Mounting structure of seat backrest

Abstract

The utility model relates to the technical field of furniture articles, in particular to a seat backrest mounting structure which comprises a back plate and a connecting frame used for supporting the back plate, a blind hole is formed in the side, facing the back plate, of the connecting frame, a threaded hole is formed in the position, corresponding to the blind hole, of the back plate, and the threaded hole is connected with the connecting frame. A fixing screw is connected between the threaded hole and the blind hole, the sharp end of the fixing screw is in threaded connection with the threaded hole, and the flat end of the fixing screw is clamped in the blind hole; the back plate is fixed on the connecting frame through fixing screws; the outer side of the back plate is covered with a soft wrapping layer, and the soft wrapping layer extends into the blind holes to completely wrap the fixing screws and the threaded holes so that the fixing screws can be hidden between the back plate and the connecting frame. The back plate and the connecting frame are connected through the fixing screws and the blind holes, the fixing screws and the blind holes are wrapped and hidden through the soft wrapping layer, and the fixing screws are arranged on the inner side and are invisible in the peripheral sight range, so that the attractiveness of the chair is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture products, in particular to an installation structure of a seat back. Background Art

[0002] Chairs, a common piece of furniture in daily life, are divided into multiple categories according to different usage environments, such as office chairs, dining chairs, bar chairs, leisure chairs, reclining chairs, special chairs, children's chairs, etc.; and according to the different materials used, chairs are divided into solid wood chairs, glass chairs, wrought iron chairs, plastic chairs, fabric chairs, leather chairs, foam chairs, etc.; generally speaking, chairs are usually composed of chair legs, seat cushions and backrests; they can not only relieve people's fatigue when standing for a long time, but also improve comfort.

[0003] In the production process of existing chairs, the connection between the backrest and other parts is mostly directly set up with through holes, and the backrest is fixedly connected to other parts of the chair by multiple screws. This connection method is visually visible because the through holes and screws are mostly set on the outer surface, making the overall appearance not simple. Although some of them use stickers of the same color as the backrest to stick on the through holes to achieve the purpose of hiding, the stickers are easy to fall off during use, resulting in poor appearance. In addition, the installation process of multiple components through multiple screws is cumbersome and complicated, which makes the backrest have many processes and difficult demolding during the workshop production process. Utility Model Content

[0004] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the utility model is to provide a mounting structure of a seat back, which achieves both beautiful and stable fixing effect by setting blind holes of specific shapes on the back panel for precise docking with the connecting frame and concealing the connecting parts with a soft covering layer.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mounting structure for a seat back comprises a back plate and a connecting frame for supporting the back plate, wherein a blind hole is provided on a side of the connecting frame facing the back plate, a threaded hole is provided on the back plate at a position corresponding to the blind hole, a fixing screw is connected between the threaded hole and the blind hole, a pointed end of the fixing screw is threadedly connected to the threaded hole, and a flat end of the fixing screw is clamped in the blind hole; the back plate is fixed to the connecting frame by the fixing screw; the outer side of the back plate is covered with a soft covering layer, and the soft covering layer extends to the inside of the blind hole to completely wrap the fixing screw and the threaded hole so that the fixing screw is hidden between the back plate and the connecting frame.

[0007] Preferably, the blind hole is composed of two circular holes connected to each other, wherein the diameter of the upper circular hole is larger than the diameter of the flat end of the fixing screw, and the diameter of the lower circular hole is smaller than the diameter of the flat end of the fixing screw, so that the blind hole has a figure "8" shape.

[0008] Preferably, a plurality of the blind holes are provided, and the plurality of the blind holes are equidistantly distributed vertically on the connection frame, and edges of the blind holes are chamfered to reduce friction between the fixing screws and the blind holes when they are installed.

[0009] Preferably, the connecting frame includes a rectangular frame and a support rod arranged on the rectangular frame, the bottom end of the rectangular frame is connected to a chair leg, and the chair leg and the rectangular frame are integrally formed by welding; at least two support rods are provided, the two support rods are arranged perpendicular to the rectangular frame, and the support rods and the rectangular frame are detachably connected.

