KR20150053961A - Protective case and methods of making - Google Patents

Abstract

A protective case for an electronic device is disclosed. The protective case has three layers, an elastomeric liner surrounding a portion of the electronic device, a cover, and a cushion insert disposed between the liner and the cover. The cushion insert includes convex impact portions that extend through the cover and are capable of absorbing shocks from impacts.

Description

[0001] PROTECTIVE CASE AND METHODS OF MAKING [0002]

The present application claims the priority of US application No. 61 / 698,563, filed on September 7, 2012, under co-owned and co-pending U.S. Patent Application No. 61 / 698,563, USC ∬ 119 (e) .

The present invention relates generally to cases designed to protect sensitive items from damage and / or to provide a comfortable, tactile exterior surface.

Currently, many different types of electronic devices exist for communication, entertainment and other purposes. These include, but are not limited to, cellular phones, MP3 players, video players, smart phones, communication devices such as walkie-talks, navigation devices such as GPS devices, and laptop computers, hand- Microprocessor, microprocessor, microprocessor, microprocessor, microprocessor, microprocessor, microprocessor, ultra mobile computer, and tablet computers. These devices often include touch screens; But are not limited to, interactive panels including capacitive coupled interfaces, keyboards, scroll wheels, tilt switches, push button switches; And other interaction controllers.

What is disclosed in one embodiment of the present invention is a protective case. The protective case includes a cover having a back portion and a side wall connected to the back portion. The cover includes interconnecting support members defined by a plurality of receiving apertures disposed in predetermined zones and having a predetermined thickness. The protective case also includes a liner having a back portion and a side wall connected to the back portion thereof. Each of the cover and the liner has a predetermined thickness. The protective case also includes a cushion insert having convex impact areas disposed adjacent to the concave first impact areas. The convex impact zones are disposed in predetermined zones corresponding to the plurality of receiving holes and have a predetermined thickness greater than the thickness of the cover. The cushion insert is disposed between the cover and the liner such that a plurality of interconnected support members engage the concave first impact regions and the convex impact regions engage the plurality of receiving holes such that the convex impact regions extend over the outer surface of the cover do.

BRIEF DESCRIPTION OF THE DRAWINGS Referring now to the drawings, the features and advantages of the present disclosure will become apparent from the following more particular description of illustrative embodiments, in which like reference numerals refer to like parts throughout the different views, Will be. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the disclosure.
Figure 1 is a perspective front view of an exemplary protective case according to the invention in an assembled configuration,
Fig. 2 is a perspective rear view of the cover of the protective case shown in Fig. 1,
Fig. 3 is a side view of the protective case shown in Fig. 1,
Fig. 4 is an exploded perspective view of the protective case shown in Fig. 1,
Fig. 5 is a partial oblique cross-sectional view of the protective case shown in Fig. 1 taken along line 5-5,
Figure 6 is an exploded view of the cross-section shown in Figure 5,
Figure 7a is a cross-sectional view of one embodiment of the cushion insert shown in Figure 4, not to scale;
Figure 7B is a cross-sectional view of another embodiment of the cushion insert shown in Figure 4, not shown in scale,
Figure 8 is a perspective front view of another exemplary protective case according to the present disclosure, of an assembled and configured,
FIG. 9 is a perspective rear view of the protective case shown in FIG. 8,
Fig. 10 is an exploded perspective view of the protective case shown in Fig. 8,
Fig. 11 is an exploded cross-sectional view of the protective case shown in Fig. 8,
Fig. 12 is an exploded perspective view of one section of the protective case shown in Fig. 8,
Fig. 13 is an exploded perspective view of one section of the protective case shown in Fig. 8,
Figure 14 is an exploded perspective view of the two sections shown in Figures 12 and 13, respectively, of the assembled configuration,
Fig. 15 is a cross-sectional view of the screen protector and liner of the protective case shown in Fig. 8,
16 is a cross-sectional view of the assembled configuration of the cover and liner of the protective case shown in Fig. 8,
17 is a cross-sectional view of the protective case shown in Fig. 8,
18 is a front view of another embodiment of the protective case according to the present disclosure,
19 is an internal view of the protective case shown in Fig. 18,
Fig. 20 is a side view of the protective case shown in Fig. 8,
21 is a cross-sectional view of the protective case shown in Fig.

