An applicator for topical treatment of the oral mucosa

Abstract

The application relates to a medicine applicator for local treatment of oral mucosa, which comprises a medicine applying head, a piston rod, a piston head, a sealing cover, a first one-way valve, a second one-way valve and a third one-way valve. The medicine applying head is provided with a piston cavity, a medicine storage cavity and a medicine outlet hole. The first one-way valve is connected with the medicine storage cavity and the piston cavity and opens to the piston cavity in one direction, the second one-way valve is connected with the piston cavity and the medicine outlet hole and opens to the medicine outlet hole in one direction, and the medicine outlet hole is arranged on one side of the medicine applying head. One end of the sealing cover is detachably connected with the medicine applying head and seals the medicine storage cavity, and the third one-way valve is arranged on the sealing cover and opens to the medicine storage cavity in one direction. The piston head is arranged in the piston cavity, the sealing cover is provided with a piston rod hole corresponding to the position of the piston cavity, and the piston rod passes through the piston rod hole and is connected with the piston head. The application can facilitate medical staff or patients to apply medicine to oral mucosa lesions, is suitable for accurate positioning of medicine on surfaces with complex shapes in various parts of the oral cavity, avoids finger contact with the medicine, is quick, simple, convenient and sanitary, and improves medicine applying efficiency and medicine feeling.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of applicators in treatment process, in particular to a kind of applicators in oral local treatment process. BACKGROUND

[0002] Ulcer, erosion, papule and plaque are a series of common lesions occurring in oral mucosa, and the treatment process usually needs to be applied to the oral lesions. At present, there is no corresponding application tool. Manual application can cause fingers to be contaminated with ointment or gel medicine and saliva, which is unhygienic, wastes medicine and has poor treatment experience. If cotton swab is used, the medicine is more wasted due to the adhesion of cotton, and the actual amount of medicine distributed on the lesion surface is extremely limited, and the medicine is unevenly distributed and easy to fall off, so that good treatment effect cannot be obtained. SUMMARY

[0003] According to the complex characteristics of the surface morphology of each part in the oral cavity, in order to conveniently and accurately position and uniformly apply medicine to the oral mucosa lesions, the present application provides an applicator for local treatment of oral mucosa, which comprises an applicator head, a piston rod, a piston head, a sealing cover, a first one-way valve, a second one-way valve and a third one-way valve. The applicator head is provided with a piston cavity, a medicine storage cavity and a medicine outlet hole. The first one-way valve is connected to the medicine storage cavity and the piston cavity and is opened to the piston cavity in one direction. The second one-way valve is connected to the piston cavity and the medicine outlet hole and is opened to the medicine outlet hole in one direction, and the medicine outlet hole is arranged on one side of the applicator head. One end of the sealing cover is detachably connected to the applicator head and sealingly connected to the medicine storage cavity. The third one-way valve is arranged on the sealing cover and is opened to the medicine storage cavity in one direction. The piston head is arranged in the piston cavity, the sealing cover is provided with a piston rod hole corresponding to the position of the piston cavity, and the piston rod passes through the piston rod hole and connects the piston head.

[0004] Further, the piston cavity is arranged at the center of the applicator head, and the medicine storage cavity is arranged around the piston cavity.

[0005] Further, the piston cavity is provided with a tapered surface, and the sealing cover is provided with an outer sealing pad and an inner sealing pad. The outer sealing pad cooperates with the medicine storage cavity to seal, and the inner sealing pad cooperates with the tapered surface of the piston cavity to seal.

[0006] Further, one end of the piston head connected to the piston rod forms a first limiting surface. The piston rod hole is smaller than the cross section of the piston head, forming a second limiting surface corresponding to the first limiting surface. The stroke of the piston rod is limited by the limitation of the second limiting surface to the first limiting surface.

[0007] Further, the first one-way valve, the second one-way valve or the third one-way valve each comprises a valve body and a valve core; the valve core is an elastic sealing pad; the valve body is provided with a valve core groove matched with the profile of the valve core, the groove bottom is provided with a connecting part and a flow-through hole, the valve core is placed in the valve core groove and is sealed and fitted on the groove bottom and the flow-through hole through the connecting part, and the valve core is elastically deformed due to fluid action to open the flow-through hole.

