Double butterfly chair

Abstract

The utility model relates to a double butterfly chair which comprises a sitting and leaning cloth cover and a chair frame, the chair frame is provided with four vertical faces and comprises a front support, a rear support and side supports connected with the front support and the rear support. The sitting and leaning cloth cover is hung on the upper edges of the front and rear brackets; wherein the front support and the rear support are respectively provided with two groups of rod pieces which are hinged in a crossed manner, the middle support is connected between the hinged positions of the end parts of the two groups of rod pieces in the front support and the rear support, and the side support consisting of the middle support and the group of rod pieces which are hinged in the crossed manner is jointly connected with the front support and the rear support and is ingeniously divided into two sitting and leaning spaces.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of folding chair, especially relates to a double butterfly chair. BACKGROUND

[0002] Butterfly chair is a specific style in folding chair classification, simulates the modeling effect of butterfly double wings according to the different seat cover modeling, and satisfies different aesthetic needs. For example, CN02270597.X discloses a butterfly-shaped chair frame which is formed by a plurality of pipe fittings which are hingedly connected to each other, and comprises a first back body, a second back body, a first seat body and a second seat body. The pipe fittings are identical in structure, and the two ends of each pipe fitting are pressed into a twisted arc shape to increase the bending resistance of the pipe fitting. The adjacent pipe fittings are connected by hinges between the flat bodies, and the two pipe fittings in the same plane are hingedly connected at the middle portions to form a complete support body. The adjacent surfaces are directly connected by rivets without the need for additional bridging pieces.

[0003] CN201220331922.7 discloses a folding chair which is composed of a pair of butterfly frames and a cover, each butterfly frame has one long wing and one short wing, and the pair of butterfly frames are combined with each other in an interlaced manner. The two long wings and the two short wings are arranged on opposite sides. The adjacent edges of the two long wings are interlaced, and the adjacent edges of the two short wings are interlaced. Each pair of interlaced edges is connected by a connecting ring. The butterfly frame is composed of four pipe fittings and connecting pieces. Supporting legs are arranged at the root connection of the butterfly frame. The two ends of the cover are respectively sleeved on the wing tips of the two long wings and the wing tips of the two short wings. The adjacent surfaces are connected by the connecting ring, so that the end portions of the pipe fittings do not need to be processed.

[0004] As described above, the folding chair frame has four vertical surfaces, each vertical surface is composed of two cross-hinged rod members, and the end portions of the rod members of the adjacent vertical surfaces are hingedly connected or connected by a bridging piece to form the whole chair frame. The cover is suspended on the cabinet frame with low front and high back, and forms a seat and backrest connected structure.

[0005] How to provide a solution for two people to use on the basis of a single butterfly chair, which is the object of the present research. SUMMARY

[0006] The utility model aims at designing a double butterfly chair whose front and rear vertical surfaces are composed of two groups of cross-hinged rod members.

[0007] The utility model discloses a two-person butterfly chair, including seat cloth cover and chair frame, the chair frame has four vertical surfaces, including left and right vertical surface corresponding or symmetrical side support, the front support of front vertical surface and the rear support of rear vertical surface, the front support is lower than the rear support, and is formed in an entirety that can be folded and opened by two side supports, the seat cloth cover is hung in the upper edge of front and rear supports, its characterized in that: the front support and the rear support all have two groups of cross hinged link members, and the two groups of link members in the front and rear supports are hinged in the middle support, and the side support is formed by the middle support and a group of cross hinged link members, and the front support and the rear support are jointly associated.

[0008] The middle support includes upper link member, middle link member and lower link member, the two ends of the middle link member are hingedly connected to the upper hinge point in the middle of the front support and the lower hinge point in the middle of the rear support, one end of the upper link member is hingedly connected to the upper hinge point in the middle of the rear support, and the other end is hingedly connected to the middle of the middle link member, the upper end of the lower link member is hingedly connected to a sliding sleeve, the sliding sleeve is sleeved on the middle link member, and the lower end of the lower link member is hingedly connected to a hinge assembly, and the hinge assembly is hingedly connected to the corresponding end of the two link members of the front support.

[0009] The hinge assembly includes a hinge shaft and two corresponding hinge arms, the two hinge arms are hingedly connected to the two link members of the front support, and the lower end of the lower link member is hingedly connected to the hinge shaft through a connecting piece.

