TWM454141U - Adjustment mechanism for armrest - Google Patents

Description

Handrail adjustment mechanism

The present invention relates to a handrail adjustment mechanism, and more particularly to an armrest that has both front and rear displacement, lateral displacement, and safety 360 degree rotation angle adjustment.

The general office chair armrest includes an armrest and an armrest bracket. The armrest is generally composed of an armrest surface and a lower disc body, and the armrest is disposed on the top surface of the armrest bracket, and the armrest bracket is locked on the left and right sides of the seat. . Handrail adjustment The type can be divided into horizontal adjustment and height adjustment. The height adjustment mechanism is used to adjust the height of the handrail, which is generally set on the armrest bracket; the horizontal adjustment is generally used to adjust the front and rear position of the handrail, and the left and right position (ie, adjustment) The width or angle between the left and right handrails is generally set on the armrest body; although there are many different adjustment mechanisms at present, it can be adjusted with a simple structure but also with front and rear shift, lateral shift and angle rotation. The efficacy is rare.

In the technical field of the handrail adjustment mechanism, the applicant of the case obtained the US invention patent US 7,159,947 and related Taiwan, mainland, Germany and other new patents in 2007; however, in the current handrail adjustment mechanism, especially this When the creation of the specially designed 360-degree rotation adjustment, there is no need for a safety auxiliary structure to avoid danger during use. For example, if the operator needs to adjust the angle, if a safety start-up procedure is not added, if no angle adjustment is added. When the control button is activated, when the positioning function is tired, the armrest is easily rotated by an accidental or inadvertent collision, which is easy to cause danger in use; the handrail specially designed for 360 degree angle adjustment is quite equivalent. It is creative and market-oriented, but if the start-up control button is not provided, it is easy to cause improper operation or danger. Therefore, how to simplify the start-up control button when adding an angle adjustment to the limited space of the handrail is desired. Solve and overcome problems.

The main purpose of the present invention is to provide an armrest adjustment structure, the armrest is locked on a top surface of an armrest bracket, and the armrest adjustment structure is composed of a handrail surface, a lower tray body, a chassis, a movable block, and a rectangular shape. a sheet, a hat-shaped disc, a plurality of positioning rings and a matching elastic member to make the support The hand achieves the effect of front and rear movement, lateral displacement, and a safe 360 degree rotation angle with respect to the armrest bracket.

In order to achieve the above object, a preferred embodiment of the armrest adjustment structure of the present invention comprises an armrest which is integrally locked with a lower body by an armrest surface to form a chamber between the two, and then in the chamber A movable block having a smaller length is disposed inside the disc body, and an elastic positioning ring is disposed on the left and right sides of the movable block to correspond to a plurality of circular arc grooves on the left and right sides of the inner portion of the lower disc body. Forming the in-line positioning groove, the movable block and the lower plate body can be moved forward and backward relative to each other; and the movable block is provided with a rectangular groove, and the rectangular groove is provided with a rectangle having a small lateral width a circular arc groove for positioning on one side of the rectangular piece, so that the rectangular piece and the rectangular groove can be laterally moved and positioned laterally relative to each other; and the circular piece is provided with a circular groove, the circle a hat-shaped disc is disposed in the groove, the cap-shaped disc is provided with a central hole, the central hole passes downwardly through the rectangular piece and a bottom sliding groove of the movable block, and a spring and a nut are used to Elastically locked on a central stud of a chassis piece, the chassis piece is fixed on the support a top surface of the bracket; and at least one positioning protrusion disposed on the inner surface of the cap-shaped disc can be selected to be correspondingly embedded in a plurality of positioning holes arranged in an annular equidistant manner on the top surface of the central stud Or elastic separation, so that the hat-shaped disc and the bottom frame can be rotated and positioned relative to each other by 360 degrees; thereby, the armrest is displaced forward, laterally, and safely 360 degrees with respect to the armrest bracket. The effect of adjusting the angle of rotation.

