CN2659224Y - Table leg folding mechanism of folding table - Google Patents

Abstract

A table legs folding device of the folding table which comprises a rectangular desktop, table legs, a desktop bottom close to the table angle is fixed provided with a downward extension rectangular locking ear. The inner edge of the locking ear is provided with the table legs blocking mouth; and the middle of the locking ear is installed with an axes pin which is vertical with the locking ear. The bottom of the locking ear and the lateral formed a round angle; the top of the table legs is the hollow cavity which can be covered out of the locking ear; the top end of the side wall of the cavity is provided with a groove mouth which can be along the direction of paralleled with the desktop inserting and buttoning in the table legs blocking mouth. The table legs next to the top has a hub hole; the hub hole is provided with a rotating rod; the rotating rod is parallel with the pin axes of the locking ear; the rotating rod is placed on the surface of the hollow body of the table legs ends; an eccentric pin and a swing part is arranged in the eccentric position; both ends are rotating connected eccentric pin of the rotating rod and the pin axes of the locking ear; and the rotating rod is connected with the rotating handle. The utility model has simple structure, less hinging and the higher operation.

Description

A kind of table leg fold mechanism of folding table

Technical field

The utility model relates to the table leg fold mechanism of folding table parts, particularly a kind of folding table.

Background technology

No matter in office or family, often can use folding table.Existing folding table all has the folding structure of the table leg of making, and mainly contains two kinds of structures: first kind is fixed in the both sides of desktop lower surface vertically by two table leg supports, and two table leg supports can be folding to the middle part of desktop, mainly as conference table; Another kind is that table leg support is made up of the table leg that crosses one another, thereby forms folding structure, and is main as individual's table.

In above-mentioned first kind of foldable structure; table leg support and desktop lower surface form folding structure by hinge; in order to make its table leg can remain in vertical state when the user mode; usually also support bar will be set between table leg support and desktop, adapt with the folding of table leg support, this support bar also should be folding two-part structure; when user mode; also must be provided with locking device so that two parts of support bar keep softened state, when folding, must just can fold by this locking device of first release.This foldable structure has following shortcoming: at first, this foldable structure is comparatively complicated, and cost is higher; Secondly, support bar is a two-part structure, and it is more to connect hinge, and the wearing and tearing of each hinge or the loosening table leg support that easily causes can not stable support; The 3rd, be fixed in folded state in order to make table leg support, the relevant position of desktop bottom surface must be provided with clamping device, with the clamping table leg support, thereby has increased the complexity of desktop; The 4th, aforementioned locking device is usually located between support bar two parts, so the folding operation inconvenience, and easily hand folding in folding process.

Therefore, the existence of the foldable structure of existing folding table waits improved shortcoming, can not adapt to people's demand well.

The utility model content

The utility model provides a kind of table leg fold mechanism of folding table, and it is comparatively complicated that main purpose of the present utility model is to overcome existing folding table structure, the defective that cost is higher;

Second purpose of the present utility model is to overcome existing folding table owing to adopt supporting bar structure, thereby it is more to connect hinge, the wearing and tearing of each hinge or looseningly easily cause the defective that table leg support can not stable support;

The 3rd purpose of the present utility model is existing folding table folding operation inconvenience, and the defective of easy hand folding in folding process.

The utility model adopts following technical scheme: comprise rectangular desktop, table leg, the desktop bottom surface is installed with the rectangle lock ear of downward extension near place, table angle, this lock basal part of the ear portion inner side edge is provided with the table leg bayonet socket, lock ear middle part be provided with one with the straight bearing pin of lock ear-lobe, lock ear lower limb becomes a fillet with outer side edges, the table leg upper end is for being sheathed on the outer ducted body of lock ear, the inner sidewall upper portion of this ducted body is provided with one can be in direction eye-splice the notch in table leg bayonet socket in parallel with desktop, table leg is provided with a pivot hole near the upper end, a dwang is pivoted in this pivot hole, dwang is parallel with the bearing pin on the lock ear, dwang is positioned on the end face of table leg end ducted body and is provided with an eccentric pin shaft in eccentric position, other has a swing component, its two ends respectively with dwang on eccentric pin shaft and the bearing pin at lock ear middle part be rotatably connected, dwang is connected with a turning handle.

The distance that the distance of the lower limb of the table leg bayonet socket of described lock basal part of the ear portion and lock ear lower limb equals to lock ear two vertical edges, and be equal to or slightly less than the internal diameter of table leg ducted body, the center line of the bearing pin on the lock ear and the center line of table leg intersect, and the radius of the fillet between lock ear lower limb and the outer side edges is equal to or slightly less than table leg ducted body internal diameter.

