CN219246601U

CN219246601U - Small-sized intermediate relay

Info

Publication number: CN219246601U
Application number: CN202223282117.2U
Authority: CN
Inventors: 钱益文; 温启洪; 周干善; 颜业海
Original assignee: NINGBO JINHAI ELECTRONIC CO Ltd
Current assignee: Zhejiang Hongfa Industrial Automation Control Electronics Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-06-23
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a small-sized intermediate relay, which comprises a magnetic circuit part, a contact part and an arc isolation piece, wherein the magnetic circuit part is isolated from the contact part through the arc isolation piece; the magnetic circuit part comprises a coil frame and a coil arranged on the coil frame; the contact part comprises a base and a plurality of static spring groups arranged on the base, and the coil rack is fixedly arranged on the base; the arc isolation piece comprises a mounting part and a plurality of arc isolation parts, wherein the mounting part comprises a vertical side plate and a bottom side plate which are bent, the arc isolation parts are arranged on one side of the vertical side plate, which is away from the bottom side plate, in parallel, the arc isolation parts are arranged between two static spring groups, the bottom side plate is arranged between the coil rack and the base in a limiting manner, and the vertical side plate is arranged between the static spring groups and the coil rack. The utility model has the advantages of compact and small integral structure, longer creepage distance, ensured arc isolation and insulation effects and better pressure resistance.

Description

Small-sized intermediate relay

Technical Field

The utility model relates to the technical field of relays, in particular to a small-sized intermediate relay.

Background

The small-sized intermediate relay comprises a magnetic circuit part, a base part and an arc isolation piece, wherein the arc isolation piece of the small-sized intermediate relay in the prior art is of a single structure, the arc isolation piece is inserted between static spring groups and is simply limited through a shell, the arc isolation piece is loose and has a certain movable space, a gap is reserved between the arc isolation piece and the base, the arc can be effectively isolated in the initial life stage of the relay, but metal powder generated by contact wear at the later end of the life stage can be distributed in the gap between the arc isolation piece and the base, so that the arc isolation cannot be effectively carried out in the later life stage of the relay, and the insulation performance is reduced.

And because this type of relay, its internal volume is less, leads to creepage distance shorter, and the withstand voltage is low, and spare part is more, and the installation is loaded down with trivial details, and structural reliability is not good enough, influences the action stability.

In addition, the magnetic circuit part and the base part are fixed by screws, and the following problems are also present:

1. screw holes are formed in the base, moisture or gas can quickly enter the relay through the screw holes, corrosion of iron parts in the relay is accelerated, and the relay cannot meet salt spray requirements;

2. in the process of locking the screw, 60N-80N force is usually required, metal powder can be generated by friction between the yoke iron and the screw, and the powder can enter the relay to cause non-conduction of the contact or reduced insulation performance;

3. because the screw is complex in appearance, the degree of automation is usually low, and the production efficiency is low;

4. when the screw is driven into the yoke, if a certain skew exists, a sliding wire is generated, so that the whole magnetic circuit part is scrapped;

5. because a magnetic circuit part is locked by a large force, the magnetic circuit part can generate certain deflection, and when the armature is sucked down, the armature is attached to the iron core unevenly to generate alternating current sound, so that the temperature of the relay is increased and even the service life of the relay is influenced;

6. the yoke is connected to the screw, and yoke and movable spring part laminating have the risk of electric shock when using.

Disclosure of Invention

The present utility model aims to provide a small-sized intermediate relay to solve at least one technical problem existing above.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: a small-sized intermediate relay comprises a magnetic circuit part, a contact part and an arc isolation piece, wherein the magnetic circuit part is isolated from the contact part through the arc isolation piece;

the magnetic circuit part comprises a coil frame and a coil arranged on the coil frame;

the contact part comprises a base and a plurality of static spring groups arranged on the base, and the coil rack is fixedly arranged on the base;

the arc isolation piece comprises a mounting part and a plurality of arc isolation parts, wherein the mounting part comprises a vertical side plate and a bottom side plate which are bent, the arc isolation parts are arranged on one side of the vertical side plate, which is away from the bottom side plate, in parallel, the arc isolation parts are arranged between two static spring groups, the bottom side plate is arranged between the coil rack and the base in a limiting manner, and the vertical side plate is arranged between the static spring groups and the coil rack.

