WO2005048776A1

WO2005048776A1 - A folded structure of the leg of a folded table

Info

Publication number: WO2005048776A1
Application number: PCT/CN2004/001313
Authority: WO
Inventors: Luhao Leng
Original assignee: Luhao Leng
Priority date: 2003-11-21
Filing date: 2004-11-19
Publication date: 2005-06-02
Also published as: CN2659224Y

Abstract

A folded structure of the leg of a folded table, which includes a quadrate tabletop, and legs. There is a rectangular latch extending downwards at the bottom of the tabletop near the angle of tabletop. There is a leg bayonet inside the base of latch. There is a pin axis vertical to the latch in the middle of the latch. There is a round angle between the lower edge and the outer edge of the latch. The top of a leg is a hollow body that may sleeve the outside of the latch. There is a groove that may buckle with the leg bayonet parallel to the tabletop in the top of the inner side of the hollow body. There is a pivoted aperture near the top of leg. There is a rotational pole in the pivoted aperture. The rotational pole is parallel with the pin axis of the latch. The rotational pole is at the end surface of the hollow body at the ends of legs. There is an eccentric pin axis at the eccentric location of the end surface, and there also is a swing unit, of which both ends rotationally connect with the eccentric pin axis of the rotational pole and the pin axis in the middle of the latch, respectively. The rotational pole connects with a rotational handle. This invention has simpler structure, fewer connected hinge, and safer in operation.

Description

Table leg folding mechanism of folding table

Technical field

The invention relates to a folding table component, in particular to a table leg folding mechanism of a folding table.

Background technique

Whether in the office or home, folding tables are often used. The existing folding tables have a structure that can fold the table legs. There are two main structures: the first type is fixed vertically on both sides of the lower surface of the table top by two table leg frames, and the two table leg frames can be oriented to The central part of the table top is folded and is mainly used as a conference table; the other is that the table leg frame is composed of table legs that cross each other, so as to form a foldable structure, which is mainly used as a personal table.

In the first folding structure described above, the table leg frame and the lower surface of the table top are formed by a hinge to form a foldable structure. In order to keep the table leg in a vertical state when in use, it is usually necessary to place between the table leg frame and the table top. Set a support bar to match the folding of the table leg frame. The support bar should also be a foldable two-part structure. When in use, a locking device must also be provided to keep the two parts of the support bar open. When folding, the lock must be unlocked before folding. The folding structure has the following disadvantages: first, the folding structure is more complicated and costly; second, the support bar is a two-part structure with a large number of connecting hinges, and the abrasion or looseness of each hinge easily causes the table leg frame to be stably supported; third In order to fix the table leg frame in the folded state, a clamping device must be provided at the corresponding position on the bottom surface of the table top to clamp the table leg frame, thereby increasing the complexity of the table top. Fourth, the aforementioned locking device is usually located on the two support poles. It is inconvenient to fold, and it is easy to pinch your hands during folding. '

Therefore, the folding structure of the existing folding table has the disadvantages that need to be improved, and cannot meet the needs of people well.

Summary of the invention

The present invention provides a table leg folding machine for a folding table. The main purpose of the present invention is to overcome the disadvantages that the existing folding table has a complicated structure and a high cost;

The second object of the present invention is to overcome the defect that the existing folding table uses a supporting rod structure, so that there are many hinges connected, and the abrasion or looseness of each hinge can easily cause the table leg frame to be stably supported;

The third object of the present invention is the disadvantages of the inconvenient folding operation of the existing folding table and that it is easy to pinch your hands during the folding process.

The present invention adopts the following technical solution: It includes a rectangular table top and table legs. A rectangular locking lug extending downward is fixed on the bottom surface of the table near the corner of the table. The inside edge of the locking ear is provided with a table leg bayonet.

