CN108813920B

CN108813920B - Folding table with folding frame and folding frame thereof

Info

Publication number: CN108813920B
Application number: CN201811012261.XA
Authority: CN
Inventors: 潘兴民; 潘雨声
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2023-12-08
Anticipated expiration: 2038-08-31
Also published as: CN108813920A

Abstract

The invention discloses a folding table with a folding frame and the folding frame thereof, and belongs to the field of furniture. The device mainly comprises a pressure-bearing frame A and a pressure-bearing frame B which are connected through a hinge, wherein the pressure-bearing frame A and the pressure-bearing frame B are respectively hinged with a leg frame A and a leg frame B through a hinge shaft A and a hinge shaft B, the sum of the distance H1 from the side end face of one end of the pressure-bearing frame B far away from the hinge to the center of the hinge shaft and the distance H from the center of the hinge shaft to the upper surface of the pressure-bearing frame A is equal to the sum of the distance from the center of the hinge shaft B to the upper surface of the pressure-bearing frame B and the distance from the center of the hinge shaft B to the bottom surface of the leg frame B, and the distance from the center of the hinge shaft B to the side end face of the similar pressure-bearing frame B is greater than or equal to the distance from the center of the hinge shaft B to the outer side face of the leg frame B and greater than or equal to the distance from the center of the hinge shaft to the upper end face of the leg frame B. According to the invention, the equal-height folding or heightened folding is realized according to the different lengths of the upper surfaces of the two pressure-bearing frames, the use is convenient, and the folding modes of various forms are realized. The folding furniture is mainly used for folding furniture.

Description

Folding table with folding frame and folding frame thereof

Technical Field

The invention belongs to the field of furniture, and particularly relates to a folding table with a folding frame and the folding frame thereof.

Background

At present, a foldable frame or foldable furniture disclosed in the prior art, for example, the invention patent application with the application number 201710888955.9 discloses a simple folding table, which comprises a pair of foldable table frames and table legs arranged on the table frames, wherein the two table frames are connected through a hinge assembly, a table plate is arranged on each table frame, the two table plates are downwards rotated in a unidirectional manner to enable the two table plates to be folded, the table legs are rotatably arranged on the table frames and can be rotated to the back of the table plate, the volume of the folded table is smaller, and the folded table is convenient to transport and store. The folding table can be conveniently unfolded and folded, is practical, but has single function after being unfolded, and the table top can only have one use area and one height mode.

Disclosure of Invention

The invention aims to overcome the defects and provide a folding table with a folding frame and the folding frame thereof, wherein the bearing frames on two sides of the folding table can be folded downwards by 90 degrees, the folded bearing frames can be used as leg frames, and the folding table can be folded at equal height or heightened according to the different lengths of the upper surfaces of the two bearing frames, is convenient to use and realizes various folding modes.

The folding frame comprises a frame body, wherein the frame body comprises a pressure-bearing frame A and a pressure-bearing frame B, one ends of the pressure-bearing frame A and the pressure-bearing frame B are connected through a hinge, the pressure-bearing frame A and the pressure-bearing frame B can rotate by 0-180 degrees relatively through a hinge shaft of the hinge, the other end of the pressure-bearing frame A is hinged with a leg frame A through the hinge shaft A, the other end of the pressure-bearing frame B is hinged with a leg frame B through the hinge shaft B, and the pressure-bearing frame A and the pressure-bearing frame B can rotate by 0-90 degrees relatively with the hinged leg frames A and B respectively; the length of the upper surface of the pressure-bearing frame A is greater than or equal to that of the upper surface of the pressure-bearing frame B; when the pressure-bearing frame A and the pressure-bearing frame B are respectively vertical to the connected leg frames A and B, the heights of the pressure-bearing frame A and the pressure-bearing frame B are equal when the pressure-bearing frame A and the pressure-bearing frame B are unfolded to be horizontal; the hinge shaft is arranged at the bottoms of the pressure-bearing frame A and the pressure-bearing frame B, the sum of the distance H1 from the side end face of one end of the pressure-bearing frame B, which is far away from the hinge, to the center of the hinge shaft and the distance H from the center of the hinge shaft to the upper surface of the pressure-bearing frame A is equal to the sum of the distance from the center of the hinge shaft B to the upper surface of the pressure-bearing frame B and the distance from the center of the hinge shaft B to the bottom surface of the leg frame B, and the distance from the center of the hinge shaft B to the side end face of the similar pressure-bearing frame B is greater than or equal to the distance from the center of the hinge shaft B to the outer side face of the leg frame B and greater than or equal to the distance from the center of the hinge shaft B to the upper end face of the leg frame B. Therefore, when the 90-degree folding is carried out on the pressure-bearing frame B, the pressure-bearing frame B can be used as a new leg frame, the pressure-bearing frame A can be ensured to be kept horizontal, and the leg frame B does not exceed the side end face of the pressure-bearing frame B in a folding or unfolding state, namely, the equal-height folding is realized.

Further, the bearing frame A and the bearing frame B are respectively provided with a shaft sleeve A and a shaft sleeve B, the hinge shaft A penetrates through the shaft sleeve A, the hinge shaft B penetrates through the shaft sleeve B, the distance from the center of the hinge shaft B to the near side end face is equal to the distance from the hinge shaft B to the outer side face of the leg frame B, and the distance from the hinge shaft A to the upper end face of the leg frame B is equal to the distance from the hinge shaft B to the upper end face of the leg frame B.

When the pressure-bearing frame A and the pressure-bearing frame B and the leg frame connected with the pressure-bearing frame B are completely unfolded, the outer side surface of the leg frame B is enabled to be flush with the bottom surface of the leg frame A when the pressure-bearing frame A is folded downwards by 90 degrees, and conditions are created for heightening and folding.

Further, the distance from the center of the hinge shaft A to the near side end face is equal to the distance from the center of the hinge shaft A to the outer side face of the leg frame A, and the distance from the center of the hinge shaft A to the upper end face of the leg frame A. The leg frame A can be used as a base when the pressure-bearing frame A is folded by 90 degrees, and the outer side face of the leg frame A is in full contact with the ground when the leg frame A is perpendicular to the pressure-bearing frame A.

