Effective reset contact control mechanism and switch

Abstract

An effective return contact control mechanism comprising: a sliding wheel (40), a sliding bed (31) and a first control section (21), wherein the sliding bed (31) is provided with a sliding groove (32), wherein the sliding wheel (40) is arranged on the sliding groove (32), wherein the first control section (21) is adapted to cooperate with a control end (41) of the sliding wheel (40), characterized in that the return contact control mechanism further comprises: a second control section (22), wherein the control end (41) of the sliding wheel (40) is located between the first control section (21) and the second control section (22); wherein the sliding wheel (40) is configured to move away from the sliding groove (32) during the movement of the control end (41) of the sliding wheel (40) driven by the second control section (22), so that the frictional force on the sliding wheel (40) is reduced.

Description

CROSS REFERENCEThis application claims priority to Chinese Patent Application No. 201910385879.9 filed on May 9, 2919, the entire contents of which are incorporated herein by reference.TECHNICAL FIELDThe present disclosure relates to a technical field of electrical equipment, and more particularly to an effective reset contact control mechanism and switch.BACKGROUNDSwitches are widely used in control circuits of various devices to improve the opening capability of the switch contacts, a large number of common electromechanical switches use a contact control mechanism to mechanically press the contacts to open, which fully uses the external large driving force to forcibly open the closed contacts. As shown in FIGS. 1 to 3, in the contact control mechanism of the related art, the push rod 101 drives the slide gear 102 to slide in the slide groove 103, and the slide gear 102 is used to brush the movable spring 104 so that the movable contact 105 and the fixed contact 106 are forcibly opened; when the push rod 101 releases the slide gear 102, the force F 1 generated by the elastic restoring action of the movable spring 104 pushes the slide gear 102 backward and the slide gear 102 is restored to the state shown in FIG. 1.As shown in FIG. 4, fine particles such as dust will inevitably fall into the slide groove 103, i.e., between the slide groove 103 and the slide wheel 102, such as metal chips generated by the contacts during closing and opening, or foreign matters generated by friction of insulating materials, etc. Due to the irregular shape of the dust particles and the occurrence of many corners or sharp tips, the particles are difficult to roll between the sliding surfaces and the sliding frictional force f of the sliding wheel 102 sliding in the sliding groove 103 is greatly increased when the sliding frictional force f is larger than the force F1 caused by the elastic recovery of the movable spring 104, the elastic recovery of the movable spring 104 alone is unable to press the sliding wheel 102 for recovery, whereby the movable contact 105 and the fixed contact 106 are exposed and not in contact, i.e., the switch remains opened, there is a hidden risk that it cannot be automatically recovered and closed.CN 1 08 807 055 A discloses a contact sliding and braking mechanism of a switch comprising a movable contact spring, a static contact spring, a button, a sliding bed, a sliding groove, a sliding wheel and a control section.SUMMARYThe object of the present invention is to overcome the disadvantages of the prior art and to provide an effective reset contact control mechanism capable of assisting the switch in automatically resetting and closing and an effective reset switch based on the contact control mechanism.The technical solution of the present disclosure is as follows:According to an aspect of the present disclosure, there is provided an effective reset contact control mechanism including: a slide wheel, a slide bed, and a first control portion, the slide bed being provided with a slide groove, the slide wheel being disposed on the slide groove, the first control portion being configured to cooperate with a control end of the slide wheel, characterized in that the reset contact control mechanism further comprises: a second control portion, the control end of the slide wheel being located between the first control portion and the second control portion; the slide wheel being configured to move away from the slide groove during the movement of the control end of the slide wheel driven by the second control portion, such that the frictional force on the slide wheel is reduced.In an exemplary embodiment, the reset contact control mechanism further includes: a push rod, wherein the first control portion and the second control portion are disposed at locations at different heights along a height direction of the push rod.In an exemplary embodiment, the sliding wheel has an approximately semicircular structure, wherein the sliding wheel and the sliding groove of the sliding bed are