Double-end Isofix interface connector

Abstract

The invention discloses a double-end Isofix interface connector, and the connector comprises an installation housing which is provided with crocodile mouths at two ends; the lock heads are hinged to the two ends of the mounting shell; the pair of connecting pieces can be respectively linked with the corresponding lock heads; the unlocking operation piece is provided with a pair of operation rods which are used for respectively controlling the connecting pieces corresponding to the unlocking operation piece during unlocking; when the lock head at one end is changed from the unlocking position to the locking position, the connecting piece corresponding to the lock head is linked to abut against the lock head for locking, the lock head at the other end is still located at the unlocking position, and at the moment, the connector is in a using state. When the lock head at the locking position needs to be changed into the unlocking position, the unlocking operation piece is operated to enable the operation rod to control the connecting piece corresponding to the operation rod to be linked with the lock head so as to cancel locking of the lock head, the lock head at the other end is still located at the unlocking position, and at the moment, the connector is in a non-use state. The device is simple in structure, easy to operate, convenient to use and high in overall structural stability and safety.

Description

Technical Field

[0001] The invention relates to a double-head Isofix interface connector. Background Art

[0002] With the popularization of safety awareness, people have an increasing demand for vehicle safety seats. When choosing a safety seat, parents not only have requirements for the safety performance of the seat, but also pay more attention to its functional mode and usage time. For this reason, full-group safety seats came into being. Full-group safety seats can meet the needs of rear-facing safety seats for infants aged 0-1, and can also meet the needs of forward-facing safety seats for children aged 1-12. In order to meet both forward-facing and rear-facing installation requirements, the existing full-group safety seats are mostly split-type, which include a base and a seat body installed on the base. The base is fixed to the vehicle seat through Isofix. The seat body suitable for different age groups is switched to meet the needs of children of all groups. However, the split full-group seat has a large overall size and heavy weight because the seat body and the base are independent of each other, which makes it very inconvenient to carry and operate.

[0003] In order to overcome the above defects, Isofix connectors that can realize the front-to-back installation of integrated safety seats have appeared. For example, the Chinese authorized invention patent (CN201310432424.0) discloses a forward and rear-facing car seat fixing device, which includes a frame with a sliding guide rail, two locking parts that can slide along the sliding guide rail and two joysticks for controlling the locking parts respectively. The two locking parts can realize the front-to-back installation of the integrated safety seat. Considering the different sizes of vehicle seats of different brands of cars, the locking part is fixed by sliding to different positions on the sliding guide rail to make its position adjustable, and the fixing or sliding of the locking part relative to the sliding guide rail is controlled by two joysticks respectively, that is, each locking part is controlled by one joystick. As a result, the car seat fixing device has the following defects:

[0004] (1) Each locking part is controlled by a joystick, which has a complex structure, cumbersome operation and inconvenient use.

[0005] (2) Two locking parts are independently arranged on the frame and can slide along the guide rails of the frame respectively. Each locking part is fixed by inserting a support rod into the spaced sliding hole of the sliding guide rail to locate the relative position of the side locking part and the car seat, which is inconvenient to operate. Summary of the invention

[0006] The object of the present invention is to provide a double-headed Isofix interface connector which has a simple structure, simple operation and convenient use.

[0007] The object of the present invention is achieved by the following technical measures: A double-ended Isofix interface connector, characterized in that it includes:

[0008] Install the housing with alligator mouths at both ends;

[0009] A pair of lock heads are hinged at two ends of the mounting housing, and the pair of lock heads have a locking position for engaging with the locking rod of the car seat to close the crocodile mouth and an unlocking position for canceling the engagement to open the crocodile mouth;

[0010] A pair of connecting members are located in the mounting housing and between the pair of lock heads, and can be linked with the corresponding lock heads respectively;

[0011] An unlocking operating member, which is disposed on the mounting housing and has a pair of operating rods for respectively controlling corresponding connecting members when unlocking;

[0012] When the lock head at one end changes from the unlocked position to the locked position, the connecting piece corresponding to the lock head is linked to contact the lock head to lock, and the lock head at the other end is still in the unlocked position. At this time, the connector is in use;

[0013] When the lock head in the locked position needs to be changed to the unlocked position, the unlocking operating member is operated to make the operating rod control the corresponding connecting member and the lock head to cancel the lock, and the lock head at the other end is still in the unlocked position. At this time, the connector is in a non-use state.

