Two-section type safe opening device for vehicle door

Abstract

The utility model provides a two-section type safety opening device for a vehicle door. The two-section type safety opening device for the vehicle door is provided with a first safety device arranged between a vehicle door frame and a lock catch and a second safety device matched with the first safety device and arranged on the vehicle door and close to a door lock. The first safety device at least comprises a first positioning plate, a first movable hook, an elastic stopper and a resistance piece; the first positioning plate is provided with a first limiting column and a second limiting column; the second safety device further comprises a second positioning plate capable of being connected with the automobile door, a guide box, a sliding arm, a second movable hook, an extension spring, a first limiting piece, a second limiting piece and a limiting block. When the vehicle door is opened, the first safety device can hook and pull the second safety device to limit the opening range of the vehicle door, and when the vehicle door is pulled back, the second safety device is unhooked from the first safety device, so that the vehicle door can be safely opened in a two-section mode, the vehicle door can be opened in a two-section mode more smoothly and is not prone to being clamped, and meanwhile the door opening time is shortened.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle door opening devices, and more particularly to a two-stage safety opening device for vehicle doors that can limit the opening range of the vehicle door. Background Technology

[0002] In recent years, with the improvement of people's living standards, transportation has developed rapidly. With the increase in motorcycles and cars, accidents related to car doors have also increased. The main reason is that car drivers are not careful and open the door whenever they want, without paying any attention to other road users.

[0003] Opening a car door to get out of the car, a seemingly simple action, actually hides unknown dangers. Car drivers often open car doors without paying attention, causing motorcyclists to be startled by the door and slip, or be hit by the door and fall. In more serious cases, they may be run over by a car from behind after falling, resulting in an irreparable tragedy.

[0004] To address the aforementioned issues, the inventor developed an "improved safety device for a two-stage vehicle door safety opening mechanism," which has been patented under Taiwan Patent Publication No. M659980. However, in practical use, the complex structure of this device leads to higher maintenance costs, hindering its widespread adoption and impacting consumer willingness to use it.

[0005] In view of this, how to provide a two-stage safety opening device for car doors that can solve the aforementioned problems has become the subject of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a two-stage safety opening device for car doors that can limit the opening range of the car doors.

[0007] To solve the above problems and achieve the purpose of this utility model, the technical means of this utility model is as follows: a two-stage safety opening device for a car door, which has a first safety device disposed between the door frame and the latch, and a second safety device that cooperates with the first safety device and is installed on the door and adjacent to the door lock.

[0008] The first safety device includes at least a first positioning plate, a first movable hook, a resilient stop, and a resistance element.

[0009] The first positioning plate has an elliptical positioning hole at the top and a positioning circular hole in the middle, for positioning between the door frame and the latch;

[0010] The first movable hook has a Q-shaped swing arm, a receiving hole, a through hole, a groove, and a first hook claw part. The Q-shaped swing arm is arranged at the bottom end of the first positioning plate, and the turning part of the Q-shaped swing arm is pivotally connected with the first positioning plate. The receiving hole is arranged at one end of the Q-shaped swing arm adjacent to the inside of the vehicle. The through hole vertically penetrates the receiving hole. The groove transversely penetrates the receiving hole. The first hook claw part is arranged at the end of the Q-shaped swing arm away from the inside of the vehicle, and has an inverse bevel guide part. The bottom end of the inverse bevel guide part is a first hook opening part. The first hook opening part is arranged in a hook opening shape towards the inside of the vehicle, and the top end is outwardly inclined to form a first lever.

[0011] The elastic stopper is arranged in the through hole, and is used for cooperating with the second safety device to stop and allow the first hook claw part to swing down. A spring is further arranged in the receiving hole and abuts against the elastic stopper.

[0012] One end of the resistance part is vertically arranged at the bottom end of the receiving hole, and the other end of the resistance part abuts against the first positioning plate, and is used for positioning the first movable hook.

