CN108095302B - Self-locking cross mechanism for folding table and chair frame and folding bedstead - Google Patents
Self-locking cross mechanism for folding table and chair frame and folding bedstead Download PDFInfo
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- CN108095302B CN108095302B CN201711248430.5A CN201711248430A CN108095302B CN 108095302 B CN108095302 B CN 108095302B CN 201711248430 A CN201711248430 A CN 201711248430A CN 108095302 B CN108095302 B CN 108095302B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B3/00—Folding or stowable tables
- A47B3/02—Folding or stowable tables with foldable cross legs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/02—Underframes
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C19/00—Bedsteads
- A47C19/12—Folding bedsteads
- A47C19/126—Folding bedsteads foldable side to side and head to foot, e.g. umbrella type
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/28—Folding chairs with flexible coverings for the seat or back elements
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
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- Accommodation For Nursing Or Treatment Tables (AREA)
- Special Chairs (AREA)
Abstract
The invention discloses a self-locking crossing mechanism for a folding table and chair frame and a folding bedstead, which comprises a scissor mechanism, two second connecting rods and two third connecting rods, wherein the scissor mechanism comprises two first connecting rods; the first end of the second connecting rod can be rotationally connected with a first connecting rod, the third connecting rod can be rotationally connected with the second connecting rod, the third connecting rod can also be rotationally connected with the other first connecting rod, and the scissor mechanism, the two second connecting rods and the two third connecting rods are matched to form two groups of hinge four-connecting rod mechanisms which are symmetrically arranged; the self-locking cross mechanism is provided with a limiting mechanism for limiting the maximum unfolding angle, and the angle of an included angle formed by the opening downward by the two third connecting rods of the self-locking cross mechanism at the maximum unfolding angle is larger than 180 degrees. It has the following advantages: can be kept in a self-locking state, so that the width and the height are fixed, the flexible cloth can be in a tight state, the flexible cloth is stable and does not topple over, the flexible cloth is more comfortable in use, the stress in the width direction is good, the flexible cloth is firm, and the production process is simple.
Description
Technical Field
The invention relates to a mechanism for folding a table and a chair and a folding bedstead, in particular to a self-locking crossing mechanism for folding the table and chair frames and the folding bedstead.
Background
The existing folding tables and chairs and folding frames, such as the folding frame of CN102599755B, the folding table of CN2538201Y, and the folding chair of CN2441379Y, all comprise a scissor mechanism comprising two links rotatably connected together. It has the following disadvantages: 1. the folding table and chair frame and the folding bed frame limit the maximum unfolding angle through cloth (bed surface cloth, chair surface cloth or table surface cloth) and maintain the folding table and chair frame in an unfolding state, and the cloth is easy to damage; 2. because the cloth tightness is easy to change due to the movement of a user, the phenomenon of loose and collapse can occur, and the use is uncomfortable; 3. the folding table and chair frame and the folding bedstead are easy to fold and move when being unfolded, are unstable and easy to shake at will, and can be folded accidentally to cause the falling danger in use; 4. even if a manual safety lock catch is added on the folding table and chair frame and the folding bedstead, the use is inconvenient, the user often forgets to lock the safety lock catch after unfolding, and the user forgets to unlock the safety lock catch when folding, so that the folding table and chair frame and the folding bedstead are damaged by forced folding.
Disclosure of Invention
The invention provides a mechanism for folding a table and a chair and a folding bedstead, which overcomes the defects of a crossing mechanism in the prior art.
One of the adopted technical schemes for solving the technical problems is as follows:
the self-locking crossing mechanism for the folding table and chair frame and the folding bedstead comprises a scissor mechanism, wherein the scissor mechanism comprises two first connecting rods which can be rotationally connected together; the self-locking crossing mechanism also comprises two second connecting rods and two third connecting rods; the first end of the second connecting rod can be rotationally connected with a first connecting rod, the third connecting rod can be rotationally connected with the second connecting rod, the third connecting rod can also be rotationally connected with the other first connecting rod, and the scissor mechanism, the two second connecting rods and the two third connecting rods are matched to form two groups of hinge four-connecting rod mechanisms which are symmetrically arranged; the self-locking cross mechanism is provided with a limiting mechanism for limiting the maximum unfolding angle, and the angle of an included angle formed by the opening downward by the two third connecting rods of the self-locking cross mechanism at the maximum unfolding angle is larger than 180 degrees.
