CN1983493A

CN1983493A - Safety double-brake switch structure

Info

Publication number: CN1983493A
Application number: CN 200510131925
Authority: CN
Inventors: 游聪谋
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-15
Filing date: 2005-12-15
Publication date: 2007-06-20
Anticipated expiration: 2025-12-15
Also published as: CN1983493B

Abstract

The invention is concerned with safety switch in double brakes, having two groups loop switched device. Each of them has two conductive pieces, alloy sheet metal and switched groupware, and press the switched groupware to turnoff or conduct the circuit loop. There is an interlocking piece of the alloy sheet metal to the two loop switched device and the interlocking piece connects two alloy sheet metal to form interlocking relation. When one circuit current is over loading, the alloy sheet metal of the other corresponding group will distort and jump to other direction to cut off the circuit. While the interlocking piece controls the alloy sheet metal of the other group to jump and cut off the circuit.

Description

Safety double-brake switch structure

Technical field

Construction of switch of the present invention, the construction of switch that provides the double loop Circuits System to use is provided especially, it is characterized in that, two groups of loop switching device shifters are set corresponding to two groups of circuit loops, between two groups of loop switching device shifters a moving part is set, making two groups of loop switching device shifters is synchronous action relationships, when current overload, crooked and the oppositely escape outage (OFF) of the alloying metal sheet temperature distortion of one group of loop switching device shifter, the reverse escape outage of alloying metal sheet (OFF) that can another group loop switching device shifter of synchronous interlock.

Background technology

Main energising (ON) and outage (OFF) the two kinds of course of action of being of its operation of the construction of switch of power supply, for effectively carrying out the interlock action of switch intraware, and prevent to cause the electricity consumption danger that circuit is overheated, electric wire cocks off breaking out of fire because of the circuital current overload, had the switch that possesses the current overload jump construction of all kinds on the market.

The employed Circuits System of European Region is the double loop Circuits System, and the switch of double loop Circuits System has two circuit loops, and when energising was used, each circuit loop provided the electric current in loop separately.Work as current overload, when making one of them circuit loop escape outage, another circuit loop still keeps loop current, the state of the single circuit loop escape outage of this kind, and its shortcoming is:

(a) do not make switch recover the normal power supply state if get rid of the current overload factor in real time, will cause the electricity shortage of the electrical appliance in the use, can't normal operation.

(b) owing to can't the current overload situation take place, will cause the user to continue the electricity consumption of pegging graft, increase the danger of electricity consumption with feeling to know.

When (c) overhauling Tripping Circuit, cut off another alive circuit loop, will the unsafe condition of electric shock take place if carelessness is forgotten.

Be with, this case inventor studies thinking, a kind of safety double-brake switch structure of improvement invention, make the synchronous escape outage when current overload of double-gate switch, avoid electrical appliance to be used in the state of partial circuit loop escape, cause running undesired, reach effective running of Electrical Safety requirement and electrical appliance.

Summary of the invention

The invention reside in and solve when a circuit loop escape cuts off the power supply in the Circuits System of double loop, another circuit loop still keeps loop current, cause the electricity shortage of the electrical appliance in the use, can't normal operation, the user continues the electricity consumption of pegging graft, increase the danger of electricity consumption, do not cut off another alive circuit loop during the maintenance Tripping Circuit, danger that increase is got an electric shock or the like problem.

The present invention is a kind of safety double-brake switch structure, wherein, have two groups of loop switching device shifters in the body group of switch, each group loop switching device shifter includes two conducting strips, an alloying metal sheet, switches assembly, the connection group has a moving part between the alloying metal sheet of two groups of loop switching device shifters, and this moving part makes two alloying metal sheets form synchronous continuous action relation; Under normal condition, two groups of loop switching device shifter synchronization actions become energising or outage (ON/OFF), when one of them circuit loop current overload of double loop Circuits System, crooked and the reverse escape of the alloying metal sheet temperature distortion of one group of corresponding loop switching device shifter, this circuit loop outage (OFF), another organizes the reverse escape of alloying metal sheet of loop switching device shifter to come interlock by this moving part, makes the also outage (OFF) synchronously of another circuit loop.