[0013] When the vehicle door is opened, the first movable hook hooks and pulls the second safety device, and limits the opening range of the vehicle door. When the vehicle door is pulled back, the first movable hook is disengaged from the second safety device, and the second safety device is disengaged, so that the vehicle door is opened in a two-stage safety mode.

[0014] A first limiting column is vertically arranged on one side of the first positioning plate corresponding to the elastic stopper, and a second limiting column is vertically arranged on one side of the first positioning plate corresponding to the first hook claw part.

[0015] The second safety device further comprises a second positioning plate connected with the vehicle door, a guide box, a sliding arm, a second movable hook, a tensile spring, a first limiting part, a second limiting part, and a limiting block.

[0016] One side of the second positioning plate is arranged on the vehicle door, and the top end is flush with the door lock. The second positioning plate has a first positioning hole arranged at the top end adjacent to the edge of the outside of the vehicle, a second positioning hole arranged at the top end and spaced from the edge of the inside of the vehicle, and a third positioning hole arranged at the top end and in the center. When the vehicle door is closed, the first positioning plate is arranged in a spaced overlapping manner.

[0017] The guide box is arranged at the bottom end of the free side of the second positioning plate, and has a guide groove inside.

[0018] The sliding arm is arranged at the end of the sliding arm away from the inside of the vehicle and slidingly arranged in the guide groove.

[0019] One end of the second movable hook is pivotally connected to the slide arm and can slide in the guide slot, and the other end of the second movable hook protrudes out of the guide slot and is provided with a second hook claw part which can be detachably hooked with the first movable hook at the end protruding out of the guide slot. The second hook claw part has a second hook opening part with a hook opening facing the outward direction of the vehicle and a second lever protruding at the bottom end of the outer side. A trapezoidal clamping block with a slope opposite to the second hook opening part is protruding between the second hook claw part and the pivotally connected end.

[0020] The tension spring is arranged in the guide slot, and one end of the tension spring is connected to the lower side of the pivotally connected end of the second movable hook, and the other end of the tension spring is connected to the end of the guide slot away from the inside of the vehicle.

[0021] The first limiting part is arranged on the lower side of the guide box and has a first elastic sheet. One end of the first elastic sheet is adjacent to and abuts against the second lever, and the other end of the first elastic sheet is U-shaped and inserted into the lower side of the guide box.

[0022] The second limiting part is arranged on the upper side of the guide box and has a second elastic sheet. One end of the second elastic sheet is adjacent to and abuts against the hook opening of the second movable hook, and the other end of the second elastic sheet is U-shaped and inserted into the upper side of the guide box. The limiting block is arranged on the bottom end of the free side of the second positioning plate corresponding to the second lever for limiting the pivoting of the second movable hook.

[0023] More specifically, the guide box has a U-shaped groove formed in the guide slot. The U-shaped groove is recessed with a first positioning groove corresponding to the first elastic sheet and a second positioning groove corresponding to the second elastic sheet.

[0024] More specifically, the first positioning hole and the second positioning hole are arranged in an elliptical shape, and the outer edges are all surrounded by a plurality of secondary positioning holes.

[0025] The third positioning hole is in an inverted T shape for cooperating with an auxiliary positioning block. The auxiliary positioning block is detachable and is arranged on the door lock when the second safety device is arranged on the vehicle door.

[0026] The connection between the guide slot and the tension spring is also provided with a first hook part.

[0027] The connection between the second movable hook and the tension spring is also provided with a second hook part.

[0028] The bottom end side of the pivotally connected part of the slide arm and the second movable hook is protruding with a sliding protrusion, and the end of the slide arm away from the sliding protrusion is provided with a sliding limiting part.

[0029] The guiding box is provided with a sliding limiting groove corresponding to the sliding limiting member, and the sliding limiting member slides in the sliding limiting groove.

[0030] More particularly, the second positioning hole is arranged in a staggered manner above the first positioning hole.

