Seat armrest omni-directional rotating mechanism and adjustable seat armrest

Abstract

The utility model belongs to the technical field of office furniture, and particularly relates to a seat armrest omnidirectional rotating mechanism and an adjustable seat armrest, the seat armrest omnidirectional rotating mechanism comprises an armrest supporting rod and an armrest base rotationally connected to the end part of the armrest supporting rod, and the end part, provided with a positioning rotating wheel, of the armrest supporting rod is arranged in the armrest base in a penetrating manner; a transmission shifting rod capable of swinging is hinged in the handrail base, the swinging side of the transmission shifting rod abuts against a locking sliding plate sliding in the transverse direction, and the locking sliding plate is connected with the positioning rotating wheel in a clamped mode at the locking position of the transmission shifting rod. A switch handle sliding in the longitudinal direction is arranged in the handrail base and eccentrically drives the transmission shifting rod to swing. A transmission shifting rod capable of swinging is arranged in the handrail base and connected with a manually-controlled switch handle, and after swinging, the locking sliding plate can be shifted through the swinging end to be connected with the positioning rotating wheel in a clamped mode, so that the steering angle of the handrail is fixed.

Description

Technical Field

[0001] This utility model belongs to the field of office furniture technology, specifically relating to an omnidirectional rotating mechanism for a chair armrest and an adjustable chair armrest. Background Technology

[0002] The design of chair armrests can vary depending on the type of chair, such as office chairs, sofas, and car seats. Chair armrests can be fixed or adjustable. Office chairs are often equipped with rotatable and height-adjustable armrests to improve the practicality and comfort of the chair.

[0003] The chair armrest disclosed in patent CN210493376U has a rotation and multi-directional movement function, including a bracket and an armrest body. A rotating seat is rotatably connected to the top of the bracket. The rotating seat is equipped with a rotation control component for controlling the rotation of the rotating seat. The armrest body is slidably mounted on the rotating seat. The armrest body is equipped with a displacement control component for controlling the movement of the armrest body. This utility model has a novel structural design. The rotation control component can control the rotation of the armrest body, and the displacement control component can control the lateral movement, longitudinal movement, or simultaneous lateral and longitudinal movement of the armrest body. Thus, the position and angle of the armrest body can be adjusted according to the user's needs to meet the needs of people of different body types, so as to provide users with better comfort and good practicality.

[0004] In the above solution, the rotation angle positioning of the armrest requires the rotating buckle to cooperate with the rotating locking seat under the action of the spring. However, when the spring force of the rotating buckle weakens or fails, the rotating buckle lacks the continuous thrust to cooperate with the rotating locking seat. The positioning lock block will not be able to form a reliable engagement with the locking groove, resulting in the problem that the seat armrest cannot be fixed when adjusting the turning angle. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a seat armrest omnidirectional rotation mechanism and an adjustable seat armrest that can solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The omnidirectional rotating mechanism of the seat armrest includes an armrest support rod and an armrest base rotatably connected to the end of the armrest support rod. The end of the armrest support rod with a positioning wheel passes through the armrest base. A swingable transmission lever is hinged in the armrest base. The swinging side of the transmission lever abuts against a locking slide plate that slides laterally. The locking slide plate engages with the positioning wheel at the locking position of the transmission lever. A longitudinally sliding switch handle is provided in the armrest base to eccentrically drive the transmission lever to swing.

[0008] In the aforementioned omnidirectional rotating mechanism of the seat armrest, the transmission lever has a transmission groove that is not perpendicular to the longitudinal direction and does not pass through the hinge point, and the switch handle is provided with a transmission column that moves longitudinally with the switch handle, and the transmission column slides in the transmission groove.

[0009] In the omnidirectional rotating mechanism of the seat armrest, when the transmission lever is in the locked position, the transmission column, the hinge point, the transmission lever, and the locking slide abutment point are all on the same straight line.

[0010] In the omnidirectional rotating mechanism of the seat armrest, when the transmission lever is in the unlocked position, the transmission column, the hinge point, and the point where the transmission lever abuts against the locking slide are not on the same straight line.

[0011] In the omnidirectional rotating mechanism of the seat armrest, the positioning wheel is provided with several positioning slots in the circumferential direction, and the locking slide is provided with positioning blocks that are adapted to the positioning slots. When the transmission lever is in the locked position, the positioning blocks engage with one of the positioning slots in the lateral direction.

