CN206259273U

CN206259273U - Load switch

Info

Publication number: CN206259273U
Application number: CN201621163676.3U
Authority: CN
Inventors: 付亮; 鲁君; 乔伟
Original assignee: ZHEJIANG ZHENGTAI MACHINE TOOL ELECTRICAL MANUFACTURING CO LTD; Zhejiang Chint Electrics Co Ltd
Current assignee: ZHEJIANG ZHENGTAI MACHINE TOOL ELECTRICAL MANUFACTURING CO LTD; Zhejiang Chint Electrics Co Ltd
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2017-06-16
Anticipated expiration: 2026-10-25

Abstract

A kind of load switch, including the contact system in housing and housing, the contact system is supported including contact, the contact is supported to be provided with the contact installation cavity for installing contact bridge, contact bridge is installed in the contact installation cavity that contact is supported by flexible member, and the extension cavity set with the insertion of contact installation cavity is provided with above the contact installation cavity；During installation, flexible member is first loaded in contact installation cavity, contact bridge is first vertical to be loaded in extension cavity, the downward compression elastic element of contact bridge is moved in contact installation cavity and overturn to horizontal, is offseted by the installation elastic force of flexible member and the upper side wall of contact installation cavity and is installed in contact installation cavity.The utility model load switch is optimized to the structure that contact is supported, is increased in the top of contact installation cavity and is extended cavity, and the extension cavity can cause that the thickness of whole part is substantially uniform, is reduced due to the injection defect that design is caused.

Description

Load switch

Technical field

The utility model is related to Low Voltage Electrical Apparatus, more particularly to a kind of load switch.

Background technology

Existing load switch in assembling process, spring load after, it is necessary to first with instrument by spring-compressed certain distance it After contact bridge could be loaded, cause contact bridge to assemble difficult；Because wall unevenness is even, cause injection performance not good, easy shape Into injection defects such as contractions.

Existing load switch sets boss and is used to pin load switch knob covering, and the boss used by padlock causes operation Personnel can not completely catch that the operation part of handle is split to put capable operation into, and great inconvenience is brought to operation.Pad lock structure is equal Design is being covered, and causes product in closure and the equal padlockable of open position, it is impossible to prevent client's false-lock.

The operating mechanism of existing load switch uses spring, ratchet, the structure of sliding block, and without energy-storage function, feel is not It is smooth.

Existing load switch, the pedestal of mounting means has two kinds, most of feature identical after mounting means and plate before plate In the case of but can not be general, it is necessary to open two molds, increased cost.Static contact assembly space is small, is unfavorable for assembling.

The content of the invention

The purpose of this utility model is the defect for overcoming prior art, there is provided a kind of simple and compact for structure, performance safety Stabilization, the load switch of low cost.

To achieve the above object, the utility model employs following technical scheme：

A kind of load switch, including the contact system in housing and housing, the contact system include that contact supports 5, institute Stating contact supports 5 to be provided with the contact installation cavity 501 for installing contact bridge, and contact bridge is installed on tactile by flexible member 51 Head supports in 5 contact installation cavity 501 that the top of the contact installation cavity 501 is provided with and the insertion of contact installation cavity 501 The extension cavity 502 of setting；During installation, flexible member 51 first loaded in contact installation cavity 501, first prolong contact bridge by vertical loading Stretch in cavity 502, the downward compression elastic element 51 of contact bridge is moved in contact installation cavity 501 and overturn to horizontal, is relied on The installation elastic force of flexible member 51 offsets with the upper side wall of contact installation cavity 501 and is installed in contact installation cavity 501.

Further, Breadth Maximum of the height for extending cavity 502 more than contact bridge.

Further, minimum widith of the width for extending cavity 502 less than contact bridge.

Further, the flexible member 51 is stage clip, and the bottom protrusion of contact installation cavity 501 is provided with and connects with stage clip one end Fixed fixing lug boss 508 is connect, the lower surface protrusion of contact bridge is provided with installs fixed fixed lobe with the other end of stage clip.

Further, the contact bridge often holds the card that is clasped of side wall for being provided with towards both sides protrusion and 5 being supported with contact Button raised 504.

Further, the contact supports that 5 top both sides protrusion is provided with extending column 52, is formed between the extending column 52 of both sides Evade groove 53, the end direction of extending column 52 is evaded the protrusion of groove 53 and is provided with the linkage projection 521 coordinated with operating mechanism.

Further, also it is installed on the hand of hull outside and operating mechanism linkage including the operating mechanism being installed in housing Handle, the contact support 5 with operating mechanism linkage, handle band pneumatic operating mechanism acts, drive contact to support 5 actions connecting and Disjunction circuit, the operating mechanism includes support, energy-stored spring 8 and actuated element；One end of support is connected with handle, energy storage bullet Spring 8 is installed on support, and actuated element carries out spacing to energy-stored spring 8；When handle drives support to act, energy-stored spring 8 is passed It is dynamic that element is spacing carries out energy storage, when the Spring driving power of energy-stored spring 8 is sufficient so that actuated element drives contact to support 5, storage The energy release elastic force of spring 8 causes that contact supports 5 to act.

Further, the housing include pedestal 1, the pedestal cover plate 2 being installed on pedestal 1 and be installed on it is upper on cover plate 2 Lid 3, the operating system is installed on pedestal cover plate 2；The handle is rotary switch 4, and rotary switch 4 is arranged on upper lid 3, Support is located at the lower section of rotary switch 4, and energy-stored spring 8 is set on support, and actuated element is located at support lower section, and contact supports position In support lower section, rotation turn switch 4 drives holder pivots, and actuated element is spacing to carry out energy storage to energy-stored spring 8.

Further, the support includes rack shaft 6 and is connected to the support flap 7 of the one end of rack shaft 6, rack shaft 6 other end is connected with rotary switch 4, and energy-stored spring 8 is held on support flap 7；The actuated element includes mechanism's rotating shaft 9 With the slide plate 10 for being connected to the one end of mechanism's rotating shaft 9, the other end of mechanism's rotating shaft 9 and contact support that 5 be connecteds, and slide plate 10 is positioned at support The lower section of flap 7；The energy-stored spring 8 is torsion spring, and one end of torsion spring is provided with two end arms 81, two end arms 81 to both sides extension The same side of support flap 7 and slide plate 10 is extended to, 6 two end arms 81 of swinging mounting rotating shaft can be with support flap 7 and slide plate 10 It is engaged, torsion spring is rotated during swinging mounting rotating shaft 6, an end arms 81 of torsion spring is by the spacing generation elastic deformation storage of slide plate 10 Energy.

Further, the support flap 7 and slide plate 10 are U-shape structure, the U-shaped opening of support flap 7 and slide plate 10 upward, Support flap 7 is be arranged in parallel with slide plate 10, and support flap 7 is stretched in inside the U-shaped opening of slide plate 10；The support flap 7 includes The rack body 71 at middle part includes middle part with a support end arms 72 for being connected to the two ends of rack body 71, slide plate 10 is respectively perpendicular Skateboard body 101 and be respectively perpendicular a slide plate end arms 102 for being connected to the two ends of skateboard body 101, two support end arms 72 With two the same sides of end arms 81 that two slide plate end arms 102 are located at torsion spring.

The utility model load switch is optimized to the structure that contact is supported, is increased in the top of contact installation cavity and is prolonged Stretch cavity, loaded on after contact installation cavity, need not be in the case of first compression spring, contact bridge first can be filled vertically flexible member Enter and extend cavity, then assembling is completed by overturning compression elastic element；The extension cavity can cause the thickness base of whole part This is uniform, reduces due to the injection defect that design is caused.Extend the Breadth Maximum of the height more than contact bridge of cavity.The extension Minimum widith of the width of cavity less than contact bridge.

