A base mechanism and child safety seat

Abstract

The application discloses a base mechanism and a child safety seat, wherein the base mechanism comprises a base, a connecting mechanism, a linkage mechanism, a supporting mechanism and an adjusting mechanism. Two locking rods in the linkage mechanism are connected through a synchronous assembly. A user only needs to operate an unlocking button on one side to realize unlocking and adjusting of the connecting mechanisms on both sides, and it is not necessary to maintain the unlocking state of the connecting mechanisms on both sides of the base by both hands and then adjust the position of the base. The position adjusting operation of the connector is relatively simple. When the height of the supporting mechanism is increased, it is not necessary to move an adjusting button, and the first pipe can be directly pulled to the required height. The first pipe can only be extended under the action of an external force applied by the user, so that the height after adjustment is not easy to exceed the required height. The height adjusting operation of the supporting mechanism is relatively simple, and therefore the adjusting operation of the base mechanism is relatively simple.

Description

Technical Field

[0001] This application relates to the field of automotive safety seat technology, and in particular to a base mechanism and a child safety seat. Background Technology

[0002] A child safety seat is a seat installed in a car to effectively improve the safety of children while traveling. The base mechanism of a child safety seat needs to include a height-adjustable support mechanism and a fore-aft adjustable connecting mechanism to ensure that the child safety seat can be stably fixed in a comfortable position on car seats of various heights and widths. The support mechanism can be a telescopic rod mechanism; the connecting mechanism can use ISOFIX connectors. An ISOFIX connector is a U-shaped hook mechanism that is fixed at both ends to a flat sheet metal component. Typically, two ISOFIX connectors are provided, one on each side of the base.

[0003] In related technologies, installing a child safety seat requires raising the support mechanism to ensure its end is stably in contact with the ground. The user needs to unlock the support mechanism, allowing the movable tubes within it to fall naturally under gravity, bringing the end of the support mechanism to the ground. Locking the support mechanism then provides stable support. However, since the child safety seat is not yet fixed in the desired position during installation, the automatic fall of the movable tubes under gravity may result in the support mechanism being higher than needed, requiring further adjustments to lower it to the appropriate height, making the process complex. Adjusting the connecting mechanism requires the user to simultaneously keep both connecting mechanisms on both sides of the base unlocked while adjusting the base position. In summary, the adjustment operation of child safety seats in these technologies is inconvenient. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a base mechanism whose height adjustment operation of the support mechanism and the position adjustment operation of the connector are both relatively simple.

[0005] This application also proposes a child safety seat that includes the aforementioned base mechanism.

[0006] The base mechanism provided in the first aspect embodiment of this application includes:

[0007] The base includes a housing and a mounting bracket, the mounting bracket being housed inside the housing;

[0008] A connecting mechanism includes a connector and a sliding rod. The sliding rod is slidably connected to the housing along a first direction and is at least partially housed inside the housing. The connector is connected to the end of the sliding rod that protrudes outside the housing. The sliding rod has a plurality of first locking holes arranged along the first direction. The distance between adjacent first locking holes is 3.5 mm to 4.5 mm. Two connecting mechanisms are provided, and the two connecting mechanisms are respectively located on both sides of the housing.

[0009] The linkage mechanism includes a connecting rod, a synchronization component, two unlocking buttons, and two locking rods. The two ends of the connecting rod are respectively connected to the two sliding rods. The two locking rods are slidably connected to the mounting bracket along a second direction, which intersects with the first direction. The two sides of the synchronization component are respectively connected to the two locking rods. The two unlocking buttons are respectively connected to the two locking rods, and the two unlocking buttons are exposed from the two sides of the housing. The synchronization component is used to drive the other locking rod to move when any one of the locking rods moves, so that the two locking rods synchronously and correspondingly extend into or retract from the first locking holes of the two sliding rods.

[0010] The support mechanism includes a first tube and a second tube. The first tube has a sliding end and an operating end at its two ends, respectively. The sliding end is housed inside the second tube, and the operating end protrudes to the outside of the second tube. The first tube can slide relative to the second tube in a third direction. The second tube has a plurality of second locking holes arranged in a third direction. The second tube is connected to the housing.

[0011] The adjustment mechanism includes a locking block, an adjustment button, and an adjustment rod. The locking block is connected to the sliding end and can slide relative to the first pipe in a fourth direction, which intersects with the third direction. The locking block has a pushing surface located on the side of the locking block away from the second pipe in the third direction. The pushing surface has an angle with both the third and fourth directions. The adjustment button is located at the operating end and can move relative to the first pipe. The adjustment rod is accommodated inside the first pipe. Moving the adjustment button can drive the adjustment rod to move along the third direction, causing the adjustment rod to drive the locking block to move along the fourth direction, so that the locking block extends into or exits the second locking hole.

[0012] The base mechanism provided in the first aspect embodiment of this application has at least the following beneficial effects:

[0013] In the base mechanism provided in this application embodiment, the position of the connector is adjusted by the coordinated action of the linkage mechanism and the sliding rod. The two locking rods in the linkage mechanism are connected by a synchronization component. When the user moves the unlock button on either side, causing the connected locking rod to move and exit the first locking hole, the synchronization component simultaneously causes the locking rod on the other side to move and exit the first locking hole, so that the two connecting mechanisms are unlocked synchronously. The two sliding rods are connected by a connecting rod, so that they can move synchronously relative to the base. After the relative position of the base and the two connecting mechanisms is adjusted to the correct position, the user releases the unlock button, causing the connected locking rod to move and extend into another first locking hole. The synchronization mechanism simultaneously causes the locking rod on the other side to move and extend into another first locking hole, so that the two connecting mechanisms are locked synchronously. The user only needs to operate the unlock button on one side to unlock and adjust the connecting mechanisms on both sides. There is no need to maintain the unlocked state of the connecting mechanisms on both sides of the base with both hands at the same time, and then adjust the position of the base. The position adjustment operation of the connector is relatively simple. Setting the distance between adjacent first locking holes to 3.5mm to 4.5mm can ensure a clear adjustment feel between adjacent adjustment positions and improve the convenience of adjusting the position of the connector 210 of the child safety seat.

[0014] The height of the support mechanism is adjusted by the coordinated action of the adjustment mechanism and the support mechanism. When the height of the support mechanism needs to be increased, the first tube is pulled directly in a third direction. The inner wall of the second locking hole abuts against the pushing surface and pushes the locking block to move in a fourth direction, causing the locking block to disengage from the second locking hole. This allows the first tube to slide relative to the second tube, thereby increasing the height of the support mechanism. The adjustment button is located at the operating end of the first tube, while the locking block is located at the sliding end of the first tube. When the height of the support mechanism needs to be lowered for subsequent retraction, the user moves the adjustment button located at the operating end of the first tube. The adjustment lever transmits the user's driving force to the adjustment button to the locking block, causing the locking block to disengage from the second locking hole. This allows the first tube to slide relative to the second tube, lowering the support mechanism to the required height. Afterwards, the user releases the adjustment button, and the adjustment lever drives the locking block to extend into another second locking hole, fixing the relative positions of the first and second tubes. During the adjustment process, firstly, when raising the height of the support mechanism, there is no need to move the adjustment button; simply pull the first tube to the desired height. The first tube can only extend under the action of external force applied by the user, thus preventing the adjusted height from exceeding the desired height. When lowering the height of the support mechanism, the adjustment button is located at the operating end of the first tube, which is also the position where force is applied when adjusting the height of the support foot. The user operates the adjustment button with one hand and pushes the first tube in a third direction until the support mechanism is lowered to the desired height. Then, releasing the adjustment button completes the height adjustment of the support mechanism. The height adjustment operation of the support mechanism is relatively simple. In summary, the adjustment operation of the base mechanism provided in this application embodiment is relatively simple.

