Cooking electric appliance cover opening and closing mechanism and electric cooker

Abstract

The utility model discloses a cooking electric appliance cover opening and closing mechanism which comprises a locking mechanism, the locking mechanism comprises a lock catch support, a lock catch button, a spring and a digital steering engine, a first buckle is arranged on the lock catch support, the lock catch button is arranged on the surface of one end of the lock catch support, the spring is arranged on the surface of the other end of the lock catch support, and the digital steering engine is arranged on the lock catch support. Lock catch rotating shafts are arranged on the two side edges of the lower end of the lock catch support, the digital steering engine is adjacent to the lock catch support, and a swing rod is arranged on an output shaft of the digital steering engine; the driving mechanism comprises a transmission mechanism and a driving motor, the driving motor drives the transmission mechanism cover position monitoring mechanism, and the driving motor drives the transmission mechanism cover position monitoring mechanism and is arranged at the driving motor to monitor the rotation angle of an output shaft of the driving motor; and a master control PCB assembly. The utility model further discloses an electric cooker. Compared with the prior art, automatic opening and locking closing of the cover assembly are controlled, meanwhile, manual opening and closing operation of a user is not affected, the risk of manual operation is reduced, and operation is simplified.

Description

Technical Field

[0001] The utility model relates to a household appliance, in particular to a cooking appliance cover opening and closing mechanism and an electric rice cooker. Background Art

[0002] Currently, when opening or closing the lid of existing rice cookers and other kitchen cooking appliances on the market, people manually touch the lid to open or close it. This manual direct operation method relies on the user's operating habits. Opening and closing the lid requires different operation methods, which is relatively cumbersome. At the same time, this operation may cause harm from steam and condensed water spraying from the inside of the appliance, which is a poor user experience. In addition, it is impossible to realize automatic opening and closing of the lid, freeing up the hands, and it is not easy to achieve customized operations such as matching automatic cooking and pre-cooling. Utility Model Content

[0003] The purpose of the utility model is to provide a motor-driven switch cover structure and an electric rice cooker, and the technical problem to be solved is to realize automatic or manual opening and closing of the cover.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions: a cooking appliance lid opening and closing mechanism, comprising:

[0005] The locking mechanism includes a lock bracket, a lock button, a spring, and a digital servo. The lock bracket is provided with a first buckle, the lock button is provided on one end surface of the lock bracket, the spring is provided on the other end surface of the lock bracket, and lock shafts are provided on both sides of the lower end of the lock bracket. The digital servo is provided adjacent to the lock bracket, and a rocker arm is provided on the output shaft of the digital servo.

[0006] The driving mechanism includes a transmission mechanism and a driving motor, and the driving motor drives the transmission mechanism;

[0007] The cover position monitoring mechanism is provided at the drive motor to monitor the rotation angle of the output shaft of the drive motor;

[0008] The main control PCB assembly includes a main control PCB board, a main control PCB board connection cover position monitoring mechanism, a drive motor and a digital servo.

[0009] Furthermore, the locking mechanism also includes a driving connecting rod, which is arranged between the lock bracket and the digital servo, so as to drive the driving connecting rod to rotate in conjunction with the rotation of the rocker arm, thereby pressing the lock bracket.

[0010] Furthermore, the driving connecting rod includes a driving plate, a driving cam and a connecting shaft, and the driving plate and the driving cam are respectively arranged on the two ends of the connecting shaft, wherein the driving plate is adjacent to the digital servo and is arranged above the rocker arm, the driving cam is adjacent to the locking bracket, and the driving cam is eccentrically arranged with the connecting shaft. The driving cam includes a fixed end and a free end, the fixed end is connected and fixed to the connecting shaft, and the free end faces the locking bracket.

[0011] Furthermore, the transmission mechanism includes a main rotating gear, a driven gear and a synchronous belt. The main rotating gear is arranged on the output shaft of the driving motor, and the synchronous belt is sleeved on the main transmission gear and the driven gear.