The degree of depth of table leg bayonet socket is h, and the distance at eccentric pin shaft center and dwang center is r, and the distance between the bearing pin on eccentric pin shaft and the lock ear is L, and then h, r and L satisfy inequality $L+r-\sqrt{L^2-{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="Y20032010731700121.png,Y20032010731700131.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}\&GreaterEqual;h,$ And the internal diameter of table leg is more than or equal to the degree of depth of notch.

Described desktop bottom surface is installed with a fixed head near place, table angle, and described lock ear is fixed in the fixed head below.

Be provided with the shape reinforcement suitable in the ducted body of described table leg upper end with it, this reinforcement is provided with and the corresponding through hole in described pivot hole, the reinforcement side arm is provided with and corresponding first breach of the notch of table leg end, another relative with first breach on reinforcement sidewall is provided with second breach, and the degree of depth of first breach and second breach is greater than the height of lock ear.

Described swing component is made up of two plates, and described lock ear clip is located between two plates.

The length direction of described turning handle is vertical with dwang, and vertical with the line at eccentric pin shaft center with the dwang center.

But relevant position, desktop bottom surface is provided with the clamping device of clamping turning handle.

By above-mentioned description to the utility model structure as can be known, compare with original folding table, the utlity model has following advantage: first, the utility model the fixing of table leg when user mode and folded state all finished by the cooperation of table leg and lock ear, saved original folding supporting bar structure and desktop bottom surface clamping device to table leg, thereby simple in structure, save cost; The second, the hinge arrangement that the utility model adopted is less, and its stability also so greatly improves; The 3rd, the utility model only need be pulled turning handle when folding operation, simple to operate, and its processing safety also improves greatly.

Description of drawings

Fig. 1 is the utility model fold latch external structure schematic diagram regularly;

Fig. 2 be among Fig. 1 B-B to cutaway view;

Fig. 3 is folding but be in the structural representation of released state for the utility model;

Fig. 4 is in user mode for the utility model and is in the structural representation of released state;

The structural representation that Fig. 5 is in user mode and is in the lock state for the utility model;

Fig. 6 be among Fig. 1 A-A to cutaway view;

Fig. 7 is a C place partial enlarged drawing among Fig. 1;

Fig. 8 is the utility model turning handle structural representation;

Fig. 9 is the structural representation of the clamping device of the utility model clamping turning handle;

Figure 10 is the utility model lock ear and fixed head syndeton schematic diagram;

Figure 11 is the utility model swing component structural representation;

Figure 12 is the structural representation of the utility model reinforcement;

Figure 13 is the structural representation of the utility model dwang and eccentric pin shaft;

Figure 14 connects the structural representation of the T-connecting piece of dwang and turning handle for the utility model;

Figure 15 is the structural representation of the utility model table leg and " 9 " font connecting rod.

Specific embodiment

A specific embodiment of the present utility model, referring to figs. 1 through Figure 15, comprise rectangular desktop 1, table leg 2, desktop 1 bottom surface is fixed with a fixed head 4 near place, table angle, fixed head 4, with reference to Figure 10, fixed head 4 plugs the rectangle lock ear 3 that is fixed with an extension downwards by the rectangular opening 401 at its middle part, these lock ear 3 root inner side edges are provided with table leg bayonet socket 301, this table leg bayonet socket 301 is a strip, its length direction is parallel with desktop, lock ear 3 middle parts are provided with a bearing pin 8 vertical with locking ear 3, lock ear 3 lower limbs 302 and 303 one-tenth one fillets of outer side edges, table leg 2 upper ends are for being sheathed on the ducted body outside the lock ear 3, the inner sidewall upper portion of this ducted body is provided with one can be in direction eye-splice the notch 21 in table leg bayonet socket 301 in parallel with desktop 1, the distance that the distance of the lower limb of the table leg bayonet socket 301 of lock ear 3 roots and lock ear 3 lower limbs 302 equals to lock 3 liang of vertical edges of ear is the length of lower limb 302, and be equal to or slightly less than the internal diameter of table leg 2 ducted bodies, the center line of the bearing pin 8 on the lock ear 3 and the center line of table leg 2 intersect, and the radius of the fillet between lock ear 3 lower limbs 302 and the outer side edges 302 is equal to or slightly less than table leg 2 ducted body internal diameters.

