Handheld ultrasonic device

Abstract

The utility model relates to the technical field of battery temperature control, and discloses a handheld ultrasonic device which comprises a main machine, the main machine comprises a main machine shell and an ultrasonic control assembly, the ultrasonic control assembly is installed on the main machine shell, an installation groove is formed in the outer surface of the main machine shell, a first heat conduction piece is arranged in a containing cavity, and the first heat conduction piece is in heat conduction contact with the ultrasonic control assembly; a battery assembly is further included, and the battery assembly is detachably arranged in the mounting groove; the battery assembly comprises a battery shell and a battery cell, the battery cell is arranged in the battery shell, and the battery cell is electrically connected with the ultrasonic control assembly; the battery bin is filled with a phase change energy storage part, a second heat conduction part is installed on the surface, opposite to the main machine, of the battery shell, and the second heat conduction part is in heat conduction contact with the phase change energy storage part and the first heat conduction part; heat generated by the battery cell and the ultrasonic control assembly is absorbed through the phase change energy storage part, so that the overall temperature of the device is not prone to rising, hand holding is facilitated, the battery cell and the phase change energy storage part can be detached and replaced, and long-time work of the device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a handheld ultrasonic device. Background Art

[0002] At present, the existing handheld ultrasonic devices need to be used in conjunction with batteries. For the convenience of holding, the handheld devices are usually designed with a small size and a compact arrangement of components. Therefore, the heat dissipation capacity of the device itself is greatly reduced. When the power consumption of the electrical equipment is high or the use time is long, due to the poor overall heat dissipation performance of the device, the temperature of the device will rise. When the temperature is too high, the user cannot normally hold the electrical equipment for operation.

[0003] The existing heat dissipation methods for handheld electrical equipment include adding heat dissipation holes. This method will cause gaps on the surface of the electrical equipment, affecting the dust and waterproof performance and making it difficult to clean, and it is not easy to control the opening size. Another method is to install an internal fan. This method will generate noise and the fan needs to occupy a large volume, which is not convenient for holding. Therefore, the existing heat dissipation methods all have certain deficiencies and are not suitable for handheld electrical equipment with a short use time and high heat generation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a handheld ultrasonic device, which is small in size and can prevent the temperature of the device itself from rising easily without opening, facilitating holding; and can ensure that the electrical mechanism can be used for a long time.

[0005] To achieve the above purpose, the utility model provides a handheld ultrasonic device, which includes: a main unit, the main unit includes a main unit housing and an ultrasonic control component, the inside of the main unit housing has a receiving cavity, the ultrasonic control component is installed in the receiving cavity, a mounting groove is recessed on the outer surface of the main unit housing, a first heat conducting member is provided on the inner wall surface of the receiving cavity, and the first heat conducting member is in heat conducting contact with the ultrasonic control component;

[0006] It further includes a battery assembly, the battery assembly is detachably arranged in the mounting groove, and a battery connector electrically connected to the ultrasonic control component is arranged in the mounting groove; the battery assembly includes a battery housing and an electric core, the inside of the battery housing has a battery compartment, the electric core is arranged in the battery compartment, and the electric core is electrically connected to the battery connector; a phase change energy storage member is filled in the battery compartment, a second heat conducting member is installed on the surface of the battery housing opposite to the main unit, the second heat conducting member is in heat conducting contact with the phase change energy storage member, and the second heat conducting member is in heat conducting contact with the first heat conducting member.

[0007] Preferably, the main unit housing includes a bottom shell and an upper shell, the bottom shell has an opening, the upper shell covers the opening, and the mounting groove is opened on the upper shell.

[0008] Further, a through hole is formed in the upper shell. The first heat conducting member includes a first heat conducting plate and a second heat conducting plate. The first heat conducting plate is located in the accommodating cavity and is in heat conducting contact with the ultrasonic control assembly. The second heat conducting plate is disposed in the through hole, and the second heat conducting plate is in heat conducting contact with the second heat conducting member.

[0009] Preferably, an elastic clamping member is provided on the side wall of the upper shell facing the battery assembly. A clamping groove is formed in the side wall of the battery shell corresponding to the elastic clamping member. The elastic clamping member is cooperatively clamped in the clamping groove to realize the detachable connection between the battery assembly and the host.

