Adjustable seat post locking joint and method of use

Abstract

The application discloses an adjustable seat locking joint, which comprises a connecting assembly, a seat plate and a backrest which are rotatably connected with the connecting assembly, a first locking element arranged between the backrest and the connecting assembly, a second locking element arranged between the seat plate and the connecting assembly, and a first transmission element which is in transmission cooperation with the second locking element. The application also provides a method for using the adjustable seat locking joint. When the backrest rotates relative to the connecting assembly within the angle adjustment range of the backrest, the operating element cannot release the locking of the second locking element. When the backrest and the seat plate rotate towards each other and exceed the angle adjustment range of the backrest, the backrest is in a non-use state, and the operating element can release the locking of the second locking element. The seat plate and the connecting assembly are kept in a movable state, so that the folding of the locking joint relative to the front and back directions of a vehicle frame is realized, the installation angle of the connecting assembly and the vehicle frame is adjusted, and the adjustment flexibility is improved.

Description

Technical Field

[0001] This invention relates to the field of children's stroller technology, specifically to an adjustable seat locking joint and its usage method. Background Technology

[0002] Strollers have become an essential tool for infants and toddlers when traveling. Currently, when folding a stroller, the user needs to unlock the locking mechanism first to allow the various parts to fold. However, in general, the fit between the seat and frame of existing folding strollers is not high, and the seat locking joint can only be adjusted in one direction relative to the frame, either forward or backward, resulting in limited adjustment flexibility.

[0003] Therefore, how to overcome the shortcomings of the existing technology is the subject of this invention. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable seat locking joint and its method of use.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an adjustable seat locking joint, comprising a connecting component, a seat plate rotatably assembled with the connecting component, and a backrest, wherein the seat plate is rotatably assembled with the backrest connecting component of the backrest along an axis via a seat plate connecting member, characterized in that: it includes a first locking element disposed between the backrest and the connecting component; it also includes a second locking element disposed between the seat plate and the connecting component; wherein the first locking element and the second locking element are in a transmission engagement, and the second locking element can be unlocked by the first locking element.

[0006] In a further technical solution, the connecting assembly consists of a first connecting seat, a second connecting seat, and a third connecting seat in sequence from the outside to the inside along the axis. The first connecting seat is connected to the second connecting seat, the second connecting seat is coaxially rotatably assembled with the seat plate connector, and the third connecting seat is coaxially embedded in the annular body of the seat plate connector and fixedly connected to the second connecting seat.

[0007] In a further technical solution, a boss is provided on the second connecting seat, and the boss is disposed in a swing groove, which is located at the inner bottom of the seat plate connector.

[0008] A further technical solution is that the first locking element is slidably disposed in a groove, the groove being radially disposed on the backrest connector and achieving rotational limitation; the locking end of the first locking element is provided with a locking tongue, and a plurality of locking slots are spaced apart on the locking part around the axis; in the locked state, the locking tongue is inserted into any locking slot on the locking part of the third connecting seat; the third connecting seat is also provided with an arc groove structure, the arc groove structure being in a closed loop connection with the locking part in the third connecting seat.

[0009] A further technical solution is that the arc groove structure includes a short-diameter arc groove and a long-diameter arc groove, the radius of the short-diameter arc groove to the center of the third connecting seat is smaller than the radius of the long-diameter arc groove to the center of the third connecting seat; in the unlocked state, the short-diameter arc groove and the abutting end provided at the tail of the first locking element abut against each other, and the radial distance between the short-diameter arc groove and the abutting end is greater than or equal to the length of the locking tongue, or the radial distance is greater than or equal to the depth of the locking socket; the difference in radial distance between the short-diameter arc groove and the long-diameter arc groove corresponds to the axial movement distance of the first transmission member.

