BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a multi-function worktable that may easily overturn the top plate for changing the use mode by way of an overturning mechanism.
2. Description of the Prior Arts
As illustrated in FIG. 1, a prior art multi-function worktable 10 comprises a table plate 11 including two side surfaces for use in different modes. The table plate 11 includes a top surface in the form of a plane provided thereon and having receiving compartments 111 mounted thereon for placing tools or parts in a workbench mode, and includes a net-shaped pedal arranged on the bottom surface thereof for the user's stepping thereon in a scaffold mode. The table plate 11 further includes coupling portions 12 attached on two sides thereof and having positioning devices 121 fixed therein respectively. The coupling portions 12 includes leg supports 13 axially secured on the two ends thereof individually for using the positioning devices 121 of the coupling portions 12 to control the rotations and positions of the leg supports 13. In addition, the leg supports 13 are connected to the table plate 11 by way of the connecting rod assemblies 14, so that the leg supports 13 may stably support the table plate 11. Referring to FIGS. 2 and 3, as changing the worktable 10 from a workbench mode to a scaffold mode, the connecting rod assemblies 14 are disengaged from one ends of the leg supports 13 individually, and the positioning devices 121 of the connecting rod assemblies 14 are released so as to rotate the leg supports 13 toward another sides. After they are pivotally rotated to proper angles, the positioning devices 121 of the coupling portions 12 are changed for fixing the leg supports 13, and then the connecting rod assemblies 14 are coupled to the leg supports 13 individually, thereby overturning the worktable 10 for use in a scaffold mode.
Nevertheless, such a prior art worktable 10 still has the following disadvantages:
1. Because during the changing operation of the use mode, the connecting rod assemblies 14 have to be disengaged from one ends of the leg supports 13, and then the leg supports 13 are axially rotated to proper angles and positioned individually. Thereafter, the connecting rod assemblies 14 are joined to the leg supports 13 again, causing a tedious changing operation.
2. Furthermore, as axially rotating the leg supports 13 and overturning the worktable 10, the user has to finish the mode-changing operation by himself, resulting in a difficult and labor consuming operation.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide a multi-function worktable that may easily overturn the top plate for changing the use mode.
Another object of the present invention is to provide a multi-function worktable that may overturn the top plate with saving labor by using an overturning mechanism.
In accordance with one aspect of the present invention, there is provided a multi-function worktable comprising a bottom plate including two cylindrical members disposed at two sides thereof and having through grooves formed therein, and four leg assemblies affixed to the front and rear ends of the two cylindrical members individually for extension and extraction, an overturning mechanism being fixed between the two cylindrical members for using the top plate in different modes, wherein the overturning mechanism includes two opposite guide slots formed in the two cylindrical members, and the top plate includes two rollers mounted on two sides thereof where correspond to one ends of the guide slots respectively, such that as moving the top plate upward, the two rollers may rollingly move frontward and backward along the two guide slots so as to change the top plate in different use modes.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective diagram illustrating the assembly of a prior art multi-function worktable;
FIG. 2 is a perspective diagram illustrating the changing operation of the use mode of the prior art multi-function worktable;
FIG. 3 is a perspective diagram illustrating the prior art multi-function worktable being in a scaffold mode;
FIG. 4 is a perspective diagram illustrating the exploded components of a multi-function worktable according to the present invention;
FIG. 5 is a perspective diagram illustrating the assembly of the multi-function worktable according to the present invention;
FIG. 6 is a cross sectional diagram illustrating the assembly of the multi-function worktable according to the present invention;
FIG. 7 is a perspective diagram illustrating the changing operation of the use mode of the multi-function worktable according to the present invention;
FIG. 8 is a partial cross sectional diagram according to FIG. 7;
FIG. 9 is another perspective diagram illustrating the changing operation of the use mode of the multi-function worktable according to the present invention;
FIG. 10 is also another perspective diagram illustrating the changing operation of the use mode of the multi-function worktable according to the present invention;
FIG. 11 is a perspective diagram illustrating the multi-function worktable of the present invention being in a scaffold mode;
FIG. 12 is a perspective diagram illustrating the leg assemblies of the multi-function worktable of the present invention being extended.