[0031] The auxiliary positioning block further comprises a block body, a clamping block, a perforated groove, an expansion member, an adjusting screw and a clamping version.

[0032] The clamping block is protruded from one side of the bottom end of the block body, the perforated groove is in the shape of a Chinese character K and is arranged in the center of the clamping block, the expansion member is arranged in the perforated groove, one end of the adjusting screw is vertically arranged on the other side of the block body corresponding to the clamping block, the other end of the adjusting screw abuts against the expansion member, and the clamping version is arranged outside the clamping block in the shape of a Chinese character K at the top end and in the shape of an inverted T at the bottom end.

[0033] Compared with the prior art, the utility model has the following effects:

[0034] The improved safety device is arranged between the door frame and the lock catch, cooperates with the safety device arranged near the door lock of the door, enables the door to be opened in a two-stage manner, is not easy to be stuck, shortens the door opening time, simplifies the overall mechanical structure of the improved safety device, facilitates quick maintenance and reduces maintenance cost, is beneficial to the quick promotion and popularization of the utility model, and replaces the traditional two-stage door safety opening device. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a three-dimensional schematic view of the utility model.

[0036] Figure 2 It is a three-dimensional exploded schematic view of the first safety device.

[0037] Figure 3 It is a three-dimensional exploded schematic view of the second safety device.

[0038] Figure 4 It is an implementation schematic view of the first safety device arranged on the door frame.

[0039] Figure 5 It is an implementation schematic view of the second safety device arranged on the door in cooperation with the auxiliary positioning block.

[0040] Figure 6 It is a three-dimensional schematic view of the second safety device in cooperation with the auxiliary positioning block.

[0041] Figure 7Figure 2 is a perspective view of the second safety device cooperating with the auxiliary positioning block.

[0042] The symbols are shown as follows:

[0043] 1 first positioning plate 2024 sliding limiting groove

[0044] 11 elliptical positioning hole 203 sliding arm

[0045] 12 positioning circular hole 2031 sliding protrusion

[0046] 13 first limiting column 2032 sliding limiting member

[0047] 14 second limiting column 204 second movable hook

[0048] 2 first movable hook 2041 second hook claw part

[0049] 21 U-shaped swing arm 204A second hook mouth part

[0050] 22 accommodating hole 204B second push rod

[0051] 23 perforated hole 204C trapezoidal clamping block

[0052] 24 slotted hole 204D second hooking part

[0053] 25 first hook claw part 205 tension spring

[0054] 251 reverse slope guide part 206 first limiting member

[0055] 252 first hook mouth part 2061 first elastic sheet

[0056] 253 first push rod 2062 first limiting groove

[0057] 10 first safety device 207 second limiting member

[0058] 20 second safety device 2071 second elastic sheet

[0059] 201 second positioning plate 2072 second limiting groove

[0060] 2011 first positioning hole 208 limiting block

[0061] 2012 second positioning hole 3 elastic stop

[0062] 2013 third positioning hole 31 spring

[0063] 2014 next positioning hole 4 resistance member

[0064] 202 Guide Box A Door Frame

[0065] 2021 Guide groove B latch

[0066] 2022 C-shaped door with a U-shaped groove

[0067] 2023 First Hook Part D Door Lock

[0068] 100 Two-stage safety opening device for car doors

[0069] 30 Auxiliary positioning block 301 Block-shaped body

[0070] 302 Card Block 303 Perforated Groove

[0071] 304 Expansion Part; 305 Adjusting Screw

[0072] 306 Card Version Detailed Implementation

[0073] like Figures 1 to 7 As shown in the figure, a two-stage safety opening device for a car door is disclosed. The two-stage safety opening device 100 for a car door has a first safety device 10 disposed between the door frame A and the latch B, and a second safety device 20 that cooperates with it and is installed on the door C and adjacent to the door lock D. The first safety device 10 includes at least a first positioning plate 1, a first movable hook 2, an elastic stop 3 and a resistance member 4.

