CN217269494U - Automobile rotary type stable operation hidden type external-open handle structure - Google Patents
Automobile rotary type stable operation hidden type external-open handle structure Download PDFInfo
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- CN217269494U CN217269494U CN202221022533.6U CN202221022533U CN217269494U CN 217269494 U CN217269494 U CN 217269494U CN 202221022533 U CN202221022533 U CN 202221022533U CN 217269494 U CN217269494 U CN 217269494U
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Abstract
A hidden external-open handle structure for the rotary and stable running of car features that a handle coupling structure is arranged on the handle body, which is coupled with the drive and unlocking pivoted arms on base to generate a combined movement, so unlocking. Specifically, the driving rotating arm can linearly push the handle coupling structure under the driving of the motor to enable the handle of the handle to be screwed out at a constant speed, and then the handle of the handle is continuously screwed out by using external force, so that the handle coupling structure is driven to linearly push the unlocking rotating arm to move to the unlocking position, and then unlocking is completed. The utility model discloses an operation process that makes the hidden door handle of car open is steady, smooth and easy, promotes the life and the user experience of product to the hidden door handle elastic reset structure of car is in the stress state for a long time among the solution current scheme, and hidden door handle motion opening speed at the uniform velocity, easy jamming, the technical problem of easy wearing and tearing.
Description
Technical Field
The utility model relates to a hidden door external-open handle specifically is a hidden external-open handle structure of steady operation of car rotation type.
Background
The hidden door handle arranged on the automobile door can reduce the wind resistance of the automobile in performance and can achieve the effect of attractive appearance. When the existing rotary hidden type external-open handle is subjected to an unlocking instruction, the handle can automatically bounce open under the acting force of a preset elastic reset structure, the handle can be automatically closed through the driving force of a motor when the handle is locked, and the elastic reset structure is in a stressed state when the handle is closed. When the hidden outward opening handle in the prior art is in a closed state, the elastic reset structure is in a stressed state for a long time and is easy to damage, abnormal sound is generated when the handle is flicked, the speed is also uncontrollable, and a user is easily flicked.
In the prior art, the rotation angle of the rotating part and the rotation angle of the handle have no linear relationship and are in non-uniform motion, so that the hidden type externally-opened handle is not stably opened and has the defects of easy clamping stagnation, abrasion and instability, the service life of the hidden type externally-opened handle is shortened, and poor user experience is caused due to non-benign change of man-machine parameters.
Disclosure of Invention
The utility model discloses an operation process that makes the hidden door handle of car open is steady, smooth and easy, promotes the life and the user experience of product to the hidden door handle elastic reset structure of car is in the stress state for a long time among the solution current scheme, and hidden door handle motion opening speed at the uniform velocity, easy jamming, the technical problem of easy wearing and tearing.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a rotary type stable-operation hidden type external-open handle structure of an automobile comprises a handle body 1 with a handle 11, wherein the handle body 1 is rotatably connected to the outer side surface of a base 4 through a handle rotating shaft 13, the handle body 1 provides restoring force for the handle body 1 to rotate to a restoring position through an elastic restoring structure, and a handle coupling structure 12 extending towards the inner side surface direction of the base is arranged on the handle body 1;
the inner side surface of the base is rotatably connected with a driving rotating arm 2 and an unlocking rotating arm 3, and the extending tail end of a handle coupling structure 12 of the handle body 1 is positioned between the driving rotating arm 2 and the unlocking rotating arm 3;
the driving rotating arm 2 is driven by a motor to rotate, and when the driving rotating arm 2 is located at an initial position, the driving rotating arm is just contacted with the extending tail end of the handle coupling structure 12 when the handle body 1 is located at a reset position; when the driving rotating arm 2 is driven by the motor to rotate to the working position, the extended tail end of the handle coupling structure 12 is pushed to be just contacted with the unlocking rotating arm 3 when the handle is positioned at the locking position, and the handle 11 of the handle body 1 rotates to an inclined screwing-out position, namely a position where the handle 11 obliquely extends out of the outer side surface of the base 4;
the handle 11 in the inclined screwed-out position can continue to rotate under the action of external force, and at the moment, the extended tail end of the handle coupling structure 12 continues to push the unlocking rotating arm 3 to the unlocking position, so that unlocking is completed.
