Adjusting quick-release handrail
By setting arc racks on the side of the rotating base of the office chair armrest and combining the combination of elastic reset blocks and positioning blocks, the problem of uneven positioning of angle adjustment in the prior art is solved, and higher structural reliability and positioning accuracy are achieved.
Patent Information
- Application Number
- CN202421853594.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The angle adjustment structure of the existing office chair armrests has problems such as insufficient positioning force and the elastic resetting force cannot be fully applied, resulting in uneven positioning of the handrail after angle adjustment.
Replace conventional springs with elastic reset blocks, and an arc rack is installed on the sides of the rotating base. By combining the positioning block and the elastic reset block, more accurate angular positioning is achieved.
This structure can achieve complete positioning and alignment at any angle, improves the reliability and positioning force of the structure, and ensures uniform positioning of the handrail after angle adjustment.
Smart Images
Figure CN222955125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of office equipment, and particularly relates to an adjustable quick-release armrest. Background Art
[0002] An office chair armrest with a lateral sliding structure previously applied by the applicant includes an outer shell, a column, a column cover plate, a first cover plate, a second cover plate, and an armrest panel; a top plate of the outer shell is provided at the top of the outer shell, the top of the column is movably embedded in the bottom of the outer shell, the column cover plate is fixed to the top of the outer shell, the first cover plate and the second cover plate are fixed and provided with a cavity, the armrest panel is arranged outside the first cover plate and the second cover plate, and the second cover plate is movably connected to the column cover plate. The top plate of the outer shell is movably connected to the column cover plate, an adjusting block is arranged in the column cover plate, the adjusting block is fixed to the top plate of the outer shell, a floating block is arranged between the adjusting block and the top plate of the outer shell, the floating block is rotatably connected to the adjusting block, a circumferential positioning structure is arranged on the outer sides of the adjusting block and the floating block, and the adjusting block circumferentially limits the floating block through the circumferential positioning structure; a linear sliding positioning is arranged at the center of the bottom of the column cover plate and the floating block, and the column cover plate limits the floating block left and right; when the armrest is rotated and adjusted, the column cover plate, the first cover plate, and the second cover plate are rotated by an external force, so that the circumferential positioning structure loses the limit on the floating block, and thus the floating block can rotate arbitrarily around the adjusting block; when the external force disappears after the adjustment is completed, the circumferential positioning structure circumferentially limits the floating block; when the armrest is adjusted left and right, the linear sliding positioning loses the limit on the floating block, and thus the floating block slides left and right along the top plate of the outer shell, and the floating block is limited left and right after the adjustment is completed. The circumferential positioning structure is provided with two first springs, the two first springs are installed on the adjusting block, and the two first springs abut against both sides of the floating block, so that the floating block is positioned at an axial position, and at the same time, the two first springs enable the linear sliding positioning to limit the floating block in the left and right directions. The top plate of the outer shell is connected to the column cover plate, an adjusting block is arranged in the column cover plate, the column cover plate is provided with two arc-shaped holes distributed in the left and right directions, two ends of the adjusting block are respectively provided with a second bolt, and each second bolt passes through the arc-shaped hole and is fixed to the top plate of the outer shell; the column cover plate rotates horizontally and slides left and right around the adjusting block.
[0003] The angle adjustment structure of the office chair armrest with the above structure uses the positioning block at the front end of the spring and the floating block to hold against for positioning, and has the following deficiencies: 1. Since the racks at both ends of the floating block for positioning are straight racks, after the angle is rotated, the armrest and the floating block are not parallel, and there is a certain angle between the two, resulting in that the positioning block at the front end of the spring and the notch of the rack are not on the same straight line, that is, the side surface of the positioning block and the notch positioning are not aligned, and relying on the side surfaces to abut against each other will result in insufficient positioning force between the two. 2. When the spring expands and contracts, it lacks directivity, so that the acting force of the elastic force cannot all act on the floating block, and finally the positioning of the armrest after the angle adjustment is unevenly stressed. Utility Model Content
[0004] The technical problem to be solved by the present utility model is to provide an adjustable quick-release armrest that uses an elastic reset block to replace a conventional spring, adopts an arc-shaped rack on the side surface of the middle rotating base, so as to be more in line with the positioning during angle adjustment, can be completely aligned at any angle positioning, and has better structural reliability.
