Armrest assembly and chair comprising same

Abstract

The present invention relates to an armrest assembly and a chair comprising the same, the armrest assembly comprising: an arm support main body having an inner space with an open upper end portion, the arm support main body being coupled to a seat portion; an inner body which is inserted and disposed in the inner space of the boom body and which can be moved in the vertical direction by the operation of a user; the arm supporting pad is connected with the upper part of the inner main body and is used for placing and supporting the arm of a user, and the front end part of the arm supporting pad can rotate in the left-right horizontal direction through external force provided by the user; and the friction ring provides friction force between the inner main body and the arm supporting pad.

Description

Technical Field

[0001] The present invention relates to an armrest assembly and a chair including the same. More specifically, the present invention relates to an armrest assembly and a chair including the same, in which an arm support pad is rotated relative to an inner body, and the rotational force (friction force) is adjusted according to different users to improve ease of use and prevent a hinge screw serving as the rotation center from loosening arbitrarily. Background Art

[0002] To improve user convenience, recently launched home and office chairs can not only adjust the height of the seat where the user sits, but also slide the seat forward and backward, so that the sitting position can be adjusted to match the user's body shape. In addition, the backrest that supports the user's back is also based on the lower end, and the upper end can be tilted forward and backward at a specified angle, allowing users to enjoy a more comfortable sitting life.

[0003] Furthermore, the armrest assemblies located at both ends of the seat for placing the user's arms can also be adjusted in height. Moreover, a portion of them can slide forward and backward, or the front or rear end can rotate left and right around any hinge axis, thereby maximizing the user's ease of use.

[0004] In order to rotate the armrest assembly of the prior art to the left and right directions, the structure relatively located at the lower part of the armrest assembly is usually used as the basis, and the structure relatively located at the upper part is rotated, and the two are assembled in a rotatable manner using hinge screws, and include an additional structure that gives the user an operating feel (operating force or rotational force) when the two rotate relative to each other.

[0005] However, as for the operating feel imparting part of the armrest assembly in the prior art, it only imparts a specified operating feel to the user, rather than setting the size of the operating feel (operating force) to match different users. Therefore, there is the inconvenience of having to replace the structure of the operating feel imparting part in order to impart a matching operating feel to the user.

[0006] At the same time, it is also pointed out that the operational feel imparting portion of the armrest assembly of the prior art has a problem of generating a large noise when forming the operational feel due to predetermined interference on the rotation path between the rotating structural element and the fixed structural element.

[0007] Furthermore, in the armrest assembly of the prior art, when the hinge screws connected in a manner of relative rotation are tightened by means of a full assembly force in the structure of the armrest assembly, the hinge screws may become loose arbitrarily due to repeated rotation operations by the user, thereby also causing the problem of flow of elements constructed in a rotational manner. Summary of the Invention

[0008] Technical issues

[0009] The present invention is proposed to solve the technical problems mentioned above, and its purpose is to provide an armrest assembly and a chair including the same, which can rotate (rotate) the arm support pad relative to the inner body, adjust the rotational force (friction force) according to different users, so as to improve the convenience of use and prevent the hinge screw serving as the rotation center from loosening arbitrarily.

[0010] Problems of the present invention are not limited to the problems mentioned above, and those skilled in the art in the art to which the present invention pertains can clearly understand other problems not mentioned through the following description.

[0011] Solution to the problem

[0012] The armrest assembly of one embodiment of the present invention includes: an arm frame main body, which is formed with an internal space with an open upper end and is involved in the combination with the seat part on which the user sits; an inner body, which is inserted into and arranged in the internal space of the arm frame main body and can be moved in the upward and downward directions by the operation of the user; an arm support pad, which is connected to the upper part of the inner body and is used to place and support the user's arm, and the front end can be rotated in the left and right horizontal directions by the external force provided by the user; and a friction ring, which is arranged between the inner body and the arm support pad, and provides friction between the inner body and the arm support pad when the arm support pad rotates relative to the inner body, and the friction force based on the friction ring is determined by the assembly force of the hinge screw used to connect the inner body and the arm support pad.

[0013] In which, the inner body may include a height adjustment shell and a connecting part, the height adjustment shell is inserted into the internal space of the arm body and adjusts the height, the connecting part is arranged at the upper end of the height adjustment shell, and is used to intervene in the relative rotation connection of the arm support pad, and the friction ring can be placed in a circular setting groove formed on the upper surface of the connecting part.

