Office chair with adjustable armrests

Abstract

The utility model provides an office chair with adjustable armrests, and belongs to the technical field of office chairs. Comprising a seat, a movable seat is fixed to the bottom of the seat, supporting mechanisms are mounted on the two sides of the seat, each supporting mechanism comprises a mounting block, a first adjusting arm, a second adjusting arm and a placing plate, the mounting blocks are fixed to one end of the seat, armrests are arranged above the mounting blocks, and adjusting assemblies are slidably arranged at the tops of the mounting blocks; the adjusting assembly is used for adjusting the height position of the handrail, the first adjusting arm is rotationally installed at the top of the handrail, the second adjusting arm is rotationally installed at the top of the first adjusting arm, and the containing plate is rotationally installed at the top of the second adjusting arm. The placing plate can move along with the movement of the arm of the user, continuous support is provided for the forearm of the user, the support is suitable for different crowds, and the experience feeling of the user is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to office chair technical field relates to an adjustable armrest office chair. BACKGROUND

[0002] Office chair, in daily work and social activities, is to provide convenience for people and equipped with various chairs, specifically, the office chair refers to the back chair that people sit when carrying out desktop work in a sitting position.

[0003] The patent document with the authorized publication number CN221865234U, a chair back replaceable office chair, when the height position of the armrest needs to be adjusted according to actual demand, it only needs to pass through the adjusting assembly, can conveniently adjust the height position of the armrest, thereby facilitating different users to use.

[0004] But the above prior art still has the following shortcomings:

[0005] Although the above prior art can adjust the height of the armrest according to actual demand, realize the support of the arms of different users, but due to the different body of each user, so the distance between the hands of different users is also different, and the distance between the two armrests of the prior art is fixed and cannot be adjusted, so that the arms of part of users still cannot be well supported, and when the user moves the mouse or taps the keyboard, the arm will also move, which will also cause the arm to be separated from the armrest, so that the armrest cannot well support the arm of the user. UTILITY MODEL CONTENTS

[0006] The utility model aims at the deficiency of prior art, proposes an armrest adjustable office chair, which is used to solve the technical problem that the armrest of the above prior art in the background art cannot well support the arms of different users.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] An armrest adjustable office chair, comprising a seat, the seat bottom is fixed with a moving seat, the seat both sides are installed with a support mechanism, the support mechanism comprises:

[0009] The mounting block is fixed at one end of the seat, and the mounting block is provided with an armrest above;

[0010] The adjusting assembly is slidably arranged on the top of the mounting block and is used for adjusting the height position of the armrest;

[0011] An adjusting arm, the adjusting arm having a circular hole, a rotating shaft embedded in the circular hole fixed to the top of the armrest, the adjusting arm being rotatably mounted on the armrest, a bearing sleeved on an outer wall of the rotating shaft, and an annular groove for embedding the bearing on an inner wall of the circular hole;

[0012] A second adjusting arm, the second adjusting arm having a second circular hole, a second rotating shaft embedded in the second circular hole fixed to the top of the first adjusting arm, the second adjusting arm being rotatably mounted on the first adjusting arm, a second bearing being sleeved on the outer wall of the second rotating shaft, and a second annular groove for embedding the second bearing being formed on the inner wall of the second circular hole;

[0013] A placement plate, a rotating shaft three is fixed at the bottom of the placement plate, a rotating groove for the rotating shaft three to be embedded is opened at the top of the adjusting arm two, the placement plate is rotatably installed on the adjusting arm two, a bearing three is sleeved on the outer wall of the rotating shaft three, and an annular groove three is opened on the inner wall of the rotating groove for the bearing three to be embedded.

[0014] Working principle:

[0015] The user can adjust the height of the armrest through the adjustment component according to actual needs to facilitate support for the user's arm. The user leans his forearm on the placement board. With the cooperation of adjustment arm one, adjustment arm two and the placement board, the placement board can move with the movement of the user's arm and provide support for the user's arm.

