Patent Description:
In embodiments, a computing device includes a first portion (e.g., a display) and a second portion (e.g., a second display or keyboard). A hinge (i.e., a rotating and translating hinge) connects the first portion to the second portion. In some embodiments, bumpers (e.g., grommets) including an impact resistant member are affixed to the first and/or second portions near the hinge to absorb any impact between the portion(s) and the hinge. One or more of the bumpers extends beyond a height of the corresponding portion so as to act as a foot for the device, such that the member, rather than the portion, contacts a resting surface. In some embodiments, a bumper is affixed to the hinge (e.g., in lieu of affixing a bumper to the first or section portion). In some embodiments, in an overextended position, the hinge is prevented from contacting the first or second portion by the corresponding bumper.

Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of such embodiments. The features and advantages of such embodiments may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features will become more fully apparent from the following description and appended claims, or may be learned by the practice of such embodiments as set forth hereinafter.

In order to describe the manner in which the above-recited and other features of the invention can be obtained, a more particular description will be rendered by reference to specific implementations thereof which are illustrated in the appended drawings. For better understanding, the like elements have been designated by like reference numbers throughout the various accompanying figures. While some of the drawings may be schematic or exaggerated representations of concepts, at least some of the drawings may be drawn to scale. Understanding that the drawings depict some example implementations, the implementations will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:.

This disclosure generally relates to devices, systems, and methods to protect fragile elements of a computing device. <FIG> is a perspective view of a representation of a computing device <NUM>, according to at least one embodiment of the present disclosure. The computing device <NUM> includes a first portion <NUM> and a second portion <NUM>. The first portion <NUM> is rotatable relative to the second portion <NUM> about at least one hinge <NUM>. In the embodiment shown in <FIG>, the first portion <NUM> rotates relative to the second portion <NUM> about two hinges <NUM>. However, it should be understood that the computing device may include more or less hinges than two. For example, the computing device may include one, two, three, four, five, six, seven, eight, nine, ten, or more hinges. The number of hinges <NUM> may depend on various factors, such as the weight of the first portion <NUM>, the weight of the second portion <NUM>, the difference in weight between the first portion <NUM> and the second portion <NUM>, the desired resistance to rotation, the length of the computing device <NUM>, the width of the computing device <NUM>, the thickness of the computing device <NUM>, any other factor, and combinations thereof.

In some embodiments, the first portion <NUM> and/or the second portion <NUM> may include one or more of glass covers, plastic covers, displays, ceramic plates, aluminum plates, magnesium plates, any other plate, material, or cover, and combinations thereof. For the purposes of this disclosure, unless otherwise stated, a discussion of parts, elements, and relationships with respect to the first portion <NUM> may be applied in a similar fashion to the second portion <NUM> in addition to the first portion <NUM> or as an alternative to the first portion <NUM>. The hinge <NUM> may be made from a steel alloy, aluminum, plastic, or other material.

In the embodiment shown, the hinges <NUM> both rotate and translate relative to the first portion <NUM> and the second portion <NUM>. A rotating and a translating hinge may facilitate an increased range of motion between the first portion <NUM> and the second portion <NUM>. For example, the first portion <NUM> includes a first top side <NUM>-<NUM> and a first bottom side <NUM>-<NUM>, and the second portion <NUM> includes a second top side <NUM>-<NUM> and a second bottom side <NUM>-<NUM>. In a first closed position, the first bottom side <NUM>-<NUM> may be in close proximity with (e.g., parallel),and optionally in contact with, the second bottom side <NUM>-<NUM>, and in a second closed position the first top side <NUM>-<NUM> may be in close proximity with (and optionally contact) the second top side <NUM>-<NUM>.

In some embodiments, the first portion <NUM> and/or the second portion <NUM> may be more fragile and/or brittle than the hinge <NUM>. Thus, if the hinge <NUM> contacts and/or bumps the first portion <NUM> or the second portion <NUM>, the portion may break, crack, or deform. This may reduce functionality of the computing device <NUM> by interfering with the view of a display, interfering with the sensitivity of a touch screen display, causing the first portion to separate from the hinge, cause some other reduction in functionality, and combinations of the foregoing. Furthermore, a broken or cracked first portion may be aesthetically unappealing or even dangerous to the user.