In one embodiment, the bottom of the coil rack is provided with a hook part, the base is provided with a hook matching part, and the hook part is fixedly clamped with the hook matching part to fix the coil rack on the base.

In one embodiment, the hook portion and the hook mating portion are hook structures corresponding to each other, or the hook portion is a hook structure, and the hook mating portion is a hook groove structure corresponding to the hook structure.

In one embodiment, the magnetic circuit part further comprises a yoke, an armature and an iron core, the coil frame is arranged on the yoke, the coil is wound outside the coil frame, the iron core is arranged in the coil frame, a step clamping groove is formed in one side, close to the vertical side plate, of the coil frame, the bottom side of the armature is arranged in the step clamping groove, and the vertical side plate is matched with the step clamping groove to limit the armature.

In one embodiment, the contact part further comprises a movable reed and a movable reed bracket which are arranged on the inner side of the base, the movable reed is fixedly inserted with a movable reed leading-out sheet on the base, the movable reed and the movable reed leading-out sheet are connected through the movable reed bracket, the static reed group comprises a first static reed and a second static reed which are fixedly inserted on the base, the movable reed is positioned between the first static reed and the second static reed, a normally closed static contact and a normally open static contact are respectively arranged on one side of the first static reed and one side of the second static reed, which faces the movable reed, and movable contacts corresponding to the normally closed static contact and the normally open static contact are respectively arranged on two sides of the movable reed.

In one embodiment, the inner side of the base is provided with an isolating surrounding wall in a protruding mode corresponding to the periphery of the first static reed and the periphery of the second static reed.

In one embodiment, the device further comprises a pushing card, wherein one side of the pushing card is clamped and fixed on the armature, and the other side of the pushing card is connected with the movable spring and used for driving the movable spring to elastically deform.

In one embodiment, an indication window is arranged on the shell, an indication part is further extended on one side of the push card far away from the armature, and the indication window is correspondingly matched with the indication part in an indication mode.

In one embodiment, the bottom of the vertical side plate is concavely provided with a groove, the movable spring leading-out piece comprises a horizontal section, one end of the horizontal section is bent upwards to form a connecting section, the other end of the horizontal section is bent downwards to form a leading-out section, the leading-out section is fixedly inserted on the base, the top surface of the horizontal section is in abutting fit with the bottom surface of the bottom side plate, and the connecting section is clamped on the groove in a limiting manner.

In one embodiment, the movable spring support is U-shaped, the limit clamp of the movable spring support is arranged on the periphery of the isolation surrounding wall corresponding to the second static reed, one end of the movable spring support is in abutting connection with the connecting section, and the other end of the movable spring support is connected with the movable reed.

In one embodiment, the coil rack is further provided with a coil inserting piece and an LED integrated assembly, the base is further fixedly inserted with a coil leading-out piece, the coil inserting piece is provided with a winding end, a leading-out end and an LED end, the winding end is wound with the coil, the leading-out end is fixedly welded with the coil leading-out piece, and the LED end is fixedly connected with the LED integrated assembly.

The utility model has the following beneficial effects:

(1) The utility model comprises a magnetic circuit part, a contact part and an arc isolation piece, wherein the magnetic circuit part is isolated from the contact part through the arc isolation piece; the magnetic circuit part comprises a coil frame and a coil arranged on the coil frame; the contact part comprises a base and a plurality of static spring groups arranged on the base, and the coil rack is fixedly arranged on the base; the arc isolation piece comprises a mounting part and a plurality of arc isolation parts, wherein the mounting part comprises a vertical side plate and a bottom side plate which are bent, the arc isolation parts are arranged on one side of the vertical side plate, which is away from the bottom side plate, in parallel, the arc isolation parts are arranged between two static spring groups, the bottom side plate is arranged between the coil rack and the base in a limiting manner, and the vertical side plate is arranged between the static spring groups and the coil rack. This separate structural design of arc spare and with magnetic circuit part, contact portion's assembly methods, utilize coil former and base cooperation to compress tightly firmly separating the arc spare, it is spacing about forming, stability is higher, holistic structure is compacter and less exquisite, and creepage distance is longer, both guaranteed the arc effect that separates between contact portion and the magnetic circuit part, also made holistic withstand voltage performance better, the leakproofness is higher, and insulating effect is better, and life is longer.

