Support leg extension device and child safety seat

Abstract

The application discloses a supporting leg telescopic device and a child safety seat, and relates to the technical field of safety seats. The supporting leg telescopic device comprises a shell, a release lock, an outer tube, a locking piece and a locking mechanism. The shell is sleeved on the outer wall of the outer tube, and the release lock, the locking piece and the locking mechanism are arranged in the outer tube. The release lock is fixedly connected with the shell. The release lock moves along the length direction of the outer tube to control the locking or separation of the locking piece and the locking mechanism, so as to adjust the relative position between the shell and the outer tube. The locking piece and the locking mechanism can cooperate with each other. The release lock is used for controlling the locking piece. The locking or separation between the locking piece and the locking mechanism is realized by controlling the locking piece to be close to or away from the locking mechanism. The release lock in the outer tube is controlled to move by pulling the shell, so that the locking piece and the locking mechanism are locked or separated, the relative position between the shell and the outer tube is adjusted, the length of the supporting leg telescopic device is changed, and the structure is simple and convenient to stretch and retract.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of child safety seats, in particular to a supporting leg telescoping device and a child safety seat. BACKGROUND

[0002] A safety seat is a seat attached to a car seat, a car accessory device with binding protection, designed for children of different weights (or age groups), which can effectively improve the safety of children riding in cars. In the case of car collision or sudden deceleration, it can reduce the impact on children and limit the movement of children's bodies to reduce their injuries.

[0003] A supporting leg is generally provided below the front of the safety seat to resist the bottom surface of the car, which can increase the firmness of the safety seat and improve safety. However, the existing supporting leg structure is relatively complex and inconvenient to operate. Therefore, the present application is proposed. SUMMARY

[0004] The purpose of the present application is to provide a supporting leg telescoping device and a safety seat to solve the technical problem of inconvenient telescoping of the supporting leg in the prior art.

[0005] The embodiments of the present application are implemented as follows:

[0006] In one aspect of the embodiments of the present application, a supporting leg telescoping device is provided, which includes a shell, a release lock, an outer tube, a locking piece and a locking mechanism. The shell is sleeved on the outer wall of the outer tube, the release lock, the locking piece and the locking mechanism are arranged inside the outer tube, the release lock is fixedly connected with the shell, and the release lock moves along the length direction of the outer tube to control the locking piece and the locking mechanism to lock or separate to adjust the relative position between the shell and the outer tube.

[0007] Optionally, the locking mechanism includes a fixed piece, an inner gear tube, a first spring and a second spring. The inner gear tube is fixedly connected with the outer tube, the fixed piece is arranged between the release lock and the inner gear tube, the side wall of the fixed piece is provided with a through hole and a groove, the locking piece slides in the through hole and is locked or separated with the inner gear tube under the control of the release lock, the first spring and the second spring are respectively fixed on the two side walls opposite to the groove, and the release lock is provided with a baffle between the first spring and the second spring and fixedly connected with the first spring and the second spring.

[0008] Optionally, the supporting leg telescoping device further includes an inner tube arranged between the release lock and the outer tube, and the inner tube is fixedly connected with the fixed piece.

[0009] Optionally, the locking piece is provided with a flange, the release lock is provided with a track, and the flange slides in the track to approach or move away from the inner gear tube.

[0010] Optionally, the outer wall of the inner gear tube is provided with a first gear rack extending along the length direction of the inner gear tube, and the side of the locking member facing the inner gear tube is provided with a second gear rack matched with the first gear rack, and the second gear rack is inserted into the first gear rack to fix the locking member on the inner gear tube.

[0011] Optionally, the first gear rack includes two first gear racks oppositely arranged on the two sides of the inner gear tube, and the locking member includes two second gear racks matched with the two first gear racks respectively.

[0012] Optionally, the end of the inner gear tube is provided with an inner gear tube fixing member, the fixing member is provided with a sliding channel for the inner gear tube fixing member to slide, and one end of the sliding channel is located on the fixing member close to the first end of the groove, and the other end is located between the first end and the through hole.

[0013] Optionally, the support leg telescopic device further includes a foot pad arranged at the end of the shell and the release member, and the shell and the release member are fixedly connected through the foot pad.

[0014] Optionally, the end of the inner tube is provided with an inner tube fixing member, and a third spring is arranged between the inner tube fixing member and the foot pad, and the extension direction of the third spring is parallel to the length direction of the inner tube.

