Child car seat base

Abstract

The present disclosure provides a base for a child car seat. The base includes a base bracket, an operating assembly, and a telescopic tube. The operating assembly includes a locking piece connected to the base bracket, and the telescopic tube is provided with a plurality of locking portions along its length. The locking portions are operable to engage with the locking portions such that the telescopic tube and the base bracket are locked to each other. The locking members are operable to disengage from the locking portions such that the telescopic tube and the base bracket can slide relative to each other. The child car seat base has a simple structure and low manufacturing costs.

Description

Technical Field

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[0001] The present disclosure relates to the technical field of child seats, and in particular to a base for a child seat.

Background Art

[0002] Isofix systems or other fixing systems for child seats generally have a base for adjusting the attachment position of the child seat in order to be compatible with attachment to different models of vehicles. However, currently, such bases tend to have a complex structure and high manufacturing costs.

Summary of the Invention

[0003] According to some embodiments, a base for a child seat is provided.

[0004] The base for the child seat includes a base bracket, an operating assembly, and a telescopic tube. The operating assembly includes a locking member connected to the base bracket. The telescopic tube is provided with a plurality of locking portions in its longitudinal direction. The locking member can operate to engage with one of the locking portions so that the telescopic tube and the base bracket are locked to each other. The locking member can operate to disengage from one of the locking portions so that the telescopic tube and the base bracket can slide relative to each other.

[0005] In one embodiment, the locking member is rotatably connected to the base bracket. The locking member can rotate to engage with one of the locking portions so that the telescopic tube and the base bracket are locked to each other. The locking member can rotate to disengage from one of the locking portions so that the telescopic tube and the base bracket can slide relative to each other.

[0006] In one embodiment, a male connection portion is provided on the locking member, and the locking portion is a female connection portion that can engage with the male connection portion.

[0007] In one embodiment, the locking member is provided with an engaging projection, and the locking portion is an engaging hole that can cooperate with the engaging projection.

[0008] In one embodiment, the engaging projection has a first side and a second side arranged along the extending direction of the expansion joint, the first side being an engaging inclined surface inclined toward the second side.

[0009] In one embodiment, the operating assembly further includes an operating member that can be operated to drive a locking member to engage with or disengage from a locking portion.

[0010] In one embodiment, the operating member includes an operating inclined surface. The operating member has a first position and a second position. When the operating member is in the first position, the operating inclined surface contacts the locking member, and the operating member can rotate to rotate the locking member. When the operating member is in the second position, the operating inclined surface and the locking member are separated from each other.

[0011] In one embodiment, the base further includes a first elastic member. The two ends of the first elastic member abut against the operating member and the base bracket, respectively.

[0012] In one embodiment, the operating member includes an operating body, an operating pillar, and a limiting hook. Both the operating pillar and the limiting hook protrude from the side of the operating body. The operating inclined surface is located at the end of the operating pillar, away from the operating body. The base bracket is provided with a housing groove configured to accommodate the operating member. A limiting projection is formed on the groove wall of the housing groove. When the operating member is mounted in the housing groove, the limiting hook can engage with the limiting projection to restrict the movement of the operating member toward the opening of the housing groove. The two ends of the first elastic member abut against the operating body and the bottom of the housing groove, respectively. The bottom of the housing groove has a through hole, and the operating pillar can pass through the through hole and abut against a locking member.

[0013] In one embodiment, the locking member includes a first locking piece and a second locking piece connected to each other and positioned at a specific angle. The first locking piece is provided along the extending direction of the expansion joint. The second locking piece is operable to allow the first locking piece to engage with a locking portion, and the second locking piece is operable to allow the first locking piece to disengage from the locking portion.

[0014] In one embodiment, the base further includes a second elastic member having two ends connected to a base bracket and a locking member, respectively, the elastic member always enabling the locking member to move toward and cooperate with the locking portion.

[0015] In one embodiment, the base further includes a fixing member fixed to the side of the base bracket. The two ends of the second elastic member are connected to the fixing member and the locking member, respectively. The locking member is rotatably connected to the fixing member.

[0016] In one embodiment, the base further includes a guide cylinder fixed to the side of the base bracket. The guide cylinder is located outside the telescopic tube, and the telescopic tube is slidable relative to the guide cylinder.

[0017] In one embodiment, the base further includes a connecting rod. An operating assembly is provided on each of the two sides of the base bracket, and each of the two ends of the connecting rod is secured to a corresponding locking member of the operating assembly.

