CN109586061A

CN109586061A - Electric connector

Info

Publication number: CN109586061A
Application number: CN201811232780.7A
Authority: CN
Inventors: 方飞龙
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2018-10-23
Filing date: 2018-10-23
Publication date: 2019-04-05
Anticipated expiration: 2038-10-23
Also published as: CN109586061B

Abstract

The invention discloses a kind of electric connector, it is installed on the circuit board with through-hole, including an ontology, is installed on circuit board；An at least retaining piece, a base portion including being fixed on ontology, it is connected to the lower end of base portion and is contained in an elastic arm of through-hole, and it is connected to a clamping part of the lower end of elastic arm, elastic arm is made of thermo bimetal, it includes the active layers being bonded to each other and a passive layer, the coefficient of thermal expansion of active layers is greater than the coefficient of thermal expansion of passive layer, clamping part is protruded out by the direction that active layers are directed toward passive layer, elastic arm is heated to be bent to passive layer, make clamping part clasp circuit board, elastic arm includes one first arm for deviating from base portion and extending obliquely downward, oppositely extending relative to the first arm and one second arm and connection the first arm and the second arm diagonally downward one first bending part, increase the length and elasticity of elastic arm, it is bent after elastic arm is heated to passive layer, larger bending deformation can be generated and clamping part is made firmly to buckle circuit board, avoid ontology is heated from sticking up Song deformation.

Description

Electric connector

Technical field

The present invention relates to a kind of electric connector, espespecially a kind of electric connector with deformable retaining piece.

Background technique

In the prior art, most of electric connector needs for conductive terminal to be welded in circuit board, in the welding process, is electrically connected It connects device and needs to be subjected to high temperature, insulating body is easy the buckling deformation due to expanded by heating.Application No. is 201710750719.0 Chinese patent disclose a kind of electric connector, the electric connector has an insulating body and leads set on the multiple of insulating body Electric terminal installs the first holding unit at the both ends of insulating body, installs the second holding unit therebetween, wherein the second fixing Device is made of thermo bimetal, can be heated and active bending deformation, including one second holding division being fixed in insulating body, It is connected to the second holding division lower section and is inserted into the second elastic arm of circuit board, the second bending part positioned at the second elastic arm end, Second elastic arm temperature distortion drives the second bending part to buckle circuit board；First holding unit and the second holding device constructions phase Seemingly, but by common metal it is made, is notheated bending, and there is the first bending part to buckle circuit board, and before heated First bending part not clasp circuit board, and when insulating body is by warpage, insulating body will drive the first holding unit mobile So that the first bending part is buckled circuit board, prevents insulating body further heated excessive warpage.When environment temperature increases first, the Two holding units can clamping circuit board, it is additional to increase insulating body both ends and intermediate fixing power, avoid insulating body excessive Buckling deformation.

It is in two vertical plates shape before the non-temperature distortion of second elastic arm, to avoid the second elastic arm from extending beyond circuit too much Plate and influence other electronic components, the second elastic arm is largely contained in the through-hole of circuit board, and length limited is in circuit board Thickness without enough elasticity, lead to not that enough deformations occur, the amplitude of the second elastic arm heated bending is small, leads It causes the second bending part insufficient to the clasp dynamics of circuit board, influences fixing effect.

Therefore, it is necessary to a kind of electric connector of improvement be designed, to overcome the above problem.

Summary of the invention

For background technique problem encountered, the present invention provides a kind of bending of retaining piece and extends and be capable of temperature distortion Electric connector.

To achieve the above object, the present invention uses following technological means:

A kind of electric connector, is installed on a circuit board, and the circuit board has an at least through-hole, comprising: an ontology is installed on institute It states on circuit board；An at least retaining piece, a base portion, the lower end for being connected to the base portion and receiving including being fixed on the ontology In the through-hole an elastic arm and be connected to the elastic arm lower end a clamping part, the elastic arm is made of thermo bimetal, It includes the active layers being bonded to each other and a passive layer, wherein the coefficient of thermal expansion of the active layers is greater than the heat of the passive layer Expansion rate, the clamping part are protruded out by the direction that the active layers are directed toward the passive layer, and the elastic arm is heated to described passive Layer bending, makes circuit board described in the clamping part clasp, wherein the elastic arm includes deviating from the base portion to extend obliquely downward One first arm, and one second arm diagonally downward oppositely extending relative to first arm and connection first arm and institute State one first bending part of the second arm.

