CN213759981U - Injection structure with sound prompt function and injection device - Google Patents

Abstract

The utility model relates to an injection structure with sound prompt function and an injection device, wherein the injection structure comprises a fixed sleeve; a needle tube; a piston tube; a piston; the moving rod is embedded in the fixed sleeve and can axially slide relative to the fixed sleeve, and a groove is formed in the moving rod; the fixed block is fixedly arranged on the fixed sleeve, faces to the notch of the groove and is positioned on the moving path of the groove; the elastic piece acts on the moving rod to ensure that the moving rod keeps the trend that the groove on the moving rod moves towards the fixed block; the locating piece is arranged between the moving rod and the piston tube, and under the condition that the piston is pushed to the bottom of the needle tube by the piston tube, the locating piece releases the constraint on the moving rod, so that the groove moves towards the direction of the fixed block until the fixed block collides with the bottom wall of the groove to trigger the sound indicating the completion of injection, and the injection completion of a user is prompted.

Description

Injection structure with sound prompt function and injection device

Technical Field

The utility model belongs to the technical field of medical appliances, concretely relates to injection structure and injection device with sound prompt facility.

Background

The most common way of administering drugs is by injection, e.g. intravenous, subcutaneous or intramuscular injection, where syringes containing the drug are used for injection, which is usually performed by trained medical personnel. In some cases, where it is desirable to inject drugs on a regular basis, it is desirable for a patient or other individual to use a syringe to self-inject or to inject other individuals, and devices for automatic injection have been developed to allow the patient to self-inject.

However, since the patient is usually neither a nurse nor a person educated in the medical device setting, such a device for automatic injection must prove to be simple and safe to use. It is therefore important for the user to be informed that the product has started injection, that the injection has been substantially completed and that the user can pull the device from the injection site.

As shown in "an automatic injection device" disclosed in chinese patent application with patent No. CN202010409755.2 (publication No. CN111450356A), when the injection training device starts injecting, the sounding element can swing under the driving of the movable sleeve to get rid of the constraint of the positioning structure, so as to quickly move downwards to impact on the side wall of the chute of the fixed sleeve and make a sound to remind the user of starting injecting, thereby improving the reliability and safety of the user using the injection device.

However, the injection device cannot give a prompt to the user when the injection is completed to inform the user of the end of the injection, and thus is in need of further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is to prior art's current situation, provides one kind and can make a sound when the injection is accomplished in order to point out user's injection structure with sound prompt facility.

The second technical problem to be solved by the present invention is to provide an injection device using the above injection structure.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: an injection structure with sound prompt function comprises

Fixing a sleeve;

the needle tube is fixedly arranged below the fixed sleeve;

the piston tube is arranged on the fixed sleeve and can move axially relative to the fixed sleeve, and the lower end of the piston tube is inserted into the needle tube;

the piston is arranged in the needle tube and can be pushed downwards by the piston tube;

it is characterized by also comprising

The moving rod is embedded in the fixed sleeve and can axially slide relative to the fixed sleeve, and a groove is formed in the moving rod;

the fixed block is fixedly arranged on the fixed sleeve, faces to the notch of the groove and is positioned on the moving path of the groove;

the elastic piece acts on the moving rod to ensure that the moving rod keeps the trend that the groove on the moving rod moves towards the fixed block;

the positioning piece is arranged between the moving rod and the piston tube, and under the condition that the piston is pushed to the bottom of the needle tube by the piston tube, the positioning piece releases the constraint on the moving rod, so that the groove moves towards the direction of the fixed block until the fixed block collides with the bottom wall of the groove to trigger the sound indicating the completion of injection.

The positioning piece can have various structural forms, the structure is simple, the positioning piece is a buckling foot, the buckling foot is connected with the fixed sleeve, and the front surface of the buckling foot is buckled in the groove and is abutted against the groove in the state that the back surface of the buckling foot is abutted against the peripheral wall of the piston tube.

In order to enable the front face of the buckling foot to abut against and block the groove, a third inclined plane with the wall thickness gradually becoming thinner along the injection direction of the piston tube is arranged on the buckling foot, and a fourth inclined plane matched with the third inclined plane is arranged on the groove.

In order to facilitate the connection of the fixing sleeve and the buckling feet, the fixing sleeve is provided with a connecting block, the connecting block is connected with the buckling feet through a connecting arm, and the connecting arm extends along the axial direction of the piston tube.

