CN1069146C

CN1069146C - Electric Component part with terminal and mounting structure thereof

Info

Publication number: CN1069146C
Application number: CN98100305A
Authority: CN
Inventors: 安田冬树
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1995-06-15
Filing date: 1998-01-05
Publication date: 2001-08-01
Anticipated expiration: 2016-06-14
Also published as: TW444523B; KR970003317A; FR2735608B1; CN1039952C; DE19623802C2; FR2735608A1; ITMI961221A0; FR2737804A1; FR2737804B1; ITMI961221A1; DE19623802A1; TW404151B; CN1139283A; CN1202715A; KR100230525B1; MY126630A; IT1284022B1

Abstract

The switch comprises a casing (5), in which a common contact connection (3), a fixed contact connection (1, 2), and a contact (4) for the external connection are formed in a monolithic way. An isolating lever (6) is provided so as to perform a pivotal movement w.r.t. the casing (5). A movable contact (7) is mounted on the lever, so that is in a flexible contact with the common contact connection, depending on the pivotal movement of the lever. A torsion screw spring (8) is provided for providing a continuous pressure on the lever in a predetermined direction. The area of the movable, which is in contact with the common contact connection is formed as a disc-shaped, flexible glide surface (7c), which is bent at and lower are at his free end.

Description

The electric component and the mounting structure thereof that have joint

The present invention is dividing an application of Chinese patent application 96 1 06603.2.

The present invention relates to a kind of electric component that has joint, here, be used for the outside joint that connects and be welded on solder areas on the printed circuit board (PCB), it stretches out from a box body bottom side portion of being made by synthetic resin, and along the box side wall rising, to control the protrusion amount of this joint from box body.

The invention still further relates to a kind of electric component mounting structure, this structure can be reliably with on the synthetic resin box body of for example hook switch and so on switch with the ground connection figure of static discharge to the printed circuit board (PCB) on, whether be placed on the phone body to detect receiver, because above-mentioned switch is to be assemblied in the phone body.

Fig. 8 is a fragmentary cross-sectional view, and it represents the universal instance of this form belt lacing electric component.

In this drawing, what numeral 11 was represented is a box body, pole plate for example, what numeral 12 was represented is to be used for the outside joint that connects, here joint 12 draws the bottom margin part 11a that the metallic plate that stretches out from the inside of box 11 is bent to box body 11, and make hook shape, on one side of the bottom of hook, have flat part 12a and along the sidewall 11b projection portion projecting 12b of box body 11.When partly being installed in this electric component on the printed circuit board (PCB) 13, the solder of coating paste in the solder district 14 of printed circuit board (PCB) 13, and, after the flat part 12a with joint 12 is placed on the paste solder, utilize of the infrared radiation effect of paste solder by reflow ovens, make described paste solder fusing, then the paste solder can be bonded on the joint 12.As a result, as shown in Figure 8, on by the eutectic welding bed of material 15 that melts caking that each solder produces, joint 12 and solder district 14 are on electric and mechanically be connected to each other.

Like this, make up hook shape by being used for the outside joint 12 that connects, can control joint 12 has an advantage from the electric component of box body 11 overhangs, promptly can reach higher packing density, can do lessly because comprise the overall dimensions of joint 12.

Fig. 9-12 is depicted as electric component mounting structure commonly used, and this mounting structure is applied to the example on middle hook switch such as phone and so on the switch for it.

Electric component shown in these figure has a resinous box body 25, and the inside of box body 25 is hollow, and to make its upper surface be opening; Be provided with the switch sections (not shown) that is used for commutation circuit in the inside of box body, protruding from the bottom of box body, be provided with the conductive contact 24a that assigns to from switch portion, 24b, 24c.In addition, lever 26 is bearing on the left side and the right sidewall 25d of described box body 25, can rotate, and under the effect of spring (not shown), can return automatically.

In addition, as shown in figure 12, lid 29 metallic plates by steel plate system make, and for example utilize compacting and bending to make, and the upper surface in order to the unlatching that covers box body 25 covers 29 electroplating surfaces with tin, in order to improve soldered; Lid 29 comprises that being located at the dull and stereotyped 29f of engagement goes up, is used to make the engaging hole 29g that covers 29 contact box bodys 25, from two sides of upper surface portion 29e, reclinate toward each other shank divides 29a and forms, is used for the sweep 29c that is connected with printed circuit board (PCB) 30 by outwardly-bent the meeting at right angles of the distal portions that makes leg 29a.Here, when lid 29 contacted with described box body 25, the curved surface of sweep 29c was in described

conductive contact

24a, and 24b is on the same plane of 24c.

