Backrest mechanism capable of quickly adjusting headrest and waist support in follow-up manner for seat

Abstract

The utility model discloses a seat backrest mechanism capable of quickly adjusting a headrest and a waist support in a follow-up manner, which comprises a seat, angle adjusters movably arranged on two sides of the seat, and a backrest arranged on the inner sides of the angle adjusters, a backrest inner framework is arranged in the backrest, the backrest inner framework comprises an upper transverse plate arranged above the inner side of the backrest inner framework, and a lower transverse plate arranged above the inner side of the backrest inner framework. A sliding assembly is arranged on one side of the upper transverse plate and extends out of the backrest, an upper sliding plate is arranged on one side, located on the outer surface of the backrest, of the sliding assembly, a hinge is arranged at the bottom of one side of the upper sliding plate, and a lower sliding plate in butt joint with the upper sliding plate is arranged on one side of the hinge. The upper sliding plate and the lower sliding plate can slide relative to the backrest under the action of the sliding assembly. According to the backrest mechanism, when a human body lies down, it can be guaranteed that the head and waist supporting points are static relative to the human body, the head and the waist are effectively supported all the time, and the problem that the head and waist supporting points move after the human body lies down is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a backrest mechanism for a seat which can quickly and flexibly adjust a headrest and a waist support. Background Art

[0002] Chairs are a type of furniture that is widely used in daily life and work. They usually include a base, backrest, support structure, armrests and other parts. In order to meet people's personalized needs and bring a more comfortable and healthy use experience, the structure and function of the chair are constantly improving. When users use chairs, they often rely on the base and backrest to support their hips and backs, while the support for the waist and head is relatively weak. The cervical spine and spine will bear the pressure of the upper body weight. In the long run, symptoms such as cervical spondylosis and lumbar muscle strain will occur, causing inconvenience to people in learning, life and work.

[0003] In recent years, in order to provide support for the head and waist, seats with headrests and lumbar supports are appearing on the market. The headrests and lumbar supports are connected to the backrests to provide good support for the user's head and waist, making their sitting posture upright and having good protection for the cervical and lumbar vertebrae. However, there are still some problems with the existing seats with headrests and lumbar supports. When a person sits on the seat and raises or lowers the backrest to lie down, the headrest and lumbar support will move upward, causing the support for the head and waist to shift, making it impossible to effectively support the head and waist. Based on this, we have developed a backrest mechanism for a seat with a headrest and lumbar support that can quickly adjust. Utility Model Content

[0004] The utility model aims to solve the technical problems in the prior art and proposes a backrest mechanism for a seat which can quickly adjust a headrest and a waist support.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a backrest mechanism for a seat with a headrest and a lumbar support that can be quickly adjusted with the seat, comprising a seat, an angle adjuster movably arranged on both sides of the seat, and a backrest arranged on the inner side of the angle adjuster, wherein an inner back frame is arranged in the backrest, and the inner back frame includes an upper cross plate arranged on the upper inner side thereof, a sliding assembly is arranged on one side of the upper cross plate, and the sliding assembly extends out of the backrest, and an upper slide plate is arranged on one side of the sliding assembly located on the outer surface of the backrest, a hinge is arranged at the bottom of one side of the upper slide plate, and a lower slide plate connected to the upper slide plate is arranged on one side of the hinge, and the upper slide plate and the lower slide plate can slide relative to the backrest under the action of the sliding assembly, and a backrest sponge is arranged on one side of the upper slide plate and the lower slide plate, and a bulge is formed below the backrest sponge for supporting the waist, a headrest is arranged on the top of one side of the backrest sponge, and a connecting pad is integrally connected to the other side of the backrest sponge, and the connecting pad is connected to the top of the seat.

[0006] In a preferred embodiment, a pulley assembly is disposed in the middle of the inner side of the backrest inner frame, and the rolling surface of the pulley assembly is attached to the outer wall of the lower slide plate.

[0007] In a preferred embodiment, an elastic reset assembly is further disposed between the backrest inner frame and the upper slide plate. The elastic reset assembly is used to provide an elastic force that can be reset after the upper slide plate and the lower slide plate slide relative to the backrest.

[0008] In a preferred embodiment, the backrest includes a first receiving groove, a second receiving groove, a third receiving groove, and a fourth receiving groove. The first receiving groove is formed in the outer wall of the backrest close to the upper slide plate and the lower slide plate. The second receiving groove is formed in the outer wall of the backrest located outside the first receiving groove. The third receiving groove is formed below the second receiving groove and communicates with it. The fourth receiving groove is formed in the outer wall of the backrest located below the first receiving groove.

