CN201498808U - Electrical connector - Google Patents

Abstract

The utility model discloses a switching device with an electrical connector of which the structure is simple. The electrical connector comprises an insulating main body, conductive terminals accommodated in the insulating main body and a switching device arranged on the insulating main body and can allow at least a signal wire connector to be inserted in and connected. The switching device comprises a first detection terminal, a second detection terminal, an elastic terminal and an insulating block, wherein the first detection terminal and the second detection terminal can be separately arranged; the elastic terminal can generate elastic deformation when the signal line connector is inserted; the insulating block is fixed on the elastic terminal and propped against the signal line connector; and the elastic terminal can be respectively in contact or disconnected with the first detection terminal and the second detection terminal when the signal line connector is inserted in or withdrawn. Furthermore, the first detection terminal and the second detection terminal are electrically connected or disconnected by means of the elastic terminal.

Description

Electric connector

[technical field]

The utility model relates to a kind of electric connector, relates in particular to a kind of electric connector with switching device.

[background technology]

Prosperity along with science and technology, the use of electronic product is more prevalent, make various different electric connector arise at the historic moment, generally speaking, when most electric connector inserts for corresponding plug, can't detect this plug and whether be inserted into the location, thereby other controlled function can't be provided according to this.Therefore, present existing electric connector generally all is provided with the switching device with detecting function.The switching device of these existing electric connectors is traditionally arranged to be first promptly fixing detecting terminal of two conducting terminals and the second movable detecting terminal, the second detecting terminal under the compressing of banjo can with first detect termination contact to reach the function of detecting.

The prior art relevant with the utility model can be consulted in the China's Mainland utility model patent of on April 13rd, 2005 bulletin CN2692882Y number, this patent has disclosed a kind of electric connector, can insert at least one signal wire joint and connect, it comprises insulating body and is located at least one interior switching device of insulating body, Gong the signal wire joint that runs through insulating body before and after described insulating body is provided with and comprises inserts the host cavity that connects, described each switching device comprises the first detecting terminal and the second detecting terminal, the described first detecting terminal comprises the welding foot that extends into the movable part in the spliced eye and extend insulating body, described movable part comprises base portion and the elastic arm that oppositely bends from the base portion end, described elastic arm becomes an inclined-plane and forms a socket district, described socket district is provided with a narrow district and a wide district, and the described second detecting terminal is provided with the weld part that extends into the contact site in the spliced eye and extend insulating body; The position of described contact site is up and down corresponding to wide district, described electric connector also is provided with socket and is fixed in collets in the socket district, banjo will compress collets when inserting, make sense terminal of winning realize detecting with the second detecting termination contact, yet, also need other operation oppositely to bend during this first detecting terminal moulding, increased the manufacturing cost and the first detecting terminal complicated integral structure, consumptive material is many, and the elastic properties of materials to the first detecting terminal requires high simultaneously.

Therefore, at above-mentioned technical problem, be necessary to provide a kind of structure improved electric connector that has, to overcome above-mentioned defective.

[utility model content]

The electric connector that provides a kind of switching device simple in structure is provided the purpose of this utility model.

For reaching above-mentioned purpose, the utility model adopts following technical scheme: a kind of electric connector, can insert at least one signal wire joint and connect, it comprises: insulating body, be contained in the conducting terminal in the insulating body and be located at switching device on the insulating body, described insulating body runs through insulating body before and after being provided with and in order to accommodate the spliced eye of signal wire joint, described switching device comprise that branch is arranged first, the second detecting terminal, the collets that extend in the spliced eye and the flexible terminal of strain can take place when signal wire joint inserts and be fixed on the flexible terminal and can compress mutually with signal wire joint, described flexible terminal can be respectively with first when signal wire joint inserts or extracts, second detecting termination contact or the disconnection, and then use flexible terminal and make first, form between the second detecting terminal and electrically conduct or disconnect.

Compared with prior art, the flexible terminal of the utility model electric connector and first, second sense terminal minor structure are simple, easily manufactured, have saved manufacturing cost; The utility model electric connector is realized electrically conducting between first, second detecting terminal by flexible terminal simultaneously, so, the switching device overall structure is simply novel, and first, second detecting terminal can utilize the raw material metal that elasticity is relatively poor and price is lower in the utility model electric connector, helps further saving manufacturing cost.

