Seat body angle adjustment structure and child safety seat

Abstract

A seat body angle adjustment structure, comprising a base (1), an electric adjustment assembly (2), a manual adjustment assembly (3), and an angle adjustment assembly (4). Both the electric adjustment assembly and the manual adjustment assembly are connected to the angle adjustment assembly. States of the connection between the electric adjustment assembly and the angle adjustment assembly comprise a transmission connection state and a sliding connection state, and the movement of the angle adjustment assembly is capable of driving inclination angle adjustment of a seat body. When in the transmission connection state, the electric adjustment assembly works to drive the angle adjustment assembly to move, so as to implement the inclination angle adjustment of the seat body. When in the sliding connection state, the manual adjustment assembly moves to drives the angle adjustment assembly to move, so as to implement the inclination angle adjustment of the seat body. Said structure enables parents or users to select a suitable inclination angle adjustment method on the basis of actual needs. The electric adjustment method is suitable for daily use, and the manual adjustment method is not limited by the supply of power, so that the convenience of use, safety, and flexibility are improved. A child safety seat is further comprised.

Description

Chair body angle adjustment structure and child safety seat Technical Field

[0001] The present invention relates to the technical field of automobile safety products, and in particular to a seat body angle adjustment structure and a child safety seat. Background Art

[0002] With the continuous advancement of consumer and industry technologies, more and more parents are beginning to pay attention to the safety of child seats, while also placing greater emphasis on ease of use and versatility. They hope that seats can be adapted to various usage scenarios. Specifically, some parents want seats with freely adjustable recline angles to meet the diverse needs of their children. However, child safety seats currently on the market either use electric adjustment to achieve seat angle adjustment or require manual operation, which is inconvenient. Summary of the Invention

[0003] In order to solve at least one aspect of the above problems, the present invention first provides a chair body angle adjustment structure, including a base, an electric adjustment component, a manual adjustment component and an angle adjustment component suitable for connection with the chair body, the electric adjustment component and the manual adjustment component are both connected to the angle adjustment component, and the state in which the electric adjustment component and the angle adjustment component are connected to each other has a transmission connection state and a sliding connection state, and the movement of the angle adjustment component can drive the tilt angle adjustment of the chair body; when in the transmission connection state, the electric adjustment component works to drive the angle adjustment component to move to achieve the tilt angle adjustment of the chair body; when in the sliding connection state, the manual adjustment component moves to drive the angle adjustment component to move to achieve the tilt angle adjustment of the chair body.

[0004] Optionally, the base is connected to a fixing plate, the chair body is connected to a first chair body fixing rod and a second chair body fixing rod, the fixing plate is provided with a first sliding rail slidably connected to the first chair body fixing rod and a second sliding rail slidably connected to the second chair body fixing rod, and the angle adjustment assembly is connected to the first chair body fixing rod.

[0005] Optionally, the angle adjustment assembly includes a tooth box and a chair body connecting bracket, both ends of the chair body connecting bracket are hingedly connected to the tooth box and the first chair body fixing rod respectively, and the electric adjustment assembly and the manual adjustment assembly are both connected to the tooth box.

[0006] Optionally, the electric adjustment component includes a drive motor, a screw rod and a toothed disc, the drive motor is connected to the screw rod and can drive the screw rod to rotate synchronously, the toothed disc is installed in the toothed box, the screw rod passes through the toothed box, and the toothed box can move back and forth along the screw rod; when in the transmission connection state, the toothed disc is threadedly connected to the screw rod, the drive motor drives the screw rod to rotate, the screw rod drives the toothed disc to move to drive the toothed box to move, and the toothed box drives the chair body connecting bracket to move to drive the chair body to move, thereby adjusting the inclination angle of the chair body relative to the base; when in the sliding connection state, the toothed disc and the screw rod are separated from each other, the manual adjustment component moves to drive the toothed disc to move, and the toothed box drives the chair body connecting bracket to move to drive the chair body to move, thereby adjusting the inclination angle of the chair body relative to the base.

[0007] Optionally, the electric adjustment assembly further includes a bearing and a bearing seat connected to each other, the bearing seat is connected to the base, and the end of the screw rod away from the drive motor is connected to the bearing.

[0008] Optionally, the manual adjustment assembly includes a pull wire and a chainring release member, the chainring release member is installed in the tooth box, the pull wire passes through the tooth box and is connected to the chainring release member, the pull wire pulls the chainring release member to move to drive the chainring to move, so that the chainring is separated from the screw rod.