[0005] The technical solution of the present utility model is to provide an adjustable quick-release armrest with the following structure, including a decorative panel, an upper cover plate, a lower cover plate, a column, a connecting seat and a quick-release connector; the upper cover plate and the lower cover plate form an armrest base; the armrest base is connected to the top of the column, the connecting seat and the quick-release connector are installed at the bottom of the column, the decorative panel is fixed on the top of the armrest base, the top of the column is provided with a column cover plate and internally provided with a height adjustment mechanism, and the armrest base is internally provided with a front-back adjustment structure and an angle adjustment structure, and is characterized in that: the angle adjustment structure includes a rotating base, at least one set of positioning block and elastic reset block combination; the rotating base and all one set of positioning block and elastic reset block combination are located inside the armrest base, the rotating base passes through the lower cover plate and is fixed to the column cover plate, the rotating base, one set of positioning block and elastic reset block combination are at the same height, at least one arc-shaped rack is provided on the outer wall of the rotating base, one end of each positioning block is embedded in one of the notches of the arc-shaped rack and the other end abuts against the outer wall of the elastic reset block, the elastic reset block is embedded in an annular cavity of the lower cover plate, and the side wall of the elastic reset block abuts against the side wall of the annular cavity after being squeezed by the positioning block.
[0006] In the angle adjustment state, the armrest base is rotated by an external force, so that the side wall of the notch of the arc-shaped rack squeezes the positioning block to move towards the elastic reset block and squeezes the elastic reset block until the positioning block enters the notch of the adjacent arc-shaped rack, and the elastic reset block resets and pushes the positioning block to be embedded.
[0007] One set of arc-shaped racks are provided on the outer wall of the rotating base in both the front end direction and the rear end direction of the armrest, and the corresponding positioning block and elastic reset block combinations are two sets, which are respectively matched and embedded with one set of arc-shaped racks at the same position.
[0008] A partition is provided at the position of the lower cover plate between the rotating base and the elastic reset block. A channel is provided on the partition, and the positioning block is slidably connected in the channel.
[0009] A groove is provided at the front end of the elastic reset block, and one end of the positioning block is embedded in the groove.
[0010] A front-back adjustment slider is provided inside the lower cover plate. The lower cover plate is slidably connected back and forth with the front-back adjustment slider as a reference, and a positioning device is provided; the positioning block and elastic reset block combinations at the front end and the rear end are both located inside the front-back adjustment slider; when the armrest base rotates, it drives the front-back adjustment slider and the two groups of positioning block and elastic reset block combinations to rotate together.
[0011] The elastic reset block is trapezoidal. The positioning block and elastic reset block combinations at the front end and the rear end are axially symmetrically arranged. The short side of the elastic reset block faces the rotating base, and the groove is located on the short side of the elastic reset block.
[0012] The height adjustment mechanism includes a positioning rod, an inner tube and an outer tube. The positioning rod is fixed to the column cover plate and the outer tube. The inner tube is fixed to the connecting seat and is provided with positioning holes arranged vertically at the top. The top of the positioning rod is provided with a bent positioning hook, and the positioning hook is embedded in one of the positioning holes to achieve vertical positioning.
[0013] The positioning rod is a lever, and the top is resisted by a spring, so that the positioning hook is embedded in the positioning hole.
[0014] After adopting the above structure, the utility model has the following advantages: 1. This structure uses an elastic reset block to replace a conventional spring. The elastic reset block is embedded in an annular cavity of the lower cover plate. After being squeezed by the positioning block, the side wall of the elastic reset block abuts against the side wall of the annular cavity, and then the reset characteristic of the elastic reset block is used to push the positioning block in the opposite direction to be embedded with the arc-shaped rack to achieve circumferential angular positioning; this structure has good reliability and is simple in structure. 2. An elastic reset block is adopted. After being squeezed, it can push the positioning block in the opposite direction of the squeezing direction, and the two are always in a close state. The directionality of the action force and the reaction force is good, the reliability is good, and the positioning force between the positioning block and the rotating base can be ensured.