[0074] The first positioning plate 1 has an elliptical positioning hole 11 at the top and a positioning circular hole 12 in the middle, for positioning between the door frame A and the latch B; the first movable hook 2 has a U-shaped swing arm 21, a receiving hole 22, a through hole 23, a slot 24 and a first hook claw portion 25, the U-shaped swing arm 21 is located at the bottom end of the first positioning plate 1, and the turning part of the U-shaped swing arm 21 is pivotally connected to the first positioning plate 1, the receiving hole 22 is provided with an elliptical positioning hole 11 at the top and a positioning circular hole 12 in the middle, for positioning between the door frame A and the latch B; At one end of the U-shaped swing arm 21 adjacent to the vehicle interior, the through hole 23 passes vertically through the receiving hole 22, and the slot 24 passes horizontally through the receiving hole 22. The first hook portion 25 is located at one end of the U-shaped swing arm 21 away from the vehicle interior, and the first hook portion 25 has a reverse inclined guide portion 251. The bottom end of the reverse inclined guide portion 251 is a first hook opening portion 252, which is hook-shaped and faces the vehicle interior, and the top end is obliquely protruding outward to form a first lever 253.

[0075] The elastic stopper 3 is arranged in the through hole 23, and is used to stop the second safety device 20 and let the first hook claw part 25 drop. A spring 31 is arranged in the accommodating hole 22, and one end of the spring 31 abuts against the elastic stopper 3. One end of the resistance piece 4 is vertically arranged at the bottom end of the accommodating hole 22, and the other end of the resistance piece 4 abuts against the first positioning plate 1, and is used to position the first movable hook 2.

[0076] When the door C is opened, the first movable hook 2 hooks and pulls the second safety device 20, and limits the opening range of the door C. When the door C is pulled back, the first movable hook 2 is disengaged from the second safety device 20, and the second safety device 20 is disengaged, so that the door C is opened in two stages.

[0077] The first positioning plate 1 is provided with a first limiting column 13 on one side corresponding to the elastic stopper 3, and is provided with a second limiting column 14 on one side corresponding to the first hook claw part 25.

[0078] The second safety device 20 further comprises a second positioning plate 201 connected with the door C, a guide box 202, a sliding arm 203, a second movable hook 204, a stretching spring 205, a first limiting piece 206, a second limiting piece 207, and a limiting block 208. One side of the second positioning plate 201 is arranged on the door C, and the top end is flush with the door lock D. The second positioning plate 201 is provided with a first positioning hole 2011 on one side of the top end adjacent to the edge of the outside of the vehicle, a second positioning hole 2012 on the top end and spaced from the edge of the inside of the vehicle, and a third positioning hole 2013 in the center of the top end. When the door C is closed, the first positioning plate 1 is in a spaced overlapping state.

[0079] The guide box 202 is arranged at the free side of the bottom end of the second positioning plate 201, and is provided with a guide groove 2021 in the inside. The sliding arm 203 is slidingly arranged in the guide groove 2021 at one end away from the inside of the vehicle. One end of the second movable hook 204 is pivotally connected with the sliding arm 203, and can slide in the guide groove 2021. The other end of the second movable hook 204 protrudes out of the guide groove 2021, and is provided with a second hook claw part 2041 which can be disengaged from the first movable hook 2 at one end protruding out of the guide groove 2021. The second hook claw part 2041 is provided with a second hook mouth part 204A with a hook mouth facing the outside of the vehicle, and a second push rod 204B protruding at the bottom end of the outside. A trapezoidal clamping block 204C is arranged between the second hook claw part 2041 and the pivotally connected end, and the trapezoidal clamping block 204C is provided with a slope facing the second hook mouth part 204A.

