Seat armrest capable of being movably adjusted

Abstract

A seat armrest capable of being movably adjusted comprises an installation base and a lifting base movably connected to the installation base, an armrest frame is arranged above the lifting base, a movable armrest supporting plate is arranged on the armrest frame and comprises a lower shell and an upper cover body covering the lower shell, a sliding way is arranged in the middle of the bottom of the lower shell in a penetrating mode, and a sliding groove is formed in the middle of the sliding way. Two rotatable rotating arms which are symmetrically distributed left and right are arranged in the armrest frame, the non-rotating connecting ends of the rotating arms are provided with inserting columns which penetrate through the sliding ways and extend to the inner cavity of the lower shell, fixing bases are inserted into the parts, extending to the inner cavity of the lower shell, of the inserting columns, and shielding structures are arranged on the outer side walls of the fixing bases; the shielding structure is used for shielding part of the slide way. The child armrest supporting plate has the advantages that part of the sliding ways are shielded through the shielding structures, so that fingers of a child can be prevented from stretching into the armrest supporting plate through the sliding ways when the child drives the armrest supporting plate to move, and the potential safety hazard that the fingers are clamped does not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a movable and adjustable seat armrest. Background Art

[0002] A chair is a kind of furniture for daily life, a kind of seat with a backrest and armrests. The structure of a chair generally includes: a support leg and a seat cushion connected to the support leg, and a backrest support connected to the seat cushion or the support leg, a backrest and a lumbar support are installed on the backrest support, and an armrest is installed on the seat cushion.

[0003] Publication (announcement) number: CN220458982U discloses a chair armrest, including a mounting seat and a sleeve shell connected to the mounting seat, the top of the sleeve shell is provided with a rotating part rotatably connected to the sleeve shell, the rotating part is provided with a fixed seat rotatably connected to the rotating part, and the fixed seat is outerly connected with a main body slidably connected to the fixed seat; an adjusting mechanism for adjusting the height of the sleeve shell is provided in the sleeve shell, a supporting part connected thereto is provided on the mounting seat, and the adjusting mechanism is elastically snap-connected to the supporting part. The main body of this movable and adjustable seat armrest is slidable, that is, a slide groove is provided on the main body, and a positioning shaft is provided on the rotating part that passes through the slide groove and is connected to the fixed seat. The movement of the main body is achieved by the movement of the positioning shaft in the slide groove, but there is a defect, namely, the gap formed between the slide groove and the positioning shaft. The gap causes a safety hazard in the movable and adjustable seat armrest. The safety hazard lies in that when children operate the movement of the main body, children cannot grasp the upper end of the main body stably because of their small palms, and choose to buckle their fingers into the gap to grasp the lower end of the main body. Then, after the main body moves, the distance between the end of the slide groove and the fixed seat will gradually decrease. In this case, fingers will be pinched. Moreover, children will increase the moving speed of the main body due to the fun of moving the main body, so the force of pinching fingers will also increase. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a movable and adjustable chair armrest to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve its technical problems: this movable and adjustable chair armrest comprises a mounting seat and a lifting seat movably connected to the mounting seat, an armrest frame is arranged above the lifting seat, a movable armrest support plate is arranged on the armrest frame, the armrest support plate comprises a lower shell body and an upper cover body covering the lower shell body, a slide is arranged through the center position of the bottom of the lower shell body, two rotatable rotating arms which are symmetrically distributed on the left and right are arranged in the armrest frame, a non-rotating connecting end of the rotating arm is provided with a plug column which passes through the slide and extends to the inner cavity of the lower shell body, a fixing seat is inserted on the part of the plug column extending to the inner cavity of the lower shell body, a shielding structure is arranged on the outer side wall of the fixing seat, and the shielding structure is used to shield part of the slide.

[0006] For further improvement, the inner cavity of the lower shell has a positioning area in the middle and guide areas symmetrically distributed on both sides of the positioning area. The width of the positioning area is greater than the width of the guide area. The slide is located in the positioning area. The fixed seat is located in the positioning area so that after the armrest support plate moves to the required distance, it will cooperate with the fixed seat to prevent the armrest support plate from moving under non-human operation. The shielding structure moves in the guide area.

