CN112086318A - Relay convenient to automatic assembly - Google Patents

Abstract

The invention discloses a relay convenient for automatic assembly, comprising a magnetic circuit part and a base; the magnetic circuit part is mounted on the base; the magnetic circuit part includes a coil frame and an enameled wire; The winding window between the flange and the flanges at both ends; the enameled wire is wound in the winding window of the coil frame; an edge of one of the two flanges of the coil frame is provided with a thinned part , and the area of the thinned part at least includes 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 degree of automation, low production cost and simple production process.

Description

A relay for easy automated assembly

technical field

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

Background technique

The relay usually includes a magnetic circuit part, a contact part, a push part and a base, the magnetic circuit part and the contact part are respectively mounted on the base, the contact part includes a moving spring part and a static spring part, and the pushing part is connected between the magnetic circuit part and the moving spring part. During the operation of the magnetic circuit part, the moving spring part is moved by the pushing part, so that the moving contact of the moving spring part and the static contact of the static spring part are contacted or separated. The relay uses the armature in the magnetic circuit part. When the magnetic circuit part is working, it cooperates with the iron core in the magnetic circuit part to drive the pushing part to perform corresponding actions to drive the moving spring part to move. FIG. 1 is an exploded schematic diagram 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 part 102, a moving spring part 103, a static spring part 104 and a pushing part 105, wherein, The magnetic circuit part 102 is mounted on the base 101 in a horizontal manner (that is, the axis of the iron core is arranged horizontally), the moving spring part 103 and the static spring part 104 are respectively inserted on the base 101, and the pushing part 105 is connected to the armature of the magnetic circuit part. Between 106 and the moving spring part 102, this kind of relay in the prior art mainly has the following drawbacks:

1. Due to the winding tension of the enameled wire, the coil frame causes the coil deformation to seriously affect the overall mechanical parameter stability of the product, which in turn affects the product performance; the prior art requires manual correction of the moving spring, which affects the automated assembly of the product;

2. The weight of the magnetic circuit part 102 is very heavy, and it needs to be glued and fixed with the base 101 to strengthen the anti-drop performance of the product, increase the glue dispensing process, and increase the possibility of glue pollution. The production line process is complicated and the degree of automation is low, which increases the The overall cost of the product; as shown in FIG. 1 , a glue dispensing port 107 is also set on the base 101, which increases the difficulty of making the base 101;

3. The left and right welding parts of the coil are two symmetrical parts. Since the two parts have different shapes but are very similar, it is easy to mix materials on site, which is easy to cause defects and cannot be automated production.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a relay which is convenient for automatic assembly. Through structural improvement, automatic assembly can be realized, and it has the characteristics of high degree of automation, low production cost and simple production process.

The technical solution adopted by the present invention to solve the technical problem is: a relay convenient for automatic assembly, comprising a magnetic circuit part and a base; the magnetic circuit part is mounted on the base; the magnetic circuit part includes a coil frame and an enameled wire ; The coil frame includes flanges at both ends and a winding window between the flanges at both ends; the enameled wire is wound in the winding window of the coil frame; one of the two flanges of the coil frame One edge is provided with a thinned part, and the area of the thinned part at least includes the outer layer part of the winding thickness of the enameled wire in the winding window, so as to use the thinned part to the enameled wire winding tension caused by the winding tension. The deformation of the coil frame makes way to avoid the assembly error of the related components caused by the deformation of the coil frame.

The two flanges of the coil frame are respectively in corresponding rectangular shapes, and an edge of one of the rectangular sides of one of the flanges is provided with a thinned part that runs through the entire rectangular side, and the width of the thinned part is at least The outer layer portion containing the winding thickness of the enameled wire in the winding window.

The magnetic circuit part is horizontally installed on the base; the magnetic circuit part also includes an iron core, a yoke and an armature; the iron core is installed in the iron core hole of the coil frame, and the yoke is bent into a L-shaped shape, one side of the L-shaped yoke is fixed with one end of the iron core on the outer side of the one flange of the coil frame, and the other side of the L-shaped yoke is matched with the coil frame outside the winding window of the yoke; the other end of the yoke is set as a knife edge, the armature is matched with the knife edge of the yoke and is matched with the other end of the iron core; the thinned part of the coil frame is set at the corresponding At the bend of the yoke, use the thinned part to make way for the bulge formed by the bending of the yoke.