In order to make the creation more clear and detailed, the preferred embodiment and the following illustrations are used to describe the structure and technical features of the present invention as follows: Referring to Figures 1-3, the armrest 1 of the present invention is locked in one Armrest bracket 2 The top surface comprises: a handrail surface 10, a lower disk body 20, a chassis 30, a movable block 40, a rectangular piece 50, a hat-shaped disk 60, a plurality of positioning rings 70 and matching elastic members. 71. Wherein, the armrest 1 can be moved back and forth with respect to the armrest bracket 2 as indicated by an arrow A or left and right as indicated by an arrow B or rotated 360 degrees as indicated by an arrow C.

The armrest surface 10 is composed of a combination of a cushion layer 11 and a hard layer 12, which may be plastic, rubber or foam to provide a good touch of the human hand; the hard layer 12 may be The iron plate or the plastic plate is provided with a plurality of locking screw holes 13 on the inner side of the upper ring to be correspondingly locked with the plurality of screw holes 21 provided on the lower plate body 20, but the armrest surface 10 and the lower plate body 20 The locking relationship between the two is not limited, so the corresponding locking relationship between the plurality of screw holes 13 and the plurality of screw holes 21 is not intended to limit the present creation.

The lower disc body 20 is a plastic shell for locking and integral with the hard layer 12, and forms a space between the armrest surface 10 and the lower disc body 20, that is, a rectangular inner space for setting adjustment. member. The left and right sides of one side (front side or rear side but not limited) of the lower body 20 are provided with two symmetrical straight row positioning grooves 22, which are arranged by a plurality of arc slots 23 of equal size; The inside of the disk body 20 is provided with two symmetric elongated flanges 24 on the left and right sides of the other side (ie, the rear side or the front side) of the position of the inline positioning groove 22, but is not limited, and is formed below the elongated flange 24. a chute.

The underframe 30 is fixed on the top surface of the armrest bracket 2 for supporting the armrest 1 of the present invention and enabling the armrest 1 to be movably locked to the top surface of the armrest bracket 2. The chassis 30 of the embodiment is a disk body, but is not limited. The chassis 30 is provided with a plurality of locking holes 31 at a proximal edge thereof for locking the chassis by a fastener such as a screw (not shown). 30 is locked on the top surface of the armrest bracket 2; a center of the chassis 30 is provided with a protrusion 32 of a suitable height, the protrusion A center hole 33 is defined in the center of the top surface of the column 32 and passes downwardly to a recess 34 provided at the bottom of the chassis 30 as shown in FIG. 4-5; the top surface of the protrusion 32 is provided with a plurality of Positioning holes 35 arranged in an annular equidistant manner.

The movable block 40 is movably sleeved in the lower disc body 20, and its length (forward and backward length) is smaller than the inner length of the lower disc body 20, and the left and right (lateral) edges thereof can be placed in the strip shape. In the lower chute of the flange 24, the lower disc body 20 can be stably slidably forward and backward with respect to the movable block 40 as shown in FIG. 7; the left side and the right side of the front side or the rear side of the movable block 40 Two symmetrical slots 41 are provided for respectively accommodating a positioning ring 70 and an elastic member 71 for elastically pressing the positioning ring 70 so that the positioning ring 70 can be elastically pressed against the lower body 20 The in-line positioning slot 22 or one of the arcuate slots 23; when the movable block 40 slides back and forth in the lower disc 20, the movable block 40 can be engaged with the in-line positioning slot 22 by the positioning ring 70. Positioned by a circular arc groove 23. A rectangular recess 42 is disposed in the middle of the movable block 40. One side of the inner side of the rectangular recess 42 is provided with a lateral rail 43, and a lateral groove 44 is disposed at a middle portion thereof; one side of the rectangular recess 42 A locating ring 45 is provided for accommodating a positioning ring 70 and an elastic member 71 for elastically pressing the positioning ring 70 so that the positioning ring 70 can be elastically pressed in the direction of the rectangular groove 42.

