Adjustable chair

Abstract

Provided in the present invention is an adjustable chair, comprising a seat, a back support, a backrest sliding mechanism, a backrest linkage mechanism, and a driving mechanism, wherein the back support comprises a first rail and a second rail; the backrest linkage mechanism is connected to a backrest assembly and guided by the second rail; and the driving mechanism drives the back support to rotate relative to the seat, such that the backrest assembly moves relative to the back support. Thus, the comfort of use can be improved.

Description

Adjusting chair Technical Field

[0001] This invention relates to an adjustable chair, and more particularly to an adjustable chair with a reclining back. Background Technology

[0002] A chair typically consists of a seat and a backrest, which provides support for the user's back. To enhance comfort, most chairs have an adjustable backrest, allowing the backrest to pivot relative to the seat, thus enabling the user's back to recline.

[0003] When adjusting the chair back, most users will straighten their upper body first and then adjust the chair back. However, for some elderly people or users who are unable to move independently, their upper body must lean against the chair back. Therefore, adjusting the angle will pull on their back and cause discomfort.

[0004] In view of this, improving the structure of chairs to enhance user comfort has become a goal pursued by relevant practitioners.

[0005] Summary of the Invention

[0006] This invention provides an adjustable chair that improves user comfort through structural configuration.

[0007] According to one embodiment of the present invention, an adjustable chair is provided, comprising a seat, a backrest support, a backrest sliding mechanism, a backrest linkage mechanism, and a drive mechanism. The backrest support is pivotally mounted on the seat and includes a first track and a second track. The first track has a first guiding direction parallel to the length direction of the backrest support. The second track is spaced apart from the first track and has a second guiding direction parallel to the length direction. The backrest sliding mechanism includes a sliding component and a backrest component. The sliding component is movably disposed on the first track. The backrest component is connected to the sliding component. The backrest linkage mechanism is connected to the backrest component and guided by the second track. The drive mechanism is connected to the backrest support. The drive mechanism drives the backrest support to rotate relative to the seat, and the backrest linkage mechanism moves along the second track and drives the sliding component to move within the first track, causing the backrest component to move relative to the backrest support.

[0008] According to the aforementioned embodiment of the adjustable chair, the first track may include a track frame and an inner pad, with the inner pad disposed within the track frame. The sliding component has a rod-like structure to engage with the inner pad.

[0009] According to the aforementioned embodiment of the adjustable chair, the track frame may include at least one positioning groove, and the inner pad includes at least one positioning rib, wherein the at least one positioning rib protrudes into the at least one positioning groove.

[0010] According to the aforementioned embodiment of the adjustable chair, the track frame may have a metal body and the inner pad has a grooved plastic body.

[0011] According to the aforementioned embodiment of the adjustable chair, the drive mechanism may include a fixed plate, a push rod, and an actuator. One end of the fixed plate is connected to the backrest support. The push rod is connected to the other end of the fixed plate, and the actuator is connected to and drives the push rod.

[0012] According to the aforementioned embodiment of the adjustable chair, the backrest linkage mechanism may include a connecting rod, a swing arm, a first slide rod, a slide base, and a second slide rod. The connecting rod is pivotally connected to the backrest assembly. One end of the swing arm is pivotally connected to the backrest support and the other end is pivotally connected to the connecting rod; the swing arm includes at least two pivot holes. The upper end of the first slide rod is pivotally connected to any one of the aforementioned at least two pivot holes, and the lower end of the first slide rod is limited by a second track. The slide base is slidably disposed on the second track and pivotally connected to the first slide rod. One end of the second slide rod is pivotally connected to the slide base and the other end is pivotally connected to the chair seat.

[0013] According to another embodiment of the present invention, an adjustable chair is provided, comprising a seat, a backrest support, a backrest sliding mechanism, a backrest linkage mechanism, and a drive mechanism. The backrest support is pivotally mounted on the seat and includes a first track. The first track has a first guiding direction parallel to the length direction of the backrest support, and includes a track frame and an inner pad. The inner pad is disposed within the track frame and forms a guiding space. The backrest sliding mechanism includes a sliding component and a backrest component. The sliding component is movably accommodated in the guiding space and has a rod-like structure to cooperate with the guiding space. The backrest component is connected to the sliding component. The backrest linkage mechanism is connected to the backrest component. The drive mechanism is connected to the backrest support. The drive mechanism drives the backrest support to rotate relative to the seat, and the backrest linkage mechanism drives the sliding component to move within the first track, causing the backrest component to move relative to the backrest support.

