Height-adjustable armrest assembly and chair including same

Abstract

The present invention relates to a height-adjustable armrest assembly and a chair including the same, and in particular to a fixed bracket part having an internal space, and a lifting part provided on an upper part of the fixed bracket part so as to be movable in an up-down direction, wherein a part of the lifting part is formed so as to rotate forward within the internal space of the fixed bracket part, which greatly improves user convenience.

Description

[Technical Field]

[0001] The present invention relates to a height adjustable armrest assembly and a chair including the same, and more particularly to a height adjustable armrest assembly and a chair including the same that can minimize user inconvenience when tilting a backrest. [Background technology]

[0002] FIG. 1 is an assembly example showing a part of a chair in which an armrest assembly according to the prior art is integrally assembled with a seat panel.

[0003] Generally, as shown in Fig. 1, a chair includes a seat plate 10 in the form of a cushion for a user to sit on, and backrests 20 disposed above and below the rear end of the seat plate 10 to support the user's back. A foot portion 30 supported on the bottom surface is provided below the seat plate 10, and armrests 40 on which the user can rest their arms may be assembled to the seat plate 10.

[0004] Here, as shown in FIG. 1, the backrest 20 is provided so that its upper end can be tilted forward and backward (preferably backward) around its lower end to improve user convenience, and the armrests 40 are also provided so that their height can be adjusted vertically to suit the height of the user.

[0005] However, in the case of a chair 1 in which the armrest assembly 40 according to the conventional technology configured as described above is integrally assembled with the seat plate, when the back plate 20 is tilted backward, the user's arms are placed at an angle backward, and since the armrest assembly 40 is provided integrally with the seat plate, the angle of the user's arms and the angle of the upper surface of the armrest assembly 40 are actually different, which causes inconvenience to the user.

[0006] Furthermore, when the back panel 20 is tilted backward, the user's arms also move backward a certain distance, but because the armrest assembly 40 is provided so that its height can be adjusted only in the vertical direction, the user's arms are relatively far away. That is, as shown in Fig. 1, the distance between the back panel 20 and the armrest assembly 40 is "D1" before tilting the back panel 20, but when the back panel 20 is tilted, the distance becomes "D2," which may cause the user's arms to get caught or cause the user inconvenience described above.

[0007] Furthermore, although not shown in the drawings, even if the armrest assembly 40 is provided so that it can slide back and forth while tilting, a gap may occur between the tilting arm pad portion of the armrest assembly 40 that is tilted and the fixing bracket portion that fixes it when tilted, and the user's fingers or other parts of the body may be caught in the gap, resulting in injury. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been devised to solve the above-mentioned technical problems, and an object of the present invention is to provide an armrest assembly and a chair including the same, in which the height can be adjusted so that the tilting angle can be adjusted by sliding the tilting arm pad portion of the armrest assembly forward and backward in accordance with the tilting angle of the back panel portion.

[0009] Another object of the present invention is to provide a height-adjustable armrest assembly and a chair including the same, which can prevent injury to the user by being designed with a structure in which the safety cover part is linked only to the tilt movement when the tilting arm pad part tilts and slides.

[0010] The technical problems of the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0011] One embodiment of the height-adjustable armrest assembly according to the present invention includes a fixed bracket part having an internal space, and a lifting part provided on an upper part of the fixed bracket part so as to be movable in an up-down direction, and the lifting part is formed so that a part of a rotation lock part that is engaged with or disengaged from the fixed bracket part rotates forward within the internal space of the fixed bracket part.

[0012] Here, the lifting part includes a lifting box that is provided in the internal space of the fixed bracket part so as to be movable in the vertical direction, a lifting body that is integrally formed on the upper part of the lifting box, and a lifting button part that is provided on the lifting body and is pushed to rotate by an external force provided by a user, and the rotation lock part may be formed so that a lock pin within a rotation radius protrudes toward the front end side of the lifting body in conjunction with the lifting button part.

[0013] The lifting button portion may be interlockably connected via a lifting connecting member that connects the rotation lock portion.

[0014] In addition, the internal space of the fixed bracket portion may be provided with a locking case that covers one side of the lifting box and has a plurality of locking holes spaced apart in the vertical direction, into which the lock pin of the rotation lock portion is inserted and locked, and a guide panel that covers the other side of the lifting box and has a pair of lifting guide slots formed therein to guide the vertical movement of the lifting box within the internal space of the fixed bracket portion.

