Middle rod lifting structure of sitting posture corrector

Abstract

The utility model provides a middle rod lifting structure of a sitting posture correcting device, and belongs to the technical field of sitting posture correcting equipment. Comprising a bottom rod, a first sliding groove is formed in the top of the bottom rod, a connecting rod is slidably arranged in the first sliding groove, a second sliding groove is formed in the top of the connecting rod, an ejector rod is slidably arranged in the second sliding groove, a threaded groove is formed in the lower end of the ejector rod, and a threaded rod is in threaded connection in the threaded groove; a round groove is formed in the bottom wall of the first sliding groove, a second bearing is fixed in the round groove, a second cylinder is fixed to the inner wall of the second bearing, a lower bevel gear meshed with the upper bevel gear is fixed to the upper end of the second cylinder, and a mounting hole is formed in the center of the upper end of the lower bevel gear. A straight gear is fixed to the end, penetrating through the first bearing, of the cylinder, and a rack is fixed to the inner side wall of the first sliding groove. The height of the ejector rod and the height of the connecting rod can be adjusted at the same time, the requirements of different users are met, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to the technical field of sitting posture correction devices, and relates to a middle rod lifting structure in a sitting posture corrector. Background Art

[0002] A sitting posture corrector is an auxiliary tool designed to improve sitting posture, aiming to help users maintain correct sitting postures and reduce the adverse effects caused by long-term sitting postures.

[0003] Currently, users will continuously maintain a bent and head-down state when working or reading. Over time, it will cause a certain degree of impact on the user's spine and even physical development. In view of problems such as hunchback, myopia, and cervical spondylosis of users, in order to enable users to maintain good sitting postures, sitting posture correctors have been designed in the prior art. However, the middle rod structure of the existing devices is not convenient to adjust during use and cannot be adjusted more precisely according to the needs of different users. To solve the above problems, we have introduced a middle rod lifting structure for a sitting posture corrector. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and propose a middle rod lifting structure for a sitting posture corrector, which is used to solve the technical problem that the middle rod structure of the prior art cannot be adjusted in height according to the needs of users mentioned in the background art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A middle rod lifting structure for a sitting posture corrector, comprising:

[0007] A bottom rod;

[0008] A connecting rod, a chute one with an upward opening is formed on the bottom rod, and the connecting rod is slidably arranged in the chute one;

[0009] A top rod, a chute two with an upward opening is formed on the connecting rod, and the top rod is slidably arranged in the chute two;

[0010] A threaded rod, a threaded groove is formed at the lower end of the top rod, and one end of the threaded rod is threadedly installed in the threaded groove;

[0011] An upper bevel gear, a cylinder one is fixed at one end of the upper bevel gear, a bearing one is sleeved on the outer wall of the cylinder one, and a circular hole for embedding the bearing one is formed on the side wall of the chute two;

[0012] A lower bevel gear, a cylinder two is fixed at the lower end of the lower bevel gear, a bearing two is sleeved on the outer wall of the cylinder two, a circular groove for embedding the bearing two is formed on the bottom wall of the chute one, the lower bevel gear meshes with the upper bevel gear, and a mounting hole for embedding the lower end of the threaded rod is formed at the center of the upper end of the lower bevel gear;

[0013] A spur gear, a connecting column is fixed to one end of the cylinder. One end of the spur gear is fixed to the outer end of the connecting rod through a bearing one, and a rack meshing with the spur gear is fixed to the inner side wall of the chute one.

[0014] Working principle:

[0015] When in the unfolded state: Drag the ejector rod upwards. The threaded groove provided on the ejector rod will drive the threaded rod to rotate under the thread fit. The threaded rod drives the lower bevel gear to rotate, the lower bevel gear drives the upper bevel gear to rotate, and the upper bevel gear then drives the spur gear to rotate. The spur gear meshes with the rack provided on the bottom rod. When the ejector rod is dragged upwards, the spur gear will mesh with the rack and crawl upwards along the rack under the transmission of the above components, driving the connecting rod to move upwards. The ejector rod and the connecting rod move upwards simultaneously by the same distance;

[0016] When in the retracted state: Apply a downward pressure to the ejector rod. The threaded groove provided on the ejector rod drives the threaded rod to rotate in the opposite direction. The threaded rod drives the lower bevel gear, the lower bevel gear drives the upper bevel gear, and the upper bevel gear drives the spur gear to crawl downwards in the rack provided inside the bottom rod that meshes with it. The connecting rod and the ejector rod move downwards simultaneously, and when the movement ends, it is all retracted.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The structure of the present utility model is reasonable and the operation is convenient. By setting the bottom rod, connecting rod, ejector rod, threaded rod, upper bevel gear, lower bevel gear, spur gear, and rack to cooperate, the heights of the ejector rod and the connecting rod can be effectively adjusted simultaneously, thereby meeting the needs of different users and having a wide range of applications. Description of the drawings