[0014] The pair of connectors of the present invention both have positioning structures for limiting the relative positions of the connector and the child seat when in use;

[0015] When the connector is not in use, both positioning structures are in a positioning state;

[0016] In a non-use state, the unlocking operating member is operated to allow the two operating rods to control the corresponding connecting members to release the positioning state of the two positioning structures, and the position of the child seat relative to the connector can be adjusted at this time;

[0017] When the connector changes from a non-use state to a use state, that is, when the lock head at one end changes from an unlocked position to a locked position, the positioning state of the positioning structure on the corresponding connecting piece is released, and at the same time, the positioning structure on the connecting piece corresponding to the lock head at the other end remains in a positioning state.

[0018] The pair of connecting members of the present invention are in the first position and the second position when the corresponding lock head is in the unlocking position and the locking position, and respectively abut against the first part and the second part of the lock head. The connecting member and the corresponding lock head are connected by a tension spring. When the lock head changes between the unlocking position and the locking position, the connecting member is pulled by the tension spring to change between the first position and the second position in linkage and respectively abut against the first part and the second part of the lock head.

[0019] The lock head described in the present invention is a sheet-like body, and the outer side of the lock head has an opening for accommodating the car seat lock rod, the bottom of the opening has a protrusion for cooperating with the car seat lock rod, the outer end of the opening is a hook portion bent inwardly, the inner bottom of the lock head has a recessed portion and a convex portion above the recessed portion, the convex portion is the first portion of the lock head, and the recessed portion is the second portion of the lock head.

[0020] The connecting member described in the present invention is a rod member, which is composed of an arc-shaped rod segment, a cross rod segment and a special-shaped groove connected in sequence. The outer end of the arc-shaped rod segment abuts against the first part and the second part of the lock head. Each operating rod is adapted to pass through the special-shaped groove of the corresponding connecting member. The operating rod has a third position and a fourth position relative to the special-shaped groove. When the lock head is in the unlocking position and the locking position respectively, the operating rod is in the third position and the fourth position in the special-shaped groove.

[0021] The special-shaped groove described in the present invention is an inclined groove, the bottom end of the special-shaped groove is the third position, and the upper part of the special-shaped groove is the fourth position. When the connecting member is converted from the first position to the second position, the corresponding operating rod slides from the bottom end to the upper part relative to the special-shaped groove.

[0022] The positioning structure of the present invention is a block arranged on the top surface of the transverse rod section of the connecting piece, the inner side edge of the block is a vertical surface, and the outer side edge is an inclined surface. A long strip opening corresponding to the block is provided on the top surface of the mounting shell. The positioning state of the block is that the block passes through the opening and is engaged in the clamping hole provided on the car seat. The positioning state of the block is released when the block is out of the clamping hole.

[0023] The unlocking operating member of the present invention comprises a base body, a first button body and a second button body arranged on the base body, the first button body and the second button body respectively having an operating rod, and two pairs of opposite long strip sliding holes are arranged on the two side walls of the mounting shell, each operating rod extends into a pair of sliding holes and can move along the sliding holes, when the lock head is in the unlocking position and the locking position, the corresponding operating rod is at the outer end of the sliding hole, and when the lock head at one end needs to be changed from the locking position to the unlocking position, the unlocking operating member is operated to control the operating rod corresponding to the lock head to move from the outer end of the sliding hole to the inner end, and at the same time drive the connecting member to cancel the resistance to the lock head and release the lock, and at the same time control the other operating rod to move from the outer end of the sliding hole to the inner end and move along the oblique side of the special-shaped groove to press the connecting member downward to make the clamping block disengage from the clamping hole, at this time, the position of the child seat relative to the connector can be adjusted, and after the force on the unlocking operating member is canceled, the two operating rods move from the inner end of the sliding hole to the outer end, and at the same time the connecting member is pulled to the first position by the tension spring.