Further, the elastic arm also have an and third arm diagonally downward oppositely extending relative to second arm with And one second bending part of connection second arm and the third arm.

Further, the elastic arm has one the 4th arm extended vertically from the lower end of the third arm, the 4th arm Lower end connect the clamping part.

Further, the clamping part includes a flat part, and the upper end of the flat part connects the elastic arm, is put down from described At least side bending in plate portion extends to form a hook portion, and the hook portion and second bending part are located at described in the horizontal direction The same side of plane where flat part.

Further, first bending part and second bending part are contained in the through-hole and respectively in level side There is between the circuit board gap upwards.

Further, the base portion is in two vertical plates shape, and first bending part and second bending part are located at The opposite sides of plane where the base portion.

Further, the clamping part includes a flat part, and the upper end of the flat part connects the elastic arm, is put down from described At least side bending in plate portion extends to form a hook portion, to buckle the bottom surface of the circuit board.

Further, the two sides bending of the flat part extends to form two hook portions, and two hook portion is symmetrical arranged.

Further, the top edge of the hook portion has the engagement edge being serrated.

Further, the engagement edge is from top to bottom obliquely installed along the extending direction of the hook portion.

Further, the retaining piece is integrally made of thermo bimetal.

Further, the card slot supplied for electronic card insertion that the body recess has lengthwise to extend enters, and sets in the card slot There is a fool proof key, the ontology protrudes upward to form two mounting portions at the lengthwise both ends of the card slot, each mounting portion An earclip is pivotally connected to latch the electronic card, the bottom notch of the ontology is installed described in two of them there are three mounting hole Hole is respectively corresponded positioned at the lower section of two mounting portions, another described mounting hole is located at the lower section of the fool proof key, each The mounting hole accommodates a retaining piece.

Compared with prior art, the invention has the following advantages: the elastic arm is contained in the described of the circuit board Through-hole, the elastic arm bending extend and are made of thermo bimetal comprising the active layers being bonded to each other and a passive layer, wherein The coefficient of thermal expansion of the active layers is greater than the coefficient of thermal expansion of the passive layer, and the elastic arm, which also has, deviates from the base portion inclination One first arm that extends downwardly, and one second arm diagonally downward oppositely extending relative to first arm and connection described the One first bending part of one arm and second arm, increases the length and elasticity of the elastic arm, when the elastic arm is heated backward The passive layer bending can generate biggish bending deformation in the thickness of the limited circuit board and make the clamping part The circuit board is firmly buckled, the fastener that the retaining piece buckles the circuit board is enhanced, is bonded the ontology Ground is retained on the smooth circuit board, avoids the ontology that apparent buckling deformation occurs in thermal histories.

A kind of retaining piece, to hold a first device and a second device, the first device has a through-hole, packet It includes: a base portion, to be immobilizated in the second device；One elastic arm, is connected to the lower end of the base portion, and is contained in described logical Hole, the elastic arm include deviating from one first arm that the base portion extends obliquely downward, oppositely extending relative to first arm And one first bending part of one second arm and connection first arm and second arm diagonally downward；One clamping part, even It is connected to the lower end of the elastic arm；Wherein, the elastic arm is made of thermo bimetal comprising the active layers being bonded to each other and a quilt Dynamic layer, the coefficient of thermal expansion of the active layers are greater than the coefficient of thermal expansion of the passive layer, and the elastic arm is heated curved to the passive layer Folding, makes first device described in the clamping part clasp.

Further, the base portion, the elastic arm and the fastener are integrally formed, and the retaining piece is by thermo bimetal It is made.

Further, the clamping part includes a vertically arranged flat part, and the upper end of the flat part connects the bullet Arm bends respectively from two sides of the flat part and extends to form a hook portion, and the hook portion and second bending part are in level side The same side of plane where being located at the flat part upwards.

