CN217468223U - Dual outage device and toaster - Google Patents

Abstract

The utility model discloses a dual power-off device and a toaster, which belongs to food baking equipment, when a lifting frame of the prior toaster is clamped and can not be lifted, a power supply circuit of a load is difficult to be disconnected, and potential safety hazard of overtime work of the load exists; and the lifting member provides the actuating member with a power-off stroke moving from the first position to the second position when the actuating member is located at the first position. When the electromagnet releases the execution component, the lifting component and the execution component are reset, and a power supply circuit of a load is disconnected; if the lifting component is blocked, the executing component can still move the power-off stroke from the first position to the second position to disconnect the first circuit switch, so that the hidden danger that the load continues to work is eliminated, and the function of double power-off is realized.

Description

Dual outage device and toaster

Technical Field

The utility model belongs to food baking equipment, concretely relates to toaster, this kind of toaster relies on dual outage device can dual outage when the supply circuit of disconnection load, ensures reliable outage, avoids the long-time work of load.

Background

The Toaster, english name Toaster, is called automatic bread slice oven and bread roaster in China, and is an electric heating cooking utensil specially used for re-roasting sliced bread. By using the bread slice, the bread slice can be baked to be brown, the fragrance is stronger, the taste is better, and the appetite is promoted. Similarly, other food pieces such as steamed bread pieces can be baked.

The existing toaster is internally provided with a baking cavity, a lifting frame and a load for heating the baking cavity, and a circuit switch for switching on or off a load power supply circuit is also arranged, an electromagnet is arranged on the lifting frame, and the lifting frame comprises a bracket positioned in the baking cavity and a handle extending to the outside. When the bread baking device is powered on for use, the bread slice is placed on the bracket in the baking cavity, the handle is pressed downwards, the whole lifting frame is lowered and is attracted by the electromagnetic force of the electromagnet, the circuit switch is closed when the lifting frame is attracted by the electromagnetic force, the power supply circuit of the load is switched on, and the load works and heats. After the load works according to the gears, the electromagnet releases the lifting frame, the lifting frame lifts the bread slice by the bracket to take food, the lifting frame lifts and simultaneously disconnects a power supply circuit of the load, and the load stops heating.

Because load heating has potential safety hazard, especially when overtime work, the safety risk increases. In practical use, the lifting frame can not be lifted in case of being clamped, a power supply circuit of the load can not be disconnected, and the load can not stop heating, so that accidents can be caused. Therefore, how to disconnect the power supply circuit of the load when the lifting frame is blocked and can not be lifted and stop the heating of the load becomes the safety and functional requirement of the product.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model and the technical task who provides provide a dual power-off device and toaster to can also break off the supply circuit of load when the crane is blocked and can not rise, make the load stop heating, eliminate the potential safety hazard that the load continues to heat.

In order to achieve the above object, the utility model discloses a dual power-off device, characterized by includes:

a first circuit switch for turning on or off a power supply circuit of a load;

an actively configured actuating member having a range of motion including a first position closing the first circuit switch and a second position opening the first circuit switch;

a first reset member that provides a force to the actuating member that moves in a direction from the first position to the second position;

a lifting member configured to be lifted and lowered, and configured to press and hold the actuator member to move in a direction from the second position to the first position; when the actuating member is located at the first position, the lifting member provides the actuating member with a power-off stroke moving from the first position to the second position, and the power-off stroke is defined as that the actuating member opens the first circuit switch after moving from the first position to the second position;

a second restoring member that provides a lifting force to the lifting member;

an electromagnet configured to attract the actuating member in the first position with an electromagnetic force or to release the actuating member from the first position by eliminating the electromagnetic force.

The utility model discloses a dual outage device is pressed by the lifting means downstream and is held the direction activity of executive component from the second position to the primary importance to being inhaled the executive component at the primary importance by the electro-magnet, the executive component is closed first circuit switch at the primary importance, and the supply circuit of load is put through, load work. When the electromagnet eliminates the electromagnetic force to release the executing component from the first position, the executing component is movably reset from the first position to the second position under the action of the first resetting piece to release the lifting component, the first circuit switch is switched off, the power supply circuit of the load is switched off, and the load stops working. The lifting component is lifted and reset under the action of the second resetting piece.

In the prior art, when the electromagnet removes the electromagnetic force to release the actuating member from the first position, if the lifting member cannot be reset, the blocking actuating member is movably reset from the first position to the second position, so that the first circuit switch and the power supply circuit of the load cannot be disconnected, and the load cannot stop working, which causes a safety hazard.

