WO2021179402A1

WO2021179402A1 - Toaster

Info

Publication number: WO2021179402A1
Application number: PCT/CN2020/085754
Authority: WO
Inventors: 郭建刚; 唐浩
Original assignee: 广东力升电器有限公司
Priority date: 2020-03-11
Filing date: 2020-04-21
Publication date: 2021-09-16

Abstract

A toaster. The toaster comprises a housing (1), a toaster container assembly (2), a sliding frame (4), a reset member, a first switch (7), a second switch (8), a third switch (9), an electromagnet (10), and a circuit board (11); the toaster container assembly (2) is disposed in the housing (1); the sliding frame (4) is slidably disposed in the housing (1), and a magnetic attraction member (5) is disposed on the sliding frame (4); the reset member is used for applying reset elastic force to the sliding frame (4); the first switch (7) and the second switch (8) are both disposed at the positions, corresponding to the sliding frame (4), in the housing (1), the first switch (7) and the second switch (8) are connected to the toaster container assembly (2) in series to form a return circuit, 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 to the second switch (8) in parallel; the electromagnet (10) is disposed at the position, corresponding to the magnetic attraction member (5), in the housing (1); the circuit board (11) is electrically connected to the third switch (9) and the electromagnet (10), respectively. According to the toaster, when the sliding frame (4) cannot be reset due to faults, the toaster container assembly (2) can still be powered off, secondary protection is provided for the toaster, high safety is achieved, and the production cost is low.

Description

A toaster

Technical field

The embodiment of the present invention relates to the technical field of household appliances, in particular to a toaster.

Background technique

Toaster, commonly known as automatic bread slice oven, bread toaster, is an electric cooker specially used to re-bake sliced bread. Using it, not only can the slices of bread be baked into browned yellow, but also can make it more scent and taste better, and increase appetite. With the change of users' living habits and the improvement of their living standards, toasters are becoming more and more popular among users.

The cavity of the toaster is usually provided with a sliding rack that can slide up and down. After the food to be baked is put into the cavity, the sliding rack slides into the bottom of the cavity in a vertical direction, and triggers the switch part to conduct the furnace. Then the food is heated, and when the preset heating time is reached, the controller controls the sliding frame to bounce up, thereby cutting off the heating circuit. For example, the Chinese invention patent with the authorized announcement number CN205849313U discloses a toaster, which includes a furnace body and a plurality of bread troughs opened in the furnace body. The controller of the power-on time of the heating plate assembly, the controller is equipped with a relay or a switch unit. However, this kind of toaster is prone to fail to cut off the heating circuit due to the jam of the sliding frame, which poses safety hazards and high production costs.

Summary of the invention

In view of the above-mentioned problems in the prior art, the embodiments of the present invention provide a toaster with higher safety and lower production cost.

To solve the above-mentioned problems, the technical solutions provided by the embodiments of the present invention are:

A toaster including:

case;

A furnace liner assembly, which is arranged in the shell, and the furnace liner assembly has at least one heating groove for heating food;

A sliding frame, which is slidably arranged in the casing, and a magnetic attraction member is arranged on the sliding frame;

A reset piece, which is used to apply 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, and the first switch and the second switch are connected in series with the furnace assembly to form Loop, the first switch is a normally open switch, and the second switch is a normally closed switch;

A third switch, which is connected in parallel with the second switch;

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

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 assembly is powered on, and the circuit board sends first signals to the third switch and the electromagnet respectively And the second signal, the third switch is closed, the electromagnet is powered on and attracts the magnetic attraction; when the sliding frame continues to slide to the second position, the first switch is kept triggered and triggered The second switch to turn off the second switch;

When the furnace assembly is heated for 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, and the furnace The components and the electromagnet are powered off, the sliding frame is reset to the initial position, the first switch is opened, and the second switch is closed. The toaster can still cut off the power of the furnace assembly when the sliding frame is stuck due to a failure, provide secondary protection for the toaster, improve the safety of the toaster, and have low production costs and easy promotion and application.

In some embodiments, the furnace assembly includes a first heating unit and a second heating unit connected in series, and the circuit board is connected in series with the first heating unit and connected in parallel with the second heating unit. When the furnace assembly is powered on, the voltage at both ends of the circuit board is adapted to the voltage at both ends of the second heating unit. By adjusting the resistances of the first heating unit and the second heating unit, the voltage at both ends of 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 the need for a dedicated transformer circuit, which is beneficial In order to simplify the circuit structure of the toaster, the production cost can be further reduced.

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. Signal. While the toaster can automatically control the heating time, it can also suspend heating according to the user's manual control, which can improve the maneuverability of the toaster, thereby improving user experience.

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

In some embodiments, the second switch is a limit switch. The travel switch is sensitive in control, reliable in work and long in life.

In some embodiments, the third switch is a magnetic control switch. The magnetic control switch has fast action, stable operation, long service life and small size.

