CN101662089A - Board to board electric connector - Google Patents

Abstract

The invention provides a board to board electric connector. A socket comprises a socket body and a plurality of socket terminals, wherein each socket terminal is provided with a base part which upwards extends a holding part; one end of each base part extends a first welded part; a plug comprises a plug body and a plurality of plug terminals; the plug body is provided with a plurality of plug terminal slots for accommodating the plug terminals; each plug terminal is provided with a second welded part and a second contact part; the other end of each base part extends a first elastic arm which extends a first contact part; each holding part extends a second elastic arm connected with the corresponding first contact part; and each first elastic arm, the corresponding second elastic arm, the corresponding first contact part and the corresponding holding part form an elastic space. The board to board electric connector provided by the invention can effectively improve the normal force and reduce the contact resistance, and compared with the board to board electric connector with a single elastic arm in the prior art, is more difficult to damage after being plugged and unplugged for a plurality of times.

Description

A board-to-board electrical connector

technical field

The invention relates to an electrical connector, in particular to an electrical connector for connecting two circuit boards.

Background technique

At present, with the rapid development of various electronic products, the requirements for thinner and lighter are getting higher and higher, and the application of printed circuit boards is becoming more and more common. The board-to-board electrical connector is used to realize the electrical connection of two printed circuit boards. The board-to-board electrical connector is very small, but because it is related to the circuit connection in electronic products, it plays a pivotal role, so the stability of its electrical contact, resistance to plugging and contact resistance are all measures of the board-to-board electrical connector. Bad important parameters.

In the prior art, there is a board-to-board electrical connector as shown in FIG. 8 , which includes a plug 02 and a socket 01 . The plug 02 includes an insulated plug body 020 and a plug terminal 021, the plug terminal 021 is connected to a circuit board through the welding part 022 on it; Connect to another circuit board. Through the locking structure between the elastic arm 023 of the plug terminal and the end of the elastic arm 013 of the socket terminal, in this prior art, an elastic arm 013 is extended from the socket terminal 011, and a hook-shaped contact 014 is arranged on the elastic arm. Through the hook-shaped contact The head 014 and the elastic arm 023 of the plug terminal are interlocked to lock the plug and the socket, so as to realize the combination between the plug and the socket, and achieve the function of connecting the two circuit boards for signal transmission.

However, due to the use of the single elastic arm in the prior art, the main elastic deformation lies in the elastic arm 013 of the socket terminal. The positive force provided by the single elastic arm is limited, and the so-called positive force is the contact point between the plug terminal and the socket terminal. In the actual use process, too small positive force will lead to poor contact, and the overall strength of the single-arm structure is not satisfactory after long-term plugging and unplugging. In addition, due to the electrical conductivity of the single arm The conductivity is not good enough and the impedance is high. It can be seen that the existing board-to-board electrical connectors still need to be improved.

Contents of the invention

The object of the present invention is to provide a board-to-board electrical connector with small resistance and sufficient positive force.

A board-to-board electrical connector, including a socket and a plug, wherein the socket includes a socket body 100 and several socket terminals 1, the socket body 100 has several socket terminal grooves 101 for accommodating the socket terminals 1, the socket The terminal 1 has a base portion 10, the base portion 10 extends upwards from a holding portion 15, and one end of the base portion 10 extends from a first welding portion 11. The plug includes a plug body 200 and several plug terminals 2, and the plug body 200 has several A plug terminal slot 201 for accommodating a plug terminal 2, the plug terminal has a second welding portion 21 and a second contact portion 24, the other end of the base 10 extends from a first elastic arm 12, and the first elastic arm 12 extends upward Out of the first contact portion 14, the holding portion 15 extends a second elastic arm 13 to connect with the first contact portion 14, the first elastic arm 12, the second elastic arm 13, the first contact portion 14 and the holding portion 15 The elastic space 17 is formed, and the first contact portion 14 and/or the second contact portion 24 has a buckle structure, so that the first contact portion 14 elastically deforms and makes electrical contact with the second contact portion 24 after the plug is inserted into the socket.

