JP3675144B2 - Chair armrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest device for a chair, and more particularly to an armrest device for a chair whose armrest portion can be adjusted in the vertical angle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has already been provided an armrest portion whose vertical angle can be adjusted with respect to a support portion rising from a seat portion or a leg portion of a chair. As the angle adjustment mechanism of the armrest part, a tilting member attached to the inside of the armrest part is pivotally attached to the upper end of the support part, and a plurality of engaging recesses are formed in the support part at predetermined intervals in the vertical direction. In some cases, the engaging recess is elastically fitted with an engaging projection provided in the armrest portion, and the angle is adjusted in multiple stages.
[0003]
However, the conventional angle adjustment mechanism of the armrest part is an operation in which an operating lever for engaging and disengaging the engaging protrusion with respect to the engaging recess is attached to the cover member constituting the armrest part, while the engaging protrusion is provided. The member is attached to the tilting member, and the operating lever and the operating member are linked directly or indirectly, or the engaging protrusion is integrally formed at the free end of the operating lever. Or the structure which latched the engaging pin etc. is taken.
[0004]
Therefore, it has been impossible to laterally move or rotate the cover member of the armrest portion relative to the tilting member. In addition, it is considered that all members such as the operation lever related to the vertical angle adjustment mechanism are attached to the tilting member. In that case, an operation hole for exposing the operation portion of the operation lever from the cover member is provided. Since it must be made sufficiently large, the appearance is also inferior, and there is a risk that a finger may be caught between the operation portion and the edge of the operation hole, which is not realistic.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem of the chair in which the armrest portion can be adjusted in the vertical direction and the horizontal movement and / or the horizontal angle can be adjusted with respect to the support portion rising from the seat portion or the leg portion. In the armrest unit vertical angle adjustment mechanism in the armrest device, it is possible to provide an operation lever on the cover member of the armrest portion and set the operation hole for exposing the operation portion to a minimum size. It is the point which provides the armrest apparatus of the chair which can perform an up-and-down angle adjustment in combination with the right-and-left lateral movement and left-right angle adjustment.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a chair armrest device in which an armrest portion can be adjusted in a vertical angle and can be laterally moved and / or adjusted in a horizontal direction with respect to a support portion rising from a seat portion or a leg portion. The tilting member is connected to the upper end of the support portion so as to be vertically tiltable by a horizontal support shaft, and the cover member of the armrest portion is attached to the tilting member so as to be laterally movable and / or rotatable. An operation lever is attached to the front part of the support part so as to be able to tilt up and down, and the operation part is exposed on the lower surface. An operating rod extending forward of a rotating member pivotally attached to the portion abuts the upper surface of the operating lever, and an engaging pin locked to the tip of the operating rod extending downward of the rotating member is engaged. It is possible to engage with the recess, and the rotating part The engagement pin constituted the armrest device of the chair formed by elastically urged in the rotational direction to engage the engaging recess.
[0007]
Specifically, the lateral width of the operating lever is such that the tip of the operating rod of the rotating member always abuts against the upper surface of the operating lever even when the cover member is laterally moved or rotationally displaced with respect to the tilting member. It is set as follows. In addition, long holes are formed in both side plates of the tilting member along a locus along which the engaging pin moves as the rotating member rotates, and both end portions of the engaging pin can slide within the long hole. The engaging recess is formed in a metal rack member, the rack member is fitted to the front upper end portion of the block body, and the block body is placed in the upper end portion of the cylindrical support portion. It is also preferable that the rack member is fixed to the upper end portion of the support portion by fitting.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 shows a chair according to the present invention, FIG. 2 shows a state in which an armrest portion is set horizontally, FIG. 3 shows a state in which the front portion of the armrest portion is inclined upward, and FIGS. 4 to 15 show details of each portion. In the figure, reference numeral 1 denotes a leg portion of the chair, 2 denotes a seat portion, 3 denotes a backrest portion, 4 denotes an armrest device, 5 denotes a support portion, and 6 denotes an armrest portion.
