a preferred embodiment according to the present invention will be described below in detail with reference to the drawings . in this embodiment , a storage case for enclosing a memory card shown in fig1 will be described . a memory card 1 is a mass - storage capacity recording medium called a memory stick , and has a rectangular thin plate - like body 2 in which a memory of several megabytes to several 10s of megabytes is incorporated . the memory card 1 has a terminal portion 3 provided at one end of the body 2 . while the memory card 1 is being inserted into a card slot of an electronic device such as a personal computer and a digital camera , the terminal portion 3 is connected to terminals of the electronic device to write data or read out data in or from the memory card . reference numerals 4 , 5 , 6 denotes positioning recesses , reference numeral 7 denotes a label attachment area and reference numeral 8 denotes a mis - erase preventing switch . fig2 to 9 show the structure of the inventive storage case for enclosing the memory card 1 . as illustrated , as a whole a storage case 10 is shaped like a rectangular thin box and formed by joining a base half 11 and a slide half 12 which can slide along the longitudinal direction of the base half 11 , each of the base half and the slide half being made of a highly - rigid resin material . the above memory card 1 is enclosed as an enclosed object within a space between the base half and the slide half . this storage case 10 is arranged such that the slide half 12 is joined to the base half 11 so as to become slidable . as shown in fig6 slide rail portions 14 protruded on the outer side surfaces of two side plate portions 12 a , 12 b of the slide half 12 are engaged with protruded rail portions 13 protruded on the inside upper ends of the two side plate portions 11 a , 11 b of the base half 11 , whereby the joined state of the base half 11 and the slide half 12 can be retained . on its upper surface portion , the slide half 12 has a plurality of small protrusions 15 to prevent user &# 39 ; s fingers from slipping when a user moves the slide half 12 with fingers , as will be described later on , and a triangle mark 16 indicating the direction in which a user should move the slide half . on its front portion , the slide half 12 has a lid 18 to open and close an opening portion 17 which admits or ejects the memory card as the enclosed object . the lid 18 is integrally formed with the front of the slide half 12 and swings in the upper and lower direction with a thin hinge portion 19 being as a fulcrum to open and close the opening portion 17 at the front of the storage case . in this storage case 10 , as for the material of the base half 11 a relatively hard resin material such as pc , abs or gps is used whereas a relatively soft and highly - durable resin material such as pp and the like is chosen for the slide half 12 because it has the such structure in which to have the above - mentioned hinge portion . the storage case 10 uses a mechanism by which the lid 18 can open and close as the slide half 12 slides . the mechanism for opening and closing the lid 18 will be described in detail . according to this embodiment , on the front of the base half 11 , cam grooves 20 are formed on the inner side walls of the both sides plate portions 11 a , 11 b . on the outer side walls of both sides plate portions 18 a , 18 b of the lid 18 , pin - like protrusions 21 are protruded at the position near the hinge portion 19 . those protrusions 21 are being engaged with the above - mentioned cam grooves 20 . the cam grooves 20 are shaped as inclined grooves with an inclination angle which progressively decreases in the rear and increases in the front . while a user is moving the slide half 12 along in the continuous contact with the base half 11 , the protrusions 21 move along in the continuous contact with the cam grooves 20 to permit the lid 18 to open and close about the hinge portion 19 . specifically , as shown in fig7 ( a ), when the slide half 12 is located at the rearmost position in which it is brought in contact with a rear side plate portion 11 c of the base half 11 , the lid 8 is being closed . in this state , the protrusions 21 are engaged with the cam grooves 20 at their low positions of the rearmost end . while a user slides the slide half 12 along the base half 11 forward as shown in fig7 ( b ), the lid 18 also moves in unison with the slide half 2 and protrusions 21 slide along the inclinations of the cam grooves to the forward high position to enable the lid 18 to rotate about the hinge portion 19 to open . hence , the opening portion 17 at the front of the storage case opens to enable a user to get the memory card in and out of the storage case . when the user slides the slide half 12 rearward from this state , the lid 18 is closed according to the reverse operation . with the above arrangement of the storage case 10 according to this embodiment , while the opening portion 17 is firmly closed by the lid 18 under the state that the memory card 1 is enclosed in the storage case as the enclosed object , the memory card can reliably be prevented from being smudged by dusts and