CN1461025A - Power supply switch device - Google Patents

Abstract

The object of the present invention is to provide a switching device superior in operability such that even if its contacts are welded by an arc which occurs when the switch is turned on, they are easily removed from each other, thereby preventing bad connection. The switching device of the present invention comprises a sliding member 6 which supports a movable contact 10 in a switch supporting part 18 in a housing 14. The movable contact 10 has a fulcrum part 10b on one side and a movable contact part 10d on the other side 10e. A fixed terminal 2 is formed on the bottom of the housing 14 to abut with the moveable contact 10. When the sliding member 6 is depressed, the movable contact part 10d of the movable contact 10 is abutted with the fixed terminal 2, and the part on the 10e side turns around the fulcrum part 10b.

Description

Power switch device

Technical field

The present invention relates to a kind of switching device, particularly a kind of switching device that uses as the switch of electronic equipment.

Background technology

By Figure 12, Figure 13 the existing switching device that uses as mains switch is described.Existing switching device is mainly by constituting with the lower part: the housing 21 that is made of insulating material; Be arranged on the inner bottom surface of this housing 21 and set in the above has the fixed terminal 22 of the 22a of fixed contact portion; Adjacent with this fixed terminal 22 and be arranged at center terminal 23 on the bottom surface of housing 21; Movably support this center terminal 23 and at one end form in the portion can with the travelling contact 28 of fixed terminal 22 contacts, the travelling contact portion 29 that separates; On this travelling contact 28 and center terminal 23, be fixed and support the support plate 27 of travelling contact 28; Connect agley be supported between travelling contact 28 and the center terminal 23, by self flexure operation with travelling contact 28 leaf spring 30 of direction driving up and down; The guiding parts 31 that contacts with the projection 30a of this leaf spring 30.

And, by the operating portion 31a of pressing operation slide unit 31, can be by means of leaf spring 30 with the travelling contact portion 29 of travelling contact 28 to the direction of fixed terminal 22 or the direction displacement of leaving from fixed terminal 22.

This existing switching device is with the operating portion 31a of slide unit 31 during to arrow A direction pressing operation, and projection 30a pushes slide unit 31, and travelling contact 28 also descended downwards when leaf spring 30 descended downwards.

Thus, the travelling contact portion 29 of an end contacts with fixed contact 22a.Therefore, because fixed terminal 22 passes through travelling contact 28 conductings with center terminal 23, the switch loop becomes conducting state.

In addition, if remove the pressure that is applied on the operating portion 31a, then make guiding parts 31 be returned to A-stage shown in Figure 12 by the elastic force of recovering spring 32, travelling contact 28 also returns to the state at initial stage simultaneously, fixed part 22a just leaves in travelling contact portion 29, thereby the switch loop becomes off state.

But, the electric arc that foregoing existing switching device takes place during conducting because travelling contact portion 29 contacts with fixed contact 22a, can make travelling contact portion 29 and the 22a of fixed contact portion welding, will strengthen the spring pressure of recovering spring 32 in order to peel off this welding, therefore, exist the thrust of press operating part 31a to become problem big, that operability reduces.

Summary of the invention

The objective of the invention is to solve above problem,, also can easily peel off these weldings, prevent the switching device of the good operability of loose contact even when a kind of electric arc that takes place during because of the conducting of switch loop is provided the welding of mutual contact portion.

As being characterized as of the switching device of the present invention of the 1st solution that solves the problems of the technologies described above, have: the cap assembly that possesses the incorporating section of hollow form in inside, and but pressing operation is accommodated in the above-mentioned incorporating section and from the slide unit of above-mentioned cap assembly to the outstanding operating portion of foreign side, above-mentioned slide unit is being positioned at the switch support portion supporting travelling contact of above-mentioned incorporating section, this travelling contact forms fulcrum in a side, and form travelling contact portion at opposite side, the fixed terminal that can contact with above-mentioned travelling contact is set on the inner bottom surface of above-mentioned incorporating section, when the above-mentioned slide unit of pressing operation, above-mentioned travelling contact and said fixing termination contact are that fulcrum makes above-mentioned opposite side revolution with above-mentioned fulcrum.

