Adjusting chair

Abstract

The utility model provides an adjusting chair which comprises a chair seat, a back support, a backrest sliding mechanism, a backrest connecting rod mechanism and a driving mechanism. The back support comprises a first track and a second track. The first guide direction of the first track is parallel to the length direction of the back support. The second track and the first track are arranged at intervals and have a second guiding direction, and the second guiding direction is parallel to the length direction. The backrest sliding mechanism comprises a sliding assembly and a backrest assembly. The sliding assembly is movably arranged on the first rail. The backrest assembly is connected with the sliding assembly. The backrest connecting rod mechanism is connected with the backrest assembly and is guided by the second track. The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism is linked with the sliding assembly to move in the first rail, so that the backrest assembly moves relative to the back support. Therefore, the use comfort can be improved.

Description

Technical Field

[0001] The utility model relates to an adjustable chair, in particular to an adjustable chair with a tiltable back. Background Art

[0002] A chair generally comprises a seat and a backrest, wherein the backrest is provided for supporting the back of the person. To enhance user comfort, most chairs have a backrest adjustment function, which allows the backrest to pivot relative to the seat, thereby allowing the person's back to tilt relative to the seat.

[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 physically disabled, their upper body must lean on the chair back, so adjusting the angle will pull on the back, causing discomfort.

[0004] In view of this, how to improve the structure of the chair to enhance its comfort has become the goal pursued by relevant practitioners. Utility Model Content

[0005] The utility model provides an adjustable chair, which can improve the comfort of use through structural configuration.

[0006] According to one embodiment of the present invention, an adjustable chair is provided, comprising a seat, a back support, a backrest sliding mechanism, a backrest connecting rod mechanism and a driving mechanism. The back support is pivotally mounted on the seat and comprises a first track and a second track. The first track has a first guiding direction parallel to the length direction of the back support. The second track is spaced apart from the first track and has a second guiding direction, which is parallel to the length direction. The backrest sliding mechanism comprises a sliding assembly and a backrest assembly. The sliding assembly is movably mounted on the first track. The backrest assembly is connected to the sliding assembly. The backrest connecting rod mechanism is connected to the backrest assembly and is guided by the second track. The driving mechanism is connected to the back support. The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism moves along the second track and links the sliding assembly to move within the first track, so that the backrest assembly moves relative to the back support.

[0007] According to the aforementioned embodiment of the adjustable chair, the first track may include a track frame and an inner pad, wherein the inner pad is disposed in the track frame, wherein the sliding component has a rod-shaped structure to match the inner pad.

[0008] According to the adjustable chair of the aforementioned embodiment, the track frame may include at least one positioning groove, and the inner pad may include at least one positioning rib, wherein the at least one positioning rib protrudes into the at least one positioning groove.

[0009] According to the aforementioned embodiment of the adjustable chair, the track frame may have a metal body, and the inner pad may have a channel-shaped plastic body.

[0010] 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 back 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.

[0011] According to the aforementioned embodiment of the adjustable chair, the backrest linkage mechanism may include a connecting rod, a rocker rod, a first slide rod, a slide seat, and a second slide rod. The connecting rod is pivotally connected to the backrest assembly. The rocker rod has one end pivotally connected to the back support and the other end pivotally connected to the connecting rod, and the rocker rod includes at least two pivot holes. The upper end of the first slide rod is pivotally connected to one of the at least two pivot holes, and the lower end of the first slide rod is limited by a second track. The slide seat is slidably disposed on the second track and pivotally connected to the first slide rod. The second slide rod has one end pivotally connected to the slide seat and the other end pivotally connected to the seat.

[0012] According to another embodiment of the present invention, an adjustable chair is provided, comprising a seat, a back support, a backrest sliding mechanism, a backrest connecting rod mechanism and a driving mechanism. The back support is pivotally mounted on the seat and comprises a first track, the first track having a first guide direction parallel to the length direction of the back support, and the first track comprises a track frame and an inner pad. The inner pad is disposed in the track frame and forms a guiding space. The backrest sliding mechanism comprises a sliding assembly and a backrest assembly, the sliding assembly is movably accommodated in the guiding space, and the sliding assembly has a rod-shaped structure to cooperate with the guiding space. The backrest assembly is connected to the sliding assembly. The backrest connecting rod mechanism is connected to the backrest assembly. The driving mechanism is connected to the back support. The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism drives the sliding assembly to move in the first track, so that the backrest assembly moves relative to the back support.

[0013] According to the adjustable chair of the aforementioned embodiment, the track frame may include at least one positioning groove, and the inner pad may include at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove.

[0014] According to the adjustable chair of the aforementioned embodiment, the track frame may have a metal body, and the inner pad may have a channel-shaped plastic body.

