A self-locking liftable handrail assembly

Abstract

The present invention discloses a self-locking liftable armrest assembly, comprising an armrest body, an armrest bracket, a support bracket and a lifting and adjusting assembly. The armrest body is mounted on the armrest bracket. The armrest bracket is slidably connected to the support bracket. The support bracket is provided with a plurality of limit slots connected in sequence. The lifting and adjusting assembly is mounted on the armrest bracket and can cooperate with the limit slots to lock or unlock the lifting and lowering bracket. The present invention provides a locking assembly and a plurality of limit slots that cooperate with the locking assembly, so that the armrest bracket can automatically lock or unlock during the lifting process, which is convenient for the user to drive the lifting of the armrest bracket. At the same time, a reset member that cooperates with the locking assembly is provided on one side of the locking assembly, so that when the armrest bracket moves to the limit position, the locking assembly can be controlled by the reset member to automatically switch between the stretching adjustment state and the reset state, thereby meeting the user's demand for lifting or lowering the armrest bracket.

Description

Technical Field

[0001] The invention belongs to the technical field of chair armrests, and in particular relates to a self-locking liftable armrest assembly. Background Art

[0002] Armrests are often installed on chairs, beds and other equipment that support the human body. They are widely used in cinemas, hospitals, residences and other places. They are very common facilities in the daily lives of ordinary people. The existing seat armrests can be adjusted to raise or lower the height of the armrests according to the needs of the user. At present, in order to adjust the height of the armrests of the chair to a comfortable state, it is generally through the principle of levers that the button on the armrest support is manually pressed to transmit force to drive the hook to unlock, and then the spring returns to lock the card point. This structure has the problem of continuous pressing during the adjustment process, which is inconvenient to operate.

[0003] The Chinese patent with the publication number "CN106073250B" discloses a self-locking liftable armrest assembly, including an inner sleeve, a lift bracket, a lift control mechanism and an armrest portion above the lift bracket, the lift bracket is movably arranged inside the inner sleeve, the lift control mechanism includes an unlocking portion and a pressing portion, the side wall of the unlocking portion is provided with a groove, the side wall of the lift bracket is provided with a channel, the side wall of the inner sleeve is provided with a buckle hole, the groove, the channel and the buckle hole are interconnected, a mover is provided in the channel, and a return mechanism is provided on the unlocking portion and / or the pressing portion. The armrest is adjustable in the up and down position through the lift control mechanism, the horizontal position of the armrest is adjusted in the four directions of front, back, left and right through the first slide groove and the second slide groove, and the horizontal rotation of the armrest is adjusted through the rotation of the depression relative to the rotating block.

[0004] The lifting and lowering of the armrest in the above patent still requires a lot of effort to press to unlock and adjust, which is inconvenient and laborious to operate. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a self-locking liftable armrest assembly to solve the technical problems of the prior art armrests being complicated and laborious to operate during lifting and adjusting.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows: A self-locking liftable handrail assembly comprises a handrail body, a handrail bracket, a support bracket and a lift adjustment assembly. The handrail body is mounted on the handrail bracket. The handrail bracket is slidably connected to the support bracket.

[0007] The support bracket is provided with multiple levels of sequentially connected limit slots. The lifting and lowering adjustment component is installed on the armrest bracket and can cooperate with the limit slots to lock or unlock the lifting bracket.

[0008] The lifting and lowering adjustment component comprises a locking component and a reset component. The locking component is slidably connected to the armrest shell body and has two working states under the control of the reset component, namely a stretching adjustment state and a reset state.

[0009] In the stretching adjustment state, the locking assembly can be inserted into the limit slot when moving to the corresponding limit slot, thereby locking the downward movement of the lifting bracket. At the same time, the locking assembly can be disengaged when switching upward to the next limit slot, so that the lifting bracket can be lifted smoothly. In the reset state, the reset member pushes the locking assembly out of each limit slot and maintains it, so that the lifting bracket can slide downward smoothly.

[0010] Furthermore, the locking assembly includes a locking member and an elastic member. The locking member is slidably connected to the armrest body. The locking member can be inserted into the corresponding limit slot when sliding outward to lock the armrest body downward; the locking member can be disengaged from the corresponding limit slot when moving inward to realize the free lifting of the armrest body. The elastic member is used to push the locking member to move outward.

