Armature part and push card connecting structure and electromagnetic relay

Abstract

The application discloses an armature part and push card connecting structure and an electromagnetic relay. The connecting structure comprises an armature part and a push card. The push card is made of thermosetting material. The armature part is provided with an elastic clamping structure. The elastic clamping structure is deformed by stress and is freely arranged in the push card in the deformed state. After the elastic clamping structure is released, the elastic clamping structure is restored and clamped with the push card. The application can improve the high-temperature resistance of the push card by using the characteristics of high chemical resistance, heat resistance and difficulty in deformation of the thermosetting material. The application can avoid the deformation or melting of the push card under the condition of large current, thereby affecting the normal work of the relay. On the other hand, the armature part and the push card can be connected by clamping. The connection is simple, and plastic chips caused by assembly friction of the armature part and the push card can be avoided.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to an armature part and a drive card connection structure and an electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an electronic control device that is commonly used in automatic control circuits. It is essentially an "automatic switch" that uses a smaller current to control a larger current, thus playing roles such as automatic adjustment, safety protection, and circuit switching in circuits.

[0003] An existing electromagnetic relay includes a base, a magnetic circuit section, a moving spring section, a stationary spring section, and a pusher clip. The magnetic circuit section engages with the moving spring section via the pusher clip. The pusher clip is typically supported by a thermoplastic material. When connected to the armature section of the magnetic circuit section, the elastic deformation of the thermoplastic material is used for clamping to avoid plastic debris during assembly. However, under a high load of 180A, the thermoplastic material is prone to heat deformation at high temperatures. Furthermore, thermoplastic materials have poor heat resistance. When the contacts break and generate an electric arc, the contact area between the pusher clip and the moving spring section melts rapidly under the continuous heat of the arc. This shortens the effective stroke of the pusher clip pushing the moving spring section, preventing the moving contact on the moving spring section from effectively contacting the stationary contact on the stationary spring section, ultimately causing the relay to malfunction. Some existing technologies use a sliding rail to connect the pusher clip to the relay base, allowing the armature section to contact the pusher clip. While this method avoids plastic debris, it causes the pusher clip's actuation point to change with the armature's swing angle, resulting in poor product parameter consistency. Summary of the Invention

[0004] This invention addresses the existing technical problems by providing a connection structure between the armature and the push card, as well as an electromagnetic relay. Through structural improvements, it not only prevents the push card from deforming or melting due to heat, but also enables chip-free installation.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an armature part and a push card connection structure, including an armature part and a push card, wherein the push card is made of thermosetting material, the armature part is provided with an elastic locking structure, the elastic locking structure deforms under force and passes through the push card without obstruction in the deformed state, and the elastic locking structure is released and then returns to its original state to engage with the push card.

[0006] Furthermore, the elastic locking structure includes two parallel locking arms, which retract inward under force and pass through the push card in the retracted state. After being released, the two locking arms expand outward relative to each other to engage with the push card. One end of the push card is provided with a locking hole suitable for engaging with the armature part. The locking hole is elongated and extends along the arrangement direction of the two locking arms. Furthermore, the two locking arms are respectively provided with a limiting groove on their opposite outer ends, and the two limiting grooves respectively engage with the two ends of the locking hole.

[0007] Furthermore, the armature portion is provided with a push block located between its two locking arms, and the push block passes through the locking hole.

[0008] Furthermore, the inner side of the card hole near the other end of the push card is provided with clearance grooves corresponding to the positions of the two card arms, so as to avoid the card arms.

[0009] Furthermore, the armature portion includes an armature, a plastic part, and a metal part. The armature and the metal part are fixedly connected by the plastic part or injection molded together by an insert, and the armature and the metal part are separated by the plastic part. The metal part is provided with the elastic locking structure. Alternatively, the armature portion is an armature. The armature portion is L-shaped.