The rectangular piece 50 is movably sleeved in the square groove 42. One side of the rectangular piece 50 is provided with an opening downward guiding groove 51 for correspondingly sleeved on the guiding rail 43 to form a guiding effect; the rectangle The lateral width of the sheet 50 is smaller than the inner width of the rectangular recess 42 so as to be relatively slidable in the left and right directions in the rectangular recess 42; the rectangular sheet 50 is provided on the other side edge of the guide groove 51 The arcuate slots 52 are arranged in a laterally equidistant shape to correspond to the positioning ring 70 provided in the receptacle 45 of the movable block 40. When the rectangular piece 50 is at the moment When the groove 42 is laterally slidable, the positioning ring 70 disposed in the groove 45 is selectively and elastically engaged with one of the plurality of circular arc grooves 52 to be positioned; the rectangular piece 50 is A circular groove 53 is defined, and a central hole 54 is defined in the bottom surface of the circular groove 53. The elastic member 71 can be a resilient rubber ring body, and the positioning ring 70 can be elastically protruded outward by the elastic toughness of the elastic member 71 itself.

The cap-shaped disc 60 is sleeved in the circular groove 53 of the rectangular piece 50, and a circular inner groove 61 is arranged at the bottom thereof, as shown in FIG. 2A, so as to be correspondingly sleeved on the chassis 30. The top surface 62 of the inner groove 61 is provided with at least one positioning protrusion 63, and three positioning protrusions 63 are provided as shown in FIG. 2A, but are not limited; the at least one positioning protrusion 63 The shape and the size are corresponding to the positioning holes 35 provided on the top surface of the protruding post 32 of the chassis 30, so that the at least one positioning protrusion 63 is selected downwardly and embedded in at least one of the plurality of positioning holes 35. Medium (as shown in FIG. 4) or elastically separated upward (as shown in FIG. 5); the center of the disc 60 is provided with a central hole 64 for engaging the central hole 33 provided at the center of the top surface of the stud 32. When assembled, the disc 60 is sleeved in the circular groove 53 of the rectangular piece 50, and the circular inner groove 61 is simultaneously sleeved on the protruding post 32 of the chassis 30, as shown in FIG. A locking fastener 65, such as a bolt, passes downwardly through the central opening 64 of the disc 60 and the central opening 33 of the chassis 30 such that the end of the locking member 65 is exposed in the recess 34 at the bottom of the chassis 30. Then, an elastic member 36, such as a compression spring, is firstly sleeved on the end of the locking member 65, and then locked to the end of the locking member 65 by a nut 37, so that the elastic member 36 is elastically supported and supported in the concave portion. Between the bottom surface of the groove 34 and the nut 37, the cap-shaped disc 60, the rectangular piece 50, the movable block 40 and the lower disc body 20 are up-to-the-blank by the lock 65 and the nut 37. Locked into a linked body (60, 50, 40, 20) And elastically pressing on the central stud 32 of the chassis 30 as shown in FIGS. 3 and 4; at this time, the at least one positioning protrusion 63 can be elastically embedded downwardly into the plurality of positioning holes by the elastic force of the elastic member 36. At least one of the positioning holes 35 in the 35 is positioned as shown in FIG. When the armrest surface 10 and the linkage body (60, 50, 40, 20) are lifted up together by the operator, as shown in FIG. 5, the at least one positioning projection 63 is elastically biased by the elastic member 36. The plurality of positioning holes 35 can be elastically moved upward for the operator to adjust the 360 degree angle as shown in FIG.