The utility model discloses in, because the lift component provides the outage stroke from the direction activity of primary importance to the second place for the executive component when the executive component is located the primary importance, then the executive component still can follow the primary importance to the direction activity of second place this outage stroke in order to break off first circuit switch, the supply circuit of load is disconnected, and load stop work eliminates the hidden danger that the load continues work. Thus, the utility model discloses a dual power-off device has realized the function of dual outage.

In order to ensure the safety of electricity utilization, the power supply circuit comprises a live wire and a zero wire, and the first circuit switch comprises a live wire switch and a zero wire switch. The live and neutral conductors are thus switched on or off simultaneously by the live and neutral switches. When the device is specifically implemented, the live wire switch and the zero wire switch can be configured in a linkage mode or can be configured independently.

Particularly, the first circuit switch is a normally open switch, the actuating member is provided with a first switch closing part, when the actuating member is located at the first position, the first switch closing part triggers the first circuit switch to close the first circuit switch, and when the actuating member is located at the second position, the first switch closing part leaves the first circuit switch to open the first circuit switch. Therefore, the power supply circuit of the load can be kept in an open state, and the power supply circuit is closed and switched on only when the load needs to work, so that the power utilization safety is ensured.

Furthermore, in order to ensure the safety of electricity utilization, a second circuit switch connected in series with the first circuit switch is arranged in the power supply circuit, the second circuit switch is a normally open switch, a second switch closing part is arranged on the lifting member, when the executing member is located at the first position, the second switch closing part triggers the second circuit switch to close the second circuit switch, and when the executing member is located at the second position, the second switch closing part rises along with the lifting member and leaves the second circuit switch, so that the second circuit switch is opened. Therefore, under the normal state, the first circuit switch and the second circuit switch control the on-off of the power supply circuit at two positions of the power supply circuit, and the reliability of the off-circuit is improved.

Preferably, in order to operate stably and reliably and ensure accurate fitting, the actuating member is a swinging member and is configured to swing toward and away from the first circuit switch. Therefore, the movement mode and the direction of the actuating component are determined reliably, the tilting and the deviation are avoided during the swinging, and the actuating component can accurately reach the work position during the swinging. The actuating member is used for closing the first circuit switch when approaching the first circuit switch, and is used for opening the first circuit switch when being far away from the first circuit switch.

The executing component is provided with a first avoiding structure, the lifting component is provided with a second avoiding structure, and the first avoiding structure and the second avoiding structure are matched to provide a power-off stroke for the executing component to move from the first position to the second position. The structure is particularly suitable for the first circuit switch and the second circuit switch which are normally open switches of the same type and specification, and at the moment, the executing component can be kept to control the first circuit switch and the lifting component to control the second circuit switch to synchronously move and have basically the same moving stroke. If the first circuit switch and the second circuit switch are both microswitches, the microswitches have specified strokes, the switches are turned on and off through deformation of the elastic pieces, the deformation range of the elastic pieces is generally within 3mm, namely, in a natural disconnection state, the elastic pieces are turned on or turned off through deformation not larger than 3 mm. Therefore, the first avoidance structure and the second avoidance structure are matched to realize the power-off stroke, and the power-off stroke control device has the technical advantages of compact structure and sensitive control.

Furthermore, in order to keep the action synchronization of the first circuit switch controlled by the executing component and the action synchronization of the second circuit switch controlled by the lifting component and have basically the same action stroke, the structure is simplified, and the volume is reduced, wherein the first avoiding structure is a sliding block; the second avoidance structure is an inclined plane arranged on the lifting member, and the lifting member is also provided with a pressing part adjacent to the inclined plane; when the actuating member swings, the inclined surface and the pressing part change positions corresponding to the slide block, when the lifting member descends, the pressing part presses the slide block to enable the actuating member to swing from the second position to the first position, when the actuating member is located at the first position, the end part of the slide block corresponds to the inclined surface to provide a power-off stroke for the actuating member to swing from the first position to the second position, and when the actuating member swings in the power-off stroke, the inclined surface pushes the slide block to move. Based on the structure, when the actuating component and the lifting component act synchronously, the position relation of the sliding block, the inclined plane and the pressing and holding part is changed based on the swinging of the actuating component, and the double power-off is realized by the matching of the sliding block and the inclined plane or the pressing and holding part at different positions. The actuator is configured to swing about a swing axis in the lateral direction and the swing causes a change in a projected position of the slider on a horizontal plane, the slider is configured to slide in a direction parallel to the swing axis of the actuator, and the slider is urged by an elastic element in a direction approaching the inclined surface and the pressure holding portion.

The executing component is provided with a constraint hole, and the sliding block is positioned in the constraint hole, so that the sliding block is constrained in a proper moving range, and the sliding block is accurately matched with the inclined plane and the pressing part when swinging along with the executing component.

