Lifting handrail

Abstract

The utility model relates to the technical field of seat armrests, in particular to a lifting armrest which comprises a lifting support, a lifting sleeve is sleeved on the outer side of the lifting support, the lifting support and the lifting sleeve can relatively slide along the vertical direction, a plurality of positioning grooves are uniformly arranged on the side wall of the lifting sleeve along the vertical direction, and the positioning grooves are matched with the lifting support. A positioning block is arranged in the lifting support and can slide in the transverse direction, one end of the positioning block can penetrate out of the side wall of the lifting support, and the positioning block is used for transversely sliding to penetrate into the positioning groove to be matched with the lifting sleeve when the lifting support slides to a preset position relative to the lifting sleeve. Therefore, the lifting support is prevented from sliding relative to the lifting sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of seat armrests, in particular to a lifting armrest. Background Art

[0002] An office chair refers to a chair with a backrest that a person sits on when working at a desk. It is broadly defined as all chairs used in offices, including staff chairs, conference chairs, visitor chairs, training chairs, etc. The design of office chairs conforms to ergonomics and is convenient for users to operate and experience. Since office chairs are used by staff, they require employees to devote a high degree of energy and maintain a sitting posture for a long time. Office chairs can ensure the comfort of users. Office chairs play an extremely important auxiliary role for employees. A good office chair can relieve employees' fatigue after working for a long time, so that employees can be in a better state to devote themselves to work.

[0003] An office chair includes a seat, a backrest and armrests. The armrests include a panel and a base. As an indispensable component of a seat, the armrests are now fixedly installed on both sides of the seat, but the height cannot be changed. Due to different usage habits of users, each person requires a different armrest height, and the flexibility is not high. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lifting handrail.

[0005] The utility model is realized by the following technical solutions:

[0006] A lifting handrail comprises a lifting bracket, a lifting sleeve is sleeved on the outer side of the lifting bracket, the lifting bracket and the lifting sleeve can slide relative to each other in the vertical direction, a plurality of positioning grooves are evenly arranged on the side wall of the lifting sleeve in the vertical direction, a positioning block is arranged in the lifting bracket, the positioning block can slide in the horizontal direction and one end can pass through the side wall of the lifting bracket, the positioning block is used to slide in the horizontal direction and pass into the positioning groove to cooperate with the lifting sleeve when the lifting bracket slides to a predetermined position relative to the lifting sleeve, so as to limit the lifting bracket from sliding relative to the lifting sleeve.

[0007] As a further improvement of the utility model, the lifting bracket is provided with a control mechanism for controlling the lateral sliding of the positioning block;

[0008] The control mechanism includes a control bracket which can be vertically slidably arranged in the lifting bracket, a control panel is arranged at the upper end of the control bracket, one end of the control panel passes through the lifting bracket so as to be controlled by a user to lift the control bracket, and a transmission mechanism cooperating with the positioning block is arranged at the lower end of the control bracket so as to drive the positioning block to slide laterally when the control bracket is lifted or lowered.

[0009] As a further improvement of the present invention, the transmission mechanism includes an inclined transmission block arranged on the inner wall of the control bracket, the inclined transmission block is inclined from bottom to top toward the positioning groove, and the side wall of the positioning block is provided with an inclined transmission groove for transmission cooperation with the inclined transmission block.

[0010] As a further improvement of the present invention, a mounting opening is provided on the side wall of the lifting bracket, and the mounting opening is aligned with the opening through which the positioning block passes through the lifting bracket, so as to be used for installing the positioning block.

[0011] As a further improvement of the utility model, an intermediate plate is provided at the upper end of the lifting bracket for connecting the handrail.

[0012] As a further improvement of the present invention, a control opening is provided between the side wall of the control bracket and the middle plate, and the control opening is used for the control plate to pass through and for the control plate to slide down a preset distance.

[0013] As a further improvement of the present invention, an elastic member is arranged between the middle plate and the control bracket, and two ends of the elastic member respectively abut against the middle plate and the upper end of the control bracket to drive the control bracket to slide downward or prevent the control bracket from sliding upward.

[0014] As a further improvement of the utility model, the elastic member is a compression spring, a spring groove is provided at the lower end of the middle plate, a positioning column is provided at the upper end of the control bracket, and the lower end of the compression spring is sleeved on the positioning column.

[0015] As a further improvement of the present invention, a guide groove is provided on the middle plate, and a guide member is provided on the upper end of the control bracket, and the guide member can be vertically inserted into the guide groove.

