Folding chair

Abstract

The utility model relates to a folding chair which comprises a front supporting leg frame, a rear supporting leg frame, a chair seat frame, a backrest frame and two bearing parts arranged on the chair seat frame and the backrest frame respectively, the chair seat frame is hinged to the front supporting leg frame, and armrests are hinged to the outer sides of two side arms of the backrest frame. The armrests are provided with connecting parts connected with the rear supporting leg frame and the front supporting leg frame respectively, hinge parts are hinged to side arms of the rear supporting leg frame, the hinge parts are hinged to the backrest frame and the seat frame respectively, and first stress parts are formed at the joints of the side arms of the backrest frame and the hinge parts. A second stress part is formed at the joint of the side arm of the chair seat frame and the hinge part, and after the chair is unfolded, the side arm of the rear supporting leg frame supports the first stress part and the second stress part. The folding chair has the effects that two points are stressed at the same time, so that the stress area is increased, the overall bearing capacity of the folding chair is enhanced, and the stability of the chair in the using process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of travel products, and particularly relates to a folding chair. BACKGROUND

[0002] As a common furniture, the folding chair is widely used in family, office and outdoor activities.

[0003] The existing Chinese utility model patent with the publication number CN221265631U discloses an adjustable folding chair, which comprises a support frame, a seat frame, a back frame and an armrest. The support frame is provided as two, the top of the two support frames is hinged to each other, one end of the seat frame is hinged to one of the support frames, the other end of the seat frame is hinged to the other support frame through a hinge piece, the back frame is hinged to the top of the seat frame, one end of the armrest is hinged to the back frame, and the end of the armrest away from the back frame is provided with a backrest adjusting assembly between the armrest and the support frame.

[0004] However, the related technology has the following problems: the other end of the seat frame is hinged to the other support frame (rear leg frame) through the hinge piece. When the folding chair is unfolded, only one point of the connection between the rear leg frame and the hinge piece is stressed, which results in the general stability of the folding chair. Therefore, further improvement is needed. UTILITY MODEL CONTENT

[0005] In order to enable the side arm of the rear leg frame to support the first stress part and the second stress part at the same time when the folding chair is unfolded, to realize the stress of two points at the same time, to increase the stress area, to enhance the carrying capacity of the folding chair as a whole, and to ensure the stability of the chair during use, the present application provides a folding chair.

[0006] The folding chair provided by the present application adopts the following technical scheme:

[0007] The folding chair comprises a front leg frame, a rear leg frame, a seat frame, a back frame and two carrying parts respectively arranged on the seat frame and the back frame. The seat frame is hinged to the front leg frame. The two side arms of the back frame are each hinged to an armrest. The armrest is provided with a connecting part connected to the rear leg frame and the front leg frame. The side arm of the rear leg frame is hinged to a hinge part. The hinge part is hinged to the back frame and the seat frame. The connection between the side arm of the back frame and the hinge part forms a first stress part. The connection between the side arm of the seat frame and the hinge part forms a second stress part. When unfolded, the side arm of the rear leg frame supports the first stress part and the second stress part.

[0008] By adopting the above technical scheme, when the folding chair is unfolded, the side arm of the rear leg frame can support the first stress part and the second stress part at the same time, and two-point stress is realized. Compared with single-point stress, the design can increase the stress area, enhance the overall carrying capacity of the folding chair, and ensure the stability of the chair during use; at the same time, the existence of the first stress part and the second stress part can also move the backrest frame backward through the action of the hinge part when the folding chair is folded, so as to shorten the folding length of the folding chair and save the storage space.

[0009] Preferably, the hinge part comprises a hinge plate, the side arm of the rear leg frame is hinged to the bottom end of the hinge plate through a rotating piece, one end of the hinge plate away from the rotating piece is provided with a first hinge piece, the side arm of the backrest frame is hinged to the hinge plate through the first hinge piece, and the hinge plate is provided with a second hinge piece between the rotating piece and the first hinge piece, and the side arm of the seat frame is hinged to the hinge plate through the second hinge piece.

