A cushioning energy-absorbing device and a child safety seat

Abstract

The application discloses a buffering energy-absorbing device and a child safety seat, relates to the technical field of automobile safety accessories, and is used for connecting a first component and a second component. The buffering energy-absorbing device comprises a main shell fixed to the second component, a pull rod with a first end connected to the first component, a second end of the pull rod slidably extending into the main shell, two or more sliding blocks, the two or more sliding blocks being sleeved on the second end of the pull rod, a buffering space being formed between the sliding blocks, the pull rod and the inner wall of the main shell, an energy-absorbing assembly arranged in the buffering space and in contact with the two or more sliding blocks, and an adjusting assembly used for connecting at least one sliding block and the pull rod. In the case that the first component and the second component move relatively, the sliding blocks connected with the pull rod are extruded to realize buffering and energy absorption.

Description

Technical Field

[0001] This application belongs to the field of automotive safety accessories technology, specifically relating to a cushioning energy-absorbing device and a child safety seat. Background Technology

[0002] A child safety seat is a seat that is fixed to a car seat for a child to ride in, and which restrains the child to maximize their safety in the event of a high-speed collision. With the increasing prevalence of private cars, the use of child safety seats is becoming more and more common. When a car collides or decelerates, the child safety seat may slide, roll over, or fall out due to inertia.

[0003] ISOFIX (International Standards Organization FIX) is a child safety seat restraint system. ISOFIX not only ensures the safety of child safety seats but also makes installation between the child safety seat and the car seat quick and easy. When a child safety seat is used by a younger child, it is typically secured by the five-point harness integrated into the child safety seat. When used by an older child, the car seat's seatbelt is used to secure both the child and the child safety seat. However, this method of securing both the child and the car seat via the car seatbelt can have drawbacks during emergency braking or a collision. In such cases, certain structures in the vehicle may experience significant tensile forces. If these forces are not adequately cushioned, excessive localized acceleration can occur, causing the child safety seat to pull the child forward rapidly. This can result in the car seatbelt strangling the child, causing injury. Furthermore, existing cushioning devices lack adjustable cushioning levels. Summary of the Invention

[0004] To address the technical problem that current child car seats do not provide adequate cushioning when subjected to tensile forces, this application provides a cushioning energy-absorbing device and a child safety seat.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] A first aspect of this application provides a buffer energy-absorbing device for connecting a first component and a second component. The buffer energy-absorbing device includes: a main housing fixed to the second component; a pull rod with a first end connected to the first component and a second end slidably extending into the main housing; two or more sliding blocks, each of which is sleeved on the second end of the pull rod, and the sliding blocks, the pull rod, and the inner wall of the main housing forming a buffer space; an energy-absorbing assembly disposed within the buffer space and in contact with the two or more sliding blocks; and an adjustment assembly for connecting at least one of the sliding blocks to the pull rod; wherein, when the first component and the second component move relative to each other, the pull rod drives the sliding block connected to the pull rod to compress the energy-absorbing assembly to achieve buffer energy absorption.

[0007] In some embodiments, the adjusting assembly includes a connecting unit connected to a sliding block, and the second end of the pull rod is provided with a connecting portion, the connecting unit extending into the connecting portion.

[0008] In some embodiments, the connecting part is a connecting hole or a slot;

[0009] The adjustment assembly also includes an adjustment rod, which is slidably engaged with a pull rod. One of the adjustment rod and the pull rod is provided with two or more connecting holes corresponding to the sliding block, and the other is provided with a slot corresponding to the sliding block. The connecting unit extends into the slot through the connecting hole.

[0010] In some embodiments, the second end of the pull rod is provided with a guide groove, and the adjusting rod includes:

[0011] The first rod body, the slot is provided on the outside of the first rod body;

[0012] The second rod has one end connected to the first rod, and the other end of the second rod extends through the connecting unit to the outside of the main housing. By pulling the second rod, the first rod is driven to slide in the guide groove, so as to connect different numbers of sliding blocks with the pull rod.

