CN212587410U

CN212587410U - Large-load reed pipe structure

Info

Publication number: CN212587410U
Application number: CN202022003119.8U
Authority: CN
Inventors: 杨东峰; 苟涛
Original assignee: Jiaxing Hongyu Technology Co Ltd
Current assignee: Jiaxing Hongyu Technology Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-02-23
Anticipated expiration: 2030-09-14

Abstract

The invention belongs to the technical field of reed pipes, in particular to a large-load reed pipe structure which comprises a glass pipe, and a short pipe pin and a long pipe pin which are packaged at two ends of the glass pipe, wherein the short pipe pin and the long pipe pin are hermetically connected with the glass pipe, one end of the short pipe pin extending into the glass pipe is provided with a pole shoe, and the pole shoe and the short pipe pin are integrally formed; the design adopts a design structure of separating a magnetic circuit from a circuit, and adopts a high-conductivity reed to reduce the on-resistance of the circuit, so that the resistance heating of large load current is reduced, and the magnetic circuit demagnetization is caused to cause unreliable switching action; by adopting the clapper type armature magnetic circuit structure, the armature can generate actuation action under the action of a magnetic field, the inherent elastic restoring counter force of the magnetic reed of the traditional reed switch is eliminated, and the restoring counter force required by breaking the contact is independently provided by the copper alloy elastic conductive reed, so that conditions are created for increasing the sectional area of the circuit copper alloy elastic reed and reducing the circuit resistance.

Description

Large-load reed pipe structure

Technical Field

The invention belongs to the technical field of reed pipes, and particularly relates to a large-load reed pipe structure.

Background

A magnetic reed switch is also called a reed switch, and is an electric switch operated by an applied magnetic field, the basic type is that two magnetic reeds are sealed in a glass tube, although the two magnetic reeds are overlapped, a small air gap is arranged between the two magnetic reeds, when the external magnetic field is applied, the two magnetic reeds are attracted and contacted, current flows through the magnetic reeds to realize contact connection, once the magnetic field is far away from the switch or disappears, the magnetic reeds recover to an initial state under the action of self elastic counter force, the overlapped part of the two magnetic reeds forms the air gap again, and the contact disconnection is realized, so that a circuit is disconnected. Therefore, the traditional reed switch belongs to a structure that a magnetic circuit and a circuit are combined into a whole. The magnetic reed switch has a simple working principle, two soft magnetic sealing alloy reeds (generally composed of two metals of iron and nickel) overlapped at the end points are sealed in a glass tube, the two reeds are overlapped and are spaced by a small section of air gap (only about dozens to hundreds of micrometers), the contacts on the two reeds are plated with hard noble metals, generally rhodium and ruthenium, the hard noble metal of the layer greatly prolongs the switching life and improves the contact reliability, the glass tube is filled with high-purity inert gas, and part of dry reed switches can be made into a high-vacuum state in order to improve the high-voltage performance of the dry reed switches.

The reed switch is used as a core part of a magnetic control proximity switch (a magnetic control sensor) and a reed relay, and is widely applied to various fields of household appliances, transportation equipment, monitoring equipment, aerospace, national defense and the like due to the characteristics of simple and reliable structure, good adaptability and safety of contact airtight environment and long service life. The large-load reed switch and the reed relay are switch elements which are ideal for electrical control systems of equipment such as short-wave communication and electric trains and explosion-proof electrical appliances, and when the traditional reed switch is connected with large-load current, the current can easily heat the reed to cause high-temperature demagnetization of a magnetic circuit and unreliable attraction contact due to high-temperature demagnetization of the magnetic circuit because the resistivity of the soft magnetic reed is high.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides a large-load reed pipe structure to solve the problems.

