Baby carrier with improved sliding mechanism

Abstract

The present application provides a baby carrier with improved sliding mechanism, which comprises a carrier body, a rail, a guide, and a positioning member. The rail is arranged on the carrier body. The sliding member is connected to the rail and can slide linearly. The sliding member is in rolling contact with the guide when it slides linearly relative to the rail, and is fixed at the position by the positioning member after it slides linearly relative to the rail. In this way, the guide is arranged to reduce the frictional resistance when the sliding member slides linearly relative to the rail, so that the sliding member can smoothly slide on the rail.

Description

Technical Field

[0001] This invention provides an infant and toddler vehicle, and more particularly an infant and toddler vehicle with an improved sliding mechanism. Background Technology

[0002] Infant and toddler vehicles, such as car seats installed in the back seat for infants to lie down or for toddlers to sit in, or strollers, cribs, and high chairs, often have sliding mechanisms, such as the armrests of strollers or the legs of cribs and high chairs. Regarding car seats, in addition to the traditional type that is fastened to the back seat by a seatbelt, some car seats have a support column on the front of the base and ISOFIX connector arms on both sides of the rear of the base. By hooking the connector arms into the ISOFIX slots on the back seat and extending the support column to stand on the footrest between the front and rear seats, the car seat can be quickly and securely positioned in the back seat.

[0003] However, the support column of the aforementioned base mainly consists of an outer tube and an inner tube that are connected internally and externally and can slide relative to each other. At this time, the surface of the inner tube is in close contact with the outer tube, resulting in sliding contact between the surfaces and generating significant frictional resistance when the inner tube slides. As a result, the inner tube is prone to jamming and its extension and retraction are not smooth when sliding. This situation not only occurs on the base of the aforementioned car seat, but also on the sliding mechanism of infant and toddler vehicles such as strollers, cribs, or high chairs. How to solve this problem is the main focus of this invention. Summary of the Invention

[0004] The inventor then devoted himself to research and development, and eventually developed an infant and toddler vehicle with an improved sliding mechanism, in order to achieve smooth sliding.

[0005] This invention provides an infant carrier with an improved sliding mechanism, comprising a carrier body, a track, a slider, a guide, and a positioning member. The track is disposed on the carrier body; the slider is connected to the track and can slide linearly relative to the track; the guide is disposed on one of the track and the slider, and the slider makes rolling contact with the guide when sliding linearly relative to the track; the positioning member is disposed between the track and the slider to fix the position of the slider after linear sliding relative to the track.

[0006] In a preferred embodiment, a support column is provided on the front side of the vehicle body, the rail is disposed on the support column, the sliding member is at least partially disposed in the rail, the rail has a tail end away from the base, and the rail has a through hole extending from the tail end, the sliding member has a connecting end and a backing end at opposite ends, the connecting end is provided with the guide slide and extends from the tail end into the through hole to connect to the outer tube, and the backing end protrudes from the outer tube.

[0007] In a preferred embodiment, the guide slide includes a fixed seat and a plurality of balls. The fixed seat is fixed to the receiving end and has a plurality of mounting grooves arranged around its circumference. The plurality of balls are mounted in the plurality of mounting grooves around the circumference of the fixed seat, and the receiving end contacts an inner wall of the outer tube with the plurality of balls rolling.

[0008] In a preferred embodiment, the fixing seat is integrally formed and has a connecting portion and a ring portion. The ring portion is located at one end of the connecting portion and protrudes laterally. The plurality of mounting grooves are provided along the periphery of the ring portion, and each mounting groove has an oil storage space reserved for installing each of the balls. The oil storage space is used to store lubricating oil to provide auxiliary lubrication when the installed balls roll and contact the inner wall.

[0009] In a preferred embodiment, the connecting portion and the connecting end are fixedly connected by a shaft member.

[0010] In a preferred embodiment, the tail end is provided with an end sleeve that extends into the through hole, so that the end sleeve blocks the connecting end in the through hole, so that the connecting end does not come out of the tail end of the rail member in the through hole.

