Sanitary towel capable of prompting replacement

Abstract

The invention relates to a sanitary napkin capable of prompting replacement. The sanitary napkin comprises a surface layer, an absorption core layer, a bottom layer, a hygienic product replacement prompting system arranged between the absorption core layer and the bottom layer, and an insulation waterproof layer wrapping and sealing the hygienic product replacement prompting system. The hygienic product replacement prompting system comprises a friction power generation device, a microcontroller, a timer and a signal transceiver which are sequentially connected in series and form a loop. The friction power generation device comprises a positive friction layer, a negative friction layer and an electric insulation layer arranged between the positive friction layer and the negative friction layer; the positive friction layer and the negative friction layer can penetrate through the electric insulation layer to be in contact friction with each other to generate current; the timer is used for timing, and when the timing duration of the timer reaches the preset duration, the microcontroller controls the signal transceiver to send a prompt signal to an external terminal. The sanitary towel capable of prompting replacement is ingenious in design, simple in structure, convenient to use and high in practicability.

Description

Technical Field

[0001] The invention relates to the field of sanitary napkins, in particular to a sanitary napkin capable of prompting replacement. Background Art

[0002] Sanitary napkins are sanitary products used by women during menstruation. The main materials are cotton, non-woven fabrics, pulp or polymers and polymer composite paper formed by composites of the above materials. When improving existing sanitary products, they focus on the comfort of the products and the enhancement of liquid adsorption performance, but ignore the fact that there are many things to pay attention to and remind during women's menstrual hygiene. For example, sanitary napkins need to be replaced regularly: if sanitary napkins are not replaced for a long time, menstrual blood will mix with sanitary napkins, which will easily breed a large number of bacteria, which may cause women to experience uncomfortable symptoms such as itchy skin and redness, produce odor, and even worse, cause gynecological inflammations such as vulvitis and vaginitis, and increase the risk of urinary tract infection; therefore, in order to maintain personal hygiene and health, it is recommended to change sanitary napkins every 2-4 hours. However, in busy work or study, women may forget that they need to change sanitary napkins. Summary of the invention

[0003] Based on this, the purpose of the present invention is to provide a sanitary napkin that can remind you to change it to solve the hygiene problem caused by women easily forgetting to change their sanitary napkins in time during menstruation. The present invention is cleverly designed, simple in structure, easy to use and highly practical.

[0004] A sanitary napkin capable of prompting replacement, comprising a surface layer, an absorbent core layer, a bottom layer, a sanitary product replacement prompting system arranged between the absorbent core layer and the bottom layer, and an insulating waterproof layer that wraps and seals the sanitary product replacement prompting system; the sanitary product replacement prompting system comprises a friction power generation device, a microcontroller, a timer and a signal transceiver that are sequentially connected in series to form a loop; the friction power generation device comprises a positive friction layer, a negative friction layer and an electrical insulation layer arranged between the positive friction layer and the negative friction layer; the electrical insulation layer is a hollow structure, and the positive friction layer and the negative friction layer can pass through the electrical insulation layer to contact each other and generate current through friction; the timer is used for timing, and when the timing duration of the timer reaches a preset duration, the microcontroller controls the signal transceiver to send a prompt signal to an external terminal.

[0005] After testing, the inventor found that the sanitary napkin capable of prompting replacement of the present invention can make the positive friction layer and the negative friction layer of the sanitary product replacement prompt system bend and deform under the action of external force and pass through the hollow electrical insulation layer to continuously contact and rub each other-separate to generate current: when the positive friction layer and the negative friction layer are in contact for the first time, due to the difference in their ability to gain and lose electrons, the two carry positive and negative charges respectively; when the positive friction layer and the negative friction layer are separated for the first time, a potential difference is generated between the two, and the flow of electrons generates current, and gradually reaches a state of equilibrium as the separation distance increases. When the distance between the two gradually decreases, when the positive friction layer and the negative friction layer contact again, an opposite potential difference is generated, causing the electrons to flow in the opposite direction until a new equilibrium is reached; the reciprocating contact and separation of the positive friction layer and the negative friction layer will generate continuous electron transfer, thereby continuously generating current. The timing data of the timer is transmitted to the microcontroller, and the replacement time is set on the microcontroller. When the timing data of the timer reaches the preset time, the microcontroller controls the signal transceiver to send a reminder signal to the outside world to realize the function of reminding to replace the sanitary napkin, which can automatically remind the user to regularly replace sanitary products to avoid sanitary problems caused by long-term use. On the one hand, the insulating waterproof layer prevents the current generated by the sanitary product replacement reminder system from flowing into the human body and causing harm to the human body; on the other hand, it can prevent menstrual blood from flowing into the sanitary product replacement reminder system to cause a short circuit and damage the electrical components of the sanitary product replacement reminder system.

