Back support and seat

Abstract

The utility model provides a back support and a seat, the back support comprises a chair back connecting part and a transverse part used for being connected with a seat frame in a front-back sliding mode, the transverse part is connected with supporting arms which are symmetrical left and right on the chair back connecting part through screws, and due to the split type structural design, the transverse part can be connected with the seat frame in a sliding mode in advance; therefore, when the back support is applied to the seat, the chair back connecting part of the back support can be independently packaged and transported, and the transverse part can be slidably connected with the seat frame into a whole in advance and then packaged and transported, so that the volume and the cost for packaging and transporting the seat are saved; a user can mount the chair back connecting part on the transverse part only through simple screw assembly, so that the assembly of the chair is completed; the assembly difficulty of the seat is reduced, and the use experience of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a back support and a seat. Background Art

[0002] As a seat that accompanies children in their studies, learning seats play an important role in the process of children's growth and learning. Learning seats usually have the function of adjusting the seat depth, so that the seats can be suitable for children of different ages.

[0003] An existing learning chair adopts a front and rear sliding back bracket to adjust the distance between the chair back and the front edge of the seat, the seat includes a seat frame and a cushion installed on the seat frame, and the chair back includes a back support member and a back bracket used to connect with the back support member; the structural design of this chair is realized by symmetrical connecting parts extending from the left and right sides of the back bracket, the two connecting parts extend toward each other in the left and right directions and are inserted into the left and right sides of the seat frame, and are slidably connected inside the seat frame in the front and rear directions. When the seat depth needs to be adjusted, the front and rear sliding connecting parts can change the distance between the chair back and the front edge of the seat frame to achieve seat depth adjustment; but this structural design has shortcomings.

[0004] Before the seat leaves the factory, if the worker first inserts the corresponding connecting part into the seat for sliding connection assembly, and then installs the cushion, thereby assembling the back bracket and the seat into a whole, but the back bracket protrudes too much upward from the seat, the seat occupies too much volume, which will increase the transportation cost of the seat. Therefore, the back bracket and the seat frame need to be separated and packaged separately. Although the back bracket and seat frame that can be packaged for transportation saves transportation costs, when the user receives the seat, the back bracket and the seat frame are in a separated state. For the user, to install the back bracket on the seat again, the seat cushion needs to be removed from the seat frame again, and then slidingly connected. The operation is difficult and the installation process is cumbersome, which affects the user experience of the seat. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a back support, wherein the chair back connecting part and the horizontal part are split and can be disassembled and assembled by screws. This split structural design allows the horizontal part to be slidably connected to the seat frame in advance.

[0006] A seat is further provided, on which the back bracket is applied, wherein the backrest connecting portion of the back bracket can be packaged and transported separately, and the transverse portion can also be pre-slidably connected with the seat frame as a whole before being packaged and transported, thereby saving the volume and cost of seat packaging and transportation; and the user only needs to perform simple screw assembly to install the backrest connecting portion on the transverse portion to complete the assembly of the seat; thereby reducing the difficulty of assembling the seat and improving the user experience of the seat.

[0007] The technical solution of the utility model is achieved in this way:

[0008] A back support, comprising:

[0009] A seat back connection portion, the seat back connection portion having a support arm that is symmetrical left and right and extends forward and downward;

[0010] A transverse portion configured as a transition carrier for sliding connection between the support arm and the seat frame;

[0011] The back bracket has an assembled state and a disassembled state; when the back bracket is in the disassembled state, the transverse portion is separated from the corresponding support arm; when the back bracket is in the assembled state, one end of the transverse portion toward the support arm is connected to the extension end position of the corresponding support arm by a screw.

[0012] Preferably, the end of the support arm facing the transverse part has a first docking surface, and the end of the transverse part facing the support arm has a second docking surface. The first docking surface is provided with a screw hole, and the second docking surface is provided with a through hole. The screw passes through the through hole and is screwed into the screw hole to connect the support arm with the transverse part.