[0010] The present invention also provides an electromagnetic relay, including a moving spring portion and a pusher card, and further including an armature portion and a pusher card connection structure as described above, wherein the pusher card is connected to the moving spring portion.

[0011] Furthermore, the push card is provided with a first slot, and one side of the moving spring portion is provided with a second slot, the first slot and the second slot engaging with each other; the three sides of the second slot are respectively provided with flanges bent towards one side in the thickness direction of the part where the second slot is located.

[0012] Furthermore, there are two moving springs arranged side by side, and there are two first slots arranged back to back.

[0013] Furthermore, the movable spring portion is provided with a plurality of movable contacts arranged in parallel, and the pusher is provided with a pusher rib for pushing the movable spring portion to move. The pusher rib is located on the opposite side of the movable contacts and extends along the arrangement direction of the plurality of movable contacts.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Because the push card is made of thermosetting material, and the armature portion has an elastic locking structure, this elastic locking structure deforms under force and passes through the push card without obstruction in the deformed state. After being released, the elastic locking structure returns to its original position and engages with the push card. This invention, on the one hand, utilizes the high chemical resistance, heat resistance, and non-deformation properties of thermosetting materials to improve the high-temperature resistance of the push card, preventing deformation or melting of the push card under high current loads, which could affect the normal operation of the relay. On the other hand, it allows the armature portion and the push card to be connected by a snap-fit ​​method, which is not only simple to connect but also avoids the generation of plastic shavings due to assembly friction between the armature portion and the push card. It also overcomes the technical prejudice that thermosetting materials lack elastic deformation capabilities and are unsuitable for snap-fit ​​installation. Furthermore, this invention enables the push card to move synchronously with the armature portion, preventing changes in the push point of the push card from affecting the consistency of product parameters.

[0016] 2. The elastic locking structure preferably includes the two locking arms, which has the characteristics of simple structure, easy molding and convenient assembly.

[0017] 3. The design of the push block provides a larger contact surface between the armature and the push card, resulting in a more stable fit. The design of the clearance groove prevents the push block from affecting effective contact with the push card when the two card arms are not flat enough to match the push block.

[0018] 4. The setting of the pushing ribs enables the present invention to ensure that multiple moving contact points are subjected to force balance and achieve synchronous action.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the connection structure between the armature part and the push card and the electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the armature portion of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the push card of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the armature portion and the pusher clip of the present invention in an assembled state;

[0023] Figure 4 This is a three-dimensional structural schematic diagram of the electromagnetic relay of the present invention (excluding the outer casing);

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the moving spring portion of the present invention Figure 1 ;

[0025] Figure 6This is a three-dimensional structural schematic diagram of the first flexible copper foil sheet of the present invention;

[0026] Figure 7 This is a three-dimensional structural schematic diagram of the second flexible copper foil sheet of the present invention;

[0027] Figure 8 This is a three-dimensional structural schematic diagram of the elastic sheet of the present invention;

[0028] Figure 9 yes Figure 8 An enlarged schematic diagram of part A in the middle;

[0029] Figure 10 This is a three-dimensional structural diagram of the moving spring portion of the present invention. Figure 2 (excluding the first flexible copper foil);

[0030] Figure 11 This is a top view of the push card and the moving spring in the combined state of the present invention (the moving spring is shown in part);

[0031] Among them, 1. Rigid moving spring, 11. First lug, 2. Rigid moving spring lead-out foot, 21. Second lug, 3. Moving contact, 4. First flexible copper foil, 41. Long strip hole, 5. Second flexible copper foil, 51 / 61. Second bifurcated groove, 6. Elastic sheet, 62. Second slot, 63. Flanged edge, 7. Rotating shaft, 8. Armature part, 81. Armature, 82. Plastic part, 83. Metal part, 831. Locking arm, 832. Push block, 833. Limiting groove, 834. First bifurcated groove, 9. Pushing lock, 91. Locking hole, 911. Relief groove, 92. First slot, 93. Long rod, 931. Pushing rib, 10. Base, 20. Static spring part. Detailed Implementation

[0032] In this invention, the terms "first," "second," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more, and "at least one" refers to one or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Please see Figures 1-3As shown, the present invention provides a connection structure between an armature portion and a pusher 9, comprising an armature portion 8 and a pusher 9. The pusher 9 is made of thermosetting material. The armature portion 8 is provided with an elastic locking structure. The elastic locking structure deforms under force and passes through the pusher 9 without obstruction in the deformed state. After the elastic locking structure is released, it returns to its original state and engages with the pusher 9.

