Handrail

Abstract

The utility model provides an armrest which is used for solving the technical problem that some existing seat armrests cannot rotate along with a backrest and cannot meet the use requirements of a user. The armrest comprises a first rod part, the periphery of the first rod part is sleeved with a second rod part in a sliding adjusting mode, one end of the second rod part is rotationally provided with a third rod part, the tail end of the first rod part is provided with a first installation hole in a penetrating mode, and the first rod part is connected with the side face of a seat plate of a seat through the first installation hole. A second mounting hole is formed in the tail end of the third rod part in a penetrating mode, the third rod part is connected with the side face of the seat backrest through the second mounting hole, when the seat backrest and the seat plate rotate, the second rod part and the third rod part rotate, and the requirements of different sitting postures of a user can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field especially relates to a handrail. BACKGROUND

[0002] The chair is a kind of seat with backrest, some also have armrest.

[0003] The armrest of general chair cannot be adjusted along with the rotation of chair backrest, so when user rotates chair backrest and user's sitting posture changes, fixed armrest does not meet the use requirement of user, which leads to the decline of user's use experience. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a handrail to solve the technical problem that part of the existing chair armrest cannot rotate along with backrest, which does not meet the use requirement of user.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A handrail, comprising a first rod part, a second rod part is slidably adjusted on the outer periphery of the first rod part, a third rod part is rotatably arranged at one end of the second rod part, a first mounting hole is formed through the end of the first rod part, the first rod part is connected with the side of chair seat plate through the first mounting hole, a second mounting hole is formed through the end of the third rod part, the third rod part is connected with the side of chair backrest through the second mounting hole, when the chair backrest and seat plate rotate, the second rod part and the third rod part rotate.

[0007] Working principle:

[0008] When user adjusts backrest, the third rod part moves along with the rotation of backrest, and the connection part of the third rod part and the second rod part rotates, so user can place arm on the third rod part;

[0009] When further adjustment is needed, the second rod part is slidably adjusted relative to the first rod part, so that the first rod part and the second rod part slide relative to each other, and after adjustment is completed, the first rod part and the second rod part are fixed.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The third rod part and the second rod part can move relative to each other along with the rotation of backrest, so that user's arm can be better placed on one end of the third rod part;

[0012] 2. The first rod part and the second rod part are slid, so that the third rod part moves along with the second rod part, and the third rod part is further adjusted. DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the first end structure;

[0015] Figure 3 This is a schematic diagram of the structure from another perspective of an embodiment of the present utility model;

[0016] Figure 4 This is a cross-sectional view of the limiting rod in an embodiment of the present utility model;

[0017] Figure 5 This is a schematic diagram of the structure from another perspective of the first end;

[0018] Figure 6 This is a schematic diagram of the structure from another perspective at the second end.

[0019] In the above figures: 10, first mounting hole; 11, second sealing cover; 12, connecting shaft; 13, third mounting block; 14, third rod segment; 15, first setting hole; 16, first mounting block; 17, second sliding groove; 18, first rod segment; 19, groove; 20, protrusion; 21, limiting rod; 22, first sliding groove; 23, elastic element; 24, second rod segment; 25, first sealing cover; 26, force-bearing rod; 27, second mounting hole; 28, second setting hole; 29, annular ring; 30, buckle; 31, second mounting block. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] Example:

[0022] like Figure 1 As shown, an armrest includes a first rod, a second rod that is slidably and adjustablely sleeved on the outer periphery of the first rod, and a third rod that is rotatably provided at one end of the second rod. A first mounting hole 10 is provided through the end of the first rod, and the first rod is connected to the side of the seat plate through the first mounting hole 10. A screw with a nut is passed through the first mounting hole 10 and threadedly connected to the seat plate. A second mounting hole 27 is provided through the end of the third rod, and the third rod is connected to the side of the seat back through the second mounting hole 27. A screw with a nut is passed through the second mounting hole 27 and threadedly connected to the seat back. When the seat back and seat plate rotate, the second rod and the third rod rotate. An armrest is installed at the top of the third rod, and the user can place their arm on the armrest.

