Relay yoke and armature connection structure and magnetic circuit system and electromagnetic relay

Abstract

The present invention discloses a relay yoke and armature connection structure, a magnetic circuit system, and an electromagnetic relay. The connection structure includes a yoke and an armature, wherein the yoke is L-shaped. The first side of the yoke is connected to the armature using a restoring spring. The armature is opposite the second side of the yoke, and the first side of the yoke is located between the second side of the yoke and the armature, with a first spacing between the first side of the yoke and the armature. A magnetic member is provided on the inner surface of the first side of the yoke. The armature has a first state in contact with the magnetic member and a second state in separation from the magnetic member. In the second state, the armature has a second spacing between the armature and the magnetic member, which is smaller than the first spacing. The present invention keeps the armature and yoke separated, solving the problem of relay jamming or abnormal contact due to yoke edge wear.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a yoke and armature connection structure of a relay, a magnetic circuit system, and an electromagnetic relay. Background Art

[0002] Electromagnetic relays in the prior art typically include a base, a magnetic circuit system, and a contact system. The magnetic circuit system includes a coil assembly, an armature, and a yoke. The yoke is L-shaped, and the armature is typically hung directly on the edge of one side of the yoke, so that the armature and the yoke are always in contact, and typically in point contact. This causes the yoke edge to wear at the end of the relay's durability, causing the relay to jam or the contacts to become abnormal due to dust generated by the yoke wear, ultimately leading to premature failure of the relay. Summary of the Invention

[0003] The present invention aims to solve the technical problems in the prior art and provides a yoke and armature connection structure of a relay, a magnetic circuit system and an electromagnetic relay, wherein the yoke and the armature are designed to be separated to avoid wear of the yoke.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a yoke and armature connection structure of a relay, including a yoke and an armature, the yoke is L-shaped; the first side of the yoke is connected to the armature by a restoring spring, the armature is opposite to the second side of the yoke, the first side of the yoke is located between the second side of the yoke and the armature, and there is a first distance between the first side of the yoke and the armature; a magnetic conductive part is provided on the inner surface of the first side of the yoke, the armature has a first state in contact with the magnetic conductive part and a second state separated from the magnetic conductive part, the armature has a second distance between the magnetic conductive part and the second state, and the second distance is smaller than the first distance.

[0005] Furthermore, the magnetic conductive member is integrally formed with the yoke, or the magnetic conductive member is connected to the inner surface of the first side of the yoke, and the size of the second distance is adjustable.

[0006] Furthermore, a connecting hole is provided on the first side of the yoke, and the magnetic conductive member is connected to the first side of the yoke by a fastener passing through the connecting hole, and the fastener can move relative to the connecting hole toward or away from the armature.

[0007] Furthermore, the connecting hole is an elongated hole and extends along the direction of the second side of the armature and the yoke. The fastener is a screw that is threadedly connected to the magnetic conductive part, or the fastener is a rivet that is riveted to the magnetic conductive part.

[0008] Furthermore, the restoring spring includes a first side, a second side and a bent portion arranged between the first side and the second side, the first side of the restoring spring is connected to the outer surface of the first side of the yoke, and the second side of the restoring spring is connected to the side of the armature facing away from the yoke.

[0009] Furthermore, the bent portion of the restoring spring is rounded and provided with a hollow opening; and the restoring spring is L-shaped.

[0010] Furthermore, it also includes a push card, which is injection-molded together with the armature insert; a buffer portion is provided on the side of the push card facing away from the second side of the yoke.

[0011] Furthermore, the armature and the magnetic conductive member are in surface contact or line contact in the contact state; and the magnetic conductive member is in sheet shape.

[0012] The present invention further provides a magnetic circuit system of a relay, comprising a coil assembly, the coil assembly comprising a coil frame, an enameled wire wound on the coil frame, and an iron core inserted into the coil frame; and further comprising a yoke and armature connection structure of the relay as described in the present invention above, wherein the second side of the yoke is connected to or integrally formed with one end of the iron core, and the armature is attracted or separated from the other end of the iron core.

[0013] Furthermore, the coil frame and the end surface corresponding to the other end of the iron core are provided with a plurality of deformable protrusions distributed circumferentially, and the outer periphery of the other end of the iron core is provided with a circle of bosses, which fully or partially cover the protrusions and squeeze the protrusions; the protrusions are small ribs and extend along the radial direction of the iron core.

[0014] Furthermore, a reaction spring is provided between the armature and the coil frame.

