Door opening assisting device and refrigerator

Abstract

The utility model relates to the technical field of household appliances, and provides a power-assisted door opening device and a refrigerator, the power-assisted door opening device comprises a mounting body, an ejector rod, a driving assembly and a first trigger switch, and the mounting body is provided with a first through hole; the ejector rod is movably connected to the mounting body and suitable for penetrating out of the first through hole. The driving assembly is suitable for driving the ejector rod to be switched between a storage state and an ejection state; the first trigger switch is electrically connected to the driving assembly; in the storage state, the ejector rod can move relative to the driving assembly to trigger the first trigger switch to send out a first trigger signal, and the driving assembly is started based on the first trigger signal; and in the ejection state, the ejector rod is dynamically coupled with the driving assembly. The push rod moves to trigger the first trigger switch, and the door body or a user does not need to directly contact the first trigger switch, so that the mounting body does not need to independently form a through hole for the first trigger switch, the number of holes in the surface of the mounting body is effectively reduced, the assembly process is effectively simplified, and the appearance of the mounting body is beautified.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a power-assisted door opening device and a refrigerator. Background Art

[0002] In the related art, the trigger mechanism of the power-assisted door opening device usually adopts a micro switch, and the refrigerator needs to make a hole at the position corresponding to the micro switch to ensure that the door of the refrigerator can trigger the micro switch.

[0003] This results in a problem that there are many openings on the surface of the refrigerator body corresponding to the door body, which is not aesthetically pleasing and the installation of the power-assisted door opening device is complicated. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a power-assisted door opening device, which triggers a first trigger switch by the movement of a top rod, and the door of the refrigerator or the user does not need to directly contact the first trigger switch, so there is no need to set a through hole on the surface of the mounting body for the first trigger switch, so that the number of openings on the surface of the mounting body is effectively reduced, the assembly process is effectively simplified, and the appearance of the mounting body is beautified.

[0005] The utility model also provides a refrigerator.

[0006] According to the first embodiment of the present invention, the power-assisted door opening device comprises:

[0007] The installation body is provided with a first through hole;

[0008] A push rod, movably connected to the mounting body and adapted to pass through the first through hole;

[0009] A driving assembly, adapted to drive the ejector rod to switch between a stowed state and an ejected state;

[0010] A first trigger switch, electrically connected to the driving assembly;

[0011] In the storage state, the push rod can move relative to the driving assembly to trigger the first trigger switch to send a first trigger signal, and start the driving assembly based on the first trigger signal; in the ejection state, the push rod is dynamically coupled to the driving assembly.

[0012] According to the power-assisted door opening device of the embodiment of the utility model, when it is arranged in the storage state, the door body pushes the push rod to move to trigger the first trigger switch. The door body does not need to directly contact the first trigger switch, and the corresponding mounting body does not need to have a through hole corresponding to the first trigger switch. It is only necessary to have a first through hole corresponding to the push rod. This effectively reduces the number of openings on the surface of the mounting body. When the mounting body is the outer shell of other equipment (such as a refrigerator, a microwave oven, etc.), the assembly process is effectively simplified and the appearance of the mounting body is beautified. When the mounting body is the shell of the power-assisted door opening device itself, the first trigger switch and the push rod are integrated in the mounting body, which reduces the amount of materials when the power-assisted door opening device is installed on other equipment, effectively simplifying the assembly process.

[0013] According to an embodiment of the utility model, the push rod is slidably connected to the mounting body along a linear direction.

[0014] According to an embodiment of the utility model, the first trigger switch is located at the starting end of the push rod along the straight line direction, and in the storage state, the push rod is suitable for moving in the opposite direction along the straight line direction to trigger the first trigger switch.

[0015] According to an embodiment of the utility model, the driving assembly is provided with a moving space, and a limiting protrusion is provided on the top rod corresponding to the moving space. In the storage state, the limiting protrusion is suitable for moving in the moving space.