also can reliably be prevented from being dropped unintentionally . since the storage case 10 is molded by a highly - rigid resin material and hence can reliably protect the memory card 1 , which is the enclosed object , from pressure applied from the outside and is excellent in durability . in the storage case 10 , the lid 18 opens and closes as the user slides the slide base 12 , and hence the user can easily get the memory card in and out of the storage case . the manner in which the user gets the memory card in and out of the storage case will be described with reference to fig1 . specifically , as illustrated , while the user is holding the storage case 10 according to this embodiment with one hand , the user can slide the slide half 12 to open the lid 18 with a thumb and get the memory card 1 in and out of the storage case with the other hand . therefore , the storage case is considerably easy to handle . in the storage case with the above arrangement , when the user slides the slide half 12 in the direction in which the lid 18 opens , the front of the slide half 12 is urged to be raised with application of force as the lid 18 is opening upward . as a consequence , contact pressure at the engagement portion between the slide rail portions 14 of the slide half 12 and the protruded rail portions 13 of the base half 11 increases so that frictional resistance increases . as a result , the slide half 12 becomes difficult to slide smoothly and hence cannot slide smoothly . to solve this problem , in particular , in the storage case 10 according to this embodiment , as shown in fig8 ( a ), there is employed a structure such that the protruded rail portion 13 of the base half 11 has a slope 13 a formed at the engagement surface between it and the slide rail portion 14 of the slide body 12 . this slope 13 a is a straight - line inclined slope formed such that the thickness of the protruded rail portion 13 becomes gradually thin toward the front , e . g . the opening portion from the starting point of the position substantially corresponding to the leading front end portion of the slide rail portion 14 of the slide half 12 obtained when the lid 18 is placed in the closed state ( c 1 & gt ; c 2 ). an angle of this slope falls within a range of from approximately 1 . 5 to 2 . 0 . the slope 13 a is not limited to the illustrated straight - line slope with inclination and may be formed as a curve - like slope . with the above structure , in the storage case 10 according to this embodiment , while the user is sliding the slide half 12 in the direction in which the lid 18 opens , even when the front of the slide half 12 is urged to be raised as the lid 18 progressively opens upward as shown in fig8 ( b ), the slide rail portion 14 of the slide half 12 moves along in the continuous contact with the slope 13 a of the protruded rail portion 13 of the base half 11 so that contact pressure between the slide rail portion 14 of the slide half 12 and the protruded rail portion 13 of the base half 11 can be prevented from increasing . consequently , the slide half 12 can be prevented from becoming difficult to move smoothly and hence the movement of the slide half 12 can be made smooth . besides the above arrangement , in the storage case 10 according to this embodiment , when the memory card 1 , which is the enclosed object , is enclosed in the storage case , the memory card is retained in the slide half 12 with pressure . specifically , in the inside of the storage case 10 , as shown in fig5 ( b ), two sets of opposing arcuate protrusions 23 , 26 b are disposed on the inner side walls of the respective side plates 12 a , 12 b of the slide half 12 in parallel to each other . a size between the protrusions 23 a and 23 b on both sides ( inside size ) a is slightly smaller than a width b of the memory card 1 shown in fig1 ( in the size in actual practice , the size a between the protrusions 23 a and 23 b on both sides falls within a range of from 21 . 2 to 21 . 3 mm and slightly overlaps the width b of the memory card 1 within 21 . 45 ( 0 . 05 mm from a size standpoint ). consequently , when the memory card 1 is inserted into the storage case , while the protrusions 23 a and 23 b are pressing against the respective sides of the memory card , the memory card is inserted into the slide half 12 with pressure and retained in that state . in the storage case 10 according to this embodiment , since the memory card 1 , which is the enclosed object , is inserted into the slide half 12 with pressure and retained therein , whatever direction a user inserts the memory card 1 into the slide half ( the user inserts the memory card into the slide half with the terminal portion 3 toward the user , the user inserts the memory card into the slide half in the direction opposite to the above direction and the user inserts the memory card into the slide half inside out ), the memory card can be retained in the slide half 12 firmly . consequently , when the user slides the slide half 12 , the memory card also moves in unison with the slide half so that the user can get the memory card in and out of the storage case smoothly . specifically , when the user gets