CN207303556U - A kind of connector pin, connector and circuit system - Google Patents
A kind of connector pin, connector and circuit system Download PDFInfo
- Publication number
- CN207303556U CN207303556U CN201720949085.7U CN201720949085U CN207303556U CN 207303556 U CN207303556 U CN 207303556U CN 201720949085 U CN201720949085 U CN 201720949085U CN 207303556 U CN207303556 U CN 207303556U
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- Prior art keywords
- fuse
- connector
- link
- contact pin
- pin body
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Abstract
The utility model discloses a kind of connector pin, connector and circuit system, to improve the reliability of circuit system insurance, improves the space availability ratio of circuit system, while reduce the cost of insurance device.Connector pin includes contact pin body and the fuse-link that contact pin body side is fixed on along contact pin body extending direction.In the utility model embodiment technical solution, by selecting suitable fuse-link material and physical dimension, connector pin can be made to meet different blowout current demands.Fuse compared with prior art, the connector pin realize that circuit insures without extra device, improve the space availability ratio of circuit system as the essential device of circuit board.
Description
Technical field
Electronic circuit technology field is the utility model is related to, more particularly to a kind of connector pin, connector and circuit
System.
Background technology
In view of the high reliability request of circuit system, when there is the situation of abnormal overcurrent in circuit malfunctions, it is necessary to and
When cut off circuit, to avoid the important devices in circuit are damaged because of overcurrent overheat, or burn circuit and even cause fire etc.
Situation occurs, therefore the design insured is an essential ring in circuit design.Currently used insurance scheme includes as follows
Three kinds：
Scheme one：Using the protected mode of conventional fuse silk；
Scheme two：The protected mode of conventional fuse silk is replaced using copper wire；
Scheme three：Replaced using PCB (Printed Circuit Board, printed circuit board (PCB), abbreviation PCB) cabling conventional
The protected mode of fuse.
For scheme one, the cost of one side fuse is higher, on the other hand, in high-power applications occasion, due to circuit
The output current of system is larger, it is necessary to which more fuses are used in parallel, according to Joule's law Q=0.24I2Rt, passes through every guarantor
When the electric current of dangerous silk is larger, heat accumulation is easily caused around fuse, cause fuse in not up to blowout current just
It can be fused due to excessive environment temperature, in addition, it is necessary to need setting position to be used to set in circuit system in the program
Fuse；For scheme two, for copper wire in addition to disadvantages mentioned above, its fusing point is also very high, when having high current to lead to for a long time in circuit
It is out-of-date, it is possible that copper wire be not blown and in circuit the first impaired situation of other heating power devices, increase it is on fire
Risk, simultaneously for copper wire and the tie point of pcb board, also due to copper wire temperature is excessive and increases the risk of pcb board failure；It is right
In scheme three, by the use of the copper foil being laid on pcb board as fuse, its fusing-off temperature is equally very high, the heat that copper foil is sent
Pcb board can be directly delivered to, PCB plate burstings, blistering etc. is relatively easily led to, causes pcb board to fail, and after the fusing of copper foil overcurrent not
Easily repair, it is necessary to replace whole pcb board, cost is higher, and equally, the program is also required to set extra device in circuit system
Part, takes the space of circuit system.
In conclusion existing several circuit insurance schemes there are the defects of have：Need to connect additionally in circuit system
Device come realize circuit insure, not only cost it is higher and also take circuit system space；In addition, in scheme two and scheme three,
The reliability of circuit system insurance is relatively low.
Utility model content
The purpose of the utility model embodiment is to provide a kind of connector pin, connector and circuit system, to improve electricity
The reliability of road system insurance, improves the space availability ratio of circuit system, while reduce the cost of insurance device.
The utility model embodiment provides a kind of connector pin, including contact pin body and extends along the contact pin body
The fuse-link of the contact pin body side is fixed in direction.
Preferably, the contact pin body includes the first contact pin body and the second contact pin body, the fuse-link are fixed on institute
State between the side of the first contact pin body and the side of the second contact pin body.
Preferably, the cross-sectional area of the fuse-link is less than the cross-sectional area of the contact pin body.
Preferably, the fusing point of the fuse-link is less than the fusing point of the contact pin body.
Optionally, the shape of cross section of the contact pin body is circular, oval, square or polygon；The fusing
The shape of cross section of body is circular, oval, square or polygon.