[0014] According to the aforementioned embodiment of the adjustable chair, the track frame may include at least one positioning groove, and the inner pad includes at least one positioning rib, wherein the at least one positioning rib protrudes into the at least one positioning groove.

[0015] According to the aforementioned embodiment of the adjustable chair, the track frame may have a metal body and the inner pad has a grooved plastic body.

[0016] According to the aforementioned embodiment of the adjustable chair, the drive mechanism may include a fixed plate, a push rod, and an actuator. One end of the fixed plate is connected to the backrest support. The push rod is connected to the other end of the fixed plate. The actuator is connected to and drives the push rod. Attached Figure Description

[0017] Figure 1 is a perspective view of an adjustable chair according to an embodiment of the present invention;

[0018] Figure 2 is a partial exploded view of the adjustable chair in the embodiment of Figure 1 of the present invention;

[0019] Figure 3 is a partially enlarged schematic diagram of the adjustable chair in the embodiment of Figure 1 of the present invention;

[0020] Figure 4 is a partial cross-sectional view of the adjustable chair in the embodiment of Figure 1 of the present invention along the cut line 4-4;

[0021] Figure 5 is a front view of the sliding assembly, backrest sliding mechanism and backrest support of the adjustable chair in the embodiment of Figure 1 of the present invention.

[0022] Figure 6 is another front view schematic diagram of the sliding assembly, backrest sliding mechanism and backrest support of the adjustable chair in the embodiment of Figure 1 of the present invention.

[0023] Figure label:

[0024] 100: Adjustable chair

[0025] 1100: Back Support

[0026] 1110: First Track

[0027] 1111: Track Frame

[0028] 1111a: Positioning groove

[0029] 1112: Inner pad

[0030] 1112a: Positioning Rib

[0031] 1120: Settings panel

[0032] 1130: Locking plate

[0033] 1140: Second Track

[0034] 1200: Back-mounted sliding mechanism

[0035] 1210: Sliding component

[0036] 1211: Locking part

[0037] 1212: Sliding part

[0038] 1220: Back-mounted components

[0039] 1300: Back-to-back linkage mechanism

[0040] 1310: Connecting rod

[0041] 1320: Swing

[0042] 1321: Pivot Hole

[0043] 1330: First slider

[0044] 1340: Slide

[0045] 1350: Second slide bar

[0046] 1500: Chair Seat

[0047] 1600: Drive mechanism

[0048] 1610: Fixing plate

[0049] 1611: Pivot

[0050] 1620: Putter

[0051] 1630: Actuator

[0052] 1631: Telescopic pole Detailed Implementation

[0053] Embodiments of the present invention will now be described with reference to the accompanying drawings. For clarity, many practical details will be set forth in the following description. However, the reader should understand that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity in the drawings, some known and conventional structures and components will be illustrated in a simple schematic manner; and repeated components may be denoted by the same or similar designations.

[0054] Furthermore, the terms "first," "second," and "third" used in this article are merely used to describe different components or ingredients, and do not impose any restrictions on the components / components themselves. Therefore, the first component / component can also be referred to as the second component / component. Moreover, the combinations of components / components / mechanisms / modules in this article are not combinations generally known, conventional, or known in this field. Whether the components / components / mechanisms / modules themselves are known cannot be used to determine whether their combination relationships are easily accomplished by someone with ordinary knowledge in the technical field.

