CN112509873A - Relay with low impedance and high reliability - Google Patents

Abstract

The invention relates to the technical field of relays, and particularly discloses a relay with low impedance and high reliability, which comprises an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be switched on or off by means of electromagnetic acting force; the shielding piece is coated on the outer side of the electromagnet unit, and the protective piece covers the protective electromagnet unit, the contact unit and the shielding piece; the shielding piece comprises a cover body piece and a plate body piece, the cover body piece is U-shaped, two ends of the cover body piece are provided with two plate protrusions, and two ends of the plate body piece are provided with two clamping grooves for respectively accommodating the two plate protrusions; the protection piece comprises a shell piece and a shell plate piece, the cover body piece and the plate piece are respectively arranged on the shell piece and the shell plate piece, and the shell plate piece is used for encapsulating and covering the electromagnet unit, the contact unit, the cover body piece and the plate piece in the shell piece; by means of the structural design of the shielding piece, the electromagnetic unit is shielded in all directions, the external magnetic field is prevented from interfering the normal use of the electromagnetic unit, and the high reliability and stability of the relay are guaranteed.

Description

Relay with low impedance and high reliability

Technical Field

The invention relates to the technical field of relays, and particularly discloses a relay with low impedance and high reliability.

Background

The relay is one of the automatic switches commonly used for various product equipment, the kind of relay is various, for example, electromagnetic relay is one of the kind of relay commonly used, electromagnetic relay mainly includes relay main part and with relay main part complex other component, relay main part mainly relies on the electromagnetic force to realize switching on or off of relay, the structural design of prior art relay main part is unreasonable, prior art relay main part has set up U type shield shell, but external electromagnetic field still can make relay main part receive external electromagnetic interference and use badly on relay main part via the opening part effect of U type shield shell, can not satisfy trade actual demand.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the relay with low impedance and high reliability.

In order to achieve the purpose, the relay with low impedance and high reliability comprises an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be switched on or off by virtue of electromagnetic acting force; the shielding part covers the outer side of the electromagnet unit, and the protecting part covers the protective electromagnet unit, the contact unit and the shielding part; the shielding part comprises a cover body part and a plate body part matched with the cover body part, the cover body part is U-shaped, two ends of the cover body part are provided with two plate bulges, two ends of the plate body part are provided with two clamping grooves for respectively accommodating the two plate bulges, and the electromagnet unit is clamped between the plate body part and the cover body part; the protection piece comprises a shell piece and a shell plate piece detachably connected with the shell piece, the cover piece and the plate piece are respectively arranged on the shell piece and the shell plate piece, the shell piece is used for accommodating the electromagnet unit, the contact unit, the cover piece and the plate piece, and the shell plate piece is used for packaging and covering the electromagnet unit, the contact unit, the cover piece and the plate piece in the shell piece.

The cover body part comprises a base plate and two side plates formed by bending two ends of the base plate respectively, the two side plates are located on the same side of the base plate, the two side plates are arranged in parallel, the two plate protrusions are arranged at the free ends of the two side plates respectively, the width of each side plate is larger than that of each plate protrusion, and the plate body part is used for blocking the free ends of the side plates in abutting contact.

The shell part is provided with a blind groove and two penetrating grooves positioned in the blind groove, the penetrating grooves penetrate through the bottom wall of the blind groove, the base plate is positioned in the blind groove and is abutted and pressed on the bottom wall of the blind groove, and the two penetrating grooves are used for accommodating two side plates respectively.

The electromagnetic shielding device comprises a shielding piece, an armature unit and a magnetic unit, wherein the armature unit is located in the shielding piece, the armature unit comprises a first insulating piece, a permanent magnet and two armature pieces, the first insulating piece is rotatably arranged on the bottom wall of the blind groove, the permanent magnet is arranged on the first insulating piece, the two armature pieces are arranged in parallel, the N pole and the S pole of the permanent magnet respectively attract the two armature pieces, and the electromagnetic acting force of the electromagnet unit drives the armature unit to rotate so that the contact unit is switched on or switched off.

