CN115732967A - Solder-free electrical connector - Google Patents

Abstract

The invention discloses a welding-free electrical connector, which comprises an upper insulating body, a lower insulating body and terminals fixedly stacked from top to bottom. The upper insulating body is provided with at least one upper terminal whose upper opening size is smaller than the lower opening size Slot, the lower insulating body is provided with at least one lower terminal receiving groove whose upper opening size is larger than the lower terminal opening size, the upper terminal receiving groove and the lower terminal receiving groove are facing one by one, and the terminals can be fixedly accommodated in the upper terminal receiving groove and the lower terminal receiving groove In the cavity space formed by the grooves together, the terminal is provided with an upper elastic contact part and a lower elastic contact part that can elastically expand and contract in the up and down direction, and the upper elastic contact part and the lower elastic contact part can pass through the upper end opening of the upper terminal receiving groove respectively. The opening of the lower end of the receiving groove of the lower terminal protrudes to the outside of the upper end of the upper insulating body and the outer side of the lower end of the lower insulating body. The invention is convenient to assemble, avoids welding on the circuit board, reduces the assembly cost of the circuit board, and facilitates replacement and maintenance of damaged connectors. .

Description

Solder-free electrical connector

technical field

The invention relates to a connector, in particular to a welding-free electrical connector.

Background technique

Connectors are used to realize the electrical connection and signal transmission of two conductive parts. Electronic products assembled on circuit boards need to use connectors for electrical connection. At present, welding is used to weld the connectors on the circuit board, and then Install electronic parts, such as chips, etc. on the connector by plugging in or pressing the auxiliary bracket, and use the connector to realize that the electronic parts (such as chips) can be disassembled from the circuit board , to achieve maintenance and electronic product upgrades. However, the connector is welded on the circuit board. On the one hand, the circuit board needs to be welded during assembly, and the process is complicated. It is also prone to poor welding and other situations that affect the signal transmission between the connector and the circuit board. Soldering materials will also cause a certain degree of pollution to the environment and affect the production efficiency of circuit board assembly. At the same time, since the connector is welded on the circuit board, once the connector is damaged, the circuit board will be scrapped and the connector cannot be replaced. At the same time, during the updating process of electronic parts (such as chips), the contact points must be the same as the connectors soldered on the circuit board, so there are often mismatches between the connectors on the circuit board and the updated electronic parts (such as chips). The situation hinders the replacement and upgrading of electronic products, and the entire circuit board needs to be scrapped, resulting in energy loss and environmental pollution.

Contents of the invention

In order to make up for the above deficiencies, the present invention provides a solder-free electrical connector. The solder-free electrical connector avoids being connected to the circuit board by soldering, and realizes the positioning of the connector and the connection of the circuit when the chip module is assembled with the circuit board. conduction, which is convenient for circuit board maintenance and upgrade.

The technical solution adopted by the present invention in order to solve the technical problem is: a welding-free electrical connector, including an upper insulating body, a lower insulating body and terminals, and the upper insulating body and the lower insulating body can be fixedly stacked from top to bottom. Assuming the formed structure, the upper insulating body is provided with at least one upper terminal receiving groove whose upper opening size is smaller than the lower opening size, and the lower insulating body is provided with at least one lower terminal receiving groove whose upper opening size is larger than the lower opening size, so The above-mentioned upper terminal accommodating groove and the lower terminal accommodating groove are arranged opposite to each other, and the terminals can be fixedly accommodated in the cavity space jointly formed by the upper terminal accommodating groove and the lower terminal accommodating groove. The upper elastic contact part and the lower elastic contact part are movable, and the upper elastic contact part and the lower elastic contact part can protrude to the outer side of the upper end of the upper insulating body through the upper end opening of the upper terminal receiving groove and the lower end opening of the lower terminal receiving groove respectively. The outer side of the lower end of the lower insulating body.

As a further improvement of the present invention, at least two connection positioning holes are provided on the upper insulating body, and at least two connection positioning posts are provided on the lower insulating body, and the connection positioning posts can be fixedly inserted into the connection positions one by one. in the positioning hole.

As a further improvement of the present invention, the upper insulating body is provided with at least two connection positioning posts, and the lower insulating body is provided with at least two connection positioning holes, and the connection positioning posts can be fixedly inserted into the connecting posts one by one. in the positioning hole.

