CN219979455U

CN219979455U - Reed relay core and reed relay

Info

Publication number: CN219979455U
Application number: CN202321101514.7U
Authority: CN
Inventors: 毛启明; 林佳宾; 董欣赏; 陈泽州; 曹利超
Original assignee: Xiamen Hongfa Signal Electronics Co ltd
Current assignee: Xiamen Hongfa Signal Electronics Co ltd
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-11-07
Anticipated expiration: 2033-05-09

Abstract

The utility model discloses a reed relay core, which comprises a coil framework, reed pipes and two reed piece lead frames, wherein the reed pipes are arranged in central holes of the coil framework, two reed piece lead pins of the reed pipes extend out from two ends of the coil framework, a coil is wound on the coil framework, each reed piece lead frame is provided with a connecting part and a lead pin, and the connecting parts of the two reed piece lead frames are respectively welded with the two reed piece lead pins; the connecting part of at least one reed lead frame is provided with a connecting groove, the connecting groove is contacted with one reed lead pin through two opposite limiting surfaces and limits the radial displacement of the reed lead pin along the coil, and then the connecting part of the reed lead frame is welded with the reed lead pin. The utility model also discloses a reed relay with the movement. The utility model improves the positioning precision when the reed lead frame and the reed lead pin are assembled, is convenient for forming electric connection by laser welding, and ensures the quality of the reed relay.

Description

Reed relay core and reed relay

Technical Field

The utility model 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 a reed switch technology and mainly comprises a reed pipe and an excitation coil. The tongue reed (contact) is sealed in a glass tube filled with inert gas such as nitrogen, and is usually made of iron-nickel alloy, and the contact part of the tongue reed is usually plated with precious metal (such as gold, rhodium, palladium and the like), so that the contact is good, and the contact has excellent conductive performance. Because the contact is sealed in the glass tube filled with inert gases such as nitrogen, the pollution of dust is effectively prevented, the corrosion of the contact is reduced, and the working reliability is improved. 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. Nowadays, reed relays are also miniaturized to meet more application occasions.

In order to meet the matching of the leading-out pin and the circuit board, the conventional reed relay is often required to be additionally provided with a lead frame to connect two ends of the reed leading-out pin and the exciting coil of the reed, most of the reed leading-out pin of the reed is cylindrical, the connection of the lead frame and the reed leading-out pin is required to be completed through welding, the traditional tongue reed leading-out pin and the lead frame are in supporting matching with each other to form an arc surface to be in plane contact, the contact part is a straight line, the supporting surface of the lead frame is a plane, and thus, the reed leading-out pin is only stressed by a vertical downward gravity G and a supporting force N opposite to the vertical gravity G in the same direction, and the left direction and the right direction of the leading-out pin are not stressed. In the process of transmitting the electromagnetic part assembly process to the subsequent welding process, the production line is interfered by force in the transmission direction of the strip material under the action of inertia at the moment of starting and stopping of transmission, and because the force is not stressed in the left-right direction, when the force is larger than the maximum static friction force suffered by the electromagnetic part, the leading-out pin of the reed switch slides or rolls to generate displacement, so that the problems of instability after assembly and poor positioning precision exist; and further, the problem that the welding problem affects the reliability of the electrical connection, and larger stress generated in the welding process can damage the sealing performance of the reed switch is caused.

The problems are that a welding process with relatively low requirements on positioning accuracy can only be selected when the welding process is selected, such as a tin brazing process, but tin slag is easy to generate in the welding process by adopting the tin brazing process, and the surface of an enameled wire of an electromagnetic part coil is exposed during the welding process, and the temperature of the tin slag is far higher than the temperature resistance of a paint film of the enameled wire, if the tin slag splashes to the surface of the enameled wire, the paint film is destroyed, and the contact inter-turn short circuit between the enameled wires causes the failure of a relay, so that waste products can be possibly generated, and secondly, the tin brazing process is low in efficiency, and the overall production beat is influenced, so that the production efficiency is influenced.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a reed relay core, which improves the positioning precision when a reed lead frame and a reed lead pin of a reed pipe are assembled, is convenient for forming electric connection by laser welding and ensures the quality of a reed relay.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the reed relay core comprises a coil framework and a reed pipe, wherein the reed pipe is arranged in a central hole of the coil framework, two reed lead-out feet of the reed pipe extend out from two ends of the coil framework, a coil is wound on the coil framework, the reed relay core further comprises two reed lead frames, a connecting part and a lead-out foot are arranged on each reed lead frame, and the connecting parts of the two reed lead frames are respectively welded with the two reed lead-out feet so that the two reed lead frames are respectively electrically connected with the two reed lead-out feet; the connecting part of at least one reed lead frame is provided with a connecting groove, the connecting groove is contacted with one reed lead pin through two opposite limiting surfaces and limits the radial displacement of the reed lead pin along the coil, and then the connecting part of the reed lead frame is welded with the reed lead pin.

