CN218463509U

CN218463509U - ISOFIX device

Info

Publication number: CN218463509U
Application number: CN202222680350.XU
Authority: CN
Inventors: 钱江
Original assignee: Shaoxing Hengjia Baby Products Co ltd
Current assignee: Shaoxing Hengjia Baby Products Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-02-10
Anticipated expiration: 2032-10-12

Abstract

The utility model provides an ISOFIX device, which comprises an inner frame, wherein two limiting baffles are arranged along the vertical direction at the side wall position of the inner frame; a telescopic piece capable of sliding in the vertical direction is arranged between the two limit baffles, a locking and unlocking piece capable of moving in the horizontal direction is installed in the inner frame, and a convex block used for driving the telescopic piece to move up and down is arranged on the side surface of the locking and unlocking piece; the utility model discloses but inner frame internally designed up-and-down motion's flexible piece replaces traditional articulated formula structure, utilizes the lug of locking deblocking piece side to realize the up-and-down motion of flexible piece, has effectively solved the locking deblocking piece and need consider when the design dodge the problem and design the bar hole and design the inclined plane and drive the complex construction of flexible piece up-and-down motion, has also strengthened the overall structure intensity of locking deblocking piece simultaneously, reduces the probability of damage.

Description

ISOFIX device

Technical Field

The utility model belongs to the technical field of car safety seat part design technique and specifically relates to an ISOFIX device is related to.

Background

At present, the society attaches more and more importance to the child safety seat, and is also popularizing and using, and the requirement to the child safety seat is higher and higher, for the travelling comfort and the security that children take, also puts forward higher requirement to our design. The child safety seat is tied to a car, is used for children to take, and has a constraint function to ensure the safety of children going out, wherein, the ISOFIX subassembly is connected with the connecting shaft of car seat, realizes the subassembly of seat installation.

Chinese patent application No. 202220943489.6 discloses an ISOFIX subassembly for installation of children's seat, including the FIX casing, the inside rib pole that is provided with of FIX casing, first spout has been seted up to one side of rib pole, the second spout has been seted up to the opposite side of rib pole, the inside interlude of first spout has first round pin axle, the inside interlude of second spout has second round pin axle, the both ends of first round pin axle and second round pin axle all are connected with the FIX casing, the one end that the rib pole is located and is close to first spout is provided with the mounting groove, the rib pole is located and has seted up the couple hole between first spout and the mounting groove, the rib pole is located the one end of being close to the second spout and has seted up the traction hole. The connecting device is used for solving the problems that the connecting process of the connecting shaft of the automobile seat is complicated, the quick installation or the disassembly of the child seat is not facilitated, and the disassembly and assembly efficiency of the child seat is influenced.

However, the above technical solution also finds the following drawbacks in the use process: (1) the rib plate structure comprises a first locking piece, a second locking piece and a rib plate, and has the problem of complex structure, specifically, because the first locking piece and the second locking piece are hinged, a long-strip-shaped hole for avoiding hinged shafts of the first locking piece and the second locking piece is required to be designed on the rib plate, and the first locking piece and the second locking piece are required to be driven to move up and down in consideration of the mode, so that the rib plate structure is complex in design, and the rib plate strength is poor due to the fact that the long-strip-shaped hole is designed in the avoiding position; (2) according to the technical scheme, the FIX shell and the outer frame are directly sleeved, no abrasion part is arranged between the FIX shell and the outer frame, and after the FIX shell and the outer frame are used for a long time, the problem that the shell or the outer frame is abraded easily is caused, so that the service life is influenced; (3) the lock catch piece is arranged in the shell in a hinged mode, but a certain gap is formed between the side face of the lock catch piece and the inner wall of the shell, so that the problems of shaking and uneven stress of the lock catch piece are easily caused when the lock catch piece is used, and the damage probability of the lock catch piece is increased; (4) when the existing unlocking is carried out, the unlocking function is realized only by pressing an unlocking button, and the problem of unlocking caused by mistaken touch of personnel is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an ISOFIX device to the structure that the current ISOFIX subassembly that proposes exists in solving above-mentioned background art is complicated, spare part structural strength is low, easy wearing and tearing, the easy mistake touches release button scheduling problem.