The executing component is provided with a hook, the hook hooks the lifting component to prevent the lifting component from rising when the executing component is located at the first position, and the hook deviates from the lifting component to allow the lifting component to rise when the executing component swings from the first position to the second position. Also, the lifting member is overlapped with the actuating member when the hook hooks the lifting member. Or when the hook hooks the lifting member, the height difference which is not smaller than the power-off stroke is kept between the lifting member and the executing member, and when the electromagnet releases the executing member from the first position, the height difference enables the executing member to move the power-off stroke from the first position to the second position.

Preferably, the first return member is a torsion spring acting on the actuating member.

Preferably, the electromagnet and the first circuit switch are assembled on a bottom plate, a support is arranged on the bottom plate, and the executing component is assembled on the support in a swinging mode through a pin shaft.

Preferably, the lifting member is sleeved on a guide rod, and the second restoring piece is an extension spring connected to the lifting member. In particular, the guide rod is sleeved with a compression spring, the compression spring is positioned at the upper side of the lifting component and applies downward elastic resistance to the lifting component in the lifting stroke of the lifting component, and when the lifting component is lifted and reset under the action of the second reset piece, the compression spring can buffer the impact of the lifting component.

In order to control the lifting member, the working position of the lifting member is changed timely, the lifting member is restrained by the restrained piece of the lifting member and cannot rise when the actuating member is located at the first position, and the restrained piece of the lifting member is released to enable the lifting member to rise when the actuating member moves from the first position to the second position.

In order to achieve the above purpose, the toaster of the present invention is characterized by performing the dual power-off method of the present invention.

In order to achieve the above object, the utility model discloses a toaster, which comprises an outer shell, be equipped with the open baking chamber in upper end in the shell, do baking chamber configuration crane and the load that is used for the heating, characterized by: dispose in the shell the utility model discloses a dual outage device, the shell is equipped with the lift passageway, the crane include with bracket and handle that the lift component is connected, the bracket is located toast the chamber, the handle warp the lift passageway extends outside the shell, the electro-magnet is controlled by the controller and is used for with executive component inhales first position is with the switch-on supply circuit will according to the settlement condition executive component follows first position release is with the disconnection supply circuit. The toaster realizes the double power-off function by the double power-off device.

Preferably, the setting condition is at least one time step set by a timer. The utility model discloses an execute the outage action when the power supply circuit of switch-on load:

the power supply circuit for switching on the load is characterized in that the actuating component is attracted to a first position by an electromagnet, and the actuating component closes a first circuit switch at the first position;

the power-off action is any one of the following two actions:

(1) when the electromagnet releases the executing component from the first position, the lifting component rises, and the executing component moves from the first position to the second position to disconnect the first circuit switch;

(2) when the electromagnet releases the actuating component from the first position, the lifting component is blocked from rising, and the actuating component moves a power-off stroke relative to the lifting component with blocked rising from the first position to the second position so as to disconnect the first circuit switch;

the first position is a position where the actuating member closes the first circuit switch, and the second position is a position where the actuating member opens the first circuit switch.

Therefore, the function of double power-off is realized, the power supply circuit of the load is ensured to be disconnected, the load stops working, and the hidden trouble of overtime working of the load is eliminated.

The utility model discloses a dual outage method is when the supply circuit of switch-on load arbitrary outage action of execution: (1) when the electromagnet releases the executing component from the first position, the lifting component rises, and the executing component moves from the first position to the second position to disconnect the first circuit switch; (2) when the electromagnet releases the actuating member from the first position, the lifting member is blocked from lifting, and the actuating member moves relative to the lifting member with blocked lifting from the first position to the second position by a power-off stroke to disconnect the first circuit switch. The power supply circuit realizes the function of double power-off, ensures that the power supply circuit of the load is disconnected, stops the load from working, and eliminates the hidden trouble of overtime work of the load.

The utility model discloses an execution component and the lift component of mutually supporting to be equipped with the electro-magnet and constitute dual power-off device, this dual power-off device can be according to the utility model discloses a dual outage method action realizes dual outage worker function.

The utility model discloses a dual outage method and dual outage device all can be applied to the toaster, realize the dual outage worker function of toaster.

