Seat mechanism and child seat

Abstract

According to the seat mechanism and the child seat, when the rotation angle of a seat back needs to be adjusted, only an adjusting handle needs to be pulled, the adjusting handle can trigger a handle signal switch, a rotary positioning locking module releases a rotary disc, then the rotary disc and the seat back rotate together relative to a base, and the rotation angle can be adjusted; after the angle adjustment is finished, the adjusting handle is loosened, the adjusting handle is reset to trigger the handle signal switch again, and the rotating disc can be locked by rotating the positioning and locking module, so that the rotation angle adjustment of the chair back can be finished, a manual and electric combined mode is adopted in the whole adjustment process, and a user only needs to pull the adjusting handle and rotate the chair back; and the unlocking and locking processes are electrically realized, so that the mode of manually rotating the chair back is more convenient and quicker, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile accessories, in particular to a chair seat mechanism and a child seat. BACKGROUND

[0002] With the continuous upgrading of consumer demand, more and more parents begin to pay attention to the safety of children riding in child seats, and put forward higher requirements for the convenience of seat operation.

[0003] In order to meet the needs of different markets and different customer groups, the seat needs to be electrically powered in a functional modular grouping form. Some users are used to manually pulling the seat to adjust the rotation angle, but the traditional manual rotation angle adjustment method also needs to manually release the chair back before rotating and adjusting, which is inconvenient to operate. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a chair seat mechanism and a child seat, which is more convenient and fast to rotate the chair back, and is easy to operate.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, the utility model provides a chair seat mechanism, which comprises a base, a rotating disc, a rotating positioning and locking module and a handle module.

[0007] The rotating disc is rotatably arranged on the base, and is used for fixing a chair back.

[0008] The handle module comprises a handle seat, a handle signal switch arranged on the handle seat and an adjusting handle movably arranged on the handle seat. When the adjusting handle moves relative to the handle seat, the adjusting handle can trigger the handle signal switch. The handle seat is used for being fixed on the lower side of the chair back.

[0009] The rotating positioning and locking module is arranged on the base and is used for locking the rotating disc. The rotating positioning and locking module can lock or release the rotating disc when the handle signal switch is triggered.

[0010] In an optional embodiment, one side of the handle seat facing the adjusting handle is provided with a mounting groove, and the handle signal switch is arranged in the mounting groove.

[0011] In an optional embodiment, the adjusting handle is provided with a triggering part, which is used for triggering the handle signal switch when the adjusting handle moves relative to the handle seat.

[0012] In an optional embodiment, the handle module further comprises a handle reset elastic member arranged between the handle seat and the adjusting handle.

[0013] In an optional embodiment, the rotation positioning locking module comprises a module housing, a release locking driving member arranged in the module housing, and a release locking assembly connected with the release locking driving member, the release locking driving member being used to drive the release locking assembly to move relative to the module housing when the handle signal switch is triggered, so as to lock or release the rotation disc by the release locking assembly.

[0014] In an optional embodiment, the release locking assembly comprises a release locking switch and a locking bolt;

[0015] The locking bolt is slidably arranged in the module housing and can move between an extended locking position and a retracted release locking position, the rotation disc being locked when the locking bolt is in the extended locking position and being released when the locking bolt is in the retracted release locking position;

[0016] The release locking switch is connected with the release locking driving member and can move between a first position and a second position relative to the module housing under the driving of the release locking driving member, the release locking switch being able to limit the locking bolt in the retracted release locking position when the release locking switch is in the first position, and the release locking switch being able to return to the extended locking position when the release locking switch is in the second position.

[0017] In an optional embodiment, the release locking assembly further comprises a reset spring arranged between the module housing and the locking bolt, the reset spring being used to make the locking bolt have a movement tendency from the retracted release locking position to the extended locking position.

[0018] In an optional embodiment, the rotation positioning locking module further comprises a first signal switch;

[0019] During the process that the release locking driving member drives the release locking switch to move from the second position to the first position, the release locking driving member stops when the release locking switch triggers the first signal switch.

