Handheld device of ultrasonic therapeutic apparatus

Abstract

The utility model discloses a hand-held device of an ultrasonic therapeutic apparatus, comprising a housing, one end of which is provided with an ultrasonic energy output window; the limiting frame is fixedly arranged in the shell, the limiting frame comprises a first base disc, a second base disc and a connecting rod connected between the first base disc and the second base disc, a first limiting hole is formed in the first base disc, and a second limiting hole is formed in the second base disc; the rotating shaft is rotatably arranged in the first limiting hole and the second limiting hole in a penetrating mode, and a first end face gear is arranged at one end of the rotating shaft; the ultrasonic transducer probe is connected to the rotating shaft and located at the eccentric position of the rotating center of the rotating shaft so as to output ultrasonic energy along the circumferential movement track; and the driver is connected with a rotatable rotating body, the rotating body is provided with a second end face gear, and the second end face gear is meshed with the first end face gear. And the rotating shaft is limited through the first base disc and the second base disc on the limiting frame, so that the rotating shaft is prevented from shaking during rotation.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic therapeutic equipment, in particular to a handheld device of an ultrasonic therapeutic instrument. Background Art

[0002] Currently, there are ultrasound therapeutic devices that can treat obesity. Ultrasound therapeutic devices use high-intensity focused ultrasound (HIFU) to destroy fat. The process is that when the ultrasound is directly focused on a certain position of the fat cells, the tissue temperature instantly rises to 65°C to 100°C, thereby destroying the tissue. HIFU devices are different from other dermatological devices such as lasers and RF high-frequency devices. They do not cause damage to the skin surface, and focus HIFU energy on the selected parts in a non-invasive form to induce fat coagulation necrosis. The necrotic fat cells are naturally removed through the body's own damage recovery mechanism.

[0003] Current ultrasonic therapeutic devices include, for example, "A therapeutic ultrasonic wave generating device and an ultrasonic therapeutic handpiece including the same" with Chinese patent publication number CN114828957A, in which a motor drives a probe (ultrasonic transducer) to rotate through a transmission structure, so that the focus of the ultrasonic wave forms a circle with a certain radius at a certain depth in the skin, and energy is applied evenly within the radius, thereby achieving a therapeutic effect; however, its transmission structure has a large transmission gap, which is prone to jitter, so that the trajectory of the circle formed by the focus of the ultrasonic wave is not accurate enough, which is not convenient for precise dotting during treatment. Utility Model Content

[0004] In view of this, the utility model provides a handheld device of an ultrasonic therapeutic apparatus, aiming to solve the problem that the probe of the existing ultrasonic therapeutic apparatus is prone to shaking.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A handheld device of an ultrasonic therapeutic apparatus, comprising:

[0007] A shell, one end of which is provided with an ultrasonic energy output window;

[0008] A limit frame, which is fixedly arranged inside the shell, the limit frame includes a first base plate, a second base plate and a connecting rod connected between the first base plate and the second base plate, the first base plate is provided with a first limit hole, and the second base plate is provided with a second limit hole;

[0009] A rotating shaft, which is rotatably inserted into the first limiting hole and the second limiting hole, and one end of the rotating shaft is provided with a first end face gear;

[0010] an ultrasonic transducer probe connected to the rotating shaft and located at an eccentric position of the rotation center of the rotating shaft to output ultrasonic energy along a circular movement trajectory;

[0011] The driver is connected with a rotatable rotating body, the rotating body is provided with a second end face gear, and the second end face gear is meshed with the first end face gear.

[0012] As a further optional solution of the handheld device of the ultrasonic therapeutic apparatus, the shell includes a first shell and a second shell;

[0013] The limiting frame, the rotating shaft and the ultrasonic transducer probe are arranged in the first shell, the ultrasonic energy output window is arranged at one end of the first shell, and the first end face gear is arranged at the other end of the first shell;

[0014] The driver and the rotating body are arranged in the second shell, a first circuit board is also arranged in the second shell, a second end face gear of the rotating body is arranged at one end of the second shell, and the first shell and the second shell are detachably connected.