[0024] The length of the opening on the mounting shell of the present invention satisfies the displacement stroke of the card block in the opening when the lock head is changed from an unlocked state to a locked state, at which time the card block moves to the outer end of the opening, and at the same time satisfies the displacement stroke of the card block in the opening when the operating lever moves from the fifth position to the sixth position during the process of the lock head being changed from a locked state to an unlocked state, at which time the card block moves to the inner end of the opening.

[0025] The present invention has a fixing frame fixed on the child seat installed on the outside of the connector, the top surface of the fixing frame has a card hole, and the connector can slide in the fixing frame along the arrangement direction of the card hole, or the connector is slidably installed in a fixing frame provided on the child seat, the top surface of the fixing frame has a card hole, and the connector can slide along the arrangement direction of the card hole.

[0026] The present invention provides two pairs of upper and lower limit blocks on the inner side wall of the mounting shell, and the arc-shaped rod segment of each connecting member passes through a pair of limit blocks, and the spacing between the pair of limit blocks is greater than the width of the arc-shaped rod segment, so as to provide vertical displacement space for the connecting member when it changes between the first position and the second position.

[0027] Compared with the prior art, the present invention has the following significant effects:

[0028] ⑴ The two groups of locks and connecting parts of the present invention are located in an installation shell and are connected by an unlocking operating part to form an integral component. When the connector is in use, the unlocking operating part can be operated to control the operating rod and the corresponding connecting part to unlock the lock, thereby realizing the locking and unlocking of the two locks. The present invention has a simple structure, is easy to operate, and is convenient to use.

[0029] ⑵When the connector of the present invention is in use, one of the locks is in a locked state, and the positioning state of the positioning structure on the corresponding connecting piece is released, and the positioning structure on the connecting piece corresponding to the other lock is in a positioned state. The positioning structure adopts a block with a vertical surface on the inner side and an inclined surface on the outer side, so that the child seat cannot move away from the car seat, ensuring safety during use.

[0030] ⑶ The connector of the present invention is an integral component. By operating the unlocking operating member, the positioning state of the positioning structure on the two connecting parts can be controlled to be released, so that the connector can be moved relative to the child seat to adjust the relative position of the child seat and the car seat, so that the present invention can be applied to different models of car seats, and the adjustment operation is convenient and quick.

[0031] (4) The unlocking, locking and adjusting of the relative position of the connector and the child seat of the lock of the present invention are smooth, and the overall structural stability and safety are strong, which is suitable for wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention (with a fixed frame and in a non-use state);

[0034] Figure 2 It is one of the three-dimensional structural cross-sectional views of the present invention (with a fixed frame and in a non-use state);

[0035] Figure 3 It is one of the front cross-sectional views of the present invention (with a fixed frame and in a non-use state);

[0036] Figure 4 is a top cross-sectional view of the present invention (with a fixed frame and in a non-use state);

[0037] Figure 5 This is the second cross-sectional view of the three-dimensional structure of the present invention (without the fixing frame and in a non-use state);

[0038] Figure 6 This is the second front cross-sectional view of the present invention (without the fixing frame and in a non-use state);

[0039] Figure 7 This is the third sectional view of the three-dimensional structure of the present invention (with a fixed frame and in use);

[0040] Figure 8 This is the third front cross-sectional view of the present invention (with a fixed frame and in use);

[0041] Fig. 9This is the fourth cross-sectional view of the three-dimensional structure of the present invention (with a fixed frame and in the unlocking process);

[0042] Fig.10 This is the fourth front cross-sectional view of the present invention (with a fixed frame and in the unlocking process);

