Rotary control back-chasing adjusting mechanism

Abstract

The utility model relates to the field of chairs, and particularly discloses a rotary control back-chasing adjusting mechanism, which comprises a fixing piece, a first connecting part, a second connecting part and a back-chasing adjusting part, 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 piece in the moving direction of the adjusting piece. A locking piece is rotationally connected to the adjusting piece, and the locking piece is provided with locking teeth sliding into the locking grooves; the adjusting part is provided with a movable groove for the lock teeth to move, the lock teeth have two states of sliding into the lock groove and being completely separated from the lock groove when rotating along with the lock part, and the lock part limits rotation of the lock part through friction force or a locking mechanism when the lock teeth slide into 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 a rotation control backrest adjustment mechanism. 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 adapt well to everyone's situation. Utility Model Content

[0004] In order to adjust the position of the rear-end position to meet the needs of different people, this application provides a rotation control rear-end adjustment mechanism.

[0005] The rotation control and back-mounted adjustment mechanism provided in this application adopts the following technical solution:

[0006] A rotation control tracking adjustment mechanism, characterized in that:

[0007] Includes a fastener, one end of which has a first connecting portion for connecting a chair rod to a chair 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; a locking member is rotatably connected to the adjusting member, and the locking member has locking teeth that slide into the locking grooves; the adjusting member has a movable groove for the locking teeth to move, and the locking teeth have two states when rotating with the locking member: sliding into the locking groove and completely disengaging from the locking groove. When the locking teeth slide into the locking groove, the locking member restricts the rotation of the locking member by friction or a locking mechanism.

[0010] Optionally, multiple locking teeth are arranged.

[0011] Optionally, the fixing member has an insertion part, the adjusting member has an insertion groove, the insertion part is located in the insertion groove, the insertion part has a guide block, and the insertion groove has a guide groove that cooperates with the guide block.

[0012] Optionally, the locking mechanism includes a locking bolt that passes through the lock and is threadedly connected to it, and the locking bolt restricts the rotation of the lock by abutting against an adjusting member.

[0013] Optionally, the locking mechanism includes a locking pin, a reset member connecting the locking pin and the lock, the reset member applying a force to the locking pin towards the adjusting member, and when no external force is applied, the reset member drives the locking pin to abut against the adjusting member, thereby restricting the rotation of the lock.

[0014] Optionally, the lock is a ring-shaped structure, with several protrusions evenly distributed along the circumferential direction on the outer wall of the lock.

[0015] Optionally, the second connecting portion includes a slot, the slot including 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] Optionally, the fastener includes a rod, and the first connecting part is a connecting ring integrally formed with the rod.

[0017] Optionally, the adjusting member includes a sleeve and a connecting arm integrally formed at one end of the sleeve, and the second connecting portion is integrally formed on the connecting arm.

[0018] 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

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the hidden adjustment component in Embodiment 1 of this application;

[0021] Figure 3 This is a structural diagram of the fastener in Embodiment 1 of this application;

[0022] Figure 4 This is a structural diagram of the adjusting component in Embodiment 1 of this application;

[0023] Figure 5 This is a structural diagram of the lock component according to Embodiment 1 of this application;

[0024] Figure 6 yes Figure 1 Top view;

[0025] Figure 7 It is along Figure 6 Schematic diagram of the cross-sectional structure along line AA;

[0026] Figure 8 This is a partial cross-sectional view of Embodiment 2 of this application;

[0027] Figure 9 This is a partial cross-sectional view of Embodiment 3 of this application.

[0028] Reference numerals: 1. Fixing component; 2. Adjusting component; 3. First connecting part; 4. Second connecting part; 5. Rod body; 6. Connecting ring; 7. Sleeve; 8. Connecting arm; 9. Insertion groove; 10. Guide block; 11. Guide groove; 12. First groove body; 13. Second groove body; 14. Locking groove; 15. Locking component; 16. Locking tooth; 17. Movable groove; 18. Protrusion; 19. Locking bolt; 20. Spring; 21. Locking pin; 22. Limiting part. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0030] Example 1: This application discloses a rotation control backrest adjustment mechanism, including a fixing member 1 and an adjusting member 2. One end of the fixing member 1 has a first connecting portion 3 for connecting a chair rod to the seat; one end of the adjusting member 2 has a second connecting portion 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 portion 3 and the second connecting portion 4.

[0031] Specifically, the fastener 1 includes a rod 5 and a first connecting part 3, which is a connecting ring 6 integrally formed with the rod 5. The connecting ring 6 has a racetrack-shaped structure. During installation, the connecting ring 6 is fitted onto the seat rod and locked with a pin.

[0032] The adjusting component 2 includes a sleeve 7 and a connecting arm 8 integrally formed at one end of the sleeve 7, with a second connecting part 4 integrally formed on the connecting arm 8. The inner cavity of the sleeve 7 is an insertion groove 9, and the rod 5 serves as the insertion part, inserted into the inner cavity of the sleeve 7. To prevent the sleeve 7 from rotating during movement, two guide blocks 10 are symmetrically formed on the insertion part. The insertion groove 9 has a guide groove 11 that mates with the guide blocks 10; that is, a guide groove 11 is formed on the inner wall of the sleeve 7. The second connecting part 4 includes a slot with openings at the top and on the side closest to the user, and a closed bottom. The slot includes a first groove 12 and a second groove 13, the first groove 12 being larger than the second groove 13, and the second groove 13 located outside the first groove 12. During installation, the protrusions on the backrest corresponding to the slots are inserted into the slots.