[0015] In another aspect of the embodiment of the present application, a child safety seat is provided, which includes the above support leg telescopic device.

[0016] The beneficial effects of the embodiment of the present application include:

[0017] The embodiment of the present application provides a support leg telescopic device, which comprises a shell, a release lock, an outer tube, a locking piece and a locking mechanism. The shell is sleeved on the outer wall of the outer tube, and the release lock, the locking piece and the locking mechanism are arranged in the inner part of the outer tube. The release lock is fixedly connected with the shell, and the release lock moves along the length direction of the outer tube to control the locking or separation of the locking piece and the locking mechanism, so as to adjust the relative position between the shell and the outer tube. The shell is sleeved on the outer part of the outer tube and can move up and down along the length direction of the outer tube. The total length of the combination of the shell and the outer tube is the length of the support leg telescopic device. The shell and the inner part of the outer tube are hollow, and together form a containing space for containing the release lock, the locking piece and the locking mechanism. The locking piece and the locking mechanism can cooperate with each other, and the release lock is used for controlling the locking piece. The locking or separation between the locking piece and the locking mechanism is realized by controlling the locking piece to be close to or away from the locking mechanism. The release lock is fixedly connected with the shell, and the movement of the shell can drive the movement of the release lock in the outer tube, and then control the locking piece and the locking mechanism. When the locking piece and the locking mechanism cooperate and realize locking, the relative position between the outer tube and the shell is unchanged, and the overall length of the support leg telescopic device is unchanged. When the locking piece and the locking mechanism are separated from each other, the shell can freely slide relative to the outer tube, so as to change the overall length of the support leg telescopic device. The above support leg telescopic device controls the movement of the release lock in the outer tube by pulling the shell, and then makes the locking piece and the locking mechanism lock or separate, so as to adjust the relative position between the shell and the outer tube, change the length of the support leg telescopic device, and have simple structure and convenient telescopic.

[0018] The embodiment of the present application further provides a child safety seat, which comprises the above support leg telescopic device. When the child safety seat is used, the support leg telescopic device thereon can be adjusted in length to abut against the bottom surface of the vehicle, so that the child safety seat is convenient to install, has good firmness and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure schematic diagram of the support leg telescopic device provided by the embodiment of the present application in the fully contracted state is shown in the figure.

[0021] Figure 2 The structure schematic diagram of the support leg telescopic device provided by the embodiment of the present application in the fully contracted state is shown in the figure. Figure 1 The partial enlarged schematic diagram of the A in the figure.

[0022] Figure 3 The partial enlarged schematic diagram of the B in the figure. Figure 1 The partial enlarged schematic diagram of the B in the figure.

[0023] Figure 4 A structural schematic view of the support leg telescopic device in the extended state according to an embodiment of the present application;

[0024] Figure 5 A partial enlarged view of the middle C; Figure 4

[0025] Figure 6 A partial enlarged view of the middle D; Figure 4

[0026] Figure 7 A structural schematic view of the support leg telescopic device in the extended state according to an embodiment of the present application;

[0027] Figure 8 A partial enlarged view of the middle E; Figure 7

[0028] Figure 9 A partial enlarged view of the middle F; Figure 7

[0029] Figure 10 A structural schematic view of the support leg telescopic device in the extended state according to an embodiment of the present application;

[0030] Figure 11 A partial enlarged view of the middle G; Figure 10

[0031] Figure 12 A partial enlarged view of the middle H; Figure 10

[0032] Figure 13 A structural schematic view of the support leg telescopic device in the extended state according to an embodiment of the present application;

[0033] Figure 14 A partial enlarged view of the middle I; Figure 13

[0034] Figure 15 A partial enlarged view of the middle J; Figure 13

[0035] Figure 16 A structural schematic view of the support leg telescopic device in the extended state according to an embodiment of the present application;

[0036] Figure 17 A partial enlarged view of the middle K; Figure 16

[0037] Figure 18 A partial enlarged view of the middle L; Figure 16 ​​​​​​​​​​

[0038] Figure 19 The structure diagram of the cooperation between the releasing element and the locking element in the support leg telescopic device provided by the embodiment of the present application.

