Abstract:
A probe cover which is to be attached to a socket that is configured to support a plurality of contact probes, includes: a base; two positioning pins which are disposed on the base; and at least one supporting member which is disposed on the base. The two positioning pins and the supporting member are capable of positioning the base in a state where the base is separated from the socket by a predetermined distance, and a mutual separation distance between the two positioning pins is changeable.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a probe cover which is to be attached to a socket that supports a plurality of contact probes. 
       BACKGROUND ART 
       [0002]    For example, a contact probe is used for electrically connecting an inspection object such as a semiconductor integrated circuit with an inspection substrate on the side of a measuring apparatus. Under inspection, usually, a socket which supports a plurality of contact probes is fixed to an inspection substrate, and the socket is pressed against an inspection object. At this time, one end of each contact probe is contacted with corresponding electrode of the inspection substrate, and the other end thereof is contacted with corresponding electrode (for example, solder bumps) of the inspection object. In packaged state for shipping or unused state (stored state) of such a socket, in order to protect the tip ends of the contact probes which are projected from the socket, a probe cover is attached to the socket. In the present state of the art, the probe cover is fixed to the socket by screwing. For example, screwing is performed in four to six portions.  FIGS. 15 and 16  illustrate a state where a conventional probe cover  801  is screwed to a socket  900  in four portions. 
       CITATION LIST 
     Patent Literature 
       [0000]    
       
         Patent Literature 1: JP-A-2011-14377 
       
     
       SUMMARY OF INVENTION 
     Technical Problem 
       [0004]    When a probe cover is to be fixed to a socket by screwing, a plurality of holes of the probe cover and those of the socket must be mutually coaxial. On the other hand, sockets have various shapes, and the positions of holes which can be used in screwing are different depending on type of the socket. Currently, therefore, probe covers which conform to respective sockets are custom-designed. However, there are problems in that many design man-hours are required and thus lead high cost for the production. 
         [0005]    The present invention has been conducted in view of such circumstances. It is an object of the present invention to provide a probe cover which can be attached to a plurality of sockets having different shapes. 
       Solution to Problem 
       [0006]    An aspect according to the present invention is a probe cover. The probe cover is a probe cover which is to be attached to a socket that is configured to support a plurality of contact probes, the probe cover comprising a base; two positioning pins which are disposed on the base; and at least one supporting member which is disposed on the base, wherein the two positioning pins and the supporting member are capable of positioning the base in a state where the base is separated from the socket by a predetermined distance, and a mutual separation distance between the two positioning pins is changeable. 
         [0007]    Preferably, the mutual separation distance is selectable from continuous values. 
         [0008]    The base may include guiding portions which are configured to slidably support the two positioning pins, respectively. 
         [0009]    Preferably, both the guide portions are disposed on a same linear line. 
         [0010]    Preferably, the probe cover further includes a locking unit which is configured to lock one of the two positioning pins at an arbitrary sliding position. 
         [0011]    Preferably, the base has a plurality of mounting holes, and the supporting member is attachable to an arbitral one of the mounting holes. 
         [0012]    Preferably, two supporting members are included, and the two supporting members are placeable respectively on both sides of a linear line passing through the two positioning pins. 
         [0013]    Preferably, the base has a disk-like shape. 
         [0014]    Preferably, the base is transparent. 
         [0015]    Arbitrary combinations of the above-described components, and modes realized by converting expressions of the invention between a method, a system, and the like are also effective as aspects according to the present invention. 
       Advantageous Effects of Invention 
       [0016]    According to the present invention, it is possible to provide a probe cover which can be attached to a plurality of sockets having different shapes. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0017]    [ FIG. 1 ]  FIG. 1  is a perspective view of a probe cover  1  according to an embodiment of the present invention as seen from the upper side. 
           [0018]    [ FIG. 2 ]  FIG. 2  is a perspective view of the probe cover  1  as seen from the lower side. 
           [0019]    [ FIG. 3 ]  FIG. 3  is an exploded perspective view of the probe cover  1  as seen from the upper side. 
           [0020]    [ FIG. 4 ]  FIG. 4  is an exploded perspective view of the probe cover  1  as seen from the lower side. 
           [0021]    [ FIG. 5 ]  FIG. 5  is a plan view of the probe cover  1 . 
           [0022]    [ FIG. 6 ]  FIG. 6  is an enlarged view of part A in  FIG. 5 . 
