Therapeutic head and therapeutic apparatus

Abstract

The utility model discloses a treatment head and a therapeutic apparatus, and relates to the technical field of medical instruments, the treatment head comprises a housing assembly, a transducer assembly and a connecting piece, the housing assembly comprises a sound transmission port; the transducer assembly is movably mounted in the shell assembly, and the transducer assembly is used for transmitting ultrasonic energy through the sound transmission opening; the connecting piece is connected with the transducer assembly, the external driving mechanism is suitable for being in driving connection with the connecting piece and drives the transducer assembly to move in the first direction through the connecting piece, and the connecting piece is in limiting fit with the shell assembly; the connecting piece is provided with a first position and a second position which are matched with the shell assembly in a limiting mode so as to limit the moving stroke of the connecting piece relative to the shell assembly, and therefore the problem that when the transducer moves, the transducer is prone to colliding with other parts of the treatment head is solved, and the safety of the treatment head is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of treatment head and therapeutic instrument. BACKGROUND

[0002] In the field of medical cosmetology, the treatment head as a key medical equipment component is widely used in various skin treatment and beauty. These treatment heads usually integrate energy generation unit and focusing unit, and the energy generation unit is responsible for generating the required treatment energy, such as ultrasonic wave, pulsed light or radio frequency, etc. The focusing unit is used to adjust the energy focusing position of the energy generation unit to adapt to different depth of skin tissue and treatment requirements. And by adjusting the energy focusing position, the treatment effect can be improved, and the damage to the surrounding healthy tissue is reduced.

[0003] However, in the prior art, when adjusting the focal length of the energy generation unit of the treatment head, due to the lack of effective limiting parts, the energy generation unit may move beyond the preset range, resulting in collision between the energy generation unit and other parts inside the treatment head, and even causing damage or failure of the equipment, affecting the continuity and safety of treatment. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of treatment head and therapeutic instrument, to solve the problem that the energy generation unit of existing treatment head is easy to collide with other parts of treatment head when moving.

[0005] To achieve the above-mentioned purpose, the treatment head provided by the utility model comprises:

[0006] The shell assembly comprises a sound transmission port.

[0007] The transducer assembly is movably installed in the shell assembly, and the transducer assembly is used to emit ultrasonic energy through the sound transmission port.

[0008] The connecting piece is connected with the transducer assembly, and an external driving mechanism is adapted to be drivingly connected with the connecting piece and to drive the transducer assembly to move in the first direction through the connecting piece, and the connecting piece is limitedly matched with the shell assembly.

[0009] The connecting piece has a first position and a second position limitedly matched with the shell assembly to limit the movement stroke of the connecting piece relative to the shell assembly.

[0010] In an embodiment of the utility model, the shell assembly includes an outer shell and a limiting piece arranged in the outer shell, the limiting piece includes two limiting plates arranged in the first direction in sequence, the connecting piece is at least partially limited between the two limiting plates, and the connecting piece is in abutment with the two limiting plates when the connecting piece is in the first position and the second position.

[0011] In an embodiment of the utility model, the limiting piece further includes a surrounding plate connecting the two limiting plates, and the surrounding plate and the two limiting plates form a limiting cavity.

[0012] The connecting piece includes a rotation-stopping part and two connecting parts arranged at both ends of the rotation-stopping part, the rotation-stopping part is matched with the limiting cavity and embedded in the limiting cavity, the two connecting parts extend out of the limiting cavity and are drivingly connected with an external driving mechanism and the transducer assembly respectively.

[0013] In an embodiment of the utility model, a rotation-stopping groove extending in the first direction is formed in the side surface of the rotation-stopping part, and a stop block is protrudingly arranged on the surrounding plate towards the limiting cavity, and the stop block is embedded in the rotation-stopping groove.

[0014] In an embodiment of the utility model, the treatment head further includes an optoelectronic displacement sensor, the optoelectronic displacement sensor is installed in the limiting cavity, one side of the rotation-stopping part is provided with a shielding block, the shielding block is located on the light propagation path of the optoelectronic displacement sensor, the optoelectronic displacement sensor detects the position of the shielding block to determine the moving position of the connecting piece in the first direction.