1

Confirm this The pin is perpendicular to the locking lug, the lower edge of the locking lug forms a rounded corner with the outer side, the upper end of the table leg is a hollow body that can be sleeved outside the locking lug, and the upper end of the inner side wall of the hollow body is provided with a A direction parallel to the desktop is inserted into a slot in the bayonet of the table leg. The table leg is provided with a pivot hole near the upper end. The pivot hole is provided with a pivot lever. The pivot lever is parallel to the pin on the lock ear. An eccentric pin is provided on the end surface of the hollow body at the end of the table leg at an eccentric position, and a swing member is provided in the front portion of the table leg. The two ends of the table can be connected with the eccentric pin on the rotating rod and the pin in the middle of the locking ear. Rotating connection, the rotating rod is connected with a rotating handle, so that the table legs can be displaced and rotated up and down relative to the locking ears.

The distance between the lower edge of the table leg bayonet at the root of the lock ear and the lower edge of the lock ear is equal to the distance between the two vertical sides of the lock ear, and is equal to or slightly less than the inner '^ of the hollow body of the table leg, and the pin on the lock ear The centerline of the shaft intersects the centerline of the table leg, and the radius of the fillet between the lower edge of the lock ear and the outer side is equal to or slightly smaller than the inner diameter of the hollow of the table leg.

The depth of the bayonet of the table leg is h, the distance between the center of the eccentric pin and the center of the rotating rod is r, and the distance between the eccentric pin and the pin on the lock ear is L, then h, r, and L satisfy the inequality

And the inner diameter of the table legs is greater than or equal to the depth of the notch.

A fixing is fixed on the bottom surface of the desktop near the corner of the table, and the locking ear is fixed below the fixing plate. A reinforcing member adapted to the shape is provided in the hollow body at the upper end of the table leg, the reinforcing member is provided with a through hole corresponding to the pivot hole, and the side arm of the reinforcing member is provided with a slot with the end of the table leg The corresponding first notch is provided with a second notch on the other side wall of the reinforcing member opposite to the first notch, and the depth of the first notch and the second notch is greater than the height of the lock ear.

The swinging member is composed of two sheet-like bodies, and the lock ear clip is disposed between the two sheet-like bodies.

The length direction of the rotation handle is perpendicular to the rotation rod, and is perpendicular to the line connecting the center of the rotation rod and the center of the eccentric pin shaft.

A clamping device capable of clamping the rotary handle is provided at the corresponding position on the bottom surface of the desktop.

As can be seen from the above description of the structure of the present invention, compared with the original folding table, the present invention has the following advantages-first, the fixing of the table leg in the use state and folding state of the present invention is completed by the cooperation of the table leg and the locking ear The original folding support bar structure and the clamping mechanism of the bottom of the table facing the table legs are omitted, so the structure is simple and the cost is saved. Second, the hinge structure used in the present invention has fewer structures and its stability is greatly improved. Thirdly, the present invention only needs to pull the rotating handle during the folding operation, the operation is simple, and the operation safety is also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an external structure when the invention is folded and locked;

Fig. 2 is a sectional view taken along the line B-B in Fig. 1;

FIG. 3 is a schematic structural diagram of the present invention folded but in an unlocked state; FIG.

FIG. 4 is a schematic structural diagram of the present invention in a use state and in an unlocked state; FIG.

FIG. 5 is a schematic structural diagram of the present invention in a used state and in a locked state;

Fig. 6 is a cross-sectional view taken along the line A-A in Fig. 1;

FIG. 7 is a partially enlarged view of a position C in FIG. 1;

FIG. 8 is a schematic structural diagram of a rotating handle of the present invention;

8A is a schematic structural view taken in the direction of FIG. 8A;

FIG. 8B is a schematic view of the structure shown in FIG. 8B;

FIG. 9 is a schematic structural diagram of a clamping and rotating hand clamping device according to the present invention;

9A is a cross-sectional view taken along the line 9A-A of FIG. 9;

FIG. 9B is a schematic structural view taken in the direction of FIG. 9B; FIG.

FIG. 10 is a schematic diagram of a connection structure of a lock ear and a fixing plate according to the present invention; FIG.

FIG. 10A is a cross-sectional view taken along the direction of FIG. 10A-A;

FIG. 11 is a schematic structural diagram of a swing member according to the present invention; FIG.

