BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a switch structure and, more particularly, to a switch structure integrated with a display and playback device, wherein resilient elements are provided between an actuation element and a lower housing to facilitate relative movement therebetween, and the lower housing has a guide post formed with ribs which allow the actuation element to move smoothly and vertically relative to the lower housing.
2. Description of Related Art
Switches are commonly used to make or break electrical circuits, and switches of different structures are actuated in different ways, such as by pressing, rotating, pulling switch levers, and so on. A switch structure actuated by pressing a button thereof is typically provided with a lower housing or base, which is spaced apart from an actuation element by a proper gap to enable smooth back-and-forth movement of the button during use. However, the very gap also requires that force applied to the switch structure be perpendicular to a force-application surface of the button; otherwise, components inside the button structure tend to be stuck or input the same signal repeatedly, causing a lot of trouble in case of emergency.
BRIEF SUMMARY OF THE INVENTION
In view of the aforementioned problems, the present invention provides an improved switch structure to facilitate relative movement between the actuation element and the lower housing.
The present invention provides a switch structure integrated with a display and playback device, wherein the display and playback device is equipped with a bus line connected with display and playback device terminals, and a display and playback device housing is disposed above the display and playback device and covered by a transparent cover. In addition, a lower housing is provided with a guide post having a periphery formed with a plurality of semi-cylindrical ribs, a rectangular through-hole for being inserted by the display and playback device terminals, a conductor through-hole for being inserted by a conductor, and a terminal through-hole for being inserted by a terminal. Resilient elements are provided between the lower housing and an actuation element having a guide post through-hole for cooperating with the guide post of the lower housing. The semi-cylindrical ribs on the periphery of the guide post come into contact with an inner wall of the guide post through-hole linearly and thus generates little friction therebetween. Consequently, the actuation element is allowed to move vertically and smoothly relative to the lower housing without being stuck during operation of the switch structure. Besides, the display and playback device also serves to enhance work efficiency.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
The invention as well as a preferred mode of use, further objectives and advantages thereof will be best understood by referring to the following detailed description of an illustrative embodiment in conjunction with the accompanying drawings, wherein:
FIG. 1 is a perspective view of a switch structure according to the present invention;
FIG. 2 is an exploded, perspective view of the switch structure according to the present invention;
FIG. 3 is a top view of a lower housing of the switch structure according to the present invention;
FIG. 4 is a sectional, perspective view of the switch structure according to the present invention;
FIG. 5 shows the switch structure according to the present invention in an OFF state; and
FIG. 6 shows the switch structure according to the present invention in an ON state.
DETAILED DESCRIPTION OF THE INVENTION
The structure and functions of the present invention are now described in detail by reference to a preferred embodiment and the accompanying drawings. Referring to FIGS. 1 to 6, a switch structure integrated with a display and playback device according to the present invention essentially includes a transparent cover 1, a display and playback device housing 2, the display and playback device 3, an outer housing 4, an actuation element 5, a lower housing 6, a conductor 7, a terminal 8, and a plurality of resilient elements 9. As shown in FIGS. 2 and 3, the transparent cover 1 is disposed above and covers the display and playback device housing 2, which in turn is disposed above the display and playback device 3. The display and playback device 3 is located above the actuation element 5 and equipped with a bus line connected with display and playback device terminals 32. The lower housing 6 has a rectangular through-hole 62 for being inserted by the display and playback device terminals 32, a conductor through-hole 63 for being inserted by the conductor 7, and a terminal through-hole 64 for being inserted by the terminal 8. In addition, the lower housing 6 is centrally provided with a guide post 61 which has a periphery formed with ribs 611 for cooperating with a guide post through-hole 52 of the actuation element 5. The resilient elements 9 are located bilaterally with respect to the guide post 61 to support the actuation element 5 and other components disposed thereabove. The outer housing 4 engages with the lower housing 6 and thereby restricts relative positions of the actuation element 5 and the lower housing 6.
Referring to FIG. 5, when the switch structure integrated with the display and playback device 3 is not pressed by a downward force, a flange 51 of the actuation element 5 is in contact with a bent portion 71 of the conductor 7 to prevent a flange 72 of the conductor 7 from contacting the terminal 8, thus breaking an electrical circuit connected with the switch structure. Referring now to FIG. 6, when the switch structure is pressed by a downward force, the actuation element 5 is moved downward to compress the resilient elements 9. As a result, the flange 51 of the actuation element 5 is disengaged from the bent portion 71 of the conductor 7, allowing the flange 72 of the conductor 7 to move to the left and contact the terminal 8, thereby closing the electrical circuit.
As shown in FIG. 4, the guide post 61 of the lower housing 6 is in cooperation with the guide post through-hole 52 of the actuation element 5, wherein the semi-cylindrical ribs 611 on the periphery of the guide post 61 make linear contact with the inner wall of guide post through-hole 52 and generate little friction therebetween. In consequence, the actuation element 5 is allowed to move smoothly relative to the lower housing 6, and the displacement therebetween is vertical. Besides, the display and playback device 3 can switch between different images in response to the actuation of the actuation element 5, or perform a display and playback function independently, resulting in enhanced operation efficiency.
Patent Application
20090301849
