Handrail capable of being rotationally adjusted

Abstract

The utility model discloses a rotatable and adjustable armrest which comprises an armrest main body, an armrest lower bracket, an armrest bracket rotationally connected with the armrest lower bracket, an armrest rod of which the bottom end is connected with the armrest bracket, and a cover plate connected with the armrest bracket in a buckling manner, the knob is rotationally connected with the handrail bracket and comprises a cylindrical connecting part, a cylindrical connecting part integrally formed with the cylindrical connecting part in an injection molding manner, and a manual control end integrally formed with the cylindrical connecting part in an injection molding manner; the design for conveniently changing the angle of the armrest is arranged on the seat armrest, the first ratchet teeth on the clamping teeth are separated from the second ratchet teeth on the tooth side plate by rotating the knob, the armrest rod can be rotated clockwise or anticlockwise, and the first ratchet teeth are meshed with the second ratchet teeth on the surface of the tooth side plate by reversely rotating the knob, so that the angle of the armrest can be changed. At the moment, the grab rail cannot rotate in the anticlockwise direction but can rotate in the clockwise direction, and the angles of the grab rail and the grab rail support can be adjusted easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of armrests, and in particular relates to an armrest that can be rotated and adjusted. Background Art

[0002] An armrest is a device that provides support and comfort. It has many types and is widely used. Seat armrests are one of them. Seat armrests are used on seats to provide support for the human body. On some high-end seats, seat armrests may have other functions, such as heating, storage, and massage.

[0003] Conventional chair armrests have a simple structure and a single function. The armrests are secured by hand screws. When the armrest angle needs to be changed, the hand screws need to be loosened or tightened, and the armrest angle adjustment process is relatively cumbersome. When the chair armrests are in use, there is a problem that there is no design that can conveniently change the armrest angle. For this reason, this application proposes a rotatable and adjustable armrest. Utility Model Content

[0004] The purpose of the present invention is to provide a rotatable and adjustable armrest to solve the problem in the background art that the chair armrest has no design for conveniently changing the angle of the armrest.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: a rotatable and adjustable armrest, comprising

[0006] The armrest body comprises an armrest lower support seat, an armrest bracket rotatably connected to the armrest lower support seat, an armrest rod connected to the armrest bracket at the bottom end, and a cover plate snap-connected to the armrest bracket;

[0007] A knob rotatably connected to the armrest bracket includes a cylindrical connecting portion, a cylindrical connecting portion integrally injection-molded with the cylindrical connecting portion, and a hand control end integrally injection-molded with the cylindrical connecting portion;

[0008] The locking assembly includes a gear, a locking tooth rotatably connected to the armrest bracket, and a reset spring installed inside the armrest bracket. The gear is penetrated by a first screw column, and a tooth edge plate is provided on the side of the gear.

[0009] Preferably, a supporting block with a semi-ellipsoidal structure is provided on the outer surface of the handrail bracket.

[0010] Preferably, a second screw column connected to the handrail bracket passes through the locking tooth, and an axial hole for the second screw column to pass through is opened on the surface of the locking tooth. Two groups of first ratchet teeth are provided on the surface of one end of the locking tooth, and the first ratchet teeth are in the shape of large and small sides.

[0011] Preferably, the end of the locking tooth away from the ratchet teeth is provided with a cross limiting block embedded in one end of the reset spring, and the surface of the locking tooth away from the cross limiting block is a non-planar sloped curved surface.

[0012] Preferably, sixteen groups of second ratchet teeth are provided on the surface of the tooth edge plate, and the second ratchet teeth are in the shape of large and small sides. A fixing hole for the first screw column to pass through is provided on the surface of the gear, and the center position of the surface of the gear is in an inward concave shape.

[0013] Preferably, the cross section of the cylindrical connecting portion is fan-shaped, and a fixed circular hole is provided in the middle of the cylindrical connecting portion. The hand control end passes through the cover plate, and the hand control end is in the shape of an eccentric elliptical cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] In the utility model, the seat armrest is designed to conveniently change the armrest angle. By rotating the knob, the first ratchet teeth on the locking teeth disengage from the second ratchet teeth on the tooth edge plate, and the armrest rod can be rotated clockwise or counterclockwise. By rotating the knob in the opposite direction, the first ratchet teeth and the second ratchet teeth on the surface of the tooth edge plate are engaged. At this time, the armrest rod cannot be rotated in the counterclockwise direction, but can be rotated in the clockwise direction, which is conducive to adjusting the angle of the armrest rod and the armrest bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the internal gear and the locking gear assembly of the handrail bracket of the utility model;

[0018] Figure 3 For the utility model Figure 2 Schematic diagram of the structure after the middle knob is rotated;

[0019] Figure 4 This is a schematic diagram of the main structure of the interior of the handrail bracket of the present invention;

[0020] Figure 5 This is a schematic diagram of the main structure of the locking tooth of the present utility model;

[0021] Figure 6 This is a schematic diagram of the main structure of the knob of the present invention;

[0022] Figure 7 For the utility model Figure 6 Schematic diagram of the side view of the middle knob.

