A snap-on relay with multiple static springs

Abstract

The present invention discloses a snap-on relay with multiple static springs, comprising multiple static springs and a base; the static springs comprise static spring sheets and static contacts; the multiple static springs are divided into one static spring group or more than one static spring group; the static spring sheets in each static spring group are arranged in a row along the width direction of the static spring sheets, and the static spring sheets in the static spring group are insulated and connected to form an integral component by a first injection molded part formed by injection molding, and the first injection molded part is coated on the middle of the static spring sheets; a mounting groove is provided in the base, the integral component is installed in the mounting groove, and convex buds are respectively provided on both side ends of the integral component, and when the integral component is installed in the mounting groove, the convex buds on both side ends of the integral component are interference-matched with the mounting groove. The present invention has the characteristics of small product volume and easy miniaturization, can reduce the difficulty of product manufacturing, and improve assembly consistency.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a snap-on relay with a plurality of static springs. Background Art

[0002] A snap-on relay in the prior art includes a plurality of static springs, such as Figure 1 As shown, Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a snap-fit ​​relay of the prior art. The snap-fit ​​relay includes a movable spring armature component 100, a magnetic circuit part 200, a plurality of static springs 300 and a base 400. The magnetic circuit part 200 is mounted on the base. The movable spring armature component 100 is matched with the magnetic circuit part 200. The static spring 300 is composed of a static spring piece 301 and a static contact 302. The static contact 302 is fixed on the static spring piece 301. The static spring 300 is usually inserted into the base 400. The base 400 is provided with a plurality of slots 401 for inserting the static spring pieces 301 respectively. Each static spring piece 301 is provided with a convex bulge 303. When the static spring piece 301 is inserted into the slot 401 of the base 400, the static spring piece 301 is fixed to the base 400 through the interference fit between the convex bulge 303 of the static spring piece 301 and the slot 401 of the base 400. The snap-fit ​​relay has the following disadvantages:

[0003] First, it is not conducive to the miniaturization of the product. This is because the base 400 needs to provide fixed support for the static spring 300. The fixation of the static spring usually needs to meet certain pulling force requirements. When the base 400 is inserted into the static spring sheet 301, if the wall thickness of the slot 401 of the base 400 is too thin, it will cause the base to crack and cause the creepage distance between the static springs to be insufficient. Therefore, the part of the base that supports the insertion of the static spring needs to have a certain plastic wall thickness to avoid the base cracking and insufficient creepage distance when the static spring is inserted into the base. In this way, the base will be larger in size.

[0004] Secondly, it is not convenient to manufacture the product, because a plurality of slots 401 need to be provided on the base 400, so that the base has many plastic walls, resulting in a complex base structure. The product design must consider preventing plastic shrinkage and deformation and injection dissatisfaction during injection molding of the base structure, and also needs to consider the balance of the wall thickness of the base structure, which will increase the difficulty of product manufacturing.

[0005] Third, the consistency of product assembly is poor. Since multiple static springs 300 need to be inserted into the base 400 respectively, the flatness difference between the static spring pieces 301 is easily caused during the insertion. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a snap-on relay with multiple static springs. Through structural improvement, the product has the characteristics of small size and easy miniaturization, which can reduce the difficulty of product manufacturing and improve assembly consistency.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a snap-on relay with multiple static springs, including multiple static springs and a base; the static springs include static spring sheets and static contacts, the upper part of the static spring sheets fixes the static contacts, and the lower part of the static spring sheets is set as lead pins; the multiple static springs are divided into a static spring group or more than one static spring group; the static spring sheets in each static spring group are arranged in a row along the width direction of the static spring sheets, and the static spring sheets in the static spring group are insulated and connected to form an integral component through a first injection molded part formed by injection molding, and the first injection molded part covers the middle part of the static spring sheets; the base is provided with a mounting groove, the integral component is installed in the mounting groove, and the two side ends of the integral component are respectively provided with convex buds, and when the integral component is installed in the mounting groove, the convex buds at the two side ends of the integral component are interference fit with the mounting groove.