As a further improvement of the present invention, the connection positioning post and the connection positioning hole are fixed and positioned by means of interference fit, hot melt connection, buckle connection or connector connection.

As a further improvement of the present invention, the terminal includes an upper elastic arm and a lower elastic arm, and one end of the upper elastic arm and the lower elastic arm are respectively stopped by the inner wall of the cavity space jointly formed by the upper terminal opening groove and the lower terminal opening groove. Positioning, the other ends of the upper elastic arm and the lower elastic arm form an elastic cantilever structure, and the upper elastic contact part and the lower elastic contact part are respectively a V-shaped bending structure formed by bending the upper elastic arm and the lower elastic arm. The opening of the curved structure faces the inner direction of the cavity space jointly formed by the upper terminal opening groove and the lower terminal opening groove, and the two ends of the upper elastic arm and the lower elastic arm stop respectively on the inner side walls of the upper terminal opening groove and the lower terminal opening groove.

As a further improvement of the present invention, the upper terminal accommodating groove is formed with a left limiting surface of the upper terminal accommodating groove, an upper limiting surface of the upper terminal accommodating groove and a right limiting surface of the upper terminal accommodating groove, and a lower terminal accommodating groove is formed in the lower terminal accommodating groove. The left limiting surface of the terminal receiving groove, the lower limiting surface of the lower terminal receiving groove and the right limiting surface of the lower terminal receiving groove, the upper limiting surface of the upper terminal receiving groove is an inclined surface gradually inclined upward from left to right, The right limiting surface is an inclined surface gradually inclined downward from left to right, the lower limiting surface of the lower terminal receiving groove is an inclined surface gradually inclined downward from left to right, and the right limiting surface of the lower terminal receiving groove is in line with The inclined surface gradually inclines upward from left to right, the left end of the upper elastic arm is close to the left limiting surface of the upper terminal receiving groove, the upper elastic arm extends upwardly along the upper limit surface of the upper terminal receiving groove, and the free end of the upper elastic arm is along The right limiting surface of the upper terminal receiving groove extends obliquely downwards, the left end of the lower elastic arm closely touches the left limiting surface of the lower terminal receiving groove, the lower elastic arm extends obliquely downward along the lower limiting surface of the lower terminal receiving groove, and the lower elastic arm The free end extends obliquely upward along the right limiting surface of the lower terminal receiving groove.

As a further improvement of the present invention, the ends of the free ends of the upper elastic arm and the lower elastic arm are respectively formed with bending structures facing the inner direction of the cavity space.

As a further improvement of the present invention, the terminal also includes a base extending in the up and down direction, the base is close to the left limiting surface of the upper terminal receiving groove and the left limiting surface of the lower terminal receiving groove, the upper elastic arm and the lower elastic arm It is formed by bending and extending from the upper end and the lower end of the base respectively.

As a further improvement of the present invention, the width of the base is larger than the width of the upper elastic arm and the lower elastic arm, and the base is tightly sandwiched between the two side walls of the upper terminal receiving groove and the lower terminal receiving groove along the terminal width direction, The gap between the upper elastic arm and the lower elastic arm and the inner side walls in the width direction of the upper terminal accommodating groove and the lower terminal accommodating groove gradually increases from the root to the free end direction.

As a further improvement of the present invention, the upper terminal accommodating grooves and the lower terminal accommodating grooves on the upper insulating body and the lower insulating body are respectively arranged in an array state and evenly spaced.

The beneficial technical effects of the present invention are: the present invention respectively forms an upper terminal receiving groove and a lower terminal receiving groove on the upper insulating body and the lower insulating body, and the terminals are fixedly positioned in the cavity jointly formed by the upper terminal receiving groove and the lower terminal receiving groove In the space, the upper elastic contact part and the lower elastic contact part on the terminal protrude to the outside of the upper insulating body and the lower insulating body through the openings of the upper terminal receiving groove and the lower terminal receiving groove respectively, and are used for electrical connection with the chip module and the circuit board. sexual contact, so that the chip module, the conductive terminal and the circuit board form a conductive path. The connector of the present invention does not need to be welded on the circuit board. When the chip component and the circuit board are assembled through the connector, the connector is clamped on the circuit board. Between the board and the chip module, the conductive terminals on the connector are respectively in elastic contact with the chip module and the circuit board, so as to realize the effective transmission of electrical signals, facilitate assembly, avoid welding process, and reduce the cost of circuit board assembly. If the connector is damaged, it is easy to replace and repair, and it is also convenient to upgrade the chip module on the circuit board, realize the full utilization of the circuit board, reduce the scrap rate of the circuit board, and save energy.

