Multi-stage self-locking structure of isofix connector

Abstract

The application discloses a multi-gear self-locking structure of an ISOFIX connector, which comprises a connector shell, a plurality of limiting holes arranged uniformly on the top of the connector shell, and a first locking piece and a second locking piece arranged inside the connecting mechanism; a first push rod and a second push rod are arranged at the rear end of a transmission piece and matched with the first locking piece and the second locking piece; when the ISOFIX connector is in an unlocking state, first pawls and second pawls arranged at the top of the first locking piece and the second locking piece are extended out of the limiting holes to realize the locking between the connecting mechanism and the connector shell; after a button is pressed backward, the first pawls and the second pawls are separated from the limiting holes through the cooperation between the first push rod and the second slope of the first locking piece and through the cooperation between the second push rod and the third slope of the second locking piece, so that the connecting mechanism is slid in the connector shell; a plurality of limiting holes are arranged, the multi-gear adjustment of the connecting mechanism can be realized, and thus the optimal position of the ISOFIX connector can be adjusted according to various vehicle models.

Description

Technical Field

[0001] This utility model relates to a multi-position self-locking structure for an ISOFIX connector. Background Technology

[0002] An ISOFIX connector is a device for securing child safety seats to a vehicle. ISOFIX is a new standard for installing child seats in cars, making installation quick and easy. Child seats equipped with ISOFIX can be easily secured to the car's ISOFIX connectors, increasing safety.

[0003] ISOFIX connectors typically include a connector housing, a connecting mechanism, and a button assembly. The connector housing is responsible for securing the child seat. The front end of the connecting mechanism has a locking tab that connects to the rigid connection part of the car seat. The button assembly works with the connecting mechanism, allowing the connecting mechanism to slide inside the connector housing. The connecting mechanism and the connector housing are locked together by a pawl on the connecting mechanism engaging with a limiting hole on the connector housing. Depending on the car model, the button assembly can be used to adjust the relative position between the connecting mechanism and the connector housing to adjust the optimal position of the child seat. However, currently, the connector housing has a limited number of limiting holes, and the connecting mechanism has a limited number of adjustable positions, making it unsuitable for all car models. Utility Model Content

[0004] This invention provides a multi-position self-locking structure for an ISOFIX connector.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] The ISOFIX connector features a multi-position self-locking structure, including a connector housing. Multiple limiting holes are evenly arranged on the top of the connector housing. A first locking plate and a second locking plate are disposed inside the connection mechanism. A first pawl is located at the top of the first locking plate, and a second pawl is located at the top of the second locking plate. The top of the connection mechanism has a first through-hole that engages with the first pawl and a second through-hole that engages with the second pawl. The first pawl and the second pawl extend out of the first through-hole and the second through-hole, respectively, and engage with the limiting holes.

[0007] Preferably, the left and right sides of the connector housing are provided with through sliding holes for connecting the button assembly. The connector housing is provided with a connecting mechanism. The button assembly passes through the sliding holes and is connected to the connecting mechanism. The connecting mechanism includes a first housing and a second housing that cooperate with each other. The internal structure of the connecting mechanism includes a insert and a transmission plate. A tension spring is provided between the insert and the transmission plate. One end of the tension spring is connected to the top of the rear end of the locking plate, and the other end is connected to the top of the front end of the transmission plate. The second screw passes through the sliding holes of the transmission plate, the second housing, and the connector housing from the inside of the connecting mechanism and is fixed to the button rod of the button assembly. The rear end of the transmission plate is provided with a first push rod and a second push rod in sequence. The first locking plate and the second locking plate are respectively fitted on the first push rod and the second push rod.

[0008] Preferably, the first locking piece has a first through hole in the middle, and the bottom of the first through hole has a first inclined surface and a second inclined surface facing each other, with the first inclined surface located at the front end of the second inclined surface; the second locking piece has a second through hole in the middle, the bottom of the second through hole has a first flat surface, and the rear end of the first flat surface has an upwardly inclined third inclined surface.