[0014] Also, the upper end portion of the friction ring may be pressed by the lower end portion of the annular pressing boss protruding toward the lower portion of the arm support pad, and determine the friction force.

[0015] Furthermore, a plurality of latching protrusions may be formed on the friction ring, the plurality of latching protrusions protruding downward from the lower surface of the friction ring, and the plurality of latching protrusions are respectively inserted into and fixed in a plurality of latching grooves formed in the circular setting groove.

[0016] Furthermore, the friction ring can be an elastomer made of rubber.

[0017] Furthermore, a screw fastening boss with a screw fastening hole can be provided on the inner body, a screw through boss can be provided on the arm support pad, a screw through hole can be formed in the screw through boss at a position corresponding to the screw fastening hole, and in the friction ring, an annular pressing boss protruding toward the lower part of the arm support pad can be moved downward and pressed by the assembly force of the hinge screw that is fastened with the screw through hole passing through the screw through boss and the screw fastening hole of the screw fastening boss.

[0018] Furthermore, a flat washer can be inserted into the hinge screw to facilitate the transfer of assembly force from the user toward the annular pressing boss.

[0019] Furthermore, a plurality of grooves can be repeatedly formed in the circumferential direction on the outer peripheral surface of the annular pressing boss, and a running sense imparting portion can be further provided on the upper surface of the connecting portion of the inner main body. The running sense imparting portion is elastically supported toward the plurality of grooves and imparts a running sense when the arm support pad rotates.

[0020] Furthermore, the running sense imparting portion may include: a component shell having a setting space on the upper surface of the connection portion of the inner main body, which is open toward the multiple grooves; an elastic rubber, which is arranged on the inner side of the setting space in the component shell; and an action pin, the inner end of the action pin is supported by the elastic rubber, and a portion of the outer surface of the action pin is supported by the multiple grooves.

[0021] An embodiment of the chair of the present invention includes: a seat portion for a user to sit on; and an armrest assembly disposed at the left and right ends of the seat portion for placing and supporting the user's arms. The armrest assembly includes: an armrest body having an internal space with an upper opening and engaging with the seat portion; an inner body inserted into and disposed within the internal space of the armrest body, movable vertically by the user's operation; an arm support pad connected to the upper part of the inner body for placing and supporting the user's arms, the front end of which can be rotated horizontally to the left and right by an external force provided by the user; and a friction ring disposed between the inner body and the arm support pad, providing friction between the inner body and the arm support pad when the arm support pad rotates relative to the inner body. The friction force based on the friction ring is determined by the assembly force of the hinge screws connecting the inner body and the arm support pad.

[0022] Effects of the Invention

[0023] The armrest assembly and the chair including the same according to one embodiment of the present invention have the following advantages: by adjusting the tightening force of the hinge screw, the rotational force (operating force) of the arm support pad can be set to match different users, and the equal distribution design of the friction force based on the friction ring can prevent the hinge screw from loosening arbitrarily, thereby greatly improving the convenience of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a perspective view illustrating an armrest assembly and a chair including the armrest according to an embodiment of the present invention.

[0025] Figure 2 1 is a perspective view showing an armrest assembly according to an embodiment of the present invention.

[0026] Figure 3 To express Figure 2 A three-dimensional diagram showing the various rotational states of the armrest pad in the structure.

[0027] Figure 4a and Figure 4b for Figure 2 Exploded downward and upward perspective views,

[0028] Figure 5 This is a partial side sectional view and a partial enlarged view of a handrail assembly according to an embodiment of the present invention.

[0029] Figure 6 This is an exploded perspective view showing another embodiment of the friction ring in the structure of the armrest assembly according to one embodiment of the present invention.

[0030] Figure 7a and Figure 7bIt is a partially cutaway perspective view and a partially enlarged view of an armrest assembly according to an embodiment of the present invention.