[0019] Figure 1 is the structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 is the cross-sectional view of an embodiment of the present utility model;

[0021] Figure 3 is the cross-sectional view of the ejector rod of an embodiment of the present utility model;

[0022] Figure 4 is the cross-sectional view of the bottom rod of an embodiment of the present utility model;

[0023] Figure 5 is the cross-sectional view of the connecting rod of an embodiment of the present utility model;

[0024] Figure 6 is the assembly schematic diagram of the threaded rod, upper bevel gear, and lower bevel gear of an embodiment of the present utility model;

[0025] Figure 7 is the structural schematic diagram of the bottom rod of an embodiment of the present utility model;

[0026] Figure 8 It is a schematic structural view of the ejector rod in the embodiment of the present utility model;

[0027] Figure 9 is the Figure 2 enlarged view of part A in the embodiment of the present utility model.

[0028] Explanation of reference numerals: 1, bottom rod; 2, connecting rod; 3, first chute; 4, ejector rod; 5, second chute; 6, threaded rod; 7, threaded groove; 8, upper bevel gear; 9, first cylinder; 10, first bearing; 11, round hole; 12, lower bevel gear; 13, second cylinder; 14, second bearing; 15, round groove; 16, annular block; 17, spur gear; 18, connecting column; 19, rack; 20, adjustment groove; 21, button; 22, convex block; 23, rotating shaft; 24, spring; 25, locking block; 26, guiding hole; 27, groove; 28, limiting block; 29, locking groove; 30, adjusting inclined surface; 31, positioning ring; 32, positioning column; 33, notch. Detailed implementation manners

[0029] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0030] As Figure 1-6 shown in FIGS.

[0031] Bottom rod 1;

[0032] Connecting rod 2, the bottom rod 1 is provided with a first chute 3 with an upward opening, and the connecting rod 2 is slidably arranged in the first chute 3;

[0033] Ejector rod 4, the connecting rod 2 is provided with a second chute 5 with an upward opening, and the ejector rod 4 is slidably arranged in the second chute 5;

[0034] Threaded rod 6, the lower end of the ejector rod 4 is provided with a threaded groove 7, and one end of the threaded rod 6 is threadedly installed in the threaded groove 7;

[0035] Upper bevel gear 8, one end of the upper bevel gear 8 is fixed with a first cylinder 9, the outer wall of the first cylinder 9 is sleeved with a first bearing 10, and the side wall of the second chute 5 is provided with a round hole 11 for the first bearing 10 to be embedded;

[0036] Lower bevel gear 12, the lower end of the lower bevel gear 12 is fixed with a second cylinder 13, the outer wall of the second cylinder 13 is sleeved with a second bearing 14, the bottom wall of the first chute 3 is provided with a round groove 15 for the second bearing 14 to be embedded, the lower bevel gear 12 is meshed with the upper bevel gear 8, and the center of the upper end of the lower bevel gear 12 is provided with an installation hole for the lower end of the threaded rod 6 to be embedded;

[0037] The spur gear 17 has a connecting column 18 fixed to one end of the cylinder 9. One end of the spur gear 17 is fixed to the outer end of the connecting rod 2 through the bearing 10 with the connecting column 18. A rack 19 meshing with the spur gear 17 is fixed to the inner side wall of the chute 1 3.

[0038] Drag the ejector rod 4 upwards. The threaded groove 7 provided on the ejector rod 4 will drive the threaded rod 6 to rotate under threaded engagement. The threaded rod 6 drives the lower bevel gear 12 to rotate. The lower bevel gear 12 drives the upper bevel gear 8 to rotate. The upper bevel gear 8 then drives the spur gear 17 to rotate. The spur gear 17 meshes with the rack 19 provided on the bottom rod 1. When the ejector rod 4 is dragged upwards, the spur gear 17 will mesh with the rack 19 and crawl upwards along the rack 19 under the transmission of the above components to drive the connecting rod 2 to move upwards. The ejector rod 4 and the connecting rod 2 move upwards at the same distance.

[0039] Apply a downward pressure to the ejector rod 4. The threaded groove 7 provided on the ejector rod 4 drives the threaded rod 6 to rotate in the opposite direction. The threaded rod 6 drives the lower bevel gear 12. The lower bevel gear 12 drives the upper bevel gear 8. The upper bevel gear 8 drives the spur gear 17 to crawl downwards in the rack 19 provided inside the bottom rod 1 and meshing with it. The connecting rod 2 and the ejector rod 4 move downwards at the same time. When the movement ends, it is all retracted.

