CN221563196U - Baby seat lifting mechanism and baby stroller comprising same - Google Patents

Abstract

The utility model provides a baby seat lifting mechanism and a baby carriage comprising the same, which are used for adjusting the height of a seat, wherein the baby seat lifting mechanism comprises: the seat is arranged on the lifting table, the lifting table is provided with an unlocking piece, an elastic piece and a positioning part, the positioning part comprises a first abutting surface and a second abutting surface, the positioning part can freely move between a first position and a second position, the elastic piece abuts against the first abutting surface and applies a force towards the second position to the positioning part, and one end of the unlocking piece abuts against the second abutting surface and can apply a force towards the first position to the positioning part; the lifting platform can move up and down in the cavity, and limiting parts are arranged on the inner wall of the cavity in the vertical direction, and the number of the limiting parts is more than 2; the positioning part is matched with the limiting part when being in the second position, and is separated from the limiting part when being in the first position.

Description

Baby seat lifting mechanism and baby stroller comprising same

Technical Field

The utility model relates to a child riding tool, in particular to a child seat lifting mechanism and a child cart comprising the same.

Background

In daily life, the child cart can save the physical strength of adults, and meanwhile, the child is more comfortable to sit in, and is deeply loved by consumers. Consumers often demand different heights for seats in a child stroller. Some parents want the seat to be low in height for safety; some parents want to be closer to the child during travel, so that interaction between parents and children is facilitated, and in this case, consumers want the seat height to be higher. In addition, as children age, they may themselves place demands on the height of the seat, such as desiring a little higher seat for a wider field of view, etc. The common baby carriage is provided with a small part of the baby carriage, the height of the seat can be adjusted, but a rod body exposed suddenly is often arranged above or below the seat or the frame, so that the normal folding of the baby carriage is affected, certain potential safety hazards exist, and the baby carriage is not attractive.

Disclosure of utility model

The utility model aims to overcome the defects that in the prior art, a lifting device of a child stroller seat comprises an exposed rod body, normal folding of the child stroller is affected, and certain potential safety hazards exist.

The utility model solves the technical problems by the following technical scheme:

A child car seat lift mechanism for adjusting a height of a seat, the child car seat lift mechanism comprising: the seat is arranged on the lifting table, the lifting table is provided with an unlocking piece, an elastic piece and a positioning part, the positioning part comprises a first abutting surface and a second abutting surface, the positioning part can move between a first position and a second position, the elastic piece abuts against the first abutting surface and applies a force towards the second position to the positioning part, and one end of the unlocking piece abuts against the second abutting surface and can apply a force towards the first position to the positioning part; the lifting platform can move up and down in the cavity, limiting parts are arranged on the inner wall of the cavity in the vertical direction, and the number of the limiting parts is 2 or more; the positioning part is matched with the limiting part when being in the second position, and is separated from the limiting part when being in the first position.

In this aspect, in the above-described structural form, when the unlocking member does not apply a force to the second abutment surface of the positioning portion, the positioning portion tends to move toward the second position under the action of the elastic member. At this time, if the elevating platform reaches the design height, the locating part is in same horizontal plane with the spacing portion, and the locating part moves to the second position under the effect of elastic component and cooperatees with spacing portion, and the elevating platform is in vertical orientation locking for the base. Because the seat is provided on the lift table, the base is provided on the frame, and at this time, the seat is locked in the height direction with respect to the frame. When the unlocking piece applies an acting force to the second abutting surface of the positioning part, the positioning part moves to the first position to be separated from the limiting part, and the lifting table can move freely relative to the base in the vertical direction. The number of the limiting parts is more than 2, and the limiting parts are arranged in the vertical direction of the inner wall of the cavity, the lifting table can at least adjust the height of 2 gears, namely, the seat can at least adjust the height of 2 gears relative to the frame. Because the base is provided with the cavity, the lifting of the lifting platform is carried out in the cavity, and the whole baby seat lifting mechanism does not have an exposed rod body, so that the normal folding of the baby stroller can not be influenced, and the potential safety hazard can be avoided.