Main purpose of the present invention, be to provide a kind of safety double-brake switch structure, the connection group has a moving part between two groups of loop switching device shifters, and this moving part clamping links two alloying metal sheets of two groups of loop switching device shifters, makes two alloying metal sheets form synchronous continuous action relation; One of them circuit loop current overload when the double loop Circuits System, crooked and the oppositely escape outage (OFF) of the alloying metal sheet temperature distortion that makes one group of loop switching device shifter, this moving part makes the reverse escape outage of alloying metal sheet (OFF) of another group loop switching device shifter, the double loop circuit is cut off the power supply synchronously, guarantee Electrical Safety.

Another object of the present invention, be to provide a kind of safety double-brake switch structure, it is provided with the alloying metal sheet that an elastic parts is articulated in one group or two groups loop switching device shifter, utilize this elastic parts to guarantee the positioning states of alloying metal sheet, and make two synchronous interlocks of alloying metal sheet by moving part, under normal condition, make two alloying metal sheets arrive the position of energising or outage (ON/OFF) really, behind the current overload escape, make two alloying metal sheets remain in the position of outage (OFF) really, can avoid producing the uncertain or improper action of beating of contact because of these two alloying metal sheet elastic fatigues after long-time the use.

Extension purpose of the present invention, be to provide a kind of safety double-brake switch structure, it is provided with one and adjusts assembly, this adjustment assembly is connected in elastic parts, utilizes the adjustment function of this adjustment assembly, adjusts suitable elasticity tension of this elastic parts to one or angle, when current overload, should can form outage (OFF) by the rapid escape of temperature distortion with the alloying metal sheet that elastic parts articulates, and another alloying metal sheet escape outage of interlock synchronously, guarantee the whole service quality of switch product and safe in utilization.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the embodiment of the invention;

Fig. 2 is the assembled sectional view () of the embodiment of the invention, and it shows the operate condition of the down circuitry (OFF) of the embodiment of the invention;

Fig. 3 is the assembled sectional view (two) of the embodiment of the invention, and it shows the operate condition of the power on circuitry (ON) of the embodiment of the invention;

Fig. 4 is the assembled sectional view (three) of the embodiment of the invention, and it shows the embodiment of the invention when current overload, and alloying metal sheet escape is to the operate condition of circuit breaker (OFF);

Fig. 5 is an embodiment of the invention partial schematic diagram, and it shows the structure cross-sectional schematic of moving part;

Fig. 6 (a) is the partial sectional view of Fig. 3, and it is presented under energising (ON) state, the correlation of connector, alloying metal sheet, changeover module;

Fig. 6 (b) is the partial sectional view of Fig. 2 or Fig. 4, and it is presented under energising (ON) state, the correlation of connector, alloying metal sheet, changeover module.

Among the figure

1 body 10 is adjusted the hole

101 adjust assembly 1011 annular recess

11 perforates, 111 branched shaft holes

2 buttons, 20 male members

21 fulcrums, 22 elastic components (compression spring)

3 loop switching device shifters, 31 first conducting strips

32 second conducting strips, 321 openings

322 grooves, 33 alloying metal sheets

331 first conductiving points, 332 lugs

34 changeover modules, 341 projections

342 second conductiving points, 4 loop switching device shifters

41 the 3rd conducting strips 42 the 4th conducting strip

43 alloying metal sheets 431 the 3rd conductiving point

44 changeover modules, 441 projections

442 the 4th conductiving points, 5 moving parts

51 cross tubes, 52 sheer poles

53 clip slots, 6 elastic partss

61 perforation Δ S bounce spaces

Embodiment

For disclosing purpose of the present invention, feature and effect in detail, by following preferable specific embodiment, conjunction with figs. is described below in detail the present invention:

To shown in Figure 3, be three-dimensional exploded view, assembled sectional view (), the assembled sectional view (two) of the embodiment of the invention as Fig. 1; The present invention is a kind of safety double-brake switch structure, and it includes a body (1), a button (2), two groups of loop switching device shifters (3), (4) and a moving part (5); Wherein:

This body (1) is a hollow housing, and body (1) top is provided with a perforate (11), and the relative inner wall of this perforate (11) below convexes with branched shaft hole (111) respectively, and assembling is provided with two groups of loop switching device shifters (3), (4) in the body (1); Body (1) ecto-entad is provided with at least one adjustment hole (10), be two adjustment holes (10) in the present embodiment, pass in this adjustment hole (10) an adjustment assembly (101) is set, the upper end of this adjustment assembly (101) protrudes in body (1) inside, and the upper end annular of adjusting assembly (101) is provided with an annular recess (1011).