[0010] Preferably, a seat cushion is fixedly connected to the rectangular frame.

[0011] Preferably, the back plate has a curvature, and the circumference of the top end of the back plate is greater than the circumference of the bottom end, so that the back plate has a fan-shaped structure.

[0012] Preferably, a buffer material is filled between the soft envelope layer and the back plate.

[0013] In summary, the beneficial effects of the utility model are:

[0014] The utility model connects the back plate and the connecting frame by using fixing screws and blind holes, and uses a soft covering layer to wrap and hide the fixing screws and the blind holes. Since the fixing screws are arranged on the inner side and are not visible within the peripheral field of vision, the overall appearance of the connecting frame and the back plate is more concise and generous, thereby improving the aesthetics of the chair. At the same time, the blind holes and the fixing screws are connected by a snap-fitting manner, which makes the installation between the back plate and the connecting frame simpler and convenient to disassemble, and is also more firm and reliable in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the installation structure of the seat back of the utility model;

[0016] Figure 2 It is an exploded view of the installation structure of the seat back of the utility model;

[0017] Figure 3 yes Figure 2 A magnified view of the structure at center A;

[0018] Figure 4 It is a front view of the mounting structure of the seat back of the utility model;

[0019] Figure 5 yes Figure 4Sectional view of the AA plane;

[0020] Figure 6 yes Figure 5 A magnified view of the structure at B in the middle.

[0021] Description of reference numerals in the figures:

[0022] 1. Back panel; 11. Threaded hole; 2. Connecting frame; 21. Rectangular frame; 22. Support rod; 3. Blind hole; 4. Fixing screw; 5. Soft covering layer; 6. Chair leg; 7. Seat cushion; 8. Cushioning material. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0025] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] The following is combined with Figure 1-6 , an embodiment of the installation structure of a seat back of the utility model is further described in detail.

[0027] A seat back mounting structure, such as Figures 4 to 6As shown, it includes a back plate 1 and a connecting frame 2 for supporting the back plate 1, a blind hole 3 is opened on the side of the connecting frame 2 facing the back plate 1, a threaded hole 11 is opened at the position of the back plate 1 corresponding to the blind hole 3, a fixing screw 4 is connected between the threaded hole 11 and the blind hole 3, the pointed end of the fixing screw 4 is threadedly connected to the threaded hole 11, and the flat end of the fixing screw 4 is clamped in the blind hole 3; the back plate 1 is fixed to the connecting frame 2 by the fixing screw 4; the outer side of the back plate 1 is covered with a soft coating 5, the soft coating 5 extends to the inside of the blind hole 3, and completely wraps the fixing screw 4 and the threaded hole 11, so that the fixing screw 4 is hidden between the back plate 1 and the connecting frame 2.

[0028] Specifically, during the production and installation process of the chair, the back plate 1 and the connecting frame 2 are connected by the fixing screws 4 and the blind holes 3, and the fixing screws 4 and the blind holes 3 are wrapped and hidden by the soft cover layer 5. Since the fixing screws 4 are arranged on the inner side and are not visible in the peripheral visual range, the overall appearance of the connecting frame 2 and the backrest plate 1 is more concise and generous, thereby improving the aesthetics of the chair; at the same time, the blind holes 3 and the fixing screws 4 are connected by a snap-fit ​​method, which makes the installation between the back plate 1 and the connecting frame 2 simpler, convenient to disassemble, and more firm and reliable in use;

[0029] Among them, the soft coating 5 is made of wear-resistant and tear-resistant polymer synthetic material to ensure its stability and durability during long-term use; so that during installation, the back panel 1 and the connecting frame 2 can be snap-connected by the fixing screws 4, and because the blind holes 3 and the fixing screws 4 are both arranged on the inner side, after the splicing is completed, the blind holes 3 and the fixing screws 4 are blocked by the back panel 1 and the connecting frame 2 and do not leak out; at the same time, the soft coating 5 is put on the outer side of the back panel 1, and the soft coating 5 further fits the fixing screws 4 and the blind holes 3, so that the blind holes 3 and the fixing screws 4 can be perfectly hidden, thereby improving the aesthetics of the chair.