This disclosure relates to shock absorbing and cushioning structures designed to protect sensitive articles from damage. These structures can match the contours of the items to be protected and provide a tactile exterior surface. These structures, in some embodiments, include both convex and stiff impact regions of various shapes, sizes, configurations, and thicknesses. As described below, various materials may be used for convex impact regions.

The improved cases of the present disclosure include interconnected or detachable case sections substantially coinciding with the outer surface of the article to be protected. The case may be designed to have particular functional characteristics such as, for example, targeted shock protection to case edges and corners. By combining special shapes, sizes, configurations, contours, and orientations for the convex and concave impact areas, the case can be adapted to any type of product requiring protection in addition to those mentioned above.

For example, the cases may be adapted to the inside of the sleeves or cases corresponding to the shape and size of the electronic device, such as a laptop computer or tablet device, such that the electronic devices coincide with the exterior of the case. As such, the case may be formed in shapes that will at least partially coincide with the exterior surface of the article placed in the case. The cases described in the present invention may also be adapted for use with hydrates, sports protective equipment, and the like.

Protective cases provide a lightweight, flexible impact resistance protection and are aesthetically satisfactory, provide greater durability and can be manufactured at lower cost than other cases. For ease of discussion, the term "flexible " as used in the present invention means the ability of the pad to be moved by bending, twisting, bending and / or stretching. The assemblies of these cases are robust and durable and can withstand the temperatures, detergents, and mechanical action used in such environments, which, unlike other cases, can degrade under harsh conditions, such as industrial and / or commercial laundry environments.

Figures 1-7 together illustrate one exemplary embodiment of the present disclosure, with respect to a protective case 10 for an electronic device (not shown) such as a media device or a cellular phone. Although described in the present invention with reference to a protective case for an electronic device, as mentioned above, the protective case may be adapted to any product that is designed to provide protection or to provide protection. For ease of reference, the electronic device in all of the embodiments disclosed herein will hereinafter refer to the cell phone.

The case 10 is shown in an assembled configuration in Fig. 1 and in an exploded view in Fig. As shown, the case 10 includes a cover 12, a cushion insert 30, and a liner 40, which may be interconnected during assembly as shown in FIG. 1, As shown in FIG. In this embodiment, the cover 12, the cushion insert 30 and the liner 40 may each be a single integral part or, preferably, two or more parts, each of which may be assembled together and / Can be formed as detachable but intermeshing parts.

The cover 12 may be configured to conform to the outer surface of at least a portion of the cushion insert 30. The cover 12 includes a back section 14 and side walls 16 extending upwardly from the back section 14 thereof. The back section 14 and side wall 16 each include opposing inner surfaces 14a and 16a and outer surfaces 14b and 16b, respectively.

One or both of the backside section 14 and the side wall 16 includes a plurality of receiving apertures 22 extending from the inner surfaces 14a and 16a to the outer surfaces 14b and 16b, And a plurality of mutually connected support members 24 disposed between the first and second support members.

The cover 12 can be formed of a substantially rigid, semi-rigid and / or flexible material and has a size and configuration corresponding to the cellular phone. It may be desirable for the cover 12 to include two or more detachable or interlocking parts that can be assembled on the front and rear surfaces of the cell phone when it is rigid or semi-rigid. The cover 12 is formed from a material that is sufficiently stretchable to allow the electronic device to slide inside the front opening 20 of the cover 12 while maintaining the form- . Suitable materials include, but are not limited to, various thermosetting materials such as synthetic rubber, silicone, urethane and other materials. The preforming of the cover 12 for fitting to the shape of the electronic device as well as the density and resilience of the cover 12 allows the material of the cover 12 to be stretched and restored so that the cushion cover fits snugly in the electronic device . In this embodiment, the cover 12 is an integral, preformed, resilient material that can be stretched and flexed sufficiently to allow the electronic device to easily slide into the case 10 and be removed from the case. The cover 12 is stretched across the electronics and has a resiliency sufficient to allow the cover to be restored throughout the cushion insert and into the electronic device so that the casing 10 is aligned with the electronic device. The cover 12 may be formed using a variety of techniques and processes well known in the art, suitable for processing the aforementioned materials.