[0015] The present invention further provides an electromagnetic relay, comprising a base, a contact system, and a magnetic circuit system of the relay as described above in the present invention, wherein the magnetic circuit system is arranged on the base, the static spring part of the contact system is arranged on the base, and the dynamic spring part of the contact system is arranged on the magnetic circuit system or the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Because the first side of the yoke is connected to the armature by a restoring spring, and a first spacing is provided between the armature and the first side of the yoke, the armature and the yoke remain separated, preventing wear and tear caused by contact between the armature and the yoke during operation. This solves the problem of relay jamming or contact abnormality caused by wear on the yoke blade. The provision of the magnetic conductive member ensures that a closed magnetic circuit is formed when the armature is attracted and the armature and yoke are separated, ensuring reliable operation of the relay. Furthermore, the first spacing can be designed to be larger, thereby ensuring the long-term operation of the restoring spring and preventing it from breaking.

[0018] 2. The second gap is adjustable, allowing the magnetic circuit drop of the relay's magnetic circuit system to be adjusted based on the relative position of the magnetic permeable member and the armature, thereby adjusting the product's overtravel and electrical parameters. Specifically, the magnetic permeable member is connected to the first side of the yoke using a fastener that passes through the connection hole. The fastener can move relative to the connection hole toward or away from the armature, making the second gap adjustment very convenient and precise.

[0019] 3. The armature and the magnetic member are in surface or line contact, significantly reducing wear on the magnetic member. Specifically, the armature contacts the magnetic member only in the first state, minimizing wear on the magnetic member and ensuring the long-term operation of the magnetic member.

[0020] 4. The setting of the buffer part can effectively alleviate the impact force of the armature part on the contact system of the relay under strong impact and vibration conditions, especially for relays with large armature parts, which can effectively avoid deformation of the contact system caused by impact and cause relay failure.

[0021] 5. The protrusions and bosses adjust the position of the core's pole face, thereby adjusting the distance between the core's pole face and the armature, preventing shrinkage and deformation of the coil bobbin's end face, which could result in a misaligned fit between the core and the armature. Furthermore, the protrusions enhance the strength of the corresponding end face of the coil bobbin.

[0022] 6. The setting of the reaction spring can supplement the reaction force of the small loss caused by the deformation of the restoring spring.

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments; however, the yoke and armature connection structure of a relay, the magnetic circuit system, and the electromagnetic relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the yoke and armature connection structure of the present invention;

[0025] Figure 2is a side view of the yoke and armature connection structure of the present invention;

[0026] Figure 3 Schematic diagram of the coordination of the yoke and the magnetic conductive member of the present invention;

[0027] Figure 4 2 is a schematic diagram of the three-dimensional structure of the restoration reed of the present invention;

[0028] Figure 5 is a side view of the recovery reed of the present invention;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the magnetic circuit system of the present invention;

[0030] Figure 7 is a front view of the magnetic circuit system of the present invention;

[0031] Figure 8 yes Figure 7 AA section view;

[0032] Figure 9 yes Figure 8 An enlarged schematic diagram of part B;

[0033] Figure 10 It is a schematic diagram of the three-dimensional structure of the coil portion of the present invention. DETAILED DESCRIPTION

[0034] In the present invention, the terms "first," "second," etc. are used only to distinguish similar objects, and are not necessarily used to describe a specific order or precedence, nor should they be understood to indicate or imply relative importance. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] See Figure 1-Figure 5As shown, a yoke and armature connection structure for a relay according to the present invention includes a yoke 1, an armature 2, and a restoring spring 3. The yoke 1 is L-shaped, and the first side of the yoke 1 is connected to the armature 2 via the restoring spring 3. The armature 2 is opposite the second side of the yoke 1. The first side of the yoke 1 is located between the second side of the yoke and the armature 2, and a first spacing is provided between the first side of the yoke 1 and the armature 2. The restoring spring has a first side, a second side, and a bent portion disposed between the first and second sides. Specifically, the restoring spring 3 is generally L-shaped, with the first side of the restoring spring 3 connected to the outer surface of the first side of the yoke 1, and the second side of the restoring spring 3 connected to the side of the armature 2 facing away from the yoke 1. A magnetic conductive member 4 is disposed on the inner surface of the first side of the yoke 1. The magnetic conductive member 4 protrudes from the end of the first side of the yoke 1 toward the armature 2, forming a step between the magnetic conductive member 4 and the first side of the yoke 1. The armature 2 has a first state in contact with the magnetic member 4 and a second state in separation from the magnetic member 4. In the second state, the armature 2 has a second spacing from the magnetic member 4 that is smaller than the first spacing. When the present invention is applied to a relay magnetic circuit system, the armature and the core of the magnetic circuit system have an engaged state and a disengaged state. The first state is the engaged state of the armature, and the second state is the disengaged state of the armature, also known as the restored state of the armature. The first and second sides of the yoke 1 correspond to the two sides of the L-shape, respectively.