[0013] Preferably, at least one locating pin perpendicular to the first docking surface is provided on the first docking surface, and the second docking surface is provided with a pin hole corresponding to the position of the locating pin. When the transverse part and the support arm are connected by screws, the locating pin is inserted into the pin hole. The locating pin and pin hole design can play a positioning role when the transverse part is connected to the support arm, so that the through hole and the screw hole can be quickly aligned, thereby improving assembly efficiency.

[0014] Preferably, the first docking surface and the second docking surface are both horizontal surfaces; the design of the horizontal surface allows the two docking surfaces to be quickly docked, making it easier for workers to operate and assemble, thereby improving assembly efficiency.

[0015] Preferably, a positioning notch is provided at one end of the transverse portion facing the support arm, and a corresponding positioning block is provided at one end of the support arm facing the transverse portion. When the transverse portion and the support arm are connected by screws, the positioning block is inserted into the positioning notch. The design of the positioning block and the positioning notch can serve as a positioning mark in appearance, so that the through hole and the screw hole can be quickly aligned, further improving assembly efficiency.

[0016] Preferably, one end of the transverse portion facing the support arm is provided with a countersunk hole which is concentric with the through hole and is used to accommodate the head of the screw, so as to hide the connection trace of the screw on the back bracket.

[0017] A seat, comprising:

[0018] The back support;

[0019] The seat frame has sliding avoidance grooves on the left and right sides of the seat frame, which are through-through and extend in the front-back direction;

[0020] One end of the transverse part is pre-inserted into the sliding avoidance groove and then slidably connected in the seat frame along the front-rear direction, so that the transverse part and the seat frame are connected as an integral seat frame assembly; the other end of the transverse part is exposed outside the seat frame;

[0021] The seat has a disassembled state and an assembled state; when the seat is in the disassembled state, the seat back connection part on the back support is separated from the seat frame assembly; when the seat is in the assembled state, the two arms on the seat back connection part are connected to the end of the corresponding transverse part exposed from the seat frame by screws, so that the back support and the seat frame are slidably connected in the front-rear direction.

[0022] Preferably, inside the seat frame, the two transverse parts are inserted into one end of the seat frame, extend toward each other and are connected as a whole; so that the two transverse parts on the left and right sides of the seat frame can slide synchronously; and the two transverse parts connected as one can be assembled into place in the seat frame at one time, thereby improving the assembly efficiency of the seat frame and the transverse parts.

[0023] Preferably, the bottom of the seat frame is symmetrically provided with sliding grooves along the left-right direction, and the sliding grooves extend along the front-to-back direction. One end of the transverse part inserted into the seat frame is provided with at least two plug posts spaced along the front-to-back direction. The plug posts pass downward through the sliding grooves, and one end of the plug posts passing through the sliding grooves is connected with a limiting screw, so that the transverse part is slidably connected with the seat frame along the front-to-back direction.

[0024] The utility model provides a back support and a seat, which have the following beneficial effects compared with the prior art:

[0025] The split structural design of the back support provides a basic structure for the separate packaging of the seat frame and the back support, so that the transverse part of the back support can be combined with the seat frame assembly that is pre-connected with the seat frame, and the seat frame assembly can be packaged and transported with the backrest connecting part of the back support, saving the seat transportation volume and cost; after the user receives the seat, there is no need to remove the seat cushion from the seat frame, and the seat can be assembled by only screwing the backrest connecting part to the transverse part exposed on the seat frame. The operation is simple and convenient, which improves the user experience of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the structure of the back support;

[0027] Figure 2 This is an enlarged view of the countersunk hole on the transverse part after the back bracket is assembled;

[0028] Figure 3 This is an enlarged view of the structure of the support arm;

[0029] Figure 4 It is a schematic diagram of the structure pre-installed in the seat frame in the transverse part;

[0030] Figure 5 is a cross-sectional view of the lateral portion in the sliding connection position within the seat frame;

