Silent seat back supporting structure

Abstract

The invention relates to the technical field of seat noise reduction, and particularly discloses a silent seat back supporting structure which comprises a seat, a backrest, a first back supporting pipe assembly and a second back supporting pipe assembly, and each assembly is provided with a backrest, a back supporting pipe and a spring pre-tightening retaining piece. According to the device, through cooperation of the seat, the backrest, the first back supporting pipe assembly, the second back supporting pipe assembly and the spring pre-tightening retaining piece, when backward inclination force is applied to the backrest, the back supporting pipe assemblies are linked to apply backward force through an internal spring, so that the backrest is elastically attached to and supports a human body, and through a spring silencer, the back of the human body is effectively protected; the possibility of noise and part abrasion caused by friction of the tipping mechanism is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seat noise reduction, in particular to a silent seat back support structure. BACKGROUND

[0002] In daily life and work scenes, as an indispensable furniture, the performance of the back support structure of the seat is crucial. At present, the seat back support structures on the market are various in form, but there are some problems to be solved. When dealing with the action of leaning back by the human body, the traditional seat back support structure adopts a simple mechanical linkage mode. When the chair back is subjected to a backward tilting force, the components are directly rigidly connected or only realize motion transmission through simple friction fit. Although this design can provide certain support, it has obvious defects. On the one hand, due to the lack of effective elastic buffering mechanism, the backrest is difficult to realize natural and comfortable elastic fit with the human back, and cannot flexibly adjust the support force according to the different postures and stress conditions of the human body, which easily leads to fatigue and discomfort of the user's back after long time use. On the other hand, during the tilting process, the frequent relative motion between the components will generate a large friction force, which will further cause obvious noise. This noise not only affects the concentration and comfort of the user, but is particularly prominent in places such as offices and studies that require a quiet environment. At the same time, the continuous friction will also accelerate the wear of the components, shorten the service life of the seat, and increase the use cost.

[0003] Therefore, it is a technical problem to be solved in the seat industry to develop a new type of seat back support structure which can realize elastic fit support of the backrest with the human body while effectively reducing the noise and component wear during the tilting process, and it has important practical significance and market value. SUMMARY

[0004] In view of the above technical problems in the related art, the present application provides a silent seat back support structure which can solve the above problems.

[0005] To achieve the above technical purposes, the technical scheme of the present application is as follows: The application discloses a mute type seat back supporting structure which comprises a base plate, a seat, a back supporting pipe A, a back supporting pipe B and a seat back, back surface sides of the seat back are respectively fixedly provided with a back supporting pipe lining tube A and a back supporting pipe lining tube B, a top end of the back supporting pipe A is inlaid in the back supporting pipe lining tube A, and a top end of the back supporting pipe B is inlaid in the back supporting pipe lining tube B; spring silencers are attached to inner wall surfaces of the back supporting pipe A and the back supporting pipe B; a through hole D is formed in a top end of the spring silencer, a back mechanism spring buffer is inlaid and mounted in the through hole D, the back mechanism spring buffer is nested with a top end of a high-elasticity return mechanism spring, the high-elasticity return mechanism spring is in surface contact with the spring silencer, back slide block mechanism bushings are installed in the back supporting pipe A and the back supporting pipe B, the back slide block mechanism bushings comprise a back slide block mechanism bushing A and a back slide block mechanism bushing B which are connected with each other, top ends of the back slide block mechanism bushing A and the back slide block mechanism bushing B are integrally formed with back slide block mechanism bushing top points, a bottom end of the high-elasticity return mechanism spring is nested with the back slide block mechanism bushing top points; backrest frame pivot fixed parts are fixedly installed on both sides of a top portion of the base plate, the backrest frame pivot fixed parts are sleeved in the back slide block mechanism bushings; spring pre-tightening retainers are fixedly installed on both sides of the top portion of the base plate through screws, a clamping groove is formed in one side of the spring pre-tightening retainer, a spring pre-tightening retainer buffer is clamped and installed in the clamping groove, and pipe orifice fulcrums are integrally formed on outer walls of pipe orifices of bottom ends of the back supporting pipe A and the back supporting pipe B and are overlapped on surfaces of the spring pre-tightening retainer buffers.

