TWI617473B - Easy to change the baby carriage - Google Patents

Abstract

The invention relates to a baby stroller which is easy to change and install a baby seat. The baby seat has two clips. The baby stroller includes a frame unit, two joint units, two pivot joint units and two connection units. Each joint unit includes a first pivot base and a second pivot base fixed between a front frame rod and a side frame rod of the frame unit, and the first pivot base and the second pivot base are pivotally connected to each other. It can rotate relative to one axis. Each pivoting unit includes a pivot shaft passing between the first pivot base and the second pivot base along the axis. The pivot shaft has a polygonal insert extending along the axis. Hole, each connection unit includes a fastener for engaging or disengaging with a corresponding fastener, and a polygonal latch provided in the fastener and inserted into a corresponding polygonal jack, and the The fastener is adjacent to the inner pivot ear and away from the outer pivot ear. Therefore, the baby carriage can be easily and conveniently assembled with baby seats of different specifications.

Description

Easy to change the baby carriage

The present invention relates to a baby carriage, and more particularly to a baby carriage which is easy to change and install a baby seat.

1 to 3, TW I396643 discloses a mounting mechanism 20 capable of detachably mounting a baby seat 10 on a stroller 11. The mounting mechanism 20 includes a mounting mechanism for mounting the stroller. 11 is a fastening kit 21 of a tube body 111 and a bracket 25 pivotally disposed on the fastening kit 21. The fastening kit 21 has a first sleeve body 22 and a second sleeve body 23 that can cooperate to surround the tube body 111, and a first sleeve body 21 and a second sleeve body 23 that pass through the first sleeve body 21 and the second sleeve body 23. The first sleeve pin 24 between the first sleeve body 22 has a fastener 221 that can be engaged with the protruding portion 231 of the second sleeve body 23 so that the first sleeve body 22 and the second sleeve The cylinder 23 generates a lock and is positioned on the pipe body 111. The bracket 25 has an elbow end portion 251. A bracket front end portion 252 and a bracket rear end portion 253 are bounded by the elbow end portion 251. A notch 254 provided at the front end portion 252 of the bracket for engaging the baby seat 10, and two flanges 255 provided at the rear end portion 253 of the bracket and spaced apart from each other. A protruding portion 231 of the two sleeve bodies 23 is further inserted between the two flanges 255 and the protruding portion 231, so that the bracket 25 can rotate relative to the second sleeve body 23. Although the baby seat 10 can be assembled or disassembled by the mounting mechanism 20, the following problems exist:

1. The mounting mechanism 20 includes the fastening kit 21 and the bracket 25. The fastening kit 21 has the first sleeve body 22 and the second sleeve body 23 which can rotate relative to each other and can be locked to each other. The bracket 25 is rotatable relative to the second sleeve body 23. The overall structure is relatively complicated and the manufacturing cost is high.

2. The baby seat 10 can be assembled on the stroller 11 through the bracket 25, so to replace the baby seat 10 of different specifications, the bracket 25 must be replaced, that is, the installation must be replaced. Mechanism 20, because the mounting mechanism 20 is positioned on the pipe body 111 by the first sleeve body 22 and the second sleeve body 23 generating a lock, therefore, the fastener 221 must be pulled to release the lock Only when the protruding portion 231 is engaged can the mounting mechanism 20 be removed from the pipe body 111, and there is a problem that it is inconvenient to change and assemble the mounting mechanism 20 and the baby seat 10 of different specifications.

Therefore, the object of the present invention is to provide a stroller with a simple overall structure, which can reduce the production cost, and can easily change the installation of the buckle seat for the assembly of baby seats of different specifications.

Therefore, the baby carriage of the present invention is suitable for being assembled or separated from a baby seat. The baby seat has two clips. The baby carriage includes a frame unit, two joint units, two pivot joint units, and two connection units. .

