CN2660679Y - Overload protector of safety switch - Google Patents
Overload protector of safety switch Download PDFInfo
- Publication number
- CN2660679Y CN2660679Y CN 200320118288 CN200320118288U CN2660679Y CN 2660679 Y CN2660679 Y CN 2660679Y CN 200320118288 CN200320118288 CN 200320118288 CN 200320118288 U CN200320118288 U CN 200320118288U CN 2660679 Y CN2660679 Y CN 2660679Y
- Authority
- CN
- China
- Prior art keywords
- bimetal leaf
- pieces
- double metal
- pedestal
- safety switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- Thermally Actuated Switches (AREA)
Abstract
The utility model relates to an overload protective device designed for a security switch. A lug pressed on the moving contact on the double metal-pieces (upon conduction) is arranged on the switching button of the security switch; a pedestal is planted between the two base pins of the security switch; a protruding part extending out of the main body and sticking against the double metal-pieces under conduction state is arranged on the pedestal; when over-current causes the temperature of the double metal-pieces to increase, the protruding part generates a reactive force to make the double metal-pieces bounce rapidly; as a result, the rebounding force and sensitivity of the double metal-pieces are increased.
Description
[technical field]
The utility model is a kind of overload protection arrangement of safety switch, is the parts design that belongs to appliance switch.
[background technology]
In order to prevent electric appliance load excessive and damage; therefore; generally on appliance switch, can be provided with overload protection arrangement; its principle is by the bimetal leaf of the thermal coefficient of expansion difference shell fragment as movable contact; when the button of push switch is conducting state; by button compacting the movable contact on the bimetal leaf is contacted and conducting with fixed contact on the switch pin; when pressing keys is off-state; promptly can be with bimetal leaf drawing and make movable contact break away from fixed contact and form and open circuit up; again; when the excessive situation of load but takes place in switch under conducting state; bimetal leaf is temperature distortion and make movable contact break away from fixed contact to form and open circuit, damage to avoid electrical equipment.Yet because bimetal leaf must reach certain value at overload current, when making the temperature of bimetal leaf reach the critical value of distortion, bimetal leaf can flick, so bimetal leaf is not very sensitive.
[summary of the invention]
In order to improve above-mentioned disappearance, the main purpose of the utility model is to provide the power that a kind of bimetal leaf that can improve safety switch flicks and the overload protection arrangement of sensitivity.
Based on above-mentioned purpose; the major technique means of the utility model are to provide a kind of overload protection arrangement of safety switch; lie in the pedestal of planting between two pins of safety switch; this pedestal is provided with and is stretched on body interior and supports the teat that reaches bimetal leaf when conducting state, presses on the projection of the movable contact that is located at bimetal leaf in addition when the switch bar of safety switch is provided with conducting.
By above-mentioned technological means, under conducting state, teat lies in and forms a fulcrum on the bimetal leaf, and the temperature of bimetal leaf is raise when rebounding, teat promptly forms a reaction force rebounds bimetal leaf fast, improves bimetal leaf bounce-back power and sensitivity by this.
[description of drawings]
(1) graphic part
Fig. 1 is the three-dimensional appearance schematic diagram of the utility model.
Fig. 2 is the three-dimensional appearance decomposing schematic representation of the utility model.
Fig. 3 is that the utility model switches to the plane generalized section when opening circuit.
Fig. 4 is the plane generalized section of the utility model when switching to conducting.
(2) assembly conventional letter
(10) body (11) storage tank
(110) slot (20) first pins
(201) fixed contact (21) second pins
(211) bimetal leaf (212) movable contact
(30) switch key (31) projection
(40) hook sheet (50) pedestal
(51) teat
[embodiment]
See also Fig. 1, shown in Figure 2, the safety switch of the utility model enforcement, its basic kenel and existing product are similar, that is be provided with a body (10), form a storage tank (11) within the body (10), wherein side in storage tank (11) is pivoted with switch key (30), opposite side is plugged with first pin (20) at two intervals, second pin (21), wherein first pin (20) is provided with a fixed contact (201), on second pin (21) then in conjunction with the bimetal leaf (211) of temperature distortion bending for a moment, this bimetal leaf (211) free end is provided with a movable contact (212) that is correspondingly positioned at fixed contact (201) top, a wherein end of switch key (30) is provided with one towards the prominent projection (31) of establishing of movable contact (212), in the wherein side of projection (31) the hook sheet (40) that is pivoted, the free end of this hook sheet (40) is that hook is located at bimetal leaf (211) and is provided with this end of movable contact (212) as shown in Figure 3, when switching switch key (30) is off state, promptly by hook sheet (40) with bimetal leaf (211) free end together with movable contact (212) drawing up, make last movable contact (212) of bimetal leaf (211) and fixed contact (201) break away to form and open circuit.
And when pushing switch key (30) for conducting state as shown in Figure 4, projection (31) the pushing and pressing movable contact (212) that system goes up by switch key (30), and press on movable contact (212) apical margin, when circuit overloads raises bimetal leaf (211) temperature, bimetal leaf (211) promptly can up rebound, and then pushing and pressing projections (31) become off state shown in Figure 3 together with switch key (30) beat.
Please consult Fig. 2 again, shown in Figure 4, in order to make bimetal leaf (211) have higher bounce-back power, and improve its sensitivity, special boundary is arranged with a slot (110) on the body (10) between first pin (20) and second pin (21), this slot (110) and communicate with accommodation chamber (11), be inserted in the slot (110) for a pedestal (50), this pedestal (50) is gone up and is provided with and is stretched on the interior teat (51) of accommodation chamber (11), system is illustrated in figure 4 as conducting state when safety switch, that is the projection (31) of switch key (30) is suppressed when movable contact (212), this bimetal leaf (211) stage casing system slightly is subjected to the ejection of the teat (51) of pedestal (50), and make teat (51) formation one be resisted against the fulcrum of bimetal leaf (211), when making the temperature raising desire bounce-back of bimetal leaf (211) when current overload, promptly go up and form a reaction force in this teat (51), bimetal leaf (211) is quicked rebound, and, it promptly flicks before tying up to bimetal leaf (211) critical strain temperature, so can improve the sensitivity of bimetal leaf (211), to improve the safe in utilization of electrical equipment.
Claims (1)
1, a kind of overload protection arrangement of safety switch; lie in the pedestal of planting between two pins of safety switch; it is characterized in that this pedestal is provided with is stretched on body interior and supports when conducting state and the teat of bimetal leaf, presses on the projection of the movable contact that is located at bimetal leaf in addition when the switch bar of safety switch is provided with conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118288 CN2660679Y (en) | 2003-11-20 | 2003-11-20 | Overload protector of safety switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118288 CN2660679Y (en) | 2003-11-20 | 2003-11-20 | Overload protector of safety switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2660679Y true CN2660679Y (en) | 2004-12-01 |
Family
ID=34347224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320118288 Ceased CN2660679Y (en) | 2003-11-20 | 2003-11-20 | Overload protector of safety switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2660679Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620943B (en) * | 2009-05-25 | 2012-12-05 | 富阳瑞泰机电有限公司 | Switch button structure |
-
2003
- 2003-11-20 CN CN 200320118288 patent/CN2660679Y/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620943B (en) * | 2009-05-25 | 2012-12-05 | 富阳瑞泰机电有限公司 | Switch button structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20110802 Decision number of declaring invalidation: 17003 Granted publication date: 20041201 |