The electromagnet unit comprises an insulating framework, an iron core arranged in the insulating framework, a coil spirally wound outside the insulating framework and surrounding the iron core, and two yokes arranged at two ends of the iron core respectively, wherein the yokes are provided with matching parts, the matching parts of the two yokes extend into the space between the two armature parts at two ends of the armature unit respectively, two ends of the first insulating part, which are far away from each other, are provided with shaft bodies, and the shaft bodies at two ends of the first insulating part are rotatably arranged on the second insulating part and the shell part respectively; the second insulating part is provided with a first clamping protrusion, a second clamping protrusion and a third clamping protrusion which are arranged in a coplanar manner, the first clamping protrusion and the second clamping protrusion are arranged in parallel, the first clamping protrusion and the second clamping protrusion are used for clamping the matching part of one yoke, and the matching part of the other yoke is pressed on the third clamping protrusion; the first insulating piece is provided with a protruding part protruding out of the shielding piece, the protruding part acts on one end of an insulating push sheet, the other end of the insulating push sheet acts on the contact unit, and the third clamping protrusion and the protruding part are respectively positioned on two sides of the matching part of the other yoke.

The coil comprises an insulating framework, a shell plate part and two power supply pins, wherein the insulating framework is arranged on the insulating framework and extends out of the shell plate part; the shell plate part is provided with a positioning projecting pin inserted into an external circuit main board, and the two power supply conducting pins penetrate through the positioning projecting pin and are used for being welded on the circuit main board.

The shell part is provided with a first positioning column extending into the first positioning hole; the shell plate piece is provided with a second positioning hole for accommodating the second positioning column; the shell plate part is provided with a plurality of elastic buckling pieces, the shell part is provided with a plurality of bulges, the elastic buckling pieces are used for buckling the bulges respectively, and the bulges are arranged around the central axis of the shell part.

The contact unit comprises a movable spring and a static spring which are arranged in the shell piece, a partition board is arranged in the shell piece and is positioned between the contact unit and the shielding piece, the partition board is provided with a positioning blind groove used for accommodating the shielding piece, and the inner groove surface of the positioning blind groove stops and supports one side, away from the cover piece, of the contact plate piece; the static spring is provided with two static contacts, and the movable spring comprises a fixed conducting strip arranged on the shell part and an elastic reed arranged on the fixed conducting strip; the elastic reed comprises a first reed and a reinforcing reed, one end of the reinforcing reed is attached to one end of the first reed and fixedly arranged on the fixed conducting strip, the other end of the reinforcing reed is provided with two flat sheet bodies and a bending body positioned between the two flat sheet bodies, the two moving contacts are respectively arranged at the other end of the first reed and the two flat sheet bodies, the bending body is provided with an inclined sheet positioned between the two flat sheet bodies and two bending sheets arranged at the free end of the inclined sheet, the included angle between the inclined sheet and the flat sheet bodies is an acute angle, the included angle between the bending sheet and the inclined sheet is an obtuse angle, and the bending sheet is positioned between the inclined sheet and the other end of the first reed; when the moving contact contacts and conducts the static contact, the free end of the bending piece is abutted against and presses the other end of the first spring piece, so that the moving contact is pressed and held on the static contact.

The reinforcing reed is provided with a main reed body, the flat reed body and the inclined reed are respectively arranged on the main reed body, the flat reed body and the main reed body are arranged in a coplanar manner, and the inclined reed extends from the main reed body towards the direction far away from the first reed and the main reed body; the two bending pieces are respectively arranged on the left side and the right side of one end, far away from the main piece body, of the inclined piece, and the inclined piece is located between the two bending pieces.

The contact type spring comprises a first reed, a second reed, a movable contact and a reinforcing reed, wherein the first reed is clamped between the first reed and the reinforcing reed; the middle part of first reed, the middle part of second reed, the middle part of strengthening the reed all are equipped with semicircle arched arc piece, and the semicircle arched arc piece of first reed, the semicircle arched arc piece of second reed, the semicircle arched arc piece parallel arrangement of strengthening the reed, the semicircle arched arc piece of second reed is located the semicircle arched arc piece of first reed and strengthens between the semicircle arched arc piece of reed.

The invention has the beneficial effects that: in the use of relay, utilize shielding part cladding shielding electromagnet unit, utilize the protection part with the spacing assembly of shielding part together, avoid the shielding part to scatter, with the help of the structural design of shielding part, realize the all-round shielding to electromagnet unit, avoid external magnetic field to disturb electromagnet unit's normal use, guarantee the high reliable stability that the relay used.

Drawings

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

FIG. 2 is an exploded view of the present invention;

FIG. 3 is an exploded view of another aspect of the present invention;

FIG. 4 is a schematic view of the shielding element and the shielding element of the present invention after being hidden;

FIG. 5 is an exploded view of the shielding element and the shielding element according to the present invention;

FIG. 6 is a schematic perspective view of a movable spring according to the present invention;

FIG. 7 is an exploded view of the movable spring of the present invention;

fig. 8 is a perspective view of the reinforcing spring of the present invention.