adapted in a curved manner.In an exemplary embodiment, the control end of the slider is formed by the second control portion forming an avoidance space.In an exemplary embodiment, during the movement of the control end of the sliding wheel driven by the second control section, the drive end of the sliding wheel abuts against the sliding groove and forms a pivot point, wherein the sliding wheel is configured to rotate about the pivot point and move away from the sliding groove.In an exemplary embodiment, a side of the slide gear is provided with a limiting support shaft, and a limiting groove corresponding to the limiting support shaft is provided, and the limiting support shaft is disposed in the limiting groove; wherein during rotation of the slide gear, a rotation limitation is formed when the limiting support shaft abuts against a limiting groove wall of the limiting groove.In an exemplary embodiment, the limiting support shaft is configured to abut against the limiting groove wall of the limiting groove to form a first support point during rotation of the sliding wheel, and the sliding wheel is configured to abut against the sliding groove to form a second support point, wherein the rotation limitation is formed by a two-point support.In an exemplary embodiment, a cross section of the limiting support shaft approximately has a shape of a sharp corner, a triangle, a fan, or a circle.In an exemplary embodiment, the limiting groove includes a first limiting groove wall toward the driving end and a second limiting groove wall toward the control end, wherein a distance between one end of the first limiting groove wall and one end of the second limiting groove wall, the two ends facing the sliding groove, is greater than a distance between the other two ends.According to another aspect of the present disclosure, there is provided an effective reset switch including: a housing, a movable spring, a movable contact, a fixed contact, and a reset contact contact control mechanism according to any one of the above-described embodiments, wherein the reset contact control mechanism is configured to act on the movable spring to drive the movable contact to move; wherein the first control portion of the contact control mechanism is configured to act on the slide gear, the slide gear is apart from a slide groove, and the frictional force received by the slide gear is reduced when the elastic reset force of the movable spring cannot press a slide gear of the contact control mechanism to reset it.In an exemplary embodiment, a part of the limiting groove corresponding to a limiting support shaft of the slide gear is opened on an inner wall of the housing.In an exemplary embodiment, a driving end of the slider is configured to drive the movable contact and the fixed contact to open, wherein the movable contact and the fixed contact are closed after a second control portion controls the slider to reset.The advantageous effects of the present disclosure are as follows:The effective reset contact control mechanism described in the present disclosure is suitable for electric appliances such as switches (or snap switches), circuit breakers, laterally mounted contacts, etc., which are provided with contact mechanisms and can be switched between open and closed states, the slide wheel slides along the slide groove and acts on the contact mechanism by the change in the position of the driving end, which is utilized to realize the forced opening of the open and closed states of the electric appliance. When the slide gear is driven to a position corresponding to another working state, the second control portion lifts the control end of the slide gear so that the slide gear and the slide groove abut each other to form a fulcrum, the slide gear rotates around the fulcrum and away from the slide groove, eliminating the frictional force of the slide gear due to dust, whereupon the frictional force acting on the slide gear is greatly reduced, so that the slide gear can be restored only by the elastic restoring force of the contact mechanism. In particular, the present disclosure is applicable to the situation where the frictional force on the slider is increased due to dust accumulation and the elastic restoring force of the contact mechanism cannot be used to press the slider for restoring to ensure that the contact control mechanism can effectively release the contact mechanism, thereby ensuring that the electric device is effectively restored. The sliding wheel of the present disclosure is not provided with a fixed fulcrum and can achieve a longer stroke with a smaller volume, which is advantageous for miniaturized design of the product.The effective reset switch described in the present disclosure can ensure effective reset based on the contact control mechanism, and can avoid the hidden risk that the switch cannot be effectively reset due to dust accumulation.