[0010] In a further technical solution, a first transmission member is provided between the first locking element and the second locking element. One end of the first transmission member is radially abutted against the first locking element, and the other end is axially abutted against the second locking element. The first locking element is also connected to a second transmission member. The second transmission member is concealed in the backrest rod provided on the backrest and extends to the operating member provided on the backrest, so that the first locking element is connected to the operating member through the second transmission member.

[0011] In a further technical solution, the second locking element is disposed inside the connecting assembly along the axial direction, and in the locked state, the second locking element acts between the first connecting seat and the second connecting seat.

[0012] In a further technical solution, the surface of the first transmission component is provided with a second inclined surface, and the second inclined surface abuts against and cooperates with the first inclined surface provided on the surface of the first locking element.

[0013] The present invention also provides a method for using an adjustable seat locking joint, the method specifically including the following steps:

[0014] Step 1: When the backrest rotates relative to the connecting assembly within its angle adjustment range, the backrest is in use, and its operating mechanism cannot release the second locking element, thereby keeping its seat locking joint locked.

[0015] Step 2: When the backrest and the seat rotate close to each other and exceed the angle adjustment range of the backrest, the backrest is put into a non-use state. The operating component can release the lock of the second locking element, thereby completely unlocking its seat locking joint.

[0016] Steps one and two can be changed in sequence according to the actual adjustment needs of the sitting base locking joint.

[0017] In the above scheme, in the locked state, the locking end of the first locking element is inserted into the locking part of the third connecting seat, so that the backrest connector and the seat plate connector are locked, thereby locking the position of the backrest and the seat plate; at the same time, the second locking element enters the second connecting seat to lock the position of the first connecting seat and the second connecting seat.

[0018] In the above scheme, in the unlocked state, the locking end of the first locking element disengages from the locking part of the third connecting seat, thereby unlocking the backrest connector and the seat plate connector, and thus unlocking the position of the backrest and the seat plate; at the same time, the second locking element enters the first connecting seat under the driving action of the first transmission member, unlocking the position of the first connecting seat and the second connecting seat, and thus unlocking the position of the connecting assembly and the seat plate.

[0019] The working principle and advantages of this invention are as follows:

[0020] The structure of this design is simple, easy to fold, and low in cost. The seat plate and connecting components can always remain in an active state, and the backrest can fold and rotate relative to the connecting components toward the seat plate in order to achieve the folding of the locking joint relative to the front and rear directions of the frame, resulting in high flexibility of adjustment.

[0021] In addition, the first locking element in this case can drive the second locking element to lock or unlock, so as to adjust the installation angle of the connecting components and effectively improve the installation compatibility between the seat and the frame. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0023] Appendix Figure 2 This is a schematic diagram of the structure of the present invention with the child protection device installed in the correct position according to an embodiment;

[0024] Appendix Figure 3 Explosion of the sitting base locking joint in an embodiment of the present invention Figure 1 ;

[0025] Appendix Figure 4 Explosion of the sitting base locking joint in an embodiment of the present invention Figure 2 ;

[0026] Appendix Figure 5 This is a partial side view of the locked state according to an embodiment of the present invention;

[0027] Appendix Figure 6This is a partial side view of the first locking element in the unlocked state according to an embodiment of the present invention;

[0028] Appendix Figure 7 This is a partial side view of the first locking element and the second locking element in the simultaneously unlocked state according to an embodiment of the present invention;

[0029] Appendix Figure 8 This is a schematic diagram illustrating the driving relationship between the first locking element, the second locking element, and the first transmission member in an embodiment of the present invention.

