An electromagnetic relay with a push card

Abstract

The present invention discloses an electromagnetic relay with a push card, comprising a housing, a magnetic circuit part, an armature assembly, a push card and a contact part; the armature assembly comprises an armature and a plastic part covering a part of the armature; the plastic part is provided with a plastic push arm extending in the direction of the push card; in the armature, a metal insert is also integrally extended to the plastic push arm, and the plastic push arm completely covers the metal insert. The present invention can increase the push-pull strength of the plastic push arm of the armature assembly, can adapt to a larger reaction force transmitted from the moving spring through the push card when applied to multiple groups of moving springs, and is not easily deformed by absorbing water under high temperature and high humidity, thereby ensuring the stability of the product's suction state.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to an electromagnetic relay with a push card. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. The armature is an important component in the electromagnetic relay. Through the cooperation of the armature and the magnetic circuit part of the electromagnetic relay, it can drive the dynamic spring of the contact part of the electromagnetic relay to move, and realize the closing or separation of the moving and static contacts. An electromagnetic relay in the prior art is to form an armature assembly by injection molding plastic and the armature, and to form a push arm by plastic injection molding. The push arm of the armature assembly drives the push card to move back and forth, and then the push card cooperates with the dynamic spring of the contact part to drive the dynamic spring to move, and realize the closing or separation of the moving and static contacts. In this type of electromagnetic relay with a push card, the plastic push arm of the armature assembly will be subjected to a reaction force transmitted from the moving reed through the push card. Especially when used in applications with multiple sets of moving reeds, the reaction force to which the plastic push arm of the armature assembly is subjected will be even greater. The pure plastic push arm will easily deform due to heat and water absorption in a high temperature and high humidity environment, resulting in an unstable product closure state and affecting the normal use of the electromagnetic relay. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electromagnetic relay with a push card. Through structural improvement, the push-pull strength of the plastic push arm of the armature assembly can be increased. When applied to multiple groups of moving springs, it can adapt to the larger reaction force transmitted from the moving springs through the push card. In a high temperature and high humidity environment, it is not easy to deform due to heat and water absorption, thereby ensuring the stability of the product's energized state.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an electromagnetic relay with a push card, comprising a shell, a magnetic circuit part, an armature assembly, a push card and a contact part; the magnetic circuit part, the armature assembly and the contact part are respectively installed in the preset positions of the shell, and the magnetic circuit part and the armature assembly can be matched correspondingly; the push card is matched between the armature assembly and the contact part; the armature assembly includes an armature and a plastic part covering a part of the armature; the plastic part is provided with a plastic push arm extending in the direction of the push card, the push card is provided with a first slot, and the plastic push arm of the armature assembly is matched in the first slot of the push card; in the armature, a metal insert is also integrally extended to the plastic push arm, and the plastic push arm completely covers the metal insert, so as to utilize the metal insert to increase the push-pull strength of the plastic push arm of the armature assembly, and solve the problem that the plastic push arm is easily deformed due to heat and water absorption under high temperature and high humidity environment.

[0005] The shell is divided into two layers, the magnetic circuit part and the armature assembly are assembled in the upper layer of the shell; the contact part is assembled in the lower layer of the shell, and the push card is matched with the contact part in the lower layer of the shell; the plastic push arm with a metal embedded part of the armature assembly extends from the upper layer of the shell to the lower layer of the shell and cooperates with the push card.

[0006] There are two armatures in the armature assembly; the armature assembly also includes a magnet; the magnet is clamped between the two armatures, and the plastic part covers the middle part of the two armatures and the magnet; the metal insert is arranged at the end edge of the length of one of the two armatures.

[0007] The metal inlay is bent at an angle relative to the main body surface of one of the armatures, so that the metal inlay is biased outward relative to one of the armatures; and the thickness of the metal inlay is smaller than the thickness of the main body of one of the armatures.

[0008] The metal insert includes a first portion located in a section within the width range of the body of one of the armatures and a second portion located outside the width range of the body of one of the armatures and extending from the first portion to the outside of the width.

[0009] The plastic part is provided with a rotating shaft which can be assembled in the housing; the rotating shaft deviates from the center line position of the component composed of the two armatures and one magnetic steel.

[0010] There are two push cards, and the plastic part is provided with two plastic push arms for correspondingly adapting to the two push cards. The metal embedded parts are respectively provided at both ends of the length of one of the armatures, and the two plastic push arms are respectively covered with the metal embedded parts at both ends of the length of one of the armatures.

[0011] The axes of the two plastic push arms and the axis of the rotating shaft are in the same plane.

[0012] The two push cards are respectively provided with a plurality of second card slots for cooperating with the contact portion, the plurality of second card slots are distributed along the length direction of the push card, and the first card slot is arranged between a pair of adjacent second card slots.