[0015] In addition, the plurality of locking holes formed in the locking case may be formed in a portion of the fixing bracket portion that contacts the inner surface of the front end portion, and the rotation lock portion may rotate the lock pin in the front-rear direction around a rotation point set in the left-right direction.

[0016] In addition, when the guide panel and the locking case are connected to each other, a hook engaging end formed to protrude outward from the outer surface of the lower end of the guide panel may be hook-fastened to a hook fastening groove provided inside the fixing bracket portion.

[0017] In addition, the lifting connecting member may have an upper end connected to an inner end of the lifting button portion positioned inside the lifting body, and a lower end connected to a portion of the rotation lock portion that is spaced a predetermined distance from the rotation point of the rotation lock portion.

[0018] In addition, an elastic member may be interposed in the rotation lock portion, which elastically restores the rotation lock portion to its original position depending on whether an external force from a user is applied via the lifting connecting member.

[0019] In addition, when the user releases the lifting button, the elastic member can be inserted into one of a plurality of locking holes formed at intervals in the vertical direction at the front end of the locking case to provide elastic force in the direction of locking.

[0020] The fixed bracket portion may be fixed to both left and right ends of the seat plate portion, and the internal space of the fixed bracket portion may be formed to open upward.

[0021] A chair according to one embodiment of the present invention includes a seat panel on which a user sits, a pair of armrest assemblies provided at both left and right ends of the seat panel and on which the user can rest their arms, and a back panel provided at a rear end of the seat panel, the upper end of which is tiltable in the front-to-rear direction around the lower end, the pair of armrest assemblies including fixed bracket parts fixed to both left and right ends of the seat panel and having an internal space that is open to the top, and lifting parts provided above the fixed bracket parts so as to be movable in the up-down direction, the lifting parts being provided in the internal space of the fixed bracket parts so as to be movable in the up-down direction. a lifting box; a lifting body integrally formed on an upper portion of the lifting box; a lifting button portion partially exposed to the outside of the lifting body and configured to be pushed and rotated by an external force provided by a user; a rotation lock portion interlocked with the lifting button portion to be engaged or disengaged with respect to the fixed bracket portion; and a lifting connecting member connecting the lifting button portion and the rotation lock portion, wherein the rotation lock portion may have a lock pin protruding from a front end portion of the lifting body and configured to be engaged or disengaged with respect to the fixed bracket portion. [Effects of the Invention]

[0022] According to an armrest assembly and a chair including the same according to one embodiment of the present invention, the tilting arm pad portion of the armrest assembly is slid forward and backward in response to the tilting angle of the back panel portion, thereby adjusting the inclination angle. When the tilting arm pad portion tilts and slides, the safety cover portion is designed to be linked only to the tilt movement, thereby preventing injury to the user. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is an assembly example showing a part of a chair in which an armrest assembly according to the prior art is integrally assembled with a seat panel. [Figure 2]1 is a perspective view showing a portion of the exterior of an armrest assembly and a chair including the armrest assembly according to an embodiment of the present invention; [Figure 3] FIG. 10 is a perspective view showing how an armrest assembly is connected to a seat panel portion. [Figure 4] FIG. 4 is a side view of FIG. 3. [Figure 5] FIG. 3 is a perspective view showing an armrest assembly in the configuration of FIG. 2. [Figure 6a] 6 is an exploded perspective view of the armrest assembly of the configuration of FIG. 5, viewed from one side and the other side. [Figure 6b] 6 is an exploded perspective view of the armrest assembly of the configuration of FIG. 5, viewed from one side and the other side. [Figure 7] 6A and 6B are cutaway perspective and cross-sectional views showing the internal configuration of a lifting section and a tilting arm pad section in the configuration of FIG. 5. [Figure 8] 6A and 6B are cutaway perspective and cross-sectional views showing the internal configuration of a lifting section and a tilting arm pad section in the configuration of FIG. 5. [Figure 9] 6 is a cross-sectional view showing the tilt and slide modes of the tilting arm pad portion and the safety cover portion of the configuration of FIG. 5. FIG. [Figure 10] 6 is a cross-sectional view showing the state of height adjustment by a lifting section in the configuration of FIG. 5. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a height-adjustable armrest assembly and a chair including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0025] In assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0026] In describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are used merely to distinguish the component from other components and do not limit the nature, order, or procedure of the components. Furthermore, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0027] Figure 2 is a perspective view showing an armrest assembly according to one embodiment of the present invention and a portion of the appearance of a chair including the same, Figure 3 is a perspective view showing how the armrest assembly is connected to the seat plate, Figure 4 is a side view of Figure 3, Figure 5 is a perspective view showing the armrest assembly in the configuration of Figure 2, and Figures 6a and 6b are exploded perspective views of one side and the other side of the armrest assembly in the configuration of Figure 5.

