Locking device, kitchen appliance and method for using the kitchen appliance

Abstract

The present invention relates to a locking device, a kitchen appliance and a method for using the kitchen appliance, which includes a housing, a pressure block, a pull rod, a motor, a position switch, a current detection module and a control panel, wherein the pressure block is rotationally connected to the housing, one end of the pull rod is directly or indirectly rotationally connected to the pressure block, the motor can drive the pull rod to reciprocate, the current detection module and the position switch are both electrically connected to the control panel, the pull rod can trigger the position switch, the current detection module can detect the load change of the motor, and the control panel can control the working state of the motor according to the signals of the current detection module and the position switch. The present invention improves the cup cover detection structure of the kitchen appliance, increases the service life of the kitchen appliance, and improves the use experience of consumers.

Description

Technical Field

[0001] The present invention relates to the field of kitchen appliances, and in particular to a locking device, a kitchen appliance and a method for using the kitchen appliance. Background Art

[0002] Kitchen appliances with stirring functions, such as food processors, juicers, soymilk makers, blenders and wall breakers, mainly include a cup body, a cup lid, a locking device and a detection switch, wherein the detection switch is used to detect whether the cup lid is closed. After the detection switch detects that the cup lid is closed, the locking device locks the cup lid and the kitchen appliance works normally. If the detection switch does not detect that the cup lid is closed, the kitchen appliance does not work, thereby preventing the kitchen appliance from causing harm to consumers.

[0003] At present, some kitchen appliances are equipped with a detection switch at the opening of the cup body, and the detection switch is pressed by the cup lid to detect the cup lid. However, the detection switch is protruding from the opening of the cup body, which is easily damaged by human unintentional damage or damaged when the kitchen appliance falls, resulting in more maintenance, short service life, and poor consumer experience. Therefore, the existing technology needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to improve the cup cover detection structure of the kitchen appliance, thereby increasing the service life of the kitchen appliance and improving the user experience of consumers.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A locking device includes a shell, a pressure block, a pull rod, a motor, a position switch, a current detection module and a control board, the pressure block is rotationally connected to the shell, one end of the pull rod is directly or indirectly rotationally connected to the pressure block, the motor can drive the pull rod to reciprocate, the current detection module and the position switch are both electrically connected to the control board, the pull rod can trigger the position switch, the current detection module can detect the load change of the motor, and the control board can control the working state of the motor according to the signals of the current detection module and the position switch.

[0007] In a preferred embodiment, a screw rod is further included, and the screw rod is threadedly connected to the pull rod, and the motor can drive the screw rod to rotate.

[0008] In a preferred embodiment, the fixed end of the motor is rotatably connected to the housing, and the pull rod is directly rotatably connected to the pressure block.

[0009] In a preferred embodiment, the position switch is a travel switch or a proximity switch.

[0010] In a preferred embodiment, the control board includes a control chip and a drive circuit for driving the motor, the control chip is electrically connected to the drive circuit, the input end of the current detection module is electrically connected to the drive circuit, and the output end of the current detection module is electrically connected to the control chip.

[0011] A kitchen appliance comprises the above locking device, and also comprises a cup body and a cup cover, wherein the cup cover and the cup body are rotatably connected, the shell is fixed relative to the cup body, and the pressing block can abut against the cup cover or the cup body.

[0012] A method for using a kitchen appliance comprises the following steps:

[0013] S 10 The motor is turned on and drives the pull rod to move from the initial position;

[0014] S20: before the pull rod moves to the first position point, the current detection module detects the normal working current of the motor, and the position switch is in the first state;

[0015] S30 The pull rod moves to the first position point. At this time, the position switch is in the second state, the pressing block abuts against the cup cover, the current detection module detects the stall current of the motor, the control board controls the motor to stop working, and the pull rod stops moving; or, the pressing block does not abut against the cup cover, the current detection module detects the normal working current of the motor, and the motor continues to drive the pull rod to move;

[0016] S40 When the pull rod continues to move to the second position point, the position switch is in the first state, the pressure block is in contact with the cup body, and the current detection module detects the stall current of the motor. At this time, the control board controls the motor to reverse, and the motor drives the pull rod to return to the initial position point.

[0017] In a preferred implementation, the first state is a triggered state, and the second state is a non-triggered state, or the first state is a non-triggered state, and the second state is a triggered state.