[0010] The middle link member is provided with upper and lower limit points above the hinge point of the upper link member, the sliding stroke of the sliding sleeve is restricted by the upper and lower limit points, the sliding sleeve is abutted on the upper limit point when the chair frame is opened to the position, and the two hinge arms of the hinge assembly are retracted by the lower limit point during the folding process.

[0011] The shaft end of the two hinge arms of the hinge assembly has an enlarged round head, the round head and the end of the hinge arm are in the opened position of the hinge assembly, and three-point ground support is formed.

[0012] The middle support includes upper link member, middle link member and two lower link members, the two ends of the middle link member are hingedly connected to the upper hinge point in the middle of the front support and the lower hinge point in the middle of the rear support, one end of the upper link member is hingedly connected to the upper hinge point in the middle of the rear support, and the other end is hingedly connected to the middle of the middle link member, the upper end of the two lower link members is hingedly connected to a sliding sleeve, the sliding sleeve is sleeved on the middle link member, and the lower end of the two lower link members is hingedly connected to the corresponding end of the two link members of the front support.

[0013] The two lower link members of the middle support are hingedly connected to the sliding sleeve and the two link members of the front support through universal joints or ball joints.

[0014] The middle rod member is provided with upper and lower limiting points above the upper rod member hinge point, the sliding stroke of the sliding sleeve is limited by the upper and lower limiting points, the sliding sleeve is in contact with the upper limiting point when the chair frame is opened to the position, and the lower rod member is driven by the lower limiting point during the folding process and the two hinge arms of the hinge assembly are pulled together.

[0015] The sitting cloth cover is provided with six corresponding open cloth bags at the six upper hinge points in the front and rear supports.

[0016] The utility model has the characteristics of unique concept, clever structure, good correlation, smooth unfolding and folding, stable support, etc. In particular, between the two groups of supports of the front and rear vertical surfaces, an intermediate support is arranged to form a connection and strengthen the support of the middle part. The sitting cloth cover is hung and supported by the upper edge of the intermediate support, and two sitting spaces are divided and independently supported. Whether a single person or two people sit, the overall structure is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0017] The application will be further described below in combination with specific examples:

[0018] Figure 1 Figure 2 is a schematic diagram of a double butterfly chair

[0019] Figure 2 Figure 3 is a schematic diagram of the unfolded state of a double butterfly chair frame

[0020] Figure 3 Figure 4 is a schematic diagram of the folded state of a double butterfly chair frame

[0021] Figure 4 Figure 5 is a schematic diagram of the unfolding of the front support and the intermediate support

[0022] Figure 5 Figure 6 is a schematic diagram of the folding of the front support and the intermediate support

[0023] Figure 6 Figure 7 is a schematic diagram of a double butterfly chair frame

[0024] Figure 7 Figure 8 is Figure 6 Figure 9 is a schematic diagram of the unfolding of the middle front support and the intermediate support

[0025] Figure 8 Figure 10 is Figure 6 Figure 11 is a schematic diagram of the folding of the middle front support and the intermediate support

[0026] Wherein

[0027] 100 - sitting cloth cover; 101 - open cloth bag;

[0028] 200 - chair frame; 201 - rod member;

[0029] 1 - side support;

[0030] 2 - front support; 2A - upper hinge point in the middle of the front support;

[0031] 3 - rear support; 3A - upper hinge point in the middle of the rear support; 3B - lower hinge point in the middle of the rear support;

[0032] 4 - middle support; 41 - upper rod; 42 - middle rod; 421 - upper limit point; 422 - lower limit point;

[0033] 43 - lower rod; 44 - sliding sleeve; 45 - hinge assembly; 451 - hinge shaft; 452 - hinge arm;

[0034] 453 - knob;

[0035] 5 - adapter plate;

[0036] 6 - ball joint; DETAILED DESCRIPTION:

[0037] Referring to Figures 1 to 5 , the double butterfly chair includes a seat cloth 100 and a chair frame 200. The chair frame 200 has four vertical surfaces, including side supports 1 corresponding or symmetrically arranged on the left and right vertical surfaces, a front support 2 on the front vertical surface, and a rear support 3 on the rear vertical surface. The front support 2 is lower than the rear support 3, forming a low front seat and a high rear backrest, and being associated by the two side supports 1 to form an overall body that can be folded and unfolded. More specifically, each vertical surface contains a set of two cross-hinged rods 201, forming an expandable and foldable chair frame overall body. The seat cloth 100 is suspended from the upper edges of the front support 2 and the rear support 3, constituting a suspension scheme of a seat and a backrest connected in one body, which is also the basic shape of the existing butterfly chair, meeting the needs of one person using.