[0028] As shown in Figures 2 to 4, a chair 1 according to one embodiment of the present invention includes a seat panel 300 on which a user sits, a backrest 400 tiltable in the front-to-rear direction (preferably rearward) at the rear end of the seat panel 300 and supporting the user's back, a foot section (not shown, see reference numeral 30 in Figure 1) at the lower end of the seat panel 300 and supported on the bottom surface, and a pair of armrest assemblies 100 connected to both left and right ends of the seat panel 300.

[0029] For ease of explanation, the pair of armrest assemblies 100 are identical in configuration except that they are formed symmetrically in the left-right direction. Therefore, in the view of FIG. 2, the description of the armrest assembly 100 provided at the left end of the seat panel portion 300 will replace the description of the armrest assembly provided at the right end.

[0030] As shown in Figures 2 to 6b, the pair of armrest assemblies 100 are provided with seat connecting blocks 130 at their horizontally extending lower ends, and can be firmly fixed to both ends of the left and right lower surfaces of the seat panel portion 300 using fastening members (not shown) as an intermediary.

[0031] As shown in Figures 2 to 6b, the armrest assembly 100 according to one embodiment of the present invention includes a fixed bracket portion 141 fixed to both left and right ends of the seat panel portion 300 and having an internal space 141s that is open upward, a lifting portion 150 provided on the upper portion of the fixed bracket portion 141 so as to be movable in the vertical direction, a tilting arm pad portion 140 provided on the upper end of the lifting portion 150 so as to be tiltable in the forward and backward directions, and a safety cover portion 210 that is linked when the tilting arm pad portion 140 is tilted and is not linked when the tilting arm pad portion 140 is slid, and that covers the space between the lifting portion 150 and the tilting arm pad portion 140.

[0032] Here, the armrest assembly 100 according to one embodiment of the present invention may further include a tilting coupling part (not shown) that interconnects the lifting part 150 and the tilting arm pad part 140 and tilts the tilting arm pad part 140 together with the safety cover part 210 around an arbitrary tilting rotation point, or slides the tilting arm pad part 140 alone in the forward and backward directions.

[0033] As shown in Figures 6a and 6b, the fixing bracket portion 141 may have a lower portion centered on the middle portion that extends toward the lower surface of the seat panel portion 300 so that the aforementioned seat connecting block 130 is connected horizontally, and an upper portion centered on the middle portion that is curved and extends upward to form the internal space 141s.

[0034] That is, the fixed bracket part 141 is bent into an "L" shape, and the lower end of the horizontal part is connected to the lower part of the seat plate part 300 via the seat connecting block 130, and the internal space 141s corresponding to the upper end of the vertical part is connected to the lifting part 150 so that the height can be adjusted by moving it up and down.

[0035] The lower end of the lifting part 150 may be fitted into the upper part of the internal space 141s of the fixing bracket part 141, except for the upper end thereof. The lifting part 150 is configured to be movable in the vertical direction within the range of the internal height defined by the internal space 141s of the fixing bracket part 141, thereby enabling the overall height of the armrest assembly 100 according to an embodiment of the present invention to be adjusted.

[0036] More specifically, the lifting unit 150 may include a lifting box 151 that forms an installation space in which the pivot lock unit 154 and the lifting connecting member 155 described later are provided, as shown in Figures 6a and 6b.

[0037] The internal space 141s of the fixed bracket part 141 may be fitted with a locking case 152 which is provided to surround one side of the lifting box 151 and has a plurality of locking holes 152a formed in the vertical direction so that the lock pin 154a of the rotation lock part 154 can be inserted and locked, and a guide panel 153 which is provided to surround the other side of the lifting box 151 and is fixed to the fixed bracket part 141 and has a lifting guide slot 153a formed therein to guide the vertical movement of the lifting box 151.