[0020] In an optional embodiment, the rotation positioning locking module further comprises a second signal switch;

[0021] During the process that the release locking driving member drives the release locking switch to move from the first position to the second position, the release locking driving member stops when the release locking switch triggers the second signal switch.

[0022] In an optional embodiment, the release locking driving member comprises a motor, the release locking switch being able to rotate under the driving of the release locking driving member, wherein the release locking switch has a first pushing guide surface;

[0023] The locking bolt has a push column with a second push guide surface, and the first push guide surface can be in sliding contact or separated from the second push guide surface.

[0024] In a second aspect, the utility model provides a child seat, including chair back and the chair seat mechanism of any preceding embodiment;

[0025] The chair back is fixed on the rotating disc;

[0026] The handle seat is fixed on the lower side of the chair back.

[0027] In an optional embodiment, the child seat further comprises a reclining angle adjusting mechanism for driving the chair back to slide relative to the rotating disc to change the reclining angle of the chair back relative to the rotating disc.

[0028] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0029] When the chair back rotation angle needs to be adjusted, only the adjusting handle needs to be pulled, so that the adjusting handle triggers the handle signal switch, the rotating positioning locking module releases the rotating disc, then the rotating disc and the chair back rotate together relative to the base to realize the rotation angle adjustment, and the adjusting handle is released after the angle adjustment is completed, the adjusting handle is reset to trigger the handle signal switch again, the rotating positioning locking module locks the rotating disc, so that the rotation angle adjustment of the chair back is completed, the whole adjustment process adopts the combination of manual and electric modes, the user only needs to pull the adjusting handle and rotate the chair back, the release and locking processes are realized by electricity, so that the manual rotation of the chair back is more convenient and fast, and is easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0031] Figure 1 It is an exploded view of the child seat of the embodiments of the present application;

[0032] Figure 2 It is a partial sectional view of the child seat of the embodiments of the present application;

[0033] Figure 3 It is a schematic view of the handle module of the embodiments of the present application when the adjusting handle is not pulled;

[0034] Figure 4 This is a schematic diagram of the handle module in an embodiment of this application after the handle is pulled.

[0035] Figure 5 This is an exploded view of the rotation positioning and locking module according to an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the rotary positioning and locking module in an embodiment of this application when the locking pin is in the extended locking position;

[0037] Figure 7 This is a schematic diagram of the rotary positioning and locking module in an embodiment of this application when the locking pin is in the retracted and unlocked position;

[0038] Figure 8 This is a schematic diagram of the child safety seat in the initial position according to an embodiment of this application;

[0039] Figure 9 To be Figure 8 A schematic diagram of the chair back after it has been rotated;

[0040] Figure 10 To be Figure 8 A diagram showing the reclining angle of the middle chair back;

[0041] Figure 11 for Figure 8 A partial sectional view in the document;

[0042] Figure 12 for Figure 10 A partial sectional view.

[0043] Icons: 100-Base; 101-Lower cover of base; 102-Upper cover of base; 110-Rotating disk; 111-Sliding groove; 120-Rotating positioning and locking module; 121-Module housing; 122-Release drive component; 123-Release switch; 1230-First push guide surface; 124-Locking pin; 1240-Push column; 1241-Second push guide surface; 125-Reset spring; 126-First signal switch; 127-Second signal switch; 130-Handle module; 131-Handle base; 1310-Mounting slot; 132-Adjustable handle; 1320-Trigger part; 133-Handle signal switch; 134-Handle reset elastic element; 200-Chair back; 300-Reclining angle adjustment mechanism; 310-Fixed bracket; 320-Reclining angle drive element; 330-Leading screw; 340-Leading screw sliding seat; 350-Leading screw bracket; 360-Connecting shaft. Detailed Implementation

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0046] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0049] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The following will be described in detail with reference to the drawings Figures 1 to 12Some embodiments of the present application will be described in detail. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0051] Reference Figure 1 The chair seat mechanism disclosed in the embodiments of the present application can also be applied to other seats requiring rotation function, and the use scenarios are not limited to child seats.