Further improved, the two reed lead frames are connected by a removable connecting material. Therefore, the mutual positioning precision of the two reed lead frames before welding can be ensured, and the assembly is convenient.

Further improved, the connecting parts of the two reed lead frames are respectively provided with a connecting groove, the two reed lead frames are respectively a first reed lead frame and a second reed lead frame, the first reed lead frame is provided with a first connecting part and a first leading-out pin, and the first connecting part is provided with a first connecting groove; the second reed lead frame is provided with a second connecting part and a second leading-out pin, and the second connecting part is provided with a second connecting groove; the first connecting groove is contacted with one reed leading-out pin through two opposite limiting surfaces, the second connecting groove is contacted with the other reed leading-out pin through two opposite limiting surfaces, and the first connecting groove and the second connecting groove limit the coil framework and the reed pipe together to displace along the radial direction of the coil, and then the connecting part of the reed lead frame is welded with the reed leading-out pin. Therefore, the positioning of the two reed sheet leading-out pins before welding can be further improved, and the reed pipe, the electromagnetic part and the reed lead frame are ensured not to mutually shift in the assembly process of the production line.

Further improved, a positioning structure for mutually positioning is arranged between the first reed lead frame and the coil framework, and the first reed lead frame and the coil framework are limited to mutually shift through the positioning structure. Further improving the mutual positioning precision of the tongue reed lead frame and the electromagnetic part.

Preferably, the positioning structure comprises two matching grooves arranged on the coil framework, the first connecting part and the first leading-out pin of the first reed lead frame are connected through a first transition part to form a whole, two positioning parts are outwards extended at intervals of the first transition part, and each positioning part is matched with one matching groove.

Preferably, the first connection groove is formed by bending or cutting the first connection part.

Preferably, the cross section of the first connecting groove is V-shaped or U-shaped or arc-shaped; the cross section of the second connecting groove is arc-shaped or V-shaped or U-shaped.

Further, when the cross section of the first connecting groove is arc-shaped or semicircular, two opposite limiting surfaces of the first connecting groove are connected into one surface; when the cross section of the second connecting groove is arc-shaped or semicircular, two opposite limiting surfaces of the second connecting groove are connected into one surface.

As an improvement, the second connecting part and the second leading-out pin on the second reed lead frame are connected and integrated through a second transition part, the second connecting groove is formed by punching the second connecting part, and the second connecting part and the second leading-out pin are perpendicular through bending of the second transition part; and a yielding notch is further arranged on the second connecting part at one side of the second connecting groove.

The length of the coil axial direction of the reed relay core after assembly can be reduced by bending the second transition part, or the size of the coil framework in the coil axial direction can be increased under the condition that the total length of the reed relay core is unchanged; when the size of the coil skeleton in the axial direction of the coil is increased, the length space of a winding window of the coil skeleton is increased, so that the outer diameter of the wound coil is smaller and the length of the wound coil is longer under the condition that technical parameters of the dry spring relay core and coil ampere turns are unchanged. The maximum size of the core in the thickness direction of the dry spring relay is determined by the size of the outer diameter of the coil, so that the thickness of the dry spring relay is reduced after the core is manufactured into the dry spring relay through subsequent procedures, and the volume of the dry spring relay is reduced.

On the other hand, if the original external dimension of the reed relay core is kept, after the dimension of the coil framework in the axial direction of the coil is increased, the central hole of the coil framework can accommodate the reed pipe with longer length, and the number of coil ampere-turns can be more, and when the AT value of the reed pipe is the same, the larger the ampere-turn value of the coil is, the larger the margin of the action voltage of the coil AT high temperature is. And the coil ampere-turns are larger, so that the electrical parameters of the product are better controlled in the production process, the product qualification rate in production can be improved, and the scrapping cost is reduced. Therefore, the performance of the reed relay can be improved, and the requirements of more clients for different load applications can be met.

