Electric retractable automobile handle

Abstract

The present application relates to the technical field of automobile handle, and discloses an electric retractable automobile handle, which comprises a handle and a containing groove capable of completely containing the handle and concaved on a door, the handle is rotationally arranged in the containing groove, a driving structure for controlling the handle to turn outward or inward is arranged in the door, the driving structure comprises a mounting cavity arranged in the door, a moving block moving in the mounting cavity, a lead screw rotationally arranged in the mounting cavity, a transmission structure arranged between the lead screw and the moving block and a traction structure arranged between the moving block and the handle, the rotation of the lead screw is controlled by a motor, a heating structure is arranged on the outside of the handle, a one-way slipping structure is arranged between the motor shaft of the motor and the lead screw, and a switching structure for controlling the opening and closing of the heating structure is arranged, the automobile handle only needs to control the rotation of the motor, and the handle can be automatically heated to melt ice when the handle is turned outward and is resisted by ice, and the handle can be automatically driven to smoothly extend when the resistance disappears.

Description

Technical Field

[0001] This invention relates to the field of automotive handlebar technology, and more particularly to an electrically retractable automotive handlebar. Background Technology

[0002] Common car door handles are usually installed on the outside of the car door. When the vehicle is in motion, the exposed door handles will generate a certain amount of wind resistance, which will lead to increased fuel consumption of gasoline cars or shortened driving range of electric cars. Therefore, hidden car door handles have emerged.

[0003] Chinese Patent Application No. 201920811162.1 discloses a swing mechanism for an automobile door handle, comprising: a door handle, which is flush with the door and can rotatably extend out of the door or retract into the door; a base, which is installed on the inside of the door and the door handle is rotatably mounted on the base; a swing arm, which is rotatably mounted on the base and rotates synchronously with the door handle; an unlocking device, which is rotatably mounted on the base, with one end abutting against the swing arm and the other end connected to the automobile door lock; and a drive device, which is mounted on the base and is used to drive the swing arm to rotate.

[0004] In this patent, the drive device rotates the swing arm to drive the door handle to rotate and extend it outside the door for gripping. During the above process, the door is unlocked through the unlocking structure. The user can open the door by holding the extended door handle and pulling it outward.

[0005] However, when the temperature is low, ice may form on the outside of the car door when the car is parked outdoors, making it impossible for the door handle to turn and extend. If the door handle is forcibly turned, it may damage the drive mechanism or the door handle. The only solution is to wait for the temperature to rise or pour hot water to melt the ice. Summary of the Invention

[0006] This invention addresses the drawback of existing technologies where car door handles cannot extend after ice forms on the exterior of the door, by providing an electrically retractable car door handle.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] An electrically retractable car door handle includes a handle and a recessed groove in the door for fully retracting the handle. The handle is rotatably disposed within the groove. A drive structure is provided inside the door to control the handle to flip outwards, exposing one end of the handle outside the groove for gripping, or to control the handle to flip inwards and retract into the groove for concealment. The drive structure includes a mounting cavity inside the door, a movable block that reciprocates linearly within the mounting cavity and can move closer to or away from the groove, a lead screw rotatably disposed within the mounting cavity, a transmission structure between the lead screw and the movable block that controls the movable block to move away from the groove when the lead screw rotates forward or closer to the groove when it rotates in the reverse direction, and a drive mechanism between the movable block and the handle that controls the handle to move away from the groove when it moves back. The system includes a traction structure that causes the handle to flip outwards or inwards when the moving block approaches the receiving slot. The rotation of the lead screw is controlled by a motor. A heating structure is installed inside the handle. A one-way slippage structure is provided between the motor shaft and the lead screw to allow them to rotate synchronously or relative to each other. A switching structure is also provided to activate the heating structure when the motor shaft and the lead screw rotate relative to each other or deactivate the heating structure when they rotate synchronously. During the forward rotation of the motor shaft and the lead screw, if ice forms on the outside of the door, preventing the handle from flipping outwards and thus preventing the lead screw from rotating, the motor shaft slips relative to the lead screw. Once the resistance from the ice on the handle disappears, the motor shaft and the lead screw rotate synchronously. During the reverse rotation of the motor shaft and the lead screw, they always rotate synchronously.