Description of drawings

Fig. 1 is the perspective view of the use state of the present invention;

Fig. 2 is an exploded diagram of the use state of the present invention;

Fig. 3 is an exploded view of the present invention;

Fig. 4 is a perspective view of the present invention;

Fig. 5 is A-A to sectional view among Fig. 4;

Fig. 6 is an enlarged view of part B in Fig. 5;

Fig. 7 is a schematic diagram of the deformed state of the conductive terminal of the present invention during the assembly process;

Fig. 8 is a first perspective view of the upper insulating body of the present invention;

Fig. 9 is a second perspective view of the upper insulating body of the present invention;

Fig. 10 is a C-C sectional view in Fig. 9;

Fig. 11 is a first perspective view of the lower insulating body of the present invention;

Fig. 12 is a second perspective view of the lower insulating body of the present invention;

Fig. 13 is a D-D cross-sectional view in Fig. 12;

Fig. 14 is a perspective view of a terminal of the present invention.

Detailed ways

Embodiment: a welding-free electrical connector, including an upper insulating body 11, a lower insulating body 12 and a terminal 13, the upper insulating body 11 and the lower insulating body 12 can be fixedly stacked from top to bottom to form a structure, so The upper insulating body 11 is provided with at least one upper terminal receiving groove 111 whose upper opening is smaller than the lower opening, and the lower insulating body 12 is provided with at least one lower terminal receiving groove 121 whose upper opening is larger than the lower opening. The terminal accommodating groove 111 and the lower terminal accommodating groove 121 are arranged opposite one by one, and the terminal 13 can be fixedly accommodated in the cavity space jointly formed by the upper terminal accommodating groove 111 and the lower terminal accommodating groove 121. The upper elastic contact part 134 and the lower elastic contact part 135 elastically expand and contract in the up and down direction. The opening protrudes to the outer side of the upper end of the upper insulating body 11 and the outer side of the lower end of the lower insulating body 12 .

After the terminal 13 made of conductive material is assembled in the cavity space formed by the upper terminal receiving groove 111 of the upper insulating body 11 and the lower terminal receiving groove 121 of the lower insulating body 12, the upper elastic contact part 134 and the lower elastic contact part 135 respectively protrude from the upper opening of the upper insulating body 11 and the lower opening of the lower insulating body 12. When in use, only the chip module 2 and the circuit board 3 are placed on the upper and lower sides of the connector 1 respectively, and the chip module It can be installed on the circuit board. The solder-free electrical connector is tightly sandwiched between the chip module and the circuit board. The upper elastic contact part 134 of the solder-free electrical connector is in elastic contact with the chip module. The lower elastic contact part 135 of the connector is in elastic contact with the circuit board, thereby forming an electrical connection path between the chip module and the circuit board. This structure avoids the welding of the connector and the circuit board. When the damage needs to be repaired or needs to be replaced, it can be quickly realized by disassembling the connecting parts, avoiding the waste caused by damaged parts or replacement parts that cannot be disassembled, reducing the cost of repairing and upgrading maintenance of electronic equipment, and reducing the waste pollution of electronic products environment, and the application is simple in structure, small in size, easy to manufacture and assemble, and more stable in electrical conduction when used on a circuit board.

The upper insulating body 11 is provided with at least two connection positioning holes 112, and the lower insulating body 12 is provided with at least two connection positioning posts 122, and the connection positioning posts 122 can be fixedly inserted into the connection positioning holes one by one. 112 inside.

The upper insulating body 11 and the lower insulating body 12 are assembled and positioned by connecting the positioning holes 112 and the connecting positioning columns 122. The connecting positioning holes 112 are optimally symmetrically distributed on the two opposite sides of the upper insulating body 11 to realize the connection force. Evenly distributed, such as distributed on the four corners of the upper insulating body 11 , the connecting positioning posts 122 and the connecting positioning holes 112 can be aligned and matched.