[0009] Preferably, the bottom of the first locking piece is provided with a first protrusion, and a first spring is sleeved on the first protrusion. The lower end of the first spring abuts against the inner side of the lower end housing of the connecting mechanism, and the upper end is sleeved on the outer side of the first protrusion. The bottom of the second locking piece is provided with a second protrusion, and a second spring is sleeved on the second protrusion. The lower end of the second spring abuts against the inner side of the lower end housing of the connecting mechanism, and the upper end is sleeved on the outer side of the first protrusion. The second spring is sleeved on the outer side of the second protrusion at the bottom end of the second locking piece. The first spring and the second spring respectively push the first locking piece and the second locking piece upward, so that the first pawl and the second pawl are exposed on the outer side of the first through hole and the second through hole, respectively.

[0010] Preferably, the first through hole and the second through hole are spaced apart from each other with different limiting holes, that is, the first through hole is opposite to the first limiting hole, and the second through hole is opposite to the third limiting hole. Therefore, the first pawl and the second pawl are engaged with different limiting holes at intervals.

[0011] Preferably, the first housing and the second housing are fixedly connected by a plurality of rivets; the insert and the transmission plate are both fixed inside the connecting mechanism by the rivets that connect the first housing and the second housing; the transmission plate is provided with one or two or more elongated holes in the middle, the elongated holes are used to pass through the rivets that fix the first housing and the second housing; the first push rod and the second push rod are provided at the rear end of the elongated holes.

[0012] Preferably, one end of the connecting mechanism is provided with a fish-mouth-shaped opening, and the other end of the connecting mechanism is fitted with a fixing member; the end of the connector housing opposite to the fish-mouth-shaped opening is provided with a limiting sleeve, and the front edge of the limiting sleeve is provided with an extension edge extending vertically inward, the extension edge abutting against the outer wall of the housing of the connecting mechanism, so that the connecting mechanism does not abut against the bottom inner side of the connector housing when sliding; the front end of the insert is provided with a locking groove, the locking groove is opposite to the fish-mouth-shaped opening of the connector housing, the upper rear end of the insert is provided with an arc-shaped surface, and the lower part of the arc-shaped surface is provided with an inwardly recessed first limiting groove; the front end of the transmission plate is provided with an inwardly recessed groove, and a limiting plate is engaged at the groove, the limiting plate extending forward to cooperate with the insert; the left and right sides of the limiting plate are respectively engaged in the slots in the inner walls of the first housing and the second housing for fixing the limiting plate.

[0013] Preferably, the bottoms of the first inclined plane and the second inclined plane intersect at an arc shape, the top height of the first inclined plane is higher than the top height of the second inclined plane, and the intersection of the first plane and the third inclined plane is arc-shaped.

[0014] Preferably, the connecting mechanism is connected to the button assembly via a first screw and a second screw. The button assembly includes a button, a button cover, and a button top cover. The button cover has a through button mounting cavity inside, and a sliding groove is provided at the front end of the mounting cavity. The button rod is disposed inside the button, and the rear end of the button is sleeved on the front end of the mounting cavity, with the button rod cooperating with the sliding groove, allowing the button to move within the mounting cavity. A first mounting hole is also provided at the top of the button rod. A second mounting hole is provided inside the button cover, and a second limiting groove is provided at the rear end of the button. A locking plate is connected to the inner side of the button top cover by a torsion spring. The first screw passes through the sliding hole of the first housing, the second housing, and the connector housing from the outside of the first housing and is fixed to the button cover of the button assembly.

[0015] Preferably, the first push rod and the second push rod are arranged opposite to each other on the front and rear sides of the locking plate; one first locking plate is provided and is provided on one side of the second housing, and two second locking plates are provided and are respectively provided on the front and rear sides of the transmission plate, that is, one is provided on one side of the first housing and the other is provided on one side of the second housing; the first through hole is provided on the second housing side, and the second through hole is provided across the first housing and the second housing; the height of the second pawl is higher than the height of the first pawl.

[0016] Compared with the prior art, the multi-position self-locking structure of the ISOFIX connector of this utility model includes a connector in which a first push rod and a second push rod are set at the rear end of the transmission plate to cooperate with a first locking plate and a second locking plate. When the ISOFIX connector is in the unlocked state, the first pawl and the second pawl set at the top of the first locking plate and the second locking plate extend out of the limiting hole to lock the connection mechanism and the connector housing. After pressing the button backward, the first pawl and the second pawl are disengaged from the limiting hole by the first push rod cooperating with the second inclined surface of the first locking plate and by the second push rod cooperating with the third inclined surface of the second locking plate, so that the connection mechanism slides in the connector housing. Moreover, there are several limiting holes, which can realize multi-position adjustment of the connection mechanism, so as to adjust the optimal position of the ISOFIX connector according to various vehicle models. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the multi-position self-locking structure of the ISOFIX connector of this utility model.