[0009] Using the above scheme, the motor is started remotely by an external key. The motor shaft rotates, causing the lead screw to rotate synchronously in the forward direction, driving the moving block away from the receiving slot. Then, through a traction structure, the handle is flipped outward, unlocking the car door and exposing one end of the handle outside the receiving slot for gripping. When ice forms on the outside of the car door, the handle cannot be flipped outward, preventing the lead screw from rotating. At this point, a one-way slippage structure allows the motor shaft to slip relative to the lead screw and rotate independently in the forward direction. That is, the motor shaft and lead screw rotate relative to each other. At this time, a switching structure controls the heating structure to activate and melt the ice until the ice melts. Then, the one-way slippage structure allows the motor shaft and lead screw to rotate synchronously in the forward direction again. At this time, the heating structure is turned off, and the handle flips outward until the car door unlocks. Conversely, the motor drives the motor shaft and lead screw to rotate synchronously in the opposite direction, driving the moving block closer to the receiving slot, flipping the handle inward, and resetting it to be stored hidden inside the receiving slot. By simply controlling the motor rotation, if the handle encounters resistance from the ice layer when flipping outward, it will automatically heat up to melt the ice, and after the resistance disappears, it will automatically extend smoothly.

[0010] As a preferred embodiment, the one-way slip structure includes a slot for inserting the motor shaft recessed on the side of the lead screw away from the moving block, a slot recessed on the side wall of the slot, a telescopic groove recessed on the outer ring wall of the motor shaft, and a locking block that can be partially inserted into the slot and is elastically telescopically arranged in the telescopic groove. The locking block is provided with a pressing slope that drives the locking block to retract into the telescopic groove and disengage from the slot when the motor shaft rotates in the forward direction relative to the lead screw.

[0011] Using the above scheme, the motor shaft and lead screw will only rotate synchronously when the locking block is inserted into the slot. When the resistance on the handle is large enough—that is, when the resistance is greater than the sum of forces required to flip the handle outward to unlock the door—the locking block will elastically retract into the telescopic groove and disengage from the slot under the squeezing and sliding action of the squeezing ramp and the slot. This causes slippage between the motor shaft and the lead screw, with the lead screw remaining stationary while the motor shaft continues to rotate forward. Each time the motor shaft rotates to a position where the telescopic groove and the slot are aligned, the locking block will elastically extend and insert into the slot. At this point, if resistance still exists, the motor shaft will continue to slip; if resistance disappears, the motor shaft will stop slipping, and the motor shaft and lead screw will rotate synchronously. When the motor shaft and lead screw rotate synchronously in opposite directions, there is no squeezing ramp, so they will not slip and will always rotate synchronously. Therefore, a unidirectional slippage method is formed where slippage only occurs when rotating forward and the resistance is large enough.

[0012] Preferably, the switching structure includes a signal transmitting device disposed on the side of the lead screw away from the moving block, a signal receiving device disposed on the side wall of the mounting cavity and electrically connected to the heating structure, and a control structure disposed between the lead screw and the motor shaft that controls the signal transmitting device to transmit a signal when the two rotate relative to each other or controls the signal transmitting device to stop transmitting a signal when the two are synchronized. When the signal receiving device receives a signal, it controls the heating structure to turn on; when the signal receiving device does not receive a signal, it controls the heating structure to turn off.

[0013] Using the above scheme, when the motor shaft slips relative to the lead screw and the two rotate relative to each other, the control structure controls the signal transmitter to transmit a signal. After receiving the signal, the signal receiver controls the heating structure to start heating and melting the ice. After the ice layer disappears, when the motor shaft rotates again until the telescopic groove and the slot are aligned, the locking block elastically extends and inserts into the slot, making the motor shaft and the lead screw relatively stationary, i.e., synchronized. At this time, the control structure controls the signal transmitter to stop transmitting signals. After the signal receiver no longer receives signals, it controls the heating structure to shut down.

[0014] Preferably, the control structure includes a normally closed magnetic switch disposed on the side of the lead screw away from the moving block and a magnetic component disposed on the outer ring wall of the motor shaft that can control the opening and closing of the normally closed magnetic switch. A battery is disposed on the lead screw, and the normally closed magnetic switch, the signal transmitting device and the battery are connected in series. When the card block is inserted into the card slot, the normally closed magnetic switch and the magnetic component face each other to shut off the heating structure.

[0015] Using the above scheme, the normally closed magnetic switch, the signal transmitter, and the battery are connected in series. When the normally closed magnetic switch is closed, the circuit is connected, and the signal transmitter emits a signal. When the normally closed magnetic switch is open, the circuit is broken, and the signal transmitter stops emitting a signal. The normally closed magnetic switch is closed in the absence of a magnetic field and open when a magnetic field is present. Since the motor shaft and the lead screw only rotate synchronously when the card block is inserted into the slot, the synchronous rotation of both indicates that the normally closed magnetic switch and the magnetic component are facing each other. At this time, the normally closed magnetic switch is open, the circuit is broken, and the signal transmitter stops emitting a signal. Conversely, when the motor shaft rotates relative to the lead screw, the magnetic component moves away from the normally closed magnetic switch, at which point the normally closed magnetic switch closes, the circuit is connected, and the signal transmitter emits a signal.

