Adjustable seat

Abstract

The utility model relates to an adjustable chair which comprises a chair seat, a chair frame and a chair back, the chair seat and the chair back are arranged on the chair frame, and the adjustable chair is characterized in that extension rods extending backwards are arranged at the upper ends of the left side and the right side of the chair frame, sliding rods are arranged on the two sides of the chair back, the sliding rods are arranged on the extension rods, and the sliding rods are matched with the extension rods in a sliding mode. A plurality of locking holes are formed in the extension rod or the sliding rod in the sliding direction of the sliding rod, the chair further comprises locking pieces, when the locking pieces are separated from the locking holes, the sliding rod slides outside the extension rod so as to adjust the front-back position of the chair back, and when the locking pieces are located in the locking holes, the sliding rod is locked. By the adoption of the technical scheme, the sitting depth of the adjustable seat is adjusted by adjusting the front-back position of the seat back, the adjustable seat meets different users, the adjusting structure is simple, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an adjustable seat. Background Art

[0002] As children grow, their height will continue to increase with age. Due to the change in height, they have different requirements for the seat depth and height at different ages; therefore, a fixed chair cannot meet the use requirements of children at different ages.

[0003] In the prior art, the child seats with adjustable seat depth and seat height are generally realized by using lifting gas rods, which have a relatively complex structure and high cost.

[0004] However, for seats made of non-metallic materials such as solid wood chairs, lifting gas rods are no longer applicable. Summary of the invention

[0005] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides an adjustable seat, which can adjust the seat depth by adjusting the front and rear position of the chair back to meet the needs of different user groups, and the adjustment structure is simple and easy to operate.

[0006] The technical solution of the utility model is as follows: an adjustable chair, comprising a seat, a chair frame and a chair back, wherein the seat and the chair back are arranged on the chair frame, and the upper ends of the left and right sides of the chair frame are provided with extension rods extending rearward, and sliding rods are provided on both sides of the chair back, and the sliding rods are arranged on the extension rods, and the sliding rods and the extension rods are slidably matched, and a plurality of locking holes are provided on the extension rods or on the sliding rods along the sliding direction of the sliding rods, and a locking piece is also included, and when the locking piece is disengaged from the locking hole, the sliding rod slides outside the extension rod to adjust the front and rear position of the chair back, and when the locking piece is located in the locking hole, the sliding rod is locked.

[0007] By adopting the above technical solution, the seat depth can be adjusted by adjusting the front and rear position of the chair back. The adjustment method is simple, quick and low-cost. The locking piece is disengaged from the locking hole. At this time, the chair back can be driven to slide back and forth on the extension rod to adjust the seat depth. After the adjustment is completed, the locking piece is inserted into the locking hole to lock it. At this time, the chair back cannot be slid and is fixed.

[0008] Further configuration of the utility model: the sliding rod is provided with a chamber with an opening at the bottom end, the locking piece is movably arranged in the chamber, the locking piece includes a locking part, a hinged part and a driving part, the hinged part is connected to the inner wall of the chamber through a hinged shaft, the locking part is provided with a locking shaft, a notch is provided on the chamber corresponding to the position of the locking shaft, the locking shaft passes through the notch and is inserted into the locking hole, a reset spring is provided between the driving part and the top wall of the chamber, the driving part is pressed to compress the reset spring so that the locking shaft is separated from the locking rod, thereby realizing the sliding of the sliding rod.

[0009] With the above-mentioned further arrangement, when the seat depth needs to be adjusted, the driving part is pressed into the cavity, the locking part will move out of the cavity, and the locking rod will disengage from the locking hole. At this time, the chair back can be operated to slide. After releasing the driving part, the reset spring resets it, the driving part moves out of the cavity, the locking part moves into the cavity, and the locking rod is reinserted into the currently corresponding locking hole to achieve locking. The operating structure is simple, convenient and fast, and the structure is stable.

[0010] The utility model is further configured as follows: a sliding groove is provided on the side wall of the sliding rod, and a limiting shaft is provided on the extension rod. When the sliding rod slides outside the extension rod, the limiting shaft slides relative to the sliding groove.