[0080] The tensile spring 205 is arranged in the guide groove 2021, and one end of the tensile spring 205 is connected below the pivot joint end of the second movable hook 204, and the other end of the tensile spring 205 is connected at the end of the guide groove 2021 away from the vehicle; the first limiting piece 206 is arranged below the guide box 202, and has a first elastic sheet 2061, one end of the first elastic sheet 2061 is adjacent to and abuts against the second lever 204B, and the other end of the first elastic sheet 2061 is U-shaped and inserted into the upper side of the guide box 202; the second limiting piece 207 is arranged on the upper side of the guide box 202, and has a second elastic sheet 2071, one end of the second elastic sheet 2071 is adjacent to and abuts against the hook mouth of the second movable hook 204, and the other end of the second elastic sheet 2071 is U-shaped and inserted into the upper side of the guide box 202; the limiting block 208 is arranged at the free side of the bottom end of the second positioning plate 201, corresponding to the second lever 204B, for limiting the pivoting of the second movable hook 204.

[0081] Wherein, through the application of the first safety device 10 cooperating with the Q-shaped swing arm 21, the action of the first hook claw part 25 can be accurately controlled, so that it can accurately contact or disengage with the corresponding second safety device 20 when opening and closing the vehicle door C, so that the vehicle door C is opened in a two-stage manner, which is more smooth and not easy to be stuck, and the door opening time is shortened.

[0082] Secondly, using the Q-shaped swing arm 21 as a lever can effectively convert the force applied by the operator to the vehicle door C into the movement of the first hook claw part 25, so that the operator can use smaller force to achieve the action of opening the vehicle door C, thereby reducing the difficulty of opening the vehicle door C. Through the elastic stop 3, it can move up and down at the perforation 23 to control whether the vehicle door C is opened in a two-stage manner.

[0083] Furthermore, since the connection mode of the first positioning plate 1 and the Q-shaped swing arm 21 is detachable, during maintenance or replacement of parts, the disassembly and assembly can be easily carried out, so as to achieve the effects of convenient and rapid repair and replacement and reduce the maintenance cost.

[0084] The two-stage door opening mode of the first safety device 10 and the second safety device 20 refers to the mode in the prior case (Taiwanese Patent M659980 Announcement Number), when the vehicle door C is opened or closed, the second movable hook 204 is pulled or released through the sliding of the sliding arm 203, and the second hook mouth part 204A can be separable hooking or unhooking with the first movable hook 2, so that the vehicle door C presents an open or closed state.

[0085] When the door C is pushed open, the extension spring 205 pulls the second movable hook 204 to pivot towards the original position, and cooperates with the first limiting member 206 and the second limiting member 207 to control the movement thereof, so as to ensure the stability and safety of the operation.

[0086] Through the cooperation of the connecting end of the second movable hook 204 and the extension spring 205, the condition of unhooking is avoided when the second movable hook 204 is pulled to pivot.

[0087] Through the setting of the first limiting column 13 and the second limiting column 14, the first movable hook 2 can be accurately moved on the predetermined track during the opening and closing of the door C, so as to improve the stability of the operation, prevent excessive movement, and reduce the risk of damage and wear.

[0088] Through the setting of the reverse slope guide part 251, the first movable hook 2 can enter and exit more smoothly when contacting the second safety device 20, so as to reduce the resistance during operation, reduce the wear during long-term use, and prolong the service life.

[0089] As shown in Figures 1 to 3 The guide box 202 has a H-shaped groove body 2022 formed in the guide groove 2021; the H-shaped groove body 2022 is concave with a first positioning groove 2062 corresponding to the first elastic sheet 2061, and a second positioning groove 2072 corresponding to the second elastic sheet 2071.

[0090] Through the setting of the first positioning groove 2062 and the second positioning groove 2072, the first elastic sheet 2061 and the second elastic sheet 2071 can be accurately positioned, so as to be stably fixed at the correct position, improve the positioning accuracy, effectively control the movement range and position of the second movable hook 204, and prevent operation errors caused by position deviation.

[0091] Secondly, through the design of the H-shaped groove body 2022, not only the wear caused by friction between components during operation is reduced, but also the stability of the entire device structure is enhanced through physical positioning.