[0043] Fig.11 is one of the cross-sectional views of the unlocking operating member of the present invention (in an unoperated state);

[0044] Fig.12 This is the second cross-sectional view of the unlocking operating member of the present invention (in operating state);

[0045] Fig.13 It is a schematic diagram of the exploded structure of the unlocking operating member of the present invention. DETAILED DESCRIPTION

[0046] like Figures 1 to 13 As shown, a double-headed Isofix interface connector of the present invention is used to connect a child seat to a car seat. The connector includes a mounting shell 1, a pair of locks 2, a pair of connectors 3 and an unlocking operating member 4. The mounting shell 1 is a long flat shell with crocodile mouths 11 at both ends; the pair of locks 2 are hinged at both ends of the mounting shell 1, and both have a locking position of engaging with the car seat lock rod to close the crocodile mouth 11 and an unlocking position of canceling the engagement to open the crocodile mouth 11; the pair of connectors 3 are located in the mounting shell 1 and between the pair of locks 2, and can be respectively linked with the corresponding locks 2; the unlocking operating member 4 is arranged on the mounting shell 1, and has a pair of operating rods 41 for respectively controlling the corresponding connectors 3 when unlocking.

[0047] When the lock head 2 at one end is changed from the unlocked position to the locked position, the connecting piece 3 corresponding to the lock head 2 is linked to contact the lock head 2 to lock it, and the lock head 2 at the other end is still in the unlocked position. At this time, the connector is in use; when the lock head 2 in the locked position needs to be changed to the unlocked position, the unlocking operating piece 4 is operated to make the operating rod 41 control the corresponding connecting piece 3 and the lock head 2 to link to cancel the lock, and the lock head at the other end is still in the unlocked position. At this time, the connector is in non-use.

[0048] The pair of connecting members 3 are in the first position and the second position when the corresponding lock head 2 is in the unlocked position and the locked position, respectively, and respectively abut against the first part 21 and the second part 22 of the lock head 2. The connecting member 3 and the corresponding lock head 2 are connected by a tension spring 5. When the lock head 2 changes between the unlocked position and the locked position, the connecting member 3 is pulled by the tension spring 5 to change between the first position and the second position in linkage and respectively abut against the first part 21 and the second part 22 of the lock head 2.

[0049] The lock 2 is an irregularly shaped sheet. The outer side of the lock 2 has an opening 23 for accommodating the locking rod of the car seat. The bottom of the opening 23 has a protrusion 24 for matching with the locking rod of the car seat. When the locking rod of the car seat contacts the protrusion 24 of the lock 2 at one end, because the protrusion 24 is an arc surface and acts like a cam, the lock 2 rotates around the hinge point 6 to put the lock in a locked position. The outer end of the opening 23 is a hook 25 bent inward, so that the opening is roughly 7-shaped. When the lock is closed, the hook 25 forms a closure with the crocodile mouth 11 of the mounting shell, and the locking rod of the car seat is fastened in the opening 23 of the lock. The inner bottom of the lock 2 has a concave portion and a convex portion above the concave portion. The convex portion is the first portion 21 of the lock 2, and the concave portion is the second portion 22 of the lock 2.

[0050] The pair of connectors 3 both have positioning structures 31 for limiting the relative position of the connector and the child seat. When the connector is not in use, both positioning structures are in the positioning state, that is, the child seat is not allowed to move relative to the connector; in the non-use state, the two operating rods control the corresponding connectors by operating the unlocking operating member to release the positioning state of the two positioning structures, and the position of the child seat relative to the connector can be adjusted at this time; when the connector is changed from the non-use state to the use state, that is, when the lock head at one end is changed from the unlocking position to the locking position, the positioning state of the positioning structure on the corresponding connector is released, and at the same time, the positioning structure on the connector corresponding to the lock head at the other end is still in the positioning state, that is, the child seat is not allowed to move in the direction away from the connector.

