Passenger seat headrest platform

PRIORITY CLAIM

[0001] This application is a divisional application and therefore claims priority of U.S. patent application Ser. No. 09/989,851, filed Nov. 19, 2001.

FIELD OF THE INVENTION

[0002] This invention relates generally to a headrest and, more particularly, to a passenger seat headrest platform.

BACKGROUND OF THE INVENTION

[0003] In contrast to passengers seated in a first class section of an airplane, train, bus, or other transport vehicles, passengers seated in economy class are more squeezed for space. This results in a more crowded and fatiguing trip for those passengers riding in economy class sections of airplanes, trains, buses, or other transport vehicles. Unlike first class, cramped economy class passengers do not have space to rest their heads in comfort or stretch to relax. Tired passengers in economy class often, sometimes unintentionally, rest their heads on the shoulder of adjacent passengers and fall asleep. A surprise awakening then occurs as the adjacent passenger nudges the sleeping passenger.

[0004] Given these cramped conditions, an economy class passenger can only bend forward to rest his or her head. Food trays, which drop from the back sections of forward seats, are deployed at lap level and are too low for resting one's head. Furthermore, the hard surfaces of food trays makes it difficult to comfortably rest one's head.

[0005] Cramped passengers need a means to sleep or rest in relative comfort while in a sitting position. Such a comfort level would be achieved similarly as when a person sits at a desk, leans forward, and rests his or her head and arms on the desk's surface. Thus, there is an unmet need in the art to provide passengers a similar option that allows them to slightly lean forward, and then place their heads and arms onto a padded rest deployed in a position higher than is possible with drop down, lap-deployed food trays, and at a passenger-selected inclination angle and height.

SUMMARY OF THE INVENTION

[0006] Three embodiments of the invention permit passengers to slightly lean forward and place their heads and arms onto a padded headrest deployed in a position higher than is possible with a drop down, lap-deployed food trays. Two embodiments allow the passenger to use a deployed padded headrest without being affected by the seatback recline adjustments made by a passenger sitting in forward seat. In another embodiment the deployed padded headrest is susceptible to seatback recline interference caused by a passenger seated in forward seat who proceeds to make seatback recline adjustments.

[0007] An embodiment not susceptible to recline interference is the sleep bar. The sleep bar serves as a back-of-the-neck headrest and a forward face-headrest. When in a neutral or undeployed position, the sleep bar is in a stowed position, essentially collinear with and secured into the passengers seat. In the stowed position, the sleep bar serves as a cushioned back-of-the-neck headrest for the passenger.

[0008] The sleep bar is a passenger headrest that is platform deployable and stowable from a passenger seat. The platform operates as a rear headrest and is pivoted to a forward position to serve as a forward leaning face-headrest. The headrest includes a headrest platform that is attached to an adjustable post made of tubular construction and having a plurality of holes. The adjustable post is concentrically dimensioned to be slidably received by a tubular bar. The tubular bar has a set of holes and is pivotably attached to the passenger seat. A first connector secures the adjustable post and tubular bar to each other. The headrest is pivotable through a range of motion adjusted by a passenger, wherein the passenger selects an inclination angle. The inclination angle used by the passenger is established via a second connector that secures the tubular bar to the seat.

[0009] When the sleep bar is moved forward from its stowed undeployed position, it can be pivoted to a comfortable inclination angle and elevation adjusted to the preferred height as desired by the passenger. It is then secured by various locking connectors (to secure the adjusted height) or clamping connectors (to secure the adjusted inclination angle) by the passenger to establish the passenger's preferred deployed position for the headrest platform. In the deployed position, the passenger slightly leans forward and rests his or her forehead or side of the head on the cushioned sleep bar headrest platform.

[0010] The cushioned sleep bar platform offers several advantages. It is integral to the passenger's seat and its stowed and deployed position is controlled specifically by the passenger. The passenger has the option to convert the sleep bar's back-of-the-neck headrest function to a forehead headrest function simply by deploying the sleep bar to a forward angle-adjusted and height-adjusted position. The cushioned sleep bar's inclination angle position is not affected by nearby forward sitting passengers as it is deployed from the seat of a sitting passenger who makes the inclination angle and height adjustments.

[0011] Another embodiment of the invention not susceptible to seatback recline interference is a single-toggle padded food tray which is deployed from the seatback of a forward sitting passenger. The single-toggle padded food tray provides two functions. One function is to provide a hard food-serving surface deployed at lap-level, the other function is to provide a forward face-padded headrest deployed at a passenger selected height and inclination angle similar in function to the sleep bar. The single-toggle padded food tray, though deployed from the rear seatback of a forward sitting passenger seat, is not affected by seatback recline interference because it pivots from a stationary section of the forward sitting passenger seat.

