Moving spring armature component and clapper type relay

Abstract

The moving spring armature component comprises an armature assembly and a moving spring assembly, the moving spring assembly comprises a plurality of bridge-type conducting strips, a first end and a second end of each bridge-type conducting strip are respectively provided with a moving contact, the moving contacts at the first ends of the plurality of bridge-type conducting strips are connected in parallel, and the moving contacts at the second ends of the plurality of bridge-type conducting strips are connected in parallel. The movable contacts at the second ends of the plurality of bridge type conducting strips are also connected in parallel; the movable spring assembly further comprises at least one elastic piece arranged corresponding to each bridge type conducting piece, and each bridge type conducting piece is connected to the armature assembly through the corresponding elastic piece. The elastic sheets corresponding to the bridge type conducting sheets are mutually independent, so that a plurality of movable contacts forming a parallel connection relation do not interfere with each other in the working process, each movable contact can keep a stable contact state under the action of the corresponding elastic sheet, the contact resistance is kept stable, and the service life of the movable contacts is prolonged. Therefore, the temperature rise characteristic and the electrical service life of the relay are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a moving spring armature component and a snap-action relay. Background Technology

[0002] As the power rating of photovoltaic inverters continues to increase, the operating current that relays need to carry has exceeded the 100-ampere level. Under this high-current condition, the loop impedance of the relay contact system must remain extremely low and highly stable, which places stringent requirements on the contact structure design. Current mainstream solutions employ a parallel structure of multiple bridge contacts to reduce overall impedance through current shunting. However, in this current parallel structure, each moving contact is provided with overtravel and contact pressure by multiple branched plates of the same conductive sheet. This design has the following drawbacks: During load switching, the asynchronous changes in the morphology of each moving contact prevent simultaneous contact. When some moving contacts contact first, the deformation of their corresponding branched plates interferes with the pressure distribution of other branched plates, causing a decrease in contact pressure and an increase in contact resistance for later-contacting moving contacts. This not only leads to localized overheating but also results in unstable overall temperature rise characteristics, ultimately significantly reducing the electrical durability of the relay and severely impacting its reliability in photovoltaic systems. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a moving spring armature component and a snap-action relay, which improves the temperature rise stability of the entire contact system through its structure.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a moving spring armature component, including an armature assembly and a moving spring assembly. The moving spring assembly includes multiple bridge-type conductive plates, each bridge-type conductive plate having a moving contact at its first and second ends. The moving contacts at the first ends of the multiple bridge-type conductive plates are connected in parallel, and the moving contacts at the second ends of the multiple bridge-type conductive plates are also connected in parallel. The moving spring assembly also includes at least one elastic plate corresponding to each bridge-type conductive plate, and each bridge-type conductive plate is connected to the armature assembly through a corresponding elastic plate.

[0005] In a preferred embodiment, the armature assembly includes an armature and an injection molded part fixed together, and the elastic sheet is connected to the injection molded part or a rigid connecting piece disposed on the injection molded part.

[0006] In a preferred embodiment, the elastic sheet and the connecting piece are riveted or welded together; both the elastic sheet and the connecting piece are made of metal.

[0007] In a preferred embodiment, the armature, connecting piece, and injection molded part are integrally molded by insert molding, and the armature and connecting piece are not in contact; the armature component is L-shaped, and the free end of the connecting piece and the free end of the armature correspond to the two ends of the L-shape, respectively.

[0008] In a preferred embodiment, the elastic sheet is located on the side of the corresponding bridge conductive sheet opposite to the moving contact, and the elastic sheet is connected to the first end and / or the second end of the corresponding bridge conductive sheet.

[0009] In a preferred embodiment, the elastic sheet and the first and / or second ends of the corresponding bridge conductive sheet and their moving contacts are synchronously fixed by a co-position riveting process.

[0010] In a preferred embodiment, the first ends of the plurality of bridge conductive sheets are arranged adjacent to each other, and the second ends of the plurality of bridge conductive sheets are arranged adjacent to each other; the moving contacts on each bridge conductive sheet are collinear and coplanar.

[0011] In a preferred embodiment, the plurality of bridge conductive sheets include a first bridge conductive sheet and at least one second bridge conductive sheet. The first bridge conductive sheet is disposed between a first end and a second end of the second bridge conductive sheet, and both the first end and the second end of the second bridge conductive sheet face away from or towards the armature assembly. The first end and the second end of the first bridge conductive sheet are connected to the armature assembly through the same first elastic sheet, and the first end and the second end of the second bridge conductive sheet are respectively connected to the armature assembly through a second elastic sheet.