<FIG> is a top-down view of the hinge <NUM> of <FIG> in an open position. The hinge <NUM> connects the first portion <NUM> to the second portion <NUM>. A bumper <NUM> (e.g., a grommet) is located between the first portion <NUM> and the body <NUM> of the hinge <NUM>. The bumper <NUM> is made from an impact resistant material (e.g., rubber or silicone). Thus, if the body <NUM> of the hinge <NUM> contacts the bumper <NUM> (e.g., by an overextension of the hinge <NUM>), the bumper <NUM> will absorb some or all of the energy from the impact. This may help to protect the relatively more fragile material of the first portion <NUM> from being damaged.

The first portion <NUM> includes a profile <NUM> of the first portion <NUM>. The profile <NUM> is a cut-out in the first-portion <NUM> to make room for the hinge body <NUM>. In the embodiment shown, the profile <NUM> includes a length section <NUM>, a width section <NUM>, and a curved section <NUM>. The length section <NUM> is straight and parallel to a length of the body <NUM>. The width section <NUM> is straight and parallel to a width of the body <NUM>. The curved section <NUM> is curved and located between the length section <NUM> and the width section <NUM>. In other embodiments, the profile <NUM> may be a different shape, e.g., the cut-out may have a corner with no curved section <NUM>, or may be curved with no straight sections.

The bumper <NUM> is located away from the body <NUM> of the hinge <NUM> with a rotational offset <NUM> and a width offset <NUM>. The rotational offset <NUM> provides room for the first portion <NUM> and the body <NUM> to rotate relative to each other. Furthermore, the rotational offset <NUM> is sufficient that the hinge does not damage the first portion <NUM> and/or contact the bumper <NUM> when the hinge <NUM> is closed. In some embodiments, the rotational offset <NUM> may be in a range having an upper value, a lower value, or upper and lower values including any of <NUM>, <NUM>, <NUM>. <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or any value therebetween. For example, the rotational offset <NUM> may be greater than <NUM>. In another example, the rotational offset <NUM> may be less than <NUM>. In yet other examples, the rotational offset <NUM> may be any value in a range between <NUM> and <NUM>. In some embodiments, it may be critical that the rotational offset <NUM> is less than <NUM> to improve the aesthetics of the computing device. In some embodiments, the rotational offset <NUM> may be less than <NUM> or greater than <NUM>.

The width offset <NUM> is the distance from the body <NUM> to the bumper <NUM> perpendicular to the axis of rotation of the hinge <NUM>. The width offset <NUM> may be sized to allow the body <NUM> and the first portion <NUM> to rotate relative to each other without the body <NUM> rubbing against the first portion <NUM>. In some embodiments, the width offset <NUM> may be in a range having an upper value, a lower value, or upper and lower values including any of <NUM>, <NUM>, <NUM>. <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or any value therebetween. For example, the width offset <NUM> may be greater than <NUM>. In another example, the width offset <NUM> may be less than <NUM>. In yet other examples, the width offset <NUM> may be any value in a range between <NUM> and <NUM>. In some embodiments, it may be critical that the width offset <NUM> is less than <NUM> to improve the aesthetics of the computing device. In some embodiments, the width offset <NUM> may be less than <NUM> or greater than <NUM>.

Reducing the offsets <NUM> and <NUM> allows for increased area for the corresponding portions (e.g., additional screen size if the portion is a display portion). Additionally, it may be aesthetically pleasing to reduce rotational offset <NUM> and the width offset <NUM> as much as possible. The rotational offset <NUM> and the width offset are therefore sized to accommodate normal, everyday use without contacting and/or damaging the first portion <NUM>. However, during use, the computing device may be dropped, bumped, jostled, or otherwise subject to a sudden force. This may cause relative movement of the first portion <NUM> and the hinge body <NUM>. If the movement is great enough, then the body <NUM> may move sufficient to contact the first portion <NUM>, potentially causing the first portion <NUM> to crack, deform, and/or break.