[0012] Furthermore, the cover position monitoring mechanism includes a potentiometer and a monitoring PCB board assembly. The potentiometer is arranged on the monitoring PCB board assembly and is connected to the output shaft of the drive motor through a coupling. The monitoring PCB board assembly is connected to the main control PCB board.

[0013] Furthermore, the cover position monitoring mechanism also includes a mounting box, which is fixed on the horizontal fixing plate, and the potentiometer and the monitoring PCB board assembly are fixed on the mounting box.

[0014] Furthermore, the main control PC B assembly further includes a panel, the main control PCB board is provided with a cover opening button and a cover closing button, and the panel is provided with holes for exposing the cover opening button and the cover closing button.

[0015] Furthermore, the driving mechanism also includes a bracket, a horizontal fixing plate is provided on the bracket, a vertical portion is provided on the horizontal fixing plate, a support sheet is provided at the corresponding positions of the bracket and the vertical portion, a coaxial first through hole and a second through hole are respectively provided at the corresponding positions of the vertical portion and the support sheet, a third through hole is provided at the lower part of the bracket, and the third through hole and the second through hole are located on the same straight line.

[0016] The utility model also discloses an electric rice cooker, comprising a lid assembly, a body support, a body shell and an inner pot, wherein one end of the lid assembly is hinged to the body support via a rotating shaft, and further comprising the cooking appliance lid opening and closing mechanism, wherein the driving mechanism is arranged at one end where the lid assembly is hinged to the body support, the transmission mechanism is connected to the rotating shaft to drive the lid assembly to open and close, the locking mechanism is arranged at one end of the body support away from the rotating shaft, the body support is provided with a hole for the first buckle to extend and be exposed at a position opposite to the first buckle, the first buckle extends from the hole to the outside of the body support, the lid assembly is provided with a second buckle adapted to the first buckle, the locking bracket is rotatably connected to the body support via a locking shaft, the spring rests on the body support, a locking button hole for exposing the locking button is provided on the body shell, and the main control PCB assembly is arranged on the body shell.

[0017] Furthermore, the cross section of the rotating shaft has at least one straight side.

[0018] Compared with the prior art, the present invention realizes the automatic opening and locking closure control of the cover assembly by setting a locking mechanism, a driving mechanism, a cover position monitoring mechanism and a main control PCB assembly, while not affecting the user's manual opening and closing operations, which not only reduces the risk of manual operation but also simplifies the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an electric rice cooker of the present utility model.

[0020] Figure 2 It is a structural diagram of the pot cover assembly of the utility model.

[0021] Figure 3 It is a cross-sectional view of the pot cover assembly of the utility model.

[0022] Figure 4 It is a schematic diagram of the connection between the pot cover assembly and the driving mechanism of the utility model.

[0023] Figure 5 It is a structural diagram of the driving mechanism of the utility model.

[0024] Figure 6 It is a structural diagram of the bracket in the driving mechanism of the utility model.

[0025] Figure 7 This is a positional relationship diagram of the cover position monitoring mechanism and the bracket of the utility model.

[0026] Figure 8 It is a structural diagram of the locking mechanism of the utility model.

[0027] Figure 9 This is a positional relationship diagram of the pot cover assembly and the driving mechanism of the utility model.

[0028] Figure 10 The utility model is a schematic diagram of the lid assembly of the electric rice cooker when it is locked.

[0029] Figure 11 The utility model is a schematic diagram of the rice cooker lid assembly when it is opened.

[0030] Figure 12 This is a diagram showing the positional relationship between the locking mechanism and the pot body bracket of the utility model.

[0031] Figure 13 This is a diagram showing the positional relationship between the main control PCB assembly and the boiler body shell of the utility model.

[0032] Figure 14 yes Figure 12 A partial enlarged view of .

[0033] Figure 15It is a cross-sectional view of the locking mechanism and the pot body bracket of the utility model.

