Patent Publication Number: US-10767914-B2

Title: Icemaker and freezer

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present disclosure relates to an icemaker and a freezer. 
     2. Description of the Related Art 
     An automatic ice-making device installed in a freezer is known. For example, an automatic ice-making device that drops ice made with an ice-making tray into an ice storage tank by using an ice-discharging device is known. 
     As a freezer in which an automatic ice-making device such as that described above is installed, there is a freezer in which lighting is not installed. In the case of such a freezer, there are cases in which it is difficult for the user to view the interior of the freezer, resulting in a problem of reduced convenience for the user. 
     To solve this problem, it is conceivable to provide a lighting unit in the automatic ice-making device and illuminate the interior of the freezer with light emitted from the lighting unit. However, in the case of this configuration, depending on how the lighting unit is attached, the interior of the freezer may become too bright because the light emitted from the lighting unit may directly reach the eyes of the user, thus the convenience for the user may not be improved sufficiently in some cases. 
     SUMMARY OF THE INVENTION 
     An icemaker of an exemplary embodiment of the present disclosure is disposable in a freezer, and, when power is supplied, makes ice by using cold air of a freezing chamber to freeze water that has been poured into an ice-making tray and that discharges the ice, and includes an ice-making tray in which ice is produced, an ice-discharging mechanism that removes the ice from the ice-making tray, a driver that drives the ice-discharging mechanism and that is attached to the ice-making tray on a front side in a front-rear direction, and a lighting unit that emits light. The lighting unit emits the light toward a rear side in the front-rear direction. 
     A freezer of an exemplary embodiment of the present disclosure includes a freezer body that is box-shaped and that includes an opening on a front side in a front-rear direction, a door that opens and closes the opening, and an icemaker attached to a side surface on one side in a left-right direction perpendicular to both the front-rear direction and a top-bottom direction among inner side surfaces of the freezer body. The icemaker includes an ice-making tray in which ice is produced, an ice-discharging mechanism that removes the ice from the ice-making tray, a driver that drives the ice-discharging mechanism and that is attached to the ice-making tray on the front side, and a lighting unit that emits light. The lighting unit includes a light source and a circuit board to which the light source is attached, and emits the light toward a rear side in the front-rear direction. An attachment surface of the circuit board to which the light source is attached faces the rear side. When viewed in the top-bottom direction, an inclination of a first imaginary line with respect to the left-right direction, the first imaginary line connecting an end portion of the attachment surface on another side in the left-right direction and an end portion of the opening on the other side in the left-right direction, is equal to or less than an inclination of a second imaginary line with respect to the left-right direction, the second imaginary line connecting the light source and the end portion of the opening on the other side in the left-right direction. 
     The above and other elements, features, steps, characteristics and advantages of the present disclosure will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a freezer according to a first exemplary embodiment of the present disclosure. 
         FIG. 2  is a perspective view illustrating an icemaker of the first exemplary embodiment of the present disclosure. 
         FIG. 3  is a perspective view illustrating the icemaker of the first exemplary embodiment of the present disclosure. 
         FIG. 4  is a plan view schematically illustrating a portion of the freezer of the first exemplary embodiment of the present disclosure. 
         FIG. 5  is a perspective view illustrating a portion of the icemaker of the first exemplary embodiment of the present disclosure. 
         FIG. 6  is a perspective view illustrating an icemaker of a second exemplary embodiment of the present disclosure. 
         FIG. 7  is a plan view illustrating a lighting unit according to the second exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following description, in the three-dimensional coordinate system illustrated in each drawing, the Z-axis direction is the vertical direction, and the X-axis direction and the Y-axis direction are perpendicular to the Z-axis direction and perpendicular to each other. In the Z-axis direction, the positive side is defined as “upper side” and the negative side is defined as “lower side”. In addition, the X-axis direction is referred to as “front-rear direction”, and the Y-axis direction is referred to as “left-right direction”. In addition, in the X-axis direction, the positive side is defined as “front side” and the negative side is defined as “rear side”. In addition, in the Y-axis direction, the positive side is defined as “right side” and the negative side is defined as “left side”. Further, a top-bottom direction, the front-back direction, and the left-right direction are simply used for explanation, and do not limit actual positional relationships and directions. 