[0009] In a preferred embodiment, the sliding assembly includes a connecting plate disposed on one side of the upper cross plate, a sliding sleeve connected to one side of the connecting plate, and a plug plate that can be slidably disposed in the matching sliding sleeve. One side of the plug plate is connected to the upper slide plate. The connecting plate is inside the backrest, and the sliding sleeve and the plug plate are in the first receiving groove.

[0010] In a preferred embodiment, the pulley assembly includes a lower cross plate disposed in the middle of the inner side of the backrest inner frame, and a pulley disposed on the side of the lower cross plate close to the lower slide plate. The pulley is attached to the lower slide plate, and the pulley is in the fourth receiving groove.

[0011] In a preferred embodiment, the elastic reset assembly includes a lower connecting seat disposed on the outer wall of the lower cross plate and on the same side as the pulley, an upper connecting seat disposed on the outer wall of the upper slide plate and perpendicular to the lower connecting seat, a round rod disposed at the bottom of the upper connecting seat and passing through the lower connecting seat, and a spring sleeved on the round rod. The two ends of the spring respectively abut against the upper connecting seat and the lower connecting seat. The lower connecting seat is in the third receiving groove, and the upper connecting seat, the round rod, and the spring are in the second receiving groove. The bottom end of the round rod passes through the lower connecting seat and extends into the third receiving groove.

[0012] Compared with the prior art, the present utility model provides a backrest mechanism for a seat with a headrest and a lumbar support that can be quickly adjusted following the movement of the body. Through the cooperation of the sliding sleeve and the insertion plate in the sliding assembly, it is convenient for the backrest sponge and the insertion plate to move conformally through the sliding sleeve, ensuring that the protrusion of the backrest sponge, the headrest, and the human body are relatively stationary and always maintain support. Through the cooperation of the lower connecting seat, the upper connecting seat, the round rod, and the spring in the elastic reset assembly, when the human body leans on the backrest sponge and lies down, the upper connecting seat and the round rod move along with the backrest sponge, compressing the spring. When the human body sits upright, the compressed spring pushes the upper sliding plate to drive the insertion plate to move and move conformally through the slide rail, ensuring that the backrest sponge and the headrest return to their original positions. This backrest mechanism can ensure that the support points of the head and the waist are relatively stationary with respect to the human body when the human body lies down, always maintaining effective support for the head and the waist, and solving the problem of the movement of the support points of the head and the waist after lying down. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is a three-dimensional structural schematic diagram of the inner skeleton of the backrest of the present utility model;

[0015] Figure 3 is a three-dimensional structural schematic diagram of the backrest of the present utility model;

[0016] Figure 4 is a three-dimensional structural schematic diagram of the backrest sponge of the present utility model;

[0017] Figure 5 is a three-dimensional structural schematic diagram of another angle of the present utility model.

[0018] In the figure: 1, seat; 2, angle adjuster; 3, backrest; 31, first receiving groove; 32, second receiving groove; 33, third receiving groove; 34, fourth receiving groove; 4, inner skeleton of the backrest; 41, lower cross plate; 42, upper cross plate; 43, connecting plate; 44, sliding sleeve; 45, insertion plate; 46, lower connecting seat; 47, round rod; 48, upper connecting seat; 49, spring; 410, pulley; 5, upper sliding plate; 6, hinge; 7, lower sliding plate; 8, backrest sponge; 9, headrest. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0020] This specific embodiment is only an explanation of the present utility model and does not limit the present utility model. Those skilled in the art can make modifications that contribute creatively to this embodiment according to their needs after reading this description, but as long as they are within the scope of the claims of the present utility model, they are protected by the Patent Law.