This button (2), it is articulated in the perforate (11) of body (1), establish fulcrum (21) in the middle of button (2) two sides respectively, this axial trough (21) correspondence is embedded in the branched shaft hole (111) of body (1), button (2) can be pressed for about the center by fulcrum (21), at least one elastic component (22) is established in button (2) assembling, is two elastic components (22) in the present embodiment, and this elastic component (22) is the compression spring in the present embodiment; One end of this elastic component (22) connects the male member (20) that is combined in button (2) below, and this elastic component (22) can relative key (2) returns again flexiblely, and the other end of elastic component (22) is socketed on the projection (341) of changeover module (34).

These two groups of loop switching device shifters (3), (4) correspond to each other identical and electric isolated, two groups of loop switching device shifters (3), (4) embed respectively to be provided with and are assembled in the interior both sides of body (1), and each group loop switching device shifter includes two conducting strips respectively, an alloying metal sheet, switches assembly.

In the present embodiment, illustrate with one group of loop switching device shifter (3) wherein.This loop switching device shifter (3) includes two conducting strips, first conducting strip (31), second conducting strip (32), and an alloying metal sheet (33), switches assembly (34):

The bending of this first conducting strip (31) upper end generally forms one L shaped.

This second conducting strip (32) middle part is formed with a horizontal opening (321), and a groove (322) is established in the upper end.

This alloying metal sheet (33), it is an en plaque, alloying metal sheet (33) assembling is provided with and forms little curved arc shape, has the characteristic that the curved arc deflection is positioned plate one side, when being heated, be out of shape back-flexing and the curved arc of beating deflection another side, one end (right-hand member) secure bond is in the top of first conducting strip (31), alloying metal sheet (33) passes the transverse opening (321) of second conducting strip (32) and does not contact this second conducting strip (32), movable end (left end) upper fixed of alloying metal sheet (33) makes up first conductiving point (331), second conductiving point (342) of corresponding its top of this first conductiving point (331); The movable end of alloying metal sheet (33) extends a hook-shaped lug (332), lug (332) connects an elastic parts (6), this elastic parts (6), be roughly a reverse U shape flexure strip, the other end is dull and stereotyped, this flat board embeds in the annular recess (1011) of adjustment assembly (101) upper end that is assembled in body (1) versatilely, and the U-shaped end of elastic parts (6) is provided with a perforation (61), the lug (332) of active buckle alloying metal sheet (33) in this perforation (61).

This changeover module (34) is a plate, its end face is in conjunction with being provided with a projection (341), this projection (341) embeds and is assembled in elastic component (22) end, aforementioned button (2) below, projection (341) side is provided with groove (340), this groove (340) is corresponding to embed in the groove (322) that is assembled in second conducting strip (32) upper end, two ends that make changeover module (34) can be to swing up and down as fulcrum such as the seesaw with the groove (322) of second conducting strip (32), and an end (left end) of changeover module (34) fixed combination downwards has second conductiving point (342).

Another group loop switching device shifter (4) includes two conducting strips equally, is the 3rd conducting strip (41), the 4th conducting strip (42), and an alloying metal sheet (43), switches assembly (44); Movable end (left end) upper fixed of this alloying metal sheet (43) makes up the 3rd conductiving point (431), the 4th conductiving point (442) of corresponding its top of the 3rd conductiving point (431), this changeover module (44) end face is in conjunction with being provided with a projection (441), and an end (left end) of changeover module (44) fixed combination downwards has the 4th conductiving point (442); The assembling of loop switching device shifter (4) and operational function are same as aforesaid loop switching device shifter (3).

This moving part (5) is two groups of loop switching device shifters of fixed clamp (3), two alloying metal sheets (33) of (4), (43) respectively, make the relation of two alloying metal sheets (33), the synchronous interlock of (43) tool, and connect for insulation between two groups of loop switching device shifters (3), (4); Moving part (5) can be insulating material and makes.

