CN106847616B - A kind of self-locking power-off delay protection device - Google Patents
A kind of self-locking power-off delay protection device Download PDFInfo
- Publication number
- CN106847616B CN106847616B CN201710208524.3A CN201710208524A CN106847616B CN 106847616 B CN106847616 B CN 106847616B CN 201710208524 A CN201710208524 A CN 201710208524A CN 106847616 B CN106847616 B CN 106847616B
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- Prior art keywords
- plate
- thrermostatic bimetal
- contact
- self
- protection device
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/12—Means for adjustment of "on" or "off" operating temperature
- H01H37/26—Means for adjustment of "on" or "off" operating temperature by adjustment of abutment for "off" position of the movable contact
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention discloses a kind of self-locking power-off delay protection devices in electric elements field, including shell open at one end, overcurrent and overheating protection component is provided in shell, the end of overcurrent and overheating protection component is connected with two line conductors stretched out from opening, the sealed glue sealing of the opening of shell, overcurrent and overheating protection component includes the static contact being mounted in insulating supporting seat, movable contact spring and thrermostatic bimetal-plate, it is opened up on insulating supporting seat fluted, the PTC ceramics heating block being connected with static contact is provided in groove, U-type groove is offered in the middle part of thrermostatic bimetal-plate, so that the middle part of thrermostatic bimetal-plate forms spatula, the heated rear both ends of thrermostatic bimetal-plate are flipped up deformation and movable contact are made to be detached from stationary contact, spatula moves downward conflict on PTC ceramics heating block simultaneously, the present invention is generated heat by the way that PTC ceramics is arranged in shell Block cooperates the spatula in the middle part of thrermostatic bimetal-plate, improves the reliability when work of power-off delay protection device, can be used for needing motor, in electric appliance.
Description
Technical field
The present invention relates to a kind of overheat protector, in particular to a kind of bimetal leaf overheat protector.
Background technique
Overheat protector is designed using bimetal leaf overcurrent in the prior art, when the temperature of thrermostatic bimetal-plate is more than triggering
When temperature, deformation occurs for thermo bimetal's sector-meeting, so that disconnecting circuit, completes protection, disadvantage is that, since power-off can be led
Pyrogenicity bimetal leaf environment temperature reduces, so that thrermostatic bimetal-plate will continue to connect circuit when temperature drops to reset temperature,
So that there are some potential safety problemss for circuit, and cause the waste of electric energy.
Summary of the invention
The object of the present invention is to provide a kind of self-locking power-off delay protection device, guarantees its power-off protection effect, improve it
The safety used.
The object of the present invention is achieved like this: a kind of self-locking power-off delay protection device, including shell open at one end,
Overcurrent and overheating protection component is provided in the shell, the end of the overcurrent and overheating protection component is connected with from opening stretching
Two line conductors, the sealed glue sealing of the opening of the shell, and seal cavity is formed, the overcurrent and overheating protection component includes peace
Static contact, movable contact spring and thrermostatic bimetal-plate in insulating supporting seat, one end of the static contact are connected with conducting wire, stationary contact
Stationary contact is fixed on the other end of piece, one end of the movable contact spring is connected with conducting wire, and the other end of movable contact spring and the heat are double
One end of sheet metal is fixedly connected, and the other end of thrermostatic bimetal-plate is fixed with the movable contact with stationary contact cooperation；The insulation branch
It opens up fluted on support seat, the PTC ceramics heating block being connected with static contact is provided in the groove, the thrermostatic bimetal-plate
Middle part offers U-type groove, so that the middle part of thrermostatic bimetal-plate forms spatula, both ends are to turning over after the thrermostatic bimetal-plate is heated
Turning deformation makes movable contact be detached from stationary contact, while spatula moves downward conflict on PTC ceramics heating block.
