A multi-functional bracket mechanism and a seat

Abstract

The present invention relates to a multi-functional bracket mechanism and a seat, including a seat frame, a leg bracket, a backrest frame, and an armrest frame. The leg bracket is installed at one end of the seat frame by means of hinge connection, and the backrest frame is installed at the other end of the seat frame by means of hinge connection. A telescopic bracket is installed on the seat frame, and the telescopic bracket is movably connected to a connecting plate installed on a support. The telescopic bracket includes a first link assembly and a second link assembly. The first link assembly and the second link assembly are hinged to each other. Among them, the first link assembly is hinged to the backrest frame, and the second link assembly is connected to the leg bracket, so as to realize the linkage of the seat frame, the leg bracket, and the backrest frame through the telescopic bracket. The beneficial effects of the present invention are as follows: By arranging a telescopic bracket among the seat frame, the leg bracket, and the backrest frame, and arranging a locking mechanism on the armrest frame, the forward and backward rotation of the backrest frame drives the forward and backward linkage of the seat frame and the leg bracket, so as to achieve the purpose of adjusting any pose and play a self-locking role.

Description

Technical Field

[0001] The present invention belongs to the technical field of seat brackets, and particularly relates to a multifunctional bracket mechanism and a seat. Background Art

[0002] With the continuous improvement of people's living standards, there are a variety of seats, and movable seats are very popular among people. For example: folding reclining chairs, multifunctional sofa chairs, etc. However, the adjustment bracket in the movable seat is the core of the whole seat. Therefore, the quality of the design of the movable seat is generally determined by the adjustment bracket. The adjustment method can be electric drive adjustment or manual adjustment. Most of the manually adjusted movable seats use an adjustment bracket with a fully mechanical structure, which has a relatively low cost compared to electric drive adjustment, and can achieve sitting and lying postures in multiple positions, with rich functions and good market promotion prospects. However, due to the reason of the structural design of the existing manual adjustment bracket, during the process of adjusting the seat, the operation is relatively complicated. Especially during the backward tilt of the seat, it is not easy to control, which may lead to unstable center of gravity and safety problems. Moreover, the footrest does not extend forward as the seat tilts backward, so that when a tall person lies on the seat, their feet are mostly outside the footrest, affecting the comfort. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies existing in the prior art, and provide a multifunctional bracket mechanism and a seat with simple and novel structure, good safety, good comfort, and locking and opening in any position.

[0004] The purpose of the present invention is achieved by the following technical solutions. This multifunctional bracket mechanism includes a seat frame, a leg support bracket, a backrest frame, and an armrest frame. The leg support bracket is installed at one end of the seat frame by a hinged manner, the backrest frame is installed at the other end of the seat frame by a hinged manner. A telescopic bracket is installed on the seat frame, and the telescopic bracket is movably connected to a connecting plate installed on a support. The telescopic bracket includes a first link assembly and a second link assembly. The first link assembly and the second link assembly are hinged to each other, wherein the first link assembly is hinged to the backrest frame, and the second link assembly is connected to the leg support bracket, so as to realize the linkage of the seat frame, the leg support bracket, and the backrest frame through the telescopic bracket. The armrest frame includes an outer armrest member and an inner armrest member. The outer armrest member is connected to an armrest support seat, and the armrest support seat is installed on the support. The inner armrest member is hinged to the backrest frame, and a locking mechanism is installed between the inner armrest member and the outer armrest member, and the one-way limiting movement of the backrest frame is realized through the locking mechanism.

[0005] Preferably, the first link assembly includes a first link, a second link, and a third link. One end of the first link is hinged to the backrest frame. The main body of the first link is hinged to one end of the second link. The other end of the second link is hinged to one end of the third link. The third link is hinged to the connecting plate.

[0006] Preferably, a vertical chute is provided on the connecting plate, and a first limit pin provided on the third link is engaged with the vertical chute. A second limit pin is provided on the first link, and the second limit pin abuts against one end of the main body of the second link.

[0007] Preferably, an automatic reset mechanism is installed between the first link and the seat frame. The automatic reset mechanism includes a limit block, a limit pin shaft, and a spring. The limit block is installed on the seat frame. One end of the spring is connected to the limit block, and the other end of the spring is connected to the first link. A transverse chute is provided on the limit block, and the limit pin shaft is located in the transverse chute.

[0008] Preferably, the second link assembly includes a fourth link and a connecting block. One end of the fourth link is hinged to the other end of the first link. The other end of the fourth link is inserted into the connecting block, and the connecting block is installed on the leg support. The main body of the fourth link is hinged to the other end of the third link.

