CN113071390A

CN113071390A - Chair body rotation and pitch angle adjusting mechanism and child safety seat

Info

Publication number: CN113071390A
Application number: CN202110543399.8A
Authority: CN
Inventors: 蓝晓艳; 丁鹏飞; 赵春耕
Original assignee: Anhui Yongchi Infant Intelligence Technology Co ltd
Current assignee: Anhui Yongchi Infant Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-07-06
Anticipated expiration: 2041-05-19
Also published as: CN113071390B

Abstract

The invention discloses a chair body rotation and pitch angle adjusting mechanism and a child safety seat, which comprise a chair body, a base, a turntable, a guide frame, a first locking component, a second locking component and a handle component, wherein the base is arranged on the chair body; the rotary table is rotatably and axially connected to the base, and the guide frame is fixedly arranged on the rotary table along the front-back direction; the chair body is movably connected to the guide frame in a pitch angle adjustable mode and rotates relative to the base along with the turntable; the first locking component is arranged between the turntable and the base and used for locking the relative rotation of the turntable and the base; the second locking assembly is arranged between the chair body and the guide frame and used for locking the relative movement of the chair body and the guide frame; handle subassembly is connected first locking subassembly and second locking subassembly to realize control two sets of locking subassemblies, rotatory and pitching angle's regulation is restricted through the locking mechanism of difference, utilizes handle subassembly control simultaneously to pitching angle adjustment mechanism and rotary mechanism's locking, has consequently simplified the seat structure, guarantees the stability and the reliability reinforcing that the chair body and base are connected when reinforcing seat operability, has improved the holistic security performance of seat.

Description

Chair body rotation and pitch angle adjusting mechanism and child safety seat

Technical Field

The invention relates to a child safety seat, in particular to a rotation and elevation angle adjusting mechanism between a seat body and a base of the child safety seat.

Background

Child safety seats are usually fixedly mounted on car seats, and the safety of children when riding in a car can be guaranteed. The child safety seat comprises a base and a seat body, and in order to meet the requirements of riding and comfort of children of different ages, a pitching angle adjustable structure is usually arranged between the base and the seat body; in addition, in order to meet the requirements of forward, reverse and left and right installation of the child safety seat on the automobile seat, a rotating mechanism is arranged between the seat body and the base.

Currently, there are two modes for pitch angle adjustable structure and rotation fixture control: the other is that the two are two sets of mutually independent executing structures, and are respectively controlled by respective locking driving mechanisms, such as a child safety seat with application publication number of CN105034873A for 360-degree rotation and pitch angle adjustment and a child safety seat with authorization publication number of CN 210363484U; the other is that the two are controlled by the same set of locking driving mechanism, when the locking mechanism is unlocked, the seat and the base present two degrees of freedom, namely, the seat can be adjusted in pitch angle and can rotate, and when the locking mechanism is locked, the two degrees of freedom are simultaneously locked, for example, a chair body rotation and pitch angle integrated adjusting mechanism with an authorized bulletin number of CN209336535U, a child safety seat and a safety seat with an application publication number of CN 112498196A.

Two modes are compared: in the former mode, the mechanisms are mutually independent, the operation flexibility is strong, and the safety is higher, while in the latter mode, the structure is simplified, the operability is enhanced, but the safety is poorer than that in the former mode because the same set of locking driving is shared.

Disclosure of Invention

The invention provides a chair body rotating and pitching angle adjusting mechanism, and further provides a child safety seat with the chair body rotating and pitching angle adjusting mechanism, wherein the rotating and pitching angle adjusting mechanism shares the same operating component, and can selectively operate and control respective executing components, thereby enhancing operability and ensuring the safety performance of the seat.

