Ultrasonic treatment device with adjustable focus depth

Abstract

The utility model relates to the technical field of ultrasonic treatment, and particularly discloses a focus depth adjustable ultrasonic treatment device, which comprises a handle and a treatment head, the treatment head is detachably connected with the handle, the handle comprises a shell and a driving assembly, the shell is provided with a mounting cavity, and the driving assembly is arranged in the mounting cavity; the treatment head comprises a shell, a cover body and an energy converter, the shell is provided with a containing cavity, the cover body covers the shell in a sealed mode and seals the containing cavity, the energy converter is arranged in the containing cavity, the driving assembly is provided with a driving rod capable of outputting linear displacement, the cover body is provided with a driving hole, and the driving hole is communicated with the driving rod. The driving assembly is provided with a driving hole, the driving rod penetrates through the driving hole in a sealed mode and is detachably connected with the energy converter in a magnetic attraction mode, and the driving assembly drives the energy converter to move linearly through the driving rod so as to adjust the focus depth of the energy converter.

Description

Technical Field

[0001] This utility model relates to the field of ultrasound therapy technology, specifically to an ultrasound therapy device with adjustable focal depth. Background Technology

[0002] Currently available ultrasound therapy devices use a transducer within the treatment head, driven by a mechanism such as a screw motor, to move the transducer longitudinally and adjust the depth of the transducer's focal point. However, the treatment head and handle of such devices are not detachable. If either the treatment head or handle malfunctions, replacement becomes extremely difficult due to the non-detachable nature of the handle, potentially rendering the entire ultrasound therapy device unusable and causing significant losses. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an ultrasound therapy device with adjustable focal depth, featuring a detachable connection between the treatment head and the handle, thus resolving the problems in the prior art.

[0004] This utility model discloses an ultrasound therapy device with adjustable focal depth, comprising a handle and a treatment head, wherein the treatment head is detachably connected to the handle, and the handle comprises a housing and a drive assembly, wherein the housing is provided with a mounting cavity, and the drive assembly is disposed within the mounting cavity;

[0005] The treatment head includes a housing, a cover, and a transducer. The housing has a receiving cavity, and the cover is sealed over the housing to seal the receiving cavity. The transducer is disposed inside the receiving cavity. The drive assembly has a drive rod capable of outputting linear displacement. The cover has a drive hole, and the drive rod passes through the drive hole in a sealed manner and is detachably magnetically connected to the transducer. The drive assembly drives the transducer to move linearly through the drive rod to adjust the focal depth of the transducer.

[0006] As a preferred embodiment, the end face of the cover near the transducer is provided with a boss, the drive hole passes through the boss, a waterproof telescopic bladder is fitted on the boss, and the part of the drive rod that extends into the receiving cavity is disposed in the waterproof telescopic bladder.

[0007] The transducer is provided with a first magnetic accumulator at the position corresponding to the drive rod, and the drive rod and the transducer are magnetically connected through the first magnetic accumulator.

[0008] Alternatively, the end of the drive rod is provided with a second magnetic chuck, and the transducer is provided with a third magnetic chuck at a position corresponding to the drive rod, and the drive rod and the transducer are magnetically connected through the second magnetic chuck and the third magnetic chuck.

[0009] As a preferred embodiment, the end face of the cover away from the housing is provided with a rotating buckle, and the end face of the housing near the treatment head is provided with a rotating slot corresponding to the position of the rotating buckle. The rotating buckle is inserted into the rotating slot to achieve a rotating engagement.

[0010] As a preferred embodiment, the rotating buckle includes a snap-fit ​​arm and a snap-fit ​​block, the snap-fit ​​block being disposed on the side of the free end of the snap-fit ​​arm; the rotating slot includes a receiving slot and a limiting block disposed within the receiving slot, the limiting block being connected to one long side wall of the receiving slot, the gap between the limiting block and one end side wall of the receiving slot forming an insertion port for the snap-fit ​​arm to be inserted into the receiving slot, the gap between the limiting block and the other long side wall of the receiving slot forming a guide groove for the snap-fit ​​arm to rotate, and the gap between the limiting block and the bottom wall of the receiving slot forming a receiving portion for receiving the snap-fit ​​block.