A board-to-board electrical connector socket, comprising several socket terminals 1 and a socket body 2, the socket body 2 has several socket terminal slots 101 for accommodating the socket terminals 1, the socket terminal 1 has a base 10, the A holding portion 15 extends upward from the base, a first welding portion 11 extends from one end of the base 10, a first elastic arm 12 extends from the other end of the base 10, and a first contact portion 14 extends upward from the first elastic arm 12, so The holding portion 15 extends a second elastic arm 13 connected to the first contact portion 14 , and the first elastic arm 12 , the second elastic arm 13 , the first contact portion 14 and the holding portion 15 form an elastic space 17 .

A socket terminal 1 for a board-to-board electrical connector, having a base 10, the base 10 extends upwards to a holding portion 15, one end of the base 10 extends a first welding portion 11, and the other end of the base 10 extends a first elastic Arm 12, the first elastic arm 12 extends upwards out of the first contact portion 14, the holding portion 15 extends out of the second elastic arm 13, and is connected with the first contact portion 14, the first elastic arm 12, the second elastic arm 13. The first contact portion 14 and the holding portion 15 form an elastic space 17 .

The board-to-board electrical connector provided by the invention can effectively increase the positive force and reduce the impedance, and is more difficult to be damaged than the single elastic arm in the prior art after repeated plugging and unplugging.

Description of drawings

Figure 1 is an overall assembly diagram of an embodiment of the board-to-board electrical connector of the present invention

Figure 2 is an exploded view of an embodiment of the board-to-board electrical connector of the present invention

Figure 3 is a cross-sectional view of an embodiment of the board-to-board electrical connector of the present invention

Fig. 4 is a perspective view of an embodiment of the socket terminal of the board-to-board electrical connector of the present invention

Fig. 5 is a perspective view of an embodiment of a socket terminal and a plug terminal of the present invention

Fig. 6 is a schematic diagram of Embodiment 1 of the socket terminal and the plug terminal of the present invention

Fig. 7 is a schematic diagram of the second embodiment of the socket terminal and the plug terminal of the present invention

Figure 8 is a cross-sectional view of a prior art board-to-board electrical connector

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to demonstrate the advantages of the present invention.

As shown in Fig. 1 to Fig. 3, the board-to-board electrical connector socket and plug of the embodiment of the present invention, the socket includes a socket body 100, which is made of insulating material, and also includes several socket terminals 1, and the socket terminals 1 pass through The socket terminal groove 101 is arranged in the socket body 100, and the socket also has a receiving space 102 for accommodating a plug; the plug includes a plug body 200 also made of insulating material, and also includes a plug terminal 2, and the plug terminal 2 passes through The plug terminal groove 201 is disposed in the plug body 200, and the plug terminal 2 can be electrically connected with the socket terminal when the plug is inserted into the socket. The socket is electrically connected to a circuit board through the first welding part on the socket terminal 1, and the plug is electrically connected to another circuit board through the second welding part on the plug terminal 2. After the plug is inserted into the socket, the plug terminal 2 and the The socket terminal 1 is directly electrically connected, thereby realizing the electrical connection between the two circuit boards. The plug terminal 2 and the socket terminal 1 will be described in detail below.

As shown in FIG. 4 , the socket terminal 1 of the embodiment of the present invention includes a base 10 , and the base 10 extends upwards from a holding portion 15 . One end of the base 10 extends from a first welding portion 11 , and the other end extends from a first elastic arm 12 . The first elastic arm 12 extends upwards out of the first contact portion 14, and the holding portion 15 extends out of the second elastic arm 13 to connect with the first contact portion 14. The first elastic arm 12, the second elastic arm 13, the first The contact portion 14 and the holding portion 15 form an elastic space 17 , and the elastic space 17 makes the first contact portion 14 , the second elastic arm 13 and the first elastic arm 12 have a deformation space when elastically deformed. At the same time, according to the resistance calculation formula: R=p*l/s (p-resistivity; l-resistance length; s-resistance cross-sectional area perpendicular to the current), it is known from the formula that the resistivity is inversely proportional to the cross-sectional area, which is inversely proportional to the current Compared with the prior art, in the structure of the embodiment of the present invention, the current flows along the two directions of the first elastic arm and the second elastic arm at the same time. When the material thickness and external dimensions are constant, the average of the double elastic arm structure The cross-sectional area is maximized and thus a lower impedance is obtained. This conforms to the general connector requirement that the smaller the contact resistance, the more favorable it is.