[0021] The utility model discloses a seat backrest mechanism capable of quickly adjusting the headrest and lumbar support, which solves the technical problems in the prior art. The overall idea is as follows:

[0022] Embodiment 1:

[0023] like Figures 1 - 5 As shown; a backrest mechanism for a seat with a headrest and a lumbar support that can be quickly adjusted with the seat, comprising a seat 1, an adjuster 2 movably arranged on both sides of the seat 1, and a backrest 3 arranged on the inner side of the adjuster 2, a backrest inner frame 4 is arranged in the backrest 3, the backrest inner frame 4 includes an upper cross plate 42 arranged on the upper inner side thereof, a sliding assembly is arranged on one side of the upper cross plate 42, the sliding assembly extends out of the backrest 3, an upper slide plate 5 is arranged on one side of the sliding assembly located on the outer surface of the backrest 3, a hinge 6 is arranged at the bottom of one side of the upper slide plate 5, a lower slide plate 7 connected to the upper slide plate 5 is arranged on one side of the hinge 6, the upper slide plate 5 and the lower slide plate 7 can slide relative to the backrest 3 under the action of the sliding assembly, a backrest sponge 8 is arranged on one side of the upper slide plate 5 and the lower slide plate 7, a bulge is formed below the backrest sponge 8 for supporting the waist, a headrest 9 is arranged on the top of one side of the backrest sponge 8, and a connecting pad is integrally connected to the other side of the backrest sponge 8, and the connecting pad is connected to the top of the seat 1;

[0024] When a person sits on the seat 1 and lies down, the back sponge 8 and the headrest 9 can move with the body through the sliding assembly, ensuring that the protrusion of the back sponge 8 and the headrest 9 are relatively still with the human body and always maintain support.

[0025] During specific implementation, in order to improve the stability of the lower slide plate 7 , a pulley assembly is provided in the middle of the inner side of the backrest inner frame 4 , and the rolling surface of the pulley assembly is in contact with the outer wall of the lower slide plate 7 .

[0026] During specific implementation, in order to facilitate the human body to return to normal sitting on the seat 1 from lying down, the backrest sponge 8 is reset with the backrest 3, and an elastic reset component is also provided between the backrest inner frame 4 and the upper slide plate 5. The elastic reset component is used to provide elastic force for restoring the upper slide plate 5 and the lower slide plate 7 after they slide relative to the backrest 3.

[0027] In a specific implementation, the backrest 3 includes a receiving groove 1 31, a receiving groove 2 32, a receiving groove 33 and a receiving groove 4 34. The receiving groove 1 31 is arranged on the outer wall of the backrest 3 on one side close to the upper slide 5 and the lower slide 7. The receiving groove 2 32 is arranged on the outer wall of the backrest 3 located outside the receiving groove 1 31. The receiving groove 33 is arranged below the receiving groove 2 32 and is connected thereto. The receiving groove 4 34 is arranged on the outer wall of the backrest 3 located below the receiving groove 1 31.

[0028] In specific implementation, the sliding component includes a connecting plate 43 arranged on one side of the upper cross plate 42, a sliding sleeve 44 connected to one side of the connecting plate 43, and a plug plate 45 slidably arranged in a matching sliding sleeve 44. One side of the plug plate 45 is connected to the upper sliding plate 5. The connecting plate 43 is inside the backrest 3, and the sliding sleeve 44 and the plug plate 45 are in the first receiving groove 31. Through the arrangement of the sliding sleeve 44 and the plug plate 45, the backrest sponge 8 can slide relative to the backrest 3 conveniently.

[0029] In specific implementation, the pulley component includes a lower cross plate 41 arranged in the middle of the inner side of the backrest inner frame 4, and a pulley 410 arranged on the lower cross plate 41 close to one side of the lower sliding plate 7. The pulley 410 is in contact with the lower sliding plate 7, and the pulley 410 is in the fourth receiving groove 34. Through the arrangement of the pulley 410, the lower sliding plate 7 can be supported to a certain extent to make it stable.

[0030] In specific implementation, the elastic reset component includes a lower connecting seat 46 arranged on the outer wall of the lower cross plate 41 and on the same side as the pulley 410, an upper connecting seat 48 arranged on the outer wall of the upper sliding plate 5 and perpendicular to the lower connecting seat 46, a round rod 47 arranged at the bottom of the upper connecting seat 48 and passing through the lower connecting seat 46, and a spring 49 sleeved on the round rod 47. The two ends of the spring 49 respectively abut against the upper connecting seat 48 and the lower connecting seat 46. The lower connecting seat 46 is in the third receiving groove 33, and the upper connecting seat 48, the round rod 47 and the spring 49 are in the second receiving groove 32. And the bottom end of the round rod 47 passes through the lower connecting seat 46 and extends into the third receiving groove 33. When a person lies down on the backrest sponge 8, the upper connecting seat 48 and the round rod 47 move along with the backrest sponge 8, and the spring 49 can be compressed. When a person sits upright, the compressed spring 49 pushes the upper sliding plate to drive the plug plate to move, and moves along with the shape of the slide rail, ensuring that the backrest sponge 8 and the headrest 9 return to the original position.

