CN112086318A - Relay convenient to automatic assembly - Google Patents

Abstract

The invention discloses a relay convenient for automatic assembly, which comprises a magnetic circuit part and a base, wherein the magnetic circuit part is arranged on the base; the magnetic circuit part is arranged on the base; the magnetic circuit part comprises a coil rack and an enameled wire; the coil rack comprises flanges at two ends and a winding window between the flanges at two ends; the enameled wire is wound in the winding window of the coil frame; one edge of one of the two flanges of the coil rack is provided with a thinning part, and the area of the thinning part at least comprises the outer layer part of the winding thickness of the enameled wire in the winding window. The invention can realize automatic assembly and has the characteristics of high automation degree, low product manufacturing cost and simple production process.

Description

Relay convenient to automatic assembly

Technical Field

The invention relates to the technical field of relays, in particular to a relay convenient for automatic assembly.

Background

The relay generally includes a magnetic circuit portion, a contact portion, a pushing portion and a base, the magnetic circuit portion and the contact portion are respectively mounted on the base, the contact portion includes a movable spring portion and a stationary spring portion, the pushing portion is connected between the magnetic circuit portion and the movable spring portion, when the magnetic circuit portion works, the movable spring portion is moved by the pushing portion, and a movable contact of the movable spring portion is contacted with or separated from a stationary contact of the stationary spring portion. The relay utilizes the armature in the magnetic circuit part, when the magnetic circuit part works, the armature is matched with the iron core in the magnetic circuit part, so that the pushing part is driven to perform corresponding action, and the movable spring part is driven to act. Fig. 1 is an exploded view of a partial structure of a relay in the prior art, as shown in fig. 1, the relay includes a base 101, a magnetic circuit portion 102, a movable spring portion 103, a stationary spring portion 104 and a pushing portion 105, wherein the magnetic circuit portion 102 is horizontally mounted on the base 101 (i.e. the axis of the iron core is horizontally disposed), the movable spring portion 103 and the stationary spring portion 104 are respectively inserted on the base 101, and the pushing portion 105 is connected between an armature 106 of the magnetic circuit portion and the movable spring portion 102, and the relay in the prior art mainly has the following disadvantages:

1. the coil deformation of the coil rack seriously influences the stability of the integral mechanical parameters of the product due to the winding tension of the enameled wire, thereby influencing the product performance; in the prior art, manual correction needs to be carried out on the movable spring, so that automatic assembly of a product is influenced;

2. the magnetic circuit part 102 is heavy in weight and needs to be fixed with the base 101 by glue dispensing, so that the anti-falling performance of the product is enhanced, the glue dispensing procedures are increased, the possibility of glue pollution is increased, the production line process is complex, the automation degree is low, and the overall cost of the product is increased; as shown in fig. 1, a dispensing opening 107 is further formed in the base 101, which increases the difficulty in manufacturing the base 101;

3. the left and right soldering lug parts of the coil are two symmetrical parts, and because the two parts are different in shape but very similar, the materials are easily mixed on site, so that the defects are easily caused, and the automatic production cannot be realized.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides the relay which is convenient for automatic assembly, can realize automatic assembly through structural improvement, and has the characteristics of high automation degree, low product manufacturing cost and simple production process.

The technical scheme adopted by the invention for solving the technical problems is as follows: a relay facilitating automated assembly includes a magnetic circuit portion and a base; the magnetic circuit part is arranged on the base; the magnetic circuit part comprises a coil rack and an enameled wire; the coil rack comprises flanges at two ends and a winding window between the flanges at two ends; the enameled wire is wound in the winding window of the coil frame; one edge of one of the two flanges of the coil rack is provided with a thinning part, and the area of the thinning part at least comprises an outer layer part of the winding thickness of the enameled wire in the winding window, so that the thinning part is utilized to give way to the coil rack deformation caused by the winding tension of the enameled wire, and the assembly error of related parts caused by the deformation of the coil rack is avoided.