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic structural view of a prior art contact force opening mechanism (initial state of closed contacts). FIG. 2 is a schematic structural view of contacts in a forced open state in the contact forced open mechanism of the related art. FIG. 3 is a schematic view of the state of the prior art contact force opening mechanism that performs the returning and closing (F 1 is the elastic restoring force of the movable spring). FIG. 4 is a schematic view of the state of the prior art contact force opening mechanism in the case of dust accumulation (f is the frictional force acting on the slider). FIG. 5 is a schematic structural view of a contact control mechanism of the first embodiment (initial state of closed contacts). FIG. 6 is a schematic structural view of the contacts in a forced open state in the contact control mechanism of the first embodiment. FIG. 7 is a schematic view of the state of the contact control mechanism of the first embodiment that performs the reset and closing. FIG. 8 is a schematic structural view of the contact control mechanism of the first embodiment in a state where the slide gear is removed from the slide groove. FIG. 9 is a schematic structural view of a contact control mechanism of the second embodiment (initial state of closed contacts). FIG. 10 is a schematic structural view of the contacts in a forced open state in the contact control mechanism of the second embodiment. FIG. 11 is a schematic view of the state of the contact control mechanism of the second embodiment that performs the reset and close. FIG. 12 is a schematic view of the arrangement of the restriction support shaft and the restriction groove of the slide wheel.In the figures, 101 is a push rod, 102 is a slide wheel, 103 is a slide groove, 104 is a movable spring, 105 is a movable contact, 106 is a fixed contact, 20 is a push rod, 21 is a first control portion, 22 is a second control portion, 30 is a housing, 31 is a slide bed, 32 is a slide groove, 33 is a boundary groove, 331 is a first boundary groove wall, 332 is a second boundary groove wall, 333 is a bent notch, 40 is a slide wheel, 41 is a control end, 42 is a driving end, 43 is a wheel arc surface, 44 is a escape space, 45 is a boundary support shaft, 451 is a first boundary slope, 452 is a second boundary slope, 50 is a movable spring, 51 is a movable contact, 54 is a fixed contact, 60 is a spring, 61 is a spring arm, 62 is a stationary contact spring, 63 - movable normally-open contact spring, 64 - movable normally-open contact, 65 - fixed normally-open contact, 66 - fixed normally-open contact spring, 67 - movable normally-open contact spring, 68 - movable normally-open contact, 69 - fixed normally-open contact, 70 - support frame.DETAILED DESCRIPTIONThe disclosure will be described in more detail below with reference to the drawings and embodiments.The present disclosure provides an effective reset contact control mechanism and a switch based on the contact control mechanism to solve the problem that the electric device cannot be reset due to dust accumulation in the related art, that is, the normally closed contact cannot be reset and closed after the forced opening and that the normally open contact cannot be reset and opened after the forced closing, and the first control portion and the second control portion, respectively, act on the control end of the slide gear to realize the forced opening and the auxiliary reset of the contact mechanism of the electric device, which can ensure the effective opening and the effective reset of the electric device and improve the stability of the operation of the electric device.The first embodimentThe contact control mechanism for effective recovery described in the present disclosure is suitable for electrical equipment such as switches, circuit breakers, laterally mounted contacts, etc., and the embodiment will be described in detail with reference to an example of a movable spring implemented in a switch and acting on a normally closed contact.As shown in FIGS. 5 to 8, the contact control mechanism for effective recovery includes a slide wheel 40, a slide bed 31 and a first control portion 21, the slide bed 31 is provided with a slide groove 32, and the slide wheel 40 includes a control end 41 and a drive end 42 at both ends thereof, and a wheel arch surface 43 cooperates with the slide groove 32, the slide wheel 40 and the slide groove 32 of the slide bed 31 being adapted to be curved by the wheel arch surface 43. The first control portion 21 cooperates with the control end 41 of the slider 40 and the driving end 42 of the slider 40 cooperates with the movable spring 50 of the switch, the first control portion 21 cooperates with the control end 41 of the slider 40 to press the slider 40 to move it, the driving end 42 of the slider 40 is pressed against the movable spring 50, and the movable spring 50 elastically deforms, and then the movable contact 51 of the movable spring 50 is separated from the fixed contact 52, i.e., the switch is forcibly opened.Furthermore, the contact control mechanism includes a second