[0006] Furthermore, metal electrodes are attached to the outer surface of the positive friction layer and / or the negative friction layer. The metal electrodes are conducive to absorbing the positive and negative charges generated during the friction between the positive friction layer and the negative friction layer, and are conducive to the positive and negative charges flowing in the closed circuit of the sanitary product replacement reminder system to form current.

[0007] Furthermore, the sanitary product replacement reminder system also includes a capacitor connected in parallel to the friction power generation device. When the user moves, the positive friction layer and the negative friction layer generate electricity by friction with each other, and the capacitor is in a charging state; when the user's movement is completely still, the positive friction layer and the negative friction layer are relatively still, and the capacitor is in a discharging state and acts as a power source, so that components such as the microcontroller, timer and signal transceiver can operate normally.

[0008] Furthermore, a plurality of raised contact parts are evenly distributed on the inner surface of the positive friction layer or the negative friction layer, and the contact parts facilitate contact and friction between the positive friction layer and the negative friction layer.

[0009] Furthermore, the material of the positive friction layer is conductive fiber; the negative friction layer is a composite film formed by injecting conductive material; the conductive material is 1-butyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt. When the positive friction layer and the negative friction layer first contact, the positive friction layer is positively charged and the negative friction layer is negatively charged due to the difference in their ability to gain and lose electrons; when the positive friction layer and the negative friction layer are separated for the first time, a negative potential difference is generated between the positive friction layer and the negative friction layer, at which time the electrons of the negative friction layer flow to the upper positive friction layer, generating a positive current signal, and gradually reaching a state of equilibrium as the separation distance increases. When the positive friction layer and the negative friction layer contact again, the distance between the positive friction layer and the negative friction layer gradually decreases, and the generated positive potential difference causes electrons to flow from the positive friction layer to the negative friction layer, forming a negative current signal until a new equilibrium is reached. With the continuous use of the sanitary napkin, the reciprocating contact and separation of the positive friction layer and the negative friction layer will generate continuous electron transfer, thereby continuously generating current. The composite film easily generates electricity to provide a stable amount of electricity to the load, while improving the dielectric properties and effectively maintaining the flexibility of the entire generator.

[0010] Furthermore, the material of the electrical insulation layer is polyethylene terephthalate.

[0011] Furthermore, the conductive circuit of the sanitary product replacement reminder system is a conductive fabric, and the conductive fabric is used for the electrical connection of the friction power generation device, the microcontroller, the timer and the signal transceiver.

[0012] Furthermore, the conductive fabric is prepared by weaving carbon nanotube fibers with one or more of cotton, linen, wool or chemical fibers into carbon nanotube yarns. The conductive fabric containing nanofiber tubes not only has good conductivity, but also can reduce the foreign body sensation during use and improve comfort.

[0013] Furthermore, the sanitary product replacement reminder system includes a plurality of the friction power generation devices connected in parallel, and the friction power generation devices are respectively arranged at one or more positions of the front, rear, left, and right of the sanitary napkin. The plurality of power generation devices arranged in parallel are arranged at one or more positions of the front, rear, left, and right of the sanitary napkin close to the abdomen and / or thighs and / or buttocks of the human body, which is conducive to any subtle movements of multiple parts of the user in situations such as breathing, hip movement, and human body walking, so that the plurality of friction power generation devices that can prompt the replacement of the sanitary napkin can generate current simultaneously or separately, ensuring the continuous power generation of the system and the continuous timing function of the timer.