[0007] For further improvement, a number of positioning grooves located at the center are arranged on both inner side walls of the positioning area, and the positioning grooves are distributed in an array along the length direction of the lower shell body. Two elastic swing arms which are symmetrically distributed front and rear are arranged on the inner side wall of the fixed seat, and a first positioning protrusion is arranged at the connection end of the swing arm which is not connected to the fixed seat. When the first positioning protrusion is combined with any positioning groove on the corresponding side, the armrest support plate is prevented from moving freely.

[0008] For further improvement, a transition protrusion arranged on the inner wall of the positioning area is provided between two adjacent positioning grooves located on the same side, and when the first positioning protrusion abuts against the transition protrusion, the swing arm swings in a direction away from the positioning groove.

[0009] Further improvement, the transition protrusion and the positioning groove form a corrugated configuration so that the first positioning protrusion has continuity when switching positions between the transition protrusion and the positioning groove.

[0010] For further improvement, the front and rear outer side walls of the fixing seat are both provided with a second positioning protrusion located in the center, and the second positioning protrusion is combined with the positioning groove.

[0011] For further improvement, a connecting outer ear group matching the swing arm is arranged on the inner wall of the fixed seat, each connecting outer ear group has two connecting outer ears symmetrically distributed upper and lower, a fixed axis is arranged between the two connecting outer ears, the swing arm is rotatably arranged on the fixed axis and a torsion spring is arranged between the two.

[0012] Further improvement, the shielding structure is arranged as a plate body in a straight line configuration, the plate body moves in the guide area and its width is greater than the width of the slideway.

[0013] For further improvement, reinforcing ribs are provided between the plate body and the fixing seat.

[0014] The beneficial effects of the utility model are:

[0015] The utility model utilizes a shielding structure to shield part of the slide, mainly to shield the part of the armrest support plate exposed outside the armrest frame after the armrest support plate is moved. In this way, it can prevent children's fingers from extending into the armrest support plate through the slide when the armrest support plate is driven to move, and there will be no safety hazard of fingers being stuck. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram of part A;

[0019] Figure 4 For this utility model Figure 2 A partial enlarged schematic diagram of part B;

[0020] Figure 5 This is a schematic diagram of the utility model in use state when applied to a seat. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Referring to the accompanying drawings: This movable and adjustable chair armrest includes a mounting base 1 and a lifting base 2 movably connected to the mounting base 1, an armrest frame 3 is arranged above the lifting base 2, and a movable armrest support plate 4 is arranged on the armrest frame 3, the armrest support plate 4 includes a lower shell 41 and an upper cover body covering the lower shell 41, a slide 41-a is penetrated and arranged at the center position of the bottom of the lower shell 41, two symmetrically distributed and rotatable rotating arms 31 are arranged in the armrest frame 3, and a non-rotating connecting end of the rotating arm 31 is provided with a column 31-a extending through the slide 41-a to the inner cavity of the lower shell 41, and a fixed seat 5 is inserted on the part of the column 31-a extending to the inner cavity of the lower shell 41, and a shielding structure 6 is arranged on the outer wall of the fixed seat 5, and the shielding structure 6 is used to shield part of the slide 41-a. The principle of the utility model is to use the shielding structure 6 to shield part of the slide 41-a, mainly to shield the part of the armrest support plate 4 exposed outside the armrest frame 3 after the movement. In this way, it can prevent children from extending their fingers into the armrest support plate 4 through the slide 41-a when driving the armrest support plate 4 to move, and there will be no safety hazard of fingers being stuck.

[0023] The inner cavity of the lower shell 41 has a positioning area 41-b located in the middle, and guide areas 41-c symmetrically distributed on both sides of the positioning area 41-b. The width of the positioning area 41-b is greater than the width of the guide area 41-c. The slide 41-a is located in the positioning area 41-b. The fixed seat 5 is located in the positioning area 41-b so as to cooperate with the fixed seat 5 to prevent the armrest support plate 4 from moving under non-human operation after the armrest support plate 4 moves to the required distance. The shielding structure 6 moves in the guide area 41-c, as shown in FIG. This arrangement enables the lower shell 41 to have the ability to be positioned and cooperated with the fixed seat 5, so that the armrest support plate 4 can always remain in this position when the armrest support plate 4 is adjusted to the desired position, and the width of the positioning area 41-b is greater than the width of the guide area 41-c to form a step surface, and the step surface can limit the adjustable range of the armrest support plate 4, that is, it is achieved by abutting the step surface and the fixed seat 5, and the guide area 41-c extends the length of the inner cavity of the lower shell 41, that is, it will not interfere with the shielding structure 6.

