A double-degree-of-freedom folding electric bed

Abstract

The present invention discloses a double-freedom folding electric bed, which comprises: a first bed board and a second bed board which are respectively formed by splicing a plurality of bed boards and can be turned over; a bed frame for fixing the bed board, comprising at least two first bed frames and a second bed frame which are folded mutually, and a driving device for driving the bed board; and a connecting member for foldably connecting the first bed frame and the second bed frame; the connecting member comprises a rotating member and a fixing member for fixing the rotating member, the rotating shaft movably connects the fixing member with the rotating member at both ends of the lower edge of the rotating member, the rotating member and the fixing member can rotate relative to each other along the rotating shaft, the upper and lower parts of the stop member respectively form an upper edge of the stop member and a lower edge of the stop member, and an arc groove is formed between the upper edge of the stop member and the lower edge of the stop member. The present invention can protect the bed frame from scratches during the folding process, and is easier to fold at the same time. The stop design can not only limit the degree of freedom of folding, but also improve the supporting performance of the bed frame.

Description

Technical Field

[0001] The present invention relates to an electric bed, in particular to a double-degree-of-freedom folding electric bed. In particular, the present invention further provides a connecting piece for connecting the folding bed. Background Art

[0002] With the progress of society, more and more appliances that can facilitate people's daily lives have emerged. Folding beds, as one of the essential appliances in people's daily lives, can reduce labor intensity during transportation and can be folded for storage to save space. Currently, folding beds have been widely used in daily homes, hospital care, hotels and other places to meet the needs of lying down.

[0003] An electric bed is a bed frame that can electrically control the height of the head or foot of the bed board and freely adjust the degree of curvature of the bed board. It is divided into two categories: frame type and bed board type. The frame type is called a European electric bed, while the bed board type is called an American electric bed. Existing electric beds are usually of an integral design, that is, a large bed frame has many mechanical and electrical components connected by wires and cables fixedly installed inside it, and the bed frame is also equipped with detachable legs. This type of integral electric bed is not only complex in structure, but also large in size and heavy in weight. For this reason, some people have invented folding electric beds, such as patent number 201310129544.3, which discloses a folding five-curve electric bed. The electric bed is hinged between two bed frames by a movable shaft, and legs are provided at the four corners and the central bottom of the bed frame. The bed body can be folded together for easy transportation. Transport, storage and use, and the utility model patent with patent number 201720593297.6 discloses a new type of electric folding bed, which changes the entire bed frame into a left and right bed frame docking mode, and the left and right bed frames are connected and fixed by a rotation limit mechanism, and the utility model patent with patent number 201621334342.8 discloses a foldable electric bed, including a head bed frame and a leg bed frame. Although it overcomes the defects of traditional electric beds in packaging, transportation and handling difficulties, and saves packaging and transportation costs, it is very easy to cause damage to the bed frame during the folding process.

[0004] However, the folding beds and electric folding beds currently on the market still have the following problems:

[0005] First, the partial double-degree-of-freedom folding design has no unlimited position design during the folding process, and also has no unlimited position design after unfolding, which makes it easy to scratch the frame during the folding process, and at least two bed legs need to be added in the middle for normal use. Installing more bed legs increases the overall weight of the bed.

[0006] Second, for single-degree-of-freedom folding products, the bed legs must be installed after the entire bed is unfolded for normal use. Summary of the invention

[0007] In order to solve the problems and shortcomings existing in the prior art, the present invention provides a double-degree-of-freedom folding electric bed with a double-degree-of-freedom folding function. A limit setting is set during the folding process to prevent damage to the frame during the folding process. The design of the bed foot installation position is increased in the folding part, so that the bed feet can be installed between the frame and parts at the same time, thereby greatly improving the supporting strength of the bed feet, reducing the number of bed legs, and obtaining the maximum mechanical support effect.

[0008] In order to solve the above technical problems, the present invention provides a double-degree-of-freedom folding electric bed, which comprises: a bed board, comprising a first bed board and a second bed board which are flippable and are respectively formed by splicing a plurality of bed boards;

[0009] A bed frame for fixing a bed board, comprising at least two mutually folded first and second bed frames, and a driving device for driving the bed board; and

[0010] A connecting piece for foldably connecting a first bed frame and a second bed frame.