FIG. 13 is a perspective diagram illustrating the multi-function worktable of the present invention being in a storage mode.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 4-6, a multi-function worktable in accordance with the present invention comprises a bottom plate 20, two cylindrical members 21, 22, four leg assemblies 23, 24, 25, 26, and a top plate 27, the bottom plate 20 including a plurality of elongated stems 201 for supporting the top plate 27 thereon, at the front and rear sides of which are provided with shoulders 202 respectively, at the lower side of which is disposed a drawer 203 for placing objects therein. The two cylindrical members 21 and 22 are mounted onto the right and left sides of the bottom plate 20, and include through grooves 211, 221 formed therethrough, and include screw holes for communication with the through grooves 211, 221 arranged on the front and rear end portions thereof for screwing with bolts 212, 222 individually. Four legs 231, 241, 251, 261 of four leg assemblies 23, 24, 25, 26 are affixed to the front and rear ends of the two cylindrical members 21 and 22 individually, and include coupling portions 232, 242, 252, 262 extendedly secured on one ends thereof for being inserted into the through grooves 211 and 221 respectively and having annular indentions 233, 243, 253, 263 for corresponding to and confining the bolts 212, 222 formed thereon so that the legs 231, 241, 251, 261 may be affixed to the front and rear ends of the two cylindrical members 21, 22, and may be rotatable for extension and storage. The legs 231, 241, 251, 261 further include extensions 234, 244, 254, 264 disposed therein for adjusting their lengths individually, hence the height of the leg assemblies 23, 24, 25, 26 may be adjustable. Furthermore, between the four leg assemblies 23, 24, 25, 26 and the bottom plate 20 are defined with retractable connecting rod assemblies 235, 245, 255, 265, one ends of which couple with the legs 231, 241, 251, 261, and another ends of which connect with the shoulders 202 of the bottom plate 20 such that the leg assemblies 23, 24, 25, 26 allow to securely support the bottom plate 20 and to be retractably stored. Besides, the left leg assemblies 23, 24 and the right leg assemblies 25, 26 couple with the brackets 236, 256 individually so that the leg assemblies 23, 24, 25, 26 may supplementally support the bottom plate 20. A top plate 27 is mounted between the two cylindrical members 21 and 22, and includes grips 271 arranged on the front and rear sides thereof respectively, and includes a plane formed on the top surface thereof and having receiving compartments 272 provided thereon for placing tools or parts in a workbench mode. On the other hand, the bottom surface of the top plate 27 is constructed in the form of antislip patterns so that the user may step thereon safely while in a scaffold mode. Additionally, between the top plate 27 and the two cylindrical members 21, 22 is defined with an overturning mechanism including two opposite guide slots 213, 223 formed in the two cylindrical members 21, 22, and the top plate 27 includes two rollers 274, 275 mounted on two sides thereof where correspond to one ends of the guide slots 213, 223 respectively such that as the grip 271 is held to push the top plate 27 upwardly, the two rollers 274, 275 move forwardly and backwardly, and between the top plate 27 and the two cylindrical members 21, 22 is provided with a positioning mechanism including engaging pieces 276, 277, 278, 279 for engaging or disengaging the top plate 27, and the two cylindrical members 21, 22 include fixing recesses 224, 225 secured on predetermined positions thereof where correspond to the engaging pieces 276, 277, and the cylindrical members 21, 22 include another fixing recesses 215, 225 fixed on the predetermined positions thereof where correspond to the engaging pieces 278, 279 after overturning the top plate 27, and as the engaging pieces 276, 277 extend to engage with the fixing recesses 214, 224 or as the engaging pieces 278, 279 extend to engage with the fixing recesses 215, 225, the top plate 27 is positioned for preventing its shocking, and while controlling the engaging pieces 276, 277, 278, 279 to retract inward, the positioned top plate 27 is released for being overturned.
With reference to FIGS. 7 and 8, by using the overturning mechanism between the two cylindrical members 21, 22 and the top plate 27, the top plate 27 permits to be overturned directly for changing use mode. For example, as changing a workbench mode to a scaffold mode, the top plate 27 is disengaged from the positioning mechanism of the two cylindrical members 21, 22, and then pushed upward by holding the grip 271 so as to axially rotate the top plate 27 upward by using the two rollers 274, 275 as its fulcrum. As illustrated in FIG. 9, after the top plate 27 is rotated upward, it may be pushed toward another side along the guide slots 213, 223 by way of the rollers 274, 275. Further referring to FIG. 10, as the rollers 274, 275 of the top plate 27 displaces to another side, the top plate 27 may be further moved downward by using the rollers 274, 275 as its rotating fulcrum. As shown in FIG. 11, as the top plate 27 is pushed to the lateral position, its bottom surface with the antislip patterns faces upward, and then the positioning mechanism is utilized to secure the top plate 27, thus finishing the change of the use mode.
With reference to FIG. 12, the extensions 234, 244, 254, and 264 of the legs 231, 241, 251, and 261 may be adjustable to raise the top plate 27, thereby providing the user to work at a higher position.
As illustrated in FIG. 13, as desiring to store the worktable, the leg assemblies 23, 24, 25, 26 have to be retracted to the lateral positions of the sides of the top plate 27, thus finishing the storage.
The invention is not limited to the above embodiment but various modifications thereof may be made. It will be understood by those skilled in the art that various changes in form and detail may made without departing from the scope and spirit of the present invention.
Patent Application
20090078165