control section 22, the control end 41 of the slide wheel 40 being located between the first control section 21 and the second control section 22, the second control section 22 acting on the control end 41 of the slide wheel 40 in the opposite direction (the direction of movement of the operatively operating second control section 22 is opposite to that of the first control section 21), the drive end 42 of the slide wheel 40 abutting against the slide groove 32 and forming a fulcrum during the movement of the control end 41 of the slide wheel 40 driven by the second control section 22, the slide wheel 40 rotating about the fulcrum and away from the slide groove 32 to avoid contact with dust. The purpose of providing the second control portion 22 in the present disclosure is that the frictional force acting on the slide gear 40 can be reduced by moving the slide gear 40 away from the slide groove 32, i.e., away from the dust, when the frictional force acting on the slide gear 40 is greatly increased due to dust accumulation between the slide gear 40 and the slide groove 32, and then when the slide gear 40, which should be restored under the elastic restoring force of the movable spring, cannot be restored solely by the elastic restoring force of the movable spring 50. As the slide gear 40 moves away from the slide groove 32, the frictional force acting on the slide gear 40 becomes smaller and smaller until the elastic restoring force of the movable spring 50 is larger than the frictional force acting on the slide gear 40, whereupon it can press the slide gear 40 alone by the elastic restoring force of the movable spring 50 to be restored, whereby the movable contact 51 comes into contact with the fixed contact 52 and the switch is closed. On the other hand, the slide gear 40 remains in the force-open position due to the frictional force of the dust, and the switch remains in a force-open state when the elastic restoring force of the movable spring 50 is not sufficient to restore it even when the first control portion 21 is separated from the control end 41 of the slide gear 40. In the positional relationship shown in the drawings, the first control portion 21 is used to depress the control end 41 of the slider 40, and the second control portion 22 is used to raise the control end 41 of the slider 40, whereupon the driving end 42 of the slider 40 is used to urge the movable spring 50 and the slider 40 away from the slide groove 32, respectively.Since the slide gear 40 slides along the slide groove 32, one end of the slide groove 32 of the movable spring 50 is closer in the vertical direction than the other end to allow the slide gear 40 to effectively abut and press the movable spring 50 to form a certain degree of elastic deformation in the force open position, and the driving end 42 of the slide gear 40 and the end of the slide groove 32 closer to the movable spring 50 abut each other to form a fulcrum. In the positional relationship shown in the drawings, one end of the slide groove 32 in the vicinity of the movable spring 50 is higher than the other end, and the cross-sectional shape of the slide groove 32 is approximately 1 / 4 circular arc in this embodiment. When the return fails, the slide gear 40 remains in the force open position, and the driving end 42 of the slide gear 40 and the end of the slide groove 32 abut each other at a relatively greater height to form a fulcrum. More specifically, the slide gear 40 gradually moves away from the slide groove 32 from the end near the second control portion, and the frictional force acting on the slide gear 40 gradually decreases as the slide gear 40 rotates about the fulcrum.In order to allow the first control portion 21 and the second control portion 22 to press, the control end 41 side of the slider 40 extends toward the first control portion 21 and the second control portion 22 from the sliding groove 32, thereby preventing the control end 41 of the slider 40 from being blocked by the sliding groove 32 or the sliding bed 31, thereby adversely affecting the contact between the first control portion 21 and the control end 41 of the slider 40 and that of the second control portion 22 and the control end 41 of the slider 40.Further, the contact control mechanism in the embodiment is provided with a push rod 20, and the first control portion 21 and the second control portion 22 are respectively disposed at positions different in height along the height direction of the push rod 20. The first control section 21 and the second control section 22 constitute a linkage mechanism by the push rod 20, i.e., raise and lower simultaneously, and on the one hand, the first control section 21 and the second control section 22 can be prevented from locking on the moving path during the working process, the structural arrangement is simplified, and is conducive to miniaturization of the product; on the other hand, it is possible to avoid interference between the first control section 21 and the second control section 