[0018] Figure 2 This is an exploded view of the multi-position self-locking structure of the ISOFIX connector of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the connecting mechanism 2 in the unlocked state of the ISOFIX connector multi-position self-locking structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the connecting mechanism 2 in the locked state of the multi-position self-locking structure of the ISOFIX connector of this utility model.

[0021] Figure 5 This is an exploded view of the button assembly of the ISOFIX connector with multi-position self-locking structure of this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 5 As shown, the ISOFIX connector multi-position self-locking structure includes a connector housing 1, which is a hollow square tube. The left and right sides of the connector housing 1 are provided with through sliding holes 11. The sliding holes 11 are used to connect the button assembly 3. The connector housing 1 is provided with a connecting mechanism 2. The button assembly 3 passes through the sliding holes 11 and is connected to the connecting mechanism. The button assembly 3 is used to drive the connecting mechanism 2 to slide inside the connector housing 1.

[0024] Multiple limiting holes 12 are evenly arranged on the top of the connector housing 1.

[0025] The connecting mechanism 2 includes a first housing 21 and a second housing 22 that cooperate with each other. The first housing 21 and the second housing 22 are fixedly connected by a plurality of rivets. After the first housing 21 and the second housing 22 are engaged, one end of the first housing 21 is provided with a fish-mouth-shaped opening 20, and the other end is fitted with a fixing member. The connecting mechanism 2 is located inside the connector housing 1. The end of the connector housing 1 opposite to the fish-mouth-shaped opening 20 is provided with a limiting sleeve 13. The front edge of the limiting sleeve 13 extends vertically inward with an extension edge 131. The extension edge 131 abuts against the outer wall of the housing of the connecting mechanism 2, so that the connecting mechanism 2 does not abut against the inner bottom of the connector housing 1 when sliding, thereby reducing friction and wear.

[0026] The internal structure of the connecting mechanism 2 includes a insert 24 and a transmission plate 23. Both the insert 24 and the transmission plate 23 are fixed inside the connecting mechanism 2 by rivets that connect the first housing 21 and the second housing 22. A tension spring 26 is provided between the insert 24 and the transmission plate 23. One end of the tension spring 26 is connected to the top of the rear end of the locking plate 24, and the other end is connected to the top of the front end of the transmission plate 23. A locking groove 241 is provided at the front end of the insert 24, which is opposite to the fish-mouth-shaped opening 20 of the connector housing 1. The upper rear end of the 24 is provided with an arc-shaped surface 242, and the lower part of the arc-shaped surface 242 is provided with an inwardly recessed first limiting groove 243; the front end of the transmission plate 23 is provided with an inwardly recessed groove 231, and a limiting plate 25 is engaged at the groove 231. The limiting plate 25 extends forward and cooperates with the insert 24. When the connecting mechanism 2 is in the unlocked state, the end of the limiting plate 25 abuts against the arc-shaped surface 242. When the connecting mechanism 2 is in the locked state, the first limiting groove 243 cooperates with the front end of the limiting plate 25.

[0027] The left and right sides of the limiting plate 25 are respectively engaged in the slots in the inner walls of the first housing 21 and the second housing 22 to fix the limiting plate 25.

[0028] The connecting mechanism 2 is connected to the button assembly 3 via a first screw 8 and a second screw 9. The button assembly 3 includes a button 31, a button cover 32, and a button top cover 33. The button cover 32 has a through button mounting cavity 321 inside, and a sliding groove 3211 is provided at the front end of the mounting cavity 321. The button 31 includes a button rod 311 disposed on the inner side. The rear end of the button 31 is sleeved on the front end of the mounting cavity 321, and the button rod 311 cooperates with the sliding groove 3211. The button 31 can move within the mounting cavity 321, that is, the button rod 311 can move within the sliding groove 3211. A first mounting hole is also provided at the top of the button rod 311. A second mounting hole is provided on the inner side of the button cover 32.