[0012] An embodiment that is susceptible to seatback recline interference is a dual-toggle padded food tray that is also deployed from the moveable seatback of a forward passenger seat. As with the single-toggle invention, the dual-toggle invention also provides a lap-level food-serving surface and a forward leaning chest-to-head level padded surface for face resting. Because the dual-toggle embodiment deploys from the non-stationary forward seatback, it is susceptible to seatback recline interference. The height and inclination angle selected by the passenger will vary slightly with the seat recline adjustments made by the forward seated passenger. Nevertheless, the dual-toggle invention offers many of the same advantages as the single-toggle invention and the sleep bar invention that are not susceptible to seatback recline interference. In the deployed position the dual-toggle provides a cushioned head-resting surface that can be initially adjusted to a passenger-preferred angle of inclination and height, and also provides a lap-level hard food-serving surface.

[0013] As will be readily appreciated from the foregoing summary, all embodiments of the invention provide a forward head-resting surface that can be adjusted to a passenger preferred height and inclination angle. Embodiments of the invention are readily ascertained from the following drawings and detailed descriptions.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The preferred and alternative embodiments of the present invention are described in detail below with reference to the following drawings.

[0015]FIG. 1A is a side view of a passenger seat with sleep bar deployed in the forward face resting position with the sleep bar surface unfolded in a secured position;

[0016]FIG. 1B is a top view of passenger seat with sleep bar deployed in the forward face resting position with the sleep bar surface unfolded in a secured position;

[0017]FIG. 2A is a front view of passenger seat with sleep bar in stowed and folded closed position for back-of-the-neck or rear head resting position;

[0018]FIG. 2B is a side view of the passenger seat showing the folded sleep bar in the stowed (rear headrest) and deployed (face headrest) position;

[0019]FIG. 3 is a rear view of the passenger seat with sleep bar in the stowed and folded position;

[0020]FIG. 4A is a sleep bar assembly in folded rear headrest position;

[0021]FIG. 4B is a sleep bar height positioning locking mechanism;

[0022]FIG. 5 is an underside of sleep bar headrest platform in the open and locked position;

[0023] FIGS. <b>6</b>A-D depict the operation of the single-toggle padded food tray;

[0024]FIG. 6A is an angled view of the stowed, single-toggle padded food tray with padded surface facing outward;

[0025]FIG. 6B is the deployed single-toggle padded food tray with hard surface facing up;

[0026]FIG. 6C depicts the lateral movement of the single-toggle padded food tray with hard surface face up, horizontal and lap-level;

[0027]FIG. 6D depicts pivotal movement of single-toggle padded food tray with padded surface pivoted into the top position;

[0028]FIG. 6E is the single-toggle padded food tray with the padded surface in the face up position being positioned for face head resting as selected by the passenger;

[0029]FIG. 7A is a side view that more closely shows the single-toggle padded food tray subjected to lateral movement;

[0030]FIG. 7B is a side view that more closely shows the single-toggle padded food tray subjected to pivotal movement;

[0031]FIGS. 8A, 8B, and <b>8</b>C depicts the mechanical positioning of the extended bar stop into the single-toggle padded food tray slide cavity;

[0032]FIG. 9 depicts the tray arm to tray leg assembly which prevents forward sitting passenger recline tilt interference;

[0033]FIG. 10A displays the angular device positioning mechanism of the single-toggle padded food tray;

[0034]FIG. 10B depicts a magnified portion of the angular device positioning mechanism;

[0035]FIG. 11 shows the dual-toggle padded food tray in a stowed position in the seatback of tiltable seat;

[0036]FIG. 12 displays dual-toggle padded food tray in a lap level horizontal position showing the lateral movement of the tray;

[0037]FIG. 13 depicts an exploded view of the dual-toggle padded food tray in relation to seatback;

[0038]FIG. 14 more details of the internal structures of the comfort pad secured to the vertically stowed food tray; and

[0039]FIGS. 15A, 15B, and <b>15</b>C depicts the deployment of the comfort pad of the dual-toggle padded food tray assembly.

