Pressure sensing device and penetration enhancer
By using a pressure sensor to monitor the user's pressure in real time, the problem of excessive force in microneedle transdermal products is solved, protecting the skin and improving safety and effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU NASHENG MICROELECTRONICS CO LTD
- Filing Date
- 2025-01-15
- Publication Date
- 2026-05-15
AI Technical Summary
Users may apply excessive force when using microneedle transdermal products, leading to skin damage and product malfunction. Furthermore, counterfeit or substandard products can mislead consumers into believing that genuine products are ineffective.
Design a pressure sensing device, including inner and outer cylinders, elastic element and prompting element. Through the cooperation of the preset elastic force of the elastic element and the limiting groove, the device can sense the user's pressing pressure in real time and issue a prompt signal when the pressure is excessive to prevent excessive force.
It effectively prevents users from applying excessive force, protects the skin structure, ensures the product functions properly, and enhances user experience and care results.
Smart Images
Figure CN224235388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to accessories and instruments for transdermal permeation enhancement in the field of microneedle transdermal permeation enhancement technology, and in particular, to a pressure sensing device and a permeation enhancement instrument. Background Technology
[0002] Microneedle transdermal drug delivery technology is a widely used drug delivery technique in recent years. It overcomes the barrier of the stratum corneum, allowing active ingredients to be efficiently absorbed transdermally. This technique enables targeted local drug delivery, improves drug absorption efficiency, and reduces the risk of overdose damage to organs such as the liver, showing broad application prospects in the medical and skin care fields.
[0003] In the field of skin care, traditional skin care methods, such as hyaluronic acid injections, involve inserting a needle under the skin to inject active ingredients deep into the skin. This process often results in significant pain and discomfort such as bleeding.
[0004] Microneedling transdermal penetration enhancement technology is an upgraded version of traditional skincare methods. Common microneedling transdermal penetration enhancement products include penetration enhancers and mesotherapy machines. These devices contain a high-speed motor that drives the delivery head to vibrate at high frequency. The delivery head is equipped with microneedle chips, which have a base and raised units formed on the base. The raised units are finely sized and can overcome the barrier of the stratum corneum, allowing active ingredients to be absorbed transdermally with high efficiency. During use, the user simply holds the device and uses the delivery head to repeatedly puncture and treat the skin, overcoming the barrier of the stratum corneum and promoting the efficient absorption of active ingredients.
[0005] Because microneedle chips primarily target the stratum corneum of the skin, they do not damage nerve endings and capillaries deep within the skin. Therefore, there is no pain or bleeding during use. However, many counterfeit microneedle products exist on the market, claiming to promote efficient transdermal absorption of active ingredients. However, due to the crude processing technology and declining product quality, users may experience stinging and bleeding during the treatment.
[0006] The skin discomfort caused by these counterfeit microneedling products is similar to that of traditional mesotherapy treatments, leading many consumers to believe that microneedling products can only achieve skin-beautifying effects if they cause pain or bleeding. However, this is a misconception.
[0007] This misconception leads many consumers to apply excessive pressure when using genuinely qualified microneedling transdermal products, attempting to feel stinging or bleeding to ensure their skin is receiving effective care. However, this excessive pressure can damage the skin structure and cause the delivery head to malfunction, negatively impacting the user experience. This misconception and incorrect application method lead consumers to mistakenly believe that genuinely qualified microneedling products are ineffective, of poor quality, and prone to causing skin damage. Summary of the Invention
[0008] To address the issue of excessive force that users often apply when using microneedle transdermal products, this invention provides a pressure sensing device and a permeation enhancer.
[0009] The pressure sensing device includes an outer cylinder with a limiting groove on its inner wall; an inner cylinder fitted inside the outer cylinder with a limiting buckle that engages with the limiting groove; a control unit within the inner cylinder; and an elastic element connected between the inner and outer cylinders, the elastic element having a preset elastic force and capable of securing the limiting buckle to the limiting groove. The pressure sensing device also includes an indicator element, a first element, and a second element electrically connected to each other. The first element is fixedly disposed within the outer cylinder, and the second element is movably disposed within the outer cylinder and connected to the control unit. When no external force is applied, the first element separates from the second element, disconnecting the circuit of the indicator element. When the inner cylinder is moved relative to the outer cylinder by an external force, the control unit causes the second element to contact the first element, activating the circuit of the indicator element.