In order to achieve the above purpose, the present invention provides a technical solution of separating a magnetic circuit and an electric circuit. The specific technical scheme is as follows: a large-load reed switch structure comprises a glass tube, a short tube pin and a long tube pin, wherein the short tube pin and the long tube pin are packaged at two ends of the glass tube, the short tube pin and the long tube pin are hermetically connected with the glass tube, one end, extending into the glass tube, of the short tube pin is provided with a pole shoe, the pole shoe and the short tube pin are integrally formed, a static reed is installed on the pole shoe, one end of the static reed is fixedly riveted with the pole shoe, the other end of the static reed is fixedly provided with a static contact, one end, extending into the short tube pin, of the long tube pin is provided with a U-shaped magnetic pole, the U-shaped magnetic pole and the long tube pin are integrally formed, one end of a movable reed is fixedly riveted with the long tube pin, the other end of the movable reed is fixedly riveted on an armature by means of the tail of the movable contact, the inherent elastic, meanwhile, a contact gap is formed between the fixed contact and the movable contact, and the other end of the fixed contact is in contact with the U-shaped magnetic pole to form a clapper type structure of a rotating hinge, so that the armature can rotate around the U-shaped magnetic pole under the action of a magnetic field, and the movable contact is driven to move to realize the closing and opening actions with the fixed contact.

Preferably, rivets are arranged between the pole shoe and the static reed, and between the long pipe foot and the movable reed, and are riveted and fixed through the rivets.

Preferably, the movable spring leaf and the static spring leaf are elastic copper alloy spring leaves.

Preferably, the contact surface of the static contact and the static reed is a silver alloy contact.

Preferably, the magnetic pole is of a U-shaped structure, so that a clapper magnetic circuit structure is formed between the pole shoe and the armature, and the movable spring generates a restoring counter force.

Preferably, the movable spring and the armature are fixed by riveting the tail of the movable contact.

Preferably, the short pipe pin and the long pipe pin are both soft magnetic glass sealing alloy structures, and the short pipe pin and the long pipe pin are respectively sealed with two ends of the glass tube in a melting way.

Preferably, the glass tube is a glass tube or a ceramic tube.

Compared with the prior art, the invention has the beneficial effects that:

1. the magnetic circuit is separated from the circuit, and the contact and the reed generate heat when the large load current is greatly reduced compared with the common reed switch, so that the magnetic circuit is demagnetized to cause unreliable adverse effects.

2. The copper alloy reed is adopted for conducting, and the resistivity of the copper alloy reed is far lower than that of common reed pipe kovar alloy, so that the reed pipe can conduct and switch loads with larger current.

3. The composite contact is used, the thickness of the silver alloy is not less than 0.1mm, the contact of the common reed switch is a precious metal coating with the thickness of only about 1um, and the resistance of the contact to electric burning loss is far inferior to that of the contact, so that the contact has the capability of switching with large load current.

4. By adopting the clapper type armature magnetic circuit structure, the elastic counter force of a soft magnetic reed of a common reed switch is eliminated, the magnetic circuit efficiency is improved, the action range of the armature of the magnetic circuit is larger, but the action AT value of the reed switch is not increased, the contact gap is favorably increased, and the withstand voltage and the current breaking capacity of the contact are improved.

5. The movable reed and the static reed adopt an elastic copper alloy belt with high elasticity and high conductivity verified by the relay industry to provide contact recovery counter force and overtravel, and the performance of the movable reed and the static reed is more stable and better than that of a common reed pipe Kovar reed.

6. The structure has the advantages of simple and reliable dry reed structure and large load capacity of the power relay.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the present invention.