[0009] Optionally, the chainring includes a first chainring and a second chainring, and the first chainring and the second chainring are both connected to the gear box for left and right sliding; the chainring release piece is provided with a first guide groove and a second guide groove, the first chainring is provided with a first boss connected to the first guide groove for sliding, and the second chainring is provided with a second boss connected to the second guide groove for sliding; when in the transmission connection state, the first boss and the second boss are close to each other, and when in the sliding connection state, the first boss and the second boss are away from each other.

[0010] Optionally, the manual adjustment assembly further includes a reset member, and the front and rear ends of the reset member are respectively connected to the tooth box and the tooth disc release member.

[0011] Optionally, the manual adjustment assembly further includes a release handle movably connected to the base, and the front and rear ends of the pull wire are respectively connected to the release handle and the chainring release member.

[0012] Compared with the prior art, the chair body angle adjustment structure in the present invention drives the angle adjustment component to move through an electric adjustment component or a manual adjustment component to achieve the adjustment of the chair body tilt angle by electric adjustment or manual adjustment, so that parents or users can choose the appropriate tilt angle adjustment method according to actual needs. The electric adjustment method is suitable for daily use, and the chair body tilt angle can be adjusted through the electric adjustment component, while the manual adjustment method provides a backup adjustment method when the electric adjustment component stops working, is not restricted by power supply, and improves the convenience, safety and flexibility of the child safety seat.

[0013] In addition, the present invention provides a child safety seat, comprising the seat body angle adjustment structure described above.

[0014] Compared with the prior art, the child safety seat of the present invention and the above-mentioned chair body angle adjustment structure have the same advantages over the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a structural diagram of a chair body angle adjustment structure according to an embodiment of the present invention;

[0016] FIG2 is an exploded view of a partial structure of a chair body angle adjustment structure according to an embodiment of the present invention;

[0017] FIG3 is a cross-sectional view of the chair body angle adjustment structure in the initial position according to an embodiment of the present invention;

[0018] FIG4 is a partial structural diagram 1 of the chair body angle adjustment structure in the initial position according to an embodiment of the present invention;

[0019] FIG5 is a second partial structural diagram of the chair body angle adjustment structure in the initial position according to an embodiment of the present invention;

[0020] FIG6 is a partial structural diagram 1 of the chair body angle adjustment structure during manual adjustment according to an embodiment of the present invention;

[0021] FIG7 is a second partial structural diagram of the chair body angle adjustment structure during manual adjustment according to an embodiment of the present invention;

[0022] FIG8 is a structural diagram of the chair body angle adjustment structure according to an embodiment of the present invention when it is adjusted to a large reclining angle position.

[0023] Description of reference numerals:

[0024] 1. Base; 2. Electric adjustment assembly; 21. Drive motor; 22. Screw; 23. Bearing; 25. First chainring; 251. First boss; 26. Second chainring; 261. Second boss; 3. Manual adjustment assembly; 31. Pull wire; 32. Chainring release member; 321. First guide groove; 322. Second guide groove; 33. Reset member; 34. Release handle; 4. Angle adjustment assembly; 41. Gear box; 42. Chair body connecting bracket; 5. Fixing plate; 51. First slide rail; 52. Second slide rail; 6. First chair body fixing rod; 7. Second chair body fixing rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships based on the positions or location relationships during normal use of the product.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. The drawings of the embodiments of the present invention are provided with a coordinate system XY, where the positive direction of the X axis represents the left, the negative direction of the X axis represents the right, the positive direction of the Y axis represents the front, and the negative direction of the Y axis represents the back.

[0028] An embodiment of the present invention provides a chair body angle adjustment structure, as shown in Figures 1 to 8, comprising a base 1, an electric adjustment component 2, a manual adjustment component 3 and an angle adjustment component 4 suitable for connection to the chair body, the electric adjustment component 2 and the manual adjustment component 3 are both connected to the angle adjustment component 4, and the state in which the electric adjustment component 2 and the angle adjustment component 4 are connected to each other has a transmission connection state and a sliding connection state, and the movement of the angle adjustment component 4 can drive the tilt angle adjustment of the chair body; when in the transmission connection state, the electric adjustment component 2 works to drive the angle adjustment component 4 to move to achieve the tilt angle adjustment of the chair body; when in the sliding connection state, the manual adjustment component 3 moves to drive the angle adjustment component 4 to move to achieve the tilt angle adjustment of the chair body.