In order to facilitate the moving rod to move under the action of the elastic part, the elastic part is a tension spring, a first positioning block is arranged on the fixed sleeve, a second positioning block is arranged on the moving rod, and two ends of the tension spring are respectively arranged on the first positioning block and the second positioning block.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: an injection device using the above injection structure, characterized in that: the needle tube is characterized by further comprising a tube body, and the fixing sleeve and the needle tube are both fixedly arranged in the tube body.

Compared with the prior art, the utility model has the advantages that: the utility model discloses a set up the carriage release lever to be equipped with the setting element between carriage release lever and piston tube, when the piston was pushed away the needle tubing bottom by the piston tube, the liquid medicine in the needle tubing was released completely this moment, the injection is accomplished, the setting element is liberated and is tied to the carriage release lever, make the carriage release lever remove under the effect of elastic component, because the fixed block is located the removal route of the recess on the carriage release lever, so the fixed block can send sound with the diapire striking of recess, this sound suggestion user injection is accomplished, the reliability and the security that injection device used have further been improved.

Drawings

Fig. 1 is a schematic structural diagram of an injection device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

FIG. 3 is a schematic view of the travel bar of FIG. 2;

FIG. 4 is a schematic view of the assembly of the stationary sleeve and the travel bar of FIG. 2;

FIG. 5 is a cross-sectional view of the retaining sleeve, travel bar, piston tube, etc. of FIG. 2 (with the snap legs disposed in the grooves);

fig. 6 is a cross-sectional view of the retaining sleeve, travel rod, piston tube, etc. of fig. 2 (with the snap legs disengaged from the grooves).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 6, for convenience of understanding, the difference between the injection device with sound prompt function of the present embodiment and CN202010409755.2 is that in the present embodiment, an injection structure capable of emitting sound when injection is completed is added in addition to CN202010409755.2, and the other structures of the injection device of the present embodiment can be referred to CN202010409755.2, and the newly added injection structure is provided in the tube body 1 (which is the same component as the tube body 1 in CN 202010409755.2).

The injection structure with the sound prompt function of the present embodiment includes a hub 3 (the same component as the hub 3 in CN 202010409755.2), a needle tube 65 (the same component as the needle tube 65 in CN 202010409755.2), a piston tube 61 (the same component as the piston tube 61 in CN 202010409755.2), a piston 62 (the same component as the piston 62 in CN 202010409755.2), a moving rod 7, an elastic piece 72, a positioning piece, and a fixed piece 38.

The needle tube 65 is fixedly disposed below the hub 3, the needle tube 65 and the hub 3 are both fixedly disposed in the tube body 1, the piston tube 61 is movably disposed in the hub 3 up and down (i.e., the piston tube 61 is movable in the axial direction with respect to the hub 3), the lower end of the piston tube 61 is inserted into the needle tube 65, and the piston 62 is disposed in the needle tube 65 and can be pushed down by the piston tube 61, which is disclosed in CN 202010409755.2.

In this embodiment, the positioning element is a fastening pin 37, the fixing sleeve 3 is provided with a connecting block 371, the connecting block 371 and the fastening pin 37 are connected through a connecting arm 372, and the connecting arm 372 extends along the axial direction of the piston tube 61.

The moving rod 7 is embedded in the fixing sleeve 3 and can move up and down relative to the fixing sleeve 3 (see fig. 4, the dotted line shows the moving rod 7, the moving rod 7 can move axially relative to the fixing sleeve 3), a groove 71 with an upward notch is formed in the moving rod 7, the moving rod 7 keeps a trend of moving upwards under the action of an elastic part 72, in this embodiment, the elastic part 72 is a tension spring, the fixing sleeve 3 is provided with a first positioning block 721, the moving rod 7 is provided with a second positioning block 722, and two ends of the tension spring are respectively installed on the first positioning block 721 and the second positioning block 722.

The front surface of the fastening leg 37 is fastened in the groove 71 and abuts against the groove 71 in a state where the rear surface of the fastening leg 37 abuts against the outer peripheral wall of the piston tube 61. As shown in fig. 5 and 6, the retaining pin 37 is provided with a third inclined surface 373 whose wall thickness becomes gradually thinner along the injection direction (from top to bottom) of the piston tube 61, the groove 71 is provided with a fourth inclined surface 711 that is in inclined engagement with the third inclined surface 373, and in a state where the third inclined surface 373 and the fourth inclined surface 711 are in contact, the retaining pin 37 is pressed by the moving rod 7 toward the piston tube 61, so that the retaining pin 37 is pressed against the outer peripheral wall of the piston tube 61.