In addition, face described conductive contact 24a at printed circuit board (PCB) 30,24b, the part of 24c is provided with solder district 31a～31c, makes described

conductive contact

24a, 24b, 24c can be in the same place with printed circuit board (PCB) 30 solderings.The width of solder district 31a～31c makes bigger than the width of conductive contact 24a～24c of described electric component A, and its size should not cause the solder of fusing to flow out on the printed circuit 30.

Moreover described printed panel 30 is being provided with solder district 32a on the part of lid 29 sweep 29c, and like this, described sweep 29c can be in the same place with printed circuit board (PCB) 30 solderings.The width of solder district 32a is made than the width of the sweep 29c of described lid 29 more greatly, and its size should not cause the solder that dissolves to flow out.

When being installed in this common electric component A on the printed circuit board (PCB) 30, as shown in figure 11, on the solder district 31a～31c and 32a of described printed circuit board (PCB) 30, coating paste solder, and, the external conductive joint 24a～24c of described electric component A and the sweep 29c of lid 29 are placed on the paste solder.After this, the printed circuit board (PCB) 30 that utilizes conveyer belt to make described electric component A is installed thereon is by the reflow ovens (not shown), by the infrared radiation that produces, with described paste solder fusing, therefore, by the eutectic welding bed of material 33, described electric component A and printed circuit board (PCB) 30 electric going up are in the same place with mechanically being connected to each other by the paste caking that solder produces that melts.

Utilize described electric component A, when taking off from phone body (not shown) owing to microphone is placed on the phone body or microphone, when causing lever 26 revolutions, the circuit in the box body 25 just are switched.Here, because the operation part 26a of the lever 26 by making described electric component A rotates, make the (not shown)s such as telephone set that used above-mentioned electric component A on it realize that the circuit of described electric component A switches, and the rotation of operation part is and takes off/put the microphone that is located on the telephone set and interrelate, so people's arm will be near described electric component A, and described electric component A is in the environment of meeting generation static, and this is because the electrostatic induction effect of human body institute static electrification causes.Surpass the amount that is predetermined when the quantity of electric charge of described static, if with conductor, metal for example, be placed near near the charged insulating material, then static presents a kind of character, even be not connected on electric with described charged insulator such as metal one class conductor, electric discharge phenomena can appear the space from described insulator to nearest conductor, the static of described charged insulator is discarded on the described nearest conductor that is made of metal.

Because above-mentioned reason, insulator, the box body 25 that promptly is formed from a resin has static, and when the electrostatic charge on the box body 25 is emitted between the circuitous pattern 31a～31c of the box body 25 of described electric component A and printed circuit board (PCB) 30, can produce a problem, promptly the circuit in described electric component A abnormality occurs or is being assemblied in other electric component of described electric component A periphery abnormality occurring, and described phone body is had adverse effect.In order not produce this problem, when using common electric component A, inner upper surface for the synthetic resin box body 25 hollow, that upper surface is opened covers with crown cap 29; To this sweep 29c be contacted with the ground connection figure 32 of printed circuit board (PCB) 30, and connect along a right-angle bending part of the outwardly-bent one-tenth of the far-end 29c of the reclinate shank 29a of outer surface of the left and right sides sidewall 25d of described box body 25 by soldering; Then on the box body 25 of described electric component A with static just can be discarded to reliably on the ground connection figure 32 of printed circuit board (PCB) 30.

Yet this must carry out surface treatment, for example will be zinc-plated by all surface of the crown cap 29 of steel plate system, and to improve its surperficial soldered.

In addition, for make on the described box body 25 with static be discarded on the ground connection figure 32 of described printed circuit board (PCB) 30, upper surface portion 29e upper surface, described lid 29 and the sweep 29c that are used to shield box body 25 are made by a metal material, and with printed circuit board (PCB) 30 solderings together; This sweep 29c is the outer surface part 29e that makes from described lid, be bent downwardly from two side relative to one another that the outwardly-bent right angle of the far-end of shank 29a of formation forms, like this, when the metal materials such as steel that are used for described lid 29 are when being made by compacting, YIELD STRENGTH is poor, this just essential wide variety of materials of using.

When the outside jointing 32 of above-mentioned electric component is sent into reflow ovens, its planar section 32a is placed on before fusing on the paste solder, and when in stove, heating, the solder of a certain amount of fusing is bonded on the surface of jut 32b, as shown in Figure 8, the planar section 32a size of joint 32 is short, thereby little with the contact surface of paste solder, and has only fusing solder in a small amount can be bonded on the surface of jut 32b; Therefore, in order to reach the enough soldering strength of joint 32 with respect to printed circuit board (PCB) 33, promptly, require the solder of fusing also to be bonded on the upper surface of lateral parts 32c and planar section 32a for the unlikely reliability that makes the eutectic welding bed of material 35 hinder conduction and mechanical strength.