In addition, as being characterized as of the 2nd solution that solves the problems of the technologies described above, above-mentioned slide unit forms the 1st support that can support the above-mentioned fulcrum of above-mentioned travelling contact and can support the above-mentioned opposite side that has formed above-mentioned travelling contact portion in above-mentioned switch support portion the 2nd support, when above-mentioned slide unit was carried out above-mentioned pressing operation, the above-mentioned opposite side that is supported on above-mentioned the 2nd support of above-mentioned travelling contact left above-mentioned the 2nd support.

In addition, as being characterized as of the 3rd solution that solves the problems of the technologies described above, the said fixing terminal has the fixed contact portion that can contact with the above-mentioned travelling contact portion of above-mentioned travelling contact, the contact-making surface that on contact-making surface that is provided with on the surface of the above-mentioned travelling contact portion of above-mentioned travelling contact and/or surface, is provided with in the said fixing contact portion of said fixing terminal heave form circular-arc.

In addition, as being characterized as of the 4th solution that solves the problems of the technologies described above, the above-mentioned travelling contact portion of above-mentioned travelling contact is applied in the elastic force to the fixed terminal side direction at ordinary times, when the above-mentioned slide unit of pressing operation, the above-mentioned fulcrum that distance is formed on the above-mentioned travelling contact contacts with said fixing contact portion at first than the above-mentioned contact-making surface of the above-mentioned travelling contact portion in distally, by the above-mentioned revolution of above-mentioned travelling contact, the contact position of the above-mentioned contact-making surface that is in contact with one another is to the nearer side shifting of the above-mentioned fulcrum of distance then.

Description of drawings

Fig. 1 is the stereogram of the switching device of one embodiment of the invention.

Fig. 2 is the exploded perspective view of switching device of the present invention.

Fig. 3 is the vertical view of slide unit of the present invention.

Fig. 4 is the front view of slide unit of the present invention.

Fig. 5 is the upward view of Fig. 4.

Fig. 6 is the profile along the 6-6 line of Fig. 5.

Fig. 7 is the right side view of Fig. 4.

Fig. 8 is the profile that switching device of the present invention is wanted portion.

Fig. 9 is the view of travelling contact of the present invention.

Figure 10 is the schematic diagram of the action of explanation contact of the present invention portion.

Figure 11 is the schematic diagram of the action of explanation contact of the present invention portion.

Figure 12 is the profile of wanting portion of the existing switching device of explanation.

Figure 13 is the profile of wanting portion of the existing switching device of explanation.

Embodiment

Below, Fig. 1 to Fig. 6 shows one embodiment of the invention.Fig. 1 is the stereogram of the switching device of one embodiment of the invention, Fig. 2 is its exploded perspective view, Fig. 3 is the vertical view of slide unit of the present invention, Fig. 4 is the front view of slide unit of the present invention, and Fig. 5 is the upward view of Fig. 4, and Fig. 6 is the profile along the 6-6 line of Fig. 5, Fig. 7 is the right side view of Fig. 4, Fig. 8 is the profile that switching device of the present invention is wanted portion, and Fig. 9 is the view of travelling contact of the present invention, and Figure 10, Figure 11 are the schematic diagram of the action of explanation contact of the present invention portion.

Switching device of the present invention is provided with diapire 1 at foot as shown in Figure 2, and this diapire 1 is made of insulating material such as resin materials, and profile is roughly rectangle, and the below of aftermentioned cap assembly 12 is covered, and constitutes the inner bottom surface of incorporating section 14.

In the substantial middle portion of above-mentioned diapire 1, uprightly be provided with the partition wall 1a that the incorporating section 14 of aftermentioned cap assembly 12 inside is divided into 2 with predetermined height.In addition, on each end of the fore-and-aft direction of partition wall 1a, form the guide part 1b that the groove by コ word shape constitutes opposed to each other, aftermentioned slide unit 6 is led slidably by this guide part 1b.

In addition, near the diagram central portion of the partition wall 1a left side, uprightly be provided with the height lower and forming the oval-shaped bar-shaped 1c of spring-loaded portion than partition wall 1a.In addition, on the central portion of partition wall 1a, form the gap slot 1d of preliminary dimension.

In addition, the 1st, the 2nd fixed terminal 2,3 that on diapire 1 metallic plate is bent to form becomes one to be pressed into and to form integral body over the ground respectively.

Above-mentioned the 1st, the 2nd stiff end 2,3 has the 2a of contact portion, the 3a that exposes above the diapire 1 of the formation inner bottom surface of aftermentioned incorporating section 14, and from this contact 2a, 3a to a side crooked and portion of terminal 2b, 3b that extend to the diagram lower side of L word shape ground roughly, this portion of terminal 2b, 3b are pressed into to be formed at and are pressed into hole 1f on the diapire 1, and the leading section of portion of terminal 2b, 3b is outstanding from the inside-out portion of diapire 1.

