Packaging structure, ultrasonic head and handheld ultrasonic equipment

Abstract

The utility model provides a packaging structure and an ultrasonic head. The packaging structure comprises a first shell, the first shell is provided with a first end and a second end which are opposite to each other, and the position, close to the first end, of the first shell is provided with an annular protruding part and a first limiting part; the second shell is provided with a third end and a fourth end which are opposite, the second shell is further provided with a channel penetrating through the third end and the fourth end, the third end is provided with a protruding part protruding towards the interior of the channel, the protruding part is provided with a first surface wall facing one side of the fourth end, and second limiting parts are arranged at the position close to the fourth end at intervals in the circumferential direction; the second limiting part is provided with a second surface wall facing one side of the third end; the first sealing ring is arranged on the outer wall of the first shell in a sleeving mode and arranged on one side of the annular protruding part. And the first shell can rotate from the initial assembly position to the target assembly position relative to the second shell, so that the first limiting part enters a space between the first surface wall and the second surface wall.

Description

Technical Field

[0001] The utility model relates to the field of packaging, and in particular to a packaging structure, an ultrasonic head and a handheld ultrasonic device. Background Art

[0002] Ultrasonic head packaging structures generally require a high waterproof rating, making sealing crucial during assembly. Currently, to achieve a good seal, these packaging structures are often complex and rely primarily on glue injection, resulting in a cumbersome assembly process and poor sealing performance. Utility Model Content

[0003] The purpose of the utility model is to provide a packaging structure and an ultrasonic head, the sealing and assembling process of which is simple.

[0004] One embodiment of the present invention provides a packaging structure, comprising: a first shell, the first shell having an outer wall, the first shell having a first end and a second end opposite to each other in an axial direction of the first shell, the outer wall being provided with an annular protrusion extending in a circumferential direction near the first end, and first limiting portions arranged at intervals, the first limiting portions protruding relative to the annular protrusion in a direction away from the outer wall;

[0005] A second shell, wherein the second shell has a third end and a fourth end opposite to each other along the axial direction of the second shell, the second shell further has a channel passing through the third end and the fourth end, the channel having an inner wall, the third end being provided with a protrusion extending in a circumferential direction and protruding toward the interior of the channel, the protrusion having a first surface wall facing the fourth end, the inner wall being provided with second limiting portions spaced apart in the circumferential direction near the fourth end, the second limiting portions extending in the circumferential direction, and the second limiting portions having a second surface wall facing the third end;

[0006] a first sealing ring, the first sealing ring being sleeved on the outer wall and placed on one side of the annular protrusion;

[0007] wherein, an escape area is formed between adjacent first limiting portions; the first shell is placed in the channel and has an initial assembly position and a target assembly position relative to the second shell; in the initial assembly position, the second limiting portion and the escape area are arranged vertically in the axial direction and horizontally in the radial direction; at least a portion of the first end of the first shell is exposed to the outside of the second shell; the first shell can be rotated relative to the second shell from the initial assembly position to the target assembly position so that the first limiting portion enters between the first surface wall and the second surface wall;

[0008] In the target assembly position, the first limiting portion is located between the first surface wall and the second surface wall, and the first sealing ring is compressed between the first surface wall and the first limiting portion.

[0009] As a further improvement of an embodiment of the present invention, at the target assembly position, the first limiting portion has a lower surface wall opposite to the first surface wall, and the first surface wall and the lower surface wall are both continuous surfaces.

[0010] As a further improvement of an embodiment of the present invention, the first shell is a metal shell.

[0011] As a further improvement of an embodiment of the present invention, the first limiting portion has an outer circumferential wall, and the outer circumferential walls of multiple first limiting portions are located on the same circumferential surface.

[0012] As a further improvement of one embodiment of the present invention, the annular protrusion and the first limiting portion are integrally formed, and the lower surface wall of the annular protrusion and the lower surface wall of the first limiting portion are located in the same plane, and the upper surface wall of the annular protrusion and the upper surface wall of the first limiting portion are located in the same plane, wherein, in the target assembly position, the lower surface wall of the annular protrusion is in elastic contact with the first sealing ring, and the upper surface wall of the first limiting portion is in abutment with the second surface wall.