[0039] Icon: 100-support leg telescopic device; 110-housing; 120-releasing element; 121-baffle; 122-rail; 130-outer tube; 140-locking mechanism; 141-fixing element; 1411-through hole; 1412-groove; 1413-slide; 142-locking element; 1421-flange; 1422-second rack; 143-inner gear tube; 1431-first rack; 144-first spring; 145-second spring; 150-inner tube; 160-inner gear tube fixing element; 170-foot pad; 180-inner tube fixing element. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0042] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0044] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0046] Please refer to Figures 1 to 3 The embodiment provides a support leg telescopic device 100, which comprises an outer shell 110, a release lock 120, an outer tube 130, a locking piece 142 and a locking mechanism 140. The outer shell 110 is sleeved on the outer wall of the outer tube 130, the release lock 120, the locking piece 142 and the locking mechanism 140 are arranged in the inner part of the outer tube 130, the release lock 120 is fixedly connected with the outer shell 110, and the release lock 120 moves along the length direction of the outer tube 130 to control the locking or separation of the locking piece 142 and the locking mechanism 140, so as to adjust the relative position between the outer shell 110 and the outer tube 130.

[0047] The outer shell 110 is sleeved on the outer part of the outer tube 130 and can move up and down along the length direction of the outer tube 130, and the total length of the combination of the outer shell 110 and the outer tube 130 is the length of the support leg telescopic device 100. The inner parts of the outer shell 110 and the outer tube 130 are hollow, and together form a containing space for containing the release lock 120, the locking piece 142 and the locking mechanism 140. The locking piece 142 and the locking mechanism 140 can cooperate with each other, the release lock 120 is used for controlling the locking piece 142, the locking or separation between the locking piece 142 and the locking mechanism 140 is realized by controlling the locking piece 142 to move close to or away from the locking mechanism 140. The release lock 120 is fixedly connected with the outer shell 110, and pulling the outer shell 110 to move can drive the release lock 120 in the outer tube 130 to move, and then control the locking piece 142 and the locking mechanism 140. When the locking piece 142 and the locking mechanism 140 cooperate and realize locking, the relative position between the outer tube 130 and the outer shell 110 does not change, and the overall length of the support leg telescopic device 100 does not change. When the locking piece 142 and the locking mechanism 140 are separated from each other, the outer shell 110 can freely slide relative to the outer tube 130 to change the overall length of the support leg telescopic device 100.

[0048] The support leg telescopic device 100 described above controls the movement of the release lock 120 in the outer tube 130 by pulling the outer shell 110, and then makes the locking piece 142 and the locking mechanism 140 lock or separate, so as to realize the adjustment of the relative position between the outer shell 110 and the outer tube 130, change the length of the support leg telescopic device 100, and have simple structure and convenient telescopic.

[0049] Please continue to refer to Figures 1 to 3Optionally, the locking mechanism 140 comprises a fixing member 141, an inner gear tube 143, a first spring 144 and a second spring 145, the inner gear tube 143 is fixedly connected with the outer tube 130, the fixing member 141 is arranged between the releasing member 120 and the inner gear tube 143, the fixing member 141 is provided with a through hole 1411 and a groove 1412 on the side wall thereof, the locking member 142 slides in the through hole 1411 and is locked or separated from the inner gear tube 143 under the control of the releasing member 120, the first spring 144 and the second spring 145 are fixed on the two opposite side walls of the groove 1412 respectively, the releasing member 120 is provided with a baffle 121, the baffle 121 is located between the first spring 144 and the second spring 145 and is fixedly connected with the first spring 144 and the second spring 145.

[0050] The fixing member 141 is used for mounting the locking member 142 and forming a movable connection between the fixing member 141 and the releasing member 120, the fixing member 141 is provided with the through hole 1411, the locking member 142 is arranged in the through hole 1411, and the locking member 142 slides back and forth in the through hole 1411 under the control of the releasing member 120 to be locked or separated from the locking mechanism 140. In addition, the fixing member 141 is further provided with the groove 1412, the baffle 121 of the releasing member 120 extends into the groove 1412 to divide the groove 1412 into two parts for accommodating the first spring 144 and the second spring 145 respectively, the first spring 144 and the second spring 145 are both fixedly connected with the groove 1412 at one end (i.e. fixedly connected with the fixing member 141) and fixedly connected with the baffle 121 at the other end, in this way, the releasing member 120 can move a preset distance relative to the fixing member 141 during the movement, and after moving the preset distance, the releasing member 120 can move together with the fixing member 141 under the action of the spring elastic force.