     As illustrated in  FIG. 1 , a freezer  1  of the present embodiment includes a freezer body  10 , a door  11 , and an icemaker  20 . The freezer body  10  has a box shape having an opening portion  10   a  on the front side in the front-rear direction. The opening portion  10   a  has a rectangular shape. Further, in  FIG. 1 , an upper end portion of the freezer body  10  is illustrated as a cross section perpendicular to the top-bottom direction. 
     Further, in this specification, “freezer” includes a freezer of a freezer refrigerator and a freezing chamber. That is, in the present specification, “freezer” includes, in addition to a dedicated freezer, a refrigerator with a freezer and a refrigerator with a freezing chamber. 
     The door  11  opens and closes the opening portion  10   a . The door  11  is attached to the freezer body  10  on the right side of the opening portion  10   a . The door  11  is attached to the freezer body  10  via, for example, a hinge, and is openable and closeable. Further, the door  11  may be attached to the freezer body  10  on the left side of the opening portion  10   a  or may be attached to the freezer body  10  on the upper side of the opening portion  10   a  or may be attached to the freezer body  10  on the lower side of the opening portion  10   a.    
     The icemaker  20  is an icemaker that is disposable in the freezer  1 , more specifically in the freezer body  10 , and, when power is supplied, that makes ice by using cold air of the freezing chamber to freeze water which has been poured into an ice-making tray and that discharges the ice. Further, the freezing chamber is the inside of the freezer  1 , that is, the inside of the freezer body  10 . The icemaker  20  is attached to a side surface  10   b  on one side in the left-right direction perpendicular to both the front-rear direction and the top-bottom direction among the inner side surfaces of the freezer body  10 . In  FIG. 1 , the side surface  10   b  is the side surface on the left side in the left-right direction among the inner side surfaces of the freezer body  10 . 
     As illustrated in  FIG. 2 , the icemaker  20  includes an ice-making tray  30 , an ice-discharging mechanism  31 , a driver  40 , a connector  70 , a sensor  60 , and a lighting unit  50 . The ice-making tray  30  is a portion for manufacturing ice. The ice-making tray  30  has a substantially rectangular parallelepiped box shape that opens to the upper side and is elongated in the front-rear direction. The interior of the ice-making tray  30  is partitioned into a plurality of partition portions  30   a  along the front-rear direction. Water is supplied to each of the partition portions  30   a . By freezing the water supplied to each of the partition portions  30   a , ice is produced in each of the partition portions  30   a . As a result, ice is produced in the ice-making tray  30 . 
     The ice-discharging mechanism  31  is a portion for taking out ice from the ice-making tray  30 . The ice-discharging mechanism  31  includes an ice-discharging lever shaft  32  and a plurality of ice-discharging levers  33 . The ice-discharging lever shaft  32  is a columnar shaft extending in the front-rear direction. An end portion of the ice-discharging lever shaft  32  on the rear side is connected to an upper end of a wall portion of the ice-making tray  30  on the rear side so as to be rotatable about the axis of the ice-discharging lever shaft  32 . As illustrated in  FIG. 3 , an end portion of the ice-discharging lever shaft  32  on the front side is connected to the driver  40 . The ice-discharging lever shaft  32  is rotated about the axis of the ice-discharging lever shaft  32  by the driver  40 . 
     The ice-discharging levers  33  have a bar shape extending radially outward from the ice-discharging lever shaft  32 . The plurality of ice-discharging levers  33  are disposed side by side along the front-rear direction. The ice-discharging levers  33  rotate about the axis of the ice-discharging lever shaft  32  when the ice-discharging lever shaft  32  rotates. When each of the ice-discharging levers  33  rotates, it passes through a corresponding one of the partition portions  30   a.    
     The driver  40  is attached to a front side of the ice-making tray  30  in the front-rear direction. The driver  40  drives the ice-discharging mechanism  31 . More specifically, the driver  40  rotates the ice-discharging lever shaft  32  about its axis. In the present embodiment, the driver  40  rotates the ice-discharging lever shaft  32  in the clockwise direction as viewed from the front side. The driver  40  includes a driver body  42  and a casing  41 . 
