Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, which comprises a base and a coil part, the coil part comprises a coil rack, an iron core arranged on the coil rack and a coil wound on the coil rack, the iron core is provided with two contact parts, and the two contact parts are respectively exposed out of two ends of the coil rack. Each contact part is provided with two pole shoe surfaces which are arranged back to back in a preset direction, and the preset direction is perpendicular to the axial direction of the coil rack; the two contact parts are respectively provided with a positioning convex part, the base is respectively provided with a positioning groove corresponding to each positioning convex part, and each positioning convex part is respectively inserted and fixed in the corresponding positioning groove. According to the utility model, the positioning precision of the coil part is greatly improved, so that the consistency of mechanical parameters of a product after multiple beating actions is greatly improved. Particularly, the positioning convex part is made of a metal material, so that the high-temperature parameter change and the impact resistance of the product can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay. Background Art

[0002] When the relay is in action and released, especially the relay with magnet, the force of the magnetic circuit is large due to the superimposed force of the magnet, and the coil part of the relay needs to withstand tens of millions of taps, so high requirements are placed on the stability of the coil part of the relay. If the assembly positioning accuracy of the coil part is poor and the stability is insufficient, on the one hand, it will lead to insufficient product consistency, a decrease in the assembly qualification rate, and an increase in production costs; on the other hand, the relay parameters will change significantly during the use of the product, which will lead to a decrease in the reliability of the relay and affect the customer experience.

[0003] In an electromagnetic relay of the prior art, in order to facilitate the installation of the coil part from top to bottom, the shaft part on the base for installing the armature part is separated to form a shaft bracket. After the coil part is loaded into the accommodating cavity provided in the base from top to bottom, the shaft bracket is connected to the base, and then the armature part is installed. This relay has the following deficiencies: the coil part is fixed by a plastic protrusion provided on the coil frame and the base is clamped together, and no metal structure is reserved specifically for assembly and fixation. The precision and strength of plastic parts are inferior to those of metal parts, and the ability to resist high-temperature deformation is poor. There are problems such as insufficient positioning accuracy and poor high-temperature parameter stability. In addition, the shaft bracket of this relay is connected to the base by a single-sided snap connection, which is prone to uneven force on the shaft bracket, causing the shaft to tilt easily, affecting the rotation stability and accuracy of the armature part. Utility Model Content

[0004] The utility model mainly aims at the positioning problem of the coil part in the prior art and provides an electromagnetic relay which greatly improves the positioning accuracy of the coil part through structural improvement.

[0005] The utility model solves the technical problem by adopting the following technical solution: an electromagnetic relay, comprising a base and a coil part, the coil part comprising a coil frame, an iron core arranged on the coil frame and a coil wound on the coil frame, the iron core having two contact parts, the two contact parts respectively exposed outside the two ends of the coil frame in the axial direction, and each contact part respectively having two pole shoe surfaces arranged back to back in a preset direction, the preset direction being perpendicular to the axial direction of the coil frame; the two contact parts are respectively provided with positioning protrusions, the base is respectively provided with positioning grooves corresponding to each positioning protrusion, and each positioning protrusion is respectively inserted and fixed in the corresponding positioning groove.

[0006] Further, each positioning protrusion is respectively interference fit with the corresponding positioning groove and / or fixed by glue. Further, the positioning protrusion is located on the side of the contact part in the axial direction of the coil frame and facing away from the coil, and the positioning protrusion protrudes from the bottom surface of the contact part; each positioning protrusion is respectively interference fit with the corresponding positioning groove in the preset direction and / or the axial direction of the coil frame.

[0007] Furthermore, the positioning protrusions are respectively interference fit with the corresponding positioning grooves on both sides of the preset direction, the positioning protrusions of the two contact parts are respectively interference fit with the corresponding positioning grooves on the side relatively outward in the axial direction of the coil frame, or the positioning protrusions of the two contact parts are respectively interference fit with the corresponding positioning grooves on the side relatively inward in the axial direction of the coil frame.

[0008] Furthermore, the bottom of the positioning groove is provided with a first glue dot hole which passes through the bottom surface of the base, and the first glue dot hole is connected with the first glue creeping gap and / or the lateral glue creeping gap, wherein the first glue creeping gap is formed between the bottom of the positioning groove and the bottom surface of the positioning protrusion, and the lateral glue creeping gap is formed between at least one groove wall of the positioning groove and the side surface corresponding to the positioning protrusion.

[0009] Furthermore, the lateral creeping gap includes at least one of a second creeping gap, a third creeping gap, a fourth creeping gap, and a fifth creeping gap, wherein the second creeping gap and the third creeping gap are respectively formed by gaps between two side surfaces of the positioning protrusion in the axial direction of the coil frame and the groove walls corresponding to the positioning groove, and the fourth creeping gap and the fifth creeping gap are respectively formed by gaps between two side surfaces of the positioning protrusion in the preset direction and the groove walls corresponding to the positioning groove.

[0010] Furthermore, the bottom of the positioning groove is provided with two first glue dispensing holes arranged along the preset direction, and the bottom of the positioning groove is provided with a supporting protrusion contacting and cooperating with the bottom surface of the positioning protrusion, and the supporting protrusion forms two first glue creeping gaps arranged along the preset direction between the positioning groove and the positioning protrusion, and the two first glue creeping gaps are respectively connected with the two first glue dispensing holes in a one-to-one correspondence; the positioning protrusions of the two contact parts are respectively provided with first clamping protrusions on the relatively outward sides in the axial direction of the coil frame, which are abutted against the corresponding groove walls of the corresponding positioning grooves, and the first clamping protrusion forms two second glue creeping gaps arranged along the preset direction between the positioning protrusion and the positioning groove, and the two second glue creeping gaps are respectively connected with the two first glue creeping gaps in a one-to-one correspondence; the two groove walls of the positioning groove in the preset direction are respectively provided with grooves, so that the fourth glue creeping gap and the fifth glue creeping gap are formed between the two groove walls of the positioning groove in the preset direction and the corresponding positioning protrusions.