In addition, on the 2a of contact portion of the 1st fixed terminal 2,, be fixed with the 2c of fixed contact portion of miscellaneous part formation respectively by riveted joint or be pressed into etc. in order to ensure the conducting of the 1st travelling contact 10 that constitutes by conductor plate with aftermentioned.

In addition, on the bar-shaped 1c of spring-loaded portion of diapire 1, leaf spring 4 and the 1st helical spring 5 can be installed.Above-mentioned leaf spring 4 as shown in Figure 2, constitute by the base portion 4b of the support holes 4a that on central portion, has formed the elliptical shape that can connect the 1c of spring-loaded portion and a pair of arm 4c that the both ends of this base portion 4b are crooked upward opposed to each other, on the front end of this arm 4c, form opposed and circular-arc to the inside outstanding sliding part 4d mutually.

And the size of space of mutual opposed arm 4c forms, and the sliding part 4d side of comparing leading section with base portion 4b is a negative value.

When the support holes 4a of elliptical shape ran through on the elliptoid spring-loaded 1c of portion, above-mentioned leaf spring 4 can be located and be installed on the precalculated position above the diapire 1.

In addition, on the 1c of spring-loaded portion that the support holes 4a of the leaf spring above being installed on diapire 14 gives prominence to upward, the 1st spring 5 that is made of compression helical spring can be installed.

In addition, diapire 1 along illustrated above-below direction, is guided the slide unit 6 that is made of insulating material such as resin materials slidably on partition wall 1a on the groove shape guide part 1b on the both ends that are formed at partition wall 1a.

With reference to Fig. 3～Fig. 7 above-mentioned slide unit 6 is described, slide unit 6 is as shown in the front view of Fig. 4, forms the abutment wall 6a of predetermined thickness in substantial middle portion, and the bar-shaped operating portion 6b that projects upwards from the upper surface of this abutment wall 6a forms predetermined height.The hole 6c that is pressed into that the be pressed into aftermentioned that forms on this operating portion 6b drives rod 16 has the predetermined aperture and the degree of depth.

And, on abutment wall 6a, from shown in Figure 3 in a side above the above-below direction an end face 6d and below the other end 6e of a side, outstandingly respectively form tabular guide part 6f, on the guide part 1b of diapire 1, can guide this guide part 6f with being free to slide.

In addition, in the left side of abutment wall 6a shown in Figure 4, formation can be supported the 1st contact support 7 of aftermentioned the 1st movable point 10.The 1st contact support 7 forms from the top of abutment wall 6a and is the wall components 7a that the roof shape extends to illustrated left side, inner one-tenth hollow form.And the 1st contact support 7 is on each end face 6d, 6e of the abutment wall 6a that has formed guide part 6f, and formation can be supported a pair of the 1st, the 2nd support projection 7b of conduct the 1st support of the fulcrum 10b of aftermentioned the 1st travelling contact 10,7c.

As the 1st, the 2nd support projection 7b of the 1st support as shown in Figure 4, form the gap of preliminary dimension, this gap portion can support the fulcrum 10b of aftermentioned the 1st travelling contact 10.

And, the 1st contact support 7 with the lower side of the wall components 7a of support 6a opposite side, form hook-shaped retainer 7d as the 2nd support.This retainer 7d in the below of wall components 7a towards forming as the interior side-prominent of support 6a direction.

In addition, on the end face of the wall components 7a that constitutes the 1st contact support 7, formation has desired depth and is roughly spring-loaded hole 7e rectangle, that can support aftermentioned the 2nd helical spring 11.

And, as shown in Figure 4, form the 2nd contact support 8 that can support aftermentioned the 2nd travelling contact 11 on the right side of abutment wall 6a.

The roughly 8a of spring-loaded portion of L word shape is formed the 2nd contact support 8 at the top from abutment wall 6a on the diagram right side, forms the gathering sill 8b of preliminary dimension between this 8a of spring-loaded portion and abutment wall 6a.

In addition, on the top of gathering sill 8b, form with the gap slot 1d that on the partition wall 1 of diapire 1, forms and combine also slidably joint portion 8c.