[description of drawings]

Fig. 1 is the three-dimensional combination figure of the utility model electric connector.

Fig. 2 is the three-dimensional combination figure of another angle of Fig. 1.

Fig. 3 has the rear side schematic diagram of conducting terminal and switching device for the utility model electric connector insulating body fixing.

Fig. 4 is the three-dimensional exploded view of the utility model electric connector.

Fig. 5 A is the flexible terminal of the utility model electric connector and the three-dimensional exploded view of collets.

Fig. 5 B is the flexible terminal of the utility model electric connector and the three-dimensional combination figure of collets.

Fig. 6 is the three-dimensional exploded view of the utility model electric connector switching device.

Fig. 7 is the three-dimensional exploded view of the utility model electric connector conducting terminal.

Fig. 8 is the front side schematic diagram of the utility model electric connector insulating body.

Fig. 9 is the rear side schematic diagram of the utility model electric connector insulating body.

[embodiment]

See also Fig. 1 to shown in Figure 9, the utility model electric connector 100 connects in order to be installed on circuit board (not shown) and to go up and can insert for two signal wire joints (not shown), described electric connector 100 comprises insulating body 1, be contained in conducting terminal 2 in the insulating body 1, be located at switching device 3 on the insulating body 1, be installed on the front end of insulating body 1 the collar 4, be installed on insulating body 1 the rear end positioning seat 5 and be coated on the insulating body 1 and with positioning seat 5 shielding casing 6 of buckle mutually.

See also Fig. 8 and shown in Figure 9, present embodiment electric connector 100 is set to stacked structures, and described insulating body 1 comprises that the discontinuous columniform docking section 11 that the front end of the main part 10 that roughly is cuboid, autonomous body 10 further protrudes out forward reaches the spliced eye 12 that runs through docking section 11 forward and run through main part 10 backward.The described collar 4 is socketed on the docking section 11.Described main part 10 is provided with and is the two parts that pile up setting up and down.The described collar 4, docking section 11 all are set to two with spliced eye 12.Described main part 10 comprises the front end face 101 that is positioned at front end and is positioned at the rear end and the rear end face 102 relative with front end face 101, second draw-in groove 104 that described front end face 101 is concaved with the bottom that is positioned at spliced eye 12 and first draw-in groove 103 that is connected with spliced eye 12 and a side that is positioned at spliced eye 12 and is connected with spliced eye 12.The rear end of described main part 10 be positioned at spliced eye 12 around be respectively equipped with some terminal containing slots 105 in order to fixed conductive terminals 2 and switching device 3, described terminal containing slot 105 is connected with spliced eye 12.The bottom of described main part 10 is provided with and extends back main part 10 and in order to the caulking groove 106 of fixing positioning seat 5.The rear end of described main part 10 is provided with boss 107, and described boss 107 is provided with some spaced apart vertical grooves 108 in order to location conducting terminal 2 and switching device 3.

See also shown in Figure 7, described conducting terminal 2 is set to two groups, it comprises the first conducting terminal group and the second conducting terminal group, and the described first conducting terminal group is corresponding to the spliced eye 12 of insulating body 1 upside, and the second conducting terminal group is corresponding to the spliced eye 12 of insulating body 1 downside.Described first, second conducting terminal group includes first conducting terminal 21 and second conducting terminal 22, the shared earth terminal 23 of described first, second conducting terminal group.

First conducting terminal 21 of the described first conducting terminal group comprises contact terminal 24 and the conversion terminal 25 that was arranged in 24 minutes with contact terminal, described contact terminal 24 comprises the location division 241 that is fastened in second draw-in groove 104, self-align 241 elasticity first contact site 242 that extends along the bending of signal wire joint direction of insertion, from further first junction 243 that extends of first contact site, 242 extending ends and self-align 241 elasticity second contact site 244 that is positioned at first contact site, 242 upper ends that further extends along the signal wire joint direction of insertion, described first contact site 242 and second contact site were arranged in 244 minutes, described second contact site 244 and location division 241 coplanes.The lateral margin of described location division 241 is provided with some clamping parts 2410 so that location division 241 firm being fastened in second draw-in groove 104.Described conversion terminal 25 comprises slab construction and is fastened in second junction 252 that location division 251 in the terminal containing slot 105, self-align 251 upwards vertical bending of medial margin extends and self-align 251 rear end bends the weld part 253 of extension downward vertically.When signal wire joint does not insert, described second contact site 244 presses on the outer surface of second junction 252, do not contact between described first junction 243 and second junction 252, when signal wire joint inserted, described first junction 243 outwards compressed on the inner surface of second junction 252 so that the signal of telecommunication is transferred on the conversion terminal 25.

