A safety seat

Abstract

The present application discloses a safety seat, which belongs to the technical field of safety seats. The safety seat includes a first ISOFIX telescopic mechanism and a second ISOFIX telescopic mechanism that are independently arranged. The first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism are symmetrically arranged and suitable for connection with a car seat. One of the first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism can automatically retract, and the other is provided with a locking device to prevent retraction, so that the safety seat can rotate left or right. When a child passenger is thrown backward, the safety seat rotated left or right can guide the child's head to rotate by making oblique contact with the child's head. When a child is thrown backward in an existing safety seat, the child's head is directly against the seat back, which is prone to collision injury. However, the present application absorbs energy through the rotation of the child's head, avoiding excessive acceleration of the child's head and playing an effective protective role.

Description

Technical Field

[0001] The present application relates to the field of child safety seats, and in particular to a child safety seat. Background Art

[0002] A child safety seat is a device that accommodates a child either sitting or lying. Its design is intended to reduce the risk of injury by restricting the child's body movement in the event of a vehicle collision or sudden speed change. To address the issue of excessive head acceleration, most child safety seats use a slow-rebound material inside the headrest, which increases costs or increases the thickness of the energy-absorbing material. However, this increased thickness can cause the child's neck to hunch, reducing ride comfort. Summary of the Invention

[0003] One purpose of the present application is to provide a safety seat that solves the problem of excessive acceleration of a child's head, reduces the impact force between the child's head and the safety seat, and protects the child's head.

[0004] To achieve the above objectives, the technical solution adopted in the present application is: a safety seat, comprising a first ISOFIX telescopic mechanism and a second ISOFIX telescopic mechanism independently arranged from each other, the first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism being symmetrically arranged and suitable for connection to a car seat, one of the first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism being capable of automatic retraction, and the other being provided with a locking device to prevent retraction, so that the safety seat can be rotated left or right.

[0005] Preferably, the safety seat includes a seat body, and the first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism are respectively arranged on the left and right sides of the bottom of the seat body, wherein the first ISOFIX telescopic mechanism includes a first sleeve and a first shell, the first shell is slidably arranged in the first sleeve, the first sleeve is arranged on one side of the bottom of the seat body, and the first shell is suitable for connecting to the anchor rod of the car seat, and the second ISOFIX telescopic mechanism includes a second sleeve and a second shell, the second shell is slidably arranged in the second sleeve, the second sleeve is arranged on the other side of the bottom of the seat body, and the second shell is suitable for connecting to the anchor rod on the other side of the car seat.

[0006] Preferably, a base is provided at the bottom of the seat body, and the base includes an upper base shell and a lower base shell. The upper base shell and the lower base shell are connected up and down to form an installation cavity. The installation cavity is annular. The first sleeve is connected to the lower base shell through a first connecting member, and the second sleeve is connected to the lower base shell through a second connecting member. The first sleeve and the second sleeve are both arranged in the installation cavity.

[0007] Preferably, the first connecting member is an L-shaped connecting member, and the L-shaped connecting member includes a first plate and a second plate arranged perpendicular to each other, the first plate is connected to the side wall of the first sleeve, and the second plate is connected to the lower shell of the base, the lower shell of the base is provided with a mounting column, and the second plate is provided with a corresponding mounting hole, along the length direction of the first sleeve, the mounting columns are set to two, the mounting holes are set to two, and the second connecting member is also an L-shaped connecting member.

[0008] Preferably, the safety seat is further provided with a supporting curved surface suitable for supporting the head of a child passenger, the safety seat comprises a C-shaped headrest, and the supporting curved surface is the inner side surface of the headrest.

[0009] Preferably, a first gear member, a first latch, a first connecting locking block and an elastic reset mechanism are provided in the first shell. The first gear member is rotatably connected to the first shell through a front axle pin, and the first latch is rotatably connected to the first shell through a rear axle pin. The first latch is suitable for engaging the automobile anchor rod. A plurality of first gear holes arranged at intervals are provided on the first sleeve. The first gear member is suitable for being inserted into the first gear hole to lock the first sleeve. The elastic reset mechanism is suitable for applying opposite forces to the first connecting locking block and the first latch, and the end of the first connecting locking block just contacts the first latch, so that the first latch is locked in the current position.

[0010] Preferably, the second ISOFIX telescopic mechanism includes a second sleeve, a second shell slidably arranged in the second sleeve, and a second gear member rotatably arranged in the second shell, the locking device is set as a locking member, the second sleeve is provided with a plurality of second gear holes, the second gear member is provided with a locking protrusion suitable for inserting into the second gear hole, so as to prevent the second shell from extending relative to the second sleeve, the locking member is movably provided on one of the second sleeve and the second shell, and the other is provided with a plurality of locking holes, the locking member is provided with an insertion portion suitable for inserting into the locking hole, so as to prevent the second shell from retracting relative to the second sleeve.

[0011] Preferably, the locking member is slidably arranged above the second sleeve, the multiple lock holes are arranged on the second shell, the insertion portion includes a locking surface and a guide surface, the second shell is suitable for driving the locking member to leave the lock hole by abutting against the guide surface, the second shell is suitable for limiting by abutting against the locking surface, the locking surface is arranged back to the second gear member, the locking surface is a plane basically perpendicular to the lock hole, and the guide surface is an inclined surface arranged toward the second gear member.

[0012] Preferably, the second ISOFIX telescopic mechanism includes a second sleeve, a second shell slidably arranged in the second sleeve, and a second gear member rotatably arranged in the second shell, the second gear member is suitable for rotating from a locked position to an unlocked position to unlock the second sleeve, the locking device is configured as a latch and an elastic member, the latch is arranged relative to the second gear member, the elastic member is suitable for keeping the latch in an initial position, when the second shell has an acceleration to retract into the second sleeve, the latch overcomes the reset force of the elastic member due to its own inertia and moves from the initial position to the rotation path of the second gear member to prevent the second gear member from rotating to unlock the second sleeve.

[0013] Preferably, the locking device also includes a mounting seat, which is connected to the second shell and arranged relative to the second gear member. The pin is slidably arranged on the mounting seat, and the elastic member applies a reset force to the pin away from the second gear member. The mounting seat is provided with a limiting portion, and the limiting portion is suitable for contacting the pin to cooperate with the elastic member to keep the pin in the initial position.