[0016] According to an embodiment of the utility model, the driving assembly includes a first driving gear, the outer periphery of the first driving gear is provided with adjacent first gear teeth and second gear teeth, the spacing between the first gear teeth and the second gear teeth is greater than the spacing between the remaining gear teeth of the first driving gear, and the spacing between the first gear teeth and the second gear teeth forms the moving space;

[0017] The push rod is provided with a rack, the rack is located at an end of the limiting protrusion close to the starting end of the straight line direction, and the rack is suitable for meshing with the first driving gear.

[0018] According to one embodiment of the utility model, the power-assisted door opening device also includes a second trigger switch, which is electrically connected to the drive assembly. In the ejection state or the storage state, the second trigger switch sends a second trigger signal, and controls the drive assembly to stop based on the second trigger signal.

[0019] According to one embodiment of the utility model, the driving assembly includes a swing arm, a first end of the swing arm is rotatably connected to the mounting body, and a second end of the swing arm swings relative to the first end and is suitable for contacting the second trigger switch.

[0020] According to an embodiment of the utility model, the driving assembly includes a second driving wheel, the outer periphery of the second driving wheel abuts against one side of the second end of the swing arm, and the other side of the second end is suitable for contacting the second trigger switch.

[0021] According to an embodiment of the utility model, when the driving assembly is provided with a first driving gear, the first driving gear is dynamically coupled to the second driving wheel.

[0022] According to an embodiment of the utility model, the driving component further includes a control chip and a comparison circuit, the input end of the comparison circuit is connected to the second trigger switch, the output end of the comparison circuit is electrically connected to the control chip, the comparison circuit is adapted to receive the shutdown time of the second trigger switch and compare it with a preset time, and output a third trigger signal when the shutdown time is greater than or equal to the preset time, and output a fourth trigger signal when the shutdown time is less than the preset time;

[0023] The control chip is adapted to control the drive assembly to start up when receiving the third trigger signal, so as to switch the ejector pin from the ejection state to the storage state.

[0024] A refrigerator according to an embodiment of the second aspect of the utility model comprises:

[0025] The box body is provided with a storage cavity;

[0026] A door body, covering the storage cavity;

[0027] As described above, in the power-assisted door opening device, one of the box body and the door body is the mounting body, and the push rod of the power-assisted door opening device is suitable for pushing the other of the box body or the door body.

[0028] The beneficial effects of the refrigerator according to the embodiment of the utility model are the same as the effective effects of the power-assisted door opening device of the embodiment of the first aspect of the utility model, and will not be repeated here.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a structural schematic diagram of the push rod of the power-assisted door opening device provided by an embodiment of the utility model being in the storage state;

[0032] Figure 2 It is a structural schematic diagram of the push rod of the power-assisted door opening device provided by an embodiment of the utility model being in the ejection state.

[0033] Reference numerals:

[0034] 100, mounting body; 110, first through hole;

[0035] 200, ejector rod; 210, limiting protrusion; 220, rack;

[0036] 300, driving assembly; 310, moving space; 320, first driving gear; 321, first gear teeth; 322, second gear teeth; 330, swing arm; 331, first end; 332, second end; 340, second driving wheel; 350, motor;

[0037] 400, a first trigger switch; 500, a second trigger switch. DETAILED DESCRIPTION

[0038] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0039] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying 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 limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0041] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] Combination Figure 1 and Figure 2 As shown, the power-assisted door opening device according to the embodiment of the first aspect of the utility model includes a mounting body 100, a push rod 200, a driving assembly 300 and a first trigger switch 400. The mounting body 100 is provided with a first through hole 110; the push rod 200 is movably connected to the mounting body 100 and is suitable for passing through the first through hole 110; the driving assembly 300 is suitable for driving the push rod 200 to switch between a storage state and an ejection state; the first trigger switch 400 is electrically connected to the driving assembly 300; in the storage state, the push rod 200 can move relative to the driving assembly 300 to trigger the first trigger switch 400 to send a first trigger signal, and start the driving assembly 300 based on the first trigger signal; in the ejection state, the push rod 200 is dynamically coupled to the driving assembly 300.