           [0023]    [ FIG. 7 ]  FIG. 7  is an enlarged view of part B in  FIG. 5  (a locked state). 
           [0024]    [ FIG. 8 ]  FIG. 8  is an enlarged view of part B in  FIG. 5  (an unlocked state). 
           [0025]    [ FIG. 9 ]  FIG. 9  is a sectional view taken along C-C in  FIG. 5 . 
           [0026]    [ FIG. 10 ]  FIG. 10  is a front sectional view of the probe cover  1 . 
           [0027]    [ FIG. 11 ]  FIG. 11  is an enlarged view of part D in  FIG. 10 . 
           [0028]    [ FIG. 12 ]  FIG. 12  is a right side view of the probe cover  1 . 
           [0029]    [ FIG. 13 ]  FIG. 13  is a perspective view of a state where the probe cover  1  is attached to a socket  100 , as seen from the upper side. 
           [0030]    [ FIG. 14 ]  FIG. 14  is a perspective view of the state where the probe cover  1  is attached to a socket  100 , as seen from the lower side. 
           [0031]    [ FIG. 15 ]  FIG. 15  is a perspective view of a state where a conventional probe cover  801  is screwed to a socket  900 , as seen from the upper side. 
           [0032]    [ FIG. 16 ]  FIG. 16  is a perspective view of the state where a conventional probe cover  801  is screwed to a socket  900 , as seen from the lower side. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0033]    Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. The identical or equivalent components, members, and the like illustrated in the drawings are denoted by the same reference numerals, and duplicated description is adequately omitted. The embodiment is not intended to limit the invention but is a mere example, and all features described in the embodiment, and combinations thereof are not always essential to the invention. 
         [0034]      FIG. 1  is a perspective view of a probe cover  1  according to the embodiment of the present invention as seen from the upper side.  FIG. 2  is a perspective view of the probe cover as seen from the lower side.  FIG. 3  is an exploded perspective view of the probe cover  1  as seen from the upper side.  FIG. 4  is an exploded perspective view of the probe cover  1  as seen from the lower side.  FIG. 5  is a plan view of the probe cover  1 . In  FIG. 5 , stand pins  5  are highlighted by hatching.  FIG. 6  is an enlarged view of part A in  FIG. 5 .  FIG. 7  is an enlarged view of part B in  FIG. 5  (a locked state).  FIG. 8  is an enlarged view of part B in  FIG. 5  (an unlocked state).  FIG. 9  is a sectional view taken along C-C in  FIG. 5 .  FIG. 10  is a front sectional view of the probe cover  1 .  FIG. 11  is an enlarged view of part D in  FIG. 10 .  FIG. 12  is a right side view of the probe cover  1 .  FIG. 13  is a perspective view of a state where the probe cover  1  is attached to a socket  100 , as seen from the upper side.  FIG. 14  is a perspective view of the state where the probe cover  1  is attached to a socket  100 , as seen from the lower side. 
         [0035]    The probe cover  1  is attached to the socket  100  that supports a plurality of contact probes, to protect the tip ends of the contact probes which are projected from the socket  100 . In  FIGS. 13 and 14 , the contact probes supported by the socket  100  are not illustrated. The probe cover  1  may include a base  2 , two positioning pins  3  having the same shape, two positioning pin holders  4  having the same shape, and two stand pins  5  which serves as the supporting members, and which have the same shape. Although the shape and color of the base  2  are not particularly limited, the base is preferably formed as a transparent resin molded body having a disk-like shape. In the embodiment, the base is formed as described above. All the positioning pins  3 , the positioning pin holders  4 , and the stand pins  5  are formed, for example, as resin molded bodies. 
         [0036]    The base  2  has a sliding guide groove  2   a  and a sliding lock groove  2   b.  In each of the bottom portions of the sliding guide groove  2   a  and the sliding lock groove  2   b,  a sliding guide hole  2   c  which functions as the guiding portion is disposed. The widths in the short-side direction (the widths in a direction perpendicular to a sliding direction) of the sliding guide holes  2   c  are smaller than the widths of the sliding guide groove  2   a  and the sliding lock groove  2   b  in the same direction. In order to enable the below-described positioning pin holders  4  to be rotatable, the width in the short-side direction of the sliding lock groove  2   b  is larger than that in the same direction of the sliding guide groove  2   a.  The sliding guide groove  2   a,  the sliding lock groove  2   b,  and the both sliding guide holes  2   c  are disposed on the same straight line which passes through the center of the base  2 . In the both side walls of the sliding lock groove  2   b,  locking rack portions  2   d  are disposed along the sliding direction, respectively. 