[0029] The first screw 8 passes through the sliding hole 11 of the first housing 21, the second housing 22 and the connector housing 1 from the outside of the first housing 21 and is fixed on the button cover 32 of the button assembly 3. The second screw 9 passes through the sliding hole 11 of the transmission plate 23, the second housing 22 and the connector housing 1 from the inside of the connecting mechanism 2 and is fixed on the button rod 311 of the button assembly 3. When the button 31 slides back and forth in the mounting cavity 321, it can drive the transmission plate 23 to move back and forth.

[0030] The rear end of the button 31 is provided with a second limiting groove 312. The inner side of the button top cover 33 is connected to a locking plate 331 by a torsion spring. The torsion spring always pushes the locking plate 331 toward the button 31, and the locking plate 331 always abuts against the button 31. When the connecting mechanism 2 is in the locked state, the locking plate 331 cooperates with the second limiting groove 312. When the connecting mechanism 2 is in the unlocked state, the locking plate 331 leaves the second limiting groove 312 and abuts against the inner side of the button 31.

[0031] The transmission plate 23 has one, two or more elongated holes 232 in the middle. The elongated holes 232 are used to pass through the rivets that fix the first housing 21 and the second housing 22. When the connecting mechanism 2 is in the locked state, the rivet is located at the right end of the elongated hole 232. When the connecting mechanism 2 is in the unlocked state, the rivet is located in the middle of the elongated hole 232.

[0032] The rear end of the elongated hole 232 is provided with a first push rod 233 and a second push rod 234 in sequence. The first push rod 233 and the second push rod 234 are arranged opposite to each other on the front and rear sides of the locking plate 23. The first push rod 233 and the second push rod 234 are respectively provided with a first locking plate 4 and a second locking plate 5. One first locking plate 4 is provided and is provided on one side of the second housing 22. Two second locking plates 5 are provided and are respectively provided on the front and rear sides of the transmission plate 23, that is, one is provided on one side of the first housing 21 and the other is provided on one side of the second housing 22.

[0033] The first locking piece 4 has a first through hole 41 in the middle. At the bottom of the first through hole 41 are opposing first inclined surfaces 411 and second inclined surfaces 412. The first inclined surface 411 is located at the front end of the second inclined surface 412. The bottoms of the first inclined surface 411 and the second inclined surface 412 intersect at an arc shape. The top height of the first inclined surface 411 is higher than the top height of the second inclined surface 412. When the connecting mechanism 2 is in the unlocked state, the first push rod 233 is located at the intersection of the bottoms of the first inclined surface 411 and the second inclined surface 412.

[0034] The second locking piece 5 has a second through hole 51 in the middle, a first plane 511 at the bottom of the second through hole 51, and a third inclined surface 512 that slopes upward at the rear end of the first plane 511. The intersection of the first plane 511 and the third inclined surface 512 is arc-shaped. When the connecting mechanism 2 is in the unlocked state, the second push rod 234 is located at the intersection of the first plane 511 and the third inclined surface 512.

[0035] The top of the first locking piece 4 is provided with a first pawl 43, the top of the second locking piece 5 is provided with a second pawl 53, the top of the connecting mechanism 2 is provided with a first through hole 27 that cooperates with the first pawl 43 and a second through hole 28 that cooperates with the second pawl 53. The first through hole 27 is located on the side of the second housing 22, and the second through hole 28 is provided across the first housing 21 and the second housing 22. The height of the second pawl 53 is higher than the height of the first pawl 43.

[0036] The first through hole 27 and the second through hole 28 are spaced apart and opposite to the different limiting holes 12, that is, the first through hole 27 is opposite to the first limiting hole, and the second through hole 28 is opposite to the third limiting hole. Therefore, the first pawl 43 and the second pawl 53 are spaced apart and engaged with the different limiting holes 12.

[0037] The bottom of the first locking piece 4 has a first protrusion 42, and a first spring 6 is fitted onto the first protrusion 42. The lower end of the first spring 6 abuts against the inner side of the lower housing of the connecting mechanism 2, and the upper end is fitted onto the outer side of the first protrusion 42. The bottom of the second locking piece 5 has a second protrusion 52, and a second spring 7 is fitted onto the second protrusion 52. The lower end of the second spring 7 abuts against the inner side of the lower housing of the connecting mechanism 2, and the upper end is fitted onto the outer side of the first protrusion 42. The second spring 7 is fitted onto the outer side of the second protrusion 52 at the bottom of the two second locking pieces 5. The first spring 6 and the second spring 7 push the first locking piece 4 and the second locking piece 5 upwards, respectively, so that the first pawl 43 and the second pawl 53 are exposed on the outer side of the first through hole 27 and the second through hole 28, respectively. The first pawl 43 and the second pawl 53 cooperate with different limiting holes 12 to lock the connecting mechanism 2 and the connector housing 1.