[0038] Here, the lock pin 154a of the rotation lock portion 154 may be a part provided within the rotation radius of the rotation lock portion 154, and may be formed to rotate forward within the internal space 141s of the fixed bracket portion 141.

[0039] A hook engaging end 153b may be provided to protrude from the outer surface of the lower end of the guide panel 153, and a hook fastening groove (not shown) into which the hook engaging end 153b is hook-fastened may be provided on the lower side of the internal space 141s of the fixing bracket part 141.

[0040] That is, the locking case 152 and the guide panel 153 are connected to each other, and the hook engaging end 153b formed on the outer surface of the lower end of the guide panel 153 to protrude outward may be hook-fastened to a hook fastening groove provided on the inside of the lower end of the internal space 141s of the fixed bracket part 141.

[0041] The guide panel 153 can serve to guide the up and down movement of the lifting box 151, which moves up and down when the height of the tilting arm pad unit 140, which will be described later, is adjusted.

[0042] For this purpose, the guide panel 153 has a pair of lifting guide slots 153a formed long in the vertical direction and spaced apart in the front-to-back direction, and the other side of the lifting box 151 covered by the guide panel 153 may have a pair of lifting guide protrusions 151a formed thereon, each of which is inserted into a pair of lifting guide slots 153a.

[0043] 6a and 6b, a lifting body 144 may be integrally formed on the upper end of the lifting box 151. The lifting body 144 is a portion to which the tilting arm pad unit 140 is connected at its upper end via a pivot coupling unit 220 and a pivot link unit 230 (described later) so as to be capable of tilting or sliding.

[0044] More specifically, the tilting arm pad unit 140 may be coupled to the upper end of the lifting body 144 via a tilting coupling unit (reference numeral not shown) including a pivot coupling unit 220 and a pivot link unit 230 .

[0045] As shown in Figures 2 to 6b, the tilting coupling portion is formed integrally with the lifting body 144 (described later) of the lifting portion 150, and may include a pivot coupling portion 220 formed in a hinge shape that protrudes upward to provide a tilting rotation point for the tilting arm pad portion 140, and a pivot link portion 230 whose lower end is hinged to a hinge fixing point 230F inside the lifting portion 150 and whose upper end rotates vertically based on the hinge fixing point 230F at the lower end in response to the application of an external force, thereby causing the front end of the tilting arm pad portion 140 to rotate vertically.

[0046] More specifically, as shown in Figures 6a and 6b, the tilting arm pad portion 140 may include a connection pad 145a that is connected to the upper end of the lifting portion 150, a support pad 145b that is connected to the top of the connection pad 145a and supports the user's arm, and an inner pad 145c that is connected between the connection pad 145a and the support pad 145b and mediates the connection of the support pad 145b to the connection pad 145a.

[0047] Here, the connection pad 145a may have a rear end slot 146 formed thereon to guide the tilting arm pad portion 140 when it slides forward and backward based on the pivot connection portion 220 integrally formed at the upper end of the lifting body 144.

[0048] A hinge-shaped upper end portion of the pivoting coupling part 220, which forms a tilting rotation point, is inserted into the rear end slot 146, and a support wheel (not shown) may be provided at the upper end of the pivoting coupling part 220. The support wheel is engaged with the rear end slot 146 in the tilting direction of the coupling pad 145a and rotates when the coupling pad 145a slides in the sliding direction.

[0049] More specifically, the rear end slot 146 may be formed with steps at both left and right ends so that a pair of support wheels can be locked in the tilting direction, and may be formed long in the front-rear direction. Here, the support wheels provided in the rotation coupling part 220 provide an arbitrary tilting rotation point within the range of the rear end slot 146 when the tilting arm pad part 140 tilts up and down, and guide the sliding movement of the tilting arm pad part 140 a predetermined distance in the front-rear direction within the range of the rear end slot 146 when the tilting arm pad part 140 slides in the front-rear direction.

[0050] At least one elastic member 221 may be interposed in the pivot joint 220. The at least one elastic member 221 is compressed by an external force applied by the user when the user tilts the backrest 120 backward and naturally pushes the rear end of the tilting arm pad unit 140 with their elbow or pulls the tilting arm pad unit 140 backward with their hand, and then, when the external force is removed, the elastic member 221 applies an elastic force that restores the tilted tilting arm pad unit 140 to its original position.

