An invisible door handle on a refrigerator door

Abstract

The present invention discloses an invisible door handle on a refrigerator door, characterized in that the invisible door handle comprises a flat plate portion and a columnar handle portion constituting an annular body, a touch switch is respectively arranged on the flat plate portion and the columnar handle portion, a mounting matching end portion connected to the refrigerator door is respectively arranged at the connecting portion of the flat plate portion and the columnar handle portion, a rotating shaft mounting hole and an output shaft mounting hole of a manual drive motor are respectively arranged at the mounting matching end portion, the rotating shaft mounting hole is hinged to the refrigerator door body through the rotating shaft, the output shaft mounting hole of the handle drive motor is matched with the output shaft of the handle drive motor, the handle drive motor is connected to the refrigerator door body through a bracket, the outer surface of the flat plate face portion is flush with the outer surface of the refrigerator door body when the refrigerator door body is closed, and the touch switch and the handle drive motor are respectively connected to the control circuit of the refrigerator. The invisible door handle has beautiful appearance, simple structure, convenient operation, easy processing and manufacturing, and easy automatic cleaning of the door handle.

Description

Technical Field

[0001] The invention relates to the technical field of structural construction of furniture and household appliance door handles, and in particular to an invisible door handle used on a refrigerator door. Background Art

[0002] As people's living standards improve, the requirements for furniture environment are getting higher and higher; in addition to the partition function, traditional home appliance doors also need to have certain decorative functions; at present, young people prefer simple and bright styles, and the overall appearance of home appliances should be simple and generous; but traditional home appliances such as refrigerator doors always have protruding handles, which makes the overall home appliances not simple and fashionable; in addition, the handles protrude from the door panels, which are easy to hook clothes when people pass by, causing inconvenience to walking, especially for families with children, and there are greater safety hazards; in addition, the invisible door handles of traditional home appliances must leave a large gap between the double door panels to put the hand into the groove on the side or bottom edge, so as to open and close the door panels smoothly, but the large gap will also directly affect the appearance of the home appliance. At the same time, in the structure of the double-opening refrigerator door, due to the gap between the two doors, it is necessary to add a sealing structure to make up for the gap in the middle, which will increase the complexity of the refrigerator door body and reduce the sealing effect of the refrigerator door body. Therefore, it is necessary to design a refrigerator door with invisible door handles that is both beautiful and simple in structure. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and to provide an invisible door handle for a refrigerator door which has beautiful appearance, simple structure, convenient operation and easy automatic cleaning of the door handle.

[0004] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical scheme: an invisible door handle on a refrigerator door, the invisible door handle includes a flat plate portion and a columnar handle portion constituting an annular body, touch switches are respectively provided on the flat plate portion and the columnar handle portion, installation matching ends connected to the refrigerator door are respectively provided at the connecting parts of the flat plate portion and the columnar handle portion, a rotating shaft mounting hole and an output shaft mounting hole of a handle drive motor are respectively provided at the installation matching ends, the rotating shaft mounting hole is hinged to the refrigerator door body through a rotating shaft, the output shaft mounting hole of the handle drive motor is matched with the output shaft of the handle drive motor, the handle drive motor is connected to the refrigerator door body through a bracket, the outer surface of the flat plate surface is flush with the outer surface of the refrigerator door body when the refrigerator door body is closed, and the touch switch and the handle drive motor are respectively connected to the control circuit of the refrigerator.

[0005] When in use, the refrigerator door can be opened by pressing the touch switch to start the handle drive motor and drive the invisible door handle to rotate. When the invisible door handle rotates to the set position, the contact on the mating end is installed to touch the travel switch to stop the handle drive motor from rotating, so that the invisible door handle stops rotating. At this time, you can hold the columnar handle of the invisible door handle to open the refrigerator door. After completing the operation of taking and placing items in the refrigerator and closing the refrigerator door, you can press the touch switch again to start the handle drive motor again and drive the invisible door handle to rotate and reset to the initial state. At this time, the contact on the mating end touches the travel switch again, so that the front of the flat plate part of the invisible door handle is flush with the outer surface of the refrigerator door.

[0006] In order to make the flat plate part of the invisible door handle flush with the outer surface of the refrigerator door and have a consistent appearance when the refrigerator door is in closed state, the preferred technical solution is that the outer surface layer of the flat plate part and the outer surface layer of the refrigerator door are made of the same material, the same color and the same surface treatment process, and the outer surface layer of the flat plate part can be connected to the main part of the flat plate part of the invisible door handle by bonding, welding, fitting, plugging, snapping and other connecting methods.