[0011] In a preferred embodiment, the positioning member includes a tube seat and a fastener. The tube seat is fixed to the tail end, and the fastener is movably disposed on the tube seat. The sliding member has a plurality of fastening holes spaced apart along its length. When the sliding member adjusts its extension length relative to the rail member and slides linearly to the selected position, the fastener engages with the fastening hole at the corresponding position.

[0012] In a preferred embodiment, the fastener is pivotally connected to the tube seat via a shaft. The fastener has a fastening portion that can be fastened to each of the fastening holes respectively, and a lever portion located at a different position from the fastening portion. A reset elastic member is sleeved on the shaft, with one end abutting the tube seat and the other end abutting the lever portion. When the lever portion is levered, the reset elastic member is pressed to generate a reset elastic force. When the lever portion is released, it is pushed back by the reset elastic force to reset the fastening portion so as to fasten to the corresponding fastening hole.

[0013] In a preferred embodiment, the vehicle body has a bracket, and a rail is provided on each side of the bracket, and a sliding member is provided on each side of the bracket so as to slide relative to the bracket. The two sliding members are provided with an ISOFIX interface connecting arm at the same end, and each sliding member passes through the corresponding rail and can slide linearly.

[0014] In a preferred embodiment, each of the rail components is provided with a guide slide member, each of the guide slide members includes a fixed seat and a plurality of balls, the fixed seat is fixed inside the rail component, and the fixed seat has a plurality of mounting grooves evenly distributed on its side, the plurality of balls are respectively installed in each of the mounting grooves, and each rail component and an outer wall of the sliding member through which it passes are in rolling contact with the plurality of balls.

[0015] In a preferred embodiment, the two sliding members each have a plurality of limiting holes spaced apart along their length direction, and the positioning member is a stop pin provided for each of the sliding members. When each of the sliding members slides linearly to a selected position relative to the track through which it passes, the stop pin is inserted into the limiting hole at the corresponding position to block and position it.

[0016] In a preferred embodiment, the vehicle body has a bracket on its bottom side, the bracket has a pair of rails, the base has a support column on its front side, the support column has a pair of sliding members, the pair of sliding members are sleeved on the pair of rails and can slide linearly.

[0017] In a preferred embodiment, each of the rail components is provided with a guide slide member, each of the guide slide members includes a fixed seat and a plurality of balls. The fixed seat is elongated and fixed to the provided rail component, and the fixed seat has a plurality of mounting grooves arranged in a straight line along its side. The plurality of balls are respectively installed in each of the mounting grooves, and each rail component and an inner wall of the sleeved slide member are in rolling contact with the plurality of balls.

[0018] Therefore, the infant carrier of the present invention improves the sliding mechanism, that is, when the sliding member slides linearly relative to the track member, it makes rolling contact with the guide member, which can effectively reduce the resistance generated by friction between the sliding member and the track member, thereby achieving the effect of the sliding member sliding smoothly on the track member. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a safety seat according to a specific embodiment of the present invention.

[0021] Figure 2 This is a partial exploded view of the first embodiment of the sliding mechanism of the present invention.

[0022] Figure 3 for Figure 1 Cross-sectional structural diagram as seen at section 3-3.

[0023] Figure 4 for Figure 1 Cross-sectional structural diagram as seen at section line 4-4.

[0024] Figure 5 This is a schematic diagram of the extension and retraction of the support column in the first embodiment of the sliding mechanism of the present invention.

[0025] Figure 6 This is a perspective view of the second and third sliding mechanisms of a specific embodiment of the present invention located on the bottom side of the base.

[0026] Figure 7 This is an exploded view of the second sliding mechanism embodiment of the present invention.

[0027] Figure 8 This is a cross-sectional view of the second embodiment of the sliding mechanism of the present invention.

[0028] Figure 9 This is a schematic diagram showing the support column and connecting arm extending relative to the base in a specific embodiment of the present invention.

[0029] Figure 10 This is an exploded view of the third embodiment of the sliding mechanism of the present invention.

[0030] Figure 11 for Figure 6 A schematic diagram of the cross-sectional structure as seen at section 11-11.

[0031] Figure 12 for Figure 9 A schematic diagram showing how the support column extends relative to the base and is blocked by a snap fastener.

[0032] Figure 13 for Figure 12 A partial cross-sectional view as seen along section line 13-13.

