Hidden car door handle return resistance breaking mechanism and resistance breaking method thereof

Abstract

A first swing arm and a second swing arm are rotatably arranged on a base main body, an actuator is arranged on the base main body, the output end of the actuator is connected with a rotating shaft, and the rotating shaft drives an eccentric cam to rotate towards a first rotating direction a or a second rotating direction b through a driving part; the first swing arm and the second swing arm are in transmission connection through a connecting rod, a roller is rotationally arranged on the first swing arm and is in rolling fit with the outer wall of the eccentric cam, a track rib is arranged on the driving part, a guide column corresponding to the track rib is arranged on the first swing arm, and the inner wall of the track rib is in guide fit with the guide column. The invention has the following advantages and effects: the scheme utilizes a new mechanical structure, and has the effects of more compact structure, more stable and effective matching and good handle return resistance breaking performance.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile door handles, and in particular to a hidden door handle return and resistance breaking mechanism and a resistance breaking method thereof. Background Art

[0002] The existing Chinese patent, with the announcement number CN220151123U, discloses a drive mechanism and reset mechanism for a concealed vehicle door handle. The drive mechanism includes a base, a handle body, an actuator, an eccentric drive unit, a roller, and an intermediate connecting rod. A first swing arm and a second swing arm are connected between the base and the handle body. The eccentric drive unit is connected to the output end of the actuator and rotates synchronously. The roller is rotatably mounted on the first swing arm. The eccentric drive unit contacts the roller and drives the first swing arm to swing. The intermediate connecting rod is connected between the first and second swing arms. The reset mechanism also includes an elastic reset mechanism and a reset drive unit. The reset drive unit and the elastic drive unit first jointly drive the handle body to reset to a first set stroke. Then, the elastic reset mechanism alone drives the handle body to reset to a second set stroke.

[0003] However, the above-mentioned hidden door handle has the following disadvantages: the eccentric driving part of the door handle pulls the middle link through the eccentric link, so that the second swing arm pulls the handle body back to its original position. The link structure involved is relatively complex, and multiple links are prone to jamming. Therefore, it is urgent to develop a breaking structure that can effectively break the resistance during the return process of the handle and has a more compact and effective structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a hidden door handle return and resistance breaking mechanism and a resistance breaking method thereof, which have the effects of more compact structure, more stable and effective cooperation, and good handle return and resistance breaking performance.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A hidden door handle return and resistance breaking mechanism comprises a base body and a handle body, wherein a first swing arm and a second swing arm are rotatably provided on the base body, one end of the handle body is hinged to the first swing arm, and the other end of the handle body is hinged to the second swing arm, and the mechanism is characterized in that it further comprises a driving member, wherein the driving member is provided with an eccentric cam, and the driving member can drive the eccentric cam to rotate in a first rotation direction a or a second rotation direction b, and the first rotation direction a or the second rotation direction b are opposite to each other, the first swing arm and the second swing arm are connected by a connecting rod, and a roller is rotatably provided on a side of the first swing arm close to the eccentric cam, and the handle body has a retracted state and an extended state relative to the base body, when the handle body is in the retracted state, the eccentric cam rotates in the first rotation direction a, the outer wall of the roller rolls with the outer wall of the eccentric cam, and under the linkage action of the first swing arm, the connecting rod and the second swing arm, the handle body is driven to move from the retracted state to the extended state relative to the base body; A first return spring is provided between the first swing arm and the base body, and the first return spring always has a tendency to drive the first swing arm to drive the handle body to return to the retracted state; The driving member is provided with a track rib, and the first swing arm is provided with a guide column corresponding to the track rib. When the handle body is in the extended state, the eccentric cam rotates in the second rotation direction b, and under the guidance of the inner wall of the track rib and the guide column, the first swing arm is driven to drive the handle body to move toward the retracted state.

