CN208507604U - A kind of current over-load protector - Google Patents
A kind of current over-load protector Download PDFInfo
- Publication number
- CN208507604U CN208507604U CN201821108261.5U CN201821108261U CN208507604U CN 208507604 U CN208507604 U CN 208507604U CN 201821108261 U CN201821108261 U CN 201821108261U CN 208507604 U CN208507604 U CN 208507604U
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- CN
- China
- Prior art keywords
- shell
- sliding piece
- metal sliding
- heating wire
- resistance heating
- 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.)
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- Thermally Actuated Switches (AREA)
Abstract
The utility model discloses a kind of current over-load protectors, including pedestal, shell, resistance heating wire, screw, terminal, stationary contact, movable contact and metal sliding piece；The pedestal and shell are connected to form one for placing resistance heating wire, stationary contact, the inner cavity of movable contact and metal sliding piece, one end of the terminal is inserted into the inside of shell on the outside of shell and connect with resistance heating wire, the stationary contact and cage connection, the metal sliding piece passes through screw and cage connection, the movable contact is connected with metal sliding piece, one end of the resistance heating wire is connect with terminal, the other end is connected with screw, the material of the metal sliding piece is the bidirectional memory metal deformed by temperature change, metal sliding piece dilatancy is set to separate movable contact with stationary contact after the resistance heating wire is heated.
Description
Technical field
The utility model relates to a kind of current protective device apparatus field more particularly to a kind of current over-load protectors.
Background technique
Overload protective device is the circuit protection device designed according to the actual needs of electrical control industry, can be to electrical system
System, squirrel-cage motor, the overcurrent of coiling electric motor, short circuit, phase shortage is mutually unbalance, misphase and start-up course (keeping away starting overcurrent) etc.
Offer is effectively protected.Currently on the market, many electrical equipments without setting overload protective device, in use, often by
In the electric current on circuit is excessive or short circuit, the element burn-up in equipment damages, increases maintenance cost, reduction makes
With the service life, great trouble is brought to our life.
Traditional overload protective device is typically all to realize circuit by the structure of metal fuse or electronic circuit
Safeguard protection, such safety of structure is not high, and volume is bigger.
Summary of the invention
(1) technical problems to be solved
The technical problems to be solved in the utility model is that traditional overload protective device safety is poor, and bulky asks
Topic.
(2) technical solution
In order to solve the above technical problems, the utility model provides a kind of current over-load protector, including pedestal, shell, electricity
Hinder heater strip, screw, terminal, stationary contact, movable contact and metal sliding piece；The pedestal and shell are connected to form one for putting
The inner cavity of resistance heating wire, stationary contact, movable contact and metal sliding piece are set, one end of the terminal is inserted on the outside of shell
The inside of shell is simultaneously connect with resistance heating wire, the stationary contact and cage connection, and the metal sliding piece is by screw and outside
Shell connection, the movable contact are connected with metal sliding piece, and one end of the resistance heating wire is connect with terminal, the other end and screw
Be connected, the material of the metal sliding piece is the bidirectional memory metal deformed by temperature change, the resistance heating wire by
Metal sliding piece dilatancy is set to separate movable contact with stationary contact after heat.
In above-mentioned current over-load protector, the structure of the screw is a cylinder, the cylinder include threaded end and
Annular groove, the resistance heating wire are wrapped on annular groove.
In above-mentioned current over-load protector, the shell includes the screw thread hole seat of protrusion, and the end of thread is plugged on
In screw thread hole seat.
In above-mentioned current over-load protector, the pedestal is connected with shell by ultrasonic bonding.
Beneficial effect
Compared with the prior art, the advantages of the present invention are: due to the concatenated electricity of the metal sliding piece
Resistance heater strip flows through biggish electric current and generates heat, and the material of the metal sliding piece is pair deformed by temperature change
To memory metal, so deforming metal sliding piece by the heat that resistance heating wire is conducted, thus by movable contact and stationary contact
Separation, therefore have the characteristics that sensitive, contact capacity is big, the service life is long, the safety of product is improved, and be not necessarily to metal
The structure of fuse or electronic circuit complexity, so greatly reducing volume.
Detailed description of the invention
Fig. 1 is the main view of the current over-load protector of the utility model；
Fig. 2 is the cross-sectional view of A-A in Fig. 1；
In figure, 1 be pedestal, 2 be shell, 3 be resistance heating wire, 4 be terminal, 5 be stationary contact, 6 be movable contact, 7 be gold
Belong to sliding piece, 8 be screw, 9 be the end of thread, 10 be annular groove, 11 be screw thread hole seat.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment cannot be used to limit the scope of the utility model for illustrating the utility model.
