Hidden door handle emergency pop-up device

Abstract

The present invention discloses a hidden door handle emergency ejection device, comprising a handle cover and a door handle concealed within the handle cover. One end of the door handle is rotatably mounted on the handle cover via a hollow shaft. The shaft has a shape memory alloy drive assembly connected to the vehicle's power supply located within the shaft's cavity. An elastic ejection assembly is located at the hinged joint between the handle cover and the door handle, which ejects the door handle from the handle cover after a power outage. While retaining the conventional electric control function of the hidden handle, the present invention adds a mechanically redundant structure for emergency ejection in the event of a power outage. This ensures that even if a power outage occurs during an accident, the door handle can still be ejected and the door can be opened by pulling the door handle, thereby buying time for rescue.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and in particular relates to a hidden door handle pop-up device. Background Art

[0002] With the popularity of new energy vehicles, hidden door handles have become a mainstream design because they can enhance the streamlined shape of the vehicle body and reduce wind resistance. However, existing technologies still have obvious drawbacks, such as the risk of failure due to power outages. It is impossible to directly pull the handle to open the door before the door is unlocked electronically. The system relies too much on the onboard circuit to control the door unlocking and the handle ejection. Once the car loses power, the onboard circuit will completely fail, and the door will be difficult to unlock. This situation often occurs in new energy vehicle accidents today. When a collision, fire, or other traffic accident occurs, it is very easy to cause the car to lose power, causing the electronic control system in the car to be paralyzed, making it impossible for the electric door handle to eject, and rescue personnel unable to open the door in time, greatly increasing the difficulty of rescue and escape. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology and provide a hidden door handle emergency pop-up device that can still pop out the door handle after the car is powered off.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A hidden door handle emergency pop-up device comprises a handle cover and a door handle that can be hidden in the handle cover, one end of the door handle is rotatably arranged on the handle cover via a rotating shaft, the rotating shaft is a hollow structure, a shape memory alloy drive assembly connected to the vehicle power supply is provided in the inner cavity of the rotating shaft, an elastic pop-up assembly is provided at the hinge between the handle cover and the door handle, which makes the door handle pop out from the handle cover after the vehicle power is cut off, when the shape memory alloy drive assembly is in the energized state, the elastic pop-up assembly remains in the energy storage state, when the power is cut off, the shape memory alloy drive assembly is deformed and acts on the elastic pop-up assembly, and the elastic pop-up assembly releases energy to make the door handle pop out.

[0006] In the above-mentioned hidden door handle emergency pop-up device, preferably, the elastic pop-up assembly includes a pop-up spring, a first stop structure is provided on the handle cover, and a second stop structure is provided on the door handle. When the shape memory alloy drive assembly is in the power-on state, the tail end of the pop-up spring is clamped on the stop surface of the first stop structure. When the shape memory alloy drive assembly is in the power-off state, the shape memory alloy drive assembly is deformed and acts on the pop-up spring, causing the tail end of the pop-up spring to move upward and break away from the stop surface of the first stop structure, reaching the stop surface of the second stop structure, releasing the elastic force to drive the door handle to rotate and pop out.

[0007] In the above-mentioned hidden door handle emergency pop-up device, preferably, the elastic pop-up assembly further includes a sleeve, the pop-up spring is arranged in the sleeve, and the pop-up spring and the sleeve are both sleeved on the rotating shaft.

[0008] In the above-mentioned hidden door handle emergency pop-up device, preferably, the side of the sleeve is provided with an opening that facilitates the tail end of the pop-up spring to extend outward without affecting the pop-up spring driving the door handle to rotate and pop out, and the bottom of the sleeve is provided with a lower base for cooperating with the shape memory alloy drive assembly.

[0009] In the above-mentioned hidden door handle emergency pop-up device, preferably, the upper tail end of the pop-up spring is fixed on the rotating block, and the lower tail end of the pop-up spring is clamped on the first stop structure when the shape memory alloy drive assembly is in the energized state.

[0010] In the above-mentioned hidden door handle emergency pop-up device, preferably, the inner cavity of the second stop structure is semicircular, and the sleeve can be rotatably arranged at the second stop structure; when the shape memory alloy drive assembly is in the energized state, the stop surfaces of the first stop structure and the second stop structure remain on the same plane.

