Universal backrest mounting structure

Abstract

The universal backrest mounting structure comprises a backrest and a supporting piece, the supporting piece is detachably arranged on the backrest, a positioning protrusion is arranged at the front end of the supporting piece, and a positioning hole matched with the positioning protrusion in a clamped mode is formed in the rear end of the backrest; the side wall, close to the front end, of the supporting piece extends outwards to form a threaded connection part, a connecting hole is formed in the threaded connection part, a threaded hole is formed in the position, close to the positioning hole, of the rear end of the backrest, and when the positioning protrusion is clamped into the positioning hole, the connecting hole is aligned to the threaded hole, and the connecting hole and the threaded hole are fixedly connected through a screw. The same interface mode is reserved on the rear side of the backrest, namely the mode of the positioning holes and the side threaded holes, no matter which shape or functional structure the supporting piece is, the front end of the supporting piece is always arranged to be the positioning protrusion and the threaded connection part matched with the backrest interface, and the connecting mode of the supporting piece and the backrest is the same. Therefore, the backrest with the same style and shape only needs to be provided with a pair of molds, and the production burden of manufacturers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a universal backrest mounting structure. Background Art

[0002] As people's lifestyles change, people now often need to sit for a long time for daily work or study, which will put a heavy burden on the lumbar and cervical vertebrae of the human body. In order to maintain the health of users, existing chairs usually have backrests to provide stable support for the user's back.

[0003] At the same time, the seat backrest and back frame are usually connected by a connecting structure. In order to meet the various needs of customers, there are many seats with different connecting structures. Even the same manufacturer faces the problem of using different connection methods between the backrest and the back frame; for example: the connecting structure is a fixed structure, the backrest and the back frame remain fixed; the connecting structure is an articulated structure, the backrest can rotate relative to the back frame; the connecting structure is a sliding structure, the backrest can slide relative to the back frame, and so on.

[0004] Although the backrest structure and appearance style of the above-mentioned seats are roughly the same, and more often different seats use the same appearance style of backrest, based on the reasons described in the above paragraphs, that is, for different types of connection structures, due to their different structures, the backrest must be designed to adapt to the corresponding connection structure to adapt to different connection methods, such as some connection structures and backrests are directly connected by screws, some are connected to the backrest by twist connectors, and some are directly rotated on the backrest. This leads to the manufacturer needing to make the corresponding backrest molds for different types of connection structures separately, that is, the backrests made by these molds are basically the same in appearance style, but the connection structure design at the rear end of the backrest is different, which leads to a significant increase in the cost of producing and processing seats. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, a universal backrest mounting structure is provided, by opening a positioning hole and a threaded hole for connection on the back side of the backrest, and by providing matching positioning protrusions and threaded connecting parts at the front ends of support members of various shapes and functions, so that the same backrest can be adapted to connect to various different support members, or in other words, backrests of different styles and shapes adopting this interface method can also be adapted to connect to various different support members. Manufacturers no longer need to open different backrest molds for different interface methods, thereby greatly reducing the overall production and processing costs of the seat.

[0006] The effect of the utility model is achieved in this way:

[0007] The present application provides a universal backrest mounting structure, comprising a backrest and a support member, wherein the support member is detachably arranged on the backrest, a positioning protrusion is arranged at the front end of the support member, and a positioning hole which is snap-fitted with the positioning protrusion is opened at the rear end of the backrest; a screw-connecting portion is extended outward from the side wall of the support member close to the front end, a connecting hole is opened on the screw-connecting portion, and a threaded hole is opened at the rear end of the backrest close to the positioning hole, and when the positioning protrusion is snapped into the positioning hole, the connecting hole is aligned with the threaded hole so that the screw-connecting portion and the backrest are fixed by screws.

[0008] With the above solution, the same interface method is reserved on the back side of the backrest, that is, a positioning hole plus a side threaded hole. No matter what shape the support member is or what functional structure it has, the front end of the support member is always configured with a positioning protrusion and a threaded portion that are compatible with the backrest interface, and the connection method with the backrest is the same. Therefore, the same style and shape of the backrest can be connected to different support members according to the consumer's choice. The same style and shape of the backrest only requires one mold, which greatly reduces the manufacturer's production and stocking burden.

