A stroller seat lifting apparatus and a stroller using it

Abstract

Apparatus, for adjusting the height of a stroller seat, comprising a lifting platform 1, on which a seat (4, Figure 1) is positioned, with an unlocking element 11, a resilient element 12, and a positi

Description

Technology Field

[0001] This invention relates to a child transportation tool, especially relates to a stroller seat lifting apparatus and a stroller using it. Background of The Invention

[00002] Strollers can save adults' physical energy in daily life, and they are also more comfortable for children to ride inside, which is deeply preferred by consumers. Consumers often have different demands for the height of seats in strollers. Some parents, for safety reasons, hope that the height of the seats is lower; Some parents hope to be closer to their children during travel, enhancing interaction between parents and children. In this case, consumers hope that the seat height can be higher. In addition, as children grow up, they will also have their own requirements for the height of the seats, such as wanting the seats to be higher for a wider view. Common strollers have seats that cannot be adjusted in height. Although a small number of strollers can adjust the seat height, there are often protruding rods above or below the seat or frame, which not only affect the normal folding of strollers, which also pose certain safety hazards and are not aesthetically pleasing. Summary of The Invention

[0003] The technical problem to be solved by this invention is to overcome the defect that the lifting device of the stroller seat in the prior art comprises an exposed rod body, which not only affects the normal folding of the stroller, but also has certain safety hazards. A stroller seat lifting apparatus and a stroller using it are provided.

[0004] This invention solves the above-mentioned technical problems through the following technical solutions relating:

[0005] A stroller seat lifting apparatus for adjusting the height of a seat, wherein the stroller seat lifting apparatus comprises: a lifting platform, wherein the seat is disposed on the lifting platform, wherein the lifting platform is provided with an unlocking element, a resilient element, and a positioning part, wherein the positioning part comprises a first and a second contact surfaces, wherein the positioning part can move between the first and second positions, wherein the resilient element is in contact with the first contact surface and applies a force towards the second position to the positioning part, and one end of the unlocking element is in contact with the second contact surface and can apply a force towards the first position to the positioning part; A base is disposed on the frame, and the base is provided with a chamber. The lifting platform can move up and down in the chamber, and the inner wall of the chamber is provided with a limiting part in the vertical direction. The number of limiting parts is 2 or more; When the positioning part is in the second position, it matches with the limiting part, and when the positioning part is in the first position, it separates from the limiting part.

[0006] In this embodiment, the above structural form is applied. When the unlocking element does not apply force to the second contact surface of the positioning part, the positioning part tends to move towards the second position under the action of the resilient element. At this point, if the lifting platform reaches the designed height, the positioning part and the limiting part are in the same horizontal plane. Under the action of the resilient element, the positioning part moves to the second position to match with the limiting part, and the lifting platform is locked in the vertical direction relative to the base. Because the seat is disposed on the lifting platform and the base is disposed on the frame, the seat is locked in the height direction relative to the frame. When the unlocking element applies a force to the second contact surface of the positioning part, the positioning part moves towards the first position and separates from the limiting part. The lifting platform can move freely in the vertical direction relative to the base. Due to the number of limiting parts being more than 2 and being disposed vertically on the inner wall of the chamber, the lifting platform can adjust the height by at least 2 gears, that is, the seat can adjust the height by at least 2 gears relative to the frame. Due to the presence of a chamber in the base, the lifting of the lifting platform is carried out inside the chamber. The entire stroller seat lifting apparatus has no exposed rod body, which will not affect the normal folding of the stroller and can avoid safety hazards.

[0007] Preferably, the stroller seat lifting apparatus further comprises a sleeve, and the seat can be detachably disposed on the lifting platform through the sleeve.

[0008] In this embodiment, the part of the lifting platform that extends out of the base during height adjustment is wrapped by a sleeve and will not be exposed on the outside of the vehicle body. In addition, the sleeve is detachable relative to the lifting platform, making it convenient for the assembly and separation of the seat and frame.

[0009] Preferably, the lifting platform is provided with a bayonet, which comprises a first and a second bayonet. The first and second bayonets are symmetrically arranged along the centerline of the lifting platform, and the sleeve is provided with a fitting portion, which can be detachably clamped with the first or second bayonets.

[0010] In this embodiment, as the first and second bayonets are symmetrically arranged along the centerline of the lifting platform, the fitting part of the sleeve can be detachably clamped with the first or second bayonet. That is, the sleeve can be disposed on the lifting platform from the direction of the first bayonet or from the direction of the second bayonet, so the seat can be installed relative to the front and back of the frame.