[0011] Furthermore, the dual-freedom folding electric bed also includes bed legs, which can be installed on the bed frame or can be foldable.

[0012] Furthermore, a bed leg support is provided on the bed frame near the connecting piece, and the bed leg support is also fixed to the bed board. The end surface of the bed leg support is provided with a fixing hole for connecting the bed legs, and the bed leg support can be connected to the bed legs as needed.

[0013] Furthermore, the connecting member includes a rotating member, a fixing member fixed on the bed frame for connecting to the rotating member, and a stop member fixed on the fixing member for limiting rotation. A rotating shaft movably connects the fixing member and the rotating member at both ends of the upper edge of the rotating member, so that the rotating member and the fixed member can rotate relative to each other along the rotating axis. The stop members are distributed on both horizontal sides of the rotating member and are provided with an arc groove near one side edge of the rotating member to accommodate the rotation of the rotating member.

[0014] Furthermore, the stop member has an upper portion and a lower portion formed on one side of the rotating member to form an upper stop member edge and a lower stop member edge respectively, and an arc groove is formed between the upper stop member edge and the lower stop member edge to accommodate the rotation of the rotating member.

[0015] Furthermore, the rotating member has two rounded corners formed on its upper edge, and when rotating and folding, the rounded corners slide in the arc groove.

[0016] Furthermore, the rotating shaft movably connects the rotating member to two symmetrically arranged fixing members respectively, and the fastener passes through the through holes on the fixing member and the stop member to connect the fixing member and the stop member.

[0017] During the rotational folding process: when in the folded state, the upper edge of the stop member simultaneously clamps the upper edge of the rotating member to prevent further rotational folding; when in the flattened state, the lower edge of the stop member simultaneously clamps the lower edge of the rotating member to prevent further rotational unfolding.

[0018] When the first bed frame and the second bed frame are at an unfolded vertical angle, the upper edge of the stopper on one of the fixed members clamps the upper edge of one side of the rotating member to prevent the rotating member from continuing to rotate. At this time, the rotating member continues to rotate through the arc groove on the other fixed member until it rotates to a flattened state.

[0019] When in the flattened state, the stopper can effectively prevent the first bed frame and the second bed frame from further folding downward, and the stuck first bed frame and the second bed frame can provide effective support. Preferably, at this time, only the bed legs need to be installed on the bed leg support members on one side to complete the middle position support.

[0020] Another object of the present invention is to provide a folding connection member suitable for a folding bed, which comprises: a rotating member and a fixing member for connecting the rotating member;

[0021] A rotating shaft movably connects the fixed part and the rotating part at both ends of the upper edge of the rotating part;

[0022] A stopper fixed on the fixing member is used to limit the rotation of the rotating member.

[0023] The rotating member and the fixed member can rotate relative to each other along the rotating axis, the stop members are distributed on both sides of the rotating member in the horizontal direction and an arc groove for accommodating the rotation of the rotating member is provided on the edge of one side of the rotating member, and the two ends of the arc groove are limit points for limiting the rotation of the rotating member.

[0024] The present invention ingeniously utilizes the stopper to limit the position of the rotating member when the rotating member rotates, and effectively controls the rotation range of the rotating member. Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0025] First, when the dual-degree-of-freedom is in the folding process, when the folding reaches the single-degree-of-freedom vertical position, the limited position design prevents further rotation, thereby protecting the frame from scratches and making it easier to fold;

[0026] Second, when the dual degrees of freedom are in a flattened state, the front and rear frames have stop designs to limit the degrees of freedom and increase the support strength, so that it can be placed on a flat surface for use after unfolding;

[0027] Third, the design of the bed foot support at the middle folding position allows the frame and parts to be overlapped during the use of the bed foot, increasing the support effect of the bed foot while reducing the weight of the frame;

[0028] Fourthly, when the folding connector is in the folded state, it does not protrude from the plane of the bed frame, so that a normal folding bed of the same height is lowered after folding, which is convenient for packaging, transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] It should be understood that the following drawings are not true to scale, but are merely simplified diagrams for illustrating various preferred embodiments of the technical solutions of the present invention.