     The driver body  42  rotates the ice-discharging lever shaft  32  about the axis of the ice-discharging lever shaft  32 . The driver body  42  is an electric motor. The casing  41  houses the driver body  42 . The casing  41  has a rectangular box shape. The casing  41  includes a main body  43  and a lid portion  44 . 
     The main body  43  is box-shaped and opens to the front side. The driver body  42  is housed inside the main body  43 . A wall portion of the ice-making tray  30  on the front side is fixed to a lower portion of a rear surface of the main body  43 . 
     The lid portion  44  is attached to the front side of the main body  43 . The lid portion  44  includes a lid portion body  44   a  and a lighting attachment portion  44   b . The lid portion body  44   a  has a box shape that opens to the rear side. The lid portion body  44   a  covers the opening on the front side of the main body  43 . The lid portion body  44   a  substantially overlaps the main body  43  as viewed in the front-rear direction. 
     The lighting attachment portion  44   b  projects rightward from the front end of a side surface on the right side of the lid portion body  44   a . The lighting attachment portion  44   b  extends in the top-bottom direction from an upper end to a lower end of the lid portion body  44   a . As illustrated in  FIG. 2 , a front surface of the lid portion body  44   a  and a front surface of the lighting attachment portion  44   b  constitute a front surface of the lid portion  44  perpendicular to the front-rear direction, that is, the front surface of the driver  40 . 
     When the driver  40  drives the ice-discharging mechanism  31 , the ice-discharging lever shaft  32  rotates, and each of the ice-discharging levers  33  passes through a corresponding one of the partition portions  30   a . As a result, the ice produced in the partition portions  30   a  is pushed out from the partition portions  30   a  by each of the ice-discharging levers  33 . The ice pushed out from the partition portions  30   a  is dropped and stored in an ice storage tank (not illustrated) disposed on the lower side of the icemaker  20 . In this way, the ice produced in the ice-making tray  30  is removed by the driver  40  and the ice-discharging mechanism  31 . 
     The connector  70  is led out from the driver  40  to the rear side of the ice-making tray  30  via a cable. The connector  70  is connected to an external power source that supplies power to the driver  40 . The external power source to which the connector  70  is connected is the power source of the freezer  1 . 
     The sensor  60  is a sensor for detecting the open/closed state of the freezer  1 . That is, the sensor  60  detects the open/closed state of the door  11 . The sensor  60  is disposed on the front surface of the driver  40 . The sensor  60  is not particularly limited as long as it can detect the open/closed state of the freezer  1 . In the present embodiment, the sensor  60  is an infrared sensor. Although not illustrated, the sensor  60  includes a cover. The material of the cover of the sensor  60  is, for example, high-density polyethylene, polypropylene or the like. Further, note that the sensor  60  may be a temperature sensor, a light detection sensor, or the like. 
     The lighting unit  50  is a portion that emits light. As illustrated in  FIG. 4 , the lighting unit  50  emits light toward the rear side in the front-rear direction. Therefore, as in the freezer  1  of the present embodiment, when the icemaker  20  is disposed in a freezer with the driver  40  on the side of the opening portion  10   a  and the ice-making tray  30  of the icemaker  20  on the opposite side to the opening portion  10   a , it is possible to suppress the light from the lighting unit  50  from directly going to the user. As a result, it is possible to illuminate the interior of the freezer  1  by the lighting unit  50  while suppressing excessive dazzling of the interior of the freezer  1 . Therefore, the convenience for the user can be improved. Further, in the present specification, “the lighting unit emits light toward the rear side in the front-rear direction” means that the user or the like cannot at least directly observe the light emitted from the lighting unit from the outside of the freezer body via the opening portion or that the user or the like cannot at least directly observe the light emitted from the lighting unit when viewing the icemaker from the front side. That is, in the present specification, the phrase “the lighting unit emits light toward the rear side in the front-rear direction” includes, in addition to the case where light is emitted rearward from and normal to the lighting unit, the cases where light traveling in the left-right direction, in the top-bottom direction, and in a direction tilted toward both the left-right direction and the top-bottom direction with respect to a direction in which light travels rearward from and normal to the lightning unit is emitted from the lighting unit. Even in those cases, it is not possible to directly observe the light emitted from the lighting unit from the outside of the freezer body via the opening portion. 