[0011] Preferably, the sleeve is provided with a linkage element, which can apply a force towards the positioning part to the unlocking element.

[0012] The sleeve is provided with a linkage element, which can apply force to the unlocking element. Simply control the seat area to adjust the height position, and the operation is simple.

[0013] Preferably, the lifting platform comprises a main body, wherein the main body is provided with a first sliding groove in the horizontal direction, and the positioning part is arranged within the first sliding groove and can extend out of the main body from the first sliding groove.

[0014] In this embodiment, the above structural form is applied, and the positioning part moves more smoothly between the first and second positions. When the positioning part is matched with the limiting part, the positioning part maintains the height of the lifting platform by applying an upward force to the first sliding groove. This structure is simple and reliable, with low manufacturing costs.

[0015] Preferably, the outer wall of the main body is in contact with the inner wall of the chamber.

[0016] In this embodiment, the above structural form is applied. As there is no gap between the outer wall of the main body and the inner wall of the chamber, the lifting platform will not experience horizontal shaking during the up and down movement, making the lifting process more stable.

[0017] Preferably, the main body is provided with a second sliding groove in the vertical direction, which is connected to the first sliding groove. The unlocking member is disposed inside the second sliding groove, and the other end of the unlocking member extends out of the upper surface of the base.

[0018] In this embodiment, by applying the above structural form, the unlocking element can move up and down within the second sliding groove and apply a force to the positioning part through the connection between the second sliding groove and the first sliding groove. In addition, the other end of the unlocking element extends out of the upper surface of the base, making it convenient for users to control the unlocking element.

[0019] Preferably, the first sliding groove runs through the main body, and the second sliding groove is connected to the middle position of the first sliding groove. The number of positioning parts is 2, and the 2 positioning parts are respectively disposed on both sides of the first sliding groove.

[0020] In this embodiment, the above structural fonn is applied, with two positioning parts disposed at both ends of the first sliding groove, and the second sliding groove is connected to the middle position of the first sliding groove. The unlocking element can control the two positioning parts to push out towards both sides of the main body by moving, that is, to move towards the second position. At this point, both sides of the main body can be locked with the limiting part, making the lifting platform more stable and reliable.

[0021] Preferably, the positioning part comprises a first end and a second end, wherein the first end is provided on the side away from the limiting part of the unlocking element, the second end is provided on the side close to the limiting part of the unlocking element, the second contact surface is an inclined plane and is disposed on the first end, and the end face of the unlocking element and the second contact surface are inclined planes, and the second end is matched with the limiting part.

[0022] In this embodiment, the above structural form is applied. As the first end is disposed on the side away from the limiting part of the unlocking element, the end face of the unlocking element and the second contact surface are mutually matched inclined planes. When the unlocking element moves downwards, the force applied by the end face of the unlocking element to the second contact surface comprises a component force towards the direction away from the limiting part. When the first end moves away from the limiting part, it drives the second end to separate from the limiting part.

[0023] Preferably, the second end is provided with an accommodating groove, and the first sliding groove is fixedly provided with a fixing part, which is located inside the accommodating groove. When the positioning part moves between the first and second positions, the accommodating groove can move relative to the fixing part. One end of the resilient element is fixedly disposed on the fixing part, and the other end of the resilient element is abutted on the inner wall of the accommodating groove near the limiting part and applies a force towards the direction of the limiting part to the second end.

[0024] In this embodiment, the above structural form is applied, and the fixing part is fixed in the first sliding groove. When the second end moves away from the limiting part, the resilient element between the fixing part and the accommodating groove is compressed, and a force towards the direction of the limiting part is applied to the accommodating groove at the second end.

[0025] Preferably, the positioning part comprises a connecting piece, and the first end and the second end are connected through the connecting piece.

[0026] In this embodiment, the above-mentioned structural form is applied, with a thinner thickness of the connecting piece and a larger space for the positioning part between the first and second ends, making it convenient for the unlocking element to move up and down.

[0027] A stroller, wherein the stroller comprises a stroller seat lifting apparatus mentioned above.