[0010] The above technical solution is explained as follows.
[0011] Elastic components: In this technical solution, elastic components can take many specific forms, such as springs, or elastic pads, elastic cylinders, elastic ropes, etc. made of rubber or silicone materials, or other suitable structures or materials that can generate sufficient preset elastic force.
[0012] Preset elastic force: In this technical solution, the preset elastic force enables the limiting buckle to be tightly fastened to the limiting groove. By adjusting the magnitude of the preset elastic force of the elastic element, the magnitude of the external force required for the first and second elements to contact and conduct the circuit can be adjusted. In particular, when a spring is selected as the elastic element, the compression deformation of the spring is linearly related to the pressure, and it can be precisely and quantitatively adjusted according to design requirements.
[0013] Indicating elements: In this technical solution, the indicating elements have various specific forms, such as an indicator light that emits an indicator light, an indicator bell or buzzer that emits an indicator sound, a vibrator that emits vibrations, etc.
[0014] Activity settings: In this technical solution, the activity settings have multiple motion forms, such as the second element being able to reciprocate along the axial direction of the outer cylinder, or the second element being able to deflect slightly relative to the cross-section of the outer cylinder, or a combination of axial translation and deflection.
[0015] Connection: In this technical solution, "connection" includes fixed connection, detachable connection, or integral connection; it can be direct connection, indirect connection through intermediate media such as components, or abutment connection between two elements or parts.
[0016] In this technical solution, the prompting element, the first element, and the second element are powered by a power supply. The power supply can be an independent power supply specifically for powering the prompting element, or it can be a power supply that simultaneously supplies multiple electrical devices.
[0017] The beneficial effects of this technical solution are as follows: This technical solution combines an inner cylinder, an outer cylinder, and an elastic element to form a pressure sensing device with a preset elastic force. When no external force is applied, the elastic element locks the limiting buckle onto the limiting groove, thus locking the relative position of the inner and outer cylinders; in this state, the first and second elements remain separated and disconnected. When an external force is applied to the inner cylinder, such as when a user controls the pressure sensing device to contact and press against the skin, the inner cylinder moves relative to the axis of the outer cylinder due to the skin's action. During this process, the elastic element deforms; the second element, connected to the control unit of the inner cylinder, also moves synchronously within the outer cylinder, gradually approaching the first element. As the user increases the pressure on the skin, the movement of the inner cylinder relative to the outer cylinder increases until the second element contacts the first element. At this point, the circuit of the prompting element is activated, and the prompting element emits light, sound, and vibration signals to remind the user that the pressure applied to the skin is excessive and exceeds the safe range.
[0018] The pressure sensing device in this technical solution has a sophisticated structure, with inner and outer cylinders nested together. Its hollow area allows for convenient reciprocating movement of the infusion head on the permeation device without interfering with the device's operation. This device integrates seamlessly with the permeation device, sensing the contact pressure between the device and the skin in real time while the user is using the device for skin care. It promptly alerts the user to the appropriate application pressure, ensuring the effectiveness and safety of the permeation device treatment.
[0019] Preferably, when no external force is applied, the upper end of the inner cylinder extends beyond the outer cylinder. In this preferred embodiment, the upper end of the inner cylinder is able to contact the skin first, thereby more accurately sensing the pressure applied to the skin.
[0020] Preferably, the upper end of the elastic element is connected to the inner wall, outer wall, or lower end of the inner cylinder, and the lower end of the elastic element is connected to the inner wall of the outer cylinder. It should be noted that the "connection" in this preferred technical solution includes fixed connection, detachable connection, or integral connection; it can be a direct connection, an indirect connection through intermediate media such as components, or a mating connection between two elements or parts. For example, the lower end of the elastic element can be directly connected to the inner wall of the outer cylinder, or it can be connected to a component disposed on the inner wall of the outer cylinder to achieve an "indirect connection" between the elastic element and the inner wall of the outer cylinder, as long as the component can restrict the downward displacement of the elastic element.