Conventionally, to prevent damage, the rotational offset <NUM> and/or the width offset <NUM> is increased. This may reduce the functionality and/or aesthetic appeal of a computing device. By placing the bumper <NUM> between the first portion <NUM> and the body <NUM>, the rotational offset <NUM> and the width offset <NUM> may be reduced, with the bumper <NUM> absorbing at least some of the impact from a sudden force. This helps to protect the first portion <NUM> from cracking and/or breaking.

Furthermore, by placing the bumper <NUM> between the first portion <NUM> and the body <NUM>, the first portion <NUM> may be further offset from the body <NUM>. This may increase the radius of curvature of the curved portion <NUM>. Increasing the radius of curvature of the curved portion may reduce the stress concentrations at the curved portion <NUM>, thereby further protecting the first portion <NUM> from cracking and/or breaking. In some embodiments, the radius of curvature may be in a range having an upper value, a lower value, or upper and lower values including any of <NUM>, <NUM>, <NUM>. <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>,, or any value therebetween. For example, the radius of curvature may be greater than <NUM>. In another example, the radius of curvature may be less than <NUM>. In yet other examples, the radius of curvature may be any value in a range between <NUM> and <NUM>. In some embodiments, it may be critical that the radius of curvature is greater than <NUM> to reduce the stress concentrations and protect the first portion <NUM>. In some embodiments, the radius of curvature may be less than <NUM> or greater than <NUM>.

<FIG> is a side view of the hinge <NUM> of <FIG>. As may be seen, the first portion <NUM> includes a first bumper <NUM>-<NUM> connected to a first upper surface <NUM>-<NUM> and a second bumper <NUM>-<NUM> connected to a first lower surface <NUM>-<NUM>. Similarly, the second portion <NUM> includes a third bumper <NUM>-<NUM> connected to a second upper surface <NUM>-<NUM> and a fourth bumper <NUM>-<NUM> connected to a second lower surface <NUM>-<NUM>. Thus, the first portion <NUM> and the second portion <NUM> may have a bumper between them and the hinge body <NUM> for all directions of rotation. This helps to protect the first portion <NUM> and/or the second portion <NUM> from damage regardless of the position the computing device is in when it is dropped. Moreover, the bumpers may also protect the hinge from deforming or breaking by cushioning the impact between the hinge and the relatively non-deformable portions <NUM> and <NUM>. In some embodiments, each bumper has the same dimensions as each other bumper. In some embodiments, at least one bumper has a distinct shape and/or size as compared to other bumpers. In some embodiments, a subset of the bumpers is sized to act as feet for the device (e.g., to extend beyond a surface of the corresponding portion). Although <FIG> shows the bumpers <NUM> adhered to the portions <NUM> and <NUM>, in other embodiments, one or more of the bumpers are instead adhered to the hinge body <NUM>.

<FIG> is a representation of a bumper assembly <NUM>, according to at least one embodiment of the present disclosure. The bumper assembly <NUM> includes an impact resistant material <NUM> (e.g., a deformable material such as rubber). The impact resistant material <NUM> is bonded to a connecting member <NUM>. The connecting member <NUM> is sized and configured to extend underneath a corresponding surface (e.g., the first upper surface <NUM>-<NUM> or the first lower surface <NUM>-<NUM> of <FIG>) of the first or second portion to connect the impact resistant material <NUM> to the portion. The connecting member <NUM> may be adhered to the first portion using an adhesive layer <NUM>. Connecting the impact resistant material <NUM> to the first portion using a connecting member <NUM> may help to increase the strength of the connection, thereby working to prevent the impact resistant material from breaking or tearing away.

<FIG> is a bottom view of a bumper assembly <NUM>, according to at least one embodiment of the present disclosure. The connecting member <NUM> has a connecting profile <NUM> that runs along the side of the connecting member <NUM> to which the impact resistant material <NUM> is connected. The connecting profile <NUM> includes one or more features <NUM>. The features <NUM> may be cut-outs or protrusions in the connecting profile <NUM> that strengthen the mechanical strength of the connection between the impact resistant material <NUM> and the connecting member <NUM>. In some embodiments, the features <NUM> may include surface features, such as knurling, cross-hatching, and other surface features.