Preferably, the baby seat lifting mechanism further comprises a sleeve, and the seat is detachably arranged on the lifting platform through the sleeve.

In this scheme, the part that the elevating platform stretches out the base at the in-process of adjustment height is wrapped up by the sleeve, can not expose in the automobile body outside. In addition, the sleeve is detachable relative to the lifting platform, so that the seat and the frame can be conveniently assembled and separated.

Preferably, the lifting platform is provided with a clamping part, the clamping part comprises a first bayonet and a second bayonet, the first bayonet and the second bayonet are symmetrically arranged along the central line of the lifting platform, the sleeve is provided with a matching part, and the matching part is detachably clamped with the first bayonet or the second bayonet.

In the scheme, as the first bayonet and the second bayonet are symmetrically arranged along the central line of the lifting platform, the matching part of the sleeve can be detachably clamped with the first bayonet or the second bayonet, namely, the sleeve can be sleeved on the lifting platform from the direction of the first bayonet or the direction of the second bayonet, so that the seat can be positively and negatively installed relative to the frame.

Preferably, the sleeve is provided with a linkage member that can apply a force to the unlocking member toward the positioning portion.

The sleeve is provided with the linkage piece, and the linkage piece can apply effort to the unblock piece, only needs control seat position just can adjust the high setting, easy operation.

Preferably, the lifting platform comprises a main body, a first chute is arranged on the main body in the horizontal direction, and the positioning part is arranged in the first chute and can extend out of the main body from the first chute.

In this scheme, adopt above-mentioned structural style, the location portion removes more smooth between first position and second position, and when location portion and spacing portion matched with, the location portion keeps the height of elevating platform through exerting ascending effort to first spout. The structure is simple and reliable, and the manufacturing cost is low.

Preferably, the outer wall of the main body is attached to the inner wall of the cavity.

In this scheme, adopt above-mentioned structural style, because there is not the clearance between the outer wall of main part and the inner wall of cavity, the elevating platform can not take place horizontal direction's rocking in the reciprocates the in-process, and the elevating process is more stable.

Preferably, the main body is provided with a second chute in the vertical direction, the second chute is communicated with the first chute, the unlocking piece is arranged in the second chute, and the other end of the unlocking piece extends out of the upper surface of the base.

In this scheme, adopt above-mentioned structural style, the unlock piece can reciprocate in the second spout, through the intercommunication department between second spout and the first spout, exerts effort to the location portion. In addition, the other end of the unlocking piece stretches out of the upper surface of the base, so that a user can conveniently control the unlocking piece.

Preferably, the first chute penetrates through the main body, the second chute is communicated with the middle position of the first chute, the number of the positioning parts is 2, and the 2 positioning parts are respectively arranged on two sides of the first chute.

In this scheme, adopt above-mentioned structural style, 2 location portions set up respectively at the both ends of first spout, and the second spout is linked together with the intermediate position of first spout again, and the release piece can control respectively that 2 location portions are ejecting to the both sides of main part through the removal, promptly to the second position removal. At this time, both sides of the main body can be locked with the limiting part, and the lifting platform is more stable and reliable.

Preferably, the positioning portion includes a first end and a second end, the first end is disposed on one side of the unlocking member away from the limiting portion, the second end is disposed on one side of the unlocking member close to the limiting portion, the second abutting surface is an inclined surface and is disposed on the first end, an end surface of the unlocking member abutting against the second abutting surface is an inclined surface, and the second end is matched with the limiting portion.

In this scheme, adopt above-mentioned structural style, because first end setting is in the unlocking piece one side of keeping away from spacing portion, the terminal surface of unlocking piece and second butt face are the inclined plane of mutually supporting, and when the unlocking piece moved downwards, the effort that the terminal surface of unlocking piece was exerted to the second butt face included the component of orientation direction of keeping away from spacing portion. When the first end moves in a direction away from the limiting part, the second end is driven to be separated from the limiting part.