In this embodiment, the cover 12 has a predetermined thickness T ₁ selected to be smaller than the thickest thickness T ₂ of the cushion insert, as described below. In this embodiment, the thickness T ₁ ranges from about 0.050 "to about 0.090", preferably from about 0.060 "to about 0.080", more preferably 0.075 ".

The liner 40 may be configured to conform to the inner surface of the cover 12 and at least a portion of the cushion insert 30. The liner includes a back section 44, a side wall 46 extending upwardly from the back section 44, and a bezel 48 extending outwardly from the side wall 46 to define a front opening 20 .

The liner 40 can be formed of a substantially flexible material and has a size and configuration corresponding to the cell phone. The liner 40 can cover the cover 12 if the material can be stretched sufficiently to maintain the pre-formed shape of the liner 40 and at the same time the electronic device slides into the front opening 20 of the liner 40. [ May be formed of any of the materials described above with reference to FIG. In the present embodiment, the liner 40 is integral and has a flexible, flexible shape that allows the electronic device to be easily retracted into and removed from the liner 40, And may include elastomeric materials as described. The liner 40 and hence the case 10 are coincident with the electronic device by having the liner 40 stretch across the electronic device and have sufficient resilience to allow the cover to be restored to fit over the cushion insert. The preforming of the liner 40 to fit into the shape of the electronic device as well as the density and elasticity of the liner 40 allows the material of the liner 12 to be stretched and restored so that the cushion cover fits snugly in the electronic device . The liner 40 may be formed using a variety of techniques and processes suitable for processing the above-described materials, known in the art.

The cushion insert 30 may be configured to conform to at least a portion of the outer surface of the liner. The cushion insert 30 has a size and configuration corresponding to a portion of the inner surface of the cover and a portion of the outer surface of the liner and a thickness to allow fitting between the inner surface of the cover and the outer surface of the insert 40 And may be formed of various materials.

Figure 7 shows an exemplary embodiment of a cushion insert 30 including a plurality of convex impact zones 32 disposed adjacent to spaced apart top and bottom surfaces 30a and 30b and concave first impact zones 34 / RTI > The convex impact zones 32 are defined within the upper surface 30a and extend upwardly from the upper surface and are disposed in predetermined zones corresponding to the plurality of receiving apertures 22 and have a width W _{1 which} is greater than the thickness T ₁ of the cover 12 and the predetermined thickness T ₂ . In this embodiment, the width W ₁ of the convex impact zones 32 is about 0.200 "to about 0.400", preferably about 0.250 "to 0.350", more preferably about 0.305 ", and the thickness T ₂ is about 0.150 "to about 0.350 ", preferably about 0.200" to about 0.300 "and more preferably about 0.240 ".

The convex impact zones 32 are spaced apart from each other by the concave first impact zones 34. The concave first impact regions 34 have a predetermined thickness T _{3 that} is selected to be less than the width W ₂ that can be changed as desired and the thickness T ₂ of the convex impact region 32. In this embodiment, the first width of the concave impact area (34) (W ₂₎ is about 0.100 "to about .200", preferably about .130 "to about 0.170", more preferably between about 0.150 "and a thickness (T ₃₎ Is in the range of about 0.025 "to about 0.045", preferably about 0.030 "to about 0.040", more preferably about 0.035 ".

The cushion insert 30 may also include other features such as shapes, edges, and / or shapes of the cellular phone to facilitate bending and / or bending of the cushion insert 30 within the contours, edges and / Or one or more concave second impact regions (not shown) corresponding to the corners. In this embodiment, the concave second impingement areas 36 have a predetermined thickness T ₄ (for example, less than the predetermined thickness T ₃ ) which is selected to be less than the width W ₃ which can be changed as desired and the thickness T ₃ of the concave first impact area 36 ). In this embodiment, the second width of the concave impact area (36) (W ₃₎ is about 0.080 "to about .200", preferably about .100 "to about 0.170", more preferably between about 0.132 "and a thickness (T ₃₎ Is in the range of about 0.010 "to about 0.030", preferably about 0.015 "to about 0.025", more preferably about 0.020 ". During assembly, the convex impact areas 32 protrude or extend above the outer surface of the cushion insert 30 by a distance D ₁ , as shown in FIG.

Both of the thicknesses, widths, distances and intervals described above can be changed as desired.