Preferably, the length of the upper surface of the pressure-bearing frame A is equal to that of the upper surface of the pressure-bearing frame B, and staggered legs are arranged on the side surfaces of the leg frame B or the leg frame A. The mode is that the equal frame is folded, and the length of the upper surface of the pressure-bearing frame is equal to the distance from the side end face of one end, far away from the hinge, of the pressure-bearing frame to the center of the hinge shaft.

Preferably, the length of the upper surface of the pressure-bearing frame A is longer than that of the upper surface of the pressure-bearing frame B, and the length difference D between the upper surfaces of the pressure-bearing frame A and the pressure-bearing frame B is smaller than the thickness D of the leg frame A; the inner side surface of the leg frame B is provided with staggered legs, and the effective staggered length is the thickness D of the leg frame A minus the upper surface length difference D. The effective staggered length is the distance from the bottom surface of the non-staggered part of the leg frame B to the bottom surface of the staggered legs. And under the condition of complete unfolding, the pressure-bearing frame A is folded downwards to realize heightened folding, and the non-staggered parts of the leg frames B are "standing" on the leg frames A, so that the pressure-bearing frame B is kept horizontal.

Preferably, the length of the upper surface of the pressure-bearing frame A is greater than that of the upper surface of the pressure-bearing frame B, and the length difference D between the upper surfaces of the pressure-bearing frame A and the pressure-bearing frame B is greater than the thickness D of the leg frame A and less than the thickness D1 of the frame body; and a cushion block is arranged on one side of the leg frame A opposite to the leg frame B, and the thickness of the cushion block is equal to the length difference D of the upper surface minus the thickness D of the leg frame A. In this heightened folding, the leg frame B stands on the pad of the leg frame a, thereby keeping the pressure-bearing frame B horizontal.

Preferably, the length of the upper surface of the pressure-bearing frame A is greater than that of the upper surface of the pressure-bearing frame B, and the difference D between the lengths of the upper surfaces of the pressure-bearing frame A and the pressure-bearing frame B is greater than the thickness D1 of the frame body; the leg frame A is provided with a foldable lengthening frame.

Further, the hinge part of the pressure-bearing frame A and the pressure-bearing frame B is provided with a positioning mechanism, the positioning mechanism comprises a positioning plate and a positioning bulge, the positioning plate is hinged with the outer side of the pressure-bearing frame A, the positioning bulge is arranged on the outer side of the pressure-bearing frame B, the positioning plate is provided with a positioning notch, and the positioning bulge is matched with the positioning notch.

The folding table with the folding frame comprises the folding frame, and the pressure-bearing frame A and the pressure-bearing frame B are respectively provided with a panel.

Further, a switching mechanism is arranged between the pressure-bearing frame A and the pressure-bearing frame B of the folding frame, the switching mechanism comprises a hinge I, a bidirectional hook is hinged to the bottom of the hinge I, and a hinge shaft of the hinge I is concentric with the hinge shaft. The first hinge can fix the switching panel, and a locating nail matched with the bidirectional hook is arranged on the adjacent panel or the fixing piece of the first hinge. The switching panel on the side of the pressure-bearing frame A or the pressure-bearing frame B extends to the panel on the other side, and the upper surface area is not increased when the pressure-bearing frame and the panel connected with the pressure-bearing frame are completely folded.

Further, the frame body is provided with more than one group of flap mechanisms, and the flap mechanisms comprise a flap plate I and a flap plate support assembly; the first hinge plate is hinged on a support rod fixedly connected with the frame body, the turning plate support assembly comprises a folding connecting rod capable of self-locking at 180 degrees, one end of the folding connecting rod is hinged with the frame body, and the folding connecting rod at the other end of the folding connecting rod is provided with a second hinge plate; the hinge shaft of the hinge plate I close to the hinge coincides with the center line of the hinge shaft, and the bottom of the hinge shaft is provided with a positioning nail matched with the bidirectional hook.

Further, the two ends of the frame body are provided with auxiliary leg supporting frames, each auxiliary leg supporting frame comprises an auxiliary leg hinge plate, auxiliary leg supporting plates are fixed on the auxiliary leg hinge plates and are hinged with two side edges of the pressure-bearing frame A and the pressure-bearing frame B respectively, the auxiliary leg hinge plates are provided with limiting holes I, the limiting holes I penetrate through the auxiliary leg supporting plates, and the pressure-bearing frame A and the pressure-bearing frame B are provided with limiting holes II corresponding to the limiting holes I.

The folding table with the folding frame comprises the folding frame, a first hinge plate and a second hinge plate of the turnover plate mechanism are provided with turnover plate panels, and the switching mechanism is provided with switching panels corresponding to the first hinge.

Compared with the prior art, the invention has the beneficial effects that:

1. the equal-height folding mode and the heightening folding mode of the pressure-bearing frame are realized by limiting the hinge shaft position between the pressure-bearing frame A and the pressure-bearing frame B and the length relation between the pressure-bearing frame and the leg frame;

2. the positions of the centers of the hinge shafts of the pressure-bearing frame and the leg frames are limited, so that the leg frames are prevented from being in contact with the upper surfaces of the pressure-bearing frame and the leg frames in a same-height folding mode and an heightening folding mode;

3. the foldable leg frames, the supporting frames with auxiliary legs capable of being stored in a turnover mode and a plurality of groups of turning plate mechanisms are arranged on the frame body, so that the foldable leg frame disclosed by the invention has different heights and different unfolding lengths of the body through different folding modes, and is multiple in unfolding modes and convenient to use;

4. after the frame body is folded in half, the frame is small in size and convenient to transport and store, and greatly meets residents living in small-area households.