[0044] For ease of description, take the example of a power-assisted door opening device installed on a refrigerator body, where the upper cover of the refrigerator body is provided with a door body, wherein the power-assisted door opening device is installed on the body, and the top rod 200 of the power-assisted door opening device faces the door body, and is suitable for pushing the door body under the drive of the driving component 300.

[0045] It should be noted that the power-assisted door opening device can be installed on the cabinet in the form of the outer shell of the refrigerator cabinet as the installation body 100, or the power-assisted door opening device itself is provided with a shell as the installation body 100, and the installation body 100 is fixed to the cabinet.

[0046] When the door cover is installed on the box body, the refrigerator is in the closed state and the power-assisted door opening device is in the storage state ( Figure 1 As shown in the figure, when the user needs to open the door of the refrigerator to take out the items in the storage cavity, the user pushes the door in the direction of the box body (opposite to the straight line direction in the figure). Since a sealing strip is provided between the door body and the box body or the door body itself is deformed under the action of force, the door body pushes the ejector rod 200, and the ejector rod 200 moves to trigger the first trigger switch 400 to send a first trigger signal. The power-assisted door opening device controls the driving component 300 to be power-coupled with the ejector rod 200 based on the first trigger signal. The driving component 300 drives the ejector rod 200 to move in the opposite direction. The end of the ejector rod 200 that moves in the opposite direction and passes through the first through hole 110 gradually moves away from the box body, thereby pushing the door body gradually away from the box body until the ejector rod switches to the ejection state ( Figure 2 As shown), when the door body is connected to the box body through the rotating shaft, one side of the door body gradually moves away from the box body around the rotating shaft.

[0047] According to the power-assisted door opening device of the embodiment of the utility model, the driving component 300 drives the push rod 200 to open the door body, which saves manpower and time and optimizes the user's operating experience; and by being arranged in the storage state, the door body pushes the push rod 200 to move to trigger the first trigger switch 400, and the door body does not need to directly contact the first trigger switch 400, and the corresponding installation body 100 does not need to have a through hole corresponding to the first trigger switch 400, and it is only necessary to have a first through hole 110 corresponding to the push rod 200, so that the number of openings on the surface of the installation body 100 is effectively reduced, and when the installation body 100 is the shell of other equipment (such as a refrigerator, a microwave oven, etc.), the assembly process is effectively simplified and the appearance of the installation body 100 is beautified; when the installation body 100 is the shell of the power-assisted door opening device itself, the first trigger switch 400 and the push rod 200 are integrated in the installation body 100, which reduces the amount of materials when the power-assisted door opening device is installed on other equipment, and effectively simplifies the assembly process.

[0048] Of course, the power-assisted door-opening device of the embodiment of the utility model is not limited to being installed on a refrigerator, but can also be installed on other devices with a door body, such as a microwave oven, an oven, etc.

[0049] In this embodiment, the driving assembly 300 includes a motor 350, a worm gear and a transmission gear set connected in sequence. The rotating shaft of the motor 350 drives the worm gear to rotate, and the worm gear drives the ejector rod 200 to move through the transmission gear set; of course, the driving assembly 300 can also adopt hydraulic drive, pneumatic drive and other forms to drive the ejector rod 200 to switch from the storage state to the ejection state.

[0050] In this embodiment, the power-assisted door opening device is provided with a push rod 200 and a first trigger switch 400 corresponding to the push rod 200. Of course, multiple push rods 200 can also be provided to increase the pushing force of the power-assisted door opening device to adapt to doors of different weights.