[0051] The inner gear tube 143 cooperates with the locking member 142 to be the part that is locked or separated from the locking member 142 in the locking mechanism 140. The inner gear tube 143 is fixedly connected with the outer tube 130, when the outer shell 110 moves relative to the outer tube 130, the outer shell 110 drives the releasing member 120 to move, thereby controlling the locking member 142 to be separated from the inner gear tube 143, the locking member 142 and the fixing member 141 move together with the releasing member 120, after being adjusted to the preset position (i.e. the overall length of the supporting leg telescopic device 100 meets the requirements), the locking member 142 is locked with the inner gear tube 143 again to realize the extension of the supporting leg telescopic device 100.

[0052] Specifically, please refer to Figures 1 to 3 , Figures 1 to 3The relative position and cooperation between each component when the support leg telescopic device 100 is completely in the contracted state are shown. At this time, the outer tube 130 is completely inserted into the outer shell 110, the release lock 120 controls the locking piece 142 to cooperate and lock with the inner gear tube 143, the first spring 144 and the second spring 145 are in a balanced state with each other, the relative position between the release lock 120 and the fixed piece 141 is unchanged, and the outer shell 110 and the outer tube 130 are locked with each other. Please refer to Figures 4 to 6 When it is needed to deploy the support leg telescopic device 100, the outer shell 110 is pulled downward, the release lock 120 moves downward together with the outer shell 110, the release lock 120 controls the locking piece 142 to separate from the inner gear tube 143, and the locking is released. At the same time, the release lock 120 moves downward, the baffle 121 of the release lock 120 stretches the first spring 144 and compresses the second spring 145, breaks the balance between the first spring 144 and the second spring 145, and makes the fixed piece 141 drive the locking piece 142 to move downward together with the release lock 120. Please refer to Figures 7 to 9 When the support leg telescopic device 100 is stretched to a preset length, the pulling of the outer shell 110 is stopped. During the above process of pulling the outer shell 110, the first spring 144 is always in a stretched state and the second spring 145 is always in a compressed state under the action of the release lock 120. Please refer to Figures 10 to 12 After the pulling of the outer shell 110 is stopped, no external force is applied to the outer shell 110. At this time, the release lock 120 is only subjected to the action force of the first spring 144 and the second spring 145, and the first spring 144 and the second spring 145 again realize a balanced state by pushing the baffle 121 of the release lock 120, that is, the first spring 144 and the second spring 145 simultaneously drive the baffle 121 to move upward, and then the release lock 120 moves upward. At this time, the release lock 120 again pushes the locking piece 142 to cooperate and lock with the locking mechanism 140, so as to fix the relative position between the outer shell 110 and the outer tube 130, and keep the overall length of the support leg telescopic device 100 unchanged. The above is the process of changing the support leg telescopic device 100 from the contracted state to the stretched state.

[0053] Please refer to Figures 13 to 15 When it is needed to change the support leg telescopic device 100 into the contracted state again, the outer shell 110 is pushed upward to drive the release lock 120 to move upward, so that the locking piece 142 is separated from the locking mechanism 140 again, the locking is released, and at the same time, the first spring 144 is compressed and the second spring 145 is stretched. After the unlocking, the outer shell 110 is continuously pushed, the release lock 120 drives the fixed piece 141 and the locking piece 142 to move upward, and the length of the support leg telescopic device 100 gradually decreases. Please refer to Figures 16 to 18, the pushing process of the shell 110, under the action of the release element 120, the first spring 144 is always in compression, and the second spring 145 is always in tension. Please refer to Figures 1 to 3 After stopping pushing the shell 110, no external force is applied to the shell 110, and the release element 120 is again only subjected to the action force of the first spring 144 and the second spring 145, and the first spring 144 and the second spring 145 again realize the balance state through the blocking plate 121 pushing the release element 120, that is, the first spring 144 and the second spring 145 simultaneously drive the blocking plate 121 to move downward, thereby making the release element 120 move downward, at this time, the release element 120 will again push the locking element 142 to cooperate with and lock the locking mechanism 140, to fix the relative position between the shell 110 and the outer tube 130, so that the overall length of the supporting leg telescopic device 100 remains unchanged. The above is the process of changing the supporting leg telescopic device 100 from the extended state to the retracted state.

[0054] Please refer to Figure 2 and Figure 8 Optionally, the supporting leg telescopic device 100 further comprises an inner tube 150 arranged between the release element 120 and the outer tube 130, and the inner tube 150 is fixedly connected with the fixing element 141.

[0055] The inner tube 150 is used to fix the fixing element 141 and move up and down with the fixing element 141, and at the same time, the inner tube 150 is arranged between the release element 120 and the outer tube 130, filling the gap between the release element 120 and the outer tube 130, and avoiding the supporting leg telescopic device 100 from shaking during the telescopic process.