[0011] By further configuring as described above, the cooperation between the slide groove and the limit shaft can limit the sliding distance of the chair back, thereby preventing the chair back from sliding excessively and coming off the chair frame.

[0012] The utility model is further configured as follows: a positioning block is provided on the locking portion on the outside of the locking shaft, a positioning boss is provided on the inner wall of the chamber and extends toward the notch, and the positioning boss is located above the positioning block to limit the movable distance of the locking portion.

[0013] By further configuring as described above, the locking portion can be limited. When resetting, the positioning block touches the positioning boss, indicating that the position is reset to the correct position. At this time, the locking shaft is located in the locking hole to prevent the locking portion from being over-reset, causing the driving portion to be too exposed in the chamber and causing the reset spring to fall off.

[0014] The utility model is further configured as follows: a positioning groove is provided on the top wall of the chamber, a positioning shaft is correspondingly provided on the driving part, the upper end of the reset spring is located in the positioning groove, and the lower end is sleeved on the positioning shaft.

[0015] By adopting the above-mentioned further configuration, the structure of the reset spring is stabilized, the driving part is automatically reset better, and the reset spring is prevented from being separated.

[0016] The utility model is further configured as follows: the chair frame includes two symmetrically arranged chair legs, each of which includes a front leg and a rear leg, the extension rod is located at the upper end of the front leg, and the front leg and the rear leg are each provided with a plurality of first mounting holes along the height direction, and second mounting holes and adjustment slots are correspondingly provided on both sides of the seat along its length direction. After the position of the seat is adjusted in the height direction, the fastener is inserted into the second mounting hole, the adjustment slot, and screwed into the corresponding first mounting hole to achieve the installation and fixation of the seat.

[0017] By adopting the above-mentioned further arrangement, the height of the seat can be adjusted, and the height can be adjusted to suit the user group to meet the needs of different user groups. The setting of the adjustment slot is convenient for installation, and the fastener can move in the adjustment slot, and the precision requirement is low.

[0018] The utility model is further configured as follows: the chair seat comprises a mounting frame and a seat plate arranged on the mounting frame, and the second mounting hole and the adjusting long slot are arranged on the side wall of the mounting frame.

[0019] By adopting the above further arrangement, the chair seat has a firm structure and is easy to install.

[0020] The utility model is further configured as follows: it also includes a foot pedal, which is located between the two front legs, and a plurality of third mounting holes are provided on the two front legs along their height direction, and fourth mounting holes are correspondingly provided on both sides of the foot pedal. After the foot pedal is adjusted to a preset position along the height direction, screws are used to pass through the fourth mounting holes and screw into the third mounting holes to fix the foot pedal on the front legs.

[0021] With the above-mentioned further configuration, it is more comfortable, the feet can be placed on the footrest, and the height of the footrest can be adjusted to meet the needs of people of different heights.

[0022] The utility model is further configured as follows: the front legs and the rear legs are connected by a connecting rod, and a plurality of bearing rods are connected between the two connecting rods.

[0023] By adopting the above-mentioned further configuration, the seat structure is made more solid and the storage space is increased, and items can be placed on the load-bearing rod.

[0024] The utility model is further configured as follows: casters are arranged at the bottoms of the two connecting rods.

[0025] The above-mentioned further arrangement facilitates the movement of the seat, saving time and effort during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional view of a specific embodiment of the utility model;

[0028] Figure 3 for Figure 2 A magnified view of part A;

[0029] Figure 4 It is a schematic diagram of a chair back of a specific embodiment of the utility model;

[0030] Figure 5It is a schematic diagram of a locking member of a specific embodiment of the utility model;

[0031] Figure 6 It is a schematic diagram of a limiting shaft of a specific embodiment of the utility model;

[0032] Figure 7 It is a schematic diagram of a chair frame and a footrest of a specific embodiment of the utility model;

[0033] Figure 8 It is a schematic diagram of a footrest according to a specific embodiment of the utility model;

[0034] Fig. 9 It is a schematic diagram of a chair frame of a specific embodiment of the utility model;

[0035] Fig.10 It is a schematic diagram of a chair seat according to a specific embodiment of the utility model.