The reference numerals include:

1-electromagnet unit 2-contact unit 3-cover element

4-plate body part 5-plate convex 6-clamping groove

7-housing part 8-housing plate part 9-base plate

11-side plate 12-blind groove 13-through groove

14-first positioning hole 15-second positioning column 16-elastic buckle piece

17-projection 18-first insulator 19-permanent magnet

21-armature member 22-insulating push piece 23-second insulating member

24-axle body 25-first snap projection 26-second snap projection

27-third snap 28-projection 29-power supply pin

31-positioning lug 32-movable spring 33-static spring

34-separator 35-static contact 36-fixed conducting strip

37-first reed 38-reinforcing reed 39-flat sheet body

41-moving contact 42-inclined plate 43-bent plate

44 main piece 45 second spring 46 semicircular arched arc piece

47-perforation slot 48-inverted buckle piece 49-first flat plate

51-second flat plate 52-inclined plate 53-guide hole.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

Referring to fig. 1 to 8, the relay with low impedance and high reliability of the present invention includes an electromagnet unit 1 and a contact unit 2, wherein the electromagnet unit 1 drives the contact 41 unit 2 to be turned on or off by an electromagnetic force; the electromagnetic unit further comprises a shielding piece and a protection piece, the shielding piece is coated on the outer side of the electromagnetic unit 1 and made of a magnetic conductive material, for example, the shielding piece is made of a metal material containing iron, cobalt or nickel, and the shielding piece is formed by cutting, bending and processing. The protection piece covers the protection electromagnet unit 1, the contact unit 2 and the shielding piece, is made of insulating plastics and is formed by injection molding through an injection mold.

The shielding part includes cover body 3 and with cover body 3 complex plate body spare 4, cover body 3 roughly is the U type, and cover body 3's both ends have two boards protruding 5, and cover body 3's both ends have a board protruding 5 respectively promptly, and board protruding 5 is located the free end of cover body 3 tip, and plate body 4's both ends have two draw-in grooves 6 that are used for holding respectively establishing two boards protruding 5, and 1 centre gripping of electro-magnet unit is between plate body 4 and cover body 3.

The protection piece comprises a shell piece 7 and a shell plate piece 8 detachably connected with the shell piece 7, the cover piece 3 and the plate piece 4 are respectively arranged on the shell piece 7 and the shell plate piece 8, the shell piece 7 is used for accommodating the electromagnet unit 1, the contact unit 2, the cover piece 3 and the plate piece 4, and the shell plate piece 8 is used for packaging and covering the electromagnet unit 1, the contact unit 2, the cover piece 3 and the plate piece 4 in the shell piece 7.

In the use of relay, utilize shielding part cladding shielding electromagnet unit 1, utilize the protection part with the spacing assembly of shielding part together, avoid the shielding part to scatter, with the help of the structural design of shielding part, realize the all-round shielding to electromagnet unit 1, avoid external magnetic field to disturb electromagnet unit 1's normal use, guarantee the high reliable stability that the relay used.

The cover body part 3 comprises a base plate 9 and two side plates 11 formed by bending two ends of the base plate 9 respectively, the two side plates 11 are located on the same side of the base plate 9, the two side plates 11 are arranged at intervals and in parallel, the two plate protrusions 5 are arranged on the free ends of the two side plates 11 respectively, the width of each side plate 11 is larger than that of each plate protrusion 5, and the plate body part 4 is used for blocking the free ends of the side plates 11.

In the installation process of the cover body piece 3 and the plate body piece 4, the limit plate protrusions 5 are stopped by means of the inner groove surfaces of the clamping grooves 6, so that on one hand, the cover body piece 3 and the plate body piece 4 are accurately installed together, and on the other hand, the cover body piece 3 is prevented from moving relative to the plate body piece 4. In the process of installing the cover body member 3 and the shell member 7, the plate body member 4 is utilized to stop the free end of the abutting side plate 11, so that the cover body member 3 and the shell member 7 are ensured to be assembled together quickly and accurately, and the assembling error of the cover body member 3 and the shell member 7 is avoided.