The technical scheme of the utility model is realized like this:

an ISOFIX device comprises an inner frame, wherein the side wall position of the inner frame is provided with two limit baffles arranged along the vertical direction; a telescopic piece capable of sliding in the vertical direction is arranged between the two limit baffles, a locking and unlocking piece capable of moving in the horizontal direction is installed in the inner frame, and a convex block used for driving the telescopic piece to move up and down is arranged on the side surface of the locking and unlocking piece;

still including being used for the drive to lock the unblock piece and carrying out the unblock subassembly that the horizontal direction removed, the unblock subassembly includes shell body and unlock button, and unlock button slidable mounting can drive when unlock button slides and lock the unblock piece and carry out the removal of horizontal direction at shell body internal position, shell body one side still is equipped with and is used for carrying out the two lock buttons that lock to unlock button.

Preferably, the two lock buttons are rotatably installed at the end part of the outer shell through a pin shaft, two lock springs are arranged between the inner side surface of the lower end of each lock button and the outer shell, outwardly extending lock rods are integrally connected to the upper ends of the two lock buttons, the two lock buttons are in a locking state, the end parts of the lock rods abut against the end parts of the inner sides of the unlock buttons, the two lock buttons are in an unlocking state, the end parts of the lock rods are changed from the end parts of the abutting unlock buttons to the end parts of the lock rods to be placed in cavities of the unlock buttons, and the unlock buttons can slide inside the outer shell at the moment.

Preferably, the unlocking button is provided with a display piece, the surface of the outer shell is provided with a display window for displaying the display piece in a locking state, and the unlocking button is connected with the locking and unlocking piece.

Preferably, the inside of inner frame still is equipped with rotatable adjustment sheet, the adjustment sheet upper end is equipped with first spacing portion, when locking the unlocking piece motion, thereby can drive the adjustment sheet and take place to rotate and make first spacing portion outwards stretch out from the last through-hole of inner frame top.

Preferably, the front end of locking and unlocking piece is equipped with a locking plate admittedly, installs the extension spring at locking and unlocking piece front end upper position, and the front end of extension spring links to each other with the rotatable latch hook of installing in the internal frame inside, the latch hook has the spacing step that cooperates and realize the locking state with the lockplate in the position department that is close to lockplate one side, the hasp groove has been seted up on the latch hook.

Preferably, two inner wall positions at the front end of the inner frame are provided with symmetrically arranged and outwards protruded bosses, and a space for limiting the rotation of the lock hook is formed between the two bosses.

Preferably, the inner frame is provided with a front guide sleeve sleeved at the front end of the inner frame and a rear guide sleeve sleeved at the rear end of the inner frame, the root positions of the two outer sides of the rear guide sleeve are provided with inward concave grooves, the grooves are provided with buckles, and the rear guide sleeve is connected with the inner frame through the buckles.

Preferably, the locking device further comprises an outer frame, wherein the inner frame is slidably mounted in the outer frame, and a plurality of upper locking holes which are arranged at equal intervals are formed in the top of the inner frame.

Preferably, the inner frame is provided with limiting bulges protruding outwards at two sides of the outer wall.

Preferably, the middle part of the telescopic piece is provided with a guide hole which is integrally in a triangular structure, three corners of the triangle are in arc transition, and the convex block for locking the unlocking piece is in a cylindrical structure and is arranged in the guide hole.

By adopting the technical scheme, the beneficial effects of the utility model are that:

(1) The utility model discloses but the interior design up-and-down motion's of inner frame flexible piece replaces traditional articulated structure, utilizes the lug of locking unlocking piece side to realize the up-and-down motion of flexible piece, has effectively solved the locking unlocking piece and need consider when designing to dodge the problem and design the bar hole and design the inclined plane and drive the complex construction of flexible piece up-and-down motion, has also strengthened the overall structure intensity of locking unlocking piece simultaneously, reduces the probability of damaging;

(2) The utility model designs the front guide sleeve and the rear guide sleeve between the inner frame and the outer frame as the abrasion part, which can avoid the abrasion problem caused by the direct contact of the inner frame and the outer frame, effectively extend the service life of the two, and reduce the cost;

(3) The utility model designs the protruding boss on the inner wall of the inner frame, which is used to limit the lock hook in the rotating process of the lock hook, avoid the problems of shaking and uneven stress of the lock hook in the rotating process, reduce the damage probability of the lock hook and prolong the service life of the lock hook;