[0052] In addition to the chair seat mechanism, the child seat usually comprises a chair back 200 and a reclining angle adjusting mechanism 300. The chair back 200 is arranged on the chair seat mechanism and rotates with the chair seat mechanism to achieve the function of adjusting the rotation angle. The reclining angle adjusting mechanism 300 is used to drive the chair back 200 to slide forward and backward relative to the chair seat mechanism to adjust the reclining angle of the chair back 200, i.e., to change the inclination angle of the chair back 200 relative to the chair seat mechanism.

[0053] In combination Figure 2 The reclining angle adjusting mechanism 300 mainly comprises a fixed support 310, a reclining angle driving member 320, a lead screw 330, a lead screw sliding seat 340, a lead screw support 350 and a connecting shaft 360. The fixed support 310 is fixed on the rotating disc 110 and is used to fix the reclining angle driving member 320. The reclining angle driving member 320 comprises a motor which is connected with one end of the lead screw 330. The lead screw support 350 is used to bear the other end of the lead screw. The connecting shaft 360 is fixed on the lead screw sliding seat 340 and is inserted into the sliding groove 111 on the rotating disc 110 at both ends. The lead screw sliding seat 340 is threadedly connected with the lead screw 330 and is fixedly connected with the chair back 200. When the lead screw 330 is driven to rotate by the reclining angle driving member 320, the lead screw sliding seat 340 moves linearly, thereby driving the chair back 200 to adjust the reclining angle through the relative sliding of the connecting shaft 360 in the sliding groove 111.

[0054] The chair seat mechanism mainly comprises a base 100, a rotating disc 110, a rotating positioning and locking module 120 and a handle module 130.

[0055] The rotating disc 110 is rotatably arranged on the base 100. The chair back 200 is arranged on the rotating disc 110, i.e., the rotating disc 110 serves as a fixing base for the chair back 200.

[0056] In combination Figure 3 And Figure 4The handle module 130 comprises a handle seat 131, a handle signal switch 133 arranged on the handle seat 131, and an adjusting handle 132 movably arranged on the handle seat 131. The adjusting handle 132 can trigger the handle signal switch 133 when the adjusting handle 132 moves relative to the handle seat 131. The handle seat 131 is arranged on the rotating disc 110, specifically, the handle seat 131 is fixed on the lower side of the chair back 200, and is indirectly arranged on the rotating disc 110, and rotates together with the rotating disc 110 and the chair back 200 relative to the base 100.

[0057] The rotating positioning and locking module 120 is arranged on the base 100, and is used for locking the rotating disc 110. The rotating positioning and locking module 120 can lock or release the rotating disc 110 when the handle signal switch 133 is triggered.

[0058] In this way, when the rotating angle of the chair back 200 needs to be adjusted, the adjusting handle 132 only needs to be pulled, so that the adjusting handle 132 triggers the handle signal switch 133, the rotating positioning and locking module 120 releases the rotating disc 110, and then the rotating disc 110 and the chair back 200 rotate together relative to the base 100 to realize the angle adjustment. After the angle adjustment is completed, the adjusting handle 132 is released, the adjusting handle 132 is reset to trigger the handle signal switch 133 again, and the rotating positioning and locking module 120 locks the rotating disc 110. In this way, the rotating angle adjustment of the chair back 200 is completed. The entire adjustment process adopts a combination of manual and electric modes, and the user only needs to pull the adjusting handle 132 and rotate the chair back 200. The releasing and locking processes are realized by electricity, so that the manual rotating mode of the chair back 200 is more convenient and fast, and is easy to operate.

[0059] In detail, the handle module 130 is arranged on the lower surface of the chair back 200, and is indirectly arranged on the rotating disc 110. Of course, in some embodiments, the handle module 130 can also be directly arranged on the rotating disc 110, as long as the user can conveniently pull the handle module 130.

[0060] The base 100 comprises a base lower cover 101 and a base upper cover 102. The base lower cover 101 is used for fixing the rotating disc 110 and the chair back 200. The base upper cover 102 is used for fixing the operation panel and cooperating with the base lower cover 101 to fix the rotating disc 110 and the chair back 200.

