Self-guided ultrasonic treatment head and ultrasonic treatment handpiece

Abstract

The application relates to a self-guiding ultrasonic treatment head and an ultrasonic treatment hand tool, and belongs to the technical field of medical devices. The self-guiding ultrasonic treatment head comprises a treatment head shell, a sound-transmitting film, a moving shaft, a transducing assembly, a first sealing sleeve, a second sealing sleeve and a deflection force generating structure. The sound-transmitting film covers a sound-transmitting port of the treatment head shell. One end of the moving shaft is movably inserted into the treatment head shell. The transducing assembly comprises a mounting bracket and a transducer. A first limiting surface is formed in the treatment head shell. The deflection force generating structure deflects the mounting bracket. A first guiding protrusion of the mounting bracket always abuts against the first limiting surface. The self-guiding ultrasonic treatment head and the ultrasonic treatment hand tool provided by the application deflect the mounting bracket to the first limiting surface through the deflection force generating structure. The first guiding protrusion always abuts against the first limiting surface, which improves the straightness of the movement of the transducing assembly and does not excessively hinder the movement of the transducing assembly, thereby preventing the transducing assembly from being stuck or locked.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a self-guided ultrasound therapy head and an ultrasound therapy handpiece. Background Technology

[0002] Ultrasound is a high-frequency mechanical wave with focusable properties, tissue penetration, and energy deposition. Ultrasound therapy equipment utilizes a focused ultrasound transducer to focus ultrasound waves onto a living organism. The interaction between the ultrasound waves and biological tissue produces thermal, cavitation, and mechanical effects, thus exerting corresponding biological effects. Ultrasound therapy equipment typically includes a handpiece and a main unit. The handpiece consists of a handle and a treatment head, which are detachably connected. The transducer in the treatment head emits ultrasound waves to act on the skin.

[0003] The ultrasound waves emitted by the transducer are point-like. To increase the radiation area of ​​the ultrasound waves, some ultrasound therapy devices make the transducer movable, driven by a drive shaft to move the transducer in a linear motion. However, the transducer is prone to deflection during linear motion, which can lead to problems with the ultrasound waves not hitting the correct points.

[0004] To reduce the possibility of transducer deflection during linear motion, as described in publications CN223143986U, CN216603843U, CN222641108U, and CN105050660A, existing technologies typically add guide shafts to the transducer or transducer assembly to limit deflection. However, adding guide shafts also introduces additional problems. On the one hand, if the gap between the guide shaft and the corresponding through hole is too small, the transducer is prone to jamming or even locking during movement; if the gap is too large, the transducer's deflection will still be significant. On the other hand, the newly added guide shaft needs to ensure its parallelism with the drive shaft, requiring high positional accuracy and presenting significant assembly challenges. Summary of the Invention

[0005] Therefore, it is necessary to provide a self-guided ultrasound therapy head and an ultrasound therapy handpiece to solve the technical problem in the prior art where the transducer of the ultrasound therapy handpiece is easily deflected, resulting in non-straight ultrasound dots.

[0006] Therefore, according to one aspect of this application, a self-guided ultrasound therapy head is provided, the self-guided ultrasound therapy head comprising:

[0007] The treatment head shell has a receiving cavity and a sound-transmitting port communicating with the receiving cavity. The receiving cavity contains a sound-conducting liquid. The treatment head shell has a first limiting surface formed in the receiving cavity. The first limiting surface is perpendicular to the plane where the sound-transmitting port is located.

[0008] A sound-permeable membrane is used to seal the sound-permeable opening.

[0009] The movable shaft has one end movably inserted into the treatment head housing, and the other end of the movable shaft is always outside the treatment head housing. The axis of the movable shaft is parallel to the plane where the first limiting surface and the sound transmission port are located, respectively.

[0010] The transducer assembly includes a mounting bracket and a transducer disposed within a receiving cavity. The mounting bracket is fixed on a movable shaft, and the transducer is disposed on the end face of the mounting bracket facing the sound transmission port. A first guide protrusion is provided on the side of the mounting bracket facing the first limiting surface.

[0011] The first sealing sleeve and the second sealing sleeve are respectively disposed on both sides of the mounting bracket along the axial direction of the moving shaft. The first sealing sleeve and the second sealing sleeve are used to isolate the sound-conducting liquid.

[0012] The deflection force generating structure is used to continuously transmit deflection force to the mounting bracket, thereby causing the mounting bracket to deflect toward the first limiting surface, and the first guide protrusion always presses against the first limiting surface.

[0013] Optionally, the deflection force generating structure consists of a first sealing sleeve and a second sealing sleeve that are twisted and connected to the moving shaft. During the movement of the mounting bracket, the twisted first and second sealing sleeves continuously apply a torsional force to the moving shaft, which in turn causes the mounting bracket to deflect.

[0014] Optionally, the deflection force generating structure includes a first hook, a second hook, and a tension spring. The first hook is disposed on the side of the mounting bracket facing the first limiting surface, and the second hook is disposed on the treatment head housing of the mounting bracket facing the first limiting surface. The tension spring connects the first hook and the second hook. During the movement of the mounting bracket, the tension spring continuously applies tension to the mounting bracket.

[0015] Optionally, the deflection force generating structure includes a first magnetic element and a second magnetic element. The first magnetic element is disposed on the treatment head housing on the side of the mounting bracket away from the first limiting surface and extends along the axial direction of the moving shaft. The second magnetic element is disposed on the side of the mounting bracket away from the first limiting surface. During the movement of the mounting bracket, the first magnetic element continuously applies a repulsive force to the second magnetic element.

[0016] Optionally, the positive pressure between the first guide protrusion and the first limiting surface is 0.0294N to 3.92N.

[0017] Optionally, the first guide protrusion may be hemispherical or semi-cylindrical.

[0018] Optionally, a circular hole is provided on the side of the mounting bracket facing the first limiting surface, and a ball is rotatably protruding from the circular hole, forming a first guide protrusion. The ball is made of ceramic.

[0019] Optionally, the mounting bracket is provided with multiple liquid channels, which extend through the mounting bracket along the axial direction of the moving shaft.

[0020] Optionally, the movable shaft is hollow and includes an arc-shaped cylinder and a cylindrical cylinder connected together. The arc-shaped cylinder and the cylindrical cylinder are coaxially arranged, and the mounting bracket is fixed to the cylindrical cylinder. The self-guided ultrasound treatment head also includes:

[0021] The first mounting base is sealed in the assembly hole of the treatment head housing. The two ends of the first sealing sleeve are respectively sealed and sleeved on the first mounting base and the cylindrical body. The end face of the first mounting base inside the first sealing sleeve is provided with a mounting post. The first mounting base is provided with an arc-shaped relief groove that adapts to the arc-shaped body. The mounting post and the arc-shaped relief groove are coaxially arranged.