[0012] In the omnidirectional rotating mechanism of the seat armrest, the positioning wheel is provided with several rotation limiting slots in the circumferential direction, and the armrest base is provided with a rotation limiting elastic block that abuts against the rotation limiting slots, and can slide and jump in each of the rotation limiting slots by elastic force.

[0013] In the omnidirectional rotation mechanism of the seat armrest, the switch handle is provided with a reset elastic element connected to the armrest base. The reset elastic element pushes the switch handle longitudinally to keep the transmission lever in the locked position.

[0014] In the omnidirectional rotating mechanism of the seat armrest, an adjustment lever is provided on the switch handle, and the adjustment lever extends from the lower end of the front side of the armrest base.

[0015] This utility model also provides an adjustable seat armrest, which includes the aforementioned omnidirectional rotation mechanism for the seat armrest.

[0016] In the adjustable seat armrest, a horizontal adjustment slide plate that slides longitudinally is provided in the armrest base. The positioning wheel is rotatably connected to the horizontal adjustment slide plate. A translation limit elastic block is provided laterally on the horizontal adjustment slide plate. The translation limit elastic block slides and jumps between several translation limit slots provided on the armrest base through elastic sliding.

[0017] The advantages of this utility model are:

[0018] The armrest base is equipped with a swingable transmission lever, which connects to a manually controlled switch handle. After swinging, the locking slide can be engaged with the positioning wheel by swinging the lever, thus fixing the armrest's turning angle. The transmission lever converts the longitudinal kinetic energy of the switch handle into the lateral displacement of the locking slide. Even if the elastic reset component of the switch handle fails, the locking effect of the locking slide on the positioning wheel will not be affected, making the armrest angle more reliably fixed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the handrail structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the armrest base structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the transmission connection of the transmission lever of this utility model.

[0022] Figure 4 This is a schematic diagram of the horizontally adjustable sliding plate structure of this utility model.

[0023] Figure 5 This is a schematic diagram of the positioning wheel structure of this utility model.

[0024] Figure 6 This is a schematic diagram of the unlocking position of this utility model.

[0025] Figure 7 This is a schematic diagram of the locking position of this utility model.

[0026] In the diagram, the components are: handrail support rod 1, positioning wheel 11, positioning slot 12, rotation limit slot 13, rotation limit elastic block 14, reset elastic element 15, translation limit slot 16, handrail base 2, transmission lever 3, transmission slide 31, locking slide plate 4, positioning block 41, switch handle 5, transmission column 51, adjusting lever 52, horizontal adjusting slide plate 6, translation limit elastic block 61, longitudinal direction Y, and transverse direction X. Detailed Implementation

[0027] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0028] Example 1

[0029] like Figures 1-7As shown, the chair armrest omnidirectional rotation mechanism includes an armrest support rod 1 and an armrest base 2 rotatably connected to the end of the armrest support rod 1. The end of the armrest support rod 1 with a positioning wheel 11 passes through the armrest base 2. A swingable transmission lever 3 is hinged in the armrest base 2. The swinging side of the transmission lever 3 abuts against a locking slide plate 4 that slides in the transverse direction X. The locking slide plate 4 is engaged with the positioning wheel 11 in the locked position of the transmission lever 3. A switch handle 5 that slides in the longitudinal direction Y is provided in the armrest base 2 to eccentrically drive the transmission lever 3 to swing.

[0030] Specifically, the armrest base is equipped with a swingable transmission lever 3, which is connected to the manually controlled switch handle 5. After swinging, the locking slide plate 4 can be engaged with the positioning wheel 11 by the swinging end, thereby fixing the steering angle of the armrest. The transmission lever 3 can convert the longitudinal kinetic energy of the switch handle 5 into the lateral displacement of the locking slide plate 4. Even if the elastic reset element of the switch handle 5 fails to function, it will not affect the locking effect of the locking slide plate 4 on the positioning wheel 11, making the angle fixation of the armrest more reliable.

[0031] In this embodiment, the transmission lever 3 has a transmission groove 31 that is not perpendicular to the longitudinal direction Y and does not pass through the hinge point. The switch handle 5 is provided with a transmission column 51 that moves along the longitudinal direction Y with the switch handle 5. The transmission column 51 slides in the transmission groove 31.

[0032] The transmission groove 31 and the transmission lever 3 are at a certain angle along their length. When the transmission column 51 moves in the longitudinal Y direction with the switch handle 5, the transmission column 51 applies a longitudinal Y thrust to the groove wall of the transmission groove 31, causing the transmission lever 3 to swing around the hinge point and thus move the locking slide plate 4.

