CN101651263B - Wire-to-board connector - Google Patents

Abstract

The invention provides a wire-to-board connector, which includes several wire-end terminals and a plastic body. Each of the wire end terminals has at least one thin wire clip with slits, at least one protruding point portion extending outward, and a contact portion; the plastic body has opposite first and second surfaces, and the plastic body The first surface of the first surface is provided with several grooves for fixedly accommodating each of the wire end terminals, and at least one chute extending from the top surface to the bottom of each of the chute is provided on the side wall of each of the chute, between each of the chute The distance between them is equal to the distance between each of the protrusions, and each of the grooves has an opening at one end and a through hole at the other end. Each wire end terminal is riveted in each groove channel by aligning the protruding point portion of each wire end terminal on each of the slide slots and pressing down, and each contact portion passes through each through hole. The above structural design, no matter in the installation of the line terminal or the actual wiring operation, no special equipment is needed, the operation process is flexible, and the product is more miniaturized.

Description

Wire to Board Connector

technical field

The present invention relates to a wire-to-board connector, in particular to a connector that can easily complete the connection between the wire and the connector without special equipment or tools.

Background technique

Wire-to-board connectors are used in all kinds of civil mobile communication equipment and various personal terminal equipment (such as mobile phones, notebook computers, GPS, MP3/MP4, digital cameras, handheld game consoles, etc.), and are used to realize the internal functions of such equipment. The signal or power connection or transmission between the device and the main board finally completes the realization of the performance of the functional device. Such as the connection between the microphone in the mobile phone and the main board, the connection between the vibration motor and the main board, the connection between the cooling fan in the computer and the main board, the connection between the status indicator and the main board, the battery of the mobile phone (or MP3/MP4, etc.) board connections, etc. In general, a wire-to-board connector includes a pair of mutually matching parts, that is, a wire-end connector (connected with a wire and connected to a specific electronic device) and a board-end connector (usually soldered on the motherboard). Only connectors of the same type can be compatible with each other. The connection between the wire-end connector and the corresponding wire (that is, the wire). The conventionally designed wire-end connector includes several wire-end terminals and a plastic body for fixing the wire-end terminals. The wire-end terminals are arranged side by side and face the same The direction is inserted on the butt joint surface of the plastic main body, and is connected with the external circuit by means of the several wire end terminals. The general connection procedure is to connect the wire and the wire terminal with special equipment or tools in advance before the wire terminal is inserted into the plastic. As shown in Figure 1, it is the wire end terminal 9 of the existing wire end connector, which is a metal sheet with a wire groove, and a pair of front splints 91 and a pair of rear end splints 92 are arranged in sequence from the terminal. Shrapnel 93 on both sides, frame mouth 94. In actual use, first peel off the rubber on the head of the wire 7 with the help of special equipment to expose the metal wire 7' of an appropriate length, then place the stripped wire 7 in the wiring groove of the terminal, and then use a special clamp to The wire mechanism clamps the pair of front-end splints 91 and rear-end splints 92, so that the pair of rear-end splints 92 are used to compress the metal wire 7' exposed by stripping the rubber of the wire 7, and the rear-end splints are used to clamp the wire 7. rubber to prevent the wire rod 7 from coming off. Wherein, when the terminal of the wire end terminal 9 is connected to the wire 7, it is loaded into a row of holes at the rear of the wire end plastic body to form the wire end connector 9'; and the wire end connector 9' The matching board end connector 8' is generally a rectangular parallelepiped plastic body, and the plastic body is provided with a recess for receiving the wire end connector 9', and the wire end connector 9 is inserted into the board end connector. After the recesses are fitted, the board terminal 8 extends into the frame opening 94 of the head of the wire terminal 9 and contacts with the elastic piece 93 of the wire terminal 9. Since the distance between the elastic pieces 93 on both sides is slightly smaller than that of the board terminal 8 Diameter, therefore, the elastic piece 93 is in close contact with the board end terminal 8, so as to realize the electrical connection. The joint view of the wire-end connector 9' and the board-end connector 8 can clearly understand the connection state of the wire-end terminal 9 and the board-end terminal 8 from Figure 2, and at the same time, the structural characteristics of the traditional wire-to-board can be clearly understood.

The advantage of the above existing connector is that the wire end terminal 9 and the wire 7 are clamped by the front and rear splints 91, 92, and the rear splint 92 is clamped on the exposed wire 7', so that the structure is reliable and the contact area is large. The contact is good; the matching board end terminal 8 is a simple straight structure, generally in two specifications of 0.5X0.5mm and 0.64X0.64mm, the structure is simple and reliable, and the applicability is wide.