[0012] In a preferred embodiment, the first elastic sheet has an axisymmetric structure, and the two second elastic sheets on the second bridge conductive sheet are arranged in a mirror-symmetric manner; the first end and the second end of the second bridge conductive sheet both face away from the armature assembly, and the second bridge conductive sheet is provided with a clearance groove corresponding to the first elastic sheet.

[0013] This utility model also provides a snap-action relay, including two sets of stationary spring sections, each set of stationary spring sections including a stationary spring sheet and a plurality of stationary contacts disposed on the stationary spring sheet; it also includes a moving spring armature component as described in this utility model above, wherein the moving contacts at the first end of the plurality of bridge conductive sheets correspond one-to-one with the plurality of stationary contacts of one set of stationary spring sections, and the moving contacts at the second end of the plurality of bridge conductive sheets correspond one-to-one with the plurality of stationary contacts of the other set of stationary spring sections.

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

[0015] 1. Since the moving spring assembly also includes at least one elastic sheet corresponding to each bridge conductive sheet, and each bridge conductive sheet is connected to the armature assembly through a corresponding elastic sheet, the elastic sheet corresponding to each bridge conductive sheet is independent of each other and will not be affected by the changes in the morphology of the moving contact of the other. This ensures that the multiple moving contacts that form a parallel relationship do not interfere with each other during operation. Each moving contact can maintain a stable contact state under the action of its corresponding elastic sheet, so that the contact resistance remains stable. As a result, the temperature rise characteristics and electrical life of the relay are significantly improved, meeting the stringent requirements of photovoltaic systems for high-current relays.

[0016] 2. The elastic sheet is connected to the rigid connecting piece on the injection molded part, so that the elastic sheet and the injection molded part are transferred through the connecting piece. On the one hand, the rigid material of the connecting piece can be used to improve the bonding strength between the connecting piece and the injection molded part. On the other hand, it can reduce the heat generated by the moving spring assembly to be conducted to the injection molded part, thereby improving the performance stability of the injection molded part, delaying the aging and deformation of the injection molded part, and thus contributing to the stability of the mechanical and electrical parameters of the bar relay and improving the life and reliability of the relay.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the moving spring armature component and the snap-action relay of the present invention are not limited to the embodiments. Attached Figure Description

[0018] Figure 1 This is an exploded view of the moving spring armature component of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the connecting piece of this utility model.

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the first elastic sheet of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the second elastic sheet of this utility model;

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the second bridge conductive sheet of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the moving spring armature component of this utility model. Figure 1 ;

[0024] Figure 7 This is a three-dimensional structural diagram of the moving spring armature component of this utility model. Figure 2 ;

[0025] Figure 8 This is a side view of the moving spring armature component of this utility model;

[0026] Figure 9 This is an exploded view of the snap-action relay of this utility model;

[0027] Figure 10 This is a three-dimensional structural diagram of the snap-action relay of this utility model;

[0028] Figure 11 This is a cross-sectional view of the snap-action relay of this utility model;

[0029] Figure 12 This is a schematic diagram showing the cooperation between the moving spring armature component and the two sets of stationary springs of this utility model;

[0030] Figure 13 yes Figure 12 Side view;

[0031] In the diagram, 1. Armature; 11. Drive block; 12. Insulating sleeve; 2. Injection molded part; 3. Connecting piece; 4. First bridge conductive piece; 5. Second bridge conductive piece; 51. Relief groove; 6. Moving contact; 7. First elastic piece; 71. First riveting hole; 72. Second riveting hole; 8. Second elastic piece; 81. Third riveting hole; 82. Fourth riveting hole; 9. Stationary spring part; 91. Stationary spring piece; 92. Stationary contact; 10. Base; 20. Housing; 30. Coil assembly; 301. Coil frame; 302. Coil; 303. Iron core; 304. Yoke; 40. Restoring spring piece; 50. Auxiliary moving spring part; 60. Auxiliary stationary spring part. Detailed Implementation

[0032] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. In the description of this utility model, 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 1-8As shown, this utility model discloses a movable spring armature component, comprising an armature assembly and a movable spring assembly. The movable spring assembly includes multiple bridge-type conductive plates, each of which is rigid. Each bridge-type conductive plate has a movable contact 6 at its first and second ends. The movable contacts 6 at the first and second ends of the multiple bridge-type conductive plates are connected in parallel, and the movable contacts 6 at the second ends of the multiple bridge-type conductive plates are also connected in parallel. The first and second ends of the multiple bridge-type conductive plates are adjacent to each other, and the movable contacts 6 on each bridge-type conductive plate are collinear and coplanar. The movable spring assembly also includes at least one elastic sheet corresponding to each bridge-type conductive plate, and each bridge-type conductive plate is connected to the armature assembly through a corresponding elastic sheet.

