Abstract:
An electronic apparatus includes: a first cover forming a first external surface of the electronic apparatus; a second cover forming the first external surface in conjunction with the first cover, the second cover being capable of being separated from an edge of the first cover in a first direction along the first external surface; an elastically deformable first engaging portion formed at the edge of the first cover; and a second engaging portion formed at an edge of the second cover, the second engaging portion being engageable with the first engaging portion. The first engaging portion is elastically deformable in a second direction intersecting the first direction and being along the first external surface.

Description:
BACKGROUND 
       [0001]    The present technology relates to an electronic apparatus having an external surface formed by two covers. 
         [0002]    U.S. Patent Application Publication No. 2010/0254080 (hereinafter referred to as Patent Document 1) below discloses an electronic apparatus functioning as a game device and an audio-visual apparatus. Some electronic apparatuses include a user-replaceable part. For example, the electronic apparatus of Patent Document 1 includes a hard disk drive. A user may desire to use a hard disk drive having a higher capacity as necessary. 
       SUMMARY 
       [0003]    Consideration has been given to forming one (for example an upper surface) of external surfaces of an electronic apparatus with two covers, and covering a replaceable part such as a hard disk drive or the like with one cover. According to this structure, the inside of the electronic apparatus can be exposed greatly by removing one cover, and therefore the work of replacing the part is facilitated. As a method for connecting the two covers to each other, connecting the two covers to each other by engaging portions formed on internal surfaces of the covers is considered. However, depending on engaging structures, parts included in the electronic apparatus and the engaging portions tend to interfere with each other. 
         [0004]    It is desirable to provide an electronic apparatus that can prevent interference between parts disposed inside covers and engaging structures of the two covers. 
         [0005]    According to an embodiment of the present technology, there is provided an electronic apparatus including: a first cover forming a first external surface of the electronic apparatus; a second cover forming the first external surface in conjunction with the first cover, the second cover being capable of being separated from an edge of the first cover in a first direction along the first external surface; an elastically deformable first engaging portion formed at the edge of the first cover; and a second engaging portion formed at an edge of the second cover, the second engaging portion being engageable with the first engaging portion. The first engaging portion is elastically deformable in a second direction intersecting the first direction and being along the first external surface. 
         [0006]    According to the embodiment of the present technology, the first engaging portion is elastically deformed in the second direction along the first external surface. It is thus possible to prevent interference between parts included in the electronic apparatus and the engaging structures of the two covers. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is a perspective view of an electronic apparatus according to an embodiment of the present technology; 
           [0008]      FIG. 2  is an exploded perspective view of the electronic apparatus; 
           [0009]      FIG. 3  is a plan view of covers of the electronic apparatus; 
           [0010]      FIG. 4  is a diagram of assistance in explaining the engaging structures of the covers; 
           [0011]      FIG. 5  is a diagram of assistance in explaining the engaging structures of the covers; 
           [0012]      FIGS. 6A ,  6 B, and  6 C are sectional views of edges of the covers in a state in which the covers are connected to each other; 
           [0013]      FIG. 7  is a perspective view of the rear side of the electronic apparatus; 
           [0014]      FIG. 8  is a perspective view of the lower side of the left cover; and 
           [0015]      FIG. 9  is a diagram showing a modification of an engaging portion. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0016]    A preferred embodiment of the present technology will hereinafter be described with reference to the drawings.  FIG. 1  is a perspective view of an electronic apparatus  1  according to the embodiment of the present technology.  FIG. 2  is an exploded perspective view of the electronic apparatus  1 .  FIG. 3  is a plan view of a right cover  20 R and a left cover  20 L of the electronic apparatus  1 . In the following description, X1 and X2 shown in these figures represent a right direction and a left direction, respectively, Y1 and Y2 represent a forward direction and a rearward direction, respectively, and Z1 and Z2 represent an upward direction and a downward direction, respectively. 
         [0017]    The electronic apparatus  1  is an entertainment device functioning as a game device and an audio-visual apparatus. The electronic apparatus  1  outputs moving image data generated by executing a game program, video and audio data obtained from a recording medium such as an optical disk or the like, and/or video and audio data obtained through a network to a display device such as a television set or the like. As shown in  FIG. 1 , an insertion slot  2  for inserting an optical disk and a connector  3  for connecting a device such as a controller or the like are provided in a front surface of the electronic apparatus  1 . In addition, a power button  4   b  and an optical disk ejecting button  4   a  are provided in the front surface of the electronic apparatus  1 . 