Yet, under the situation of product commonly used, because the sidewall 31b of the box body 31 of synthetic resin has the character that the solder of the fusing of making leaves, the solder of fusing is bonded on the side surface 32c of planar section 32a of joint 32, this joint 32 is very little from the amount that sidewall 31b stretches out, as shown in Figure 8; Therefore, also be difficult to make the solder of fusing to spread out at the upper surface of planar section 32a, the result, the contact surface between the joint 32 and the eutectic welding bed of material 35 is not enough, thereby produces a problem, promptly is difficult to obtain high reliability.

And for the soldered of the sweep 29c of the shank 29a that improves described lid, all surface of described lid 29 will be through the processing such as a zinc-plated class, and this has just produced the higher problem of electric component A cost that makes.

In addition, in described example commonly used, the sweep 29c that connects, be used for together ground connection figure 32 solderings of described electric component A and printed circuit board (PCB) 30, this sweep 29c makes like this: make from covering two sides of 29 upper surface portion 29e, along the left side of box body 25 and the outer surface of right wall, be bent downwardly the far-end of the shank 29a that forms relative to one another, an outwardly-bent right angle and making.Because this reason, if covering 29 is waited by compacting and to make, then there is another problem, the yield limit that is the material of described lid 29 degenerates, cause cost higher, because described lid 29, comprise the sweep 29c on two sides of upper surface portion 29e of shank 29a and lid 29, integrally make by a block plate.

Consider these problems of prior art, the present invention has been proposed, its objective is provides a kind of electric component and mounting structure thereof that has joint, the present invention can improve the outside weld strength that connects with joint and printed circuit board (PCB), and don't hinder reducing of its size, and can also improve the yield strength of cover material, further to reduce cost.

Above-mentioned purpose of the present invention can reach by following electric component, and electric component comprises one by resinous box body.Constitute a shell, comprise that also is used for an outside joint that connects, it is extend out to the bottom edge part of box body by the inside of box body, and along the box side wall projection, wherein, the solder district soldering of joint and printed circuit board (PCB) is provided with a breach together on the described sidewall of described box body, be used to expose the side surface of the bottom surface portions that is positioned at the described joint on the described bottom edge part.

In addition, electric component mounting structure of the present invention comprises an electric component, and it is made up of following part: plastic described box body; Be located on the box body, be used for the outside conductive contact that connects; Be contained on the described box body and have the crown cap of shank; Wherein, the circuitous pattern soldering of described conductive contact and printed circuit board (PCB) together, and the far-end of described lid leans against on the ground connection figure of described printed circuit board (PCB).

Moreover electric component mounting structure of the present invention comprises an electric component, and it is made up of following part: the described box body that synthetic resin is made; Be used for outside conducting, be located at the conductive contact on the box body; Be contained on the described box body, and have the crown cap of shank; Wherein, the circuitous pattern soldering of described conductive contact and printed circuit board (PCB) together, and the far-end of the shank of described lid is to be provided with like this, makes the distance (x) from the far-end of described shank to the ground connection figure of described printed circuit board (PCB) and is set at x＜y from far-end to the relation between the distance (y) of the circuitous pattern of described printed circuit board (PCB) of the shank of described lid.

Again, electric component mounting structure of the present invention is designed so that the far-end of described shank comes to a point.

In addition, expose in the breach of side surface on box side wall bottom the joint that makes outside connection usefulness, can make the joint side surface in the solder district that is placed on the box side wall outside do longerly; Like this, the solder of fusing is bonded on the side surface of joint in the position of leaving sidewall a little, and the solder of fusing also can spread out on the joint upper surface, make that the contact surface with solder increases greatly.

In addition, the far-end of lid against or near the ground connection figure of printed circuit board (PCB), make on the electric component with static can release reliably, therefore, do not need the far-end of lid and the ground connection figure soldering of printed circuit board (PCB) are in the same place, like this, on material, do not need to carry out processing as a zinc-plated class as lid.

In addition, owing to do not need to have the expensive material of high brazing property, the cost of lid can reduce.

Moreover owing to do not carry out soldering, the amount of used solder can reduce, and does not need the management of soldering.

Now embodiments of the present invention is further illustrated in conjunction with the accompanying drawings.

Fig. 1 is the perspective view of some part of first embodiment.

Fig. 2 represents to have total structure of the switching device of pole plate shown in Figure 1.

Fig. 3 is the front view according to the electric component B of second embodiment of the present invention, and the shank far-end and the ground connection figure of its expression lid contact with each other.

Fig. 4 is the front view according to the electric component B of the 3rd embodiment of the present invention, the shank far-end and the ground connection figure situation very close to each other of its expression lid.

