A chair back adjustment armrest structure

Abstract

A chair back adjustment armrest structure includes a seat cushion, a chair back, and armrests connected to both sides of the seat cushion and the chair back; the armrest includes a connecting frame and a connecting armrest, the connecting frame is connected to the seat cushion, the rear end of the connecting armrest is connected to the chair back, and the rod body is connected to the connecting frame; the connecting armrest has an adjustment connection action of moving forward and backward relative to the connecting frame, driving the chair back to tilt. The chair back adjustment armrest structure of the present invention is adjusted by the armrest composed of the connecting frame and the connecting armrest, wherein the connecting teeth and movable transverse grooves in the connecting armrest enable the chair back to adjust the tilt angle and can be adjusted to a lying state; and the main frame of the connecting frame can be deformed to adapt to the tilt and lying state of the chair back, so that the chair back can play a buffering role, and the flatness is better when lying, thereby improving the comfort of the chair; in addition, the main frame can disperse the force transmitted from the chair back to the connecting frame, so that a simple structure can bear a large weight and improve the service life of the chair.

Description

Technical Field

[0001] The invention relates to the field of chairs, and more particularly to a chair back adjusting armrest structure. Background Art

[0002] Chairs are one of the most popular seats and are widely used in offices. Most of the chairs in the prior art adopt a structure in which the seat cushion, the backrest and the armrests are fixedly connected. The angle between the seat cushion and the backrest is fixed. When the user needs to lie down for a short time after working for a period of time, especially during lunch break, the backrest cannot be adjusted. In order to meet people's needs, chairs with adjustable backrest angles have gradually appeared, and even the backrest can be adjusted to a lying state. However, the existing chair adjustment structure is complicated, and the comfort of sitting is poor after the backrest angle is adjusted, especially when adjusted to a lying state, the flatness between the backrest and the seat cushion is poor, and the overall comfort is insufficient. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a chair back adjustment armrest structure. The chair back adjustment armrest structure of the present invention is adjusted by an armrest consisting of a connecting frame and a connecting armrest, wherein the connecting teeth and the movable transverse grooves in the connecting armrest enable the chair back to be adjusted to an inclination angle and to a lying state; and the main frame of the connecting frame can be deformed to adapt to the inclination and lying state of the chair back, so that the chair back can play a buffering role and has better flatness when lying down, thereby improving the comfort of the chair; in addition, the main frame can disperse the force transmitted to the chair back from the chair back to the connecting frame, so as to bear a larger weight with a simple structure, thereby improving the service life of the chair.

[0004] The specific technical solution of the present invention is as follows: a chair back adjustment armrest structure, comprising a seat cushion, a chair back and armrests connected to the seat cushion and both sides of the chair back; the armrest comprises a connecting frame and a connecting arm, the connecting frame is connected to the seat cushion, the rear end of the connecting arm is connected to the chair back and the rod body is connected to the connecting frame; the connecting arm has an adjustable connection action of moving forward and backward relative to the connecting frame, driving the chair back to tilt.

[0005] Thus, by adjusting the armrest, the inclination angle of the chair back can be easily and quickly adjusted, and the chair back can even be placed in a reclining state.

[0006] As a preferred embodiment of the present invention, the connecting frame includes a main frame body formed in a ring shape and a clamping rod extending upward from the front side of the main frame body, and a clamping protrusion clamped with the connecting support rod is provided above the clamping rod.

[0007] Thus, the main frame is a hollow ring and can be deformed appropriately. The force of the chair back tilting and flipping backward is borne by the clamping rod and then distributed to the entire main frame, which can disperse the force and play a buffering role.

[0008] As a preferred embodiment of the present invention, a first connecting hole and a second connecting hole connected to the seat cushion are provided at the bottom of the main frame, and a third connecting hole connected to the chair back is provided at the rear, and the chair back and the main frame are hinged at the third connecting hole.

[0009] Thus, the connecting frame is fixedly connected to the seat cushion via the first connecting hole and the second connecting hole, and the seat back can rotate with the third connecting hole as a fulcrum, thereby adjusting the inclination angle of the seat back.

[0010] As a preferred embodiment of the present invention, a hollow connection groove is provided below the connection support rod, and a connection latch tooth with an opening facing downward and rearward is provided on at least one side of the connection groove.

[0011] Thus, the latching protrusion is engaged with the connecting latching teeth to achieve limiting, so that the chair back is in a fixed state.

[0012] As a preferred embodiment of the present invention, the connecting latches are provided at least at two locations along the extending direction of the connecting support rod.

[0013] Thus, the locking protrusion is locked into different connecting teeth to adjust the tilt angle of the seat back.

[0014] As a preferred embodiment of the present invention, a movable transverse groove is opened on the side of the connecting groove below the connecting teeth, and the movable transverse groove connects all the openings below the connecting teeth and extends to the front side of the connecting teeth close to the front end of the connecting support rod.