[0010] Further, an anti-abrasion sheet is provided at the opening edge of the clamping groove.

[0011] Preferably, the host shell and / or the battery shell is / are made of ABS parts.

[0012] Preferably, the battery shell includes a main shell and a cover body. The cover body covers the main shell, and the cover body and the main shell enclose the battery compartment.

[0013] Further, the phase change energy storage member is a solid-liquid energy storage material or a solid-solid energy storage material. A material injection hole is formed in the main shell, and a sealing cover is provided on the material injection hole.

[0014] Preferably, the battery assembly further includes a charging port provided on the outer surface of the battery shell. The charging port is electrically connected to the battery cell.

[0015] Preferably, a wireless charging coil is further provided in the accommodating cavity. The wireless charging coil is electrically connected to the battery connector.

[0016] Compared with the prior art, the power supply electronic device according to the embodiment of the present invention has the beneficial effects that: by providing a phase change energy storage member in the battery compartment, the heat generated by the operation of the battery cell can be absorbed. The ultrasonic control assembly is in heat conducting contact with the phase change energy storage member through the first heat conducting member and the second heat conducting member, so that the heat generated when the ultrasonic control assembly works can also be conducted to the phase change energy storage member. The temperature of the phase change energy storage member rises relatively slowly, which can make the overall temperature of the device rise slowly, facilitating hand-held operation. And the battery assembly is detachably connected. When the phase change energy storage member stores too much heat, resulting in too high overall temperature of the device or the battery cell runs out of power, the battery assembly can be timely disassembled and replaced. The phase change energy storage member in the replaced battery compartment continues to absorb heat and supply power, reducing the overall temperature of the device and facilitating long-term use. Description of the Drawings

[0017] Figure 1 is an intuitive external structure view of the power supply electronic device according to the embodiment of the present invention.

[0018] Figure 2 It is an exploded view of the battery assembly of the power supply electronic device according to an embodiment of the present utility model.

[0019] Figure 3 It is an exploded view of the main body of the power supply electronic device according to an embodiment of the present utility model.

[0020] Figure 4 It is a cross-sectional view of the power supply electronic device at the injection hole according to an embodiment of the present utility model.

[0021] Figure 5 It is the Figure 4 enlarged view of part A in the power supply electronic device according to an embodiment of the present utility model.

[0022] Figure 6 It is a top view of the upper shell of the power supply electronic device according to an embodiment of the present utility model.

[0023] In the figure, 1 is the main body; 11 is the main body shell; 111 is the bottom shell; 112 is the upper shell; 1121 is the through port; 1122 is the elastic clamping member; 12 is the ultrasonic control component; 13 is the first heat conducting member; 131 is the first heat conducting plate; 132 is the second heat conducting plate; 14 is the battery connector; 15 is the wireless charging coil; 2 is the battery assembly; 21 is the battery shell; 211 is the card slot; 212 is the anti-abrasion sheet; 213 is the main shell; 2131 is the injection hole; 2132 is the sealing cover; 214 is the cover body; 215 is the light guide column; 22 is the battery cell; 23 is the second heat conducting member; 24 is the charging plate. Detailed implementation manners

[0024] The following will further describe in detail the detailed implementation manners of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] As Figures 1 - 6As shown in the figure, a handheld ultrasonic device according to a preferred embodiment of the present utility model includes: a main unit 1, the main unit 1 includes a main unit housing 11 and an ultrasonic control component 12. An accommodation cavity is provided inside the main unit housing 11, and the ultrasonic control component 12 is installed in the accommodation cavity. An installation groove is formed by the depression on the outer surface of the main unit housing 11. A first heat conducting member 13 is provided on the inner wall surface of the accommodation cavity, and the first heat conducting member 13 is in heat conducting contact with the ultrasonic control component 12;

[0027] It further includes a battery assembly 2. The battery assembly 2 is detachably arranged in the installation groove, and a battery connector 14 electrically connected to the ultrasonic control component 12 is provided in the installation groove; the battery assembly 2 includes a battery housing 21 and an electric core 22. A battery compartment is provided inside the battery housing 21, and the electric core 22 is arranged in the battery compartment. The electric core 22 is electrically connected to the battery connector 14; a phase change energy storage member (not shown in the figure) is filled in the battery compartment. A second heat conducting member 23 is installed on the surface of the battery housing 21 opposite to the main unit 1. The second heat conducting member is in heat conducting contact with the phase change energy storage member, and the second heat conducting member 23 is in heat conducting contact with the first heat conducting member 13.

