Abstract:
An electronic device includes a housing defining an interior space with an opening, a lid, a first locking member, a restricting member, and a second locking member. The lid is coupled to the housing to close and unclose the opening. The first locking member is coupled to the lid and movable in a first direction between a closed position to lock the lid over the opening and an open position to unlock the lid from over the opening. The restricting member is mounted to the lid and movable between a restricting position to prevent the first locking member from moving to the open position and a retracted position to permit the first locking member to move to the open position. The second locking member is coupled to the lid and movable in the first direction to allow the restricting member to switch between the restricting position and the retracted position.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2010-032199, filed on Feb. 17, 2010. The entire disclosures of Japanese Patent Applications No. 2010-032199 is hereby incorporated herein by reference. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The technology disclosed herein relates to an electronic device. 
         [0004]    2. Background Information 
         [0005]    Most electronic devices comprise a holding component that holds a battery or the like, and a lid that closes the holding component. The holding component usually accommodates a memory card or other such storage medium in addition to a battery. 
         [0006]    With an electronic device such as this, however, if the lid is unintentionally opened during operation, the battery may fall out and the electronic device cease to operate. For example, if the electronic device is producing, editing, or recording data, it is possible that the data will be deleted or corrupted. 
         [0007]    Also, if the electronic device is equipped with a waterproofing function, some way to prevent the lid from accidentally opening is essential. Furthermore, digital cameras on the market today can sometimes be used in the ocean to depths ranging from a few meters to about 10 meters, even though the case is not equipped with any waterproofing function such as a marine case. With a digital camera such as this, if the lid should open in the water, it could lead to malfunctioning of the digital camera itself. 
         [0008]    In view of this, a lid locking mechanism has been proposed in order to prevent a lid from coming open accidentally (see Japanese Laid-Open Patent Application JP2006-50254, for example). 
         [0009]    A lock lever that slides at a right angle to the sliding direction of the lid is installed in the electronic device described in JP2006-50254. 
         [0010]    With the electronic device described in JP2006-50254, however, since the lock lever is disposed so as to slide at a right angle to the sliding direction of the lid, the portion that engages with the lock lever must be formed relatively long in the direction in which the lock lever moves. Therefore, the lid becomes larger in the sliding direction of the lock lever. A larger lid is undesirable because it leads to a bulkier electronic device. 
       SUMMARY 
       [0011]    One object of the invention is to provide an electronic device in which accidental opening of a lid can be prevented while keeping the size of the electronic device to a minimum. 
         [0012]    In accordance with one aspect of the invention, an electronic device is provided that includes a housing defining an interior space with an opening to access the interior space, a lid, a first locking member, a restricting member, and a second locking member. The lid is coupled to the housing to close and unclose the opening. The first locking member is coupled to the lid and movable in a first direction between a closed position to lock the lid over the opening and an open position to unlock the lid from over the opening. The restricting member is mounted to the lid and movable between a restricting position to prevent the first locking member from moving to the open position and a retracted position to permit the first locking member to move to the open position. The second locking member is coupled to the lid and movable in the first direction to allow the restricting member to switch between the restricting position and the retracted position. 
         [0013]    Thus, with this electronic device, the lid is prevented from being accidentally unlocked, while a more compact size can be attained. 
         [0014]    These and other objects, features, aspects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses embodiments of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0015]    Referring now to the attached drawings which form a part of this original disclosure: 
           [0016]      FIG. 1A  is a rear view of a digital camera,  FIG. 1B  is a front view of a digital camera, and  FIG. 1C  is a bottom view of a digital camera; 
           [0017]      FIGS. 2A to 2D  are diagrams illustrating the operation of opening the lid; 
           [0018]      FIG. 3  is a cross section of a lid locking mechanism; 
           [0019]      FIG. 4  is a cross section of the main parts of a lid locking mechanism; 
           [0020]      FIG. 5A  is a plan view of a lid locking mechanism (second embodiment), and  FIG. 5B  is a cross section of a lid locking mechanism (second embodiment); 
           [0021]      FIG. 6A  is a cross section of a lid locking mechanism (second embodiment), and  FIG. 6B  is an oblique view of a second lock lever; 
           [0022]      FIG. 7  is a simplified diagram of the disposition of a slide knob and a lock lever (another embodiment); 
           [0023]      FIGS. 8A and 8B  are simplified diagrams of a second lock lever and a restricting member (another embodiment); and 
           [0024]      FIGS. 9A and 9B  are simplified diagrams of a second lock lever and a restricting member (another embodiment). 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0025]    Selected embodiments will now be explained with reference to the drawings. It will be apparent to those skilled in the art from this disclosure that the following descriptions of the embodiments are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents. 
