CN218536821U - Backrest structure of stroller - Google Patents

Abstract

The utility model provides a backrest structure of a stroller, which comprises a backrest arranged on a seat, wherein the backrest is provided with at least one hole area; the backrest is detachably provided with a shielding piece, and the shielding piece covers the hole area. A large hole area is arranged on the backrest and is positioned in the middle of the backrest. The backrest is provided with at least two hole areas, and the hole areas are symmetrically arranged on the backrest. The utility model discloses can be through the appearance and the colour of changing the shielding member on the hole district, make it has different outward appearances to lean against.

Description

Backrest structure of stroller

Technical Field

The utility model belongs to a bassinet field, concretely relates to children's shallow back structure.

Background

The existing stroller comprises a frame, a seat, a backrest, an armrest and the like. The existing backrest can not be changed in color and pattern, and the appearance can not be changed.

Disclosure of Invention

The utility model provides a baby carriage backrest structure.

The purpose of the utility model is realized with the following mode: the backrest structure of the baby stroller comprises a backrest arranged on a seat, wherein at least one hole area is arranged on the backrest; the backrest is detachably provided with a shielding piece, and the shielding piece covers the hole area.

A large hole area is arranged on the backrest and is positioned in the middle of the backrest.

The backrest is provided with at least two hole areas, and the hole areas are symmetrically arranged on the backrest.

The shape of the hole area is circular, oval or polygonal.

The shape of the shielding piece is a hard plate corresponding to the hole area or the shielding piece is a fabric corresponding to the shape of the hole area.

The edge of the shielding piece is detachably connected with the backrest through bolts or buttons.

Compared with the prior art, the backrest is provided with at least one hole area; the backrest is detachably provided with a shielding piece, and the shielding piece covers the hole area. One or more apertured sections are provided, and the backrest can be given a different appearance by changing the appearance and colour of the shield in the apertured section.

Drawings

Fig. 1 is an overall schematic view of an embodiment of the stroller.

Fig. 2 is an enlarged view of a leg portion of fig. 1.

Fig. 3 is a schematic view of the support bar slide and support bar guide inside the first support leg.

Fig. 4 is a partial cross-sectional view of the fourth locking mechanism.

Fig. 5 is a sectional view of the fourth lock mechanism in another direction.

Figure 6 is a third rotating member on the upper rotating joint.

Figure 7 shows a fourth rotating element of the revolute joint.

Fig. 8 is an exploded view of the fourth rotating member.

Fig. 9 is an enlarged schematic view of a structure of a seat rotating portion (a part of electrical relevant parts are omitted).

Fig. 10 is a cross-sectional view of fig. 9.

Fig. 11 is a schematic back rest.

Figure 12 is a schematic view of the back rest concealing the shield.

Figure 13 is an enlarged view of a portion of the upper back-to-back attachment shield.

Fig. 14 is a schematic view of the electrical connection components of the rotating portion of the seat.

Fig. 15 is a second stroller embodiment.

Fig. 16 is a schematic view of a first leg assembly in a second embodiment.

FIG. 17 is a schematic view of the first rotating member in the second embodiment.

Fig. 18 is an exploded view of the first rotating member in the second embodiment.

Fig. 19 is a second leg assembly of the second embodiment.

FIG. 20 is a schematic view of the second rotating member according to the second embodiment.

Fig. 21 is an enlarged structure of a rope tension spring and a rope connecting member portion in the rope mechanism.

Fig. 22 is a perspective view of the electrical connection component of fig. 14.

Wherein the content of the first and second substances, 2 is a first leg assembly, 3 is a second leg assembly, 4 is an upper revolute joint, 5 is a lower revolute joint, 6 is a backrest, 7 is a cable mechanism, 8 is a push rod assembly, 9 is a seat, 10 is a support rod,

20 support rod slide block, 21 third slide block, 22 fourth slide block, 23 first support leg, 24 support rod guide rail, 25 slide block first return spring, 26 slide block second return spring,

40 is a third rotating member, 41 is a fourth rotating member, 42 is a interlocking slider, 43 is an arc-shaped limit groove, 44 is a traction sliding groove, 45 is a locking slide groove, 46 is a rotating slide groove, 47 is a locking slider, 48 is a locking block, 49 is a interlocking column,

50 is a first rotating member, 51 is a second rotating member, 52 is a lock gear, 53 is a first slider, 54 is a second slider, 55 is a lock groove, 56 is a rotating groove; 60 is a hole area, 61 is a shielding piece,

70 is a rope, 71 is a rope tension spring, 72 is a rope connecting piece, 73 is an unlocking piece;

reference numeral 90 denotes a seat support cross-post, 91 denotes a drive motor, 92 denotes a support lug, 93 denotes a processor, and 94 denotes a battery.

