CN104474602B - Constant-force spring type medical infusion apparatus - Google Patents

Abstract

A spring-type medical infusion device with constant force, comprising a gear transmission mechanism, a rack and pinion transmission mechanism, a ratchet mechanism and an auxiliary mechanism. The gear transmission mechanism includes a running wheel, the first gear, the second gear, the first rotating shaft and the second rotating shaft; the rack and pinion transmission mechanism includes a constant force spring, a barrel, a bar wheel, a rack, a guide bar and a pressing plate; a ratchet mechanism It includes a ratchet, a stop pawl and a compression spring; the auxiliary mechanism includes a device body, a fastening plate, a lock, and a resistance adjusting screw. Rotate the wheel to store energy for the constant force mainspring, and the ratchet starts and stops to tighten the constant force mainspring, and then the constant force mainspring drives the barrel to rotate, and then the barrel wheel welded with the barrel to rotate, the barrel wheel It forms a rotating pair with the second rotating shaft, and the movement of the two does not interfere with each other, so that the rack drives the pressing plate to move under the drive of the rack wheel. By adopting the invention, the infusion can be performed by artificially applying pressure instead of atmospheric pressure difference, the infusion speed is stable and can be worn on the waist, so that the patient can move conveniently.

Description

A kind of constant force clockwork medical infusion set

technical field

The invention relates to a medical transfusion device, in particular to a constant force clockwork medical transfusion device.

Background technique

Intravenous infusion is an important treatment method commonly used in clinical practice, and it is a large-dose injection that is infused into the body by intravenous infusion. When in use, the drip rate is adjusted through the infusion set, and it enters the vein continuously and steadily to replenish body fluids, electrolytes or provide nutrients. Although the use of plastic infusion bottles or bags is popularized at present, the traditional infusion method remains unchanged, that is, the medicine is injected into the human body by using the difference in atmospheric pressure. It is easy to cause unstable liquid flow rate, which may cause infusion interruption or even blood backflow into the infusion tube.

Contents of the invention

The technical problem to be solved by the present invention is to provide a constant-force spring-type medical infusion set, which can be worn on the waist, so that the patient can move easily, maintain a relatively stable liquid flow rate, and has a reasonable structure and easy operation.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a constant force clockwork medical infusion set, comprising a gear transmission mechanism, a rack and pinion transmission mechanism, a ratchet mechanism and an auxiliary mechanism, the specific structure and connection method are:

The gear transmission mechanism includes a running wheel, a first gear, a second gear, a first rotating shaft and a second rotating shaft, the running wheel is welded on the top of the first rotating shaft, the first gear and the first rotating shaft are connected by a key, the second gear and the second rotating shaft The two rotating shafts are connected by a key, and the first gear and the second gear mesh with each other;

The rack and pinion transmission mechanism includes a constant force spring, a barrel, a rack wheel, a rack, a guide bar and a pressing plate. The inner end of the constant force spring is fixed on the second rotating shaft, and the outer end is affixed to the inner wall of the barrel. The lower end surface of the box is welded on the end surface of the rack wheel, and the rack wheel and the second rotating shaft are gapped to form a rotating pair. The rack and guide bar are symmetrically welded on both sides of the pressure plate, and the two sides cooperate with the device body to form a moving pair. The rack wheel and the rack meshing with each other;

The ratchet mechanism includes a ratchet, a stop pawl and a compression spring, the ratchet is in interference fit with the second rotating shaft, one end of the stop pawl is hinged with the device body, the other end is in contact with the ratchet, one end of the compression spring is fixed on the device body, and the other end is connected to the device body. stop pawl connection;

The auxiliary mechanism includes a device body, a fastening plate, a locking buckle and a resistance adjusting screw, one end of the fastening plate is hinged to the device body, the locking buckle is hinged to the device body, and the resistance adjusting screw is matched with the threaded through hole on the side of the device body.

The device body is provided with a loading cavity and a wearing ring.

The outstanding advantages of the present invention are:

1. The infusion device can be worn on the waist during infusion, instead of holding the infusion bottle high, so that the patient can move more conveniently;

2. Artificially applying stable pressure instead of atmospheric pressure, making the infusion flow rate more stable, avoiding interruption of infusion or even blood backflow into the infusion tube;

3. The infusion tube no longer needs to be connected with the air to prevent germs from entering the liquid medicine.

Description of drawings

Fig. 1 is a schematic structural view of the constant force clockwork medical infusion set of the present invention.

Fig. 2 is a three-dimensional view of the constant force clockwork medical infusion set of the present invention.

Fig. 3 is a schematic diagram of the device body structure of the constant force clockwork medical infusion set of the present invention.

The marks in the figure are: device body 1, rack 2, guide bar 3, first gear 4, first rotating shaft 5, second gear 6, stop pawl 7, compression spring 8, second rotating shaft 9, ratchet 10, wearing Ring 11, resistance adjusting screw 12, fastening plate 13, lock buckle 14, pressing plate 15, bar wheel 16, constant force mainspring 17, barrel box 18, runner 19, loading cavity 20.

detailed description

The technical solutions of the present invention will be further described below through the accompanying drawings and embodiments.

