TWM665638U - Adjustable chair - Google Patents

Abstract

An adjustable chair includes a seat, a back frame, a backrest and two armrest structures. The back frame is pivotally connected to the seat and includes two side panels. The backrest is pivotally connected to the back frame. The two armrest structures are respectively pivotally connected to the two side panels. Each of the two armrest structures includes a fixed plate, a pin, a stabilizing element and an armrest bracket. The fixed plate is fixed at one of the two side panels and includes a pivot hole. The pin passes through the pivot hole. The stabilizing element is disposed at the pin. The armrest bracket is locked to the pin. The back frame rotates a first angle to allow the armrest structure to rotate a second angle. The second angle of the armrest structure is smaller than the first angle. Therefore, a using convenience is improved.

Description

Adjustable chair

The invention relates to a chair, in particular to an adjustable chair with an armrest structure.

The prevalence of health awareness has made the public pay more and more attention to ergonomics. The chair we know includes a seat, a backrest and armrests. The backrest is set on the seat, and the armrests are set on the backrest. The chair can be adjusted to a lying position so that the backrest tilts backward. Since the position of the hands of the human body may be different when lying and sitting, the armrests can be further adjusted to meet ergonomics.

However, the adjustment of the armrest can only be achieved by the user manually adjusting the armrest, and for users with hand disabilities, it is impossible to adjust the armrest in this way, and there is still room for improvement.

In order to solve the above problems, the present invention provides an adjustable chair, which can improve the convenience of use through its structural setting.

According to an embodiment of the present invention, an adjustable chair is provided. The adjustable chair comprises a seat, a backrest frame, a backrest plate and two armrest structures. The backrest frame is pivoted to the seat and comprises two side panels. The backrest plate is movably disposed on the backrest frame. The two armrest structures are pivoted to the two side panels respectively, and each armrest structure comprises a fixing plate, a pin, a stabilizing kit and an armrest bracket. The fixing plate is fixed to each side panel and comprises a pivot hole. The pin is inserted into the pivot hole. The stabilizing kit is sleeved on the pin. The armrest bracket is locked with the pin. The backrest frame rotates a first angle relative to the seat, and links each armrest structure to rotate a second angle relative to the seat, and the second angle of each armrest structure is smaller than the first angle.

According to the adjustable chair of the aforementioned embodiment, the first angle can be between 0 degrees and 80 degrees, and the second angle of each armrest structure can be between 0 degrees and 30 degrees.

The adjustable chair according to the above-mentioned embodiment may further include a driving element and a driving rod. The driving element is disposed on the seat. The driving rod is connected to the driving element and one of the two side panels. The driving element drives the driving rod to rotate the chair back frame relative to the seat.

According to the adjustable chair of the aforementioned implementation method, each side panel may include two rails, and each fixed plate may further include a plate body, two sliding parts and two fixing members, the two sliding parts are connected to the plate body and are respectively accommodated in the two rails, and the two fixing members are respectively penetrated through the plate body and locked into the two sliding parts.

The adjustable chair according to the above-mentioned embodiment may further include two connecting rods, each connecting rod may include a first stud, an insertion rod and a second stud. The first stud is arranged on one of the two armrest brackets. One end of the insertion rod is for the first stud to be inserted therein. The second stud is arranged on the seat and inserted on the other end of the insertion rod.

According to the adjustable chair of the aforementioned implementation method, each armrest structure may further include an annular kit, each annular kit is accommodated in each pivot hole, each annular kit is sleeved on each pin and contacts each stabilizing kit.

According to another embodiment of the present invention, an adjustable chair is provided. The adjustable chair includes a seat, a backrest frame and two armrest structures. The backrest frame is pivoted to the seat and includes two side panels. The two armrest structures are pivoted to the two side panels, respectively, and each armrest structure includes a fixing plate, a pin, a stabilizing kit and an armrest bracket. The fixing plate is fixed to each side panel and includes a pivot hole. The pin is inserted into the pivot hole. The stabilizing kit is sleeved on the pin, and the stabilizing kit is elastic. The armrest bracket is locked with the pin. The stabilizing kit is deformed by the pin, and the backrest frame rotates a first angle relative to the seat, which links each armrest structure to rotate a second angle relative to the backrest frame, and the second angle is smaller than the first angle.

In the adjustable chair according to the aforementioned embodiment, the stabilizing kit may have a nylon body.

According to the adjustable chair of the aforementioned embodiment, the first angle can be between 0 degrees and 80 degrees, and the second angle of each armrest structure can be between 0 degrees and 30 degrees.

