A laser therapy handpiece and laser therapy device

Abstract

This invention proposes a laser therapy handpiece and laser therapy device, relating to the field of laser therapy equipment technology. It includes a base, a laser emission assembly, a limiting seat, contact parts, a transmission component, and a light-shielding component. The base has a light-transmitting hole. One end of the laser emission assembly is connected to a laser source, and the other end is fixed to the base to emit a laser beam outward through the light-transmitting hole. This invention, by setting multiple contact parts distributed at the contact positions between the limiting seat and the spherical lens, a transmission component positioned between adjacent contact parts, and a light-shielding component movably mounted on the base and switchable between a first position blocking the light-transmitting hole and a second position opening the light-transmitting hole, and by connecting the transmission component and the light-shielding component, forms an anti-overflow light mechanism. This mechanism is completely independent of sensors, circuits, or software control, fundamentally avoiding the shortcomings of existing electronic anti-overflow light solutions that cannot effectively block laser emission in the event of circuit failure, signal abnormality, or control delay.

Description

Technical Field

[0001] This invention relates to the field of laser therapy equipment technology, and in particular to a laser therapy handpiece and a laser therapy device. Background Technology

[0002] Laser therapy, as a non-invasive phototherapy method, has been widely used in skin aesthetics, pain relief, and various medical rehabilitation fields. Laser therapy uses a laser beam of a specific wavelength to irradiate human tissue, achieving therapeutic effects through photothermal or photobiological modulation. During this procedure, the operator typically needs to hold the laser emitter close to the user's skin for irradiation. Therefore, the structural design of handheld laser therapy devices, i.e., laser therapy handpieces, directly affects ease of operation, safety, and therapeutic efficacy.

[0003] Currently, most existing laser therapy handpieces are long-handled, primarily used for light transmission and shaping, offering relatively limited functionality. In terms of safety, existing handpieces mainly rely on electronic detection methods to prevent accidental laser emission. For example, capacitive skin sensors or infrared distance sensors are placed near the light outlet. When the sensor detects the handpiece approaching or contacting the skin, the control circuit instructs the laser source to activate; when the sensor signal is interrupted, the control circuit instructs the laser source to deactivate. However, this electronic detection-based approach has inherent flaws. If the sensor malfunctions, the circuit fails, signal processing is abnormal, or the control system response is delayed, the effective ability to block laser emission may be lost, leading to accidental laser emission without skin contact and causing injury to the user's or operator's eyes and skin. Summary of the Invention

[0004] In view of this, the present invention proposes a laser therapy handpiece and a laser therapy device. By setting multiple contact parts distributed at the contact position between the limiting seat and the spherical lens, a transmission component set between adjacent contact parts, and a light-shielding component movably set on the base and switchable between a first position blocking the light-transmitting hole and a second position opening the light-transmitting hole, and by connecting the transmission component and the light-shielding component, a purely mechanical anti-overflow light linkage mechanism is formed. This mechanism does not rely on sensors, circuits or software control at all, fundamentally avoiding the defects of existing electronic anti-overflow light solutions that cannot effectively block laser emission in the event of circuit failure, signal abnormality or control delay, and significantly reducing the risk of accidental laser irradiation causing injury to the user or operator.

[0005] The technical solution of this invention is implemented as follows: In a first aspect, the present invention provides a laser therapy handpiece, comprising a base, a laser emission assembly, a limiting seat, a contact portion, a transmission component, and a light-shielding component, wherein... The base is provided with light-transmitting holes; One end of the laser emission assembly is connected to a laser source, and the other end is fixed to the base to emit the laser beam outward through the light-transmitting hole; The limiting seat is fixed on the base, and a spherical lens is rotatably accommodated inside the limiting seat. A portion of the spherical lens protrudes outside the limiting seat, and the portion inside the limiting seat is directly opposite the light-emitting direction of the light-transmitting hole. There are multiple contact parts, which are distributed at the positions where the limiting seat contacts the spherical lens, and the multiple contact parts are arranged at intervals around the spherical lens; The transmission component is disposed between two adjacent contact portions and is configured to be pushed by the spherical lens and displaced when the spherical lens is subjected to an external force toward the base; The light-shielding component is movably mounted on the base. The light-shielding component has a first position that blocks the light-transmitting hole and a second position that allows the light-transmitting hole to pass through. The light-shielding component is configured to return to the first position when the external force is removed. The transmission component is connected to the light-shielding component, so that when the spherical lens is pressed and pushes the transmission component, the light-shielding component moves from the first position to the second position.