In some embodiments, the sliding rack at least partially extends into the heating groove to form a food tray. In this way, when the sliding rack is reset, the food tray can reset with the sliding rack and lift out the food in the heating tank, which makes it more convenient for users to use.

In some embodiments, a guide rod arranged in a vertical direction 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 easy realization.

Compared with the prior art, the beneficial effects of the embodiments of the present invention are:

In the toaster of the embodiment of the present invention, when the sliding frame is slid to the first position, the first switch is switched from the open state to the closed state, the furnace assembly starts to heat the food in the heating tank, and the third switch is turned off. The open state is switched to the closed state, thereby forming two parallel paths with the second switch; when the sliding frame continues to slide toward the bottom of the heating tank to the second position, the sliding frame keeps triggering the first switch and triggers the second switch, so that The second switch is turned off, thereby cutting off one of the two parallel paths; when the sliding frame cannot be reset due to a fault such as jamming, and the furnace assembly is heated to a preset time, the circuit board will still send to the third switch The third signal, the third switch switches from the closed state to the open state after receiving the third signal. It can also cut off the other of the two parallel paths, which can power off the furnace assembly and stop heating, providing a toaster The secondary protection improves the safety of the toaster, the production cost is low, and it is easy to popularize and apply.

Description of the drawings

Fig. 1 is a schematic diagram of the structure when the sliding frame of the toaster is in the initial position according to the embodiment of the present invention;

2 is a schematic structural diagram of the toaster of the embodiment of the present invention when the sliding frame is in the first position;

Fig. 3 to Fig. 6 are circuit schematic diagrams when the toaster of the embodiment of the present invention is in different states.

Description of reference signs:

1- housing; 2- furnace assembly; 3- heating tank; 4- sliding frame; 5- magnetic attraction member; 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 ways

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 will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to Figures 1 to 3, an embodiment of the present invention provides a toaster, the toaster includes: a shell 1, a furnace assembly 2, a sliding frame 4, a reset piece (not shown in the figure), The first switch 7, the second switch 8, the third switch 9, the electromagnet 10 and the circuit board 11, wherein the furnace assembly 2 is arranged in the housing 1, and the furnace assembly 2 is provided with at least one heating groove 3, After the pan assembly 2 is powered on, the food stuffed into the heating tank 3 can be heated; the sliding frame 4 is slidably arranged in the housing 1, and the sliding frame 4 is provided with a magnetic member 5, which may be, for example, iron sheet Or a magnet piece; the reset member is used to apply a reset elastic force to the sliding frame 4, the reset member may be, for example, a reset spring, which may be connected between the sliding frame 4 and the housing 1; the first switch 7 and the second switch 8 are two The first switch 7 and the second switch 8 are connected in series with the furnace assembly 2 and 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 in the housing 1 at a position corresponding to the magnetic attraction member 5; the circuit board 11 is respectively connected to the third switch 9 and the electromagnet 10Electrical connection.

In specific implementation, the housing 1 may be provided with a guide rod 6 arranged in a vertical direction, the sliding frame 4 can be slidably connected to the guide rod 6, and the initial position of the sliding frame 4 may be located near the notch of the heating groove 3. Location. The sliding frame 4 can be partially extended into the heating tank 3 to form a food tray for holding food, and the sliding frame 4 can also be partially extended outside the housing 1 to form a handle, or may be combined with a handle that extends outside the housing 1 connect. The first switch 7 may be disposed at a first position close to the bottom of the heating tank 3, and the second switch 8 may be disposed at a second position close to the bottom of the heating tank 3.

When the toaster is not in use, the sliding frame 4 is in the initial position, as shown in FIG. 1. At this time, the first switch 7 is in the open state, and the second switch 8 is in the closed state, as shown in FIG. 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. 2. At this time, the sliding frame 4 can trigger the first switch 7, and the first switch 7 is switched from the open state to the closed state. Since the second switch 8 is a normally closed switch, the first switch 7, the second switch 8 and the furnace bladder The circuit formed by the assembly 2 is switched to the closed state, 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, and the third switch 9 switches from the off state after receiving the first signal. In the closed state, two parallel paths are formed with the second switch 8, as shown in FIG. 4. After the electromagnet 10 receives the second signal, it is powered on and generates an electromagnetic field, which then attracts the magnetic attraction member 5 on the sliding frame 4 to prevent the sliding frame 4 from resetting to the initial position, and it can also drive the sliding frame 4 to the bottom of the heating groove 3 When sliding to the second position, the sliding frame 4 keeps triggering the first switch 7 and triggers the second switch 8, so that the second switch 8 is turned off, thereby cutting off one of the two parallel paths, as shown in FIG. 5.

When the sliding frame 4 is in a fault-free state, when the furnace assembly 2 is heated to a preset time, the circuit board 11 sends the third signal and the fourth signal to the third switch 9 and the electromagnet 10, respectively, and the third switch 9 receives the second signal. After the three signals, the closed state is switched to the off state, the other of the two parallel paths is also cut off, the furnace assembly 2 is powered off to stop heating, and the electromagnet 10 is also powered off after receiving the fourth signal, resulting in an electromagnetic field Disappear and no longer attract the magnetic attraction member 5. The sliding frame 4 is reset to the initial position under the action of the resetting part. During the resetting 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 tray. The switch 7 is switched from the closed state to the open state, and the second switch 8 is switched from the open state to the closed state.