[0051] The support pad 145b and the inner pad 145c cover the upper part of the connection pad 145a when the pivot connection part 220 and the pivot link part 230 are inserted and connected to the connection pad 145a, thereby preventing the pivot connection part 220 and the pivot link part 230 from being observed from the outside and preventing a deterioration in the appearance.

[0052] Meanwhile, the pivot link portion 230 may be configured such that the pivot push portion 230R, which is the upper end portion, is supported on the lower surface of the inner pad 145c of the tilting arm pad portion 140, with the lower end portion connected to the hinge fixing point 230F, which is provided to be connected to the upper end portion of the lifting body 144, as the center.

[0053] Here, the front end of the tilting arm pad unit 140 is lifted up or lowered down by an angle corresponding to the rotation of the rotation push unit 230R of the rotation link unit 230, thereby allowing for vertical tilt movement.

[0054] In this way, the tilting arm pad unit 140 tilts and rotates up and down at the portion corresponding to the relatively front end by the pivot link unit 230, centering on the upper end of the pivot connection unit 220, which forms an arbitrary tilting rotation point located relatively at the rear end, and can slide forward and backward within the limit allowed by the above-mentioned rear end slot 146, when the user pushes the rear end of the tilting arm pad unit 140 with their elbow or pulls it backward with their elbow resting on it.

[0055] Meanwhile, the armrest assembly 100 according to one embodiment of the present invention may further include a safety cover part 210 that hides the pivot joint part 220 and the pivot link part 230 from the outside and covers the space between the lifting part 150 and the tilting arm pad part 140, as shown in Figures 2 to 6b.

[0056] The safety cover part 210 is coupled to the tilting arm pad part 140 by a guide protrusion 240 that protrudes upward and is inserted into the tilting arm pad part 140, and can tilt in conjunction with the tilt movement of the tilting arm pad part 140.

[0057] More specifically, the aforementioned guide protrusion 240 is inserted into the coupling pad 145a of the tilting arm pad portion 140, and a sliding guide slot 148 may be formed long in the front-to-rear direction so as to be engaged in the tilting direction of the tilting arm pad portion 140 and inserted so as not to interfere in the sliding direction.

[0058] The guide protrusion 240 provided on the safety cover part 210 may be fastened to a protrusion fastening end 240h provided on the upper end of the safety cover part 210.

[0059] Here, as described above, the guide protrusion 240 may be engaged with both left and right ends of the sliding guide slot 148 during the up-down tilt movement of the tilting arm pad unit 140, and the safety cover unit 210 may tilt in conjunction with the guide protrusion 240. For this purpose, it is preferable that the width of the lower end of the sliding guide slot 148, which opens toward the protrusion fastening end 240h, is smaller than the outer diameter of the roller-shaped guide protrusion 240.

[0060] Therefore, the safety cover part 210 is engaged with the tilting arm pad part 140 in the tilting direction by the guide protrusion 240, and in the sliding direction is not interfered with by the sliding guide slot 148, allowing the tilting arm pad part 140 to slide relatively, thereby not being linked to the sliding movement of the tilting arm pad part 140.

[0061] In this way, the safety cover part 210 tilts in conjunction with the tilting arm pad part 140 in the tilting direction of the tilting arm pad part 140, and completely blocks the space between the tilting arm pad part 140 and the lifting part 150 (especially the lifting body part 144), thereby preventing the user's fingers and other body parts from getting pinched. However, the safety cover part 210 does not need to be interlocked when the tilting arm pad part 140 slides forward and backward, and the safety cover part 210 has a non-interference structure with the sliding guide slot 148 so that the sliding movement of the tilting arm pad part 140 is not interfered with.

[0062] Here, it is preferable that the safety cover part 210 is formed to have a size that covers at least the distance between the front ends of the tilting arm pad part 140 and the lifting part 150 when tilted in conjunction with the tilting arm pad part 140.

[0063] Meanwhile, a U-shaped safety space S that opens rearward may be formed between the upper end of the lifting unit 150 and the rear end of the safety cover unit 210. The U-shaped safety space S serves as a safety space to prevent a user's body parts from being pinched and injured when the tilting arm pad unit 140 slides rearward and the rear end of the tilting arm pad unit 140 approaches the backrest unit 120, regardless of whether the backrest unit 120 is tilted or not.