         [0018]    As shown in  FIG. 2 , the electronic apparatus  1  has an upper cover  20  and a lower cover  60  as members forming an external surface of the electronic apparatus  1 . The electronic apparatus  1  in the example described here further has a frame  50 . Various devices included in the electronic apparatus  1 , such as a circuit board  5 , a power supply unit (not shown), an optical disk drive device, and the like, are attached to the frame  50 . The upper cover  20  and the lower cover  60  cover an upper side and a lower side, respectively, of the frame  50 , and are attached to the frame  50 . 
         [0019]    The upper cover  20  forms an upper surface of the electronic apparatus  1 . The upper cover  20  has a right cover  20 R (first cover) and a left cover  20 L (second cover). These covers can be separated from each other in a direction along the upper surface of the electronic apparatus  1  (that is, in a direction along upper surfaces of the covers  20 R and  20 L). In the example described here, the direction along the upper surface is a left-right direction. The left cover  20 L can be separated in a left direction from an edge of the right cover  20 R in a state of the right cover  20 R being fixed to a main body (that is, the frame  50 ) of the electronic apparatus  1 . As will be described later in detail, engaging portions  40  and  30  engageable with each other are formed at an edge of the left cover  20 L and an edge of the right cover  20 R, respectively. The left cover  20 L can be separated from the right cover  20 R and removed from the electronic apparatus  1  by releasing the engagement of the engaging portions  40  and  30  with each other. 
         [0020]    A user-replaceable part is disposed on the upper side of the frame  50 . The replaceable part is for example a hard disk drive  6  shown in  FIG. 2 . The circuit board  5  is attached to the upper side of the frame  50 . The hard disk drive  6  is connected to a connector (not shown) provided to the circuit board  5 . The hard disk drive  6  is disposed in a left side portion of the electronic apparatus  1 , and is covered by the left cover  20 L. The hard disk drive  6  in the example described here is disposed on a front side in particular. A user can replace the hard disk drive  6  by removing the left cover  20 L. Incidentally, the user-replaceable part is not limited to the hard disk drive  6 . 
         [0021]    As shown in  FIG. 3 , the left cover  20 L and the right cover  20 R have respective edges facing each other. That is, the right edge of the left cover  20 L and the left edge of the right cover  20 R face each other. These edges extend linearly in a forward-rearward direction. The left cover  20 L is provided with a plurality of engaging portions  40  arranged along the edge of the left cover  20 L. In the example described here, a plurality of projecting portions  45  are formed on the lower surface of the left cover  20 L. End portions of each of the projecting portions  45  function as engaging portions  40  (end portions in this case refer to end portions in the extending direction of the edge of the left cover  20 L (forward-rearward direction)). That is, engaging portions  40  are provided at front ends and rear ends of the projecting portions  45 . 
         [0022]    The right cover  20 R has a plurality of elastically deformable engaging portions  30  arranged along the edge of the right cover  20 R. The engaging portions  30  can be elastically deformed in a direction that intersects the left-right direction and is along the upper surface of the electronic apparatus  1 . In the example described here, the direction along the upper surface of the electronic apparatus  1  is the forward-rearward direction. That is, the engaging portions  30  can be elastically deformed in the forward-rearward direction (extending direction of the edge of the right cover  20 R). The elastic deformation of the engaging portions  30  allows engagement of the engaging portions  30  with the engaging portions  40  of the left cover  20 L and release of the engagement (in the following, the engaging portions  30  will be referred to as first engaging portions, and the engaging portions  40  will be referred to as second engaging portions). 
         [0023]    Two first engaging portions  30  elastically deformed in opposite directions from each other form a pair. Referring to  FIG. 3 , a first engaging portion  30 - 1  and a first engaging portion  30 - 2  form a pair (in the following, this pair will be referred to as an engaging portion pair). The first engaging portion  30 - 1  is elastically deformed in one of two directions parallel with the extending direction of the edge of the right cover  20 R and opposite from each other. The first engaging portion  30 - 2  is elastically deformed in the other of the two directions. Specifically, the first engaging portion  30 - 1  is elastically deformed in a forward direction, and the first engaging portion  30 - 2  is elastically deformed in a rearward direction. The right cover  20 R is provided with a plurality of engaging portion pairs arranged in the forward-rearward direction. 
