Manually-adjusted back-chasing mechanism

Abstract

The utility model relates to the field of chairs, and particularly discloses a manually-adjusted back-chasing mechanism, which comprises a fixing piece, a back-chasing mechanism, a back-chasing mechanism and a back-chasing mechanism, and one end of the fixing piece is provided with a first connecting part used for connecting a chair rod of a chair seat; a second connecting part for mounting the backrest is arranged at one end of the adjusting part, and the adjusting part can move relative to the fixing part so as to change the horizontal distance between the first connecting part and the second connecting part; a plurality of locking grooves are formed in the fixing part in the moving direction of the adjusting part, locking teeth embedded into the locking grooves are arranged on the adjusting part, a locking part is rotationally arranged on the adjusting part, an extrusion block for driving the locking teeth to be embedded into the locking grooves is arranged on the locking part, and a displacement groove for the extrusion block to move and far away from the locking teeth is formed in the adjusting part; and when rotating along with the lock piece, the lock teeth are driven to be embedded into the lock groove and the lock teeth are completely separated from the lock groove. The method has the effect of rapid adjustment.

Description

Technical Field

[0001] This application relates to the field of chairs, and in particular to manually adjustable backrest mechanisms. Background Technology

[0002] Currently, to make children's chairs more comfortable, a backrest structure is usually installed on them.

[0003] Existing backrest-following structures, such as the Chinese patent with publication number CN220832486U in related technologies, mainly use the method of pressing down the seat to drive the backrest to follow the back. This method has a specific backrest-following stroke and cannot well adapt to everyone's situation. Utility Model Content

[0004] In order to adjust the position of the backrest to suit the needs of different people, this application provides a manually adjustable backrest mechanism.

[0005] The manually adjustable tailgating mechanism provided in this application adopts the following technical solution:

[0006] include:

[0007] The fastener has a first connecting portion at one end for connecting the chair rod to the seat;

[0008] An adjusting member has a second connecting part at one end for mounting the backrest. The adjusting member can move relative to the fixed member to change the horizontal distance between the first connecting part and the second connecting part.

[0009] The fixing member has several locking grooves along the moving direction of the adjusting member. The adjusting member has locking teeth that are embedded in the locking grooves. A locking member is rotatably mounted on the adjusting member. The locking member has a pressing block that drives the locking teeth to be embedded in the locking grooves. The adjusting member has a displacement groove that allows the pressing block to move away from the locking teeth. The adjusting member has two states when rotating with the locking member: the locking teeth are driven to be embedded in the locking grooves and the locking teeth are completely disengaged from the locking grooves.

[0010] By adopting the above technical solution, the locking component drives the pressing block to move, and the pressing block presses the locking teeth, causing the locking teeth to embed into the locking groove and form a certain jamming state with the locking groove, thereby axially locking the fixing component and the adjusting component. At this time, the adjusting component cannot move relative to the fixing component. During adjustment, the locking component needs to be rotated to move the pressing block away from the locking teeth and into the displacement groove, separating it from the locking teeth, so that the locking teeth are completely disengaged from the locking groove. At this time, because the locking teeth are spaced apart from the outer wall of the rod, the adjusting component can be moved.

[0011] In one possible implementation, the adjusting member has a slot, a deformation plate is installed in the slot, one end of the deformation plate is fixedly connected to the locking tooth, and a through hole is provided on the deformation plate for the insertion of the extrusion block.

[0012] In one possible implementation, the adjusting member has a receiving cavity, the fixing member has a rod inserted into the receiving cavity, a limiting groove is formed on the inner wall of the receiving cavity, and a limiting block is provided on the rod that is embedded in the limiting groove.

[0013] In one possible implementation, the first connecting part is a connecting ring integrally formed with the rod body.

[0014] In one possible implementation, the adjusting member includes a sleeve and a connecting arm integrally formed on one end of the sleeve, with a second connecting portion integrally formed on the connecting arm.

[0015] In one possible implementation, the second connection portion includes a slot, which includes a first groove and a second groove, the first groove being larger than the second groove, and the second groove being located outside the first groove.

[0016] In one possible implementation, the lock is a ring-shaped structure with several protrusions evenly distributed along the circumference on the outer wall of the lock.

[0017] In one possible implementation, the lock includes an outer ring and an inner ring, with a pressing block located on the inner wall of the inner ring and a protrusion located on the outer end wall of the outer ring. The inner ring has a slot, and the outer ring has a locking block that mates with the slot.

[0018] In one possible implementation, a second slot is provided on the outer ring, and a second block is provided on the inner ring to cooperate with the second slot.