The two flanges of the coil rack are respectively in a corresponding rectangular shape, the edge of one rectangular side of one flange is provided with a thinning part which penetrates through the whole rectangular side, and the width area of the thinning part at least comprises the outer layer part of the winding thickness of the enameled wire in the winding window.

The magnetic circuit part is horizontally arranged on the base; the magnetic circuit part also comprises an iron core, a yoke and an armature; the iron core is arranged in an iron core hole of the coil frame, the yoke iron is bent into an L shape, one L-shaped side of the yoke iron is fixed with one end of the iron core on one side of the outer side of one flange of the coil frame, and the other L-shaped side of the yoke iron is matched outside a winding window of the coil frame; the other end of the yoke is provided with a knife edge, and the armature is matched at the knife edge of the yoke and matched with the other end of the iron core; the thinning part of the coil rack is arranged at the bending part corresponding to the yoke iron, so that the bulge formed by bending the yoke iron is abducted by the thinning part.

The edge of one of the rectangular sides of one of the flanges of the bobbin is provided with a step on the outer side of the one of the flanges, and the thinned portion is constituted by a depressed portion at the step.

A first convex part is further arranged on one side of the outer side of one flange of the coil rack, and a glue injection port is formed in the first convex part; an abdicating notch is arranged at the position, corresponding to the first convex part, of one L-shaped side of the yoke iron, so that the positioning of the yoke iron is realized by utilizing the matching of the abdicating notch of the yoke iron and the first convex part of the coil rack; the protruding height of the first protrusion on the outer side surface of one of the flanges of the bobbin is smaller than the thickness of one side of the L-shape of the yoke.

The bottom of the other L-shaped side of the yoke is provided with two inserting convex parts which protrude downwards, and an inserting notch is formed between the two inserting convex parts; the base is provided with a mounting groove for mounting the magnetic circuit part; in the mounting groove, two inserting grooves are arranged at the position of the other side corresponding to the L shape of the yoke, a matching convex part is formed between the two inserting grooves, when the two inserting convex parts of the other side of the L shape of the yoke are correspondingly matched with the two inserting grooves of the base, the inserting notch of the other side of the L shape of the yoke is in interference fit with the matching convex part of the base.

The armature is bent into an L shape, the bent part of the armature is matched with a knife edge of the yoke iron through a pressure spring, and one L-shaped side of the armature is matched with the other end of the iron core; the other side of the L shape of the armature is provided with a pushing clamp and is positioned outside the other side of the L shape of the yoke; the relay also comprises a movable spring part, and the movable spring part comprises a movable spring piece and a movable contact fixed on the movable spring piece; the pushing clamp is provided with a pushing arm, and the tail end of the pushing arm is matched with the movable spring leaf.

The pushing clamp is an injection molding piece which is formed on the other side of the L shape of the armature through injection molding, and the injection molding piece comprises an injection molding main body which is coated on the tail end of the other side of the L shape of the armature and the pushing arm which protrudes from the injection molding main body to the direction of the movable spring; the tail end of the injection molding main body is provided with a groove with an opening direction facing the other side of the L shape of the yoke; in the base, a blocking wall extending along the axis direction of the iron core is arranged at a position corresponding to the pointed position of the tail end of the injection molding main body in a side wall corresponding to one end of the iron core, and a second convex part in clearance fit with a groove of the injection molding main body is arranged at the tail end of the blocking wall.

And a third convex part which protrudes outwards is further arranged on one surface of the other side of the L shape facing the yoke in the injection molding main body.

And two bending parts are arranged on the movable spring leaf, and when the two bending parts, the tail end of the injection molding main body and the projection of the pushing arm on the same plane are projected, the two bending parts are all located in the range from the tail end of the injection molding main body to the pushing arm.

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

1. the edge of one rectangular side of one flange of the coil rack is provided with a thinning part which penetrates through the whole rectangular side, and the width area of the thinning part at least comprises the outer layer part of the winding thickness of the enameled wire in the winding window. According to the structure, after the edge of the coil frame is thinned, the deformation of the coil frame is concentrated at the edge thinning part after the coil frame is wound, and the thinning part can be used for avoiding the coil frame deformation caused by the winding tension of the enameled wire, so that the assembly error of related components caused by the deformation of the coil frame is avoided; the invention is provided with the thinning part, does not influence the whole mechanical parameters, and can reduce manual correction, thereby improving the automation degree.