     Further, it should be noted that “it is not possible to directly observe the light emitted from the lighting unit” includes the case where the light emitted from the lighting unit without being incident on other members does not enter the eyes of the user. That is, “it is not possible to directly observe the light emitted from the lighting unit” may include the case where light emitted from the lighting unit is reflected or refracted by other members and indirectly enters the eyes of the user even when the user cannot directly observe the light emitted from the lighting unit. 
     In addition, in the present specification, some of the light emitted from the lighting unit does not have to be light traveling toward the rear side in the front-rear direction. In the present specification, for example, it suffices that, among the light emitted from the lighting unit, the amount of light traveling toward the rear side in the front-back direction is larger than the amount of light not traveling toward the rear side in the front-rear direction. In addition, in this specification, for example, it suffices that the direction of the optical axis of the light emitted from the lighting unit is a direction that goes toward the rear side in the front-rear direction. 
     Further, in the following description, “toward the rear side in the front-rear direction” may be simply referred to as “rearward”. 
     In the present embodiment, the direction of the light emitted from the lighting unit  50  is inclined with respect to the front-rear direction. Therefore, as compared with the case where the light emitted from the lighting unit  50  is emitted rearward from and normal to the lighting unit  50 , the light emitted from the lighting unit  50  can be expanded in the left-right direction and the inside of the freezer  1  can be illuminated widely. As a result, it is possible to suitably brighten the interior of the freezer  1 , and it is possible to further improve the convenience for the user. In the present embodiment, the optical axis of the light emitted from the lighting unit  50  is inclined diagonally rearward to the right side. 
     The lighting unit  50  is provided in the driver  40 . Therefore, as in the freezer  1  of the present embodiment, when the icemaker  20  is placed in the freezer  1  with the driver  40  on the opening portion  10   a  side and the ice-making tray  30  of the icemaker  20  on the opposite side from the opening portion  10   a , the lighting unit  50  can be disposed close to the opening portion  10   a . Therefore, for example, compared with the case where the lighting unit  50  is provided on the ice-making tray  30 , it is possible to lengthen the distance until the light emitted rearward from the lighting unit  50  reaches the rear-side wall in the freezer  1 . As a result, the light emitted rearward from the lighting unit  50  easily spreads out in the freezer  1  and it is easy to illuminate the interior of the freezer  1  widely. Therefore, it is possible to make the interior of the freezer  1  suitably brighter, thereby further improving the convenience for the user. In addition, it is easy to receive power supply for the lighting unit  50  from the power supplied to the driver  40 . 
     As illustrated in  FIG. 3 , the lighting unit  50  is provided on a side surface  40   a  of the driver  40  along the front-rear direction. Therefore, it is easy to adopt a configuration in which the lighting unit  50  emits light rearward. In addition, as in the freezer  1  of the present embodiment, when the icemaker  20  is attached to the side surface  10   b  in the freezer body  10 , by emitting light from the lighting unit  50  diagonally rearward in the left-right direction, it is possible to widely illuminate the inside of the freezer  1  in the left-right direction. Therefore, the inside of the freezer  1  can be made more suitably brighter and the convenience for the user can be further improved. 
     In the present embodiment, the side surface  40   a  is the right side surface of the driver  40 . More specifically, the side surface  40   a  is the right side surface of the casing  41 . The lighting unit  50  is provided on the right side surface of the lid portion body  44   a  within the side surface  40   a . In addition, as in the freezer  1  of the present embodiment, when the icemaker  20  is placed in the freezer with the driver  40  on the side of the opening portion  10   a  and the ice-making tray  30  of the icemaker  20  on the opposite side to the opening portion  10   a , it is possible to dispose the lighting unit  50  closer to the opening portion  10   a . Therefore, the inside of the freezer  1  can be made more suitably brighter and the convenience for the user can be further improved. 