In this embodiment, the convex struck areas 32 include an upper surface 32a and side walls 32b extending downward from the upper surface. The convex impact zones 32 may have any thickness sufficient to provide protection or convenient effects by protruding over the outer surface of the cover 12. [ Thus, for any functional advantage, the thickness of the convex struck areas 32 may be designed to protrude above the outer surface in the case of an assembled configuration. For example, when assembled in this exemplary handset case 10, the convex impact areas 32 protrude or extend above the outer surface 12a of the cover 12 by about 1/16 to about 1/2 inch . If desired or necessary, the cushion insert 30, as shown in this embodiment, also includes convex impact areas 32 designed to protrude through the side wall or bezel to protect the edges and / or the screen from impact can do.

The convex impact zones 32 may have any shape or configuration as desired to achieve a functional advantage for shock protection or an aesthetic design intended to appeal to the consumer. The size, shape, quality, configuration, and position of the convex impact regions can be varied as desired to achieve the above objects. For aesthetic purposes, the colors of the cover and cushion insert may be the same or different, and may also include letters and / or figures.

Each cover 12, liner 40 and insert 30 may be provided with a smaller functional key (e.g., a key, etc.) that may limit access due to the thickness of the case so that the user can maintain functional access without removing the case from the electronic device size, and location of the keys, or ports (also not illustrated in the present invention), for the size, shape, and location of the keys. Examples of such smaller functional keys include, but are not limited to, a power key and a volume key. The convex keys 28 should not be confused with the convex impact areas 32 intended to absorb the impact.

Similarly, each cover 12, liner 40, and insert 30 can be configured to interfere with various functional keys, ports, devices, or other items that may be included in an electronic device (none of which are illustrated in the present invention) Shape and position of the article, one or more functional holes 26 or holes to which the shape, size, and location correspond, such as for the size, shape, and location of such articles. Examples of such functional keys include, but are not limited to, charging ports, speakers, auxiliary ports, power keys, camera lenses, and the like.

The cushion insert 30 may also include one or more recessed second impact regions or one or more of the recessed second impact regions < RTI ID = 0.0 > (Not shown).

In order to assemble the case, the cushion insert 30 is configured such that the convex impact zones 32 are received in the corresponding receiving holes 22 and at least partially extend through the receiving holes, The convex impact area 32 can be inserted into the cover 12 so as to be aligned with the receiving holes 22 so as to extend over the upper surface 12a of the cover 12.

The convex impact regions 32 extend from the corresponding receiving apertures 22 on the cover 12 and the concave first impact regions 34 between the convex impact regions 32 have a convex impact region 32, Are disposed below the support members (24). The projecting convex impact areas 32 serve to protect at least the cover and the electronic device from impact and the concave first and second impact areas 34 disposed below the cover 12 also function as a barrier between the device and the cover Lt; RTI ID = 0.0 > energy. Thus, the case 10 provides impact resistance and energy absorption capabilities as a result of the portions of the cushion insert 30 disposed below the cover 12 adjacent to the electronic device and the convex impact areas 32 exposed to the outside . Although illustrated in the present invention with respect to receiving apertures 22 adapted to accommodate the convex impact zones 32, the cover 12 also includes a recessed area (not shown) in addition to the holes to accommodate the convex impact zones 32 therein. 38, respectively.

8 to 17 together show another exemplary embodiment of the protective case 100 according to the present disclosure. Although described in the present invention with reference to a protective case for an electronic device, as in the previous embodiments, the protective case may be adapted to any product that is designed to provide protection or to provide protection. For the purposes of citation, the electronic device will hereinafter be referred to as a cell phone.

As shown, the case 100 includes a cover 12 ', a cushion insert 30 and a liner 40' that can be interconnected or otherwise separated from each other during assembly. In the present embodiment, the cover 12 ', the cushion insert 30 and the liner 40' are each a single integral part, but each of these can be assembled together and / But may be formed as two or more detachable but interlocking parts.

The cushion insert 30 has the same configuration as the previous embodiments.

The liner 40 'may be configured to coincide with the inner surface of at least a portion of the cover 12' and the cushion liner 30. The liner 40 'includes a back section 44, a side wall 46 extending upwardly from the back section 44, and a bezel (not shown) extending outwardly from the side wall 46 to define a front opening 20. [ 48).