[0015] In an embodiment of the utility model, the shielding block is provided with a plurality of avoiding holes, the avoiding holes are arranged in the first direction in sequence, and the light of the optoelectronic displacement sensor transmits through the avoiding holes at different positions to determine the focusing position of the transducer assembly.

[0016] In an embodiment of the utility model, the treatment head further includes a focusing assembly, the connecting piece is drivingly connected with the external driving mechanism through the focusing assembly, the focusing assembly rotates under the driving of the external driving mechanism and drives the connecting piece to move in the first direction.

[0017] In an embodiment of the utility model, the focusing assembly includes a transmission member and a bearing;

[0018] The external driving mechanism is drivingly connected with the transmission member, the transmission member is further drivingly connected with the connecting piece, the bearing is sleeved on the outside of the transmission member, the transmission member is rotatably connected with the shell assembly through the bearing, and a sealing ring is arranged between the transmission member and the bearing and between the bearing and the shell assembly.

[0019] In one embodiment of the present invention, the treatment head further comprises a box body with openings at both ends;

[0020] The box is arranged in the shell assembly, and the box is used to accommodate the sound-conducting medium. The shell assembly blocks the opening at one end of the box, and the opening at the other end of the box is connected to the sound-transmitting port.

[0021] The present invention also provides a therapeutic device, which includes a handle and any one of the above-mentioned therapeutic heads.

[0022] The present invention provides a treatment head comprising a housing assembly, a transducer assembly, and a connector. The housing assembly includes a sound-transmitting port. The transducer assembly is movably mounted within a mounting cavity, and ultrasonic energy emitted by the transducer assembly is transmitted through the sound-transmitting port and applied to a treatment area. The connector is operatively connected to the transducer assembly and an external drive mechanism, respectively. The external drive mechanism drives the connector to move the transducer assembly in a first direction to adjust the focal length of the transducer assembly. The present invention provides a connector that is movably limited within a limiting cavity, wherein the connector has a first position and a second position that cooperate with the housing assembly to limit the connector's movement relative to the housing assembly between the first and second positions. Therefore, when the external drive mechanism drives the connector to move the transducer assembly to adjust the focus position of the transducer, the housing assembly limits the connector's movement direction, thereby limiting the transducer assembly's range of motion. This solves the problem of conventional treatment heads, where the transducer is prone to collision with other components of the treatment head during movement, thereby improving the safety of the treatment head. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of the treatment head provided by the utility model;

[0025] Figure 2 for Figure 1 Cross-sectional view of the treatment head along AA;

[0026] Figure 3 for Figure 1 Exploded view of the treatment head;

[0027] Figure 4 for Figure 3Structure diagram of connecting piece in treatment head.

[0028] Explanation of reference numerals:

[0029] 10, housing assembly; 11, outer shell; 11a, sound transmission port; 11b, mounting cavity; 111, front shell; 112, rear cover; 12, limiting piece; 12a, limiting plate; 12b, surrounding plate; 12c, limiting cavity; 20, transducer assembly; 30, connecting piece; 31, rotation-stopping part; 311, shielding block; 311a, avoiding hole; 312, rotation-stopping groove; 32, connecting part; 40, photoelectric displacement sensor; 50, focusing assembly; 51, transmission piece; 52, bearing; 53, sealing ring; 60, box body.

[0030] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0033] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0034] The present application provides a treatment head.

[0035] Combine Figures 1 to 3 As shown, in one embodiment of the present invention, the treatment head includes a housing assembly 10, a transducer assembly 20, and a connector 30; the housing assembly 10 includes a sound-transmitting opening 11a; the transducer assembly 20 is movably mounted in the housing assembly 10, and the transducer assembly 20 is used to transmit ultrasonic energy through the sound-transmitting opening 11a; the connector 30 is connected to the transducer assembly 20, and the external driving mechanism is suitable for driving connection with the connector 30 and driving the transducer assembly 20 to move in a first direction through the connector 30, and the connector 30 is limitedly engaged with the housing assembly 10;

[0036] The connecting member 30 has a first position and a second position for limiting engagement with the housing assembly 10 to limit a movable stroke of the connecting member 30 relative to the housing assembly 10 .