[0006] By adopting the above technical solution, the eccentric cam rotates in the first rotation direction a, and the rolling cooperation between the eccentric cam and the roller is used to drive the first swing arm to drive the second swing arm to act on the handle body through the connecting rod, so that the handle body moves from the retracted state to the extended state relative to the base body, thereby realizing the opening of the handle body. When the handle body is in the extended state relative to the base body for a long time in freezing weather or dusty weather, the gap between the handle body and the base body or the door sheet metal is frozen or mixed with stones, resulting in the handle body being unable to retract relative to the base body. At this time, the eccentric cam is driven to rotate in the second rotation direction b, and the inner wall of the track rib is used to cooperate with the guide column of the first swing arm to drive the first swing arm to be forced to rotate, so that the side of the handle body close to the first swing arm moves toward the retracted state. At this time, the handle body is close to the second One side of the swing arm is still in an extended state, so that the handle body is retracted in an inclined state relative to the base body or the door sheet metal to achieve the purpose of breaking the obstruction. The present invention utilizes the rolling cooperation between the eccentric cam and the roller to realize the mechanical opening of the handle body, and at the same time, a guiding cooperation between the track rib and the guide column of the first swing arm is added to drive the handle body close to the first swing arm to be forced to retract a distance, thereby achieving the purpose of breaking the obstruction with high force between the handle body and the base body. When the breaking is completed, the eccentric cam rotates in the second rotation direction b, so that the guide column is disengaged from the track rib. At this time, the elastic reset force of the first reset spring can be used to drive the first swing arm to rotate the second swing arm through the connecting rod, so that the handle body is reset to the retracted state, which has the effects of a more compact structure, more stable and effective cooperation, and good handle return and obstruction breaking performance.

[0007] The present invention is further configured as follows: the inner wall of the track rib includes an arc-shaped guide section with a gradual radius, the arc-shaped guide section includes a first end and a second end, and when the eccentric cam rotates in the second rotation direction b, the guide column guides and slides from the first end toward the second end, and the distance between the arc-shaped guide section and the rotation center of the eccentric cam gradually decreases from the first end toward the second end.

[0008] By adopting the above technical solution, when the handle body is in the extended state for a long time and the gap between the handle body and the base body or the door sheet metal is stuck by ice or stones, the eccentric cam is driven to rotate in the second rotation direction b, and the first end portion with a longer distance from the rotation center of the eccentric cam first contacts the guide column. As the eccentric cam rotates, the guide column slides along the arc-shaped guide section of the track rib toward the second end portion, so that the distance between the guide column and the rotation center of the eccentric cam gradually decreases, thereby driving the first swing arm to pull the handle body toward the retracted state.

[0009] The present invention is further configured as follows: the track rib also includes a first guide insertion section and a second guide insertion section located at both ends of the arc-shaped guide section, the first guide insertion section extends along the tangential direction of the first end portion of the arc-shaped guide section, and the second guide insertion section extends along the tangential direction of the second end portion of the arc-shaped guide section.

[0010] By adopting the above technical solution, the further away from the first end point on the first guide insertion section is from the rotation center of the eccentric cam, the greater the distance between the site and the rotation center of the eccentric cam. When the eccentric cam rotates toward the second rotation direction b, the first guide insertion section can be used to ensure that the guide column slides smoothly into the arc-shaped guide section; when the handle body is in the extended state for a long time, and the gap between the handle body and the base body or the door sheet metal is stuck by ice or stone, the roller is at the distal end of the eccentric cam, and the outer wall of the eccentric cam and the roller are separated from each other and do not interfere with each other, driving the eccentric cam to rotate in the first rotation direction a. Since the closer to the second end point on the first guide insertion section is to the rotation center of the eccentric cam, the smaller the distance, the first guide insertion section can be used to ensure that the guide column slides smoothly onto the track rib, so that a section of the first guide insertion section close to the second end cooperates with the guide column to drive the side of the handle body close to the first swing arm toward the retracted state to break the resistance.

[0011] The present invention is further configured as follows: a stop surface is provided on the side wall of the eccentric cam, and a first avoidance groove is provided on the side of the eccentric cam close to the stop surface. When the handle body moves to a retracted state, the eccentric cam passes through the stop surface and the first swing arm to limit the stop, and the roller avoids and cooperates with the first avoidance groove.

[0012] By adopting the above technical solution, the addition of the stop surface can ensure that when the handle body moves to the retracted state, the first swing arm can be positioned with the stop on the side wall of the eccentric cam to prevent the eccentric cam from excessive rotation. The addition of the first avoidance groove can effectively prevent damage caused by rigid collision between the eccentric cam and the first swing arm.

[0013] The present invention is further configured as follows: an angle limiting structure is provided between the base body and the driving member, and when the handle body is in an extended state, the driving member cooperates with the base body limit stop through the angle limiting structure.

[0014] The present invention is further configured as follows: the angle limiting structure includes a limiting block and a stop portion, the limiting block extends radially and is arranged on the side of the driving member, the stop portion is arranged on the base body, and the limiting block cooperates with the stop portion.