The cover 12'includes a back section 14, sidewalls 16 extending upwardly from the back section 14 and one or more sidewalls 16 extending inwardly from one or more sidewalls 16, (70). ≪ / RTI > The back section 14 and side wall 16 each include opposing inner surfaces 14a and 16a and outer surfaces 14b and 16a, respectively.

When assembled, retention arms 70 help retain the bezel 48 and liner against the cell phone when the cell phone is placed in the protective case.

18-21 together show another exemplary embodiment of the protective case 200 according to the present disclosure.

As shown, the case 200 includes a cover 12, a cushion insert 30, and an optional liner 40 (not shown). In the present embodiment, the cover 12, the cushion insert 30 and the optional liner 40 are each a single integral part, but each of these can be assembled together and / But may be formed as two or more detachable but interlocking parts. The cushion insert includes receiving holes 22 in which convex impact areas 32 are disposed to provide improved protection on the front or screen side of the cell phone. The convex impact zones may include a portion of the cushion insert 30 that coincides with the interior of the cover as in the previous embodiments, or they may be separate areas disposed within the receiving holes.

Optionally, in one of the foregoing embodiments, two or more of the cover, liner, and inserts may be co-cast, welded, bonded or glued together using various techniques.

The thickness of the cushion insert 30 may be varied as desired, but its thickness is preferably sufficient to protect the device from impact while maintaining a sufficient thickness to minimize the total weight of the case.

Various other materials and layers form cushioning inserts, as described in co-owned and co-pending U. S. Application No. 13 / 447,093, filed April 13, 2012, which is hereby incorporated by reference in its entirety. Can be used. Other materials useful for cushion inserts and methods of making the materials are described in co-owned and co-pending U.S. Patent Application No. 13 / 208,229, filed August 11, 2011; And 13 / 271,594, filed October 12, 2011, each of which is incorporated herein by reference in its entirety. One preferred configuration of the cushion inserts 30 includes a cushion layer disposed between opposing upper and lower layers, and an optional fiber layer, as described in the aforementioned applications.

In addition to the foregoing, suitable materials for the above layers and adhesives (if used) are described in the above-mentioned patent applications, and US Publication No. US 2008/0034614, which also discloses techniques for making cushion inserts of the present invention US 2009/0255625, each of the above-mentioned publications being incorporated herein by reference in its entirety. The molds for the pads of the present invention are designed such that the layers can be compressed together under conditions sufficient to allow the layers to be bonded together and at the same time to minimize or eliminate foam in the concave impact area for certain embodiments .

Advantages of the improved cases of the present invention include, but are not limited to, improved shock protection, especially for case edges and corners, reduced weight, improved aesthetics, lower fabrication costs, and lower wear for case articles . The improved cases of the present disclosure include removable interconnected internal and external components substantially matching the external surface of the article to be protected. Protective cases may be adapted to any type of product requiring protection, in addition to those mentioned above.

Compounds have been described using standard terminology. For example, any position that is not substituted by the indicated group may be understood as having its valency filled by a bond as indicated, or a hydrogen atom A dash ("-" ) Is used to indicate the point of attachment for the substituent. For example, - CHO is attached through the carbon of the carbonyl group. Unless defined otherwise in the present invention, all percentages in the present invention refer to weight percent (wt.%). In addition, all ranges disclosed herein are exclusive and combinable (e.g., "up to about 25 weight percent, preferably from about 5 weight percent to about 20 weight percent, more preferably from about 10 weight percent to about 15 weight percent, (wt.)% "includes endpoints and all intermediate values of the ranges, such as from about 5 wt% to about 25 wt%, from about 5 wt% to about 15 wt%, and the like. The notation "± 10%" means that the indicated size can range from a quantity of -10% to a quantity of + 10% of the stated value.

Consequently, unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

Although the present disclosure has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. Therefore, the present disclosure is not intended to be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this disclosure, and this disclosure is intended to include all embodiments falling within the scope of any appended claims.