[0034] The elastic locking structure includes two locking arms 831 arranged in parallel. The two locking arms 831 are pulled inward relative to each other when subjected to force, and are inserted into the push card 9 in the pulled-in state. After the two locking arms 831 are released, they are opened outward relative to each other and are engaged with the push card 9.

[0035] like Figure 1 As shown, the armature portion 8 specifically includes an armature 81, a plastic part 82, and a metal part 83. The armature 81 and the metal part 83 are fixedly connected or injection molded together by the plastic part 82, and the armature 81 and the metal part 83 are separated by the plastic part 82. This improves the creepage distance between the magnetic circuit part and the contact part of the relay. The metal part 83 can be replaced by a part made of other materials with good rigidity and high temperature resistance. The armature portion 8 is L-shaped, but not limited to this. The armature portion 8 is provided with a push block 832 located between its two locking arms 831, and the armature portion 8 is provided with a first bifurcation groove 834 between its two locking arms 831 and the push block 832. Specifically, the push block 832 and the locking arms 831 are respectively provided on the metal part 83, and the metal part 83 forms the two locking arms 831 and the push block 832 by providing two first bifurcation grooves 834. The two locking arms 831 are respectively provided with a limiting groove 833 on their opposite outer sides at their tail ends, and the limiting groove 833 penetrates both sides of the metal part 83 in the thickness direction. In other embodiments, the armature part is an entire armature, in which case the armature is provided with an elastic locking structure and a pushing block.

[0036] like Figure 2As shown, one end of the push card 9 is provided with a locking hole 91 suitable for engaging with the armature portion. The locking hole 91 is elongated and extends along the arrangement direction of the two locking arms 831. The distance between the two opposite inner surfaces of the limiting groove 833 is slightly greater than the depth of the locking hole 91, so that after the two locking arms 831 are spread outwards relative to each other, the two limiting grooves 833 can engage with the two ends of the locking hole 91 to achieve the effect of limiting and preventing disengagement. The push block 832 passes through the locking hole 91, and the armature portion 8 drives the push card 9 to move through the push block 832. The inner surface of the locking hole 91 near the other end of the push card 9 is provided with relief grooves 911 corresponding to the positions of the two locking arms 831 to avoid the locking arms 831, thereby preventing the two locking arms 831 from having inconsistent flatness with the push block 832, which would affect the effective contact between the push block 832 and the push card 9.

[0037] The present invention discloses a connection structure between an armature portion and a pusher clip. The assembly method of the armature portion 8 and the pusher clip 9 is as follows: First, a tooling clamps the two clamping arms 831 of the armature portion 8, causing the two clamping arms 831 to retract inwards to form an inward V-shape. Then, the tail ends of the two clamping arms 831 and the tail end of the pusher block 832 are passed through the clip hole 91 of the pusher clip 9. Next, the two clamping arms 831 of the armature portion 8 are released, causing the two clamping arms 831 to return to their original outward orientation, thereby allowing the limiting grooves 833 on the two clamping arms 831 to engage with the two ends of the clip hole 91. Figure 3 As shown, this achieves a stable and secure connection between the push card 9 and the armature part 8, and prevents plastic shavings from being scraped off during installation.