[0015] In the adjustable chair according to the aforementioned embodiment, the drive mechanism may include a fixed plate, a push rod, and an actuator. One end of the fixed plate is connected to the back support. The push rod is connected to the other end of the fixed plate. The actuator is connected to and drives the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of an adjustable chair according to one embodiment of the present utility model;

[0017] Figure 2 This utility model Figure 1 A partially exploded schematic diagram of an adjustable chair according to an embodiment of the present invention;

[0018] Figure 3 This utility model Figure 1 A partially enlarged schematic diagram of an adjustable chair according to an embodiment of the present invention;

[0019] Figure 4 This utility model Figure 1 A partial cross-sectional view of the adjustable chair along the cutting line 4-4 of the embodiment;

[0020] Figure 5 This utility model Figure 1 A schematic front view of the sliding assembly, backrest sliding mechanism and back support of the adjustable chair in the embodiment;

[0021] Figure 6 This utility model Figure 1 Another front view of the sliding assembly, backrest sliding mechanism and back support of the adjustable chair of the embodiment.

[0022] Reference numerals:

[0023] 100: Adjustable chair

[0024] 1100: Back support

[0025] 1110: First track

[0026] 1111: Track frame

[0027] 1111a: Positioning groove

[0028] 1112:Inner pad

[0029] 1112a: Positioning ribs

[0030] 1120: Setting board

[0031] 1130: Lock plate

[0032] 1140: Second track

[0033] 1200: Back sliding mechanism

[0034] 1210: Sliding component

[0035] 1211: Locking part

[0036] 1212: Sliding part

[0037] 1220: Backrest assembly

[0038] 1300: Back-to-back linkage

[0039] 1310: Connecting rod

[0040] 1320:Swing rod

[0041] 1321: pivot hole

[0042] 1330: First Slide

[0043] 1340: Slide

[0044] 1350: Second Slide

[0045] 1500: Chair seat

[0046] 1600: Driving mechanism

[0047] 1610:Fixed plate

[0048] 1611: Pivot

[0049] 1620: Putter

[0050] 1630:Actuator

[0051] 1631: Telescopic rod DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be included in the following description. However, the reader should understand that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some known and commonly used structures and components are depicted in simplified schematic form; and repeated components may be represented using the same or similar numbers.

[0053] Furthermore, terms such as "first," "second," and "third" are used herein to describe different components or elements, and do not limit the components / elements themselves. Therefore, a "first component / element" may also be referred to as a "second component / element." Furthermore, the combinations of components / elements / mechanisms / modules herein are not generally known, conventional, or known in the art. The known nature of the components / elements / mechanisms / modules themselves cannot be used to determine whether their combinations are easily accomplished by one of ordinary skill in the art.

[0054] See also Figure 1 and Figure 2 ,in Figure 1 This is a three-dimensional schematic diagram of an adjustable chair 100 according to one embodiment of the present invention. Figure 2 yes Figure 1A partially exploded schematic diagram of an adjustable chair 100 according to an embodiment. The adjustable chair 100 includes a seat 1500, a back support 1100, a backrest sliding mechanism 1200, a backrest linkage mechanism 1300, and a drive mechanism 1600. The back support 1100 is pivotally mounted on the seat 1500 and includes a first track 1110. The first track 1110 has a first guide direction parallel to the length of the back support 1100. The backrest sliding mechanism 1200 includes a sliding assembly 1210 and a backrest assembly 1220. The sliding assembly 1210 is movably mounted on the first track 1110. The backrest assembly 1220 is connected to the sliding assembly 1210. The backrest linkage mechanism 1300 is connected to the backrest assembly 1220. The driving mechanism 1600 drives the back support 1100 to rotate relative to the seat 1500 , and the backrest link mechanism 1300 drives the sliding assembly 1210 to move within the first track 1110 , so that the backrest assembly 1220 moves relative to the back support 1100 .

[0055] Thus, through the configuration of the back support 1100, the backrest sliding mechanism 1200, the backrest connecting rod mechanism 1300 and the driving mechanism 1600, the backrest assembly 1220 can slide relative to the back support 1100 when the back support 1100 pivots without affecting the user, thereby improving the comfort of use.

[0056] The adjustable chair 100 of the present invention can have a wheelchair structure and thus further include a base frame and at least three wheels. The seat 1500 is mounted on the base frame, and the number of wheels can be, for example, four and mounted on the base frame. For the sake of simplicity, the base frame and wheels are omitted in this invention, but this is not intended to limit the present invention. Furthermore, in other embodiments, the adjustable chair can be a conventional chair and include legs, without limitation.