[0051] In this embodiment, the connecting member 3 is a rod, which is composed of an arc-shaped rod segment 32, a cross-bar segment 33 and a special-shaped groove 34 connected in sequence. The outer end of the arc-shaped rod segment 32 abuts against the first portion 21 and the second portion 22 of the lock head 2. Each operating rod 41 is adapted to pass through the special-shaped groove 34 of the corresponding connecting member 3. The operating rod 41 has a third position and a fourth position relative to the special-shaped groove 34. When the lock head 2 is in the unlocking position and the locking position, respectively, the operating rod 41 is in the third position and the fourth position in the special-shaped groove 34. The special-shaped groove 34 of this embodiment is an oblique groove, the bottom end of the special-shaped groove 34 is the third position, and the upper part of the special-shaped groove 34 is the fourth position. When the connecting member 3 is converted from the first position to the second position, the corresponding operating rod 41 slides from its bottom end to the upper part relative to the special-shaped groove 34.

[0052] In this embodiment, the positioning structure 31 is a block arranged on the top surface of the transverse rod section 33 of the connecting member 3, the inner side surface of the block is a vertical surface, and the outer side surface is an inclined surface. A long strip opening 12 corresponding to the block is provided on the top surface of the mounting shell 1. The positioning state of the block is that the block passes through the opening 12 and is engaged in the clamping hole provided on the car seat. The positioning state of the block is released when the block is out of the clamping hole.

[0053] See also Figure 11 to Figure 13 The unlocking operating member 4 includes a base body 42, a first button body and a second button body provided on the base body 42, the first button body and the second button body respectively having an operating rod, the first button body including a first button 43, a torsion spring 44 and a first operating rod 41a, and the second button body including a second button 45, a spring 46 and a second operating rod 41b. The first button 43 is rotatably mounted on the base body 42, and the first button 43 has a socket. The second button 45 is slidably mounted on the base body 42, and the second button 45 has a plug-in that matches the socket. One end of the torsion spring 44 is connected to the base body 42, and the other end of the torsion spring 44 is connected to the first button 43, and the torsion spring 44 is used to drive the first button 43 to reset. One end of the spring 46 is connected to the base body 42, and the other end of the spring 46 is connected to the second button 45, and the spring 46 is used to drive the second button 45 to reset. One end of the first operating rod 41a is fixedly mounted on the base body 42, and one end of the second operating rod 41b is fixedly mounted on the second button 45. Two pairs of opposite long sliding holes 13 are provided on the two side walls of the mounting shell 1. Each operating rod 41 extends into a pair of sliding holes 13 and can move along the sliding holes 13. A pair of limiting flanges 47 are provided at the extending end of the operating rod 41 and are located on both sides of the special-shaped groove 34, so that the special-shaped groove 34 is clamped between the two limiting flanges 47. When the lock head 2 is in the unlocked position and the locked position, the corresponding operating rods 41 are both at the outer end of the slide hole 13. When the lock head 2 at one end needs to be changed from the locked position to the unlocked position, the unlocking operating member is operated to control the operating rod 41 corresponding to the lock head to move from the outer end to the inner end of the slide hole 13 and drive the connecting member 3 to cancel the resistance to the lock head 2 and release the lock. At the same time, the other operating rod 41 is controlled to move from the outer end to the inner end of the slide hole 13 and move along the oblique side of the special-shaped groove 34 to press down the connecting member 3 to make the block disengage from the card hole. At this time, the position of the child seat relative to the connector can be adjusted, and after the force on the unlocking operating member is canceled, the two operating rods 41 move from the inner end to the outer end of the slide hole 13, and the connecting member 3 is pulled to the first position by the tension spring 5.

[0054] The length of the opening 12 on the mounting housing 1 satisfies the displacement stroke of the card block in the opening 12 when the lock head 2 changes from the unlocked state to the locked state. At this time, the card block moves to the outer end of the opening 12, and at the same time satisfies the displacement stroke of the card block in the opening 12 when the operating rod 41 moves from the outer end to the inner end of the sliding hole during the process of the lock head 2 changing from the locked state to the unlocked state.