[0015] As an improvement, when adjusting the angle, the armrest base is rotated by an external force, so that the side wall of the notch of the arc-shaped rack squeezes the positioning block to move towards the elastic reset block and squeezes the elastic reset block until the positioning block enters the notch of the adjacent arc-shaped rack. The elastic reset block resets and pushes the positioning block to be embedded, with good reliability and guaranteed elastic force.
[0016] As an improvement, a set of arc-shaped racks are provided on the outer wall of the rotating base in both the front-end direction and the rear-end direction of the armrest. Correspondingly, the positioning blocks and the elastic reset blocks are combined into two groups, which are respectively fitted and embedded with a set of arc-shaped racks at the same position, so as to balance the forces at the front end and the rear end.
[0017] As an improvement, a partition is provided at the position of the lower cover plate between the rotating base and the elastic reset block. A channel is provided on the partition, and the positioning block is slidably connected in the channel to ensure that the positioning block slides in a straight line.
[0018] As an improvement, a groove is provided at the front end of the elastic reset block, and one end of the positioning block is embedded in the groove to determine the positioning position of the positioning block and the elastic reset block.
[0019] As an improvement, a front-back adjustment slider is provided in the lower cover plate. The lower cover plate is slidably connected back and forth with the front-back adjustment slider as a reference, and a positioning device is provided; the positioning blocks and the elastic reset block combinations at the front end and the rear end are both located in the front-back adjustment slider; when the armrest base rotates, it drives the front-back adjustment slider and the two groups of positioning blocks and elastic reset block combinations to rotate together, and this structure is convenient for adjustment.
[0020] As an improvement, the elastic reset block is trapezoidal. The positioning blocks and the elastic reset blocks at the front end and the rear end are axially symmetrically arranged. The short side of the elastic reset block faces the rotating base, and the groove is located on the short side of the elastic reset block, further increasing the elastic force of the elastic reset block.
[0021] As an improvement, the height adjustment mechanism includes a positioning rod, an inner tube and an outer tube. The positioning rod is fixed to the column cover plate and the outer tube. The inner tube is fixed to the connecting seat and a positioning hole is provided at the top along the up-and-down arrangement. The top of the positioning rod is provided with a bent positioning hook, and the positioning hook is embedded in one of the positioning holes to achieve up-and-down positioning, and the adjustment range is wide. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a perspective view of the adjustable quick-release armrest of the present utility model.
[0023] Figure 2 is an exploded view of the adjustable quick-release armrest of the present utility model.
[0024] Figure 3 is an internal schematic view of the adjustable quick-release armrest of the present utility model.
[0025] Figure 4 is an exploded schematic view of the armrest base of the adjustable quick-release armrest of the present utility model.
[0026] Figure 5 is an exploded view of the angle adjustment structure of the present utility model.
[0027] Figure 6 This is a schematic diagram of the installation of the angle adjustment structure of the utility model.
[0028] Figure 7 This is a schematic diagram of the installation of the angle adjustment structure of the utility model.
[0029] As shown in the figure:
[0030] 1. Decorative panel, 2. Upper cover, 3. Lower cover, 4. Post, 5. Connecting seat, 6. Quick-release connector, 7. Handrail base, 8. Post cover, 9. Rotating base, 10. Positioning block, 11. Elastic reset block, 12. Arc rack, 13. Partition, 14. Channel, 15. Groove, 16. Positioning rod, 17. Inner tube, 18. Outer tube, 19. Front and rear adjustment slider. DETAILED DESCRIPTION
[0031] The utility model will be further described below in conjunction with the accompanying drawings.
[0032] like Figure 1-7 As shown, the adjustable quick-release armrest of the utility model comprises a decorative panel 1, an upper cover plate 2, a lower cover plate 3, a column 4, a connecting seat 5 and a quick-release connecting head 6.
[0033] The upper cover plate 2 and the lower cover plate 3 form an armrest base 7; the armrest base 7 is connected to the top of the column 4, the connecting seat 5 and the quick-release connector 6 are installed at the bottom of the column 4, and the decorative panel 1 is fixed to the top of the armrest base 7.