the memory card in the storage case , while the user is inserting the memory card into the storage case , the user should slide the slide half 12 in the direction in which the lid 18 closes so that the memory card can be moved in unison with the slide half 12 and smoothly enclosed in the storage case . when the user gets the memory card out of the storage case , the user should slide the slide half 12 in the direction in which the lid 18 opens so that the memory card can be moved in unison with the slide half 12 and ejected from the opening portion 17 . hence , the user can smoothly get the memory card out of the storage case . in this manner , in the storage case 10 according to this embodiment , since the memory card is moved as the slide half 12 slides , the user can smoothly get the memory card in and out of the storage case , and hence the storage case becomes easier to handle . further , in the storage case 10 according to this embodiment , while the lid 18 is being opened , even when the user turns the opening portion 17 downward or lightly shakes the storage case in this state , the memory card is difficult to be dropped because the memory card is inserted into the slide half 12 with pressure and thereby firmly retained therein . therefore , the memory card can reliably be prevented from being lost . memory cards are costly and are as expensive as thousands of yen to tens of thousands of yen , and hence the above effect for preventing memory cards from being lost is considerably effective . furthermore , in the storage case 10 according to this embodiment , when the lid 18 is closed , the lid 8 is locked in its closed state . specifically , on the front end of the lid 18 , the engagement protruded portions 24 are formed on the two side plate portions 18 a , 18 b . when the lid 18 closes , the engagement protruded portions 24 are engaged with the recess - like portions 25 formed on the front end ( both sides of the opening portion 17 ) of the two side plate portions 11 a , 11 b of the base half 11 . as a consequence , since the lid 18 is locked so that its front end can be prevented from being raised , there is no risk that the lid 18 will be opened by other force than operating force . therefore , the memory card can reliably be protected . further , the storage case 10 according to this embodiment includes a click mechanism to cause it to click when the movement of the slide half 12 is brought to an end while the user is sliding the slide half 12 . to be more concrete , on its inner side walls of the two side plate portions 11 a , 11 b , the base half 11 has click protrusions 26 and 27 formed with a predetermined space before and behind . when the user slides the slide half 12 , protruded portions 28 formed on the rear ends of the two side plate portions 12 a , 12 b of the slide half 12 pass over the click protrusions 26 , 27 to cause the storage case to click . specifically , when the user slides the slide half 12 in the direction in which the lid 18 opens , just before the lid 18 opens fully , the protruded portions 28 pass over the preceding click protrusions 26 to cause the storage case to click . conversely , when the user slides the slide half 12 in the direction in which the lid 18 closes , immediately before the slide half 12 comes in contact with the rear side plate portions 11 c of the base half 11 , the protruded portions 28 pass over the succeeding click protrusions 27 to cause the storage case to click . as described above , the storage case according to this embodiment can click when the movement of the slide half 12 is brought to an end , and hence this storage case is very comfortable for the user . in particular , when the slide half is slid in the direction in which the lid 18 opens , immediately before the lid 18 opens completely , the storage case can click and hence the user can definitely recognize when the movement of the slide half is brought to an end . therefore , it becomes possible to effectively avoid an accident such as when the storage case is broken after the user has moved the slide half along in continuous contact with the base half excessively until the protrusions 21 of the lid 18 are disengaged from the cam grooves 20 . on its inner side walls of the two side plate portions 11 a , 11 b , the base half 11 has stopper protrusions 29 located ahead of the click protrusions 26 . when the lid 18 opens completely , the protruded portions 28 abut against the stopper protrusions 29 to engage the slide half 12 with the base half so as not to move farther forward . further , in the storage case 10 according to this embodiment , on its outer side walls of the two side plate portions 11 a , 11 b , the base half 11 has a plurality of engagement concave holes 30 disposed in parallel to each other in the longitudinal direction . those engagement concave holes are used to enclose the storage case according to this embodiment in another case . fig1 shows an example of another case . specifically , a case 40 is a card - size case to enclose a plurality of storage cases 10 according to this embodiment in parallel . while the storage case 10 according to this embodiment is being enclosed in