[0009]
The armrest device 4 according to the embodiment of the present invention is capable of adjusting the height of the armrest portion 6 with respect to the support portion 5 standing up from the seat portion 2 or the leg portion 1, adjustable in the vertical angle, laterally movable, and laterally adjustable. Is provided. However, since the armrest device 4 according to the present invention is characterized by the vertical angle adjustment mechanism, the horizontal movement, and the horizontal angle adjustment mechanism, it is not essential whether the armrest portion 6 can be adjusted in height.
[0010]
The support portion 5 includes a support arm 7 and a lift body 8. A hollow cylindrical lift body 8 that is attached to the armrest portion 6 and is opened up and down is mounted on the top of the support arm 7 fixed to the seat portion 2. It has a structure that is movably fitted. A height adjusting mechanism is provided between the support arm 7 and the lifting body 8 to adjust the height of the lifting body 8 with respect to the support arm 7 and to maintain the height.
[0011]
As shown in FIGS. 2 to 5, the vertical angle adjusting mechanism connects the tilting member 9 to the upper end of the support portion 5 so as to be tiltable up and down with a horizontal support shaft 10, and the tilting member 9 is connected to the armrest portion. in the accommodated state within 6, is attached to the armrest 6 traversing and / or rotatable with respect to the tilting member 9, the operation of the operation lever 11 to the front portion of the armrest 6 mounted to be vertically tilted Is formed on the front surface side of the upper end portion of the support portion 5, and a plurality of engagement recesses 13 are formed on the front surface of the upper end portion of the support portion 5. An operating pin 15 extending forward is brought into contact with the upper surface of the operating lever 11, and an engaging pin 17 engaged with a tip of an operating rod 16 extending downward of the rotating member 14 is provided in the engaging recess 13. The engaging member 17 is engaged, and the rotating member 14 is engaged with the engaging pin 17. Is made of elastically urged by an elastic member 18 provided in the rotation direction to be engaged with the recess 13 between the the pivoting member 14 and the tilting member 9.
[0012]
More specifically, the tilting member 9 is formed by bending a metal plate. The side plates 20 and 20 are suspended from both side edges of the upper surface plate 19 and the front and rear ends of the upper surface plate 19 are extended to hold the holding plate. 21 and 21 are formed, and the front portion of the side plate 20 has a shape that extends downward. In addition, shaft holes 22 and 22 for inserting the support shaft 10 are formed in the rear portions of the side plates 20 and 20, and the rotating member 14 is provided at the upper ends of the front portions of the side plates 20 and 20. Through holes 24 and 24 for inserting shaft pins 23 that are rotatably supported are formed, and a locus along which the engaging pins 17 move as the rotating member 14 rotates at the lower end of the front portion. In other words, long holes 25, 25 directed to the shaft hole 22 are formed, and both end portions of the engagement pin 17 are slidably engaged in the long holes 25, 25.
[0013]
The armrest portion 6 is formed by joining an upper cover member 26 and a lower cover member 27 made of a synthetic resin to form a hollow inside, and the tilting member 9 is moved laterally to the upper cover member 26. The lower cover member 27 is formed with an opening 28 for receiving the support portion 5 and an operation hole 29 for exposing the operation portion 12 of the operation lever 11.
[0014]
The operation lever 11 has shaft portions 30 and 30 formed on a plate-like base portion, and the operation portion 12 protrudes from a lower portion on the free end side. The lateral width of the operating lever 11 is such that the tip of the operating rod 15 of the rotating member 14 is always the upper surface of the operating lever 11 even when the cover members 26, 27 are laterally moved or rotationally displaced with respect to the tilting member 9. It is set sufficiently wide so that it abuts. The shaft portion 30 has a shape that is flat in a direction perpendicular to the plate surface of the operation lever 11, and protrudes inwardly from the lower cover member 27 to pivotally support the shaft portion 30. The bearing portion 31 is provided with a gap corresponding to the flat width of the shaft portion 30 on the rear side, a bearing hole 32 that rotatably receives the shaft portion 30 is formed therein, and the operation lever 11 is erected in a state where the operation lever 11 is raised. The part 30 is inserted into the bearing hole 32, and then the operation part 12 is attached so as to be inserted into the operation hole 29. In this attached state, the shaft portion 30 does not come out of the bearing hole 32.