[0040] Such as Figure 1 、 2As shown in Figures 7 and 9, one end of the lower rod has an adjustment groove 20. A button 21 is movably installed in the adjustment groove 20. One side of the button 21 has a convex block 22. A rotating shaft 23 is fixed to the inner wall of the adjustment groove 20. The convex block 22 is provided with a rotating hole for the rotating shaft 23 to pass through. A spring 24 is fixed to the inner bottom wall of the adjustment groove 20. One end of the spring 24 is fixed to one side of the button 21 and is located below the convex block 22. A locking block 25 located above the convex block 22 is fixed to one side of the button 21. The bottom rod 1 is provided with a guiding hole 26 that communicates with the adjustment groove 20 and through which the locking block 25 can pass. One side of the connecting rod 2 has a groove 27 opposite to the guiding hole 26. A number of equally spaced and vertically distributed limiting blocks 28 are fixed to the inner wall of the groove 27. The cross-section of the limiting block 28 is triangular. One end of the locking block 25 is provided with a locking groove 29 for the limiting block 28 to be embedded. The upper side wall of the locking groove 29 has an adjustment inclined surface 30 that abuts against and cooperates with the upper inclined surface of the limiting block 28. The lower end of the limiting block 28 can abut against the upper end of the locking block 25. Press the button 21 to make the button 21 rotate around the rotating shaft 23 and make the locking block 25 provided on the button 21 disengage from the limiting block 28 provided in the groove 27. Release the button 21. Under the action of the spring 24, the button 21 rotates around the rotating shaft 23, and the locking block 25 provided on the button 21 is embedded into the groove 27, and the limiting block 28 is embedded into the locking groove 29. The inner bottom wall of the adjustment groove 20 has a positioning ring 31. A positioning post 32 located inside the positioning ring 31 is fixed to the inner bottom wall of the adjustment groove 20. The spring 24 is embedded in the positioning ring 31. The spring 24 is sleeved on the positioning post 32.

[0041] As Figure 8 、 9 shown, the lower end of the top rod 4 is provided with a notch 33 for the upper bevel gear 8 to be embedded. The inner side wall of the circular groove 15 has an annular block 16. The lower end of the annular block 16 abuts against the upper end of the bearing two 14. One end of the cylinder two 13 passes through the arc-shaped block. The lower bevel gear 12 is located above the annular block 16. The annular block 16 and the circular groove 15 are integrally formed.

[0042] The specific operation method of the present utility model is as follows:

[0043] When increasing the height: Drag the push rod 4 upwards. The threaded groove 7 provided on the push rod 4 will drive the threaded rod 6 to rotate under threaded engagement. The threaded rod 6 drives the lower bevel gear 12 to rotate, the lower bevel gear 12 drives the upper bevel gear 8 to rotate, and the upper bevel gear 8 then drives the spur gear 17 to rotate. The spur gear 17 meshes with the rack 19 provided on the bottom rod 1. When the push rod 4 is dragged upwards, the spur gear 17 will mesh with the rack 19 and crawl upwards along the rack 19 under the drive of the above components, driving the connecting rod 2 to move upwards. The push rod 4 and the connecting rod 2 move upwards by the same distance. When the push rod 4 and the connecting rod 2 move upwards, there is no need to press the button 21 to unlock the connecting rod 2; when dragging the push rod 4 upwards, under the guiding action of the upper inclined surface of the limiting block 28 provided on the connecting rod 2 and the adjusting inclined surface 30 of the locking block 25, the button 21 will automatically pop up upwards, unlocking the connecting rod 2, and the push rod 4 and the connecting rod 2 can move upwards normally. When the push rod 4 and the connecting rod 2 move downwards, the locking block 25 provided on the button 21 cooperates with the limiting block 28 provided on the connecting rod 2, preventing the connecting rod 2 from moving downwards. Therefore, the push rod 4 will also be unable to move downwards;