22 and ensure stable and efficient operation. Thus, in the positional relationship shown in the drawings, since the first control portion 21 is used to depress the control end 41 of the slider 40, the second control portion 22 is used to raise the control end 41 of the slider 40, the first control portion 21 is provided at a higher location than the second control portion 22 in terms of height. In order to shorten the length requirement of the push rod 20, the second control portion 22 may be provided at the lower end of the push rod 20, and the first control portion 21 may be provided at any higher location than the second control portion 22.To accommodate multiple sets of contacts, a push rod 20 may simultaneously achieve the positive opening and the auxiliary release of multiple sets of contacts. The first control portion 21 and the second control portion 22 extend laterally from the side wall of the push rod 20. In the implementation, it is sufficient to adjust the postures of the first control portion 21, the second control portion 22, and the slider 40. In this embodiment, the structures of the first control portion 21 and the second control portion 22 are similar, and they are protrusions extending laterally from the side wall of the push rod 20, and the protrusion may be set as a triangular structure, a hook-shaped structure toward the control end 41, or a plate structure, and the like. When two groups of contacts are provided, on the left and right sides of the switch, a contact control mechanism is provided for each group of contacts, and the first control portion 21 and the second control portion 22 are provided on both sides of the push rod 20, respectively.The slide wheel 40 generally has a semicircular structure in the embodiment, which is a specially shaped structure approximating a semicircular structure, and the control end 41 is formed by disposing an escape space 44 toward the second control portion 22. Note that "approximately" in the present disclosure refers to proximity, i.e., the structure is not strictly limited to a particular feature and may be realized within a particular range of variables. From a structural viewpoint, the control end 41 of the slider 40 is processed to form an escape space 44 to form a location where the first control portion 21 and the second control portion 22 can form an abutting contact in the positional relationship shown in the drawings, in particular, the second control portion 22, the second control portion 22 moves upward from below the control end 41 and comes into contact with the lower surface of the control end 41. In this case, the escape space 44 can be penetrated in the thickness direction of the sliding wheel 40 or can be a blind hole which is opened inward from the arch surface 43. That is, the escape space 44 is a notch formed toward the second control portion 22; or the escape space 44 is a blind groove opened toward the second control portion 22. The shape of the notch or blind groove may be set as a triangular notch or a triangular blind groove or a hook-shaped notch or a hook-shaped blind groove toward the control end 41 in accordance with the requirements of the implementation. In the embodiment, the escape space 44 is formed by a triangular notch penetrating the slider 40, and the lower surface of the control end 41 forms a substantially flat surface for abutting contact with the second control portion 22.Thus, since the slide wheel 40 slides along the slide groove 32 and the slide wheel 40 has a certain rotation angle during the sliding process, the fixed fulcrum for the slide wheel 40 is not provided, which can ensure that the slide wheel 40 can obtain a longer stroke with a smaller volume and promote the design of miniaturization of the product. In the present disclosure, the side of the slide gear 40 is provided with a restriction support shaft 45, and a restriction groove 33 corresponding to the restriction support shaft 45 is provided, and the restriction support shaft 45 is provided in the restriction groove 33; by cooperation of the restriction groove 33 and the restriction support shaft 45, the dynamic attachment and the stroke limit value of the slide gear 40 are realized. In order to satisfy the sliding stroke of the slider 40, the restricting groove 33 has a certain width and is used to satisfy the sliding and rotation of the slider 40, that is, the movement and rotation of the restricting support shaft 45 are satisfied. When the restriction support shaft 45 abuts against the groove wall of the restriction groove 33 during the rotation of the slider 40, a rotation restriction is formed.More specifically, during the rotation of the slider 40, the restriction support shaft 45 abuts against the groove wall of the restriction groove 33 to form a first support point, and the slider 40 abuts against the slider groove 32 to form a second support point, whereby a rotation restriction is formed by the two-point support. The restriction groove 33 may be set to one-side