CN212848231U

CN212848231U - Bistable safety relay

Info

Publication number: CN212848231U
Application number: CN202022147973.1U
Authority: CN
Inventors: 万雨生; 杜欣洋
Original assignee: Sanyou Corp Ltd
Current assignee: Sanyou Corp Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-03-30
Anticipated expiration: 2030-09-25

Abstract

The utility model provides a bistable safety relay, which comprises an electromagnetic device, a base and two contact units, wherein each contact unit is provided with a movable terminal and a fixed terminal, the movable terminal is aligned with the fixed terminal in the vertical direction, the electromagnetic device is arranged on the top surface of the base and is provided with an electromagnet and an armature, the electromagnet takes electricity from the outside, the two contact units are respectively arranged on both sides of the electromagnet, the armature is in a rod-shaped structure and moves up and down by taking the middle part as a rotating shaft point and is arranged on the side of the electromagnet, both ends of the armature are respectively provided with an armature component towards the side of the electromagnet, the end surface of the armature extends towards the contact units to be provided with a holding piece with a pressurizing part and a lifting part, the pressurizing part and the lifting part are respectively arranged above and below the movable terminal so as to drive the movable terminal to move up, the other movable terminal is separated from the fixed terminal. The utility model discloses can guarantee that the disconnection of movable terminal and fixed terminal is not influenced.

Description

Bistable safety relay

Technical Field

The utility model relates to a relay technical field mainly relates to a bistable safety relay.

Background

As shown in patent document No. 201880070568.7, the conventional relay includes: at least one contact unit including a fixed contact and a movable dome having a movable contact; an electromagnet including a coil and excited by a coil current flowing through the coil; an armature unit movable according to excitation of the electromagnet to allow the movable contact to move between a closed position contacting the fixed contact and an open position away from the fixed contact; and a base that holds the contact unit and the electromagnet on one surface side, the movable contact being placed between the base and the fixed contact along an arrangement direction in which the base and the electromagnet are arranged, the armature unit including a pressing portion that moves the movable contact by applying pressure to a surface of one side of the movable dome that faces the fixed contact.

In the conventional relay, the movable contact is moved by applying pressure to one side of the movable elastic sheet facing the fixed contact through the pressurizing part, but when the movable elastic sheet loses elasticity, the movable contact cannot be ensured to be contacted with the fixed contact so as to close a loop between the movable contact and the fixed contact, so that the opening operation of the relay is influenced, and a circuit where the relay is located cannot be protected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bistable safety relay makes it can guarantee that the disconnection of movable terminal and fixed terminal is not influenced.

To this end, a bistable safety relay is provided, comprising an electromagnetic device, a base, two contact units, each contact unit is provided with a movable terminal and a fixed terminal, one end of the fixed terminal is fixed on the top surface of the base and the other end is bent downwards, one end of the movable terminal is fixed on the top surface of the base and the middle part of the other end is bent, the movable terminal is aligned with the fixed terminal in the vertical direction, the electromagnetic device is arranged on the top surface of the base, the electromagnetic device is provided with an electromagnet and an armature, the electromagnet takes electricity from the outside, the two contact units are respectively arranged on two sides of the electromagnet, the armature is of a rod-shaped structure and is arranged on the side of the electromagnet, two ends of the armature can move up and down by taking the middle part of the armature as a rotating shaft point, two ends of the armature are respectively, the end face of the armature extends towards the contact unit to form a holding piece, the holding piece is provided with a pressurizing part and a lifting part, the pressurizing part and the lifting part are respectively arranged above and below the movable terminal so as to drive the movable terminal to move up and down, one movable terminal is in contact with the fixed terminal, and the other movable terminal is separated from the fixed terminal.

Furthermore, the middle part of the armature is provided with a rotating shaft parallel to the horizontal direction, two rotating shaft fixing plates are respectively arranged at two ends of the top surface of the base, which are aligned with the rotating shaft, and rotating grooves for embedding the end parts of the rotating shaft are formed in the tops of the two rotating shaft fixing plates.

Further, the electromagnet includes a coil and a core inserted into a middle portion of the coil, and both ends of the core protrude from both ends of the coil.

Further, the armature component comprises a permanent magnet and two armatures which are vertically overlapped and have gaps, the permanent magnet is arranged in the gaps of the two armatures and is respectively connected with one end of each armature, and the other end of each armature extends to the iron core extending out of the end of the coil and is respectively aligned to the upper side and the lower side of the iron core in the vertical direction.