[0022] The second mounting base is disposed in the receiving cavity and fixed to the treatment head shell. The two ends of the second sealing sleeve are respectively sealed and fitted onto the second mounting base and the cylindrical body. The end face of the second mounting base inside the second sealing sleeve is provided with a mounting hole, and the mounting hole and the mounting column are coaxially arranged.

[0023] The guide rod is hollow, with one end sealed and fitted onto the mounting post, and the other end sealed and inserted into the mounting hole.

[0024] A sliding cylinder is slidably fitted onto a guide rod, and a cylindrical body is fixedly fitted onto the sliding cylinder. A gas channel is provided on the inner circumferential surface of the cylindrical body, and the gas channel connects the first sealing sleeve and the second sealing sleeve.

[0025] Optionally, the treatment head housing also has a second limiting surface formed within the receiving cavity. The first limiting surface and the second limiting surface are located on opposite sides of the mounting bracket, and the first limiting surface and the second limiting surface are parallel. A second guide protrusion is provided on the side of the mounting bracket facing the second limiting surface.

[0026] According to another aspect of this application, an ultrasonic therapy handpiece is provided, which includes an ultrasonic therapy handle and a self-guided ultrasonic therapy head as described above. The ultrasonic therapy handle includes a handle housing, and the treatment head housing is detachably connected to the handle housing. A linear drive mechanism is provided inside the handle housing, and the output end of the linear drive mechanism is detachably connected to a moving shaft.

[0027] Compared with the prior art, the beneficial effects of the self-guided ultrasound therapy head and ultrasound therapy handpiece provided in this application are as follows:

[0028] On the one hand, the self-guided ultrasonic treatment head of the ultrasonic treatment handpiece includes a first limiting surface and a deflection force generating structure disposed within the treatment head housing. The deflection force generating structure causes the mounting bracket of the transducer assembly to deflect toward the first limiting surface. When the mounting bracket moves, the first guide protrusion of the mounting bracket continuously presses against the first limiting surface, that is, the mounting bracket always moves against the first limiting surface, which improves the straightness of the mounting bracket during movement, thereby improving the straightness of the transducer of the ultrasonic treatment instrument, thus ensuring the therapeutic and cosmetic effect of the ultrasonic treatment handpiece.

[0029] On the other hand, compared with the existing technology that adds an additional guide structure, the treatment head shell directly forms the first limiting surface in the receiving cavity. This not only avoids the installation error caused by adding an additional guide structure and improves the guiding accuracy of the transducer's linear motion, but also reduces the number of parts in the self-guided ultrasound treatment head, lowers production costs, and reduces the assembly difficulty and workload of the self-guided ultrasound treatment head and ultrasound treatment handpiece.

[0030] On the other hand, a first guide protrusion is provided on the side of the mounting bracket to abut against the first limiting surface. The contact area between the first guide protrusion and the first limiting surface is small, that is, the friction between the mounting bracket and the first limiting surface is small. This allows the first limiting surface to improve the straightness of the transducer component during movement without excessively hindering the movement of the transducer component, effectively reducing the possibility of the transducer component getting stuck or locked. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A three-dimensional structural schematic diagram of the ultrasonic therapy handpiece provided in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the self-guided ultrasound therapy head of this application. Figure 1 ;

[0034] Figure 3 This is a schematic diagram of the internal structure of Embodiment 1 of the self-guided ultrasound therapy head of this application. Figure 2 ;

[0035] Figure 4 This is a schematic cross-sectional view of Embodiment 1 of the self-guided ultrasound therapy head of this application;

[0036] Figure 5This is an exploded structural diagram of the internal components of Embodiment 1 of the self-guided ultrasound therapy head of this application;

[0037] Figure 6 This is a three-dimensional structural diagram of the internal components of Embodiment 2 of the self-guided ultrasound therapy head of this application;

[0038] Figure 7 This is a three-dimensional structural diagram of the internal structure of the self-guided ultrasound therapy head embodiment 3 of this application;

[0039] Figure 8 An image showing the effect of ultrasonic dotting when the transducer of an existing ultrasonic therapy handpiece deflects.

[0040] Figure 9 The image shows the ultrasonic dot application effect of the ultrasonic treatment handpiece using the self-guided ultrasonic treatment head of Embodiment 1 of this application.

[0041] Figure 10 The image shows the ultrasonic dot application effect of the ultrasonic treatment handpiece in Embodiment 2 of the self-guided ultrasonic treatment head of this application.

[0042] Figure 11 This is a diagram showing the ultrasonic dotting effect of the ultrasonic treatment handpiece using the self-guided ultrasonic treatment head of Embodiment 3 of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Treatment head shell; 110. Receiving cavity; 111. First chamber; 112. Second chamber; 120. Sound transmission port; 130. First limiting surface; 140. Second limiting surface;

[0045] 2. Acoustic membrane;

[0046] 3. Moving shaft; 310. Arc-shaped cylinder; 320. Cylindrical cylinder; 321. Gas passage;

[0047] 4. Transducer assembly; 410. Mounting bracket; 411. Liquid channel; 420. Transducer; 430. First guide protrusion; 440. Second guide protrusion; 450. Ball bearing;

[0048] 5. First sealing sleeve; 6. Second sealing sleeve; 7. First hook; 8. Second hook; 9. Tension spring; 10. First magnetic component; 11. Second magnetic component;

[0049] 12. First mounting base; 1210. Mounting post; 1220. Arc-shaped clearance groove;

[0050] 13. Second mounting base; 1310. Mounting hole;

[0051] 14. Guide rod; 15. Slide cylinder; 16. Partition plate; 17. Circuit board;

[0052] 100. Self-guided ultrasound therapy head; 200. Ultrasonic therapy handpiece;

[0053] 1000. Ultrasonic therapy handpiece. Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0055] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0056] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this application 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 this application.

[0057] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] Ultrasound therapy equipment:

[0059] According to one aspect of this application, an embodiment of this application provides an ultrasound therapy device, which includes a main unit and an ultrasound therapy handpiece, the main unit and the ultrasound therapy handpiece being electrically connected, the main unit supplying power to the ultrasound therapy handpiece and controlling the power of the ultrasound therapy handpiece.