<FIG> is a representation of a cross sectional view of a bumper assembly <NUM>, not forming part of the invention but representing background art that is useful for understanding the invention. In the embodiment shown,
the connecting member <NUM> includes a lip <NUM>. The lip <NUM> is a bend in the connecting member <NUM> that increases the mechanical strength of the connection between the impact resistant material <NUM> and the connecting member <NUM>. As may be seen in <FIG>, the impact resistant material <NUM> is molded to the connecting member <NUM>. For example, the impact resistant material <NUM> may be overmolded (such as through injection molding or another process) over the connecting member <NUM>. This may allow the impact resistant material <NUM> to match to contours of the connecting member <NUM>.

As may also be seen in <FIG>, the impact resistant material <NUM> is secured to the first portion <NUM> through the connecting member <NUM>. The connecting member <NUM> is secured to the first portion <NUM> using an adhesive layer <NUM>. The impact resistant material <NUM> is contacting the first portion <NUM>. The impact resistant material may be adhered to the first portion <NUM>.

<FIG> is a representation of a side view bumper assembly <NUM>, according to at least one embodiment of the present disclosure. In the embodiment shown, the impact resistant material <NUM> (e.g., bumper <NUM>) extends beyond the surface <NUM> of the portion <NUM> (e.g., the first portion <NUM> or the second portion <NUM>). In some embodiments, a first subset of the bumpers <NUM> are sized to extend beyond the corresponding portion surfaces while a second subset of the bumpers are sized to not extend (e.g., be flush with) the corresponding portion surfaces. For example, the bumpers that would contact a resting surface when the device is oriented in a laptop mode would be sized to extend beyond the corresponding surface, while the other bumpers would be not extend beyond their corresponding portion surfaces.

Having the material <NUM> extend beyond the surface of the portion <NUM> may further help to protect the portion <NUM> from cracking, scratching, deforming, and/or breaking. Furthermore, this provides the portion <NUM> with a "foot," or a support on which the computing device may rest when placed down on a support surface so that the surface <NUM> does not contact the support surface. This may help to prevent the surface <NUM> from being scratched, cracked, or broken. In addition, the bumper <NUM> is optionally adapted (e.g., textured and/or sized) to provide a desired coefficient of friction (CoF) between the device and a resting surface. In this way, the bumper <NUM> helps prevent the device from sliding during use and/or when the user is attempting to open the device.

The impact resistant material <NUM> extends an extension height <NUM> beyond the surface <NUM>. In some embodiments, the extension height <NUM> may be in a range having an upper value, a lower value, or upper and lower values including any of <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or any value therebetween. For example, the extension height <NUM> may be greater than <NUM>. In another example, the extension height <NUM> may be less than <NUM>. In yet other examples, the extension height <NUM> may be any value in a range between <NUM> and <NUM>. In some embodiments, it may be critical that the extension height <NUM> is greater than <NUM> to provide protection for the surface <NUM> of the first portion <NUM>. In some embodiments, the impact resistant material <NUM> is sized such that the extension height is greater than a deformation factor for the material so that the corresponding portion does not contact the resting surface even when a user is operating the device and providing a downward force on the device (e.g., due to the user resting their hands the device). In some embodiments, the extension height may be greater than <NUM>.

This disclosure generally relates to devices, systems, and methods to protect elements of a computing device. A computing device includes a first portion and a second portion that are connected by one or more hinges. For example, the first portion and the second portion may include one or more of glass covers, plastic covers, displays, ceramic plates, aluminum plates, magnesium plates, or any other plate, material, or cover. In some embodiments, the hinge may be made from a steel alloy, aluminum, plastic, or other material. For the purposes of this discussion, unless otherwise stated, a discussion of parts, elements, and relationships with respect to the first portion may be applied in a similar fashion to the second portion in addition to the first portion or as an alternative to the first portion.