Drawings

FIG. 1 is a schematic view of a fully unfolded state of a frame body according to the second embodiment;

fig. 2 is a schematic structural view of an embodiment two with auxiliary leg support frame for unfolding 270 degrees;

fig. 3 is a schematic folding view of a second pressure-bearing frame B of the embodiment;

FIG. 4 is an exploded view of a second embodiment of a panel turnover mechanism;

fig. 5 is a plan view of the leg rest of the third embodiment when housed;

fig. 6 is an exploded view of a two-sided flap mechanism and a leg support frame according to a third embodiment;

fig. 7 is a schematic structural diagram of a fifth embodiment;

FIG. 8 is an expanded schematic view of the four, five and six embodiment flap mechanisms;

FIG. 9 is an exploded view of a single-sided flap mechanism in a second embodiment;

fig. 10 is a folding and storing schematic diagram of a second embodiment;

fig. 11 is a schematic structural view of a fourth embodiment;

fig. 12 is a schematic structural view of a sixth embodiment;

fig. 13 is a schematic diagram of a split structure of the bearing frame a and the bearing frame B;

FIG. 14 is a schematic view showing the structure of a four-leg housing according to the embodiment;

fig. 15 is a schematic structural view of the first embodiment;

FIG. 16 is an enlarged view of a portion M of FIG. 1;

fig. 17 is a partial enlarged view of the portion N in fig. 1;

fig. 18 is a partial enlarged view of the V portion of fig. 2;

fig. 19 is a partial enlarged view of the portion P in fig. 3;

fig. 20 is a schematic diagram of the present invention.

In the figure, 1, a pressure-bearing frame A; 2. a hinge; 3. a pressure-bearing frame B; 5. a leg supporting frame is attached; 6. a flap mechanism; 7. a switching mechanism; 8. a positioning mechanism; 11. a side end face; 12. a foot bottom surface; 13. an outer side surface; 14. an upper end surface; 21. a drawing point plate; 22. a pull point axis A; 23. pulling a plate; 24. a chute; 25. a pull point shaft B; 26. a shaft plate; 27. a hinge shaft; 28. a notch; 31. a sliding groove; 40. a diagonal bracing limit rod; 41. a diagonal brace plate; 42. a leg frame A; 43. a leg rest B; 44. a cushion block; 45. staggered legs and feet; 46. a foldable extension frame; 48. a hinge axis A; 49. a hinge axis B; 51. a hinged plate with auxiliary legs; 52. a leg supporting plate is attached; 53. a first limiting hole; 54. a limiting hole II; 55. auxiliary leg patch; 61. a hinge plate I; 62. folding the connecting rod; 63. a second hinge plate; 65. a flap panel; 72. a first hinge; 73. a two-way hook; 75. a switching panel; 81. a positioning plate; 82. positioning the notch; 83. positioning the protrusion.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

embodiment one: as shown in fig. 1 and 15, a folding frame comprises a frame body, wherein the frame body comprises a bearing frame A1 and a bearing frame B3, one ends of the bearing frame A1 and the bearing frame B3 are connected through a hinge 2, the bearing frame A1 and the bearing frame B3 can rotate by 0-180 degrees relative to each other through a hinge shaft 27 of the hinge 2, the other end of the bearing frame A1 is hinged with a leg frame a42 through a hinge shaft a48, the other end of the bearing frame B3 is hinged with a leg frame B43 through a hinge shaft B49, and the bearing frame A1 and the bearing frame B3 can rotate by 0-90 degrees relative to the hinged leg frame a42 and leg frame B43 respectively; the length of the upper surface of the pressure-bearing frame A1 is longer than that of the upper surface of the pressure-bearing frame B3; the bearing frame A1 and the bearing frame B3 are respectively vertical to the leg frame A42 and the leg frame B43 which are connected, and the heights of the bearing frame A1 and the bearing frame B3 are consistent when the bearing frame A1 and the bearing frame B3 are unfolded to be horizontal; the hinge shaft 27 is arranged at the bottoms of the pressure-bearing frame A1 and the pressure-bearing frame B3, the sum of the distance from the side end face 11 of one end of the pressure-bearing frame B3 far away from the hinge 2 to the center of the hinge shaft 27 and the distance from the center of the hinge shaft 27 to the upper surface of the pressure-bearing frame A1 is equal to the sum of the distance from the center of the hinge shaft 49 to the upper surface of the pressure-bearing frame B3 and the distance from the center of the hinge shaft 49 to the bottom surface 12 of the leg frame B43, namely the height of the frame body when the frame is completely unfolded, and the distance from the center of the hinge shaft 49 to the adjacent side end face 11 is equal to the distance from the center of the hinge shaft 49 to the outer side face 13 of the leg frame B43 and the distance from the center of the hinge shaft 49 to the upper end face 14 of the leg frame B43. The hinge axis 48 is spaced from the proximal end face 11 by a distance greater than the distance from the outer side face 13 of the leg a42 and greater than the distance from the upper end face 14 of the leg a 42. When the support frame is fully unfolded, the support frame B3 is folded downwards by 90 degrees, and the support frame B3 serves as a new leg frame, so that the upper surface of the support frame A1 can still be kept horizontal.

As shown in fig. 2, 18 and 10, the hinge 2 comprises a pull point plate 21 and a shaft plate 26, the two sides of the bearing frame A1 are respectively provided with the pull point plate 21 which is fixedly connected, the two sides of the bearing frame B3 are respectively provided with the shaft plate 26 which is fixedly connected, the lower part of the pull point plate 21 is provided with a pull point shaft a22, the lower part of the shaft plate 26 is provided with a pull point shaft B25, a pull plate 23 is arranged between the pull point plate 21 and the shaft plate 26, one end of the pull plate 23 is hinged with the pull point shaft B25, the other end of the pull plate 23 is provided with a sliding groove 24, the pull point shaft a22 moves in the sliding groove 24, the shaft plate 26 is provided with a shaft hole, the shaft hole and the pull point shaft a22 are on the same horizontal line, the shaft hole is directly above the pull point shaft B25, the shaft hole 27 is provided with a shaft sleeve which is fixed on the bearing frame A1; at least one pull plate 23 on the front side and the rear side of the pressure-bearing frame A1 is provided with a notch 28 matched with the pull point shaft A22, and preferably the pull plate 23 on the front outer side of the pressure-bearing frame A1 is provided with the notch 28;

as shown in fig. 1, 2 and 3, a positioning mechanism 8 is arranged at the hinge position of the pressure-bearing frame A1 and the pressure-bearing frame B3, the positioning mechanism 8 comprises a positioning plate 81 and a positioning protrusion 83, the positioning plate 81 is hinged with the outer side of the pressure-bearing frame A1, a positioning notch 82 is arranged on the positioning plate 81, the positioning protrusion 83 is arranged on the outer side of the pressure-bearing frame B3, and the positioning protrusion 83 is matched with the positioning notch 82, so that the vertical pressure-bearing frame A1 and the vertical pressure-bearing frame B3 are supported and positioned;