[0024] A plurality of positioning grooves 41-b1 located at the center are provided on both inner side walls of the positioning area 41-b, and the plurality of positioning grooves 41-b1 are distributed in an array along the length direction of the lower shell body 41. Two front and rear symmetrically distributed and elastic swing arms 51 are provided on the inner side wall of the fixed seat 5. A first positioning protrusion 51-a is provided at the connection end of the swing arm 51 that is not connected to the fixed seat 5. When the first positioning protrusion 51-a is combined with any positioning groove 41-b1 on the corresponding side, the armrest support plate 4 is prevented from moving freely. Such a setting enables the armrest support plate 4 to have a positioning effect, that is, it is achieved by utilizing the positioning groove 41-b1 and the first positioning protrusion 51-a of the swing arm 51, so that when the armrest support plate 4 is adjusted to the desired position, the armrest support plate 4 can always be maintained at this position, and the swing arm 51 has an elastic setting to facilitate its switching in each positioning groove 41-b1.

[0025] There is a transition protrusion 41-b2 arranged on the inner side wall of the positioning area 41-b between two adjacent positioning grooves 41-b1 located on the same side. When the first positioning protrusion 51-a abuts against the transition protrusion 41-b2, the swing arm 51 swings in the direction away from the positioning groove 41-b1, that is, the transition protrusion 41-b2 is used to make the swing arm 51 swing, and the swing facilitates the first positioning protrusion 51-a of the swing arm 51 to enter the next positioning groove 41-b1.

[0026] The transition protrusion 41-b2 and the positioning groove 41-b1 form a corrugated configuration so that the first positioning protrusion 51-a has continuity when switching positions between the transition protrusion 41-b2 and the positioning groove 41-b1. Such an arrangement allows the armrest support plate 4 to switch continuously between the transition protrusion 41-b2 and the positioning groove 41-b1 when moving, and a guide slope is formed between the two. The guide slope is used to make the swing arm 51 swing gradually in the direction away from the positioning groove 41-b1 or in the direction into the positioning groove 41-b1.

[0027] The front and rear outer side walls of the fixing seat 5 are both provided with a second positioning protrusion 52 located in the center position, and the second positioning protrusion 52 is combined with the positioning groove 41-b1. The second positioning protrusion 52 is used to combine with the positioning groove 41-b1, and the combination occurs when the first positioning protrusion 51-a abuts against the transition protrusion 41-b2. This setting takes into account that there is a transition protrusion 41-b2 between two adjacent positioning grooves 41-b1. When the first positioning protrusion 51-a abuts against the transition protrusion 41-b2, it is impossible to prevent the armrest support plate 4 from moving. Assuming that the spacing distance between the two positioning grooves 41-b1 is 1+1, and the spacing distance between the positioning groove 41-b1 and the transition protrusion 41-b2 is 1, then the displacement distance of the armrest support plate 4 without the second positioning protrusion 52 is 1+1, and the displacement distance of the armrest support plate 4 with the positioning protrusion 52 is 1, thereby increasing the adjustable range of the armrest support plate 4 in this way.

[0028] A connecting outer ear group 53 matching the swing arm 51 is arranged on the inner wall of the fixed seat 5, and each connecting outer ear group 53 has two connecting outer ears 53-a symmetrically distributed in the upper and lower parts, and a fixed shaft 53-a1 is arranged between the two connecting outer ears 53-a. The swing arm 51 is rotatably arranged on the fixed shaft 53-a1 and a torsion spring is arranged between the two. Such an arrangement can make the swing arm 51 have an elastic effect, that is, it is achieved by utilizing the torsion spring. When the first positioning protrusion 51-a abuts against the transition protrusion 41-b2, the torsion spring generates twisting force, and the force is released when the first positioning protrusion 51-a enters the positioning groove 41-b1, that is, it can drive the swing arm 51 to automatically reset and swing, and such an arrangement is more durable than the method of direct injection molding on the fixed seat 5 and is not easy to break.

[0029] The shielding structure 6 is configured as a plate body 61 in a linear configuration. The plate body 61 moves in the guide area 41-c and its width is greater than the width of the slide 41-a. Such a configuration can achieve shielding of the opening of the slide 41-a in the lower shell 41, and the plate body has good flatness and can be fully fitted with the inner bottom surface of the lower shell 41.