[0030] In the above attached figures: 1. Seat plate; 1-1. Seat plate connector; 1-1-1. Swing groove; 2. Backrest; 2-1. Backrest connector; 2-1-1. Groove; 3. Connecting assembly; 3-1. First connecting seat; 3-1-1. First toothed groove; 3-2. Second connecting seat; 3-2-1. Mounting interface; 3-2-2. First toothed groove; 3-2-3. Boss; 3-3. Third connecting seat; 3-3-1. Mounting block; 3-3-2. Arc groove structure; 3-3-2-1. Short diameter arc groove; 3-3-2-2. Long diameter arc groove; 3-3-3. Locking socket; 4. First locking element; 4-1. Abutment end; 4-2. Locking tongue; 4-3. First inclined surface; 5. Second locking element; 6. First transmission component; 6-1. Second inclined surface; 7. Second transmission component; 8. 9. Backrest bar; 10. Operating element; 11. First elastic element; 12. Second elastic element; 13. Child safety device; a. Axis. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0033] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0034] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0035] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0036] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0037] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0038] The terms “front,” “back,” “up,” and “down” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not used to limit the specific direction of the protection scheme and its actual implementation.

[0039] See appendix Figures 1-4 As shown, an adjustable seat locking joint of this embodiment includes a seat plate 1, a backrest 2 and a connecting assembly 3. The head of the seat plate 1 is symmetrically fixed with a ring-shaped seat plate connector 1-1. The head of the backrest 2 is symmetrically fixed with a disc-shaped backrest connector 2-1 that is adapted to and installed with the seat plate connector 1-1. A child protection device 12 is movably connected to the connecting assembly 3 for preventing children from falling.

[0040] In this invention: taking the vertical center line of the base as a reference, the side closer to the center line is defined as the inner side, and the side farther from the center line is defined as the outer side.

[0041] The seat includes a seat plate 1 and a backrest 2. The seat plate 1 is rotatably assembled with the backrest 2 via a seat plate connector 1-1 and a backrest connector 2-1 along an axis a. The seat locking joint includes a connecting component 3, which consists of a first connecting seat 3-1, a second connecting seat 3-2, and a third connecting seat 3-3 along the axis a from the outside to the inside.

[0042] The third connecting seat 3-3 is coaxially embedded in the annular structure of the seat plate connector 1-1 and is fixedly connected to the second connecting seat 3-2 located on the outside of the seat plate connector 1-1. The first connecting seat 3-1 is rotatably assembled on the outside of the second connecting seat 3-2.

[0043] The first locking element 4 slides radially along the backrest connector 2-1 and is assembled in the backrest connector 2-1, achieving rotation limit; the locking end of the first locking element 4 is provided corresponding to a locking part in the third connecting seat 3-3, and the first elastic member 10 maintains the tendency to move away from the locking part.

[0044] The first locking element 4 is coupled with a second locking element 5, which can be unlocked by the first locking element 4. The second locking element 5 is located between the first connecting seat 3-1 and the second connecting seat 3-2, and is kept moving away from the first connecting seat 3-1 by the second elastic member 11.

[0045] The second connecting seat 3-2 has a boss 3-2-3, which is disposed in a swing groove 1-1-1 located at the inner bottom of the seat plate connector 1-1. The boss 3-2-3 swings within the swing groove 1-1-1, and the two can form a uniform swing angle between the seat plate connector 1-1 and the second connecting seat 3-2. This configuration provides unidirectional limiting between the seat plate 1 and the connecting assembly 3, ensuring that the seat plate 1 remains in an active state. Furthermore, the backrest 2 can rotate relative to the second connecting seat 3-2 towards the seat plate 1, enabling folding in the front-to-back direction.

[0046] See appendix Figures 5-8 As shown, a plurality of locking slots 3-3-3 are spaced apart on the locking part around the axis a; the third connecting seat 3-3 is also provided with an arc groove structure 3-3-2, which is in a closed loop connection with the locking part in the third connecting seat 3-3.

[0047] When it is necessary to change the opening angle of the seat plate 1 and the backrest 2, the locking tongue 4-2 can be unlocked and engaged with the current locking socket 3-3-3. Then, the backrest 2 can be rotated to align the locking tongue 4-2 with the locking socket 3-3-3 corresponding to the required opening angle. After locking, the angle of the backrest 2 can be adjusted.