Compared with prior art, the invention has the following advantages: the elastic arm is contained in the institute of the first device Through-hole is stated, the elastic arm bending extends and is made of thermo bimetal comprising the active layers being bonded to each other and a passive layer, Described in the coefficient of thermal expansions of active layers be greater than the coefficient of thermal expansion of the passive layer, the elastic arm, which also has, to be deviated from the base portion and inclines Described in one first arm that extends obliquely, and one second arm diagonally downward oppositely extending relative to first arm and connection One first bending part of the first arm and second arm, increases the length and elasticity of the elastic arm, after the elastic arm is heated It is bent to the passive layer, biggish bending deformation can be generated in the thickness of the limited first device and makes the card Buckle firmly buckles the circuit board, enhances the fastener that the retaining piece buckles the circuit board, makes the ontology It is snugly retained on the smooth circuit board, avoids the ontology that apparent buckling deformation occurs in thermal histories.

[Detailed description of the invention]

Fig. 1 is the perspective view of electric connector of the present invention and matched electronic card and circuit board；

Fig. 2 is the exploded view of the electric connector of Fig. 1；

Fig. 3 is the inverted perspective view of electric connector of Fig. 1；

Fig. 4 is the perspective view of the retaining piece of the electric connector of Fig. 2；

Fig. 5 is the partial sectional view of the electric connector of Fig. 1；

Fig. 6 is another partial sectional view of the electric connector of Fig. 1；

Fig. 7 is the schematic diagram of retaining piece temperature distortion in Fig. 6.

The drawing reference numeral of specific embodiment illustrates:

Electric connector 100	Ontology 1	Card slot 11	Fool proof key 111
				Mounting portion 12	Terminal groove 13	Mounting hole 14	Locating slot 141
Earclip 2	Terminal 3	Retaining piece 4	Base portion 41
				Bur 411	Positioning region 412	Continuous material 413	Elastic arm 42
First arm 421	Second arm 422	First bending part 423	Third arm 424
				Second bending part 425	4th arm 426	First bending part 427	Second bending part 428
Clamping part 43	Flat part 431	Hook portion 432	Engagement edge 4321
				Active layers 4a	Passive layer 4b	Circuit board A	Through-hole A1
Electronic card B

[specific embodiment]

Purpose, structure, feature and effect to facilitate the understanding of the present invention etc., now in conjunction with the drawings and specific embodiments The invention will be further described.

As shown in Figure 1 to Figure 3, it is electric connector 100 of the present invention, is welded on a first device, in the present embodiment, The first device is a circuit board A, and the circuit board A sets that there are three through-hole A1.The electric connector 100 extends including lengthwise An ontology 1, be assembled in 1 both ends of ontology two earclips 2, set on the ontology 1 multiple conductive terminals 3 and be installed on Three retaining pieces 4 of 1 bottom of ontology.The retaining piece 4 can be immobilizated in a second device, and the second device can be The ontology 1 for containing the conductive terminal 3 is also possible to other electrical components or non-electrical element.In other realities It applies in example, the electric connector 100 can be provided only with the retaining piece 4.

As depicted in figs. 1 and 2, the ontology 1 is made of insulating material, and is installed on the circuit board A.The ontology 1 The card slot 11 that recess has lengthwise to extend is equipped with a fool proof key 111 in the card slot 11, makes to one electronic card B of grafting The card slot 11 divides the two parts not waited for length.The ontology 1 protrudes upward shape at the lengthwise both ends of the card slot 11 At two mounting portions 12, the earclip 2 is respectively pivoted to the corresponding mounting portion 12, to latch the electronic card B.The electricity Connector 100 also has multiple terminal grooves 13, and the card slot 11 is arranged in the transverse direction perpendicular to longitudinally Two sides.

As depicted in figs. 1 and 2, each conductive terminal 3 is fixed on the corresponding terminal groove 13 and extends partially into Enter in the card slot 11 to contact the electronic card B, protrude the bottom of the ontology 1 partially to be welded in the circuit board A, To be electrically connected the electronic card B and the circuit board A.