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 formed by a sunken portion at the step.

The outer side of one of the flanges of the coil frame is also provided with a first convex portion, and the first convex portion is provided with a glue injection port; the L-shaped side of the yoke is at a position corresponding to the first convex portion A vacant notch is provided to realize the positioning of the yoke by the cooperation between the vacant notch of the yoke and the first convex part of the coil frame; the first convex part is on the outer side of one of the flanges of the coil frame The protruding height is less than the thickness of one side of the L-shape of the yoke.

The bottom of the other side of the L-shape of the yoke is provided with two plugging protrusions protruding downward, and a plugging notch is formed between the two plugging protrusions; The installation groove of the road part; in the installation groove, two insertion grooves are provided at the position corresponding to the other side of the L-shaped yoke, and a matching convex portion is formed between the two insertion grooves. When the two plug-in protrusions on the other side of the L-shaped yoke are matched with the two plug-in grooves of the base, the plug-in grooves on the other side of the L-shaped yoke are in contact with the base. The mating protrusions are in an interference fit.

The armature is bent into an L-shaped shape, the bending part of the armature is matched with the knife edge of the yoke through a compression spring, and one side of the L-shaped 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 push card, which is located outside the other side of the L-shape of the yoke; the relay also includes a moving spring part, and the moving spring part includes a moving reed and a fixed on the moving spring. The movable contact on the reed; the push clip is provided with a push arm, and the end of the push arm is matched with the movable reed.

The push card is an injection molded part formed on the other side of the L-shaped armature by injection molding. The push arm protruding in the direction of the movable spring; the end of the injection molded body is provided with a groove with an opening direction facing the other side of the L-shaped yoke; in the base, one end of the iron core is In the corresponding side wall, at the position corresponding to the end of the injection molding body, there is a blocking wall extending along the axis direction of the iron core, and the end of the blocking wall is provided with a recess that fits the injection molding body. the second protrusion of the groove.

In the injection molding body, a third convex portion protruding outward is further provided on the side facing the other side of the L-shape of the yoke.

The movable reed is provided with two bending parts, and when the two bending parts and the end of the injection molding body and the projection of the push arm on the same plane, the two bending parts both fall on the injection molding body. the range between the end of the push arm and the push arm.

Compared with the prior art, the beneficial effects of the present invention are:

1. The present invention adopts a thinned portion that runs through the entire rectangular side at the edge of one of the rectangular sides of one of the flanges of the coil frame, and the width of the thinned portion includes at least the enameled wire at the winding window. in the outer part of the winding thickness. In this structure of the present invention, after the edge of the coil frame is thinned, the deformation of the coil frame is concentrated at the thinned edge after the coil frame is wound. Make way to avoid the assembly error of related components caused by the deformation of the coil frame; the thinned part is provided in the present invention, which will not affect the overall mechanical parameters, and can reduce manual correction, thereby improving the degree of automation.

2. In the present invention, since the thinned part of the coil frame is arranged at the bending position corresponding to the yoke, the thinned part can also be used to make way for the bulge formed by bending the yoke, which is convenient for automatic assembly.

3. Since the present invention adopts a first convex part on the outer side of one of the flanges of the coil frame, the first convex part is provided with a glue injection port; the L-shaped side of the yoke is corresponding to the The position of the first convex portion is provided with a vacant notch. With this structure of the present invention, the yoke can be roughly positioned by using the cooperation between the yoke's vacant notch and the first convex portion of the coil frame, which is convenient for automatic assembly.

4. Since the present invention adopts two bending parts on the movable reed, when the two bending parts and the end of the injection molding body, the projection of the push arm on the same plane, the two bending parts are falls within the range between the end of the injection-molded body and the push arm. The structure of the present invention prevents interference during product assembly, thereby facilitating automated assembly.