[0010] By adopting the above technical scheme, the design of the hinge part makes the side arm of the rear leg frame support the first stress part and the second stress part at the same time, so as to realize two-point stress. Compared with single-point stress, the stress area is increased, and the overall carrying capacity of the folding chair is enhanced; in addition, the design can also move the backrest frame backward through the reverse movement of the hinge plate when the folding chair is folded, so as to shorten the folding length of the folding chair.

[0011] Preferably, an arc-shaped section is formed on the hinge plate, and the arc-shaped section is located between the first stress part and the second stress part.

[0012] By adopting the above technical scheme, the arc-shaped section formed on the hinge plate is located between the first stress part and the second stress part, which can ensure that the side arm of the rear leg frame can support the first stress part and the second stress part at the same time after the folding chair is unfolded, so as to realize two-point stress. Compared with single-point stress, the stress area is increased, and the overall carrying capacity and stability of the folding chair are improved.

[0013] Preferably, the hinge plate is a straight strip plate.

[0014] By adopting the above technical scheme, the hinge plate is designed as a straight strip plate, which can ensure that the distance between the first hinge piece and the second hinge piece is long enough by lengthening the length of the hinge plate; in this way, the side arm of the rear leg frame can stably support the first stress part and the second stress part at the same time after the folding chair is unfolded, so as to realize the effect of two-point stress.

[0015] Preferably, two hinge plates are arranged on the same hinge part, and the side arm of the rear leg frame is located between the two hinge plates.

[0016] By adopting the above technical scheme, when the folding chair is unfolded, the two hinged plates can more evenly disperse the force from the first force receiving part and the second force receiving part, thereby improving the stability and load bearing capacity of the entire folding chair; meanwhile, this design can also ensure that the side arms of the rear leg frame more stably support the first force receiving part and the second force receiving part, thereby further enhancing the structural strength of the folding chair.

[0017] Preferably, a buffer is sleeved on each of the first force receiving part and the second force receiving part.

[0018] By adopting the above technical scheme, when the folding chair bears external load, the buffer can absorb part of the impact energy, thereby reducing the occurrence of stress concentration and further prolonging the service life of the folding chair; and the buffer added on the first force receiving part and the second force receiving part can effectively protect the first force receiving part and the second force receiving part.

[0019] Preferably, the connecting component comprises an adjusting seat fixedly connected to the bottom surface of the armrest and located at the end of the armrest away from the backrest frame, a sliding piece fixedly connected to the end of the side arm of the rear leg frame, and a connecting piece hinged to the end of the side arm of the front leg frame, the connecting piece being fixed to the side arm of the rear leg frame, the side surface of the adjusting seat being provided with an adjusting channel, a plurality of obliquely arranged and equidistantly distributed clamping ports being formed on the adjusting channel, the sliding piece being in sliding connection with the adjusting channel, and the sliding piece being in clamping connection with the clamping ports.

[0020] By adopting the above technical scheme, the adjusting channel on the adjusting seat cooperates with the sliding piece and the clamping ports to allow the user to adjust the inclination angle of the backrest frame relative to the seat frame according to different needs, thereby improving the comfort of use.

[0021] Preferably, the connecting component comprises a connecting seat fixedly connected to the bottom surface of the armrest, the end of the connecting seat close to the backrest frame being hinged to the end of the side arm of the rear leg frame, and the end of the connecting seat away from the backrest frame being hinged to the end of the side arm of the front leg frame.

[0022] By adopting the above technical scheme, the connecting structure is simplified, the folding chair can be operated more conveniently during unfolding and folding while the structural stability is ensured.

[0023] Preferably, the two side arms of the seat frame and the two side arms of the backrest frame are both connected with a support rod for enhancing the structural stability through a mounting component.

[0024] By adopting the above technical scheme, the arrangement of the support rod significantly improves the overall structural stability of the seat frame and the backrest frame, thereby enhancing the load bearing capacity and service life of the folding chair.

[0025] Preferably, the two bending parts of the front leg frame and the two bending parts of the rear leg frame are provided with reinforcing members.

