CN1538476A

CN1538476A - Switch device

Info

Publication number: CN1538476A
Application number: CNA2004100321437A
Authority: CN
Inventors: 森俊晴
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2003-04-04
Filing date: 2004-04-01
Publication date: 2004-10-20
Anticipated expiration: 2024-04-01
Also published as: TWI232478B; TW200428441A; JP4200037B2; CN1249754C; JP2004311161A

Abstract

The present invention provides a switching device with reduced number of parts, having an automatic restoration function suitable for reducing the size. The switching device comprises the following structural parts: an operation piece 2 mounted on a case 1, which can perform rocking movement; a slide member 6 capable of elevating movement while locking into the operation piece 2; a contact point mechanism of which a contact point is changed into the state of being turned on and turned off corresponding to the direction of the rocking operation of the operation piece 2; a coil spring 9 urging the slide member 6 in a restoring direction; a latch plate 8 latching the slide member 6 to a descending position; and an expanding member 11 made of a shape-memory alloy deforming into a shrunk state by the conduction of electricity. By pulling the latch plate 8 in the direction away from the slide member 6 by utilizing the contracting force of the slide member 6 while power is supplied, the state of latching movement of the slide member 6 is released, and the operation piece 2 is automatically reset into a state of being turned off.

Description

Switching device

Technical field

The present invention relates to be used for the switching device of the power circuit etc. of various electronic equipments, relate in particular to and utilize the outside signal that comes to make the contact state for example automatically restore to the switching device of dissengaged positions from on-state.

Background technology

Past, have an example (for example) of the switching device of this auto-reset function, possess: shell with hollow-core construction of peristome referring to patent documentation 1, the operating parts that can joltily be supported by shell, and in the enclosure contact mechanism and electromagnet unit are set.Contact mechanism is made of the movable contact and the fixed contact that shake the operation combination or separate with operating parts, by the operating parts that exposes from peristome is shaken operation, can switch to the 1st state or the 2nd state to the contact state of contact mechanism.The structure of electromagnet unit comprises: along with operating parts shakes and the armature that rotates to the 2nd state side, be wound with the iron core of coil, and be used for the armature absorption of rotating and remain on permanent magnet on the iron core etc. to the 2nd state side, connect an end of back-moving spring on armature, this spring is used for operating parts is applied the active force that shakes to the 1st state side.

Roughly such switching device that constitutes, when operating parts being shaken contact state that operation makes contact mechanism when first state switches to the 2nd state, with this operating parts mutually interlock and the armature that rotates be adsorbed onto by permanent magnet on the iron core that has magnetic, so operating parts becomes the lock-out state that remains on the 2nd state.And, under this lock-out state,, then produce resilience force between iron core and the armature if to being wrapped in the coil electricity on the iron core, remove adsorbed state.So armature and operating parts are subjected to recovering the active force of spring, rotate to force direction, thereupon, the contact state of contact mechanism automatically resets to the 1st state from the 2nd state.

[patent documentation 1]: Japanese patent laid-open 9-129089 communique (2-5 page or leaf, the 1st figure, the 4th figure).

But, above-mentioned existing switching device, automatically restore to the drive source of previous status as the contact state that makes contact mechanism, adopt the electromagnet unit, its necessity comprises: the iron core that is tied with coil, be tied with the spiral skeleton of coil, and be used for the armature absorption of rotating and remain to a lot of member of formation of permanent magnet on the iron core etc. to the 2nd state side.Owing to so many member of formation have been installed, the miniaturization of overslaugh switching device in the shell.

Summary of the invention

The present invention proposes in view of the actual conditions of this prior art, and its purpose is to provide and can subtracts the number of components, is fit to the switching device that has auto-reset function of miniaturization.

In order to achieve the above object, switching device of the present invention has: shell has peristome; Operating parts can joltily be supported by this shell, and exposes from above-mentioned peristome; Contact mechanism, corresponding to the direction of shaking of this operating parts, the contact state becomes the 1st state or the 2nd state; Elastic component applies active force to aforesaid operations spare, and it is shaken to above-mentioned the 1st state side; Locking mechanism overcomes the active force of this elastic component, makes aforesaid operations spare keep above-mentioned the 2nd state; And latch-release mechanism, make the action of this locking mechanism, make aforesaid operations spare automatically return to above-mentioned the 1st state side, above-mentioned latch-release mechanism has the telescoping member of marmem system, and this telescoping member is deformed into contraction state by the energising memory.