[0060] Ultrasound therapy handpieces:

[0061] According to another aspect of this application, please refer to [the relevant document / reference]. Figures 1 to 7The present application provides an ultrasonic therapy handpiece 1000, which includes an ultrasonic therapy handle 200 and a self-guided ultrasonic therapy head 100. The ultrasonic therapy handle 200 includes a handle housing. The treatment head housing 1 of the self-guided ultrasonic therapy head 100 is detachably connected to the handle housing. A linear drive mechanism is provided inside the handle housing. The self-guided ultrasonic therapy head 100 is provided with a moving shaft 3. The output end of the linear drive mechanism is detachably connected to the moving shaft 3.

[0062] Self-guided ultrasound therapy head:

[0063] Example 1

[0064] According to another aspect of this application, please refer to [the relevant document / reference]. Figures 2 to 5 This application provides a self-guided ultrasound treatment head 100, which includes a treatment head housing 1, an acoustic membrane 2, a moving shaft 3, a transducer assembly 4, a first sealing sleeve 5, and a second sealing sleeve 6.

[0065] The treatment head housing 1 has a receiving cavity 110 and a sound-transmitting port 120 communicating with the receiving cavity 110. The receiving cavity 110 contains a sound-conducting liquid. The treatment head housing 1 has a first limiting surface 130 formed within the receiving cavity 110. The first limiting surface 130 is perpendicular to the plane where the sound-transmitting port 120 is located. A sound-transmitting membrane 2 covers the sound-transmitting port 120. One end of a movable shaft 3 is movably inserted into the treatment head housing 1, and the other end of the movable shaft 3 is always outside the treatment head housing 1. The axis of the movable shaft 3 is parallel to the planes where the first limiting surface 130 and the sound-transmitting port 120 are located, respectively.

[0066] Preferably, the treatment head shell 1 (including its internal first limiting surface 130) is injection molded, which is simple to manufacture and has low production cost.

[0067] The transducer assembly 4 includes a mounting bracket 410 and a transducer 420 disposed in the receiving cavity 110. The mounting bracket 410 is fixed on the moving shaft 3, and the transducer 420 is disposed on the end face of the mounting bracket 410 facing the sound transmission port 120. A first guide protrusion 430 is provided on the side of the mounting bracket 410 facing the first limiting surface 130.

[0068] Please see Figure 4 For the fixed connection between the movable shaft 3 and the mounting bracket 410, the mounting bracket 410 has an assembly hole that fits the movable shaft 3, and the mounting bracket 410 is fitted onto the movable shaft 3. The movable shaft 3 and the mounting bracket 410 are respectively provided with corresponding screw holes. Screws are simultaneously screwed into both screw holes, thereby achieving the fixed connection between the movable shaft 3 and the mounting bracket 410. The movable shaft 3 and the mounting bracket 410 rotate together or move linearly together.

[0069] It is understandable that the movable shaft 3 and the mounting bracket 410 can also be fixedly connected by means of snap-fit, rivet or welding, and this is not the only limitation.

[0070] The first sealing sleeve 5 and the second sealing sleeve 6 are respectively disposed on both sides of the mounting bracket 410 along the axial direction of the moving shaft 3. The first sealing sleeve 5 and the second sealing sleeve 6 are used to isolate the sound-conducting liquid. The connection between the moving shaft 3 and the treatment head housing 1 is located inside the first sealing sleeve 5, and the end of the moving shaft 3 in the receiving cavity 110 is located inside the second sealing sleeve 6.

[0071] It is understandable that the direction of the axis of the moving axis 3 is the direction of movement of the moving axis 3.

[0072] Before installation, the first sealing sleeve 5 and the second sealing sleeve 6 are pre-twisted. The two ends of the first sealing sleeve 5 in the twisted state are then fixed respectively, and the two ends of the second sealing sleeve 6 in the twisted state are also fixed respectively.

[0073] Specifically, for the sealing installation and fixing of the first sealing sleeve 5, the first end of the first sealing sleeve 5 can be sealed and fixed on the moving shaft 3, or it can be sealed and fixed on the mounting bracket 410; the second end of the first sealing sleeve 5 can be directly sealed and fixed on the treatment head housing 1, or it can be sealed and fixed on the first mounting seat 12 added to the treatment head housing 1 as described below, without making a unique limitation here.

[0074] Similarly, for the sealing installation and fixing of the second sealing sleeve 6, the first end of the second sealing sleeve 6 can be sealed and fixed on the moving shaft 3, or it can be sealed and fixed on the mounting bracket 410; the second end of the second sealing sleeve 6 can be directly sealed and fixed on the treatment head housing 1, or it can be sealed and fixed on the second mounting seat 13 as described below, without making a unique limitation here.

[0075] Preferably, please refer to the following: Figures 2 to 6 The first end of the first sealing sleeve 5 is sealed and fixed on the moving shaft 3, and the second end of the first sealing sleeve 5 is sealed and fixed on the first mounting seat 12, which is attached to the treatment head housing 1 as described below; the first end of the second sealing sleeve 6 is sealed and fixed on the moving shaft 3, and the second end of the second sealing sleeve 6 is sealed and fixed on the second mounting seat 13 as described below.

[0076] Preferably, both the first sealing sleeve 5 and the second sealing sleeve 6 are bellows, which have good expansion and contraction capabilities along their axial direction and provide little resistance to the movement of the moving shaft 3.

[0077] For example: Please refer to the following: Figure 2 , Figure 4 and Figure 5At this point, the transducer assembly 4 in the figure moves to a position close to the second mounting base 13 as described below, the first sealing sleeve 5 is stretched, and the second sealing sleeve 6 is compressed. Please refer to... Figure 6 At this time, the transducer 4 in the figure moves to the center position of the first mounting base 12 and the second mounting base 13 as described below. The first sealing sleeve 5 and the second sealing sleeve 6 are both in the normal state, neither stretched nor compressed.

[0078] With the above configuration, the first sealing sleeve 5 and the second sealing sleeve 6, both in a torsional state, form a deflection force generating structure. During the movement of the mounting bracket 410, the torsional first sealing sleeve 5 and the torsional second sealing sleeve 6 continuously apply a torsional force to the moving shaft 3, causing the moving shaft 3 to rotate. This torsional force is the deflection force that causes the mounting bracket 410 to deflect. Since the mounting bracket 410 is fixed on the moving shaft 3, the moving shaft 3 drives the mounting bracket 410 to rotate together. The mounting bracket 410 deflects towards the first limiting surface 130, eventually causing the first guide protrusion 430 to contact the first limiting surface 130. After the first guide protrusion 430 contacts the first limiting surface 130, the first sealing sleeve 5 and the second sealing sleeve 6 continue to apply a torsional force to the moving shaft 3, ensuring that the first guide protrusion 430 remains pressed against the first limiting surface 130.