Embodiment
As depicted in figs. 1 and 2, a kind of current over-load protector, including pedestal 1, shell 2, resistance heating wire 3, screw 8,
Terminal 4, stationary contact 5, movable contact 6 and metal sliding piece 7；The pedestal 1 and shell 2 are connected to form one and add for placing resistance
The inner cavity of heated filament 3, stationary contact 5, movable contact 6 and metal sliding piece 7, one end of the terminal 4 are inserted into outer from the outside of shell 2
The inside of shell 2 is simultaneously connect with resistance heating wire 3, and the stationary contact 5 is connect with shell 2, and the metal sliding piece 7 passes through screw 8
It is connect with shell 2, the movable contact 6 is connected with metal sliding piece, and one end of the resistance heating wire 3 is connect with terminal 4, another
End is connected to connect with the formation of metal sliding piece 7 with screw 8, and the material of the metal sliding piece 7 is to pass through temperature change
The bidirectional memory metal of deformation makes 7 dilatancy of metal sliding piece make movable contact 6 and stationary contact after the resistance heating wire 3 is heated
5 separation of point.
The structure of the screw 8 is a cylinder, which includes threaded end 9 and annular groove 10, the resistance heating
Silk 3 is wrapped on annular groove, increases the effect of connection, and improve the thermal conductivity of resistance heating wire 3.Shell includes convex
The screw thread hole seat 11 risen, the end of thread 9 are plugged in screw thread hole seat 11.
Above-mentioned pedestal 1 is connected with shell 2 by ultrasonic bonding, therefore leakproofness is relatively good.
When operation, the current over-load protector and load in series, when current overload, stall occur for load, electric current is more than
Set by protector when escape value, biggish overload electricity is flowed through with the concatenated resistance heating wire 3 of the metal sliding piece 7
Stream and generate heat, resistance heating wire 3 by after heat conductive metal sliding piece 7,7 expanded by heating of metal sliding piece and generate interior answer
Power disconnects its contact, and when the electric current of load, temperature return to normal, the metal sliding piece 7 becomes automatic closed reduction again.
The above is only preferred embodiments of the present invention, it is noted that for the ordinary skill people of the art
Member for, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (4)
1. a kind of current over-load protector, which is characterized in that the current over-load protector includes pedestal (1), shell (2), electricity
Hinder heater strip (3), screw (8), terminal (4), stationary contact (5), movable contact (6) and metal sliding piece (7)；The pedestal (1) and
Shell (2) is connected to form one for placing resistance heating wire (3), stationary contact (5), movable contact (6) and metal sliding piece (7)
Inner cavity, one end of the terminal (4) are inserted into the inside of shell (2) on the outside of shell (2) and connect with resistance heating wire (3)
It connects, the stationary contact (5) connect with shell (2), and the metal sliding piece (7) is connect by screw (8) with shell (2), described
Movable contact (6) is connected with metal sliding piece, and one end of the resistance heating wire (3) is connect with terminal (4), the other end and screw
(8) it is connected, the material of the metal sliding piece (7) is the bidirectional memory metal deformed by temperature change, and the resistance adds
Metal sliding piece (7) dilatancy is set to separate movable contact (6) with stationary contact (5) after heated filament (3) is heated.
2. current over-load protector according to claim 1, which is characterized in that the structure of the screw (8) is a circle
Column, the cylinder include threaded end (9) and annular groove (10), and the resistance heating wire (3) is wrapped on annular groove.
3. current over-load protector according to claim 2, which is characterized in that the shell includes the threaded hole of protrusion
Seat (11), the end of thread (9) are plugged on screw thread hole seat (11).
4. current over-load protector according to claim 1, which is characterized in that the pedestal (1) and shell (2) are by surpassing
Sound wave is weldingly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821108261.5U CN208507604U (en) | 2018-07-13 | 2018-07-13 | A kind of current over-load protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821108261.5U CN208507604U (en) | 2018-07-13 | 2018-07-13 | A kind of current over-load protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208507604U true CN208507604U (en) | 2019-02-15 |
Family
ID=65284528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821108261.5U Active CN208507604U (en) | 2018-07-13 | 2018-07-13 | A kind of current over-load protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208507604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111821912A (en) * | 2020-08-04 | 2020-10-27 | 江西贝尔高科新材料有限公司 | Plastic film bright smooth tapping agent pelletization former |
-
2018
- 2018-07-13 CN CN201821108261.5U patent/CN208507604U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111821912A (en) * | 2020-08-04 | 2020-10-27 | 江西贝尔高科新材料有限公司 | Plastic film bright smooth tapping agent pelletization former |
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