         [0037]    The base  2  has a plurality of recesses  2   e.  The recesses  2   e  radially elongate from the inner side of the base  2  toward the outer side. In each of the bottom portions of the recesses  2   e,  a plurality of stand pin locking holes  2   f  which serves as the plurality of mounting holes are disposed. In the illustrates example, three recesses  2   e  are disposed at equiangular intervals in circumferential direction on each side of a straight line passing through the sliding guide groove  2   a  and the sliding lock groove  2   b.  Five stand pin locking holes  2   f  are disposed in the bottom surface of each of the recesses  2   e.    
         [0038]    Each of the positioning pins  3  has a pair of nail portions  3   a,  a base portion  3   b,  and a pin body portion  3   c . The pair of nail portions  3   a  is upward erected from the base portion  3   b.  The pin body portion  3   c  has, for example, a columnar shape, and is downward erected from the base portion  3   b.  The outer diameter of the pin body portion  3   c  is smaller than that of the base portion  3   b.  The lower end surface of the base portion  3   b  functions as a placing surface for the socket  100  ( FIGS. 13 and 14 ). The pin body portion  3   c  has a socket locking projection  3   d  on the outer circumferential surface in the vicinity of the base portion  3   b.    
         [0039]    The positioning pin holders  4  are housed inside of the sliding guide groove  2   a  and the sliding lock groove  2   b , respectively. Preferably, the upper surfaces of the positioning pin holders  4  are substantially flush with the upper surface of the base  2 . Each of the positioning pin holders  4  has a pair of tongue piece portions (nail portions)  4   a,  a positioning pin lock hole  4   b,  and a predetermined number of ridges  4   c.  The pair of tongue piece portions  4   a  is locked at a predetermined rotation position by the locking rack portions  2   d  of the sliding lock groove  2   b  ( FIG. 7 ). The locking rack portions  2   d  and the tongue piece portions  4   a  function as locking units for locking the positioning pins  3  at arbitrary sliding positions. The positioning pin lock hole  4   b  is disposed in the middle of the positioning pin holder  4 . As illustrated in  FIG. 9 , a pair of locking projections  4   d  is disposed on the inner surface of the positioning pin lock hole  4   b  to lock the pair of nail portions  3   a  of the positioning pin  3 . In the positioning pin holder  4 , as illustrated in  FIG. 3  and the like, two ridges  4   c  that elongate vertically are disposed on each of the side surfaces on which the tongue piece portions  4   a  are not disposed. The ridges  4   c  have a function of preventing the positioning pin holder  4  in the sliding guide groove  2   a  from rattling ( FIG. 6 ). 
         [0040]    Each of the stand pins  5  has a stand portion  5   a  and a locking pin portion  5   b.  The locking pin portion  5   b  has, for example, a columnar shape, and is erected from the middle of the upper surface of the stand portion  5   a.  A locking recess  5   c  is disposed on the outer circumferential surface in the vicinity of the tip end of the locking pin portion  5   b.  As illustrated in  FIG. 11 , the locking recess  5   c  is fitted to a squeezed portion  2   g  of the stand pin locking hole  2   f  to function as a slipping-off preventing portion for the stand pin  5 . 
         [0041]    A procedure of assembling the probe cover  1 , and that of attaching the probe cover to the socket  100  will be described. 
         [0042]    First, the pair of nail portions  3   a  of each of the positioning pins  3  is positioned within the sliding guide groove  2   a  from the lower side through the sliding guide hole  2   c  formed in the bottom surface of the sliding guide groove  2   a.  Then, the positioning pin holder  4  is inserted from the upper side into the sliding guide groove  2   a,  and the pair of nail portions  3   a  of the positioning pin  3  is engaged with the pair of locking projections  4   d  in the positioning pin lock hole  4   b.  In this state, as illustrated in  FIG. 9 , the upper end surface of the base portion  3   b  of the positioning pin  3  is butted against the lower end surface (the surface surrounding the sliding guide hole  2   c ) of the base  2 . In this way, the pair of locking projections  4   d  of the positioning pin holder  4 , and the circumference of the sliding guide hole  2   c  are clamped by the pair of nail portions  3   a  and the upper end surface of the base portion  3   b,  and the positioning pin  3  is slidable (supported so as to be slidable with respect to the base  2 ) with a constant sliding resistance together with the positioning pin holder  4  along the sliding guide groove  2   a  and the sliding guide hole  2   c.    