2. The invention adopts the mode that the thinning part of the coil frame is arranged at the bending part corresponding to the yoke, and the bulging formed by bending the yoke can be abducted by utilizing the thinning part, thereby facilitating the automatic assembly.

3. According to the invention, the first convex part is arranged on one side of the outer side of one flange of the coil frame, and the first convex part is provided with the glue injection port; and one side of the L-shaped yoke iron is provided with a yielding notch at the position corresponding to the first convex part. According to the structure, the rough positioning of the yoke can be realized by utilizing the matching of the abdicating notch of the yoke and the first convex part of the coil rack, and the automatic assembly is convenient.

4. According to the invention, two bending parts are arranged on the movable spring, and when the two bending parts, the tail end of the injection molding main body and the projection of the pushing arm on the same plane are adopted, the two bending parts are both in the range from the tail end of the injection molding main body to the pushing arm. The structure of the invention ensures that no interference occurs in the product assembly process, thereby facilitating automatic assembly.

5. The bottom of the other side of the L-shaped yoke is provided with two inserting convex parts which protrude downwards, and an inserting notch is formed between the two inserting convex parts; the base is provided with a mounting groove for mounting the magnetic circuit part; in the mounting groove, two inserting grooves are arranged at the position of the other side corresponding to the L shape of the yoke, a matching convex part is formed between the two inserting grooves, when the two inserting convex parts of the other side of the L shape of the yoke are correspondingly matched with the two inserting grooves of the base, the inserting notch of the other side of the L shape of the yoke is in interference fit with the matching convex part of the base. According to the structure, the yoke iron and the base are clamped and matched for fixation, so that the dispensing fixation in the prior art is cancelled, the automatic assembly can be met, and the production process is simplified.

The invention is further explained in detail with the accompanying drawings and the embodiments; a relay of the present invention that facilitates automated assembly is not limited to the embodiments.

Drawings

FIG. 1 is a partial schematic configuration of a prior art relay;

FIG. 2 is a schematic structural view of an embodiment of the present invention (without the housing);

FIG. 3 is a perspective (partial) view of an embodiment of the present invention;

FIG. 4 is a top view of a partial configuration of an embodiment of the present invention;

FIG. 5 is a perspective, partially exploded, schematic view of an embodiment of the present invention;

FIG. 6 is a perspective (partially) exploded view (rotated at an angle relative to FIG. 5) of an embodiment of the present invention;

fig. 7 is a partial configuration diagram of a magnetic circuit portion of the embodiment of the present invention;

fig. 8 is a perspective view schematically illustrating a yoke according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of an armature of an embodiment of the present invention;

fig. 10 is a schematic perspective view (rotated at an angle relative to fig. 9) of an armature of an embodiment of the present invention;

FIG. 11 is a schematic perspective view of a base of an embodiment of the present invention;

fig. 12 is a top view of a base of an embodiment of the present invention.

Detailed Description

Examples

Referring to fig. 2 to 12, a relay of the present invention, which facilitates automated assembly, includes a magnetic circuit portion 2 and a base 3; in the embodiment, the relay is of a clapper type structure, and the magnetic circuit part 2 is horizontally arranged on the base 3; the magnetic circuit part 2 comprises a coil former 21 and enameled wires 22; the bobbin 21 includes flanges 211, 212 at both ends and a winding window 213 between the flanges at both ends; the enamel wire 22 is wound in the winding window 213 of the bobbin 21; the two flanges 211, 212 of the coil frame 21 are respectively in a corresponding rectangular shape, a thinning portion 214 penetrating through the entire rectangular side is arranged at the edge of one of the rectangular sides of one of the flanges 211, and the width area of the thinning portion 214 at least comprises the outer layer part of the winding thickness of the enameled wire 22 in the winding window 213, so that the thinning portion 214 is used for avoiding the deformation of the coil frame 21 caused by the winding tension of the enameled wire 22, thereby avoiding the assembly error of related components caused by the deformation of the coil frame 21.

