Patent Application
20060016672
1. Field of the Invention
The present invention relates to a rocker lever assembly, and more particularly to a rocker lever assembly available for controlling the navigation direction or data change of a personal digital product, such as the PDA, video game, cell phone, portable computer or the like.
2. Description of the Related Art
A conventional rocker lever comprises a housing, an operation device mounted in the housing, a switch device mounted on an outside of the housing, a restoring device mounted in the housing, and two variable resistors mounted on an outside of the housing. The operation device includes a first pivot seat pivotable in a longitudinal direction, a second pivot seat pivotable in h a transverse direction perpendicular to that of the first pivot seat, and a control lever movable in the longitudinal direction and the transverse direction to pivot the first pivot seat and the second pivot seat in the longitudinal direction and the transverse direction respectively. When in use, the conventional rocker lever is available for controlling the navigation direction or data change of a personal digital product, such as the PDA, video game, cell phone, portable computer or the like.
However, the switch device mounted on the outside of the housing, so that the conventional rocker lever has a larger volume, thereby increasing costs in package, storage and transportation.
In accordance with the present invention, there is provided a rocker lever assembly, comprising:
a housing;
an operation device mounted in the housing and including a first pivot seat pivotally mounted in the housing, a second pivot seat pivotally mounted in the housing and located under the first pivot seat, and a control lever mounted on the, first pivot seat and the second pivot seat to pivot the first pivot seat and the second pivot seat; and
a switch device mounted in the housing and including:
a base mounted in the housing and having an inside formed with a circular recess having a bottom formed with an annular protruding flange;
a contact terminal embedded in the flange of the base and including two spaced first contact points exposed from the flange of the base and a second contact point located between the first contact points and exposed from the flange of the base;
a contact plate flexibly mounted in the flange of the base and having a periphery rested on the first contact points of the contact terminal and a central portion spaced from the second contact point of the contact terminal; and
a cover plate mounted on the flange of the base and having a central portion formed with an elastic press piece rested on the central portion of the contact plate to press the central portion of the contact plate to contact the second contact point of the contact terminal.
The primary objective of the present invention is to provide a rocker lever assembly, wherein the spring has a first end mounted on the mounting seat of the urging race and a second end mounted on the flange of the base, so that the volume of the rocker lever assembly is reduced largely.
Another objective of the present invention is to provide a rocker lever assembly, wherein the contact slide is displaced on the resistance plate of the casing by guidance of the drive member, thereby greatly enhancing the sensitivity of each of the two sensing variable resistors.
A further objective of the present invention is to provide a rocker lever assembly, wherein the first pivot seat and the second pivot seat are made of wear-resistant material, thereby enhancing the lifetime of the operation device.
A further objective of the present invention is to provide a rocker lever assembly, wherein the switch device is hidden in the housing, thereby reducing the volume of the rocker lever assembly.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring to
The housing 1 is hollow and includes a top plate 14, two adjacent first side plates 10, and two adjacent second side plates 11.
The top plate 14 of the housing 1 is formed with an operation hole 140.
Each of the two first side plates 10 of the housing 1 is bendable and is formed with an opening 101 facing downward.
Each of the two second side plates 11 of the housing 1 is bendable and is formed with an opening 111 facing downward. Each of the two second side plates 11 of the housing 1 is formed with two spaced locking holes 112.
The operation device 2 is mounted in the housing 1 and includes a first pivot seat 20, a second pivot seat 22, and a control lever 21.
The first pivot seat 20 of the operation device 2 has an arch shape and is pivotally mounted in the housing 1. The first pivot seat 20 of the operation device 2 has an inside formed with a guide slot 201 and has a first end formed with a first pivot shaft 202 pivotally mounted in the opening 101 of a first one of the two first side plates 10 of the housing 1 and a second end formed with a second pivot shaft 203 pivotally mounted in the opening 111 of a first one of the two second side plates 11 of the housing 1.
