Office chair backrest elastic inclination adjustment device

Abstract

The utility model relates to office chair technical field provides an office chair chair back elasticity inclination adjustment device, including the cushion, the office chair chair back elasticity inclination adjustment device still includes: the backrest, is located one side at the cushion, rotates the module, is located one side at the cushion for adjusting the rotation angle of backrest, two support rods are installed respectively in both sides of the cushion, two support modules are installed respectively in the support rod, can do linear motion in vertical direction, are used for supporting the elbow of user, in the utility model, utilize the effect that the rotation module cooperates spring one makes backrest always have the tendency of turning over to the front, is convenient for user to adjust the inclination angle of backrest, need not manual support auxiliary, utilize the support module to adjust the height of support plate simultaneously, the elbow of user in the state of office for a long time is assisted and supported, avoids appearing the phenomenon of joint fatigue.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to an office chair back elastic tilt adjustment device. Background Technology

[0002] Office chairs refer to various chairs provided for convenience in daily work and social activities. Office professionals categorize office chairs into a narrow and a broad sense. In a narrow sense, an office chair refers to a chair with a backrest used for desk work while seated. In a broad sense, an office chair encompasses all chairs used in offices.

[0003] In the prior art, such as Chinese Patent No. CN223429339U, an elastic tilt adjustment device for an office chair back includes a chair seat. A groove is formed on the right side of the chair seat, and a chair back is rotatably connected within the groove. Cavities are formed on both sides of the groove on the right side of the chair seat. A rotating shaft is fixedly installed at the bottom of the chair back within the groove. A ratchet is installed on the outer ring of the rotating shaft within the cavity. A pawl is rotatably connected to the top inner wall of the cavity. A pull plate is welded to the top of the pawl, penetrating and extending to the upper part of the chair seat. An installation frame is installed inside the chair back, and a movable plate and a flexible plate are installed inside the installation frame. Multiple sets of springs are installed between the movable plate and the flexible plate. This invention, by setting ratchet, pawl, and pull plate, can achieve the purpose of adjusting the angle of the chair back. By setting threaded rod, movable plate, springs, and flexible plate, it can achieve the purpose of adjusting the elasticity of the chair back, allowing the chair back to fit against the office worker's waist, improving the comfort of using the office chair back.

[0004] While the above solution has the advantages mentioned above, its disadvantages are that the backrest tilt angle adjustment requires manual assistance, making it difficult for users to quickly find the most comfortable angle. Furthermore, the design lacks elbow support, which can easily lead to joint fatigue during long hours of office work. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that the backrest is not easy to quickly locate the most comfortable angle, and at the same time, to solve the problem of the lack of elbow support design.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an office chair back elastic tilt adjustment device: including a seat cushion, the office chair back elastic tilt adjustment device further includes: The backrest is located on one side of the seat cushion; A rotating module, located on one side of the seat cushion, is used to adjust the rotation angle of the backrest; Two support rods are respectively installed on both sides of the seat cushion; Two support modules are installed inside the support rod and can move linearly in the vertical direction to support the user's elbows.

[0007] In a preferred embodiment, the rotating module includes: A rotating shaft is installed on one side of the seat cushion; Spring one is sleeved on the rotating shaft; One end of the spring is connected to one side of the seat cushion.

[0008] The technical effect of adopting the above-mentioned further solution is that the spring drives the rotating sleeve to automatically flip forward.

[0009] In a preferred embodiment, the rotating module further includes: A rotating sleeve is fitted onto the spring, and an auxiliary sleeve is installed on one side of the rotating sleeve. Multiple positioning holes are provided on one side of the auxiliary sleeve; The other end of the spring is connected to one side of the inner wall of the rotating sleeve, and the rotating sleeve is fixedly connected to the backrest.

[0010] The technical effect of adopting the above-mentioned further solution is that the forward flipping action of the rotating sleeve drives the backrest to move to the same side.

[0011] In a preferred embodiment, the rotating module further includes: An inner cavity is formed inside one side of the seat cushion, and a plurality of through holes are formed on one side of the inner wall of the inner cavity; The T-shaped pull column is embedded in the inner cavity; The positions of the plurality of through holes correspond to the positions of the plurality of positioning holes, and one end of the T-shaped pull post is located outside the seat cushion.

[0012] The technical effect of adopting the above-mentioned further solution is that the movement of multiple positioning columns is controlled by the T-shaped pull column.

