CN-116153714-B - Reed relay core and reed relay

CN116153714BCN 116153714 BCN116153714 BCN 116153714BCN-116153714-B

Abstract

The invention discloses a reed relay movement, which comprises a reed switch, a coil frame and a lead frame, wherein the reed switch comprises two reed piece first leading-out pins, the coil frame comprises a middle circular tube-shaped winding part and two heads connected with two ends of the winding part, a mounting through hole is formed in the middle of the coil frame, the reed switch is mounted in the mounting through hole, one ends of the two reed piece first leading-out pins penetrate out of two ends of the mounting through hole respectively, the lead frame comprises two reed piece second leading-out pins, each reed piece second leading-out pin comprises a first connecting part and a first pin, a positioning part is arranged on each head, the first connecting part of each reed piece second leading-out pin is close to one end of one reed piece first leading-out pin after being mutually matched and positioned, one end of the reed piece first leading-out pin is fixedly connected with the first connecting part through welding flux to form electric connection, the original sealing performance of the reed switch glass tube can be ensured, and the reed switch is convenient to assemble.

Inventors

CAO LICHAO
LIN JIABIN
DONG XINSHANG
MAO QIMING

Assignees

厦门宏发信号电子有限公司

Dates

Publication Date: 20260508
Application Date: 20221230

Claims (13)

1. The utility model provides a reed relay core, includes reed switch, coil rack and lead frame, and the reed switch is including two reed piece first pin that stretch out from the sintering section at glass pipe both ends respectively, and the coil rack is equipped with the installation through-hole including middle tubulose wire winding portion and two heads at connection wire winding portion both ends in the middle of the coil rack, and the installation through-hole runs through two the head terminal surface, the glass pipe of reed switch is installed in the installation through-hole of coil rack, and two reed piece first pin one end wears out from the installation through-hole both ends respectively, its characterized in that: the lead frame comprises two reed second lead-out pins; Each tongue reed second lead-out pin comprises a first connecting part and a first pin, the first pin is connected with one end of the first connecting part, each head part is provided with a positioning part, after the first connecting part of each tongue reed second lead-out pin is mutually matched and positioned with the positioning parts, the first connecting part is close to one end of one tongue reed first lead-out pin, the middle section of the first connecting part is provided with a bending section, the bending section gives way to one end of the first lead-out pin of the tongue reed, so that one end of the first lead-out pin of the tongue reed is not in direct contact with the first connecting part before welding, and the bending section of the first connecting part is fixedly connected with one end of the first lead-out pin of the tongue reed through welding to form electric connection; the inner diameter of one end of the installation through hole is smaller than that of the other end, the inner surface of the installation through hole is in smooth transition from one end to the other end, and one end of the glass tube is positioned through the inner surface of the installation through hole.
2. The reed switch movement of claim 1, wherein the bending section is an arcuate bending section.
3. The reed switch movement of claim 1, wherein the positioning portion is a positioning protrusion or a positioning groove provided on an end surface of the head.
4. The reed switch movement of claim 1, wherein the other end of the first connecting portion of each second lead-out leg of each reed is protruded outside the head portion and extends along the axial direction of the winding portion by a magnetic circuit coupling portion, and the magnetic circuit coupling portions of the second lead-out legs of the two reed are close to each other but leave a gap.
5. The reed switch movement of claim 4, wherein the opposite ends of the magnetic circuit coupling portions are each provided with an inclined surface, and the inclined surfaces are parallel.
6. The reed switch movement of claim 1, wherein each of the first connecting portions has a positioning protrusion extending from the other end thereof, the positioning protrusion being adapted to be positioned in cooperation with the head.
7. The reed switch core of claim 1, wherein the lead frame further comprises two coil lead pins, each coil lead pin comprises a second connecting part and a second pin which are connected with each other, each head part of the coil frame is fixedly connected with a coil terminal through injection molding, the coil terminal is provided with two connecting ends, one connecting end of the coil terminal is wound with one end of the coil, and the other connecting end of the coil terminal is fixedly connected with one side of the second connecting part through welding to form electric connection.
8. The reed switch movement of claim 7, wherein each coil terminal is L-shaped, a chamfer is arranged at the end part of a connecting end, which is wound on one end of each coil terminal, an arc-shaped groove is arranged at the end part of the other connecting end, which is welded on each second connecting part, of each coil terminal, a guide groove which is convenient for the second connecting part to be attached to the other connecting end of each coil terminal is arranged at the other connecting end of each head part, one side of each second connecting part is outwards extended to form a welding convex part, the welding convex part is attached to the other connecting end of each coil terminal through the guide groove and is fixedly connected with the other connecting end of each coil terminal through welding, and/or a connecting groove is further arranged at the other side of each second connecting part, and the connecting grooves on the two second connecting parts are respectively fixedly connected with two ends of one diode through welding flux or laser.
9. A reed relay movement according to any one of claims 1 to 8, wherein two reed pieces are arranged in a glass tube of the reed switch, each reed piece comprises a flexible contact connecting part and a contact part which are connected with each other, the two reed pieces are contacted with each other or separated from each other through the two contact parts, the flexible contact connecting part of each reed piece is fixedly connected with a first leading-out pin of each reed piece, each first leading-out pin of each reed piece is fixedly connected with one sintering section into a whole through a middle connecting part, a pit is arranged on the middle connecting part of each first leading-out pin of each reed piece, and glass of the sintering section is embedded into the pit.
10. The reed relay movement of claim 9, wherein the flexible contact connecting portion is a strip-shaped plate, two sides of one side of the flexible contact connecting portion, which is close to the first leading-out pin of the reed, are provided with notches, the notches on the two sides are symmetrical to each other in the width direction of the flexible contact connecting portion, the flexible contact connecting portion is bent along the section, and the bending direction is opposite to the contact moving direction of the reed contact portion.
11. The reed relay movement according to claim 9, wherein a flattening section is arranged at a position, close to the sintering section, of each reed piece first leading-out pin outside the glass tube, and the flattening section is parallel or perpendicular to the contact direction of the contact part; the contact part, the flexible contact connecting part and the reed piece first lead-out pin are integrally formed by stamping, and the upper end surface and the lower end surface of the flexible contact connecting part are parallel to the contact surface of the contact part.
12. A reed switch comprises a shell and is characterized by further comprising the reed switch core according to any one of claims 1-11, wherein the reed switch core is arranged in the shell and fixedly connected with the shell, first pins in second leading-out pins of two tongue springs extend out of the shell, and two ends of a coil of the reed switch core extend out of the shell through the two coil leading-out pins.
13. The reed relay of claim 12, wherein the housing is fixedly connected to the reed relay core by injection molding, or wherein the housing is fixedly connected to the reed relay core by epoxy injection molding.