[0014] Preferably, the elastic member is arranged along the height direction of the second shell, one end of the elastic member is connected to the second shell, and the pin is arranged on the other end. The elastic member continuously applies a reset force to the pin to keep the pin in the initial position. When the second shell has an acceleration to retract into the second sleeve, one end of the elastic member is driven by the second shell, and the other end is offset by the inertia of the pin, so that the pin swings to the rotation path of the second gear member, thereby preventing the second gear member from rotating and unlocking. The pin is arranged at the top of the elastic member.

[0015] Compared with the existing technology, the beneficial effect of the present application is that when a child passenger is swung backward, the safety seat, after rotating to the left or right, can guide the child's head to rotate diagonally. In existing safety seats, when a child is swung backward, the child's head is facing the seat back, which can easily cause impact injuries. However, the present application absorbs energy through the rotation of the child's head, thereby avoiding excessive acceleration of the child's head and playing an effective protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the safety seat when it is installed on the car seat;

[0017] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0018] Figure 3 is a schematic diagram of the initial state of the safety seat;

[0019] Figure 4 is a schematic diagram of the partial structure of the safety seat in its initial state;

[0020] Figure 5 Schematic diagram of a child moving forward;

[0021] Figure 6 A diagram of a child's backward swing;

[0022] Figure 7 A diagram of a child's head rotation;

[0023] Figure 8 This is a schematic diagram of the partial structure of the safety seat when tilted left or right;

[0024] Figure 9 This is a schematic diagram of the partial structure of another safety seat when tilted left or right;

[0025] Figure 10 is a cross-sectional schematic diagram of the first ISOFIX telescopic mechanism;

[0026] Figure 11 is a cross-sectional schematic diagram of the first ISOFIX telescopic mechanism when it is retracted;

[0027] Figure 12 Schematic cross-section of the first type of second ISOFIX telescopic mechanism;

[0028] Figure 13 This is a schematic diagram of the first type of second ISOFIX telescopic mechanism when extended;

[0029] Figure 14 Schematic diagram of the first type of second ISOFIX telescopic mechanism when it is retracted;

[0030] Figure 15 Schematic diagram of the partial structure of the first and second ISOFIX telescopic mechanisms;

[0031] Figure 16 is a cross-sectional schematic diagram of a second type of second ISOFIX telescopic mechanism;

[0032] Figure 17 Schematic diagram of the second ISOFIX telescopic mechanism when it is retracted;

[0033] Figure 18 Schematic diagram of the second type of anti-retraction of the second ISOFIX telescopic mechanism;

[0034] Figure 19 Schematic diagram of the partial structure of the second ISOFIX telescopic mechanism;

[0035] Figure 20 Schematic cross-section of the third type of second ISOFIX telescopic mechanism;

[0036] Figure 21 Schematic diagram of the third type of anti-retraction of the second ISOFIX telescopic mechanism;

[0037] In the figure: 10, car seat; 20, safety seat; 30, child; 21, base lower shell; 211, mounting post; 22, base upper shell; 23, seat body; 24, headrest; 40, second ISOFIX retractable mechanism; 50, first ISOFIX retractable mechanism; 61, first connector; 611, first plate; 612, second plate; 612a, mounting hole; 62, second connector;

[0038] 51. First sleeve; 51a. First gear hole; 52. First housing; 53. First gear member; 54. Front axle pin; 55. First connecting lock block; 56. Elastic reset mechanism; 57. First latching tooth; 58. Rear axle pin;

[0039] 41. Second sleeve; 41a. Second shift hole; 42. Second housing; 42a. Lock hole; 43. Second shift member; 431. Locking protrusion; 45. Second connecting lock block; 90. Locking member; 91. Insertion portion; 911. Locking surface; 912. Guide surface; 92. Connecting portion;

[0040] 60. Mounting seat; 61. Position limiting portion; 70. Elastic member; 80. Latch; 432. Raised portion; 601. Bottom surface; 602. First side surface; 6021. First raised portion; 603. Second side surface; 6031. Second raised portion; 81. First end portion; 82. Intermediate connecting section; 821. Contact protrusion; 83. Second end portion;

[0041] 4321, recessed portion; 4322, interfering plane; 4323, interfering curved surface; 831, first protrusion; 832, rod-shaped portion; 833, second protrusion. DETAILED DESCRIPTION

[0042] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0043] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0044] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0045] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0046] Example 1: This application provides a safety seat, such as Figures 1 to 8 As shown, it includes a first ISOFIX retractable mechanism 50 and a second ISOFIX retractable mechanism 40 that are independently arranged. The first ISOFIX retractable mechanism 50 and the second ISOFIX retractable mechanism 40 are symmetrically arranged and are suitable for connecting to the car seat 10. One of them can automatically retract, and the other is provided with a locking device to prevent retraction, so that the safety seat 20 can be rotated left or right.

[0047] Figure 3 The figure shows the initial state of the child safety seat 20 30 , where the child passenger 30 is fixed in the child safety seat 20 30 by the seat belt. At this time, the first ISOFIX telescopic mechanism 50 and the second ISOFIX telescopic mechanism 40 are extended to the same length, as shown in FIG. Figure 4 shown.

[0048] When the vehicle suddenly decelerates, the child 30 and the safety seat 20 tend to continue moving forward at the original speed due to their own inertia, and the car seat 10 decelerates synchronously with the vehicle deceleration. At this time, the child 30 is able to move forward with the safety belt under the action of its own inertia. Figure 5As shown in the figure, V1 indicates the movement direction of the child 30. At this time, the car seat 10 applies an instantaneous pulling force in a backward direction to the safety seat 20 through the first ISOFIX telescopic mechanism 50 and the second ISOFIX telescopic mechanism 40, so that the child safety seat 20 and the car seat 10 remain relatively stationary.