[0031] Description of Reference Signs

[0032] 100: Chair 110: Seat

[0033] 120: Backrest 130: Head support

[0034] 140: Leg 150: Operation part

[0035] 200: Armrest assembly 210: Armrest body

[0036] 220: Inner body 221: Height adjustment shell

[0037] 222: Connecting part 223: Upper part of the connecting part

[0038] 224: Setting groove 224a: Locking groove

[0039] 225: Friction ring 225a: Locking protrusion

[0040] 226: Running feeling imparting unit 227: Component housing

[0041] 228: Elastic rubber 229: Action pin

[0042] 230: Arm support pad 231: Connection pad

[0043] 232: Support pad 233h: Screw through hole

[0044] 234: Screw through boss 235: Screw setting hole

[0045] 236: Annular press-fit boss 237: Hole cover

[0046] 240: Hinge screw 241: Flat washer

[0047] S: Safe Space DETAILED DESCRIPTION

[0048] Hereinafter, an 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.

[0049] It should be noted that when assigning reference numerals to the structural elements of the various drawings, the same reference numerals should be assigned to the same structural elements as much as possible, even if they are shown in different drawings. Furthermore, when describing the present invention, if it is determined that the detailed description of the relevant well-known structure or function may hinder the understanding of the embodiments of the present invention, the detailed description will be omitted.

[0050] Furthermore, in the process of describing the structural elements of the embodiments of the present invention, terms such as first, second, A, B, (a), (b) and the like may be used. Such terms are only used to distinguish the structural elements thereof from other structural elements, and the nature, order or sequence of the relevant structural elements, etc. will not be restricted by these terms. Furthermore, all terms used herein, including technical terms or scientific terms, have the same meaning as the terms commonly understood by those of ordinary skill in the art to which the present invention belongs, as long as they are not defined in a different manner. Terms commonly used that are the same as those defined in the dictionary should be interpreted as having a meaning consistent with the meaning of the relevant technical context, and will not be interpreted as having an overly ideal or formal meaning as long as they are not clearly defined in this application.

[0051] Figure 1 The figure is a perspective view showing an armrest assembly and a chair including the same according to an embodiment of the present invention.

[0052] Reference Figure 1 ,like Figure 1 As shown, a chair 100 according to an embodiment of the present invention includes: a seat portion 110, which is horizontally arranged at a specified height from the ground for a user to sit; a backrest portion 120, which is approximately vertically arranged on the rear end side of the seat portion 110, and the upper end of which can be tilted in the forward and backward directions based on any inclination point of the lower end, for supporting the back of the user; a head support portion 130, which is arranged at the center of the upper end of the backrest portion 120, for supporting the back of the user's head; and a leg portion 140, which supports the seat portion 110 at a specified height from the ground.

[0053] Meanwhile, the chair 100 of one embodiment of the present invention may also include an operation part 150, which is disposed on the lower surface of the seat part 110 and connected to each connecting part of the seat part 110 and the backrest 120, so that the seat part 110 can slide in the front-back direction and the backrest 120 can tilt and move in the front-back direction.

[0054] Furthermore, in one embodiment of the present invention, the chair 100 may also include armrest assemblies 200 at the left and right ends of the seat portion 110, the armrest assemblies 200 being used to support the arms of the user sitting on the seat portion 110. A detailed description of the armrest assemblies 200 will follow.

[0055] The seat portion 110 can slide in the front-rear direction relative to a seat frame (not shown) so that the seating position can be adjusted according to the convenience of the user.

[0056] More specifically, the seat portion 110 can extend forward and backward. The seat portion 110 is a part for a user to sit on. The seat portion 110 can support the user's buttocks and the various thigh parts of the user's legs.

[0057] In the upper surface of the seat portion 110, the rear portion that supports the user's buttocks can be slightly sunken toward the lower side, and the front portion that supports the user's thighs on both sides can be inclined so that the closer to the front, the closer to the lower side.

[0058] The backrest 120 can extend vertically and tilt at a predetermined angle so that its lower end is positioned further forward than its upper end. The lower end of the backrest 120 can be hinged to the seat frame (not shown). Thus, the backrest 120 can be adjusted so that its upper end can tilt forward and backward about the hinge at its lower end.

[0059] The head support 130 can extend vertically and be coupled to the center of the upper end of the backrest 120. The head support 130 can be formed integrally with the backrest 120, and the lower end can be coupled to the backrest 120 with the upper end tilted in the front-to-back direction about a horizontal axis formed in the front surface of the upper end of the backrest 120 in a long horizontal direction.