Secondly, can also reduce and produce stress problem after the welding, this improvement structure is punching press according to reed pipe reed piece pin-out size when reed piece lead frame area material punching press and is formed the connection recess after, carries out 90 bending through the second transition portion and forms the sinking space, makes electromagnetic part still can be in reed relay core thickness direction more central position. The opening of the second connecting groove is changed into a vertical upward direction through bending, and the opening becomes a supporting surface of the reed switch leading-out pin of the reed switch; therefore, the connecting groove can be contacted with the arc surface of the tongue piece leading-out pin through two opposite limiting surfaces, and the contact part is in surface contact, so that the two surfaces can be tightly and reliably combined, a good supporting and limiting effect is achieved, the problem of extra stress after welding is avoided, and the sealing performance of the reed pipe glass pipe is better protected.

And a yielding notch is arranged on the second connecting part at one side of the second connecting groove, so that the problems that the material is too close to the bending line to cause tearing of the material nearby after bending and the supporting surface is too close to the bending line to deform after bending can be avoided.

As another improvement, the second connection part and the second lead-out pin on the second reed lead frame are connected and integrated through a second transition part, and the second connection groove is formed by bending the second connection part. To facilitate processing.

Preferably, the first pin and the second pin are parallel to each other, and the first pin and the second pin are connected by a removable connecting material. So as to facilitate processing and mating with an external circuit board.

The reed relay movement is contacted with one reed leading-out pin through two opposite limiting surfaces of the connecting groove, and the reed leading-out pin is limited to shift along the radial direction of the coil, and then the connecting part of the reed lead frame is welded with the reed leading-out pin. On one hand, the positioning precision between the reed pin and the reed lead frame is improved, the constraint effect of two opposite limiting surfaces of the connecting groove is ensured, displacement caused by sliding or rolling of the reed pin of the reed tube in the process of generating line moving assembly is prevented, and the problems that the reliability of electric connection is affected by welding problems due to unstable assembly and poor positioning precision are avoided; secondly, because the connecting groove is in direct contact with one reed piece leading-out pin through two opposite limiting surfaces, the welding is convenient to carry out by adopting a laser welding process, the problem that the sealing performance of the reed pipe is damaged due to the stress generated by welding is avoided as much as possible by improving the positioning precision and adopting laser welding to form electric connection, the quality of the reed relay is effectively ensured, the generation efficiency can be improved, the qualification rate in production and assembly is improved, the product scrappage caused by poor assembly is reduced, and the production cost is reduced.

The utility model also discloses a reed relay, which comprises a shell, and further comprises the reed relay core, wherein the reed relay core is arranged in the shell and fixedly connected with the shell, the leading-out feet on the two reed sheet lead frames extend out of the shell, the two ends of a coil of the reed relay core are respectively and electrically connected with the two coil lead frames, the two coil lead frames are respectively provided with a coil leading-out foot, and the two coil leading-out feet extend out of the shell; the shell is fixedly connected with the reed switch core through injection molding; or the reed switch core is arranged in the shell and fixedly connected with the shell through an insulating sealing material. The relay can ensure better quality and is convenient for miniaturization.

Drawings

Fig. 1 is a perspective view of a first embodiment of the reed relay movement of the present utility model;

fig. 2 is a front view of a first embodiment of the reed relay cartridge of the present utility model;

FIG. 3 is a schematic diagram showing the separated state of the parts of the first embodiment of the reed switch movement of the present utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a front view of a first embodiment of a reed relay movement of the present utility model, showing a second transition portion of a second reed switch lead frame, before bending;

FIG. 6 is an enlarged view at B of FIG. 1;

FIG. 7 is a partial view in the direction C of FIG. 2;

fig. 8 is a schematic view of all lead frames of a first embodiment of the reed relay movement of the present utility model attached to a removable connector;

fig. 9 is a perspective view of a reed relay incorporating the reed relay movement of the first embodiment of the present utility model;

fig. 10 is a partial front view of a second embodiment of the reed relay cartridge of the present utility model;

fig. 11 is a partial perspective view of D of fig. 10.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

An embodiment one, fig. 1 to 8 show, a reed relay core, including coil skeleton 1, reed pipe 2 sets up in coil skeleton 1's centre bore, and two reed piece pin 21 of reed pipe 2 stretch out from coil skeleton 1 both ends, and coil skeleton 1 is last to be wound with coil 3, and reed pipe 2 can be with coil skeleton 1 integrative injection moulding, and reed pipe 2 also can link firmly through the sealant with coil skeleton 1.