       First Embodiment 
     1: Configuration of Digital Camera 
       [0026]    A digital camera  100  pertaining to a first embodiment will be described through reference to  FIGS. 1A to 4C . To facilitate the description, a three-dimensionally perpendicular coordinate system is set up for the digital camera  100 . The X axis is set parallel to the left and right direction when the digital camera  100  is used. The Y axis is set parallel to the optical axis AX of the digital camera  100 . The Z axis is set parallel to the up and down direction (vertical direction) when the digital camera  100  is used. In the following description, the X axis direction shall be a direction parallel to the X axis, and is an example of a first direction. The Y axis direction shall be a direction parallel to the Y axis. The Z axis direction shall be a direction parallel to the Z axis. The left side facing the subject shall be termed the X axis direction positive side. The subject side in the Y axis direction shall be termed the Y axis direction positive side. The upper side along the Z axis direction shall be termed the Z axis direction positive side. 
         [0027]    The vertically upper side (Z axis direction positive side) in the normal orientation of the digital camera  100  (hereinafter also referred to as the landscape orientation) is also called the top, and the vertically lower side (Z axis direction negative side) the bottom, but these expressions do not serve to limit the usage state of the digital camera  100 . 
         [0028]    As shown in  FIGS. 1A to 1C , the digital camera  100  (an example of an electronic device) comprises an optical system  110 , a strobe  111 , a manipulation unit  130 , a body  120  (an example of a housing), a lid  200  (an example of a lid), and a lid locking mechanism  140 . 
         [0029]    As shown in  FIG. 1B , the optical system  110  is disposed on the front face of the digital camera  100 , and leads light to an imaging element (not shown). The optical system  110  has an optical axis AX. The strobe  111  is provided to the front face of the digital camera  100  to make imaging possible in dark locations. For example, the digital camera  100  employs an auto-focus function that automatically adjusts the focus on a particular subject. An AF auxiliary light generator  112  is provided so that the auto-focus function can operate properly even in dark locations. 
         [0030]    As shown in  FIG. 1A , the manipulation unit  130  has a power button  101 , a mode dial  102 , a liquid crystal monitor  103 , a shutter button  104 , a moving picture button  105 , a reproduction button  106 , a cross key  107 , a quick menu button  108 , and a display button  109 . The manipulation unit  130  is provided on the front and rear faces of the body  120 . 
         [0031]    When the power button  101  is pressed, power is supplied to the digital camera  100 . The desired imaging mode can be selected by turning the mode dial  102 . Since the subject is displayed on the liquid crystal monitor  103 , the user can compose a picture while looking at the subject displayed on the liquid crystal monitor  103 . When the shutter button  104  is pressed, a still picture can be captured. When the moving picture button  105  is pressed, a moving picture can be captured. When the reproduction button  106  is pressed, a captured still or moving picture can be reproduced on the liquid crystal monitor  103 . 
         [0032]    When the cross key  107  is pressed, various settings can be made for imaging or reproduction. In addition to showing directions, the various buttons that make up the cross key  107  may also be assigned individual functions. For instance, in addition to showing the upward direction, the up button cross key  107  may also be assigned the function of exposure correction. Also, a menu button  107   a  is provided in the center of the cross key  107 . When this menu button  107   a  is pressed, a setting menu screen is displayed on the liquid crystal monitor  103 . 
         [0033]    When the quick menu button  108  is pressed, some of the settings can be easily changed. The quick menu button  108  also functions as a delete button for deleting captured still or moving pictures. 
         [0034]    When the display button  109  is pressed, the information displayed on the liquid crystal monitor  103  is switched. Imaging information, guidelines that assist in composing a picture, and so forth are displayed on the liquid crystal monitor  103 . 
         [0035]    The body  120  includes the shell or frame of the digital camera  100 , and has a holding unit  300 . A battery  301  and a memory card  302  are removably held in the holding unit  300 . The holding unit  300  has an opening  220  (an example of an opening). The opening  220  has a substantially rectangular shape that extends in the X axis direction. The opening  220  is formed in the bottom face of the body  120 . An attachment screw hole  113  for fixing a tripod or monopod to the digital camera  100  is provided to the bottom face of the body  120 . The lid  200  is mounted to the bottom face of the body  120 . 