The upper insulating body 11 is provided with at least two connection positioning posts 122, and the lower insulating body 12 is provided with at least two connection positioning holes 112, and the connection positioning posts 122 can be fixedly inserted into the connection positioning holes one by one. 112 inside.

The connection positioning post 122 is fixed and positioned with the connection positioning hole 112 through interference fit, hot melt connection, buckle connection or connector connection.

In order to improve the connection strength of the interference fit, a number of ribs extending along the direction of its generatrix can be evenly spaced on the outer wall of the connection positioning column 122, and the interference fit is formed through the tight contact between the ribs and the connection positioning hole 112. The connection requires that the height of the connecting positioning column 122 is greater than the length of the connecting positioning hole 112, and the above connection method can be flexibly selected according to design requirements.

The terminal 13 includes an upper elastic arm 132 and a lower elastic arm 133, and one end of the upper elastic arm 132 and the lower elastic arm 133 are respectively stopped by the inner wall of the cavity space formed by the opening groove of the upper terminal 13 and the opening groove of the lower terminal 13. Positioning, the other ends of the upper elastic arm 132 and the lower elastic arm 133 form an elastic cantilever structure, and the upper elastic contact part 134 and the lower elastic contact part 135 are V-shaped bending structures formed by bending the upper elastic arm 132 and the lower elastic arm 133 respectively , the opening of the V-shaped bending structure faces the inner direction of the cavity space jointly formed by the opening groove of the upper terminal 13 and the opening groove of the lower terminal 13, and the two ends of the upper elastic arm 132 and the lower elastic arm 133 respectively stop against the opening groove of the upper terminal 13 And on the inner side wall of the opening groove of the lower terminal 13.

The terminal 13 forms a structure that can elastically swing up and down through the upper elastic arm 132 and the lower elastic arm 133, so as to realize the elastic movement up and down of the upper elastic contact part 134 and the lower elastic contact part 135, thereby closely contacting the chip module and the circuit board. Generally speaking, the upper elastic contact portion 134 and the lower elastic contact portion 135 are formed by bending the upper elastic arm 132 and the lower elastic arm 133 respectively, the structure is simple, and it is convenient for processing and manufacturing, and the upper elastic contact portion 134 and the lower elastic contact portion 135 are formed by bending Bent to form a V-shaped bending structure, which protrudes from the upper opening of the upper terminal receiving groove 111 and the lower opening of the lower terminal receiving groove 121, and its side wall is received by the upper end opening of the upper terminal receiving groove 111 and the lower opening of the lower terminal receiving groove 121. The wall is limited, and it will not shake left and right. At the same time, its V-shaped structure can realize normal movement up and down through the slope, and the inner space of the upper terminal receiving groove 111 and the lower terminal receiving groove 121 is large, and the upper terminal receiving groove 111 is opened at the upper end and the lower terminal is accommodated. The opening of the lower end of the slot 121 is small in size. After the upper and lower insulating bodies 12 are combined, a cavity with a large internal space and a small external opening is formed. The internal space is large. The upper elastic arm 132 and the lower elastic arm 133 of the terminal 13 can freely bounce up and down, and the external opening Small, the upper elastic contact portion 134 and the lower elastic contact portion 135 can be limited. In addition to this structure, it can be elastic sliding on the upper and lower sides of the terminal 13 fixedly installed in the upper terminal accommodating groove 111 and the lower terminal accommodating groove 121. Parts or elastic elements, such as shrapnel, springs, elastic slides, etc.