DETAILED DESCRIPTION OF THE INVENTION

[0040] An embodiment free of forward seated passenger recline interference is shown in FIGS. 1A and 1B. A sleep bar <b>10</b> serves as a rearward and face-ward padded headrest. Operational utility of the sleep bar <b>10</b> is depicted in FIG. 1A. Here a sleeping passenger in passenger seat <b>12</b> is able to sleep in a forward headresting position A-A on a deployed sleep bar platform <b>14</b>. The position of the sleep bar <b>10</b> is totally under control by the passenger. Extension or height is controlled by adjustable post <b>16</b> that slides along inner post <b>17</b>. The angle of the sleep bar is adjusted through a pivoting point <b>18</b>. FIG. 1B shows the top view of the operational utility of the sleep bar. Here the passenger is resting on the sleep bar platform <b>14</b> that is deployed in a forward head resting position A-A and held in position by adjustable post <b>16</b> and a clamping means near point <b>18</b>. The plurality of configurations for the sleep bar <b>10</b> is depicted in FIGS. 2A and 2B.

[0041]FIG. 2A shows a view of the passenger seat <b>12</b> with the stowed sleep bar <b>10</b>. Headrest <b>22</b> is on the top of the passenger seat <b>12</b>. The folded headrest platform <b>22</b> is stowed in a vertical position parallel to the spine of the passenger seat <b>12</b>. The folded headrest platform <b>22</b> is supported by adjustable post <b>16</b> secured by a locking means to inner post <b>17</b>. The inner post <b>17</b> resides aft to armrest <b>24</b>. FIG. 2B is a side view that represents possible configurations, angles, and adjustment extensions or heights from the folded stowed position <b>22</b> to the deployed position <b>14</b> depicted inside armrest <b>24</b>. The folded platform <b>22</b> is in pillow configuration to the passenger seat <b>12</b>. Vertical headrest <b>22</b> is attached to adjustable post <b>16</b> that is secured to inner bar <b>17</b>. The forward angle of the sleep bar <b>10</b> is controlled through pivot point <b>18</b> in which the vertical sleep bar <b>10</b> is unfolded at position <b>14</b> in the forward position to any angle preferred by the seated passenger.

[0042] The relation of the folded sleep bar <b>10</b> to other components of the seat <b>12</b> is described in rear view FIG. 3. A conventional food tray <b>32</b> with leg supports <b>34</b> is shown in a stowed position. Here the folded headrest platform <b>22</b> rests on top of the passenger seat <b>12</b> secured by adjustable post <b>16</b>. Inner bar <b>17</b> is internal to armrest <b>24</b> and is turned along pivoting axis <b>36</b>.

[0043] Adjustment of height of the sleep bar is shown in FIG. 4A. In adjustable post <b>16</b> resides a plurality of positioning holes <b>42</b> which are linearly aligned. Similarly, there resides near the upper end on inner bar <b>17</b> a securing hole <b>45</b>. As adjustable post <b>16</b> slides along inner post <b>17</b> the bar height is locked into position as the positioning holes <b>42</b> of adjustable post <b>16</b> aligns with components of a positioning post locking mechanism (not shown), near view line B-B, and the upper end hole of inner bar <b>17</b>. Inner bar <b>17</b> has a pivot hole <b>46</b> wherein inner bar <b>17</b> is secured to the passenger seat via a bolt or equivalent connector.

[0044]FIG. 4B is a cross-sectional view of axial view B-B showing a depiction of the positioning post locking mechanism <b>49</b>. The extension or height of the sleep bar <b>10</b> is affected as the hollow adjustable post <b>16</b> is slid along hollow, inner post <b>17</b>, causing an alignment of positioning holes <b>42</b> with securing hole <b>45</b>. When this alignment occurs, a spring-loaded cylinder <b>47</b> pushes a positioning peg <b>48</b> through the aligned securing hole of inner bar <b>17</b> and positioning hole <b>42</b> of outer positioning post <b>16</b>. The positioning peg <b>48</b> is flanged to prevent its expulsion from the positioning post locking mechanism <b>49</b>. Once the sleep bar <b>10</b> is adjusted to a passenger-preferred height, it is pivoted into an angled position for forward sleeping.

[0045]FIG. 5 shows how the sleep bar <b>10</b> is unfolded. Along pivoting access <b>52</b> the two halves of the platform pads <b>55</b> are opened and reveal two hidden positioning switches, <b>56</b> and <b>57</b>, which are used to secure the two padded halves <b>55</b> into a locked open and unfolded position. Positioning switches <b>56</b> and <b>57</b> are pivoted into an engaged position <b>58</b> and <b>59</b>. Positioning switch <b>56</b> rotates in recess <b>53</b> and positioning switch <b>59</b> rotates in recess <b>54</b>. The unfolded deployed sleep bar <b>10</b> is shown attached to positioning post <b>16</b>.