Detailed Description

In the present invention, unless otherwise specifically defined and limited, the technical terms used in the present application should be the meanings commonly understood by those skilled in the art to which the present invention belongs. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" or "under" a second feature may be directly under or obliquely under the second feature or may simply mean that the first feature is at a lesser elevation than the second feature. Relational terms such as first, second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Terms used in the description such as "center", "lateral", "longitudinal", "length", "width", "thickness", "height", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated.

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments. As shown in fig. 1-21, a stroller includes a frame, and a seat and a backrest disposed on the frame. Wherein the frame includes first shank subassembly 2 and the second shank subassembly 3 that rotate the link to each other through lower revolute joint 5, first shank subassembly 2 upper end rotates through last revolute joint 4 and connects push rod assembly 8.

As shown in fig. 9-10, a stroller suspension seat 9 is provided, a seat 9 driving mechanism is disposed on a frame of the stroller, and an output end of the seat 9 driving mechanism is connected to the seat 9, so that a pitch angle of the seat 9 is changed. The angle change of the existing stroller seat 9 is manually adjusted, and the utility model discloses the pitching angle of the middle seat 9 is electrically adjusted through the seat 9 driving mechanism, thereby saving the labor.

An angle measuring instrument for measuring the angle between the seat 9 and the horizontal plane is arranged on the seat 9, a power supply and a controller 93 are arranged on either the seat 9 or the frame or the seat 9, and the angle measuring instrument and a driving element of a driving mechanism of the seat 9 are electrically connected with the controller 93; the power supply is electrically connected with the driving element, the dragon controller 93 and the angle measuring instrument. The power source may be a lithium battery 94, and all components requiring power are powered by the lithium battery 94. When the stroller is going up or down a slope, the angle between the seat 9 and the horizontal plane changes, and the angle measuring instrument detects the angle and sends a signal to the controller 93, and the controller 93 controls the driving element of the driving mechanism of the seat 9, such as the driving motor 91, to rotate by a corresponding angle, so that the seat 9 automatically rotates to the horizontal position. The utility model discloses well seat 9 can keep the horizontality automatically, guarantees wherein that children are in comfortable state. A switch, such as a button, may also be provided on the seat 9. The angle measuring instrument or the power supply is controlled to be turned on through the button. The measuring angle and the automatic angle adjusting system are started when the child cart needs to walk on a slope, and the automatic angle adjusting system is closed when the child cart is not used or the child cart walks on a flat road, so that the electric quantity of a power supply is saved. The switch may be a remote switch or other switch.

The seat 9 driving mechanism comprises a seat supporting cross column 90 with two ends respectively connected with the frame, a driving motor 91 is fixedly arranged in the seat supporting cross column 90, the driving motor 91 is connected with a speed reducer, the speed reducer comprises two coaxially arranged output shafts, and the two output shafts of the speed reducer are respectively and fixedly connected with the bottom of the seat 9. The axial directions of the output shaft of the motor and the output shaft of the speed reducer are vertical. The driving motor 91 can be installed at the bottom of the seat 9, and the installation space is more sufficient.

The two sides of the bottom of the seat 9, which are positioned on the speed reducer, are respectively provided with a support lug 92, the seat support cross column 90 is provided with a lug groove corresponding to the support lug 92, and the support lug 92 is rotatably arranged in the lug groove and the rotating shaft of the support lug is coaxial with the output shaft of the speed reducer.

The two ends of the seat support cross column 90 are detachably connected with the frame. The driving motor 91 is symmetrically arranged at the middle position of the seat supporting cross column 90 and the seat 9. The angle measuring instrument is a gyroscope or a level meter.