The switching device of Gou Chenging like this, as making the operating parts that remains on the 2nd state and be in the lock state automatically return to the drive source of the 1st state, use marmem, this material itself has the characteristic that memory is deformed into contraction state, so can simplify latch-release mechanism, realize the miniaturization of switching device.

And, in the above-described configuration, best above-mentioned locking mechanism have with aforesaid operations spare shake the operation mutually interlock and in above-mentioned shell the sliding component of lifting, and make this sliding component be fixed on conductivity latch members on the down position, utilize the convergent force of above-mentioned telescoping member when energising to remove the stationary state of above-mentioned sliding component and above-mentioned latch members.If adopt this structure, then can realize being used for latch-release mechanism that operating parts is remained on the locking mechanism of the 2nd state and is used to remove the lock-out state of this locking mechanism with simple structure, can realize Miniature switchgear device with low cost.

In the case, two positions leaving mutually that are preferably in above-mentioned shell are provided with a pair of power supply terminal, above-mentioned latch members is installed in rotation on above-mentioned power supply terminal of the side, and, above-mentioned telescoping member is erected between above-mentioned latch members and the opposing party's the above-mentioned power supply terminal, above-mentioned telescoping member is switched on by these power supply terminals and latch members.If adopt this structure, then can realize being used for to the telescoping member alive circuit with simple structure.

And, in the above-described configuration, best above-mentioned latch members has L word shape continuous bonding pad and base plate, make the two ends of above-mentioned elastic component and above-mentioned sliding component and above-mentioned base plate elasticity meet the place, like this, push above-mentioned bonding pad to combine direction, make aforesaid operations spare keep above-mentioned the 2nd state with above-mentioned sliding component.If adopt this spline structure, then can make the latch members secure fixation to sliding component, and can utilize an elastic component to carry out the homing action of sliding component and the block action of latch members, thus the number of components can be reduced, with the more low-cost Miniature switchgear device that has good stability realized.

Description of drawings

Fig. 1 is the sectional drawing of the resetting device that switching device had of the expression embodiment of the invention;

Fig. 2 is the stereogram of the expression contact mechanism that this switching device possessed;

Fig. 3 is the stereogram of expression with the internal mechanism partly cut-away of this switching device;

Fig. 4 is the stereogram of the expression latch plate that this switching device had;

Fig. 5 is the sectional drawing along the V-V line of Fig. 1;

Fig. 6 is the action specification figure of the blocking of this resetting device of expression;

Fig. 7 is the action specification figure of this contact mechanism on-state of expression.

Fig. 8 is the action specification figure of the lock release state of this resetting device of expression.

Embodiment

Following with reference to accompanying drawing, describe embodiments of the present invention in detail.

Fig. 1 is the sectional drawing of the resetting device that switching device had of the expression embodiment of the invention; Fig. 2 is the stereogram of the expression contact mechanism that this switching device possessed; Fig. 3 is the stereogram of expression with the internal mechanism partly cut-away of this switching device; Fig. 4 is the stereogram of the expression latch plate that this switching device had; Fig. 5 is the sectional drawing along the V-V line of Fig. 1; Fig. 6 is the action specification figure of the blocking of this resetting device of expression; Fig. 7 is the action specification figure of this contact mechanism on-state of expression.Fig. 8 is the action specification figure of the lock release state of this resetting device of expression.

