Multi-directional adjustment of handrails

Abstract

The application discloses a multidirectional adjusting handrail, which comprises a handrail support, a base, an eccentric wheel, a bottom plate, a positioning plate and a handrail shell, the base is arranged on the handrail support, the eccentric wheel is pivotally connected to the base in a swingable mode, a containing groove is formed in the bottom of the bottom plate, a sliding positioning groove is arranged on the surface of the bottom plate, the eccentric wheel is movably arranged in the containing groove, the positioning plate is movably arranged in the sliding positioning groove, the connecting shaft of the eccentric wheel penetrates through the surface of the bottom plate and is pivotally connected with the positioning plate, and the handrail shell is fixed with the bottom plate and covers the eccentric wheel and the positioning plate. The multidirectional adjusting handrail can be adjusted in the front-back direction, the rotating direction and the left-right direction.

Description

Technical Field

[0001] This invention relates to a seat, and more particularly to a multi-directional adjustable armrest. Background Technology

[0002] Chairs are seating furniture used for office work, meetings, study, and leisure. Modern chairs are multifunctional and widely used in offices, conference rooms, hotels, and homes. Most existing chairs have fixed armrests. However, fixed armrests cannot meet the diverse needs of users with different body types and sitting postures. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-directional adjustable handrail that can be adjusted forward and backward, rotated, and left and right.

[0004] To achieve the above objectives, the present invention provides a multi-directional adjustable handrail comprising a handrail bracket, a base, an eccentric wheel, a bottom plate, a positioning plate, and a handrail housing. The base is disposed on the handrail bracket, the eccentric wheel is pivotally connected to the base, the bottom of the bottom plate has an accommodating groove, the surface of the bottom plate has a sliding positioning groove, the eccentric wheel is movably disposed in the accommodating groove, the positioning plate is slidably disposed in the sliding positioning groove, the connecting shaft of the eccentric wheel passes through the surface of the bottom plate and is pivotally connected to the positioning plate, and the handrail housing is fixed to the bottom plate and covers the eccentric wheel and the positioning plate.

[0005] Compared with the prior art, this invention utilizes a sliding positioning groove on the base plate, in which a positioning plate is slidably positioned. This allows the positioning plate to slide and adjust relative to the base plate in the front-back direction, thereby achieving front-back adjustment of the base plate. Furthermore, by providing an eccentric wheel movably positioned within a receiving groove on the base plate and pivotally connected to the base, the eccentric wheel drives the base plate to rotate, achieving angle adjustment. Additionally, due to the eccentric structure of the eccentric wheel, when the eccentric wheel drives the base plate to swing at a certain angle and then swings the base plate in the opposite direction, the base plate shifts to the left or right relative to its original position, achieving left-right adjustment. Therefore, this invention's multi-directional adjustable armrest can achieve front-back, rotation, and left-right adjustments, suitable for people of different body types and sitting postures, offering excellent adaptability, simple adjustment, and convenient use.

[0006] Preferably, the base includes a fixed seat and an eccentric wheel seat, the fixed seat is disposed on the handrail bracket, the eccentric wheel seat is fixed on the fixed seat, and the eccentric wheel is disposed on the eccentric wheel seat.

[0007] Specifically, the eccentric wheel seat is provided with a pivot hole and an arc-shaped guide groove. One end of the eccentric wheel is provided with a pivot shaft, which is connected to the pivot hole to achieve pivot connection. The eccentric wheel is provided with a guide post, which is slidably inserted into the arc-shaped guide groove. The arc-shaped guide groove can both guide the swing of the eccentric wheel and limit the swing angle of the eccentric wheel to prevent excessive swing and dislocation.

[0008] Preferably, the eccentric wheel has a teardrop-shaped structure.

[0009] Preferably, the width of the eccentric wheel has a gradually decreasing structure.

[0010] Preferably, the sliding positioning groove has a plurality of positioning teeth on both sides along its length, and the positioning plate has elastic portions on both sides, with engaging teeth on the elastic portions that selectively engage with the positioning teeth. By providing the positioning teeth and the engaging teeth, the sliding positioning groove and the positioning plate can be securely engaged and positioned, and the elastic portions allow the engaging teeth to quickly engage or disengage, making adjustment convenient and quick.

[0011] Preferably, the multi-directional adjustable armrest further includes a reinforcing plate, which is fixedly connected to the positioning plate. The reinforcing plate strengthens the positioning plate and extends its service life.

[0012] Specifically, the surface of the positioning plate is recessed, and the sidewall of the recess has a protrusion. The edge of the reinforcing plate has a recess. The reinforcing plate is fixed to the recess, and the protrusion engages with the recess. This design allows the reinforcing plate to quickly engage and fix with the positioning plate, improving assembly speed.

[0013] Preferably, the base is slidably mounted on the armrest bracket. Attached Figure Description

[0014] Figure 1 This is an exploded view of the multi-directional adjustable armrest of the present invention.