The second pivot seat 22 of the operation device 2 is pivotally mounted in the housing 1 and is located under the first pivot seat 20. The second pivot seat 22 of the operation device 2 is rotatable along a direction perpendicular to that of the first pivot seat 20. The second pivot seat 22 of the operation device 2 has an inside formed with a receiving chamber 220 and has two side walls formed with two shaft holes 221 each communicating with the receiving chamber 220. The second pivot seat 22 of the operation device 2 has a first end formed with a first pivot axle 222 pivotally mounted in the opening 101 of a second one of the two first side plates 10 of the housing 1 and a second end formed with a second pivot axle 223 pivotally mounted in the opening 111 of a second one of the two second side plates 11 of the housing 1.
The control lever 21 of the operation device 2 is mounted on the first pivot seat 20 and the second pivot seat 22 to pivot the first pivot seat 20 and the second pivot seat 22. The control lever 21 of the operation device 2 is slidably mounted in the guide slot 201 of the first pivot seat 20 and has a first end protruding outward from the guide slot 201 of the first pivot seat 20. The control lever 21 of the operation device 2 has a second end pivotally mounted in the receiving chamber 220 of the second pivot seat 22 and formed with a pivot hole 210. A pivot pin 23 is extended through the two shaft holes 221 of the second pivot seat 22 and the pivot hole 210 of the control lever 21, so that the control lever 21 is pivotally mounted on the second pivot seat 22.
In such a manner, the control lever 21 of the operation device 2 is driven to move in two perpendicular directions, so that the first pivot seat 20 and the second pivot seat 22 are driven by the control lever 21 to rotate in two perpendicular directions respectively.
The switch device 3 is mounted in the housing 1 and includes a base 30, a contact terminal 31, a contact plate 32, and a cover plate 33.
The base 30 of the switch device 3 is mounted in the housing 1 and has an inside formed with a circular recess 301. The base 30 of the switch device 3 has a peripheral wall formed with four opposite support studs 302 for supporting the first pivot shaft 202 and second pivot shaft 203 of the first pivot seat 20 and the first pivot axle 222 and second pivot axle 223 of the second pivot seat 22. The circular recess 301 of the base 30 of the switch device 3 has a bottom formed with an annular protruding flange 303.
The contact terminal 31 of the switch device 3 is embedded in the flange 303 of the base 30 and has a side protruding outward from the base 30 and formed with two spaced SMD solder legs 312. The contact terminal 31 of the switch device 3 is integrally coated by the flange 303 of the base 30. The contact terminal 31 of the switch device 3 includes two spaced first contact points 311 exposed from the flange 303 of the base 30 and a second contact point 310 located between the first contact points 311 and exposed from the flange 303 of the base 30.
The contact plate 32 of the switch device 3 is flexibly mounted in the flange 303 of the base 30 and has a periphery rested on the first contact points 311 of the contact terminal 31 and a dome-shaped central portion spaced from the second contact point 310 of the contact terminal 31.
The cover plate 33 of the switch device 3 is mounted on the flange 303 of the base 30 and has a central portion formed with an elastic press piece 330 rested on the central portion of the contact plate 32 to press the central portion of the contact plate 32 to contact the second contact point 310 of the contact terminal 31.
The restoring device 4 is mounted in the housing 1 and includes an urging race 41 rested on a bottom of the first pivot seat 20 of the operation device 2, and a spring 40 urged between the urging race 41 and the base 30 of the switch device 3. The urging race 41 of the restoring device 4 has a side formed with a protruding mounting seat 410 (see
Each of the two sensing variable resistors 5 is mounted on the housing 1 and includes a casing 50, a drive member 51, and a contact slide 52.
The casing 50 of each of the two sensing variable resistors 5 is secured on a respective one of the two second side plates 11 of the housing 1. The casing 50 of each of the two sensing variable resistors 5 has an inside formed with a mounting recess 501 integrally formed with a printing carbon film type resistance plate 502 having a printing track. The resistance plate 502 of each of the two sensing variable resistors 5 has three terminal legs 503 protruding outward from the casing 50 for mounting the rocker lever assembly to other circuit board (not shown). The casing 50 of each of the two sensing variable resistors 5 is formed with two spaced hook-shaped elastic insertion legs 504 each snapped into and locked in a respective one of the locking holes 112 of the respective second side plate 11 of the housing 1. The casing 50 of each of the two sensing variable resistors 5 has a side formed with a mounting hole 505.
