CN211214914U - Rotary gynecological drug delivery device - Google Patents

Abstract

The utility model relates to a medical article, in particular to a rotary gynecological drug delivery device, which consists of a drug tube assembly and a push injection assembly; the drug tube assembly comprises a sleeve and a piston, wherein the side wall of the sleeve is provided with a side hole, and the rear end of the sleeve is provided with a flange; a stud is fixed on the front side of the piston, a blind hole is formed in the rear side of the piston, and the stud can only rotate reversely when the medicine tube assembly is in an initial state; the push injection assembly comprises a mounting sleeve, a guide seat and a push rod; the rear part of the mounting sleeve is provided with a mounting hole, the front side of the mounting hole is provided with a leading-out hole, the mounting sleeve is provided with a locking mechanism, and the guide seat is provided with an inserting part and a threaded hole; the push rod is in threaded fit with the threaded hole, the front end of the push rod is provided with a plug, and the rear end of the push rod is fixed with a twisting handle and a pressing handle; when the position of the guide seat is kept fixed, the push rod of the pressing handle is pushed forwards to drive the stud to rotate forwards. Its structural design is reasonable, and convenient to use is swift, can rotate the formula and dose, has increased medicine and affected part area of contact, has improved drug efficiency, has wide popularization prospect.

Description

Rotary gynecological drug delivery device

Technical Field

The utility model relates to a medical supplies especially relates to a device of dosing for gynaecology's disease treatment.

Background

Clinically, the external medicament is placed in the vagina, is an important treatment means for various gynecological diseases, particularly vaginitis, is convenient to operate, directly acts on an affected part to take effect quickly, is accepted by patients, is the most commonly used gynecological external medicament at present, is gel, and is placed in the vagina of the patients by means of a medicament delivery device when in use. The existing drug delivery device usually discharges the drug from the front end by means of a piston, and due to the unreasonable structural design and the dual limitations of physiological characteristics of affected parts, when the gel is placed in the vagina of a patient, the gel cannot be uniformly distributed on the vaginal wall at all, but keeps in a ball shape for a long time, the contact area with the affected part is extremely limited, and the gel cannot be quickly dissolved and absorbed. Meanwhile, the medicine is mostly applied to the patient during the sleep period, the body is in a static state, and the gel is dissolved and then is only distributed on one side of the vagina, so that the gel cannot be fully contacted with the affected part, and the treatment effect of gynecological diseases is reduced. In the prior art, also there is not enough technical scheme to have adopted the mode of seting up the side opening at the sleeve pipe lateral wall to in the medicament can be discharged all around from the sleeve pipe, this structure though can improve the not enough of traditional ware front end discharge of dosing in theory, nevertheless can not guarantee the whole journey of every side opening and discharge medicine in the whole injection in-process, and the unable even coating in disease position of medicament through the side opening discharge, the effect that produces is not showing in practical clinical application, and then not widely popularized and applied.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problem, the utility model provides a can be with the even discharge of medicament to make the medicament tend to even coating on the vaginal wall through rotatory, increase medicament and affected part area of contact from this, improve the gynaecology of rotation type device of dosing of medicine absorption efficiency.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a rotary gynecological drug delivery device comprises a drug tube assembly and a push injection assembly; the cartridge assembly includes the sleeve pipe, is located the intraductal piston of sleeve, its characterized in that: the front end of the sleeve is closed, a plurality of side holes are uniformly distributed on the side wall of the middle front section, and a flange is arranged at the rear end; a stud is fixed on the front side of the piston, an annular cavity is formed between the outer wall of the stud and the inner wall of the sleeve, and a non-circular blind hole is formed in the rear side of the piston; a first partition plate which extends forwards and backwards and of which the inner side end is in contact with the outer wall of the stud is arranged on the inner side wall of the front section in the sleeve, and a second partition plate which extends forwards and backwards and of which the outer side end is in contact with the inner wall of the sleeve is arranged on the outer wall of the stud; gel is filled in the front area of the piston in the inner cavity of the sleeve, and a plastic film for covering the side hole is coated outside the sleeve; when the front end of the stud is abutted against the front end of the sleeve, the piston is just contacted with the rear end of the first partition plate, and the first partition plate and the second partition plate respectively partition the annular cavity along the axial direction; when the cartridge assembly is in an initial state, the rear end part of the first partition plate is attached to the front end part of the second partition plate, so that the stud can only rotate reversely under the condition that the position of the sleeve is fixed; the push injection assembly comprises a mounting sleeve, a guide seat and a push rod; the rear part of the mounting sleeve is a cylindrical mounting hole which can accommodate the flange, the front side of the mounting hole is a guide hole which is smaller than the diameter of the mounting hole and is used for the sleeve to pass through, and a thrust bearing used for abutting against the front side surface of the flange is arranged on the annular front end wall of the mounting hole; the mounting sleeve is provided with a locking mechanism with locking and unlocking states, the sleeve and the mounting sleeve cannot rotate relatively in the locking state, and the relative rotation of the sleeve and the mounting sleeve is not hindered in the unlocking state; the guide seat is provided with a truncated cone-shaped insertion part and a threaded hole which penetrates through the guide seat from front to back; when the guide seat is combined with the mounting sleeve, the insertion part is inserted into the rear end part of the mounting hole, the guide seat and the mounting sleeve can rotate relatively at the moment, the whole appearance is cylindrical, and the space between the insertion part and the thrust bearing is enough for accommodating the flange; the push rod is provided with a guide thread which penetrates through the threaded hole and is in threaded fit with the threaded hole, the front end of the push rod is provided with a plug which can be spliced and combined with the blind hole, the rear end of the push rod is fixed with a twisting handle, and the rear side of the twisting handle is provided with a pressing handle which is rotationally connected with the push rod; when the guide seat is kept fixed and the plug is combined with the blind hole, the pressing handle is pushed forwards, and the push rod drives the stud to rotate forwards.