[0038] This invention discloses a connection structure between the armature portion and the push card. The push card 9 is made of a thermosetting material, which allows the invention to utilize the high chemical resistance, heat resistance, and non-deformation properties of thermosetting materials to improve the high-temperature resistance of the push card 9. This prevents the push card 9 from deforming or melting under high current loads, thus affecting the normal operation of the relay. The assembly of the armature portion 8 and the push card 9 in this manner not only improves the ease of connection between the armature portion 8 and the thermosetting push card 9 but also prevents the generation of plastic shavings due to assembly friction. Furthermore, this invention enables the push card 9 to move synchronously with the armature portion 8, preventing changes in the push point of the push card 9 from affecting the consistency of product parameters.

[0039] Please see Figures 1-11 As shown, an electromagnetic relay of the present invention includes a base 10, a stationary spring portion 20, and a housing (not shown in the figure), with the moving spring portion and the stationary spring portion 20 respectively disposed on the base 10. The present invention also includes a connection structure between the armature portion and the pusher 9 as described above, wherein the pusher 9 is connected to the moving spring portion.

[0040] The moving spring portion includes a rigid moving spring plate 1 and at least one moving contact 3. One end of the rigid moving spring plate 1 is rotatably configured, allowing the rigid moving spring plate 1 to swing about its rotation axis. The moving spring portion also includes a conductive flexible deformation structure electrically connected to the other end of the rigid moving spring plate 1, and the moving contact 3 is disposed on the flexible deformation structure.

[0041] The movable spring portion also includes a rigid movable spring lead-out foot 2 and a first flexible conductive element. The rigid movable spring lead-out foot 2 is inserted into the base. Both ends of the first flexible conductive element are electrically connected to the rigid movable spring plate 1 and the rigid movable spring lead-out foot 2, respectively, and the three form a U-shaped structure. Specifically, the flexible deformation structure includes at least one second flexible conductive element and at least one elastic sheet 6. One end of the second flexible conductive element and one end of the elastic sheet 6 are fixedly connected to the other end of the rigid movable spring plate 1, and the other end of the second flexible conductive element and the other end of the elastic sheet 6 are fixedly connected to the movable contact 3. There are multiple movable contacts 3, arranged side-by-side, specifically along the width direction of the rigid movable spring plate 1. The number of movable contacts 3 is specifically two, but not limited to this.

[0042] The first flexible conductive element is a first flexible copper foil sheet 4, which is U-shaped. In other embodiments, the first flexible conductive element is a copper wire, aluminum wire, or braided wire, etc. The two ends of the first flexible copper foil sheet 4 are riveted and fixed to the rigid moving spring sheet 1 and the rigid moving spring lead-out foot 2, respectively. Therefore, multiple riveting holes are provided at the corresponding positions of the two ends of the first flexible copper foil sheet 4, the rigid moving spring sheet 1, and the rigid moving spring lead-out foot 2. Thus, the connection of the first flexible conductive element (i.e., the first flexible copper foil sheet 4) does not require welding, thereby greatly simplifying the connection process between the first flexible conductive element and the rigid moving spring sheet 1 and the rigid moving spring lead-out foot 2. The first flexible copper foil sheet 4 has at least one elongated hole 41, which extends along the length of the first flexible copper foil sheet 4. The number of elongated holes 41 is specifically one, but not limited to this, and the two ends of the elongated hole 41 extend towards the two ends of the first flexible copper foil sheet 4, respectively. The elongated hole 41 can improve the flexibility of the first flexible copper foil sheet 4.

[0043] The second flexible conductive element is a second flexible copper foil sheet 5, which is stacked together with the elastic sheet 6. The number of second flexible copper foil sheets 5 is multiple, but not limited to this. The contact surface of the moving contact 3 and the elastic sheet 6 are located on opposite sides of the second flexible copper foil sheet 5 in the thickness direction. One end of the second flexible copper foil sheet 5, one end of the elastic sheet 6, and the other end of the rigid moving spring sheet 1 are riveted together. The other end of the second flexible copper foil sheet 5, the other end of the elastic sheet 6, and the moving contact 3 are also riveted together. Therefore, riveting holes are provided at both ends of the second flexible copper foil sheet 5, both ends of the elastic sheet 6, and the other end of the rigid moving spring sheet 1. In other embodiments, the second flexible conductive element is a copper wire, aluminum wire, or braided wire, etc. The elastic sheet 6 is made of stainless steel and has the characteristics of good elasticity, low heat generation, and good thermal stability.