[0009] Furthermore, the positioning hole is a stepped countersunk hole, and the positioning protrusion is a stepped protrusion opposite to the positioning hole, which further improves the connection strength between the support member and the backrest, and the stepped protrusion structure of the positioning protrusion also makes the positioning operation of the support member during installation more convenient.

[0010] Furthermore, the support member is an integrally formed fixed structure, and the support member is configured to keep the backrest and the back support relatively fixed. The support member has a simple and compact structure, is easy to install and disassemble, and has a low manufacturing cost.

[0011] Furthermore, the support member is an articulated structure, and the support member includes a first rotating part and a second rotating part, the first rotating part is configured to connect to the backrest, the second rotating part is configured to connect to the back support, and the first rotating part and the second rotating part are hinged via a rotating shaft, so that the first rotating part can rotate up and down relative to the second rotating part. The backrest can rotate up and down relative to the back support, so that the backrest can fit the user's back by adjusting the rotation angle, thereby providing a more stable support effect.

[0012] Furthermore, the support member is a hollow sleeve structure, and a connecting groove extending forward and backward in the horizontal direction is provided on the support member, and the support member is configured to be sleeved with a connecting rod on the back support and slide forward and backward relative to the back support, so that the backrest can be adjusted forward and backward relative to the back support, and further the user can adjust the front and rear position of the backrest according to the sitting depth when sitting on the seat, so that the user can maintain a correct and comfortable sitting posture.

[0013] Furthermore, a mounting portion is provided on the side wall of the support member, a avoidance hole is provided in the mounting portion, the avoidance hole is connected to the connecting groove, the mounting portion is configured to connect the adjustment switch, and the avoidance hole is configured to avoid the bayonet on the adjustment switch. The gear adjustment function between the support member and the connecting rod is realized by the bayonet and the bayonet slot on the connecting rod.

[0014] Furthermore, the support member may be a rod-shaped structure, and the support member includes a plug-in portion extending forward and backward in the horizontal direction, and the plug-in portion is configured to be plugged into a slot on the back support and slide forward and backward relative to the back support, so that the backrest can be adjusted by sliding forward and backward relative to the back support, and further the user can adjust the front and rear position of the backrest according to the sitting depth when sitting on the seat, so that the user can maintain a correct and comfortable sitting posture.

[0015] Furthermore, a plurality of gear holes are provided on the side wall of the plug part along the length direction, and the gear holes are configured to be engaged with the bayonet pins on the back bracket in sequence during the sliding process of the plug part to achieve gear adjustment. The gear adjustment function is achieved by engaging the gear holes with the bayonet pins on the back bracket.

[0016] The universal backrest mounting structure provided in the present application has reserved the same interface method on the back side of the backrest, that is, a positioning hole plus a side threaded hole, and positioning protrusions and threaded parts matching the backrest interface method are provided at the front ends of the support members of various structures, so that various different support members can be connected to the same backrest with positioning holes and threaded holes on the back side. The manufacturer only needs to produce one set of backrests to adapt to various types of support members, thereby greatly reducing the production and processing costs of the seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 A schematic diagram of the connection structure between the support member provided in the embodiment of the present application and the backrest when the support member is a fixed structure;

[0019] Figure 2 A schematic diagram of the back structure of a backrest provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the connection structure between the support member provided in the embodiment of the present application and the backrest when the support member is a hinged structure;

[0021] Figure 4 A schematic diagram of a three-dimensional structure when the support member provided in the embodiment of the present application is a hinged structure;

[0022] Figure 5A schematic diagram of the connection structure between the support member provided in the embodiment of the present application and the backrest when the support member is a sleeve structure;

[0023] Figure 6 A schematic diagram of a three-dimensional structure when the support member provided in the embodiment of the present application is a sleeve structure;

[0024] Figure 7 A schematic diagram of the connection structure between the support member provided in the embodiment of the present application and the backrest when the support member is a rod-shaped structure;

[0025] Figure 8 A schematic diagram of a three-dimensional structure when the support member provided in an embodiment of the present application is a rod-shaped structure;

[0026] Fig. 9 A schematic diagram of the three-dimensional structure of a seat provided in an embodiment of the present application.