[0037] In this embodiment, a mounting cavity 11b is formed inside the housing assembly 10, and the mounting cavity 11b is used to mount components such as the transducer assembly 20 and the connector 30. At the same time, a sound-permeable opening 11a is formed at one end of the housing assembly 10, and a sound-permeable membrane is attached to the sound-permeable opening 11a. The ultrasonic energy emitted by the transducer assembly 20 passes through the sound-permeable opening 11a, the sound-permeable membrane, and acts on the treatment area. When it is necessary to adjust the ultrasonic focusing depth of the transducer assembly 20, the connector 30 is driven by the driving structure, thereby driving the transducer assembly 20 to move along the first direction. The first direction in this application is Figure 2 The vertical direction in .

[0038] The connector 30 is movably limited within the housing assembly 10 and, under the limited cooperation of the housing assembly 10, moves between a first position and a second position. Specifically, a limited cavity 12c can be provided within the housing assembly 10, and the connector 30 can be movably provided within the limited cavity 12c. In the first position and the second position, the connector 30 abuts against two oppositely disposed walls of the limited cavity 12c, respectively. A limited member 12 can also be provided within the housing assembly 10. When the connector 30 moves to the first position or the second position within the housing assembly 10, the connector 30 abuts against the limited member 12, thereby limiting the further movement of the connector 30.

[0039] The present application achieves the purpose of limiting the moving range of the transducer assembly 20 by limiting the moving range of the connecting member 30. Since the shell assembly 10 and the connecting member 30 are limited in position, when the transducer assembly 20 moves to the extreme position, there is no direct contact between the transducer assembly 20 and the shell assembly 10, thereby solving the problem that the existing transducer is prone to collision with other components when moving, thereby improving the safety of the treatment head.

[0040] Combine Figure 2As shown, in one embodiment of the present invention, the shell assembly 10 includes a shell 11 and a limiting member 12 arranged in the shell 11, the limiting member 12 includes two limiting plates 12a arranged in sequence along the first direction, and the connecting member 30 is at least partially limited between the two limiting plates 12a. When the connecting member 30 is in the first position and the second position, it abuts against the two limiting plates 12a respectively.

[0041] In this embodiment, a mounting cavity 11b is formed inside the housing 11, and a sound-permeable opening 11a connected to the mounting cavity 11b is opened at one end. The housing 11 includes a front housing 111 and a rear cover 112. The rear cover 112 is detachably provided on the front housing 111 and encloses the front housing 111 to form the mounting cavity 11b. Two limit plates 12a are arranged in parallel with each other inside the housing 11. Specifically, the two limit plates 12a can be installed on the inner wall of the housing 11 by means of detachable connection such as snap connection and threaded connection, or can be an integrally formed structure with the housing 11. The spacing between the two limit plates 12a is the range of movement of the connector 30 between the first position and the second position. Since the connector 30 serves to connect the external drive mechanism and the transducer assembly 20, the range of movement of the transducer assembly 20 during focusing is limited.

[0042] By positioning the connector 30 between the two limiting plates 12a, the present invention makes it easier to design the connector 30 to match the limiting plates 12a, compared to solutions that limit the transducer assembly 20 between the two limiting plates 12a. This improves assembly convenience and reduces manufacturing difficulty. Furthermore, a rubber pad is provided on the inner side of the limiting plates 12a to further enhance positioning stability and reduce noise.

[0043] Combine Figure 2 As shown, in one embodiment of the present invention, the limiting member 12 further includes a surrounding plate 12b connecting the two limiting plates 12a, and the surrounding plate 12b and the two limiting plates 12a are enclosed to form a limiting cavity 12c;

[0044] The connecting member 30 includes a stop portion 31 and two connecting portions 32 respectively arranged at both ends of the stop portion 31. The stop portion 31 is adapted to the limiting cavity 12c and is embedded in the limiting cavity 12c. The two connecting portions 32 extend out of the limiting cavity 12c and are respectively driven and connected to the external driving mechanism and the transducer assembly 20.

[0045] In the embodiment, the surrounding plate 12b can be connected with the two limiting plates 12a by welding, threaded connection or the like, or can be integrally formed with at least one of the limiting plates 12a to improve the assembly efficiency. The shape of the limiting cavity 12c is the same as that of the rotation-stopping portion 31, and is adapted to the rotation-stopping portion 31. When the rotation-stopping portion 31 is embedded in the limiting cavity 12c, the circumferential surface of the rotation-stopping portion 31 is in contact with or at least partially in contact with the cavity wall of the limiting cavity 12c. Therefore, when the connecting piece 30 moves in the first direction, that is, moves in the axial direction of the rotation-stopping portion 31, the side wall of the limiting cavity 12c can limit the rotation-stopping portion 31 in the radial direction to improve the stability of the connecting piece 30 during movement. The connecting holes are formed on the surfaces of the two limiting plates 12a, and the two connecting portions 32 of the connecting piece 30 pass through the two connecting holes respectively and are drivingly connected with the external driving mechanism and the transducer assembly 20 respectively.