In addition, in the lower side of the 8a of spring-loaded portion, form the bar-shaped contact support 8d of the 11a of coiling portion that can support the 2nd travelling contact 11 that constitutes by aftermentioned twist coil spring highlightedly.In addition, slide unit 6 about contact support 8d, forms outstanding different separately a pair of spring fixed part 8e, the 8f of size from the 8a of spring-loaded portion as shown in Figure 3.

Each spring fixed part 8e, 8f as shown in Figure 4, leading section forms hook-shaped, the arm 11b of the 2nd travelling contact 11 that can fixedly connected aftermentioned be made of the twist coil spring.

In addition, side below the guiding parts 6 shown in the upward view of Fig. 5, the spring-loaded hole 6g of formation preset aperture size in the substantial middle portion of abutment wall 6a.The degree of depth of this spring-loaded hole 6g as shown in Figure 6, form near the end face of wall components 7a of the 1st contact support 7 till.

In addition, as shown in Figure 5, be formed at spring-loaded hole 6g on the abutment wall 6a up and down near, form the leaf spring incorporating section 9 of the arm 4c that can take in leaf spring 4 with the predetermined degree of depth.

This leaf spring incorporating section 9 as shown in Figure 7, form opposed the 1st sliding surface 9a in lower side with predetermined amplitude size, form opposed the 2nd sliding surface 9b in upper side with the wide size of amplitude size than the 1st sliding surface 9a, the end difference 9c that connects the 1st sliding surface 9a and the 2nd sliding surface 9b forms skewed.

In addition, as shown in Figure 7, when taking in the arm 4c with the leaf spring shown in the double dot dash line 4 in leaf spring incorporating section 9, each sliding part 4d, 4d of leaf spring 4 are crimped on the 1st sliding surface 9a.Under this state, descend downwards if push slide unit 6, then the sliding part 4d of leaf spring 4 just costs end difference 9c, thus strain takes place in leaf spring 4.

At this moment, the operating physical force of pressing operation slide unit 6 changes, and by the variation of this operating physical force, the operator can feel to knock the sensation of (click).

In addition, on the 1st contact support 7 of slide unit 6, can the bearing flat plate shape and be roughly rectangular the 1st travelling contact 10.The 1st travelling contact 10 is made of electroconductive components such as metallic plates, as shown in Figure 2, has the roughly OBL base portion 10a of flat condition, forms a pair of from the both ends of the length direction of this base portion 10a to the outstanding tongue-shaped fulcrum 10b of a side.

And each fulcrum 10b, 10b can be bearing in the gap portion between the 1st, the 2nd support projection 7b, the 7c of slide unit 6.

In addition, the 1st travelling contact 10 forms the spring receiving portion 10c of circular desired depth on the substantial middle part of base portion 10a.In addition, on base portion 10a, near a pair of fulcrum 10b, to the tab-like conglobate travelling contact 10d of portion of diagram lower side.

In addition, the opposite side 10e of the base portion 10a opposite with a side that has formed fulcrum 10b can be supported on the retainer 7d of slide unit 6.

And the contact-making surface 10f on a docking point portion 10d surface of the outstanding formation of base portion 10 heaves and forms circular-arc.

In addition, the 2nd helical spring 11 that constitutes by compression helical spring shown in Figure 2, be positioned on the spring receiving portion 10c of the 1st travelling contact 10, the upper end of the 2nd helical spring 11 is supported among the spring-loaded hole 7e on the end face of the wall components 7a that is formed on slide unit 6, to the 1st movable point 10 elastic forces that apply to downside.

This 1st travelling contact 10 that is applied elastic force by the 2nd helical spring 11, its fulcrum 10b is supported between the 1st, the 2nd support projection 7b, the 7c as the 1st support, the opposite side 10e opposite with fulcrum 10b is supported on the hook-shaped retainer 7b as the 2nd support, thereby is installed on the slide unit 6.

Promptly, the 2nd helical spring 11 applies elastic force to the 1st fixed contact 1 side direction to the 10d of the travelling contact portion side of travelling contact 10 in the normal state, when pressing operation slide unit 6, the 10d of travelling contact portion of travelling contact 10 becomes and can contact with the 2c of fixed contact portion of fixed contact 2.

And, constitute the 1st switch portion by the 1st travelling contact 10 and a pair of the 1st fixed terminal 2 as mains switch, when descending when pressing operation slide unit 6, a pair of travelling contact 10d of portion, the 10d of the 1st travelling contact 10 contacts with each 2c of fixed contact portion, 2c of the 1st fixed terminal 2.