[0056] Please refer to Figure 19 Optionally, the locking element 142 is provided with a flange 1421, and the release element 120 is provided with a track 122, and the flange 1421 slides in the track 122 to approach or move away from the inner gear tube 143.

[0057] The flange 1421 of the locking element 142 slides in the track 122 of the release element 120, which realizes the connection between the locking element 142 and the release element 120, and ensures the relative movement between the locking element 142 and the release element 120. During the up and down movement of the release element 120, the flange 1421 exists in the up and down sliding along the track 122, and exists in the left and right movement, so as to realize the locking and separation of the locking element 142 and the locking mechanism 140.

[0058] For example, the track 122 is wide at both ends and narrow in the middle, and the wider ends of the track 122 are located on the same side of the narrower middle section. Please refer to Figure 2When the flange 1421 is located on the narrower middle section of the track 122, the locking member 142 protrudes outwardly relative to the releasing member 120, and cooperates with the locking mechanism 140 to lock; Figure 5 and Figure 14 When the flange 1421 is located on the wider two ends of the track 122, the locking member 142 retracts inwardly relative to the releasing member 120, and separates from the locking mechanism 140 to unlock.

[0059] Please refer to Figure 1 and Figure 2 Optionally, the outer wall of the inner gear tube 143 is provided with a first gear rack 1431 extending along the length direction of the inner gear tube 143, and the side of the locking member 142 facing the inner gear tube 143 is provided with a second gear rack 1422 cooperating with the first gear rack 1431. The second gear rack 1422 is inserted into the first gear rack 1431 to fix the locking member 142 on the inner gear tube 143.

[0060] The locking member 142 and the inner gear tube 143 are locked in the length direction of the outer tube 130 and the shell 110 through the intermeshing of the gear racks. When the second gear rack 1422 is inserted into the first gear rack 1431, the shell 110 and the outer tube 130 are locked, and the relative position no longer changes, and the overall length of the support leg telescopic device 100 remains unchanged. When the second gear rack 1422 is separated from the first gear rack 1431, the shell 110 and the outer tube 130 are unlocked, and the shell 110 and the outer tube 130 can move relatively to adjust the overall length of the support leg telescopic device 100.

[0061] Optionally, the first gear rack 1431 includes two first gear racks 1431 oppositely arranged on the two sides of the inner gear tube 143, and the locking member 142 includes two second gear racks 1422 on the two locking members 142, respectively cooperating with the two first gear racks 1431.

[0062] The two locking members 142 are simultaneously locked or unlocked with the inner gear tube 143 on the opposite sides of the inner gear tube 143, so that the mechanism inside the outer tube 130 is more symmetrical, and the stress of the inner gear tube 143 is more balanced, and the locking is not loose or shaking during the stretching and contraction of the support leg telescopic device 100.

[0063] Please refer to Figure 7 and Figure 8 Optionally, the end of the inner gear tube 143 is provided with an inner gear tube fixing member 160, and the fixing member 141 is provided with a slide channel 1413 for the inner gear tube fixing member 160 to slide, one end of the slide channel 1413 is located on the fixing member 141 close to the first end of the groove 1412, and the other end is located between the first end and the through hole 1411.

[0064] The inner gear tube fixing member 160 is fixedly connected with the inner gear tube 143 and can slide in the sliding channel 1413 of the fixing member 141, the sliding channel 1413 is arranged below the locking member 142, one end of the sliding channel 1413 towards the locking member 142 is closed, and the fixing member 141 can be prevented from being separated from the inner gear tube 143 during downward movement of the fixing member 141 relative to the inner gear tube 143, thereby preventing excessive extension between the shell 110 and the outer tube 130.

[0065] Please refer to Figure 1 and Figure 3 Optionally, the support leg telescoping device 100 further comprises a foot pad 170 arranged at the end of the shell 110 and the release member 120, and the shell 110 and the release member 120 are fixedly connected through the foot pad 170.

[0066] The shell 110 and the release member 120 are both fixed on the foot pad 170 and are fixedly connected through the foot pad 170. Meanwhile, the foot pad 170 closes the bottom of the shell 110 to prevent foreign matters from entering the inside of the support leg telescoping device 100. In use, the foot pad 170 is in contact with the supporting surface, thereby increasing the contact area and making the support leg telescoping device 100 more stable in supporting.