The technical scheme provided by the invention for solving the technical problems is that the chair body rotation and pitch angle adjusting mechanism comprises a chair body, a base, a turntable, a guide frame, a first locking component, a second locking component and a handle component;

the rotary table is rotatably and axially connected to the base, and the guide frame is fixedly arranged on the rotary table along the front-back direction;

the chair body is movably connected to the guide frame in a pitch angle adjustable mode and rotates relative to the base along with the turntable;

the first locking component is arranged between the turntable and the base and used for locking the relative rotation of the turntable and the base;

the second locking assembly is arranged between the chair body and the guide frame and used for locking the relative movement of the chair body and the guide frame;

the handle assembly is connected with the first locking assembly and the second locking assembly and controls the two groups of locking assemblies.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the handle assembly is switchable between three operating states:

in a first operation state, the first locking assembly and the second locking assembly are both in a locking state;

in a second operating state, the first locking assembly is locked, and the second locking assembly is unlocked;

in a third operating state, the first locking assembly and the second locking assembly are both in an unlocked state.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the handle assembly comprises an operating part capable of being pushed and pulled, a first acting part and a second acting part, wherein the first acting part and the second acting part are controlled by the operating part to move forwards and backwards, the first acting part is far away from the operating part, and the operating part and the first acting part are connected through a traction piece.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the traction piece is a flexible rope body or a rigid telescopic piece, and when the flexible rope body is tightened or the rigid telescopic piece extends, the first acting part is pulled along with the operation part.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the first acting part controls the first locking assembly, the second acting part controls the second locking assembly, and the second acting part and the operating part are integrally formed.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the first locking assembly comprises a plurality of positioning holes in the base and positioning pins capable of longitudinally extending and retracting in the rotary table, and the positioning pins are inserted into the positioning holes to fix the rotary table after rotating relative to the base.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the first acting part comprises a first adjusting chute, the positioning pin is provided with a first adjusting part matched with the first adjusting chute, and the adjusting part moves in the first adjusting chute to enable the positioning pin to extend into or withdraw from the positioning hole.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the second locking assembly comprises a plurality of gear holes in the guide frame and a transversely telescopic gear shaft in the chair body, and the gear shaft is inserted into the gear holes to fix the chair body after moving relative to the guide frame.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: the second action part comprises a second adjusting chute, the gear shaft is provided with a second adjusting part matched with the second adjusting chute, and the second adjusting part moves in the second adjusting chute to enable the gear shaft to extend into or withdraw from the gear hole.

Another protection topic of the present invention is: the child safety seat comprises a seat body rotating and pitching angle adjusting mechanism.

Compared with the prior art, the invention has the advantages that the guide frame for adjusting the pitch angle is arranged on the turntable of the rotating mechanism, the rotation and the pitch angle adjustment are limited by different locking mechanisms, and the locking of the pitch angle adjusting mechanism and the rotating mechanism is controlled by using one handle component, so that the seat structure is simplified, the operability of the seat is enhanced, the stability and the reliability of the connection between the seat body and the base are enhanced, and the overall safety performance of the seat is improved.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic view of the overall construction of a child safety seat according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the chair body rotation and pitch angle adjustment mechanism (including a stationary shaft);

FIG. 3 is a schematic view of the chair body rotation and pitch angle adjustment mechanism (without a fixed shaft);

FIG. 4 is a side view of the chair body rotation and pitch angle adjustment mechanism (without a fixed shaft);

FIG. 5 is an enlarged view of a portion of FIG. 3 at A in accordance with a preferred embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 3 at B in accordance with a preferred embodiment of the present invention;

FIG. 7 is a schematic structural view of a base in accordance with a preferred embodiment of the present invention;

FIG. 8 is an exploded schematic view of the first locking assembly, guide frame and partial handle assembly;

FIG. 9 is a schematic structural view of a slider according to a preferred embodiment of the present invention;

FIG. 10 is a schematic structural view of a locating pin according to a preferred embodiment of the present invention;

FIG. 11 is a schematic structural view of a traction element in accordance with a preferred embodiment of the present invention;

FIG. 12 is a schematic view of the assembly of the mounting base and the handle plate of a preferred embodiment of the present invention;

FIG. 13 is a schematic view of the mounting block and shift position pin assembly of a preferred embodiment of the present invention;

FIG. 14 is a schematic structural view of a handle plate according to a preferred embodiment of the present invention;

fig. 15 is a schematic structural view of a shift pin according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "first", "second", and the like are merely used for distinguishing between descriptions and are not to be construed as indicating or implying relative importance, but rather the specific meanings of the above terms in the present invention can be understood in a specific context by those of ordinary skill in the art.

As shown in fig. 1, the child safety seat includes a base 100 and a seat 200, wherein the seat 200 is assembled on the base 100. The rear side of base 100 is typically provided with an ISOFIX assembly that is docked and secured with an ISOFIX interface on the car seat to restrain the child safety seat.