Fig. 5 is for being installed under the state on the printed circuit board (PCB) enlarged drawing of blank area at electric component B according to an embodiment of the invention.

Fig. 6 is the outward appearance perspective view of expression the present invention lid.

Fig. 7 is the part enlarged drawing according to third embodiment of the invention electric component B, and the shank far-end that lid is described is very near the relation of printed circuit board (PCB).

Fig. 8 is the perspective view of some part of expression one conventional example.

Fig. 9 is the perspective view of outward appearance that schematically shows the electric component of another conventional example.

Figure 10 is the electric component of expression one conventional example and the front view of printed circuit board (PCB) soldering state together.

Figure 11 is the part enlarged drawing of the electric component of a conventional example, its expression blank area and printed circuit board (PCB) soldering state together.

Figure 12 is the perspective view of the outward appearance of the lid of expression one conventional example.

Figure 13 is the cross-sectional view according to the major part of the electric component B of first and second embodiment of the present invention, the general structure of its expression the present invention when operation part does not push.

Figure 14 is the cross-sectional view according to the major part of the electric component A of first and second embodiment of the present invention, the general structure of its expression the present invention when operation part pushes.

Switching device generally is made of following part shown in these accompanying drawings: first fixing contact joint 1, the second fixing contact joint 2, and public contact joint 3 and outside jointing 4, they form a joint group; A box body 5 of making by synthetic resin, its shell forms a pole plate body, is obtained by Unitarily molded joint group 1-4; One lever of making by synthetic resin 6, it is provided with an operating portion 6a and a rotating shaft 6b, and described lever is placed in the box body 5, so that can rotate therein; A moving contact point 7, this moving contact point 7 is connected on the lever 6, and it is provided with a clamp shape contact site 7a and a bend-plate spring shape sliding part 7b; One helical torsion spring 8 is used for pushing continuously lever 6 towards its direction motion (as Fig. 2 clockwise direction) of reversing; With a lid 9, for box body 5 provides a lid, so that portion pushes down and maintain helical torsion spring 8 from it; Along with lever 6 rotates, the contact site 7a of moving contact point 7 just moves to first or second and fixedly contacts joint contact or disengaging, and its sliding part 7b then slides on the public contact head 3.

Particularly, when the operating portion 6a that is not applied to lever 6 when downward loading goes up, because the elastic force pressure of helical torsion spring 8, the lever of this switching device remains on the state of Fig. 2, so the contact site 7a of moving contact point 7 just fixedly contacts joint 1 and keeps in touch with first, thereby, also just form a circuit, make the first fixing contact joint 1 contact the joint conducting with public by moving contact point 7.In addition, under this state, when downward loading is applied on the operating portion 6a, and lever 6 heads on helical torsion spring 8 inhour when rotating, as shown in Figure 2, then contact site 7a leaves the first fixing contact joint 1, and fixedly contacts joint 2 with second, so just be transformed into a circuit, this circuit makes the second fixing contact joint 2 contact the joint conducting by moving contact point 7 with public.Therefore, from this switching of circuit, just might detect loading and whether act on the contact site 7a.

As shown in Figure 2, this switching device is an electric component part, wherein many outside jointings 4 that obtain by the metallic plate bending, extend out to the bottom edge part 5a of box body 5 from first and second fixing contact joints 1,2, and, solder district 14 solderings of public contact joint 3 and printed circuit board (PCB) 13 together, as shown in Figure 1, outside jointing 4 makes the hook shape that has planar section 4a on its bottom, and ledge 4b is along the sidewall 5b projection of box body 5.In other words, in the time will being installed in switching device on the printed circuit board (PCB) 13, at first the solder of paste to be coated in the solder district 14 of printed circuit board (PCB) 13, after the planar section 4a with outside jointing 4 is placed on the paste solder, make outside jointing 4 pass through reflow ovens, paste solder fusing, the eutectic welding bed of material 5 that produces by solder caking by fusing, with outside jointing 4 and solder district 4 on electric and mechanically couple together.

As shown in Figure 1, in the present embodiment, in order to improve the reliability of the outside jointing 4 of soldering, on the sidewall 5b of box body 5, be respectively equipped with breach 5c in the face of on two sides of joint 4, and be positioned at the joint 4 at bottom edge part 5a place, the side surface 4c of its bottom exposes in breach 5c.Particularly, by this breach 5c is set, the length of the side surface 4c of joint 4 planar section 4a can increase, and can not increase the amount of stretching out from box body 5 from outside jointing 4, joint 4 can be placed in the solder district of sidewall 5b outside of box body 5, as shown in Figure 1, even the sidewall 5b in breach 5c makes the solder of fusing away from the there, the solder of fusing is at the part place of leaving sidewall 5b a little, be bonded on the side surface 4c of planar section 4a, for this reason, the solder of fusing more may spread out, and also reaches the upper surface of planar section 4a, therefore, the contact area of solder can increase greatly.Correspondingly, switching device can make, make joint 4 securely with solder district 14 solderings of printed circuit board (PCB) 13 together, simultaneously by controlling outside jointing 4 from box body 5 overhangs, can reduce size and adapt to high-density mounting, therefore, with common product comparison, conduction reliability after the installation and mechanical strength are all improved greatly.

