TWI830647B - Clamping device - Google Patents

Abstract

The clamping device of the present invention is suitable for installation on an installation hole of a base of an adjustable armrest chair, and includes an installation base, a clamping element, a rotating handle, and a transmission element. The installation base is installed and fixed in the installation hole, and one side of the installation base is also provided with an installation groove. The clamping element is installed in the installation groove. The rotating handle is disposed on the other side of the installation base relative to the installation groove and has a center hole. The transmission element includes an installation shaft and a pressing piece. One end of the installation shaft is installed in the center hole, and the pressing piece is installed at the other end of the installation shaft and located in the installation groove. The pressing piece is provided with a first serration near one side of the installation groove, and the pressing piece presses the clamping element. A second serration is provided at the bottom of the installation groove and is coupled to the first serration. When the rotating handle is rotated in one direction, the installation shaft drives the first serration and causes relative movement between the first serration and the second serration, thereby driving the clamping element to move by the pressing piece. The clamping device of the present invention is easy for the user to assemble the armrest on both sides of the chair cushion.

Description

pressing device

The present invention is a pressing device, particularly a pressing device installed on an armrest seat.

Nowadays, the requirements of the working environment and living environment are increasing day by day, and people have higher and higher requirements for office chairs. In addition to the flexibility, comfort and beauty of the chair, the chair also needs to have adjustable functions to adapt to different user heights, body shapes and usage methods. Adjustable armrest office chairs are designed to meet these needs. However, the shortcomings of this design method are also obvious. First of all, assembly is difficult, and it is difficult for users without certain skills to complete it by themselves. Secondly, this design requires more parts, which not only increases the difficulty of assembly, but also increases the cost of production. Finally, because it is difficult to assemble, it is not suitable for the furniture DIY market. Therefore, how to solve these problems so that the adjustable armrest office chair has the advantages of high efficiency, low cost, easy assembly, etc. is a question worthy of consideration by those with ordinary knowledge in this field.

The object of the present invention is to provide a clamping device installed on an adjustable armrest seat, which helps the user quickly and conveniently assemble the armrest on the adjustable armrest seat. The clamping device of the present invention is suitable for being installed on a mounting hole of a base of an adjustable armrest seat. The clamping device includes a mounting base, a clamping element, a rotating handle and a transmission element. Wherein, the mounting base is installed and fixed in the mounting hole, and a mounting groove is also provided on one side of the mounting base. The tightening element is installed in the mounting groove. In addition, the rotating handle is arranged on the other side of the mounting base relative to the mounting groove, and the rotating handle has a central hole. In addition, the transmission element includes a mounting shaft and a pressing member. One end of the mounting shaft is installed in the central hole, and the pressing member is installed on the other end of the mounting shaft and is located in the mounting groove. A first ratchet member is provided on a side of the pressing member close to the installation groove, and the pressing member presses against the pressing element. Wherein, a second ratchet component is provided at the bottom end of the installation groove, and the second ratchet component is coupled with the first ratchet component. When the rotary handle rotates in one direction, the installation shaft will drive the first ratchet member and cause the first ratchet member and the second ratchet member to move relative to each other, so that the pressing member drives the The pressing element moves up and down. In the above-mentioned pressing device, the pressing member further includes two first limiting members. The two first limiting members are respectively located on both sides of the first ratchet member and are parallel and symmetrical; The installation groove further includes two second limiting members, and the two second limiting members are respectively located on both sides of the second ratchet member and are parallel and symmetrical. In the above-mentioned tightening device, the installation base is further provided with an anti-pull-out piece, and the anti-pull-out piece and the installation slot are arranged on the same side of the installation base. In the above-mentioned pressing device, the mounting base is further provided with a clamping slot, and the clamping slot and the mounting slot are arranged on the same side of the mounting base. The invention has the following advantages: it allows users to assemble the armrests on both sides of the chair cushion conveniently and quickly and fix the position of the armrests. In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