5. In the present invention, two plugging protrusions protruding downward are provided at the bottom of the other side of the L-shaped yoke, and a plugging notch is formed between the two plugging protrusions; There is an installation groove for installing the magnetic circuit part; in the installation groove, two insertion grooves are provided at a position corresponding to the other side of the L-shape of the yoke, and the two insertion grooves are formed between the two insertion grooves. When the two plug-in protrusions on the other side of the L-shape of the yoke are matched with the two plug-in grooves of the base correspondingly, the plug-in grooves on the other side of the L-shape of the yoke The mouth is in interference fit with the matching convex part of the base. In this structure of the present invention, the yoke is clamped and fixed with the base, which eliminates the glue dispensing and fixing in the prior art, can satisfy automatic assembly, and simplify the production process.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, a relay of the present invention that facilitates automatic assembly is not limited to the embodiments.

Description of drawings

Fig. 1 is the partial structure schematic diagram of the relay of the prior art;

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

Fig. 3 is the three-dimensional structure (partial) schematic diagram of the embodiment of the present invention;

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

Fig. 5 is the three-dimensional structure (part) exploded schematic diagram of the embodiment of the present invention;

Fig. 6 is a three-dimensional (partial) exploded schematic diagram of an embodiment of the present invention (rotated at an angle relative to Fig. 5);

Fig. 7 is the partial structural schematic diagram of the magnetic circuit part of the embodiment of the present invention;

8 is a schematic three-dimensional structural diagram of a yoke according to an embodiment of the present invention;

FIG. 9 is a schematic three-dimensional structure diagram of the armature according to the embodiment of the present invention;

FIG. 10 is a schematic three-dimensional structure diagram of the armature according to the embodiment of the present invention (rotated at an angle relative to FIG. 9 );

FIG. 11 is a schematic three-dimensional structure diagram of the base of the embodiment of the present invention;

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

Detailed ways

Example

Referring to FIGS. 2 to 12 , a relay convenient for automatic assembly of the present invention includes a magnetic circuit part 2 and a base 3 ; in this embodiment, the relay is a snap-fit structure, and the magnetic circuit part 2 is a horizontal installation On the base 3; the magnetic circuit part 2 includes a coil frame 21 and an enameled wire 22; the coil frame 21 includes flanges 211 and 212 at both ends and a winding window 213 between the flanges at both ends; the enameled wire 22 is wound in the winding window 213 of the coil former 21; the two flanges 211 and 212 of the coil former 21 are respectively in corresponding rectangular shapes, and an edge of one of the rectangular sides of one of the flanges 211 is provided with a through-hole. The thinned part 214 of the entire rectangular side, and the width of the thinned part 214 includes at least the outer layer part of the winding thickness of the enameled wire 22 in the winding window 213, so that the thinned part 214 can be used for the enameled wire 22. The deformation of the bobbin 21 caused by the winding tension is replaced, so as to avoid assembly errors of related components caused by the deformation of the bobbin 21 .

In this embodiment, the magnetic circuit part 2 further includes an iron core 23, a yoke 24 and an armature 25; the iron core 23 is installed in the iron core hole 215 of the coil frame 21, and the yoke 24 is bent into an L-shape The L-shaped side 241 of the yoke 24 is fixed with one end of the iron core 23 on the outer side of the one flange 211 of the coil frame, and the L-shaped other side 242 of the yoke 24 Fitted outside the winding window 213 of the coil frame 21; the other end of the yoke 24 is set as a knife edge 243, and the armature 25 is matched with the knife edge 243 of the yoke and is matched with the other end of the iron core 23. Matching; the thinned portion 214 of the coil former 21 is provided at a position corresponding to the bending of the yoke 24 , so that the bulge 244 formed by the bending of the yoke 24 can be replaced by the thinned portion.

In this embodiment, the magnetic circuit part 2 further includes a left soldering piece 261 and a right soldering piece 262, and the structure of the left soldering piece 261 and the right soldering piece 262 is completely the same, so as to avoid the risk of mixing materials and satisfy the automatic production.

In this embodiment, a step 216 is provided on an edge of one of the rectangular sides of one of the flanges 211 of the coil former 21 on the outer side of the one of the flanges 211 , and the thinned portion 214 is formed by a The sunken part constitutes.

In this embodiment, the outer side of one of the flanges 211 of the coil former 21 is further provided with a first convex portion 217, and the first convex portion 217 is provided with a glue injection port; the L-shaped yoke 24 is One side 241 is provided with an escape notch 245 at a position corresponding to the first convex portion 217 , so as to utilize the cooperation between the escape notch 245 of the yoke 24 and the first convex portion 217 of the coil frame 21 to realize the positioning of the yoke 24 .