[0044] The flexible deformable structure has a second bifurcation groove between adjacent moving contacts 3, causing the flexible deformable structure to bifurcate into multiple branches arranged in parallel, each branch having one of the moving contacts 3. The number of branches is specifically two, but not limited to this. The second bifurcation groove is specifically composed of a second bifurcation groove 51 extending from one end to the other on the second flexible copper foil 5 and a second bifurcation groove 61 extending from one end to the other on the elastic sheet 6. The second bifurcation groove ensures that each moving contact 3 effectively contacts its corresponding stationary contact even when the heights of the multiple moving contacts 3 are inconsistent.

[0045] One end of the rigid moving spring 1 is rotatably connected to one end of the rigid moving spring lead 2 via a rotating shaft 7. Specifically, as shown in the figure... Figure 10 As shown, the rigid moving spring 1 has two first lugs 11 on both sides of one end, and the rigid moving spring lead 2 has two second lugs 21 on one end. The two first lugs 11 are located between the two second lugs 21 and are connected together by the rotating shaft 7. In other embodiments, the rigid moving spring is rotatably connected to the base and electrically connected to the rigid moving spring lead inserted into the base by a flexible conductive element.

[0046] The rigid moving spring 1 and the flexible deformation structure are connected to the other end of the push card 9 at their connection points. This allows for a longer rotational force arm and a longer contact overtravel force arm for the rigid moving spring 1, making it easier to push the push card 9. The other end of the push card 9 has a first slot 92, and the corresponding part of the moving spring has a second slot 62. The first slot 92 and the second slot 62 engage with each other. Since there are two moving springs, there are also two first slots 92, each U-shaped and facing away from each other.

[0047] The second slot 62 is specifically disposed on the elastic sheet 6 and passes through the rigid moving spring sheet 1 and the second flexible copper foil sheet 5. The three sides of the second slot 62 are respectively provided with flanges 63 bent towards one side in the thickness direction of the elastic sheet 6, such as... Figure 8 , Figure 9 As shown, the root of each flange 63 is rounded to prevent the moving spring from scraping plastic shavings off the push card 9.

[0048] The other end of the push card 9 is provided with a push rib 931 for pushing the rigid moving spring 1 and / or the flexible deformation structure. The push rib 931 is located on the opposite side of the moving contact 3 and extends along the arrangement direction of the multiple moving contacts 3. Thus, the present invention can ensure that the multiple moving contacts 3 on the flexible deformation structure are subjected to balanced forces, achieving synchronous action. The push rib 931 is arranged parallel to the first card slot 92. Specifically, the other end of the push card 9 has a long rod 93 extending outward from the opening of the first card slot 92 on the side of the first card slot 92 near the card hole 91. The side of the long rod 93 facing the moving spring portion has the push rib 931 extending along its length direction. After the push card 9 and the moving spring portion are assembled, the push rib 931 contacts and engages approximately with the middle position of the flexible deformation structure in the width direction. Figure 11 As shown.