[0023] The user sits on the seat plate, when the user adjusts the backrest, the third rod part moves with the backrest, and the third rod part and the second rod part are connected to rotate, the user can put the arm on the third rod part;

[0024] When further adjustment is needed, the second rod part is adjusted by sliding relative to the first rod part, so that the first rod part and the second rod part slide with each other, and after the adjustment is completed, the first rod part and the second rod part are fixed.

[0025] As shown in Figure 2 , the first rod part includes a first mounting block 16 and a first rod segment 18, the first mounting hole 10 is throughly provided on the first mounting block 16, the first rod segment 18 is a hollow structure, and the two side end faces of the first rod segment 18 are throughly provided with first sliding grooves 22, and the two side walls of one of the first sliding grooves 22 are fixedly provided with a plurality of protrusions 20, preferably, in the embodiment, four protrusions 20 are fixedly provided on each side wall of the first sliding groove 22, that is, five positions can be adjusted, the protrusions 20 can be various shapes, such as triangular, square, etc., and in the embodiment, the protrusions 20 are trapezoidal.

[0026] As shown in Figure 5 and Figure 6 , the second rod part includes a second mounting block 31 and a second rod segment 24, the second rod segment 24 is a hollow structure, and the second rod segment 24 is slidably sleeved on the outer periphery of the first rod segment 18.

[0027] As shown in Figure 6 , the two side end faces of the second rod segment 24 are fixedly provided with annular rings 29, the two side end faces of the second rod segment 24 are throughly provided with first setting holes 15, the first setting holes 15 are provided in the corresponding annular rings 29, one side end face of the second rod segment 24 is throughly provided with two second setting holes 28, the two second setting holes 28 are provided on the two sides of the first setting hole 15, and the second setting hole 28 is provided in the annular ring 29.

[0028] As shown in Figure 3 and Figure 4As shown, the annular ring 29 with the second setting hole 28 is provided with a first closing cover 25, one end of the first closing cover 25 is fixedly provided with two buckles 30, the buckle 30 has elasticity and can be elastically deformed within a certain range, the two buckles 30 extend into the corresponding two second setting holes 28, the other annular ring 29 is provided with a second closing cover 11, one end of the second closing cover 11 close to the second rod section 24 is fixedly provided with a limiting rod 21, the limiting rod 21 passes through the two first sliding grooves 22, the two protrusions 20 on the same side of the first sliding groove 22 or the protrusion 20 and the side wall of the first sliding groove 22 cooperate to clamp the limiting rod 21, when the limiting rod 21 is between the two protrusions 20, the side surface of the two protrusions 20 fixes the limiting rod 21, when the limiting rod 21 is between the protrusion 20 and the side wall of the first sliding groove 22, the protrusion 20 and the side wall of the first sliding groove 22 cooperate to fix the limiting rod 21, recesses 19 are formed at both ends of the limiting rod 21, the recess 19 does not contact the protrusion 20, when it is needed to move the limiting rod 21 along the length direction of the first sliding groove 22, the limiting rod 21 is pushed to move close to the first closing cover 25, so that the recess 19 moves to the position of the first sliding groove 22, the limiting rod 21 is moved along the length direction of the first sliding groove 22, after moving to the corresponding position, the limiting rod 21 is pulled to move, so that the recess 19 moves away from the first sliding groove 22, the elastic member 23 is connected between the limiting rod 21 and the first closing cover 25, preferably, in the embodiment, the elastic member 23 is a spring.

[0029] Two stress rods 26 are formed in the inner wall of the second rod section 24, the first rod section 18 is provided with a second sliding groove 17 at one end, and the two stress rods 26 are slidingly arranged in the second sliding groove 17.

[0030] As shown in Figure 1 and Figure 2 The third rod part includes two third mounting blocks 13 and a third rod section 14, the third mounting block 13 is fixedly arranged at one end of the third rod section 14, the second mounting block 31 is rotatably arranged between the two third mounting blocks 13, the second mounting block 31 and the third mounting block 13 are both disc-shaped, the connecting shaft 12 passes through the two third mounting blocks 13 and the second mounting block 31, and the second installation hole 27 is formed in the end of the third rod section 14.