Join shown in Figure 5, in the present embodiment, this moving part (5) comprises a cross tube (51), one sheer pole (52), on, sheer pole (51), (52) form a segment distance between, roughly become one I-shaped, the left and right sides of this sheer pole (52) is provided with clip slot (53), this clip slot (53) is two alloying metal sheets of fixed clamp (33) respectively, (43), other joins Fig. 6 (a), Fig. 6 (b), under general normal operating condition, because on the moving part (5), sheer pole (51), (52) form a segment distance between, make this changeover module (34) and second conductiving point (342) can free displacement between first conductiving point (331) of the cross tube (51) of moving part (5) and alloying metal sheet (33), changeover module (44) and the 4th conductiving point (442) can free displacements between first conductiving point (431) of the cross tube (51) of moving part (5) and alloying metal sheet (43).Moving part (5) or alloying metal sheet (33), (43) can not swing up and down and swing up and down along with two ends of changeover module (34), (44), that is, changeover module (34), (44) are to operate separately with alloying metal sheet (33), (43), can not produce continuous action relation.

Under the state that the circuit loop of the 3rd figure is switched on, between second conductiving point (342) of this changeover module (34) and the cross tube (51) of moving part (5) bounce space (Δ S) is arranged, shown in Fig. 6 (a), this bounce space (Δ S) is present between the cross tube (51) of the 4th conductiving point (442) of changeover module (44) and moving part (5) equally, when current overload, alloying metal sheet (33) or alloying metal sheet (43) are bent downwardly spring, drive moving part (5) to bottom offset, this bounce space (Δ S) provides the space of free displacement, make the cross tube (51) of moving part (5) not be subjected to the stopping of the 4th conductiving point (442) of second conductiving point (342) of changeover module (34) or changeover module (44), moving part (5) can be free to bottom offset, and reaching from Fig. 6 (a) escape is the state of Fig. 6 (b).

Enforcement of the present invention, under general state, be the example explanation with loop switching device shifter (3) as shown in Figure 2, when the user pushes the left end of this button (2), button (2) counter rotation, the elastic component (22) of button (2) below is lateral bending to the right, it is downward that the right side, bottom of elastic component (22) pushes the right-hand member of changeover module (34) downwards, the left end upward swings of changeover module (34), second conductiving point (342) is upwards separated with first conductiving point (331) on the alloying metal sheet (33), form circuit loop (OFF) state that cuts off the power supply.

The action of another group loop switching device shifter (4), identical with loop switching device shifter (3).

Again as shown in Figure 3, when the user pushes the right-hand member of this button (2), the rotation of button (2) clockwise direction, the elastic component (22) of button (2) below is lateral bending left, the left end of the bottom left side downward pushing changeover module (34) of elastic component (22) is downward, the right-hand member upward swings of changeover module (34), second conductiving point (342), first conductiving point (331) downward and on the alloying metal sheet (33) is contacted, and electric current is via first conducting strip (31), alloying metal sheet (33), first conductiving point (331), second conductiving point (342), changeover module (34) arrives second conducting strip (32) and forms circuit loop energising (ON) state.The action of another group loop switching device shifter (4) is identical.

Under energising (ON) state, as shown in Figure 3, when circuit loop current overload that loop switching device shifter (3) is connected, this alloying metal sheet (33) is because of temperature distortion back-flexing downwards, the free reverse escape downwards of alloying metal sheet (33), at this moment, first conductiving point (331) on the alloying metal sheet (33) separates with second conductiving point (342) of changeover module (34), form outage (OFF) state, as shown in Figure 4, simultaneously, because clip slot (53) the fixed clamp alloying metal sheet (33) of moving part (5) forms continuous action relation with the alloying metal sheet (43) of another group loop switching device shifter (4), make alloying metal sheet (33) downwards oppositely during escape, synchronous interlock alloying metal sheet (43) is reverse escape downwards, two groups of loop switching device shifters (3), (4) form the complete off-position of down circuitry (OFF) synchronously, promote the fail safe of whole electricity consumption.

In addition, cause alloying metal sheet (43) downwards oppositely during escape when loop switching device shifter (4) current overload, the also synchronous alloying metal sheet (33) of interlock loop switching device shifter (3) reverse escape downwards, two groups of loop switching device shifters (3), (4) form the complete off-position of down circuitry (OFF) synchronously.