[0026] By adopting the above technical scheme, the reinforcing members can significantly improve the anti-deformation capability of the front leg frame and the rear leg frame at the bending parts, effectively reduce the problem of fracture or deformation of the bending parts caused by external load or long-term use, and thus ensure the structural stability and service life of the entire folding chair.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. When the folding chair is unfolded, the side arm of the rear leg frame can support the first stress part and the second stress part at the same time, realizing two-point simultaneous stress. Compared with single-point stress, this design can increase the stress area, enhance the overall carrying capacity of the folding chair, and ensure the stability of the chair during use; at the same time, the existence of the first stress part and the second stress part can also move the backrest frame backward through the action of the hinge part when folding the folding chair, so as to shorten the folding length of the folding chair and save storage space;

[0029] 2. The arc-shaped section formed on the hinge plate is located between the first stress part and the second stress part, which can ensure that the side arm of the rear leg frame can support the first stress part and the second stress part at the same time after the folding chair is unfolded, thereby realizing two-point simultaneous stress. Compared with single-point stress, the stress area is increased, and the overall carrying capacity and stability of the folding chair are improved;

[0030] 3. When the folding chair bears external load, the buffer member can absorb part of the impact energy, reduce the occurrence of stress concentration phenomenon, and thus prolong the service life of the folding chair; and the buffer member added on the first stress part and the second stress part can effectively protect the first stress part and the second stress part. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the overall structure of embodiment 1 of the present application.

[0032] Figure 2 is Figure 1 a partial enlarged view of part A in FIG. 1.

[0033] Figure 3 is Figure 1 a partial enlarged view of part B in FIG. 1.

[0034] Figure 4 is a schematic view of the overall structure of another view of embodiment 1 of the present application.

[0035] Figure 5 is Figure 4 a partial enlarged view of part C in FIG. 1.

[0036] Figure 6 is Figure 4 is a partial enlarged view of part D in figure 1.

[0037] Figure 7 is a structural schematic view of a folding chair in a half-folded state according to an embodiment of the present application.

[0038] Figure 8 is a structural schematic view of a folding chair according to an embodiment of the present application.

[0039] Reference signs: 1, front leg frame; 11, reinforcing member; 2, rear leg frame; 3, seat frame; 4, back frame; 5, bearing member; 6, armrest; 7, support rod; 71, mounting piece; 72, mounting member; 8, adjusting seat; 81, sliding member; 82, connecting member; 83, adjusting channel; 84, bayonet; 85, connecting seat; 9, hinged plate; 91, rotating member; 92, first hinged member; 921, first stress part; 93, second hinged member; 931, second stress part. DETAILED DESCRIPTION

[0040] The following will be described in detail with reference to the accompanying drawings. Figures 1-8 The present application will be described in further detail.

[0041] Embodiment 1

[0042] An embodiment of the present application discloses a folding chair. With reference to Figure 1 and Figure 2 , the folding chair comprises a front leg frame 1, a rear leg frame 2, a seat frame 3, a back frame 4, and two bearing members 5 respectively arranged on the seat frame 3 and the back frame 4; the seat frame 3 is located between the two side arms of the front leg frame 1, and the side arms of the seat frame 3 are hinged to the side arms of the front leg frame 1; the outer sides of the two side arms of the back frame 4 are hinged with armrests 6, the bottom surface of the armrest 6 and the end of the armrest 6 away from the back frame 4 are provided with connecting components, and the connecting components are connected with the end of the side arms of the rear leg frame 2 and the end of the side arms of the front leg frame 1 respectively. The side arms of the rear leg frame 2 are hinged with hinged components, and the hinged components are hinged with the back frame 4 and the seat frame 3 respectively; the connection between the side arms of the back frame 4 and the hinged components forms a first stress part 921, and the connection between the side arms of the seat frame 3 and the hinged components forms a second stress part 931; when the folding chair is unfolded, the side arms of the rear leg frame 2 support the first stress part 921 and the second stress part 931 to realize the stress of two points at the same time, compared with the stress of only one point, the stress area can be increased, and when the folding chair is folded, the hinged components can move the back frame 4 backward to shorten the folding length of the folding chair.