[0015] Figure 2 This is a structural diagram of the positioning plate and reinforcing plate in the multi-directional adjustable armrest of the present invention.

[0016] Figure 3 This is a diagram showing the forward and backward adjustment of the multi-directional adjustable armrest of the present invention.

[0017] Figure 4 This is a state diagram of the multi-directional adjustable armrest rotation adjustment of the present invention.

[0018] Figure 5 This is a diagram showing the left and right adjustment states of the multi-directional adjustable armrest of this invention. Detailed Implementation

[0019] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] like Figure 1 As shown, the multi-directional adjustable handrail 100 of the present invention includes a handrail bracket 1, a base 2, an eccentric wheel 3, a base plate 4, a positioning plate 5, a reinforcing plate 6, and a handrail shell. The base 2 is slidably mounted on the handrail bracket 1. The eccentric wheel 3 is pivotally connected to the base 2. The bottom of the base plate 4 has a receiving groove 41, and the surface of the base plate 4 has a sliding positioning groove 42. The eccentric wheel 3 is movably disposed in the receiving groove 41. The width of the eccentric wheel 3 gradually decreases, for example, the eccentric wheel 3 has a teardrop shape. The maximum width of the eccentric wheel 3 should be less than or equal to the width of the receiving groove 41. The positioning plate 5 is slidably disposed in the sliding positioning groove 42. The connecting shaft 31 of the eccentric wheel 3 passes through the surface of the base plate 4 and is pivotally connected to the positioning plate 5. The handrail shell is fixed to the base plate 4 and covers the eccentric wheel 3 and the positioning plate 5.

[0021] As shown in the figure Figure 1 and 2 As shown, the sliding positioning groove 42 has a plurality of positioning teeth 43 on both sides along its length direction, and the positioning plate 5 has elastic portions 51 on both sides. The elastic portions 51 have engaging teeth 52 that selectively engage with the positioning teeth 43. By setting the positioning teeth 43 and the engaging teeth 52, the sliding positioning groove 42 and the positioning plate 5 can be firmly engaged and positioned. Furthermore, the elastic portions 51 can be used to allow the engaging teeth 52 to quickly engage or disengage, making adjustment convenient and quick.

[0022] For example Figure 1 and Figure 2 The reinforcing plate 6 is fixedly connected to the positioning plate 5. The reinforcing plate 6 strengthens the positioning plate 5 and extends its service life. The positioning plate 5 has a recessed depression 53 on its surface, with a protrusion 54 on the sidewall of the recessed depression 53. The reinforcing plate 6 has a recess 61 on its edge. The reinforcing plate 6 is fixed to the recessed depression 53, and the protrusion 54 engages with the recess 61 for secure fixation. This design allows the reinforcing plate 6 to quickly engage and fix with the positioning plate 5, improving assembly speed.

[0023] Please see again Figure 1The base 2 includes a fixed seat 11 and an eccentric wheel seat 12. The fixed seat 11 is disposed on the armrest bracket 1, and the eccentric wheel seat 12 is fixed on the fixed seat 11. The eccentric wheel 3 is disposed on the eccentric wheel seat 12. The width of the eccentric wheel 3 gradually decreases, for example, the eccentric wheel 3 has a teardrop shape. The eccentric wheel seat 12 is provided with a pivot hole 12a and an arc-shaped guide groove 12b. The narrower end of the eccentric wheel 3 is provided with a pivot shaft 32, which is connected to the pivot hole 12a for pivot connection. The wider end of the eccentric wheel 3 is provided with a guide post 33. The guide post 33 and the connecting shaft 31 are respectively located on opposite sides of the eccentric wheel 3, and the guide post 33 and the connecting shaft 31 are coaxial. The guide post 33 is slidably inserted into the arc-shaped guide groove 12b. The arc-shaped guide groove 12b can both guide the swing of the eccentric wheel 3 and limit the swing angle of the eccentric wheel 3 to prevent excessive swing and dislocation.

[0024] In summary, the working principle of the multi-directional adjustable armrest 100 of the present invention will be described in detail below:

[0025] like Figure 3 As shown, when the armrest needs to be adjusted forward and backward, the base plate 4 is pushed, causing it to slide back and forth relative to the positioning plate 5 and the base 2. At this time, the elastic part 51 within the positioning plate 5 is compressed under the pushing force, causing the engaging tooth 52 to disengage from the positioning tooth 43. The positioning plate 5 and the base plate 4 are then released from their relative lock, allowing the base plate 4 to slide forward or backward. After the sliding adjustment, the base plate 4 stops moving. Then, the elastic part 51, under its own restoring force, causes the engaging tooth 52 to automatically engage with the corresponding positioning tooth 43. At this point, the base plate 4 and the positioning plate 5 are re-locked in place.

[0026] like Figure 4 As shown, when the angle of the handrail needs to be adjusted, simply swing the base plate 4, and the base plate 4 and the eccentric wheel 3 will rotate along the pivot shaft 32, thus achieving angle adjustment. The maximum angle of rotation is limited by the arc-shaped guide groove 12b.