[0011] Furthermore, the locking member is divided into a sliding portion at the inner end and a locking portion at the outer end from the inside to the outside. The upper end of the locking portion is provided with a guiding inclined surface inclined upward.

[0012] Furthermore, the reset member is slidably connected to the armrest bracket, and the sliding direction is perpendicular to the sliding direction of the locking member. A protrusion is fixed on the locking member. A limiting portion that cooperates with the protrusion is provided on the side edge of the reset member to realize the switching of the locking member between the stretching adjustment state and the reset state.

[0013] Furthermore, the limiting portion of the reset member includes a guide section and a fixing section. The guide section is a bevel extending inward in the vertical direction; the fixing section is a concave groove. In the initial state, the protrusion on the locking member is located at the bottom of the guide section. The reset member is synchronously lifted under the drive of the locking member.

[0014] Furthermore, the reset member is provided with a first guide portion for achieving sliding cooperation between the reset member and the support bracket. The locking assembly also includes a slide. The slide is fixed on the armrest bracket. A second guide portion is provided on the slide. The slide slides with the support bracket through the second guide portion. In the initial state, the first guide portion on the reset member and the second guide portion on the slide are staggered, and the first guide portion is higher than the second guide portion in the vertical direction.

[0015] Further, in the initial state, the distance between the first guiding portion and the second guiding portion is equal to the distance from the bottom to the top of the guiding section of the reset member in the vertical direction.

[0016] Furthermore, the support bracket is provided with a limit slide groove matched with the first guide portion. The first guide portion extends into the limit slide groove, and the limit slide groove limits the limit position of the upward or downward movement of the reset member. The second guide portion is inserted into the guide slide groove. The limit slide groove is flush with the top end of the guide slide groove. The bottom end of the guide slide groove is lower than the limit slide groove.

[0017] Furthermore, a clearance groove cooperating with the locking member is provided in the middle of the reset member. The outer end of the locking member passes through the clearance groove. Both side surfaces of the locking member are fixed with protrusions. Both side edges of the reset member are provided with limiting parts cooperating with the protrusions.

[0018] Furthermore, each level of the position limiting slot includes a locking surface at the bottom and an inclined guiding surface at the top, wherein the locking surface and the guiding surface form an upward tapered notch.

[0019] Compared with the prior art, the present invention has the following advantages: 1. The present invention provides a locking assembly and a multi-level limit slot that cooperates with the locking assembly, so that the armrest bracket can automatically lock or unlock during the lifting process, which is convenient for the user to drive the lifting of the armrest bracket. At the same time, a reset member that cooperates with the locking assembly is provided on one side of the locking assembly, so that when the armrest bracket moves to the extreme position, the locking assembly can be controlled by the reset member to automatically switch between the stretching adjustment state and the reset state, thereby meeting the user's needs for lifting or lowering the armrest bracket.

[0020] 2. The present invention provides a first guide portion on the reset member and a second guide portion on the slide for mounting the locking member. The first guide portion on the reset member in the initial state and the second guide portion on the slide are staggered so that when the locking member is lifted to the limit position, the reset member can realize automatic switching of the working state, which is convenient for the user's operation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the relative positions of the lifting and adjusting assembly and the supporting bracket in the present invention; Figure 3 Schematic diagram of the structure of the lifting and lowering adjustment component in the present invention ( Figure 2 Partial enlarged view of part A in the middle); Figure 4 Schematic diagram of the relative positions of the locking member and the resetting member in the present invention; Figure 5 It is a structural schematic diagram of the reset member in the present invention; Figure 6 It is a schematic diagram of the relative positions of the first guide portion on the reset member and the second guide portion on the slide seat in the present invention.

