Dental floss pick

Abstract

The dental floss pick comprises a handheld part and a dental floss frame part, the handheld part is connected with the dental floss frame part and is used for being held during use, gargle is stored in the handheld part, and when the dental floss pick is used for being communicated with the external environment, the dental floss can be taken out of the dental floss frame part under the action of external air and the gravity of the gargle. The mouthwash is released into the oral cavity through the dental floss frame part, and the dental floss frame part is used for cleaning the oral cavity. According to the dental floss pick, the gargle is stored in the handheld part and can be released into the oral cavity, the physical cleaning function of scraping the dental floss and the chemical cleaning function of inhibiting bacteria of the gargle are combined, the single-function structure of a traditional dental floss pick is broken through, the oral care effect and efficiency are improved, and the dental floss pick is suitable for occasions such as going out and traveling; and the trouble of carrying the floss pick and the mouthwash bottle at the same time is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oral hygiene tools, and in particular to a dental floss pick. Background Technology

[0002] With the increasing awareness of oral health among the public, dental floss picks, as an effective tool for physically removing plaque from interproximal surfaces, have gradually become an essential part of daily oral care. Using dental floss after meals is also a recommended method for maintaining oral health by dentists. According to the "Fourth National Oral Health Epidemiological Survey Report," the prevalence of dental caries in permanent teeth among adults aged 35-44 in my country is as high as 89%. Furthermore, studies have shown that traditional brushing methods are often insufficient in cleaning interproximal surfaces. Using dental floss can effectively remove food debris remaining between teeth. Most commercially available dental floss picks are made of high-molecular polymers (such as nylon and polyester fibers), with a diameter range of 0.15-0.25mm, which allows for effective removal of impacted food debris within a safe periodontal probing range (≤0.35mm), inhibiting the growth of various bacteria in the mouth and reducing the risk of gum damage by approximately 67% compared to toothpicks. However, mechanical cleaning alone has certain technical limitations: physical friction can only remove plaque biofilm, lacks chemical antibacterial components, and cannot block the metabolic activities of cariogenic / periodontal pathogens such as Streptococcus mutans and Porphyromonas gingivalis. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a dental floss pick that combines the physical cleaning function of flossing with the chemical cleaning function of mouthwash, breaking through the traditional single-function structure of dental floss picks, improving the effect and efficiency of oral care, and is suitable for outings and travel, avoiding the inconvenience of carrying dental floss picks and mouthwash bottles at the same time.

[0004] This utility model provides a dental floss pick, including a handle and a floss holder. The handle is connected to the floss holder and is used for holding during use. The handle stores mouthwash and is used to release the mouthwash into the oral cavity through the floss holder when in contact with the external environment, under the action of external air and gravity of the mouthwash. The floss holder is used for cleaning the oral cavity.

[0005] In one embodiment, the handheld part includes a main body, a tail end, and a ruptureable film. The main body has a receiving cavity inside, in which the mouthwash is stored. The air pressure inside the receiving cavity is lower than the air pressure outside. The main body has two open ends. The tail end is detachably mounted on one end of the main body, and the ruptureable film is mounted on the other end of the main body. The end of the main body where the ruptureable film is located is connected to the dental floss holder.

[0006] In one embodiment, the main body includes a connecting end and a receiving end. The connecting ends are respectively disposed at both ends of the receiving end, and the ruptureable film and the tail end are respectively connected to the corresponding connecting ends. The size of the receiving end gradually decreases from the middle to both ends, and the size of the receiving end is adapted to the size of the connecting end.

[0007] In one embodiment, the ruptureable membrane includes a membrane body and a weak point, the weak point being disposed on the membrane body, and the membrane body being assembled to the end of the main body.

[0008] In one embodiment, the dental floss holder includes a frame and dental floss, the dental floss is connected to the frame, the frame is connected to the handheld part, the frame has a liquid channel inside and the liquid channel communicates with the handheld part, and the surface of the frame has a liquid outlet communicating with the liquid channel.