[0031] The design features disclosed in the present invention, such as size, orientation, positioning and shape, are determined according to specific applications and use environments.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of an electric bed in an unfolded state of the present invention;

[0033] Figure 2 for Figure 1 A schematic diagram of the connecting member in the expanded state;

[0034] Figure 3 This is a schematic diagram of the state where the connecting piece is unfolded to 90 degrees;

[0035] Figure 4 This is a structural schematic diagram of an embodiment of an electric bed in a folded state according to the present invention;

[0036] Figure 5 for Figure 4 State diagram of the connector when in state;

[0037] Figure 6 It is a structural schematic diagram of an embodiment of a bed leg support of the present invention.

[0038] In the figure: 1-first bed board, 2-connecting member, 3-first bed frame, 4-second bed frame, 5-bed leg support frame, 10-hinge, 11-second bed board, 21-fixing member, 22-stop member, 24-stop member, 25-fixing member, 51-bed leg fixing hole, 52-bed board fixing hole, 220-through hole, 221-arc groove, 222-stop member lower edge, 223-stop member upper edge, 23-rotating member, 230-rotating axis, 231-upper edge, 232-lower edge. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings. It should be noted that the terms "outer side", "inner side", "side", "one side", "upper edge", "lower edge" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or parts referred to must have a specific position or be constructed in a specific position, and therefore cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a non-detachable connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figure 1 A double-degree-of-freedom folding electric bed is shown, comprising:

[0042] The bed board includes a first bed board 1 and a second bed board 11 which are respectively formed by splicing a plurality of bed boards and are flippable;

[0043] A bed frame for fixing a bed board, comprising at least two first bed frames 3 and second bed frames 4 folded mutually, and a driving device (not shown in the figure) for driving the bed board; and

[0044] A connecting piece 2 for folding and connecting the first bed frame 3 and the second bed frame 4 .

[0045] Furthermore, the first bed board 1 is composed of two bed boards connected by a hinge 10, and the second bed board 11 is composed of three bed boards connected to each other by hinges. The hinge 10 can also be other fixed connecting parts that can connect two solids and allow relative rotation between the two solid parts.

[0046] Furthermore, a bed leg support 5 is provided on the second bed frame 4 near the connecting member 2, and the bed leg support 5 is also fixed on the second bed board 11. The end surface of the bed leg support 5 is provided with a bed leg fixing hole 51 for connecting the bed legs. Figure 6 As shown, the bed leg support 5 can be connected to the bed legs as needed, and at least one bed leg support 5 is connected to a bed leg.

[0047] Among them, there are two bed leg supports 5, which are respectively arranged on the outside of the second bed frame 4 near the connecting member 2. One side of the bed leg support 5 is connected to the second bed frame 4 by screws, and the other side is connected to the second bed board 11 through the bed board fixing hole 52.

[0048] Preferably, a groove capable of accommodating the second bed frame is provided on the surface engaging with the second bed frame, so that the bed leg support frame fits more closely with the bed frame.

[0049] Optionally, the bed leg support 5 may also be arranged on the inner side of the second bed frame 4 close to the connecting member 2, and the bed leg support 5 may also be arranged on the first bed board 1 and the first bed frame 3, and the details are not repeated here.

[0050] Optionally, the bed leg support 5 can also be arranged at the folding position of the first bed frame 1 and the second bed frame 11. The installation direction is not limited as long as it plays the role of supporting the middle part.

[0051] Furthermore, the bed frame has four corner fixing holes (not shown) connected with bed legs. In addition to the four bed legs, the bed legs can be installed on the bed leg support as needed, and at least one bed leg can be installed on the bed leg support, or no bed leg can be installed.

[0052] It should be noted that the bed legs can be directly installed on the bed frame, or foldable bed legs can be used.

[0053] like Figure 2 , Figure 3 As shown, the connecting member includes a rotating member 23 and a fixing member 21 and a fixing member 25 for connecting the rotating member 23. The fixing member 21 is fixed on the bed frame 3, and the fixing member 25 is fixed on the bed frame 4. A rotating shaft 230 movably connects the fixing member 21 and the fixing member 25 with the rotating member 23 at both ends of the upper edge 231 of the rotating member 23. The rotating member 23 and the fixing member 21 and the fixing member 25 can rotate relative to each other along the rotating shaft 230. The fixing member 21 and the fixing member 25 are also respectively fixed with a stop member 22 and a stop member 24 for rotation limitation. The stop member 22 and the stop member 24 are distributed on both sides of the rotating member 23 in the horizontal direction and are provided with an arc groove 221 for accommodating the rotation of the rotating member on the edge of one side close to the rotating member 23.

