Electric connector

Abstract

The utility model discloses an electric connector. Relates to the connector field. Comprising an insulating shell; a terminal housed inside the housing and connected to an end portion of a conductive wiring substrate; an alignment plate which is mounted on the housing and has a terminal accommodating hole into which the front end portion of the terminal is inserted; the terminal includes: a terminal body extending toward a conductor portion along a surface of the wiring substrate; an extension portion extending from the terminal body in a direction intersecting and separating from the surface of the wiring substrate; the extension part is inserted into the terminal accommodating hole of the alignment plate; and the shell is covered with a 3, 5-dinitrobenzoyl chloride coating. According to the electric connector provided by the utility model, the terminal body is provided with the extension part which extends along the cross direction of the surface of the wiring substrate, and the extension part is inserted into the terminal accommodating hole of the alignment plate, so that the extension part of the terminal can be corrected through the alignment plate, thereby being positioned to a preset position and contacted with the wiring substrate. Thus, stable connection between the terminal and the wiring substrate can be realized, and the reliability of the connector can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of connector, concretely is a kind of electric connector. BACKGROUND

[0002] Connector is generally composed of shell and terminal. Terminal is received in the shell, and is connected with the cable. In recent years, as cable, FFC (flexible flat cable) and other flat shape cables are widely used;

[0003] As this type of connector, the shell bottom surface contacts with the circuit board, the contact point (Contact) extends towards the circuit board, and is fixed and kept in position by alignment plate to achieve the use effect;

[0004] The existing connector can correct the deviation of the contact point (terminal) in the width direction by the alignment plate. However, due to the limitation of manufacturing process, the front end of the contact point (terminal) is usually a broken surface, which causes the rough burr surface on the front end surface, and the deviation of the contact point (terminal) in the height direction cannot be corrected by the alignment plate. Therefore, when the circuit board is mounted on the shell, the front end of the contact point (terminal) may not be correctly mated with the connecting part of the circuit board, so that there is a risk of poor installation;

[0005] Secondly, the shell is made of pure insulating resin material, which has poor stability under extreme weather conditions, and is not suitable for harsh application scenarios such as industry, aerospace and automotive electronics. INVENTION CONTENTS

[0006] The purpose of the present application is to provide a technical solution to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution:

[0008] An electric connector includes a shell having insulating properties;

[0009] A terminal received in the shell and connected with an end portion of a wiring base having conductive properties;

[0010] An alignment plate installed on the shell and having a terminal receiving hole for inserting the front end of the terminal;

[0011] The terminal includes a terminal body extending towards a conductor portion along the surface of the wiring base;

[0012] An extension portion extending from the terminal body in a direction intersecting the surface of the wiring base and away from it; the extension portion is inserted into the terminal receiving hole of the alignment plate;

[0013] The shell is covered with a 3,5-dinitrobenzoyl chloride coating.

[0014] Preferably, the terminal is provided with a bent portion between the terminal body and the extension portion, and the bent portion is in contact with the conductor portion of the wiring substrate.

[0015] Preferably, the terminal receiving hole is provided with an enlarged diameter portion at an entrance portion into which the front end portion of the terminal is inserted.

[0016] Preferably, the alignment plate has an elongated structure extending in the width direction of the housing, each side portion of the housing in the width direction is provided with a pair of mounting grooves extending in a direction intersecting the surface of the wiring substrate, and each end portion of the alignment plate in the long axis direction is fitted into the pair of mounting grooves of the alignment plate.

[0017] Preferably, the pair of mounting grooves are provided with retaining protrusions for positioning each end portion of the alignment plate in the long axis direction.

[0018] In summary, the technical effects and advantages of the utility model are as follows:

[0019] The electrical connector of the utility model is provided with an extension portion extending in the intersecting direction of the surface of the wiring substrate on the terminal body, and the extension portion is inserted into the terminal receiving hole of the alignment plate, so that the extension portion of the terminal can be corrected by the alignment plate and positioned to the predetermined position and in contact with the wiring substrate. Thus, stable connection of the terminal and the wiring substrate can be achieved, and the reliability of the connector is improved.

[0020] The 3,5-dinitrobenzoyl chloride coating covering the inside or outside surface of the connector housing of the scheme forms a covalent bond with the surface of the substrate through the acyl chloride (-COCl) group, which can improve the adhesion of the 3,5-dinitrobenzoyl chloride coating to the housing. Meanwhile, the nitro group (-NO2) at the 3,5-position provides excellent oxidation resistance and chemical corrosion resistance, so that the 3,5-dinitrobenzoyl chloride coating remains stable in high temperature (>300°C), strong acid and alkali environment and extreme climate conditions, and has high hardness, wear resistance and ultraviolet aging resistance. Therefore, the product is suitable for harsh application scenarios such as industry, aerospace and automobile electronics. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a perspective view of the utility model.