[0009] Preferably, the hinge point between the fourth link and the third connecting rod is located on the fourth link. A third limit pin is provided on the fourth link, and a limit groove is provided on the first link that cooperates with the third limit pin.

[0010] Preferably, the outer armrest member includes a first outer armrest member and a second outer armrest member. The first outer armrest member is connected to the armrest support seat. The second outer armrest member is inserted through the inner armrest member, and the locking mechanism is installed between the first outer armrest member and the second outer armrest member.

[0011] Preferably, the locking mechanism includes a second connection assembly connected to the second outer armrest member and a first connection assembly connected to the first outer armrest. The first connection assembly includes a first outer ring and a first inner ring. The second connection assembly includes a second outer ring and a second inner ring. A sliding rod provided on the inner armrest slides through the first inner ring and the second inner ring. A buffer ring, a washer, and an elastic locking piece are sequentially installed in the first inner ring and abutted against the second inner ring through the first inner ring. An elastic washer is installed outside the second inner ring and abutted against the second outer ring through the first outer ring.

[0012] Preferably, the elastic locking plate is a barbed structure, one end of the second inner ring is conical and limited within one end of the first outer ring, and the second inner ring at the conical end is pushed forward by the second outer armrest to resist and stretch the elastic locking plate.

[0013] A chair comprises a base and the multifunctional bracket mechanism as described above, wherein the multifunctional bracket mechanism is installed on the base via a support.

[0014] The beneficial effects of the present invention are as follows: a telescopic bracket is arranged between the seat frame, the leg support and the backrest frame, and the seat frame and the leg support are driven to move forward and backward by the forward and backward rotation of the backrest frame. At the same time, a locking mechanism is arranged on the armrest frame, so that the backrest frame can play a self-locking role when lying backward, and can prevent the backrest frame from tilting excessively when lying backward and causing the risk of tipping over; the purpose of adjusting any posture can be achieved by combining the locking mechanism with the telescopic bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the multifunctional bracket mechanism of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the seat frame, the leg support frame, the backrest frame and the telescopic bracket of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the seat of the present invention in a lying position.

[0018] Figure 4 It is a structural schematic diagram of the chair sitting posture state of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure between the fourth connecting rod and the third limiting pin of the present invention.

[0020] Figure 6 It is a schematic diagram of the structure between the locking mechanism and the inner and outer armrest members of the present invention.

[0021] Figure 7 It is a schematic diagram of the structure of the elastic locking piece of the present invention.

[0022] Figure 8 yes Figure 6 A is an enlarged structural diagram of FIG.

[0023] The reference numerals in the drawings are respectively: 1, seat frame; 2, leg bracket; 3, backrest frame; 4, armrest frame; 5, telescopic bracket; 6, support; 7, connecting plate; 8, locking mechanism; 9, automatic reset mechanism; 10, base; 41, outer armrest member; 42, inner armrest member; 43, armrest support seat; 41-1, first outer armrest member; 41-2, second outer armrest member; 42-1, sliding rod; 51, first link assembly; 52, second link assembly; 51-1, first link; 51-2, second link; 51-3, third link; 51-4, first limit pin; 51-5, second limit pin; 52-1, fourth link; 52-2, connecting block; 52-3, third limit pin; 52-4, limit groove; 71, vertical chute; 81, second connection assembly; 82, first connection assembly; 83, elastic locking piece; 84, washer; 85, buffer ring; 86, elastic washer; 81-1, second outer ring; 81-2, second inner ring; 81-3, groove; 82-1, first outer ring; 82-2, first inner ring; 91, limit block; 92, limit pin shaft; 93, spring; 91-1, horizontal chute. Detailed implementation mode