[0060] On the other hand, the leg portion 140 may be disposed below the seat portion 110 and may support the operating portion 150. The leg portion 140 may include: a plurality of branch frames 141 disposed radially; and a moving wheel 143 rotatably coupled to the lower front end of each branch frame 141.

[0061] Regarding the branch frame 141, it is possible to have five branch frames 141 branching at the same angle at the center, but within the range supporting the user's seating, it is sufficient to form three or more branch frames 141. Although not shown, a cylinder device can be provided at the center of the branch frame 141 and recessed into the lower part of the seat 110, and the user can adjust the height of the seat 110 by operating the operating part 150.

[0062] Figure 2 1 is a perspective view showing an armrest assembly according to an embodiment of the present invention. Figure 3 To express Figure 2 A three-dimensional diagram showing the various rotational states of the armrest pad in the structure. Figure 4a and Figure 4b for Figure 2 Exploded downward and upward perspective views, Figure 5 This is a partial side sectional view and a partial enlarged view of a handrail assembly according to an embodiment of the present invention. Figure 6 This is an exploded perspective view showing another embodiment of the friction ring in the structure of the armrest assembly according to one embodiment of the present invention. Figure 7a and Figure 7bThis is a partially sectional perspective view and a partially enlarged view of a handrail assembly according to an embodiment of the present invention.

[0063] like Figure 1 and Figure 2 As shown, the armrest assembly 200 includes: an arm support body 210, which is combined with one side and the other side of the lower part of the left and right ends of the seat part 110, and extends upward to a specified height; an inner body 220, which is inserted into the interior of the arm support body 210 and can be moved in the upward and downward directions by the operation of the user; and an arm support pad 230, which is connected to the upper part of the inner body 220 and is used to place and support the user's arm (Arm).

[0064] With respect to the armrest assembly 200 having such a structure, the insertion end 213 formed at the lower end portion of the armrest body 210 is roughly parallel to the lower surface of the seat portion 110, and after being inserted into the lower coupling ends (not shown) of the left and right end portions of the seat portion 110, a firm connection is achieved with the aid of assembly screws (not shown), which are assembled through a fastening component through hole 215 formed to penetrate the insertion end 213 in the upward and downward directions.

[0065] Regarding the arm body 210 , the portion extending upward except for the portion parallel to the lower surface of the seat portion 110 may form an inner space, and the inner space may realize the internal arrangement of the inner body 220 .

[0066] A height adjustment button 250 exposed to the outside is provided at the upper end of the inner body 220 inserted into the internal space of the arm body 210, and a rotating lock portion (not shown) connected to the height adjustment button 250 is provided inside the inner body 220, so that the user can adjust the arm support pad 230 to the desired height.

[0067] In more detail, the inner body 220 may include a height adjustment shell 221 and a connecting part 222. The height adjustment shell 221 is inserted into the internal space of the arm body 210 and adjusts the height. The connecting part 222 is arranged at the upper end of the height adjustment shell 221 and is used to intervene in the relative rotation connection of the arm support pad 230.

[0068] That is, the arm support pad 230 can rotate left and right with the upper and lower rotation axis of the connecting part 222 located at the upper end of the inner body 220 as the center, while the height is fixed.

[0069] On the other hand, Figure 1 and Figure 2As shown, the arm support pad 230 may include: a connecting pad 231, which can rotate relative to the connecting portion 222 of the inner body 220 and extends obliquely forward; and a support pad 232, which is integrally connected to the upper side of the front end of the connecting pad 231 and extends horizontally or obliquely upward at a predetermined angle to substantially support the user's arm.

[0070] A safety space S can be formed between the rear ends of the connecting pad 231 and the support pad 232. When the backrest 120 is adjusted to tilt forward or backward, the safety space S prevents the user's arm from being trapped and injured.

[0071] In the structure of the armrest assembly 200 of an embodiment of the present invention configured as described above, such as Figure 3 As shown, the arm support pad 230 can be fixed with a hinge screw (see Figure 4a and Figure 4b The hinge screw rotates left and right around the center (reference numeral "240"), and is used to engage with the connection 222 of the inner body 220.

[0072] That is, such as Figure 3 As shown in part (a), the arm support pad 230 can be fixed in the middle as is, using the hinge screw 240 as a reference, according to the user's preference, and the user's arm can be placed in this state. Furthermore, as... Figure 3 (b) part or Figure 3 As shown in section (c), the front end of the arm support pad 230 can be rotated to the left or right by a specified angle, with the hinge screw 240 as the reference, according to the user's preference, and the user's arm can be placed in this state.