[0051] In this embodiment, the first trigger switch 400 is a micro switch. The micro switch requires very little operating force, and only a slight touch or pressure is needed to start or close the switch, which is suitable for occasions that require precise control; and the micro switch is small in size, easy to install, and can be flexibly arranged in a required position, which is suitable for reducing the size of the power-assisted door opening device. Of course, the first trigger switch 400 can also use other switches that can send state switching signals (to achieve switching between the storage state and the ejection state), such as button switches, induction switches, etc.

[0052] In one embodiment, in combination Figure 1 and Figure 2 As shown, the push rod 200 is slidably connected to the mounting body 100 along a straight line direction. In the storage state, the push rod 200 is suitable for moving in the opposite direction along the straight line direction to trigger the first trigger switch 400. The push rod 200 always moves in a straight line direction during the movement, and the movement direction is the same as the extension direction of the push rod 200, so that the push rod 200 can withstand a greater ejection force without being damaged during the movement, effectively improving the service life of the power-assisted door opening device.

[0053] In this embodiment, taking the installation of the power-assisted door opening device on a refrigerator as an example, when the door cover of the refrigerator is set on the box body, the push rod 200 of the power-assisted door opening device is in a storage state. When the power-assisted door opening device is installed on the refrigerator, the straight line direction can be set perpendicular to the surface of the door body, so that at the beginning stage of the push rod 200 pushing out the installation body 100, the push-out force of the push rod 200 is perpendicular to the surface of the door body, avoiding the push-out force from forming a component force on the surface of the door body and reducing the door opening efficiency. Of course, the angle relationship between the door body and the straight line direction can also be adjusted according to actual layout requirements.

[0054] In another embodiment, the push rod 200 can be rotatably connected to the mounting body 100, wherein the extension direction of the push rod 200 is perpendicular to the axis of the rotational movement of the push rod 200, and one end of the push rod 200 rotates in a linear direction to form a certain displacement, so as to push the door body to move and achieve the effect of assisting in opening the door.

[0055] According to one embodiment of the utility model, combined Figure 1 As shown, in the storage state, the first trigger switch 400 is located at the starting end of the push rod 200 in the straight direction. The movement form of the push rod 200 is effectively adapted to be pushed out in the straight direction, and the volume of the power-assisted door opening device in the straight direction is extended to reduce the space volume required in the direction perpendicular to the straight line. It can be understood that when the power-assisted door opening device is installed in a refrigerator, an oven, etc., a storage cavity of the refrigerator or a storage cavity of the oven is correspondingly provided in the direction perpendicular to the straight line. Therefore, the volume of the storage cavity of the device can be effectively increased, and when the volume of the storage cavity of the device remains unchanged, the overall volume of the device can also be effectively reduced.

[0056] Of course, the first trigger switch 400 may also be disposed on the side of the push rod 200 along the straight direction, and the push rod 200 may extend a protrusion correspondingly to press the first trigger switch 400 .

[0057] In another embodiment, in combination with the above, when the push rod 200 is rotatably connected to the mounting body 100 , the first trigger switch 400 is correspondingly located at the end of the rotation path of the push rod 200 .

[0058] According to one embodiment of the utility model, combined Figure 1 and Figure 2 As shown, the driving assembly 300 is provided with a moving space 310, and a limiting protrusion 210 is provided on the top rod 200 corresponding to the moving space 310. In the storage state, the limiting protrusion 210 is suitable for moving in the moving space 310. The moving space 310 limits the movement of the limiting protrusion 210 within a certain range. In the storage state, the moving space 310 ensures that the top rod 200 has a certain range of movement, and can also effectively prevent the top rod 200 from moving in the installation body 100. Of course, the moving space 310 can also be provided on the top rod 200, and the limiting protrusion 210 can be provided on the driving assembly 300 accordingly.

[0059] In this embodiment, the limiting protrusion 210 is located on one side of the top rod 200 and below the top rod 200 as shown in the figure, so that the component forming the movable space 310 corresponding to the limiting protrusion 210 is located below the top rod 200; of course, based on the actual installation and space arrangement requirements, the position of the limiting protrusion 210 on the top rod 200 can be adaptively adjusted, such as being set on the front and rear sides (perpendicular to the paper direction) of the top rod 200 as shown in the figure, and the position of the movable space 310 can be adjusted accordingly.