As shown in fig. 11-12, the backrest 6 structure of the stroller comprises a backrest 6 disposed on a seat 9, wherein at least one hole area 60 is disposed on the backrest 6; a shielding element 61 is detachably arranged on the backrest 6, and the shielding element 61 covers the hole area 60. One or more perforated sections 60 are provided to give the backrest 6 a different appearance by changing the shape and colour of the shield 61 in the perforated section 60.

A large perforated area 60 is provided on the backrest 6, and the perforated area 60 is located in the middle of the backrest 6.

Or at least two hole areas 60 are arranged on the backrest 6, and the hole areas 60 are symmetrically arranged on the backrest 6.

Wherein, the shape of the hole area 60 is a circle, an ellipse, a polygon or an irregular figure.

The shape of the shield 61 is a hard plate corresponding to the hole area 60 or the shield 61 is a fabric corresponding to the hole area 60.

The edge of the shielding piece 61 is detachably connected with the backrest 6 through bolts or buttons. Of course, other conventional methods of detachable connection may be selected depending on the material of the shield 61. In the drawing, a positioning column is arranged on the backrest 6, and the edge of the shielding piece 61 is sleeved on the positioning column and is pressed tightly by a bolt.

The leg assembly of the stroller has two main structures.

15-21, an embodiment of a stroller interlock release mechanism includes a first leg assembly 2 and a second leg assembly 3 pivotally connected by a lower pivot joint 5, the first leg assembly 2 being pivotally connected at an upper end to a push rod assembly 8 by an upper pivot joint 4; a third locking mechanism for unlocking and locking the upper rotating joint 4 is arranged in the upper rotating joint 4; a first locking mechanism and a second locking mechanism for locking and unlocking the lower rotating joint 5 are arranged in the lower rotating joint 5 to form a double-support locking mechanism; and after the third locking mechanism is unlocked, the first locking mechanism and the second locking mechanism are driven to be simultaneously linked and unlocked. The utility model discloses in, not set up bracing piece 10, directly play locking and supporting role through dual support locking mechanical system in the revolute joint. The upper rotating joint 4 and the lower rotating joint 5 are unlocked through the linkage mechanism, and the unlocking process is simple and rapid.

The upper turning joint 4 comprises a third turning member 40 connected to the push rod assembly 8 of the buggy and a fourth turning member 41 connected to the first leg assembly 2, the third and fourth turning members 40, 41 being arranged on a second turning axis and being rotatable in relation to each other, a third locking mechanism being arranged between the third and fourth turning members 40, 41; a linkage sliding block 42 connected with the rope mechanism 7 is further arranged between the third rotating part 40 and the fourth rotating part 41, a linkage column 49 is arranged on the linkage sliding block 42, an arc-shaped limiting groove 43 limiting the sliding track of the linkage sliding block 42 is arranged in the fourth rotating part 41, the linkage sliding block 42 is arranged in the arc-shaped limiting groove 43 in a sliding mode, and the linkage column 49 is arranged in a traction sliding groove 44 of the third rotating part 40 in a sliding mode; after the third rotating member 40 rotates a certain angle, the traction sliding groove 44 drives the linkage sliding block 42 to rotate, so that the rope mechanism 7 with the head end connected with the linkage sliding block 42 is pulled loose to realize linkage unlocking.

The lower rotary joint 5 includes a first rotating member 50 and a second rotating member 51 provided on the first rotating shaft to relatively rotate; the first locking mechanism comprises a locking gear 52 moving axially and a locking gear 52 unlocking mechanism controlling the locking gear 52 to move axially; the second locking mechanism is controlled to be unlocked by the locking gear 52 unlocking mechanism; the unlocking mechanism of the locking gear 52 comprises a first slide block 53 in end surface contact with the first locking gear 52 and a second slide block 54 matched with the first slide block 53 through an inclined surface, and the second slide block 54 is driven by a slide block driving mechanism to move along a plane vertical to the axial direction; the second sliding movement drives the first sliding block 53 to move axially, and a gear return spring which enables the locking gear 52 to return axially is arranged between either the first rotating piece 50 or the second rotating piece 51 and the locking gear 52; a slider return spring for returning the second slider 54 is provided between the second slider 54 and either the first rotating member 50 or the second rotating member 51.