[0007] In order to facilitate the processing and production of invisible door handles and to facilitate installation and coordination with the refrigerator door body, a further preferred technical solution is that the main body part other than the outer surface layer of the flat plate part and the columnar handle part can be injection molded, or aluminum profile stretching and compression molded parts can be used, or a structure in which injection molded parts and aluminum profile stretching and compression molded parts are assembled together can be used.

[0008] In order to facilitate the installation of the touch switch and the wiring of the touch switch control line, a further preferred technical solution is that a touch switch installation groove and a touch switch wiring groove are provided in the injection molded part and / or the aluminum profile part, the touch switch installation groove is used to fix it inside the invisible door handle, and the touch switch wiring groove is used to fix and guide the positioning and wiring of the control line of the control switch. The injection molded part and / or the aluminum profile part can adopt a structure in which two pieces are buckled together as one body, and the touch switch installation groove and the touch switch wiring groove can be set between the two buckled bodies that buckle with each other, or the touch switch installation groove and the touch switch wiring groove can be opened on the back of the flat plate part and the columnar handle part of an integral structure. After the touch switch and the touch switch wiring are installed, the touch switch installation groove and the touch switch wiring groove are closed with a cover plate.

[0009] In order to facilitate the opening and closing operation of the refrigerator door, and to make the refrigerator door more beautiful after installing the invisible door handle, and also to make the invisible door handle easy to process, install and maintain, a further preferred technical solution is that the invisible door handle is vertically arranged on the refrigerator door, and the invisible door handle is a vertical D-shaped structure.

[0010] In order to facilitate the installation of the invisible door handle on the refrigerator door body and to facilitate the maintenance and replacement of the invisible door handle, a further preferred technical solution is that the invisible door handle is detachably linked to the bracket arranged in the refrigerator door body, and the shaft mounting hole is connected to the refrigerator door body through the shaft. The hinge structure includes a shaft, one end of the shaft cooperates with the shaft mounting hole, and the other end of the shaft extends into the first supporting hole in the bracket or the refrigerator door body, and a first spring is provided in the first supporting hole and is mounted on the shaft. One end of the first spring is pressed against the first supporting hole in the bracket or the refrigerator door body, and the other end of the first spring is pressed against the first baffle connected to the shaft.

[0011] In order to facilitate the installation of the invisible door handle on the refrigerator door body and facilitate the maintenance and replacement of the invisible door handle, a step section is required to be provided at one end of the columnar handle portion of the invisible door handle. When the flat plate portion of the invisible door handle is flush with the front of the refrigerator door body, the invisible door handle cannot be disassembled and repaired. Only when one end of the columnar handle portion of the invisible door handle is rotated to the front of the refrigerator door body, the invisible door handle can be pressed downward through the step section at one end of the columnar handle portion of the invisible door handle. By compressing the first spring and moving the rotating shaft downward, the motor output shaft mounting hole is disengaged from the output shaft of the handle driving motor. At this time, the invisible door handle can be disassembled from the refrigerator door body, and the operation of installing the invisible door handle on the refrigerator door body again is the opposite of the above disassembly process. Designing the refrigerator door invisible door handle to be a detachable structure is also convenient for replacing or cleaning the cleaning stick of the invisible door handle installed behind the invisible door handle 1 of the refrigerator door body.

[0012] Since the handles of household appliances such as refrigerators are frequently touched, there are often stains such as fingerprints on the handles. In order to be able to automatically and timely clean the stains on the handles, a preferred technical solution is that a cleaning roller of the invisible door handle is provided in the refrigerator door body, the cleaning roller is supported in the refrigerator door body by a bracket, and one end of the cleaning roller is connected to a cleaning roller driving motor through a bracket.

[0013] In order to facilitate the disassembly, cleaning and replacement of the cleaning roller, a further preferred technical solution is that the cleaning roller is detachably connected to the bracket, and blind holes are provided at both ends of the cleaning roller, or a through hole is provided that runs through the center of the cleaning roller, one end of the blind hole or the center hole cooperates with the output shaft of the cleaning roller driving motor, and the other end of the blind hole or the center hole cooperates with one end of the rotating support shaft, and the other end of the rotating support shaft extends into the second supporting hole in the bracket or the refrigerator door body, and a second spring sleeved on the rotating support shaft is provided in the second supporting hole, one end of the second spring presses against the second supporting hole in the bracket or the refrigerator door body, and the other end of the second spring presses against the second baffle connected to the rotating support shaft. The operation method of disassembling and replacing the cleaning roller is the same as the operation method of disassembling and replacing the invisible door handle.