[0031] Figure 6 is a cross-sectional view of the control assembly between the transverse portion and the seat frame;

[0032] Figure 7 An exploded view of the control assembly;

[0033] Figure 8 A schematic diagram of the structure in which the back support is completely assembled on the seat frame assembly;

[0034] The figures are marked as follows: 1-backrest connecting part, 2-support arm, 3-transverse part, 4-seat frame, 5-limiting screw, 6-seat cushion, 7-positioning control assembly, 21-positioning pin, 22-screw hole, 23-positioning block, 24-first docking surface, 31-pin hole, 32-through hole, 33-positioning notch, 34-second docking surface, 35-countersunk hole, 36-slide rod, 37-vertical plate, 41-sliding avoidance groove, 42-gear tooth, 43-slide groove, 71-handle, 72-pull rod, 73-spring, 74-accommodating groove, 75-card groove, 76-vertical plate. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0038] The specific implementation of the utility model is as follows:

[0039] like Figure 1-8 As shown, the utility model provides a back support, comprising:

[0040] A back support, comprising:

[0041] The backrest connecting part 1 has a support arm 2 which is symmetrical and extends forward and downward, so that the entire backrest connecting part 1 has a U-shaped structure in appearance;

[0042] The transverse portion 3 is configured as a transition carrier for sliding connection between the support arm 2 and the seat frame 4;

[0043] The back bracket has an assembled state and a disassembled state; when the back bracket is in the disassembled state, the transverse portion 3 is separated from the corresponding support arm 2; when the back bracket is in the assembled state, one end of the transverse portion 3 facing the support arm 2 is connected to the extension end position of the corresponding support arm 2 by screws.

[0044] Furthermore, the support arm 2 and the transverse portion 3 are connected in the assembled state as follows: the end of the support arm 2 facing the transverse portion 3 has a first docking surface 24, and the end of the transverse portion 3 facing the support arm 2 has a second docking surface 34, a screw hole 22 is provided on the first docking surface 24, and a through hole 32 is provided on the second docking surface 34, and the screw passes through the through hole 32 and is screwed into the screw hole 22 to connect the support arm 2 and the transverse portion 3.

[0045] Furthermore, in order to enable the screws to be quickly aligned with the corresponding installation holes, at least one positioning pin 21 perpendicular to the first docking surface 24 is provided on the first docking surface 24, and the second docking surface 34 is provided with a pin hole 31 corresponding to the position of the positioning pin 21. When the transverse portion 3 and the support arm 2 are connected by screws, the positioning pin 21 is inserted into the pin hole 31; the design of the positioning pin 21 and the pin hole 31 can play a positioning role when the transverse portion 3 is connected to the support arm 2, so that the through hole 32 and the screw hole 22 are quickly aligned, thereby improving assembly efficiency.

[0046] Furthermore, in order to facilitate workers' assembly, the first docking surface 24 and the second docking surface 34 are both horizontal planes; compared with the design of setting the two docking surfaces to be inclined, the horizontal plane design can enable the two docking surfaces to be quickly docked, which is convenient for workers to operate and assemble, thereby improving assembly efficiency.

[0047] Furthermore, in order to further improve the assembly efficiency, a positioning notch 33 is provided at one end of the transverse portion 3 facing the support arm 2, and a corresponding positioning block 23 is provided at one end of the support arm 2 facing the transverse portion 3. When the transverse portion 3 and the support arm 2 are connected by screws, the positioning block 23 is inserted into the positioning notch 33; under the premise that the positioning pin 21 and the pin hole 31 cooperate to form a single positioning fit, the design of the positioning block 23 and the positioning notch 33 can serve as a positioning mark in appearance, so that the through hole 32 is aligned with the screw hole 22 and a second positioning fit is formed.

[0048] Furthermore, a countersunk hole 34 is provided at one end of the transverse portion 3 facing the support arm 2 and is concentric with the through hole 32 and is used to accommodate the head of the screw, so as to hide the connection trace of the screw on the back bracket.