[0079] One end of the mounting bracket 410 is fixed to the moving shaft 3, and the transducer 420 is disposed on the end face of the other end of the mounting bracket 410. Thus, the transducer 420 is relatively far from the moving shaft 3, and a small rotation of the moving shaft 3 can cause the transducer 420 to deflect significantly. In fact, even if the first sealing sleeve 5 and the second sealing sleeve 6 do not twist, the distance between the first guide protrusion 430 and the first limiting surface 130 will not be too large. Therefore, a rotation of the moving shaft 3 that is imperceptible to the naked eye is sufficient to meet the deflection requirement of the mounting bracket 410, and the effect of rotating the moving shaft 3 on its linear motion can be considered negligible.

[0080] When the first sealing sleeve 5 and the second sealing sleeve 6 do not twist, the distance between the first guide protrusion 430 and the first limiting surface 130 is in the range of 0.05 mm to 1 mm. More preferably, the distance between the first guide protrusion 430 and the first limiting surface 130 is in the range of 0.05 mm to 0.5 mm.

[0081] On the one hand, the self-guided ultrasonic treatment head 100 of the ultrasonic treatment handpiece 1000 includes a first limiting surface 130 disposed within the treatment head housing 1. The first sealing sleeve 5 and the second sealing sleeve 6, when twisted, together drive the mounting bracket 410 of the transducer assembly 4 to deflect toward the first limiting surface 130. When the mounting bracket 410 moves, the first guide protrusion 430 of the mounting bracket 410 always presses against the first limiting surface 130, that is, the mounting bracket 410 always moves against the first limiting surface 130, which improves the straightness of the mounting bracket 410 during movement, thereby improving the straightness of the ultrasonic treatment transducer 420 in applying pressure, thus ensuring the therapeutic and cosmetic effect of the ultrasonic treatment handpiece 1000.

[0082] On the other hand, compared with the existing technology that adds an additional guide structure, the treatment head housing 1 directly forms the first limiting surface 130 in the receiving cavity 110, which avoids the installation error caused by adding an additional guide structure and improves the guiding accuracy of the linear motion of the transducer 420.

[0083] On the other hand, the first sealing sleeve 5 and the second sealing sleeve 6 are commonly used components of existing ultrasonic treatment heads. In this embodiment 1, there is no need to add an additional guide structure. The deflection guide of the mounting bracket 410 is achieved directly by the torsion of the first sealing sleeve 5 and the second sealing sleeve 6 in conjunction with the first limiting surface 130. This effectively reduces the number of components in the self-guided ultrasonic treatment head 100 of this application, simplifies the structural design of the self-guided ultrasonic treatment head 100, effectively reduces production costs, and effectively reduces the assembly difficulty and workload of the self-guided ultrasonic treatment head 100 and the ultrasonic treatment handpiece 1000.

[0084] On the other hand, a first guide protrusion 430 is provided on the side of the mounting bracket 410 to abut against the first limiting surface 130. The contact area between the first guide protrusion 430 and the first limiting surface 130 is small, that is, the friction between the mounting bracket 410 and the first limiting surface 130 is small. This allows the first limiting surface 130 to improve the straightness of the transducer 4 during movement without excessively hindering the movement of the transducer 4, effectively reducing the possibility of the transducer 4 getting stuck or locked.

[0085] It is understandable that the first limiting surface 130 and the first guide protrusion 430 are always in contact, meaning there is always positive pressure between them. This positive pressure is the pressure perpendicular to the first limiting surface 130. The magnitude of this positive pressure is selected based on actual design requirements. While ensuring that the first guide protrusion 430 does not detach from the first limiting surface 130, the friction between the first guide protrusion 430 and the first limiting surface 130 must also be within acceptable limits and not affect the normal movement of the mounting bracket 410.

[0086] Preferably, the positive pressure between the first limiting surface 130 and the first guide protrusion 430 is 0.0294 N (Newton) to 3.92 N. Under normal temperature, low speed and smooth surface conditions, the coefficient of friction between the first limiting surface 130 and the first guide protrusion 430 is approximately 0.3, and the frictional force between the first guide protrusion 430 and the first limiting surface 130 is 0.00882 N to 1.176 N.

[0087] When the positive pressure between the first limiting surface 130 and the first guide protrusion 430 is in the range of 0.0294N to 3.92N, the mounting bracket 410 is always completely attached to the first limiting surface 130. There will be no situation where the mounting bracket 410 is dislodged from the first limiting surface 130, nor will there be any situation where the mounting bracket 410 is stuck, locked or jumps. This effectively ensures both the straightness and smoothness of the movement of the mounting bracket 410.

[0088] More preferably, the positive pressure between the first limiting surface 130 and the first guide protrusion 430 is 0.0294N to 0.196N. Under normal temperature, low speed and smooth surface conditions, the coefficient of friction between the first limiting surface 130 and the first guide protrusion 430 is approximately 0.3, and the frictional force between the first guide protrusion 430 and the first limiting surface 130 is 0.00882N to 0.0588N.

[0089] It is also understandable that the torsional range of the first sealing sleeve 5 and the second sealing sleeve 6 is related to the weight of the moving shaft 3, the mounting bracket 410, and the transducer 420. The greater the weight of the moving shaft 3, the mounting bracket 410, and the transducer 420, the greater the required torsional range of the first sealing sleeve 5 and the second sealing sleeve 6; conversely, the smaller the weight of the moving shaft 3, the mounting bracket 410, and the transducer 420, the smaller the required torsional range of the first sealing sleeve 5 and the second sealing sleeve 6.

[0090] It should be noted that, as described in the background section, when existing ultrasonic therapy handpieces lack a guide shaft or the gap between the guide shaft and the corresponding through-hole is large, the transducer is prone to deflection during linear movement, leading to inaccurate ultrasonic targeting. Since the transducer is typically mounted at the end of the mounting bracket furthest from the moving axis, even a small deflection angle at the moving axis will result in a relatively large deflection amplitude at the transducer. Please refer to [link to relevant documentation]. Figure 8 , Figure 8 This image shows the ultrasonic dot-effect when the transducer of a conventional ultrasonic therapy handpiece deflects. The handpiece has a guide shaft. Figure 8 It is known that when the transducer of the existing ultrasonic therapy handpiece gets stuck or deflects during movement, if the various points of the ultrasonic acupuncture are connected, the line will be obviously curved, thus there is a clear problem of the ultrasonic acupuncture not being straight.