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

In this embodiment, the bottom of the other side 242 of the L-shape of the yoke 24 is provided with two downwardly protruding plugging protrusions 246, and a plugging recess 247 is formed between the two plugging protrusions 246; The base 3 is provided with an installation groove 31 for being inserted into the magnetic circuit part 2; in the installation groove 31, two insertion grooves are provided at positions corresponding to the other side 242 of the L-shape of the yoke 24 32. A matching protrusion 33 is formed between the two insertion grooves 32, and the two insertion protrusions 246 of the other side 242 of the L-shape of the yoke 24 correspond to the two insertion grooves 32 of the base During mating, the insertion recess 247 of the other side 242 of the L-shape of the yoke is in interference fit with the mating protrusion 33 of the base 3 .

In this embodiment, the armature 25 is bent into an L-shaped shape, and the bending part of the armature 25 is fitted at the knife edge 243 of the yoke 24 through a compression spring 4 , and the L-shaped side 251 of the armature 25 Matching with the other end of the iron core 23; the other side 252 of the L-shape of the armature 25 is provided with a push card 5, and is located outside the other side 242 of the L-shape of the yoke 24; the The relay also includes a moving spring part 6, the moving spring part 6 includes a moving reed 61 and a moving contact 62 fixed on the moving reed; the push card 5 is provided with a push arm 51, the end of the push arm 51 and the The movable reeds 61 are matched with each other.

In this embodiment, the push card 5 is an injection molded part that is injection-molded on the other side 252 of the L-shape of the armature 25 . The injection-molded body 52 at the end and the push arm 51 protruding from the injection-molded body in the direction of the moving spring; the end of the injection-molded body 52 is provided with a groove whose opening direction is toward the other side of the L-shape of the yoke 521; In the base 3, in the side wall 34 corresponding to one end of the iron core, at the position corresponding to the end of the injection molding body 52, there is a blocking wall extending along the axis direction of the iron core 35. A second protruding portion 351 that is clearance-fitted with the groove 521 of the injection molding body is provided at the end of the blocking wall.

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

In the present invention, the push clip 5 is formed by injection molding on the armature 25, so that the armature 25 and the push clip 5 are integrated, and the assembly precision can be improved. At the same time, a convex portion 522 is designed on the side of the push card 5 towards the yoke 24 to replace the existing copper nail parts, so that a natural air gap is formed between the armature 25 and the yoke 24 to avoid the formation of magnetic short circuits and improve the utilization of the magnetic field strength of the relay. efficiency, reducing parts and simplifying assembly. In the present invention, an injection molding positioning hole can also be provided on the armature, which is used for positioning the armature during injection molding of the insert. In the present invention, the armature 25 is integrated with the push card 5 by injection molding, so that the action of the armature 25 is directly transmitted to the moving reed 61 , which has higher reliability compared to the motion transmission and driving of multiple parts.

The existing relays rely on the compression spring 4 to limit the armature 25. If the impact force is too large, the fatigue strength of the compression spring 4 is exceeded, and the compression spring 4 is prone to plastic deformation or even fatigue fracture, resulting in failure of the relay. In the present invention, a groove 521 is provided at the end of the push card 5 away from the armature 25, and a second convex portion 351 is provided on the baffle wall 35 of the base 3. The second convex portion 351 forms a clearance fit with the groove 521, so as to ensure the push card 5 Movement is flexible and smooth. When the relay is impacted by external force, the second convex portion 351 of the blocking wall 35 abuts against the groove 521 on the push card 5 to limit the push card 5 and the armature 25, the angle change of the compression spring 4 becomes smaller, and the compression spring 4 does not It is easy to fatigue plastic deformation or fatigue fracture, which prolongs the service life of the compression spring 4 . When the external impact force disappears, the elastic restoring force of the compression spring 4 makes the second convex portion 351 of the baffle wall 35 and the groove 521 form a clearance fit again, preventing the second convex portion 351 and the groove 521 from contacting and rubbing for a long time to generate debris , thereby interfering with the action of pushing the card 5, and even debris will affect the contact of the contacts. At the same time, the cooperation of the groove 521 and the second convex portion 351 also increases the creepage distance and the air gap between the yoke 24 and the moving spring 5 .

