A contact system and relay with anti-sticking function of contact

Abstract

The application discloses a contact system and relay with anti-sticking function, which comprises a static spring part and a dynamic spring part; the dynamic spring part comprises a dynamic spring sheet and a dynamic contact, the dynamic contact is connected to one end of the dynamic spring sheet; the static spring part is provided with a static spring sheet; characterized in that: a bending part is arranged between two ends of the dynamic spring sheet, the bending part has an included angle with the length direction of the static spring sheet to generate an inclined electric repulsion force when a short-circuit current passes, the electric repulsion force has a parallel component with the length direction of the static spring sheet to act on the dynamic contact to realize anti-sticking. The application can effectively avoid the sticking or explosion of the dynamic spring part caused by the rebound of the dynamic spring part due to the short-circuit current.

Description

Technical Field

[0001] This invention relates to the field of relays, and in particular to a contact system and relay with anti-sticking function. Background Technology

[0002] Electromagnetic relays, as electromechanical components, are widely used in power control, industrial automation devices, and household appliances. Existing relays generally consist of a contact system, a magnetic circuit system, a drive mechanism, and a base. The magnetic circuit system typically includes components such as an iron core, yoke, armature, and coil. The contact system includes a moving spring and a stationary spring, and the drive mechanism generally includes a drive clip. When the relay coil is energized, the magnetic circuit system operates, and the drive clip actuates the moving spring, causing the moving contact to open or close.

[0003] In existing contact systems, the moving spring 1 and the stationary spring 2 are arranged in parallel. Furthermore, to increase the flexibility of the moving spring 1, a bend 3 is typically formed on the moving spring 1 towards the stationary spring portion. (See [reference]). Figure 1 , Figure 2 In this structure, when a short-circuit current is present, according to the principle of attraction between like directions and repulsion between unlike directions, the very large short-circuit current causes the moving contact to spring open, resulting in arcing, generating heat that leads to fusion welding. The moving spring part can easily be springed open, leading to adhesion or even explosion. Furthermore, the lever arm of the bent part is short, making it difficult to deform, which is not conducive to contact breakage. Summary of the Invention

[0004] The main objective of this invention is to overcome the aforementioned defects in existing contact systems and to propose a contact system and relay with anti-sticking function. The bending part is designed with an inclined elongation, which can improve the deformation flexibility of the moving spring. In the case of short-circuit current, an inclined electric repulsive force is generated, which can act on the moving contact to achieve anti-sticking.

[0005] The present invention adopts the following technical solution:

[0006] A contact system with anti-sticking function includes a stationary spring part and a movable spring part; the movable spring part includes a movable spring sheet and a movable contact, the movable contact being connected to one end of the movable spring sheet; the stationary spring part is provided with a stationary spring sheet; characterized in that: a bent portion is provided between the two ends of the movable spring sheet, the bent portion forming an angle with the length direction of the stationary spring sheet to generate an inclined electro-repulsive force when a short-circuit current passes through, the electro-repulsive force having a component force parallel to the length direction of the stationary spring sheet to act on the movable contact to achieve anti-sticking.

[0007] Preferably, the bending portion includes a first inclined section, a second inclined section, and a connecting section; the first inclined section is bent from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly towards the moving contact along the length direction of the stationary spring and connects to one end of the connecting section; the second inclined section is bent from the other end of the moving spring in a direction away from the stationary spring, and extends inclinedly towards the moving contact along the length direction of the stationary spring and connects to the other end of the connecting section.

[0008] Preferably, the first inclined segment and the second inclined segment are parallel or not parallel. When a short-circuit current passes through, the first inclined segment and / or the second inclined segment generate the electric repulsive force. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking. The component of the electric repulsive force perpendicular to the length direction of the stationary spring acts on the moving contact to resist the moving contact from springing away.

[0009] Preferably, the bending portion includes a first inclined section, a second inclined section, and a connecting section; the first inclined section is bent from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly along the length direction of the stationary spring away from the moving contact and connects to one end of the connecting section; the second inclined section is bent from the other end of the moving spring in a direction away from the stationary spring, and extends inclinedly along the length direction of the stationary spring away from the moving contact and connects to the other end of the connecting section.

[0010] Preferably, the first inclined segment and the second inclined segment are parallel or not parallel. When a short-circuit current passes through, the first inclined segment and / or the second inclined segment generate the inclined electric repulsive force. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking.

[0011] Preferably, the angle between the first inclined segment and the length direction of the stationary spring is greater than or equal to 45° and less than 90°.

[0012] Preferably, the bending portion includes an inclined section and a horizontal section; the inclined section is bent from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly away from the moving contact along the length direction of the stationary spring; the horizontal section is bent from the other end of the moving spring in a direction away from the stationary spring, and then extends perpendicularly to the length direction of the stationary spring and connects to the corresponding end of the inclined section;

[0013] Preferably, the inclined segment and the horizontal segment have an angle, and the inclined segment and / or the horizontal segment generate the inclined electric repulsive force when a short-circuit current passes through. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking.