[0055] Two pairs of upper and lower limit blocks 14 are provided on the inner side wall of the mounting shell 1. The arcuate rod segment 32 of each connecting member 3 passes through a pair of limit blocks 14, and the spacing between the pair of limit blocks 14 is greater than the width of the arcuate rod segment 32, so as to provide space for vertical displacement of the connecting member when it changes between the first position and the second position.

[0056] The present invention can be applied to different models of car seats by adjusting the relative position of the connector of the present invention and the child seat. In the present embodiment, the external mounting of the connector of the present invention can be fixed to a fixing frame 7 on the child seat, the left and right ends of the fixing frame 7 are open, and the top surface of the fixing frame 7 has a plurality of clamping holes 71. The connector can slide in the fixing frame 7 along the arrangement direction of the clamping holes 71 and extend from the left or right end of the fixing frame, and the connector is fixed in the fixing frame by extending the clamping block into the clamping hole.

[0057] In other embodiments, a fixing frame is not installed on the outside of the connector of the present invention, but a fixing frame is provided on the child seat. When in use, the connector of the present invention is slidably installed in the fixing frame. The top surface of the fixing frame has a plurality of card holes, and the connector can slide along the arrangement direction of the card holes.

[0058] The working principle and use process of the present invention are as follows:

[0059] 1. The connector is not in use (the locks at both ends are in the unlocked position and the two blocks are in the positioned state. At this time, the child seat is not allowed to move relative to the connector): See Figure 1 to Figure 6 When the ISOFIX connector is not connected to the locking rod of the car seat, the lock heads at both ends are in the unlocked position, and the two clamps are in the positioning state. At this time, the clamps extend into the clamp holes of the fixed frame; the two operating rods are located at the outer ends of the sliding holes, and at the same time, the two operating rods are located at the bottom of the special-shaped groove, that is, in the third position in the special-shaped groove. Since the vertical surfaces of the two clamps are against the inner walls of the corresponding clamp holes, the connector cannot move left and right in the fixed frame.

[0060] At this time, both connecting members are in the first position and abut against the first portion of the corresponding lock head, that is, abut against the convex portion of the lock head.

[0061] 2. The connector changes from an unused state to an used state (used state: the lock head at one end is in the locked position, and the positioning state of the side block is released, and the lock head at the other end is in the unlocked position, and the side block is in the positioning state. At this time, the child seat is not allowed to move away from the connector): see Figure 7 and Figure 8 When the ISOFIX connector is connected to the locking rod of the car seat, the ISOFIX connector switches from the unused state to the used state. Take the lock head on the left end and the locking rod buckle of the car seat as an example:

[0062] The locking rod presses the protrusion of the lock head to make the lock head rotate counterclockwise. Under the pull of the tension spring, the connecting piece slides into the recess. At the same time, the clamping block is pressed down by the clamping hole wall and slides out of the clamping hole. When the clamping block moves downward, the rear end of the connecting piece moves downward as a whole, and the special-shaped groove also moves downward accordingly. The operating rod slides relatively along the special-shaped groove to its upper part, and the operating rod is still at the left end of the sliding hole.

[0063] At the same time, the lock head at the right end is still in the unlocked position, the block is still inserted into the hole, and the operating rod is still located at the right end of the slide hole and at the bottom of the special-shaped groove. Since the left end of the hole abuts against the vertical surface of the block, the connector cannot move to the left in the fixed frame, that is, the child seat is not allowed to move away from the vehicle lock rod. However, since the right end of the hole abuts against the inclined surface of the block, the block can be separated from the hole, so the connector can move to the right in the fixed frame, that is, the child seat is allowed to move toward the lock rod, thus shortening the gap between the lock head and the seat surface of the car seat, that is, shortening the distance between the child seat backrest and the seat surface of the car seat.