[0016] Preferably, the signal transmitting device is an infrared emitting tube, and the signal receiving device is an infrared sensor switch.

[0017] Preferably, the heating structure includes a heating wire disposed inside the handle and a power supply disposed inside the door, wherein the power supply, the infrared sensor switch and the heating wire are connected in series.

[0018] Using the above scheme, the infrared emitting tube emits an infrared signal after being powered on. The infrared sensor switch turns off after receiving the infrared signal, connecting the circuit formed by the power supply, the infrared sensor switch, and the heating wire, thus powering on the heating wire for heating. Conversely, the infrared emitting tube stops emitting infrared signals after being powered off, and the infrared sensor switch turns off after not receiving an infrared signal, disconnecting the circuit formed by the power supply, the infrared sensor switch, and the heating wire, thus powering off the heating wire and stopping heating.

[0019] Preferably, the traction structure includes a pull rope with one end connected to the moving block and the other end connected to either end of the handle, and a torsion spring disposed between the handle and the receiving groove to control the handle to flip inward and reset when the tension of the pull rope is removed. There is a through groove between the bottom of the receiving groove and the mounting cavity through which the pull rope can pass and move.

[0020] Using the above scheme, when the moving block moves away from the receiving groove, the handle is pulled outward by the pull rope, and the torsion spring deforms to generate a restoring force; when the moving block moves closer to the receiving groove, the pull rope loosens and is no longer taut, the pulling force from the pull rope on the handle disappears, and the handle is turned inward to the reset position under the action of the restoring force of the torsion spring, and is hidden in the receiving groove.

[0021] Preferably, the transmission structure includes a relief groove recessed on the side of the moving block near the lead screw for inserting and moving the lead screw, a nut threaded to the lead screw and provided on the side of the moving block near the lead screw, a guide block protruding on the moving block, and a guide groove recessed on the side wall of the mounting cavity for inserting the guide block and moving linearly along the lead screw axis.

[0022] Using the above scheme, with the threaded engagement of the lead screw and nut and the linear movement limit of the guide block and guide groove, when the lead screw rotates in the forward direction, it drives the moving block to move linearly away from the receiving groove; when the lead screw rotates in the reverse direction, it drives the moving block to move linearly closer to the receiving groove.

[0023] Preferably, a positioning sensing structure is provided between the guide block and the guide groove to control the motor to stop rotating when the handle is flipped outward to unlock the car lock or flipped inward to reset and be stored in the receiving groove.

[0024] Using the above scheme, the positioning sensor structure determines the position of the moving block by sensing the position of the guide block, thereby determining the degree of handle rotation. When the positioning sensor structure senses that the handle is flipped outward to unlock the vehicle, it controls the motor to stop rotating; when the positioning sensor structure senses that the handle is flipped inward to reset and be stored in the receiving slot, it controls the motor to stop rotating as well.

[0025] Preferably, the positioning sensing structure includes a first micro switch disposed on the side wall of the guide groove away from the receiving groove and a second micro switch disposed on the side wall of the guide groove near the receiving groove. A control module is disposed inside the door. The first micro switch, the second micro switch and the motor are electrically connected to the control module. When the handle is flipped outward to unlock the car, the guide block contacts the first micro switch; when the handle is flipped inward to reset, the guide block contacts the second micro switch.

[0026] Using the above scheme, when the handle is flipped outward to unlock the vehicle, the guide block contacts the first micro switch, sending a signal to the control module to stop the motor from rotating; similarly, when the handle is flipped inward to reset, the guide block contacts the second micro switch, and the control module controls the motor to stop rotating.