[0006] Further, the spring silencer comprises an arc-shaped attaching piece and a ring with the through hole D, the back mechanism spring buffer is a mushroom-shaped column body, a protrusion is vertically and integrally formed on a surface of a column body part of the mushroom-shaped column body, and the back mechanism spring buffer is in interference inlaying cooperation with the ring of the spring silencer.

[0007] Further, a through hole C for accommodating a screw is formed in a middle portion of the spring pre-tightening retainer, a lock nut is threadedly installed on an end of the screw penetrating through the through hole C, a round bar A and a round bar B are integrally formed on both sides of the spring pre-tightening retainer, a protruding table is integrally formed on both sides of a top surface of the base plate, the protruding table is provided with a through hole A and a through hole B, the round bar A is inlaid in the through hole A, and the round bar B is inlaid in the through hole B.

[0008] Further, the spring pre-tightening retainer buffer comprises a flat panel and a buckle fixed to a back surface of the flat panel, the buckle is clamped with the clamping groove, and the pipe orifice fulcrum is overlapped on a front surface of the flat panel.

[0009] Further, a fixed table is integrally formed on the top surface of the base plate, and an end bottom of the backrest frame pivot fixed part is fixedly connected with the fixed table through welding.

[0010] Further, the back support tube liner A and the back support tube liner B are respectively provided with holes A and holes B for positioning screws.

[0011] The application has the following advantages: the device cooperates the seat, the backrest, the first back support tube assembly, the second back support tube assembly and the spring pre-tightening holder, when the backrest is applied with a backward tilting force, the linkage back support tube assembly applies a backward force through the internal spring, so that the backrest is elastically attached to the human body and supported, and the spring silencer is used to reduce the noise and the possibility of component wear caused by the friction of the tilting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0013] The present application will be further described in detail below according to the drawings.

[0014] Figure 1 is the front view of the mute type seat back support structure; Figure 2 is the rear view of the mute type seat back support structure; Figure 3 is the structural schematic view of the spring pre-tightening holder; Figure 4 is the exploded view of the spring pre-tightening holder; Figure 5 is the cooperation view of the spring pre-tightening holder and the pipe orifice fulcrum; Figure 6 is the exploded view of the back support tube, the spring silencer, the spring and the rear sliding block mechanism liner; Figure 7 is the side sectional view of the mute type seat back support structure.

