Toggle type back-and-forth adjusting mechanism for chair back

Abstract

The utility model discloses a shifting type chair back front-back adjusting mechanism which comprises a chair support, a fixing part is connected to the chair support, a telescopic part is arranged on the fixing part in a sleeved mode, chair back connecting seats are connected to the two sides of the telescopic part and used for being connected with a chair back, a connecting column is fixed to the upper end of the fixing part, and the connecting column is connected with the telescopic part in a sleeved mode. The connecting column is rotatably connected with a shifting button, a positioning buckle is formed at the upper end of the telescopic part, a cavity is formed in the bottom of the shifting button, a plurality of positioning grooves are formed in one side wall of the shifting button, a sliding groove is formed in the other side wall of the shifting button, the positioning buckle is inserted into the different positioning grooves, and the sliding groove is matched with the cavity. According to the utility model, through swinging of the toggle button, the positioning buckle is inserted into the positioning groove, the telescopic position of the telescopic part is fixed, the front-back position of the telescopic part is adjusted, and the front-back position of the chair back is further adjusted, so that the chair back can be attached to the back, and the use comfort of the chair is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a toggle-type backrest front-back adjustment mechanism. Background Art

[0002] Existing children's sitting posture correction chairs are generally designed with the starting point of adjustable seat height, and the seat height can be manually adjusted according to the height of children, so that children can maintain a correct sitting posture. However, when children are doing homework at a desk, the backrest of the existing seats cannot fit against the back to support the back. Prolonged sitting at a desk like this will cause lumbar fatigue, which is further likely to lead to lumbar spine deformation and also form bad habits such as hunchback. Moreover, the existing backrest adjustment mechanisms are too complex and the production cost is high. Therefore, a toggle-type backrest front-back adjustment mechanism is designed to simplify the structure and make the adjustment more convenient. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a toggle-type backrest front-back adjustment mechanism. By forming a positioning groove on the toggle button of the fixed part and a positioning buckle on the telescopic part, and using the swing of the toggle button, the positioning buckle is inserted into the positioning groove to fix the telescopic position of the telescopic part, thereby adjusting the front-back position of the telescopic part and further adjusting the front-back position of the backrest, so that the backrest can fit against the back and improve the use comfort of the seat.

[0004] The utility model provides the following technical solution: a toggle-type backrest front-back adjustment mechanism, including a seat bracket, a fixed part is connected to the seat bracket, a telescopic part is sleeved on the fixed part, backrest connection seats are connected to both sides of the telescopic part, and the backrest connection seats are used to connect the backrest. A connecting column is fixed at the upper end of the fixed part, a toggle button is rotatably connected to the connecting column, a positioning buckle is formed at the upper end of the telescopic part, a cavity is formed at the bottom of the toggle button, a plurality of positioning grooves are formed on one side wall of the toggle button, and a sliding groove is opened on the other side wall inside the toggle button. The positioning buckle is inserted into different positioning grooves to position the telescopic position of the telescopic part.

[0005] In order to rotatably connect the toggle button to the fixed part, the toggle button is integrally in a fan shape, a rotating column is formed at the center of the fan-shaped shell, a jack is opened at the center of the rotating column, the jack is sleeved on the connecting column, and the positioning groove is opened on one side wall inside the toggle button.

[0006] The distance between the sliding groove and the positioning groove is greater than the width of the positioning buckle, and the positioning buckle can only be inserted into the sliding groove or the positioning groove unilaterally.

[0007] In order to facilitate the swing of the toggle button, a dial is also formed on the surface of the toggle button, and the dial is on the same straight line as the radius of the rotating column.

[0008] In order to realize automatic reset of the telescopic part, a spring installation groove is formed on one end of the telescopic part, a spring fixing groove is formed on one end of the fixed part, and a spring is installed between the spring installation groove and the spring fixing groove.

[0009] In order to guide the sliding of the fixed part and the telescopic part, an inwardly recessed plugging groove is formed on the outer surface of the fixed part, and an plugging edge is formed on the inner wall of the telescopic part, and the plugging edge cooperates with the plugging groove.