Should be noted that the present invention also can be applicable to switching device electric component part in addition.

The embodiment of the mounting structure of electric component part of the present invention will be described below.

At first, will utilize Fig. 3 to 7 that embodiments of the invention are described.

Electric component part B shown in these figure has the box body of being made by synthetic resin 35, and its shape makes the inner hollow box-shape of opening wide with upper surface that is.Box body 35 has jut 35e, is used for being pressed into the lid 45 that the back will illustrate.In addition, on the left side of box body 35 and right side wall 35d, be provided with supporting part 35f, be used to support gyroaxis 36b, this explanation in the back of naming a person for a particular job as the lever 36 of gyration.

When rectangular first permanent joint 31 of thin plate embeds among the base plate 35g of the box bodys 35 that described synthetic resin forms by mold pressing, this joint 31 integrally is attached to the inside of described box body 35, in addition, fixing joint 31 has whole making thereon, be used for the outside conductive contact 34a that connects, conductive contact 34a is drawn by the left and right sides sidewall 35d of box body 35, and with the same plane, bottom surface at described base plate 35g rear portion on, outstanding from box body 35 on the side surface direction of the weak point of box body 35.

In addition, second permanent joint 32 be shaped as thin sheet form with negative area, and be placed on the outside of permanent joint 31, thereby on the excircle of described first permanent joint 31, be provided with certain clearance.Under this state, described permanent joint 32 embeds among the base plate 35g and rear wall 35b of described box body 35, it is integrally depended in the above, moreover, permanent joint 32 has an integral body to be done thereon, is used for the outside conductive contact 34b that connects, and conductive contact 34b draws from the left and right sides sidewall 35d of box body 35, and outstanding from box body 35, and similar with the described conductive contact 34a on the same plane, bottom surface of the core of described base plate 35g.

In addition, inside at box body 35, on base plate 35g, make to have hemispheric public contact joint 33, public contact joint 33 embeds among the base plate 35g of described box body 35 facing to front side wall 35a, so that integrally attaching public contact joint 33 thereon has with its integral body and makes, be used for the outside conductive contact 34c that connects, conductive contact 34c draws from the left and right sides sidewall 35d of box body 35, and it is outstanding from box body 35, with with the same plane, anterior bottom surface of base plate 35g on described conductive contact 34a, 34b is similar.

Here, though do not illustrate, first fixedly the fixing contact of 31, the second of contact terminals joints 32 all form a pair of with public each that contacts in the joint 33 with another joint that is placed on box body 35 inside abreast.

In addition, lid 45 is by making at the metallic plate of compacting and curved plates system, as shown in Figure 6, covering 45 and comprise: the upper surface portion 45e that is used to cover box body 35 open upper surfaces; Place the jut 45d of spring, it is used for the following torsion-coil spring that will illustrate 38 is placed in the inboard of upper surface portion; From the front and back part of the upper surface portion 45e of described lid 45, by the dull and stereotyped 45f of this relatively reclinate engagement; Engaging hole 45g is used for that lid 45 is pressed into box body 35 and makes it be fitted in box body; On the short side direction of upper surface portion 45e, the shank 45a of bending extension and the far-end 45b of shank 45a under the side direction.Here, the length setting to the far-end 45b of shank 45a is that in the time of on will being contained in described box body 35, far-end and described conductive contact 34a～34c are on same plane.Moreover at the inner face of lid 45 upper surface portion 45e, the spring that is provided with the torsion-coil spring 38 that will illustrate below being used to lay is placed jut 45d.

In addition, lever 36 is made by synthetic resin, and comprises: the operation part 36a before length on the extreme direction, and at the rotation axis 36b of core, towards the spring mounting hole 36c of rotation axis 36b back be installed in moving contact 37 on lever 36 rear sides.

The moving contact 37 that is installed on the described lever 36 is to be provided with like this, and it makes the contact portion 37a of clip shape clamp the

permanent joint

31 or 32 of described plate-shaped, forms the turning circuit by permanent joint 31 or 32.Here, slipper 37b bends to the arc of a center of rotation on the rotation axis 36b of lever 36, therefore, can contact with the described public joint 33 that contacts continuously.