[0013] In some embodiments, the sliding block has at least one mounting groove on the side near the pull rod, and the connecting unit includes:

[0014] The connector has one end set in the mounting groove, and the other end of the connector extends into the slot through the connecting hole;

[0015] An elastic element is disposed between the connector and the groove wall of the mounting groove. When the second rod slides to the designated position, the connector extends into the slot so that the sliding block, adjusting rod and pull rod are connected as a whole and move together.

[0016] In some embodiments, the first rod and the second rod have different cross-sectional areas, and the connection between the first rod and the second rod is provided with an inclined surface; and / or, the end of the connector is provided with an inclined surface.

[0017] In some embodiments, the cross-sectional radius of the plurality of sliding blocks extends from the second end to the first end of the pull rod, and the contact area between the plurality of sliders and the energy-absorbing component decreases.

[0018] In some embodiments, the sliding block is a cone with an isosceles trapezoidal cross-section, and the inclined surfaces between the sliding blocks form a continuous surface; or, the sliding block is a rectangle, and the side surfaces of the sliding blocks form a stepped surface.

[0019] In some embodiments, a locking hook is provided at the first end of the pull rod.

[0020] A second aspect of this application provides a child safety seat, including a seat body and a cushioning energy-absorbing device, wherein the main housing of the cushioning energy-absorbing device is fixed to the seat body, and the pull rod of the cushioning energy-absorbing device is connected to the vehicle body.

[0021] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0022] This application discloses a buffer energy-absorbing device. By fixing the main housing to the second component and connecting the pull rod to the first component, when an impact occurs, the pull rod drives the sliding block to squeeze the energy-absorbing component, achieving a buffering effect. This effectively avoids damage caused by excessive local acceleration between the first and second components. By adjusting the component to control different numbers of sliding blocks connected to the pull rod, different numbers of sliding blocks can be controlled to apply different force areas to buffer the energy-absorbing component, thereby achieving the technical effect of controlling the buffer level of the device. Furthermore, multiple levels of adjustment can be made according to the weight of the second component.

[0023] This application discloses a child safety seat that connects the seat body and the car by setting up a buffer energy-absorbing device. By fixing the main shell to the seat body and connecting the pull rod to the car, when a collision occurs, the pull rod drives the sliding block to squeeze the energy-absorbing component, achieving a buffering effect. This effectively avoids injury caused by excessive local acceleration between the seat body and the car. By adjusting the component to control different numbers of sliding blocks connected to the pull rod, different numbers of sliding blocks apply different force areas to the energy-absorbing component to achieve the technical effect of controlling the buffering level of the device. This allows for multiple levels of adjustment according to the weight of the child on the seat body. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a buffer energy absorption device according to an embodiment;

[0026] Figure 2 This is a partial structural schematic diagram of a pneumatic head-generating device according to an embodiment;

[0027] Figure 3 This is a structural cross-sectional view of a buffer energy absorption device according to an embodiment;

[0028] Figure 4 This is a partial schematic diagram of a structural explosion of a buffer energy-absorbing device according to an embodiment;

[0029] Figure 5 This is a schematic diagram of the structure of a buffer energy absorption device according to an embodiment, showing the device fully released at all positions.

[0030] Figure 6 This is a schematic diagram of a locking mechanism of a buffer energy absorption device according to an embodiment;

[0031] Figure 7 This is a schematic diagram of the two-position locking structure of a buffer energy absorption device according to an embodiment;

[0032] Figure 8 This is a schematic diagram of the energy absorption of a buffer energy absorption device with two-position locking according to an embodiment;

[0033] Figure 9 This is a schematic diagram of the three-position locking structure of a buffer energy absorption device according to an embodiment;

[0034] Figure 10 This is a structural schematic diagram of a child safety seat according to an embodiment.

[0035] The reference numerals in the attached drawings are explained as follows: 100, main housing; 200, pull rod; 210, guide groove; 221, connecting hole; 300, sliding block; 310, connecting unit; 311, connector; 312, elastic element; 320, mounting groove; 331, first slider; 332, second slider; 333, third slider; 400, energy-absorbing assembly; 410, energy-absorbing block; 500, adjusting rod; 510, first rod body; 511, slot; 520, second rod body; 600, seat body; 610, bottom frame; 620, buffer energy-absorbing device; 700, locking hook. Detailed Implementation

[0036] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] Please see Figures 1-3 .