The shell member 7 is provided with a blind groove 12 and two penetrating grooves 13 positioned in the blind groove 12, the blind groove 12 is formed by the concave arrangement of the outer surface of the shell member 7, the penetrating grooves 13 are arranged on the bottom wall of the blind groove 12, the penetrating grooves 13 penetrate through the bottom wall of the blind groove 12, the base plate 9 is positioned in the blind groove 12 and is abutted and pressed on the bottom wall of the blind groove 12, and the two penetrating grooves 13 are used for respectively accommodating the two side plates 11.

In the process of mounting the shell member 7 and the cover member 3, the limit cover member 3 is stopped by the inner side surface of the blind groove 12, and the bottom wall of the blind groove 12 is stopped to abut against the cover member 3, so that the cover member 3 and the shell member 7 are rapidly and accurately mounted together. The two side plates 11 are limited by the two through grooves 13, so that the two side plates 11 are quickly and accurately assembled.

The side plate 11 is provided with a first positioning hole 14, and the shell member 7 is provided with a first positioning column extending into the first positioning hole 14; the first positioning column is stopped and limited by the inner hole surface of the first positioning hole 14, so that the cover body part 3 and the shell body part 7 are accurately installed together, the installation and assembly between the cover body part 3 and the shell body part 7 are simplified, and the assembly efficiency of the cover body part and the shell body part is improved.

The plate member 4 is provided with a second positioning column 15, and the shell plate member 8 is provided with a second positioning hole for accommodating the second positioning column 15; the second positioning column 15 is stopped and limited by the inner hole surface of the second positioning hole, so that the plate body 4 and the shell plate 8 are quickly and accurately installed together, and the installation alignment efficiency of the plate body and the shell plate is improved.

The shell plate member 8 has a plurality of elastic buckling pieces 16, the shell member 7 is provided with a plurality of protrusions 17, the plurality of elastic buckling pieces 16 respectively buckle the plurality of protrusions 17, and the plurality of protrusions 17 are arranged around the central axis of the shell member 7. Through the installation cooperation of a plurality of elasticity cramps 16 and a plurality of arch 17, guarantee on the one hand that shell plate spare 8, shell spare 7 are installed together firmly, on the other hand can realize both dismantlements with the help of the elastic deformation of elasticity cramp 16, promote both dismouting efficiency.

The relay further comprises an armature unit located in the shielding piece, the armature unit comprises a first insulating piece 18 rotatably arranged on the bottom wall of the blind groove 12, a permanent magnet 19 arranged on the first insulating piece 18 and two armature pieces 21, the armature pieces 21 are approximately rectangular flat plates, the two armature pieces 21 are arranged at intervals and in parallel, the permanent magnet 19 is clamped between the two armature pieces 21, the N pole and the S pole of the permanent magnet 19 respectively attract the two armature pieces 21, so that the two armature pieces 21 respectively present different polarities, and the armature unit is driven to rotate by the electromagnetic acting force of the electromagnet unit 1 to enable the contact unit 2 to be switched on or switched off.

When the electromagnet unit 1 is powered on, the electromagnet unit 1 generates magnetism, the magnetic force of the electromagnet unit 1 acts on the two armature pieces 21 of the armature unit, and the armature unit rotates relative to the housing member 7 under the magnetic action of the permanent magnet 19 on the two armature pieces 21, so that the rotating armature unit can drive the contact 41 assembly to be switched on or switched off.

The electromagnetic unit comprises an insulating framework, an iron core arranged in the insulating framework, a coil spirally wound outside the insulating framework and surrounding the iron core, and two yokes arranged at the left end and the right end of the iron core respectively, wherein each yoke is provided with a matching part which is flat, and the matching parts of the two yokes extend into the space between the two armature pieces 21 at the two ends of the armature unit respectively.

Both ends that first insulating member 18 kept away from each other all are equipped with the axis body 24, and the axis body 24 at first insulating member 18 both ends rotates respectively to set up on second insulating member 23 and on housing part 7, with the help of housing part 7, the plastics material characteristic of second insulating member 23, be convenient for on second insulating member 23, on housing part 7 high efficiency injection moulding shaft hole fast to make axis body 24 rotate and hold and establish in the shaft hole, promote the rotation installation effectiveness of first insulating member 18.

The second insulating member 23 has a first engaging protrusion 25, a second engaging protrusion 26 and a third engaging protrusion 27, which are disposed in a coplanar manner, the first engaging protrusion 25 and the second engaging protrusion 26 are disposed in parallel, the first engaging protrusion 25 and the second engaging protrusion 26 are used for clamping a mating portion of one yoke, and a mating portion of the other yoke is pressed and held on the third engaging protrusion 27.