The working principle and the using method of the rotary gynecological drug delivery device are as follows:

when in use, the medicine tube assembly is inserted into the mounting sleeve to ensure that the sleeve extends to the front of the mounting sleeve from the guide-out hole and the flange is positioned in the mounting hole; inserting a plug at the front end of the push rod into a blind hole at the rear side of the piston, and rotating to adjust the axial position of the guide seat to enable the insertion part of the guide seat to be inserted into the rear end part of the placement hole to realize the combination of the placement sleeve and the guide seat; tearing off the plastic film coated on the sleeve, holding the mounting sleeve and the guide seat to prevent the mounting sleeve and the guide seat from being separated, and placing the sleeve into the vagina of a patient; the pressing handle is pushed forwards, on one hand, the sleeve is limited by the mounting sleeve and cannot move forwards, the piston moves forwards in the sleeve to drive the gel on the front side of the sleeve to be discharged from the side hole, on the other hand, the guide seat and the mounting sleeve are held together and cannot rotate relatively, the forward movement process of the push rod drives the stud to rotate forwards under the guidance of the guide thread and the screw hole, the sleeve synchronously rotates along with the stud under the matching of the first partition plate and the second partition plate, and the pushing bearing can reduce the rotation resistance of the sleeve; therefore, in the process of pushing the pressing handle forwards, the piston moves forwards to enable all the side holes to continuously discharge gel, and the sleeve rotates to enable the discharged gel to be more uniformly dispersed and smeared on the vaginal wall; when the push rod cannot move forwards, the front end of the stud reaches the bottom of the front end of the sleeve, at the moment, gel is only stored in the annular cavity, the locking mechanism is adjusted to be in a locking state, so that the sleeve and the placement sleeve cannot rotate relatively, the placement sleeve is independently held to rotate the twisting handle, the push rod drives the stud to rotate reversely in the sleeve, the second partition plate is driven by the stud to rotate towards the other side of the first partition plate, and the gel in the annular cavity is discharged until the gel is completely discharged; and finally, the medicine tube assembly is drawn out of the body of the patient, and the whole administration operation is finished.

