EP-4742294-A1 - CONTACT SYSTEM AND ELECTRICAL SWITCHING DEVICE

EP4742294A1EP 4742294 A1EP4742294 A1EP 4742294A1EP-4742294-A1

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular, to a contact system and a switching device including the contact system. The contact system includes a main contact structure and at least one group of movable contact structure; the main contact structure includes a main contact; the main contact includes a main touch portion; the movable contact structure includes a movable contact; the movable contact includes a movable touch portion; when the main contact is located at a closed position, the main touch portion and the movable touch portion are engaged to enable the main contact and the movable contact to be closed; the movable contact structure further includes an elastic member cooperating with the movable contact; and in the disconnection process of the main contact from the movable contact, when the main touch portion drives the movable touch portion to move from an initial position to a disengaged position, the elastic member stores energy, such that the main contact continues to move, and the elastic member releases energy to drive the movable touch portion to reset to the initial position. The contact system and the switching device have high disconnection capacity.

Inventors

LU, Kejun
ZHOU, Zhangqing
GU, Binbin
GE, Weijun
ZHANG, Jiazheng
LI, CHUANG

Assignees

Noark Electrics (Shanghai) Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240703

Claims (15)

A contact system, comprising a main contact structure (m) and at least one group of movable contact structure (s), wherein the main contact structure (m) comprises a main contact (2); the main contact (2) comprises at least one main touch portion (2-0); the movable contact structure (s) comprises a movable contact (4); the movable contact (4) comprises a movable touch portion (4-1); when the main contact (2) is located at a closed position, the main touch portion (2-0) and the movable touch portion (4-1) are engaged to enable the main contact (2) and the movable contact (4) to be closed; the movable contact structure (s) further comprises an elastic member (6) cooperating with the movable contact (4); and in the disconnection process of the main contact (2) from the movable contact (4), when the main touch portion (2-0) drives the movable touch portion (4-1) to move from an initial position to a disengaged position, the elastic member (6) stores energy, such that the main contact (2) continues to move, and the elastic member (6) releases energy to drive the movable touch portion (4-1) to reset to the initial position.
The contact system according to claim 1, wherein the main contact structure (m) is disposed pivotally or disposed to move as a whole.
The contact system according to claim 2, wherein the main contact structure (m) is disposed pivotally and is a rotary contact structure; the main contact (2) is a rotary contact; the main touch portion (2-0) is a rotary touch portion; when the rotary contact is located at a closed position, the rotary touch portion and the movable touch portion (4-1) are engaged to enable the rotary contact and the movable contact (4) to be closed; and in the disconnection process of the rotary contact from the movable contact (4), when the rotary touch portion drives the movable touch portion (4-1) to move from an initial position to a disengaged position, the elastic member (6) stores energy, such that the rotary contact continues to move, the elastic member (6) releases energy to drive the movable touch portion (4-1) to reset to the initial position, and the main touch portion (2-0) and the movable touch portion (4-1) move away from each other.
The contact system according to claim 3, wherein the contact system comprises two groups of movable contact structures (s); the rotary contact comprises two rotary touch portions disposed at both ends thereof respectively; and when the rotary contact is located at the closed position, the two rotary touch portions are respectively engaged with the two movable touch portions (4-1) to enable the rotary contact and the movable contact (4) to be closed.
The contact system according to claim 1, wherein the movable contact (4) is disposed rotatably or disposed to move as a whole.
The contact system according to claim 5, wherein the middle of the movable contact (4) is disposed pivotally; the movable touch portion (4-1) is disposed at one end of the movable contact (4), and the other end of the movable contact (4) cooperates with the elastic member (6); and the movable contact (4) rotates so that the movable touch portion (4-1) is switched between the initial position and the disengaged position.
The contact system according to claim 5, wherein the movable contact (4) moves as a whole within a preset plane, and the movable contact (4) moves as a whole so that the movable touch portion (4-1) is switched between the initial position and the disengaged position.
The contact system according to claim 7, wherein the movable contact structure (s) further comprises a guide rail structure (g), and the movable contact (4) is disposed to move as a whole along an extension direction of the guide rail structure (g).
The contact system according to claim 8, wherein the movable contact structure (s) further comprises a movable contact shaft (5) which is disposed fixedly; the movable contact (4) comprises a guide plate (4-4); a guide rail structure (g) comprises guide rail walls (1-2) and a guide rail groove (1-1) formed between two opposite guide rail walls (1-2); the movable contact shaft (5) is slidably plugged into the guide rail groove (1-1); and the guide plate (4-4) and the movable contact shaft (5) are disposed on both sides of one guide rail wall (1-2), respectively.
The contact system according to claim 9, wherein the movable contact shaft (5) and the guide plate (4-4) make sliding contact with both sides of the corresponding guide rail wall (1-2), respectively.
The contact system according to claim 3, wherein the rotary contact structure further comprises a rotating shaft (3) which is disposed pivotally; the rotary contact is plugged into the rotating shaft (3), and both ends of the rotary contact protrude from both radial sides of the rotating shaft (3), respectively; and the two groups of movable contact structures (s) are mutually centrosymmetric structures with a rotation center of the rotary contact structure as a symmetry center.
The contact system according to claim 1, wherein the main touch portion (2-0) makes plug-in fit with the movable touch portion (4-1), such that the main contact structure (m) and the movable contact structure (s) are closed.
The contact system according to claim 12, wherein the contact system further comprises at least one group of plug-in structure; the plug-in structure comprises a plug-in plate and a socket (c), one of which is disposed on the main touch portion (2-0) and the other is disposed on the movable touch portion (4-1); and the plug-in plate is plugged into the socket (c) and is clamped by an inner side wall of the socket (c), such that the main touch portion (2-0) and the movable touch portion (4-1) are engaged.
The contact system according to claim 3, wherein the rotary contact structure further comprises a rotating shaft (3) which is disposed to rotate around its own axis; the rotating shaft (3) comprises a rotating shaft seat (31) and a rotating shaft cover (33) which are spliced oppositely in its axial direction; the rotating contact is clamped between the rotating shaft seat (31) and the rotating shaft cover (33) and comprises rotary touch portions which are disposed on both radial sides of the rotating shaft (3) and cooperate with the movable contact (4); the rotating shaft (3) further comprises a plug portion (3p) disposed at its axial end; the plug portion (3p) comprises a main plug (33-2) and a secondary plug (31-1); the main plug (33-2) is disposed on one side of the rotating shaft cover (33) away from the rotating shaft seat (31); the secondary plug (31-1) is disposed on one side of the rotating shaft seat (31) facing the rotating shaft cover (33); the secondary plug (31-1) passes through a rotating shaft cover hole (33-1) of the rotating shaft cover (33) and is disposed side by side with the main plug (33-2); the rotating shaft (3) further comprises a jack portion (3g) disposed at its other axial end; and the jack portion (3g) is adapted to the plug portion (3p).
A switching device, the switching device comprising the contact system according to any one of claims 1 to 14.