[0064] 3. The connector changes from the used state to the unused state: see Fig. 9 and Fig.10 When the ISOFIX connector and the locking rod of the car seat need to be unlocked, the ISOFIX connector switches from the used state to the unused state. Also take the unlocking buckle of the lock head and the locking rod on the left end as an example:

[0065] When the second button is pushed inwardly, the plug-in of the second button is inserted into the plug-in, and the second operating rod and the first operating rod are driven to move relative to each other (the first operating rod moves relative to the second button along with the seat body), wherein the second operating rod moves from the right end of the sliding hole to the left end, and the movement of the second operating rod drives the connecting member to move (because the second operating rod contacts the hypotenuse of the special-shaped groove, so when the second operating rod slides horizontally to the left, the connecting member moves downward), so that the card block is separated from the card hole, and the second operating rod moves to the upper part of the special-shaped groove; at the same time, the first operating rod will also move from the left end of the sliding hole to the right end (the first operating rod is still located at the upper part of the special-shaped groove), thereby driving the connecting member to move rightward, so that the connecting member is separated from the recessed part of the lock head, and at this time, under the pulling of the tension spring, the lock head rotates clockwise, the lock head is separated from the locking rod, and the unlocking is completed; at this time, both card blocks are separated from the card hole, and the positioning state is released.

[0066] Finally, release the first button and the second button. Under the action of the spring and the torsion spring, the first button and the second button are reset, so that the first operating rod and the second operating rod return to their original positions. The two connecting parts also return to the first position under the action of the restoring force of the tension spring, and the two card blocks re-extend into the card holes. The ISOFIX connector changes from the used state to the unused state. At this time, the two card blocks are in the positioned state.

[0067] 4. Adjust the relative position of the connector and the child seat: When the connector is in use or not in use, the position of the connector in the fixed frame can be adjusted by pinching the first button and the second button on both sides at the same time.

Claims

1. A double-ended Isofix interface connector, characterized in that include: Install the housing with alligator mouths at both ends; A pair of lock heads are hinged at two ends of the mounting housing, and the pair of lock heads both have a locking position for engaging with a locking rod of the car seat to close the crocodile mouth and an unlocking position for canceling the engagement to open the crocodile mouth; A pair of connecting members are located in the mounting housing and between the pair of lock heads, and can be linked with the corresponding lock heads respectively; An unlocking operating member, which is disposed on the mounting housing and has a pair of operating rods for respectively controlling corresponding connecting members when unlocking; When the lock head at one end changes from the unlocked position to the locked position, the connecting piece corresponding to the lock head is linked to contact the lock head to lock, and the lock head at the other end is still in the unlocked position. At this time, the connector is in use; When the lock head in the locked position needs to be changed to the unlocked position, the unlocking operating member is operated to make the operating rod control the corresponding connecting member and the lock head to cancel the lock, and the lock head at the other end is still in the unlocked position. At this time, the connector is in a non-use state.

2. The double-ended Isofix interface connector according to claim 1, characterized in that: The pair of connectors both have positioning structures for limiting the relative positions of the connector and the child seat; When the connector is not in use, both positioning structures are in a positioning state; In a non-use state, the unlocking operating member is operated to allow the two operating rods to control the corresponding connecting members to release the positioning state of the two positioning structures, and the position of the child seat relative to the connector can be adjusted at this time; When the connector changes from a non-use state to a use state, that is, when the lock head at one end changes from an unlocked position to a locked position, the positioning state of the positioning structure on the corresponding connecting piece is released, and at the same time, the positioning structure on the connecting piece corresponding to the lock head at the other end remains in a positioning state.

3. The double-ended Isofix interface connector according to claim 2, characterized in that: The pair of connecting members are in the first position and the second position when the corresponding lock head is in the unlocked position and the locked position, and respectively abut against the first part and the second part of the lock head. The connecting member and the corresponding lock head are connected by a tension spring. When the lock head changes between the unlocked position and the locked position, the connecting member is pulled by the tension spring to change between the first position and the second position in linkage and respectively abut against the first part and the second part of the lock head.