[0028] Specifically, the ultrasonic control component 12 is installed inside the main unit housing 11. When power is supplied to the ultrasonic control component 12, the ultrasonic control component 12 can start to work. The main body structure of the ultrasonic control component 12 is a circuit board to reduce the volume of the device and facilitate handheld operation; an installation groove is formed by the depression on the outer surface of the main unit housing 11, and the battery assembly 2 is matched with the installation groove. When the battery assembly 2 is installed in the installation groove, the outer surface of the battery assembly 2 is smoothly transitioned with the outer surface of the main unit housing 11 to form an integral body, which is convenient for handheld operation; the battery connector 14 is arranged in the installation groove, and one end of it is electrically connected to the ultrasonic control component 12; the electric core 22 is arranged inside the battery housing 21, and the electric core 22 is electrically connected to the circuit inside the battery housing 21. A circuit interface is provided on the outside of the battery housing 21. When the battery assembly 2 is installed in the installation groove, the circuit interface on the battery housing 21 contacts the battery connector 14 in the installation groove, so that the electric core 22 is electrically connected to the ultrasonic control component 12 to form a circuit, and the electric core 22 supplies power to the ultrasonic control component 12. Preferably, a switch button is provided on the ultrasonic control component 12 to control the switch of the ultrasonic control component when the battery assembly 2 is installed in the installation groove;

[0029] The phase change energy storage component is disposed within the battery case 21 and is in contact with the battery cell 22. A material with a relatively large specific heat capacity is selected. When the battery cell 22 operates, heat is generated and directly conducted to the phase change energy storage component. The temperature rise of the phase change energy storage component is slow, which can effectively reduce the temperature of the battery cell 22 and prevent the temperature of the battery cell 22 from rising too quickly. The first heat conducting component 13 is disposed within the main body case 11 and is in contact with the ultrasonic control module 12. The second heat conducting component 23 is disposed on the surface of the battery case 21 and is in contact with the phase change energy storage component inside the battery case 21. Both the first heat conducting component 13 and the second heat conducting component 23 are made of materials with good heat conductivity. When the battery module 2 is installed in the installation groove, the second heat conducting component 23 and the first heat conducting component 13 are in contact with each other. The heat generated when the ultrasonic control module 12 operates is conducted to the phase change energy storage component through the first heat conducting component 13 and the second heat conducting component 23, which is used to reduce the temperature when the ultrasonic control module 12 operates and prevent the temperature of the ultrasonic control module 12 from rising, thereby ensuring that the overall temperature of the device does not rise easily and can be continuously used for a long time.

[0030] The battery module 2 is detachably installed in the installation groove. When the battery cell 22 runs out of power or the phase change energy storage component overheats, the battery module 2 can be removed and replaced with another battery module 2 with a charged battery cell 22 and a lower temperature, so that the device can continue to operate.

[0031] Through the above method, on the basis of not opening holes and with a relatively small overall volume of the device, the operating temperature of the handheld ultrasonic device can be effectively reduced, and the temperature is not likely to rise, which is convenient for handheld operation. In addition, the battery module is detachably installed, and can be replaced in time when the battery module 2 runs out of power or overheats, ensuring that the device can be used for a long time.

[0032] As Figure 1 、 Figure 3 and Figure 6 shown, preferably, the main body case 11 includes a bottom case 111 and an upper case 112. The bottom case 111 has an opening, and the upper case 112 covers the opening. The installation groove is formed on the upper case 112.

[0033] Specifically, the upper case 112 covers the installation groove. The upper case 112 has a groove structure, and the battery module 2 is installed in the groove formed by the upper case 112. The upper case 112 and the bottom case 111 are fixedly connected, which improves the overall stability and facilitates the disassembly and assembly of the battery module 2.