[0060] According to one embodiment of the utility model, combined Figure 1 and Figure 2As shown, the driving assembly 300 includes a first driving gear 320, and the outer periphery of the first driving gear 320 is provided with adjacent first gear teeth 321 and second gear teeth 322, the spacing between the first gear teeth 321 and the second gear teeth 322 is greater than the spacing between the remaining gear teeth of the first driving gear 320, and the interval between the first gear teeth 321 and the second gear teeth 322 forms a moving space 310; the top rod 200 is provided with a rack 220, and the rack 220 is located at one end of the limiting protrusion 210 close to the starting end of the straight line direction, and the rack 220 is suitable for engaging with the first driving gear 320.

[0061] In this embodiment, combined with Figure 1 As shown, in the storage state, the limiting protrusion 210 of the push rod 200 can move in the moving space 310 between the first gear tooth 321 and the second gear tooth 322, and the push rod 200 moves in the opposite direction in the linear direction to trigger the first trigger switch 400 to send a first trigger signal. The motor 350 controls the rotation of the motor 350 shaft in response to the first trigger signal. The motor 350 shaft drives the first drive gear 320 to rotate through the worm and the gear set (clockwise as shown in the figure). During the rotation process, the second gear tooth 322 of the first drive gear 320 first contacts the limiting protrusion 210 to drive the push rod 200 to move in the linear direction. When the limiting protrusion 210 is disengaged from the second gear tooth 322, the rack 220 of the push rod 200 engages with the gear tooth to realize the power coupling between the first drive gear 320 and the push rod 200. As the first drive gear 320 rotates, the push rod 200 extends out of the first through hole 110 in the linear direction until the first drive gear 320 stops moving.

[0062] By setting the first driving gear 320 to cooperate with the rack 220, the transmission efficiency between the driving assembly 300 and the top rod 200 is improved, and no slippage occurs between the two, which effectively improves the transmission accuracy and transmits torque smoothly; the gear transmission has low noise and vibration during operation, and runs smoothly and reliably; and the number of teeth of the first driving gear 320 and the rack 220 can be adjusted according to the transmission accuracy or speed requirements, and the adaptability is better.

[0063] In this embodiment, the motor 350 and the first drive gear 320 are connected via a worm and a gear set. The transmission ratio between the motor 350 and the first drive gear 320 can be adjusted by adjusting the number of gears and the meshing relationship of the gear set, thereby effectively adapting to different speed requirements of the first drive gear 320.

[0064] According to one embodiment of the utility model, combined Figure 1 and Figure 2 As shown, the power-assisted door opening device also includes a second trigger switch 500, which is electrically connected to the drive assembly 300. In the ejection state or the storage state, the second trigger switch 500 sends a second trigger signal, and controls the drive assembly 300 to stop based on the second trigger signal.

[0065] Combination Figure 1 As shown, the push rod 200 of the power-assisted door opening device moves toward the starting end in the straight direction under the pressure of the door body, pressing the first trigger switch 400 to make it send out a first trigger signal, and the driving component 300 starts in response to the first trigger signal, driving the push rod 200 to move in the straight direction. During the movement of the push rod 200, it gradually pushes the door body to achieve power-assisted door opening.

[0066] Until the ejector rod 200 reaches the ejection state, the second trigger switch 500 is triggered, the second trigger switch 500 sends a second trigger signal, the driving assembly 300 stops moving based on the second trigger signal, and the ejector rod 200 remains motionless in the ejection state.

[0067] In this embodiment, the second trigger switch 500 is a travel switch, including two states, namely a normally closed state and a normally open state. Any one of the normally closed state and the normally open state can be used as a second trigger signal, which can correspond one-to-one with the storage state and the ejection state of the ejector rod 200.