         [0036]    The lid  200  (an example of a lid) is coupled to a camera body  230  so that the opening  220  can be opened and closed. More specifically, a hinge  203  is provided to the edge of the opening  220 , and the lid  200  is rotatably coupled by the hinge  203  to the camera body  230 . Since the opening  220  is longer in the X axis direction, the lid  200  also has a substantially rectangular shape that is longer in the X axis direction. In this embodiment, the lid  200  rotates around a rotational axis A, but does not slide in the X axis direction with respect to the body  120 . The hinge  203  is disposed at a closer corner of the digital camera  100  to the bottom face. 
         [0037]    As shown in  FIG. 2D , a gasket  204  is mounted to the rear face of the lid  200  to prevent liquids or dust from penetrating through the gap formed between the lid  200  and the opening  220 . When the lid  200  is opened, the battery  301  and the memory card  302  held in the holding unit  300  can be seen. The battery  301  and the memory card  302  can be installed or removed as needed. 
         [0038]    Meanwhile, the lid locking mechanism  140  is built into the lid  200  to lock the lid  200  in a closed state with respect to the body  120 . The configuration of the lid locking mechanism  140  will now be described. 
       2: Configuration of Lid Locking Mechanism  140   
       [0039]    More specifically, as shown in  FIG. 3 , the lid locking mechanism  140  has a first lock lever  201  (an example of a first locking member), a leaf spring  205  (an example of a restricting member), and a second lock lever  202  (an example of a second locking member). 
         [0040]    2.1: First Lock Lever  201   
         [0041]    The first lock lever  201  is provided to lock the lid  200  in a closed state, and is supported by the lid  200  movably in the X axis direction. As shown in  FIGS. 3 and 4A  to  4 C, the first lock lever  201  is disposed movably between a closed position P 11  (an example of a closed position), in which the lid  200  is locked in a closed state with respect to the opening  220 , and an open position P 12  (an example of an open position), in which the lid  200  is unlocked with respect to the opening  220 . The closed position P 11  and open position P 12  use as a reference the end face of the first lock lever  201  that is near the leaf spring  205 . 
         [0042]    As shown in  FIG. 3 , the first lock lever  201  has a lock lever main body  201   c , a lock pawl  201   a , and a knob  201   b . The lock lever main body  201   c  has a substantially plate-like shape that extends in the X axis direction, and is disposed so as to be able to come into contact with the leaf spring  205 . 
         [0043]    The lock pawl  201   a  protrudes in a B direction from the lock lever main body  201   c . The opening  220  has a protrusion  303  provided so as to be able to come into contact with the lock pawl  201   a . If the first lock lever  201  is disposed at the closed position P 11  with the lid  200  in its closed state, the lock pawl  201   a  catches the hinge  203 . At this point the gasket  204  is compressed between the lid  200  and the edge of the opening  220 , so the lock pawl  201   a  is pressed against the protrusion  303  by the elastic force of the gasket  204 . Consequently, the lid  200  can be locked in its closed state. Meanwhile, when the first lock lever  201  is disposed at the open position P 12 , the lock pawl  201   a  does not catch the protrusion  303 , so the lid  200  can be opened. 
         [0044]    The knob  201   b  is provided to make operation easier for the user, and protrudes from the lock lever main body  201   c . The knob  201   b  is disposed at substantially the center position of the lock lever main body  201   c . The first lock lever  201  can be slid by operating the knob  201   b.    
         [0045]    2.2: Leaf Spring  205   
         [0046]    The leaf spring  205  is provided to restrict the first lock lever  201  from moving to the open position P 12 , and is mounted to the lid  200  so as to be capable of elastic deformation in the Z axis direction. The leaf spring  205  extends in a slender shape in the X axis direction, and is disposed along the rear face  200   a  of the lid  200 . The direction in which the leaf spring  205  extends coincides with the lengthwise direction of the digital camera  100 . The leaf spring  205  is made of metal, for example. 
         [0047]    The leaf spring  205  is disposed movably between a restricting position P 21  (an example of a restricting position), at which movement of the first lock lever  201  to the open position P 12  is restricted, and a retracted position P 22  (an example of a retracted position), at which movement of the first lock lever  201  to the open position P 12  is permitted. Switching the leaf spring  205  between the restricting position P 21  and the retracted position P 22  is performed by the second lock lever  202 . 
         [0048]    The leaf spring  205  has a first end  205   b  (an example of a first end) fixed to the lid  200 , and a second end  205   c  (an example of a second end) capable of coming into contact with the first lock lever  201 . The first end  205   b  is disposed at a position farther away from the first lock lever  201  than the second end  205   c . The second end  205   c  is disposed movably to the restricting position P 21  and the retracted position P 22 , with the first end  205   b  serving as a fulcrum. In this embodiment, the restricting position P 21  and the retracted position P 22  are disposed aligned in the Z axis direction, and the restricting position P 21  is closer to the second lock lever  202  than the retracted position P 22 . 