Thus, a pair of the 1st fixed terminal 2,2 is by 10 conductings of the 1st travelling contact, and the 1st switch portion becomes conducting state.

Promptly, 14 bottom surface is provided with the fixed terminal 2 that can contact with travelling contact 10 to switching device of the present invention in the incorporating section, when pressing operation slide unit 6, the 10d of travelling contact portion of travelling contact 10 just contacts with fixed terminal 2, and fulcrum 10b is made opposite side 10e revolution as fulcrum.

In addition, the 2nd travelling contact 12 that constitutes by the twist coil spring at the 2nd contact support 8 upper supports of slide unit 6.The 2nd travelling contact 12 has the 12a of coiling portion that the line spring multi-turn that will be made of piano wire etc. is reeled as shown in Figure 2, and forms from the 12a of this coiling portion and extend 2 arm 12b, 12b that constituted to foreign side's linearity according to predetermined open angle.

And, the 2nd travelling contact 12 on the contact support 8d that the 12a of coiling portion is bearing in the 2nd contact support 8 in, a side arm 12b is fixed on a side the spring fixed part 8e, the opposing party's arm 12b is fixed on the opposing party's the spring fixed part 8f.

And, constitute as the 2nd switch portion that detects switch by the 2nd travelling contact 12 and a pair of the 2nd fixed terminal 3, when pressing operation guiding parts 6 descended the 2nd travelling contact 12,2 arm 12b, 12b contacted with a pair of the 2nd fixed terminal 3.

Thus, a pair of the 2nd fixed terminal 3,3 is by 12 conductings of the 2nd travelling contact, and the 2nd switch becomes conducting state.

In addition, above diapire 1, be provided with the cap assembly 13 of the top that covers diapire 1.Centered on by periphery wall 13a around this cap assembly 13, top is covered by roof 13b simultaneously, forms the incorporating section 14 of the hollow form that can take in slide unit 6 grades in inside.

The below of this hollow bulb 14 is open, and diapire 1 can be embedded in the open portion of this below.

In addition, cap assembly 13 is formed for installing the slot part 13c of the circle of aftermentioned rubber components 15 on the 13b central portion of the top on top, in the periphery of this slot part 13c with the outstanding caulking part 13d that forms the wall shape of predetermined thickness of predetermined height.

In addition, in the inboard of circular-arc slot part 13c, form the through hole 13e of the operating portion 6b that can connect slide unit 6 with predetermined aperture.

In addition, in the slot part 13c of top 13b, as shown in Figure 2, be provided with the inner cheese rubber components 15 that forms hollow.This rubber components 15 is made of dome-type periphery wall 15a and the flange 15b that is formed at the predetermined thickness on the peripheral part of this periphery wall 15a bottom.

And, at the top of dome-type periphery wall 15a, connect to form can be pressed into that aftermentioned drives rod 16 be pressed into hole 15c.

Such rubber components 15 is positioned at flange 15b under the state of slot part 13c, is inserted into the inboard by caulking part 13d and rivets installation, and is integrated with cap assembly 13.

In addition, driving rod 16 is made of discoid operating portion 16a and the bar-shaped 19b of portion that is pressed into that is pressed among the 6c of hole that is pressed into hole 15c and slide unit 6 that can be pressed into rubber components 15.

The assembling of the switching device of the present invention of Gou Chenging so at first is pressed into the 1st, the 2nd fixed terminal 2,3 portion of terminal 3b, 4b separately on diapire 1.After this, on the 1c of spring-loaded portion of diapire 1, insert leaf spring 4 is installed, on the base portion 4b of leaf spring 4, insert simultaneously the 1st helical spring 5 is installed.

In addition, slide unit 6 connects on the support 7 the 1st and installs and support the 1st travelling contact 10, simultaneously, and the both ends of in the spring-loaded hole 7e of the spring receiving portion 10c of the 1st travelling contact 10 and slide unit 6, the 2nd helical spring 11 being installed.

So, then the 1st travelling contact 10 is a fulcrum with the fulcrum 10b between the 1st, the 2nd support projection 7c, 7d, and opposite side 10e is supported on the retainer 7d, thereby the 1st travelling contact 10 is installed on the stop component 6.

In addition, on the 2nd contact support 8 of slide unit 6, the 2nd travelling contact 12 that is made of the twist coil spring is installed.