[0015] As a further optional solution for the handheld device of the ultrasonic therapeutic instrument, a sealed connection is formed between the first base and the first shell, a sealing ring is provided between the first limiting hole of the first base and the rotating shaft, a diaphragm is adhered to the ultrasonic energy output window, a sealed cavity is formed between the first shell, the first base and the diaphragm, and a medium for transmitting ultrasonic energy is provided in the sealed cavity.

[0016] As a further optional solution of the handheld device of the ultrasonic therapeutic apparatus, a first buckle structure is provided on the first shell, and a second buckle structure is provided on the second shell, and the first buckle structure is buckled with the second buckle structure;

[0017] The driver transmission is connected with a rotation transmission member, the cross-section of the rotation transmission member is a non-circular structure, the rotating body is provided with a socket for inserting the rotation transmission member, the second shell is provided with an elastic member for applying a force to the rotating body to approach the rotating shaft, and the rotating body is provided with a limit ring to prevent it from detaching from the second shell.

[0018] As a further optional solution of the handheld device of the ultrasonic therapeutic apparatus, the elastic member is a spring and the driver is a motor.

[0019] As a further optional solution of the handheld device of the ultrasonic therapeutic apparatus, a second circuit board and an end cover are provided in the first shell, the second circuit board is arranged outside the sealed cavity, a wire hole is provided on the first base plate, and the second circuit board is electrically connected to the ultrasonic transducer probe;

[0020] A support column is provided on the end surface of the first base away from the second base, a first connection hole is opened on the end surface of the support column, a second connection hole is provided on the second circuit board, a third connection hole is provided on the end cover, and the first connection hole, the second connection hole and the third connection hole are locked by screws;

[0021] The second circuit board is provided with a first avoidance hole, the end cover is provided with a second avoidance hole, and the first end face gear of the rotating shaft passes through the first avoidance hole and the second avoidance hole;

[0022] The second circuit board is provided with a first signal connection port, the end cover is provided with an opening for exposing the first signal connection port, and the second housing is provided with a second signal connection port.

[0023] As a further optional solution for the handheld device of the ultrasonic therapeutic apparatus, a supporting step is provided on the inner wall of the first shell, and a protrusion is also provided on the inner wall of the first shell, and the first base plate is clamped between the supporting step and the protrusion.

[0024] As a further optional solution for the handheld device of the ultrasonic therapeutic apparatus, the outer peripheral wall of the first base is provided with a bayonet, and the inner wall of the first shell is protrudingly provided with a block, and the block is clamped in the bayonet to prevent the first base from rotating.

[0025] As a further optional scheme for the handheld device of the ultrasonic therapeutic device, the rotating shaft includes a first shaft body and a second shaft body, the first shaft body is provided with a first limiting step, the second shaft body is provided with a second limiting step, the first limiting step abuts against the port of the first limiting hole away from the second base plate, and the second limiting step abuts against the port of the second limiting hole away from the first base plate; the first shaft body and the second shaft body are fixedly connected.

[0026] As a further optional solution for the handheld device of the ultrasonic therapeutic apparatus, the first shell and the second shell are in the shape of long strips, and gripping parts are recessed on both sides of the first shell, and a plurality of friction protrusions are provided on the gripping parts.

[0027] Compared with the prior art, the handheld device of the ultrasonic therapeutic instrument of the utility model limits the rotating shaft by the first base plate and the second base plate on the limit frame to prevent the rotating shaft from shaking during rotation; at the same time, the rotating shaft and the rotating body are transmitted by the first end gear and the second end gear. Even if the rotating body and the driver shake, the torque can be transmitted to the rotating shaft to rotate the rotating shaft without causing the rotating shaft to shake, thereby maintaining the stability of the ultrasonic transducer probe on the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a structural schematic diagram of a handheld device of an ultrasonic therapeutic apparatus of the utility model;

[0030] Figure 2 This is one of the exploded schematic diagrams of a handheld device of an ultrasonic therapeutic apparatus of the utility model;

[0031] Figure 3 This is the second explosion diagram of a handheld device of an ultrasonic therapeutic apparatus of the utility model;

[0032] Figure 4 It is a cross-sectional schematic diagram of a handheld device of an ultrasonic therapeutic apparatus of the utility model;

[0033] Figure 5 for Figure 4 A magnified view of middle;

[0034] Figure 6 is an exploded schematic diagram of the limit frame and the rotating shaft;

[0035] Figure 7 is an exploded schematic diagram of the driver and the rotating body;

[0036] Figure 8 It is an exploded schematic diagram of the first base, the second circuit board and the end cover.