[0054] Furthermore, the stop member has a stop member lower edge 222 and a stop member upper edge 223 formed on the upper and lower parts of the stop member on one side of the rotating member 23, respectively, and an arc groove 221 is formed between the stop member upper edge 223 and the stop member lower edge 222 to accommodate the rotation of the rotating member.

[0055] Furthermore, there are two rotating shafts, and the rotating member 23 is movably connected to two symmetrically arranged fixing members 21 and fixing members 25 respectively through the rotating shaft 230. The fasteners (not shown in the figure) pass through the fixing members 21 and fixing members 25 and the through holes 220 on the stop members 22 and the stop members 24 to connect the fixing members and the stop members, wherein the fasteners can be screws or bolts. Of course, the fixing members 21 and the stop members 22 can also be riveted together.

[0056] Among them, the rotating member 23 and the fixed member 21 and the fixed member 5 can rotate relative to each other. Due to the existence of two rotating axes 230, when rotating and folding, it can be folded from the first bed frame 3 to the second bed frame 4, or from the second bed frame 4 to the first bed frame, realizing double-degree-of-freedom folding.

[0057] It should be known that the spacing and position between the two rotating shafts 230 can be adjusted as needed, and the rotating shaft 230 can be a pin shaft, or a rotatable shaft such as a gasket rotating shaft, a spindle, a lead screw, etc.

[0058] Furthermore, both ends of the lower edge of the rotating member 23 are rounded, and when rotating and folding, the rounded corners slide along the arc groove 221 to complete the folding action. A straight line surface is preferably used between the two rounded corners so that the upper edge 223 of the stop member and the upper edge of the rotating member can be better positioned when the folding is completed.

[0059] Furthermore, the rotating part is in a triangular shape as a whole, and three corners are designed to be rounded. Optionally, an equilateral triangle design is adopted. Of course, the whole part can also adopt a trapezoidal structure, and a rounded design is adopted at the intersection of the edges. The size of the rounded radius is determined according to needs.

[0060] like Figure 4 , Figure 5 As shown, during the rotation and folding process, the rounded corners at both ends of the upper edge 231 of the rotating member 23 rotate along the arc groove 221 on the stop member 22, so that the first bed frame 3 is folded toward the second bed frame 4. When rotated to the folded state, the upper edge 223 of the stop member prevents the upper edge 231 of the rotating member 23 from rotating. On the contrary, when the electric bed needs to be unfolded, the first bed frame 3 is pulled to rotate the rotating member 23, and the lower edge 232 of the rotating member 23 rotates along the arc groove 221 on the stop member 22. When rotated to the flattened state, the lower edge 222 of the stop member prevents the lower edge 232 of the rotating member 23 from continuing to rotate, thereby completing the unfolding of the electric bed.

[0061] Wherein, the upper edge and the lower edge of the stop member are stop points for limiting the rotation of the rotating member.

[0062] Among them, when the first bed frame and the second bed frame are at an unfolded vertical angle, the lower edge 222 of the stop member on the fixed member 21 clamps one side of the lower edge of the rotating member 23 to prevent the rotating member 23 from continuing to rotate. At this time, the rounded corner (not marked in the figure) on the upper edge 231 of the rotating member continues to rotate along the arc groove 221 on the fixed member 25 until it rotates to a flattened state.

[0063] When in the flattened state, the stopper can effectively prevent the first bed frame and the second bed frame from further folding downward, and the stuck first bed frame and the second bed frame can provide effective support so that the bed frame can be placed on a flat surface for use after being unfolded. Preferably, at this time, only the bed leg needs to be installed on the bed leg support member on one side to complete the middle position support.

[0064] Preferably, hollow holes are reserved on the surfaces of the first bed board 1 and the second bed board 11 to reduce the weight of the electric bed. The size and arrangement of the hollow holes can be set as needed.

[0065] Preferably, the connecting pieces and the bed frame are made of metal materials, and the middle of the bed frame is supported and welded with the smallest pipe fittings to ensure the welding stability of the frame.