[0015] In some embodiments of this application, the synchronization component includes two first links and two second links. The length of the second links is less than the length of the first links. The two first links are hinged to the positions between the two ends of the first links, and the two second links are hinged to each other. The two second links are hinged to the positions between the two ends of the two first links in a one-to-one correspondence, so that the two first links and the two second links form a rhombic structure. Each first link is connected to a locking rod and can rotate relative to the locking rod.

[0016] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0017] When the user moves the unlock button on either side, causing the connected locking rod to move towards exiting the first locking hole, the first link connected to that locking rod is pushed, causing the first link and the second link hinged to it to open. This, in turn, causes another first link and another second link to open, causing the other first link to be pulled, and causing the other locking rod to move synchronously towards exiting the first locking hole. Conversely, under the action of the two first links and two second links arranged in a diamond shape, when the user moves the unlock button on either side, causing the connected locking rod to move towards entering the first locking hole, the other locking rod can move synchronously towards entering the first locking hole. The synchronous assembly formed by the two first links and two second links arranged in a diamond shape is reliable in operation, simple in structure, and easy to install. Compared to the second link being hinged to the end of the first link, hinged to the position between the two ends of the first link, the size of the synchronous assembly can be reduced, reducing the space occupied by the synchronous assembly, which is conducive to the internal structural layout of the housing.

[0018] In some embodiments of this application, the linkage mechanism further includes two sliding members and two push rods. Each sliding member includes a sliding portion and a mounting portion connected to each other. The sliding portion is slidably connected to the mounting frame along the second direction. The mounting portion of each sliding member is correspondingly connected to a locking rod. Each sliding member is correspondingly rotatably connected to a first connecting rod. Each push rod is correspondingly connected at one end to an unlocking button and at the other end to a sliding member. Both push rods are accommodated inside the mounting frame.

[0019] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0020] The sliding component, as a part connecting the locking lever, the first link, and the mounting bracket, provides sufficient installation space for the connection between the locking lever, the first link, and the mounting bracket, which helps to reduce the difficulty of structural layout and improve the rationality of the structural design of the base mechanism; the mounting bracket can guide the push rod and improve the stability of the adjustment action; it can also save space inside the housing and improve the rationality of the structural layout of the child safety seat.

[0021] In some embodiments of this application, the mounting part has a mounting hole, the locking rod includes a plug-in part and a locking part connected in sequence, a first limiting surface is provided between the plug-in part and the locking part, the plug-in part is inserted into the mounting hole, the first limiting surface abuts against the mounting part, and the locking part can extend into or out of the first locking hole of the sliding rod.

[0022] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0023] The locking rod and the mounting part of the sliding part are connected to each other by plugging. The locking rod is provided with a first limiting surface to limit the plugging position of the locking rod. The installation is simple and has high installation accuracy.

[0024] In some embodiments of this application, the locking rod further includes a limiting part, the limiting part being connected to one end of the insertion part away from the locking part, and a second limiting surface being provided between the limiting part and the insertion part, the second limiting surface abutting against the mounting part, the second limiting surface and the first limiting surface being located at opposite ends of the mounting hole;

[0025] And / or,

[0026] The length of the connector is 20.5 mm to 21.1 mm.

[0027] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0028] The second limiting surface and the first limiting surface are located at the two ends of the mounting hole, respectively. The two ends of the insertion part limit the insertion part so that the insertion part can be stably inserted into the mounting hole, thereby improving the structural stability of the child safety seat. The length of the insertion part is set to 20.5mm to 21.1mm, which can provide sufficient mating length between the insertion part and the mounting part, ensuring the stability of the connection, and reducing the processing difficulty of the locking rod.

[0029] In some embodiments of this application, the linkage mechanism further includes a first elastic element, which is clamped between the two sliding elements. When both locking rods are disengaged from the first locking hole, the first elastic element is compressed.

[0030] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0031] When the user releases the unlock button, the external force acting on the slider disappears, and the first elastic element pushes the two sliders away from each other under its own elastic force, so that the two locking rods can be inserted into the first locking holes of the two sliders respectively without additional operation; during use, the first elastic element can maintain the state of the two locking rods inserted into the first locking holes, ensuring the stability of the base position.

[0032] In some embodiments of this application, the mounting part further has a mounting groove, and the two ends of the first elastic member are respectively accommodated in the mounting grooves of the two mounting parts. The depth of the mounting groove is D. When both locking rods extend into the first locking hole, the length of the first elastic member is L, 1 / 5L≤D≤1 / 3L.

[0033] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0034] The inner wall of the mounting groove can limit the two ends of the first elastic element to prevent it from falling off and improve the structural stability of the base mechanism; setting 1 / 5L≤D≤1 / 3L can ensure the stability of the first elastic element installation and ensure that the first elastic element has sufficient deformation space to ensure that the locking rod can smoothly extend into and exit the first locking hole.

[0035] In some embodiments of this application, the end of the locking rod that extends into the first locking hole has a guide slope, the guide slope being located on one side of the locking rod in the first direction, and the angle between the guide slope and the extension direction of the locking rod being 40 degrees to 50 degrees.

[0036] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0037] When there is a slight deviation between the position of the locking rod and the first locking hole into which it is about to be inserted, the locking rod moves towards the first locking hole. The guide ramp contacts the edge of the first locking hole, and the locking rod continues to move. Under the push of the guide ramp, the sliding rod moves along the first direction until the first locking hole and the locking rod are aligned, and the locking rod smoothly inserts into the first locking hole. The guide ramp can correct the position of the sliding rod within a certain range, preventing the connecting mechanism from failing to lock due to misalignment between the first locking hole and the locking rod, thus ensuring smooth locking and improving the convenience of adjusting the connector position of the child safety seat. Setting the angle between the guide ramp and the extension direction of the locking rod to 40 to 50 degrees avoids both excessively large angles that would cause uneven guiding action and excessively small angles that would result in a narrow correction range, thus achieving a better guiding effect.

[0038] In some embodiments of this application, the support mechanism further includes a support block connected to the sliding end. The support block has a guide groove, and the locking block is accommodated in the guide groove and can slide relative to the support block along the fourth direction. The locking block has a protrusion, and the adjusting rod has an adjusting groove. The extending direction of the adjusting groove has an angle with both the third direction and the fourth direction. The protrusion is accommodated in the adjusting groove, and one end of the adjusting groove is further away from the inner wall of the first pipe than the other end.