The first locking mechanism and the second locking mechanism are linked to unlock; the second locking mechanism includes a locking groove 55 provided on the first rotating member 50 and a rotating groove 56 communicating with the locking groove 55; the second slide block 54 is provided with a locking column which slides in the locking groove 55 and the rotating groove 56; the length direction of the locking groove 55 is parallel to the moving direction of the second sliding block 54, and the rotating groove 56 is an arc-shaped groove coaxial with the first rotating member 50; the slide block driving mechanism is a rope mechanism 7, and the rope mechanism 7 pulls the second slide block 54 to move axially.

The head end of a rope 70 of the rope mechanism 7 is connected with the linkage sliding block 42, the tail end of the rope 70 is connected with a rope tension spring 71, the other end of the rope tension spring 71 is connected with an unlocking piece 73, and the unlocking piece 73 is connected with the second sliding block 54 through a pull rope or is directly and fixedly connected with a connecting rod piece.

The end of the rope 70 is fixed on a rope connecting piece 72, the rope connecting piece 72 is connected with the unlocking piece 73 through the elastic element, and a rope 70 resetting compression spring which enables the rope connecting piece 72 to reset is arranged between the rope connecting piece 72 and the frame of the baby carrier.

The third locking mechanism includes a locking slide groove 45 provided on the fourth rotating member 41 and a rotating slide groove 46 communicating with the locking slide groove 45; a locking slide block 47 which moves along a plane vertical to the axis of the third rotating part 40 is arranged between the third rotating part 40 and the fourth rotating part 41, and the locking slide block 47 is driven by a driving mechanism to move; a locking block 48 is arranged on the locking slide block 47, and the locking block 48 slides in the locking sliding chute 45 and the rotating sliding chute 46; the rotating chute 46 is an arc-shaped groove coaxial with the fourth rotating member 41, and the length direction of the locking chute 45 is parallel to the moving direction of the locking slider 47.

The push rod assembly 8 comprises a push rod and a sliding rod arranged at the upper end of the push rod, the sliding rod is arranged in the push rod in a sliding mode and locked through a push rod locking mechanism, and the sliding rod slides downwards to push the locking sliding block 47 to move and unlock the upper rotating joint 4.

The fourth rotating part 41 is provided with at least two locking sliding grooves 45 and two rotating sliding grooves 46; each locking runner 45 communicates with a respective rotary runner 46; a corresponding number of locking blocks 48 are provided on the locking slide 47. The locking is more firm, and it is more abundant to support.

Wherein the double support locking mechanism in the first linkage unlocking structure not only can be applied between the first leg component 2 and the second leg component 3, but also can be applied to other rotating joints of the baby carriage, a double support locking mechanism for the rotating joint of the baby carriage frame comprises a first rotating piece 50 and a second rotating piece 51 which are arranged on a first rotating shaft and rotate relatively, and a first locking mechanism for locking and unlocking the first rotating piece 50 and the second rotating piece 51 is arranged in the first rotating piece 50 and the second rotating piece 51, and is characterized in that: another second locking mechanism for locking and unlocking the first rotating member 50 and the second rotating member 51 is further provided between the first rotating member 50 and the second rotating member 51. The first locking mechanism and the second locking mechanism form a double locking mechanism, so that the locking state is more stable and safer. To the great revolute joint of locking power that needs, set up double-locking mechanism and can effectually increase revolute joint department locking power, increase support intensity, reduce the damage of joint department, ensure the life-span of product. The first locking mechanism comprises a locking gear 52 moving axially and a locking gear 52 unlocking mechanism controlling the locking gear 52 to move axially; the second locking mechanism is controlled to be unlocked by the locking gear 52 unlocking mechanism. The remaining structure has been described in detail above and will not be described in detail.