[0014] Furthermore, the sanitary product replacement reminder system also includes a sensor component connected in series with the microcontroller, and the sensor component is one or more of a temperature sensor, a liquid flow sensor, a humidity sensor, a bacteria detection sensor, and an odor detection sensor. The temperature sensor can detect the ambient temperature, the user's body temperature data, and the sanitary napkin temperature data; the liquid flow sensor can monitor the menstrual blood volume; the humidity sensor can detect the menstrual blood adsorption of the sanitary napkin; the bacteria detection sensor can detect the bacteria index in the hygiene; and the odor detection sensor is used to detect whether there is an odor. The sensor component transmits the detection result to the microcontroller and sends it to the external terminal device through the signal transceiver to determine its physiological health status.

[0015] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the sanitary napkin capable of prompting replacement;

[0017] Figure 2 A schematic cross-sectional view of the sanitary napkin capable of prompting replacement;

[0018] Figure 3 A circuit connection diagram of the sanitary product replacement reminder system;

[0019] Figure 4 It is a circuit connection diagram of the sanitary product replacement reminder system provided with a capacitor 6;

[0020] Figure 5 It is a structural schematic diagram of the sanitary product replacement reminder system provided with a plurality of friction power generation devices connected in parallel with each other;

[0021] Figure 6 A schematic diagram of a testing method according to an embodiment of the present invention;

[0022] Figure 7 for Figure 5 The voltage and current change diagrams generated when the finger is bent 45° and straightened in the test method;

[0023] Figure 8 for Figure 5 The voltage and current change diagrams generated when the finger is bent 90° and straightened in the test method. DETAILED DESCRIPTION

[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. It should be clear in the present application that the embodiments described are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0025] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0026] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0029] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0030] like Figure 1-2The sanitary napkin shown in the figure can remind the user to change the sanitary napkin, which at least comprises a surface layer 10, an absorbent core layer 20, a bottom layer 40, a sanitary product change reminder system 30 arranged between the absorbent core layer 20 and the bottom layer 40, and an insulating waterproof layer 50 which wraps and seals the sanitary product change reminder system. Figure 2 The sanitary product replacement reminder system 30 shown in the figure comprises at least a friction power generation device 31, a microcontroller 32, a timer 33, a signal transceiver 34 connected to an external device, and a conductive fabric 35 for connecting the above-mentioned electrical components, which are connected in series in sequence. The friction power generation device 31 provides power support for the operation of the entire sanitary product replacement reminder system; the timer 33 has an automatic timing function. When the timing time of the timer 33 reaches the preset time, the microcontroller 32 controls the signal transceiver 34 to send a reminder signal to the external terminal; the microcontroller 32 can also control the start of the timer 33; the signal transceiver 34 connects the microcontroller 32 with an external terminal device such as a smart device, and the microcontroller 32 transmits the obtained data and information to the external terminal device through the signal transceiver 34 in real time to realize data transmission; at the same time, the signal transceiver 34 can also receive the command signal of the external terminal device and transmit it to the microcontroller 32 for conversion and processing, thereby starting the timer 33; the external terminal device is preferably a smart device such as a mobile phone or a computer, and can be connected to the microcontroller 32 through wireless communication methods such as WIFI and Bluetooth. The conductive fabrics 35 of the sanitary product replacement reminder system are all prepared by weaving carbon nanotube fibers with one or more of cotton, linen, wool or chemical fibers into carbon nanotube yarns. On the one hand, the insulating waterproof layer 50 prevents the current generated by the sanitary product replacement reminder system from flowing into the human body and causing harm to the human body; on the other hand, it can prevent menstrual blood from flowing into the sanitary product replacement reminder system and causing a short circuit, thereby damaging the electrical components of the sanitary product replacement reminder system.

