CN2881942Y

CN2881942Y - Overload short-circuit protection switch

Info

Publication number: CN2881942Y
Application number: CN 200620002147
Authority: CN
Inventors: 张金丽
Original assignee: YUEQING DONGKE ELECTRON CO Ltd
Current assignee: YUEQING DONGKE ELECTRON CO Ltd
Priority date: 2006-02-07
Filing date: 2006-02-07
Publication date: 2007-03-21
Anticipated expiration: 2016-02-07

Abstract

The utility model discloses an overload short-circuit protecting switch. Pressing a handle [1] will drive the upper movable contact [6] of the movable contact [7] to contact with the upper fixed contact [9] of the fixed contact [8]. When a power consumer protected is overloaded or short circuited, a bimetal leaf [14] is heated and deforms, and pushes a slider [15] to make a movable contact holder [3] rebound by action of a movable-contact-holder-pressing spring [5], so that the movable contact and the fixed contact are off immediately, which cuts off power supply and protects the power consumer. The utility model is applicable for overload and short-circuit protection of small power generators, motors, power distribution lines and illumination lines.

Description

A kind of overload protective switch of the short circuit

Technical field

The utility model relates to a kind of appliance switch, relates to the protection switch of a kind of the utility model title GZ-06 overcurrent protection switch overload, short circuit or rather, belongs to appliance switch

Technical field.

Background technology

At present, mainly there is following defective in similar overcurrent protection switch on the market:

1, because unreasonable structure causes temperature rise, useful life is short;

2, drop-away time is inaccurate, and error is big;

3, use the rated current scope little;

4, anti-mechanical oscillation ability is poor, occurs hit easily.

Summary of the invention

The purpose of this utility model is exactly at the deficiencies in the prior art, solves the defective that exists in the above-mentioned prior art, thereby proposes a kind of overload protective switch of the short circuit.

The purpose of this utility model is to be achieved by following technical proposals.

This switch comprises handle, base, action contact frame and action contact frame stage clip, moving contact and moving contact stage clip, fixed contact, bimetal leaf, slide block and slide block stage clip, cover plate, tarpaulin and waterproof frame etc.

Action contact frame 3 is installed in base 2 tops, is fixedlyed connected by nut 21 with handle 1; Action contact frame stage clip 5 and moving contact stage clip 4 upper ends are inlaid in respectively in the spring groove of action contact frame 3, fixedly connected with support 12 by rivet in the lower end that moving contact 7 is contained in moving contact stage clip 4 and action contact frame stage clip 5; Fixed contact 9 and stationary contact 10 are contained in the bottom of base 2 respectively, and fixed contact 9 is positioned at the below of moving contact 7, and fixed contact 10 is fixedlyed connected by rivet 11 with bimetal leaf 14 lower ends; Slide block 15 is placed in bimetal leaf 14 upper ends, and screw 17 is fixedly connected by adjusting, and slide block stage clip 16 is pressed on a side of slide block 15; Cover cover plate 18, put tarpaulin 19 and waterproof frame 20.

Bimetal leaf 14 described in the utility model is designed to the U-shaped structure, and is highly sensitive.

Trip gear described in the utility model adopts the break-make of slide block 15 and action contact frame 3 interlock control switchs.

Anti-mechanical oscillation described in the utility model are revolved structure of contact terminal and have been adopted moving contact 7 to be connected with support 12 by rivet 13.

The utility model compared with prior art, its advantage is:

1. bimetal leaf is designed to U-shaped, and is simple in structure, highly sensitive;

2. wide region tunable arrangement has improved the use rated current of switch greatly;

3. anti-mechanical oscillation rotary contact structure can prevent effectively that anti-mechanical oscillation ability is strong because of mechanical oscillation cause the mistake break-make.

Description of drawings: below in conjunction with the drawings and specific embodiments the utility model is made further essence and state.

Fig. 1 is the utility model generalized section;

Fig. 2 is the utility model side-looking assembling schematic diagram;

Fig. 3 is Fig. 2 A-A generalized section.

Embodiment:

As described in Figure 1; a kind of overload protective switch of the short circuit described in the utility model; it is by handle 1; base 2, compositions such as action contact frame 3 and action contact frame stage clip 5, moving contact 7 and moving contact stage clip 4, fixed contact, support 12, bimetal leaf 14, slide block 15 and slide block stage clip 16, cover plate 18, tarpaulin 19 and waterproof frame 20.Action contact frame 3 is installed in base 2 tops, fixedlys connected by nut 21 with handle 1.Action contact frame stage clip 5 and moving contact stage clip 4 upper ends embed respectively in the spring groove of action contact frame 3, and moving contact 7 is installed in the lower end of moving contact stage clip 4 and action contact frame stage clip 5, fixedly connected with support 12 by rivet 13.Fixed contact 9 and fixed contact 10 are installed in the bottom of base 2 respectively, and fixed contact 9 is positioned at the below of moving contact 7, and fixed contact 10 is fixedlyed connected by rivet 11 with bimetal leaf 14 lower ends.Slide block 15 is placed in bimetal leaf 14 upper ends, and fixedly connected by adjusting screw 17, slide block stage clip 16 is pressed on slide block 15 1 sides.Shown in Fig. 2,3, cover cover plate 18, put tarpaulin 19 and capillary groove 20.

Operation principle of the present utility model is: press lower handle 1, moving contact 6 contacts conducting with fixed contact 9 upper static contacts 8 on the drive moving contact 7; When abnormal conditions such as power consumption equipment appearance overload of being protected or short circuit; bimetal leaf 14 temperature distortions promote slide block 15 and make action contact frame 3 be subjected to action contact frame stage clip 5 effects bounce-back down, thereby moving contact 6 and fixed contact 9 are disconnected rapidly; cut off the electricity supply, thus protective circuit safety.

Overcurrent protection switch described in the utility model is specially adapted to the overload protective switch of the short circuit of various small generators, motor, distribution line and illuminating line etc.

Claims

1, a kind of overload protective switch of the short circuit is characterized in that: comprise handle, base, action contact frame and action contact frame stage clip, moving contact and moving contact stage clip, fixed contact, support, bimetal leaf; Slide block and slide block stage clip, cover plate, tarpaulin and waterproof frame; Action contact frame [3] is installed in base [2] top, fixedly connected by nut [21] with handle [1], action contact frame stage clip [5] and moving contact stage clip [4] upper end are inlaid in respectively in the spring groove of action contact frame [3], moving contact [7] is contained in the lower end of moving contact stage clip [4] and action contact frame stage clip [5], fixedlys connected with support [12] by rivet [13]; Fixed contact [9] and fixed contact [10] are contained in the bottom of base [2] respectively, and fixed contact [9] is positioned at the below of moving contact [7], and fixed contact [10] is fixedlyed connected by rivet [11] with bimetal leaf [14] lower end; Slide block [15] is placed in bimetal leaf [14] upper end, and screw [17] is fixedly connected by adjusting, and slide block stage clip [16] is pressed on a side of slide block [15]; Cover cover plate [18], put tarpaulin [19] and waterproof frame [20].

2, according to the described a kind of overload protective switch of the short circuit of claim, it is characterized in that: bimetal leaf [14] is the U-shaped structure.

3, a kind of overload protective switch of the short circuit according to claim 1 is characterized in that: trip gear adopts the break-make of a slide block [15] and action contact frame [a 3] interlock control switch.

4, a kind of overload protective switch of the short circuit according to claim 1 is characterized in that: anti-mechanism vibrations rotary contact structure has adopted moving contact [7] to be connected with support [12] by rivet [13].