusions, and the length direction of the long protrusions is consistent with the length direction of the board end body 21. A plurality of the first accommodating chambers 211 are located between the two long protrusions, and a plurality of first foolproof grooves 241 are respectively provided on the opposite surfaces of the two long protrusions. The length direction of the first foolproof groove 241 is consistent with the axial direction of the board end body 21, and the plurality of first foolproof grooves 241 located on the same long protrusion are spaced along the length direction of the board end body 21, and the first foolproof grooves 241 located on the two long protrusions are different in number, or at different intervals, or in different sizes, or in different shapes. When the board terminal block 2 is engaged with one end of the wire protection housing 3, the fool-proof structure 24 is inserted between the limiting structure 111 and the wire protection housing 3, and the first fool-proof groove 241 on the fool-proof structure 24 is plugged with the first fool-proof rib 1111 on the limiting structure 111, which plays a fool-proof role and prevents the board terminal block 2 from being reversely connected with the wire terminal block 1. Claw grooves 242 are respectively provided on the diverging surfaces of the two long protrusions, one side of the claw groove 242 passes through the extended end surface of the long protrusion, and the bottom of the claw groove 242 is designed as an inclined surface, and the end of the groove bottom away from the board end body 21 is inclined toward the direction close to the first fool-proof groove 241. This structural design can ensure that when the board terminal block 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 terminal block 2 can be smoothly and tightly engaged with one end of the wire protection housing 3.

[0065] The board terminal block 2 of this embodiment may be provided with a thread structure 212 at its wiring end, such as Fig.18 As shown, the board terminal seat 2 is mounted on the surface to be mounted by means of the threaded structure 212 and the nut 213. The board terminal seat 2 of this embodiment may also be provided with a fixing plate structure 214 on the outer peripheral surface of the board end body 21, such as Figures 15 to 17 As shown, the axial direction of the plate fixing structure 214 is consistent with the axial direction of the board end body 21 , and the board end terminal seat 2 is installed on the surface to be installed through the plate fixing structure 214 and the fasteners.

[0066] In a further embodiment, the board terminal block 2 may also be equipped with a sealing cover 25, which is engaged with the engaging end of the board terminal body 21, and the sealing cover 25 seals the area surrounded by the annular protrusion 22 to prevent dust when the connector wire end is removed. Fig.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 provided with locking protrusions 253 on both sides of its length direction. When the sealing cover 25 is engaged with the engaging end of the plate end body 21, the cover plate structure 251 seals the area surrounded by the annular protrusion 22. The handle structure 252 is respectively engaged in the grooves 231 of the two ears 23 at both ends of its length direction, and the locking protrusions 253 are engaged with the corresponding locking holes 232.

[0067] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0068] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0069] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is 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 comprises a wire end terminal block (1), a board end terminal block (2), a wire protection shell (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 shell (3) are coaxially arranged; the wire end terminal block (1) is installed in the wire protection shell (3); the board end terminal block (2) is engaged with one end of the wire protection shell (3); the board end terminals correspond to the wire end terminals (4) one by one; when the board end terminal block (2) is engaged with the wire protection shell (3), the board end terminals (5) can be plugged into the corresponding wire end terminals (4); The wire end terminal seat (1) comprises a main body (11) and a first clamping claw (12) arranged on the main body (11), a plurality of second accommodating cavities (112) are arranged in the main body (11), the main body (11) has a plug-in end and a wiring end respectively along its axial direction, the plug-in end of the main body (11) extends outwardly along its axial direction to form a limiting structure (111), one end of the first clamping claw (12) is connected to the plug-in end of the main body (11), the length direction of the first clamping claw (12) is consistent with the axial direction of the main body (11), the first clamping claw (12) is symmetrically arranged on both sides of the limiting structure (111) in the width direction, the wire end terminal seat (1) is clamped with the side wall of the wire protection shell (3) through the first clamping claw (12), and the limiting structure (111) faces the board end terminal seat (2); The wire protection housing (3) has a clamping end and a wire threading end along its axial direction, the wire end terminal seat (1) is installed at a position close to the clamping end, and a foolproof design is provided between the wire end terminal seat (1) and the wire protection housing (3). The side wall of the wire protection housing (3) is provided with clamping through holes (31) at positions corresponding to the first clamping claws (12), and the first clamping claws (12) are clamped with the corresponding clamping through holes (31); A first pressing structure (121) and a first clamping protrusion (122) are provided on a side of the first clamping claw (12) away from the limiting structure (111); 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); one side of the clamping through hole (31) passes through the end surface 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 clamped with 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 clamped with 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); The wire protection housing (3) is provided with second claws (33) on both sides in the length direction thereof, the length direction of the second claw (33) is consistent with the axial direction of the wire protection housing (3), one end of the second claw (33) is connected to the outer wall surface of the wire protection housing (3), the other end of the second claw (33) is a free end, the free end faces the threading end, a third clamping protrusion (331) is provided on the outer side of the second claw (33), and the free end is provided with a second pressing structure (332); The wire end terminal seat (1) further comprises a rear cover (13); the wire end terminal comprises a terminal body (41) and a spring (42); the terminal body (41) comprises a wiring portion (411) and a plug-in portion (412) in sequence along its length direction; the wiring portion (411) comprises a connecting portion (4111); The rear cover (13) is provided with a button through hole (131) and a threading countersunk hole (132) at a position corresponding to each of the second accommodating cavities (112), the button through hole (131) being located on one side of the threading countersunk hole (132) in the width direction of the rear cover (13), the threading countersunk hole (132) being provided with a threading hole (1321), the threading hole (1321) passing through the rear cover (13), a button (6) being installed in the button through hole (131), one end of the button (6) being in contact with the spring sheet (42), and pressing the button (6) can cause the free end of the spring sheet (42) to move away from the connecting portion (4111).