As shown in Figures 1 to 3, a constant-force clockwork medical infusion set according to the present invention includes a gear transmission mechanism, a rack and pinion transmission mechanism, a ratchet mechanism and an auxiliary mechanism. The specific structure and connection method are:

Described gear transmission mechanism comprises running wheel 19, first gear 4, second gear 6, first rotating shaft 5 and second rotating shaft 9, and running wheel 19 is welded on the top of first rotating shaft 5, and first gear 4 and first rotating shaft 5 Through the key connection, the second gear 6 and the second rotating shaft 9 are connected through the key, and the first gear 4 and the second gear 6 mesh with each other;

Described rack and pinion transmission mechanism comprises constant force mainspring 17, bar box 18, bar wheel 16, tooth rack 2, guide bar 3 and pressing plate 15, and constant force mainspring 17 inner end is fixed on the second rotating shaft 9, and outer end It is fixedly connected with the inner wall of the barrel box 18, the lower end surface of the barrel box 18 is welded on the end surface of the barrel wheel 16, the barrel wheel 16 and the second rotating shaft 9 are gapped to form a rotating pair, and the rack 2 and the guide bar 3 are symmetrically welded on both sides of the pressure plate 15, And the two sides cooperate with the device body 1 to form a moving pair, and the rack wheel 16 and the rack 2 are meshed with each other;

The ratchet mechanism includes a ratchet 10, a stop pawl 7 and a compression spring 8, the ratchet 10 is in interference fit with the second rotating shaft 9, one end of the stop pawl 7 is hinged with the device body 1, the other end is in contact with the ratchet 10, and one end of the compression spring 8 It is fixed on the device body 1, and the other end is connected with the stop pawl 7;

The auxiliary mechanism includes a device body 1, a fastening plate 13, a locking buckle 14 and a resistance adjusting screw 12, one end of the fastening plate 13 is hinged to the device body 1, the locking buckle 14 is hinged to the device body, and the resistance adjusting screw 12 is connected to the device body 1 Threaded through-holes on the side fit.

The device body 1 is provided with a loading chamber 20 and a wearing ring 11 .

Working principle and process:

Rotate the runner 19 clockwise, the first rotating shaft 5 drives the first gear 4, thereby drives the second gear 6, and the second gear 6 drives the second rotating shaft 9 to rotate, so that the constant force mainspring 17 fixedly connected with the second rotating shaft 9 Tighten the energy storage, and the ratchet mechanism starts and stops during the energy storage process. During the tightening process of the constant force spring 17, the bar box 18 and the bar wheel 16 rotate thereupon, and the bar wheel 16 drives the tooth bar 2 to make the pressing plate 15 rise.

Put the infusion bottle in the loading chamber 20, close the fastening plate 13 and lock it with the lock buckle 14, release the runner 19, because the resistance adjusting screw 12 can be connected with the guide bar after passing through the threaded hole on the side of the device body 1 3 Side contact increases the sliding resistance of the guide bar 3, so the speed at which the pressure plate 15 is pressed down can be controlled by adjusting the resistance adjusting screw 12, thereby controlling the flow rate of the medicinal solution.

Claims (2)

1. A constant force clockwork type medical infusion set, comprising gear transmission mechanism, rack and pinion transmission mechanism, ratchet mechanism and auxiliary mechanism, is characterized in that, concrete structure and connection mode are: The gear transmission mechanism includes a running wheel, a first gear, a second gear, a first rotating shaft and a second rotating shaft, the running wheel is welded on the top of the first rotating shaft, the first gear and the first rotating shaft are connected by a key, the second gear and the second rotating shaft The two rotating shafts are connected by a key, and the first gear and the second gear mesh with each other; The rack and pinion transmission mechanism includes a constant force spring, a barrel, a rack wheel, a rack, a guide bar and a pressing plate. The inner end of the constant force spring is fixed on the second rotating shaft, and the outer end is affixed to the inner wall of the barrel. The lower end surface of the box is welded on the end surface of the rack wheel, and the rack wheel and the second rotating shaft are gapped to form a rotating pair. The rack and guide bar are symmetrically welded on both sides of the pressure plate, and the two sides cooperate with the device body to form a moving pair. The rack wheel and the rack meshing with each other; The ratchet mechanism includes a ratchet, a stop pawl and a compression spring, the ratchet is in interference fit with the second rotating shaft, one end of the stop pawl is hinged with the device body, the other end is in contact with the ratchet, one end of the compression spring is fixed on the device body, and the other end is connected to the device body. stop pawl connection; The auxiliary mechanism includes a device body, a fastening plate, a locking buckle and a resistance adjusting screw, one end of the fastening plate is hinged to the device body, the locking buckle is hinged to the device body, and the resistance adjusting screw is matched with the threaded through hole on the side of the device body. 2. A constant force clockwork medical infusion set according to claim 1, characterized in that a loading cavity and a wearing ring are provided on the device body.