In this embodiment, the moving spring part 6 further includes a moving spring lead-out piece 63, the moving spring lead-out piece 63 is inserted on the base 3, one end of the moving spring piece 61 is fixed to the moving contact 62, and the other end of the moving spring piece 61 is fixedly connected The moving spring lead-out piece 63; the moving spring piece 61 is provided with two bending parts, namely the first bending part 611 and the second bending part 612, the first bending part 611, the second bending part 612 and the When the projection of the end of the injection molding body 52 and the push arm 51 on the same plane, the first bending part 611 and the second bending part 612 both fall between the end of the injection molding body 52 and the push arm 51 . 4, the first bending part 611 is located under the pushing convex part (ie the pushing arm 51) of the pushing card, and the second bending part 612 is located at the end of the pushing card (ie the injection molding body 52). end) above.

A relay of the present invention that is convenient for automatic assembly adopts that the edge of one of the rectangular sides of one of the flanges 211 of the coil frame 21 is provided with a thinned portion 214 that runs through the entire rectangular side, and the width of the thinned portion 214 is The area contains at least the outer portion of the winding thickness of the enameled wire 22 in the winding window. In this structure of the present invention, after the edge of the coil former 21 is thinned, after the coil former 21 is wound, the deformation is concentrated at the thinned edge. The coil frame 21 is deformed to give way, so as to avoid assembly errors of related components caused by the deformation of the coil frame 21; the thinned part 214 is provided in the present invention, which will not affect the overall mechanical parameters, and can reduce manual correction, thereby improving the degree of automation.

In the relay of the present invention, which is convenient for automatic assembly, the thinned part 214 of the coil former 21 is arranged at the bending position corresponding to the yoke 24, and the bulge 244 formed by bending the thinned part 214 to the yoke can also be used. Make way for automated assembly.

A relay of the present invention that is convenient for automatic assembly adopts that a first convex portion 217 is further provided on the outer side of one of the flanges 211 of the coil frame 21, and the first convex portion 217 is provided with a glue injection port; the The L-shaped side of the yoke is provided with an escape notch 245 at a position corresponding to the first convex portion 217 . With this structure of the present invention, the yoke 24 can be roughly positioned by the cooperation between the yoke 24 and the first convex portion 217 of the coil frame, which is convenient for automatic assembly. At the same time, the protruding height of the first protrusion 217 on the outer side of one of the flanges 211 of the coil frame 21 is smaller than the thickness of the L-shaped side 241 of the yoke 24 , which facilitates the assembly of the yoke 24 and the coil frame 21 It is used for fixing before, to improve the problem that the existing structure cannot be fixed.

A relay of the present invention which is convenient for automatic assembly adopts two bending parts 611 and 612 on the moving reed. When projected on the same plane, the two bent portions 611 and 612 both fall within the range between the end of the injection molded body 52 and the push arm 51 . The structure of the present invention prevents interference during product assembly, thereby facilitating automated assembly. On the premise of ensuring the contact gap, it is also conducive to miniaturized design.

A relay of the present invention that is convenient for automatic assembly adopts that the bottom of the other side 242 of the L-shape of the yoke 24 is provided with two downwardly protruding plug-in protrusions 246, and between the two plug-in protrusions 246 A socket 247 is formed; the base 3 is provided with a mounting groove 31 for fitting into the magnetic circuit part; Two insertion grooves 32 , a matching protrusion 33 is formed between the two insertion grooves 32 , and the two insertion protrusions 246 of the other side 242 of the L-shape of the yoke 24 are connected to the two sockets of the base 3 . When the respective insertion grooves 32 are matched, the insertion recess 247 of the other side 242 of the L-shape of the yoke 24 is in an interference fit with the matching convex portion 33 of the base 3 . In this structure of the present invention, the yoke 24 is clamped and fixed with the base 3 , which eliminates the glue dispensing and fixing in the prior art, can satisfy automatic assembly, and simplify the production process.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment. . Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention should fall within the protection scope of the technical solutions of the present invention.