[0011] As a preferred embodiment, the end face of the cover away from the shell is provided with a foolproof protrusion, and the end face of the shell near the treatment head is provided with a foolproof groove. Only when the foolproof protrusion is inserted into the foolproof groove will the rotating buckle be inserted into the rotating slot to achieve rotational locking.

[0012] As a preferred embodiment, a mounting base is provided on the inner side wall of the housing, and a guide shaft is provided on the mounting base. The guide shaft is located on the outer side of the transducer, and a guide shaft sleeve is provided on the outer side wall of the transducer. The guide shaft sleeve is slidably sleeved on the guide shaft.

[0013] As a preferred embodiment, the transducer includes a mounting frame and a transducer unit. The guide sleeve is disposed on the outer side wall of the mounting frame. The mounting frame is provided with a mounting groove. The transducer unit is embedded in the mounting groove. The mounting frame is provided with a connecting part on the side near the cover. The drive rod is magnetically connected to the connecting part.

[0014] As a preferred embodiment, two guide shafts are provided, which are respectively distributed on both sides of the transducer. The mounting base is provided with two fixing holes, and one end of each guide shaft is inserted into the fixing hole. The cover is provided with a mounting hole and a fault-tolerant mounting hole at positions corresponding to the two fixing holes. The diameter of the fault-tolerant mounting hole is larger than the diameter of the mounting hole, and the other end of each guide shaft is inserted into the mounting hole and the fault-tolerant mounting hole, respectively.

[0015] As a preferred embodiment, the mounting cavity is further provided with a stroke control component, which includes a photoelectric switch and a sensing device. The photoelectric switch includes a start switch and an end switch, which are spaced apart on the inner sidewall of the housing along the movement direction of the drive rod. The sensing device is disposed on the drive rod and located between the start switch and the end switch.

[0016] As a preferred embodiment, the cover is further provided with a pressure balancing device, which includes a retractable bladder. The sidewall of the retractable bladder is corrugated and has a vent. The sidewall of the cover is provided with a mounting body. The vent is sealed and fitted onto the mounting body. The mounting body has a connecting hole that communicates with the inner cavity of the retractable bladder. The retractable bladder is located within the receiving cavity or within the mounting cavity.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The ultrasonic therapy device of this utility model has a handle and a treatment head that are detachably connected. The drive component inside the handle is provided with a drive rod that can output linear displacement. The drive rod passes through the drive hole in a sealable manner and is detachably magnetically connected to the transducer. The drive component drives the transducer to move linearly through the drive rod, thereby achieving the purpose of adjusting the focal depth of the transducer.

[0018] Furthermore, since the drive rod of the drive component inside the handle is detachably magnetically connected to the transducer inside the treatment head, the drive rod can quickly connect or disconnect from the transducer when the treatment head and handle are assembled or disassembled. This improves the convenience of assembling and disassembling the treatment head and handle, and allows for timely replacement when the treatment head or handle is damaged, avoiding the scrapping of the entire ultrasound therapy device and minimizing losses. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a cross-sectional view of the ultrasonic therapy device with adjustable focal depth according to an embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional structural schematic diagram of the ultrasound therapy device with adjustable focal depth according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the outer end face of the cover of the ultrasound therapy device with adjustable focal depth according to an embodiment of the present invention.

[0023] Figure 4 This is a cross-sectional schematic diagram of the connection between the cover and the connecting plate of the ultrasound therapy device with adjustable focal depth according to an embodiment of the present invention.

[0024] In the diagram: 100, Handle; 200, Treatment head; 1, Outer shell; 10, Mounting cavity; 11, Rotating slot; 111, Storage slot; 112, Limiting block; 113, Insertion port; 114, Guide groove; 115, Storage section; 12, Anti-foolproof groove; 13, Adapter plate; 2, Control board; 3, Drive assembly; 31, Screw motor; 32, Drive rod; 33, Second magnetic chuck; 4, Housing; 40, Receiving cavity; 41, Mounting port; 42, Sound-permeable port; 43, Sound-permeable membrane; 44, Mounting base; 45, Guide shaft; 46. ​​Fixing hole; 5. Cover body; 51. Drive hole; 52. Boss; 53. Rotary buckle; 531. Snap-fit ​​arm; 532. Snap-fit ​​block; 54. Anti-foolproof protrusion; 55. Mounting hole; 56. Fault-tolerant mounting hole; 57. Mounting body; 6. Transducer; 61. Mounting bracket; 62. Guide bushing; 63. Transducer unit; 64. Connecting part; 65. Third magnetic accumulator; 7. Waterproof telescopic bladder; 8. Stroke control component; 81. Sensing device; 82. Start switch; 83. End switch; 9. Pressure balancing device. Detailed Implementation