[0039] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0040] When the adjusting rod moves away from the second pipe in the third direction, the locking block can move inward into the first pipe in the fourth direction to disengage from the second locking hole; when the adjusting rod moves towards the second pipe in the third direction, the locking block can move outward from the first pipe in the fourth direction and extend outward to the second locking hole. The above structure can transmit the driving force of the user on the adjusting button at the operating end to the locking block located at the sliding end. The structure is relatively simple and the action is stable.

[0041] In some embodiments of this application, the adjusting rod has a sliding cavity extending along the third direction, the support block is at least partially accommodated in the sliding cavity, and the adjusting mechanism further includes a second elastic member extending along the third direction. The two ends of the second elastic member abut against the inner walls of the support block and the sliding cavity, respectively. When the locking block exits the second locking hole, the second elastic member is compressed.

[0042] And / or,

[0043] The support block has a limiting flange that abuts against the end face of the first pipe in the third direction and contacts the inner wall of the second pipe in the circumferential direction. The limiting flange is connected to a plurality of reinforcing bosses that protrude away from the first pipe relative to the limiting flange. The plurality of reinforcing bosses are distributed on the edge of the limiting flange.

[0044] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0045] When the user moves the adjustment button to disengage the locking block from the second locking hole, the second elastic element is compressed. When the user releases the adjustment button, the adjustment rod returns to its original position under the elastic force of the second elastic element, causing the locking block to extend into the second locking hole. During use, the second elastic element can maintain the locking block inserted into the second locking hole, ensuring the stability of the support mechanism's height 400. Multiple reinforcing bosses can reinforce multiple locations on the edge of the limiting protrusion, reducing the possibility of the limiting protrusion breaking when the support mechanism is impacted, and improving the structural stability of the support mechanism.

[0046] In some embodiments of this application, the adjusting rod has a first pushing slope, the extension direction of the first pushing slope has an angle with both the third direction and the fourth direction, the adjusting button has a second pushing slope, the second pushing slope is in contact with the first pushing slope, and the adjustment button moving along the fourth direction can drive the adjusting rod to move along the third direction;

[0047] And / or,

[0048] The support mechanism further includes a support foot, which is connected to the end of the first pipe protruding outside the second pipe. The width of the support foot is greater than the width of the first pipe. The adjustment button is connected to the support foot and protrudes from the side of the support foot.

[0049] The base mechanism provided in this application embodiment has at least the following beneficial effects:

[0050] The cooperation of the first and second pushing inclined surfaces allows the movement of the adjustment button in the fourth direction to be converted into the movement of the adjustment lever in the third direction. When adjusting the height of the support mechanism, the user can pinch the side of the operating end of the first tube and press the adjustment button, and then continue to pinch the operating end and pull the first tube to extend or retract, which makes it easier for the user to apply force and improves the convenience of height adjustment of the support mechanism. Setting a support foot with a width greater than that of the first tube helps to improve the stability of the support mechanism in supporting the base body.

[0051] The child safety seat provided in the second aspect of this application includes: a base mechanism provided in any embodiment of the first aspect of this application; and a seat body, which is mounted on the housing.

[0052] The child safety seat provided in the second aspect of this application has at least the following beneficial effects:

[0053] The child safety seat provided in the second aspect of this application adopts the base mechanism provided in the first aspect of this application. In the base mechanism, the position of the connector is adjusted by the coordinated action of the linkage mechanism and the sliding rod. The two locking rods in the linkage mechanism are connected by a synchronization component. When the user moves the unlock button on either side to move the locking rod connected to it and exit the first locking hole, the synchronization component simultaneously moves the locking rod on the other side to move and exit the first locking hole, so that the two connecting mechanisms are unlocked synchronously. The two sliding rods are connected by a connecting rod, so that they can move synchronously relative to the base. After the relative position of the base and the two connecting mechanisms is adjusted to the correct position, the user releases the unlock button to move the locking rod connected to it and insert it into another first locking hole. The synchronization mechanism simultaneously moves the locking rod on the other side to move and insert it into another first locking hole, so that the two connecting mechanisms are locked synchronously. The user only needs to operate the unlock button on one side to unlock and adjust the connecting mechanisms on both sides. There is no need to keep both hands on both sides of the base in the unlocked state and then adjust the position of the base. The position adjustment operation of the connector is relatively simple.

[0054] The height of the support mechanism is adjusted by the coordinated action of the adjustment mechanism and the support mechanism. When the height of the support mechanism needs to be increased, the first tube is pulled directly in a third direction. The inner wall of the second locking hole abuts against the pushing surface and pushes the locking block to move in a fourth direction, causing the locking block to disengage from the second locking hole. This allows the first tube to slide relative to the second tube, thereby increasing the height of the support mechanism. The adjustment button is located at the operating end of the first tube, while the locking block is located at the sliding end of the first tube. When the height of the support mechanism needs to be lowered for subsequent retraction, the user moves the adjustment button located at the operating end of the first tube. The adjustment lever transmits the user's driving force to the adjustment button to the locking block, causing the locking block to disengage from the second locking hole. This allows the first tube to slide relative to the second tube, lowering the support mechanism to the required height. Afterwards, the user releases the adjustment button, and the adjustment lever drives the locking block to extend into another second locking hole, fixing the relative positions of the first and second tubes. During the adjustment process, firstly, when raising the height of the support mechanism, there is no need to move the adjustment button; simply pull the first tube to the desired height. The first tube can only extend under the action of external force applied by the user, thus preventing the adjusted height from exceeding the desired height. When lowering the height of the support mechanism, the adjustment button is located at the operating end of the first tube, which is also the position where force is applied when adjusting the height of the support leg. The user operates the adjustment button with one hand and pushes the first tube in a third direction until the support mechanism is lowered to the desired height. Then, releasing the adjustment button completes the height adjustment of the support mechanism. The height adjustment operation of the support mechanism is relatively simple. In summary, the adjustment operation of the base mechanism provided in the first aspect embodiment of this application is relatively simple. Therefore, the adjustment operation of the child safety seat using the base mechanism provided in the first aspect embodiment of this application is relatively simple.

[0055] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0056] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0057] Figure 1 A perspective view of a child safety seat provided for some embodiments of the second aspect of this application;

[0058] Figure 2 for Figure 1 A three-dimensional schematic diagram of the base body and connecting mechanism of the child safety seat base mechanism shown;

[0059] Figure 3 for Figure 1 A three-dimensional schematic diagram of the mounting bracket, connecting mechanism, and linkage mechanism of the base mechanism of the child safety seat shown;

[0060] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0061] Figure 5 for Figure 3 The cross-sectional view shown is of the linkage mechanism inside the base body in a locked state.

[0062] Figure 6 for Figure 3 The cross-sectional view shown is of the linkage mechanism inside the base body in the unlocked state.

[0063] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0064] Figure 8 for Figure 3 A top view of the locking lever of the linkage mechanism in the middle;

[0065] Figure 9 for Figure 3 Side view of the sliding rod of the connecting mechanism in the middle;

[0066] Figure 10 for Figure 1 A three-dimensional schematic diagram of the support mechanism and adjustment mechanism of the base of the child safety seat shown.