By means of the structural design that the second clamping protrusions 26 and the third clamping protrusions 27 are arranged in a coplanar manner, the matching parts of the two yokes are arranged in a coplanar manner, and when the magnetic induction relay is in practical use, the matching parts of the two yokes extend into the space between the two armature pieces 21 at the left end and the right end of the armature unit respectively, so that the phenomenon that the yoke and the armature unit are not accurately contacted due to the fact that the matching parts of the two yokes are relatively staggered is avoided, the two armature pieces 21 of the armature unit can be ensured to accurately contact the matching parts of the two yokes, a magnetic induction line can circulate along the sequential direction of an iron core, one yoke, one armature piece 21, the permanent magnet 19, the other armature piece 21 and the other yoke, the circulation loop of the magnetic induction line is ensured, and the magnetic holding stability of the relay is ensured.

The first insulating member 18 is provided with a projection 28 projecting outside the shield, the projection 28 acting on one end of the insulating push piece 22, the other end of the insulating push piece 22 acting on the contact unit 2, and the third click projection 27, the projection 28 being located on either side of the engagement portion of the other yoke. By means of the arrangement of the protruding part 28, the insulating push sheet 22 is driven by the protruding part 28 to make the contact unit be conducted or disconnected, so that the iron core, the yoke, the coil, the permanent magnet 19 and the armature piece 21 are prevented from being exposed out of the shielding piece and being interfered by an external magnetic field, and the omnibearing electromagnetic shielding of the shielding piece on the electromagnet unit 1 and the armature unit is ensured.

The coil is characterized by further comprising two power supply pins 29 which are arranged on the insulating framework and extend out of the shell plate part 8, and two ends of the coil are respectively communicated with the two power supply pins 29; the housing plate member 8 has positioning pins 31 for inserting into the external circuit board, and the two power supply pins 29 penetrate the positioning pins 31 and are soldered to the circuit board.

The whole relay and the circuit main board are quickly and accurately installed by virtue of the structural design of the positioning projecting pins 31, the power supply guide pins 29 are limited by the positioning projecting pins 31, on one hand, the relay and the circuit main board are assembled with the circuit main board at one time, on the other hand, the power supply guide pins 29 are protected by virtue of the positioning projecting pins 31, and poor assembly caused by bending of the power supply guide pins 29 due to touch is reduced.

The contact unit 2 comprises a movable spring 32 and a static spring 33 which are arranged in the housing part 7, a partition 34 is arranged in the housing part 7, the partition 34 is positioned between the contact unit 2 and the shielding part, the contact unit 2 and the shielding part are separated by the partition 34, the partition 34 is provided with a positioning blind groove 12 for accommodating the shielding part, and the inner groove surface of the positioning blind groove 12 is blocked against one side of the contact plate part 4 far away from the housing part 3. Through the arrangement of the positioning blind grooves 12, the cover piece 3 and the plate body piece 4 are clamped and fixed together, and the shielding effect is prevented from being reduced due to the fact that the cover piece 3 and the plate body piece 4 are separated from each other.

The static spring 33 is provided with two static contacts 35, and the movable spring 32 comprises a fixed conducting strip 36 arranged on the housing part 7 and an elastic reed arranged on the fixed conducting strip 36; the elastic reed comprises a first reed 37 and a reinforcing reed 38, one end of the reinforcing reed 38 is attached to one end of the first reed 37 and fixedly arranged on the fixed conducting strip 36, the other end of the reinforcing reed 38 is provided with two flat sheet bodies 39 and a bending body positioned between the two flat sheet bodies 39, the two movable contacts 41 are respectively arranged on the other end of the first reed 37 and the two flat sheet bodies 39, the bending body is provided with an inclined sheet 42 positioned between the two flat sheet bodies 39 and two bending sheets 43 arranged on the free end of the inclined sheet 42, the included angle between the inclined sheet 42 and the flat sheet bodies 39 is an acute angle, the included angle between the bending sheets 43 and the inclined sheet 42 is an obtuse angle, and the bending sheet 43 is positioned between the inclined sheet 42 and the other end of the first reed 37; when the movable contact 41 contacts and conducts the stationary contact 35, the free end of the bent piece 43 abuts against and presses the other end of the first spring 37, so that the movable contact 41 is pressed on the stationary contact 35.