[0046] Another embodiment of the invention independent of forward passenger recline interference is the single-toggle padded food tray <b>62</b> which contains a hard food-serving surface and a padded, pillow like surface <b>66</b>. The single toggle padded food tray is secured into a recess of a seatback with a toggle latch <b>61</b> engaged against a catch of the food tray. The toggle latch <b>61</b> can be rotated to engage or disengage the catch of the food tray. As shown in FIG. 6A, seat <b>60</b> contains a stowed single-toggle padded food tray <b>62</b> secured by a toggle <b>61</b> and tray legs <b>63</b>. As shown, the padded surface <b>66</b> is stowed vertically, secured by toggle <b>61</b> engaged against the food tray latch (not shown). As toggle <b>61</b> is rotated as indicated in FIG. 6B, a conventional food tray is pivoted about tray legs <b>63</b> downward to lap level with the hard surface <b>64</b> face up in a deployed position. In side view FIG. 6C, the hard surface <b>64</b> is face up and the padded surface <b>66</b> is face down. As lateral motion is applied to the single-toggle padded food tray <b>62</b> towards the passenger, tray arm <b>67</b> is partially revealed. Then, as depicted in FIG. 6D, the single-toggle padded food tray is rotated until it reaches a tray stop. Padded surface <b>66</b> is now in an angled and upwardly deployed position for use by the passenger. Finally, as depicted in FIG. 6E, the passenger preferred angle of rotation for using the single-toggle padded food tray <b>62</b> is then secured with the padded surface <b>66</b> face up. The tray <b>62</b> latch <b>65</b> displaced from toggle <b>61</b>.

[0047]FIGS. 7A and 7B depict how the single-toggle padded food tray <b>62</b> is subjected to horizontal and pivotal motion. In FIG. 7A, depressing catch <b>71</b> allows passenger to extend lateral movement of tray <b>62</b>, revealing tray arm <b>67</b>. The single-toggle padded food tray <b>62</b> is pulled toward the passenger along tray arm <b>67</b> that is attached to tray legs <b>63</b> via the tray arm pivots <b>70</b>. As the passenger continues to pull the single-toggle padded food tray closer to the passenger as shown in FIG. 7B, tray forearms <b>73</b> are partially revealed. The remainders of the tray forearms <b>73</b> are still inside the single-toggle padded food tray slide cavity as indicated by the dashed lines. The passenger is then able to pivot the single-toggle padded food tray <b>62</b> about the forearm pivot <b>72</b> attached to tray arm <b>67</b>, which is in turn connected to the tray legs <b>63</b> via the tray arm pivots <b>70</b>. The pivotal rotation continues until the beveled tray stop surface <b>74</b> of the tray forearm <b>73</b> engages against the upper ridge of tray arm <b>67</b>, located above latch <b>71</b>.

[0048]FIGS. 8A, 8B, and <b>8</b>C describe the mechanical relationship of how the extended bar stop <b>81</b> fits into the single-toggle padded food tray slide cavity. In FIG. 8A, the extended bar stop <b>81</b> includes the tray arm <b>67</b> in linear alignment with the tray forearm <b>74</b> connected via the forearm pivot <b>72</b>. On the tray forearm <b>73</b> resides a tray catch <b>82</b>. In FIG. 8B, the extended bar stop <b>81</b> is then inserted into the single toggle padded food tray's <b>62</b> tray slide cavity <b>86</b> whereupon the tray catch <b>82</b> engages into cavity clip <b>84</b>. Padded surface <b>66</b> is shown face down. FIG. 8C shows a partial cross-sectional view of the single-toggle padded food tray <b>62</b> wherein the tray slide cavity <b>86</b> contains the cavity clip <b>84</b> located on the side of the slide cavity <b>86</b> which is in turn interior to the food service tray <b>62</b>. The cushioned comfort pad <b>66</b> is shown facing downward.

[0049]FIG. 9 depicts how the tray arm to tray leg assembly is prevented from forward sitting passenger recline tilt interference. To the tray leg <b>63</b> is attached the tray arm <b>67</b> which has an arm follower pin <b>90</b> which slides within pin slot cavity <b>91</b>. Tray arm <b>67</b> is secured to the companion tray arm via an interconnecting tie rod <b>94</b> that is secured to the tray arm <b>67</b> with a tie rod securing screw <b>95</b> engaged at each end of the tie rod <b>94</b> inserted through each companion tray arm <b>67</b>. Tray legs <b>67</b> are distally connected to bottom of forward passenger seat separated from the tilting seatback. The pivotal motion of tray arm <b>67</b> about the tray leg <b>63</b> occurs when following pin <b>90</b> slides within pin slot cavity <b>91</b> as the tray arm <b>67</b> is pivoted about tray arm pivot <b>70</b>.