Furthermore, a fixing net is arranged at the top of the armature aligned with the rotating shaft fixing plates, and two ends of the fixing net are fixedly connected with the tops of the two rotating shaft fixing plates respectively.

Furthermore, supporting plates are arranged between the electromagnet and the two contact units, grooves are formed in the positions, aligned with the pressurizing part and the lifting part, of the supporting plates, the size of each groove is similar to that of the pressurizing part and that of the lifting part, and the depth of each groove is similar to the moving height of the pressurizing part and that of the lifting part so as to enable the pressurizing part and the lifting part to move.

Furthermore, be provided with two elasticity pieces that reset on the fixed net, the one end of two elasticity pieces that reset is all fixed on the fixed net, and the other end of two elasticity pieces that reset faces two tip of armature respectively, and this end is less than the other end and sets up and support the top surface of armature.

Further, the armature and the armature component are integrally formed through injection molding.

Furthermore, the armature connected with the S pole of the permanent magnet is in an S pole, and the armature connected with the N pole of the permanent magnet is in an N pole.

Has the advantages that:

an object of the utility model is to provide a bistable safety relay, the middle part of armature is used at the both ends of armature and reciprocates and its terminal surface towards the contact unit as the pivot point, and the armature can keep one side contact unit closed and the disconnection of opposite side contact unit at the same time, sets up to have the splenium and lifts up the portion through the keeper with the armature both ends to guarantee that the disconnection of movable terminal and fixed terminal is not influenced.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic diagram of an explosive structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

fig. 3 is a side view of the present invention.

Description of reference numerals: 1-a base; 2-a contact unit; 4-a support plate; 5-a rotating shaft; 6-rotating shaft fixing plate; 21-a fixed terminal; 22-a movable terminal; 31-an electromagnet; 32-an armature unit; 311-iron core; 312-a coil; 321-an armature; 322-a holder; 323-an armature member; 3221-pressurization part; 3222-raised portion.

Detailed Description

The invention will be further described with reference to the following examples.

Referring to fig. 1 to 3, a bistable safety relay of the present embodiment includes two contact units 2, an electromagnetic device, and a base 1. Two contact units 2 are respectively arranged on two sides of the top surface of the base 1, each contact unit 2 comprises a fixed terminal 21 and a movable terminal 22, the fixed terminal 21 is specifically formed by a metal sheet, one end of the fixed terminal 21 is vertically and fixedly arranged on one side of the top surface of the base 1, and the other end of the fixed terminal 21 is bent downwards to be at a right angle with the other end, so that the whole fixed terminal 21 is L-shaped. The movable terminal 22 is an elastic metal sheet, a hole penetrating through the top surface and the bottom surface of the base 1 is formed on the base 1 horizontally symmetrical to the fixed terminal 21, the middle part of the movable terminal 22 is bent into an acute angle, one end of the movable terminal 22 passes through the hole from the upper part of the base 1 and is fixed on the base 1, and the other end of the movable terminal 22 extends to the lower part of the fixed terminal 21 and is aligned with the fixed terminal 21 in the vertical direction. In this embodiment, the operator can set the number of the contact units 2 to be plural according to actual needs.

The electromagnetic device includes an electromagnet 31 and an armature unit 32, the electromagnet 31 is disposed in the middle of the top surface of the base 1, the electromagnet 31 includes a coil 312 and an iron core 311 inserted into the middle of the coil 312, two ends of the iron core 311 extend out from two ends of the coil 312, the coil 312 takes power from the outside to generate a magnetic field, such that one end of the iron core 311 exposing the coil 312 is an "N" pole, and the other end of the iron core 311 exposing the coil 312 is an "S" pole. The armature unit 32 is formed by injection molding an armature 321 and two armature members 323, the two armature members 323 are respectively disposed at two ends of the armature 321, and the armature 321 is configured as a long rod and disposed beside the coil 312. The armature component 323 comprises two pieces of armatures 3231 which are overlapped up and down and have gaps, a permanent magnet 3232 is arranged in the gap of the two pieces of armatures 3231, the upper end of the permanent magnet 3232 is S-shaped, the lower end of the permanent magnet 3232 is N-shaped, the upper end and the lower end of the permanent magnet 3232 are respectively connected with one end of the two pieces of armatures 3231, the other end of the two pieces of armatures 3231 faces the side of the coil 312 and extends out of the armature 321, the S-shaped armature 3231 of the S-shaped pole of the permanent magnet 3232 is S-shaped, and the N-shaped armature 3231 of the N-shaped pole of the.