[0015] By adopting the above technical solution, the rotation angle of the eccentric cam is limited, thereby preventing the eccentric cam from excessively rotating and interfering with components, thereby preventing the eccentric cam from getting stuck.

[0016] The present invention is further configured as follows: the eccentric cam includes a proximal end and a distal end, the rotation center of the eccentric cam is connected to a rotating shaft, the proximal end is set as the end of the eccentric cam close to the rotating shaft, and the distal end is set as the end of the eccentric cam away from the rotating shaft, the curvature radius of the outer wall of the eccentric cam gradually increases from the proximal end to the distal end, and the track rib is set close to the proximal end of the eccentric cam.

[0017] The present invention is further configured as follows: the first swing arm is provided with a limiting slide groove, the first end of the connecting rod is rotatably connected to the second swing arm, the second end of the connecting rod is fixed with a transmission shaft, and the transmission shaft is slidably arranged in the limiting slide groove and rotatably cooperates with it.

[0018] By adopting the above technical solution, the eccentric cam rotates in the second rotation direction b when breaking the obstruction, and the transmission shaft slides from the first end of the limiting slide groove to the second end. During this process, the first swing arm will only pull the side of the handle body close to the first swing arm to retract inward, and will not act on the pull rod to pull the second swing arm to swing, so that the handle body is retracted in an inclined state relative to the base body or the door sheet metal to achieve breaking the obstruction.

[0019] The present invention is further configured as follows: the handle body is provided with a second avoidance groove corresponding to the first swing arm, and the handle body is avoidance-coordinated with the first swing arm through the second avoidance groove.

[0020] By adopting the above technical solution and adding the second avoidance groove, interference between the first swing arm and the handle body can be avoided during the rotation process.

[0021] Another technical object of the present invention is to provide a method for breaking the resistance of a hidden door handle return resistance mechanism, comprising the following steps: S1: The handle body extends: The eccentric cam rotates in the first rotation direction a, and the rolling cooperation between the eccentric cam and the roller drives the first swing arm to drive the second swing arm through the connecting rod to act on the handle body, so that the handle body moves from the retracted state to the extended state relative to the base body. If the handle body is in the extended state relative to the base body for a long time in freezing weather or dusty weather, the gap between the handle body and the base body or the door sheet metal may be iced or mixed with stones, resulting in the handle body being unable to retract relative to the base body; S2: Breaking resistance: The eccentric cam rotates in the second rotation direction b, and the inner wall of the track rib cooperates with the guide post of the first swing arm, driving the first swing arm to forcibly rotate, causing the side of the handle body close to the first swing arm to move toward the retracted state. At this time, the side of the handle body close to the second swing arm is still in the extended state, causing the handle body to be tilted relative to the base body or the door sheet metal and retracted to break resistance; S3: The handle body returns to its original position: After the resistance is broken, the eccentric cam continues to rotate in the second rotation direction b, and the elastic reset force of the first reset spring is utilized to make the first swing arm drive the second swing arm through the connecting rod to move toward the retracted state of the handle body. Under the joint pulling action of the first swing arm and the second swing arm on the handle body, the handle body is driven to return to the retracted state.

[0022] In summary, the present invention has the following beneficial effects: The first and second swing arms are rotatably arranged on the base body, and an actuator is arranged on the base body, and the output end of the actuator is connected to the rotating shaft, and the rotating shaft drives the eccentric cam to rotate in the first rotation direction a or the second rotation direction b through the driving member, and the first swing arm and the second swing arm are connected by a connecting rod transmission, and a roller is rotatably provided on the first swing arm, and the roller rolls with the outer wall of the eccentric cam, and a track rib is provided on the driving member, and a guide column is provided corresponding to the track rib of the first swing arm. When the eccentric cam rotates in the first rotation direction a, the rolling cooperation between the eccentric cam and the roller is used to drive the first swing arm to drive the second swing arm through the connecting rod to act on the handle body, so that the handle body moves from a retracted state to an extended state relative to the base body, thereby realizing the opening of the handle body. When the handle body is in the extended state relative to the base body for a long time in freezing weather or dusty weather, the gap between the handle body and the base body or the door sheet metal is frozen or mixed with stones, resulting in the handle body being unable to retract relative to the base body, and the eccentric cam rotates in the second rotation direction b, and the track rib is provided. The inner wall of the rib cooperates with the guide post of the first swing arm to drive the first swing arm to rotate forcibly, so that the side of the handle body close to the first swing arm moves towards the retracted state. At this time, the side of the handle body close to the second swing arm is still in the extended state, so that the handle body is tilted relative to the base body or the vehicle door sheet metal and retracted to achieve breaking the resistance. When the breaking is completed, the eccentric cam continues to rotate in the second rotation direction b, so that the guide post is separated from the track rib. At this time, the elastic restoring force of the first return spring can be used to drive the first swing arm to rotate through the connecting rod. Under the joint pulling action of the first swing arm and the second swing arm on the handle body, the handle body is reset to the retracted state. Different from the traditional hidden door handle horizontal out and horizontal in unlocking method, the handle body of the present invention will first be retracted a distance in a tilted state when returning to its position, giving the driver and occupant enough reaction time, which is conducive to quickly retracting the fingers buckled in the handle body, and can achieve the purpose of preventing finger pinching. It has a more compact structure, more stable and effective cooperation, and good handle return and breaking resistance performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the overall structural diagram of the present invention.