The frame unit includes a front wheel frame, a rear wheel frame, a hand push frame and two links. The front wheel frame has two front frame rods. The hand push frame has two side frame rods and a hand connected to the two side frame rods. A push rod, the two side frame rods are respectively pivotally connected to the top of the two front frame rods, the rear wheel frame and the two links are connected between the two front frame rods and the two side frame rods; the two joint units are respectively Installed between the two front frame rods and the two side frame rods, each joint unit includes a first pivot base and a second pivot installed between the top of the front frame rod and the bottom of the side frame rod. Seat, the first pivot seat has an outer pivot ear and an inner pivot ear spaced apart from each other and sleeved outside the second pivot seat, and the first pivot seat and the second pivot seat are pivotally connected to each other and can run around an axis Relative rotation; the two pivoting units are respectively installed on the two joint units, and each pivoting unit includes a pivot shaft that passes between the first pivot base and the second pivot base along the axis, and the pivot shaft has A polygonal jack extending along the axis; the two connecting units are respectively installed on the two pivoting units, and each connecting unit includes a The corresponding fastener is a fastener that is engaged or disengaged, and a polygonal latch that is disposed in the fastener and inserted into the corresponding polygonal jack, and the fastener is adjacent to the inner pivot ear and away from the outer pivot. ear.

The effect of the present invention is that the fastener can be positioned on the stroller through the cooperation of the outer corner jack and the polygonal latch, and the polygonal latch can fix fasteners of different specifications, so that the stroller It can be easily assembled with different specifications of baby seats, and the structure is quite simple, which can reduce production costs.

The present invention is described in detail below with reference to the drawings and embodiments. Before the present invention is described in detail, it should be noted that the relative position terms used in the following description, such as "front", "rear", "top", "top" "Bottom" is based on the orientation shown in each figure and the normal use orientation, and similar components are represented by the same number.

Referring to FIGS. 4 to 6, the baby carriage 3 of the present invention can be assembled or disassembled from a baby seat 70. The baby seat 70 has two fasteners 71. The first embodiment of the baby carriage 3 includes a frame unit 30. , Two joint units 40, two pivot joint units 50, and two connection units 60.

The frame unit 30 includes a front wheel frame 31, a rear wheel frame 32, a hand push frame 33, and two connecting rods 34. The front wheel frame 31 is generally U-shaped and has two front frame rods 311. The rear wheel frame 32 is generally The U-shaped frame has two rear frame rods 321. The hand-push frame 33 is generally U-shaped, and has two side frame rods 331 and a hand-push rod 332 connected to the two side frame rods 331. The two side frame rods 331 respectively Pivotally connected to the top of the two front frame rods 311, the two rear frame rods 321 and the two links 34 are connected between the two front frame rods 311 and the two side frame rods 331, thereby forming a link mechanism so that Interlocking with each other allows the frame unit 30 to be unfolded or collapsed.

The two joint units 40 are respectively installed between the two front frame rods 311 and the two side frame rods 331. Each joint unit 40 includes a portion fixed between the bottom of the corresponding side frame rod 331 and the top of the front frame rod 311. A first pivot base 41 and a second pivot base 42, and the first pivot base 41 and the second pivot base 42 are pivotally connected to each other and can be relatively rotated around an axis I, and the first pivot base 41 is mounted on the The side frame rod 331 has a set of a first sleeve 411 fixed outside the bottom of the side frame rod 331, and an outer pivot ear 412 and an inner pivot ear 413 extending from the first sleeve 411 and spaced apart from each other. The second pivot base 42 is mounted on the front frame rod 311 and has a set of a second sleeve 421 fixed to the top of the front frame rod 311, and a second sleeve 421 extending from the second sleeve 421 and located on the front frame rod 311. It is easy to understand that the pivot block 422 between the outer pivot ear 412 and the inner pivot ear 413 can also be installed on the front frame lever 311 and the second pivot base 42 on the side.架 杆 331.

The two pivoting units 50 are respectively mounted on the two joint units 40, and each of the pivoting units 50 includes a pivot shaft 51 passing through the first pivot base 41 and the second pivot base 42 along the axis I. And a nut 52, the pivot shaft 51 has a shaft body 511 sequentially inserted between the outer pivot ear 412, the pivot block 422 and the inner pivot ear 413, and is disposed on the shaft body 511 and is A convex ring 512 blocked by the outer pivot ear 412, a threaded section 513 provided on the shaft body 511 and away from the convex ring 512, and a polygonal socket 514 extending from the shaft body 511 to the convex ring 512 along the axis I When the shaft body 511 is sequentially inserted into the outer pivot ear 412, the pivot block 422, and the inner pivot ear 413, and then the nut 52 is screwed to the thread section 513 and blocked by the inner pivot ear 412, The pivot 51 can be restricted between the outer pivot 412 and the inner pivot 413, and the first pivot 41 and the second pivot 42 can be pivoted around the axis by using the pivot 51 as a supporting shaft Ⅰ Relative rotation.