[0029] Among them, the chair body is movably installed on the base 1, and the chair body can be adjusted to a tilt angle relative to the base 1 to adapt to different needs of children; the electric adjustment component 2 is electrically connected to the circuit board, and the working state of the electric adjustment component 2 can be controlled by setting an operation key on the seat or connecting to the car computer and mobile phone APP through Bluetooth. In this way, when one parent drives the child alone, the tilt angle of the chair body can be adjusted at any time according to the needs of the child's riding state; the seat can also be designed with a zero-gravity large reclining angle state, by connecting the on-board monitoring equipment or the self-contained monitoring equipment with the car computer, and monitoring the child's state through the monitoring equipment. After the child falls asleep, the movement of the electric adjustment component 2 is controlled, so that the seat will automatically adjust to the zero-gravity large reclining angle state; in addition, the operation of the electric adjustment component 2 can also be controlled by one-button operation or voice control.

[0030] The manual adjustment component 3 and the electric adjustment component 2 choose to drive the angle adjustment component 4 to move, that is, when the electric adjustment component 2 and the angle adjustment component 4 are in a transmission connection state with each other, the manual adjustment component 3 will not drive the angle adjustment component 4 to move. At this time, the electric adjustment component 2 can drive the angle adjustment component 4 to move when it is powered on; when the electric adjustment component 2 and the angle adjustment component 4 are in a sliding connection state with each other, the electric adjustment component 2 will not drive the angle adjustment component 4 to move. At this time, the manual adjustment component 3 can drive the angle adjustment component 4 to move under the drive of manpower.

[0031] The chair body angle adjustment structure in this embodiment drives the angle adjustment component 4 to move through the electric adjustment component 2 or the manual adjustment component 3, so as to adjust the chair body tilt angle by electric adjustment or manual adjustment, so that parents or users can choose the appropriate tilt angle adjustment method according to actual needs. The electric adjustment method is suitable for daily use, and the chair body tilt angle can be adjusted by the electric adjustment component 2, while the manual adjustment method provides a backup adjustment method when the electric adjustment component 2 stops working, is not restricted by the power supply, and improves the convenience, safety and flexibility of the child safety seat.

[0032] Optionally, as shown in Figures 1, 3, and 8, the base 1 is connected to a fixing plate 5, the chair body is connected to a first chair body fixing rod 6 and a second chair body fixing rod 7, the fixing plate 5 is provided with a first slide rail 51 slidably connected to the first chair body fixing rod 6, and a second slide rail 52 slidably connected to the second chair body fixing rod 7, and the angle adjustment assembly 4 is connected to the first chair body fixing rod 6. The chair body is slidably connected to the fixing plate 5 via the first chair body fixing rod 6 and the second chair body fixing rod 7 to achieve a sliding connection between the chair body and the base 1; the first chair body fixing rod 6 and the second chair body fixing rod 7 are arranged side by side front and back, and when the angle adjustment assembly 4 drives the first chair body fixing rod 6 to move in the first slide rail 51, the second chair body fixing rod 7 also moves synchronously in the second slide rail 52, that is, the tilt angle of the chair body is changed, and the structure is stable and reliable.

[0033] Optionally, in combination with Figures 1, 2, 3, and 8, the angle adjustment assembly 4 includes a tooth box 41 and a chair body connecting bracket 42, the two ends of the chair body connecting bracket 42 are hingedly connected to the tooth box 41 and the first chair body fixing rod 6, respectively, and the electric adjustment assembly 2 and the manual adjustment assembly 3 are both connected to the tooth box 41. The electric adjustment assembly 2 and the manual adjustment assembly 3 can each independently drive the tooth box 41 to move, the tooth box 41 drives the chair body connecting bracket 42 to move, and the chair body connecting bracket 42 drives the chair body to achieve a change in tilt angle; in this embodiment, a hinged chair body connecting bracket 42 is provided between the tooth box 41 and the chair body, which not only reduces the force required to apply the electric adjustment assembly 2 or the manual adjustment assembly 3, but also saves effort and allows for flexible adjustment without getting stuck, thereby improving the user experience.