[0011] Furthermore, it also includes a shell, which is connected to the base and contains the coil part in its shell cavity; the inner top surface of the shell is provided with a second clamping protrusion corresponding to each contact part, and each second clamping protrusion is respectively pressed against the top surface of the corresponding contact part; the preset direction and the axial direction of the coil frame are respectively horizontal directions.

[0012] Furthermore, the base is provided with a receiving cavity corresponding to the coil part, the coil part is loaded into the receiving cavity, and the positioning groove is located in the receiving cavity.

[0013] Furthermore, it also includes a rotating shaft bracket and an armature part. The rotating shaft bracket includes a support frame and a rotating shaft arranged on the support frame and extending upward. The support frame is connected to the base and spans the coil part along the preset direction. The rotating shaft passes through the shaft hole set in the armature part, so that the armature part can rotate around the rotating shaft and cooperate with the coil part.

[0014] Furthermore, the support frame is provided with plug-in parts at the bottom of both ends in the preset direction, and the base is provided with slots corresponding to each plug-in part, and each plug-in part is respectively inserted and fixed in a corresponding slot.

[0015] Furthermore, the plug-in portion is fixedly fitted with the slot by at least one of hot riveting, interference fit, and glue dispensing.

[0016] Furthermore, at least one second glue dispensing hole is provided at the bottom of the slot, and the second glue dispensing hole passes through the bottom surface of the base, and a sixth glue creeping gap connecting the second glue dispensing hole is provided between the plug-in portion and the slot.

[0017] Furthermore, at least one hot-riveted protrusion is provided at the tail end of the plug-in part, and the hot-riveted protrusion is penetrated by a hole provided at the bottom of the slot and is hot-riveted, and the hole passes through the bottom surface of the base; the hole and the second glue dispensing hole provided at the bottom of the slot are independent of each other, or the hole is the second glue dispensing hole, and glue is dispensed after the hot-riveted protrusion is hot-riveted, and a glue dispensing clearance sink is provided on the hot-riveted protrusion.

[0018] Furthermore, the plug-in part and the slot are equipped with a positioning structure, which includes a positioning rib, which is provided on one of the side surface of the plug-in part and the slot wall, and extends along the depth direction of the slot, and the positioning rib is abutted against the other side surface of the plug-in part and the slot wall.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. Since the two contact parts of the core are provided with positioning convex parts respectively, the base is provided with positioning grooves corresponding to the positioning convex parts respectively, and the positioning convex parts are respectively inserted and fixed in the corresponding positioning grooves, the utility model greatly improves the positioning accuracy of the coil part, thereby greatly improving the consistency of the mechanical parameters of the product after multiple clapping actions. In particular, the positioning convex parts are made of metal, which helps to reduce the high temperature parameter changes and impact resistance of the product.

[0021] 2. Each positioning protrusion is respectively interference fit and / or fixed by glue with the corresponding positioning groove, so that the fixing method of the positioning protrusion and the positioning groove is simple and easy to operate. In particular, when the positioning protrusion and the positioning groove are both interference fit and glue fixed, the coil part and the base can be initially fixed by the interference fit method, which can not only improve the convenience of the glue operation, but also further improve the positioning accuracy of the coil part and the base.

[0022] 3. The positioning protrusion is located at the bottom of the side of the contact part in the axial direction of the coil frame and facing away from the coil, and the positioning protrusion protrudes from the bottom surface of the contact part, so that the positioning protrusion avoids the burr area of ​​the iron piece, which can reduce the generation of plastic chips during assembly. The positioning protrusions are respectively interference-fitted with the corresponding positioning grooves on both sides of the preset direction, which can ensure that the coil part is accurately positioned in the preset direction, so that the position of the coil part and the armature part is more stable and firm when they are matched. In addition, the positioning protrusions of the two contact parts are respectively interference-fitted with the corresponding positioning grooves on the side relatively outward in the axial direction of the coil frame, or the positioning protrusions of the two contact parts are respectively interference-fitted with the corresponding positioning grooves on the side relatively inward in the axial direction of the coil frame, so that each positioning protrusion only needs to be clamped on one side with the positioning groove in the axial direction of the coil frame, thereby avoiding excessive positioning of the positioning protrusion in the axial direction of the coil frame and making it inconvenient to assemble, and can provide lateral glue creeping space when further using glue fixation.

[0023] 4. A first glue dispensing hole is provided at the bottom of the positioning groove, and a first glue creeping gap is formed between the bottom of the positioning groove and the bottom surface of the positioning convex part, so that the glue dispensing operation is more convenient and sufficient glue creeping gap is ensured between the positioning convex part and the positioning groove. In particular, the setting of the lateral glue creeping gap allows the glue to fully flow into and wrap the positioning convex part, achieving a relatively firm gluing fixation and sealing.

[0024] 5. Since the support frame is fixed by inserting and inserting the slot arranged on the base through the plug-in part, the utility model can ensure that the shaft bracket is firmly connected to the base, and the shaft will not be tilted due to uneven force, and the shaft bracket will not be loosened during the product production turnover process, thereby ensuring that the shaft position remains unchanged and the shaft will not be tilted, so that the armature part can achieve stable and precise rotation.