The adjustable chair according to the above-mentioned embodiment may further include a driving element and a driving rod. The driving element is disposed on the seat. The driving rod is connected to the driving element and one of the two side panels. The driving element drives the driving rod to rotate the chair back frame relative to the seat.

The following will describe the embodiments of the present invention with reference to the drawings. For the sake of clarity, many practical details will be described together in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly known structures and components will be shown in the drawings in a simple schematic manner; and repeated components may be represented by the same number or similar number.

In addition, the terms "first", "second", "third", etc. in this article are only used to describe different elements or components, and do not limit the elements/components themselves. Therefore, the first element/component can also be renamed as the second element/component. Moreover, the combination of elements/components/mechanisms/modules in this article is not a generally known, conventional or familiar combination in this field. Whether the elements/components/mechanisms/modules themselves are known cannot be used to determine whether their combination relationship is easy to be completed by ordinary knowledge in the technical field.

Please refer to Figures 1 to 3, Figure 1 is a three-dimensional schematic diagram of an adjustable chair 100 according to an embodiment of the present invention, Figure 2 is a partial exploded schematic diagram of the adjustable chair 100 of the embodiment of Figure 1, and Figure 3 is an exploded schematic diagram of the armrest structure 140 of the embodiment of Figure 1. The adjustable chair 100 includes a seat 110, a backrest frame 120, a backrest board 130 and two armrest structures 140.

The backrest frame 120 is pivoted to the seat 110 and includes two side panels 121. Two armrest structures 140 are pivoted to the two side panels 121, respectively. Each armrest structure 140 includes a fixing plate 141, a pin 142, a stabilizing member 143 and an armrest bracket 144. The fixing plate 141 is fixed to each side panel 121 and includes a pivot hole 1414. The pin 142 is inserted into the pivot hole 1414. The stabilizing member 143 is sleeved on the pin 142. The armrest bracket 144 is locked with the pin 142. The chair back frame 120 rotates a first angle A1 (marked in FIG. 5 ) relative to the chair seat 110 , and links each armrest structure 140 to rotate a second angle A2 (marked in FIG. 5 ) relative to the chair seat 110 . The second angle A2 of each armrest structure 140 is smaller than the first angle A1 .

Specifically, the seat 110 is generally in the form of a square plate, the backrest frame 120 is in the form of a box, the backrest frame 120 is pivoted to a rear edge of the seat 110, and the backrest board 130 is movably disposed on a side of the backrest frame 120 adjacent to the seat 110, and can be used by a user as a backrest. The adjustable chair 100 may further include a headrest 180, which is disposed on the upper edge of the backrest board 130, and the position and angle of the headrest 180 can be adjusted to meet the needs of the user. It should be particularly noted that the adjustable chair 100 of the present case may have a wheelchair structure, and therefore may include a base frame and a plurality of wheels, the seat 110 may be disposed on the base frame, and the number of wheels may be, for example, four and disposed under the base frame. In order to simplify the illustration, the base frame and wheels are omitted in the present invention, but this does not limit the present invention. Furthermore, in other embodiments, the adjustable chair may also be a general chair including a plurality of chair legs, but is not limited thereto.

As shown in FIG. 1 and FIG. 2 , the adjustable chair 100 may further include a driving element 150 and a driving rod 160 . The driving element 150 is disposed on the seat 110 . The driving rod 160 is connected to the driving element 150 and one of the two side panels 121 . The driving element 150 drives the driving rod 160 to rotate the seat back frame 120 relative to the seat 110 .

The driving element 150 may be, for example, an electric cylinder and include a push rod (not shown), and the driving rod 160 may include a bent rod portion 161, a central portion 162, and a driving portion 163. The push rod may be rotatably disposed at one end of the bent rod portion 161, the other end of the bent rod portion 161 may be integrally disposed at the central portion 162, the central portion 162 may be rotatably disposed at the seat 110, one end of the driving portion 163 may be integrally disposed at the central portion 162, and the other end of the driving portion 163 may be disposed at the side plate 121. When the push rod is retracted, the driving rod 160 rotates clockwise with the center portion 162 as a fulcrum, and the driving portion 163 links the side plate 121, thereby driving the seat back frame 120 and the seat back plate 130 to lie back relative to the seat 110; when the push rod is extended, the driving rod 160 rotates counterclockwise with the center portion 162 as a fulcrum, and the driving portion 163 links the side plate 121, thereby driving the seat back frame 120 and the seat back plate 130 to stand upright relative to the seat 110.