[0011] In the above-mentioned hidden door handle emergency pop-up device, preferably, a mechanical pull-wire unlocking assembly is connected to the upper end of the rotating shaft, a baffle groove is formed in the upper middle portion of the rotating shaft, and the shape memory alloy drive assembly includes a baffle. When the shape memory alloy drive assembly is powered on, the baffle is located in the rotating shaft, and the door handle is rotatably arranged relative to the rotating shaft. When the shape memory alloy drive assembly is powered off, the baffle moves upward, extends from the baffle groove, and engages with the door handle, causing the door handle, the rotating shaft, and the mechanical pull-wire unlocking assembly to rotate synchronously. The width and height of the baffle grooves at both ends of the rotating shaft are slightly larger than the baffles to ensure that the baffles can extend out of the baffle grooves.

[0012] In the above-mentioned hidden door handle emergency pop-up device, preferably, the shape memory alloy drive assembly also includes a shape memory alloy spring, a rotating base and a telescopic rod, the shape memory alloy spring is arranged between the rotating base and the telescopic rod, the baffle is arranged on the outer wall of the telescopic rod through an elastic member, the rotating shaft is arranged on the rotating base, the shape memory alloy spring is connected to the vehicle power supply through an on-board power supply wire, when the shape memory alloy spring is in the energized state, the shape memory alloy spring is in a contracted state, and the baffle and the telescopic rod are both in the inner cavity of the rotating shaft, when the shape memory alloy spring is in the de-energized state, the shape memory alloy spring expands, drives the telescopic rod and the baffle to move upward, and causes the baffle to extend from the baffle groove.

[0013] In the above-mentioned hidden door handle emergency pop-up device, preferably, the mechanical pull wire unlocking assembly includes a rotating block and a mechanical pull wire, one end of the mechanical pull wire is connected to the rotating block, and the other end is connected to the vehicle door lock mechanism, and the elastic pop-up assembly is clamped between the rotating block and the door handle; a rotating block shaft hole is provided at the center of the rotating block, a cross groove is provided on the surface of the rotating block shaft hole, and a cross protrusion is provided on the upper end of the rotating shaft to cooperate with the cross groove.

[0014] In the above-mentioned hidden door handle emergency pop-up device, preferably, the baffle grooves are symmetrically provided with a pair, the baffles are also symmetrically provided with a pair, and the handle shaft hole of the door handle is provided with a baffle slot that matches the baffle.

[0015] In the above-mentioned hidden door handle emergency pop-up device, preferably, the door handle is provided with a rack, the handle cover is provided with a rotary starter, the rotary starter is connected to a drive gear, and the rack and the drive gear are engaged; the handle cover is also provided with a sliding groove, the sliding groove is provided with a slider, the rotary starter and the drive gear are provided on the slider; the handle cover is also provided with a motor driver for unlocking the vehicle door lock mechanism.

[0016] The concealed door handle emergency pop-up device of the present invention is activated only when the vehicle experiences a power outage. In the inactive state, a shape-memory alloy spring connects to the power supply of the on-board circuit system. When the vehicle is powered on and operating normally, the shape-memory alloy spring is in a contracted state due to power supply, allowing the door handle to rotate relative to the rotating shaft. The on-board circuit controls the motor to unlock the door and eject or retract the door handle, without affecting the normal operation of the concealed door handle. When the vehicle experiences a power outage, the shape-memory alloy spring loses its contracted state maintained by power supply and begins to expand, pushing the telescopic rod upward. When the shape-memory alloy spring reaches its maximum expansion, the baffle extends and inserts into the baffle slot and the baffle retaining slot of the door handle (the door handle and the rotating shaft are now an integral rotating structure). Simultaneously, the baffle rises, pushing the sleeve upward, triggering the pop-up spring to eject the door handle. Pulling the ejected door handle drives the rotating block to rotate and pulls the mechanical pull wire, which unlocks the door lock mechanism connected to it. This ensures that even if the vehicle loses power during an accident, people outside the vehicle can still open the door and conduct rescue.