[0018] In one embodiment, the base bracket includes a first support frame, a second support frame, and a synchronization member. The first and second support frames are spaced apart from each other. The two ends of the synchronization member are fixed to the first and second support frames, respectively, and each of the operating assemblies is positioned on the side of the first or second support frame away from the synchronization member.

[0019] These and other objects, advantages, objects, and features will become apparent upon consideration of the following specification in conjunction with the drawings.

[0020] To more clearly explain the technical solutions of the embodiments of the present disclosure, the accompanying drawings required for the embodiments of the present disclosure are briefly introduced below. Clearly, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings from these drawings without creative efforts.

Brief Description of the Drawings

[0021] [Figure 1] It is a schematic diagram showing a base for a child seat according to an embodiment of the present disclosure in a state where the telescopic tube is relatively short. [Figure 2] It is a schematic diagram showing a base for a child seat according to an embodiment of the present disclosure in a state where the telescopic tube is relatively extended. [Figure 3] It is a schematic diagram of the base for a child seat shown in FIG. 1 with the base housing omitted. [Figure 4] It is an enlarged view of part A shown in FIG. 3. [Figure 5] It is a cross-sectional view taken along line B-B shown in FIG. 3, where the engaging protrusion cooperates with the engaging hole. [Figure 6] It is an enlarged view of part C shown in FIG. 5. [Figure 7] It is a cross-sectional view taken along line B-B shown in FIG. 3, where the engaging protrusion does not cooperate with the engaging hole. [Figure 8] It is an enlarged view of part D shown in FIG. ⑦. [Figure 9] It is a schematic diagram showing an operating member in the base for a child seat shown in FIG. 3. [Figure 10] It is a bottom view of FIG. 1.

Explanation of Reference Numerals

[0022] The base body 10 The base housing 11 The base bracket 12 12a First support frame 12b Second support frame 12c Synchronizing member 13 Support Posts 20 Telescopic mechanism 100 Operating Assemblies 111 Fixing member 112 Guide Cylinder 102 Locking member 211 First locking piece 212 Second locking piece 213 Engagement protrusion 213a First side 213b Second side 103 Operating member 310 Operation slope 320 Operating Units 321 Pressing surface 330 Operating Pillar 340 Limit Hooks 30 Telescopic tube 31 Engagement hole 31a Locking part 400 First elastic member 500 Second elastic member 600 connecting rods 40 Anchor Assembly M First end N Second end [Modes for carrying out the invention]

[0023] Embodiments of the present invention will be described more fully below with reference to the accompanying drawings. However, various embodiments of the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so as to ensure that this disclosure is thorough and complete and to fully convey the scope of the present invention to those skilled in the art. Elements identified by the same or similar reference numerals refer to the same or similar elements.

[0024] In this specification, various elements may be described using terms such as "first," "second," etc., but it should be understood that these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. Thus, without departing from the teachings of the invention, the first element may be referred to as the second element.

[0025] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as their meanings in the context of the relevant art, and it can be further understood that they should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0026] As shown in Figures 1 to 4, a child seat base according to one embodiment of the present disclosure is provided, which includes a base body 10, an extension mechanism 20 for an anchor assembly 40 (ISO-FIX assembly), and an extension tube 30. The child seat base has a simple structure and low manufacturing cost.

[0027] Specifically, as shown in Figure 3, the base body 10 is generally positioned below the seat (not shown) and configured to support the seat. The base body 10 includes a base housing 11, a base bracket 12, and a support post 13. The base bracket 12 is positioned inside the base housing 11, and the support post 13 is fixed to the bottom of the base housing 11.

[0028] Optionally, as shown in Figures 2 and 3, the base bracket 12 includes a first support frame 12a and a second support frame 12b spaced apart from each other. The base bracket 12 further includes a synchronous member 12c connected and fixed between the first support frame 12a and the second support frame 12b, i.e., both ends of the synchronous member 12c are fixed to the first support frame 12a and the second support frame 12b, respectively. Optionally, the first support frame 12a, the second support frame 12b, and the synchronous member 12c all have a long structure and are made of steel. In other embodiments, the first support frame 12a, the second support frame 12b, and the synchronous member 12c may have other shapes and be made of other materials.

[0029] Specifically, as shown in Figures 2 to 4, the telescopic mechanism 20 includes an operating assembly 100, a first elastic member 400, a second elastic member 500, and a connecting rod 600.

[0030] As shown in Figures 3 and 4, the operating assembly 100 includes a fixing member 111, a guide cylinder 112, a locking member 102, and an operating member 103.