Drawings

FIG. 1 is a perspective view of a toaster according to the present invention;

FIG. 2 is a schematic view of the toaster of FIG. 1 with an outer cover removed;

fig. 3 is a schematic view of the dual power-off device of the present invention cooperating with the lifting frame;

FIG. 4 is a schematic view of the crane of FIG. 3 after it has been raised;

fig. 5 is a schematic diagram of the dual power cutoff device of the present invention in a power-on circuit;

FIG. 6 is a schematic view of another perspective of the structure shown in FIG. 5;

FIG. 7 is a schematic view of the actuator of FIG. 6 with the actuator removed;

FIG. 8 is an enlarged view of portion A of FIG. 7;

fig. 9 is a schematic diagram of the dual power cutoff device of the present invention in a disconnected power supply circuit;

FIG. 10 is a schematic view of the actuator shown in FIG. 9 with the actuator removed;

FIG. 11 is a schematic view from another perspective of the structure shown in FIG. 10;

FIG. 12 is an enlarged view of the portion B of FIG. 11;

fig. 13 is a schematic view of the position relationship between the slide block and the inclined plane and the pressing portion when the actuating member of the present invention is located at the first position;

fig. 14 is a schematic view of the position relationship between the slide block, the inclined plane and the pressing portion after the lifting member leaves the first position along with the actuating member according to the present invention;

fig. 15 is a schematic diagram of a load power supply circuit of the present invention;

the reference numbers in the figures illustrate:

100 shell, 101 lifting channel;

200 of inner container;

300 a base;

400 a baking cavity;

500, lifting frame: 501 bracket, 502 handle;

600 load;

710 live, 720 neutral;

800 double power-off device:

810 a first circuit switch, 811 a hot switch, 812 a neutral switch, 813 a first contact, 814 a spring, 815 a second contact,

820 actuating member, 821 first switch closing part, 822 first avoiding structure, 823 restraining hole, 824 hook, 825 elastic element, 826 pin shaft

830 of a first reset device and a second reset device,

840 lifting member, 841 second switch closing part, 842 second avoiding structure, 843 pressing part, 845 guiding rod, 846 compressing spring,

850 a second restoring member, which is provided with a second restoring member,

860 an electromagnet, and a power supply unit,

870 the second circuit switch to be switched on and off,

880 bottom plate, 881 stand;

900 knob switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the accompanying drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention are intended to cover a non-exclusive inclusion, such that a method or article of manufacture that comprises a list of features is not necessarily limited to those features expressly listed, but may include other features not expressly listed that may be included in the method or article of manufacture.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The vertical direction is consistent with the directions of 'up' and 'down', the directions of 'up' and 'down' are opposite, the directions of 'left' and 'right' are opposite, and the directions of 'front' and 'rear' are opposite.

In the description of the present invention, it should be understood that the technical features defined by the terms "first", "second", etc. have sequential concepts, and the defined technical features are only clearly distinguished from other technical features for clearly describing the defined technical features, but do not represent such naming in actual implementation, and therefore, cannot be construed as limiting the present invention.

The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

The toaster shown in fig. 1-2 comprises a casing 100, an inner container 200, and a base 300, wherein the inner container 200 is located in the casing 100, and the casing 100 and the inner container 200 are located on the base 300 and kept assembled with the base. A baking chamber 400 with an open upper end is arranged in the inner container 200, and the baking chamber 400 is also positioned in the outer shell 100. The oven cavity 400 is provided with a crane 500 and a load 600 for heating. To facilitate assembly, the crane 500 is an assembled structure. The load 600 is a heating resistor distributed on the sidewall of the baking chamber, and is used for all-around baking of the bread slice in the baking chamber. The casing 100 and the inner container 200 are provided with a lifting passage, which is a slit extending vertically. The crane 500 comprises a lifting member 840, a bracket 501 connected with the lifting member and a handle 502. The elevating member 840 is positioned in an interlayer between the front side of the inner container 200 and the outer case 100. The bracket 501 is located in the baking chamber 400 and connected with the lifting member through the lifting channel of the inner container. The handle 502 extends out of the housing through the hoistway 101 of the housing. A double power-off device 800 is disposed at the bottom of the interlayer between the front side of the inner container and the outer case.

As shown in fig. 3 to 15, the double power cutoff device 800 includes: a first circuit switch 810, a second circuit switch 870, an actuating member 820, a first reset piece 830, a lifting member 840, a second reset piece 850, an electromagnet 860 and a bottom plate 880.

The bottom plate 880 is a flat plate, on which the bracket 881 is assembled, and the bottom plate is fixedly assembled on the base to configure the whole dual power-off device on the toaster.

A first circuit switch 810 is mounted to the backplane 880 for switching on or off a power supply circuit of the load 600 shown in fig. 15, the power supply circuit including a live switch 810 and a neutral switch 720, the first circuit switch 810 including a live switch 811 and a neutral switch 812. And the live wire switch and the zero wire switch are both normally-open micro switches. As shown in fig. 10, the micro switch has a first contact 813 fixed on the bottom plate 880 and a second contact 815 provided on the spring plate 814, and the first contact and the second contact are not contacted to disconnect the circuit in a normal state. The second contact can contact the first contact to connect the circuit through the downward elastic deformation of the elastic sheet.