(4) The utility model discloses an unlocking assembly is last to be provided with two lock buttons for lock or unblock unlocking button, thereby at the in-process that uses, can make unlocking button be in the state of locking, avoid because of triggering unlocking button and cause the mistake unlocking problem of ISOFIX subassembly, improve the security.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is a perspective view of the inner frame of the present invention;

FIG. 4 is an exploded view of the internal components of the inner frame of the present invention;

FIG. 5 is a perspective view of the locking and unlocking member of the present invention;

FIG. 6 is a view showing the installation structure of the locking and unlocking member and the adjusting piece of the present invention;

FIG. 7 is an internal structure view of the inner frame of the present invention;

fig. 8 is an exploded view of the unlocking assembly of the present invention;

fig. 9 is a cross-sectional view of the unlocking assembly of the present invention;

fig. 10 is a perspective view of the outer case of the present invention;

fig. 11 is a plan view of the latch hook of the present invention;

fig. 12 is a perspective view of the retractable sheet of the present invention;

FIG. 13 is a plan view of the adjustment tab of the present invention;

fig. 14 is a perspective view of the rear guide sleeve of the present invention;

fig. 15 is a cross-sectional view of the rear guide sleeve of the present invention.

Wherein:

1. an outer frame; 101. an upper locking hole; 102. a strip hole; 2. an unlocking assembly; 201. an outer housing; 202. an unlock button; 203. a shaft body; 204. a display sheet; 205. a second lock spring; 206. a second lock button; 207. a lock lever; 208. displaying a window; 3. a rear guide sleeve; 301. buckling; 4. an inner frame; 401. a boss; 402. a limit baffle; 403. a limiting bulge; 404. an upper through hole; 405. a lower through hole; 406. a strip-shaped hole; 407. grooving; 5. a front guide sleeve; 6. locking and unlocking parts; 601. a shaft hole; 602. a drawing hole; 603. a bump; 604. a pushing part; 7. a locking plate; 8. a latch hook; 801. hanging holes; 802. a limiting step; 803. a locking groove; 9. a tension spring; 10. a stretchable sheet; 1001. a spring limiting post; 1002. a guide hole; 1003. a second limiting part; 11. a regulating sheet; 1101. a first limiting part; 1102. a spring mounting position; 1103. a drive section; 12. a first spring; 13. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the figure, the ISOFIX device comprises an inner frame 4, wherein the inner frame 4 is integrally in a shell type structure and can be designed into a split type structure, and the two split type structures are assembled into the inner frame 4 through rivets.

The side wall position of the inner frame 4 is provided with two limit baffles 402 arranged along the vertical direction; a telescopic piece 10 capable of sliding in the vertical direction is arranged between the two limit baffles 402, specifically, a second limit part 1003 extending downwards is arranged in the middle position of the lower end of the telescopic piece 10, and when the telescopic piece 10 moves downwards, the position of the second limit part corresponds to that of a lower through hole 405 formed in the lower surface of the inner frame 4 and the second limit part passes through the lower through hole 405 to extend downwards; two grooves are formed above the telescopic piece 10, a spring limiting column 1001 used for placing the second spring 13 is formed between the two grooves, the second spring 13 is sleeved outside the spring limiting column 1001, the upper end of the second spring 13 abuts against the top wall of the inner frame 4, and therefore the telescopic piece 10 has a downward acting force under the action of the second spring 13.

But internal frame 4 internally mounted has locking unlocking piece 6 that the horizontal direction removed, the side of locking unlocking piece 6 is equipped with the lug 603 that is used for driving telescopic piece 10 to reciprocate, wherein, the whole guiding hole 1002 that is the triangle-shaped structure is seted up at the middle part of telescopic piece 10, the transition of triangular three corner circular arc, the lug 603 of locking unlocking piece 6 is cylindrical structure and arranges in the guiding hole 1002, so, when 6 horizontal motion of locking unlocking piece, lug 603 can be at the guiding hole 1002 internal motion, thereby drive telescopic piece 10 upward movement, make within the internal frame 4 of spacing 1003 income of second of telescopic piece 10.

Still including being used for driving locking unlocking piece 6 to carry out the unblock subassembly 2 that the horizontal direction removed, unblock subassembly 2 includes shell body 201 and unlocking button 202, and unlocking button 202 slidable mounting can drive locking unlocking piece 6 when sliding and carry out the removal of horizontal direction at shell body 201 internal position, shell body 201 one side still is equipped with the two pass lock button 206 that is used for locking unlocking button 202, specifically, shell body 201 passes through bolt fixed connection in the internal frame 4 outside, and the unlocking button 202 that slides the setting can drive the inside locking unlocking piece 6 of internal frame 4 and carry out the horizontal movement to realize the purpose of unblock or locking.