[0049] When the child 30 moves forward a certain distance, the safety belt exerts a pulling force on the child to prevent the child from moving forward further. After that, the car seat 10 is compressed and reset, and the child safety seat 20 30 and the child occupant 30 are respectively returned to their original positions and swung back. Since one of the first ISOFIX telescopic mechanism 50 and the second ISOFIX telescopic mechanism 40 can automatically retract, the other is provided with a locking device to prevent retraction, that is, the ISOFIX assembly system will retract unilaterally, so that the extension lengths of the ISOFIX telescopic mechanisms on the left and right sides are inconsistent. The retracted side moves closer to the backrest of the car seat 10, so that the child safety seat 20 30 rotates horizontally as a whole, tilting to the left or right relative to the car seat 10, and the child is swung back to its original position. Figure 6 As shown in the figure, V2 indicates the movement direction of the child 30. Since the safety seat 20 has rotated horizontally, the child's head is not facing the head support surface in the center of the safety seat when returning to its original position. Instead, it will fall on the left or right side of the support surface instead of the center. Due to the existence of V2, there is relative movement between the head and the support surface. The support surface generates a support force F perpendicular to the support surface on one side of the child's head 30. N , and the vertical support force F N The friction force f causes the child's head to rotate, as shown in FIG. Figure 7 As shown, the support curved surface can guide the child's 30 head to rotate and thus absorb the energy of the head impact. After dynamic testing, it has been verified that the safety seat 20 can greatly improve the impact damage to the child's 30 head when it is thrown backward. The existing safety seat 20 is not provided with a locking device to prevent retraction. The child's 30 seat will not rotate to the left or right. When the child 30 is thrown backward, it falls back against the support curved surface and is subjected to excessive impact force and acceleration.

[0050] More detailed, such as Figure 1 、 Figure 2 As shown, the safety seat 20 includes a seat body 23, a first ISOFIX telescopic mechanism 50, and a second ISOFIX telescopic mechanism 40 are respectively installed on the left and right sides of the bottom of the seat body 23, and the child passenger 30 sits in the seat body 23. When installing the safety seat 20 on the car seat 10, the length of the two ISOFIX telescopic mechanisms is first extended, and they are respectively aligned with the two anchor points on the car seat 10 for engagement, and then the ISOFIX telescopic mechanisms are adjusted to the appropriate length, and then an anti-rollover device such as a support leg or a TT belt is installed to complete the installation.

[0051] Further, combined Figure 4 As shown, the first ISOFIX telescopic mechanism 50 includes a first sleeve 51 and a first shell 52. The first shell 52 is slidably arranged in the first sleeve 51. The first sleeve 51 is arranged on one side of the bottom of the seat body 23. The first shell 52 is suitable for connecting with the anchor rod of the car seat 10. Similarly, the second ISOFIX telescopic mechanism 40 includes a second sleeve 41 and a second shell 42. The second shell 42 is slidably arranged in the second sleeve 41. The second sleeve 41 is arranged on the other side of the bottom of the seat body 23. The second shell 42 is suitable for connecting with the anchor rod on the other side of the car seat 10. The left and right ISOFIX telescopic mechanisms are independent of each other. When the lengths of the two are different, they will be as follows Figure 8 As shown, the base is driven to rotate leftward or rightward, thereby driving the seat body 23 and the headrest 24 on the seat body 23 to rotate leftward or rightward together.

[0052] A base is provided at the bottom of the seat body 23, and the base is suitable for being placed on the seat surface of the car seat 10. The base includes an upper base shell 22 and a lower base shell 21. The upper base shell 22 and the lower base shell 21 are connected up and down to form an installation cavity. Since the ISOFIX telescopic mechanisms on the left and right sides are independent of each other, there is no need to set a cross bar between the first shell 52 and the second shell 42 for synchronization, which simplifies the structure that needs to be assembled in the base. The installation cavity is annular, and the first sleeve 51 and the second sleeve 41 can be installed on both sides of the installation cavity respectively, and the annular structure has good force stability. The first sleeve 51 is connected to the lower base shell 21 through the first connecting member 61, and the second sleeve 41 is connected to the lower base shell 21 through the second connecting member 62. The first sleeve 51 and the second sleeve 41 are both arranged in the installation cavity to be shielded and protected by the base.

[0053] Furthermore, the first connector 61 is an L-shaped connector, comprising a first plate 611 and a second plate 612 arranged perpendicularly to each other. The first plate 611 is connected to the side wall of the first sleeve 51, and the second plate 612 is connected to the base lower shell 21. Furthermore, the base lower shell 21 is provided with a mounting post 211, and the second plate 612 is provided with a mounting hole 612a. The first sleeve 51 and the base lower shell 21 are fixedly connected by inserting the mounting post 211 through the mounting hole 612a. This connection method is simple and easy to operate. Two mounting posts 211 are provided along the length of the first sleeve 51, and correspondingly, two mounting holes 612a are provided to prevent the base lower shell 21 from tilting left and right. The second connector 62 is also an L-shaped connector.

[0054] It is understandable that, except for the locking device, the other structures of the first ISOFIX telescopic mechanism 50 can be the same as those of the second ISOFIX telescopic mechanism 40 so that they can be manufactured using the same set of molds and the assembly difficulty of the ISOFIX telescopic mechanism can be reduced.

[0055] It can be understood that the safety seat 20 must be provided with a supporting curved surface suitable for supporting the head of a child passenger. In this embodiment, the safety seat 20 also includes a C-shaped headrest 24, and the supporting curved surface is the inner side of the headrest 24. It can be understood that the headrest 24 has a larger curvature than the seat body 23. By using the inner side of the headrest 24 as the supporting curved surface, the guidance of the head rotation is visible to the naked eye, and the collision energy absorption effect is obvious. Furthermore, the headrest 24 can use energy-absorbing materials to improve the cushioning energy absorption effect. The headrest 24 is detachable relative to the seat body 23 and the height is adjustable to facilitate cleaning and maintenance, and to make the headrest 24 suitable for children 30 of different ages.

[0056] In this embodiment, the second ISOFIX telescopic mechanism 40 on the right hand side of the child 30 is provided with a locking device, and the first ISOFIX telescopic mechanism 50 on the left hand side of the child 30 can automatically retract. In other embodiments, it can also be as follows Figure 9 As shown, the ISOFIX telescopic mechanism on the right hand side of the child 30 can be automatically retracted, and the ISOFIX telescopic mechanism on the left hand side of the child 30 is provided with a locking device.

