CN103824728A - Temperature controllable protective tube - Google Patents
Temperature controllable protective tube Download PDFInfo
- Publication number
- CN103824728A CN103824728A CN201410080737.9A CN201410080737A CN103824728A CN 103824728 A CN103824728 A CN 103824728A CN 201410080737 A CN201410080737 A CN 201410080737A CN 103824728 A CN103824728 A CN 103824728A
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- Prior art keywords
- protective tube
- contact plate
- metal clips
- copper sheathing
- controllable temperature
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Abstract
The invention discloses a temperature controllable protective tube. The temperature controllable protective tube is characterized in that the tube body is internally provided with a bimetallic strip and a PTC (Positive Temperature Coefficient) heating element; a first metallic electric strip and a second metallic electric strip are arranged at one side of the bimetallic strip; one end of the first metallic electric strip is connected with a first copper bush through a first contact plate while the other end of the first metallic elastic strip is provided with a movable contact corresponding to a conductive connection strip; the conductive connection strip is connected with a second copper bush through a second contact plate; and one end of the PTC heating element is connected with the first metallic elastic strip while the other end of the PTC heating element is electrically connected with the second contact plate through a PTC connection strip. When a load circuit works normally, the protective tube is connected with the circuit; when the current of the load circuit exceeds a set value, the bimetallic strip is heated to bend so as to drive the first metallic elastic strip, then the movable contact is separated from the conductive connection strip so as to disconnect the circuit, and at the same time, the PTC heating element is connected with the circuit to emit heat continuously; and only when the circuit is shut down manually, the bimetallic strip is reset to ensure that the movable contact is connected with the conductive connection strip, so that the characteristics of reusability and high safety are provided.
Description
[technical field]
The present invention relates to use for electronic products Thermal Cutoffs, particularly relate to a kind of controllable temperature protective tube.
[background technology]
For guaranteeing circuit safety, prevent from when electric current is excessive causing danger, in circuit, be conventionally all provided with Thermal Cutoffs, in the time that load current is excessive, described Thermal Cutoffs automatically fuses and cuts off circuit, to avoid the generation of fire.Thermal Cutoffs can be divided into multiple: organic substance type Thermal Cutoffs and porcelain tube type Thermal Cutoffs.Described organic substance type Thermal Cutoffs is made up of moving contact, spring, fusable links.Before Thermal Cutoffs starts, electric current flows to moving contact from left side lead-in wire, goes between to the right mobile by metal shell.In the time that external temperature reaches design temperature, the fusing of organic substance fusable links, Compress Spring fluffs and makes moving contact go between and separate with left side, thereby cuts off circuit.Described porcelain tube type Thermal Cutoffs by axisymmetric lead-in wire, under set point of temperature fusible fusible alloy and forming for special mixture and porcelain tube of preventing its fusing oxidation.In the time that environment temperature rises, mixture starts liquefaction, and in the time reaching fusing point, the fusible alloy having melted is shrunk to rapidly spherical under capillary effect centered by the lead-in wire of two ends, thus permanent cut-off loop.No matter be the Thermal Cutoffs of which kind of type, it is had no progeny and just cannot reuse at high temperature melting, and it can only move once, therefore after fusing, needs the Thermal Cutoffs that often more renews, uses comparatively and bothers.
[summary of the invention]
The present invention is intended to address the above problem, and capable of circulationly repeatedly uses and provide a kind of, can not automatically reset, thereby can guarantee the controllable temperature protective tube of Electrical Safety before disconnection fault is eliminated.