[0014] Preferably, the bending portion includes an inclined section and a horizontal section; the inclined section is bent from one end near the moving spring towards the stationary spring, and extends obliquely away from the moving contact along the length direction of the stationary spring to the side of the stationary spring opposite to the moving spring; the horizontal section is bent from the other end of the moving spring towards the stationary spring and extends in a direction perpendicular to the length direction of the stationary spring and connects to the corresponding end of the inclined section; the bending portion is provided with a notch to accommodate the stationary spring.

[0015] Preferably, the bending portion includes an inclined section and a horizontal section; the inclined section is bent from one end near the moving spring towards the stationary spring, and extends inclinedly away from the moving contact along the length direction of the stationary spring; the horizontal section is bent from the other end of the moving spring towards the stationary spring and extends in a direction perpendicular to the length direction of the stationary spring and connects to the corresponding end of the inclined section.

[0016] Preferably, the inclined segment and the horizontal segment have an angle, and the inclined segment and / or the horizontal segment generate the inclined electric repulsive force when a short-circuit current passes through. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking, and the component of the electric repulsive force perpendicular to the length direction of the stationary spring acts on the moving contact to resist the moving contact from springing away.

[0017] Preferably, the angle between the inclined segment and the horizontal segment is greater than 0° and less than 90°.

[0018] A relay with anti-contact adhesion function is characterized in that: it is equipped with a contact system with anti-contact adhesion function.

[0019] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In this invention, the moving spring is provided with a bent portion that forms an angle with the length direction of the stationary spring, so as to generate an inclined electric repulsive force when a short-circuit current passes through. The electric repulsive force has a component force parallel to the length direction of the stationary spring to act on the moving contact to achieve anti-sticking, effectively avoiding the moving spring part from sticking or even exploding due to being bounced away by the short-circuit current.

[0021] 2. In this invention, the bending portion includes a first inclined section, a second inclined section, and a connecting section. The first and second inclined sections are bent away from the stationary spring and extend inclinedly along the length of the stationary spring. They are connected by the connecting section. The inclined and elongated design improves the deformation flexibility of the bending portion. According to the Lorentz magnetic principle of attraction in the same direction and repulsion in opposite directions, the first and second inclined sections can generate an inclined electric repulsive force when a short-circuit current passes through. The component of the inclined electric repulsive force in the length direction of the stationary spring acts on the moving contact to prevent sticking or to tear apart the contacts welded together by the short-circuit current, making it easier to separate the contacts. The repulsive force generated by the bending portion inclined towards the moving contact can also act on the moving contact in the direction perpendicular to the length of the moving spring lead-out to resist the moving contact from springing away.

[0022] 3. In this invention, the first inclined section and the second inclined section of the bent portion may be parallel or non-parallel. The angle between the first inclined section and the extension line of the moving spring lead-out piece can be less than 90°, preferably greater than or equal to 45° and less than 90°, and can be set according to actual needs.

[0023] 4. In this invention, the bending portion includes an inclined section and a horizontal section. The inclined section is bent away from the stationary spring and extends inclinedly away from the moving contact along the length direction of the stationary spring. The horizontal section is connected to the inclined section and is perpendicular to the length direction of the stationary spring. When a short-circuit current passes through, the inclined section and the horizontal section generate an inclined electric repulsive force. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking.

[0024] 5. In this invention, the bending portion includes an inclined section and a horizontal section; the inclined section is bent toward the stationary spring and extends obliquely away from the moving contact along the length direction of the stationary spring; the horizontal section is connected to the inclined section and is perpendicular to the length direction of the stationary spring; the bending portion is provided with a notch to accommodate the stationary spring; when a short-circuit current passes through, the inclined section and the horizontal section generate an oblique electric repulsive force; the component of this electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-adhesion, or to tear apart the contacts welded together by the short-circuit current, making it easier to separate the contacts; the component of the electric repulsive force perpendicular to the length direction of the stationary spring acts on the moving contact to resist the moving contact from springing away.

[0025] 6. The contact system and relay of the present invention can prevent contact sticking in the presence of short-circuit current; while during normal operation, the bent part is an extended structure, which can increase the flexibility of the moving spring, reduce the reaction force of the moving spring, and facilitate contact disconnection. Attached Figure Description

[0026] Figure 1 Here is a structural diagram of the existing contact system;

[0027] Figure 2 A three-dimensional diagram of the existing contact system;

[0028] Figure 3 This is a structural diagram of the contact system of the present invention (Example 1);

[0029] Figure 4 This is a perspective view of the contact system of the present invention (Embodiment 1);

[0030] Figure 5 for Figure 4 Side view (Example 1);

[0031] Figure 6 This is a structural diagram of the contact system of the present invention (Embodiment 2);

[0032] Figure 7 This is a perspective view of the contact system of the present invention (Embodiment 2);

[0033] Figure 8 for Figure 7 Side view (Example 2);

[0034] Figure 9 This is a structural diagram of the contact system of the present invention (Embodiment 3);

[0035] Figure 10 This is a perspective view of the contact system of the present invention (Embodiment 3);