[0068] Of course, the second trigger switch 500 may also be other switches capable of sending state switching signals, such as a button switch, an induction switch, etc.

[0069] According to one embodiment of the utility model, combined Figure 1 and Figure 2 As shown, the driving assembly 300 includes a swing arm 330 , a first end 331 of the swing arm 330 is rotatably connected to the mounting body 100 , and a second end 332 of the swing arm 330 swings relative to the first end 331 and is suitable for contacting the second trigger switch 500 .

[0070] In this embodiment, the second end 332 of the swing arm 330 swings within a certain range relative to the first end 331, and the extreme position of the swing corresponds to contacting the second trigger switch 500, corresponding to the ejection state or the storage state of the ejector 200. The swing arm 330 has a simple and reliable structure, and by adjusting the length between the first end 331 and the second end 332 to adapt to the second trigger switch 500 at different positions, the space layout requirements of the power-assisted door opening device are met.

[0071] In the present embodiment, a swing arm 330 is provided, and a second trigger switch 500 is provided on one side of the swing arm 330. When the swing arm 330 swings to the limit position corresponding to the side where the second trigger switch 500 is located, the second trigger switch 500 is triggered to send a second trigger signal. Only one second trigger switch 500 can meet the stopping requirements of the ejector 200 in the ejection state and the storage state, thereby effectively reducing the manufacturing cost of the power-assisted door opening device. Of course, independent second trigger switches 500 can also be provided on both sides of the swing arm 330, and each second trigger switch 500 corresponds to an independent control signal, which is used to control the drive assembly 300 to realize that the ejector 200 stops in the ejection state or stops in the storage state.

[0072] According to one embodiment of the utility model, combined Figure 1 and Figure 2 As shown, the driving assembly 300 includes a second driving wheel 340 , the outer periphery of the second driving wheel 340 abuts against one side of the second end 332 of the swing arm 330 , and the other side of the second end 332 is suitable for contacting the second trigger switch 500 .

[0073] In this embodiment, the outer periphery of the second driving wheel 340 has a continuous first action position and a second action position, and one side of the second end 332 of the swing arm 330 abuts against the outer periphery of the second driving wheel 340. As the second driving wheel 340 rotates, the abutting position of the swing arm 330 and the second driving wheel 340 switches from the first action position to the second action position, and the swing arm 330 swings, and gradually presses against the second trigger switch 500 during the swinging process until it sends out a second trigger signal, triggering the driving assembly 300 to stop moving.

[0074] The abutment between the second drive wheel 340 and the swing arm 330 makes it unnecessary to set up a separate drive component for the swing arm 330 itself, and both the first drive gear 320 and the second drive wheel 340 are driven by the motor 350 of the drive assembly 300, which effectively ensures the transmission accuracy and improves the operation accuracy of the power-assisted door opening device.

[0075] In this embodiment, the first action position is the circular wheel surface on the outer periphery of the second driving wheel 340, and the second action position is formed by the circular wheel surface on the outer periphery of the second driving wheel 340 being recessed on the center side. Two second action positions are arranged on the wheel surface of the second driving wheel 340, corresponding to the storage state and the ejection state of the ejector rod 200 respectively; of course, the second action position can also be set to be formed by the circular wheel surface on the outer periphery of the second driving wheel 340 being convex away from the center side, to ensure that the swing arm 330 swings during the switching process between the first action position and the second action position, so as to trigger the second trigger switch 500.

[0076] In other embodiments, the swing arm 330 can also be driven separately, such as by setting an independent driving component on the rotating shaft of the swing arm 330 or transmitting the output of the motor 350 shaft of the motor 350 of the driving assembly 300 to the rotating shaft of the swing arm 330 through a transmission component to achieve the swinging effect of the swing arm 330. Setting the drive of the swing arm 330 separately is beneficial to reducing the overall coupling of the power-assisted door opening device and reducing maintenance costs.