[0027] This invention, employing the above technical solutions, achieves significant technical effects: When the motor shaft rotates and there is no resistance on the outside of the handle, the lead screw rotates, driving the moving block away from the receiving groove, and the handle is pulled outward by the pull rope; if ice restricts the handle from turning outward, the motor shaft first slips against the lead screw, the magnetic component moves away from the normally closed magnetic switch, causing the normally closed magnetic switch to close, the infrared emitting tube is energized to emit an infrared signal, the infrared sensing switch closes after receiving the infrared signal, and the heating wire is energized to heat and melt the ice. During the process of ice resistance, the motor shaft continuously slips, causing the heating wire to continue heating until the ice resistance disappears. After the motor shaft rotates to the point where the telescopic groove and the slot are aligned, the locking block inserts into the slot and no longer slips. At this time, the magnetic component is aligned with the normally closed magnetic switch, causing the normally closed magnetic switch to open, the infrared emitting tube is de-energized and stops emitting infrared signals, the infrared sensing switch opens after no infrared signal is received, the heating wire is de-energized and stops heating, and simultaneously the motor shaft and lead screw rotate synchronously in the forward direction, driving the handle to turn outward. Conversely, the motor shaft rotates in the opposite direction, causing the lead screw to rotate synchronously in the opposite direction, causing the handle to flip inward and reset. By simply controlling the motor to rotate, if the handle encounters resistance from the ice layer when it flips outward, it will automatically heat up and melt the ice, and after the resistance disappears, it will automatically drive the handle to extend smoothly. Attached Figure Description

[0028] Figure 1 This is an isometric view of an electrically retractable car handle according to an embodiment;

[0029] Figure 2 This is an isometric view of an electrically retractable car door handle in one embodiment, showing the handle hidden inside the door.

[0030] Figure 3 This is an isometric view of one end of an electric retractable car door handle protruding outside the car door in one embodiment.

[0031] Figure 4 This is a front view of an electrically retractable car door handle in one embodiment, showing the handle hidden inside the car door;

[0032] Figure 5 yes Figure 4 Sectional view at point AA;

[0033] Figure 6 yes Figure 5 Enlarged view of point B in the image;

[0034] Figure 7 This is a partial enlarged view of the motor shaft and lead screw rotating relative to each other in an electric retractable car handle according to the embodiment;

[0035] Figure 8 yes Figure 5 Enlarged view of point C in the image;

[0036] Figure 9This is a half-sectional view of one end of the handle protruding outside the car door in an embodiment of an electrically retractable car handle.

[0037] Figure 10 yes Figure 9 Enlarged view of point D in the image;

[0038] Figure 11 yes Figure 10 Enlarged view of point E in the image;

[0039] Figure 12 This is a split view of an electrically retractable car handle according to an embodiment;

[0040] Figure 13 yes Figure 12 Enlarged view of point F in the image;

[0041] Figure 14 yes Figure 12 Enlarged view of point G in the image.

[0042] The parts referred to by the numbers in the above attached figures are as follows: 1. Door; 2. Handle; 3. Receiving groove; 4. Mounting cavity; 5. Moving block; 6. Lead screw; 7. Motor; 8. Motor shaft; 9. Slot; 10. Slot; 11. Telescopic groove; 12. Locking block; 13. Extrusion slope; 14. Elastic element; 15. Signal transmitting device; 16. Signal receiving device; 17. Normally closed magnetic switch; 18. Magnetic element; 19. Battery; 20. Integrated box; 21. Heating wire; 22. Clearance groove; 23. Nut; 24. Pull rope; 25. Torsion spring; 26. Through groove; 27. Guide block; 28. Guide groove; 29. ​​First micro switch; 30. Second micro switch. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0044] Example

[0045] An electrically retractable car door handle, reference Figures 1 to 14 This includes the car door 1. Since the car door 1 and the installation and opening / closing method between the car door 1 and the vehicle are existing technologies, this embodiment... Figures 2 to 14 The diagram of a partial view of the car door 1 is simplified and is mainly used to describe the installation method between the car handle and the car door 1, as well as the extension and retraction process of the car handle inside the car door 1.

[0046] The door 1 is equipped with a drive mechanism that controls the handle 2 to flip outwards or inwards. When the handle 2 flips outwards, one end of the handle 2 retracts into the receiving groove 3, while the other end of the handle 2 protrudes outside the receiving groove 3 for gripping. When the handle 2 flips inwards, the end of the handle 2 that was previously retracted into the receiving groove 3 turns outwards, while the end that was previously exposed turns inwards and retracts into the receiving groove 3, until the handle 2 flips inwards and is fully retracted into the receiving groove 3, i.e., the outer side of the handle 2 is flush with the outer surface of the door 1, thus concealing the handle 2 and minimizing wind resistance. In addition, when the handle 2 is flipped outwards to be fully extended, the door 1 is unlocked via an unlocking mechanism.

[0047] In most existing vehicles, the door 1 can be unlocked by flipping the handle 2 outward. Based on the description in the background art, it can be seen that the method of unlocking the door 1 by flipping the handle 2 outward in this embodiment is existing technology and is not related to the technical problem that this solution needs to solve. Therefore, the unlocking method of the door 1 and the unlocking structure of the door are not illustrated in this embodiment and will not be described in detail. For details, please refer to the unlocking structure mentioned in the comparative patent in the background art.