Preferably, when the handle body 1 is in the reset position, the outer side surface of the handle 11 of the handle body 1 is flush with the outer side surface of the base 4.
Preferably, the extending end of the handle coupling structure 12 is provided with a left spherical surface 121 and a right spherical surface 122, the driving rotating arm 2 is provided with a first sliding slot 24, the unlocking rotating arm 3 is provided with a second sliding slot 33, the first sliding slot 24 and the second sliding slot 33 are both provided with arc-shaped grooves, the arc-shaped concave curvature of the arc-shaped groove of the first sliding slot 24 is matched with the curvature of the right spherical surface 122, and the arc-shaped concave curvature of the arc-shaped groove of the second sliding slot 33 is matched with the curvature of the left spherical surface 121.
Preferably, a driving rotating arm rotating shaft 23 is fixedly arranged on the base 4, a hanging table 22 is arranged on the driving rotating arm rotating shaft 23, the driving rotating arm 2 is connected with the base 4 through the hanging table 22, the driving rotating arm 2 can rotate around the driving rotating arm rotating shaft 23 under the driving force of a motor, and the driving rotating arm 2 provides restoring force for the driving rotating arm 2 to rotate to the initial position through a driving rotating arm torsion spring 21.
Preferably, the unlocking tumbler 3 can rotate about the axis 34 under the pushing of the extended end of the handle coupling structure 12, and the unlocking tumbler 3 provides a restoring force for the unlocking tumbler 3 to rotate to the operating position by the unlocking tumbler torsion spring 31.
Preferably, the rotation angle of the driving rotating arm 2 around the axis 25 of the driving rotating arm rotating shaft 23 is α, the included angle between the handle 11 and the outer side surface of the base 4 is θ', and a linear relationship exists between the two: where alpha is the angle of rotation of the driving arm 2 about the axis 25 of the driving arm axis of rotation 23,theta' is the included angle between the handle 11 and the outer side surface of the base 4,kis a proportionality coefficient.
Preferably, the linear relationship is: wherein alpha is the rotation angle of the driving rotating arm 2 around the axle center 25 of the rotating shaft 23 of the driving rotating arm, theta 'is the included angle between the handle 11 and the outer side surface of the base 4, and the maximum value of theta' is 23 degrees.
Preferably, the included angle between the handle 11 and the outer side surface of the base 4 is increased by Δ θ, and the unlocking rotating arm 3 rotates around the axis 34 of the unlocking rotating arm torsion spring 31 by β, so that a linear relationship exists between the two: wherein, Delta theta is the added value of the included angle between the handle 11 and the outer side surface of the base 4, beta is the angle of the unlocking rotating arm 3 rotating around the axle center 34 of the unlocking rotating arm torsion spring 31,lis a proportionality coefficient.
Preferably, the linear relationship is that Δ θ is an increased value of an included angle between the handle 11 and the outer side surface of the base 4, β is an angle of rotation of the unlocking rotating arm 3 around the axial center 34 of the unlocking rotating arm torsion spring 31, and the maximum value of β is 16.5 °.
The technical scheme of the utility model following beneficial effect has:
1. the utility model discloses the elasticity reset structure that sets up on the handle body is its reset position when the door is not opened, and the back-out of its handle is realized through the drive rocking arm, can do at the uniform velocity back-out, and the elasticity reset structure is only in the stress state when opening the door, is in not stress state when closing the door, can increase of service life, and at the uniform velocity back-out has avoided popping out the production of situation suddenly, has avoided the noise, also can promote user's use and experience.
2. During the mutual pushing and running processes of the unlocking rotating arm, the driving rotating arm and the handle body, the fitting tracks of the driven part and the driving part are all in uniform motion, so that the clamping stagnation and the inflexible motion of the vehicle door handle during the opening process are effectively reduced, and the vehicle door handle is smoothly and stably opened.
