Seat structure with self-adaptive backrest

Abstract

The utility model relates to the technical field of waist rest seats, in particular to a seat structure with a self-adaptive backrest, which comprises a backrest, a waist rest frame is arranged on the backrest, the upper side of the waist rest frame is arranged on the backrest, a gap is formed between the lower side of the waist rest frame and the backrest, and the waist rest frame is connected to the backrest through a horizontal bolt. The chair has the advantages that the upper side of the waist leaning frame is connected with the chair back, when a user leans on the chair, the waist leaning frame can abut against the lower side of the waist leaning frame, at the moment, the waist leaning frame can deform to a certain degree so as to be matched with the position of the waist, meanwhile, through connection of the horizontal plug pin, the waist leaning frame can downwards rotate to a certain degree when the user leans on the chair, and therefore comfort is improved.

Description

Technical Field

[0001] The present application relates to the technical field of lumbar support seats, and in particular to a seat structure with an adaptive backrest. Background Art

[0002] During the current chair design process, a lumbar support is added to improve user comfort. The lumbar support can support the waist when the user leans on it.

[0003] However, during actual use, the human body's leaning position will change according to the actual situation, and the lumbar support can only support part of the waist, so the comfort is still insufficient and needs to be solved urgently. Utility Model Content

[0004] In order to improve the changes of the backrest in response to back movements, thereby improving comfort, the present application provides a seat structure with an adaptive backrest.

[0005] The present application provides a seat structure with an adaptive backrest, which adopts the following technical solution: a seat structure with an adaptive backrest, comprising a seat back, wherein a lumbar support frame is provided on the seat back, the upper side of the lumbar support frame is provided on the seat back, the lower side of the lumbar support frame has a gap with the seat back, and the lumbar support frame is connected to the seat back by a horizontal pin.

[0006] By adopting the above technical solution, the lumbar support frame is connected to the chair back through the upper side, and when the user leans on it, it will press against the lower side of the lumbar support frame. At this time, the lumbar support frame can produce a certain deformation to adapt to the position of the waist. At the same time, through the connection of the horizontal pin, when leaning on it, the lumbar support frame can produce a certain rotation downward, thereby improving comfort.

[0007] Preferably, the lumbar support frame has sockets arranged at intervals, the horizontal pins are passed through the sockets, and the chair back is provided with protrusions for the sockets to be embedded.

[0008] Preferably, the rear side of the socket is further provided with a support block, and the chair back is provided with a receiving groove for inserting the support block.

[0009] Preferably, the upper side of the lumbar support frame has a contact point, and the chair back is provided with a matching sleeve for the contact point to be embedded in.

[0010] Preferably, there is a gap between the end of the contact point and the bottom of the matching sleeve.

[0011] Preferably, a connecting block is embedded in the protrusion, and the end of the horizontal latch is axially fixed and circumferentially rotatably connected to the connecting block.

[0012] Preferably, the connecting block protrudes outward from the convex block, and the outer side of the connecting block is a rubber ring for contacting the lumbar support frame.

[0013] Preferably, a return spring is provided at the end of the contact point.

[0014] Preferably, there is a gap between the upper and lower sides of the support block and the accommodating groove.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: the lumbar support frame is connected to the chair back through the upper side, and when the user leans on it, it will press against the lower side of the lumbar support frame. At this time, the lumbar support frame can produce a certain deformation to adapt to the position of the waist. At the same time, through the connection of the horizontal pin, when leaning on it, the lumbar support frame can produce a certain rotation downward, thereby improving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of Example 1 of the present application;

[0017] Figure 2 It is a partial exploded view of Example 1 of the present application;

[0018] Figure 3 This is a schematic structural diagram of the waist support frame in Example 1 of the present application;

[0019] Figure 4 is a partial cross-sectional view of Example 2 of the present application;

[0020] Figure 5 is another partial cross-sectional view of Example 2 of the present application, used to illustrate the return spring;

[0021] Figure 6 This is a schematic structural diagram of the connection block in Example 2 of the present application;

[0022] Figure 7 It is a cross-sectional view of the connecting block and the horizontal pin in Example 2 of the present application.

[0023] Explanation of the accompanying reference numerals: 100, chair back; 110, lumbar support frame; 111, socket; 112, protrusion; 113, connecting block; 114, horizontal pin; 115, support block; 116, accommodating groove; 117, contact point; 118, mating sleeve; 120, return spring; 121, rubber ring; 122, limiting ring groove; 123, limiting protrusion. DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the accompanying drawings.

[0025] Example 1: Reference Figure 1The embodiment of the present application discloses a seat structure with an adaptive backrest, including a seat back 100, a lumbar support frame 110 is provided on the seat back 100, the upper side of the lumbar support frame 110 is set on the seat back 100, and there is a gap between the lower side of the lumbar support frame 110 and the seat back 100, and a wire mesh for support (not shown in the figure) is also provided on the lumbar support frame 110 to form a support surface.