[0025] 5. A second glue dispensing hole is provided at the bottom of the slot, and a sixth glue creeping gap connected to the glue dispensing hole is provided between the bottom end of the plug-in part and the bottom of the slot, so that the glue dispensing operation is more convenient and ensures that there is sufficient glue creeping gap between the plug-in part and the slot.

[0026] 6. At least one hot-riveted protrusion is provided at the rear end of the plug-in part, and the hot-riveted protrusion is penetrated through the second glue dispensing hole provided at the bottom of the slot, and the hot-riveted treatment is performed before the plug-in part and the slot are glued and fixed, so that the support frame and the base can be pre-fixed, which can not only further improve the convenience of the glue dispensing operation, but also further improve the positioning accuracy of the support frame and the base.

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded schematic diagram of the utility model of the first embodiment;

[0029] Figure 2 Schematic diagram of the three-dimensional structure of the coil part of the utility model in the first embodiment Figure 1 ;

[0030] Figure 3 Schematic diagram of the three-dimensional structure of the coil part of the utility model in the first embodiment Figure 2 ;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the base of the utility model in the first embodiment;

[0032] Figure 5-1 Embodiment 1 Figure 4 A magnified schematic diagram of part G in the middle;

[0033] Figure 5-2 Embodiment 1 Figure 4 A magnified schematic diagram of part A;

[0034] Figure 6 It is a bottom view of the base of the utility model in the first embodiment;

[0035] Figure 7 The three-dimensional structure diagram of the rotating shaft bracket of the utility model in the first embodiment Figure 1 ;

[0036] Figure 8 The three-dimensional structure diagram of the rotating shaft bracket of the utility model in the first embodiment Figure 2 ;

[0037] Fig. 9 This is a three-dimensional structure diagram of the base, coil part, and rotating shaft support of the utility model in the first embodiment in the assembled state. Figure 1 ;

[0038] Fig.10 This is a three-dimensional structure diagram of the base, coil part, and rotating shaft support of the utility model in the first embodiment in the assembled state. Figure 2 ;

[0039] Fig.11 Embodiment 1 Fig. 9 Bottom view of

[0040] Fig.12 Embodiment 1 Fig.11 GG cross-sectional view;

[0041] Fig.13 Embodiment 1 Fig.12 A magnified schematic diagram of part B;

[0042] Fig.14 Embodiment 1 Fig. 9 A top view of

[0043] Fig.15 Embodiment 1 Fig.14 FF cross-sectional view;

[0044] Fig.16 Embodiment 1 Fig.15 A magnified schematic diagram of part C;

[0045] Fig.17 Embodiment 1 Fig.14 AA section view;

[0046] Fig.18 Embodiment 1 Fig.14 BB cross-sectional view;

[0047] Fig.19 Embodiment 1 Fig.14 CC section view;

[0048] Fig. 20 Embodiment 1 Fig. 9 The main view;

[0049] Fig.21 Embodiment 1 Fig. 20 DD cross-sectional view;

[0050] Fig. 22 It is a three-dimensional structural schematic diagram of the armature part of the utility model in the first embodiment;

[0051] Fig.23 It is a top view of the utility model of embodiment 1;

[0052] Fig.24 Embodiment 1 Fig.23 EE cross-sectional view;

[0053] Fig.25 Embodiment 1 Fig.24 The enlarged schematic diagram of the D part;

[0054] Fig.26 Embodiment 1 Fig.24 The enlarged schematic diagram of part E in the middle;

[0055] Fig. 27 Embodiment 1 Fig.24 The enlarged schematic diagram of the middle F part;

[0056] Fig.28 It is a three-dimensional structural schematic diagram of the base of the utility model in the second embodiment;

[0057] Fig.29 Embodiment 2 Fig.28 A magnified schematic diagram of the middle H section;

[0058] Fig.30 This is a cross-sectional view of the utility model of embodiment 2 Figure 1 ;

[0059] Fig.31 Embodiment 2 Fig.30 An enlarged schematic diagram of part I;

[0060] Fig.32 This is a cross-sectional view of the utility model of embodiment 2 Figure 2 ;

[0061] Fig.33 Embodiment 2 Fig.32 The enlarged schematic diagram of the middle J part;

[0062] Fig.34 It is a three-dimensional structural schematic diagram of the housing of the utility model in the third embodiment;

[0063] Fig.35 It is a cross-sectional view of the utility model of embodiment 3;

[0064] In the figure, 1, base, 11, support table, 111, slot, 1111, positioning rib, 1112, bottom gap, 1113, side gap, 12, second glue dispensing hole, 13, accommodating cavity, 14, positioning groove, 141, first clamping protrusion, 142, supporting protrusion, 143, first groove wall, 144, second groove wall, 145, groove, 15, first glue dispensing hole, 151, first creeping glue gap, 152, second creeping glue gap, 153, third creeping glue gap, 154, fourth creeping glue gap, 155, fifth creeping glue gap, 16, jack, 2, coil part, 21, coil frame, 211, protection Table, 22, iron core, 221, contact portion, 222, positioning convex portion, 2221, first side, 2222, second side, 23, coil, 24, coil lead pin, 3, shaft bracket, 31, shaft, 32, support frame, 321, top plate, 322, side plate, 323, second convex portion, 33, plug-in portion, 331, hot riveting convex portion, 332, glue-dispensing and giving way to sinking platform, 34, boss, 4, armature part, 41, shaft hole, 411, sinking groove, 42, snapping part, 43, plastic part, 431, first convex portion, 44, iron core, 5, shell, 51, limiting convex portion, 52, second clamping convex portion. DETAILED DESCRIPTION

[0065] In the present invention, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance.

