Mechanical locking mechanism and injector head employing the mechanism
First Claim
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1. A mechanical locking mechanism for stopping a movable shaft capable of reciprocation, comprising:
- movable shaft drive means for converting rotary motion of a drive to motion of a prescribed direction in order to supply reciprocation to said movable shaft; and
safety means for restraining rotation of a rotary shaft of said drive by a mechanical operation when said movable shaft moves beyond a predetermined position.
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Abstract
This injector head 1000 comprises a plunger 20 capable of reciprocating in a direction of movement of a piston 1a in a syringe 1, a plunger drive 500 for converting rotary motion of a plunger motor 2 to linear motion in order to supply reciprocation to this plunger 20, and a safety device 600 as safety means for restraining rotation of a rotary shaft 2a of the plunger motor 2 when the plunger 20 moves beyond a predetermined position. Thus, it is possible to provide a medical injector head attaining miniaturization and simplification of the apparatus while keeping a mechanical safety mechanism.
8 Citations
14 Claims
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1. A mechanical locking mechanism for stopping a movable shaft capable of reciprocation, comprising:
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movable shaft drive means for converting rotary motion of a drive to motion of a prescribed direction in order to supply reciprocation to said movable shaft; and
safety means for restraining rotation of a rotary shaft of said drive by a mechanical operation when said movable shaft moves beyond a predetermined position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An injector head provided therein with a syringe filled with a contrast medium, comprising:
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a plunger capable of reciprocating in a direction of movement of a piston in said syringe;
plunger drive means for converting rotary motion of a motor to linear motion in order to supply reciprocation to said plunger; and
safety means for restraining rotation of a rotary shaft of said motor by a mechanical operation when said plunger moves beyond a predetermined position. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification