CN203521227U - Switch with power-off protection function - Google Patents
Switch with power-off protection function Download PDFInfo
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- CN203521227U CN203521227U CN201320710925.6U CN201320710925U CN203521227U CN 203521227 U CN203521227 U CN 203521227U CN 201320710925 U CN201320710925 U CN 201320710925U CN 203521227 U CN203521227 U CN 203521227U
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- armature
- button assembly
- tongue piece
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Abstract
The utility model discloses a switch with a power-off protection function. The switch comprises a shell, a button component, at least one set of a coil static contact and a coil moving contact which are used for switching on a coil component, and at least one set of a main static contact and a main moving contact which are used for switching on a load circuit. The coil moving contact and the main moving contact are fixedly arranged on a moving contact frame, and the coil moving contact is an elastic element. Distance between the coil moving contact and the coil static contact is less than the distance between the main moving contact and the main static contact. The moving contact frame is fixedly provided with an armature. One end, which is far from a contact point of a contact component, of the armature is hinged on the coil component, and the other end of the armature moves upwardly and downwardly under driving of the button component. The armature is provided with an armature returning device which drives the armature to return. The external side of the shell is provided with a locking device which locks the button component on the bottom part position. When power is off, the main moving contact is separated from the main static contact so that an electric tool does not work automatically even the button component is pressed and power is on, and thus operation safety is enhanced.
Description
Technical field
The utility model relates to motor switch field, particularly relates to a kind of switch with power-off protection function.
Background technology
For the ease of the control operation to electric tools such as electric drill, electric hammer, electric grinders, its control switch is generally all arranged on the position of grip forefinger.Traditional Push switch is mainly by pressing button, and band action contact frame moves downward, and the moving contact that makes to be arranged on action contact frame contacts On current with the fixed contact being arranged on base, and then makes electric tool work.Because the vibration of most electric tools is in use more violent, at this moment the finger of control switch can not keep being pressed on all the time because of vibration the button place of switch, thus cause between moving contact and fixed contact contact unstable.In order to improve the stability of dynamic/static contact contact in switch, conventionally on electric power tool shell, be provided with cage knob, to guarantee that switch is all the time in on-state.Once but there is in use unexpected power outage; operating personnel often forget the locking of releasing cage knob to dynamic/static contact; while again sending a telegram here; electric tool is worked suddenly in the extemporal situation of staff's milli at the scene; this tends to cause device damage or personal injury accident occurs, and just need to develop a kind of switch with power-failure protecting function for this reason.
As Chinese patent literature CN101882523A discloses a kind of trigger of restarting defencive function with power failure, it is mainly comprised of base body, shell, trigger, cage knob, yoke, coil, magnetic core and armature; Wherein, base body, shell, trigger, cage knob and relevant structural detail form the mechanical structure part of switch, and yoke, coil, magnetic core and armature and relevant electromagnetic component form the electromagnetic structure part of switch.This switch when power-off, solenoid dead electricity, armature promotes lock hook and is no longer affiliated to cage knob, thereby makes trigger remove locking, makes the circuit of electric tool disconnect under the effect of back-moving spring, plays the effect of power-off protection.But; if switch is held in hand while having a power failure; or touch other object while placing; cause button all the time in pressured state; can not give up the throne to open position, now switch inside always in on-state, while again sending a telegram here; electric tool can be worked immediately, and the trigger that defencive function is restarted in therefore this band power failure still exists larger potential safety hazard in actual use.
At present, even if can solve button pressurized while having a power failure, the main solution that also can make the dynamic/static contact in switch disconnect is between tool side circuit and switch, to increase wiring board module, mode by electronics solves, but no matter electronic form is not all very desirable the aspect such as connecting aspect the reliability of breaking capacity, components and parts, cost, is badly in need of a kind of other mode and solves.
Utility model content
For this reason; the technical problems to be solved in the utility model is to prevent that electric tool from starting voluntarily after power-off; and then cause the problem of serious potential safety hazard; the switch with power-off protection function that the utility model provides at its button of power-off protection position without giving up the throne; even button receives compressing during power-off; still can disconnect electric tool input circuit, play the effect of power-off protection.
For achieving the above object, the utility model is by the following technical solutions:
A switch with power-off protection function, comprises housing; Button assembly, described button assembly is slidably mounted on described enclosure interior; Contact assembly, described contact assembly comprises at least one group of coil fixed contact for closing coil assembly, coil moving contact, and at least one group of main fixed contact, active contact that is used for connecting load circuit; Described coil fixed contact, described main fixed contact are fixedly installed on described enclosure interior, and described coil moving contact, described active contact are fixedly installed on action contact frame, and described coil moving contact is flexible member; Distance between described coil moving contact and described coil fixed contact is less than the distance between described active contact and described main fixed contact; On described action contact frame, be also fixed with armature, one end away from described contact assembly contact of described armature is articulated with on described coil block, the other end is realized and being moved up and down under the driving of described button assembly, and described armature is provided with the armature resetting means that drives described armature to reset; Described hull outside is provided with for described button assembly being locked in to the locking device of bottom position; The middle part of described button assembly is provided with die cavity, in described die cavity, be hinged with tongue piece, the upper end of described tongue piece is provided with the Access Division of extending to a side of described armature, and the side of described tongue piece is provided with the portion that turns that drives described tongue piece to rotate, and is also provided with the location division to described tongue piece location in described die cavity; While connecting circuit, described tongue piece is downward with described button assembly, and drive described armature to move downward, after first described coil moving contact contacts with described coil fixed contact, described in described coil block generation magnetic field suction, armature moves downward, drive and keep described active contact to contact with described main fixed contact, connecting load circuit; After circuit is connected, described button assembly continues to move downward to bottom position, simultaneously, the portion of turning drives described tongue piece to rotate around jointed shaft, and makes the vertical projection of described Access Division depart from the upper surface of described armature, and described button assembly is arranged on the locking device locking of described hull outside; Now after power-off, described coil block dead electricity, described armature resets under the effect of armature resetting means, and drives described active contact and described main fixed contact to keep released state; During open circuit, described locking device is removed the locking to described button assembly, described button assembly moves up to initial position, and drive described coil moving contact separated with described coil fixed contact, described in the portion of turning drive the rotation of described tongue piece to the vertical projection that makes described Access Division, to be positioned at the upper surface of described armature.
The described portion of turning comprises ramp, the lower inclined plane away from described armature one side that is molded over described tongue piece; And be arranged on described housing inner side, coordinate respectively the convex platform, the lower convex platform that drive with described ramp, lower inclined plane; When described tongue piece moves downward to bottom position from described coil moving contact and the firm contact position of described coil fixed contact, described lower convex platform coordinates with described lower inclined plane and drives described tongue piece rotation to the vertical projection of the described Access Division position away from the upper surface of described armature; When described tongue piece moves to described initial position by described bottom position, described convex platform coordinates with described ramp, drives described tongue piece rotation to the vertical projection of described Access Division to be positioned on the position of upper surface of described armature; The maximum anglec of rotation of described tongue piece is limited in described location division.
Described location division comprises the retainer spring being vertically arranged under described tongue piece, and the lower end abutment of described retainer spring is in the bottom of described die cavity, and the upper end of described retainer spring is against on described tongue piece; The jointed shaft of described tongue piece has at least one side to be provided with spacing block set in axial two sides, and described spacing block set is positioned at the limited impression of described die cavity inwall; When described tongue piece rotates forward or backwards, described retainer spring take its lower end as fulcrum swing and energy storage or release can, described retainer spring release can time from the lower end of described tongue piece, drive the corresponding wall close contact of described spacing block set and described limited impression.Described button assembly is extended with boss to the side near described coil moving contact, described boss is positioned at described coil moving contact below, while driving described button assembly to move up, described boss coordinates with described coil moving contact to be realized described coil moving contact and moves up.
One side of the close described boss of described coil moving contact end is provided with the extension coordinating with described boss.
Described active contact and described coil moving contact are riveted on respectively the relative both sides of described action contact frame, and described armature is riveted in the centre position of described action contact frame.
Described coil block comprises coil and supports the bracing frame of described coil, and described armature is hinged on the side plate away from described contact one side of support frame as described above.
One end away from described coil block of described armature is provided with groove, and the side plate away from described button assembly of described coil block is provided with upwardly extending projection, and described groove is plugged into realizes described armature in described projection and described coil block is articulated and connected.
Described armature resetting means is extension spring, one end of described extension spring is articulated to the end away from described button assembly of described armature, and making described groove between described extension spring and described button assembly, the other end of described extension spring is connected with the lower end of described coil component coil block.
Described locking device comprises along the direction of motion of described button assembly and is slidably arranged in the connecting rod between described housing and described button assembly, the upper end of described connecting rod is connected with the upper end of described button assembly, the lower end of described connecting rod is hinged with cage knob, described cage knob is provided with lock dog, the outside of described housing is provided with locked groove, and described lock dog rotates and snaps in described locked groove to limit described button assembly motion around jointed shaft.
The below of described button assembly is provided with and drives its push-button reset device moving upward, and described push-button reset device is back-moving spring, and one end of described back-moving spring is against the lower end of described button assembly, and its other end is against the bottom of described housing inner chamber.
One side of the close described active contact of described button assembly is also provided with boss, and described boss extends to the below of described active contact; The described boss of described active contact one side is lower than the described boss of the first side of described coil movable contact.
The beneficial effects of the utility model:
1. in the switch with power-off protection function of the present utility model, coil moving contact, initiatively contact is flexible member, and button assembly has initial position and bottom position; And in hull outside, be provided with the locking device that button assembly is locked in to bottom position; When button assembly drives armature downwards by tongue piece, coil moving contact is contacted with coil fixed contact, then by coil block, produce magnetic field suction armature and move downward, and then initiatively contact is contacted with main fixed contact, for motor switch On current, the locked device locking of button assembly simultaneously; Under the magnetic fields producing at solenoid, coil moving contact and coil fixed contact, initiatively contact remains and contacts with main fixed contact.While having a power failure suddenly, the magnetic field that described coil block produces disappears, and coil moving contact is separated with coil fixed contact and main fixed contact respectively under the effect of resetting means with active contact, and now, even if again send a telegram here, electric tool can not worked yet; In addition; the button of cut-offing protecting switch of the present utility model is outwards given up the throne without button; even if button assembly is subject to external force pressure, the function of power-off protection still can be realized in its inside, and therefore the switch with power-off protection function of the present utility model has better security performance.
2. main fixed contact of the present utility model is driven by solenoid with the connection of active contact, and response rapidly, guarantees that switch can be by the requirement of testing at a slow speed.
3. circuit disjunction of the present utility model is to rely on the boss propelling coil moving contact on button assembly separated with coil fixed contact, after making coil block power-off, magnetic field rapidly disappears, under the effect of extension spring, main fixed contact disconnects rapidly with active contact, and then improves the quick breaking capacity of switch.
4. the side near active contact of the utility model button assembly is also provided with boss, and make it extend to the initiatively vertical below of contact, it is mainly in order to prevent that initiatively contact and main fixed contact are because working long hours or other reason sticks together cannot disjunction time that this place arranges boss, the boss at this place can promote initiatively contact and move upward, realize pressure disjunction, thereby further improve the breaking capacity of whole switch.
Accompanying drawing explanation
For the content of utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the overall structure explosive view of the utility model switch;
Fig. 2 is the electrical schematic diagram of the utility model switch;
Fig. 3 is the vertical view of the utility model switch;
Fig. 4 is that the A-A of switch of the present utility model when initial position is to cutaway view;
Fig. 5 is that the B-B of switch of the present utility model when initial position is to partial sectional view;
Fig. 6 is that switch of the present utility model is pressed downwards to coil dynamic/static contact and rigidly connected A-A while touching to cutaway view;
Fig. 7 is that switch of the present utility model is pressed downwards to coil dynamic/static contact and rigidly connected B-B while touching to partial sectional view;
Fig. 8 is that the coil adhesive armature of switch of the present utility model the A-A while keeping are to cutaway view;
Fig. 9 is that the A-A of switch of the present utility model when bottom position is to cutaway view;
Figure 10 is that the A-A of switch of the present utility model when power-off is suddenly to cutaway view;
Figure 11 is that the B-B of switch of the present utility model when power-off is suddenly to cutaway view;
Figure 12 is that the A-A of the ramp of the utility model tongue piece while coordinating with the convex platform of housing is to cutaway view;
The structural representation that Figure 13 is projection on the utility model button assembly when extension on coil moving contact coordinates;
Figure 14 is the structure explosive view of the utility model button assembly;
Figure 15 is the structural representation of the another kind of execution mode of the utility model button assembly;
Figure 16 is the structural representation of locking device of the present utility model when button assembly is not locked;
Figure 17 is the structural representation of locking device of the present utility model when button assembly is locked;
Figure 18 is that the C-C of Figure 16 is to cutaway view.
In figure, Reference numeral is expressed as:
1-housing; The upper earthen platform of 110-; 120-lower convex platform; 2-button assembly; 21-die cavity; 210-limited impression; 22-tongue piece; 220-Access Division; 221-ramp; 222-lower inclined plane; 223-retainer spring; 224-spacing block set; 225-jointed shaft; 3-contact assembly; 31-coil fixed contact; 32-coil moving contact; The main fixed contact of 33-; 34-is contact initiatively; 35-action contact frame; 36-armature; 360-groove; 38-boss; 39-extension; 4-coil block; 41-side plate; 410-projection; 5-extension spring; 6-back-moving spring; 71-connecting rod; 72-cage knob; 73-lock dog; 74-locked groove; 75-spring.
Embodiment
Referring to Fig. 1-2, a kind of switch with power-off protection function, comprises housing 1; Button assembly 2, described button assembly 2 is slidably mounted on described housing 1 inside; Contact assembly 3, described contact assembly 3 comprises at least one group of coil fixed contact 31 for closing coil assembly 4, coil moving contact 32, and at least one group of main fixed contact 33, active contact 34 that is used for connecting load circuit; In this enforcement, described coil fixed contact 31, described coil moving contact 32, and described main fixed contact 33, described active contact 34 arrange respectively one group, certainly, also can arrange many groups according to specific needs.Described coil fixed contact 31, described main fixed contact 33 are fixedly installed on described housing 1 inside, and described coil moving contact 32, described active contact 34 are fixedly installed on action contact frame 35, and described coil moving contact 32, described active contact 34 are flexible member; Distance between described coil moving contact 32 and described coil fixed contact 31 is less than the distance between described active contact 34 and described main fixed contact 33; On described action contact frame 35, be also fixed with armature 36, one end away from described contact assembly 3 contacts of described armature 36 is articulated with on described coil block 4, its other end is realized and being moved up and down under the driving of described button assembly 2, is also that described armature 36 is around its jointed shaft rotation; Described armature 36 is provided with the armature resetting means that drives described armature 36 to reset, concrete structure as present embodiment, described armature resetting means is extension spring 5, one end of described extension spring 5 is articulated to the end away from described button assembly 2 of described armature 36, and making described groove 360 between described extension spring 5 and described button assembly 2, the other end of described extension spring 5 is connected with the lower end of described coil component coil block 4; When described button assembly 2 drives being rotated down of described armature 36, one end of the installation extension spring 5 of described armature 36 is upturned, the energy storage that is stretched of extension spring 5 simultaneously; When power failure or cut-off switch, in described coil block 4, do not have electric current to pass through, the magnetic field that it produces disappears, and described extension spring 5 is shunk, and one end away from described extension spring 5 of described armature 36 is upturned.
Referring to Figure 14, the middle part of button assembly described in the present embodiment 2 is provided with die cavity 21, in described die cavity 21, be hinged with tongue piece 22, the upper end of described tongue piece 22 is provided with the Access Division 220 of extending to a side of described armature 36, the side away from described armature 36 of described tongue piece 22 is provided with the portion that turns that drives described tongue piece to rotate, and is also provided with the location division to described tongue piece 22 location in described die cavity 21;
In the present embodiment, described in the portion of turning comprise the ramp 221 away from described armature 36 1 sides, the lower inclined plane 222 that is arranged on described tongue piece 22; And be arranged on described housing 1 inner side, coordinate respectively the convex platform 110, the lower convex platform 120 that drive with described ramp 221, lower inclined plane 222; When described tongue piece 22 moves downward to bottom position from described coil moving contact 32 and the firm contact position of described coil fixed contact 31, described lower convex platform 120 coordinates the described tongue piece 22 of driving to be rotated in the forward to the vertical projection of described Access Division 220 upper surface away from described armature 36 with described lower inclined plane 222; When described tongue piece 22 moves to described initial position by described bottom position, described convex platform 110 coordinates with described ramp 221, drives described tongue piece 22 reverse rotations to the vertical projection of described Access Division 220 to be positioned on the upper surface of described armature 36; The forward and reverse maximum anglec of rotation of described tongue piece 22 is limited in described location division.
In the present embodiment, described location division has the retainer spring 223 being vertically arranged under described tongue piece 22, the lower end of described retainer spring 223 is fixed on the bottom of described die cavity 21, the upper end of described retainer spring is against on described tongue piece 22, described tongue piece 22, when its jointed shaft 225 rotates forward or backwards, drives described retainer spring 223 to swing.The axial two sides of jointed shaft 225 of described tongue piece 22 are equipped with spacing block set 224, and described spacing block set 224 can certainly be only set on a side; Described spacing block set 224 is positioned at the limited impression 210 of described die cavity 21 inwalls; When described tongue piece 22 rotates forward or backwards, described retainer spring 223 take its lower end as fulcrum swing and energy storage or release can, described retainer spring 223 release can time from the lower end of described tongue piece 22, drive the corresponding wall close contact of described spacing block set 224 and described limited impression 210.
Referring to Fig. 4-5, during initial position, described Access Division 220 is positioned at described armature 36 tops, and the vertical projection of described Access Division 220 drops on the upper surface of described armature 36, now described retainer spring 223 is to upper right overturning angle, described tongue piece 22 is applied to the thrust being rotated counterclockwise, also be deboost, impel described spacing block set 224 to be against on a side internal face of described limited impression 210, now described tongue piece 22 reverse rotations are to maximum angle, and locate under the effect of described retainer spring 23.
While connecting circuit, press described button assembly 2, and then drive described tongue piece 22 to drive described armature 36 to rotate; Referring to Fig. 6-7, when described armature 36 rotation to described coil moving contacts 32 contact with described coil fixed contact 31, described in described coil block 4 generation magnetic field suctions, armature 36 moves downward, drive and keep described active contact 34 to contact with described main fixed contact 33, simultaneously described coil moving contact 32 also keeps close contact with described coil fixed contact 31 under the effect of described magnetic field force, referring to Fig. 8, now connect load circuit; When the described armature 36 of described coil block 4 absorption rotates, can there is a certain amount of strain because described armature 36 moves downward in described coil moving contact 32, this strain can make described armature 36 further move downward, and drive described active contact 34 to contact with described main fixed contact 33, and then turning circuit.Because the described active contact 34 in the present embodiment is also elastic component, after it contacts with described main fixed contact 33, can under the effect in magnetic field, also occur certain strain, with described main fixed contact 33 close contacts, improve conductive effect.
Circuit in electric tool is further pressed described button assembly 2 to bottom position, and described button assembly 2 is locked in to bottom position after connecting; Referring to Fig. 8-9, when described button assembly 2 is rigidly connected tactile position and is moved to bottom position by described coil moving contact 32 and described coil fixed contact 31, the lower inclined plane 221 of described tongue piece 22 can touch the lower convex platform 120 on housing 1 gradually, described lower convex platform 120 drives described tongue piece 22 to turn clockwise, also be rotated in the forward, and first compress described retainer spring 223, described retainer spring 223 cross in after, i.e. the oblique upper left corner.Retainer spring 223 described herein excessively in, refer to described retainer spring 223 be positioned at described tongue piece 22 under, now the decrement of described retainer spring 223 is in maximum, in maximum energy storage state.After in described retainer spring 223 mistakes, from the bottom of described tongue piece 22, promoting described tongue piece 22 is rotated in the forward, and be limited in the maximum forward anglec of rotation under the cooperation of described spacing block set 224 and described limited impression 210, referring to Fig. 9, the now upper end of described tongue piece 22 rotation departs from the upper surface of described armature 36 to the vertical projection of described Access Division 220.If now power-off suddenly, referring to Figure 10-11, the magnetic field that described coil block 4 produces disappears, and described armature 36 upwards resets under the effect of extension spring 5, and drives described active contact 34 and described main fixed contact 33 to keep released state.
Referring to Figure 12, when described button assembly 2 is upwards reset to initial position by bottom position, the ramp 221 of described tongue piece 22 can contact cooperation with the upper protruding block 110 of described housing 1 gradually, described upper protruding block 110 drives described tongue piece 22 to be rotated counterclockwise, and finally order about described tongue piece 22 and described retainer spring 223 returns to initial position, be also Fig. 4 state.
If the circuit of the electric tool of working is disconnected, first to remove the locking to described button assembly 2, then described button assembly 2 is upwards reset to initial position, drive described coil moving contact 32 separated with described coil fixed contact 31.
Referring to Figure 13, as the concrete structure with the switch of power-off protection function of the present utility model, in order to make above-mentioned switch disjunction rapid, be that button assembly 2 more easily drives described moving contact 32 to move up, in the present embodiment, described button assembly 2 is extended with boss 38 to the side near described coil moving contact 32, described boss 38 is positioned at described coil moving contact 32 belows, one side of the close described boss 38 of described coil moving contact 32 ends is provided with the extension 39 coordinating with described boss 38, described boss 38 coordinates with described coil moving contact 32 to be realized described coil moving contact 32 and moves up with described button assembly 2.
In the present embodiment, described active contact 34 and described coil moving contact 32 are riveted on respectively the relative both sides of described action contact frame 35, described armature 36 is riveted in the centre position of described action contact frame 35, and making described active contact 34, described coil moving contact 32, the substantially parallel setting of described armature 36, the contact of described coil moving contact 32, described active contact 34 is close to described button assembly 2.
Described coil block 4 comprises coil and supports the bracing frame of described coil, and described armature 36 is hinged on the side plate 41 away from described contact one side of support frame as described above.Above-mentioned articulated structure adopts following concrete structure, one end away from described coil block 4 of described armature 36 is provided with groove 360, the side plate 41 away from described button assembly 2 of described coil block 4 is provided with upwardly extending protruding 410, and described groove 360 is plugged into be realized described armature 36 on described protruding 410 and be articulated and connected with described coil block 4.
Referring to Figure 16-18, in the present embodiment, described locking device comprises along the direction of motion of described button assembly 2 and is slidably arranged in the connecting rod 71 between described housing 1 and described button assembly 2, extend to described button assembly 2 one sides the upper end of described connecting rod 71, and being provided with U-shaped opening, this open card is received in the undergauge section of described button assembly 2 upper ends settings; The lower end of described connecting rod 71 is hinged with cage knob 72, and described cage knob 72 is provided with lock dog 73, and the outside of described housing 1 is provided with locked groove 74, and described lock dog 73 rotates and snaps in described locked groove 74 to limit described button assembly 2 motions around jointed shaft; On connecting rod, be also provided with in addition the spring 75 that forces button assembly 2 to move up to initial position, the upper end of described spring 75 is against the high spot at connecting rod 71 middle parts, and its lower end is against on Switch main body; When button assembly 2 is positioned at bottom position, press cage knob 72 it is rotated around jointed shaft, and described lock dog 73 is snapped in described locked groove 74, now connecting rod 71 is locked, and button assembly 2 can not move up and down.
Referring to Figure 13, in the present embodiment, the below of described button assembly 2 is provided with and drives its push-button reset device moving upward, and described push-button reset device is back-moving spring 6, one end of described back-moving spring 6 is against the lower end of described button assembly 2, and its other end is against the bottom of described housing 1 inner chamber.Below described button assembly 2, back-moving spring is set, being convenient to described button assembly 2 can be moved upward to initial position from bottom position automatically, or described button assembly 2 is moved to initial position from bottom position.Certainly, also described push-button reset device can be set in other embodiments, as by as described in button assembly 2 while resetting, can directly manually button assembly 2 upwards be pulled up to initial position.
Referring to Figure 15, as another kind of execution mode of the present utility model, a side of the close described active contact 34 of described button assembly 2 is also provided with boss 38, and described boss 38 extends to the below of described active contact 34; The described boss 38 of described active contact 34 1 sides arrives coil moving contact 32 disjunction distances to the disjunction of active contact 34 apart from the described boss 38 that is slightly larger than described coil moving contact 32 1 sides.Boss 38 is set at this place is mainly in order to prevent that initiatively contact 34 and main fixed contact 33 are because Long contact time or other reason stick together cannot disjunction time, the boss 38 at this place is when being moved to initial position by bottom position with described button assembly 2, can initiatively promote initiatively contact 34 moves upward, realize and force disjunction, thereby further improve the breaking capacity of whole switch, guarantee Electrical Safety; Under normal circumstances, once the magnetic of coil block 4 disappears, initiatively contact 34 can be separated rapidly under the effect of extension spring 5 with main fixed contact 33, and then guarantee that switch can meet the requirement of the test of disjunction at a slow speed.
Above-mentioned embodiment is just explained in detail the technical solution of the utility model; the utility model has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; the above-mentioned principle of every foundation and the improvement of spirit on the utility model basis, substitute, all should be within protection range of the present utility model.
Claims (12)
1. a switch with power-off protection function, comprises housing (1); Button assembly (2), described button assembly (2) is slidably mounted on described housing (1) inside; Contact assembly (3), described contact assembly (3) comprises at least one group of coil fixed contact (31) for closing coil assembly (4), coil moving contact (32), and at least one group of main fixed contact (33), active contact (34) that is used for connecting load circuit;
It is characterized in that:
Described coil fixed contact (31), described main fixed contact (33) are fixedly installed on described housing (1) inside, it is upper that described coil moving contact (32), described active contact (34) are fixedly installed on action contact frame (35), and described coil moving contact (32) is flexible member; Distance between described coil moving contact (32) and described coil fixed contact (31) is less than the distance between described active contact (34) and described main fixed contact (33); On described action contact frame (35), be also fixed with armature (36), one end away from described contact assembly (3) contact of described armature (36) is articulated with on described coil block (4), the other end is realized and being moved up and down under the driving of described button assembly (2), and described armature (36) is provided with the armature resetting means that drives described armature (36) to reset; Described housing (1) outside is provided with for described button assembly (2) being locked in to the locking device of bottom position;
The middle part of described button assembly (2) is provided with die cavity (21), in described die cavity (21), be hinged with tongue piece (22), the upper end of described tongue piece (22) is provided with the Access Division (220) of extending to a side of described armature (36), the side of described tongue piece (22) is provided with the portion that turns that drives described tongue piece to rotate, and is also provided with the location division to described tongue piece (22) location in described die cavity (21);
While connecting circuit, described tongue piece (22) moves down with described button assembly (2), and drive described armature (36) to move downward, after described coil moving contact (32) first contacts with described coil fixed contact (31), described in described coil block (4) generation magnetic field suction, armature (36) moves downward, drive and keep described active contact (34) to contact with described main fixed contact (33), connecting load circuit; After circuit is connected, described button assembly (2) continues to move downward to bottom position, simultaneously, the portion of turning drives described tongue piece (22) to rotate around jointed shaft, and making the vertical projection of described Access Division (220) depart from the upper surface of described armature (36), described button assembly (2) is arranged on the locking device locking in described housing (1) outside; Now after power-off, described coil block (4) dead electricity, described armature (36) resets under the effect of armature resetting means, and drives described active contact (34) and described main fixed contact (33) to keep released state;
During open circuit, described locking device is removed the locking to described button assembly (2), described button assembly (2) moves up to initial position, and drive described coil moving contact (32) separated with described coil fixed contact (31), described in the portion of turning drive described tongue piece (22) rotation to the vertical projection that makes described Access Division (220) to be positioned at the upper surface of described armature (36).
2. a kind of switch with power-off protection function according to claim 1, is characterized in that: described in the portion of turning comprise the ramp (221) away from described armature (36) one sides, the lower inclined plane (222) that is molded over described tongue piece (22); And be arranged on described housing (1) inner side, coordinate respectively the convex platform (110), the lower convex platform (120) that drive with described ramp (221), lower inclined plane (222); Described tongue piece (22) has been when from described coil moving contact (32) and described coil fixed contact (31), just contact position has moved downward to bottom position, and described lower convex platform (120) coordinates with described lower inclined plane (222) and drives described tongue piece (22) to rotate the vertical projection of described Access Division (220) extremely away from the position of the upper surface of described armature (36); When described tongue piece (22) moves to described initial position by described bottom position, described convex platform (110) coordinates with described ramp (221), drives described tongue piece (22) rotation to the vertical projection of described Access Division (220), to be positioned at the position of the upper surface of described armature (36); The maximum anglec of rotation of described tongue piece (22) is limited in described location division.
3. a kind of switch with power-off protection function according to claim 2, it is characterized in that: described location division comprises the retainer spring (223) being vertically arranged under described tongue piece (22), the lower end abutment of described retainer spring (223) is in the bottom of described die cavity (21), and the upper end of described retainer spring is against on described tongue piece (22); The jointed shaft (225) of described tongue piece (22) has at least one side to be provided with spacing block set (224) in axial two sides, and described spacing block set (224) is positioned at the limited impression (210) of described die cavity (21) inwall; When described tongue piece (22) rotates forward or backwards, described retainer spring (223) take its lower end as fulcrum swing and energy storage or release can, described retainer spring (223) release can time from the lower end of described tongue piece (22), drive the corresponding wall close contact of described spacing block set (224) and described limited impression (210).
4. according to the arbitrary described a kind of switch with power-off protection function of claim 1-3; it is characterized in that: described button assembly (2) is extended with boss (38) to the side near described coil moving contact (32); described boss (38) is positioned at described coil moving contact (32) below; while driving described button assembly (2) to move up, described boss (38) coordinates with described coil moving contact (32) to be realized described coil moving contact (32) and moves up.
5. a kind of switch with power-off protection function according to claim 4, is characterized in that: a side of the close described boss (38) of described coil moving contact (32) end is provided with the extension (39) coordinating with described boss (38).
6. a kind of switch with power-off protection function according to claim 5; it is characterized in that: described active contact (34) and described coil moving contact (32) are riveted on respectively the relative both sides of described action contact frame (35), and described armature (36) is riveted in the centre position of described action contact frame (35).
7. a kind of switch with power-off protection function according to claim 6; it is characterized in that: described coil block (4) comprises coil and support the bracing frame of described coil, described armature (36) is hinged on the side plate (41) away from described contact one side of support frame as described above.
8. a kind of switch with power-off protection function according to claim 7; it is characterized in that: one end away from described coil block (4) of described armature (36) is provided with groove (360); the side plate away from described button assembly (2) of described coil block (4) (41) is provided with upwardly extending projection (410), and described groove (360) is plugged into be realized described armature (36) and be articulated and connected with described coil block (4) in described projection (410).
9. a kind of switch with power-off protection function according to claim 8; it is characterized in that: described armature resetting means is extension spring (5); one end of described extension spring (5) is articulated to the end away from described button assembly (2) of described armature (36); and described groove (360) is positioned between described extension spring (5) and described button assembly (2), the other end of described extension spring (5) is connected with the lower end of described coil component coil block (4).
10. a kind of switch with power-off protection function according to claim 9, it is characterized in that: described locking device comprises along the direction of motion of described button assembly (2) and is slidably arranged in the connecting rod (71) between described housing (1) and described button assembly (2), the upper end of described connecting rod (71) is connected with the upper end of described button assembly (2), the lower end of described connecting rod (71) is hinged with cage knob (72), described cage knob (72) is provided with lock dog (73), the outside of described housing (1) is provided with locked groove (74), described lock dog (73) rotates and snaps in described locked groove (74) to limit described button assembly (2) motion around jointed shaft.
11. a kind of switches with power-off protection function according to claim 10; it is characterized in that: the below of described button assembly (2) is provided with and drives its push-button reset device moving upward; described push-button reset device is back-moving spring (6); one end of described back-moving spring (6) is against the lower end of described button assembly (2), and its other end is against the bottom of described housing (1) inner chamber.
12. a kind of switches with power-off protection function according to claim 11, it is characterized in that: a side of the close described active contact (34) of described button assembly (2) is also provided with boss (38), and described boss (38) extends to the below of described active contact (34); The described boss (38) of described active contact (34) one sides is lower than the described boss (38) of described coil moving contact (32) one sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320710925.6U CN203521227U (en) | 2013-11-12 | 2013-11-12 | Switch with power-off protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320710925.6U CN203521227U (en) | 2013-11-12 | 2013-11-12 | Switch with power-off protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203521227U true CN203521227U (en) | 2014-04-02 |
Family
ID=50380118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320710925.6U Withdrawn - After Issue CN203521227U (en) | 2013-11-12 | 2013-11-12 | Switch with power-off protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203521227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560029A (en) * | 2013-11-12 | 2014-02-05 | 科都电气有限公司 | Switch with power-off protection function |
| CN109003411A (en) * | 2018-08-27 | 2018-12-14 | 佛山市高明毅力温控器有限公司 | A kind of fire prevention detecting alarm |
-
2013
- 2013-11-12 CN CN201320710925.6U patent/CN203521227U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560029A (en) * | 2013-11-12 | 2014-02-05 | 科都电气有限公司 | Switch with power-off protection function |
| CN103560029B (en) * | 2013-11-12 | 2015-07-22 | 科都电气有限公司 | Switch with power-off protection function |
| CN109003411A (en) * | 2018-08-27 | 2018-12-14 | 佛山市高明毅力温控器有限公司 | A kind of fire prevention detecting alarm |
| CN109003411B (en) * | 2018-08-27 | 2024-04-02 | 佛山市高明毅力温控器有限公司 | Fireproof detection alarm |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140402 Effective date of abandoning: 20150722 |
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| RGAV | Abandon patent right to avoid regrant |