[0023] In the figure: 2. Knob; 3. Gear; 4. Positioning tooth; 5. Return spring; 6. Armrest lower support; 11. Armrest rod; 12. Armrest bracket; 21. Cylindrical connection part; 22. Cylindrical connection part; 23. Manual control end; 31. Tooth edge plate; 32. First screw column; 41. Cross limit block; 42. Second screw column; 121. Cover plate; 122. Support block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] See also Figures 1 to 7 The utility model provides a technical solution: a rotatable armrest, including an armrest body, including an armrest lower bracket 6, an armrest bracket 12 rotatably connected to the armrest lower bracket 6, an armrest rod 11 connected to the armrest bracket 12 at the bottom end, and a cover plate 121 snap-connected to the armrest bracket 12, the armrest lower bracket 6 supports the armrest bracket 12 and the armrest rod 11, the armrest bracket 12 and the armrest rod 11 rotate with the armrest lower bracket 6 as the axis, and the angle of the armrest bracket 12 and the armrest rod 11 can be changed, and the cover plate 121 covers the internal components of the armrest bracket 12; the knob 2 rotatably connected to the armrest bracket 12 includes a cylindrical connecting portion 21, a cylindrical connecting portion 21 integrally injection-molded with the cylindrical connecting portion 21 The connecting part 22 and the hand control end 23 which is integrally injection molded with the cylindrical connecting part 22, the knob 2 is rotated, and the knob 2 changes the angle of the locking tooth 4, so that the locking tooth 4 and the gear 3 are separated from the meshing state, so that the armrest bracket 12 and the armrest lower support seat 6 are in a free rotation state, and the armrest rod 11 can be rotated clockwise or counterclockwise; the locking assembly includes a gear 3, a locking tooth 4 rotatably connected to the armrest bracket 12, and a return spring 5 installed inside the armrest bracket 12. A first screw column 32 passes through the gear 3, and a tooth edge plate 31 is provided on the side of the gear 3. The locking tooth 4 is meshed with the tooth edge plate 31, so that the counterclockwise rotation of the armrest bracket 12 is blocked, and the armrest bracket 12 is adjusted by rotating clockwise.

[0027] In this embodiment, a supporting block 122 with a semi-ellipsoidal structure is provided on the outer surface of the armrest bracket 12. When the thumb and index finger rotate the knob 2, the palm rests on the supporting block 122 to facilitate the rotation of the armrest bracket 12.

[0028] The locking tooth 4 is provided with a second screw column 42 connected to the armrest bracket 12, and the second screw column 42 is used to limit the locking tooth 4. The surface of the locking tooth 4 is provided with an axial hole for the second screw column 42 to pass through. Two groups of first ratchet teeth are provided on the surface of one end of the locking tooth 4. The number of the first ratchet teeth is between two and eight groups. The first ratchet teeth are in the shape of large and small sides. The end of the locking tooth 4 away from the ratchet teeth is provided with a cross limit block 41 embedded in one end of the reset spring 5. The cross limit block 41 limits the end of the reset spring 5. At the same time, the contraction of the reset spring 5 generates an elastic force on the locking tooth 4, which can make it rotate in the opposite direction and reset. The surface of the locking tooth 4 away from the cross limit block 41 is a non-planar sloped surface. The cylindrical connecting part 21 of the knob 2 contacts the sloped surface of the locking tooth 4. When the knob 2 is rotated, the locking tooth 4 can be rotated with the second screw column 42 as the axis, so that the locking tooth 4 and the tooth edge plate 31 are in a separated state.

[0029] In this embodiment, sixteen groups of second ratchet teeth are provided on the surface of the tooth edge plate 31, and the number of second ratchet teeth is between two and twenty groups. The second ratchet teeth are in the shape of large and small sides. A fixing hole for the first screw column 32 to pass through is provided on the surface of the gear 3. The center position of the surface of the gear 3 is in an inward concave shape. The first ratchet teeth and the second ratchet teeth are staggered, which can realize the limitation of the positioning teeth 4.

[0030] In this embodiment, the cross-section of the cylindrical connecting portion 21 is fan-shaped, and a fixed circular hole is provided in the middle position of the cylindrical connecting portion 21. The manual control end 23 passes through the cover plate 121. The manual control end 23 is an eccentric elliptical cylinder. The manual control end 23 is in an exposed state, and the knob 2 can be manually rotated.