[0008] In the overall component, the middle parts of the two outer sides of the two static spring sheets at the two side ends are respectively exposed outside the first injection molded part, and the convex buds at the two side ends of the overall component are respectively arranged in the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component.

[0009] Barbs are also provided at the convex bulges in the middle of the two outer sides of the two static spring sheets at the two side ends of the integral component to prevent withdrawal when the convex bulges at the two side ends of the integral component are interference fit with the installation groove.

[0010] The middle of the static spring sheet is also provided with at least one through hole penetrating the thickness, and the first injection molded part is filled in the through hole of the static spring sheet to increase the connection strength between the first injection molded part and the static spring sheet.

[0011] The installation groove is a through groove adapted to the first injection molded part, and the two side ends of the installation groove are respectively provided with limit grooves corresponding to the thickness of the static spring sheet, and the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component are respectively adapted in the limit grooves; the convex parts in the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component are interference fit with the limit grooves.

[0012] The upper part of the static spring sheet is also provided with a protrusion in the width direction that protrudes further outward than the middle part of the static spring sheet. In the base, guide grooves are also provided above the two side ends corresponding to the installation grooves. The protrusions on the upper parts of the two outer sides of the two static spring sheets at the two side ends in the overall assembly are adapted in the guide grooves of the base.

[0013] In the static spring sheet, a first step with the step surface facing downward is provided at a position corresponding to the lower middle part; the bottom of the mounting groove of the base is also provided with a sink groove, and the first step of the static spring sheet is matched in the sink groove of the base, and the bottom surface of the sink groove is provided with a through hole that allows the lower part of the static spring sheet to pass through.

[0014] The snap-on relay also includes a magnetic circuit part, which includes a yoke, a plug-in protrusion is provided at the bottom of the yoke, and the base is provided with a slot for matching the plug-in protrusion of the yoke, one side of the plug-in protrusion of the yoke is provided with a barb for interference fit with the slot of the base, and a through hole for dispensing glue is provided in the bottom of the slot on the other side corresponding to the plug-in protrusion of the yoke.

[0015] The snap-on relay also includes a spring-armature component that matches the magnetic circuit part, and the spring-armature component includes an armature, a restoring spring, a second injection molded part and a spring; the restoring spring is L-shaped, and the upper part of the armature is provided with a matching portion for matching with the blade of the yoke of the magnetic circuit part of the relay; one side of the L-shaped restoring spring is riveted and fixed on the armature, and one side of the armature can match with the core pole surface of the magnetic circuit part of the relay; the two sides of the armature are respectively provided with a pair of fingers that face away from the armature. The second injection-molded part covers the other side and the side surface of the armature to retain one side of the armature so that it can keep matching with the pole surface of the iron core, and the second injection-molded part completely covers the bent portion so that the second injection-molded part can be firmly combined with the armature; in the second injection-molded part, on the other side corresponding to the armature, there is also a notch to give way to the restoring spring leaf and an un-injected portion to give way to the matching portion of the yoke; the second injection-molded part also completely covers the top of the movable spring.

[0016] A first through hole is also provided in the bending portion of the armature, and the second injection molded part completely fills the first through hole of the bending portion of the armature; a second through hole is provided on the top of the movable spring, and the second injection molded part completely fills the second through hole of the movable spring.

[0017] Wings protruding outward are respectively provided on both sides of the upper and middle part of the armature, and a slit extending upward from the bottom end is provided on the inner edge of the wing. The lower part of the wing is bent upward by using the slit to form a bending part of the armature; the bending part forms a bend of 90 degrees or close to 90 degrees relative to the wing.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The present invention divides a plurality of static springs into a static spring group or more than one static spring group; and the static spring pieces in each static spring group are arranged in a row along the width direction of the static spring piece, and the static spring pieces in the static spring group are insulated and connected to form an integral component by a first injection molded part formed by injection molding, and the first injection molded part covers the middle part of the static spring piece; the base is provided with a mounting groove, the integral component is installed in the mounting groove, and the two side ends of the integral component are respectively provided with convex buds, and when the integral component is installed in the mounting groove, the convex buds at the two side ends of the integral component are interference fit with the mounting groove. In the structure of the present invention, multiple static spring terminals are installed in the base by integrated insert injection molding, which greatly reduces the space between the static spring terminals while ensuring the bearing strength of the base on the static spring terminals, so that the volume of the product can be greatly reduced, which is conducive to the miniaturization of the relay product; the integrated insert injection molding of multiple static spring terminals makes the structure of the base simple, which can not only improve the injection molding yield of the base, but also simplify the assembly process and improve the assembly accuracy of the static spring terminals. At the same time, it can also avoid the flatness difference between the static springs caused by the prior art that each static spring is inserted into the base separately.

