CN201134365Y

CN201134365Y - Electric switch

Info

Publication number: CN201134365Y
Application number: CNU2007201830965U
Authority: CN
Inventors: 李容威; 李文载
Original assignee: ZHEJIANG KACON ELECTRIC CO Ltd
Current assignee: ZHEJIANG KACON ELECTRIC CO Ltd
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2008-10-15
Anticipated expiration: 2017-11-02

Abstract

The utility model discloses an electric switch which comprises a base, an NC static contact, an NO static contact, a movable contact, a push rod assembly part, a return spring resetting the push rod assembly part, a protecting cover and a binding screw. The push rod assembly part comprises a pressing handle, a push rod and an action spring plate, wherein one end of the action spring plate is arranged on the push rod and the other end is arranged on the movable contact. The electric switch is characterized in that the electric switch further comprises a forced open-circuit part arranged in the base and capable of rotating by a certain angle, the push rod assembly part further comprises a pushing rod for pushing the forced open-circuit part to rotate, and the forced open-circuit part comprises a roll shaft, a forced open-circuit pushing block for forcibly pushing the movable contact and a stressed bar for being pushed by the pushing rod. The electric switch has the advantage that although the NC static contact and the movable contact are welded to be stuck together, the movable contact can be forcibly pushed away from the NC static contact for continual use.

Description

Electric switch

Technical field

The utility model belongs to the electric switch technical field.

Background technology

At present, a kind of electric switch on the market comprises pedestal, NC fixed contact, NO fixed contact, moving contact, push bar assembly, back-moving spring, protective cover and terminal screw that push bar assembly is resetted; Described push bar assembly comprises that press handle, push rod and an end are arranged on push rod and the other end and are arranged on action shell fragment on the moving contact; Be used to make moving contact to remove and be electrically connected, even also NC fixed contact and moving contact switch to the loop off-state by the loop on-state with the NO fixed contact from the NC fixed contact.NC fixed contact in this kind electric switch and moving contact often stick together because of melting welding takes place for switch on for a long time connection or overload, the elastic force deficiency of action shell fragment causes this kind malfunctioning switch, can't continue to use so that NC fixed contact and moving contact switch to the loop off-state by the loop on-state; Thereby functional reliability and fail safe are very low, can't satisfy client's needs.

The utility model content

Stick together even the purpose of this utility model is to provide a kind of NC fixed contact and moving contact generation melting welding, also moving contact can be forced to push open and the electric switch that continues to use from the NC fixed contact.

The technical scheme that realizes the utility model purpose is: a kind of electric switch comprises pedestal, NC fixed contact, NO fixed contact, moving contact, push bar assembly, back-moving spring, protective cover and terminal screw that push bar assembly is resetted; Described push bar assembly comprises that press handle, push rod and an end are arranged on push rod and the other end and are arranged on action shell fragment on the moving contact; Its design feature is: also comprise the pressure open circuit part that is arranged on the rotatable certain angle in the pedestal; Described push bar assembly also comprises the catch bar that the part that is used to promote to force to open a way rotates; Described pressure open circuit part comprises roll shaft, is used to force to promote the pressure open circuit pushing block of moving contact and be used to be pushed the force rod that bar promotes.

The catch bar of described push bar assembly is fixedly installed on the press handle.

The roll shaft setting of described pressure open circuit part is forced open circuit pushing block portion disposed thereon in the middle, and force rod is arranged on its underpart.

The centre of described force rod is provided with groove.

The utlity model has positive effect:

(1) the utility model is by add forcing impeller in traditional electric switch, and adds the catch bar that the part that is used to promote to force to open a way rotates in push bar assembly; Thereby make this electric switch each time push push bar assembly the time, catch bar can promote to force the open circuit part to turn an angle, make and force the open circuit part to promote moving contact by force, it is removed from the NC fixed contact, thereby stick together even have NC fixed contact and moving contact generation melting welding, also moving contact can be forced to push open and the advantage that continues to use from the NC fixed contact.

Description of drawings

Fig. 1 is the structural representation of a kind of decomposing state of the present utility model;

Fig. 2 is a kind of perspective view of press handle in the electric switch shown in Figure 1;

The perspective view that Fig. 3 is a press handle shown in Figure 2 when another angle is observed;

Fig. 4 is the plan view of press handle shown in Figure 2 when observing from the side;

Fig. 5 is a kind of perspective view of forcing the open circuit part in the electric switch shown in Figure 1;

The perspective view that Fig. 6 is a pressure shown in Figure 5 open circuit part when another angle is observed;

Fig. 7 is the working state schematic representation of electric switch shown in Figure 1 when not pressing press handle;

Fig. 8 is the working state schematic representation of electric switch shown in Figure 1 when just having promoted to force the open circuit part to rotate after pressing press handle;

Fig. 9 be electric switch shown in Figure 1 after pressing press handle, promote to force the open circuit part turn an angle the back, make working state schematic representation when the NC fixed contact separates with the moving contact pressure.

