Chair frame and folding chair

Abstract

The utility model relates to the technical field of chairs, in particular to a chair frame and a folding chair, which comprise two foot rods which are oppositely arranged along the transverse direction, a connecting rod mechanism is arranged between the two foot rods and comprises two supporting rods and two linkage rods. The two supporting rods are hinged to the two foot rods respectively, and the two supporting rods are hinged together in a crossed mode. The two linkage rods are hinged to the two foot rods respectively, the other ends of the two linkage rods are hinged to the lower ends of the two supporting rods respectively, and the chair is characterized in that the chair frame further comprises two seat rods used for installing the seat body, the seat rods extend in the longitudinal direction, and the two seat rods are fixed to the two supporting rods respectively; when the chair frame is in an unfolded state, the two foot rods are obliquely arranged, and the transverse distance between the two foot rods is gradually increased from top to bottom; a locking structure capable of locking the chair frame when the chair frame is unfolded is arranged between the two supporting rods; the utility model has the advantages of good bearing performance and good stability.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a chair frame and a folding chair. Background Art

[0002] Folding chairs, that is, chairs that can be folded, are widely used in daily life and work. They are generally composed of a foldable chair frame and a flexible seat. The folding of the entire chair is achieved by folding the chair frame, such as a director's chair.

[0003] In the related art, the chair frames of some folding chairs adopt a multi-link structure to achieve folding, such as the folding chair structures disclosed in announcement numbers CN220384668U and CN205597557U.

[0004] Among the above-mentioned folding chairs, the folding chairs are mainly unfolded or folded by the relative rotation of the support tube (support rod) hinged between the two leg tubes (leg rods). When the chair is unfolded, the seat body is unfolded between the two seat rods at the top of the two leg rods for people to sit on; however, in actual use, the load-bearing performance and stability of the above-mentioned folding chairs are relatively general, which is specifically reflected in:

[0005] When a person sits on the seat, the chair frame will be subjected to a lateral force (the lateral force here can be understood as the width direction of the chair), and the support rod bears part of the lateral force, that is, the lateral force. In the above scheme, the seat rod is directly fixed on the top of the leg tube, that is, the seat rod is directly connected to the leg rod. Therefore, its lateral force needs to pass through the foot rod and then be transmitted to the support rod, rather than directly to the support rod, which results in its general load-bearing performance.

[0006] In addition, in the above two solutions, when the chair is in the unfolded state, the foot rods on both sides are almost parallel, so the supporting stability is relatively general. Utility Model Content

[0007] In order to solve at least one technical problem mentioned in the background technology, the purpose of the present utility model is to provide a chair frame and a folding chair.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] On the one hand, the utility model provides a chair frame, including two foot rods arranged opposite to each other in the transverse direction; a connecting rod mechanism is provided between the two foot rods, and the connecting rod mechanism includes two support rods and two linking rods; the two support rods are respectively hinged on the two foot rods, and the two support rods are cross-hinged together; the two linking rods are respectively hinged on the two foot rods, and the other ends are respectively hinged to the lower ends of the two support rods, and it is characterized in that the chair frame also includes two seat rods for installing the seat body, the seat rods extend longitudinally, and the two seat rods are respectively fixed on the two support rods; when the chair frame is in the unfolded state, the two foot rods are inclined, and the lateral spacing between the two foot rods gradually widens from top to bottom; a locking structure is provided between the two support rods, which can lock the chair frame when the chair frame is unfolded.

[0010] As an optional implementation of the present invention, the connecting rod mechanism includes two groups, and the two groups of connecting rod mechanisms are arranged opposite to each other in the longitudinal direction.

[0011] As an optional implementation of the utility model, the locking structure includes two positioning rods hinged at one end, and the two positioning rods are respectively hinged on two support rods; wherein, in the unfolded state, the hinged ends of the two positioning rods abut against each other to form self-locking.

[0012] As an optional implementation of the utility model, one end of the two positioning rods that is away from each other is connected to a longitudinal rod extending in the longitudinal direction.

[0013] As an optional implementation manner of the present invention, the end of the seat rod is fixed to the upper end of the support rod through a connecting seat.