[0036] 1. Seat; 11. Second mounting hole; 12. Adjustment slot; 13. Mounting frame; 14. Seat plate; 2. Chair frame; 21. Extension rod; 211. Limiting shaft; 22. Front leg; 221. Third mounting hole; 23. Rear leg; 24. First mounting hole; 3. Chair back; 31. Slide rod; 311. Chamber; 3111. Positioning boss; 3112. Positioning slot; 312. Slide slot; 4. Locking hole; 5. Locking piece; 51. Locking part; 511. Locking shaft; 512. Positioning block; 52. Articulated part; 521. Articulated shaft; 53. Driving part; 531. Return spring; 532. Positioning shaft; 6. Footrest; 61. Fourth mounting hole; 7. Connecting rod; 71. Load-bearing rod; 72. Caster. DETAILED DESCRIPTION

[0037] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0040] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] like Figure 1-10 As shown, an adjustable chair comprises a seat 1, a chair frame 2 and a chair back 3, wherein the seat 1 and the chair back 3 are arranged on the chair frame 2, and the upper ends of the left and right sides of the chair frame 2 are provided with extension rods 21 extending to the rear side, and the two sides of the chair back 3 are provided with slide rods 31, and the slide rods 31 are arranged on the extension rods 21, and the slide rods 31 are slidably matched with the extension rods 21, and a plurality of locking holes 4 are arranged on the extension rods 21 or on the slide rods 31 along the sliding direction of the slide rods 31, and also includes a locking member 5, and the locking member 5 is disengaged from the lock When the locking member 5 is in the locking hole 4, the slide bar 31 slides outside the extension rod 21 to adjust the front and rear position of the chair back 3. When the locking member 5 is in the locking hole 4, the slide bar 31 is locked. By adjusting the front and rear position of the chair back 3, the seat depth can be adjusted. The adjustment method is simple, fast, and low in cost. The locking member 5 is disengaged from the locking hole 4. At this time, the chair back 3 can be driven to slide forward and backward on the extension rod 21 to adjust the seat depth. After the adjustment is completed, the locking member 5 is inserted into the locking hole 4 to lock the seat back 3. At this time, the chair back 3 cannot be slid and the chair back 3 is fixed. The slide bar 31 can be sleeved outside the extension rod 21, or the slide bar 31 can be located inside the extension rod 21. The locking member 5 can be set on the slide bar 31 or on the extension rod 21, and can be hinged or detachably connected. For example, the locking member 5 can be set by screws or bolts, and the slide bar 31 and the extension rod 21 are locked by the locking member 5, or the structure of marbles and springs can be used for locking. The seat of the utility model has a simple structure and low cost, and is suitable for use with non-metallic seats.

[0042] In this embodiment, the specific structure between the slide bar 31 and the extension rod 21 is that the slide bar 31 is provided with a chamber 311 with a bottom opening, the locking member 5 is movably arranged in the chamber 311, the locking member 5 includes a locking portion 51, a hinge portion 52 and a driving portion 53, the hinge portion 52 is connected to the inner wall of the chamber 311 through a hinge shaft 521, the locking portion 51 is provided with a locking shaft 511, the chamber 311 is provided with a notch corresponding to the position of the locking shaft 511, the locking shaft 511 is inserted into the locking hole 4 through the notch, and a reset spring 5 is provided between the driving portion 53 and the top wall of the chamber 311. 31, press the driving part 53 to compress the return spring 531 to make the locking shaft 511 disengage from the locking rod, so that the sliding of the slide bar 31 is realized. When the seat depth needs to be adjusted, press the driving part 53 into the cavity 311, the locking part 51 will move out of the cavity 311, and the locking rod will disengage from the locking hole 4. At this time, the chair back 3 can be operated to slide. After releasing the driving part 53, the return spring 531 resets it, the driving part 53 moves out of the cavity 311, the locking part 51 moves into the cavity 311, and the locking rod is reinserted into the currently corresponding locking hole 4 to realize locking. The operation structure is simple, convenient and fast, and the structure is stable.