[0025] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0026] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Combination Figures 1 to 4As shown, this utility model discloses an ultrasound therapy device with adjustable focal depth, comprising a handle 100 and a treatment head 200, which are detachably connected. The handle 100 includes a housing 1, a control board 2, and a drive assembly 3. The housing 1 has a mounting cavity 10, and both the control board 2 and the drive assembly 3 are disposed within the mounting cavity 10. The control board 2 is electrically connected to the drive assembly 3 and is used to control the operation of the drive assembly 3.

[0028] The treatment head 200 includes a housing 4, a cover 5, and a transducer 6. The housing 4 has a receiving cavity 40, and the transducer 6 is disposed within the receiving cavity 40. One end of the housing 4 near the handle 100 has an installation port 41, and the other end has a sound-transmitting port 42. The cover 5 is sealed over the installation port 41, and the sound-transmitting port 42 is sealed with a sound-transmitting membrane 43, thereby forming a sealed cavity 40, which is beneficial for filling the receiving cavity 40 with conductive fluid. The sound-emitting surface of the transducer 6 faces the sound-transmitting port 42, ensuring that the ultrasonic energy emitted by the transducer 6 is emitted directly towards the sound-transmitting port 42, thus improving the treatment effect.

[0029] The drive assembly 3 is equipped with a drive rod 32 capable of outputting linear displacement. The cover 5 is provided with a drive hole 51. The drive rod 32 passes through the drive hole 51 in a sealed manner and is detachably magnetically connected to the transducer 6. The drive assembly 3 enables the drive rod 32 to output linear displacement, thereby driving the transducer 6 to perform reciprocating linear motion, which in turn allows adjustment of the focal position of the transducer 6, achieving the purpose of adjustable focal depth.

[0030] Furthermore, since the drive rod 32 of the drive assembly 3 inside the handle 100 is detachably magnetically connected to the transducer 6 inside the treatment head 200, the drive rod 32 can quickly connect or disconnect from the transducer 6 when the treatment head 200 and the handle 100 are assembled or disassembled. This improves the convenience of assembling and disassembling the treatment head 200 and the handle 100, and allows for timely replacement when the treatment head 200 or the handle 100 is damaged, avoiding the scrapping of the entire ultrasound therapy device and minimizing losses.

[0031] The end face of the cover 5 near the transducer 6 has a boss 52, through which the drive hole 51 passes. A waterproof telescopic bladder 7 is provided inside the receiving cavity 40. The waterproof telescopic bladder 7 is fitted onto the boss 52 to seal the drive hole 51 and prevent the conductive fluid from flowing out of the drive hole 51. The part of the drive rod 32 that extends into the receiving cavity 40 is located inside the waterproof telescopic bladder 7. The waterproof telescopic bladder 7 wraps around the drive rod 32 to prevent the conductive fluid from contacting the drive rod 32.

[0032] A first magnetic attractor is provided at the position corresponding to the transducer 6 and the drive rod 32. Since the drive rod 32 is made of ferromagnetic material, it can be attracted by the first magnetic attractor. Therefore, the drive rod 32 and the transducer 6 can be detachably magnetically connected through the first magnetic attractor.

[0033] Alternatively, the end of the drive rod 32 is provided with a second magnetic 33, and the transducer 6 is provided with a third magnetic 65 at the position corresponding to the drive rod 32. The drive rod 32 and the transducer 6 are magnetically connected through the second magnetic 33 and the third magnetic 65.

[0034] Combination Figure 3 and Figure 4 As shown, the end face of the cover 5 away from the shell 4 is provided with a rotating buckle 53, and the end face of the shell 1 near the treatment head 200 is provided with a rotating slot 11 corresponding to the position of the rotating buckle 53. The rotating buckle 53 is inserted into the rotating slot 11 to achieve a rotating engagement.