[0066] The present invention has a double-freedom folding method and a limiting device during the folding process, which makes folding more convenient and is not prone to scratching the frame.

[0067] As an optional solution 1, the present invention can also arrange the connecting member in the middle of the folding line of the first bed frame and the second bed frame, and the fixing members at both ends of the connecting member are respectively connected to the cross bars, and the cross bars are respectively fixed to the bed frames, and the first bed frame 3 and the second bed frame 4 are connected by a commonly used bidirectionally rotatable shaft. Where the commonly used shaft is used for connection, bed legs are added to enhance support.

[0068] As a second optional solution, the present invention can also arrange the connecting member only on one side, and the other side is connected by a bidirectionally rotatable shaft. Where the common shaft is connected, bed legs are added to enhance support.

[0069] The driving device is designed using an existing commonly used driving structure and driving method. For example, one of the driving devices includes a direct-push motor, a driving rod and a push rod, wherein the direct-push motor is hinged on the bed frame, the direct-push motor is connected to one end of the driving rod, and the other end of the driving rod is hinged to a rotating rod, one end of the push rod is connected to the rotating rod, and the other end of the push rod is connected to a flippable bed board.

[0070] Among them, the driving rod is pushed by the direct push motor, the driving rod drives the rotating rod, the rotating rod rotates to drive the push rod to push out, so that the electric bed bed board is lifted, and conversely, the electric bed bed board is lowered.

[0071] In the prior art, the drive device of the folding electric bed has various structural designs, which will not be described one by one with examples.

[0072] It should be noted that the electric bed described in the present invention is an existing publicly available electric bed structure, and its driving device, bed frame, bed board, etc. can be modified in many ways, which will not be illustrated one by one.

[0073] The connecting piece of the present invention is not only suitable for the foldable connection of several bed bodies of an electric bed, but also suitable for the foldable connection of bed bodies of other hard beds.

[0074] To this end, the present invention also provides a folding connector suitable for a folding bed, which includes:

[0075] A rotating member and a fixing member for connecting the rotating member;

[0076] A rotating shaft movably connects the fixed part and the rotating part at both ends of the upper edge of the rotating part;

[0077] A stopper fixed on the fixing member is used to limit the rotation of the rotating member.

[0078] Among them, the rotating part and the fixed part can rotate relative to each other along the rotating axis, and rounded corners are formed at both ends of the upper edge of the rotating part. The stop parts are distributed on both horizontal sides of the rotating part and are provided with arc grooves close to one side edge of the rotating part to accommodate the sliding of the rounded corners on the rotating part. The two ends of the arc groove are limit points for limiting the rotation of the rotating part.

[0079] Furthermore, the rotating shaft movably connects the rotating member to two symmetrically arranged fixing members respectively, and the fastener passes through the through holes on the fixing member and the stop member to connect the fixing member and the stop member.

[0080] Furthermore, the rotating part is in a triangular shape as a whole, and three corners are designed to be rounded. Optionally, an equilateral triangle design is adopted. Of course, the whole part can also adopt a trapezoidal structure, and a rounded design is adopted at the intersection of the edges. The size of the rounded radius is determined according to needs.

[0081] Furthermore, the stop member has an upper stop member upper edge and a lower stop member lower edge formed at its upper portion and lower portion respectively, and an arc groove is formed between the upper stop member edge and the lower stop member edge.

[0082] Furthermore, the rotating member has two rounded corners formed on its upper edge, and when rotating and folding, the rounded corners slide in the arc groove.

[0083] Those skilled in the art should be able to conceive of other application scenarios of the connector of the present invention based on the present invention, and the present invention will not be further described here.

[0084] The present invention has a double-freedom folding method and a limiting device is provided during the folding process, making the folding more convenient.

[0085] After the folding electric bed of the present invention is unfolded, both sides of the front and rear bed frames are provided with stoppers, which are limiting devices, which can limit the rotational freedom, thereby improving the strength. Since the rotational freedom is limited after unfolding, it is only necessary to install the bed legs on one side to support the entire folding position.

[0086] When folding, the present invention can be folded from any side or from both sides at the same time. The frame is not easily scratched during the folding process. At the same time, when unfolding, the stopper is used to limit the position, thereby increasing the operability of the folding.