As shown in figure 3, the bottom notch of the ontology 1, there are three mounting hole 14, mounting hole 14 described in two of them is distinguished The corresponding lower section for being located at two mounting portions 12, another described mounting hole 14 is located at the lower section of the fool proof key 111, each The mounting hole 14 accordingly accommodates the retaining piece 4.

As shown in figure 5, the two sides of the mounting hole 14 have two locating slots 141 upwardly extended.

As shown in figure 4, the retaining piece 4 includes the base portion 41 in two vertical plates shape, it is connected under the base portion 41 End an elastic arm 42 and be connected to the elastic arm 42 lower end a clamping part 43.

As shown in 5 figures, the base portion 41 is contained in the mounting hole 14, and the both side edges of the base portion 41 protrude out to form two Bur 411 is interfered in the ontology 1, and the base portion 41, which protrudes upward, to be formed two positioning regions 412 and be contained in two locating slot 141, positioning guide function is played in the assembling process of the retaining piece 4 from bottom to top.

As shown in figure 4, the base portion 41 has also protruded out downwards two continuous materials 413 to the retaining piece 4 described in stamped During binder band (not shown), the retaining piece 4 is by the 413 binder band of continuous material, and the retaining piece 4 It is installed on the mounting hole 14 by the material strip, fractures after installing and takes the material strip away.

As shown in Figure 4 and Figure 6, the elastic arm 42 is extended downwardly by the base portion 41 and projects into the through-hole A1, institute Stating elastic arm 42 includes deviating from one first arm 421 that the base portion 41 extends obliquely downward, opposite in the lower end of the base portion 41 And one second arm 422 diagonally downward oppositely extending in first arm 421, connection first arm 421 and second arm 422 one first bending part 423, an and third arm 424 diagonally downward oppositely extending relative to second arm 422 and even It connects one second bending part 425 of second arm 422 and the third arm 424 and is erected positioned at the lower end of the third arm 424 One the 4th arm 426 directly extended downwardly.First bending part 423 and second bending part 425 are contained in the through-hole In A1, and there is gap between the circuit board A in the horizontal direction.In the present embodiment, the base portion 41, the elastic arm 42 and the clamping part 43 be an integral molding structure.The elastic arm 42, which also has, connects first arm 421 and the base portion One second bending part 428 of 41 one first bending part 427 and connection the third arm 424 and the 4th arm 426.

As shown in Fig. 4, Fig. 6 and Fig. 7, the clamping part 43 is connected to the lower end of the 4th arm 426 and downwards beyond institute Through-hole A1 is stated, the clamping part 43 has a flat part 431, and the upper end of the flat part 431 connects the 4th arm 426, institute The two sides bending for stating flat part 431 extends to form symmetrically arranged two hook portion 432, to buckle the bottom surface of the circuit board A, institute State the same side that hook portion 432 and second bending part 425 are located at the 431 place plane of flat part in the horizontal direction.Institute The top edge for stating hook portion 432 has the engagement edge 4321 being serrated, and the engagement edge 4321 is along the hook portion 432 Extending direction is from top to bottom obliquely installed, and the engagement edge 4321, which is obliquely installed, makes its side closer to the through-hole A1 Boundary, it is easier to buckle the circuit board A, the setting that is serrated then increases friction of the hook portion 432 for the circuit board A Power.In other embodiments, the only side bending of the flat part 431 extends to form the hook portion 432, can also realize buckle institute State the purpose of circuit board A.

As shown in figure 4, the retaining piece 4 is made of thermo bimetal, including the active layers 4a and passive layer 4b being bonded to each other, Wherein the coefficient of thermal expansion of the active layers 4a is greater than the coefficient of thermal expansion of the passive layer 4b, and the extension side of the hook portion 432 The passive layer 4b is directed toward to by the active layers 4a.The retaining piece 4 is whole to be made of thermo bimetal, facilitates the retaining piece 4 are formed by single thermo bimetal's plate integrated punching.In addition, the hook portion 432 and second bending part 425 are in level side It is located at the same side of the 431 place plane of flat part upwards, so set, the elastic arm 42 can be made to be easier to the hook The extending direction in portion 432 is bent.