In Fig. 4, be under the escape state in current overload, after the user gets rid of the factor of current overload, the left end of pressing button (2) again, make elastic component (22) lateral bending to the right, it is downward that the right side, bottom of elastic component (22) pushes the right-hand member of changeover module (34) downwards, the left end of changeover module (34) and second conductiving point (342) upward swings, the cross tube (51) of changeover module (34) left end ejection moving part (5) upwards, moving part (5) interlock is upwards beated to top offset and the left end and first conductiving point (331) that drive alloying metal sheet (33), keep first conductiving point (331) to separate with second conductiving point (342), recover general outage (OFF) state that uses, as shown in Figure 2, simultaneously, because the continuous action relation that clip slot (53) the fixed clamp alloying metal sheet (33) of moving part (5) and alloying metal sheet (43) form, make the synchronous interlock alloying metal sheet (43) of alloying metal sheet (33) upwards beat two groups of loop switching device shifters (3), (4) form the state that re-uses of down circuitry (OFF) synchronously.

At present embodiment, can organize installing separately and put an elastic parts (6), the winding of this elastic parts (6) and alloying metal sheet (33) is as previously mentioned; In usual user mode, this elastic parts (6) is replaced position up with alloying metal sheet (33) end, makes that the contact, the separation that open or close (ON/OFF) are certain; When the current overload escape, from Fig. 3 to Fig. 4, this alloying metal sheet (33) temperature distortion is bent downwardly, the end of the movable end pushing and pressing elastic partss (6) of alloying metal sheet (33), the inverted U-shaped flexure strip of elastic parts (6) is shunk, elastic parts (6) is outwards upheld again then, downward location is replaced by the end of elastic parts (6) again in the end of alloying metal sheet (33), guarantee that first conductiving point (331) on the alloying metal sheet (33) separates with second conductiving point (342) on the changeover module (34), form outage (OFF) state, simultaneously, the alloying metal sheet (43) of another group loop switching device shifter (4) is driven downward escape by moving part (5), forms outage (OFF) state synchronously.

In the structure that elastic parts (6) are set, when being the escape state when current overload, get rid of the factor of current overload in the user after, the left end of pressing button (2) again, elastic component (22) is lateral bending to the right, changeover module (34) right-hand member is downward, changeover module (34) left end and second conductiving point (342) upward swings, alloying metal sheet (33) is driven by moving part (5) and moves up, the end of alloying metal sheet (33) is the end of pushing and pressing elastic partss (6) earlier, the inverted U-shaped flexure strip of elastic parts (6) is shunk and then extension, the end of alloying metal sheet (33) is replaced upwards by elastic parts (6) end once more, be returned to outage (OFF) state position of general normal use, as shown in Figure 2, the alloying metal sheet (43) of second group of loop switching device shifter (4) is also driven outage (OFF) state position upward to general normal use.

Above-mentioned elastic parts (6) can be organized alloying metal sheet (43) winding of loop switching device shifter (4) equally with another, or assembling is provided with two elastic partss (6) simultaneously, and its action is ditto described with effect.

In the present embodiment, pass the adjustment assembly (101) that combination is set in the adjustment hole (10) of body (1), its shaft is provided with screw thread, by this screw thread adjustment assembly (101) can be moved up or down, annular recess (1011) drives the flat board end of elastic parts (6) along with moving up or down, when turn is adjusted assembly (101) up and down the time, can adjust the relative pivot joint angle of this elastic parts (6) and alloying metal sheet (33), (43), make this elastic parts (6) have suitable elasticity tension; When circuital current transshipped, alloying metal sheet (33), (43) can overcome the elasticity tension of elastic parts (6) effectively and be bent downwardly distortion smoothly, and escape is outage (OFF) state to lower position rapidly; The adjustment function of this adjustment assembly (101) can effectively reduce the fraction defective of switch product.

Below the present invention has been done a detailed description, above-described, only be preferred embodiment of the present invention, can not limit scope of the invention process.All equalizations of doing according to the present patent application scope change and modify etc., all should still belong in the patent covering scope of the present invention.

By above-mentioned, safety double-brake switch structure of the present invention, it has the requirement that reaches Electrical Safety, improves the good efficacy of using, and really has practical effect.

