Office chair armrest

Abstract

An office chair armrest comprises an armrest frame, a sleeve, a lifting mechanism, an armrest position supporting plate, a supporting plate rotating structure, an armrest position and an armrest position sliding and rotating integrated structure. Due to the fact that the tail portion of the handrail position supporting plate is connected with the sleeve, 360-degree rotation of the supporting plate is achieved through the supporting plate rotating structure, the front portion of the handrail position supporting plate is connected with the handrail position, and linear sliding and 360-degree horizontal rotation of the handrail position are controlled through the handrail position sliding and rotating integrated structure, the handrail position sliding and rotating integrated structure has the current common functions of lifting, transverse sliding and 360-degree rotation. The rotating structure of the supporting plate rotating structure and the rotating structure of the armrest position sliding and rotating integrated structure can be rotated at the same time to adjust the armrest position backwards as much as possible, so that a person lying on the backrest to have a rest puts the hands on the armrest position closer to the body, and the hands are supported by the armrest position more comfortably; therefore, the armrest can be better applied to the office chair of which the backrest can be unfolded to be in a semi-lying state, so that the armrest is more reasonable in structure and can be applied to the office chair in a wider range.

Description

Technical Field

[0001] The utility model relates to an office chair, in particular to an armrest installed on the office chair. Background Art

[0002] As we know, according to the installation positions, there are mainly the following two types of armrests for office chairs:

[0003] One type is installed and fixed to both sides of the backrest. For example, an office chair with the patent publication number CN217695727U. The main feature of this type of armrest is that it can be folded upwards and horizontally laid flat and opened.

[0004] The other type is installed and fixed to the bottom of both sides of the seat. This type of armrest can often be adjusted in height, and the armrest position can slide horizontally and rotate 360 degrees horizontally to meet the needs of users at different times. Since this method has more functions and wider applicability, it is more commonly used in office chairs. For example, an office chair armrest with height adjustability with the patent publication number CN 218791388U, and an office chair armrest with a new structure with the patent publication number CN 220832442U. In actual application, the applicant found that: for this type of armrest currently installed and fixed to the seat, when applied to an office chair whose backrest can be unfolded into a semi-reclined state, even if the armrest position is made to approach the backrest as much as possible by horizontally sliding and rotating 180 degrees horizontally, the armrest position is still relatively far from the backrest. Therefore, for a person resting on the backrest, when his hand is placed on the armrest position that is far from his body, it will be less comfortable. Therefore, the current type of armrest has a narrow range of use (often only applicable to office chairs whose backrests cannot be unfolded into a semi-reclined state), and it is necessary to improve it. Summary of the Invention

[0005] The purpose of the utility model is to provide an office chair armrest with a more reasonable structure and applicable to a wider range of office chairs.

[0006] In order to solve the above-mentioned existing technical problems, the utility model adopts the following technical solutions:

[0007] An office chair armrest includes an armrest frame, a sleeve, a lifting mechanism, an armrest position tray, a tray rotating structure, an armrest position, and an integrated sliding and rotating structure for the armrest position, wherein:

[0008] The armrest frame is in an L shape;

[0009] After the sleeve is vertically sleeved outside the straight rod of the armrest frame, it is adjusted in height by the lifting mechanism;

[0010] After the tail of the armrest position tray is arranged at the top of the sleeve, the 360-degree rotation of the tray is controlled by the tray rotating structure;

[0011] The armrest position is provided on the front part of the armrest position support plate, and the horizontal sliding and 360-degree rotation of the armrest position are controlled by the integrated sliding and rotating structure of the armrest position.

[0012] In the improvement scheme of the above office chair armrest, the support plate rotation structure includes a support plate support seat provided on the sleeve, a support plate rotation positioning pin and a pin return spring provided in the support plate support seat, and a plurality of pin positioning holes provided in the armrest position support plate; the support plate support seat and the armrest position support plate are rotatably connected together; the pin positioning holes are evenly distributed on a 360-degree circumference, and every time the armrest position support plate rotates by an angle, the support plate rotation positioning pin slides from the pin positioning hole where it is located to the next pin positioning hole.