As shown in figures 1 to 6, it is multiple described during the electric connector 100 is installed on downwards the circuit board A Multiple conductive sheet (not labeled) of the conductive terminal 3 on the circuit board A are mobile, when the ontology 1 adheres on the circuit board A On, each conductive terminal 3 is placed on the corresponding conductive sheet, and the elastic arm 42 is from the upper direction of the circuit board A In the lower insertion through-hole A1, and the elastic arm 42 is not interfered with the circuit board A.

As shown in Figure 2 and Figure 7, the electric connector 100 and circuit board A is put into togerther reflow oven (not shown) In, the heating through Overwelding and rewelding furnace, the conductive terminal 3 is welded on the circuit board A.During heating welding, temperature Rise, since the thermal expansion amount of the active layers 4a is greater than the thermal expansion amount of the passive layer 4b, makes the elastic arm 42 to described Passive layer 4b, i.e., the described hook portion 432 protrude out direction bending deformation, drive the hook portion 432 to the side of the correspondence through-hole A1 Boundary is mobile, and the engagement edge 4321 is made to contact at the circuit board A.On the other hand, since 1 lengthwise of ontology extends, and Two mounting portion 12 positioned at the lengthwise both ends of the ontology 1 and the fool proof key 111 positioned at 1 middle part of ontology are not It is provided with the conductive terminal 3, the ontology 1 is subjected to being easy that buckling deformation occurs at these positions when high temperature, and is mounted on this The retaining piece 4 at a little positions precisely because high temperature deformation and be snapped in the circuit board A, in the ontology 1 and smooth institute State and generate additional fixing effect between circuit board A, avoid 1 buckling deformation of ontology and by it caused by the conducting end Sub 3 missing solder phenomenons occur.

The electric connector of the invention has the advantages that

1, the elastic arm 42 is made of thermo bimetal comprising the active layers 4a and a passive layer 4b being bonded to each other, wherein institute The coefficient of thermal expansion for stating active layers 4a is greater than the coefficient of thermal expansion of the passive layer 4b, and the elastic arm further includes under the base portion 41 End deviates from one first arm 421 that the base portion 41 extends obliquely downward, oppositely extending relative to first arm 421 and tilt Downward one second arm 422, connection first arm 421 with one first bending part 423 of second arm 422, relative to institute State oppositely extending the second arm 422 and a third arm 424 diagonally downward and connection second arm 422 and the third arm 424 one second bending part 425 and one the 4th arm 426 extended straight down positioned at the lower end of the third arm 424 increase The length and elasticity for having added the elastic arm 42 are bent after the elastic arm 42 is heated to the passive layer 4b, can be limited Biggish bending deformation is generated in the thickness of the circuit board A and the clamping part 43 is made firmly to buckle the circuit board A, is increased The strong retaining piece 4 buckles the fastener of the circuit board A, and the ontology 1 is made snugly to be retained on the smooth electricity On the plate A of road, avoid the ontology 1 that apparent buckling deformation occurs in thermal histories.

2, first bending part 423 and second bending part 425 and the circuit board A keep certain gap, are The deformation of the elastic arm 42 provides space.

3, the engagement edge 4321 is serrated, and improves between the engagement edge 4321 and the circuit board A Frictional force further enhances the fixing effect of the retaining piece 4.

Be described in detail above be only the preferred embodiments of the invention explanation, non-therefore limitation the scope of the patents of the invention, So all equivalence techniques with carried out by this creation specification and diagramatic content change, it is both contained in the scope of the patents of the invention It is interior.

Claims

1. a kind of electric connector, is installed on a circuit board, the circuit board has an at least through-hole characterized by comprising

One ontology is installed on the circuit board；

An at least retaining piece, including being fixed on a base portion of the ontology, being connected to the lower end of the base portion and be contained in described One elastic arm of through-hole and be connected to the elastic arm lower end a clamping part, the elastic arm is made of thermo bimetal comprising The active layers being bonded to each other and a passive layer, wherein the coefficient of thermal expansion of the active layers is greater than the thermal expansion of the passive layer Rate, the clamping part are protruded out by the direction that the active layers are directed toward the passive layer, and the elastic arm is heated curved to the passive layer Folding, makes circuit board described in the clamping part clasp, wherein the elastic arm includes one for deviating from the base portion and extending obliquely downward First arm, and one second arm diagonally downward oppositely extending relative to first arm and connection first arm and described the One first bending part of two arms.