[0067] Figure 11 for Figure 10 A schematic diagram showing the cooperation between the first pipe fitting, the support base, and the adjustment mechanism in the support and adjustment mechanisms shown;

[0068] Figure 12 for Figure 11 A cross-sectional view of the first pipe fitting, supporting foot, and adjusting mechanism in the locked state;

[0069] Figure 13 for Figure 11 A cross-sectional view of the first pipe fitting, supporting foot, and adjusting mechanism in the unlocked state;

[0070] Figure 14 for Figure 10 A three-dimensional schematic diagram of the support block in the support mechanism shown;

[0071] Figure 15 for Figure 10 A three-dimensional schematic diagram of the adjusting rod in the adjusting mechanism shown.

[0072] Figure label:

[0073] The components include: base body 100, housing 110, mounting bracket 120, connecting mechanism 200, connector 210, sliding rod 220, first locking hole 221, linkage mechanism 300, connecting rod 310, synchronization component 320, first connecting rod 321, second connecting rod 322, unlocking button 330, locking rod 340, insertion part 341, locking part 342, first limiting surface 343, limiting part 344, second limiting surface 345, guide slope 346, guide slope 347, sliding member 350, sliding part 351, mounting part 352, mounting hole 353, mounting groove 354, limiting boss 355, and first spring. Component 360, push rod 370, support mechanism 400, first tube 410, sliding end 411, operating end 412, second tube 420, second locking hole 421, support block 430, guide groove 431, limiting protrusion 432, reinforcing boss 433, support foot 440, limiting component 450, adjustment mechanism 500, locking block 510, protrusion 511, push surface 512, adjustment button 520, second push slope 521, adjustment rod 530, adjustment groove 531, sliding cavity 532, first push slope 533, limiting groove 534, second elastic component 540, seat body 600. Detailed Implementation

[0074] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0075] In the description of this application, it should be understood that the orientation descriptions, such as up, down, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0076] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0077] In the description of this application, the reference to terms such as "one embodiment," "some embodiments," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] A child safety seat is a seat installed in a car to effectively improve the safety of children while traveling. The base mechanism of a child safety seat must include a height-adjustable support mechanism 400 and a fore-and-aft adjustable connecting mechanism 200, so that the child safety seat can be stably fixed in a comfortable position on car seats of various heights and widths. The support mechanism 400 can be a telescopic rod mechanism; the connecting mechanism 200 can be an ISOFIX interface. An ISOFIX interface is a U-shaped hook mechanism whose two ends are fixed to a flat sheet metal component. Typically, two ISOFIX interfaces are provided, one on each side of the base.

[0079] In related technologies, installing a child safety seat requires raising the support mechanism 400 to ensure its end is stably in contact with the ground. The user needs to unlock the support mechanism, allowing the movable tubes within it to fall naturally under gravity, bringing the end of the support mechanism to the ground. Locking the support mechanism then provides stable support. However, since the child safety seat is not yet fixed in the desired position during installation, the automatic fall of the movable tubes under gravity may cause the support mechanism to be higher than the required height, necessitating further adjustments to lower it to the appropriate height, making the process complex. Adjusting the position of the connecting mechanism 200 requires the user to simultaneously keep both connecting mechanisms 200 on both sides of the base body 100 unlocked before adjusting the base body 100. In summary, the adjustment operation of child safety seats in these related technologies is inconvenient.

[0080] Based on this, refer to Figures 1 to 15 The base mechanism provided in the first aspect embodiment of this application includes a base body 100, a connecting mechanism 200, a linkage mechanism 300, a support mechanism 400, and an adjustment mechanism 500.

[0081] Reference Figures 2 to 6 The base body 100 includes a housing 110 and a mounting bracket 120, with the mounting bracket 120 housed inside the housing 110;

[0082] Reference Figures 2 to 3 The connecting mechanism 200 includes a connector 210 and a sliding rod 220. The sliding rod 220 is slidably connected to the housing 110 along a first direction and is at least partially housed inside the housing 110. The connector 210 is connected to the end of the sliding rod 220 that protrudes outside the housing 110. (Refer to...) Figure 9 The sliding rod 220 has multiple first locking holes 221 arranged along the first direction, and two connecting mechanisms 200 are provided, which are respectively located on both sides of the housing 110.

[0083] Reference Figures 3 to 7 The linkage mechanism 300 includes a connecting rod 310, a synchronization component 320, two unlocking buttons 330, and two locking rods 340. The two ends of the connecting rod 310 are respectively connected to two sliding rods 220. The two locking rods 340 are slidably connected to the mounting bracket 120 along a second direction, which intersects with the first direction. The two sides of the synchronization component 320 are respectively connected to the two locking rods 340. The two unlocking buttons 330 are respectively connected to the two locking rods 340, and the two unlocking buttons 330 are exposed from the two sides of the housing 110. The synchronization component 320 is used to drive the other locking rod 340 to move when any one locking rod 340 moves, so that the two locking rods 340 synchronously and one-to-one correspondence extend into or exit the first locking hole 221 of the two sliding rods 220.

[0084] Reference Figure 10 The support mechanism 400 includes a first tube 410 and a second tube 420. The two ends of the first tube 410 are a sliding end 411 and an operating end 412, respectively. The sliding end 411 is housed inside the second tube 420, and the operating end 412 protrudes to the outside of the second tube 420. The first tube 410 can slide relative to the second tube 420 in a third direction. The second tube 420 has a plurality of second locking holes 421 arranged in a third direction. The second tube 420 is connected to the housing 110.

[0085] Reference Figures 11 to 15The adjustment mechanism 500 includes a locking block 510, an adjustment button 520, and an adjustment lever 530. The locking block 510 is connected to the sliding end 411 and can slide relative to the first tube 410 in a fourth direction. The fourth direction intersects with the third direction. The locking block 510 has a pushing surface 512, which is located on the side of the locking block 510 away from the second tube 420 in the third direction. The pushing surface 512 has an angle with both the third and fourth directions. The adjustment button 520 is located at the operating end 412 and can move relative to the first tube 410. The adjustment lever 530 is accommodated inside the first tube 410. The movement of the adjustment button 520 can drive the adjustment lever 530 to move in the third direction, so that the adjustment lever 530 drives the locking block 510 to move in the fourth direction, so that the locking block 510 extends into or exits the second locking hole 421.

[0086] Reference Figure 5 and Figure 6 In the base mechanism provided in the first aspect embodiment of this application, the position of the connector 210 is adjusted by the coordinated action of the linkage mechanism 300 and the sliding rod 220. The two locking rods 340 in the linkage mechanism 300 are connected by a synchronization component 320. When the user moves the unlock button 330 on either side, it moves the locking rod 340 connected to it and exits the first locking hole 221. At the same time, the synchronization component 320 moves the locking rod 340 on the other side and exits the first locking hole 221, so that the two connecting mechanisms 200 are unlocked synchronously. The two sliding rods 220 are connected by a connecting rod 310, so that they can move synchronously in the first direction relative to the base body 100. After the relative position of the base body 100 and the two connecting mechanisms 200 are adjusted to the correct position, the user releases the unlock button 330, which moves the locking rod 340 connected to it and inserts it into another first locking hole 221. At the same time, the synchronization mechanism moves the locking rod 340 on the other side and inserts it into another first locking hole 221, so that the two connecting mechanisms 200 are locked synchronously. Users only need to operate the unlock button 330 on one side to unlock and adjust the connection mechanisms 200 on both sides. There is no need to keep the connection mechanisms 200 on both sides of the base body 100 unlocked at the same time, and then adjust the position of the base body 100. The position adjustment operation of the connector 210 is relatively simple.