[0013] The contact part includes multiple groups of dynamic and static contact matching structures; each group of dynamic and static contact matching structures includes a first static spring, a first static contact, a first dynamic spring, a first dynamic contact, a second static spring, a second static contact, a second dynamic spring and a second dynamic contact; the first static contact is fixed to one end of the first static spring and one end of the first dynamic spring, the first dynamic contact is fixed to the other end of the first dynamic spring, the second static contact is fixed to one end of the second static spring and one end of the second dynamic spring, and the second dynamic contact is fixed to the other end of the second dynamic spring; the first static contact is matched with the second dynamic contact, and the second static contact is matched with the first dynamic contact; the corresponding second card slots in the two push cards are matched with the other end of the first dynamic spring and the other end of the second dynamic spring, respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The present invention adopts a metal insert extending integrally to the plastic push arm in the armature, and the plastic push arm completely covers the metal insert. This structure of the present invention can utilize the metal insert to increase the push-pull strength of the plastic push arm of the armature assembly, and can solve the drawback of the pure plastic swing arm in the prior art that it is easily deformed due to heat absorption and water absorption in a high temperature and high humidity environment, resulting in an unstable product suction state, thereby improving deformation. The present invention can also solve the problem of unstable deformation size of the pure iron swing arm during heat treatment and large dispersion of iron strip thickness between different batches. When the size of the armature assembly of the present invention needs to be adjusted, only the injection mold needs to be adjusted without adjusting the iron parts, which is more conducive to size control.

[0016] 2. The present invention divides the housing into two layers, the upper and lower layers, and the plastic push arm with metal insert of the armature assembly extends from the upper layer of the housing to the lower layer of the housing to cooperate with the push card, and the armature assembly adopts an eccentric double swing arm structure, the swing arm (i.e., the plastic push arm) is extended downward, so that the swing arm and the dynamic spring are in the same layer. With this structure of the present invention, the armature assembly can synchronously push the two push cards to move, and the push-pull contact point and the movement direction are in the same straight line.

[0017] 3. The present invention adopts a design that the contact part is designed into multiple groups of dynamic and static contact matching structures; and each group of dynamic and static contact matching structures adopts a double dynamic spring assembly in parallel. This structure of the present invention can use metal inserts to increase the strength of the plastic push arm of the armature assembly to withstand the reaction force transmitted by multiple groups of dynamic springs through the push card, thereby ensuring the stability of the product's suction state.

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay with a push card of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the armature assembly and the push card in the embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of an armature assembly according to an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the coordination of the armature assembly, the push card and the magnetic circuit part of an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of a three-dimensional structure of the armature and the magnetic steel in the armature assembly of an embodiment of the present invention;

[0024] Figure 6 This is a front view of the armature assembly, the push card and the contact part of the embodiment of the present invention;

[0025] Figure 7 is a top view of the armature assembly, the push card and the contact part of the embodiment of the present invention;

[0026] Figure 8 is a bottom view of the armature assembly, the push card and the contact part of the embodiment of the present invention;

[0027] Fig. 9It is a side view of the armature assembly, the push card and the contact part of the embodiment of the present invention;

[0028] Fig.10 is a schematic diagram of a contact portion of an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Example

[0030] See also Figures 1 to 10 As shown, an electromagnetic relay with a push card of the present invention comprises a housing 1, a magnetic circuit portion 2, an armature assembly 3, a push card 4 and a contact portion 5; the magnetic circuit portion 2, the armature assembly 3 and the contact portion 5 are respectively installed at preset positions of the housing 1, and the magnetic circuit portion 2 and the armature assembly 3 can be matched with each other; the push card 4 is matched between the armature assembly 3 and the contact portion 5; the armature assembly 3 comprises an armature 31 and a plastic part 32 covering a part of the armature; the plastic part 32 is provided with a plastic part extending in the direction of the push card The plastic push arm 321 extends outwardly, and the push card 4 is provided with a first card slot 41, and the plastic push arm 321 of the armature assembly 3 is fitted in the first card slot 41 of the push card 4; in the armature 31, a metal insert 6 is also integrally extended to the plastic push arm 321, and the plastic push arm 321 completely covers the metal insert 6, so that the metal insert 6 can be used to increase the push-pull strength of the plastic push arm 321 of the armature assembly 3, thereby solving the problem that the plastic push arm 321 is easily deformed due to heat and water absorption in a high temperature and high humidity environment.