[0048] The radial distance difference between the short-diameter arc groove 3-3-2-1 and the long-diameter arc groove 3-3-2-2 corresponds to the radial movement distance of the first locking element 4. The radial movement distance of the first locking element 4 corresponds to the axial movement distance of the first transmission member 6. The axial movement distance of the first transmission member 6 corresponds to the axial movement distance of the second locking element 5 disengaging from the second connecting seat 3-2. The radial distance difference between the short-diameter arc groove 3-3-2-1 and the long-diameter arc groove 3-3-2-2 allows the first locking element 4 to move a sufficient distance to drive the first transmission member 6 to translate along axis a, thereby pushing the second locking element 5 completely disengage from the second connecting seat 3-2.

[0049] The first locking element 4 is slidably disposed in a groove 2-1-1 via the first elastic member 10. The groove 2-1-1 is disposed on the backrest connector 2-1. The locking end of the first locking element 4 is provided with a locking tongue 4-2, which is locked and connected to the locking socket 3-3-3 provided in the third connecting seat 3-3 via the locking tongue 4-2.

[0050] A first transmission member 6 is provided between the first locking element 4 and the second locking element 5. One end of the first transmission member 6 cooperates with the inclined surface 4-3 provided on the surface of the first locking element 4, and the other end of the first transmission member 6 abuts against the second locking element 5. The first locking element 4 is slidably embedded in the groove 2-1-1 provided on the backrest connector 2-1. The abutting end 4-1 provided at its tail end abuts against the second transmission member 7 through the first elastic member 10 with vibration absorption function. The second transmission member 7 is hidden in the backrest rod 8 provided on the backrest 2 and extends to the operating member 9 provided on the backrest 2, so that the first locking element 4 is connected to the operating member 9 in sequence through the second transmission member 7, the backrest rod 8 and the operating member 9.

[0051] In this embodiment, an adjustable seat locking joint is used as follows: When the backrest 2 is in use, in the locked state, the first locking element 4 is subjected to the force of the first elastic member 10. The first elastic member 10 acts between the first locking element 4 and the backrest connector 2-1, causing the locking tongue 4-2 to maintain a tendency to move toward the locking socket 3-3-3, so that the backrest connector 2-1 and the seat connector 1-1 are locked, thereby locking the position of the backrest 2 and the seat 1; at the same time, the second locking element 5 is subjected to the force of the second elastic member 11 and enters the second connecting seat 3-2, locking the position of the first connecting seat 3-1 and the second connecting seat 3-2.

[0052] When the backrest 2 is not in use, the locking end of the first locking element 4 is disengaged from the locking part of the third connecting seat 3-3 by the action of the first elastic element 10, thereby unlocking the backrest connector 2-1 and the seat board connector 1-1, and thus unlocking the position of the backrest 2 and the seat board 1; when the backrest 2 and the seat board 1 rotate toward each other, the second locking element 5 enters the first connecting seat 3-1 under the driving action of the first locking element 4, unlocking the position of the first connecting seat 3-1 and the second connecting seat 3-2, and thus unlocking the position of the connecting assembly 3 and the seat board 1.

[0053] In a specific embodiment: the first elastic element 10 and the first locking element 4 are both disposed in the groove 2-1-1, and the head of the first elastic element 10 abuts against the abutting end 4-1, and the tail of the first elastic element 10 abuts against the backrest connector 2-1.

[0054] In the locked state, the locking tongue 4-2 is held in the locking socket 3-3-3 by the action of the first elastic element 10; when unlocking, the first locking element 4 is pulled by the second transmission element 7. The pulling force is greater than the force of the first elastic element 10 on the locking tongue 4-2, thereby causing the locking tongue 4-2 to disengage from the locking socket 3-3-3.