[0031] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the present invention. Those who are familiar with the technology in the art can obviously make various modifications to the embodiments easily, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A backrest mechanism for a seat with a headrest and a lumbar support that can be quickly adjusted, comprising a seat (1), a recliner (2) movably arranged on both sides of the seat (1), and a backrest (3) arranged inside the recliner (2), characterized in that: The backrest (3) is provided with an inner backrest frame (4), the inner backrest frame (4) includes an upper horizontal plate (42) arranged on the upper inner side thereof, a sliding assembly is provided on one side of the upper horizontal plate (42), the sliding assembly extends out of the backrest (3), an upper slide plate (5) is provided on one side of the sliding assembly located on the outer surface of the backrest (3), a hinge (6) is provided at the bottom of one side of the upper slide plate (5), a lower slide plate (7) connected to the upper slide plate (5) is provided on one side of the hinge (6), the upper slide plate (5) and the lower slide plate (7) can slide relative to the backrest (3) under the action of the sliding assembly, a backrest sponge (8) is provided on one side of the upper slide plate (5) and the lower slide plate (7), a bulge is formed below the backrest sponge (8) for supporting the waist, a headrest (9) is provided on the top of one side of the backrest sponge (8), and a connecting pad is integrally connected to the other side of the backrest sponge (8), and the connecting pad is connected to the top of the seat (1).

2. A seat backrest mechanism with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 1, characterized in that: A pulley assembly is provided in the middle of the inner side of the backrest inner frame (4), and the rolling surface of the pulley assembly is fitted on the outer wall of the lower slide plate (7).

3. A seat backrest mechanism with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 2, characterized in that: An elastic reset component is also provided between the backrest inner frame (4) and the upper slide plate (5), and the elastic reset component is used to provide elastic force for reset after the upper slide plate (5) and the lower slide plate (7) slide relative to the backrest (3).

4. The backrest mechanism for a seat with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 3, characterized in that: The backrest (3) comprises a first accommodating groove (31), a second accommodating groove (32), a third accommodating groove (33) and a fourth accommodating groove (34); the first accommodating groove (31) is arranged on an outer wall of the backrest (3) close to the upper slide plate (5) and the lower slide plate (7); the second accommodating groove (32) is arranged on an outer wall of the backrest (3) located outside the first accommodating groove (31); the third accommodating groove (33) is arranged below the second accommodating groove (32) and is connected thereto; and the fourth accommodating groove (34) is arranged on an outer wall of the backrest (3) located below the first accommodating groove (31).

5. The backrest mechanism for a chair with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 4, characterized in that: The sliding assembly comprises a connecting plate (43) arranged on one side of the upper horizontal plate (42), a sliding sleeve (44) connected to one side of the connecting plate (43), and an inserting plate (45) slidably arranged in the matching sliding sleeve (44), and one side of the inserting plate (45) is connected to the upper sliding plate (5), the connecting plate (43) is located inside the backrest (3), and the sliding sleeve (44) and the inserting plate (45) are located in a receiving groove (31).

6. The backrest mechanism for a chair with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 5, characterized in that: The pulley assembly comprises a lower transverse plate (41) arranged at the middle of the inner side of the backrest inner frame (4), and a pulley (410) arranged on the side of the lower transverse plate (41) close to the lower slide plate (7), wherein the pulley (410) is in contact with the lower slide plate (7), and the pulley (410) is located in the receiving groove four (34).

7. A seat backrest mechanism with a headrest and a lumbar support capable of rapid follow-up adjustment according to claim 6, characterized in that: The elastic reset assembly includes a lower connecting seat (46) arranged on the outer wall of the lower horizontal plate (41) and on the same side as the pulley (410), an upper connecting seat (48) arranged on the outer wall of the upper slide plate (5) and perpendicular to the lower connecting seat (46), a round rod (47) arranged at the bottom of the upper connecting seat (48) and passing through the lower connecting seat (46), and a spring (49) sleeved on the round rod (47), the two ends of the spring (49) respectively abut against the upper connecting seat (48) and the lower connecting seat (46), the lower connecting seat (46) is located in the receiving groove three (33), the upper connecting seat (48), the round rod (47) and the spring (49) are located in the receiving groove two (32), and the bottom end of the round rod (47) passes through the lower connecting seat (46) and extends to the receiving groove three (33).

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