11A is a cross-sectional view taken along the line 11A-A of FIG. 11;

FIG. 12 is a schematic structural diagram of a reinforcing member according to the present invention; FIG.

FIG. 12A is a cross-sectional view taken along the line 12A-A of FIG.

FIG. 12B is a schematic view of the structure in FIG. 12B;

FIG. 13 is a schematic structural diagram of an eccentric pin of a rotating rod of the present invention;

FIG. 13A is a schematic structural view taken in the direction of FIG. 12B;

FIG. 14 is a schematic structural diagram of a T-shaped connecting member connecting a rotating lever and a rotating handle according to the present invention; FIG. 15 is a schematic structural diagram of a table leg and a “9” shaped connecting rod according to the present invention;

15A is a cross-sectional view taken along the line 15A-A of FIG. 15;

Specific embodiment

A specific embodiment of the present invention, referring to FIG. 1 to FIG. 15, includes a rectangular table top 1 and a table leg 2. The bottom surface of the table top 1 is fixed with a fixing plate 4 near the corner of the table. Referring to FIG. 10, the fixing plate 4 passes A rectangular locking lug 3 extending downward is inserted and fixed in the rectangular hole 401 in the middle, and a table leg bayonet 301 is provided on the inner side of the 3 locking lugs. The table leg bayonet 301 has a long shape, and the length direction and The table top is parallel, and a pin 8 perpendicular to the locking lug 3 is provided in the middle of the locking lug 3. The lower edge 302 of the locking lug 3 forms a rounded corner with the outer side 303. The upper end of the table leg 2 is a hollow which can be sleeved outside the locking lug 3. The upper end of the inner side wall of the hollow body is provided with a slot 21 that can be snapped into the table leg bayonet 301 in a direction parallel to the desktop 1, and the lower edge of the table leg bayonet 301 at the base of the lock ears and The distance between the lower edge 302 of the lock ear 3 is equal to the distance between the two vertical sides of the lock ear 3, that is, the length of the lower edge 302, and is equal to or slightly smaller than the inner diameter of the hollow body of the table leg 2. The center line of the pin 8 on the lock ear 3 and The center line of the table leg 2 intersects, and the radius of the fillet between the lower edge 302 and the outer side 302 of the lock ear 3 is equal to or slightly smaller than the inner diameter of the hollow of the table leg 2.

The table leg 2 is provided with a pivot hole 20 near the upper end. The pivot hole 20 is pivotally provided with a rotation rod 5 which is parallel to the pin 8 on the lock ear 3. One end of the rotation rod 5 is located in the hollow body at the end of the table leg 2. An eccentric pin 7 is provided on the end surface at an eccentric position, and the other end thereof extends in the direction of another table leg 2 ′, and the other table leg 2 is located on the same side as the rectangular table top 1 with the table leg 2; A swinging member 6 is rotatably connected to the eccentric pin shaft 7 on the rotating rod 5 and the pin shaft 8 in the middle of the locking lug 3 respectively. Referring to FIG. 11, the swinging member 6 is composed of two pieces that are equal to each other and have the same shape. The shape bodies 601 ′ and 602 are connected by a connecting portion 603 at the bottom thereof, and the lock ear 3 is sandwiched between two small piece bodies 601 and 602. The outline of the piece bodies 601 and 602 is formed by a large circular arc and A smaller arc is formed by two straight lines tangent to it. The radius of the larger arc is slightly smaller than the inner diameter of the hollow body of the table leg 2. The center line of the eccentric pin 7 passes through the center of the smaller arc. The centerline of axis 8 passes through the center of the larger arc.