[0035] Specifically, the rotating buckle 53 includes a snap-fit ​​arm 531 and a snap-fit ​​block 532. The snap-fit ​​block 532 is disposed on the side of the free end of the snap-fit ​​arm 531, so that the snap-fit ​​block 532 and the end face of the treatment head 200 are spaced apart. The rotating slot 11 is arc-shaped, and its center coincides with the rotation axis of the drive rod 32. The rotating slot 11 includes a receiving slot 111 and a limiting block 112 disposed in the receiving slot 111. The limiting block 112 is connected to one long side wall of the receiving slot 111. The gap between the limiting block 112 and one end side wall of the receiving slot 111 forms an insertion port 113 for inserting the snap-fit ​​arm 531 into the receiving slot 111. The gap between the limiting block 112 and the other long side wall of the receiving slot 111 forms a guide groove 114 for the snap-fit ​​arm 531 to rotate. The gap between the limiting block 112 and the bottom wall of the receiving slot 111 forms a receiving part 115 for receiving the snap-fit ​​block 532.

[0036] When the treatment head 200 and the handle 100 are rotated and engaged, the engagement arm 531 of the rotating latch 53 first inserts into the storage slot 111 from the insertion port 113 of the rotating slot 11, and then begins to rotate the treatment head 200. During the rotation, the engagement arm 531 moves along the guide slot 114, so that the engagement block 532 slides smoothly into the storage part 115, thereby realizing the rotational engagement of the treatment head 200 and the handle 100.

[0037] When the treatment head 200 is rotated to disassemble the handle 100, the treatment head 200 is rotated in the opposite direction, causing the locking arm 531 to move in the opposite direction along the guide groove 114, causing the locking block 532 to leave the storage part 115, until the locking arm 531 of the rotating buckle 53 moves into the insertion port 113. At this time, the locking arm 531 can be pulled out from the insertion port 113, thus realizing the disassembly and separation of the treatment head 200 and the handle 100.

[0038] The end face of the cover 5 facing away from the housing 4 is also provided with a foolproof protrusion 54, and the end face of the outer shell 1 near the treatment head 200 is also provided with a foolproof groove 12. Only when the foolproof protrusion 54 is inserted into the foolproof groove 12 can the rotating buckle 53 be inserted into the rotating slot 11 to achieve rotational locking. The corresponding cooperation between the foolproof protrusion 54 and the foolproof groove 12 can ensure the correct connection between the treatment head 200 and the handle 100, and ensure that the electrical connection wires of the control board 2 inside the handle 100 and the electrical connection wires inside the treatment head 200 can be correctly connected.

[0039] An adapter plate 13 is provided at one end of the outer shell 1 near the treatment head 200. The adapter plate 13 seals the mounting cavity 10 of the outer shell 1. A through hole 131 is provided in the middle of the adapter plate 13. The drive rod 32 passes through the through hole 131. The rotating slot 11 and the anti-fooling groove 12 are both provided on the adapter plate 13.

[0040] A mounting base 44 is provided on the inner wall of the housing 4, and a guide shaft 45 is provided on the mounting base 44. The guide shaft 45 is located on the outer side of the transducer 6, and a guide sleeve 62 is provided on the outer wall of the transducer 6. The guide sleeve 62 is slidably fitted onto the guide shaft 45. When the transducer 6 reciprocates in linear motion, the guide shaft 45 guides the transducer 6 to ensure the smoothness of the transducer 6's movement and improve the therapeutic effect.

[0041] like Figure 1 and Figure 3 As shown, the transducer 6 includes a mounting frame 61 and a transducer unit 63. A guide sleeve 62 is provided on the outer side wall of the mounting frame 61. A connecting groove is provided on the side of the mounting frame 61 near the sound-transmitting port 42. The transducer unit 63 is embedded in the connecting groove. A connecting part 64 is provided on the side of the mounting frame 61 near the cover 5. A first magnetic attractor or a third magnetic attractor 65 is provided on the connecting part 64.