[0038] When the ISOFIX connector is in the unlocked state, that is, the insert 24 is not connected and locked to the rigid structure of the vehicle, the locking groove 241 at the front end of the insert 24 engages with the ISOFIX anchor point of the vehicle; the first push rod 233 is located at the intersection of the bottom of the first inclined surface 411 and the second inclined surface 412, and the second push rod 234 is located at the intersection of the first plane 511 and the third inclined surface 512. At this time, the first pawl 43 and the second pawl 53 are in the highest position, both exposed outside the limiting hole 12 of the connector housing 1. The button assembly 3 can drive the connecting mechanism 2 to slide inside the connector housing 1 to adjust the gear position. The specific process is as follows: push the button 31 backward, and the button 31 drives the transmission plate. When button 23 moves backward, the first push rod 233 forces the second inclined plane 412 to move downward, and the second push rod 234 forces the third inclined plane 234 to move downward, thereby forcing the first locking piece 4 and the second locking piece 5 downward so that the first pawl 43 and the second pawl 53 leave the limiting hole 12. Thus, pushing the button assembly 3 forward and backward can drive the connecting mechanism 2 to move forward and backward. When the appropriate position is adjusted, button 31 is released. Under the action of tension spring 25, the transmission piece 23 is reset. The first pawl 43 and the second pawl 53 extend out of the limiting hole 12 again under the elastic force of the first spring 6 and the second spring 7 and engage with the limiting hole 12, thereby locking the connecting mechanism 2 and the connector housing 1.

[0039] When adjusted to the appropriate position, push the ISOFIX connector forward. At this time, the insert 24 moves downward counterclockwise, and the first limiting groove 243 rotates upward to face the limiting plate 25. Under the action of the tension spring 26, both the transmission plate 23 and the limiting plate 25 move forward. The limiting plate 25 and the first limiting groove 243 cooperate and lock together. At the same time, the locking groove 241 rotates downward to fully cooperate with the ISOFIX anchor point, and the ISOFIX connector is securely locked inside the vehicle. At this time, the first push rod 233 cooperates with the first inclined surface 411, and the first pawl 43 moves downward away from the limiting hole 12 of the connector housing 1; the distance that the limiting plate 25 and the locking piece 23 move forward is equal to or less than the vertical distance between the highest point and the lowest point of the first inclined surface 411; the distance that the limiting plate 25 and the locking piece 23 move forward is also equal to or less than the length of the first plane 511; the width of the elongated hole 232 is greater than or equal to the vertical distance between the apex of the first inclined surface 411 and the apex of the second inclined surface 412; the height of the first pawl 43 and the second pawl 53 is equal to or less than the vertical distance from the bottom end of the first locking piece 4 and the second locking piece 5 to the inner wall of the bottom end of the connecting mechanism 2.

[0040] During the ISOFIX connector locking process, the transmission plate 23 moves forward, the second screw 9 drives the button 31 to move forward, and the locking plate 331 moves inward under the action of the torsion spring to cooperate with the second locking groove 312, locking the button 31 so that it cannot automatically reset; the outer side of the button cover 32 is also provided with an indicator hole 322, which penetrates the button cover 32 to expose the button 31. In the unlocked state, the indicator hole 322 is red, and in the locked state, the button 31 moves forward to expose a green indicator.

[0041] After the ISOFIX connector is locked, press button 31 again to move the transmission plate 23 backward. The limit plate 25 is moved backward, and the insert 24 rotates upward clockwise. The arc surface 242 abuts against the front end of the limit plate 25, and the connection mechanism 2 returns to the unlocked state.