[0073] On the other hand, Figure 4a and Figure 4b As shown, the arm support pad 230 can be connected to the upper surface of the connection portion 222 of the inner body 220 in a rotatable manner.

[0074] For this purpose, a screw mounting hole 235 can also be formed in the safety space S of the arm support pad 230. The screw mounting hole 235 is located at the part where the connecting pad 231 is formed, and is used to mount the hinge screw 240 described later.

[0075] After the hinge screw 240 described later is installed, the screw installation hole 235 can be covered by the hole cover 237. The shape of the outer side surface of the hole cover 237 can match the outer surface of the safety space S side forming the connection pad 231.

[0076] The arm support pad 230 can be connected to the inner body 220 in a rotatable manner relative to the upper surface of the connection portion 222 via the hinge screw 240 .

[0077] To this end, a screw fastening boss with a screw fastening hole 223h can be provided on the upper surface 223 of the connecting portion 222 of the inner main body 220 (not shown in the drawings), and a screw through boss 234 is formed on the lower surface of the connecting pad 231 in the arm support pad 230, and a screw through hole 233h is formed in the screw through boss 234 at a position corresponding to the screw fastening hole 223h.

[0078] The arm support pad 230 can be connected to the connection part 222 of the inner body 220 in a rotatable manner by the hinge screw 240 passing through the screw setting hole 235 on the safety space S side with the hole cover 237 removed and then fastened to the screw fastening hole 223h.

[0079] Among them, such as Figure 5 As shown, a flat washer 241 can be inserted into the hinge screw 240. The flat washer 241 can be supported by the head of the hinge screw 240 passing through it, and the edge end portion supports the peripheral portion of the screw through hole 233h in the bottom surface of the screw setting hole 235, thereby transmitting the user's assembly force transmitted to the hinge screw 240 to the arm support pad 230 and supporting the arm support pad 230 when it rotates.

[0080] Furthermore, the flat washer 241 can be used to intervene and transmit the assembly force transmitted by the user to the annular pressing boss 236, and the annular pressing boss 236 is formed as a whole with the lower end of the connecting pad 231 to press the friction ring 225 described later.

[0081] On the other hand, the armrest assembly 200 of an embodiment of the present invention may further include a friction ring 225, such as Figures 5 to 7b As shown, the friction ring 225 is disposed between the inner body 220 and the arm support pad 230 to provide friction between the inner body 220 and the arm support pad 230 when the arm support pad 230 rotates relative to the inner body 220 .

[0082] The friction ring 225 may be an elastic body made of rubber material. Therefore, when the assembly force of the hinge screw 240 is transmitted by the annular pressing boss 236 described later, the friction ring 225 may be elastically deformed.

[0083] The friction force based on the friction ring 225 may be determined by the assembly force of the hinge screw 240 for connecting the inner body 220 and the arm support pad 230 .

[0084] In more detail, the friction ring 225 can be arranged between the inner body 220 and the arm support pad 230, and is elastically compressed by the assembly force transmitted through the hinge screw 240, and forms friction force on each contact surface between the two (the inner body 220 and the arm support pad 230). Thus, when the assembly force above the specified level is not transmitted, it can prevent the arm support pad 230 from rotating arbitrarily.

[0085] To this end, a circular installation groove 224 may be formed on the upper surface of the connecting portion 222, and the friction ring 225 may be placed in the circular installation groove 224. The circular installation groove 224 may be formed in the form of a discontinuous arc-shaped rib protruding upward.

[0086] At the same time, an annular pressing boss 236 may be formed on the lower surface of the connecting pad 231 in the arm support pad 230. The diameter of the annular pressing boss 236 is larger than the screw through boss 234. When the hinge screw 240 is fastened to the screw fastening hole 223h, the annular pressing boss 236 serves to uniformly press the upper surface of the friction ring 225.

[0087] In this way, the uniform pressing force exerted by the annular pressing boss 236 on the friction ring 225 serves as the operating force adjusted by the user through the hinge screw 240. At least the friction ring 225 should be formed of an elastomer that can be elastically deformed below a specified hardness in order to impart a friction force corresponding to the above-mentioned operating force to the annular pressing boss 236.