[0031] In this embodiment, as shown in Figure 3, an operating assembly 100 is provided on each of the two sides of the base bracket 12. The fixing member 111 of each operating assembly 100 is fixed to the side of the first support frame 12a or the second support frame 12b, away from the synchronous member 12c; that is, each fixing member 111 is fixed to the outer surface of the first support frame 12a or the second support frame 12b, respectively. The guide cylinder 112 of each operating assembly 100 is fixed to the side of the first support frame 12a or the second support frame 12b, away from the synchronous member 12c; that is, each guide cylinder 112 is fixed to the outer surface of the first support frame 12a or the second support frame 12b. In this embodiment, the cross-section of the guide cylinder 112 has a non-circular structure, for example, a quasi-square structure. The guide cylinder 112 and the fixing member 111, located on the same side, are positioned along the extending direction of the first support frame 12a or the second support frame 12b. Optionally, as shown in Figure 4, the guide cylinder 112 is positioned in front of the fixing member 111, the guide cylinder 112 is positioned below the fixing member 111, and the bottom surface of the fixing member 111 is connected to the top surface of the guide cylinder 112.

[0032] In this embodiment, as shown in Figure 3, the telescopic tube 30 is configured to connect to the anchor assembly 40, and the locking member 102 is connected to the base bracket 12. In this embodiment, the locking member 102 is rotatably connected to the base bracket 12. In other embodiments, the locking member 102 may be slidably connected to the base bracket 12. The telescopic tube 30 is provided with a plurality of locking portions 31a along its longitudinal direction. The locking member 102 is operable, for example, rotatable, to engage with one of the locking portions 31a so that the telescopic tube 30 and the base bracket 12 are locked together. The locking member 102 is also operable, for example, rotatable, to disengage from one of the locking portions 31a so that the telescopic tube 30 and the base bracket 12 can slide against each other.

[0033] In this way, the position of the telescopic tube 30 relative to the base bracket 12 can be adjusted by operating the locking member 102. As shown in Figures 1 and 2, the base bracket 12 includes a first end M and a second end N, corresponding to the leftmost and rightmost ends, respectively. The support post 13 is fixed to the first end M of the base bracket 12, and the telescopic tube 30 is movable to extend from the second end N. When the child seat is installed and secured in the vehicle, the length of the telescopic tube 30 extending from the second end N of the base bracket 12 can be adjusted by adjusting the position of the telescopic tube 30 relative to the telescopic tube 30, that is, the length of the anchor assembly 40 extending from the second end N of the base bracket 12 can be adjusted to meet the connection and securing requirements of different vehicle models. The above child seat base has a simple structure and low manufacturing cost.

[0034] Furthermore, as shown in Figure 4, the locking member 102 includes a first locking piece 211 and a second locking piece 212 connected to each other and positioned at a certain angle. For example, the first locking piece 211 and the second locking piece 212 may be perpendicular to each other and form an "L" shape. The first locking piece 211 is positioned along the extending direction of the expansion joint 30. The second locking piece 212 is operable, for example, rotatable, so that the first locking piece 211 engages with the locking portion 31a. The second locking piece 212 is operable, for example, rotatable, so that the first locking piece 211 disengages from the locking portion 31a. In this embodiment, the locking piece 102 is positioned above the guide cylinder 112. The end of the first locking piece 211, which is separated from the second locking piece 212, extends into the fixing member 111, and the first locking piece 211 is rotatably connected to the side wall of the fixing member 111.

[0035] Furthermore, as shown in Figure 4, the telescopic tube 30 is inserted into the guide cylinder 112, that is, the guide cylinder 112 is positioned outside the telescopic tube 30, and the telescopic tube 30 is slidable relative to the guide cylinder 112. Therefore, the guide cylinder 112 can guide the direction of movement of the telescopic tube 30 and prevent the telescopic tube 30 from deviating from the direction of movement during the sliding process. In this embodiment, the rearward direction refers to the direction from the first end M to the second end N, and the forward direction refers to the direction from the second end N to the first end M. The direction of movement is either forward or reverse.