Please refer to FIGS. 1A to 1C . FIG. 1A shows a schematic diagram of the chair base 10 of this embodiment. FIG. 1B shows a schematic diagram of the chair base 10 combined with the two armrests 8 . FIG. 1C shows the mounting holes 122 . Schematic diagram. The seat 10 of this embodiment includes a base 12 and two pressing devices 13 . The base 12 includes two armrest slots 121, two mounting holes 122, two embedding holes 123, and two support beams 124. Each mounting hole 122 is connected to one of the armrest slots 121, and each The mounting holes 122 are respectively adjacent to one embedding hole 123. Each mounting hole 122 is separated from the adjacent embedding hole 123 by a support beam 124 . Please refer to FIG. 1B and FIG. 2 . FIG. 2 shows a schematic diagram of the handrail 8 . The chair base 10 is suitable for combining two armrests 8, and each armrest 8 includes a crossbar 81, and a slide groove 81G is provided on the crossbar 81. Specifically, one end of the crossbar 81 of the handrail 8 is inserted into the handrail slot 121 of the base 12. The lateral length of the chute 81G is the movable range of the handrail 8, and the crossbar 81 needs to be moved through the pressing device 13. Fix the position of the armrest 8. As for how to fix the position of the armrest 8, the following paragraph will give an example. Please refer to FIGS. 3A to 3D . FIG. 3A and FIG. 3B show a schematic diagram of the tightening device 13 . FIG. 3C shows a schematic diagram of the mounting slot 131G. FIG. 3D shows the tightening element 132 facing the crossbar 81 . schematic diagram. Two tightening devices 13 are respectively installed in the two mounting holes 122. Each tightening device 13 includes a mounting base 131, a tightening component 132, an operating component 133 and a transmission component 134 (please refer to the figure. 5). Among them, the mounting base 131 is installed and fixed in the mounting hole 122, and one side of the mounting base 131 is provided with a mounting groove 131G and an anti-pull-out piece 131P. The anti-pull-out piece 131P is adapted to interfere with an edge 81E of the slide groove 81G of the crossbar 81 . In this way, the crossbar 81 can be prevented from being pulled out or falling from the armrest slot 121 . In this embodiment, the installation base 131 is provided with an anti-pull-out component 131P, and the crossbar 81 is provided with a slide groove 81G. However, in other embodiments, the positions of the anti-pull-out part 131P and the sliding groove 81G can also be exchanged with each other. Specifically, please refer to Figure 3E and Figure 3F. The crossbar 81' of the handrail 8' is provided with an anti-pull-out piece 81P, and the installation base 231 is also provided with a card slot 231G. The card slot 231G and the installation slot 131G are both provided. On the same side as mounting base 231. Among them, the anti-pull-out part 81P of the cross bar 81' interferes with an edge of the card slot 231G. In this way, the crossbar 81' of the armrest 8' can also be prevented from being pulled out or falling from the armrest slot 121. In addition, the operating element 133 is disposed on the other side of the mounting base 131 relative to the mounting groove 131G. That is to say, the operating element 133 is exposed outside the base 12, so that it is convenient for consumers to operate. The operating element 133 is, for example, a rotary handle, and the rotary handle has a central hole 133C. In addition, the pressing element 132 is installed in the installation groove 131G and faces the cross bar 81 . In this embodiment, the operating element 133 is a rotary handle. However, in other embodiments, the operating element 133 can also be a knob. This allows for finer adjustments and control, making it easier to operate accurately. Please refer to Figures 4A to 4D. Figure 4A shows a schematic diagram of the pressing member 1342 in the installation groove 131G. Figure 4B shows a schematic diagram of the positional relationship between the pressing element 132, the operating element 133 and the transmission element 134. FIG. 4C shows a schematic diagram of the transmission element 134 connected to the operating element 133 , and FIG. 4D shows a schematic diagram of the transmission element 134 . In this embodiment, the transmission element 134 is connected between the pressing element 132 and the operating element 133. The transmission element 134 includes a mounting shaft 1341 and a pressing member 1342. One end of the mounting shaft 1341 is installed in the central hole. 133C, and the pressing member 1342 is installed on the other end of the installation shaft 1341 and located in the installation groove 131G. Among them, the upper and lower sides of the installation shaft 1341 are arc surfaces, and the left and right sides are flat surfaces in a fool-proof structural design (please refer to Figure 4D). This structure is conducive to avoiding errors caused by human operating factors to improve the reliability of the product. performance, stability and security. In addition, the pressing member 1342 presses against the pressing element 132, and the pressing member 1342 includes a first ratchet member 1342R and two first limiting members 1342L. Among them, the first ratchet member 1342R is on one side close to the installation groove 131G, and the two first limiting members 1342L are respectively located on both sides of the first ratchet member 1342R, and are parallel and symmetrical to each other. In addition, please refer to FIG. 3C again. The installation groove 131G includes a second ratchet member 131R, a through hole 131H and two second limiting members 1312. Among them, the second ratchet member 131R is provided at the bottom end of the mounting groove 131G, the through hole 131H is located at the center of the second ratchet member 131R, and the hole center of the through hole 131H is on the same axis as the center hole 133C. on the line, and the mounting shaft 1341 passes through the through hole 131H. In other words, the second ratchet member 131R is between the pressing member 1342 and the operating