[0022] Figure numerals: 1. armrest body; 2. armrest bracket; 2-1. lifting bracket; 3. supporting bracket; 4. lifting adjustment assembly; 5. limiting slot; 5-1. locking surface; 5-2. guide surface; 6. locking assembly; 6-1. slide seat; 6-2. locking member; 6-2-1. sliding part; 6-2-2. locking part; 6-3. elastic member; 7. reset member; 8. second slide groove; 9. protrusion; 10. limiting part; 10-1. fixing section; 10-2. guide section; 11. first guide connecting part; 12. limiting slide groove; 13. second guide connecting part; 14. guide slide groove. DETAILED DESCRIPTION

[0023] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships 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 cannot be understood as a limitation on the present invention.

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figure 1 and 2 As shown, a self-locking liftable armrest assembly includes an armrest body 1, an armrest bracket 2, a support bracket 3 and a lift adjustment assembly 4. Among them, the armrest bracket 2 includes an external shell bracket and an internal lift bracket 2-1. The armrest body 1 is installed on the shell bracket. The bottom of the lift bracket 2-1 is provided with a mounting groove that matches the support bracket 3. The lift bracket 2-1 is covered on the support bracket 3 through the mounting groove and slides with the support bracket 3. The support bracket 3 is provided with a plurality of limit slots 5 connected in sequence. The lift adjustment assembly 4 is installed on the lift bracket 2-1, and can cooperate with the limit slot 5 to achieve locking or unlocking of the lift bracket 2-1.

[0026] The lifting and lowering adjustment component 4 includes a locking component 6 and a reset component 7. The locking component 6 is slidably connected to the armrest shell body, and has two working states under the control of the reset component 7, namely, a stretching adjustment state and a reset state.

[0027] In the tension adjustment state, the locking assembly 6 can be inserted into the limit slot 5 when moving to the corresponding limit slot 5, so as to lock the downward movement of the lifting bracket 2-1. At the same time, the locking assembly 6 can be disengaged when switching upward to the next level limit slot 5, so that the lifting bracket 2-1 can be lifted smoothly. In the reset state, the reset member 7 pushes the locking assembly 6 to disengage from each limit slot 5 and maintain it, so that the lifting bracket 2-1 can slide downward smoothly.

[0028] Specific structure such as Figure 2 and 3 As shown, the locking assembly 6 includes a slide 6-1, a locking member 6-2 and an elastic member 6-3. The slide 6-1 is fixed on the lifting bracket 2-1 and can rise or fall synchronously with the lifting bracket 2-1. The slide 6-1 is provided with a first slide groove that matches the locking member 6-2. The locking member 6-2 is slidably connected in the first slide groove. The locking member 6-2 is divided into a sliding portion 6-2-1 at the inner end and a locking portion 6-2-2 at the outer end from the inside to the outside. The upper end of the locking portion 6-2-2 is provided with an inclined guide slope that tilts upward, so that when the locking member 6-2 is lifted and stretched under the drive of the slide 6-1, it can slide inward under the cooperation of the limit card slot 5, so as to realize the separation of the locking member 6-2 from the corresponding limit card slot 5. When the locking member 6-2 moves to the next level of the limit card slot 5, the locking member 6-2 can move outward under the push of the elastic member 6-3 and gradually insert into the corresponding limit card slot 5.

[0029] like Figure 3 , 4 As shown in Figures 5 and 6, a second slide groove 8 is provided on the slide seat 6-1 to match the reset member 7. The reset member 7 is slidably connected in the second slide groove 8, and the sliding direction is perpendicular to the sliding direction of the locking member 6-2. A clearance groove matching the locking member 6-2 is provided in the middle of the reset member 7. The outer end of the sliding portion 6-2-1 of the locking member 6-2 passes through the clearance groove. Bumps 9 are fixed on both side surfaces of the locking member 6-2. Limiting portions 10 matching the bumps 9 are provided on both side edges of the reset member 7 to enable the locking member 6-2 to switch between the stretching adjustment state and the reset state.

[0030] like Figure 4 and 5 As shown, the limiting portion 10 of the reset member 7 includes a fixing section 10-1 in the middle and guide sections 10-2 on both sides. The guide section 10-2 is a bevel extending inward in the vertical direction; the fixing section 10-1 is a concave groove. In the initial state, the protrusions 9 on both sides of the locking member 6-2 are located at the bottom of the guide section 10-2 below. The reset member 7 is synchronously lifted under the drive of the locking member 6-2.

