Seating device

Abstract

A seating device includes a headrest movably connected to a seat body. An adjustment mechanism is provided to adjust the position of the headrest relative to the seat body. An operating unit has a driving member to actuate the adjustment mechanism, and a handle portion bending from the driving member. The driving member is movable between non-operative and operative positions. In the non-operative position, the handle portion abuts against the headrest, and the driving member is inoperative to actuate the adjustment mechanism. In the operative position, the handle portion protrudes outward from the headrest, and the driving member is able to actuate the adjustment mechanism.

Claims

1. A seating device comprising: a seat body; a headrest movably connected to said seat body; an adjustment mechanism connected between said seat body and said headrest to adjust a position of said headrest relative to said seat body; and an operating unit movably mounted to said headrest and having a driving member to actuate said adjustment mechanism, said driving member being movable between a non-operative position and an operative position, wherein, when said driving member is in the non-operative position, said driving member is inoperative to transmit an actuation movement to said adjustment mechanism for actuating said adjustment mechanism, wherein, when said driving member is in the operative position, said driving member is operative to transmit the actuation movement to said adjustment mechanism, and wherein, said operating unit further has a handle portion bending from said driving member.

2. The seating device as claimed in claim 1, wherein, when said driving member is in the operative position, said handle portion is spaced away and protrudes from an outer surface of head rest.

3. The seating device as claimed in claim 1, further comprising a resilient member urging said driving member to move to the non-operative position.

4. The seating device as claimed in claim 3, wherein said adjustment mechanism includes a driven member movably mounted to said headrest, said driving member having an active transmitting part, said driven member having a passive transmitting part that engages said active transmitting part in the operative position and disengages from said active transmitting part in the non-operative position, said driving member being able to transmit the actuation movement to said driven member when said passive transmitting part engages said active transmitting part.

5. The seating device as claimed in claim 4, wherein one of said driving and driven members has an engaging hole, the other one of said driving and driven members having an engaging pin inserted into said engaging hole, said active transmitting part being situated at one of said engaging hole and pin, said passive transmitting part being situated at the other one of said engaging hole and pin.

6. The seating device as claimed in claim 5, wherein said engaging hole is elongated and surrounded by a hole boundary, said engaging pin being slidable within said engaging hole.

7. The seating device as claimed in claim 6, wherein said driving member has said engaging hole, said driven member having said engaging pin.

8. The seating device as claimed in claim 7, wherein said handle portion abuts against said outer surface disposed at a top end of said headrest when said driving member is in the non-operative position, and is spaced away from said top end of said headrest to protrude upwardly when said driving member is in the operative position.

9. The seating device as claimed in claim 8, wherein said engaging hole is elongated in a top-bottom direction of said headrest, said active transmitting part being situated at a bottom side of said hole boundary of said engaging hole.

10. The seating device as claimed in claim 9, wherein said resilient member normally applies a downward urging force to said driving member.

11. The seating device as claimed in claim 3, wherein said resilient member connects between said driving member and said headrest.

12. The seating device as claimed in claim 11, wherein said driving member has an engaging hole, said resilient member having an end extending into said engaging hole so as to be attached to said driving member.

13. The seating device as claimed in claim 8, wherein said headrest further has a guide member having a guide groove extending in a top-bottom direction, said driving member slidably extending downward through said guide groove from said handle portion.

14. The seating device as claimed in claim 4, wherein said adjustment mechanism further includes a first locking unit mounted to said seat body, and a second locking unit connected to said driven member and interlockable with said first locking unit to lock said headrest against movement relative to said seat body, said second locking unit being uninterlocked with said first locking unit to allow movements of said headrest relative to said seat body when said driving member actuates said driven member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, of which:

(2) FIG. 1 is a perspective view illustrating a seating device according to an embodiment of the disclosure;

(3) FIG. 2 is another perspective view of the seating device viewed in a different direction, which illustrates an operating unit in a non-operative state;

(4) FIG. 3 is a view similar to FIG. 2, but illustrating the operative unit in an operative state;