[0021] Preferably, a limiting platform is provided on the inner wall of the outer cylinder, and the lower end of the elastic element is connected to the limiting platform. In this preferred technical solution, the limiting platform structure facilitates the installation and fixing of the elastic element, reducing assembly difficulty. Furthermore, the cooperation between the limiting platform and the first element can limit the movement of the second element, better protecting it.
[0022] More preferably, the second element is disposed between the limiting stage and the first element.
[0023] Preferably, the limiting buckle is disposed at the lower end of the inner cylinder, and there are multiple limiting buckles, which are equidistantly distributed at the lower end of the cylinder; there are multiple limiting grooves, which are equidistantly distributed on the inner wall of the inner cylinder, and each limiting groove is directly opposite to each limiting buckle.
[0024] More preferably, the upper end of the elastic element is connected to the limiting buckle. This preferred structure enhances the firmness of the fit between the limiting buckle and the limiting groove.
[0025] Preferably, the first element is fixed in a ring shape on the inner wall of the outer cylinder, and the relative position of the first element and the outer cylinder does not change.
[0026] Preferably, the second element is arranged in a ring shape inside the outer cylinder, and the second element is capable of reciprocating or deflecting relative to the outer cylinder and the first element.
[0027] More preferably, a connecting ring is provided on the inner wall of the inner cylinder, the upper end of the control part is fixed on the connecting ring, and the lower end of the control part is fixedly connected to the second element.
[0028] More preferably, the upper end of the inner cylinder is folded inward to form the connecting ring. In this preferred embodiment, the connecting ring enables the control unit to be fixed more stably and securely, and at the same time, the connecting ring can increase the contact area between the upper end of the inner cylinder and the skin, thereby more accurately sensing the pressure applied to the skin.
[0029] Preferably, the control unit includes a control lever, the upper end of which is fixed to the connecting ring, and the lower end of which is fixedly connected to the second element.
[0030] More preferably, the control rods are multiple, with the upper ends of each control rod evenly distributed in the circumferential direction of the connecting ring, and the lower ends of each control rod evenly distributed in the circumferential direction of the second element, so as to realize multi-point and multi-directional linkage between the inner cylinder and the second element.
[0031] During skin care, the upper end of the inner tube of the penetration enhancer may be at an angle when it contacts the skin. In this case, the upper end of the inner tube will not be directly facing the skin; only a portion of the arc will initially contact the skin. In this preferred embodiment, control rods are evenly distributed circumferentially between the connecting ring and the second element, forming a polygonal mesh-like structure. When the upper end of the inner tube makes inclined contact with the skin, the mesh-like structure will tilt slightly as it moves. Driven by multiple control rods, the second element will also tilt at the same amplitude and angle. When a portion of the arc of the second element contacts the first element, the circuit of the indicator element will be activated, reminding the user of excessive force.
[0032] Therefore, the mesh cylinder structure in this technical solution can transmit pressure more timely and accurately. No matter what angle the user controls the permeation enhancer to contact the skin, when any arc segment of the upper end of the inner cylinder contacts the skin, the second element connected to the other end of the control rod will also move or deflect synchronously, thereby realizing multi-point, multi-directional, and multi-angle pressure monitoring and effectively improving the accuracy of pressure sensing.
[0033] More preferably, the number of control levers is 3, 4, 5, 6, 7 or 8.
[0034] Preferably, the control unit includes a control cylinder, the upper end of which is fixed to the connecting ring, and the lower end of which is fixedly connected to the second element, so as to realize omnidirectional linkage between the inner cylinder and the second element. In this technical solution, the control cylinder can be a cylindrical cylinder or a polygonal prism cylinder.
[0035] The pressure sensing device in the above technical solution can be mounted on an osmosis enhancer. Therefore, this utility model also provides an osmosis enhancer. The osmosis enhancer includes a housing, a power supply, a drive motor, a transmission rod, and an inlet head, and also includes the pressure sensing device described in any of the above technical solutions. The outer cylinder of the pressure sensing device is fixed on the housing, the indicator element of the pressure sensing device is powered by the power supply, the inlet head is mounted on the transmission rod, and the inlet head can reciprocate along the axis of the inner cylinder under the drive of the drive motor and the transmission rod.