[0048] The drive structure includes a mounting cavity 4 within the door 1. A movable block 5, capable of reciprocating linearly within the mounting cavity 4 and moving closer to or further away from the receiving groove 3, is fixedly mounted on the side of the movable block 5 closest to the receiving groove 3. The end of the pull rope 24 furthest from the movable block 5 is fixed to either end of the handle 2. In this embodiment, the end of the pull rope 24 furthest from the movable block 5 is fixed to the end of the handle 2 closest to the movable block 5 and to the side wall of the handle 2 near the bottom of the receiving groove 3. The handle 2 and the receiving groove 3 are rotatably connected via a pivot. A torsion spring 25 is mounted on the pivot. When the torsion spring 25 is in its initial normal state, the handle 2 is retracted into the receiving groove 3, and the outer surface of the handle 2 is flush with the outer surface of the door 1. A through groove 26 exists between the bottom of the receiving groove 3 and the mounting cavity 4, allowing the pull rope 24 to pass through and move.

[0049] When the moving block 5 moves away from the receiving groove 3, the pull rope 24 is tightened and moves, pulling the handle 2 outward through the pull rope 24. That is, the end of the handle 2 that is fixed to the pull rope 24 is retracted into the receiving groove 3, and the end of the handle 2 that is not connected to the pull rope 24 is exposed outside the receiving groove 3. It flips outward until the door 1 is unlocked. At this time, the torsion spring 25 deforms and generates a return spring force. When the moving block 5 moves closer to the receiving groove 3, the pull rope 24 is relaxed, the tension on the handle 2 disappears, and under the action of the return spring force of the torsion spring 25, the handle 2 flips inward until it is reset and hidden.

[0050] The movement of the movable block 5 is controlled by the rotation of the lead screw 6. A recessed clearance groove 22 is provided on the side of the movable block 5 closest to the lead screw 6, allowing the lead screw 6 to insert into it. This clearance groove 22 also allows the lead screw 6 and the movable block 5 to move smoothly relative to each other along the axial direction of the lead screw 6. A nut 23 is fixedly installed on the side of the movable block 5 furthest from the receiving groove 3, and the nut 23 is threadedly engaged with the lead screw 6. A guide block 27 protrudes from the movable block 5, and a guide groove 28 is recessed on the side wall of the mounting cavity. The guide block 27 is inserted into the guide groove 28 and slides in a guiding manner with the guide groove 28, restricting the rotation of the movable block 5 and ensuring that the movable block 5 moves linearly reciprocating within the mounting cavity 4. When the lead screw 6 rotates forward, it controls the movable block 5 to move away from the receiving groove 3; when the lead screw 6 rotates in the reverse direction, it controls the movable block 5 to move closer to the receiving groove 3.

[0051] The rotation of the lead screw 6 is controlled by the motor 7, which is fixed inside the door 1, and the motor shaft 8 of the motor 7 is concentric with the lead screw 6. A slot 9 is recessed on the side of the lead screw 6 away from the moving block 5, and the end of the motor shaft 8 away from the motor 7 is inserted into the slot 9. A retaining groove 10 is recessed on the side wall of the slot 9, and a telescopic groove 11 is recessed on the outer ring wall of the motor shaft 8. A retaining block 12 is telescopically installed within the telescopic groove 11. When the retaining block 12 partially extends out of the telescopic groove 11 and inserts into the retaining groove 10, it causes the motor shaft 8 and the lead screw 6 to rotate synchronously. When the retaining block 12 retracts into the telescopic groove 11, it can disengage from the retaining groove 10, causing the motor shaft 8 to rotate relative to the lead screw 6. An elastic element 14 is provided between the bottom of the retaining block 12 and the telescopic groove 11 along the telescopic direction of the retaining block 12. Under normal conditions, the elastic element 14 controls the retaining block 12 to partially extend out of the telescopic groove 11. The elastic coefficient of the elastic element 14 is greater than the elastic coefficient of the torsion spring 25. The locking block 12 is provided with a pressing inclined surface 13, which can drive the locking block 12 to retract into the telescopic groove 11 and disengage from the locking groove 10 when the motor shaft 8 rotates in the forward direction relative to the lead screw 6. In this embodiment, the elastic element 14 is a spring.

