Electric mixer with LC magnetic control safety interlock structure

Abstract

The utility model discloses a kind of electric mixer with LC magnetic control safety interlocking structure, including base, cup body and cup cover, motor is fixed in base. Cup body top is fixed with magnetron switch, cup cover is fixed with magnet;Cup body bottom is fixed with first induction coil and capacitor, and magnetron switch of cup body top is together in series to form LC resonant circuit, the top surface of base is fixed with the second induction coil electromagnetically coupled with first induction coil;Control circuit board is equipped in base, control circuit board drives second induction coil and detects its feedback signal;When cup cover is closed, magnet on cup cover triggers magnetron switch to close, LC resonant circuit and second induction coil form coupled resonance;Only when control circuit board detects resonance signal, allow motor to start, to realize the interlocking protection that cup body cup cover is in place simultaneously.The structure of the utility model is reasonable, does not need separate mechanical push rod, does not need NFC communication module, and it is beneficial to improve use safety reliability.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric mixers, specifically relating to an electric mixer with an LC magnetic control safety interlock structure. Background Technology

[0002] Electric mixers are a common type of electrical appliance used for cutting and shredding food. They typically consist of a base, a mixing cup, and a lid, as shown in CN202223553615.6. While they meet the basic requirements, the lid needs to be closed during mixing. Traditional electric mixers cannot effectively determine whether the lid is properly closed, requiring manual judgment. They also need to be combined with mechanical rods or NFC to form a complex structure, which not only limits the stability of use but also greatly increases processing costs. Furthermore, there are certain safety concerns, making it difficult to meet market demands. Utility Model Content

[0003] The purpose of this invention is to provide an electric mixer with an LC magnetic control safety interlock structure that has a reasonable structural design and is safe and reliable to use.

[0004] The technical solution to achieve the purpose of this utility model is an electric mixer with an LC magnetic control safety interlock structure, including a base with a motor fixed, a cup body and a cup lid, and a magnetic control switch fixed on the top of the cup body;

[0005] A magnet is fixed to the cup lid;

[0006] A first induction coil and a capacitor are fixed at the bottom of the cup body, and are connected in series with the magnetic switch through wires to form an LC resonant circuit.

[0007] A second induction coil, which is electromagnetically coupled to the first induction coil, is fixed on the top surface of the base; a control circuit board is provided inside the base, which drives the second induction coil and detects its feedback signal.

[0008] The cup body is positioned and the lid is closed. The magnet on the lid triggers the magnetic switch to close, and the LC resonant circuit and the second induction coil form a coupled resonance.

[0009] The motor is allowed to start only when the control circuit board detects a resonance signal, so as to achieve interlock protection that allows the cup body and lid to be in place simultaneously.

[0010] A further preferred embodiment is that the resonant point of the LC resonant circuit is 50-200kHz, and the operating frequency of the control circuit board driving the second induction coil is within the range of 50-200kHz.

[0011] A further preferred embodiment is that the bottom surface of the cup lid is provided with an inlay hole, and the magnet is fixed in the inlay hole.

[0012] A further preferred embodiment is that a control panel connected to the control circuit board is provided on the side wall of the base.

[0013] A further preferred embodiment is that the base is provided with a power cord.

[0014] A further preferred embodiment is that the bottom surface of the cup body is provided with an annular groove, and the first induction coil is positioned within the annular groove.

[0015] A further preferred embodiment is that an embedded magnetic ring is provided around the first induction line to enhance the magnetic flux focusing rate.

[0016] A further preferred embodiment is that a flexible EMI shielding layer is filled between the second induction coil and the motor.

[0017] A further preferred embodiment is that the magnetic switch is one or multiple switches connected in series.

[0018] This utility model has positive effects: The structure of this utility model is reasonably designed. It forms an LC resonant circuit through a magnet, a magnetic control switch, a first induction coil, and a capacitor. In conjunction with the second induction coil in the base, when the cup lid is closed, the magnet triggers the magnetic control switch to close, causing the LC resonant circuit to absorb energy. The load circuit is sensed through the second induction coil, and the control circuit receives the signal from the second induction coil and allows the motor to start. At this time, the start and stop control of the motor can be realized through the control panel.