Wherein the cable 70 structure of the first linkage release structure may also be used in the remainder of the stroller to reduce the distance the cable 70 is pulled. The unlocking and pulling mechanism of the baby carrier comprises a rope mechanism 7, wherein the head end of a rope 70 of the rope mechanism 7 is connected with the pulling mechanism, and the tail end of the rope is connected with the unlocking mechanism; an elastic member is provided between the rope 70 and the unlocking mechanism so that the unlocking member 73 of the unlocking mechanism moves by a stroke smaller than the movement stroke of the rope 70. The distance the cable 70 is pulled and the unlocking member 73 is moved may be different to accommodate different unlocking configurations. The elastic element is a rope tension spring 71, and the elastic force of the rope tension spring 71 enables the unlocking piece 73 to achieve the unlocking stroke when the rope 70 achieves the maximum stroke. The end of the rope 70 is fixed on a rope connecting piece 72, the rope connecting piece 72 is connected with the unlocking piece 73 through the elastic element, and a rope 70 resetting compression spring which enables the rope connecting piece 72 to reset is arranged between the rope connecting piece 72 and the frame of the baby carrier. The elastic force of the return compression spring of the rope 70 is greater than the elastic force of the rope tension spring 71. Of course, it is also possible to directly return the rope connecting member 72 by changing the rotational positions of the upper revolute joint 4 or the remaining springs at the front and rear ends of the rope 70 without providing a return compression spring for the rope 70.

As shown in fig. 1-8, another embodiment of the stroller leg assembly attachment is configured as follows: a linkage unlocking mechanism of a baby carrier comprises a first leg component 2 and a second leg component 3 which are rotationally connected through a lower rotating joint 5, wherein the upper end of the first leg component 2 is rotationally connected with a push rod component 8 through an upper rotating joint 4; a third locking mechanism for unlocking and locking the upper rotating joint 4 is arranged in the upper rotating joint 4; articulated bracing piece 10 is gone up to second shank subassembly 3, the bracing piece 10 other end slides and sets up on the first shank subassembly 2 and through fourth locking mechanism realize with the fixed and unblock of first shank subassembly 2, drive fourth locking mechanism linkage unblock after the unblock of third locking mechanism.

The fourth locking mechanism comprises a support rod sliding block 20 hinged to the tail end of the support rod 10, and the support rod sliding block 20 and the first leg component 2 form a guide rail sliding block mechanism; the support rod sliding block 20 is slidably sleeved on the first leg component 2, a third sliding block 21 capable of movably extending out of the side surface of the first leg component 2 and a fourth sliding block 22 matched with the third sliding block 21 through an inclined surface are arranged in the inner cavity of the first leg component 2, and an opening corresponding to the third sliding block 21 is arranged on the support rod sliding block 20; the fourth sliding block 22 is driven by a rope pulling mechanism to move along the direction parallel to the length direction of the supporting rod guide rail 24, and a sliding block first return spring 25 is arranged between the fourth sliding block 22 and the first leg component 2; the fourth slide block 22 is pulled to drive the third slide block 21 to retract into the first leg component 2, so that unlocking is realized; a second slider return spring 26 is provided between the third slider 21 and the first leg assembly 2 to provide a motive force for extending the third slider 21.

The fourth locking mechanism comprises a support rod sliding block 20 hinged to the tail end of the support rod 10, the first leg component 2 comprises a first support leg 23, a support rod guide rail 24 is fixedly arranged in a cavity inside the first support leg 23, the support rod sliding block 20 is arranged on the support rod guide rail 24 in a sliding mode, a third sliding block 21 capable of movably extending out of the side face of the support rod guide rail 24 and a fourth sliding block 22 matched with the third sliding block 21 through an inclined plane are arranged in the support rod guide rail 24, and an opening corresponding to the third sliding block 21 is formed in the support rod sliding block 20; the fourth sliding block 22 is driven by a rope mechanism 7 to move along the direction parallel to the length direction of the supporting rod guide rail 24, and a sliding block first return spring 25 is arranged between the fourth sliding block 22 and the first leg component 2; the fourth slide block 22 is pulled to drive the third slide block 21 to retract into the support rod guide rail 24 to realize unlocking; a second slider return spring 26 is provided between the third slider 21 and the first leg assembly 2 to provide a motive force for extending the third slider 21. The inner side of the first supporting leg 23 is provided with a long groove for the sliding of the supporting rod 10. Compared with the previous embodiment, in the present embodiment, the parts of the fourth locking mechanism, such as the support bar sliding block 20, the support bar guiding rail 24, etc., are all hidden in the first support leg 23, which is elegant and not easy to cause wear of the parts.