Specifically, the secondary lock button 206 is rotatably mounted at an end position of the outer shell 201 through a pin shaft, a secondary lock spring 205 is arranged between an inner side surface of a lower end of the secondary lock button 206 and the outer shell 201, an outward-extending lock rod 207 is integrally connected to an upper end of the secondary lock button 206, specifically, the lock rod extends into the outer shell 201, when the secondary lock button 206 is in a locked state, an end of the lock rod 207 abuts against an end position of an inner side of the unlock button 202, when the secondary lock button 206 is in an unlocked state, an end of the lock rod 207 is changed from abutting against an end of the unlock button 202 to being placed in a cavity of the unlock button 202, and at this time, the unlock button 202 can slide inside the outer shell 201; when the unlocking device is used, the secondary lock spring 205 can be compressed by pressing the lower part of the secondary lock button 206, so that the secondary lock button 206 rotates around a hinge shaft of the secondary lock button, after the secondary lock button is rotated, the tail end of the lock rod 207 is lifted upwards, the unlocking button 202 which is originally in a locking state is changed into an unlocking state, at the moment, the unlocking button 202 can be pressed, the unlocking button 202 moves towards the direction of the secondary lock button 206, and in the process, the lock rod 207 is arranged in a cavity inside the unlocking button 202; on the contrary, the lock lever 207 is in a certain inclined state under the action of the secondary lock spring 205, and thus abuts against the step position at the end of the unlock button 202, and the lock of the unlock button 202 is realized.

Specifically, the display piece 204 is installed on the unlocking button 202, the display piece 204 is green, and is clamped on the outer surface of the unlocking button 202 and moves synchronously with the movement of the unlocking button 202, and the display window 208 for displaying the display piece 204 in a locked state is opened on the surface of the outer shell 201, that is, in the locked state, the display piece 204 is just located at the display window 208, the green display piece 204 can be seen from the display window 208 when looking inwards, and the unlocking button 202 is connected with the locking and unlocking piece 6, wherein the unlocking button 202 is integrally connected with the shaft body 203 extending outwards, the shaft body 203 is installed in the shaft hole 601 formed at the front end of the locking and unlocking piece 6 in a matching manner, and the shaft body 203 extends into the strip-shaped hole 406 formed at the tail end of the inner frame 4, so that the unlocking button 202 can move relative to the inner frame 4, thereby realizing the installation of the unlocking button 202 and the locking and unlocking piece 6, and when the unlocking button 202 moves, the locking and unlocking piece 6 can be driven to slide inside the inner frame 4.

Specifically, the inside of the inner frame 4 is further provided with a rotatable adjusting sheet 11, the upper end of the adjusting sheet 11 is provided with a first limiting portion 1101, when the locking and unlocking member 6 moves, the adjusting sheet 11 can be driven to rotate, so that the first limiting portion 1101 extends outwards from the upper through hole 404 above the inner frame 4, more specifically, the adjusting sheet 11 is mounted at an internal position of the inner frame 4 through a pin, the central axis of the rotating shaft of the adjusting sheet is parallel to the rotating axis of the locking hook 8, a spring mounting position 1102 is provided above the adjusting sheet 11, the position of the spring mounting position 1102 and the first limiting portion 1101 are respectively arranged at two sides of the rotating shaft of the adjusting sheet 11, a first spring 12 is mounted on the spring mounting position 1102, the upper end of the first spring 12 abuts against the top wall of the inner frame 4, a downward acting force can be applied to the adjusting sheet 11, and the first limiting portion 1101 is always located at an upper limit position under the action of no external force; in addition, the side surface of the lower end of the adjusting blade 11 is provided with a driving portion 1103, and the middle of the locking and unlocking member 6 is provided with a pushing portion 604 which is matched with the driving portion 1103 in the horizontal direction, so that when the locking and unlocking member 6 moves, the pushing portion 604 contacts with the driving portion 1103 and drives the adjusting blade 11 to rotate.