element 133 . Moreover, the second ratchet member 131R and the first ratchet member 1342R are coupled. Specifically, when the rotating handle is in an open state, the highest point of the first ratchet component 1342R touches the lowest point of the second ratchet component 131R, and the highest point of the second ratchet component 131R also touches the second ratchet component 131R. When it hits the lowest part of the first ratchet member 1342R, the two ratchet members are coupled to each other. In this state, the position of the handrail 8 can be adjusted within a certain range, and this range is the lateral length of the chute 81G. In addition, the two second limiting members 1312 of the mounting groove 131G are also located on both sides of the second ratchet member 131R, and are parallel and symmetrical to each other. Moreover, when the second ratchet member 131R is coupled to the first ratchet member 1342R, the two first limiting members 1342L and the two second limiting members 1312 are arranged in a staggered manner. Therefore, through the first limiting member 1342L and the second limiting member 1312, the rotation range of the rotating handle (operating element 133) can be limited. In this embodiment, the operating element 133 is adapted to drive the transmission element 134 , and the transmission element 134 drives the pressing element 132 to move toward the crossbar 81 and to press the crossbar 81 . Specifically, when the rotating handle is rotated in one direction (closed state), the installation shaft 1341 will drive the first ratchet member 1342R and the second ratchet member 131R to move relative to each other. The highest point of the first ratchet member 1342R The highest point of the second ratchet member 131R is touched, so that the pressing member 1342 drives the pressing member 132 to move toward the cross bar 81 . In this way, the pressing element 132 will fix the cross bar 81, so that a friction force with a certain intensity is formed between the surface of the pressing element 132 and the surface of the cross bar 81, so that the cross bar 81 cannot be easily moved by external force. On the contrary, when the rotary handle rotates to the original position, the surface of the pressing element 132 will be separated from the surface of the cross bar 81, so that the user can adjust the cross bar 81 of the handrail 8 within a certain range. Please refer to FIGS. 5A and 5B . FIGS. 5A and 5B show schematic views of the pressing device 13 and the stop plate 14 from different angles. FIG. 5C shows a schematic view of the stop plate 14 . FIG. 5D shows the view of the stop plate 14 in FIG. 1A . Magnified view of portion marked X. The seat 10 also includes two stopper plates 14, each stopper plate 14 is installed in an embedding hole 123 respectively. In this embodiment, the anti-pull-out structure 141 is provided on the anti-pull-out plate 14 , and the anti-pull-out structure 141 is engaged with the support beam 124 of the base 12 . Therefore, when the anti-pull plate 14 is inserted into the embedding hole 123 , the anti-pull-out structure 141 can prevent the anti-pull plate 14 from falling off from the embedding hole 123 . In addition, when an external force presses the anti-pull-out structure 141 , the anti-pull-out structure 141 can avoid the support beam 124 and is not locked on the support beam 124 , thereby moving the anti-pull plate 14 out of the embedding hole 123 . In addition, a first engaging edge 131F and a second engaging edge 131S are respectively provided on two opposite sides of the mounting base 131 . Among them, through the first engaging edge 131F and the second engaging edge 131S, the installation base 131 can be supported on the base 12 , and the first engaging edge 131F will abut against the stop plate 14 . Specifically, the width W1 of the first engaging edge 131F (see FIG. 3A ) is greater than the width W2 of the support beam 124 (see FIG. 5D ), and the width of the second engaging edge 131S that interferes with the base 12 is less than The width W3 of the stop plate 14 (please refer to FIG. 5A ), in this embodiment, the width of the interference between the second engaging edge 131S and the base 12 is the overall width W4 of the second engaging edge 131S (please refer to FIG. 5A ). Therefore, before the stop plate 14 is inserted into the embedding hole 123 , the mounting base 131 can be installed in the mounting hole 122 , and the first engaging edge 131F is supported on the lower surface of the support beam 124 . After that, the stopper plate 14 is inserted into the embedding hole 123 , and the side surface of the first engaging edge 131F will abut against the stopper plate 14 . In addition, if you want to detach the crossbar 81 of the armrest 8 from the base 12 , you need to first move the stopper plate 14 out of the embedding hole 123 . After that, the mounting base 131 of the clamping device 13 moves toward the embedding hole 123 , and the clamping device 13 can be separated from the base 12 . Then, since the slide groove 81G of the cross bar 81 will not be blocked by the anti-pull-out part 131P of the pressing device 13, the cross bar 81 of the armrest 8 can be pulled out from the armrest slot 121. Therefore, the chair base 10 of this embodiment can easily assemble and disassemble the armrests 8 on both sides. In this way, it is helpful to reduce the size of the outer packaging box of the chair seat 10 and greatly reduce the cost of transporting the product. To sum up, compared with the traditional adjustable armrest office chair, the chair base 10 of this embodiment does not need to use other parts (such as screws) to lock the installation base when assembling the armrest 8 and the clamping device 13 131, it is convenient for users to assemble the handrails 8 on both sides by themselves, and it also reduces the production cost. Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone with ordinary skill in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. , therefore, the protection scope of the present invention shall be subject to the scope of the appended patent application.