[0087] Reference Figure 12 and Figure 13The height of the support mechanism 400 is adjusted by the coordinated action of the adjusting mechanism 500 and the support mechanism 400. When it is necessary to increase the height of the support mechanism 400, the first tube 410 is pulled directly in the third direction. The inner wall of the second locking hole 421 abuts against the pushing surface 512 and pushes the locking block 510 to move in the fourth direction, so that the locking block 510 disengages from the second locking hole 421, allowing the first tube 410 to slide relative to the second tube 420, thereby increasing the height of the support mechanism 400. The adjusting button 520 is located at the operating end 412 of the first tube 410, while the locking block 510 is located at the sliding end 411 of the first tube 410. When the support mechanism 400 is lowered to facilitate its subsequent retraction, the user moves the adjustment button 520 located at the operating end 412 of the first tube 410. The adjustment lever 530 transmits the user's driving force on the adjustment button 520 to the locking block 510, causing the locking block 510 to disengage from the second locking hole 421. This allows the first tube 410 to slide relative to the second tube 420. After the support mechanism 400 is lowered to the required height, the user releases the adjustment button 520. The adjustment lever 530 then drives the locking block 510 to extend into another second locking hole 421, fixing the relative positions of the first tube 410 and the second tube 420. During the adjustment process, firstly, when raising the height of the support mechanism 400, there is no need to move the adjustment button 520; simply pull the first tube 410 to the desired height. The first tube 410 can only extend under the action of external force applied by the user, thus it is unlikely that the adjusted height will exceed the desired height. When lowering the height of the support mechanism 400, the adjustment button 520 is located at the operating end 412 of the first tube 410. At the same time, the operating end 412 of the first tube 410 is also the position where force is applied when adjusting the height of the support foot. The user can operate the adjustment button 520 with one hand and push the first tube 410 in a third direction until the support mechanism 400 is lowered to the desired height. Then, release the adjustment button 520 to complete the height adjustment of the support mechanism 400. The height adjustment operation of the support mechanism 400 is relatively simple.

[0088] In summary, the adjustment operation of the base mechanism provided in the first aspect embodiment of this application is relatively simple.

[0089] Furthermore, referring to Figures 3 to 4The synchronization component 320 includes two first links 321 and two second links 322. The two first links 321 are hinged together, and the two second links 322 are hinged together. The two first links 321 and the two second links 322 are hinged one-to-one, so that the two first links 321 and the two second links 322 form a rhomboid structure. Each first link 321 is connected to a locking rod 340 and can rotate relative to the locking rod 340. When the user moves the unlock button 330 on either side, causing the connected locking rod 340 to move in the direction of exiting the first locking hole 221, the first connecting rod 321 connected to the locking rod 340 is pushed, causing the first connecting rod 321 and the second connecting rod 322 hinged to it to open. This, in turn, causes another first connecting rod 321 and another second connecting rod 322 to open, causing the other first connecting rod 321 to be pulled, and causing the other locking rod 340 to move synchronously in the direction of exiting the first locking hole 221. Conversely, under the action of the two first connecting rods 321 and two second connecting rods 322 arranged in a rhombus, when the user moves the unlock button 330 on either side, causing the connected locking rod 340 to move in the direction of extending into the first locking hole 221, the other locking rod 340 can move synchronously in the direction of extending into the first locking hole 221. The synchronous component 320 formed by the two first connecting rods 321 and two second connecting rods 322 arranged in a rhombus has reliable operation, a simple structure, and is easy to install.

[0090] It is understandable that the first link 321 and the second link 322 can be made of metal sheets.

[0091] Furthermore, referring to Figure 4 The length of the second link 322 is less than the length of the first link 321. The second link 322 is hinged between the two ends of the first link 321. Compared to the second link 322 being hinged to the end of the first link 321, the position of hinged second link 322 to the position between the two ends of the first link 321 can reduce the size of the synchronization component 320 and reduce the space occupied by the synchronization component 320, so as to facilitate the internal structural layout of the housing 110.

[0092] Furthermore, referring to Figure 4The linkage mechanism 300 also includes two sliding members 350. Each sliding member 350 includes a sliding portion 351 and a mounting portion 352 connected to each other. The sliding portion 351 is slidably connected to the mounting frame 120 along a second direction. Specifically, a groove can be formed on the mounting frame 120 so that the sliding portion 351 is partially accommodated in the groove, thereby guiding the movement of the sliding portion 351. The mounting portion 352 of each sliding member 350 is correspondingly connected to a locking rod 340, and each sliding member 350 is correspondingly rotatably connected to a first connecting rod 321. As a component connecting the locking rod 340, the first connecting rod 321, and the mounting frame 120, the sliding member 350 provides sufficient installation space for the connection between the locking rod 340, the first connecting rod 321, and the mounting frame 120, which helps to reduce the difficulty of structural layout and improve the rationality of the structural design of the base mechanism.

[0093] Furthermore, referring to Figure 7 and Figure 8 The mounting part 352 has a mounting hole 353. The locking rod 340 includes a plug-in part 341 and a locking part 342 connected in sequence. A first limiting surface 343 is provided between the plug-in part 341 and the locking part 342. The plug-in part 341 is inserted into the mounting hole 353, and the first limiting surface 343 abuts against the mounting part 352. The locking part 342 can extend into or retract from the first locking hole 221 of the sliding rod 220. The locking rod 340 and the mounting part 352 of the sliding member 350 are connected to each other by plugging. The locking rod 340 is provided with a first limiting surface 343 to limit the plugging position of the locking rod 340. The installation is simple and has high installation accuracy.

[0094] To prevent the connector 341 from falling out of the mounting hole 353, in some embodiments, reference is made to... Figure 7 and Figure 8 The locking lever 340 also includes a limiting part 344, which is connected to the end of the insertion part 341 away from the locking part 342. The limiting part 344 and the insertion part 341 have a second limiting surface 345, which abuts against the mounting part 352. The second limiting surface 345 and the first limiting surface 343 are respectively located at both ends of the mounting hole 353. The insertion part 341 is limited at both ends so that the insertion part 341 is stably inserted into the mounting hole 353, thereby improving the structural stability of the base mechanism.