[0031] See also Figure 3The friction power generation device 31 adopts a vertical contact-separation working mode, including a positive friction layer 312, an electrical insulation layer 314 and a negative friction layer 316 arranged in sequence from top to bottom; the electrical insulation layer 314 is a hollow structure; the positive friction layer 312 and the negative friction layer 316 can pass through the electrical insulation layer 314 to contact and rub with each other to generate current; in this embodiment, the positive friction layer 312 and the negative friction layer 316 are both rectangular sheet structures with the same shape and size, and the electrical insulation layer 314 is a square ring-shaped hollow structure with a shape and size matching the positive friction layer 312 and the negative friction layer 316. Furthermore, the inner surface of the positive friction layer 312 or the negative friction layer 316 is evenly distributed with raised contact parts 317, which is conducive to the contact and friction between the positive friction layer 312 and the negative friction layer 316. The material of the positive friction layer 312 is conductive fiber; the negative friction layer 316 is a composite film formed by injecting conductive material, and the conductive material is 1-butyl-3-methylimidazole bis trifluoromethanesulfonyl imide salt. The material of the electrical insulation layer 314 is polyethylene terephthalate (PET).

[0032] As a further improvement of the above solution, a metal electrode 318 is attached to the outer surface of the positive friction layer 312 and / or the negative friction layer 316. The metal electrode 318 is preferably a thin sheet made of metal or alloy materials such as copper and titanium.

[0033] See also Figure 4 As a further improvement of the above solution, the sanitary product replacement reminder system 30 also includes a capacitor 36 connected in parallel to the friction power generation device 31 through the conductive fabric 35; the capacitor 36 is preferably a micro-chip capacitor.

[0034] See also Figure 5 As a further improvement of the above scheme, the sanitary product replacement reminder system 30 includes a plurality of friction power generation devices 31 connected in parallel with each other through the conductive fabric 35, and the friction power generation devices 31 are respectively arranged at one or more positions of the front, back, left, and right parts of the sanitary napkin close to the human abdomen and / or thighs and / or buttocks.

[0035] As a further improvement of the above scheme, the sanitary product replacement reminder system also includes a sensor component for detecting relevant data of the human body and / or menstrual blood and / or sanitary napkin environment and feeding back to the microcontroller 32 for processing; the sensor component is connected in series with the microcontroller 32. The sensor component is one or more of a temperature sensor, a liquid flow sensor, a humidity sensor, a bacteria detection sensor, and an odor detection sensor. The temperature sensor can detect the ambient temperature, the user's body temperature data, and the sanitary napkin temperature data; the liquid flow sensor can monitor the amount of menstrual blood; the humidity sensor can detect the menstrual blood adsorption of the sanitary napkin; the bacteria detection sensor can detect the bacteria index in the hygiene; and the odor detection sensor is used to detect whether there is an odor. The sensor component transmits the detection result to the microcontroller and sends it to the external terminal device through the signal transceiver to judge its physiological health status. In addition, a reference range can be set in the external terminal device and compared with the test result. Once the test result exceeds the reference range, the reminder function is activated to remind the user; or a reference range can be set in the microcontroller 32 and compared with the test result. Once the test result exceeds the reference range, a reminder signal is transmitted to the signal transceiver 34 and sent to the external terminal device through the signal transceiver 34.

[0036] As a further improvement of the above solution, the temperature sensor of the sensing component is used to detect the ambient temperature of the sanitary napkin and / or the user's body temperature data and / or the sanitary napkin temperature data and transmit the detection result to the microcontroller 32. When the detection result is close to the human body temperature (for example, greater than or equal to 35.5 degrees Celsius), the microcontroller 32 automatically controls to start the timer 33. The temperature sensor of this solution assists the automatic start timing function of the sanitary napkin that can prompt replacement.

[0037] See also Figure 6 , the testing method of the present invention is as follows:

[0038] 1. Prepare a sample of a friction power generation device, comprising the following steps:

[0039] (1) Cut the prepared conductive fiber (positive friction layer 312) and conductive copper tape (metal electrode 318) into squares of 2.5 cm × 2.5 cm;

[0040] (2) attaching a composite film (negative friction layer 316) on top of the conductive copper tape (metal electrode 318), and cutting the composite film (negative friction layer 316) into a size equal to that of the copper tape (metal electrode 318);

[0041] (3) A 2 cm × 2 cm PET film with a cavity structure (electrical insulation layer 314) is attached to the surface of the composite film (negative friction layer 316), and the conductive fiber (positive friction layer 312) is placed on top for integration;

[0042] (4) The four sides are sealed with epoxy resin glue to obtain a sample of the friction power generation device 31.