[0024] Figure 2 This invention Figure 1 A view from another perspective.

[0025] Figure 3 This is a partial view of the present invention when the base body is located at the stopper position, wherein the actuator is not shown.

[0026] Figure 4 It is an exploded view of the base body and the handle body of the present invention.

[0027] Figure 5 It is an overall exploded view of the present invention.

[0028] Figure 6 It is a schematic diagram of the relative positions of the eccentric cam, the first swing arm, the second swing arm and the connecting rod when the handle body of the present invention is in a retracted state.

[0029] Figure 7 This invention Figure 6 A partial enlarged view of area A in the middle.

[0030] Figure 8 This invention Figure 6 A view from another perspective.

[0031] Figure 9 This invention Figure 8 A partial enlarged view of area B in the middle.

[0032] Figure 10 It is a schematic diagram of the relative positions of the eccentric cam, the first swing arm, the second swing arm and the connecting rod when the handle body of the present invention is in the extended state.

[0033] Figure 11 This invention Figure 10 A view from another perspective.

[0034] Figure 12 This is a schematic diagram showing that the track rib cooperates with the guide column of the present invention and drives the first swing arm to drive the end of the handle body close to the first swing arm to retract relative to the base body, thereby crushing and breaking ice or stones in the gap between the handle body and the base body.

[0035] Figure 13 This invention Figure 12 Schematic diagram from another perspective.

[0036] Figure 14 This invention Figure 12 A partial schematic diagram of the cooperation between the center track rib and the guide column.

[0037] In the figure: 1. base body; 10. gap; 11. stop part; 2. handle body; 21. second avoidance groove; 3. first swing arm; 31. roller; 32. guide column; 33. first return spring; 34. limiting slide groove; 35. first pin; 4. second swing arm; 41. second pin; 411. second return spring; 5. connecting rod; 51. transmission shaft; 60. driving member; 6. eccentric cam; 61. track rib; 611. arc-shaped guide section; 6111. first end; 6112. second end; 612. first guide insertion section; 613. second guide insertion section; 62. stop surface; 621. first avoidance groove; 63. limit block; 64. rotating shaft; 65. actuator. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] A hidden door handle return resistance breaking mechanism, such as Figures 1-14As shown, it includes a base body 1 and a handle body 2, and a gap 10 is formed between the handle body 2 and the base body 1 for the handle body 2 to extend or retract. A first swing arm 3 and a second swing arm 4 are rotatably provided on the base body 1. The first swing arm 3 is rotatably connected to the base body 1 through a first pin 35, and the second swing arm 4 is rotatably connected to the base body 1 through a second pin 41, and a second return spring 411 is provided on the outer sleeve of the second pin 41. The second return spring 411 always has a movement tendency to drive the handle to return to the retracted state. One end of the handle body 2 is hinged to the first swing arm 3, and the other end of the handle body 2 is hinged to the second swing arm 4. It also includes a driving member 60, which is provided with The eccentric cam 6 has a rotating shaft 64 connected to its rotation center, a power input end of the rotating shaft 64 is connected to an actuator 65, and the actuator 65 is connected to the vehicle control system. The actuator 65 drives the rotating shaft 64 to rotate, and the rotating shaft 64 drives the eccentric cam 6 to rotate in a first rotation direction a or a second rotation direction b through a driving member 60, and the first rotation direction a or the second rotation direction b are opposite to each other. The eccentric cam 6 includes a proximal end and a distal end. The proximal end is set as the end of the eccentric cam 6 close to the rotating shaft 64, and the distal end is set as the end of the eccentric cam 6 away from the rotating shaft 64. The curvature radius of the outer wall of the eccentric cam 6 gradually increases from the proximal end to the distal end. The first swing arm 3 and the second swing arm 4 are connected by a connecting rod. 5 transmission connection, the first swing arm 3 is provided with a roller 31 for rotation near the side of the eccentric cam 6. When the handle body 2 is in the retracted state, the eccentric cam 6 rotates in the first rotation direction a. Under the rolling cooperation between the outer wall of the roller 31 and the outer wall of the eccentric cam 6, and the linkage action of the first swing arm 3, the connecting rod 5 and the second swing arm 4, the handle body 2 is driven to move from the retracted state to the extended state relative to the base body 1; the driving member 60 is provided with a track rib 61. In this embodiment, the track rib 61 is arranged near the proximal end of the eccentric cam 6. The first swing arm 3 is provided with a guide post 32 corresponding to the track rib 61. When the handle body 2 is in the extended state, the eccentric cam 6 rotates in the second rotation direction b. 1 is guided by the guide column 32, driving the first swing arm 3 to drive the handle body 2 to move toward the retracted state; a first return spring 33 is provided between the first swing arm 3 and the base body 1, and the first return spring 33 always has a movement tendency to drive the first swing arm 3 to drive the handle body 2 to return to the retracted state. When the resistance is broken, the eccentric cam 6 rotates in the second rotation direction b, so that the guide column 32 is separated from the track rib 61. At this time, the elastic return force of the first return spring 33 can be used to drive the first swing arm 3 to rotate the second swing arm 4 through the connecting rod 5. Under the joint pulling action of the first swing arm 3 and the second swing arm 4 on the handle body 2, the handle body 2 is driven to return to the retracted state.