The adjustable chair 100 may further include a backrest plate 130, which is movably disposed on the backrest frame 120. The adjustable chair 100 may include a connecting rod assembly (not shown), which is pivotally connected to the backrest frame 120 and the backrest plate 130 and is pivotally connected to the seat 110. When the driving element 150 is actuated to pivot the backrest frame 120, the backrest plate 130 may move relative to the backrest frame 120. In this way, when the backrest frame 120 is adjusted to tilt relative to the seat 110, the backrest plate 130 may move to match the back of the user, so as to achieve the purpose of not pulling the back of the user, thereby improving the comfort of use.

In the following, the description is made on one side in this embodiment, but the present invention is not limited thereto. As shown in FIG. 1 and FIG. 3 , the side plate 121 may include two rails 1211 , and the fixed plate 141 may further include a plate body 1411 , two sliding parts 1415 , and two fixing members 1416 . The two sliding parts 1415 are connected to the plate body 1411 and are respectively accommodated in the two rails 1211 , and the two fixing members 1416 are respectively penetrated through the plate body 1411 and locked into the two sliding parts 1415 .

The two rails 1211 are recessed on a surface of the side plate 121, and a length extension direction of the two rails 1211 is parallel to a length extension direction of the side plate 121. In this embodiment, the number of the sliding parts 1415 and the fixing parts 1416 can be four, each sliding part 1415 is a square block and has a screw hole structure at the center, wherein two sliding parts 1415 are located on one of the rails 1211, and the other two sliding parts 1415 are located on the other rail 1211, each fixing part 1416 can have a screw structure, and the four fixing parts 1416 are respectively penetrated through the four corners of the plate body 1411 and locked into the four sliding parts 1415, so that the plate body 1411 can be locked to the side plate 121. It should be particularly noted that after the fixing member 1416 is loosened, the handrail structure 140 including the fixing plate 141 can be driven to slide along the length extension direction of the track 1211 to adjust the position of the handrail structure 140.

Please refer to FIG. 4, and refer to FIG. 1 to FIG. 3 together. FIG. 4 is a schematic cross-sectional view of the adjustable chair 100 along the cutting plane line 4-4 of the embodiment of FIG. 1. The fixing plate 141 may further include a boss 1412 and a receiving groove 1413. The boss 1412 is a circular cylinder that protrudes from the plate body 1411 and is passed through by the hinge 1414. The receiving groove 1413 is recessed in the plate body 1411 and faces each side plate 121. The receiving groove 1413 includes a groove bottom 1413a and is connected to the hinge 1414. The pin 142 may first pass through the receiving groove 1413 and then pass through the hinge 1414. Specifically, the pin 142 may include a head 1421, a non-threaded shaft portion 1422 and a threaded shaft portion 1423. The head 1421 is limited in the receiving groove 1413, one end of the non-threaded shaft portion 1422 is connected to the head 1421, and the threaded shaft portion 1423 is connected to the other end of the non-threaded shaft portion 1422. The head 1421 may be located in the receiving groove 1413, and one side of the head 1421 adjacent to the non-threaded shaft portion 1422 is pressed against the groove bottom 1413a of the receiving groove 1413, and the threaded shaft portion 1423 then passes through the pivot hole 1414 and out of the plate body 1411.

The handrail structure 140 may further include an annular sleeve 145, which is received in the pivot hole 1414, and is sleeved on the pin 142 and contacts the stabilizing sleeve 143. Specifically, the annular sleeve 145 is a hollow cylindrical sleeve, and the non-threaded rod portion 1422 of the pin 142 can be passed through it, and because the inner diameter of the annular sleeve 145 is slightly larger than the outer diameter of the non-threaded rod portion 1422, the non-threaded rod portion 1422 can rotate relative to the annular sleeve 145. In this embodiment, the annular set 145 can be a copper sleeve, and the stabilizing set 143 can be elastic and can have a nylon body, that is, the stabilizing set 143 is a one-piece element and is made of nylon. The stabilizing set 143 is deformed under pressure, so it can absorb shock for the handrail structure 140. In other embodiments, the material of the stabilizing set can be any material that can generate elasticity, such as plastic steel or soft metal, but it is not limited thereto.

Please refer to FIG. 3 , the handrail bracket 144 may further include a cover 1441. The cover 1441 includes a groove (not shown) and a screw hole (not shown). The groove is recessed on a surface of the cover 1441. The inner diameter of the groove is slightly larger than the boss 1412 of the fixing plate 141. Therefore, the boss 1412 can be inserted into the groove. Since the screw hole structure is opened in the groove, the screw hole can be locked in the screw rod 1423 of the pin 142. In this way, the handrail bracket 144 can be set on the fixing plate 141.