Brief description of the drawings

Fig. 1 is the structural representation that the utility model operating mechanism and pedestal cover plate are installed；

Fig. 2 is the structural representation of the utility model operating mechanism；

Fig. 3 is the structural representation of the utility model support and energy-stored spring；

Fig. 4 is the structural representation of the utility model actuated element；

Fig. 5 is the structural representation of the bottom of the utility model actuated element；

Fig. 6 is the structural representation of the utility model pedestal；

Fig. 7 is the structural representation of wiring base before the utility model plate；

Fig. 8 is the structural representation of wiring base after the utility model plate；

Fig. 9 is the structural representation of the utility model pedestal frame；

Figure 10 is the schematic diagram of the utility model base side boards；

Figure 11 is the assembly structure figure of the support of the utility model contact and contact bridge；

Figure 12 is the scheme of installation of the support of the utility model contact and stage clip；

Figure 13 is the schematic diagram of lid and rotary switch on the utility model；

Figure 14 is the schematic diagram in lid and another orientation of rotary switch on the utility model；

Figure 15 is the polycrystalline substance schematic diagram of the utility model rotary switch；

Figure 16 is the structural representation covered on the utility model.

Specific embodiment

Below in conjunction with the embodiment that accompanying drawing 1 to 16 is given, the specific reality of load switch of the present utility model is further illustrated Apply mode.Load switch of the present utility model is not limited to the following description.

As illustrated in figs. 1-16, the utility model load switch, including the shell being made up of pedestal 1, pedestal cover plate 2 and upper lid 3 Body.The open top of the pedestal 1, pedestal cover plate 2 is fastened on pedestal 1, and contact system is provided with inside pedestal 1.Base seat lid Operating mechanism is installed, the open top of pedestal cover plate 2, upper lid 3 is fastened on pedestal cover plate 2 on plate 2.It is provided with upper lid 3 Handle, embodiments given below handle is rotary switch 4.The utility model load switch is simple and compact for structure.

Specifically, the utility model load switch provides a load switch for three poles.Contact system is supported including contact 5, the moving contact that contact is supported on 5 is installed on, and be fixed on the static contact of both sides on pedestal 1, moving contact and static contact is relative sets Put.Turning knob switch 4, rotary switch 4 is acted with pneumatic operating mechanism so that moving contact is contacting and separating to connect with static contact With disjunction circuit.It is clear that load switch of the present utility model can also be monopole, bipolar or more multipole.

As Figure 1-5, the utility model load switch, handle band pneumatic operating mechanism is acted, and drives contact to support 5 to act Include support, energy-stored spring 8 and actuated element with disjunction circuit, the operating mechanism to connect；One end of support connects with handle Connect, energy-stored spring 8 is installed on support can be acted with support, actuated element carries out spacing to energy-stored spring 8；Handle drives When support is acted, energy-stored spring 8 is transmitted that element is spacing to carry out energy storage, when the Spring driving power of energy-stored spring 8 is sufficient so that pass When dynamic element drives contact supports 5, the release elastic force of energy-stored spring 8 causes that contact supports 5 to act.The utility model load switch, Support is set, and energy-stored spring and actuated element, energy-stored spring are installed on support, actuated element energy-stored spring is carried out it is spacing, Rotate handle and drive support action, energy-stored spring is transmitted that element is spacing to carry out energy storage, when the Spring driving power foot of energy-stored spring During causing that actuated element drives contact to support, energy-stored spring release elastic force causes that contact support is acted, the elastic force of closing of circuit There is provided by energy-stored spring, contact closure is relatively reliable, handle operation is more smooth.

As shown in Fig. 1-5,13, the handle is rotary switch 4, and rotary switch 4 is arranged on upper lid 3, and support is located at rotation The lower section of button switch 4, energy-stored spring 8 is set on support, and actuated element is located at support lower section, and contact is supported to be located under support Side, rotation turn switch 4 drives holder pivots, and actuated element is spacing to carry out energy storage to energy-stored spring 8.

As Figure 1-5, the support includes rack shaft 6 and is connected to the support flap 7 of the one end of rack shaft 6, branch The other end of frame rotating shaft 6 is connected with rotary switch 4, and energy-stored spring 8 is held on support flap 7；The actuated element includes machine Structure rotating shaft 9 and the slide plate 10 for being connected to the one end of mechanism's rotating shaft 9, the other end and contact of mechanism's rotating shaft 9 support that 5 are connected, slide plate 10 Positioned at the lower section of support flap 7；The energy-stored spring 8 is torsion spring, and one end of torsion spring is provided with two end arms 81, two to both sides extension Bar end arms 81 extends to the same side of support flap 7 and slide plate 10, and 6 two end arms 81 of swinging mounting rotating shaft can be with support flap 7 It is engaged with slide plate 10, torsion spring is rotated during swinging mounting rotating shaft 6, an end arms 81 of torsion spring is by the spacing generation elasticity of slide plate 10 Deformation energy storage.The overall structure of the utility model operating system is simply compact.