[0034] Figure 16 This is a positional relationship diagram of the components in the locking mechanism of the utility model.

[0035] Figure 17 It is a structural diagram of the driving connecting rod of the utility model.

[0036] Figure 18 This is a schematic diagram of the locking mechanism of the utility model when it is locked. Figure 1 .

[0037] Figure 19 This is a schematic diagram of the locking mechanism of the utility model when it is locked. Figure 2 .

[0038] Figure 20 This is a schematic diagram of the opening process of the locking mechanism of the utility model Figure 3 .

[0039] Figure 21 This is a schematic diagram of the opening process of the locking mechanism of the utility model Figure 4 . DETAILED DESCRIPTION

[0040] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0041] like Figure 5-Figure 8 、 Figure 10 As shown, the utility model discloses a cooking appliance lid opening and closing mechanism, comprising the following mechanisms:

[0042] Locking mechanism 10( Figure 8 As shown in FIG, the locking mechanism 10 includes a lock bracket 101, a lock button 103, a spring 102, and a digital servo 105. The lock bracket 101 is a plate-shaped structure. A first buckle 1012 is provided at the upper end of the lock bracket 101. The lock button 103 is provided on one end surface of the lock bracket 101. The spring 102 is provided on the other end surface of the lock bracket 101. A lock shaft 1011 is provided on both sides of the lower end of the lock bracket 101. The digital servo 105 is arranged adjacent to the lock bracket 101. An eccentrically arranged pendulum rod 106 is provided on the output shaft of the digital servo 105 to press the lock bracket 101 when the digital servo 105 drives the pendulum rod 106 to rotate.

[0043] Drive mechanism ( Figure 5 As shown), the driving mechanism includes a transmission mechanism 7 and a driving motor 5, and the driving motor 5 drives the transmission mechanism 7;

[0044] Cover position monitoring mechanism 8( Figure 7 As shown), it is provided at the drive motor 5 to monitor the rotation angle of the output shaft of the drive motor 5;

[0045] Main control PCB assembly 9( Figure 10 As shown), the main control PCB assembly 9 includes a main control PCB board 92, and the main control PCB board 92 is connected to the cover position monitoring mechanism 8, the digital servo 105 and the drive motor 5.

[0046] like Figure 14 、 Figure 15 and Figure 17 As shown, the locking mechanism 10 further includes a driving link 104 , which is disposed between the lock bracket 101 and the digital servo 105 , so as to drive the driving link 104 to rotate in conjunction with the rotation of the rocker arm 106 , thereby pressing the lock bracket 101 .

[0047] like Figure 17 As shown, the driving link 104 includes a driving plate 1041, a driving cam 1043 and a connecting shaft 1042, and the driving plate 1041 and the driving cam 1043 are respectively arranged on the two ends of the connecting shaft 1042, wherein the driving plate 1041 is adjacent to the digital servo 105 and is arranged above the rocker arm 106, the driving cam 1043 is adjacent to the lock bracket 101, and the driving cam 1043 is eccentrically arranged with respect to the connecting shaft 1042. The driving cam 1043 includes a fixed end and a free end, the fixed end is connected and fixed to the connecting shaft 1042, and the free end faces the lock bracket 101. Platforms 1014 are provided on the left and right edges of the lock bracket 101, and the free end is opposite to and contacts the corresponding platforms 1014. When the rocker arm 106 on the digital servo 105 loses the force on the driving plate 1041, the driving link 104 is reset due to the push of the lock bracket 101 under the reset of the spring 102.