For realizing object of the present invention, the invention provides a kind of controllable temperature protective tube, it is characterized in that, this protective tube is provided with body, be socketed with respectively the first copper sheathing and the second copper sheathing that importing and derived current are used in the end, two ends of described body, in described body, be provided with bimetal leaf and PTC heater, be provided with the first metal clips and the second metal clips in a side of described bimetal leaf, one end first contact plate of this first metal clips is connected with the first copper sheathing, the other end of this first metal clips is free end, this free end end is provided with moving contact, in the body corresponding with described moving contact, be provided with conductive connecting piece, this conductive connecting piece is connected with the second contact plate, the second contact plate is connected with described the second copper sheathing, one end second metal clips of described PTC heater is connected with the first metal clips, the other end of this PTC heater is electrically connected with described the second contact plate through PTC brace, and the electric current of the load connecting when controllable temperature protective tube is during in normal range (NR), electric current is through the first copper sheathing, the first metal clips, conductive connecting piece, the second contact plate, the second copper sheathing and conducting, when the electric current of the load connecting when controllable temperature protective tube exceedes set point, bimetal leaf heated bending and promote the first metal clips, the moving contact of the first metal clips is separated and open circuit with conductive connecting piece, simultaneously PTC heater and circuit turn-on and persistent fever, while only having hand off circuit, described bimetal leaf resets and makes moving contact contact conducting with conductive connecting piece.
Described PTC brace is located in body, on described PTC brace, is provided with vertical with it dielectric support block, and the other end of this back-up block is connected with described bimetal leaf and the first metal clips.
The middle part of described the first metal clips is connected on described back-up block, and this first metal clips is plate body, which is provided with two conductive contacts that protrude from its plane, and these two conductive contacts contact with the two ends of described bimetal leaf respectively.
The body of this protective tube is by upper cover body and lower cover is involutory is formed by connecting, and is respectively equipped with the first copper sheathing and the second copper sheathing outside the end, two ends of described upper cover body and lower cover.
Described the first contact plate is located between described upper cover body and lower cover, and is fixedly connected with described lower cover, and one end of this first contact plate contacts with the first copper sheathing, and its other end contacts with the end of described the first metal clips.
Be provided with the first conduction link with the parallel contact of inner face of described the first copper sheathing in the end of described the first contact plate, on described the first contact plate one side surface, be provided with vertical with it positioning convex, on described lower cover, be provided with the location notch matching with described positioning convex, described positioning convex is plugged in described location notch.
One end of described the second contact plate is connected with described PTC brace, and its other end is connected with described the second copper sheathing contact, on described the second contact plate, is provided with connecting hole.
Described conductive connecting piece is L-type, and its one end is corresponding with described moving contact, and its other end is plugged in the connecting hole of described the second contact plate.
One end of described the first metal clips is located between described the first contact plate and lower cover, on described back-up block, is connected with heating wire, and this heating wire is connected with described bimetal leaf.
Described upper cover body 13 and lower cover are made up of insulating material, and described conductive connecting piece is silver sheet metal, and described the first contact plate and the second contact plate are made up of electric conducting material.
Contribution of the present invention is, it efficiently solves the problems referred to above.The present invention is by arranging bimetal leaf and PTC heater, protective tube energy automatic shutoff circuit not only can make to load on overload or overtemperature time, and after circuit because overtemperature overload disconnects, only after elimination fault, just can make manually circuit reset connect, thereby both can Reusability, can guarantee again circuit safety.Compared with prior art, controllable temperature protective tube of the present invention can not burn circuit because circuit is excessive, has safe and reliable feature.The present invention has overcome in prior art fuse can only expendable problem, and have simple in structure, easy to install, temperature control is accurate, reliable operation, the feature such as cost-saving.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present invention.
[embodiment]
The following example is to further explanation of the present invention and supplements, the present invention is not constituted any limitation.
As shown in 1, controllable temperature protective tube of the present invention is provided with PTC heater 30, and it can be repeatedly used, and can only could reset manually, thus more convenient use, and use safety.
Controllable temperature protective tube of the present invention comprises upper cover body 13, lower cover 14, the first copper sheathing 11, the second copper sheathing 12, the first contact plate 51, the second contact plate 52, the first metal clips 41, the second metal clips 42, bimetal leaf 20, conductive connecting piece 60, PTC brace 70 and PTC heater 30.