[0036] Figure 11 This is a structural diagram of the contact system of the present invention (Example 4);

[0037] Figure 12 The contact system of the present invention is three-dimensional. Figure 1 (Example 4);

[0038] Figure 13 The contact system of the present invention is three-dimensional. Figure 2 (Example 4);

[0039] in:

[0040] 10. Stationary spring section; 11. Stationary spring leaf; 12. Stationary contact; 20. Moving spring section; 21. Moving spring leaf; 21a. First moving spring leaf; 21b. Second moving spring leaf; 22. Moving contact; 23. Moving spring lead-out leaf; 24. Bending section; 24a. Inclined section; 24b. Horizontal section; 25. First inclined section; 26. Second inclined section; 27. Connecting section; 28. Transition section; 29. ​​Notch.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0042] The present invention will be further described below through specific embodiments.

[0043] In this invention, the terms "first," "second," and "third," 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. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two 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 alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0045] Example 1

[0046] See Figures 3-5 A contact system with anti-sticking function includes a stationary spring portion 10 and a movable spring portion 20. The stationary spring portion 10 may include a stationary spring sheet 11 and a stationary contact 12, with the stationary contact 12 connected to one end of the stationary spring sheet 11. The movable spring portion 20 includes a movable spring sheet 21 and a movable contact 22, with the movable contact 22 connected to one end of the movable spring sheet 21. The other end of the movable spring sheet 21 may be connected to and fixedly held by a movable spring lead-out piece 23, wherein both ends of the movable spring sheet and the movable spring lead-out piece 23 may be parallel to the stationary spring sheet 12.

[0047] The present invention provides a bent portion 24 between the two ends of the moving spring 21. This bent portion 24 forms an angle with the length direction of the stationary spring 11, i.e., the bent portion 24 is lengthened and designed to be inclined. The bent portion 24 can generate an inclined electro-repulsive force F when a short-circuit current passes through it. This inclined electro-repulsive force F has a component parallel to the length direction of the stationary spring 11, i.e., a vertical component F1 in the figure. This component F1 can act on the moving contact 22 to prevent sticking, or to tear apart any stuck moving contact 22. Because, when a short-circuit current is present, the large current creates a repulsive force between the moving contact 22 and the stationary contact 12, which will cause the moving contact 22 to spring apart. Simultaneously, according to Q=I... 2 Under high current (Rt), the contacts heat up severely and are prone to melting and sticking together due to heat. If the moving contact 22 is popped open, an explosion will occur.

[0048] Specifically, the bending portion 24 includes a first inclined section 25, a second inclined section 26, and a connecting section 27. The first inclined section 25 bends from one end near the moving spring 21 away from the stationary spring 11, and extends inclinedly along the length of the stationary spring 11 toward the moving contact 22 and connects to one end of the connecting section 27. One end of the moving spring 21 refers to the end where the moving contact 22 is located. An arc-shaped transition section 28 may also be provided between one end of the moving spring 21 and the first inclined section 25 to increase flexibility. The second inclined section 26 bends from the other end of the moving spring 21 away from the stationary spring 11, and extends inclinedly along the length of the stationary spring 11 toward the moving contact 22 and connects to the other end of the connecting section. The other end of the moving spring 21 refers to the end connected to the moving spring lead-out piece 23. The connecting segment 27 is designed in an arc shape to increase flexibility, so the first inclined segment 25, the second inclined segment 26 and the connecting segment 27 can form a U-shaped structure. The first inclined segment 25 and the second inclined segment 26 are designed to be longer, and the lever arm is lengthened. Among them, the inclined extension along the length direction of the stationary spring 11 toward the moving contact 22 means that it extends inclined along the length direction of the stationary spring 11 to the side where the moving contact 22 is located, which is shown as an upward inclined extension in the figure.

[0049] Furthermore, the first inclined segment 25 and the second inclined segment 26 may be parallel or non-parallel. The lengths of the first inclined segment 25 and the second inclined segment 26 can be set according to actual conditions, that is, the lengths of the first inclined segment 25 and the second inclined segment 26 may be equal or unequal. Preferably, the lengths of the first inclined segment 25 and the second inclined segment 26 are equal, which is beneficial for contact anti-sticking. According to the principle of Lorentz magnetic attraction in the same direction and repulsion in opposite directions, the short-circuit current flowing through the first inclined segment 25 and the second inclined segment 26 can generate a repulsive electric repulsive force. When the short-circuit current passes through, the first inclined segment 25 generates an inclined electric repulsive force F. The direction of this electric repulsive force F can be perpendicular to the first inclined segment 25. The component F1 of the inclined electric repulsive force F in the length direction of the moving spring lead-out piece 23 acts on the moving contact 22 to achieve anti-sticking. See [link to relevant documentation]. Figure 3 The component force F1 is upward, which can tear apart the bonded moving contact 22, thus improving contact anti-adhesion. The component force F2 of this upward-sloping repulsive force F in the direction perpendicular to the length of the stationary spring 11 (i.e., the horizontal direction) acts on the moving contact 22 to resist the aforementioned repulsive force F'. See [link to relevant documentation]. Figure 3 The component force F2 is directed to the left, i.e. towards the stationary spring part 10. This component force can close the moving contact 22, which is beneficial for resisting short-circuit current.