[0048] like Figure 5As shown, the transmission mechanism 7 includes a main rotating gear 71, a driven gear 72 and a synchronous belt 73. The main rotating gear 71 is provided on the output shaft of the driving motor 5, and the synchronous belt 73 is sleeved on the main transmission gear 71 and the driven gear 72. When the driving motor 5 drives the main rotating gear 71 to rotate, the synchronous belt 73 drives the driven gear 72 to rotate, thereby driving the rotating shaft provided on the cover of the cooking appliance to rotate. The advantages of the transmission method of using synchronous wheels and synchronous belts to realize motor rotation in the present invention are mainly as follows: 1. Due to the restrictions on the appearance design requirements of electrical appliances such as rice cookers, the space for installing the rotating mechanism is small, and at the same time, the cost must be optimized. There is no need to increase the transmission elements due to the long distance between the transmission structure and the pot lid. This problem can be solved by adjusting the length of the synchronous belt according to the transmission distance. If a gear transmission is adopted, the number of gears or the diameter of the gears will generally increase as the distance increases, which will greatly increase the space and cost. 2. When using synchronous wheels and synchronous belts for transmission, the diameter of the gears on the transmission mechanism can be designed to be smaller, so that after the gears are installed on the pot lid rotating shaft, they take up little space and have flexible installation positions, which will not have a significant impact on the appearance design of the product. 3. Compared with direct motor drive, the motor shaft needs to be aligned with the pot lid rotating shaft to engage in order to transmit power. The overall size of such a high-torque motor is generally large, and the pot lid rotating shaft is generally located close to the appearance parts. Such an installation method generally affects the appearance design of the product.

[0049] like Figure 5 and Figure 6 As shown, the transmission mechanism 7 also includes a bracket 74, which includes a vertically arranged motor fixing plate 76, a horizontal fixing plate 75 is provided at the upper end of the motor fixing plate 76, the horizontal fixing plate 75 extends horizontally toward one end surface of the motor fixing plate 76, a vertical portion 751 is provided on the horizontal fixing plate 75, a support piece 741 is provided at the upper end of the motor fixing plate 76 and corresponding to the vertical portion 751, and an accommodating space for accommodating the driven gear 72 is provided between the support piece 741 and the vertical portion 751. A coaxial first through hole 752 and a second through hole 742 are respectively provided at the corresponding positions of 751 and the support plate 741 for the rotating shaft to pass through and limit the driven gear 72 in the accommodating space. A third through hole 743 is provided at the lower part of the bracket 74. The third through hole 743 and the second through hole 742 are located on the same straight line. The drive motor 5 is fixed to the end surface of the motor fixing plate 76 away from the horizontal fixing plate 75 by screws, and the output shaft of the drive motor 5 extends from the third through hole 743 to be opposite to the driven gear 72.

[0050] like Figure 7As shown, the cover position monitoring mechanism 8 includes a potentiometer 84, a monitoring PCB board assembly 81, and a mounting box 83. The mounting box 83 is fixed to the horizontal fixing plate 75 by screws, and the monitoring PCB board assembly 81 is fixed to the mounting box 83. The potentiometer 84 is arranged on the monitoring PCB board assembly 81 and is connected to the output shaft of the driving electrode 5 through a coupling 82 so that it rotates synchronously. Different rotation positions generate different electrical signals output to the main control PCB assembly 9, and the rotation angle position of the driving motor 5 is detected by the potentiometer 84.

[0051] like Figure 5 As shown, the cross section of the output shaft of the driving motor 5 has at least one straight side to form a special-shaped structure similar to a D-shape, ensuring that the rotation of the output shaft of the driving motor can be transmitted to the lid of the cooking appliance.

[0052] like Figure 10 and Figure 13 As shown, the main control PCB assembly 9 also includes a panel 91, and the main control PCB board 92 is provided with a cover opening button 93 and a cover closing button 94. The panel 91 is provided with holes for exposing the cover opening button 93 and the cover closing button 94. In the present utility model, the main control PCB board 92 has a wireless control function.

[0053] In the present invention, the digital servo 105 is a component in which, after receiving a control signal, the internal motor can rotate an angle in the forward or reverse direction according to the control signal.

[0054] Below we apply the above structure to an electric rice cooker for detailed description.