3. The structure is injection molding, effectively improves the product percent of pass, has one-time cost input, is not easy to damage, prolongs the service life and can effectively reduce the production cost.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a relative position diagram of the components of the present invention;
FIG. 2 is a schematic view of the relative positions of the components in the initial position of the present invention;
FIG. 3 is a schematic view of the relative positions of the components of the first process of the present invention;
FIG. 4 is a schematic view of the relative positions of the components of the second process of the present invention;
fig. 5 is a schematic view of the rotation position of the handle of the present invention;
description of the reference numerals: 1. a handle body; 11. a handle; 12. a handle coupling structure; 121. a left spherical surface; 122. a right spherical surface; 13. a handle shaft; 14. a handle torsion spring; 2. driving the rotating arm; 21. a driving rotating arm torsion spring; 22. hanging a table; 23. a rotating shaft of the driving rotating arm; 24. a first chute; 25. an axis; 3. unlocking the rotating arm; 31. unlocking the rotating arm torsion spring; 32. fitting blocks; 33. a second chute; 34. an axis; 4. a base.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.
The utility model discloses an operation process that makes the hidden door handle of car open is steady, smooth and easy, free from extraneous sound, promotes the life and the user experience of product to the hidden door handle of car motion opening speed is uncontrollable among the solution current scheme, easy jamming, abnormal sound, the technical problem of easy wearing and tearing.
The technical scheme of the utility model following beneficial effect has:
1. the utility model discloses the elasticity reset structure that sets up on the handle body is its reset position when the door is not opened, and the back-out of its handle is realized through the drive rocking arm, can do at the uniform velocity back-out, and the elasticity reset structure is only in the stress state when opening the door, is in not stress state when closing the door, can increase of service life, and at the uniform velocity back-out has avoided popping out the production of situation suddenly, has avoided the noise, also can promote user's use and experience.
2. During the mutual pushing and running processes of the unlocking rotating arm, the driving rotating arm and the handle body, the fitting tracks of the driven part and the driving part are all in uniform motion, so that the clamping stagnation and the inflexible motion of the vehicle door handle during the opening process are effectively reduced, and the vehicle door handle is smoothly and stably opened.
3. The structure is injection molding, effectively improves the product percent of pass, has one-time cost input, is not easy to damage, prolongs the service life and can effectively reduce the production cost.
As shown in fig. 1-5, based on the technical problem that will solve above, the utility model discloses a hidden external-open handle structure of car rotation type steady operation, its characterized in that:
including the handle body 1 that has handle 11, handle body 1 passes through handle pivot 13 rotatable coupling on the lateral surface of base 4, and handle body 1 provides the restoring force that rotates to the reset position for handle body 1 through elasticity reset structure, has the handle coupling structure 12 that extends towards the medial surface direction of base on the handle body 1.
The inner side surface of the base 4 is rotatably connected with a driving rotating arm 2 and an unlocking rotating arm 3, and the extending tail end of a handle coupling structure 12 of the handle body 1 is positioned between the driving rotating arm 2 and the unlocking rotating arm 3.
The outer side of the base 4 is the side in contact with the external environment space, and the inner side of the base 4 is the side in contact with the cabin interior space.
The base 4 is fixedly provided with a driving rotating arm rotating shaft 23, the driving rotating arm rotating shaft 23 is provided with a hanging table 22, the driving rotating arm 2 is connected with the base 4 through the hanging table 22, the driving rotating arm 2 can rotate around the axis 25 of the driving rotating arm rotating shaft 23 under the driving force of a motor, when the driving rotating arm is reset, the driving motor rotates reversely, so that the resistance of the driving rotating arm 2 disappears, and the driving rotating arm 2 provides restoring force for the driving rotating arm 2 to rotate to the initial position through a driving rotating arm torsion spring 21.
When the driving rotating arm 2 is located at the initial position, the handle body 1 is located at the reset position, and the handle 11 of the handle body 1 is located at the retracted reset position.
The driving rotating arm 2 is driven by a motor to rotate, and when the driving rotating arm 2 is located at the initial position, the driving rotating arm is just contacted with the extending tail end of the handle coupling structure 12 when the handle body 1 is located at the reset position. When the driving rotating arm 2 is driven by the motor to rotate to the working position, the extending tail end of the handle coupling structure 12 is pushed to be just contacted with the unlocking rotating arm 3 when the handle coupling structure is positioned at the locking position, and the handle 11 of the handle body 1 rotates to the inclined screwing-out position, namely the position that the handle 11 extends out of the outer side surface of the base 4 in an inclined mode.