         [0024]    A plurality of projecting portions  35  arranged in the forward-rearward direction are formed at the edge of the right cover  20 R. The first engaging portion  30 - 1  is provided on a rear side of a projecting portion  35 , and the first engaging portion  30 - 2  is provided on a front side of the projecting portion  35 . In the following, in description in which the first engaging portion  30 - 1  located on the rear side of each projecting portion  35  and the first engaging portion  30 - 2  located on the front side of each projecting portion  35  are not distinguished from each other, these first engaging portions will be referred to simply as first engaging portions  30 . Incidentally, in the example of  FIG. 3 , a first engaging portion  30  located at a foremost position among the plurality of first engaging portions  30  is not provided with a first engaging portion  30  with which to form a pair. 
         [0025]    The position of the projecting portions  45  of the left cover  20 L is shifted with respect to the projecting portions  35  of the right cover  20 R in the forward-rearward direction. Hence, the second engaging portion  40  located on the front side of the projecting portion  45  is engaged with the first engaging portion  30 - 1  on the rear side of the projecting portion  35 . The second engaging portion  40  located on the rear side of the projecting portion  45  is engaged with the first engaging portion  30 - 2  on the front side of the projecting portion  35 . A force in the forward-rearward direction which force the first engaging portion  30 - 1  on the rear side of the projecting portion  35  receives from the second engaging portion  40  and a force in the forward-rearward direction which force the first engaging portion  30 - 2  on the front side of the projecting portion  35  receives from the second engaging portion  40  are in opposite directions from each other. In a state in which the edge of the left cover  20 L and the edge of the right cover  20 R are connected to each other (in a state in which the first engaging portions  30  are engaged with the second engaging portions  40 ), the projecting portions  45  and the projecting portions  35  are located on the lower side of the edges of the covers  20 L and  20 R, and are arranged alternately in the forward-rearward direction (extending direction of the edges). Forces necessary for connecting and separating the left cover  20 L and the right cover  20 R to and from each other can be adjusted by adjusting the number of projecting portions  45  and  35 , the length of the projecting portions  35  in the forward-rearward direction (distance between two first engaging portions  30  provided to the projecting portion  35 ), and the length of the projecting portions  45  in the forward-rearward direction (distance between two second engaging portions  40  provided to the projecting portion  45 ). 
         [0026]    Thus, the first engaging portions  30  are elastically deformed in the forward-rearward direction rather than in the upward-downward direction. Therefore, interference between the first engaging portions  30  and parts covered by the covers  20 R and  20 L can be prevented when the left cover  20 L is connected to the right cover  20 R. In addition, because the right cover  20 R is provided with a plurality of engaging portion pairs, the strength of connection between the right cover  20 R and the left cover  20 L can be improved while the width in the forward-rearward direction of the right cover  20 R and the left cover  20 L is increased. 
         [0027]      FIG. 4  and  FIG. 5  are diagrams of assistance in explaining the engaging structures of the covers  20 R and  20 L. The diagrams show the edges of undersurfaces of the covers  20 R and  20 L.  FIG. 4  shows a state immediately before engaging portions  30  and  40  are engaged with each other.  FIG. 5  shows a state after the engaging portions  30  and  40  are engaged with each other. 
         [0028]    As shown in  FIG. 4 , the first engaging portion  30  has a first elastic inclining portion  31  and a second elastic inclining portion  32 . The first elastic inclining portion  31  has a first abutting surface  31   a  and a second abutting surface  31   b . The first abutting surface  31   a  and the second abutting surface  31   b  are located in a course L1 of movement of the second engaging portion  40  when the left cover  20 L moves relative to the right cover  20 R. The first abutting surface  31   a  is a surface that the second engaging portion  40  abuts against when the left cover  20 L approaches the right cover  20 R (see  FIG. 4 ). The second abutting surface  31   b  is a surface that the second engaging portion  40  abuts against when the left cover  20 L moves in a direction of going away from the right cover  20 R in a state in which the first engaging portion  30  and the second engaging portion  40  are engaged with each other (see  FIG. 5 ). Here, the state in which the first engaging portion  30  and the second engaging portion  40  are engaged with each other is a state in which the edges of the two covers  20 R and  20 L abut against each other, or in other words a state in which a projecting portion  45  is fitted between two projecting portions  35  adjacent to each other. As described above, the end portions of the projecting portions  45  function as second engaging portions  40 . The second engaging portion  40  in the example described here has an abutting portion  40   a , which is an end surface of the projecting portion  45 , and an abutting portion  40   b , which is a corner of the projecting portion  45 . The abutting portion  40   a  abuts against the first abutting surface  31   a  of the first engaging portion  30 , and the abutting portion  40   b  abuts against the second abutting surface  31   b  (see  FIG. 5 ). 