[0020] 2. The present invention adopts the method of setting the convex buds at both ends of the integral component in the middle of both outer sides of the two static spring pieces at both ends of the integral component, and the convex buds at the middle of both outer sides of the two static spring pieces at both ends of the integral component are also provided with barbs. In this structure of the present invention, the static spring injection-molded integrated structure is fixed by the barbs of the static spring terminals at both ends and the base through interference fit, and the plastic chips generated by the interference fit can be just collected on the base, avoiding the influence of the plastic chips entering the interior of the relay on the relay performance.

[0021] 3. The present invention adopts the method of providing limiting grooves corresponding to the thickness of the static spring pieces at both side ends of the installation groove, and providing guide grooves above the two side ends of the installation groove in the base. The middle parts of the two outer sides of the two static spring pieces at the two side ends of the overall component are respectively adapted to the limiting grooves, and the protruding parts of the upper parts of the two outer sides of the two static spring pieces at the two side ends of the overall component are adapted to the guide grooves of the base. This structure of the present invention realizes the limitation of the overall component in the front, back, left and right of the relay through the cooperation of the limiting grooves, the guide grooves and the two static spring pieces at the two side ends of the overall component, avoids tilting during the installation of the static spring injection molding body, and improves the assembly consistency.

[0022] 4. The present invention adopts a method in which a barb is provided on one side of the plug-in protrusion of the yoke to be interference-matched with the slot of the base, and a through hole for dispensing glue is provided in the bottom of the slot corresponding to the other side of the plug-in protrusion of the yoke. This structure of the present invention utilizes the slot to have a through hole communicating with the outside world, so that dispensing glue can be achieved, and the position of the barb is staggered with the position of the through hole, so that the plastic scraps generated by the barb and the base can be stored in the groove of the slot, and then the plastic scraps are fixed between the yoke fixing part and the base by dispensing glue, thereby preventing the plastic scraps from entering the interior of the relay and affecting the relay performance.

[0023] 5. The present invention adopts a bending part that is bent in the direction away from one side of the armature on both sides of the armature, and the second injection molded part covers the other side and the side of the armature to retain one side of the armature so that it can keep matching with the core pole surface, and the second injection molded part completely covers the bending part so that the second injection molded part can be firmly combined with the armature; in the second injection molded part, on the other side corresponding to the armature, there is also a notch that gives way to the restoring spring and an uninjected part that gives way to the matching part of the yoke; the second injection molded part also completely covers the top of the movable spring. This structure of the present invention, by setting the bending parts on both sides of the armature, enables the second injection molded part and the armature to be effectively combined together, and the armature and the movable spring are injection molded into one piece by the second injection molded part, which not only realizes the pressure-resistant isolation between the armature and the movable spring, but also has the characteristics of small component volume, simple production and assembly, easy to realize automated production, small influence of assembly cumulative tolerance between multiple groups of movable springs, and good parameter consistency of mass production of finished relays.

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the snap-on relay with multiple static springs of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of a snap-on relay in the prior art;

[0026] Figure 2 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (excluding the housing);

[0027] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention (excluding the housing);

[0028] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the overall components of an embodiment of the present invention;

[0029] Figure 5 is a front view of the overall assembly of an embodiment of the present invention;

[0030] Figure 6 is along Figure 5 The cross-sectional view of line AA in the figure;

[0031] Figure 7 is a top view of the overall assembly of an embodiment of the present invention cooperating with the base;

[0032] Figure 8 is along Figure 7 The cross-sectional view of line BB in FIG.