[0036] In this embodiment, the magnetic member 4 is connected to the inner surface of the first side of the yoke 1, and the second spacing is adjustable. The magnetic member 4 can be made of the same material as the yoke 1 and be in a sheet-like shape, but is not limited thereto. In other embodiments, the magnetic member is integrally formed with the yoke.

[0037] In this embodiment, the first side of the yoke 1 is provided with a connecting hole, and the magnetic conductive member 4 is connected to the first side of the yoke 1 by a fastener passing through the connecting hole 11. The fastener can move toward or away from the armature 2 relative to the connecting hole 11 (i.e. Figure 1 The connecting hole 11 is specifically a long hole, specifically a waist-shaped hole, which is along the direction of the second side of the armature 2 and the yoke 1 (i.e. Figure 1 The fastener is a screw 5, which is threadedly connected to the magnetic member 4. In other embodiments, the fastener is a rivet, which is riveted to the magnetic member. The number of the fasteners (i.e., screws 4) is two, but not limited to this. The two screws 4 are arranged along the width direction of the armature 2 (i.e., Figure 1 (X-axis direction) arrangement settings.

[0038] In this embodiment, the restoring spring 3 is connected to the outer surface of the first side of the yoke 1 using the fastener (i.e., screw 4). Specifically, the screw passes through the first side of the restoring spring 3 and the first side of the yoke 1, and then is threadedly connected to the threaded hole in the magnetic conductive member 4. The bend between the two sides of the restoring spring 3 (i.e., the first and second sides of the restoring spring 3) is rounded, and the bend between the two sides of the restoring spring 3 is provided with a hollow opening 31. The hollow opening 31 not only saves material but also improves the elasticity of the two sides of the restoring spring 3, thereby increasing the reaction force of the restoring spring 3. The second side of the restoring spring 3 is riveted to the armature 2.

[0039] In this embodiment, the present invention also includes a push card 6, which is insert-molded with the armature 2. A buffer portion 61 is provided on the side of the push card 6 facing away from the second side of the yoke 1. The push card 6 is shown only partially in the figure and can be used to secure the dynamic spring portion of the electromagnetic relay. The provision of the buffer portion 61 effectively mitigates the impact force of the armature 2 on the relay's contact system under strong shock and vibration conditions. This is particularly effective for relays with larger armatures, as it effectively prevents contact system deformation caused by shock and can lead to relay failure.

[0040] In this embodiment, the armature 2 and the magnetic conductive member 4 are in surface contact in the contact state, but it is not limited thereto. In other embodiments, the armature and the magnetic conductive member are in line contact in the contact state.

[0041] In this embodiment, at least one notch 12 is provided at the end of the second side of the yoke 1, thereby configuring the second end of the yoke 1 as a plurality of pins that can be plugged into the base of the relay to secure the magnetic circuit system. The sides of the notch 12 are provided with a plurality of retaining ribs 121 to ensure a more secure and stable insertion of the pins.

[0042] The present invention provides a relay yoke and armature connection structure in which the armature 2 and yoke 1 are separated. This prevents wear and tear caused by contact between the armature 2 and the yoke 1 during operation, thereby resolving relay jamming and contact abnormalities caused by yoke edge wear. The provision of the magnetic conductive member 4 ensures that a closed magnetic circuit is formed when the armature 2 is engaged and the armature 2 and yoke 1 are separated, ensuring reliable relay operation. Furthermore, the provision of the first spacing is increased, thereby allowing for a larger angle at the bend between the two sides of the restoring spring 3, thereby ensuring the long-term operation of the restoring spring 3 and preventing breakage. In addition, the armature 2 is also separated from the magnetic member 4 in the second state, so that when the armature 2 moves, it will not immediately rotate with the magnetic member as a fulcrum, thereby reducing the wear on the magnetic member; the armature and the magnetic member are in surface contact or line contact in the contact state, rather than point contact, which can further reduce the wear of the armature on the magnetic member; when the armature and the magnetic member are in contact, the weight of the entire armature and the contact system of the electromagnetic relay is borne by the restoring spring, and the magnetic member does not bear the weight, which can further reduce the wear on the magnetic member, thereby ensuring that the magnetic member can work durably.