Preferably, the second end is provided with a holding groove, the first chute is fixedly provided with a fixing portion, the fixing portion is located in the holding groove, when the positioning portion moves between the first position and the second position, the holding groove can move relative to the fixing portion, one end of the elastic piece is fixedly arranged on the fixing portion, and the other end of the elastic piece is abutted to the holding groove, which is close to the inner wall of the limiting portion, and applies force towards the direction of the limiting portion to the second end.

In this scheme, adopt above-mentioned structural style, fixed part is fixed to be set up in first spout, and when the second end moved to the direction of keeping away from spacing portion, the elastic component between fixed part and the holding tank received the compression, exerted the power towards spacing portion direction to the holding tank of second end.

Preferably, the positioning portion includes a connecting piece, and the first end and the second end are connected by the connecting piece.

In this scheme, adopt above-mentioned structural style, the connection piece thickness is thinner, and the space is great between first end and second end of location portion, makes things convenient for the unlock piece to reciprocate.

A stroller comprising the above-described child car seat lifting mechanism.

In this aspect, in the above-described structural form, when the unlocking member does not apply a force to the second abutment surface of the positioning portion, the positioning portion tends to move toward the second position under the action of the elastic member. At this time, if the elevating platform reaches the design height, the locating part is in same horizontal plane with the spacing portion, and the locating part moves to the second position under the effect of elastic component and cooperatees with spacing portion, and the elevating platform is in vertical orientation locking for the base. When the unlocking piece applies an acting force to the second abutting surface of the positioning part, the positioning part moves to the first position to be separated from the limiting part, and the lifting table can move freely relative to the base in the vertical direction. The number of the limiting parts is more than 2, and the limiting parts are arranged in the vertical direction of the inner wall of the cavity, so that the lifting table can at least adjust the height of 2 gears. Because the base is provided with the cavity, the lifting of the lifting platform is carried out in the cavity, and the whole baby seat lifting mechanism does not have an exposed rod body, so that the normal folding of the baby stroller can not be influenced, and the potential safety hazard can be avoided.

The utility model has the positive progress effects that: when the unlocking piece does not apply force to the second abutting surface of the positioning part, the positioning part tends to move towards the second position under the action of the elastic piece. At this time, if the elevating platform reaches the design height, the locating part is in same horizontal plane with the spacing portion, and the locating part moves to the second position under the effect of elastic component and cooperatees with spacing portion, and the elevating platform is in vertical orientation locking for the base. Because the seat is provided on the lift table, the base is provided on the frame, and at this time, the seat is locked in the height direction with respect to the frame. When the unlocking piece applies an acting force to the second abutting surface of the positioning part, the positioning part moves to the first position to be separated from the limiting part, and the lifting table can move freely relative to the base in the vertical direction. The number of the limiting parts is more than 2, and the limiting parts are arranged in the vertical direction of the inner wall of the cavity, the lifting table can at least adjust the height of 2 gears, namely, the seat can at least adjust the height of 2 gears relative to the frame. Because the base is provided with the cavity, the lifting of the lifting platform is carried out in the cavity, and the whole baby seat lifting mechanism does not have an exposed rod body, so that the normal folding of the baby stroller can not be influenced, and the potential safety hazard can be avoided.

Drawings

FIG. 1 is a schematic view of a seat and sleeve according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a frame structure according to an embodiment of the utility model.

Fig. 3 is a schematic structural view of a lifting platform and a base according to an embodiment of the utility model.

Fig. 4 is an exploded view of a lift table according to an embodiment of the present utility model.

Fig. 5 is an exploded view of a sleeve according to an embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of a clamping portion and a mating portion according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 8 is a schematic diagram of another structure of an embodiment of the present utility model.

Fig. 9 is a schematic structural view of an unlocking member and a positioning portion according to an embodiment of the utility model.

Fig. 10 is another schematic structural view of the unlocking member and the positioning portion according to an embodiment of the present utility model.