[0008] Further, the connecting part is arranged at the center position of the valve core groove and is composed of a connecting column and a hemispherical limiting block arranged at the upper end of the connecting column, the diameter of the connecting column is smaller than the spherical diameter of the hemispherical limiting block, and the height of the connecting column is matched with the thickness of the valve core; the valve core is provided with a mounting hole, and the valve core is connected to the connecting part through the elastic deformation of the mounting hole.

[0009] Further, the medicine applying barrel is further provided with a detachable sealing cover at one end, is provided with a vent hole at the other end, and is provided with a guide hole at the position corresponding to the piston cavity, and the piston rod extends out of the medicine applying barrel through the guide hole.

[0010] Further, the piston head is non-circular in cross section, and the piston cavity is matched with the piston head; the other end of the medicine applying barrel is provided with a first hand holding part outside, and the end of the piston rod extending out of the medicine applying barrel is provided with a second hand holding part; the piston head is moved in the piston cavity through the cooperation operation of the first hand holding part and the second hand holding part.

[0011] Further, the second hand holding part is provided with a direction indication of the medicine outlet position.

[0012] Further, the first hand holding part is a groove around the medicine applying barrel for easy finger clamping, and the second hand holding part is a circular ring for easy finger buckling.

[0013] The medicine is placed in the medicine storage cavity, the medicine in the medicine storage cavity is sucked into the piston cavity through the first one-way valve in the extension and retraction process of the piston rod, the medicine is squeezed out of the medicine outlet through the second one-way valve, and air is sucked into the medicine storage cavity through the third one-way valve, so that medical staff or patients can conveniently perform medicine applying operation on oral mucosa lesions.

[0014] The piston rod is limited by the first and second limiting surfaces, the stroke is fixed, and the inhaled and squeezed medicine is quantitative each time, so that medical staff can easily control the medicine amount.

[0015] The medicine outlet hole is arranged on one side of the medicine applying barrel, so that the medicine is discharged on one side, and the medical staff or the patient himself can operate conveniently during the medicine applying process. The medicine can be concentratedly applied on one lesion part, and the medicine waste caused by the multi-directional extrusion of the medicine is avoided. Meanwhile, the direction indication is arranged, so that the medical staff or the patient himself can clearly know the position of the medicine outlet hole, thereby being suitable for the complex surface of each part in the oral cavity, facilitating the accurate positioning and uniform medicine applying, and improving the medicine applying efficiency and effect. The operation is fast and simple, the finger skin is avoided from contacting the medicine, and the medicine feeling of the patient is improved.

[0016] The second hand-held part is arranged in a circular ring shape, so that the telescopic movement of the piston rod can be conveniently performed by one hand.

[0017] The first hand-held part surrounding the medicine applying barrel facilitates the medical staff or the patient himself to change the hand-holding angle during the medicine applying process, and facilitates the operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a sectional view of an embodiment of the present application;

[0019] Figure 2 Fig. 3 is a schematic view of a valve body of a first one-way valve of the embodiment of the present application;

[0020] Figure 3 Fig. 4 is a schematic view of a valve core of the first one-way valve of the embodiment of the present application;

[0021] Figure 4 Fig. 5 is a schematic view of the first one-way valve of the embodiment of the present application;

[0022] Figure 5 Fig. 6 is a sectional view of another embodiment of the present application;

[0023] Figure 6 Fig. 7 is a schematic view of a third embodiment of the present application;

[0024] Figure 7 Fig. 8 is a sectional view of the third embodiment of the present application;

[0025] Figure 8 Fig. 9 is a schematic view of a fourth embodiment of the present application;

[0026] Figure 9 Fig. 10 is a schematic view of a fifth embodiment of the present application;

[0027] In the diagram: 1-Applying tube, 11-Reinforcing plate, 111-Ventilation hole, 13-Third one-way valve, 14-First handheld part, 15-Guide hole, 2-Applying head, 21-Piston chamber, 211-Conical surface, 22-Drug storage chamber, 23-Drug outlet, 24-First one-way valve, 241-Valve body, 2411-Valve core groove, 2412-Connecting part, 24121-Connecting column, 24122-Limiting block, 2413-Flow hole, 242-Valve core, 2421-Mounting hole, 25-Second one-way valve, 26-Second limiting surface, 31-Piston head, 32-Piston rod, 321-Second handheld part, 3211-Direction indicator, 33-First limiting surface, 5-Sealing cap, 51-Inner sealing gasket, 52-Outer sealing gasket, 53-Piston rod hole. Detailed implementation method:

[0028] Example 1:

[0029] like Figure 1 As shown, the applicator in this embodiment includes an applicator head 2, a piston rod 32, a piston head 31, a sealing cap 5, a first one-way valve 24, a second one-way valve 25, and a third one-way valve 13.

