Anti-sway structure of a chair

Abstract

The present invention discloses an anti-sway structure for a chair, including an adjusting screw provided with a connecting thread and a screw head; a seat plate assembly including a seat plate, a connecting frame with a mounting hole in the middle of the seat plate being provided at the bottom, and a screw head being provided through the mounting hole; a bottom frame assembly including a bracket, a sleeve being provided in the middle of the bracket and being sleeved outside the adjusting screw, a bolt being provided in the sleeve and being matched with the connecting thread, a rubber pad being provided between the adjusting screw and the sleeve, a matching concave platform being provided on the rubber pad and being interference-fitted with the bottom of the adjusting screw, and an active gap being formed between the outer wall of the rubber pad and the inner wall of the sleeve, and the active gap being 0.070-0.250mm. By providing a rubber pad between the adjusting screw and the sleeve, the upper limit adjusting screw is placed in the horizontal direction to avoid the adjusting screw from shaking, an active gap is provided between the outer wall of the rubber pad and the sleeve, and the active gap is controlled within the range of 0.070-0.250mm, and the adjusting screw can be easily rotated and adjusted on the premise of avoiding the shaking of the seat plate, thereby improving the user experience.

Description

Technical Field

[0001] The invention relates to the technical field of daily necessities, and in particular to an anti-swaying structure of a chair. Background Art

[0002] Chairs are daily necessities frequently used in daily life. In order to meet the needs of users of different heights, many height-adjustable chairs are available on the market. The height adjustment devices of such chairs are mostly designed as screws connected to the seat plates that pass through screw holes in the chair base. The height is adjusted by the screws and screw holes. After long-term use, the screws are repeatedly rotated and adjusted, causing the gap between the screws and the screw holes to increase, resulting in the screws shaking. Affected by the shaking of the screws and the user's sitting posture, the connection between the screws and the seat plates is unevenly stressed and has a small contact area. The seat plates are easily loosened and shaken, affecting the reliability of the chair. When users sit on the chairs, they are easily unstable due to the shaking of the chairs and fall to the ground, which brings a bad user experience. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an anti-sway structure for a chair, which can prevent the seat plate from shaking and improve the user experience.

[0004] The technical solution adopted by the present invention is:

[0005] A chair anti-sway structure comprises: an adjusting screw, comprising a connecting thread and a screw head arranged at the top; a seat plate assembly, comprising a seat plate, a connecting frame is arranged at the bottom of the seat plate, a mounting hole is opened in the middle of the connecting frame, and the screw head is penetrated and arranged in the mounting hole so that the screw head and the connecting frame are tightly matched; a base frame assembly comprises a bracket, a sleeve is arranged in the middle of the bracket, the sleeve is sleeved outside the adjusting screw, and a bolt matching the connecting thread is arranged in the sleeve, a rubber pad is arranged between the adjusting screw and the sleeve, a matching recess is arranged on the rubber pad, the bottom of the adjusting screw is installed in the matching recess and has an interference fit with the rubber pad, and a movable gap is formed between the outer wall of the rubber pad and the inner wall of the sleeve, and the movable gap is 0.070-0.250mm.

[0006] As a further improvement to the above technical solution, the connecting frame includes a support plate fixedly connected to the seat plate, and a mounting sleeve arranged at the bottom of the support plate. The support plate and the mounting sleeve are in close contact with the screw head at the same time, thereby increasing the contact area between the seat plate assembly and the screw head, ensuring that the seat plate assembly and the connecting screw are reliably connected, and preventing the adjusting screw from penetrating the seat plate and causing damage due to pressure or excessive impact.

[0007] As a further improvement to the above technical solution, a plurality of rivets are connected between the seat plate and the support plate. The seat plate and the support plate are riveted together by rivets, which has a simple structure and reliable connection, and prevents the seat plate from loosening and falling off.

[0008] As a further improvement to the above technical solution, a limiting boss is provided at the bottom of the screw head to limit the insertion depth of the screw head to avoid excessive insertion and damage to the connecting thread and the seat plate of the adjusting screw.