[0036] Furthermore, the locking member 102 is provided with a male connector, and the locking portion 31a is a female connector that can engage with the male connector. In this embodiment, as shown in Figures 6 and 8, the locking member 102 may be provided with an engaging projection 213, specifically, the engaging projection 213 is provided on the first locking piece 211. The locking portion 31a is an engaging hole 31 that can engage with the engaging projection 213. Locking between the base bracket 12 and the expansion joint 30 is achieved by the engagement of the engaging projection 213 and the engaging hole 31, and the structure is simple and easy to implement. The engaging projection 213 has a first side surface 213a and a second side surface 213b arranged along the extending direction of the expansion joint 30, and the first side surface 213a is an engaging inclined surface inclined toward the second side surface 213b. In this embodiment, the first side surface 213a is located behind the second side surface 213b. If it is necessary to move the telescopic tube 30 forward of the base bracket 12, that is, to shorten the length of the telescopic tube 30 extending from the second end N of the base bracket 12 (referred to as the extension length), it is not necessary to operate the locking member 102, and the telescopic tube 30 can be moved directly forward of the base bracket 12, which is easy to operate and saves time and effort. The first side surface 213a may be located forward of the second side surface 213b. If it is necessary to move the telescopic tube 30 backward of the base bracket 12, that is, to lengthen the extension length of the telescopic tube 30, it is not necessary to operate the locking member 102, and the telescopic tube 30 can be moved directly backward of the base bracket 12.

[0037] In other embodiments, the locking member 102 may be provided with an engaging projection, and the locking portion 31a is an engaging groove that can engage with the engaging projection, provided that the locking member 102 and the locking portion 31a can engage with it, but is not limited to this.

[0038] Furthermore, as shown in Figure 4, the operating member 103 can be operated to rotate the locking member 102 to engage with or disengage from the locking portion 31a. Specifically, referring to Figure 9, the operating member 103 has an operating inclined surface 310, and the operating member 103 has a first position and a second position. When the operating member 103 is in the first position, the operating inclined surface 310 abuts against the locking member 102, and the operating member 103 is rotatable to rotate the locking member 102. When the operating member 103 is in the second position, the operating inclined surface 310 and the locking member 102 are separated.

[0039] Specifically, as shown in Figures 4 and 9, the operating member 103 includes an operating body 320, an operating pillar 330, and two limiting hooks 340 protruding from one side of the operating body 320. In this embodiment, limiting hooks 340 are provided on each of the two sides of the operating pillar 330. In other embodiments, the number and position of the limiting hooks 340 can also be adjusted accordingly. A pressing surface 321 for user pressure is formed on the surface of the operating body 320 facing away from the operating pillar 330 and the limiting hooks 340. An operating inclined surface 310 is provided at the end of the operating pillar 330 away from the operating body 320, and the base bracket 12 is provided with a housing groove (not shown) for housing the operating member 103, with limiting projections (not shown) formed on the groove wall of the housing groove. When the operating member 103 is mounted in the housing groove, the limiting hooks 340 can engage with the limiting projections to restrict the movement of the operating member 103 toward the opening of the housing groove. The bottom of the housing groove has a through hole (not shown), and the operating pillar 330 can pass through this through hole and abut against the locking member 102. Therefore, on the one hand, it is possible to restrict the operating member 103 from escaping from the opening of the housing groove, and on the other hand, it is not prevented from pressing the operating member 103 toward the bottom of the housing groove, thereby allowing the operating inclined surface 310 of the operating member 103 to abut against the locking member 102, and by rotating the operating member 103, the operating inclined surface 310 can be pressed to rotate the locking member 102, thereby causing the locking member 102 to engage with or disengage from the locking portion 31a.

[0040] Furthermore, as shown in Figure 4, both ends of the first elastic member 400 abut against the operating member 103 and the base bracket 12, respectively. Specifically, both ends of the first elastic member 400 abut against the operating body 320 and the bottom of the housing groove, respectively. The first elastic member 400 ensures that the operating member 103 always tends to move toward the opening of the housing groove. When a certain external force is applied to the pressing surface 321 of the operating member 103, the operating member 103 can overcome the elastic force of the first elastic member 400 and move toward the bottom of the groove, thereby causing the operating pillar 330 to pass through the through hole and abut against the locking member 102. Specifically, the operating pillar 330 abuts against the second locking piece 212. As shown in Figures 7 and 8, the operating pillar 330 is rotated such that the operating inclined surface 310 at the end of the operating pillar 330 presses against the locking member 102, causing the locking member 102 to rotate, thereby disengaging the engaging projection 213 of the first locking piece 211 from one of the engaging holes 31. As shown in Figures 5 and 6, once the length adjustment of the telescopic tube 30 is complete, the engaging projection 213 re-engages with the other engaging hole 31. Subsequently, the operating assembly 100 is reset under the action of the elastic force of the elastic member 400, which counteracts the external force applied to the pressing surface 321. After the reset, the operating assembly 100 and the locking member 102 are separated from each other. In this way, by directly pushing the telescopic tube 30 to shorten or lengthen its extension, interference between the operating member 103 and the locking member 102 can be avoided.