[0095] Furthermore, referring to Figure 7 and Figure 8The mounting part 352 is provided with a limiting boss 355, which is located at one end of the mounting hole 353. The limiting boss 355 is conical and has a conical hole communicating with the mounting hole 353 inside. The limiting part 344 has a conical guide slope 347. During installation, the locking rod 340 is inserted into the mounting hole 353 until the limiting part 344 reaches the conical hole. The locking rod 340 is pushed further, and the guide slope 347 of the limiting part 344 abuts against the inner wall of the conical hole, pushing the limiting boss 355 to deform outward until the limiting part 344 completely reaches the side of the limiting boss 355 away from the mounting hole 353. The limiting boss 355 returns to its original state, and the end of the limiting boss 355 away from the mounting hole 353 abuts against the second limiting surface 345.

[0096] In other embodiments, the plug portion 341 may be provided to be interference-fitted with the mounting hole 353 to ensure the stability of the connection between the plug portion 341 and the mounting portion 352.

[0097] Furthermore, referring to Figure 8 The length l of the plug portion 341 is 20.5mm to 21.1mm, which allows for sufficient mating length between the plug portion 341 and the mounting portion 352, ensuring connection stability and reducing the machining difficulty of the locking rod 340.

[0098] Furthermore, referring to Figures 4 to 6 The linkage mechanism 300 also includes a first elastic element 360, which is clamped between two sliding elements 350, as shown in the figure. Figure 6 When the user pushes the unlock button 330, both locking levers 340 disengage from the first locking hole 221, at which point the first elastic element 360 is compressed; refer to Figure 5 When the user releases the unlock button 330, the external force acting on the slider 350 disappears, and the first elastic element 360 pushes the two sliders 350 away from each other under its own elastic force, so that the two locking rods 340 can be inserted into the first locking holes 221 of the two sliders 220 respectively without additional operation; during use, the first elastic element 360 can maintain the state of the two locking rods 340 inserted into the first locking holes 221, ensuring the stability of the base body 100.

[0099] Furthermore, referring to Figure 7 The mounting section 352 also has a mounting slot 354, see reference. Figure 5 and Figure 6 The two ends of the first elastic member 360 are respectively accommodated in the mounting grooves 354 of the two mounting parts 352. The inner wall of the mounting groove 354 can limit the two ends of the first elastic member 360 to prevent the first elastic member 360 from falling off and improve the structural stability of the base mechanism.

[0100] Furthermore, referring to Figure 7 The depth of the mounting groove 354 is D. When both locking rods 340 are inserted into the first locking hole 221, the length of the first elastic member 360 is L, 1 / 5L≤D≤1 / 3L. This ensures both the stability of the first elastic member 360 during installation and sufficient deformation space for the first elastic member 360 to smoothly extend into and retract from the first locking hole 221.

[0101] Furthermore, referring to Figure 8 The locking rod 340 has a guide slope 346 at one end for inserting into the first locking hole 221. The guide slope 346 is located on one side of the locking rod 340 in the first direction. When there is a certain deviation between the position of the locking rod 340 and the position of the first locking hole 221 into which the locking rod 340 is about to be inserted, the locking rod 340 moves towards the first locking hole 221. The guide slope 346 contacts the edge of the first locking hole 221, and the locking rod 340 continues to move. Under the push of the guide slope 346, the sliding rod 220 moves along the first direction until the first locking hole 221 is aligned with the locking rod 340, and the locking rod 340 smoothly inserts into the first locking hole 221. The guide slope 346 can correct the position of the sliding rod 220 within a certain range, preventing the connecting mechanism 200 from failing to lock due to misalignment between the position of the first locking hole 221 and the position of the locking rod 340, thus ensuring smooth locking and improving the convenience of adjusting the position of the connector 210 of the base mechanism.

[0102] Furthermore, referring to Figure 8 The angle R between the guide ramp 346 and the extension direction of the locking rod 340 is 40 to 50 degrees. This can avoid the guide action being too unsmooth due to an excessively large angle R, and also avoid the correctable range being too narrow due to an excessively small angle R, thus achieving a better guiding effect.

[0103] Furthermore, referring to Figure 9 The distance d between adjacent first locking holes 221 is 3.5mm to 4.5mm to ensure a clear adjustment feel between adjacent adjustment positions and improve the convenience of adjusting the position of connector 210 of the base mechanism.

[0104] Furthermore, referring to Figure 9 The first locking hole 221 has at least one straight edge, as shown in the reference. Figure 8The locking part 342 has at least one plane in the circumferential direction, and when the locking part 342 extends into the first locking hole 221, the plane fits against the straight edge to prevent the locking rod 340 from rotating in the first locking hole 221, thereby reducing the abnormal noise caused by the locking rod 340 hitting the inner wall of the first locking hole 221, and reducing the possibility of the locking rod 340 accidentally disengaging from the first locking hole 221, thus improving the structural stability of the base mechanism in use.

[0105] Furthermore, referring to Figure 5 and Figure 6 The linkage mechanism 300 also includes two push rods 370, each push rod 370 having one end connected to an unlock button 330 and the other end connected to a slider 350. Both push rods 370 are housed inside the mounting bracket 120. The push rods 370 are used to transmit the force exerted by the user on the unlock button 330 to the slider 350, causing the slider 350 to move. By housing the push rods 370 inside the mounting bracket 120, the mounting bracket 120 can guide the push rods 370, improving the stability of the adjustment action; on the other hand, it can save space inside the housing 110, improving the rationality of the structural layout of the base mechanism.

[0106] Furthermore, referring to Figures 11 to 13 The support mechanism 400 also includes a support block 430, which is connected to the sliding end 411, as shown in the figure. Figure 14 The support block 430 has a guide groove 431, and the locking block 510 is accommodated in the guide groove 431 and can slide relative to the support block 430 in the fourth direction. The locking block 510 has a protrusion 511. (Refer to...) Figure 15 The adjusting rod 530 has an adjusting groove 531. The extending direction of the adjusting groove 531 has an angle with both the third and fourth directions. The protrusion 511 is accommodated in the adjusting groove 531. One end of the adjusting groove 531 is further away from the inner wall of the first pipe 410 than the other end.

[0107] Specifically, in some embodiments, reference is made to Figure 15 , Figure 12 and Figure 13 The end of the adjusting groove 531 near the second pipe fitting 420 is further away from the inner wall of the first pipe fitting 410 than the other end. The guide groove 431 limits the locking block 510 to move only relative to the support block 430 in the fourth direction, while the adjusting groove 531, which has angles with both the third and fourth directions, limits the locking block 510 to move only relative to the adjusting rod 530 along the extending direction of the adjusting groove 531. Therefore, referring to... Figure 12 and Figure 13When the adjusting rod 530 moves away from the second pipe 420 in a third direction, the locking block 510 can move inward into the first pipe 410 in a fourth direction to exit the second locking hole 421; when the adjusting rod 530 moves towards the second pipe 420 in a third direction, the locking block 510 can move outward into the first pipe 410 in a fourth direction and extend outward into the second locking hole 421.

[0108] The above structure can transmit the driving force of the user on the adjustment button 520 at the operating end 412 to the locking block 510 located at the sliding end 411. The structure is relatively simple and the action is stable.