[0055] like Figure 1 and Figure 2 As shown, the electric rice cooker generally includes a cover assembly 1, a body support 3, a body shell 4 and an inner pot 2, wherein:

[0056] The pot cover assembly 1 includes a pot cover upper cover 11 and a pot cover lower cover 12 ( Figure 2 and Figure 3 As shown), the pot cover upper cover 11 has an inner cavity, the pot cover lower cover 12 is arranged in the inner cavity and is connected and fixed to the pot cover upper cover 11 by means of buckles or screws, etc., a rotating shaft seat 122 is symmetrically provided at one end of the pot cover lower cover 12, a rotating shaft 13 fixed thereto is provided in the rotating shaft seat 122, one end of the rotating shaft 13 passes through one of the rotating shaft seats 122, and a rotating shaft cover 111 covering the rotating shaft seat 122 is provided on the pot cover upper cover 11. Figure 3 As can be seen in the figure, a second buckle 121 is provided on one end of the lower cover 11 of the pot lid away from the rotating shaft seat 122, and a pot lid handle 14 is also provided on the top surface of the upper cover 11 of the pot lid;

[0057] A support base 31 is provided on the pot body bracket 3. Figure 4As shown), the support seat 31 is provided with a shaft seat 311 inserted between the rotating shaft seat 122. The shaft seat 311 is hollow and has a through hole for the rotating shaft to pass through, so as to realize the hinge connection between the pot cover assembly 1 and the pot body bracket 3. The driving mechanism is provided on this side. The bracket 74 is connected and fixed to the support seat 31 through the horizontal fixing plate 75. The vertical portion 751 and the support sheet 741 are inserted into the shaft seat 311. The driven gear 72 is provided on the rotating shaft 13. The locking mechanism is provided on one end of the pot cover bracket 3 away from the shaft seat 311, as shown Figure 12 As shown, a receiving portion for accommodating the locking mechanism 10 is provided on the body bracket 3, and the receiving portion includes a symmetrically arranged connecting plate 32. The lower end of the connecting plate 32 is provided with a shaft hole, and the lock shaft 1011 is provided in the shaft hole. One end of the spring 102 is against the lock bracket 101, and the other end is against the outer wall of the body bracket 3. The spring 102 is arranged away from the lock shaft 1011. The digital servo 105 is fixed to the outer wall of the body bracket 3. The body bracket 3 is provided with a hole for the first buckle 1012 to extend and be exposed at a position opposite to the first buckle 1012 ( Figure 1 As shown), the first buckle 1012 extends from the hole to the outside of the body bracket 3, and the upper end of the connecting plate 32 adjacent to the digital servo 105 is provided with a connecting shaft groove 33 ( Figures 14 to 16 As shown in FIG, the driving connecting rod 104 is disposed in the connecting shaft groove 33 via a connecting shaft 1042, so that the driving connecting rod 104 is fixedly and rotatably disposed on the connecting plate 32. A cover plate 34 is provided on the connecting shaft groove 33, and the cover plate 34 is fixed to the connecting plate 32 by means of screws or the like, so as to close the notch on the connecting shaft groove 33 and limit the connecting shaft 1042 to prevent it from being separated from the connecting plate 32. The free end of the driving cam 1043 contacts the platform 1014 provided on the lock bracket 101;

[0058] The pot body shell is sleeved on the outside of the pot body bracket 3 and is connected and fixed to the pot body bracket 3 by screws or the like. A lock button hole ( Figure 1 As shown), the main control PCB assembly 9 is arranged on one end of the boiler body shell 4 located at the driving mechanism.

[0059] like Figure 10 As shown, when the pot cover assembly 1 is covered on the pot body bracket 3, the first buckle 1012 and the second buckle 121 are engaged with each other.

[0060] In the present invention, the cross section of the rotating shaft 13 has at least one straight side, for example, forming a D-shape.