When the backrest frame 120 and the fixing plate 141 rotate, the fixing plate 141 does not drive the pin 142 to rotate because the non-threaded rod portion 1422 and the head portion 1421 of the pin 142 are only rotatably disposed on the fixing plate 141. Therefore, the fixing plate 141 does not drive the pin 142 to rotate, and the armrest structure 140 can rotate relative to the backrest frame 120. The armrest bracket 144 can further include a frame 1442 and a connecting pin 1443. The frame 1442 can be connected to the cover 1441 through the connecting pin 1443, and the frame 1442 can be pivotally rotated relative to the cover 1441.

As shown in FIG. 2 , the adjustable chair 100 may further include two connecting rods 170, each connecting rod 170 including a first stud 171, an insertion rod 172, and a second stud 173. Each first stud 171 is disposed on each armrest bracket 144. One end of the insertion rod 172 is inserted therein. One end of the second stud 173 is disposed on the seat 110, and the other end of the second stud 173 is inserted into the other end of the insertion rod 172.

Specifically, two linkage rods 170 are respectively disposed on two sides of the adjustable chair 100 and can support the armrest structure 140. The following description is based on one side, but this does not limit the present invention. The first stud 171 and the second stud 173 have threads and can be locked to the two ends of the insertion rod 172 respectively. The cover 1441 can be connected to the other end of the first stud 171, and the aforementioned one end of the second stud 173 is rotatably disposed on the seat 110. When the backrest frame 120 and the armrest structure 140 rotate relative to the seat 110, the first stud 171, the insertion rod 172 and the second stud 173 can be driven to rotate together. It should be particularly noted that when the position of the armrest structure 140 is to be adjusted, the sliding portion 1415 and the fixing member 1416 must be adjusted to move along the length extension direction of the side panel 121. At this time, the length of the connecting rod 170 must also be adjusted accordingly. For example, when the armrest structure 140 approaches the seat 110 along the length extension direction of the side panel 121, the first stud 171 and the second stud 173 can be rotated to penetrate the insertion rod 172, so that the length of the connecting rod 170 is shortened; conversely, when the armrest structure 140 moves away from the seat 110 along the length extension direction of the side panel 121, the first stud 171 and the second stud 173 can be rotated to move away from the insertion rod 172, so that the length of the connecting rod 170 is increased. In addition, the angle of the armrest structure 140 can be fine-tuned by shortening or lengthening the length of the connecting rod 170. When the length of the connecting rod 170 is shortened, the angle of the armrest structure 140 relative to the seat 110 increases, and when the length of the connecting rod 170 is lengthened, the angle of the armrest structure 140 relative to the seat 110 decreases.

Please refer to Fig. 5 together with Fig. 1 to Fig. 4. Fig. 5 is a side view of the adjustable chair 100 of the embodiment of Fig. 1. When the driving element 150 rotates the backrest frame 120 through the driving rod 160, the armrest structure 140 and the backrest frame 120 may not rotate at the same angle because the armrest structure 140 is pivotally disposed on the backrest frame 120.

Specifically, when the adjustable chair 100 is in an initial state, the angle of the backrest frame 120 relative to the seat 110 is 85 degrees, and the angle of the armrest structure 140 relative to the seat 110 is 5 degrees. During the reclining process, when the backrest frame 120 rotates, the armrest structure 140 can be rotated together, but the seat 110 remains horizontal and is not linked to the backrest frame 120 or the armrest structure 140. The angle of the backrest frame 120 relative to the seat 110 is the first angle A1 (in this embodiment, because the seat 110 remains horizontal, the angle of the backrest frame 120 is the first angle A1). The first angle A1 is between 0 degrees and 80 degrees, so the maximum angle of the backrest frame 120 relative to the seat 110 can be 165 degrees; each armrest structure 140 rotates relative to the seat 110. The angle of movement is the second angle A2 (in the present embodiment, since the seat 110 is maintained horizontal, the angle of rotation of each armrest structure 140 is the second angle A2). The second angle A2 of each armrest structure 140 is between 0 and 30 degrees, so the maximum angle of the chair back frame 120 relative to the seat 110 can be 35 degrees. At any time, the second angle A2 is smaller than the first angle A1. The armrest structure 140 can therefore be located at a position suitable for the user's hand placement, which is ergonomic. In addition, since there is no need to manually adjust the armrest structure 140, it helps to improve the convenience of the user.

Through the above embodiments, it can be seen that the present invention has the following advantages: 1. When the chair back frame rotates, it can also link the armrest structure, so that the armrest structure automatically rotates to a more suitable position, which can improve the convenience and comfort of use; and 2. By making the stabilizing kit elastic, it can further avoid vibration when the armrest structure rotates.