Specifically, as shown in Figure 1, the body of controllable temperature protective tube of the present invention is by upper cover body 13 and lower cover 14 is involutory is formed by connecting, in the present embodiment, and its cylindrical body.Described upper cover body 13 and lower cover 14 are made up of insulating material, are generally the working condition of being convenient to observe protective tube internal components, and described upper cover body 13 and lower cover 14 can be made up of transparent insulation materials such as polymethyl methacrylate.
As shown in Figure 1, for ease of connecting circuit, make protective tube energy turning circuit, be arranged with respectively the first copper sheathing 11 and second copper sheathing 12 of tubulose at the two ends of described upper cover body 13 and lower cover 14.Described the first copper sheathing 11 and the second copper sheathing 12 are round sleeve shape body, and the end of its size and upper cover body 13 and lower cover 14 matches.By at sheathed the first copper sheathing 11 of upper cover body 13 and lower cover 14 ends and the second copper sheathing 12, not only can make upper cover body 13 and lower cover 14 be fastenedly connected, also can facilitate connecting circuit.Described the first copper sheathing 11 can be connected with circuit by known mode with the second copper sheathing 12, thereby by protective tube place in circuit.For example, can binding post or socket be set in the outer end of the first copper sheathing 11 and the second copper sheathing 12, to peg graft or welding lead, or the first copper sheathing 11 and the second copper sheathing 12 are connected on corresponding metal bracket and are conducted electricity be connected.
As shown in Figure 1, in described lower cover 14, be provided with PTC brace 70, this PTC brace 70 is sheet metal.Be provided with back-up block 80 at the middle part of this PTC brace 70, this back-up block 80 is made up of insulating material.Be connected with bimetal leaf 20, the first metal clips 41 and heating wire 90 at the other end of described back-up block 80.Specifically, the middle part of described bimetal leaf 20 and the first metal clips 41 is connected on described back-up block 80, and described the first metal clips 41 is located at the outside of bimetal leaf 20.Described bimetal leaf 20 is known bimetal leaf 20, in the time that load temperature acquires a certain degree, and the just temperature distortion and bending laterally of this bimetal leaf 20.Described the first metal clips 41 is plate body, which is provided with two conductive contacts 412 that protrude from its plane.Described conductive contact 412 contacts with the two ends of described bimetal leaf 20 respectively, thus with bimetal leaf 20 conductings.In the present embodiment, described conductive contact 412 is formed V-arrangement bending and forms towards bimetal leaf 20 by the first metal clips 41.Described heating wire 90 is located on back-up block 80, and is connected with the two ends of described bimetal leaf 20, produces heat when switching on.In the time that load temperature reaches set point, described bimetal leaf 20 heated bendings, just can promote described the first metal clips 41 and move laterally.One end of described the first metal clips 41 is connected with described the first copper sheathing 11 by the first contact plate 51, and the other end of this first metal clips 41 is free end, and it is connected with described the second copper sheathing 12 by conductive connecting piece 60 and the second contact plate 52.
As shown in Figure 1, described the first contact plate 51 is made up of electric conducting material, and it is located between upper cover body 13 and lower cover 14, and is fixedly connected with described lower cover 14.This first contact plate 51 is plate body, and its one end is connected with the first copper sheathing 11, and the other end is connected with the first metal clips 41.Be provided with the first conduction link 511 that is 90 degree turnovers in the end of this first contact plate 51, this the first conduction link 511 is located between described the first copper sheathing 11 and lower cover 14, thereby can with the first copper sheathing 11 conductings, and increase contact area with improve electric conductivity.On the downside surface of described the first contact plate 51, be provided with vertical outward extending positioning convex 512, this positioning convex 512 intervals and be located at abreast described the first connecting portion one side.On described lower cover 14, be provided with the location notch matching with described positioning convex 512, by described positioning convex 512 is inserted in described location notch, just the first contact plate 51 can be positioned on lower cover 14.