[0046] In combination Figure 2 and Figure 4 As shown in the figure, in an embodiment of the utility model, the side surface of the rotation-stopping portion 31 is provided with a rotation-stopping groove 312 extending in the first direction, and the surrounding plate 12b is provided with a stop block facing the limiting cavity 12c, and the stop block is embedded in the rotation-stopping groove 312.

[0047] In the embodiment, the cooperation of the stop block and the rotation-stopping groove 312 achieves the purpose of limiting the rotation of the connecting piece 30 in the circumferential direction thereof. In combination with the scheme of limiting the rotation-stopping portion 31 in the radial direction by the side wall of the limiting cavity 12c, on the basis of this, the limiting piece 12 is provided so that the connecting piece 30 can stably move in the first direction, thereby reducing the occurrence of problems such as shaking and position deviation of the transducer assembly 20 during the adjustment of the focal length.

[0048] Further, the groove wall of the rotation-stopping groove 312 is designed in a circular arc shape, and a circular chamfer is arranged at the opening of the rotation-stopping groove 312. Similarly, the outer surface of the stop block is also designed in a circular arc shape and is adapted to the rotation-stopping groove 312, thereby improving the convenience of cooperation of the stop block and the rotation-stopping groove 312 and reducing the friction between the stop block and the surrounding plate 12b.

[0049] In combination Figures 2 to 4 As shown in the figure, in an embodiment of the utility model, the treatment head further comprises an optical displacement sensor 40, the optical displacement sensor 40 is installed in the limiting cavity 12c, one side of the rotation-stopping portion 31 is provided with a shielding block 311, the shielding block 311 is located on the light propagation path of the optical displacement sensor 40, and the optical displacement sensor 40 detects the position of the shielding block 311 to judge the moving position of the connecting piece 30 in the first direction.

[0050] In the embodiment, the photoelectric displacement sensor 40 adopts a high-precision photoelectric element, transmits and receives light signals, and detects the moving position of the connecting piece 30 according to the change of the light signals. The shielding block 311 is arranged on the side of the rotation-stopping part 31 and is made of light-proof metal or plastic material, and is designed to match the light propagation path, so that the photoelectric displacement sensor 40 can judge the moving position of the connecting piece 30 by shielding and avoiding the light when the connecting piece 30 moves in the first direction. The photoelectric displacement sensor 40 transmits the detected signal to the control unit, so as to control the movement of the transducer assembly 20, thereby realizing accurate focusing.

[0051] In combination Figure 4 As shown in the embodiment of the utility model, the shielding block 311 is provided with a plurality of avoiding holes 311a, and the avoiding holes 311a are arranged in sequence and at intervals in the first direction, and the light of the photoelectric displacement sensor 40 transmits through the avoiding holes 311a at different positions to judge the focusing position of the transducer assembly 20.

[0052] In the embodiment, the size of the avoiding hole 311a and the interval distance between the avoiding holes 311a are designed according to the detection range, accuracy requirement and detection position setting of the photoelectric displacement sensor 40. Specifically, different avoiding holes 311a correspond to different focusing positions of the transducer assembly 20, so that, in the movement process of the connecting piece 30, the light of the photoelectric displacement sensor 40 transmits through the avoiding holes 311a at different positions to judge the focusing position of the transducer assembly 20, thereby realizing accurate focusing of the transducer assembly 20.

[0053] For example, when the shielding block 311 is provided with three avoiding holes 311a, different avoiding holes 311a correspond to different focusing gears of the transducer, and when the connecting piece 30 moves to the uppermost avoiding hole 311a corresponding to the light signal propagation path of the photoelectric sensor, the transducer assembly 20 is located at the first gear focusing position; when it is needed to switch to the second gear focusing position, the connecting piece 30 is controlled to move to the avoiding hole 311a at the middle position corresponding to the light signal propagation path of the photoelectric sensor, thereby realizing accurate and rapid adjustment of the multiple gear focusing positions of the transducer assembly 20.

