Chair

Abstract

The utility model discloses a chair which comprises a chair seat, a backrest and a connecting arm, the upper part of the connecting arm is hinged with the backrest, the middle part of the connecting arm is hinged with the rear end of the chair seat, and the lower part of the connecting arm is detachably connected with the lower part of the backrest through a connecting piece. Therefore, after the backrest and the chair seat are separated, the backrest can rotate independently, so that the chair can be folded to the maximum extent, and the chair is convenient to fold and transport.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of home, especially a chair. BACKGROUND

[0002] Massage chairs are a kind of health care appliances that are deeply loved by people. The existing back massage is often realized through massage chairs. At present, massage chairs are constantly updated and replaced, and new massage chairs are emerging in an endless stream. Massage chairs achieve the purpose of relaxing muscles and blood, and eliminating fatigue through massage, kneading and knocking on specific parts of the human body.

[0003] The prior art with publication number CN114451716A discloses a chair, which comprises a seat frame, a leg rest plate, a back frame, an electric push rod, a linkage, a back frame adjusting part and a leg rest plate adjusting part. The leg rest plate and the back frame are respectively hinged at both ends of the seat frame. The linkage is hinged on the seat frame. The electric push rod is used to drive the linkage to swing. The linkage completes the linkage of the back frame and the leg rest plate through the back frame adjusting part and the leg rest plate adjusting part. The back frame adjusting part and the leg rest plate adjusting part are both composed of multiple connection seats that are hingedly connected in sequence. In this way, each connection seat can swing in a small range when the linkage drives the back frame adjusting part and the leg rest plate adjusting part to move.

[0004] In the prior art, the massage chair has a large volume, which leads to a large space occupied by the massage chair during transportation and a small amount of transportation per time. UTILITY MODEL CONTENTS

[0005] In order to solve the problem of inconvenient transportation and small transportation quantity of the chair caused by the large volume of the backrest in the prior art, the purpose of the utility model is to provide a chair which can effectively fold the seat and the backrest, thereby facilitating the transportation of the chair.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a chair, comprising a seat, a backrest and a connecting arm. The upper part of the connecting arm is hingedly connected with the backrest. The middle part of the connecting arm is hingedly connected with the rear end of the seat. The lower part of the connecting arm is connected with the lower part of the backrest in a detachable manner through a connecting piece.

[0007] As a preferred, a driving mechanism is arranged on the seat. The driving mechanism drives the leg rest plate to lift up or retract and simultaneously drives the backrest to tilt and turn over through the connecting arm and the connecting piece.

[0008] As a preferred, the connecting piece comprises a second clamping piece. The second clamping piece is installed on the connecting arm in a reversible manner. The second clamping piece can be connected with or separated from the bottom of the backrest. When the second clamping piece is clamped with the backrest, the driving mechanism can drive the backrest to tilt through the connecting arm and the connecting piece. When the second clamping piece is separated from the backrest, the backrest can be independently rotated until it is stacked with the seat.

[0009] As preferred, the bottom of the connecting arm is fixed with a first clamping piece, the second clamping piece is hinged with the first clamping piece through a first shaft, a torsional spring is sleeved on the first shaft, one leg of the torsional spring abuts against the first clamping piece, the other leg of the torsional spring abuts against the bottom of the second clamping piece, the torsional spring can drive the second clamping piece to overturn, and the second clamping piece is clamped with the backrest.

[0010] As preferred, the two connecting arms are arranged on the left and right sides of the backrest respectively, and the two connecting arms are fixedly connected through a first reinforcing rod, and the first clamping piece is fixed on the first reinforcing rod.

[0011] As preferred, the bottom of the backrest is fixed with a third clamping piece, the third clamping piece is provided with a second shaft, the second clamping piece is provided with a clamping groove, and the third clamping piece and the second clamping piece are connected through the second shaft and the clamping groove.

[0012] As preferred, the driving mechanism comprises driving pieces and two sets of link assemblies, the link assemblies are installed on the seat, the driving pieces are used for driving the link assemblies to move, and the leg rest plate and the connecting arm are connected through the link assemblies.