[0006] In one embodiment, the transmission component is an elastic sheet, one end of which is fixed to the inner wall of the limiting seat, and the other end is connected to the light-shielding component. When the spherical lens is pressed, the transmission component is pushed by the spherical lens and undergoes elastic deformation, thereby driving the light-shielding component to move from the first position to the second position. When the external force is removed, the transmission component returns to its original state by its own elasticity and drives the light-shielding component to return from the second position to the first position.

[0007] In one embodiment, the contact portion is an arc-shaped protrusion formed on the inner wall of the limiting seat, and a receiving space for accommodating the transmission component is formed between two adjacent contact portions. When the spherical lens is pressed, the spherical lens forms line contact with all contact portions; when the external force is removed, there is an active gap between the spherical lens and at least one contact portion.

[0008] In one embodiment, the device further includes a spherical handheld housing, wherein the base and the limiting seat are both fixedly disposed inside the handheld housing, a portion of the spherical lens protrudes outside the handheld housing, and the spherical lens is rotatable relative to the handheld housing within the limiting seat.

[0009] In one embodiment, a flexible circuit board is also included, which is disposed inside the handheld housing and within the assembly gap formed between the inner wall of the handheld housing and the outer wall of the limiting seat, the flexible circuit board being arranged at least partially around the limiting seat.

[0010] In one embodiment, the device further includes an infrared imaging probe and a visible light camera. The infrared imaging probe is disposed on the handheld housing, and the laser emission assembly is provided with an extension handle. The visible light camera is disposed on the extension handle. Both the infrared imaging probe and the visible light camera are electrically connected to a flexible circuit board. The infrared imaging probe and the visible light camera are used to face the user's skin during the sliding use of the laser therapy handpiece, thereby acquiring skin image data.

[0011] In one embodiment, the system further includes an attenuator and a thermopile sensor. The attenuator is disposed between the laser emitting assembly and the thermopile sensor to attenuate a portion of the laser beam before projecting it onto the thermopile sensor. The thermopile sensor is electrically connected to a flexible circuit board. The flexible circuit board has a continuous bending structure that serves as a temperature measuring section to detect the temperature inside the handheld casing. The flexible circuit board is configured to calculate the temperature-compensated laser output power value based on the electrical signal output by the thermopile sensor and the temperature value detected by the temperature measuring section.

[0012] In one embodiment, the light-shielding member is slidably and translationally disposed on the base, moving linearly along the surface of the base between a first position and a second position.

[0013] In one embodiment, there are two transmission components arranged symmetrically, and two light-shielding components are respectively disposed at the ends of the two transmission components. When in the first position, the two light-shielding components cooperate to block the light-transmitting hole.

[0014] Secondly, the present invention provides a laser physiotherapy device, including a main unit and the aforementioned laser physiotherapy handpiece. The main unit and the laser physiotherapy handpiece are communicatively connected. A laser light source is provided on the main unit, and the laser emission component of the laser physiotherapy handpiece is optically connected to the laser light source.

[0015] The laser therapy handpiece and laser therapy device of the present invention have the following advantages over the prior art: 1. By setting multiple contact parts distributed at the contact position between the limiting seat and the spherical lens, a transmission component set between adjacent contact parts, and a light-shielding component movably set on the base and switchable between a first position blocking the light-transmitting hole and a second position opening the light-transmitting hole, and by connecting the transmission component and the light-shielding component, a purely mechanical anti-overflow light linkage mechanism is formed. This mechanism does not rely on sensors, circuits or software control at all, and fundamentally avoids the defects of existing electronic anti-overflow light solutions that cannot effectively block laser emission when there is a circuit failure, signal abnormality or control delay, and significantly reduces the risk of accidental laser irradiation causing injury to users or operators. 2. By setting the contact part as an arc-shaped protrusion and forming a receiving space between adjacent contact parts to accommodate the transmission component, the spherical lens forms line contact with all contact parts under pressure, resulting in uniform force and stable transmission. After the external force is removed, there is an active gap between the spherical lens and at least one contact part, providing an active margin for the next pressure and reset action of the spherical lens, thus ensuring the long-term reliability of the anti-light spill mechanism.