[0091] Please see Figure 9 , Figure 9 This image shows the ultrasonic acupressure effect of the ultrasonic treatment handpiece 1000 using the self-guided ultrasonic treatment head of Embodiment 1 of this application. Figure 9 It can be seen that if the points of each ultrasonic point made by the ultrasonic treatment handpiece 1000 are connected by a line, the line is approximately a straight line. Therefore, after the ultrasonic treatment handpiece 1000 adopts the self-guided ultrasonic treatment head embodiment 1 of this application, the straightness of the ultrasonic point is significantly improved.

[0092] Please refer to the following: Figure 2 , Figure 5 and Figure 6 The mounting bracket 410 has two first guide protrusions 430 on its side facing the first limiting surface 130, and the two first guide protrusions 430 are spaced apart along the axis of the moving shaft 3.

[0093] With the above configuration, two first guide protrusions 430 are spaced apart on the side of the mounting bracket 410 along the axial direction of the moving shaft 3. This ensures that the distance between the front and rear (i.e., front and rear in the moving direction) of this side and the first limiting surface 130 is approximately consistent, so that the mounting bracket 410 presses evenly against the first limiting surface 130. It can be understood that the front and rear of the mounting bracket 410 is along the axial direction of the moving shaft 3.

[0094] The first guide protrusion 430 is hemispherical or semi-cylindrical. The hemispherical shape is similar to a protrusion, with the spherical surface facing the first limiting surface 130. The cylindrical surface of the semi-cylindrical shape faces the first limiting surface 130. After the first limiting surface 130 abuts against the cylindrical surface, the first limiting surface 130 is tangent to the cylindrical surface.

[0095] Alternatively, the first guide protrusion 430 may be irregularly shaped, and the end face of the first guide protrusion 430 that abuts against the first limiting surface 130 is preferably curved to reduce the contact area between the first guide protrusion 430 and the first limiting surface 130. The shape of the first guide protrusion 430 may be selected according to actual design requirements, as long as the contact area between the first guide protrusion 430 and the first limiting surface 130 is minimized, and no single limitation is imposed here.

[0096] Please refer to the following: Figure 2 , Figure 3 , Figure 5 and Figure 6 The mounting bracket 410 has a round hole on its side facing the first limiting surface 130. A ball bearing 450 is provided in the round hole and can be rolled out. The ball bearing 450 forms the first guide protrusion 430.

[0097] When the ball bearing 450 contacts the first limiting surface 130 and the mounting bracket 410 is in motion, the ball bearing 450 rolls in the circular hole. Compared with the first guide protrusion 430, which is a solid structure fixed on the side of the mounting bracket 410, the rolling contact friction between the ball bearing 450 and the first limiting surface 130 is smaller, further reducing the resistance of the first limiting surface 130 to the movement of the mounting bracket 410.

[0098] The 450 ball bearing is made of ceramic, which has the advantages of being lightweight, having a low coefficient of friction, high strength, high temperature resistance, corrosion resistance, and low noise.

[0099] Please refer to the following: Figures 2 to 6 The mounting bracket 410 is provided with multiple liquid channels 411, which pass through the mounting bracket 410 along the axial direction of the moving shaft 3.

[0100] Understandably, when the mounting bracket 410 moves along the axis of the moving shaft 3, the sound-conducting liquid in the receiving cavity 110 will obstruct the mounting bracket 410. However, due to the existence of the liquid channel 411, the sound-conducting liquid at the front end of the moving direction of the mounting bracket 410 can flow from the liquid channel 411 to the rear end of the moving direction of the mounting bracket 410, reducing the obstruction encountered by the mounting bracket 410, reducing the difficulty of moving the mounting bracket 410, and improving the smoothness of the moving direction of the mounting bracket 410.

[0101] For example, please refer to the following: Figures 2 to 6 There are three liquid channels 411, which are arranged along the height direction of the self-guided ultrasound treatment head 100 and are perpendicular to the plane where the sound transmission port 120 is located.

[0102] Please refer to the following: Figures 3 to 5 The movable shaft 3 is hollow and includes an arc-shaped cylinder 310 and a cylindrical cylinder 320 connected together. The arc-shaped cylinder 310 and the cylindrical cylinder 320 are coaxially arranged. The mounting bracket 410 is fixed on the cylindrical cylinder 320. The self-guided ultrasound treatment head 100 also includes a first mounting seat 12, a second mounting seat 13, a guide rod 14 and a slide cylinder 15.

[0103] Please refer to the following: Figures 3 to 5The first mounting base 12 is sealed in the assembly hole of the treatment head housing 1. The two ends of the first sealing sleeve 5 are respectively sealed and fitted onto the first mounting base 12 and the cylindrical body 320. A mounting post 1210 is provided on the end face of the first mounting base 12 inside the first sealing sleeve 5. An arc-shaped clearance groove 1220 adapted to the arc-shaped cylindrical body 310 is provided on the first mounting base 12. The mounting post 1210 and the arc-shaped clearance groove 1220 are coaxially arranged. The second mounting base 13 is disposed within the receiving cavity 110 and fixed to the treatment head housing 1. The two ends of the second sealing sleeve 6 are respectively sealed and fitted onto the second mounting base 13 and the cylindrical body 320. A mounting hole 1310 is provided on the end face of the second mounting base 13 inside the second sealing sleeve 6. The mounting hole 1310 and the mounting post 1210 are coaxially arranged. The guide rod 14 is hollow. One end of the guide rod 14 is sealed and sleeved on the mounting post 1210, and the other end of the guide rod 14 is sealed and inserted into the mounting hole 1310.

[0104] Specifically, a mounting hole is provided on the treatment head housing 1, and the first mounting seat 12 is then sealed and mounted on the mounting hole. The two end faces of the first mounting seat 12 face the outside and inside of the treatment head housing 1, respectively, so that the first mounting seat 12 provides a mounting position for the portion of the moving shaft 3 that penetrates the treatment head housing 1. The other end of the moving shaft 3 does not need to penetrate the treatment head housing 1, so the second mounting seat 13 can be entirely disposed within the receiving cavity 110 and fixed to the inner surface of the treatment head housing 1.

[0105] Preferably, the mounting post 1210 is cylindrical; the guide rod 14 is a cylindrical tube, and the inner cylindrical surface of the guide rod 14 is adapted to the outer cylindrical surface of the mounting post 1210; the mounting hole 1310 is a circular hole, and the inner cylindrical surface of the mounting hole 1310 is adapted to the outer cylindrical surface of the guide rod 14.

[0106] Understandably, in order to ensure that the arc-shaped cylinder 310 moves smoothly in the arc-shaped clearance groove 1220, the arc-shaped clearance groove 1220 is adapted to the arc-shaped cylinder 310, which means that the shape of the arc-shaped clearance groove 1220 is the same as that of the arc-shaped cylinder 310, but the outline of the arc-shaped clearance groove 1220 is slightly larger than that of the arc-shaped cylinder 310.