[0030] In this embodiment, if Figure 3 As shown, the blind hole 3 is composed of two circular holes connected to each other, wherein the diameter of the upper circular hole is larger than the diameter of the flat end of the fixing screw 4, and the diameter of the lower circular hole is smaller than the diameter of the flat end of the fixing screw 4, so that the blind hole 3 is in the shape of a figure "8".

[0031] Specifically, the purpose of setting the blind hole 3 into an "8"-shaped structure is that when the fixing screw 4 is inserted into the blind hole 3, the flat end of the fixing screw 4 is first inserted from the upper circular hole and then falls into the lower circular hole. Since the diameter of the lower circular hole is smaller than the diameter of the flat end of the fixing screw 4, the fixing screw 4 is clamped in the blind hole 3, thereby fixing the back panel 1 and the connecting frame 2. In other words, when the back panel 1 needs to be removed, it is only necessary to lift the fixing screw 4 toward the upper circular hole to separate the back panel 1 from the connecting frame 2. Not only is the installation convenient, but the subsequent maintenance and replacement are also simple.

[0032] In order to improve the stability between the back panel 1 and the connecting frame 2, a plurality of blind holes 3 are provided. The plurality of blind holes 3 are equidistantly distributed vertically on the connecting frame 2, and the edges of the blind holes 3 are chamfered to reduce the friction between the fixing screws 4 and the blind holes 3 when they are installed. The fixing screws 4 are set corresponding to the number of blind holes 3.

[0033] In this embodiment, if Figure 1 , 2 As shown, the connecting frame 2 includes a rectangular frame 21 and a support rod 22 arranged on the rectangular frame 21. The bottom end of the rectangular frame 21 is connected to a chair leg, and the chair leg and the rectangular frame 21 are integrally formed by welding; at least two support rods 22 are provided, and the two support rods 22 are arranged perpendicular to the rectangular frame 21, and the support rods 22 and the rectangular frame 21 are detachably connected.

[0034] Specifically, the connecting frame 2 is made of high-strength alloy material to improve its stability and firmness; in addition, the rectangular frame 21, the support rod 22 and the chair legs are all set to a hollow structure, which can not only save materials and reduce production costs, but also reduce weight and facilitate carrying; and the support rod 22 serves as a mounting bracket for the chair back, so that the back panel 1 can be quickly spliced ​​with the connecting frame 2 and provide supporting force. The support rod 22 can be connected to the rectangular frame by screw fixing or mortise and tenon clamping.

[0035] It is worth noting that in order to further facilitate the transportation of the chair and improve the installation efficiency of the chair; in addition to being welded to the rectangular frame, the chair legs can also be spliced ​​by threaded connection, that is, a threaded column is set on the top of the chair leg, and threaded through holes are opened at the four corners of the rectangular frame 21. By rotating the chair legs, the threaded column and the threaded through hole are threadedly connected, thereby realizing quick installation of the chair.

[0036] In this embodiment, a seat cushion is fixedly connected to the rectangular frame 21. The seat cushion also adopts a soft-pack structure and is filled with rubber or sponge. It is comfortable and breathable while also improving the sitting feeling.

[0037] In this embodiment, the back plate 1 has a curvature, and the circumference of the top end of the back plate 1 is greater than the circumference of the bottom end, so that the back plate 1 presents a fan-shaped structure.

[0038] Specifically, the backboard 1 is configured to be in an arc shape that fits the back of the human body, and presents a fan-shaped structure that is wide at the top and narrow at the bottom. On the one hand, it can provide stable support for the user's back, and on the other hand, the two sides of the arc structure can better wrap the back, so that the sitting posture can be adjusted.