[0015] Therefore, the latch protrusion disengages from the connecting latch tooth and enters the movable transverse groove, and the latch protrusion can be quickly adjusted to engage with the connecting latch tooth at different positions to achieve rapid adjustment of the chair back, or the latch protrusion can be adjusted to the front end of the movable transverse groove to make the chair back nearly horizontal and adjusted to a reclining state.

[0016] As a preferred embodiment of the present invention, the diameter of the latching protrusion is smaller than the minimum width of the connecting latch tooth opening and the minimum width of the movable transverse groove.

[0017] Therefore, the cam will not interfere during the adjustment process, ensuring smooth and efficient adjustment.

[0018] As a preferred embodiment of the present invention, the main frame includes an outer frame and an inner frame, the first connection hole is opened in the outer frame, and the second connection hole and the third connection hole are opened in the inner frame.

[0019] Therefore, during the deformation of the main frame, a certain displacement can be generated between the outer frame and the inner frame, which can increase the elastic deformation of the main frame and make the force on the main frame more dispersed, so that the cushioning effect of the chair back is better; especially when the chair back is adjusted to a reclining state, the chair back is subjected to greater force after a person lies down, and under the action of the outer frame and the inner frame, the main frame can be fully deformed, so that the third connecting hole moves down to a height close to the second connecting hole, so that the chair back is nearly flat with the upper surface of the seat cushion after leveling, making the human body more comfortable after lying down.

[0020] In summary, the present invention has the following beneficial effects:

[0021] The chair back adjustment armrest structure of the present invention is adjusted by an armrest consisting of a connecting frame and a connecting armrest, wherein the connecting teeth and the movable transverse grooves in the connecting armrest enable the chair back to be adjusted to an inclination angle and to a lying state; and the main frame body of the connecting frame can be deformed to adapt to the inclination and lying state of the chair back, so that the chair back can play a buffering role and has better flatness when lying down, thereby improving the comfort of the chair; in addition, the main frame body can disperse the force transmitted from the chair back to the connecting frame, so as to bear a larger weight with a simple structure and improve the service life of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of the chair back adjustable armrest structure of the present invention;

[0023] Figure 2 It is a front view of the chair back adjustable armrest structure of the present invention;

[0024] In the figure, 1-seat cushion, 2-backrest, 3-armrest, 31-connecting frame, 311-main frame, 3111-first connecting hole, 3112-second connecting hole, 3113-third connecting hole, 311a-outer frame, 311b-inner frame, 312-connecting rod, 3121-clamping protrusion, 32-connecting armrest, 321-connecting groove, 3211-connecting tooth, 3212-movable horizontal groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2A chair back adjustable armrest structure includes a seat cushion 1, a seat back 2 and armrests 3 connected to both sides of the seat cushion 1 and the seat back 2; the armrest 3 includes a connecting frame 31 and a connecting armrest 32, the connecting frame 31 is connected to the seat cushion 1, the rear end of the connecting armrest 32 is connected to the seat back 2 and the rod body is connected to the connecting frame 31; the connecting armrest 32 has an adjustable connection action of moving forward and backward relative to the connecting frame 31, driving the chair back 2 to tilt.

[0027] Thus, by adjusting the armrest 3, the inclination angle of the chair back 2 can be easily and quickly adjusted, and the chair back 2 can even be placed in a reclining state.

[0028] like Figure 1 , Figure 2 The connecting frame 31 includes a main frame body 311 formed in a ring shape and a clamping rod 312 extending upward from the front side of the main frame body 311 , and a clamping protrusion 3121 clamped with the connecting support rod 32 is provided above the clamping rod 312 .

[0029] Therefore, the main frame 311 is a hollow ring and can be deformed appropriately. The force of the chair back 2 tilting and flipping backward is borne by the clamping rod 312 and then distributed to the entire main frame 311, which can disperse the force and play a buffering role.

[0030] like Figure 1 , Figure 2 A first connection hole 3111 and a second connection hole 3112 connected to the seat cushion 1 are provided at the bottom of the main frame 311 , and a third connection hole 3113 connected to the chair back 2 is provided at the rear. The chair back 2 and the main frame 311 are hinged at the third connection hole 3113 .

[0031] Thus, the connecting frame 31 is fixedly connected to the seat cushion 1 through the first connecting hole 3111 and the second connecting hole 3112 , and the seat back 2 can rotate with the third connecting hole 3113 as a fulcrum, so as to adjust the tilt angle of the seat back 2 .

[0032] like Figure 1 , Figure 2 A hollow connection groove 321 is provided below the connection lever 32 , and a connection latch 3211 with an opening facing downward and rearward is provided on at least one side of the connection groove 321 .