[0107] Specifically, the first mounting base 12 is detachably mounted on the treatment head housing 1, and the second mounting base 13 is located in the receiving cavity 110 and integrally formed with the treatment head housing 1. When installing the guide rod 14, the first mounting base 12 is first removed from the treatment head housing 1, and one end of the guide rod 14 is first installed on the mounting post 1210 or in the mounting hole 1310. Then the first mounting base 12 is installed on the treatment head housing 1. During the installation of the first mounting base 12, both ends of the guide rod 14 are respectively installed on the mounting post 1210 and the guide hole.

[0108] Alternatively, the first mounting base 12 may have a hole structure, and the second mounting base 13 may have a column structure; or both the first mounting base 12 and the second mounting base 13 may have column structures. Provided that the acoustic fluid in the receiving cavity 110 does not flow out of the treatment head housing 1 through the guide rod 14, the mounting structures of the first mounting base 12, the second mounting base 13, and the guide rod 14 may be selected according to actual needs, and no single limitation is imposed here.

[0109] Please refer to the following: Figures 3 to 5 The slide cylinder 15 is slidably sleeved on the guide rod 14, and the cylindrical body 320 is fixedly sleeved on the slide cylinder 15. A gas channel 321 is provided on the outer circumferential surface of the slide cylinder 15 and / or the inner surface of the cylindrical body 320. The gas channel 321 connects the first sealing sleeve 5 and the second sealing sleeve 6.

[0110] With the above configuration, the first mounting base 12 and the second mounting base 13 provide mounting positions for the guide rod 14. The moving shaft 3 slides on the guide rod 14 through the slide cylinder 15. The guide rod 14 guides the movement of the moving shaft 3 and improves the movement accuracy of the moving shaft 3.

[0111] Understandably, compared to the sliding shaft 3 directly sliding against the guide rod 14, the contact area between the slide cylinder 15 and the guide rod 14 is smaller, resulting in less friction and less resistance to the movement of the sliding shaft 3.

[0112] For example, please refer to Figure 3 Gas channel 321 is provided on the inner surface of cylindrical body 320. Gas channel 321 extends along the axial direction of cylindrical body 320, and both ends of gas channel 321 are connected to the two end faces of cylindrical body 320.

[0113] Specifically, the gas channel 321 of the cylindrical body 320 connects the interior of the first sealing sleeve 5 and the interior of the second sealing sleeve 6. During the movement of the moving shaft 3, the first sealing sleeve 5 and the second sealing sleeve 6 are compressed and stretched respectively, causing a tendency for the air pressure in the first sealing sleeve 5 and the second sealing sleeve 6 to change. This tendency would hinder the movement of the moving shaft 3. However, due to the presence of the gas channel 321, the gas inside the first sealing sleeve 5 and the second sealing sleeve 6 can circulate with each other through the gas channel 321, balancing the air pressure inside the first sealing sleeve 5 and the second sealing sleeve 6, and preventing the air pressure from creating resistance to the movement of the moving shaft 3.

[0114] Multiple gas channels 321 are provided, and the multiple gas channels 321 are evenly arranged along the circumference of the cylindrical body 320.

[0115] The number of gas channels 321 is preferably two, and the two gas channels 321 are symmetrically arranged on the inner circumferential surface of the cylindrical body 320.

[0116] Please refer to the following: Figures 2 to 4 The receiving cavity 110 is sealed and divided into a first chamber 111 and a second chamber 112 by a partition 16. The sound-conducting liquid is disposed in the first chamber 111, and the sound-transmitting port 120 is located at the end of the first chamber 111 away from the second chamber 112. The self-guided ultrasound treatment head 100 also includes a circuit board 17 disposed in the second chamber 112. The circuit board 17 and the transducer 420 are connected by wires (not shown). The wires pass through the partition 16, and the connection between the wires and the partition 16 is sealed.

[0117] Specifically, the circuit board 17 controls the opening and closing of the transducer 420 and its power. The circuit board 17 has a plug-in end that extends out of the treatment head housing 1 and is electrically connected to the ultrasonic treatment handle 200. To facilitate the connection between the self-guided ultrasonic treatment head 100 and the ultrasonic treatment handle 200, the plug-in end and the first mounting base 12 are located on the same side of the treatment head housing 1.

[0118] Please refer to the following: Figure 3 and Figure 5 The treatment head housing 1 also has a second limiting surface 140 formed in the receiving cavity 110. The first limiting surface 130 and the second limiting surface 140 are respectively located on opposite sides of the mounting bracket 410. The first limiting surface 130 and the second limiting surface 140 are parallel. The sound transmission port 120 is centrally located between the first limiting surface 130 and the second limiting surface 140. A second guide protrusion 440 is provided on the side of the mounting bracket 410 facing the second limiting surface 140.

[0119] By setting the second limiting surface 140 as described above, on the one hand, this application sets the first limiting surface 130 and the second limiting surface 140 on opposite sides of the mounting bracket 410 respectively. If the deflection force causes structural failure, the second limiting surface 140 can also play a limiting role. The mounting bracket 410 is restricted between the first limiting surface 130 and the second limiting surface 140. As long as the gap between the mounting bracket 410 and the first limiting surface 130 and the second limiting surface 140 is reasonably limited, the straightness of the mounting bracket 410 during movement can be guaranteed to a certain extent.

[0120] On the other hand, a first limiting surface 130 and a second limiting surface 140 are formed inside the treatment head shell 1. The treatment head shell 1 (including the first limiting surface 130 and the second limiting surface 140 inside it) is injection molded, which is convenient for manufacturing, and the overall weight distribution of the treatment head shell 1 is relatively uniform and symmetrical.

[0121] It is understandable that, since the first guide protrusion 430 and the second guide protrusion 440 have similar functions and adopt the same design concept, the number, shape and structure of the second guide protrusion 440 formed by the ball 450 are the same as those of the first guide protrusion 430, and the second guide protrusion 440 will not be described in detail again.

[0122] Example 2

[0123] Please see Figure 6 The difference between Embodiment 2 and Embodiment 1 is that the first sealing sleeve 5 and the second sealing sleeve 6 are not twisted. The self-guided ultrasonic treatment head 100 also includes a first hook 7, a second hook 8 and a tension spring 9. The first hook 7, the second hook 8 and the tension spring 9 form a deflection force generating structure. The first hook 7 is disposed on the side of the mounting bracket 410 facing the first limiting surface 130. The second hook 8 is disposed on the treatment head housing 1 of the mounting bracket 410 facing the first limiting surface 130. The tension spring 9 connects the first hook 7 and the second hook 8. During the movement of the mounting bracket 410, the tension spring 9 continuously applies a tension force to the mounting bracket 410. This tension force is the deflection force that causes the mounting bracket 410 to deflect towards the first limiting surface 130, and ultimately causes the first guide protrusion 430 to always press against the first limiting surface 130.

