| CPC A61M 5/31576 (2013.01) [A61M 5/31501 (2013.01); A61M 5/31511 (2013.01); A61M 2005/3152 (2013.01); A61M 2005/31588 (2013.01); A61M 2205/8206 (2013.01)] | 13 Claims |
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1. An electric injection device, comprising:
an outer case comprising a first case, a second case and a syringe head base, in which the first case is installed under the second case for hand holding, and the syringe head base is installed outside the second case, wherein the first case and the second case can be arbitrarily disassembled, wherein the first case is arranged vertically and the second case is arranged horizontally so that the outer case is gun-shaped, wherein the first case and the second case are respectively installed with a pivot end and a locking end, and the pivot end is applied to pivotally connected to the second case, while the locking end is locked to the second case by means of a locking element, the pivot end can be dismantled from the second case after releasing the locking element thereby disassembling the first case and the second case;
a drive mechanism, installed within the first case and including a drive motor and a drive gear block driven by the drive motor;
a transmission mechanism, installed within the first case and including a gear set meshing with the drive gear block and a push block driven by the gear set;
a linkage mechanism, installed within the first case and including a first linkage rod, a reciprocating linkage rod, a reciprocating elastic element and a second linkage rod, wherein a first fulcrum is installed on the first linkage rod, one end of the first linkage rod is configured as a swing end, the first fulcrum is pivotally installed on the inner side of the outer case and close to without being connected to the push block so that the swing end is located on the path where the push block rotates, the positions close to the two ends of the reciprocating linkage rod are respectively configured with a first pivot point and a second pivot point, the other end of the first linkage rob away from the swing end is pivotally installed to the first pivot point, and the reciprocating elastic element is installed beside the first pivot point, the two ends of the reciprocating elastic element respectively abut against the inner side of the outer case and beside the first pivot point of the reciprocating linkage rod, a second fulcrum is configured on the second linkage rod, and a brake end is installed on one end of the second linkage rod, the other end of the second linkage rod away from the brake end is pivotally installed to the second pivot point, and wherein the distance from the swing end to the first fulcrum is longer than the distance from the first fulcrum to the first pivot point of the reciprocating linkage rod, and the distance from the second pivot point of the reciprocating linkage rod to the second fulcrum is longer than the distance from the second fulcrum to the brake end, and when the push block rotates and pushes the swing end, the brake end performs reciprocating movements; and
a push mechanism, installed within the second case and including a first stop block, a second stop block, a pushing shaft and a pushing element, in which the first stop block and the second stop block are installed parallel to each other on the inner side of the second case, the pushing shaft is installed through the first stop block and the second stop block at the same time, a pressure board is installed at the end of the pushing shaft so that a syringe can be installed between the syringe head base and the pressure board, and in which the pushing element has a hole for the pushing element to wrap around the pushing shaft via the hole correspondingly between the brake end and the first stop block, the outer side of the pushing element is further formed with a push end extending next to the brake end, the push end is applied to be pushed by the brake end thus further driving the pushing element, and one or more abutting blocks are installed inside the second case so that the one or more abutting blocks and the brake end are respectively located on the same side of the pushing element, wherein a first abutting elastic element wrapped around the pushing shaft is located on the other side of the pushing element, and the two ends of the first abutting elastic element respectively abut against the pushing element and one side of the first stop block thereby pushing the pushing element against the one or more abutting blocks and the brake end, and the outer diameter of the hole on the pushing element is larger than that of the pushing shaft such that the pushing element will become inclined when the brake end pushes the pushing element, and, during such an inclination condition, the upper and lower edges of the hole will clamp the upper and lower surfaces of the pushing shaft to move, and then the pushing shaft can be driven to push in one direction when the pushing element is continuously pushed, so that the continuous reciprocating action of the brake end makes the pushing shaft drive the pressure board to continuously press the syringe, wherein a back stop element which includes a back stop hole is provided and wrapped around the pushing shaft via the back stop hole correspondingly between the pressure board and the second stop block, and the inside of the outer case is also installed with a back stop fulcrum and a release blockage which are respectively located on the same side of the back stop element; in addition, wherein a second abutting elastic element wrapped around the pushing shaft and a resetting block positioned under the second abutting elastic element are provided on the other side of the back stop element, wherein the two ends of the second abutting elastic element respectively abut against the back stop element and one side of the second stop block thereby pushing the back stop element against the back stop fulcrum and the release blockage and allowing tilting the back stop element.
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