[0043] The second spacing is adjustable, allowing the magnetic circuit drop of the relay's magnetic circuit system to be adjusted based on the relative position of the magnetic element 4 and the armature 2, thereby adjusting the product's overtravel and electrical parameters. The magnetic circuit drop is the distance between the surface of the magnetic element 4 that contacts the armature 2 and the end of the magnetic core that connects to the second side of the yoke 1. Specifically, the second spacing can be adjusted by adjusting the fit of the magnetic element with the waist-shaped connection hole, allowing the product's electrical and mechanical parameters to be adjusted before completion.

[0044] See Figures 6-10 As shown, a magnetic circuit system of a relay of the present invention includes a coil assembly, which includes a coil frame 7, an enameled wire 8 wound on the coil frame 7, and an iron core 9 inserted into the coil frame 7; and also includes a yoke and armature connection structure of the relay as described in the present invention above, wherein the second side of the yoke 1 is connected to or integrally formed with one end of the iron core 9, and the armature 2 is fitted at the other end of the iron core 9 to attract or separate from the other end of the iron core 9.

[0045] In this embodiment, the coil frame 7 is provided with a plurality of circumferentially distributed deformable protrusions on the end surface corresponding to the other end of the core 9. A ring of bosses 91 is provided on the outer periphery of the other end of the core 9. The bosses 91 fully or partially cover and compress the protrusions. The protrusions are small ribs 71 extending radially along the core 9, with the bosses 91 completely covering the small ribs 71. The second side of the yoke 1 and one end of the core 9 can be secured by riveting or screwing. When screwing, the screw passes through a through hole provided in the second side of the yoke 1 and is threadedly engaged with a threaded hole provided at one end of the core 9. During the connection between the second side of the yoke 1 and one end of the core 9, the deformation of each small rib 71 can be controlled by controlling the riveting distance or the degree of threaded engagement between the screw and the threaded hole in the core, thereby adjusting the spacing between the pole face of the core 9 and the armature 2 and preventing shrinkage and deformation of the end face of the coil frame 7 from causing the core 9 and the armature 2 to not fit properly. The provision of the convex portion (ie, the small rib 71 ) can also improve the strength of the corresponding end surface of the coil frame 7 .

[0046] In this embodiment, a reaction spring 10 is interposed between the armature 2 and the coil frame 7 to supplement the reaction force lost by the deformation of the restoring spring. Specifically, but not limited to, two reaction springs 10 are provided. These two reaction springs 10 are distributed along the width of the armature 2. One end of each reaction spring 10 is connected to the end of the armature 2 distal from the magnetic conductor 4. The other end of each reaction spring 10 is inserted into a groove 72 provided on the end surface of the coil frame 7 opposite the armature 2. A positioning post 73 for the reaction spring 10 is located at the center of the groove 72.

[0047] The magnetic circuit system of a relay of the present invention adopts the yoke and armature connection structure of the above-mentioned relay, which not only has high magnetic conductivity efficiency but also realizes structural flexibility, so that the working air gap and magnetic circuit drop of the magnetic circuit system can be changed by adjusting the relative positions of the parts, thereby realizing the adjustment of the product's operating voltage and release voltage, thereby solving the problem of the relay magnetic circuit system in the prior art having small adjustment space or no adjustment space, resulting in poor product correctability.

[0048] An electromagnetic relay of the present invention includes a base, a contact system, and also includes a magnetic circuit system of the relay described in the present invention. The magnetic circuit system is arranged on the base, the static spring part of the contact system is arranged on the base, and the dynamic spring part of the contact system is arranged on the magnetic circuit system or the base.

[0049] In this embodiment, the coil frame 7 of the magnetic circuit system is horizontal, but the present invention is not limited thereto. The movable spring of the movable spring portion of the contact system is insert-molded with the plastic component, and then insert-molded with the push card 6 again, so that the armature 2, push card 6, plastic component, and movable spring are integrated together.