[0061] In order to realize the installation of the handle signal switch 133, one side of the handle seat 131 facing the adjusting handle 132 is provided with a mounting groove 1310, and the handle signal switch 133 is arranged in the mounting groove 1310. The adjusting handle 132 is provided with a protruding trigger part 1320, and the trigger part 1320 is used for triggering the handle signal switch 133 when the adjusting handle 132 moves relative to the handle seat 131.

[0062] To facilitate the adjustment of the handle 132 can be automatically reset after being pulled, the handle module 130 also includes a handle reset elastic member 134, the handle reset elastic member 134 is arranged between the handle seat 131 and the adjustment handle 132, so that the user pulls the adjustment handle 132, the handle reset elastic member 134 produces elastic deformation, the handle reset elastic member 134 releases after the hand is loose, that is, the elastic force can be applied to the adjustment handle 132 to realize the reset function, wherein the handle reset elastic member 134 can be a compression spring, the two ends are respectively abutted with the handle seat 131 and the adjustment handle 132, and the elastic thrust is provided. In addition, in some embodiments, the handle reset elastic member 134 can also be a tension spring, providing elastic tension.

[0063] In combination Figures 5 to 7 The rotation positioning locking module 120 includes a module shell 121, a release locking driving member 122 and a release locking assembly arranged in the module shell 121, the module shell 121 is fixed to the base 100, the release locking assembly is connected with the release locking driving member 122, and the release locking driving member 122 is used to drive the release locking assembly to move relative to the module shell 121 in the case that the handle signal switch 133 is triggered, so as to lock or release the rotation disc 110.

[0064] In order to realize the electric locking or releasing of the rotation disc 110, the release locking assembly includes a release locking switch 123 and a locking bolt 124; the locking bolt 124 is slidably arranged in the module shell 121, so as to be movable between an extended locking position and a retracted release position, when the locking bolt 124 is located at the extended locking position, the rotation disc 110 can be locked, and when the locking bolt 124 is located at the retracted release position, the rotation disc 110 can be released; the release locking switch 123 is connected with the release locking driving member 122, and is movable between a first position and a second position relative to the module shell 121 under the driving of the release locking driving member 122, when the release locking switch 123 is located at the first position, the release locking switch 123 can limit the locking bolt 124 at the retracted release position, and when the release locking switch 123 is at the second position, the release locking switch 123 can return to the extended locking position.

[0065] It can be understood that the rotation disc 110 is provided with a plurality of angle gear holes, so that the locking bolt 124 is inserted into different angle gear holes to lock the rotation disc 110 and the chair back 200 at different angles.

[0066] In detail, the module shell 121 includes a module seat and a module decorative cover detachably connected to the module seat, the module is used to carry components such as the release locking driving member 122, the first signal switch 126, the second signal switch 127, the reset spring 125 and the locking bolt 124, and the module decorative cover is used to cover and protect each component.

[0067] The release assembly further comprises a reset spring 125 arranged between the module shell 121 and the locking bolt 124, for making the locking bolt 124 have a movement tendency from the retracted release position to the extended locking position, so that after the release driving member 122 drives the release switch 123 to move from the first position to the second position, the locking bolt 124 can be returned to the extended locking position by the elastic force of the reset spring 125 in the case of aligning with any angular slot hole on the rotating disc 110, so as to lock the rotating disc 110.

[0068] In the embodiment, the rotating positioning and locking module 120 further comprises a first signal switch 126; during the process that the release driving member 122 drives the release switch 123 to move from the second position to the first position, when the release switch 123 triggers the first signal switch 126, the release driving member 122 stops, so that the release switch 123 can push the locking bolt 124 to move from the extended locking position to the retracted release position, i.e. the locking bolt 124 is separated from the slot hole of the rotating disc 110, so as to realize the release of the rotating disc 110.

[0069] The rotating positioning and locking module 120 further comprises a second signal switch 127; during the process that the release driving member 122 drives the release switch 123 to move from the first position to the second position, when the release switch 123 triggers the second signal switch 127, the release driving member 122 stops, so that the locking bolt 124 can move to the extended locking position under the action of the reset spring 125, so as to be inserted into the slot hole to realize the locking of the rotating disc 110.