As shown in fig. 2 and 6, the fixing sleeve 3 is fixedly provided with a fixing block 38, the fixing block 38 faces the notch of the groove 71 and is positioned right above the notch of the groove 71, i.e., the fixed block 38, is located on the upward movement path of the groove 71 of the moving rod 7, when the piston tube 61 is moved downward out of contact with the catch 37, the locking legs 37 are able to move inwards (towards the position where the piston tube 61 was originally located), at which point the locking legs 37 are unable to fully position the travel bar 7, the travel bar 7 is moved upwards by the elastic member 72, the fourth ramp 711 further presses against the third ramp 373 during the movement of the moving rod 7, so that the catch 37 swings further inwards (towards the position where the piston tube 61 was originally located) and finally disengages from the groove 71, and the moving rod 7 continues to move upwards under the action of the elastic element 72 until the impact of the fixed block 38 with the bottom wall of the groove 71 produces a sound indicating the completion of the injection.

Before piston 62 moves to the bottom of needle tube 65, retaining pin 37 is retained in groove 71, as shown in FIG. 5;

when the piston 62 moves to the bottom of the needle tube 65, the liquid medicine is completely pushed out, the piston tube 61 is separated from the button leg 37, the button leg 37 can move towards the position where the piston tube 61 is located, so that the button leg 37 is separated from the groove 71, and meanwhile, the moving rod 7 moves upwards under the action of the elastic element 72 until the fixed block 38 collides with the bottom wall of the groove 71 to make a sound indicating that the injection is completed, and the injection is completed, as shown in fig. 6.

As shown in fig. 2, the moving rod 7, the elastic element 72, etc. are all embedded in the fixed sleeve 3, so that they do not interfere with the movement of the movable sleeve 4.

Claims (6)

1. An injection structure with sound prompt function comprises

A fixed sleeve (3);

the needle tube (65) is fixedly arranged below the fixed sleeve (3);

the piston tube (61) is arranged in the fixed sleeve (3) and can move axially relative to the fixed sleeve (3), and the lower end of the piston tube (61) is inserted in the needle tube (65);

a piston (62) disposed in the needle tube (65) and pushed downward by the piston tube (61);

it is characterized by also comprising

The moving rod (7) is embedded on the fixed sleeve (3) and can axially slide relative to the fixed sleeve (3), and a groove (71) is formed in the moving rod (7);

the fixed block (38) is fixedly arranged on the fixed sleeve (3), and the fixed block (38) faces to the notch of the groove (71) and is positioned on the moving path of the groove (71);

the elastic piece (72) acts on the moving rod (7) to enable the moving rod (7) to keep the trend that the groove (71) on the moving rod moves towards the fixed block (38);

and the positioning piece is arranged between the moving rod (7) and the piston tube (61), and under the condition that the piston (62) is pushed to the bottom of the needle tube (65) by the piston tube (61), the positioning piece releases the constraint on the moving rod (7), so that the groove (71) moves towards the fixed block (38) until the fixed block (38) collides with the bottom wall of the groove (71) to trigger the sound indicating the completion of injection.

2. The injection structure with sound prompt function according to claim 1, wherein: the locating piece is a buckling pin (37), the buckling pin (37) is connected with the fixed sleeve (3), and the front surface of the buckling pin (37) is buckled in the groove (71) and abutted against the groove (71) in the state that the back surface of the buckling pin (37) is abutted against the peripheral wall of the piston tube (61).

3. The injection structure with sound prompt function according to claim 2, characterized in that: the buckling foot (37) is provided with a third inclined surface (373) with the wall thickness gradually becoming thinner along the injection direction of the piston tube (61), and the groove (71) is provided with a fourth inclined surface (711) matched with the third inclined surface (373).

4. The injection structure with sound prompt function according to claim 2, characterized in that: be equipped with connecting block (371) on fixed cover (3), connecting block (371) link to each other through linking arm (372) with detaining between foot (37), axial extension along piston tube (61) is followed in linking arm (372).

5. The injection structure with sound prompt function according to claim 1, wherein: the elastic part (72) is a tension spring, a first positioning block (721) is arranged on the fixing sleeve (3), a second positioning block (722) is arranged on the moving rod (7), and two ends of the tension spring are respectively arranged on the first positioning block (721) and the second positioning block (722).

6. An injection device using the injection structure of any one of claims 1 to 5, wherein: still include body (1), fixed cover (3) and needle tubing (65) are all fixed to be located in body (1).

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