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various 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 defined in the attached patent application.

100: Adjustable chair 110: Seat 120: Backrest frame 121: Side panel 1211: Track 130: Backrest 140: Armrest structure 141: Fixed plate 1411: Plate body 1412: Boss 1413: Receiving groove 1413a: Groove bottom 1414: Pivot 1415: Sliding part 1416: Fixing part 142: Pin 1421: Head 1422: Screwless rod part 1423: Screw rod part 143: Stabilizing kit 144: Armrest bracket 1441: Cover body 1442: Frame body 1443: Connecting pin 145: Ring kit 150: Driving element 160: Driving rod 161: Bend rod 162: Center part 163: Driving part 170: Link rod 171: First stud 172: Insert rod 173: Second stud 180: Headrest A1: First angle A2: Second angle

FIG. 1 is a three-dimensional schematic diagram of an adjustable chair according to an embodiment of the present invention; FIG. 2 is a partial exploded schematic diagram of the adjustable chair of the embodiment of FIG. 1; FIG. 3 is an exploded schematic diagram of the armrest structure of the embodiment of FIG. 1; FIG. 4 is a cross-sectional schematic diagram of the adjustable chair of the embodiment of FIG. 1 along the cutting line 4-4: and FIG. 5 is a side schematic diagram of the adjustable chair of the embodiment of FIG. 1.

100: Adjustable chair

110: Seat

120: Seat back frame

121: Side panels

130: Chair backrest

140:Handrail structure

150: Driving element

160:Drive rod

170: Linkage rod

180: Headrest

Claims (10)

An adjustable chair comprises: a seat; a backrest frame pivotally connected to the seat and comprising two side panels; a backrest plate movably arranged on the backrest frame; and two armrest structures pivotally connected to the two side panels, each of the two armrest structures comprising: a fixing plate fixed to each of the two side panels and comprising a pivot hole; a pin inserted through the pivot hole; a stabilizing kit sleeved on the pin; and an armrest bracket locked with the pin; wherein the backrest frame rotates a first angle relative to the seat, linking each of the two armrest structures to rotate a second angle relative to the seat, and the second angle of each of the two armrest structures is smaller than the first angle. An adjustable chair as described in claim 1, wherein the first angle is between 0 degrees and 80 degrees, and the second angle of each of the two armrest structures is between 0 degrees and 30 degrees. The adjustable chair as described in claim 1 further comprises: a driving element disposed on the seat; and a driving rod connected to the driving element and one of the two side panels; wherein the driving element drives the driving rod to rotate the chair back frame relative to the seat. An adjustable chair as described in claim 1, wherein each of the two side panels includes two rails, and each of the two fixed panels further includes a plate body, two sliding parts and two fixing members, the two sliding parts are connected to the plate body and are respectively accommodated in the two rails, and the two fixing members are respectively passed through the plate body and locked into the two sliding parts. The adjustable chair as described in claim 1 further comprises two connecting rods, each of which comprises: a first stud disposed on one of the two armrest brackets; an insertion rod, one end of which is for the first stud to be inserted therein; and a second stud disposed on the seat and inserted into the other end of the insertion rod. As described in claim 1, the adjustable chair, wherein each of the two armrest structures further comprises an annular kit, each of the two annular kits is accommodated in each of the two pivot holes, each of the two annular kits is sleeved on each of the two pins and contacts each of the two stabilizing kits. An adjustable chair comprises: a seat; a backrest frame pivotally connected to the seat and comprising two side panels; and two armrest structures pivotally connected to the two side panels, each of the two armrest structures comprising: a fixing plate fixed to each of the two side panels and comprising a pivot hole; a pin inserted through the pivot hole; a stabilizing kit sleeved on the pin, and the stabilizing kit is elastic; and an armrest bracket locked with the pin; wherein the stabilizing kit is deformed by the pin, the backrest frame rotates a first angle relative to the seat, and each of the two armrest structures rotates a second angle relative to the backrest frame, and the second angle is smaller than the first angle. An adjustable chair as described in claim 7, wherein the stabilization kit has a nylon body. An adjustable chair as described in claim 7, wherein the first angle is between 0 degrees and 80 degrees, and the second angle of each of the two armrest structures is between 0 degrees and 30 degrees. The adjustable chair as described in claim 7 further comprises: a driving element disposed on the seat; and a driving rod connected to the driving element and one of the two side panels; wherein the driving element drives the driving rod to rotate the chair back frame relative to the seat.

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