[0034] Furthermore, the upper case 112 is provided with a through hole 1121. The first heat conducting component 13 includes a first heat conducting plate 131 and a second heat conducting plate 132. The first heat conducting plate 131 is located within the accommodating cavity and is in heat conducting contact with the ultrasonic control module 12. The second heat conducting plate 132 is disposed within the through hole 1121, and the second heat conducting plate 132 is in heat conducting contact with the second heat conducting component 23.

[0035] Specifically, the second heat conduction plate 132 is installed inside the through port 1121, and the first heat conduction plate 131 is arranged in the accommodating cavity. One end of the first heat conduction plate 131 contacts the ultrasonic control component 12, and the other end contacts the bottom surface of the second heat conduction plate 132 facing the accommodating cavity. When the battery assembly 2 is installed in the installation groove, the other bottom surface of the second heat conduction plate 132 contacts the second heat conduction member 23, enabling the heat generated by the ultrasonic control component 12 to be conducted to the phase change energy storage member. By providing the second heat conduction plate 132 that connects the two sides of the upper shell 112, on the basis of ensuring heat conduction, the sealing performance of the upper shell 112 can be ensured without affecting the detachable function. The relevant heat conduction structure is located in the middle of the handheld ultrasonic device, and it will not be accidentally touched during holding, facilitating handheld operation.

[0036] As Figure 2 and Figure 3 shown, preferably, an elastic clamping member 1122 is provided on the side wall of the upper shell 112 facing the battery assembly 2, and a clamping groove 211 is provided on the side wall of the battery case 21 corresponding to the elastic clamping member 1122. The elastic clamping member 1122 is cooperatively clamped in the clamping groove 211 to realize the detachable connection between the battery assembly 2 and the host 1.

[0037] Specifically, the elastic clamping member 1122 is provided on the upper shell 112, and one end of the elastic clamping member 1122 located inside the upper shell 112 is connected to a spring and expands and contracts under the action of the spring. A clamping groove 211 is provided at the position of the battery case 21 corresponding to the elastic clamping member 1122. When the battery assembly 2 is installed inside the upper shell 112, the clamping groove 211 corresponds to the elastic clamping member 1122, and the elastic clamping member 1122 pops out and is clamped into the clamping groove 211, which can position the battery assembly 2 and prevent the battery assembly 2 from falling off easily. Preferably, a slider can be provided to manually adjust the expansion and contraction of the elastic clamping member 1122. When disassembling, the clamping of the elastic clamping member 1122 is released by manual adjustment, or by adjusting the elasticity of the spring. The side surface of the elastic clamping member 1122 has a relatively smooth structure. When the force applied to the battery assembly 2 away from the upper shell 112 is greater than a certain value, the edge of the clamping groove 211 can abut against the elastic clamping member 1122 to make the elastic clamping member 1122 contract, and the battery assembly 2 can be taken out, which facilitates the disassembly of the battery assembly 2 and ensures the stability of the installation of the battery assembly 2.

[0038] Furthermore, an anti-wear sheet 212 is provided at the opening edge of the clamping groove 211.

[0039] Specifically, the anti-wear sheet 212 is provided at the opening edge of the clamping groove 211, or can also be provided inside the clamping groove 211. The hardness of the anti-wear sheet 212 is less than that of the elastic clamping member 1122. When the elastic clamping member 1122 moves in the clamping groove 211, the elastic clamping member 1122 will not be worn, improving the service life of the elastic clamping member 1122. The anti-wear sheet 212 is detachably installed on the clamping groove 211, facilitating replacement after excessive wear.

[0040] Preferably, the main housing 11 and / or the battery housing 21 is / are made of ABS material.

[0041] Specifically, due to the low thermal conductivity of the ABS material, it can effectively prevent the heat of the first heat conducting member 13 and the second heat conducting member 23, as well as the heat generated by the ultrasonic control assembly 12 and the battery cell 22 from being conducted to the outer surface of the device, facilitating the user to hold and operate.

[0042] As Figure 2 and Figure 6 shown, preferably, the battery housing 21 includes a main housing 213 and a cover 214, the cover 214 is disposed on the main housing 213, and the cover 214 and the main housing 213 enclose a battery compartment.