         [0043]    Also the other positioning pin  3  and the other positioning pin holder  4  are attached to the base  2  in a similar procedure. When the positioning pin holder  4  is inserted from the upper side into the sliding lock groove  2   b,  however, the rotation position of the positioning pin holder  4  is set as illustrated in  FIG. 8  (the tongue piece portions  4   a  are not engaged with the locking rack portions  2   d ). According to the configuration, the other positioning pin  3  is slidable (supported so as to be slidable with respect to the base  2 ) with a constant sliding resistance together with the positioning pin holder  4  along the sliding guide groove  2   c  in the sliding lock groove  2   b.  The positioning pins  3  and the positioning pin holders  4  may be first attached to either of the sliding guide groove  2   a  and the sliding lock groove  2   b.    
         [0044]    After the two positioning pins  3  and the two positioning pin holders  4  are attached to the base  2 , the positioning pins  3  are slid in conformity to the positions of through holes of the socket  100  which is the attachment destination of the probe cover  1 , and the positioning pin  3  and positioning pin holder  4  on the side of the sliding lock groove  2   b  are rotated by 90°, thereby changing the state from the unlocked state illustrated in  FIG. 8  to the locked state illustrated in  FIG. 7 . This causes the positioning pin  3  and positioning pin holder  4  on the side of the sliding lock groove  2   b  are locked to the current sliding position. Even in the case where the sliding position is slightly deviated when the positioning pin  3  and positioning pin holder  4  on the side of the sliding lock groove  2   b  are set to the locked state illustrated in  FIG. 7 , this can be coped with by adjusting the sliding position of the positioning pin  3  and positioning pin holder  4  which are on the side of the sliding guide groove  2   a,  and which are always slidable. 
         [0045]    Next, two stand pins  5  are attached to the base  2 . The locking pin portion  5   b  of each of the stand pins  5  is inserted into a desired one of the stand pin locking holes  2   f  of the base  2 , and, as illustrated in  FIG. 11 , the locking recess  5   c  of the locking pin portion  5   b,  and the squeezed portion  2   g  of the stand pin locking hole  2   f  are fitted to each other, thereby locking the stand pin  5  to the stand pin locking hole  2   f.  The tip end of the locking pin portion  5   b  is located in the recess  2   e  of the base  2 , and does not protrude from the upper surface of the base  2 . The attaching positions (stand pin locking holes  2   f  to which the stand pins are to be attached) of the two stand pins  5  are adequately determined in accordance with the shape of the socket  100  which is the attachment destination of the probe cover  1 . Alternatively, the stand pins  5  may be first attached to the base  2  before the positioning pins  3  and the positioning pin holders  4  are attached to the base  2 . 
         [0046]    When the two positioning pins  3 , the two positioning pin holders  4 , and the two stand pins  5  are attached to the base  2  (when the assembling of the probe cover  1  is completed), the probe cover  1  is attached to the socket  100  as illustrated in  FIGS. 13 and 14 . Specifically, the pin body portion  3   c  of each of the positioning pins  3  is inserted into the through hole  101  of the socket  100 , and the socket locking projection  3   d  of the pin body portion  3   c  is fitted into the through holes  101 . Then, the socket locking projection  3   d  presses the inner surface of the through hole  101 , and exerts a constant resistance force against slipping-off to lock the pin body portion  3   c  to the through hole  101 , and prevent the probe cover  1  from rattling with respect to the socket  100 . When the pin body portion  3   c  is inserted up to the end of the through holes  101 , the lower end surface of the base portion  3   b  of the positioning pin  3 , and that of the stand portion  5   a  of the stand pin  5  are contacted with the upper surface of the socket  100 . In this way, the probe cover  1  is positioned and attached to the socket  100  by the two positioning pins  3 , the two positioning pin holders  4 , and the two stand pins  5  in a state where the lower surface of the base  2  is separated by a constant distance from the upper surface of the socket  100 . 
         [0047]    A procedure of detaching the probe cover  1  from the socket  100 , and that of disassembling the probe cover will be described. 