As can be seen from the above, the armrest surface 10 and the lower disc body 20 are locked into a handrail 1 of a linkage body, wherein the hat-shaped disc 60, the rectangular sheet 50, the movable block 40 and the lower disc body 20 are The locking member 65 and the nut 37 are locked into a linkage body (60, 50, 40, 20) and elastically pressed on the central boss 32 of the chassis 30 as shown in FIGS. 3 and 4, so that the operator only needs to lift up. The armrest surface 10 or the armrest 1 is lifted, and the interlocking body (60, 50, 40, 20) can be lifted up at the same time. The chassis 30 is integrally fixed with the armrest bracket 2, so that the chassis 30 is fixed relative to the armrest bracket 2; the cap-shaped disc 60 is sleeved by the elastic force of the elastic member 36. On the boss 32 of the chassis 30, the cap-shaped disk 60 is fixed relative to the chassis 30 (ie, the armrest bracket 2) in the left and right and front and rear directions, but can be moved up and down to make the at least one The positioning protrusions 63 can be elastically inserted into at least one of the plurality of positioning holes 35 by the elastic force of the elastic member 36 to be positioned to be elastically separated from the plurality of positioning holes 35 as shown in FIG. 4 or upwardly. The operator can adjust the angle of the armrest 1 by 360 degrees as shown in Figs.

In use, the armrest 1 can be adjusted relative to the armrest bracket 2 for forward and backward movement, left and right movement or 360 degree rotation, respectively, as follows:

(1) The handrail 1 is adjusted before and after the movement: due to the linkage (10, 20) slidable back and forth relative to the movable block 40, that is, the movable block 40 and the rectangular piece 50 and the hat-shaped disk 60 are kept stationary, and the handrail 1 can be operated by the person, that is, the linked body (10, 20) And moving forward and backward with respect to the movable block 40 as shown by an arrow A in FIG. 7 such that the interlocking body (10, 20) combined with the armrest surface 10 and the lower disk body 20 is opposed to the movable block 40 by A first position is moved to a second position as shown in FIG. 6 and can be positioned by the positioning ring 70 elastically engaging an arc groove 23 in the positioning groove 22 after the forward and backward movement adjustment. In the second position as shown in FIG.

(2) The left and right movement adjustment of the armrest 1 is: the movable block 40 is slidable laterally with respect to the rectangular piece 50 and the hat-shaped disk 60, that is, the rectangular piece 50 and the hat-shaped disk 60 are both Keeping the armrest 1, the interlocking body (10, 20) and the interlocking body (10, 20, 40) reconstituted by the movable block 40, with respect to the rectangular piece 50 and the hat shape The disc 60 is moved left and right as shown by an arrow B in FIG. 8 such that the interlocking body (10, 20, 40) of the armrest surface 10, the lower disc body 20 and the movable block 40 is opposite to the rectangular sheet 50. Moving from a first position to a third position as shown in FIG. 8 , as shown in FIG. 8 , and elastically engaging an arc of the plurality of circular arc grooves 52 by the positioning ring 70 after the left and right movement adjustment The slot 52 is positioned in a third position as shown in FIG.

(3) 360-degree rotation adjustment of the armrest 1: When the armrest 1 is adjusted to the movement adjustment or the left-right movement before the above-mentioned movement, the movement adjustment distance has a certain range limitation, so that the operator is not caused Excessive movement is dangerous. However, when the armrest 1 is adjusted for 360-degree rotation, the 360-degree rotation is adjusted to be reversible or clockwise, and there is no limit to the range, so that the operator is likely to be excessively rotated and dangerous, so this creation is especially in 360. Add a start control before the rotation adjustment The key, that is, the operator must first lift the armrest 1 upwards, and the armrest surface 10 and the linkage body (60, 50, 40, 20) are originally raised by the protrusion 63 as shown in FIG. The state in which the holes 35 are fitted is lifted up together to form a state in which the projection 63 is disengaged from the positioning hole 35 as shown in FIG. 5, and the operator can rotate the armrest 1 (handrail surface 10) for 360-degree angle adjustment. As shown by the arrow C in FIG. After the armrest surface 10 and the linkage body (60, 50, 40, 20) are rotated relative to the central post 32 of the chassis 30 by a first position as shown in FIG. 6, to a desired fourth position, As shown by the dashed line in FIG. 9, the armrest 1 can be released. At this time, the at least one positioning protrusion 63 can be elastically inserted downward into the positioning holes 35 by another elastic force of the elastic member 36. The hole 35 is positioned to position the fourth position as shown in FIGS. 5 and 9, and the 360 degree angle adjustment effect of the armrest is completed.