[0017] In the concealed door handle emergency pop-up device of the present invention, a first stop structure is provided on the handle cover. When the emergency pop-up device is inactive, the shape memory alloy spring is in a retracted state. In this state, the telescopic rod remains at the bottom end of the rotating shaft, the baffle and the pop-up spring are inactive, and the baffle is located within the rotating shaft (not inserted into the baffle slot). The tail end of the pop-up spring abuts against the first stop structure, preventing the pop-up spring from releasing its elastic force. A second stop structure is provided on the door handle. When the emergency pop-up device is activated, the pop-up spring is compressed upward by the sleeve, causing the tail end of the pop-up spring to gradually rise and leave the first stop structure. When the tail end of the pop-up spring reaches the second stop structure, it applies a driving force to the second stop structure, causing the door handle to be ejected under the elastic force. In the concealed door handle emergency pop-up device of the present invention, the handle shaft hole, rotating block, shape memory alloy drive assembly, sleeve, and handle cover shaft hole are located on the same axis. When the emergency pop-up device is activated, pulling the door handle causes the rotating shaft and rotating block to rotate in unison at a predetermined angle along the axis.

[0018] In the concealed door handle emergency ejection device of the present invention, the vehicle's onboard circuit system is energized, causing the shape memory alloy spring's contact current to heat up to a temperature above the shape-changing temperature, maintaining the shape memory alloy spring in a non-expanded state (austenite phase). Initially, an external force is applied to the shape memory alloy spring to an expanded state. The shape memory alloy spring is then quickly placed in a coolant for quenching and cooling, rapidly transforming it into a martensite phase. This fixes the deformed expanded state, thereby maintaining the shape memory alloy spring's contact current in a contracted state. When the vehicle's onboard circuit system is de-energized, the shape memory alloy spring returns to its expanded state.

[0019] While retaining the conventional electric control function of the hidden handle, the present invention adds a mechanical redundant structure for emergency pop-up in case of power failure. This ensures that even if the vehicle suffers a power failure during an accident, the door handle can still be popped out and the door can be opened by pulling the door handle, thus buying time for rescue.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] The present invention utilizes a concealed door handle emergency pop-up device, employing a concealed handle design that retains the traditional concealed handle's electrically controlled door unlocking while incorporating some mechanical redundancy. By cleverly integrating a shape-memory alloy drive assembly with a mechanical mechanism, when the vehicle is powered on and operating normally, the shape-memory alloy drive assembly is retracted, deactivating the emergency pop-up mechanism. The concealed door handle continues to unlock and retract via the vehicle's onboard electrical control motor. However, in the event of a power outage, such as a collision or fire, the shape-memory alloy drive assembly expands, activating the emergency pop-up mechanism and allowing the elastic pop-up assembly to automatically eject the door handle. This dual-function design allows the concealed door handle to function normally when powered on, while also effectively resolving the problem of conventional concealed door handles being unable to open the door due to a power outage and electronic control system failure. This provides valuable time for occupants to escape and for those outside to be rescued, significantly reducing the risk of casualties caused by an inability to open the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the hidden door handle emergency pop-up device of the present invention in an activated state.

[0024] Figure 2 yes Figure 1 A magnified detail of point A in the middle.

[0025] Figure 3 It is an exploded schematic diagram of the hidden door handle emergency pop-up device of the present invention (hidden handle cover).

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0027] Figure 5 yes Figure 3A partial enlarged view of point C in the middle.

[0028] Figure 6 It is a cross-sectional view of the hidden door handle emergency pop-up device of the present invention in an activated state (hidden handle cover).

[0029] Figure 7 It is a structural schematic diagram of the handle cover in the hidden door handle emergency pop-up device of the present invention.

[0030] Figure 8 Schematic diagram of the hidden door handle emergency pop-up device of the present invention in a hidden state (not activated).

[0031] Figure 9 2 is a schematic diagram of the hidden door handle emergency pop-up device of the present invention in a hidden state (not activated) from another angle.

[0032] Figure 10 yes Figure 9 Enlarged detail of point D in the middle.

[0033] Figure 11 It is a cross-sectional view of the hidden door handle emergency pop-up device of the present invention in an inactive state (hidden handle cover).

[0034] Figure 12 It is a structural schematic diagram of the rotating shaft in the hidden door handle emergency pop-up device of the present invention.

[0035] Figure 13 It is a structural schematic diagram of the sleeve in the hidden door handle emergency pop-up device of the present invention.

[0036] Figure 14 This is a diagram of the rotating shaft, rotating block, and mechanical cable being connected as one (the baffle extends out of the baffle slot) of the present invention.