When the invention works, the electric current in major loop flows through conducting wire → movable contact spring → thrermostatic bimetal-plate → movable contact → stationary contact
Point → static contact → conducting wire, the temperature of hull outside can be made by forming completion circuit at this time with the raising of ambient temperature
Internal thrermostatic bimetal-plate is passed to, when temperature reaches thrermostatic bimetal-plate triggering temperature, deformation occurs for thrermostatic bimetal-plate, so that
Both ends are flipped up, since one end of thermo bimetal is fixed in insulating supporting seat, so that one end of fixed movable contact is de-
From stationary contact, major loop is disconnected at this time, meanwhile, the spatula in the middle part of thrermostatic bimetal-plate moves downward conflict and generates heat in PTC ceramics
On block, the electric current of major loop flows through conducting wire → movable contact spring → thrermostatic bimetal-plate → spatula → PTC ceramics heating block → static contact
→ conducting wire, so that PTC ceramics heating block is in heating power state, PTC ceramics heating block may be regarded as super large resistance at this time, lead back
Road, which is appointed, is in short-circuit condition, since the underface of thrermostatic bimetal-plate is arranged in PTC ceramics heating block, ensure that PTC ceramics is generated heat
The heat of block can pass to thrermostatic bimetal-plate in time, so that thrermostatic bimetal-plate is constantly in deformed state, to ensure that circuit
Thorough disconnection；It needs thrermostatic bimetal-plate to reset, only need to disconnect external major loop, stop powering for the present invention, to temperature
Decline, can be completed the reset of thrermostatic bimetal-plate.Compared with prior art, the beneficial effects of the present invention are the present invention passes through
Spatula in the middle part of PTC ceramics heating block cooperation thrermostatic bimetal-plate is set in shell, so that by thrermostatic bimetal-plate triggering state
It is maintained, to improve reliability when power-off protector work.
In order to improve control precision of the invention, temperature correction piece, the temperature school are fixed in the insulating supporting seat
Quasi- piece thrermostatic bimetal-plate is pressed in insulating supporting seat, and the end of temperature correction piece is contradicted in thrermostatic bimetal-plate middle top surface
On.The triggering temperature of thrermostatic bimetal-plate is adjusted by adjusting the position of temperature correction piece end conflict thrermostatic bimetal-plate.
In order to enable the fixed thrermostatic bimetal-plate of temperature correction piece is relatively reliable, and temperature correction piece is made to adjust thermo bimetal
Piece triggering temperature is more convenient, and the bottom of the temperature correction piece is machined with the welding boss for being fixed thrermostatic bimetal-plate, institute
The bottom for stating temperature correction piece offers deformation slot.
In order to enable the connection of PTC ceramics heating block and static contact is more convenient reliable, the middle part processing of the static contact
With the through-hole of groove cooperation, through hole is machined with the contact bent downward on the static contact, and the contact protrudes into groove
Bottom setting, PTC ceramics heating block bottom contradict on the contact.
In order to further enhance the reliability that static contact is connect with PTC ceramics heating block, it is machined with protrusion on the contact,
The conflict of protrusion is in the bottom of PTC ceramics heating block.
In order to enable the installation fixation of movable contact spring is more convenient, the movable contact spring is processed into terraced structure, top bar peace
It in fixing seat, gets out of a predicament or an embarrassing situation and is connected with conducting wire, the thrermostatic bimetal-plate is pressed abd fixed on top bar through temperature correction piece
Top.
In order to enable the connection of movable contact spring and conducting wire is more convenient, the end got out of a predicament or an embarrassing situation is machined with the weldering of connecting wire
Connect locating detent.
In order to enable the connection of static contact and conducting wire is more convenient, one end of static contact connecting wire is machined with connecting wire
Welding locating detent.
In order to enhance the electric conductivity and thermal diffusivity of PTC ceramics heating block, the top and bottom of the PTC ceramics heating block are equal
Coated with conductive silver layer.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is thrermostatic bimetal-plate structural schematic diagram in the present invention.
Fig. 3 is the cross-sectional view of the line A-A along Fig. 2.
Fig. 4 is static contact structural schematic diagram in the present invention.