[0040] like Figure 4-Figure 14As shown, the inner wall of the track rib 61 includes an arc-shaped guide segment 611 with a gradual radius, and the arc-shaped guide segment 611 includes a first end 6111 and a second end 6112. When the eccentric cam 6 rotates in the second rotation direction b, the guide column 32 guides and slides from the first end 6111 to the second end 6112, and the distance between the arc-shaped guide segment 611 and the rotation center of the eccentric cam 6 gradually decreases from the first end 6111 to the second end 6112. When the handle body 2 is in the extended state for a long time and the gap 10 between the handle body 2 and the base body 1 or the door sheet metal is stuck by ice or stone, the roller 31 is at the distal end of the eccentric cam 6. At this time, the roller 31 is driven The eccentric cam 6 is caused to rotate in the second rotation direction b, and the first end portion 6111 with a longer distance from the rotation center of the eccentric cam 6 first contacts the guide post 32. As the eccentric cam 6 rotates, the guide post 32 slides along the arc-shaped guide section 611 of the track rib 61 toward the second end portion 6112, so that the distance between the guide post 32 and the rotation center of the eccentric cam 6 gradually decreases, thereby driving the first swing arm 3 to pull the handle body 2 toward the retracted state; the track rib 61 also includes a first guide insertion section 612 and a second guide insertion section 613 located at both ends of the arc-shaped guide section 611. The first guide insertion section 612 slides along the first end portion of the arc-shaped guide section 611. 6111, the second guide insertion section 613 extends in the tangential direction of the second end 6112 of the arc-shaped guide section 611, and the distance between the position of the second guide insertion section 613 that is farther away from the first end 6111 and the rotation center of the eccentric cam 6 is larger. When the eccentric cam 6 rotates in the second rotation direction b, the second guide insertion section 613 can ensure that the guide column 32 slides smoothly into the arc-shaped guide section 611, thereby realizing the guiding cooperation between the arc-shaped guide section 611 and the guide column 32; in some other embodiments, when the handle body 2 is in the extended state for a long time, and the gap 10 between the handle body 2 and the base body 1 or the door sheet metal is When stuck by ice or stones, the roller 31 is at the distal end of the eccentric cam 6, and the outer wall of the eccentric cam 6 and the roller 31 are separated from each other and do not interfere with each other, driving the eccentric cam 6 to rotate in the first rotation direction a. Since the distance between the position of the first guide insertion section 612 closer to the second end 6112 and the rotation center of the eccentric cam 6 is smaller, the first guide insertion section 612 can ensure that the guide column 32 slides smoothly onto the track rib 61, so that a section of the first guide insertion section 612 close to the second end 6112 cooperates with the guide column 32 for guidance, driving the side of the handle body 2 close to the first swing arm 3 to move toward the retracted state to break the obstruction;In addition, in this embodiment, the side wall of the eccentric cam 6 is provided with a stop surface 62, and a first avoidance groove 621 is provided on the side of the eccentric cam 6 near the stop surface 62. When the handle body 2 moves to the retracted state, the eccentric cam 6 is limited and stopped by the stop surface 62 and the first swing arm 3, and the roller 31 avoids and cooperates with the first avoidance groove 621. The addition of the stop surface 62 ensures that when the handle body 2 moves to the retracted state, the first swing arm 3 can be stopped and positioned against the side wall of the eccentric cam 6, preventing the eccentric cam 6 from excessive rotation. The addition of the first avoidance groove 621 effectively prevents damage caused by rigid collision between the eccentric cam 6 and the first swing arm 3.