In addition, torsion-coil spring 38 is provided with a far-end at one end thereof 38a, and it bends to the right angle.Windup-degree between a described end 38a and the free end 38b is set for, and the operation part 36a of lever 36 is pushed continuously along clockwise direction.

On printed circuit board (PCB) 46 part relative, be provided with solder district 41a～41c with conductive contact 34a～34c of described electric component part B, make described conductive contact 34a～34c can with printed circuit board (PCB) 46 solderings together.The width of solder district 41a～41c is wideer than the width of conductive contact 34a～34c, and its size is arranged to make this width that the solder of fusing is spilled on the printed circuit board (PCB) 46.

In addition, described printed circuit board (PCB) 46 has a ground connection figure 42, and it is located on the part of facing mutually with the shank 45a far-end 45b that covers 45, and described far-end 45b contacts with printed circuit board (PCB) 46, nestles up printed circuit board (PCB) 46.

The Assembly Instruction Device of electric component part B that now has said structure is as follows: utilize method such as riveted joint that moving contact 37 is contained on the lever 36, then, an end 38a of torsion-coil spring 38 is inserted among the hole 36c of lever 36, torsion-coil spring 38 is contained on the lever 36, its free end 38b freedom.The inside of the lever 36 insertion box bodys 35 of described moving contact 37 and torsion-coil spring 38 will be housed from box body 35 open upper surfaces.At this moment, the rotation axis 36b of lever 36 is installed on the supporting part 35f of box body 35.In addition, moving contact 37 is to insert like this, and promptly the contact portion 37a of clip shape clamps plate-shaped second permanent joint 32 that is located at box body 35 inside.

Secondly, the spring that is arranged on crown cap 45 upper surface portion 45e inside as the free end 38b of torsion-coil spring 38 is placed jut 45d compression, thereby little by little will cover 45 when pushing in the described box body 35, leaning the front and back sidewall 35a of described box body 35 along with the inner surface of upper surface portion 45e, the upper surface of 35b, the inner surface of described lid 45 upper surface portion 45e is with regard to stop motion.In this state, be located at the front and back sidewall 35a of box body 35, the jut 35e on the 35b is pressed among the engaging hole 45g on the engaging plate 45f that is located at described lid 45, will cover 45 and remain on the described box body 35.

In the box body 35 of in the manner described above lever 36 being packed into, when the supporting part 35f that makes rotating shaft 36b be installed in box body 35 goes up, lever 36 enters under the effect of torsion-coil spring 38 in along clockwise direction thrust and makes contact portion 37a slide to the state of first permanent joint 31 from second permanent joint 32, thereby makes the contact portion 37a and first permanent joint 31 enter conducting state.

In addition, at this moment, be arranged to the length of the far-end 45b of leg, far-end 45b and conductive contact 34a～34c are on the same horizontal plane from the shank 45a of described lid 45.

Described electric component part can be assembled like this: when microphone is placed on the phone body or when the phone body takes off, lever 36 just the rotation axis 36b on the supporting part 35f that is bearing in box body 35 do clockwise/counter-clockwise direction rotates; The contact portion 37a of moving contact 37 just contacts with first or second fixed

contact

31,32 or breaks away from; And the public relatively contact joint 33 of slipper 37b that bends to circular arc around the pivot center of lever 36 slides, and contacts with this joint 33 continuously simultaneously.

Particularly, for described electric component part B, during downward load on removing the operation part 36a that acts on lever 36, the microphone situation of taking off for example from the phone body, lever 36 is retained in its upper position, because operation part 36a is subjected to the thrust of torsion-coil spring 38 and does the clockwise direction rotation, as shown in Figure 3, like this, the contact portion 37a of moving contact 37 contacts with first permanent joint 31, make their electricly go up conducting, contact the circuit that joint 33 enters conducting state by described moving contact 37 with public thereby form one first permanent joint 31.

After this, when the operation part 36a that acts on lever 36 when downward load went up, lever 36 overcame the thrust of torsion-coil spring 38, does the counter-clockwise direction revolution around rotation axis 36b; Because the contact portion 37a of moving contact 37 leaves first permanent joint 31, and contacts with second permanent joint 32, therefore, form one second permanent joint 32 and contact the circuit that joint 33 enters conducting state with public by described moving contact 37.Correspondingly, utilize the switching of these circuit, can test example such as microphone whether be placed on the phone body.

As described in the typical examples, because staff is very near described electric component part B, therefore, described electric component part B is in the environment that is easy to generate static, and this static is that the electrostatic induction effect by human body institute static electrification produces.

