Image forming apparatus
According to an aspect of the invention, an image forming apparatus includes an apparatus body, a sound absorbing device utilizing a Helmholtz resonator, and a hinged exterior cover operable to open and close relative to the apparatus body. The hinged exterior cover is a hinged cover configured to pivot about a pivot shaft arranged at a lower end portion of the hinged exterior cover. At least a part of the hinged exterior cover has a multiplex structure made by overlaying a plurality of plate-like members on one another. The sound absorbing device is formed by utilizing space between two plate-like members of the plurality of plate-like members making up the multiplex structure as a cavity of the Helmholtz resonator.
1. An image forming apparatus comprising:
an apparatus body;
a sound absorbing device utilizing a Helmholtz resonator; and
a hinged exterior cover operable to open and close relative to the apparatus body,
wherein, the hinged exterior cover is a hinged cover configured to pivot about a pivot shaft arranged at a lower end portion of the hinged exterior cover, at least a part of the hinged exterior cover having a multiplex structure made by overlaying a plurality of plate-like members on one another, and
the sound absorbing device is formed by utilizing space between two plate-like members of the plurality of plate-like members making up the multiplex structure as a cavity of the Helmholtz resonator.
2. The image forming apparatus according to claim 1 , wherein an outer plate-like member of the two plate-like members making up the multiplex structure includes walls that form side surfaces of the cavity.
3. The image forming apparatus according to claim 1 , wherein an inner plate-like member of the two plate-like members making up the multiplex structure includes walls that form side surfaces of the cavity.
4. The image forming apparatus according to claim 1 , further comprising a positioning unit configured to position the sound absorbing device relative to the apparatus body.
5. The image forming apparatus according to claim 1 , further comprising
a detachable component configured to be mounted/dismounted on/from the apparatus body with the hinged exterior cover being open,
wherein an inner plate-like member of the two plate-like members making up the multiplex structure includes a reduced portion, the reduced portion being a portion where distance between the inner-plate-like member and an outer plate-like member of the two plate-like members is reduced to avoid a space across which the detachable component is to be inserted/extracted when the detachable component is mounted/dismounted.
6. The image forming apparatus according to claim 5 , wherein the inner plate-like member of the two plate-like members making up the multiplex structure includes a guide portion that forms a step between itself and the reduced portion, the step making sliding contact with a side surface of the detachable component to guide a direction in which the detachable component is to be inserted/extracted.
7. The image forming apparatus according to claim 5 ,
wherein a protrusion is formed on top surface of the reduced portion, and
a guide groove is defined in bottom surface of the detachable component, the guide groove being configured to be engaged by the protrusion to thereby define a moving direction of the detachable component relative to the protrusion.
8. The image forming apparatus according to claim 5 ,
wherein a protrusion is formed on bottom surface of the detachable component, and
a guide groove is formed in top surface of the reduced portion so that the guide groove is configured to be engaged by the protrusion to thereby define a moving direction of the detachable component relative to the apparatus body.
9. The image forming apparatus according to claim 1 ,
wherein an open angle of the hinged exterior cover is larger than 90 degrees, and
an inner plate-like member, the inner plate-like member being an innermost one of the plurality of plate-like members making up the multiplex structure, is tilted relative to an outer plate-like member, the outer plate-like member being an outermost one of the plurality of plate-like members, such that distance between the inner plate-like member and the outer plate-like member decreases toward the pivot shaft.
10. The image forming apparatus according to claim 1 ,
wherein an open angle of the hinged exterior cover is smaller than 90 degrees, and
an inner plate-like member, the inner plate-like member being an innermost one of the plurality of plate-like members making up the multiplex structure, is tilted relative to an outer plate-like member, the outer plate-like member being an outermost one of the plurality of plate-like members, such that distance between the inner plate-like member and the outer plate-like member increases toward the pivot shaft.