[0057] Example 2: Based on Example 1, this example further refines the structure of the first ISOFIX telescopic mechanism 50, such as Figure 10 、 Figure 11 As shown, a first gear member 53, a first latch 57, a first connecting lock block 55 and an elastic reset mechanism 56 are provided in the first housing 52. The first gear member 53 is rotatably connected to the first housing 52 through a front axle pin 54. The first latch 57 is rotatably connected to the first housing 52 through a rear axle pin 58. The first latch 57 is suitable for engaging the car anchor rod. A plurality of first gear holes 51a arranged at intervals are provided on the first sleeve 51. The first gear member 53 is suitable for inserting into the first gear hole 51a to lock the first sleeve 51. When the car is traveling at a constant speed, the first ISOFIX telescopic mechanism 50 is in Figure 10In the state shown, the elastic reset mechanism 56 is suitable for applying opposite forces to the first connecting lock block 55 and the first latch tooth 57, and the end of the first connecting lock block 55 just contacts the first latch tooth 57, so that the first latch tooth 57 is locked in the current position. When the safety seat 20 is thrown backward relative to the car seat 10, that is, the first shell 52 has a relative forward acceleration relative to the first sleeve 51, the anchor rod on the car applies a force to the first latch tooth 57 to move to the left. Since the latch tooth is rotationally connected to the first shell 52 through the rear axle pin 58 and the first latch tooth 57 is locked by the first connecting lock block 55, the first latch tooth 57 cannot When the safety seat 20 is rotated, the force from the anchor rod can only be transmitted to the first shell 52 through the rear axle pin 58, causing the first shell 52 to move to the left. The first shell 52 drives the first gear member 53 to move to the left as a whole through the front axle pin 54. At this time, the first sleeve 51 moves to the right as a whole along with the safety seat 20. The top of the first gear member 53 has a tendency to move to the right relative to the front axle pin 54 under the drive of the first sleeve 51 corresponding to the edge of the first gear hole 51a, thereby causing the first gear member 53 to rotate. During this process, the first connecting lock block 55 does not interfere with the first gear member 53, and the top of the first gear member 53 can be rotated. Figure 11 As shown, the first housing 52 successfully leaves the first gear hole 51a and automatically retracts relative to the first sleeve 51. It can be understood that due to the existence of the first gear member 53, the first ISOFIX telescopic mechanism 50 cannot automatically extend. Only after manually unlocking the first gear member 53 can the first housing 52 be freely extended relative to the first sleeve 51.

[0058] Embodiment 3: Based on the above embodiment, this embodiment provides a structure of a second ISOFIX telescopic mechanism 40, such as Figure 12-15 As shown, the second ISOFIX telescopic mechanism 40 includes a second sleeve 41, a second shell 42 slidably arranged in the second sleeve 41, and a second gear member 43 rotatably arranged in the second shell 42. The locking device is set as a locking member 90. The second sleeve 41 is provided with a plurality of second gear holes 41a. The second gear member 43 is provided with a locking protrusion 431 suitable for inserting into the second gear hole 41a to prevent the second shell 42 from extending relative to the second sleeve 41. The locking member 90 is movably provided on one of the second sleeve 41 and the second shell 42, and the other is provided with a plurality of locking holes 42a. The locking member 90 is provided with an insertion portion 91 suitable for inserting into the locking hole 42a to prevent the second shell 42 from retracting relative to the second sleeve 41.

[0059] Furthermore, the locking member 90 is slidably disposed on the second sleeve 41 or the second housing 42. The locking member 90 is inserted into or withdrawn from the lock hole 42a in a sliding connection manner. The connection structure of the locking member 90 is simple and easy to assemble.

[0060] More specifically, the locking member 90 is slidably arranged above the second sleeve 41, and multiple lock holes 42a are arranged on the second shell 42. The locking member 90 does not occupy the installation space inside the second shell 42, thereby preventing the locking member 90 from interfering with the components inside the second shell 42.

[0061] Figure 12 The middle insertion portion 91 is inserted into the locking hole 42a, while the locking protrusion 431 is inserted into the second shift hole 41a. The one-way locking of the locking member 90 prevents the second housing 42 from retracting relative to the second sleeve 41, while the one-way locking of the second shift member 43 prevents the second housing 42 from extending relative to the second sleeve 41, thereby fixing the position of the second housing 42 relative to the second sleeve 41. It is understood that the provision of the second shift member 43 does not prevent retraction. When only the locking protrusion 431 is inserted into the second shift hole 41a and the insertion portion 91 is not inserted into the locking hole 42a, the second housing 42 can freely retract into the second sleeve 41. The automatic retraction process is the same as that of the first ISOFIX telescopic mechanism 50. Therefore, it is said that the one-way locking of the second shift member 43 prevents the second housing 42 from extending relative to the second sleeve 41.

[0062] In other embodiments, the locking member 90 is slidably disposed on the second housing 42 , and correspondingly, the locking hole 42 a is disposed on the second sleeve 41 .

[0063] In yet other embodiments, the locking member 90 is rotatably connected to the second housing 42 or the second sleeve 41, with a point on the locking member 90 rotatably connected to the second housing 42 or the second sleeve 41, and the locking member 90 is provided with a free end adapted to be inserted into the lock hole 42a. Specifically, the locking member 90 is rotatably disposed outside the second sleeve 41, with the free end of the locking member 90 adapted to pass through a clearance hole on the second sleeve 41 and be inserted into the lock hole 42a of the second housing 42. Alternatively, the locking member 90 is rotatably disposed inside the second housing 42, with the lock hole 42a provided on the second sleeve 41. In this case, the opening on the second sleeve 41 can be reused as the lock hole 42a and the second gear hole 41a.

[0064] It can be understood that the present application does not limit the specific movable connection method between the locking member 90 and the second shell 42 or the second sleeve 41, as long as the second shift member 43 and the locking member 90 can both achieve the one-way locking function respectively and the locking directions are different.

[0065] In this embodiment, Figure 13As shown, the second ISOFIX telescopic mechanism 40 also includes a second connecting locking block 45, which can be driven by an external force to move toward the side where the second shift member 43 is located until it contacts the second shift member 43, so that the second shift member 43 is driven by the second connecting locking block 45 to rotate, so that the locking protrusion 431 exits the second shift hole 41a. At this time, the second shell 42 can freely extend relative to the second sleeve 41, but cannot retract due to the action of the locking member 90.

[0066] Specifically, such as Figure 15 As shown, the insertion portion 91 includes a locking surface 911 and a guide surface 912. The second housing 42 is adapted to drive the locking member 90 out of the lock hole 42a by abutting against the guide surface 912. The second housing 42 is adapted to achieve position limiting by abutting against the locking surface 911. When the second housing 42 is extended relative to the second sleeve 41, the second housing 42 abuts against the guide surface 912, causing the locking member 90 to slide upward from the position indicated by the dotted line until it exits the current lock hole 42a, allowing the second housing 42 to extend outward. When the locking member 90 encounters the next lock hole 42a, it has a tendency to move downward into the lock hole 42a under the action of the corresponding reset mechanism of the locking member 90 or its own gravity. At this time, if the second housing 42 continues to extend outward, the second housing 42 abuts against the guide surface 912 again to push open the locking member 90.