[0013] In the improvement scheme of the above office chair armrest, the integrated sliding and rotating structure of the armrest position includes a sliding guide block, a sliding pin, a sliding pin return spring, a rotating block, a rotating block positioning pin and a rotating positioning spring; a sliding guide groove for placing the sliding guide block is provided in the armrest position; a plurality of sliding pin positioning grooves are provided on the side wall in the sliding direction of the sliding guide groove; a transverse groove, a straight groove and a rotating block accommodating groove communicating with the straight groove are provided in the sliding guide block; after the sliding pin and the sliding pin return spring are provided in the transverse groove, the exposed end of the sliding pin slides into a corresponding sliding pin positioning groove under the action of the sliding pin return spring; a plurality of circumferentially distributed rotating positioning grooves are provided on the outer peripheral wall of the rotating block; after the rotating block is provided in the rotating block accommodating groove of the sliding guide block, it is integrally connected to the armrest position support plate through a rotating shaft; after the rotating block positioning pin and the rotating positioning spring are provided in the straight groove, the exposed end of the rotating block positioning pin slides into a corresponding rotating positioning groove under the action of the rotating positioning spring; when the armrest position rotates, the rotating block positioning pin slides from the rotating positioning groove where it is located to an adjacent rotating positioning groove.

[0014] In the improvement scheme of the above office chair armrest, there are two rows of the sliding pin positioning grooves; and there are two sliding pins.

[0015] In the improvement scheme of the above office chair armrest, the rotating block accommodating groove is located in the middle of the straight groove to divide the straight groove into two sections; there are two rotating block positioning pins and two rotating positioning springs respectively, and each rotating block positioning pin and rotating positioning spring is provided in one section of the straight groove.

[0016] In the improvement scheme of the above office chair armrest, the lifting mechanism includes a lifting control member, a lifting control member return spring and a lifting sliding pin arranged in the straight rod of the armrest frame, and a lifting button arranged in the button hole of the sleeve; a lifting sliding pin vertical chute and a plurality of lifting lock grooves arranged vertically along the lifting sliding pin vertical chute are provided on the straight rod of the armrest frame; the upper end of the lifting control member is swing-connected to the armrest position support plate, the lower end is connected to the lifting sliding pin, and a button seat connected to the lifting button is arranged in the middle; after the lifting control member is reset under the action of the lifting control member return spring, the lifting sliding pin slides into a corresponding lifting lock groove; when the lifting button is pressed to overcome the acting force of the lifting control member return spring, the lifting control member swings, so that the lifting sliding pin slides out of the corresponding lifting lock groove.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: Since the tail of the armrest position support plate is connected to the sleeve and the 360-degree rotation of the support plate is realized by the support plate rotation structure, and the front part is connected to the armrest position and the linear sliding and 360-degree horizontal rotation of the armrest position are controlled by the integrated sliding and rotating structure of the armrest position. In this way, in addition to having the functions of lifting, lateral sliding and 360-degree rotation of the armrests that are commonly installed and fixed on both sides of the seat at present, the rotation structures of the support plate rotation structure and the integrated sliding and rotating structure of the armrest position can be rotated simultaneously to adjust the armrest position as far back as possible (i.e., towards the backrest direction of the office chair). Then, the hands of the person resting on the backrest can be placed on the armrest position closer to the body, and the hands can be more comfortably supported by the armrest position, so that the armrest can be better applied to the office chair whose backrest can be unfolded to a semi-reclined state. Therefore, the structure of the present utility model is more reasonable and can be applied to a wider range of office chairs (both for office chairs whose backrests can be unfolded to a semi-reclined state and for office chairs whose backrests cannot be unfolded to a semi-reclined state).

