A toaster

Abstract

The embodiment of the present invention provides a toaster, which includes: a shell, a furnace component, a sliding frame, a reset member, a first switch, a second switch, a third switch, an electromagnet and a circuit board, wherein the furnace component is arranged in the shell; the sliding frame is slidably arranged in the shell, and a magnetic suction member is arranged on the sliding frame; the reset member is used to apply a reset elastic force to the sliding frame; the first switch and the second switch are both arranged at positions corresponding to the sliding frame in the shell, the first switch and the second switch are connected in series with the furnace component and form a loop, the first switch is a normally open switch, and the second switch is a normally closed switch; the third switch is connected in parallel with the second switch; the electromagnet is arranged at a position corresponding to the magnetic suction member in the shell; and the circuit board is electrically connected to the third switch and the electromagnet respectively. The toaster of the embodiment of the present invention can still cut off the power supply of the furnace component when the sliding frame cannot be reset due to a fault, thereby providing secondary protection for the toaster, having high safety and low production cost.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of household appliances, and in particular to a toaster. Background Art

[0002] Toaster, commonly known as automatic bread slice oven, bread toasting machine, is an electric cooker specially used for re-toasting sliced ​​bread. Using it, not only can the bread slices be toasted to a brown color, but also the aroma and taste can be stronger and the appetite can be improved. With the change of users' living habits and the improvement of living standards, toasters are becoming more and more popular among users.

[0003] The oven cavity of a toaster is usually provided with a sliding frame that can slide up and down. After the food to be baked is placed in the oven cavity, the sliding frame slides into the bottom of the oven cavity in a vertical direction and triggers a switch component to turn on the oven cavity, thereby heating the food. After the preset heating time is reached, the controller controls the sliding frame to pop up, thereby cutting off the heating circuit. For example, a Chinese invention patent with authorization announcement number CN205849313U discloses a toaster, which includes a furnace body and a plurality of bread slots opened in the furnace body, a heating plate assembly is provided in the bread slot, a controller for adjusting the power-on time of each heating plate assembly is provided in the circuit system, and a relay or switch unit is provided in the controller. However, this type of toaster is prone to the heating circuit being unable to be cut off due to the jamming of the sliding frame, which poses a safety hazard and has a high production cost. Summary of the invention

[0004] In view of the above problems existing in the prior art, an embodiment of the present invention provides a toaster with higher safety and lower production cost.

[0005] To solve the above problems, the technical solution provided by the embodiment of the present invention is:

[0006] A toaster, comprising:

[0007] case;

[0008] A furnace component, which is arranged in the shell, and has at least one heating tank for heating food;

[0009] A sliding frame, which is slidably disposed in the housing, and a magnetic attraction member is disposed on the sliding frame;

[0010] A reset member, used for applying a reset elastic force to the sliding frame;

[0011] A first switch and a second switch, both of which are arranged at positions corresponding to the sliding frame in the housing, the first switch and the second switch are connected in series with the furnace component to form a loop, the first switch is a normally open switch, and the second switch is a normally closed switch;

[0012] a third switch connected in parallel with the second switch;

[0013] An electromagnet, which is arranged in the housing at a position corresponding to the magnetic attraction member;

[0014] a circuit board, which is electrically connected to the third switch and the electromagnet respectively;

[0015] Wherein, when the sliding frame slides to the first position, the first switch is triggered, the furnace component is powered on, and the circuit board sends a first signal and a second signal to the third switch and the electromagnet respectively, so that the third switch is closed, the electromagnet is powered on and attracts the magnetic attraction member; when the sliding frame continues to slide to the second position, the first switch is kept triggered and the second switch is triggered, so that the second switch is disconnected;

[0016] When the furnace component is heated to a preset time, the circuit board sends a third signal and a fourth signal to the third switch and the electromagnet respectively, the third switch is turned off, the furnace component and the electromagnet are powered off, the sliding frame is reset to the initial position, the first switch is turned off, and the second switch is closed. When the sliding frame of the toaster is stuck due to a fault, the furnace component can still be powered off, providing secondary protection for the toaster, improving the safety of the toaster, having a low production cost, and being easy to promote and apply.