[0067] More specifically, the locking surface 911 is disposed away from the second shift member 43 and is a plane substantially perpendicular to the lock hole 42a, while the guide surface 912 is an inclined surface disposed toward the second shift member 43. The inserting portion 91 has a simple structure and is easy to process and form.

[0068] When the locking member 90 is moved upward by external force, the insertion portion 91 leaves the locking hole 42a, the locking surface 911 does not conflict with the second shell 42, and the second connecting locking block 45 does not interfere with the second shift member 43. At this time, the second shift member 43 can leave the second shift hole 41a, and the second shell 42 can retract freely relative to the second sleeve 41.

[0069] It is understood that when the second ISOFIX telescopic mechanism 40 is installed on the car seat 10, the second gear member 43 is manually unlocked to put the ISOFIX mechanism in the Figure 13 In the state shown, adjust the ISOFIX mechanism to the maximum length and align it with the anchor rod, then unlock the locking member 90 to make the ISOFIX mechanism in the Figure 14 As shown in the state, the safety seat 20 is then pushed toward the backrest of the car seat 10 to retract the second shell 42 to a suitable position, and finally the locking member 90 is released and inserted into the lock hole 42a, so that the locking member 90 and the second shift member 43 are both inserted into the corresponding lock hole 42a or the second shift hole 41a, as shown in FIG. Figure 12 In this state, the second ISOFIX telescopic mechanism 40 can achieve length locking.

[0070] As an improvement, considering that the upper part of the second sleeve 41 is blocked by other parts of the safety seat 20, in order to facilitate the control and adjustment of the position of the locking member 90, the locking member 90 also includes a connecting portion 92, and the connecting portion 92 is connected to an operating member through a transmission mechanism. The transmission mechanism and the operating member are both provided on the safety seat 20. By operating the operating member, the transmission mechanism can drive the locking member 90 to slide up and down, and the transmission mechanism and the operating member are linked with the locking member 90, and the locking member 90 is unlocked or locked by applying force to the connecting portion 92.

[0071] In some embodiments, the transmission mechanism includes a steel cable, which is easy to arrange. The installation of the steel cable does not affect the existing internal structure of the safety seat 20, and the steel cable transmission does not require power supply, saving energy. The connecting portion 92 is a circular through hole, which is convenient for passing the steel cable. The relevant content of the steel cable transmission can be referred to the principle of bicycle brakes and will not be repeated here.

[0072] In order to allow the second housing 42 to expand and contract to different degrees, the second shift member 43 and the locking member 90 can be inserted into corresponding holes respectively. The number and hole spacing of the second shift holes 41a and the locking holes 42a are the same, and the ISOFIX mechanism can be locked at multiple different lengths.

[0073] Furthermore, the second gear hole 41a and the lock hole 42a have the same size and shape, which unifies the specifications of the second gear hole 41a and the lock hole 42a, making it easier to process and open the holes.

[0074] As a supplement, the ISOFIX mechanism also includes a first reset member suitable for resetting the second gear member 43, and a second reset member suitable for resetting the second connecting lock block 45. More specifically, the first reset member and the second reset member are both tension springs with simple structure and low cost.

[0075] Embodiment 4: Based on the above embodiment, this embodiment provides another specific structure of the second ISOFIX telescopic mechanism 40. The second ISOFIX telescopic mechanism 40 includes a second sleeve 41, a second shell 42 slidably arranged in the second sleeve 41, and a second gear member 43 rotatably arranged in the second shell 42. The second gear member 43 is suitable for rotating from a locked position to an unlocked position to unlock the second sleeve 41. The locking device is configured as a latch 80 and an elastic member 70. The latch 80 is arranged relative to the second gear member 43. The elastic member 70 is suitable for maintaining the latch 80 in the initial position. When the second shell 42 has an acceleration to retract into the second sleeve 41, the latch 80 overcomes the reset force of the elastic member 70 due to its own inertia and moves from the initial position to the rotation path of the second gear member 43 to prevent the second gear member 43 from rotating to unlock the second sleeve 41.

[0076] It can be understood that when the second shell 42 has an acceleration to retract into the second sleeve 41, the elastic member 70 needs to apply a large forward pulling force to the latch 80 in order to make the latch 80 and the second shell 42 move ahead with the same acceleration. When the required force is greater than the reset force that the elastic member 70 can provide to the latch 80, the elastic member 70 is deformed, and the latch 80 lags and leaves the initial position.

[0077] More specifically, Figure 16-Figure 19 As shown, in this example, the locking device also includes a mounting seat 60, which is connected to the second shell 42 and is arranged relative to the second gear member 43. The pin 80 is slidably set on the mounting seat 60, and the elastic member 70 applies a reset force to the pin 80 away from the second gear member 43 to maintain the pin 80 in the initial position.

[0078] like Figure 16 As shown, at this time, the latch 80 is in the initial position, and the locking protrusion 431 of the second gear member 43 passes through the upper tube wall of the second shell 42 and is inserted into the second gear hole 41a of the second sleeve 41. At this time, the second gear member 43 is in the locked position, and the second sleeve 41 is locked relative to the second shell 42 and cannot be stretched.

[0079] Under normal circumstances, such as when the car is driving at a constant speed or when the ISOFIX telescopic mechanism is installed on the car seat 10, when the acceleration of the second shell 42 relative to the latch 80 is small or zero, the latch 80 cannot overcome the restoring force of the elastic member 70 and interferes with the second shift member 43, and the second shift member 43 is not able to move as Figure 17 The second housing 42 is rotated to the unlocking position to unlock the second sleeve 41 , and the second housing 42 can be retracted into the second sleeve 41 .

[0080] When installing the ISOFIX telescopic mechanism to the car seat 10, first manually unlock the second gear member 43 to stretch the ISOFIX telescopic mechanism to its longest position, align the latch teeth with the car anchor rod and push them inwards so that the latch teeth engage with the car anchor rod, and then push the safety seat 20 toward the backrest of the car seat 10. At this time, the ISOFIX telescopic mechanism enters Figure 17 In the state shown, the ISOFIX telescopic mechanism is retracted like a conventional ISOFIX telescopic mechanism without a locking device, so as to facilitate rapid installation of the ISOFIX telescopic mechanism on the vehicle seat 10 .