[0016] 3. By setting up attenuation plates and thermopile sensors, and forming a continuous bending structure on the flexible circuit board as a temperature measuring section to detect the internal temperature of the handpiece, the flexible circuit board can calculate the temperature-compensated laser output power value based on the electrical signal output by the thermopile sensor and the temperature value detected by the temperature measuring section. This forms a precise monitoring scheme for near-end laser power, providing a reliable data basis for closed-loop feedback control of laser power. It also forms redundant protection with the mechanical anti-light spill mechanism, further improving the safety of the handpiece. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the laser therapy handpiece of the present invention; Figure 2 This is a schematic diagram of the internal structure of the laser therapy handpiece of the present invention; Figure 3 This is a schematic diagram of the contact part and transmission component of the laser therapy handpiece of the present invention; Figure 4 This is a side sectional view of the laser therapy handpiece of the present invention; Figure 5 This is a schematic diagram of the circuit structure of the laser therapy handpiece attenuator and thermopile sensor of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 in the embodiments of the present invention based on the specific circumstances.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, 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 the embodiments of the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided, but those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] like Figure 1-4 As shown, the laser therapy handpiece of the present invention includes a base 1, a laser emission assembly 2, a limiting seat 3, a contact part 4, a transmission component 5, and a light shielding component 6.

[0026] The base 1 is the supporting foundation of the entire internal structure of the handpiece. Its material can be metal or engineering plastic to ensure structural strength and dimensional stability. The base 1 is generally disc-shaped, with a light-transmitting hole 101 at its center. The light-transmitting hole 101 extends through the thickness direction of the base 1 and serves as the optical path channel for the laser beam to be emitted from the laser emitting component 2 to the outside. The shape of the light-transmitting hole 101 can be circular, and its aperture size is adapted to the divergence angle of the laser beam and the size of the emitted light spot required for physiotherapy.

[0027] The laser emission assembly 2 is used to guide the laser beam generated by the laser source into the base 1 and emit it outward through the light transmission hole 101. One end of the laser emission assembly 2 is connected to the external laser source through an optical coupler, and the other end is fixedly installed on the base 1. The emission end face of the laser emission assembly 2 is aligned with the light transmission hole 101, so that the laser beam emitted from the laser emission assembly 2 can pass through the light transmission hole 101 in a preset direction and be emitted towards the other side of the base 1. The laser emission assembly 2 and the base 1 can be fixed by means of threaded connection, snap-fit ​​or screw fastening to ensure the stability and reliability of the optical path alignment.

[0028] The limiting seat 3 is fixedly connected to the base 1 and is specifically located on one side of the laser beam emission direction. The limiting seat 3 has a concave receiving cavity, the cross-sectional shape of which is approximately spherical or an arcuate surface adapted to the shape of the spherical lens 7. The spherical lens 7 is housed within this receiving cavity and can roll freely within the limiting seat 3, meaning that the spherical lens 7 can perform multi-degree-of-freedom rotational motion relative to the limiting seat 3 within the receiving cavity. A portion of the spherical lens 7 protrudes from the opening of the limiting seat 3 to the outside of the limiting seat 3, allowing it to directly contact the user's skin surface during use. The portion of the spherical lens 7 located inside the limiting seat 3 faces the light emission direction of the light-transmitting hole 101, enabling the laser beam emitted from the light-transmitting hole 101 to directly irradiate the spherical lens 7 and be output to the outside through the refraction and / or transmission of the spherical lens 7.

[0029] Multiple contact portions 4 are distributed at the contact points between the limiting seat 3 and the spherical lens 7, i.e., on the inner wall surface of the cavity of the limiting seat 3. These contact portions 4 are spaced apart from each other circumferentially around the spherical lens 7, forming multi-point support for the spherical lens 7. The function of the contact portions 4 is to define the position of the spherical lens 7 within the limiting seat 3, while allowing the spherical lens 7 to undergo slight displacement relative to the limiting seat 3 when subjected to external force, such as contact with the user's skin and pressure. The number of contact portions 4 can be selected according to the size of the handpiece and the force requirements, for example, three, four, or more, and they are arranged at equal intervals. In actual production, the base 1, the limiting seat 2, and the contact portions 4 can be integrally injection molded.

[0030] The transmission member 5 is disposed between two adjacent contact portions 4. The transmission member 5 is configured such that when the spherical lens 7 is subjected to an external force in the direction of the base 1, the spherical lens 7 displaces relative to the limiting seat 3, thereby contacting the transmission member 5 located between the two adjacent contact portions 4 and pushing the transmission member 5 to displace it. The initial position of the transmission member 5, that is, the position when it is not subjected to external force, extends into the displacement path of the spherical lens 7, thereby ensuring that the spherical lens 7 can reliably drive the transmission member 5 to move when it is pressed.