         [0029]    The first elastic inclining portion  31  is formed so as to incline in the forward-rearward direction when the second engaging portion  40  presses the first abutting surface  31   a . Specifically, as indicated by an arrow D1 in  FIG. 4 , the first elastic inclining portion  31  of the first engaging portion  30 - 2  provided on the front side of the projecting portion  35  is formed so as to incline rearward. Conversely, the first elastic inclining portion  31  of the first engaging portion  30 - 1  provided on the rear side of the projecting portion  35  is formed so as to incline forward. The second elastic inclining portion  32  is formed so as to incline in the forward-rearward direction when the second engaging portion  40  presses the second abutting surface  31   b . Specifically, as indicated by an arrow D2 in  FIG. 5 , the second elastic inclining portion  32  of the first engaging portion  30 - 2  provided on the front side of the projecting portion  35  is formed so as to incline rearward. Conversely, the second elastic inclining portion  32  of the first engaging portion  30 - 1  provided on the rear side of the projecting portion  35  is formed so as to incline forward. 
         [0030]    The first engaging portion  30  is thus provided with two elastic inclining portions  31  and  32 . This facilitates adjustment of a balance between a force necessary to engage the engaging portions  30  and  40  with each other and a force necessary to release the engagement as compared with a case where the first engaging portion  30  is provided with only one elastic inclining portion. For example, when the modulus of elasticity of the first elastic inclining portion  31  is decreased while the modulus of elasticity of the second elastic inclining portion  32  is maintained, the force necessary for the engagement can be reduced while a change in the force necessary to release the engagement is prevented. 
         [0031]    The first engaging portion  30  in the example described here is specifically formed as follows. As shown in  FIG. 4 , the second elastic inclining portion  32  has a base portion  32   a  connected to the edge of the right cover  20 R at one end portion of the second elastic inclining portion  32 . The second elastic inclining portion  32  can elastically incline with the base portion  32   a  as a center of inclination. The first elastic inclining portion  31  has a base portion  31   c  connected to another end portion of the second elastic inclining portion  32 . The first elastic inclining portion  31  and the second elastic inclining portion  32  are arranged in substantially the shape of a U. That is, the base portion  31   c  of the first elastic inclining portion  31  is connected to the second elastic inclining portion  32  via a bent portion  33 . In the example described here, the second elastic inclining portion  32  extends in a direction of going away from the edge of the right cover  20 R (left direction), and the first elastic inclining portion  31  extends from the end portion of the second elastic inclining portion  32  toward the edge of the right cover  20 R. The first elastic inclining portion  31  and the second elastic inclining portion  32  are formed so as to be substantially parallel with the flat surface formed by the covers  20 R and  20 L (upper surface of the electronic apparatus  1 ). In the example described here, the second elastic inclining portion  32  extends obliquely with respect to a direction orthogonal to the edge of the right cover  20 R (left-right direction) in an initial state of the second elastic inclining portion  32  (state in which no force acts from the second engaging portion  40  on the abutting surfaces  31   a  and  31   b ). Similarly, the first elastic inclining portion  31  extends obliquely with respect to the direction orthogonal to the edge of the right cover  20 R (left-right direction) in an initial state of the first elastic inclining portion  31  (state in which no force acts from the second engaging portion  40  on the abutting surfaces  31   a  and  31   b ). The first elastic inclining portions  31  of two first engaging portions  30  forming a pair are inclined such that an interval between the first elastic inclining portions  31  is gradually increased toward the edge of the right cover  20 R. Similarly, the second elastic inclining portions  32  of the two first engaging portions  30  forming the pair are inclined such that an interval between the second elastic inclining portions  32  is gradually increased toward the edge of the right cover  20 R. The first elastic inclining portion  31  and the second elastic inclining portion  32  are substantially parallel with each other. 