[0013] In a preferred embodiment, the rotating module further includes: A connecting plate is installed on one side of the T-shaped pull column, and multiple positioning columns are installed on one side of the connecting plate; Spring 2 is sleeved on the T-shaped pull column; The multiple positioning pins can be inserted into the multiple positioning holes through the multiple through holes, and the two ends of the second spring are respectively connected to one side of the inner wall of the inner cavity and one side of the connecting plate.

[0014] The technical effect of adopting the above-mentioned further solution is that the flipping angle of the backrest is controlled by using multiple positioning posts that pass through multiple through holes and are embedded in multiple positioning holes.

[0015] In a preferred embodiment, the support module includes: Multiple recessed holes are respectively installed on both sides of the inner wall of the support rod; A connecting column is embedded in the support rod. A displacement plate is installed on the top of the connecting column, a fixing block is installed on the bottom of the connecting column, and two springs are installed on the top of the fixing block. Support plate, installed on the displacement plate; The displacement plate is located outside the support rod, the fixing block is located inside the support rod, and the other end of the spring is connected to the top of the inner wall of the support rod.

[0016] The technical effect of adopting the above-mentioned further solution is that the spring three drives the fixed block to move upward, thereby adjusting the height of the support plate in the vertical direction.

[0017] In a preferred embodiment, the support module further includes: A control rod is embedded in the connecting column, and a pull plate is installed on the top of the control rod; Spring four is sleeved on the control rod; The two ends of the spring are respectively connected to one side of the control rod and the bottom and top of the inner wall of the connecting column.

[0018] The technical effect of adopting the above-mentioned further solution is that the spring four drives the control rod to move automatically downward.

[0019] In a preferred embodiment, the support module further includes: A slot one is formed inside the fixing block, and two slot two are formed on both sides of the inside of the fixing block; Two T-shaped fixing strips are respectively embedded in the slot two, and spring five is sleeved on the T-shaped fixing strips; The first slot is connected to the two second slots, and the two ends of the fifth spring are respectively connected to one side of the inner wall of the second slot and one side of the T-shaped fixing strip.

[0020] The technical effect of adopting the above-mentioned further solution is that the position of the fixing block is controlled by embedding the T-shaped fixing strip into the locating hole.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model involves manually pulling a T-shaped pull column horizontally to one side. The T-shaped pull column moves the connecting plate to one side, compressing the second spring. The connecting plate then moves multiple positioning columns, causing them to disengage from multiple positioning holes. This allows the auxiliary sleeve and positioning holes to rotatably. The elasticity of the first spring causes the rotating sleeve to rotate to one side, which in turn causes the backrest to rotate to one side. Releasing the T-shaped pull column allows the elasticity of the second spring to return the multiple positioning columns to their corresponding positions in the positioning holes, thus fixing the tilt angle. In this design, the rotating module, in conjunction with the first spring, ensures the backrest always has a forward-tilting tendency, facilitating user adjustment of the backrest's tilt angle without manual support.

[0022] 2. In this utility model, pulling the pull plate vertically upwards causes the control rod to move upwards along the inner wall of the connecting column, compressing the spring four. The bottom end of the control rod disengages from one side of the two T-shaped fixing strips, causing them to lose their support. The two T-shaped fixing strips, pushed by the spring five, move from both sides towards the center and are pulled out of the locking holes. The fixing block is thus in a movable state. Under the elastic action of the spring three, the fixing block drives the connecting column upwards, and simultaneously drives the support plate upwards. Releasing the pull plate, under the elastic action of the spring four, causes the control rod to move downwards, causing the two T-shaped fixing strips to move to both sides and then embed into the corresponding locking holes, completing the height fixation. In this design, the support module is used to adjust the height of the support plate, providing auxiliary support for the elbows of users who are in a prolonged office position, preventing joint fatigue. Attached Figure Description

[0023] Figure 1 A schematic diagram of the main structure of an office chair back elastic tilt adjustment device provided by this utility model; Figure 2 A schematic diagram of the seat back side structure of an office chair back elastic tilt adjustment device provided by this utility model; Figure 3 A schematic diagram of the internal structure of the backrest of an office chair with elastic tilt adjustment device provided by this utility model; Figure 4 A schematic diagram of the rotating module structure of an office chair back elastic tilt adjustment device provided by this utility model; Figure 5 A schematic diagram of the support module structure of an office chair back elastic tilt adjustment device provided by this utility model; Figure 6 A schematic diagram of the internal separation structure of the support module of the elastic tilt adjustment device for the backrest of an office chair provided by this utility model; Figure 7 This utility model provides a half-sectional structural diagram of the support module of an office chair back elastic tilt adjustment device.