[0018] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific embodiments: Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic of an embodiment of the present utility model Figure 1 (in normal office use);

[0020] Figure 2 is a three-dimensional schematic of an embodiment of the present utility model Figure 2 (when the armrest position is adjusted to the farthest from the backrest of the office chair);

[0021] Figure 3 is a three-dimensional schematic of an embodiment of the present utility model Figure 3 (when the armrest position is adjusted to the closest to the backrest of the office chair);

[0022] Figure 4Is a three-dimensional schematic of an embodiment of the present utility model Figure 4 (When the armrest position turns to the seat);

[0023] Figure 5 Is a partial assembly schematic of an embodiment of the present utility model Figure 1 (Mainly an assembly schematic of the integrated sliding and rotating structure of the armrest position);

[0024] Figure 6 Is a partial assembly schematic of an embodiment of the present utility model Figure 2 (Mainly an assembly schematic of the rotating structure of the tray);

[0025] Figure 7 Is a partial assembly schematic of an embodiment of the present utility model Figure 3 (Mainly an assembly schematic of the lifting structure of the armrest position). Detailed implementation manners

[0026] An office chair armrest, as Figures 1 to 7 shown, includes an armrest frame 1, a sleeve 2, a lifting mechanism 3, an armrest position tray 4, a tray rotating structure 5, an armrest position 6, and an integrated sliding and rotating structure 7 of the armrest position. Among them:

[0027] The armrest frame 1 is L-shaped;

[0028] After the sleeve 2 is vertically sleeved outside the straight rod 11 of the armrest frame 1, it is adjusted up and down by the lifting mechanism 3; this operation is basically the same as the height adjustment of the armrests of common office chairs on the market;

[0029] After the tail of the armrest position tray 4 is arranged at the top of the sleeve 2, the 360-degree rotation of the tray is controlled by the tray rotating structure 5; the purpose is to increase the displacement of the armrest position tray 4 adjusted forward and backward to the seat;

[0030] The armrest position 6 is arranged on the front part of the armrest position tray 4, and the horizontal sliding and 360-degree rotation of the armrest position are controlled by the integrated sliding and rotating structure 7 of the armrest position. This sliding and rotating operation is basically the same as the sliding and rotating adjustment of the armrests of common office chairs on the market. Usually, the rotation force of the armrest position 6 is much smaller than that of the armrest position tray 4.

[0031] As can be seen from the above, since the tail of the armrest position tray 4 is connected to the sleeve 2 and the 360-degree rotation of the tray is realized by the tray rotating structure 5, and the front part is connected to the armrest position 6 and the linear sliding and 360-degree horizontal rotation of the armrest position 6 are controlled by the integrated sliding and rotating structure 7 of the armrest position. In this way, in addition to having the functions of lifting, lateral sliding and 360-degree rotation of the current common armrests fixed to both sides of the seat (such as Figure 1 , 2, in addition to the state shown in Fig. 4, the rotation structures of the tray rotation structure 5 and the armrest position sliding and rotation integrated structure 7 can also be rotated simultaneously to adjust the armrest position 6 as far back as possible (i.e., towards the backrest direction of the office chair). As shown in Figure 3 , thus, the hand of the person resting on the backrest can be placed on the armrest position 6 closer to the body, and the hand can be more comfortably supported by the armrest position 6. Therefore, in addition to being applicable to office chairs with non-expandable backrests, the armrest can also be applied to office chairs with expandable backrests that can be adjusted to a semi-reclined state. Therefore, the structure of the present utility model is more reasonable and can be applied to a wider range of office chairs.

[0032] In this embodiment, as shown in Figure 6 , the tray rotation structure 5 includes a tray support seat 51 provided on the sleeve 2, a tray rotation positioning pin 52 and a pin return spring 53 provided in the tray support seat 51, and a plurality of pin positioning holes 54 provided in the armrest position tray 4; the tray support seat 51 and the armrest position tray 4 are rotatably connected together; the pin positioning holes 54 are evenly distributed on a 360-degree circumference, and each time the armrest position tray 4 rotates an angle (equivalent to the angle between the axes of two adjacent pin positioning holes 54 and the tray support seat 51), the tray rotation positioning pin 52 slides from the pin positioning hole 54 it is in to the next pin positioning hole 54.