However, due to the complex structure of the wire terminal 9 of the above-mentioned connector, special equipment is required many times during the connection operation, the assembly process is long, and the efficiency is difficult to improve, and the wire 7 must be connected to the wire end terminal 9 during assembly. , so that it is not convenient and flexible enough for practical application, especially when replacing, and because several pairs of splint structures need to be designed, it is very difficult to further miniaturize the wire end terminals. For example, if the distance between each wire end terminal is made less than 1.25 mm, it is particularly difficult.

Contents of the invention

The object of the present invention is a wire-to-board connector, which has the advantages of simple structure, convenient wiring operation, and no special equipment or tools in the assembly process.

Another object of the present invention is to provide a wire-to-board connector, which has the advantages of simple and flexible assembly process, improved production efficiency, and further miniaturization of the overall volume of the connector.

In order to solve the above technical problems, the wire terminal connection of the present invention mainly includes several wire terminal terminals and a plastic body. Each of the wire end terminals is respectively provided with a terminal, a fixed part and a contact part at the end in sequence; the terminal is at least one thin wire clip with a slit, and the opening of the slit is upward; the fixed part is at least A protruding point extending outward; a plastic body with opposite first and second surfaces, the first surface of the plastic body is provided with several grooves for fixing and accommodating each of the wire end terminals, each of the grooves At least one chute extending from the top surface to the bottom of each channel is provided on the side wall of the channel, the distance between each chute is equal to the distance between each convex point, one end of each channel has an opening, and the other One end has a through hole; each of the wire-end terminals is clamped in each of the slide grooves by means of the protrusions of each of the wire-end terminals to be riveted in each of the grooves, and each of the contact parts passes through each of the through-holes.

The beneficial technical effects of the present invention are: when each of the wire-end terminals is installed on the plastic body, it is only necessary to press the convex part of each of the wire-end terminals to the chute on each groove and press vertically downward from above the plastic body When each wire end terminal reaches the bottom of the channel, the wire end terminals can be riveted and fixed. The present invention utilizes the space between the terminal and the length direction of the plastic to change the mating direction from the longitudinal direction to the vertical direction, thereby achieving reliable mating. When performing wiring operations, since the wire end terminal is provided with at least one thin wire with a slit Clamp, when the wire is forcibly pressed in from the slit, the insulating layer of the wire (that is, the rubber of the wire) is cut by the clamp of the terminal, and the clamp is in contact with the conductor part of the wire (that is, the core). Reliable connection, at the same time, because the upper part of the slit is empty, the rubber on the wire is not cut, that is, the rubber on the wire is still connected in essence, thereby preventing the possibility of the wire from falling off in the longitudinal direction . Therefore, the advantage of the present invention is:

1. This design method greatly facilitates the flexibility of customer use, and can make different products according to different requirements on the basis of the same wire-to-board connector.

2. There is no need for expensive and complicated special equipment in the connection operation.

3. The wire terminal is easy to install, and the riveting operation is simple, just press the terminal down into the plastic.

4. Utilize the space in the length direction of the terminal and the plastic to change the mating direction from the vertical direction to the vertical direction, making the overall size of the connector more miniaturized.

Description of drawings

FIG. 1 is a structure diagram of a wire-end terminal of an existing wire-to-board connector.

Fig. 2 is an exploded structure diagram of an existing wire-to-board connector.

Fig. 3 is a structural diagram of the wire-end terminal of the wire-to-board connector of the present invention.

Fig. 4 is a structural diagram of the plastic body of the wire-end connector of the present invention.

Fig. 5 is a schematic diagram of wiring of the wire-end connector of the present invention.

FIG. 6 is a schematic diagram of the second surface of the plastic body of the cable end connector of the present invention.

FIG. 7 is a schematic diagram of cooperation between the wire end connector and the board end connector of the present invention.

Description of symbols:

9’ wire end connector 9 wire end terminal 91 front splint 92 rear splint

93 shrapnel 94 frame mouth 8' board end connector 8 board end terminal

7 wire rod 7' metal 10 wire end connector 1 wire end terminal

2Plastic body 111 wire clip 112 slit 141 convex part

20 first surface 21 channel 211 opening 212 chute

22 perforations 5 wires 2111 Backstop structure 122 clip-type shrapnel

1221 narrow slot 20' second surface 24 guide groove 25 guide groove opening

40 board end connector 41 board end terminal contact area

Detailed ways

In order to make the structural features and advantages of the wire-to-board connector of the present invention more clearly understood, it will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 3 , the wire-to-board connector of the present invention includes a wire-end connector 10 composed of several wire-end terminals 1 and a plastic body 2 . Each wire terminal 1 has a terminal, a fixing portion and a contact portion respectively. The connection terminal is the part where the wire end terminal 1 and the wire form a reliable conductive connection. It is counted as a thin wire clamp 111. A slit 112 is formed in the middle of the wire clamp 111. The upper part of the slit 112 is an opening. The metal sheet of the plate 111 is very thin, and the distance between the thin slits 112 is very small. When the wire rod is pressed down from the top of the thin slit 112, the thin slit 112 can easily cut the rubber outside the wire rod, and the thin wire at the terminal There can be multiple pallets, and two are taken as an example in this embodiment. The fixing part is a part where each wire terminal 1 and the plastic body 2 form a firm combination, and it is designed as bumps 141 distributed on both sides of the wire terminal 1 . In this embodiment, the protruding point portion 141 is an arc-shaped protruding point formed by extending outward from the bottom plate of the wire terminal.