[0015]
The rotating member 14 forms a shaft cylinder 33 through which the shaft pin 23 is inserted at the center, and the operating rod 15 extends forward from the shaft tube 33, and the tip of the operating rod 15 is The operating rod 16 is parallel to the upper surface of the operation lever 11 and extends downward from the shaft tube 33, and the tip of the operating rod 16 has a U-shaped locking portion 34 for receiving the engaging pin 17. It has become.
[0016]
The engaging recesses 13,... Form both side pieces 36 of a metal rack member 35 formed in a substantially U shape in a plan view, and the rack member 35 is fitted to the front upper end portion of the synthetic resin block body 37. The rack member 35 is fixed to the upper end portion of the elevating body 8 by fitting the block body 37 in the upper end portion of the cylindrical elevating body 8, so A plurality of engaging recesses 13 are formed. Here, a downward engaging claw 38 is formed on the upper edge of the front surface of the block body 37, and a horizontal support piece 39 is provided at a distance below the engaging claw 38. A front surface on the upper side of the support piece 39. And the upper edge of the substrate 41 of the rack member 35 is engaged with the engagement claw 38, and the lower edge is in contact with the support piece 39 and is formed on the substrate 41. By fitting the hole 42 into the protrusion 40 and inserting the block body 37 into the upper end of the lifting body 8 in this state, the both side pieces 36, 36 of the rack member 35 are brought into contact with the inner surface of the lifting body 8. The rack member 35 is completely fixed.
[0017]
Further, the block body 37 is formed with a sliding hole 44 vertically penetrating therein for slidably receiving a metal support plate 43 provided at the upper end of the support arm 7. Further, the structure for fixing the block body 37 to the elevating body 8 is such that the claw piece 47 provided at the lower end of the front surface of the block body 37 is provided in the locking hole 46 provided in the vertical plate 45 integrally formed in the elevating body 8. A bearing portion 48 projecting from the upper end of the rear surface of the block body 37 is fitted between a pair of holding pieces 49, 49 provided at the upper rear end of the elevating body 8. The shaft holes 50 and 50 provided in 49 and the shaft hole 51 provided in the bearing portion 48 are used as a common hole, and the support shaft 10 that pivotally supports the armrest portion 6 so as to be pivotable up and down is inserted and connected.
[0018]
In order to adjust the vertical angle of the armrest portion 6, when the operation portion 12 of the operation lever 11 is pushed upward, the operation lever 11 rotates upward and the operation rod 15 of the rotating member 14 is moved upward. The rotating member 14 rotates against the elastic urging force of the elastic body 18, and the engaging pin 17 locked to the tip end of the operating rod 16 passes through the long holes 25, 25 of the tilting member 9. In this state, the front part of the armrest part 6 can be rotated up and down around the support shaft 10, and the finger is released from the operation part 12 after setting to a predetermined angle. For example, the engagement pin 17 is engaged with the corresponding engagement recess 13 by the elastic biasing force of the elastic body 18, and the set angle is maintained.
[0019]
As the elastic body 18, an example using a kick spring in which a coil portion is wound around the shaft cylinder 33 of the rotating member 14 and both elastic legs are engaged with the upper surface plate 19 of the tilting member 9 and the operation rod 15 is used. Although shown, it is possible to use a compression coil spring or a tension coil spring. However, since the upper cover member 26 and the lower cover member 27 are displaced relative to the tilting member 9, the elastic body 18 is provided between the tilting member 9 and the rotating member 14 that is displaced together with the tilting member 9. Should.