[0036] Preferably, the infusion head includes a skin treatment unit, which includes a substrate and protruding units formed on the substrate. In this technical solution, the protruding units can be made of monocrystalline silicon, metal, ceramic, polymer materials, etc.
[0037] Preferably, the skin treatment unit is a nanocrystal, and the height of the protruding unit on the nanocrystal is no greater than 1000 nanometers.
[0038] Preferably, the inlet head has an upper position and a lower position when it reciprocates relative to the inner cylinder. When the inlet head is in the upper position, the skin treatment unit extends beyond the upper end of the inner cylinder; when the inlet head is in the lower position, the skin treatment unit is retracted into the upper end of the inner cylinder.
[0039] In this preferred embodiment, the reciprocating motion of the infusion head has a certain range. The position where the infusion head moves upward to its limit is defined as the upper position, and the position where the infusion head moves downward to its limit is defined as the lower position. In this preferred embodiment, when the infusion head is in the lower position, the skin treatment unit is retracted into the upper end of the inner cylinder, that is, the skin treatment unit is lower than the upper end of the inner cylinder.
[0040] When a user uses the penetration enhancer to care for their skin, the skin treatment unit repeatedly touches the skin in a direction perpendicular to the skin. When the user slides the penetration enhancer laterally along the skin surface, there is some resistance between the skin treatment unit and the skin. In this preferred embodiment, when the applicator head is in the lower position, the skin treatment unit retracts into the end of the inner cylinder, and the protruding unit on the skin treatment unit briefly separates from the skin. In this state, only the smooth inner cylinder of the penetration enhancer contacts the skin, significantly reducing the resistance to sliding relative to the skin. This allows the penetration enhancer to glide smoothly along the skin surface, improving the user experience. More importantly, this design avoids lateral scratches to the skin caused by the protruding unit during the sliding treatment, improving the skin care effect of the penetration enhancer. Attached Figure Description
[0041] Figure 1 This is a schematic diagram of the cross-sectional structure of the pressure sensing device of this utility model when it is not subjected to external force in Embodiment 1.
[0042] Figure 2 This is a schematic diagram of the cross-sectional structure of the inlet head under pressure in Embodiment 1 of the pressure sensing device of this utility model.
[0043] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the permeation enhancer of this utility model.
[0044] Figure 4 This is a schematic diagram of the cross-sectional structure of the pressure sensing device of this utility model when it is not subjected to external force in Embodiment 2.
[0045] List of reference numerals in the attached diagram:
[0046] A. Pressure sensing device; T. Permeation enhancer; 1. Outer cylinder; 11. Lower end of outer cylinder; 12. Upper end of outer cylinder; 10. Limiting groove; 13. Limiting platform; 2. Inner cylinder; 21. Lower end of inner cylinder; 22. Upper end of inner cylinder; 23. Limiting buckle; 24. Connecting ring; 25. Connecting rod; 3. Connecting piece; 4. Second element; 40. Indicating element; 5. First element; 6. Drive motor; 7. Injection head; 8. Skin treatment unit; 9. Power supply. Detailed Implementation
[0047] The following embodiments further explain and illustrate this technical solution. It should be noted that the following embodiments are only used to make the inventive concept and design idea of this technical solution clearer and are not intended to limit the protection scope of this utility model. It is readily understood that other embodiments completed under the guidance of the inventive concept of this technical solution should also fall within the protection scope of this utility model.
[0048] It should be noted that in the description of this utility model, terms such as "upper," "lower," "inner," and "outer," indicating direction, orientation, or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, terms such as "connection," "assembly," "installation," "setting," and "arrangement," 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 direct connection or an indirect connection through an intermediate medium; they can refer to abutting connection between two components or parts; or they can refer to internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example 1
[0049] To address the issue of excessive force that users may experience when using microneedle transdermal products, this embodiment provides a permeation enhancer equipped with a pressure sensing device. Figure 1 This is a schematic diagram of the cross-sectional structure of the pressure sensing device of this utility model when it is not subjected to external force in Embodiment 1. Figure 2 This is a schematic diagram of the cross-sectional structure of the inlet head under pressure in Embodiment 1 of the pressure sensing device of this utility model. Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the permeation enhancer of this utility model.