Claims

1. safety double-brake switch structure, it includes a body, a button, two groups of loop switching device shifters, a moving part; Wherein,

This body is a hollow housing, and body is provided with a perforate;

This button, its assembling is arranged in the perforate of body, and can about press, button below combination is provided with an elastic component;

These two groups of loop switching device shifters, it is identical and electric isolated to correspond to each other, and two groups of loop switching device shifters embed respectively to be provided with and are assembled in both sides in the body, and each group loop switching device shifter includes two conducting strips respectively, an alloying metal sheet, switches assembly; This alloying metal sheet, one end are fixed on first conducting strip, and the movable end of alloying metal sheet makes up first conductiving point, and this first conductiving point is corresponding to second conductiving point; This changeover module, activity are connected to second conducting strip, and the changeover module apical grafting is in the elastic component of button, and two ends of changeover module are to swing up and down as fulcrum such as the seesaw with this second conducting strip, and an end of changeover module makes up second conductiving point;

This moving part, connect two groups of loop switching device shifters, make the relation of two synchronous interlocks of alloying metal sheet tool, make two groups of loop switching device shifters form energising (ON) state or (OFF) state of formation outage simultaneously simultaneously, and, moving part is provided with bounce space Δ S, and this bounce space Δ S provides aforementioned alloying metal sheet temperature distortion bending and reverse space of freely bouncing;

When a circuit loop current overload, crooked and the oppositely escape outage (OFF) of the alloying metal sheet temperature distortion that makes one group of loop switching device shifter, by the reverse escape outage of alloying metal sheet (OFF) of another group loop switching device shifter of interlock synchronously of this interlock group, two groups of circuit loops are cut off the power supply fully.

2. safety double-brake switch structure as claimed in claim 1, wherein, this moving part comprises a cross tube, a sheer pole, form a segment distance between this upper and lower cross bar, the left and right sides of moving part is provided with clip slot, this clip slot is two alloying metal sheets of two groups of loop switching device shifters of fixed clamp respectively, and the changeover module of two groups of loop switching device shifters can free displacement between the conductiving point of the cross tube of moving part and alloying metal sheet;

This moving part and alloying metal sheet can not swing up and down and swing up and down along with two ends of changeover module, that is changeover module and alloying metal sheet are to operate separately, can not produce continuous action relation.

3. safety double-brake switch structure as claimed in claim 2 wherein is connected for insulation between this moving part and two alloying metal sheets.

4. safety double-brake switch structure as claimed in claim 1, wherein male member is established in this button below, by this male member winding elastic component.

5. as claim 1 or 4 described safety double-brake switch structures, wherein this elastic component is the compression spring.

6. safety double-brake switch structure as claimed in claim 1, wherein,

The relative inner wall of this body perforate below convexes with branched shaft hole respectively;

Be arranged with fulcrum in the middle of the two sides of this button respectively, the corresponding branched shaft hole that embeds body of this fulcrum, this button can fulcrum be that the center rotates about.

7. safety double-brake switch structure as claimed in claim 1, wherein,

The second conducting strip middle part of these two groups of loop switching device shifters is formed with a horizontal opening, and the upper end is provided with a groove;

This changeover module is a plate, and its side is provided with groove, the corresponding groove that embeds assembling second conducting strip upper end of this groove; Two ends of changeover module can be to swing up and down as fulcrum such as the seesaw with second conducting strip.

8. safety double-brake switch structure as claimed in claim 7, wherein the alloying metal sheet of these two groups of loop switching device shifters passes the transverse opening of second conducting strip and does not contact this second conducting strip.

9. safety double-brake switch structure as claimed in claim 1, wherein the movable end of this alloying metal sheet connects an elastic parts, and the other end of this elastic parts embeds and is assembled in the body inboard.

10. safety double-brake switch structure as claimed in claim 1, wherein,

This body lateral surface is provided with one and adjusts the hole, and this adjusts combination one adjustment assembly in the hole, and this end nipple of adjusting assembly is for body interior;

The movable end extension of this alloying metal sheet is provided with a lug, this lug connects an elastic parts, this elastic parts is roughly a reverse U shape flexure strip, the movable outside that is assembled in aforementioned adjustment assembly that embeds of the other end of elastic parts, the U-shaped end of elastic parts is provided with a perforation, is buckled in the lug of the alloying metal sheet movable end of loop switching device shifter with this perforating movable;

Adjust assembly when turn and move up and down,, make this elastic parts have suitable elasticity tension to adjust the relative pivot joint angle of this elastic parts and alloying metal sheet.

11. safety double-brake switch structure as claimed in claim 10, wherein the upper end annular of this adjustment assembly is provided with an annular recess, the corresponding end that embeds the assembling elastic parts of this annular recess.