Specifically, the support flap 7 and slide plate 10 are U-shape structure, the U-shaped opening of support flap 7 and slide plate 10 upward, Support flap 7 is be arranged in parallel with slide plate 10, and support flap 7 is stretched in inside the U-shaped opening of slide plate 10；The support flap 7 includes The rack body 71 at middle part includes middle part with a support end arms 72 for being connected to the two ends of rack body 71, slide plate 10 is respectively perpendicular Skateboard body 101 and be respectively perpendicular a slide plate end arms 102 for being connected to the two ends of skateboard body 101, two support end arms 72 With two the same sides of end arms 81 that two slide plate end arms 102 are located at torsion spring.No matter clockwise or counterclockwise runing rest turns Axle 6, support flap 7 drives torsion spring to rotate, and one of end arms of torsion spring is by its spacing storage of middle slide plate end arms 102 of slide plate 10 Can, when the Spring driving power of torsion spring is sufficient so that actuated element drives contact to support 5, the release elastic force of energy-stored spring 8 causes to touch Head supports 5 to act.The utility model uses support flap 7 and slide plate 10 for U-shape structure is coordinated with torsion spring, and structure design is skilful It is wonderful, it is simple compact.

As in Figure 2-4, every support end arms 72 is provided with the limit with the spacing cooperation of two end arms 81 of energy-stored spring 8 Position groove 701.Two end arms 81 are limited that the institute of groove 701 is spacing, and the fixed structure of torsion spring is more reliable and more stable, prevents torsion spring from taking off Fall.One end of the rack shaft 6 is provided with the kidney-shaped plate 61 being fixedly connected with support flap 7, the rack body 71 of support flap 7 Middle part be provided with the corresponding mounting hole 71 being fixedly connected with kidney-shaped plate 61.Kidney-shaped plate 61 and mounting hole 71 coordinate so that support turns Axle 6 and support flap 7 are connected, it is therefore apparent that kidney-shaped plate 61 and mounting hole 71 are it can also be provided that other shapes.Especially, originally The rack shaft 6 and support flap 7 of utility model can use integrally formed structure.One end protrusion of mechanism's rotating shaft 9 The connection bump 901 being fixedly connected with slide plate 10 is provided with, the middle part of the skateboard body 101 of the slide plate 10 is provided with and connection bump The 901 corresponding connecting grooves 103 being fixedly connected.Connection bump 901 and connecting groove 103 all use rectangle in the present embodiment Structure, it is clear that, it is also possible to using the fixed structure of other shapes, the length of connecting groove 103 is more than connection bump 901 Length so that the position of slide plate 10 can be adjusted.One end of the rack shaft 6 is provided with extension rod 62, the connection bump 901 middle parts are provided with the corresponding extension slot 9011 installed with extension rod 62.During installation, in the insertion extension slot 9011 of extension rod 62, So that the installation site of support and actuated element is accurately positioned.

As shown in Fig. 1,2,5, mechanism's rotating shaft 9 includes cylinder axis body 91 and is connected to the installation of the one end of cylinder axis body 91 Face 92, slide plate 10 is installed on mounting surface 92, and the lateral wall of cylinder axis body 91 is provided with supports 5 helical grooves being connected with contact 911.The one end open of the pedestal cover plate 2, middle part forms the installation cavity 201 for installation operation mechanism, pedestal cover plate 2 Bottom extend to both sides and be provided with terminal plate 21, what the cylinder axis body 91 that the bottom of installation cavity 201 is provided with mechanism's rotating shaft 9 was passed through Inserting hole, mechanism's rotating shaft 9, slide plate 10, support flap 7, rack shaft 6 and energy-stored spring 8 are installed on installation after assembling successively empty In chamber 201, the cylinder axis body 91 of mechanism's rotating shaft 9 passes the lower section for stretching to pedestal cover plate 2 from inserting hole.