[0019] When the cup lid is opened, the magnetic switch is disconnected, the load circuit on the second induction coil disappears, and the control circuit board receives the signal to stop the motor. It does not require a separate mechanical push rod or an NFC communication module, which helps to reduce processing costs. At the same time, the use of a magnet in conjunction with the magnetic switch can also help improve safety and reliability, making it highly applicable. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0023] Figure 3 This is another structural view of the disassembled structure of this utility model;

[0024] Figure 4 This is a simplified circuit diagram of the present invention.

[0025] Reference numerals: 1. Base; 2. Cup body; 3. Cup lid; 4. Motor; 5. First induction coil; 6. Capacitor; 7. Magnetic switch; 8. Wire; 9. Magnet; 10. Second induction coil; 11. Control circuit board; 12. Embedding hole; 13. Control panel; 14. Annular groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example

[0028] See Figures 1 to 4 As shown, an electric mixer with an LC magnetic control safety interlock structure includes a base 1 with a motor fixed, a cup body 2 and a cup lid 3. In this embodiment, the above structure is a conventional structure of the prior art, so it is not described in detail.

[0029] A magnetic switch 7 is fixed to the top of the cup body; a magnet 9 is fixed to the cup lid; a first induction coil 5 and a capacitor 6 are fixed to the bottom of the cup body, which are connected in series with the magnetic switch through wires to form an LC resonant circuit; a second induction coil 10, which is electromagnetically coupled to the first induction coil, is fixed to the top surface of the base; a control circuit board 11 is provided inside the base, which drives the second induction coil and detects its feedback signal; when the cup body is placed and the cup lid is closed, the magnet on the cup lid triggers the magnetic switch to close, and the LC resonant circuit and the second induction coil form a coupled resonance; the motor 4 is allowed to start only when the control circuit board detects the resonance signal, so as to achieve interlock protection of the cup body and the cup lid being in place at the same time.

[0030] The above structure does not require active electronic components, which helps to reduce costs and ease of use. The magnetic switch is a conventional structure in existing technology, so it is not described in detail. The resonant point of the LC resonant circuit is 50-200kHz. With the above structure, the LC resonant circuit does not require active electronic components, nor does it require mechanical push rods or NFC / dual coil communication, thus making the overall structure simpler and helping to reduce costs.

[0031] An embedded magnetic ring is provided around the first induction line to improve the magnetic flux focusing rate. This can improve the magnetic flux focusing efficiency. The magnetic control switch can also be replaced with a tactile switch or similar device. Different types of cups may have different LC resonant frequencies; the control circuit identifies the container type and selects the corresponding operating mode based on the resonant frequency. In practical applications, the magnetic control switch can be single or multiple switches connected in series. When multiple series-connected magnetic control switches close synchronously, the magnetic control switch starts and stops, improving the smoothness and reliability of use.

[0032] In this embodiment, a second induction coil 10, which is electromagnetically coupled to the first induction coil, is fixed on the top surface of the base. A control circuit board 11 connected to the second induction coil is provided inside the base. The drive end of the control circuit board is connected to the motor. The control circuit board has a conventional structure in the prior art and is simply applied, so it is not described in detail. It outputs a fixed frequency and samples the voltage and phase changes of the second induction coil in real time. It is simply applied. The operating frequency of the control circuit board driving the second induction coil is in the range of 50-200kHz, which can meet the usage requirements of different situations.

[0033] In this embodiment, the control circuit excites the second induction coil at 125kHz. When the magnet triggers the magnetic switch to close, the magnetic field changes, causing the LC resonant circuit to resonate. This alters the voltage and phase of the second induction coil, transmitting a signal to the control circuit board, which then allows the motor to operate. A flexible EMI shielding layer is placed between the second induction coil and the motor. This reduces noise from adjacent motor windings, minimizes false triggering and external magnetic interference, and provides good waterproofing for the entire cup body and lid, meeting dishwasher requirements and enhancing cleaning convenience.