[0014] In order to facilitate the automatic cleaning of the outer surface of the flat plate part and the outer surface of the columnar handle part of the invisible door handle which are exposed on the outer surface of the refrigerator door under normal circumstances, a further preferred embodiment of the present invention is that the cleaning roller comprises a cleaning roller of the flat plate part and a cleaning roller of the columnar handle part, one end of the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are respectively connected to the cleaning roller driving motor through a driving gear, the driving gear is meshed with a rack arranged on the bracket, the other ends of the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are slidably matched with a guide groove arranged on the bracket, the second spring and the second baffle are respectively arranged on the guide groove, the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are respectively arranged on the bracket with a front-back staggered position, and the cleaning roller of the flat plate part is cylindrical, and the cleaning roller of the columnar handle part is a rotating body imitating the outer contour of the columnar handle part. The specific automatic cleaning operation process includes: when the flat plate part of the invisible door handle of the refrigerator door rotates to the inside of the refrigerator door body, the cleaning roller of the flat plate part connected to the bracket located in the refrigerator door body engages with the rack through the cleaning roller driving motor driving gear, so that the cleaning roller of the flat plate part will rotate and move laterally along the straight line of the bracket at the same time. In this way, the cleaning roller of the flat plate part can automatically clean the flat surface of the invisible door handle in a combined motion state of lateral reciprocating motion and rotation. After the cleaning roller of the flat plate part automatically cleans the flat surface of the invisible door handle, it can be reset to an area away from the rotation motion trajectory of the invisible door handle, thereby avoiding the motion interference problem between the rotation motion of the invisible door handle and the cleaning motion of the cleaning roller of the flat plate part. When the columnar handle of the invisible door handle of the refrigerator door rotates to the inside of the refrigerator door body, the cleaning roller of the columnar handle part connected to the bracket located in the refrigerator door body engages with the rack through the cleaning roller driving motor driving gear, so that the cleaning roller of the columnar handle part will move laterally along the straight line of the bracket while rotating. In this way, the cleaning roller of the columnar handle part can automatically clean the surface of the columnar handle part of the invisible door handle in a combined motion state of lateral reciprocating motion and rotation. After automatically cleaning the columnar handle surface of the invisible door handle, the cleaning roller of the columnar handle part can be reset to an area away from the rotational motion trajectory of the invisible door handle, thereby avoiding the problem of motion interference between the rotational motion of the invisible door handle and the cleaning motion of the cleaning roller of the columnar handle part.

[0015] In order to prevent the cleaning roller drive motor from rotating synchronously or asynchronously with the cleaning roller during the process of driving the cleaning roller to rotate, a further preferred embodiment of the present invention is that the cleaning roller drive motor is mounted on a guide frame, and the guide frame is slidably matched with the outer side of the rack. The guide frame can be made into an inverted shaped bracket, and the inverted shaped bracket can be buckled on the bracket provided with the rack.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the invisible door handle used on the refrigerator door has beautiful appearance, simple structure, convenient operation, easy processing and manufacturing, and easy automatic cleaning of the door handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the side cross-sectional structure of the invisible door handle on the refrigerator door of the present invention when the refrigerator door is in a closed state;

[0018] Figure 2 The present invention is a side cross-sectional structural schematic diagram of the invisible door handle on the refrigerator door of the present invention when the refrigerator door is in an open state;

[0019] Figure 3 For the present invention Figure 1 AA section view;

[0020] Figure 4 For the present invention Figure 2 BB cross-sectional view;

[0021] Figure 5 It is a schematic diagram of the outer three-dimensional structure of the invisible door handle on the refrigerator door of the present invention in a closed state;

[0022] Figure 6 It is a schematic diagram of the outer three-dimensional structure of the invisible door handle on the refrigerator door of the present invention in the open door state;

[0023] Figure 7 It is a schematic diagram of the inner three-dimensional structure of the invisible door handle on the refrigerator door of the present invention in a closed state;

[0024] Figure 8 It is a schematic diagram of the inner three-dimensional structure of the invisible door handle on the refrigerator door of the present invention in the open door state;

[0025] Fig. 9 This is a schematic diagram of the inner three-dimensional structure of the invisible door handle on the refrigerator door of the present invention after removing the refrigerator door body;

[0026] Fig.10 This is a schematic diagram of the inner three-dimensional structure of the invisible door handle on the refrigerator door of the present invention after removing the refrigerator door body and the handle.