[0066] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more, and "at least one" means one or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] See also Figure 1-Figure 27 As shown, an electromagnetic relay of the utility model comprises a base 1, a rotating shaft support 3, an armature part 4, a coil part 2 and a housing 5. The coil part 2 comprises a coil frame 21 and an iron core 22. The coil frame 21 and the iron core 22 are fixed together by insert injection molding, and a coil 23 is wound on the coil frame 21. The iron core 22 is roughly U-shaped, and comprises a core rod located in the coil frame 21 and two contact parts 221 exposed outside the two ends of the coil frame 21 in the axial direction. Each contact part 221 has two pole shoe surfaces arranged back to back in a preset direction, and the preset direction is perpendicular to the axial direction of the coil frame 21. The base 1 is provided with a receiving cavity 13 for the coil part 2 to be loaded from top to bottom. The coil part 2 is horizontal and loaded into the receiving cavity 13. The coil frame 1 and the receiving cavity 13 have the same or substantially the same size in the preset direction, so that the receiving cavity 13 can provide initial positioning for the coil part 2. In addition, a guide structure is provided on the wall of the accommodating cavity 13 to facilitate the rapid insertion of the coil part 2 into the accommodating cavity 13. The two contact parts 221 of the iron core are respectively provided with positioning protrusions 222, and the accommodating cavity 13 is respectively provided with positioning grooves 14 corresponding to each positioning protrusion 222, and each positioning protrusion 222 is respectively inserted and fixed in the corresponding positioning groove 14. Specifically, each positioning protrusion 222 is respectively fixed to the corresponding positioning groove 14 by interference fit and / or glue dispensing, so that the fixing structure of the positioning protrusion 222 and the positioning groove 14 is relatively simple and convenient to assemble.

[0068] The rotating shaft bracket 3 includes a support frame 32 and a rotating shaft 31 arranged on the support frame 32 and extending upward. The support frame 32 is connected to the base 1 and crosses the coil part 2 along the preset direction. The rotating shaft 31 is passed through the shaft hole 41 set in the armature part 4, and the two are in a clearance fit, so that the armature part 3 can rotate around the rotating shaft 31 and cooperate with the coil part 2. The shell 5 is connected to the base 1 and contains the coil part 2, the rotating shaft bracket 3 and the armature part 4 in its shell cavity. The preset direction and the axial direction of the coil frame 21 are both horizontal directions. Specifically, the preset direction is the front-to-back direction, and the axial direction of the coil frame 21 is the left-to-right direction, but it is not limited to this.

[0069] like Figure 2 , Figure 3 As shown, the positioning protrusion 222 is located at the bottom of the side of the contact part 221 in the axial direction of the coil frame 21 and facing away from the coil 23, and the positioning protrusion 222 protrudes from the bottom surface of the contact part 221. Each positioning protrusion 222 is respectively interference-fitted with the corresponding positioning groove 14 and fixed by glue, and the positioning protrusion 222 and the positioning groove 14 are interference-fitted in the axial direction of the coil frame 21 and / or in the preset direction. Specifically, the positioning protrusion 222 is respectively interference-fitted with the corresponding positioning groove 14 on both sides of the preset direction to ensure that the coil part 2 is accurately positioned in the preset direction, so that the position of the coil part 2 is more stable and firm when it cooperates with the armature part 4. In addition, the positioning protrusions 222 of the two contact parts 221 are respectively interference-fitted with the corresponding positioning groove on the side relatively outward in the axial direction of the coil frame 21, but it is not limited to this. In other embodiments, the positioning protrusions of the two contact parts are respectively interference-fitted with the corresponding positioning groove on the side relatively inward in the axial direction of the coil frame. In this way, it is possible to avoid over-positioning of the positioning protrusion in the axial direction of the coil frame, which makes assembly inconvenient, and to provide lateral glue creeping space when further glue spot fixing is adopted.

[0070] The two side surfaces of the positioning protrusion 222 in the axial direction of the coil frame are defined as a first side surface 2221 and a second side surface 2222, respectively. The first side surface 2221 is located on the side of the second side surface 2222 away from the coil frame 21. The positioning groove 14 has two opposite groove walls in the axial direction of the coil frame, which are defined as a first groove wall 143 and a second groove wall 144, respectively. The first groove wall 143 is opposite to the first side surface 2221, and the second groove wall 144 is opposite to the second side surface 2222. The first side surface 2221 of the positioning protrusion 222 is pressed against the first groove wall 143 of the positioning groove 14 or the first clamping protrusion 141 provided on the first groove wall 143.

[0071] In this embodiment, the positioning groove 14 is provided with a first glue dispensing hole 15, and the first glue dispensing hole 15 is specifically located at the bottom of the positioning groove 14 and penetrates the bottom surface of the base 1. Fig.10 The first glue dispensing hole 15 is connected to the glue creeping gap formed between the positioning groove 14 and the positioning protrusion 222, and the glue creeping gap includes a first glue creeping gap and / or a lateral glue creeping gap, wherein a first glue creeping gap 151 is formed between the bottom of the positioning groove 14 and the bottom of the positioning protrusion 222, as shown in FIG. Fig.12 , Fig.13 The second groove wall 144 can restrict the glue entering from the first glue dispensing hole 15 from flowing out of the positioning groove 14 .