In one embodiment: the first connecting rod is provided with an upper section and a lower section which are positioned above and below the rotation point of the scissor mechanism; the first end of the second connecting rod can be rotatably connected to the lower section of one first connecting rod, and the third connecting rod can be rotatably connected to the upper section of the other first connecting rod.
In one embodiment: the limiting mechanism is arranged between the first connecting rod and the third connecting rod which are connected in a rotating way.
In one embodiment: the first end of the third connecting rod can be rotationally connected with the second connecting rod, and the limiting mechanism comprises a propping piece fixedly arranged at the second end of the third connecting rod, and limiting is realized by propping the first connecting rod from top to bottom through the propping piece.
In one embodiment: the third connecting rod comprises two rod pieces, the first ends of the two rod pieces are clamped with the second connecting rod, and the first rotating shaft is arranged to pass through the two rod pieces and the second connecting rod to rotationally connect the two rod pieces and the second connecting rod together; the two rod pieces are clamped at two sides of the other first connecting rod and are provided with a second rotating shaft which penetrates through the two rod pieces and the other first connecting rod to rotationally connect the two rod pieces and the other first connecting rod together; the propping piece is fixedly connected between the second ends of the two rod pieces.
The second technical scheme adopted for solving the technical problems is as follows:
the folding bedstead comprises a plurality of upper connectors and lower connectors which are equal to the upper connectors, wherein the number of the self-locking cross mechanisms is a plurality, and the self-locking cross mechanisms are as follows: the second ends of the second connecting rods of every two adjacent at least self-locking cross mechanisms can be rotationally connected with one upper connector, and the lower ends of the first connecting rods of every two adjacent at least self-locking cross mechanisms can be rotationally connected with one lower connector.
In one embodiment: the plurality of self-locking cross mechanisms are connected and arranged into a shape like a Chinese character 'tian' or a Chinese character 'ri' or a Chinese character 'kou' through the upper connector and the lower connector.
The third technical scheme adopted for solving the technical problems is as follows:
the folding bedstead comprises a self-locking cross mechanism for folding the desk and chair frame and the folding bedstead, and comprises a plurality of upper connectors, lower connectors which are equal to the upper connectors and a plurality of scissor mechanisms, wherein the number of the self-locking cross mechanism is at least one; the self-locking crossing mechanism is provided with two upper ends respectively corresponding to the second ends of the second connecting rods and two lower ends respectively corresponding to the lower ends of the first connecting rods, the scissor mechanism comprises two fourth connecting rods which can be rotationally connected together, and the scissor mechanism is also provided with two upper ends respectively corresponding to the upper ends of the fourth connecting rods and two lower ends respectively corresponding to the lower ends of the fourth connecting rods; each adjacent at least two upper ends can be rotationally connected with one upper connector, and each adjacent at least two lower ends can be rotationally connected with one lower connector.
In one embodiment: the at least one self-locking cross mechanism and the plurality of scissor mechanisms are connected and arranged into a shape like a Chinese character 'tian' or a Chinese character 'ri' or a Chinese character 'kou' through the upper connector and the lower connector.
In one embodiment: the three-way type solar energy self-locking cross mechanism comprises four self-locking cross mechanisms and three shear mechanisms, wherein the four self-locking cross mechanisms are divided into two rows, the three shear mechanisms are connected between the two rows of self-locking cross mechanisms, and the four self-locking cross mechanisms and the three shear mechanisms form a Chinese character 'ri'.
The fourth technical scheme adopted for solving the technical problems is as follows:
the folding table and chair frame comprises the self-locking crossing mechanism for folding table and chair frames and folding bed frames and at least one self-locking crossing mechanism.