Like this, the slide unit 6 of the 1st, the 2nd travelling contact 10,12 is installed, under the state among the guide part 1b that will be embedded in diapire 1 from the outstanding guide part 6f of both ends 6d, the 6e of abutment wall 6a, cover the cap assembly 13 that riveted joint is equipped with rubber components 15 from the top, by being pressed into diapire 1 in the open portion below cap assembly 13, diapire 1 is temporarily fixed on the guiding parts 13.

Like this, then the operating portion 6b of slide unit 6 is outstanding upward from the through hole 13e of guiding parts 13, is positioned at the dome-type outer wall 15a inside of rubber components 15.

After this, by will drive rod 16 the 16b of the portion that is pressed into be pressed into rubber components 15 be pressed into hole 15c and slide unit 6 be pressed into hole 6c, the top of the incorporating section 14 of guiding parts 13 inside is airtight.

Therefore, can prevent that sealing etc. invades from the last direction incorporating section 14 of cap assembly 13.

In addition, as shown in Figure 8, by seal 17 sealings that 1f gap separately in hole constitutes with bonding agents such as epoxy resin that are pressed into periphery wall 13a and the 1st, the 2nd fixed terminal 2,3 and the diapire of the peripheral part of diapire 1 and cap assembly 13, can the lower side of the incorporating section 14 of inside is airtight, anti-sealings etc. are invaded incorporating section 14 from diapire 2 sides.

So in the switching device of the present invention of assembling, inner incorporating section 14 is divided into 2 by the partition wall 1a of diapire 1 as shown in Figure 8, and the left side forms the 1st incorporating section 18 in the drawings, and the right side forms the 2nd incorporating section 19 in the drawings.

And, form the 1st switch portion that supports the 1st travelling contact 10 in the 1st incorporating section 18 as mains switch, form 2nd switch portion of supporting in the 2nd incorporating section 19 as the 2nd travelling contact 12 of sense switch.

So the operation of the switching device of the present invention that constitutes as shown in Figure 8, above slide unit 6 is positioned at, 1st, the 2nd switch portion is under the A-stage of turn-offing, the operator will drive rod 16 and push downwards, when slide unit 6 is descended, the sliding part 4d that is positioned at the leaf spring 4 on the 1st sliding surface 9a of slide unit 6 slides the skewed end difference 9c of leaf spring incorporating section 9, increase and put on the pressing force that drives on the rod 16, further slide unit 6 is pushed downwards, sliding part 4c is positioned on the 2nd sliding surface 9b.At this moment, the operating physical force of pressing operation slide unit 6 sharply diminishes, the operator of pressing operation slide unit 6 can feel " knocking " sense.

When feeling that this " knocking " felt, the 10d of travelling contact portion of the 1st travelling contact 10 contacts with the 2c of fixed contact portion, the 2c of the 1st fixed terminal 2, and a pair of the 1st fixed terminal 2,2 is by 10 conductings of the 1st travelling contact, and the 1st switch portion becomes conducting state.

Turn-on action to the 1st switch portion describes in detail, at first, during pressing operation slide unit 6, as shown in figure 10, the contact-making surface 10f that distance is formed at the 10d of travelling contact portion of the fulcrum 10b side far away on the 1st travelling contact 10 contacts with the 2c of fixed contact portion at first.

After this, as shown in figure 11, when further pushing slide unit 6 and making it to descend, travelling contact 10 is the fulcrum revolution with fulcrum 10b.

Because these travelling contact 10 revolutions, as shown in figure 11, the contact position of the contact-making surface that is in contact with one another moves to the nearer position of distance fulcrum 10b.

That is the contact position of the contact-making surface that, is in contact with one another moves to C point shown in Figure 11 from the B point shown in the chain-dotted line of Figure 10.

Because the contact position of above-mentioned contact-making surface moves to the C point from the B point, on the B point of contact at first, even taking place, electric arc makes fixed terminal 2 and travelling contact 10 weldings, owing to pass through the pressing operation of slide unit 6, contact position moves to the C point from the B point, can easily peel welding.

In addition, meanwhile, a pair of arm 12b, the 12b of the 2nd travelling contact 12 contacts with the 3a of contact portion, the 3a of the 2nd fixed terminal 3, and a pair of the 2nd fixed terminal 3,3 is by 12 conductings of the 2nd travelling contact, and the 2nd switch portion becomes conducting state.