[0038] Figure 1 This is a schematic diagram of the structure of a buffer energy absorption device according to an embodiment of this application. Figure 2 This is an exploded structural diagram of a buffer energy absorption device according to an embodiment of this application. Figure 3 This is a structural cross-sectional view of a buffer energy absorption device according to an embodiment of this application, such as... Figures 1-3 As shown, the device is used to connect a first component and a second component. The buffer energy absorption device 620 includes: a main housing 100 fixed to the second component; a pull rod 200, with its first end connected to the first component and its second end slidably extending into the main housing 100; two or more sliding blocks 300, each of which is sleeved on the second end of the pull rod 200, forming a buffer space between the sliding blocks 300, the pull rod 200, and the inner wall of the main housing 100; an energy absorption assembly 400 disposed within the buffer space and in contact with the two or more sliding blocks 300; and an adjustment assembly for connecting at least one sliding block 300 to the pull rod 200. When the first component and the second component move relative to each other, the pull rod 200 drives the sliding block 300 connected to the pull rod 200 to compress the energy absorption assembly 400 to achieve buffer energy absorption. By fixing the main housing 100 to the second component and connecting the pull rod 200 to the first component, when an impact occurs, the pull rod 200 drives the sliding block 300 to squeeze the energy-absorbing component 400, achieving a buffering effect. This effectively avoids damage caused by excessive local acceleration between the first and second components. By adjusting the component to control different numbers of sliding blocks 300 connected to the pull rod 200, different numbers of sliding blocks 300 can be controlled to apply different force areas to buffer the energy-absorbing component 400, thereby achieving the technical effect of controlling the buffer level of this device. Furthermore, multiple levels can be adjusted according to the weight of the second component.

[0039] In some embodiments, the second component is a child safety seat, and the first component is a car.

[0040] In this embodiment, the main housing 100 is rectangular, and the inner cavity of the main housing 100 is also rectangular.

[0041] In other embodiments, the main housing 100 may also be elliptical, parallelogram or other geometric shapes, but a rectangle occupies the least area and has the highest space utilization.

[0042] Please see Figure 4 , Figure 4 This is a partial schematic diagram of the structural explosion of a buffer energy absorption device according to an embodiment of this application;

[0043] In some embodiments, the adjustment assembly includes a connecting unit 310 connected to the sliding block 300, and the second end of the pull rod 200 is provided with a connecting hole 221, into which the connecting unit 310 extends.

[0044] In some embodiments, the adjustment assembly includes a connecting unit 310 connected to the sliding block 300, and the second end of the pull rod 200 is provided with a connecting portion, the connecting unit 310 extending into the connecting portion.

[0045] In some embodiments, the second end of the pull rod 200 is provided with a guide groove 210, and the connecting part is a connecting hole 221 or a slot 511;

[0046] The adjustment assembly also includes an adjustment rod 500, which is slidably engaged with the pull rod 200. One of the adjustment rod 500 and the pull rod 200 is provided with two or more connecting holes 221 corresponding to the sliding block 300, and the other is provided with a slot 511 corresponding to the sliding block 300. The connecting unit 310 extends into the slot 511 through the connecting hole 221.

[0047] In some embodiments, the adjusting lever 500 includes:

[0048] The first rod body 510, and the slot 511 is provided on the outside of the first rod body 510;

[0049] The second rod 520 has one end connected to the first rod 510, and the other end of the second rod 520 extends through the connecting unit 310 to the outside of the main housing 100. By pulling the second rod 520, the first rod 510 is driven to slide in the guide groove 210, so as to realize the connection of different numbers of sliding blocks 300 with the pull rod 200.

[0050] In other embodiments, a connecting hole may be provided on the adjusting rod 500, and a slot may be provided on the pull rod 200. The adjusting rod 500 is sleeved on the pull rod, and the sliding block 300 is sleeved on the adjusting rod 500. By sliding the adjusting rod 500, the connecting unit 310 on the sliding block 300 passes through the connecting hole and connects with the slot on the pull rod.

[0051] In some embodiments, the sliding block 300 is provided with at least one mounting groove 320 on the side near the pull rod 200, and the connecting unit 310 includes:

[0052] The connector 311 has one end disposed in the mounting groove 320, and the other end of the connector 311 passes through the connecting hole 221 and extends into the slot 511.