[0031] In this embodiment, the shell 1 is divided into two layers, the upper and lower layers; the shell 1 includes an upper shell 11, a base 12, a lower shell 13 and a partition 14, the upper shell 11 and the lower shell 13 are respectively fixed to the upper end and the lower end of the base 12, and the partition 14 is installed in the base 12; the upper layer of the shell 1 is surrounded by the upper shell 11, the base 12 and the partition 14, and the lower layer of the shell 1 is surrounded by the lower shell 13, the base 12 and the partition 14, the magnetic circuit part 2 and the armature assembly 3 are assembled on the upper layer of the shell 1; the contact part 5 is assembled on the lower layer of the shell 1, and the push card 4 cooperates with the contact part 5 on the lower layer of the shell 1; the plastic push arm 321 with a metal insert of the armature assembly 3 extends from the upper layer of the shell to the lower layer of the shell and cooperates with the push card 4.

[0032] In this embodiment, the armature assembly 3 includes two armatures 31, namely, an armature 311 and an armature 312; the armature assembly 3 also includes a magnet 33; the magnet 33 is clamped between the two armatures 311, 312, and the plastic component 32 is coated on the middle part of the two armatures 311, 312 and the magnet 33, so that the armature assembly 3 forms an I-shaped structure; the metal insert 6 is arranged at the end edge of the length of one of the armatures 311, 312.

[0033] In this embodiment, the metal insert 6 is bent at an angle relative to the main body surface of one of the armatures 311, so that the metal insert 6 is biased outward relative to one of the armatures 311; and the thickness of the metal insert 6 is less than the thickness of the main body of one of the armatures 311.

[0034] In this embodiment, the metal insert 6 includes a first portion 61 located in a section within the width range of the body of one of the armatures 311 and a second portion 62 located outside the width range of the body of one of the armatures 311 and extending outward from the first portion 61 .

[0035] In this embodiment, the plastic part 32 is provided with a rotating shaft 322 that can be assembled in the housing, so that the armature assembly 3 can swing around the rotating shaft 322, so that the plastic push arm 321 can swing; the magnetic circuit part 2 includes a coil 21 and a yoke 22, and one end of the two yokes 22 of the magnetic circuit part 2 extends into the openings on both sides of the I-shaped structure of the armature assembly 3. The rotating shaft 322 deviates from the center line position of the component composed of the two armatures 311, 312 and a magnetic steel 33.

[0036] In this embodiment, there are two push cards 4, and the plastic part 32 is provided with two plastic push arms 321 for correspondingly adapting to the two push cards 4. The metal embedded parts 6 are respectively provided at both ends of the length of one of the armatures 311, and the two plastic push arms 321 are respectively covered with the metal embedded parts 6 at both ends of the length of one of the armatures 311.

[0037] In this embodiment, the axes of the two plastic push arms 321 and the axis of the rotating shaft 322 are in the same plane.

[0038] In this embodiment, the two push cards 4 are respectively provided with three second card slots 42 for cooperating with the contact portion 5 . The three second card slots 42 are distributed along the length direction of the push card 4 , and the first card slot 41 is provided between a pair of adjacent second card slots 42 .

[0039] In this embodiment, the contact portion 5 includes three groups of moving and static contact matching structures; each group of moving and static contact matching structures includes a first static spring piece 51, a first static contact 52, a first dynamic spring piece 53, a first dynamic contact 54, a second static spring piece 55, a second static contact 56, a second dynamic spring piece 57 and a second dynamic contact 58; the first static contact 52 is fixed to one end of the first static spring piece 51 and one end of the first dynamic spring piece 53, the first dynamic contact 54 is fixed to the other end of the first dynamic spring piece 53, the second static contact 56 is fixed to one end of the second static spring piece 55 and one end of the second dynamic spring piece 57, and the second dynamic contact 58 is fixed to the other end of the second dynamic spring piece 57; the first static contact 52 is matched with the second dynamic contact 58, and the second static contact 56 is matched with the first dynamic contact 53; the corresponding second card slots 42 in the two push cards 4 are matched with the other end of the first dynamic spring piece 53 and the other end of the second dynamic spring piece 57 respectively.

[0040] The electromagnetic relay with a push card of the present invention adopts a metal insert 6 that is integrally extended to the plastic push arm 321 in the armature 311, and the plastic push arm 321 completely covers the metal insert 6. This structure of the present invention can use the metal insert 6 to increase the push-pull strength of the plastic push arm 321 of the armature assembly 3, and can solve the disadvantage of the pure plastic swing arm of the prior art that it is easy to deform due to heat absorption and water absorption in a high temperature and high humidity environment, thereby improving the deformation. The present invention can also solve the problem of unstable deformation size of the pure iron swing arm during heat treatment and large dispersion of iron strip thickness between different batches. When the size of the armature assembly of the present invention needs to be adjusted, only the injection mold needs to be adjusted without adjusting the iron parts, which is more conducive to size control.