[0031] Working principle:

[0032] The handrail is installed at the top end of the third rod section 14, the screw rod with the nut is passed through the first installation hole 10 and is threadedly connected with the seat plate, and the screw rod with the nut is passed through the second installation hole 27 and is threadedly connected with the backrest;

[0033] The backrest is rotated relative to the seat plate, the backrest drives the third rod section 14 to rotate, the third rod section 14 drives the second rod section 24 to rotate, and the third rod section 14 rotates relative to the second rod section 24;

[0034] When the second rod segment 24 needs to be adjusted relative to the first rod segment 18, the second closure cover 11 is pressed to drive the limiting rod 21 to move close to the first closure cover 25, and the second rod segment 24 is slid to drive the limiting rod 21 to move. After the movement is completed, the second closure cover 11 is released, and the elastic member 23 drives the limiting rod 21 to restrict the second rod segment 24 relative to the first rod segment 18 again.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A handrail, characterized in that, include: A first rod portion, a second rod portion is slidably and adjustablely sleeved on the outer periphery of the first rod portion, a third rod portion is rotatably provided at one end of the second rod portion, a first mounting hole (10) is provided through the end of the first rod portion, the first rod portion is connected to the side of the seat plate through the first mounting hole (10), the end of the third rod portion is provided with a second mounting hole (27), the third rod portion is connected to the side of the seat back through the second mounting hole (27), when the seat back and seat plate rotate, the second rod portion and the third rod portion rotate.

2. The handrail according to claim 1, characterized in that: The first rod includes a first mounting block (16) and a first rod segment (18). The first mounting hole (10) is opened through the first mounting block (16). The first rod segment (18) is a hollow structure. The first sliding groove (22) is opened through both ends of the first rod segment (18). A plurality of protrusions (20) are fixed on both sides of one of the first sliding grooves (22).

3. A handrail according to claim 2, characterized in that: The second rod includes a second mounting block (31) and a second rod segment (24). The second rod segment (24) is a hollow structure and is slidably sleeved on the outer periphery of the first rod segment (18).

4. A handrail according to claim 3, characterized in that: Both ends of the second rod segment (24) are fixed with annular rings (29), and both ends of the second rod segment (24) are provided with first mounting holes (15). The first mounting holes (15) are opened in the corresponding annular rings (29). Two second mounting holes (28) are provided on one side of the second rod segment (24). The two second mounting holes (28) are opened on both sides of the first mounting holes (15). The second mounting holes (28) are opened in the annular rings (29).

5. A handrail according to claim 4, characterized in that: A first sealing cover (25) is provided inside the annular ring (29) with the second setting hole (28). Two buckles (30) are fixed at one end of the first sealing cover (25). The two buckles (30) extend into the corresponding two second setting holes (28). A second sealing cover (11) is provided inside the other annular ring (29). A limiting rod (21) is fixed at one end of the second sealing cover (11) near the second rod segment (24). The limiting rod (21) passes through two first sliding grooves (22). Two protrusions (20) on the same side of the first sliding groove (22) or the protrusions (20) cooperate with the side wall of the first sliding groove (22) to engage the limiting rod (21). The limiting rod (21) has grooves (19) at both ends. The grooves (19) do not contact the protrusions (20). An elastic element (23) is connected between the limiting rod (21) and the first sealing cover (25).

6. A handrail according to claim 3, characterized in that: The inner wall of the second rod segment (24) is provided with two force-bearing rods (26), and one end of the first rod segment (18) is provided with a second sliding groove (17). The two force-bearing rods (26) are slidably disposed in the second sliding groove (17).

7. A handrail according to claim 3, characterized in that: The third rod portion includes two third mounting blocks (13) and a third rod segment (14). The third mounting block (13) is fixed at one end of the third rod segment (14). The second mounting block (31) is rotatably disposed between the two third mounting blocks (13). The connecting shaft (12) passes through the two third mounting blocks (13) and the second mounting block (31).

8. A handrail according to claim 7, characterized in that: The second mounting hole (27) is opened at the end of the third rod segment (14).

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