(5) FIG. 4 is a sectional view of FIG. 2;

(6) FIG. 5 is a sectional view of FIG. 3;

(7) FIG. 6 is a sectional view illustrating a spring tensioned by the operating unit in the operative state;

(8) FIG. 7 is a perspective view illustrating a driving member of the operating unit being fully uncovered;

(9) FIG. 8 is an enlarged view of an encircled portion of FIG. 7;

(10) FIG. 9 is a fragmentary perspective view illustrating first and second locking units of the adjustment mechanism being interlocked; and

(11) FIG. 10 is similar to FIG. 9, but illustrating the first and second locking unit being uninterlocked.

DETAILED DESCRIPTION

(12) FIGS. 1 to 3 illustrate a seating device 100 according to an embodiment of the disclosure. The seating device 100 includes a seat body 4, a headrest 5, an adjustment mechanism 6, and an operating unit 1.

(13) The seat body 4 is mounted on a base 7 and has a backrest portion 41.

(14) The headrest 5 is movably connected to the backrest portion 41 of the seat body 4. As shown in FIGS. 2 to 4, the headrest 5 has a guide member 51 disposed below a top end 5a of the headrest 5. The guide member 51 has a guide groove 510 extending in a top-bottom direction, and is integral with a generally U-shaped guide frame 50 fixed to the back side of the headrest 5.

(15) The adjustment mechanism 6 is connected between the seat body 4 and the headrest 5 to adjust the height or position of the headrest 5 relative to the seat body 4. The adjustment mechanism 6 includes a first locking unit 611 (see FIG. 1), a driven member 610 and a second locking unit 613. The first locking unit 611 is formed as a toothed rack mounted to the backrest portion 41 of the seat body 4. The driven member 610 is U-shaped and movably mounted to the headrest 5. The second locking unit 613 is connected to the driven member 610 and has a tooth-engaging shaft 6130 (see FIG. 2) interlockable with the first locking unit (the toothed rack) 611 to lock the headrest 5 against movement relative to the seat body 4 (FIGS. 1 and 9). Further structural details of the adjustment mechanism 6 are not intended to be disclosed herein as they are irrelevant to the scope of protection to be sought by the present disclosure.

(16) The operating unit 1 is movably mounted to the headrest 5, and has a driving member 11 to actuate the driven member 610, and a handle portion 12 bending from the driving member 11. As shown in FIGS. 3, 4 and 5, the driving member 11 slidably extends downward through the guide groove 510 from the handle portion 12. The driving member 11 is movable along the guide groove 510 between a non-operative position and an operative position.

(17) In the non-operative position, the driving member 11 is inoperative to transmit an actuation movement of the handle portion 12 to the driven member 610 of the adjustment mechanism 6. In the operative position, the driving member 11 is operative to transmit the actuation movement to the driven member 610.

(18) As shown in FIGS. 2, 6 and 7, the driving member 11 has two engaging holes 111. The driven member 610 has two engaging pins 614 (see FIG. 7). The driving member 11 is movably connected to the driven member 610 of the adjustment mechanism 6 by inserting the engaging pins 614 into the respective engaging holes 111.

(19) Each engaging hole 111 is elongated in a top-bottom direction and has a hole boundary. Each engaging pin 614 is slidable along the respective engaging hole 111. The driving member 11 has active transmitting parts 1111, each of which is situated at a bottom side of the hole boundary of the respective engaging hole 111. The driven member 610 has passive transmitting parts 6140 each of which is situated at a bottom side of one of the engaging pin 614 and faces the active transmitting part 1111 of the respective engaging hole 111.

(20) The term “active transmitting part” used herein refers to a part of the driving member 11, at which the actuation movement is delivered to the driven member 610. The term “passive transmitting part” used herein refers to a part of the driven member 610 at which the actuation movement is received by the driven member 610. The active transmitting parts 1111 of the driving member 11 engage the respective passive transmitting parts 6140 of the driven member 610 in the operative position and disengage from the respective passive transmitting parts 6140 in the non-operative position.