[0067] In the embodiment, the connection mode between the foot pad 170 and the shell 110 and the release member 120 is not limited, as long as the fixed connection between the shell 110 and the release member 120 can be realized through the foot pad 170. For example, the foot pad 170 is welded with the shell 110 and the release member 120, or the foot pad 170 is provided with a protrusion and the shell 110 and the release member 120 are provided with a receiving groove corresponding to the protrusion, and the connection between the foot pad 170, the shell 110 and the release member 120 is realized through the cooperation between the protrusion and the receiving groove.

[0068] Optionally, the end of the inner tube 150 is provided with an inner tube fixing member 180, and a third spring is arranged between the inner tube fixing member 180 and the foot pad 170, and the extension direction of the third spring is parallel to the length direction of the inner tube 150.

[0069] The inner tube fixing member 180 is used to fix the inner tube 150 on the foot pad 170 to prevent the inner tube 150 from moving arbitrarily inside the shell 110. Meanwhile, the third spring is arranged between the inner tube fixing member 180 and the foot pad 170, and the third spring can play a buffering role when the shell 110 is pulled downward to make the foot pad 170 in contact with the supporting surface, so as to buffer the impact received by the support leg telescoping device 100.

[0070] The embodiment further provides a child safety seat comprising the above support leg telescoping device 100. In use, the support leg telescoping device 100 on the child safety seat can be in contact with the bottom surface of the vehicle through length adjustment, and the installation is convenient, the stability is good, and the safety is high.

[0071] In the foregoing explanation of the support leg telescoping device 100, the working manner and working principle of the support leg telescoping device 100 when arranged on the child safety seat have been described in detail, and thus will not be repeated here.

[0072] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A support leg retraction device, characterized by, The support leg telescopic device comprises a shell, a release lock, an outer tube, a locking piece and a locking mechanism, the shell is sleeved on the outer wall of the outer tube, the release lock, the locking piece and the locking mechanism are arranged inside the outer tube, the release lock is fixedly connected with the shell, the release lock moves along the length direction of the outer tube to control the locking or separation of the locking piece and the locking mechanism to adjust the relative position between the shell and the outer tube. The locking mechanism comprises a fixed piece, an inner gear tube, a first spring and a second spring, the inner gear tube is fixedly connected with the outer tube, the fixed piece is arranged between the release lock and the inner gear tube, a through hole and a groove are arranged on the side wall of the fixed piece, the locking piece slides in the through hole and is locked or separated with the inner gear tube under the control of the release lock, the first spring and the second spring are fixed on the two opposite side walls of the groove respectively, a baffle is arranged on the release lock, the baffle is located between and fixedly connected with the first spring and the second spring.

2. The support leg retraction apparatus of claim 1, wherein, An inner tube is further arranged between the release lock and the outer tube, and the inner tube is fixedly connected with the fixed piece.

3. The support leg retraction apparatus of claim 1, wherein, A flange is arranged on the locking piece, and a track is arranged on the release lock, the flange slides in the track to approach or move away from the inner gear tube.

4. The support leg retraction apparatus of claim 1, wherein, A first rack extending along the length direction of the inner gear tube is arranged on the outer wall of the inner gear tube, and a second rack matched with the first rack is arranged on the side of the locking piece facing the inner gear tube, the second rack is inserted into the first rack to fix the locking piece on the inner gear tube.

5. The support leg retraction apparatus of claim 4, wherein, The first rack comprises two first racks arranged on the two sides of the inner gear tube, and the locking piece comprises two locking pieces, and the two second racks on the two locking pieces are matched with the two first racks respectively.

6. The support leg retraction apparatus of claim 1, wherein, An inner gear tube fixing piece is arranged at the end of the inner gear tube, a slide channel for the inner gear tube fixing piece to slide is arranged on the fixing piece, one end of the slide channel is located on the fixing piece close to the first end of the groove, and the other end is located between the first end and the through hole.

7. The support leg retraction apparatus of claim 2, wherein, A foot pad is further arranged at the end of the shell and the release lock, and the shell and the release lock are fixedly connected through the foot pad.

8. The support leg retraction apparatus of claim 7, wherein, An inner tube fixing piece is arranged at the end of the inner tube, a third spring is arranged between the inner tube fixing piece and the foot pad, and the extension direction of the third spring is parallel to the length direction of the inner tube.

9. A child safety seat, characterized in that The support leg telescopic device comprises the support leg telescopic device according to any one of claims 1 to 8.

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