[0024] The following will introduce the present invention in detail with reference to the drawings: As shown in the attached Figure 1 , 2 figures, the present invention includes a seat frame 1, a leg bracket 2, a backrest frame 3, and an armrest frame 4. The leg bracket 2 is installed at one end of the seat frame 1 by means of hinge, the backrest frame 3 is installed at the other end of the seat frame 1 by means of hinge, a telescopic bracket 5 is installed on the seat frame 1, and the telescopic bracket 5 is movably connected to the connecting plate 7 installed on the support 6; the telescopic bracket 5 includes a first link assembly 51 and a second link assembly 52, the first link assembly 51 and the second link assembly 52 are hinged to each other, wherein the first link assembly 51 is hinged to the backrest frame 3, and the second link assembly 52 is connected to the leg bracket 2, so as to realize the linkage of the seat frame 1, the leg bracket 2, and the backrest frame 3 through the telescopic bracket 5; the armrest frame 4 includes an outer armrest member 41 and an inner armrest member 42, the outer armrest member 41 is connected to the armrest support seat 43, the armrest support seat 43 is installed on the support 6, the inner armrest member 42 is hinged to the backrest frame 3, and a locking mechanism 8 is installed between the inner armrest member 42 and the outer armrest member 41, and the one-way limit movement of the backrest frame 3 is realized through the locking mechanism 8. When the backrest frame 3 moves backward, a certain position of the backrest can be locked through the locking mechanism 8; by arranging a telescopic bracket among the seat frame, the leg bracket, and the backrest frame, the front and back linkage of the seat frame and the leg bracket is driven by the forward and backward rotation of the backrest frame. At the same time, a locking mechanism is arranged on the armrest frame, so that when the backrest frame lies backward, it plays a role of self-locking, and can prevent the backrest frame from tilting too much when lying backward and causing a tipping danger; through the combination of the locking mechanism and the telescopic bracket, the purpose of adjusting any posture is achieved.

[0025] The first link assembly 51 includes a first link 51-1, a second link 51-2, and a third link 51-3. One end of the first link 51-1 is hinged to the backrest frame 3, the main body of the first link 51-1 is hinged to one end of the second link 51-2, the other end of the second link 51-2 is hinged to one end of the third link 51-3, and the third link 51-3 is hinged to the connecting plate 7; this enables the linkage between the backrest frame 3 and the seat frame 1.

[0026] A vertical chute 71 is provided on the connecting plate 7, and a first limit pin 51-4 provided on the third link 51-3 is engaged with the vertical chute 71; a second limit pin 51-5 is provided on the first link 51-1, and the second limit pin 51-5 abuts against one end of the main body of the second link 51-2; this can play a role in limiting the backrest frame 3 during the forward and backward rotation process, and together with the locking mechanism, it provides double limit protection, greatly improving the safety performance. For example, as shown in the attached Figure 3 As shown, when the seat is in the reclined state, at this time, the first limit pin 51-4 is located at the topmost end of the vertical chute 71, and the second limit pin 51-5 abuts against one end of the main body of the second link 51-2; as shown in the attached Figure 4 As shown, when the seat is in the sitting state, at this time, the first limit pin 51-4 is located at the bottommost end of the vertical chute 71, and the second limit pin 51-5 does not abut against one end of the main body of the second link 51-2.

[0027] An automatic reset mechanism 9 is installed between the first link 51-1 and the seat frame 1. The automatic reset mechanism 9 includes a limit block 91, a limit pin shaft 92, and a spring 93. The limit block 91 is installed on the seat frame 1, one end of the spring 93 is connected to the limit block 91, the other end of the spring 93 is connected to the first link 51-1, a horizontal chute 91-1 is provided on the limit block 91, and the limit pin shaft 92 is located in the horizontal chute 91-1. When the seat is in use, under the action of the human body gravity and the thrust of the hand, the spring 93 is in the extended state. When a person gets up, the backrest frame 3 is automatically reset by the combined action of the spring 93 and the sliding of the limit pin shaft 92. For example, when the seat is in the reclined state, at this time, the spring 93 is in the extended state, and the limit pin shaft 92 is located at the rearmost end of the horizontal chute 91-1; when the seat is in the sitting state, at this time, the spring 93 is in the contracted state, and the limit pin shaft 92 is located at the foremost end of the horizontal chute 91-1.

[0028] The second link assembly 52 includes a fourth link 52-1 and a connecting block 52-2. One end of the fourth link 52-1 is hinged to the other end of the first link 51-1, the other end of the fourth link 52-1 is inserted into the connecting block 52-2, and the connecting block 52-2 is installed on the leg support 2. The main body of the fourth link 52-1 is hinged to the other end of the third link 51-3; this enables the linkage between the seat frame 1 and the leg support 2.

[0029] The hinge point of the fourth connecting rod 52-1 and the third connecting rod 51-3 is located at the corner of the fourth connecting rod 52-1, which facilitates the linkage of the leg bracket 2 and the seat frame 1, so that the center of gravity of the seat is more stable when it is in a lying state; Figure 5 As shown, the fourth connecting rod 52-1 is provided with a third limiting pin 52-3, and the first connecting rod 51-1 matched with the third limiting pin 52-3 is provided with a limiting groove 52-4, which plays a limiting role between the leg support 2 and the seat frame 1 when the chair is in a sitting state and prevents the leg support 2 from excessive rotation.