[0037] In the figure: 1, housing; 11, first housing; 111, ultrasonic energy output window; 112, bump; 113, support step; 114, sealing cavity; 115, gripping portion; 116, friction bump; 12, second housing; 121, second signal connection port; 122, second buckle structure;

[0038] 2. Limiting frame; 21. First base plate; 211. First limiting hole; 212. Wire hole; 213. Clamp; 214. Support column; 215. First connecting hole; 22. Second base plate; 221. Second limiting hole; 23. Connecting rod;

[0039] 3. Rotating shaft; 31. First shaft body; 311. First limiting step; 32. Second shaft body; 321. Second limiting step; 33. First end face gear; 34. Pin;

[0040] 4. Ultrasonic transducer probe;

[0041] 5. driver; 51. rotating body; 511. second end face gear; 512. jack; 52. rotation transmission member; 53. elastic member;

[0042] 6. The first circuit board;

[0043] 7. second circuit board; 71. first signal connection port; 72. second connection hole; 73. first avoidance hole;

[0044] 8. End cover; 81. First buckle structure; 82. Third connecting hole; 83. Second avoidance hole;

[0045] 9. Sealing ring. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] refer to Figure 1-8 , shows a handheld device of an ultrasonic therapeutic apparatus, including a housing 1, a limit frame 2, a rotating shaft 3, an ultrasonic transducer probe 4 and a driver 5;

[0051] An ultrasonic energy output window 111 is provided at one end of the shell 1, and the shell 1 is fixedly arranged inside the shell 1. The limit frame 2 includes a first base plate 21, a second base plate 22 and a connecting rod 23 connected between the first base plate 21 and the second base plate 22. The first base plate 21 is provided with a first limit hole 211, and the second base plate 22 is provided with a second limit hole 221; the rotating shaft 3 is rotatably inserted into the first limit hole 211 and the second limit hole 221, and a first end face gear 33 is provided at one end of the rotating shaft 3; the ultrasonic transducer probe 4 is connected to the rotating shaft 3 and is located at an eccentric position of the rotation center of the rotating shaft 3 to output ultrasonic energy along a circular movement trajectory; the driver 5 is connected to a rotatable rotating body 51, and the rotating body 51 is provided with a second end face gear 51, and the second end face gear 51 is meshed with the first end face gear 33.

[0052] Specifically, the rotating shaft 3 is limited by the first base plate 21 and the second base plate 22 on the limit frame 2 to prevent the rotating shaft 3 from shaking during rotation; at the same time, the rotating shaft 3 and the rotating body 51 are transmitted through the first end face gear 33 and the second end face gear 51. Even if the rotating body 51 and the driver 5 shake, the torque can be transmitted to the rotating shaft 3 to rotate the rotating shaft 3 without causing the rotating shaft 3 to shake, thereby maintaining the stability of the ultrasonic transducer probe 4 on the rotating shaft 3.

[0053] Conventionally, according to the prior art, the shell 1 should have a closed structure filled with a medium for transmitting ultrasonic energy so that the ultrasonic transducer probe 4 outputs the ultrasonic energy from the ultrasonic energy output window 111; the medium can be water, and in addition, various known ultrasonic transmission media can be used.