The above description is only the preferred embodiment of the present invention, and is merely illustrative and not limiting. It will be apparent to those skilled in the art that many changes, modifications, and equivalents may be made without departing from the spirit and scope of the invention.

1‧‧‧Handrail

2‧‧‧Handrail bracket

10‧‧‧Handrail

11‧‧‧Cushion

12‧‧‧ Hard layer

13‧‧‧ screw holes

20‧‧‧Down body

21‧‧‧ screw holes

22‧‧‧Direct row positioning slot

23‧‧‧ arc slot

24‧‧‧Flange

30‧‧‧ Chassis

31‧‧‧Lock hole

32‧‧‧Bump

33‧‧‧ center hole

34‧‧‧ Groove

35‧‧‧Positioning holes

36‧‧‧Flexible parts

37‧‧‧ nuts

40‧‧‧ activity block

41‧‧‧ 容容

42‧‧‧Rectangular groove

43‧‧‧rail

44‧‧‧ trench

45‧‧‧ 容容

50‧‧‧Rectangle

51‧‧‧Guide

52‧‧‧Arc groove

53‧‧‧Circular groove

54‧‧‧ center hole

60‧‧‧hat disc

61‧‧‧ Inside groove

62‧‧‧ inside top

63‧‧‧ bumps

64‧‧‧ center hole

65‧‧‧Locker

70‧‧‧ positioning ring

71‧‧‧Flexible parts

Fig. 1 is a perspective view showing the state of use of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

Figure 2A is a perspective view of another perspective (bottom view) of the disc in the present creation.

FIG. 3 is a schematic diagram of a partial combination state of FIG. 2. FIG.

4 is a side cross-sectional view showing a partial structure of an embodiment of the present invention when the armrest is not rotated 360 degrees.

Figure 5 is a partial view of an embodiment of the present invention when a 360-degree rotating handrail is to be performed. A schematic cross-sectional view of the structure.

Figure 6 is a top plan view of the armrest of the present embodiment in a first position.

FIG. 7 is a schematic diagram of the first embodiment of the present invention being adjusted from the first position to the second position.

FIG. 8 is a schematic diagram of the first embodiment of the present invention being adjusted from the left and right positions of the first position of FIG. 6 to a third position.

FIG. 9 is a schematic view showing an embodiment of the present invention from a 360-degree rotation of the first position of FIG. 6 to a fourth position.

1‧‧‧Handrail

2‧‧‧Handrail bracket

10‧‧‧Handrail

11‧‧‧Cushion

12‧‧‧ Hard layer

13‧‧‧ screw holes

20‧‧‧Down body

21‧‧‧ screw holes

22‧‧‧Direct row positioning slot

23‧‧‧ arc slot

24‧‧‧Flange

30‧‧‧ Chassis

31‧‧‧Lock hole

32‧‧‧Bump

33‧‧‧ center hole

35‧‧‧Positioning holes

36‧‧‧Flexible parts

37‧‧‧ nuts

40‧‧‧ activity block

41‧‧‧ 容容

42‧‧‧Rectangular groove

43‧‧‧rail

44‧‧‧ trench

45‧‧‧ 容容

50‧‧‧Rectangle

51‧‧‧Guide

52‧‧‧Arc groove

53‧‧‧Circular groove

54‧‧‧ center hole

60‧‧‧hat disc

64‧‧‧ center hole

65‧‧‧Locker

70‧‧‧ positioning ring

71‧‧‧Flexible parts

Claims (4)