[0050] In this invention, the first inclined segment 25 and the second inclined segment 26 can be arranged parallel to each other. When a short-circuit current passes through, the second inclined segment 26 also generates an inclined electric repulsive force. Since the second inclined segment 26 is fixed to the moving spring lead-out piece 23, the inclined electric repulsive force is transmitted to the moving contact 22 through the first inclined segment 25. That is, the resultant force of the first inclined segment 25 and the second inclined segment 26 is also an inclined electric repulsive force F, which can also be divided into a vertical component force F1 and a horizontal component force F2.

[0051] Assuming the angles between the first inclined segment 25 and the second inclined segment 26 and the extension line of the moving spring lead-out piece 23 are a1 and a2 respectively, if the first inclined segment 25 and the second inclined segment 26 are parallel to each other, then the included angles a1 and a2 are equal, and the value of a1 is greater than 0° and less than 90°. When a1 is between 0° and 45°, the electric repulsive force F of the first inclined segment 25 increases in the horizontal direction as the angle a1 decreases. Under short-circuit current conditions, the Lorentz force generated in the direction of F2 will cause the contact to close, inhibiting the moving contact 22 from opening. When a1 is between 45° and 90°, the electric repulsive force F of the first inclined segment 25 increases in the vertical direction as the angle increases, enhancing the effect of rubbing the moving contact 22 and preventing the contact from sticking. Therefore, a suitable angle can be set according to actual needs, preferably 45°. In practical applications, the first inclined segment 25 and the second inclined segment 26 can also be set to be non-parallel, so the included angle a1 and included angle a2 are not equal.

[0052] Furthermore, the movable spring 21 of the present invention can be formed by stacking two movable springs, which may include a first movable spring 21a and a second movable spring 21b. One end of the first movable spring 21a and the second movable spring 21b are connected to the movable contact 22, and the other end of the first movable spring 21a and the second movable spring 21b are connected to the movable spring lead-out piece 23. There is a gap between the bent portion 24 of the first movable spring 21a and the bent portion 24 of the second movable spring 21b, so that the first movable spring 21a and the second movable spring 21b have space for deformation and are not easily jammed or interfered with each other. The first moving spring 21a and the second moving spring 21b are also provided with a bending portion 24 and a transition section 28, etc. Each bending portion 24 also has a first inclined section 25, a second inclined section 26 and a connecting section 27. The smaller the gap c between the two transition sections 28, the better, so as to ensure that the transition sections 28 do not interfere or contact during the movement of the two moving springs. With the length of the second inclined section 26 remaining unchanged, the smaller the gap c, the longer the length of the first inclined section 25 can be.

[0053] In addition, the first moving spring 21a is located on the side of the second moving spring 21b relative to the stationary spring portion 10. The distance between the first inclined section 25 and the second inclined section 26 of the first moving spring 21a is greater than the interval between the bent portion 24 of the first moving spring 21a and the bent portion 24 of the second moving spring 21b, which is beneficial to the deformation of the moving spring during the contact disconnection or closing process.

[0054] This invention also proposes a relay with anti-sticking contact function, which includes the aforementioned anti-sticking contact system, as well as other conventional relay components, such as a magnetic circuit system, a push part, and a base. The magnetic circuit system typically consists of a core, yoke, armature, coil, and other components. The contact part includes a moving spring portion 20 and a stationary spring portion 10. The push part generally includes a push clip. When the relay coil is energized, the magnetic circuit system operates, and the push clip actuates the moving spring piece 21 of the moving spring portion 20, causing the moving contact 22 to open or make contact. This invention is suitable for relay products requiring low height and large clearance.

[0055] The working principle of the contact system and relay of the present invention is as follows:

[0056] When the relay is operating, with the moving contact 22 and stationary contact 12 closed, if a short-circuit current occurs, it flows through the moving contact 22, moving spring 21, stationary contact 12, and stationary spring 11. Since the current directions on the moving spring 21 and stationary spring 11 are opposite, the moving contact 22 of the moving spring 21 will be subjected to an electric repulsive force F'. Simultaneously, the bending portion 24 generates an electric repulsive force F. Its vertical component F1 acts on the moving contact 22, effectively rubbing the contact 22, preventing the contacts from sticking together or tearing apart. Its horizontal component F2 resists the repulsive force F', suppressing the contact from springing open and thus closing the contacts. In this invention, the bending portion 24 improves flexibility and reduces the reaction force of the moving spring. Furthermore, when the relay is operating under non-short-circuit conditions, when the repulsive force generated by the current flowing through the moving spring 21 is greater than the rigidity of the moving spring 21 itself, it is sufficient to cause a slight deformation of the moving spring 21, which is beneficial for the contact to rub.