Table leg 2 is provided with a pivot hole 20 near the upper end, a dwang 5 is pivoted in this pivot hole 20, dwang 5 is parallel with the bearing pin 8 on the lock ear 3, one end of dwang 5 is positioned at table leg 2 end ducted bodies, be provided with an eccentric pin shaft 7 in eccentric position on this end end face, its other end is to another table leg 2, direction is extended, described another table leg 2 ' is on the same minor face of rectangle desktop 1 with table leg 2, other has a swing component 6, its two ends respectively with dwang 5 on eccentric pin shaft 7 and the bearing pin 8 at lock ear 3 middle parts be rotatably connected, with reference to Figure 11, this swing component 6 has identical plates of shape 601 and 602 connecting portions 603 by its bottom to be formed by connecting by two mutual equalitys, lock ear 3 is located between two plates 601 and 602, plates 601 and 602 profile by a bigger circular arc and a less circular arc with and its two tangent straight lines constitute, the radius of bigger circular arc is slightly less than the internal diameter of table leg 2 ducted bodies, the center line of eccentric pin shaft 7 passes the center of circle of less circular arc, and the center line of bearing pin 8 passes the center of circle of bigger circular arc.

With reference to Fig. 2, for table leg 2 is in folded state and is in the lock state, be sticked in the notch 21 of table leg 2 ends because lock the table leg bayonet socket 301 of ear 3 roots this moment, so table leg 2 can't rotate, if the distance at the center of the center of eccentric pin shaft 7 and dwang 5 is r, eccentric pin shaft 7 is L with the centre-to-centre spacing of bearing pin 8, and then the centre-to-centre spacing of bearing pin 8 and dwang 5 is at this moment With reference to Fig. 3, for table leg 2 is in folded state and is in released state, this moment, the center of eccentric pin shaft 7 turned on the line of centres of dwang 5 and bearing pin 8, because L and r are fixed value, this moment, bearing pin 8 was L+r with the centre-to-centre spacing of dwang 5; The relative desktop 1 in the center of bearing pin 8 maintains static, thereby dwang 5 relative desktops are to the desktop medial movement, and establishing this displacement of moving is s, then $s=L+r-\sqrt{L^2-{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="Y20032010731700121.png,Y20032010731700131.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}.$ Because be released state this moment, promptly table leg 2 is in rotatable state, thereby the bottom of the notch on the table leg 2 21 must be in outside the table leg bayonet socket 301, and the degree of depth of establishing table leg bayonet socket 301 is h, then must satisfy s 〉=h, promptly $L+r-\sqrt{L^2-{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="Y20032010731700121.png,Y20032010731700131.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}\&GreaterEqual;h,$ Table leg is just rotatable.

Aforementioned released state lower table leg 2 is turned, and the end face of table leg 2 must be in the inboard of the center line of bearing pin 8 vertical directions, and promptly the internal diameter of table leg 2 must be more than or equal to the degree of depth of notch 21.

With reference to Fig. 4, for table leg 2 is in user mode and is in released state, this moment, table leg 2 was in the state that can fold to the inside; With reference to Fig. 5, for table leg 2 is in user mode and is in the lock state, this moment, the ducted body of table leg 2 ends was sleeved on the lock ear 3 fully, and two madial walls of table leg 2 ducted bodies closely cooperate with the medial and lateral of lock ear 3, therefore can't rotate.

This shows that Fig. 2 to Fig. 5 has represented that table leg 2 is by the course of action of folding lock-out state to the operating process of using lock-out state and dwang 5, eccentric pin shaft 5 and swing component 6.

Foldable structure between aforementioned another table leg 2 ' and the desktop 1, with the foldable structure symmetry of aforementioned table leg 2 with desktop 1, with reference to Fig. 7 and Figure 14, the relative elongated end of its corresponding dwang 5 ' and dwang 5 is fixedlyed connected with the two ends of the cross bar 902 of a "T"-shaped connector 90 respectively, be installed with turning handle 9 on the vertical pole 901 of "T"-shaped connector 90, the part that this vertical pole 901 connects turning handle 9 slightly is bent downwardly.The length direction of turning handle 9 is vertical with dwang 5 and 5 ', and vertical with the line of centres of eccentric pin shaft 7 with dwang 5.But the relevant position of desktop 2 bottom surfaces is provided with the clamping device 12 of the vertical pole 901 that clamping and turning handle 9 fix.With reference to Fig. 9, this clamping device 12 comprises holder 1201 and rubber-like clamping part 1202.With reference to Fig. 8, turning handle 9 is provided with a jack 905 along axis, aforementioned vertical pole 901 is inserted in the jack 905, turning handle 9 is provided with screw 904, can use screw to be combined in the screw 904 and vertical pole 901 is fixed in the jack 905, and turning handle 9 inboards are provided with hand grip portion 903 and support portion 902, hand grip portion 903 adapts with the shape of hand, be convenient to hold, support portion 902 make turning handle 9 when the folding lock-out state of table leg 2 with desktop 1 maintenance certain distance, handled easily.With reference to Figure 15 and Fig. 6, be that the connecting rod 11 of " 9 " font is fixedly connected by a cross section between table leg 2 and the table leg 2 ', the afterbody of its " 9 " font is covered on dwang 5 and 5 ' top, and its middle part is provided with a breach 110, with the rotation of cooperation turning handle 9.

