Electromagnetic relay with pushing card and armature matching structure

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By using an inverted trapezoidal structure and slope mating surface in the electromagnetic relay, the lever principle drives the mating structure between the push card and the contact part, the friction and loosening problems between the armature and the push card are solved, and the reliability and production of electrical contact are improved. efficiency.

CN222320120UActive Publication Date: 2025-01-07SHENZHEN ZHONGKE ZHILIAN ELECTRONICS CO LTD

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Patent Information

Application Number: CN202421095757.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-20
Publication Date: 2025-01-07
Estimated Expiration: 2034-05-20

AI Technical Summary

Technical Problem

In existing electromagnetic relays, the mating structure of the armature and push card is prone to produce plastic powder during assembly, which affects the reliability of electrical contact and is easy to loosen, resulting in the failure of the relay. The design tolerance of the assembly structure requires high accuracy, high manufacturing difficulty, and affects the Productivity.

Method used

An electromagnetic relay including a base, armature, push card and magnetic circuit part is designed. The lever principle drives the matching structure between the push card and the contact part, adopts an inverted trapezoidal structure and slope fitting surface to reduce friction and improve assembly consistency. Ensure accurate positioning and stable connection between the armature and the push card.

Benefits of technology

It effectively avoids the generation of plastic powder during assembly, improves smooth motion and electrical contact reliability, reduces manufacturing difficulty and tolerance requirements, and improves the consistency and production efficiency of the assembly structure.

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Abstract

The utility model relates to the field of relays, and discloses an electromagnetic relay with a push card and armature matching structure, which comprises a base, a first assembly boss is arranged in the middle of one end of an armature, a groove is arranged on one side of the armature on the first assembly boss, and a first projection is arranged in the middle of one side of the first assembly boss on the groove. A notch matched with the first protruding part is formed in the middle, located on the outer side of the matching groove, of the pushing clamp, a second protruding part is arranged in the middle of the side, away from the notch, of the matching groove, and the second protruding part makes contact with the middle of the side, away from the first protruding part, of the armature in an abutting mode. A second assembling boss matched with the groove is arranged in the middle of the side, away from the notch, of the pushing clamp. According to the utility model, the designed matching structure of the pushing card and the armature prevents plastic dust generated during assembly from influencing the reliability of electric contact, reduces the manufacturing difficulty, and improves the consistency of the assembly structure.

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Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay with a push card and an armature matching structure. Background Art

[0002] Relays are electromechanical components used in various automatic control industries. Since the armature and push card are the moving parts in the relay device, the stability and accuracy of the movement of their matching structure are extremely high, and it is difficult to ensure accuracy and consistency during the assembly process.

[0003] In the existing electromagnetic relay, the matching structure of the armature and the push card is easy to produce plastic powder during assembly due to the mutual friction between the plastic push card and the metal armature, thereby affecting the reliability of electrical contact.

[0004] Meanwhile, in the prior art electromagnetic relay, the push card is simultaneously subjected to the thrusts of the moving spring and the armature, and the matching structure of the push card and the armature is easily loosened during the operation process, causing the relay to fail.

[0005] In addition, the assembly structure design tolerance of the push card and the armature of the existing relay requires high precision, the production of parts is difficult, and the consistency control of product assembly is affected, thereby reducing production efficiency. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose an electromagnetic relay with a push card and an armature matching structure, wherein the matching structure of the armature and the push card avoids the generation of plastic powder during assembly, and at the same time accurately matches and positions according to the movement trajectory of the push card to prevent the loosening of the matching structure of the push card and the armature.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electromagnetic relay with a push card and an armature matching structure, comprising a base, a contact portion is arranged at the head end of the upper side of the base, a magnetic circuit portion is arranged inside the base, an armature is arranged at the output end of the magnetic circuit portion, the armature is arranged at the tail end of the upper side of the base, a push card is arranged between the armature and the contact portion, the magnetic circuit portion drives the armature to drive the push card to transfer force to the contact portion through the lever principle, a first assembly boss is arranged in the middle of one end of the armature, and the armature position A groove is provided on one side of the first assembly boss, and a first protrusion is provided on the middle part of one side of the groove of the first assembly boss, a matching groove matched with the first assembly boss is provided at the assembly connection between the push card and the armature, a recess matched with the first protrusion is provided on the middle part of the outer side of the matching groove of the push card, a second protrusion is provided on the middle part of the side of the matching groove away from the recess, the second protrusion is in abutment contact with the middle part of the side of the armature away from the first protrusion, and a second assembly boss matched with the groove is provided on the middle part of the side of the push card away from the recess.