[0018] The beneficial effects of the present invention are:

[0019] The present invention realizes the detection of the cup cover through a current detection module and a position switch triggered by a pull rod. The current detection module can detect the magnitude of the current. Since the stall current of the motor is greater than the normal working current of the motor, although the motor is in a stalled state when the pressure block presses the cup cover and when the cup body is pressed, the position of the pull rod is different at this time, and thus can be distinguished by the pull rod triggering the position switch and the pull rod not triggering the position switch. The locking device of the present invention can be completely built into the cup body to prevent accidental external damage, thereby increasing the service life and improving the use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is an axonometric view of a locking device according to an embodiment of the present invention;

[0022] Figure 2 is an exploded view of a locking device according to an embodiment of the present invention;

[0023] Figure 3 is an axonometric view of a kitchen appliance according to an embodiment of the present invention;

[0024] Figure 4 It is a working principle diagram of a kitchen appliance according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the present invention can be understood intuitively and figuratively, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0026] In the description of the present invention, if it involves a description of orientation, such as "upper", "lower", "front", "back", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0027] In the description of the present invention, if "several" is involved, it means one or more, if "multiple" is involved, it means more than two, if "greater than", "less than" or "exceed" is involved, it should be understood as not including the number itself, if "above", "below" or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In addition, unless otherwise defined, the technical terms and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art. The terms used in the present invention are only for describing specific embodiments, not for limiting the present invention.

[0029] Reference Figure 1 and Figure 2 , Figure 1 is an axonometric view of a locking device 3 according to an embodiment of the present invention, Figure 2 It is an exploded view of a locking device 3 according to an embodiment of the present invention. The locking device 3 of this embodiment includes a shell 31, a motor 32, a first gear 33, a pull rod 34, a screw 35, a position switch 36, a pressure block 37, a packaging shell 38, a current detection module (not shown) and a control board (not shown). The first gear 33 is fixed on the output shaft of the motor 32, and the first gear 33 is meshed with a second gear 351 arranged at the lower end of the screw 35, wherein the pitch circle diameter of the first gear 33 is smaller than the pitch circle diameter of the second gear 351, thereby decelerating the rotational motion of the motor 32 and transmitting it to the screw 35. In this embodiment, the second gear 351 is a part of the screw 35.

[0030] The outer surface of the middle and upper part of the screw rod 35 is provided with a thread (not shown), and the upper part of the screw rod 35 is inserted into the pull rod 34 and is threadedly matched with the pull rod 34. The packaging shell 38 includes a left shell (not shown) and a right shell (not shown). After the left shell and the right shell of the packaging shell 38 are spliced ​​and fixed, a guide groove 382 is formed, and the pull rod 34 is placed in the guide groove 382, ​​and the pull rod 34 can slide in the guide groove 382. A limit block 341 is provided on the outer side of the pull rod 34, and the limit block 341 cooperates with a limit groove (not shown) provided on the side wall of the guide groove 382. The limit groove is provided along the axial direction of the guide groove 382, ​​and the limit block 341 cooperates with the limit groove to prevent the pull rod 34 from rotating in the guide groove 382.

[0031] In summary, driven by the motor 32 , the pull rod 34 can perform linear reciprocating motion along the guide groove 382 .

[0032] The upper end of the pull rod 34 is directly rotatably connected to the pressure block 37, and the pressure block 37 is also rotatably connected to the shell 31. A accommodating chamber 311 is provided in the shell 31, and the packaging shell 38 is placed in the accommodating chamber 311. A rotating shaft 381 is provided at the lower end of the packaging shell 38. The rotating shaft 381 is clamped in the clamping groove 312 located in the accommodating groove 311 and can rotate relative to the shell 31. Therefore, when the pull rod 34 makes a linear reciprocating motion in the guide groove 382, ​​the pressure block 37 can rotate relative to the shell 31 driven by the pull rod 34.

[0033] A position switch 36 is also provided on one side of the limit groove. In the present embodiment, the position switch 36 is a travel switch. When the pull rod 34 makes a linear reciprocating motion along the guide groove 382, ​​the position switch 36 can be triggered by the limit block 341. Thus, the rotation angle of the pressure block 37 relative to the shell 31 can be detected by detecting the position of the pull rod 34.

[0034] The current detection module can detect the current of the motor. The current detection module and the position switch 36 are both electrically connected to the control board, wherein the control board includes a control chip and a drive circuit for driving the motor 32. The input end of the current detection module is electrically connected to the drive circuit, and the output end of the current detection module is electrically connected to the control chip. The control chip controls the motor 32 to rotate forward, reverse or stop according to the signal of the current detection module and the opening and closing of the position switch 36.

[0035] In another embodiment, the packaging shell 38 can also be directly fixed relative to the shell 31, and the upper end of the pull rod 34 is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the pressure block 37, thereby also driving the pressure block 37 to rotate relative to the shell 31.

[0036] In another embodiment, the motor 32 may also drive the pull rod 34 to reciprocate via a gear and rack structure.

[0037] Reference Figure 2 and Figure 3 , Figure 3 It is an axonometric diagram of a kitchen appliance according to an embodiment of the present invention. The kitchen appliance according to this embodiment includes a base 1, a container 2 and a locking device 3. The locking device 3 is fixed to the base 1. The container 2 is detachably fixed to the base 1. The base 1 includes a cup cover 21 and a cup body 22. The cup cover 21 and the cup body 22 are rotatably connected, and the cup cover 21 can be locked by the locking device 3.