An armrest adjusting structure is disposed on a top surface of an armrest bracket, and includes an armrest surface, a lower disc body, a bottom frame, a movable block, a rectangular piece, a hat-shaped disc and a plurality of positioning rings. The matching elastic member, wherein: the armrest surface is correspondingly locked and integrated with the lower disc body, so that a rectangular inner space is formed between the armrest surface and the lower disc body for providing an adjusting member; the lower disc body, The left side and the right side of the inner side are symmetrically disposed with two straight positioning grooves formed by a plurality of circular arc grooves; the movable block is movably sleeved in the lower disc body, and the length thereof is smaller than the inner length of the lower disc body, and Two symmetric pockets are disposed on the left and right sides of the one side for respectively accommodating a positioning ring and an elastic member for pressing the positioning ring to correspond to the in-line positioning groove in the lower disc body, so that the opposite body can be opposite in the lower disc body Sliding back and forth, and positioning by the positioning ring elastically in a circular arc groove in the straight row positioning groove, and a rectangular groove is arranged in the middle of the rectangular groove, and a lateral groove is arranged in the middle of the rectangular groove, and a rectangular groove is provided on one side of the rectangular groove for accommodating one a position ring and an elastic member for pressing the positioning ring, the positioning ring can be elastically pressed into the rectangular groove; the chassis is fixed on the top surface of the armrest bracket, and a proper height is arranged in the center thereof a convex column, the center of the top surface of the protruding column is provided with a central hole and passes downward to a groove provided at the bottom of the chassis, and the top surface of the protruding column is arranged in a plurality of annular equidistance Positioning hole; the rectangular piece is movably sleeved in the rectangular groove of the movable block, the lateral width thereof is smaller than the inner width of the rectangular groove, and a plurality of circular arc grooves are arranged on one side edge thereof Corresponding to the groove of the movable block, when it is relatively laterally slid in the rectangular groove, the positioning ring in the cavity can be elasticized Positioning one of the circular arc grooves, and a circular groove is arranged near the middle thereof, and a bottom hole is provided on the bottom surface of the circular groove; the hat-shaped disk is sleeved on the circle of the rectangular piece The bottom of the inner groove is provided with a circular inner groove corresponding to the protruding post of the bottom frame, and the inner surface of the inner groove is provided with at least one positioning protrusion, the at least one positioning convex The shape and the size of the cap are corresponding to the positioning holes provided on the top surface of the stud of the chassis. The center of the cap-shaped disc is provided with a central hole to fit the central hole of the stud of the chassis, wherein a locking firmware passes down through the central hole of the cap-shaped disc and the central hole of the chassis to expose the end of the locking member in the groove at the bottom of the chassis, and then borrows an elastic member and a nut Nesting and locking on the end of the fastener, so that the elastic member is elastically compressed between the bottom surface of the groove and the nut, thereby making the cap-shaped disc, the rectangular piece, the movable block and the The lower tray body sequentially constitutes a linkage body from top to bottom and is elastically pressed on the central protrusion of the chassis; wherein the at least one positioning protrusion is The elastic force of the sexual component can be elastically embedded in at least one of the plurality of positioning holes to be positioned downward; wherein the at least one positioning protrusion is elasticized when the armrest surface and the linkage body are lifted upward The elastic force of the member is elastically disengageable upwardly from the plurality of positioning holes for 360 degree angular adjustment relative to the chassis; wherein the armrest surface and the lower disk body are locked into an interlockable armrest; wherein the lower plate body Sliding back and forth relative to the movable block, so that the armrest can be adjusted for front and rear displacement; wherein the movable block can slide laterally relative to the rectangular piece, so that the handrail can be adjusted for lateral displacement; wherein when the arm is used When the shaped disc, the rectangular piece, the movable block and the linkage body of the lower disk body are lifted up, the chassis can be performed relative to the chassis 360 degree angle adjustment, so that the armrest can be adjusted 360 degrees. The armrest adjustment structure according to claim 1, wherein the left and right sides of the inner side of the lower disc body are provided with two symmetrical long flanges, so that a sliding groove is formed under the long flange to make the movable block The lateral edge can be placed into the chute below the long flange to slide. The armrest adjustment structure according to claim 1, wherein a lateral rail is disposed on one side of the rectangular groove, and a corresponding lateral groove is disposed on one side of the rectangular piece, so that the lateral groove can be correspondingly arranged. On the lateral rail inside the square groove. The armrest adjustment structure according to claim 1, wherein the elastic member is a resilient rubber ring body.