In the present embodiment, the magnetic circuit portion 2 further includes an iron core 23, a yoke 24, and an armature 25; the iron core 23 is arranged in the iron core hole 215 of the coil frame 21, the yoke 24 is bent into an L shape, one side 241 of the L shape of the yoke 24 is fixed with one end of the iron core 23 on one side of the outer side of one flange 211 of the coil frame, and the other side 242 of the L shape of the yoke 24 is matched outside the winding window 213 of the coil frame 21; the other end of the yoke 24 is provided with a knife edge 243, and the armature 25 is matched at the knife edge 243 of the yoke and matched with the other end of the iron core 23 in a clapping manner; the thinned portion 214 of the bobbin 21 is provided at a position corresponding to the bent portion of the yoke 24, so that the bulge 244 formed by bending the yoke 24 is abducted by the thinned portion.

In this embodiment, the magnetic circuit portion 2 further includes a left soldering lug 261 and a right soldering lug 262, and the structures of the left soldering lug 261 and the right soldering lug 262 are completely the same, so that the risk of material mixing is avoided, and the requirement of automatic production is met.

In this embodiment, the edge of one of the rectangular sides of one of the flanges 211 of the bobbin 21 is provided with a step 216 on an outer side of the one of the flanges 211, and the thinned portion 214 is formed by a depressed portion at the step.

In this embodiment, a first protrusion 217 is further disposed on an outer side surface of one of the flanges 211 of the coil frame 21, and the first protrusion 217 is provided with a glue injection opening; the L-shaped side 241 of the yoke 24 is provided with an abdicating notch 245 at a position corresponding to the first protrusion 217, so that the positioning of the yoke 24 is realized by the engagement of the abdicating notch 245 of the yoke 24 and the first protrusion 217 of the coil frame 21.

In this embodiment, the protruding height of the first protrusion 217 on the outer side surface of one of the flanges 211 of the bobbin 21 is smaller than the thickness of the L-shaped side 241 of the yoke 24.

In this embodiment, two insertion protrusions 246 protruding downward are disposed at the bottom of the other side 242 of the L-shape of the yoke 24, and an insertion notch 247 is formed between the two insertion protrusions 246; the base 3 is provided with a mounting groove 31 for mounting the magnetic circuit part 2; in the mounting groove 31, two inserting grooves 32 are arranged at a position corresponding to the other L-shaped edge 242 of the yoke 24, a fitting protrusion 33 is formed between the two inserting grooves 32, and when the two inserting protrusions 246 of the other L-shaped edge 242 of the yoke 24 are correspondingly fitted with the two inserting grooves 32 of the base, the inserting notch 247 of the other L-shaped edge 242 of the yoke is in interference fit with the fitting protrusion 33 of the base 3.

In the embodiment, the armature 25 is bent into an L-shaped shape, the bent part of the armature 25 is fitted at the knife edge 243 of the yoke 24 through a pressure spring 4, and one side 251 of the L-shaped armature 25 is fitted with the other end of the iron core 23 in a snap-fit manner; the other side 252 of the L-shape of the armature 25 is provided with a push card 5 and is positioned outside the other side 242 of the L-shape of the yoke 24; the relay further comprises a movable spring part 6, wherein the movable spring part 6 comprises a movable spring piece 61 and a movable contact 62 fixed on the movable spring piece; the push card 5 is provided with a push arm 51, and the tail end of the push arm 51 is matched with the movable spring leaf 61.