[0057] Example 2

[0058] See Figures 6-8 A contact system and relay with anti-contact adhesion function are disclosed. The main structure is the same as in Embodiment 1, except that the inclined extension direction of the bending portion 24 is different. Specifically, in this embodiment, the bending portion 24 includes a first inclined section 25, a second inclined section 26, and a connecting section 27. The first inclined section 25 bends from one end near the moving spring 21 away from the stationary spring 11, and extends inclinedly along the length of the stationary spring 11 away from the moving contact 22, connecting to one end of the connecting section 27. One end of the moving spring 21 refers to the end where the moving contact 22 is located. The first inclined section 25 is a straight segment. The second inclined section 26 bends from the other end of the moving spring 21 away from the stationary spring, and extends inclinedly along the length of the stationary spring 11 away from the moving contact 22, connecting to the other end of the connecting section 27. The other end of the moving spring 21 refers to the end connected to the moving spring lead-out piece 23. An arc-shaped transition section 28 can be provided between the second inclined section 26 and this end of the moving spring 21 to increase flexibility. The inclined extension away from the moving contact 22 along the length direction of the stationary spring 11 refers to the inclined extension along the length direction of the stationary spring 11 away from the side where the moving contact 22 is located.

[0059] In this embodiment, the first inclined segment 25 generates an inclined electro-repulsive force when a short-circuit current passes through it. The vertical component of this inclined electro-repulsive force acts on the moving contact 22 to prevent sticking. As shown in the figure, the moving contact 22 is located above the bent portion 24, and the moving spring lead-out piece 23 is located below the bent portion 24. Therefore, the first inclined segment 25 and the second inclined segment 26 extend downwards at an incline. The connecting segment 27 is arc-shaped to increase flexibility. Thus, the first inclined segment 25, the second inclined segment 26, and the connecting segment 27 can form a U-shaped structure. Furthermore, the first inclined segment 25 and the second inclined segment 26 are designed to be elongated, resulting in an extended lever arm.

[0060] In this embodiment, a longer first inclined segment 25 is more conducive to contact anti-sticking, but it cannot be too long, as this will increase costs. Conversely, a shorter first inclined segment 25 will result in insufficient flexibility. The specific length can be set according to actual conditions. The length of the first inclined segment 25 and the second inclined segment 26 can be equal or unequal. Preferably, the lengths of the first inclined segment 25 and the second inclined segment 26 are equal. According to the principle of Lorentz magnetic attraction in the same direction and repulsion in opposite directions, a short-circuit current flowing through the first inclined segment 25 and the second inclined segment 26 can generate a repulsive electromechanical force. The first inclined segment 25 generates an inclined repulsive force when the short-circuit current passes through it. The direction of this inclined repulsive force is perpendicular to the first inclined segment 25. The component F1 of the inclined electromechanical repulsive force F in the length direction of the moving spring lead-out piece 23 acts on the moving contact 22 to achieve anti-sticking. See [reference needed]. Figure 6 The component force F1 is upward, which can tear apart the bonded moving contact 22, thus improving contact anti-adhesion. The component force F2 of this inclined repulsive force F in the direction perpendicular to the length of the stationary spring 11, i.e., the horizontal direction, is in the same direction as the repulsive force F'. (See [reference needed]). Figure 6 The component force F2 is directed to the right, i.e. away from the static spring part 10.

[0061] In this invention, the first inclined segment 25 and the second inclined segment 26 can be arranged parallel to each other. When a short-circuit current passes through the second inclined segment 26, an inclined electric repulsive force is also generated. Since one end of the second inclined segment 26 is fixed to the moving spring lead-out piece 23, the inclined electric repulsive force is transmitted to the moving contact 22 through the first inclined segment 25. That is, the resultant force of the first inclined segment 25 and the second inclined segment 26 is also an inclined electric repulsive force F, which can also be divided into a vertical component force F1 and a horizontal component force F2.

[0062] See Figure 7Assuming the angles between the first inclined segment 25 and the second inclined segment 26 and the extension line of the moving spring lead-out piece 23 are a1 and a2 respectively, if the first inclined segment 25 and the second inclined segment 26 are parallel, then the included angles a1 and a2 are equal, and the value of a1 is greater than 45° and less than 90°. When a1 is between 0° and 45°, the electric repulsive force F of the first inclined segment 25 increases in the horizontal direction as the angle a1 decreases, which is not conducive to resisting the repulsive force F'. When a1 is between 45° and 90°, the electric repulsive force F of the first inclined segment 25 increases in the vertical direction as the angle increases, which has the effect of rubbing the moving contact 22 and can prevent the contact from sticking. Therefore, a suitable angle can be set according to actual needs, preferably 45°. In practical applications, the first inclined segment 25 and the second inclined segment 26 can also be set to be non-parallel, then the included angles a1 and a2 are not equal.

[0063] The working principle of the contact system and relay in this embodiment is as follows:

[0064] When the relay is working, if a short-circuit current occurs when the moving contact 22 and the stationary contact 12 of the contact system are closed, it flows through the moving contact 22, the moving spring 21, the stationary contact 12 and the stationary spring 11. Since the current directions on the moving spring 21 and the stationary spring 11 are opposite, the moving contact 22 of the moving spring 21 will be subjected to an electric repulsive force F'. At the same time, the bending part 24 generates an inclined electric repulsive force F, the vertical component of which, F1, acts on the moving contact 22, which has the effect of rubbing the contact 22, and can prevent the contacts from sticking or tearing apart the stuck contacts.