restriction or two-side restriction in accordance with the requirements of implementation, i.e., the restriction of the movement in the direction of the force-opening and the restriction of the movement in the direction of the return. When the restricting groove 33 is implemented as a two-sided restriction, two support points are formed when the contacts are forcibly opened, and two other support points are formed when forcibly restored.In the embodiment, the restriction groove 33 is implemented as a two-side restriction, and accordingly, the restriction support shaft 45 is also formed as a structure that enables the two-side restriction. That is, the restriction support shaft 45 includes a first restriction inclination 451 toward the driving end 42 and a second restriction inclination 452 toward the control end 41. the distance between one end of the first restriction inclination 451 and one end of the second restriction inclination 452, the two ends facing the slide groove 32, is greater than the distance between the other two ends. The limiting groove 33 includes a first limiting groove wall 331 toward the driving end 42 and a second limiting groove wall 332 toward the control end 41. the distance between one end of the first limiting groove wall 331 and one end of the second limiting groove wall 332 with the two ends facing the slide groove 32 is greater than the distance between the other two ends. In accordance with the positional relationship shown in the drawings, the restriction support shaft has a narrow top and wide bottom structure, and the restriction groove 33 also has a narrow top and wide bottom structure.As shown in FIG. 1, the cross section of the restriction support shaft 45 in this embodiment has an approximate sharp corner shape such as "Λ" in accordance with the positional relationship shown in the drawings, the left part forming the first restriction slope 451 and the right part forming the second restriction slope 452, which restriction can be achieved when the first restriction slope 451 abuts against the first restriction groove wall 331 and the second restriction slope 452 abuts against the second restriction groove wall 332, respectively.The operation of the contact control mechanism is as follows:As shown in FIG. 5, in the initial state, the slider 40 is in the initial position (i.e., the reset position), and the movable spring 50 drives the movable contact 51 and the fixed contact 52 to remain closed.As shown in FIG. 6, during the forced opening process, the push rod 20 moves downward, driving the first control portion 21 and the second control portion 22 to move them downward synchronously until the first control portion 21 and the control end 41 of the slide gear 40 abut each other; the push rod 20 moves downward further and pushes the slide gear 40 to slide along the slide groove 32 until the drive end 42 of the slide gear 40 abuts against the movable spring 50; the push rod 20 moves downward further and pushes the slide gear 40 to slide along the slide groove 32, the drive end 42 of the slide gear 40 pushes the movable spring 50 and slides to the forced opening position, forcing the movable spring 50 to elastically deform and drive the movable contact 51 to separate it from the fixed contact 52.As shown in FIG. 7, it is assumed that the movable spring 50 cannot push the slide gear 40 upward during the returning process of the push rod 20, i.e., after the first control portion 21 is separated from the control end 41 of the slide gear 40, to the returning position (i.e., the initial position) due to the influence of dust by its elastic restoring force along the slide groove 32. While the push rod 20 is being upwardly restored at this time, the second control portion 22 comes into contact with the control end 41 of the slide gear 40; the push rod 20 is further upwardly restored and the slide gear 40 is lifted from the control end 41 of the slide gear 40. The slide wheel 40 rotates with its structural center of gravity as a fulcrum until the arch surface 43 abuts against the slide groove 32 at the location of the driving end 42 of the slide wheel 40 to form a fulcrum; the push rod 20 is further returned upward and the slide wheel 40 rotates about the formed fulcrum, the slide wheel 40 gradually moves away from the slide groove 32 from the end near the control end 41, i.e., is separated from the dust. In the process of moving away, the movable spring 50 further urges the slide gear 40 with the same force, and the frictional force of the slide gear 40 gradually decreases under the sliding tendency. As shown in FIG. 8, until the force applied to the slide gear 40 by the movable spring 50 is larger than the frictional force received by the slide gear 40, the slide gear 40 is urged to slide along the slide groove 32 to the reset position (i.e., the initial position).Based on a similar structure, the restriction support shaft 45 may also be implemented as a structure having a cross section substantially in the shape of a