(21) Specifically, as shown in FIGS. 3, 5 and 6, when the driving member 11 is in the operative position, the handle portion 12 is spaced away and protrudes from the outer surface of the top end 5a of the headrest 5. As the passive transmitting parts 6140 of the engaging pins 614 respectively engage the active transmitting parts 1111 of the engaging holes 111, the actuation movement to actuate the driven member 610 can be transmitted by the driving member 11 from the handle portion 12 to the driven member 610.

(22) Referring to FIGS. 4 to 8, the seating device 100 further includes a resilient member 3 for urging the driving member 11 to move to the non-operative position. In this embodiment, the resilient member 3 connects between the driving member 11 and the headrest 5, and normally applies a downward urging force to the driving member 11. The resilient member 3 is, but not limited to, a coiled spring that has an end extending into the engaging hole 112 so as to be attached to the driving member 11. Another end of the resilient member 3 is attached to the headrest 5.

(23) As shown in FIGS. 2 and 4, when the driving member 11 is in the non-operative position, the handle portion 12 abuts against the outer surface of the top end 5a of the headrest 5 due to the downward urging force of the resilient member 3. The driving member 11 is inoperative to transmit the actuation movement to the driven member 610 of the adjustment mechanism 6. The driving member 11 is inoperative because the active transmitting parts 1111 of the engaging holes 111 disengage from the respective passive transmitting parts 6140 of the engaging pins 614. As the engaging holes 111 are moved downwardly together with the driving member 11 by the biasing action of the resilient member 3, top sides of the engaging pins 614 respectively engage top sides of the hole boundaries of the engaging holes 111. The top sides of the engaging holes 111 are not active transmitting parts 1111 of the driving member 11, and the top sides of the engaging pins 614 are not passive transmitting parts of the driven member 610. This is because the actuation movement of the handle portion 12 is neither delivered by the driving member 11 at the top sides of the engaging holes 111, nor received by the driven member 610 at the top sides of the engaging pins 614. The actuation movement will cause separation of the top sides of the engaging holes 111 from the top sides of the respective engaging pins 614.

(24) In the operative position, as the handle portion is spaced away from the outer surface of the headrest 5 against the biasing action of the resilient member 3, handling of the handle portion 12 may be facilitated.

(25) For operating the operating unit 1 to adjust the position of the headrest 5 relative to the seat body 4, the handle portion 12 may be pulled upward away from the top end 5a of the headrest 5. In this situation, the driving member 11 is moved upward so that the engaging pins 614 engage the active transmitting parts 1111 of the hole boundaries of the respective engaging holes 111. Upon continued upward pulling of the handle portion 12, the driven member 610 is moved upward by the driving member 11 so that the tooth engaging shaft 6130 of the second locking unit 613 is uninterlocked with the toothed rack of the first locking unit 611 (see FIG. 10). Thus, movement of the headrest 5 relative to the seat body 4 is allowed for height adjustment. As the handle portion 12 is moved upward, the resilient member 3 is tensioned between the driving member 11 and the seat body 4 to store a restoring force. After the height of the headrest 5 relative to the seat body 4 is adjusted, the handle portion 12 may be released so that it is returned to abut against the top end 5a of the headrest 5 by the restoring force of the resilient member 3. Therefore, the handle portion 12 is prevented from being accidentally pulled upward when the driving member 11 is in the non-operative position. Due to the handle portion 12 normally placed in a non-protruding position, the seating device 100 has an improved aesthetic appearance compared to the prior art having protruding operating handles or knobs.

(26) While the engaging holes 111 are provided in the driving member 11 and the engaging pins 614 are provided in the driven member 610 in this embodiment, according to other embodiments, the engaging holes may be provided in the driven member 610, and the engaging pins may be provided in the driving member 11. In this case, the active transmitting part of the driving member 11 is situated at the top side of the engaging pin, and the passive transmitting part of the driven member 610 is situated at the top side of the engaging hole.

(27) In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.

(28) While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment(s) but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.