When the electromagnet unit 1 drives the movable spring 32 to move so that the movable contact 41 contacts and conducts the fixed contact 35, the insulating push piece 22 drives the first spring piece 37 and the reinforcing spring piece 38 and elastically deforms the bending body, so that the free end of the bending piece 43 of the bending body is pressed against the other end of the first spring piece 37, the movable contact 41 and the fixed contact 35 are stably contacted and conducted together by virtue of the elastic restoring force of the bending body, the movable contact 41 and the fixed contact 35 are prevented from being separated from each other due to external vibration or accidental touch, and the stability of the use performance of the relay is ensured.

The reinforcing reed 38 is provided with a main body 44, a flat body 39 and an inclined piece 42 are respectively arranged at the same end of the main body 44, the flat body 39 and the main body 44 are arranged in a coplanar manner, and the inclined piece 42 extends from the main body 44 towards the direction far away from the first reed 37 and the main body 44; in actual use, the reinforcing spring piece 38 is formed by processing and bending the same material sheet, so that the structural consistency of the reinforcing spring piece 38 is ensured, and the manufacturing efficiency of the reinforcing spring piece 38 is improved.

The two bending pieces 43 are respectively arranged at the left and right sides of one end of the inclined piece 42 far away from the main body 44, and the inclined piece 42 is positioned between the two bending pieces 43. In actual use, the bending pieces 43 are formed by directly bending the free ends of the inclined pieces 42, so that the manufacturing efficiency of the bending pieces 43 is improved, and the two bending pieces 43 are ensured to be used without interference.

The contact device further comprises a second reed 45, wherein the second reed 45 is clamped between the first reed 37 and the reinforcing reed 38, one end of the first reed 37, one end of the second reed 45 and one end of the reinforcing reed 38 are fixedly arranged on the fixed conducting strip 36, and the movable contact 41 is arranged on the other end of the first reed 37, the other end of the second reed 45 and the flat sheet body 39; through addding second reed 45, increase the intensity of double contact reed structure self on the one hand, avoid double contact reed structure to take place to warp because of the intensity is low easily, guarantee the stability of double contact reed structure self use. On the other hand, the second spring 45 ensures that the double-contact spring structure can be quickly and sufficiently reset, and the separation efficiency of the movable contact 41 and the fixed contact 35 is improved.

The middle part of the first reed 37, the middle part of the second reed 45 and the middle part of the reinforcing reed 38 are all provided with semicircular arched arc pieces 46, the semicircular arched arc pieces 46 of the first reed 37, the semicircular arched arc pieces 46 of the second reed 45 and the semicircular arched arc pieces 46 of the reinforcing reed 38 are arranged in parallel, and the semicircular arched arc pieces 46 of the second reed 45 are positioned between the semicircular arched arc pieces 46 of the first reed 37 and the semicircular arched arc pieces 46 of the reinforcing reed 38.

Through the structural arrangement of the semicircular arched arc piece 46, the lengths of the reeds and the reeds are increased in a direction-changing manner, the elastic performance of the double-contact reed structure is improved, the elastic deformation capacity of the double-contact reed structure is improved under the condition that the self strength of the double-contact reed structure is ensured, and when the movable contact 41 is in contact conduction with the static contact 35, the movable contact 41 can roll relative to the static contact 35 by virtue of the elastic deformation of the double-contact reed structure, so that the stable contact conduction of the movable contact 41 and the static contact 35 is ensured.

The middle part of the first spring 37, the middle part of the second spring 45 and the middle part of the reinforcing spring 38 are all provided with a perforation slot 47, the perforation slot 47 penetrates through the semicircular arched arc 46 along the length direction of the semicircular arched arc 46, the two movable contacts 41 are respectively positioned at two sides of the perforation slot 47 of the first spring 37, and the two movable contacts 41 are respectively positioned at two sides of the perforation slot 47 of the second spring 45.

Through the arrangement of the perforation slot 47, on one hand, the strength of the double-contact reed structure is reduced in an auxiliary manner, and the double-contact reed structure can be ensured to be fully elastically deformed; on the other hand, the perforated slot 47 is used to assist in separating the current transmission between the two moving contacts 41 and the two stationary contacts 35, thereby ensuring the stability of signal transmission between the two moving contacts 41.

Along the longitudinal direction of the reinforcing spring 38, the through-hole slit 47 of the reinforcing spring 38 and the flat piece 39 are spaced apart from each other, and the through-hole slit 47 of the reinforcing spring 38 and the bent piece are spaced apart from each other. Compared with the structure that the through-hole slot 47 extends to the bending body, the strength of the bending body is prevented from being reduced, the bending body can be ensured to be abutted against the other end of the spring fully and stably, the problem that the spring force applied to the spring is insufficient due to the fact that the strength of the bending body is lowered is avoided, and the bending body can be ensured to be abutted against the spring fully and stably so that the movable contact 41 and the static contact 35 can be kept in stable contact conduction.