[0052] The motor shaft 8 and the lead screw 6 will only rotate synchronously when the locking block 12 is inserted into the slot 10. When the resistance on the outside of the handle 2 is large enough, that is, when the resistance is greater than the sum of the forces required to overcome when the handle 2 is flipped outward to unlock the door 1, the locking block 12 will overcome the deformation force of the elastic element 14 under the squeezing and sliding of the squeezing inclined surface 13 and the slot 10, and retract into the telescopic groove 11 and disengage from the slot 10. That is, slippage occurs between the motor shaft 8 and the lead screw 6, the lead screw 6 remains stationary while the motor shaft 8 continues to rotate in the forward direction. Whenever the motor shaft 8 rotates to the point where the telescopic groove 11 and the slot 10 are aligned, the locking block 12 will elastically extend and insert into the slot 10. At this time, if the resistance still exists, the motor shaft 8 will continue to slip; if the resistance disappears, the motor shaft 8 will stop slipping, and the motor shaft 8 and the lead screw 6 will rotate synchronously. When the motor shaft 8 and the lead screw 6 rotate synchronously in opposite directions, there is no squeezing inclined plane 13, so they will not slip and will always rotate synchronously. Therefore, a one-way slipping mode is formed, which only slips when rotating in the forward direction and the resistance is large enough.

[0053] An integrated box 20 is provided on the side of the lead screw 6 away from the moving block 5. A signal transmitting device 15 is provided on the side of the integrated box 20 away from the lead screw 6. In this embodiment, the signal transmitting device 15 is an infrared emitting tube. A normally closed magnetic switch 17 is provided on the side of the integrated box 20 near the outer ring wall of the motor shaft 8. A battery 19 and a circuit connecting the battery 19, the infrared emitting tube, and the normally closed magnetic switch 17 in series are provided inside the integrated box 20. The connection method of the battery 19, the infrared emitting tube, and the normally closed magnetic switch 17 is prior art and is not shown in the figure, nor will it be described in detail here. The connection method of the battery 19, the infrared emitting tube, and the normally closed magnetic switch 17 is simply illustrated. A magnetic element 18 is provided on the outer ring wall of the motor shaft 8, and when the locking block 12 is inserted into the locking slot 10, the normally closed magnetic switch 17 and the magnetic element 18 are facing each other.

[0054] When the motor shaft 8 and the lead screw 6 are inserted into the slot 10, the normally closed magnetic switch 17 and the magnetic component 18 are facing each other. The normally closed magnetic switch 17 is open, the circuit is broken, and the infrared emitting tube does not emit infrared signals. Conversely, when the motor shaft 8 rotates relative to the lead screw 6, the magnetic component 18 moves away from the normally closed magnetic switch 17, the normally closed magnetic switch 17 closes, the circuit is connected, and the infrared emitting tube emits infrared signals.

[0055] A heating wire 21 is installed inside the handle 2, a power source is installed inside the door 1, and a signal receiving device 16 is installed inside the mounting cavity 4. In this embodiment, the signal receiving device 16 is an infrared sensor switch. The heating wire 21, the power source, and the infrared sensor switch are connected in series to form a circuit. The way the power source is configured and the connection method between the power source, the heating wire 21, and the infrared sensor switch are existing technologies and are not shown in the figure, nor will they be described in detail here. The heating wire 21 and the infrared sensor switch are simply illustrated in the figure. When the infrared sensor switch receives infrared light, it closes, making the above circuit a closed circuit, and the heating wire 21 is energized and heated; when the infrared sensor switch does not receive infrared light, it opens, making the above circuit an open circuit, and the heating wire 21 is de-energized and stops heating.

[0056] Since the signal transmission distance of infrared emitting tubes can generally reach more than 3 meters, the integrated box 20 rotates with the lead screw 6 in the mounting cavity 4. No matter where the integrated box 20 rotates, the motor shaft 8 and the lead screw 6 rotate relative to each other, driving the infrared emitting tube to emit infrared rays, and the infrared sensor switch can receive the infrared signal.

[0057] A positioning sensing structure is provided between the guide block 27 and the guide groove 28. The positioning sensing structure determines the position of the moving block 5 by sensing the position of the guide block 27, thereby determining the degree of rotation of the handle 2. When the positioning sensing structure senses that the handle 2 is flipped outward to unlock the car, or senses that the handle 2 is flipped inward to reset and be stored in the receiving groove 3, it controls the motor 7 to stop rotating.