[0042] This utility model's ISOFIX connector multi-position self-locking structure includes a connector where a first push rod 233 and a second push rod 234 are provided at the rear end of the transmission plate 23 to cooperate with a first locking plate 4 and a second locking plate 5. When the ISOFIX connector is in the unlocked state, the first pawl 43 and the second pawl 53 provided at the top of the first locking plate 4 and the second locking plate 5 extend out of the limiting hole 12 to lock the connection mechanism 2 and the connector housing 1. After pressing the button 31 backward, the first pawl 43 and the second pawl 53 are disengaged from the limiting hole 12 through the cooperation of the first push rod 233 with the second inclined surface 412 of the first locking plate 4 and the cooperation of the second push rod 234 with the third inclined surface 512 of the second locking plate 5, allowing the connection mechanism 2 to slide within the connector housing 1. The limiting hole 12 is provided with several positions, which can realize multi-position adjustment of the connection mechanism 2, thereby adjusting the optimal position of the ISOFIX connector according to various vehicle models.

[0043] Finally, it should be noted that the above embodiments only illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ISOFIX connector with a multi-position self-locking structure, comprising a connector housing (1), characterized in that, The connector housing (1) has a plurality of limiting holes (12) evenly arranged on its top. The connecting mechanism (2) has a first locking piece (4) and a second locking piece (5) inside. The top of the first locking piece (4) has a first pawl (43), and the top of the second locking piece (5) has a second pawl (53). The top of the connecting mechanism (2) has a first through hole (27) that cooperates with the first pawl (27) and a second through hole (28) that cooperates with the second pawl (53). The first pawl (43) and the second pawl (53) extend out of the first through hole (27) and the second through hole (28) respectively and engage with the limiting holes (12) respectively.

2. The ISOFIX connector multi-position self-locking structure according to claim 1, characterized in that, The connector housing (1) has through sliding holes (11) on both sides of its tube wall. The sliding holes (11) are used to connect the button assembly (3). The connector housing (1) has a connecting mechanism (2) inside. The button assembly (3) passes through the sliding holes (11) and is connected to the connecting mechanism (2). The connecting mechanism (2) includes a first housing (21) and a second housing (22) that cooperate with each other. The internal structure of the connecting mechanism (2) includes a insert (24) and a transmission plate (23). A tension spring (26) is provided between the insert (24) and the transmission plate (23). One end of the spring (26) is connected to the top of the rear end of the locking piece (24), and the other end is connected to the top of the front end of the transmission piece (23); the second screw (9) passes through the sliding hole (11) of the transmission piece (23), the second housing (22) and the connector housing (1) from the inside of the connecting mechanism (2) and is fixed on the button rod (311) of the button assembly (3); the rear end of the transmission piece (23) is provided with a first push rod (233) and a second push rod (234) in sequence; the first locking piece (4) and the second locking piece (5) are respectively fitted on the first push rod (233) and the second push rod (234).

3. The ISOFIX connector multi-position self-locking structure according to claim 1 or 2, characterized in that, The first locking piece (4) has a first through hole (41) in the middle, and a first inclined surface (411) and a second inclined surface (412) facing each other are provided at the bottom of the first through hole (41). The first inclined surface (411) is provided at the front end of the second inclined surface (412). The second locking piece (5) has a second through hole (51) in the middle, and a first plane (511) is provided at the bottom of the second through hole (51). A third inclined surface (512) that slopes upward is provided at the rear end of the first plane (511).

4. The ISOFIX connector multi-position self-locking structure according to claim 1, characterized in that, The bottom of the first locking piece (4) is provided with a first protrusion (42), and a first spring (6) is sleeved on the first protrusion (42). The lower end of the first spring (6) abuts against the inner side of the lower end housing of the connecting mechanism (2), and the upper end is sleeved on the outer side of the first protrusion (42). The bottom of the second locking piece (5) is provided with a second protrusion (52), and a second spring (7) is sleeved on the second protrusion (52). The lower end of the second spring (7) abuts against the inner side of the lower end housing of the connecting mechanism (2), and the upper end is sleeved on the outer side of the first protrusion (42). The second spring (7) is sleeved on the outer side of the second protrusion (52) at the bottom of the second locking piece (5). The first spring (6) and the second spring (7) push the first locking piece (4) and the second locking piece (5) upward respectively, so that the first pawl (43) and the second pawl (53) are exposed on the outer side of the first through hole (27) and the second through hole (28) respectively.