The unlocking tumbler 3 can be rotated about the axis 34 under the pushing of the extended end of the handle coupling structure 12, the unlocking tumbler 3 and the restoring force for rotating the unlocking tumbler 3 into the operating position being provided by the unlocking tumbler torsion spring 31.
The handle 11 in the inclined screwed-out position can continue to rotate under the action of external force, and at the moment, the extended tail end of the handle coupling structure 12 continues to push the unlocking rotating arm 3 to the unlocking position, so that unlocking is completed.
Preferably, when the handle body 1 is in the reset position, the outer side surface of the handle 11 of the handle body 1 is flush with the outer side surface of the base 4. Therefore, the handle 11 of the handle body 1 is in a flush state of being completely folded and retracted into the base 4 in appearance, and the appearance of the hidden type outward-opening handle can be well guaranteed to be smooth and attractive.
Preferably, the handle coupling structure 12 has a left spherical surface 121 and a right spherical surface 122 at the extending end thereof, the driving rotating arm 2 is provided with a first sliding slot 24, the unlocking rotating arm 3 is provided with a fitting block 32 at a position close to the left spherical surface 121, the fitting block 32 is provided with a second sliding slot 33, the first sliding slot 24 and the second sliding slot 33 are both curved grooves, the curvature of the curved groove of the first sliding slot 24 is matched with the curvature of the right spherical surface 122, and the curvature of the curved groove of the second sliding slot 33 is matched with the curvature of the left spherical surface 121.
The rotation angle of the driving rotating arm 2 around the axle center 25 of the rotating shaft 23 of the driving rotating arm is alpha, the included angle between the handle 11 and the outer side surface of the base 4 is theta', and a linear relation exists between the two: wherein α is driveThe rotating angle of the rotating arm 2 around the axle center 25 of the rotating arm rotating shaft 23 is driven, theta' is the included angle between the handle 11 and the outer side surface of the base 4,kis a proportionality coefficient.
Preferably, the linear relationship is: wherein alpha is the rotation angle of the driving rotating arm 2 around the axle center 25 of the rotating shaft 23 of the driving rotating arm, theta 'is the included angle between the handle 11 and the outer side surface of the base 4, and the maximum value of theta' is 23 degrees.
The added value of the included angle between the handle 11 and the outer side surface of the base 4 is delta theta, the rotation angle of the unlocking rotating arm 3 around the axle center 34 of the unlocking rotating arm torsion spring 31 is beta, and a linear relation exists between the two: wherein, Delta theta is the added value of the included angle between the handle 11 and the outer side surface of the base 4, beta is the angle of the unlocking rotating arm 3 rotating around the axle center 34 of the unlocking rotating arm torsion spring 31,lis a proportionality coefficient.
Preferably, the linear relationship is that Δ θ is an increased value of an included angle between the handle 11 and the outer side surface of the base 4, β is an angle of rotation of the unlocking rotating arm 3 around the axial center 34 of the unlocking rotating arm torsion spring 31, and the maximum value of β is 16.5 °.
When the included angle between the handle 11 and the outer side surface of the base 4 is 35 degrees, and when the rotation angle of the unlocking rotating arm 3 around the axis 34 of the unlocking rotating arm torsion spring 31 is 16.5 degrees, the unlocking rotating arm 3 is located at the unlocking position.
The utility model discloses a hidden external-open handle structure of automobile rotation type steady operation includes two processes when carrying out the door unblock, and first process is electron unblock process, and the second process is mechanical unblock process.