(2) Through being provided with couple portion bottom the coil former, be provided with couple mating portion on the base, couple portion and the solid cooperation of couple mating portion card realize fixing the coil former on the base, this fixed mode is firm more stable, has realized accurate location, convenient assembling.

Drawings

Fig. 1 is an external view schematically showing embodiment 1 of the present utility model;

FIG. 2 is an exploded schematic view of embodiment 1 of the present utility model;

FIG. 3 is a perspective view of embodiment 1 of the present utility model with the outer casing removed;

FIG. 4 is a side view of embodiment 1 of the present utility model with the outer shell removed;

FIG. 5 is a perspective view of embodiment 1 of the present utility model with the housing and base removed;

FIG. 6 is a schematic diagram showing the cooperation of the magnetic circuit portion and the arc-separating member of embodiment 1 of the present utility model;

FIG. 7 is a schematic diagram of a pusher card of embodiment 1 of the present utility model;

fig. 8 is a schematic structural view of an armature of embodiment 1 of the present utility model;

fig. 9 is a schematic structural view (a) of a bobbin of embodiment 1 of the present utility model;

fig. 10 is a schematic structural view (two) of a bobbin of embodiment 1 of the present utility model;

fig. 11 is a schematic diagram showing the cooperation of the bobbin and the armature in embodiment 1 of the present utility model;

fig. 12 is an inside view of the case of embodiment 1 of the present utility model;

fig. 13 is a schematic structural view of the base of embodiment 1 of the present utility model;

fig. 14 is a schematic structural view (one) of an arc separating member of embodiment 1 of the present utility model;

fig. 15 is a schematic structural view (ii) of an arc separator of embodiment 1 of the present utility model;

fig. 16 is a schematic structural view of a coil insert of embodiment 1 of the present utility model;

fig. 17 is a schematic structural view of a bobbin of embodiment 2 of the present utility model;

fig. 18 is a schematic structural view of the base of embodiment 2 of the present utility model.

The drawings are marked: the magnetic circuit part comprises a base, a housing, a magnetic circuit part, a coil frame, a step clamping groove 311, a coil 32, a yoke 33, an armature 34, a bayonet, a hook 4, a hook matching part 5, a notch 6, a movable spring, a bent hook part 71, a movable contact 8, a first fixed spring 9, a normally closed fixed contact 10, a second fixed spring 11, a normally open fixed contact 12, a movable spring leading-out sheet 13, a connecting section 131, a horizontal section 132, a leading-out section 133, a coil leading-out sheet 14, a flat sheet 141, an arc-isolating member 15, a mounting part 151, a vertical side plate 1511, a bottom side plate 1512, an arc-isolating part 152, a groove 153, a push clip 161 hook hole 162, a first bayonet, a special-shaped slot, a 164 indicating part 17, a movable spring bracket 18, a coil inserting sheet 19, a winding end 192 leading-out end 193LED end 20, a slot 21, an indicating window 22 and a transverse convex rib 23.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

Example 1:

referring to fig. 1 to 16, as an embodiment of the present utility model, there is provided a small-sized intermediate relay including a magnetic circuit portion 3, a contact portion, and an arc-isolating member 15;

the magnetic circuit portion 3 includes a bobbin 31, a coil 32 provided on the bobbin 31, a hook portion 4 provided at the bottom of the bobbin 31,

the contact part comprises a base 1 and a plurality of static spring groups arranged on the base 1, a hook matching part 5 is arranged on the base 1, and the hook part 4 and the hook matching part 5 are clamped and fixedly matched to fix the coil rack 31 on the base 1;

the arc isolation member 15 includes a mounting portion 151 and a plurality of arc isolation portions 152, the mounting portion 151 includes a vertical side plate 1511 and a bottom side plate 1512 which are folded, the arc isolation portions 152 are arranged on the vertical side plate 1511 in parallel to each other on one side of the bottom side plate 1512, the arc isolation portions 152 are located between two static spring groups, the bottom side plate 1512 is mounted between the coil frame 31 and the base 1 in a limiting manner, and the vertical side plate 1511 is located between the static spring groups and the coil frame 31.