Described second conducting terminal 22 comprises that first elastic portion 222 that the location division 221 that is fastened in the terminal containing slot 105, self-align 221 front end extend forward, self-align 221 front end bend second elastic portion 223 of extension and the weld part 224 that self-align 221 rear end bends extension downward vertically forward, and the formation certain clearance can be swung with second elastic portion 223 when signal wire joint inserts with the elasticity that increases by second elastic portion 223 between described first elastic portion 222 and second elastic portion 223.The front end of described second elastic portion 223 has the 3rd junction 225 that can compress mutually with signal wire joint that inwardly protrudes out when signal wire joint inserts, above-mentioned location division 221, second elastic portion 223 and the 3rd junction 225 are laminated structure and in the same plane.

Described earth terminal 23 is for being wholely set, it is roughly the laminated structure of " E " shape, described earth terminal 23 comprises the weld part 234 of location division 231, self-align 231 first, second elastic portion 232,233 that be arranged in parallel up and down of extending forward and self-align 231 bending extension downwards, and the end of described first, second elastic portion 232,233 is provided with first, second contact site 2321,2331 that protrudes out downwards.

The structure of the structure of the described second conducting terminal group and the first conducting terminal group is basic identical, the main distinction is: the weld part 253 of the conversion terminal 25 of the described second conducting terminal group is that self-align 251 front end bends downward vertically to extend and forms, the weld part 224 of second conducting terminal 22 of the described second conducting terminal group is that directly self-align 221 front end bends downward vertically to extend and forms, and second conducting terminal 22 of the described second conducting terminal group does not have second conducting terminal, 22 described first elastic portion 222 in the first conducting terminal group.

See also Fig. 5 A, Fig. 5 B and shown in Figure 6, described switching device 3 comprises two switching devices 3 up and down that are retained on respectively in the main part 10, and these two switching device 3 structures are basic identical, thus following only to wherein one group describe in detail.Described switching device 3 comprises the first detecting terminal 31 that branch is arranged, the second detecting terminal 32, the insulate front end of body 1 extends in the spliced eye 12 and flexible terminal 33 moving up and down and the collets 34 that are fixed on the flexible terminal 33 and can compress mutually with signal wire joint when signal wire joint inserts certainly, described first, second detecting terminal 31,32 structures symmetry on left and right directions, so be provided with, described first, second detecting terminal 31,32 can utilize same set of die stamping to form on same sheet metal, helps saving manufacturing cost.Described flexible terminal 33 can contact with first, second detecting terminal 31,32 respectively or disconnect when signal wire joint inserts or extracts, and then uses flexible terminal 33 and make first, second detect between terminal 31,32 formation to electrically conduct or disconnect.

The described first detecting terminal 31 comprises first fixed part 311, be provided with at interval with first fixed part 311 and first contact part 312 parallel with first fixed part 311, connect first connecting portion 313 of first fixed part 311 and first contact part 312 and first welding foot 314 that bends extension from first fixed part, 311 rear ends downward vertically, wherein, described first fixed part 311 is provided with first clamping part 315 that extends forward and be positioned at first contact part, 312 front ends, described first contact part 312 is positioned at the inboard of first fixed part 311, described first fixed part 311, first contact part 312, first connecting portion 313 and first clamping part 315 are positioned on the same plane.

The described second detecting terminal 32 comprises second fixed part 321, be provided with at interval with second fixed part 321 and second contact part 322 parallel with second fixed part 321, connect second connecting portion 323 of second fixed part 321 and second contact part 322 and second welding foot 324 that bends extension from second fixed part, 321 rear ends downward vertically, wherein, described second fixed part 321 is provided with second clamping part 325 that extends forward and be positioned at second contact part, 322 front ends, described second contact part 322 is positioned at the inboard of second fixed part 321, described second fixed part 321, second contact part 322, second connecting portion 323 and second clamping part 325 are positioned on the same plane.