In these figure, the plastic shell of mark 1 expression, this shell 1 form have peristome 1a in the above the under casing shape arranged, on its opposed two side the two side of paper orthogonal direction (among the Fig. 1 with), coaxial respectively shape ground is formed with axis hole 1b, 1b.As Fig. 3 and shown in Figure 5, the inside of shell 1 is divided into the 1st～the 3rd

retractable room

1d, 1e, 1f by 2 dividing

plate

1c, 1c, its details aftermentioned.In the 1st and the

3rd retractable room

1d, 1f, be provided with contact mechanism, be used for the dissengaged positions (the 1st state) and the on-state (the 2nd state) of diverter switch.In the 2nd retractable room 1e, be provided with resetting device, this resetting device comprises locking mechanism and latch-release mechanism, the former is used for keeping operating parts 2 (locking) in on-state; The latter has latch-release mechanism, removes the lock-out state of operating parts 2, returns to dissengaged positions.Axle supports

fulcrum

2b, 2b respectively in axis hole 1b, the 1b of shell 1, gives prominence on the outside wall surface that is arranged on operating parts 2 this fulcrum 2b, the coaxial shape of 2b, and like this, operating parts 2 is supported on shell 1, and can be that pivot shakes with fulcrum 2b, 2b.Operating parts 2 forms the cap-like that has operating surface 2a on top.This operating surface 2a has covered the peristome 1a of shell 1 basically.And, outstanding being provided with on the internal face of operating parts 2: be separately positioned on a pair of

driving projection

2c, 2c the 1st and the

3rd retractable room

1d, 1f in, and be arranged on the 2nd retractable room 1e interior in conjunction with projection 2d.

As shown in Figure 2, in the 1st and the 3rd retractable room 1d of shell 1, the bottom of 1f, to have the center terminal 3 of supporting projection 3a and fixed terminal 4 and be separated from each other configuration with fixed contact 4a, conductive electrode 5 is supported on the center terminal 3, can will shake as shaking fulcrum A with the contact point of supporting projection 3a.In an end of this conductive plate 5, additional be provided with can with fixed contact 4a contact or the movable contact 5a that separates; In the end of one end and opposition side, the flexure strip 5b of elastically deformable is bent and is processed into bending.And it is set for: when with the switching of contact mechanism operating parts 2 being shaken operation, driving projection 2c pushes flexure strip 5b downwards and rotates and drives conductive plate 5, is that the center is upward through at right and left to shake fulcrum A simultaneously.In this process, as stop shake fulcrum A place, the height and position of leading section that drives projection 2c is minimum, at this moment flexure strip 5b's becomes maximum around song.

As shown in Figure 3, on the opposed faces of dividing plate 1c, the 1c of shell 1, form guide part 1g, the 1g of direction extension up and down respectively, in the space (space of the inboard of Fig. 3) of the 2nd retractable room 1e that divides by this

guide part

1g, 1g, be provided with plastic sliding component 6.This sliding component 6 is directed to the 1g of portion, 1g and wall on every side (plate) face and limits its moving of direction all around, and guides it in the lifting moving of above-below direction freely.

As shown in Figure 1, this sliding component 6 has: form superincumbent semi-cylindrical protuberance 6a, the 6b of tube portion of boring, lower aperture is formed on the spring fixed part 6c on the 6b of this inner bottom surface, and be formed on the contacted side wall surface 6d of

guide part

1g, 1g on locking claw 6e.Below this sliding component 6 on the bottom of opposed the 1st retractable room 1e, be provided with power supply terminal 7 with fixed head 7a, on this fixed head 7a, be provided with the latch plate 8 that forms by the conductive metal plate.As shown in Figure 4, this latch plate 8 has: be installed in base plate 8a above the said fixing plate 7a with electric on-state, and become L word shape and continuous upward bonding pad 8b from the end bent of this base plate 8a.And, at the central portion of this bonding pad 8b, run through being provided with the rectangle reach through hole 8c that can combine or throw off with the locking claw 6e of sliding component 6, be bent to form hook portion 8d in the upper end of bonding pad 8b.And, the latch plate 8 that forms like this is installed to above the fixed head 7a, being that the state that rotates on fixed head 7a of fulcrum supports with this bending bight C (referring to Fig. 1), thus, can be at the direction top offset that contacts or separate with the side wall surface 6d of sliding component 6.Between the base plate 8a of the spring joint portion 6c of sliding component 6 and latch plate 8, be provided with helical spring 9 as elastic component, utilize the elastic force of this helical spring 9 to push sliding component 6 to top, thus, the protuberance 6a of sliding component 6 and the protruding 2d butt of combining of operating parts 2.And utilize the elastic force of helical spring 9, the base plate 8a of latch plate 8 pushed downwards, like this, the bonding pad 8b of latch plate 8 by to the contacted direction pushing of the side wall surface 6d of sliding component 6.Moreover, on the bottom of the 2nd retractable room 1e, on the position of leaving mutually with power supply terminal 7, be provided with power supply terminal 10, on the upper end of this power supply terminal 10, be formed with hook portion 10a.