[0033] In this embodiment, as shown in Figure 5 , the armrest position sliding and rotation integrated structure 7 includes a sliding guide block 71, a sliding pin 72, a sliding pin return spring 73, a rotating block 74, a rotating block positioning pin 75 and a rotating positioning spring 76; a sliding guide groove 61 for placing the sliding guide block 71 is provided in the armrest position 6; a plurality of sliding pin positioning grooves 611 are provided on the side wall in the sliding direction of the sliding guide groove 61; a transverse groove 711, a straight groove 712 and a rotating block accommodation groove 713 communicating with the straight groove 712 are provided in the sliding guide block 71; after the sliding pin 72 and the sliding pin return spring 73 are provided in the transverse groove 711, the exposed end of the sliding pin 72 slides into a corresponding sliding pin positioning groove 611 under the action of the sliding pin return spring 73; a plurality of circumferentially distributed rotating positioning grooves 741 are provided on the outer peripheral wall of the rotating block 74; after the rotating block 74 is provided in the rotating block accommodation groove 713 of the sliding guide block 71, it is integrally connected to the armrest position tray 4 through a rotating shaft 77; after the rotating block positioning pin 75 and the rotating positioning spring 76 are provided in the straight groove 712, the exposed end of the rotating block positioning pin 75 slides into a corresponding rotating positioning groove 741 under the action of the rotating positioning spring 76; when the armrest position 6 rotates, the rotating block positioning pin 75 slides from the rotating positioning groove 741 it is in to an adjacent rotating positioning groove 741.

[0034] Preferably, the sliding pin positioning grooves 611 have two columns; there are two sliding pins 72, which can make the sliding of the armrest position smoother, the force more balanced, and the operating experience stronger. The rotating block accommodating groove 713 is located in the middle of the straight groove 712 to divide the straight groove 712 into two sections; there are two rotating block positioning pins 75 and two rotating positioning springs 76 respectively, and each rotating block positioning pin 75 and rotating positioning spring 76 is arranged in a section of the straight groove 712. In this way, the rotation of the armrest position can also be made smoother, the force more balanced, and the operating experience stronger.

[0035] In this embodiment, as Figure 7 shown, the lifting mechanism 3 includes a lifting control member 31, a lifting control member return spring 32 and a lifting slide pin 33 arranged in the straight rod 11 of the armrest frame 1, and a lifting button 34 arranged in the button hole 21 of the sleeve 2; a lifting slide pin vertical chute 111 and a plurality of lifting lock grooves 112 arranged vertically along the lifting slide pin vertical chute 111 are provided on the straight rod 11 of the armrest frame 1; the upper end of the lifting control member 31 is swingably connected to the armrest position support plate 4, the lower end is connected to the lifting slide pin 33, and a button seat 311 connected to the lifting button 34 is arranged in the middle; after the lifting control member 31 is reset under the action of the lifting control member return spring 32, the lifting slide pin 33 slides into a corresponding lifting lock groove 112; when the lifting button 34 is pressed to make the lifting control member 31 swing against the acting force of the lifting control member return spring 32, so that the lifting slide pin 33 slides away from the corresponding lifting lock groove 112, the sleeve 2 can be lifted to adjust the height of the armrest position 6.

[0036] In this embodiment, as Figure 5 shown, the armrest position 6 includes an upper layer plate 62, a lower layer plate 63 and a soft pad 64 covering the upper layer plate 62.

[0037] In the description of the present invention, it should be understood that when terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation and positional relationship shown in the drawings or the installation and use direction of the product as the reference orientation of the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] In summary, the above is only a preferred embodiment of the present invention, and is not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the scope of the patent application of the present invention should belong to the technical scope of the present invention.