[0050] like Figure 3As shown, the penetration enhancer T has a housing, within which a power supply 9 and a drive motor 6 are housed. The drive motor 6 is powered by the power supply 9. A transmission mechanism, such as a transmission rod, is connected to the output shaft of the drive motor 6, and an infusion head 7 is detachably mounted at the end of the transmission rod. The infusion head 7 is provided with a skin treatment unit 8, which includes a substrate and raised units formed on the substrate. In this embodiment, the raised units can be made of monocrystalline silicon, metal, ceramic, polymer materials, etc. Optionally, the skin treatment unit 8 is a nanocrystal formed from monocrystalline silicon. In some embodiments, the height of the raised units is no greater than 1000 nanometers.
[0051] like Figure 3 As shown, a pressure sensing device A is installed at the end of the permeation enhancer T. Figure 1 or Figure 2 As shown, the pressure sensing device A has an outer cylinder 1. In this embodiment, the outer cylinder 1 is fixed to the outer shell of the permeation enhancer T. It is easy to understand that the outer cylinder 1 can be integrally formed with the outer shell. Alternatively, the outer cylinder 1 and the outer shell can also be machined separately and then detachably assembled.
[0052] like Figure 1 As shown, in this embodiment, the outer cylinder 1 is a straight cylinder. Alternatively, the outer cylinder 1 can also be a hollow truncated cone cylinder. Figure 1 As shown, the outer cylinder 1 has an upper cylinder end 12 and a lower cylinder end 11. In this embodiment, the outer cylinder 1 is fixedly connected to the outer shell of the permeation enhancer T via the lower cylinder end 11. Figure 1 As shown, limiting grooves 10 are provided on the inner wall of the outer cylinder 1. In this embodiment, there are four limiting grooves 10, which are evenly distributed circumferentially on the inner wall of the outer cylinder 1. In this embodiment, the limiting grooves 10 are wedge-shaped grooves with a gradually changing depth, with the wide bottom end of the wedge-shaped groove facing upward and the pointed end facing downward, that is, the depth of the wedge-shaped groove gradually increases upward with the axial direction of the outer cylinder 1. Alternatively, the limiting grooves 10 can also be rectangular grooves with a consistent depth or other suitable structures. Figure 1 As shown, a limiting platform 13 is also provided on the inner wall of the outer cylinder 1. In this embodiment, the limiting platform 13 is a ring-shaped protrusion on the inner wall of the outer cylinder 1. Alternatively, the limiting platform 13 may be one or more protrusions distributed on the inner wall of the outer cylinder 1.
[0053] like Figure 1As shown, an inner cylinder 2 is coaxially arranged inside the outer cylinder 1. The inner cylinder 2 is positioned near the upper cylinder end 12 of the outer cylinder 1. The inner cylinder 2 has an upper cylinder end 22 and a lower cylinder end 21. In this embodiment, a limiting buckle 23 is provided at the lower cylinder end 21 of the inner cylinder 2. In this embodiment, there are four limiting buckles 23, which are evenly distributed circumferentially on the lower cylinder end 21 of the inner cylinder 2. Each limiting buckle 23 is directly opposite and structurally matched with a limiting groove 10, and the limiting buckle 23 snaps against the wide bottom end of the limiting groove 10.
[0054] like Figure 1 or Figure 2 As shown, an elastic element 3 is provided between the inner cylinder 2 and the outer cylinder 1. The elastic element 3 can be a spring, or an elastic pad, elastic cylinder, elastic rope, etc., made of rubber or silicone. In this embodiment, the upper end of the elastic element 3 abuts against or is mounted on the limiting buckle 23. It is easily understood that in some other embodiments, the upper end of the elastic element 3 can also be connected to the inner wall, outer wall, or lower cylinder end 21 of the inner cylinder 2. Figure 1 As shown, in this embodiment, the lower end of the elastic element 3 abuts against or is connected to the limiting platform 13. It is easily understood that in some other embodiments, the lower end of the elastic element 3 can be directly fixed to the inner wall of the outer cylinder 1, thereby simplifying the structure of the limiting platform 13. The elastic element 3 has a preset elastic force, the magnitude of which can be adjusted according to functional requirements. Under the action of the elastic element 3, the inner cylinder 2 tends to extend upwards, and the limiting buckle 23 on the inner cylinder 2 abuts against the wide bottom end of the limiting groove 10. When no other external force is applied, the upper cylinder end 22 of the inner cylinder 2 extends from the upper cylinder end 12 of the outer cylinder 1.