The two connecting units 60 are respectively connected to the two pivoting units 50. Each connecting unit 60 includes a fastening member 61 for engaging with or detaching from a corresponding fastening member 71, and a fastening member 61 provided on the fastening member. The member 61 is also inserted into the polygonal pin 62 in the corresponding polygonal socket 514, and the fastening member 61 is adjacent to the inner pivot ear 413 and away from the outer pivot ear 412.

The fastener 61 has a socket 611 seated on the joint unit 40, and a connecting block 612 extending from the socket 611 and abutting the inner pivot ear 413. The polygonal pin 62 is fixed to the connecting block 612. The socket 611 is used for engaging with or disengaging with the buckling member 71. When the polygonal pin 62 is inserted into the polygonal socket 514, the polygonal pin 62 is restricted from turning and the buckling member 61 is positioned. .

According to the present invention, the buckle 71 and the socket 611 of the fastener 61 can form a lock. The buckle 71 is usually installed in the baby seat 70, and the socket 611 is installed in a car seat. The baby seat 70 can be assembled and positioned on the car seat, and the lock composed of the buckle 71 and the socket 611 is a commercially available product, which can be a Britax series lock shown in FIG. 4 and shown in FIG. 9 The GMP series lock buckle and the EW series lock buckle shown in FIG. 11, because the lock buckle is not a feature of the present invention, its detailed structure is not described in detail.

In use, when the buckle 71 of the baby seat 70 is inserted into the socket 611 to be snap-fitted to each other, the assembling operation of the baby seat 70 and the stroller 3 is completed, and the gravity energy of the baby seat 70 A downward pressure toward the bottom end of the two connection units 60 and an outward thrust from the inner pivot ear 413 toward the outer pivot ear 412 are generated, thereby effectively increasing the stabilization effect of the two connection units 60, and also improving the The stability and safety of the baby seat 70.

It is easy to understand that the setting position of the polygonal pin 62 and the polygonal jack 514 can be interchanged. Referring to FIGS. 7 and 8, the polygonal pin 62 is fixed to the pivot 51 and extends along the axis I. The inner pivot ear 413 is protruded, and a corresponding polygonal socket 613 is provided in the connecting block 612 of the fastener 61. In this way, the polygon socket 613 is sleeved outside the polygonal pin 62, and the fastener can also be made. 61 positioning and can produce the same effect.

Referring to FIG. 9 and FIG. 10, a second embodiment of the baby carriage 3 of the present invention can be assembled or disassembled from a baby seat 72 of different specifications. The baby seat 72 has two fasteners 73. The first embodiment is the same and includes a frame unit 30, a two-joint unit 40, two pivot joint units 50, and two connection units 63. The frame unit 30 of the second embodiment also includes a front wheel frame 31 and a rear wheel. The frame 32, the one-hand push frame 33, and the two connecting rods 34. Each joint unit 40 also includes a first pivot seat which is fixed between the bottom of the corresponding side frame rod 331 and the top of the front frame rod 311 and is relatively rotatable. 41 and a second pivot base 42, each pivoting unit 50 also includes a pivot shaft 51 passing between the first pivot base 41 and the second pivot base 42 along the axis I, and a nut 52 Each connecting unit 63 also includes a fastener 64 and a polygonal latch 65 fixedly inserted in the fastener 64 and inserted into the corresponding polygonal socket 514. The fastener 64 also has a socket 641 and A connection block 642. The difference between the second embodiment and the first embodiment is only that: the socket 641 of the fastener 64 and the fastener 611 of the socket member 61 of different specifications, thus, with the infant seat 73 of the catch 72 from binding or snap.

When the buckle 73 of the baby seat 72 is inserted into the socket 641 to snap-fit each other, the assembling operation of the baby seat 72 and the stroller 3 is completed, and the gravity of the baby seat 72 can The connection unit 63 generates a downward pressure toward the bottom end and an outward thrust force from the inner pivot ear 413 toward the outer pivot ear 412, thereby effectively increasing the stabilization effect of the two connection units 63 and improving the baby seat. 72's stability and safety.