[0077] In this embodiment, the swing arm 330 is arranged below the driving assembly 300, and the second end 332 of the swing arm 330 is arranged higher than the first end 331. Therefore, the second end 332 has a tendency to move downward under the action of gravity. Accordingly, an elastic member is arranged on the side of the first end 331. The elastic member can make the second end 331 of the swing arm 330 always fit the outer periphery of the second driving wheel 340, so as to prevent the second end 332 of the swing arm 330 from pressing the second trigger switch 500 under the action of gravity, causing the second trigger switch 500 to be triggered by mistake, thereby affecting the switching process between the storage state and the ejection state of the power-assisted door opening device. The elastic member can be a component with elastic deformation ability such as a spring or a silicone sleeve.

[0078] According to one embodiment of the utility model, combined Figure 1 and Figure 2 As shown, when the driving assembly 300 is provided with a first driving gear 320, the first driving gear 320 is power-coupled with the second driving wheel 340. The first driving gear 320 and the second driving wheel 340 are driven by the same motor 350 of the driving assembly 300, so as to avoid the first driving gear 320 for controlling the movement of the ejector 200 and the second driving wheel 340 for controlling the stop of the ejector 200 having a rotation angle difference due to different driving, resulting in the ejector 200 not stopping in the storage state or the ejection state, thereby affecting the operation accuracy of the power-assisted door opening device.

[0079] In this embodiment, the first drive gear 320 and the second drive wheel 340 are coaxially arranged to reduce the volume occupied by the power-assisted door opening device in the upper and lower directions as shown in the figure; of course, the first drive gear 320 and the second drive wheel 340 can also be arranged to be non-coaxial to ensure that the two are connected to the same motor 350 through a transmission component to achieve power coupling.

[0080] According to one embodiment of the utility model, the drive component 300 also includes a control chip and a comparison circuit, the input end of the comparison circuit is connected to the second trigger switch 500, and the output end of the comparison circuit is electrically connected to the control chip. The comparison circuit is suitable for receiving the shutdown time of the second trigger switch 500 and comparing it with the preset time, and outputting a third trigger signal when the shutdown time is greater than or equal to the preset time, and outputting a fourth trigger signal when the shutdown time is less than the preset time; the control chip is suitable for controlling the drive component 300 to start when receiving the third trigger signal, so as to switch the ejector 200 from the ejection state to the storage state.

[0081] In this embodiment, when the ejector rod 200 reaches the ejection state, the second trigger switch 500 triggers and sends a second trigger signal, controls the drive component 300 to drive the ejector rod 200 to stop, and the control chip starts to accumulate the downtime. When the downtime reaches the preset time, the comparison circuit outputs a third trigger signal. The control chip controls the drive component 300 to move in the opposite direction based on the third trigger signal, driving the ejector rod 200 to move toward the starting end in the straight direction until it switches to the storage state.

[0082] In this embodiment, a preset time length is set so that the push rod 200 remains in the ejected state for at least the preset time length, thereby avoiding the problem of the door body rebounding during the process of being ejected by the power-assisted door opening device, resulting in the storage cavity of the box being covered again; and the push rod 200 switched to the storage state will not interfere with the user's taking of items, effectively improving the convenience and aesthetics of the equipment installed with the power-assisted door opening device.

[0083] In this embodiment, the preset time length can be set by the user, and the value range of the preset time length is zero to ten seconds. Of course, based on the different connection relationships between the door body and the box body, the preset time length can be adaptively adjusted based on the rebound force between the two to ensure the door opening effect of the top rod 200 of the power-assisted door opening device.

[0084] In this embodiment, the third trigger signal may be one of a high level signal and a low level signal output by the comparison circuit, and the corresponding fourth trigger signal may be the other one of the high level signal and the low level signal output by the comparison circuit.

[0085] According to the second aspect of the present invention, the refrigerator comprises a cabinet, a door and a power-assisted door-opening device as in the above embodiment; the cabinet is provided with a storage cavity; the door cover is provided in the storage cavity; one of the cabinet and the door is an installation body 100, and the top rod 200 of the power-assisted door-opening device is suitable for pushing the other of the cabinet or the door.