[0038] In the design, the front support 2 and the rear support 3 each have two sets of cross-hinged rods 201. Between the hinge points of the two sets of rods 201 in the front and rear supports, there is a middle support 4 associated. The side support 1 composed of the middle support 4 and a set of cross-hinged rods 201 is associated with the front support 2 and the rear support 3, forming two relatively independent spaces on the left and right, which are associated to achieve independent support and ensure smooth operation of unfolding and folding. The middle support 4 has two structures, as shown in the following specific examples.

[0039] Example 1:

[0040] As Figures 2 to 5, the intermediate support 4 comprises an upper rod member 41, a middle rod member 42 and a lower rod member 43, the middle rod member 42 is hingedly connected at its two ends to the upper hinge point 2A in the middle of the front support and the lower hinge point 3B in the middle of the rear support; the upper rod member 41 is hingedly connected at one end to the upper hinge point 3A in the middle of the rear support and at the other end to the middle of the middle rod member 42; the upper end of the lower rod member 43 is hingedly connected to a sliding sleeve 44, the sliding sleeve 44 is sleeved on the middle rod member 42, and the lower end of the lower rod member 43 is hingedly connected to a hinge assembly 45, which is hingedly connected to the corresponding end of the two rod members 201 of the front support 2 through the hinge assembly 45, so that the ends of the two cross-hinged rod members 201 of the front support 2 are associated and constrained.

[0041] Further, the hinge assembly 45 comprises a hinge shaft 451 and two corresponding hinge arms 452, the ends of the two hinge arms 452 are hingedly connected to the ends of the two rod members of the front support 2; the lower end of the lower rod member 43 is hingedly connected to the hinge shaft 451 through the adapter plate 5. More specifically, the shaft end of the hinge arm 452 has an enlarged round head 453, the round head 453 and the end of the hinge arm 452 are opened to the position, forming a three-point grounding support, and the three points can directly transmit the force of the two rod members 201 and the lower rod member 43 to the ground. In addition, the hinging of the rod members in the intermediate support 4 to the upper and lower hinge points of the front and rear supports is completed by means of the adapter plate 5, which has the freedom of vertical two axes, meeting the unfolding and folding operation. The above-mentioned hinge assembly 45, the two hinge arms 452 can be reverse assembled as the same part, only one mold is needed.

[0042] Further, the middle rod member 42 is provided with an upper limiting point 421 and a lower limiting point 422 above the hinge point of the hinged upper rod member 41, the sliding stroke of the sliding sleeve 44 is constrained by the upper limiting point 421 and the lower limiting point 422, the sliding sleeve 44 is abutted on the upper limiting point 421 when the chair frame 200 is opened to the position, transmitting the gravity to the lower rod member 43; the folding process is driven by the lower limiting point 422 to pull the two hinge arms 452 of the hinge assembly to fold.

[0043] The seat cloth cover 100 is hingedly connected to the six upper hinge points in the front support 2 and the rear support 3, and each is provided with a corresponding open cloth bag 101, the dashed line part in the figure, the open cloth bag 101 is directly sleeved on the six upper hinge points, forming two independent seat areas.

[0044] Embodiment two:

[0045] Reference Figure 6 , Figure 7 and Figure 8, intermediate support 4, including upper bar 41, middle bar 42 and two lower bars 43, the structure is basically the same as the previous example, but using two lower bars 43 instead of hinge assembly 45, forming equivalent deployable and foldable structure. Details as follows:

[0046] The two ends of middle bar 42 are hingedly connected to upper hinge point 2A in the middle of front support and lower hinge point 3B in the middle of rear support; one end of upper bar 41 is hingedly connected to upper hinge point 3A in the middle of rear support, and the other end is hingedly connected to the middle of middle bar 42; the upper end of two lower bars 43 is hingedly connected to a sliding sleeve 44, which is sleeved on middle bar 42, and the lower end of two lower bars 43 is hingedly connected to the end of corresponding bar 201 of two sets of bars of front support.

[0047] More specifically, the two ends of two lower bars 43 in intermediate support 4 are hingedly connected to sliding sleeve 44 and the ends of two bars 201 of front support through universal joint or ball joint 6, meeting the change of angle during deployment and folding, and other structures and methods of use are the same as the previous example.