[0054] In some embodiments, in order to facilitate the replacement of different types of ultrasonic transducer probes 4 or media, refer to Figure 2 and Figure 3 The shell 1 includes a first shell 11 and a second shell 12; the limit frame 2, the rotating shaft 3 and the ultrasonic transducer probe 4 are arranged in the first shell 11, the ultrasonic energy output window 111 is arranged at one end of the first shell 11, and the first end face gear 33 is arranged at the other end of the first shell 11; the driver 5 and the rotating body 51 are arranged in the second shell 12, and the second shell 12 is also provided with a first circuit board 6, the second end face gear 51 of the rotating body 51 is arranged at one end of the second shell 12, and the first shell 11 and the second shell 12 are detachably connected.

[0055] Specifically, it can be known from the existing technology (for example, the Chinese patent with publication number CN114828957A) that the handheld device is connected to the therapeutic device body (not shown) through a cable. In this embodiment, the second shell 12 is connected to the therapeutic device body through a cable, and the first circuit board 6 is electrically connected to the therapeutic device body. The first shell 11 can be removed and separated from the second shell 12 so as to perform replacement, maintenance and other operations on the first shell 11.

[0056] For more details on the above scheme, refer to Figure 5 The first base plate 21 is sealed with the first housing 11, a sealing ring 9 is provided between the first limiting hole 211 of the first base plate 21 and the rotating shaft 3, a diaphragm (not shown) is attached to the ultrasonic energy output window 111, a sealed cavity 114 is formed between the first housing 11, the first base plate 21 and the diaphragm, and a medium for transmitting ultrasonic energy is provided in the sealed cavity 114. The material of the diaphragm may include but is not limited to a PI film.

[0057] In some embodiments, a first snap-fit ​​structure 81 is provided on the first shell 11, and a second snap-fit ​​structure 122 is provided on the second shell 12, and the first snap-fit ​​structure 81 is snap-connected with the second snap-fit ​​structure 122; thereby achieving detachable separation of the first shell 11 and the second shell 12. Of course, the first snap-fit ​​structure 81 may not be directly provided on the first shell 11, but may be provided on a component fixed to the first shell 11, which is equivalent to the first snap-fit ​​structure 81 being indirectly provided on the first shell 11; the same is true for the second snap-fit ​​structure 122 on the second shell 12.

[0058] In addition, in the process of assembling the first housing 11 and the second housing 12, in order to ensure that the first end face gear 33 and the second end face gear 51 can be effectively connected, refer to Figure 2 , Figure 3 , Figure 5 and Figure 7 , the driver 5 is connected to the rotating transmission member 52 in a transmission manner, the cross section of the rotating transmission member is a non-circular structure, the rotating body 51 is provided with a plug hole 512 for inserting the rotating transmission member, the second housing 12 is provided with an elastic member 53 for applying a force to the rotating body 51 to approach the rotating shaft 3, and the rotating body 51 is provided with a limit ring to prevent it from being separated from the second housing 12. Specifically, when the first housing 11 is installed on the second housing 12, the first end face gear 33 and the second end face gear 51 may not be in a meshing state at this time (that is, the tooth peak of the first end face gear 33 does not correspond to the tooth groove of the second end face gear 51), the first end face gear 33 will push the second end face gear 51 into the second housing 12, so that the first buckle structure 81 and the second buckle structure 122 can be connected smoothly, and under the action of the elastic member 53, the second end face gear 51 will push the first end face gear 33, so that the first end face gear 33 rotates to achieve meshing with the second end face gear 51.

[0059] Specifically, the elastic member 53 is a spring, and the driver 5 is a motor.

[0060] More specifically, since the first shell 11 and the second shell 12 are detachable structures, in order to enable the first circuit board 6 to transmit the signal of the therapeutic device body to the ultrasonic transducer probe 4, reference Figure 5 , Figure 6 and Figure 8A second circuit board 7 and an end cover 8 are provided in the first shell 11, and the second circuit board 7 is arranged outside the sealed cavity 114. A wire hole 212 is provided on the first base plate, and the second circuit board 7 is electrically connected to the ultrasonic transducer probe 4; a first signal connection port 71 is provided on the second circuit board 7, and an opening is provided on the end cover 8 for the first signal connection port 71 to be exposed, and a second signal connection port 121 is provided on the second shell 12, and the second signal connection port 121 is electrically connected to the first circuit board 6. When the first shell 11 and the second shell 12 are connected, the first signal connection port 71 and the second signal connection port 121 are connected to realize the electrical connection between the first circuit board 6 and the second circuit board 7. It should be noted that the circuit structure adopted in the utility model is a known circuit structure of the existing ultrasonic therapeutic device, and the utility model does not involve innovative improvements to the circuit structure.