Fig. 5 is the cross-sectional view of the line B-B along Fig. 4.
Fig. 6 is temperature corrector strip structural schematic diagram in the present invention.
Fig. 7 is the cross-sectional view of the line C-C along Fig. 6.
Fig. 8 is the movable contact spring structural schematic diagram in the present invention.
Wherein, 1 shell, 2 movable contacts, 3 stationary contacts, 4 thrermostatic bimetal-plates, 401U type groove, 402 spatulas, 5 static contacts, 501
Through-hole, 502 contacts, 503 protrusions, 6PTC ceramic heating block, 7 insulating supporting seats, 8 temperature correction pieces, 801 deformation slots, 802 welding
Boss, 9 movable contact springs, 10 locating detents, 11 sealants, 12 conducting wires.
Specific embodiment
A kind of self-locking power-off delay protection device as shown in figures 1-8 is arranged in shell 1 including shell 1 open at one end
There is overcurrent and overheating protection component, the end of overcurrent and overheating protection component is connected with two line conductors 12 stretched out from opening, shell 1
The sealed glue 11 of being open seals, and forms seal cavity, overcurrent and overheating protection component include be mounted on it is quiet in insulating supporting seat 7
Contact 5, movable contact spring 9, temperature correction piece 8 and 4 temperature correction piece of thrermostatic bimetal-plate, 8 thrermostatic bimetal-plate 4 are pressed on insulating supporting
In seat 7, and the end of temperature correction piece 8 contradicts in 4 middle top surface of thrermostatic bimetal-plate, and the bottom of temperature correction piece 8 is machined with
It is fixed the welding boss 802 of thrermostatic bimetal-plate 4, the bottom of temperature correction piece 8 offers deformation slot 801, and the one of static contact 5
End is connected with conducting wire 12, and stationary contact 3 is fixed on the other end of static contact 5, and one end of movable contact spring 9 is connected with conducting wire 12, moves touching
The other end of piece 9 is fixedly connected with one end of thrermostatic bimetal-plate 4, and movable contact spring 9 is processed into terraced structure, and top bar is mounted on solid
In reservation, to get out of a predicament or an embarrassing situation and be connected with conducting wire 12, thrermostatic bimetal-plate 4 is pressed abd fixed on the top of top bar through temperature correction piece 8, under
The end of step is machined with the welding locating detent 10 of connecting wire 12, and the other end of thrermostatic bimetal-plate 4 is fixed with matches with stationary contact 3
The movable contact 2 of conjunction；It opens up fluted on insulating supporting seat 7, the PTC ceramics heating block being connected with static contact 5 is provided in groove
6, the middle part of static contact 5 processes the through-hole 501 with groove cooperation, is machined with the contact bent downward at through-hole 501 on static contact 5
502, contact 502 protrudes into bottom portion of groove setting, and protrusion 503 is machined on contact 502, and the conflict of protrusion 503 is generated heat in PTC ceramics
One end of the bottom of block 6,5 connecting wire 12 of static contact is machined with the welding locating detent 10 of connecting wire 12, thrermostatic bimetal-plate 4
Middle part offers U-type groove 401 so that the middle part of thrermostatic bimetal-plate 4 forms spatula 402, after thrermostatic bimetal-plate 4 is heated both ends to
Upper overturning deformation makes movable contact 2 be detached from stationary contact 3, while spatula 402 moves downward conflict on PTC ceramics heating block 6,
The top and bottom of PTC ceramics heating block 6 are coated with conductive silver layer.