In the figure: 1. short pins; 11. a pole shoe; 2. a glass tube; 3. an armature; 4. a movable contact; 5. a movable spring plate; 6. riveting; 7. a long pin; 71. a U-shaped magnetic pole; 8. a stationary contact; 9. and (5) a static reed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides the following technical solutions: a large-load reed switch structure comprises a glass tube 2, a short tube pin 1 and a long tube pin 7 which are packaged at two ends of the glass tube 2, wherein the short tube pin 1 and the long tube pin 7 are hermetically connected with the glass tube 2, one end of the short tube pin 1 extending into the glass tube 2 is provided with a pole shoe 11, the pole shoe 11 and the short tube pin 1 are integrally formed, the pole shoe 11 is provided with a static reed 9, one end of the static reed 9 is riveted and fixed with the pole shoe 11, the other end of the static reed is fixedly provided with a static contact 8, one end of the long tube pin 7 extending into the short tube pin 1 is provided with a hinge 71, a U-shaped magnetic pole 71 and the long tube pin 7 are integrally formed, the long tube pin 7 is riveted and fixed with one end of a movable reed 5, the other end of the movable reed 5 is riveted and fixed on an armature 3 by means of the tail part of the movable contact 4, the inherent elastic acting force of the bending structure of the movable reed 5 enables one end of the, and the other end of the magnetic pole contacts with the U-shaped magnetic pole 71 to form a clapper type structure of a rotating hinge, so that the armature 3 can rotate around the U-shaped magnetic pole 71 under the action of a magnetic field, and the movable contact 4 is driven to move to realize the closing and opening actions with the fixed contact 8.

In this embodiment, the short pin 1 is riveted with a rivet 6 to a stationary spring plate 9 and a stationary contact 8 is mounted thereon. The long pin 7 is riveted with the movable spring 5 by a rivet 6, and the movable contact 4 rivets the movable spring 5 and the armature 3 into a whole. A section of the long pin 7 in the glass tube 2 is bent into a U-shaped magnetic pole 71 to be lapped with the armature 3 to form an armature 3 rotating action hinge of a clapper type magnetic circuit structure, the contact part of the hinge can enable the armature 3 to be always contacted with the long pin 7, namely the hinge can keep the stable position under the vibration and impact conditions, and can also enable a working air gap formed by the armature 3 and a pole shoe 11 at one end in the glass tube 2 of the short pin 1 to be a unique gap in a magnetic circuit, so that the magnetic circuit reluctance is reduced, the magnetic circuit efficiency is improved, the movable spring 5 and the fixed spring 9 are elastic copper alloy springs, the movable contact 4 and the fixed contact 8 are contacts with the contact surface made of silver alloy, when the reed pipe is in a magnetic field, a magnetic field flowing through the magnetic field in the magnetic circuit generates suction at the air gap between the pole shoe 11 and the armature 3 to enable the armature 3 to rotate along the hinge, the movable contact 4 is driven to move by the movable spring 5, and when the movable, the counter force is increased along with the increase of the deformation of the static reed 9 to reduce the rotating linear speed of the armature 3, thereby achieving the purposes of reducing the collision energy when the armature 3 and the pole shoe 11 are completely attracted and reducing the probability of the fracture of the sealing part of the long pin 7 and the glass tube 2.

Specifically, rivets 6 are arranged between the pole shoe 11 and the static reed 9, and between the long pipe foot 7 and the movable reed 5, and are riveted and fixed through the rivets 6, so that the stability of the connecting mechanism is improved.

Specifically, the movable reed 5 and the static reed 9 are elastic copper alloy reeds, the movable reed 5 and the static reed 9 adopt a copper alloy elastic copper strip with high elasticity and high conductivity verified by the relay industry to provide contact restoration counterforce and overstroke, and the performance is more stable and better than that of a common reed pipe kovar reed.

Specifically, the contact surface of the static contact 8 and the static reed 9 is a silver alloy contact, the silver alloy thickness of the composite contact is not less than 0.1mm, the contact of the common reed pipe is a precious metal coating with the thickness of only about 1um, and the electric burning resistance of the contact is far inferior to that of the contact, so that the contact has the capacity of switching with large load current.

Specifically, a clapper structure is formed between the U-shaped magnetic pole 71 and the armature 3, the armature 3 can be always contacted with the U-shaped magnetic pole 71 by the elastic acting force of the movable spring 5, so that the position stability of the armature under vibration and impact conditions can be kept, a working air gap formed by the armature 3 and a pole shoe 11 at one end inside the short pin 1 glass tube 2 can be a unique gap in a magnetic circuit, the magnetic resistance of the magnetic circuit is reduced, and the efficiency of the magnetic circuit is improved.