As depicted in figs. 11-12, the utility model load switch, the contact supports that 5 are provided with for installing contact bridge Contact installation cavity 501, contact bridge is installed on contact and supports in 5 contact installation cavity 501 by flexible member 51, described to touch The top of head installation cavity 501 is provided with the extension cavity 502 set with the insertion of contact installation cavity 501；During installation, flexible member 51 first loaded in contact installation cavity 501, and first vertical loading extends in cavity 502 contact bridge, the downward elasticity of compression unit of contact bridge Part 51 is moved in contact installation cavity 501 and overturn to horizontal, installs empty by installation elastic force and the contact of flexible member 51 The upper side wall in chamber 501 offsets and is installed in contact installation cavity 501.The utility model load switch enters to the structure that contact is supported Row optimization, increases in the top of contact installation cavity and extends cavity, and flexible member need not pressed first loaded on after contact installation cavity In the case of contracting spring, contact bridge first can vertically load extension cavity, then complete assembling by overturning compression elastic element；Should Extending cavity can cause that the thickness of whole part is substantially uniform, reduce due to the injection defect that design is caused.

Especially, Breadth Maximum of the height for extending cavity 502 more than contact bridge so that contact bridge can vertically be put It is placed in inside extension cavity 502.Minimum widith of the width for extending cavity 502 less than contact bridge so that contact bridge overturns To horizontality, can be offseted fixation with the upper side wall of contact installation cavity 501.

As depicted in figs. 11-12, the flexible member 51 is stage clip, and the bottom protrusion of contact installation cavity 501 is provided with and pressure The fixing lug boss 508 that spring one end is connected, the lower surface protrusion of contact bridge is provided with installs fixed consolidating with the other end of stage clip Fixed projection.The two ends of stage clip are fixed by fixing lug boss 508 and fixed lobe respectively, stabilized structure.The contact bridge it is every Hold the buckle projection 504 for being provided with towards both sides protrusion and being clasped with the side wall of contact support 5.

As shown in Fig. 2,11-12, the contact supports that 5 top both sides protrusion is provided with extending column 52, the extending column of both sides Formed between 52 and evade groove 53, the end direction of extending column 52 is evaded the protrusion of groove 53 and is provided with the linkage coordinated with operating mechanism Raised 521, linkage raised 521 is connected cooperation with helical groove 9101.

As shown in figures 13-16, the utility model load switch, the rotary switch 4 and upper lid 3 are provided with sealed with padlock Pad lock structure 3A；When only rotary switch 4 rotates on closed mode, rotation could be pinned by the way that padlock and pad lock structure are sealed Button switch 4.The utility model load switch, the pad lock structure sealed with padlock is respectively equipped with rotary switch and upper lid, only Have when rotary switch rotates on closed mode, the sealed rotary switch of padlock ability can completely avoid client's false-lock, improve electricity consumption Safety.

As illustrated in figs. 13-14, the pad lock structure includes snap ring 301 of the protrusion on the upper lid 3 and located at rotary switch 4 On the draw-in groove 401 corresponding with snap ring 301；The snap ring 301 is close to rotary switch 4 and is set, and the middle part of snap ring 301 is provided with extension The lockhole 302 that the lock bridge of lock is passed through, when rotary switch 4 rotates on closed mode, draw-in groove 401 and snap ring 301 are in relative position Put.Only when rotary switch 4 rotates on closed mode, draw-in groove 401 and snap ring 301 could be constituted the utility model pad lock structure Pairing structure, padlock can just be installed with pad lock structure and coordinated, and pin rotary switch 4.

As illustrated in figs. 13-15, the rotary switch 4 includes handle 41 and is connected to the discoid rotation of the lower section of handle 41 Disk 42, the depression of the draw-in groove 401 is in rotating disk 42.The rotating disk 42 is provided with and padlock in the both sides protrusion of draw-in groove 401 Lock bridge coordinate spacing preiection 402.Spacing preiection 402 causes that padlock more fastens reliability with the assembling structure of pad lock structure.

As shown in Figure 13,14,16, the bottom opening of the upper lid 3, middle part is provided with lower section operating mechanism and stretches into and opened with knob 4 perforates 303 for realizing linkage are closed, the protrusion of the snap ring 301 is located at the top of upper lid 3.