[0043] Specifically, the main housing 213 is located below the battery cell 22. During installation, the main housing 213 abuts against the bottom of the groove at the installation groove. The cover 214 is disposed on the upper surface of the main housing 213. The cover 214 matches the outer contour of the main housing 11, increasing the comfort of holding. The main housing 213 and the cover 214 enclose to form a battery compartment, and the battery cell 22 and the phase change energy storage member are both disposed inside the enclosed compartment, making the battery assembly 2 form an integral structure, facilitating disassembly and installation.

[0044] Furthermore, the phase change energy storage member is a solid-liquid energy storage material or a solid-solid energy storage material. A filling hole 2131 is formed on the main housing 213, and a sealing cover 2132 is disposed on the filling hole 2131.

[0045] Specifically, a filling hole 2131 is formed on the main housing 213 for filling the phase change energy storage member into the battery housing 21 during the production of the device. After filling, a sealing cover 2132 is disposed at the filling hole 2131 to ensure the sealing of the battery housing 21, enabling the energy storage material to be formed, and ensuring that the phase change energy storage member inside the battery housing 21 cannot flow out of the battery housing 21 even when heated and melted.

[0046] Preferably, the battery assembly 2 further includes a charging port (not shown in the figure) disposed on the outer surface of the battery housing 21, and the charging port is electrically connected to the battery cell 22.

[0047] Specifically, the charging port is electrically connected to the battery cell 22. When the battery assembly 2 runs out of power, the battery assembly 2 is taken out of the installation groove, and the battery cell 22 is charged by connecting to the power supply through the charging port, facilitating replacement next time, and the charging process does not affect the normal use of the device.

[0048] As Figure 3 shown, preferably, a wireless charging coil 15 is further disposed in the accommodation cavity, and the wireless charging coil 15 is electrically connected to the battery connector 14.

[0049] Specifically, the wireless charging coil 15 is disposed in the accommodating cavity of the main housing 11. The wireless charging coil 15 is electrically connected to the battery cell 22 through the battery connector 14. When the battery assembly 2 is installed in the installation groove, the ultrasonic control component 12 is turned off, and the whole device is placed on the wireless charging stand. The wireless charging coil 15 generates current and charges the battery cell 22 through the battery connector 14, enabling the battery assembly 2 to be charged when installed in the installation groove, greatly improving the practicability of the device.

[0050] In addition, the battery assembly 2 further includes a charging board 24 disposed in the battery compartment. The battery cell 22 is electrically connected to the charging board 24, and the battery cell 22 is electrically connected to the battery connector 14 through the charging board 24. The charging board 24 abuts against the upper surface of the battery cell 22 to fix the battery cell 22 and prevent the displacement of the battery cell caused by the movement of the battery assembly 2.

[0051] Furthermore, the battery assembly 2 further includes an indicator light for indicating the charging status of the battery assembly 2. When the battery assembly 2 is charging, the indicator light lights up. A light guide column 215 is provided on the outer surface of the battery case 21, and the lower end of the light guide column 215 is connected to the indicator light, which is convenient for observing the light of the indicator light from the outside.

[0052] The working process of the present utility model is as follows: When using the device, a battery assembly 2 is installed in the installation groove, and the manual adjustment or the elastic clamping member 1122 is automatically clamped in the clamping groove 211 on the battery case 21 to ensure that the battery assembly 2 is installed in place and not easily detached. At this time, the battery cell 22 is connected to the circuit of the ultrasonic control component 12.

[0053] The switch of the ultrasonic control component 12 is turned on, and the ultrasonic control component 12 starts to work. During the working process, the heat generated by the battery cell 22 is directly conducted to the phase change energy storage member with a relatively low temperature, so that the temperature of the battery cell 22 is not easily increased. The heat generated by the ultrasonic control component 12 during operation is conducted to the phase change energy storage member through the first heat conducting member 13 and the second heat conducting member 23, so that the overall temperature of the device is not easily increased.

[0054] When the temperature of the phase change energy storage member rises to a temperature that is not suitable for holding due to the long-term use of the ultrasonic control component 12, or when the battery cell 22 runs out of power, the overheated battery assembly 2 can be manually disassembled and replaced with another battery assembly to enable the ultrasonic control component 12 to continue working. By directly replacing the battery assembly 2, the ultrasonic control component 12 and the battery assembly 2 are always at a temperature suitable for holding, and it can be applied to handheld electrical devices.