[0034] In a preferred embodiment, the armature assembly includes an armature 1, an injection-molded part 2, and a rigid connecting piece 3. The armature 1 and the connecting piece 3 are fixed together by the injection-molded part 2, and the armature 1 and the connecting piece 3 are not in contact. An elastic piece is connected to the connecting piece 3. Specifically, the connecting piece 3 is made of a rigid material, and its thickness is greater than that of the elastic piece. Preferably, both the connecting piece 3 and the elastic piece are made of metal. Specifically, the connecting piece 3 is made of iron, and the elastic piece is made of stainless steel, but it is not limited to this. The elastic piece and the injection-molded part 2 are connected by the connecting piece 3. On the one hand, the rigid material of the connecting piece 3 facilitates positioning, thereby improving the bonding strength between the connecting piece 3 and the injection-molded part 2. On the other hand, it reduces the heat generated by the moving spring assembly from being conducted to the injection-molded part 2, thereby improving the performance stability of the injection-molded part 2, delaying the aging and deformation of the injection-molded part 2, and thus helping to improve the stability of the mechanical and electrical parameters of the relay and improve the life and reliability of the relay. In other embodiments, the armature assembly consists only of an armature and an injection-molded part, omitting the connecting piece. The armature is fixed to the elastic piece by the injection-molded part, preferably using an insert injection molding method. In this embodiment, using a heat-resistant material to manufacture the injection-molded part is a more ideal choice, ensuring its performance in high-temperature environments and further improving overall durability and service life. The armature 1, connecting piece 3, and injection-molded part 2 are integrally molded by insert molding, with the armature 1 and connecting piece 3 partially and completely covered by the injection-molded part 2. Specifically, the armature 1 is roughly L-shaped, with one side fixed to the connecting piece 3 via the injection-molded part 2, and the other side resting on the blade edge of the relay's yoke and magnetically engaging with the relay's core. The entire armature 1 component is L-shaped, with the free end of the connecting piece 3 and the free end of the armature 1 corresponding to the two ends of the L-shape. The connecting piece 3 is constructed as follows... Figure 2 As shown, the portion of the connecting piece 3 encased in the injection molded part 2 has multiple first through holes, which can be used to accommodate molten plastic, thereby increasing the bonding strength between the connecting piece 3 and the injection molded part 2; the portion of the connecting piece 3 outside the injection molded part 2 has multiple second through holes, which can be used to save material and make the connecting piece 3 lighter.

[0035] The aforementioned elastic sheet and connecting piece 3 are mechanically connected by riveting. In an alternative embodiment, riveting can be replaced by welding or other equivalent mechanism fixing methods.

[0036] Each elastic sheet is located on the side of its corresponding bridge conductive sheet opposite to the moving contact 6, and is connected to the first and / or second end of the corresponding bridge conductive sheet. Specifically, each elastic sheet is synchronously fixed to the first and / or second end of its corresponding bridge conductive sheet and the moving contact 6 thereon through a co-position riveting process. This structural design incorporates the elastic sheet into the riveting process between the bridge conductive sheet and the moving contact 6, achieving synchronous fixing of the triple structure. This structural design not only eliminates the need for separate fixing processes for the elastic sheets but also ensures the relative positional accuracy between the elastic sheets, the bridge conductive sheet, and the moving contact 6.

[0037] The aforementioned plurality of bridge conductive plates include a first bridge conductive plate 4 and at least one second bridge conductive plate 5. The first bridge conductive plate 4 is arranged between a first end and a second end of the second bridge conductive plate 5, and both the first end and the second end of the second bridge conductive plate 5 face away from or near the armature assembly. Specifically, the first bridge conductive plate 4 is in the shape of a straight line, and the second bridge conductive plate 5 is generally in the shape of a U, with both ends facing away from the armature assembly. In this embodiment, there are two bridge conductive plates, therefore, there is one second bridge conductive plate 5, but this is not limited to this; in other embodiments, there are two or more second bridge conductive plates 5.