[0027] The figures are marked as follows: 1-backrest, 110-positioning hole, 111-threaded hole, 2-support member, 210-positioning protrusion, 220-first rotating part, 221-second rotating part, 230-connecting groove, 231-installing part, 232-avoidance hole, 240-plug-in part, 241-gear hole, 250-threaded part, 251-connecting hole, 3-back bracket. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0029] Please refer to the attached Figure 1-9 The embodiment of the present application provides a universal backrest installation structure, including a backrest 1 and a support member 2, the support member 2 is detachably arranged on the backrest 1, the front end of the support member 2 is provided with a positioning protrusion 210, and the rear end of the backrest 1 is provided with a positioning hole 110 that is engaged with the positioning protrusion 210; the side wall of the support member 2 near the front end extends outward with a screw connection portion 250, and the screw connection portion 250 is provided with a connecting hole 251, and the rear end of the backrest 1 is provided with a threaded hole 111 near the positioning hole 110. When the positioning protrusion 210 is inserted into the positioning hole 110, the connecting hole 251 is aligned with the threaded hole 111 and the two are fixed by screws; no matter what function the support member 2 has, the front end of the support member 2 is always provided with a positioning protrusion 210 and a screw connection portion 250.

[0030] In this embodiment, by providing positioning protrusions 210 and threaded portions 250 at the front ends of support members 2 of various structures, various different support members 2 can be connected to the backrest 1 having positioning holes 110 and threaded holes 111 on the same back side. The manufacturer only needs to produce one set of backrests to adapt to various types of support members 2, and there is no need to separately make molds of the backrest 1 for different support members 1, thereby greatly reducing the production and processing costs of the seat.

[0031] Among them, the support member 2 is clamped on the backrest 1 through the positioning protrusion 210, and then threadedly fixed to the backrest 1 through the screw connection part 250, which not only facilitates the installation and disassembly operations between the support member 2 and the backrest 1, but also makes the connection strength between the two stronger.

[0032] Among them, screw connection parts 250 are extended from the left and right sides of the part of the support member 2 close to the positioning protrusion 210, and the connection between the support member 2 and the backrest 1 is stable and reliable through two-point fixation.

[0033] Preferably, the cross-sectional shape of the positioning protrusion 210 and the positioning hole 110 is a square, so that when the support member 2 is clamped on the backrest 1, it cannot rotate relative to the backrest 1, thereby preventing the position of the backrest 1 from being deflected after assembly due to the rotation of the support member 2 or the backrest 1 during installation. Of course, in other embodiments of the present application, the cross-sectional shape of the positioning protrusion 210 and the positioning hole 110 can also be a triangle, a pentagon, an ellipse, etc.

[0034] In some embodiments of the present application, the positioning hole 110 is a stepped countersunk hole, and the positioning protrusion 210 is a stepped protrusion opposite to the positioning hole 110 .

[0035] In this embodiment, by setting the positioning hole 110 as a countersunk hole, the connection strength between the support member 2 and the backrest 1 is further improved, and the stepped protrusion structure of the positioning protrusion 210 also makes the positioning operation of the support member 2 during installation more convenient.

[0036] In other embodiments of the present application, a hook may be provided on the side wall of the positioning protrusion 210 and a groove may be provided on the hole wall of the positioning hole 110. When the positioning protrusion 210 is engaged with the positioning hole 110, the hook is inserted into the groove, thereby achieving relative fixation of the support member 2 and the backrest 1 and making disassembly more convenient.