[0081] After the ISOFIX telescopic mechanism is installed on the car seat 10, if a rear-end collision occurs while the car is driving, or the car accelerates and the safety seat 20 is thrown backward, the car will move forward at a high acceleration, that is, the second housing 42 will move forward relative to the latch 80 at a high acceleration. Figure 18As shown, the force of the rightward movement of the latch 80 is greater than the leftward restoring force applied by the elastic member 70. The latch 80 blocks the rotation path of the second gear member 43 before the second gear member 43 escapes from the second gear hole 41a, locking the second gear member 43 in the locked position. The second shell 42 cannot retract inwardly relative to the second sleeve 41 instantaneously.

[0082] Correspondingly, one end of the second shift member 43 is provided with a raised portion 432 adapted to abut against the latch 80. The raised portion 432 has a curved abutting surface, which abuts against the bottom surface 601 of the latch 80, exerting an upward force on the latch 80. The latch 80 abuts against the upper tube wall of the second housing 42 and exerts a downward force on the curved abutting surface, thereby preventing the second shift member 43 from rotating. The locking protrusion 431 of the second shift member 43, inserted into the second shift hole 41a, exerts a leftward force on the second sleeve 41, forcing it to move along with the second housing 42. The interaction force between the curved abutting surface and the latch 80 acts vertically, and no horizontal force component is generated to cause the latch 80 to slide.

[0083] The ISOFIX telescopic mechanism also includes a reset member suitable for resetting the second gear member 43. The reset member is an elastic structure, such as a tension spring. When the vehicle resumes constant speed or stops, the second gear member 43 is reset by the reset member, and the arc surface of the resistance moves away from the bottom surface 601 of the pin 80. The pin 80 is reset to the left by the reset action of the elastic member 70.

[0084] Furthermore, when the latch 80 is in the initial position, the elastic member 70 is in an unnatural state. The mounting base 60 is provided with a stopper 61 adapted to abut against the latch 80, thereby cooperating with the elastic member 70 to maintain the latch 80 in the initial position under normal circumstances. It will be understood that the "unnatural state" herein refers to the elastic member 70 being in a compressed or stretched state. Because the latch 80 is subjected to a significant elastic restoring force in the initial position, only when the second housing 42 experiences a sufficiently large acceleration relative to the latch 80 can the latch 80 overcome the force of the elastic member 70 and begin to move toward the second shift member 43. By designing the deformation of the elastic member 70 in the initial position, the acceleration threshold at which the latch 80 initiates movement can be adjusted. By selecting the elastic coefficient of the elastic member 70, the latch 80 can rapidly move after the current acceleration exceeds the set acceleration threshold, reaching above the second shift member 43 and interfering with it before the second shift member 43 exits the second shift hole 41a.

[0085] Furthermore, along the direction approaching the second shift member 43, the latch 80 includes a first end 81, an intermediate connecting section 82, and a second end 83, which are sequentially arranged. The intermediate connecting section 82 is arranged along the length of the second housing 42. The elastic member 70 is arranged parallel to the intermediate connecting section 82. The first end 81 or the second end 83 is arranged perpendicular to the intermediate connecting section 82 to connect to the elastic member 70. The second end 83 is adapted to be inserted above the second shift member 43 along the length of the second housing 42. The elastic member 70 and the latch 80 are both arranged along the length of the second housing 42. The latch 80 slides along the length of the second housing 42 to be inserted above the second shift member 43. The elastic force, the sliding direction of the latch 80, and the acceleration direction of the second housing 42 relative to the latch 80 are all aligned, preventing the latch 80 from deviating from the slide rail on the mounting base 60.

[0086] In this embodiment, the first end 81 and the second end 83 are both arranged perpendicular to the middle connecting section 82, giving the latch 80 a concave shape. The stopper 61 is disposed between the first end 81 and the second end 83. The elastic member 70 is a compression spring, which is low-cost and available in a wide variety of specifications. One end of the compression spring abuts the first end 81, and the other end abuts the side of the stopper 61 away from the second shifting member 43. The side of the stopper 61 near the second shifting member 43 is adapted to abut the second end 83. When the latch 80 is in the initial position, the compression spring is compressed by the second shifting member 43 and the stopper 61, continuously applying a leftward force to the second shifting member 43. The compression spring and the stopper 61 are both disposed in a recessed area in the middle of the concave-shaped latch 80, resulting in a compact structure. The stopper 61 serves both to abut the latch 80 and to mount the compression spring, resulting in a streamlined structure.

[0087] In other embodiments, the elastic member 70 may be configured as a tension spring. In other embodiments, the latch 80 may be configured as a shape other than the concave shape, such as an L-shape.

[0088] More specifically, the mounting base 60 includes a bottom surface 601 601 disposed at the bottom of the latch 80, and a first side surface 602 and a second side surface 603 disposed on either side of the latch 80. The bottom surface 601, first side surface 602, and second side surface 603 together form a slide rail for the latch 80 to slide. An opening is provided on the top of the mounting base 60 to facilitate installation of the latch 80 and the elastic member 70 within the slide rail. The first and second end portions 81, 83 extend out of the opening to contact the upper wall of the second housing 42. Furthermore, the portions of the first and second end portions 81, 83 that contact the upper wall of the second housing 42 are curved surfaces to reduce friction between the latch 80 and the upper wall of the second housing 42 during sliding.

[0089] The middle connecting section 82 is provided with a contact protrusion 821 for reducing the contact area. The contact protrusion 821 contacts the bottom surface 601 of the mounting seat 60 to reduce the friction between the latch 80 and the bottom surface 601 of the mounting seat 60, thereby reducing the resistance force other than the elastic member 70 when the latch 80 slides.

[0090] A first convex portion 6021 protruding toward the second side 603 is provided on the first side 602, and a corresponding second convex portion 6031 is provided on the second side 603. The first convex portion 6021 and the second convex portion 6031 constitute a limiting portion 61. The limiting portion 61 has a simple structure and is easy to process and form.