[0027] In the figure: 1. Invisible door handle; 1.1. Flat plate; 1.2. Columnar handle; 1.3. Mounting mating end; 2. Touch switch; 3. Shaft mounting hole; 4. Output shaft mounting hole; 5. Handle drive motor; 6. Shaft; 7. Refrigerator door; 8. Bracket; 9. First support hole; 10. First spring; 11. First baffle; 12. Step section; 13. Cleaning roller; 13.1. Cleaning roller; 14. Cleaning roller drive motor; 15. Blind hole; 16. Rotating support shaft; 17. Second support hole; 18. Second spring; 19. Second baffle; 20. Drive gear; 21. Rack; 22. Guide frame. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1-10 As shown, the present invention is an invisible door handle on a refrigerator door, the invisible door handle 1 includes a flat plate portion 1.1 and a columnar handle portion 1.2 constituting an annular body, a touch switch 2 is respectively provided on the flat plate portion 1.1 and the columnar handle portion 1.2, and a mounting mating end portion 1.3 connected to the refrigerator door is respectively provided at the connecting portion of the flat plate portion 1.1 and the columnar handle portion 1.2, and a rotating shaft mounting hole 3 and an output shaft mounting hole 4 of a handle drive motor 5 are respectively provided at the mounting mating end portion 1.3, the rotating shaft mounting hole 3 and the output shaft mounting hole 4 of the handle drive motor 5 are respectively provided, the rotating shaft mounting hole 3 is hinged to the refrigerator door body 7 through a rotating shaft 6, the output shaft mounting hole 4 of the handle drive motor 5 is matched with the output shaft of the handle drive motor 5, the handle drive motor 5 is connected to the refrigerator door body 7 through a bracket 8, the outer surface of the flat plate surface portion 1.1 is flush with the outer surface of the refrigerator door body 7 when the refrigerator door body 7 is closed, and the touch switch 2 and the handle drive motor 5 are respectively connected to the control circuit (not shown in the figure) of the refrigerator.

[0030] When in use, the refrigerator door opening operation can be performed by pressing the touch switch 2, which can start the handle drive motor 5 and drive the invisible door handle 1 to rotate. When the invisible door handle 1 rotates to the set position (rotated 180°), the contact on the installation matching end 1.3 touches the travel switch (not shown in the figure), so that the handle drive motor 5 can stop rotating, and the invisible door handle 1 can stop rotating. At this time, the columnar handle portion 1.2 of the invisible door handle 1 can be held to open the refrigerator door body 7. After completing the operation of taking and placing items in the refrigerator and closing the refrigerator door body 7, the touch switch 2 can be pressed again to start the handle drive motor 5 again, drive the invisible door handle to rotate and select and reset to the initial state again. At this time, the contact on the installation matching end 1.3 touches the travel switch (not shown in the figure) again, so that the front of the flat plate portion 1.1 of the invisible door handle 1 is flush with the outer surface of the refrigerator door body 1.

[0031] In order to ensure that the flat plate portion 1.1 of the invisible door handle 1 is flush with the outer surface of the refrigerator door body 7 and has a consistent appearance when the refrigerator door body 7 is in the closed state, a preferred embodiment of the present invention is that the outer surface layer of the flat plate portion 1.1 and the outer surface layer of the refrigerator door body 7 are made of the same material, the same color and the same surface treatment process, and the outer surface layer of the flat plate portion 1.1 can be connected to the main part of the flat plate portion 1.1 of the invisible door handle 1 by bonding, welding, fitting, plugging, snapping and other connecting methods.

[0032] In order to facilitate the processing and manufacturing of the invisible door handle 1 and to facilitate the installation and coordination with the refrigerator door body 7, a further preferred embodiment of the present invention is that the main body part other than the outer surface layer of the flat plate part 1.1 and the columnar handle part 1.2 can be injection molded, or aluminum profile stretching and compression molded parts, or a structure in which injection molded parts and aluminum profile stretching and compression molded parts are assembled together.