The insulation push piece 22 is arranged on the first reed 37, the insulation push piece 37 is arranged on the other end of the first reed 37, the reverse buckling piece 48 is formed by bending the first reed 37, the reverse buckling piece 48 and the reinforcing reed 38 are respectively located on two sides of the first reed 37, and the reverse buckling piece 48 is used for stopping the insulation push piece 22 from falling off from the first reed 37. After the insulating push piece 22 is installed and matched with the double-contact reed structure, the inverted buckle piece 48 stops and abuts against the insulating push piece 22, so that the insulating push piece 22 is prevented from falling off from the double-contact reed structure, and the insulating push piece 22 and the double-contact reed structure are stably installed together.

The fixed conductive plate 36 includes a first flat plate 49, a second flat plate 51, and an inclined plate 52 connecting the first flat plate 49 and the second flat plate 51, the first flat plate 49 and the second flat plate 51 are disposed in parallel, the first flat plate 49 is located between the reinforcing spring 38 and the second flat plate 51, and one end of the first spring 37, one end of the second spring 45, and one end of the reinforcing spring 38 are all riveted to the first flat plate 49 via riveting columns.

The second plate 51 is provided with a guide hole 53 penetrating through the second plate 51, and the insulation push sheet 22 is movably accommodated in the guide hole 53. By means of the arrangement of the guide hole 53, on one hand, the insulation push piece 22 is ensured to move along the correct direction, and on the other hand, the insulation push piece 22 is stopped and limited by means of the inner hole surface of the guide hole 53, so that the poor use of the insulation push piece 22 due to the movement is prevented.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A relay with low impedance and high reliability comprises an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be switched on or off by means of electromagnetic acting force; the method is characterized in that: the shielding part covers the outer side of the electromagnet unit, and the protecting part covers the protective electromagnet unit, the contact unit and the shielding part; the shielding part comprises a cover body part and a plate body part matched with the cover body part, the cover body part is U-shaped, two ends of the cover body part are provided with two plate bulges, two ends of the plate body part are provided with two clamping grooves for respectively accommodating the two plate bulges, and the electromagnet unit is clamped between the plate body part and the cover body part; the protection piece comprises a shell piece and a shell plate piece detachably connected with the shell piece, the cover piece and the plate piece are respectively arranged on the shell piece and the shell plate piece, the shell piece is used for accommodating the electromagnet unit, the contact unit, the cover piece and the plate piece, and the shell plate piece is used for packaging and covering the electromagnet unit, the contact unit, the cover piece and the plate piece in the shell piece.

2. The low impedance, high reliability relay of claim 1, wherein: the cover body piece comprises a base plate and two side plates formed by bending two ends of the base plate respectively, the two side plates are located on the same side of the base plate, the two side plates are arranged in parallel, the two plate protrusions are arranged at the free ends of the two side plates respectively, the width of each side plate is larger than that of the corresponding plate protrusion, and the plate body piece is used for blocking the free ends of the side plates in abutting contact.

3. The low impedance, high reliability relay of claim 2, wherein: the shell part is provided with a blind groove and two penetrating grooves positioned in the blind groove, the penetrating grooves penetrate through the bottom wall of the blind groove, the base plate is positioned in the blind groove and is abutted and pressed on the bottom wall of the blind groove, and the two penetrating grooves are used for accommodating two side plates respectively.

4. The low impedance, high reliability relay of claim 3, wherein: the electromagnetic contact device is characterized by further comprising an armature unit located in the shielding piece, wherein the armature unit comprises a first insulating piece, a permanent magnet and two armature pieces, the first insulating piece is rotatably arranged on the bottom wall of the blind groove, the permanent magnet is arranged on the first insulating piece, the two armature pieces are arranged in parallel, the N pole and the S pole of the permanent magnet respectively attract the two armature pieces, and the armature unit is driven to rotate by the electromagnetic acting force of the electromagnet unit so that the contact unit is switched on or switched off.