[0041] Optionally, as shown in Figure 4, first elastic members 400 are provided on both sides of the operating pillar 330. This allows the operating member 103 to apply a balanced elastic force. In this embodiment, the first elastic member 400 is a spring. In other embodiments, the first elastic member 400 may be a silicon elastic pillar or the like, but is not limited to this.

[0042] Furthermore, as shown in Figure 4, the two ends of the second elastic member 500 are specifically connected to the side wall of the fixing member 111 and the second locking piece 212, and the locking member 102 always tends to rotate in a direction that engages with the locking portion 31a. In this way, when the locking member 102 disengages from one of the locking portions 31a and the extension length of the telescopic tube 30 is adjusted, the external force applied to the operating member 103 can be offset, and the locking member 102 is automatically reset under the action of the elastic force of the second elastic member 500 and can re-engage with another locking portion 31a, thereby improving the cooperative stability between the locking member 102 and the locking portion 31a, and as a result, relative fixation between the telescopic tube 30 and the base bracket 12 can be ensured. In this embodiment, the second elastic member 500 is a torsion spring, but is not limited thereto.

[0043] Furthermore, as shown in Figures 3 and 4, the first locking piece 211 is rotatably connected to the side walls of the fixing members 111 on both sides of the base bracket 12. Therefore, it is convenient to adjust the extension length of the telescopic tubes 30 on both sides of the base bracket 12.

[0044] Furthermore, as shown in Figures 3 and 4, both ends of the connecting rod 600 are fixed to the locking members 102 of both operating assemblies 100, respectively. When the locking member 102 on one side of the base bracket 12 is rotated, the connecting action of the connecting rod 600 allows the locking member 102 on the other side of the base bracket 12 to rotate simultaneously, thereby allowing the extension lengths of the telescopic tubes 30 on both sides of the base bracket 12 to be adjusted simultaneously. Therefore, to adjust the telescopic tubes 30 on both sides, it is only necessary to operate the operating assembly 100 on one side of the base bracket 12, which is easy to operate. Moreover, the function of adjusting the connection of the telescopic tubes 30 on both sides can be achieved by the connecting rod 600, resulting in a simple structure, easy implementation, and low manufacturing costs. In this embodiment, both ends of the connecting rod 600 are connected to the locking members 102 of both operating assemblies 100, respectively. In some embodiments, both ends of the connecting rod 600 may also be fixed to the locking members 102 of both operating assemblies 100, for example, by welding or riveting. The fixing members 111 on both sides of the base bracket 12 are provided with opposing mounting holes (not shown), and both ends of the connecting rod 600 are fixed to the corresponding locking members 102 through the opposing mounting holes.

[0045] The child seat base described above provides the following overall technical benefits.

[0046] In the aforementioned base, the locking member 102 of the operating assembly 100 is connected to the base bracket 12. By operating the locking member 102, it can engage with one of the locking portions 31a on the telescopic tube 30 so that the base bracket 12 is fixed at a specific length position relative to the telescopic tube 30. When it is necessary to adjust the extension length of the telescopic tube 30, it is simply a matter of operating the locking member 102 to disengage from the locking portion 31a so that the telescopic tube 30 and the base bracket 12 can slide relative to each other. After the telescopic tube 30 has slid to the desired position relative to the base bracket 12, the locking member 102 can operate to cooperate with another locking portion 31a on the telescopic tube 30, thereby achieving relative position adjustment between the base bracket 12 and the telescopic tube 30, i.e., adjustment of the extension length of the telescopic tube 30.

[0047] The technical features of the embodiments described above can be combined in any way. For the sake of simplicity, not all possible combinations of the technical features of the embodiments described above are described. However, all such combinations of technical features should be considered to be within the scope of this disclosure, provided they do not create a contradiction.

[0048] The aforementioned examples are merely illustrative of some embodiments of the Disclosure, and while their descriptions are specific and detailed, they should not be construed as limiting the scope of the Disclosure. It should be noted that multiple variations and modifications may be made by those skilled in the art without departing from the scope of the Disclosure, all of which remain within the scope of the Disclosure's protection. Therefore, the scope of the Disclosure's protection shall be defined by the appended claims.