[0055] like Figure 1 or Figure 2 As shown, a first element 5 is also provided inside the outer cylinder 1. In this embodiment, the first element 5 is annular or cylindrical, and is fixedly installed on the inner wall of the outer cylinder 1. The relative position of the first element 5 and the outer cylinder 1 does not change. Figure 1 or Figure 2 As shown, a second element 4 is disposed between the first element 5 and the limiting stage 13. It is readily understood that when the structure of the limiting stage 13 is changed or omitted, the second element 4 can also be disposed in other suitable positions. For example... Figure 1 or Figure 2 As shown, the second element 4 is movably disposed within the outer cylinder 1. The second element 4 can reciprocate relative to the outer cylinder 1 along its axis, or deviate at a certain angle relative to its axis, or a combination of both. In this embodiment, the second element 4 is annular. It is readily understood that the second element 4 can also be designed in other suitable shapes.
[0056] This pressure sensing device A also has a prompting element 40. For example... Figure 3As shown, in this embodiment, the indicator element 40 is disposed within the outer casing of the osmosis enhancer T. It is readily apparent that the indicator element 40 could also be disposed inside the outer cylinder 1, or in other suitable locations. The indicator element 40 can take various forms, such as an indicator light emitting light, an indicator bell or buzzer emitting sound, or a vibrator emitting vibration. In this technical solution, the indicator element 40 is electrically connected to the first element 5 and the second element 4. The circuit of the indicator element 40 can be connected or disconnected when the first element 5 and the second element 4 are in contact or separated. In this embodiment, the indicator element 40 is powered by the power supply 9. It is readily understood that in some other embodiments, the indicator element 40 may also be powered by an independent power supply.
[0057] In this first embodiment, a connecting ring 24 is also provided on the inner wall of the inner cylinder 2, and a control part capable of controlling the movement of the second element 4 is fixed on the connecting ring 24. Figure 1 or Figure 2 As shown, the upper end 22 of the inner cylinder 2 is folded inward to form a connecting ring 24. The upper ring surface of the connecting ring 24 is flush with the upper end 22 of the inner cylinder 2, forming a larger contact area. The inner diameter of the connecting ring 24 is larger than the size of the inlet head 7 and the skin treatment unit 8. It is easy to understand that in some other embodiments, the connecting ring 24 may also be located inside the inner cylinder 2, not near the upper end 22. In this embodiment, the control unit is a control lever 25. Figure 1 or Figure 2 As shown, the control rod 25 extends axially along the inner cylinder 2. The upper end of the control rod 25 is fixedly connected to the lower ring surface of the connecting ring 24, and the lower end of the control rod 25 is fixedly connected to the upper ring surface of the second element 4. In this embodiment, there are four control rods 25, which are evenly arranged circumferentially between the connecting ring 24 and the second element 4. The four control rods 25, the connecting ring 24, and the second element 4 combine to form a fixed polygonal prism-shaped mesh structure. Regardless of the angle at which the user controls the permeation device T to contact the skin, when any area on the upper cylinder end 22 of the inner cylinder 2 contacts the skin, this mesh structure can quickly and accurately transmit the skin pressure to the second element 4, thereby realizing multi-point, multi-directional, and multi-angle pressure monitoring.