A second circuit switch 870 is also mounted to the backplane 880 and is in series with the first circuit switch, specifically in the hot line with the hot switch as shown in fig. 15. The second circuit switch is also a normally open microswitch and has the same structure as the live wire switch.

The actuating member 820 is generally in the form of a plate, which is a swinging member and is swingably mounted to the bracket 881 via a pin 826 extending in the left-right direction, and is configured to swing toward and away from the first circuit switch. The actuator 820 is provided with a first switch closing part 821 for closing or opening the first circuit switch. As shown, the first switch closing part 821 corresponds to the first switch, and the lower ends of the two posts are respectively directed to the elastic pieces of the live wire switch and the neutral wire switch one by one. The movable range of the actuating member includes a first position where the first circuit switch is closed and a second position where the first circuit switch is opened, along with the swing of the actuating member. When the actuating member 820 is located at the first position as shown in fig. 5-8 and 13, the first switch closing part 821 triggers the first circuit switch 810 to close the first circuit switch, and when the actuating member 820 is located at the second position as shown in fig. 9-12 and 14, the first switch closing part 821 is separated from the first circuit switch to open the first circuit switch.

The end (i.e., the front end) of the actuating member 820 far away from the pin shaft fixes the magnetic attraction body.

The upper side of the actuating member 820 is provided with a first avoidance structure 822, which is a slider. Specifically, the upper side of the actuating member 820 is provided with a constraint hole 823, and the slider 822 is located in the constraint hole 823 and can slide along a direction parallel to the axis of the pin shaft, that is, can slide left and right. The slider is urged rightward by a helical compression spring as the elastic member 825. In fig. 8, the left end of the slide block has a larger profile, so that the slide block can be prevented from being removed from the constraining hole to the right. As shown in fig. 13-14, the projected position of the slider on the horizontal plane changes as the slider oscillates with the actuator.

The actuating member 820 is also provided with a hook 824 at an upper side thereof.

The first reset member 830 is a torsion spring, the middle portion of the torsion spring is sleeved on the pin 826, and both ends of the torsion spring are respectively supported on the actuating member 820 and the bracket 881, so as to provide a force for the actuating member to move in a direction from the first position to the second position. In other words, the elastic force is applied to the actuating member to make the actuating member swing upwards.

The lifting member 840 is a constituent of a lifting frame. The elevating member 840 is fitted over a guide rod 845 which is adapted to be elevated along the elevating member, and the guide rod is fitted over a compression spring 846, the compression spring 846 being located at an upper side of the elevating member 840 and applying a downward elastic resistance to the elevating member during an elevating stroke of the elevating member.

In the positional relationship, the elevating member 840 is configured to swing the pressing and holding member 820 from the second position toward the first position when descending; when the actuating member 82 is located at the first position, the actuating member restrains the lifting member to prevent the lifting member from ascending, and the lifting member provides the actuating member with a power-off stroke moving from the first position to the second position, wherein the power-off stroke is defined as that the actuating member opens the first circuit switch after moving from the first position to the second position; the actuating member releases the lifting member when the actuating member moves in a direction from the first position to the second position.

Wherein the actuator restrains the lifting member from rising when the actuator is in the first position is achieved by the hook 824 hooking the lifting member 840 to prevent the lifting member from rising. In the illustrated embodiment, the lifting member is overlapped with the actuating member while the hook hooks the lifting member. The lifting member is released by the actuating member when the actuating member moves from the first position to the second position, and the hook 824 is deviated from the lifting member 840 to lift the lifting member when the actuating member 820 swings from the first position to the second position.

The elevation member 840 is provided with a second switch closing part 841, the second switch closing part 841 is in the form of a pillar like the first switch closing part and a lower end of the pillar is directed to a spring plate of the second circuit switch 870. When the actuating member 820 is located at the first position shown in fig. 5-8 and 13, the second switch closing portion triggers the second circuit switch to close the second circuit switch, and when the actuating member is located at the second position shown in fig. 9-12 and 14, the second switch closing portion ascends along with the lifting member and leaves the second circuit switch to open the second circuit switch.

The lifting member 840 is provided with a second avoidance structure 842, which is an inclined surface arranged on the lifting member. The inclined direction of the inclined plane is configured to be that the lower end of the inclined plane is far away from the sliding block and the upper end of the inclined plane is close to the sliding block on the projection of a horizontal plane. The lifting member is further provided with a pressing portion 843 juxtaposed to the inclined surface.