[0031] The working principle and use process of this utility model:

[0032] When adjusting the angle of the armrest, the armrest lower bracket 6 is fixedly installed, and the armrest lower bracket 6 supports the armrest bracket 12;

[0033] Rotate the knob 2 clockwise along direction a to the stop position. The corner of the fan-shaped cylindrical connecting portion 21 of the knob 2 presses against the right end of the positioning tooth 4 with the cross limit block 41. One end of the positioning tooth 4 compresses the reset spring 5.

[0034] The locking tooth 4 rotates with the second screw column 42 as the axis, and its first ratchet teeth are disengaged from the second ratchet teeth on the surface of the tooth edge plate 31 of the gear 3. The armrest bracket 12 and the armrest lower bracket 6 are in a free rotation state, and the armrest rod 11 can be rotated clockwise or counterclockwise;

[0035] Turn the knob 2 counterclockwise to the stop position at the other end, and the corner of the fan-shaped columnar connecting portion 21 of the knob 2 will disengage the locking tooth 4. The locking tooth 4 is acted upon by the spring compression force of the reset spring 5, and the locking tooth 4 rotates with the second screw column 42 as the axis. The first ratchet tooth automatically falls into the side of the gear 3 and is in meshing state with the second ratchet tooth on the surface of the tooth edge plate 31. The locking tooth 4 is resisted by the gear 3. At this time, the handrail 11 cannot be rotated in the counterclockwise direction, but can be rotated in the clockwise direction, which is conducive to adjusting the angle of the handrail 11 and the handrail bracket 12.

[0036] To sum up: the seat armrest is designed to easily change the armrest angle. By rotating the knob 2, the first ratchet teeth on the locking teeth 4 are disengaged from the second ratchet teeth on the tooth edge plate 31, and the armrest rod 11 can be rotated clockwise or counterclockwise. By rotating the knob 2 in the opposite direction, the first ratchet teeth are engaged with the second ratchet teeth on the surface of the tooth edge plate 31. At this time, the armrest rod 11 cannot be rotated in the counterclockwise direction, but can be rotated in the clockwise direction, which is conducive to adjusting the angle of the armrest rod 11 and the armrest bracket 12.

[0037] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotatable and adjustable armrest, characterized in that: include The armrest body comprises an armrest lower support seat (6), an armrest bracket (12) rotatably connected to the armrest lower support seat (6), an armrest rod (11) whose bottom end is connected to the armrest bracket (12), and a cover plate (121) snap-connected to the armrest bracket (12); A knob (2) rotatably connected to an armrest bracket (12), comprising a cylindrical connecting portion (21), a cylindrical connecting portion (22) integrally injection-molded with the cylindrical connecting portion (21), and a hand control end (23) integrally injection-molded with the cylindrical connecting portion (22); The locking assembly comprises a gear (3), a locking tooth (4) rotatably connected to an armrest bracket (12), and a return spring (5) installed inside the armrest bracket (12); a first screw column (32) passes through the gear (3), and a tooth edge plate (31) is provided on the side of the gear (3).

2. The rotatable and adjustable armrest according to claim 1, characterized in that: A supporting block (122) with a semi-ellipsoidal structure is provided on the outer surface of the handrail bracket (12).

3. The rotatable and adjustable armrest according to claim 1, characterized in that: The locking tooth (4) is penetrated by a second screw column (42) connected to the handrail bracket (12); the surface of the locking tooth (4) is provided with an axial hole for the second screw column (42) to penetrate; one end surface of the locking tooth (4) is provided with two groups of first ratchet teeth, and the first ratchet teeth are in the shape of large and small sides.

4. The rotatable and adjustable armrest according to claim 3, characterized in that: The end of the locking tooth (4) away from the ratchet teeth is provided with a cross limit block (41) embedded in one end of the reset spring (5), and the surface of the locking tooth (4) away from the cross limit block (41) is a non-planar sloped curved surface.

5. The rotatable and adjustable armrest according to claim 1, characterized in that: Sixteen groups of second ratchet teeth are provided on the surface of the tooth edge plate (31), and the second ratchet teeth are in the shape of large and small edges. A fixing hole for the first screw column (32) to pass through is provided on the surface of the gear (3), and the center position of the surface of the gear (3) is in the shape of a concave depression.

6. The rotatable and adjustable armrest according to claim 1, characterized in that: The cross section of the columnar connecting portion (21) is fan-shaped, and a fixed circular hole is provided in the middle of the columnar connecting portion (21). The hand control end (23) passes through the cover plate (121), and the hand control end (23) is in the shape of an eccentric elliptical cylinder.

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