The plastic body 2 is formed into a plastic square as a whole, and has a first surface 20 and a second surface 20'. On the first surface 20, there are several grooves 21 for accommodating and fixing the wire terminals 1, each The width of the slots 21 is slightly equal to or smaller than that of the wire terminal 1 , and its length is greater than that of the wire end terminal 1 , and each slot 21 has an opening 211 for the wire to protrude from the opening. The sidewall of each channel 21 is provided with a plurality of slide grooves 212 from the top to the bottom of the channel 21 . The other end of the channel 21 is provided with a through hole 22 for the contact portion 12 of the wire end terminal 1 to be connected with the matching board end terminal through the through hole 22 . And the distance setting between each chute 212 corresponds to the distance setting between each bump portion 141 of the wire end terminal 1, and the width of the chute 212 is preferably just enough to accommodate each bump portion 141. A certain arc-shaped chamfer can be formed on the top of the groove 212, so that when the protruding point 141 is aligned and pressed down with force, the collision can be reduced and the operation is facilitated. When each of the wire-end terminals 1 is installed and fixed, the end of the terminal 11 faces the opening 211 of the channel 21, and the convex part 141 of each terminal is aligned with the sliding groove 212 on the plastic body 2, and the front of the channel 21 upwards, press downwards firmly, each convex point 141 slides to the bottom of the channel 21 along the sliding groove 212, and is stuck in the sliding groove 212, so that the entire wire end terminal 1 is fixed.

Please refer to FIG. 4 , with the help of the above, the wire end connector 10 of the present invention is formed after combining each wire end terminal 1 with the plastic body 2 . In the actual connection operation, after the wire 5 is forced into the slit 112 from the top of the wire clip 111, the insulating layer (that is, the rubber of the wire) on the outside of the wire 5 is cut by the slit 112, and the wire clip 111 and the The conductor part of the wire (that is, the core) contacts to achieve a reliable connection. Simultaneously, because the upper part of the slit 112 on the wire clamping plate 111 is empty, the upper rubber of the wire here is not cut, that is, the rubber is still partially connected, thereby preventing the possibility of the wire from falling off in the longitudinal direction.

Wherein, the number of wire clips 111 can be set according to actual needs. For example, only one clip is provided to further reduce the length of the wire terminal 1 itself, or three clips are provided to further increase the firmness of the wire connection, sometimes in order to adapt to the electrical connection, it is necessary to transmit a large current, It is also possible to appropriately add a clamping board to increase the contact surface between the wire end terminal 1 and the wire core.

The number and geometric shape of the bump portion 141 can also be set as required, such as a plurality of square bumps or a plurality of triangular bumps, etc., and the number and cross-sectional shape of the chute 212 on the plastic body can also be adjusted according to the needs of the bumps. The part 141 is provided correspondingly, and the setting position of the bump part 141 is not limited to the outside of the bottom plate of the wire end terminal 1, and can also be arranged on other parts of the wire end terminal 1, for example, the bump part 141 can also be arranged on The outside of the wire clip board. It is also possible to make the outer width of a wire clamping plate 111 slightly larger than the width of the groove 21, and simultaneously also offer several slide grooves for accommodating these wire clamping plates 111 on the side wall of the groove 21, further Restrain and fix each wire end terminal 1.

Further, an anti-retraction structure 2111 can be provided at the opening 211 of the plastic body 2. In this embodiment, the anti-retreat structure 2111 is a protrusion disposed on both side walls and close to the top surface, so as to prevent the wire from The vertical direction falls off to further ensure the reliable connection with the wire 5 and the wire end terminal 1. In addition, the backstop structure 2111 can also be formed by gradually reducing the width of the opening 211 from bottom to top.

The contact portions of the above-mentioned wire end terminals 1 are the parts that form a reliable conduction connection with the board end terminals through the through holes 22 of the plastic body. The structure of the contact part of the wire end terminal can adopt various structures in the prior art, for example, the structure of the elastic pieces on both sides and the frame opening in the background art can be adopted.