[0013] As preferred, the link assembly comprises a first link, a second link, a third link, a fourth link and a fifth link, the rear end of the first link is hinged with the connecting arm, the front end of the first link is hinged with the second link, the top of the second link is hinged with the seat, the bottom of the second link is hinged with the lower end of the fourth link, the upper end of the third link is hinged with the seat, the third link is hinged with the fourth link, the lower end of the third link is hinged with the lower end of the fifth link, the upper end of the fourth link is hinged with the leg rest plate mounting frame, the upper end of the fifth link is hinged with the leg rest plate mounting frame, and the leg rest plate is fixedly installed on the two leg rest plate mounting frames.

[0014] As preferred, the driving piece is an electric push rod.

[0015] As preferred, the chair further comprises supporting legs, the supporting legs are arranged below the seat, and the supporting legs and the seat are connected through air cylinders.

[0016] The technical scheme of the utility model has the advantages that: the backrest can rotate alone after being separated from the seat, so that the chair can be folded to the maximum extent, and the chair is convenient to fold and transport; when the chair is used normally, the driving mechanism can realize linkage of the backrest and the leg rest plate mounting frame, and synchronously adjust the position angle of the backrest and the leg rest plate mounting frame. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the chair in an upright state;

[0018] Figure 2 is a structural schematic view of the chair in a lying state Figure 1 ;

[0019] Figure 3 This is a structural diagram of the chair in its folded state;

[0020] Figure 4 A schematic diagram of the chair's structure in its reclining position. Figure 2 ;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 A schematic diagram of the connection structure between the first and second card components;

[0023] Figure 7 This is a schematic diagram of the second card component.

[0024] Reference numerals: 1. Support leg; 11. Cylinder;

[0025] 2. Chair seat;

[0026] 3. Backrest;

[0027] 4. Connecting component; 41. First locking component; 411. First abutting surface; 42. Second locking component; 421. Second abutting surface; 422. Slot; 43. First shaft; 44. Torsion spring; 45. Third locking component; 46. Second shaft;

[0028] 5. Drive mechanism; 51. Drive component; 52. First link; 53. Second link; 54. Third link; 55. Fourth link; 56. Fifth link; 57. Second reinforcing rod;

[0029] 6. Leg rest mounting bracket;

[0030] 7. Connecting arm; 71. First reinforcing rod. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0034] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0036] Embodiment

[0037] As Figures 1-7The chair comprises a seat 2, a backrest 3, a connecting arm 7, a leg rest mounting frame 6 and a driving mechanism 5. The upper part of the connecting arm 7 is hinged to the backrest 3, the middle part of the connecting arm 7 is hinged to the rear end of the seat 2, the lower part of the connecting arm 7 is detachably connected to the lower part of the backrest through a connecting piece 4, and the driving mechanism is arranged on the seat 2. The driving mechanism drives the leg rest to be lifted or retracted and simultaneously drives the backrest 3 to be tilted and overturned through the connecting arm 7 and the connecting piece 4.

[0038] In this way, the backrest can be rotated alone after being separated from the seat, so that the chair can be folded to the maximum extent and is convenient for folding and transporting. When the chair is used normally, the backrest and the leg rest mounting frame 6 can be linked and the position angle of the backrest and the leg rest mounting frame 6 can be adjusted synchronously through the driving mechanism.

[0039] In this embodiment, as shown in Figure 4 and Figure 5 , the connecting piece 4 comprises a second clamping piece 42, which is reversibly arranged on the connecting arm 7 and can be connected to or separated from the bottom of the backrest 3. When the second clamping piece 42 is clamped to the backrest 3, the driving mechanism 5 can drive the backrest 3 to be tilted through the connecting arm 7. When the second clamping piece 42 is reversed, the backrest 3 can be rotated alone until it is overlapped with the seat.

[0040] Further preferably, as shown in Figure 6 and Figure 7 , the rear end of the second clamping piece 42 is beveled, and the backrest can be reversed to make the second clamping piece 42 be reversed when the second shaft 46 slides along the rear end of the second clamping piece 42.

[0041] Further preferably, the bottom of the connecting arm 7 is fixed with a first clamping piece 41, the second clamping piece 42 is hinged to the first clamping piece 41 through a first shaft 43, a torsional spring 44 is sleeved on the first shaft 43, one leg of the torsional spring 44 abuts against the first clamping piece 41, and the other leg of the torsional spring 44 abuts against the bottom of the second clamping piece 42. The torsional spring 44 can drive the second clamping piece 42 to be reversed to make the second clamping piece 42 abut against the first clamping piece 41 and be clamped to the backrest 3.