[0033] The fixing member 1 has several locking grooves 14 along the moving direction of the adjusting member 2; a locking member 15 is rotatably connected to the adjusting member 2, and the locking member 15 has locking teeth 16 that slide into the locking grooves 14; the adjusting member 2 has a movable groove 17 for the locking teeth 16 to move, and the locking teeth 16 have two states when rotating with the locking member 15: sliding into the locking grooves 14 and completely disengaging from the locking grooves 14. When the locking teeth 16 slide into the locking grooves 14, the locking member 15 restricts the rotation of the locking member 15 by friction or a locking mechanism.

[0034] The locking groove 14 is formed on the rod 5 and multiple grooves are arranged along the axial direction of the rod 5. The cross-section of the locking groove 14 is similar to an isosceles trapezoid. The locking groove 14 extends along the circumference of the rod 5 and the extension angle is generally 30-40 degrees. The locking member 15 is a ring structure. To facilitate the rotation of the locking member 15, several protrusions 18 are evenly distributed along the circumference on the outer wall of the locking member 15. The locking teeth 16 are integrally formed on the inner wall of the ring structure. In order to ensure reliable connection between the locking teeth 16 and the locking groove 14, multiple locking teeth 16 are arranged. The locking teeth 16 are located in the movable groove 17. When the locking teeth 16 are disengaged from the locking groove 14, the locking teeth 16 are spaced apart from the outer wall of the rod 5.

[0035] In this embodiment, the locking member 15 is restricted from rotating without external force through friction. This can be understood as the inner wall of the annular structure of the locking member 15 being interference-fitted with the outer wall of the sleeve 7.

[0036] The implementation principle of the rotation control back-tracking adjustment mechanism in this application embodiment is as follows: When the locking member 15 rotates until the locking tooth 16 slides into the locking groove 14, the fixing member 1 and the adjusting member 2 are axially locked. At this time, the adjusting member 2 cannot move relative to the fixing member 1. During adjustment, a certain force is needed to overcome the friction caused by the interference fit. Rotating the locking member 15 causes the locking tooth 16 to separate from the locking groove 14. At this time, since the locking tooth 16 is spaced apart from the outer wall of the rod body 5, the adjusting member 2 can be moved.

[0037] Example 2: Unlike Example 1, in this example, the locking member 15 is restricted from rotating without external force through a locking mechanism. This can be understood as the inner wall of the annular structure of the locking member 15 being clearance-fitted with the outer wall of the sleeve 7. The locking mechanism includes a locking bolt 19, which passes through the locking member 15 and is threadedly connected to it. The locking bolt 19 restricts the rotation of the locking member 15 by abutting against the adjusting member 2.

[0038] Example 3: Unlike Example 2, the locking mechanism includes a locking pin 21 and a reset member connecting the locking pin 21 and the locking member 15. The reset member applies a force to the locking pin 21 towards the adjusting member 2, and when no external force is applied, the reset member drives the locking pin 21 to abut against the adjusting member 2, thereby restricting the rotation of the locking member 15. The locking pin 21 has an integrally formed limiting part 22, which is a cylindrical structure. The reset member is a spring 20, which is a tension spring. One end of the spring 20 is fixed to the limiting part 22, and the other end is fixed to the outer wall of the locking member 15. The spring 20 can be fixed by adhesive or welding.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0041] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotation control and back-tracking adjustment mechanism, characterized in that: Includes a fastener (1), and 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 several locking grooves (14) along the moving direction of the adjusting member (2); a locking member (15) is rotatably connected to the adjusting member (2), and the locking member (15) has locking teeth (16) that slide into the locking grooves (14); the adjusting member (2) has a movable groove (17) for the locking teeth (16) to move, and the locking teeth (16) have two states when rotating with the locking member (15): sliding into the locking groove (14) and completely disengaging from the locking groove (14). When the locking teeth (16) slide into the locking groove (14), the locking member (15) restricts the rotation of the locking member (15) by friction or locking mechanism.

2. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: Multiple locking teeth (16) are arranged in a row.

3. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The fixing member (1) has an insertion part, the adjusting member (2) has an insertion groove (9), the insertion part is located in the insertion groove (9), the insertion part has a guide block (10), and the insertion groove (9) has a guide groove (11) that cooperates with the guide block (10).

4. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The locking mechanism includes a locking bolt (19), which passes through the lock (15) and is threadedly connected to the lock (15). The locking bolt (19) restricts the rotation of the lock (15) by abutting the adjusting member (2).

5. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The locking mechanism includes a locking pin (21) and a reset member connecting the locking pin (21) and the lock (15). The reset member applies a force to the locking pin (21) to the adjusting member (2), and when there is no external force, the reset member drives the locking pin (21) to abut against the adjusting member (2), thereby restricting the rotation of the lock (15).

6. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The locking element (15) has a ring-shaped structure, and several protrusions (18) are evenly distributed along the circumferential direction on the outer wall of the locking element (15).

7. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The second connecting part (4) includes a slot, which includes a first slot (12) and a second slot (13). The first slot (12) is larger than the second slot (13), and the second slot (13) is located outside the first slot (12).

8. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The fastener (1) includes a rod (5), and the first connecting part (3) is a connecting ring (6) integrally formed with the rod (5).

9. The rotation control and back-tracking adjustment mechanism according to claim 1, characterized in that: The adjusting member (2) includes a sleeve (7) and a connecting arm (8) integrally formed on one end of the sleeve (7), and the second connecting part (4) is integrally formed on the connecting arm (8).

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