Reference numeral is: pedestal 1, NC fixed contact 2, NO fixed contact 3, moving contact 4, push rod combination 5, press handle 51, push rod 52, action shell fragment 53, catch bar 54, groove 541, the piece 7 of forcing to open a way, roll shaft 71, pressure open circuit pushing block 72, force rod 73, groove 731, back-moving spring 8, protective cover 9, terminal screw 10.

Embodiment

(embodiment 1)

Fig. 1 to Fig. 9 has shown a kind of execution mode of the present utility model, and wherein Fig. 1 is the structural representation of a kind of decomposing state of the present utility model; Fig. 2 is a kind of perspective view of press handle in the electric switch shown in Figure 1; The perspective view that Fig. 3 is a press handle shown in Figure 2 when another angle is observed; Fig. 4 is the plan view of press handle shown in Figure 2 when observing from the side; Fig. 5 is a kind of perspective view of forcing the open circuit part in the electric switch shown in Figure 1; The perspective view that Fig. 6 is a pressure shown in Figure 5 open circuit part when another angle is observed; Fig. 7 is the working state schematic representation of electric switch shown in Figure 1 when not pressing press handle; Fig. 8 is the working state schematic representation of electric switch shown in Figure 1 when just having promoted to force the open circuit part to rotate after pressing press handle; Fig. 9 makes working state schematic representation when the NC fixed contact separates with the moving contact pressure after electric switch shown in Figure 1 promotes to force the open circuit part to turn an angle after pressing press handle.

Present embodiment is a kind of electric switch, see Fig. 1 to Fig. 9, comprise pedestal 1, NC fixed contact 2, NO fixed contact 3, moving contact 4, push bar assembly 5, be arranged on the pressure open circuit part 7 of the rotatable certain angle in the pedestal 1, back-moving spring 8, protective cover 9 and the terminal screw 10 that push bar assembly 5 is resetted; Described push bar assembly 5 comprises that press handle 51, push rod 52, an end are arranged on push rod 52 and the other end is arranged on the action shell fragment 53 on the moving contact 4 and the catch bar 54 of part 7 rotations that are used to promote force open a way; Described pressure open circuit part 7 comprises roll shaft 71, is used to force to promote the pressure open circuit pushing block 72 of moving contact 4 and be used to be pushed the force rod 73 that bar 54 promotes.The catch bar 54 of described push bar assembly 5 is fixedly installed on the press handle 51.The roll shaft 71 of described pressure open circuit part 7 is provided with in the middle, forces open circuit pushing block 72 portions disposed thereon, and force rod 73 is arranged on its underpart.Cooperate for the ease of installing, the centre of the catch bar 54 in the present embodiment is provided with groove 541, and the centre of described force rod 73 also is provided with groove 731.

The utility model is by add forcing impeller in traditional electric switch, and adds the catch bar that the part that is used to promote to force to open a way rotates in push bar assembly; Thereby make this electric switch each time push push bar assembly the time, catch bar can promote to force the open circuit part to turn an angle, make and force the open circuit part to promote moving contact by force, it is removed from the NC fixed contact, even thereby have NC fixed contact and moving contact generation melting welding and stick together, also moving contact can be forced from the NC fixed contact to push open and the advantage that continues to use, prolong useful life of the present utility model.

Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that connotation of the present utility model extends out and still belong to protection range of the present utility model.

Claims

1, a kind of electric switch comprises pedestal (1), NC fixed contact (2), NO fixed contact (3), moving contact (4), push bar assembly (5), back-moving spring (8), protective cover (9) and terminal screw (10) that push bar assembly (5) is resetted; Described push bar assembly (5) comprises that press handle (51), push rod (52) and an end are arranged on push rod (52) and the other end and are arranged on action shell fragment (53) on the moving contact (4); It is characterized in that: also comprise the pressure open circuit part (7) that is arranged on the rotatable certain angle in the pedestal (1); Described push bar assembly (5) also comprises the catch bar (54) that is used for promoting to force open circuit part (7) rotation; Described pressure open circuit part (7) comprises roll shaft (71), is used for forcing to promote the pressure open circuit pushing block (72) of moving contact (4) and being used to be pushed the force rod (73) that bar (54) promotes.

2, a kind of electric switch according to claim 1 is characterized in that: the catch bar (54) of described push bar assembly (5) is fixedly installed on the press handle (51).

3, a kind of electric switch according to claim 1 is characterized in that: the roll shaft (71) of described pressure open circuit part (7) is provided with in the middle, forces open circuit pushing block (72) portion disposed thereon, and force rod (73) is arranged on its underpart.

4, a kind of electric switch according to claim 3 is characterized in that: the centre of described force rod (73) is provided with groove (731).