[0050] In an electromagnetic relay according to the present invention, when a certain excitation is applied to the magnetic circuit system, the armature 2 is attracted by the iron core 9, causing the armature 2 to swing toward the iron core 9. The armature 2 first contacts the magnetic conductive member 4 and then engages with the pole face at the other end of the iron core 9 (alternatively, the armature 2 may contact the magnetic conductive member 4 and the iron core 9 simultaneously). Simultaneously, the armature 2 drives the movable spring by pushing the latch 6 and the plastic member, causing the movable spring to deform and causing the movable contact on the movable spring to engage with the static contact on the static spring portion. When the magnetic circuit system is de-energized, the armature 2 is released from the iron core 9. Under the restoring force of the return spring 3 and the reaction spring 10, the armature 2 swings away from the iron core 9 until it returns to its initial state. Simultaneously, the movable spring returns to its original position, disconnecting the movable contact from the static contact.

[0051] The yoke and armature connection structure, magnetic circuit system and electromagnetic relay of the relay of the present invention are the same as those in the prior art or can be implemented by using the prior art.

[0052] The above embodiments are only used to further illustrate the yoke and armature connection structure, magnetic circuit system and electromagnetic relay of a relay of the present invention, but the present invention 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 present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. A yoke and armature connection structure of a relay, comprising a yoke and an armature, wherein the yoke is L-shaped; characterized in that: The first side of the yoke is connected to the armature by a restoring spring, the armature is opposite to the second side of the yoke, the first side of the yoke is located between the second side of the yoke and the armature, and there is a first distance between the first side of the yoke and the armature; a magnetic component is provided on the inner surface of the first side of the yoke, the armature has a first state in contact with the magnetic component and a second state separated from the magnetic component, the armature has a second distance between the magnetic component and the second state, and the second distance is smaller than the first distance.

2. The yoke and armature connection structure of a relay according to claim 1, characterized in that: The magnetic conductive member is integrally formed with the yoke, or the magnetic conductive member is connected to the inner surface of the first side of the yoke, and the size of the second distance is adjustable.

3. The yoke and armature connection structure of a relay according to claim 2, characterized in that: A connecting hole is provided on the first side of the yoke, and the magnetic conductive member is connected to the first side of the yoke by a fastener passing through the connecting hole. The fastener can move relative to the connecting hole toward or away from the armature.

4. The yoke and armature connection structure of a relay according to claim 3, characterized in that: The connecting hole is a long hole and extends along the direction of the second side of the armature and the yoke. The fastener is a screw that is threadedly connected to the magnetic conductive part, or the fastener is a rivet that is riveted to the magnetic conductive part.

5. The yoke and armature connection structure of a relay according to any one of claims 1 to 4, characterized in that: The restoring spring includes a first side, a second side and a bent portion arranged between the first side and the second side. The first side of the restoring spring is connected to the outer surface of the first side of the yoke, and the second side of the restoring spring is connected to the side of the armature facing away from the yoke.

6. The yoke and armature connection structure of a relay according to claim 5, characterized in that: The bent portion of the restoring spring is in a rounded state and is provided with a hollow opening; the restoring spring is in an L-shape.

7. The yoke and armature connection structure of a relay according to claim 1, wherein: It also includes a push card, which is injection-molded together with the armature insert; a buffer portion is provided on a side of the push card facing away from the second side of the yoke.

8. The yoke and armature connection structure of a relay according to any one of claims 1 to 4, characterized in that: The armature and the magnetic conductive member are in surface contact or line contact in a contact state; the magnetic conductive member is in sheet shape.

9. A magnetic circuit system for a relay, comprising a coil assembly, the coil assembly comprising a coil frame, an enameled wire wound around the coil frame, and an iron core inserted through the coil frame; characterized in that: It also includes a yoke and armature connection structure of a relay as described in any one of claims 1 to 8, wherein the second side of the yoke is connected to or integrally formed with one end of the iron core, and the armature is attracted or separated from the other end of the iron core.

10. The magnetic circuit system of the relay according to claim 9, characterized in that: A plurality of deformable protrusions distributed circumferentially are provided on the end surface of the coil frame corresponding to the other end of the iron core, and a circle of bosses is provided on the outer periphery of the other end of the iron core, which fully or partially covers the protrusions and squeezes the protrusions; the protrusions are small ribs and extend along the radial direction of the iron core.

11. The magnetic circuit system of a relay according to claim 9, characterized in that: A reaction spring is provided between the armature and the coil frame.

12. An electromagnetic relay comprising a base and a contact system, characterized in that: It also includes a magnetic circuit system of the relay according to any one of claims 9 to 11, wherein the magnetic circuit system is arranged on the base, the static spring part of the contact system is arranged on the base, and the dynamic spring part of the contact system is arranged on the magnetic circuit system or the base.

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