BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is a schematic exploded view of the present invention;
FIG. 2 is a schematic stereogram of the present invention;
FIG. 3 is a schematic sectional view of the present invention; and
FIG. 4 is a schematic sectional view of the metal spring leaf electrically contacting the contact of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
In the following detailed illustration of the present invention, an injection device is taken as an application embodiment of the composite switch of the present invention. However, it is apparent that the accompanying drawings are provided for reference and illustration, and are not intended to limit the scope of the present invention.
FIG. 1 is a schematic exploded view of the present invention. As shown in the figure, a composite switch 100 disclosed by the present invention is applicable in an injection device (not shown). The composite switch 100 outputs two default signals through two different operation actions, and executes the default actions of the injection device. The composite switch 100 of the present invention comprises a housing 110, a pressing member 120, a sensor 130, a first pin 140, an electrical connection portion 150, and a metal spring leaf 160. The housing 110 has an accommodation space 111 and an opening 112. The pressing member 120 is disposed in the opening 112 of the housing 110 and can move within the accommodation space 111. The pressing member 120 has an accommodation portion 121 inside for accommodating the sensor 130. One end of the first pin 140 is disposed in the accommodation portion 121 and is electrically connected to the sensor 130, and the other end is exposed outside the housing 110 and is electrically connected to the injection device. The sensor 130 is used to sense the external changes of the composite switch 100 and outputs a first signal to the injection device, i.e., executes the action of filling liquid. The electrical connection portion 150 is disposed in the accommodation space 111, and has a contact 151 located in the accommodation space 111 and at least one second pin 152 extending from the contact 151. The second pin 152 is exposed outside the housing 110 and is electrically connected to the injection device. The metal spring leaf 160 is disposed between the contact 151 and the pressing member 120 and selectively electrically contacts the contact 151 through pressing the pressing member 120, such that the electrical connection portion 150 outputs a second signal to the injection device, i.e., executes the default action of injecting liquid.
Please refer to FIG. 1, the composite switch 100 further comprises a fixing member 170 fitted on the pressing member 120. The fixing member 170 is fixed at the opening 112 of the housing 110 to confine the moving of the pressing member 120 in a specific range in the accommodation space 11-1. As such, the pressing member 120 can correctly push the metal spring leaf 160 to electrically contact the contact 151, thus conducting a circuit while outputting the second signal, such that the injection device starts injecting liquid.
As shown in FIGS. 1 and 2, the sensor 130 is a pyroelectric IR sensor capable of sensing infrared rays emitted from human bodies. When sensing infrared rays from human bodies, the sensor 130 will generates a signal change to execute the default action of filling liquid. Additionally, the housing of the pressing member 120 is further opened with a through hole 122 corresponding to the sensor 130, for the convenience of the user to press at a corresponding position of the sensor 130. Additionally, in order to protect the sensor 130 from being contaminated by dirty dust which may influence sensitivity, and prevent liquid flowing into the pressing member 120 through the through hole 122 to cause short circuit of the electronic parts of the sensor, a transparent cover 123 is embedded in the through hole 122. The material of the transparent cover 123 can be transparent materials, such as acryl or glass, which will not degrade the sensing efficiency of the sensor 130.
Referring to FIG. 3 and FIG. 4, the sensor 130 is normally electrically connected to the injection device through the first pin 140. Once the finger of the user touches the corresponding position of the sensor 130, the sensor 130 outputs the first signal to make the injection device execute the action corresponding to the first signal. Once the user presses the pressing member 120 and pushes the metal spring leaf 160 to electrically contact the contact 151, and the contact 151 outputs the second signal to the injection device through the second pin 152, the default action corresponding to the second signal is execute.
It should be noted that the first signal output by the sensor disclosed by the present invention relates to executing the default action of filling liquid, and the second signal output by the electrical connection portion relates to executing the default action of injecting liquid. Those skilled in the art can alternate the design of the default function of the two signals to require a two-stage switch to perform operation, and the present invention is not limited to the embodiments of the present embodiment.
Compared with the conventional art, the composite switch disclosed by the present invention can be operated more conveniently and rapidly and can perform the default function correctly, so as to prevent the user from operating by mistake due to inappropriate depressing force.
The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Patent Application
20080000765