Claims

1. A child seat base comprising a base bracket, an operating assembly, and a telescopic tube, wherein the operating assembly includes a locking member connected to the base bracket, the telescopic tube is provided with a plurality of locking portions along its length, the locking member is operable to engage with one of the locking portions so that the telescopic tube and the base bracket are locked together, and the locking member is operable to disengage from one of the locking portions so that the telescopic tube and the base bracket can slide against each other. The operating assembly further comprises an operating member that can be operated to drive the locking member to engage with or disengage from the locking portion, The base further comprises a first elastic member, the two ends of which abut the operating member and the base bracket, respectively. A base for a child seat, wherein the operating member has an operating inclined surface, the operating member has a first position and a second position, when the operating member is in the first position the operating inclined surface abuts against the locking member and the operating member is rotatable to rotate the locking member, and when the operating member is in the second position the operating inclined surface and the locking member are separated from each other.

2. The base according to claim 1, wherein the locking member is rotatably connected to the base bracket, the locking member is rotatable to engage with one of the locking portions so that the telescopic tube and the base bracket are locked together, and the locking member is rotatable to disengage from one of the locking portions so that the telescopic tube and the base bracket can slide against each other.

3. The base according to claim 1 or 2, wherein the locking member is provided with a male connecting portion, and the locking portion is a female connecting portion that can engage with the male connecting portion.

4. The base according to claim 1, wherein the locking member is provided with an engaging projection, and the locking portion is an engaging hole capable of cooperating with the engaging projection.

5. The base according to claim 4, wherein the engaging projection has a first side surface and a second side surface arranged along the extending direction of the expansion joint, and the first side surface is an engaging inclined surface inclined toward the second side surface.

6. The base according to claim 1, wherein the operating member comprises an operating body, an operating pillar, and a limiting hook, both of which protrude from the side of the operating body, the operating inclined surface of the operating member is positioned at the end of the operating pillar away from the operating body, the base bracket is provided with a housing groove configured to accommodate the operating member, a limiting projection is formed on the groove wall of the housing groove, and when the operating member is installed in the housing groove, the limiting hook can engage with the limiting projection to restrict the movement of the operating member toward the opening of the housing groove, the two ends of the first elastic member abut against the operating body and the bottom of the housing groove, respectively, the bottom of the housing groove has a through hole, and the operating pillar can pass through the through hole and abut against the locking member.

7. The base according to claim 1, wherein the locking member comprises a first locking piece and a second locking piece connected to each other and positioned at a specific angle, the first locking piece being provided along the extending direction of the expansion joint, the second locking piece being operable to allow the first locking piece to engage with the locking portion, and the second locking piece being operable to allow the first locking piece to disengage from the locking portion.

8. The base according to claim 1, further comprising a second elastic member having two ends connected to the base bracket and the locking member, respectively, wherein the second elastic member always allows the locking member to move toward the locking portion and cooperate with the locking portion.

9. The base according to claim 8, further comprising a fixing member fixed to the side surface of the base bracket, wherein the two ends of the second elastic member are connected to the fixing member and the locking member, respectively, and the locking member is rotatably connected to the fixing member.

10. The base according to claim 1, further comprising a guide cylinder fixed to the side surface of the base bracket, wherein the guide cylinder is positioned outside the telescopic tube, and the telescopic tube is slidable relative to the guide cylinder.

11. The base according to claim 1, further comprising a connecting rod, wherein the operating assembly is provided on each of the two sides of the base bracket, and each of the two ends of the connecting rod is fixed to a corresponding locking member of the operating assembly.

12. The base bracket comprises a first support frame, a second support frame, and a synchronization member, wherein the first support frame and the second support frame are spaced apart from each other, and the two ends of the synchronization member are fixed to the first support frame and the second support frame, respectively, and the operating assembly comprises two operating assemblies, each of which is positioned on the side of the first support frame and the side of the second support frame away from the synchronization member, according to claim 1.

13. A base for a child seat, the base comprising a base bracket, an operating assembly, and a telescopic tube, wherein the operating assembly comprises a locking member connected to the base bracket, the telescopic tube is provided with a plurality of locking portions along its length, the locking member is operable to engage with one of the locking portions so that the telescopic tube and the base bracket are locked together, and the locking member is operable to disengage from one of the locking portions so that the telescopic tube and the base bracket can slide against each other. A base for a child seat, further comprising a second elastic member having two ends connected to the base bracket and the locking member, respectively, wherein the second elastic member always moves toward the locking portion and cooperates with the locking portion.

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