[0054] In combination Figure 2 And Figure 3 As shown in the embodiment of the utility model, the treatment head further comprises a focusing assembly 50, the connecting piece 30 is drivingly connected with an external driving mechanism through the focusing assembly 50, the focusing assembly 50 rotates under the driving of the external driving mechanism and drives the connecting piece 30 to move in the first direction.

[0055] In the embodiment, the focusing assembly 50 is used to realize the transmission between the external driving mechanism and the connecting piece 30. Since the output shaft of the driving mechanism is usually rotated along the circumferential direction, and the connecting piece 30 is limited on the side wall of the limiting cavity 12c in the circumferential direction according to the above embodiment, the focusing assembly 50 is arranged to convert the rotating power into the power moving in the first direction. For example, a threaded hole is arranged at one end of the focusing assembly 50 facing the connecting piece 30, and the connecting part 32 of the connecting piece 30 is arranged with external threads, so that the connecting part 32 is screwed with the focusing assembly 50, and the focusing assembly 50 is rotated to drive the connecting piece 30 to move in the first direction.

[0056] In combination with Figure 2 and Figure 3 As shown in the figure, in an embodiment of the utility model, the focusing assembly 50 includes a transmission piece 51 and a bearing 52.

[0057] The external driving mechanism is drivingly connected with the transmission piece 51, the transmission piece 51 is further drivingly connected with the connecting piece 30, the bearing 52 is sleeved on the outside of the transmission piece 51, the transmission piece 51 is rotatably connected with the shell assembly 10 through the bearing 52, and the transmission piece 51 and the bearing 52 and the bearing 52 and the shell assembly 10 are all provided with sealing rings 53.

[0058] In the embodiment, the transmission piece 51 and the bearing 52 are made of high-strength alloy steel, and the surface is hardened to improve wear resistance and service life. The transmission piece 51 is provided with a threaded hole and is used to connect with the connecting piece 30. One end of the transmission piece 51 away from the connecting piece 30 is provided with a matching part, and the matching part is used to drive the external driving mechanism, and the matching part can be a structure with concave-convex surfaces, and the transmission is realized by cooperating with the driving mechanism. The matching part can also be fixed with the driving mechanism through bolts, hooks and other fixing members, and the transmission is realized. The bearing 52 is sleeved on the outside of the transmission piece 51, and the transmission piece 51 is rotatably arranged relative to the shell assembly 10 through the bearing 52, which reduces the friction between the transmission piece 51 and the shell assembly 10, improves the service life and transmission efficiency of the transmission piece 51. The bearing 52 itself can have a waterproof effect, and the sealing between the transmission piece 51 and the bearing 52 can be realized by the sealing ring 53, and the sealing between the bearing 52 and the shell assembly 10 can also be realized by the sealing ring 53, so that the shell assembly 10 is prevented from leaking liquid.

[0059] In combination with Figures 1 to 3 As shown in the figure, in an embodiment of the utility model, the treatment head further includes a box 60 with two open ends; the box 60 is arranged in the shell assembly 10, the box 60 is used to accommodate the sound guide medium, the shell assembly 1 blocks one end of the box 60, and the other end of the box 60 is communicated with the sound transmission port 11a.

[0060] In this embodiment, the stopper 12 blocks the opening at one end of the housing 60. The anti-rotation portion 31 of the connector 30 is disposed within the limiting cavity 12c of the stopper 12. The connecting portion 32 at one end of the connector 30 passes through the stopper 12 and is inserted into the housing 60, where it is driven and connected to the transducer assembly 20 disposed within the housing 60. The sound-conducting medium is water. The opening at the other end of the housing 60 communicates with the sound-transmitting port 11a, which is sealed with a sound-transmitting membrane to accommodate the sound-conducting medium within the housing 60 and enhance the propagation of ultrasonic waves emitted by the transducer assembly 20. The connection between the stopper 12 and the housing 60 can be a snap-fit ​​or threaded connection. A sealing ring 53 is provided between the stopper 12 and the housing 60 to ensure good sealing within the housing 60 and a reliable connection.