In the above technical scheme, the structural design of the arc isolation member 15 and the assembly mode of the arc isolation member 3 and the contact part are matched with the coil frame 31 and the base 1 to compress and stabilize the arc isolation member 15, so that the upper, lower, front, rear, left and right limiting is formed, the stability is higher, the arc isolation part 152 is positioned between two static spring groups, the effective arc isolation is realized for the relay, and the arc isolation part 152 is arranged to be inserted between the static spring groups in an inclined boss mode, so that no gap exists between the base 1 and each static spring, and even if the end of service life still has a good insulation effect.

Therefore, the whole structure of the relay is more compact and small, the creepage distance is longer, the arc isolation effect between the contact part and the magnetic circuit part 3 is ensured, the whole pressure resistance is better, the tightness is higher, the insulation effect is better, and the service life is longer.

In addition, the coil rack 31 is fixed on the base 1 through the clamping and fixing matching of the hook part 4 and the hook matching part 5, the fixing mode is firmer and more stable, the accurate positioning is realized, and the assembly is convenient; and because need not to offer the screw on base 1 for the magnetic circuit part 3 of relay need not pass through the fix with screw with base 1, still have following several advantages:

1. the base 1 has higher tightness, prevents moisture or gas from entering the relay, and avoids corrosion of iron parts in the relay, so that the relay can meet the salt spray requirement;

2. the problem that the yoke 33 rubs with the screw to generate metal powder due to overlarge force in the locking process of the screw, and the metal powder enters the relay to cause non-conduction of a contact or the reduction of insulation performance is avoided;

3. the hook part 4 and the hook matching part 5 have simple structure, simpler assembly and higher production efficiency;

4. avoiding the occurrence of slipping due to skew when the screw is driven into the yoke 33, thereby scrapping the whole magnetic circuit part 3;

5. the assembly of the magnetic circuit part 3 is ensured to be more correct and not to incline, and the phenomenon that the temperature of the relay is increased or even the service life of the relay is influenced due to the fact that the armature 34 is attached to the iron core unevenly to generate alternating current sound after being sucked down is avoided;

6. the hook part 4 and the hook matching part 5 are made of insulating materials, so that the electric shock risk of workers in use is reduced.

Furthermore, the volume of the existing intermediate relay is generally 2.2 ten thousand cubic millimeters, the height is more than 36 millimeters, the miniaturized design of the terminal customer is not facilitated, the volume of the consumed materials is more, the carbon consumption is large, and the process flow is complex. The relay of the utility model does not need screw fixation, the magnetic circuit part 3 can be arranged in a horizontal type, the height of the relay can be reduced, the volume of the relay can be reduced to 1.15 ten thousand cubic millimeters, and the volume is reduced to 19 millimeters.

In this embodiment, the hook portion 4 and the hook mating portion 5 are of a hook structure that are correspondingly matched up and down, so that the coil rack 31 can be inserted onto the base 1 from top to bottom, wherein the coil rack 31 is provided with a notch 6 beside the corresponding hook portion 4, and the hook structure can generate a certain deformation when the coil rack 31 is inserted into the base 1, so that the assembly process is smoother.

Of course, in other cases, the hook portion 4 may be a hook structure, and the hook mating portion 5 may be a hook groove structure corresponding to the hook structure.

In this embodiment, the magnetic circuit portion 3 further includes a yoke 33, an armature 34, and an iron core, the coil frame 31 is disposed on the yoke 33, the coil 32 is wound outside the coil frame 31, the iron core is disposed in the coil frame 31, a step clamping groove 311 is formed on a side of the coil frame 31 near the vertical side plate 1511, the bottom side of the armature 34 is mounted in the step clamping groove 311, the vertical side plate 1511 cooperates with the step clamping groove 311 to limit the armature 34, that is, the armature 34 is limited up and down and left and right through the step clamping groove 311, the vertical side plate 1511 is blocked at the notch side of the step clamping groove 311, so that the armature 34 is located between the vertical side plate 1511 and the coil frame 31, front and rear limiting of the armature 34 is achieved, the stability of the operation of the armature 34 is ensured, the limit position of the action of the armature 34 is limited by the transverse protruding rib 23 on the inner top wall of the housing 2, the armature 34 is ensured not to be displaced irreversibly when receiving a certain impact, and the stability of the action of the armature 34 is ensured.