[0024] Legend: 1. Seat cushion; 101. Rotating shaft; 102. Spring 1; 103. Rotating sleeve; 104. Auxiliary sleeve; 105. Positioning hole; 106. Backrest; 2. Inner cavity; 201. Through hole; 202. T-shaped pull column; 203. Connecting plate; 204. Positioning column; 205. Spring 2; 3. Support rod; 301. Insertion hole; 302. Connecting column; 303. Displacement plate; 304. Fixing block; 305. Spring 3; 306. Support plate; 4. Control rod; 401. Pull plate; 402. Spring 4; 403. Groove 1; 404. Groove 2; 405. T-shaped fixing strip; 406. Spring 5. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0026] Please see Figures 1-7 This embodiment provides an elastic tilt adjustment device for the backrest of an office chair, the specific idea of ​​which is as follows: An office chair backrest elastic tilt adjustment device includes a seat cushion 1, and the office chair backrest elastic tilt adjustment device also includes a backrest 106 and a rotating module.

[0027] The backrest 106 is located on one side of the seat cushion 1.

[0028] Meanwhile, the adjustment module is located on one side of the seat cushion 1 and is used to adjust the rotation angle of the backrest 106.

[0029] As examples, in this embodiment, the rotating module includes: a rotating shaft 101, a first spring 102, a rotating sleeve 103, multiple positioning holes 105, an inner cavity 2, a T-shaped pulling column 202, a connecting plate 203, and a second spring 205.

[0030] The rotating shaft 101, which acts as a pivot, is installed on one side of the seat cushion 1.

[0031] Meanwhile, a spring 102, which provides elasticity, is fitted onto the rotating shaft 101.

[0032] It should be noted that one end of spring 102 is connected to one side of seat cushion 1, and spring 102 is torsional elastic, which can drive the rotating sleeve 103 to automatically flip to one side.

[0033] Furthermore, the rotating sleeve 103, which plays a rotating role, is sleeved on the spring 102, and an auxiliary sleeve 104 is installed on one side of the rotating sleeve 103.

[0034] In order to position the flip angle of the backrest 106, multiple positioning holes 105 are provided on one side of the auxiliary sleeve 104.

[0035] It should be noted that the other end of the spring 102 is connected to one side of the inner wall of the rotating sleeve 103, and the rotating sleeve 103 is fixedly connected to the backrest 106.

[0036] In this design, an inner cavity 2 is provided inside one side of the seat cushion 1, and multiple through holes 201 are provided on one side of the inner wall of the inner cavity 2.

[0037] The T-shaped pulling column 202, which is used for pulling, is embedded in the inner cavity 2.

[0038] It should be added that the positions of the multiple through holes 201 correspond to the positions of the multiple positioning holes 105, and one end of the T-shaped pull post 202 is located on the outside of the seat cushion 1.

[0039] In addition, a connecting plate 203 that bears the load is installed on one side of the T-shaped pull column 202, and multiple positioning columns 204 are installed on one side of the connecting plate 203.

[0040] Furthermore, the elastic spring 205 is sleeved on the T-shaped pull column 202.

[0041] It should be noted that multiple positioning pins 204 can be inserted into multiple positioning holes 105 through multiple through holes 201, and the two ends of the spring 205 are respectively connected to one side of the inner wall of the inner cavity 2 and one side of the connecting plate 203.

[0042] In this embodiment, the T-shaped pull column 202 is manually pulled to one side in the horizontal direction. The T-shaped pull column 202 drives the connecting plate 203 to move to one side. The second spring 205 is in a compressed state. The connecting plate 203 drives the multiple positioning columns 204 to move and pull them out of the multiple positioning holes 105. This makes the auxiliary sleeve 104 and the positioning holes 105 rotatable. The elastic action of the first spring 102 drives the rotating sleeve 103 to rotate to one side, which in turn drives the backrest 106 to rotate to one side. The T-shaped pull column 202 is released. The elastic action of the second spring 205 causes the multiple positioning columns 204 to return to the corresponding positions in the multiple positioning holes 105, thereby fixing the tilt angle.