[0033] Fig. 9 is along Figure 7 Cross-sectional view of line CC in;

[0034] Fig.10 is a front view of an embodiment of the present invention (without the housing);

[0035] Fig.11 is along Fig.10 A cross-sectional view of the DD line in FIG.

[0036] Fig.12 is a schematic diagram of the three-dimensional structure of a movable spring armature component of an embodiment of the present invention;

[0037] Fig.13 is a schematic diagram of a three-dimensional structure explosion of a movable spring armature component of an embodiment of the present invention;

[0038] Fig.14 is a rear view of a movable spring armature component of an embodiment of the present invention;

[0039] Fig.15 is along Fig.14 Cross-sectional view of line EE in FIG. DETAILED DESCRIPTION

[0040] Example

[0041] See also Figures 2 to 15As shown, a snap-on relay with multiple static springs of the present invention comprises a magnetic circuit part 1, a dynamic spring armature component 2, multiple static springs 3 and a base 4; the static spring 3 comprises a static spring piece 31 and a static contact 32, the upper part of the static spring piece 31 fixes the static contact 32, and the lower part of the static spring piece 31 is set as a lead-out pin 311; the multiple static springs 3 are divided into a static spring group or more than one static spring group. In this embodiment, there are eight static springs 3, which are divided into two static spring groups, each static spring group contains four static springs 3, one of which is used as a normally open static spring to cooperate with the dynamic spring, and the other static spring group is used as a normally closed static spring to cooperate with the dynamic spring. The two static spring groups have the same structure and are installed in opposite directions when assembled on the base; the four static spring pieces 31 in each static spring group are along the width direction of the static spring piece 31 (for the static spring piece, The positive and negative directions of extension along the lead-out pin are the length directions of the static spring sheets, the directions extending on both sides of the length direction are the width directions of the static spring sheets, and the thickness direction of the static spring sheets is perpendicular to the length direction and the width direction of the static spring sheets) are arranged in a row, and the four static spring sheets 31 in the static spring group are insulated from each other and connected into an integral component 50 by a first injection molded part 5 formed by injection molding. The first injection molded part 5 covers the middle parts of the four static spring sheets 31 in the same static spring group; a mounting groove 41 is provided in the base 4, and the integral component 50 is installed in the mounting groove 41. Both side ends of the integral component 50 are respectively provided with convex buds 312. When the integral component 50 is installed in the mounting groove 41, the convex buds 312 at both side ends of the integral component 50 are interference fit with the mounting groove 41.

[0042] In this embodiment, in the overall component 50, the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends are respectively exposed outside the first injection molded part 5 (that is, the first injection molded part 5 does not completely cover the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends), and the convex buds 312 at the two side ends of the overall component 50 are respectively arranged at the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50. For the uniformity of manufacturing, the two sides of the width of the four static spring pieces 31 are respectively provided with convex buds 312.

[0043] In this embodiment, the convex bulges 312 in the middle of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50 are also provided with barbs to prevent withdrawal when the convex bulges 312 at the two side ends of the overall component 50 are interference fit with the mounting groove 41. Similarly, for the uniformity of manufacturing, the convex bulges 312 on both sides of the width of the four static spring pieces 31 are provided with barbs, and the convex bulges 312 and barbs in the middle of the two inner sides of the two static spring pieces 31 at the two side ends of the overall component 50, and the convex bulges 312 and barbs in the middle of the two sides of the two static spring pieces 31 in the middle of the overall component 50 are all covered in the first injection molded part 5.

[0044] In this embodiment, two through holes 313 penetrating the thickness are further provided in the middle of the static spring piece 31 , and the first injection molded part 5 is filled in the through holes 313 of the static spring piece 31 to increase the connection strength between the first injection molded part 5 and the static spring piece 31 .

[0045] In this embodiment, the installation groove 41 is a through groove adapted to the first injection molded part 5, and the two side ends of the installation groove 41 are respectively provided with limiting grooves 42 corresponding to the thickness of the static spring piece 31, and the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50 are respectively adapted in the limiting grooves 42; the convex bracts 312 in the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50 are interference fit with the limiting grooves 42.