[0010] In order to fine-tune the height of the chair back, a waist hole is opened on the seat bracket, a locking knob is connected to one side of the waist hole, the fixing part is connected to the other end of the locking knob, the fixing part and the locking knob are connected by a screw, and the fixing part is located on the other side of the waist hole.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0012] (1) By forming a positioning groove on the toggle button of the fixed part and a positioning buckle on the telescopic part, the positioning buckle is inserted into the positioning groove by swinging the toggle button to fix the telescopic position of the telescopic part, thereby adjusting the front and rear position of the telescopic part and further adjusting the front and rear position of the seat back so that the seat back can fit the back, thereby improving the comfort of the seat;

[0013] (2) By forming positioning grooves and sliding grooves on the inner walls on both sides of the toggle button, the swing angle of the toggle button is limited. At the same time, the toggle button covers the positioning buckle, thereby improving the aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the installation structure of the fixed part and the telescopic part of the utility model;

[0017] Figure 3 It is an exploded view of the installation structure of the fixed part and the telescopic part of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the toggle button of the utility model;

[0019] Figure 5 It is a three-dimensional diagram of the internal structure of the toggle button of the utility model;

[0020] Figure 6 It is a perspective view of the internal structure of another perspective of the toggle button of the present utility model;

[0021] Figure 7 It is the internal structure diagram of the telescopic part of the present utility model;

[0022] Figure 8 It is the internal structure diagram of the fixing part of the present utility model;

[0023] In the figure: 1. Fixing part; 11. Connecting column; 12. Insertion slot; 13. Spring fixing slot; 2. Telescopic part; 21. Backrest connecting seat; 22. Insertion edge; 23. Spring installation slot; 3. Toggle button; 31. Dial; 32. Jack; 33. Rotating column; 34. Sliding slot; 35. Positioning slot; 4. Positioning buckle; 5. Seat bracket; 51. Waist hole; 6. Locking knob; 7. Backrest. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figures 1 to 3The utility model provides a technical solution: a toggle-type chair back front and back adjustment mechanism, including a seat bracket 5, a fixed part 1 is connected to the seat bracket 5, a telescopic part 2 is sleeved on the fixed part 1, the fixed part 1 and the telescopic part 2 are sleeves that are sleeved with each other, the telescopic part 2 moves forward and backward along the fixed part 1, and a chair back connecting seat 21 is connected to both sides of the telescopic part 2. The chair back connecting seat 21 is used to connect the chair back 7, and the front and rear position of the chair back 7 is adjusted by moving the telescopic part 2 forward and backward. A connecting column 11 is fixed to the upper end of the fixed part 1, and a toggle button 3 is rotatably connected to the connecting column 11. A positioning buckle 4 is formed at the upper end of the telescopic part 2, a cavity is formed at the bottom of the toggle button 3, and a plurality of positioning grooves 3 are opened on one side wall of the toggle button 3. 5. The positioning buckle 4 is inserted into different positioning grooves 35 to position the telescopic position of the telescopic part 2. A sliding groove 34 is provided on the other side wall of the toggle button 3. When the positioning buckle 4 is located in the sliding groove 34, the telescopic part 2 can slide arbitrarily along the fixed part 1 to adjust the position of the telescopic part 2 on the fixed part 1. The sliding groove 34 limits the swing angle of the toggle button 3. By rotating the toggle button 3, when the positioning buckle 4 is inserted into the positioning groove 35, the toggle button 3 fixes the position of the positioning buckle 4, further fixes the telescopic position of the telescopic part 2, and locks the position of the chair back 7, thereby adjusting the front and rear position of the chair back 7, so that the chair back 7 can fit the user's back, support the back, and improve comfort.

[0027] like Figures 4 to 6 The toggle button 3 is fan-shaped as a whole, and a rotating column 33 is formed at the center of the fan-shaped shell. A socket 32 ​​is provided at the center of the rotating column 33. The socket 32 ​​is sleeved on the connecting column 11, so that the toggle button 3 swings around the connecting column 11. A plurality of positioning grooves 35 are provided on a side wall inside the toggle button 3. By swinging the toggle button 3, the positioning buckle 4 can be embedded in the positioning groove 35 to fix the telescopic position of the telescopic part 2. At the same time, the toggle button 3 in the form of a fan-shaped shell can limit the swing angle.

[0028] The distance between the sliding groove 34 and the positioning groove 35 is greater than the width of the positioning buckle 4 , and the positioning buckle 4 can only be embedded in the sliding groove 34 or the positioning groove 35 on one side to achieve sliding guidance or position locking of the telescopic part 2 .