The slider changes the position corresponding to the inclined surface and the pressure holding portion when the actuator 820 swings. As shown in fig. 9-12 and 14, when the lifting member descends, the pressing portion 843 presses and holds the slider to swing the actuating member from the second position to the first position, when the actuating member is located at the first position as shown in fig. 5-8 and 13, the end portion of the slider corresponds to the inclined surface to provide a power-off stroke for the actuating member to swing from the first position to the second position, and when the actuating member swings in the power-off stroke, the inclined surface pushes the slider to move leftward. Thus, the first avoidance structure and the second avoidance structure cooperate to provide the actuating member with a de-energizing stroke that is movable in a direction from the first position to the second position.

The second restoring member 850 is an extension spring connected to the elevating member, and specifically, the lower end of the extension spring is connected to the elevating member 840, and the upper end of the extension spring is connected to the outer wall of the inner container 200. The second restoring member provides a lifting force to the lifting member.

The electromagnet 860 is fixed to the base 880, and generates an electromagnetic force when the electromagnet is energized and disappears when the electromagnet is de-energized. Thus, the position of the electromagnet is configured to attract the actuating member with an electromagnetic force in the first position or to release the actuating member from the first position when the electromagnetic force is removed.

In particular, the electromagnet is controlled by the controller to attract the actuating member in the first position to close the power supply circuit and to release the actuating member from the first position to open the power supply circuit according to the set conditions. Furthermore, the setting condition is at least one time shift set by a timer, and the time shift can be configured as a knob switch or a plurality of keys for setting the shift by a user. When the power is supplied, once the actuating component approaches the electromagnet, the electromagnet attracts the actuating component and keeps the actuating component at the first position, and a power supply circuit of the load is switched on to enable the load to work. When the load works according to the time corresponding to the set gear, the electromagnet is powered off, and the executing component is released, so that the power supply circuit of the load is disconnected, and the load stops working.

In view of the above-described dual power cutoff device and the toaster, the crane 500 and the actuator 820 are located at their respective high positions during standby, and the power supply circuit of the load is disconnected.

During operation, the bread slice is placed on the bracket in the baking cavity, the handle is pressed downwards, the lifting frame descends, and the bread slice is lowered to the baking cavity. During the descending process of the lifting frame, particularly when the lifting component of the lifting frame descends to the lower position shown in figures 9-12 and 14, the pressing and holding part 843 presses the sliding block to enable the executing component to swing downwards until the executing component is attracted by the electromagnetic force of the electromagnet and is kept at the first position shown in figures 5-8 and 13. In fig. 1, the direction of movement of the handle is shown by an arrow and a further position of the handle is shown by a broken line.

When the executing member 820 is located at the first position, the first circuit switch and the second circuit switch are both closed and connected to the circuit, the power supply circuit of the load is closed, and the load works. The pressure holding portion is offset from the slider as shown in fig. 8 and 13, and the inclined surface faces the slider.

And when the actuating member is at the first position, the hook 824 hooks the elevating member 840 to prevent the elevating member from rising, so as to keep the bread slice in the toasting cavity for toasting.

When the load works according to the preset time corresponding to the selected gear, the electromagnet is powered off, the electromagnetic force disappears, the executing component swings upwards under the action of the elastic force of the first resetting piece, the lifting component slides upwards along the guide rod under the action of the elastic force of the second resetting piece, the hook 824 deviates from the lifting component 840, the first circuit switch and the second circuit switch are both disconnected from the circuit where the first circuit switch and the second circuit switch are located, the power supply circuit of the load is disconnected, and the load stops working.

When the electromagnet is powered off and the lifting frame is blocked and cannot lift, as shown in fig. 8, the inclined plane faces the sliding block, the executing component swings upwards under the action of the elastic force of the first resetting piece, the sliding block is pushed by the inclined plane to move leftwards, the executing component can swing upwards by a certain amplitude, the swing amplitude is not less than the power-off stroke, and even if the second circuit switch is in a closed state, the first circuit switch disconnects a power supply circuit of the load, so that the load stops working. Thereby implementing a dual power-off function.

As described above, the core of the present invention is that if the lifting member cannot be lifted after the electromagnet is powered off, the lifting member provides an upward moving power-off stroke for the actuating member, so that the first circuit switch can be disconnected from the power supply circuit of the load.

Therefore, the utility model provides a following dual outage method: namely, the power-off action is executed when the power supply circuit of the load is switched on:

the power supply circuit for switching on the load is characterized in that the actuating component is attracted to the first position by an electromagnet, and the actuating component switches the first circuit on and off at the first position and restrains the lifting component to prevent the lifting component from ascending;

the power-off action is any one of the following two actions:

(1) when the electromagnet releases the executing component from the first position, the lifting component rises, and the executing component moves from the first position to the second position to disconnect the first circuit switch;

(2) when the electromagnet releases the actuating component from the first position, the lifting component is blocked from rising, and the actuating component moves a power-off stroke relative to the lifting component with blocked rising from the first position to the second position so as to disconnect the first circuit switch;

the first position is a position where the actuating member closes the first circuit switch, and the second position is a position where the actuating member opens the first circuit switch.