Preferably, the contact pin body is an integral molding structure with the fuse-link.
Optionally, the contact pin body is pressed or is welded to connect with the fuse-link.
The connector pin in the utility model embodiment is used in circuit, electric current flows through above-mentioned connector pin, works as electricity
When flowing back to the situation of the abnormal overcurrent of road appearance, fuse-link can fuse so as to cut off circuit, protect circuit system safe operation.Its
In, the size for the blowout current that the material and physical dimension of fuse-link can be as needed is designed, according to Joule's law Q
=0.24I2Rt, wherein Q flow through heat caused by fuse-link for electric current, and I is the electric current for flowing through fuse-link, and R is fuse-link
Resistance, t flow through the time used in fuse-link for electric current.As can be seen from the above equation, the resistance of fuse-link directly affects electric current stream
Heat caused by fuse-link is crossed, in the case where other conditions are constant, the resistance of fuse-link is bigger, and the heat of generation is more,
Fuse-link more easily reaches fusing point so as to melt, in addition, the fusing point of fuse-link also directly affects the fusing effect of fuse-link.And
The material of fuse-link determines its resistivity, thermal conductivity factor and fusing point, and the resistivity and physical dimension of fuse-link determine its electricity
Resistance, its thermal conductivity factor directly affects radiating rate, so as to have impact on temperature rise speed.Therefore, in the utility model embodiment skill
In art scheme, by selecting suitable fuse-link material and physical dimension, connector pin can be made to meet different fusing electricity
Stream demand.The connector pin is series in pcb board circuit, it is possible to reduce influence of the heat to pcb board, improves connector and insert
For the protection reliability of circuit system；And fuse compared with prior art, connector pin are essential as pcb board
Device, realize that circuit insures without extra device, improve the space availability ratio of circuit system；And connector pin
Simple in structure as insurance circuit device part, cost is relatively low.
The utility model embodiment additionally provides a kind of connector, which includes at least one any of the above-described technical side
Connector pin in case.
Preferably, the connector is connected with the contact pin body of the connector pin.
The connector includes above-mentioned connector pin, in addition to possessing conventional func, also has the function of circuit insurance, when
When the situation of abnormal overcurrent occurs in circuit loop, circuit can be cut off, protects circuit safety.
The utility model embodiment additionally provides a kind of circuit system, which includes at least one above-mentioned connection
Device.The functional reliability of the circuit system is higher, and cost is low, and integrated level is higher.
Brief description of the drawings
Fig. 1 is the structure diagram of one embodiment connector pin of the utility model；
Fig. 2 is the structure diagram of another embodiment connector pin of the utility model；
Fig. 3 is the structure diagram of the utility model another embodiment connector pin；
Fig. 4 is the structure diagram of another embodiment of the utility model connector pin；
Fig. 5 is the structure diagram of one embodiment connector of the utility model；
Fig. 6 is the structure diagram that one embodiment connector of the utility model is arranged at circuit board.
Reference numeral：
10- connector pins；
11- contact pin bodies；
111- the first contact pin bodies；
112- the second contact pin bodies；
12- fuse-links；
100- connectors；
200- circuit boards.
Embodiment
In order to improve the reliability of circuit system insurance, the space availability ratio of circuit system is improved, while reduce protector
The cost of part, the utility model embodiment provide a kind of connector pin, connector and circuit system.To make the utility model
Purpose, technical scheme and advantage it is clearer, the utility model is described in further detail by the following examples.
As shown in Figure 1, the connector pin 10 that the utility model embodiment provides includes contact pin body 11 and along contact pin sheet
11 extending direction of body is fixed on the fuse-link 12 of 11 side of contact pin body.