Compared with the prior art, the rotary gynecological drug delivery device has the following technical effects:

in the administration process, all the side holes can continuously discharge the gel, and the sleeve rotates to ensure that the discharged gel is more uniformly dispersed and smeared on the vaginal wall, so that the contact area between the gel and the affected part is increased, and the medicine can directly act on the affected part and can be quickly absorbed and utilized; meanwhile, as the gel is discharged through the plurality of uniformly distributed side holes, the discharged gel is flocculent, and is more beneficial to dissolution compared with the previous conglobation, thereby improving the drug absorption efficiency; because the function of the medicine tube assembly is packing gel and releasing the gel in the patient, so it should adopt the disposable requirement to process, and inject the subassembly and be used for providing the required power of gel release for the medicine tube assembly, and do not contact with the patient, so it can recycle, inject the subassembly promptly and can cooperate a plurality of medicine tube assemblies to recycle, disposable medicine tube assembly because of need not to set up the piston rod, need not to set up and hold the part and can correspondingly shorten length, it is simpler than current disposable ware structure of dosing, the cost is cheaper, make this rotation type gynaecology dosing device although overall structure is complicated, but at every turn average use cost is not higher than or even lower than current disposable ware of dosing. When using, make up the pencil assembly with pushing the subassembly to in arranging the pencil assembly in patient's vagina, handheld settling cover and guide holder forward impel and press the handle and can realize that the rotation type is dosed, hold alone at last and settle the cover and rotate the twist handle and can be with the clean row of the interior gel of cover pipe, convenient operation is swift, and intraductal medicine of cover remains fewly. In addition, because at the in-process of dosing, only need operate the subassembly of injecting, inject the subassembly and can design based on the appearance of being convenient for to grip, grab, compare disposable ware of dosing in the past, this rotation type gynaecology device of dosing is the manually operation of being convenient for more. To sum up, this rotation type gynaecology device of dosing structural design is reasonable, and convenient to use is swift, can rotate the type and dose, has increased medicine and affected part area of contact, has improved medicine efficiency, has wide popularization prospect.

Drawings

Fig. 1 is a schematic structural view of the chinese medicine tube assembly in example 1.

Fig. 2 is an exploded view of the chinese medicine tube assembly in example 1.

Fig. 3 is a schematic structural view of the tube assembly of embodiment 1 after being partially cut away.

Fig. 4 is a cross-sectional view a-a of fig. 3.

Fig. 5 is a schematic structural diagram of a bolus assembly in example 1.

Fig. 6 is a schematic view of a combination structure of the syringe assembly and the bolus assembly according to embodiment 1.

Fig. 7 is a schematic view of rotary administration by pushing a pressing handle forward in embodiment 1.

Fig. 8 is a schematic diagram of the rotation of the twist grip of example 1 to expel the gel from the annular cavity until it is completely expelled.

Fig. 9 is a schematic structural view of the lock mechanism in embodiment 1.

1. The device comprises a first partition plate, a second partition plate, a first plunger, a second plunger, a third plunger, a fourth plunger, a fifth plunger, a sixth plunger, a fourth plunger, a fifth plunger, a sixth plunger, a fourth plunger, a fifth plunger, a sixth plunger.

Detailed Description

Example 1

Referring to fig. 6, the utility model discloses a rotary gynecological drug delivery device, which comprises a drug tube assembly and a push injection assembly;

as shown in fig. 1-4, the cartridge assembly comprises a sleeve 7 and a piston 6 located in the sleeve 7 and in sliding sealing fit with the sleeve, the front end of the sleeve 7 is closed, a plurality of side holes 8 for communicating the inner cavity of the sleeve 7 with the outside are uniformly distributed on the side wall of the middle front section, and a brim-shaped flange 4 is arranged at the rear end; a stud 3 is fixed on the front side of the piston 6, the central axes of the stud 3, the piston 6 and the sleeve 7 are overlapped, an annular cavity 10 is formed between the outer wall of the stud 3 and the inner wall of the sleeve 7, and a non-circular blind hole 5 is formed on the rear side of the piston 6; a first partition board 1 which extends forwards and backwards and of which the inner side end is contacted with the outer wall of the stud 3 is arranged on the inner side wall of the front section in the sleeve 7, and a second partition board 2 which extends forwards and backwards and of which the outer side end is contacted with the inner wall of the sleeve 7 is arranged on the outer wall of the stud 3; gel is filled in the front area of the piston 6 in the inner cavity of the sleeve 7, a plastic film 9 covering the side hole 8 is coated outside the sleeve 7, and the plastic film 9 is used for preventing the gel from leaking; when the front end of the stud 3 abuts against the inner wall of the front end of the sleeve 7, the piston 6 is just contacted with the rear end of the first partition plate 1, at the moment, the first partition plate 1 partitions the annular cavity 10 along the axial direction, and the second partition plate 2 also partitions the annular cavity 10 along the axial direction; in the initial state, namely before use, the rear end part of the first clapboard 1 is abutted with the front end part of the second clapboard 2, so that the stud 3 can only rotate along the direction a under the condition that the sleeve 7 is fixed in position and cannot rotate along the direction b, namely can only rotate in the reverse direction but cannot rotate in the forward direction;