[0031] The light-shielding member 6 is movably mounted on the base 1 and can switch between a first position that blocks the light-transmitting hole 101 and a second position that opens the light-transmitting hole 101. When the light-shielding member 6 is in the first position, the light-shielding member 6 covers the light-transmitting hole 101 or extends into the light path of the light-transmitting hole 101, blocking the laser beam from being emitted outward through the light-transmitting hole 101. When the light-shielding member 6 is in the second position, the light-shielding member 6 moves away from the light-transmitting hole 101, the light-transmitting hole 101 is fully open, and the laser beam can pass freely.

[0032] The transmission component 5 and the light-shielding component 6 are connected by a transmission mechanism, meaning that the displacement of the transmission component 5 can be transmitted to the light-shielding component 6, driving the light-shielding component 6 to produce corresponding actions. Specifically, when the spherical lens 7 is pressed and pushes the transmission component 5, the transmission component 5 drives the light-shielding component 6 to move from the first position of blocking the light-transmitting hole 101 to the second position of opening the light-transmitting hole 101. When the external force is removed, the light-shielding component 6 automatically returns to the first position, and at the same time, it drives the transmission component 5 to return to the initial position through the transmission connection.

[0033] It should be noted that the light-shielding member 6 can be configured with an automatic return function. When the external force applied to the spherical lens 7 is removed, the light-shielding member 6 can automatically return from the second position to the first position. This automatic return function can be achieved through the elastic force of the elastic reset member, the elastic return force of the transmission member 5 itself, or other reset mechanisms. In addition to the automatic return function, a separate drive component can also be provided. The transmission member 5 can be used as a pressure switch to control the drive component to move the light-shielding member 6. In this embodiment, the specific transmission method is not limited.

[0034] In actual use, when the laser therapy handpiece is not in operation, i.e., not in contact with the user's skin, the light-shielding component 6 is in the first position, blocking the light-transmitting hole 101. The laser beam is physically blocked and will not irradiate the spherical lens 7. When the operator brings the handpiece close to the user's skin, the spherical lens 7 contacts the skin and is subjected to pressure towards the base 1. The spherical lens 7 undergoes a slight displacement within the limiting seat 3, pushing the transmission component 5 to move, or applying a certain pressure to the transmission component 5, thereby driving the light-shielding component 6 to switch from the first position to the second position. The light-transmitting hole 101 is opened, and the laser beam irradiates the spherical lens 7 through the light-transmitting hole 101, and is output to the user's skin surface through the spherical lens 7, achieving the therapy irradiation. When the therapy ends and the operator removes the handpiece from the user's skin, the external force applied to the spherical lens 7 disappears, the light-shielding component 6 returns to the first position, blocking the light-transmitting hole 101 again, and the laser emission path is physically blocked. Thus, the handpiece achieves a purely mechanical safety protection function of emitting light upon contact and extinguishing light upon removal. The entire safety protection process does not rely on any electronic sensors, circuits, or software control, and has extremely high reliability and response speed.

[0035] In some embodiments, the transmission component 5 is an elastic sheet, which can be made of a metal or plastic material with good elasticity and fatigue resistance, such as a thin stainless steel sheet. One end of the transmission component 5 is fixed to the inner wall of the limiting seat 3. The fixing method can be welding, riveting, screw tightening, or insert injection molding, etc., to ensure that the fixed end will not loosen during repeated stress. The other end of the transmission component 5 is connected to the light shield 6. The connection method can be snap-fit, welding, or integral molding.

[0036] When the transmission component 5 is not subjected to external force, it remains in its initial position, at which point the light-shielding component 6 is in the first position blocking the light-transmitting hole 101. When the spherical lens 7 contacts the user's skin and is subjected to pressure towards the base 1, the spherical lens 7 undergoes a slight displacement within the limiting seat 3, contacting and pushing the transmission component 5, causing it to elastically deform. The deformation of the transmission component 5 causes the light-shielding component 6 connected to it to move from the first position to the second position, thus opening the light-transmitting hole 101. When the handpiece leaves the user's skin, the external force applied to the spherical lens 7 is removed, and the transmission component 5 returns to its original shape using its stored elastic potential energy, simultaneously causing the light-shielding component 6 to return from the second position to the first position, blocking the light-transmitting hole 101 again.