5. The low impedance, high reliability relay of claim 4, wherein: the electromagnet unit comprises an insulating framework, an iron core arranged in the insulating framework, a coil spirally wound outside the insulating framework and surrounding the iron core, and two yokes arranged at two ends of the iron core respectively, wherein the yokes are provided with matching parts, the matching parts of the two yokes extend into the space between the two armature parts at two ends of the armature unit respectively, shaft bodies are arranged at two ends of the first insulating part, which are far away from each other, and the shaft bodies at two ends of the first insulating part are rotatably arranged on the second insulating part and the shell part respectively; the second insulating part is provided with a first clamping protrusion, a second clamping protrusion and a third clamping protrusion which are arranged in a coplanar manner, the first clamping protrusion and the second clamping protrusion are arranged in parallel, the first clamping protrusion and the second clamping protrusion are used for clamping the matching part of one yoke, and the matching part of the other yoke is pressed on the third clamping protrusion; the first insulating piece is provided with a protruding part protruding out of the shielding piece, the protruding part acts on one end of an insulating push sheet, the other end of the insulating push sheet acts on the contact unit, and the third clamping protrusion and the protruding part are respectively positioned on two sides of the matching part of the other yoke.

6. The low impedance, high reliability relay of claim 5, wherein: the coil is characterized by also comprising two power supply pins which are arranged on the insulating framework and extend out of the shell plate part, and two ends of the coil are respectively communicated with the two power supply pins; the shell plate part is provided with a positioning projecting pin inserted into an external circuit main board, and the two power supply conducting pins penetrate through the positioning projecting pin and are used for being welded on the circuit main board.

7. The low impedance, high reliability relay of claim 2, wherein: the side plate is provided with a first positioning hole, and the shell part is provided with a first positioning column extending into the first positioning hole; the shell plate piece is provided with a second positioning hole for accommodating the second positioning column; the shell plate part is provided with a plurality of elastic buckling pieces, the shell part is provided with a plurality of bulges, the elastic buckling pieces are used for buckling the bulges respectively, and the bulges are arranged around the central axis of the shell part.

8. The low impedance, high reliability relay of claim 1, wherein: the contact unit comprises a movable spring and a static spring which are arranged in the shell piece, a partition board is arranged in the shell piece and is positioned between the contact unit and the shielding piece, the partition board is provided with a positioning blind groove used for accommodating the shielding piece, and the inner groove surface of the positioning blind groove stops and abuts against one side, away from the cover piece, of the contact plate piece; the static spring is provided with two static contacts, and the movable spring comprises a fixed conducting strip arranged on the shell part and an elastic reed arranged on the fixed conducting strip; the elastic reed comprises a first reed and a reinforcing reed, one end of the reinforcing reed is attached to one end of the first reed and fixedly arranged on the fixed conducting strip, the other end of the reinforcing reed is provided with two flat sheet bodies and a bending body positioned between the two flat sheet bodies, the two moving contacts are respectively arranged at the other end of the first reed and the two flat sheet bodies, the bending body is provided with an inclined sheet positioned between the two flat sheet bodies and two bending sheets arranged at the free end of the inclined sheet, the included angle between the inclined sheet and the flat sheet bodies is an acute angle, the included angle between the bending sheet and the inclined sheet is an obtuse angle, and the bending sheet is positioned between the inclined sheet and the other end of the first reed; when the moving contact contacts and conducts the static contact, the free end of the bending piece is abutted against and presses the other end of the first spring piece, so that the moving contact is pressed and held on the static contact.

9. The low impedance, high reliability relay of claim 8, wherein: the reinforcing reed is provided with a main reed body, a flat reed body and an inclined reed are respectively arranged on the main reed body, the flat reed body and the main reed body are arranged in a coplanar manner, and the inclined reed extends from the main reed body towards the direction far away from the first reed and the main reed body; the two bending pieces are respectively arranged on the left side and the right side of one end, far away from the main piece body, of the inclined piece, and the inclined piece is located between the two bending pieces.

10. The low impedance, high reliability relay of claim 8, wherein: the contact spring is characterized by also comprising a second reed, wherein the second reed is clamped between the first reed and the reinforcing reed, one end of the first reed, one end of the second reed and one end of the reinforcing reed are all arranged on the fixed conducting strip, and the moving contact is arranged at the other end of the first reed, the other end of the second reed and the flat sheet body; the middle part of first reed, the middle part of second reed, the middle part of strengthening the reed all are equipped with semicircle arched arc piece, and the semicircle arched arc piece of first reed, the semicircle arched arc piece of second reed, the semicircle arched arc piece parallel arrangement of strengthening the reed, the semicircle arched arc piece of second reed is located the semicircle arched arc piece of first reed and strengthens between the semicircle arched arc piece of reed.

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