as shown in fig. 5-8, the bolus assembly includes a setting sleeve 18, a guide holder 16 and a push rod 13; the rear part of the mounting sleeve 18 is a cylindrical mounting hole 22 capable of accommodating the flange 4, the front side of the mounting hole 22 is smaller than the diameter of the mounting hole and is used for the sleeve 7 to pass through the leading-out hole 19, the diameter of the leading-out hole 19 is smaller than the outer diameter of the flange 4 of the sleeve 7, a thrust bearing 21 used for abutting against the front side surface of the flange 4 is arranged on the annular front end wall of the mounting hole 22, and the inner diameter of a central hole of the thrust bearing 21 is larger than the outer diameter of the sleeve 7; the mounting sleeve 18 is provided with a locking mechanism 20 with locking and unlocking states, the sleeve 7 and the mounting sleeve 18 cannot rotate relatively in the locking state, the locking mechanism 20 does not block the relative rotation of the sleeve 7 and the mounting sleeve 18 in the unlocking state, and the two working states of the locking mechanism 20 can be manually adjusted; the guide seat 16 is provided with a truncated cone-shaped inserting part 15, when the guide seat 16 is combined with the mounting sleeve 18, the inserting part 15 is inserted into the rear end part of the mounting hole 22, at the moment, the guide seat 16 and the mounting sleeve 18 can rotate relatively, the overall appearance is cylindrical, and the space between the inserting part 15 and the thrust bearing 21 is enough for accommodating the flange 4 at the rear end of the sleeve 7; a threaded hole penetrating the guide seat 16 is formed in the axis of the guide seat; the push rod 13 is provided with a guide thread 17 which penetrates through a threaded hole of the guide seat 16 and is in threaded fit with the threaded hole, the front end of the push rod 13 is provided with a plug 14, the plug 14 is used for being spliced and combined with the blind hole 5 at the rear side of the piston 6, the plug 14 and the blind hole 5 cannot rotate relatively after being combined, the rear end of the push rod 13 is fixedly provided with a torsion handle 12, the push rod 13 can be driven to rotate by rotating the torsion handle 12, and the rear side of the rotation handle is provided with a pressing handle 11 which is rotatably connected with the push rod 13; when the guide seat 16 is kept fixed and the plug 14 of the push rod 13 is combined with the blind hole 5 at the rear side of the piston 6, the pressing handle 11 is pushed forward, and the push rod 13 drives the stud 3 to rotate forward under the guidance of the guide thread 17 during the forward movement process.

The working principle of the rotary gynecological drug delivery device is as follows:

referring to fig. 1, 5 and 6, in use, the cartridge assembly is inserted from the rear side of the mounting sleeve 18 to the front side, so as to ensure that the sleeve 7 extends from the outlet hole 19 to the front of the mounting sleeve 18 and the flange 4 is positioned in the mounting hole 22; inserting a plug 14 at the front end of a push rod 13 into a blind hole 5 at the rear side of a piston 6, adjusting the axial position of a guide seat 16 through rotation, and inserting an inserting part 15 of the guide seat 16 into the rear end part of a placement hole 22 to realize the combination of the guide seat 16 and a placement sleeve 18; as shown in fig. 7, the plastic film 9 coated on the cannula 7 is torn off, the placement sleeve 18 and the guide base 16 are held by hand to maintain the combination state of the two, and the cannula 7 is placed into the vagina of the patient; the pressing handle 11 is pushed forwards, on one hand, the sleeve 7 cannot move forwards due to the limitation of the mounting sleeve 18, the piston 6 and the stud 3 can move forwards in the sleeve 7 under the driving of the push rod 13 to drive the gel to be discharged from the side hole 8, on the other hand, the guide seat 16 and the mounting sleeve 18 are held together and cannot rotate relatively, the forward movement process of the push rod 13 can drive the stud 3 to rotate forwards under the guidance of the guide thread 17 and the screw hole, but the first partition plate 1 and the second partition plate 2 are matched and cannot allow the stud 3 to rotate forwards independently, so the sleeve 7 can also rotate synchronously with the stud 3, and the ejection bearing can reduce the rotation resistance of the sleeve 7; therefore, in the process of pushing the pressing handle 11 forwards, the piston 6 moves forwards in the sleeve 7, all the side holes 8 continuously discharge the gel, and the sleeve 7 rotates at the same time, so that rotary administration is realized, and the discharged gel is more uniformly dispersed and smeared on the vaginal wall; as shown in fig. 8, when the push rod 13 cannot move forward, it is indicated that the front end of the stud 3 has reached the bottom of the front end of the sleeve 7, at this time, only the gel agent is retained in the annular cavity 10 formed between the sleeve 7 and the stud 3, the locking mechanism 20 is adjusted to the locking state to prevent the sleeve 7 and the mounting sleeve 18 from rotating relatively, the mounting sleeve 18 is held alone and the twist handle 12 is rotated, so that the push rod 13 drives the stud 3 to rotate reversely in the sleeve 7, the second partition plate 2 is rotated from one side of the first partition plate 1 to the other side of the first partition plate 1 under the driving of the stud 3, and the gel agent in the annular cavity 10 is discharged until the gel agent is completely discharged; finally, the medicine tube assembly is drawn out of the body of the patient, and the whole operation of rotary medicine feeding is completed; during the process of rotating the knob 12 to rotate the stud 3 in the opposite direction, only the mounting sleeve 18 is held, and the guide holder 16 can rotate with the push rod 13, so that the guide holder 16 does not hinder the rotation of the push rod 13.