When the door lock of the vehicle door receives an unlocking instruction, a first process, namely an electronic unlocking process, is started, the rotating arm rotating shaft 23 is driven to rotate around the shaft center 25, so that the driving rotating arm 2 is driven to rotate, the right spherical surface 122 is pushed to move through the first sliding groove 24 on the driving rotating arm 2, so that the handle 11 is turned over towards the outer side surface of the base 4 and stops when the handle 11 is turned over outwards until the included angle between the handle 11 and the outer side surface of the base 4 is 23 degrees, at the moment, the handle body 1 is in an inclined turning-out position, and meanwhile, the left spherical surface 121 is attached to the second sliding groove 33 on the fitting block 32;
when the included angle theta' between the handle 11 and the outer side surface of the base 4 is 23 degrees, the driving rotating arm 2 does not rotate continuously, the handle body 1 is in an inclined screwing-out position, and the rotating angle alpha of the driving rotating arm 2 around the axis 25 is 20 degrees.
In a first procedure, the unlocking tumbler 3 is in the locked position, in which the mechanical door lock of the vehicle door is in the locked state.
After the electronic unlocking process is finished, entering a second process, namely a mechanical unlocking process, wherein the mechanical unlocking of the vehicle door is carried out by the external force external pull handle 11, and the left spherical surface 121 is always attached to the second sliding groove 33 in the process of externally pulling the external force external pull handle 11;
the handle body 1 continues to rotate around the handle rotating shaft 13, when the added value of the included angle between the handle 11 and the outer side surface of the base 4 is 12 degrees, the included angle between the handle 11 and the plane of the vehicle door reaches the maximum value, namely 35 degrees, the mechanical unlocking process is completed, and the vehicle door is opened.
After the external force is withdrawn, the unlocking rotating arm 3 and the driving rotating arm 2 are restored to the initial positions and the handle body 1 is restored to the reset position under the action of the driving rotating arm torsion spring 21, the unlocking rotating arm torsion spring 31 and the handle torsion spring 14.
In the specific implementation process, lubricating oil can be coated on the first sliding groove 24 and the second sliding groove 33, so that abrasion and abnormal sound are effectively reduced, and the flexibility of movement is improved.
It is to be understood that the invention has been described with respect to specific embodiments thereof, and that various changes, modifications and equivalents may be made to the features and embodiments without departing from the spirit and scope of the invention, as will be apparent to those skilled in the art. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (9)
1. The hidden type external-open handle structure for the rotary and stable operation of the automobile is characterized by comprising a handle body (1) with a handle (11), wherein the handle body (1) is rotatably connected to the outer side surface of a base (4) through a handle rotating shaft (13), the handle body (1) provides restoring force for the handle body (1) to rotate to a restoring position through an elastic restoring structure, and the handle body (1) is provided with a handle coupling structure (12) extending towards the inner side surface direction of the base;
a driving rotating arm (2) and an unlocking rotating arm (3) are rotatably connected and mounted on the inner side surface of the base, and the extending tail end of a handle coupling structure (12) of the handle body (1) is positioned between the driving rotating arm (2) and the unlocking rotating arm (3);
the driving rotating arm (2) is driven by a motor to rotate, and when the driving rotating arm (2) is located at an initial position, the driving rotating arm is just contacted with the extending tail end of the handle coupling structure (12) when the handle body (1) is located at a reset position; when the driving rotating arm (2) is driven by the motor to rotate to the working position, the extending tail end of the handle coupling structure (12) is pushed to be just contacted with the unlocking rotating arm (3) when the handle coupling structure is positioned at the locking position, and at the moment, the handle (11) of the handle body (1) rotates to an inclined screwing-out position, namely the handle (11) obliquely extends out of the outer side surface of the base (4);
the handle (11) positioned at the inclined screwing-out position can continuously rotate under the action of external force, and at the moment, the extending tail end of the handle coupling structure (12) continuously pushes the unlocking rotating arm (3) to the unlocking position to finish unlocking.
2. The automobile rotary type smooth-running hidden type external-open handle structure is characterized in that when the handle body (1) is in the reset position, the outer side surface of the handle (11) of the handle body (1) is flush with the outer side surface of the base (4).
3. The hidden type external-open handle structure capable of realizing the rotary stable operation of the automobile according to claim 2, wherein a left spherical surface (121) and a right spherical surface (122) are arranged at the extending tail ends of the handle coupling structure (12), a first sliding groove (24) is arranged on the driving rotating arm (2), a second sliding groove (33) is arranged on the unlocking rotating arm (3), the first sliding groove (24) and the second sliding groove (33) are respectively provided with an arc-shaped groove, the arc concave curvature of the arc-shaped groove of the first sliding groove (24) is matched with the curvature of the right spherical surface (122), and the arc concave curvature of the arc-shaped groove of the second sliding groove (33) is matched with the curvature of the left spherical surface (121).