[0009] As a further improvement to the above technical solution, a metal gasket is provided at the bottom of the rubber pad. The adjusting screw and the rubber pad are interference fit, and when the adjusting screw moves up and down, the bottom of the adjusting screw applies force to the rubber pad. The metal gasket provided at the bottom of the rubber pad supports the rubber pad to prevent the rubber pad from being damaged by force, effectively prolonging the service life of the rubber pad and improving the reliability of the structure.

[0010] As a further improvement to the above technical solution, a plurality of screws are connected between the metal gasket and the rubber gasket. The metal gasket is fixedly connected to the rubber gasket by screws, which has a simple structure and is easy to install. A plurality of screws are provided to prevent the metal gasket from rotating and driving the screw to rotate, causing the screw to loosen and fall out, thereby ensuring that the metal gasket is connected reliably.

[0011] As a further improvement to the above technical solution, the seat plate is provided with an installation recess for accommodating the rivet. By accommodating the rivet in the installation recess, the top of the rivet is flush with the seat plate surface, keeping the seat plate surface flat and beautiful, and the seat plate is comfortable to use.

[0012] As a further improvement to the above technical solution, the support plate is provided with a positioning recess for accommodating the installation recess. The positioning recess is adapted to the installation recess, and during installation, the installation recess of the seat plate is installed correspondingly to the positioning recess of the support plate, which limits the position of the seat plate in the horizontal direction, prevents the seat plate from shifting relative to the support plate, and facilitates installation and positioning.

[0013] Beneficial effects: The screw head and the connecting frame are closely matched, the adjusting screw and the seat plate assembly are tightly connected, and a rubber pad is set between the adjusting screw and the sleeve. The upper limit adjusting screw is placed in the horizontal direction to prevent the adjusting screw from shaking, thereby preventing the seat plate from shaking. The bottom of the adjusting screw and the rubber pad have an interference fit, so that the rubber pad rotates with the rotation of the adjusting screw. An active gap is set between the outer wall of the rubber pad and the sleeve, and the active gap is controlled within the range of 0.070-0.250mm. Under the premise of avoiding shaking of the seat plate, it is ensured that the adjusting screw can be easily rotated and adjusted, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1It is a structural schematic diagram of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A is an enlarged structural diagram;

[0017] Figure 3 for Figure 1 The enlarged structural diagram at B in FIG.

[0018] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of C in the figure.

[0019] Description of reference numerals:

[0020] 10. Adjusting screw; 11. Connecting thread; 12. Screw head; 13. Limiting boss; 20. Seat plate; 21. Mounting recess; 30. Connecting frame; 31. Mounting hole; 32. Support plate; 321. Positioning recess; 322. Mounting ring; 33. Mounting sleeve; 40. Bracket; 50. Sleeve; 51. Bolt; 60. Rubber pad; 61. Matching recess; 62. Movable gap; 70. Metal gasket; 80. Screw; 90. Rivet. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figures 1 to 3 According to an embodiment of the present invention, an anti-sway structure of a chair includes an adjusting screw 10, a seat plate assembly and a base frame assembly. The adjusting screw 10 includes a connecting thread 11 and a screw head 12 arranged at the top. The seat plate assembly includes a seat plate 20. A connecting frame 30 is fixedly arranged at the bottom of the seat plate 20. A mounting hole 31 is opened in the middle of the connecting frame 30. The screw head 12 is penetrated and arranged in the mounting hole 31, and the screw head 12 is tightly matched with the connecting frame 30. Preferably, the screw head 12 has a taper, which is convenient for inserting into the mounting hole 31 during installation. A limiting boss 13 is provided at the bottom of the screw head 12 to limit the insertion depth of the adjusting screw 10 to avoid damaging the connecting thread 11 and the seat plate 20 due to excessive insertion.