In the rotary gynecological drug delivery device, the drug tube assembly is used for packaging gel and releasing the gel into the body of a patient, so that the drug tube assembly is processed by adopting the requirement of one-time use, the push injection assembly is used for providing power required by drug delivery for the drug tube assembly and is not contacted with the patient, so the drug tube assembly can be recycled, and one push injection assembly is matched with a plurality of drug tube assemblies for recycling in clinical application.

As shown in fig. 7 and 8, in clinical application, all the side holes 8 continuously discharge gel during the administration process, and the cannula 7 can rotate to uniformly spread and apply the discharged gel on the vaginal wall, so as to increase the contact area between the gel and the affected part, and facilitate the direct action of the drug on the affected part and the rapid absorption and utilization of the drug; simultaneously, because the gel is discharged through the side opening 8 of a plurality of equipartitions, discharged gel is the flocculus, compares the reunion in the past and does benefit to more and dissolve, and then has improved medicine absorption efficiency.

In this rotation type gynaecology device of dosing, because disposable cartridge assembly need not to set up solitary piston rod and the structure is simpler, need not to set up the part of gripping and can correspondingly shorten length, more current disposable ware of dosing is easier to be makeed, and the cost is also cheaper for this rotation type gynaecology device of dosing is though overall structure is complicated, but at every turn average use cost is not higher than or even is less than current disposable ware of dosing.

Referring to fig. 7 and 8, when the rotary gynecological drug delivery device is used, the drug tube assembly and the push injection component are combined, the drug tube assembly is placed in the vagina of a patient, the placement sleeve 18 and the guide seat 16 are held, the pressing handle 11 is pushed forward to achieve rotary drug delivery, and finally the placement sleeve 18 is held independently and the twisting handle 12 is rotated to completely discharge gel in the sleeve 7, so that the operation is convenient and rapid, and the drug residue in the sleeve 7 is small; in addition, because at the in-process of dosing, only need operate the subassembly of injecting, inject the subassembly and can design based on the appearance of being convenient for to grip, grab, compare disposable ware of dosing in the past, this rotation type gynaecology device of dosing is the manually operation of being convenient for more.

As shown in fig. 4, in the foregoing description, the rotation of the stud 3 is referred to by "forward rotation" and "reverse rotation", and the "forward rotation" and the "reverse rotation" are relative, and are set only in the rotation direction for the convenience of structural explanation; when the cartridge assembly is in an initial state, the rear end part of the first partition plate 1 is attached to the front end part of the second partition plate 2, so that the stud 3 can only rotate along the direction a under the condition that the sleeve 7 is fixed, the rotation towards the direction a is defined as reverse rotation, and the rotation in the direction b opposite to the direction of the reverse rotation is defined as forward rotation; since there are two options for the relative position of the first and second diaphragms 1, 2 when implementing the present rotary gynecological dosing device, the "forward rotation" in the different embodiments does not necessarily have to be in the same actual direction of rotation.