When the invention works, the electric current in major loop flows through 4 → movable contact of conducting wire 12 → movable contact spring, 9 → thrermostatic bimetal-plate 2
3 → static contact of → stationary contact, 5 → conducting wire 12, shell can be made by forming completion circuit at this time with the raising of ambient temperature
Temperature outside 1 passes to internal thrermostatic bimetal-plate 4, when temperature, which reaches thrermostatic bimetal-plate 4, triggers temperature, thrermostatic bimetal-plate
4 deformation occurs, so that both ends are flipped up, since one end of thermo bimetal is fixed in insulating supporting seat 7, so that fixed
One end of movable contact 2 is detached from stationary contact 3, and major loop disconnects at this time, meanwhile, the spatula 402 at 4 middle part of thrermostatic bimetal-plate is transported downwards
Dynamic to contradict on PTC ceramics heating block 6, the electric current of major loop flows through conducting wire 12 → movable contact spring, 9 → thrermostatic bimetal-plate, 4 → spatula
402 → PTC ceramics, 6 → static contact of heating block, 5 → conducting wire 12, so that PTC ceramics heating block 6 is in heating power state, at this time
PTC ceramics heating block 6 may be regarded as super large resistance, and major loop, which is appointed, is in short-circuit condition, since PTC ceramics heating block 6 is arranged in heat
The underface of bimetal leaf 4 ensure that the heat of PTC ceramics heating block 6 can pass to thrermostatic bimetal-plate 4 in time, so that heat is double
Sheet metal 4 is constantly in deformed state, to ensure that the thorough disconnection of circuit；It needs thrermostatic bimetal-plate 4 to reset, only needs to disconnect
External major loop stops that the reset of thrermostatic bimetal-plate 4 can be completed to temperature decline for present invention power supply；Due to hot double
It, which triggers temperature, when the processing factory of sheet metal 4 can not accurately be scheduled on some temperature, but have above and below set temperature certain
It floats, therefore the triggering precision in order to guarantee thrermostatic bimetal-plate 4, is provided with temperature correction piece 8, passes through 8 end of temperature correction piece
It contradicts in 4 top surface of thrermostatic bimetal-plate, so that temperature correction piece 8 has a precompression to thrermostatic bimetal-plate 4, so that thrermostatic bimetal-plate
4 have a predeformation, the triggering temperature of thrermostatic bimetal-plate 4 are controlled by controlling the amplitude of predeformation, to substantially increase
Control precision of the invention.
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing creative labor
A little replacements and deformation, these replacements and deformation are within the scope of the invention.
Claims (9)
1. a kind of self-locking power-off delay protection device is provided with overcurrent overheat guarantor including shell open at one end in the shell
Protecting assembly, the end of the overcurrent and overheating protection component are connected with two line conductors stretched out from opening, the opening warp of the shell
Sealant sealing, and form seal cavity, which is characterized in that the overcurrent and overheating protection component includes being mounted on insulating supporting seat
Interior static contact, movable contact spring and thrermostatic bimetal-plate, one end of the static contact are connected with conducting wire, solid on the other end of static contact
Surely there is stationary contact, one end of the movable contact spring is connected with conducting wire, and one end of the other end of movable contact spring and the thrermostatic bimetal-plate is solid
Fixed connection, the other end of thrermostatic bimetal-plate are fixed with the movable contact with stationary contact cooperation；It is offered on the insulating supporting seat recessed
Slot is provided with the PTC ceramics heating block being connected with static contact in the groove, offers in the middle part of the thrermostatic bimetal-plate U-shaped
Slot, so that the middle part of thrermostatic bimetal-plate forms spatula, both ends are flipped up deformation and to move after the thrermostatic bimetal-plate is heated
Contact is detached from stationary contact, while spatula moves downward conflict on PTC ceramics heating block.
2. a kind of self-locking power-off delay protection device according to claim 1, which is characterized in that in the insulating supporting seat
It is fixed with temperature correction piece, the temperature correction piece, thrermostatic bimetal-plate are pressed in insulating supporting seat, and the end of temperature correction piece
Portion contradicts in thrermostatic bimetal-plate middle top surface.
3. a kind of self-locking power-off delay protection device according to claim 2, which is characterized in that the temperature correction piece
Bottom is machined with the welding boss for being fixed thrermostatic bimetal-plate, and the bottom of the temperature correction piece offers deformation slot.