[0016] As a further improvement of the present invention, the lifting sleeve is provided with a push groove along the vertical direction on one side away from the positioning groove, the lifting bracket is provided with a push block, the push block is provided with a push protrusion inserted into the push groove, and the push protrusion is used to push against the wall of the push groove when the lifting bracket slides to a predetermined position relative to the lifting sleeve, so as to limit the lifting bracket from being out of coordination with the lifting sleeve.

[0017] The beneficial effects of the utility model are as follows: in the utility model, the lifting bracket and the lifting sleeve bracket can slide relative to each other in the vertical direction, wherein the lifting bracket is used to connect the armrest plate, and the lifting sleeve bracket is used to connect the seat, so that the armrest can be lifted and lowered on both sides of the seat; and in the present embodiment, the side wall of the lifting sleeve is provided with a plurality of positioning grooves, when the lifting bracket slides to a predetermined position relative to the lifting sleeve, the positioning block can be controlled to slide into the positioning groove, at which time a part of the positioning block is located in the lifting bracket, and a part of the positioning block is located in the positioning groove, thereby limiting the sliding of the lifting bracket relative to the lifting sleeve, thereby fixing the height of the armrest, thereby satisfying the user's usage habits, and improving the flexibility of the armrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 It is a schematic diagram of the structure of a utility model embodiment;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model embodiment;

[0021] Figure 3 This is a schematic diagram of the lifting sleeve structure of the utility model embodiment;

[0022] Figure 4 This is a schematic structural diagram of the lifting sleeve from another angle in the utility model embodiment;

[0023] Figure 5 This is a schematic diagram of the lifting bracket structure of the utility model embodiment;

[0024] Figure 6 This is a schematic diagram of the control bracket structure of the utility model embodiment;

[0025] Figure 7 This is a schematic diagram of the positioning block structure of the utility model embodiment;

[0026] Figure 8 It is a schematic diagram of the structure of the intermediate plate in the utility model embodiment. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0028] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0029] refer to Figures 1 to 8 , the utility model embodiment discloses:

[0030] A lifting handrail, comprising a lifting bracket 1, wherein a lifting sleeve 2 is sleeved on the outer side of the lifting bracket 1, wherein the lifting bracket 1 and the lifting sleeve 2 can slide relative to each other vertically, wherein a plurality of positioning grooves 3 (9 as shown in the figure) are evenly arranged on the side wall of the lifting sleeve 2 vertically, wherein a positioning block 4 is arranged inside the lifting bracket 1, wherein the positioning block 4 can slide horizontally and one end of the positioning block 4 can pass through the side wall of the lifting bracket 1, wherein the positioning block 4 is used to slide horizontally into the positioning groove 3 and cooperate with the lifting sleeve 2 when the lifting bracket 1 slides to a predetermined position relative to the lifting sleeve 2, so as to limit the lifting bracket 1 from sliding relative to the lifting sleeve 2; wherein The lifting bracket 1 is used to connect the armrest plate, and the lifting sleeve 2 is used to connect the seat. The lifting bracket 1 and the lifting sleeve 2 can slide relative to each other in the vertical direction, so that the armrests can be lifted and lowered on both sides of the seat, and the positioning block 4 can be laterally slidably arranged in the lifting bracket 1. When the lifting bracket 1 slides vertically to a predetermined position, the positioning block 4 can be controlled to slide and cooperate with the positioning groove 3. At this time, a part of the positioning block 4 is located in the lifting bracket 1, and a part of it is located in the positioning groove 3, thereby limiting the lifting bracket 1 from sliding relative to the lifting sleeve 2 to fix the height of the armrest, thereby satisfying the user's usage habits and improving the flexibility of the armrest.

[0031] The lifting bracket 1 is provided with a control mechanism for controlling the lateral sliding of the positioning block 4; the control mechanism includes a control bracket 5 which can be vertically slidably arranged in the lifting bracket 1, and a control board 6 is arranged at the upper end of the control bracket 5, and one end of the control board 6 passes through the lifting bracket 1 so as to be controlled by a user to drive the control bracket 5 to rise and fall, and a transmission mechanism cooperating with the positioning block 4 is arranged at the lower end of the control bracket 5 so as to drive the positioning block 4 to slide horizontally when the control bracket 5 is raised and lowered; the user can manually drive the control board 6 to rise and fall, and the lifting board 6 is fixedly arranged on the control bracket 5 The upper end of the control bracket 5 is driven to rise and fall, and a transmission mechanism is arranged between the positioning block 4 at the lower end of the control bracket, thereby driving the positioning block 4 to slide laterally, and the control method is simple and convenient; specifically, the transmission mechanism includes an inclined transmission block 7 arranged on the inner wall of the control bracket 5, and the inclined transmission block 7 is inclined from bottom to top toward the positioning groove 3. The side wall of the positioning block 4 is provided with an inclined transmission groove 8 for transmission cooperation with the inclined transmission block 7. In the process of controlling the lifting and lowering of the control bracket 5, the inclined transmission block 7 cooperates with the inclined transmission groove 8, thereby driving the positioning block 4 to slide laterally. The structure is simple and the operation is convenient.