         [0049]    The leaf spring  205  is disposed at the restricting position P 21  in its free state. Therefore, when the leaf spring  205  is guided by the second lock lever  202  to the retracted position P 22 , the leaf spring  205  bends overall and tries to return to the restricting position P 21 . 
         [0050]    Also, the leaf spring  205  has a convex part  205   a  (an example of a restrictor, and an example of a convex part) disposed around the second end  205   c . The convex part  205   a  protrudes to the second lock lever  202  side, and is formed so as to bend the leaf spring  205 . As the leaf spring  205  is guided by the second lock lever  202 , the convex part  205   a  slides with a guide portion  202   c  of the second lock lever  202 . The convex part  205   a  restricts the movement of the second lock lever  202  in the X axis direction. 
         [0051]    2.3: Second Lock Lever  202   
         [0052]    The second lock lever  202  is provided in order to lock the first lock lever  201  at the closed position P 11 , and is supported by the lid  200  movably in the X axis direction. The second lock lever  202  is disposed so as to be able to switch the position of the leaf spring  205  between the restricting position P 21  and the retracted position P 22 . More specifically, the second lock lever  202  is disposed movably between a locked position P 31  (an example of a first position), at which the leaf spring  205  is guided to the restricting position P 21 , and an unlocked position P 32  (an example of a second position), at which the leaf spring  205  is guided to the retracted position P 22 . In this embodiment, the locked position P 31  is disposed closer to the first lock lever  201  than the unlocked position P 32 . 
         [0053]    The second lock lever  202  has a lever main body  202   b  and the guide portion  202   c  (an example of a guide portion). The lever main body  202   b  is provided in order to make operation easier for the user, and has a substantially plate-like shape. 
         [0054]    The guide portion  202   c  protrudes from the lever main body  202   b  toward the leaf spring  205 , and is provided slidably with the leaf spring  205 . The guide portion  202   c  guides the leaf spring  205  between the restricting position P 21  and the retracted position P 22 . More specifically, the guide portion  202   c  has a concave part  202   a  and a support face  202   d . The concave part  202   a  (an example of a concave part) is recessed more to the lever main body  202   b  side than the support face  202   d.    
         [0055]    When the second lock lever  202  is disposed at the locked position P 31 , the convex part  205   a  of the leaf spring  205  is fitted into the concave part  202   a , and the leaf spring  205  is held at the restricting position P 21 . Since the convex part  205   a  is fitted into the concave part  202   a , movement of the second lock lever  202  in the X axis direction is restricted by the convex part  205   a.    
         [0056]    When the second lock lever  202  moves from the locked position P 31  to the unlocked position P 32 , the leaf spring  205  is guided from the restricting position P 21  to the retracted position P 22 . When the second lock lever  202  is disposed at the unlocked position P 32 , the support face  202   d  comes into contact with the convex part  205   a , and the guide portion  202   c  holds the leaf spring  205  at the retracted position P 22 . In this way the second end  205   c  is guided by the second lock lever  202  to the restricting position P 21  and the retracted position P 22 . 
         [0057]    When the second end  205   c  is disposed at the retracted position P 22 , a space D is formed between the leaf spring  205  and the second lock lever  202 . The end of the first lock lever  201  can be inserted into this space D. Therefore, in a state in which the leaf spring  205  is disposed at the retracted position P 22 , the first lock lever  201  can move to the open position P 12 , and the lid  200  can be opened. 
         [0058]    On the other hand, when the second lock lever  202  moves from the unlocked position P 32  to the locked position P 31 , the leaf spring  205  is guided from the retracted position P 22  to the restricting position P 21 . When the second lock lever  202  is disposed at the locked position P 31 , the leaf spring  205  is held at the restricting position P 21 . As shown in  FIG. 3 , in this state the size Si of the gap formed between the leaf spring  205  and the first lock lever  201  is smaller than the size S 2  of the portion of the lock pawl  201   a  that overlaps the protrusion  303 . Accordingly, the first lock lever  201  cannot be moved to the open position P 12 , and the lid  200  is securely locked in a closed state. 