[0043] With reference to Figure 3 and Figure 4The support rod 7 is connected between the two side arms of the seat frame 3 and the two side arms of the back frame 4 through the mounting component, the support rod 7 on the seat frame 3 is arranged between the two side arms of the seat frame 3 and at the opening of the seat frame 3, so as to enhance the structural stability of the seat frame 3; the support rod 7 on the back frame 4 is arranged between the two side arms of the back frame 4 and at the top of the back frame 4, so as to enhance the structural stability of the back frame 4.

[0044] Since the mounting mode of the support rod 7 on the seat frame 3 is consistent with the mounting mode of the support rod 7 on the back frame 4, in the embodiment, the support rod 7 on the back frame 4 is taken as an example for illustration.

[0045] The opposite ends of the support rod 7 are respectively in abutment with the inner sides of the two side arms of the back frame 4, so as to support the two side arms of the back frame 4; thereby improving the overall stability of the back frame 4. The mounting component includes a mounting sheet 71 and a mounting piece 72, the mounting sheet 71 is fixed at the top of the side arm of the back frame 4, the middle part of the mounting sheet 71 is outwardly bent to form a clearance, the rod body of the mounting piece 72 passes through the clearance and is fixedly connected with the end of the support rod 7, the connection between the mounting piece 72 and the support rod 7 is located at the axis of the end of the support rod 7, the clearance limits the head of the mounting piece 72, so that the support rod 7 can rotate relative to the back frame 4. In the embodiment, the mounting piece 72 includes but is not limited to a rivet, a pin and a bolt.

[0046] The side arm of the seat frame 3 and located at the opening of the seat frame 3 is provided with an ergonomic curved surface (not shown in the figure), the existence of the ergonomic curved surface enables the seat frame 3 to accurately adapt to the natural curvature of the user's thigh rear muscle group; improves the comfort of the user during use; the middle part of the support rod 7 is bent to form an arc surface, the existence of the arc surface is used for accommodating the thigh rear muscle group of the user, and since the support rod 7 can rotate relative to the seat frame 3, when the folding chair is unfolded, the support rod 7 on the seat frame 3 can be rotated, so that the inner arc side of the arc surface of the support rod 7 faces upward, thereby accommodating the natural curvature of the thigh rear muscle group of the user.

[0047] In order to enhance the bending resistance of the bending parts of the front leg frame 1 and the rear leg frame 2, the two bending parts of the front leg frame 1 and the two bending parts of the rear leg frame 2 are fixedly connected with the obliquely arranged reinforcing pieces 11.

[0048] Referring to Figure 4 and Figure 5The connecting component includes an adjusting seat 8 fixedly connected to the bottom surface of the armrest 6 and located at the end of the armrest 6 away from the back frame 4, a sliding piece 81 fixedly connected to the end of the side arm of the rear leg frame 2, and a connecting piece 82 hingedly connected to the end of the side arm of the front leg frame 1, the connecting piece 82 being fixed to the side arm of the rear leg frame 2. The adjusting seat 8 has a U-shaped cross section with the opening facing downward, and adjusting channels 83 are formed in the two side surfaces of the adjusting seat 8 and have the same profile. A plurality of inclined clamping openings 84 are formed in the adjusting channels 83 and are distributed at equal intervals along the length direction of the side surfaces of the adjusting seat 8. The sliding piece 81 is slidably connected to the adjusting channels 83 and is clamped to the clamping openings 84. When the sliding piece 81 is clamped to different clamping openings 84, the inclination of the back frame 4 relative to the seat frame 3 is different, so as to adjust the inclination of the back frame 4 relative to the seat frame 3.