In order to realize the up-and-down movement of the two ends of the armature 321 and the limit of the armature 321, the middle of the armature 321 is provided with a rotating shaft 5 parallel to the horizontal direction, the top surface of the base 1 aligned with the two ends of the rotating shaft 5 of the armature 321 is respectively provided with a rotating shaft fixing plate 6, the top of the rotating shaft fixing plate 6 is provided with a rotating groove into which the end of the rotating shaft 5 can be embedded, after the two ends of the rotating shaft 5 are embedded into the rotating groove in the rotating shaft fixing plate 6, the two ends of the armature 321 can move up and down by taking the rotating shaft 5 as a rotating center, the up-and-down movement distance of the two ends of the armature 321 is a gap between two vertically overlapped armatures 3231, and one end of the armature 3231 facing the coil 312 respectively.

In order to realize that the electromagnet 31 attracts the armature 321 to move up and down, when the electromagnet 31 is energized, one end of the iron core 311 is made to be an "N" pole, and the other end is made to be an "S" pole, wherein one armature 3231 of one pair of the vertically stacked armatures 3231 which is made to be an "S" pole is attracted upwards by one end of the iron core 311 which is made to be an "N" pole, and one armature of the other pair of the vertically stacked armatures 3231 which is made to be an "N" pole is attracted downwards by one end of the iron core 311 which is made to be an "S" pole, so that one end of the armature 321 moves upwards and the other end moves downwards, and by transmitting currents in different directions to the electromagnet 31, the polarities of the two ends of the iron core 311 are changed along with the direction of the current passing through the electromagnet 31, and the vertically stacked armatures 3231 respectively arranged at the; even in the case where the electromagnet 31 is deenergized, the iron core 311 remains in the deenergized polarity, and any pair of the armatures 3231 stacked one above the other maintains the opposite polarity because the permanent magnets 3232 are disposed in the gaps thereof, thereby ensuring that the contact units 2 disposed on both sides of the base 1 are not simultaneously closed or opened. That is, after the contact unit 2 completes switching from the closed state to the open state or switching from the open state to the closed state, power supply to the permanent magnet 3232 can be stopped without changing the state of the contact unit 2, which has the effect of saving energy.

In order to ensure that only one of the contact units 2 is closed and the other contact unit 2 is opened at the same time on the base 1, the holding member 322 protruding toward the movable terminal 22 is provided on each of the two end surfaces of the armature 321, the holding member 322 includes a pressing portion 3221 and a lifting portion 3222, in any one of the holding members 322, one end of the pressing portion 3221 and one end of the lifting portion 3222 are fixed to the end of the armature 321, and a gap is provided between the pressing portion 3221 and the lifting portion 3222, and the movable terminal 22 is inserted into the gap. The supporting plate 4 is disposed on the top of the base 1, a groove is formed at a position where the supporting plate 4 is aligned with the retaining member 322, the width of the groove is similar to the width of the retaining member 322, and the depth of the groove is similar to the moving height of the pressing portion 3221 and the lifting portion 3222 for movement.

In use, the electromagnet 31 is energized to generate a magnetic field, the armature 3231 at one end of the armature 321 is attracted by the iron core 311 with opposite polarity to move downwards, so as to drive the pressing portion 3221 and the lifting portion 3222 arranged on the side holding piece 322 to move downwards, the pressing portion 3221 presses the movable terminal 22 downwards, the movable terminal 22 is separated from the fixed terminal 21, and the circuit between the movable terminal 22 and the fixed terminal 21 is broken; the armature 3231 at one end of the armature 321 is attracted by the iron core 311 with opposite polarity and moves upward, so that the pressing portion 3221 and the lifting portion 3222 arranged on the side holding member 322 are driven to move upward, the pressing portion 3221 lifts the movable terminal 22 upward, and the movable terminal 22 is brought into contact with the fixed terminal 21, so as to close the circuit between the movable terminal 22 and the fixed terminal 21.

Accordingly, the up-and-down movement of the armature 321 can separate or contact the movable terminal 22 and the fixed terminal 21, and the circuit between the movable terminal 22 and the fixed terminal 21 can be opened or closed.