[0031] When the reset member 7 moves upward to the limit position, the locking member 6-2 continues to lift upward driven by the lifting bracket 2-1. The protrusion 9 on the locking member 6-2 gradually moves inward under the guidance of the guide section 10-2, thereby driving the locking member 6-2 to slide inward and gradually disengage from the limiting slot 5. When the protrusion 9 on the locking member 6-2 moves to the end of the guide section 10-2 and enters the clamping section 10-1, the locking member 6-2 switches to the reset state. The locking member 6-2 retracts into the first slide groove and is maintained under the limitation of the reset member 7, so that the locking portion 6-2-2 on the locking member 6-2 can maintain the state of being disengaged from the limiting slot 5, and the lifting bracket 2-1 can slide arbitrarily along the vertical direction. When the reset member 7 moves downward to the extreme position driven by the lifting bracket 2-1, the locking member 6-2 continues to descend driven by the lifting bracket 2-1, so that the protrusion 9 on the locking member 6-2 is separated from the fixing section 10-1 on the reset member 7, and the locking member 6-2 switches to the stretching adjustment state. The locking member 6-2 can realize the step-by-step lifting of the lifting bracket 2-1 with the cooperation of the elastic member 6-3 and the various levels of limit slots 5.

[0032] Further, if Figure 6 As shown, the reset member 7 is provided with an integrally formed first guide portion 11. The support bracket 3 is provided with a limit slide groove 12 that matches the first guide portion 11. The first guide portion 11 extends into the limit slide groove 12, and the limit position of the reset member 7 moving upward or downward is limited by the limit slide groove 12. A second guide portion 13 extending outward is provided on the side wall of the slide 6-1. The support bracket 3 is provided with a guide slide groove 14 that matches the second guide portion 13. The second guide portion 13 is inserted into the guide slide groove 14. In this embodiment, the limit slide groove 12 is flush with the top end of the guide slide groove 14. The bottom end of the guide slide groove 14 is lower than the limit slide groove 12.

[0033] In the initial state, the first guiding portion 11 on the reset member 7 and the second guiding portion 13 on the slide 6-1 are offset, and the first guiding portion 11 is higher than the second guiding portion 13 in the vertical direction, so that when the first guiding portion 11 slides upward to the end of the limiting slide groove 12, the second guiding portion 13 can continue to move upward or downward, thereby achieving the offset between the locking member 6-2 installed on the slide 6-1 and the reset member 7.

[0034] In this embodiment, in the initial state, the distance between the first guiding portion 11 and the second guiding portion 13 is equal to the distance from the bottom to the top of the guiding section 10 - 2 of the reset member 7 in the vertical direction.

[0035] In addition, in this embodiment, each level of the limit slot 5 includes a locking surface 5-1 at the bottom and an inclined guide surface 5-2 at the top. The locking surface 5-1 and the guide surface 5-2 form an upward tapered notch, so that the handrail bracket 2 can be lifted step by step under the action of an external force. At the same time, when it is lifted to a specified height, the handrail bracket 2 is locked to prevent the handrail bracket 2 from gradually falling.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-locking liftable handrail assembly, comprising a handrail body (1), a handrail bracket (2), a support bracket (3) and a lift adjustment assembly (4); the handrail body (1) is mounted on the handrail bracket (2); the handrail bracket (2) is slidably connected to the support bracket (3), characterized in that: The support bracket (3) is provided with a plurality of sequentially connected limiting slots (5); the lifting and lowering adjustment component (4) is mounted on the armrest bracket (2) and can cooperate with the limiting slots (5) to achieve locking or unlocking of the lifting bracket (2-1); The lifting and lowering adjustment component (4) comprises a locking component (6) and a reset component (7); the locking component (6) is slidably connected to the armrest shell body and has two working states under the control of the reset component (7), namely a stretching adjustment state and a reset state; In the stretched adjustment state, the locking assembly (6) can be inserted into the limit slot (5) when moving to the corresponding limit slot (5), thereby locking the downward movement of the lifting bracket (2-1); at the same time, the locking assembly (6) can be disengaged when switching upward to the next level of limit slot (5), so that the lifting bracket (2-1) can be lifted smoothly; in the reset state, the reset member (7) pushes the locking assembly (6) to disengage from each limit slot (5) and maintain it, so that the lifting bracket (2-1) can slide downward smoothly.