The dual power-off method of the utility model is applied to the toaster, so that the toaster executes the dual power-off method, namely, the dual power-off function of the toaster is realized.

In the foregoing embodiment, when the power supply circuit of the load is turned on, the lifting member and the actuating member are stacked together, that is, the lifting member and the actuating member are maintained in a position state of substantially contacting each other, and when the actuating member is attracted by the electromagnet, the lifting member does not perform a lifting action, and the second circuit switch is also closed. The power-off stroke of the executing component is realized by the matching of the slide block and the inclined plane.

In other implementations, the de-energizing stroke of the actuating member may also be achieved by the following mating structures: when the hook hooks the lifting component, the height difference which is not less than the power-off stroke is kept between the lifting component and the executing component, and when the electromagnet releases the executing component from the first position, the height difference enables the executing component to move in the direction from the first position to the second position for the power-off stroke. In contrast to the illustrated construction, in which the hook is raised, when the actuating member is attracted by the electromagnet, the first circuit switch is closed, and the lever handle is released, the lifting member is first returned by a lifting return stroke which is not less than the power-off stroke, and then the lifting member is hooked by the hook. When the electromagnet releases the executing component and the ascending component is blocked and can not ascend and reset, the executing component can still swing upwards to execute a power-off stroke and disconnect the first circuit switch and a power supply circuit of the load. Wherein, the lifting component has a lifting reset action after the actuating component is sucked by the electromagnet, so that the second circuit switch can be disconnected. In order to avoid the disconnection of the second circuit switch when the circuit needs to be switched on, the elastic deformation capacity of the elastic sheet of the second circuit switch can be increased, the elastic range of the elastic sheet for switching on the second circuit switch is enlarged, and the second circuit switch is still closed after the lifting member is lifted and reset. Alternatively, the second circuit switch is omitted and the line at the second circuit switch is kept in an on state.

In the case of a toaster, when the circuit is turned on and the load is operating, the load heats the bread slice, and therefore the crane should be in a lower position to hold the bread slice in the toasting chamber by the carriage. In order to hold the bread slice in the toasting cavity by the bracket, the illustrated structure illustrates that the lifting member is hooked by the hook as a restraining member to restrain the lifting member from rising when the actuating member is located at the first position. The hook has a simple structure and is suitable for saving the manufacturing cost. In particular, in order to keep the bread slice in the baking cavity by the bracket, other structures can be adopted, such as a measure that the execution component is sucked by the electromagnet: when the actuating component is located at the first position, the lifting component is attracted by the electromagnet serving as the restraint piece and cannot rise, and when the actuating component moves from the first position to the second position, the lifting component is released by the electromagnet serving as the restraint piece, so that the lifting component rises. When the actuating member moves from the first position to the second position, the lifting member is released and synchronously lifted to reset, and the bracket lifts the bread slice for eating. The electromagnet for attracting the lifting member may be shared with the actuator or may be separately provided.

Claims (19)

1. Dual outage device, characterized by includes:

a first circuit switch (810) for switching on or off a power supply circuit of the load (600);

an actively configured actuating member (820) having a range of motion including a first position closing the first circuit switch (810) and a second position opening the first circuit switch;

a first reset (830) that provides a force to the actuating member (820) that is movable in a direction from the first position to the second position;

a lifting member (840) configured to be raised and lowered while pressing the actuating member (820) from the second position to the first position; the lifting member provides the actuating member with a power-off stroke moving from the first position to the second position when the actuating member (820) is in the first position, and the power-off stroke is defined as that the actuating member opens the first circuit switch after moving from the first position to the second position;

a second restoring member (850) providing a lifting force to the lifting member;

an electromagnet (860) configured to attract the actuating member in the first position with an electromagnetic force or to release the actuating member from the first position by eliminating the electromagnetic force.

2. The dual power cutoff device of claim 1, wherein: the power supply circuit comprises a live wire (710) and a neutral wire (720), and the first circuit switch comprises a live wire switch (811) and a neutral wire switch (812).

3. The dual power cutoff device according to claim 1 or 2, wherein: the first circuit switch is a normally open switch, a first switch closing part (821) is arranged on the execution component, when the execution component (820) is located at the first position, the first switch closing part (821) triggers the first circuit switch (810) to close the first circuit switch, and when the execution component is located at the second position, the first switch closing part leaves the first circuit switch to open the first circuit switch.