Therefore, for reliably with described electric component part B with static be discarded on the ground connection figure 42 of printed circuit board (PCB) 46, box body 35 upper surfaces of the electric component part B of the present invention that is made by synthetic resin cover with crown cap 45; Described box body 35 with static spread out of to described crown cap 45; The far-end 45b of shank 45a that is located at a side of lid 45 as shown in Figure 3 contacts with ground connection figure 42 on being arranged on printed circuit board (PCB) 46, nestles up the ground connection figure, therefore, described electric component part B with static can emit reliably.

When the electric component part B of the present invention that will have this structure is contained on the printed circuit board (PCB) of phone body (not shown) inside, as shown in Figure 3, on the solder district 41a～41c of the circuitous pattern 41 of described printed circuit board (PCB) 46, coating paste solder, be used for and do the outside conductive contact 34a～34c soldering that connects usefulness, conductive contact 34a～34c extend out to the left side and the right of the box body 35 of described electric component part B, and external conductive joint 34a～34c is placed on the paste solder.Simultaneously, the far-end 45b that is located at the shank 45a on described lid 45 1 sides is contained in and leans against on the ground connection figure 42 of described printed circuit board (PCB) 46 in the mode of contact.After this, the described printed circuit board (PCB) 46 of described electric component part B is installed, utilize conveyer belt to pass through the inside of reflow ovens (not shown), it is carried out infrared radiation, thereby make described paste solder fusing, described electric component part B and printed circuit board (PCB) 46, on electric and mechanically, the eutectic welding bed of material 43 that produces by the paste solder caking by fusing connects each other securely.

In the embodiment of the invention that constitutes like this, on the box body 35 of described electric component part B with static simply on the ground connection figure 42 by described printed circuit board (PCB) 46 that the far-end 45b of the crown cap 45 of described electric component part B is being reclined, soldering not needing to resemble in example commonly used promptly is discarded on the ground connection figure 42 of described printed circuit board (PCB) 46 from described lid 45 reliably.

Because this reason, lid 45 of the present invention do not need with printed circuit board (PCB) 46 solderings together, do not need to make metal material, stand such as zinc-plated processing as the surface of steel plate; Therefore in addition, do not need to have the expensive material of high weldability, can utilize the metal material with low cost of not considering weldability, as steel plate, with on the described electric component part B with static emit reliably.

In addition, according to lid 45 of the present invention, as mentioned above, owing to do not need together with ground connection figure 42 solderings of shank 45a and printed circuit board (PCB) 46, the yield limit of the material of lid 45 improves, because as example commonly used was described, the sweep 39c that is used for soldering shank 39a had not needed.

The 3rd embodiment of the present invention is described now, when in electric component part B, using insulating material, and when insulating material has static, if conductor is very near insulating material, then static have aforesaid, to the character of immediate conductive discharge, even this is because electrified body and immediate conductor are non-conductive each other, when the static of electrified body surpasses the amount that is predetermined, the atmospheric discharge phenomenon can occur and cause; The 3rd embodiment of the present invention utilized this character; Fig. 4 represents to cover 45 the far-end 45b and the ground connection figure 42 approximating states of printed circuit board (PCB) 46.Fig. 7 is the part enlarged drawing that is used to illustrate this state; Do shortlyer from covering 45 shank 45a to the size of far-end 45b than the size among described second embodiment, it is to be installed in like this on the described printed circuit board (PCB) 46, promptly the size of Suo Duaning makes the ground connection figure 42 that is placed on the described printed circuit board (PCB) 46 not nestle against each other with described far-end 45b, but has a distance to be the gap of x between described ground connection figure 42 and far-end 45b.

Among the electric component part B be installed in described printed circuit board (PCB) 46 with aforesaid way on, do than the distance y a of the end face of the solder district 41a of current pattern 41 and 41b apart from x from the end face of described far-end 45b to described printed circuit board (PCB) 46, yb is littler, described like this electric component part B institute static electrification can be reliably be discharged to ground connection figure 42 from the far-end 45b of described lid 45, and can not make described electric component part B with static to circuitous pattern 41 discharges of described printed circuit board (PCB) 46.

In addition, because size ya, yb can make and approach x but the size more slightly bigger than x, therefore the size of electric component part B is reduced because between the joint and the spacing between the circuitous pattern of printed circuit board (PCB) can do narrowlyer.

In addition, on the contrary, ground connection figure 42 from the far-end 45b of the shank 45a of described lid 45 to printed circuit board (PCB) 46 can be for than described ya apart from x, the distance of yb is a little littler, if distance y a, the distance of yb is big talk, and the material yield limit of lid 45 can further be improved, and can do shortly because cover 45 shank 45a.