[0049] This invention discloses an electromagnetic relay whose U-shaped structure, composed of a rigid moving spring 1, a rigid moving spring lead 2, and a first flexible copper foil 4, enhances its short-circuit current withstand capability and current carrying capacity. Furthermore, the flexible deformation structure at the other end of the rigid moving spring 1 allows for the configuration of single or multiple moving contacts as needed. With multiple moving contacts, the flexible deformation structure ensures effective contact between each moving contact and its corresponding stationary contact. Multiple moving contacts can also achieve parallel connection of multiple sets of contacts, reducing contact temperature rise and achieving high current carrying capacity and low heat generation. The flexible deformation structure also enables contact overtravel, increasing contact pressure and making the contact between the moving and stationary contacts more reliable. Moreover, when a large electrodynamic force is generated between the moving and stationary contacts due to a short-circuit current, even if the rigid moving spring is repelled, the flexible deformation structure at the bottom can still ensure reliable contact through flexible deformation. This is because the flexible deformation structure generates significant deformation in the contact overtravel state, providing greater contact pressure and thus counteracting the electrodynamic repulsion force. Therefore, the present invention can improve the ability to resist electrodynamic repulsion, thereby improving the ability to resist short-circuit current.

[0050] The electromagnetic relay of the present invention, regarding the structure and principle of the connection between the armature part and the push card, please refer to the preceding description, and will not be repeated here.

[0051] The armature part and the push card connection structure and the electromagnetic relay of the present invention, the parts not mentioned (such as the coil assembly that cooperates with the armature part, etc.) are the same as the prior art or can be implemented by the prior art.

[0052] The above embodiments are only used to further illustrate the connection structure between the armature part and the push card and the electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A connection structure between an armature portion and a pusher clip, comprising an armature portion and a pusher clip, characterized in that: The push card is made of thermosetting material, and the armature part is provided with an elastic locking structure. The elastic locking structure deforms under force and passes through the push card without obstruction in the deformed state. After the elastic locking structure is released, it returns to its original state and engages with the push card. The armature portion includes an armature, a plastic component, and a metal component. The armature and the metal component are fixedly connected by the plastic component or injection molded together by an insert, and the armature and the metal component are separated by the plastic component. The metal component is provided with the elastic locking structure.

2. The connection structure between the armature portion and the pusher card according to claim 1, characterized in that: The elastic locking structure includes two locking arms arranged side by side. These two locking arms retract inward relative to each other when subjected to force, and are inserted into the push card in the retracted state. After being released, the two locking arms expand outward relative to each other to engage with the push card. One end of the push card is provided with a locking hole suitable for engaging with the armature part. The locking hole is elongated and extends along the arrangement direction of the two locking arms.

3. The connection structure between the armature portion and the pusher card according to claim 2, characterized in that: Each of the two card arms has a limiting groove on its opposite outer side at the tail end, and the two limiting grooves are respectively engaged with the two ends of the card hole.

4. The armature portion and push-lock connection structure according to claim 2 or 3, characterized in that: The armature portion is provided with a push block located between its two locking arms, and the push block passes through the locking hole.

5. The connection structure between the armature portion and the pusher card according to claim 4, characterized in that: The inner side of the card hole near the other end of the push card is provided with a clearance groove corresponding to the position of the two card arms, so as to avoid the card arms.

6. The connection structure between the armature portion and the pusher card according to claim 1, characterized in that: The armature portion is L-shaped.

7. An electromagnetic relay, comprising a moving spring and a pusher, characterized in that: It also includes a connection structure between the armature portion and the pusher clip as described in any one of claims 1-6, wherein the pusher clip is connected to the moving spring portion.

8. The electromagnetic relay according to claim 7, characterized in that: The push card has a first slot, and the moving spring part has a second slot on one side. The first slot and the second slot engage with each other. The three sides of the second slot are respectively provided with flanges that bend towards one side of the thickness direction of the part where the second slot is located.

9. The electromagnetic relay according to claim 8, characterized in that: The number of moving spring parts is two, and the two moving spring parts are arranged side by side. The number of first slots is two, and the two first slots are arranged back to back.

10. The electromagnetic relay according to claim 8 or 9, characterized in that: The moving spring portion is provided with a plurality of moving contacts arranged in parallel, and the pusher is provided with a pusher rib for pushing the moving spring portion to move. The pusher rib is located on the opposite side of the moving contacts and extends along the arrangement direction of the plurality of moving contacts.

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