[0070] In the embodiment, the release driving member 122 comprises a motor, and the release switch 123 can rotate under the driving of the release driving member 122, wherein the release switch 123 has a first pushing guide surface 1230; the locking bolt 124 has a pushing column 1240 with a second pushing guide surface 1241, the first pushing guide surface 1230 can be in sliding contact or separated from the second pushing guide surface 1241, so that the release switch 123 can push the locking bolt 124 more smoothly through the first pushing guide surface 1230 and the second pushing guide surface 1241. The first pushing guide surface 1230 can be a circular arc surface, and the second pushing guide surface 1241 can be an inclined surface.

[0071] It should be noted that the handle signal switch 133, the first signal switch 126 and the second signal switch 127 can all be micro switches, and of course can also be other trigger switches or proximity switches.

[0072] In addition, the handle signal switch 133, the first signal switch 126, the second signal switch 127, and the release driving element 122 all need to be connected (for example, wirelessly connected) with a controller of the control panel to realize automatic program execution. The controller is usually a central processing unit (CPU), and can be configured with a corresponding operating system, a control interface, and the like. Specifically, the controller can be a digital logic control unit such as a single-chip microcomputer, a digital signal processing (DSP), an advanced RISC machine (ARM) processor, or the like, which can be used for automatic control. The control instructions can be loaded into the memory at any time for storage and execution. Meanwhile, the CPU instructions and data memory, input and output units, power modules, digital and analog units, and the like can be built in. The actual use can be set, and the embodiments of the present application do not limit this.

[0073] The working principle of the child seat of the present embodiment is as follows:

[0074] Reference Figure 8 When the chair back 200 needs to be rotated, the adjusting handle 132 is first manually operated. The trigger part 1320 of the adjusting handle 132 triggers the lower handle signal switch 133. At this time, the handle signal switch 133 generates a signal and transmits the signal to the rotary positioning locking module 120. At this time, the release driving element 122 in the rotary positioning locking module 120 drives the release switch 123 to rotate. In this way, the release switch 123 rotates from the second position to the first position. When the release switch 123 rotates to the position where the locking plug 124 is touched, the locking plug 124 moves from the extended locking position to the retracted release position under the action of the torsion force of the release switch 123 driven by the release motor. When the locking plug 124 moves to the set stroke, the release switch 123 reaches the first position (see Figure 7 ), which triggers the first signal switch 126. The release motor stops rotating at this time. At this time, the locking plug 124 is separated from the rotary disc 110, and the rotary disc 110 is in the release state. The chair can be manually rotated to the direction of the desired rotation angle.

[0075] After rotating to a certain angle (as shown in Figure 9 ), the adjusting handle 132 is released, and the trigger part 1320 triggers the lower handle signal switch 133 again. At this time, the release driving element 122 reversely rotates to drive the release switch 123 to rotate from the first position to the second position. When the release switch 123 rotates to the position of the second signal switch 127, the release switch 123 reaches the second position (see Figure 6), the second signal switch 127 is triggered, the release driving member 122 stops, at this time the locking bolt 124 is compressed under the gravity of the chair back 200 below the rotating disc 110, when the chair back 200 rotates to the required angle, at this time the angle gear hole of the rotating disc 110 is aligned with the locking bolt 124, the locking bolt 124 is locked on the rotating disc 110 under the action of the reset spring 125, so that the chair completes the required rotation angle;