[0016] The beneficial effects of the utility model are:

[0017] The utility model cooperates with an adjusting arm 1, an adjusting arm 2, a placement plate, a rotating shaft 1, a bearing 1, a rotating shaft 2, a bearing 2, a rotating shaft 3, and a bearing so that the placement plate can move with the movement of the user's arm and provide continuous support to the user's forearm. The utility model is suitable for different groups of people and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a front view of an embodiment of the utility model;

[0020] Figure 3 This is an assembly cross-sectional view of the armrest, the first adjustment arm, the second adjustment arm, and the placement plate of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the assembly of the armrest, the first adjusting arm, the second adjusting arm, and the placement plate of an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the assembly of the adjustment assembly and the mounting block of an embodiment of the utility model;

[0023] Figure 6 is the sectional view of the mounting block of the embodiment of the utility model;

[0024] Figure 7 is the assembly schematic view of the fixed block and the convex block of the embodiment of the utility model;

[0025] Figure 8 is the embodiment of the utility model Figure 5 is the enlarged view of A place in the middle;

[0026] Figure 9 is the structural schematic view of the adjusting rod of the embodiment of the utility model;

[0027] Figure 10 is the assembly sectional view of the mounting block and the L-shaped slider of the embodiment of the utility model.

[0028] Mark 1, seat; 2, mobile seat; 3, mounting block; 4, armrest; 5, adjusting arm one; 6, pivot one; 7, bearing one; 8, adjusting arm two; 9, pivot two; 10, bearing two; 11, placing plate; 12, pivot three; 13, bearing three; 14, support rod; 15, adjusting rod; 16, L-shaped slider; 17, sliding slot; 18, adjusting groove; 19, cavity; 20, pull rod; 21, push piece; 22, opening; 23, fixed block; 24, recess; 25, stop block; 26, hinged seat one; 27, hinged seat two; 28, connecting rod; 29, convex block; 30, annular block; 31, return spring; 32, limiting block; 33, limiting groove; 34, rubber pad; 35, cushion; 36, mounting groove; 37, adjusting block; 38, arc-shaped block one; 39, guide block; 40, vertical slot; 41, extension spring; 42, guide slot; 43, arc-shaped block two; 44, through hole; 45, guide hole. Specific implementation

[0029] The following is the embodiment of the utility model and is further described the technical scheme of the utility model in conjunction with the drawings, but the utility model is not limited to these embodiments.

[0030] As Figures 1-4As shown in FIG. 9, an adjustable armrest office chair comprises a seat 1, a moving seat 2 fixed at the bottom of the seat 1, a support mechanism installed on both sides of the seat 1, the support mechanism comprising a mounting block 3, an adjusting assembly, an adjusting arm one 5, an adjusting arm two 8, and a placing plate 11, the mounting block 3 being fixed at one end of the seat 1, a handrail 4 being arranged above the mounting block 3, the adjusting assembly being slidingly arranged on the top of the mounting block 3 and used for adjusting the height position of the handrail 4, the adjusting arm one 5 being provided with a round hole one, the handrail 4 being fixed with a rotating shaft one 6 embedded in the round hole one at the top, the adjusting arm one 5 being rotatably installed on the handrail 4, the rotating shaft one 6 being sleeved with a bearing one 7, the inner wall of the round hole one being provided with an annular groove one for embedding the bearing one 7, the adjusting arm two 8 being provided with a round hole two, the adjusting arm one 5 being fixed with a rotating shaft two 9 embedded in the round hole two at the top, the adjusting arm two 8 being rotatably installed on the adjusting arm one 5, the rotating shaft two 9 being sleeved with a bearing two 10, the inner wall of the round hole two being provided with an annular groove two for embedding the bearing two 10, the placing plate 11 being fixed with a rotating shaft three 12 at the bottom, the adjusting arm two 8 being provided with a rotating groove at the top for embedding the rotating shaft three 12, the placing plate 11 being rotatably installed on the adjusting arm two 8, the rotating shaft three 12 being sleeved with a bearing three 14, the inner wall of the rotating groove being provided with an annular groove three for embedding the bearing three 14, the user leans the forearm on the placing plate 11, the placing plate 11 can move with the arm movement of the user and provide support for the arm of the user under the cooperation of the adjusting arm one 5, the adjusting arm two 8 and the placing plate 11, the placing plate 11 is an arc plate, the inner wall of the placing plate 11 is fixed with a rubber pad 34, and the seat 1 is fixed with a cushion 35.