[0055] The first connecting seat 3-1 and the second connecting seat 3-2 abut against each other, and the adjacent surfaces of the two are respectively provided with a first toothed groove 3-1-1 and a second toothed groove 3-2-2. The second locking element 5 slides axially between the first toothed groove 3-1-1 and the second toothed groove 3-2-2 so as to unlock or lock the second locking element 5.

[0056] The second connector 3-2 has symmetrically distributed mounting interfaces 3-2-1 on the side near the third connector 3-3, and the corresponding third connector 3-3 has mounting blocks 3-3-1 that are adapted to the mounting interfaces 3-2-1. The fixed connection between the mounting interfaces 3-2-1 and the mounting blocks 3-3-1 can enhance the installation firmness between the second connector 3-2 and the third connector 3-3.

[0057] In use: When the first locking element 4 rotates to the arc groove 3-3-2 in the third connecting seat 3-3, the locking tongue 4-2 disengages from either locking slot 3-3-3, leaving the first locking element 4 in the unlocked state. Then, the inclined surface 4-3 drives the first transmission member 6 to slide axially toward the first connecting seat 3-1. Simultaneously, the second locking element 5, under the force of the second elastic member 11, enters the second toothed groove 3-2-2 on the second connecting seat 3-2 for locking. When the second locking element 5 holds the locking connection assembly 3, it ensures a stable and secure assembly between the connection assembly 3 and the corresponding frame.

[0058] As the first locking element 4 continues to move backward under the pull of the second transmission member 7, it rotates with the backrest 2 until the abutment end 4-1 has disengaged from the short-diameter arc groove 3-3-2-1 and entered the long-diameter arc groove 3-3-2-2. The first inclined surface 4-3 of the first locking element 4 presses against the second inclined surface 6-1 of the first transmission member 6. Through the interaction of the two inclined surfaces, the first transmission member 6 is driven to move along axis a. This, in turn, pushes the second locking element 5 to translate along axis a, causing it to completely disengage from the second connecting seat 3-2 and overcome the force of the second elastic member 11 to enter the first connecting seat 3-1. This unlocks the first connecting seat 3-1 and the second connecting seat 3-2, allowing the seat plate 1 and backrest 2 to be unlocked and fully folded. After successfully unlocking the second locking element 5, the installation angle of the connecting assembly 3 relative to the frame can be freely adjusted, effectively improving the fit between the seat and the frame and ensuring installation flexibility.

[0059] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An adjustable seat locking joint, comprising a connecting assembly (3), a seat plate (1) rotatably assembled with the connecting assembly (3), and a backrest (2), wherein the seat plate (1) is rotatably assembled with the backrest connecting member (2-1) of the backrest (2) along an axis (a) via a seat plate connector (1-1), characterized in that: It includes a first locking element (4), which is disposed between the backrest (2) and the connecting assembly (3); It also includes a second locking element (5), which is disposed between the base plate (1) and the connecting assembly (3); The first locking element (4) and the second locking element (5) are in a transmission engagement. The connecting assembly (3) consists of a first connecting seat (3-1), a second connecting seat (3-2), and a third connecting seat (3-3) from the outside to the inside along the axis (a). The first connecting seat (3-1) is connected to the second connecting seat (3-2). The second connecting seat (3-2) is coaxially rotatably assembled with the seat plate connector (1-1). The third connecting seat (3-3) is coaxially embedded in the annular body of the seat plate connector (1-1) and is fixedly connected to the second connecting seat (3-2). The second connecting seat (3-2) has a boss (3-2-3) which is located in a swing groove (1-1-1) at the bottom of the seat plate connector (1-1).

2. The adjustable seat locking joint according to claim 1, characterized in that: The first locking element (4) is slidably disposed in a groove (2-1-1), the groove (2-1-1) being radially disposed on the backrest connector (2-1) and achieving rotation limit; The first locking element (4) has a locking tongue (4-2) on its locking end, and multiple locking slots (3-3-3) are provided at intervals on the locking part around the axis (a). In the locked state, the latch (4-2) is inserted into any of the locking slots (3-3-3) on the locking part of the third connecting seat (3-3); The third connecting seat (3-3) is also provided with an arc groove structure (3-3-2), which is in a closed loop connection with the locking part in the third connecting seat (3-3).