[0041] The electromagnetic relay with a push card of the present invention adopts the method of dividing the housing 1 into two layers, and extending the plastic push arm 321 with a metal insert of the armature assembly 3 from the upper layer of the housing 1 to the lower layer of the housing 1 to cooperate with the push card 4, and the armature assembly 3 adopts an eccentric double swing arm structure, and the swing arm (i.e., the plastic push arm) is extended downward so that the swing arm and the moving spring are in the same layer. With this structure of the present invention, the armature assembly 3 can synchronously push the two push cards 4 to move, and make the push-pull contact point and the movement direction in the same straight line.

[0042] The electromagnetic relay with a push card of the present invention adopts a contact part 5 designed as three sets of dynamic and static contact matching structures; and each set of dynamic and static contact matching structures adopts a double spring assembly in parallel. This structure of the present invention can use a metal insert 6 to increase the strength of the plastic push arm 321 of the armature assembly 3 to withstand the reaction force transmitted by the three sets of dynamic springs through the push card 4, thereby ensuring the stability of the product's closed state.

[0043] 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. An electromagnetic relay with a push card, comprising a housing, a magnetic circuit part, an armature assembly, a push card and a contact part; the magnetic circuit part, the armature assembly and the contact part are respectively installed at preset positions of the housing, and the magnetic circuit part and the armature assembly can be matched correspondingly; the push card is matched between the armature assembly and the contact part; the armature assembly includes an armature and a plastic part covering a part of the armature; the plastic part is provided with a plastic push arm extending in the direction of the push card, the push card is provided with a first slot, and the plastic push arm of the armature assembly is matched in the first slot of the push card; characterized in that: In the armature, a metal insert is integrally extended to the plastic push arm, and the plastic push arm completely covers the metal insert, so as to utilize the metal insert to increase the push-pull strength of the plastic push arm of the armature assembly, thereby solving the problem that the plastic push arm is easily deformed due to heat and water absorption in a high temperature and high humidity environment.

2. The electromagnetic relay with a push card according to claim 1, characterized in that: The shell is divided into two layers, the magnetic circuit part and the armature assembly are assembled in the upper layer of the shell; the contact part is assembled in the lower layer of the shell, and the push card is matched with the contact part in the lower layer of the shell; the plastic push arm with a metal embedded part of the armature assembly extends from the upper layer of the shell to the lower layer of the shell and cooperates with the push card.

3. The electromagnetic relay with a push card according to claim 1 or 2, characterized in that: There are two armatures in the armature assembly; the armature assembly also includes a magnet; the magnet is clamped between the two armatures, and the plastic part covers the middle part of the two armatures and the magnet; the metal insert is arranged at the end edge of the length of one of the two armatures.

4. The electromagnetic relay with a push card according to claim 3, characterized in that: The metal inlay is bent at an angle relative to the main body surface of one of the armatures, so that the metal inlay is biased outward relative to one of the armatures; and the thickness of the metal inlay is smaller than the thickness of the main body of one of the armatures.

5. The electromagnetic relay with a push card according to claim 4, characterized in that: The metal insert includes a first portion located in a section within the width range of the body of one of the armatures and a second portion located outside the width range of the body of one of the armatures and extending from the first portion to the outside of the width.

6. The electromagnetic relay with a push card according to claim 3, characterized in that: The plastic part is provided with a rotating shaft which can be assembled in the housing; the rotating shaft deviates from the center line position of the component composed of the two armatures and one magnetic steel.

7. The electromagnetic relay with a push card according to claim 6, characterized in that: There are two push cards, and the plastic part is provided with two plastic push arms for correspondingly adapting to the two push cards. The metal embedded parts are respectively provided at both ends of the length of one of the armatures, and the two plastic push arms are respectively covered with the metal embedded parts at both ends of the length of one of the armatures.

8. The electromagnetic relay with a push card according to claim 7, characterized in that: The axes of the two plastic push arms and the axis of the rotating shaft are in the same plane.

9. The electromagnetic relay with a push card according to claim 7, characterized in that: The two push cards are respectively provided with a plurality of second card slots for cooperating with the contact portion, the plurality of second card slots are distributed along the length direction of the push card, and the first card slot is arranged between a pair of adjacent second card slots.

10. The electromagnetic relay with a push card according to claim 9, characterized in that: The contact part includes a plurality of groups of moving and static contact matching structures; each group of moving and static contact matching structures includes a first static spring, a first static contact, a first dynamic spring, a first dynamic contact, a second static spring, a second static contact, a second dynamic spring and a second dynamic contact; the first static contact is fixed to one end of the first static spring and one end of the first dynamic spring, the first dynamic contact is fixed to the other end of the first dynamic spring, the second static contact is fixed to one end of the second static spring and one end of the second dynamic spring, and the second dynamic contact is fixed to the other end of the second dynamic spring; the first static contact is matched with the second dynamic contact, and the second static contact is matched with the first dynamic contact; The corresponding second card slots in the two push cards are matched with the other end of the first movable spring piece and the other end of the second movable spring piece respectively.

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