[0020]
Next, the left / right lateral movement and left / right angle adjustment mechanism of the armrest 6 will be described with reference to FIGS. 2, 3, 5, and 7 to 11. In this lateral movement and lateral angle adjustment mechanism, sliders 52 and 52 are respectively fitted to horizontal holding plates 21 and 21 provided at the front and rear ends of the tilting member 9, and the upper cover member is interposed via the sliders 52 and 52. 26 is attached to the inner upper surface of the inner cover 26 so as to be laterally movable by mounting plates 53, 53, and a guide groove 54 is provided in the width direction of the inner upper surface of the upper cover member 26, and the click member 55 can be moved along the guide groove 54. In addition to the fitting, the rotary shaft 56 protruding below the click member 55 is rotatably fitted in a circular hole 57 formed in the central portion of the upper surface plate 19 of the tilting member 9. In other words, the armrest portion 6 can adjust the angle horizontally around the rotation shaft 56, and the armrest portion 6 can be laterally moved by sliding the guide groove 54 with respect to the click member 55. It can be done.
[0021]
More specifically, a large number of reinforcing ribs 58 are formed on the inner lower surface of the upper cover member 26 in the form of a lattice in the vertical and horizontal directions, and the end surfaces of the reinforcing ribs 58 are set flush and surround the reinforcing ribs 58. The frame rib 59 having a high height is formed as described above, and a portion where the reinforcing rib 58 does not exist in the width direction is formed in the center portion, and this portion serves as the guide groove 54. The guide groove 54 has both side walls 58A, 58A formed by reinforcing ribs 58, 58 extending in the width direction, and the side wall 58A at the center position in the width direction of the upper cover member 26 and at the same distance from the center. , 58A are formed with notches 60,.
[0022]
As shown in FIG. 9, the click member 55 is made of a synthetic resin having a substantially circular outer shape in plan view, and has an oval portion 61 that engages with the guide groove 54 on the upper surface side, and the tilt on the lower surface side. A rotary shaft 56 that is rotatably engaged with the circular hole 57 of the member 9 is formed, and one side surface of the oval part 61 is formed from a position that is continuous with one end of the oval part 61 in the upper and lower intermediate part and is ¼. The elastic piece 62 is bent in the same manner, the elastic piece 62 extends from the other end of the oval part 61 in the same manner, and semi-cylindrical sliding parts 63 and 63 are formed at the ends of the elastic pieces 62 and 62, respectively. It is formed at the same height as the portion 61. Further, concave portions 64 and 64 for retracting the sliding portions 63 and 63 are formed on both side surfaces of the oval portion 61 corresponding to the sliding portions 63 and 63. Then, in a state where the rotation shaft 56 of the click member 55 is inserted into the circular hole 57 of the upper surface plate 19 of the tilting member 9, the oval part 61 of the click member 55 is elastically formed in the guide groove 54 of the upper cover member 26. The sliders 52 and 52 at both front and rear ends of the tilting member 9 are movably held and attached by mounting plates 53 and 53 screwed to the frame rib 59 of the upper cover member 26. Here, the mounting plate 53 includes a fixing portion 65 that is attached to the frame rib 59, a pressing portion 66 that is in sliding contact with the upper surface of the slider 52, and a vertical portion 67 between the fixing portion 65 and the pressing portion 66. In the vertical portion 67, a horizontally long opening 68 through which the slider 52 is inserted is formed. In a state where the slider 52 is held by the mounting plate 53, the slider 52 is slidably brought into contact with the pressing portion 66 and the fixing portion 65, and the slider 52 is fitted to the holding plate 21 in order to secure the contact pressure. A plurality of low ribs 69 are formed inside.