Referring to FIGS. 11 to 13, a third embodiment of the baby carriage 3 of the present invention can be assembled or disassembled with a baby seat 74 of different specifications. The baby seat 74 has two fasteners 75. The third embodiment is similar to the third embodiment. The first embodiment is the same and includes a frame unit 30, a two-joint unit 40, two pivot joint units 50, and two connection units 66. The frame unit 30 of the third embodiment also includes a front wheel frame 31 and a rear wheel. The frame 32, the one-hand push frame 33, and the two connecting rods 34. Each joint unit 40 also includes a first pivot that is fixed between the bottom of the corresponding side frame rod 331 and the top of the front frame rod 311 and can be relatively rotated. The seat 41 and a second pivot seat 42 each of which also includes a pivot shaft 51 passing between the first pivot seat 41 and the second pivot seat 42 along the axis I, and a nut 52. Each connection unit 66 also includes a fastening member 67 and a polygonal pin 68 fixed in the fastening member 67 and inserted into the corresponding polygonal socket 514. The third embodiment and the first embodiment The only difference is that the fastener 67 has a card for engaging with or disengaging with the fastener 75 of the baby seat 74. 671 bar, a profiled inner end of the locking lever 671 and expanding the outer diameter of the retaining ring 672 and extends from the outer end of the locking lever 671 and expanding the outer diameter of the polygonal bolt 68. By means of the latching lever 671, the latching member 75 of the infant seat 74 of different specifications can be snapped on or off.

When the buckle 75 of the baby seat 74 is clamped to the buckle lever 671 to be engaged with each other, the assembling operation of the baby seat 74 and the stroller 3 is completed, and the gravity energy of the baby seat 74 is A downward pressure toward the bottom end of the two connection units 66 and an outward thrust from the inner pivot ear 413 toward the outer pivot ear 412 are generated, thereby effectively increasing the stabilization effect of the two connection units 66 and improving the The stability and safety of the baby seat 74.

In summary, the present invention is easy to change the baby stroller with a baby seat, and has the following effects and advantages, so it can indeed achieve the purpose of the present invention.

1. In the present invention, the polygonal jack 514 is provided on the pivot 51, the polygonal pin 62 is fixed on the fastener 61, the polygonal pin 65 is fixed on the fastener 64, and the fastener 67 The polygonal pin 68 is fixed. In this way, only the polygonal pin 62, or the polygonal pin 65, or the polygonal pin 68 is inserted into the polygonal socket 514, so that the fastener 61 or the fastener 64 can be made. Or, the fastener 67 is positioned on the stroller 3, compared with the mounting mechanism 20 of the TW I396643 patent, the structure of the present invention is relatively simple, and the production cost can be reduced.

2. The baby carriage 3 of the present invention is intended to be assembled for the baby seat 70, the baby seat 72, and the baby seat 74 of different specifications, and only the polygonal pin 62 originally inserted in the polygonal socket 514 is required. , The polygonal latch 65 and the polygonal latch 68 are pulled out, the fastener 61, the fastener 64, and the fastener 67 can be detached from the stroller 3, and then only the corresponding The baby seat 70, the baby seat 72, the polygonal pin 62 of the baby seat 70, the polygonal pin 65, and the polygonal pin 68 are inserted into the polygonal socket 514, so that the baby seat 70 of different specifications can be provided. The baby seat 72 and the baby seat 74 are assembled, so that the stroller 3 of the present invention can be conveniently and easily changed to install the fastener 61, the fastener 64, and the fastener 67 of different specifications. Then, the baby seat 70, the baby seat 72, and the baby seat 74 of different specifications can be assembled.

3. The gravity of the baby seat 70, the baby seat 72, and the baby seat 74 according to the present invention can generate a bottom-to-bottom for the corresponding two connecting units 60, the two connecting units 63, and the two connecting units 66. A downward pressure and an outward pushing force from the inner pivot ear 413 toward the outer pivot ear 412 can effectively increase the stabilization effect of the two connection units 60, the two connection units 63, and the two connection units 66, The stability and safety of the baby seat 70, the baby seat 72, and the baby seat 74 are improved.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