[0013] As a further improvement of one embodiment of the present invention, the second limiting portion has an initial end and an end opposite to the initial end along the rotation direction of the first shell, and the second limiting portion also includes a stop portion arranged at the end. When the first shell rotates to the target assembly position, the stop portion abuts against the first limiting portion to prevent the first shell from continuing to rotate.

[0014] As a further improvement of an embodiment of the present invention, the first sealing ring is a rubber ring with a first elastic modulus.

[0015] As a further improvement of an embodiment of the present invention, at the target assembly position, a gap is formed between the circumferential surface of the annular protrusion and the inner wall of the second shell to be filled with sealant.

[0016] Another embodiment of the present invention further provides an ultrasonic head, comprising:

[0017] A first housing, wherein the first housing is a metal shell and has an outer wall. Along the axial direction of the first housing, the first housing has a first end and a second end opposite to each other. The outer wall is provided with an annular protrusion extending in a circumferential direction near the first end, and first limiting portions arranged at intervals. The first limiting portions protrude relative to the annular protrusion in a direction away from the outer wall.

[0018] A second shell, wherein the second shell has a third end and a fourth end opposite to each other in an axial direction of the second shell, the second shell further has a channel passing through the third end and the fourth end, the channel having an inner wall, the third end being provided with a protrusion extending in a circumferential direction and protruding toward the interior of the channel, the protrusion having a first surface wall facing the fourth end, second limiting portions being arranged at intervals along the circumferential direction on the inner wall, the second limiting portions extending in the circumferential direction, and having a second surface wall facing the third end;

[0019] a first sealing ring, the first sealing ring being sleeved outside the outer wall and placed on one side of the annular protrusion;

[0020] An escape area is formed between adjacent first limiting portions. The first shell is placed in the channel and has an initial assembly position and a target assembly position relative to the second shell. In the initial assembly position, the second limiting portion and the escape area are arranged vertically in the axial direction and horizontally in the radial direction. The first end of the first shell is at least partially exposed to the outside of the second shell. The first shell can be rotated relative to the second shell from the initial assembly position to the target assembly position so that the first limiting portion enters between the first surface wall and the second surface wall.

[0021] When in the target assembly position, the first limiting portion is located between the first surface wall and the second surface wall, and the first sealing ring is compressed between the first surface wall and the first limiting portion;

[0022] a third shell, the third shell being encapsulated at the fourth end of the second shell to form an assembly space;

[0023] A transducer is assembled in the assembly space and is used to generate ultrasonic waves.

[0024] As a further improvement of an embodiment of the present invention, at the target assembly position, the first limiting portion has a lower surface wall opposite to the first surface wall, and the first surface wall and the lower surface wall are both continuous surfaces.

[0025] As a further improvement of an embodiment of the present invention, the first limiting portion has an outer circumferential wall, and the outer circumferential walls of multiple first limiting portions are located on the same circumferential surface.

[0026] As a further improvement of one embodiment of the present invention, the annular protrusion and the first limiting portion are integrally formed, and the lower surface wall of the annular protrusion and the lower surface wall of the first limiting portion are located in the same plane, and the upper surface wall of the annular protrusion and the upper surface wall of the first limiting portion are located in the same plane, wherein, in the target assembly position, the lower surface wall of the annular protrusion is in elastic contact with the first sealing ring, and the upper surface wall of the first limiting portion is in abutment with the second surface wall.

[0027] As a further improvement of one embodiment of the present invention, the second limiting portion has an initial end and an end opposite to the initial end along the rotation direction of the first shell, and the second limiting portion also includes a stop portion arranged at the end. When the first shell rotates to the target assembly position, the stop portion abuts against the first limiting portion to prevent the first shell from continuing to rotate.

[0028] As a further improvement of an embodiment of the present invention, the first sealing ring is a rubber ring with a first elastic modulus.

[0029] As a further improvement of an embodiment of the present invention, at the target assembly position, a gap is formed between the circumferential surface of the annular protrusion and the inner wall of the second shell to be filled with sealant.