[0029] In this embodiment, the above structural fonn is applied. When the unlocking element does not apply a force to the second contact surface of the positioning part, the positioning part tends to move towards the second position under the action of the resilient element. At this point, if the lifting platform reaches the designed height, the positioning part and the limiting part are in the same horizontal plane. Under the action of the resilient element, the positioning part moves to the second position to cooperate with the limiting part, and the lifting platform is locked in the vertical direction relative to the base. When the unlocking element applies a force to the second contact surface of the positioning part, the positioning part moves towards the first position and separates from the limiting part. The lifting platform can move freely in the vertical direction relative to the base. Due to the number of limiting parts being more than 2 and being disposed vertically on the inner wall of the chamber, the lifting platform can adjust the height by at least 2 gears. Due to the presence of a chamber in the base, the lifting of tire lifting platform is carried out inside the chamber. The entire stroller seat lifting apparatus has no exposed rod body, which will not affect the normal folding of the stroller and can avoid safety hazards.

[0029] The positive progressive effect of this invention is that when the unlocking element does not apply a force to the second contact surface of the positioning part, the positioning part tends to move towards the second position under the action of the resilient element. At this point, if the lifting platform reaches the design height, the positioning part and the limiting part are in the same horizontal plane. Under the action of the resilient element, the positioning part moves to the second position to cooperate with the limiting part, and the lifting platform is locked in the vertical direction relative to the base. Because the seat is disposed on the lifting platform and the base is disposed on the frame, the seat is locked in the height direction relative to the frame. When the unlocking element applies a force to the second contact surface of the positioning part, the positioning part moves towards the first position and separates from the limiting part. The lifting platform can move freely in the vertical direction relative to the base. Due to the number of limiting parts being more than 2 and being disposed vertically on the inner wall of the chamber, the lifting platfonn can adjust the height by at least 2 gears, that is, the seat can adjust the height by at least 2 gears relative to the frame. Due to the presence of a chamber in the base, the lifting of the lifting platform is carried out inside the chamber. The entire stroller seat lifting apparatus has no exposed rod body, which will not affect the normal folding of the stroller and can avoid safety hazards. Description of Drawings

[0030] Figure 1 is a schematic diagram of the structure of a seat and a sleeve in an embodiment of this invention.

[0031] Figure 2 is a schematic diagram of the frame structure of an embodiment of this invention.

[0032] Figure 3 is a schematic diagram of the structure of a lifting platform and a base in an embodiment of this invention.

[0033] Figure 4 is an exploded view of a lifting platform in an embodiment of this invention.

[0034] Figure 5 is an exploded view of a sleeve in an embodiment of this invention.

[0035] Figure 6 is a schematic diagram of the structure of the clamping part and the fitting part of an embodiment of this invention.

[0036] Figure 7 is a structural schematic diagram of an embodiment of this invention.

[0037] Figure 8 is another schematic diagram of an embodiment of this invention.

[0038] Figure 9 is a schematic diagram of the structure of the unlocking element and the positioning part in an embodiment of this invention.

[0039] Figure 10 is another schematic diagram of the unlocking element and positioning part in an embodiment of this invention.

[0040] Figure 11 is a schematic diagram of the structure of the positioning part of an embodiment of this invention. List of Reference Numerals

[0041] Lift platform 1

[0042] Unlocking element 11

[0043] Resilient element 12

[0044] Positioning part 13

[0045] Main body 14

[0046] First sliding groove 141

[0047] Fixing part 1411

[0048] Pin hole 1412

[0049] Second sliding groove 142

[0050] First end 131

[0051] First contact surface 1321

[0052] Second end 132

[0053] Second contact surface 1311

[0054] Accommodation groove 1322

[0055] Gap 13221

[0056] Connecting piece 133

[0057] Clamping part 15

[0058] First bayonet 151

[0059] Second bayonet 152

[0060] Base 2

[0061] Chamber 21

[0062] Limiting part 211

[0063] Sleeve 31

[0064] Linkage element 311

[0065] Fitting part 312

[0066] Seat 4

[0067] Frame 5 Detailed Description of Embodiments

[0068] Here is a preferred embodiment, combined with the accompanying drawings, to provide a clearer and more complete explanation of this invention.