[0055] Please refer to Figures 1 and 2, where Figure 1 is a perspective view of an adjustable chair 100 according to an embodiment of the present invention, and Figure 2 is a partially exploded view of the adjustable chair 100 of the embodiment of Figure 1. The adjustable chair 100 includes a seat 1500, a backrest support 1100, a backrest sliding mechanism 1200, a backrest linkage mechanism 1300, and a drive mechanism 1600. The backrest support 1100 is pivotally mounted on the seat 1500 and includes a first track 1110. The first track 1110 has a first guiding direction parallel to the length direction of the backrest support 1100. The backrest sliding mechanism 1200 includes a sliding component 1210 and a backrest component 1220. The sliding component 1210 is movably disposed on the first track 1110. The backrest component 1220 is connected to the sliding component 1210. The backrest linkage mechanism 1300 is connected to the backrest component 1220. The drive mechanism 1600 drives the back support 1100 to rotate relative to the seat 1500, and the backrest linkage mechanism 1300 drives the sliding component 1210 to move within the first track 1110, so that the backrest component 1220 moves relative to the back support 1100.

[0056] Thus, through the configuration of the back support 1100, the back sliding mechanism 1200, the back linkage mechanism 1300 and the drive mechanism 1600, the back support component 1220 can slide relative to the back support 1100 when the back support 1100 pivots, without affecting the user and improving the comfort of use.

[0057] The adjustable chair 100 of the present invention may have a wheelchair structure, and therefore may further include a base frame and at least three wheels. A seat 1500 is disposed on the base frame, and the number of wheels may, for example, be four and disposed on the base frame. For the sake of brevity, the base frame and wheels are omitted in the present invention, but this does not limit the invention. Furthermore, in other embodiments, the adjustable chair may also be a general chair and include chair legs, and is not limited thereto.

[0058] Please refer to Figures 3 and 4, and also to Figure 2. Figure 3 is a partially enlarged schematic diagram of the adjustable chair 100 of the embodiment of Figure 1, and Figure 4 is a partially cross-sectional schematic diagram of the adjustable chair 100 of the embodiment of Figure 1 along section line 4-4. In the embodiments of Figures 1 to 4, there are two first tracks 1110, which are symmetrically arranged. Each first track 1110 includes a track frame 1111 and an inner pad 1112. The inner pad 1112 is disposed within the track frame 1111 and forms a guide space. The track frame 1111 may have a metal body, and the inner pad 1112 may have a groove-shaped plastic body.

[0059] Specifically, the back support 1100 may further include a mounting plate 1120 and a locking plate 1130. The mounting plate 1120 is on which the backrest linkage mechanism 1300 is mounted, and the locking plate 1130 is located above the mounting plate 1120. Two track frames 1111 are located on both sides of the mounting plate 1120. Each track frame 1111 is divided into a front half and a rear half by the mounting plate 1120. The side of each front half facing the mounting plate 1120 forms an elongated groove to accommodate each inner pad 1112. The side of each front half away from the mounting plate 1120 can form a locking groove. The two rear halves can form an assembly space with the mounting plate 1120, and other components can be assembled in the device space.

[0060] The track frame 1111 is made of metal and has a metal body. The inner pad 1112 can be locked to the locking plate 1130. It is made of plastic and has a groove-shaped plastic body, which is placed in a long groove to cooperate with the track frame 1111. The heterogeneous configuration produces wear-resistant and self-lubricating effects. The track frame 1111 may include at least one positioning groove 1111a, and the inner pad 1112 includes at least one positioning rib 1112a, which protrudes into the at least one positioning groove 1111a. As shown in Figure 3, the number of positioning grooves 1111a can be three, and each positioning groove 1111a extends along the length direction. The number of positioning ribs 1112a can also match the number of positioning grooves 1111a to be three, thus ensuring a stable connection between the inner pad 1112 and the track frame 1111. It should be noted that the track frame in this case refers to a structure that forms a long groove to accommodate an inner pad. It may be made independently as a track frame and then connected to other components through other fixing methods, or it may include other extensions and be used as a side panel or front panel, not limited to the above disclosure.

[0061] The back support 1100 may further include two second rails 1140, which are disposed on the mounting plate 1120 and arranged symmetrically. Each second rail 1140 may be located in the lower half of the mounting plate 1120. Each second rail 1140 includes a guide groove, the two guide grooves are opposite to each other, and the second rail 1140 can be used to limit the first slide bar 1330.