[0031] As Figures 5-10The adjusting member 14 is provided with an L-shaped slide block 16 at its bottom, and the mounting block 3 is provided with a slide groove 17 for embedding the two L-shaped slide blocks 16. The cross section of the slide groove 17 is L-shaped, and the L-shaped slide block 16 moves along the slide groove 17. The top of the supporting rod 14 is provided with an adjusting groove 18, and the lower end of the adjusting rod 15 is slidably arranged in the adjusting groove 18. The armrest 4 is fixed to the top of the adjusting rod 15 and is located outside the adjusting groove 18. The bottom of the L-shaped slide block 16 is provided with a mounting groove 36, and an adjusting block 37 is embedded in the mounting groove 36. The lower end of the adjusting block 37 has an arc block 38, and the two ends of the adjusting block 37 have guide blocks 39. The inner wall of the mounting groove 36 is provided with a vertical groove 40 for embedding the guide block 39. A telescopic spring 41 is fixed between the top of the guide block 39 and the inner top wall of the vertical groove 40. A guide groove 42 is provided for the arc block 1 38 to be embedded, and a plurality of arc blocks 2 43 distributed at equal intervals are fixed on the bottom wall of the guide groove 42. When the support rod 14 is moved, the support rod 14 drives the L-shaped slider 16 to move synchronously, and the L-shaped slider 16 drives the arc block 1 38 to move synchronously. The arc block 1 38 cooperates with the arc block 2 43, so that the arc block 1 38 drives the guide block 39 to move along the vertical groove 40, and the guide block 39 compresses the telescopic spring 41. The telescopic spring 41 is compressed and has a certain elastic potential energy until the arc block 1 38 is embedded in the installation groove 36. When the arc block 1 38 moves between the two arc blocks 2 43, under the action of the telescopic spring 41, the telescopic spring 41 drives the guide block 39 to move along the vertical groove 40, and the guide block 39 drives the arc block 1 38 to move away from the installation groove 36 through the adjusting block 37 until the arc block 1 38 is embedded between the two adjacent arc blocks 2 43.