triangle, a fan, or a circle. Similarly, the boundary groove 33 may also be implemented as any groove structure having a first boundary groove wall 331 and a second boundary groove wall 332, and formed into the narrow top and wide bottom structure.Due to the positive opening, the movable spring 50 can form a certain limit for the slider 40 even when the two-point assist limit structure fails, and the movable spring 50 can provide a certain limit effect and prevent the slider 40 from coming off. However, no second limiting structure may be formed during recovery, and therefore, in this embodiment, a bent notch 333 is provided on the second limiting groove wall 332, and the limiting support shaft 45 abuts on the bent notch 333 when abutting on the second limiting groove wall 332. The bent notch 333 can more stably fix the limiting support shaft 45 to the second limiting groove wall 332, which prevents the unintentional slip formed between the limiting support shaft 45 and the second limiting groove wall 332 or due to long-term wear caused by load and then excessive sliding and then being released from the sliding groove 32, which can effectively prevent the failure of the two-point support structure.The second embodimentThis embodiment provides an effective reset switch based on the described contact control mechanism, in which embodiment, as shown in Figs. 9 to 11, two pairs of normally closed contacts and two pairs of normally open contacts are provided. The two pairs of normally closed contacts and the two pairs of normally open contacts are symmetrically disposed on both sides of the contact control mechanism, and the contact control mechanism controls the force opening and the auxiliary return of the normally closed contacts. More specifically, the reset switch includes a housing 30, a spring 60, a spring arm 61, a stationary normally-closed contact spring 62, a movable normally-closed contact spring 63 (i.e., the movable spring 50), a movable normally-closed contact 64 (i.e., the movable contact 51), and a stationary normally-closed contact 65 (i.e., the fixed contact 52), a stationary normally-open contact spring 66, a movable normally-open contact spring 67, a movable normally-open contact 68, a stationary normally-open contact 69, a support frame 70, and the contact control mechanism. The slide bed 31 and the housing 30 have an integrated structure. The movable normally-closed contact spring 63 and the movable normally-open contact spring 67 constitute a linkage mechanism through the support frame 70, and the push rod 20 is upwardly restored by the spring 60. As shown in FIG. 12, the part of the restricting groove 33 corresponding to the restricting support shaft 45 of the slider 40 is opened on the inner wall of the housing 30.During operation, the driving end 42 of the slide gear 40 drives the movable contact 51 and the fixed contact 52 to be opened, and the movable contact 51 and the fixed contact 52 are closed after the second control portion 22 controls the slide gear 40 to reset it. In this embodiment, the contact control mechanism acts on the movable normally-closed contact spring 63 (i.e., the movable spring 50) to drive the movable normally-closed contact 64 (i.e., the movable contact 51) to separate from the fixed normally-closed contact 65 (i.e., the fixed point 52), the switch is opened, i.e., by controlling the contacts of the movable normally-closed contact spring 63 (i.e., the movable spring 50) and the fixed normally-closed contact spring 62 to be forcibly opened, the movable normally-open contact spring 67 is controlled to move and drive the movable normally-open contact 68 and the fixed normally-open contact 69 of the fixed normally-open contact spring 66 to close.In the switch open state, the elastic restoring force of the movable normally-contact spring 63 (i.e., the movable spring 50) cannot press the slide gear 40 of the contact control mechanism under the influence of the dust to be restored, the second control portion 22 of the contact control mechanism acts on the slide gear 40, the slide gear 40 is removed from the slide groove 32, and the frictional force acting on the slide gear 40 is reduced. That is, by helping the movable normally-open contact spring 63 press the slide wheel 40 to restore it, the movable normally-open contact spring 63 moves, which in turn drives the movable normally-open contact spring 67 and further drives the normally-open contact 68 and the stationary normally-open contact 69 of the stationary normally-open contact spring 66 to open.When the contact control mechanism described in the present disclosure is implemented in other electrical devices such as switches, circuit breakers, laterally mounted contacts, etc., which are provided with contact mechanisms and can be switched between open and closed states, adaptive structure settings can be made based on the structure and operation of the contact control mechanism to realize the force control and the effective reset of the contact mechanism.