[0014] On the other hand, the utility model provides a folding chair, comprising a chair frame and a flexible seat body mounted on the chair frame, characterized in that the chair frame adopts the above-mentioned chair frame; the seat body is mounted on two seat rods, and when the folding chair is unfolded, the seat body is at least partially unfolded horizontally between the two seat rods to form a seat cushion.

[0015] As an optional implementation manner of the utility model, it also includes handrails arranged on both sides, the two handrails are rotatably connected to the two support rods respectively, and the rotation axes thereof are arranged along the longitudinal direction.

[0016] As an optional implementation of the utility model, the seat body also includes a back pad; a back support rod is provided on the armrest rod, one end of the back support rod is hinged to the armrest rod, and its rotation axis is arranged horizontally; the side of the back pad is installed on the back support rod.

[0017] As an optional implementation manner of the utility model, it also includes a side table board, which is hinged on the support rod, and a hinge is provided between the side table board and the foot rod on the same side thereof. In the unfolded state, the hinge supports the side table board to unfold the table board.

[0018] As an optional implementation of the utility model, the hinge includes a first connecting rod and a second connecting rod hinged at one end, the other end of the first connecting rod is hinged to the side table board, and the other end of the second connecting rod is hinged to the foot rod.

[0019] Compared with the prior art, the advantages of adopting this solution are:

[0020] The chair frame provided by the utility model, when in use, because the seat rod is directly connected to the support rod rather than to the foot rod, when the chair frame is bearing weight, the lateral force borne by the seat rod can be directly transmitted to the support rod without being indirectly transmitted through the foot rod, thereby helping to improve the load-bearing performance of the chair frame.

[0021] In addition, the two legs in the utility model are inclined in the unfolded state, and the lateral distance between the two legs gradually widens from top to bottom; at this time, the two legs are equivalent to being distributed in an eight-shaped shape, forming an oblique support structure, which can undoubtedly improve the stability of the entire folding chair in the unfolded state compared to the parallel arrangement of the two legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model in a fully unfolded state;

[0023] Figure 2 for Figure 1 The main view;

[0024] Figure 3 The structure of the utility model in the folding process is shown in FIG. Figure 1 .

[0025] Figure 4 The structure of the utility model in the folding process is shown in FIG. Figure 2 .

[0026] Figure 5 The structure of the utility model in the folding process is shown in FIG. Figure 3 .

[0027] Figure 6 It is a structural schematic diagram of the utility model in a fully folded state. DETAILED DESCRIPTION

[0028] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0029] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0030] Example 1

[0031] See also Figure 1-6 As shown, this embodiment provides a chair frame, including two foot rods 1 arranged opposite to each other in the transverse direction; in this embodiment, the transverse direction can also be understood as the width direction of the chair frame, and the longitudinal direction can be understood as the horizontal direction perpendicular to the transverse direction.

[0032] like Figure 1 As shown, a connecting rod mechanism is arranged between the two foot rods 1, wherein the foot rod 1 is a U-shaped rod structure as a whole. The connecting rod mechanism is preferably two groups, and the two connecting rod mechanisms have basically the same structure, and are arranged at the front and rear sides of the two foot rods 1 respectively.

[0033] Combination Figure 2 As shown, the connecting rod mechanism includes two support rods 2 and two linkage rods 3; the two support rods 2 are respectively hinged at the top of the two foot rods 1 to form a first hinge point R1, and the two support rods 2 are cross-hinged together to form a second hinge point R2.

[0034] One end of the two connecting rods 3 is hinged on the two foot rods 1 to form a fourth hinge point R4, and the other end is hinged to the lower end of the two support rods 2 to form a third hinge point R3, wherein the first hinge point R1 is located above the fourth hinge point R4; in the length direction of the support rod 2, the second hinge point R2 is located between the third hinge point R3 and the first hinge point R1.

[0035] The chair frame further includes two seat rods 12 for mounting the seat body 5, the seat rods 12 extending in the longitudinal direction, and the two seat rods 12 are respectively fixed on the two support rods 2, specifically, the two ends of each seat rod 12 are respectively fixed on the two support rods 2 of the front and rear connecting rod structures, for example, a connecting seat 11 is fixed on the upper end of the support rod 2, and the end of the seat rod 12 is fixed on the connecting seat 11. The first hinge point R1 is located between the connecting seat 11 and the second hinge point R2.