[0030] The outer armrest member 41 includes a first outer armrest member 41-1 and a second outer armrest member 41-2. The first outer armrest member 41-1 is connected to the armrest support seat 43, the second outer armrest member 41-2 is interlaced with the inner armrest member 42, and the locking mechanism 8 is installed between the first outer armrest member 41-1 and the second outer armrest member 41-2; by pushing the second outer armrest member 41-2 forward and through the locking mechanism 8, the inner armrest member 42 can be moved forward and backward or locked; when in use, the second outer armrest member is gently pushed forward, and the inner armrest member 42 and the backrest frame 3 can move forward and backward, and the hand releases the thrust, and the inner armrest member 42 is locked by the locking mechanism 8, so that the seat can be positioned at any position according to the user's intention.

[0031] As attached Figure 6 As shown, the locking mechanism 8 includes a second connecting component 81 connected to the second outer handrail member 41-2, and a first connecting component 82 connected to the first outer handrail member 41-1. The first connecting component 82 includes a first outer ring 82-1 and a first inner ring 82-2. The first outer ring 82-1, the first inner ring 82-2 and the first outer handrail member 41-1 are connected and fixed by screws. The second connecting component 81 includes a second outer ring 81-1 and a second inner ring 81-2. The second outer ring 81-1, the second inner ring 81-2 and the second outer handrail member 41-2 are connected and fixed by screws. The sliding rod 42-1 provided in the inner armrest member 42 is slidably inserted in the first inner ring 82-2 and the second inner ring 81-2, and the outer surface of the sliding rod 42-1 is a rough surface, which can increase the gripping force with the elastic locking piece 83 when locking. The groove provided at one end of the first inner ring 82-2 is sequentially installed with a buffer ring 85, a washer 84, and an elastic locking piece 83, and the first inner ring 82-2 and the second inner ring 81-2 are abutted, and the washer 84 is embedded in the buffer ring 85; the purpose of setting the buffer ring 85 and the washer 84 is to obtain a buffering force when the elastic locking piece 83 is positioned and pushed, as shown in the attached Figure 8As shown in the figure, at the position of the limiting elastic locking piece 83; the inner walls of the buffer ring 85 and the washer 84 are both tapered, so that they can better fit with the second inner ring 81-2 with a tapered end. And a groove 81-3 adapted to the end face of the washer 84 is provided at the end face of the second inner ring 81-2 with a tapered end. This can facilitate the full expansion of the elastic locking piece 83 when the second inner ring 81-2 is pushed forward; an elastic washer 86 is installed outside the second inner ring 81-2 and abuts against the first outer ring 82-1 and the second outer ring 81-1, as shown in the appendix Figure 7 As shown in the figure, the elastic locking piece 83 has a barbed structure. One end of the second inner ring 81-2 is tapered and limited inside one end of the first outer ring 82-1. And the second inner ring 81-2 with a tapered end abuts against the elastic locking piece 83 and expands the elastic locking piece 83 by the forward push of the second outer armrest member 41-2; during use, the second outer armrest member is gently pushed forward, driving the second outer ring 81-1 and the second inner ring 81-2 to also move forward. Thus, the second inner ring 81-2 abuts against the elastic locking piece 83 and expands the elastic locking piece 83, and the inner armrest member 42 and the backrest frame 3 can move back and forth. When the hand releases the thrust, the second inner ring 81-2 abuts against the elastic locking piece 83, and the sliding rod 42-1 of the inner armrest member 42 is locked by the elastic locking piece 83. In this way, the seat can be positioned at any position according to the user's intention. At the same time, when the seat is in a lying position, at this time, under the combined action of the locking mechanism 8, the limit pin shaft 92, the first limit pin 51-4, and the second limit pin 51-5, the rotation range of the backrest frame 3 can be limited, thereby ensuring the safety problem caused by the seat not tipping backward.

[0032] A seat includes a base 10 and a multi-functional bracket mechanism. The multi-functional bracket mechanism is installed on the base 10 through a support 6. The base 10 can be a rotating bracket or a fixed support bracket.