[0019] In one possible implementation, multiple locking teeth are arranged in a pattern.

[0020] In summary, this application includes the following beneficial technical effects: the chasing mechanism can be quickly adjusted by rotating the locking component. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0022] Figure 2 This is a structural schematic diagram of a part of the embodiment, mainly showing the fastener;

[0023] Figure 3 This is a structural schematic diagram of a part of the embodiment, mainly showing the adjusting component;

[0024] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0025] Figure 5 This is a structural schematic diagram of a part of the embodiment, mainly showing the locking component;

[0026] Figure 6This is a cross-sectional schematic diagram of an embodiment;

[0027] Figure 7 yes Figure 6 Enlarged diagram of part B.

[0028] Reference numerals: 1. Fixing component; 2. Adjusting component; 3. First connecting part; 4. Second connecting part; 5. Receiving cavity; 6. Rod body; 7. Connecting ring; 8. Sleeve; 9. Connecting arm; 10. Limiting groove; 11. Limiting block; 12. First groove body; 13. Second groove body; 14. Locking groove; 15. Locking tooth; 16. Locking component; 17. Extrusion block; 18. Displacement groove; 19. Groove opening; 20. Deformation plate; 21. Through hole; 22. Protrusion; 23. Outer ring; 24. Inner ring; 25. First slot; 26. First block; 27. Second slot; 28. Second block. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0030] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0031] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0032] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] Reference Figure 1-7The manually adjustable backrest mechanism includes a fixing member 1 and an adjusting member 2. One end of the fixing member 1 has a first connecting part 3 for connecting the chair rod to the seat; one end of the adjusting member 2 has a second connecting part 4 for mounting the backrest. The adjusting member 2 can move relative to the fixing member 1 to change the horizontal distance between the first connecting part 3 and the second connecting part 4.

[0034] Specifically, the adjusting member 2 has a receiving cavity 5, the fixing member 1 has a rod 6 inserted into the receiving cavity 5, and the first connecting part 3 is a connecting ring 7 integrally formed with the rod 6. The connecting ring 7 has a racetrack-shaped structure. During installation, the connecting ring 7 is fitted onto the seat rod and locked with a pin.

[0035] The adjusting component 2 includes a sleeve 8 and a connecting arm 9 integrally formed on one end of the sleeve 8. The second connecting part 4 is integrally formed on the connecting arm 9, and the receiving cavity 5 is located inside the sleeve 8. In order to prevent the sleeve 8 from rotating relative to the sleeve when it moves, a limiting groove 10 is formed on the inner wall of the receiving cavity 5, and a limiting block 11 is provided on the rod 6 that is embedded in the limiting groove 10.

[0036] The second connecting part 4 includes a slot with openings at the top and on the side closest to the human body, and a closed bottom. The slot includes a first groove 12 and a second groove 13, where the first groove 12 is larger than the second groove 13, and the second groove 13 is located outside the first groove 12. During installation, the protrusion 22 on the backrest corresponding to the slot is inserted into the slot.

[0037] The rod body 6 has several locking grooves 14 along the moving direction of the sleeve 8. The adjusting member 2 has locking teeth 15 that are embedded in the locking grooves 14. A locking member 16 is rotatably mounted on the adjusting member 2. The locking member 16 has a pressing block 17 that drives the locking teeth 15 to be embedded in the locking grooves 14. The adjusting member 2 has a displacement groove 18 that allows the pressing block 17 to move away from the locking teeth 15. The adjusting member 2 has two states: when it moves with the pressing block 17, the locking teeth 15 are driven to be embedded in the locking grooves 14, and the locking teeth 15 are completely disengaged from the locking grooves 14. The locking member 16 drives the pressing block 17 to move, and the pressing block 17 presses the locking teeth 15, causing the locking teeth 15 to be embedded in the locking grooves 14, forming a certain jamming state with the locking grooves 14. This locks the fixing member 1 and the adjusting member 2 axially. At this time, the adjusting member 2 cannot move relative to the fixing member 1. During adjustment, the locking element 16 needs to be rotated to move the pressing block 17 away from the locking tooth 15 and into the displacement groove 18, separating it from the locking tooth 15, so that the locking tooth 15 is completely disengaged from the locking groove 14. At this time, since the locking tooth 15 is spaced apart from the outer wall of the rod body 6, the adjusting element 2 can be moved.

[0038] Multiple locking grooves 14 are formed on the rod body 6 and arranged along the axial direction of the rod body 6. The cross-section of the locking grooves 14 is similar to an isosceles trapezoid. The locking grooves 14 extend along the circumference of the rod body 6 and the extension angle is generally 30-40 degrees.