Fig. 11 is a schematic structural view of a positioning portion according to an embodiment of the utility model.

Description of the reference numerals

Lifting table 1

Unlocking piece 11

Elastic member 12

Positioning part 13

Body 14

First slide groove 141

Fixing portion 1411

Pin hole 1412

Second chute 142

First end 131

First abutment surface 1321

Second end 132

Second abutment surface 1311

Receiving slot 1322

Notch 13221

Connecting piece 133

Clamping part 15

First bayonet 151

Second bayonet 152

Base 2

Cavity 21

Limit part 211

Sleeve 31

Linkage 311

Mating portion 312

Chair 4

Frame 5

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

As shown in fig. 1 to 11, the present utility model provides a child car seat lifting mechanism for adjusting the height of a seat 4, the child car seat lifting mechanism comprising: the lifting platform 1, the seat 4 is arranged on the lifting platform 1, the lifting platform 1 is provided with an unlocking piece 11, an elastic piece 12 and a positioning part 13, the positioning part 13 comprises a first abutting surface 1321 and a second abutting surface 1311, the positioning part 13 can freely move between a first position and a second position, the elastic piece 12 abuts against the first abutting surface 1321 and applies a force towards the second position to the positioning part 13, and one end of the unlocking piece 11 abuts against the second abutting surface 1311 and can apply a force towards the first position to the positioning part 13; the lifting platform comprises a base 2, wherein the base 2 is arranged on a frame 5, the base 2 is provided with a cavity 21, the lifting platform 1 can move up and down in the cavity 21, the inner wall of the cavity 21 is provided with limiting parts 211 in the vertical direction, the limiting parts 211 are in a clamping groove shape, and the number of the limiting parts 211 is 3; the positioning portion 13 is matched with the limiting portion 211 when being in the second position, and is separated from the limiting portion 211 when the positioning portion 13 is in the first position.

In the present embodiment, in the above-described structural form, when the unlocking member 11 does not apply a force to the second abutment surface 1311 of the positioning portion 13, the positioning portion 13 tends to move toward the second position by the elastic member 12. At this time, if the lifting platform 1 reaches the design height, the positioning portion 13 and the limiting portion 211 are at the same horizontal plane, the positioning portion 13 moves to the second position under the action of the elastic member 12 to be matched with the limiting portion 211, and the lifting platform 1 is locked in the vertical direction relative to the base 2. Because the seat 4 is provided on the elevating platform 1, the base 2 is provided on the frame 5, and at this time, the seat 4 is locked in the height direction with respect to the frame 5. When the unlocking member 11 applies a force to the second abutment surface 1311 of the positioning portion 13, the positioning portion 13 moves to the first position and is separated from the stopper 211, and the lift table 1 is freely movable in the vertical direction with respect to the base 2. Since the number of the limiting parts 211 is 3 and the limiting parts are arranged in the vertical direction of the inner wall of the cavity 21, the lifting platform 1 can adjust the height of 3 gears, namely, the seat 4 can adjust the height of 3 gears relative to the frame 5. Because the base 2 is provided with the cavity 21, the lifting of the lifting platform 1 is carried out in the cavity 21, and the whole baby seat lifting mechanism has no exposed rod body, so that the normal folding of the baby stroller can not be influenced, and the potential safety hazard can be avoided.

As shown in fig. 1, 2 and 7, as a preferred embodiment, the baby seat lifting mechanism further includes a sleeve 31, and the seat 4 is detachably disposed on the lifting platform 1 through the sleeve 31.

In the present embodiment, the portion of the elevating platform 1 extending out of the base during the height adjustment is covered with the sleeve 31, and is not exposed to the outside of the vehicle body. In addition, the sleeve 31 is detachable relative to the lifting platform 1, so that the seat 4 and the frame 5 can be conveniently assembled and separated.