[0030] like Figures 2-4 As shown, the first check valve 24, the second check valve 25, and the third check valve 13 have similar mechanisms, each including a valve body 241 and a valve core 242. The valve body 241 is made of a rigid material (such as PVC), and the valve core 242 is a sealing gasket made of an elastic material (such as rubber). The valve body 241 has a valve core groove 2411 that matches the profile of the valve core 242, and the bottom surface of the groove has a connecting part 2412 and a flow hole 2413. The connecting part 2412 is located at the center of the bottom of the valve core groove 2411, and consists of a connecting post 24121 and a hemispherical limiting block 24122 located at the upper end of the connecting post 24121. The diameter of the connecting post 24121 is smaller than the spherical diameter of the hemispherical limiting block 24122. The valve core 242 has a mounting hole 2421 at its center. The valve core 242 passes through the limit block 24122 through the elastic deformation of the mounting hole 2421 and is connected to the connecting post 24121. The height of the connecting post 24121 is adapted to the thickness of the valve core 242, so that the valve core 242 is stably placed in the valve core groove 2411 and is sealed and fitted to the bottom of the valve core groove 2411 and the flow hole 2413 through the connecting part 2412.

[0031] When the pressure on both sides of the valve core 242 is equivalent, the valve core 242 is closed due to the elastic force; when the pressure on one side of the valve core 242 relative to the limiting block 24122 is larger, the valve core 242 cannot be opened to the flow hole 2413 side due to the block of the valve core groove 2411, and the valve is closed; when the pressure on the flow hole 2413 side of the valve core 242 is larger, the valve core 242 will be tilted to the limiting block 24122 side, and the flow hole 2413 will be opened.

[0032] A piston cavity 21 is arranged at the middle position of the inside of the medicine applying head 2, and is used to accommodate a piston head 31. A medicine storage cavity 22 is arranged around the piston cavity 21, and is used to accommodate the required medicine. A plurality of medicine outlet holes 23 are arranged on the wall of the medicine applying head 2, and are used to extrude the medicine. A first one-way valve 24 is arranged on the cavity wall of the piston cavity 21, and is connected to the medicine storage cavity 22 and the piston cavity 21 and opens to the piston cavity 21 in one direction. A second one-way valve 25 is arranged on the cavity wall of the piston cavity 21 on the other side relative to the first one-way valve 24, and is connected to the piston cavity 21 and the medicine outlet hole 23 and opens to the medicine outlet hole 23 in one direction.

[0033] A threaded end of the sealing cover 5 is detachably connected to the medicine applying head 2 and is in sealing connection with the medicine storage cavity 22. An outer sealing gasket 52 and an inner sealing gasket 51 are arranged on the sealing cover 5. The outer sealing gasket 52 is used to seal with the cavity wall of the medicine storage cavity 22, and the inner sealing gasket 51 is used to seal with the cavity wall of the piston cavity 21 to seal the medicine storage cavity 22. Since the sealing cover 5 needs to be sealed with the medicine applying head 2 at two positions, a tapered surface 211 is arranged on the piston cavity 21, and a tapered hole is arranged in the middle of the inner sealing gasket 51 to cooperate with the tapered surface 211 for sealing. The inner sealing gasket 51 is sealed with the tapered hole through the tapered surface 211, and does not conflict with the sealing of the outer sealing gasket 52 during the tightening of the sealing cover 5. A third one-way valve 13 is arranged on the sealing cover 5 and opens to the medicine storage cavity 22 in one direction.

[0034] The piston head 31 is arranged in the piston cavity 21, and a sealing ring can be further arranged on the outer circumferential side of the piston head 31 to enhance the air tightness of the piston head 31 and the piston cavity 21. The sealing cover 5 is provided with a piston rod hole 53 corresponding to the position of the piston cavity 21. The piston rod 32 passes through the piston rod hole 53 to connect the piston head 31. The piston head 31 can also pass through the piston rod hole 53, which is convenient for disassembly and assembly.