The upper terminal receiving groove 111 is formed with an upper terminal receiving groove left limiting surface 1112, an upper terminal receiving groove upper limiting surface 1111 and an upper terminal receiving groove right limiting surface 1113, and the lower terminal receiving groove 121 is formed with a lower terminal receiving groove. The left limiting surface 1212 of the groove, the lower limiting surface 1211 of the lower terminal receiving groove and the right limiting surface 1213 of the lower terminal receiving groove, the upper limiting surface 1111 of the upper terminal receiving groove is an inclined surface gradually inclined upward from left to right, and the upper terminal The right limiting surface 1113 of the receiving groove is an inclined surface that gradually slopes downward from left to right, and the lower limiting surface 1211 of the lower terminal receiving groove is an inclined surface that gradually slopes downward from left to right. The bit surface 1213 is an inclined surface that gradually inclines upward from left to right. The left end of the upper elastic arm 132 is close to the left limit surface 1112 of the upper terminal receiving groove, and the upper elastic arm 132 is inclined upward along the upper limit surface 1111 of the upper terminal receiving groove. Extending, the free end 136 of the upper elastic arm extends obliquely downward along the right limiting surface 1113 of the upper terminal receiving groove, the left end of the lower elastic arm 133 is tightly against the left limiting surface 1212 of the lower terminal receiving groove, and the lower elastic arm 133 extends along the lower terminal receiving groove. The lower limiting surface 1211 of the receiving groove extends obliquely downward, and the free end 137 of the lower elastic arm extends obliquely upward along the right limiting surface 1213 of the lower terminal receiving groove. The upper limit surface 1111 of the upper terminal receiving groove, the right limiting surface 1113 of the upper terminal receiving groove, the lower limiting surface 1211 of the lower terminal receiving groove and the right limiting surface 1213 of the lower terminal receiving groove respectively provide the upper elastic arm 132 and the lower elastic arm 133 with preset The pressure is conducive to increasing the positive contact force of the terminal 13, ensuring its stable and elastic contact with the chip module and the circuit board.

The ends of the upper elastic arm 132 and the free ends 137 of the lower elastic arm are respectively formed with bending structures facing the inner direction of the cavity space. The free ends 137 of the upper elastic arm 132 and the lower elastic arm are reversely bent to form a smooth arc surface, preventing the upper elastic arm 132 and the lower elastic arm 133 from colliding with the upper terminal receiving groove during elastic deformation. 111 interferes with the side wall of the lower terminal receiving groove 121 .

The terminal 13 also includes a base 131 extending in the vertical direction, the base 131 is close to the left limiting surface 1112 of the upper terminal receiving groove and the left limiting surface 1212 of the lower terminal receiving groove, the upper elastic arm 132 and the lower elastic arm 133 The upper end and the lower end of the base part 131 are respectively bent and extended. The terminal 13 can be integrally formed by punching and bending a metal sheet. It has a simple structure, is easy to process, has good overall elasticity, and forms a symmetrical structure. The circuit board makes a stable elastic contact.

The width of the base 131 is larger than the width of the upper elastic arm 132 and the lower elastic arm 133 , and the base 131 is tightly sandwiched between the two side walls of the upper terminal receiving groove 111 and the lower terminal receiving groove 121 along the width direction of the terminal 13 , The gap between the upper elastic arm 132 and the lower elastic arm 133 gradually increases from the root to the free end direction and the inner side walls of the upper terminal receiving groove 111 and the lower terminal receiving groove 121 in the width direction. This structure can ensure that the terminals 13 are positioned stably in the upper terminal receiving groove 111 and the lower terminal receiving groove 121 without affecting the elastic movement of the upper elastic arm 132 and the lower elastic arm 133 .

The upper terminal accommodating grooves 111 and the lower terminal accommodating grooves 121 on the upper insulating body 11 and the lower insulating body 12 are respectively arranged in an array state at regular intervals. The connector, the chip module and the circuit board can transmit the signal evenly, and the stability of the signal transmission can be improved.

Claims (10)