[0009] The dental floss picks provided by this utility model combine the physical cleaning function of flossing with the chemical cleaning function of mouthwash by storing mouthwash in the handle and releasing it into the mouth. This breaks through the traditional single-function structure of dental floss picks, improves the effect and efficiency of oral care, and is suitable for outings and travel, avoiding the inconvenience of carrying dental floss picks and mouthwash bottles at the same time. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 The front view of the dental floss stick provided by this utility model.

[0012] Figure 2 This is a side view of the dental floss stick provided by this utility model.

[0013] Figure 3 A schematic diagram of the handheld part of the dental floss pick provided by this utility model.

[0014] Figure 4 This is a schematic diagram of the dental floss holder for the dental floss sticks provided by this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0017] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0019] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0020] Please see Figure 1 The dental floss picks provided by this utility model include a handle 2 and a floss holder 1. The handle 2 is connected to the floss holder 1 and is used for holding during use. The handle 2 stores mouthwash inside and is used to release mouthwash into the oral cavity through the floss holder 1 when in contact with the external environment, under the action of external air and gravity of the mouthwash. The floss holder 1 is used for cleaning the oral cavity.

[0021] Understandably, when cleaning the mouth, one holds the handle 2 and places the floss holder 1 inside the mouth to clean the inside of the mouth. Cleaning refers to removing food debris and other debris between the teeth. The interdental spaces can be understood as the spaces between teeth. After cleaning, if rinsing is needed, the end of the handle 2 away from the floss holder 1 can be raised upwards, while the end of the handle 2 near the floss holder 1 is lowered downwards. This ensures that the height of the end of the handle 2 near the floss holder 1 is lower than the end away from the floss holder 1, allowing the air pressure inside the handle 2 to be lower than the external environment. In this state, when the handheld part 2 is connected to the external environment, the external environment and the gravity of the mouthwash cause the mouthwash to be released into the dental floss holder 1 and then into the oral cavity. The main ingredients of the mouthwash are a mixture of alcohol-free eucalyptol, thymol, methyl salicylate, cocamidopropyl betaine, menthol, sodium bicarbonate, sodium benzoate, etc. Various natural fragrance extracts and sugar-free sweeteners can be added according to actual usage needs. It plays a role in sterilization and bacteriostasis and fresh breath under the premise of being gentle and non-irritating. The mouthwash contains about 15ml, which meets the doctor's recommended amount for a single use.

[0022] Please see Figure 2 In some embodiments, the handheld part 2 includes a main body 202, a tail end 201, and a ruptureable film 204. The main body 202 has a receiving cavity 203 inside, where mouthwash is stored. The air pressure inside the receiving cavity 203 is lower than the air pressure outside. The main body 202 is open at both ends. The tail end 201 is detachably mounted on one end of the main body 202, and the ruptureable film 204 is mounted on the other end of the main body 202. The end of the main body 202 where the ruptureable film 204 is located is connected to the dental floss holder part 1.

[0023] Understandably, the breakable design of the tail end 201 involves a brown line marking at the junction of the tail end and the main body 202. This serves to indicate that the break can be made along this marking. A ring-shaped micro-crack is designed at the junction, which can be obtained using ultraviolet laser (wavelength 355nm) engraving with a depth accuracy controlled within ±0.02mm. The required breaking force at this location is ≤0.5N·m. After breaking at this location, the receiving cavity 203 of the handle 2 is connected to the external atmospheric pressure. The method of fixing the ruptureable film 204 to the main body 202 can be... Food-grade adhesive is used to bond the floss holder to the end of the main body 202. Under normal circumstances, the floss holder 204 will not be damaged by the pressure difference between the outside air and the inside of the main body 202. Only when the gravity of the mouthwash is added and the tail end 201 is broken can the floss holder 204 be properly damaged. Therefore, under normal circumstances, the external air pressure on the side of the floss holder 1 will not damage the floss holder 204. The handle 2 can be made of food-grade plastic materials such as polypropylene (PP) or high molecular weight polyethylene (PE). The handle 2 with this structure is easy to use.