[0050]FIGS. 10A and 10B displays the angular device positioning mechanism <b>99</b> of the single-toggle padded food tray. FIG. 10A depicts the arrangements of parts of the complete positioning mechanism <b>99</b> wherein ray arm <b>67</b> with latch <b>82</b> is shown articulated to tray forearm <b>73</b> via forearm pivot <b>72</b>. On tray forearm <b>73</b> is tray catch <b>62</b>. As shown in FIG. 10B, the pivotal motion of tray forearm <b>73</b> is stopped as the beveled tray stop surface <b>74</b> engages against the upper ridge of tray arm <b>67</b>.

[0051] Another embodiment similar to the single-toggle padded food tray is the dual-toggle padded food tray. The dual-toggle padded food tray is similarly a comfort padded food tray and food tray assembly, which is attached to the forward passenger seatback via a tray leg pivot. Though the dual-toggle padded food tray offers similar service tray and sleeping surface functionality, because it is pivotally deployed directly from the forward sitting passenger seatback, the dual-toggle padded food tray is subject to recline tilt interference.

[0052]FIG. 11 shows the dual-toggle padded food tray <b>114</b> in a stowed position in the seatback of forward sitting passenger seat <b>110</b> where the padded surface <b>116</b> is facing outward. In the stowed position are visible two toggle latches. The upper toggle latch is the food tray toggle latch <b>112</b> secured by food tray toggle catch <b>113</b> and the lower toggle latch is the comfort pad toggle latch <b>118</b> secured by catch <b>124</b>. Dual-toggle padded food tray <b>114</b> is secured by pivoting about tray legs <b>120</b>.

[0053] In FIG. 12, the food service tray <b>114</b> from seatback <b>110</b> is shown in a deployed position through pivots. As toggle latch <b>112</b> is pivoted clear from catch <b>113</b>, the food service tray <b>114</b> falls with gravity to lap level as it pivots through tray pivots <b>128</b> securing tray bayonets <b>122</b> to tray legs <b>120</b>. Tray legs <b>120</b> are attached to tiltable seatback <b>110</b> via seatback and tray leg pivots <b>111</b>.

[0054]FIG. 13 depicts an exploded view of the dual-toggle padded food tray <b>114</b> in seatback <b>110</b>. Internal structures include slots <b>132</b>, hinge <b>134</b>, and pivot link <b>136</b>. Toggles <b>112</b> and <b>118</b> are shown in an engaged vertical position. Dual-toggle padded food tray <b>114</b> is shown directly projecting from tray bayonets <b>122</b>, which in turn are connected to tray legs <b>120</b>. Padded surface <b>116</b> contains two spring-loaded slide pins <b>130</b>, located at the top end of padded comfort rest <b>116</b>.

[0055]FIG. 14 depicts more details of the internal structures of the padded surface <b>116</b> wherein two spring-loaded pins <b>130</b> are shown for reference. The planar design of the pivot link <b>136</b> imparts stability to the padded-surface when deployed to prevent wobbling and is secured to the internal side via a comfort pad hinge <b>140</b>.

[0056]FIGS. 15A, 15B, and <b>15</b>C depict the deployment of the outward facing comfort pad of the dual-toggle padded food tray <b>114</b> from seatback <b>110</b> to a passenger use position. In a side view shown in FIG. 15A, the dual-toggle padded food tray <b>114</b> is stowed into seatback <b>110</b> with padded surface <b>116</b> facing outward towards the passenger. As shown in side view of FIG. 15B, as lower toggle latch <b>118</b> is rotated, the comfort pad <b>116</b> falls downward with gravity with the spring-loaded pivots <b>130</b> sliding in slots <b>132</b>. The angled comfort pad <b>116</b> is then secured via the pivot link <b>136</b>. Pivot link <b>136</b> is shown secured to tray <b>114</b> with padded surface <b>116</b> angled face up. FIG. 15C shows an angular view where the comfort pad is secured in a face-resting position from seatback <b>110</b>.

[0057] While the preferred embodiments of the invention has been illustrated and described, as noted above, many changes can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is not limited by the disclosure of the preferred embodiment. Instead, the invention should be determined entirely by reference to the claims that follow.