[0037] In some embodiments of the present application, the support member 2 only needs to be provided with a positioning protrusion 210 at the front end to achieve rapid positioning with the backrest 1, so that the support member 2 can be a structure with multiple different functions, for example: the support member 2 can be an integrally formed fixed structure, and the support member 2 is configured to keep the backrest 1 and the back support 3 relatively fixed. The support member 2 is a block structure with a simple and compact structure, which is easy to install and disassemble and has a low manufacturing cost.

[0038] In some embodiments of the present application, the support member 2 can also be an articulated structure, and the support member 2 includes a first rotating part 220 and a second rotating part 221. The first rotating part 220 is configured to connect to the backrest 1, and the second rotating part 221 is configured to connect to the back support 3. The first rotating part 220 and the second rotating part 221 are hinged by a rotating shaft, so that the first rotating part 220 can rotate up and down relative to the second rotating part 221.

[0039] In this embodiment, by setting the support member 2 as a hinged structure, the backrest 1 can be rotated up and down relative to the back support 3, so that the backrest 1 can fit the user's back by adjusting the rotation angle, thereby providing a more stable support effect.

[0040] Among them, a torsion spring is sleeved on the rotating shaft between the first rotating part 220 and the second rotating part 221. One side arm of the torsion spring acts on the first rotating part 220, and the other side arm of the torsion spring acts on the second rotating part 221. Not only can the backrest 1 be automatically reset by the elastic force of the torsion spring when it rotates, but also when the user's back presses the backrest 1, the backrest 1 can automatically rotate to a position that fits the user's back with the elastic force of the torsion spring and provide an elastic support effect, thereby making the seat have an automatic back-chasing function.

[0041] In some embodiments of the present application, the support member 2 is a hollow sleeve structure, and the support member 2 is provided with a connecting groove 230 extending forward and backward in the horizontal direction. The support member 2 is configured to be sleeved on the connecting rod on the back bracket 3 and slide forward and backward relative to the back bracket 3.

[0042] In this embodiment, by setting the support member 2 as a sleeve structure, the support member 2 can form a sliding structure with the connecting rod on the back support 3, so that the backrest 1 can be slid forward and backward relative to the back support 3, and then the user can adjust the front and rear position of the backrest 1 according to the sitting depth when sitting on the seat, so that the user can maintain a correct and comfortable sitting posture.

[0043] In some embodiments of the present application, a mounting portion 231 is provided on the side wall of the support member 2, and an avoidance hole 232 is opened in the mounting portion 231. The avoidance hole 232 is connected to the connecting groove 230. The mounting portion 231 is configured to connect the adjustment switch, and the avoidance hole 232 is configured to avoid the pin on the adjustment switch.

[0044] In this embodiment, a plurality of slots are provided on the connecting rod on the back bracket 3, the adjusting switch is hinged to the mounting portion 231, and the end of the adjusting switch away from the bayonet pin and the mounting portion 231 are connected by a spring. The spring pushes the adjusting switch and makes the bayonet pin always have a tendency to push into the slot on the connecting rod, thereby making the support member 2 and the connecting rod relatively fixed; by pressing the adjusting switch, the bayonet pin is disengaged from the slot, and the support member 2 can slide back and forth relative to the connecting rod again; thereby, the gear adjustment function between the support member 2 and the connecting rod is realized.

[0045] In some embodiments of the present application, the support member 2 can also be a rod-shaped structure, and the support member 2 includes a plug-in portion 240 extending forward and backward in the horizontal direction. The plug-in portion 240 is configured to be plugged into a slot on the back bracket 3 and slide forward and backward relative to the back bracket 3.

[0046] In this embodiment, by setting the support rod 2 as a rod-shaped structure and providing a front-to-back through-groove or sleeve on the back bracket 3, the plug-in portion 240 can form a sliding structure with the groove or sleeve on the back bracket 3, thereby driving the backrest 1 to be able to slide forward and backward relative to the back bracket 3, thereby allowing the user to adjust the front and back position of the backrest 1 according to the sitting depth when sitting on the seat, so that the user can maintain a correct and comfortable sitting posture.