2. The improved multi-core electrical connector according to claim 1, characterized in that: The board-end terminal seat (2) comprises a board-end body (21), one end face of the board-end body (21) is provided with an annular protrusion (22) extending outwardly along its axial direction, and two sides of the annular protrusion (22) are provided with latches (23), and a plurality of first accommodating cavities (211) are provided in the board-end body (21), and the first accommodating cavities (211) respectively penetrate the wiring end face and the engaging end face of the body, and the first accommodating cavities (211) are communicated with the area enclosed by the annular protrusion (22), and the board-end terminal (5) is installed in the first accommodating cavity (211), the plug-in end of the board-end terminal (5) extends into the area surrounded by the annular protrusion (22), and when the board-end terminal seat (2) is engaged with one end of the wire protection shell (3), the clamping end of the wire protection shell (3) is inserted into the area surrounded by the annular protrusion (22), the 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 into the corresponding wire-end terminal (4).

3. The improved multi-core electrical connector according to claim 2, characterized in that: An anti-fool-proof structure (24) is provided in the area enclosed by the annular protrusion (22); when the board-end terminal seat (2) is engaged with one end of the wire protection housing (3), the anti-fool-proof structure (24) is inserted between the limiting structure (111) and the wire protection housing (3); and an anti-fool-proof design is provided between the anti-fool-proof structure (24) and the limiting structure (111).

4. The improved multi-core electrical connector according to claim 2, characterized in that: The axial direction of the second accommodating cavity (112) is consistent with the axial direction of the main body (11); a plurality of plug holes (113) are provided at the extended end of the limiting structure (111); the plug holes (113) correspond to the second accommodating cavity (112) one by one; the plug holes (113) are communicated with the corresponding second accommodating cavity (112); the wire end terminal (4) is installed in the second accommodating cavity (112); the rear cover (13) is engaged with the threading end of the main body (11); when the board terminal seat (2) is engaged with one end of the wire protection housing (3), one end of the board terminal (5) is plugged into the corresponding wire end terminal (4) through the plug hole (113).

5. The improved multi-core electrical connector according to claim 4, characterized in that: The plug-in portion (412) faces the plug-in hole (113); the wiring portion (411) comprises a connecting portion (4111), a supporting portion (4112) and a fixing portion which are connected in sequence; the length direction of the connecting portion (4111) is consistent with the length direction of the wire end terminal (4); the fixing portion and the connecting portion (4111) are arranged opposite to each other; one end of the spring sheet (42) is connected to the fixing portion; the other end of the spring sheet (42) is a free end; the free end extends and bends toward a side away from the plug-in portion (412); the free end contacts a side of the connecting portion (4111); the plug-in portion (412) comprises a first plug-in portion The first plug-in portion (4121) and the second plug-in portion (4122) are respectively provided with a first plug-in portion (4121) and a second plug-in portion (4122), the length direction of the first plug-in portion (4121) and the length direction of the second plug-in portion (4122) are both consistent with the length direction of the connecting portion (4111), one end of the first plug-in portion (4121) is connected to the connecting portion (4111), and one end of the second plug-in portion (4122) is connected to the supporting portion (4112), the first plug-in portion (4121) and the second plug-in portion (4122) are arranged opposite to each other, and the other end of the first plug-in portion (4121) and the other end of the second plug-in portion (4122) respectively extend in a direction away from the spring sheet (42).

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