Described the second contact plate 52 is made up of electric conducting material, and it is plate body.As shown in Figure 1, one end of this second contact plate 52 is connected with described PTC brace 70 contacts, and its other end is withheld on described lower cover 14, and is connected with described the second copper sheathing 12 contacts.On described the second contact plate 52 and lower cover 14, be provided with the connecting hole of mutual perforation, for connecting described conductive connecting piece 60.
As shown in Figure 1, described conductive connecting piece 60 is L-type, for turning circuit.Described the second contact plate 52 upsides are located in the parallel and compartment of terrain of this conductive connecting piece 60, and its other end vertically inserts in described connecting hole and is connected with described the second contact plate 52 conductings.For preventing that conductive connecting piece 60 from affecting circuit safety performance because of oxidation, in the present embodiment, described conductive connecting piece 60 is selected silver sheet metal, and it is at high temperature not oxidizable yet, thereby can guarantee the fail safe of circuit.
As shown in Figure 1, one end of described the first metal clips 41 is located between the first contact plate 51 and lower cover 14, and is electrically connected with the first contact plate 51.The free end downside surface of this first metal clips 41 is provided with moving contact 411, itself and 60 conductings of described conductive connecting piece or disconnection.Under normal conditions, when circuit is normally worked, described moving contact 411 contacts and is electrically connected with described conductive connecting piece 60, thereby makes protective tube turning circuit.When the electric current of the load circuit connecting when protective tube exceedes set point, the heat that described heating wire 90 produces increases, and described bimetal leaf 20 heated bendings just can drive described moving contact 411 to separate with described conductive connecting piece 60, thus open circuit.
As shown in Figure 1, after being disconnected, circuit continues to remain open state, circuit automatically resets and turning circuit when preventing that fault from not getting rid of, be provided with PTC heater 30 in one end of described PTC brace 70, the other end of this PTC heater 30 is connected with described the first metal clips 41 by the second metal clips 42.
When controllable temperature protective tube of the present invention work, in the time that load circuit is normally worked, electric current by the first copper sheathing 11 through the first contact plate 51, the first metal clips 41, conductive connecting piece 60, the second contact plate 52 and the second copper sheathing 12 and conducting load circuit.And in the time that circuital current exceeds safe range value, be that circuit temperature is while exceeding the design temperature of bimetal leaf 20, described bimetal leaf 20 heated bendings, so promote the first metal clips 41 move up and moving contact 411 separated with described conductive connecting piece 60, thereby cut off circuit rapidly.And meanwhile; PTC heater 30 is in conducting state; due to its high resistant performance; these PTC heater 30 persistent fevers; its heat causes bimetal leaf 20 to maintain deformation state always; make moving contact 411 with conductive connecting piece 60 in off-state, thereby make the first copper sheathing 11 and the second copper sheathing 12 and power supply and load also in off-state, to realize the object of protection load.Now, only have manual deenergization, make PTC heater 30 because power down stops heating, just can make bimetal leaf 20 reset, and then moving contact 411 be contacted and turning circuit again with conductive connecting piece 60.
Although the present invention is disclosed by above embodiment, scope of the present invention is not limited to this, is not departing under the condition of the present invention's design, and the similar or equivalent element that above each member can be understood with affiliated technical field personnel is replaced.