[0037] In some embodiments, the contact portion 4 is an arc-shaped protrusion formed on the inner wall of the limiting seat 3. The arc-shaped protrusion can be integrally formed with the limiting seat 3, or it can be separately processed and then embedded in the inner wall of the limiting seat 3. A receiving space is formed between two adjacent contact portions 4. The receiving space is used to receive at least a part of the transmission member 5, so that the transmission member 5 can move within the receiving space.

[0038] When the spherical lens 7 is not subjected to external force, it is in a natural state within the limiting seat 3. At this time, there is an active gap between the spherical lens 7 and at least one contact part 4. This active gap provides displacement margin for the next pressure action of the spherical lens 7. When the spherical lens 7 contacts the user's skin and is subjected to pressure in the direction of the base 1, the spherical lens 7 is displaced within the limiting seat 3 until the surface of the spherical lens 7 contacts all the contact parts 4 simultaneously, forming line contact. The line contact method makes the force between the spherical lens 7 and each contact part 4 more uniform, avoiding local stress concentration that could lead to premature wear of the contact parts 4 or the spherical lens 7. At the same time, during the pressure displacement process, the spherical lens 7 pushes the transmission member 5, which is arranged in the accommodating space between adjacent contact parts 4, to realize the transmission action.

[0039] In addition, since the contact surface of the arc-shaped protrusion is an arc surface, it forms a smooth contact with the spherical surface of the spherical lens 7. The friction is small when the spherical lens 7 rolls, which is conducive to the free rolling of the spherical lens 7 within the limiting seat 3, and also makes it easier for the operator to slide the hand tool on the user's skin surface.

[0040] In some embodiments, the laser therapy handpiece also includes a spherical handheld housing 8. The handheld housing 8 is spherical or near-spherical in shape, making it easy for the user to hold and operate it by embracing it with their palm. Compared to the traditional long handle, the spherical handheld housing 8 fits the natural curvature of the palm better, resulting in more even force distribution when sliding on the skin surface and better operating comfort.

[0041] Both the base 1 and the limiting seat 3 are fixedly installed inside the handheld housing 8. The handheld housing 8 has a window corresponding to the opening of the limiting seat 3. A portion of the spherical lens 7 protrudes from the outside of the handheld housing 8 through this window for contact with the user's skin during use. The spherical lens 7 can roll freely within the limiting seat 3 relative to the handheld housing 8. That is, the handheld housing 8 itself does not restrict the rotational movement of the spherical lens 7. When the operator holds the handheld housing 8 and moves it on the skin surface, the spherical lens 7 rolls within the limiting seat 3 with the undulations and direction of movement of the skin surface, always maintaining good contact with the skin, which helps to ensure the continuity and uniformity of laser irradiation.

[0042] In addition, the handheld shell 8 can adopt a left-right split structure, which can be connected and closed by buckles or screws to facilitate the assembly of internal components. The handheld shell 8 can be made of ABS engineering plastic or medical grade plastic, and the surface can be frosted or anti-slip to increase grip friction and prevent slippage during operation.

[0043] In some embodiments, the laser therapy handpiece also includes a flexible circuit board 9, which is disposed inside the handpiece housing 8. During the manufacturing process, the inner wall of the handpiece housing 8 and the outer wall of the limiting seat 3 are not completely fitted together, but there is a certain assembly gap. This assembly gap is an annular or partially arc-shaped space. The flexible circuit board 9 is arranged in this assembly gap and at least partially surrounds the outer wall of the limiting seat 3. In a specific example, the flexible circuit board 9 is semi-circularly wrapped around the outer side of the limiting seat 3 and is provided with at least three connecting segments. The first connecting end is connected to the infrared imaging probe 10, the second connecting end is connected to the vibrator provided on the other side of the limiting seat 3, and the vibrator is used to prompt the operator through vibration. The third connecting end is used for data transmission or power supply.

[0044] Since both the handheld housing 8 and the limiting seat 3 are spherical or near-spherical structures with limited and irregular internal space, a flexible circuit board 9 is used instead of a rigid printed circuit board to better adapt to the curved assembly space inside the spherical handpiece. The flexible circuit board 9 can be bent or rolled according to the actual shape of the assembly gap and fits between the outer wall of the limiting seat 3 and the inner wall of the handheld housing 8 without taking up extra space or affecting the normal operation of the base 1, the limiting seat 3, and the spherical lens 7 and other optical and mechanical structures.

[0045] The flexible circuit board 9 integrates electronic components such as signal processing circuits, amplification circuits, filtering circuits, and microcontrollers, which are used to realize the acquisition and processing of signals from various sensors inside the handpiece and communication with external host devices.