[0069] As shown in Figures 1 to 11, this invention provides a stroller seat lifting apparatus for adjusting the height of seat 4. The stroller seat lifting apparatus comprises lifting platform 1, seat 4 is disposed on lifting platform 1, lifting platform 1 is provided with an unlocking element 11, a resilient element 12, and a positioning part 13. The positioning part 13 comprises a first contact surface 1321 and a second contact surface 1311, and the positioning part 13 can move freely between the first and second positions. The resilient element 12 is in contact with the first contact surface 1321 and applies a force towards the positioning part 13 towards the second position. One end of the unlocking element 11 is in contact with the second contact surface 1311 and can be applied to the positioning part 13. Force towards the first position; Base 2, base 2 is installed on the frame 5, and base 2 is provided with a chamber 21. The lifting platform 1 can move up and down inside the chamber 21. The inner wall of the chamber 21 is provided with a limiting part 211 in a vertical direction, which is in a slot like shape. The number of limiting parts 211 is 3; When the positioning part 13 is in the second position, it cooperates with the limiting part 211, and when the positioning part 13 is in the first position, it separates from the limiting part 211.

[0070] In this embodiment, using the above structural form, when the unlocking element 11 does not apply a force to the second contact surface 1311 of the positioning part 13, the positioning part 13 tends to move towards the second position under the action of the resilient element 12. At this point, if the lifting platform 1 reaches the design height, the positioning part 13 and the limiting part 211 are in the same horizontal plane. Under the action of the resilient element 12, the positioning part 13 moves to the second position to cooperate with the limiting part 211, and the lifting platform 1 is locked vertically relative to the base 2. Because seat 4 is disposed on lifting platform 1 and base 2 is disposed on frame 5, seat 4 is locked in the height direction relative to frame 5. When unlocking element 11 applies a force to the second contact surface 1311 of the positioning part 13, the positioning part 13 moves towards the first position and separates from the limiting part 211. The lifting platform 1 can move freely in the vertical direction relative to the base 2. Due to the number of limiting parts 211 being three and being disposed vertically on the inner wall of chamber 21, lifting platform 1 can adjust the height of the third gear, that is, seat 4 can adjust the height of the third gear relative to frame 5. Due to the presence of chamber 21 in base 2, the lifting of lifting platform 1 is carried out inside chamber 21. The entire stroller seat lifting apparatus has no exposed rod body, which will not affect the normal folding of the stroller and can avoid safety hazards. [0071 ] As shown in Figures 1, 2, and 7, as a preferred embodiment, the stroller seat lifting apparatus further comprises a sleeve 31, and the seat 4 can be detachably disposed on the lifting platform 1 through the sleeve 31.

[0072] In this embodiment, the portion of the lifting platform 1 that extends out of the base during height adjustment is wrapped by a sleeve 31 and will not be exposed on the outside of the vehicle body. In addition, the sleeve 31 is detachable relative to the lifting platform 1, which facilitates the assembly and separation of seat 4 and frame 5.

[73] As shown in Figures 5-6, as a preferred embodiment, the lifting platform 1 is provided with a bayonet 15, which comprises a first bayonet 151 and a second bayonet 152. The first bayonet 151 and the second bayonet 152 are symmetrically arranged along the centerline of the lifting platform 1. The sleeve 31 is provided with a fitting part 312, which can be detachably clamped with the first bayonet 151 or the second bayonet 152.

[0074] In this embodiment, due to the symmetrical arrangement of the first bayonet 151 and the second bayonet 152 along the centerline of the lifting platform 1, the fitting part 312 of the sleeve 31 can be detachably clamped with the first bayonet 151 or the second bayonet 152. That is, the sleeve 31 can be installed on the lifting platform from the direction of the first bayonet 151 or from the direction of the second bayonet 152, so that the seat 4 can be installed in front and back relative to the frame 5.

[0075] As a better embodiment method, the sleeve 31 is provided with a linkage element 311, which can apply a force towards the positioning part 13 to the unlocking element 11.

[0076] Sleeve 31 is provided with a linkage element 311, which can apply force to unlocking element 11. Simply control seat 4 to adjust the height setting, and the operation is simple.

[0077] As shown in Figures 3 and 4, as a preferred embodiment, the lifting platform 1 comprises a main body 14, which is provided with reinforcing ribs. The main body 14 is provided with a first sliding groove 141 in the horizontal direction, and the positioning part 13 is movable within the first sliding groove 141 and can extend out of the main body 14 from the first sliding groove 141.

[0078] In this embodiment, using the above structural form, the positioning part 13 moves more smoothly between the first and second positions. When the positioning part 13 is matched with the limiting part 211, the positioning part 13 maintains the height of the lifting platform 1 by applying an upward force to the first sliding groove 141. This structure is simple and reliable, with low manufacturing costs.