         [0059]    The convex part  205   a  and the guide portion  202   c  have mutually complementary shapes. More specifically, the guide portion  202   c  has the concave part  202   a  that is recessed so as to accept the convex part  205   a . The convex part  205   a  of the leaf spring  205  can be fitted into the concave part  202   a . When the second lock lever  202  is disposed at the locked position P 31 , the convex part  205   a  is fitted into the concave part  202   a  in a state in which the leaf spring  205  is disposed at the restricting position P 21 . Consequently, the second lock lever  202  can be held at the locked position P 31 . 
         [0060]    As shown in  FIGS. 4A to 4C , part of the first lock lever  201  (more precisely, the closer end of the lock lever main body  201   c  to the leaf spring  205 ) is disposed in a movement region  201 R of the leaf spring  205 . In other words, part of the leaf spring  205  (more precisely, the second end  205   c  of the leaf spring  205 ) is disposed in a movement range  205 R of the first lock lever  201 . 
         [0061]    The direction in which the first lock lever  201  moves from the open position P 12  to the closed position P 11  is the B direction. Also, the direction in which the second lock lever  202  moves from the unlocked position P 32  to the locked position P 31  is the B direction. Therefore, the direction in which the first lock lever  201  moves from the open position P 12  to the closed position P 11  is the same as the direction in which the second lock lever  202  moves from the unlocked position P 32  to the locked position P 31 . 
         [0062]    The second lock lever  202  is disposed at a position where there is no interference with the first lock lever  201 , but when viewed in the Z axis direction, the movement region  201 R of the first lock lever  201  overlaps a movement region  202 R of the second lock lever  202 . 
       3: Operation 
       [0063]    3.1: Basic Procedure 
         [0064]    In the state shown in  FIG. 2A , the first lock lever  201  is disposed at the closed position P 11 , and the second lock lever  202  is disposed at the locked position P 31 . The basic procedure in opening the lid  200  from this state is as follows. 
         [0065]    (A1) The second lock lever  202  is slid in the C direction from the locked position P 31  to the unlocked position P 32  ( FIG. 2B ). 
         [0066]    (A2) The first lock lever  201  is slid in the C direction from the closed position P 11  to the open position P 12  ( FIG. 2C ). 
         [0067]    (A3) The lid  200  is opened ( FIG. 2D ). 
         [0068]    Also, the basic procedure when closing and locking the lid  200  from the state shown in  FIG. 2D  is the reverse operation of A1 to A3 above, as discussed below. 
         [0069]    (B1) The lid  200  is closed ( FIG. 2C ). 
         [0070]    (B2) The first lock lever  201  is slid in the B direction from the open position P 12  to the closed position P 11 . 
         [0071]    (B3) The second lock lever  202  is slid in the B direction from the unlocked position P 32  to the locked position P 31 . 
         [0072]    3.2: Detailed Operation 
         [0073]    The operation of the lid locking mechanism  140  will be described. Here, the operation of the lid locking mechanism  140  when opening the lid  200  will be described. 
         [0074]    In the state shown in  FIG. 2A  and  FIG. 4A , the first lock lever  201  is disposed at the closed position P 11 , and the second lock lever  202  is disposed at the locked position P 31 . In this state, the lock pawl  201   a  of the first lock lever  201  is caught by the protrusion  303  of the opening  220 . Furthermore, since the second end  205   c  of the leaf spring  205  is held at the restricting position P 21  by the second lock lever  202 , even if an attempt is made to move the first lock lever  201  in the C direction, the first lock lever  201  will come into contact with the leaf spring  205 . 
         [0075]    Here, as mentioned above, the size Si of the gap formed between the leaf spring  205  and the first lock lever  201  is smaller than the size S 2  of the portion of the lock pawl  201   a  that overlaps the protrusion  303 , so even if the first lock lever  201  is moved until it hits the leaf spring  205 , the state of the lock pawl  201   a  being caught by the protrusion  303  can be maintained. Therefore, the lid  200  can be prevented from opening accidentally. 
         [0076]    In the state shown in  FIG. 4A , since the convex part  205   a  of the leaf spring  205  is fitted into the concave part  202   a  of the guide portion  202   c , movement of the second lock lever  202  in the X axis direction is restricted by the leaf spring  205 . Consequently, the second lock lever  202  can be prevented from sliding accidentally to the unlocked position P 32 . 