In this embodiment, the push card 5 is an injection molded part formed on the other side 252 of the L-shape of the armature 25 by injection molding, and the injection molded part 5 includes an injection molded main body 52 covering the end of the other side 252 of the L-shape of the armature and the push arm 51 protruding from the injection molded main body toward the movable spring; the tail end of the injection molding main body 52 is provided with a groove 521 the opening direction of which faces to the other side of the L shape of the yoke; in the base 3, in the side wall 34 corresponding to one end of the core, a blocking wall 35 extending along the axial direction of the core is provided at a position corresponding to the pointed position of the end of the injection molding body 52, and a second protrusion 351 in clearance fit with the groove 521 of the injection molding body is provided at the end of the blocking wall.

In this embodiment, the injection-molded body 52 is further provided with a third protrusion 522 protruding outward on a surface facing the other side 242 of the L-shape of the yoke 24.

According to the invention, the pushing card 5 is formed on the armature 25 by injection molding, so that the armature 25 and the pushing card 5 are integrated, and the assembly precision can be improved. Meanwhile, the convex part 522 is designed on one surface of the pushing card 5 facing the yoke 24 to replace the existing copper nail part, so that a natural air gap is formed between the armature 25 and the yoke 24, the magnetic short circuit is avoided, the utilization rate of the magnetic field intensity of the relay is improved, parts are reduced, and the assembly is simplified. The invention can also be provided with an injection molding positioning hole on the armature, and is used for positioning the armature during insert injection molding. According to the invention, the armature 25 and the push card 5 are integrated by injection molding, so that the action of the armature 25 is directly transmitted to the movable reed 61, and compared with the motion transmission drive of a plurality of parts, the reliability is higher.

The existing relay limits the armature 25 by the pressure spring 4, if the impact force is too large, the impact force exceeds the fatigue strength of the pressure spring 4, the pressure spring 4 is easy to generate plastic deformation and even fatigue fracture, and the relay is caused to lose efficacy. According to the invention, the groove 521 is arranged at one end of the push card 5 far away from the armature 25, the second convex part 351 is arranged on the blocking wall 35 of the base 3, and the second convex part 351 and the groove 521 form clearance fit, so that the flexible and smooth movement of the push card 5 can be ensured. When the relay is impacted by external force, the second convex part 351 of the baffle wall 35 props against the groove 521 on the pushing clamp 5 to limit the pushing clamp 5 and the armature 25, the angle variation of the pressure spring 4 is reduced, the pressure spring 4 is not easy to fatigue plastic deformation or fatigue fracture, and the service life of the pressure spring 4 is prolonged. When the external impact force disappears, the elastic restoring force of the pressure spring 4 enables the second convex part 351 of the blocking wall 35 to be in clearance fit with the groove 521, so that the second convex part 351 and the groove 521 are prevented from being contacted and rubbed for a long time to generate debris, and further the movement of pushing the card 5 is interfered, and even the contact of the contact can be influenced by the debris. Meanwhile, the matching of the concave 521 and the second convex 351 also increases the creepage distance and the air gap between the yoke 24 and the movable spring 5.

In this embodiment, the movable spring part 6 further includes a movable spring leading-out piece 63, the movable spring leading-out piece 63 is inserted into the base 3, one end of the movable spring piece 61 fixes the movable contact 62, and the other end of the movable spring piece 61 is fixedly connected with the movable spring leading-out piece 63; the movable spring 61 is provided with two bending portions, namely a first bending portion 611 and a second bending portion 612, when the first bending portion 611, the second bending portion 612, the end of the injection molded main body 52 and the projection of the pushing arm 51 on the same plane are all located in a range from the end of the injection molded main body 52 to the pushing arm 51, specifically as shown in fig. 4, the first bending portion 611 is located below a pushing convex portion (i.e., the pushing arm 51) of the pushing card, and the second bending portion 612 is located above an end portion (i.e., the end of the injection molded main body 52) of the pushing card.