[0092] As shown in Figures 1 to 3As shown, the first positioning hole 2011 and the second positioning hole 2012 are elliptical, and a plurality of secondary positioning holes 2014 are arranged around the outer edge; the third positioning hole 2013 is in the shape of an inverted T, used in cooperation with an auxiliary positioning block 30, which is detachable and positioned on the door lock D, adjacent to the door lock D when the second safety device 20 is installed on the door C; the guide slot 2021 is connected with the extension spring 205, and a first hook portion 2023 is arranged at the connection; the second movable hook 204 is connected with the extension spring 205, and a second hook portion 204D is arranged at the connection; the slide arm 203 is provided with a slide protrusion 2031 at the bottom end side of the pivot connection with the second movable hook 204, and a slide limiting member 2032 is arranged at the end of the slide arm 203 away from the slide protrusion 2031; the guide box 202 is provided with a slide limiting slot 2024 corresponding to the slide limiting member 2032, used for the slide limiting member 2032 to slide therein.

[0093] The cooperation of the first positioning hole 2011, the second positioning hole 2012, and the third positioning hole 2013 enables the second safety device 20 to be more closely combined with the door C during installation, reduces displacement caused by door vibration or impact, and the design of the elliptical first positioning hole 2011 and the second positioning hole 2012 provides flexibility in position adjustment during installation, simplifying the installation process, and the arrangement of a plurality of secondary positioning holes 2014 around the outer edge enhances grip and improves overall stability to prevent loosening caused by vibration or impact.

[0094] Secondly, the application of the first hook portion 2022 enables the extension spring 205 to be securely fixed, ensuring that the extension spring 205 does not come loose and fall off during the opening and closing of the door C.

[0095] Furthermore, the slide limiting member 2032 slides in the slide limiting slot 2023 in the guide box 202, ensuring that the slide arm 203 slides on a predetermined track, preventing excessive sliding and maintaining stability.

[0096] As shown in Figures 1 to 3 The second positioning hole 2012 is arranged lower than the first positioning hole 2011, in an up-down staggered manner.

[0097] The auxiliary positioning block 30 further includes a block-shaped body 301, a clamping block 302, a perforated slot 303, an expansion member 304, an adjustment screw 305, and a clamping version 306.

[0098] The card block 302 is protruded on one side of the bottom end of the block body 301, the through slot 303 is in the shape of a convex letter and is arranged in the center of the card block 302, the expansion member 304 is arranged in the through slot 303, one end of the adjusting screw 305 is vertically arranged on the other side of the block body 301 corresponding to the card block 302, the other end of the adjusting screw 305 abuts against the expansion member 304, and the adjusting screw 305 is used for expanding the card block 302 to be detachably clamped into the door lock D, and the card plate 306 is clamped on the outside of the card block 302 in the shape of a mouth letter at the top end and in the shape of an inverted T letter at the bottom end, and is used for matching the third positioning hole 2013.

[0099] The first positioning hole 2011 and the second positioning hole 2012 are arranged in an up-down staggered manner, so that the stress caused by the opening and closing of the door C can be better dispersed, and the stability and durability of the overall structure are improved.

[0100] Secondly, the auxiliary positioning block 30 is arranged, which helps to accurately position the second safety device 20 relative to the door C and the door lock D, so as to prevent position deviation.

[0101] The auxiliary positioning block 30 cooperates with the second safety device 20, so that the second safety device 20 can be positioned on the door C, the auxiliary positioning block 30 can be clamped into the door lock D, and after the second safety device 20 is fixed, the auxiliary positioning block 30 can be removed.

[0102] The cooperation of the through slot 303, the expansion member 304 and the adjusting screw 305 enables the card block 302 to have a certain adjusting capability, so as to be applied to different door locks C and increase the application range.

[0103] The through slot 303 can be used to cooperate with the expansion member 304, so that the expansion member 304 can be adjusted in position in the card block 302.