[0037] Legend

[0038] 1. Handle cover; 11. Handle hidden groove; 12. Wire groove; 13. First stop structure; 14. Handle cover shaft hole; 15. Sliding groove;

[0039] 2. Door handle; 21. Rack; 22. Baffle slot; 23. Second stop structure; 24. Handle shaft hole;

[0040] 3. Shape memory alloy drive assembly; 32. Baffle; 33. Telescopic rod; 34. Shape memory alloy spring; 35. Rotating base; 36. On-board power supply wire;

[0041] 4. Rotating block; 41. Rotating block shaft hole; 42. Cross groove;

[0042] 5. Mechanical wire drawing;

[0043] 6. Pop-up spring;

[0044] 7. Sleeve; 71. Sleeve shaft hole; 72. Lower base;

[0045] 8. Motor driver;

[0046] 9. Rotary starter; 91. Drive gear; 92. Slider;

[0047] 10. Rotating shaft; 101. Baffle groove; 102. Cross protrusion. DETAILED DESCRIPTION

[0048] To facilitate understanding of the present invention, the present invention will be described in more comprehensive and detailed form below in conjunction with the accompanying drawings and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0049] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0050] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0051] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0052] Example:

[0053] like Figures 1-14As shown, the hidden door handle emergency pop-up device of this embodiment includes a handle cover 1 and a door handle 2 that can be hidden in the handle cover 1. A handle hiding groove 11 is provided inside the handle cover 1, and the handle hiding groove 11 has enough space to accommodate the door handle 2 to rotate and hide at a certain angle. A handle cover axis hole 14 is provided at the bottom of the handle cover 1, and a wire groove 12 is provided on the surface of the handle cover 1 for installing a mechanical pull wire 5. One end of the door handle 2 is rotatably mounted on the handle cover 1 via a rotating shaft 10. The rotating shaft 10 passes through the handle shaft hole 24 to install the door handle 2 in the handle hidden groove 11. The rotating shaft 10 is a hollow structure. A shape memory alloy drive component 3 connected to the vehicle power supply is provided in the inner cavity of the rotating shaft 10. An elastic pop-up component is provided at the hinge between the handle cover 1 and the door handle 2 to make the door handle 2 pop out from the handle cover 1 after the vehicle is powered off. When the shape memory alloy drive component 3 is powered on, the elastic pop-up component remains in an energy storage state. When the shape memory alloy drive component 3 is powered off, it deforms and acts on the elastic pop-up component. The elastic pop-up component releases energy to make the door handle 2 pop out.

[0054] like Figure 2 As shown, in this embodiment, the elastic pop-up assembly includes a pop-up spring 6 and a sleeve 7. The pop-up spring 6 is arranged in the sleeve 7, and the pop-up spring 6 and the sleeve 7 are both sleeved on the rotating shaft 10. The sleeve 7 is placed above the handle shaft hole 24, and the pop-up spring 6 and the sleeve 7 are clamped between the rotating block 4 and the door handle 2. A first stop structure 13 is provided on the handle cover 1, and a second stop structure 23 is provided on the door handle 2. When the shape memory alloy drive assembly 3 is in the energized state, the tail end of the pop-up spring 6 is clamped on the stop surface of the first stop structure 13 (the upper tail end of the pop-up spring 6 is fixed on the rotating block 4, and the lower tail end of the pop-up spring 6 is clamped on the first stop structure 13 when the shape memory alloy drive assembly 3 is in the energized state). When the shape memory alloy drive assembly 3 is in the de-energized state, the shape memory alloy drive assembly 3 is deformed and acts on the sleeve 7 and the pop-up spring 6, so that the tail end of the pop-up spring 6 moves upward and breaks away from the stop surface of the first stop structure 13, reaches the stop surface of the second stop structure 23, and releases the elastic force to drive the door handle 2 to rotate and pop out.

[0055] like Figure 13 As shown, in this embodiment, the side of the sleeve 7 is provided with an opening for facilitating the tail end of the pop-up spring 6 to extend outward without affecting the pop-up spring 6 driving the door handle 2 to rotate and pop out, and the center of the sleeve 7 is provided with a sleeve shaft hole 71 for passing the rotating shaft 10, and the bottom of the sleeve 7 is provided with a lower base 72 for cooperating with the baffle 32.

[0056] like Figure 4As shown, in this embodiment, the inner cavity of the second stop structure 23 is semicircular, and the sleeve 7 can be rotatably arranged at the second stop structure 23; when the shape memory alloy drive assembly 3 is in the energized state, the stop surfaces of the first stop structure 13 and the second stop structure 23 remain on the same plane.