[0043] A sliding groove 312 is provided on the side wall of the sliding rod 31, and a limiting shaft 211 is provided on the extension rod 21. When the sliding rod 31 slides outside the extension rod 21, the limiting shaft 211 slides relative to the sliding groove 312. The cooperation between the sliding groove 312 and the limiting shaft 211 can limit the sliding distance of the chair back 3 to prevent it from sliding excessively and the chair back 3 from detaching from the chair frame 2. A baffle is provided outside the sliding groove, which is more beautiful and prevents the sliding groove from being exposed.

[0044] A positioning block 512 is provided on the locking portion 51 at the outside of the locking shaft 511, and a positioning boss 3111 extending in the direction of the notch is provided on the inner wall of the chamber 311. The positioning boss 3111 is located above the positioning block 512 to limit the movable distance of the locking portion 51, so as to limit the locking portion 51. When resetting, the positioning block 512 touches the positioning boss 3111, indicating that it is reset to the position. At this time, the locking shaft 511 is located in the locking hole 4, which prevents the locking portion 51 from over-resetting, causing the driving portion 53 to be too exposed in the chamber 311, resulting in the falling off of the reset spring 531.

[0045] A positioning groove 3112 is provided on the top wall of the chamber 311, and a positioning shaft 532 is correspondingly provided on the driving part 53. The upper end of the reset spring 531 is located in the positioning groove 3112, and the lower end is sleeved on the positioning shaft 532, so that the reset spring 531 has a stable structure, can better automatically reset the driving part 53, and prevent the reset spring 531 from detaching.

[0046] The chair frame 2 includes two symmetrically arranged chair legs, both of which include a front leg 22 and a rear leg 23. The extension rod 21 is located at the upper end of the front leg 22. The front leg 22 and the rear leg 23 are each provided with a plurality of first mounting holes 24 along the height direction. The two sides of the seat 1 are correspondingly provided with second mounting holes 11 and an adjusting slot 12 along its length direction. After the seat 1 is adjusted in the height direction, the fastener is inserted into the second mounting hole 11 and the adjusting slot 12, and screwed into the corresponding first mounting hole 24 to achieve the installation and fixation of the seat 1. The fastener is set by a screw, and the mounting hole is a threaded hole. The height of the seat 1 can be adjusted according to the user group to meet the needs of different user groups. The setting of the adjusting slot 12 is convenient for installation, and the fastener can move in the adjusting slot 12, and the precision requirement is low. The seat 1 includes a mounting frame 13 and a seat plate 14 arranged on the mounting frame 13. The second mounting hole 11 and the adjusting slot 12 are arranged on the side wall of the mounting frame 13. The seat 1 has a firm structure and is easy to install.

[0047] It also includes a footrest 6 plate, which is located between the two front legs 22. A plurality of third mounting holes 221 are provided on the two front legs 22 along their height direction, and fourth mounting holes 61 are correspondingly provided on both sides of the footrest 6 plate. After the footrest 6 is adjusted to a preset position along the height direction, screws are passed through the fourth mounting holes 61 and screwed into the third mounting holes 221 to fix the footrest 6 on the front legs 22, which is more comfortable and the feet can be placed on the footrest 6. The height of the footrest 6 can be adjusted to meet the usage needs of people of different heights.

[0048] The front legs 22 and the rear legs 23 are connected by a connecting rod 7, and a plurality of bearing rods 71 ​​are connected between the two connecting rods 7, so that the seat structure is more solid and the storage space can be increased, and items can be placed on the bearing rods 71. Casters 72 are provided at the bottom of the two connecting rods 7 to facilitate the movement of the seat, saving time and effort when carrying, and when a child sits on the seat, it is convenient for adults to drag the seat.

[0049] Specifically, as children age, their height and weight will also increase. When the child's height grows to a point where the current seat no longer meets their usage requirements, adults can adjust the seat height and the position of the seat back 3 according to the child's specific height, so that the seat adapts to the child's current height. In the seat of this embodiment, the seat 1 can only be adjusted in height, and the seat back 3 can be adjusted in front and back position. Up and down adjustment means adjusting the seat height of the seat 1, and front and back adjustment means adjusting the seat depth of the seat 1.