[0015] In the drawings: 4. Positioning screw; 5. Backrest mechanism spring damper; 6. Base plate; 7. Spring muffler; 8. Seat; 9. High-elasticity return mechanism spring; 10A. Backrest support tube A; 10B. Backrest support tube B; 12. Chair back; 21. Spring preload retaining damper; 22A. Backrest support tube liner A; 22B. Backrest support tube liner B; 25. Tube opening; 26. Tube opening fulcrum; 32A. Hole A; 32B. Hole B; 33. Damper protrusion; 36. 37. Rear slider mechanism bushing apex; 38. Protrusion; 49. Through hole D; 40. Round bar A; 41. Round bar B; 42. Snap fastener; 43. Snap groove; 44. Through hole C; 55. Through hole A; 56. Through hole B; 57. Screw; 58. Rear slider mechanism bushing A; 69. Rear slider mechanism bushing B; 60. Backrest frame pivot fixing component; 61. Locking nut; 62. Spring preload retainer; 63. Fixing platform; 64. Bushing space; 85. Support tube space. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0017] like Figures 1-7 As shown, a silent seat back support structure is disclosed according to the present invention, including a base plate 6, a seat 8, a back support tube A10A, a back support tube B10B, and a seat back 12. Back support tube bushings A22A and B22B are respectively fixedly installed on both sides of the back of the seat back 12. The top end of the back support tube A10A is embedded inside the back support tube bushing A22A, and the top end of the back support tube B10B is embedded inside the back support tube bushing B22B. The back support tube bushings A22A and B22B are respectively provided with holes A32A and B32B for passing through positioning screws 4. Spring mufflers 7 are fitted to the inner walls of both back support tubes A10A and B10B. A through hole D38 is opened at the top of the spring muffler 7. A back mechanism spring buffer 5 is embedded in the through hole D38. The back mechanism spring buffer 5 is nested with the top of the high elasticity return mechanism spring 9. The high elasticity return mechanism spring 9 is in close contact with the surface of the spring muffler 7. A rear slider mechanism bushing is fitted inside both back support tubes A10A and B10B. The rear slider mechanism bushing includes a rear slider mechanism bushing A56 and a rear slider mechanism bushing B58 that are interlocked. The top of the rear slider mechanism bushing A56 and the top of the rear slider mechanism bushing B58 are integrally formed with a rear slider mechanism bushing apex 36. The bottom of the high elasticity return mechanism spring 9 is nested with the rear slider mechanism bushing apex 36. The backrest frame pivot fixing parts 60 are welded and fixedly installed on both sides of the top of the base plate 6. The backrest frame pivot fixing parts 60 are sleeved inside the bushing of the rear slider mechanism. Both sides of the top of the base plate 6 are fixedly installed with spring preload retainers 63 by screws 54. A slot 45 is opened on one side of the spring preload retainer 63, and a spring preload retaining buffer 21 is installed in the slot 45. The outer wall of the tube opening 25 at the bottom of the back support tube A10A and the bottom of the back support tube B10B is integrally formed with a tube opening support 26, which overlaps the surface of the spring preload retaining buffer 21.

[0018] Example 1: A silent seat back support structure for office chair seats and backrests; like Figure 1 , 2 The chair back 12 is connected to the back support tubes 10A and 10B. The chair back 12 is a one-piece shell. The upper parts of the back support tubes 10A and 10B are inserted into the back support tube bushings 22A and 22B respectively, and are fixed by screws passing through holes 32A and 32B. The chair seat 8 and the base plate 6 are connected to each other to form a component. The base plate 6 is connected to the bottom surface of the chair seat 8. The lower parts of the back support tubes 10A and 10B are connected to the base plate 6. When the user applies a tilting force to the chair back 12, the chair back 12, back support tubes 10A and 10B can bend backward, so that part of the lower part extends into the base plate 6.

[0019] As shown in Figure 3, the back support tube 10A and the back support tube 10B are formed by an internally hollow metal tube, the back support tube 10A and the back support tube 10B are both curved metal tubes internally wrapped with the back slider mechanism bushing 56 and the back slider mechanism bushing 58, the back slider mechanism bushing 56 and the back slider mechanism bushing 58 are fastened to form an internally hollow environment, and can wrap the backrest frame pivot fastener 60, the back support tube 10A, the back support tube 10B are fixed at the spring pre-tightening holder 63 at the end.

[0020] Reference Figure 4 , 5, the end of the backrest frame pivot fastener 60 is fixed by welding on the fixed platform 64, the backrest frame pivot fastener 60 is fastened in the internally hollow environment by the back slider mechanism bushing 56 and the back slider mechanism bushing 58, and the back support tube 10 internally nests the back slider mechanism bushing 56, the back slider mechanism bushing 58 and the backrest frame pivot fastener 60. The end of the back support tube 10 is provided with a pipe orifice support point 26, and the pipe orifice support point 26 is stopped on the spring pre-tightening holder buffer 21 in a static state, and the spring pre-tightening holder buffer 21 is fastened on the clamping groove 45 of the spring pre-tightening holder 63 through the buckle 44. The lower part of the spring pre-tightening holder 63 is provided with a round rod 43 and a round rod 41, the base plate 6 is provided with a through hole 52 and a through hole 50, the round rod 41 is correspondingly embedded in the through hole 50, the round rod 43 is correspondingly embedded in the through hole 52, and the screw 54 is locked with the locking nut 61 through the through hole 47, so that the spring pre-tightening holder 63 is firmly fixed on the base plate 6. The configuration of the back support tube 10A is the same as that of the back support tube 10B, and the description of the configuration of the back support tube 10A is also applicable to the back support tube 10B.