[0046] In some embodiments, the device further includes an infrared imaging probe 10 and a visible light camera 11. The infrared imaging probe 10 is disposed on the handheld housing 8, specifically embedded in an opening or window near the exposed position of the spherical lens 7, so that its field of view can cover the skin area in front of the handpiece. An extension handle 21 is provided on the laser emitting assembly 2, extending outward from the body of the laser emitting assembly 2. The visible light camera 11 is mounted and fixed at the end of the extension handle 21. The extension handle 21 allows the visible light camera 11 to avoid being blocked by the spherical lens 7 and obtain a wider shooting angle.

[0047] Both the infrared imaging probe 10 and the visible light camera 11 are electrically connected to the flexible circuit board 9 via wires or ribbon cables. The circuits on the flexible circuit board 9 supply power to them and receive the image data they acquire.

[0048] During the use of the laser therapy handpiece, as it moves across the skin surface, the infrared imaging probe 10 and the visible light camera 11 remain directly facing the user's skin. The infrared imaging probe 10 acquires images of the thermal distribution on the skin surface, which can be used to assess changes in skin temperature and the distribution of thermal effects during the therapy. The visible light camera 11 acquires visible light images of the skin surface, which can be used to record the skin's appearance and compare it before and after therapy. The two complement each other, providing multimodal image data for judging skin condition and therapy effectiveness.

[0049] In a specific embodiment, an infrared imaging probe 10 and a visible light camera 11 synchronously acquire image sequences. The visible light image sequences are used to estimate the motion vector of the handpiece. Based on the motion vector, an infrared temperature distribution panoramic image and a visible light morphology panoramic image are generated by stitching them together. Then, a mapping relationship between temperature data points and skin morphology coordinates is established through pixel-level spatial alignment. Finally, a temperature distribution matrix and skin texture feature parameters are output, thereby obtaining complete temperature distribution information of the working area covered by the sliding trajectory. The temperature information and skin surface morphology information are accurately correlated in space, thereby realizing multi-dimensional synchronous monitoring of the laser physiotherapy sliding treatment process.

[0050] like Figure 5 As shown, in some embodiments, an attenuator 12 and a thermopile sensor 13 are also provided for near-end precise monitoring of the laser output power. The attenuator 12 is disposed between the laser emitting assembly 2 and the thermopile sensor 13. Specifically, the attenuator 12 can be fixed on the base 1 or at the emitting end face of the laser emitting assembly 2, and at least partially aligned with the light-transmitting aperture 101. When the laser beam is emitted from the laser emitting assembly 2, a portion of the beam passes directly through the light-transmitting aperture 101 and is directed to the spherical lens 7 to form a therapeutic light path; another small portion of the beam is attenuated by the attenuator 12 and then projected onto the receiving surface of the thermopile sensor 13 with a lower and more stable light intensity. The function of the attenuator 12 is to reduce the intensity of the laser beam to within the linear operating range of the thermopile sensor 13, preventing sensor saturation or damage.

[0051] The thermopile sensor 13 is electrically connected to the flexible circuit board 9 and is used to convert the received optical signal into a thermoelectric electromotive force (EMF), and output the electrical signal to the signal processing circuit on the flexible circuit board 9. The output EMF of the thermopile sensor 13 is positively correlated with the received laser power, so the laser output power can be indirectly obtained by measuring the EMF.

[0052] To eliminate the influence of ambient temperature changes on the output signal of the thermopile sensor 13, a continuous curved structure is also provided on the flexible circuit board 9. This continuous curved structure is formed by the copper foil traces of the flexible circuit board 9 arranged in a serpentine or multi-fold line pattern, located on the flexible circuit board 9 near the cold end of the thermopile sensor 13 or near the inner wall of the handheld housing 8. Since the resistance value of the copper foil has a stable correlation with temperature changes, this continuous curved structure can serve as a temperature measuring section for detecting the real-time temperature inside the handheld housing 8.

[0053] The microcontroller or signal processing circuit on the flexible circuit board 9 is configured to perform the following calculation: receive the electrical signal output from the thermopile sensor 13 and the temperature value detected by the temperature measuring segment; and calculate the temperature-compensated laser output power value based on pre-calibrated temperature drift model parameters, including thermopile sensitivity, temperature drift coefficient, and zero-point drift value at the reference temperature. Therefore, even if the internal temperature of the handpiece changes during physiotherapy due to continuous laser emission or skin heat conduction, accurate laser power monitoring results can still be obtained, providing a reliable data basis for the closed-loop feedback control of the laser source by the external device host.