[0043] Implementation: 2:

[0044] Please see Figures 1-7Based on Embodiment 1, this embodiment provides an elastic tilt adjustment device for the backrest of an office chair, the specific idea of ​​which is as follows: The office chair backrest tilt adjustment device also includes: two support rods 3 and two support modules.

[0045] The two support rods 3, which provide support, are installed on both sides of the seat cushion 1.

[0046] Meanwhile, the two support modules are installed inside the support rod 3 and can move linearly in the vertical direction to support the user's elbows.

[0047] As examples, in this embodiment, the support module includes: multiple insertion holes 301, connecting posts 302, support plates 306, control rods 4, springs 402, slots 403, and two T-shaped fixing strips 405.

[0048] Among them, multiple locking holes 301, which play a fixing role, are respectively installed on both sides of the inner wall of the support rod 3.

[0049] Meanwhile, the connecting column 302, which plays a connecting role, is embedded in the support rod 3. A displacement plate 303 is installed on the top of the connecting column 302, and a fixing block 304 is installed on the bottom of the connecting column 302. Two springs 305 are installed on the top of the fixing block 304.

[0050] In addition, the support plate 306, which plays a supporting role, is installed on the displacement plate 303.

[0051] It should be noted that the displacement plate 303 is located outside the support rod 3, the fixing block 304 is located inside the support rod 3, and the other end of the spring 305 is connected to the top of the inner wall of the support rod 3.

[0052] In this design, a control rod 4 is also embedded in the connecting column 302, and a pull plate 401 is installed on the top of the control rod 4.

[0053] Among them, the elastic spring 402 is sleeved on the control rod 4.

[0054] It should be added that the two ends of spring 402 are connected to one side of control rod 4 and the bottom and top of the inner wall of connecting column 302, respectively.

[0055] Among them, the auxiliary slot 403 is opened inside the fixing block 304, and two slots 404 are opened on both sides of the inside of the fixing block 304.

[0056] In addition, two T-shaped fixing strips 405 that play a fixing role are respectively embedded in the slot 404, and springs 406 are sleeved on the T-shaped fixing strips 405.

[0057] It should be noted that slot 1 403 is connected to two slots 2 404, and the two ends of spring 5 406 are respectively connected to one side of the inner wall of slot 2 404 and one side of T-shaped fixing strip 405.

[0058] In this embodiment, pulling the pull plate 401 vertically upward causes the control rod 4 to move upward along the inner wall of the connecting column 302, squeezing the spring 402. The bottom end of the control rod 4 disengages from one side of the two T-shaped fixing strips 405, causing them to lose their support. Under the push of the spring 406, the two T-shaped fixing strips 405 move from both sides towards the center and are pulled out from the insertion hole 301. The fixing block 304 is thus in a movable state. Under the elastic action of the spring 305, the fixing block 304 drives the connecting column 302 to move upward and drives the support plate 306 to move upward synchronously. When the pull plate 401 is released, under the elastic action of the spring 402, the control rod 4 moves downward and causes the two T-shaped fixing strips 405 to move to both sides, thereby embedding into the corresponding insertion hole 301, completing the height fixation.

[0059] Working principle: When the user needs to adjust the tilt angle of the backrest 106, the T-shaped pull column 202 is manually pulled to move it to one side in the horizontal direction. The T-shaped pull column 202 drives the connecting plate 203 to move to one side, while simultaneously squeezing the spring 205. The connecting plate 203 drives multiple positioning columns 204 to move, and the multiple positioning columns 204 disengage from the multiple positioning holes 105, thereby releasing the rotation restriction of the auxiliary sleeve 104 and the positioning holes 105. Under the elastic action of the spring 102, the rotating sleeve 103 rotates to one side, thereby driving the backrest 106 to rotate to one side. When it is necessary to fix the backrest 106, the T-shaped pull column 202 is released. Under the elastic action of the spring 205, the positioning columns 204 return to the multiple positioning holes 105 to perform tilt angle positioning.

[0060] When the height of the support plate 306 needs to be adjusted, manually pull the pull plate 401 to move it vertically upward. When the control rod 4 moves upward along the inner wall of the connecting column 302, it squeezes the spring 402. The bottom end of the control rod 4 disengages from one side of the two T-shaped fixing strips 405. After losing support, the two T-shaped fixing strips 405 move from both sides towards the center under the push of the spring 406. In this state, the T-shaped fixing strips 405 disengage from the insertion hole 301, thereby releasing the movement restriction of the fixing block 304. Under the elastic action of the spring 305, the fixing block 304 drives the connecting column 302 to move upward, and the displacement plate 303 drives the support plate 306 to move upward synchronously. When the height needs to be fixed, release the pull plate 401. The spring 402 pushes the control rod 4 downward, thereby causing the two T-shaped fixing strips 405 to move to both sides and embed into the corresponding insertion hole 301 to complete the fixation.