[0026] In this embodiment, the connecting frame 30 includes a support plate 32 fixedly connected to the seat plate 20, and a mounting sleeve 33 arranged at the bottom of the support plate 32. Preferably, a mounting ring 322 that cooperates with the outer surface of the screw head 12 is arranged in the middle of the support plate 32. The mounting ring 322 is integrally arranged with the support plate 32. The mounting ring 322 has a taper that is consistent with the taper of the screw head 12. The inner side wall of the mounting sleeve 33 that contacts the screw head 12 has a taper that is consistent with the taper of the screw head 12. The mounting sleeve 33 cooperates with the taper of the screw head 12. When the taper of the mounting ring 322 and the taper of the screw head 12 produce a slight deviation within the tolerance range, the seat plate 20 is prevented from being stuck. 0 loose, it can be understood that the mounting hole 31 passes through the support plate 32 and the mounting sleeve 33, the screw head 12 is inserted into the mounting hole 31, the support plate 32 and the mounting sleeve 33 are respectively fastened to the tapered screw head 12 through the tapered mounting ring 322 and the tapered inner side wall, thereby increasing the contact area between the seat plate assembly and the screw head 12, and ensuring that the seat plate assembly and the adjusting screw 10 are connected tightly and reliably. Preferably, the mounting sleeve 33 is set as a solid sleeve to increase the strength of the connection structure, thereby avoiding wear, looseness or cracking at the connection between the seat plate 20 and the adjusting screw 10 after long-term use, and further ensuring reliable connection.

[0027] In this embodiment, the chassis assembly includes a bracket 40 supported on the ground. Optionally, the bracket 40 includes three supporting legs. A sleeve 50 is provided in the middle of the bracket 40. The sleeve 50 is sleeved outside the adjusting screw 10, and a bolt 51 matching with the connecting thread 11 is provided in the sleeve 50. The bolt 51 is fixedly provided at the top of the sleeve 50. A rubber pad 60 is provided between the adjusting screw 10 and the sleeve 50. A matching concave platform 61 is provided on the rubber pad 60. The bottom of the adjusting screw 10 is installed on the matching concave platform 61. The rubber pad 60 is engaged in the concave platform 61 and has an interference fit with the rubber pad 60. An active gap 62 is formed between the outer wall of the rubber pad 60 and the inner wall of the sleeve 50. The active gap 62 is 0.070-0.250 mm. It can be understood that one end of the adjusting screw 10 is fixedly connected to the seat plate 20, and the other end of the adjusting screw 10 is inserted into the sleeve 50. The connecting thread 11 cooperates with the bolt 51 in the sleeve 50, and the adjusting screw 10 is rotated to adjust the height of the seat plate 20. The rubber pad 60 is used to limit the adjustment in the horizontal direction. The screw 10 is sectioned to prevent the adjusting screw 10 from shaking, thereby preventing the seat plate 20 from shaking, improving the user experience. At the same time, the bottom of the adjusting screw 10 is installed in the matching recess 61 of the rubber pad 60, and is in interference fit with the rubber pad 60. When the adjusting screw 10 is rotated, the rubber pad 60 will rotate accordingly. Therefore, an active gap 62 is set between the rubber pad 60 and the sleeve 50, so that the rubber pad 60 can follow the adjusting screw 10 to rotate and move up and down in the sleeve 50, and the active gap 62 is controlled within the range of 0.070-0.250mm. Preferably, the active gap 62 is set to 0.1mm, the upper deviation is 0.125mm, and the lower deviation is -0.025mm. The horizontal movement is limited to avoid the gap being too large, resulting in the failure of the limiting effect of the rubber pad 60 on the adjusting screw 10, or the gap being too small, increasing the friction between the rubber pad 60 and the sleeve 50, which is not conducive to the rotation and adjustment of the adjusting screw 10. Under the premise of avoiding the shaking of the seat plate 20, it is ensured that the adjusting screw 10 can be easily rotated and adjusted.