[0079] As a preferred embodiment, the outer wall of the main body 14 is in contact with the inner wall of the chamber 21.

[0080] In this embodiment, the above structural form is applied. As there is no gap between the outer wall of the main body 14 and the inner wall of the chamber 21, the lifting platform 1 will not experience horizontal shaking during the up and down movement, making the lifting process more stable.

[0081] As a preferred embodiment, the main body 14 is provided with a second sliding groove 142 in the vertical direction, which is connected to the first sliding groove 141. The unlocking element 11 is arranged inside the second sliding groove 142, and the other end of the unlocking element 11 extends out of the upper surface of the base 2.

[0082] In this embodiment, using the above structural form, the unlocking element 11 can move up and down within the second sliding groove 142, and apply a force to the positioning part 13 through the connection between the second sliding groove 142 and the first sliding groove 141. In addition, the other end of the unlocking element 11 extends out of the upper surface of the base 2, making it convenient for the user to control the unlocking element 11.

[0083] As a preferred embodiment, the first sliding groove 141 runs through the main body 14, and the second sliding groove 142 is connected to the middle position of the first sliding groove 141. The number of positioning parts 13 is 2, and the two positioning parts 13 are respectively disposed on both sides of the first sliding groove 141.

[0084] In this embodiment, the above structural form is applied, and two positioning parts 13 are respectively disposed at both ends of the first sliding groove 141, and the second sliding groove 142 is connected to the middle position of the first sliding groove 141. The unlocking element 11 can control the two positioning parts 13 to push out towards both sides of the main body 14 by moving, that is, to move towards the second position. At this time, both sides of the main body 14 can be locked with the limiting part 211, making the lifting platform 1 in a more stable and reliable state.

[0085] As shown in Figures 8 to 11, as a preferred embodiment, the positioning portion 13 comprises a first end 131 and a second end 132. The first end 131 is provided on the side away from the limiting part 211 of the unlocking element 11, the second end 132 is provided on the side near the limiting part 211 of the unlocking element 11, the second contact surface 1311 is an inclined surface and is disposed on the first end 131. The end face of the unlocking element 11 that is in contact with the second contact surface 1311 is an inclined surface, and the second end 132 is matched with the limiting part 211.

[0086] In this embodiment, the above structural form is applied. As the first end 131 is disposed on the side away from the limiting part 211 of the unlocking element 11, the end face of the unlocking element 11 and the second contact surface 1311 are mutually matched inclined planes. When the unlocking element 11 moves downwards, the force applied by the end face of the unlocking element 11 to the second contact surface 1311 comprises a component force towards the direction away from the limiting part 211. When the first end 131 moves away from the limiting part 211, it drives the second end 132 to separate from the limiting part 211.

[0087] As shown in Figures 4, 8, and 11, as a preferred embodiment, the second end 132 is provided with an accommodating groove 1322, the first sliding groove 141 is fixedly provided with a fixing part 1411, which is a pin. The first sliding groove 141 is provided with a pin hole 1412, and the fixing part 1411 is fixedly placed inside the first sliding groove 141 through the pin hole 1412. The bottom of the groove that accommodates the groove 1322 is also provided with a long strip gap 13221. The size of the gap 13221 is determined based on the distance between the locking and unlocking stroke of the positioning part 13 and the limiting part 211. For example, if the width of the gap 13221 is selected to be greater than the diameter of the pin 1412, when the positioning part 13 moves between the first and second positions, it can move back and forth relative to the fixing part 1411 in the travel gap of the elongated gap 13221. Therefore, the positioning part 13 can achieve reciprocating movement in the first and second positions to lock or release the lifting platform 1. The resilient element 12 is a spring, which utilizes the biasing force of the resilient element 12 to promote the biased movement of the positioning part 13 towards the position of the limiting part 211. If one end of the resilient element 12 is fixed on the fixing part 1411, the other end of the resilient element 12 is abutted against the inner wall of the accommodating groove 1322 near the limiting part 211, and a force in the direction of the limiting part 211 is applied to the second end 132. There is also a spring installed on the unlocking element 11. When the unlocking element 11 moves downwards, the spring is compressed and applies an upward force to the unlocking element 11, making the rebound or redisposed effect of the positioning part 13 better. Of course, in other embodiments, there is no need to dispose springs on the unlocking element 11.