[0030] As a further improvement of one embodiment of the present utility model, one of the second shell and the third shell is provided with a clip, and the other is provided with a slot, the second shell and the third shell are connected by the clip and the slot, and a second sealing ring is provided between the second shell and the third shell, and the second sealing ring is used to seal the gap between the second shell and the third shell.

[0031] As a further improvement of one embodiment of the present invention, the buckle is arranged on the inner wall of the second shell and is located between two adjacent second limiting portions. When the first shell is in the initial assembly position, the first limiting portion and the buckle are arranged side by side along the circumferential direction.

[0032] An embodiment of the present invention further provides a handheld ultrasonic device, which includes a host and an ultrasonic head according to any of the above embodiments, wherein the ultrasonic head is rotatably detachable and connected to the host.

[0033] The packaging structure and ultrasonic head provided by the utility model can achieve partial sealing between the first shell and the second shell during the assembly process, and the overall assembly structure is simple and the sealing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1This is a three-dimensional schematic diagram of a handheld ultrasound device according to one embodiment of the present invention;

[0035] Figure 2 This is a three-dimensional schematic diagram of an ultrasonic head according to one embodiment of the present invention;

[0036] Figure 3 for Figure 2 A schematic cross-sectional view of an ultrasonic head is shown;

[0037] Figure 4 for Figure 3 A schematic cross-sectional view of the disassembled state shown;

[0038] Figure 5 for Figure 2 A three-dimensional schematic diagram of the first shell shown;

[0039] Figure 6 for Figure 5 Another perspective schematic diagram of the first housing shown;

[0040] Figure 7 for Figure 2 A perspective schematic diagram of the second housing shown;

[0041] Figure 8 Schematic diagram of the initial assembly position;

[0042] Figure 9 Schematic diagram of the target assembly position;

[0043] Figure 10 for Figure 2 A perspective schematic diagram of the second housing shown;

[0044] Figure 11 for Figure 10 Another perspective schematic diagram of the second housing shown;

[0045] Figure 12 for Figure 2 The circuit board schematic is shown. DETAILED DESCRIPTION

[0046] The following detailed description refers to the drawings that form a part of this specification. The exemplary embodiments mentioned in the specification and drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. In light of this application, those skilled in the art will understand that many other embodiments can be adopted and various changes can be made to the described embodiments without departing from the subject matter and scope of protection of the utility model. It should be understood that the various aspects of the present application described and illustrated herein can be arranged, replaced, combined, separated and designed according to many different configurations, and these different configurations are all within the scope of protection of this application.

[0047] The utility model provides a packaging structure. Figure 1 、 Figure 2 The present invention further provides an ultrasonic head 1, wherein the packaging structure is a part of the ultrasonic head 1. The present invention further provides a handheld ultrasonic device, which comprises an ultrasonic head 1 and a host 2, wherein the ultrasonic head 1 is rotatably detachably connected to the host 2.

[0048] See also Figures 2 to 4 In one embodiment of the present invention, the packaging structure includes a first shell 10 and a second shell 20. Figure 5 、 Figure 6 The first housing 10 has an outer wall 11 , and along the axial direction of the first housing 10 , the first housing 10 may have a first end 13 and a second end 14 opposite to each other.

[0049] In this embodiment, the first housing 10 may have a first axis X1, and the outer wall 11 of the first housing 10 may be a circumferential surface centered on the first axis X1. A housing cavity 18 may be formed within the first housing 10. When the packaging structure is used in the ultrasonic head 1, the transducer 50 may be installed in the housing cavity 18.

[0050] The outer wall 11 of the first shell 10 is provided with a circumferentially extending annular protrusion 15 and spaced first limiting portions 16 near the first end 13 . The first limiting portions 16 protrude away from the outer wall 11 relative to the annular protrusion 15 .

[0051] In the embodiment provided by the present invention, the first limiting portion 16 and the annular protrusion 15 are integrally formed. Of course, the first limiting portion 16 and the annular protrusion 15 can also be provided separately.