When the sliding frame 4 is stuck due to a malfunction and 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, and the third switch 9 receives After the third signal is switched from the closed state to the open state, the other of the two parallel paths can still be cut off, as shown in Figure 6, so that the furnace assembly 2 is powered off and stops heating, providing secondary protection for the toaster , To improve the safety of the toaster, the production cost is low, and it is easy to popularize and apply.

In 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 further include a fourth switch electrically connected to the circuit board 11. The fourth switch can generate and send a fifth signal to the circuit board 11 according to the user's manipulation. After the circuit board 11 receives the fifth signal, The third signal and the fourth signal can be sent to the third switch 9 and the electromagnet 10, respectively. In this way, while the toaster can automatically control the heating time, it can also suspend heating according to the user's manual control, which can improve the maneuverability of the toaster, thereby improving the user experience.

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 form of the first heating unit 12 and the second heating unit 13 is not limited, for example, it may be a heating unit. A section of the wire, one of the heating wires, or one of the heating chips. The circuit board 11 is connected in series with the first heating unit 12 and connected in parallel with the second heating unit 13. When the furnace assembly 2 is powered on, the voltage across the circuit board 11 matches the voltage across the second heating unit 13. In this way, by adjusting the resistances of the first heating unit 12 and the second heating unit 13, the voltage at both ends of the second heating unit 13 can be adjusted to match the power supply voltage of the circuit board 11, such as 12V or 5V, and then the circuit board 11 Power supply, eliminating the need for a dedicated transformer circuit, which is beneficial to simplify the circuit structure of the toaster, and can further reduce the production cost.

In some embodiments, the first switch 7 may be a double-pass double-break switch. The double-pass double-break switch includes two sub-switches. The two sub-switches are respectively connected to the live wire and the neutral wire of the AC circuit. The live wire and the neutral wire are connected, and when disconnected, the live wire and the neutral wire can be cut off at the same time, which has better safety. The second switch 8 can be a travel switch, which is sensitive in control, reliable in operation and long in 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.

In the toaster of the embodiment of the present invention, when the sliding frame 4 is stuck and cannot be reset, and the furnace assembly 2 is heated for a preset time, the circuit board 11 will still send a third signal to the third switch 9, and the third switch 9 will accept When the third signal is reached, the closed state is switched to the open state, which can still power off the furnace assembly 2 and stop heating, providing secondary protection for the toaster, improving the safety of the toaster, lowering the production cost, and making it easy Promote applications.

The above embodiments are only exemplary embodiments of the present invention, and are not used to limit the present invention, and the protection scope of the present invention is defined by the claims. Those skilled in the art can 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 should also be regarded as falling within the protection scope of the present invention.

Claims

A toaster is characterized in that it comprises:

case;

A furnace liner assembly, which is arranged in the shell, and the furnace liner assembly has at least one heating groove for heating food;

A sliding frame, which is slidably arranged in the casing, and a magnetic attraction member is arranged on the sliding frame;

A reset piece, which is used to apply 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, and the first switch and the second switch are connected in series with the furnace assembly to form Loop, the first switch is a normally open switch, and the second switch is a normally closed switch;

A third switch, which is connected in parallel with the second switch;

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

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 assembly is powered on, and the circuit board sends first signals to the third switch and the electromagnet respectively And the second signal, the third switch is closed, the electromagnet is powered on and attracts the magnetic attraction; when the sliding frame continues to slide to the second position, the first switch is kept triggered and triggered The second switch to turn off the second switch;

When the furnace assembly is heated for 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, and the furnace The components and the electromagnet are powered off, the sliding frame is reset to the initial position, the first switch is opened, and the second switch is closed.
The toaster according to claim 1, wherein the furnace assembly includes a first heating unit and a second heating unit connected in series, and the circuit board is connected in series with the first heating unit and is connected to the The second heating unit is connected in parallel, and when the furnace assembly is powered on, the voltage at both ends of the circuit board is adapted to the voltage at both ends of the second heating unit.
The toaster according to claim 1, wherein when the circuit board receives the fifth signal sent by the fourth switch, the circuit board sends all signals to the third switch and the electromagnet respectively. The third signal and the fourth signal.
The toaster according to claim 1, wherein the first switch is a double-on and double-off switch.
The toaster according to claim 1, wherein the second switch is a travel switch.
The toaster according to claim 1, wherein the third switch is a magnetic control switch.
The toaster according to claim 1, wherein the sliding frame at least partially extends into the heating tank to form a food tray.
The toaster according to claim 1, wherein a guide rod arranged in a vertical direction is provided in the housing, and the sliding frame is slidably connected to the guide rod.