[0064] Figures 7 and 8 are cutaway perspective views and cross-sectional views showing the internal structure of the lifting section and tilting arm pad section of the configuration of Figure 5, Figure 9 is a cross-sectional view showing the tilt and slide manner of the tilting arm pad section and safety cover section of the configuration of Figure 5, and Figure 10 is a cross-sectional view showing the manner of height adjustment by the lifting section of the configuration of Figure 5.

[0065] As shown in Figures 7 to 10, the armrest assembly 100 according to one embodiment of the present invention may further include lifting locking portions 154, 155, and 158 that lock or unlock the lifting portion 150 and the fixing bracket portion 141 using a lifting button portion 158 that rotates inside the lifting body 144.

[0066] 7 and 8, the lifting locking parts 154, 155, 158 may include: a lifting button part 158 ​​whose upper end is hinged to the inside of a lifting body 144 forming the upper exterior of the lifting part 150 so as to have a predetermined rotation point, and whose lower end is partially exposed to the outside of the lifting part 150 when rotated; a rotation lock part 154 formed inside a lifting box 151 that forms the lower exterior of the lifting part 150 and is inserted into the internal space of the fixing bracket part 141, and which has a lock pin 154a formed therein that is engaged with one of a plurality of engagement holes 152a of a locking case 152 that protrudes outward from the lifting box 151 when rotated and is provided to cover one side of the lifting box 151; and a lifting connecting member 155 that connects the lifting button part 158 ​​and the rotation lock part 154.

[0067] The lifting button unit 158 ​​may be provided in the shape of a block exposed on the outside of the lifting body 144 so that the user can push it with a finger or the like, and may be connected to an upper end of the lifting connecting member 155 .

[0068] Although not shown in the drawings, the lifting button part 158 ​​may have an elastic member interposed therein, which can elastically return to its original position when the external force caused by the user's pushing action is removed.

[0069] Here, the lifting button portion 158 may have an inner end exposed so as to be connected to the internal space of the lifting box 151, and inside the lifting box 151, the upper end of the lifting connecting member 155 may be hingedly connected to the lifting button portion 158, and the lower end of the lifting connecting member 155 may be hingedly connected to the rotation lock portion 154.

[0070] The rotation lock part 154 is a member that is rotatable around a predetermined hinge point (drawing symbol not shown) in the internal space of the lifting box 151, and a lock pin 154a is formed to extend radially from the hinge point, and the lower end of the lifting connecting member 155 may be connected to the rotation lock part 154 so as to transmit a rotational force to the rotation lock part 154 without interfering with the lock pin 154a.

[0071] Here, the lock pin 154a of the rotation lock part 154 is exposed to the outside through a pinhole (drawing symbol not shown) formed at the lower end of the lifting box 151, and may be engaged with any one of a number of engagement holes 152a formed at intervals in the vertical direction in a locking case 152 provided to cover one side of the lifting box 151.

[0072] More specifically, the lifting button unit 158 ​​is provided at the lower front end of the lifting body 144 so that the user can easily push it using the index finger or middle finger, and the rotation lock unit 154 may also be provided so that the lock pin 154a is exposed to the outside through a pinhole formed at the lower front end of the lifting box 151 or is hidden inside.

[0073] Here, when the user pushes the lifting button portion 158 into the inside of the lifting body 144, the lifting connecting member 155 is pulled upward and the rotation lock portion 154 is rotated in the same direction, and at the same time, the lock pin 154a of the rotation lock portion 154 is disengaged from one of the locking holes 152a, allowing the user to apply external force in the vertical direction to the lifting portion 150 and adjust the height of the tilting arm pad portion 140.

[0074] Although not shown in the drawings, a predetermined elastic member may be interposed in the rotation lock unit 154 so that the rotation lock unit 154 can elastically return to its original position depending on whether an external force from the user is applied via the lifting connecting member 155. Here, the elastic member may be provided to provide an elastic force in a direction in which the lock pin 154a of the rotation lock unit 154 is inserted into and locked in one of the locking holes 152a when no external force from the user is applied.

[0075] The forward and backward sliding operation process of the tilting arm pad portion 140 of the armrest assembly 100 according to one embodiment of the present invention configured as described above will be briefly described below with reference to the accompanying drawings (particularly, FIG. 9).