Referring to FIG. 2, the table leg 2 is in a folded state and is in a locked state. At this time, the table leg bayonet 301 at the base of the lock ear 3 is engaged with the slot 21 at the end of the table leg 2, so the table leg 2 cannot rotate. Let the distance between the center of the eccentric pin 7 and the center of the rotating lever 5 be r, and the center distance between the eccentric pin 7 and the pin 8 be L, then the center distance between the pin 8 and the rotating lever 5 is / L ^2- r ² ; referring to the boudoir 3, the table leg 2 is in a folded state and in an unlocked state. At this time, the center of the eccentric pin 7 is rotated to the line connecting the center of the rotating lever 5 and the pin 8. Since L and r are fixed values, At this time, the center distance between the pin 8 and the rotation lever 5 is L + r; the center of the pin 8 is fixed relative to the desktop 1, so the rotation lever 5 moves to the inside of the desktop relative to the desktop, and the displacement of this movement is s, j3lJ

Since it is in an unlocked state at this time, that is, the table leg 2 is in a rotatable state, the bottom end of the slot 21 on the table leg 2 must be outside the table leg bayonet 301, and the depth of the table leg bayonet 301 is h, then Sh must be satisfied before BP L + r-VL ² -r ² ^ h can the table legs turn. In order to enable the table leg 2 to rotate in the aforementioned unlocked state, the end surface of the table leg 2 must be inside the vertical center line of the pin 8, that is, the inner diameter of the table leg 2 must be greater than or equal to the depth of the slot 21.

Referring to FIG. 4, the table leg 2 is in a used state and in an unlocked state, and at this time the table leg 2 is in a state that can be folded inward. Referring to FIG. 5, the table leg 2 is in a used state and is in a locked state. At this time, the table leg 2 is The hollow body at the end is completely fitted on the lock ear 3, and the two inner side walls of the hollow body of the table leg 2 are closely fitted with the inner and outer sides of the lock ear 3, and therefore cannot be rotated.

It can be seen that FIGS. 2 to 5 show the operation process of the table leg 2 from the folded lock state to the locked state, and the operation process of the rotating lever 5, the eccentric pin 5, and the moving member 6.

The folding structure between the other table leg 2 ′ and the table top 1 is symmetrical to the folding structure of the table leg 2 and the table top 1. Referring to FIG. 7 and FIG. 14, 'the corresponding rotation lever 5 is opposite to the rotation lever 5 The extension ends are fixedly connected to both ends of a cross rod 902 of a "T" connecting member 90, and a rotating handle 9 is fixed to a vertical rod 901 of the "T" connecting member 90. The vertical rod 901 is connected to a part of the rotating handle 9. Bend slightly downward. The length direction of the rotation handle 9 is perpendicular to the rotation levers 5 and 5 ', and is perpendicular to the center line of the rotation lever 5 and the eccentric pin shaft 7. The corresponding position on the bottom surface of the table top 2 is provided with a clamping device 12 capable of clamping a vertical rod 901 fixed to the rotating handle 9. Referring to FIG. 9, the holding device 12 includes a fixing base 1201 and a holding portion 1202 having elasticity. Referring to FIG. 8, the turning handle 9 is provided with a socket 905 along the axis. The longitudinal rod 901 is inserted into the socket 905. The turning handle 9 is provided with a screw hole 904, which can be screwed into the screw hole 904 to make The vertical rod 901 is fixed in the insertion hole 905, and the inside of the rotating handle 9 is provided with a grip portion 903 and a ¾ supporting portion 906. The grip portion 903 is adapted to the shape of the hand and is convenient for holding. The supporting portion 906 allows the rotating handle 9 to When the table legs 2 are folded and locked, a certain distance is maintained from the table top 1, which is convenient for operation. 15 and 6, table legs 2 and 2 'are fixedly connected by a connecting rod 11 having a "9" cross section, and a "9" tail cover is disposed above the rotating rods 5 and 5'. The middle part is provided with a notch 110 to match the rotation of the rotation handle 9.