[0033] In order to facilitate the installation of the touch switch 2 and the wiring of the touch switch control line, a further preferred embodiment of the present invention is that a mounting groove and a touch switch wiring groove for the touch switch 2 are provided in the injection molded part and / or the aluminum profile part, the touch switch mounting groove is used to fix it inside the invisible door handle 1, and the touch switch wiring groove is used to fix and guide the positioning and wiring of the control line of the control switch. The injection molded part and / or the aluminum profile part can adopt a structure in which two pieces are buckled together as one body, and the touch switch mounting groove and the touch switch wiring groove can be set between the two buckled bodies that buckle with each other, or the touch switch mounting groove and the touch switch wiring groove can be opened on the back of the flat plate part 1.1 and the columnar handle part 1.2 of an integral structure. After the touch switch 2 and the touch switch wiring are installed, the touch switch mounting groove and the touch switch wiring groove are closed with a cover plate.

[0034] In order to facilitate the opening and closing operation of the refrigerator door body 7, and to make the refrigerator door body 7 more beautiful after installing the invisible door handle 1, and also to make the invisible door handle 1 easy to process, install and maintain, a further preferred embodiment of the present invention is that the invisible door handle 1 is vertically arranged on the refrigerator door body 1, and the invisible door handle 1 is a vertical D-shaped structure.

[0035] In order to facilitate the installation of the invisible door handle 1 on the refrigerator door body 7, and to facilitate the maintenance and replacement of the invisible door handle 1, a further preferred embodiment of the present invention is that the invisible door handle 1 is detachably linked to the bracket 8 arranged in the refrigerator door body 7, and the hinge structure of the shaft mounting hole 3 and the refrigerator door body 6 includes a shaft 6, one end of the shaft 6 cooperates with the shaft mounting hole 3, and the other end of the shaft 6 extends into the bracket 8 or the first support hole 9 in the refrigerator door body 7, and a first spring 10 is provided in the first support hole 9, one end of the first spring 10 is pressed against the bracket 8 or the first support hole 9 in the refrigerator door body 1, and the other end of the first spring 10 is pressed against the first baffle 11 connected to the shaft 6.

[0036] In order to facilitate the installation of the invisible door handle 1 on the refrigerator door body 7 and to facilitate the maintenance and replacement of the invisible door handle 1, a step section 12 is required to be provided at one end of the columnar handle portion 1.2 of the invisible door handle 1. When the flat plate portion 1.1 of the invisible door handle 1 is flush with the front of the refrigerator door body 7, the invisible door handle 1 cannot be disassembled and repaired. Only when one end of the columnar handle portion 1.2 of the invisible door handle 1 is rotated to the front of the refrigerator door body 7, can the invisible door handle 1 be pressed downward through the step section 1.2 at one end of the columnar handle portion 1.2 of the invisible door handle 1. By compressing the first spring 10 and moving the rotating shaft 6 downward, the motor output shaft mounting hole 3 is disengaged from the output shaft of the handle driving motor 5. At this time, the invisible door handle 1 can be removed from the refrigerator door body 1, and the operation of reinstalling the invisible door handle 1 on the refrigerator door body 7 is just the opposite of the above-mentioned disassembly process. The invisible door handle 1 of the refrigerator door is designed to be detachable, which is also convenient for replacing or cleaning the cleaning stick 13 of the invisible door handle 1 installed behind the invisible door handle 1 of the refrigerator door body.

[0037] Since the handles of household appliances such as refrigerators are frequently touched, there are often stains such as fingerprints on the handles. In order to be able to automatically and timely clean the stains on the handles, a preferred embodiment of the present invention is that a cleaning roller 13 of the invisible door handle 1 is provided in the refrigerator door body 7, and the cleaning roller 13 is supported in the refrigerator door body 1 by a bracket 8. One end of the cleaning roller 13 is connected to a cleaning roller drive motor 14 through the bracket 8.