[0044] When decreasing the height: Press the end of the button 21 close to the spring 24 downwards. The button 21 rotates around the rotating shaft 23, and the locking block 25 provided on the button 21 disengages from the limiting block 28 provided in the groove 27, applying a downward pressure to the push rod 4. The threaded groove 7 provided on the push rod 4 drives the threaded rod 6 to rotate in the opposite direction. The threaded rod 6 drives the lower bevel gear 12, the lower bevel gear 12 drives the upper bevel gear 8, and the upper bevel gear 8 drives the spur gear 17 to crawl downwards in the rack 19 provided inside the bottom rod 1 and meshing with it. The connecting rod 2 and the push rod 4 move downwards simultaneously. When it is suitable to use at a certain position, release the button 21. The button 21 will automatically reset and bounce back under the action of the spring 24, causing the button 21 to rotate around the rotating shaft 23, and the locking block 25 provided on the button 21 to be embedded into the groove 27, and the limiting block 28 to be embedded into the locking groove 29, so as to adjust the suitable height for use in this way.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A middle rod lifting structure of a sitting posture corrector, characterized in that: include: Bottom bar (1); A connecting rod (2), wherein the bottom rod (1) is provided with a slide groove (3) opening upward, and the connecting rod (2) is slidably arranged in the slide groove (3); A push rod (4), the connecting rod (2) is provided with a second slide groove (5) opening upward, and the push rod (4) is slidably arranged in the second slide groove (5); A threaded rod (6), wherein a threaded groove (7) is formed at the lower end of the push rod (4), and one end of the threaded rod (6) is threadably mounted in the threaded groove (7); An upper bevel gear (8), wherein a cylinder (9) is fixed at one end of the upper bevel gear (8), a bearing (10) is sleeved on the outer wall of the cylinder (9), and a circular hole (11) is provided on the side wall of the slide groove (5) for embedding the bearing (10); A lower bevel gear (12), a second cylinder (13) is fixed at the lower end of the lower bevel gear (12), a second bearing (14) is sleeved on the outer wall of the second cylinder (13), a circular groove (15) is opened on the bottom wall of the first slide groove (3) for the second bearing (14) to be embedded, the lower bevel gear (12) is meshed with the upper bevel gear (8), and a mounting hole is opened at the center of the upper end of the lower bevel gear (12) for the lower end of the threaded rod (6) to be embedded; A spur gear (17), a connecting column (18) is fixed to one end of the cylinder (9), one end of the spur gear (17) and the connecting column (18) are fixed to the outer end of the connecting rod (2) through a bearing (10), and a rack (19) meshing with the spur gear (17) is fixed to the inner wall of the slide groove (3).

2. The middle rod lifting structure of the sitting posture corrector according to claim 1, characterized in that: The bottom rod (1) has an adjustment groove (20) at one end, a button (21) is movably installed in the adjustment groove (20), a convex block (22) is provided on one side of the button (21), a rotating shaft (23) is fixed on the inner wall of the adjustment groove (20), a rotating hole for the rotating shaft (23) to pass through is provided on the convex block (22), a spring (24) is fixed on the inner bottom wall of the adjustment groove (20), one end of the spring (24) is fixed to one side of the button (21) and is located at the lower side of the convex block (22), a locking block (25) is fixed on one side of the button (21) and is located at the upper side of the convex block (22), and the bottom rod (1) has a guide hole (26) which is connected to the adjustment groove (20) and can allow the locking block (25) to pass through.

3. The middle rod lifting structure of the sitting posture corrector according to claim 2, characterized in that: One side of the connecting rod (2) is provided with a groove (27) opposite to the guide hole (26); a plurality of equally spaced and vertically distributed limit blocks (28) are fixed to the inner wall of the groove (27); the cross section of the limit block (28) is triangular; one end of the locking block (25) is provided with a locking groove (29) for the limit block (28) to be embedded; the upper side wall of the locking groove (29) is provided with an adjusting inclined surface (30) which abuts against and cooperates with the upper inclined surface of the limit block (28); the lower end of the limit block (28) can abut against the upper end of the locking block (25).

4. The middle rod lifting structure of the sitting posture corrector according to claim 2, characterized in that: The inner bottom wall of the adjustment groove (20) has a positioning ring (31), the inner bottom wall of the adjustment groove (20) has a positioning column (32) located in the positioning ring (31), the spring (24) is embedded in the positioning ring (31), and the spring (24) is sleeved on the positioning column (32).

5. The middle rod lifting structure of the sitting posture corrector according to claim 1, characterized in that: The lower end of the push rod (4) is provided with a notch (33) for the upper bevel gear (8) to be embedded.

6. The middle rod lifting structure of the sitting posture corrector according to claim 1, characterized in that: The inner side wall of the circular groove (15) is provided with an annular stopper (16), and the lower end of the annular stopper (16) abuts against the upper end of the second bearing (14).

7. The middle rod lifting structure of the sitting posture corrector according to claim 6, characterized in that: One end of the second cylinder (13) passes through an arc-shaped stopper, and the lower bevel gear (12) is located on the upper side of the annular stopper (16). The annular stopper (16) and the circular groove (15) are integrated.

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