[0053] The elastic element 312 is disposed between the connector 311 and the groove wall of the mounting groove 320. When the second rod 520 slides to the designated position, the connector 311 extends into the slot 511 so that the sliding block 300, the adjusting rod 500 and the pull rod 200 are connected as a whole and move together.

[0054] In some embodiments, the first rod 510 and the second rod 520 have different cross-sectional areas, and the connection between the first rod 510 and the second rod 520 is provided with an inclined surface; specifically, the cross-sectional area of ​​the second rod is smaller than that of the first rod. This ensures that when the adjusting rod 500 is pulled, the connecting piece 311 slides more smoothly onto the first rod 510.

[0055] In some embodiments, the end of the connector 311 is provided with a bevel, which allows the connector 311 to slide more smoothly into the slot 511.

[0056] Specifically, the elastic element 312 is not connected to the connector 311 or the mounting groove 320. The cross-sectional area of ​​the second rod 520 is small. When the connector 311 contacts the second rod 520 under the force of the elastic element 312, the sliding block 300, the elastic element 312, and the connector 311 are in a relaxed state. When an impact occurs, the movement of the pull rod 200 will not cause the relaxed sliding block 300 to move. The longitudinal width of the first rod 510 is large. When the second rod 520 is pulled, causing the connector 311 to contact the first rod 510, the first rod 510 will compress the elastic element 312, so that the sliding block 300, the adjusting rod 500, and the pull rod 200 are locked at the first stage under the force of the elastic element 312. When the connector 311 enters the slot 511, a second stage of locking is achieved. When an impact occurs, the pull rod 200 causes the locked sliding block 300 to squeeze the energy-absorbing component 400.

[0057] In other embodiments, the technical effect of locking the sliding block 300 by squeezing the elastic member 312 can be achieved without setting the card 511. However, after setting the card 511, the connecting member 311 extends into the card 511, and the locking effect is better.

[0058] In some embodiments, the connector 311 is a ball bearing. In other embodiments, the connector 311 may also be a rigid connecting element such as a connecting key or a connecting rod.

[0059] In some embodiments, the upper part of the pull rod 200, the upper part of the sliding block 300, and the inner wall of the main housing 100 form a first buffer space, and the lower part of the pull rod 200, the lower part of the sliding block 300, and the inner wall of the main housing 100 form a second buffer space. The energy-absorbing component 400 includes two energy-absorbing blocks 410, which are respectively filled in the first buffer space and the second buffer space.

[0060] In some embodiments, the energy-absorbing block 410 is made of EPP (expanded polypropylene), a highly crystalline polymer / gas composite material, which has the characteristics of being lightweight, having good cushioning performance, good plasticity, and being recyclable.

[0061] In other embodiments, the energy-absorbing block 410 may also be made of materials such as EVA, rubber, latex, or sponge.

[0062] In some embodiments, the cross-sectional radius of the plurality of sliding blocks 300 decreases from the second end to the first end of the pull rod 200, and the contact area between the plurality of sliders and the energy absorption component 400 tends to decrease.

[0063] In some embodiments, the sliding block 300 is a cone with an isosceles trapezoidal cross-section, and the inclined surfaces between each sliding block 300 form a continuous surface;

[0064] In other embodiments, the slider 300 is rectangular, and the sides of each slider 300 form a stepped surface.

[0065] In some embodiments, the first end of the pull rod 200 is provided with a locking hook 700.

[0066] In some embodiments, the sliding block 300 is a truncated pyramid with an isosceles trapezoidal cross section. There are three sliding blocks 300, which are the first slider 331, the second slider 332, and the third slider 333 from the side near the pull rod 200 to the side near the adjusting rod 500.

[0067] Specifically, the connection between the short side of the first slider 331 and the pull rod 200 is provided with a rounded corner transition. The length of the short side of the second slider 332 is equal to the length of the long side of the first slider 331. The length of the long side of the second slider 332 is equal to the length of the short side of the third slider 333. The length of the long side of the third slider 333 is equal to the width of the inner wall of the main shell. This arrangement allows the inclined surfaces between each slider 300 to form a continuous surface. When two sliders 300 are used together, the energy-absorbing block 410 can be squeezed more smoothly.