5. The ISOFIX connector multi-position self-locking structure according to claim 1 or 4, characterized in that, The first through hole (27) and the second through hole (28) are spaced apart from each other and opposite to the different limiting holes (12), that is, the first through hole (27) is opposite to the first limiting hole, and the second through hole (28) is opposite to the third limiting hole. Therefore, the first pawl (43) and the second pawl (53) are spaced apart and engaged with the different limiting holes (12).

6. The ISOFIX connector multi-position self-locking structure according to claim 2, characterized in that, The first housing (21) and the second housing (22) are fixedly connected by a plurality of rivets; the insert (24) and the transmission plate (23) are both fixed inside the connecting mechanism (2) by the rivets that connect the first housing (21) and the second housing (22); the transmission plate (23) has one or two or more elongated holes (232) in the middle, the elongated holes (232) are used to pass through the rivets that fix the first housing (21) and the second housing (22); the first push rod (233) and the second push rod (234) are located at the rear end of the elongated holes (232).

7. The ISOFIX connector multi-position self-locking structure according to claim 2, characterized in that, One end of the connecting mechanism (2) is provided with a fish-mouth-shaped opening (20), and the other end of the connecting mechanism (2) is fitted with a fixing member; the end of the connector housing (1) opposite to the fish-mouth-shaped opening (20) is provided with a limiting sleeve (13), and the front edge of the limiting sleeve (13) is provided with an extension edge (131) extending vertically inward. The extension edge (131) abuts against the outer wall of the housing of the connecting mechanism (2), so that the connecting mechanism (2) does not abut against the bottom inner side of the connector housing (1) when sliding; the front end of the insert (24) is provided with a locking groove (241), and the locking groove (241) is connected to the connector housing (24). The fish-mouth-shaped openings (20) of the connector housing (1) are opposite each other. An arc-shaped surface (242) is provided on the upper rear end of the insert (24). A first limiting groove (243) is recessed inward below the arc-shaped surface (242). An inward groove (231) is provided at the front end of the transmission plate (23). A limiting plate (25) is engaged at the groove (231). The limiting plate (25) extends forward and cooperates with the insert (24). The left and right sides of the limiting plate (25) are respectively engaged in the slots in the inner walls of the first housing (21) and the second housing (22) to fix the limiting plate (25).

8. The ISOFIX connector multi-position self-locking structure according to claim 3, characterized in that, The bottoms of the first inclined plane (411) and the second inclined plane (412) intersect and the intersection is arc-shaped. The top height of the first inclined plane (411) is higher than the top height of the second inclined plane (412). The intersection of the first plane (511) and the third inclined plane (512) is arc-shaped.

9. The ISOFIX connector multi-position self-locking structure according to claim 2, characterized in that, The connecting mechanism (2) is connected to the button assembly (3) by a first screw (8) and a second screw (9). The button assembly (3) includes a button (31), a button cover (32), and a button top cover (33). The button cover (32) has a through button mounting cavity (321) inside, and a sliding groove (3211) is provided at the front end of the mounting cavity (321). The button (31) includes a button rod (311) disposed on the inner side. The rear end of the button (31) is sleeved on the front end of the mounting cavity (321), and the button rod (311) is matched with the sliding groove (3211). When closed, the button (31) can move within the mounting cavity (321); the top of the button rod (311) is also provided with a first mounting hole; the inner side of the button cover (32) is provided with a second mounting hole, the rear end of the button (31) is provided with a second limiting groove (312), and the inner side of the button top cover (33) is connected to a locking plate (331) by a torsion spring; the first screw (8) passes through the sliding hole (11) of the first housing (21), the second housing (22) and the connector housing (1) from the outside of the first housing (21) and is fixed on the button cover (32) of the button assembly (3).

10. The ISOFIX connector multi-position self-locking structure according to claim 2, characterized in that, The first push rod (233) and the second push rod (234) are arranged opposite to each other on the front and rear sides of the locking plate (23); the first locking plate (4) is provided in one piece and is provided on one side of the second housing (22), and the second locking plate (5) is provided in two pieces and is respectively provided on the front and rear sides of the transmission plate (23), that is, one piece is provided on one side of the first housing (21) and the other piece is provided on one side of the second housing (22); the first through hole (27) is provided on the side of the second housing (22), and the second through hole (28) is provided across the first housing (21) and the second housing (22); the height of the second pawl (53) is higher than the height of the first pawl (43).

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