[0026] Reference Figure 2 、 Figure 3 The lumbar support frame 110 has spaced-apart sockets 111, and correspondingly, the chair back 100 has a protrusion 112 into which the sockets 111 engage. The lumbar support frame 110 is connected to the chair back 100 via a horizontal latch 114. The horizontal latch 114 passes through the protrusion 112 and the sockets 111. A connecting block 113 is embedded in the protrusion 112, and the horizontal latch 114 is threadedly connected to the connecting block 113.

[0027] To enhance the support provided by the lumbar support frame 110, a support block 115 is provided behind the socket 111, and the chair back 100 has a receiving slot 116 for the support block 115. The support block 115 is generally rectangular, and its integral insertion can distribute the forces acting on the socket 111, improving structural strength and also providing a positioning function during installation.

[0028] Since the lumbar support frame 110 itself is relatively long, the middle part needs to increase the restraining force of deformation, so a resistance point 117 is provided in the middle of the upper side of the lumbar support frame 110, and a matching sleeve 118 is provided on the chair back 100 for the resistance point 117 to be embedded in. In this embodiment, the resistance point 117 is a column, and there is a gap between the end of the resistance point 117 and the bottom of the matching sleeve 118. During the deformation process, on the one hand, the resistance point 117 can play a guiding role when moving in the matching sleeve 118, and on the other hand, when the resistance point 117 contacts the bottom of the matching sleeve 118, it can play a supporting and stroke limiting role.

[0029] It is worth noting that in this embodiment, the outer side of the contact point 117 is a rubber layer with a certain degree of deformation. When leaning on the lumbar support frame 110, the horizontal latch 114 can achieve a relatively small range of movement of the lumbar support frame 110, reducing the stiffness when leaning and improving comfort.

[0030] Example 2: The difference from Example 1 is that, referring to Figure 4 In order to allow the entire lumbar support frame 110 to have a certain range of downward movement, there is a gap between the upper and lower sides of the support block 115 and the accommodating groove 116 in this embodiment, which can facilitate installation and insertion, and also facilitate the rotation of the lumbar support frame 110.

[0031] At the same time, refer to Figure 5A return spring 120 is provided at the end of the contact point 117, which can improve the efficiency of the return and reduce the possibility of the contact point 117 getting stuck.

[0032] Reference Figure 6 、 Figure 7 In this embodiment, the connecting block 113 protrudes from the protruding block 112, and a rubber ring 121 is provided on the outside of the connecting block 113 to contact the lumbar support frame 110. Thus, when the lumbar support frame 110 faces downward, it will first contact the outside of the connecting block 113. At this time, the connecting block 113 may also rotate. Therefore, in this embodiment, the end of the horizontal latch 114 is fixed axially and connected to the connecting block 113 in a circumferentially rotatable manner. Specifically, a retaining ring groove 122 is provided at the end of the horizontal latch 114, and a plurality of retaining protrusions 123 are provided along the circumference of the connecting block 113. When inserted, the retaining protrusions 123 will be embedded in the retaining ring groove 122.

[0033] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A seat structure with an adaptive backrest, comprising a seat back (100), characterized in that: A lumbar support frame (110) is provided on the chair back (100), the upper side of the lumbar support frame (110) is provided on the chair back (100), a gap is formed between the lower side of the lumbar support frame (110) and the chair back (100), and the lumbar support frame (110) is connected to the chair back (100) via a horizontal latch (114).

2. The seat structure with an adaptive backrest according to claim 1, characterized in that: The waist support frame (110) has sockets (111) arranged at intervals, the horizontal pins (114) are inserted into the sockets (111), and the chair back (100) is provided with a protrusion (112) for the sockets (111) to be embedded.

3. The seat structure with an adaptive backrest according to claim 2, characterized in that: The socket (111) further has a support block (115) on the rear side, and the chair back (100) has a receiving groove (116) for inserting the support block (115).

4. The seat structure with an adaptive backrest according to claim 3, characterized in that: The upper side of the waist support frame (110) has a contact point (117), and the chair back (100) is provided with a matching sleeve (118) for the contact point (117) to be embedded.

5. The seat structure with an adaptive backrest according to claim 4, characterized in that: There is a gap between the end of the contact point (117) and the bottom of the matching sleeve (118).

6. The seat structure with an adaptive backrest according to claim 5, characterized in that: A connecting block (113) is embedded in the protrusion (112), and the end of the horizontal latch (114) is axially fixed and circumferentially rotatably connected to the connecting block (113).

7. The seat structure with an adaptive backrest according to claim 6, characterized in that: The connecting block (113) protrudes outward from the protruding block (112), and the outer side of the connecting block (113) is a rubber ring (121) for contacting the waist support frame (110).

8. The seat structure with an adaptive backrest according to claim 7, characterized in that: A return spring (120) is provided at the end of the contact point (117).

9. The seat structure with an adaptive backrest according to claim 8, characterized in that: There is a gap between the upper and lower sides of the support block (115) and the accommodating groove (116).

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