Specifically, the front end of locking deblocking piece 6 is equipped with a locking plate 7 admittedly, installs extension spring 9 at locking deblocking piece 6 front end upper position, and the front end of extension spring 9 links to each other with the rotatable latch hook 8 of installing in the inside internal frame 4, and wherein, in the hanging hole 801 of extension spring 9 front end colludes and locates above latch hook 8, the rear end colludes and establishes the traction hole 602 department at locking deblocking piece 6 front end, latch hook 8 has the spacing step 802 who cooperates and realize the locking state with latch plate 7 in the position department that is close to latch plate 7 one side, latch hook 803 has been seted up on the latch hook 8, so set up, is in order to realize the locking state, and more specifically, when the upper surface of latch plate 7 contacted with the lower surface of spacing step 802, latch hook 8 is in the fixed state, can not take place to rotate, and at this moment, in latch groove 803 is arranged in to car seat's connecting axle, spacing effect can be realized to the connecting axle to the fluting 407 that the cooperation internal frame 4 front end was seted up, reaches the purpose of locking.

Specifically, two inner wall positions of the front end of inner frame 4 have symmetry setting and outside convex boss 401, form the space that is used for playing spacing effect when rotating latch hook 8 between two bosses 401, so set up, because latch hook 8 is after the installation is accomplished, both sides face can and inner frame 4 between form certain clearance, when using, can be because the atress is too big and the atress is uneven and cause the problem of rocking of latch hook 8, influence the life of latch hook 8, consequently, inner frame 4 inner wall sets up boss 401, can play certain spacing effect to latch hook 8, avoid producing and rock the problem.

Specifically, the rear guide sleeve 3 is sleeved on the front end of the inner frame 4, the rear guide sleeve 3 is sleeved on the rear end of the inner frame 4, the front guide sleeve 5 and the rear guide sleeve 3 are used as abrasion parts to replace a mode that the inner frame 4 is in direct contact with the outer frame 1, so that the service life of the inner frame 4 and the outer frame 1 is prolonged, the root positions of two outer sides of the rear guide sleeve 3 are provided with grooves which are inwards concave, the grooves are provided with buckles 301, the rear guide sleeve 3 is connected with the inner frame 4 through the buckles 301, the inner frame 4 is installed with the rear guide sleeve 3 after being installed, the inner wall of the conventional rear guide sleeve 3 is provided with a protruding clamping block for assembling with the inner frame 4, however, after the inner frame 4 is placed inside the outer frame 1, due to space limitation, the inner guide sleeve cannot elastically deform inside the outer frame 1, so that the rear guide sleeve 3 is assembled on the inner frame 4, the grooves are designed for the rear guide sleeve 3, and the structures of the buckles 301 are further arranged in the grooves, so that the rear guide sleeve 3 can be assembled under the condition that the inner frame 1 inside the outer frame 1, and convenience in assembly is improved.

Specifically, still include outer frame 1, inner frame 4 slidable mounting is in outer frame 1 internal position, and sets up a plurality of upper locking holes 101 that set up at the interval equally at the top of inner frame 4, and the locking hole is used for cooperateing with first spacing portion 1101 of adjustment sheet 11, plays the relative spacing effect of inner frame 4 and outer frame 1.

Specifically, the outer wall of the inner frame 4 has limiting protrusions 403 protruding outwards at two side positions, and the arrangement is such that the length of the inner frame 4 protruding from the inside of the outer frame 1 is limited by the limiting protrusions 403, more specifically, the elongated holes 102 are opened at two sides of the outer frame 1, the limiting protrusions 403 are slidably arranged in the elongated holes 102, and when the inner frame 4 moves to the limiting position, the limiting protrusions 403 abut against the ends of the elongated holes 102 to realize limiting.

The working principle is as follows: when the automobile seat locking device is used, the second lock button 206 is pressed firstly, the unlocking button 202 is in an unlocking state, then the unlocking button 202 is pressed, the unlocking button 202 drives the locking and unlocking piece 6 inside the inner frame 4 to move horizontally, the locking and unlocking piece 6 is in contact with the driving portion 1103 of the adjusting piece 11, the adjusting piece 11 rotates, the first limiting portion 1101 in the upper locking hole 101 of the outer frame 1 is retracted into the inner frame 4, at the moment, the inner frame 4 can be pushed to move towards the outside of the outer frame 1, when the automobile seat locking device moves to the tail end position, the connecting shaft of the automobile seat is connected through the locking hook 8, the upper surface of the locking plate 7 is arranged below the limiting step 802 of the locking hook 8, the two are in contact, and locking is achieved; during unlocking, the unlocking button 202 is pressed, the locking and unlocking piece 6 moves, and the tension spring 9 is utilized to drive the locking hook 8 to rotate, so that the connecting shaft is conveniently separated from the locking groove 803, and unlocking is completed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ISOFIX apparatus, characterized in that, comprises an inner frame (4), the side wall position of the inner frame (4) has two limit baffles (402) arranged along the vertical direction; a telescopic sheet (10) capable of sliding in the vertical direction is arranged between the two limit baffles (402), a locking and unlocking piece (6) capable of moving in the horizontal direction is installed inside the inner frame (4), and a convex block (603) used for driving the telescopic sheet (10) to move up and down is arranged on the side surface of the locking and unlocking piece (6);