[0124] Apart from this difference, the other features of Embodiment 2 are the same as those of Embodiment 1 above, and can also be extended to Embodiment 2, which will not be repeated here.

[0125] Thus, Embodiment 2 provides another deflection force generating structure that causes the mounting bracket 410 to deflect, providing multiple options for structural design.

[0126] On the one hand, in embodiment 2, the deflection force generating structure is formed by the first hook 7, the second hook 8 and the tension spring 9. The tension spring 9 continuously applies tension to the mounting bracket 410, thereby causing the mounting bracket 410 to deflect towards the first limiting surface 130, and ultimately causing the first guide protrusion 430 to always press against the first limiting surface 130. That is, the mounting bracket 410 always moves against the first limiting surface 130, which improves the straightness of the mounting bracket 410 during movement, thereby improving the straightness of the ultrasonic therapy transducer 420 in striking points, thus ensuring the therapeutic and cosmetic effect of the ultrasonic therapy handpiece 1000.

[0127] On the other hand, the tension of the tension spring 9 is applied directly to the side of the mounting bracket 410 facing the first limiting surface 130, and the lever arm is relatively long. Therefore, only a small tension is needed to deflect the mounting bracket 410. Moreover, the tension spring 9 has a stable structure and can continue to apply a stable tension to the mounting bracket 410.

[0128] Please see Figure 10 , Figure 10This image shows the ultrasonic acupressure effect of the ultrasonic treatment handpiece 1000 using the self-guided ultrasonic treatment head of Embodiment 2 of this application. Figure 10 It can be seen that if the points of each ultrasonic point made by the ultrasonic treatment handpiece 1000 are connected by a line, the line is approximately a straight line. Therefore, after the ultrasonic treatment handpiece 1000 adopts the self-guided ultrasonic treatment head embodiment 2 of this application, the straightness of the ultrasonic point is significantly improved.

[0129] Example 3

[0130] Please see Figure 7 The difference between Embodiment 3 and Embodiment 1 is that the first sealing sleeve 5 and the second sealing sleeve 6 are not twisted, and the self-guided ultrasonic treatment head 100 does not have the second guide protrusion 440. The self-guided ultrasonic treatment head 100 also includes a first magnetic element 10 and a second magnetic element 11. The first magnetic element 10 is disposed on the treatment head housing 1 on the side of the mounting bracket 410 away from the first limiting surface 130. The first magnetic element 10 extends along the axial direction of the moving shaft 3. The second magnetic element 11 is disposed on the side of the mounting bracket 410 away from the first limiting surface 130. During the movement of the mounting bracket 410, the first magnetic element 10 continuously applies a repulsive force to the second magnetic element 11. This repulsive force is the deflection force that causes the mounting bracket 410 to deflect towards the first limiting surface 130, and ultimately causes the first guide protrusion 430 to always press against the first limiting surface 130.

[0131] Apart from this difference, the other features of Embodiment 3 are the same as those of Embodiment 1 above, and can also be extended to Embodiment 3, which will not be repeated here.

[0132] Thus, Embodiment 3 provides another deflection force generating structure that causes the mounting bracket 410 to deflect, providing multiple options for structural design.

[0133] On the one hand, in embodiment 3, the first magnetic element 10 and the second magnetic element 11 form a deflection force generating structure. There is always a repulsive force between the first magnetic element 10 and the second magnetic element 11, which causes the mounting bracket 410 with the second magnetic element 11 to deflect towards the first limiting surface 130, and ultimately causes the first guide protrusion 430 to always press against the first limiting surface 130. That is, the mounting bracket 410 always moves against the first limiting surface 130, which improves the straightness of the mounting bracket 410 when it moves, thereby improving the straightness of the ultrasonic therapy transducer 420 in striking points, thus ensuring the therapeutic and cosmetic effect of the ultrasonic therapy handpiece 1000.

[0134] On the other hand, the repulsive forces act on the first magnetic element 10 and the second magnetic element 11 respectively. Since the second magnetic element 11 is disposed on the side of the mounting bracket 410, it can also be regarded as the repulsive force acting on the side of the mounting bracket 410. The lever arm is relatively long, so only a small repulsive force is needed to push the mounting bracket 410 to deflect.

[0135] On the other hand, the repulsive force of the first magnetic element 10 and the second magnetic element 11 is used to push the mounting bracket 410 to deflect. There is no contact between the first magnetic element 10 and the mounting bracket 410, that is, there is no friction between the two, which can effectively reduce the obstruction to the linear movement of the mounting bracket 410.

[0136] Please see Figure 11 , Figure 11 This image shows the ultrasonic acupressure effect of the ultrasonic treatment handpiece 1000 using the self-guided ultrasonic treatment head of Embodiment 3 of this application. Figure 11 It can be seen that if the points of each ultrasonic point made by the ultrasonic treatment handpiece 1000 are connected by a line, the line is approximately a straight line. Therefore, after the ultrasonic treatment handpiece 1000 adopts the self-guided ultrasonic treatment head embodiment 3 of this application, the straightness of the ultrasonic point is significantly improved.

[0137] Preferably, please refer to Figure 7 The first magnetic component 10 is elongated, and the second magnetic component 11 is block-shaped. There are two second magnetic components 11, which are spaced apart on the side of the mounting bracket 410 along the axial direction of the moving shaft 3.

[0138] Preferably, both the first magnetic element 10 and the second magnetic element 11 are permanent magnets. To facilitate control of the deflection of the mounting bracket 410, the first magnetic element 10 can also be an electromagnetic structure.

[0139] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The embodiments described above are merely illustrative of several implementations of this application, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-guiding ultrasound treatment head, characterized in that, The utility model relates to a kind of medical ultrasound treatment device, including: Treatment head shell, with containing cavity and the sound transmission port of intercommunication containing cavity, containing cavity has acoustic guide liquid, the first limit surface is formed in the containing cavity of treatment head shell, the first limit surface is perpendicular to the plane where the sound transmission port is located; Sound transmission membrane, cover in the sound transmission port; Moving shaft, one end movably inserted into the treatment head shell, the other end of the moving shaft is always outside the treatment head shell; Transducer assembly, including installation support and transducer arranged in the containing cavity, the installation support is fixed on the moving shaft, the transducer is arranged on the end surface of the installation support towards the sound transmission port, the side surface of the installation support towards the first limit surface is provided with first guide protrusion; First sealing sleeve and second sealing sleeve, respectively arranged on the two sides of the installation support along the axis direction of the moving shaft, the first sealing sleeve and the second sealing sleeve are used to isolate acoustic guide liquid; Deflection force generating structure, for continuously transmitting deflection force to the installation support, so that the installation support is deflected to the first limit surface, and the first guide protrusion is always pressed on the first limit surface; Wherein, the deflection force generating structure is that the first sealing sleeve and the second sealing sleeve are twisted and connected with the moving shaft, in the process of the movement of the installation support, the first sealing sleeve and the second sealing sleeve that are twisted continuously apply torsional force to the moving shaft, and the moving shaft drives the installation support to deflect.