[0036] The chair frame is in the unfolded state. Figure 2 As described above, the two legs 1 are arranged at an angle, and the horizontal distance between the two legs 1 gradually widens from top to bottom, that is, the two legs 1 are equivalent to being distributed in an eight-shaped shape, forming a diagonal support structure. Compared with the two legs 1 being arranged in parallel, it can undoubtedly improve the stability of the entire folding chair in the unfolded state.

[0037] In this embodiment, the seat rod 12 is directly connected to the support rod 2, rather than to the foot rod 1. In this way, when the chair frame is bearing weight, the lateral force borne by the seat rod 12 can be directly transmitted to the support rod 2 without being indirectly transmitted through the foot rod 1, thereby facilitating the improvement of the load-bearing performance of the chair frame.

[0038] In addition, a locking structure capable of locking the chair frame when the chair frame is unfolded is provided between the two support rods 2. The two support rods 2 are locked by the locking mechanism, thereby keeping the chair frame in the unfolded state.

[0039] The locking structure comprises two positioning rods 4 hinged at one end, and the two positioning rods 4 are respectively hinged on the two support rods 2; wherein, in the unfolded state, Figure 1 As shown, the hinged ends of the two positioning rods 4 abut against each other to form a self-locking effect. Specifically, the opposite ends of the two positioning rods 4 are respectively fixed with positioning seats 41, and the lower parts of the two positioning seats 41 are hinged. When unfolded, the upper parts of the two positioning seats 41 abut against each other, producing a self-locking effect, thereby limiting the two positioning rods 4 from continuing to flip downward.

[0040] The ends of the two positioning rods 4 that are away from each other are connected with a longitudinal rod 42 extending in the longitudinal direction. The longitudinal rod 42 is equivalent to an operating rod for operating the chair frame to fold. Specifically, when the chair frame needs to be folded, pressing the longitudinal rod 42 downward can drive the outer end of the positioning rod 4 to flip downward, thereby causing the two positioning seats 41 to rotate upward, and then linking the two support rods 2 to rotate. The end of the support rod 2 drives the linkage rod 3 and the foot rod 1 to rotate, so that the chair frame is folded.

[0041] Preferably, Figure 3 and Figure 4 As shown, in this embodiment, the longitudinal rod 42 and the two positioning rods 4 on the same side are an integrated structure, presenting a U-shaped rod structure, wherein the middle portion of the U-shaped rod structure constitutes the longitudinal rod 42 , and the two side portions constitute the two positioning rods 4 .

[0042] Example 2

[0043] like Figure 1-6 As shown, this embodiment provides a folding chair based on the embodiment 1, including the chair frame provided in the embodiment 1 and a flexible seat body 5 installed on the chair frame, wherein the seat body 5 can be a cloth cover structure.

[0044] The seat body 5 is mounted on two seat rods 12, and when the folding chair is unfolded, Figure 1 As shown, the seat body 5 is at least partially unfolded horizontally to form a seat cushion 52 between the two seat poles 12 for a person to sit on.

[0045] In addition, the folding chair provided in this embodiment also includes armrest rods 6 arranged on both sides, and the two armrest rods 6 are rotatably connected to the two support rods 2 respectively. Specifically, the two armrest rods 6 are inverted U-shaped structure, and their two ends are respectively hinged on two connecting seats 11 on the same side; the rotation axis of the armrest rods 6 is arranged along the longitudinal direction; in this way, the armrest rods 6 can be folded.

[0046] The seat body 5 further includes a back cushion 51 , which is used as a backrest of the chair. In this embodiment, the back cushion 51 and the seat cushion 52 are an integrated structure, that is, one part of the seat body 5 forms the seat cushion 52 , and the other part forms the back cushion 51 .

[0047] Combination Figure 1 and Figure 4 As shown, the handrail rod 6 is provided with a back support rod 61 for supporting the back pad 51 , one end of the back support rod 61 is hinged to the handrail rod 6 , and its rotation axis is arranged horizontally; the side of the back pad 51 is installed on the back support rod 61 .

[0048] It is worth noting that if Figure 1 As shown, when the armrest rod 6 is flipped up to an upright state (i.e. fully unfolded), it will be limited by the connecting seat 11, so that the armrest rod 6 cannot continue to flip toward the seat cushion 52; in this way, under the tension of the back cushion 51, the two armrest rods 6 cannot continue to move closer to each other after unfolding, so that the armrest rod 6 and the back cushion 51 remain in the unfolded state.