[0023] Figure 2 It is an explosion schematic view of the utility model.

[0024] Figure 3 The alignment plate structure diagram of the utility model.

[0025] Figure 4 The partial plan view of the alignment plate installed on the shell of the utility model.

[0026] Figure 5 The connection state section view of the wire connecting portion of the terminal and the conductor portion of the wiring base of the utility model.

[0027] Figure 6 The assembly process schematic view of the terminal and the alignment plate of the utility model.

[0028] Figure 7 The another assembly process schematic view of the terminal and the alignment plate of the utility model.

[0029] Figure 8 The another assembly process schematic view of the terminal and the alignment plate of the utility model.

[0030] Figure 9 The another assembly process schematic view of the terminal and the alignment plate of the utility model. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] Please refer to Figures 1-9 :

[0033] Figure 1 The structure diagram of the wire harness (Wire Harness, WH) applicable to the embodiment. Figure 2 The exploded structure view of the wire harness, showing its components. As shown in the figure, the wire harness WH of the embodiment is composed of the following parts: the wiring base W, the first connector 11, the second connector 12; the wire harness WH is used for connecting the vehicle-mounted equipment, realizing power supply and signal transmission. Through the first connector 11 and the second connector 12, the wiring base W is connected to different equipment. The focus of the application is the first connector 11, while the second connector 12 serves as its detachable counter connector.

[0034] For the convenience of description, the following coordinate directions are defined:

[0035] X direction: the direction (front-rear direction) in which the first connector 11 and the second connector 12 are connected, the X direction has a certain length;

[0036] Y direction: width direction, perpendicular to the X direction. The Y direction has a certain width;

[0037] Z direction: height direction, perpendicular to both the X and Y directions; the Z direction has a certain thickness.

[0038] The wiring base W is specifically a conductive component that extends linearly in the X direction and maintains the same diameter in the X direction. In this embodiment, the wiring base W is a flat cable, such as:

[0039] FPC (Flexible Printed Circuit)

[0040] Other flexible printed wiring boards (Flexible Printed Wiring Board)

[0041] An FPC is composed of two main materials: (1) an insulating flexible base film (polyimide); and (2) a conductive metal (copper foil, etc.) for forming a circuit.

[0042] Its end is provided with a fixed hole Wa penetrating in the Z direction, located on both sides of the wiring base W; W1 (upper surface) exposes the conductor part Wb for electrical connection; W2 (lower surface) has no conductor part and does not participate in electrical connection.

[0043] The first connector 11 is composed of: a first housing 21 made of insulating synthetic resin material, which houses and fixes the first terminal 22; a rectangular structure extending in the X direction; provided with a plurality of terminal cavities 21a for fixing the terminal. The first terminal 22 is connected to the terminal connection part 22a of the second terminal 24; the wiring connection part 22b is connected to the conductor part Wb of the wiring base W; the terminal 22 is a female terminal, i.e. a recessed type terminal, which is adapted to the male terminal of the second connector 12.

[0044] The first housing 21 further comprises: a fixing part 21b provided on both sides in the Y direction; a peg Peg 21c provided in the Z direction for assembly; a locking buckle 21d provided at one end in the Z direction for fixing the connection with the second connector 12.

[0045] The connection mode of the first terminal 22 with the wiring base W is:

[0046] (1) The first terminal 22 is connected to the wiring base W through the wiring connection part 22b;

[0047] (2) The first terminal 22 is inserted into the terminal cavity 21a of the first housing 21 and is fixed;

[0048] (3) The wiring base W is inserted into the first connector 11 from the X direction and is connected to the first terminal 22.

[0049] (4) The peg 21c in the Z direction is inserted into the fixing hole Wa of the wiring base W, realizing mechanical fixing;

[0050] (5) The wiring connecting part 22b of the first terminal 22 contacts the conductor part Wb of the wiring base W, realizing electrical connection.

[0051] The second connector 12 is composed of the following main parts: the second housing 23 made of insulating synthetic resin material, the second terminal 24, the second housing 23 material: square cylindrical structure extending along the X direction. The Z direction one end (such as Figure 2 the upper surface) is provided with a locking part 23a;

[0052] When the first connector 11 and the second connector 12 are connected, the locking part 23a of the second housing 23 will engage the locking buckle 21d of the first housing 21. The second terminal 24 male terminal, used for butt joint with the terminal connecting part 22a of the first terminal 22; the terminal connecting part 24a: used for electrical connection with the first terminal 22; the wiring connecting part 24b: the other end is used for electrical connection with the wire or PCB; the second terminal 24 is inserted into the second housing 23 and kept fixed, and its terminal connecting part 24a is exposed from the second housing 23, so as to connect the first terminal 22. Connection mode:

[0053] (1) The first connector 11 can be inserted into the second connector 12 from the other side (the left side) of the X direction; Figure 2

[0054] (2) The end part of the first connector 11 (including the locking buckle 21d) is embedded in the second housing 23, and is fixed by the locking part 23a of the second housing 23;

[0055] (3) The terminal connecting part 22a of the first terminal 22 is in electrical contact with the terminal connecting part 24a of the second terminal 24, realizing electrical connection.