Described flexible terminal 33 is to form from a sheet metal punching press, and is simple in structure, helps saving manufacturing cost.Described flexible terminal 33 comprises the base portions 331 that are fixed in first draw-in groove 103 and extends in the spliced eye 12 and the elastic arm 332 of elastically deformable from base portion 331 ends.Described base portion 331 is provided with some usefulness so that base portion 331 firmly is fastened in the hangnail 3311 in first draw-in groove 103.Described elastic arm 332 comprise elastic arm 332 front ends and the rake 333 that extends obliquely backward from base portion 331, elastic arm 332 rear end tails and can detect terminal 31,32 contacts or the clinch 334 that disconnects and be connected clinch 334 and rake 333 and the holding parts 335 between clinch 334 and rake 333 with first, second.Angle between described clinch 334 and the rake 333 is an acute angle, and described holding parts 335 is higher than clinch 334, and described collets 34 are fastened on the holding parts 335.Described elastic arm 332 comprises that also the bending extension connects the bending part 336 of clinch 334 and holding parts 335.Described clinch 334 is provided with somely can detect the projection 3341 that terminal 31,32 contacts or disconnects with first, second.Described holding parts 335 comprises first of the broad that is positioned at the rear and front end, second connecting portion 3351,3352 and be positioned at first, second connecting portion 3351, narrower holding section 3353 between 3352, described first connecting portion 3351 links to each other with base portion 331, described second connecting portion 3352 links to each other with bending part 336, described first connecting portion 3351 is extended with two first block wings 3354 that lay respectively at 3353 both sides, holding section downwards, described second connecting portion 3352 is extended with two second block wings 3355 that lay respectively at 3353 both sides, holding section downwards, and described first block wing 3354 and second block wing 3355 insert or extract direction and move along signal wire joint in order to prevent collets 34.

Connect and be each other the first and the second portion of ladder-type structure before and after described collets 34 are provided with, described collets 34 comprise the cascaded surface 343 that front end face 341 at front end, the rear end face 342 in rear end relative with front end face 341 reach between front and rear end 341,342.Described collets 34 be provided with the location notch 344 that runs through front end face 341 and cascaded surface 343, the vertical first side 345 that is connected front end face 341 and cascaded surface 343 and is communicated with location notch 344 and vertical be connected front end face 341 and rear end face 342 and with location notch 344 disconnected second sides 346.Described holding section 3353 is fastened in the location notch 344, and described first side 345 sets to the concave and is formed with the trumpet-shaped installing port 3451 that is communicated with location notch 344 and installs with guiding holding section 3353.The bore of described installing port 3451 is less than the thickness of holding section 3353, utilize the elasticity at installing port 3451 places that holding section 3353 is snapped in the location notch 344, so stoped holding section 3,353 345 to be moved towards the first side, simultaneously, described second side 346 is not communicated with location notch 344, so stoped holding section 3,353 346 to be moved, like this, guaranteed that collets 34 can not be moved on perpendicular to the signal wire joint direction of insertion towards the second side.Described first, second block wing 3354,3355 compresses mutually with front end face 341 and cascaded surface 343 respectively, so, has guaranteed that collets 34 can not be moved on the signal wire joint direction of insertion.But described collets 34 be provided with the acclivitous inclined-plane 347 that the steering signal wire terminal that is positioned in the first inserts and be positioned on the second portion and from the inclined-plane extension 348 of 347 levels that extend back so that enough areas that compresses to be provided to signal wire joint.

In the present embodiment, described first, second detecting terminal 31,32 is in the state of often opening when signal wire joint does not insert, promptly when signal wire joint does not insert, not electrically contact between the described first detecting terminal 31 and the second detecting terminal 32, after signal wire joint inserts, described collets 34 are compressed the back by signal wire joint and drive flexible terminal 33 generation strains, make flexible terminal 33 contact with first, second detecting terminal 31,32 respectively, and then make the formation realization detecting function that electrically conducts between first, second detecting terminal 31,32.Certainly, in other embodiments, described first, the second detecting terminal 31,32 can be set to normally off, promptly when signal wire joint does not insert, be in the state of electrically conducting between the described first detecting terminal 31 and the second detecting terminal, after signal wire joint inserts, described collets 34 are compressed the back by signal wire joint and drive flexible terminal 33 generation strains, make flexible terminal 33 and first, the second detecting terminal 31,32 contacts, and then make and win, the second detecting terminal 31,32 by short circuit, and first, the second detecting terminal 31, there is not electric current to pass through to realize detecting function between 32.