[0049] A seat is provided, comprising:

[0050] The back support;

[0051] The seat frame 4 has a sliding avoidance groove 41 extending in the front-rear direction on both sides of the seat frame 4. A seat cushion 5 is usually installed on the seat frame 4.

[0052] One end of the transverse portion 3 is pre-inserted into the sliding avoidance groove 41 and then slidably connected to the seat frame 4 along the front-rear direction, so that the transverse portion 3 and the seat frame 4 are connected as an integrated seat frame assembly; the other end of the transverse portion 3 is exposed outside the seat frame 4;

[0053] The seat has a disassembled state and an assembled state; when the seat is in the disassembled state, the backrest connecting part 1 on the back support is separated from the seat frame assembly; at this time, the seat frame assembly connected as one can be packaged separately, and the backrest connecting part 1 on the back support can also be packaged separately; when the seat is in the assembled state, the two arms 2 on the backrest connecting part 1 are connected to the end of the corresponding transverse part 3 exposed from the seat frame 4 by screws, so that the back support and the seat frame 4 are slidably connected in the front and rear directions; there is no need to remove the seat cushion 5 on the seat frame 4 to complete the sliding connection between the back support and the seat frame 4.

[0054] Furthermore, one end of the transverse portion 3 located inside the seat frame 4 is slidably connected to the seat frame 4 in this way: a slide groove 43 is symmetrically provided at the bottom of the seat frame 4 along the left-right direction, and the slide groove 43 extends along the front-to-back direction. One end of the transverse portion 3 inserted into the seat frame 4 is provided with at least two plug posts 36 spaced apart along the front-to-back direction. The plug posts 36 pass downward through the slide groove 43, and one end of the plug posts 36 passing through the slide groove 43 is connected to a limiting screw 5, so that the transverse portion 3 is slidably connected to the seat frame 4 along the front-to-back direction.

[0055] Furthermore, inside the seat frame 4, the two transverse parts 3 are inserted into one end of the seat frame 4 and extend toward each other and are connected as a whole; the two transverse parts 3 on the left and right sides of the seat frame 4 can slide synchronously; and the two transverse parts 3 connected as one can be assembled in place in the seat frame 4 at one time, which improves the assembly efficiency of the seat frame 4 and the transverse parts 3; specifically, if the two transverse parts 3 are not connected as one, it is necessary to first take out a transverse part 3 during assembly, and then place the plug column 36 on the transverse part 3 in the slide groove 43, and then install the limit screw 5; after the installation is completed, take out the next transverse part 3 for installation, and repeat the above steps; and the two transverse parts 3 connected as one only need to be taken out once, and then the plug columns 36 on the two transverse parts 3 are placed in the corresponding slide groove 43, and then the limit screw 5 is installed in place at one time; it is not difficult to see that the design of connecting the two transverse parts 3 as one kills two birds with one stone, and the design is ingenious.

[0056] The back support 72 is provided with a handle 71 which is connected to the seat frame 4, and a slot 75 is provided at the inner end of the pull rod 72. A plurality of gear teeth 42 are evenly distributed front and rear, and one of the gear teeth 42 is stuck in the slot 75. Pulling the handle 71 can separate the gear teeth 42 from the slot 75. At this time, the locking is released and the back support can slide back and forth. Release the handle 71 to reset the pull rod 72. At this time, the corresponding gear tooth 42 cooperates with the slot 75 to switch the back support to the positioning state.

[0057] Furthermore, the elastic reset of the pull rod 72 is achieved as follows: a accommodating groove 74 is provided on the body of the pull rod 72, and a vertical plate 76 is provided at one end of the accommodating groove 74, and a vertical plate 37 is provided at the bottom of the transverse portion 3, and the vertical plate 37 is inserted into the other end of the accommodating groove 74. A spring 73 is provided in the accommodating groove 74, and one end of the spring 73 presses against the vertical plate 76, and the other end presses against the vertical plate 37, thereby providing an elastic reset force for the pull rod 72; the rest of the specific structure can refer to the seat depth adjustment control mechanism patent with application number 2024211156135, which will not be repeated here.