[0042] Further preferably, as shown in Figure 6 and Figure 7 , the rear end of the first clamping piece 41 comprises a first abutting surface 411, the front end of the second clamping piece 42 comprises a second abutting surface 421, and the torsional spring 44 can drive the second abutting surface 421 of the second clamping piece 42 to abut against the first abutting surface 411 of the first clamping piece 41, thereby limiting the state of the second clamping piece 42.

[0043] Further preferably, as shown in Figure 6 and Figure 7As shown, the bottom of the backrest 3 is fixed with a third clamping piece 45, and the second clamping piece 42 is provided with a clamping groove 422, and the backrest 3 and the second clamping piece 42 are connected through the third clamping piece 45 and the clamping groove 422.

[0044] Further preferably, as shown in Figure 4 and Figure 5 As shown, two connecting arms 7 are respectively arranged on the left and right sides of the backrest 3, the two connecting arms 7 are fixedly connected through a first reinforcing rod 71, and the first clamping piece 41 is fixed on the first reinforcing rod 71. Further, the first clamping piece 41 is arranged at the middle position of the first reinforcing rod 71, and the third clamping piece 45 is arranged at the middle position of the backrest 3.

[0045] Further preferably, the third clamping piece 45 is provided with a second shaft 46, and the third clamping piece 45 and the second clamping piece 42 are connected through the second shaft 46 and the clamping groove 422.

[0046] In this embodiment, as shown in Figures 1 to 5 The driving mechanism 5 includes a driving piece 51 and a linkage assembly, the linkage assembly is installed on the seat 2, the driving piece 51 is used to drive the linkage assembly to move, and the leg rest plate and the connecting arm 7 are connected through the linkage assembly.

[0047] Further preferably, as shown in Figures 1 to 5 The linkage assembly includes a first linkage 52, a second linkage 53, a third linkage 54, a fourth linkage 55 and a fifth linkage 56, the rear end of the first linkage 52 is hinged with the connecting arm 7, the front end of the first linkage 52 is hinged with the second linkage 53, the top of the second linkage 53 is hinged with the seat 2, the bottom of the second linkage 53 is hinged with the lower end of the fourth linkage 55, the upper end of the third linkage 54 is hinged with the seat 2, the third linkage 54 is hinged with the fourth linkage 55, the lower end of the third linkage 54 is hinged with the lower end of the fifth linkage 56, the upper end of the fourth linkage 55 is hinged with the leg rest plate mounting bracket 6, and the upper end of the fifth linkage 56 is hinged with the leg rest plate mounting bracket 6.

[0048] Further preferably, as shown in Figures 1 to 5 The linkage assembly has two groups, and the two groups of linkage assemblies are respectively connected with the two connecting arms 7; among the two groups of linkage assemblies, the two third linkages 54 are fixedly connected through a second reinforcing rod 57, the leg rest plate is fixedly installed on the left and right leg rest plate mounting brackets 6; and the driving piece 51 is arranged between the seat 2 and the second reinforcing rod 57. Among them, the driving piece 51 is an electric push rod, the cylinder body of the electric push rod is hinged with the seat 2, and the telescopic rod of the electric push rod is hinged with the second reinforcing rod 57.

[0049] In this embodiment, as shown in Figures 1 to 4 The chair further includes a leg rest plate and a support foot 1, the leg rest plate is installed on the two leg rest plate mounting brackets 6, the support foot 1 is arranged below the seat 2, and the support foot 1 and the seat 2 are connected through the air cylinder 11.

[0050] When the chair is used normally, the manual rotation of the backrest swings the second shaft at the bottom of the backrest forward, the second shaft moves from back to front and presses the rear end of the second clamping piece downward, the second shaft eye slides and presses the rear end of the second clamping piece downward, and the second clamping piece rotates, when the second shaft moves to the clamping groove of the second clamping piece, the torsion spring drives the second clamping piece to reset; then, the driving piece drives the second reinforcing rod to move forward, the second reinforcing rod drives the third connecting rod to turn over forward, the third connecting rod drives the fifth connecting rod and the fourth connecting rod to move, the third connecting rod drives the leg rest plate mounting frame to stretch out forward; the fourth connecting rod also drives the second connecting rod to move, the second connecting rod drives the first connecting rod to move, the first connecting rod drives the connecting arm to rotate, and the connecting arm drives the backrest to turn over to keep the backrest in the upright state or the lying state.