Claims (10)

1. A relay convenient for automatic assembly, comprising a magnetic circuit part and a base; the magnetic circuit part is mounted on the base; the magnetic circuit part comprises a coil frame and an enameled wire; the coil frame includes flanges at both ends and The winding window between the flanges at both ends; the enameled wire is wound in the winding window of the coil frame; it is characterized in that: an edge of one of the two flanges of the coil frame is provided with a reducing a thin part, and the area of the thinned part at least includes the outer layer part of the winding thickness of the enameled wire in the winding window, so that the thinned part can be used to make room for the deformation of the coil frame caused by the winding tension of the enameled wire, Thus, the assembly error of the relevant components caused by the deformation of the coil frame is avoided. 2 . The relay according to claim 1 , wherein the two flanges of the coil frame are respectively corresponding rectangular shapes, and an edge of one of the rectangular sides of one of the flanges is provided with 2 . The thinned portion runs through the entire rectangular side, and the width of the thinned portion includes at least the outer layer portion of the winding thickness of the enameled wire in the winding window. 3. The relay according to claim 2, characterized in that: the magnetic circuit part is horizontally mounted on the base; the magnetic circuit part further comprises an iron core, a yoke and an armature; The iron core is installed in the iron core hole of the coil frame, the yoke is bent into an L-shaped shape, and one side of the L-shaped yoke is connected to the iron core on the outer side of the one flange of the coil frame. One end of the yoke is fixed, and the other side of the L-shape of the yoke is fitted outside the winding window of the coil frame; the other end of the yoke is set as a knife edge, and the armature is fitted at the knife edge of the yoke and is connected with the edge of the yoke. The other end of the iron core is matched with each other; the thinned part of the coil frame is arranged at the bending position corresponding to the yoke, so that the bulge formed by the bending of the yoke can be replaced by the thinned part. 4. The relay according to claim 3, characterized in that: the edge of one of the rectangular sides of one of the flanges of the coil frame is provided with a step on the outer side of the one of the flanges, The thinned portion is constituted by a sunken portion at the step. 5 . The relay according to claim 3 , wherein the outer side of one of the flanges of the coil frame is further provided with a first convex portion, and the first convex portion is provided with a glue injection port. 6 . The L-shaped side of the yoke is provided with a vacant notch at the position corresponding to the first convex portion, so as to utilize the cooperation of the vacant notch of the yoke and the first convex portion of the coil frame to realize the yoke. Positioning; the protruding height of the first protruding portion on the outer side of one of the flanges of the coil frame is smaller than the thickness of the L-shaped side of the yoke. 6. The relay according to claim 3, characterized in that: the bottom of the other side of the L-shape of the yoke is provided with two downwardly protruding plug-in protrusions, and the two plug-in protrusions A socket is formed between the parts; the base is provided with a mounting slot for mounting the magnetic circuit part; in the mounting slot, two sockets are provided at the position corresponding to the other side of the L-shape of the yoke When the two insertion grooves on the other side of the L-shaped yoke are matched with the two insertion grooves of the base, the The insertion notch on 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 according to claim 3 , wherein the armature is bent into an L-shaped shape, and the bent part of the armature is fitted at the knife edge of the yoke through a compression spring, so that the One side of the L-shape 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 push card and is outside the other side of the L-shape of the yoke; the relay It also includes a moving spring part, the moving spring part includes a moving spring plate and a moving contact fixed on the moving spring plate; the push clip is provided with a push arm, and the end of the push arm is matched with the moving spring plate. 8 . The relay according to claim 7 , wherein the push card is an injection-molded part on the other side of the L-shape of the armature by injection molding, and the injection-molded part includes an injection-molded part covering the armature. 9 . The injection-molded body at the other end of the L-shaped armature and the push arm protruding from the injection-molded body toward the moving spring; the end of the injection-molded body is provided with an L-shaped opening with an opening direction toward the yoke The groove on the other side of the base; in the base, in the side wall corresponding to one end of the iron core, at the position corresponding to the end of the injection-molded main body, there is a groove extending along the axis of the iron core. The blocking wall is provided at the end of the blocking wall with a second protruding portion that is clearance-fitted with the groove of the injection-molded main body. 9. The relay according to claim 8, characterized in that: in the injection-molded main body, a third protrusion protruding outward is further provided on the side facing the other side of the L-shape of the yoke department. 10. The relay according to claim 8, characterized in that: the movable reed is provided with two bent parts, the two bent parts and the end of the injection-molded body, the push arm in When projected on the same plane, the two bending parts both fall within the range between the end of the injection-molded body and the push arm.

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