[0038] The first and second ends of the first bridge-type conductive sheet 4 are connected to the armature assembly via the same first elastic sheet 6. The first and second ends of the second bridge-type conductive sheet 5 are each connected to the armature assembly via a second elastic sheet 7. The first elastic sheet 6 is the elastic sheet corresponding to the first bridge-type conductive sheet 4, and the second elastic sheet 7 is the elastic sheet corresponding to the second bridge-type conductive sheet 5. The first elastic sheet 6 has an axisymmetric structure, and its axis of symmetry coincides with the center line of the first bridge-type conductive sheet 4 in the width direction. Specifically, the first elastic sheet 6 is roughly inverted T-shaped, such as... Figure 3As shown, the top of the second bridge conductive sheet 5 has a first riveting hole 61 for riveting and fixing to the connecting piece 3, and the bottom ends have second riveting holes 62 for riveting and fixing to the first and second ends of the first bridge conductive sheet 4, respectively. The two second elastic pieces 7 on the second bridge conductive sheet 5 are arranged in a mirror-symmetrical manner, and the axis of symmetry coincides with the center line of the second bridge conductive sheet 5 in the width direction of the main body. The first bridge conductive sheet 4 and the second bridge conductive sheet 5 are also axisymmetric structures, each with its center line in the width direction as its axis of symmetry. Each second elastic piece 7 has a third riveting hole 71 at the top and a fourth riveting hole 72 at the bottom. The third riveting hole 71 is used for riveting and fixing to the connecting piece 3, and the fourth riveting hole 72 is used for riveting and fixing to the first or second end of the second bridge conductive sheet 5.

[0039] The second bridge-type conductive sheet 5 is provided with a relief groove 51 corresponding to the first elastic sheet 6, such as Figure 5 As shown. In this way, the clearance groove 51 can be used to avoid interference from the second bridge conductive sheet 5 when the first elastic sheet 6 drives the first bridge conductive sheet 4 to move in the contact closing direction.

[0040] This utility model discloses a moving spring armature component, whose moving spring assembly can cooperate with multiple sets of stationary springs in a relay to form a parallel structure of multiple bridge contacts. This significantly improves the current-carrying capacity, enabling the relay to meet the application requirements of high current. The elastic plates connected to each bridge conductive plate are independent and unaffected by changes in the morphology of the other moving contact 6. This ensures that the multiple moving contacts 6 forming a parallel relationship do not interfere with each other during operation. Each moving contact 6 maintains a stable contact state with the stationary contact under the action of its corresponding elastic plate, keeping the contact resistance stable. This significantly improves the relay's temperature rise characteristics and electrical life, meeting the stringent requirements of photovoltaic systems for high-current relays.

[0041] Please see Figures 10-13 As shown, a snap-action relay of this utility model includes two sets of stationary spring parts 9. Each set of stationary spring parts 9 includes a rigid stationary spring plate 91 and a plurality of stationary contacts 92 disposed on the stationary spring plate 91. It also includes a moving spring armature component as described above. The moving contacts 6 at the first end of the plurality of bridge conductive plates correspond one-to-one with the plurality of stationary contacts 92 of one set of stationary spring parts 9, and the moving contacts 6 at the second end of the plurality of bridge conductive plates correspond one-to-one with the plurality of stationary contacts 92 of the other set of stationary spring parts 9.

[0042] This utility model also includes a base 10 and a coil assembly 30. The coil assembly 30 includes a coil frame 301, a coil 302 wound on the coil frame 301, an iron core 303, and a yoke 304. The coil frame 301 is erected on the base 10. The iron core 303 is inserted into the shaft hole in the middle of the coil frame 301. The yoke 304 is L-shaped, with one side connected to the bottom end of the iron core 303 and the other side located outside the coil frame 301. The armature 1 of the upper armature assembly is movably disposed at the knife edge on the other side of the yoke 304 and engages with the pole face at the top of the iron core 303. A return spring 40 is provided between the armature 1 and the other side of the yoke 304 to provide the armature 1 with a reset. The return springs 91 of the two sets of stationary spring parts 9 are inserted side by side into the base 10.

[0043] This utility model also includes an auxiliary contact assembly, which specifically includes an auxiliary moving spring portion 50 and an auxiliary stationary spring portion 60 that cooperate with each other. The auxiliary moving spring portion 50 and the auxiliary stationary spring portion 60 are respectively mounted on the coil frame 301. The free end of the armature 1 is provided with a driving block 11, which is covered with an insulating sleeve 12 for driving the auxiliary moving spring portion 50 to move.