         [0032]    The first elastic inclining portion  31  has the first abutting surface  31   a  as a side surface on an opposite side from the second elastic inclining portion  32 . The first abutting surface  31   a  is substantially parallel with the extending direction of the first elastic inclining portion  31 . Therefore, as shown in  FIG. 4 , when the second engaging portion  40  presses the first abutting surface  31   a  with a force F1, a moment corresponding to the force F1 occurs around the base portion  31   c  of the first elastic inclining portion  31 . Therefore, the first elastic inclining portion  31  elastically inclines with the base portion  31   c  as a center of inclination. The second engaging portion  40  is formed so as to abut against the first abutting surface  31   a  at a position on an end portion side of the first elastic inclining portion  31 . This can reduce the force necessary to engage the engaging portions  30  and  40  with each other. 
         [0033]    The base portion  32   a  of the second elastic inclining portion  32  is located in substantially the direction of the force F1 with respect to the first abutting surface  31   a . In other words, a straight line perpendicular to the first abutting surface  31   a , which straight line passes through a point of contact between the first abutting surface  31   a  and the second engaging portion  40 , passes through the base portion  32   a . Therefore, the occurrence of a moment around the base portion  32   a  due to the force F1 is prevented. Hence, the force necessary to engage the engaging portions  30  and  40  with each other (force necessary to connect the right cover  20 R and the left cover  20 L to each other) can be adjusted mainly by the length of the first elastic inclining portion  31 , the thickness of the base portion  31   c , and the angle of the first abutting surface  31   a  (angle with the movement course L1). 
         [0034]    The second abutting surface  31   b  is located away from the base portion  32   a  of the second elastic inclining portion  32 . In addition, as shown in  FIG. 5 , the angle of the second abutting surface  31   b  with respect to the movement course L1 is set such that a force F2a perpendicular to a straight line L2 occurs when the second engaging portion  40  presses the second abutting surface  31   b . The straight line L2 connects the base portion  32   a  to a point of contact between the second abutting surface  31   b  and the second engaging portion  40 . The force F2a is a component of a force F2 with which the second engaging portion  40  presses the second abutting surface  31   b , which component is in a direction perpendicular to the straight line L2. Therefore, when the second engaging portion  40  presses the second abutting surface  31   b , a moment around the base portion  32   a  occurs, and thus the second elastic inclining portion  32  elastically inclines as indicated by an arrow D2. Hence, unlike to the force necessary to connect the right cover  20 R and the left cover  20 L to each other, the force necessary to separate the right cover  20 R and the left cover  20 L from each other can be adjusted by a distance from the base portion  32   a  of the second elastic inclining portion  32  to the second abutting surface  31   b , the thickness of the base portion  32   a , and the angle of the second abutting surface  31   b  with respect to the movement course L1. Hence, it becomes easy to adjust a balance between the force necessary to separate the left cover  20 L and the right cover  20 R from each other (force necessary to release the engagement of the engaging portions  30  and  40  with each other) and the force necessary to connect the left cover  20 L and the right cover  20 R to each other (force necessary for the engagement). 
         [0035]    In the example of  FIG. 5 , the angle of the second abutting surface  31   b  with respect to the movement course L1 is set such that a force component F2b occurs when the second engaging portion  40  presses the second abutting surface  31   b . The force component F2b is a component of the force F2. The force component F2b is perpendicular to a straight line L3 connecting a point of contact between the second abutting surface  31   b  and the second engaging portion  40  to the base portion  31   c  of the first elastic inclining portion  31 . This force F2b produces a relatively small moment around the base portion  31   c  of the first elastic inclining portion  31 . Therefore, as will be described in a subsequent example, the engagement of the first engaging portion  30  and the second engaging portion  40  with each other can be released even in a structure without the second elastic inclining portion  32 . 
         [0036]    The projecting portion  45  formed on the left cover  20 L is disposed between two first engaging portions  30  adjacent to each other. The first elastic inclining portion  31  is inclined such that an interval W1 ( FIG. 3 ) in the forward-rearward direction between the first elastic inclining portions  31  of the two first engaging portions  30  adjacent to each other is gradually increased from the end portions of the first elastic inclining portions  31  to the base portions  31   c . Therefore, when the left cover  20 L is connected to the right cover  20 R, the projecting portion  45  is guided by the first elastic inclining portions  31  of the two first engaging portions  30 . In addition, the projecting portion  45  formed on the left cover  20 L has the abutting portion  40   a  at an end surface of the projecting portion  45  (see  FIG. 4  or  FIG. 5 ). The abutting portion  40   a  is inclined such that the width in the forward-rearward direction of the projecting portion  45  decreases toward the right cover  20 R. This facilitates the fitting of the projecting portion  45  between the two first engaging portions  30  when the left cover  20 L is connected to the right cover  20 R. 