2. A self-locking liftable handrail assembly according to claim 1, characterized in that: The locking assembly (6) comprises a locking piece (6-2) and an elastic piece (6-3); the locking piece (6-2) is slidably connected to the armrest body (1); the locking piece (6-2) can be inserted into the corresponding limiting slot (5) when sliding outward, thereby locking the armrest body (1) to move downward; the locking piece (6-2) can be disengaged from the corresponding limiting slot (5) when moving inward, thereby enabling the armrest body (1) to be lifted freely; and the elastic piece (6-3) is used to push the locking piece (6-2) to move outward.

3. A self-locking liftable handrail assembly according to claim 2, characterized in that: The locking piece (6-2) is divided from the inside to the outside into a sliding portion (6-2-1) at the inner end and a locking portion (6-2-2) at the outer end; the upper end of the locking portion (6-2-2) is provided with a guiding inclined surface inclined upward.

4. A self-locking liftable handrail assembly according to claim 2, characterized in that: The reset member (7) is slidably connected to the armrest bracket (2), and the sliding direction is perpendicular to the sliding direction of the locking member (6-2); a protrusion (9) is fixed to the locking member (6-2); a limiting portion (10) matching the protrusion (9) is provided on the side edge of the reset member (7) for realizing the switching of the locking member (6-2) between a stretched adjustment state and a reset state.

5. A self-locking liftable handrail assembly according to claim 4, characterized in that: The limiting portion (10) of the reset member (7) comprises a guide section (10-2) and a fixing section (10-1); the guide section (10-2) is a bevel extending inwardly in the vertical direction; the fixing section (10-1) is a concave groove; in an initial state, the protrusion (9) on the locking member (6-2) is located at the bottom of the guide section (10-2); and the reset member (7) is synchronously lifted under the drive of the locking member (6-2).

6. A self-locking liftable handrail assembly according to claim 2, characterized in that: The reset member (7) is provided with a first guide portion (11) for achieving sliding cooperation between the reset member (7) and the support bracket (3); the locking assembly (6) further comprises a slide seat (6-1); the slide seat (6-1) is fixed on the handrail bracket (2), and a second guide portion (13) is provided on the slide seat (6-1); the slide seat (6-1) is slidingly cooperated with the support bracket (3) via the second guide portion (13); in an initial state, the first guide portion (11) on the reset member (7) and the second guide portion (13) on the slide seat (6-1) are staggered, and the first guide portion (11) is higher than the second guide portion (13) in the vertical direction.

7. A self-locking liftable handrail assembly according to claim 6, characterized in that: In an initial state, the distance between the first guide portion (11) and the second guide portion (13) is equal to the distance from the bottom to the top of the guide section (10-2) of the reset element (7) in the vertical direction.

8. The self-locking liftable handrail assembly according to claim 6, characterized in that: The support bracket (3) is provided with a limiting slide groove (12) that matches the first guide portion (11); the first guide portion (11) extends into the limiting slide groove (12), and the limiting slide groove (12) limits the limit position of the upward or downward movement of the reset member (7); the second guide portion (13) is inserted into the guide slide groove (14); the limiting slide groove (12) is flush with the top end of the guide slide groove (14); the bottom end of the guide slide groove (14) is lower than the limiting slide groove (12).

9. The self-locking liftable handrail assembly according to claim 2, characterized in that: The middle of the reset member (7) is provided with a clearance groove that matches the locking member (6-2); the outer end of the locking member (6-2) passes through the clearance groove; protrusions (9) are fixed on both side surfaces of the locking member (6-2); and limiting portions (10) that match the protrusions (9) are provided on both side edges of the reset member (7).

10. The self-locking liftable handrail assembly according to claim 1, characterized in that: Each level of the limit slot (5) comprises a locking surface (5-1) at the bottom and an inclined guide surface (5-2) at the top; the locking surface (5-1) and the guide surface (5-2) form an upward tapered notch.

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