[0057] like Figure 3 As shown, in this embodiment, a mechanical pull-wire unlocking assembly is connected to the upper end of the rotating shaft 10. A baffle groove 101 is provided in the upper middle portion of the rotating shaft 10. The shape memory alloy drive assembly 3 includes a baffle 32. When the shape memory alloy drive assembly 3 is powered on, the baffle 32 is located in the rotating shaft 10, and the door handle 2 is rotated relative to the rotating shaft 10. At this time, the shape memory alloy drive assembly 3 does not affect the normal operation of the motor ejection and electric unlocking assembly. When the shape memory alloy drive assembly 3 is powered off, the baffle 32 moves upward, extends from the baffle groove 101, and engages with the door handle 2, causing the door handle 2, the rotating shaft 10, and the mechanical pull-wire unlocking assembly to rotate synchronously. At this time, rotating the door handle 2 can drive the rotating block 4 and the mechanical pull wire 5 to move, thereby unlocking the vehicle door lock mechanism. More specifically, the shape memory alloy drive assembly 3 also includes a shape memory alloy spring 34, a rotating base 35 and a telescopic rod 33. The rotating base 35 is arranged in the handle cover shaft hole 14, the shape memory alloy spring 34 is arranged between the rotating base 35 and the telescopic rod 33, the baffle 32 is arranged on the outer wall of the telescopic rod 33 through an elastic member (when the baffle 32 is located at the baffle groove 101, the baffle 32 will extend from the baffle groove 101), the rotating shaft 10 is arranged on the rotating base 35, the shape memory alloy spring 34 is connected to the vehicle power supply through the vehicle power supply wire 36, when the shape memory alloy spring 34 is powered on, the shape memory alloy spring 34 is in a contracted state, and the baffle 32 and the telescopic rod 33 are both in the inner cavity of the rotating shaft 10, when the shape memory alloy spring 34 is powered off, the shape memory alloy spring 34 expands, driving the telescopic rod 33 and the baffle 32 to move upward, and causing the baffle 32 to extend from the baffle groove 101.

[0058] like Figure 3 、 Figure 5 、 Figure 14 As shown, in this embodiment, the mechanical pull wire unlocking assembly includes a rotating block 4 and a mechanical pull wire 5. One end of the mechanical pull wire 5 is connected to the rotating block 4, and the other end is connected to the vehicle door lock mechanism. The rotating block 4 rotates while pulling the mechanical pull wire 5 to rotate; a rotating block shaft hole 41 is provided at the center of the rotating block 4, and a cross groove 42 is provided on the surface of the rotating block shaft hole 41. The upper end of the rotating shaft 10 is provided with a cross protrusion 102 that cooperates with the cross groove 42 to facilitate the synchronous rotation of the rotating block 4 and the rotating shaft 10.

[0059] like Figure 4 、 Figure 12As shown, in this embodiment, a pair of baffle grooves 101 are symmetrically provided, and a pair of baffles 32 are also symmetrically provided. A baffle slot 22 that matches the baffle 32 is provided on the handle shaft hole 24 of the door handle 2, so that the baffle 32 and the door handle 2 can be snapped into an integrated structure.

[0060] like Figure 1 As shown, in this embodiment, the door handle 2 is provided with a rack 21 at the end away from the grip. The handle cover 1 is provided with a rotary actuator 9, which is connected to a drive gear 91, with the rack 21 meshing with the drive gear 91. The handle cover 1 also has a sliding slot 15, with a slider 92 mounted on it. The rotary actuator 9 and the drive gear 91 are mounted on the slider 92, and the slider 92 moves in conjunction with the drive gear 91. The handle cover 1 also includes a motor driver 8 for unlocking the vehicle door lock mechanism. The rotary actuator 9 controls the rotation of the drive gear 91, which in turn drives the rack 21 to move the door handle 2 out or back out. The motor driver 8 is mounted on the handle cover 1. It is connected to the vehicle's electrical circuitry and contains a sensor. After the door handle 2 is ejected by the drive gear 91, the sensor senses pressure or tension on the door handle 2, and the motor driver 8 unlocks the vehicle door, achieving electronically controlled unlocking. The rotary starter 9, motor driver 8, etc. are used to connect to the vehicle circuit, so as to realize the pop-up of the door handle 2 and the unlocking of the door when the vehicle is normally powered on.