1. A welding-free electrical connector, characterized in that: it includes an upper insulating body (11), a lower insulating body (12) and a terminal (13), and the upper insulating body and the lower insulating body can be fixed from top to bottom In the structure formed by stacking, the upper insulating body is provided with at least one upper terminal receiving groove (111) whose upper opening size is smaller than the lower opening size, and the lower insulating body is provided with at least one lower terminal whose upper opening size is larger than the lower opening size The receiving groove (121), the upper terminal receiving groove and the lower terminal receiving groove are arranged opposite to each other, and the terminals can be fixedly accommodated in the cavity space formed jointly by the upper terminal receiving groove and the lower terminal receiving groove, and the terminal is provided with There are an upper elastic contact part and a lower elastic contact part that can elastically stretch and move in the up and down direction, and the upper elastic contact part (134) and the lower elastic contact part (135) can be respectively accommodated through the upper end opening of the upper terminal accommodating groove and the lower terminal The opening of the lower end of the groove protrudes to the outer side of the upper end of the upper insulating body and the outer side of the lower end of the lower insulating body. 2. The welding-free electrical connector according to claim 1, characterized in that: the upper insulating body is provided with at least two connection positioning holes (112), and the lower insulating body is provided with at least two connection positioning columns ( 122), the connection positioning columns can be fixedly inserted into the connection positioning holes one by one. 3. The welding-free electrical connector according to claim 1, characterized in that: the upper insulating body is provided with at least two connection positioning posts, and the lower insulating body is provided with at least two connection positioning holes, and the connection The positioning posts can be fixedly inserted into the connecting positioning holes one by one. 4. The welding-free electrical connector according to claim 2 or 3, characterized in that: the connection positioning post and the connection positioning hole are fixed and positioned by means of interference fit, hot-melt connection, buckle connection or connector connection . 5. The welding-free electrical connector according to claim 1, characterized in that: the terminal includes an upper elastic arm (132) and a lower elastic arm (133), and one end of the upper elastic arm and the lower elastic arm are connected to the upper elastic arm respectively. The inner side wall of the cavity space formed by the terminal opening groove and the lower terminal opening groove is used for stop positioning. The other ends of the upper elastic arm and the lower elastic arm form an elastic cantilever structure. The upper elastic contact part and the lower elastic contact part are respectively the upper elastic arm and the lower elastic contact part. The elastic arm is bent to form a V-shaped bending structure. The opening of the V-shaped bending structure faces the inner direction of the cavity space formed by the upper terminal opening groove and the lower terminal opening groove. The two ends of the upper elastic arm and the lower elastic arm are respectively The stops are on the inner side walls of the upper terminal opening groove and the lower terminal opening groove. 6. The solder-free electrical connector according to claim 5, characterized in that: the upper terminal receiving groove is formed with a left limiting surface (1112) of the upper terminal receiving groove, an upper limiting surface (1111) of the upper terminal receiving groove and the right limiting surface (1113) of the upper terminal receiving groove, and the left limiting surface (1212) of the lower terminal receiving groove, the lower limiting surface (1211) of the lower terminal receiving groove and the right limiting surface of the lower terminal receiving groove are formed in the lower terminal receiving groove surface (1213), the upper limit surface of the upper terminal receiving groove is an inclined surface that gradually slopes upward from left to right, and the right limit surface of the upper terminal receiving groove is an inclined surface that gradually slopes downward from left to right. The lower limiting surface of the lower terminal receiving groove is an inclined surface that gradually slopes downward from left to right, and the right limiting surface of the lower terminal receiving groove is an inclined surface that gradually slopes upward from left to right. The left end of the upper elastic arm is tightly against the upper On the left limiting surface of the terminal receiving groove, the upper elastic arm extends obliquely upward along the upper limiting surface of the upper terminal receiving groove, and the free end (136) of the upper elastic arm extends obliquely downward along the right limiting surface of the upper terminal receiving groove. The left end of the arm presses against the left limiting surface of the lower terminal receiving groove, the lower elastic arm extends obliquely downward along the lower limiting surface of the lower terminal receiving groove, and the free end (137) of the lower elastic arm extends upwardly along the right limiting surface of the lower terminal receiving groove . 7. The solder-free electrical connector according to claim 6, characterized in that: the free ends of the upper elastic arm and the lower elastic arm are respectively formed with bending structures facing the inner direction of the cavity space. 8. The solder-free electrical connector according to claim 6, characterized in that: the terminal further includes a base (131) extending in the up and down direction, and the base is close to the left limiting surface and the lower side of the upper terminal receiving groove. On the left limiting surface of the terminal receiving groove, the upper elastic arm and the lower elastic arm are respectively bent and extended from the upper end and the lower end of the base. 9. The solder-free electrical connector according to claim 8, characterized in that: the width of the base is larger than the width of the upper elastic arm and the lower elastic arm, and the base is tightly sandwiched between the upper terminal receiving groove and the lower terminal receiving Between the two side walls of the slot along the terminal width direction, the gap between the upper elastic arm and the lower elastic arm from the root to the free end direction and the inner side walls of the upper terminal receiving groove and the lower terminal receiving groove in the width direction gradually increases. 10. The solder-free electrical connector according to claim 1, characterized in that: the upper terminal receiving grooves and the lower terminal receiving grooves on the upper insulating body and the lower insulating body are respectively arranged in an array and evenly spaced.

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