Described positioning seat 5 comprises the base station 51 of vertical setting and holds plate 52 by what the lower edge front end of base station 51 extended base station 51 forward.Described base station 51 is ladder-like arranged, its inboard is provided with a step 511 and runs through the vertical slit 512 in order to location earth terminal 23 that holds plate 52 downwards, described step 511 is provided with some in order to locate the Vertical Channel 513 of the first conducting terminal group and first, second detecting terminal 31,32, the described plate 52 that holds is provided with somely in order to locate the through hole 520 of the second conducting terminal group and first, second detecting terminal 31,32, and the described bottom that holds plate 52 is provided with the some reference columns 521 that match with circuit board installing hole (not shown).

Described shielding casing 6 comprises butt joint wall 61 on the front end face 101 that is posted by main part 10, docks two side 62 that wall 61 both sides extend back and the roof 63 that 62 upper ends are bent to form in opposite directions from the two side certainly.Described butt joint wall 61 be provided with insulating body 1 on two docking sections, 11 corresponding through holes 611.The top of described butt joint wall 61 is provided with backward the holding part 612 that vertical bending is extended, and described holding part 612 is held on the outer surface of roof 63 in order to prevent that roof 63 from producing distortion.Described roof 63 and 62 rear ends, two side are respectively equipped with some trips 621 that interlock and hold with positioning seat 5.Described two side 62 is extended with a pair of installation foot 622 respectively downwards so that the utility model electric connector 100 is fixed on the circuit board.

During 100 assemblings of the utility model electric connector, at first, conducting terminal 2 and switching device 3 are assembled on the insulating body 1, make first, second fixed part 311,321 of the location division 251 of location division 221, conversion terminal 25 of described second conducting terminal 22 and first, second detecting terminal 31,32 hold mutually with the corresponding terminal containing slot 105 in insulating body 1 rear end respectively, the location division 241 of described contact terminal 24 and the base portion 331 of flexible terminal 33 hold mutually with second draw-in groove 104 and first draw-in groove 103 of insulating body 1 front end respectively.The weld part 224 of described second conducting terminal 22, the weld part 253 and first of conversion terminal 25, the second detecting terminal 31,32 first, second welding foot 314,324 extend insulating body 1 respectively downwards, wherein, the weld part 224 of second conducting terminal 22 in the described the first terminal group, the weld part 253 and first of conversion terminal 25, the second detecting terminal 31,32 first, second welding foot 314, in 324 passages 513 that all are contained on the positioning seat 5, the weld part 224 of second conducting terminal 22 in described second terminal group, the weld part 253 and first of conversion terminal 25, the second detecting terminal 31,32 first, second welding foot 314, in 324 through holes 520 that all are contained on the positioning seat 5.First contact site 242, first elastic portion 232 and second elastic portion 223,233 of described each conducting terminal 2 all protrude in the spliced eye 12, and the elastic arm 332 of described each flexible terminal 33 protrudes in the spliced eye 12.First, second contact part 312,322 of described first, second detecting terminal 31,32 is positioned on the same horizontal plane, observe from insulation body 1 rear end, be arranged in jointly on the same vertical plane corresponding to the weld part 224,253 of the conducting terminal 2 of each spliced eye 12 and first, second welding foot 314,324 of switching device 3.Secondly, positioning seat 5 is immobilizated in insulating body 1 rear end, the described caulking groove 106 that holds plate 52 and insulating body 1 is snap fit mutually, and first, second welding foot 314,324 of the weld part 224,253 of described conducting terminal 2 and switching device 3 is contained in respective channel 513 and the through hole 520 respectively and extends and holds plate 52.Then, the collar 4 is socketed on the docking section 11, last, shielding casing 6 is coated on the insulating body 1, described docking section 11 is passed the through hole 611 on the butt joint wall 61 forward, and described trip 621 is held in the rear end of positioning seat 5, can prevent that shielding casing 6 relative insulating bodies 1 from becoming flexible.