[0087] In addition, the present invention adds a bed leg support member design and adopts a minimum pipe support welding in the middle of the frame, thereby ensuring the stability and strength of the frame.

[0088] It should be noted that the electric bed described in the present invention is an existing publicly available electric bed structure, and its driving device, bed frame, bed board, etc. can be modified in many ways, which will not be illustrated one by one.

[0089] The connecting piece of the present invention is not only suitable for the foldable connection of several bed bodies of an electric bed, but also suitable for the foldable connection of bed bodies of other hard beds.

[0090] The above embodiments are only preferred examples of the present invention and do not limit the scope of the invention. Based on the present invention, those skilled in the art can foresee other implementations that can achieve the same function within the scope of the claims.

[0091] Those skilled in the art will understand various embodiments and various variations and improvements. It should be noted that, except for obvious contradictions or incompatibilities, the above-mentioned features, variations and / or specific embodiments of the present invention may be combined with each other. All of these embodiments and variations and improvements belong to the protection scope of the present invention.

Claims

1. A double-degree-of-freedom folding electric bed, characterized in that: include: A bed board, comprising a first bed board and a second bed board which are respectively formed by splicing a plurality of bed boards and are flippable; A bed frame for fixing a bed board, comprising at least two first and second bed frames folded mutually, and a driving device for driving the bed board; as well as A connecting member for foldably connecting the first bed frame and the second bed frame; The connecting member comprises a rotating member, a fixing member fixed on the bed frame for connecting the rotating member, and a stop member fixed on the fixing member for limiting rotation. The rotating shaft movably connects the fixing member and the rotating member at both ends of the upper edge of the rotating member, so that the rotating member and the fixing member rotate relative to each other along the rotating shaft. The stop members are distributed on both sides of the rotating member in the horizontal direction and are provided with an arc groove near one side edge of the rotating member to accommodate the rotation of the rounded corner on the rotating member. The stopper has an upper edge and a lower edge formed on its upper and lower parts respectively, an arc groove is formed between the upper edge and the lower edge of the stopper, and both ends of the arc groove are limit points for the rotation of the limit rotating member; The rotating part is a triangular structure as a whole, and the three corners are rounded.

2. A double-degree-of-freedom folding electric bed according to claim 1, characterized in that: The bed frame is provided with bed legs and a bed leg support piece is arranged near the connecting piece. The bed leg support piece is also fixed on the bed board. The end surface of the bed leg support piece is provided with a fixing hole for connecting the bed legs.

3. A double-degree-of-freedom folding electric bed according to claim 2, characterized in that: There is at least one bed leg support, one side of which is connected to the bed frame, and the other side is connected to the bed board.

4. A double-degree-of-freedom folding electric bed according to any one of claims 1 to 3, characterized in that: In the folded state, the upper edge of the stopper clamps the upper edge of the rotating member, and in the flattened state, the lower edge of the stopper clamps the lower edge of the rotating member.

5. A double-degree-of-freedom folding electric bed according to any one of claims 1 to 3, characterized in that: The bed board is provided with hollow holes.

6. A folding connector with two degrees of freedom, used for connecting a folding bed, characterized in that: include: A rotating member and a fixing member for connecting the rotating member; The rotating shaft movably connects the fixed part and the rotating part at both ends of the upper edge of the rotating part; A stopper fixed on the fixed member and used for limiting the rotation of the rotating member; The rotating member and the fixed member are connected to rotate relative to each other along the rotating axis, and the stop members are distributed on both sides of the rotating member in the horizontal direction and are provided with arc grooves near one edge of the rotating member to accommodate the rotation of the rounded corners on the rotating member; The stopper has an upper edge and a lower edge formed on its upper and lower parts respectively, an arc groove is formed between the upper edge and the lower edge of the stopper, and both ends of the arc groove are limit points for the rotation of the limit rotating member; The rotating part is a triangular structure as a whole, and the three corners are rounded.

7. The folding connector with two degrees of freedom according to claim 6, characterized in that: The rotating shaft movably connects the rotating member with two symmetrically arranged fixing members respectively, and the fastener passes through the through holes on the fixing member and the stop member to connect the fixing member and the stop member.

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