As shown in figures 1 and 3, on the hook portion 10a of the hook portion 8d of latch plate 8 and power supply terminal 10, fixed the fixed part 11a that is bent to form at the both ends of telescoping member 11,11a, can be by a pair of power supply terminal 7,10 and latch plate 8, from the outside of shell 1 to telescoping member 11 energisings.This telescoping member 11 is processed into coil spring shape to shape memory allow wires, remembers the shape of contraction state in advance, so that shrink at length direction under the predetermined condition of high temperature.And above-mentioned marmem uses the material with certain resistance, so that it generates heat because of the energising resistance heat.This material for example wishes to use Nitinol etc.If have ejusdem generis material, then also can use other materials.

Telescoping member 11 becomes the condition of high temperature because of energising, and memory is deformed into contraction state, low-temperature condition during with non-energising is compared, produce enough big convergent force, so, by this convergent force, bonding pad 8b is by the direction traction towards the side wall surface 6d that leaves sliding component 6, and latch plate 8 becomes lock release state shown in Figure 8.And the convergent force of telescoping member 11 at this moment is set to the several times of elastic force that latch plate 8 applied the helical spring 9 of active force.Like this, telescoping member 11 can overcome the elastic force of helical spring 9 and spur latch plate 8 when energising.On the other hand, telescoping member 11 is stopped energising and drops to predetermined temperature when following, the convergent force of telescoping member 11 is more much smaller than the elastic force of helical spring 9, the elastic force of helical spring 9 surpasses the convergent force of telescoping member 11, so, latch plate 8 makes telescoping member 11 elongations on one side, Yi Bian turn back to block action state shown in Figure 1.

In the switching device that constitutes like this, as shown in Figure 2, under the operating surface 2a of operating parts 2 right-hand member is pressed into dissengaged positions in the shell 1, drive protruding 2c than shaking the position that fulcrum A takes back and the flexure strip 5b Elastic Contact of conductive plate 5, conductive plate 5 is subjected to elastic acting force, the direction of this active force and operating parts 2 to shake direction opposite, it is the direction of rotating to counter-clockwise direction, like this, conductive plate 5 state that its left ends keep and center terminal 3 connects, the dissengaged positions that movable contact 5a maintenance is left from fixed contact 5a.At this moment, as shown in Figure 1, the protruding 2d of the combination of operating parts 2 moves to the extreme higher position by the push operation of operating parts, is subjected to the sliding component 6 of helical spring 9 active force upward, then remains on to make this in conjunction with protruding 2d state upward.Under this state, by 11 energisings of 7,10 pairs of telescoping member of power supply terminal, telescoping member 11 convergent force under the normal temperature state does not diminish.Therefore, the elastic force that latch plate 8 is applied the helical spring 9 of power surpasses the convergent force of telescoping member 11, thus bonding pad 8b, with the contacted direction of side wall surface 6d of sliding component 6 on remain on the block action position under the stressed state.At this moment, the locking claw 6e of sliding component 6 remains on the state that breaks away from upward from bonding pad 8b.

Below explanation is operated under above-mentioned dissengaged positions, forwards the situation that operating surface 2a left end is pressed into the on-state in the shell 1 to.As shown in Figure 7, with the operation of shaking of this operating parts 2, the driving of operating parts 2 projection 2c is moving flexure strip 5 when the right side is pushed in the left side of conductive plate to.In this process, driving protruding 2c by after shaking fulcrum A, and then conductive plate 5 turns clockwise at once, and movable contact 5a contacts with fixed contact 4a becomes on-state.And as shown in Figure 6, along with the operation of shaking of operating parts 2, sliding component 6 is operated the protruding 2d of combination of part 2, and the elastic force that overcomes helical spring 9 pushes downwards.Then, sliding component 6 moves downwards along the internal face of bonding pad 8b, afterwards, locking claw 6e combines with reach through hole 8c is quick, sliding component 6 is keeping by the state of locking with the mutually close position of bonding pad 8b, its result, and operating parts 2 remains on the position of on-state.