[0104] The through slot 303 enables the card block 302 to have structural stability when stressed, reduces material fatigue or damage caused by stress concentration when the door C is frequently operated or subjected to external impact.

[0105] Although the content of the present application has been described in detail above by way of the above embodiments, the present application is not limited to the above embodiments. It should be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present application. For example, the technical contents illustrated in the above embodiments can be combined or changed to become new embodiments, which are also considered to be within the scope of the present application. Therefore, the scope of protection of the present application also includes the scope of the following patent application and the scope defined thereby.

Claims

1. A two-stage safety opening device for a vehicle door, characterized in that: the two-stage safety opening device (100) has a first safety device (10) arranged between a door frame (A) and a lock catch (B), and a second safety device (20) arranged on a door (C) and adjacent to a door lock (D) and cooperating with the first safety device (10); the first safety device (10) comprises at least a first positioning plate (1), a first movable hook (2), an elastic stopper (3) and a resistance member (4); the first positioning plate (1) has an elliptical positioning hole (11) arranged at a top end and a positioning circular hole (12) arranged at a middle portion, for positioning between the door frame (A) and the lock catch (B); the first movable hook (2) has a Q-shaped swing arm (21), a receiving hole (22), a through hole (23), a slot (24) and a first hooking portion (25), the Q-shaped swing arm (21) is arranged at a bottom end of the first positioning plate (1), and a turning portion of the Q-shaped swing arm (21) is pivotally connected to the first positioning plate (1), the receiving hole (22) is arranged at an end of the Q-shaped swing arm (21) adjacent to an inside of the vehicle, the through hole (23) vertically penetrates the receiving hole (22), the slot (24) transversely penetrates the receiving hole (22), the first hooking portion (25) is arranged at an end of the Q-shaped swing arm (21) away from the inside of the vehicle, and has an inverse bevel guiding portion (251), a bottom end of the inverse bevel guiding portion (251) is a first hooking opening portion (252), the first hooking opening portion (252) is arranged in a hooking opening shape towards the inside of the vehicle, and a top end thereof is outwardly inclined to form a first lever (253); the elastic stopper (3) penetrates the through hole (23), for cooperating to stop the second safety device (20) and allowing the first hooking portion (25) to swing downward, and a spring (31) abutting against the elastic stopper (3) is arranged in the receiving hole (22); one end of the resistance member (4) is vertically arranged at a bottom end of the receiving hole (22), and the other end of the resistance member (4) abuts against the first positioning plate (1), for positioning the first movable hook (2); when the door (C) is opened, the first movable hook (2) hooks and pulls the second safety device (20), to limit an opening range of the door (C), when the door (C) is pulled back, the first movable hook (2) is disengaged from the second safety device (20), the second safety device (20) is disengaged, so that the door (C) is opened in two stages; a first limiting column (13) is arranged on a side of the first positioning plate (1) corresponding to the elastic stopper (3), and a second limiting column (14) is arranged on a side of the first positioning plate (1) corresponding to the first hooking portion (25). ​ ​ ​ ​ ​ ​ ​ ​ The second safety device (20) further comprises a second positioning plate (201) connected with the vehicle door (C), a guide box (202), a sliding arm (203), a second movable hook (204), a tension spring (205), a first limiting member (206), a second limiting member (207) and a limiting block (208); The second positioning plate (201) is arranged on one side of the vehicle door (C) and is cut flush with the door lock (D) at the top end, and has a first positioning hole (2011) located at the top end adjacent to the vehicle outer edge side, a second positioning hole (2012) located at the top end and spaced from the vehicle inner edge side, and a third positioning hole (2013) located at the top end center, and the first positioning plate (1) is in a spaced overlapping state when the vehicle door (C) is closed; The guide box (202) is arranged at the bottom end of the free side of the second positioning plate (201), and has a guide groove (2021) inside; The sliding arm (203) is slidingly arranged at the end away from the vehicle interior in the guide groove (2021); One end of the second movable hook (204) is pivotally connected with the sliding arm (203) and can slide in the guide groove (2021), the other end of the second movable hook (204) protrudes out of the guide groove (2021), and at the end protruding out of the guide groove (2021), a second hook claw part (2041) which can be detachably hooked with the first movable hook (2) is arranged, the second hook claw part (2041) has a second hook mouth part (204A) with a hook mouth facing the vehicle outer direction and a second lever (204B) protruding at the outer bottom end, and between the second hook claw part (2041) and the pivotally connected end, a trapezoidal clamping block (204C) with a slope facing the second hook mouth part (204A) is protruding; The tension spring (205) is arranged in the guide groove (2021), and one end of the tension spring (205) is connected with the lower side of the pivotally connected end of the second movable hook (204), and the other end of the tension spring (205) is connected with the end of the guide groove (2021) away from the vehicle interior; The first limiting member (206) is arranged on the lower side of the guide box (202) and has a first elastic sheet (2061), one end of the first elastic sheet (2061) is adjacent to and abuts against the second lever (204B), and the other end of the first elastic sheet (2061) is U-shaped and inserted into the lower side of the guide box (202); The second limiting member (207) is arranged on the upper side of the guide box (202) and has a second elastic sheet (2071), one end of the second elastic sheet (2071) is adjacent to and abuts against the hook mouth of the second movable hook (204), and the other end of the second elastic sheet (2071) is U-shaped and inserted into the upper side of the guide box (202); The limiting block (208) is arranged at the bottom end of the free side of the second positioning plate (201) corresponding to the second lever (204B) for limiting the pivoting of the second movable hook (204).