as shown in fig. 1, 16 and 19, the pressure-bearing frame A1 and the pressure-bearing frame B3 are provided with a switching mechanism 7 at the hinge joint, the switching mechanism 7 comprises a hinge one 72 and a bidirectional hook 73 hinged with the bottom of the hinge one 72, and the central line of the hinge shaft one 72 coincides with the central line of the hinge shaft 27; the lower parts of the hinges or hinge plates adjacent to the first hinge 72 are respectively provided with positioning nails matched with the bidirectional hooks 73, and the first hinge 72 is hinged on the supporting plate of the pressure-bearing frame B3. The bidirectional hooks 73 on the sides of the bearing frame A1 and the bearing frame B3 are arranged in a staggered way up and down and can be hooked with each other.

As shown in fig. 4, two groups of plate turnover mechanisms 6 are arranged on the frame body, the plate turnover mechanisms 6 comprise a first hinge plate 61 and a plate turnover supporting component, the first hinge plate 61 is hinged on a supporting plate of the bearing frame B3, the plate turnover supporting component comprises two folding connecting rods 62 capable of self-locking at 180 degrees, one ends of the two folding connecting rods 62 are hinged, the other ends of the folding connecting rods 62 at the lower end are hinged with the frame body, and a second hinge plate 63 is arranged at the other end of the folding connecting rod 62 at the upper end. Wherein the hinge axis of the hinge plate one 61 near the hinge 2 coincides with the center line of the hinge axis 27, and the lower part of the hinge plate one 61 is provided with a positioning pin matched with the bidirectional hook 73.

As shown in fig. 1, 2 and 4, two side edges of a pressure-bearing frame A1 and a pressure-bearing frame B3 are provided with auxiliary leg supporting frames 5 capable of turning outwards by 0-270 degrees, each auxiliary leg supporting frame 5 comprises an auxiliary leg hinged plate 51 and an auxiliary leg supplementary plate 55, an auxiliary leg supporting plate 52 can be fixed on each auxiliary leg hinged plate 51, each auxiliary leg hinged plate 51 is hinged with two side edges of the pressure-bearing frame A1 and the pressure-bearing frame B3 respectively, a first limiting hole 53 is arranged on each auxiliary leg hinged plate 51, each limiting hole 53 penetrates through each auxiliary leg supporting plate 52, each pressure-bearing frame A1 and each pressure-bearing frame B3 are provided with a second limiting hole 54 corresponding to each limiting hole 53, and when the auxiliary leg hinged plates 51 are attached to the outer sides of the pressure-bearing frames, the first limiting holes 53 and the second limiting holes 54 are fixed through bolts and nuts; the auxiliary leg patch 55 is fixedly connected with the bearing frame A1 and the bearing frame B3 respectively.

As shown in fig. 1 and 13, sliding grooves 31 are respectively formed in the inner sides of the bearing frame A1 and the bearing frame B3, one end of the diagonal brace 41 is hinged to the leg frame, the other end of the diagonal brace 41 slides in the sliding grooves 31, when the bearing frame is perpendicular to the hinged leg frame, the diagonal brace 41 reaches the end of the sliding grooves 31, and meanwhile, wing plates of the diagonal brace limiting rods 40 fixed on the bearing frame A1 and the bearing frame B3 fall into corresponding notches of the diagonal brace 41, so that the diagonal brace 41 is prevented from moving in the sliding grooves 31, and positioning is completed.

The embodiment realizes equal-height folding of the bearing frame B3, namely the bearing frame B3 can be used as a leg frame after being folded by 90 degrees, meanwhile, the height of the bearing frame A1 is unchanged, and the bearing frame A1 of the embodiment cannot be used as a leg frame.

The folding table with the folding frame comprises the folding frame, the first hinge plate 61 and the second hinge plate 63 of the turnover plate mechanism 6 are provided with turnover plate panels 65, and the switching mechanism 7 is provided with a switching panel 75 corresponding to the first hinge 72.

Embodiment two: as shown in fig. 1, the distance from the hinge shaft 48 to the proximal side end face 11 is equal to the distance from the hinge shaft to the outer side face 13 of the leg a42 and the distance from the hinge shaft to the upper side face 14 of the leg a 42; the other is the same as in the first embodiment. In this embodiment, when the pressure-bearing frame A1 and the pressure-bearing frame B3 and the leg frame hinged thereto are fully unfolded, the pressure-bearing frame A1 may be folded down by 90 °, and the outer side 13 of the leg frame B43 is flush with the sole 12 of the leg frame a42, so as to create conditions for heightening and folding; the heightened folding means a folding mode that the upper surface length of the pressure-bearing frame A1 is larger than the upper surface length of the pressure-bearing frame B3, and when the pressure-bearing frame A1, the pressure-bearing frame B3 and the leg frames connected with the pressure-bearing frame A1 are completely unfolded, the pressure-bearing frame A1 is folded downwards by 90 degrees, and the pressure-bearing frame B3 is kept horizontal after being processed, and the height of the folding mode is increased.

The folding table with the folding frame comprises the folding frame of the second embodiment, the first hinge plate 61 and the second hinge plate 63 of the panel turnover mechanism 6 are provided with panel turnover plates 65, and the switching mechanism 7 is provided with a switching plate 75 corresponding to the first hinge 72.

The invention can be converted in the following folding state:

in the state of fig. 1, the diagonal bracing limiting rod 40 is rotated to separate the wing plates from the corresponding notches of the diagonal bracing plate 41, the leg frame a42 and the leg frame B43 are folded inwards by 90 degrees, the auxiliary leg supporting frame 5 hinged by the bearing frame A1 and the bearing frame B3 is rotated by 270 degrees, the auxiliary leg supporting frame 5 is provided with the limiting hole two 54 of the bearing frame A1 and the bearing frame B3 corresponding to the limiting hole one 53, and the limiting hole one 53 and the limiting hole two 54 are fixed through bolts and nuts, so that a short frame as shown in fig. 2 can be formed.

