A multilayer spring-type relay with high current tolerance

Abstract

This invention discloses a multilayer spring relay with high current withstand capability, comprising a base and a housing. One side of the base forms a receiving area, and the housing movably covers the receiving area. A coil assembly is disposed in the receiving area. A magnetic actuation assembly is disposed in the receiving area, with one end of the magnetic actuation assembly magnetically attracted to the coil assembly, and the other end of the magnetic actuation assembly having a protruding push rod. A spring assembly is disposed in the receiving area and close to the magnetic actuation assembly. The spring assembly includes different numbers of hard metal springs and soft metal sheets stacked together to form at least two bent portions. A limiting hole penetrates the stack of hard metal springs and soft metal sheets, and the push rod movably passes through the limiting hole. Two terminal blocks are installed on the base at intervals, with the two terminal blocks partially penetrating the base and exposing the bottom surface of the base. One end of the spring assembly is fixed to one of the terminal blocks, while the other end of the spring assembly is movably electrically contacting the other terminal block.

Claims

1. A multilayer spring relay with high current withstand capability, comprising: a main body including a base and a housing, wherein a receiving area is formed on one side of the base, and the housing is movably covered by the receiving area of ​​the base; a coil assembly installed at a portion of the receiving area; a magnetic actuation assembly installed in the receiving area and mounted on one end of the coil assembly, wherein the magnetic actuation assembly is magnetically attracted to the coil assembly when a magnetic field is generated at one end, and releases the magnetic attraction when the coil assembly does not generate a magnetic field, and a push rod is protruding from the other end of the magnetic actuation assembly; a spring assembly installed in the receiving area and near the end of the magnetic actuation assembly where the push rod is located, wherein the spring assembly comprises different numbers of hard metal springs and soft metal sheets stacked together to form at least two bent portions, and a limiting hole passes through the stack of the different numbers of hard metal springs and each soft metal sheet, and the push rod is movably inserted into the limiting hole; Two terminal blocks are installed on the base at intervals, with a portion of the two terminal blocks located in the receiving area and the other portion of the two terminal blocks passing through the base and exposed on the bottom surface of the base. One end of the spring contact assembly is fixed to one of the two terminal blocks, while the other end of the spring contact assembly is moved by the magnetic actuation assembly to make electrical contact with the other terminal block.

2. The multilayer spring relay with high current withstand capability as described in claim 1, wherein the spring assembly further comprises a first section and a second section with the at least two bent portions, the first section being fixed at one end to one of the two terminal blocks and connected to one end of the second section, the first section being concave to form one of the bent portions, and the limiting hole being provided in the first section; the other end of the second section corresponds to the other terminal block of the two terminal blocks, and the second section is riveted with a plurality of contact terminals that make active electrical contacts corresponding to the terminal blocks.

3. The multilayer spring relay with high current withstand capability as described in claim 2, wherein the limiting hole is a T-shaped hole and is divided into a straight hole section and a horizontal hole section, the straight hole section and the horizontal hole section are interconnected, and the push rod further includes, from bottom to top, a lower block, a neck and an upper block that are interconnected with each other, the length of the top end face of the upper block is less than the length of the top end face of the lower block; and the upper block moves from the horizontal hole section to the straight hole section. When the magnetic actuation group and the coil group are magnetically attracted to each other, the swing of the magnetic actuation group is caused by the top end face of the lower block section pushing the spring group to elastically deform and electrically contact the corresponding terminal block with each contact terminal; and when the magnetic actuation group and the coil group are demagnetized, the spring group elastically resets and pushes the magnetic actuation group to swing back to the initial position.

4. The multilayer spring relay with high current withstand capability as described in claim 1, wherein the spring assembly is further divided into a first section, a second section, a third section, and a fourth section by the arrangement of at least three bends; the first section is fixed to one of the two terminal blocks and connected to the second section, and a bend is formed between the first section and the second section; the second section is connected to the third section and forms another bend, and the third section is correspondingly arranged to the first section, and the limiting hole is provided in the third section; the fourth section is connected to the third section and forms another bend, and the fourth section corresponds to the other terminal block of the two terminal blocks, and the fourth section is riveted with a plurality of contact terminals that make active electrical contact with the corresponding terminal blocks.

5. The multilayer spring relay with high current withstand capability as described in claim 4, wherein the limiting hole is a T-shaped hole and is divided into a straight hole section and a horizontal hole section, the straight hole section and the horizontal hole section are interconnected, and the push rod further includes, from bottom to top, a lower block, a neck and an upper block that are interconnected with each other, the length of the top end face of the upper block is less than the length of the top end face of the lower block; and the upper block moves from the horizontal hole section to the straight hole section. When the magnetic actuation group and the coil group are magnetically attracted to each other, the swing of the magnetic actuation group is caused by the top end face of the lower block section pushing the spring group to elastically deform and electrically contact the corresponding terminal blocks with each contact terminal; and when the magnetic actuation group and the coil group are demagnetized, the spring group elastically resets and pushes the magnetic actuation group to swing back to the initial position.

6. The multilayer spring relay with high current withstand capability as described in claim 4, wherein the angle between the bend between the fourth section and the third section is greater than the angle between the third section and the second section, and between the second section and the first section.

7. The multilayer spring relay with high current withstand capability as described in claim 1, wherein the magnetic actuation assembly further includes a conductive sheet, a control sleeve, and an elastic sheet. The conductive sheet is inverted L-shaped and has one end movably electrically contacting a contact of the coil assembly. The other end of the conductive sheet is inserted into the control sleeve. The push rod is disposed on the outer surface of the control sleeve. A hollow hole is formed at the bend of the conductive sheet. The elastic sheet is fixed to the outer surface of the conductive sheet at one end, and the other end of the elastic sheet passes through the hollow hole and is located between the control sleeve and the coil assembly. When the conductive sheet and the coil assembly are magnetically attracted to each other, the elastic sheet pushes the control sleeve to move with elastic force.

8. The multilayer spring relay with high current withstand capability as described in claim 1, wherein the receiving area of ​​the base is further provided with a partition, the partition dividing the receiving area into an upper section and a lower section, the coil group and part of the magnetic actuation group are installed in the lower section, and the spring group and the two terminal blocks are located in the upper section.

9. A multilayer spring relay with high current withstand capability as described in claim 1, wherein at least one insulating spacer is further provided within the spring group, each insulating spacer being made of polyester or ceramic material.

10. The multilayer spring relay with high current withstand capability as described in claim 4, wherein the bend formed between the first section connecting the second section and the second section connecting the third section further includes a plurality of gap regions formed between each hard metal spring and each soft metal sheet, and each gap region is filled with an insulating material.

Images