[0055] If the battery cell 22 of the replaced battery assembly 2 has a low power, the battery cell 22 can be charged through the charging port to ensure that the spare replaceable battery assembly 2 is in a charged and replaceable state.

[0056] In summary, the embodiment of the present utility model provides a handheld ultrasonic device. The phase change energy storage component disposed in the battery assembly 2 absorbs the heat generated by the operation of the battery cell 22, and the heat generated by the ultrasonic control component 12 is conducted to the phase change energy storage component through the first heat conducting member 13 and the second heat conducting member 23, slowing down the overall heating rate of the device and facilitating handheld use. Moreover, by setting the battery assembly 2 as a detachable structure, the phase change energy storage component can be replaced in time when it overheats, enabling the device to cool down to a handheld temperature again and ensuring that the ultrasonic control component 12 maintains a low-temperature usage state. The main unit 1 and the battery assembly 2 adopt an integrated design, without the need for opening holes or installing large-sized heat dissipation devices, effectively reducing the volume and facilitating handheld use.

[0057] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present utility model, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present utility model.

Claims

1. A handheld ultrasonic device, characterized in that: The main machine comprises a main housing and an ultrasonic control component, wherein the main housing has a housing cavity inside, the ultrasonic control component is installed in the housing cavity, the outer surface of the main housing is concave to form a mounting groove, a first heat conducting member is provided on the inner wall surface of the housing cavity, and the first heat conducting member is in thermal contact with the ultrasonic control component; It also includes a battery assembly, which is detachably arranged in the installation groove, and a battery connector electrically connected to the ultrasonic control assembly is arranged in the installation groove; the battery assembly includes a battery shell and a battery cell, the battery shell has a battery compartment, the battery cell is arranged in the battery compartment, and the battery cell is electrically connected to the battery connector; the battery compartment is filled with a phase change energy storage component, and a second heat conductive component is installed on the surface of the battery shell opposite to the main unit, the second heat conductive component is in thermal contact with the phase change energy storage component, and the second heat conductive component is in thermal contact with the first heat conductive component.

2. The handheld ultrasonic device according to claim 1, characterized in that: The main housing comprises a bottom housing and an upper housing, wherein the bottom housing has an opening, the upper housing covers the opening, and the mounting groove is formed on the upper housing.

3. The handheld ultrasonic device according to claim 2, wherein: The upper shell is provided with a through opening, the first heat-conducting member includes a first heat-conducting plate and a second heat-conducting plate, the first heat-conducting plate is located in the accommodating cavity and is in thermal contact with the ultrasonic control component, the second heat-conducting plate is located in the through opening, and the second heat-conducting plate is in thermal contact with the second heat-conducting member.

4. The handheld ultrasonic device according to claim 2, wherein: An elastic clamping piece is provided on the side wall of the upper shell facing the battery assembly, and a slot is provided on the side wall of the battery shell corresponding to the elastic clamping piece. The elastic clamping piece is engaged in the slot to achieve a detachable connection between the battery assembly and the host.

5. The handheld ultrasonic device according to claim 4, characterized in that: An anti-wear sheet is provided at the opening edge of the slot.

6. The handheld ultrasonic device according to claim 1, wherein: The main housing and / or the battery housing are made of ABS.

7. The handheld ultrasonic device according to claim 1, wherein: The battery shell comprises a main shell and a cover body, wherein the cover body is disposed on the main shell, and the cover body and the main shell enclose the battery compartment.

8. The handheld ultrasonic device according to claim 7, wherein: The phase change energy storage component is a solid-liquid energy storage material or a solid-solid energy storage material. A material injection hole is provided on the main shell, and a sealing cover is provided on the material injection hole.

9. The handheld ultrasonic device according to claim 1, wherein: The battery assembly also includes a charging port disposed on the outer surface of the battery shell, and the charging port is electrically connected to the battery cell.

10. The handheld ultrasonic device according to any one of claims 1 to 9, characterized in that: A wireless charging coil is also provided in the accommodating cavity, and the wireless charging coil is electrically connected to the battery connector.

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