[0061] In the present invention, there are three control modes for opening the pot lid assembly 1: 1. remote control; 2. key control; 3. manual control. The working process of these three control modes is described as follows:

[0062] 1. Remote control: Remote control can be performed through a mobile terminal, such as a mobile phone or computer, to wirelessly send a control signal to open the pot lid assembly 1. At this time, after receiving the signal, the main control PCB board 92 sends a start signal to the digital servo 105. The output shaft of the digital servo 105 drives the rocker 106 installed on the shaft to rotate a corresponding angle. When the rocker 106 rotates, it presses the driving plate 1041 provided on the driving connecting rod 104, causing the driving plate 1041 to rotate an angle. The rotation of the driving plate 1041 drives the driving cam 1043 to rotate an angle. The free end of the driving cam 1043 presses the platform 1014 provided on the lock bracket 101, causing the lock bracket 101 to rotate a corresponding angle toward the pot body bracket 101. That is, the lock bracket 101 is driven by the connecting rod 104 to rotate a certain angle around the lock shaft 1011 ( Figure 20 and Figure 21 As shown), at this time, since the lock bracket 101 rotates an angle, the first buckle 1012 on the lock bracket 101 is separated from the second buckle 121 on the pot cover lower cover 12, thereby automatically unlocking and releasing the pot cover assembly 1;

[0063] When the pot cover assembly 1 is released, the main control PCB board 92 receives the feedback signal from the digital servo 105 and sends a control signal to the drive motor 5, driving the motor 5 to rotate clockwise. The output shaft of the drive motor 5 drives the main rotating gear 71 to rotate clockwise, and also drives the rotating arm of the potentiometer 84 connected to the output shaft of the drive motor 5 through the coupling 82 to rotate counterclockwise synchronously. At this time, the rotation of the main rotating gear 71 drives the driven gear 72 to rotate through the synchronous belt 73, and the rotation of the driven gear 72 drives the rotating shaft 13 to rotate clockwise. The rotation of the rotating shaft 13 drives the pot cover assembly 1 to rotate synchronously clockwise. The pot cover assembly 1 rotates clockwise on the pot body bracket 3 through the rotating shaft 13. When the rotating arm of the potentiometer 84 rotates synchronously counterclockwise to its resistance value, the pot cover assembly 1 reaches the maximum open position, the potentiometer 84 sends an electrical signal to the monitoring PCB board assembly 81, and the monitoring PCB board assembly 81 feeds back a signal to the main control PCB board 92. The main control PCB board 92 controls the drive motor 5 to stop rotating, thereby completing the opening action of the pot cover assembly 1.

[0064] 2. Button control: By manually pressing the cover opening button 93, the main control PCB board 92 sends a control signal to the drive motor 5, executing the same process as the remote control to complete the opening action of the pot cover assembly 1.

[0065] 3. Manual control: By manually pressing the lock button 103, the lock bracket 101 is pushed toward the pot body bracket 3, causing it to rotate around the lock shaft 1011. After rotating to a certain angle, the first latch 1012 on the lock bracket 101 is separated from the second latch 121 on the pot lid lower cover 12. At this time, the pot lid handle 14 can be manually grasped to lift the pot lid assembly 1 upward, thereby manually opening the pot lid assembly 1;

[0066] There are three ways to control the locking and closing of the pot lid assembly 1: 1. Remote control; 2. Key control; 3. Manual control. The working process of these three control methods is described as follows:

[0067] 1. Remote control: Remote control can be achieved through a mobile terminal, such as a mobile phone or computer, which wirelessly sends a control signal to lock the pot lid assembly 1. At this time, after receiving the signal, the main control PCB board 92 sends a control signal to the drive motor 5. After receiving the control signal, the drive motor 5 rotates, causing the output shaft of the drive motor 5 to start rotating counterclockwise, driving the main rotating gear 71 fixed on the output shaft to rotate counterclockwise while also driving the rotating arm of the potentiometer 84 connected to the output shaft of the drive motor 5 through the coupling 82 to rotate clockwise synchronously. The rotation of the main rotating gear 71 drives the driven gear 72 to rotate through the synchronous belt 73. The rotation of the driven gear 72 drives the pot cover rotating shaft 13 to rotate counterclockwise. The rotation of the rotating shaft 13 drives the pot cover assembly 1 to rotate synchronously. The pot cover assembly 1 rotates on the pot body bracket 3, so that the second buckle 121 gradually approaches and contacts the first buckle 1012. The inclined surface on the first buckle 1012 drives the lock bracket 101 to rotate. When the second buckle 121 on the pot cover assembly 1 slides over the first buckle 1012, the lock bracket 101 is reset under the reset action of the spring 102, so that the first buckle 1012 is engaged with the second buckle 121, thereby closing the lid and locking it ( Figure 18 and Figure 19 When the resistance of the potentiometer 84 reaches the resistance value when the lid assembly 1 reaches the closed position with the opening of the pot body support 3, a signal is sent to the main control PCB 92. After receiving the signal, the main control PCB 92 controls the drive motor 5 to stop rotating, thus completing the control process of automatically closing and locking the lid.

[0068] 2. Button control: By manually pressing the electric cover button 94, the main control PCB board 92 receives the signal from the cover closing button 94 and sends a control signal to the drive motor 5, executing the same process as the remote control to complete the closing action of the pot cover assembly 1.

[0069] 3. Manual control: By manually pressing down the lid handle 14 of the upper cover 11 of the pot lid, the pot lid assembly 1 is flipped downward. When the pot lid assembly 1 rotates around the rotating shaft 13 and gradually approaches and contacts the first buckle 1012 on the lock bracket 101, the inclined surface on the first buckle 1012 contacts the second buckle 121 on the lower cover 12 of the pot lid, driving the lock bracket 101 to rotate. When the first buckle 1012 contacts and slides over the second buckle 121, the lock bracket 101 is reset due to the reset of the spring 102. At the same time, the first buckle 1012 and the second buckle 121 are engaged with each other, realizing the manual operation of closing the pot lid assembly 1.

[0070] The utility model realizes the automatic opening and locking closure control of the cover assembly by arranging a locking mechanism, a driving mechanism, a cover position monitoring mechanism and a main control PCB assembly, while not affecting the user's manual opening and closing operations, which not only reduces the risk of manual operation but also simplifies the operation.

Claims

1. A cooking appliance lid opening and closing mechanism, characterized in that: include: The locking mechanism (10) comprises a locking bracket (101), a locking button (103), a spring (102), and a digital servo (105); a first buckle (1012) is provided on the locking bracket (101); the locking button (103) is provided on one end surface of the locking bracket (101); the spring (102) is provided on the other end surface of the locking bracket (101); locking shafts (1011) are provided on both sides of the lower end of the locking bracket (101); the digital servo (105) is adjacent to the locking bracket (101); and a rocker (106) is provided on the output shaft of the digital servo (105); A driving mechanism, the driving mechanism comprising a transmission mechanism (7) and a driving motor (5), wherein the driving motor (5) drives the transmission mechanism (7); A cover position monitoring mechanism (8) is provided at the drive motor (5) to monitor the rotation angle of the output shaft of the drive motor (5); A main control PCB assembly (9) includes a main control PCB board (92), and the main control PCB board (92) is connected to a cover position monitoring mechanism (8), a drive motor (5), and a digital servo (105).

2. The cooking appliance lid opening and closing mechanism according to claim 1, characterized in that: The locking mechanism (10) further comprises a driving connecting rod (104), which is arranged between the locking bracket (101) and the digital servo (105) so as to drive the driving connecting rod (104) to rotate in conjunction with the rocker arm (106) when the rocker arm (106) rotates, thereby pressing the locking bracket (101).