[0043] 2. Attach the sample of the friction power generation device 31 to the joint of the index finger, gradually bend the index finger by 45° / 90°, and straighten it, and test the output voltage and output current of the sample when the index finger is at different bending degrees.

[0044] The sample of this embodiment is attached to the joint of the index finger and the index finger is gradually bent 45 degrees and straightened. The test results are shown in Figure 7 The sample of this embodiment is attached to the joint of the index finger and gradually bent 90° and straightened. The test results are shown in Figure 8 From the test results, it can be seen that when the index finger is bent and straightened, the friction power generation device 31 can generate current.

[0045] When a user uses a sanitary napkin including the sanitary product replacement reminder system, a slight movement during the wearing process can cause the positive friction layer 312 and the negative friction layer 316 of the friction power generation device 31 in the sanitary product replacement reminder system to contact and rub against each other through the electrical insulation layer 314 of the hollow structure to generate current, and the conductive fabric 35 transmits the current to the microcontroller 32, the timer 33, and the signal transceiver 34. The timer 33 starts to count automatically. When the predetermined time (such as 3 hours) is reached, the microcontroller 32 controls the signal transceiver 34 to send a reminder signal to the external terminal device to realize the reminder replacement function. In this way, the usage time of the sanitary napkin can be monitored to avoid the situation where the user forgets to change the sanitary napkin.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A sanitary napkin capable of prompting replacement, comprising a surface layer, an absorbent core layer, a bottom layer, a sanitary product replacement reminder system arranged between the absorbent core layer and the bottom layer, and an insulating waterproof layer that wraps and seals the sanitary product replacement reminder system; the sanitary product replacement reminder system comprises a friction power generation device, a microcontroller, a timer and a signal transceiver that are sequentially connected in series to form a loop; the friction power generation device comprises a positive friction layer, a negative friction layer and an electrical insulation layer arranged between the positive friction layer and the negative friction layer; the electrical insulation layer is a hollow structure, and the positive friction layer and the negative friction layer can pass through the electrical insulation layer to contact each other and generate current by friction; the timer is used for timing, and when the timing duration of the timer reaches a preset duration, the microcontroller controls the signal transceiver to send a reminder signal to an external terminal.

2. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: Metal electrodes are attached to the outer surfaces of the positive friction layer and / or the negative friction layer.

3. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The sanitary product replacement reminder system also includes a capacitor connected in parallel to the friction power generation device.

4. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: A plurality of raised contact portions are evenly distributed on the inner surface of the positive friction layer or the negative friction layer.

5. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The material of the positive friction layer is conductive fiber; the negative friction layer is a composite film formed by injecting conductive material; the conductive material is 1-butyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt.

6. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The material of the electrical insulation layer is polyethylene terephthalate.

7. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The sanitary product replacement reminder system also includes a conductive fabric, which is used for electrical connection of the friction power generation device, the microcontroller, the timer and the signal transceiver.

8. The sanitary napkin capable of prompting replacement according to claim 7, characterized in that: The conductive fabric is prepared by weaving carbon nanotube fibers with one or more of cotton, linen, wool or chemical fibers into carbon nanotube yarns.

9. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The sanitary product replacement reminder system includes a plurality of friction power generation devices connected in parallel, and the friction power generation devices are respectively arranged at one or more positions of the front, rear, left and right parts of the sanitary napkin.

10. The sanitary napkin capable of prompting replacement according to claim 1, characterized in that: The sanitary product replacement reminder system also includes a sensor component connected in series with the microcontroller, and the sensor component is one or more of a temperature sensor, a liquid flow sensor, a humidity sensor, a bacteria detection sensor, and an odor detection sensor.

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