Patent ID: 12203538

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

For better understanding of the structure of the present invention, and also the efficacy that can be achieved thereby, a description will be provided below with reference to the attached drawings:

Referring firstly toFIG.4, the present invention provides a chair adjusting device3, which at least comprises a first control pull-bar5controllable by a first control bar4and a second control pull-bar7controllable by a second control bar6. The chair adjusting device3controls an elevation/depression angle of a chair by means of the first control pull-bar5and the second control pull-bar7.

As shown inFIGS.4,5, and6, the first control pull-bar5and the second control pull-bar7have structures that are the same, and it is noted here that in the following, a description is provided by taking the structure of the first control pull-bar5as an example for illustration. The first control pull-bar5comprises an elongate plate assembly51and a short plate assembly52. The elongate plate assembly51is formed by stacking a plurality of metallic elongate plates511of an elongate elliptic shape, and each of the elongate plates511is formed by means of stamping. Each of the elongate plates511comprises a movement hole512in the form of an elongate slot, a pivot hole513of a circular shape at an end opposite to the movement hole512, and connecting protrusions514at two sides of the pivot hole513for connecting purposes. Formed on a back side of the connecting protrusions514are connecting dimples515. The elongate plate assembly51further comprises separator plates516for separating purposes, and in the present invention, the separator plates516are implemented as a circular shaped body. The separator plates516are each formed, in a center thereof, with a through hole5161, and the through holes5161correspond to the pivot holes513. The separator plates516are provided, on two sides of the through hole5161, with combination projections5162for combining purposes. The combination projections5162correspond to and match with the connecting dimples515. Formed on a back side of the combination projections5162are combination notches5163. The combination notches5163correspond to and match with the connecting protrusions514. As such, the connecting protrusions514are receivable into the combination notches5163respectively. The separator plate516is further provided with at least one rib5164to prevent warpage. The rib5164is implemented in the form of multiple circular raised ribs.

As shown inFIGS.4,5, and6, every two of the elongate plates511of the elongate plate assembly51are provided, at the end thereof where the pivot hole513is located, with one of the separator plates516arranged therebetween. By means of pressing, the two elongate plates511and the separator plate516are press-fit together as a one-piece structure, meaning the connecting protrusions514of the elongate plates511are pressed to fit into the combination notches5163of the separator plate516in a tight fitting manner, and the combination projections5162of the separator plate516are pressed into the connecting dimples515of another one of the elongate plates511in a tight fitting manner, so that a gap corresponding to a thickness of the separator plate516is formed between two elongate plates511at the side corresponding to the movement hole512; and similarly, one of the separator plates516is arranged on the second elongate plate511at the side corresponding to the pivot hole513, and one of the elongate plates511is then arranged on the separator plate516, and then pressing is applied to have the connecting protrusions514of the second elongate plate511fit into the combination notches5163of another one of the separator plates516in a tight fitting manner, and simultaneously, the combination projections5162of the separator plate516are pressed to fit into the connecting dimples515of another one of the elongate plates511in a tight fitting manner. In this way, a thickness of the elongate plate assembly51can be preset through pressing, and thus, the elongate plate assembly51is set up to form tight-fitting connection at one end (the end where the pivot hole513is arranged) through pressing, and at another end (the end where the movement hole512is arranged), each of the elongate plates511and an adjacent one of the elongate plates511are held to have a spacing distance therebetween, and a width of the spacing distance is generally corresponding to the thickness of the separator plates516, and as such, the elongate plate assembly51is made as a pre-assembled sub-assembly.

As shown inFIGS.4,5, and6, the short plate assembly52is formed by stacking a plurality of metallic short plates521, and in the present invention, as a first embodiment, plates of a circular shape is taken as an example for the short plates521for illustration. Each of the short plates521of the circular shape is formed with a pivoting aperture522that is of a circular shape, and one side of the short plate521is formed with engaging projections523, and in the present invention, engaging projections523being arranged pairwise as a left one and a right one is taken as an example for illustration. Formed on a back side of the engaging projections523are engaging troughs524. Every two of the short plates521are provided a partition plate525therebetween, and the partition plate525is formed with fitting bulges5251that correspond to the engaging troughs524of the short plates521, and formed on a back side of the fitting bulges5251are fitting recesses5252. The engaging projections523are receivable into the fitting recesses5252, and the fitting bulges5251are receivable into the engaging troughs524, so that said every two of the short plates521are coupled by means of one partition plate525therebetween, and every two of the short plates521are formed therebetween with a spacing distance at one side that is opposite to the partition plate525. The partition plate525is further provided with at least one rib5253to prevent warpage. The rib5253is implemented in the form of multiple circular raised ribs.