[0046] In this embodiment, the upper portion of the static spring piece 31 is further provided with a protrusion 314 that protrudes further outward than the middle portion of the static spring piece in the width direction. In the base 4, guide grooves 43 are further provided above the two side ends corresponding to the mounting grooves 41. The protrusions 314 on the upper portions of the two outer sides of the two static spring pieces 31 at the two side ends in the overall assembly 50 are adapted to the guide grooves 43 of the base.

[0047] In this embodiment, the static spring piece 31 is provided with a first step 315 with the step surface facing downward at a position corresponding to the lower middle part; the bottom of the mounting groove 41 of the base 4 is also provided with a sinking groove 44, and the first step 315 of the static spring piece 31 fits in the sinking groove 44 of the base 4. The bottom surface of the sinking groove 44 is provided with a through hole 45 that allows the lower part of the static spring piece 31 (i.e., the lead-out pin) to pass through.

[0048] In this embodiment, the magnetic circuit part 1 includes components such as a coil 11, a yoke 12 and an iron core 13. The bottom of the yoke 12 is provided with two plug-in protrusions 121, and the base 4 is provided with a slot 46 for matching the plug-in protrusion 121 of the yoke 12. One side of the plug-in protrusion 121 of the yoke 12 is provided with a barb 122 for interference fit with the slot 46 of the base 4, and in the bottom of the slot 46, a through hole 461 for dispensing glue is provided on the other side corresponding to the plug-in protrusion 121 of the yoke 12.

[0049] In this embodiment, the movable spring armature component 2 cooperates with the magnetic circuit part 1, and the movable spring armature component 2 includes an armature 21, a restoring spring 22, a second injection molded part 23 and a movable spring 24; the restoring spring 22 is L-shaped, and the upper part of the armature 21 is provided with a matching portion 211 for matching with the blade of the yoke 12 of the magnetic circuit part; one side 221 of the L-shaped restoring spring 22 is riveted and fixed to the armature 21, and one side 212 of the armature 21 can be matched with the pole surface of the iron core 13 of the magnetic circuit part 1, and the other side 222 of the L-shaped restoring spring 22 is used to be fixed with the yoke 12 of the magnetic circuit part 1; the two sides of the armature 21 are respectively provided with There is a bent portion 213 bent in the direction away from one side of the armature, and the second injection molded part 23 is covered on the other side 214 of the armature 21 and its side surface to retain one side 212 of the armature so that it can maintain cooperation with the core pole surface, and the second injection molded part 23 is completely covered on the bent portion 213 so that the second injection molded part 23 can be firmly combined with the armature 21; in the second injection molded part 23, on the other side 214 corresponding to the armature 21, there are also a notch 231 for giving way to the restoring spring leaf and an un-injected part 232 for giving way to the matching part of the yoke; the second injection molded part 23 is also completely covered on the top of the movable spring 24.

[0050] In this embodiment, a first through hole 215 is further provided in the bending portion 213 of the armature 21, and the injection molded part 23 completely fills the first through hole 215 of the bending portion 213 of the armature 21; a second through hole 241 is provided at the top of the movable spring 24, and the injection molded part 23 completely fills the second through hole 241 of the movable spring.

[0051] In this embodiment, wings 216 protruding outward are respectively provided on both sides of the upper and middle part of the armature 21, and the inner edge of the wing 216 is provided with a slit 217 extending upward from the bottom end. The lower part of the wing 216 is bent upward by the slit 217 to form the bending part 213 of the armature.

[0052] In this embodiment, the bending portion 213 is bent at 90 degrees or close to 90 degrees relative to the wing 216 .