[0033] Figure 14 This is a perspective view of another embodiment of the present invention, which is a trolley.

[0034] Figure 15 This is a perspective view of another embodiment of the present invention, namely a baby crib.

[0035] Figure 16 This is a perspective view of another embodiment of the present invention, namely a dining chair.

[0036] Figure label:

[0037] 1. Child seat

[0038] 2. Base

[0039] 3 Support Columns

[0040] 31 outer tube

[0041] 311 Tail end

[0042] 312 Through Hole

[0043] 313 Inner Wall

[0044] 32 Inner tube

[0045] 321 Connection Terminal

[0046] 322 near the end

[0047] 323 snap-fit ​​hole

[0048] 33 Fixed base

[0049] 331 mounting slot

[0050] 331a Oil storage space

[0051] 332 Joint

[0052] 333 Ring Section

[0053] 34 ball bearings

[0054] 35 shaft

[0055] 36-end sleeve

[0056] 37 tube seat

[0057] 38 Fasteners

[0058] 381 Fastening part

[0059] 382 Actuating Part

[0060] 39 Shaft components

[0061] 30 Reset elastic element

[0062] 4 Connecting Arms

[0063] 41 Guide sleeve

[0064] 42 Sliding tube

[0065] 421 outer wall

[0066] 422 Limiting hole

[0067] 43 Fixture

[0068] 431 Mounting Slot

[0069] 44 Ball bearings

[0070] 45 stop pin

[0071] 46-link

[0072] 5 supports

[0073] 51. Front Section

[0074] 52 Fixture

[0075] 521 mounting slot

[0076] 53 Ball bearings

[0077] 6. Sliding sleeve

[0078] 61 Inner wall

[0079] 62 Fasteners

[0080] 621 Compression Spring

[0081] 63. Tension Spring

[0082] 7. Stroller

[0083] 71 outer tube

[0084] 72 Inner Tube

[0085] 8. Baby crib

[0086] 81 outer tube

[0087] 82 Inner Tube

[0088] 9 Dining chairs

[0089] 91 outer tube

[0090] 92 Inner Tube Detailed Implementation

[0091] This invention provides an infant carrier with an improved sliding mechanism, comprising a carrier body, a track, a slider, a guide, and a positioning member. The track is disposed on the carrier body and can be fixed or movable. The slider is connected to the track and can slide linearly relative to the track. The guide is disposed on one of the track and the slider, and the slider makes rolling contact with the guide when sliding linearly relative to the track. The positioning member is disposed between the track and the slider to fix the position of the slider after linear sliding relative to the track.

[0092] The present invention relates to an improved infant and toddler carrier with a sliding mechanism, which broadly refers to carriers suitable for use by infants and toddlers, such as car seats, strollers, cribs, or high chairs, all of which fall within the scope of the infant and toddler carriers described in this invention, as will be stated below. To fully understand the purpose, features, and effects of this invention, a car seat is used as a specific embodiment, and the invention will be described in detail below with reference to the accompanying drawings:

[0093] Please refer to the following first. Figure 1 As shown, in this embodiment, the vehicle body is the base 2 of the safety seat 1. The base 2 has a support column 3 on its front side, and the base 1 has ISOFIX interface connecting arms 4 on both rear sides. The base 2 also has a bracket 5 on its bottom side (e.g., Figure 6 (As shown). The safety seat 1 described in this embodiment can be placed in the rear seat of a car (not shown in the figure) along with the base 2. At this time, the two connecting arms 4 can extend from the base 2 to lock into the ISOFIX interface slots on the rear seat of the car (not shown in the figure), and the support column 3 can be extended to stand on the footrest between the front and rear seats of the car, thus positioning the safety seat 1 in the rear seat of the car. Regarding the safety seat 1 of this specific embodiment, the base 2 has three sets of sliding mechanisms, including a first set of sliding mechanisms in which the support column 3 itself can extend and retract, a second set of sliding mechanisms in which the connecting arms 4 can extend and retract relative to the base 2, and a third set of sliding mechanisms in which the support column 3 can extend and retract relative to the base 2. These sliding mechanisms are embodiments of this invention and will be further described below.