[0021] Reference Figure 6 , 7 The spring silencer 7 is made of plastic material, which includes a through hole 38, which is suitable for receiving the back mechanism spring buffer surface protrusion of the back mechanism spring buffer 5 and the buffer protrusion 33, and the upper part of the high-elasticity return mechanism spring 9 is supported through the back mechanism spring buffer surface, the top of the back mechanism spring buffer 5 is fixed at the lower part of the support tube space 86, and the lower part of the high-elasticity return mechanism spring 9 is supported through the back slider mechanism bushing top point 36, and the internal bushing space 67 of the back slider mechanism bushing 56 and the back slider mechanism bushing 58 is suitable for receiving the backrest frame pivot fastener 60.

[0022] After assembly, the occupant sits on the seat 8 upper surface, the back weight is distributed on the backrest 12, the backrest 12 supports the occupant's back with the back support pipe 10A and the back support pipe 10B, when the occupant applies weight to the backward reclining angle, the corresponding backrest 12 and the back support pipe 10A and the back support pipe 10B are inclined backward, and the maximum angle is 15°, the high-elasticity return mechanism spring 9 is pressed by gravity and is compressed downward, the high-elasticity return mechanism spring 9 touches and rubs the spring silencer 7 in the compression process, the spring silencer 7 is made of plastic material, which prevents the high-elasticity return mechanism spring 9 from directly contacting the inner wall of the back support pipe 10A and producing abnormal noise, and the back support pipe 10A and the back support pipe 10B slide to the end point of the rear slider mechanism bushing 56 and the rear slider mechanism bushing 58. When the occupant applies pressure weight to the forward inclination, the corresponding backrest 12, back support pipe 10A and back support pipe 10B follow the back forward inclination, the high-elasticity return mechanism spring 9 returns to the previous state, the pipe branch support point 26 returns to the previous static state position, the touching spring pre-tightening buffer 21 reduces the impact force of return, which helps to reduce noise.

[0023] In the preferred technical solution, the spring silencer 7 includes an arc-shaped fitting sheet and a circular ring with a through hole D38, the back mechanism spring buffer 5 is a mushroom-shaped column, the column part of the mushroom-shaped column is vertically integrated with a protrusion 37, the back mechanism spring buffer 5 is interference inlayed with the circular ring of the spring silencer 7, the back mechanism spring buffer 5 passes through the circular ring of the spring silencer 7, and the protrusion 37 is arranged to be interference inlayed with the circular ring, thereby improving the fastening of the spring buffer 5 and the spring silencer 7.

[0024] In the preferred technical solution, the spring pre-tightening holder 63 is provided with a through hole C47 for accommodating the screw 54, the end of the screw 54 penetrating the through hole C47 is provided with a locking nut 61, and the spring pre-tightening holder 63 is integrally provided with a round rod A41 and a round rod B43 on the two sides, respectively. The top surface of the base plate 6 is integrally provided with a protruding table on the two sides, the protruding table is provided with a through hole A50 and a through hole B52, the round rod A41 is inlayed in the through hole A50, and the round rod B43 is inlayed in the through hole B52. The round rod A41 and the round rod B43 are embedded in the through holes, cooperate with the screw 54 and the nut, and greatly improve the cooperation strength of the spring pre-tightening holder 63 and the protruding table of the base plate 6.

[0025] In the preferred technical solution, the spring pre-tightening buffer 21 includes a flat panel and a buckle 44 fixed to the back surface of the flat panel, the buckle 44 is clamped with the clamping groove 45, and the pipe branch support point 26 is overlapped on the front surface of the flat panel. The spring pre-tightening buffer 21 is designed with a large-area flat panel, which is convenient for overlapping with the pipe branch support point 26, is used for buffering impact, and reduces noise.