4. The hidden type external-open handle structure for the automobile with the rotating type and the stable operation according to claim 3 is characterized in that a rotating shaft (23) of the driving rotating arm is fixedly arranged on the base (4), a hanging table (22) is arranged on the rotating shaft (23) of the driving rotating arm, the driving rotating arm (2) is connected with the base (4) through the hanging table (22), the driving rotating arm (2) can rotate around the rotating shaft (23) of the driving rotating arm under the driving force of a motor, and the driving rotating arm (2) provides restoring force for the driving rotating arm (2) to rotate to the initial position through a torsion spring (21) of the driving rotating arm.
5. The hidden type external-open handle structure with rotary type and smooth operation for the automobile of claim 4 is characterized in that the unlocking rotating arm (3) can rotate around the axle center (34) under the pushing of the extending end of the handle coupling structure (12), and the unlocking rotating arm (3) provides the restoring force for rotating the unlocking rotating arm (3) to the working position through the unlocking rotating arm torsion spring (31).
6. The hidden type external-open handle structure for automobile rotary type smooth operation according to any one of claims 1 to 5, wherein the rotation angle of the driving rotating arm (2) around the axis (25) of the rotating shaft (23) of the driving rotating arm is α, the included angle between the handle (11) and the outer side surface of the base (4) is θ', and there is a linear relationship between the two: wherein alpha is the rotation angle of the driving rotating arm (2) around the axis (25) of the rotating shaft (23) of the driving rotating arm, theta' is the included angle between the handle (11) and the outer side surface of the base (4),kis a proportionality coefficient.
7. The structure of claim 6, wherein the linear relationship is: wherein alpha is the rotation angle of the driving rotating arm (2) around the axis (25) of the rotating shaft (23) of the driving rotating arm, theta 'is the included angle between the handle (11) and the outer side surface of the base (4), and the maximum value of theta' is 23 degrees.
8. A method according to any one of claims 1 to 5The automobile rotary type stable operation hidden type outward opening handle structure is characterized in that the increase value of the included angle between the handle (11) and the outer side surface of the base (4) is delta theta, the rotation angle of the unlocking rotating arm (3) around the axis (34) of the unlocking rotating arm torsion spring (31) is beta, and a linear relation exists between the handle and the unlocking rotating arm torsion spring: wherein, Delta theta is the added value of the included angle between the handle (11) and the outer side surface of the base (4), beta is the rotating angle of the unlocking rotating arm (3) around the axle center (34) of the unlocking rotating arm torsion spring (31),lis a scaling factor.
9. The hidden type external-open handle structure for automobile rotary type smooth operation according to claim 8 is characterized in that the linear relationship is that Δ θ is the increased value of the included angle between the handle (11) and the outer side surface of the base (4), β is the angle of the unlocking tumbler (3) rotating around the axle center (34) of the unlocking tumbler torsion spring (31), and the maximum value of β is 16.5 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221022533.6U CN217269494U (en) | 2022-04-29 | 2022-04-29 | Automobile rotary type stable operation hidden type external-open handle structure |
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| CN202221022533.6U CN217269494U (en) | 2022-04-29 | 2022-04-29 | Automobile rotary type stable operation hidden type external-open handle structure |
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| CN217269494U true CN217269494U (en) | 2022-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898171A (en) * | 2022-12-22 | 2023-04-04 | 江苏旭顺东明云智能科技有限公司 | Hidden type outer handle and unfolding and retracting method thereof |
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2022
- 2022-04-29 CN CN202221022533.6U patent/CN217269494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898171A (en) * | 2022-12-22 | 2023-04-04 | 江苏旭顺东明云智能科技有限公司 | Hidden type outer handle and unfolding and retracting method thereof |
| CN115898171B (en) * | 2022-12-22 | 2023-09-15 | 江苏旭顺东明云智能科技有限公司 | Hidden outer handle and unfolding and retracting method thereof |
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