As shown in fig. 5 to 6, as a preferred embodiment, the lifting platform 1 is provided with a clamping portion 15, the clamping portion 15 includes a first bayonet 151 and a second bayonet 152, the first bayonet 151 and the second bayonet 152 are symmetrically arranged along a central line of the lifting platform 1, the sleeve 31 is provided with a matching portion 312, and the matching portion 312 is detachably clamped with the first bayonet 151 or the second bayonet 152.

In this embodiment, since the first bayonet 151 and the second bayonet 152 are symmetrically disposed along the center line of the lifting platform 1, the engaging portion 312 of the sleeve 31 may be detachably engaged with the first bayonet 151 or the second bayonet 152, that is, the sleeve 31 may be sleeved on the lifting platform from the direction of the first bayonet 151 or the lifting platform 1 from the direction of the second bayonet 152, so that the seat 4 may be mounted in a forward and backward direction with respect to the frame 5.

As a preferred embodiment, the sleeve 31 is provided with a linkage 311, and the linkage 311 can apply a force to the unlocking member 11 toward the positioning portion 13.

The sleeve 31 is provided with the linkage piece 311, and the linkage piece 311 can apply effort to the unlocking piece 11, only need control seat 4 position just can adjust the high setting, easy operation.

As shown in fig. 3 and 4, as a preferred embodiment, the lifting platform 1 includes a main body 14, a reinforcing rib is provided on the main body 14, a first chute 141 is provided on the main body 14 in a horizontal direction, and the positioning portion 13 is movably provided in the first chute 141 and can extend out of the main body 14 from the first chute 141.

In the present embodiment, with the above-described configuration, the positioning portion 13 moves between the first position and the second position more smoothly, and when the positioning portion 13 is engaged with the stopper portion 211, the positioning portion 13 maintains the height of the elevating platform 1 by applying an upward force to the first chute 141. The structure is simple and reliable, and the manufacturing cost is low.

As a preferred embodiment, the outer wall of the body 14 is fitted to the inner wall of the cavity 21.

In this embodiment, with the above-described structural form, since there is no gap between the outer wall of the main body 14 and the inner wall of the cavity 21, the lifting table 1 does not shake in the horizontal direction during the up-down movement, and the lifting process is more stable.

As a preferred embodiment, the main body 14 is provided with a second sliding groove 142 in the vertical direction, the second sliding groove 142 is communicated with the first sliding groove 141, the unlocking member 11 is disposed in the second sliding groove 142, and the other end of the unlocking member 11 extends out of the upper surface of the base 2.

In this embodiment, in the above-described structure, the unlocking member 11 can move up and down in the second chute 142, and applies a force to the positioning portion 13 through the communication between the second chute 142 and the first chute 141. In addition, the other end of the unlocking piece 11 extends out of the upper surface of the base 2, so that a user can conveniently control the unlocking piece 11.

As a preferred embodiment, the first sliding groove 141 penetrates the main body 14, the second sliding groove 142 is communicated with the middle position of the first sliding groove 141, the number of the positioning parts 13 is 2, and the 2 positioning parts 13 are respectively arranged at two sides of the first sliding groove 141.

In this embodiment, with the above structure, the 2 positioning portions 13 are respectively disposed at two ends of the first chute 141, and the second chute 142 is further connected to the middle position of the first chute 141, so that the unlocking member 11 can respectively control the 2 positioning portions 13 to eject to two sides of the main body 14, i.e. move to the second position, by moving. At this time, both sides of the main body 14 can be locked with the limiting parts 211, so that the lifting platform 1 is more stable and reliable.

As shown in fig. 8 to 11, as a preferred embodiment, the positioning portion 13 includes a first end 131 and a second end 132, the first end 131 is disposed on a side of the unlocking member 11 away from the limiting portion 211, the second end 132 is disposed on a side of the unlocking member 11 near the limiting portion 211, the second abutment surface 1311 is an inclined plane and is disposed on the first end 131, an end surface of the unlocking member 11 abutted against the second abutment surface 1311 is an inclined plane, and the second end 132 is matched with the limiting portion 211.