[0049] With reference to Figure 2 and Figure 6 The hinging component includes a hinging plate 9, in this embodiment, two hinging plates 9 are provided on the same hinging component, the two hinging plates 9 are symmetrically arranged, the side arm of the rear leg frame 2 is located between the two hinging plates 9, and the side arm of the rear leg frame 2 is hingedly connected to the bottom ends of the two hinging plates 9 through a rotating piece 91. A first hinging piece 92 is arranged at the end of the hinging plate 9 away from the rotating piece 91, and the side arm of the back frame 4 is hingedly connected to the two hinging plates 9 through the first hinging piece 92. A second hinging piece 93 is arranged on the hinging plate 9 between the rotating piece 91 and the first hinging piece 92, and the side arm of the seat frame 3 is hingedly connected to the two hinging plates 9 through the second hinging piece 93.

[0050] A first stress receiving part 921 is formed on the first hinging piece 92 and located between the two hinging plates 9, and a second stress receiving part 931 is formed on the second hinging piece 93 and located between the two hinging plates 9. In this embodiment, when the folding chair is unfolded, in order to enable the side arm of the rear leg frame 2 to simultaneously support the first stress receiving part 921 and the second stress receiving part 931, an arc-shaped section is formed on the hinging plate 9 and located between the first stress receiving part 921 and the second stress receiving part 931. Meanwhile, in order to buffer the first stress receiving part 921 and the second stress receiving part 931 to reduce stress concentration, a buffering piece (not shown in the figure) is sleeved on the first stress receiving part 921 and the second stress receiving part 931. In this embodiment, the buffering piece includes but is not limited to a rubber sleeve and a nylon sleeve.

[0051] With reference to Figure 2 and Figure 7When the folding chair needs to be folded, the two hands hold the support rods 7 on the seat frame 3 and the support rods 7 on the back frame 4 respectively, and move the two support rods 7 towards each other, and at the same time, the reverse movement of the hinged plate 9 is realized to make the first stress part 921 and the second stress part 931 away from the side arms of the rear leg frame 2, in this process, the back frame 4 gradually converges towards the seat frame 3, and the rear leg frame 2 also gradually converges towards the seat frame 3, and then the front leg frame 1 and the rear leg frame 2 are converged, and the folding of the folding chair is completed; in the process of folding the folding chair, with the reverse movement of the hinged plate 9, the first stress part 921 pulls the back frame 4 to move backward, so as to shorten the folding length of the folding chair.

[0052] The implementation principle of the embodiment one of the application is that when the folding chair is unfolded and the user uses the folding chair, the back of the user will lean on the bearing part 5 of the back frame 4, at this time, the bottom of the side arm of the back frame 4 will have a tendency to move towards the front leg frame 1, because the side arm of the rear leg frame 2 supports the first stress part 921, so that the back frame 4 can be stable; at the same time, the bearing part 5 on the seat frame 3 will bear the hips of the user, so that the seat frame 3 will have a tendency to move downward, because the side arm of the front leg frame 1, the side arm of the rear leg frame 2 and the side arm of the seat frame form a stable triangular structure, and the side arm of the rear leg frame 2 supports the second stress part 931, so as to enhance the bearing capacity of the seat frame 3 while making the seat frame 3 stable. The existence of the first stress part 921 and the second stress part 931 realizes the simultaneous stress of two points, compared with the stress of only one point, the stress area is increased, and the overall bearing capacity of the folding chair is enhanced.

[0053] After folding the folding chair, the hinged part can move the back frame 4 backward to shorten the folding length of the folding chair; this means that the length of the side arm of the back frame 4 can be made longer, so that the bearing part 5 arranged on the back frame 4 can be made longer to increase the effective support area, thereby supporting the upper back of the user, reducing the pressure concentration, and improving the comfort of the user when using. At the same time, the existence of the first stress part 921 will lift the back frame 4 to increase the distance between the bottom of the side arm of the back frame 4 and the seat frame 3, so as to realize the lifting of the back frame 4, which can also increase the effective support area of the bearing part 5 on the back frame 4 to improve the comfort of the user when using.

[0054] Embodiment 2

[0055] Reference Figure 8The difference between the second embodiment and the first embodiment is that the connecting components are different. In the second embodiment, the connecting components include a connecting seat 85 fixedly connected to the bottom surface of the armrest 6, the end of the connecting seat 85 close to the backrest frame 4 is hingedly connected to the end of the side arm of the rear leg frame 2, and the end of the connecting seat 85 away from the backrest frame 4 is hingedly connected to the end of the side arm of the front leg frame 1.