[0072] Furthermore, a lateral creeping glue gap connected to the second creeping glue gap 151 is provided between the side of the positioning protrusion 222 and the groove wall of the positioning groove 14, so that the glue can fully flow into and wrap the positioning protrusion 222, so as to achieve a relatively firm gluing fixation and sealing. The lateral creeping glue gap includes at least one of the second creeping glue gap 152, the third creeping glue gap 153, the fourth creeping glue gap, and the fifth creeping glue gap, wherein the second creeping glue gap 152 and the third creeping glue gap 153 are respectively formed by the gaps between the two side surfaces (i.e., the first side surface 2221 and the second side surface 2222) of the positioning protrusion 222 in the axial direction of the coil frame 21 and the groove walls (i.e., the first groove wall 143 / the second groove wall 144) corresponding to the positioning groove, and the fourth creeping glue gap and the fifth creeping glue gap are respectively formed by the gaps between the two side surfaces of the positioning protrusion in the preset direction and the groove walls corresponding to the positioning groove. Specifically, in the present embodiment, the lateral creeping glue gap includes the second creeping glue gap 152 and the third creeping glue gap 153, but is not limited thereto.

[0073] In this embodiment, if Figure 6 As shown, the bottom of the positioning groove 14 is provided with two first glue dispensing holes 15 arranged along the preset direction. Figure 5-1 As shown, the bottom of the positioning groove 14 is provided with a supporting protrusion 142 that contacts and cooperates with the bottom surface of the positioning protrusion 222. The supporting protrusion 142 forms two first glue creeping gaps 151 between the positioning groove 14 and the positioning protrusion 222. The two first glue creeping gaps 151 are respectively located on both sides of the supporting protrusion 142 in the preset direction, and the two first glue creeping gaps 151 are respectively connected with the two first glue dispensing holes in a one-to-one correspondence. The first clamping protrusion 141 provided on the first groove wall 143 forms two second glue creeping gaps 152 arranged along the preset direction between the first groove wall 143 and the first side surface 2221 of the positioning protrusion 222, and the two first glue creeping gaps 151 are connected with the two second glue creeping gaps 152 in a one-to-one correspondence. As shown Fig.13 , Fig.16The supporting protrusion 142 and the first clamping protrusion 141 are respectively in the shape of bosses, but are not limited thereto, and in other embodiments, they may also be in the shape of convex ribs.

[0074] like Figure 3 As shown, the coil part 2 is provided with two coil lead pins 24, and the two coil lead pins 24 are respectively located at the two ends of the coil frame 21 and are located on one side of the iron core 22 in the preset direction. The coil frame 21 is provided with a protective platform 211 at each coil lead pin 24, and the protective platform 211 fully or partially wraps the coil lead pin 24 around to prevent the coil lead pin 24 from being skewed when inserted. The base 1 is provided with a socket 16 corresponding to each coil lead pin, and the coil lead pin 24 is connected to the protective platform 211 and is inserted into the socket 16 and fixed with glue, as shown in FIG. Fig.10 Therefore, the fixing of the coil lead pin 24 can also improve the positioning accuracy of the coil part 2.

[0075] As a preferred structure, the support frame 32 is provided with plug-in parts 33 at the bottom of both ends in the preset direction, and the base 1 is provided with slots 111 corresponding to each plug-in part 33, and each plug-in part 33 is respectively inserted and fixed in the corresponding slot 111. Specifically, the plug-in part 33 is fixedly matched with the slot 111 by at least one of hot riveting, interference fit, and glue dispensing.

[0076] like Figure 7 , Figure 8 As shown, the shaft support 3 adopts a symmetrical structure, and its support frame 32 is roughly in the shape of a letter U, including a top plate 321 and two side plates 321, the two side plates 321 are respectively arranged at the two opposite ends of the bottom surface of the top plate 321 in the preset direction, and are parallel to each other, the shaft 31 is arranged in the middle of the top surface of the top plate 321, and the bottom ends of the two side plates 321 are respectively provided with plug-in parts 33. Figure 4 As shown, the base 1 is provided with two support platforms 11, and the two support platforms 11 correspond to the two side plates 321 one by one. The support platforms 11 are provided with slots 111, and the parts of the bottom ends of the two side plates 321 without the plug-in parts 33 are respectively placed on the top ends of the corresponding support platforms 11, as shown in FIG. Fig.19 shown.

[0077] The plug-in portion 33 and the slot 111 are matched with a positioning structure, which includes a positioning rib 1111, which is provided on one of the side of the plug-in portion 33 and the slot wall of the slot 111, and extends along the depth direction of the slot 111, and the positioning rib 1111 is abutted against the other of the side of the plug-in portion 33 and the slot wall of the slot 111. In this way, when the slot 111 is deformed, the positioning rib 1111 can be used to achieve accurate positioning of the key position through interference fit. Specifically, in this embodiment, the positioning rib 1111 is provided on the slot wall of the slot 111.

[0078] The plug-in portion 33 is plate-shaped, and the slot 111 is strip-shaped. The plug-in portion 33 is provided with guide surfaces at the bottom of both sides in the length direction to facilitate the plug-in portion 33 to be inserted into the slot 111. The slot 111 is provided with a plurality of positioning ribs 1111 on at least one groove wall in the width direction. Figure 4 , Figure 5-2 As shown, the plug-in portion 33 and the slot 111 are tightly matched in the width direction of the slot 111. The maximum length of the plug-in portion 33 is consistent or substantially consistent with the length of the slot 111, so the slot 111 is not provided with a positioning rib 1111 along its slot wall in the length direction, but it is not limited thereto. In other embodiments, according to actual needs, at least one slot wall of the slot 111 in the length direction may also be provided with a positioning rib 1111.