Claims

1. A double butterfly chair, comprising a seat cloth cover (100) and a chair frame (200); the chair frame (200) has four vertical surfaces, including left and right vertical surface corresponding or symmetrical side supports (1), front vertical surface front support (2) and rear vertical surface rear support (3), the front support (2) is lower than the rear support (3), and is associated by the two side supports (1) to form an integral body capable of being folded and opened, and the seat cloth cover (100) is hung on the upper edge of the front support (2) and the rear support (3); characterized in that: The front support (2) and the rear support (3) each have two sets of cross-linked rods (201), and between the end joints of the two sets of rods in the front and rear supports, an intermediate support (4) is associated, and a side support (1) composed of the intermediate support (4) and a set of cross-linked rods (201) is associated with the front support (2) and the rear support (3) together.

2. A double butterfly chair according to claim 1, characterized in that: The intermediate support (4) comprises an upper rod (41), a middle rod (42) and a lower rod (43), the two ends of the middle rod (42) are correspondingly hinged at an upper hinge point (2A) in the middle of the front support and a lower hinge point (3B) in the middle of the rear support, one end of the upper rod (41) is hinged at an upper hinge point (3A) in the middle of the rear support, the other end is hinged at the middle of the middle rod (42), and the upper end of the lower rod (43) is hinged with a sliding sleeve (44) which is sleeved on the middle rod (42), and the lower end of the lower rod (43) is hinged with a hinge assembly (45) which is hinged with the corresponding ends of the two rods (201) of the two sets of rods of the front support (2).

3. A double butterfly chair according to claim 2, characterized in that: The hinge assembly (45) comprises a hinge shaft (451) and two corresponding hinge arms (452), the two hinge arms (452) are hinged at the ends of the two rods in the front support (2), and the lower end of the lower rod (43) is hinged on the hinge shaft (451) through a connecting piece (5).

4. A double butterfly chair according to claim 2 or 3, characterized in that: The middle rod (42) is provided with an upper limiting point (421) and a lower limiting point (422) above the hinge point of the upper rod (41), the sliding stroke of the sliding sleeve (44) is restricted by the upper limiting point (421) and the lower limiting point (422), the sliding sleeve (44) is abutted against the upper limiting point (421) when the chair frame (200) is opened to the position, and the lower limiting point (422) drives the lower rod (43) and pulls the two hinge arms (452) of the hinge assembly to fold during the folding process.

5. A double butterfly chair according to claim 2 or 3, characterized in that: The shaft end of the two hinge arms (452) of the hinge assembly has an enlarged round head (453), the round head (453) and the end of the hinge arm (452) form a three-point landing support when the hinge assembly (45) is opened to the position.

6. A double butterfly chair according to claim 1, characterized in that: The intermediate support (4) comprises an upper rod (41), a middle rod (42) and two lower rods (43), the two ends of the middle rod (42) are correspondingly hinged at an upper hinge point (2A) in the middle of the front support and a lower hinge point (3B) in the middle of the rear support, one end of the upper rod (41) is hinged at an upper hinge point (3A) in the middle of the rear support, the other end is hinged at the middle of the middle rod (42), and the upper ends of the two lower rods (43) are hinged with a sliding sleeve (44) which is sleeved on the middle rod (42), and the lower ends of the two lower rods (43) are hinged with the corresponding ends of the two rods (201) of the two sets of rods of the front support (2).

7. A double butterfly chair according to claim 6, characterized in that: The two lower rods (43) of the intermediate support are hinged at the two ends with the sliding sleeve (44) and the two rods (201) of the front support through universal joints or ball joints (6).

8. A double butterfly chair according to claim 6 or 7, characterized in that: The middle rod (42) is provided with an upper limiting point (421) and a lower limiting point (422) above the upper rod (41) hinge point, the sliding stroke of the sliding sleeve (44) is constrained by the upper limiting point (421) and the lower limiting point (422), the chair frame (200) is opened to the position, the sliding sleeve (44) is in contact with the upper limiting point (421), and the folding process drives the lower rod (43) by the lower limiting point (422) and pulls the two hinge arms (452) of the hinge assembly (45) to fold.

9. A double butterfly chair according to claim 1, 2 or 6, characterized in that: The seat cloth cover (100) is sewn with corresponding open cloth bags (101) at six upper hinge points in the front support (2) and the rear support (3). The open cloth bags (101) are directly sleeved on the six upper hinge points.

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