[0033] The present invention is not limited to the above embodiments. No matter what changes are made in its shape or material composition, as long as the structural design provided by the present invention is adopted, it is a deformation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. A multi-functional support mechanism, comprising a seat frame (1), a leg support (2), a backrest frame (3), and an armrest frame (4). The leg support (2) is installed at one end of the seat frame (1) by means of hinge, and the backrest frame (3) is installed at the other end of the seat frame (1) by means of hinge. It is characterized in that: A telescopic support (5) is installed on the seat frame (1), and the telescopic support (5) is movably connected to a connecting plate (7) installed on a support (6); the telescopic support (5) comprises a first link assembly (51) and a second link assembly (52), the first link assembly (51) and the second link assembly (52) are hinged to each other, wherein the first link assembly (51) is hinged to the backrest frame (3), and the second link assembly (52) is connected to the leg support (2), so as to realize the linkage of the seat frame (1), the leg support (2), and the backrest frame (3) through the telescopic support (5); the armrest frame (4) comprises an outer armrest member (41) and an inner armrest member (42), the outer armrest member (41) is connected to an armrest support seat (43), the armrest support seat (43) is installed on the support (6), the inner armrest member (42) is hinged to the backrest frame (3), and a locking mechanism (8) is installed between the inner armrest member (42) and the outer armrest member (41), and the one-way limit movement of the backrest frame (3) is realized through the locking mechanism (8); the first link assembly (51) comprises a first link (51-1), a second link (51-2), and a third link (51-3), one end of the first link (51-1) is hinged to the backrest frame (3), the main body of the first link (51-1) is hinged to one end of the second link (51-2), the other end of the second link (51-2) is hinged to one end of the third link (51-3), and the third link (51-3) is hinged to the connecting plate (7); a vertical chute (71) is provided on the connecting plate (7), and a first limit pin (51-4) provided on the third link (51-3) is matched with the vertical chute (71); a second limit pin (51-5) is provided on the first link (51-1), and the second limit pin (51-5) abuts against one end of the main body of the second link (51-2); an automatic reset mechanism (9) is installed between the first link (51-1) and the seat frame (1), the automatic reset mechanism (9) comprises a limit block (91), a limit pin shaft (92), and a spring (93), the limit block (91) is installed on the seat frame (1), one end of the spring (93) is connected to the limit block (91), the other end of the spring (93) is connected to the first link (51-1), a horizontal chute (91-1) is provided on the limit block (91), and the limit pin shaft (92) is located in the horizontal chute (91-1).

2. The multi-functional support mechanism according to claim 1, It is characterized in that: The second connecting rod assembly (52) comprises a fourth connecting rod (52-1) and a connecting block (52-2); one end of the fourth connecting rod (52-1) is hinged to the other end of the first connecting rod (51-1); the other end of the fourth connecting rod (52-1) is plugged into the connecting block (52-2); the connecting block (52-2) is mounted on the leg bracket (2); and the main body of the fourth connecting rod (52-1) is hinged to the other end of the third connecting rod (51-3).

3. The multifunctional bracket mechanism according to claim 2, Features: The hinge point between the fourth connecting rod (52-1) and the third connecting rod (51-3) is located on the fourth connecting rod (52-1); a third limiting pin (52-3) is provided on the fourth connecting rod (52-1), and a limiting groove (52-4) is provided on the first connecting rod (51-1) that matches the third limiting pin (52-3).

4. The multifunctional bracket mechanism according to claim 1, Features: The outer armrest member (41) comprises a first outer armrest member (41-1) and a second outer armrest member (41-2); the first outer armrest member (41-1) is connected to the armrest support seat (43); the second outer armrest member (41-2) is interlaced with the inner armrest member (42); and the locking mechanism (8) is installed between the first outer armrest member (41-1) and the second outer armrest member (41-2).

5. The multifunctional bracket mechanism according to claim 4, Features: The locking mechanism (8) comprises a second connecting component (81) connected to the second outer armrest member (41-2) and a first connecting component (82) connected to the first outer armrest member (41-1); the first connecting component (82) comprises a first outer ring (82-1) and a first inner ring (82-2); the second connecting component (81) comprises a second outer ring (81-1) and a second inner ring (81-2); a sliding rod (42-1) provided on the inner armrest member (42) is slidably inserted into the first inner ring (82-2) and the second inner ring (81-2); a buffer ring (85), a washer (84) and an elastic locking plate (83) are sequentially installed in the first inner ring (82-2) and abut against the second inner ring (81-2) through the first inner ring (82-2); an elastic washer (86) is installed outside the second inner ring (81-2) and abut against the second outer ring (81-1) through the first outer ring (82-1).

6. The multifunctional bracket mechanism according to claim 5, Features: The elastic locking piece (83) is a barbed structure, one end of the second inner ring (81-2) is conical and limited within one end of the first outer ring (82-1), and the second inner ring (81-2) at the conical end abuts against the elastic locking piece (83) by the forward push of the second outer armrest member (41-2), thereby expanding the elastic locking piece (83).

7. A seat, Features: Comprising a base (10) and the multi-functional bracket mechanism according to any one of claims 1 to 6, the multi-functional bracket mechanism is mounted on the base (10) through a support (6).

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