When the utility model electric connector 100 cooperates with signal wire joint, after signal wire joint inserts, it compresses mutually with the 3rd junction 225 of conducting terminal 2 and first contact site 242 and collets 34 respectively and contacts, after being compressed by signal wire joint, moves laterally first contact site 242 of described contact terminal 24, can drive first junction 243 contacts with second junction 252, so, can make contact terminal 24 use conversion terminal 25 realizes electrically connecting with circuit board; Described collets 34 are compressed the back by signal wire joint and move along vertical signal wire terminal direction of insertion, flexible terminal 33 is also moved along vertical signal wire terminal direction of insertion, because first, second contact part 312,322 is in the same plane, therefore the projection 3341 on the clinch 334 of flexible terminal 33 contacts with first, second contact part 312,322, make to form between first, second detecting terminal 31,32 to electrically conduct, thereby realize detecting function.First, second contact part 312,322 allows a spot of strain or does not have elasticity on vertical signal wire terminal direction of insertion.

The flexible terminal 33 of the utility model electric connector 100 is simple in structure, can form from a sheet metal punching press, helps saving manufacturing cost.The utility model electric connector 100 is used flexible terminal 33 and is made to form to electrically conduct between first, second detecting terminal 31,32 and reach the effect of detecting, this kind novelty simple in structure.In the utility model electric connector 100, elastic performance to first, second detecting terminal 31,32 is less demanding, so can utilize elasticity relatively poor or do not have elasticity and a lower raw material metal of price, and first, second detecting terminal 31,32 symmetrical configuration, can utilize same set of mould to carry out moulding, help saving manufacturing cost.

Claims (10)

1. electric connector, can insert at least one signal wire joint and connect, it comprises: insulating body, be contained in the conducting terminal in the insulating body and be located at switching device on the insulating body, described insulating body runs through insulating body before and after being provided with and in order to accommodate the spliced eye of signal wire joint, it is characterized in that: described switching device comprise that branch is arranged first, the second detecting terminal, the collets that extend in the spliced eye and the flexible terminal of strain can take place when signal wire joint inserts and be fixed on the flexible terminal and can compress mutually with signal wire joint, described flexible terminal can be respectively with first when signal wire joint inserts or extracts, second detecting termination contact or the disconnection, and then use flexible terminal and make first, form between the second detecting terminal and electrically conduct or disconnect.

2. electric connector as claimed in claim 1, it is characterized in that: described flexible terminal comprises the base portion that is fixed in the insulating body front end and extends in the spliced eye and elastic arm moving up and down from the base portion end along the signal wire joint direction of insertion that the front end of described elastic arm is provided with the clinch that can detect termination contact or disconnection with first, second.

3. electric connector as claimed in claim 2 is characterized in that: described clinch is provided with the projection that can detect termination contact or disconnection with first, second.

4. electric connector as claimed in claim 2 is characterized in that: described elastic arm is provided with the holding parts that is positioned at the clinch rear end and links to each other with clinch, and described holding parts is higher than clinch, and described collets are fastened on the holding parts.

5. electric connector as claimed in claim 4 is characterized in that: described elastic arm is provided with the rake that is inclined upwardly and extends and link to each other with holding parts from the base portion end, and the angle between described clinch and the rake is an acute angle.

6. electric connector as claimed in claim 4 is characterized in that: described collets are provided with the forward and backward location notch that runs through collets, and described holding parts is fastened in the location notch.

7. electric connector as claimed in claim 6, it is characterized in that: described collets are provided with the front end face that is positioned at the location notch front end and are positioned at the cascaded surface of location notch rear end, the two ends of described holding parts are extended with first block wing and second block wing respectively downwards, and described first, second block wing compresses with the location collets mutually with front end face and cascaded surface respectively.

8. electric connector as claimed in claim 7, it is characterized in that: described collets comprise the first side that is positioned at collets one side and is connected with front end face and cascaded surface, and described first side sets to the concave and is formed with the installing port that is communicated with location notch and installs with the guiding holding parts.

9. electric connector as claimed in claim 1 is characterized in that: described first, second detecting terminal has first, second contact part that contacts or disconnect with flexible terminal respectively, and described first, second contact part is located in the same horizontal plane.

10. electric connector as claimed in claim 1, it is characterized in that: the structure of described first, second detecting terminal is symmetrical on left and right directions, first contact part that the described first detecting terminal comprises first fixed part that fixes with insulating body, be provided with at interval with first fixed part and be connected to first contact part and first connecting portion of first fixed part, one end, described first fixed part, first contact part and first connecting portion are in the same plane.

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