[0042] Two guide shafts 45 are provided, respectively distributed on both sides of the transducer 6. The mounting base 44 has two corresponding fixing holes 46. One end of each guide shaft 45 is inserted into a fixing hole 46. The cover 5 has mounting holes 55 and fault-tolerant mounting holes 56 at positions corresponding to the two fixing holes 46. The diameter of the fault-tolerant mounting holes 56 is larger than the diameter of the mounting holes 55. The other ends of each guide shaft 45 are inserted into the mounting holes 55 and fault-tolerant mounting holes 56, respectively. The fault-tolerant mounting holes 56 can absorb errors during the assembly of the guide shafts 45 with the cover 5 and mounting base 44, facilitating a smooth assembly of the cover 5 with the housing 4.

[0043] The drive assembly 3 includes a screw motor 31, with a drive rod 32 housed within the screw motor 31. The drive assembly 3 may also include a linear motor, with the drive rod 32 housed within the linear motor. Both the screw motor 31 and the linear motor can convert electromagnetic energy into mechanical energy, causing the drive rod 32 to output linear displacement.

[0044] In addition, the drive assembly 3 may also include a hydraulic cylinder or a pneumatic cylinder, with the drive rod 32 disposed within the hydraulic cylinder or pneumatic cylinder. Alternatively, the drive assembly 3 may include a cam mechanism, with the upper end of the drive rod 32 abutting against the cam of the cam mechanism, and the cam rotating to drive the drive rod 32 to perform reciprocating linear motion.

[0045] The mounting cavity 10 is also equipped with a stroke control component 8, which includes a photoelectric switch and a sensing device 81. The photoelectric switch includes a start switch 82 and an end switch 83, which are spaced apart on the inner wall of the housing 1 along the movement direction of the drive rod 32. The sensing device 81 is mounted on the drive rod 32, located between the start switch 82 and the end switch 83. The drive rod 32 can drive the sensing device 81 to move linearly, so that the sensing device 81 passes through the start switch 82 and the end switch 83 respectively. The distance between the start switch 82 and the end switch 83 is the stroke of the transducer 6's focal point movement, which can realize precise control of the focal point movement stroke of the transducer 6.

[0046] like Figure 1 As shown, the cover 5 is also provided with a pressure balancing device 9. The pressure balancing device 9 includes a retractable bladder. The side wall of the retractable bladder is corrugated. The retractable bladder is provided with a vent. The side wall of the cover 5 is provided with a mounting body 57. The vent is sealed and fitted to the mounting body 57. The mounting body 57 is provided with a connecting hole. The connecting hole communicates with the inner cavity of the retractable bladder.

[0047] The retractable bladder is disposed within the receiving cavity 40, and the connecting hole connects the inner cavity of the retractable bladder with the mounting cavity 10.

[0048] As an extension, a retractable bladder is disposed within the mounting cavity 10, and a connecting hole connects the inner cavity of the retractable bladder with the receiving cavity 40.

[0049] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0050] The ultrasonic therapy device of this utility model has a detachable connection between the handle and the treatment head. The drive component inside the handle is equipped with a drive rod that can output linear displacement. The drive rod passes through the drive hole in a sealable manner and is detachably magnetically connected to the transducer. The drive component drives the transducer to move linearly through the drive rod, thereby achieving the purpose of adjusting the focal depth of the transducer.

[0051] Furthermore, since the drive rod of the drive component inside the handle is detachably magnetically connected to the transducer inside the treatment head, the drive rod can quickly connect or disconnect from the transducer when the treatment head and handle are assembled or disassembled. This improves the convenience of assembling and disassembling the treatment head and handle, and allows for timely replacement when the treatment head or handle is damaged, avoiding the scrapping of the entire ultrasound therapy device and minimizing losses.

[0052] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An ultrasound therapy device with adjustable focal depth, characterized in that: The device includes a handle and a treatment head, the treatment head being detachably connected to the handle. The handle includes a housing and a drive assembly, the housing having a mounting cavity, and the drive assembly being disposed within the mounting cavity. The treatment head includes a housing, a cover, and a transducer. The housing has a receiving cavity, and the cover is sealed over the housing to seal the receiving cavity. The transducer is disposed inside the receiving cavity. The drive assembly has a drive rod capable of outputting linear displacement. The cover has a drive hole, and the drive rod passes through the drive hole in a sealed manner and is detachably magnetically connected to the transducer. The drive assembly drives the transducer to move linearly through the drive rod to adjust the focal depth of the transducer. The end face of the cover away from the housing is provided with a rotating buckle, and the end face of the housing near the treatment head is provided with a rotating slot corresponding to the position of the rotating buckle. The rotating buckle is inserted into the rotating slot to achieve a rotating engagement.