[0049] In addition, in order to be able to place items, the present embodiment also includes a side table panel 7, the side table panel 7 is hinged on the support rod 2, and a hinge is provided between the side table panel 7 and the foot rod 1 on the same side thereof. In the unfolded state, the hinge supports the side table panel 7 to unfold the side table panel 7. Specifically: the hinge includes a first connecting rod 81 and a second connecting rod 82 hinged at one end, the other end of the first connecting rod 81 is hinged to the side table panel, and the other end of the second connecting rod 82 is hinged to the foot rod 1.

[0050] The folding process of this embodiment is as follows:

[0051] First, press the longitudinal rod 42 downward to drive the two connecting seats 11 to rotate upward. Figure 3 As shown, the two support rods 2 are linked to rotate, and the ends of the support rods 2 drive the linkage rods 3 and the foot rods 1 to rotate, so that the chair frame is folded up; at the same time, the side table panels 7 will also begin to flip downwards driven by the hinges, and finally close to the side of the foot rods 1, presenting as shown in FIG. Figure 4 Status shown.

[0052] When the two foot rods 1 are brought together, the two back support rods 61 are folded downward so that they are brought together on the handrail rod 6 to form a Figure 5 Status shown.

[0053] Finally, the two handrails 6 are rotated and folded to the sides to bring the two sides of the folded chair frame together. At this time, the entire folding chair is completely folded, presenting a Figure 6 Status shown.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A chair frame, characterized in that: It includes two foot rods arranged opposite to each other in the transverse direction; a connecting rod mechanism is provided between the two foot rods, and the connecting rod mechanism includes two support rods and two connecting rods; the two support rods are respectively hinged on the two foot rods, and the two support rods are cross-hinged together; one end of the two connecting rods is respectively hinged on the two foot rods, and the other end is respectively hinged to the lower ends of the two support rods. It is characterized in that the chair frame also includes two seat rods for installing the seat body, the seat rods extend longitudinally, and the two seat rods are respectively fixed on the two support rods; when the chair frame is in the unfolded state, the two foot rods are inclined, and the lateral spacing between the two foot rods gradually widens from top to bottom; a locking structure is provided between the two support rods, which can lock the chair frame when the chair frame is unfolded.

2. A chair frame according to claim 1, characterized in that: The connecting rod mechanism comprises two groups, and the two groups of connecting rod mechanisms are arranged opposite to each other in the longitudinal direction.

3. A chair frame according to claim 1 or 2, characterized in that: The locking structure comprises two positioning rods hinged at one end, and the two positioning rods are respectively hinged on two supporting rods; wherein, in the unfolded state, the hinged ends of the two positioning rods abut against each other to form a self-locking.

4. A chair frame according to claim 3, characterized in that: One end of the two positioning rods that is away from each other is connected with a longitudinal rod extending in the longitudinal direction.

5. The chair frame according to claim 1, characterized in that: The end of the seat rod is fixed to the upper end of the support rod through a connecting seat.

6. A folding chair, comprising a chair frame and a flexible seat mounted on the chair frame, characterized in that: The chair frame adopts the chair frame as described in any one of claims 1-5; the seat body is installed on two seat rods, and when the folding chair is unfolded, the seat body is at least partially unfolded horizontally to form a seat cushion between the two seat rods.

7. The folding chair according to claim 6, characterized in that: It also includes handrails arranged on both sides. The two handrails are rotatably connected to the two support rods respectively, and the rotation axes thereof are arranged along the longitudinal direction.

8. The folding chair according to claim 7, characterized in that: The seat body also includes a back pad; a back support rod is provided on the handrail rod, one end of the back support rod is hinged on the handrail rod, and its rotation axis is arranged in the transverse direction; the side of the back pad is installed on the back support rod.

9. The folding chair according to claim 6, characterized in that: It also includes a side table board, which is hinged on the support rod. A hinge is provided between the side table board and the foot rod on the same side. In the unfolded state, the hinge supports the side table board to unfold the table board.

10. The folding chair according to claim 9, characterized in that: The hinge comprises a first connecting rod and a second connecting rod which are hinged at one end, the other end of the first connecting rod is hinged to the side table board, and the other end of the second connecting rod is hinged to the foot rod.

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