         [0077]    When just the second lock lever  202  is slid in the C direction from the state shown in  FIG. 4A , the second lock lever  202  moves from the locked position P 31  to the unlocked position P 32 . As a result, the leaf spring  205  is guided by the second lock lever  202  from the restricting position P 21  to the retracted position P 22 . More specifically, when the second lock lever  202  is slid from the locked position P 31  to the unlocked position P 32 , the convex part  205   a  is guided by the inner face of the concave part  202   a  to the Z axis direction positive side (the lower side in  FIG. 4A ), and the convex part  205   a  reaches the support face  202   d  of the guide portion  202   c . At this point the convex part  205   a  is pushed to the Z axis direction positive side by the guide portion  202   c , and the second end  205   c  moves from the restricting position P 21  to the retracted position P 22 . As a result, the space D is formed between the leaf spring  205  and the second lock lever  202  ( FIG. 4B ). 
         [0078]    Since the end of the first lock lever  201  can be inserted into the space D, the first lock lever  201  can be slid from the closed position P 11  to the open position P 12 . When the first lock lever  201  is moved in the C direction in the state shown in  FIG. 4B , the lock pawl  201   a  of the first lock lever  201  is no longer caught by the protrusion  303  ( FIG. 4C ). As a result, the lid  200  can be opened as shown in FIG.  2 D. 
         [0079]    In the transition from the state shown in  FIG. 2C  to the state shown in  FIG. 2D , the lid  200  may be held open by hand, or a coil spring (not shown) may be mounted to the hinge  203 , for example, so that the lid  200  will open automatically when the first lock lever  201  is moved to the open position P 12 . 
       4: Features 
       [0080]    4.1: As described above, when the first lock lever  201  is disposed at the closed position P 11 , the lid  200  is locked in its closed state with respect to the opening  220 . If at this point the second lock lever  202  is used to switch the leaf spring  205  to the restricting position P 21 , movement of the first lock lever  201  to the open position P 12  will be restricted by the leaf spring  205 . Therefore, the lid  200  can be prevented from being accidentally unlocked. 
         [0081]    Also, since the first lock lever  201  and the second lock lever  202  are disposed movably in the X axis direction (an example of the first direction), the size can be reduced in the Y axis direction or Z axis direction (an example of a direction perpendicular to the first direction). 
         [0082]    Thus, with this digital camera  100 , the lid  200  can be prevented from being accidentally unlocked, while a smaller size can also be achieved. 
         [0083]    4.2: Since the leaf spring  205  extends in a slender shape in the X axis direction, the stiffness of the leaf spring  205  in the X axis direction is high. Accordingly, when movement of the first lock lever  201  is restricted by the leaf spring  205 , a relatively strong force can be received by the leaf spring  205 . 
         [0084]    4.3: When the leaf spring  205  is disposed at the restricting position P 21 , movement of the second lock lever  202  in the X axis direction is restricted by the convex part  205   a , so it is easier to maintain a state in which the leaf spring  205  is held at the restricting position P 21 . Therefore, accidental unlocking of the lid  200  can be reliably prevented. 
         [0085]    4.4: Providing the convex part  205   a  and the concave part  202   a  provides the user with a nice clicking feel when sliding the second lock lever  202 . Consequently, this reassures the user that the lid  200  has been completed locked. 
       Second Embodiment 
       [0086]    In the first embodiment above, the second end  205   c  of the leaf spring  205  moves in the Z axis direction, but a constitution is also possible in which the second end  205   c  moves in the Y axis direction. Components having substantially the same function as those in the first embodiment will be numbered the same here, and will not be described again in detail. 
         [0087]    As shown in  FIGS. 5A and 5B , with the digital camera  100  pertaining to the second embodiment, the restricting position P 21  and the retracted position P 22  are aligned in the Y axis direction. A leaf spring  255  (an example of a restrictor) is guided by a second lock lever  252  (an example of a second locking member) to the restricting position P 21  and the retracted position P 22 . Just as in the first embodiment, the leaf spring  255  is disposed at the restricting position P 21  in its free state. 
         [0088]    The first lock lever  201  and the second lock lever  252  are supported by the lid  200  movably in the X axis direction. The second lock lever  252  has a lever main body  202   b  and a guide portion  252   c . The guide portion  252   c  has basically the same constitution as the guide portion  202   c , but differs in its positional relation to the leaf spring  255 . More specifically, as shown in  FIG. 5A , the guide portion  252   c  is disposed on the Y axis direction negative side of the leaf spring  255 . The guide portion  252   c  has a concave part  252   a  and a support face  252   d . When the second lock lever  252  is disposed at the locked position P 31 , a convex part  255   a  of the leaf spring  255  is fitted into the concave part  252   a.    
         [0089]    The leaf spring  255  has basically the same constitution as the leaf spring  205 , but the second end  205   c  is disposed so as to move in the Y axis direction. The second end  205   c  is guided by the second lock lever  252  to the restricting position P 21  and the retracted position P 22 . 