[0094] Example of the first sliding mechanism:

[0095] like Figures 2 to 5As shown, this is an embodiment of the first set of sliding mechanisms. The support column 3 includes an outer tube 31 and an inner tube 32. In this embodiment, the outer tube 31 serves as the rail and the inner tube 32 as the sliding element. The outer tube 31 has a tail end 311, which is located away from the base 2. The outer tube 31 has a through hole 312, which extends from the tail end 311 into the outer tube 31. The inner tube 32 has a connecting end 321 and an abutting end 322 at opposite ends. The connecting end 321 is equipped with the guide element and extends from the tail end 311 into the through hole 312 to connect to the outer tube 31 (e.g., ...). Figure 3 , 4 As shown), the inner tube 32 is at least partially disposed inside the outer tube 31, while the end 322 protrudes from the outer tube 31 (as shown). Figure 5 (As shown).

[0096] In the embodiment of the first set of sliding mechanisms, the guide slide includes a fixed seat 33 and a plurality of balls 34. The fixed seat 33 is a receiving end 321 fixedly mounted on the inner tube 32, and the fixed seat 33 has a plurality of mounting grooves 331, which are arranged around the circumference of the fixed seat 33 (e.g., ...). Figure 2 As shown), multiple balls 34 are installed in mounting slots 331 along the circumference of the fixed base 33. Each ball 34 can rotate freely in its mounting slot 331. When the connecting end 321 extends from the tail end 311 into the through hole 312 to connect to the outer tube 31, the connecting end 321 makes rolling contact with an inner wall 313 of the outer tube 31 using multiple balls 34. The inner tube 32 slides linearly relative to the outer tube 31 as it expands and contracts (as shown). Figure 5 As shown, when the inner tube 32 extends relative to the outer tube 31 and stands on the footrest between the front and rear seats of the car, or when it is not in use and retracts relative to the outer tube 31, the inner tube 32 achieves smooth sliding by rolling friction between multiple balls 34 and the inner wall 313 of the outer tube 31.

[0097] Continuing from the above, the fixing base 33 in this embodiment, as... Figure 2 , 3 As shown, it is integrally formed and has a connecting portion 332 and a ring portion 333. In this embodiment, the connecting portion 332 is fixed to the connecting end 321 by a shaft member 35 passing through it. The ring portion 333 is located at one end of the connecting portion 332 and protrudes laterally toward the connecting portion 332. The mounting groove 331 is provided along the periphery of the ring portion 333. Each mounting groove 331 in this embodiment has an oil storage space 331a (e.g., ...). Figure 3As shown, the oil storage space 331a is used to store pre-filled lubricating oil, thereby providing auxiliary lubrication when the multiple balls 34 roll in contact with the inner wall 313. In addition, in this embodiment, an end sleeve 36 is provided at the tail end 311 of the outer tube 31, which extends into the through hole 312. The end sleeve 36 blocks the connecting end 321 in the through hole 312, so that the connecting end 321 does not come out of the tail end 311 of the outer tube 31 in the through hole 312.

[0098] In an embodiment of the first set of sliding mechanisms, the positioning element includes a tube seat 37 and a fastener 38, such as Figure 2 , 4 As shown, the tube seat 37 is fixed to the tail end 311 of the outer tube 31, while the fastener 38 is movably disposed on the tube seat 37; the inner tube 32 has multiple fastening holes 323, which are spaced apart along the length of the inner tube 32. When the inner tube 32 adjusts its extension length relative to the outer tube 31 and slides linearly to the selected position, the fastener 38 engages with the corresponding fastening hole 323, and the inner tube 32 can then be fixed at the selected position with its extension length from the outer tube 31.

[0099] As described above, in this embodiment, the fastener 38 is pivotally connected to the tube seat 37 via a shaft 39. Therefore, the fastener 38 can pivot around the shaft 39. The fastener 38 has a fastening portion 381 and a lever portion 382. The fastening portion 381 can be engaged with each corresponding fastening hole 323. The lever portion 382 is positioned differently from the fastening portion 381. In this embodiment, a return elastic member 30 is sleeved on the shaft 39. This return elastic member 30 is a torsion spring. One end of the return elastic member 30 abuts against the tube seat 37, and the other end abuts against the lever portion 382. When the lever portion 382 is actuated, the return elastic member 30 is compressed, generating a return force. When the lever portion 382 is released, it is pushed back by the return force, causing the fastening portion 381 to reset and engage with the corresponding fastening hole 323.