Referring to fig. 6, 7 and 8, the rotational gynecological drug delivery device requires the drug tube assembly and the injection assembly to be maintained in a combined state when in use, on one hand, the mounting sleeve 18 and the guide seat 16 can not be separated by holding the mounting sleeve 18 and the guide seat 16 together, and the drug tube assembly is limited by the mounting sleeve 18 and the guide seat 16 and can not be separated; on the other hand, when the rotary gynecological drug delivery device is implemented, the matching size of the plug 14 at the front end of the push rod 13 and the blind hole 5 at the rear side of the piston 6 can be adjusted, so that the plug 14 and the blind hole 5 can generate proper friction resistance to prevent the plug 14 and the blind hole 5 from being separated after being spliced and combined, and the drug tube assembly and the injection assembly can be maintained in a combined state.

Referring to fig. 7, when the rotary gynecological drug delivery device is used clinically, the sleeve 7 can rotate in the drug delivery process, and the number of relative rotation turns of the push rod 13 and the guide seat 16 is 1-3 turns when the piston 6 moves from the initial position to the stroke end, namely the number of rotation turns of the sleeve 7 is 1-3 turns in the drug delivery process; therefore, on one hand, the gel can be uniformly discharged and spread on the affected part and can be smeared through the rotating sleeve 7, on the other hand, the number of rotating circles of the sleeve 7 is proper, the affected part is not hurt, and the patient does not feel uncomfortable. In the implementation process of the rotary gynecological drug delivery device, the technical requirement that the sleeve 7 rotates for 1-3 circles in the process that the piston 6 moves from the initial position to the stroke end is easily met by adjusting the thread pitch of the guide thread 17 according to the stroke of the piston 6. In addition, since the sleeve 7 rotates 1-3 times during the process of the piston 6 moving from the initial position to the stroke end, the guide thread 17 must have a larger thread pitch, and it is not laborious to push the push rod 13 forward by pushing the pressing handle 11.

Referring to fig. 5, 7 and 8, in the above-mentioned rotary gynecological drug delivery device, the mounting sleeve 18 is provided with a locking mechanism 20, the locking mechanism 20 has two working states of a locking state and an unlocking state, and in the early stage of the drug delivery operation, when the locking mechanism 20 is in the unlocking state, it does not form an obstruction to the relative rotation of the sleeve 7 and the mounting sleeve 18, so as to ensure that the sleeve 7 can rotate to realize rotary drug delivery; when the front end of the stud 3 reaches the bottom of the front end of the sleeve 7, the locking mechanism 20 is manually adjusted to a locking state, at the moment, the sleeve 7 and the mounting sleeve 18 cannot rotate relatively, and the stud 3 can be indirectly driven to rotate reversely in the sleeve 7 by rotating the knob 12, so that the gel in the annular cavity 10 is discharged until the gel is completely discharged; based on the above arrangement of the locking mechanism 20, it has various embodiments in the prior art, such as a locking screw, etc., but in order to make the administration operation more convenient, the locking mechanism 20 preferably adopts the following structure:

as shown in fig. 9, the locking mechanism 20 includes a mounting hole 24 formed on the mounting sleeve 18 and vertically communicated with the outlet hole 19, a positioning pin 23 capable of floating up and down but not separated from the mounting hole 24 is disposed in the mounting hole 24, a return spring 26 for driving the positioning pin 23 to move up to a return state is disposed in the mounting hole 24, a button 25 is disposed at an upper end of the positioning pin 23, and the button 25 protrudes out of an outer surface of the mounting sleeve 18; when the positioning pin 23 is at the initial position, the rotation of the sleeve 7 is not hindered, that is, the locking mechanism 20 is in the unlocked state; when the button 25 is manually pressed, the lower end of the positioning pin 23 abuts against the sleeve 7, so that the sleeve 7 and the mounting sleeve 18 are prevented from rotating relatively, i.e. the locking mechanism 20 is in a locked state.

After the locking mechanism 20 adopts the above design, it has the function of automatically recovering the unlocked state, need not to operate it in the earlier stage of the administration operation, only when the twist grip 12 is rotated, the button 25 is pressed down while holding the placement sleeve 18 by hand, the locking mechanism 20 can be adjusted to the locked state, the operation is convenient and fast, and the operation can be performed by holding the placement sleeve 18 and pressing the button 25 with one hand.