Description

The present application claims priority to Chinese Patent Application No. 202310823656.2 filed on July 6, 2023, and Chinese Patent Application No. 202321758907.5 filed on July 6, 2023, both of which are incorporated herein by reference in their entireties. TECHNICAL FIELD The present invention relates to the field of low-voltage electrical appliances, and more particularly, to a contact system and a switching device including the contact system. BACKGROUND A contact system of the existing switching device is mostly implemented by the cooperation of a movable contact and a static contact. The movable contact rotates or moves as a whole to be closed with and disconnected from the static contact, such that a circuit where the switching device is located is turned on and off. The disconnection speed of the movable and static contacts is an important factor affecting the disconnection capacity of the contact system. At present, an energy storage mode of an operating mechanism is mostly used to increase a movement speed of the movable contact, thereby increasing the disconnection speed of the movable and static contact, but the effect is relatively poor due to the limited structural strength and space. SUMMARY An object of the present invention is to overcome at least one defect of the prior art and provide a contact system and a switching device, which have high disconnection capacity. In order to achieve the above objective, the present invention provides the following technical solution: a contact system, comprising a main contact structure and at least one group of movable contact structure, the main contact structure comprises a main contact; the main contact comprises at least one main touch portion; the movable contact structure comprises a movable contact; the movable contact comprises a movable touch portion; when the main contact is located at a closed position, the main touch portion and the movable touch portion are engaged to enable the main contact and the movable contact to be closed;the movable contact structure further comprises an elastic member cooperating with the movable contact; andin the disconnection process of the main contact from the movable contact, when the main touch portion drives the movable touch portion to move from an initial position to a disengaged position, the elastic member stores energy, such that the main contact continues to move, and the elastic member releases energy to drive the movable touch portion to reset to the initial position. Further, the main contact structure is disposed pivotally or disposed to move as a whole. Further, the main contact structure is disposed pivotally and is a rotary contact structure; the main contact is a rotary contact; the main touch portion is a rotary touch portion; when the rotary contact is located at a closed position, the rotary touch portion and the movable touch portion are engaged to enable the rotary contact and the movable contact to be closed; and in the disconnection process of the rotary contact from the movable contact, when the rotary touch portion drives the movable touch portion to move from an initial position to a disengaged position, the elastic member stores energy, such that the rotary contact continues to move, the elastic member releases energy to drive the movable touch portion to reset to the initial position, and the main touch portion and the movable touch portion move away from each other. Further, the contact system comprises two groups of movable contact structures; the rotary contact comprises two rotary touch portions disposed at both ends thereof respectively; and when the rotary contact is located at the closed position, the two rotary touch portions are respectively engaged with the two movable touch portions to enable the rotary contact and the movable contact to be closed. Further, the movable contact is disposed rotatably or disposed to move as a whole. Further, the middle of the movable contact is disposed pivotally; the movable touch portion is disposed at one end of the movable contact, and the other end of the movable contact cooperates with the elastic member; and the movable contact rotates so that the movable touch portion is switched between the initial position and the disengaged position. Further, the movable contact moves as a whole within a preset plane, and the movable contact moves as a whole so that the movable touch portion is switched between the initial position and the disengaged position. Further, the movable contact structure further comprises a guide rail structure, and the movable contact is disposed to move as a whole along an extension direction of the guide rail structure. Further, the movable contact structure further comprises a movable contact shaft which is disposed fixedly; the movable contact comprises a guide plate; a guide rail structure comprises guide rail walls and a guide rail groove formed between two opposite guide rail walls; the movable contact shaft is sl