3‧‧‧ stroller

30‧‧‧frame unit

31‧‧‧ front wheel frame

311‧‧‧Front pole

32‧‧‧ rear wheel frame

321‧‧‧ rear rack bar

33‧‧‧Hand push frame

331‧‧‧Side frame rod

332‧‧‧Put

34‧‧‧ connecting rod

40‧‧‧ joint unit

41‧‧‧First Pivot

52‧‧‧nut

60‧‧‧Connecting unit

61‧‧‧ Fastener

611‧‧‧Socket

612‧‧‧connection block

613‧‧‧Polygonal jack

62‧‧‧Polygonal latch

63‧‧‧connection unit

64‧‧‧ Fastener

641‧‧‧Socket

642‧‧‧connection block

65‧‧‧Polygonal latch

411‧‧‧first sleeve

412‧‧‧ outer pivot ear

413‧‧‧ inner ear

42‧‧‧Second Pivot

421‧‧‧Second sleeve

422‧‧‧ Pivot Block

50‧‧‧ Pivot Unit

51‧‧‧ Pivot

511‧‧‧shaft body

512‧‧‧ convex ring

513‧‧‧Thread Section

514‧‧‧Polygonal jack

66‧‧‧connection unit

67‧‧‧ Fastener

671‧‧‧Snap lever

672‧‧‧Inner retaining ring

68‧‧‧Polygonal latch

70‧‧‧Baby seat

71‧‧‧Snap fastener

72‧‧‧Baby seat

73‧‧‧Snap fastener

74‧‧‧Baby seat

75‧‧‧Snap fastener

I‧‧‧ axis

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a side view of No. I396643; FIG. 2 is a perspective view of a mounting mechanism of No. I396643; Fig. 3 is an exploded perspective view of the mounting mechanism of the case No. I396643; Fig. 4 is a perspective view of the first embodiment of the stroller of the present invention, which is easy to change and install, and shows a baby seat assembled on a stroller; FIG. 5 is an exploded perspective view of the first embodiment, showing the baby seat is separated from the stroller; FIG. 6 is an incomplete partial perspective exploded view of the first embodiment, showing a joint unit and a pivot unit And a connection unit; FIG. 7 is a view similar to FIG. 4, showing changes in the pivot unit and the connection unit; FIG. 8 is an incomplete partial perspective exploded view taken from FIG. 7, showing a joint unit A pivoting unit and a connecting unit; FIG. 9 is a side view of a second embodiment of a baby stroller that is easy to change and install a baby seat, showing a baby seat assembled on a baby stroller; FIG. 10 is the first Second embodiment An incomplete perspective exploded view showing a joint unit, a pivot unit and a connection unit; FIG. 11 is a perspective view of a third embodiment of a baby carriage in which a baby seat is easily changed and installed according to the present invention, showing a baby seat assembled in FIG. 12 is an exploded perspective view of the third embodiment, showing a state where the baby seat is detached from the stroller; and FIG. 13 is an incomplete perspective exploded view of the third embodiment, showing an A joint unit, a pivot unit and a connection unit.

311‧‧‧Front pole

331‧‧‧Side frame rod

40‧‧‧ joint unit

41‧‧‧First Pivot

411‧‧‧first sleeve

412‧‧‧ outer pivot ear

413‧‧‧ inner ear

42‧‧‧Second Pivot

511‧‧‧shaft body

512‧‧‧ convex ring

513‧‧‧Thread Section

514‧‧‧Polygonal jack

52‧‧‧nut

60‧‧‧Connecting unit

61‧‧‧ Fastener

611‧‧‧Socket

421‧‧‧Second sleeve

422‧‧‧ Pivot Block

50‧‧‧ Pivot Unit

51‧‧‧ Pivot

612‧‧‧connection block

62‧‧‧Polygonal latch

I‧‧‧ axis

Claims (5)