[0023]
The oval portion 61 of the click member 55 is engaged between both side walls 58A and 58A of the guide groove 54, and both sliding portions 63 and 63 are elastically pressed against the side walls 58A and 58A. As shown in FIG. 11, when the armrest portion 6 is moved in the lateral direction, the click member 55 moves relatively along the guide groove 54, and the notches 60 are formed in the center portion and both sides of the guide groove 54. When the sliding parts 63, 63 are located at the position, they stop at that position due to their elastic force. However, if the armrest part 6 is moved strongly, the sliding parts 63, 63 move away from the notches 60, 60. is there. That is, the armrest portion 6 can be adjusted by laterally moving the armrest portion 6 with respect to the support portion 5 at the central portion and the left and right three locations. Further, in a state where the armrest portion 6 is positioned at the center portion with respect to the support portion 5, the armrest portion 6 can be rotated by a predetermined angle left and right around the rotation shaft 56, and the left and right angle adjustment can be performed.
[0024]
Here, a joining structure between the upper cover member 26 and the lower cover member 27 will be briefly described. An inner step 70 is formed along the inner edge of the upper cover member 26 along the inner edge thereof, and an outer step 71 is formed along the outer edge of the lower cover member 27 along the inner edge thereof. It comes to match. A projection 72 is formed inward on one of the front and rear inner step portions 70 of the upper cover member 26, and a connecting hole for engaging the projection 72 on the corresponding outer step portion 71 of the lower cover member 27. 73, pedestals 74, 74 are formed in the other front and rear of the upper cover member 26, attachment holes 75, 75 are formed on the corresponding sides of the lower cover member 27, and the protrusion 72 is connected to the connection hole 73. And a screw 76 inserted from below into the mounting hole 75 is screwed into the base 74 and joined together. Further, since both members are made of synthetic resin, when the both side surfaces are pressed, the upper cover member 26 is restrained from inward deformation due to the fitting relationship between the inner step portion 70 and the outer step portion 71. The lower cover member 27 cannot suppress inward deformation only by the fitting relationship between the inner stepped portion 70 and the outer stepped portion 71. For this reason, restriction claws 77,..., Which protrude from the peripheral edge of the upper cover member 26 and continue from the frame rib 59, are provided to prevent inward deformation of the lower cover member 27.
[0025]
As described above, the armrest portion 6 can be moved left and right with respect to the support portion 5 and the left and right angles can be adjusted. Therefore, the lateral width of the opening 28 formed in the lower cover member 27 takes into account the left and right movement distance. Since it is set wide and the vertical angle can be adjusted, the front-rear width of the opening 28 is set wide with a slight margin. Therefore, when the front portion of the armrest 6 is raised and inclined upward, if there is no protective cover 78, the metal fittings such as the tilting member 9 and the periphery of the support shaft 10 are exposed as shown in FIG. Since there is a possibility that a finger may be caught in the exposed portion, the tilting member 9 is provided with a protective cover 78 to prevent finger filling as shown in FIGS. 5, 6, 12 and 13. It should be noted that when the armrest portion 6 is moved left and right with respect to the support portion 5, it is large so that the finger is not caught between the protective cover 78 and the lip of the opening 28. A gap of at least 6 mm is formed to prevent injury.
[0026]
The protective cover 78 is located in the opening 28 of the lower cover member 27 and is attached to the tilting member 9 by being externally fitted. The outer shape of the protective cover 78 has an upwardly expanding shape, an opening 79 for receiving the support portion 5 is formed at the center, a protrusion piece 80 is provided at the front end, and both sides of the tilting member 9 are provided. The engaging claws 83, 83 formed on the rear inner surfaces of the side plates 82, 82 are engaged with the recesses 81, 81 formed at the front ends of the face plates 20, 20, and the rear portions of the side plates 20, 20 of the tilting member 9. The engagement holes 84, 84 formed in the above-mentioned are fixedly engaged and attached. In addition, notches 85 are formed in the front and rear portions of the protective cover 78 in order to release the operation of the rotating member 14 and to release the side plates 20 and 20 of the tilting member 9. Further, longitudinal ribs 86,... Are formed on the inner surfaces of the side plates 82, 82 so as to be elastically fitted to the upper end portion of the elevating body 8. The shape of the protective cover 78 should be determined according to the shape of the tilting member 9, and the shape is not particularly limited.