[0076] 9(a), when a user applies an external force by pushing the rear end of the tilting arm pad unit 140 with their elbow or pulling it backward with their elbow resting on it, the front end of the tilting arm pad unit 140 is lifted based on the rotation point of the rotation coupling unit 220, and in this case, the upper end of the rotation link unit 230 rotates based on the hinge fixing point 230F at the lower end, supporting the tilt movement of the tilting arm pad unit 140. At this time, the safety cover unit 210 moves in the tilt movement direction in conjunction with the tilting arm pad unit 140 by the guide protrusion 240, which is inserted into the sliding guide slot 148 and is designed to be locked in the tilt movement direction, thereby closing the gap between the lifting unit 150 and the tilting arm pad unit 140, thereby preventing the user's fingers from getting caught in the gap.

[0077] At the same time, as shown in FIG. 9(b), when the user applies an external force by pushing the rear end of the tilting arm pad unit 140 with their elbow or by pulling it backward with their elbow resting on it, the front end of the tilting arm pad unit 140 is guided in its forward and backward sliding movement by the guide protrusion 240 of the safety cover unit 210 inserted into the sliding guide slot 148, and the rear end of the tilting arm pad unit 140 is guided in its forward and backward sliding movement by the support wheel of the pivot coupling unit 220 inserted into the rear end slot 146.

[0078] In this case, the rear end of the tilting arm pad portion 140 and the rear end of the lifting body 144 provide a sufficient safety space S to protect the user's arms, etc., regardless of whether the backrest portion 400 is tilted or not, which has the advantage of preventing injury to the user.

[0079] Meanwhile, the height adjustment process of the tilting arm pad portion 140 of the armrest assembly 100 according to one embodiment of the present invention configured as described above will be briefly described below with reference to the accompanying drawings (particularly, FIG. 10).

[0080] First, in FIG. 10(a), the tilting arm pad 140 is adjusted to its lowest height. When the user pushes and rotates the lifting button 158 with the index finger or middle finger to reset the height of the tilting arm pad 140 on which the user will rest their arm (or elbow), the lifting button 158 rotates around the upper rotation point and is inserted into the lifting body 144. At this time, when the lifting connecting member 155 moves upward along the connecting portion at the inner end of the lifting button 158, the rotation lock 154 rotates in conjunction with the rotation, and the lock pin 154a disengages from one of the multiple locking holes 152a of the locking case 152.

[0081] Here, the user moves the tilting arm pad unit 140 in the vertical direction by applying an external force while pressing the lifting button unit 158, and then releases the lifting button unit 158 ​​at the desired height (for example, the maximum height as shown in FIG. 10(b)). The rotation lock unit 154 then rotates to return to its original position by an elastic member (not shown), and the lock pin 154a is inserted and fixed into the locking hole 152a that matches the pin hole among the multiple locking holes 152a, thereby locking the unit.

[0082] As described above, the armrest assembly 100 according to one embodiment of the present invention only requires interconnection of the lifting button part 158 ​​and the rotation lock part 154 using the wire-shaped lifting connecting member 155, which provides the advantage that the external design of the lifting button part 158 ​​and the internal design of the lifting connecting member 155 within a narrow range are very easy.

[0083] A height-adjustable armrest assembly and a chair including the same according to one embodiment of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment, and it is to be understood that various modifications and equivalents may be made by those skilled in the art. Therefore, the true scope of the present invention should be determined by the following claims. [Industrial Applicability]

[0084] To provide an armrest assembly and a chair including the same, which can prevent injury to a user by adjusting the tilt angle as the tilting arm pad part of the armrest assembly slides forward and backward in response to the tilting angle of the back plate part, and by designing a structure in which a safety cover part is linked only to the tilt movement when the tilting arm pad part tilts and slides. [Explanation of symbols]

[0085] 1 chair 100 Armrest assembly 130 Sheet Joint Block 140 Tilting arm pad 141 Fixed bracket part 144 Lifting Body 145a Bonding Pad 145b Support pad 145c inner pad 146 Rear end slot 148 Sliding guide slot 150 Lifting section 151 Lifting Box 152 Lock King Case 153 Guide Panel 154 Rotation lock part 154a Lock pin 155 Lifting connecting member 158 Lifting button part 210 Safety cover part 220 Rotating joint 221 Elastic Members 230 Rotating link