[0056] Embodiment 3

[0057] With reference to Figure 2 and Figure 6 The difference between the third embodiment and the above embodiments is that the hinged plate 9 is different. In the third embodiment, the hinged plate 9 is a straight strip plate (not shown in the figure), the length of the hinged plate 9 is extended so that the distance between the first hinged part 92 and the second hinged part 93 is long enough to enable the side arm of the rear leg frame 2 to support the first stress part 921 and the second stress part 931 at the same time when the folding chair is unfolded.

[0058] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A folding chair, characterized by: The chair comprises a front leg frame (1), a rear leg frame (2), a seat frame (3), a back frame (4), and two carriers (5) arranged on the seat frame (3) and the back frame (4) respectively, the seat frame (3) is hinged to the front leg frame (1), two side arms of the back frame (4) are hinged to armrests (6) respectively, the armrests (6) are provided with connecting components connected to the rear leg frame (2) and the front leg frame (1) respectively, the side arms of the rear leg frame (2) are hinged to hinge components, the hinge components are hinged to the back frame (4) and the seat frame (3) respectively, the side arms of the back frame (4) are connected to the hinge components to form first stress parts (921), the side arms of the seat frame (3) are connected to the hinge components to form second stress parts (931), and the side arms of the rear leg frame (2) support the first stress parts (921) and the second stress parts (931) when unfolded.

2. A folding chair according to claim 1, characterized in that: The hinge components comprise a hinge plate (9), the side arms of the rear leg frame (2) are hinged to the bottom end of the hinge plate (9) through a rotating piece (91), the hinge plate (9) is provided with a first hinge piece (92) at the end away from the rotating piece (91), the side arms of the back frame (4) are hinged to the hinge plate (9) through the first hinge piece (92), and the hinge plate (9) is provided with a second hinge piece (93) between the rotating piece (91) and the first hinge piece (92), the side arms of the seat frame (3) are hinged to the hinge plate (9) through the second hinge piece (93).

3. A folding chair according to claim 2, wherein: An arc-shaped section is formed on the hinge plate (9) and located between the first stress parts (921) and the second stress parts (931).

4. The folding chair of claim 2, wherein: The hinge plate (9) is a straight strip plate.

5. The folding chair of claim 2, wherein: Two hinge plates (9) are arranged on the same hinge component, and the side arms of the rear leg frame (2) are located between the two hinge plates (9).

6. The folding chair of claim 1, wherein: The first stress parts (921) and the second stress parts (931) are both provided with buffer pieces.

7. The folding chair of claim 1, wherein: The connecting components comprise an adjusting seat (8) fixedly connected to the bottom surface of the armrest (6) and located at the end of the armrest (6) away from the back frame (4), a sliding piece (81) fixedly connected to the end of the side arm of the rear leg frame (2), and a connecting piece (82) hinged to the end of the side arm of the front leg frame (1), the connecting piece (82) is fixed to the side arm of the rear leg frame (2), the side surface of the adjusting seat (8) is provided with an adjusting channel (83), a plurality of obliquely arranged and equidistantly distributed clamping ports (84) are formed on the adjusting channel (83), the sliding piece (81) is in sliding connection with the adjusting channel (83), and the sliding piece (81) is clamped with the clamping ports (84).

8. The folding chair of claim 1, wherein: The connecting components comprise a connecting seat (85) fixedly connected to the bottom surface of the armrest (6), one end of the connecting seat (85) close to the back frame (4) is hinged to the end of the side arm of the rear leg frame (2), and the other end of the connecting seat (85) away from the back frame (4) is hinged to the end of the side arm of the front leg frame (1).

9. The folding chair of claim 1, wherein: Supporting rods (7) for reinforcing the structural stability are connected between the two side arms of the seat frame (3) and between the two side arms of the back frame (4) through mounting components.

10. The folding chair of claim 1, wherein: The two bending parts of the front leg frame (1) and the two bending parts of the rear leg frame (2) are provided with reinforcing pieces (11).

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