In order to meet the requirements of the infants at different ages and the comfort thereof, a pitch angle adjustable structure is usually arranged between the base 100 and the chair body 200; in addition, in order to meet the requirements of forward and backward installation and left and right installation of the child seat 203 on the automobile seat, a rotating mechanism needs to be arranged between the seat body 200 and the base 100.

In the present embodiment, the tilt angle adjusting mechanism is provided on the rotating mechanism, and the lock of the tilt angle adjusting mechanism and the rotating mechanism is controlled by one operation member 71.

As shown in fig. 1 to 4, the rotation and pitch angle adjusting mechanism includes a chair body 200, a base 100, a turntable 300, a guide frame 400, a first locking assembly 500, a second locking assembly 600, and a handle assembly 700.

As shown in fig. 3, the turntable 300 is rotatably coupled to the base 100, and the guide frame 400 is fixedly mounted on the turntable 300 in the front-rear direction. The chair body 200 is movably connected to the guide frame 400 in a manner that the pitch angle is adjustable, and rotates relative to the base 100 along with the turntable 300. The first locking assembly 500 is disposed between the turntable 300 and the base 100 for locking the turntable 300 and the base 100 to rotate relatively. The second locking assembly 600 is disposed between the chair body 200 and the guide frame 400 for locking the relative movement of the chair body 200 and the guide frame 400. The handle assembly 700 connects the first locking assembly 500 and the second locking assembly 600 and controls both sets of locking assemblies.

Compared with the traditional structure that two mechanisms are separated and are independently controlled by respective control parts, the seat structure is simplified, the operability is enhanced, and the user experience is greatly improved.

Meanwhile, compared with the mode of sharing the same set of locking mechanisms, the rotation and pitch angle adjustment are limited by different locking mechanisms, so that the two sets of mechanisms can be independently locked, the stability and reliability of connection between the seat body 200 and the base 100 of the child safety seat are enhanced, and the overall safety performance is improved.

Preferably, the handle assembly 700 is switchable between three operating states, with the handle assembly 700 in different operating states, the states of the first and

second latch assemblies

500, 600 being different, so that the child safety seat is in different operable states:

when the handle assembly 700 is in the first operating state, the first locking assembly 500 and the second locking assembly 600 are both in the locked state, and the chair body 200 can neither rotate nor adjust the pitch angle along the guide frame 400.

When the handle assembly 700 is in the second operating state, the first lock assembly 500 is in the locked state and the second lock assembly 600 is in the unlocked state, and in this state, the user can only adjust the pitch angle of the chair body 200 and cannot adjust the rotation. Therefore, when the pitch angle is adjusted, the chair body 200 only has the freedom degree of one path, so that the difficulty in adjusting the pitch angle caused by the displacement of the chair body 200 in other directions is avoided, and the adjustment of the pitch angle of the chair body 200 is facilitated.

When the handle assembly 700 is in the third operating state, the first locking assembly 500 and the second locking assembly 600 are both in the unlocked state, and at this time, the user can adjust the pitch angle of the chair body 200, and can rotate the chair body to adjust the chair direction. At the moment, the user has multiple operation selections at the same time, so that the adjustment operation can be completed in one step, and the method is quicker and more convenient.

As shown in fig. 7, preferably, a circular recessed area S adapted to the turntable 300 is provided on the base 100, a shaft seat 2 having a shaft hole is provided at a middle position of the circular recessed area S, the shaft seat 2 protrudes out of the circular recessed area S, and a height of the shaft seat is related to a distance between the turntable 300 and the base 100, preferably, after a rotating shaft of the turntable 300 is inserted into the shaft hole, the turntable 300 can rotate 360 degrees around the rotating shaft, at this time, an upper surface of the circular recessed area S does not contact with a lower surface of the turntable 300, so as to avoid a mutual friction between the two and prevent a blockage of a rotation of the chair body.

Further, the circular recessed area S becomes a track for the rotation of the turntable 300, and when the chair body 200 and the base 100 are assembled, the turntable 300 is embedded into the circular recessed area S, so as to position and support the turntable 300, prevent horizontal micro-offset and longitudinal inclination during rotation, and enable the rotation to be smoother and more stable.