[0100] Example of the second sliding mechanism:

[0101] For example Figures 6 to 8 As shown, this is an embodiment of the second set of sliding mechanisms. A guide sleeve 41 and a sliding tube 42 are respectively provided on both sides of the bracket 5. In this embodiment, the guide sleeve 41 serves as the guide element, and the sliding tube 42 serves as the sliding element. The two sliding tubes 42 each have an ISOFIX interface connecting arm 4 at the same end. Each sliding tube 42 passes through the corresponding guide sleeve 41 and can slide linearly. Figure 7 , 8As shown, each guide sleeve 41 is provided with a guide slide member. In this embodiment, each guide slide member includes a fixed seat 43 and a plurality of balls 44. The fixed seat 43 is fixed inside the provided guide sleeve 41, and the fixed seat 43 has a plurality of mounting grooves 431 evenly distributed on its side. The plurality of balls 44 are respectively installed in each mounting groove 431. Each guide sleeve 41 and the outer wall 421 of the sliding tube 42 through which it passes are in rolling contact with the plurality of balls 44. When the sliding tube 42 slides linearly relative to the guide sleeve 41, that is, when the sliding tube 42 extends relative to the guide sleeve 41, the connecting arm 4 at one end of it engages with the slot of the same ISOFIX interface on the rear seat of the car (e.g., Figure 9 As shown), or when not in use and retracted relative to the guide sleeve 41, the outer wall 421 of the sliding tube 42 rolls against the guide sleeve 41 through the ball bearings 44 to achieve smooth sliding.

[0102] In the embodiment of the second sliding mechanism, each of the two sliding tubes 42 has multiple limiting holes 422, which are spaced apart along their length. The positioning element in this embodiment is a stop pin 45 corresponding to each sliding tube 42. When each sliding tube 42 slides linearly relative to the guide sleeve 41 to a selected position—for example, when the two sliding tubes 42 slide linearly and the connecting arm 4 extends, or when the two sliding tubes slide linearly and the connecting arm retracts—the stop pin 45 can be inserted into the corresponding limiting hole 422 to prevent the positioning sliding tube 42 from being positioned at the selected position. Furthermore, in this embodiment, the two sliding tubes 42 are connected by a connecting rod 46 (e.g., ...). Figure 6 (As shown) can slide linearly synchronously, and the connecting rod 46 is slidably mounted on the bracket 5.

[0103] Example of the third sliding mechanism:

[0104] like Figures 10 to 13 As shown, this is an embodiment of the third sliding mechanism. The bracket 5 has a pair of front sections 51, and the support column 3 has a pair of sliding sleeves 6. In this embodiment, the front sections 51 of the bracket 5 serve as the guide members, and the sliding sleeves 6 of the support column 3 serve as the sliding members. The pair of sliding sleeves 6 are fitted onto the pair of front sections 51 and can slide linearly. Each front section 51 is provided with a guide member. In this embodiment, each guide member includes a fixed seat 52 and multiple balls 53. The fixed seat 52 is elongated and fixed to the provided front section 51, and the fixed seat 52 generally has a U-shaped cross-section. The fixed seat 52 also has multiple mounting grooves 521. In this embodiment, these mounting grooves 521 are arranged linearly along the side of the bottom side of the fixed seat 52. The multiple balls 53 are respectively installed in each mounting groove 521. Each front section 51 and the inner wall 61 of the fitted sliding sleeve 6 and the multiple balls 53 are in rolling contact on the bottom side of the fixed seat 52 (e.g., ...). Figure 11(As shown). When the pair of sliding sleeves 6 slides linearly relative to the pair of front sections 51 on which they are fitted, that is, when the support column 3 extends relative to the base 2 during use (as shown). Figure 9 As shown, when not in use, the inner wall 61 of the sliding sleeve 6 retracts relative to the base 2, and the sliding sleeve 6 achieves smooth sliding by rolling friction between the inner wall 61 and the front section 51 through multiple balls 53. However, the present invention is not limited to the multiple balls 53 being installed only on the bottom side of the fixed base 52. The purpose is to reduce resistance and make the sliding smooth when the sliding sleeve 6 slides linearly relative to the front section 51. However, in different embodiments, multiple mounting grooves 521 may also be arranged in a straight line along the top and bottom sides of the fixed base 52 and each of them is equipped with balls 53 (not shown in the figure), so as to make the linear sliding of the sliding sleeve 6 relative to the front section 51 smoother.