Above-mentioned the 1st switch portion is when switch conduction, even electric arc takes place, owing to covered by partition wall 1a between the 18, the 2nd incorporating section 19, the 1st incorporating section, the electric arc of generation can not fly in the 2nd incorporating section 19.Therefore, it is bad etc. that contact can not take place the 2nd switch portion.

Drive pushing of rod 16 as removing under the 1st, the 2nd switch portion conducting state, slide unit 6 is just pushed to upward by the elastic force of the 1st helical spring 5, automatically reverts to A-stage shown in Figure 8, and the 1st, the 2nd switch portion is an off state.

In the embodiment of above-mentioned switching device of the present invention, heave for circular-arc situation is illustrated with the contact site 10f of the 10d of travelling contact portion of travelling contact 10, but the contact-making surface that also can be the 2c of fixed contact portion of the 1st fixed terminal 2 is heaved for circular-arc.

Perhaps, also can for both contact-making surface of 2c of fixed contact portion and the 10d of travelling contact portion heave form circular-arc.

That is, contact-making surface 10f that is provided with on the surface of the switching device of the present invention 10d of travelling contact portion that can make at travelling contact 10 and/or the contact-making surface that is provided with on the surface of the 2c of fixed contact portion of fixed terminal 2 are heaved for circular-arc.

The effect of invention

As discussed above, because switching device of the present invention is at the pressing operation slide unit The time, the travelling contact section of travelling contact contacts with fixed terminal, makes other with fulcrum as fulcrum The revolution of one side, so, by the revolution of this travelling contact, can mobile travelling contact and fixing The contact position of terminal, though since when contact the electric arc that takes place make travelling contact and fixed terminal Welding also can be with easily strip off of this welding.

In addition, because when pressing slide unit, being supported on the 2nd support of travelling contact Opposite side leaves the 2nd support, so, can strengthen the revolution amount of travelling contact, can with Travelling contact and the reliably strip off of fixed terminal of welding owing to the generation of electric arc.

In addition, because at the contact-making surface of the surface of travelling contact section setting and/or at fixed contact The contact-making surface that the surface of section arranges heave form circular-arc, by the travelling contact revolution, mutually The position of contact-making surface contact can move continuously, can make travelling contact and fixed terminal Contact stabilization.

In addition, when the pressing operation slide unit, distance is formed at the fulcrum on the travelling contact Contact-making surface than the travelling contact in distally contacts at first with fixed contact section, after this, owing to pass through The revolution of travelling contact, the contact position of the contact-making surface that is in contact with one another moves to apart from fulcrum Nearside can make contact more stable.

Claims (4)

1, a kind of switching device is characterized by, and has: possess the cap assembly of the incorporating section of hollow form in inside, but and pressing operation is accommodated in the described incorporating section, from the slide unit of described cap assembly to the outstanding operating portion of foreign side,

Described slide unit is being positioned at the switch support portion supporting travelling contact of described incorporating section, this travelling contact forms fulcrum and forms travelling contact portion at opposite side in a side, the fixed terminal that can contact with described travelling contact is set on the inner bottom surface of described incorporating section, when the described slide unit of pressing operation, described travelling contact contacts with described fixed terminal, is that fulcrum makes described opposite side revolution with described fulcrum.

2, according to the described switching device of claim 1, it is characterized by, described slide unit forms the 1st support that can support the described fulcrum of described travelling contact and can support the described opposite side that has formed described travelling contact portion in described switch support portion the 2nd support, when described slide unit was carried out described pressing operation, the described opposite side that is supported on described the 2nd support of described travelling contact left described the 2nd support.

3, according to the described switching device of claim 1, it is characterized by, described fixed terminal has the fixed contact portion that can contact with the described travelling contact portion of described travelling contact, the contact-making surface that on contact-making surface that is provided with on the surface of the described travelling contact portion of described travelling contact and/or surface, is provided with in the described fixed contact portion of described fixed terminal heave form circular-arc.

4, according to the described switching device of claim 3, it is characterized by, the described travelling contact portion of described travelling contact is applied in the elastic force to the fixed terminal side direction at ordinary times, when the described slide unit of pressing operation, the described fulcrum that distance is formed on the described travelling contact contacts with described fixed contact portion at first than the described contact-making surface of the described travelling contact portion in distally, by the described revolution of described travelling contact, the contact position of the described contact-making surface that is in contact with one another is to the nearer side shifting of the described fulcrum of distance then.

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