         [0037]      FIGS. 6A ,  6 B, and  6 C are sectional views of the right cover  20 R and the left cover  20 L in a state of being connected to each other. The section of  FIG. 6A  is taken along a line a-a of  FIG. 3 . The section of  FIG. 6B  is taken along a line b-b of  FIG. 3 . The section of  FIG. 6C  is taken along a line c-c of  FIG. 3 . Incidentally, in the example described here, as shown in  FIGS. 6A to 6C , the right cover  20 R has a two-layer structure. Specifically, the right cover  20 R has an upper side member  20   a  forming the external surface of the electronic apparatus  1  and a lower side member  20   b  attached to the undersurface of the upper side member  20   a . The projecting portions  35  and the first engaging portions  30  described above are formed in the lower side member  20   b . The upper side member  20   a  and the lower side member  20   b  are different from each other in color, for example. The lower side member  20   b  has a part  20   c  located between the left cover  20 L and the upper side member  20   a . Incidentally, the right cover  20 R may not necessarily have a two-layer structure. 
         [0038]    As shown in  FIG. 6A , the projecting portion  45  is formed on the undersurface of the left cover  20 L. The projecting portion  45  has a section in substantially the shape of an L. The projecting portion  45  extends beyond the edge of the left cover  20 L to the lower side of the right cover  20 R to support the right cover  20 R. As shown in  FIG. 6B , the projecting portion  35  extends beyond the edge of the right cover  20 R to the lower side of the left cover  20 L to support the left cover  20 L. The projecting portions  45  and  35  are formed so as to be parallel with the covers  20 L and  20 R. 
         [0039]    Thus, the projecting portion  35  supports the left cover  20 L on the lower side of the left cover  20 L, and the projecting portion  45  supports the right cover  20 R on the lower side of the right cover  20 R. Therefore, the occurrence of a gap between the two covers  20 R and  20 L can be prevented when the upper side of one of the covers  20 R and  20 L is pressed. In addition, the engaging portions  30  and  40  engaged with each other are located on each of the front side and the rear side of the projecting portions  35  and  45 . This can prevent the occurrence of the gap between the two covers  20 R and  20 L more effectively. 
         [0040]    An attaching portion to be fixed to the main body (frame  50  in the present example) of the electronic apparatus  1  is formed at least one of the plurality of projecting portions  35  provided to the right cover  20 R. In the example shown in  FIG. 3 , attaching portions  35   a  and  35   b  are provided respectively to the projecting portion  35 - 1  located at a center in the forward-rearward direction and the projecting portion  35 - 2  located at the foremost position. The attaching portions  35   a  and  35   b  are fixed to the main body (for example the frame  50 ) of the electronic apparatus  1  by screws  36 . The projecting portions  35 - 1  and  35 - 2  are connected to the attaching portions  35   a  and  35   b  via wall portions  35   c  extending in the upward-downward direction (direction of thickness of the covers  20 R and  20 L) (see  FIG. 6C ). The projecting portions  35 - 1  and  35 - 2  are thereby supported by the wall portions  35   c . Thus, even when the upper side of the covers  20 R and  20 L is pressed, the recessing of the covers  20 R and  20 L can be prevented. In addition, the attaching portions  35   a  and  35   b  are provided to the projecting portions  35 , and are covered by the left cover  20 L. That is, the exposure of the structure for attaching the right cover  20 R to the main body of the electronic apparatus  1  can be prevented. 
         [0041]      FIG. 7  is a perspective view of the rear side of the electronic apparatus  1 .  FIG. 8  is a perspective view of the left cover  20 L as viewed from the lower side. 