[0058] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A back support, characterized in that it comprises: A seat back connection portion (1), the seat back connection portion (1) having a support arm (2) which is symmetrical with respect to the left and right and extends forward and downward; A transverse portion (3) configured as a transition carrier for sliding connection between the support arm (2) and the seat frame (4); The back bracket has an assembled state and a disassembled state; when the back bracket is in the disassembled state, the transverse portion (3) is separated from the corresponding support arm (2); when the back bracket is in the assembled state, one end of the transverse portion (3) facing the support arm (2) is connected to the extension end position of the corresponding support arm (2) by means of screws.

2. A back support according to claim 1, characterized in that: One end of the support arm (2) facing the transverse portion (3) has a first butt joint surface (24), and one end of the transverse portion (3) facing the support arm (2) has a second butt joint surface (34). The first butt joint surface (24) is provided with a screw hole (22), and the second butt joint surface (34) is provided with a through hole (32). The screw passes through the through hole (32) and is screwed into the screw hole (22), so that the support arm (2) is connected to the transverse portion (3).

3. A back support according to claim 2, characterized in that: The first docking surface (24) is provided with at least one positioning pin (21) perpendicular to the first docking surface (24), the second docking surface (34) is provided with a pin hole (31) corresponding to the position of the positioning pin (21), and when the transverse portion (3) and the support arm (2) are connected by screws, the positioning pin (21) is inserted into the pin hole (31).

4. A back support according to claim 2, characterized in that: The first butt joint surface (24) and the second butt joint surface (34) are both horizontal surfaces.

5. A back support according to claim 1, characterized in that: One end of the transverse portion (3) facing the support arm (2) is provided with a positioning notch (33), and one end of the support arm (2) facing the transverse portion (3) is provided with a corresponding positioning block (23); when the transverse portion (3) and the support arm (2) are connected by screws, the positioning block (23) is inserted into the positioning notch (33).

6. A back support according to claim 1, characterized in that: One end of the transverse portion (3) facing the support arm (2) is provided with a countersunk hole (35) which is concentric with the through hole (32) and is used to accommodate a screw head.

7. A seat, characterized in that it comprises: The back support as claimed in claim 1; A seat frame (4), wherein left and right sides of the seat frame (4) are provided with sliding avoidance grooves (41) which penetrate the left and right sides and extend in the front-rear direction; One end of the transverse portion (3) is pre-inserted into the sliding avoidance groove (41) and then slidably connected to the seat frame (4) along the front-rear direction, so that the transverse portion (3) and the seat frame (4) are connected to form an integrated seat frame assembly; the other end of the transverse portion (3) is exposed outside the seat frame (4); The seat has a disassembled state and an assembled state; when the seat is in the disassembled state, the backrest connecting portion (1) on the back support is separated from the seat frame assembly; when the seat is in the assembled state, two support arms (2) on the backrest connecting portion (1) are connected to one end of the corresponding transverse portion (3) exposed from the seat frame (4) by screws, so that the back support and the seat frame (4) are connected by sliding in the front-rear direction.

8. A seat according to claim 7, characterized in that: Inside the seat frame (4), one end of the two transverse parts (3) inserted into the seat frame (4) extends towards each other and is connected as a whole.

9. A seat according to claim 7, characterized in that: The bottom of the seat frame (4) is symmetrically provided with a slide groove (43) along the left-right direction, and the slide groove (43) extends along the front-back direction. One end of the transverse portion (3) inserted into the seat frame (4) is provided with at least two insertion columns (36) spaced apart along the front-back direction. The insertion column (36) passes downward through the slide groove (43), and one end of the insertion column (36) passing through the slide groove (43) is connected to a limiting screw (5), so that the transverse portion (3) and the seat frame (4) are slidably connected along the front-back direction.

Images