still including being used for driving locking unblock piece (6) to carry out unblock subassembly (2) that the horizontal direction removed, unblock subassembly (2) are including shell body (201) and unblock button (202), and unblock button (202) slidable mounting can drive locking unblock piece (6) when sliding and carry out the removal of horizontal direction at shell body (201) internal position, shell body (201) one side still is equipped with and is used for carrying out two lock button (206) that lock to unblock button (202).

2. An ISOFIX apparatus according to claim 1, wherein: two lock button (206) are through the rotatable installation in shell body (201) end position of round pin axle, be provided with two lock spring (205) between the lower extreme medial surface of two lock button (206) and shell body (201), the upper end an organic whole of two lock button (206) is connected with outside extension locking lever (207), is in under locking state at two lock button (206), and the tip butt of locking lever (207) is in the medial extremity position of unblock button (202), and under two lock button (206) are in unblock state, locking lever (207) tip becomes to arrange in the cavity of unblock button (202) from butt unblock button (202) tip, and unblock button (202) can slide in shell body (201) inside this moment.

3. An ISOFIX apparatus according to claim 1, wherein: the unlocking button (202) is provided with a display piece (204), the surface of the outer shell (201) is provided with a display window (208) for displaying the display piece (204) in a locking state, and the unlocking button (202) is connected with the locking unlocking piece (6).

4. An ISOFIX apparatus according to claim 1, wherein: the inner frame (4) is further internally provided with a rotatable adjusting sheet (11), the upper end of the adjusting sheet (11) is provided with a first limiting part (1101), and when the locking and unlocking piece (6) moves, the adjusting sheet (11) can be driven to rotate, so that the first limiting part (1101) extends out of an upper through hole (404) above the inner frame (4).

5. An ISOFIX apparatus according to claim 1, wherein: the front end of locking unblock piece (6) is equipped with a locking plate (7) admittedly, installs extension spring (9) in locking unblock piece (6) front end upper position, and the front end of extension spring (9) links to each other with rotatable latch hook (8) of installing in internal frame (4) inside, latch hook (8) have with the cooperation of lockplate (7) and realize locking state spacing step (802) in the position department that is close to lockplate (7) one side, latch hook (8) are last to have seted up hasp groove (803).

6. An ISOFIX apparatus according to claim 5, wherein: two inner wall positions at the front end of the inner frame (4) are provided with symmetrically arranged and outwards protruded bosses (401), and a space for limiting the rotation of the latch hook (8) is formed between the two bosses (401).

7. An ISOFIX apparatus according to claim 1, wherein: the inner frame structure is characterized by further comprising a front guide sleeve (5) sleeved at the front end of the inner frame (4) and a rear guide sleeve (3) sleeved at the rear end of the inner frame (4), wherein the root positions of two outer sides of the rear guide sleeve (3) are provided with inwards concave grooves, the grooves are provided with buckles (301), and the rear guide sleeve (3) is connected with the inner frame (4) through the buckles (301).

8. An ISOFIX apparatus according to claim 1, wherein: still include outer frame (1), inner frame (4) slidable mounting is in outer frame (1) internal position, and has seted up a plurality of last locking holes (101) that set up at equal intervals at the top of inner frame (4).

9. An ISOFIX apparatus according to claim 1, wherein: and limiting bulges (403) protruding outwards are arranged at two sides of the outer wall of the inner frame (4).

10. An ISOFIX apparatus according to claim 1, wherein: the middle part of the telescopic piece (10) is provided with a guide hole (1002) which is integrally in a triangular structure, three corners of the triangle are in arc transition, and a convex block (603) of the locking unlocking piece (6) is in a cylindrical structure and is arranged in the guide hole (1002).