         [0042]    The left cover  20 L has an upper surface portion  21  forming the upper surface of the electronic apparatus  1  and having the above-described second engaging portions  40  formed thereon. The left cover  20 L also has a front surface portion  22  forming a front surface (surface connected to the front edge of the upper surface) of the electronic apparatus  1  and a side surface portion  24  (see  FIG. 8 ) forming a side surface (surface connected to the left edge of the upper surface) of the electronic apparatus  1 . Therefore, a larger part is exposed when the left cover  20 L is removed. The work of replacing the hard disk drive  6  is thus facilitated. In the present example, in particular, the left cover  20 L also has a rear surface portion  23  (see  FIG. 7 ) forming a rear surface (surface connected to the rear edge of the upper surface) of the electronic apparatus  1 . That is, the left cover  20 L has the shape of a box with a lower surface and a right side surface opened. This further facilitates the work of replacing the hard disk drive  6 . 
         [0043]    As shown in  FIG. 8 , a plurality of engaging portions  24   a  (three engaging portions  24   a  in  FIG. 8 ) and a plurality of positioning portions  24   b  (two positioning portions  24   b  in  FIG. 8 ) are formed on the internal surface of the side surface portion  24  (engaging portions  24   a  will hereinafter be referred to as third engaging portions). The third engaging portions  24   a  and the positioning portions  24   b  project to the inside from the side surface portion  24 . The third engaging portions  24   a  are engaged with the frame  50 . Specifically, the frame  50  has a left and a right side wall portion  51  (see  FIG. 2 ). The left and right side wall portions  51  have a projecting portion  51   a  projecting to the outside in the left-right direction. The side surface portion  24  of the left cover  20 L is disposed along the projecting portion  51   a  of the left side wall portion  51 . The third engaging portions  24   a  are engaged with an upper edge of the projecting portion  51   a . The third engaging portions  24   a  in the example of  FIG. 8  are formed so as to be elastically deformable in the upward-downward direction. The projecting portion  51   a  of the frame  50  has holes at positions corresponding to the positioning portions  24   b . The holes correspond to the size of the positioning portions  24   b . The rattling of the side surface portion  24  can be prevented by fitting the positioning portions  24   b  into the holes. By moving the left cover  20 L toward the right cover  20 R in the right direction, the second engaging portions  40  are engaged with the first engaging portions  30 , the third engaging portions  24   a  are engaged with the upper edge of the projecting portion  51   a , and the positioning portions  24   b  are fitted into the holes formed in the frame  50 . 
         [0044]    As described above, the second engaging portions  40  formed on the upper surface portion  21  are engaged with the right cover  20 R fixed to the main body (frame  50 ) of the electronic apparatus  1 , and the engaging portions  24   a  formed on the side surface portion  24  are engaged with the main body (frame  50 ) of the electronic apparatus  1 . Such a layout of the engaging portions  40  and  24   a  can reduce the number of fixtures (for example screws) for fixing the left cover  20 L. In the example described here, fixtures such as screws or the like are not used to fix the left cover  20 L. Hence, the user can remove the left cover  20 L by releasing the engagement of the engaging portions  30  and  40  with each other and the engagement of the third engaging portions  24   a  and the frame  50  with each other. 
         [0045]    Incidentally, as shown in  FIG. 7 , the lower cover  60  and the right cover  20 R also have respective rear surface portions  61  and  25  forming the rear surface of the electronic apparatus  1 . Unlike the left cover  20 L, the lower cover  60  and the right cover  20 R are fixed to the main body of the electronic apparatus  1  by fixtures such as screws or the like. In the example described here, attaching holes  61   b  into which to insert screws for fixing the rear surface portion  61  of the lower cover  60  to the frame  50  are formed in the rear surface portion  61 . An attaching hole  25   b  into which to insert a screw for fixing the rear surface portion  25  of the right cover  20 R to the frame  50  is formed in the rear surface portion  25 . 
         [0046]    As shown in  FIG. 7 , a plurality of openings  61   a  for exposing exhaust holes P of the electronic apparatus  1  are formed in the rear surface portion  61  of the lower cover  60 . A plurality of openings  25   a  for exposing connectors  8   c  to  8   f  provided to the rear surface of the electronic apparatus  1  are formed in the rear surface portion  25  of the right cover  20 R. A plurality of openings  23   a  are also formed in the rear surface portion  23  of the left cover  20 L. The openings  23   a  may not necessarily be formed. 
         [0047]      FIG. 9  is a diagram showing a modification of the first engaging portion  30 .  FIG. 9  shows a state in which a first engaging portion  130  is engaged with the second engaging portion  40 . 