[0029] like Figure 4 As shown, a paddle 31 is formed on the surface of the toggle button 3, and the paddle 31 is on the same straight line as the radius of the rotating column 33. By manually toggling the paddle 31, the toggle button 3 is swung left and right, and the positioning buckle 4 is further inserted into the sliding groove 34 or the positioning groove 35, which is convenient for the telescopic part 2 to move forward and backward or fix the position of the telescopic part 2, thereby adjusting the position of the telescopic part 2, and further adjusting the front and rear position of the chair back 7, so that the chair back 7 can support the user's back and improve comfort.

[0030] likeFigure 7 and 8 As shown in 8 , a spring installation groove 23 is formed at one end inside the telescopic part 2, and a spring fixing groove 13 is formed at one end inside the fixing part 1. A spring is installed between the spring installation groove 23 and the spring fixing groove 13. By setting the spring, the sliding of the telescopic part 2 and the fixing part 1 can squeeze the spring, causing the spring to generate elastic force. Under the action of the elastic force, the unfixed telescopic part 2 can automatically reset.

[0031] An inwardly recessed insertion groove 12 is formed on the outer surface of the fixing part 1, and an insertion rib 22 is formed on the inner wall of the telescopic part 2. The insertion rib 22 cooperates with the insertion groove 12. By using the guiding of the insertion groove 12 for the insertion rib 22, the sliding of the fixing part 1 and the telescopic part 2 is smooth and there will be no jamming phenomenon.

[0032] A waist-shaped hole 51 is formed in the seat bracket 5. One side of the waist-shaped hole 51 is connected with a locking knob 6. The fixing part 1 is connected to the other end of the locking knob 6. The fixing part 1 and the locking knob 6 are connected by a screw rod. The screw rod and the locking knob 6 rotate together. The screw rod is threadedly connected to the fixing part 1. The fixing part 1 is located on the other side of the waist-shaped hole 51. By rotating the locking knob 6, the distance between the fixing part 1 and the locking knob 6 is reduced, and the seat bracket 5 is clamped between the fixing part 1 and the locking knob 6. And when it is not clamped, the screw rod moves up and down in the waist-shaped hole 51 to further position the height of the fixing part 1 to meet the needs of users of different heights.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A toggle-type seat back forward and backward adjustment mechanism, comprising a seat bracket, the seat bracket being connected to a fixing portion, characterized in that: The fixed part is sleeved with a telescopic part, and both sides of the telescopic part are connected with a chair back connecting seat, the chair back connecting seat is used to connect the chair back, a connecting column is fixed to the upper end of the fixed part, a toggle button is rotatably connected to the connecting column, a positioning buckle is formed at the upper end of the telescopic part, a cavity is formed at the bottom of the toggle button, a plurality of positioning grooves are formed on one side wall of the toggle button, a sliding groove is opened on the other side wall of the toggle button, the positioning buckles are inserted into different positioning grooves to position the telescopic position of the telescopic part.

2. The toggle type seat back front and rear adjustment mechanism according to claim 1, characterized in that: The toggle button is fan-shaped as a whole, a rotating column is formed at the center of the fan-shaped shell, a plug hole is opened at the center of the rotating column, the plug hole is sleeved on the connecting column, and the positioning groove is opened on a side wall inside the toggle button.

3. The toggle type seat back front and rear adjustment mechanism according to claim 1, characterized in that: The distance between the sliding groove and the positioning groove is greater than the width of the positioning buckle, and the positioning buckle can only be embedded in the sliding groove or the positioning groove on one side.

4. The toggle type seat back front and rear adjustment mechanism according to claim 2, characterized in that: A paddle is also formed on the surface of the toggle button, and the paddle is on the same straight line as the radius of the rotating column.

5. The toggle type seat back front and rear adjustment mechanism according to claim 1, characterized in that: A spring installation groove is formed on one end of the telescopic part, a spring fixing groove is formed on one end of the fixing part, and a spring is installed between the spring installation groove and the spring fixing groove.

6. The toggle type seat back front and rear adjustment mechanism according to claim 1, characterized in that: An inwardly recessed plugging groove is formed on the outer surface of the fixing portion, and an plugging edge is formed on the inner wall of the telescopic portion, and the plugging edge cooperates with the plugging groove.

7. The toggle-type seat back front and rear adjustment mechanism according to claim 1, characterized in that: The seat bracket is provided with a waist hole, one side of the waist hole is connected with a locking knob, the fixing part is connected to the other end of the locking knob, the fixing part and the locking knob are connected by a screw, and the fixing part is located on the other side of the waist hole.

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