[0047] In some embodiments of the present application, a plurality of gear holes 241 are provided on the side wall of the plug-in portion 240 along the length direction, and the gear holes 241 are configured to sequentially engage with the pins on the back bracket 3 during the sliding process of the plug-in portion 240 to achieve gear adjustment.

[0048] In this embodiment, by opening a gear hole 241 on the plug-in portion 240 and providing a bayonet on the slot or sleeve on the back bracket 3 to engage with the gear hole 241, relative fixation between the support member 2 and the back bracket 3 can be achieved; and by adjusting the bayonet to avoid the gear hole 241, the support member 2 can be allowed to slide forward and backward relative to the back bracket 3 again; thereby, the gear adjustment function between the support member 2 and the back bracket 3 is achieved.

[0049] Of course, in other embodiments of the present application, the support member 2 may also be various types of structures, such as a connecting rod structure, a screw rod structure, a pneumatic rod structure, and the like.

[0050] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means more than three.

[0051] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A universal backrest mounting structure, characterized in that: The invention comprises a backrest (1) and a support member (2), wherein the support member (2) is detachably arranged on the backrest (1), a positioning protrusion (210) is arranged at the front end of the support member (2), and a positioning hole (110) is provided at the rear end of the backrest (1) and is engaged with the positioning protrusion (210); a screw connection portion (250) is extended outward from a side wall of the support member (2) near the front end, and a connecting hole (251) is provided on the screw connection portion (250); a threaded hole (111) is provided at a portion of the rear end of the backrest (1) near the positioning hole (110); when the positioning protrusion (210) is engaged with the positioning hole (110), the connecting hole (251) is aligned with the threaded hole (111), so that the screw connection portion (250) and the backrest (1) are connected and fixed by screws.

2. The universal backrest mounting structure according to claim 1, characterized in that: The positioning hole (110) is a stepped countersunk hole, and the positioning protrusion (210) is a stepped protrusion opposite to the positioning hole (110).

3. The universal backrest mounting structure according to claim 1, characterized in that: The universal backrest mounting structure further comprises a back support (3); the support member (2) is an integrally formed fixed structure; the support member (2) is configured to connect the backrest (1) and the back support (3), so that the backrest (1) and the back support (3) remain relatively fixed.

4. The universal backrest mounting structure according to claim 1, characterized in that: The support member (2) is an articulated structure, comprising a first rotating portion (220) and a second rotating portion (221), wherein the first rotating portion (220) is configured to be connected to the backrest (1), and the second rotating portion (221) is configured to be connected to the back support (3), and the first rotating portion (220) and the second rotating portion (221) are hingedly connected via a rotating shaft, so that the first rotating portion (220) can rotate up and down relative to the second rotating portion (221).

5. The universal backrest mounting structure according to claim 1, characterized in that: The support member (2) is a hollow sleeve structure, the support member (2) is provided with a connecting groove (230) extending forward and backward in a horizontal direction, and the support member (2) is configured to be sleeved with a connecting rod on the back support (3) and slide forward and backward relative to the back support (3).

6. The universal backrest mounting structure according to claim 5, characterized in that: A mounting portion (231) is provided on the side wall of the support member (2), a relief hole (232) is provided in the mounting portion (231), the relief hole (232) is connected to the connection groove (230), the mounting portion (231) is configured to be connected to an adjustment switch, and the relief hole (232) is configured to avoid a latch on the adjustment switch.

7. The universal backrest mounting structure according to claim 1, characterized in that: The support member (2) may also be a rod-shaped structure, the support member (2) comprising an inserting portion (240) extending forward and backward in a horizontal direction, the inserting portion (240) being configured to be inserted into a slot on the back support (3) and to slide forward and backward relative to the back support (3).

8. The universal backrest mounting structure according to claim 7, characterized in that: A plurality of gear holes (241) are provided on the side wall of the plug-in portion (240) along the length direction, and the gear holes (241) are configured to sequentially engage with the bayonet pins on the back bracket (3) during the sliding process of the plug-in portion (240) to achieve gear adjustment.

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