[0058] The positioning sensing structure includes a first microswitch 29 disposed on the side wall of the guide groove 28 away from the receiving groove 3, and a second microswitch 30 disposed on the side wall of the guide groove 28 near the receiving groove 3. A control module is disposed inside the door 1, and the first microswitch 29, the second microswitch 30, and the motor 7 are electrically connected to the control module. When the handle 2 is flipped outward to unlock the car, the guide block 27 contacts the first microswitch 29, sending a signal to the control module to stop the motor 7 from rotating; similarly, when the handle 2 is flipped inward to reset, the guide block 27 contacts the second microswitch 30, and the control module controls the motor 7 to stop rotating. The configuration of the control module and the connection control method between the control module and the first microswitch 29, the second microswitch 30, and the motor are existing technologies and are not shown in the figure, nor will they be described in detail here.

[0059] When the car door 1 is opened, the car key remote control motor 7 causes the motor shaft 8 to rotate in the forward direction. If there is no resistance on the outside of the handle 2, the lead screw 6 rotates synchronously in the forward direction, driving the moving block 5 away from the receiving groove 3. The pull rope 24 pulls the handle 2 to flip outward. If there is ice restricting the handle 2 from flipping outward, the lead screw 6 cannot rotate. After the squeezing inclined surface 13 and the slot 10 are squeezed and slid, they elastically retract into the telescopic groove 11 and disengage from the slot 10, causing the motor shaft 8 and the lead screw 6 to slip. The magnetic component 18 moves away from the normally closed magnetic switch 17, causing the normally closed magnetic switch 17 to close. The infrared emitting tube is energized and emits an infrared signal. After receiving the infrared signal, the infrared sensor switch closes. The heating wire 21 is energized to heat and melt the ice. During the process where there is ice resistance... During the process, the motor shaft 8 continuously slips, causing the heating wire 21 to continue heating until the resistance of the ice layer disappears. After the motor shaft 8 rotates until the telescopic groove 11 and the slot 10 are aligned, the locking block 12 inserts into the slot 10 and no longer slips. At this time, the magnetic component 18 is aligned with the normally closed magnetic switch 17, causing the normally closed magnetic switch 17 to open. The infrared emitting tube is de-energized and stops emitting infrared signals. The infrared sensor switch is de-energized after not receiving infrared signals. The heating wire 21 is de-energized and stops heating. At the same time, the motor shaft 8 and the lead screw 6 rotate synchronously in the forward direction, driving the handle 2 to flip outward until the guide block 27 touches the first micro switch 29, causing the motor 7 to stop rotating. The handle 2 flips outward to unlock the car door 1, and the user can open the car door 1 by holding the handle 2.

[0060] After the car door 1 is opened, the remote control motor 7 causes the motor shaft 8 to rotate in the opposite direction, which in turn drives the lead screw 6 to rotate in the opposite direction, causing the moving block 5 to move closer to the receiving groove 3. The pull rope 24 loosens, and the tension on the handle 2 from the pull rope 24 disappears. Under the restoring force of the torsion spring 25, the handle 2 flips outward to return to its original position flush with the car door. The technology of opening and closing the car key remote control motor 7 is existing technology and will not be described in detail here.

[0061] When there is no power, you can also press the end of the handle 2 that is connected to the pull rope 24 to make the other end pop up. Hold the popped end and flip it outward to unlock and open the car door 1.