In this embodiment, the contact portion further includes a movable reed 7 and a movable reed support 17 mounted on the inner side of the base 1, a movable reed leading-out piece 13 is fixedly inserted on the base 1, the movable reed 7 and the movable reed leading-out piece 13 are connected through the movable reed support 17, the static reed group includes a first static reed 9 and a second static reed 11 fixedly inserted on the base 1, the movable reed 7 is located between the first static reed 9 and the second static reed 11, a normally closed static contact 10 and a normally open static contact 12 are respectively disposed on one sides of the first static reed 9 and the second static reed 11 facing the movable reed 7, and a movable contact 8 corresponding to the normally closed static contact 10 and the normally open static contact 12 is respectively disposed on two sides of the movable reed 7.

Because among the prior art, movable reed and movable spring draw out the piece and be connected through the electron line, and the soft irregular bending of electron line, the electron line wears to movable spring hole in, and the welding of electron line and movable spring draw out the piece all is the production difficulty, leads to many years movable spring part all can not realize automated production all the time, and the electron line comprises many thin copper wire parcel insulating skin, the electron line is in order to be with movable reed and movable spring draw out the piece welding and need peel off insulating skin, the broken strand of inside copper wire of electron line easily appears in the in-process of peeling off insulating skin, the problem that the electron line disconnection can appear in the long-term use of electron line of broken strand, the relay just loses basic conversion function after the electron line disconnection. Therefore, the movable spring bracket 17 is adopted to connect the movable spring 7 with the movable spring leading-out sheet 13, so that the welding is more stable, the service life of the relay is prolonged, the automatic production is realized, and the production efficiency is improved.

In this embodiment, the inner side of the base 1 is formed with an isolation surrounding wall 21 corresponding to the outer peripheries of the first and second

static springs

9 and 11, so as to perform a surrounding isolation function on the first and second

static springs

9 and 11, and have better arc isolation and insulation effects.

Referring to fig. 7, in this embodiment, the device further includes a push card 16, one side of the push card 16 is clamped on the armature 34, and the other side is connected with the movable spring 7, so as to drive the movable spring 7 to perform elastic deformation, that is, provide the tension of elastic deformation of the movable spring 7, and when the movable spring 7 performs reset motion under the action of self elastic force, the push card 16 can also be driven to perform reset motion, and conventional parts such as a pressure spring and the like are not required to be installed between the armature 34 and the yoke 33 to provide the tension of elastic deformation of the movable spring 7, so that the relay has simpler and more compact structure, smaller volume, simpler installation, stronger and more stable limit and better transmission stability.

Specifically, the top of the movable reed 7 is bent and arranged to form a bent hook portion 71, the pushing clamp 16 is provided with a hook hole 161, and the movable reed 7 is connected with the pushing clamp 16 through the cooperation of the bent hook portion 71 and the hook hole 161, so that the transmission stability is higher.

The push card 16 and the armature 34 are provided with a mutual card structure, namely, a first bayonet 162 is formed on two opposite sides of one end of the push card 16, a second bayonet 341 is formed on two opposite sides of one end of the armature 34, the first bayonet 162 of the push card 16 and the second bayonet 341 of the armature 34 are in cross staggered and clamped connection, the connection stability is higher, and the action stability of the relay is further guaranteed.

In this embodiment, a plurality of special-shaped slotted holes 163 are further formed in the push card 16, the creepage distance and the air gap between the movable springs 7 can be increased, the initial pressure resistance of the relay is improved, and after the relay is used for a certain time, a large amount of metal dust is generated by continuously ablating the contacts through an arc to cover the periphery of the contacts, so that the movable springs 7 can be effectively separated, the relay also has good pressure resistance in the middle and later stages of service life, and the safety of users is ensured. In addition, the plurality of special-shaped slotted holes 163 can ensure that the wall thickness of the pushing card 16 is uniform, the injection molding process is simpler, the molding is easier, and the production efficiency is higher.