Claims (10)
1. a controllable temperature protective tube, it is characterized in that, this protective tube is provided with body, be socketed with respectively the first copper sheathing (11) and the second copper sheathing (12) that importing and derived current are used in the end, two ends of described body, in described body, be provided with bimetal leaf (20) and PTC heater (30), be provided with the first metal clips (41) and the second metal clips (42) in a side of described bimetal leaf (20), one end first contact plate (51) of this first metal clips (41) is connected with the first copper sheathing (11), the other end of this first metal clips (41) is free end, this free end end is provided with moving contact (411), in the body corresponding with described moving contact (411), be provided with conductive connecting piece (60), this conductive connecting piece (60) is connected with the second contact plate (52), the second contact plate (52) is connected with described the second copper sheathing (12), one end second metal clips (42) of described PTC heater (30) is connected with the first metal clips (41), and the other end of this PTC heater (30) is electrically connected with described the second contact plate (52) through PTC brace (70), and
The electric current of the load connecting when controllable temperature protective tube is during in normal range (NR), and electric current is through the first copper sheathing (11), the first metal clips (41), conductive connecting piece (60), the second contact plate (52), the second copper sheathing (12) and conducting; When the electric current of the load connecting when controllable temperature protective tube exceedes set point, bimetal leaf (20) heated bending and promote the first metal clips (41), the moving contact (411) of the first metal clips (41) is separated and open circuit with conductive connecting piece (60), simultaneously PTC heater (30) is with circuit turn-on and persistent fever, while only having hand off circuit, described bimetal leaf (20) resets and makes moving contact (411) contact conducting with conductive connecting piece (60).
2. controllable temperature protective tube as claimed in claim 1, it is characterized in that, described PTC brace (70) is located in body, on described PTC brace (70), be provided with vertical with it dielectric support block (80), the other end of this back-up block (80) is connected with described bimetal leaf (20) and the first metal clips (41).
3. controllable temperature protective tube as claimed in claim 2, it is characterized in that, the middle part of described the first metal clips (41) is connected on described back-up block (80), this first metal clips (41) is plate body, which is provided with two conductive contacts (412) that protrude from its plane, these two conductive contacts (412) contact with the two ends of described bimetal leaf (20) respectively.
4. controllable temperature protective tube as claimed in claim 3, it is characterized in that, the body of this protective tube, by upper cover body (13) and involutory being formed by connecting of lower cover (14), is respectively equipped with the first copper sheathing (11) and the second copper sheathing (12) outside the end, two ends of described upper cover body (13) and lower cover (14).
5. controllable temperature protective tube as claimed in claim 4, it is characterized in that, described the first contact plate (51) is located between described upper cover body (13) and lower cover (14), and be fixedly connected with described lower cover (14), one end of this first contact plate (51) contacts with the first copper sheathing (11), and its other end contacts with the end of described the first metal clips (41).
6. controllable temperature protective tube as claimed in claim 5, it is characterized in that, be provided with the first conduction link (511) parallel with the inner face of described the first copper sheathing (11) in the end of described the first contact plate (51), on described the first contact plate (51) one side surfaces, be provided with vertical with it positioning convex (512), on described lower cover (14), be provided with the location notch matching with described positioning convex (512), described positioning convex (512) is plugged in described location notch.
7. controllable temperature protective tube as claimed in claim 6, it is characterized in that, one end of described the second contact plate (52) is connected with described PTC brace (70), and its other end is connected with described the second copper sheathing (12) contact, on described the second contact plate (52), is provided with connecting hole.
8. controllable temperature protective tube as claimed in claim 7, is characterized in that, described conductive connecting piece (60) is L-type, and its one end is corresponding with described moving contact (411), and its other end is plugged in the connecting hole of described the second contact plate (52).
9. controllable temperature protective tube as claimed in claim 8, it is characterized in that, one end of described the first metal clips (41) is located between described the first contact plate (51) and lower cover (14), on described back-up block (80), be connected with heating wire (90), this heating wire (90) is electrically connected with described bimetal leaf (20).