[0088] At this time, if Figure 5 As shown, in the absence of an additional locking structure, if the friction ring 225 is formed into a structure that can rotate in conjunction with the annular pressing boss 236, then when the hardness of the friction ring 225 is low, tearing caused by operation accumulation may occur intermittently, and there is concern that, depending on whether there is a linked rotation with the annular pressing boss 236, there may be a problem of setting a different operating force for each product regardless of the adjustment degree of the hinge screw 240.

[0089] Therefore, as Figure 6 As shown, the friction ring 225 may be formed with a plurality of latching protrusions 225a, which protrude downward from the lower surface of the friction ring 225. The plurality of latching protrusions 225a of the friction ring 225 formed in this manner are respectively inserted into and fixed to a plurality of latching grooves 224a formed in the circular setting groove 224. As a result, the friction ring 225 is not rotated in conjunction with the annular press-fit boss 236, but rather generates a uniform friction force, thereby resolving the problem of varying operating forces for each product.

[0090] The friction ring 225 described above can be applied as is to the relative rotation structure between the connecting pad 231 and the supporting pad 232, and it is natural that the embodiment that is deformed based on the structure of the multiple locking protrusions 225a and the multiple locking grooves 224a can also be applied to the friction ring 225 in this case.

[0091] On the other hand, Figure 4b As shown, a plurality of grooves 238 may be repeatedly formed on the outer peripheral surface of the annular press-fit boss 236 in the circumferential direction, and as shown in FIG. Figure 4a As shown, a motion sense imparting portion 226 may be further provided on the upper surface of the connecting portion 222 of the inner body 220 . The motion sense imparting portion 226 is elastically supported toward the plurality of grooves 238 and imparts a motion sense when the arm support pad 230 rotates.

[0092] Among them, such as Figure 7b As shown, the operation sense imparting part 226 may include: a component shell 227, which has a setting space on the upper surface of the connection part 222 of the inner main body 220 and is open toward a plurality of grooves 238 (not shown in the drawings); an elastic rubber 228, which is arranged on the inner side of the setting space in the component shell 227; and an action pin 229, the inner end of the action pin 229 is supported by the elastic rubber 228, and a part of the outer surface of the action pin 229 is supported by the plurality of grooves 238.

[0093] If the user grasps the arm support pad 230 with his hand and rotates the arm support pad 230 in the desired direction, the running feeling generated in the process of the action pin 229 elastically supported by the elastic rubber 228 crossing over multiple grooves 238 in sequence is transmitted in reverse to the user, so that the user can receive the specified running feeling (operation feeling).

[0094] The effects of the armrest assembly 200 according to an embodiment of the present invention constructed as described above will be briefly described below with reference to the accompanying drawings.

[0095] First, if Figure 3 As shown, if the user grasps the arm support pad 230 with his hands and rotates it in a desired direction, the front end of the arm support pad 230 rotates to one side or the other side with the hinge screw 240 as the hinge center.

[0096] At this time, the friction ring 225 provided between the arm support pad 230 and the connection portion 222 of the inner body 220 may generate different friction forces according to the assembly force pre-adjusted by the hinge screw 240 and rotate.

[0097] In order to adjust the rotational force (friction force) of the arm support pad 230 to suit different users, after removing the hole cover 237, the assembly force of the hinge screw 240 can be adjusted using a simple tool to achieve this.

[0098] At this time, if Figure 7a and Figure 7b As shown, the friction ring 225 can not only be designed to obtain uniform pressing support through the annular pressing boss 236, but also prevent the hinge screw 240 from directly contacting the arm support pad 230 via the flat washer 241, thereby preventing the hinge screw 240 from loosening at will.

[0099] As such, the armrest assembly 200 and the chair 100 including the same according to an embodiment of the present invention provide the following advantages: when the arm support pad 230 performs a rotation operation, a uniform friction force is formed between the arm support pad 230 and the inner body 220 by means of the friction ring 225, which not only minimizes the operating noise but also allows the user to conveniently adjust the required rotation force (friction force) according to different users.

[0100] The armrest assembly 200 and chair 100 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 is readily adaptable to various modifications and equivalent implementations by those skilled in the art. Therefore, the true scope of protection of the present invention is defined by the following claims.