[0054] Specifically, when the laser fiber outputs laser light, it passes through an attenuator and reaches the thermopile sensor, generating a thermoelectric electromotive force.

[0055] Using a differential amplifier circuit The thermoelectric potential is amplified, and then filtered using a second-order Butterworth low-pass filter at the back end. To reduce errors caused by ambient temperature, a calibration model needs to be designed in the software, as follows: Based on the output electromotive force of the thermopile Where S is the sensitivity of the thermopile. Temperature of the laser-irradiated surface. Cold end temperature ≈ ambient temperature , This refers to temperature-dependent zero-point drift.

[0056] Based on the above description, the temperature-related zero-point drift needs to be calibrated: in, Drift voltage increases by 1°C. This refers to the zero-point drift at 25°C.

[0057] Laser power P and Proportional: Therefore, the voltage was measured: The power value can be calculated by reverse calculation based on the above: In some embodiments, the light-shielding member 6 is slidably and translationally disposed on the base 1. Specifically, a groove or guide rail may be provided on the base 1, and a slider or guide flange is correspondingly provided on the light-shielding member 6. The two cooperate to enable the light-shielding member 6 to slide linearly between a first position and a second position along the surface of the base 1. When the light-shielding member 6 slides to the first position, the blocking part of the light-shielding member 6 covers the light-transmitting hole 101. When the light-shielding member 6 slides to the second position, the blocking part of the light-shielding member 6 moves away from the light-transmitting hole 101.

[0058] The transmission component 5 is connected to the light-shielding component 6. The transmission component 5 receives the driving force generated when the spherical lens 7 is pressed, and drives the light-shielding component 6 to move linearly along the surface of the base 1 by pushing and pulling. The sliding translational movement of the light-shielding component 6 has a simple structure, reliable operation, and a clear sliding trajectory, which facilitates effective blocking and clearance of the light-transmitting hole 101 within a limited space.

[0059] In some embodiments, there are two transmission members 5, which are arranged symmetrically on both sides of the spherical lens 7 or on both sides of the light-transmitting hole 101, with the symmetrical center plane passing through the central axis of the light-transmitting hole 101. Correspondingly, there are also two light-shielding members 6, which are respectively disposed at the ends of the two transmission members 5, that is, each transmission member 5 drives one light-shielding member 6.

[0060] When the spherical lens 7 is not under pressure and the handpiece is not in operation, both light-blocking members 6 are in their respective first positions. The blocking portions of the two light-blocking members 6 move from both sides towards the center, working together to block the light-transmitting hole 101. For example, the edges of the two light-blocking members 6 are joined together or partially overlapped, forming a complete coverage of the light-transmitting hole 101. When the spherical lens 7 is under pressure, the two transmission members 5 are driven, causing the two light-blocking members 6 to move in a direction away from each other to their respective second positions, and the light-transmitting hole 101 is completely opened.

[0061] The structure employing dual transmission components and dual light-blocking components arranged symmetrically ensures a symmetrical distribution of the driving force for the light-blocking action, resulting in smoother movement of the light-blocking component 6 and avoiding the off-center load and jamming problems that may occur with unilateral drive. Simultaneously, the method of having both light-blocking components 6 jointly block the light-transmitting hole 101 halves the required travel distance of a single light-blocking component 6, facilitating rapid response and reliable shading within the limited space of the spherical hand.

[0062] The laser therapy device of the present invention includes a main unit and the aforementioned laser therapy handpiece. The main unit and the laser therapy handpiece are communicatively connected. A laser light source is provided on the main unit, and the laser emission component 2 of the laser therapy handpiece is optically connected to the laser light source.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser physiotherapy handpiece, characterized in that, It includes a base (1), a laser emission assembly (2), a limiting seat (3), a contact part (4), a transmission component (5), and a light-shielding component (6), wherein, A light-transmitting hole (101) is provided on the base (1); One end of the laser emission assembly (2) is connected to a laser source, and the other end is fixed to the base (1) to emit the laser beam outward through the light-transmitting hole (101); The limiting seat (3) is fixed on the base (1). The limiting seat (3) contains a spherical lens (7) that can be rolled inside. A portion of the spherical lens (7) is exposed outside the limiting seat (3), and the portion inside the limiting seat (3) is directly opposite the light-emitting direction of the light-transmitting hole (101). There are multiple contact parts (4) and they are distributed at the positions where the limiting seat (3) contacts the spherical lens (7). The multiple contact parts (4) are arranged at intervals around the spherical lens (7). The transmission component (5) is disposed between two adjacent contact portions (4) and is configured to be pushed by the spherical lens (7) and displaced when the spherical lens (7) is subjected to an external force toward the base (1); The light-shielding member (6) is movably mounted on the base. The light-shielding member (6) has a first position that blocks the light-transmitting hole (101) and a second position that allows the light-transmitting hole (101) to pass through. The light-shielding member (6) is configured to return to the first position when the external force is removed. The transmission component (5) is connected to the light-shielding component (6) so that when the spherical lens (7) is pressed and pushes the transmission component (5), the light-shielding component (6) moves from the first position to the second position.