[0061] The present invention also proposes a therapeutic device, which includes a handle and a therapeutic head. The specific structure of the therapeutic head refers to the above-mentioned embodiment. Since the therapeutic device adopts all the technical solutions of all the embodiments of the above-mentioned treatment heads, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0062] The handle and treatment head are detachably connected. Specifically, the housing 11 of the treatment head engages with the housing 11 of the handle, and the connector 30 in the treatment head is detachably connected to the drive mechanism in the handle via the focusing assembly 50. When the energy focus position needs to be adjusted during treatment, the drive mechanism is controlled to drive the focusing assembly 50 and the connector 30 to rotate, thereby driving the transducer assembly 20 to move vertically to adjust the focus position of the transducer assembly 20. During the adjustment process, the connector 30 is limited by the limiter 12 to move between the first position and the second position, thereby preventing the transducer assembly 20 from colliding with the housing assembly 10 or other components during movement.

[0063] The above are merely exemplary embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A treatment head, characterized in that: The treatment head comprises: A housing assembly, the housing assembly including a sound-permeable port; a transducer assembly, the transducer assembly being movably mounted in the housing assembly and configured to transmit ultrasonic energy through the sound-transmitting opening; a connecting member, the connecting member being connected to the transducer assembly, and an external driving mechanism being adapted to be drivingly connected to the connecting member and driving the transducer assembly to move along a first direction via the connecting member, and the connecting member being in position-limiting cooperation with the housing assembly; The connecting member has a first position and a second position that are limitedly matched with the housing assembly to limit the movable stroke of the connecting member relative to the housing assembly.

2. The treatment head according to claim 1, wherein: The shell assembly includes an outer shell and a limiting member arranged in the outer shell, the limiting member includes two limiting plates arranged in sequence along the first direction, the connecting member is at least partially limited between the two limiting plates, and when the connecting member is in the first position and the second position, it abuts against the two limiting plates respectively.

3. The treatment head according to claim 2, wherein: The limiting member further includes a surrounding plate connecting the two limiting plates, wherein the surrounding plate and the two limiting plates enclose a limiting cavity; The connecting part includes a stopper and two connecting parts respectively arranged at both ends of the stopper, the stopper is adapted to the limiting cavity and is embedded in the limiting cavity, the two connecting parts extend out of the limiting cavity and are respectively connected to the external driving mechanism and the transducer assembly.

4. The treatment head according to claim 3, wherein: A rotation-stop groove extending along the first direction is formed on the side surface of the rotation-stop portion, and a stop block is protruded from the enclosure toward the limiting cavity, and the stop block is embedded in the rotation-stop groove.

5. The treatment head according to claim 3, wherein: The treatment head also includes a photoelectric displacement sensor, which is installed in the limit cavity. A blocking block is provided on one side of the anti-rotation part. The blocking block is located on the light propagation path of the photoelectric displacement sensor. The photoelectric displacement sensor detects the position of the blocking block to determine the movement position of the connecting member along the first direction.

6. The treatment head according to claim 5, wherein: The shielding block is provided with a plurality of avoidance holes, which are sequentially spaced apart along the first direction. The light of the photoelectric displacement sensor passes through the avoidance holes at different positions to determine the focusing position of the transducer assembly.

7. The treatment head according to any one of claims 1 to 6, characterized in that: The treatment head further includes a focusing assembly, through which the connecting member is driven and connected to an external driving mechanism. The focusing assembly rotates under the drive of the external driving mechanism and drives the connecting member to move along the first direction.

8. The treatment head according to claim 7, wherein: The focusing assembly includes a transmission member and a bearing; The external driving mechanism is drivingly connected to the transmission member, and the transmission member is also drivingly connected to the connecting member. The bearing is sleeved on the outside of the transmission member, and the transmission member is rotatably connected to the housing assembly through the bearing. Sealing rings are provided between the transmission member and the bearing, and between the bearing and the housing assembly.

9. The treatment head according to any one of claims 1 to 6, characterized in that: The treatment head also includes a box body with openings at both ends; The box is arranged in the shell assembly, and the box is used to accommodate the sound-conducting medium. The shell assembly blocks the opening at one end of the box, and the opening at the other end of the box is connected to the sound-transmitting port.

10. A therapeutic device, characterized in that: The therapeutic device comprises a handle and a therapeutic head according to any one of claims 1 to 9.

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