[0039] The adjusting component 2 has a slot 19, and a deformation plate 20 is installed in the slot 19. One end of the deformation plate 20 is fixedly connected to the locking tooth 15. The deformation plate 20 has a through hole 21 for the insertion of the extrusion block 17. The through hole 21 is connected to the displacement groove 18 and is arranged parallel to each other. The deformation plate 20 can be made of rubber or other materials. The extrusion plate extrudes and deforms the deformation plate 20, causing the locking tooth 15 on the deformation plate 20 to embed into the locking groove 14.

[0040] The locking element 16 has a ring-shaped structure, and several protrusions 22 are evenly distributed along the circumference on the outer wall of the locking element 16.

[0041] The locking component 16 includes an outer ring 23 and an inner ring 24; a pressing block 17 is located on the inner wall of the inner ring 24, and a protrusion 22 is located on the outer end wall of the outer ring 23. A first slot 25 is provided on the inner ring 24, and a first locking block 26 that cooperates with the first slot 25 is provided on the outer ring 23; a second slot 27 is provided on the outer ring 23, and a second locking block 28 that cooperates with the second slot 27 is provided on the inner ring 24.

[0042] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0043] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A manually adjustable tailgating mechanism, characterized in that: include: The fastener (1) has a first connecting part (3) at one end for connecting the chair rod to the seat; The adjusting member (2) has a second connecting part (4) for mounting the backrest at one end. The adjusting member (2) can move relative to the fixing member (1) to change the horizontal distance between the first connecting part (3) and the second connecting part (4). The fixing member (1) has a plurality of locking grooves (14) along the moving direction of the adjusting member (2). The adjusting member (2) has locking teeth (15) that are embedded in the locking grooves (14). A locking member (16) is rotatably provided on the adjusting member (2). The locking member (16) has a pressing block (17) that drives the locking teeth (15) to be embedded in the locking grooves (14). The adjusting member (2) has a displacement groove (18) that allows the pressing block (17) to move away from the locking teeth (15). The adjusting member (2) has two states when rotating with the locking member (16): the locking teeth (15) are driven to be embedded in the locking grooves (14) and the locking teeth (15) are completely disengaged from the locking grooves (14).

2. The manually adjustable back-tracking mechanism according to claim 1, characterized in that: The adjusting member (2) has a slot (19) and a deformation plate (20) is installed in the slot (19). One end of the deformation plate (20) is fixedly connected to the locking tooth (15). The deformation plate (20) has a through hole (21) for the extrusion block (17) to be inserted.

3. The manually adjustable back-tracking mechanism according to claim 1, characterized in that: The adjusting member (2) has a receiving cavity (5), the fixing member (1) has a rod (6) inserted into the receiving cavity (5), a limiting groove (10) is opened on the inner wall of the receiving cavity (5), and a limiting block (11) is provided on the rod (6) and embedded in the limiting groove (10).

4. The manually adjustable back-tracking mechanism according to claim 3, characterized in that: The first connecting part (3) is a connecting ring (7) integrally formed with the rod body (6).

5. The manually adjustable back-tracking mechanism according to claim 1, characterized in that: The adjusting member (2) includes a sleeve (8) and a connecting arm (9) integrally formed on one end of the sleeve (8), and the second connecting part (4) is integrally formed on the connecting arm (9).

6. The manually adjustable chasing mechanism according to claim 5, characterized in that: The second connecting part (4) includes a slot, which includes a first slot (12) and a second slot (13). The size of the first slot (12) is larger than the size of the second slot (13), and the second slot (13) is located outside the first slot (12).

7. The manually adjustable tailgating mechanism according to claim 1, characterized in that: The locking element (16) has a ring-shaped structure, and a number of protrusions (22) are evenly distributed along the circumferential direction on the outer wall of the locking element (16).

8. The manually adjustable chasing mechanism according to claim 7, characterized in that: The locking element (16) includes an outer ring (23) and an inner ring (24). The pressing block (17) is located on the inner wall of the inner ring (24), and the protrusion (22) is located on the outer end wall of the outer ring (23). The inner ring (24) has a slot, and the outer ring (23) has a locking block that cooperates with the slot.

9. The manually adjustable chasing mechanism according to claim 8, characterized in that... The outer ring (23) is provided with a second slot (27), and the inner ring (24) is provided with a second block (28) that cooperates with the second slot (27).

10. The manually adjustable back-tracking mechanism according to claim 1, characterized in that: The locking teeth (15) are arranged in multiple ways.

Images