A baby stroller with an easy to install and change baby seat. The baby stroller is suitable for being assembled or separated from the baby seat. The baby seat has two clips. The baby stroller includes: a frame unit, including a front wheel frame, A rear wheel frame, a hand push frame and two connecting rods, the front wheel frame has two front frame rods, the hand push frame has two side frame rods and a hand push rod connected to the two side frame rods, and the two side frame rods are respectively Pivotally connected to the top of the two front frame rods, the rear wheel frame and the two links are connected between the two front frame rods and the two side frame rods; two joint units are respectively installed on the two front frame rods and the two Between the two side frame rods, each joint unit includes a first pivot base and a second pivot base installed and fixed between the top of the front frame rod and the bottom of the side frame rod. An outer pivot ear and an inner pivot ear that are spaced and fitted on the outside of the second pivot base, and the first pivot base and the second pivot base are pivotally connected to each other and can be relatively rotated around an axis; two pivotal connection units, respectively Mounted on the two joint units, each pivoting unit includes a first pivot seat and a second pivoting hole that pass along the axis. A pivot between the bases, the pivot having a polygonal socket extending along the axis, the pivot having a shaft body passing between the first pivot base and the second pivot base, and a A convex ring of the shaft body and blocked by the outer pivot ear, and a threaded section provided on the shaft body and away from the convex ring, the pivot unit further includes a screw threaded to the threaded section and blocked by the inner pivot ear. A nut; and two connection units, which are respectively installed on the two pivot connection units, and each connection unit includes a fastening connection for engaging or disengaging with a corresponding fastening member Pieces, and a polygonal latch provided in the fastener and inserted into the corresponding polygonal jack, and the fastener is adjacent to the inner pivot ear and away from the outer pivot ear; when the two fasteners are connected with the two fasteners The buckle combination of the baby seat can generate a downward pressure on the two connection units and an outward thrust from the inner pivot ear toward the outer pivot ear to increase the stability of the two connection units. The baby carriage capable of being easily replaced with a baby seat according to claim 1, wherein the first pivot seat is installed on the side frame rod and has a set of first sleeves fixed outside the bottom of the side frame rod And the outer pivot ear and the inner pivot ear extending from the first sleeve, the second pivot seat is installed on the front frame rod, and has a second set fixed on the top of the front frame rod A barrel, and a pivot block extending from the second sleeve and located between the outer pivot ear and the inner pivot ear. The baby carriage capable of being easily replaced with a baby seat according to claim 2, wherein the fastener has a socket seated on the joint unit, and a connection extending from the socket and abutting against the inner ear Block, the polygonal pin is fixed to the connecting block, and the socket is used for engaging with or disengaging from the buckle to each other. The baby stroller with easy installation and replacement of the baby seat according to claim 2, wherein the fastening member has a fastening rod for engaging with or disengaging the fastening member from each other, and is formed on the fastening rod An inner stop ring with an enlarged outer diameter, and the polygonal latch with an enlarged outer diameter extending from the outer end of the buckle rod. A baby stroller that is easy to change and install a baby seat. The baby stroller is suitable for being assembled or separated from the baby seat. The baby seat has two clips. The baby stroller includes: A frame unit includes a front wheel frame, a rear wheel frame, a hand push frame and two connecting rods. The front wheel frame has two front frame rods. The hand push frame has two side frame rods and a frame connecting the two side frame rods. A hand push rod, the two side frame rods are respectively pivotally connected to the top of the two front frame rods, the rear wheel frame and the two links are connected between the two front frame rods and the two side frame rods; two joint units, Respectively mounted between the two front frame rods and the two side frame rods, and each joint unit includes a first pivot seat and a second pivot frame installed and fixed between the top of the front frame rod and the bottom of the side frame rods A pivot base, the first pivot base having an outer pivot ear and an inner pivot ear spaced from each other and sleeved outside the second pivot base, and the first pivot base and the second pivot base are pivotally connected to each other and can be wound around one The axes rotate relative to each other; two pivotal units are respectively mounted on the two joint units, and each pivotal unit includes a pivot shaft passing between the first pivot base and the second pivot base along the axis, and a fixed A polygonal latch connected to the pivot shaft and extending along the axis to protrude the inner pivot ear. The pivot shaft has a first pivot base and a second pivot base. Between the shaft body, a convex ring provided on the shaft body and blocked by the outer pivot ear, and a thread section provided on the shaft body and away from the convex ring, the pivot unit further includes a screw lock on the thread A nut which is blocked by the inner pivot ear; and two connection units, which are respectively mounted on the two pivot connection units, and each connection unit includes a fastener for engaging or disengaging with a corresponding fastener And a polygonal jack provided on the fastener and sleeved on the corresponding polygonal pin, and the fastener is adjacent to the inner pivot ear and away from the outer pivot ear; When the two fasteners are combined with the two fasteners, the gravity of the baby seat can generate a downward pressure on the two connection units and an outward thrust from the inner pivot ear toward the outer pivot ear. The stability effect of the two connection units is increased.