[0008] As a further description of the above technical solution:

[0009] The groove is an inverted trapezoidal structure with a wide opening and a narrow bottom, and the second assembly boss is an inverted trapezoidal structure with a wide root and a narrow end, and the second assembly boss is arranged in the groove.

[0010] As a further description of the above technical solution:

[0011] The first protrusion is a trapezoidal structure with a wide root and a narrow end. The matching groove is arranged along the width direction of the push card, and the first protrusion is arranged in the matching groove.

[0012] As a further description of the above technical solution:

[0013] A sloped matching surface is arranged at the entrance of the matching groove.

[0014] As a further description of the above technical solution:

[0015] The cross section of the first protrusion is a triangle with the base facing downward, and the first protrusion is arranged in the recess.

[0016] As a further description of the above technical solution:

[0017] The contact portion comprises a stationary contact piece and a moving contact piece, wherein the stationary contact piece is arranged at the head end of the base, and the moving contact piece is arranged between the stationary contact piece and the push card, and the moving contact piece is in abutment contact with the push card.

[0018] As a further description of the above technical solution:

[0019] The contact point between the push card and the moving contact piece is provided with an inserting portion, and the moving contact piece is provided with a slot matched with the inserting portion.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the matching groove formed between the second protrusion on the push card and the second assembly boss has a cross-section that is narrow at the top and wide at the bottom, which facilitates the first protrusion on the armature to slide in smoothly and accurately during assembly, reduces friction, and thus avoids the generation of plastic powder during assembly; at the same time, this design can also make the mutual movement between the armature and the push card after assembly a linear contact, thereby improving the smoothness of movement.

[0022] 2. In the present invention, the entrance of the matching groove on the push card adopts a sloped assembly surface and a trapezoidal recess shape, which can make the manufacturing tolerance of the armature and the push card assembly structure can be set relatively loose, reduce the manufacturing difficulty, and improve the consistency of the assembly structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0024] Figure 2 This is a front view of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0025] Figure 3 This is a schematic diagram of the armature structure of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of a push card structure of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0027] Figure 5 This is a schematic diagram from another perspective of a push card structure of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0028] Figure 6 This is a schematic diagram of the armature and push card cooperation of an electromagnetic relay with a push card and armature cooperation structure proposed by the utility model;

[0029] Figure 7 A side cross-sectional view of a push card of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0030] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0031] Fig. 9A side view of an armature of an electromagnetic relay with a push card and an armature matching structure proposed by the utility model;

[0032] Fig.10 for Figure 1 Enlarged view of point A in the middle.

[0033] Legend:

[0034] 1. Base; 2. Armature; 201. Groove; 202. First assembly boss; 203. First protrusion; 3. Push card; 301. Matching groove; 302. Second protrusion; 303. Notch; 304. Second assembly boss; 305. Insertion part; 4. Stationary contact piece; 401. Moving contact piece. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figure 1-10 As shown, an embodiment of the present invention provides an electromagnetic relay with a push card and an armature matching structure, including a base 1, a contact portion is arranged at the head end of the upper side of the base 1, a magnetic circuit portion is arranged inside the base 1, an armature 2 is arranged at the output end of the magnetic circuit portion, the armature 2 is arranged at the tail end of the upper side of the base 1, a push card 3 is arranged between the armature 2 and the contact portion, the magnetic circuit portion drives the armature 2 to move and drives the push card 3 to transmit force to the contact portion through the lever principle, wherein the magnetic circuit portion is arranged inside the shell of the base 1, which is a prior art, and its structure and working principle are well known to those skilled in the art;