10. controllable temperature protective tube as claimed in claim 9, it is characterized in that, described upper cover body 13 and lower cover (14) are made up of insulating material, and described conductive connecting piece (60) is silver sheet metal, and described the first contact plate (51) is made up of electric conducting material with the second contact plate (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080737.9A CN103824728A (en) | 2014-03-06 | 2014-03-06 | Temperature controllable protective tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080737.9A CN103824728A (en) | 2014-03-06 | 2014-03-06 | Temperature controllable protective tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103824728A true CN103824728A (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410080737.9A Pending CN103824728A (en) | 2014-03-06 | 2014-03-06 | Temperature controllable protective tube |
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| Country | Link |
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| CN (1) | CN103824728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109727811A (en) * | 2019-03-01 | 2019-05-07 | 中山市勤峰电器有限公司秋浦分公司 | A kind of hand-reset temperature limiter and the temperature adjustment stick for using it |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06295650A (en) * | 1992-02-28 | 1994-10-21 | Hofsaess Ulrika | Thermoswitch |
| US6396381B1 (en) * | 1999-07-22 | 2002-05-28 | Uchiya Thermostat Co., Ltd. | Thermal protector |
| CN202102964U (en) * | 2011-07-05 | 2012-01-04 | 朱天兵 | Outage delay overheat protector |
| CN102568958A (en) * | 2011-12-31 | 2012-07-11 | 上海长园维安电子线路保护股份有限公司 | Self-hold over-current protection device |
| CN203103242U (en) * | 2013-03-01 | 2013-07-31 | 扬州宝珠电器有限公司 | Miniature surface-mount type sensitive overheat protector |
| CN103515145A (en) * | 2013-09-29 | 2014-01-15 | 扬州宝珠电器有限公司 | Overheating overcurrent delayed reset protector |
| CN203607356U (en) * | 2013-11-02 | 2014-05-21 | 东莞市凯恩电子科技有限公司 | Manual reset current protective tube |
| CN203799960U (en) * | 2014-03-06 | 2014-08-27 | 东莞市凯恩电子科技有限公司 | Temperature controllable protective tube |
-
2014
- 2014-03-06 CN CN201410080737.9A patent/CN103824728A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06295650A (en) * | 1992-02-28 | 1994-10-21 | Hofsaess Ulrika | Thermoswitch |
| US6396381B1 (en) * | 1999-07-22 | 2002-05-28 | Uchiya Thermostat Co., Ltd. | Thermal protector |
| CN202102964U (en) * | 2011-07-05 | 2012-01-04 | 朱天兵 | Outage delay overheat protector |
| CN102568958A (en) * | 2011-12-31 | 2012-07-11 | 上海长园维安电子线路保护股份有限公司 | Self-hold over-current protection device |
| CN203103242U (en) * | 2013-03-01 | 2013-07-31 | 扬州宝珠电器有限公司 | Miniature surface-mount type sensitive overheat protector |
| CN103515145A (en) * | 2013-09-29 | 2014-01-15 | 扬州宝珠电器有限公司 | Overheating overcurrent delayed reset protector |
| CN203607356U (en) * | 2013-11-02 | 2014-05-21 | 东莞市凯恩电子科技有限公司 | Manual reset current protective tube |
| CN203799960U (en) * | 2014-03-06 | 2014-08-27 | 东莞市凯恩电子科技有限公司 | Temperature controllable protective tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109727811A (en) * | 2019-03-01 | 2019-05-07 | 中山市勤峰电器有限公司秋浦分公司 | A kind of hand-reset temperature limiter and the temperature adjustment stick for using it |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20140528 Assignee: Dongguan City Kai billion electronic technology Co. Ltd. Assignor: Dongguan KAIN Electronic Science & Technology Co., Ltd. Contract record no.: 2015990000830 Denomination of invention: Temperature controllable protective tube License type: Common License Record date: 20150930 |
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Application publication date: 20140528 Assignee: Jiang Hua Kai Yi Technology Ltd. Assignor: Dongguan KAIN Electronic Science & Technology Co., Ltd. Contract record no.: 2015990000911 Denomination of invention: Temperature controllable protective tube License type: Common License Record date: 20151105 |
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