[0035] When using the applicator, first pull out the piston rod 32 and piston head 31, then unscrew the sealing cap 5, and fill the drug storage chamber 22 with medication. After completion, reinstall the above components, at which point the piston chamber 21 and the drug storage chamber 22 form a closed space. By pulling the piston rod 32, the piston head 31 moves backward, reducing the pressure inside the piston chamber 21. At this time, the second one-way valve 25 closes while the first one-way valve 24 opens, and the medication is drawn into the piston chamber 21 from the first one-way valve 24. Then, push the piston rod 32 forward, moving the piston head 31 forward. At this time, the pressure inside the piston chamber 21 increases, the first one-way valve 24 closes while the second one-way valve 25 opens, and the medication is squeezed out from the drug outlet 23. The medication can then be applied to the patient's oral cavity using the applicator. When the amount of drug in the drug storage chamber 22 decreases to a certain level, the third one-way valve 13 draws in outside air, so that the pressure inside the drug storage chamber 22 is always maintained at a level close to that of the outside, preventing the pressure inside the drug storage chamber 22 from being too low, which would be detrimental to drug extraction.

[0036] Example 2:

[0037] like Figure 5 As shown, the difference between this embodiment and embodiment one is that in this embodiment, the piston head 31 is connected to the piston rod 32 at one end to form a first limiting surface 33, and the piston rod hole 53 is smaller than the cross-section of the piston head 31, so that the piston head 31 cannot be pulled out from the piston rod hole 53, forming a second limiting surface 26 corresponding to the first limiting surface 33. The piston head 31's stroke is limited by the limitation of the first limiting surface 33 by the second limiting surface 26.

[0038] If a precise amount of medication needs to be dispensed, the piston head can be used for quantitative extrusion during the 31st stroke, making it easier for medical staff to control the amount of medication dispensed.

[0039] Of course, in this embodiment, the sealing cap 5 needs to be removed before the piston head 31 and piston rod 32 can be pulled out.

[0040] Example 3:

[0041] like Figure 6 As shown, this embodiment, based on the above embodiment, further includes a coating cartridge 1, one end of which is detachably connected to the sealing cap 5 via a thread. The other end of the coating cartridge 1 is provided with a reinforcing plate 11, and the reinforcing plate 11 has a guide hole 15 at the position corresponding to the piston chamber 21, with vent holes 111 surrounding the guide hole. The reinforcing plate 11 ensures the coating cartridge 1 maintains a stable cylindrical structure and guides the piston rod 32 through the guide hole 15, ensuring smooth movement. The vent holes 111 are used by the third one-way valve 13 to draw sufficient air from the coating cartridge. Of course, the diameter of the guide hole 15, corresponding to that in Embodiment 1, should be sufficient to allow the piston head 31 to be extracted.

[0042] In order to facilitate the holding of the applicator, the applicator 1 is further provided with a first hand holding part 14, i.e. two outwardly extending structures symmetrically arranged at the end of the applicator 1, and the piston rod 32 is correspondingly provided with a second hand holding part 321, which is an outwardly extending structure of the piston rod 32. By pushing and pulling the piston rod through the cooperation of the first hand holding part 14 and the second hand holding part 321, a medical staff can complete the medicine applying operation with one hand.

[0043] As shown in Figure 7 , since the first hand holding part 14 and the guide hole 15 are arranged in the embodiment, the sealing cover 5 is inconvenient to disassemble, so the piston head 31 of the embodiment is threadedly connected to the piston rod 32. In order to prevent the piston head 31 from rotating when it is disassembled from the piston rod 32, the cross section of the piston head 31 is selected to be non-circular, such as square. Of course, the cross section of the piston cavity 21 is also square, which is matched with the piston head 31. By unscrewing the piston rod 32, the applicator 1 and the sealing cover 5 can be disassembled.

[0044] Embodiment Four:

[0045] As shown in Figure 8 , on the basis of the embodiment three, the embodiment is provided with a direction indication 3211 at the position of the second hand holding part 321, which is an inwardly recessed arrow, used for indicating the position of the medicine outlet hole 23.