[0032] In addition, in the present embodiment, an intermediate plate 10 is provided at the upper end of the lifting bracket 1 for connecting the handrail, and the intermediate plate 10 is fixedly connected to the upper end of the lifting bracket 1 by bolts; and in the present embodiment, an installation opening 9 is opened on the side wall of the lifting bracket 1, and the installation opening 9 is aligned with the opening of the positioning block 4 passing through the lifting bracket 1 for installing the positioning block 4.

[0033] A control opening 11 is defined between the side wall of the control bracket 5 and the middle plate 10 , and the control opening 11 is used for the control plate 6 to pass through and for the control plate 6 to slide up and down a preset distance.

[0034] An elastic member is provided between the middle plate 10 and the control bracket 5 , and two ends of the elastic member respectively abut against the middle plate 10 and the upper end of the control bracket 5 to drive the control bracket 5 to slide downward or prevent the control bracket 5 from sliding upward.

[0035] The elastic member is a compression spring (not shown in the figure), a spring groove 13 is provided at the lower end of the middle plate 10, a positioning column 14 is provided at the upper end of the control bracket 5, and the lower end of the compression spring is sleeved on the positioning column 14.

[0036] A guide groove 15 is provided on the middle plate 10 , and a guide member 16 is provided on the upper end of the control bracket 5 . The guide member 16 can be vertically inserted into the guide groove 15 .

[0037] The lifting sleeve 2 is vertically provided with a resisting groove 17 on one side away from the positioning groove 3, and the lifting bracket 1 is provided with a resisting block 18. The resisting block 18 is provided with a resisting protrusion 19 that penetrates into the resisting groove 17. The resisting protrusion 19 is used to resist the groove wall of the resisting groove 17 when the lifting bracket 1 slides to a predetermined position relative to the lifting sleeve 2, so as to limit the lifting bracket 1 and the lifting sleeve 2 from being out of cooperation. As shown in the figure, the resisting groove 17 and the mounting opening 9 are on the same side.

[0038] Working principle:

[0039] In this embodiment, the lifting bracket 1 is connected to the armrest through the middle plate 10, and the lifting sleeve 2 is connected to the seat. When the user needs to control the lifting of the armrest, the control panel 6 is first controlled to rise. At this time, the control panel 6 drives the control bracket 5 to rise and compresses the compression spring, and the inclined transmission block 7 provided at the lower end of the control bracket 5 cooperates with the positioning block 4 to drive the positioning block 4 to slide into the lifting bracket 1, so that the positioning block 4 is disengaged from the positioning groove 3 corresponding to the height. At this time, the lifting bracket 1 can be controlled to rise and fall to adjust the height of the armrest; after adjusting to a suitable height, the user releases the control panel 6. At this time, the control bracket 5 is lowered and reset under the action of the compression spring, and the positioning block 4 slides into the positioning groove 3 under the action of the inclined transmission block 7 and the inclined transmission groove 8, and cooperates with the positioning groove 3. At this time, a part of the positioning block 4 is located in the lifting bracket 1, and a part is located in the positioning groove 3, thereby limiting the lifting bracket 1 from sliding and rising relative to the lifting sleeve 2, thereby achieving a fixed height of the armrest.

[0040] Disassembly:

[0041] First, the positioning block 4 is controlled to penetrate into the lifting bracket 1 from the installation opening 9, and then the control bracket 5 is controlled to penetrate into the lifting bracket 1 from the upper end downward, and the tilt transmission block 7 is controlled to be aligned with the tilt transmission groove 8, so that the control bracket 5 is connected and matched with the positioning block 4, and the positioning block 4 and the control bracket 5 are simple and convenient to install; then a compression spring is sleeved on the position column 14 at the upper end of the control bracket 5, and then the middle plate 10 is installed by bolts, and the other end of the compression spring is matched with the spring groove 13; finally, the lifting bracket 5 is controlled to be aligned with the tilt transmission block 7 and ... and the control bracket 5; The lowering sleeve 2 is sleeved on the lifting bracket 1 from bottom to top. During the process, the upper end of the lifting sleeve 2 first presses the abutting block 18, so that the abutting block 18 is elastically deformed toward the inside of the lifting bracket 1 and gradually rises until the abutting protrusion 19 on the rising abutting block 18 encounters the abutting groove 17, and the abutting block 18 is reset. At this time, the abutting protrusion 19 is located inside the abutting groove 17; at this time, the assembly of this embodiment is completed, and then the lowering bracket 1 can be controlled to be connected to the armrest through the middle plate 10, and the lifting sleeve 2 can be connected to the seat, with a simple structure and convenient assembly.