[0061] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0062] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An office chair backrest elastic tilt adjustment device, comprising a seat cushion (1), characterized in that, The office chair backrest elastic tilt adjustment device also includes: The backrest (106) is located on one side of the seat cushion (1); A rotating module, located on one side of the seat cushion (1), is used to adjust the rotation angle of the backrest (106); Two support rods (3) are respectively installed on both sides of the seat cushion (1); Two support modules are installed in the support rod (3) respectively, and can move in a straight line in the vertical direction to support the user's elbow.

2. The office chair backrest elastic tilt adjustment device according to claim 1, characterized in that, The rotating module includes: A rotating shaft (101) is installed on one side of the seat cushion (1); Spring 1 (102) is sleeved on the rotating shaft (101); One end of the spring (102) is connected to one side of the seat cushion (1).

3. The office chair backrest elastic tilt adjustment device according to claim 2, characterized in that, The rotating module also includes: A rotating sleeve (103) is fitted onto the spring (102), and an auxiliary sleeve (104) is installed on one side of the rotating sleeve (103). Multiple positioning holes (105) are provided on one side of the auxiliary sleeve (104); The other end of the spring (102) is connected to one side of the inner wall of the rotating sleeve (103), and the rotating sleeve (103) is fixedly connected to the backrest (106).

4. The office chair backrest elastic tilt adjustment device according to claim 3, characterized in that, The rotating module also includes: The inner cavity (2) is located inside one side of the cushion (1), and a plurality of through holes (201) are provided on one side of the inner wall of the inner cavity (2). The T-shaped pull post (202) is embedded in the inner cavity (2); The positions of the plurality of through holes (201) correspond to the positions of the plurality of positioning holes (105), and one end of the T-shaped pull post (202) is located outside the seat cushion (1).

5. The office chair backrest elastic tilt adjustment device according to claim 4, characterized in that, The rotating module also includes: A connecting plate (203) is installed on one side of the T-shaped pull column (202), and a plurality of positioning columns (204) are installed on one side of the connecting plate (203). Spring 2 (205) is sleeved on the T-shaped pull column (202); Among them, multiple positioning pins (204) can be inserted into multiple positioning holes (105) through multiple through holes (201), and the two ends of the second spring (205) are respectively connected to one side of the inner wall of the inner cavity (2) and one side of the connecting plate (203).

6. The office chair backrest elastic tilt adjustment device according to claim 1, characterized in that, The support module includes: Multiple mortise holes (301) are respectively installed on both sides of the inner wall of the support rod (3); A connecting column (302) is embedded in the support rod (3). A displacement plate (303) is installed on the top of the connecting column (302), and a fixing block (304) is installed on the bottom of the connecting column (302). Two springs (305) are installed on the top of the fixing block (304). A support plate (306) is installed on the displacement plate (303); The displacement plate (303) is located outside the support rod (3), the fixing block (304) is located inside the support rod (3), and the other end of the spring (305) is connected to the top of the inner wall of the support rod (3).

7. The office chair backrest elastic tilt adjustment device according to claim 6, characterized in that, The support module also includes: The control rod (4) is embedded in the connecting column (302), and a pull plate (401) is installed on the top of the control rod (4). Spring 4 (402) is sleeved on the control rod (4); The two ends of the spring four (402) are respectively connected to one side of the control rod (4) and the bottom and top of the inner wall of the connecting column (302).

8. The office chair backrest elastic tilt adjustment device according to claim 7, characterized in that, The support module also includes: A slot one (403) is opened inside the fixing block (304), and two slot two (404) are opened on both sides of the inside of the fixing block (304). Two T-shaped fixing strips (405) are respectively embedded in the slot two (404), and spring five (406) is sleeved on the T-shaped fixing strips (405). Among them, the first slot (403) is connected to the two second slots (404), and the two ends of the fifth spring (406) are respectively connected to one side of the inner wall of the second slot (404) and one side of the T-shaped fixing strip (405).

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