[0056] The alignment plate 13 is made of insulating synthetic resin and the like, and is used to ensure the correct alignment of the terminals and prevent poor contact. It is installed and fixed to the first housing 21; it is provided with terminal receiving holes 31, and also provided with wiring connecting parts 22b for inserting the first terminal 22; the number of terminal receiving holes 31 corresponds to the number of first terminals 22; it is long strip shape (extending along the Y direction), which can ensure the correct arrangement of multiple terminals; there is uniform spacing between the terminal receiving holes 31, so as to ensure the alignment of the terminals.

[0057] ​The wiring connection part 22b of the first terminal 22 is composed of: a terminal body 41 extending along the surface (W1) of the wiring base W to the conductor part Wb; an extension part 42 extending from the terminal body 41 to a nearly vertical direction and keeping a certain distance from the wiring base W; and a bending part 43 between the terminal body 41 and the extension part 42, bending at an angle of about 90°, with its outer circumferential surface in contact with the conductor part Wb of the wiring base W.

[0058] The insertion of the terminal receiving hole 31 can ensure that the terminals 22 are arranged at a standard interval and avoid deviation; the precise positioning of the wiring connection part 22b of the first terminal 22 ensures that it correctly contacts the conductor part Wb of the wiring base W; the correction of the shape of the terminal prevents deviation caused by production tolerance; and the reliable contact between the terminal and the conductor part Wb improves the stability of the connection.

[0059] The installation of the alignment plate 13 is as follows:

[0060] (1) First, the alignment plate 13 is fixed to the first housing 21 through the installation slot and cooperates with the terminal receiving hole 31 to accurately align the terminals 22,

[0061] (2) The alignment plate 13 is inserted into the installation slot 51, 52 of the first housing 21 through the buckle wing part 32, 33;

[0062] (3) Slowly press the alignment plate 13 in the direction of the installation slot to finally completely fit in place;

[0063] (4) Ensure that the terminal wiring connection part 22b enters the terminal receiving hole 31 and is aligned and corrected.

[0064] The alignment plate 13 is in an elongated plate structure along the Y direction (width direction), and the terminal receiving hole 31 penetrates the Z direction (thickness direction); it is distributed at intervals along the Y direction and is adapted to the wiring connection part 22b of the plurality of first terminals 22; the buckle wing part 32, 33 is located at both ends of the Y direction and is formed by shortening the length in the X direction; specifically, the buckle wing part 32 is located on one side of the X direction, and the buckle wing part 33 is located on the other side.

[0065] The first outer casing 21 provides mounting slots for the alignment plate 13: mounting slots 51 and 52 are located on both sides in the Y direction; the upper side (top) in the Z direction is open, and the lower side (bottom) in the Z direction is closed by bottoms 51a and 52a; specifically, mounting slot 51 is located on one side in the X direction, and mounting slot 52 is located on the other side; the alignment plate 13 is fixed by inserting the snap-fit ​​wings 32 and 33 into the mounting slots 51 and 52, which are formed by groove structures; the inner wall is provided with multiple (three in this embodiment) retaining protrusions 53, 54, and 55; the retaining protrusions 53, 54, and 55 are located at the lower ends of the mounting slots 51 and 52; the protrusions are hemispherical and located at different positions; the snap-fit ​​wings 32 and 33 contact the protrusions 53, 54, and 55 to achieve XYZ three-way positioning:

[0066] Z direction: The buckle wings 32 and 33 contact the bottom 51a and 52a to secure them;

[0067] Y direction: The buckle wings 32 and 33 contact and hold the protrusion 53 for positioning;

[0068] X direction: The latching wings 32 and 33 contact and hold the protrusions 54 and 55 for positioning.

[0069] The alignment plate 13 serves the following functions for the terminals: the wiring connection portion 22b of the first terminal 22 is inserted into the terminal receiving hole 31; the extension portion 42 of the first terminal 22 is tapered (narrower at the beginning and wider at the end) for easy insertion; the inlet of the terminal receiving hole 31 has an enlarged diameter portion 34, which is conical, to facilitate smooth entry of the terminal. The installation process of the alignment plate 13 is as follows:

[0070] (1) The first terminal 22 is first fixed inside the first housing 21;

[0071] (2) The wiring substrate W is connected to the first housing 21;

[0072] (3) The alignment plate 13 is inserted into the mounting slots 51 and 52 through the snap-fit ​​wings 32 and 33;

[0073] (4) Slowly press down the alignment plate 13 along the direction of the mounting groove:

[0074] (5) The wiring connection part 22b of the first terminal 22 enters the terminal receiving hole 31;

[0075] (6) The extension 42 extends out of the terminal body 41 and is positioned along the terminal receiving hole 31;

[0076] (7) The bend 43 ensures stable contact of the conductor Wb.