In the state of fig. 1, the expansion angle of the pressure-bearing frame A1 and the pressure-bearing frame B3 is 180 °, and the included angles between the pressure-bearing frame A1 and the pressure-bearing frame B3 and the leg frame a42 and the leg frame B43 hinged with the pressure-bearing frame A1 and the pressure-bearing frame B3 are 90 °, namely the fully-expanded state. At this time, the pull-point axis a22 is positioned in the notch 28 of the pull plate 23. Lifting the pull plate 23 upwards to separate the notch 28 on the chute 24 from the pull point shaft A22, then rotating the pressure-bearing frame B3 downwards to enable the pressure-bearing frame B3 to be vertical to the ground, and rotating the positioning plate 81 of the positioning mechanism 8 to enable the positioning notch 82 to enter the positioning protrusion 83 so as to perform positioning; the switching panel 75 fixed by the hinge I72 on the side of the bearing frame B3 is turned by 90 degrees, the bidirectional hook 73 hinged under the hinge I72 on the side of the bearing frame B3 hooks the hinge shaft under the hinge I72 on the side of the bearing frame A1, and the bidirectional hook 73 under the hinge I72 on the side of the bearing frame A1 hooks the positioning nail at the bottom of the hinge plate I61 at one end of the hinge 2, so that a complete tabletop is formed. The angle between the leg frame B43 and the bearing frame B3 can be maintained at a stable level of the bearing frame A1 at both 0 ° and 90 °, as shown in fig. 3.

In the state of fig. 3, the two layers of turning plate panels 65 on one side of the pressure-bearing frame B3 are rotated upwards by 90 degrees, so that the two connecting rods of the self-locking folding connecting rod 62 are at the 180-degree self-locking position, and the supporting and positioning of each layer of turning plate panels 65 are completed; at this time, the bidirectional hooks 73 may not hook the corresponding positioning nails; the auxiliary leg support 5 can be turned 90 deg. to increase stability as shown in figure 4. In this state, each layer of flap panel 65 can also be turned over individually.

In the state of fig. 1, the diagonal brace limiting rod 40 is rotated to enable the wing plates of the diagonal brace limiting rod to be separated from the corresponding notches of the diagonal brace plate 41, and the diagonal brace plate 41 can move in the sliding groove 31 to enable the leg frame A42 and the leg frame B43 to be folded for 90 degrees; the notch 28 of the pull plate 23 on the front outer side of the bearing frame A1 is separated from the pull point shaft A22, so that the pull point shaft A22 can move in the sliding groove 24, and the bearing frame A1 and the bearing frame B3 are folded for 180 degrees to form a completely folded state, as shown in FIG. 10.

In the state of fig. 10, turning the turning plate panel 65 at the side of the bearing frame A1 to make the two folding connecting rods 62 self-lock and position and support at 180 degrees, and the auxiliary leg supporting frame 5 rotates by 90 degrees to serve as a support; the two side switching panels 75 and the turnover panel 65 on the side of the upper layer bearing frame A1 can be connected into a whole through the two side switching mechanisms 7 to form a desktop form with the minimum upper layer, as shown in fig. 9. In this state, each layer of flap panel 65 can also be turned over individually.

Embodiment III: as shown in fig. 5 and 14, the lengths of the upper surfaces of the bearing frame A1 and the bearing frame B3 are equal, and in order to avoid the collision when the leg frame a42 and the leg frame B43 are folded, the inner side surface of the leg frame a42 or the leg frame B43 may be provided with staggered legs 45; the staggered legs 45 are used as a part of the leg frame B43, and the height of the original frame body is not changed; the other is the same as the embodiment.

As shown in fig. 6, in the fully folded state, the leg support frame 5 is turned by 90 °, and the two side flap panels 65 are turned by 90 ° simultaneously, so as to form a tabletop with layered arrangement on both sides, wherein each flap panel 65 can be unfolded independently.

Embodiment four: as shown in fig. 11, the length of the upper surface of the bearing frame A1 is greater than that of the upper surface of the bearing frame B3, the difference D between the lengths of the upper surfaces of the bearing frame A1 and the bearing frame B3 is smaller than the thickness D of the leg frame a42, and the leg frame B43 is provided with staggered legs 45; the effective staggered length of the staggered legs 45 is the leg thickness D minus the length difference D; the other is the same as the embodiment. When the pressure-bearing frame A1 and the pressure-bearing frame B3 are respectively vertical to the leg frame A42 and the leg frame B43 hinged with the pressure-bearing frame A1, the side end face 11 on the pressure-bearing frame A1 is flush with the outer side face 13 of the leg frame A42, and the outer side face 13 of the leg frame B43 is flush with the sole face 12 of the leg frame A42.

In the fully unfolded state, the angles of the pressure-bearing frame A1 and the pressure-bearing frame B3 are 180 degrees, and the included angles between the pressure-bearing frame A1 and the pressure-bearing frame B3 and the leg frames A42 and the leg frames B43 hinged with the pressure-bearing frame A1 and the pressure-bearing frame B3 are 90 degrees; as shown in fig. 11, the pressure-bearing frame A1 rotates downward by 90 ° to make the non-staggered part of the leg frame B43 "stand" on the horizontally placed leg frame a42, and rotates the positioning plate 81 of the positioning mechanism 8 to make the positioning notch 82 enter the positioning protrusion 83, so as to perform positioning; the switching panel 75 on the side of the pressure frame A1 is rotated by 90 °, and is integrally connected to the switching panel 75 and the flap panel 65 on the side of the pressure frame B3.

In the state of fig. 11, the hinged turnover panel 65 of the pressure-bearing frame A1 can be turned to 90 ° and positioned, and meanwhile, the hinged auxiliary leg supporting frame 5 of the pressure-bearing frame A1 is turned by 90 ° to form a desktop form as shown in fig. 8;

fifth embodiment: the length of the upper surface of the pressure-bearing frame A1 is greater than that of the upper surface of the pressure-bearing frame B3, and the length difference D between the upper surfaces of the pressure-bearing frame A1 and the pressure-bearing frame B3 is greater than the thickness D of the leg frame A42 and less than the thickness D1 of the frame body; a cushion block 44 is arranged on one side of the leg frame A42 opposite to the leg frame B43, and the thickness of the cushion block 44 is equal to the length difference D of the upper surface minus the thickness D of the leg frame A42; the other is the same as the embodiment.