Claims (5)

1. A rotary gynecological drug delivery device comprises a drug tube assembly and a push injection assembly; the cartridge assembly includes the sleeve pipe, is located the intraductal piston of sleeve, its characterized in that: the front end of the sleeve is closed, a plurality of side holes are uniformly distributed on the side wall of the middle front section, and a flange is arranged at the rear end; a stud is fixed on the front side of the piston, an annular cavity is formed between the outer wall of the stud and the inner wall of the sleeve, and a non-circular blind hole is formed in the rear side of the piston; a first partition plate which extends forwards and backwards and of which the inner side end is in contact with the outer wall of the stud is arranged on the inner side wall of the front section in the sleeve, and a second partition plate which extends forwards and backwards and of which the outer side end is in contact with the inner wall of the sleeve is arranged on the outer wall of the stud; gel is filled in the front area of the piston in the inner cavity of the sleeve, and a plastic film for covering the side hole is coated outside the sleeve; when the front end of the stud is abutted against the front end of the sleeve, the piston is just contacted with the rear end of the first partition plate, and the first partition plate and the second partition plate respectively partition the annular cavity along the axial direction; when the cartridge assembly is in an initial state, the rear end part of the first partition plate is attached to the front end part of the second partition plate, so that the stud can only rotate reversely under the condition that the position of the sleeve is fixed; the push injection assembly comprises a mounting sleeve, a guide seat and a push rod; the rear part of the mounting sleeve is a cylindrical mounting hole which can accommodate the flange, the front side of the mounting hole is a guide hole which is smaller than the diameter of the mounting hole and is used for the sleeve to pass through, and a thrust bearing used for abutting against the front side surface of the flange is arranged on the annular front end wall of the mounting hole; the mounting sleeve is provided with a locking mechanism with locking and unlocking states, the sleeve and the mounting sleeve cannot rotate relatively in the locking state, and the relative rotation of the sleeve and the mounting sleeve is not hindered in the unlocking state; the guide seat is provided with a truncated cone-shaped insertion part and a threaded hole which penetrates through the guide seat from front to back; when the guide seat is combined with the mounting sleeve, the insertion part is inserted into the rear end part of the mounting hole, the guide seat and the mounting sleeve can rotate relatively at the moment, the whole appearance is cylindrical, and the space between the insertion part and the thrust bearing is enough for accommodating the flange; the push rod is provided with a guide thread which penetrates through the threaded hole and is in threaded fit with the threaded hole, the front end of the push rod is provided with a plug which can be spliced and combined with the blind hole, the rear end of the push rod is fixed with a twisting handle, and the rear side of the twisting handle is provided with a pressing handle which is rotationally connected with the push rod; when the guide seat is kept fixed and the plug is combined with the blind hole, the pressing handle is pushed forwards, and the push rod drives the stud to rotate forwards.

2. The rotational gynecological delivery device of claim 1, wherein: the drug tube assembly is processed by adopting the requirement of disposable use, and the injection component can be recycled.

3. The rotational gynecological delivery device of claim 1, wherein: after the plug and the blind hole are spliced and combined, the plug and the blind hole can generate proper friction resistance to prevent the plug and the blind hole from being separated, so that the medicine tube assembly and the push injection component can be maintained in a combined state.

4. The rotational gynecological delivery device of claim 1, wherein: and in the process that the piston moves from the initial position to the stroke terminal, the number of relative rotation turns of the push rod and the guide seat is 1-3.

5. The rotational gynecological delivery device of claim 1, wherein: the locking mechanism comprises a mounting hole which is formed in the mounting sleeve and is vertically communicated with the leading-out hole, a positioning pin which can float up and down but cannot be separated from the mounting hole is arranged in the mounting hole, a reset spring which drives the positioning pin to move upwards to a reset state is arranged in the mounting hole, a button is arranged at the upper end of the positioning pin, and the button protrudes out of the outer surface of the mounting sleeve; when the positioning pin is at the initial position, the rotation of the sleeve is not hindered, namely, the locking mechanism is in an unlocking state; when the button is pressed manually, the lower end of the positioning pin is abutted against the sleeve, so that the sleeve and the mounting sleeve can be prevented from rotating relatively, namely, the locking mechanism is in a locking state.

Images