[0068] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a buffer energy absorption device with all its settings fully released, as described in an embodiment of this application.

[0069] In some embodiments, such as Figure 5 As shown, at this time, the first slider 331, the second slider 332 and the third slider 333 are not connected to the first rod 510, and the pull rod 200 is in a neutral state. When a collision occurs, the pull rod 200 will not drive the sliding block 300 to squeeze the energy-absorbing block 410.

[0070] Please see Figure 6 , Figure 6 This is a schematic diagram of the first locking position of a buffer energy absorption device according to an embodiment of this application;

[0071] In some embodiments, such as Figure 6 As shown, at this time, the first slider 331 is locked in the slot 511 of the first rod 510, the second slider 332 and the third slider 333 are not connected to the first rod 510, and the pull rod 200 is in the first position. When a collision occurs, the pull rod 200 drives the first slider 331 to squeeze the energy-absorbing block 410 through the adjusting rod 500, while the second slider 332 and the third slider 333 remain stationary. The energy absorption effect in this position is relatively weak and is suitable for use when the load on the child seat is less than 10KG.

[0072] Please see Figures 7-8 , Figure 7 This is a schematic diagram of the two-position locking structure of a buffer energy absorption device according to an embodiment of this application; Figure 8 This is a schematic diagram of the energy absorption of a buffer energy absorption device with two-stage locking in an embodiment of this application.

[0073] In some embodiments, such as Figure 7 As shown, at this time, the first slider 331 and the second slider 332 are engaged and locked in the slot 511 of the first rod 510, the third slider 333 is not connected to the first rod 510, and the pull rod 200 is in the second position. Figure 8 As shown, when a collision occurs, the lever 200 drives the first slider 331 and the second slider 332 to compress the energy-absorbing block 410 via the adjusting rod 500, while the third slider 333 remains stationary. The energy absorption effect of this setting is always maintained, making it suitable for use when the load on the child seat is 10KG to 20KG.

[0074] Please see Figure 9 , Figure 9 This is a schematic diagram of the three-position locking structure of a buffer energy absorption device according to an embodiment of this application;

[0075] In some embodiments, such as Figure 9As shown, at this time, the first slider 331, the second slider 332 and the third slider 333 are all locked in the slot 511 of the first rod 510, and the pull rod 200 is in the third position. When a collision occurs, the pull rod 200 drives the first slider 331, the second slider 332 and the third slider 333 to squeeze the energy-absorbing block 410 through the adjusting rod 500. This position has the highest energy absorption effect and is suitable for use when the load on the child seat is greater than 20KG.

[0076] In other embodiments, four, five, six, or seven sliding blocks 300 may be provided on the lever 200 to achieve four, five, six, or seven gear adjustments.

[0077] Please see Figure 10 , Figure 10 This is a structural schematic diagram of a child safety seat according to an embodiment of this application;

[0078] A second aspect of this application provides a child safety seat, including a seat body 600 and a buffer energy-absorbing device 620. The main housing 100 of the buffer energy-absorbing device 620 is fixed to the seat body 600, and the pull rod 200 of the buffer energy-absorbing device 620 is connected to the vehicle body via a locking hook 700. By setting the buffer energy-absorbing device 620 to connect the seat body 600 and the vehicle, and by fixing the main housing 100 to the seat body 600 and connecting the pull rod 200 to the vehicle, when a collision occurs, the pull rod 200 drives the sliding block 300 to compress the energy-absorbing component 400, achieving a buffering effect and effectively preventing injury caused by excessive local acceleration between the seat body 600 and the vehicle. By adjusting the component to control different numbers of sliding blocks 300 connected to the pull rod 200, different numbers of sliding blocks 300 are controlled to apply different force areas to the energy-absorbing component 400 for buffering, thereby achieving the technical effect of controlling the buffering level of the device. This allows for multi-level adjustment based on the weight of the child on the seat body.