The invention relates to a relay convenient for automatic assembly, which adopts the technical scheme that the edge of one rectangular side of one flange 211 of a coil frame 21 is provided with a thinning part 214 penetrating through the whole rectangular side, and the width area of the thinning part 214 at least comprises the outer layer part of the winding thickness of an enameled wire 22 in a winding window. According to the structure, after the edge of the coil frame 21 is thinned, the deformation of the coil frame 21 caused by the winding tension of the enameled wire 22 can be avoided by utilizing the thinning part 214 after the coil frame 21 is wound on the edge thinned part, so that the assembly error of related parts caused by the deformation of the coil frame 21 is avoided; the thinning part 214 is arranged, so that the whole mechanical parameters are not influenced, manual correction can be reduced, and the automation degree is improved.

The relay convenient for automatic assembly adopts the mode that the thinning part 214 of the coil frame 21 is arranged at the bending part corresponding to the yoke 24, and the bulge 244 formed by bending the yoke can also be abducted by using the thinning part 214, so that the automatic assembly is convenient.

According to the relay convenient for automatic assembly, the first convex part 217 is further arranged on one side of the outer side of one flange 211 of the coil frame 21, and the first convex part 217 is provided with the glue injection port; one side of the L-shape of the yoke is provided with a relief notch 245 at a position corresponding to the first protrusion 217. The structure of the invention can realize the coarse positioning of the yoke 24 by utilizing the matching of the abdicating notch 245 of the yoke 24 and the first convex part 217 of the coil frame, thereby facilitating the automatic assembly. Meanwhile, the protruding height of the first protrusion 217 on the outer side surface of one of the flanges 211 of the bobbin 21 is smaller than the thickness of the L-shaped side 241 of the yoke 24, which facilitates the fixing before the yoke 24 and the bobbin 21 are assembled, and improves the problem that the conventional structure cannot be fixed.

The invention discloses a relay convenient for automatic assembly, which adopts the technical scheme that two bending parts 611 and 612 are arranged on a movable spring, and when the two bending parts 611 and 612, the tail end of an injection molding main body 52 and a pushing arm 51 are projected on the same plane, the two bending parts 611 and 612 are both in the range from the tail end of the injection molding main body 52 to the pushing arm 51. The structure of the invention ensures that no interference occurs in the product assembly process, thereby facilitating automatic assembly. On the premise of ensuring the contact clearance, the miniature design is also facilitated.

The invention relates to a relay convenient for automatic assembly, which adopts two inserting convex parts 246 protruding downwards at the bottom of the other L-shaped edge 242 of a yoke 24, and an inserting notch 247 is formed between the two inserting convex parts 246; the base 3 is provided with a mounting groove 31 for mounting the magnetic circuit part; in the mounting groove 31, two inserting grooves 32 are provided at a position corresponding to the other side 242 of the L-shape of the yoke 24, a fitting protrusion 33 is formed between the two inserting grooves 32, and when the two inserting protrusions 246 of the other side 242 of the L-shape of the yoke 24 are correspondingly fitted with the two inserting grooves 32 of the base 3, the inserting notch 247 of the other side 242 of the L-shape of the yoke 24 is in interference fit with the fitting protrusion 33 of the base 3. According to the structure, the yoke 24 is tightly matched and fixed with the base 3, so that the dispensing fixation in the prior art is eliminated, the automatic assembly can be met, and the production process is simplified.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the scope of the disclosed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (10)

1. A relay facilitating automated assembly includes a magnetic circuit portion and a base; the magnetic circuit part is arranged on the base; the magnetic circuit part comprises a coil rack and an enameled wire; the coil rack comprises flanges at two ends and a winding window between the flanges at two ends; the enameled wire is wound in the winding window of the coil frame; the method is characterized in that: one edge of one of the two flanges of the coil rack is provided with a thinning part, and the area of the thinning part at least comprises an outer layer part of the winding thickness of the enameled wire in the winding window, so that the thinning part is utilized to give way to the coil rack deformation caused by the winding tension of the enameled wire, and the assembly error of related parts caused by the deformation of the coil rack is avoided.

2. The relay facilitating automated assembly of claim 1, wherein: the two flanges of the coil rack are respectively in a corresponding rectangular shape, the edge of one rectangular side of one flange is provided with a thinning part which penetrates through the whole rectangular side, and the width area of the thinning part at least comprises the outer layer part of the winding thickness of the enameled wire in the winding window.