Description

Reed relay core and reed relay Technical Field The invention relates to the technical field of dry reed relay manufacturing, in particular to a dry reed relay movement and a dry reed relay. Background The reed relay is a derivative based on the reed switch technology, and the reed switch adopts a special packaging structure (glass tube is sintered in a closed way) and a process (inert gas is filled in the glass tube or vacuum treatment is carried out), so that the reed part of the reed relay can be prevented from being polluted and corroded by the external atmosphere environment, and therefore, the reed relay has incomparable high contact reliability and excellent insulating property. In fields where high insulation and high contact reliability are sought (represented by instrument testing, network communication, new energy insulation detection, and medical electronics), dry reed relays have been widely accepted and used. The existing reed relay generally comprises a reed switch, a coil frame, a coil, a lead frame and a shell, wherein the reed switch is a core component of the reed relay, so that the manufacturing difficulty of the reed relay is how to guarantee the initial tightness of the reed switch to the greatest extent. In the reed relay structure, because the lead frame is electrically connected with the reed lead-out feet of the reed switch, in the assembly process of all parts, the lead frame can transmit stress to the sintered section of the glass tube of the reed switch through the reed lead-out feet, and the sintered section of the glass tube of the reed switch is easy to break due to the brittleness of glass materials, so that the glass tube is damaged due to the loss of sealing property, and the performance of the reed switch is directly affected. Disclosure of Invention The invention aims to solve the technical problem of providing a reed relay movement which can ensure the original tightness of a reed switch glass tube, ensure the exertion of the reed switch performance and is convenient to assemble. The technical scheme includes that the reed relay core comprises a reed switch, a coil frame and a lead frame, wherein the reed switch comprises two reed piece first leading-out pins which extend out of sintering sections at two ends of a glass tube respectively, the coil frame comprises a middle circular tube-shaped winding part and two heads which are connected with two ends of the winding part, a mounting through hole is formed in the middle of the coil frame and penetrates through the end faces of the two heads, the glass tube of the reed switch is mounted in the mounting through hole of the coil frame, one end of each reed piece first leading-out pin penetrates out of two ends of the mounting through hole respectively, the lead frame comprises two reed piece second leading-out pins, each reed piece second leading-out pin comprises a first connecting part and a first pin, the first pin is connected with one end of the first connecting part, after the first connecting part of each reed piece second leading-out pin and the positioning part are mutually matched and positioned, the first connecting part is close to one reed piece first leading-out pin end, and one reed piece first leading-out pin end and the first reed piece first leading-out pin are fixedly connected with the first connecting part through the first connecting part in a welding mode. Further improved, the middle section of the first connecting part is provided with an arc bending section, the arc bending section gives way to one end of the first leading-out pin of the tongue reed, so that the other end of the first leading-out pin of the tongue reed is not in direct contact with the first connecting part before welding, and the arc bending section is fixedly connected with one end of the first leading-out pin of the tongue reed through welding to form electric connection. Therefore, the direct contact between the first connecting part and the tongue piece leading-out pin before welding can be avoided, the effective welding area of the tongue piece leading-out pin and the first connecting part can be increased, and the welding firmness is improved. Preferably, the positioning portion is a positioning protrusion or a positioning groove provided on the end face of the head. Further improved, the inner diameter of one end of the installation through hole is smaller than that of the other end, the inner surface of the installation through hole is in smooth transition from one end to the other end, and one end of the glass tube is positioned through the inner surface of the installation through hole. Therefore, accurate positioning between the reed switch and the coil rack can be ensured, assembly is convenient, and consistency of parameters can be ensured. Further improved, the other end of the first connecting part of the second leading-out pin of each tongue reed protrudes out of the head part and extends a magnetic circuit couplin