         [0090]    The same effect can be obtained with this constitution as with the digital camera  100  pertaining to the first embodiment. 
       Third Embodiment 
       [0091]    In the first embodiment above, the restricting position P 21  was closer to the second lock lever  202  than the retracted position P 22 , but a constitution is also possible in which the retracted position P 22  is closer to the second lock lever  202  than the restricting position P 21 . 
         [0092]    As shown in  FIGS. 6A and 6B , with the digital camera  100  pertaining to the third embodiment, the leaf spring  205  is guided by a second lock lever  262  (an example of a second locking member) to the restricting position P 21  and the retracted position P 22 . More specifically, the second lock lever  262  has a lever main body  202   b  and a guide portion  262   c . The guide portion  262   c  has a plate portion  262   e  that protrudes in the Z axis direction from the lever main body  202   b , and a guide pin  262   f  that protrudes in the Y axis direction from the plate portion  262   e . When the leaf spring  205  is disposed at the restricting position P 21 , the guide pin  262   f  is fitted into the recess on the rear side of the convex part  205   a  of the leaf spring  205 . When the second lock lever  262  is slid from the locked position P 31  to the unlocked position P 32 , the leaf spring  205  is pushed by the guide pin  262   f  to the Z axis direction negative side and guided to the retracted position P 22 . In this state, the space D is formed on the X axis direction negative side of the first lock lever  201 , so the first lock lever  201  can be moved to the open position P 12 . 
         [0093]    When the second lock lever  262  is slid from the unlocked position P 32  to the locked position P 31 , the leaf spring  205  is guided by the second lock lever  262  to the restricting position P 21 . More specifically, when the second lock lever  262  is slid from the unlocked position P 32  to the locked position P 31 , the guide pin  262   f  is fitted into the recess on the rear side of the convex part  205   a , so the leaf spring  205  is returned to the restricting position P 21  by elastic force. Also, since the guide pin  262   f  is fitted into the recess on the rear side of the convex part  205   a , the second lock lever  262  is held at the locked position P 31  by the leaf spring  205 . The guide portion  262   c  and the convex part  205   a  have mutually complementary shapes. 
         [0094]    Again with this constitution, the same effect can be obtained as with the digital camera  100  pertaining to the first embodiment. 
       5: Other Embodiments 
       [0095]    The present invention is not limited to or by the above embodiments, and various changes and modifications are possible without departing from the scope of the invention. 
         [0096]    In the following description, components having substantially the same function as those in the above embodiments will be numbered the same, and will not be described again in detail. 
         [0097]    5.1: Positional Relation Between First Lock Lever  201  and Second Lock Lever  402   
         [0098]    In the above embodiments, the movement direction of the first lock lever  201  matched the movement direction of the second lock lever  202 , but the constitution may instead be one in which the second lock lever  202  moves along the movement direction of the first lock lever  201 . That is, the movement direction of the first lock lever  201  need only substantially coincide with the movement direction of the second lock lever  202 . 
         [0099]    Also, the first lock lever  201  and the second lock lever  202  were disposed aligned in their movement direction, but the second lock lever  202  may be offset to a direction perpendicular to the movement direction with respect to the first lock lever  201 . 
         [0100]      FIG. 7  is a simplified diagram of the layout of the first lock lever  201  and a second lock lever  206 .  FIG. 7  is a plan view of the first lock lever  201 , the second lock lever  206 , and the leaf spring  205  as seen from the Z axis direction negative side. The second lock lever  206  has a lever main body  206   b  and a guide portion  202   c . As shown in  FIG. 7 , the lever main body  206   b  is disposed to the side of the guide portion  202   c , and does not overlap the leaf spring  205  when viewed in the Z axis direction. In this case, the movement region of the first lock lever  201  and the second lock lever  206  can be set longer, which should make the device easier to operate. 
         [0101]    5.2: Leaf Spring  205   
         [0102]    In the above embodiments, the leaf springs  205  and  255  are described as examples of restricting members, but the restricting member is not limited to the leaf springs  205  and  255 . For example, the restricting member can be a leaf spring made of plastic, or an elastic member other than a leaf spring can be used as the restricting member. 
         [0103]      FIGS. 8A and 8B  are simplified side views of a restricting member  209  and the second lock lever  202 . The first lock lever  201  is omitted from  FIGS. 8A and 8B .  FIG. 8A  shows a state in which the second lock lever  202  is disposed at the locked position P 31 , and  FIG. 9B  shows a state in which the second lock lever  202  is disposed at the unlocked position P 32 . 