     The lighting unit  50  is disposed on the rear side of the lighting attachment portion  44   b . As illustrated in  FIG. 5 , the lighting unit  50  includes a board-fixing portion  55 , a circuit board  51 , and light sources  52 . As illustrated in  FIG. 3 , the lighting unit  50  includes a cover  53 . In  FIG. 5 , illustration of the cover  53  is omitted. As illustrated in  FIG. 5 , the board-fixing portion  55  is fixed to the rear surface of the lighting attachment portion  44   b  and the side surface  40   a . The board-fixing portion  55  holds the circuit board  51 . 
     The circuit board  51  has a rectangular plate shape that is elongated in the top-bottom direction. The circuit board  51  is fixed to the lid portion  44  by the board-fixing portion  55 . The circuit board  51  is located on the rear side of the lighting attachment portion  44   b . The entirety of the circuit board  51 , as viewed along the front-rear direction, overlaps with the lighting attachment portion  44   b.    
     The light sources  52  are attached to the circuit board  51 . An attachment surface  51   a  to which the light sources  52  of the circuit board  51  are attached faces the rear side. Therefore, by attaching the light sources  52  to the attachment surface  51   a  of the circuit board  51 , light can be emitted from the lighting unit  50  toward the rear side in the front-rear direction. In addition, even when the light from the light sources  52  leaks to the front side, light is blocked by the circuit board  51 , and it is possible to further suppress the light from the lighting unit  50  from directly going to the user. As a result, this can further suppress the interior of the freezer  1  from becoming dazzling. 
     Further, in the present specification, the phrase “the attachment surface faces the rear side” means that, as viewed from the rear side, at least a portion of the attachment surface can be observed. In the present embodiment, the attachment surface  51   a  is inclined with respect to a plane perpendicular to the front-rear direction. Therefore, by attaching the light sources  52  to the attachment surface  51   a  of the circuit board  51 , light can be emitted from the lighting unit  50  rearward inclined with respect to the front-back direction. In the present embodiment, the attachment surface  51   a  faces diagonally rearward toward the right side. 
     The light sources  52  are light emitting diodes. A plurality of the light sources  52  are provided. In  FIG. 5 , four light sources  52  are provided. The plurality of the light sources are disposed at intervals in the top-bottom direction perpendicular to the front-back direction. For example, when a plurality of light sources are disposed in one location, light rays from the plurality of light sources are collectively emitted from the one location, and the location where the plurality of light sources are collectively disposed is locally bright. Therefore, the user may feel that the light emitted from the lighting unit is dazzling. In addition, when a plurality of light sources are collectively disposed in one location, the calorific value of the light sources locally increases and the light sources reach a high temperature in some cases. In the case where the light sources are light emitting diodes, the amount of luminescence decreases due to the high temperature and a sufficient amount of light may not be obtained in some cases. 
     On the other hand, according to the present embodiment, by disposing the plurality of the light sources  52  at intervals in the top-bottom direction, it is possible to disperse the light emitted from the lighting unit  50  in the top-bottom direction. Therefore, it is possible to suppress local brightening of a portion of the lighting unit  50  and to suppress the user from being dazzled. 
     In addition, when the plurality of the light sources  52  are disposed at intervals, it is possible to provide lands, solid wires, and the like for the light sources  52  between the respective light sources  52  on the circuit board  51 . As a result, for example, by using copper foil as the material for the lands, solid wires, and the like, the heat dissipation property of the light sources  52  can be improved. Therefore, it is possible to suppress a high temperature of the light sources  52  and to suppress a decrease in the amount of light of the light sources  52 . In the present embodiment, solid wires  52   a  composed of copper foil are provided between the light sources  52  on the attachment surface  51   a  of the circuit board  51  and on the upper side of the light source  52  at the uppermost side and on the lower side of the light source  52  at the lowermost side. 
     In addition, in the present embodiment, as compared with the case where the plurality of the light sources  52  are disposed at intervals in the left-right direction, because the plurality of the light sources  52  are disposed at intervals in the top-bottom direction, it is possible to suppress the icemaker  20  from becoming large in the left-right direction. In addition, as compared with the case where the plurality of the light sources  52  are disposed at intervals in the front-rear direction, the positions of the light sources  52  can be easily brought close to the opening portion  10   a  and the interior of the freezer  1  can be suitably illuminated brightly. 