[0065] In this invention, the bending portion 24 improves flexibility and reduces the reaction force of the moving spring. In addition, when the relay is operating under non-short-circuit conditions, when the repulsive force generated by the current flowing through the moving spring 21 is greater than the rigidity of the moving spring 21 itself, it is sufficient to cause a slight deformation of the moving spring 21, which is conducive to the contact rubbing.

[0066] Example 3

[0067] A contact system and relay with anti-contact adhesion function have the same main structure as Embodiment 2, except that the bending section structure is different. See also Figures 9-10 In this embodiment, the bending portion includes an inclined section 24a and a horizontal section 24b. The inclined section 24a bends from one end near the moving spring sheet in a direction away from the stationary spring sheet 11, and extends inclinedly away from the moving contact 22 along the length direction of the stationary spring sheet 11. The horizontal section 24b bends from the other end of the moving spring sheet in a direction away from the stationary spring sheet 11, and then extends perpendicularly to the length direction of the stationary spring sheet 11, connecting to the corresponding end of the inclined section 24a. A transition section 28 may be provided at the connection between the inclined section 24a and the horizontal section 24b to increase flexibility. Extending inclinedly away from the moving contact 22 along the length direction of the stationary spring sheet 11 means extending inclinedly along the side away from the moving contact 22 along the length direction of the stationary spring sheet 11.

[0068] Specifically, the length of the inclined section 24a can be the same as or different from the length of the horizontal section 24b. The inclined section 24a and the horizontal section 24b form an angle. When a short-circuit current passes through, the inclined section 24a generates an inclined electrodynamic repulsive force, the direction of which can be perpendicular to the inclined section 24a. The component of the inclined electrodynamic repulsive force parallel to the length direction of the stationary spring 11 acts on the moving contact to achieve anti-sticking. See also... Figure 9 The component force F1 is upward, which can tear apart the bonded moving contact 22, thus improving contact anti-adhesion. The component force F2 of this inclined repulsive force F in the direction perpendicular to the length of the stationary spring 11, i.e., the horizontal direction, is in the same direction as the repulsive force F'. (See [reference needed]). Figure 9 The component force F2 is directed to the right, i.e. away from the static spring part 10.

[0069] In this embodiment, the horizontal segment 24b also generates an electric repulsive force when a short-circuit current passes through it. Since one end of the horizontal segment 24b is fixed to the moving spring lead-out piece 23, the electric repulsive force generated by the horizontal segment 24b is transmitted to the moving contact 22 through the inclined segment 24a. That is, the resultant force of the inclined segment 24a and the horizontal segment 24b is also an inclined electric repulsive force F, which can also be divided into a vertical component force F1 and a horizontal component force F2.

[0070] Furthermore, the angle a3 between the horizontal segment 24b and the inclined segment 24a is greater than zero degrees and less than 90 degrees, preferably 0 to 45 degrees. When the angle a3 is 0 to 45 degrees, the component force F1 of the inclined electric repulsion force is greater than the component force F2. The component force F1 can tear the bonded moving contact 22 apart, which is beneficial to the anti-adhesion of the contact.

[0071] The working principle of the contact system and relay in this embodiment is as follows:

[0072] When the relay is working, if a short-circuit current occurs when the moving contact 22 and the stationary contact 12 of the contact system are closed, it flows through the moving contact 22, the moving spring 21, the stationary contact 12 and the stationary spring 11. Since the current directions on the moving spring 21 and the stationary spring 11 are opposite, the moving contact 22 of the moving spring 21 will be subjected to an electric repulsive force F'. At the same time, the bending part 24 generates an inclined electric repulsive force F, the vertical component of which, F1, acts on the moving contact 22, which has the effect of rubbing the contact 22, and can prevent the contacts from sticking or tearing apart the stuck contacts.

[0073] In this invention, the bending portion 24 improves flexibility and reduces the reaction force of the moving spring. In addition, when the relay is operating under non-short-circuit conditions, when the repulsive force generated by the current flowing through the moving spring 21 is greater than the rigidity of the moving spring 21 itself, it is sufficient to cause a slight deformation of the moving spring 21, which is conducive to the contact rubbing.

[0074] Example 4

[0075] A contact system and relay with anti-contact adhesion function have the same main structure as Embodiment 3, except that the bending section structure is different. See also Figures 11-13 In this embodiment, the bending portion includes an inclined section 24a and a horizontal section 24b. The inclined section 24a bends from one end near the moving spring towards the stationary spring 11, and extends inclinedly along the length of the stationary spring 11 away from the moving contact 22 to the side of the stationary spring 11 opposite to the moving spring. The horizontal section 24b bends from the other end of the moving spring towards the stationary spring 11 and extends in a direction perpendicular to the length of the stationary spring 11, connecting to the corresponding end of the inclined section 24a, i.e., the horizontal section 24b extends to the side of the stationary spring 11 opposite to the moving spring 21. A transition section 28 can be provided at the connection between the inclined section 24a and the horizontal section 24b to increase flexibility. The bending portion is provided with a notch 29 to accommodate the stationary spring 11, that is, the inclined section 24a and the horizontal section 24b are respectively provided with notches 29 to accommodate the stationary spring 11. There can be a gap between the notch 29 and the stationary spring 11 to avoid interference.

