TWI830648B - Chair seat - Google Patents

Abstract

A chair seat is provided. The chair seat is used for attaching two armrests. The armrest includes a crossbar. The chair seat comprises a base and two clamping devices. The base includes at least one armrest slot and two mounting holes. The armrest slot is suitable for the insertion of the crossbar, and the mounting holes are connected to the armrest slots. The two clamping devices are respectively installed in the two mounting holes. Each clamping device includes an installation base, a clamping element, an operating element, and a transmission element. The installation base is installed and fixed in the mounting hole, and one side of the installation base is also provided with an installation groove. The clamping element is installed in the installation groove and faces the crossbar. The operating element is located on the other side of the installation base relative to the installation groove. The transmission element is connected between the clamping element and the operating element. The operating element is capable of driving the transmission element and causing the transmission element to drive the clamping element to move towards the crossbar and clamp the crossbar. The chair seat is easy for users to assemble armrests on both sides of the seat cushion, and significantly reduces the cost of shipping chair seat products.

Description

seat

The invention relates to a chair seat, in particular to a chair seat having a pressing element and an operating element.

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 chair seat which has the advantages of high efficiency, low cost and easy assembly. The chair base of the present invention is suitable for combining two armrests, and each armrest includes a cross bar. The chair base includes a base and two pressing devices. The base includes at least one armrest slot and two mounting holes. The armrest slot is suitable for inserting the crossbar, and the mounting holes are connected with the armrest slot. In addition, the two tightening devices are installed in the two mounting holes respectively, and each tightening device includes a mounting base, a tightening component, an operating component and a transmission component. 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 clamping element is installed in the mounting groove and faces the crossbar. In addition, the operating element is arranged on the other side of the installation base relative to the installation slot. The transmission element is connected between the pressing element and the operating element. Wherein, the operating element is suitable for driving the transmission element, and the transmission element drives the pressing element to move towards the cross bar and press the cross bar. In the above-mentioned chair seat, the operating element is a rotating handle, and the rotating handle has a central hole, and the transmission element includes a mounting shaft and a pressing member, one end of the mounting shaft is installed in the central hole, The resisting member is installed at the other end of the installation shaft and is located in the installation groove. A first ratchet member is provided on the side of the resisting member close to the installation groove, and the resisting 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 rotating handle is rotated in one direction, the installation shaft will drive the first ratchet piece and the second ratchet piece to move relative to each other, and the pressing piece will drive the pressing element to move toward the crossbar and force it. Tighten the bar. In the above-mentioned chair seat, 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; wherein The installation slot also includes two second limiting members, 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 chair seat, a slide groove is provided on the cross bar of the armrest, and the installation base is also provided with an anti-pull-out piece. The anti-pull-out piece is adapted to interfere with an edge of the chute to prevent Prevent the crossbar from being pulled out of the armrest slot. In the above-mentioned chair seat, an anti-pull-out piece is provided on the cross bar of the armrest, and the installation base is also provided with a slot. The anti-pull-out piece is adapted to interfere with an edge of the slot to prevent The crossbar pulls out of the armrest slot. The above-mentioned chair base also includes two stopper plates, wherein an embedded hole is provided adjacent to each mounting hole of the base, the stopper plate is installed in the embedded hole, and there are also two stopper plates on opposite sides of the installation base. A first engaging edge and a second engaging edge are provided respectively; through the first engaging edge and the second engaging edge, the mounting base is supported on the base, and the first engaging edge and the Stop the sliding plates from touching each other. In the above-mentioned chair seat, the embedding hole and the mounting hole are separated by a support beam, and the first engaging edge is supported on the support beam, and the width of the first engaging edge is greater than The width of the support beam and the width of the interference between the second engaging edge and the base are smaller than the width of the stop plate. In the above-mentioned chair seat, the anti-pull-out plate has an anti-pull-out structure, and the anti-pull-out structure is engaged with the support beam. The invention has the following advantages: it allows users to assemble the armrests on both sides of the chair cushion conveniently and quickly, and it can also reduce the packaging size and greatly reduce the cost of transporting chair seat products. 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 . Enlarged 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 (see 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 (see 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 slot 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 (8)

A chair base is suitable for combining two armrests, and each armrest includes a cross bar. The chair base includes: A base including at least one armrest slot and two mounting holes, the armrest slot is suitable for the cross bar to be inserted, and the mounting hole is connected with the armrest slot; and Two tightening devices are respectively installed in the two mounting holes. Each tightening 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 element, installed in the installation slot and facing the crossbar; An operating component is provided on the other side of the mounting base relative to the mounting slot; and A transmission element connected between the pressing element and the operating element; Wherein, the operating element is suitable for driving the transmission element, and the transmission element drives the pressing element to move towards the cross bar and press the cross bar. The chair seat according to claim 1, wherein the operating element is a rotating handle, and the rotating handle has a central hole, and the transmission element includes a mounting shaft and a pressing member, one end of the mounting shaft is installed on the central hole, and the resisting member is installed at the other end of the installation shaft and is located in the installation groove. The resisting member is provided with a first ratchet member on one side close to the installation groove, and the resisting member resists press 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 is rotated in one direction, the installation shaft will drive the first ratchet member and the second ratchet member to move relative to each other, and the pressing member will drive the pressing element toward the crossbar. Move and tighten the bar. The chair seat according to claim 2, wherein the pressing member further includes two first limiting members, and the two first limiting members are respectively located on both sides of the first ratchet member and are parallel and symmetrical. shape; wherein the installation groove also includes two second limiting parts, the two second limiting parts are respectively located on both sides of the second ratchet part, and are parallel and symmetrical. The chair seat according to claim 1 or claim 2, wherein a slide groove is provided on the cross bar of the armrest, and the installation base is also provided with an anti-pull-out piece, and the anti-pull-out piece is suitable for connecting with the chute. An edge of the rails interferes with each other to prevent the crossbar from being pulled out of the armrest slot. The chair seat according to claim 1 or claim 2, wherein an anti-pull-out piece is provided on the cross bar of the armrest, and the installation base is also provided with a clamping slot, and the anti-pull-out piece is suitable for engaging with the clamping slot. An edge of the rails interferes with each other to prevent the crossbar from being pulled out of the armrest slot. The chair base according to claim 1 or claim 2 further includes two stopper plates, wherein an embedded hole is provided adjacent to each mounting hole of the base, and the stopper plate is installed in the embedded hole, and in the A first engaging edge and a second engaging edge are respectively provided on two opposite sides of the mounting base; through the first engaging edge and the second engaging edge, the mounting base is supported on the base, and The first engaging edge is in contact with the stop plate. The seat of claim 6, wherein the embedding hole and the mounting hole are separated by a support beam, and the first engaging edge is supported on the support beam, and the width of the first engaging edge is greater than the width of the support beam, and the width of the interference between the second engaging edge and the base is less than the width of the stop plate. The chair seat according to claim 7, wherein the anti-pull plate has an anti-pull-out structure, and the anti-pull-out structure is engaged with the support beam.

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