[0076] Reference Figures 10 to 12 When the reclining angle of the chair back 200 needs to be adjusted, the reclining angle driving member 320 starts to drive the screw rod 330 to rotate, the screw rod sliding seat 340 is driven to move forward and backward by the rotation of the screw rod 330, and the screw rod 330 slides on the screw rod 330 to drive the connecting shaft 360 to push the chair back 200 to slide in the sliding groove 111 of the rotating disc 110 to adjust the reclining angle.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A chair seat mechanism, characterized by The base (100), the rotating disc (110), the rotating positioning locking module (120) and the handle module (130) are included. The rotating disc (110) is rotatably arranged on the base (100), and the rotating disc (110) is used for fixing a chair back (200). The handle module (130) includes a handle seat (131), a handle signal switch (133) arranged on the handle seat (131), and an adjusting handle (132) movably arranged on the handle seat (131). When the adjusting handle (132) moves relative to the handle seat (131), the adjusting handle (132) can trigger the handle signal switch (133). The handle seat (131) is used for being fixed on the lower side of the chair back (200). The rotating positioning locking module (120) is arranged on the base (100) and is used for locking the rotating disc (110). The rotating positioning locking module (120) can lock or release the rotating disc (110) when the handle signal switch (133) is triggered.

2. The seat mechanism according to claim 1, characterized in that One side of the handle seat (131) facing the adjusting handle (132) is provided with a mounting groove (1310), and the handle signal switch (133) is arranged in the mounting groove (1310). And / or, The adjusting handle (132) is provided with a trigger part (1320) for triggering the handle signal switch (133) when the adjusting handle (132) moves relative to the handle seat (131). And / or, The handle module (130) further includes a handle reset elastic member (134) arranged between the handle seat (131) and the adjusting handle (132).

3. The seat mechanism of claim 1, wherein The rotating positioning locking module (120) includes a module shell (121), a release locking driving member (122) arranged on the module shell (121), and a release locking assembly connected with the release locking driving member (122). The release locking driving member (122) is used for driving the release locking assembly to move relative to the module shell (121) when the handle signal switch (133) is triggered, so that the release locking assembly locks or releases the rotating disc (110).

4. The seat mechanism of claim 3, wherein The release locking assembly includes a release locking switch (123) and a locking bolt (124). The locking bolt (124) is slidably arranged on the module shell (121) and can move between an extended locking position and a retracted release locking position. When the locking bolt (124) is located at the extended locking position, the rotating disc (110) can be locked. When the locking bolt (124) is located at the retracted release locking position, the rotating disc (110) can be released. The release switch (123) is connected with the release driving member (122), and can move relative to the module shell (121) between a first position and a second position under the driving of the release driving member (122), when the release switch (123) is located at the first position, the release switch (123) can limit the locking bolt (124) at the retracted release position, when the release switch (123) is at the second position, the release switch (123) can return to the extended locking position.

5. The seat mechanism of claim 4, wherein, The release assembly further comprises a reset spring (125) arranged between the module shell (121) and the locking bolt (124), for making the locking bolt (124) have a movement tendency from the retracted release position to the extended locking position.

6. A seat mechanism according to claim 4 or 5, characterised in that, The rotary positioning locking module (120) further comprises a first signal switch (126); During the process that the release driving member (122) drives the release switch (123) to move from the second position to the first position, when the release switch (123) triggers the first signal switch (126), the release driving member (122) stops.

7. A seat mechanism according to claim 4 or 5, characterised in that, The rotary positioning locking module (120) further comprises a second signal switch (127); During the process that the release driving member (122) drives the release switch (123) to move from the first position to the second position, when the release switch (123) triggers the second signal switch (127), the release driving member (122) stops.

8. A seat mechanism according to claim 4 or 5, characterised in that, The release driving member (122) comprises a motor, and the release switch (123) can rotate under the driving of the release driving member (122), wherein the release switch (123) has a first pushing guide surface (1230); The locking bolt (124) has a pushing column (1240) having a second pushing guide surface (1241), and the first pushing guide surface (1230) can be in sliding contact or separated from the second pushing guide surface (1241).

9. A child seat, characterized in that The chair back (200) and the seat mechanism according to any one of claims 1-8 are included. The chair back (200) is fixed on the rotary disc (110). The handle seat (131) is fixed on the lower side of the chair back (200).

10. The child seat of claim 9, wherein, The child seat further comprises a reclining angle adjusting mechanism (300) for driving the chair back (200) to slide relative to the rotary disc (110) to change the inclination angle of the chair back (200) relative to the rotary disc (110).

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