[0052] See also Figure 7 Along the axial direction of the second housing 20 , the second housing 20 may have a third end 22 and a fourth end 23 opposite to each other. The second housing 20 further has a passage 25 passing through the third end 22 and the fourth end 23 , and the passage 25 has an inner wall 251 .

[0053] In this embodiment, the second housing 20 may have a second axis X2, with the axial direction of the second housing 20 being the direction of the second axis X2. The channel 25 of the second housing 20 may be a cylindrical channel centered on the second axis X2. It will be appreciated that the inner wall 251 of the channel 25 may be an arcuate surface centered on the second axis X2.

[0054] The third end 22 of the second shell 20 is provided with a protrusion 26 extending in the circumferential direction and facing the inside of the channel 25. The protrusion 26 has a first surface wall 261 facing the fourth end 23. The inner wall 251 is arranged with second limiting portions 27 spaced along the circumferential direction near the fourth end 23. The second limiting portions 27 extend in the circumferential direction and have a second surface wall 271 facing the third end 22.

[0055] It will be appreciated that in this embodiment, the protrusion 26 extends about the second axis X2 and can be a flange extending toward the interior of the second housing 20 at the third end 22 of the second housing 20. The second retaining portion 27 also extends about the second axis X2. The first surface wall 261 of the protrusion 26 and the second surface wall 271 of the second retaining portion 27 face each other. The protrusion 26 and the second retaining portion 27 are respectively disposed near the third end 22 and the fourth end 23. Therefore, a gap is left between the first surface wall 261 and the second surface wall 271 to form a receiving groove.

[0056] See also Figure 3 The packaging structure further includes a first sealing ring 40, which is sleeved on the outer wall 11 of the first housing 10 and positioned on one side of the annular protrusion 15. It will be understood that in the axial direction of the first housing 10, the first sealing ring 40 is positioned below the annular protrusion 15 as shown. The first sealing ring 40 can contact the surface of the annular protrusion 15.

[0057] Continue to see Figure 5 、 Figure 6 In this embodiment, an avoidance area 17 is formed between adjacent first limiting portions 16. The first housing 10 is placed in the channel 25 of the second housing 20 and has an initial assembly position and a target assembly position relative to the second housing 20. Figure 8 , is a schematic diagram of the initial assembly position, see Figure 9 , which is a schematic diagram of the target assembly position. In the initial assembly position, the second stopper 27 and the avoidance area 17 are arranged vertically in the axial direction and horizontally in the radial direction, with at least a portion of the first end 13 of the first housing 10 exposed to the exterior of the second housing 20. The first housing 10 can be rotated relative to the second housing 20 from the initial assembly position to the target assembly position, such that the first stopper 16 enters between the first surface wall 261 and the second surface wall 271.

[0058] When the first shell 10 and the second shell 20 are assembled, the first axis X1 of the first shell 10 coincides with the second axis X2 of the second shell 20 , forming a rotation axis when the first shell 10 rotates relative to the second shell 20 .

[0059] When the first housing 10 is in the initial assembly position relative to the second housing 20 , the second limiting portion 27 and the avoidance area 17 are arranged vertically along the rotation axis and horizontally along the radial direction of the rotation axis.

[0060] During assembly, the first housing 10 is first placed into the channel 25 from the fourth end 23 of the second housing 20 to assemble the first housing 10 into the initial assembly configuration. During the placement of the first housing 10 into the channel 25, the second stopper 27 passes through the avoidance area 17, thereby preventing interference between the annular protrusion 15 and the second stopper 27.

[0061] When the first housing 10 is assembled to the initial assembly position, the annular protrusion 15 and the first limiting portion 16 are axially located between the second limiting portion 27 and the protruding portion 26. Circumferentially, the first limiting portion 16 and the second limiting portion 27 are alternately arranged. Specifically, the first limiting portion 16 is located on one side of the receiving groove formed between the first surface wall 261 and the second surface wall 271.

[0062] At this time, rotating the first housing 10 or the second housing 20 allows the first limiting portion 16 to enter the receiving groove between the first surface wall 261 and the second surface wall 271. At the same time, because the first sealing ring 40 is sleeved on the outer wall 11 of the first housing 10, when the first limiting portion 16 enters the receiving groove, the first sealing ring 40 is compressed, thereby sealing the gap between the second surface wall 271, the first limiting portion 16, and the second limiting portion 27.