In the fully unfolded state of fig. 1, the angles of the pressure-bearing frame A1 and the pressure-bearing frame B3 are 180 degrees, and the included angles between the pressure-bearing frame A1 and the pressure-bearing frame B3 and the leg frames a42 and the leg frames B43 hinged with the pressure-bearing frame A1 and the pressure-bearing frame B3 are 90 degrees; as shown in fig. 7, the pressure-bearing frame A1 rotates downward by 90 ° to make the leg frame B43 "stand" on the pad 44 of the horizontally placed leg frame a42, and rotates the positioning plate 81 of the positioning mechanism 8 to make the positioning notch 82 enter the positioning protrusion 83, so as to perform positioning; the switching panel 75 on the side of the pressure frame A1 is rotated by 90 °, and is integrally connected to the switching panel 75 and the flap panel 65 on the side of the pressure frame B3.

In the state of fig. 7, the hinged turnover panel 65 of the bearing frame A1 can be turned to 90 ° and positioned, and meanwhile, the hinged auxiliary leg supporting frame 5 of the bearing frame A1 is turned by 90 ° to form a desktop form as shown in fig. 8.

Example six: the length of the upper surface of the pressure-bearing frame A1 is longer than that of the upper surface of the pressure-bearing frame B3, and the length difference D between the upper surfaces of the pressure-bearing frame A1 and the pressure-bearing frame B3 is longer than the thickness D1 of the frame body; the leg frame A42 is provided with a foldable lengthening frame 46; the other is the same as the embodiment.

As shown in fig. 12, the foldable extension frame 46 is hinged to the leg portion of the leg frame a42, the cross section of the foldable extension frame is U-shaped, when the angle between the foldable extension frame and the leg frame a42 is 0 °, the U-shaped inner wall is attached to the surface of the leg frame a42, the whole of the U-shaped inner wall does not exceed the sole surface 12 of the leg frame a42, when the foldable extension frame is perpendicular to the leg frame a42, the U-shaped inner wall is attached to the outer side 13 of the leg frame B43, and corresponding positioning holes are respectively formed in the foldable extension frame 46 and the leg frame B43, so that the positioning can be completed when bolts penetrate into the positioning holes.

In the fully unfolded state, the angles of the pressure-bearing frame A1 and the pressure-bearing frame B3 are 180 degrees, and the included angles between the pressure-bearing frame A1 and the pressure-bearing frame B3 and the leg frames A42 and the leg frames B43 hinged with the pressure-bearing frame A1 and the pressure-bearing frame B3 are 90 degrees; as shown in fig. 12, the bearing frame A1 is turned down by 90 °, the foldable extension frame 46 is unfolded and attached to the surface of the leg frame B43, and the corresponding positioning holes are penetrated by bolts, so that the leg frame B43 "stands" on the horizontally placed leg frame a42 through the foldable extension frame 46.

In the state of fig. 12, the hinged turnover panel 65 of the bearing frame A1 can be turned to 90 ° and positioned, and meanwhile, the hinged auxiliary leg supporting frame 5 of the bearing frame A1 is turned by 90 ° to form a desktop form as shown in fig. 8.

The center selection principle of the hinge axis B49 in the invention is as follows:

the equal-height folding is performed in the fully unfolded state, which is essentially to keep the height of the hinge shaft 27 unchanged before and after folding, the length of the upper surface of the pressure-bearing frame B3 is equal to the center height of the hinge shaft 27, theoretically, the distance from the center of the hinge shaft B49 to the foot bottom surface 12 of the leg frame B43 is equal to the center height of the hinge shaft 27, and the center of the hinge shaft B49 is optimal on the intersection point of the end surface 11 and the lower surface of the pressure-bearing frame B3, but in practice, the hinge 2 has a certain volume, and the center of the hinge shaft B49 is necessarily between the side end surface 11 of the pressure-bearing frame B3 and the hinge shaft 27. When the leg B43 is stored, the leg B43 must exceed the central end surface by a length exceeding the center of the hinge shaft 27 and perpendicular to the upper surface of the pressure-bearing frame B3, which may cause interference between the leg and the upper surface of the pressure-bearing frame and between the leg and the leg.

The analysis is as follows: as shown in fig. 20, in the fully unfolded state, the vertical distance between the center of the hinge shaft B49 and the center of the hinge shaft 27 is R1, and the vertical distance between the center of the hinge shaft 27 and the foot bottom surface 12 of the leg frame B43 is L1; the horizontal distance between the outer side surface 13 of the leg B43 and the center of the hinge shaft B49 is R2, and the horizontal distance between the outer side surface 13 of the leg B43 and the center of the hinge shaft 27 is L2; when the height is equal, l1=l2, then the horizontal distance h1=l2-R2 between the center of the hinge shaft B49 and the center of the hinge shaft 27; the distance h2=l1+r1 between the center of the hinge axis B49 and the sole surface 12 is such that, when the leg B43 is stored, the distance beyond the center end surface is: h2-h1=l1+r1- (L2-R2) =r1+r2, so the smaller the value of r1+r2, the smaller the value of the leg B43 exceeding the center end face, i.e., the length of the leg B43 exceeding the center end face is smallest when the boss of the hinge shaft B49 is tangent to the bearing frame B3 side end face 11 and the lower surface of the bearing frame B3, respectively. Similarly, the value of the central end face of the leg frame a42 extending out of the bearing frame A1 is also related to the size of r1+r2.