[0034] Meanwhile, its control circuit board can sweep or sequentially excite the first induction coil with two or more excitation frequencies, detect the coupling response of the LC resonant circuit at each frequency point, obtain the center frequency and amplitude of the resonant peak, and make each container have a unique resonant frequency characteristic by connecting different capacitance values ​​in parallel with the first coil, realizing passive ID identification without chips. When a resonant peak matching the preset frequency table is detected and the amplitude exceeds the threshold, it is determined that the cup body / lid is correctly positioned and the start is allowed, realizing identification without RFID / NFC chips, and automatically calibrating component tolerances to improve detection accuracy.

[0035] The size of the cup can be set as needed, and the size of the first induction coil is matched with the size of the cup, while the second induction coil only needs to be able to sense the LC resonant circuit, so that the base can meet the needs of cups of different models and sizes.

[0036] In use, when the cup lid is closed, the magnet triggers the magnetic control switch to close, and the LC resonant circuit and the second induction coil form a load circuit. The control circuit board receives the signal from the second induction coil and allows the motor to start. At this time, the motor's start and stop operations can be achieved through the control panel, ensuring the effectiveness and stability of the cell wall breaking process. When the magnet is released, the control circuit board controls the motor to stop. When the LC resonant circuit is not resonant and the voltage of the second induction coil is normal, the motor is not allowed to start and stops working. At the same time, the control panel cannot achieve motor start and stop control, thereby improving the safety of use. Compared with traditional technologies, it does not require a mechanical push rod or RFID / NFC / dual-coil communication, which helps to reduce costs and simplifies the overall structure, making assembly and maintenance easier. Through the cooperation of the magnetic field of the magnet and the magnetic control switch, any component failure, such as a capacitor short circuit, will lead to an impedance abnormality, achieving machine locking and improving the safety and reliability of use.

[0037] In this embodiment, the bottom surface of the cup lid is provided with an inlay hole 12, and the magnet is fixed in the inlay hole. This structure facilitates the assembly and use of the various structural parts, and also makes disassembly and maintenance easier. Furthermore, the inlay hole position matches the position of the magnetic switch.

[0038] In this embodiment, a control panel 13 connected to the control circuit board is provided on the side wall of the base. A power cord is provided on the base. With the above structure, when the cup is placed in the positioning position and the magnetic switch is closed by the magnet, the control panel can control the motor. When the cup is moved away or the magnetic switch is opened, the control panel is ineffective.

[0039] In this embodiment, the bottom surface of the cup body is provided with an annular groove 14, and the first induction coil is positioned within the annular groove. This facilitates the installation and positioning of the first induction coil.

[0040] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. An electric mixer with an LC magnetic control safety interlock structure, comprising a base with a motor fixed thereon, a cup body, and a cup lid, characterized in that: A magnetic switch is fixed to the top of the cup body; A magnet is fixed to the cup lid; A first induction coil and a capacitor are fixed at the bottom of the cup body, and are connected in series with the magnetic switch through wires to form an LC resonant circuit. A second induction coil, which is electromagnetically coupled to the first induction coil, is fixed on the top surface of the base; a control circuit board is provided inside the base, which drives the second induction coil and detects its feedback signal. The cup body is positioned and the lid is closed. The magnet on the lid triggers the magnetic switch to close, and the LC resonant circuit and the second induction coil form a coupled resonance. The motor is allowed to start only when the control circuit board detects a resonance signal, so as to achieve interlock protection that allows the cup body and lid to be in place simultaneously.

2. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: The resonant point of the LC resonant circuit is 50-200kHz, and the operating frequency of the control circuit board driving the second induction coil is within the range of 50-200kHz.

3. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: The bottom surface of the cup lid is provided with an inlay hole, and the magnet is fixed in the inlay hole.

4. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: A control panel connected to the control circuit board is provided on the side wall of the base.

5. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: A power cord is provided on the base.

6. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: The bottom surface of the cup is provided with an annular groove, and the first induction coil is positioned within the annular groove.

7. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: An embedded magnetic ring is provided around the first induction line to improve the magnetic flux focusing rate.

8. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: A flexible EMI shielding layer is filled between the second induction coil and the motor.

9. An electric mixer with an LC magnetic control safety interlock structure according to claim 1, characterized in that: The magnetic switch may be one or multiple switches connected in series.

Images