As shown in Figures 4 to 7, the plug terminal 2 matched with the socket terminal of the embodiment of the present invention can adopt a strip structure as in 4, or a sheet structure as shown in Figures 5 to 7, all of which have a second The welding part 21 and the second contact part 24 . The socket terminal 1 and the plug terminal 2 are electrically connected through the buckle structure provided on the first contact portion 14 and/or the second contact portion 24 . The buckle structure makes the first contact part 14 produce elastic deformation and snap fit with the second contact part 24 . In the present invention, the force perpendicular to the contact surface between the socket terminal 1 and the plug terminal 2 is called a positive force. The normal force is a key parameter for evaluating the contact reliability, and the double-arm structure of the embodiment of the present invention can make the normal force larger than that of the prior art, so that the contact of the connector terminals is more reliable. Taking a socket terminal with a height of 0.95mm and a material thickness of 0.12 as an example, the positive force of the single elastic arm is 50g-100g, while the positive force of the double elastic arm can reach more than 150g, and its positive force has been significantly improved. .

In order to make the combination of the two terminals stronger, the preferred buckle structure includes a protrusion 14 ′ arranged on the first contact portion 14 , and more preferably the buckle structure also includes a protrusion 14 ′ arranged on the second contact portion 24 to be compatible with The protrusion 14' contacts the mating arcuate surface 24'.

Embodiment 1: As shown in FIG. 6 , the buckle structure includes a protrusion 14 ′ provided on the first contact portion 14 , and also includes a protrusion 14 ′ disposed on the second contact portion 24 that can contact and cooperate with the protrusion 14 ′. The arc surface 24', in the process of inserting the plug into the socket, due to the structure of the protrusion 14' and the arc surface 24', the plug terminal 1 is first subjected to a relatively large force, the first elastic arm 12 and the second elastic arm 13 and The first contact portion 14 produces a large deformation, and when the protrusion 14 ′ fully fits with the arc surface 24 ′, the deformation becomes small so that the plug terminal 2 and the receptacle terminal 1 are buckled together stably.

Another improvement is that the buckle structure includes a protrusion 24" provided on the second contact part 24, and more preferably the buckle structure also includes a protrusion 24" arranged on the first contact part that can contact the second The protrusion 24" of the portion 24 contacts the mating arcuate surface 14".

Embodiment 2: As shown in FIG. 7 , the buckle structure includes a protrusion 24 ″ provided on the second contact part 24 , and also includes a protrusion 24 ″ provided on the first contact part that can protrude with the second contact part 24 24" is in contact with the arc-shaped surface 14", the principle of which is similar to that described in Embodiment 1 and will not be repeated here.

As shown in FIGS. 4 to 6 , preferably, the holding portion 15 further has a fixing portion 16 , and the fixing portion 16 can interfere with the socket terminal groove 101 . The purpose of such setting is to make the second contact portion 24 of the plug terminal 2 repeatedly squeeze and rub against the first contact portion 14 of the socket terminal 1 during the process of plugging and unplugging the plug, so that the socket terminal 1 will not be held. The part 15 produces deflection or displacement for the axis, so that the board-to-board electrical connector in the present invention is more stable than the existing board-to-board electrical connector, and the socket terminal 1 is more stable, thereby improving the distance between the plug terminal 2 and the socket terminal 1. The stability of the electrical connection. The fixing portion 16 can be a tear-like bulge or a protruding round bag or a protrusion of other shapes, as long as it can interfere with the socket terminal groove wall, any structure can be used.

The above are only specific implementation methods and examples of the present invention, and are not used to limit the protection scope of the present invention. All modifications and equivalent changes made under the concept of the present invention should be regarded as within the protection scope of the present invention Inside.