[0037] Reference Figure 3-6 A first assembly boss 202 is provided in the middle of one end of the armature 2, and a matching groove 301 adapted to the first assembly boss 202 is provided at the assembly connection between the push card 3 and the armature 2;

[0038] Specifically, the first assembly boss 202 is located at the top of the armature 2 during assembly, and is used to be inserted into the matching groove 301 on the push card 3;

[0039] Reference Figure 3-6The armature 2 is provided with a groove 201 on one side of the first assembly boss 202, and a second assembly boss 304 matching the groove 201 is provided in the middle of the side of the push card 3 away from the notch 303. The groove 201 is an inverted trapezoidal structure with a wide opening and a narrow bottom, and the second assembly boss 304 is an inverted trapezoidal structure with a wide root and a narrow end. The second assembly boss 304 is arranged in the groove 201;

[0040] Specifically, the groove 201 is located at the outer side of the top of the armature 2 when it is assembled. The groove 201 is an inverted trapezoidal structure that is wide at the top and narrow at the bottom, and is used to smoothly slide into and fit with the second assembly boss 304 on the push card 3, and at the same time, the armature 2 and the push card 3 are accurately positioned in the left and right directions when they are assembled;

[0041] Reference Figure 3-6 The first assembly boss 202 is located in the middle of one side of the groove 201 and is provided with a first protrusion 203. The push card 3 is located in the middle of the outer side of the matching groove 301 and is provided with a recess 303 adapted to the first protrusion 203. The first protrusion 203 is arranged in the recess 303. The first protrusion 203 is a trapezoidal structure with a wide root and a narrow end. The matching groove 301 is arranged along the width direction of the push card 3, and the first protrusion 203 is arranged in the matching groove 301;

[0042] Specifically, the first protrusion 203 is located at the middle part of the outer side of the first assembly boss 202 during assembly, and is used to slide into the notch 303 on the push card 3 during assembly, so that the notch 303 clamps the first protrusion 203, so that the armature 2 and the push card 3 can maintain a stable connection state during the action process;

[0043] Furthermore, the cross section of the first protrusion 203 is a triangle with the bottom side facing downwards;

[0044] Reference Figure 3-6 A second protrusion 302 is provided in the middle of the side of the matching groove 301 away from the notch 303, and the second protrusion 302 abuts against the middle of the side of the armature 2 away from the first protrusion 203.

[0045] Specifically, the second protrusion 302 is located at the center opposite to the second assembly boss 304 of the push card 3. The second protrusion 302 cooperates with the second assembly boss 304 to accurately position the armature 2 in the front-to-back direction. At the same time, the second protrusion 302 serves as a force point for the armature 2 to push the push card 3.

[0046] Reference Figure 8 , further, a sloped mating surface is provided at the entrance of the mating groove 301;

[0047] Specifically, the matching groove 301 formed between the second protrusion 302 and the second assembly boss 304 on the push card 3 has a cross-section that is narrow at the top and wide at the bottom, so that the first protrusion 203 on the armature 2 can slide in smoothly and accurately during assembly, reducing friction and thus avoiding the generation of plastic powder during assembly; at the same time, this design can also make the mutual movement between the armature 2 and the push card 3 after assembly a linear contact, thereby improving the smoothness of movement;

[0048] Reference Fig.10 The contact portion includes a stationary contact piece 4 and a moving contact piece 401, the stationary contact piece 4 is arranged at the head end of the base 1, the moving contact piece 401 is arranged between the stationary contact piece 4 and the push card 3, and the moving contact piece 401 is in abutment contact with the push card 3;

[0049] Specifically, the magnetic circuit drives the armature 2 to move, and drives the push card 3 to transfer force to the contact part through the lever principle, so that the push card 3 pushes the moving contact piece 401 to make it contact with the stationary contact piece 4;

[0050] Furthermore, a plug-in portion 305 is provided at the contact point between the push card 3 and the movable contact piece 401, and the movable contact piece 401 is provided with a slot adapted to the plug-in portion 305;

[0051] Specifically, the inserting portion 305 and the slot on the moving contact piece 401 that matches the inserting portion 305 make it more stable when the pushing card 3 pushes the moving contact piece 401 .