[0033] Thus, the latching protrusion 3121 is latched into the connecting latching tooth 3211 to achieve position limiting, so that the chair back 2 is in a fixed state.

[0034] like Figure 1 , Figure 2 The connecting teeth 3211 are provided at least at two locations along the extending direction of the connecting support rod 32 .

[0035] Therefore, the locking protrusion 3121 is locked into different connecting teeth 3211 to adjust the tilt angle of the chair back 2.

[0036] like Figure 1 , Figure 2 A movable transverse groove 3212 is provided on the side of the connection groove 321 below the connection latch teeth 3211 . The movable transverse groove 3212 connects the openings below all the connection latch teeth 3211 and extends to the front side of the connection latch teeth 3211 close to the front end of the connection lever 32 .

[0037] Therefore, the latch 3121 disengages from the connecting tooth 3211 and enters the movable transverse groove 3212, and the latch 3121 can be quickly adjusted to engage with the connecting tooth 3211 at different positions to achieve rapid adjustment of the chair back 2, or the latch 3121 can be adjusted to the front end of the movable transverse groove 3212 to make the chair back 2 nearly horizontal and adjusted to a reclining state.

[0038] like Figure 1 , Figure 2 The diameter of the protrusion 3121 is smaller than the minimum width of the opening of the connecting tooth 3211 and the minimum width of the movable transverse groove 3212 .

[0039] As a result, the latching protrusion 3121 will not interfere during the adjustment process, thereby ensuring smooth and efficient adjustment.

[0040] like Figure 1 , Figure 2 The main frame 311 includes an outer frame 311a and an inner frame 311b, the first connection hole 3111 is opened in the outer frame 311a, and the second connection hole 3112 and the third connection hole 3113 are opened in the inner frame 311b.

[0041] Therefore, during the deformation of the main frame 311, a certain displacement can be generated between the outer frame 311a and the inner frame 311b, which can increase the elastic deformation of the main frame 311 and make the force on the main frame 311 more dispersed, so that the cushioning effect of the chair back 2 is better; especially when the chair back 2 is adjusted to a reclining state, the chair back 2 is subjected to a greater force after the person lies down, and the main frame 311 can be fully deformed under the action of the outer frame 311a and the inner frame 311b, so that the third connecting hole 3113 moves down to a height close to the second connecting hole 3112, so that the chair back 2 is almost flat with the upper surface of the seat cushion 1 after leveling, making the human body more comfortable after lying down.

[0042] The above-described embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A chair back adjustable armrest structure, characterized in that: The invention comprises a seat cushion (1), a chair back (2), and an armrest (3) connected to both sides of the seat cushion (1) and the chair back (2); the armrest (3) comprises a connecting frame (31) and a connecting armrest (32); the connecting frame (31) is connected to the seat cushion (1); the rear end of the connecting armrest (32) is connected to the chair back (2) and the rod body is connected to the connecting frame (31); the connecting armrest (32) has an adjustable connection action of moving forward and backward relative to the connecting frame (31), thereby driving the chair back (2) to tilt; The connecting frame (31) comprises a main frame body (311) in a ring shape and a clamping rod (312) extending upward from the front side of the main frame body (311); a clamping protrusion (3121) clamped with the connecting support rod (32) is provided above the clamping rod (312); A first connection hole (3111) and a second connection hole (3112) connected to the seat cushion (1) are provided below the main frame (311), and a third connection hole (3113) connected to the chair back (2) is provided at the rear; the chair back (2) and the main frame (311) are hingedly connected at the third connection hole (3113); The main frame (311) comprises an outer frame (311a) and an inner frame (311b), the first connection hole (3111) is opened in the outer frame (311a), and the second connection hole (3112) and the third connection hole (3113) are opened in the inner frame (311b).

2. The chair back adjustable armrest structure according to claim 1, characterized in that: A hollow connection groove (321) is provided below the connection support rod (32), and at least one side of the connection groove (321) is provided with a connection latch tooth (3211) with an opening facing downward and rearward.

3. The chair back adjustable armrest structure according to claim 2, characterized in that: The connecting latch teeth (3211) are provided at least at two locations along the extending direction of the connecting support rod (32).

4. The chair back adjustable armrest structure according to claim 2, characterized in that: A movable transverse groove (3212) is provided on the side of the connection groove (321) below the connection latch teeth (3211); the movable transverse groove (3212) connects all the openings below the connection latch teeth (3211) and extends to the front side of the connection latch teeth (3211) close to the front end of the connection support rod (32).

5. The chair back adjustable armrest structure according to claim 4, characterized in that: The diameter of the latching protrusion (3121) is smaller than the minimum width of the opening of the connecting latch tooth (3211) and the minimum width of the movable transverse groove (3212).

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