The connector pin 10 in the utility model embodiment is used in circuit, electric current flows through above-mentioned connector pin 10,
When the situation of abnormal overcurrent occurs in current loop, fuse-link 12 can fuse so as to cut off circuit, protection circuit system safety
Operation.Wherein, the size for the blowout current that the material of fuse-link 12 and physical dimension can be as needed is designed, according to
Joule's law Q=0.24I2Rt, wherein Q flow through heat caused by fuse-link 12 for electric current, and I is the electricity for flowing through fuse-link 12
Stream, R are the resistance of fuse-link 12, and t flows through the time used in fuse-link 12 for electric current.As can be seen from the above equation, fuse-link 12
Resistance directly affects electric current and flow through heat caused by fuse-link 12, in the case where other conditions are constant, fuse-link 12
Resistance is bigger, and the heat of generation is more, and fuse-link 12 more easily reaches fusing point so as to melt, in addition, the fusing point of fuse-link 12
It directly affects the fusing effect of fuse-link 12.And the material of fuse-link 12 determines its resistivity, thermal conductivity factor and fusing point, melt
The resistivity and physical dimension of disconnected body determine its resistance, its thermal conductivity factor directly affects radiating rate, so as to have impact on temperature
Lifting speed, the resistivity and physical dimension of fuse-link 12 determine its resistance.Therefore, in the utility model embodiment technical solution
In, by selecting suitable 12 material of fuse-link and physical dimension, connector pin 10 can be made to meet different blowout currents
Demand.The connector pin 10 is series in pcb board circuit, it is possible to reduce influence of the heat to pcb board, improves connector and insert
Protection reliability of the pin 10 to circuit system；And fuse compared with prior art, connector pin 10 must not as pcb board
The device that can lack, realizes that circuit insures without extra device, improves the space availability ratio of circuit system；And connector
Contact pin 10 is simple in structure as insurance circuit device part, and cost is relatively low.
Please refer to Fig.2, in a specific embodiment, the cross-sectional area of fuse-link 12 is less than the transversal of contact pin body 11
Face area.In the embodiment, the cross-sectional area of fuse-link 12 is small, according to resistance calculations formula R=ρ l/s, wherein, R is fusing
The resistance of body 12, ρ are the resistivity of fuse-link 12, and l is the length of fuse-link 12, the material of fuse-link 12 once it is determined that, its electricity
Resistance rate also just determines that the resistance of fuse-link 12 is determined by its physical dimension at this time with fusing point therewith, by varying fuse-link 12
Physical dimension can change its resistance, and then can be designed that the fuse-link 12 of different blowout currents.In the embodiment, fuse-link
12 cross-sectional area is less than the cross-sectional area of contact pin body 11, and the resistance at fuse-link 12 is larger, in connector pin 10
When being made of same material, electric current flows through above-mentioned connector pin 10, and the heat produced at fuse-link 12 is more than contact pin body
The heat produced at 11, starts to melt when electric current is excessive at fuse-link 12, in addition, the cross-sectional area of fuse-link 12 is small, fusing
The required time is also less, it is thus possible to improve the reliability of circuit insurance.
Please refer to Fig.3, in a specific embodiment, the fusing point of fuse-link 12 is less than the fusing point of contact pin body 11, the reality
Apply in example, fuse-link 12 is made from contact pin body 11 of different materials, and the fusing point of fuse-link 12 is relatively low, then electric current flows through
Connector pin 10 is stated, there is abnormal overcurrent, after producing heat, is more prone to fuse at fuse-link 12 in current loop, so that
Open the effect of protection circuit safety.
Please refer to Fig.4, in preferred embodiment, the fusing point of fuse-link 12 is less than the fusing point of contact pin body 11, and fuse-link
12 cross-sectional area is less than the cross-sectional area of contact pin body 11.In the embodiment, the fusing point of fuse-link 12 it is relatively low, it is necessary to compared with
Few heat, that is, fusible, and the resistance of fuse-link 12 is larger, can produce substantial amounts of heat, the sectional area of fuse-link 12 is small, then
Easily fuse, therefore, in the program, fuse-link 12 is more prone to fuse, and in actual use, designer can be according to actual electricity
The current requirements on road reasonably select and design the material and size of fuse-link 12 in connector pin 10.
Please continue to refer to Fig. 2 to Fig. 4, in preferred embodiment, contact pin body 11 includes the first contact pin body 111 and second
Contact pin body 112, fuse-link 12 are fixed between the side of the first contact pin body 111 and the side of the second contact pin body 112.Often
In rule design, 10 one end of connector pin is connected with connector, and the other end is connected with circuit board.In the embodiment, fuse-link 12
Positioned at the region at 10 non-both ends of connector pin, it need not be attached with connector or circuit board, it is not necessary to due to fuse-link 12
Intensity be less than contact pin body 11, influence connection effect, connector pin 10 and the connection of connector and circuit board can be made steady
Qualitative and reliability is higher.