The drive member 51 of each of the two sensing variable resistors 5 is rotatably mounted in the casing 50 and secured on a respective one of the second pivot shaft 203 of the first pivot seat 20 and the second pivot axle 223 of the second pivot seat 22 to rotate therewith. The drive member 51 of each of the two sensing variable resistors 5 has a first side formed with a counterbore 512 mounted on a respective one of the second pivot shaft 203 of the first pivot seat 20 and the second pivot axle 223 of the second pivot seat 22 and a second side formed with a support shaft 513 rotatably mounted in the mounting hole 505 of the casing 50. The second side of the drive member 51 of each of the two sensing variable resistors 5 has a periphery formed with a plurality of protruding stubs 511.
The contact slide 52 of each of the two sensing variable resistors 5 is secured on the drive member 51 to rotate therewith and is movably mounted on the resistance plate 502 of the casing 50 along a curved track. The contact slide 52 of each of the two sensing variable resistors 5 has a substantially crescent shape and has a periphery formed with a plurality of through holes 520 mounted on the protruding stubs 511 of the drive member 51.
In operation, when the control lever 21 of the operation device 2 is moved in the operation hole 140 of he top plate 14 of the housing 1, the first pivot seat 20 is driven by the control lever 21 to pivot about the first pivot shaft 202 and second pivot shaft 203 of the first pivot seat 20, and the second pivot seat 22 is driven by the control lever 21 to pivot about the first pivot axle 222 and second pivot axle 223 of the second pivot seat 22, so that when the control lever 21 of the operation device 2 is driven to move in two perpendicular directions, the first pivot seat 20 and the second pivot seat 22 are driven by the control lever 21 to rotate in two perpendicular directions respectively.
At this time, the drive member 51 of each of the two sensing variable resistors 5 is rotated by a respective one of the second pivot shaft 203 of the first pivot seat 20 and the second pivot axle 223 of the second pivot seat 22 to rotate the contact slide 52 which is displaced on the resistance plate 502 of the casing 50 along a curved track, so that the impedance of the resistance plate 502 of the casing 50 is changed so as to change the voltage. In such a manner, the terminal legs 503 of the resistance plate 502 of each of the two sensing variable resistors 5 output the changed voltage respectively.
When a downward force is applied on the control lever 21 of the operation device 2, the first pivot seat 20 and the second pivot seat 22 are pressed to move downward, and the lower end of the second pivot seat 22 is moved downward to press the press piece 330 of the cover plate 33 of the switch device 3, so that the press piece 330 is moved downward to press the contact plate 32 so as to press and move the central portion of the contact plate 32 to contact the second contact point 310 of the contact terminal 31 to operate the switch device 3.
After the downward force applied on the control lever 21 of the operation device 2 is removed, the first pivot seat 20 and the second pivot seat 22 are pushed upward and returned to the original position by the restoring force of the spring 40, so that the contact plate 32 is returned to the original position by its elasticity, thereby detaching the contact plate 32 from the second contact point 310 of the contact terminal 31.
Accordingly, the spring 40 has a first end mounted on the mounting seat 410 of the urging race 41 and a second end mounted on the flange 303 of the base 30, so that the volume of the rocker lever assembly is reduced largely. In addition, the contact slide 52 is displaced on the resistance plate 502 of the casing 50 by guidance of the drive member 51, thereby greatly enhancing the sensitivity of each of the two sensing variable resistors 5. Further, the first pivot seat 20 and the second pivot seat 22 are made of wear-resistant metallic material, thereby enhancing the lifetime of the operation device 2. Further, the switch device 3 is hidden in the housing 1, thereby reducing the volume of the rocker lever assembly.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