[0105] In the embodiment of the third set of sliding mechanisms, such as Figure 10 , 12 As shown, the positioning component includes a latching element 62 and a pair of tension springs 63. The latching element 62 is mounted on the support column 3 and is supported by a compression spring 621, so it is normally in a raised position (as shown). Figure 13 As shown, the pair of tension springs 63 are respectively located on both sides of the two sliding sleeves 6. Each tension spring 63 has one end fixed to the bottom side of the base 2 and the other end fixed to the sliding sleeve 6. When the support column 3 extends outward with each sliding sleeve 6 relative to each front section 51 and the buckle 62 is raised, the buckle 62 forms a block on the side of the base 2 and is positioned. At this time, the tension spring 63 is also in a stretched state. When the buckle 62 is pressed and disengaged from the block on the base 2, the support column 3 is retracted towards the base 2 by the restoring force of the tension spring 63.

[0106] The infant and toddler carrier of the present invention improves the sliding mechanism by setting guide slides between the track and the sliding member in each sliding mechanism. This effectively reduces the resistance generated by friction when the sliding member slides linearly relative to the track. Compared with the existing sliding mechanism of infant and toddler carriers, it solves the problem of uneven extension and contraction caused by the sliding mechanism simply sliding on the surface to the surface, thus achieving the effect of smooth sliding of the sliding member on the set track.

[0107] Although the present invention uses a child safety seat 1 as a specific embodiment and describes the implementation of the first, second, and third sets of sliding mechanisms in detail in the above embodiments, the present invention is not limited to the sliding mechanism of the child safety seat 1. The present invention can also be applied to the sliding mechanisms of different infant and toddler vehicles, for example... Figure 14 The telescopic handle of the trolley 7 shown includes an outer tube 71 and an inner tube 72, with the outer tube 71 serving as the rail and the inner tube 72 serving as the sliding element; for example... Figure 15 The telescopic legs of the crib 8 shown include an outer tube 81 and an inner tube 82, with the outer tube 81 serving as the track and the inner tube 82 serving as the sliding element; for example... Figure 16 The telescopic legs of the high chair 9 shown include an outer tube 91 and an inner tube 92. The outer tube 91 serves as the rail and the inner tube 92 serves as the sliding member. These infant and toddler carriers can have guide members provided between the rail and the sliding member. For example, as in the first sliding mechanism described above, a fixed seat 33 and multiple ball bearings 34 are provided between the outer tube 31 and the inner tube 32 to achieve smooth sliding. All such infant and toddler carriers are within the scope of protection of this invention.

[0108] The present invention has been disclosed above with reference to preferred embodiments. However, those skilled in the art should understand that the embodiments are merely illustrative of the invention and should not be construed as limiting its scope. It should be noted that all variations and substitutions equivalent to the described embodiments should be considered within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims.

Claims

1. A child carrier with an improved sliding mechanism, characterized in that, Include: One vehicle body; A track component, which is disposed on the vehicle body; A sliding member is connected to the rail member and can slide linearly relative to the rail member; A guide member is disposed on one of the rail member and the sliding member, wherein the sliding member makes rolling contact with the guide member when sliding linearly relative to the rail member; and A positioning element is disposed between the rail and the sliding element to fix the position of the sliding element after it has slid linearly relative to the rail. A support column is provided on the front side of the vehicle body, the rail is disposed on the support column, and the sliding member is at least partially disposed in the rail. The rail has a tail end away from the vehicle body, and a through hole is provided in the rail through the tail end. The sliding member has a connecting end and a backing end at opposite ends. The connecting end is provided with the guide slide and extends from the tail end into the through hole to connect with the rail. The backing end is exposed in the rail. The guide slide includes a fixed seat and a plurality of balls. The fixed seat is fixed to the receiving end and has a plurality of mounting grooves arranged around its circumference. The plurality of balls are mounted in the plurality of mounting grooves around the circumference of the fixed seat. The receiving end makes rolling contact with an inner wall of the rail component with the plurality of balls. The fixing seat is integrally formed and has a connecting part and a ring part. The ring part is located at one end of the connecting part and protrudes laterally. The plurality of mounting grooves are provided along the periphery of the ring part, and each mounting groove includes an oil storage space for storing lubricating oil to provide auxiliary lubrication when the mounted balls roll in contact with the inner wall.