[0057] See also Figure 3 and Figure 4 , and see also Figure 2 ,in Figure 3 yes Figure 1 A partially enlarged schematic diagram of the adjustable chair 100 of the embodiment, Figure 4 yes Figure 1 A partial cross-sectional view of the adjustment chair 100 along the cutting line 4-4 of the embodiment. Figures 1 to 4 In the embodiment, the number of the first rails 1110 is two, and the two first rails 1110 are symmetrically arranged. Each first rail 1110 includes a rail frame 1111 and an inner pad 1112. The inner pad 1112 is arranged in the rail frame 1111 and forms a guide space. The rail frame 1111 can have a metal body, and the inner pad 1112 can have a groove-shaped plastic body.

[0058] Specifically, the back support 1100 may further include a mounting plate 1120 and a locking plate 1130. The mounting plate 1120 is for mounting the backrest linkage 1300 thereon, and the locking plate 1130 is located above the mounting plate 1120. Two track frames 1111 are located on either side of the mounting plate 1120. Each track frame 1111 is divided into a front half and a rear half by the mounting plate 1120. Each front half has a long groove formed on the side facing the mounting plate 1120 to accommodate each inner pad 1112 therein, and each front half has a locking groove formed on the side facing away from the mounting plate 1120. The two rear halves and the mounting plate 1120 form an assembly space within which other components can be assembled.

[0059] The track frame 1111 is made of metal and may have a metal body. The inner pad 1112 can be locked to the lock plate 1130. It is made of plastic and may have a groove-shaped plastic body and placed in the long groove, so that it can cooperate with the track frame 1111 and produce wear-resistant and self-lubricating effects through heterogeneous configuration. The track frame 1111 may include at least one positioning groove 1111a, and the inner pad 1112 includes at least one positioning rib 1112a, and the at least one positioning rib 1112a protrudes into the at least one positioning groove 1111a. Figure 3 As shown, 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 be three to match the number of positioning grooves 1111a. This allows the inner pad 1112 to be stably combined with the track frame 1111. It should be noted that the track frame in this case refers to a structure that forms a long groove and is used to accommodate the inner pad. It can be manufactured independently as a track frame and then connected to other components through other fixing methods, or it can include other extensions and be used as a side panel or front panel. The above disclosure is not limited to this.

[0060] The back support 1100 may further include two second rails 1140, which are arranged on the setting plate 1120 and symmetrically. Each second rail 1140 may be located in the lower half of the setting plate 1120, and 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 sliding rod 1330.

[0061] The number of sliding components 1210 of the backrest sliding mechanism 1200 is two, and each sliding component 1210 is movably accommodated in the guide space of each inner pad 1112, and each sliding component 1210 has a rod-shaped structure to match the guide space, thereby enabling stable sliding and reducing abnormal noise. Specifically, Figure 2 and Figure 3As shown, each sliding assembly 1210 includes a locking portion 1211 and a sliding portion 1212. The locking portion 1211 and the sliding portion 1212 are connected to form an L-shape. The sliding portion 1212 protrudes into the guide space, and the locking portion 1211 can be locked to the backrest assembly 1220. The backrest assembly 1220 can be used for the user to lean on and support the user's back.

[0062] See also Figure 5 and Figure 6 , and see also Figure 2 ,in Figure 5 Draw Figure 1 A schematic front view of the sliding assembly 1210, the backrest sliding mechanism 1200 and the back support 1100 of the adjustable chair 100 according to the embodiment, Figure 6 Draw Figure 1 Another front view of the sliding assembly 1210, the backrest sliding mechanism 1200 and the back support 1100 of the adjustable chair 100 of the embodiment. Figure 2 、 Figure 5 and Figure 6 As shown, the backrest linkage mechanism 1300 may include a connecting rod 1310, a swing rod 1320, and a first sliding rod 1330. The connecting rod 1310 is pivotally connected to the backrest assembly 1220. The swing rod 1320 is pivotally connected to the back support 1100 at one end and to the connecting rod 1310 at the other end. The swing rod 1320 includes at least two pivot holes 1321. The upper end of the first sliding rod 1330 is pivotally connected to one of the at least two pivot holes 1321. The drive mechanism 1600 is connected to the back support 1100.

[0063] Specifically, the left end of the swing link 1320 is pivotally connected to the mounting plate 1120, allowing it to pivot relative to the mounting plate 1120. The right end of the swing link 1320 is 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. In this way, the connecting rod 1310 can pivot simultaneously relative to the swing link 1320 and the back plate. The at least two pivot holes 1321 of the swing link 1320 are three in number, and the pivot holes 1321 are arranged between the two ends of the swing link 1320. The upper end of the first sliding link 1330 can, for example, be pivotally connected to the leftmost pivot hole 1321, and the lower end of the first sliding link 1330 can be restrained by the two second rails 1140. When the first slide bar 1330 moves along the second track 1140, it causes the swing bar 1320 to swing and, in turn, the connecting bar 1310 to slide the backrest assembly 1220. The upper end of the first slide bar 1330 can be pivoted to various pivot holes 1321, adjusting the range of movement of the backrest assembly 1220 relative to the back frame 1100. In other embodiments, the swing bar and the connecting bar can be integrally formed, with one end of the connecting bar pivoted to the backrest assembly and connected to the slider. The back frame can further include a third track located on the mounting plate, along which the slider slides within a limited position.