[0109] Furthermore, referring to Figures 11 to 13 The adjusting rod 530 has a sliding cavity 532 extending in a third direction. The support block 430 is at least partially accommodated in the sliding cavity 532. The adjusting mechanism 500 also includes a second elastic member 540 extending in a third direction, with both ends of the second elastic member 540 abutting against the inner walls of the support block 430 and the sliding cavity 532, respectively. (Refer to...) Figure 13 When the user moves the adjustment button 520, causing the locking block 510 to disengage from the second locking hole 421, the second elastic element 540 is compressed; see reference. Figure 12 When the user releases the adjustment button 520, the adjustment lever 530 is reset under the elastic force of the second elastic element 540, which drives the locking block 510 to extend into the second locking hole 421. During use, the second elastic element 540 can maintain the locking block 510 inserted into the second locking hole 421, ensuring the stability of the height of the support mechanism 400.

[0110] Furthermore, referring to Figures 11 to 14 The support block 430 has a limiting flange 432, which abuts against the end face of the first pipe fitting 410 in the third direction and contacts the inner wall of the second pipe fitting 420 in the circumferential direction to ensure the stability of the sliding of the first pipe fitting 410 relative to the second pipe fitting 420; the limiting flange 432 is connected to a reinforcing boss 433, which protrudes relative to the limiting flange 432 in a direction away from the first pipe fitting 410. Further, referring to... Figures 11 to 14 The reinforcing boss 433 can be set as a triangle, and the thickness of the reinforcing boss 433 can be set to within 1mm. The reinforcing boss 433 can improve the strength of the limiting protrusion 432, reduce the possibility of the limiting protrusion 432 breaking when the support mechanism 400 is impacted, and improve the structural stability of the support mechanism 400.

[0111] Furthermore, referring to Figure 14Multiple reinforcing protrusions 433 are provided, distributed along the edge of the limiting protrusion 432 to reinforce multiple locations along its edge. It should be noted that the stress on the limiting protrusion 432 can be simulated, and based on the simulation results, reinforcing protrusions 433 can be placed at the locations of maximum stress to specifically reinforce areas of the limiting protrusion 432 prone to breakage.

[0112] Furthermore, referring to Figure 12 , Figure 13 and Figure 15 The adjusting lever 530 has a first pushing inclined surface 533, the extension direction of which forms an angle with both the third and fourth directions. The adjusting button 520 has a second pushing inclined surface 521, which fits against the first pushing inclined surface 533. Moving the adjusting button 520 in the fourth direction can drive the adjusting lever 530 to move in the third direction. The cooperation between the first pushing inclined surface 533 and the second pushing inclined surface 521 allows the movement of the adjusting button 520 in the fourth direction to be converted into the movement of the adjusting lever 530 in the third direction. When adjusting the height of the support mechanism 400, the user can pinch the side of the operating end 412 of the first tube 410 and press the adjusting button 520, and then continue to pinch the operating end 412 and pull the first tube 410 to extend or retract. This facilitates the user's application of force and improves the convenience of adjusting the height of the support mechanism 400.

[0113] Furthermore, referring to Figure 15 The adjusting rod 530 has a limiting groove 534, which extends along a third direction, as shown in the reference. Figures 11 to 13 The first tube 410 is connected to a limiting member 450, which is accommodated in the limiting groove 534. The limiting member 450 cooperates with the limiting groove 534 to limit the travel of the adjusting rod 530 in the third direction, preventing the adjusting rod 530 from coming out of the first tube 410 and improving the structural stability of the base mechanism.

[0114] Furthermore, referring to Figure 1 , Figures 10 to 13 The support mechanism 400 also includes a support foot 440, which is connected to the end of the first tube 410 that protrudes outside the second tube 420. The width of the support foot 440 is greater than the width of the first tube 410. An adjustment button 520 is connected to the support foot 440 and protrudes from the side of the support foot 440. The support foot 440, with a width greater than that of the first tube 410, helps to improve the stability of the support mechanism 400 in supporting the base body 100.

[0115] Reference Figure 1The child safety seat provided in the second aspect of this application includes a seat body 600 and a base mechanism provided in any embodiment of the first aspect of this application, wherein the seat body 600 is mounted on the housing 110.

[0116] The child safety seat provided in the second aspect embodiment of this application adopts the base mechanism provided in the first aspect embodiment of this application, wherein the base mechanism is referenced to... Figure 5 and Figure 6 The position of connector 210 is adjusted by the coordinated action of linkage mechanism 300 and sliding rod 220. The two locking rods 340 in linkage mechanism 300 are connected by synchronization component 320. When the user moves the unlock button 330 on either side, it moves the locking rod 340 connected to it and exits the first locking hole 221. At the same time, synchronization component 320 moves the locking rod 340 on the other side and exits the first locking hole 221, so that the two connecting mechanisms 200 are unlocked synchronously. The two sliding rods 220 are connected by connecting rod 310, so that they can move synchronously in the first direction relative to the base body 100. After the relative position of base body 100 and the two connecting mechanisms 200 are adjusted to the correct position, the user releases the unlock button 330, which moves the locking rod 340 connected to it and inserts it into the other first locking hole 221. At the same time, synchronization mechanism moves the locking rod 340 on the other side and inserts it into the other first locking hole 221, so that the two connecting mechanisms 200 are locked synchronously. Users only need to operate the unlock button 330 on one side to unlock and adjust the connection mechanisms 200 on both sides. There is no need to keep the connection mechanisms 200 on both sides of the base body 100 unlocked at the same time, and then adjust the position of the base body 100. The position adjustment operation of the connector 210 is relatively simple.

[0117] Reference Figure 12 and Figure 13The height of the support mechanism 400 is adjusted by the coordinated action of the adjusting mechanism 500 and the support mechanism 400. When it is necessary to increase the height of the support mechanism 400, the first tube 410 is pulled directly in the third direction. The inner wall of the second locking hole 421 abuts against the pushing surface 512 and pushes the locking block 510 to move in the fourth direction, so that the locking block 510 disengages from the second locking hole 421, allowing the first tube 410 to slide relative to the second tube 420, thereby increasing the height of the support mechanism 400. The adjusting button 520 is located at the operating end 412 of the first tube 410, while the locking block 510 is located at the sliding end 411 of the first tube 410. When the support mechanism 400 is lowered to facilitate its subsequent retraction, the user moves the adjustment button 520 located at the operating end 412 of the first tube 410. The adjustment lever 530 transmits the user's driving force on the adjustment button 520 to the locking block 510, causing the locking block 510 to disengage from the second locking hole 421. This allows the first tube 410 to slide relative to the second tube 420. After the support mechanism 400 is lowered to the required height, the user releases the adjustment button 520. The adjustment lever 530 then drives the locking block 510 to extend into another second locking hole 421, fixing the relative positions of the first tube 410 and the second tube 420. During adjustment, firstly, when raising the height of the support mechanism 400, there is no need to move the adjustment button 520; simply pull the first tube 410 to the desired height. The first tube 410 can only extend under the action of external force applied by the user, thus preventing the adjusted height from exceeding the desired height. When lowering the height of the support mechanism 400, the adjustment button 520 is located at the operating end 412 of the first tube 410. The operating end 412 of the first tube 410 is also the position where force is applied when adjusting the height of the support leg. The user can operate the adjustment button 520 with one hand and push the first tube 410 in a third direction until the support mechanism 400 is lowered to the desired height. Then, release the adjustment button 520 to complete the height adjustment of the support mechanism 400. The other hand can be used to adjust the height of the support mechanism 400, making the height adjustment operation of the support mechanism 400 quite convenient.