[0044] The present invention also includes a housing 20, which has an opening at the bottom end. The bottom end of the housing 20 is connected to the base 10, and the moving spring armature component, the coil assembly 30, the two sets of stationary springs 9, and the auxiliary contact assembly are enclosed in its housing cavity.

[0045] The aforementioned multiple bridge-type conductive sheets specifically include a first bridge-type conductive sheet 4 and a second bridge-type conductive sheet 5. Therefore, the moving spring assembly has a total of four moving contacts 6. Correspondingly, each stationary spring part 9 is provided with two stationary contacts 92. The two sets of stationary spring parts 9 together have four stationary contacts 92. The four moving contacts 6 and the four stationary contacts 92 form two sets of bridge-type contact parallel structures, such as... Figure 12 , Figure 13 As shown.

[0046] The present invention relates to a moving spring armature component and a snap-action relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0047] The above embodiments are only used to further illustrate a moving spring armature component and a snap-action 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 movable spring armature component, comprising an armature assembly and a movable spring assembly, the movable spring assembly comprising a plurality of bridge-type conductive plates, each bridge-type conductive plate having a movable contact at its first and second ends, the movable contacts at the first ends of the plurality of bridge-type conductive plates being connected in parallel, and the movable contacts at the second ends of the plurality of bridge-type conductive plates also being connected in parallel; characterized in that: The moving spring assembly also includes at least one elastic sheet corresponding to each bridge conductive sheet, and each bridge conductive sheet is connected to the armature assembly through a corresponding elastic sheet.

2. The movable spring armature component according to claim 1, characterized in that: The armature assembly includes an armature and an injection molded part fixed together, and the elastic sheet is connected to the injection molded part or a rigid connecting piece provided on the injection molded part.

3. The movable spring armature component according to claim 2, characterized in that: The elastic sheet is riveted or welded to the connecting piece; both the elastic sheet and the connecting piece are made of metal.

4. The movable spring armature component according to claim 2, characterized in that: The armature, connecting piece, and injection molded part are integrally molded by insert molding, and the armature and connecting piece are not in contact; the armature component is L-shaped, and the free end of the connecting piece and the free end of the armature correspond to the two ends of the L-shape respectively.

5. The movable spring armature component according to claim 1, characterized in that: The elastic sheet is located on the side of the corresponding bridge conductive sheet opposite to the moving contact, and the elastic sheet is connected to the first end and / or the second end of the corresponding bridge conductive sheet.

6. The movable spring armature component according to claim 5, characterized in that: The elastic sheet and the first and / or second ends of the corresponding bridge conductive sheet and their moving contacts are synchronously fixed through a co-position riveting process.

7. The movable spring armature component according to claim 1, characterized in that: The first ends of the plurality of bridge conductive sheets are arranged adjacent to each other, and the second ends of the plurality of bridge conductive sheets are arranged adjacent to each other; the moving contacts on each bridge conductive sheet are collinear and coplanar.

8. The movable spring armature component according to any one of claims 1-7, characterized in that: The plurality of bridge conductive plates include a first bridge conductive plate and at least one second bridge conductive plate. The first bridge conductive plate is arranged between a first end and a second end of the second bridge conductive plate, and both the first end and the second end of the second bridge conductive plate face away from or towards the armature assembly. The first end and the second end of the first bridge conductive plate are connected to the armature assembly through the same first elastic plate, and the first end and the second end of the second bridge conductive plate are respectively connected to the armature assembly through a second elastic plate.

9. The movable spring armature component according to claim 8, characterized in that: The first elastic sheet has an axisymmetric structure, and the two second elastic sheets on the second bridge conductive sheet are arranged in a mirror symmetrical manner; the first end and the second end of the second bridge conductive sheet both face away from the armature assembly, and the second bridge conductive sheet is provided with a clearance groove corresponding to the first elastic sheet.

10. A snap-action relay, comprising two sets of stationary spring sections, each set of stationary spring sections comprising a stationary spring plate and a plurality of stationary contacts disposed on the stationary spring plate; characterized in that: It also includes a moving spring armature component as described in any one of claims 1-9, wherein the moving contacts at the first end of the plurality of bridge conductive plates correspond one-to-one with the plurality of stationary contacts of one set of stationary spring portions, and the moving contacts at the second end of the plurality of bridge conductive plates correspond one-to-one with the plurality of stationary contacts of another set of stationary spring portions.

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