The embodiment also comprises two reed lead frames 4, two coil lead frames 5 and a diode 6, wherein two ends of the diode 6 are respectively and electrically connected with the two coil lead frames 5 through welding; the two reed lead frames 4 are made of metal conductive materials, the two reed lead frames 4 are respectively a first reed lead frame 41 and a second reed lead frame 42, a first connecting portion 411 and a first leading-out foot 412 are arranged on the first reed lead frame 41, the first connecting portion 411 and the first leading-out foot 412 of the first reed lead frame 41 are connected and integrated through a first transition portion 413, a first connecting groove 4a is arranged on the first connecting portion 411, the first connecting groove 4a is formed by bending the first connecting portion 411, the first connecting groove 4a can also be formed by cutting, the first connecting groove 4a is provided with two opposite limiting surfaces 41a, and the cross section of the first connecting groove 4a is preferably V-shaped, or U-shaped or arc-shaped. When the cross section of the first connecting groove 4a is arc-shaped and is arc-shaped or semicircular, two opposite limiting surfaces 41a of the first connecting groove 4a are connected into one surface.

The second reed lead frame 42 is provided with a second connecting part 421 and a second leading-out pin 422, the second connecting part 421 and the second leading-out pin 422 on the second reed lead frame 42 are connected and integrated through a second transition part 423, the second connecting part 421 is provided with a second connecting groove 4b, and the second connecting groove 4b is provided with two opposite limiting surfaces 41b; the cross section of the second connecting groove 4b is preferably arc-shaped, and can also be V-shaped or U-shaped; when the cross section of the second connecting groove 4b is arc-shaped and is arc-shaped or semicircular, two opposite limiting surfaces 41b of the second connecting groove 4b are connected into one surface.

The second connecting groove 4b is formed by punching the second connecting portion 421, and is bent by the second transition portion 423 such that the second connecting portion 421 and the second lead 422 are perpendicular to each other; the second connecting portion 421 at one side of the second connecting groove 4b is further provided with a yielding notch 4c.

A positioning structure for positioning each other is arranged between the first reed lead frame 41 and the coil framework 1, and the first reed lead frame 41 and the coil framework 1 are limited to shift each other through the positioning structure; the positioning structure comprises two matching grooves 11 arranged on the coil skeleton 1, two positioning parts 4d are outwards extended from the first transition part 413 at intervals, and each positioning part 4d is matched with one matching groove 11.

The first connecting groove 4a contacts with one reed pin 21 through two opposite limiting surfaces 41a, the second connecting groove 4b contacts with the other reed pin 21 through two opposite limiting surfaces 41b, the first connecting groove 4a and the second connecting groove 4b limit the radial displacement of the coil bobbin 1 and the reed 2 along the coil 3 together, after that, the first connecting part 411 on the first reed lead frame 41 is connected with one reed pin 21 through laser welding, and the second connecting part 421 on the second reed lead frame 42 is connected with the other reed pin 21 through laser welding. Because the laser welding process can be adopted, the influence of welding slag on other parts is avoided, the welding reliability is further improved, the influence of stress generated by welding on the sealing performance of the reed switch can be reduced, and the quality of the movement is improved.

The two coil lead frames 5 comprise a first coil lead frame 51 and a second coil lead frame 52, the two coil lead frames 5 are made of metal conductive materials, the first coil lead frame 51 comprises a third connecting part 511 and a third lead-out pin 512, the second coil lead frame 52 comprises a fourth connecting part 521 and a fourth lead-out pin 522, the two coil conductive terminals 12 are fixedly connected to the coil frame 1 in an injection molding way, one ends of the two coil conductive terminals 12 are respectively electrically connected with two ends of the enameled wire of the coil 3, the third connecting part 511 and one coil conductive terminal 12 are electrically connected through welding, and the fourth connecting part 521 and the other coil conductive terminal 12 are electrically connected through welding; both ends of the diode 6 are electrically connected to the third connection portion 511 and the fourth connection portion 521, respectively.

The first pin 412, the second pin 422, the third pin 512, and the fourth pin 522 are parallel to each other; as further shown in fig. 8, the first lead-out pin 412, the second lead-out pin 422, the third lead-out pin 512 and the fourth lead-out pin 522 are connected by a removable connecting material 10 before welding, and after welding, the connecting material 10 can be blanked along the dotted line position in fig. 8.

Referring to fig. 1 and fig. 9, a reed relay includes a housing 20 and a reed relay core according to the first embodiment, where the reed relay core is mounted in the housing 20 and is fixedly connected to the housing 20, and the lead pins on the two reed lead frames 4, that is, the first lead pin 412 and the second lead pin 422, extend partially out of the housing 20, two ends of the coil 3 of the reed relay core are respectively and electrically connected to two coil lead frames 5, and the two coil lead frames 5 are each provided with one coil lead pin, and the two coil lead pins, that is, the third lead pin 512 and the fourth lead pin 522, extend partially out of the housing 20; the housing 20 of this embodiment is fixedly connected to the reed relay core by injection molding.