[0058] In this first embodiment, when the penetration enhancer T is not in use, the pressure sensing device A is not subjected to external force, and the elastic element 3 pushes the inner cylinder 2 upward. The upper end 22 of the inner cylinder 2 extends from the upper end 12 of the outer cylinder 1. The second element 4, which is connected to the inner cylinder 2 via the control rod 25, is in the upper position, and the second element 4 is separated from the first element 5. In this state, the circuit of the prompting element 40 is disconnected, and the prompting element 40 is not working. When the user uses the penetration enhancer T to care for the skin, the introductory head 7 passes through the inner cylinder 2 and is fixed on the transmission rod. After the instrument switch is turned on, the drive motor 6 drives the introductory head 7 to reciprocate along the axis of the inner cylinder 2. The skin treatment unit 8 on the introductory head 7 can repeatedly unclog the stratum corneum of the skin at a high frequency, improving the skin's absorption efficiency of effective ingredients. During the care process, the upper end 22 of the inner cylinder 2 outside the introductory head 7 is also in contact with the skin. When the user applies excessive force, the force of the skin on the inner cylinder 2 increases, causing the inner cylinder 2 to retract into the outer cylinder 1. Therefore, the elastic element 3 is elastically compressed, and simultaneously, the second element 4, which is connected to the inner cylinder 2 via the control lever 25, moves closer to the first element 5. When the user applies more force than the safe value when using the permeation enhancer T, the second element 4 contacts the first element 5 and activates the circuit of the indicator element 40. At this time, the indicator element 40 will emit light, sound, and vibration signals to remind the user that excessive force has been applied during operation.
[0059] It should be noted that in this technical solution, by adjusting the preset elastic force on the elastic element 3, the magnitude of the external force required for the first element 5 and the second element 4 to contact and conduct the circuit can be adjusted, thereby achieving the maximum safe value of the operating force of the permeation enhancer T. When the elastic element 3 is a spring, the spring's compression deformation is linearly related to the pressure, and can be precisely and quantitatively adjusted according to design requirements.
[0060] It should be noted that the reciprocating motion of the infusion head 7 has a certain range. For ease of explanation, the position where the infusion head 7 moves upward to its limit is defined as the upper position, and the position where the infusion head 7 moves downward to its limit is defined as the lower position. The infusion head 7 has an upper position and a lower position when it reciprocates relative to the inner cylinder 2. In some embodiments, when the infusion head 7 is in the upper position, the skin treatment unit 8 extends beyond the upper cylinder end 22 of the inner cylinder 2; when the infusion head 7 is in the lower position, the skin treatment unit 8 is retracted into the upper cylinder end 22 of the inner cylinder 2. That is, the skin treatment unit 8 is lower than the upper cylinder end 22 of the inner cylinder 2.
[0061] When a user uses the penetration enhancer T to care for their skin, the skin treatment unit 8 repeatedly touches the skin in a direction perpendicular to the skin. When the user slides the penetration enhancer T laterally along the skin surface, there is some resistance between the skin treatment unit 8 and the skin. In this preferred embodiment, when the infusion head 7 is in the lower position, the skin treatment unit 8 retracts into the end of the inner cylinder 2, and the protruding unit on the skin treatment unit 8 briefly separates from the skin. In this state, only the smooth inner cylinder of the penetration enhancer T contacts the skin, significantly reducing the resistance to sliding the penetration enhancer T relative to the skin. This allows the penetration enhancer T to glide smoothly along the skin surface, improving the user's experience. More importantly, this design avoids lateral scratches to the skin caused by the protruding unit during the sliding process, improving the skin care effect of the penetration enhancer T. Example 2
[0062] Figure 4 This is a schematic diagram of the cross-sectional structure of the pressure sensing device of this utility model when it is not subjected to external force, as shown in Embodiment 2. Figure 4 As shown, unlike Embodiment 1, in this Embodiment 2, the control unit is a control cylinder 26. The control cylinder 26 is coaxially disposed within the inner cylinder 2, with its upper end fixed to the lower annular surface of the connecting ring 24, and its lower end fixedly connected to the upper annular surface of the second element 4. In this Embodiment 2, the control cylinder 26 is cylindrical. Alternatively, the control cylinder 26 can also be a polygonal prism shape.
Claims
1. A pressure sensing device, comprising an outer cylinder, characterized in that, A limiting groove is provided on the inner wall of the outer cylinder; The pressure sensing device also includes an inner cylinder, which is fitted inside the outer cylinder. A limit buckle is provided on the inner cylinder, and the limit buckle can be matched with the limit groove for limiting; the inner cylinder also has a control part. An elastic element is connected between the inner cylinder and the outer cylinder. The elastic element has a preset elastic force and can make the limiting buckle fasten tightly onto the limiting groove. The pressure sensing device also includes a prompting element, a first element, and a second element that are electrically connected to each other. The first element is fixedly disposed inside the outer cylinder, and the second element is movably disposed inside the outer cylinder and connected to the control unit; When no external force is applied, the first element separates from the second element to disconnect the circuit of the prompting element; When the inner cylinder moves relative to the outer cylinder under the action of an external force, the control unit drives the second element to contact the first element and activates the circuit of the prompting element.