[0027]
Further, as another example of the left / right lateral movement and left / right angle adjustment mechanism of the armrest portion 6, the one shown in FIG. 14 has a shaft portion 87 protruding from the center portion of the upper surface plate 19 of the tilting member 9, C-shaped engaging portions 88 and 88 that elastically engage the shaft portion 87 at the center portion and both left and right side portions thereof are provided so as to protrude from the lower surface of the upper cover member 26 with their open portions facing each other. In this case, when the shaft portion 87 is engaged between the both engaging portions 88, 88, the armrest portion 6 can be adjusted in the left-right angle, and if the shaft portion 87 is fitted into one engaging portion 88. It will move from side to side.
[0028]
In addition, since the armrest portion 6 according to the present embodiment can be moved laterally from side to side, the width is inevitably widened, and it becomes difficult to operate the operation portion 12 of the operation lever 11 provided on the lower surface. In order to improve, inclined surfaces 27A and 27A are formed on the lower surfaces of the left and right sides of the lower cover member 27 to improve the wrapping of the finger into the operation unit 12.
[0029]
Finally, the height adjusting mechanism will be briefly described with reference to FIGS. The height adjusting mechanism is formed with a vertical hole 89 along the central portion of the support plate 43 extending at the upper end of the support arm 7 and is formed with an engaging recess 90 at a predetermined interval on the front edge of the vertical hole 89. ..., and an opening 91 is formed at a position corresponding to the support plate 43 at the front portion of the elevating body 8, and a guide portion 92 extending back and forth is formed in the interior facing the opening 91, A pair of actuating members 94 and 95 that hold both end portions of the engaging pin 93 penetrating the engaging recess 90 or the vertical hole 89 from the front and rear are provided in the guide portion 92 so as to be slidable in the front and rear directions, and inwardly operated. An operating body 98 having an elastic body 97 made of a compression coil spring disposed between the member 95 and the inner wall 96 of the elevating body 8 and elastically energized forward, and pivotally mounted at the upper and lower ends in the opening 91 so as to be able to rotate back and forth. The elastic piece 99 formed integrally with the free end of the outer working member 9 It is made in contact with.
[0030]
When adjusting the height of the armrest 6, if the lower part of the operation lever 98 is pushed into the opening 91, the engagement pin 93 is further pushed against the elastic biasing force of the elastic body 97. When the position of the vertical hole 89 is reached, the armrest 6 can be held and the height thereof can be adjusted. When the armrest 6 is moved up and down to reach a predetermined height, when the finger is released from the operation lever 98, the engagement pin 93 is engaged with any of the engagement recesses 90 by the elastic biasing force forward of the elastic body 97. To maintain the set height.
[0031]
【The invention's effect】
The armrest device for a chair according to the present invention as described above is an armrest device for a chair in which the armrest portion can be adjusted in the vertical and horizontal directions and / or the horizontal angle can be adjusted with respect to the support portion rising from the seat or the leg. In the armrest section vertical angle adjustment mechanism, an operating lever is provided on the cover member of the armrest section, and the operation hole for exposing the operation section can be set to the minimum size, but the armrest section The vertical angle adjustment can be performed together with the horizontal movement and the horizontal angle adjustment.
[Brief description of the drawings]
FIG. 1 is a side view of a chair to which an armrest device of the present invention is applied.
FIG. 2 is a longitudinal sectional view when the armrest is set in a horizontal state.
FIG. 3 is a longitudinal sectional view when the armrest is set in an inclined state.
FIG. 4 is an exploded perspective view showing a structure for pivotally attaching a support portion and an armrest portion.
FIG. 5 is an exploded perspective view showing a main part of the present invention.
FIG. 6 is an exploded perspective view showing the relationship between the tilting member and the protective cover.
FIG. 7 is an exploded sectional view showing a structure of a cover member of an armrest portion.
FIG. 8 is a perspective view of an upper cover member.
9A and 9B show a click member, where FIG. 9A is a plan view and FIG. 9B is a side view.
FIG. 10 is a partial cross-sectional view showing a state where a click member is mounted.