As shown in fig. 2-4 and 8, the guide frame 400 of the present embodiment includes two brackets disposed parallel to the diameter of the turntable 300, the two brackets are arc-shaped, and the bottom of the adaptive chair body 200 is also arc-shaped, so that when the chair body 200 moves back and forth along the guide frame 400, the angle of the chair body 200 with respect to the horizontal direction changes accordingly.

Preferably, a pair of long grooves K are respectively formed at both end portions, and the two fixing shafts 800 of the chair body 200 are respectively inserted into the pair of long grooves K. The fixing shaft 800 of the chair body 200 is inserted into the elongated slot K so that the chair body 200 can slide on the designed path according to a predetermined stroke with respect to the guide frame 400.

Preferably, as shown in fig. 8, a plastic sleeve 900 is disposed outside the fixing shaft 800, and the plastic sleeve 900 prevents the fixing shaft 800 from being separated from the elongated slot K in addition to the decoration function.

It should be understood that the chair body 200 is movably disposed on the guide frame 400 and the guide frame 400 is fixedly disposed on the turntable 300, so that the chair body 200 can slide along the guide frame 400 and change the direction of rotation of the turntable 300.

As shown in fig. 3, 5, 7 and 8, the first locking assembly 500 includes a plurality of positioning holes 501 on the base 100 and a longitudinally retractable positioning pin 502 on the turntable 300, and the positioning pin 502 is inserted into the positioning holes 501 to fix the turntable 300 after rotating relative to the base 100. More specifically, a positioning hole 501 is provided on the upper surface of the base 100, and the positioning pin 502 pulls the handle assembly 700 to move up and down into and out of the positioning hole 501.

For the rotation of the chair body 200 on the base 100 in four directions, front-back and left-right: four positioning holes 501 are uniformly distributed on the upper surface of the base 100 in a front-back, left-right, and annular manner. The chair body 200 can complete the rotation and locking on the base 100 in four directions, i.e. front-back direction, left-right direction.

As shown in fig. 3, 6 and 12, the second locking assembly 600 includes a plurality of shift holes 601 formed in the guide frame 400 along the length direction thereof and a transversely retractable shift shaft 602 formed in the chair body 200. The gear shaft 602 is inserted into the gear hole 601 to fix the chair body 200 after sliding relative to the guide frame 400.

The specific manner of cooperation of the handle assembly 700 of the present embodiment with the first and

second locking assemblies

500 and 600 is explained as follows.

As shown in fig. 2, 3, 5 and 6, the handle assembly 700 includes a manipulating portion 71 for pushing and pulling, and a first acting portion 72 and a second acting portion 73 which are controlled by the manipulating portion 71 to move forward and backward. The first acting part 72 is far away from the operating part 71, and the operating part 71 and the first acting part 72 are connected through a traction piece 74, so that the first acting part 72 can be remotely controlled.

As shown in fig. 2, 3, 5 and 6, the pulling member 74 is a flexible rope, and in this embodiment, a steel wire rope is used as the pulling member 74. When the flexible rope is tightened, the second acting portion 73 is pulled along with the operating portion 71. Of course, the pulling member 74 is not limited to a flexible rope, but may be a rigid telescopic member, and when the rigid telescopic member is extended, the second acting portion 73 is pulled along with the operating portion 71.

As shown in fig. 3, 5, 8 and 9, the first acting portion 72 is disposed on a slide block 701 which can move on the turntable 300 along with the pulling of the pulling member 74, and a hollow area is formed in the middle of the slide block 701. The turntable 300 is provided with a positioning seat 301 for penetrating the positioning pin 502, and a guiding hole column M for the positioning pin 502 to move is arranged in the middle of the positioning seat 301. The positioning seat 301 is located in the hollow area of the slider 701, and the first acting portion 72 is located at two sides of the slider 701 on two sides of the positioning seat 301.

As shown in fig. 3, 5, 8, 9 and 10, the positioning pin 502 includes a first position-limiting portion 3 engaged with the longitudinally extending positioning hole 501 and first adjusting portions 4 located on both sides of the first position-limiting portion 3 and extending transversely. The first acting portion 72 includes a first regulation chute 5 that cooperates with the first regulation portion 4. Both side walls of the first acting portion 72 are located outside the first regulating portion 4 on both sides. The end of the first adjusting part 4 is erected in the first adjusting chute 5 and moves within the first adjusting chute 5 to cause the positioning pin 502 to protrude into or withdraw from the positioning hole 501.