The one or more hinges may facilitate relative rotation between the first portion and the second portion. The one or more hinges may both rotate and translate relative to the first portion and/or the second portion. A rotating and a translating hinge facilitates an increased range of motion between the first portion and the second portion. For example, the first portion may include a first top side and a first bottom side, and the second portion may include a second top side and a second bottom side. In a first position, the first bottom side may be parallel (and even contact) the second bottom side, and in a second position the first top side may be parallel (and even contact) the second top side.

In some embodiments, the first portion may be more brittle than the hinge. Thus, if the hinge contacts and/or bumps the first portion, the first portion may break or crack. This may reduce functionality of a device by interfering with the view of a display, interfering with the sensitivity of a touch screen display, causing the first portion to separate from the hinge, cause some other reduction in functionality, and combinations of the foregoing. Furthermore, a broken or cracked first portion may be aesthetically unappealing to the user.

In some embodiments, the first portion may have a greater compressive strength than the hinge, which may cause the hinge to bend, crack, or break upon contact with the first portion. This may cause the hinge to malfunction and/or be aesthetically unappealing to the user. In some embodiments, the first portion and/or the second portion may be both more brittle and have a harder compressive strength than the hinge. In this manner, a contact between the first portion and the hinge may damage, crack, break, or bend both the first portion and the hinge.

In some embodiments, an impact resistant member is affixed to the first portion. The impact resistant member may contact the hinge before the hinge contacts the first portion. The impact resistant member may be made from a material that is more resilient and/or have a greater elastic deformity than one or both of the first portion and the hinge. Thus, when the hinge would normally contact the first portion during rotation of the first portion, the hinge may contact the impact resistant layer. Because the impact resistant member has a greater resilience and/or elastic deformity, the impact resistant member may not break upon contact with the hinge. Thus, the impact resistant member may absorb the force of the impact from the hinge, thereby at least partially protecting (e.g., reducing the damage to) both the first portion and the hinge.

In some embodiments, the impact resistant member may be fabricated from a material that has a lower compressive strength than both the first portion and the hinge. For example, the impact resistant member may be fabricated from, rubber, silicone, plastic, TPE, any other material, and combinations thereof.

In some embodiments, the impact resistant member may be attached to a connecting member, and the connecting member may be attached to the first portion. For example, the connecting member may be a hard plate that is adhered to the second side of the first portion with an adhesive layer. The metal plate may extend past an edge of the first portion. The impact resistant member may then be connected to the connecting member.

In some embodiments, the impact resistant member may be overmolded onto the connecting member. In some embodiments, a chemical primer may attached to the connecting member, and the chemical primer may further bond the impact resistant member to the connecting member. Thus, in some embodiments, the impact resistant member and the connecting member may become a single piece. In other words, the impact resistant member may not be removed from the connecting member without damaging or destroying the impact resistant member and/or the connecting member.

In some embodiments, the connecting member may include mechanical interlock features, such as texturing, braiding, profiles, cross-hatching, knurling, other mechanical interlock features, and combinations of the foregoing. In some embodiments, the connecting member may include an edge having an edge profile, the edge profile being non-straight. These mechanical interlock features may increase the strength of the bond between the impact resistant member and the connecting member. In some embodiments, the connecting member may include a lip in the hinge area around which the impact resistant member is attached or molded. This lip may increase the strength of the impact resistant member and the resistance of the impact resistant member to damage and deformation from impact by the hinge.

In some embodiments, the impact resistant member may be attached directly to the first portion. For example, the impact resistant member may be glued or molded onto the first portion. In some embodiments, the first portion may include mechanical interlock features, such as texturing, braiding, profiles, cross-hatching, knurling, other mechanical interlock features, and combinations of the foregoing. In some embodiments, the mechanical interlock features may be included in the first portion during manufacturing. In some embodiments, the mechanical interlock features may be included in the first portion post manufacturing, such as by grinding, milling, laser etching, other methods, and combinations thereof.

In some embodiments, the impact resistant member may be connected directly to the hinge. For example, the impact resistant member may be overmolded onto, or adhered to, an outer circumference of the hinge. In some embodiments, it may be aesthetically preferable to attach the impact resistant member directly to the hinge.