[0028] In this embodiment, a metal gasket 70 is provided at the bottom of the rubber pad 60. Preferably, the diameter of the metal gasket 70 is smaller than the diameter of the rubber pad 60 and not smaller than the diameter of the matching recessed platform 61. A plurality of screws 80 are connected between the metal gasket 70 and the rubber pad 60. Preferably, two screws 80 are provided. It can be understood that the rubber pad 60 is interference fit with the adjusting screw 10. When the adjusting screw 10 moves up and down, a force is applied to the rubber pad 60. In particular, when the adjusting screw 10 moves downward, the bottom of the adjusting screw 10 presses down against the rubber pad 60. Because the adjusting screw 10 is installed Installed in the matching recessed platform 61 of the rubber pad 60, the thickness of the rubber pad 60 corresponding to the matching recessed platform 61 is relatively small. After long-term use, the rubber pad 60 is easily damaged by force. A metal gasket 70 is used to support the rubber pad 60 to avoid the rubber pad 60 from being damaged by force, thereby effectively extending the service life of the rubber pad 60. The metal gasket 70 is fixedly connected to the rubber pad 60 by screws 80. The structure is simple and the installation is convenient. Two screws 80 are used to fix the metal gasket 70 to prevent the rotation of the metal gasket 70 from driving the screw 80 to rotate, causing the screw 80 to loosen and fall out, thereby ensuring that the metal gasket 70 is reliably connected.

[0029] Reference Figure 4 In this embodiment, a plurality of rivets 90 are connected between the seat plate 20 and the support plate 32. The seat plate 20 is provided with a mounting recess 21 for accommodating the rivet 90, and the support plate 32 is correspondingly provided with a positioning recess 321 for accommodating the mounting recess 21. It can be understood that the seat plate 20 and the support plate 32 are riveted with rivets 90, which has a simple structure and reliable fastening, thereby preventing the seat plate 20 and the support plate 32 from loosening. The rivet 90 is installed in the mounting recess 21 so that the top of the rivet 90 is flush with the surface of the seat plate 20, keeping the surface of the seat plate 20 flat, and the support plate 32 is correspondingly provided with a positioning recess 321 to cooperate with the mounting recess 21. During installation, the mounting recess 21 corresponds to the positioning recess 321 one by one, which is convenient for installation and positioning, and limits the position of the seat plate 20 in the horizontal direction to prevent the seat plate 20 from shifting relative to the support plate 32.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A chair anti-sway structure, characterized in that: include: An adjusting screw, comprising a connecting thread and a screw head arranged at the top; A seat plate assembly, comprising a seat plate, a connecting frame is provided at the bottom of the seat plate, a mounting hole is opened in the middle of the connecting frame, the screw head is penetrated and arranged in the mounting hole, so that the screw head and the connecting frame are closely matched, the connecting frame comprises a support plate fixedly connected to the seat plate, and a mounting sleeve arranged at the bottom of the support plate, the screw head has a taper, the inner side wall of the mounting sleeve in contact with the screw head has a taper and is consistent with the taper of the screw head, the mounting sleeve matches the taper of the screw head, and a plurality of rivets are connected between the seat plate and the support plate; The chassis assembly includes a bracket, a sleeve is provided in the middle of the bracket, the sleeve is sleeved outside the adjusting screw, and a bolt matching the connecting thread is provided in the sleeve, a rubber pad is provided between the adjusting screw and the sleeve, a matching recess is provided on the rubber pad, the bottom of the adjusting screw is installed in the matching recess and has an interference fit with the rubber pad, and a movable gap is formed between the outer wall of the rubber pad and the inner wall of the sleeve, and the movable gap is 0.070-0.250mm.

2. The anti-sway structure of a chair according to claim 1, characterized in that: A limiting boss is arranged at the bottom of the screw head.

3. The anti-sway structure of a chair according to claim 1, characterized in that: A metal gasket is arranged at the bottom of the rubber pad.

4. The anti-sway structure of a chair according to claim 3, characterized in that: A plurality of screws are connected between the metal gasket and the rubber gasket.

5. The anti-sway structure of a chair according to claim 1, characterized in that: The seat plate is provided with an installation recess for accommodating the rivet.

6. The anti-sway structure of a chair according to claim 5, characterized in that: The support plate is provided with a positioning recess for accommodating the installation recess.

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