In specific embodiment, the shape of cross section of contact pin body is unlimited, can be circular, oval, square or more
Side shape, the shape of cross section of fuse-link is circular, oval, square or polygon, and designer can select to set according to demand
Meter.
The connection mode of contact pin body and fuse-link is unlimited, for example, contact pin body and fuse-link are same material, then contact pin
Body can be an integral molding structure with fuse-link, and technique is simple；Or contact pin body is fabricated separately with fuse-link, carry out afterwards
Pressing or welding.
When contact pin body and fuse-link are different materials, then contact pin body and fuse-link is fabricated separately in prioritizing selection, it
Connection mode connecting contact pin body and fuse-link by pressing or welding afterwards.
Fig. 5 is refer to, the utility model embodiment additionally provides a kind of connector 100, which includes at least one
Connector pin 10 in a any of the above-described technical solution.As shown in fig. 6, connector 100 is arranged on circuit board 200, except
Possess outside conventional func, also there is circuit insurance, when the situation of abnormal overcurrent occurs in circuit loop, electricity can be cut off
Road, protects circuit safety.
In general, connector 100 can include multiple connector pins 10, in the utility model embodiment, connector 100 wraps
Include the connector pin 10 in an above-mentioned technical proposal and the function of protection circuit safety can be achieved, and only have one in the program
A connector pin 10 generate heat it is more, be conducive to connector heat dissipation；Connector 100 is included in two or more above-mentioned technical proposal
Connector pin 10 can then improve the protection reliability to circuit, if one of connector pin 10 breaks down, not
Fuse in time, there is a connector pin 10 to fuse in other connector pins 10, you can cut-out circuit, can also protect circuit
Safety.
In the utility model specific embodiment, connector 100 is connected with the contact pin body of connector pin 10.The connection side
Formula can be such that fuse-link is exposed to outside connector 100, and when electric current is excessive in circuit, fuse-link is easy to fuse, and disconnects circuit, can
To improve the protection reliability to circuit.
The utility model embodiment additionally provides a kind of circuit system, which includes at least one above-mentioned connection
Device.The functional reliability of the circuit system is higher, and cost is low, and integrated level is higher.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
New spirit and scope.If in this way, these modifications and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these modification and variations.
Claims (10)
1. a kind of connector pin, it is characterised in that be fixed on institute including contact pin body and along the contact pin body extending direction
State the fuse-link of contact pin body side.
2. connector pin as claimed in claim 1, it is characterised in that the contact pin body includes the first contact pin body and the
Two contact pin bodies, the fuse-link be fixed on the first contact pin body side and the second contact pin body side it
Between.
3. connector pin as claimed in claim 1, it is characterised in that the cross-sectional area of the fuse-link is less than described insert
The cross-sectional area of pin body.
4. connector pin as claimed in claim 1, it is characterised in that the fusing point of the fuse-link is less than the contact pin body
Fusing point.
5. connector pin as claimed in claim 1, it is characterised in that the contact pin body is integrated into the fuse-link
Type structure.
6. connector pin as claimed in claim 1, it is characterised in that the contact pin body and the fuse-link press or
It is welded to connect.
7. such as claim 1~6 any one of them connector pin, it is characterised in that the cross section shape of the contact pin body
Shape is circular, oval, square or polygon；The shape of cross section of the fuse-link is circular, oval, square or more
Side shape.
8. a kind of connector, it is characterised in that including at least one such as claim 1~7 any one of them connector pin.
9. connector as claimed in claim 8, it is characterised in that the contact pin of the connector and the connector pin
Body connects.
10. a kind of circuit system, it is characterised in that including at least one connector as described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720949085.7U CN207303556U (en) | 2017-07-31 | 2017-07-31 | A kind of connector pin, connector and circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720949085.7U CN207303556U (en) | 2017-07-31 | 2017-07-31 | A kind of connector pin, connector and circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303556U true CN207303556U (en) | 2018-05-01 |
Family
ID=62448207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720949085.7U Active CN207303556U (en) | 2017-07-31 | 2017-07-31 | A kind of connector pin, connector and circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303556U (en) |
-
2017
- 2017-07-31 CN CN201720949085.7U patent/CN207303556U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201010 Address after: Ohio, USA Patentee after: Dimension Corp. Address before: 1510 Kansas Avenue, Loren, Ohio, USA Patentee before: Emerson Energy Systems, AB |