[0042] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A lifting handrail, comprising a lifting bracket (1), wherein a lifting sleeve (2) is sleeved on the outer side of the lifting bracket (1), and the lifting bracket (1) and the lifting sleeve (2) can slide relative to each other in the vertical direction, characterized in that: The side wall of the lifting sleeve (2) is evenly provided with a plurality of positioning grooves (3) along the vertical direction. A positioning block (4) is provided in the lifting bracket (1). The positioning block (4) can slide in the horizontal direction and one end of the positioning block can pass through the side wall of the lifting bracket (1). The positioning block (4) is used to slide in the horizontal direction and pass through the positioning groove (3) to cooperate with the lifting sleeve (2) when the lifting bracket (1) slides to a predetermined position relative to the lifting sleeve (2), so as to limit the lifting bracket (1) from sliding relative to the lifting sleeve (2) again.

2. A lifting armrest according to claim 1, characterized in that: The lifting bracket (1) is provided with a control mechanism for controlling the lateral sliding of the positioning block (4); The control mechanism comprises a control bracket (5) which can be vertically slidably arranged in the lifting bracket (1); a control panel (6) is arranged at the upper end of the control bracket (5); one end of the control panel (6) passes through the lifting bracket (1) so as to be used for a user to control the lifting of the control bracket (5); and a transmission mechanism cooperating with the positioning block (4) is arranged at the lower end of the control bracket (5) so as to drive the positioning block (4) to slide horizontally when the control bracket (5) is lifted or lowered.

3. A lifting armrest according to claim 2, characterized in that: The transmission mechanism comprises an inclined transmission block (7) arranged on the inner wall of the control bracket (5), the inclined transmission block (7) being arranged inclined from bottom to top toward the positioning groove (3), and the side wall of the positioning block (4) is provided with an inclined transmission groove (8) for transmission cooperation with the inclined transmission block (7).

4. A lifting armrest according to claim 3, characterized in that: The side wall of the lifting bracket (1) is provided with an installation opening (9), and the installation opening (9) is aligned with an opening through which the positioning block (4) passes through the lifting bracket (1), so as to be used for installing the positioning block (4).

5. The lifting armrest according to claim 2, characterized in that: An intermediate plate (10) is provided at the upper end of the lifting bracket (1) for connecting an armrest.

6. The lifting armrest according to claim 5, characterized in that: A control opening (11) is provided between the side wall of the control bracket (5) and the middle plate (10), and the control opening (11) is used for the control plate (6) to pass through and for the control plate (6) to slide up and down a preset distance.

7. The lifting armrest according to claim 5, characterized in that: An elastic member is provided between the middle plate (10) and the control bracket (5), and two ends of the elastic member respectively abut against the middle plate (10) and the upper end of the control bracket (5) to drive the control bracket (5) to slide downward or prevent the control bracket (5) from sliding upward.

8. The lifting armrest according to claim 7, characterized in that: The elastic member is a compression spring, the lower end of the intermediate plate (10) is provided with a spring slot (13), the upper end of the control bracket (5) is provided with a positioning column (14), and the lower end of the compression spring is sleeved on the positioning column (14).

9. The lifting armrest according to claim 5, characterized in that: A guide groove (15) is provided on the middle plate (10), and a guide member (16) is provided on the upper end of the control bracket (5), wherein the guide member (16) can be vertically inserted into the guide groove (15).

10. The lifting armrest according to claim 1, characterized in that: The lifting sleeve (2) is provided with a resisting groove (17) in the vertical direction on one side away from the positioning groove (3); the lifting bracket (1) is provided with a resisting block (18); the resisting block (18) is provided with a resisting protrusion (19) which penetrates into the resisting groove (17); the resisting protrusion (19) is used to resist the groove wall of the resisting groove (17) when the lifting bracket (1) slides to a predetermined position relative to the lifting sleeve (2) to limit the lifting bracket (1) from disengaging from the lifting sleeve (2).

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