[0088] In this embodiment, the above-mentioned structural form is applied, and the fixing part 1411 is fixedly arranged in the first sliding groove 141. When the second end 132 moves away from the limiting part 211, the resilient element 12 between the fixing part 1411 and the accommodating groove 1322 is compressed, and a force towards the limiting part 211 is applied to the accommodating groove 1322 of the second end 132. Of course, in other embodiments, the accommodating groove 1322 can also run through the second end 132, meaning that the accommodating groove 1322 has no groove bottom, and at this time, the accommodating groove 1322 can also move relative to the pin 1411. In addition, if the accommodating groove 1322 has a groove bottom, and the fixing part 1411 is a convex block facing the opening side of the first sliding groove 141 towards the accommodating groove 1322, that is, the fixing part 1411 does not penetrate the positioning part 13, corresponding functions can also be achieved at this time.

[0089] As shown in Figure 11, as a preferred embodiment, the positioning part 13 comprises a connecting piece 133, with the first end 131 and the second end 132 connected through the connecting piece 133.

[0090] In this embodiment, the above-mentioned structural form is applied, and the connecting piece 133 has a thin thickness. The positioning part 13 has a large space between die first end 131 and the second end 132, which facilitates the up and down movement of the unlocking element 11.

[0091] This embodiment also provides a stroller, which comprises the above-mentioned stroller seat lifting apparatus.

[0092] In this embodiment, using the above structural form, when the unlocking element 11 does not apply a force to the second contact surface 1311 of the positioning part 13, the positioning part 13 tends to move towards the second position under the action of the resilient element 12. At this point, if the lifting platform 1 reaches the design height, the positioning part 13 and the limiting part 211 are in the same horizontal plane. Under the action of the resilient element 12, the positioning part 13 moves to the second position to cooperate with the limiting part 211, and the lifting platform 1 is locked vertically relative to the base 2. When unlocking element 11 applies a force to the second contact surface 1311 of the positioning part 13, the positioning part 13 moves towards the first position and separates from the limiting part 211. The lifting platform 1 can move freely in the vertical direction relative to the base 2. Due to the number of limiting parts 211 being more than 2 and being disposed vertically on the inner wall of chamber 21, lifting platform 1 can adjust the height by at least 2 gears. Due to the presence of chamber 21 in base 2, the lifting of lifting platform 1 is carried out inside chamber 21. The entire stroller seat lifting apparatus has no exposed rod body, which will not affect the normal folding of the stroller and can avoid safety hazards.

[0093] Although the specific embodiments of this invention are described above, those skilled in the art should understand that this is only an example, and the scope of protection of this invention is limited by the accompanying claims. Technicians in this field may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but these changes and modifications fall within the scope of protection of this invention.

Claims

1 .A stroller seat lifting apparatus for adjusting the height of a seat, wherein the stroller seat lifting apparatus comprises:a lifting platform, wherein the seat is disposed on the lifting platform, and the lifting platform is provided with an unlocking element, a resilient element, and a positioning part, the positioning part comprising a first and a second contact surface, and the positioning part being adapted to move between a first and second position, the resilient element being in contact with the first contact surface and being adapted to apply a force towards the second position of the positioning part, wherein one end of the unlocking element is in contact with the second contact surface and is adapted to apply a force towards the first position of the positioning part;a base being disposed on the frame, and the base being provided with a chamber, wherein the lifting platform can move up and down in the chamber and the inner wall of the chamber is provided with a limiting part in the vertical direction, the number of limiting parts being 2 or more;when the positioning part is in the second position, the lifting platform is locked with the base, and when the positioning part is in the first position, the lifting platform is unlocked with the base.

2. The stroller seat lifting apparatus according to claim 1, wherein the stroller seat lifting apparatus also includes a sleeve, and the seat is detachably disposed on the lifting platform through the sleeve.

3. The stroller seat lifting apparatus according to claim 2, wherein the lifting platform is provided with a clamping part, wherein the clamping part comprises a first and a second bayonet, wherein the first and second bayonetsare symmetrically disposed along the centerline of the lifting platfonn, and the sleeve is provided with a fitting part, which can be detachably clamped with the first or second bayonets.

4. The stroller seat lifting apparatus according to claim 2 or 3, wherein the sleeve is provided with a linkage element, which can transmit a force to the unlocking element.

5. The stroller seat lifting apparatus according to any preceding claim, wherein the lifting platform comprises a main body, wherein the main body is provided with a first sliding groove in the horizontal direction, and the positioning part is disposed within the first sliding groove and can extend from the main body.