Claims

1. An adjustable chair, comprising a seat (1), a chair frame (2) and a chair back (3), wherein the seat (1) and the chair back (3) are arranged on the chair frame (2), characterized in that: The upper ends of the left and right sides of the chair frame (2) are provided with extension rods (21) extending backward, and the two sides of the chair back (3) are provided with sliding rods (31), which are arranged on the extension rods (21). The sliding rods (31) and the extension rods (21) are slidably matched, and a plurality of locking holes (4) are provided on the extension rod (21) or on the sliding rod (31) along the sliding direction of the sliding rod (31), and also include a locking member (5). When the locking member (5) is disengaged from the locking hole (4), the sliding rod (31) slides outside the extension rod (21) to adjust the front and rear position of the chair back (3). When the locking member (5) is located in the locking hole (4), the sliding rod (31) is locked, and a chamber (311) with a bottom opening is provided on the sliding rod (31). The locking member (5) is movably arranged in the chamber (311), and the locking member (5) comprises a locking portion (51), a hinge portion (52) and a driving portion (53); the hinge portion (52) is connected to the inner wall of the chamber (311) via a hinge shaft (521); a locking shaft (511) is provided on the locking portion (51); a notch is provided on the chamber (311) at a position corresponding to the locking shaft (511); the locking shaft (511) passes through the notch and is inserted into the locking hole (4); a return spring (531) is provided between the driving portion (53) and the top wall of the chamber (311); the return spring (531) is compressed by pressing the driving portion (53) so that the locking shaft (511) is separated from the locking rod, thereby realizing the sliding of the sliding rod (31).

2. The adjustable seat according to claim 1, characterized in that A sliding groove (312) is provided on the side wall of the sliding rod (31), and a limiting shaft (211) is provided on the extension rod (21). When the sliding rod (31) slides outside the extension rod (21), the limiting shaft (211) slides relative to the sliding groove (312).

3. The adjustable seat according to claim 1 or 2, characterized in that: A positioning block (512) is provided on the locking portion (51) on the outside of the locking shaft (511), and a positioning boss (3111) extending in the direction of the notch is provided on the inner side wall of the chamber (311), wherein the positioning boss (3111) is located above the positioning block (512) to limit the movable distance of the locking portion (51).

4. The adjustable seat according to claim 3, characterized in that A positioning groove (3112) is provided on the top wall of the chamber (311), and a positioning shaft (532) is correspondingly provided on the driving portion (53); the upper end of the return spring (531) is located in the positioning groove (3112), and the lower end is sleeved on the positioning shaft (532).

5. The adjustable seat according to claim 1 or 2, characterized in that: The chair frame (2) comprises two symmetrically arranged chair legs, each of which comprises a front leg (22) and a rear leg (23); the extension rod (21) is located at the upper end of the front leg (22); the front leg (22) and the rear leg (23) are each provided with a plurality of first mounting holes (24) along the height direction; second mounting holes (11) and an adjusting slot (12) are correspondingly provided on both sides of the seat (1) along its length direction; after the position of the seat (1) is adjusted in the height direction, the fastener is inserted into the second mounting hole (11) and the adjusting slot (12), and then screwed into the corresponding first mounting hole (24) to achieve installation and fixation of the seat (1).

6. The adjustable seat according to claim 5, characterized in that The chair seat (1) comprises a mounting frame (13) and a seat plate (14) arranged on the mounting frame (13); the second mounting hole (11) and the adjusting long slot (12) are arranged on a side wall of the mounting frame (13).

7. The adjustable seat according to claim 5, characterized in that The footrest (6) is also provided, wherein the footrest (6) is located between the two front legs (22). The two front legs (22) are provided with a plurality of third mounting holes (221) along their height direction. Fourth mounting holes (61) are provided correspondingly on both sides of the footrest (6). After the footrest (6) is adjusted to a preset position along the height direction, screws are passed through the fourth mounting holes (61) and screwed into the third mounting holes (221) to fix the footrest (6) on the front legs (22).

8. The adjustable seat according to claim 5, characterized in that The front legs (22) and the rear legs (23) are connected via a connecting rod (7), and a plurality of bearing rods (71) are connected between the two connecting rods (7).

9. The adjustable seat according to claim 8, characterized in that Casters (72) are provided at the bottoms of the two connecting rods (7).

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