In one embodiment: the self-locking cross mechanism comprises a plurality of upper connectors, lower connectors equal to the upper connectors and a plurality of scissor mechanisms, wherein the number of the self-locking cross mechanisms is at least one; the self-locking crossing mechanism is provided with two upper ends respectively corresponding to the second ends of the second connecting rods and two lower ends respectively corresponding to the lower ends of the first connecting rods, the scissor mechanism comprises two fourth connecting rods which can be rotationally connected together, and the scissor mechanism is also provided with two upper ends respectively corresponding to the upper ends of the fourth connecting rods and two lower ends respectively corresponding to the lower ends of the fourth connecting rods; each adjacent at least two upper ends can be rotationally connected with one upper connector, and each adjacent at least two lower ends can be rotationally connected with one lower connector.
In one embodiment: the self-locking cross mechanism comprises two self-locking cross mechanisms and two shearing mechanisms, wherein the upper end of each adjacent second connecting rod and the upper end of each adjacent fourth connecting rod can be rotationally connected with one upper connector, and the lower end of each adjacent first connecting rod and the lower end of each adjacent fourth connecting rod can be rotationally connected with one lower connector.
In one embodiment: the two backrest rods are fixedly connected to the lower connectors at the rear sides, and the upper ends of the backrest rods can slide through the corresponding upper connectors at the rear sides.
In one embodiment: the self-locking cross mechanism is positioned at the front side, and the second end of the second connecting rod of the self-locking cross mechanism extends upwards and extends out of the upper connector to form the grab bar.
In one embodiment: the self-locking cross mechanism comprises two front supporting legs, two rear supporting legs, two seat rods and two self-locking cross mechanisms, wherein the rear ends of the seat rods can be rotatably connected with the rear supporting legs, the middle front parts of the seat rods can be rotatably connected with the front supporting legs, and the rear supporting legs are movably connected with the front supporting legs;
a self-locking crossing mechanism: the upper ends of the two second connecting rods can be respectively and rotatably connected with the two front supporting legs, and the lower ends of the two first connecting rods can be respectively and rotatably connected with the two rear supporting legs;
another self-locking crossing mechanism: the upper ends of the two second connecting rods can be respectively connected with the front ends of the two seat rods in a rotating way, and the lower ends of the two first connecting rods can be respectively connected with the two front supporting legs in a rotating way.
In one embodiment: the front support leg is connected with a sliding seat in a sliding way, and the upper end of the rear support leg can be rotationally connected with the sliding seat; the sliding seat is positioned between the connecting position of the front supporting leg and the seat rod and the connecting position of the upper ends of the front supporting leg and the second connecting rod.
In one embodiment: the self-locking cross mechanism is positioned at the front side, and the second end of the second connecting rod of the self-locking cross mechanism extends upwards and extends out of the upper connector to form the grab bar.
Compared with the background technology, the technical proposal has the following advantages:
the angle of the downward included angle of the opening formed by the two third connecting rods of the self-locking cross mechanism at the maximum unfolding angle is larger than 180 degrees, the self-locking cross mechanism is provided with a limiting mechanism for limiting the maximum unfolding angle, the included angle is prevented from being continuously increased, the mechanism can be kept in a self-locking state, so that the bed width or the chair width or the table width is fixed, the bed height or the chair height or the table height is also fixed, and therefore flexible cloth (such as bed cloth, chair cloth or tabletop cloth) is in a tight state, and is stable and not toppled, more comfortable in use, good in stress in the width direction, firm and simple in production process.
The self-locking cross mechanism is matched with the existing scissor mechanism, so that products with more length-width ratios can be designed.
The limiting mechanism comprises a propping piece fixedly arranged at the other end of the third connecting rod, and the limiting mechanism is propped against the first connecting rod from top to bottom through the propping piece to realize limiting, so that self-locking is stable and reliable.
The first ends of the two rod pieces are clamped with the second connecting rod and are provided with a first rotating shaft which penetrates through the two rod pieces and the second connecting rod to rotationally connect the two rod pieces and the second connecting rod together; the two rod pieces are clamped at two sides of the other first connecting rod and are provided with a second rotating shaft which penetrates through the two rod pieces and the other first connecting rod to rotationally connect the two rod pieces and the other first connecting rod together; the propping piece is fixedly connected between the second ends of the two rod pieces, so that the stability is high, the processing is convenient, and the structure is simple.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic perspective view of a self-locking support mechanism in an open state.