[0033] In this embodiment, when the transmission lever 3 is in the locked position, the transmission column 51, the hinge point, and the abutment point of the transmission lever 3 and the locking slide plate 4 are on the same straight line.

[0034] The transmission column 51 moves to one end of the transmission slide 31. At this time, the transmission column 51, the hinge point, and the contact point between the transmission lever 3 and the locking slide 4 are in a straight line. The length direction of the transmission lever 3 is parallel to the longitudinal direction Y. The swing side of the transmission lever 3 moves the locking slide 4 along the transverse direction X and forms a transverse X-locking and fixing handrail with the positioning wheel 11.

[0035] In this embodiment, when the transmission lever 3 is in the unlocked position, the transmission column 51, the hinge point, and the point where the transmission lever 3 abuts against the locking slide plate 4 are not on the same straight line.

[0036] The transmission column 51 moves to the other end of the transmission slide 31. At this time, the three points of the transmission column 51, the hinge point, and the contact point between the transmission lever 3 and the locking slide plate 4 are distributed in a triangle. The length direction of the transmission lever 3 forms an acute angle with the longitudinal direction Y. The swing side of the transmission lever 3 moves the locking slide plate 4 along the transverse direction X to disengage from the positioning wheel 11, so that the handrail is in a state of free rotation.

[0037] In this embodiment, the positioning wheel 11 is provided with a plurality of positioning slots 12 in the circumferential direction, and the locking slide plate 4 is provided with a positioning block 41 that is adapted to the positioning slots 12. When the transmission lever 3 is in the locked position, the positioning block 41 engages with one of the positioning slots 12 in the transverse direction X.

[0038] The number of positioning slots 12 opened on the positioning wheel 11 determines the number of fixed rotation angles of the armrest, thus the adjustable range of the armrest is very free.

[0039] In this embodiment, the positioning wheel 11 is provided with several rotation limiting slots 13 in the circumferential direction, and the armrest base 2 is provided with a rotation limiting elastic block 14 that abuts against the rotation limiting slots 13, and can slide and jump in each rotation limiting slot 13 by elastic force.

[0040] A rotating limiting groove 13 with a continuous wave shape is provided on the edge of the positioning wheel 11. The rotating limiting elastic block 14 in the armrest base 2 abuts against the concave part of the groove. When the armrest rotates, the rotating limiting elastic block 14 slides against the concave and convex groove, adding a certain positioning damping to the rotation process of the armrest.

[0041] When the bottom of the rotating limiting slot 13 is opened, it will be aligned with the positioning slot 12, so that when the rotating limiting elastic block 14 falls into one of the rotating limiting slots 13, the positioning slot 12 can also be aligned with the movement stroke of the positioning block 41.

[0042] In this embodiment, the switch handle 5 is provided with a reset elastic element 15 connected to the armrest base 2. The reset elastic element 15 pushes the switch handle 5 longitudinally Y to keep the transmission lever 3 in the locked position.

[0043] To ensure reliability, a spring is used to keep the switch handle 5 in the locked position, which improves the reliability of the handrail after positioning.

[0044] Typically, where space allows in the handrail structure, the transmission groove 31 on the transmission lever 3 is positioned further away from the hinge point. This makes the lever arm of the transmission groove 31 driving the transmission lever 3 greater than the lever arm of the locking slide plate 4 to the hinge point. This reduces the force required to pull the switch handle 5 and increases the difficulty for the locking slide plate 4 to unlock itself against the reset elastic element 15, thereby achieving a self-locking effect.

[0045] In this embodiment, an adjustment lever 52 is provided on the switch handle 5, and the adjustment lever 52 extends from the lower end of the front side of the armrest base 2.

[0046] The adjustment lever 52 extends from the lower side of the front end of the armrest. When the arm is resting normally on the armrest, the fingers can just touch the adjustment lever 52. By flicking the adjustment lever 52 outward with the fingers, the armrest can be put into a free adjustment state. After reaching the desired angle, releasing the adjustment lever 52 will fix the armrest back in place.

[0047] Example 2

[0048] like Figure 1 and Figure 4 As shown, the omnidirectional rotation mechanism of the seat armrest in Embodiment 1 is applied to the adjustable seat armrest, which, together with the horizontal adjustment of the armrest, makes the armrest more adaptable.