[0030] A reinforcing rib 7 is provided between the plate body 61 and the fixing seat 5 , and the structural strength of the plate body 61 is increased by the reinforcing rib 7 , while also providing upper constraints on the plate body 61 to prevent it from bending upward when subjected to force.

[0031] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A movable and adjustable chair armrest, comprising a mounting seat (1), and a lifting seat (2) movably connected to the mounting seat (1), an armrest frame (3) being arranged above the lifting seat (2), and a movable armrest support plate (4) being arranged on the armrest frame (3), characterized in that: The armrest support plate (4) comprises a lower shell (41) and an upper cover body covering the lower shell (41); a slideway (41-a) is provided through the center position of the bottom of the lower shell (41); two rotating arms (31) symmetrically distributed on the left and right and rotatable are provided in the armrest frame (3); a plug post (31-a) is provided at the non-rotating connection end of the rotating arm (31) and extends through the slideway (41-a) to the inner cavity of the lower shell (41); a fixing seat (5) is inserted on the part of the plug post (31-a) extending to the inner cavity of the lower shell (41); a shielding structure (6) is provided on the outer wall of the fixing seat (5); the shielding structure (6) is used to shield part of the slideway (41-a).

2. The movable and adjustable chair armrest according to claim 1, characterized in that: The inner cavity of the lower shell (41) has a positioning area (41-b) located in the middle, and guide areas (41-c) symmetrically distributed on both sides of the positioning area (41-b), the width of the positioning area (41-b) is greater than the width of the guide area (41-c), the slideway (41-a) is located in the positioning area (41-b), the fixed seat (5) is located in the positioning area (41-b) to be positioned and matched with the fixed seat (5) after the armrest support plate (4) moves to a required distance to prevent the armrest support plate (4) from moving under non-human operation, and the shielding structure (6) moves in the guide area (41-c).

3. The movable and adjustable chair armrest according to claim 2, characterized in that: A plurality of positioning grooves (41-b1) located at the center are arranged on both inner side walls of the positioning area (41-b), and the plurality of positioning grooves (41-b1) are arranged in an array along the length direction of the lower shell (41). Two elastic swing arms (51) are arranged on the inner side wall of the fixing seat (5), and the connecting end of the swing arm (51) not connected to the fixing seat (5) is provided with a first positioning protrusion (51-a). When the first positioning protrusion (51-a) is combined with any of the positioning grooves (41-b1) on the corresponding side, the armrest support plate (4) is prevented from moving freely.

4. The movable and adjustable chair armrest according to claim 3, characterized in that: A transition protrusion (41-b2) is provided on the inner wall of the positioning area (41-b) between the two adjacent positioning grooves (41-b1) located on the same side, and when the first positioning protrusion (51-a) abuts against the transition protrusion (41-b2), the swing arm (51) swings in a direction away from the positioning groove (41-b1).

5. The movable and adjustable chair armrest according to claim 4, characterized in that: The transition protrusion (41-b2) and the positioning groove (41-b1) form a corrugated configuration so that the first positioning protrusion (51-a) has continuity when switching positions between the transition protrusion (41-b2) and the positioning groove (41-b1).

6. The movable and adjustable chair armrest according to claim 3, characterized in that: A second positioning protrusion (52) located at a central position is provided on both the front and rear outer side walls of the fixing seat (5), and the second positioning protrusion (52) is combined with the positioning groove (41-b1).

7. The movable and adjustable chair armrest according to claim 3, characterized in that: A connecting outer ear group (53) matching the swing arm (51) is arranged on the inner side wall of the fixing seat (5), each connecting outer ear group (53) has two connecting outer ears (53-a) symmetrically distributed in the upper and lower parts, a fixing shaft (53-a1) is arranged between the two connecting outer ears (53-a), and the swing arm (51) is rotatably arranged on the fixing shaft (53-a1) and a torsion spring is arranged between the two.

8. The movable and adjustable chair armrest according to claim 2, characterized in that: The shielding structure (6) is configured as a plate body (61) in a linear configuration; the plate body (61) moves in the guide area (41-c) and has a width greater than a width of the slideway (41-a).

9. The movable and adjustable chair armrest according to claim 8, characterized in that: A reinforcing rib (7) is provided between the plate body (61) and the fixing seat (5).

Images