[0091] Example 5: Based on the above embodiment, this embodiment provides another specific structure of the second ISOFIX telescopic mechanism 40, such as Figure 20-21 As shown, the second ISOFIX telescopic mechanism 40 includes a second sleeve 41, a second shell 42 slidably arranged in the second sleeve 41, and a second gear member 43 rotatably arranged in the second shell 42. The second gear member 43 is suitable for rotating from a locked position to an unlocked position to unlock the second sleeve 41. The locking device is provided as a latch 80 and an elastic member 70. The latch 80 is arranged relative to the second gear member 43. The elastic member 70 is suitable for maintaining the latch 80 in the initial position. When the second shell 42 has an acceleration to retract into the second sleeve 41, the latch 80 overcomes the reset force of the elastic member 70 due to its own inertia and moves from the initial position to the rotation path of the second gear member 43 to prevent the second gear member 43 from rotating to unlock the second sleeve 41.

[0092] Furthermore, unlike the fourth embodiment, in this embodiment, the elastic member 70 is arranged along the height direction of the second shell 42, one end of the elastic member 70 is connected to the second shell 42, and a latch 80 is provided on the other end. The elastic member 70 continuously applies a reset force to the latch 80 to keep the latch 80 in the initial position. When the second shell 42 has an acceleration to retract into the second sleeve 41, one end of the elastic member 70 is driven by the second shell 42, and the other end is offset by the inertia of the latch 80, so that the latch 80 swings to the rotation path of the second gear member 43 under its own inertia and the action of the elastic member 70, thereby preventing the second gear member 43 from rotating and unlocking.

[0093] Furthermore, the latch 80 is disposed on top of the elastic member 70. The latch 80 has a first protrusion 831 extending toward the second shift member 43. The second shift member 43 has a corresponding protrusion 432. When the second shift member 43 is rotated to unlock, the protrusion 432 rotates upward until it abuts against the first protrusion 831. It is understood that when the latch 80 swings, the elastic member 70 bends to the right. At this time, the elastic member 70 also has the ability to move leftward to return to its original vertical state.

[0094] Under normal circumstances, when the acceleration of the second housing 42 is small, the force required by the elastic member 70 to drive the latch 80 to move synchronously with the second housing 42 to the left is small, and the elastic member 70 can always maintain a vertical state without bending. Figure 20 As shown, since the latch 80 can be fixed in the initial position by the elastic member 70 or reset to the initial position in time, and the second shift member 43 only rotates relative to the second shell 42 without shifting left or right, the latch 80 will not interfere with the rotation of the second shift member 43, and the second shift member 43 can rotate normally to unlock the second sleeve 41. However, when the acceleration of the second shell 42 is large, a large force needs to be applied to the latch 80 to make the latch 80 move to the left synchronously with the second shell 42. The required force exceeds the reset force F1 that the elastic member 70 can apply to the latch 80 for the leftward movement, resulting in the speed of the latch 80 lagging behind the second shell 42. At the same time, the elastic member 70 tilts to the right as a whole, as shown in FIG. Figure 21 As shown, the latch 80 eventually swings to above the second shift member 43 , and the two interfere with each other, causing the second shift member 43 to be unable to continue rotating and unlock the second sleeve 41 .

[0095] As a preferred embodiment, the latch 80 is detachably connected to the elastic member 70, and the latch 80 can be removed for maintenance and replacement.

[0096] Furthermore, the latch 80 is provided with a rod-shaped portion 832 , which is suitable for being inserted into the elastic member 70 for plugging, and the connection method is simple and easy to assemble.

[0097] Furthermore, a rounded corner is provided at the end of the rod-shaped portion 832 for guiding when the rod-shaped portion 832 is inserted into the corresponding hole of the elastic member 70 .

[0098] Preferably, the elastic member 70 is a spring, and the latch 80 can be fixed by inserting the rod-shaped portion 832 into the inner ring of the spring. The structure is simple, the installation of the latch 80 is easy to operate, and the spring has low cost and a wide range of choices. It can be understood that by designing the wire diameter, material, and effective number of turns of the spring, the elastic coefficient of the spring and the value of the horizontal leftward reset force F1 that can be generated after the spring is bent and deformed can be changed, so that when the acceleration of the second shell 42 exceeds a preset value, the spring can bend and deform quickly, so that the latch 80 swings to the top of the second gear member 43 before the second gear member 43.

[0099] The latch 80 is provided with a second protrusion 833 , and the second protrusion 833 and the first protrusion 831 are respectively located on both sides of the elastic member 70 , so that when the latch 80 is in the initial position, its center of gravity is located above the elastic member 70 , preventing the elastic member 70 from tilting due to the gravity of the latch 80 .

[0100] Specifically, latch 80 is generally T-shaped, with first and second protrusions 831 and 833 symmetrically positioned to ensure that the center of gravity of latch 80 is directly above elastic member 70. The top of latch 80 is a curved surface, adapted to contact the upper wall of second housing 42, thereby reducing friction from the upper wall of second housing 42 during the swinging and resetting of latch 80. Latch 80 has a simple structure and can be integrally formed.

[0101] The end of the protrusion 432 is provided with a contact plane 4322 suitable for contacting the latch 80, and a recessed portion 4321 suitable for avoiding the latch 80 is provided on one side of the contact plane 4322 to prevent the upper surface of the second gear member 43 from exerting a force to move leftward on the latch 80, thereby squeezing the latch 80 out from above the second gear member 43. A contact curved surface 4323 extends downward on the other side of the contact plane 4322. When the latch 80 is in the initial position and the second gear member 43 is rotated to the unlocked position, the contact curved surface 4323 contacts the latch 80, that is, when the latch 80 is in the initial position, it is just at the edge of the rotation path of the protrusion 432, which enables the latch 80 to be inserted between the upper surface of the second gear member 43 and the upper tube wall of the second shell 42 to interfere with the second gear member 43 when the spring bends to the right at a smaller angle.

[0102] A reset member is provided between the protrusion 432 and the second housing 42 . The reset member is suitable for resetting the second shift member 43 . Specifically, the reset member is a tension spring, which is easy to install and has low cost.

[0103] The latch 80 is connected to the second shell 42 through a mounting base 60. The mounting base 60 includes a bottom surface and a first side surface and a second side surface arranged on both sides of the bottom surface. The upper side of the bottom surface is connected to the elastic member 70, and the lower side is connected to the lower tube wall of the second shell 42. The first side surface and the second side surface are spaced apart along the width direction of the second shell 42. The elastic member 70 is at least partially blocked by the first side surface and the second side surface to provide a shielding and protective effect for the elastic member 70.