6. The stroller seat lifting apparatus according to claim 5, wherein the outer wall of the main body is in contact with the inner wall of the chamber.

7. The stroller seat lifting apparatus according to claim 5 or claim 6, wherein the main body is provided with a second sliding groove in a vertical direction, the second sliding groove is connected to the first sliding groove, the unlocking element is disposed inside the second sliding groove, and the other end of the unlocking element extends out of the upper surface of the base.

8. The stroller seat lifting apparatus according to any one of claims 5 to 7, wherein the number of the positioning parts is two, and the two positioning parts are respectively disposed on both sides of the first sliding groove.

9. A stroller seat lifting apparatus according to any preceding claim, wherein the positioning part comprises a first end and a second end, wherein the first end is provided on the side away from the limiting part of the unlocking element, the second end is provided on the side close to the limiting part of the unlocking element, the second contact surface is inclined and disposed on the first end, and the end face of the unlocking element in contact with the secondcontact surface is inclined, and die second end is matched with the limiting part.

10. The stroller seat lifting apparatus according to claim 9, wherein the second end is provided with an accommodating groove, the first sliding groove is fixedly provided with a fixing part, and the fixing part is disposed inside the accommodating groove, when the positioning part moves between the first and second positions the accommodating groove can move relative to the fixing part; andone end of the resilient element is disposed on one side of the fixing part and the other end of the resilient element is abutted on the inner wall of the accommodating groove near the limiting part and is adapted to apply a force towards the limiting part towards the second end.

11. The stroller seat lifting apparatus according to claim 9 or 10, wherein the positioning part comprises a connecting piece, and the first end and the second end are connected through the connecting piece.

12. A stroller, wherein the stroller comprises a stroller seat lifting apparatus according to any one of claims 1 to 11.Application No: GB2409403.9Examiner:Edward RoseClaims searched: 1-12Date of search: 17 December 2024Patents Act 1977: Search Report under Section 17Documents considered to be relevant:Category Relevant to claims Identity of document and passage or figure of particular relevance X 1, 2, 5, 6, 8, 9, 11, 12 CN 219192311 U (NINGBO MYBABY BABY PRODUCTS MFG CO LTD) See Figures 4 and 6 in particular. Spring 43 forces position parts 41 A,B into engagement with locking holes 220. Pulling cable 45 raises unlocking member 42, which compresses spring 43 and retracts position parts 41A,B, thereby allowing heigh adjustment. X 1,12 US 2023 / 0099871 Al (ZHONG) Paragraph [0087] and Figs. 4 &5 disclose apparatus for raising a seat on a stroller, comprising unlock member 122, lock member 124, and spring 128 that forces protrusions 1240 into holes 1200 to lock the seat in specific positions. A US 2008 / 0296872 Al (SAVILLE et al.) Figure 7 shows an arrangement for adjusting the height of a stroller seat, comprising an unlocking element 204 captured in a plug 206, and positioning pins, also positioned in plug 206, that can extend through pairs of slots 194A-C. A US 2009 / 0033066 Al (SAVILLE et al.) Figure 7 shows an arrangement for adjusting the height of a stroller seat, comprising an unlocking element 204 captured in a plug 206, and positioning pins, also positioned in plug 206, that can extend through pairs of slots 194A-C. A - US 2010 / 0109272 Al (AHNERT et al.) Paragraph [0067] and Fig. 8 disclose a seat support 178 that can be locked in position by engaging a bolt 212 with notches 284A-C corresponding to different heights.Categories:X Document indicating lack of novelty or inventive step A Document indicating technological background and / or state of the art. Y Document indicating lack of inventive step if P Document published on or after the declared priority date but combined with one or more other documents of same category. before the filing date of this invention. & Member of the same patent family E Patent document published on or after, but with priority date earlier than, the filing date of this application.Field of Search:Search of GB, EP, WO &US patent documents classified in the following areas of the UKCX :Worldwide search of patent documents classified in the following areas of the IPC____________B62B_____________________________________________________The following online and other databases have been used in the preparation of this search reportSEARCH-PATENTInternational Classification:Subclass Subgroup Valid From B62B 0007 / 00 01 / 01 / 2006 B62B 0007 / 14 01 / 01 / 2006 B62B 0009 / 10 01 / 01 / 2006 B62B 0009 / 12 01 / 01 / 2006

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