Situation about returning automatically to dissengaged positions from on-state below is described, under blocking shown in Figure 6, when utilizing not shown external circuit making alive between power supply terminal 7,10, when making predetermined current flow into telescoping member 11, telescoping member 11 becomes the condition of high temperature because of resistance heat generates heat.Its result, telescoping member 11 begin to shrink, and utilize this convergent force to overcome the elastic force of helical spring 9, begin drawing bonding pad 8b.Along with this action, bonding pad 8b rotates to the direction of the side wall surface 6d that leaves sliding component 6 shown in the arrow D of Fig. 8, so can remove the blocking of reach through hole 8c and locking claw 6e.And, be disengaged locking and become the sliding component 6 that moves freely and be subjected to the elastic force of helical spring 9 to be pushed to the top, simultaneously, the protuberance 6a of this sliding component 6 upwards pushes away the protruding 2d of the combination of operating parts 2, operating parts 2 is rotated along illustrated clockwise direction, therefore, the driving of operating parts 2 projection 2c is moving flexure strip 5b when the right side of conductive plate 5 pushes to the left.In this process, make to drive protruding 2c by shaking after the fulcrum A, and then conductive plate 5 immediately inhour rotate, and movable contact 5a leaves fixed contact 4a, thus, can make the contact state automatically return to dissengaged positions shown in Figure 2 from on-state shown in Figure 7.And,, also stop from power supply terminal 7,10 energisings to telescoping member 11 along with switching to this dissengaged positions.Like this, telescoping member 11 the temperature remains within the normal range state, so, as shown in Figure 1, the bonding pad 8b of latch plate 8 utilizes the elastic force of helical spring 9 to automatically return to the block action position, when operating parts 2 being shaken once more when being operating as on-state, can make sliding component 8 reliable lockings.

And, also can under blocking shown in Figure 6, carry out the hand off operation to operating parts 2.In the case,, when shaking operation, utilize the driving projection 2c of operating parts 2, the contact state is switched to dissengaged positions shown in Figure 2 from on-state shown in Figure 7 by illustrated clockwise direction when the right-hand member of the operating surface 2a of operating parts 2 is pressed into.But sliding component 6 keeps being latched in state on the down position by latch plate 8, and the protruding 2d of the combination of operating parts 2 leaves the protuberance 6a of sliding component 6.

As mentioned above, the switching device that relates to present embodiment, as making the operating parts 2 that is in the lock state under the on-state (the 2nd state) automatically return to the drive source of dissengaged positions (the 1st state), used material this has the marmem telescoping member 11 of the characteristic of memory distortion under contraction state, so, do not need many component compositions are got up to constitute the unit, can constitute latch-release mechanism, can reduce the number of components, realize the miniaturization of switching device.

And, utilize with shaking of operating parts 2 and operate mutually interlock and the sliding component 6 of lifting in shell 1, and this sliding component 6 is fixed on conductivity latch plate 8 on the down position, constitute locking mechanism, convergent force when utilizing telescoping member 11 energisings is removed the bonding state of sliding component 6 and latch plate 8, so utilize simple structure, can realize being used for operating parts 2 is locked into the locking mechanism of on-state (the 2nd state), and the latch-release mechanism that is used to remove the lock-out state of this locking mechanism, can realize Miniature switchgear device with low cost.And, 2 positions leaving mutually at shell 1 are provided with a pair of power supply terminal 7,10, be installed in latch plate 8 on one side the power supply terminal 7 and it can be rotated, and the two ends of telescoping member 11 are stretched be arranged between latch plate 8 and another power supply terminal 10, come telescoping member 11 energising by this power supply terminal 7,10 and latch plate 8, so can realize circuit with simple structure to telescoping member 11 energising usefulness.