[0062] The backrest sliding mechanism 1200 comprises two sliding components 1210. Each sliding component 1210 is movably accommodated in the guide space of each inner pad 1112, and each sliding component 1210 has a rod-like structure to cooperate with the guide space, thereby stabilizing the sliding and reducing noise. Specifically, as shown in Figures 2 and 3, each sliding component 1210 includes a locking part 1211 and a sliding part 1212. The locking part 1211 and the sliding part 1212 are connected to form an L-shape, and the sliding part 1212 protrudes into the guide space. The locking part 1211 can be locked to the backrest component 1220. The backrest component 1220 provides support for the user's back.

[0063] Please refer to Figures 5 and 6, and also to Figure 2. Figure 5 shows a front view of the sliding assembly 1210, backrest sliding mechanism 1200, and backrest support 1100 of the adjustable chair 100 of the embodiment of Figure 1. Figure 6 shows another front view of the sliding assembly 1210, backrest sliding mechanism 1200, and backrest support 1100 of the adjustable chair 100 of the embodiment of Figure 1. As shown in Figures 2, 5, and 6, the backrest linkage mechanism 1300 may include a connecting rod 1310, a swing rod 1320, and a first slide rod 1330. The connecting rod 1310 is pivotally connected to the backrest assembly 1220. One end of the swing rod 1320 is pivotally connected to the backrest support 1100, and the other end is pivotally connected to the connecting rod 1310. The swing rod 1320 includes at least two pivot holes 1321. The upper end of the first slide rod 1330 is pivotally connected to any one of the aforementioned at least two pivot holes 1321. The drive mechanism 1600 is connected to the back support 1100.

[0064] Specifically, the left end of the swing arm 1320 is pivotally connected to the mounting plate 1120 and can pivot relative to the mounting plate 1120; the right end of the swing arm 1320 can be connected to the upper end of the connecting rod 1310, and the lower end of the connecting rod 1310 is pivotally connected to the back plate of the backrest assembly 1220. Thus, the connecting rod 1310 can pivot simultaneously relative to both the swing arm 1320 and the back plate. The swing arm 1320 has three of the aforementioned at least two pivot holes 1321, and the pivot holes 1321 are arranged between the two ends of the swing arm 1320. The upper end of the first slide rod 1330 can, for example, be pivotally connected to the leftmost pivot hole 1321, and the lower end of the first slide rod 1330 can be limited by two second tracks 1140. When the first slide bar 1330 moves along the second track 1140, it can drive the swing bar 1320 to swing and connect with the connecting rod 1310, thereby causing the backrest assembly 1220 to slide. The upper end of the first slide bar 1330 can be pivotally connected to different pivot holes 1321, thereby adjusting the range of movement of the backrest assembly 1220 relative to the back support 1100. In other embodiments, the swing bar and the connecting rod can be an integral structure, with one end of the connecting rod pivotally connected to the backrest assembly and connected to the slider. The back support may further include a third track located on the mounting plate, with the slider sliding within the third track.

[0065] The backrest linkage mechanism 1300 may further include a slide 1340 and a second slide rod 1350. The slide 1340 is slidably disposed on the second track 1140 and pivotally connected to the first slide rod 1330. One end of the second slide rod 1350 is pivotally connected to the slide 1340 and the other end is pivotally connected to the seat 1500. The slide 1340 may include a seat body (not shown) and four pulleys (not shown), two of which are located on one side of the seat body and accommodated in the second track 1140 therein, and the other two pulleys are located on the other side of the seat body and accommodated in another second track 1140. When the slide 1340 moves within the second track 1140, it can actuate the first slide rod 1330. In other embodiments, the backrest linkage mechanism can be any combination of links, and the backrest support may include a track and a linkage, but may not include a track, and is not limited to the above disclosure.

[0066] As shown in Figure 2, the drive mechanism 1600 may include a fixed plate 1610, a push rod 1620, and an actuator 1630. One end of the fixed plate 1610 is connected to the back support 1100. The push rod 1620 is connected to the other end of the fixed plate 1610, and the actuator 1630 is connected to and drives the push rod 1620. Specifically, the actuator 1630 may be an electric cylinder, which may include a telescopic rod 1631. The fixed plate 1610 may include a pivot 1611. When the upper end of the fixed plate 1610 is locked into the locking groove facing outward of the track frame 1111, the lower end will protrude from the track frame 1111. The pivot 1611 may protrude from the inner side of the lower end and be pivotally connected to the seat 1500. The upper end of the push rod 1620 may be fixed to the outer side of the lower end, and the lower end of the push rod 1620 may be pivotally connected to the telescopic rod 1631.