[0051] When the chair needs to be folded and packed, the driving mechanism drives the backrest to return to the upright state, then presses the rear end of the second clamping piece 42, makes the second shaft 46 and the clamping groove 422 of the second clamping piece 42 disengage, then turns over the backrest 3 forward, makes the backrest 3 press on the seat 2, and further makes the chair convert to the folded state.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and purposes of the present application.

Claims

1. A chair, characterized in that: It includes a seat (2), a backrest (3) and a connecting arm (7); the upper part of the connecting arm (7) is hinged to the backrest (3), the middle part of the connecting arm (7) is hinged to the rear end of the seat (2), and the lower part of the connecting arm (7) is detachably connected to the lower part of the backrest (3) through a connector (4).

2. A chair according to claim 1, characterized in that: The drive mechanism is set on the seat (2). The drive mechanism (5) drives the leg rest to lift or retract and simultaneously drives the backrest (3) to tilt and flip through the connecting arm (7) and the connecting piece (4).

3. A chair according to claim 2, characterized in that: The connector (4) includes a second latch (42), which is mounted on the connecting arm (7) in a flip-out manner. The second latch (42) can be connected to or separated from the bottom of the backrest (3). When the second latch (42) is engaged with the backrest (3), the drive mechanism (5) can drive the backrest (3) to tilt through the connecting arm (7) and the connector (4). When the second latch (42) is disengaged from the backrest (3), the backrest (3) can rotate independently until it overlaps with the seat.

4. A chair according to claim 3, characterized in that: The bottom of the connecting arm (7) is fixed with a first clip (41), and the second clip (42) is hinged to the first clip (41) through the first shaft (43). A torsion spring (44) is sleeved on the first shaft (43). One leg of the torsion spring (44) abuts against the first clip (41), and the other leg of the torsion spring (44) abuts against the bottom of the second clip (42). The torsion spring (44) can drive the second clip (42) to flip and make the second clip (42) engage with the backrest (3).

5. A chair according to claim 4, characterized in that: Two connecting arms (7) are respectively set on the left and right sides of the backrest (3). The two connecting arms (7) are fixedly connected by the first reinforcing rod (71), and the first clip (41) is fixed on the first reinforcing rod (71).

6. A chair according to claim 3, characterized in that: The bottom of the backrest (3) is fixed with a third clip (45), a second shaft (46) is provided on the third clip (45), and a slot (422) is provided on the second clip (42). The third clip (45) and the second clip (42) are connected by the second shaft (46) and the slot (422).

7. A chair according to claim 2, characterized in that: The drive mechanism (5) includes a drive component (51) and two sets of left and right linkage assemblies. The linkage assemblies are installed on the seat (2). The drive component (51) is used to drive the linkage assembly to move. The leg rest and the connecting arm (7) are linked together through the linkage assembly.

8. A chair according to claim 7, characterized in that: The linkage assembly includes a first link (52), a second link (53), a third link (54), a fourth link (55), and a fifth link (56). The rear end of the first link (52) is hinged to the connecting arm (7), the front end of the first link (52) is hinged to the second link (53), the top of the second link (53) is hinged to the seat (2), the bottom of the second link (53) is hinged to the lower end of the fourth link (55), the upper end of the third link (54) is hinged to the seat (2), the third link (54) is hinged to the fourth link (55), the lower end of the third link (54) is hinged to the lower end of the fifth link (56), the upper end of the fourth link (55) is hinged to the leg rest mounting bracket (6), and the upper end of the fifth link (56) is hinged to the leg rest mounting bracket (6). The leg rest is fixedly installed on the left and right leg rest mounting brackets (6).

9. A chair according to claim 7, characterized in that: The drive component (51) is an electric push rod.

10. A chair according to claim 1, characterized in that: The chair also includes a support leg (1), which is located under the seat (2). The support leg (1) and the seat (2) are connected by a gas spring (11).

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