[0038] Specifically, the kitchen appliance may be a food processor, a juicer, a soymilk maker, a blender, a wall breaking machine or other appliance with a blending function.

[0039] Also refer to Figure 4 , Figure 4 1 is a working principle diagram of a kitchen appliance according to an embodiment of the present invention. The method of using the kitchen appliance is as follows:

[0040] S 10, the motor 32 is turned on, and the motor 32 drives the pull rod 34 to move from the initial position point;

[0041] S20, before the pull rod 34 moves to the first position point, the current detection module detects the normal working current of the motor 32, and the position switch 36 is in the first state;

[0042] S30, the pull rod 34 moves to the first position point, at which time, the position switch 36 is in the second state, the pressing block 37 abuts against the cup cover 21, the current detection module detects the stall current of the motor 32, the control board controls the motor 32 to stop rotating, and the pull rod 34 stops moving; or, the pressing block 37 does not abut against the cup cover 21, the current detection module detects the normal working current of the motor 32, and the motor 32 continues to drive the pull rod 34 to move;

[0043] S40, when the pull rod 34 continues to move to the second position point, the position switch 36 is in the first state, the pressure block 37 is in contact with the cup body 22, and the current detection module detects the stall current of the motor. At this time, the control board controls the motor to reverse, and the motor 32 drives the pull rod 34 to return to the initial position point.

[0044] Among them, the first position point of the pull rod 34 is the position of the pull rod 34 when the pressing block 37 presses the cup cover 21, that is, the cup cover 21 is normally closed at this time; the second position point of the pull rod 34 is the position of the pull rod 34 when the pressing block 37 presses the cup body 22, that is, the cup cover 21 is not closed at this time.

[0045] The first state of the position switch 36 is a triggered state, and the second state is a non-triggered state, or the first state of the position switch 36 is a non-triggered state, and the second state is a triggered state. In this embodiment, the setting of the position switch 36 belongs to the latter.

[0046] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments, and technicians in the relevant field can make various equivalent modifications or substitutions without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A locking device, characterized in that: It includes a shell, a pressure block, a pull rod, a motor, a position switch, a packaging shell, a current detection module and a control board. The pressure block is rotatably connected to the shell, one end of the pull rod is directly or indirectly rotatably connected to the pressure block, the motor can drive the pull rod to reciprocate, the current detection module and the position switch are both electrically connected to the control board, the pull rod can trigger the position switch, the current detection module can detect the load change of the motor, and the control board can control the working state of the motor according to the signals of the current detection module and the position switch; wherein, The motor drives the pull rod to move from an initial position point, and before the pull rod moves to a first position point, the current detection module detects a normal working current of the motor, and the position switch is in a first state; When the pull rod moves to the first position point, the position switch is in the second state, the pressing block abuts against the cup cover, the current detection module detects the stall current of the motor, the control board controls the motor to stop working, and the pull rod stops moving; or, the pressing block does not abut against the cup cover, the current detection module detects the normal working current of the motor, and the motor continues to drive the pull rod to move; When the pull rod continues to move to the second position point, the position switch is in the first state, the pressure block abuts against the cup body, and when the current detection module detects the stall current of the motor, the control board controls the motor to reverse, and the motor drives the pull rod to return to the initial position point; The first position point of the pull rod is the position of the pull rod when the pressing block presses the cup cover, at which time the cup cover is normally closed; the second position point of the pull rod is the position of the pull rod when the pressing block presses the cup body, at which time the cup cover is not closed; wherein, One of the first state and the second state is a triggered state, and the other is a non-triggered state; The packaging shell includes a left shell and a right shell, which cooperate to form a guide groove. The groove wall of the guide groove is provided with a limit groove, and the limit groove extends along the axial direction of the guide groove. The pull rod is slidably installed in the guide groove, and a limit block is provided on the outer side of the pull rod. The limit block extends into the limit groove to prevent the pull rod from rotating relative to the packaging shell.

2. The locking device according to claim 1, characterized in that: The locking device also includes a screw rod, which is threadedly connected to the pull rod, and the motor can drive the screw rod to rotate.

3. The locking device according to claim 2, characterized in that: The fixed end of the motor is rotatably connected to the housing, and the pull rod is directly rotatably connected to the pressing block.

4. The locking device according to claim 1, characterized in that: The position switch is a travel switch or a proximity switch.

5. The locking device according to claim 1, characterized in that: The control board includes a control chip and a drive circuit for driving the motor, the control chip is electrically connected to the drive circuit, the input end of the current detection module is electrically connected to the drive circuit, and the output end of the current detection module is electrically connected to the control chip.

6. A kitchen appliance, characterized in that: It comprises the locking device as claimed in any one of claims 1 to 5, and also comprises a cup body and a cup cover, wherein the cup cover and the cup body are rotatably connected, the shell is fixed relative to the cup body, and the pressing block can abut against the cup cover or the cup body.

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