[0064] The backrest linkage mechanism 1300 may further include a slide 1340 and a second slide 1350. The slide 1340 is slidably mounted on the second track 1140 and pivotally connected to the first slide 1330. One end of the second slide 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 (not shown) and four pulleys (not shown). Two of the pulleys are located on one side of the seat and accommodated in the second track 1140 therein, and the other two pulleys are located on the other side of the seat and accommodated in the other second track 1140. When the slide 1340 moves within the second track 1140, it can link the first slide 1330. In other embodiments, the backrest linkage mechanism may include any combination of linkages. The back support may include a track and linkage, but may also not include a track, and the present disclosure is not limited thereto.

[0065] like Figure 2 As shown, 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. The actuator 1630 is connected to and drives the push rod 1620. Specifically, the actuator 1630 may be an electric cylinder and 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 to the outward locking groove of the track frame 1111, the lower end protrudes 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.

[0066] Therefore, if Figure 5 and Figure 6 As shown, when the telescopic rod 1631 of the actuator 1630 retracts, it drives the push rod 1620 and the fixed plate 1610, causing the back support 1100 to pivot. At this time, because the second slide bar 1350 is pivotally connected to the seat 1500, the slide 1340 is restrained by the second slide bar 1350 and moves within the second track 1140, driving the first slide bar 1330 downward, causing the swing link 1320 to pivot about its left end, driving the connecting rod 1310 to move the backrest assembly 1220, thereby allowing the slide assembly 1210 to slide within the first track 1110.

[0067] Although the present invention has been disclosed above with reference to the embodiments, they are not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications 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: chair seat; A back support is pivotally mounted on the seat and comprises: A first track having a first guiding direction parallel to the length direction of the back support; and a second track, spaced apart from the first track and having a second guiding direction, the second guiding direction being parallel to the length direction; Back-rest sliding mechanism, including: A sliding assembly is movably disposed on the first track; and a backrest assembly connected to the sliding assembly; a backrest link mechanism connected to the backrest assembly and guided by the second track; and a driving mechanism connected to the back support; The driving mechanism drives the back support to rotate relative to the seat, and the backrest link mechanism moves along the second track and links the sliding assembly to move in the first track, so that the backrest assembly moves relative to the back support.

2. The adjustable chair according to claim 1, wherein: This first track contains: Track frame; and an inner pad, disposed in the track frame; The sliding component has a rod-shaped structure to match the inner pad.

3. The adjustable chair according to claim 2, wherein: The track frame includes at least one positioning groove, and the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove.

4. The adjustable chair according to claim 3, characterized in that: The track frame has a metal body, and the inner pad has a channel-shaped plastic body.

5. The adjustable chair according to claim 1, wherein: The drive mechanism comprises: a fixing plate, one end of which is connected to the back support; a push rod connected to the other end of the fixed plate, and The actuator is connected to and drives the push rod.

6. The adjustable chair according to claim 1, wherein: The back-support linkage mechanism comprises: a connecting rod pivotally connected to the backrest assembly; a swing rod, 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 rod comprising at least two pivot holes; a first sliding rod, wherein an upper end of the first sliding rod is pivotally connected to any one of the at least two pivot holes, and a lower end of the first sliding rod is limited by the second track; a sliding seat, slidably disposed on the second track and pivotally connected to the first sliding rod; and A second sliding rod has one end pivotally connected to the sliding seat and the other end pivotally connected to the seat.

7. An adjustable chair, characterized in that: Include: chair seat; The back support is pivotally mounted on the seat and includes a first track. The first track has a first guide direction parallel to the length direction of the back support, and the first track includes: Track frame; and An inner pad is arranged in the track frame and forms a guide space; Back-rest sliding mechanism, including: A sliding component is movably accommodated in the guide space, and the sliding component has a rod-shaped structure to match the guide space; and a backrest assembly connected to the sliding assembly; a backrest connecting rod mechanism connecting the backrest components; as well as a driving mechanism connected to the back support; The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism drives the sliding component to move in the first track, so that the backrest component moves relative to the back support.

8. The adjustable chair according to claim 7, wherein: The track frame includes at least one positioning groove, and the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove.

9. The adjustable chair according to claim 8, wherein: The track frame has a metal body, and the inner pad has a channel-shaped plastic body.

10. The adjustable chair according to claim 7, wherein: The drive mechanism comprises: a fixing plate, one end of which is connected to the back support; a push rod connected to the other end of the fixing plate; and The actuator is connected to and drives the push rod.

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