Claims

1. a fixed bracket portion having an internal space; a lifting unit provided on an upper portion of the fixed bracket unit so as to be movable in an up-down direction, The lifting part is formed such that a part of a rotation lock part that is engaged with or disengaged from the fixed bracket part rotates forward within an internal space of the fixed bracket part, The lifting portion is a lifting box provided in the internal space of the fixed bracket portion so as to be movable in the up and down direction; a lifting body integrally formed on an upper portion of the lifting box; a lifting button unit provided on the lifting body and configured to be pushed and rotated by an external force provided by a user; The rotation locking portion is formed so that a lock pin within a rotation radius protrudes toward the front end of the lifting body in conjunction with the lifting button portion, the lifting button is interlockably connected to the rotation locking portion via a lifting connecting member that connects the rotation locking portion; The fixed bracket portion is fixed to both left and right ends of the seat plate portion, and an internal space of the fixed bracket portion is formed to open upward, The height-adjustable armrest assembly includes an upper end of the lifting connecting member hingedly connected to the lifting button portion, and a lower end of the lifting connecting member hingedly connected to the rotation lock portion.

2. The internal space of the fixed bracket portion is a locking case provided to cover one side of the lifting box and having a plurality of locking holes formed at intervals in the vertical direction, into which the lock pin of the rotation lock unit is inserted and locked; 2. The height-adjustable armrest assembly according to claim 1, further comprising a guide panel provided to cover the other side of the lifting box and having a pair of lifting guide slots formed therein for guiding the lifting box's vertical movement within the internal space of the fixed bracket portion.

3. The plurality of locking holes formed in the locking case are formed at a portion of the fixing bracket that contacts an inner surface of a front end portion thereof, 3. The height-adjustable armrest assembly according to claim 2, wherein the rotation locking portion has a rotation point set in the left-right direction as a center, and the lock pin rotates in the front-rear direction around the rotation point.

4. 3. The height-adjustable armrest assembly according to claim 2, wherein the guide panel and the locking case are connected to each other, and a hook engaging end formed to protrude outward from the outer surface of the lower end of the guide panel is hook-fastened to a hook fastening groove provided inside the fixing bracket portion.

5. The lifting connecting member is 2. The height-adjustable armrest assembly according to claim 1, wherein an upper end of the lifting button is connected to an inner end of the lifting body that is positioned inside the lifting body, and a lower end of the lifting button is connected to a portion of the rotation lock that is spaced a predetermined distance from a rotation point of the rotation lock.

6. 3. The height-adjustable armrest assembly according to claim 2, wherein the rotation lock portion includes an elastic member that elastically restores the rotation lock portion to its original position depending on whether an external force from the user is applied via the lifting connecting member.

7. The elastic member is 7. The height-adjustable armrest assembly according to claim 6, wherein when the user releases the lifting button, the lifting button is inserted into one of a plurality of locking holes formed at a front end of the locking case at intervals in the vertical direction, thereby providing an elastic force in a locking direction.

8. a seat plate portion on which a user sits; a pair of armrest assemblies provided at both left and right ends of the seat plate portion, on which a user can rest their arms; a back panel provided at the rear end of the seat panel, the upper end of which can be tilted in the front-rear direction around the lower end, The pair of armrest assemblies are a fixed bracket portion fixed to both left and right ends of the seat plate portion and having an internal space that is open upward; a lifting unit provided on an upper portion of the fixed bracket unit so as to be movable in an up-down direction, The lifting portion is a lifting box provided in an internal space of the fixed bracket portion so as to be movable in an up-down direction; a lifting body integrally formed on an upper portion of the lifting box; a lifting button part, a part of which is exposed to the outside of the lifting body, and which is pushed and rotated by an external force provided by a user; a rotation lock portion that is engaged with or disengaged from the fixed bracket portion in conjunction with the lifting button portion; a lifting connecting member that connects the lifting button portion and the rotation lock portion, The rotation locking portion has a lock pin that is engaged with or disengaged from the fixed bracket portion and that protrudes from a front end portion of the lifting body. The upper end of the lifting connecting member is hingedly connected to the lifting button portion, and the lower end of the lifting connecting member is hingedly connected to the rotation lock portion.

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