3. The relay facilitating automated assembly of claim 2, wherein: the magnetic circuit part is horizontally arranged on the base; the magnetic circuit part also comprises an iron core, a yoke and an armature; the iron core is arranged in an iron core hole of the coil frame, the yoke iron is bent into an L shape, one L-shaped side of the yoke iron is fixed with one end of the iron core on one side of the outer side of one flange of the coil frame, and the other L-shaped side of the yoke iron is matched outside a winding window of the coil frame; the other end of the yoke is provided with a knife edge, and the armature is matched at the knife edge of the yoke and matched with the other end of the iron core; the thinning part of the coil rack is arranged at the bending part corresponding to the yoke iron, so that the bulge formed by bending the yoke iron is abducted by the thinning part.

4. The relay facilitating automated assembly of claim 3, wherein: the edge of one of the rectangular sides of one of the flanges of the bobbin is provided with a step on the outer side of the one of the flanges, and the thinned portion is constituted by a depressed portion at the step.

5. The relay facilitating automated assembly of claim 3, wherein: a first convex part is further arranged on one side of the outer side of one flange of the coil rack, and a glue injection port is formed in the first convex part; an abdicating notch is arranged at the position, corresponding to the first convex part, of one L-shaped side of the yoke iron, so that the positioning of the yoke iron is realized by utilizing the matching of the abdicating notch of the yoke iron and the first convex part of the coil rack; the protruding height of the first protrusion on the outer side surface of one of the flanges of the bobbin is smaller than the thickness of one side of the L-shape of the yoke.

6. The relay facilitating automated assembly of claim 3, wherein: the bottom of the other L-shaped side of the yoke is provided with two inserting convex parts which protrude downwards, and an inserting notch is formed between the two inserting convex parts; the base is provided with a mounting groove for mounting the magnetic circuit part; in the mounting groove, two inserting grooves are arranged at the position of the other side corresponding to the L shape of the yoke, a matching convex part is formed between the two inserting grooves, when the two inserting convex parts of the other side of the L shape of the yoke are correspondingly matched with the two inserting grooves of the base, the inserting notch of the other side of the L shape of the yoke is in interference fit with the matching convex part of the base.

7. The relay facilitating automated assembly of claim 3, wherein: the armature is bent into an L shape, the bent part of the armature is matched with a knife edge of the yoke iron through a pressure spring, and one L-shaped side of the armature is matched with the other end of the iron core; the other side of the L shape of the armature is provided with a pushing clamp and is positioned outside the other side of the L shape of the yoke; the relay also comprises a movable spring part, and the movable spring part comprises a movable spring piece and a movable contact fixed on the movable spring piece; the pushing clamp is provided with a pushing arm, and the tail end of the pushing arm is matched with the movable spring leaf.

8. The relay to facilitate automated assembly of claim 7, wherein: the pushing clamp is an injection molding piece which is formed on the other side of the L shape of the armature through injection molding, and the injection molding piece comprises an injection molding main body which is coated on the tail end of the other side of the L shape of the armature and the pushing arm which protrudes from the injection molding main body to the direction of the movable spring; the tail end of the injection molding main body is provided with a groove with an opening direction facing the other side of the L shape of the yoke; in the base, a blocking wall extending along the axis direction of the iron core is arranged at a position corresponding to the pointed position of the tail end of the injection molding main body in a side wall corresponding to one end of the iron core, and a second convex part in clearance fit with a groove of the injection molding main body is arranged at the tail end of the blocking wall.

9. The relay to facilitate automated assembly of claim 8, wherein: and a third convex part which protrudes outwards is further arranged on one surface of the other side of the L shape facing the yoke in the injection molding main body.

10. The relay to facilitate automated assembly of claim 8, wherein: and two bending parts are arranged on the movable spring leaf, and when the two bending parts, the tail end of the injection molding main body and the projection of the pushing arm on the same plane are projected, the two bending parts are all located in the range from the tail end of the injection molding main body to the pushing arm.

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