Specifically, the short tube pin 1 and the long tube pin 7 are both soft magnetic glass sealing alloy structures, the short tube pin 1 and the long tube pin 7 are respectively sealed with two ends of the glass tube 2 in a melting and sealing mode, and the glass tube 2 is a glass tube or a ceramic tube, so that the structural strength and the sealing performance of the reed switch can be guaranteed.

The working principle and the using process of the invention are as follows: after the invention is installed, when the reed pipe is in a magnetic field, the magnetic field flowing through the magnetic field in the magnetic circuit generates attraction at the air gap between the pole shoe 11 and the armature 3 to enable the armature 3 to rotate along the U-shaped magnetic pole 71 hinge, the movable contact 4 is driven to move by the movable spring 5, when the movable contact 4 is contacted with the fixed contact 8, the movable contact 8 is pushed to move to enable the fixed spring 9 to start to deform to generate counterforce, and the counterforce increases with the increase of the deformation of the fixed spring 9 to reduce the rotating linear speed of the armature 3, thereby achieving the purposes of reducing the collision energy when the armature 3 and the pole shoe 11 are completely attracted and reducing the probability of the fracture of the sealing part of the long pin 7 and the.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-load dry reed pipe structure is characterized in that: comprises a glass tube (2) and a short pin (1) and a long pin (7) which are packaged at two ends of the glass tube (2), wherein the short pin (1) and the long pin (7) are both connected with the glass tube (2) in a sealing way, one end of the short pin (1) extending into the glass tube (2) is provided with a pole shoe (11), the pole shoe (11) and the short pin (1) are integrally formed, a static reed (9) is installed on the pole shoe (11), one end of the static reed (9) is riveted and fixed with the pole shoe (11), the other end of the static reed (8) is fixedly installed with a static contact (8), the long pin (7) extends into a U-shaped magnetic pole (71) at one end of the glass tube (2), the magnetic pole (71) and the long pin (7) are integrally formed, one end of a movable reed (5) is riveted and fixed on an armature (3) by the tail part of the movable contact (4), the inherent elastic acting force of the bending structure of the movable spring (5) enables one end of the armature (3) to upwarp to form a magnetic circuit working air gap, meanwhile, a contact gap is formed between the fixed contact (8) and the movable contact (4), the other end of the armature is in contact with the U-shaped magnetic pole (71) to form a clapper type structure of a rotary hinge, the armature (3) can rotate around the U-shaped magnetic pole (71) under the action of a magnetic field, and therefore the movable contact (4) is driven to move to achieve closing and opening actions with the fixed contact (8).

2. A heavy duty reed pipe structure as in claim 1, wherein: the pole shoe (11) and the static spring (9), the long pipe foot (7) and the movable spring (5), and the movable spring (5) and the armature (3) are riveted and fixed.

3. A heavy duty reed pipe structure as in claim 1, wherein: the movable reed (5) and the static reed (9) are elastic copper alloy reeds, and provide contact reset counter force and contact overtravel for the reed pipe.

4. A heavy duty reed pipe structure as in claim 1, wherein: the contact surface of the static contact (8) and the static reed (9) is a silver alloy contact.

5. A heavy duty reed pipe structure as in claim 1, wherein: the magnetic pole (71) is of a U-shaped structure, so that a clapper type magnetic circuit structure is formed between the long pin (7) and the armature (3).

6. A heavy duty reed pipe structure as in claim 1, wherein: the short pin (1) and the long pin (7) are both soft magnetic sealing alloy structures, and the short pin (1) and the long pin (7) are respectively sealed with the two ends of the glass tube (2) in a melting and sealing manner.

7. A heavy duty reed pipe structure as in claim 1, wherein: the glass tube (2) is a glass tube or a ceramic tube.