         [0048]    When, while holding the base  2 , a force of a constant level or higher is applied to the prove cover  1  in the direction along which the probe cover  1  is separated from the socket  100 , the pin body portions  3   c  of the positioning pins  3  are pulled out from the through holes  101  of the socket  100 , and the probe cover  1  is separated from the socket  100 . When the positioning pin  3  on the side of the sliding lock groove  2   b  is rotated by 90°, the engagement between the positioning pin holder  4  and the locking rack portion  2   d  is cancelled ( FIG. 7 → FIG. 8 ). When the positioning pin  3  is downward pulled while pressing and shortening the pair of nail portions  3   a  of the positioning pin  3 , the positioning pin  3  is separated from the positioning pin holder  4  and the base  2 , and the positioning pin holder  4  becomes separable from the sliding guide groove  2   a  and the sliding lock groove  2   b.  When the stand pin  5  is downward pulled by a force of a constant level or higher while holding the stand portion  5   a,  the stand pin  5  is separated from the base  2 . 
         [0049]    According to the embodiment, the following effects can be achieved.
   (1) The mutual separation distance between the two positioning pins  3  can be changed. When the mutual separation distance between the two positioning pins  3  is adjusted in accordance with the positions of the through holes  101  of the sockets  100  which is the attachment destination of the probe cover  1 , therefore, the probe cover  1  can be attached to socket  100  having different sizes and various shapes (the versatility of the probe cover  1  is enhanced). Consequently, it is not necessary to custom-design probe covers conforming to respective sockets, and therefore design man-hours and the production cost can be reduced.   (2) When the probe cover  1  is to be attached to the socket  100 , fixation by screwing or the like is not necessary. Therefore, works of attaching and detaching the probe cover to the socket  100  are easily performed.   (3) The mutual separation distance between the two positioning pins  3  can be selected from continuous values by means of sliding. As compared with the case where the mutual separation distance is selected from discrete values, therefore, the positioning pins  3  can be surely positioned with respect to the through holes  101  of the socket  100 .   (4) One of the positioning pins  3  can be locked at an arbitrary sliding position by engaging the pair of tongue piece portions  4   a  of the positioning pin holder  4  with the locking rack portions  2   d  of the sliding lock groove  2   b . After the probe cover  1  is attached to the socket  100 , therefore, sliding of the positioning pin  3  along the sliding guide hole  2   c  (namely, sliding of the base  2  with respect to the socket  100 ) can be prevented from occurring.   (5) The attachment destinations of the two stand pins  5  can be arbitrarily selected from the many stand pin locking holes  2   f.  Therefore, the two stand pins  5  can be adequately placed in accordance with the various shapes of sockets  100 .   (6) The probe cover  1  is contacted with the upper surface of the socket  100  through the four places, i.e., the two positioning pins  3  and the two stand pins  5 . Therefore, a posture in which the base  2  is parallel to the upper surface of the socket  100  can be easily maintained.   (7) The base  2  has a disk-like shape. Unlike the case where the base  2  has a quadrangular shape such as a square or a rectangle, therefore, there does not arise a problem in that rotation positions do not coincide with the socket  100  which often has a quadrangular shape such as a square or a rectangle as seen from the upper side.   (8) Since the base  2  is transparent, it is possible to visually check the through holes  101  of the socket  100  through the base  2 , and hence the workability in attachment of the probe cover  1  to the socket  100  is high.   
 
         [0058]    Although the present invention has been described with reference to the embodiment, it is obvious to those skilled in the art that the components and processes of the embodiment can variously modified within the scope of the claims. Hereinafter, modifications will be described. 
         [0059]    The two positioning pins  3  may have different shapes. This is similarly applicable also to the two positioning pin holders  4  and the two stand pins  5 . 
       REFERENCE SIGNS LIST 
       [0000]    
       
           1  probe cover,  2  base,  2   a  sliding guide groove,  2   b  sliding lock groove,  2   c  sliding guide hole,  2   d  locking rack portion,  2   e  recess,  2   f  stand pin locking hole,  2   g  squeezed portion,  3  positioning pin,  3   a  nail portion,  3   b  base portion,  3   c  pin body portion,  3   d  socket locking projection,  4  positioning pin holder,  4   a  tongue piece portion,  4   b  positioning pin lock hole,  4   c  ridge,  4   d  locking projection,  5  stand pin,  5   a  stand portion,  5   b  locking pin portion,  5   c  locking recess,  100  socket,  101  through hole,  801  probe cover,  900  socket