[0032] like Figures 5-10As shown, the adjusting rod 15 has a cavity 19, a pull rod 20 is slidably arranged in the cavity 19, a push piece 21 is fixed at one end of the pull rod 20, the adjusting rod 15 is provided with an opening 22 at one end outside the adjusting groove 18 for the push piece 21 to pass through, the adjusting rod 15 is provided with two symmetrical through holes 44, a fixed block 23 is slidably arranged in the through hole 44, recesses 24 are formed in the inner walls of the two sides of the adjusting groove 18, a plurality of equally spaced stop blocks 25 are fixed in each recess 24, the fixed block 23 extends into the recess 24 and is embedded between the adjacent two stop blocks 25, a hinge seat one 26 is fixed at one end of the fixed block 23 extending into the cavity 19, two hinge seat twos 27 are fixed on the outer wall of the pull rod 20, a connecting rod 28 is hingedly connected at one end of the hinge seat one 26, the other end of the connecting rod 28 is hingedly connected with the corresponding hinge seat two 27, a protrusion 29 is fixed on the inner wall of the cavity 19, the protrusion 29 is provided with a guide hole 45 for the pull rod 20 to pass through, an annular block 30 is fixedly sleeved on the outer wall of the pull rod 20, a reset spring 31 is sleeved on the pull rod 20, the two ends of the reset spring 31 are connected with the lower end of the protrusion 29 and the upper end of the annular block 30 respectively, limit blocks 32 are fixed at the two ends of the fixed block 23, limit grooves 33 are formed in the inner wall of the cavity 19 for the limit blocks 32 to be embedded, the push piece 21 is pulled upwards, the push piece 21 drives the pull rod 20 to move upwards, the pull rod 20 drives the annular block 30 to move synchronously, the annular block 30 compresses the reset spring 31, the reset spring 31 is compressed and has a certain elastic potential energy, the pull rod 20 drives the fixed block 23 to move towards the pull rod 20 through the hinge seat two 27, the connecting rod 28 and the hinge seat one 26, the fixed block 23 drives the limit block 32 to move along the limit groove 33, until the fixed block 23 is separated from the adjacent two stop blocks 25, the adjusting rod 15 is pulled upwards to the required height, the push piece 21 is released, under the action of the reset spring 31, the reset spring 31 drives the pull rod 20 to move downwards through the annular block 30, the pull rod 20 drives the fixed block 23 to move away from the pull rod 20 through the hinge seat two 27, the connecting rod 28 and the hinge seat one 26, until one end of the fixed block 23 is embedded between the adjacent two stop blocks 25.

[0033] The specific operation mode of the utility model is as follows:

[0034] The user first moves the supporting rod 14, the supporting rod 14 drives the L-shaped slider 16 to move along the sliding groove 17 to the required position, then pulls the tab 21 upward, the tab 21 drives the pull rod 20 to move upward, the pull rod 20 drives the ring-shaped block 30 to move synchronously, the ring-shaped block 30 compresses the reset spring 31, the reset spring 31 is compressed and has a certain elastic potential energy, the pull rod 20 drives the fixed block 23 to move toward the direction close to the pull rod 20 through the second hinged seat 27, the connecting rod 28 and the first hinged seat 26, the fixed block 23 drives the limiting block 32 to move along the limiting groove 33, until the fixed block 23 is separated from the adjacent two blocks 25, the adjusting rod 15 is pulled upward to the required height, the tab 21 is released, under the action of the reset spring 31, the reset spring 31 drives the pull rod 20 to move downward through the ring-shaped block 30, the pull rod 20 drives the fixed block 23 to move away from the pull rod 20 through the second hinged seat 27, the connecting rod 28 and the first hinged seat 26, until one end of the fixed block 23 is embedded between the adjacent two blocks 25, finally the user leans the small arm on the placing plate 11, under the cooperation of the adjusting arm 5, the adjusting arm 8 and the placing plate 11, the placing plate 11 can move with the movement of the arm of the user and provide support for the arm of the user.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. An adjustable office chair with armrests, comprising a seat (1) with a mobile base (2) fixed at the bottom, and a support mechanism installed on both sides of the seat (1), characterized in that, The support mechanism comprises: a mounting block (3) fixed at one end of a seat (1), a handrail (4) arranged above the mounting block (3); an adjusting assembly arranged on the top of the mounting block (3) and used for adjusting the height position of the handrail (4); an adjusting arm (5) provided with a round hole (1), a rotating shaft (6) fixed on the top of the handrail (4) and embedded in the round hole (1), the adjusting arm (5) being rotatably arranged on the handrail (4), a bearing (7) sleeved on the outer wall of the rotating shaft (6), and an annular groove (1) formed in the inner wall of the round hole (1) and embedded with the bearing (7); an adjusting arm (8) provided with a round hole (2), a rotating shaft (9) fixed on the top of the adjusting arm (5) and embedded in the round hole (2), the adjusting arm (8) being rotatably arranged on the adjusting arm (5), a bearing (10) sleeved on the outer wall of the rotating shaft (9), and an annular groove (2) formed in the inner wall of the round hole (2) and embedded with the bearing (10); a placing plate (11) fixed with a rotating shaft (12) at the bottom, the top of the adjusting arm (8) being provided with a rotating groove embedded with the rotating shaft (12), the placing plate (11) being rotatably arranged on the adjusting arm (8), a bearing (13) sleeved on the outer wall of the rotating shaft (12), and an annular groove (3) formed in the inner wall of the rotating groove and embedded with the bearing (13).