     As illustrated in  FIG. 3 , the cover  53  is fixed to the rear side of the lighting attachment portion  44   b . The cover  53  is a plate-like member extending in the top-bottom direction. The cover  53  covers the board-fixing portion  55 , the circuit board  51 , and the light sources  52  from the rear side. The cover  53  has a property of transmitting the light emitted from the light sources  52 . In the present embodiment, the light emitted from the lighting unit  50  is light emitted from the cover  53  toward the outside of the icemaker  20 . That is, in the present embodiment, the light emitted from the cover  53  is emitted rearward. 
     In the present embodiment, the arrangement relationship between the lighting unit  50  and the opening portion  10   a  is a predetermined arrangement relationship. As illustrated in  FIG. 4 , as viewed in the top-bottom direction, an imaginary line connecting a right end portion of the attachment surface  51   a  and a right end portion of the opening portion  10   a  is defined as a first imaginary line C 1 . An imaginary line connecting the light source  52  and the right end portion of the opening portion  10   a  is defined as a second imaginary line C 2 . 
     Further, note that the right end portion of the attachment surface  51   a  is the end portion of the attachment surface  51   a  on the opposite side to the side surface  10   b  to which the icemaker  20  is attached and corresponds to the end portion of the attachment surface  51   a  on another side in the left-right direction. The right end portion of the opening portion  10   a  is the end portion of the opening portion  10   a  on the opposite side to the side surface  10   b  to which the icemaker  20  is attached and corresponds to the end portion of the opening portion  10   a  on the other side in the left-right direction. 
     The inclination θ 1  of the first imaginary line C 1  with respect to the left-right direction is equal to or less than the inclination θ 2  of the second imaginary line C 2  with respect to the left-right direction. When this relationship is satisfied, the user cannot observe the light sources  52  from the outside of the freezer body  10  via the opening portion  10   a . Therefore, it is possible to inhibit the light of the light sources  52  from directly entering the eyes of the user and to suppress the user from being dazzled. In  FIG. 4 , the inclination θ 1  of the first imaginary line C 1  with respect to the left-right direction is smaller than the inclination θ 2  of the second imaginary line C 2  with respect to the left-right direction. 
     The lighting unit  50  emits light when the sensor  60  detects that the freezer  1  is in an open state. Therefore, it is possible to suitably control the emission of light by the lighting unit  50  as necessary when the user observes the interior of the freezer  1  or the like. As a result, it is possible to save electric power required for the lighting unit  50 . In the present embodiment, the sensor  60  detects that the freezer  1  is in an open state when movement of a person is detected. 
     In the present embodiment, the lighting unit  50 , for example, emits light after the sensor  60  has detected that the freezer  1  has been in an open state for a predetermined time. In the case where the sensor  60  is an infrared sensor, there is a case where the sensor  60  reacts to an induced electromotive force generated from the driver  40  and the freezer  1  is erroneously detected as being in an open state. Here, the time during which the induced electromotive force occurs is a short time. Therefore, by adopting a configuration in which the lighting unit  50  emits light when it is detected that the freezer  1  has been continuously in an open state for a predetermined time longer than the time over which the induced electromotive force is generated, erroneous detection of the state of the freezer  1  can be suppressed. 
     The present disclosure is not limited to the embodiment described above and other configurations may be adopted. In the following explanation, the same reference numerals are given for the same configurations as those described above so that explanation may be omitted in some cases. 
     The arrangement location of the lighting unit  50  is not particularly limited as long as light can be emitted rearward from the lighting unit  50 . The lighting unit  50  may be provided on the lower surface of the lid portion  44  or may be provided on the upper surface of the lid portion  44 . In addition, the lighting unit  50  may be provided on the main body  43  of the casing  41  or may be provided on the ice-making tray  30 . 
     In addition, the number of the light sources  52  may be one or more, three or less, or five or more. The directions in which light is emitted from the plurality of the light sources  52  may be different from each other. The plurality of the light sources  52  may be disposed in one location. 