As shown inFIGS.4,5, and6, every two of the short plates521of the short plate assembly52includes one partition plate525arranged therebetween at one side. By means of pressing, the two short plates521and the partition plate525are press-fit together as a one-piece structure, meaning the engaging projections523of the short plates521are pressed to fit into the fitting recesses5252of the partition plate525in a tight fitting manner, and the fitting bulges5251of the partition plate525are pressed into the engaging troughs524of another one of the short plates521in a tight fitting manner, so that a spacing distance corresponding to a thickness of the partition plate525is formed between two short plates521at the side that is opposite to the partition plate525; and similarly, one partition plate525is arranged on one side of the second short plate521, and then pressing is applied to have the engaging projections523of the second short plate521fit into the fitting recesses5252of the partition plate525, and simultaneously, the fitting bulges5251of the partition plate525are pressed to fit into the engaging troughs524of another one of the short plates521. In this way, a thickness of the short plate assembly52can be preset through pressing, and thus, the short plate assembly52is set up to form tight-fitting connection at one end through pressing, and at another end, each of the short plates521and an adjacent one of the short plates521are held to have a spacing distance therebetween, and a width of the spacing distance is generally corresponding to the thickness of the partition plates525, and as such, the short plate assembly52is made as a pre-assembled sub-assembly.

As shown inFIGS.4,6, and7, in the present invention, the ways of assembling the first control pull-bar5and the second control pull-bar7of the chair adjusting device3are the same, and in the following, a description is provided by taking the way of assembling the first control pull-bar5as an example for illustration. Since the elongate plate assembly51and the short plate assembly52of the first control pull-bar5are each made as a one-piece sub-assembly by means of pressing in the way described above, the elongate plate assembly51is fit, in a manner of being rotatable, over a pivot axle311of a pivoting seat31of the chair adjusting device3by means of the pivot holes513. The movement holes512of the elongate plate assembly51are arranged to insert into the short plate assembly52in a manner of being mutually interleaved with each other, and more specifically, each of the short plates521and another one of the short plates521adjacent thereto include a spacing distance therebetween, and each of the elongate plates511and another one of the elongate plates511adjacent thereto also include a spacing distance therebetween, so that one elongate plate511can be inserted between the short plate521and said another one short plate521adjacent thereto; or oppositely speaking, one short plate521can be inserted between each of the elongate plates511and another one of the elongate plates511adjacent thereto; and the movement holes512of the elongate plate assembly51are set to align with the pivoting apertures522of the short plate assembly52, so that the movement holes512and the pivoting apertures522can be used to have the elongate plate assembly51and the short plate assembly52jointly fit, in a rotatable manner, onto a pivot axle41of the first control bar4, and finally, washers W are fit to and set at two outer sides of the first control pull-bar5. As such, an operator for assembling can assemble the first control pull-bar5in an efficient and accurate manner to thereby greatly reduce the assembling cost of the first control pull-bar5. In this way, through operating the first control bar4, the first control pull-bar5is caused to operate to thereby allow the chair adjusting device3to control and adjust the elevation/depression angle of the chair.

As shown inFIGS.8and9, to implement the present invention, the short plate assembly52can be further designed to have an arch shape, meaning each single piece of the short plates521is made in an arch shape, while each of the partition plates525is designed in an elongate rectangular shape, so that with each single piece of the short plates521being of an arch shape and each of the partition plates525being designed in an elongate rectangular shape, pressing and forming of the short plates521and the partition plates525are made easy, and also, an effect of making the short plate assembly52as a sub-assembly for assembling can be achieved.

The efficacy of the present invention is that a chair adjusting device3at least comprises a first control pull-bar5, the first control pull-bar5comprising an elongate plate assembly51and a short plate assembly52; the elongate plate assembly51is formed of a plurality of elongate plates511, the elongate plates511being formed with a movement hole512, and a pivot hole513formed at one side opposite to the movement hole512, connecting protrusions514being formed at one side of the pivot hole513, a back side of the connecting protrusions514being formed with connecting dimples515; every two pieces of the elongate plates511interpose therebetween separator plates516, the separator plates516comprising through holes5161corresponding to the pivot holes513of the elongate plates511, the separator plates516comprising combination projections5162, combination notches5163being on a back side of the combination projections5162, the combination projections5162being receivable into the connecting dimples515, the connecting protrusions514being receivable into the combination notches5163; the short plate assembly52is formed of a plurality of short plates521, the short plates521being formed with a pivoting aperture522, the short plates521being provided, on one side thereof, with engaging projections523, engaging troughs524being on a back side of the engaging projections523; every two pieces of the short plates521interpose partition plates525therebetween, the partition plates525comprising fitting bulges5251corresponding to the engaging troughs524, fitting recesses5252being on a back side of the fitting bulges5251, the fitting bulges5251being receivable into the engaging troughs524, the engaging projections523being receivable into the fitting recesses5252; and as such, it is made easy that the elongate plate assembly51and the short plate assembly52can be assembled in advance as sub-assemblies to ease operation of assembling of the first control pull-bar5.