[0053] In this embodiment, the movable spring 24 is divided into two groups; each group of movable springs 24 includes a movable spring piece 242, an electrical bridge piece 243 and a movable contact 244; the second through hole 241 is arranged at the top of the movable spring piece 242, and the top of the movable spring piece 242 is directly below the bending portion 213 of the armature 21; the middle of the electrical bridge piece 243 is fixedly connected to the bottom of the movable spring piece 242, and two movable contacts 244 are respectively fixedly connected to the two ends of the electrical bridge piece 243, and each movable contact 244 is arranged on both sides of the electrical bridge piece 243, the one arranged on one side is a normally open movable contact, and the one arranged on the other side is a normally closed movable contact.

[0054] In this embodiment, the electrical bridge piece 243 is placed on one side of the movable spring piece 242 , and one side of the movable spring piece 242 is in the same direction as the other side 214 of the armature 21 .

[0055] A snap-on relay with multiple static springs of the present invention divides multiple static springs 3 into a static spring group or more than one static spring group; and the static spring pieces 31 in each static spring group are arranged in a row along the width direction of the static spring piece 31, and the static spring pieces 31 in the static spring group are insulated and connected to form an integral component 50 by a first injection molded part 5 formed by injection molding, and the first injection molded part 5 covers the middle part of the static spring piece 31; the base 4 is provided with a mounting groove 41, and the integral component 50 is installed in the mounting groove 41, and the two side ends of the integral component 50 are respectively provided with convex buds 312, and when the integral component 50 is installed in the mounting groove 41, the convex buds 312 at the two side ends of the integral component 50 are interference fit with the mounting groove 41. In the structure of the present invention, multiple static spring terminals 3 are installed in the base 4 by integrated insert injection molding, which greatly reduces the space between the static spring terminals while ensuring the bearing strength of the base on the static spring terminals, so that the volume of the product can be greatly reduced, which is conducive to the miniaturization of the relay product; the integrated insert injection molding of multiple static spring terminals makes the structure of the base simple, which can not only improve the injection molding yield of the base, but also simplify the assembly process and improve the assembly accuracy of the static spring terminals. At the same time, it can also avoid the difference in flatness between the static springs caused by the prior art in which each static spring is inserted into the base separately.

[0056] The present invention is a snap-on relay with multiple static springs, in which the convex buds 312 at both ends of the integral component 50 are respectively arranged at the middle of both outer sides of the two static spring pieces 31 at both ends of the integral component, and barbs are also arranged at the convex buds 312 at the middle of both outer sides of the two static spring pieces 31 at both ends of the integral component 50. In this structure of the present invention, the static spring injection-molded integrated structure is fixed by the barbs of the static spring terminals at both ends and the base through interference fit, and the plastic scraps generated by the interference fit can be just received on the base, thereby preventing the plastic scraps from entering the relay and affecting the relay performance.

[0057] A snap-on relay with multiple static springs of the present invention adopts a method in which limiting grooves 42 corresponding to the thickness of the static spring pieces are respectively provided at the two side ends of the installation groove 41, and guide grooves 43 are also provided above the two side ends of the installation groove in the base, and the middle parts of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50 are respectively adapted in the limiting grooves 42, and the protrusions 314 at the upper parts of the two outer sides of the two static spring pieces 31 at the two side ends of the overall component 50 are adapted in the guide grooves 43 of the base 4. This structure of the present invention realizes the limitation of the overall component in the front, back, left and right of the relay through the cooperation of the limiting grooves 42, the guide grooves 43 and the two static spring pieces 31 at the two side ends of the overall component, avoids tilting during the installation of the static spring injection molding body, and improves assembly consistency.

[0058] A snap-on relay with multiple static springs of the present invention adopts a barb 122 for interference fit with the slot of the base provided on one side of the plug-in protrusion 121 of the yoke 12, and a through hole 461 for glue dispensing is provided in the bottom of the slot 46 on the other side corresponding to the plug-in protrusion of the yoke 12. This structure of the present invention utilizes the through hole 461 that is connected to the outside world provided in the slot 46 to achieve glue dispensing, and the position of the barb is staggered with the position of the through hole, so that the plastic scraps generated by the barb and the base can be stored in the groove of the slot, and then the plastic scraps are fixed between the yoke fixing part and the base by glue dispensing, which prevents the plastic scraps from entering the inside of the relay and affecting the relay performance.