As shown in figures 15-16, the top of the upper lid 3 is located at the right angle convex tendon for limiting the rotational steps of rotary switch 4 31, the bottom of the rotating disk 42 is provided with installation cavity 421, and the side wall protrusion of installation cavity 421 is provided with and is limited with right angle convex tendon 31 The limiting card button block 422 that position coordinates.Limiting card button block 422 coordinates the rotating range of limitation rotary switch 4 with right angle convex tendon 31.

As illustrated in figures 6-10, the open top of the pedestal 1, pedestal 1 includes pedestal frame 111 and is installed on 111 liang of pedestal frame The base side boards 112 of side, the base side boards 112 offer the wiring hole 1121 for wiring, base in the position near one end One end that seat side plate 112 sets wiring hole 1121 loads the both sides of pedestal frame 112 for wiring before plate, or base side boards down The both sides that one end of 112 setting wiring holes 1121 loads pedestal frame 112 upward are used for wiring after plate.The utility model load is opened Close, pedestal is divided into the base side boards of pedestal frame and both sides, wiring hole is set in base side boards, one end of base side boards can court Both sides that are upper or being installed on pedestal frame down, can as needed exchange mounting means, to adapt to wiring after wiring and plate before plate, The versatility of pedestal is high, cost reduction.

As shown in figs. 9-10, base side boards 112 are rectangular flat plate, the two lateral walls point of the both sides of pedestal frame 111 The mounting groove 1111 installed with the base side boards 112 of corresponding side and coordinated is not provided with.During installation, the both sides difference of base side boards 112 Install on the both sides madial wall with pedestal frame 111, install quick and convenient.Specifically, the mounting groove 111 is rectangular recess, The side of base side boards 112 is installed the end for coordinating with mounting groove 111 and is provided with the installation chamfering 1123 for being easy to assembling, installs chamfering 1123 cause that the installation of base side boards 112 is more smooth.

As shown in figs. 9-10, side protrusion is provided with the interpolar dividing plate for separating each phase to the base side boards 112 outwardly 1122.The inside both sides of the pedestal frame 111 are provided with the phase partition 1112 for separating each pole conducting system.

As shown in Fig. 1,13, the side wall protrusion of pedestal cover plate 2 is located at the buckle projection 208 coordinated with upper cover latch, upper lid 3 Side wall offer the corresponding snap-fit grooves 305 being clasped with buckle projection 208.Upper lid 3 is by snap-fit grooves 305 and card Raised 208 cooperation of button is snapped connection on pedestal cover plate 2.

The installation process of the utility model load switch is illustrated below：

Base side boards 112 being respectively mounted in the both sides of pedestal frame 111 and being assembled into pedestal 1, moving contact is installed on contact branch Hold on 5, static contact is installed on the respective sides position of pedestal 1, the contact of assembling is supported the sky at 5 middle parts for being installed on pedestal 1 Inside chamber；Installation is installed on after mechanism's rotating shaft 9, slide plate 10, support flap 7, rack shaft 6 and energy-stored spring 8 are assembled successively In cavity 201, the cylinder axis body 91 of mechanism's rotating shaft 9 passes the lower section for stretching to pedestal cover plate 2 from inserting hole, and operating mechanism is installed on On pedestal cover plate 2, pedestal cover plate 2 is fastened on pedestal 1；Upper lid 3 is snapped connection on pedestal cover plate 2；Finally, rotation is installed Button switch 4 completes whole assembling.

Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all regarded To belong to protection domain of the present utility model.

Claims

1. a kind of load switch, including the contact system in housing and housing, it is characterised in that：The contact system includes contact Support (5), the contact supports that (5) are provided with the contact installation cavity (501) for installing contact bridge, and contact bridge is by elasticity Element (51) is installed on contact and supports in the contact installation cavity (501) of (5), is set above the contact installation cavity (501) There is the extension cavity (502) set with contact installation cavity (501) insertion；

During installation, first loaded in contact installation cavity (501), first vertical loading extends cavity to contact bridge to flexible member (51) (502) in, the downward compression elastic element of contact bridge (51) is moved in contact installation cavity (501) and overturn to horizontal, is relied on The installation elastic force of flexible member (51) offsets with the upper side wall of contact installation cavity (501) and is installed on contact installation cavity (501) It is interior.