[0034] Optionally, in combination with Figures 1 to 8, the electric adjustment component 2 includes a drive motor 21, a screw rod 22 and a tooth plate, the drive motor 21 is connected to the screw rod 22 and can drive the screw rod 22 to rotate synchronously, the tooth plate is installed in the tooth box 41, the screw rod 22 passes through the tooth box 41, and the tooth box 41 can move back and forth along the screw rod 22; when in the transmission connection state, the tooth plate is threadedly connected to the screw rod 22, the drive motor 21 works to drive the screw rod 22 to rotate, and the screw rod 22 is rotated. 22 drives the chainring to move to drive the gear box 41 to move, and the gear box 41 drives the chair body connecting bracket 42 to move to drive the chair body to move, thereby adjusting the tilt angle of the chair body relative to the base 1; when in the sliding connection state, the chainring and the screw rod 22 are separated from each other, and the manual adjustment component 3 moves to drive the chainring to move, and the gear box 41 drives the chair body connecting bracket 42 to move to drive the chair body to move, thereby adjusting the tilt angle of the chair body relative to the base 1.

[0035] Among them, the screw rod 22 is provided with an external thread, and the tooth plate is provided with an internal thread suitable for cooperating with the external thread, and the screw rod 22 and the tooth plate are connected to realize transmission connection through a threaded connection; the drive motor 21 is fixedly connected to the base 1 through a motor fixing seat, making the connection more firm; the drive motor 21 shell is powered by a battery pack, and can also be powered by an external power supply through a power socket; the drive motor 21 is electrically connected to the circuit board, and the working state of the drive motor 21 can be controlled by setting an operation key on the seat or connecting to the car computer and mobile phone APP through Bluetooth, so that when one parent drives the child alone, the tilt angle of the chair body can be adjusted at any time according to the needs of the child's riding state; after the child falls asleep, the movement of the drive motor 21 is controlled so that the seat will automatically adjust to a zero-gravity large lying angle state; when in a sliding connection state, the tooth box 41 can move freely relative to the screw rod 22.

[0036] Optionally, in combination with Figures 1 to 8, the electric adjustment component 2 also includes a bearing 23 and a bearing seat that are connected to each other, the bearing seat is connected to the base 1, and the end of the screw rod 22 away from the drive motor 21 is connected to the bearing 23; the bearing 23 is fixed to the base 1 through the bearing seat, and the bearing 23 is connected to the screw rod 22 to ensure the stability and reliability of the operation of the screw rod 22, thereby ensuring that the tilt angle adjustment of the chair body can be carried out smoothly.

[0037] Optionally, in combination with Figures 1 to 8, the manual adjustment assembly 3 includes a pull wire 31 and a chainring release 32, the chainring release 32 is installed in the tooth box 41, the pull wire 31 passes through the tooth box 41 and is connected to the chainring release 32, the pull wire 31 pulls the chainring release 32 to move to drive the chainring to move, so that the chainring is separated from the screw rod 22.

[0038] Among them, the pull wire 31 is a thin and long rope, which passes through the gear box 41 and is connected to the chainring release part 32. The user operates the pull wire 31 to manually adjust the tilt angle of the chair body; when the tilt angle of the chair body needs to be manually adjusted, the user pulls the pull wire 31, and the pull wire 31 drives the chainring release part 32 to move, and the chainring release part 32 drives the chainring to move so that the chainring is separated from the screw rod 22, that is, in the manual adjustment mode, the chainring is not connected to the electric adjustment component 2. At this time, it is easy to switch to manual adjustment to adjust the tilt angle of the chair body, which provides more flexibility and convenience.

[0039] Optionally, in combination with Figures 1 to 8, the tooth plate includes a first tooth plate 25 and a second tooth plate 26, and the first tooth plate 25 and the second tooth plate 26 are both connected to the tooth box 41 for sliding left and right; the tooth plate release member 32 is provided with a first guide groove 321 and a second guide groove 322, the first tooth plate 25 is provided with a first boss 251 that is slidably connected to the first guide groove 321, and the second tooth plate 26 is provided with a second boss 261 that is slidably connected to the second guide groove 322; when in the transmission connection state, the first boss 251 and the second boss 261 are connected They are close to each other, and when in the sliding connection state, the first boss 251 and the second boss 261 are away from each other; the manual adjustment component 3 also includes a reset member 33, and the front and rear ends of the reset member 33 are respectively connected to the tooth box 41 and the tooth disc release member 32; the manual adjustment component 3 also includes a release handle 34 movably connected to the base 1, and the front and rear ends of the pull wire 31 are respectively connected to the release handle 34 and the tooth disc release member 32, and the release handle 34 is exposed and has a large size to facilitate the user to pull the pull wire 31 through the release handle 34.