[0061] like Figures 1-6 As shown in the figure, the overall structure of the hidden door handle emergency pop-up device of this embodiment is shown. The emergency pop-up device is activated only when the vehicle is powered off. When the vehicle encounters an accident and the power is cut off, the vehicle power supply wire 36 stops supplying power, and the shape memory alloy spring 34 begins to expand (as shown in FIG. Figure 6 As shown in FIG, the emergency pop-up device is activated. During the expansion process, the shape memory alloy spring 34 pushes the telescopic rod 33 upward, and the baffle 32 is completely extended out of the baffle groove 101 until it is inserted into the baffle slot 22, thereby completing the connection between the rotating shaft 10 and the door handle 2 for synchronous rotation. At the same time, the top of the rising baffle 32 pushes the lower base 72 of the sleeve 7 to compress the pop-up spring 6. When the lower tail end of the pop-up spring 6 leaves the first stop structure 13 and reaches the position of the second stop structure 23 (as shown in FIG. Figure 2As shown), the door handle 2 is ejected by the elastic force. At this time, the door handle 2 is pulled, and the door handle 2 drives the rotating shaft 10 to rotate. The rotating block 4 connected to the top of the rotating shaft 10 and the mechanical pull wire 5 also rotate accordingly. The mechanical pull wire 5 is pulled to unlock the vehicle door lock mechanism connected thereto, thereby enabling the vehicle door to be opened even when the power is off. In this embodiment, the handle shaft hole 24, the rotating block shaft hole 41 and the rotating shaft 10 are located on the same axis. When the emergency pop-up device is activated, after the door handle 2 is pulled, the rotating shaft 10 and the rotating block 4 follow the same axis and rotate at the same angle. In this embodiment, the rotating shaft 10, the rotating block 4 and the mechanical pull wire 5 can be regarded as an integrated linkage mechanism after the connection is completed (such as Figure 14 shown).

[0062] like Figures 8-11 As shown, when the vehicle is powered on and operating normally, the shape memory alloy spring 34 is connected to the vehicle power supply wire 36, and the shape memory alloy spring 34 is in a power-on contracted state (as shown in FIG. Figure 11 As shown), the emergency pop-up device is in the inactive state, the telescopic rod 33 drives the baffle 32 to abut against the inside of the rotating shaft 10, the baffle 32 is not inserted into the baffle slot 22, and the shape memory alloy drive assembly 3 does not affect the normal operation of the handle. At this time, the door handle 2 can rotate along the rotating shaft 10, and when the door handle 2 rotates, it will not drive the rotating shaft 10 to rotate, nor will it drive the mechanical pull wire 5 unlocking assembly to rotate. The door handle 2 is controlled by the on-board circuit to drive the motor to unlock the door and pop out or retract the door handle 2. In this embodiment, the emergency pop-up device is in the inactive state, and the lower tail end of the pop-up spring 6 abuts against the first stop structure 13 (as shown in FIG. Figure 10 As shown), it does not affect the popping out of the door handle 2. When the vehicle is powered on and operating normally, pulling the door handle 2 does not drive the rotating shaft 10 and the rotating block 4 to rotate.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hidden door handle emergency pop-up device, comprising a handle cover (1) and a door handle (2) that can be hidden in the handle cover (1), characterized in that: One end of the door handle (2) is rotatably mounted on the handle cover (1) via a rotating shaft (10). The rotating shaft (10) is a hollow structure. A shape memory alloy drive assembly (3) connected to the vehicle power supply is provided in the inner cavity of the rotating shaft (10). An elastic pop-up assembly is provided at the hinge between the handle cover (1) and the door handle (2) to enable the door handle (2) to pop out from the handle cover (1) after the vehicle is powered off. When the shape memory alloy drive assembly (3) is powered on, the elastic pop-up assembly remains in an energy storage state. When the shape memory alloy drive assembly (3) is powered off, it deforms and acts on the elastic pop-up assembly. The elastic pop-up assembly releases energy to enable the door handle (2) to pop out.

2. The hidden door handle emergency pop-up device according to claim 1, characterized in that: The elastic pop-up component includes a pop-up spring (6), a first stop structure (13) is provided on the handle cover (1), and a second stop structure (23) is provided on the door handle (2). When the shape memory alloy drive component (3) is in a power-on state, the tail end of the pop-up spring (6) is clamped on the stop surface of the first stop structure (13). When the shape memory alloy drive component (3) is in a power-off state, the shape memory alloy drive component (3) is deformed and acts on the pop-up spring (6), so that the tail end of the pop-up spring (6) is separated from the stop surface of the first stop structure (13) and reaches the stop surface of the second stop structure (23), releasing the elastic force to drive the door handle (2) to rotate and pop out.