As mentioned above, adopt structure of the present invention, because the far-end 45b of the shank 45a of described lid 45 does not need soldering, the shank 45a of lid 45 can do shortlyer than example commonly used.Simultaneously, even only be located at a side of lid owing to the shank 45a that covers 45, as shown in Figure 6, electric component part B with static also can emit reliably, therefore it is littler in example commonly used to be used in the amount ratio that covers the metal material on 45, thereby can improve the material yield limit of described lid 45 greatly.

Moreover, described lid 45, in the face of the shape of the far-end 45b of ground connection figure 42 makes the sharpening shape, as Fig. 6, shown in 7, therefore, on the box body 35 with static can be reliably from the far-end of fining away ground connection figure discharge to described printed circuit board (PCB).

As above-mentioned, in the electric component with joint according to the present invention, the sidewall of the box body of being made by synthetic resin has breach, and this breach makes and is positioned at the box bottom edge part bottom side office, that be used for outside jointing surface and exposes; Therefore, the length that can be placed on the joint side surface in the solder district, box side wall outside can increase, correspondingly, the solder of fusing is at the part place of leaving sidewall a little, be bonded on the side surface of joint, simultaneously, the solder of fusing more may spread out at the upper surface of joint, thereby increases the contact area with solder greatly; As a result, can obtain the advantage of a brilliance, the promptly outside soldering strength that connects with joint and printed circuit board (PCB) can improve, and can not hinder reducing of electric component portion size.

Moreover, the mounting structure of electric component according to the present invention, nestle up or near the ground connection figure of printed circuit board (PCB) by the shank far-end that electric component is partly covered, on the described electric component part with static can emit reliably, like this, the shank far-end of described lid and the ground connection figure of described printed circuit board (PCB) do not need soldering.In other words, for as the material of described lid, do not need to make the surface of metal material to accept processing such as a zinc-plated class, perhaps do not need to use the expensive material with high weldability, like this, the cost of described lid can reduce.

In addition, according to the mounting structure that is used for electric component of the present invention, be used to emit the shank far-end of the lid of institute's static electrification on the electric component and the ground connection figure of described printed circuit board (PCB) and do not need soldering each other; Like this, the far-end of shank can be done shortlyer than common ground joint, because no longer need to make the outwardly-bent right angle of common ground joint far-end to obtain a soldering part, thereby the yield limit of cover material is improved, and the cost of lid can reduce.

Moreover according to the mounting structure that is used for electric component of the present invention, because the shank far-end of lid and the ground connection figure of printed circuit board (PCB) are not solderings, the amount of used solder can reduce, and the management of soldering has not needed.

In addition, according to the mounting structure that is used for electric component of the present invention, be set at x＜y from the shank far-end of lid to closely (x) of the ground connection figure of printed circuit board (PCB) with from shank far-end to the relation between the distance (y) of the circuitous pattern of printed circuit board (PCB) of described lid, thereby, on the electric component with static can be reliably to the ground connection figure discharge of printed circuit board (PCB).

Moreover, according to the mounting structure that is used for electric component of the present invention, by the shank far-end of electric component lid is fined away, on the electric component with static concentrate on the far-end of sharpening, and from the ground connection figure discharge of this point to printed circuit board (PCB).

Claims

1. electric component that has joint, it comprises: made by synthetic resin, form the box body of a shell; Be used for outside the connection, lead to the bottom edge part of box body from box body, along the joint of the sidewall setting of box body; Solder district soldering on described joint and the printed circuit board (PCB) is characterized in that together, is provided with breach on the described sidewall of described box body, and this breach exposes the bottom side surface that is positioned at the described joint that described bottom edge partly locates.

2. be used for a kind of mounting structure of electric component, it comprises: made by synthetic resin, form the box body of shell; Be located on the box body, be used for the outside conductive contact that connects; Be located at the crown cap that has shank on the described box body; It is characterized in that the circuitous pattern soldering of described conductive contact and printed circuit board (PCB) is in the same place, and the far-end of the shank of described lid leans against on the ground connection figure of described printed circuit board (PCB).

3. be used for a kind of mounting structure of electric component, it comprises: made by synthetic resin, form the box body of a shell; Be located on the box body, be used for the outside conductive contact that connects; Be located at the crown cap that has shank on the described box body; It is characterized in that, the circuitous pattern soldering of described conductive contact and printed circuit board (PCB) together, and the far-end of the shank of described lid is to be provided with like this, makes the distance (x) from the far-end of described shank to the ground connection figure of described printed circuit board (PCB) and is set at x＜y from far-end to the relation between the distance (y) of the circuitous pattern of described printed circuit board (PCB) of the shank of described lid.

4. be used for a kind of mounting structure of electric component according to claim 2 or 3, it is characterized in that the far-end of described shank is sharpened.