Fig. 2 is a schematic perspective view of the self-locking support mechanism, and the self-locking support mechanism is in a semi-folded state.
Fig. 3 is a perspective view of the self-locking support mechanism in a folded state.
Fig. 4 is one of the schematic diagrams of the self-locking support mechanism, when the mechanism is in a non-self-locking state.
Fig. 5 is a second schematic diagram of a self-locking support mechanism, with the mechanism in a critical state ("mechanism dead center").
Fig. 6 is a third schematic diagram of the self-locking support mechanism, with the mechanism in a self-locking state.
Fig. 7 is a perspective view of a foldable bed frame.
Fig. 8 is a perspective view of another foldable bed frame.
Fig. 9 is a perspective view of a folding chair frame.
Fig. 10 is a perspective view of another folding chair frame.
Figure 11 is a schematic perspective view of a folding table frame.
Detailed Description
Referring to fig. 1 to 6, a self-locking crossing mechanism 10 for a folding table and chair frame and a folding bed frame comprises a scissor mechanism 11, two second connecting rods 12 and two third connecting rods 13. The scissor mechanism 11 comprises two first links 111 rotatably connected together; the lower end of the second connecting rod 12 can be rotatably connected with a first connecting rod 111, the first end of the third connecting rod 13 can be rotatably connected with the second connecting rod 12, the third connecting rod 13 can also be rotatably connected with another first connecting rod 111, and the scissor mechanism 11, the two second connecting rods 12 and the two third connecting rods 13 are matched to form two groups of symmetrically arranged hinge four-bar mechanisms; the self-locking crossing mechanism is provided with a limiting mechanism 14 for limiting the maximum unfolding angle, and the angle of the downward included angle of the opening formed by the two third connecting rods 13 of the self-locking crossing mechanism 10 at the maximum unfolding angle is more than 180 degrees, such as 185-250 degrees, such as 195-205 degrees.
The first link 111 has an upper section and a lower section located above and below the point of rotation of the scissor mechanism 11, the lower section having a length greater than the upper section. The first end (lower end in the drawing) of the second link 12 is rotatably connected to the lower section of one first link 111, and the third link 13 is rotatably connected to the upper section of the other first link 111.
The limiting mechanism 14 is disposed between the first connecting rod 111 and the third connecting rod 13, which are rotatably connected, and the limiting mechanism 14 includes a propping member fixedly disposed at the second end of the third connecting rod 13, and the limiting member is propped against the first connecting rod 111 from top to bottom to realize limiting. In this embodiment: the third connecting rod 13 comprises two rod pieces, the first ends of the two rod pieces are clamped with the second connecting rod 12, and a first rotating shaft is arranged to pass through the two rod pieces and the second connecting rod 12 so as to rotationally connect the two rod pieces and the second connecting rod together; the two rod pieces are clamped at two sides of the other first connecting rod 111 and are provided with a second rotating shaft which passes through the two rod pieces and the other first connecting rod 111 to rotationally connect the two rod pieces and the other first connecting rod 111 together; the propping piece is fixedly connected between the second ends of the two rod pieces, and preferably, the bottom surface of the propping piece is concavely provided with a groove matched with the first connecting rod.
Wherein: the angle of an included angle a formed by the opening downward by the two third connecting rods 13 of the self-locking crossing mechanism 10 at the maximum unfolding angle is larger than 180 degrees, as shown in fig. 4, 5 and 6, when the hinge four-rod mechanism changes from a folded state to an unfolded state, the hinge four-rod mechanism passes through a 'mechanism dead point' (when a is smaller than 180 degrees, as shown in fig. 4, the mechanism is in a non-self-locking state, when F1 or F2 force is applied, the structure is automatically folded, S becomes smaller and H becomes larger), namely, a is smaller than 180 degrees in fig. 4, a=180 degrees in fig. 5, a >180 degrees in fig. 6, a limiting mechanism 14 is arranged between the first connecting rod 111 and the third connecting rod 13 which are connected in a rotating way, so that the included angle a is prevented from being continuously increased, and the mechanism can be kept in the self-locking state no matter of applying F1 or F2 mechanism, namely, the mechanism cannot move between the upper ends of the two second connecting rods, so that the width S of the mechanism is fixed, the mechanism height H is also fixed, and the cloth 20 on the mechanism (like, the corresponding cloth is similar to the bed cloth, and the bed cloth is similarly easy to tilt and the bed cloth) is not stable; when the folding device is folded, the lower sections of the two first connecting rods can be unlocked and folded by pressing the lower sections by hands.