[0038] In order to facilitate the disassembly, cleaning and replacement of the cleaning roller 13, a further preferred embodiment of the present invention is that the cleaning roller 13 is detachably linked to the bracket 8, and blind holes 15 are respectively provided at both ends of the cleaning roller 13, or a through hole is provided that runs through the center of the cleaning roller, one end of the blind hole 15 or the center hole cooperates with the output shaft of the cleaning roller driving motor 14, and the other end of the blind hole 15 or the center hole cooperates with one end of the rotating support shaft 16, and the other end of the rotating support shaft 16 extends into the second supporting hole 17 in the bracket 8 or the refrigerator door 7, and a second spring 18 is provided in the second supporting hole 17, which is sleeved on the rotating support shaft 16, and one end of the second spring 18 presses against the second supporting hole 17 in the bracket 8 or the refrigerator door 7, and the other end of the second spring 18 presses against the second baffle 19 connected to the rotating support shaft 16. The operation method of disassembling and replacing the cleaning roller 13 is the same as the operation method of disassembling and replacing the invisible door handle 1.

[0039] In order to facilitate automatic cleaning of the outer surface of the flat plate portion 1.1 and the outer surface of the columnar handle portion 1.2 of the invisible door handle 1 exposed on the outer surface of the refrigerator door under normal conditions, a further preferred embodiment of the present invention is that the cleaning roller 13 includes a cleaning roller 13 of the flat plate portion 1.1 of the invisible door handle 1 and a cleaning roller 13.1 of the columnar handle portion 1.2, and one end of the cleaning roller 13 of the flat plate portion 1.1 and the cleaning roller 13.1 of the columnar handle portion 1.2 are respectively connected to the cleaning roller drive motor 14 through a driving gear 20, and the driving gear 20 is connected to the support The rack 21 on the frame 8 is meshed, and the other ends of the cleaning roller 13 of the flat plate part 1.1 and the cleaning roller 13.1 of the columnar handle part 1.2 are slidably matched with the guide grooves respectively arranged on the bracket 8, and the second spring 18 and the second baffle 19 are respectively arranged on the guide grooves, and the cleaning roller 13 of the flat plate part 1.1 and the cleaning roller 13.1 of the columnar handle part 1.2 are respectively arranged on the bracket 8 in a front-to-back staggered manner, and the cleaning roller 13 of the flat plate part 1.1 is cylindrical, and the cleaning roller 13.1 of the columnar handle part 1.2 is a rotating body imitating the outer contour of the columnar handle part 1.2. The specific automatic cleaning operation process includes: when the flat plate part 1.1 of the invisible door handle 1 of the refrigerator door rotates to the inside of the refrigerator door body 7, the cleaning roller 13 of the flat plate part 1.1 connected to the bracket 8 located in the refrigerator door body 1 drives the gear 20 to engage with the rack 21 through the cleaning roller driving motor 14, so that the cleaning roller 13 of the flat plate part 1.1 will move laterally along the bracket 8 in a straight line while rotating. In this way, the cleaning roller 13 of the flat plate part 1.1 can automatically clean the surface of the flat plate part 1.1 of the invisible door handle 1 in a combined motion state of lateral reciprocating motion and rotation. After the cleaning roller 13 of the flat plate part 1.1 automatically cleans the surface of the flat plate part 1.1 of the invisible door handle 1, it can be reset to an area away from the rotational motion trajectory of the invisible door handle 1, thereby avoiding the motion interference problem between the rotational motion of the invisible door handle 1 and the cleaning motion of the cleaning roller 13 of the flat plate part 1.1. When the columnar handle portion 1.2 of the invisible door handle 1 of the refrigerator door rotates to the inside of the refrigerator door body 7, the cleaning roller 13.1 of the columnar handle portion 1.2 connected to the bracket 8 located in the refrigerator door body 7 drives the gear 20 to mesh with the rack 21 through the cleaning roller driving motor 14, so that the cleaning roller 13.1 of the columnar handle portion 1.2 will move laterally along the straight line of the bracket while rotating. In this way, the cleaning roller 13.1 of the columnar handle portion 1.2 can automatically clean the surface of the columnar handle portion 1.2 of the invisible door handle 1 in a combined motion state of lateral reciprocating motion and rotation. After the cleaning roller 13.1 of the columnar handle portion 1.2 automatically cleans the surface of the columnar handle portion 1.2 of the invisible door handle 1, it can be reset to an area away from the rotational motion track of the invisible door handle 1, thereby avoiding the motion interference problem between the rotational motion of the invisible door handle 1 and the cleaning motion of the cleaning roller 13.1 of the columnar handle portion 1.2.