[0040] Among them, the first chainring 25 and the second chainring 26 can move relative to each other in the left and right directions, and the guide grooves are oblique grooves or arc-shaped grooves, with the front ends of the guide grooves approaching each other and the rear ends moving away from each other; when the chair body tilt angle is adjusted by electric adjustment, it is in a transmission connection state, the first boss 251 is located at the front end of the first guide groove 321 and the second boss 261 is located at the front end of the second guide groove 322; when the chair body tilt angle is adjusted by manual adjustment, it is in a sliding connection state, the first boss 251 is located at the rear end of the first guide groove 321 and the second boss 261 is located at the rear end of the second guide groove 322; the reset member 33 is preferably a compression spring, which can push the chainring release member 32 to automatically reset when the pull wire 31 is released.

[0041] In this embodiment, a first toothed disc 25 and a second toothed disc 26 that can move relative to each other are provided, so that the adjustment mode of the chair body tilt angle can be easily switched between electric adjustment and manual adjustment, and the structure is simple and reliable. Specifically, when the seat is in a powered state and the reclining angle of the seat body needs to be adjusted, the driving motor 21 starts to drive the screw rod 22 to rotate, and the internal threads of the first toothed disc 25 and the second toothed disc 26 in the tooth box 41 are screwed together with the external threads of the screw rod 22. The first toothed disc 25 and the second toothed disc 26 in the tooth box 41 are not separated from the screw rod 22 under the elastic force of the reset member 33. The rotation of the screw rod 22 drives the first toothed disc 25 and the second toothed disc 26 to move in the front and rear directions, thereby driving the tooth box 41 to move back and forth. The chair body connecting bracket 42 drives the chair body to adjust the tilt angle through a hinged connection under the drive of the translational movement of the tooth box 41. When the required angle is adjusted, the driving motor 21 is controlled to stop working, and the tilt angle of the chair body can be locked. When the seat is in a powered-off state and the reclining angle of the seat needs to be adjusted, the lock is released by pulling the lock. The handle 34 and the release handle 34 pull the pull wire 31, and the other end of the pull wire 31 is connected and fixed to the chainring release member 32. When the release handle 34 pulls the pull wire 31, the chainring release member 32 moves forward and compresses the reset member 33 between the chainring box 41. When the chainring release member 32 moves forward, the first chainring 25 and the second chainring 26 below are moved to the left and right respectively through the first guide groove 321 and the second guide groove 322 provided on both sides. The internal threads of the first chainring 25 and the second chainring 26 are connected to the screw rod 2. 2 is separated, and the user can push the chair body to adjust the tilt angle. When the required angle is adjusted, the lock release handle 34 is released, and the first and second toothed plates 25, 26 move closer to each other under the elastic force of the reset member 33 until the internal threads of the first and second toothed plates 25, 26 engage with the external threads of the screw rod 22, completing the locking of the tilt angle. The above electric adjustment method and manual adjustment method are both stepless adjustment, that is, the tilt angle of the chair body can be arbitrarily stopped at any position within the travel range, providing a good user experience.

[0042] Another embodiment of the present invention provides a child safety seat, comprising the seat body angle adjustment structure described above.

[0043] In the child safety seat of this embodiment, the angle adjustment component 4 is driven by the electric adjustment component 2 or the manual adjustment component 3 to adjust the seat body tilt angle by electric adjustment or manual adjustment, so that parents or users can choose the appropriate tilt angle adjustment method according to actual needs. The electric adjustment method is suitable for daily use, and the seat body tilt angle can be adjusted by the electric adjustment component 2. The manual adjustment method provides a backup adjustment method when the electric adjustment component 2 stops working, is not limited by the power supply, and improves the convenience, safety and flexibility of the child safety seat.

[0044] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A chair body angle adjustment structure, characterized in that: The invention comprises a base (1), an electric adjustment component (2), a manual adjustment component (3) and an angle adjustment component (4) suitable for being connected to a chair body, wherein the electric adjustment component (2) and the manual adjustment component (3) are both connected to the angle adjustment component (4), and the state in which the electric adjustment component (2) and the angle adjustment component (4) are connected to each other comprises a transmission connection state and a sliding connection state, and the movement of the angle adjustment component (4) can drive the tilt angle adjustment of the chair body; when in the transmission connection state, the electric adjustment component (2) works to drive the movement of the angle adjustment component (4) to achieve the tilt angle adjustment of the chair body; when in the sliding connection state, the movement of the manual adjustment component (3) drives the movement of the angle adjustment component (4) to achieve the tilt angle adjustment of the chair body.