When folding: the unlocking is achieved by pressing the lower sections of the two first links 111 by hand, as shown in fig. 1 and 2; until the crossing mechanism is fully collapsed, as shown in fig. 3. Of course, the upper sections of the two first links 111 may be pressed by hand during folding, or the two third links may be lifted, but this mode is inconvenient due to the interference of the cloth folding.
Please refer to fig. 7, which is a perspective view of a foldable bed frame. The self-locking cross mechanism comprises seven self-locking cross mechanisms 10, six upper connectors 30 and six lower connectors 40, wherein the seven self-locking cross mechanisms 10 are as follows: four self-locking crossing mechanisms 10 are arranged in two rows, and the other three self-locking crossing mechanisms 10 are connected between the two rows of self-locking crossing mechanisms 10 to form a Chinese character 'ri'. Wherein: the second ends of the second links 12 of each adjacent at least two self-locking cross mechanisms 10 are rotatably connected to one of the upper connectors 30, and the lower ends of the first links 111 of each adjacent at least two self-locking cross mechanisms 10 are rotatably connected to one of the lower connectors 40. The bed cloth is connected to the six upper connectors 30.
Please refer to fig. 8, which is a schematic perspective view of another foldable bed frame, which is different from the previous foldable bed frame in that: the three-way cross-connecting mechanism comprises four self-locking cross mechanisms 10 and three shear-type mechanisms 50, wherein the shear-type mechanisms comprise two fourth connecting rods 51 which can be rotatably connected together, the four self-locking cross mechanisms 10 are divided into two rows, the three shear-type mechanisms 50 are connected between the two rows of self-locking cross mechanisms, and the four self-locking cross mechanisms and the three shear-type mechanisms form a Chinese character 'ri'. The upper end of the fourth connecting rod 51 of the scissor mechanism 50 positioned at the front and rear sides is connected with the upper end of the second connecting rod 12 of the self-locking cross mechanism 10 through the upper connector 30, and the upper end of the fourth connecting rod 51 of the scissor mechanism 50 positioned at the middle side is connected with the upper ends of the second connecting rods 12 of the two self-locking cross mechanisms 10 through the upper connector 30; the lower end of the fourth link 51 of the scissors mechanism 50 located on the front and rear sides is connected to the lower end of the first link 111 of the self-locking crossing mechanism 10 by the lower connector 40, and the lower end of the fourth link 51 of the scissors mechanism 50 located on the middle side is connected to the lower ends of the first links 111 of the two self-locking crossing mechanisms 10 by the lower connector 40. In the present embodiment, four self-locking cross mechanisms and three scissor mechanisms are taken as an example for explanation, and any one or more scissor mechanisms in the existing folding bed frame using the scissor mechanisms can be replaced by the self-locking cross mechanisms of the present embodiment.
Please refer to fig. 9, which is a perspective view of a foldable chair frame. Comprises two self-locking cross mechanisms 10, two scissor mechanisms 50, four upper connectors 30 and four lower connectors 40, wherein the scissor mechanisms comprise two fourth connecting rods 51 which can be rotatably connected together; the two self-locking crossing mechanisms 10 and the two scissor mechanisms 50 are enclosed into a shape of a Chinese character 'kou', the upper end of each adjacent second connecting rod 12 and the upper end of each adjacent fourth connecting rod 51 can be rotatably connected with one upper connector 30, and the lower end of each adjacent first connecting rod 111 and the lower end of each adjacent fourth connecting rod 51 can be rotatably connected with one lower connector 40; the two self-locking intersecting mechanisms 10 are arranged back and forth, and the two scissor mechanisms 50 are arranged left and right, but not limited thereto, and the two scissor mechanisms 50 and the two self-locking intersecting mechanisms 10 may be arranged back and forth as needed. If necessary, two backrest bars 60 and two grab bars 70 are also included; the lower end of the backrest rod 60 is fixedly connected to the lower connector 40 at the rear side, and the upper end of the backrest rod 60 can slide through the corresponding upper connector 30 at the rear side; the second end of the second link 12 of the self-locking crossing mechanism 10 located at the front side extends upward and protrudes out of the upper joint 30 to constitute the grab bar 70 described above. The chair cloth is connected to the four upper connecting heads. Any one or more than one scissor mechanism in the existing folding chair frame adopting the scissor mechanism can be replaced by adopting the self-locking cross mechanism of the embodiment.