[0079] like Figure 6 As shown, the bottom of the slot 111 is provided with at least one second glue hole 12, and the second glue hole 12 passes through the bottom surface of the base 1, and a sixth glue creeping gap connected to the second glue hole 12 is provided between the plug-in portion 33 and the slot 111, and the sixth glue creeping gap includes a bottom gap 1112 formed between the bottom surface of the plug-in portion 33 and the bottom of the slot 111 and / or a side gap 1113 formed between the side surface of the plug-in portion 33 and the slot wall of the slot 111. Specifically, in this embodiment, the sixth glue creeping gap includes a bottom gap 1112 formed between the bottom surface of the plug-in portion 33 and the bottom of the slot 111, as shown in FIG. Fig.19 The sixth creeping glue gap also includes a side gap 1113 formed between the side of the plug-in portion 33 and the slot wall 11 of the slot (eg, the slot 111 is provided with the positioning rib 1111 of the slot wall) as shown. Fig.21 As shown, the side gap 1113 is connected to the bottom gap 1112, which helps to further improve the glue fixation effect between the plug-in portion 33 and the slot 11. In this embodiment, the number of the second glue holes 12 set at the bottom of each slot 111 is specifically two, but not limited to this, and the two second glue holes 12 are arranged along the length direction of the slot 111.

[0080] As a preferred structure, Figure 2 , Figure 3As shown, at least one hot-riveted protrusion 331 is respectively provided at the tail end of each plug-in portion 33, and the hot-riveted protrusion 331 is penetrated through the hole provided at the bottom of the slot 111 and fixed by hot-riveting, and the hole passes through the bottom surface of the base 1, and the hole is the second glue-dispensing hole 12 mentioned above, but it is not limited to this. In other embodiments, the hole and the second glue-dispensing hole 12 are different holes. The hot-riveted protrusion 331 is hot-riveted before the plug-in portion 33 and the slot 111 are fixed by glue, so that the support frame 32 and the base 1 can be pre-fixed to facilitate the subsequent glue-dispensing operation, so that the position of the shaft bracket 3 can be prevented from changing due to the influence of temperature or vibration during the turnover process or the glue drying and curing process. In addition, the rotating shaft bracket 3 is a force-bearing member. Due to the limited volume and structure, it is difficult to enlarge the hot-riveted protrusion 331. The strength of hot-riveting alone is limited. Therefore, further glue treatment can greatly improve the fixing strength of the plug-in part and the slot. However, for products with larger volumes, the hot-riveted protrusion can be enlarged, and the plug-in part and the slot can also be fixed only by hot-riveting. In this embodiment, the number of hot-riveted protrusions 331 set at the tail end of each plug-in part 33 is two, but not limited to this. The two hot-riveted protrusions 331 are arranged along the length direction of the plug-in part 33. The hot-riveted protrusion is provided with a glue-dispensing sink 332, which can prevent the hot-riveted protrusion 331 from covering the glue-dispensing hole 12 after hot-riveting, thereby facilitating the glue liquid to flow into the sixth glue creeping gap between the plug-in part 33 and the slot 111, thereby achieving precise and firm gluing and fixing.

[0081] like Fig. 22 As shown, the top surface of the armature part 4 is provided with one or more first protrusions 431, and the first protrusions 431 serve as sliding contact positions for the armature part 4 to cooperate with the inner top surface of the shell 5 during the rotation process. The armature part 4 specifically includes an armature and a plastic part 43, which are integrally insert-molded together, and the first protrusion 431 is specifically arranged on the plastic part 43, and the first protrusion 431 is a convex bud structure, and the surface of the convex bud structure is an arc spherical surface. In other embodiments, the first protrusion 431 is a rib structure. The provision of the first protrusion 431 can prevent the injection burrs on the sliding contact area of ​​the armature part 4 from jamming and interfering when the armature part 4 contacts the shell 5 during the rotation process, making the sliding friction smoother and reducing the risk of the injection burrs falling off due to friction to form free plastic chips.

[0082] like Figure 24-Figure 27 As shown, the inner top surface of the housing 5 is provided with a limiting protrusion 51 corresponding to the rotating shaft 31, and the limiting protrusion 51 and the tail end of the rotating shaft 31 are clearance-matched, but it is not limited thereto. In other embodiments, the limiting protrusion 51 abuts against the tail end of the rotating shaft 31. Fig. 22As shown, the top surface of the armature part 4 is provided with a circle of recessed grooves 411 leading to the shaft hole 41 around the shaft hole 41, and the limiting protrusion 51 enters the recessed groove 411. During the rotation of the armature part 4, the bottom surface of the recessed groove 411 cooperates with the bottom end of the limiting protrusion 51 to limit, which can make the rotation of the armature part 4 more reliable.

[0083] like Figure 7 As shown, the top surface of the support frame 32 (i.e., the top surface of the top plate 321) is provided with one or more second protrusions 423, and the second protrusions 423 are in contact with the armature part 4 during the rotation of the armature part 4. Specifically, in this embodiment, the number of the second protrusions 423 is two, and the two second ribs are respectively located at the two ends of the top plate 321 in the length direction, and the second protrusions 423 are rib structures and extend along the width direction of the top plate 321. In other embodiments thereof, the second protrusions 423 are convex bud structures, and the surface of the convex bud structure is an arc spherical surface. The top surface of the support frame 32 is provided with a circle of bosses 324 located on the periphery of the rotating shaft 31, and the bosses 324 are used to support the armature part 4, and the top surface of the bosses 324 is flush with the top of the second protrusions 423.

[0084] like Fig. 22 As shown, the armature part 4 is provided with two snap-fitting parts 42 arranged along its width direction at both ends in its length direction, the opposite inner sides of the two snap-fitting parts 42 are pole shoe surfaces, and the two snap-fitting parts 42 are one large and one small. Specifically, the armature part 4 has a centrally symmetrical structure.

[0085] The above-mentioned two support platforms 11 are respectively located on both sides of the accommodating cavity 13 in the width direction. After the coil part 2 is assembled, the rotating shaft bracket 3 can be installed, and then the armature part 4 can be installed, and the two contact parts 221 of the iron core 22 of the coil part can be respectively matched between the two pole shoe surfaces at both ends of the armature part 4.