4. A dual power disconnect device as defined in claim 3, wherein: a second circuit switch (870) connected with the first circuit switch in series is arranged in the power supply circuit, the second circuit switch is a normally open switch, a second switch closing part (841) is arranged on the lifting member (840), when the execution member is located at the first position, the second switch closing part (841) triggers the second circuit switch (870) to close the second circuit switch, and when the execution member is located at the second position, the second switch closing part rises along with the lifting member and leaves the second circuit switch, so that the second circuit switch is opened.

5. The dual power cutoff device of claim 1, wherein: the actuating member (820) is a pendulum and is configured to swing toward and away from the first circuit switch.

6. The dual power cutoff device of claim 5, wherein: the power-off mechanism is characterized in that a first avoiding structure (822) is arranged on the executing component (820), a second avoiding structure (842) is arranged on the lifting component (840), and the first avoiding structure and the second avoiding structure are matched to provide a power-off stroke for the executing component to move from the first position to the second position.

7. The dual power cutoff device of claim 6, wherein:

the first avoidance structure (822) is a sliding block;

the second avoidance structure (842) is an inclined plane arranged on the lifting member, and the lifting member is also provided with a pressing part (843) which is parallel to the inclined plane;

when the executing component (820) swings, the slide block changes the corresponding position of the inclined surface and the pressing part, when the lifting component (840) descends, the pressing part (843) presses the slide block to enable the executing component to swing from the second position to the first position, when the executing component is located at the first position, the end part of the slide block corresponds to the inclined surface to provide a power-off stroke for the executing component to swing from the first position to the second position, and when the executing component swings in the power-off stroke, the inclined surface pushes the slide block to move.

8. The dual power cutoff device of claim 7, wherein: the actuating member (820) is configured to swing about a swing axis in a lateral direction and the swing causes a change in a projected position of the slider on a horizontal plane, a sliding direction of the slider is configured to be parallel to the swing axis of the actuating member, and the slider is urged by an elastic element (825) in a direction approaching the inclined surface and the pressure-holding portion.

9. The dual power cutoff device of claim 8, wherein: and the executing component (820) is provided with a constraint hole (823), and the sliding block is positioned in the constraint hole.

10. The dual power cutoff device of claim 5, wherein: the executing component (820) is provided with a hook (824), when the executing component is located at the first position, the hook (824) hooks the lifting component (840) to prevent the lifting component from rising, and when the executing component (820) swings from the first position to the second position, the hook (824) deviates from the lifting component (840) to allow the lifting component to rise.

11. The dual power cutoff device of claim 10, wherein: the lifting member (840) is overlapped with the performing member when the hook (824) hooks the lifting member (840).

12. A dual power disconnect device as defined in claim 10, wherein: when the hook hooks the lifting component, the height difference which is not smaller than the power-off stroke is kept between the lifting component and the executing component, and when the electromagnet releases the executing component from the first position, the height difference enables the executing component to move the power-off stroke from the first position to the second position.

13. The dual power cutoff device of claim 5, wherein: the first reset member (830) is a torsion spring acting on the actuating member.

14. The dual power cutoff device of claim 5, wherein: the electromagnet (860) and the first circuit switch (810) are assembled on a bottom plate (880), a support (881) is arranged on the bottom plate (880), and the execution component is assembled on the support (881) through a pin shaft (826) in a swinging mode.

15. The dual power cutoff device of claim 1, wherein: the lifting member (840) is sleeved on a guide rod (845), and the second resetting piece (850) is an extension spring connected to the lifting member.

16. The dual power cutoff device of claim 15, wherein: the guide rod (845) is sleeved with a compression spring (846) which is positioned at the upper side of the lifting member (840) and applies downward elastic resistance to the lifting member in the lifting stroke of the lifting member.

17. The dual power cutoff device of claim 1, wherein: when the actuating member (820) is located at the first position, the lifting member (840) cannot be lifted by the constrained part, and when the actuating member (820) moves from the first position to the second position, the lifting member (840) is released by the constrained part and is lifted by the lifting member.

18. Toaster, including shell (100), be equipped with the open chamber of toasting in upper end (400) in the shell, for toast chamber configuration crane (500) and be used for load (600) of heating, characterized by: the double power-off device (800) as claimed in any one of claims 1 to 17 is disposed in the housing (100), the housing (100) is provided with a lifting channel (101), the lifting frame (500) comprises a bracket (501) and a handle (502) connected with the lifting member (840), the bracket (501) is located in the baking chamber (400), the handle (502) extends out of the housing (100) through the lifting channel (101), and the electromagnet (860) is controlled by a controller to suck the actuating member at the first position to switch on the power supply circuit and release the actuating member from the first position according to a set condition to switch off the power supply circuit.

19. The toaster as set forth in claim 18 wherein: the setting condition is at least one time step set by a timer.

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