[0061] In addition, to ensure that the second circuit board 7 is stably arranged in the first housing 11, refer to Figure 8 A support column 214 is provided on the end face of the first base plate 21 away from the second base plate 22, and a first connecting hole 215 is opened on the end face of the support column 214. A second connecting hole 72 is provided on the second circuit board 7, and a third connecting hole 82 is provided on the end cover 8. The first connecting hole 215, the second connecting hole 72 and the third connecting hole 82 are locked by screws (not shown); a first avoidance hole 73 is provided on the second circuit board 7, and a second avoidance hole 83 is provided on the end cover 8. The first end face gear 33 of the rotating shaft 3 passes through the first avoidance hole 73 and the second avoidance hole 83.

[0062] In some embodiments, in order to facilitate the fixing of the limiting frame 2 in the first housing 11, refer to Figure 3 and Figure 5 , a support step 113 is provided on the inner wall of the first shell 11, a convex block 112 is also provided on the inner wall of the first shell 11, and the first base plate 21 is clamped between the support step 113 and the convex block 112. In this way, the first base plate 21 is clamped by the support step 113 and the convex block 112 to achieve the axial fixation of the limit frame 2; wherein, a sealant can be applied between the first base plate 21 and the inner wall of the first shell 11 to achieve sealing; in addition, refer to Figure 8 The outer peripheral wall of the first base plate 21 is provided with a bayonet 213, and the inner wall of the first shell 11 is provided with a block (not shown), which is locked in the bayonet 213 to prevent the first base plate 21 from rotating. In this way, the limiting frame 2 can be fixed in the circumferential direction to prevent the rotation shaft 3 from driving the limiting frame 2 to rotate, thereby preventing the limiting function of the rotation shaft 3 from being lost.

[0063] In some embodiments, in order to achieve the axial fixation of the rotating shaft 3 on the limiting frame 2, refer to Figure 5 and Figure 6 The rotating shaft 3 includes a first shaft body 31 and a second shaft body 32. The first shaft body 31 is provided with a first limiting step 311, and the second shaft body 32 is provided with a second limiting step 321. The first limiting step 311 abuts against the end of the first limiting hole 211 away from the second base plate 22, and the second limiting step 321 abuts against the end of the second limiting hole 221 away from the first base plate 21. The first shaft body 31 and the second shaft body 32 are fixedly connected. The first shaft body 31 can be inserted from the top of the first base plate 21, and the second shaft body 32 can be inserted from the bottom of the second base plate 22. The first shaft body 31 and the second shaft body 32 are fixed by a pin 34, so as to realize the installation of the rotating shaft 3 on the limiting frame 2. The first limiting step 311 and the second limiting step 321 can prevent the rotating shaft 3 from moving axially on the limiting frame 2.

[0064] In some embodiments, reference Figure 1-3 The first shell 11 and the second shell 12 are in the shape of long strips, and gripping parts 115 are recessed on both sides of the first shell 11 for gripping; and a plurality of friction protrusions 116 are provided on the gripping parts 115 to prevent slipping.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A handheld device for an ultrasonic therapeutic apparatus, characterized in that: include: A shell, one end of which is provided with an ultrasonic energy output window; A limit frame, which is fixedly arranged inside the shell, the limit frame includes a first base plate, a second base plate and a connecting rod connected between the first base plate and the second base plate, the first base plate is provided with a first limit hole, and the second base plate is provided with a second limit hole; A rotating shaft, which is rotatably inserted into the first limiting hole and the second limiting hole, and one end of the rotating shaft is provided with a first end face gear; an ultrasonic transducer probe connected to the rotating shaft and located at an eccentric position of the rotating shaft's rotation center to output ultrasonic energy along a circular movement trajectory; The driver is connected with a rotatable rotating body, the rotating body is provided with a second end face gear, and the second end face gear is meshed with the first end face gear.