[0086] The utility model also includes a contact portion 6 and a plurality of push cards 7. The contact portion 6 includes a plurality of contact units. Each group of contact units is respectively mounted on the base 1, and the contact portion 6 and the coil portion 2 are arranged along the width direction of the base 1. The movable spring portion of each contact unit cooperates with the corresponding snapping portion 42 of the armature portion 4 through the push card 7, so that the armature portion 4 pushes each push card 7 to move by rotating, so as to control the corresponding contact unit to be closed or opened.

[0087] The utility model discloses an electromagnetic relay, which greatly improves the positioning accuracy of the coil part 2, thereby greatly improving the consistency of the mechanical parameters of the product after multiple snapping actions. In particular, the positioning protrusion 222 is made of metal, which helps to reduce the high-temperature parameter changes and impact resistance of the product. In addition, the utility model utilizes the interference fit of the positioning protrusion 222 with the positioning groove 14 to enable the coil part 2 and the base 1 to be initially fixed, which can not only improve the convenience of subsequent glue dispensing operations, but also further improve the positioning accuracy of the coil part 2 and the base 1. In addition, the positioning protrusion 222 avoids the burr area of ​​the iron part, which can reduce the generation of plastic chips during assembly.

[0088] The rotating shaft bracket 3 of the utility model adopts a completely symmetrical structure to ensure that the forces on both sides are evenly distributed during assembly, so that the axis of the rotating shaft 31 is aligned with the two slots 111 of the base 1 after assembly. The rotating shaft bracket 3 is provided with a hot riveting protrusion 331, and the rotating shaft bracket 3 and the base 1 can be accurately positioned and matched through tooling. At the same time, four hot riveting protrusions 331 are used for four-point hot pressing and riveting to achieve pre-fixation in a precise positioning state, which provides convenience for the subsequent dispensing process. The utility model adopts a symmetrical design of the rotating shaft bracket 3 and the above-mentioned fixing structure to ensure that the movement of the pole shoe surfaces on both sides during the rotation of the armature part 4 around the rotating shaft 31 is symmetrical about the axis center. The shaft hole 41 of the armature part 4 and the rotating shaft 31 are designed to be matched with a small gap. On the one hand, it is convenient for the armature part 4 to rotate flexibly about the rotating shaft 31 to avoid getting stuck under temperature shock; on the other hand, the small gap fit can appropriately compensate for assembly errors, with a certain tolerance margin, to improve the consistency of the contact of the pole shoe surfaces on both sides during the rotation of the armature part 4.

[0089] Embodiment 2

[0090] See also Figure 28-Figure 33As shown, an electromagnetic relay of the utility model is different from the above-mentioned embodiment 1 in that: the lateral creeping glue gap includes not only the second creeping glue gap 152 formed between the first groove wall 143 and the first side surface 2221 of the positioning protrusion 222, and the third creeping glue gap 153 formed between the second groove wall 144 and the second side surface 2222 of the positioning protrusion 222, but also includes the fourth creeping glue gap 154 ​​and the fifth creeping glue gap 155 formed between the two side surfaces of the positioning protrusion 222 in the preset direction and the groove walls corresponding to the positioning groove 14. Specifically, the two groove walls of the positioning groove 14 in the preset direction are respectively provided with grooves 145 at the ends facing outward in the axial direction of the coil frame, and the fourth creeping glue gap 154 ​​and the fifth creeping glue gap 155 are formed by using the grooves 145 and the side surfaces corresponding to the positioning protrusion 222, and the punching burrs of the iron core 22 are given way. The fourth creeping glue gap 154 ​​is laterally connected to one of the second creeping glue gaps 152, and the fifth creeping glue gap 155 is laterally connected to the other second creeping glue gap 152. In this way, the adhesive liquid wraps around the positioning protrusion 222 on all four sides, thereby achieving relatively firm gluing, fixing and sealing.

[0091] Embodiment 3

[0092] See also Fig.34 , 35 As shown, an electromagnetic relay of the utility model is different from the above embodiments in that: the inner top surface of the housing 5 is provided with a second clamping protrusion 52 corresponding to each contact portion 221, and each second clamping protrusion 52 is respectively pressed against the top surface of the corresponding contact portion 221. In this way, the utility model can accurately position the coil part 2 in six directions, namely, left and right, front and back, and up and down, further improving the positioning accuracy of the coil part 2, thereby greatly improving the consistency of the mechanical parameters of the product after multiple snapping actions.

[0093] In this embodiment, each positioning protrusion 222 and the corresponding positioning groove 14 may be further fixed by glue, or may not be fixed by glue.

[0094] The electromagnetic relay of the utility model has the following parts (such as the structure and working principle of the contact part 6 and the push card 7) which are the same as those in the prior art or can be implemented by using the prior art.

[0095] The above embodiments are only used to further illustrate an electromagnetic relay of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. An electromagnetic relay, comprising a base and a coil part, the coil part comprising a coil frame, an iron core arranged on the coil frame and a coil wound on the coil frame, the iron core having two contact parts, the two contact parts respectively exposed outside the two ends of the coil frame in the axial direction, and each contact part respectively having two pole shoe surfaces arranged back to back in a preset direction, the preset direction being perpendicular to the axial direction of the coil frame; characterized in that: The two contact parts are respectively provided with positioning protrusions, and the base is respectively provided with positioning grooves corresponding to the positioning protrusions, and each positioning protrusion is respectively inserted and fixed in the corresponding positioning groove.

2. The electromagnetic relay according to claim 1, characterized in that: Each of the positioning protrusions is respectively fixed with the corresponding positioning groove by interference fit and / or glue spotting.