Has the advantages that: when the movable terminal 22 is pressed down a plurality of times, the spring force is lost and the spring back is not easily generated, so that the movable terminal 22 cannot be brought into contact with the fixed terminal 21. In order to solve the problem, the present embodiment has the beneficial effect of ensuring that neither the separation nor the contact between the movable terminal 22 and the fixed terminal 21 is affected by the structure that the retainer 322 is provided with the pressing portion 3221 and the lifting portion 3222, compared with the structure that the movable spring 22 is pressed down to separate the movable terminal 22 from the fixed terminal 21 in the conventional relay which is provided with only one pressing structure.

Further, in order to fix the position of the armature 321, a fixing net is disposed on the top of the armature 321 aligned with the rotating shaft fixing plate 6, two ends of the fixing net are respectively fixedly connected with the tops of the two rotating shaft fixing plates 6, two elastic reset pieces are disposed on the fixing net, one ends of the two elastic reset pieces are both fixed on the fixing net, the other ends of the two elastic reset pieces respectively face two ends of the armature 321, and the end is lower than the other end and is disposed to abut against the top surface of the armature 321, the armature 321 on one side moves downward, and when the other side moves upward, one side of the armature 321 moving upward is pressed by the elastic reset pieces. When the direction of the current in the electromagnet 31 is changed, the elastic reset piece presses down one side of the armature 321 that moves upward, so that the side armature 321 is attracted by the cell with the changed polarity and moves downward.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A bistable safety relay comprises an electromagnetic device, a base and two contact units, wherein each contact unit is provided with a movable terminal and a fixed terminal, one end of each fixed terminal is fixed on the top surface of the base, the other end of each fixed terminal is bent downwards, one end of the movable terminal is fixed on the top surface of the base, the middle part of the other end is bent, the movable terminal is aligned with the fixed terminal in the vertical direction, the electromagnetic device is arranged on the top surface of the base, be provided with electromagnet and armature among the electromagnetic means, the electromagnet is got from the outside, and two contact units set up respectively in the both sides of electromagnet, and the armature is rod-shaped structure and sets up the side at the electromagnet, and the both ends of armature can use the middle part of armature to reciprocate as the pivot point, and the both ends of armature are provided with armature part respectively towards the side of electromagnet so that attract and reciprocate by the electromagnet after the circular telegram, its characterized in that: the end face of the armature extends towards the contact unit to form a holding piece, the holding piece is provided with a pressurizing part and a lifting part, the pressurizing part and the lifting part are respectively arranged above and below the movable terminal so as to drive the movable terminal to move up and down, one movable terminal is in contact with the fixed terminal, and the other movable terminal is separated from the fixed terminal.

2. The bistable safety relay according to claim 1, wherein the middle portion of the armature is provided with a rotating shaft parallel to the horizontal direction, two rotating shaft fixing plates are respectively arranged at two ends of the top surface of the base aligned with the rotating shaft, and the top portions of the two rotating shaft fixing plates are respectively provided with a rotating groove for the end portion of the rotating shaft to be inserted into.

3. The bistable safety relay of claim 1, wherein said electromagnet comprises a coil and a core inserted into the middle of the coil, and both ends of the core protrude from both ends of the coil.

4. The bistable safety relay according to claim 3, wherein said armature member comprises a permanent magnet and two pieces of armatures stacked one above the other and having a gap, the permanent magnet is disposed in the gap between the two pieces of armatures and connected to one end of the armatures, respectively, and the other end of the armatures extends toward the core extending from the coil end and is aligned above and below the core in the vertical direction, respectively.

5. The bistable safety relay according to claim 2, wherein a fixing net is disposed on the top of the armature aligned with the shaft fixing plates, and both ends of the fixing net are fixedly connected to the tops of the two shaft fixing plates, respectively.

6. The bistable safety relay of claim 1, wherein a support plate is disposed between the electromagnet and the two contact units, a groove is formed in the support plate at a position corresponding to the pressurization part and the lifting part, the size of the groove is similar to that of the pressurization part and the lifting part, and the depth of the groove is similar to the moving height of the pressurization part and the lifting part for movement.

7. The bistable safety relay of claim 5, wherein two elastic reset plates are disposed on the fixed net, one end of each of the two elastic reset plates is fixed on the fixed net, and the other end of each of the two elastic reset plates faces the two end portions of the armature, and the end is disposed lower than the other end and abuts against the top surface of the armature.

8. The bistable safety relay of claim 1, wherein said armature and armature components are integrally molded by injection molding.

9. The bistable safety relay of claim 4, wherein the armature connected to the S pole of the permanent magnet is S pole and the armature connected to the N pole of the permanent magnet is N pole.