3. The cooking appliance cover opening and closing mechanism according to claim 2, characterized in that: The driving connecting rod (104) includes a driving plate (1041), a driving cam (1043) and a connecting shaft (1042). The driving plate (1041) and the driving cam (1043) are respectively arranged on both ends of the connecting shaft (1042), wherein the driving plate (1041) is adjacent to the digital servo (105) and is arranged above the rocker (106), the driving cam (1043) is adjacent to the lock bracket (101), the driving cam (1043) and the connecting shaft (1042) are eccentrically arranged, and the driving cam (1043) includes a fixed end and a free end, the fixed end is connected and fixed to the connecting shaft (1042), and the free end faces the lock bracket (101).

4. The cooking appliance lid opening and closing mechanism according to any one of claims 1 to 3, characterized in that: The transmission mechanism (7) comprises a main rotating gear (71), a driven gear (72) and a synchronous belt (73); the main rotating gear (71) is arranged on the output shaft of the driving motor (5); and the synchronous belt (73) is sleeved on the main transmission gear (71) and the driven gear (72).

5. The cooking appliance lid opening and closing mechanism according to any one of claims 1 to 3, characterized in that: The cover position monitoring mechanism (8) comprises a potentiometer (84) and a monitoring PCB board assembly (81); the potentiometer (84) is arranged on the monitoring PCB board assembly (81) and is connected to the output shaft of the drive motor (5) via a coupling (82); and the monitoring PCB board assembly (81) is connected to the main control PCB board (92).

6. The cooking appliance lid opening and closing mechanism according to claim 5, characterized in that: The cover position monitoring mechanism (8) further comprises a mounting box (83), the mounting box (83) being fixed on the horizontal fixing plate (75), and the potentiometer (84) and the monitoring PCB assembly (81) being fixed on the mounting box (83).

7. The cooking appliance lid opening and closing mechanism according to claim 6, characterized in that: The main control PCB assembly (9) further comprises a panel (91), a main control PCB board (92) is provided with a cover opening button (93) and a cover closing button (94), and the panel (91) is provided with holes for exposing the cover opening button (93) and the cover closing button (94).

8. The cooking appliance lid opening and closing mechanism according to any one of claims 1 to 3, characterized in that: The driving mechanism further comprises a bracket (74), a horizontal fixing plate (75) is provided on the bracket (74), a vertical portion (751) is provided on the horizontal fixing plate (75), a supporting piece (741) is provided at a position corresponding to the bracket (74) and the vertical portion (751), a coaxial first through hole (752) and a second through hole (742) are provided at corresponding positions of the vertical portion (751) and the supporting piece (741), a third through hole (743) is provided at the lower portion of the bracket (74), and the third through hole (743) and the second through hole (742) are located on the same straight line.

9. An electric rice cooker comprising a rice cooker cover assembly (1), a rice cooker body support (3), a rice cooker body shell (4) and an inner pot (2), wherein the rice cooker cover assembly (1) and one end of the rice cooker body support (3) are hingedly connected via a rotating shaft (13), and characterized in that: The cooking appliance lid opening and closing mechanism further comprises the cooking appliance lid opening and closing mechanism as claimed in any one of claims 1 to 8, wherein the driving mechanism is arranged at one end of the pot lid assembly (1) hinged to the pot body bracket (3), the transmission mechanism (7) is connected to the rotating shaft (13) to drive the pot lid assembly (1) to open and close, the locking mechanism (10) is arranged at one end of the pot body bracket (3) away from the rotating shaft (13), and a hole for the first buckle (1012) to extend and be exposed is provided at a position opposite to the pot body bracket (3) and the first buckle (1012). A buckle (1012) extends from the hole to the outside of the pot body bracket (3); a second buckle (121) adapted to the first buckle (1012) is provided on the pot cover assembly (1); the lock bracket (101) is rotatably connected to the pot body bracket (3) via a lock shaft (1011); a spring (102) abuts against the pot body bracket (3); a lock button hole for exposing the lock button (103) is provided on the pot body shell (4); and a main control PCB assembly (9) is provided on the pot body shell (4).

10. The electric rice cooker according to claim 9, characterized in that: The cross section of the rotating shaft (13) has at least one straight side.

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