[0024] The rupture conditions of the aforementioned ruptureable film 204 can be expressed as follows:

[0025] The ruptureable membrane 204 can be pre-tightened:

[0026] The pre-stretched fracturing thin film 204 is covered and fixed to the end of the main body 202 to form an inwardly concave curved surface (similar to a tympanic membrane).

[0027] Preload equivalent pressure difference: The equivalent preload difference ΔP is generated through pre-tensioning. 预 =8kPa;

[0028] Pressure difference calculation:

[0029] Inertial pressurization of airflow: When air flows in at high speed, kinetic energy is converted into pressure energy, generating a transient pressure difference peak.

[0030] ΔP=1 / 2ρv 2 =1 / 2×1×(25) 2 ≈313Pa (revised: 313Pa) = 0.313kPa;

[0031] (Flow velocity v = 25 m / s, estimated using Bernoulli's equation, ρ is the density of the mouthwash, approximately equal to the density of water).

[0032] The initial conditions within the cavity 203 (pressure P1, velocity v1≈0, height h1).

[0033] The opening at the end of the main body 202 (pressure P2 = atmospheric pressure, velocity v2, height h2 = h1).

[0034] ΔP = P1 - P2;

[0035] Bernoulli's equation:

[0036] P1+1 / 2ρv1 2 =P2+1 / 2ρv2 2 ;

[0037] Substituting v1≈0, P2=atmospheric pressure:

[0038] ΔP = P1 - P2 = 1 / 2ρv2 2 ;

[0039] Introduce a flow coefficient Cd (which can be an empirical value, typically 0.6-0.8):

[0040] ;

[0041] ΔP =ρv2 2 / 2Cd 2 ;

[0042] The initial pressure difference is a negative pressure of 5 kPa;

[0043] Flow rate calculation:

[0044] , where v2(t) is equivalent to v2 above, and ΔP(t) is equivalent to ΔP above;

[0045] Conservation of mass (volume of air flowing in):

[0046] Vair(t) = ∫0t v2(t)A2dt′

[0047] Combining the ideal gas law Pinternal(t) = P0V0 / [V0 + Vair(t)], a system of differential equations is formed.

[0048] Peak flow velocity assumption: Initially, ΔP ≈ ΔP0, substituting Cd = 0.7:

[0049]

[0050] ΔP inertia ≈ 1 / 2ρv 2peak 2 =1 / 2×1×64 2 ≈2.05 kPa (Revised: 2.05 kPa);

[0051] Maximum total pressure difference: Pre-tightening pressure 8 kPa + hydrostatic pressure 0.49 kPa + inertial pressure boosting 2.05 kPa ≈ 10.54 kPa;

[0052] Hydrostatic pressure (ΔP2):

[0053] Liquid column height: calculated based on a vertical height h = 50 mm from the mouthwash surface to the ruptureable film;

[0054] Liquid density: Approximate water density ρ = 1000 kg / m³;

[0055] Static pressure formula:

[0056] ΔP2=ρgh=1000×9.8×0.05=490Pa≈0.49kPa;

[0057] Total pressure difference: ΔPtotal = 0.375 + 0.49 + 8 ≈ 8.87 kPa;

[0058] 204 Matching for Rupture-Proof Film:

[0059] 20μm aluminum foil composite film or PET film is selected, and the rupture pressure difference is reduced to 8kPa by pre-cutting and diameter control to ensure reliable triggering.

[0060] Rupture pressure formula:

[0061] P_rupture = σ·4T / D (D = diameter of the ruptureable film);

[0062] T=20μm=0.02mmT=20μm=0.02mm;

[0063] σ = PET tensile strength ≈ 150 MPa;

[0064] D = 4T·σ / P fracture = 4 × 0.02 × 150 / 8 ≈ 18.8 mm;

[0065] Conclusion: The diameter of the ruptureable film should be ≤18.8mm (5mm in this embodiment meets the above condition), and the actual rupture pressure can be further reduced by pre-cutting.