[0077] In summary, the utility model provides a kind of high-precision, high-reliability electric connector structure, by the precise cooperation of alignment plate 13 and terminal receiving hole 31, realize the accurate guidance, shape correction and firm fixation of terminal in assembly process, effectively promote the insertion force control and long-term use stability of terminal.First, terminal adopts the combined design of terminal body 41, extension 42 and bending part 43, wherein extension 42 and terminal body 41 form nearly 90 ° angle, and insert terminal receiving hole 31, ensure the standard positioning of terminal, avoid the problem of electrical contact caused by assembly deviation.Second, to overcome the terminal insertion force variation caused by manufacturing tolerance, the utility model is provided with expansion section 34 at the entrance of terminal receiving hole 31, so that terminal extension 42 can enter smoothly with the guidance of expansion section 34 even if there is angle error during insertion, and then be limited by the physical shape of terminal receiving hole 31 during insertion process, automatically complete the shape correction and accurate alignment of terminal extension 42, ensure that the terminal connection part can stably contact the conductor part on the wiring, and ensure efficient and stable electrical connection.In addition, to further improve the physical contact reliability of terminal and wiring, the utility model adopts the cooperation design of alignment plate mounting groove and retaining protrusion, sets a pair of mounting grooves 51, 52 in the first housing, which are symmetrically distributed along Y direction, after the buckle wing part 32, 33 of alignment plate is inserted into the mounting groove, it is limited by retaining protrusion 53, 54, 5 to be accurately positioned in XYZ direction, to ensure that there is no looseness, misplacement or deformation of terminal caused by external force after assembly.At the same end of terminal receiving hole, terminal applies elastic pressure to wiring conductor part Wb through bending part 43, forms mechanical stable and long-term reliable electrical contact, prevents the problem of poor contact between terminal and wiring caused by external vibration, thermal expansion or mechanical stress during long-term use.In summary, the utility model improves the assembly accuracy, electrical connection stability, long-term use reliability and batch production consistency of terminal through terminal shape optimization, diameter expansion guide design, accurate positioning of alignment plate and mechanical stable support, is suitable for the design of high-density, small-size, high-reliability connector, especially suitable for the field of vehicle-mounted electronics, industrial control, medical equipment and consumer electronics requiring high-precision electrical connection.

[0078] The 3,5-dinitrobenzoyl chloride coating covering the inside or outer surface of the connector housing 21 can form a covalent bond with the surface of the substrate through its acyl chloride (-COCl) group, which can improve its adhesion to the housing 21. Meanwhile, the nitro groups (-NO2) at the 3,5-positions provide excellent oxidation resistance and chemical corrosion resistance, allowing the product to remain stable in high temperature (>300°C), strong acid and alkali environments, and extreme weather conditions, and have high hardness, wear resistance and ultraviolet aging resistance, making the product suitable for harsh application scenarios such as industry, aerospace and automotive electronics.

[0079] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An electrical connector, characterized by: An outer case having insulation; A terminal housed inside the outer case and connected to an end portion of a wiring base having conductivity; An alignment plate mounted to the outer case and having a terminal housing hole for inserting a front end portion of the terminal; The terminal includes a terminal body extending toward a conductor portion along a surface of the wiring base; An extension portion extending from the terminal body in a direction crossing the surface of the wiring base and away therefrom; the extension portion is inserted into the terminal housing hole of the alignment plate; The outer case is coated with a 3,5-dinitrobenzoyl chloride coating.

2. An electrical connector as claimed in claim 1, wherein: The terminal is provided with a bent portion between the terminal body and the extension portion, and the bent portion contacts the conductor portion of the wiring base.

3. An electrical connector as claimed in claim 1 or 2, wherein: The terminal housing hole is provided with an enlarged diameter portion at an entrance portion where the front end portion of the terminal is inserted.

4. An electrical connector as claimed in claim 1, wherein: The alignment plate has an elongated structure extending in a width direction of the outer case, each side portion in the width direction of the outer case is provided with a pair of mounting grooves extending in a direction crossing the surface of the wiring base, and each end portion in the long axis direction of the alignment plate is fitted into the pair of mounting grooves of the alignment plate.

5. An electrical connector as claimed in claim 4, wherein: The pair of mounting grooves is provided with a retaining protrusion for positioning each end portion in the long axis direction of the alignment plate.

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