[0041] like Figure 3-Figure 5 As shown, an angle limiting structure is provided between the base body 1 and the driving member 60. When the handle body 2 is in the extended state, the driving member 60 cooperates with the base body 1 through the angle limiting structure; the angle limiting structure includes a limiting block 63 and a stop portion 11. The limiting block 63 extends radially and is arranged on the side of the driving member 60. The stop portion 11 is arranged on the base body 1. The cross section of the stop portion 11 is a V-shaped structure. The limiting block 63 cooperates with the stop portion 11 to limit the rotation angle of the eccentric cam 6, thereby preventing the eccentric cam 6 from excessive rotation and interference between components, causing jamming.

[0042] like Figure 5-Figure 14 As shown, the first swing arm 3 is provided with a limiting slide groove 34, the first end of the connecting rod 5 is rotatably connected to the second swing arm 4, and the second end of the connecting rod 5 is fixed with a transmission shaft 51, which is slidably arranged in the limiting slide groove 34 and rotated with it. When breaking the resistance, the eccentric cam 6 rotates in the second rotation direction b, and the transmission shaft 51 slides from the first end of the limiting slide groove 34 to the second end. During this process, the first swing arm 3 will only pull the side of the handle body 2 close to the first swing arm 3 to retract inward, and will not act on the pull rod to pull the second swing arm 4 to swing, so that the handle body 2 is retracted in an inclined state relative to the base body 1 or the door sheet metal, and the extrusion force between the side of the handle body 2 close to the first swing arm 3 and the base body 1 or the door sheet metal is used to break ice or stones; the handle body 2 is provided with a second avoidance groove 21 corresponding to the first swing arm 3, and the handle body 2 avoids and cooperates with the first swing arm 3 through the second avoidance groove 21. The addition of the second avoidance groove 21 can avoid interference between the first swing arm 3 and the handle body 2 during the rotation process.

[0043] The basic working principle of the present invention is as follows: a first swing arm 3 and a second swing arm 4 are rotatably provided on a base body 1, an actuator 65 is provided on the base body 1, an output end of the actuator 65 drives an eccentric cam 6 to rotate in a first rotation direction a or a second rotation direction b via a rotating shaft 64, the first swing arm 3 and the second swing arm 4 are connected by a connecting rod 5, a roller 31 is rotatably provided on the first swing arm 3, the roller 31 rolls in engagement with the outer wall of the eccentric cam 6, a track rib 61 is provided on the eccentric cam 6, and a guide post 32 is provided on the first swing arm 3 corresponding to the track rib 61. When the eccentric cam 6 rotates in the first rotation direction a, the rolling cooperation between the eccentric cam 6 and the roller 31 drives the first swing arm 3 to drive the second swing arm 4 to act on the handle body 2 through the connecting rod 5, so that the handle body 2 moves from the retracted state to the extended state relative to the base body 1, thereby realizing the opening of the handle body 2. When the handle body 2 is in the extended state relative to the base body 1 for a long time in freezing weather or dusty weather, the gap 10 between the handle body 2 and the base body 1 or the door sheet metal is frozen or mixed with stones, resulting in the handle body 2 being unable to move relative to the base body 1. The base body 1 retracts, the eccentric cam 6 rotates in the second rotation direction b, and the inner wall of the track rib 61 cooperates with the guide column 32 of the first swing arm 3 to drive the first swing arm 3 to rotate forcibly, so that the side of the handle body 2 close to the first swing arm 3 moves toward the retracted state. At this time, the side of the handle body 2 close to the second swing arm 4 is still in the extended state, so that the handle body 2 is tilted relative to the base body 1 or the door sheet metal to retract and achieve breaking resistance. When the breaking resistance is completed, the eccentric cam 6 rotates in the second rotation direction b, so that the guide column 32 is separated from the track rib 61 At this time, the elastic restoring force of the first restoring spring 33 can be used to drive the first swing arm 3 to rotate the second swing arm 4 through the connecting rod 5, so that the handle body 2 is restored to the retracted state. Different from the traditional hidden door handle's horizontal extension and horizontal advance unlocking method, the handle body 2 of the present invention will first be retracted a certain distance in an inclined state when returning to its position, giving the driver and passengers enough reaction time, which is conducive to quickly retracting the fingers buckled in the handle body 2, and can achieve the purpose of preventing fingers from being pinched. It has a more compact structure, more stable and effective cooperation, and good handle return resistance performance.