[0034] like Figure 2 As shown, the column 4 is provided with a column cover plate 8 on the top and a height adjustment mechanism inside. The height adjustment mechanism includes a positioning rod 16, an inner tube 17 and an outer tube 18. The positioning rod 16 is fixed to the column cover plate 8 and the outer tube 18. The inner tube 17 is fixed to the connecting seat 5 and is provided with positioning holes arranged in an up-and-down manner on the top. The top of the positioning rod 16 is provided with a bent positioning hook, and the positioning hook is embedded in one of the positioning holes to achieve up-and-down positioning. The positioning rod 16 is a lever, and the top is supported by a spring so that the positioning hook is embedded in the positioning hole; the positioning hook can be adjusted up and down by squeezing the spring through the adjustment switch to disengage the positioning hook from the positioning hole, and then the outer tube 18 can be adjusted up and down according to the needs, so that the positioning hook is embedded in a corresponding positioning hole, and the adjustment switch is released to position the positioning hook in the positioning hole through the spring.
[0035] The armrest base 7 is provided with a front-back adjustment structure and an angle adjustment structure. The angle adjustment structure includes a rotary base 9, at least one set of positioning blocks 10 and an elastic reset block 11 combination. The rotary base 9, one set of positioning blocks 10 and the elastic reset block 11 combination are all located inside the armrest base 7. The rotary base 9 passes through the lower cover plate 3 and is fixed to the column cover plate 8. The rotary base 9, one set of positioning blocks 10 and the elastic reset block 11 combination are at the same height. At least one arc-shaped rack 12 is provided on the outer wall of the rotary base 9. One end of each positioning block 10 is embedded in one of the notches of the arc-shaped rack 12, and the other end abuts against the outer wall of the elastic reset block 11. The elastic reset block 11 is embedded in an annular cavity of the lower cover plate 3. After being squeezed by the positioning block 10, the side wall of the elastic reset block 11 abuts against the side wall of the annular cavity.
[0036] Principle of armrest angle adjustment: When adjusting the angle, the armrest base 7 is rotated by an external force, generally by swinging left and right, so that the side wall of the notch of the arc-shaped rack 12 squeezes the positioning block 10 to move towards the elastic reset block 11 and squeezes the elastic reset block 11 until the positioning block 10 enters the notch of the adjacent arc-shaped rack 12. The elastic reset block 11 resets and pushes the positioning block 10 to be embedded. The elastic reset block can be made of flexible materials such as rubber.
[0037] As Figure 4 、 Figure 5 and Figure 6 shown, a set of arc-shaped racks 12 are provided on the outer wall of the rotary base 9 in both the front end direction and the rear end direction of the armrest. The arc-shaped racks 12 are symmetric about the center of the rotary base 9 from left to right. The corresponding positioning blocks 10 and elastic reset block 11 combinations are two sets, which are respectively matched and embedded with a set of arc-shaped racks 12 at the same position.
[0038] As Figure 4 shown, a partition 13 is provided at the position between the rotary base 9 and the elastic reset block 11 on the lower cover plate 3. A channel 14 is provided on the partition 13. The positioning block 10 is slidably connected to the channel 14, so that the positioning block 10 always slides in a straight line, ensuring the sliding direction of the positioning block.
[0039] As Figure 5 shown, a groove 15 is provided at the front end of the elastic reset block 11. One end of the positioning block 10 is embedded in the groove 15, and the groove 15 is semicircular.
[0040] As Figure 4As shown, a front-back adjustment slider 19 is provided inside the lower cover plate 3. The lower cover plate 3 is slidably connected back and forth with the front-back adjustment slider 19 as a reference, and a positioning device is provided. The positioning blocks 10 and the elastic reset blocks 11 combinations located at the front end and the rear end are both located inside the front-back adjustment slider 19. When the armrest base 7 rotates, it drives the front-back adjustment slider 19 and the two groups of positioning blocks 10 and elastic reset blocks 11 combinations to rotate together.
[0041] As Figure 5 shown, the elastic reset block 11 is trapezoidal. The positioning blocks 10 and the elastic reset blocks 11 located at the front end and the rear end are axially symmetrically arranged. The short side of the elastic reset block 11 faces the rotary base 9, and the groove 15 is located on the short side of the elastic reset block 11.