2. The handheld device of the ultrasonic therapeutic apparatus according to claim 1, characterized in that: The housing comprises a first housing and a second housing; The limiting frame, the rotating shaft and the ultrasonic transducer probe are arranged in the first shell, the ultrasonic energy output window is arranged at one end of the first shell, and the first end face gear is arranged at the other end of the first shell; The driver and the rotating body are arranged in the second shell, a first circuit board is also arranged in the second shell, a second end face gear of the rotating body is arranged at one end of the second shell, and the first shell and the second shell are detachably connected.

3. The handheld device of the ultrasonic therapeutic apparatus according to claim 2, characterized in that: A sealed connection is formed between the first base and the first shell, a sealing ring is provided between the first limiting hole of the first base and the rotating shaft, a diaphragm is pasted on the ultrasonic energy output window, a sealed cavity is formed between the first shell, the first base and the diaphragm, and a medium for transmitting ultrasonic energy is provided in the sealed cavity.

4. The handheld device of the ultrasonic therapeutic apparatus according to claim 3, characterized in that: The first shell is provided with a first buckle structure, the second shell is provided with a second buckle structure, and the first buckle structure is buckled with the second buckle structure; The driver transmission is connected with a rotation transmission member, the cross-section of the rotation transmission member is a non-circular structure, the rotating body is provided with a socket for inserting the rotation transmission member, the second shell is provided with an elastic member for applying a force to the rotating body to approach the rotating shaft, and the rotating body is provided with a limit ring to prevent it from detaching from the second shell.

5. The handheld device of the ultrasonic therapeutic apparatus according to claim 4, characterized in that: The elastic member is a spring, and the driver is a motor.

6. The handheld device of the ultrasonic therapeutic apparatus according to claim 3, characterized in that: A second circuit board and an end cover are provided in the first shell, the second circuit board is arranged outside the sealed cavity, a wire hole is provided on the first base plate, and the second circuit board is electrically connected to the ultrasonic transducer probe; a support column is provided on the end surface of the first base plate away from the second base plate, a first connecting hole is opened on the end surface of the support column, a second connecting hole is provided on the second circuit board, and a third connecting hole is provided on the end cover, and the first connecting hole, the second connecting hole and the third connecting hole are locked by screws; The second circuit board is provided with a first avoidance hole, the end cover is provided with a second avoidance hole, and the first end face gear of the rotating shaft passes through the first avoidance hole and the second avoidance hole; The second circuit board is provided with a first signal connection port, the end cover is provided with an opening for exposing the first signal connection port, and the second housing is provided with a second signal connection port.

7. The handheld device of the ultrasonic therapeutic apparatus according to claim 3, characterized in that: A supporting step is provided on the inner wall of the first shell, and a convex block is also provided on the inner wall of the first shell. The first base plate is clamped between the supporting step and the convex block.

8. The handheld device of the ultrasonic therapeutic apparatus according to claim 7, characterized in that: The outer peripheral wall of the first base is provided with a bayonet, and the inner wall of the first shell is protrudingly provided with a clamping block, and the clamping block is clamped in the bayonet to prevent the first base from rotating.

9. The handheld device of the ultrasonic therapeutic apparatus according to any one of claims 1 to 8, characterized in that: The rotating shaft includes a first shaft body and a second shaft body, the first shaft body is provided with a first limiting step, the second shaft body is provided with a second limiting step, the first limiting step abuts against the end of the first limiting hole away from the second base plate, the second limiting step abuts against the end of the second limiting hole away from the first base plate; the first shaft body and the second shaft body are fixedly connected.

10. The handheld device of the ultrasonic therapeutic apparatus according to claim 2, characterized in that: The first shell and the second shell are in the shape of long strips. Gripping parts are concavely provided on both sides of the first shell. A plurality of friction protrusions are provided on the gripping parts.

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