8, 8’: handrail 81, 81’: Crossbar 81G:Chute 81E: Edge of chute 81P: Anti-pull-out parts 10: Chair seat 12: Base 121: Armrest slot 122:Installation hole 123: Embedding hole 124:Support beam 13: Urgent device 131, 231: Installation base 1312: Second limiter 131R: Second ratchet piece 131F: First engaging edge 131S: Second engaging edge 131P: Anti-pull-out parts 131G: Installation slot 131H:Through hole 132: pressing element 133: Operating components 133C: Center hole 134: Transmission components 1341: Install shaft 1342: Pressure parts 1342R: First ratchet piece 1342L: First limiting piece 14:Stop slide 141: Anti-pull-out structure 231G: card slot X: local range of the base W1: Width of the first engaging edge W2: Width of support beam W3: Width of stop plate W4: Overall width of the second snap edge

FIG. 1A is a schematic diagram of the seat 10 of this embodiment. FIG. 1B shows a schematic diagram of the seat 10 combined with the two armrests 8 . FIG. 1C shows a schematic diagram of the mounting hole 122 . Figure 2 shows a schematic diagram of the handrail 8. FIG. 3A and FIG. 3B are schematic diagrams of the pressing device 13 . FIG. 3C shows a schematic diagram of the mounting groove 131G. FIG. 3D shows a schematic diagram of the pressing element 132 facing the crossbar 81 . Figure 3E shows a schematic diagram 2 of the handrail 8'. Figure 3F shows a schematic diagram of the mounting base 231. FIG. 4A shows a schematic diagram of the pressing member 1342 in the installation slot 131G. FIG. 4B shows a schematic diagram of the positional relationship between the pressing element 132 , the operating element 133 and the transmission element 134 . FIG. 4C shows a schematic diagram of the transmission element 134 connected to the operating element 133 . FIG. 4D shows a schematic diagram of the transmission element 134 . 5A and 5B are schematic views of the pressing device 13 and the stopper plate 14 from different angles. FIG. 5C shows a schematic diagram of the sliding plate 14 . FIG. 5D shows an enlarged view of the portion marked X in FIG. 1A .

10: Chair seat

12: Base

121: Armrest slot

124:Support beam

13: Urgent device

133: Operating components

X: local range of the base

Claims (4)

A clamping device is suitable for being installed on a mounting hole of a base of an adjustable armrest seat. The clamping device includes: A mounting base is installed and fixed in the mounting hole, and a mounting slot is also provided on one side of the mounting base; A tightening component is installed in the installation slot; A rotating handle is provided on the other side of the mounting base relative to the mounting slot, and the rotating handle has a central hole; and A transmission element includes a mounting shaft and a pressing member. One end of the mounting shaft is installed in the central hole, and the pressing member is installed on the other end of the mounting shaft and is located in the mounting groove. A first ratchet piece is provided on one side of the piece close to the installation slot, and the pressing piece presses against the pressing element; Wherein, a second ratchet piece is provided at the bottom end of the installation groove, and the second ratchet piece is coupled with the first ratchet piece; When the rotary handle rotates in one direction, the installation shaft will drive the first ratchet member and cause the first ratchet member and the second ratchet member to move relative to each other, so that the pressing member drives the The pressing element moves up and down. The pressing device according to claim 1, wherein the pressing member further includes two first limiting members, the two first limiting members are respectively located on both sides of the first ratchet member and are parallel to each other. Symmetrical shape; wherein the installation groove also includes two second limiting pieces, the two second limiting pieces are respectively located on both sides of the second ratchet piece, and are parallel and symmetrical. The pressing device of claim 1, wherein the installation base is further provided with an anti-pull-out piece, and the anti-pull-out piece and the installation slot are disposed on the same side of the installation base. The pressing device according to claim 1, wherein the mounting base is further provided with a clamping slot, and the clamping slot and the mounting slot are disposed on the same side of the mounting base.

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