For the end that makes table leg 2 can better supporting desktop 1, be provided with a reinforcement 10 in the table leg 2 end ducted bodies, with reference to Figure 12, its shape and table leg 2 ducted bodies are suitable, this reinforcement 10 be provided with aforementioned table leg 2 on pivot hole 20 corresponding through holes 1003, reinforcement 10 side arms are provided with notch 21 corresponding first breach 1001 with table leg 2 ends, another relative with first breach 1001 on the reinforcement 10 sidewall is provided with second breach 1002, for in two madial walls that use lock-out state lower table leg 2 ducted bodies and lock ear 3, the outside closely cooperates, the degree of depth of first breach 1001 and second breach 1002 must be greater than the height of lock ear 3, its degree of depth and width also must be enough big simultaneously, not hinder the rotation of swing component 6.

Above-mentioned is a preferable specific embodiment of the present utility model; but design concept of the present utility model is not limited thereto; allly utilize design concept of the present utility model and, should belong to protection domain of the present utility model the improvement of the unsubstantiality that the utility model carried out.

Claims (8)

1, a kind of table leg fold mechanism of folding table, comprise rectangular desktop, table leg, it is characterized in that: the desktop bottom surface is installed with the rectangle lock ear of downward extension near place, table angle, this lock basal part of the ear portion inner side edge is provided with the table leg bayonet socket, lock ear middle part be provided with one with the straight bearing pin of lock ear-lobe, lock ear lower limb becomes a fillet with outer side edges, the table leg upper end is for being sheathed on the outer ducted body of lock ear, the inner sidewall upper portion of this ducted body is provided with one can be in direction eye-splice the notch in table leg bayonet socket in parallel with desktop, table leg is provided with a pivot hole near the upper end, a dwang is pivoted in this pivot hole, dwang is parallel with the bearing pin on the lock ear, dwang is positioned on the end face of table leg end ducted body and is provided with an eccentric pin shaft in eccentric position, other has a swing component, its two ends respectively with dwang on eccentric pin shaft and the bearing pin at lock ear middle part be rotatably connected, dwang is connected with a turning handle.

2, the table leg fold mechanism of a kind of folding table as claimed in claim 1, it is characterized in that: the distance that the distance of the lower limb of the table leg bayonet socket of described lock basal part of the ear portion and lock ear lower limb equals to lock ear two vertical edges, and be equal to or slightly less than the internal diameter of table leg ducted body, the center line of the bearing pin on the lock ear and the center line of table leg intersect, and the radius of the fillet between lock ear lower limb and the outer side edges is equal to or slightly less than table leg ducted body internal diameter.

3, the table leg fold mechanism of a kind of folding table as claimed in claim 2, it is characterized in that: the degree of depth of table leg bayonet socket is h, the distance at eccentric pin shaft center and dwang center is r, and the distance between the bearing pin on eccentric pin shaft and the lock ear is L, and then h, r and L satisfy inequality $L+r-\sqrt{L^2-r^2}\&GreaterEqual;h,$ And the internal diameter of table leg is more than or equal to the degree of depth of notch.

4, the table leg fold mechanism of a kind of folding table as claimed in claim 1 is characterized in that: described desktop bottom surface is installed with a fixed head near place, table angle, and described lock ear is fixed in the fixed head below.

5, the table leg fold mechanism of a kind of folding table as claimed in claim 1, it is characterized in that: be provided with the shape reinforcement suitable in the ducted body of described table leg upper end with it, this reinforcement is provided with and the corresponding through hole in described pivot hole, the reinforcement side arm is provided with and corresponding first breach of the notch of table leg end, another relative with first breach on reinforcement sidewall is provided with second breach, and the degree of depth of first breach and second breach is greater than the height of lock ear.

6, the table leg fold mechanism of a kind of folding table as claimed in claim 1 is characterized in that: described swing component is made up of two plates, and described lock ear clip is located between two plates.

7, the table leg fold mechanism of a kind of folding table as claimed in claim 1, it is characterized in that: the length direction of described turning handle is vertical with dwang, and vertical with the line at eccentric pin shaft center with the dwang center.

8, the table leg fold mechanism of a kind of folding table as claimed in claim 1 is characterized in that: but relevant position, desktop bottom surface is provided with the clamping device of clamping turning handle.

Images