Claims (30)

As a protective case,
A cover including a predetermined thickness and including interconnected support members having a back portion and a side wall connected to the back portion and defined by a plurality of receiving apertures disposed in predetermined areas,
A liner having a back portion and a side wall connected to the back portion, the liner comprising a predetermined thickness, and
A cushion insert comprising convex impact regions disposed adjacent to concave first impact regions,
The convex impact regions being disposed in predetermined regions corresponding to the plurality of receiving holes and having a predetermined thickness greater than the thickness of the cover,
Wherein the cushion is disposed between the cover and the liner such that the plurality of interconnected support members engage concave first impact regions and the convex impact regions extend into the plurality of receiving holes Lt; / RTI >
Protective case.
The method according to claim 1,
Further comprising one or more concave second impact regions,
The thickness of the concave second impact regions being smaller than the thickness of the concave first impact regions,
Protective case.
3. The method of claim 2,
Wherein the convex impact regions comprise grooves in the upper surface of the convex impact region such that the thickness of the grooves is smaller than the thickness of the convex impact regions and greater than the thickness of the concave first impact regions.
Protective case.
The method according to claim 1,
Said cushion insert comprising a shock absorbing material,
Protective case.
The method according to claim 1,
Said cushion insert comprising a multi-layer laminate material,
Protective case.
5. The method of claim 4,
The shock absorbing material is disposed between opposing upper and lower layers of a thermoplastic elastomer (TPE) material.
Protective case.
6. The method of claim 5,
Wherein the laminate material further comprises a reinforcing layer disposed between the bottom layer of the TPE material and the impact absorbing material.
Protective case.
8. The method of claim 7,
Wherein the laminate material further comprises a fiber layer disposed adjacent the lower layer of TPE material, opposite the shock absorbing material.
Protective case.
5. The method of claim 4,
Wherein the cushion insert is a rate dependent material,
Protective case.
10. The method of claim 9,
Wherein the rate dependent material is a polyurethane foam,
Protective case.
The method according to claim 1,
The predetermined thickness of the convex impact regions is sufficient to absorb shocks and / or prevent shocks from being transmitted to the electronic device,
Protective case.
The method according to claim 1,
The case comprising an elastomeric material having a hardness of from about 80 Shore A to about 100 Shore A,
Protective case.
The method according to claim 1,
The case comprises an elastomeric material having a hardness of about 95 Shore A,
Protective case.
13. The method of claim 12,
Wherein the elastomeric material comprises a thermoplastic polyurethane,
Protective case.
The method according to claim 1,
Wherein the thickness of the cover is in the range of about 0.055 "to about 0.095"
Protective case.
The method according to claim 1,
Wherein the thickness of the concave first impact regions is in the range of about 0.025 "to about 0.045"
Protective case.
3. The method of claim 2,
Wherein the thickness of the concave second impact regions is in the range of about 0.010 "to about 0.030"
Protective case.
The method according to claim 1,
The shock-absorbing regions extending over the outer surface of the cover when the case is in the assembled configuration,
Protective case.
8. The method of claim 7,
The reinforcing layer is porous,
Protective case.
8. The method of claim 7,
Wherein the reinforcing layer is a non-
Protective case.
8. The method of claim 7,
Wherein the reinforcing layer is a hydro-entangled nonwoven fabric,
Protective case.
The method according to claim 1,
The cover has an integral,
Protective case.
The method according to claim 1,
The cushion insert is an integral,
Protective case.
The method according to claim 1,
The cover may be co-molded with the cushion insert,
Protective case.
The method according to claim 1,
The cover and cushion insert are adhesively connected,
Protective case.
The method according to claim 6,
The TPE layers are continuously bonded to an impact-absorbing material,
Protective case.
6. The method of claim 5,
The cushion insert comprising a cushion material continuously bonded to opposed adjacent layers and disposed between the opposed adjacent layers,
Protective case.
3. The method of claim 2,
When the case is assembled, the convex impact areas are aligned with the receiving holes,
Protective case.
29. The method of claim 28,
Wherein when the case is assembled, the convex impact regions are received at least partially within the receiving apertures and through the receiving apertures and a portion of the convex impact regions extends over the top surface of the cover,
Protective case.
The method according to claim 1,
Wherein the case comprises an elastomeric material having a hardness in the range of about 80 Shore A to about 100 Shore A and the case insert comprises a speed dependent polyurethane foam having a density in the range of about 5 to about 35 pounds per 3 square feet doing,
Protective case.

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