In the hinge 2, the bearing frames have a space at the position of the center end face of the opposite leg frame, and a space is also reserved between the folded leg frame and the upper surface of the bearing frame on the same side, so that two conditions that the leg frame B43 does not abut against the upper surface of the bearing frame A1 are satisfied: (1) the requirements that the leg frame B43 does not abut against the upper surface of the pressure-bearing frame A1 when being folded are met: the sum of the distance from the center of the hinge shaft 27 to the center of the hinge shaft 49 and the distance from the center of the hinge shaft 27 to the upper surface of the bearing frame A1 is larger than the distance from the center of the hinge shaft 49 to the farthest point of the bottom surface 12 of the leg B43; (2) after the leg frame B43 is folded, the pressure-bearing frame A1 and the pressure-bearing frame B3 are folded or unfolded, and the leg frame B43 does not contact the upper surface of the pressure-bearing frame A1, which is as follows: the length of the leg frame B43 exceeding the central end surface is required to be within an arc taking the hinge shaft 27 as the center and taking the distance h from the center to the upper surface of the pressure-bearing frame A1 as the radius, if the foot bottom surface 12 has a part exceeding the arc surface, the leg frame B can be cut; since the condition (2) is smaller than the condition (1), the condition (2) is taken as a necessary condition. In the equal-height folding, the leg frame a42 and the leg frame B43 may be arranged in a staggered manner with each other if they are in conflict, and the respective conditions (2) may be satisfied.

In the heightened folding of the fourth embodiment, since the effective staggered length of the leg frame B43 is limited, there is no large freedom as in the equal-height folding, there is a possibility that the non-staggered portions of the leg frame a42 and the leg frame B43 collide at the time of folding, and in order to prevent this, the following requirements are satisfied in addition to the condition (2): (3) the sum of the distance from the center of the hinge axis a48 to the furthest point of the plantar surface 12 of the leg a42 and the distance from the center of the hinge axis B49 to the furthest point of the plantar surface 12 of the leg B43 minus the effective stagger length is less than the distance from the center of the hinge axis a48 to the center of the hinge axis B49 when the pressure-bearing frame A1 and the pressure-bearing frame B3 are in the 180 ° position. Assuming that the difference between the distance from the center of the hinge axis B49 to the furthest point of the plantar surface 12 of the leg B43 and the distance from the plantar surface 12 of the leg B43 is Δ1, the difference between the distance from the center of the a48 to the furthest point of the plantar surface 12 of the leg a42 and the distance from the plantar surface 12 of the leg a42 is Δ2, the effective interlace length is E, and the above-mentioned symbol front for analysis on the bearing frame B3 side is directly used in the same position on the bearing frame A1 side after adding a, the following equations hold h1=l2-R2, h2=l1+r1, l1=l2, ah1=al2-AR 2, ah2=l1+ar1, al2=l2+d, e=d-D, and the above-3 is expressed as: (h2+Δ2+ah2+Δ1-E) < (h1+ah1), each equation is substituted and simplified as: (r1+r2+Δ1+ar1+ar2+Δ2) < d, i.e., the sum of R1, R2, Δ1, AR1, AR2, and Δ2 must not exceed the thickness of the leg a 42.

In the heightened folding of the fifth and sixth embodiments, since the bearing frame B3 is kept horizontal, the leg frame B43 stands on the leg frame a42 via the pad 44 or the extension frame 46, and the three dimensions have the matching requirements, the following requirements are satisfied in addition to the condition (2): (4) the sum of the distance from the center of the hinge axis a48 to the furthest point of the plantar surface 12 of the leg a42 and the distance from the center of the hinge axis B49 to the furthest point of the plantar surface 12 of the leg B43 is smaller than the distance from the center of the hinge axis a48 to the center of the hinge axis B49 when the pressure-bearing frame A1 and the pressure-bearing frame B3 are at the 180 ° position. Let the difference between the distance from the center of the hinge axis B49 to the furthest point of the plantar surface 12 of the leg B43 and the vertical distance from the plantar surface of the leg B43 be Δ1, and the difference between the distance from the center of the hinge axis a48 to the furthest point of the plantar surface 12 of the leg a42 and the vertical distance from the plantar surface 12 of the leg a42 be Δ2. Taking the pressure-bearing frame B3 side as an example, the pressure-bearing frame A1 side still extends by the above symbol and is distinguished by adding a in the foregoing, the following equation is satisfied that h1=l2-r2, h2=l1+r1, l1=l2, ah1=al2-AR 2, ah2=l1+ar1, al2=l2+d, D is the difference in the upper surface lengths of the pressure-bearing frame A1 and the pressure-bearing frame B3, and the above condition (4) is expressed as: (h2+Δ2+ah2+Δ1) < (h1+ah1), each equation is substituted and simplified as: (r1+r2+Δ1+ar1+ar2+Δ2) < D, that is, the sum of R1, R2, Δ1, AR1, AR2, and Δ2 must not exceed the upper surface length difference D of the pressure-bearing frame A1 and the pressure-bearing frame B3.

By the above analysis, the reasonable selection of the central positions of the hinge shafts 48 and 49 is important, and the adoption of the steps of staggered arrangement of the legs, the removal of the interference parts and the like, the interference between the legs and the frame and the interference between the legs can be effectively avoided.