[0067] Therefore, as shown in Figures 5 and 6, when the telescopic rod 1631 of the actuator 1630 retracts, it can drive the push rod 1620 and the fixing plate 1610, and the back support 1100 to pivot. At this time, since the second slide rod 1350 is pivotally connected to the seat 1500, the slide 1340 is limited by the second slide rod 1350 and moves within the second track 1140, driving the first slide rod 1330 to move downward, and causing the swing rod 1320 to rotate around the left end as the pivot point, driving the connecting rod 1310 to move the backrest assembly 1220, so that the sliding assembly 1210 can slide within the first track 1110.

[0068] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An adjustable chair, characterized in that, Include: Seat; Backrest support, pivotally mounted on the seat and comprising: A first track, having a first guiding direction parallel to the length direction of the back support; and The second track is spaced apart from the first track and has a second guiding direction, which is parallel to the length direction; The back-sliding mechanism includes: A sliding component is movably disposed on the first track; and Backing component, connect to the sliding component; A backrest linkage mechanism, connecting the backrest assembly and guided by the second track; and The drive mechanism is connected to the back support; The drive mechanism causes the back support to rotate relative to the seat, and the backrest linkage mechanism moves along the second track and moves the sliding component within the first track, so that the backrest component moves relative to the back support.

2. The adjustable chair as described in claim 1, characterized in that, The first orbit contains: Track frame; and The inner pad is set inside the track frame; The sliding component has a rod-shaped structure to fit the inner pad.

3. The adjustable chair as described in claim 2, characterized in that, The track frame includes at least one positioning groove, and the inner pad includes at least one positioning rib that protrudes into the at least one positioning groove.

4. The adjustable chair as described in claim 3, characterized in that, The track frame has a metal body, and the inner pad has a grooved plastic body.

5. The adjustable chair as described in claim 1, characterized in that, The drive mechanism includes: A fixing plate, one end of which is connected to the back support; The push rod connects to the other end of the fixed plate, and The actuator connects to and drives the push rod.

6. The adjustable chair as described in claim 1, characterized in that, The back-link mechanism includes: The connecting rod is pivotally connected to the backrest assembly; A swing arm, one end of which is pivotally connected to the back support and the other end of which is pivotally connected to the connecting rod, the swing arm including at least two pivot holes; A first slide rod, the upper end of which is pivotally connected to any one of the at least two pivot holes, and the lower end of which is limited by the second track; A slide block, slidably disposed on the second track and pivotally connected to the first slide rod; and The second slide rod has one end pivotally connected to the slide block and the other end pivotally connected to the chair seat.

7. An adjustable chair, characterized in that, Include: Seat; A back support, pivotally mounted on the chair seat and including a first track, the first track having a first guiding direction parallel to the length direction of the back support, and the first track comprising: Track frame; and The inner pad is set inside the track frame and forms a guide space; The back-sliding mechanism includes: A sliding component is movably accommodated in the guide space, and the sliding component has a rod-like structure to cooperate with the guide space; and Backing component, connect to the sliding component; A back-linking mechanism connects the back-linking assembly; as well as The drive mechanism is connected to the back support; The drive mechanism causes the back support to rotate relative to the seat, and the backrest linkage mechanism drives the sliding component to move within the first track, so that the backrest component moves relative to the back support.

8. The adjustable chair as described in claim 7, characterized in that, The track frame includes at least one positioning groove, and the inner pad includes at least one positioning rib that protrudes into the at least one positioning groove.

9. The adjustable chair as described in claim 8, characterized in that, The track frame has a metal body, and the inner pad has a grooved plastic body.

10. The adjustable chair as described in claim 7, characterized in that, The drive mechanism includes: A fixing plate, one end of which is connected to the back support; The push rod connects to the other end of the fixed plate; and The actuator connects to and drives the push rod.

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