[0040] In order to prevent the cleaning roller drive motor 14 from rotating synchronously or asynchronously with the cleaning roller in the process of driving the cleaning roller 13 to rotate, a further preferred embodiment of the present invention is that the cleaning roller drive motor 14 is mounted on a guide frame 22, and the guide frame 22 is slidably matched with the outer side of the rack 21. The guide frame 22 can be made into an inverted U-shaped bracket, and the inverted U-shaped bracket can be buckled on the bracket provided with the rack 21.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An invisible door handle on a refrigerator door, characterized in that: The invisible door handle comprises a flat plate portion and a columnar handle portion constituting an annular body, a touch switch is respectively provided on the flat plate portion and the columnar handle portion, an installation matching end portion connected to the refrigerator door is respectively provided at the connection portion between the flat plate portion and the columnar handle portion, a rotating shaft mounting hole and an output shaft mounting hole of a handle drive motor are respectively provided at the installation matching end portion, the rotating shaft mounting hole is hinged to the refrigerator door body through a rotating shaft, the output shaft mounting hole of the handle drive motor matches with the output shaft of the handle drive motor, the handle drive motor is connected to the refrigerator door body through a bracket, the outer surface of the flat plate portion is flush with the outer surface of the refrigerator door body when the refrigerator door body is closed, the touch switch and the handle drive motor are respectively connected to the control circuit of the refrigerator, a cleaning roller of the invisible door handle is provided in the refrigerator door body, the cleaning roller is supported in the refrigerator door body through a bracket, one end of the cleaning roller is connected to the cleaning roller drive motor through the bracket, the cleaning roller and the bracket are detachably connected, blind holes are respectively provided at both ends of the cleaning roller, or a through hole is provided that runs through the center of the cleaning roller, one end of the blind hole or the through hole matches with the output shaft of the cleaning roller drive motor, and the other end of the blind hole or the through hole matches with the output shaft of the cleaning roller drive motor One end of the rotating support shaft cooperates, and the other end of the rotating support shaft extends into a second supporting hole in the bracket or the refrigerator door body. A second spring sleeved on the rotating support shaft is provided in the second supporting hole, and one end of the second spring presses against the second supporting hole in the bracket or the refrigerator door body, and the other end of the second spring presses against the second baffle connected to the rotating support shaft. The cleaning roller comprises a cleaning roller of the flat plate part of the invisible door handle and a cleaning roller of the columnar handle part. One end of the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are respectively connected to the cleaning roller driving motor through a driving gear, and the driving gear is meshed with a rack arranged on the bracket. The other ends of the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are slidably matched with a guide groove arranged on the bracket, and the second spring and the second baffle are respectively arranged on the guide groove, and the cleaning roller of the flat plate part and the cleaning roller of the columnar handle part are respectively arranged on the bracket with a front-back staggered arrangement, and the cleaning roller of the flat plate part is cylindrical, and the cleaning roller of the columnar handle part is a rotating body imitating the outer contour of the columnar handle part, and the cleaning roller driving motor is installed on the guide frame, and the guide frame slides with the outer side of the rack.

2. The invisible door handle on the refrigerator door as claimed in claim 1, characterized in that: The outer surface layer of the flat plate portion and the outer surface layer of the refrigerator door body are made of the same material, the same color and the same surface treatment process.

3. The invisible door handle on the refrigerator door as claimed in claim 2, characterized in that: The main body part other than the outer surface layer of the flat plate part and the columnar handle part are made of injection molding or aluminum profiles.

4. The invisible door handle on the refrigerator door as claimed in claim 3, characterized in that: A touch switch installation groove and a touch switch wiring groove are arranged in the injection molded part or the aluminum profile part.

5. The invisible door handle on the refrigerator door as claimed in claim 4, characterized in that: The invisible door handle is vertically arranged on the refrigerator door body, and the invisible door handle is a vertical D-shaped structure.

6. The invisible door handle on the refrigerator door as claimed in claim 5, characterized in that: The invisible door handle is detachably connected to a bracket arranged in the refrigerator door body, and the shaft mounting hole is hinged to the refrigerator door body through the shaft, including a shaft, one end of the shaft cooperates with the shaft mounting hole, and the other end of the shaft extends into a first supporting hole in the bracket or the refrigerator door body, and a first spring sleeved on the shaft is provided in the first supporting hole, one end of the first spring presses against the first supporting hole in the bracket or the refrigerator door body, and the other end of the first spring presses against a first baffle connected to the shaft.

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