[0017] In some embodiments, the furnace assembly includes a first heating unit and a second heating unit connected in series, the circuit board is connected in series with the first heating unit and in parallel with the second heating unit, and when the furnace assembly is powered on, the voltage across the circuit board matches the voltage across the second heating unit. By adjusting the resistance of the first heating unit and the second heating unit, the voltage across the second heating unit can be adjusted to match the power supply voltage of the circuit board, thereby supplying power to the circuit board, eliminating a dedicated voltage conversion circuit, which is beneficial to simplifying the circuit structure of the toaster and can further reduce production costs.

[0018] In some embodiments, when the circuit board receives the fifth signal sent by the fourth switch, the circuit board sends the third signal and the fourth signal to the third switch and the electromagnet respectively. The toaster can automatically control the heating time and can also pause the heating according to the manual control of the user, which can improve the controllability of the toaster and thus improve the user experience.

[0019] In some embodiments, the first switch is a double-on double-off switch. The double-on double-off switch can cut off the live wire and the neutral wire at the same time, and has high safety.

[0020] In some embodiments, the second switch is a travel switch, which has sensitive control, reliable operation and long service life.

[0021] In some embodiments, the third switch is a magnetically controlled switch, which has fast action, stable operation, long service life and small size.

[0022] In some embodiments, the sliding frame at least partially extends into the heating tank to form a food tray. In this way, when the sliding frame is reset, the food tray can be reset with the sliding frame and the food in the heating tank can be taken out, making it more convenient for users to use.

[0023] In some embodiments, a guide rod arranged vertically is provided in the housing, and the sliding frame is slidably connected to the guide rod. The guide rod has a simple structure, stable operation, and is easy to implement.

[0024] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0025] In the toaster of the embodiment of the present invention, when the sliding frame slides to the first position, the first switch switches from the open state to the closed state, the furnace component is powered on and starts to heat the food in the heating groove, and the third switch switches from the open state to the closed state, thereby forming two parallel paths with the second switch; when the sliding frame continues to slide toward the groove bottom direction of the heating groove to the second position, the sliding frame keeps triggering the first switch and triggers the second switch, so that the second switch is disconnected, thereby cutting off one of the two parallel paths; when the sliding frame cannot be reset due to a fault such as being stuck, when the furnace component is heated to a preset time, the circuit board will still send a third signal to the third switch, and after receiving the third signal, the third switch switches from the closed state to the open state, and can also cut off the other of the two parallel paths, so that the furnace component can be powered off and stop heating, thereby providing secondary protection for the toaster, improving the safety of the toaster, having a low production cost, and being easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a toaster according to an embodiment of the present invention when the sliding frame is in an initial position;

[0027] Figure 2 It is a structural schematic diagram of a toaster according to an embodiment of the present invention when the sliding frame is in a first position;

[0028] Figure 3-Figure 6 They are circuit principle diagrams of the toaster according to the embodiment of the present invention when it is in different states.

[0029] Description of reference numerals:

[0030] 1-shell; 2-furnace chamber assembly; 3-heating tank; 4-sliding frame; 5-magnetic element; 6-guide rod; 7-first switch; 8-second switch; 9-third switch; 10-electromagnet; 11-circuit board; 12-first heating unit; 13-second heating unit. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] See also Figure 1-Figure 3 As shown, an embodiment of the present invention provides a toaster, which includes: a shell 1, a furnace component 2, a sliding frame 4, a reset member (not shown in the figure), a first switch 7, a second switch 8, a third switch 9, an electromagnet 10 and a circuit board 11, wherein the furnace component 2 is arranged in the shell 1, and at least one heating groove 3 is arranged in the furnace component 2, and the furnace component 2 can heat the food inserted in the heating groove 3 after being powered on; the sliding frame 4 is slidably arranged in the shell 1, and a magnetic attraction member 5 is arranged on the sliding frame 4, and the magnetic attraction member 5 can be, for example, iron sheet or magnet sheet; the reset member is used to slide to the sliding frame 11. The movable frame 4 applies a reset elastic force, and the reset member can be, for example, a reset spring, which can be connected between the sliding frame 4 and the shell 1; the first switch 7 and the second switch 8 are both arranged at a position corresponding to the sliding frame 4 in the shell 1, and the first switch 7 and the second switch 8 are connected in series with the furnace component 2 to form a loop, the first switch 7 is a normally open switch, and the second switch 8 is a normally closed switch; the third switch 9 is connected in parallel with the second switch 8; the electromagnet 10 is arranged at a position corresponding to the magnetic attraction member 5 in the shell 1; the circuit board 11 is electrically connected to the third switch 9 and the electromagnet 10 respectively.