2. The ultrasound therapy device with adjustable focal depth according to claim 1, characterized in that, The cover has a protrusion on the end face near the transducer, the drive hole passes through the protrusion, a waterproof telescopic bladder is fitted on the protrusion, and the part of the drive rod that extends into the receiving cavity is set in the waterproof telescopic bladder. The transducer is provided with a first magnetic accumulator at the position corresponding to the drive rod, and the drive rod and the transducer are magnetically connected through the first magnetic accumulator. Alternatively, the end of the drive rod is provided with a second magnetic chuck, and the transducer is provided with a third magnetic chuck at a position corresponding to the drive rod, and the drive rod and the transducer are magnetically connected through the second magnetic chuck and the third magnetic chuck.

3. The ultrasound therapy device with adjustable focal depth according to claim 1, characterized in that, The rotating buckle includes a snap-fit ​​arm and a snap-fit ​​block, the snap-fit ​​block being disposed on the side of the free end of the snap-fit ​​arm; the rotating slot includes a receiving slot and a limiting block disposed within the receiving slot, the limiting block being connected to one long side wall of the receiving slot, the gap between the limiting block and one end side wall of the receiving slot forming an insertion port for the snap-fit ​​arm to be inserted into the receiving slot, the gap between the limiting block and the other long side wall of the receiving slot forming a guide groove for the snap-fit ​​arm to rotate, and the gap between the limiting block and the bottom wall of the receiving slot forming a receiving portion for receiving the snap-fit ​​block.

4. The ultrasound therapy device with adjustable focal depth according to claim 3, characterized in that, The end face of the cover away from the shell is also provided with a foolproof protrusion, and the end face of the shell near the treatment head is also provided with a foolproof groove. Only when the foolproof protrusion is inserted into the foolproof groove will the rotating buckle be inserted into the rotating slot to achieve rotational locking.

5. The ultrasound therapy device with adjustable focal depth according to claim 1, characterized in that, The inner wall of the housing is provided with a mounting base, the mounting base is provided with a guide shaft, the guide shaft is located on the outside of the transducer, and the outer wall of the transducer is provided with a guide shaft sleeve, the guide shaft sleeve being slidably fitted onto the guide shaft.

6. The ultrasound therapy device with adjustable focal depth according to claim 5, characterized in that, The transducer includes a mounting frame and a transducer unit. The guide sleeve is disposed on the outer side wall of the mounting frame. The mounting frame is provided with a mounting groove. The transducer unit is embedded in the mounting groove. The mounting frame is provided with a connecting part on the side near the cover. The drive rod is magnetically connected to the connecting part.

7. The ultrasound therapy device with adjustable focal depth according to claim 5, characterized in that, Two guide shafts are provided, which are respectively distributed on both sides of the transducer. The mounting base is provided with two fixing holes. One end of each guide shaft is inserted into the fixing hole. The cover is provided with a mounting hole and a fault-tolerant mounting hole at positions corresponding to the two fixing holes. The diameter of the fault-tolerant mounting hole is larger than the diameter of the mounting hole. The other end of each guide shaft is inserted into the mounting hole and the fault-tolerant mounting hole, respectively.

8. The ultrasound therapy device with adjustable focal depth according to claim 1, characterized in that, The mounting cavity is also equipped with a stroke control component, which includes a photoelectric switch and a sensing device. The photoelectric switch includes a start switch and an end switch. The start switch and the end switch are spaced apart on the inner side wall of the housing along the movement direction of the drive rod. The sensing device is mounted on the drive rod and located between the start switch and the end switch.

9. The ultrasound therapy device with adjustable focal depth according to claim 1, characterized in that, The cover is also provided with a pressure balancing device, which includes a retractable bladder. The sidewall of the retractable bladder is corrugated and has a vent. The sidewall of the cover is provided with a mounting body. The vent is sealed and fitted onto the mounting body. The mounting body has a connecting hole that communicates with the inner cavity of the retractable bladder. The retractable bladder is located in the receiving cavity or in the mounting cavity.

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