2. The laser therapy handpiece of claim 1, wherein, The transmission component (5) is an elastic sheet. One end of the transmission component (5) is fixed to the inner wall of the limiting seat (3), and the other end is connected to the light shield (6). When the spherical lens (7) is pressed, the transmission component (5) is pushed by the spherical lens (7) and undergoes elastic deformation, thereby driving the light shield (6) to move from the first position to the second position. When the external force is removed, the transmission component (5) returns to its original state by its own elasticity and drives the light shield (6) to return from the second position to the first position.

3. The laser therapy handpiece as described in claim 1, characterized in that, The contact part (4) is an arc-shaped protrusion formed on the inner wall of the limiting seat (3). A receiving space for accommodating the transmission member (5) is formed between two adjacent contact parts (4). When the spherical lens (7) is pressed, the spherical lens (7) forms a line contact with all contact parts (4). When the external force is removed, there is an active gap between the spherical lens (7) and at least one contact part (4).

4. The laser therapy handpiece as described in claim 1, characterized in that, It also includes a spherical handheld housing (8), the base (1) and the limiting seat (3) are both fixedly disposed inside the handheld housing (8), a portion of the spherical lens (7) protrudes outside the handheld housing (8), and the spherical lens (7) can roll relative to the handheld housing (8) within the limiting seat (3).

5. The laser therapy handpiece as described in claim 4, characterized in that, It also includes a flexible circuit board (9) disposed inside the hand-held housing (8) and located in the assembly gap formed between the inner wall of the hand-held housing (8) and the outer wall of the limiting seat (3), the flexible circuit board (9) being arranged at least partially around the limiting seat (3).

6. The laser therapy handpiece as described in claim 5, characterized in that, It also includes an infrared imaging probe (10) and a visible light camera (11). The infrared imaging probe (10) is mounted on the handheld housing (8). An extension handle (21) is mounted on the laser emission assembly (2). The visible light camera (11) is mounted on the extension handle (21). Both the infrared imaging probe (10) and the visible light camera (11) are electrically connected to the flexible circuit board (9). The infrared imaging probe (10) and the visible light camera (11) are used to face the user's skin during the sliding use of the laser therapy handpiece, thereby collecting skin image data.

7. The laser therapy handpiece as described in claim 5, characterized in that, It also includes an attenuator (12) and a thermopile sensor (13). The attenuator (12) is disposed between the laser emission assembly (2) and the thermopile sensor (13) to attenuate part of the laser beam before projecting it onto the thermopile sensor (13). The thermopile sensor (13) is electrically connected to a flexible circuit board (9). A continuous bending structure is provided on the flexible circuit board (9). The continuous bending structure is used as a temperature measuring section to detect the temperature inside the handheld shell (8). The flexible circuit board (9) is configured to calculate the temperature-compensated laser output power value based on the electrical signal output by the thermopile sensor (13) and the temperature value detected by the temperature measuring section.

8. The laser therapy handpiece as described in claim 1, characterized in that, The light-shielding member (6) is disposed on the base (1) in a slidable and translational manner, and moves linearly along the surface of the base (1) between the first position and the second position.

9. The laser therapy handpiece as described in claim 8, characterized in that, The number of transmission components (5) is two and they are arranged symmetrically. The number of light-shielding components (6) is two and they are respectively arranged at the ends of the two transmission components (5). When the two light-shielding components (6) are in the first position, they cooperate to block the light-transmitting hole (101).

10. A laser therapy device, characterized in that, The device includes a main unit and a laser therapy handpiece as described in any one of claims 1-9. The main unit and the laser therapy handpiece are communicatively connected. The main unit is provided with a laser light source. The laser emission component (2) of the laser therapy handpiece is optically connected to the laser light source.

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