In this embodiment, with the above-mentioned structure, since the first end 131 is disposed on the side of the unlocking member 11 away from the limiting portion 211, the end surface of the unlocking member 11 and the second abutment surface 1311 are mutually matched inclined surfaces, and when the unlocking member 11 moves downward, the force applied by the end surface of the unlocking member 11 to the second abutment surface 1311 includes a component force directed away from the limiting portion 211. When the first end 131 moves away from the limiting portion 211, the second end 132 is driven to separate from the limiting portion 211.

As shown in fig. 4 and 8-11, as a preferred embodiment, the second end 132 is provided with a receiving groove 1322, the first sliding groove 141 is fixedly provided with a fixing portion 1411, the fixing portion 1411 is a pin, the first sliding groove 141 is provided with a pin hole 1412, the fixing portion 1411 is fixedly arranged in the first sliding groove 141 through the pin hole 1412, the bottom of the receiving groove 1322 is further provided with an elongated notch 13221, and the size of the notch 13221 is determined according to the stroke distance between the locking and unlocking of the positioning portion 13 and the limiting portion 211, if the width of the notch 13221 is selected to be larger than the diameter of the pin 1411, therefore, when the positioning portion 13 moves between the first position and the second position, the positioning portion 13 can reciprocate in the stroke gap of the elongated notch 13221 relative to the fixing portion 1411, so that the positioning portion 13 can reciprocate in the first position and the second position to lock or unlock the lifting platform 1. The elastic member 12 is a spring to urge the positioning portion 13 toward the return movement of the position of the limiting portion 211 by the return force of the elastic member 12. If one end of the elastic member 12 is fixedly disposed on the fixing portion 1411, the other end of the elastic member 12 abuts against an inner wall of the accommodating groove 1322 near the limiting portion 211 and applies a force toward the limiting portion 211 to the second end 132. The unlocking piece 11 is also provided with a spring, and when the unlocking piece 11 moves downwards, the spring is compressed to apply upward acting force to the unlocking piece 11, so that the rebound or reset effect of the positioning part 13 is better. Of course, in other embodiments, the unlocking member 11 may not be provided with a spring.

In the present embodiment, in the above-described configuration, the fixing portion 1411 is fixedly disposed in the first sliding groove 141, and when the second end 132 moves in a direction away from the limiting portion 211, the elastic member 12 between the fixing portion 1411 and the accommodating groove 1322 is compressed, and a force in a direction toward the limiting portion 211 is applied to the accommodating groove 1322 of the second end 132. Of course, in other embodiments, the receiving slot 1322 may extend through the second end 132, i.e., the receiving slot 1322 may not have a slot bottom, and the receiving slot 1322 may also be movable relative to the pin 1411. In addition, if the accommodating groove 1322 has a groove bottom, if the fixing portion 1411 is a protrusion of the first sliding groove 141 toward the opening side of the accommodating groove 1322, that is, the fixing portion 1411 does not penetrate the positioning portion 13, a corresponding function can be achieved.

As shown in fig. 11, as a preferred embodiment, the positioning portion 13 includes a connecting piece 133, and the first end 131 and the second end 132 are connected by the connecting piece 133.

In this embodiment, with the above-mentioned structure, the connecting piece 133 is thinner, and the space between the first end 131 and the second end 132 of the positioning portion 13 is larger, so that the unlocking member 11 can be moved up and down conveniently.

The embodiment also provides a child stroller, which comprises the child car seat lifting mechanism.