It should be noted that, in the present embodiment, the end a of the first regulation chute 5 remote from the manipulation portion 71 is higher than the end b close to the manipulation portion 71. After the manipulation portion 71 is pulled outward for a preset distance, the pulling member 74 is activated to drive the first acting portion 72 to be pulled toward a direction close to the manipulation portion 71, the first adjusting portion 4 falls from the end b to the end a, so that the positioning pin 502 moves upward integrally, the first limiting portion 3 is separated from the positioning hole 501 to achieve unlocking, and at this time, the rotating disc 300 can be rotated to achieve direction adjustment of the chair body 200.

As shown in fig. 5 and 8, a horizontally arranged first return spring 1 is arranged between the first acting part 72 and the turntable 300, when the first acting part 72 is pulled, the first return spring 1 is stretched, and the resilience force of the first return spring 1 keeps the first acting part 72 always moving backwards; when the user releases the operation portion, and the external force applied to the first acting portion 72 is removed, the first return spring 1 drives the first acting portion 72 to move backward, the first adjusting portion 4 falls from the end a to the end b, and drives the positioning pin 502 to move downward as a whole, the first limiting portion 3 enters the positioning hole 501 to achieve locking, at this time, the turntable 300 is fixed relative to the base 100, and the direction of the chair body 200 is determined.

As shown in fig. 6, 12-14, the second operating portion 73 is preferably adjacent the operating portion 71 and is rigidly connected thereto. Further, the second acting portion 73 and the manipulating portion 71 are integrally molded. Further, the second acting portion 73 and the operating portion 71 are integrally molded and made of plastic to form a handle plate 702.

As shown in fig. 12 to 15, the shift position shaft 602 includes a second stopper portion 10 engaged with the laterally extending shift position hole 601 and a second regulating portion 11 extending longitudinally toward the second acting portion 73, and the second acting portion 73 includes a second regulating diagonal 13. The second adjusting portion 11 extends into the second adjusting chute 13 and can slide on the second adjusting chute 13 to drive the gear shaft 602 to move, so that the gear shaft 602 extends into or exits from the gear hole 601.

The second regulation chute 13 is inclined from inside to outside in a direction close to the longitudinal portion, that is, the c end of the second regulation chute 13 remote from the manipulation portion 71 is located inside close to the d end of the manipulation portion 71. When the second acting portion 73 is pulled outwards together with the operating portion 71, the second adjusting portion 11 falls from the end d to the end c, the gear shaft 602 moves inwards, the second limiting portion 10 is disengaged from the positioning hole 501 to achieve unlocking, and at this time, the chair body 200 can slide back and forth relative to the guide frame 400 through the elongated slot K, so that the tilt angle of the chair body 200 can be adjusted to rotate the turntable 300 to achieve directional adjustment of the chair body 200.

As shown in fig. 13, a horizontally disposed second return spring 9 is disposed between the second acting portion 73 and the inner end of the shift lever 602, when the second acting portion 73 is pulled, the second adjusting inclined groove 13 drives the shift lever pin to move inward, the second return spring 9 is compressed, and the resilience of the second return spring 9 keeps the second acting portion 73 moving outward all the time. When the user releases the operation part and the external force applied to the second acting part 73 is removed, the second return spring 9 drives the gear pin to move outwards, and the second limiting part 10 enters the gear hole 601 to realize locking. And at the same time the second actuation portion 73 is driven to move in the opposite direction of movement to that when pulled, thereby returning the handle assembly 700 to the un-pulled position.

It should be noted that the first and

second operating portions

72 and 73 are selectively adjusted by the operating portion 71. The length of the steel wire rope meets the following requirements: when a user holds the operating part 71 by hand and pulls the handle plate 702 to a first preset position, the second adjusting inclined groove 13 of the second acting part 73 drives the gear pin, so that the second locking assembly 600 is unlocked, and at the moment, the steel wire rope is still in a loose state or just tightened; when the handle plate 702 is further extended outward, the wire rope is tightened and acts on the first acting portion 72, unlocking the first locking assembly 500.