[0033] In a specific implementation, a guide rod 6 arranged vertically may be provided in the housing 1, and the sliding frame 4 may be slidably connected to the guide rod 6, and the initial position of the sliding frame 4 may be located at a position close to the notch of the heating groove 3. The sliding frame 4 may partially extend into the heating groove 3 to form a food tray for supporting food, and the sliding frame 4 may also partially extend out of the housing 1 to form a handle, or be connected to a handle extending out of the housing 1. The first switch 7 may be provided at a first position close to the bottom of the heating groove 3, and the second switch 8 may be provided at a second position close to the bottom of the heating groove 3.

[0034] When the toaster is not in use, the sliding frame 4 is located at the initial position. Figure 1 As shown, at this time, the first switch 7 is in an open state, and the second switch 8 is in a closed state. Figure 3 When in use, the handle can be moved to drive the sliding frame 4 to slide toward the bottom of the heating tank 3 to the first position, as shown in FIG. Figure 2As shown. At this time, the sliding frame 4 can trigger the first switch 7, and the first switch 7 switches from the open state to the closed state. Since the second switch 8 is a normally closed switch, the circuit formed by the first switch 7, the second switch 8 and the furnace assembly 2 switches to the closed state, and the furnace assembly 2 is powered on and starts to heat the food in the heating tank 3. At the same time, the circuit board 11 also starts timing, and the circuit board 11 also sends the first signal and the second signal to the third switch 9 and the electromagnet 10 respectively. After receiving the first signal, the third switch 9 switches from the open state to the closed state, thereby forming two parallel paths with the second switch 8, as shown. Figure 4 After receiving the second signal, the electromagnet 10 is powered on and generates an electromagnetic field, thereby attracting the magnetic attraction member 5 on the sliding frame 4 to prevent the sliding frame 4 from resetting to the initial position, and can also drive the sliding frame 4 to continue to slide toward the bottom of the heating tank 3 to the second position, and the sliding frame 4 keeps triggering the first switch 7 and triggers the second switch 8, so that the second switch 8 is disconnected, thereby cutting off one of the two parallel paths, as shown in FIG. Figure 5 shown.

[0035] When the sliding frame 4 is in a fault-free state, when the furnace core assembly 2 is heated to a preset time, the circuit board 11 sends a third signal and a fourth signal to the third switch 9 and the electromagnet 10 respectively. After receiving the third signal, the third switch 9 switches from a closed state to an open state, and the other of the two parallel paths is also cut off. The furnace core assembly 2 is powered off and stops heating. The electromagnet 10 is also powered off after receiving the fourth signal, and the generated electromagnetic field disappears and no longer attracts the magnetic suction member 5. The sliding frame 4 is reset to its initial position under the action of the reset member. During the reset process of the sliding frame 4, the food in the heating tank 3 can be lifted out of the heating tank 3 through the food holder. The first switch 7 is switched from a closed state to an open state, and the second switch 8 is switched from an open state to a closed state.

[0036] When the sliding frame 4 is stuck due to a fault, when the furnace assembly 2 is heated to the preset time, the circuit board 11 still sends the third signal and the fourth signal to the third switch 9 and the electromagnet 10 respectively. After receiving the third signal, the third switch 9 switches from the closed state to the open state, and can still cut off the other of the two parallel paths. Figure 6 As shown, the furnace component 2 is powered off and stops heating, providing secondary protection for the toaster, improving the safety of the toaster, having a low production cost and being easy to promote and apply.

[0037] In a specific implementation, the circuit board 11 is not limited to sending the third signal and the fourth signal to the third switch 9 and the electromagnet 10 only after heating to a preset time. The toaster may also include a fourth switch electrically connected to the circuit board 11, and the fourth switch can generate and send a fifth signal to the circuit board 11 according to the user's control. After receiving the fifth signal, the circuit board 11 can send the third signal and the fourth signal to the third switch 9 and the electromagnet 10 respectively. In this way, the toaster can automatically control the heating time and can also pause the heating according to the manual control of the user, which can improve the controllability of the toaster and thus improve the user experience.