[0027] like Figure 4 and Figure 5As shown, when the armrest needs to be adjusted left and right, firstly, the front end of the base plate 4 is swung, and the front end of the base plate 4 and the eccentric wheel 3 can rotate a certain angle along the pivot shaft 32, thus first adjusting the angle of the base plate 4. Secondly, due to the fact that the width of the eccentric wheel 3 is larger at one end and smaller at the other, after the angle of the base plate 4 is adjusted, there is a certain gap between the narrower end of the eccentric wheel 3 and the inner wall of the receiving groove 41 at the rear end of the base plate 4. At this time, the rear end of the base plate 4 is swung again, so that the inner wall of the receiving groove 41 at the rear end fits against the side wall of the narrower end of the eccentric wheel 3, thus making the front and rear ends of the base plate 4 back to a front-back orientation. At this time, the position of the base plate 4 is shifted outward relative to its original position. When it is necessary to shift the position of the base plate 4 inward relative to its original position, it is only necessary to adjust in the opposite direction, thus achieving the adjustment of the left and right directions of the armrest.

[0028] Compared with the prior art, this invention utilizes a sliding positioning groove 42 on the base plate 4, with the positioning plate 5 slidably positioned within the groove 42. This allows the positioning plate 5 to slide and adjust relative to the base plate 4 in the front-back direction, thereby achieving front-back adjustment of the base plate 4. Furthermore, by providing an eccentric wheel 3 movably positioned within the receiving groove 41 of the base plate 4 and pivotally connected to the base 2, the eccentric wheel 3 drives the base plate 4 to rotate, achieving angle adjustment of the base plate 4. Additionally, due to the eccentric structure of the eccentric wheel 3, when the eccentric wheel 3 drives the base plate 4 to swing at a certain angle and then swings in the opposite direction, the base plate 4 shifts to the left or right relative to its original position, achieving left-right adjustment. Therefore, the multi-directional adjustable armrest 100 of this invention can achieve front-back, rotation, and left-right adjustments, suitable for people of different body types and sitting postures, with excellent adaptability, simple adjustment, and convenient use.

[0029] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-directional adjustable armrest, characterized in that: The device includes an armrest support, a base, an eccentric wheel, a base plate, a positioning plate, and an armrest housing. The base is mounted on the armrest support, and the eccentric wheel is pivotally connected to the base. The base plate has a receiving groove at its bottom and a sliding positioning groove on its surface. The eccentric wheel is movably disposed within the receiving groove, and the positioning plate is slidably disposed within the sliding positioning groove. The eccentric wheel has a gradually decreasing width, and its narrower end has a pivot shaft for pivotal connection with the base. The wider end is provided with a connecting shaft. The connecting shaft of the eccentric wheel passes through the surface of the base plate and is pivotally connected to the positioning plate. The armrest shell is fixed to the base plate and covers the eccentric wheel and the positioning plate. When adjusting the armrest left and right, the front end of the base plate is first swung to adjust the angle, so that the narrower end of the eccentric wheel is separated from the inner wall of the receiving groove at the rear end of the base plate by a certain gap. Then the rear end of the base plate is swung to make the inner wall of the receiving groove at the rear end of the base plate fit against the side wall of the narrower end of the eccentric wheel.

2. The multi-directional adjustable armrest as described in claim 1, characterized in that: The base includes a fixed seat and an eccentric wheel seat. The fixed seat is disposed on the handrail bracket, the eccentric wheel seat is fixed on the fixed seat, and the eccentric wheel is disposed on the eccentric wheel seat.

3. The multi-directional adjustable armrest as described in claim 2, characterized in that: The eccentric wheel seat is provided with a pivot hole and an arc-shaped guide groove. One end of the eccentric wheel is provided with a pivot shaft, which is connected to the pivot hole to achieve pivot connection. The eccentric wheel is provided with a guide post, which is slidably inserted into the arc-shaped guide groove.

4. The multi-directional adjustable armrest as described in claim 1, characterized in that: The eccentric wheel has a teardrop-shaped structure.

5. The multi-directional adjustable armrest as described in claim 1, characterized in that: The sliding positioning groove has several positioning teeth on both sides along its own length direction, and the positioning plate has elastic parts on both sides, with engaging teeth on the elastic parts that selectively engage with the positioning teeth.

6. The multi-directional adjustable armrest as described in claim 1, characterized in that: The multi-directional adjustable handrail also includes a reinforcing plate, which is fixedly connected to the positioning plate.

7. The multi-directional adjustable armrest as described in claim 6, characterized in that: The surface of the positioning plate has a recessed depression, the sidewall of the recessed depression has a protrusion, the edge of the reinforcing plate has a recess, the reinforcing plate is fixed to the recessed depression, and the protrusion engages with the recess.

8. The multi-directional adjustable armrest as described in claim 1, characterized in that: The base is mounted on the armrest support in an adjustable up-and-down sliding manner.

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