Claims (14)

1. A board-to-board electrical connector, comprising a socket and a plug, wherein the socket includes a socket body (100) and several socket terminals (1), and the socket body (100) has several socket terminals (1) ), the socket terminal (1) has a base (10), the base (10) extends upwards from the holding portion (15), and one end of the base (10) extends from the first welding portion (11), the plug includes a plug body (200) and several plug terminals (2), the plug body (200) has several plug terminal grooves (201) for accommodating the plug terminals (2), the plug terminals It has a second welding part (21) and a second contact part (24), and is characterized in that the other end of the base (10) extends out of the first elastic arm (12), and the first elastic arm (12) extends upward out of the first The contact part (14), the second elastic arm (13) extending from the holding part (15) is connected with the first contact part (14), the first elastic arm (12), the second elastic arm (13), The first contact part (14) and the holding part (15) form an elastic space (17), and the first contact part (14) and/or the second contact part (24) has a buckle structure, so that when the plug is inserted into the socket The rear first contact portion (14) produces elastic deformation and is in electrical contact with the second contact portion (24). 2. The board-to-board electrical connector according to claim 1, characterized in that the buckle structure comprises a protrusion (14') provided on the first contact portion (14). 3. The board-to-board electrical connector according to claim 2, characterized in that the buckle structure further includes an arc arranged on the second contact portion (24) that can contact and cooperate with the protrusion (14') Shaped surface (24'). 4. The board-to-board electrical connector according to claim 1, characterized in that the buckle structure includes a protrusion (24") provided on the second contact portion (24), 5. The board-to-board electrical connector according to claim 4, characterized in that the buckle structure further includes a protrusion (24") arranged on the first contact part that can be connected to the second contact part (24) Contact mating curved face (14”). 6. The board-to-board electrical connector according to any one of claims 1 to 5, characterized in that the holding part (15) has a fixing part (16), and the fixing part (16) can be connected to the socket terminal groove (101) Interference fit. 7. A board-to-board electrical connector socket, comprising several socket terminals (1) and a socket body (2), the socket body (2) having several socket terminal grooves (101) for accommodating the socket terminals (1) , the socket terminal (1) has a base (10), the base extends upwards from a holding portion (15), and one end of the base (10) extends from a first welding portion (11), characterized in that the base ( 10) The other end extends a first elastic arm (12), the first elastic arm (12) extends upwards to a first contact portion (14), and the holding portion (15) extends a second elastic arm (13) and a second elastic arm (13). A contact part (14) is connected, and the first elastic arm (12), the second elastic arm (13), the first contact part (14) and the holding part (15) form an elastic space (17). 8. The board-to-board electrical connector socket according to claim 7, characterized in that the first contact portion (14) has a protrusion (14'). 9. The board-to-board electrical connector socket according to claim 7, characterized in that the first contact portion (14) has an arc-shaped surface (14"). 10. The board-to-board electrical connector socket according to any one of claims 7 to 9, characterized in that the holding part (15) has a fixing part (16), and the fixing part (16) can be connected to the socket terminal The groove (101) is an interference fit. 11. A socket terminal (1) for a board-to-board electrical connector, having a base (10), the base (10) extends upwards from a holding portion (15), and one end of the base (10) extends from a first welding portion (11) , characterized in that the other end of the base (10) extends a first elastic arm (12), the first elastic arm (12) extends upwards to a first contact portion (14), and the holding portion (15) extends a second Two elastic arms (13), connected to the first contact portion (14), the first elastic arm (12), the second elastic arm (13), the first contact portion (14) and the holding portion (15) form an elastic space (17). 12. The board-to-board electrical connector socket terminal according to claim 11, characterized in that the first contact portion (14) has a protrusion (14'). 13. The board-to-board electrical connector socket terminal according to claim 11, characterized in that the first contact portion (14) has an arc-shaped surface (14"). 14. The board-to-board electrical connector socket terminal according to any one of claims 12 and 13, characterized in that the holding part (15) has a fixing part (16), and the fixing part (16) can be connected to the socket The terminal slot (101) is an interference fit.

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