[0076] Specifically, the length of the inclined section 24a can be the same as or different from the length of the horizontal section 24b. The inclined section 24a and the horizontal section 24b form an angle. When a short-circuit current passes through, the inclined section 24a generates an inclined electrodynamic repulsive force, the direction of which can be perpendicular to the inclined section 24a. The component of the inclined electrodynamic repulsive force parallel to the length direction of the stationary spring 11 acts on the moving contact to achieve anti-sticking. See also... Figure 11 The component force F1 is upward, which can tear apart the bonded moving contact 22, thus improving contact anti-adhesion. The component force F2 of this inclined repulsive force F in the direction perpendicular to the length of the stationary spring 11, i.e., the horizontal direction, is opposite to the repulsive force F'. (See [reference needed]). Figure 11 The component force F2 is directed to the left, which can close the moving contact 22, thus helping to resist short-circuit current.

[0077] In this embodiment, the horizontal segment 24b also generates an electric repulsive force when a short-circuit current passes through it. Since one end of the horizontal segment 24b is fixed to the moving spring lead-out piece 23, the electric repulsive force generated by the horizontal segment 24b is transmitted to the moving contact 22 through the inclined segment 24a. That is, the resultant force of the inclined segment 24a and the horizontal segment 24b is also an inclined electric repulsive force F, which can also be divided into a vertical component force F1 and a horizontal component force F2.

[0078] Furthermore, the angle α3 between the horizontal segment 24b and the inclined segment 24a is greater than zero degrees and less than 90 degrees, preferably 45°. At this angle, the component force F1 can tear the bonded moving contact 22 apart, which is beneficial for the contact to resist adhesion, and the component force F2 can close the moving contact 22, which is beneficial for resisting short-circuit current.

[0079] The working principle of the contact system and relay in this embodiment is as follows:

[0080] When the relay is working, if a short-circuit current occurs when the moving contact 22 and the stationary contact 12 of the contact system are closed, it flows through the moving contact 22, the moving spring 21, the stationary contact 12, and the stationary spring 11. Since the current directions on the moving spring 21 and the stationary spring 11 are opposite, the moving contact 22 of the moving spring 21 will be subjected to an electric repulsive force F'. At the same time, the bending part 24 generates an inclined electric repulsive force F. Its vertical component F1 acts on the moving contact 22, which has the effect of rubbing the contact 22, preventing the contacts from sticking or tearing apart. Its horizontal component F2 can resist the repulsive force F' and suppress the moving contact 22 from springing open, so that the contacts are closed.

[0081] In this invention, the bending portion 24 improves flexibility and reduces the reaction force of the moving spring. In addition, when the relay is operating under non-short-circuit conditions, when the repulsive force generated by the current flowing through the moving spring 21 is greater than the rigidity of the moving spring 21 itself, it is sufficient to cause a slight deformation of the moving spring 21, which is conducive to the contact rubbing.

[0082] Example 5

[0083] A contact system and relay with anti-contact adhesion function has the same main structure as Embodiment 4, except that the structure of the bending portion 24 is different. In this embodiment, the bending portion 24 includes an inclined section 24a and a horizontal section 24b. The inclined section 24a is bent from the end near the moving spring 21 toward the stationary spring 11, and extends obliquely away from the moving contact 22 along the length direction of the stationary spring 11, but the inclined section 24a does not extend to the side of the stationary spring 11 opposite to the moving spring 22. The horizontal section 24b is bent from the other end of the moving spring toward the stationary spring 11 and extends in a direction perpendicular to the length direction of the stationary spring 11 and connects to the corresponding end of the inclined section 24a. The horizontal section 24b also does not extend to the side of the stationary spring 11 opposite to the moving spring 21.

[0084] The contact system and relay in this embodiment operate on the same principle as in Embodiment 4, as detailed below:

[0085] When the relay is working, if a short-circuit current occurs when the moving contact 22 and the stationary contact 12 of the contact system are closed, it flows through the moving contact 22, the moving spring 21, the stationary contact 12, and the stationary spring 11. Since the current directions on the moving spring 21 and the stationary spring 11 are opposite, the moving contact 22 of the moving spring 21 will be subjected to an electric repulsive force F'. At the same time, the bending part 24 generates an inclined electric repulsive force F. Its vertical component F1 acts on the moving contact 22, which has the effect of rubbing the contact 22, preventing the contacts from sticking or tearing apart. Its horizontal component F2 can resist the repulsive force F' and suppress the moving contact 22 from springing open, so that the contacts are closed.