[0118] In summary, the adjustment operation of the base mechanism provided in the first aspect embodiment of this application is relatively simple. Therefore, the adjustment operation of the child safety seat using the base mechanism provided in the first aspect embodiment of this application is relatively simple.

[0119] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A base mechanism for use in a child safety seat, characterized in that, The base mechanism includes: The base body includes a housing and a mounting bracket, wherein the mounting bracket is housed inside the housing; A connecting mechanism includes a connector and a sliding rod. The sliding rod is slidably connected to the housing along a first direction and is at least partially housed inside the housing. The connector is connected to the end of the sliding rod that protrudes outside the housing. The sliding rod has a plurality of first locking holes arranged along the first direction. The distance between adjacent first locking holes is 3.5 mm to 4.5 mm. Two connecting mechanisms are provided, and the two connecting mechanisms are respectively located on both sides of the housing. The linkage mechanism includes a connecting rod, a synchronization component, two unlocking buttons, and two locking rods. The two ends of the connecting rod are respectively connected to the two sliding rods. The two locking rods are slidably connected to the mounting bracket along a second direction, which intersects with the first direction. The two sides of the synchronization component are respectively connected to the two locking rods. The two unlocking buttons are respectively connected to the two locking rods, and the two unlocking buttons are exposed from the two sides of the housing. The synchronization component is used to drive the other locking rod to move when any one of the locking rods moves, so that the two locking rods synchronously and correspondingly extend into or retract from the first locking holes of the two sliding rods. The support mechanism includes a first tube and a second tube. The first tube has a sliding end and an operating end at its two ends, respectively. The sliding end is housed inside the second tube, and the operating end protrudes to the outside of the second tube. The first tube can slide relative to the second tube in a third direction. The second tube has a plurality of second locking holes arranged in a third direction. The second tube is connected to the housing. The adjustment mechanism includes a locking block, an adjustment button, and an adjustment rod. The locking block is connected to the sliding end and can slide relative to the first pipe in a fourth direction. The fourth direction intersects with the third direction. The locking block has a pushing surface located on the side of the locking block away from the second pipe in the third direction. The pushing surface has an angle with both the third direction and the fourth direction. The adjustment button is located at the operating end and can move relative to the first pipe. The adjustment rod is accommodated inside the first pipe. The movement of the adjustment button can drive the adjustment rod to move along the third direction, so that the adjustment rod drives the locking block to move along the fourth direction, so that the locking block extends into or exits the second locking hole. The support mechanism further includes a support block, which has a limiting flange. The limiting flange abuts against the end face of the first pipe in the third direction and contacts the inner wall of the second pipe in the circumferential direction. The limiting flange is connected to a plurality of reinforcing bosses, which protrude away from the first pipe relative to the limiting flange. The plurality of reinforcing bosses are distributed on the edge of the limiting flange. The reinforcing boss is configured as a triangular structure, and its thickness is set to within 1 mm.

2. The base mechanism according to claim 1, characterized in that, The synchronization component includes two first links and two second links. The length of the second links is less than the length of the first links. The two first links are hinged together, and the two second links are hinged together. The two second links are hinged one-to-one between the two ends of the two first links, so that the two first links and the two second links form a rhombus structure. Each first link is connected to a locking rod and can rotate relative to the locking rod.

3. The base mechanism according to claim 2, characterized in that, The linkage mechanism further includes two sliding members and two push rods. Each sliding member includes a sliding part and a mounting part connected to each other. The sliding part is slidably connected to the mounting frame along the second direction. The mounting part of each sliding member is correspondingly connected to a locking rod. Each sliding member is rotatably connected to a first connecting rod. Each push rod is correspondingly connected at one end to an unlocking button and at the other end to a sliding member. Both push rods are accommodated inside the mounting frame.

4. The base mechanism according to claim 3, characterized in that, The mounting part has a mounting hole, and the locking rod includes a plug-in part and a locking part connected in sequence. There is a first limiting surface between the plug-in part and the locking part. The plug-in part is inserted into the mounting hole, and the first limiting surface abuts against the mounting part. The locking part can extend into or retract from the first locking hole of the sliding rod.

5. The base mechanism according to claim 4, characterized in that, The locking rod further includes a limiting part, which is connected to the end of the insertion part away from the locking part. The limiting part and the insertion part have a second limiting surface, which abuts against the mounting part. The second limiting surface and the first limiting surface are respectively located at both ends of the mounting hole. And / or, The length of the connector is 20.5 mm to 21.1 mm.

6. The base mechanism according to claim 3, characterized in that, The linkage mechanism also includes a first elastic element, which is clamped between the two sliding elements. When both locking rods are disengaged from the first locking hole, the first elastic element is compressed.

7. The base mechanism according to claim 6, characterized in that, The mounting part also has a mounting groove, and the two ends of the first elastic member are respectively accommodated in the mounting grooves of the two mounting parts. The depth of the mounting groove is D. When both locking rods extend into the first locking hole, the length of the first elastic member is L, 1 / 5L≤D≤1 / 3L.

8. The base mechanism according to claim 1, characterized in that, The locking rod has a guide slope at one end for inserting into the first locking hole. The guide slope is located on one side of the locking rod in the first direction, and the angle between the guide slope and the extension direction of the locking rod is 40 to 50 degrees.

9. The base mechanism according to claim 1, characterized in that, The support block is connected to the sliding end. The support block has a guide groove. The locking block is accommodated in the guide groove and can slide relative to the support block along the fourth direction. The locking block has a protrusion. The adjusting rod has an adjusting groove. The extending direction of the adjusting groove has an angle with both the third direction and the fourth direction. The protrusion is accommodated in the adjusting groove. One end of the adjusting groove is further away from the inner wall of the first pipe than the other end.

10. The base mechanism according to claim 9, characterized in that, The adjusting rod has a sliding cavity extending along the third direction, the support block is at least partially accommodated in the sliding cavity, the adjusting mechanism further includes a second elastic element extending along the third direction, the two ends of the second elastic element abutting against the support block and the inner wall of the sliding cavity respectively, and the second elastic element is compressed when the locking block exits the second locking hole.

11. The base mechanism according to claim 1, characterized in that, The adjusting rod has a first pushing slope, and the extension direction of the first pushing slope has an angle with both the third direction and the fourth direction. The adjusting button has a second pushing slope, and the second pushing slope is attached to the first pushing slope. The adjustment button can drive the adjusting rod to move along the third direction when it moves along the fourth direction. And / or, The support mechanism further includes a support foot, which is connected to the end of the first pipe protruding outside the second pipe. The width of the support foot is greater than the width of the first pipe. The adjustment button is connected to the support foot and protrudes from the side of the support foot.

12. A child safety seat, characterized in that, include: The base mechanism according to any one of claims 1 to 11; The seat body is mounted on the housing.

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