[0101] Industrial applicability

[0102] The present invention provides an armrest assembly and a chair including the same, which can set the rotational force (operating force) of the arm support pad to match different users by adjusting the tightening force of the hinge screw, and prevent the hinge screw from loosening arbitrarily through an equal distribution design of the friction force based on the friction ring.

Claims

1. An armrest assembly, characterized in that: include: The arm frame body is formed with an inner space with an upper end opening, and is involved in the combination with the seat portion where the user sits; The inner body is inserted into and arranged in the inner space of the arm body and can be moved in the upward and downward directions by the operation of the user; An arm support pad connected to the upper portion of the inner body, used to place and support the user's arm, and the front end portion can be rotated horizontally to the left and right by the external force provided by the user; and a friction ring, disposed between the inner body and the arm support pad, to provide friction between the inner body and the arm support pad when the arm support pad rotates relative to the inner body, The friction force based on the friction ring is determined by an assembling force of a hinge screw for connecting the inner body and the arm support pad.

2. The armrest assembly according to claim 1, characterized in that: The inner body includes a height adjustment shell and a connecting part. The height adjustment shell is inserted into the inner space of the arm support body and adjusts the height. The connecting part is arranged at the upper end of the height adjustment shell and is used to intervene in the relative rotation connection of the arm support pad. The friction ring is placed in a circular installation groove formed on the upper surface of the connecting portion.

3. The armrest assembly according to claim 2, characterized in that: The upper end portion of the friction ring is pressed by the lower end portion of the annular pressing boss protruding toward the lower portion of the arm support pad, and determines the friction force.

4. The armrest assembly according to claim 2, characterized in that: A plurality of locking protrusions are formed on the friction ring, and the plurality of locking protrusions protrude downward from the lower surface of the friction ring. The plurality of locking protrusions are respectively inserted into and fixed in a plurality of locking grooves, and the plurality of locking grooves are formed in the circular setting groove.

5. The armrest assembly according to any one of claims 1 to 4, characterized in that: The friction ring is an elastic body formed of rubber material.

6. The armrest assembly according to claim 5, characterized in that: The inner body is provided with a screw fastening boss with a screw fastening hole formed therein, the arm support pad is provided with a screw through boss, and a screw through hole is formed in the screw through boss at a position corresponding to the screw fastening hole. In the friction ring, the annular pressing boss protruding toward the lower part of the arm support pad moves downward and is pressed by the assembly force of the hinge screw that is fastened to the screw fastening hole of the screw fastening boss and the screw through hole of the screw through boss.

7. The armrest assembly according to claim 6, characterized in that: A flat washer is clamped in the hinge screw to intervene in the transmission of the assembly force transmitted from the user toward the annular press-fit boss.

8. The armrest assembly according to claim 6, characterized in that: A plurality of grooves are repeatedly formed on the outer peripheral surface of the annular pressing boss in the circumferential direction. A running sense imparting portion is further provided on the upper surface of the connecting portion of the inner body. The running sense imparting portion is elastically supported toward the plurality of grooves and imparts a running sense when the arm support pad rotates.

9. The armrest assembly according to claim 8, characterized in that: The running feeling imparting unit includes: A component housing having an installation space on an upper surface of the connection portion of the inner body and opening toward the plurality of grooves; An elastic rubber is disposed inside the installation space in the component housing; and An action pin, wherein the inner end of the action pin is supported by the elastic rubber, and a portion of the outer side surface of the action pin is supported by being combined with the plurality of grooves.

10. A chair, characterized in that: include: The seat part allows the user to sit down; and The armrest assembly is arranged at the left and right ends of the seat part, and is used to place and support the user's arms. The armrest assembly comprises: The arm frame body is formed with an inner space with an upper end opening and is involved in the combination with the seat portion; The inner body is inserted into and arranged in the inner space of the arm body and can be moved in the upward and downward directions by the operation of the user; An arm support pad connected to the upper portion of the inner body, used to place and support the user's arm, and the front end portion can be rotated horizontally to the left and right by the external force provided by the user; and a friction ring, disposed between the inner body and the arm support pad, to provide friction between the inner body and the arm support pad when the arm support pad rotates relative to the inner body, The friction force based on the friction ring is determined by an assembling force of a hinge screw for connecting the inner body and the arm support pad.

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