As shown in fig. 1 and 4, the chair body 200 in this embodiment includes a chair seat 201, a chair back 202, and a mounting seat 203 fixed under the chair seat 201. The mounting seat 203 is disposed on the front side of the seat 201, and the handle plate 702 is slidably disposed in the mounting seat 203. The middle of the mounting seat 203 is provided with a groove, and the groove and the bottom surface of the seat 201 enclose to form a sliding channel for the handle plate 702 to move. The slide channel extends forwardly to form an opening through which the operating portion 71 is exposed for operation by a user.

As shown in fig. 12 to 13, the mounting seat 203 is provided with a transverse sliding slot T, and the shift lever shaft 602 and the second return spring 9 are disposed in the transverse sliding slot T. The upper portion of horizontal spout T is uncovered, and the lateral part of mount pad 203 has the lateral part through-hole that horizontal spout T link up, and the cooperation with gear hole 601 is realized through the lateral part through-hole of mount pad 203 to the spacing portion 10 of second of gear axle 602, and the second regulation of gear axle 602 is uncovered from the upper portion of horizontal spout T and is stretched out and cooperate with second regulation chute 13.

As shown in fig. 13-14, the mounting seat 203 is provided with a guide post 15 protruding upward in the sliding channel, the handle plate 702 is provided with a waist-shaped hole 14 engaged with the guide post 15, the waist-shaped hole extends along the moving direction of the handle plate 702, and the guide post 15 is inserted into the waist-shaped hole and moves along the waist-shaped hole, so that the movement of the handle plate 702 is guided while the mounting of the handle plate 702 is realized.

As shown in fig. 5, 6, and 11, in this embodiment, the steel wire rope includes a rope body 6, a sheath 7, and connectors 8 located at two ends of the rope body 6, wherein the sheath 7 is sleeved outside the rope body 6, and the two connectors 8 are respectively fastened to the slider 701 and the handle plate 702, so that the handle plate 702 moves to drive the slider 701.

The chair body rotation and pitch angle adjustment mechanism and the child safety seat provided by the invention are described in detail above, and the principle and the embodiment of the invention are explained in the present document by applying specific examples, and the above description of the embodiments is only used to help understanding the invention and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The chair body rotation and pitch angle adjusting mechanism is characterized by comprising a chair body, a base, a turntable, a guide frame, a first locking component, a second locking component and a handle component;

2. The chair body rotation and pitch angle adjustment mechanism of claim 1, wherein the handle assembly is switchable between three operational states:

3. The chair body rotation and pitch angle adjusting mechanism according to claim 1, wherein the handle assembly comprises an operating portion for pushing and pulling, a first operating portion and a second operating portion controlled by the operating portion to move forward and backward, the first operating portion is remote from the operating portion, and the operating portion and the first operating portion are connected by a traction member.

4. The chair body rotation and pitch angle adjusting mechanism according to claim 3, wherein the pulling member is a flexible rope or a rigid extension member, and the first acting portion is pulled along with the operating portion when the flexible rope is tightened or the rigid extension member is extended.

5. The chair body rotation and pitch angle adjustment mechanism of claim 3, wherein the first operating portion controls a first locking assembly, the second operating portion controls a second locking assembly, and the second operating portion is integrally formed with the operating portion.

6. The chair body rotation and pitch angle adjustment mechanism of claim 5, wherein the first locking member comprises a plurality of positioning holes formed in the base and a longitudinally extendable and retractable positioning pin formed in the turntable, the positioning pin being inserted into the positioning holes to secure the turntable after rotation relative to the base.

7. The chair body rotation and pitch angle adjustment mechanism of claim 6, wherein the first acting portion comprises a first adjustment slot, the positioning pin has a first adjustment portion engaged with the first adjustment slot, and the adjustment portion moves within the first adjustment slot to allow the positioning pin to extend into or retract from the positioning hole.

8. The chair body rotation and pitch angle adjustment mechanism of claim 5, wherein the second locking assembly comprises a plurality of shift holes formed in the guide frame and a laterally retractable shift shaft formed in the chair body, and the shift shaft is inserted into the shift holes to fix the chair body after moving relative to the guide frame.

9. The chair body rotation and pitch angle adjustment mechanism of claim 8, wherein the second acting portion comprises a second adjustment slot, the shift shaft has a second adjustment portion engaged with the second adjustment slot, and the second adjustment portion moves within the second adjustment slot to allow the shift shaft to extend into or retract from the shift hole.

10. A child safety seat comprising the seat body rotation and pitch angle adjustment mechanism according to any one of claims 1 to 9.