         [0104]    The restricting member  209  has a restricting plate  207  and a biasing member  208 . The restricting plate  207  has a restricting plate main body  207   b  and a convex part  207   a . The restricting plate main body  207   b  has a substantially plate-like shape. The convex part  207   a  protrudes from the restricting plate main body  207   b  toward the second lock lever  202 . The biasing member  208  pushes the restricting plate  207  toward the second lock lever  202 . The biasing member  208  is mounted to the lid  200 , and can be made up of a coil spring, a piece of rubber, or the like. 
         [0105]    In the state shown in  FIG. 8A , the convex part  207   a  of the restricting plate  207  is fitted into the concave part  202   a  of the second lock lever  202 . When the second lock lever  202  is moved in the C direction, the concave part  202   a  and the convex part  207   a  come apart, and the restricting plate  207  is pushed down against the biasing force of the biasing member  208 . Thus, the restricting member  209  is guided by the second lock lever  202  from the restricting position P 21  to the retracted position P 22 . 
         [0106]    When the restricting plate  207  is pushed down against the biasing force of the biasing member  208 , the fitting of the concave part  202   a  of the second lock lever  202  together with the convex part  207   a  of the restricting plate  207  does not necessarily have to be utilized. The constitution shown in  FIGS. 9A and 9B  is also possible. 
         [0107]      FIGS. 9A and 9B  are simplified side views of a restricting member  219  and a second lock lever  212 . The first lock lever  201  is omitted from  FIGS. 9A and 9B .  FIG. 9A  shows a state in which the second lock lever  212  is disposed at the locked position P 31 , and  FIG. 8B  shows a state in which the second lock lever  212  is disposed at the unlocked position P 32 . 
         [0108]    As shown in  FIGS. 9A and 9B , the second lock lever  212  has a lever main body  202   b  and a guide portion  212   c . The guide portion  212   c  has an inclined face  212   g . The restricting member  219  has a restricting plate  217  and a biasing member  208 . The restricting plate  217  has a restricting plate main body  207   b  and a slider  217   a . The slider  217   a  protrudes from the restricting plate main body  207   b  toward the second lock lever  212 , and has an inclined face  217   g . The inclined face  217   g  comes into contact with the inclined face  212   g.    
         [0109]    When the second lock lever  212  moves in the C direction, the restricting plate  217  is pushed down by the inclined face  212   g  of the guide portion  212   c . Thus, the restricting member  219  is guided by the second lock lever  212  from the restricting position P 21  to the retracted position P 22 . 
         [0110]    5.3: Electronic Device 
         [0111]    In the above embodiments, an electronic device was described using the digital camera  100  as an example, but the electronic device is not limited to the digital camera  100 . For example, it may be any other device as long as a lid and a lid locking mechanism are installed in the device. 
       General Interpretation of Terms 
       [0112]    In understanding the scope of the present disclosure, the term “comprising” and its derivatives, as used herein, are intended to be open ended terms that specify the presence of the stated features, elements, components, groups, integers, and/or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and/or steps. The foregoing also applies to words having similar meanings such as the terms, “including”, “having” and their derivatives. Also, the terms “part,” “section,” “portion,” “member” or “element” when used in the singular can have the dual meaning of a single part or a plurality of parts. Also as used herein to describe the above embodiment(s), the following directional terms “forward”, “rearward”, “above”, “downward”, “vertical”, “horizontal”, “below” and “transverse” as well as any other similar directional terms refer to those directions of an electronic device. Accordingly, these terms, as utilized to describe the present invention should be interpreted relative to an electronic device. 
         [0113]    The term “configured” as used herein to describe a component, section, or part of a device implies the existence of other unclaimed or unmentioned components, sections, members or parts of the device to carry out a desired function. 
         [0114]    The terms of degree such as “substantially”, “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. 
         [0115]    While only selected embodiments have been chosen to illustrate the present invention, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the scope of the invention as defined in the appended claims. For example, the size, shape, location or orientation of the various components can be changed as needed and/or desired. Components that are shown directly connected or contacting each other can have intermediate structures disposed between them. The functions of one element can be performed by two, and vice versa. The structures and functions of one embodiment can be adopted in another embodiment. It is not necessary for all advantages to be present in a particular embodiment at the same time. Every feature which is unique from the prior art, alone or in combination with other features, also should be considered a separate description of further inventions by the applicant, including the structural and/or functional concepts embodied by such feature(s). Thus, the foregoing descriptions of the embodiments according to the present invention are provided for illustration only, and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.