[0062] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An electrically retractable car door handle, comprising a handle (2) and a recessed groove (3) on a car door (1) for fully retracting the handle (2), wherein the handle (2) is rotatably disposed within the recessed groove (3), and a drive structure is provided inside the car door (1) for controlling the handle (2) to flip outward so that one end of the handle (2) protrudes outside the recessed groove (3) for gripping or controlling the handle (2) to flip inward and reset to be retracted into the recessed groove (3), characterized in that: The drive structure includes a mounting cavity (4) provided inside the door (1), a movable block (5) that reciprocates linearly within the mounting cavity (4) and can move closer to or away from the receiving groove (3), a lead screw (6) rotatably provided within the mounting cavity (4), a transmission structure provided between the lead screw (6) and the movable block (5) that controls the movable block (5) to move away from the receiving groove (3) when the lead screw (6) rotates in the forward direction or to move closer to the receiving groove (3) when it rotates in the reverse direction, and a transmission structure provided between the movable block (5) and the handle (2) that drives the handle (2) to flip outward when the movable block (5) moves away from the receiving groove (3) or to move towards the receiving groove (3) when the movable block (5) moves closer to the receiving groove (3). The inward-flipping traction structure, the rotation of the lead screw (6) is controlled by the motor (7), the handle (2) is equipped with a heating structure, the motor shaft (8) of the motor (7) and the lead screw (6) are equipped with a one-way slipping structure that allows them to rotate synchronously or relative to each other, and a switching structure that drives the heating structure to open when the motor shaft (8) rotates relative to the lead screw (6) or closes the heating structure when the motor shaft (8) rotates synchronously with the lead screw (6). During the forward rotation of the motor shaft (8) and the lead screw (6), when the outside of the door (1) is icy and the handle (2) cannot be flipped outward and the lead screw (6) cannot be rotated, the motor shaft (8) slips relative to the lead screw (6); when the handle (2) is flipped up... After the resistance of the ice layer disappears, the motor shaft (8) and the lead screw (6) rotate synchronously. During the process of the motor shaft (8) and the lead screw (6) rotating in opposite directions, they always rotate synchronously. The one-way slip structure includes a slot (9) for inserting the motor shaft (8) recessed on the side of the lead screw (6) away from the moving block (5), a groove (10) recessed on the side wall of the slot (9), a telescopic groove (11) recessed on the outer ring wall of the motor shaft (8), and a locking block (12) elastically telescopically arranged in the telescopic groove (11) that can be partially inserted into the groove (10). The locking block (12) is provided with a mechanism that drives the locking block (12) to retract when the motor shaft (8) rotates in the forward direction relative to the lead screw (6). The extrusion slope (13) that separates the telescopic groove (11) from the slot (10) includes a switching structure comprising a signal transmitting device (15) provided on the side of the lead screw (6) away from the moving block (5), a signal receiving device (16) provided on the side wall of the mounting cavity (4) and electrically connected to the heating structure, and a control structure provided between the lead screw (6) and the motor (7) shaft that controls the signal transmitting device (15) to transmit a signal when the two rotate relative to each other or controls the signal transmitting device (15) to stop transmitting a signal when the two are synchronized. When the signal receiving device (16) receives a signal, it controls the heating structure to turn on; when the signal receiving device (16) does not receive a signal, it controls the heating structure to turn off.

2. The electrically retractable car door handle according to claim 1, characterized in that: The control structure includes a normally closed magnetic switch (17) provided on the side of the lead screw (6) away from the moving block (5) and a magnetic component (18) provided on the outer ring wall of the motor shaft (8) that can control the opening and closing of the normally closed magnetic switch (17). A battery (19) is provided on the lead screw (6). The normally closed magnetic switch (17), the signal transmitting device (15) and the battery (19) are connected in series. When the card block (12) is inserted into the card slot (10), the normally closed magnetic switch (17) and the magnetic component (18) face each other to close the heating structure.

3. The electrically retractable car door handle according to claim 1, characterized in that: The signal transmitting device (15) is an infrared emitting tube, and the signal receiving device (16) is an infrared sensor switch.

4. The electrically retractable car door handle according to claim 3, characterized in that: The heating structure includes a heating wire (21) installed inside the handle (2) and a power supply installed inside the door (1). The power supply, infrared sensor switch and heating wire (21) are connected in series.

5. The electrically retractable car door handle according to claim 1, characterized in that: The traction structure includes a pull rope (24) with one end connected to the moving block (5) and the other end connected to either end of the handle (2), and a torsion spring (25) provided between the handle (2) and the receiving groove (3) to control the handle (2) to flip inward and reset when the tension of the pull rope (24) is removed. There is a through groove (26) between the bottom of the receiving groove (3) and the mounting cavity (4) through which the pull rope (24) can pass and move.

6. The electrically retractable car door handle according to claim 1, characterized in that: The transmission structure includes a relief groove (22) recessed on the side of the moving block (5) near the lead screw (6) for inserting and moving the lead screw (6), a nut (23) provided on the side of the moving block (5) near the lead screw (6) and threadedly engaged with the lead screw (6), a guide block (27) protruding on the moving block (5), and a guide groove (28) recessed on the side wall of the mounting cavity (4) for inserting the guide block (27) and moving linearly along the axial direction of the lead screw (6).

7. The electrically retractable car door handle according to claim 6, characterized in that: A positioning sensing structure is provided between the guide block (27) and the guide groove (28) to control the motor (7) to stop rotating when the handle (2) is flipped outward to unlock the car lock or flipped inward to be reset and stored in the receiving groove (3).

8. The electrically retractable car door handle according to claim 7, characterized in that: The positioning sensing structure includes a first micro switch (29) disposed on the side wall of the guide groove (28) away from the receiving groove (3) and a second micro switch (30) disposed on the side wall of the guide groove (28) close to the receiving groove (3). A control module is provided inside the door (1). The first micro switch (29), the second micro switch (30) and the motor (7) are electrically connected to the control module respectively. When the handle (2) is flipped outward to unlock the car, the guide block (27) touches the first micro switch (29); when the handle (2) is flipped inward to reset, the guide block (27) touches the second micro switch (30).

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