[0059] A snap-on relay with multiple static springs of the present invention adopts a bending portion 213 bent in a direction away from one side of the armature 21, respectively provided on both sides of the armature 21, the second injection molded part 23 is coated on the other side 214 of the armature 21 and its side surface to retain one side 212 of the armature so that it can maintain cooperation with the core pole surface, the second injection molded part 23 is completely coated on the bending portion 213 so that the second injection molded part 23 can be firmly combined with the armature 21; in the second injection molded part 23, on the other side corresponding to the armature 21, there are also a notch 231 for giving way to the restoring spring leaf and an un-injected part 232 for giving way to the matching part of the yoke; the second injection molded part 23 is also completely coated on the top of the moving spring 24. This structure of the present invention, by providing bending portions 213 on both sides of the armature 21, allows the second injection molded part 23 and the armature 21 to be effectively combined together, and the armature 21 and the movable spring 24 are injection molded into one piece using the second injection molded part 23, which not only achieves pressure-resistant isolation between the armature 21 and the movable spring 23, but also has the characteristics of small component size, simple production and assembly, easy to realize automated production, little influence of assembly cumulative tolerance between multiple groups of movable springs, and good parameter consistency of mass production of finished relays.

[0060] The snap-on relay with multiple static springs of the present invention adopts a method in which a first through hole 215 is provided in the bent portion 213 of the armature 21, so that the second injection molded part 23 is completely filled in the first through hole 215 of the bent portion 213 of the armature; and a second through hole 241 is provided on the top of the moving spring 24, so that the second injection molded part 23 is completely filled in the second through hole 241 of the moving spring. This structure of the present invention can increase the fixing strength of the second plastic part 23, the armature 21 and the moving spring 24 by using the first through hole 215 and the second through hole 241.

[0061] A snap-on relay with multiple static springs of the present invention adopts a structure in which wings 216 protruding outward are respectively provided on both sides of the middle and upper part of the armature 21, and the inner edge of the wings 216 is provided with a slit 217 extending upward from the bottom end. The lower part of the wings 216 is bent upward by the slit 217 to form the bending part 213 of the armature, and the top of the moving spring piece 242 is located directly below the bending part 213 of the armature 21. This structure of the present invention allows the bending part 213 of the armature 21 to be arranged roughly horizontally, so that the moving spring 24 can adjust the distance from the armature 21 at will, and obtain sufficient insulation and creepage distance, and also make the injection mold feasible in manufacturing. In addition, the plastic filled in the slit 217 can also increase the fixing strength of the second plastic part 23 and the armature 21.

[0062] The snap-on relay with multiple static springs of the present invention adopts a method of placing an electric bridge piece 243 on one side of the moving spring piece 242, and one side of the moving spring piece 242 is in the same direction as the other side 214 of the armature 21. This structure of the present invention allows the electric bridge piece 243 to be arranged on the side of the moving spring piece facing the normally closed end, so that the swing arm of the moving spring piece can be adjusted, thereby increasing the contact pressure of the normally closed end and preventing shaking.

[0063] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art 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 without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A snap-on relay with multiple static springs, comprising multiple static springs and a base; the static springs comprise static spring pieces and static contacts, the upper portion of the static spring pieces fixes the static contacts, and the lower portion of the static spring pieces is configured as lead pins; characterized in that: The multiple static springs are divided into a static spring group or more than one static spring group; the static spring pieces in each static spring group are arranged in a row along the width direction of the static spring pieces, and the static spring pieces in the static spring group are insulated and connected to form an integral component through a first injection molded part formed by injection molding, and the first injection molded part covers the middle part of the static spring piece; a mounting groove is provided in the base, and the integral component is installed in the mounting groove, and convex buds are respectively provided on both side ends of the integral component. When the integral component is installed in the mounting groove, the convex buds on both side ends of the integral component are interference fit with the mounting groove.

2. The snap-on relay with multiple static springs according to claim 1, characterized in that: In the overall component, the middle parts of the two outer sides of the two static spring sheets at the two side ends are respectively exposed outside the first injection molded part, and the convex buds at the two side ends of the overall component are respectively arranged in the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component.