2. electric connector as described in claim 1, it is characterised in that: the elastic arm also has reversed relative to second arm One second bending part of extension and a third arm diagonally downward and connection second arm and the third arm.

3. electric connector as claimed in claim 2, it is characterised in that: the elastic arm has vertical from the lower end of the third arm The lower end of one the 4th arm extended, the 4th arm connects the clamping part.

4. electric connector as claimed in claim 3, it is characterised in that: the clamping part includes a flat part, the flat part Upper end connect the elastic arm, from at least side of the flat part, bending extends to form a hook portion, the hook portion and described the The same side of plane where two bending parts are located at the flat part in the horizontal direction.

5. electric connector as claimed in claim 2, it is characterised in that: first bending part and second bending part are received It is dissolved in the through-hole and there is between the circuit board gap in the horizontal direction respectively.

6. electric connector as claimed in claim 2, it is characterised in that: the base portion is in two vertical plates shape, first bending The opposite sides of plane where portion and second bending part are located at the base portion.

7. electric connector as described in claim 1, it is characterised in that: the clamping part includes a flat part, the flat part Upper end connect the elastic arm, from at least side of the flat part, bending extends to form a hook portion, to buckle the circuit The bottom surface of plate.

8. electric connector as claimed in claim 7, it is characterised in that: the two sides bending of the flat part extends to form described in two Hook portion, two hook portion are symmetrical arranged.

9. electric connector as claimed in claim 7, it is characterised in that: the top edge of the hook portion has be serrated one to nibble Close edge.

10. electric connector as claimed in claim 9, it is characterised in that: extending direction of the engagement edge along the hook portion From top to bottom it is obliquely installed.

11. electric connector as described in claim 1, it is characterised in that: the retaining piece is integrally made of thermo bimetal.

12. electric connector as described in claim 1, it is characterised in that: the card slot that the body recess has lengthwise to extend Supplied for electronic card insertion enters, and a fool proof key is equipped in the card slot, and the ontology protrudes upward at the lengthwise both ends of the card slot Two mounting portions are formed, each mounting portion is pivotally connected an earclip to be had to latch the electronic card, the bottom notch of the ontology Three mounting holes, mounting hole described in two of them are respectively corresponded positioned at the lower section of two mounting portions, another described installation Hole is located at the lower section of the fool proof key, and each mounting hole accommodates a retaining piece.

13. a kind of retaining piece, to hold a first device and a second device, the first device has a through-hole, special Sign is, comprising:

One base portion, to be immobilizated in the second device；

One elastic arm, is connected to the lower end of the base portion, and is contained in the through-hole, and the elastic arm includes deviating from the base portion to incline Described in one first arm that extends obliquely, and one second arm diagonally downward oppositely extending relative to first arm and connection One first bending part of the first arm and second arm；

One clamping part is connected to the lower end of the elastic arm；

Wherein, the elastic arm is made of thermo bimetal comprising the active layers being bonded to each other and a passive layer, the active layers Coefficient of thermal expansion be greater than the passive layer coefficient of thermal expansion, the elastic arm be heated to the passive layer bend, make the clamping part First device described in clasp.

14. retaining piece as claimed in claim 13, it is characterised in that: the base portion, the elastic arm and the fastener are one Body formed, the retaining piece is made of thermo bimetal.

15. retaining piece as claimed in claim 13, it is characterised in that: the elastic arm also has reversed relative to second arm One second bending part of extension and a third arm diagonally downward and connection second arm and the third arm.

16. retaining piece as claimed in claim 15, it is characterised in that: the base portion is in two vertical plates shape, first bending The opposite sides of plane where portion and second bending part are located at the base portion.

17. retaining piece as claimed in claim 15, it is characterised in that: the clamping part includes a vertically arranged flat part, The upper end of the flat part connects the elastic arm, bends respectively from two sides of the flat part and extends to form a hook portion, the hook The same side of plane where portion and second bending part are located at the flat part in the horizontal direction.