2. A self-guiding ultrasound treatment head, characterized in that The utility model relates to a kind of medical ultrasound treatment device, including: Treatment head shell, with containing cavity and the sound transmission port of intercommunication containing cavity, containing cavity has acoustic guide liquid, the first limit surface is formed in the containing cavity of treatment head shell, the first limit surface is perpendicular to the plane where the sound transmission port is located; Sound transmission membrane, cover in the sound transmission port; Moving shaft, one end movably inserted into the treatment head shell, the other end of the moving shaft is always outside the treatment head shell; Transducer assembly, including installation support and transducer arranged in the containing cavity, the installation support is fixed on the moving shaft, the transducer is arranged on the end surface of the installation support towards the sound transmission port, the side surface of the installation support towards the first limit surface is provided with first guide protrusion; First sealing sleeve and second sealing sleeve, respectively arranged on the two sides of the installation support along the axis direction of the moving shaft, the first sealing sleeve and the second sealing sleeve are used to isolate acoustic guide liquid; Deflection force generating structure, for continuously transmitting deflection force to the installation support, so that the installation support is deflected to the first limit surface, and the first guide protrusion is always pressed on the first limit surface; Wherein, the deflection force generating structure includes first hook, second hook and tension spring, the first hook is arranged on the side surface of the installation support towards the first limit surface, the second hook is arranged on the treatment head shell on the side of the installation support towards the first limit surface, and the tension spring connects the first hook and the second hook, in the process of the movement of the installation support, the tension spring continuously applies tension to the installation support.

3. A self-guiding ultrasound treatment head, characterized in that The utility model relates to a self-guiding ultrasonic treatment head, comprising: a treatment head shell having a containing cavity and a sound transmission port communicating with the containing cavity, the containing cavity containing a sound guide liquid, the treatment head shell being formed with a first limiting surface in the containing cavity, the first limiting surface being perpendicular to the plane where the sound transmission port is located; a sound transmission membrane covering the sound transmission port; a moving shaft movably inserted into the treatment head shell at one end, the other end of the moving shaft being always outside the treatment head shell; a transducer assembly comprising a mounting bracket arranged in the containing cavity and a transducer, the mounting bracket being fixed to the moving shaft, the transducer being arranged on the end surface of the mounting bracket facing the sound transmission port, the mounting bracket being provided with a first guide protrusion on the side surface facing the first limiting surface; a first sealing sleeve and a second sealing sleeve being respectively arranged on both sides of the mounting bracket along the axis direction of the moving shaft, the first sealing sleeve and the second sealing sleeve being used for isolating the sound guide liquid; a deflection force generating structure for continuously transmitting a deflection force to the mounting bracket so as to deflect the mounting bracket towards the first limiting surface, the first guide protrusion always abutting against the first limiting surface; wherein the deflection force generating structure comprises a first magnetic member and a second magnetic member, the first magnetic member being arranged on the treatment head shell on the side of the mounting bracket away from the first limiting surface, the first magnetic member extending along the axis direction of the moving shaft, the second magnetic member being arranged on the side surface of the mounting bracket away from the first limiting surface, the first magnetic member continuously exerting a repulsion force on the second magnetic member in the process of movement of the mounting bracket.

4. The self-guided ultrasonic treatment head according to any one of claims 1-3, characterized in that, The normal pressure between the first guide protrusion and the first limiting surface is 0.0294N to 3.92N.

5. The self-guided ultrasonic treatment head of claim 4, wherein, The shape of the first guide protrusion is hemispherical or semicylindrical.

6. The self-guided ultrasonic treatment head of claim 5, wherein, The side surface of the mounting bracket facing the first limiting surface is provided with a circular hole, the circular hole being rollably provided with a ball, the ball forming the first guide protrusion, the material of the ball being ceramic.

7. The self-guided ultrasonic treatment head of claim 6, wherein, The mounting bracket is provided with a plurality of liquid channels penetrating through the mounting bracket along the axis direction of the moving shaft.

8. The self-guided ultrasonic treatment head of claim 7, wherein, The moving shaft is hollow, comprising a circular-arc-shaped cylinder and a cylindrical body connected together, the circular-arc-shaped cylinder and the cylindrical body being coaxially arranged, the mounting bracket being fixed to the cylindrical body, the self-guiding ultrasonic treatment head further comprising: a first mounting seat being sealingly arranged in the assembly hole of the treatment head shell, both ends of the first sealing sleeve being sealingly sleeved on the first mounting seat and the cylindrical body, an installation column being arranged on the end surface of the first mounting seat in the first sealing sleeve, the first mounting seat being provided with a circular-arc-shaped avoiding slot matching the circular-arc-shaped cylinder, the installation column and the circular-arc-shaped avoiding slot being coaxially arranged. A second mounting seat is arranged in the accommodating cavity and fixed to the treatment head shell. Two ends of the second sealing sleeve are respectively sealingly sleeved to the second mounting seat and the cylindrical barrel. An installation hole is arranged on an end face of the second mounting seat in the second sealing sleeve. The installation hole and the mounting column are coaxially arranged. A guide rod is arranged in a hollow manner. One end of the guide rod is sealingly sleeved to the mounting column. The other end of the guide rod is sealingly inserted into the installation hole. A sliding barrel is slidably sleeved to the guide rod. The cylindrical barrel is fixedly sleeved to the sliding barrel. A gas passage is arranged on an inner circumferential surface of the cylindrical barrel. The gas passage communicates the first sealing sleeve and the second sealing sleeve.

9. An ultrasonic treatment handpiece characterized by, The self-guiding ultrasonic treatment head comprises an ultrasonic treatment handle and a self-guiding ultrasonic treatment head as claimed in any one of claims 1-8. The ultrasonic treatment handle comprises a handle shell. The treatment head shell is detachably connected to the handle shell. A linear driving mechanism is arranged in the handle shell. An output end of the linear driving mechanism is detachably connected to the moving shaft.

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