[0104] A mounting boss is provided on the bottom surface of the mounting seat 60, and the elastic member 70 is detachably plugged into the mounting boss. The elastic member 70 can be removed for replacement. When the elastic member 70 is a spring, the installation can be completed by inserting the inner ring of the spring into the mounting boss. The mounting structure is simple, and the end of the mounting boss is provided with a rounded corner to facilitate the insertion of the spring. The mounting seat 60 is integrally formed, has good structural strength, and reduces the processing and assembly steps.

[0105] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A safety seat, characterized by: The invention comprises a first ISOFIX retractable mechanism and a second ISOFIX retractable mechanism which are independently arranged. The first ISOFIX retractable mechanism and the second ISOFIX retractable mechanism are symmetrically arranged and are suitable for connection with a car seat. One of the first ISOFIX retractable mechanism and the second ISOFIX retractable mechanism can automatically retract, and the other is provided with a locking device to prevent retraction, so that the safety seat can be rotated left or right.

2. The safety seat according to claim 1, wherein: The safety seat includes a seat body, and the first ISOFIX telescopic mechanism and the second ISOFIX telescopic mechanism are respectively arranged on the left and right sides of the bottom of the seat body, wherein the first ISOFIX telescopic mechanism includes a first sleeve and a first shell, the first shell is slidably arranged in the first sleeve, the first sleeve is arranged on one side of the bottom of the seat body, and the first shell is suitable for connecting to the anchor rod of the car seat, and the second ISOFIX telescopic mechanism includes a second sleeve and a second shell, the second shell is slidably arranged in the second sleeve, the second sleeve is arranged on the other side of the bottom of the seat body, and the second shell is suitable for connecting to the anchor rod on the other side of the car seat.

3. The safety seat according to claim 2, wherein: A base is provided at the bottom of the seat body, and the base includes an upper base shell and a lower base shell. The upper base shell and the lower base shell are connected up and down to form an installation cavity. The installation cavity is annular. The first sleeve is connected to the lower base shell through a first connecting member, and the second sleeve is connected to the lower base shell through a second connecting member. The first sleeve and the second sleeve are both arranged in the installation cavity.

4. The safety seat according to claim 3, wherein: The first connecting member is an L-shaped connecting member, which includes a first plate body and a second plate body arranged perpendicular to each other. The first plate body is connected to the side wall of the first sleeve, and the second plate body is connected to the lower shell of the base. The lower shell of the base is provided with a mounting column, and the second plate body is provided with a corresponding mounting hole. Along the length direction of the first sleeve, the mounting columns are set to two, and the mounting holes are set to two. The second connecting member is also an L-shaped connecting member.

5. The safety seat according to any one of claims 2 to 4, characterized in that: The safety seat is further provided with a supporting curved surface suitable for supporting the head of a child passenger. The safety seat includes a C-shaped headrest, and the supporting curved surface is the inner side surface of the headrest.

6. The safety seat according to any one of claims 2 to 4, characterized in that: A first gear member, a first latching tooth, a first connecting locking block and an elastic reset mechanism are provided in the first shell. The first gear member is rotatably connected to the first shell via a front axle pin, and the first latching tooth is rotatably connected to the first shell via a rear axle pin. The first latching tooth is suitable for engaging with the automobile anchor rod. A plurality of first gear holes arranged at intervals are provided on the first sleeve. The first gear member is suitable for being inserted into the first gear hole to lock the first sleeve. The elastic reset mechanism is suitable for applying opposite forces to the first connecting locking block and the first latching tooth, and the end of the first connecting locking block just contacts the first latching tooth, so that the first latching tooth is locked in the current position.

7. The safety seat according to any one of claims 1 to 4, characterized in that: The second ISOFIX telescopic mechanism includes a second sleeve, a second shell slidably arranged in the second sleeve, and a second gear member rotatably arranged in the second shell. The locking device is set as a locking member. The second sleeve is provided with a plurality of second gear holes. The second gear member is provided with a locking protrusion suitable for inserting into the second gear hole to prevent the second shell from extending relative to the second sleeve. The locking member is movably provided on one of the second sleeve and the second shell, and the other is provided with a plurality of locking holes. The locking member is provided with an insertion portion suitable for inserting into the locking hole to prevent the second shell from retracting relative to the second sleeve.

8. The safety seat according to claim 7, wherein: The locking member is slidably arranged above the second sleeve, the multiple lock holes are arranged on the second shell, the insertion portion includes a locking surface and a guide surface, the second shell is suitable for driving the locking member to leave the lock hole by abutting against the guide surface, the second shell is suitable for limiting by abutting against the locking surface, the locking surface is arranged back to the second gear member, the locking surface is a plane basically perpendicular to the lock hole, and the guide surface is an inclined surface arranged toward the second gear member.

9. The safety seat according to any one of claims 1 to 4, characterized in that: The second ISOFIX telescopic mechanism includes a second sleeve, a second shell slidably arranged in the second sleeve, and a second gear member rotatably arranged in the second shell, the second gear member is suitable for rotating from a locked position to an unlocked position to unlock the second sleeve, the locking device is configured as a latch and an elastic member, the latch is arranged relative to the second gear member, the elastic member is suitable for maintaining the latch in an initial position, when the second shell has an acceleration to retract into the second sleeve, the latch overcomes the reset force of the elastic member due to its own inertia and moves from the initial position to the rotation path of the second gear member, so as to prevent the second gear member from rotating to unlock the second sleeve.

10. The safety seat according to claim 9, wherein: The locking device also includes a mounting seat, which is connected to the second shell and is arranged relative to the second gear member. The pin is slidably arranged on the mounting seat. The elastic member applies a reset force to the pin away from the second gear member. The mounting seat is provided with a limiting portion, which is suitable for contacting the pin to cooperate with the elastic member to keep the pin in the initial position.

11. The safety seat according to claim 9, wherein: The elastic member is arranged along the height direction of the second shell, one end of the elastic member is connected to the second shell, and the other end is provided with the latch. The elastic member continuously applies a reset force to the latch to keep the latch in the initial position. When the second shell has an acceleration to retract into the second sleeve, one end of the elastic member is driven by the second shell, and the other end is deviated by the inertia of the latch, so that the latch swings to the rotation path of the second gear member, thereby preventing the second gear member from rotating and unlocking. The latch is arranged at the top of the elastic member.

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