2. The two-stage safety opening device of claim 1, wherein: The guiding box (202) has a U-shaped groove (2022) formed in the guiding groove (2021); The U-shaped groove (2022) is concave with a first positioning groove (2062) corresponding to the first elastic sheet (2061) and a second positioning groove (2072) corresponding to the second elastic sheet (2071).

3. The two-stage safety opening device of claim 2, wherein: The first positioning hole (2011) and the second positioning hole (2012) are elliptical and surrounded by a plurality of secondary positioning holes (2014) at the outer edge; The third positioning hole (2013) is inverted T-shaped and used for cooperating with an auxiliary positioning block (30) which is detachable and positioned on the door lock (D) so as to be adjacent to the door lock (D) when the second safety device (20) is arranged on the vehicle door (C); The guiding groove (2021) is connected with the extension spring (205) and further provided with a first hook portion (2023); The second movable hook (204) is connected with the extension spring (205) and further provided with a second hook portion (204D); The sliding arm (203) is convex with a sliding protrusion (2031) at the bottom side of the pivot joint with the second movable hook (204), and the sliding arm (203) is provided with a sliding limiting member (2032) at the end away from the sliding protrusion (2031); The guiding box (202) is provided with a sliding limiting groove (2024) corresponding to the sliding limiting member (2032) and used for sliding the sliding limiting member (2032) therein.

4. The two-stage safety opening device of claim 3, wherein: The second positioning hole (2012) is arranged lower than the first positioning hole (2011) and staggered up and down; The auxiliary positioning block (30) further comprises a block-shaped body (301), a clamping block (302), a through-hole groove (303), an expansion member (304), an adjusting screw (305), and a clamping plate (306); The clamping block (302) is convex at the bottom side of the block-shaped body (301), the through-hole groove (303) is convexly arranged at the center of the clamping block (302), the expansion member (304) is arranged in the through-hole groove (303), one end of the adjusting screw (305) is vertically arranged on the other side of the block-shaped body (301) corresponding to the clamping block (302), the other end of the adjusting screw (305) abuts against the expansion member (304) for expanding the clamping block (302) to be detachably clamped into the door lock (D), and the clamping plate (306) is clamped at the top of the clamping block (302) and inversely T-shaped at the bottom for cooperating with the third positioning hole (2013).

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