Please refer to fig. 10, which is a perspective view of another foldable chair frame. Comprising two front legs 81, two rear legs 82, two seat bars 83 and two self-locking crossing mechanisms 10 described above; the two self-locking crossing mechanisms 10 are arranged back and forth; the rear end of the seat rod 83 can be rotatably connected with the rear supporting leg 82, the middle front part of the seat rod 83 can be rotatably connected with the front supporting leg 81, the front supporting leg 81 is slidably connected with the sliding seat 84, and the upper end of the rear supporting leg 82 can be rotatably connected with the sliding seat 84; a self-locking crossing mechanism 10 on the rear side: the upper ends of the two second connecting rods 12 are respectively rotatably connected to the two front supporting legs 81, and the lower ends of the two first connecting rods 111 are respectively rotatably connected to the two rear supporting legs 82; a self-locking crossing mechanism 10 on the front side: the upper ends of the two second links 12 are respectively rotatably connected to the front ends of the two seat bars 83, and the lower ends of the two first links 111 are respectively rotatably connected to the two front legs 81. The slide 84 is located between the junction of the front leg and the seat post and the junction of the front leg and the upper end of the second link. The second end of the second link of the self-locking cross mechanism on the front side extends upward and protrudes out of the upper connector to form the grab bar.
Please refer to fig. 11, which is a perspective view of a foldable table frame. Comprises two self-locking cross mechanisms 10, two scissor mechanisms 50, four upper connectors 30 and four lower connectors 40, wherein the scissor mechanisms comprise two fourth connecting rods 51 which can be rotatably connected together; the two self-locking crossing mechanisms 10 and the two scissor mechanisms 50 are enclosed into a shape of a Chinese character 'kou', the upper end of each adjacent second connecting rod 12 and the upper end of each adjacent fourth connecting rod 51 can be rotatably connected with one upper connector 30, and the lower end of each adjacent first connecting rod 111 and the lower end of each adjacent fourth connecting rod 51 can be rotatably connected with one lower connector 40; the two self-locking intersecting mechanisms 10 are arranged back and forth, and the two scissor mechanisms 50 are arranged left and right, but not limited thereto, and the two scissor mechanisms 50 and the two self-locking intersecting mechanisms 10 may be arranged back and forth as needed. The tablecloth is connected to four upper connectors. Any one or more than one scissor mechanism in the folding table frame adopting the scissor mechanism can be replaced by adopting the self-locking cross mechanism of the embodiment.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (18)
1. The self-locking crossing mechanism for the folding table and chair frame and the folding bedstead comprises a scissor mechanism, wherein the scissor mechanism comprises two first connecting rods which can be rotationally connected together; the method is characterized in that: the self-locking crossing mechanism also comprises two second connecting rods and two third connecting rods; the first end of the second connecting rod can be rotationally connected with a first connecting rod, the third connecting rod can be rotationally connected with the second connecting rod, the third connecting rod can also be rotationally connected with the other first connecting rod, and the scissor mechanism, the two second connecting rods and the two third connecting rods are matched to form two groups of hinge four-connecting rod mechanisms which are symmetrically arranged; the self-locking cross mechanism is provided with a limiting mechanism for limiting the maximum unfolding angle, and the angle of an included angle formed by the opening downward by the two third connecting rods of the self-locking cross mechanism at the maximum unfolding angle is larger than 180 degrees.