In this embodiment, an indication window 22 is disposed on the housing 2, an indication portion 164 is further extended on a side of the push card 16 away from the armature 34, the indication window 22 and the indication portion 164 form indication cooperation correspondingly, that is, the indication portion 164 moves forward and backward along with the push card 16, when the relay is powered on, the push card 16 drives the movable spring 7 to elastically deform and move backward, at this time, the movable contact 8 on the movable spring 7 is in conductive contact with the normally open static contact 12, the indication portion 164 is displayed in the indication window 22 of the housing 2, when the relay is powered off and released, the movable spring 7 moves forward under the action of self-elastic force, the movable contact 8 on the movable spring 7 is in conductive contact with the normally closed static contact 10, and meanwhile, the movable spring 7 drives the push card 16 to move forward, at this time, the indication portion 164 disappears in the indication window 22 of the housing 2, and a user can identify the working state of the relay by observing the indication portion 164 of the push card 16, thereby realizing the effect of mechanical indication. The traditional relay generally needs to use the structural design of the spring and the indicating plate to realize the effect of mechanical indication, and the scheme of the pushing card 16 does not need to set conventional parts such as a pressure spring and the like to provide the tensile force of the movable reed 7 for elastic deformation, so that the structure is simpler, the assembly is more convenient, and the stability is higher.

In this embodiment, erect curb plate 1511 bottom sunken being formed with recess 153, move spring and draw forth piece and include horizontal segment 132, the one end of horizontal segment 132 upwards bends and forms linkage segment 131, the other end of horizontal segment 132 downwards bends and forms and draw forth section 133, draw forth section 133 fixed cartridge is on base 1, and horizontal segment 132 top surface and bottom curb plate 1512 bottom surface support the cooperation, linkage segment 131 spacing cartridge is on recess 153, this setting makes move spring draw forth piece 13 can be spacing from top to bottom to arc piece 15 to guarantee that the installation stability who separates arc piece 15 is higher.

In this embodiment, the movable spring support 17 is U-shaped, and the limit clip is mounted on the periphery of the isolation surrounding wall 21 corresponding to the second static spring 11, one end of the movable spring support 17 is abutted against the connecting section 131, the other end is connected with the movable spring 7, and the movable spring support 17, the isolation surrounding wall 21, the movable spring leading-out sheet 13 and the arc isolation member 15 can be tightly abutted against each other to form a stable limit, so that the structure is more compact, and the installation stability of the relay is further improved.

Referring to fig. 16, in this embodiment, a coil lead-out piece 14 is fixedly inserted into the base 1, a coil inserting piece 19 and an LED integrated component 18 are further disposed on the coil frame 31, the LED integrated component 18 can display a working state of the relay, so that a user is more obviously prompted, the coil inserting piece 19 adopts a three-leg design, that is, the coil inserting piece 19 has a winding end 191, a lead-out end 192 and an LED end 193, the winding end 191 is wound with the coil 32, the lead-out end 192 is welded and fixed with the coil lead-out piece 14, and the LED end 193 is fixedly connected with the LED integrated component 18. Because the coil 32 is usually a thin copper wire with the diameter of 0.015-0.21 mm, the coil 32 is easily scratched during manual welding, the coil 32 breaks to cause the whole relay to lose basic functions, the whole relay is required to be scrapped, and the cost is high. Therefore, the winding end 191 is wound with the coil 32, so that the coil 32 is ensured not to be broken due to welding, a large number of working procedures are saved, the working procedures are simpler, the cost is lower, and the automatic production can be realized.

Referring to fig. 9, 10 and 16, in this embodiment, four hook structures are respectively disposed on two sides of the front end and the rear end of the coil frame 31, the four hook structures of the base 1 are horizontally clamped on the base 1 after the assembly is completed, two slots 20 are disposed on two sides of the rear end of the coil frame 31, two coil inserting pieces 19 are respectively disposed on the slots 20 on two sides of the rear end of the coil frame 31, and the leading-out ends 192 of the two coil inserting pieces 19 are welded with the coil leading-out pieces 14, so that the coil frame 31 is fixed on the base 1 through 6 fixing points altogether, the magnetic circuit portion 3 is very stable, and the action stability of the relay is ensured.

In this embodiment, the top of the coil lead-out piece 14 is bent horizontally to form a flat piece 141, and the lead-out end 192 of the coil inserting piece 19 is bonded and welded to the flat piece 141 of the coil lead-out piece 14, so that the welding stability is higher.

