This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2009-299172, filed on Dec. 29, 2009, the entire content of which is incorporated herein by reference.
Embodiments described herein relate generally to a cover detaching and attaching structure to allow a cover including a through part for passing a power cord connected to a connection part to be integrally engaged with a main body including the connection part for the power cord, and to be arbitrarily removed from the main body in a state in which the power cord has passed through the through part, and an electronic device using the cover detaching and attaching structure.
In general, an electronic device used in an information system such as a Point-of-Sales (POS) system may include a main body case configured to accommodate a variety of electronic instruments, and a cover integrally attached to the main body case and configured to cover the main body case. In the electronic device, since the cover can be easily attached to or detached from the main body even with a power cord connected to a power supply, there is a risk that a maintenance worker may get an electric shock or inadvertently damage the device.
Thus, there has been proposed a structure to turn off a power supply when a part of the device is opened to replace and add a board (e.g., PCB), thereby avoiding the electric shock and the damage to a board.
In the above structure of the related art, an AC inlet of the power supply is provided at a rear side of a main body of the device to allow a power cord to be inserted into the AC inlet. Since a part of a lower cover to be attached to the main body is formed to surround the periphery of the AC inlet, the lower cover cannot be detached from the main body with the power cord inserted into the AC inlet.
In the above related art, although detachment of the lower cover from the main body is taken into consideration, the lower cover covers only a part of a power-applied portion and other portions are exposed to the outside irrespective of whether the power cord is connected thereto. Thus, such structure is not sufficient to prevent the risk of electric shock and damage of parts.
In addition, since the lower cover is detached from the main body only through one-way movement in which the lower cover is spaced apart from the main body upon removal of the lower cover from the main body, it can also be freely removed from the main body even when the power cord has been removed from the AC inlet. In case of adopting the above cover detaching and attaching structure as an attachment and detachment structure of a cover for covering a main body having a charge portion, if the cover has, for example, a rectangular parallel pipe shape, it may be required that at least four points near four corners of the cover should be fixed to the main body by means of screws in order to integrally fix the cover to the main body in a normal use. In this case, since the number of screw fixing portions increase, the attachment and detachment of the cover to and from the main body is complicated, for which much work time is needed.
According to one embodiment, a cover detaching and attaching structure may allow a cover including a through part, through which a power cord connected to a connection part, to be integrally engaged with a main body including the connection part for the power cord and to be arbitrarily removed from the main body in a state in which the power cord has passed through the through part. The cover detaching and attaching structure is arranged between the main body and the cover, to allow the cover move in a first direction along the longitudinal direction of the power cord connected to the connection part from a state of being integrally engaged with the main body. The cover is further allowed to be moved in a second direction, thereby being detached from the main body, the second direction being orthogonal to the first direction in which the movement of the cover is impeded by interference of the power cord connected to the connection part.
Embodiments of a cover detaching and attaching structure and an electronic device using the cover detaching and attaching structure will now be described in detail with reference to the drawings.
The main body 12 may include a variety of electronic units 14 for implementing certain functions of the electronic device 11 as shown in
As described above, the cover 13 may be configured to cover a part of the rear surface 12a, both side surfaces, and the top surface of the main body 12. Among these portions, a cover portion covering a part of a rear surface 12a of the main body 12 includes a portion that covers an upper edge portion and left and right side portions of the main body rear surface portion 12a. This cover portion is called a cover rear surface portion 13a. A through part 17 for passage of the power cord 15 connected to the power inlet 16 is formed on a surface that opposes the power inlet 16 in the cover rear surface portion 13a shown in a right side of
In one embodiment, provided between the cover 13 and the main body 12 is a cover detaching and attaching structure that can integrally attach the cover 13 to the main body 12, and arbitrarily detach the cover 13 from the main body 12. A detailed description of the cover detaching and attaching structure will be made later. The cover detaching and attaching structure is configured to allow the cover 13 to move slidably within a predetermined range forward and backward (i.e., in the directions of arrows “A” and “B” in
When removing the cover 13 from the main body 12, after one screw 18 is removed, the cover 13 retracts, i.e., is moved backward within a determined range in the direction of the arrow “B” of
At this time, in a state where the power cord 15 has been connected to the power inlet 16 of the main body 12, since the power cord 15 passes through the through part 17 penetratingly formed in the cover rear surface portion 13a as shown in
In other words, to detach the cover 13 from the main body 12, the cover detaching and attaching structure arranged between the main body 12 and the cover 13 is configured to first allow the cover 13 to move in the first direction “B” along the longitudinal direction of the power cord 15 connected to the connection part 16 to release the cover 13 from its engaged state with the main body 12. Then, the cover 13 that is moved in the first direction “B” is further moved in the second direction “C” which is substantially orthogonal to the first direction “B,” so that the cover 13 can be removed from the main body 12. If the power cord 15 is connected to the connection part 16, the cover 13 is impeded from moving into the second direction “C” by interference between the power cord 15 and the cover 13, thereby preventing removal of the cover 13 from the main body 12.
Next, the detailed construction of the above-mentioned cover detaching and attaching structure will be described with reference to
A plurality of engagement pieces 19 (e.g., 3 engagement pieces shown in the drawings) are provided on the inner surface of the cover side surface portion 13b, i.e., on the joining surface between the cover side surface portion 13b and the main body side surface portion 12b. As shown in
Meanwhile, the main body side surface portion 12b has a plurality of engagement parts 20 formed thereon so as to be engaged with the engagement pieces 19. As shown in
Under the above construction, in a normal use state, the cover 13 is positioned in the advanced position with respect to the main body 12, and the cover rear surface portion 13a joins with the main body rear surface portion 12a as shown in
When removing the cover 13 from the main body 12 for the purpose of repair and maintenance, one screw is first released. Thereafter, the cover 13 is moved slidably in the direction of an arrow “B” (i.e., in the first direction) shown in
However, when the power cord 15 has been connected to the power inlet 16 of the main body 12 as shown in
Moreover, the mounting process of the cover 13 on the main body 12 may be performed in a reverse manner to the aforementioned removal process thereof. That is, the cover 13 is moved in the direction opposite to the direction of the arrow “C,” and then the engagement pieces 19 provided on the inner surface of the cover side surface portion 13b is fitted into the apertures 20a of the engagement parts 20 formed on the main body side surface portion 12b. Such fitting operation may be easily performed, e.g., by using elasticity of the engagement pieces 19 and the cover side surface portion 13b. Thereafter, the cover 13 may be moved in the direction of the arrow “A” shown in
In this manner, the cover 13 may be moved in two directions that are substantially orthogonal to each other so that the cover 13 can be integrally engaged with the main body or can be released from the engaged state. Thus, only one screw 18 for fixing the cover may need to be processed. As a result, since the cover does not need to be fixed to the main body by using a plurality of screws unlike the related art, the attachment and detachment of the cover to and from the main body may be facilitated. Further, in case of removing the cover 13 from the main body 12, the removal of the cover 13 is impeded in a state in which the power cord 15 has been connected to the power inlet, thereby preventing a maintenance worker from suffering from an electric shock thereby improving safety levels.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
Number | Date | Country | Kind |
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2009-299172 | Dec 2009 | JP | national |