2. The self-locking crossing mechanism for a folding table and chair frame and folding bed frame according to claim 1, wherein: the first connecting rod is provided with an upper section and a lower section which are positioned above and below the rotation point of the scissor mechanism; the first end of the second connecting rod can be rotatably connected to the lower section of one first connecting rod, and the third connecting rod can be rotatably connected to the upper section of the other first connecting rod.
3. The self-locking crossing mechanism for a folding table and chair frame and folding bed frame according to claim 1, wherein: the limiting mechanism is arranged between the first connecting rod and the third connecting rod which are connected in a rotating way.
4. A self-locking crossing mechanism for a collapsible table and chair rack and collapsible bed frame as claimed in claim 3, wherein: the first end of the third connecting rod can be rotationally connected with the second connecting rod, and the limiting mechanism comprises a propping piece fixedly arranged at the second end of the third connecting rod, and limiting is realized by propping the first connecting rod from top to bottom through the propping piece.
5. The self-locking crossing mechanism for a collapsible table and chair rack and collapsible bed frame as claimed in claim 4, wherein: the third connecting rod comprises two rod pieces, the first ends of the two rod pieces are clamped with the second connecting rod, and the first rotating shaft is arranged to pass through the two rod pieces and the second connecting rod to rotationally connect the two rod pieces and the second connecting rod together; the two rod pieces are clamped at two sides of the other first connecting rod and are provided with a second rotating shaft which penetrates through the two rod pieces and the other first connecting rod to rotationally connect the two rod pieces and the other first connecting rod together; the propping piece is fixedly connected between the second ends of the two rod pieces.
6. Folding bed frame comprising a self-locking crossing mechanism for folding table and chair frames and folding bed frames according to any of claims 1 to 5, characterized in that: the self-locking cross mechanism comprises a plurality of upper connectors and lower connectors which are equal to the upper connectors, wherein the number of the self-locking cross mechanisms is multiple, and the self-locking cross mechanisms are as follows: the second ends of the second connecting rods of every two adjacent at least self-locking cross mechanisms can be rotationally connected with one upper connector, and the lower ends of the first connecting rods of every two adjacent at least self-locking cross mechanisms can be rotationally connected with one lower connector.
7. The folding bed frame according to claim 6, wherein: the plurality of self-locking cross mechanisms are connected and arranged into a shape like a Chinese character 'tian' or a Chinese character 'ri' or a Chinese character 'kou' through the upper connector and the lower connector.
8. Folding bed frame comprising a self-locking crossing mechanism for folding table and chair frames and folding bed frames according to any of claims 1 to 5, characterized in that: the self-locking cross mechanism comprises a plurality of upper connectors, lower connectors equal to the upper connectors and a plurality of scissor mechanisms, wherein the number of the self-locking cross mechanisms is at least one; the self-locking crossing mechanism is provided with two upper ends respectively corresponding to the second ends of the second connecting rods and two lower ends respectively corresponding to the lower ends of the first connecting rods, the scissor mechanism comprises two fourth connecting rods which can be rotationally connected together, and the scissor mechanism is also provided with two upper ends respectively corresponding to the upper ends of the fourth connecting rods and two lower ends respectively corresponding to the lower ends of the fourth connecting rods; each adjacent at least two upper ends can be rotationally connected with one upper connector, and each adjacent at least two lower ends can be rotationally connected with one lower connector.
9. The folding bed frame according to claim 8, wherein: the at least one self-locking cross mechanism and the plurality of scissor mechanisms are connected and arranged into a shape like a Chinese character 'tian' or a Chinese character 'ri' or a Chinese character 'kou' through the upper connector and the lower connector.
10. The folding bed frame according to claim 8, wherein: the three-way type solar energy self-locking cross mechanism comprises four self-locking cross mechanisms and three shear mechanisms, wherein the four self-locking cross mechanisms are divided into two rows, the three shear mechanisms are connected between the two rows of self-locking cross mechanisms, and the four self-locking cross mechanisms and the three shear mechanisms form a Chinese character 'ri'.
11. Folding table and chair frame comprising a self-locking crossing mechanism for folding table and chair frame and folding bed frame according to any of claims 1 to 5, characterized in that: comprising at least one self-locking crossing mechanism.