[0066] Technical parameters for 204 pre-cut fracture-resistant film:

[0067] Cross-shaped or star-shaped radial laser pre-cut marks;

[0068] Cut length: 4 mm along the diameter of the ruptureable film 204;

[0069] Cut depth: 18μm (total thickness 20μm, accounting for 90%);

[0070] Cut width: ≤10μm (UV laser processing);

[0071] Safety verification of ruptureable membranes

[0072] I. Initial State Pressure Analysis:

[0073] When unbroken, the pressure on both sides of the ruptureable membrane 204 is:

[0074] Outer side (in contact with the atmosphere): Standard atmospheric pressure P0 = 101.325 kPa;

[0075] Inside: Hydrostatic pressure of the liquid: ΔP_static = ρgh;

[0076] Internal sealing pressure: Assume the internal pressure is negative -5 kPa after production and filling;

[0077] Total pressure difference:

[0078] ΔP_total = |P_internal + ΔP_static - P_0 | = ΔP_static ≈ 4.51 kPa;

[0079] Net pressure differential that the ruptureable membrane 204 can withstand:

[0080] ΔP = ΔPpre - (P0 - Pinternal - ΔPstatic) = 8 - 4.51 = 3.49 kPa (internal → external)

[0081] In its initial state, the ruptureable membrane 204 can withstand an internal-to-external pressure difference of 3.49 kPa, which is far below the rupture threshold (8 kPa), ensuring it remains safe and does not rupture.

[0082] II. Verification of the compressive strength of the 204 ruptureable film:

[0083] 1. Parameters of the fracture-resistant film 204

[0084] Diameter: 5mm;

[0085] Thickness: 20μm (PET / aluminum foil composite film);

[0086] Pre-cut marks: cross or star-shaped radial laser markings (depth 18μm);

[0087] Rupture pressure: 8 kPa;

[0088] 2. Safety Factor Calculation

[0089] Safety factor = Rupture pressure of the fractured membrane / Actual pressure difference = 8 kPa / 0.49 kPa ≈ 16.3

[0090] Conclusion: The pressure difference that the fractured membrane 204 withstands in the initial state is far below its fracture threshold, and it will not spontaneously fracture.

[0091] III. Verification under Extreme Cases

[0092] 1. Risk of creating negative pressure

[0093] If additional negative pressure is generated during sealing after filling (e.g., due to cooling contraction causing ΔP_manufacturing = −5 kPa):

[0094] ΔPtotal = |ΔPstatic + ΔPmanufacturing| = |0.49 - 5| = 4.51 kPa;

[0095] It is still below the rupture pressure of 8 kPa, so the ruptured membrane 204 is safe.

[0096] 2. Effects of temperature changes:

[0097] High-temperature expansion: Assuming the temperature increases by 30°C, the internal pressure increases.

[0098] ΔP_heat = nRT / V (Simplified calculation based on ideal gas law)

[0099] If the cavity volume is 15.2 mL, the air volume percentage is 10% (1.52 mL), and the temperature rises from 20℃ to 40℃:

[0100] ΔP_heat ≈ 101 kPa × (40 - 20) / 293 ≈ 6.9 kPa

[0101] Total pressure difference: 0.49 + 6.9 ≈ 7.39 kPa, still below the rupture pressure.

[0102] Please continue reading. Figure 2 In some embodiments, the main body 202 includes a connecting end and a receiving end. The connecting ends are respectively disposed at both ends of the receiving end, and the ruptureable film 204 and the tail end 201 are respectively connected to the corresponding connecting ends. The size of the receiving end gradually decreases from the middle to both ends, and the size of the receiving end is adapted to the size of the connecting end.