2. The infant carrier with an improved sliding mechanism according to claim 1, characterized in that, The joint and the connecting end are fixedly connected by a shaft.

3. The infant carrier with an improved sliding mechanism according to claim 2, characterized in that, The tail end is provided with an end sleeve that extends into the through hole, so that the end sleeve blocks the connecting end in the through hole, so that the connecting end does not come out of the tail end of the rail component in the through hole.

4. The infant carrier with an improved sliding mechanism according to claim 1, characterized in that, The positioning component includes a tube base and a fastener. The tube base is fixed to the tail end, and the fastener is movably disposed on the tube base. The sliding component has a plurality of fastening holes spaced apart along its length. When the sliding component adjusts its extension length relative to the rail component and slides linearly to the selected position, the fastener engages with the fastening hole at the corresponding position.

5. The infant carrier with an improved sliding mechanism according to claim 4, characterized in that, The fastener is pivotally connected to the tube seat via a shaft. The fastener has a fastening part that can be fastened to each of the fastening holes respectively, and a lever part that is located differently from the fastening part. A reset elastic member is sleeved on the shaft, with one end abutting the tube seat and the other end abutting the lever part. When the lever part is levered, the reset elastic member is pressed to generate a reset elastic force. When the lever part is released, it is pushed back by the reset elastic force to reset the fastening part so that it fastens to the corresponding fastening hole.

6. The infant carrier with an improved sliding mechanism according to claim 1, characterized in that, The vehicle body has a bracket, and a guide sleeve is provided on each side of the bracket. A sliding tube is provided on each side of the bracket so that it can slide relative to the bracket. The two sliding tubes are provided with an ISOFIX interface connecting arm at the same end. Each sliding tube passes through the corresponding guide sleeve so that it can slide linearly.

7. The infant carrier with an improved sliding mechanism according to claim 6, characterized in that, Each of the guide sleeves is provided with a guide slide member, each of the guide slide members includes a fixed seat and a plurality of balls. The fixed seat is fixed inside the provided guide sleeve, and the fixed seat has a plurality of mounting grooves evenly distributed on its side. The plurality of balls are respectively installed in each of the mounting grooves. Each of the guide sleeves and an outer wall of the sliding tube through which it passes are in rolling contact with the plurality of balls.

8. The infant carrier with an improved sliding mechanism according to claim 7, characterized in that, The two sliding tubes each have a plurality of limiting holes spaced apart along their length. The positioning element is a stop pin provided for each of the sliding tubes. When each of the sliding tubes slides linearly to a selected position relative to the guide sleeve through which it passes, the stop pin is inserted into the limiting hole at the corresponding position to block and position it.

9. The infant carrier with an improved sliding mechanism according to claim 1, characterized in that, The vehicle body has a bracket on its bottom side, the bracket has a pair of front sections, and the support column has a pair of sliding sleeves, which are fitted onto the pair of front sections and can slide linearly.

10. The infant carrier with an improved sliding mechanism according to claim 9, characterized in that, Each of the aforementioned front sections is provided with a guide slide member, each of the aforementioned guide slide members includes a fixed seat and a plurality of balls. The fixed seat is elongated and fixed to the provided front section, and the fixed seat has a plurality of mounting grooves arranged in a straight line along its side. The plurality of balls are respectively installed in each of the mounting grooves, and each of the aforementioned front sections and an inner wall of the sleeve to which it is fitted are in rolling contact with the plurality of balls.

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