4. a kind of self-locking power-off delay protection device according to any one of claim 1-3, which is characterized in that described quiet
The through-hole with groove cooperation is machined in the middle part of contact, through hole is machined with the contact bent downward on the static contact,
The contact protrudes into bottom portion of groove setting, and PTC ceramics heating block bottom contradicts on the contact.
5. a kind of self-locking power-off delay protection device according to claim 4, which is characterized in that be machined on the contact
Protrusion, protrusion are contradicted in the bottom of PTC ceramics heating block.
6. a kind of self-locking power-off delay protection device according to any one of claim 1-3, which is characterized in that described dynamic
Contact is processed into terraced structure, and top bar is mounted in fixing seat, is got out of a predicament or an embarrassing situation and is connected with conducting wire, the thrermostatic bimetal-plate warp
Temperature correction piece is pressed abd fixed on the top of top bar.
7. a kind of self-locking power-off delay protection device according to claim 6, which is characterized in that the end got out of a predicament or an embarrassing situation
It is machined with the welding locating detent of connecting wire.
8. a kind of self-locking power-off delay protection device according to any one of claim 1-3, which is characterized in that described quiet
One end of contact connecting wire is machined with the welding locating detent of connecting wire.
9. a kind of self-locking power-off delay protection device according to any one of claim 1-3, which is characterized in that described
The top and bottom of PTC ceramics heating block are coated with conductive silver layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710208524.3A CN106847616B (en) | 2017-03-31 | 2017-03-31 | A kind of self-locking power-off delay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710208524.3A CN106847616B (en) | 2017-03-31 | 2017-03-31 | A kind of self-locking power-off delay protection device |
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| Publication Number | Publication Date |
|---|---|
| CN106847616A CN106847616A (en) | 2017-06-13 |
| CN106847616B true CN106847616B (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710208524.3A Active CN106847616B (en) | 2017-03-31 | 2017-03-31 | A kind of self-locking power-off delay protection device |
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| CN (1) | CN106847616B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416025A (en) * | 2019-08-01 | 2019-11-05 | 广东汇莱德温控器有限公司 | Coupler with elastic overheating protection function |
| CN112530735B (en) * | 2020-12-18 | 2022-12-13 | 西安高压电器研究院股份有限公司 | Double-loop contact structure and vacuum arc extinguish chamber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114782A (en) * | 1994-02-01 | 1996-01-10 | 株式会社生方制作所 | Thermal protector |
| CN104011823A (en) * | 2011-10-20 | 2014-08-27 | 泰科电子日本合同会社 | Protection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202650982U (en) * | 2012-06-18 | 2013-01-02 | 梁安明 | Thermal protector requiring manual hand-operated power off resetting |
| CN203553041U (en) * | 2013-11-08 | 2014-04-16 | 南京海川电子有限公司 | Miniature bimetallic strip type overheating protector |
| CN203733715U (en) * | 2014-02-25 | 2014-07-23 | 南京海川电子有限公司 | Multifunctional motor protector |
| CN206672859U (en) * | 2017-03-31 | 2017-11-24 | 扬州德宝电器科技有限公司 | A kind of self-locking power cut off delay protector |
-
2017
- 2017-03-31 CN CN201710208524.3A patent/CN106847616B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114782A (en) * | 1994-02-01 | 1996-01-10 | 株式会社生方制作所 | Thermal protector |
| CN104011823A (en) * | 2011-10-20 | 2014-08-27 | 泰科电子日本合同会社 | Protection device |
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| Publication number | Publication date |
|---|---|
| CN106847616A (en) | 2017-06-13 |
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Effective date of registration: 20200117 Address after: No. 8067, Xiang'an West Road, industrial zone, Xiamen Torch High tech Zone (Xiang'an), Xiamen, Fujian Province Patentee after: Xiamen Set Electronics Co., Ltd. Address before: 225000 No. 20, Pioneer Road, Guangling District, Jiangsu, Yangzhou Patentee before: Yangzhou Debao Electrical Technology Co. Ltd. |