3. The adjustable seat locking joint according to claim 2, characterized in that: The arc groove structure (3-3-2) includes a short-diameter arc groove (3-3-2-1) and a long-diameter arc groove (3-3-2-2). The radius of the short-diameter arc groove (3-3-2-1) to the center of the third connecting seat (3-3) is smaller than the radius of the long-diameter arc groove (3-3-2-2) to the center of the third connecting seat (3-3). In the unlocked state, the short-diameter arc groove (3-3-2-1) and the abutting end (4-1) provided at the tail of the first locking element (4) abut against each other, and the radial distance between the short-diameter arc groove (3-3-2-1) and the abutting end (4-1) is greater than or equal to the length of the locking tongue (4-2), or the radial distance is greater than or equal to the depth of the locking socket (3-3-3); The radial distance difference between the short-diameter arc groove (3-3-2-1) and the long-diameter arc groove (3-3-2-2) corresponds to the axial movement distance of the first transmission component (6).

4. The adjustable seat locking joint according to claim 1, characterized in that: A first transmission member (6) is provided between the first locking element (4) and the second locking element (5). One end of the first transmission member (6) is radially abutted against the first locking element (4), and the other end is axially abutted against the second locking element (5). The first locking element (4) is also connected to a second transmission member (7), which is hidden in the backrest rod (8) provided on the backrest (2) and extends to the operating member (9) provided on the backrest (2), so that the first locking element (4) is connected to the operating member (9) through the second transmission member (7).

5. The adjustable seat locking joint according to claim 1, characterized in that: The second locking element (5) is disposed inside the connecting assembly (3) along the axis (a) direction, and in the locked state, the second locking element (5) acts between the first connecting seat (3-1) and the second connecting seat (3-2).

6. The adjustable seat locking joint according to claim 4, characterized in that: The first transmission component (6) has a second inclined surface (6-1) on its surface, and the second inclined surface (6-1) abuts against the first inclined surface (4-3) on the surface of the first locking element (4).

7. A method of using the adjustable seat locking joint as described in any one of claims 1-6, characterized in that, The method specifically includes the following steps: Step 1: When the backrest (2) rotates relative to the connecting assembly (3) within its angle adjustment range, the backrest (2) is in use, and the operating part (9) cannot release the lock of the second locking element (5), thereby keeping its seat locking joint locked. Step 2: When the backrest (2) and the seat (1) rotate close to each other and exceed the angle adjustment range of the backrest (2), the backrest (2) is put into a non-use state. The second locking element (5) can be unlocked by the operating member (9), thereby completely unlocking its seat locking joint.

8. The method of using the adjustable seat locking joint according to claim 7, characterized in that: The seat locking joint has two states: locked and unlocked. In the locked state, the locking end of the first locking element (4) is inserted into the locking part of the third connecting seat (3-3), so that the backrest connector (2-1) and the seat plate connector (1-1) are locked, thereby locking the position state of the backrest (2) and the seat plate (1); At the same time, the second locking element (5) enters the second connecting seat (3-2) to lock the position of the first connecting seat (3-1) and the second connecting seat (3-2); In the unlocked state, the locking end of the first locking element (4) disengages from the locking part of the third connecting seat (3-3), thereby unlocking the backrest connector (2-1) and the seat board connector (1-1), and thus unlocking the position state of the backrest (2) and the seat board (1); At the same time, the second locking element (5) enters the first connecting seat (3-1) under the driving action of the first transmission member (6), unlocking the position of the first connecting seat (3-1) and the second connecting seat (3-2), thereby unlocking the position of the connecting component (3) and the seat plate (1).

Images