[0049] In this embodiment, the armrest base 2 is provided with a horizontal adjustment slide plate 6 that slides along the longitudinal direction Y. The positioning wheel 11 is rotatably connected to the horizontal adjustment slide plate 6. A translation limit elastic block 61 is provided on the horizontal adjustment slide plate 6 in the transverse direction X. The translation limit elastic block 61 slides and jumps between several translation limit slots 16 provided on the armrest base 2 through elasticity.

[0050] Although the positioning wheel 11 is rotatably connected to the horizontal adjustment slide plate 6, it cannot move axially. The handrail support rod 1 is completely movably connected to the handrail base 2 through the horizontal adjustment slide plate 6. When the horizontal adjustment slide plate 6 moves relative to the handrail base 2, the degree of forward protrusion of the handrail can be changed. The cooperation between the elastic block 61 and the translation limit slot 16 allows the handrail to be fixed in a certain position during adjustment.

[0051] Among them, the reset elastic element 15, the rotation limit elastic block 14, and the translation limit elastic block 61 are all connected by springs.

[0052] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A seat armrest omnidirectional rotation mechanism, comprising an armrest support rod (1) and an armrest base (2) rotatably connected to the end of the armrest support rod (1), characterized in that, The end of the handrail support rod (1) with a positioning wheel (11) passes through the handrail base (2). The handrail base (2) is hinged with a swingable transmission lever (3). The swing side of the transmission lever (3) abuts against a locking slide plate (4) that slides in the transverse direction (X). The locking slide plate (4) engages with the positioning wheel (11) in the locking position of the transmission lever (3). The handrail base (2) is provided with a switch handle (5) that slides in the longitudinal direction (Y) to eccentrically drive the transmission lever (3) to swing.

2. The omnidirectional rotating mechanism for the seat armrest according to claim 1, characterized in that, The transmission lever (3) has a transmission groove (31) that is not perpendicular to the longitudinal direction (Y) and does not pass through the hinge point. The switch handle (5) is provided with a transmission column (51) that moves along the longitudinal direction (Y) with the switch handle (5). The transmission column (51) slides in the transmission groove (31).

3. The omnidirectional rotating mechanism for the seat armrest according to claim 2, characterized in that, When the transmission lever (3) is in the locked position, the transmission column (51), the hinge point, and the abutment point of the transmission lever (3) and the locking slide plate (4) are on the same straight line.

4. The omnidirectional rotating mechanism for the seat armrest according to claim 2, characterized in that, When the transmission lever (3) is in the unlocked position, the transmission column (51), the hinge point, and the abutment point of the transmission lever (3) and the locking slide plate (4) are not on the same straight line.

5. The omnidirectional rotating mechanism for the armrest of a seat according to claim 1, characterized in that, The positioning wheel (11) has several positioning slots (12) circumferentially open. The locking slide plate (4) is provided with a positioning block (41) that is compatible with the positioning slot (12). When the transmission lever (3) is in the locked position, the positioning block (41) engages with one of the positioning slots (12) in the transverse direction (X).

6. The omnidirectional rotating mechanism for the seat armrest according to claim 1, characterized in that, The positioning wheel (11) has several rotation limiting slots (13) circumferentially open. The armrest base (2) is provided with a rotation limiting elastic block (14) that abuts against the rotation limiting slots (13), and can slide and jump in each of the rotation limiting slots (13) by elastic force.

7. The omnidirectional rotating mechanism for the seat armrest according to claim 1, characterized in that, The switch handle (5) is provided with a reset elastic element (15) connected to the armrest base (2). The reset elastic element (15) pushes the switch handle (5) longitudinally (Y) to keep the transmission lever (3) in the locked position.

8. The omnidirectional rotating mechanism for the armrest of a seat according to claim 1, characterized in that, An adjustment lever (52) is provided on the switch handle (5), and the adjustment lever (52) extends from the lower end of the front side of the armrest base (2).

9. Adjustable seat armrests, characterized in that, The adjustable seat armrest includes the omnidirectional rotation mechanism of the seat armrest as described in any one of claims 1-8.

10. The adjustable seat armrest according to claim 9, characterized in that, The armrest base (2) is provided with a horizontal adjustment slide plate (6) that slides longitudinally (Y). The positioning wheel (11) is rotatably connected to the horizontal adjustment slide plate (6). A translation limit elastic block (61) is provided in the horizontal direction (X) on the horizontal adjustment slide plate (6). The translation limit elastic block (61) slides and jumps between several translation limit slots (16) provided on the armrest base (2) by elasticity.

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