3. The electromagnetic relay according to claim 2, characterized in that: The positioning protrusion is located on the side of the contact portion in the axial direction of the coil frame and facing away from the coil, and the positioning protrusion protrudes from the bottom surface of the contact portion; each positioning protrusion is interference fit with the corresponding positioning groove in the preset direction and / or the axial direction of the coil frame.

4. The electromagnetic relay according to claim 3, characterized in that: The positioning protrusions on both sides of the preset direction are respectively interference fit with the corresponding positioning grooves, the positioning protrusions of the two contact parts are respectively interference fit with the corresponding positioning grooves on the side relatively outward in the axial direction of the coil frame, or the positioning protrusions of the two contact parts are respectively interference fit with the corresponding positioning grooves on the side relatively inward in the axial direction of the coil frame.

5. The electromagnetic relay according to claim 3 or 4, characterized in that: The bottom of the positioning groove is provided with a first glue dot hole that passes through the bottom surface of the base, and the first glue dot hole is connected with the first glue creeping gap and / or the lateral glue creeping gap, wherein the first glue creeping gap is formed between the bottom of the positioning groove and the bottom surface of the positioning protrusion, and the lateral glue creeping gap is formed between at least one groove wall of the positioning groove and the side surface corresponding to the positioning protrusion.

6. The electromagnetic relay according to claim 5, characterized in that: The lateral creeping gap includes at least one of a second creeping gap, a third creeping gap, a fourth creeping gap, and a fifth creeping gap, wherein the second creeping gap and the third creeping gap are respectively formed by gaps between two side surfaces of the positioning protrusion in the axial direction of the coil frame and the groove walls corresponding to the positioning groove, and the fourth creeping gap and the fifth creeping gap are respectively formed by gaps between two side surfaces of the positioning protrusion in the preset direction and the groove walls corresponding to the positioning groove.

7. The electromagnetic relay according to claim 6, characterized in that: The bottom of the positioning groove is provided with two first glue dispensing holes arranged along the preset direction, and the bottom of the positioning groove is provided with a supporting protrusion contacting and cooperating with the bottom surface of the positioning protrusion, and the supporting protrusion forms two first glue creeping gaps arranged along the preset direction between the positioning groove and the positioning protrusion, and the two first glue creeping gaps are respectively connected with the two first glue dispensing holes in a one-to-one correspondence; the positioning protrusions of the two contact parts are respectively provided with first clamping protrusions on the relatively outward sides in the axial direction of the coil frame, which are abutted against the corresponding groove walls of the corresponding positioning grooves, and the first clamping protrusion forms two second glue creeping gaps arranged along the preset direction between the positioning protrusion and the positioning groove, and the two second glue creeping gaps are respectively connected with the two first glue creeping gaps in a one-to-one correspondence; the two groove walls of the positioning groove in the preset direction are respectively provided with grooves, so that the fourth glue creeping gap and the fifth glue creeping gap are formed between the two groove walls of the positioning groove in the preset direction and the corresponding positioning protrusions.

8. The electromagnetic relay according to any one of claims 1 to 4, characterized in that: It also includes an outer shell, which is connected to the base and contains the coil part in its shell cavity; the inner top surface of the outer shell is provided with a second clamping protrusion corresponding to each contact part, and each second clamping protrusion is respectively pressed against the top surface of the corresponding contact part; the preset direction and the axial direction of the coil frame are respectively horizontal directions.

9. The electromagnetic relay according to any one of claims 1 to 4, characterized in that: The base is provided with a receiving cavity corresponding to the coil part, the coil part is installed in the receiving cavity, and the positioning groove is located in the receiving cavity.

10. The electromagnetic relay according to claim 1, characterized in that: It also includes a rotating shaft bracket and an armature part. The rotating shaft bracket includes a support frame and a rotating shaft arranged on the support frame and extending upward. The support frame is connected to the base and spans the coil part along the preset direction. The rotating shaft passes through the shaft hole set in the armature part, so that the armature part can rotate around the rotating shaft and cooperate with the coil part.

11. The electromagnetic relay according to claim 10, characterized in that: The support frame is provided with plug-in parts at the bottom of both ends in the preset direction, and the base is provided with slots corresponding to each plug-in part, and each plug-in part is respectively inserted and fixed in a corresponding slot.

12. The electromagnetic relay according to claim 11, characterized in that: The plug-in portion is fixedly matched with the slot by at least one of hot riveting, interference fit, and glue dispensing.

13. The electromagnetic relay according to claim 12, characterized in that: At least one second glue dispensing hole is provided at the bottom of the slot, and the second glue dispensing hole passes through the bottom surface of the base. A sixth glue creeping gap connecting the second glue dispensing hole is provided between the plug-in portion and the slot.

14. The electromagnetic relay according to claim 13, characterized in that: At least one hot-riveted protrusion is provided at the tail end of the plug-in part, and the hot-riveted protrusion is penetrated by a hole provided at the bottom of the slot and is hot-riveted, and the hole passes through the bottom surface of the base; the hole and the second glue dispensing hole provided at the bottom of the slot are independent of each other, or the hole is the second glue dispensing hole, and glue is dispensed after the hot-riveted protrusion is hot-riveted, and a glue dispensing clearance sink is provided on the hot-riveted protrusion.

15. The electromagnetic relay according to claim 11, characterized in that: The plug-in part and the slot are equipped with a positioning structure, which includes a positioning rib, which is arranged on one of the side surface of the plug-in part and the slot wall of the slot and extends along the depth direction of the slot, and the positioning rib is abutted against the other one of the side surface of the plug-in part and the slot wall of the slot.

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