1. Technical Field
The present disclosure relates to electronic devices.
2. Description of Related Art
Electronic devices, such as DVD players, include a cover, a main body, and a switching portion. The main body includes a power supply, a spindle motor and a circuit board. The switching portion switches the electrical connection between the spindle motor and the circuit board on or off based on the positional relationship between the cover and the main body. The switching portion includes a pressure head set on the main body and a switch on the circuit board corresponding to the pressure head. The pressure head is partially or wholly exposed from the main body. When the main body is covered by the cover, the pressure head is pressed by the cover and so actuates the switch, and the electrical connection between the power supply and the spindle motor is made to enable the spindle motor. When the cover is pulled up from the main body, the pressure head resumes the original position, and the electrical connection between the power supply and the spindle motor is cut off to disable the spindle motor.
However, because the pressure head protrudes out of the main body, the pressure head may be carelessly pressed to enable the spindle motor.
Therefore, there is room for improvement in the art.
The components of the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiment of an electronic device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views.
Embodiments of the present disclosure will be described with reference to the drawings.
The main body 1 includes an upper cover 12, a bottom cover 14, a circuit board 15, and a driving module 16. The upper cover 12 cooperates with the bottom cover 14 to form a cavity (not labeled) for receiving the circuit board 15 and driving module 16.
Further referring to
The upper cover 12 further includes a recessed portion 121, and two limiting mechanisms 124 corresponding to the through holes 120. The recessed portion 121 is substantially circular. The recessed portion 121 is concaved from an outer the surface of the upper cover 12. The receiving slot 121 is used for receiving a disc. The receiving slot 121 defines an opening 1214.
The limiting mechanisms 124 are perpendicularly arranged at an inner surface of the upper cover 12 and respectively correspond to the through holes 120. The limiting mechanism 124 limits the movement of the switching portion 3 for preventing the switching portion 3 moving in the direction parallel with the upper cover 12. Each limiting mechanism 124 includes a limiting portion 1241 and a blocking plate 1243. The limiting portion 1241 and the blocking plate 1243 are arranged at opposite sides of the through hole 120. The limiting portion 1241 surrounds the through hole 120 and is coaxial with the through hole 120. The horizontal cross-section of the limiting portion 1241 is substantially C-shaped. The blocking plate 1243 is substantially rectangular. The blocking plate 1243 includes a hook 1245. The hook 1245 is bent from an end of the blocking plate 1243 away the upper cover 12 towards the limiting portion 1241. The distance between the hook 1245 and the upper cover 12 is greater than the height of the limiting portion 1241 relative to the upper cover 12. In the embodiment, the distance between the hook 1245 and the upper cover 12 is less than the height of the switching portion 3.
The circuit board 15 (see
The driving module 16 mounted on the bottom cover 14 and is electrically connected to the circuit board 15. The diving module 16 is capable of rotating in response to the rotating signal. The driving module 16 is partly exposed from the opening 1214.
Two protrusions 21 protrude from a surface of the flip cover 2 facing the main body 1 and correspond to the through holes 120. The end of the protrusion 21 away from the flip cover 1 is substantially a spherical cap. The protrusion 21 is inserted into a through hole 120 when the flip cover 2 covers the main body 1.
Each switching portion 3 includes a pressing portion 32 corresponding to the limiting mechanism 124 and a switching member 34 engaging with the pressing portion 32 and secured to the circuit board 16. The pressing portion 32 includes a body 321 and an operating portion 324. The body 321 is substantially cylindrical and is used for preventing the pressing portion 32 moving out of the through hole 120. The diameter of the body 321 is larger than the diameter of the through hole 120. An end of the body 321 defines a receiving recess 323. The operating portion 324 is secured to an end of the body 321 opposite to the receiving recess 323 and coaxial with the body 321. The diameter of the operating portion 324 is less than the diameter of the through hole 120, and the height of the operating hole 324 is less than the depth of the through hole 120 in a direction perpendicular to the upper cover 12. The receiving recess 323 makes contact with the switching member 34 when the pressing portion 32 is pressed. In the embodiment, each switching portion 3 has a predetermined distance of travel which is equal to the distance between the hook 1245 and the upper cover 12, and the pressing portion 32 is allowed to move within a range which is less than the predetermined distance of travel to protect the switching member 34 from being damaged.
Referring to
In assembly, the body 321 is received in the limiting mechanism 124 and is supported by the rod 342 received in the receiving recess 1243 to abut the inner surface of the upper cover 12, and the operating portion 324 is received in the through hole 120. Because the height of the operating hole 324 is less than the depth of the through hole 120 in a direction perpendicular to the upper cover 12, the operating portion 324 does not protrude out of the upper cover 12.
When the flip cover 2 is lowered and covers on the main body 1, the protrusion 21 is inserted into the through hole 120. The pressing portion 32 received in the through hole 120 is pressed by the protrusion 21 to actuate the rod 342 to turn on the switch 341. Thus, an electrical connection between the driving module 16 and the circuit board 15 is established, and the driving module 16 is rotated according to the rotating signal generated by the circuit board 15.
When the flip cover 2 is lifted up from the main body 1, the protrusion 21 moves out of the through hole 120, the rod 342 reverts to the original position via elasticity, and the pressing portion 32 moves towards the upper cover 12 until the body 321 abuts the upper cover 12. Thus, the electrical connection between the driving module 16 and the circuit board 15 is cut off, and the driving module 16 stopped rotating.
While various exemplary and preferred embodiments have been described, the disclosure is not limited thereto. On the contrary, various modifications and similar arrangements (as would be apparent to those skilled in the art) are intended to also be covered. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Number | Date | Country | Kind |
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201110451946.6 | Dec 2011 | CN | national |