[0044] Another technical object of the present invention is to provide a method for breaking the resistance of a hidden door handle return resistance mechanism, comprising the following steps: S1: The handle body extends: The eccentric cam 6 rotates in the first rotation direction a, and the rolling cooperation between the eccentric cam 6 and the roller 31 drives the first swing arm 3 to drive the second swing arm 4 to act on the handle body 2 through the connecting rod 5, so that the handle body 2 moves from the retracted state to the extended state relative to the base body 1. When the handle body 2 is in the extended state relative to the base body 1 for a long time in freezing weather or dusty weather, the gap between the handle body 2 and the base body 1 or the door sheet metal may be iced or mixed with stones, resulting in the handle body 2 being unable to retract relative to the base body 1; S2: Breaking resistance: The eccentric cam 6 rotates in the second rotation direction b, and the inner wall of the track rib 61 cooperates with the guide post 32 of the first swing arm 3, driving the first swing arm 3 to rotate forcibly, so that the side of the handle body 2 close to the first swing arm 3 moves toward the retracted state. At this time, the side of the handle body 2 close to the second swing arm 4 is still in the extended state, so that the handle body 2 is tilted relative to the base body 1 or the door sheet metal and retracts to break the resistance; S3: The handle body returns to its original position: After the resistance is broken, the eccentric cam 6 continues to rotate in the second rotation direction b, and the elastic reset force of the first reset spring 33 is utilized to make the first swing arm 3 drive the second swing arm 4 to move toward the retracted state of the handle body 2 through the connecting rod 5. Under the joint pulling action of the first swing arm 3 and the second swing arm 4 on the handle body 2, the handle body 2 is driven to return to the retracted state.

[0045] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A hidden door handle return and resistance breaking mechanism, comprising a base body (1) and a handle body (2), wherein a first swing arm (3) and a second swing arm (4) are rotatably provided on the base body (1), one end of the handle body (2) is hinged to the first swing arm (3), and the other end of the handle body (2) is hinged to the second swing arm (4), characterized in that: The invention also includes a driving member (60), wherein an eccentric cam (6) is provided on the driving member (60), and the driving member (60) can drive the eccentric cam (6) to rotate in a first rotation direction a or a second rotation direction b, and the first rotation direction a or the second rotation direction b are opposite to each other. The first swing arm (3) and the second swing arm (4) are connected by a connecting rod (5). A roller (31) is provided on the side of the first swing arm (3) close to the eccentric cam (6). The handle body (2) has a retracted state and an extended state relative to the base body (1). When the handle body (2) is in the retracted state, the eccentric cam (6) rotates in the first rotation direction a, and the outer wall of the roller (31) rolls with the outer wall of the eccentric cam (6). Under the linkage action of the first swing arm (3), the connecting rod (5) and the second swing arm (4), the handle body (2) is driven to move from the retracted state to the extended state relative to the base body (1); A first return spring (33) is provided between the first swing arm (3) and the base body (1), and the first return spring (33) always has a movement tendency to drive the first swing arm (3) to drive the handle body (2) to return to a retracted state; The driving member (60) is provided with a track rib (61), and the first swing arm (3) is provided with a guide column (32) corresponding to the track rib (61). When the handle body (2) is in an extended state, the eccentric cam (6) rotates in a second rotation direction b, and under the guidance and cooperation of the inner wall of the track rib (61) and the guide column (32), the first swing arm (3) is driven to drive the handle body (2) to move toward a retracted state.

2. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: The inner wall of the track rib (61) includes an arc-shaped guide section (611) with a gradually changing radius, and the arc-shaped guide section (611) includes a first end (6111) and a second end (6112). When the eccentric cam (6) rotates in the second rotation direction b, the guide column (32) guides and slides from the first end (6111) toward the second end (6112), and the distance between the arc-shaped guide section (611) and the rotation center of the eccentric cam (6) gradually decreases from the first end (6111) toward the second end (6112).

3. The hidden door handle return resistance breaking mechanism according to claim 2, characterized in that: The track rib (61) further includes a first guide insertion section (612) and a second guide insertion section (613) located at both ends of the arc-shaped guide section (611), wherein the first guide insertion section (612) extends along the tangent direction of the first end section (6111) of the arc-shaped guide section (611), and the second guide insertion section (613) extends along the tangent direction of the second end section (6112) of the arc-shaped guide section (611).

4. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: A stop surface (62) is provided on the side wall of the eccentric cam (6), and a first avoidance groove (621) is provided on a side of the eccentric cam (6) close to the stop surface (62). When the handle body (2) moves to a retracted state, the eccentric cam (6) is limited and stopped by the stop surface (62) and the first swing arm (3), and the roller (31) is avoided and matched with the first avoidance groove (621).

5. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: An angle limiting structure is provided between the base body (1) and the driving member (60). When the handle body (2) is in an extended state, the driving member (60) cooperates with the base body (1) limit stop through the angle limiting structure.

6. The hidden door handle return resistance breaking mechanism according to claim 5, characterized in that: The angle limiting structure comprises a limiting block (63) and a stopper (11); the limiting block (63) extends radially and is arranged on the side of the driving member (60); the stopper (11) is arranged on the base body (1); and the limiting block (63) and the stopper (11) are engaged in a stop manner.

7. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: The eccentric cam (6) includes a proximal end and a distal end. The rotation center of the eccentric cam (6) is connected to a rotating shaft (64). The proximal end is set as an end of the eccentric cam (6) close to the rotating shaft (64), and the distal end is set as an end of the eccentric cam (6) away from the rotating shaft (64). The curvature radius of the outer wall of the eccentric cam (6) gradually increases from the proximal end to the distal end, and the track rib (61) is set close to the proximal end of the eccentric cam (6).

8. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: The first swing arm (3) is provided with a limiting sliding groove (34), the first end of the connecting rod (5) is rotatably connected to the second swing arm (4), the second end of the connecting rod (5) is fixedly provided with a transmission shaft (51), and the transmission shaft (51) is slidably arranged in the limiting sliding groove (34) and rotatably cooperates with it.

9. The hidden door handle return resistance breaking mechanism according to claim 1, characterized in that: The handle body (2) is provided with a second avoidance groove (21) corresponding to the first swing arm (3), and the handle body (2) is matched with the first swing arm (3) in an avoidance manner through the second avoidance groove (21).

10. A method for breaking the resistance of the hidden door handle return resistance mechanism according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The handle body is extended: the eccentric cam (6) rotates in the first rotation direction a, and the rolling cooperation between the eccentric cam (6) and the roller (31) drives the first swing arm (3) to drive the second swing arm (4) to act on the handle body (2) through the connecting rod (5), so that the handle body (2) moves from a retracted state to an extended state relative to the base body (1). When the handle body (2) is in the extended state relative to the base body (1) for a long time in freezing weather or dusty weather, ice or stones may form in the gap between the handle body (2) and the base body (1) or the door sheet metal, causing the handle body (2) to be unable to retract relative to the base body (1); S2: breaking resistance: the eccentric cam (6) rotates in the second rotation direction b, and the inner wall of the track rib (61) cooperates with the guide column (32) of the first swing arm (3) to drive the first swing arm (3) to rotate forcibly, so that the side of the handle body (2) close to the first swing arm (3) moves toward the retracted state. At this time, the side of the handle body (2) close to the second swing arm (4) is still in the extended state, so that the handle body (2) is retracted in an inclined state relative to the base body (1) or the door sheet metal to achieve breaking resistance; S3: Handle body returns to its original position: After the resistance is broken, the eccentric cam (6) continues to rotate in the second rotation direction b, and the elastic reset force of the first reset spring (33) is used to make the first swing arm (3) drive the second swing arm (4) to move toward the retracted state of the handle body (2) through the connecting rod (5). Under the joint pulling action of the first swing arm and the second swing arm on the handle body, the handle body (2) is driven to return to the retracted state.

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