In order to make the end of the table leg 2 better support the table top '1, a "τ reinforcement 10" is provided in the hollow body at the end of the table leg 2. Referring to FIG. 12, its shape is suitable for the hollow body of the table leg 2. The member 10 is provided with a through hole 1003 corresponding to the pivot hole 20 on the table leg 2 described above, the side member of the reinforcement member 10 is provided with a first notch 1001 corresponding to the slot 21 at the end of the table leg 2, and the reinforcement member 10 is provided with A second notch 1002 is provided on the opposite side wall of the first notch 1001. In order to use the locked state, the two inner side walls of the hollow body of the table leg 2 and the inner and outer sides of the lock ear 3 are closely fitted. The depth of the two notches 1002 must be greater than the height of the locking lug 3, and at the same time, its depth and width must be sufficiently large so as not to hinder the rotation of the swinging member 6. The above is a preferred specific embodiment of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial improvement to the present invention using the design concept of the present invention shall belong to the protection of the present invention. range.

Industrial applicability

The folding mechanism of the table leg of the folding table of the present invention has a reasonable structure design, convenient processing and installation of various components, and can be industrialized for production, and has good industrial applicability.

Claims

Rights request

1. A folding mechanism for a table leg of a folding table, including a rectangular table top and a table leg, which is characterized by: including:

Rectangular locking ears are set on the bottom of the desktop near the corners of the table, the legs of the locking ears have a table leg bayonet, the middle of the locking ears is provided with a pin perpendicular to the locking ears, and the lower edge of the locking ears forms a rounded corner with the outside edge;

The front end of the table leg is a hollow body that can be sleeved outside the lock ear. The upper end of the inner side wall of the hollow body is provided with a slot that can be snapped into the table leg bayonet in a direction parallel to the desktop. A pivot hole is provided on the other side wall below;

The front end of the rotating rod is pivoted in the pivot hole and is parallel to the pin on the locking lug. The end of the rotating rod located on the hollow body at the end of the table leg is provided with an eccentric pin at an eccentric position. Connected with a turning handle;

The swinging member is arranged in the front part of the table leg, and its two ends are respectively rotatably connected with the eccentric pin on the rotating cup and the pin in the middle of the lock ear; the table leg can be displaced and rotated relative to the lock ear.

2. The folding mechanism of a table leg according to claim 1, wherein the distance between the lower edge of the table leg bayonet at the root of the lock ear and the lower edge of the lock ear is equal to the vertical height of the lock ear The distance between the sides is equal to or slightly smaller than the inner diameter of the hollow body of the table leg. The center line of the pin on the lock ear intersects the center line of the table leg. The radius of the fillet between the lower edge of the lock ear and the outer side is equal to or Slightly smaller than the hollow inside diameter of the table library.

3. A folding table ^ table leg folding Λ mechanism according to claim 2, characterized in that: the depth of the table leg bayonet is h, the distance between the center of the eccentric pin shaft and the center of the rotating rod is r, and the eccentric pin shaft and The distance between the pins on the locking lugs is L, then h, r, and ^ satisfy the inequality L + r-VL ² -r ² ^ h, and the inner diameter of the table leg is greater than or equal to the depth of the slot.

4. The folding mechanism for a leg of a folding table according to claim 1, wherein: a fixing plate is fixed near the corner of the bottom of the table, and the locking lugs are fixed below the fixing plate.

5. The folding mechanism of a table leg of a folding table according to claim 1, characterized in that: a hollow body at an upper end portion of the table leg is provided with a reinforcing member adapted to the shape, and the reinforcing member is provided with a reinforcing member The corresponding through hole of the pivot hole, the side arm of the reinforcing member is provided with a first notch corresponding to the slot at the end of the table leg, and the second side of the reinforcing member opposite to the first notch is provided with a second notch. The depth of one notch and the second notch is greater than the height of the lock ear.

6. The folding mechanism for a table leg of a folding table according to claim 1, wherein: The swinging member is composed of two sheet bodies, and the lock ear clip is disposed between the two sheet bodies.

7. The folding mechanism for a leg of a folding table according to claim 1, wherein the length direction of the turning handle is perpendicular to the turning lever, and is perpendicular to the line connecting the center of the turning lever and the center of the eccentric pin.

8. The folding mechanism for a leg of a folding table according to claim 1, wherein a clamping device capable of clamping the rotary handle is provided at a corresponding position on the bottom surface of the table.