In the present embodiment, in the above-described structural form, when the unlocking member 11 does not apply a force to the second abutment surface 1311 of the positioning portion 13, the positioning portion 13 tends to move toward the second position by the elastic member 12. At this time, if the lifting platform 1 reaches the design height, the positioning portion 13 and the limiting portion 211 are at the same horizontal plane, the positioning portion 13 moves to the second position under the action of the elastic member 12 to be matched with the limiting portion 211, and the lifting platform 1 is locked in the vertical direction relative to the base 2. When the unlocking member 11 applies a force to the second abutment surface 1311 of the positioning portion 13, the positioning portion 13 moves to the first position and is separated from the stopper 211, and the lift table 1 is freely movable in the vertical direction with respect to the base 2. Since the number of the limiting parts 211 is 2 or more and is arranged in the vertical direction of the inner wall of the cavity 21, the lifting table 1 can at least adjust the height of 2 steps. Because the base 2 is provided with the cavity 21, the lifting of the lifting platform 1 is carried out in the cavity 21, and the whole baby seat lifting mechanism has no exposed rod body, so that the normal folding of the baby stroller can not be influenced, and the potential safety hazard can be avoided.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (12)

1. A child car seat lifting mechanism for adjusting the height of a seat, the child car seat lifting mechanism comprising:

The seat is arranged on the lifting table, the lifting table is provided with an unlocking piece, an elastic piece and a positioning part, the positioning part comprises a first abutting surface and a second abutting surface, the positioning part can move between a first position and a second position, the elastic piece abuts against the first abutting surface and applies a force towards the second position to the positioning part, and one end of the unlocking piece abuts against the second abutting surface and can apply a force towards the first position to the positioning part;

The lifting platform can move up and down in the cavity, limiting parts are arranged on the inner wall of the cavity in the vertical direction, and the number of the limiting parts is 2 or more;

When the positioning part is in the second position, the lifting table is locked with the base, and when the positioning part is in the first position, the lifting table is unlocked with the base.

2. The juvenile seat lift mechanism of claim 1, further comprising a sleeve through which the seat is removably disposed on the lift table.

3. The child car seat lifting mechanism of claim 2, wherein the lifting platform is provided with a clamping portion, the clamping portion comprises a first bayonet and a second bayonet, the first bayonet and the second bayonet are symmetrically arranged along a center line of the lifting platform, the sleeve is provided with a matching portion, and the matching portion is detachably clamped with the first bayonet or the second bayonet.

4. The child car seat lift mechanism of claim 2 wherein the sleeve is provided with a linkage that can transmit force to the unlocking member.

5. The child car seat lifting mechanism according to claim 1, wherein the lifting table includes a main body provided with a first slide groove in a horizontal direction, and the positioning portion is provided in the first slide groove and is extendable from the first slide groove to the main body.

6. The stroller seat lift mechanism of claim 5, wherein the outer wall of the body conforms to the inner wall of the cavity.

7. The child car seat lifting mechanism according to claim 5, wherein the main body is provided with a second chute in a vertical direction, the second chute is communicated with the first chute, the unlocking piece is arranged in the second chute, and the other end of the unlocking piece extends out of the upper surface of the base.

8. The child car seat lifting mechanism according to claim 7, wherein the number of the positioning portions is 2, and 2 positioning portions are respectively disposed on both sides of the first slide groove.

9. The stroller seat lift mechanism of claim 8, wherein the positioning portion includes a first end and a second end, the first end is disposed on a side of the unlocking member away from the limiting portion, the second end is disposed on a side of the unlocking member near the limiting portion, the second abutment surface is an inclined surface and is disposed on the first end, an end surface of the unlocking member abutting the second abutment surface is an inclined surface, and the second end is matched with the limiting portion.

10. The child car seat lifting mechanism according to claim 9, wherein the second end is provided with a receiving groove, the first sliding groove is fixedly provided with a fixing portion, the fixing portion is located in the receiving groove, the receiving groove is movable relative to the fixing portion when the positioning portion moves between the first position and the second position, one end of the elastic member is disposed on one side of the fixing portion, and the other end of the elastic member abuts against an inner wall of the receiving groove adjacent to the limiting portion and applies a force to the second end in a direction toward the limiting portion.

11. The stroller seat lift mechanism of claim 9, wherein the positioning portion comprises a tab, the first end and the second end being connected by the tab.

12. A stroller comprising a child seat lift mechanism according to any one of claims 1-11.