Claims

1. The folding frame comprises a frame body, wherein the frame body comprises a pressure-bearing frame A (1) and a pressure-bearing frame B (3) which are connected through a hinge (2), the pressure-bearing frame A (1) and the pressure-bearing frame B (3) can rotate by 0-180 degrees relative to each other through a hinge shaft (27) of the hinge (2), and the rotating direction of the pressure-bearing frame A (1) and the pressure-bearing frame B (3) rotating by 0-180 degrees relative to each other is to the bottom surfaces of the pressure-bearing frame A (1) and the pressure-bearing frame B (3); the other end of the pressure-bearing frame A (1) is hinged with the leg frame A (42) through a hinge shaft A (48), the other end of the pressure-bearing frame B (3) is hinged with the leg frame B (43) through a hinge shaft B (49), and the pressure-bearing frame A (1) and the pressure-bearing frame B (3) can rotate 0-90 degrees relative to the hinged leg frame A (42) and leg frame B (43) respectively; the leg frame A (42) and the leg frame B (43) rotate relative to the bearing frame A (1) and the bearing frame B (3) by 0-90 degrees respectively in the rotation direction to the bottom surfaces of the bearing frame A (1) and the bearing frame B (3), and the length of the upper surface of the bearing frame A (1) is larger than or equal to that of the upper surface of the bearing frame B (3); when the pressure-bearing frame A (1) and the pressure-bearing frame B (3) are respectively vertical to the leg frame A (42) and the leg frame B (43) hinged with the pressure-bearing frame A (1) and the pressure-bearing frame B (3), the heights of the pressure-bearing frame A (1) and the pressure-bearing frame B (3) are consistent after the pressure-bearing frame A and the pressure-bearing frame B (3) are unfolded to be horizontal; the method is characterized in that: the hinge shaft (27) is arranged at the bottoms of the pressure-bearing frame A (1) and the pressure-bearing frame B (3), the sum of the distance H1 from the side end face (11) of one end, far away from the hinge (2), of the pressure-bearing frame B (3) to the center of the hinge shaft (27) and the distance H from the center of the hinge shaft (27) to the upper surface of the pressure-bearing frame A (1) is equal to the sum of the distance from the center of the hinge shaft B (49) to the upper surface of the pressure-bearing frame B (3) and the distance from the center of the hinge shaft B (49) to the sole face (12) of the leg frame B (43), and the distance from the center of the hinge shaft B (49) to the adjacent side end face (11) is greater than or equal to the distance from the hinge shaft to the outer side face (13) of the leg frame B (43) and the distance from the hinge shaft B (49) to the upper end face (14) of the leg frame B (43); the hinge joint of pressure-bearing frame A (1) and pressure-bearing frame B (3) is equipped with positioning mechanism (8), positioning mechanism (8) are including locating plate (81) and location arch (83), and locating plate (81) are articulated with pressure-bearing frame A (1) outside, and location arch (83) are installed in pressure-bearing frame B (3) outside, are equipped with location breach (82) on locating plate (81), and location arch (83) cooperate with location breach (82).

2. The folding frame of claim 1, wherein: the distance from the center of the hinge shaft B (49) to the near side end face (11) is equal to the distance from the center of the hinge shaft B to the outer side face (13) of the leg frame B (43), and the distance from the center of the hinge shaft B to the upper end face (14) of the leg frame B (43).

3. The folding frame of claim 2, wherein: the distance from the center of the hinge shaft A (48) to the near side end face (11) is equal to the distance from the hinge shaft A to the outer side face (13) of the leg frame A (42) and the distance from the hinge shaft A to the upper end face (14) of the leg frame A (42).

4. A folding frame according to claim 3, characterized in that: the length of the upper surface of the pressure-bearing frame A (1) is equal to that of the upper surface of the pressure-bearing frame B (3), and staggered legs (45) are arranged on the side surfaces of the leg frames B (43) or the leg frames A (42).

5. A folding frame according to claim 3, characterized in that: the length of the upper surface of the pressure-bearing frame A (1) is longer than that of the upper surface of the pressure-bearing frame B (3), and the length difference D between the upper surfaces of the pressure-bearing frame A (1) and the pressure-bearing frame B (3) is smaller than the thickness D of the leg frame A (42); the leg frame B (43) is provided with staggered legs (45), and the effective staggered length is the difference between the thickness D of the leg frame A (42) and the upper surface length difference D.

6. A folding frame according to claim 3, characterized in that: the length of the upper surface of the pressure-bearing frame A (1) is greater than that of the upper surface of the pressure-bearing frame B (3), and the length difference D between the upper surfaces of the pressure-bearing frame A (1) and the pressure-bearing frame B (3) is greater than the thickness D of the leg frame A (42) and less than the thickness D1 of the frame body; a cushion block (44) is arranged on one side of the leg frame A (42) opposite to the leg frame B (43), and the thickness of the cushion block (44) is equal to the difference value between the length difference D of the upper surface and the thickness D of the leg frame A (42).

7. A folding frame according to claim 3, characterized in that: the length of the upper surface of the pressure-bearing frame A (1) is longer than that of the upper surface of the pressure-bearing frame B (3), and the length difference D of the upper surfaces of the pressure-bearing frame A (1) and the pressure-bearing frame B (3) is longer than the thickness D1 of the frame body; the leg frame A (42) is provided with a foldable lengthening frame (46).

8. The folding frame according to any one of claims 1 to 7, characterized in that: and a switching mechanism (7) is arranged between the pressure-bearing frame A (1) and the pressure-bearing frame B (3), the switching mechanism (7) comprises a hinge I (72), a bidirectional hook (73) is hinged to the bottom of the hinge I (72), and the hinge shaft of the hinge I (72) is concentric with the hinge shaft (27).

9. The folding frame according to any one of claims 1 to 7, characterized in that: the frame body is provided with more than one group of flap mechanisms (6), the flap mechanisms (6) comprise a first hinge plate (61) and a flap support assembly, the flap support assembly comprises a folding connecting rod (62) capable of self-locking at 180 degrees, one end of the folding connecting rod (62) is hinged with the frame body, and the other end of the folding connecting rod (62) is provided with a second hinge plate (63); the hinge plate I (61) is hinged with the frame body, the hinge shaft of the hinge plate I (61) close to the hinge (2) is overlapped with the central line of the hinge shaft (27), and the bottom of the hinge plate I is provided with a positioning nail matched with the bidirectional hook (73).

10. The folding frame of claim 9, wherein: the two ends of the frame body are provided with auxiliary leg support frames (5), each auxiliary leg support frame (5) comprises an auxiliary leg hinge plate (51), an auxiliary leg support plate (52) is fixed on each auxiliary leg hinge plate (51), and each auxiliary leg hinge plate (51) is hinged with two side edges of the corresponding pressure-bearing frame A (1) and the corresponding pressure-bearing frame B (3) respectively.

11. A folding table with a folding frame, characterized in that: the folding frame comprises the folding frame as claimed in claim 1, wherein the pressure-bearing frame A (1) and the pressure-bearing frame B (3) are respectively provided with a panel.

12. A folding table with a folding frame, characterized in that: the folding frame comprises the folding frame of claim 8, wherein the pressure-bearing frame A (1) and the pressure-bearing frame B (3) are respectively provided with a panel, and the switching mechanism (7) is provided with a switching panel (75) corresponding to the hinge I (72).

13. A folding table with a folding frame, characterized in that: comprising the folding frame of claim 10, wherein the first hinge plate (61) and the second hinge plate (63) of the flap mechanism (6) are provided with flap panels (65).