[0079] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0080] This application discloses a buffer energy-absorbing device. By fixing the main housing to the second component and connecting the pull rod to the first component, when an impact occurs, the pull rod drives the sliding block to squeeze the energy-absorbing component, achieving a buffering effect. This effectively avoids damage caused by excessive local acceleration between the first and second components. By adjusting the component to control different numbers of sliding blocks connected to the pull rod, different numbers of sliding blocks can be controlled to apply different force areas to buffer the energy-absorbing component, thereby achieving the technical effect of controlling the buffer level of the device. Furthermore, multiple levels of adjustment can be made according to the weight of the second component.

[0081] This application discloses a child safety seat that connects the seat body and the car by setting up a buffer energy-absorbing device. By fixing the main shell to the seat body and connecting the pull rod to the car, when a collision occurs, the pull rod drives the sliding block to squeeze the energy-absorbing component, achieving a buffering effect. This effectively avoids injury caused by excessive local acceleration between the seat body and the car. By adjusting the component to control different numbers of sliding blocks connected to the pull rod, different numbers of sliding blocks apply different force areas to the energy-absorbing component to achieve the technical effect of controlling the buffering level of the device. This allows for multiple levels of adjustment according to the weight of the child on the seat body.

[0082] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0084] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0085] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0086] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A buffer energy absorption device for connecting a first component and a second component, characterized in that, The buffer energy absorption device includes: The main housing is fixed to the second component; A pull rod, with its first end connected to the first component and its second end slidably extending into the main housing; Two or more sliding blocks, both of which are sleeved on the second end of the pull rod, and the sliding blocks, the pull rod and the inner wall of the main housing form a buffer space; An energy-absorbing component is disposed within the buffer space and is in contact with two or more of the sliding blocks; An adjustment assembly for connecting at least one of the sliding blocks to the pull rod; When the first component and the second component move relative to each other, the pull rod drives the sliding block connected to the pull rod to squeeze the energy-absorbing component to achieve buffer energy absorption. The adjustment assembly includes a connecting unit connected to the sliding block, and the second end of the pull rod is provided with a connecting part, the connecting unit extending into the connecting part; The connecting part is a connecting hole or a slot; The adjustment assembly also includes an adjustment rod, which is slidably engaged with a pull rod. One of the adjustment rod and the pull rod is provided with two or more connecting holes corresponding to the sliding block, and the other is provided with a slot corresponding to the sliding block. The connecting unit extends into the slot through the connecting hole. The second end of the pull rod is provided with a guide groove, and the adjusting rod slides in the guide groove; The sliding block has at least one mounting groove on the side near the pull rod, and the connecting unit includes: The connector has one end set in the mounting groove, and the other end of the connector extends into the slot through the connecting hole; An elastic element is disposed between the connector and the wall of the mounting groove; The cross-sectional radius of the plurality of sliding blocks decreases from the second end to the first end of the pull rod, and the contact area between the plurality of sliders and the energy absorption component decreases.

2. The buffer energy absorption device according to claim 1, characterized in that the adjusting rod include: The first rod body, the slot is provided on the outside of the first rod body; The second rod has one end connected to the first rod, and the other end of the second rod extends through the connecting unit to the outside of the main housing. By pulling the second rod, the first rod is driven to slide in the guide groove, so as to connect different numbers of sliding blocks with the pull rod.

3. The buffer energy absorption device according to claim 2, characterized in that, When the second rod slides to the designated position, the connector extends into the slot, so that the sliding block, adjusting rod and pull rod are connected as a whole and move together.

4. The buffer energy absorption device according to claim 2, characterized in that, The first rod and the second rod have different cross-sectional areas, and the connection between the first rod and the second rod is provided with an inclined surface; and / or, the end of the connector is provided with an inclined surface.

5. The buffer energy absorption device according to claim 1, characterized in that, The sliding block is a cone with an isosceles trapezoidal cross-section, and the inclined surfaces between each sliding block form a continuous surface; Alternatively, the sliders are rectangular, and the sides of each slider form a stepped surface.

6. The buffer energy absorption device according to claim 1, characterized in that, The first end of the pull rod is equipped with a locking hook.

7. A child safety seat, characterized in that, It includes a seat body and a cushioning energy-absorbing device as described in any one of claims 1 to 6, wherein the main housing of the cushioning energy-absorbing device is fixed to the seat body, and the pull rod of the cushioning energy-absorbing device is connected to the vehicle body.

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