         [0048]    Unlike the above-described first engaging portions  30 , the first engaging portion  130  does not have the second elastic inclining portion  32 . A base portion  131   c  of a first elastic inclining portion  131  is connected to an end portion in the forward-rearward direction of the projecting portion  35 . The first elastic inclining portion  131  extends from the projecting portion  35  toward the edge of the right cover  20 R. The first elastic inclining portion  131  has the first abutting surface  31   a  and the second abutting surface  31   b  described above. 
         [0049]    When the second engaging portion  40  presses the first abutting surface  31   a , a moment corresponding to the force occurs around the base portion  131   c  of the first elastic inclining portion  131 . Therefore, the first elastic inclining portion  131  elastically inclines with the base portion  131   c  as a center of inclination. As described above, the angle of the second abutting surface  31   b  is set such that a force component F2b occurs when the second engaging portion  40  presses the second abutting surface  31   b . This force F2b produces a moment around the base portion  131   c  of the first elastic inclining portion  131 . Therefore, the first elastic inclining portion  131  elastically inclines with the base portion  131   c  as a center of inclination also when the second engaging portion  40  presses the second abutting surface  31   b.    
         [0050]    The second abutting surface  31   b  is formed such that the force necessary to connect the right cover  20 R and the left cover  20 L to each other (force necessary to engage the second engaging portion  40  and the first engaging portion  130  with each other) is smaller than the force necessary to separate the right cover  20 R and the left cover  20 L from each other (force necessary to release the engagement). Let θ1 be an angle formed between a straight line connecting a point of contact between the first abutting surface  31   a  and the second engaging portion  40  to the base portion  131   c  of the first elastic inclining portion  131  and a line perpendicular to the first abutting surface  31   a . Let θ2 be an angle formed between a straight line connecting a point of contact between the second abutting surface  31   b  and the second engaging portion  40  to the base portion  131   c  of the first elastic inclining portion  131  and a line perpendicular to the second abutting surface  31   b . The second abutting surface  31   b  is formed such that the angle θ2 is smaller than the angle θ1. This can make the force necessary to connect the right cover  20 R and the left cover  20 L to each other smaller than the force necessary to separate the right cover  20 R and the left cover  20 L from each other. 
         [0051]    As described above, the electronic apparatus  1  has the right cover  20 R and the left cover  20 L forming the upper surface of the electronic apparatus  1 . The right cover  20 R has, at an edge thereof, a plurality of engaging portion pairs including two first engaging portions  30  or  130  that are elastically deformed in opposite directions from each other. The first engaging portions  30  or  130  can be elastically deformed in a direction along the upper surface of the electronic apparatus  1 , specifically the forward-rearward direction. The left cover  20 L has a plurality of second engaging portions  40  at an edge of the left cover  20 L. The second engaging portions  40  can be engaged with the first engaging portions  30  or  130 . According to the electronic apparatus  1 , a plurality of engaging portion pairs are provided at the edge of the right cover  20 R, and therefore stability of connection of the two covers can be ensured. In addition, because the first engaging portions are elastically deformed in the second direction along the first external surface, interference between parts included in the electronic apparatus and the engaging structures of the two covers can be prevented. 
         [0052]    It is to be noted that the present technology is not limited to the electronic apparatus  1  described above, but is susceptible of various changes. 
         [0053]    For example, the projecting portions  35  may not necessarily be formed on the right cover  20 R. 
         [0054]    In addition, the shape of the first engaging portions  30  is not limited to the above-described shape. For example, the base portion of the second elastic inclining portion  32  may be connected to the projecting portion  35 . Then, the second elastic inclining portion  32  may extend toward the edge of the right cover  20 R, and the first elastic inclining portion  31  may extend from an end portion of the second elastic inclining portion  32  in a direction of going away from the edge of the right cover  20 R. That is, the first engaging portion  30  may have substantially the shape of a U opened in the direction of going away from the edge of the right cover  20 R. 
         [0055]    The first engaging portions  30  may be formed on the left cover  20 L, and the second engaging portions  40  may be formed on the right cover  20 R. 
         [0056]    A screw may be used to fix the left cover  20 L. 
         [0057]    The left cover  20 L may not have the front surface portion  22 , the side surface portion  24 , or the rear surface portion  23 . 
         [0058]    The present disclosure contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2013-121342 filed in the Japan Patent Office on Jun. 7, 2013, the entire content of which is hereby incorporated by reference. 
         [0059]    It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.