[0086] In this invention, the bending portion 24 improves flexibility and reduces the reaction force of the moving spring. In addition, when the relay is operating under non-short-circuit conditions, when the repulsive force generated by the current flowing through the moving spring 21 is greater than the rigidity of the moving spring 21 itself, it is sufficient to cause a slight deformation of the moving spring 21, which is conducive to the contact rubbing.

[0087] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A contact system with anti-contact adhesion function, comprising a stationary spring portion and a movable spring portion; the movable spring portion includes a movable spring plate and a movable contact, the movable contact being connected to one end of the movable spring plate; the stationary spring portion is provided with a stationary spring plate; characterized in that: A bend is provided between the two ends of the moving spring, the bend including an inclined section, the inclined section extending at least partially in a straight line and forming an angle with the length direction of the stationary spring to generate an inclined electric repulsive force when a short-circuit current passes through, the electric repulsive force having a component force parallel to the length direction of the stationary spring to act on the moving contact to achieve anti-sticking.

2. The contact system with anti-sticking function as described in claim 1, characterized in that: The bending portion includes a first inclined section, a second inclined section, and a connecting section; the first inclined section is the inclined section that bends from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly towards the moving contact along the length direction of the stationary spring and connects to one end of the connecting section; the second inclined section is the inclined section that bends from the other end of the moving spring in a direction away from the stationary spring, and extends inclinedly towards the moving contact along the length direction of the stationary spring and connects to the other end of the connecting section.

3. A contact system with anti-sticking function as described in claim 2, characterized in that: The first inclined segment may be parallel or not parallel to the second inclined segment. When a short-circuit current passes through the first inclined segment and / or the second inclined segment, the electric repulsive force is generated. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to prevent sticking. The component of the electric repulsive force perpendicular to the length direction of the stationary spring acts on the moving contact to resist the moving contact from springing away.

4. A contact system with anti-sticking function as described in claim 1, characterized in that: The bending portion includes a first inclined section, a second inclined section, and a connecting section; the first inclined section is the inclined section that bends from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly along the length of the stationary spring away from the moving contact and connects to one end of the connecting section; the second inclined section bends from the other end of the moving spring in a direction away from the stationary spring, and extends inclinedly along the length of the stationary spring away from the moving contact and connects to the other end of the connecting section.

5. A contact system with anti-sticking function as described in claim 4, characterized in that: The first inclined segment may be parallel to or not parallel to the second inclined segment. When a short-circuit current passes through the first inclined segment and / or the second inclined segment, the inclined electric repulsive force is generated. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking.

6. A contact system with anti-sticking function as described in claim 2 or 4, characterized in that: The angle between the first inclined segment and the length direction of the static spring is greater than or equal to 45° and less than 90°.

7. A contact system with anti-sticking function as described in claim 1, characterized in that: The bending portion includes an inclined section and a horizontal section; the inclined section is bent from one end near the moving spring in a direction away from the stationary spring, and extends inclinedly away from the moving contact along the length direction of the stationary spring; the horizontal section is bent from the other end of the moving spring in a direction away from the stationary spring, and then extends perpendicularly to the length direction of the stationary spring and connects to the corresponding end of the inclined section.

8. A contact system with anti-sticking function as described in claim 7, characterized in that: The inclined section and the horizontal section have an angle. When a short-circuit current passes through, the inclined section and / or the horizontal section generate an inclined electric repulsive force. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking.

9. A contact system with anti-sticking function as described in claim 1, characterized in that: The bending portion includes an inclined section and a horizontal section; the inclined section bends from one end near the moving spring towards the stationary spring, and extends obliquely away from the moving contact along the length direction of the stationary spring to the side of the stationary spring opposite to the moving spring; the horizontal section bends from the other end of the moving spring towards the stationary spring and extends in a direction perpendicular to the length direction of the stationary spring and connects to the corresponding end of the inclined section; the bending portion has a notch to accommodate the stationary spring.

10. A contact system with anti-contact adhesion function as described in claim 1, characterized in that: The bending portion includes an inclined section and a horizontal section; the inclined section is bent from one end near the moving spring towards the stationary spring, and extends inclinedly away from the moving contact along the length direction of the stationary spring; the horizontal section is bent from the other end of the moving spring towards the stationary spring and extends in a direction perpendicular to the length direction of the stationary spring and connects to the corresponding end of the inclined section.

11. A contact system with anti-sticking function as described in claim 9 or 10, characterized in that: The inclined section and the horizontal section have an angle. When a short-circuit current passes through the inclined section and / or the horizontal section, an inclined electric repulsive force is generated. The component of the electric repulsive force parallel to the length direction of the stationary spring acts on the moving contact to achieve anti-sticking. The component of the electric repulsive force perpendicular to the length direction of the stationary spring acts on the moving contact to resist the moving contact from springing away.

12. A contact system with anti-contact adhesion function as described in claim 7, 9, or 10, characterized in that: The angle between the inclined segment and the horizontal segment is greater than 0° and less than 90°.

13. A relay with anti-contact sticking function, characterized in that: A contact system with anti-sticking function as described in any one of claims 1 to 12 is provided.

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