Embodiment 2 for the sake of brevity, this embodiment describes only the portions different from embodiment 1:

referring to fig. 17 and 18, the present utility model further provides a small-sized intermediate relay, in which two hook portions 4 are respectively disposed at two sides of the front end of the coil frame 31, the front end of the coil frame 31 is fixedly mounted, the coil inserting pieces 19 are disposed at two sides of the rear end of the coil frame 31, the front end of the coil frame 31 is fixed, the coil frame 31 is fixed at the base 1 through 4 fixing points, and the assembly stability of the magnetic circuit portion 3 is ensured, so that the operation stability of the relay is ensured.

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. A miniature intermediate relay, characterized in that: the magnetic circuit part is isolated from the contact part through the arc isolating piece;

2. The miniature intermediate relay of claim 1, wherein: the coil rack bottom is provided with the couple portion, is provided with couple mating portion on the base, and couple portion and couple mating portion card are solid to be cooperated and are realized fixing the coil rack on the base.

3. The miniature intermediate relay of claim 2, wherein: the hook part and the hook matching part are of a hook structure corresponding to each other, or the hook part is of a hook structure, and the hook matching part is of a hook groove structure corresponding to the hook structure.

4. The miniature intermediate relay of claim 1, wherein: the magnetic circuit part also comprises a yoke, an armature and an iron core, the coil frame is arranged on the yoke, the coil is wound outside the coil frame, the iron core is arranged in the coil frame, a step clamping groove is formed in one side, close to the vertical side plate, of the coil frame, the bottom side of the armature is arranged in the step clamping groove, and the vertical side plate is matched with the step clamping groove to limit the armature.

5. The miniature intermediate relay of claim 4, wherein: the contact part further comprises a movable reed and a movable reed bracket which are arranged on the inner side of the base, a movable reed leading-out sheet is fixedly inserted on the base, the movable reed and the movable reed leading-out sheet are connected through the movable reed bracket, the static reed group comprises a first static reed and a second static reed which are fixedly inserted on the base, the movable reed is positioned between the first static reed and the second static reed, a normally closed static contact and a normally open static contact are respectively arranged on one side of the first static reed and one side of the second static reed, which faces the movable reed, and movable contacts corresponding to the normally closed static contact and the normally open static contact are respectively arranged on two sides of the movable reed.

6. The miniature intermediate relay of claim 5, wherein: the inner side of the base is provided with an isolation surrounding wall in a protruding mode corresponding to the periphery of the first static reed and the periphery of the second static reed.

7. The miniature intermediate relay of claim 5, wherein: the movable spring is characterized by further comprising a pushing card, wherein one side of the pushing card is fixedly clamped on the armature, and the other side of the pushing card is connected with the movable spring and is used for driving the movable spring to elastically deform.

8. The miniature intermediate relay of claim 7, wherein: an indication window is arranged on the shell, an indication part is further extended on one side of the push card far away from the armature, and the indication window and the indication part are correspondingly formed into indication fit.

9. The miniature intermediate relay of claim 6, wherein: the bottom of the vertical side plate is concavely provided with a groove, the movable spring leading-out piece comprises a horizontal section, one end of the horizontal section is bent upwards to form a connecting section, the other end of the horizontal section is bent downwards to form a leading-out section, the leading-out section is fixedly inserted on the base, the top surface of the horizontal section is in abutting fit with the bottom surface of the bottom side plate, and the connecting section is clamped on the groove in a limiting manner.

10. The miniature intermediate relay of claim 9, wherein: the movable spring support is U-shaped, is limited and clamped on the periphery of the isolation surrounding wall corresponding to the second static reed, one end of the movable spring support is in abutting connection with the connecting section, and the other end of the movable spring support is connected with the movable reed.

11. A miniature intermediate relay according to any one of claims 1-10, characterized in that: the coil rack is also provided with a coil inserting piece and an LED integrated assembly, the base is also fixedly inserted with a coil leading-out piece, the coil inserting piece is provided with a winding end, a leading-out end and an LED end, the winding end is wound with the coil, the leading-out end is fixedly welded with the coil leading-out piece, and the LED end is fixedly connected with the LED integrated assembly.