Moreover, on latch plate 8, be bent to form continuous base plate 8a in L font ground and bonding pad 8b, and helical spring 9 is arranged between sliding component 6 and the base plate 8a, reach through hole 8c to bonding pad 8b applies the active force that makes its direction that combines with the locking claw 6e of sliding component, operating parts 2 is remained under the 2nd state, so can make sliding component 6 and latch plate 8 fixing securely, and, can utilize a helical spring 9 to carry out the block action of the direction of rotation of the homing action of above-below direction of sliding component 6 and latch plate 8, also can reduce the number of components thus.

And, in the above-described embodiment, illustrated that the elastic force that utilizes helical spring 9 applies active force to latch plate 8 all the time, automatically return on the block action position in latch plate 8 under the normal temperature state, apply elastic force but also can omit 9 pairs of latch plate 8 of helical spring.In the case, for example, when operating parts 2 is operated on-state, directly push the base plate 8a of latch plate 8 with the bottom of sliding component 6, then, make bonding pad 8b turn back to the mutually close position of the right side wall of sliding component 6 on, thus, carry out the block action of sliding component 8.Perhaps utilize the projection that on operating parts 2, is provided with in addition to carry out the bulldozing operation of the base plate 8a of latch plate 8, latch plate 8 is resetted.

And, in above-mentioned execution mode example, illustrated that telescoping member 11 adopts the situation of the marmem that is processed into coil spring shape, but be not limited in this helical spring, for example also can utilize the marmem that is processed into other shapes such as ring-type.

Moreover, in above-mentioned execution mode example, utilizing elastic force with sliding component 6 pushings helical spring 9 upward, with latch plate 8a pushing downwards, but also can come sliding component 6 and latch plate 8 are applied active force with other elastic component respectively.

And, in above-mentioned execution mode example, show the switching device that only utilizes the on/off between 1 fixed contact and power supply terminal, but self-evident, the present invention is also applicable make 2 fixed contacts selectively with the switching device of the type of center terminal connection/cut-out.

The invention effect

The present invention implements in a manner described, can obtain following effect.

Will be under the 2nd state blocked operating parts, the convergent force of the telescoping member of the marmem system that is deformed into contraction state is remembered in utilization by energising, state unlocks, so, needn't get up to constitute the unit to many component compositions, can constitute latch-release mechanism, can reduce the number of components, realize being fit to the switching device of miniaturization.

Claims

1, a kind of switching device is characterized in that, has: shell has peristome; Operating parts can joltily be supported by this shell, and exposes from above-mentioned peristome; Contact mechanism, corresponding to the direction of shaking of this operating parts, the contact state becomes the 1st state or the 2nd state; Elastic component applies active force to aforesaid operations spare, and it is shaken to above-mentioned the 1st state side; Locking mechanism overcomes the active force of this elastic component, makes aforesaid operations spare keep above-mentioned the 2nd state; And latch-release mechanism, make this locking mechanism action, make aforesaid operations spare automatically return to above-mentioned the 1st state side,

Above-mentioned latch-release mechanism has the telescoping member of marmem system, and this telescoping member is deformed into contraction state by the energising memory.

2, switching device as claimed in claim 1, it is characterized in that: above-mentioned locking mechanism have with aforesaid operations spare shake the operation mutually interlock and in above-mentioned shell the sliding component of lifting, and make this sliding component be fixed on conductivity latch members on the down position, utilize the convergent force of above-mentioned telescoping member when energising to remove the stationary state of above-mentioned sliding component and above-mentioned latch members.

3, switching device as claimed in claim 2, it is characterized in that: two positions leaving mutually at above-mentioned shell are provided with a pair of power supply terminal, above-mentioned latch members is installed in rotation on above-mentioned power supply terminal of the side, and, above-mentioned telescoping member is erected between above-mentioned latch members and the opposing party's the above-mentioned power supply terminal, above-mentioned telescoping member is switched on by these power supply terminals and latch members.

4, as claim 2 or 3 described switching devices, it is characterized in that: above-mentioned latch members has L word shape continuous bonding pad and base plate, make two ends and the above-mentioned sliding component and the above-mentioned base plate Elastic Contact of above-mentioned elastic component, like this, push above-mentioned bonding pad to combine direction, make aforesaid operations spare keep above-mentioned the 2nd state with above-mentioned sliding component.