[0046] Embodiment Five:

[0047] As shown in Figure 9 , on the basis of the embodiment three, the first hand holding part 14 of the embodiment is arranged as a groove surrounding the applicator 1 for one turn, and the second hand holding part 321 is a circular ring, the axis of which is perpendicular to the movement direction of the piston rod 32. When operating, the index finger and the middle finger are held in the groove, and the thumb is buckled into the circular ring to push and move the piston rod 32 to discharge the medicine. Since the applicator 1 can be held for one turn, it is convenient for medical staff or patients to adjust the holding posture according to the actual needs, so as to adapt to the complex surfaces of various parts in the oral cavity, and facilitate the medicine applying operation.

Claims

1. A medicated applicator for local treatment of oral mucosa, characterized in that: The device includes a coating head, a coating cylinder, a piston rod, a piston head, a sealing cap, a first one-way valve, a second one-way valve, and a third one-way valve. The coating head is a cylindrical cavity with one open end and a spherical surface at the other, and is equipped with a piston chamber, a drug storage chamber, and a drug outlet. The piston chamber is located at the center of the coating head, and the drug storage chamber surrounds the piston chamber. Multiple drug outlets are located on one side wall of the spherical coating head. The end of the piston head is adapted to the bottom of the piston chamber. The first one-way valve is located on the circumferential side wall of the piston chamber. The first check valve connects the drug storage chamber and the piston chamber, opening unidirectionally into the piston chamber. The second check valve is located on the opposite side wall of the piston chamber, opposite to the first check valve, connecting the piston chamber and the drug outlet, and opening unidirectionally into the drug outlet. The sealing cap has an outer sealing gasket and an inner sealing gasket; the outer sealing gasket seals the drug storage chamber, and the inner sealing gasket seals the conical surface of the piston chamber. One end of the sealing cap is detachably connected to one end of the application head and seals the drug storage chamber. One end of the application cylinder is detachably connected to the sealing cap, and the other end has... A vent hole is provided, and a guide hole is provided at the position corresponding to the piston chamber. The piston rod passes through the guide hole and extends out of the application tube. The third one-way valve is provided on the sealing cover and opens one-way to the storage chamber. The piston head is placed in the piston chamber, and the sealing cover is provided with a piston rod hole at the position corresponding to the piston chamber. The piston rod passes through the piston rod hole and connects to the piston head. The first one-way valve, the second one-way valve, and the third one-way valve all include a valve body and a valve core. The valve body is provided with a valve core groove that matches the profile of the valve core. A flow hole is provided on the bottom surface of the groove. A connecting post that matches the thickness of the valve core and a hemispherical limiting block with a diameter larger than the connecting post are provided at the center of the bottom surface of the groove. The valve core is an elastic sealing gasket. An installation hole is provided at the center of the valve core. The valve core is placed in the valve core groove. The valve core passes through the limiting block and is connected and positioned at the connecting post through the elastic deformation of the installation hole. It is sealed and fitted to the bottom surface of the groove and the flow hole of the valve body. When the valve core is subjected to fluid pressure, it produces an elastic deformation that tilts to one side of the limiting block, causing the flow hole to open.

2. The applicator for local treatment of oral mucosa according to claim 1, characterized in that: The piston head connects to one end of the piston rod to form a first limiting surface; the piston rod hole is smaller than the cross-section of the piston head to form a second limiting surface corresponding to the first limiting surface; the piston rod stroke is limited by the limitation of the first limiting surface by the second limiting surface.

3. The applicator for local treatment of oral mucosa according to claim 1 or 2, characterized in that: The piston head has a non-circular cross-section, and the piston cavity is adapted to the piston head; a first hand-held part is provided on the outer side of the other end of the coating tube, and a second hand-held part is provided on the end of the piston rod extending out of the coating tube; by cooperating with the first hand-held part and the second hand-held part, the piston head can be moved in the piston cavity.

4. The applicator for local treatment of oral mucosa according to claim 3, characterized in that: The second hand-held part is provided with a direction indicator for the position of the medicine outlet.

5. The applicator for local treatment of oral mucosa according to claim 4, characterized in that: The first hand grip is a groove that surrounds the medicine applicator for easy finger gripping; the second hand grip is a ring that allows fingers to easily snap into it.

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