Claims

An effective reset contact control mechanism comprising: a slide wheel (40), a slide bed (31), and a first control portion (21), the slide bed (31) being provided with a slide groove (32), the slide wheel (40) being disposed on the slide groove (32), the first control portion (21) being configured to cooperate with a control end (41) of the slide wheel (40), characterized in that the reset contact control mechanism further comprises: a second control portion (22), the control end (41) of the slide wheel (40) being located between the first control portion (21) and the second control portion (22); wherein the sliding wheel (40) is configured to move away from the sliding groove (32) during the movement of the control end (41) of the sliding wheel (40) driven by the second control section (22), such that the frictional force on the sliding wheel (40) is reduced.The effective reset contact control mechanism according to claim 1, characterized by further comprising: a push rod (20), wherein the first control portion (21) and the second control portion (22) are disposed at locations at different heights along a height direction of the push rod (20).The effective return contact control mechanism according to claim 2, characterized in that the slide wheel (40) has an approximately semicircular structure, the slide wheel (40) and the slide groove (32) of the slide bed (31) being adapted to be curved.The effective return contact control mechanism according to claim 1, characterized in that the control end (41) of the slider (40) is formed by arranging an escape space (44) toward the second control portion (22).The effective reset contact control mechanism according to claim 1, characterized in that the driving end (42) of the slide wheel (40) abuts against the slide groove (32) and forms a fulcrum during the movement of the control end (41) of the slide wheel (40) driven by the second control portion (22), the slide wheel (40) being configured to rotate about the fulcrum and move away from the slide groove (32).The effective return contact control mechanism according to claim 5, characterized in that one side of the slide gear (40) is provided with a restriction support shaft (45), and that a restriction groove (33) corresponding to the restriction support shaft (45) is provided, and that the restriction support shaft (45) is disposed in the restriction groove (33); wherein during the rotation of the slide gear (40), a rotation restriction is formed when the restriction support shaft (45) abuts against a restriction groove wall (331, 332) of the restriction groove (33).The effective return contact control mechanism according to claim 6, characterized in that the restriction support shaft (45) is configured to abut against the restriction groove wall (331, 332) of the restriction groove (33) to form a first support point during rotation of the slider (40), and the slider (40) is configured to abut against the slider groove (32) to form a second support point, wherein the rotation restriction is formed by a two-point support.The effective return contact control mechanism according to claim 7, characterized in that a cross section of the restriction support shaft (45) has an approximate shape of a sharp corner, a triangle, a fan, or a circle.The effective reset contact control mechanism according to any one of claims 6 to 8, characterized in that the limiting groove (33) includes a first limiting groove wall (331) toward the driving end (42) and a second limiting groove wall (332) toward the controlling end (41), wherein a distance between one end of the first limiting groove wall (331) and one end of the second limiting groove wall (332), the two ends facing the sliding groove (32), is greater than a distance between the other two ends.An effective reset switch characterized by comprising: a housing (30), a movable spring (50), a movable contact (51), a fixed contact (52), and a reset contact control mechanism according to any one of claims 1 to 9, wherein the reset contact control mechanism is configured to act on the movable spring (50) to drive the movable contact (51) to move; wherein the first control portion (21) of the contact control mechanism is configured to act on the slide gear (40), wherein the slide gear (40) is removed from a slide groove (32), and the frictional force acting on the slide gear (40) is reduced when the elastic reset force of the movable spring (50) cannot press a slide gear (40) of the contact control mechanism to reset it.The effective reset switch according to claim 10, characterized in that a part of the limiting groove (33) corresponding to a limiting support shaft (45) of the slider (40) is opened on an inner wall of the housing (30); a driving end (42) of the slider (40) is configured to drive the movable contact (51) and the fixed contact (52) to be opened, the movable contact (51) and the fixed contact (52) being closed after a second control portion (22) controls the slider (40) to reset it.

Images