Claims
1. An adjustable quick-release armrest, comprising a decorative panel (1), an upper cover plate (2), a lower cover plate (3), a column (4), a connecting seat (5) and a quick-release connector (6); the upper cover plate (2) and the lower cover plate (3) form an armrest base (7); the armrest base (7) is connected to the top of the column (4), the connecting seat (5) and the quick-release connector (6) are installed at the bottom of the column (4), the decorative panel (1) is fixed to the top of the armrest base (7), the top of the column (4) is provided with a column cover plate (8), a height adjustment mechanism is provided inside the column, and a front-rear adjustment structure and an angle adjustment structure are provided inside the armrest base (7), characterized in that: The angle adjustment structure comprises a rotating base (9), at least one group of positioning blocks (10) and an elastic reset block (11); the rotating base (9), the group of positioning blocks (10) and the elastic reset block (11) are all located inside the handrail base (7); the rotating base (9) passes through the lower cover plate (3) and is fixed to the column cover plate (8); the rotating base (9) and all the groups of positioning blocks (10) and the elastic reset block (11) are located at the same height; the outer wall of the rotating base (9) is provided with at least one arc-shaped rack (12); one end of each positioning block (10) is embedded in one of the notches of the arc-shaped rack (12) and the other end is against the outer wall of the elastic reset block (11); the elastic reset block (11) is embedded in an annular cavity of the lower cover plate (3); and the side wall of the elastic reset block (11) is pressed by the positioning block (10) so that the side wall is against the side wall of the annular cavity.
2. The adjustable quick-release armrest according to claim 1, characterized in that: In the angle adjustment state, the armrest base (7) is rotated by external force, so that the side wall of the notch of the arc-shaped rack (12) squeezes the positioning block (10) to move toward the elastic reset block (11) and squeeze the elastic reset block (11) until the positioning block (10) enters the notch of the adjacent arc-shaped rack (12), and the elastic reset block (11) is reset and pushes the positioning block (10) to be embedded.
3. The adjustable quick-release armrest according to claim 1, characterized in that: The outer wall of the rotating base (9) is provided with a group of arc-shaped racks (12) in the front and rear directions of the handrail, and the corresponding positioning blocks (10) and elastic reset blocks (11) are combined into two groups, which are respectively matched and embedded with a group of arc-shaped racks (12) at the same position.
4. The adjustable quick-release armrest according to claim 1, characterized in that: The lower cover plate (3) is provided with a partition plate (13) at a position between the rotating base (9) and the elastic reset block (11), the partition plate (13) is provided with a channel (14), and the positioning block (10) is slidably connected to the channel (14).
5. The adjustable quick-release armrest according to claim 1, characterized in that: A groove (15) is provided at the front end of the elastic reset block (11), and an end portion of one end of the positioning block (10) is embedded in the groove (15).
6. The adjustable quick-release armrest according to claim 3, characterized in that: A front-rear adjustment slider (19) is provided in the lower cover (3), and the lower cover (3) is connected to the front-rear adjustment slider (19) by sliding forward and backward with the front-rear adjustment slider (19) as a reference, and is provided with a positioning device; the positioning block (10) and the elastic reset block (11) combination located at the front and rear ends are both located in the front-rear adjustment slider (19); when the armrest base (7) rotates, the front-rear adjustment slider (19) and the two groups of positioning blocks (10) and the elastic reset block (11) combination are driven to rotate together.
7. The adjustable quick-release armrest according to claim 5, characterized in that: The elastic reset block (11) is trapezoidal in shape, the positioning blocks (10) and the elastic reset block (11) located at the front and rear ends are axially symmetrically arranged, the short side of the elastic reset block (11) faces the rotating base (9), and the groove (15) is located on the short side of the elastic reset block (11).
8. The adjustable quick-release armrest according to claim 1, characterized in that: The height adjustment mechanism comprises a positioning rod (16), an inner tube (17) and an outer tube (18); the positioning rod (16) is fixed to the column cover plate (8) and the outer tube (18); the inner tube (17) is fixed to the connecting seat (5) and has positioning holes arranged in an up-and-down arrangement on the top; a bent positioning hook is provided on the top of the positioning rod (16); the positioning hook is embedded in one of the positioning holes to achieve up-and-down positioning.
9. The adjustable quick-release armrest according to claim 8, characterized in that: The positioning rod (16) is a lever, the top of which is supported by a spring so that the positioning hook is embedded in the positioning hole.