2. The chair body angle adjustment structure according to claim 1, characterized in that: The base (1) is connected to a fixing plate (5), the chair body is connected to a first chair body fixing rod (6) and a second chair body fixing rod (7), the fixing plate (5) is provided with a first slide rail (51) slidably connected to the first chair body fixing rod (6) and a second slide rail (52) slidably connected to the second chair body fixing rod (7), and the angle adjustment component (4) is connected to the first chair body fixing rod (6).

3. The chair body angle adjustment structure according to claim 2, characterized in that: The angle adjustment component (4) comprises a tooth box (41) and a chair body connecting bracket (42), the two ends of the chair body connecting bracket (42) are respectively hingedly connected to the tooth box (41) and the first chair body fixing rod (6), and the electric adjustment component (2) and the manual adjustment component (3) are both connected to the tooth box (41).

4. The chair body angle adjustment structure according to claim 3, characterized in that: The electric adjustment component (2) comprises a driving motor (21), a screw rod (22) and a toothed disc, wherein the driving motor (21) is connected to the screw rod (22) and can drive the screw rod (22) to rotate synchronously, the toothed disc is installed in the toothed box (41), the screw rod (22) passes through the toothed box (41), and the toothed box (41) can move forward and backward along the screw rod (22); when in the transmission connection state, the toothed disc is threadedly connected to the screw rod (22), the driving motor (21) works to drive the screw rod (22) to rotate, and the screw rod (22) ) drives the toothed disc to move, thereby driving the tooth box (41) to move, and the tooth box (41) drives the chair body connecting bracket (42) to move, thereby driving the chair body to move, thereby adjusting the inclination angle of the chair body relative to the base (1); when in the sliding connection state, the toothed disc and the screw rod (22) are separated from each other, and the manual adjustment component (3) moves to drive the toothed disc to move, and the tooth box (41) drives the chair body connecting bracket (42) to move, thereby driving the chair body to move, thereby adjusting the inclination angle of the chair body relative to the base (1).

5. The chair body angle adjustment structure according to claim 4, characterized in that: The electric adjustment assembly (2) further comprises a bearing (23) and a bearing seat which are connected to each other, wherein the bearing seat is connected to the base (1), and an end of the screw rod (22) away from the drive motor (21) is connected to the bearing (23).

6. The chair body angle adjustment structure according to claim 4 or 5, characterized in that: The manual adjustment assembly (3) comprises a pull wire (31) and a toothed disc release member (32); the toothed disc release member (32) is installed in the toothed box (41); the pull wire (31) passes through the toothed box (41) and is connected to the toothed disc release member (32); the pull wire (31) pulls the toothed disc release member (32) to move, thereby driving the toothed disc to move, so that the toothed disc is separated from the screw rod (22).

7. The chair body angle adjustment structure according to claim 6, characterized in that: The toothed disc comprises a first toothed disc (25) and a second toothed disc (26), and the first toothed disc (25) and the second toothed disc (26) are both slidably connected to the toothed box (41) leftward and rightward; the toothed disc release member (32) is provided with a first guide groove (321) and a second guide groove (322); the first toothed disc (25) is provided with a first protrusion (251) slidably connected to the first guide groove (321), and the second toothed disc (26) is provided with a second protrusion (261) slidably connected to the second guide groove (322); when in the transmission connection state, the first protrusion (251) and the second protrusion (261) are close to each other, and when in the sliding connection state, the first protrusion (251) and the second protrusion (261) are away from each other.

8. The chair body angle adjustment structure according to claim 6, characterized in that: The manual adjustment assembly (3) further comprises a reset member (33), the front and rear ends of which are respectively connected to the tooth box (41) and the toothed disc release member (32).

9. The chair body angle adjustment structure according to claim 6, characterized in that: The manual adjustment assembly (3) further comprises a release handle (34) movably connected to the base (1), and the front and rear ends of the pull wire (31) are respectively connected to the release handle (34) and the chainring release member (32).

10. A child safety seat, characterized in that: It comprises a chair body angle adjustment structure as described in any one of claims 1-9.

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