[0039] In order to further enhance the sitting comfort of the chair, a cushioning material 8 is filled between the soft covering layer 5 and the back panel 1. The cushioning material 8 may be made of sponge, rubber or cotton. The cushioning material 8 can also provide a certain degree of protection for the internal installation structure.

[0040] The installation method of the utility model backrest is as follows:

[0041] During installation, align the pointed end of the fixing screw 4 on the back plate 1 with the threaded hole 11 on the back plate 1, and screw the fixing screw 4 into the threaded hole 11 by rotating it, so that the fixing screw 4 is fixed on the back plate 1. At the same time, the flat end of the fixing screw 4 is clamped into the busy blind hole 3, so that the fixing screw 4 enters the blind hole 3 and fits tightly with the connecting frame 2; and because the diameter of the upper circular hole of the blind hole 3 is slightly larger than that of the fixing screw 4, and the diameter of the lower circular hole is smaller than that of the fixing screw 4, the fixing screw 4 can be clamped on the lower circular hole, so that the back plate 1 can be quickly installed on the connecting frame 2, and the edge of the blind hole 3 is chamfered, so that the fixing screw 4 can be easily inserted and clamped into place;

[0042] Then, in order to hide the fixing structure, the inner side of the back plate 1 is covered with a soft coating 5, which not only covers the surface of the back plate 1, but also extends to the inside of the blind hole 3, completely covering the fixing screws 4 and the blind hole 3. In this way, no fixing parts can be seen from the appearance, ensuring the overall aesthetics of the chair;

[0043] Finally, the seat cushion is installed on the connecting frame 2 to complete the installation of the chair.

[0044] The seat back installation structure of the utility model can not only quickly complete the installation of the seat back, but also hide the fixing screws 4 used for connection, which can not only ensure the firmness of the connection, but also improve the aesthetics and comfort of the chair. It is very suitable for the manufacture and use of chairs in modern home environments.

[0045] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A seat back mounting structure, comprising a back plate and a connecting frame for supporting the back plate, characterized in that: A blind hole is provided on one side of the connection frame facing the back plate, a threaded hole is provided on the back plate at a position corresponding to the blind hole, a fixing screw is connected between the threaded hole and the blind hole, the pointed end of the fixing screw is threadedly connected to the threaded hole, and the flat end of the fixing screw is clamped in the blind hole; the back plate is fixed to the connection frame by the fixing screw; the outer side of the back plate is covered with a soft covering layer, and the soft covering layer extends to the inside of the blind hole to completely wrap the fixing screw and the threaded hole, so that the fixing screw is hidden between the back plate and the connection frame.

2. The seat back mounting structure according to claim 1, characterized in that: The blind hole is composed of two circular holes connected to each other, wherein the diameter of the upper circular hole is larger than the diameter of the flat end of the fixing screw, and the diameter of the lower circular hole is smaller than the diameter of the flat end of the fixing screw, so that the blind hole is in the shape of a figure "8".

3. The seat back mounting structure according to claim 2, characterized in that: There are multiple blind holes, which are equidistantly distributed vertically on the connection frame, and the edges of the blind holes are chamfered to reduce the friction between the fixing screws and the blind holes when they are installed.

4. The seat back mounting structure according to claim 3, characterized in that: The connecting frame includes a rectangular frame and a support rod arranged on the rectangular frame, the bottom end of the rectangular frame is connected to a chair leg, and the chair leg and the rectangular frame are integrally formed by welding; at least two support rods are provided, the two support rods are arranged perpendicular to the rectangular frame, and the support rods and the rectangular frame are detachably connected.

5. The seat back mounting structure according to claim 4, characterized in that: The rectangular frame is also fixedly connected with a seat cushion.

6. The seat back mounting structure according to claim 5, characterized in that: The back plate has an arc, and the perimeter of the top end of the back plate is greater than the perimeter of the bottom end, so that the back plate has a fan-shaped structure.

7. The seat back mounting structure according to claim 6, characterized in that: The space between the soft cover layer and the back plate is filled with a buffer material.

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