Please refer to Fig. 3 again, in order to further simplify the structure of the existing connector and further miniaturize the purpose of the present invention, the contact portion of each wire end terminal 1 of the wire end connector 10 of the present invention is specially designed as a pair of The clip-type elastic piece 122 with a certain narrow slit 1221 has a certain flare angle at the upper end of the clip-type elastic piece 122, so as to facilitate the introduction of the board end terminal used in conjunction with it. The clip-shaped elastic piece 122 is vertically bent in the direction opposite to the wire clamping plate 111 , so that the upper end of the clip-shaped elastic piece 122 and the upper end of the wire clamping plate 111 form a larger vertical distance.

Please refer to FIG. 6 and FIG. 7, the clip-type elastic piece 122 passes through the perforation 22 of the plastic body 2, and reaches the second surface 20' of the plastic body 2, and several guides are arranged on the second surface 20' of the plastic body 2. Slots 24, each guide groove passes through the center of the exposed clip-type elastic piece 122, and is slightly wider than the narrow slit 1221, and extends a certain distance to both ends, so that one side of the guide groove 24 faces away from the wire terminal terminal 11 The side has an opening 25 . The board-end terminal contact area 41 of the board-end connector 40 used in conjunction with the wire-end connector 10 of the present invention is designed as a long straight flat needle, and its head is designed with a certain chamfer, and its function is similar to that of the clip-type elastic piece 122. The flaring angle is the same, which is convenient for the two to cooperate with each other without collision or interference. The thickness of the board terminal contact area 41 is slightly wider than the narrow gap 1221 between the clip-shaped elastic pieces 122 . When cooperating with the clip-type elastic piece 122, the board-end terminal contact area 41 extends into the slit 1221 between the clip-type elastic pieces 122 through the opening 25. Because the thickness of the board-end terminal contact area 41 is greater than the width of the narrow slit 1221, the clip The type elastic piece 122 is pushed outward, and at the same time, a clamping force (positive force) is generated on the contact area 41 of the board end terminal, thereby realizing a reliable connection.

Since the plastic body of the wire-end connector 10 of the present invention is roughly square as a whole, and on the end face for the connection of the board-end connector 40, each clip-shaped elastic piece 122 penetrates the second surface 20' of the plastic body 2, therefore, the board The board terminal contact area 41 of the terminal connector 40 must be correspondingly located on one side of the end surface of the board connector 40 off-centre so that it can be inserted into the narrow slit 1221 between the clip-type elastic pieces 122 through each opening 25 to realize Electrical connection to the end connector 10. Therefore, when the board end connector 40 is mated with the wire end connector 10, it plays the role of positioning and foolproofing.

The advantages of the above design are:

The same connection effect as the conventional design (larger size connector) can be achieved under the condition of smaller size, and the reliability of conduction is high; since the size of the wire end and the board end terminal are smaller than that of the conventional connector, Therefore, its contact resistance is also small, which is beneficial for products with stricter loss requirements.

Claims (9)

1. A wire-to-board connector, characterized in that it comprises: A plurality of wire-end terminals, each of which is respectively provided with a terminal, a fixing portion and a contact portion at the end in sequence; The terminal is at least one thin wire clip with a slit, and the opening of the slit is upward; The fixing part is at least one protruding point extending outward; A plastic body has opposite first surface and second surface, the first surface of the plastic body is provided with several grooves for fixing and accommodating each of the wire end terminals, each of the groove side walls is provided with at least one from The top surface is a chute extending from the bottom of each channel, and the distance between each chute is equal to the distance between each of the convex points; one end of each channel has an opening, and the other end has a through hole; Each of the wire-end terminals is clamped in each of the slide grooves by means of the protrusions of each of the wire-end terminals to be riveted and fixed in each of the grooves, and each of the contact portions passes through each of the through holes. 2. The wire-to-board connector according to claim 1, wherein there are two wire clamping boards. 3. The wire-to-board connector according to claim 1, wherein the outer width of the wire clamping board is larger than the width of each of the channels, and each of the channel side walls is additionally provided for accommodating the The chute for each wire clip. 4. The wire-to-board connector as claimed in claim 1, wherein the protruding points are distributed on two sides of each of the wire-end terminals. 5. The wire-to-board connector according to claim 1, wherein the opening of each channel is provided with a backstop structure, each of the stopper structures is a protrusion provided on the side wall of each channel Or an opening whose width decreases from bottom to top. 6 . The wire-to-board connector according to claim 1 , wherein each of the contact portions is a pair of clip-shaped elastic pieces, and the top ends of each of the pair of clip-shaped elastic pieces form an opening angle. 7 . The wire-to-board connector according to claim 6 , wherein each of the clip-type elastic pieces is formed by extending the wire-end terminal in an opposite direction along the wire clamping board. 8 . the 8. The wire-to-board connector according to claim 6 or 7, wherein each pair of The clip-type elastic piece runs through the second surface of the plastic body. 9. The wire-to-board connector according to claim 6 or 7, wherein the contact area of the board terminal used in conjunction with the wire terminal is in the shape of a long straight flat pin with a chamfered end. the

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