[0103] It is known that the main body 202 can be shuttle-shaped, with the connecting end and the receiving end being an integral structure. The maximum diameter of the receiving end is 15mm, and it gradually narrows to 5mm at both ends. The overall length of the main body 202 can be 75mm, and the internal receiving cavity has a capacity of approximately 15.2ml. The ruptureable film 204 can be made of a food-grade material with good sealing properties, such as polyethylene (PE), polypropylene (PP), polylactic acid (PLA), or aluminum foil and biodegradable plastics. The diameter of the ruptureable film 204 is approximately 5mm, and the thickness is approximately 20μm. This structure of the main body 202 is easy to hold and has a good storage effect.

[0104] Please see Figure 3 In some embodiments, the ruptureable film 204 includes a film body 204a and a weak point 204b, the weak point 204b being disposed on the film body 204a, and the film body 204a being assembled at the end of the main body 202.

[0105] It is known that the weak point 204b can be in the form of a microcrack pre-reserved on the film body 204a. The weak point 204b can be in the shape of an X, etc., so that the ruptureable film 204 can be squeezed and broken under the action of external force.

[0106] Please see Figure 1 and 4 In some embodiments, the dental floss holder 1 includes a frame 101 and dental floss 102. The dental floss 102 is connected to the frame 101. The frame 101 is connected to the handheld part 2. A liquid channel is provided inside the frame 101 and the liquid channel is connected to the handheld part 2. An outlet 103 connected to the liquid channel is provided on the surface of the frame 101.

[0107] It is known that the frame 101 can be bow-shaped, and the dental floss 102 is connected to the opening of the frame 101. The dental floss 102 can be made of food-grade materials such as nylon, polytetrafluoroethylene (PTFE), and polyester fiber, with a diameter of approximately 0.20-0.30 mm. The connection between the dental floss 102 and the frame 101 can be an integral structure. The outlet 103 can be located on the frame 101 near the dental floss 102. The dental floss 102 is placed between the adjacent surfaces of the teeth and removes food debris between the teeth through physical friction. The dental floss frame 1 of this structure is simple and easy to use.

[0108] As described above, the dental floss picks provided by this utility model combine the physical cleaning function of flossing with the chemical cleaning function of mouthwash by storing mouthwash in the handle 2 and releasing it into the mouth. This breaks through the traditional single-function structure of dental floss picks, improves the effect and efficiency of oral care, and is suitable for outings and travel, avoiding the inconvenience of carrying both dental floss picks and mouthwash bottles.

[0109] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A dental floss pick, characterized in that, It includes a handheld part and a dental floss holder. The handheld part is connected to the dental floss holder and is used for holding during use. The handheld part stores mouthwash and is used to release the mouthwash into the oral cavity through the dental floss holder when in contact with the external environment, under the action of external air and gravity of the mouthwash. The dental floss holder is used for cleaning the oral cavity.

2. The dental floss pick as described in claim 1, characterized in that, The handheld part includes a main body, a tail end, and a ruptureable film. The main body has an internal cavity for storing mouthwash. The air pressure inside the cavity is lower than the air pressure outside. The main body is open at both ends. The tail end is detachably mounted on one end of the main body. The ruptureable film is mounted on the other end of the main body. The end of the main body containing the ruptureable film is connected to the dental floss holder.

3. The dental floss pick as described in claim 2, characterized in that, The main body includes a connecting end and a receiving end. The connecting ends are respectively disposed at both ends of the receiving end, and the ruptureable film and the tail end are respectively connected to the corresponding connecting ends. The size of the receiving end gradually decreases from the middle to both ends, and the size of the receiving end is adapted to the size of the connecting end.

4. The dental floss pick as described in claim 2, characterized in that, The ruptureable membrane includes a membrane body and a weak point, the weak point being disposed on the membrane body, and the membrane body being assembled at the end of the main body.

5. The dental floss pick as described in claim 1, characterized in that, The dental floss holder includes a frame and dental floss. The dental floss is connected to the frame, and the frame is connected to the handheld part. A liquid channel is provided inside the frame and the liquid channel communicates with the handheld part. An outlet communicating with the liquid channel is provided on the surface of the frame.

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