2. load switch according to claim 1, it is characterised in that：The height for extending cavity (502) is more than contact The Breadth Maximum of bridge.

3. load switch according to claim 1, it is characterised in that：The width for extending cavity (502) is less than contact The minimum widith of bridge.

4. load switch according to claim 1, it is characterised in that：The flexible member (51) is stage clip, and contact is installed The bottom protrusion of cavity (501) is provided with the fixing lug boss (508) being connected with stage clip one end, and the lower surface protrusion of contact bridge sets Have and fixed fixed lobe is installed with the other end of stage clip.

5. load switch according to claim 1, it is characterised in that：The often end of the contact bridge is provided with towards both sides protrusion Support that the buckle that the side wall of (5) is clasped is raised (504) with contact.

6. load switch according to claim 1, it is characterised in that：The contact supports that the top both sides protrusion of (5) sets There is extending column (52), formed between the extending column (52) of both sides and evade groove (53), the end of extending column (52) is recessed towards evading Groove (53) protrusion is provided with linkage projection (521) coordinated with operating mechanism.

7. load switch according to claim 1, it is characterised in that：Also include the operating mechanism being installed in housing, peace Handle loaded on hull outside and operating mechanism linkage, the contact supports that (5) link with operating mechanism, and handle drives operation machine Structure act, drive contact support (5) action come connect with disjunction circuit, the operating mechanism include support, energy-stored spring (8) and Actuated element；One end of support is connected with handle, and energy-stored spring (8) is installed on support, and actuated element enters to energy-stored spring (8) Row is spacing；When handle drives support to act, energy-stored spring (8) is transmitted that element is spacing to carry out energy storage, when the bullet of energy-stored spring (8) When spring driving force is sufficient so that actuated element driving contact support (5), energy-stored spring (8) release elastic force causes that contact supports (5) Action.

8. load switch according to claim 7, it is characterised in that：The housing includes pedestal (1), is installed on pedestal (1) pedestal cover plate (2) on and the upper lid (3) being installed on cover plate (2), the operating system are installed on pedestal cover plate (2)； The handle is rotary switch (4), and on upper lid (3), support is located at the lower section of rotary switch (4), storage to rotary switch (4) Energy spring (8) is set on support, and actuated element is located at support lower section, and contact is supported to be located at below support, rotation turn switch (4) holder pivots are driven, actuated element is spacing to carry out energy storage to energy-stored spring (8).

9. the load switch according to claim 7 or 8, it is characterised in that：The support includes rack shaft (6) and connection In the support flap (7) of rack shaft (6) one end, the other end of rack shaft (6) is connected with rotary switch (4), energy-stored spring (8) it is held on support flap (7)；The actuated element includes mechanism's rotating shaft (9) and is connected to the cunning of mechanism's rotating shaft (9) one end Plate (10), the other end and the contact of mechanism's rotating shaft (9) support that (5) are connected, lower section of the slide plate (10) positioned at support flap (7)；Institute It is torsion spring to state energy-stored spring (8), and one end of torsion spring is provided with two end arms (81) to both sides extension, and two end arms (81) extend to branch The same side of frame flap (7) and slide plate (10), (6) two end arms (81) of swinging mounting rotating shaft can be with support flap (7) and slide plate (10) it is engaged, torsion spring is rotated during swinging mounting rotating shaft (6), and an end arms (81) of torsion spring is by the spacing generation bullet of slide plate (10) Property deformation energy storage.

10. load switch according to claim 9, it is characterised in that：The support flap (7) and slide plate (10) are U-shaped Upward, support flap (7) be arranged in parallel the U-shaped opening of structure, support flap (7) and slide plate (10) with slide plate (10), and support turns Plate (7) is stretched in inside the U-shaped opening of slide plate (10)；Rack body (71) of the support flap (7) including middle part and hang down respectively A direct-connected support end arms (72) for being connected on rack body (71) two ends, skateboard body (101) of the slide plate (10) including middle part and It is respectively perpendicular a slide plate end arms (102) for being connected to skateboard body (101) two ends, two support end arms (72) and two slide plates End arms (102) is positioned at two the same sides of end arms (81) of torsion spring.