3. The hidden door handle emergency pop-up device according to claim 2, characterized in that: The elastic pop-up assembly further comprises a sleeve (7), the pop-up spring (6) is arranged in the sleeve (7), and both the pop-up spring (6) and the sleeve (7) are sleeved on the rotating shaft (10).

4. The hidden door handle emergency pop-up device according to claim 3, characterized in that: The side of the sleeve (7) is provided with an opening for facilitating the tail end of the pop-up spring (6) to extend outward without affecting the pop-up spring (6) driving the door handle (2) to rotate and pop out, and the bottom of the sleeve (7) is provided with a lower base (72) for cooperating with the shape memory alloy drive assembly (3).

5. The hidden door handle emergency pop-up device according to claim 3, characterized in that: The inner cavity of the second stop structure (23) is semicircular, and the sleeve (7) is rotatably arranged at the second stop structure (23); when the shape memory alloy drive assembly (3) is in an energized state, the stop surfaces of the first stop structure (13) and the second stop structure (23) remain on the same plane.

6. The hidden door handle emergency pop-up device according to claim 1, characterized in that: The upper end of the rotating shaft (10) is connected to a mechanical pull-wire unlocking assembly, and a baffle groove (101) is provided in the upper middle portion of the rotating shaft (10). The shape memory alloy drive assembly (3) includes a baffle (32). When the shape memory alloy drive assembly (3) is in a powered-on state, the baffle (32) is located in the rotating shaft (10), and the door handle (2) is rotatably arranged relative to the rotating shaft (10). When the shape memory alloy drive assembly (3) is in a powered-off state, the baffle (32) moves upward, extends from the baffle groove (101), and engages with the door handle (2), so that the door handle (2), the rotating shaft (10), and the mechanical pull-wire unlocking assembly rotate synchronously.

7. The hidden door handle emergency pop-up device according to claim 6, characterized in that: The shape memory alloy drive assembly (3) further comprises a shape memory alloy spring (34), a rotating base (35) and a telescopic rod (33), wherein the shape memory alloy spring (34) is arranged between the rotating base (35) and the telescopic rod (33), the baffle (32) is arranged on the outer wall of the telescopic rod (33) through an elastic member, the rotating shaft (10) is arranged on the rotating base (35), the shape memory alloy spring (34) is connected to the vehicle power supply through an on-board power supply wire (36), and when the shape memory alloy spring (34) is in a powered state, the shape memory alloy spring (34) is in a contracted state, and the baffle (32) and the telescopic rod (33) are both in the inner cavity of the rotating shaft (10), and when the shape memory alloy spring (34) is in a powered-off state, the shape memory alloy spring (34) expands, drives the telescopic rod (33) and the baffle (32) to move upward, and causes the baffle (32) to extend from the baffle slot (101).

8. The hidden door handle emergency pop-up device according to claim 6, characterized in that: The mechanical pull-wire unlocking assembly comprises a rotating block (4) and a mechanical pull wire (5), one end of the mechanical pull wire (5) is connected to the rotating block (4), and the other end is connected to the vehicle door lock mechanism, and the elastic pop-up assembly is clamped between the rotating block (4) and the vehicle door handle (2); a rotating block shaft hole (41) is provided at the center of the rotating block (4), a cross groove (42) is provided on the surface of the rotating block shaft hole (41), and a cross protrusion (102) is provided at the upper end of the rotating shaft (10) to match the cross groove (42).

9. The hidden door handle emergency pop-up device according to claim 6, characterized in that: A pair of baffle grooves (101) are symmetrically provided, and a pair of baffles (32) are also symmetrically provided. A baffle slot (22) matching the baffle (32) is provided on the handle shaft hole (24) of the door handle (2).

10. The hidden door handle emergency pop-up device according to any one of claims 1 to 9, characterized in that: The door handle (2) is provided with a rack (21), the handle cover (1) is provided with a rotary starter (9), the rotary starter (9) is connected to a drive gear (91), and the rack (21) and the drive gear (91) are meshed; the handle cover (1) is also provided with a sliding groove (15), the sliding groove (15) is provided with a slider (92), the rotary starter (9) and the drive gear (91) are arranged on the slider (92); the handle cover (1) is also provided with a motor driver (8) for unlocking the vehicle door lock mechanism.

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