The upper turning joint 4 comprises a third turning piece 40 connected with the push rod assembly 8 of the baby carriage and a fourth turning piece 41 connected with the first leg assembly 2, the third turning piece 40 and the fourth turning piece 41 are arranged on a second turning shaft and can turn mutually, and a third locking mechanism for unlocking and locking is arranged between the third turning piece 40 and the fourth turning piece 41; a linkage sliding block 42 connected with a rope 70 is further arranged between the third rotating part 40 and the fourth rotating part 41, a linkage column 49 is arranged on the linkage sliding block 42, an arc-shaped limiting groove 43 for limiting the sliding track of the linkage sliding block 42 is arranged in the fourth rotating part 41, the linkage sliding block 42 is arranged in the arc-shaped limiting groove 43 in a sliding manner, and the linkage column 49 is arranged in a traction sliding groove 44 of the third rotating part 40 in a sliding manner; after the third rotating member 40 rotates by a certain angle, the traction sliding groove 44 drives the linkage sliding block 42 to rotate, so that the rope mechanism 7 with the head end connected with the linkage sliding block 42 is loosened, and the rope mechanism 7 pulls the fourth sliding block 22 to realize linkage unlocking of the fourth locking mechanism.

The third locking mechanism includes a locking slide groove 45 provided on the fourth rotating member 41 and a rotating slide groove 46 communicating with the locking slide groove 45; a locking slide block 47 which moves along a plane vertical to the axis of the third rotating part 40 is arranged between the third rotating part 40 and the fourth rotating part 41, and the locking slide block 47 is driven by a driving mechanism to move; a locking block 48 is arranged on the locking slide block 47, and the locking block 48 slides in the locking sliding chute 45 and the rotating sliding chute 46; the rotating chute 46 is an arc-shaped groove coaxial with the fourth rotating member 41, and the length direction of the locking chute 45 is parallel to the moving direction of the locking slider 47.

The two linkage unlocking structures are the same in that: the unlocking structure of the upper revolute joint 4 and the locking of the leg assembly can be unlocked by the rotation of the upper revolute joint 4. The difference lies in that: the locking and unlocking mechanisms of the first and second leg assemblies 2, 3 are different.

In specific implementation, the push rod assembly 8 is unlocked, the push rod is pushed downwards, and the upper rotating joint 4 is unlocked. When the push rod is rotated to a certain angle, the linkage sliding block 42 pulls the rope, so that the support rod 10 or the lower rotating joint 5 is automatically unlocked, and the unlocking of the whole baby carrier is realized. When the pattern of the backrest 6 needs to be replaced, the shutter 61 is removed and replaced.

The features of the embodiments described above may be arbitrarily combined, and the combination of the features is not contradictory, and should be considered as a range described in the present specification. Without departing from the overall concept of the present invention, the technical solution of the present invention and equivalent substitutions or changes, and several changes and improvements made should also be regarded as the protection scope of the present invention.

Claims (6)

1. Children's shallow structure of backing to, including setting up the back on the seat, its characterized in that: at least one hole area is arranged on the backrest; the backrest is detachably provided with a shielding piece, and the shielding piece covers the hole area.

2. The stroller back rest structure of claim 1, wherein: a large hole area is arranged on the backrest and is positioned in the middle of the backrest.

3. The stroller back rest structure of claim 1, wherein: the backrest is provided with at least two hole areas, and the hole areas are symmetrically arranged on the backrest.

4. The stroller back rest structure according to any one of claims 1 to 3, wherein: the shape of the hole area is circular, oval or polygonal.

5. The stroller back rest structure according to any one of claims 1 to 3, wherein: the shape of the shielding piece is a hard plate corresponding to the hole area or the shielding piece is a fabric corresponding to the hole area.

6. The stroller back rest structure of claim 5, wherein: the edge of the shielding piece is detachably connected with the backrest through bolts or buttons.

Images