Claims

1. An office chair armrest, characterized in that: It includes an armrest frame, a sleeve, a lifting mechanism, an armrest support plate, a support plate rotating structure, an armrest, and an armrest sliding and rotating integrated structure, wherein: The handrail frame is L-shaped; After the sleeve is vertically sleeved outside the straight rod of the handrail frame, it is raised and lowered by the lifting mechanism; The tail of the armrest support plate is arranged behind the top end of the sleeve, and the support plate rotation structure controls the 360-degree rotation of the support plate; The armrest is arranged on the front part of the armrest support plate, and the horizontal sliding and 360-degree rotation of the armrest are controlled by the armrest sliding and rotating integrated structure.

2. The office chair armrest according to claim 1, characterized in that: The pallet rotation structure includes a pallet support seat arranged on the sleeve, a pallet rotation positioning pin and a pin return spring arranged in the pallet support seat, and a plurality of pin positioning holes arranged in the armrest pallet; the pallet support seat and the armrest pallet are connected together so as to be relatively rotatable; the pin positioning holes are evenly distributed on a 360-degree circumference, and every time the armrest pallet rotates an angle, the pallet rotation positioning pin slides from the pin positioning hole where it is located to the next pin positioning hole.

3. The office chair armrest according to claim 1 or 2, characterized in that: The armrest sliding and rotating integrated structure comprises a sliding guide block, a sliding pin, a sliding pin return spring, a rotating block, a rotating block positioning pin and a rotating positioning spring; a sliding guide groove for accommodating the sliding guide block is provided in the armrest; a plurality of sliding pin positioning grooves are provided on the side wall in the sliding direction of the sliding guide groove; a transverse groove, a straight groove and a rotating block accommodating groove communicating with the straight groove are provided in the sliding guide block; after the sliding pin and the sliding pin return spring are arranged in the transverse groove, the exposed end of the sliding pin slides into a corresponding sliding groove under the action of the sliding pin return spring. The movable pin is positioned in the positioning groove; a plurality of rotation positioning grooves distributed in a circumference are provided on the outer peripheral wall of the rotating block; after the rotating block is arranged in the rotating block accommodating groove of the sliding guide block, it is connected to the armrest support plate as a whole through the rotating shaft; after the rotating block positioning pin and the rotation positioning spring are arranged in the straight groove, the rotating block positioning pin slides into a corresponding rotation positioning groove at its exposed end under the action of the rotation positioning spring; when the armrest rotates, the rotating block positioning pin slides from the rotation positioning groove where it is located to an adjacent rotation positioning groove.

4. The office chair armrest according to claim 3, characterized in that: The sliding pin positioning grooves have two rows; the sliding pins have two.

5. The office chair armrest according to claim 3, characterized in that: The rotating block accommodating groove is located in the middle of the straight groove to divide the straight groove into two sections; there are two rotating block positioning pins and two rotating positioning springs, and each rotating block positioning pin and each rotating positioning spring is arranged in one section of the straight groove.

6. The office chair armrest according to claim 1 or 2, characterized in that: The lifting mechanism comprises a lifting control member, a lifting control member return spring and a lifting pin arranged in the straight rod of the armrest frame, and a lifting button arranged in the button hole of the sleeve; a lifting pin vertical slide groove and a plurality of lifting lock grooves arranged vertically along the lifting pin vertical slide groove are arranged on the straight rod of the armrest frame; the upper end of the lifting control member is swingably connected to the armrest support plate, the lower end is connected to the lifting pin, and the middle part is provided with a button seat connected to the lifting button; after the lifting control member is reset under the action of the lifting control member return spring, the lifting pin slides into a corresponding lifting lock groove; when the lifting button is pressed, the lifting control member overcomes the action force of the lifting control member return spring and then swings, so that the lifting pin slides away from the corresponding lifting lock groove.

Images