[0026] In the preferred technical scheme, the fixed table 64 is integrally formed on the top surface of the base plate 6, the end of the backrest frame pivot fixing part 60 is fixedly connected with the fixed table 64 through welding, and the surface of the fixed table 64 is provided with a curved surface which is attached to the end of the backrest frame pivot fixing part 60, so that the attached surface is increased and the welding fastening is enhanced.

[0027] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A silent type seat back support structure characterized by, It includes base plate (6), chair seat (8), back support pipe A (10A), back support pipe B (10B) and chair back (12), the chair back (12) back two sides are fixedly installed with back support pipe sleeve A (22A), back support pipe sleeve B (22B) respectively, the top end of back support pipe A (10A) is embedded in the inside of back support pipe sleeve A (22A), the top end of back support pipe B (10B) is embedded in the inside of back support pipe sleeve B (22B); The inner wall surface of back support pipe A (10A) and back support pipe B (10B) is fitted with spring silencer (7), the top of spring silencer (7) is provided with through hole D (38), back mechanism spring buffer (5) is embedded in the inside of through hole D (38), back mechanism spring buffer (5) is nested with high elastic return mechanism spring (9) top, high elastic return mechanism spring (9) is in surface contact with spring silencer (7), back support pipe A (10A) and back support pipe B (10B) are internally provided with rear slide block mechanism bushing, the rear slide block mechanism bushing includes rear slide block mechanism bushing A (56) and rear slide block mechanism bushing B (58) which are connected with each other, the top of rear slide block mechanism bushing A (56) and the top of rear slide block mechanism bushing B (58) are integrally formed with rear slide block mechanism bushing top point (36), the bottom of high elastic return mechanism spring (9) is nested with rear slide block mechanism bushing top point (36); The top of base plate (6) is fixedly provided with backrest frame pivot fixing part (60) on both sides, the backrest frame pivot fixing part (60) is internally provided with rear slide block mechanism bushing; The top of base plate (6) is fixedly provided with spring pre-tightening retainer (63) on both sides through screw (54), the spring pre-tightening retainer (63) is provided with clamping groove (45) on one side, the clamping groove (45) is clamped with spring pre-tightening retaining buffer (21), the outer wall of pipe opening (25) of the bottom of back support pipe A (10A) and back support pipe B (10B) is integrally formed with pipe opening fulcrum (26), the pipe opening fulcrum (26) is overlapped on the surface of spring pre-tightening retaining buffer (21); The spring silencer (7) includes arc-shaped fitting piece and circular ring provided with through hole D (38), the back mechanism spring buffer (5) is mushroom-shaped column, the surface of column part of mushroom-shaped column is integrally formed with protrusion (37) vertically, the back mechanism spring buffer (5) is interference embedded with the circular ring of spring silencer (7); The spring pre-tightening retaining buffer (21) includes flat panel and buckle (44) fixed on the back of flat panel, the buckle (44) is clamped with clamping groove (45), the pipe opening fulcrum (26) is overlapped on the front of flat panel.

2. The silent type seat back support structure according to claim 1, wherein The spring pre-tightening holder (63) is provided with a through hole C (47) in the middle for accommodating a screw (54), the end of the screw (54) is provided with a locking nut (61), the spring pre-tightening holder (63) is integrally formed with a round stick A (41) and a round stick B (43) on both sides, the top surface of the base plate (6) is integrally formed with a raised platform, the raised platform is provided with a through hole A (50) and a through hole B (52), the round stick A (41) is embedded in the through hole A (50), and the round stick B (43) is embedded in the through hole B (52).

3. The silent seat back support structure according to claim 1, wherein The top surface of the base plate (6) is integrally formed with a fixed platform (64), and the end of the backrest frame pivot fixing piece (60) is welded and fixedly connected with the fixed platform (64).

4. The silent seat back support structure according to claim 1, wherein The back support pipe lining A (22A) and the back support pipe lining B (22B) are respectively provided with a hole A (32A) and a hole B (32B) for penetrating a positioning screw (4).

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