2. The pressure sensing device according to claim 1, characterized in that, When no external force is applied, the upper end of the inner cylinder extends out of the outer cylinder.
3. The pressure sensing device according to claim 1, characterized in that, The upper end of the elastic element is connected to the inner wall, outer wall or lower end of the inner cylinder, and the lower end of the elastic element is connected to the inner wall of the outer cylinder.
4. The pressure sensing device according to claim 3, characterized in that, A limiting platform is provided on the inner wall of the outer cylinder, and the lower end of the elastic element is connected to the limiting platform.
5. The pressure sensing device according to claim 4, characterized in that, The second element is disposed between the limiting stage and the first element.
6. The pressure sensing device according to claim 1, characterized in that, The limiting buckle is disposed at the lower end of the inner cylinder, and there are multiple limiting buckles, which are equidistantly distributed at the lower end of the cylinder; there are multiple limiting grooves, which are equidistantly distributed on the inner wall of the inner cylinder, and each limiting groove is directly opposite and matched with each limiting buckle.
7. The pressure sensing device according to claim 6, characterized in that, The upper end of the elastic element is connected to the limiting buckle.
8. The pressure sensing device according to claim 1, characterized in that, The first element is fixed in a ring shape on the inner wall of the outer cylinder, and the relative position of the first element and the outer cylinder does not change.
9. The pressure sensing device according to any one of claims 1-8, characterized in that, The second element is arranged in a ring shape inside the outer cylinder, and the second element is capable of reciprocating or deflecting relative to the outer cylinder and the first element.
10. The pressure sensing device according to claim 9, characterized in that, A connecting ring is provided on the inner wall of the inner cylinder, the upper end of the control part is fixed on the connecting ring, and the lower end of the control part is fixedly connected to the second element.
11. The pressure sensing device according to claim 10, characterized in that, The upper end of the inner cylinder is folded inward to form the connecting ring.
12. The pressure sensing device according to claim 10, characterized in that, The control unit includes a control lever, the upper end of which is fixed to the connecting ring, and the lower end of which is fixedly connected to the second element.
13. The pressure sensing device according to claim 12, characterized in that, The control rods are multiple in number, with the upper ends of each control rod evenly distributed around the connecting ring and the lower ends of each control rod evenly distributed around the second element, so as to realize multi-point and multi-directional linkage between the inner cylinder and the second element.
14. The pressure sensing device according to claim 13, characterized in that, The number of control levers is 3, 4, 5, 6, 7, or 8.
15. The pressure sensing device according to claim 10, characterized in that, The control unit includes a control cylinder, the upper end of which is fixed to the connecting ring, and the lower end of which is fixedly connected to the second element, so as to realize the omnidirectional linkage between the inner cylinder and the second element.
16. The pressure sensing device according to claim 1, characterized in that, The prompting signal emitted by the prompting element includes at least one of sound, light, and vibration.
17. A permeation enhancer, comprising a housing, a power supply, a drive motor, a transmission rod, and an inlet head, characterized in that, It also includes the pressure sensing device according to any one of claims 1-16, wherein the outer cylinder of the pressure sensing device is fixed on the housing, the prompting element of the pressure sensing device is powered by the power supply, the inlet head is mounted on the transmission rod, and the inlet head can reciprocate on the axis of the inner cylinder under the drive of the drive motor and the transmission rod.
18. The permeation enhancer according to claim 17, characterized in that, The infusion head includes a skin treatment unit, which includes a base and protrusions formed on the base.
19. The permeation enhancer according to claim 18, characterized in that, The skin treatment unit is a nanocrystal, and the height of the protruding unit on the nanocrystal is no greater than 1000 nanometers.
20. The permeation enhancer according to claim 18, characterized in that, When the inlet head reciprocates relative to the inner cylinder, it has an upper position and a lower position. When the inlet head is in the upper position, the skin treatment unit extends beyond the upper end of the inner cylinder; when the inlet head is in the lower position, the skin treatment unit retracts into the upper end of the inner cylinder.