The impact resistant member extends proud above a height of the first portion. In other words, the impact resistant member may extend beyond the first surface of the first portion. In this manner, the impact resistant member may resemble a foot against which the mobile device may rest. This may help to protect the first portion from scratches, cracks, breaks, and other damage caused by a user placing the mobile device on a surface.

In some embodiments, the extension past the first surface may be in a range having an upper value, a lower value, or upper and lower values including any of <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or any value therebetween. For example, the extension may be greater than <NUM>. In another example, the extension may be less than <NUM>. In yet other examples, the extension may be any value in a range between <NUM> and <NUM>. In some embodiments, it may be critical that the extension is greater than <NUM> to properly protect the first surface. In some embodiments, the extension may be greater than <NUM>.

The first portion has a hinge profile, which is the profile of the first portion around the hinge. To prevent the hinge from contacting the first portion during normal operation or when a user drops the computing device, the profile is offset from the range of motion of the hinge with a profile offset. In some embodiments, the impact resistant member may be placed inside the profile offset. In this manner, the impact resistant member may extend from the profile of the first portion to the range of motion of the hinge. This may reduce the visible or spatial gap between the first portion and the hinge, which may be visually appealing to the user.

The profile includes at least one corner having a first portion radius of curvature. In some embodiments, the first portion radius of curvature of the profile may be increased by offsetting the profile from the hinge. This may reduce the stress concentrations on the first portion. This may reduce the likelihood that the first portion may break or crack at the corner. In some embodiments, the first portion radius of curvature may be greater than <NUM>. For example, the radius of curvature may be greater than <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or any value therebetween. In some embodiments, it may be critical that the first portion radius of curvature is greater than <NUM> to reduce the likelihood of the first portion cracking.

In some embodiments, the impact resistant member may follow the profile of the first portion. The impact resistant member may thus have an impact resistant member radius of curvature that is less than the first portion radius of curvature. In some embodiments, the impact radius of curvature may be approximately <NUM>. In other words, the impact resistant member may make one or more sharp turns.

Specific embodiments of the present disclosure are described herein. These described embodiments are examples of the presently disclosed techniques. Additionally, in an effort to provide a concise description of these embodiments, not all features of an actual embodiment may be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous embodiment-specific decisions will be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one embodiment to another.

The articles "a," "an," and "the" are intended to mean that there are one or more of the elements in the preceding descriptions. For example, any element described in relation to an embodiment herein may be combinable with any element of any other embodiment described herein. Numbers, percentages, ratios, or other values stated herein are intended to include that value, and also other values that are "about" or "approximately" the stated value, as would be appreciated by one of ordinary skill in the art encompassed by embodiments of the present disclosure. A stated value should therefore be interpreted broadly enough to encompass values that are at least close enough to the stated value to perform a desired function or achieve a desired result. The stated values include at least the variation to be expected in a suitable manufacturing or production process, and may include values that are within <NUM>%, within <NUM>%, within <NUM>%, or within <NUM>% of a stated value.

A person having ordinary skill in the art should realize in view of the present disclosure that equivalent constructions do not depart from the scope of the present invention as defined by the appended claims, and that various changes, substitutions, and alterations may be made to embodiments disclosed herein without departing from the scope of the present invention as defined by the appended claims.

Claim 1:
A computing device, comprising:
a first portion (<NUM>, <NUM>);
a second portion (<NUM>);
a rotating and translating hinge (<NUM>, <NUM>) connecting the first portion to the second portion;
an impact resistant member (<NUM>, <NUM>, <NUM>, <NUM>) affixed to the first portion (<NUM>), the impact resistant member (<NUM>, <NUM>, <NUM>, <NUM>) extending proud above a height of the first portion (<NUM>, <NUM>);
characterized in that:
the impact resistant member (<NUM>, <NUM>, <NUM>, <NUM>) is located between the rotating and translating hinge (<NUM>) and the first portion (<NUM>) such that the rotating and translating hinge contacts the impact resistant member (<NUM>, <NUM>, <NUM>) in an impact configuration.