4. The double-ended Isofix interface connector according to claim 3, characterized in that: The lock head is a sheet-like body, and the outer side of the lock head has an opening for accommodating the car seat lock rod, the bottom of the opening has a protrusion for cooperating with the car seat lock rod, the outer end of the opening is a hook portion bent inward, the inner bottom of the lock head has a recess and above the recess is a convex portion, the convex portion is the first part of the lock head, and the recess is the second part of the lock head.

5. The double-ended Isofix interface connector according to claim 4, characterized in that: The connecting member is a rod member, which consists of an arc-shaped rod segment, a cross rod segment and a special-shaped groove connected in sequence. The outer end of the arc-shaped rod segment abuts against the first part and the second part of the lock head. Each operating rod is adapted to pass through the special-shaped groove of the corresponding connecting member. The operating rod has a third position and a fourth position relative to the special-shaped groove. When the lock head is in the unlocking position and the locking position respectively, the operating rod is in the third position and the fourth position in the special-shaped groove.

6. The double-ended Isofix interface connector according to claim 5, characterized in that: Two pairs of upper and lower limit blocks are provided on the inner side wall of the mounting shell, and the arc-shaped rod segment of each connecting member passes through a pair of limit blocks, and the spacing between the pair of limit blocks is greater than the width of the arc-shaped rod segment, so as to provide space for vertical displacement of the connecting member when it changes between the first position and the second position.

7. The double-ended Isofix interface connector according to claim 6, characterized in that: The special-shaped groove is an inclined groove, the bottom end of the special-shaped groove is the third position, and the upper part of the special-shaped groove is the fourth position. When the connecting member changes from the first position to the second position, the corresponding operating rod slides from the bottom end to the upper part relative to the special-shaped groove.

8. The double-ended Isofix interface connector according to claim 7, characterized in that: The positioning structure is a block arranged on the top surface of the transverse rod section of the connecting piece, the inner side surface of the block is a vertical surface, and the outer side surface is an inclined surface. A long strip opening corresponding to the block is provided on the top surface of the mounting shell. The positioning state of the block is that the block passes through the opening and is engaged in the card hole provided on the car seat. The positioning state of the block is released when the block is separated from the card hole.

9. The double-ended Isofix interface connector according to claim 8, characterized in that: The unlocking operation member includes a base body, a first button body and a second button body arranged on the base body, the first button body and the second button body respectively having an operating rod, and two pairs of opposite long strip sliding holes are arranged on the two side walls of the mounting shell, each operating rod extends into a pair of sliding holes and can move along the sliding holes, when the lock head is in the unlocking position and the locking position, the corresponding operating rod is at the outer end of the sliding hole, and when the lock head at one end needs to be changed from the locking position to the unlocking position, the unlocking operation member is operated to control the operating rod corresponding to the lock head to move from the outer end of the sliding hole to the inner end, and at the same time drive the connecting member to cancel the resistance to the lock head and release the lock, and at the same time control the other operating rod to move from the outer end of the sliding hole to the inner end and move along the oblique side of the special-shaped groove to press the connecting member downward to make the card block disengage from the card hole, at this time, the position of the child seat relative to the connector can be adjusted, and after the force on the unlocking operation member is canceled, the two operating rods move from the inner end of the sliding hole to the outer end, and at the same time the connecting member is pulled to the first position by the tension spring.

10. The double-ended Isofix interface connector according to claim 9, characterized in that: A fixing frame that can be fixed on the child seat is installed on the outside of the connector, and the top surface of the fixing frame has a card hole. The connector can slide in the fixing frame along the arrangement direction of the card hole, or the connector is slidably installed in a fixing frame provided on the child seat, and the top surface of the fixing frame has a card hole, and the connector can slide along the arrangement direction of the card hole.

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