3. The snap-on relay with multiple static springs according to claim 2, characterized in that: Barbs are also provided at the convex bulges in the middle of the two outer sides of the two static spring sheets at the two side ends of the integral component to prevent withdrawal when the convex bulges at the two side ends of the integral component are interference fit with the installation groove.

4. The snap-on relay with multiple static springs according to claim 1, characterized in that: The middle of the static spring sheet is also provided with at least one through hole penetrating the thickness, and the first injection molded part is filled in the through hole of the static spring sheet to increase the connection strength between the first injection molded part and the static spring sheet.

5. The snap-on relay with multiple static springs according to claim 2 or 3, characterized in that: The installation groove is a through groove adapted to the first injection molded part, and the two side ends of the installation groove are respectively provided with limit grooves corresponding to the thickness of the static spring sheet, and the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component are respectively adapted in the limit grooves; the convex parts in the middle parts of the two outer sides of the two static spring sheets at the two side ends of the overall component are interference fit with the limit grooves.

6. The snap-on relay with multiple static springs according to claim 5, characterized in that: The upper part of the static spring sheet is also provided with a protrusion in the width direction that protrudes further outward than the middle part of the static spring sheet. In the base, guide grooves are also provided above the two side ends corresponding to the installation grooves. The protrusions on the upper parts of the two outer sides of the two static spring sheets at the two side ends in the overall assembly are adapted in the guide grooves of the base.

7. The snap-on relay with multiple static springs according to claim 6, characterized in that: In the static spring sheet, a first step with the step surface facing downward is provided at a position corresponding to the lower middle part; the bottom of the mounting groove of the base is also provided with a sink groove, and the first step of the static spring sheet is matched in the sink groove of the base, and the bottom surface of the sink groove is provided with a through hole that allows the lower part of the static spring sheet to pass through.

8. The snap-on relay with multiple static springs according to claim 1, characterized in that: The snap-on relay also includes a magnetic circuit part, which includes a yoke, a plug-in protrusion is provided at the bottom of the yoke, and the base is provided with a slot for matching the plug-in protrusion of the yoke, one side of the plug-in protrusion of the yoke is provided with a barb for interference fit with the slot of the base, and a through hole for dispensing glue is provided in the bottom of the slot on the other side corresponding to the plug-in protrusion of the yoke.

9. The snap-on relay with multiple static springs according to claim 8, characterized in that: The snap-on relay also includes a spring-armature component that matches the magnetic circuit part, and the spring-armature component includes an armature, a restoring spring, a second injection molded part and a spring; the restoring spring is L-shaped, and the upper part of the armature is provided with a matching portion for matching with the blade of the yoke of the magnetic circuit part of the relay; one side of the L-shaped restoring spring is riveted and fixed on the armature, and one side of the armature can match with the core pole surface of the magnetic circuit part of the relay; the two sides of the armature are respectively provided with a pair of fingers that face away from the armature. The second injection-molded part covers the other side and the side surface of the armature to retain one side of the armature so that it can keep matching with the pole surface of the iron core, and the second injection-molded part completely covers the bent portion so that the second injection-molded part can be firmly combined with the armature; in the second injection-molded part, on the other side corresponding to the armature, there is also a notch to give way to the restoring spring leaf and an un-injected portion to give way to the matching portion of the yoke; the second injection-molded part also completely covers the top of the movable spring.

10. The snap-on relay with multiple static springs according to claim 9, characterized in that: A first through hole is also provided in the bending portion of the armature, and the second injection-molded part completely fills the first through hole of the bending portion of the armature; a second through hole is provided on the top of the movable spring, and the second injection-molded part completely fills the second through hole of the movable spring; wings protruding outward are respectively provided on both sides of the upper and middle part of the armature, and a slit extending upward from the bottom end is provided on the inner edge of the wing, and the lower part of the wing is bent upward by using the slit to form the bending portion of the armature; the bending portion forms a 90-degree or nearly 90-degree bend relative to the wing.

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