[0052] In the above embodiment, when the armature 2 and the push card 3 are assembled, the first assembly boss 202 is inserted into the matching groove 301 on the push card 3, and the first protrusion 203 slides into the recess 303 of the push card 3, so that the armature 2 is accurately positioned in the up and down directions. At the same time, because the lower edge plane of the first protrusion 203 and the upper edge plane of the recess 303 of the push card 3 cooperate with each other after assembly, the armature 2 and the push card 3 can be well prevented from loosening during movement;

[0053] At the same time, the entrance of the matching groove 301 on the push card 3 adopts a sloped assembly surface and the recess 303 is trapezoidal in shape, so that the manufacturing tolerance of the assembly structure of the armature 2 and the push card 3 can be set relatively loose, reducing the manufacturing difficulty and improving the consistency of the assembly structure.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic relay with a push card and an armature matching structure, comprising a base (1), a contact portion being arranged at the head end of the upper side of the base (1), a magnetic circuit portion being arranged inside the base (1), an armature (2) being arranged at the output end of the magnetic circuit portion, the armature (2) being arranged at the tail end of the upper side of the base (1), a push card (3) being arranged between the armature (2) and the contact portion, the magnetic circuit portion driving the armature (2) to move and driving the push card (3) to transfer force to the contact portion through the lever principle, characterized in that: A first assembly boss (202) is provided in the middle of one end of the armature (2); a groove (201) is provided on one side of the first assembly boss (202) of the armature (2); a first protrusion (203) is provided in the middle of one side of the groove (201) of the first assembly boss (202); a matching groove (301) adapted to the first assembly boss (202) is provided at the assembly connection between the push card (3) and the armature (2); the push card (3) is located in the matching groove A notch (303) matching with the first protrusion (203) is arranged in the middle of the outer side (301), a second protrusion (302) is arranged in the middle of the side of the matching groove (301) away from the notch (303), the second protrusion (302) is in abutment contact with the middle of the side of the armature (2) away from the first protrusion (203), and a second assembly boss (304) matching with the groove (201) is arranged in the middle of the side of the push card (3) away from the notch (303).

2. The electromagnetic relay with a push card and armature matching structure according to claim 1, characterized in that: The first protrusion (203) is a trapezoidal structure with a wide base and a narrow end. The matching groove (301) is arranged along the width direction of the push card (3), and the first protrusion (203) is arranged in the matching groove (301).

3. The electromagnetic relay with a push card and armature matching structure according to claim 2, characterized in that: A sloped matching surface is provided at the entrance of the matching groove (301).

4. The electromagnetic relay with a push card and armature matching structure according to claim 1, characterized in that: The cross section of the first protrusion (203) is a triangle with the base facing downwards, and the first protrusion (203) is arranged in the recess (303).

5. The electromagnetic relay with a push card and armature matching structure according to claim 1, characterized in that: The contact portion comprises a stationary contact piece (4) and a moving contact piece (401); the stationary contact piece (4) is arranged at the head end of the base (1); the moving contact piece (401) is arranged between the stationary contact piece (4) and the push card (3); and the moving contact piece (401) and the push card (3) are in abutment contact.

6. The electromagnetic relay with a push card and armature matching structure according to claim 5, characterized in that: The contact point between the push card (3) and the moving contact piece (401) is provided with an inserting portion (305), and the moving contact piece (401) is provided with a slot matching the inserting portion (305).