[0038] In some embodiments, the furnace assembly 2 may include a first heating unit 12 and a second heating unit 13 connected in series. The specific forms of the first heating unit 12 and the second heating unit 13 are not limited, for example, they may be a section of a heating wire, one of a plurality of heating wires, or one of a plurality of heating sheets. The circuit board 11 is connected in series with the first heating unit 12 and in parallel with the second heating unit 13. When the furnace assembly 2 is powered on, the voltage across the circuit board 11 is adapted to the voltage across the second heating unit 13. In this way, by adjusting the resistance of the first heating unit 12 and the second heating unit 13, the voltage across the second heating unit 13 can be adjusted to adapt to the power supply voltage of the circuit board 11, such as 12V or 5V, and then the circuit board 11 is powered, eliminating the need for a dedicated voltage transformer circuit, which is beneficial to simplifying the circuit structure of the toaster and can further reduce production costs.

[0039] In some embodiments, the first switch 7 can be a double-on double-off switch, which includes two sub-switches, which are respectively connected to the live wire and the neutral wire in the AC circuit. When closed, the live wire and the neutral wire can be connected at the same time, and when disconnected, the live wire and the neutral wire can be cut off at the same time, which has good safety. The second switch 8 can be a travel switch, which has sensitive control, reliable operation and long service life. The third switch 9 can be a magnetic control switch, which has fast action, stable operation, long service life and small size. The magnetic control switch can be a relay or a magnetron.

[0040] In the toaster of the embodiment of the present invention, when the sliding frame 4 is stuck and cannot be reset, when the furnace component 2 is heated to a preset time, the circuit board 11 will still send a third signal to the third switch 9. After receiving the third signal, the third switch 9 switches from a closed state to an open state, which can still cut off the power to the furnace component 2 and stop heating, thereby providing secondary protection for the toaster, improving the safety of the toaster, having a low production cost, and being easy to promote and apply.

[0041] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A toaster, characterized in that: include: case; A furnace component, which is arranged in the shell, and has at least one heating tank for heating food; A sliding frame, which is slidably disposed in the housing, and a magnetic attraction member is disposed on the sliding frame; A reset member, used for applying a reset elastic force to the sliding frame; A first switch and a second switch, both of which are arranged at positions corresponding to the sliding frame in the housing, the first switch and the second switch are connected in series with the furnace component to form a loop, the first switch is a normally open switch, and the second switch is a normally closed switch; a third switch connected in parallel with the second switch; An electromagnet, which is arranged in the housing at a position corresponding to the magnetic attraction member; a circuit board, which is electrically connected to the third switch and the electromagnet respectively; Wherein, when the sliding frame slides to the first position, the first switch is triggered, the furnace component is powered on, and the circuit board sends a first signal and a second signal to the third switch and the electromagnet respectively, so that the third switch is closed, the electromagnet is powered on and attracts the magnetic attraction member; when the sliding frame continues to slide to the second position, the first switch is kept triggered and the second switch is triggered, so that the second switch is disconnected; When the furnace core assembly is heated to a preset time, the circuit board sends a third signal and a fourth signal to the third switch and the electromagnet respectively, the third switch is disconnected, the furnace core assembly and the electromagnet are powered off, the sliding frame is reset to the initial position, the first switch is disconnected, and the second switch is closed.

2. The toaster according to claim 1, characterized in that: The furnace assembly includes a first heating unit and a second heating unit connected in series, the circuit board is connected in series with the first heating unit and in parallel with the second heating unit, and when the furnace assembly is powered on, the voltage across the circuit board is adapted to the voltage across the second heating unit.

3. The toaster according to claim 1, characterized in that: When the circuit board receives the fifth signal sent by the fourth switch, the circuit board sends the third signal and the fourth signal to the third switch and the electromagnet respectively.

4. The toaster according to claim 1, characterized in that: The first switch is a double-on, double-off switch.

5. The toaster according to claim 1, characterized in that: The second switch is a travel switch.

6. The toaster according to claim 1, characterized in that: The third switch is a magnetically controlled switch.

7. The toaster according to claim 1, characterized in that: The sliding frame at least partially extends into the heating groove to form a food support.

8. The toaster according to claim 1, characterized in that: A guide rod arranged vertically is arranged in the shell, and the sliding frame is slidably connected to the guide rod.

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