12. A collapsible table and chair rack as claimed in claim 11, wherein: the self-locking cross mechanism comprises a plurality of upper connectors, lower connectors equal to the upper connectors and a plurality of scissor mechanisms, wherein the number of the self-locking cross mechanisms is at least one; the self-locking crossing mechanism is provided with two upper ends respectively corresponding to the second ends of the second connecting rods and two lower ends respectively corresponding to the lower ends of the first connecting rods, the scissor mechanism comprises two fourth connecting rods which can be rotationally connected together, and the scissor mechanism is also provided with two upper ends respectively corresponding to the upper ends of the fourth connecting rods and two lower ends respectively corresponding to the lower ends of the fourth connecting rods; each adjacent at least two upper ends can be rotationally connected with one upper connector, and each adjacent at least two lower ends can be rotationally connected with one lower connector.
13. A collapsible table and chair rack as claimed in claim 12, wherein: the self-locking cross mechanism comprises two self-locking cross mechanisms and two shearing mechanisms, wherein the upper end of each adjacent second connecting rod and the upper end of each adjacent fourth connecting rod can be rotationally connected with one upper connector, and the lower end of each adjacent first connecting rod and the lower end of each adjacent fourth connecting rod can be rotationally connected with one lower connector.
14. A collapsible table and chair rack as claimed in claim 13, wherein: the two backrest rods are fixedly connected to the lower connectors at the rear sides, and the upper ends of the backrest rods can slide through the corresponding upper connectors at the rear sides.
15. A collapsible table and chair rack as claimed in claim 13, wherein: the self-locking cross mechanism is positioned at the front side, and the second end of the second connecting rod of the self-locking cross mechanism extends upwards and extends out of the upper connector to form the grab bar.
16. A collapsible table and chair rack as claimed in claim 11, wherein: the self-locking cross mechanism comprises two front supporting legs, two rear supporting legs, two seat rods and two self-locking cross mechanisms, wherein the rear ends of the seat rods can be rotatably connected with the rear supporting legs, the middle front parts of the seat rods can be rotatably connected with the front supporting legs, and the rear supporting legs are movably connected with the front supporting legs;
a self-locking crossing mechanism: the upper ends of the two second connecting rods can be respectively and rotatably connected with the two front supporting legs, and the lower ends of the two first connecting rods can be respectively and rotatably connected with the two rear supporting legs;
another self-locking crossing mechanism: the upper ends of the two second connecting rods can be respectively connected with the front ends of the two seat rods in a rotating way, and the lower ends of the two first connecting rods can be respectively connected with the two front supporting legs in a rotating way.
17. A collapsible table and chair rack as claimed in claim 16, wherein: the front support leg is connected with a sliding seat in a sliding way, and the upper end of the rear support leg can be rotationally connected with the sliding seat; the sliding seat is positioned between the connecting position of the front supporting leg and the seat rod and the connecting position of the upper ends of the front supporting leg and the second connecting rod.
18. A collapsible table and chair rack as claimed in claim 17, wherein: the self-locking cross mechanism is positioned at the front side, and the second end of the second connecting rod of the self-locking cross mechanism extends upwards and extends out of the upper connector to form the grab bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248430.5A CN108095302B (en) | 2017-12-01 | 2017-12-01 | Self-locking cross mechanism for folding table and chair frame and folding bedstead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248430.5A CN108095302B (en) | 2017-12-01 | 2017-12-01 | Self-locking cross mechanism for folding table and chair frame and folding bedstead |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108095302A CN108095302A (en) | 2018-06-01 |
| CN108095302B true CN108095302B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711248430.5A Active CN108095302B (en) | 2017-12-01 | 2017-12-01 | Self-locking cross mechanism for folding table and chair frame and folding bedstead |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150263B (en) * | 2019-12-31 | 2022-01-21 | 河北富振实业有限责任公司 | Bunk bed with multifunctional table |
| CN115005588A (en) * | 2021-12-23 | 2022-09-06 | 广东轻工职业技术学院 | Table capable of automatically taking down and lowering |
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| Publication number | Publication date |
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| CN108095302A (en) | 2018-06-01 |
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