     In addition, the type of the light sources  52  is not particularly limited and the light sources  52  may be light sources other than light emitting diodes. The light sources  52  may be, for example, laser light sources, lamp light sources, or the like. Depending on the type of the light sources  52 , the circuit board  51  need not be provided. 
     As illustrated in  FIG. 6 , in an icemaker  120  of the present embodiment, a lid portion  144  of a driver  140  is different from the lid portion  44  of the first embodiment in that the lid portion  144  does not include the lighting attachment portion  44   b . The lid portion  144  has a lighting attachment recessed portion  144   c  recessed toward the left side from the right side surface of the lid portion  144 . The lighting attachment recessed portion  144   c , as viewed from the right side, has a rectangular shape elongated in the top-bottom direction. The lighting attachment recessed portion  144   c  is provided at the front end of the right side surface of the lid portion  144  and opens to the front side. 
     A lighting unit  150  is disposed in the lighting attachment recessed portion  144   c . As illustrated in  FIG. 7 , a circuit board  151  is disposed perpendicular to the left-right direction. That is, in the circuit board  151 , an attachment surface  151   a  to which the light sources  52  are attached is disposed along the front-rear direction. Therefore, the proportion of the circuit board  151  in the left-right direction to the lighting unit  150  can be reduced. Light is emitted from the light sources  52  attached to the attachment surface  151   a  toward the right side. 
     The lighting unit  150  includes an optical member  153  on which light emitted from the light sources  52  is incident. The optical member  153  has a property of transmitting the light emitted from the light sources  52 . The optical member  153  includes a front cover portion  153   a , a right cover portion  153   b , and a light-refracting portion  154 . 
     The front cover portion  153   a  has a plate shape that extends along a plane perpendicular to the front-rear direction. As illustrated in  FIG. 6 , the shape of the front cover portion  153   a  seen from the front side is a rectangular shape elongated in the top-bottom direction. A front surface of the front cover portion  153   a  is disposed on substantially the same plane as a front surface of the lid portion  144 . 
     The right cover portion  153   b  is in the form of a plate extending from a right end portion of the front cover portion  153   a  toward the rear side. The shape of the right cover portion  153   b  seen from the right side is a rectangular shape elongated in the top-bottom direction. A right surface of the right cover portion  153   b  is disposed on substantially the same plane as a right surface of the lid portion  144 . 
     As illustrated in  FIG. 7 , the light-refracting portion  154  is provided on a left surface of the right cover portion  153   b . The light-refracting portion  154  is constituted by a plurality of projecting portions that protrude leftward from the right cover portion  153   b  and that are disposed along the front-rear direction. Each projecting portion extends in the top-bottom direction. The light-refracting portion  154  is a portion of a Fresnel lens. That is, the optical member  153  includes at least a portion of a Fresnel lens. More specifically, in the present embodiment, the light-refracting portion  154  is a portion of a linear Fresnel lens. 
     The light emitted from the light sources  52  is incident on the optical member  153 . More specifically, the light emitted from the light sources  52  is incident on the light-refracting portion  154 . The light incident on the light-refracting portion  154  is refracted or reflected and is emitted rearward. As a result, the optical member  153  emits the incident light rearward in the front-rear direction. 
     As described above, according to the present embodiment, the direction of the light emitted from the light sources  52  can be changed rearward by the optical member  153 . Therefore, the degree of freedom of arrangement of the circuit board  151  and the light sources  52  can be improved. In addition, because the optical member  153  includes at least a portion of a Fresnel lens, the light incident on the Fresnel lens can be suitably emitted rearward. 
     Further, the configuration of the optical member  153  is not particularly limited as long as light incident from the light sources  52  can be emitted rearward. The light-refracting portion  154  is not particularly limited as long as it can refract and emit the light rearward, and the light-refracting portion  154  need not be a portion of the Fresnel lens. Instead of the light-refracting portion  154 , the optical member  153  may have a light-reflecting portion that reflects the incident light rearward. The optical member  153  may be constituted only by the light-refracting portion  154  or may be constituted only by the light-reflecting portion. 
     While preferred embodiments of the present disclosure have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present disclosure. The scope of the present disclosure, therefore, is to be determined solely by the following claims.