this case 40 , the engagement concave holes 30 of the storage case 10 according to this embodiment engage with convex portions 41 projected on two inner side walls of its compartment and hence the storage case of this embodiment can be retained in the fixed state . when a plurality of storage cases 10 according to this embodiment are enclosed together in the card - size case 40 , the storage case according to this embodiment becomes more convenient to carry . while the embodiment of the present invention has been described so far , the present invention is not limited to the above embodiment . for example , while the cam grooves 20 are formed on the base half 11 and the protrusions 21 are formed on the lid 18 as the mechanism for opening and closing the lid 18 in the above embodiment , the present invention is not limited thereto , stated otherwise , the cam grooves 20 may be formed on the lid 18 and the protrusions 21 may be formed on the base half 11 . the storage case according to the present invention is not limited to the storage case for use in enclosing the memory card and can be widely applied to storage cases for use in enclosing all sorts of products . as described above , in the storage case according to the present invention , while the enclosed object is being enclosed in the storage case , since the opening portion is firmly closed by the lid , the storage case can reliably be prevented from being smudged by dusts and the enclosed object can reliably be prevented from being dropped unintentionally . according to this storage case , since the user can open the lid by only sliding the slide half and can easily get the enclosed object in and out of the storage case , the storage case is considerably easy to handle . according to this storage case , in its protruded portions on the insides of the two side plate portions of the base half which retains the slide base in the joined state , the engagement surface between the base half and the slide half includes a slope formed such that the thickness of the protruded portion progressively decreases in the opening portion . consequently , when the user slides the slide half in the direction in which the lid opens , the slide half can be prevented from becoming difficult to move smoothly and hence the slide half can slide smoothly . according to this storage case , since the enclosed object is inserted into the slide half with pressure and retained therein , regardless of the direction in which the user inserts the enclosed object into the storage case , the enclosed object can be firmly retained in the slide half . moreover , since the enclosed object also is moved as the slide half is slid , the user can smoothly get the enclosed object in and out of the storage case . further , while the lid is being opened , the enclosed object can be inserted into the slide half with pressure and firmly retained therein , and hence the enclosed object is difficult to drop unintentionally . according to this storage case , since the lid is engaged with a part of the base half and thereby locked when the lid is closed , the lid can be prevented from being opened by force , and hence the enclosed object can reliably be protected . further , according to this storage case , since the storage case can click when the movement of the slide half is brought to an end , the storage case becomes comfortable for the user . furthermore , since the storage case can click , it becomes possible to prevent the user from moving the slide half excessively . there is then the effect that the storage case can be prevented from being broken . furthermore , since this storage case includes the engagement portions engaged with another case to retain another case in the fixed state when this storage case is enclosed in another case , when the user encloses a plurality of storage cases together in another case and carries the storage case , this storage case becomes convenient . when the storage case according to the present invention with the above various characteristics are made commercially available on the market as accessories of products , it is possible to increase value of a product much more . having described preferred embodiments of the invention with reference to the accompanying drawings , it is to be understood that the invention is not limited to those precise embodiments and that various changes and modifications could be effected therein by one skilled in the art without departing from the spirit or scope of the invention as defined in the appended claims .
a storage case has a base half and a slide half , the slide half moveably attached to the base half . the slide half can move along in continuous contact with the base half . a lid is integrally formed with the slide half , and opens and closes an opening in the slide half for the insertion or removal of objects . when the slide half is slid along in continuous contact with the base half , protrusions on the lid move along in continuous contact with cam grooves on the base half to permit the lid to open and close . the storage case can store a memory card , and protect the card from being smudged , dirtied or damaged from impact .