Another connection mode between the reed relay movement and the housing 20 may be: the housing 20 is injection molded, and then the reed relay core of this embodiment is mounted in the housing 20 and is fixedly connected by an insulating sealing material, which may be epoxy resin.

In the second embodiment, fig. 10 and 11 show a dry spring relay core, which is different from the first embodiment in that: the second reed lead frame 42 has a different structure, the second connecting groove 4b is formed by bending the second connecting portion 421, and the cross section of the second connecting groove 4b is V-shaped.

The second connecting groove 4b is brought into contact with the other reed pin 21 via two opposing stopper surfaces 41b and then electrically connected by laser welding.

The present embodiment can also be connected to the housing to form a reed relay in the same manner as the embodiment.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a reed relay core, includes coil skeleton, tongue tube, and the tongue tube sets up in coil skeleton's centre bore, and two reed piece pin-outs of tongue tube stretch out from coil skeleton both ends, and the coiling has coil, its characterized in that on the coil skeleton: the reed lead frames are respectively welded with the two reed lead pins, so that the two reed lead frames are respectively electrically connected with the two reed lead pins; the connecting part of at least one reed lead frame is provided with a connecting groove, the connecting groove is contacted with one reed lead pin through two opposite limiting surfaces and limits the radial displacement of the reed lead pin along the coil, and then the connecting part of the reed lead frame is welded with the reed lead pin.

2. A reed relay movement according to claim 1, wherein: the two reed lead frames are connected by a removable connecting material.

3. A reed relay movement according to claim 1 or 2, wherein: the connecting parts of the two reed lead frames are respectively provided with a connecting groove, the two reed lead frames are respectively a first reed lead frame and a second reed lead frame, the first reed lead frame is provided with a first connecting part and a first leading-out pin, and the first connecting part is provided with a first connecting groove; the second reed lead frame is provided with a second connecting part and a second leading-out pin, and the second connecting part is provided with a second connecting groove; the first connecting groove is contacted with one reed leading-out pin through two opposite limiting surfaces, the second connecting groove is contacted with the other reed leading-out pin through two opposite limiting surfaces, and the first connecting groove and the second connecting groove limit the coil framework and the reed pipe together to displace along the radial direction of the coil, and then the connecting part of the reed lead frame is welded with the reed leading-out pin.

4. A reed relay movement according to claim 3, wherein: and a positioning structure for mutually positioning is arranged between the first reed lead frame and the coil framework, and the first reed lead frame and the coil framework are limited to mutually shift through the positioning structure.

5. A reed relay cartridge as in claim 4, wherein: the positioning structure comprises two matching grooves arranged on a coil framework, the first connecting part of the first reed lead frame and the first leading-out pin are connected through a first transition part to form a whole, two positioning parts are outwards extended at intervals of the first transition part, and each positioning part is matched with one matching groove.

6. A reed relay movement according to claim 3, wherein: the first connecting groove is formed by bending or cutting the first connecting part.

7. A reed relay movement according to claim 3, wherein: the cross section of the first connecting groove is V-shaped or U-shaped or arc-shaped; the cross section of the second connecting groove is arc-shaped or V-shaped or U-shaped.

8. A reed relay movement according to claim 3, wherein: the second connecting part and the second leading-out pin on the second reed lead frame are connected and integrated through a second transition part, the second connecting groove is formed by punching the second connecting part, and the second connecting part and the second leading-out pin are perpendicular through bending of the second transition part; and a yielding notch is further arranged on the second connecting part at one side of the second connecting groove.

9. A reed relay movement according to claim 3, wherein: the second connecting part and the second leading-out pin on the second reed lead frame are connected and integrated through a second transition part, and the second connecting groove is formed by bending the second connecting part.

10. A reed relay movement according to claim 3, wherein: the first leading-out pin and the second leading-out pin are parallel to each other, and the first leading-out pin and the second leading-out pin are connected through a removable connecting material.

11. A reed relay, includes casing, its characterized in that: the reed relay core is arranged in the shell and fixedly connected with the shell, the leading-out feet on the two reed sheet lead frames extend out of the shell, two ends of the coil of the reed relay core are respectively and electrically connected with the two coil lead frames, one coil leading-out foot is arranged on each of the two coil lead frames, and the two coil leading-out feet extend out of the shell; the shell is fixedly connected with the reed switch core through injection molding; or the reed switch core is arranged in the shell and fixedly connected with the shell through an insulating sealing material.