2. An adjustable office chair according to claim 1, wherein, The adjusting assembly comprises a support rod (14) and an adjusting rod (15), the bottom of the support rod (14) being fixed with two L-shaped sliding blocks (16), the mounting block (3) being provided with two sliding grooves (17) embedded with the corresponding two L-shaped sliding blocks (16), the top of the support rod (14) being provided with an adjusting groove (18), the lower end of the adjusting rod (15) being slidably arranged in the adjusting groove (18), and the handrail (4) being fixed on the top of the adjusting rod (15) and located outside the adjusting groove (18).

3. An adjustable office chair according to claim 2, wherein, The adjusting rod (15) has a cavity (19) therein, a pull rod (20) being slidably arranged in the cavity (19), a tab (21) being fixed on one end of the pull rod (20), an opening (22) being formed in one end of the adjusting rod (15) outside the adjusting groove (18) and allowing the tab (21) to pass through, two symmetrical through holes (44) being formed in the adjusting rod (15), a fixed block (23) being slidably embedded in the through holes (44), a recess (24) being formed in the inner wall of the adjusting groove (18), a plurality of equally spaced stop blocks (25) being fixed in the recess (24), one end of the fixed block (23) extending into the recess (24) and embedded between two adjacent stop blocks (25), one end of the fixed block (23) extending into the cavity (19) and fixed with a hinge seat (26), two hinge seats (27) being fixed on the outer wall of the pull rod (20), one end of the hinge seat (26) being hingedly connected with a connecting rod (28), and the other end of the connecting rod (28) being hingedly connected with the corresponding hinge seat (27).

4. An adjustable office chair according to claim 3, wherein, The inner wall of the cavity (19) is fixed with a protrusion (29), the protrusion (29) is provided with a guide hole (45) for the pull rod (20) to pass through, the outer wall of the pull rod (20) is sleeved with an annular block (30), the pull rod (20) is sleeved with a reset spring (31), and the both ends of the reset spring (31) are connected with the lower end of the protrusion (29) and the upper end of the annular block (30) respectively.

5. An adjustable office chair according to claim 3, wherein, The both ends of the fixed block (23) are fixed with a limiting block (32), and the inner wall of the cavity (19) is provided with a limiting groove (33) for the limiting block (32) to be embedded.

6. An adjustable office chair having an armrest according to claim 1, wherein, The placing plate (11) is an arc-shaped plate, the inner wall of the placing plate (11) is fixed with a rubber pad (34), and the seat (1) is fixed with a seat cushion (35).

7. An adjustable office chair having an armrest as claimed in claim 2, wherein, The bottom of the L-shaped sliding block (16) is provided with a mounting groove (36), the mounting groove (36) is embedded with an adjusting block (37), the lower end of the adjusting block (37) is provided with an arc-shaped block (38), the both ends of the adjusting block (37) are provided with guide blocks (39), the inner wall of the mounting groove (36) is provided with a vertical groove (40) for the guide blocks (39) to be embedded, the top of the guide blocks (39) and the inner top wall of the vertical groove (40) are fixed with telescopic springs (41), the inner bottom wall of the sliding groove (17) is provided with a guide groove (42) for the arc-shaped block (38) to be embedded, the inner bottom wall of the guide groove (42) is fixed with a plurality of arc-shaped blocks (43) which are distributed at equal intervals, and the arc-shaped block (38) is embedded between the adjacent two arc-shaped blocks (43).

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