FIG. 11 is a simplified cross-sectional view showing a lateral movement and a lateral angle adjustment mechanism.
FIG. 12 is an abbreviated side view showing a state where a protective cover is attached.
FIG. 13 is a similar bottom view.
FIG. 14 is an abbreviated cross-sectional view showing another example of a lateral movement and lateral angle adjustment mechanism.
FIG. 15 is a simplified explanatory view showing the operation state of the operation lever by placing a hand on the armrest portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest apparatus 5 Support part 6 Armrest part 7 Support arm 8 Lifting body 9 Tilt member 10 Support axis 11 Operation lever 12 Operation part 13 Engaging recessed part 14 Turning member 15 Operation rod 16 Actuation杆 17 engaging pin 18 elastic body 19 upper surface plate 20 side surface plate 21 holding plate 22 shaft hole 23 shaft pin 24 through hole 25 long hole 26 upper cover member 27 lower cover member 28 opening 29 operation hole 30 shaft portion 31 bearing portion 32 bearing Hole 33 Axle tube 34 Locking portion 35 Rack member 36 Side piece 37 Block body 38 Engaging claw 39 Supporting piece 40 Protruding portion 41 Substrate 42 Engaging hole 43 Support plate 44 Sliding hole 45 Vertical plate 46 Locking hole 47 Claw piece 48 Bearing portion 49 Holding piece 50 Shaft hole 51 Shaft hole 52 Slider 53 Mounting plate 54 Guide groove 55 Click member 56 Rotating shaft 57 Circular hole 58 Reinforcement rib 59 Frame rib 60 Notch portion 61 Oval portion 62 Elastic piece 63 Sliding portion 64 Recessed portion 65 Fixed portion 66 Presser portion 67 Vertical portion 68 Horizontal opening 69 Rib 70 Inner step portion 71 Outer step portion 72 Projection 73 Connection hole 74 Base 75 Mounting hole 76 Screw 77 Restriction claw 78 Protective cover 79 Opening 80 Projection piece 81 Recess 82 Side plate 83 Locking claw 84 Engagement hole 85 Notch opening 86 Rib 87 Shaft part 88 Engagement part 89 Vertical hole 90 Engagement recessed part 91 Opening 92 Guide part 93 Engagement Pin 94 Actuating member 95 Actuating member 96 Inner wall 97 Elastic body 98 Operation lever 99 Elastic piece

Claims (4)

An armrest device of a chair in which an armrest portion can be adjusted in vertical angle and laterally movable and / or adjustable in left and right angles with respect to a support portion rising from a seat portion or a leg portion, and a tilting member is horizontally disposed on an upper end of the support portion It is connected so that it can be tilted up and down with a support shaft, and the cover member of the armrest is attached to the tilting member so that it can be moved laterally and / or rotated. The operation portion is exposed on the lower surface, a plurality of engagement recesses are formed on the front surface side of the upper end portion of the support portion, and the center portion extends forward of the rotating member pivotally attached to the front portion of the tilting member. The operating rod is brought into contact with the upper surface of the operating lever, and an engaging pin engaged with the tip of the operating rod extending downward from the rotating member can be engaged with the engaging recess, and further the rotating When the engaging pin engages with the engaging recess, Armrest apparatus chair and characterized by being elastically urged in the direction. The lateral width of the operating lever is set so that the tip of the operating rod of the rotating member is always in contact with the upper surface of the operating lever even when the cover member is laterally moved or rotationally displaced with respect to the tilting member. The chair armrest device according to claim 1. A long hole is formed in the both side plates of the tilting member along a trajectory along which the engaging pin moves as the rotating member rotates, and both end portions of the engaging pin are slidably engaged in the long hole. The armrest device for a chair according to claim 1 formed together. The supporting recess is formed by forming the engaging recess in a metal rack member, fitting the rack member to an upper front end portion of the block body, and fitting the block body into the upper end portion of the cylindrical support portion. The armrest device for a chair according to claim 1, wherein a rack member is fixed to an upper end portion of the portion.

Images