[0086] The beneficial effects of the refrigerator according to the embodiment of the utility model are the same as the effective effects of the power-assisted door opening device of the embodiment of the first aspect of the utility model, and will not be repeated here.

[0087] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A power-assisted door opening device, characterized in that: include: The installation body is provided with a first through hole; A push rod, movably connected to the mounting body and adapted to pass through the first through hole; A driving assembly, adapted to drive the ejector rod to switch between a stowed state and an ejected state; A first trigger switch, electrically connected to the driving assembly; In the storage state, the push rod can move relative to the driving assembly to trigger the first trigger switch to send a first trigger signal, and start the driving assembly based on the first trigger signal; In the ejection state, the ejector rod is dynamically coupled to the drive assembly.

2. The power-assisted door opening device according to claim 1, characterized in that: The push rod is slidably connected to the mounting body along a linear direction.

3. The power-assisted door opening device according to claim 2, characterized in that: The first trigger switch is located at the starting end of the push rod along the straight line direction. In the storage state, the push rod is suitable for moving in the reverse direction along the straight line direction to trigger the first trigger switch.

4. The power-assisted door opening device according to claim 3, characterized in that: The driving assembly is provided with a moving space, and a limiting protrusion is provided on the top rod corresponding to the moving space. In the storage state, the limiting protrusion is suitable for moving in the moving space.

5. The power-assisted door opening device according to claim 4, characterized in that: The driving assembly comprises a first driving gear, wherein the outer periphery of the first driving gear is provided with adjacent first gear teeth and second gear teeth, the spacing between the first gear teeth and the second gear teeth is greater than the spacing between the remaining gear teeth of the first driving gear, and the spacing between the first gear teeth and the second gear teeth forms the moving space; The push rod is provided with a rack, the rack is located at an end of the limiting protrusion close to the starting end of the straight line direction, and the rack is suitable for meshing with the first driving gear.

6. The power-assisted door opening device according to any one of claims 1 to 5, characterized in that: The power-assisted door opening device also includes a second trigger switch, which is electrically connected to the drive assembly. In the ejection state or the storage state, the second trigger switch sends a second trigger signal, and the drive assembly is controlled to stop based on the second trigger signal.

7. The power-assisted door opening device according to claim 6, characterized in that: The driving assembly includes a swing arm, a first end of which is rotatably connected to the mounting body, and a second end of the swing arm swings relative to the first end to contact the second trigger switch.

8. The power-assisted door opening device according to claim 7, characterized in that: The driving assembly includes a second driving wheel, the outer periphery of the second driving wheel abuts against one side of the second end of the swing arm, and the other side of the second end is suitable for contacting the second trigger switch.

9. The power-assisted door opening device according to claim 8, characterized in that: When the driving assembly is provided with a first driving gear, the first driving gear is dynamically coupled to the second driving wheel.

10. The power-assisted door opening device according to claim 6, characterized in that: The driving component further includes a control chip and a comparison circuit, wherein an input end of the comparison circuit is connected to the second trigger switch, and an output end of the comparison circuit is electrically connected to the control chip, and the comparison circuit is adapted to receive the shutdown time length of the second trigger switch and compare it with a preset time length, and output a third trigger signal when the shutdown time length is greater than or equal to the preset time length, and output a fourth trigger signal when the shutdown time length is less than the preset time length; The control chip is adapted to control the drive assembly to start up when receiving the third trigger signal, so as to switch the ejector pin from the ejection state to the storage state.

11. A refrigerator, characterized in that: include: The box body is provided with a storage cavity; A door body, covering the storage cavity; According to the power-assisted door opening device as described in any one of claims 1 to 10, one of the box body and the door body is the mounting body, and the push rod of the power-assisted door opening device is suitable for pushing the other of the box body or the door body.

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