[0063] In this way, during the process of rotating and assembling the first shell 10 and the second shell 20 , the first shell 10 and the second shell 20 can be sealed, the overall sealing structure is simple, and the assembly process is quick.

[0064] In one embodiment of the present invention, the first sealing ring 40 is a rubber ring with a first elastic modulus. During the assembly process, the first sealing ring 40 is easily compressed and achieves a good sealing effect.

[0065] Furthermore, in one embodiment of the present invention, at the target assembly position, a gap 252 is formed between the circumferential surface 153 of the annular protrusion 15 and the inner wall 251 of the second housing 20 to be filled with sealant.

[0066] In this embodiment, after the first shell 10 is rotated to the target assembly position relative to the second shell 20, the gap 252 between the circumferential surface 153 of the annular protrusion 15 and the inner wall 251 of the second shell 20 can be filled with sealant. The sealant can be a silicone adhesive sealant, which is a neutral silicone sealing material that absorbs air moisture and solidifies at room temperature. It has good bonding, sealing and waterproof properties for plastic and metal materials.

[0067] Furthermore, in one embodiment of the present invention, the first position-limiting portion 16 has a lower surface wall 161 opposite to the first surface wall 261 , and the first surface wall 261 and the lower surface wall 161 of the first position-limiting portion 16 are both continuous surfaces.

[0068] In this embodiment, the first surface wall 261 can form a closed, continuous surface around the second axis X2. The lower surface wall 161 of each first stopper 16 is a continuous arc-shaped surface around the first axis X1, meaning that the first stopper 16 has a specific length. This allows the first surface wall 261 and the first stopper 16 to apply multiple, continuous compression forces to the first sealing ring 40, ensuring a secure seal.

[0069] Furthermore, in one embodiment of the present invention, the first position-limiting portion 16 has an outer circumferential wall 163 , and the outer circumferential walls 163 of the plurality of first position-limiting portions 16 are located on the same circumferential surface.

[0070] In this embodiment, the outer circumferential walls 163 of the plurality of first position-limiting portions 16 are arcuate walls extending about the first axis X1. When the first housing 10 is in the target assembly position relative to the second housing 20, the outer circumferential wall 163 of each first position-limiting portion 16 can correspond to the arcuate profile of the inner wall 251 of the second housing 20, thereby preventing interference during rotation and facilitating rotational assembly.

[0071] Furthermore, in one embodiment of the present invention, the annular protrusion 15 and the first limiting portion 16 are integrally formed, and the lower surface wall 151 of the annular protrusion 15 and the lower surface wall 161 of the first limiting portion 16 are located in the same plane, and the upper surface wall 152 of the annular protrusion 15 and the upper surface wall 162 of the first limiting portion 16 are located in the same plane, wherein, in the target assembly position, the lower surface wall 152 of the annular protrusion 15 is in elastic contact with the first sealing ring 40, and the upper surface wall 162 of the first limiting portion 16 is in contact with the second surface wall 271.

[0072] In this embodiment, the first stopper 16 protrudes only radially relative to the annular protrusion 15, away from the outer wall 11 of the first housing 10, thereby facilitating assembly and manufacturing. Furthermore, because the lower surface wall 161 of the first stopper 16 and the lower surface wall 151 of the annular protrusion 15 are coplanar, they together form a closed annular surface, thereby applying continuous pressure to the first sealing ring 40, achieving an optimal sealing effect.

[0073] Furthermore, in one embodiment of the present invention, along the rotation direction of the first shell 10, the second limiting portion 27 has an initial end 272 and an end 273 opposite to the initial end 272, and the second limiting portion 27 also includes a stop portion 28 arranged at the end 273. When the first shell 10 rotates to the target assembly position, the stop portion 28 abuts against the first limiting portion 16 to prevent the first shell 10 from continuing to rotate.

[0074] In this embodiment, the stop portion 28 may be integrally formed with the second limiting portion 27. The second limiting portion 27 may be an arcuate rib centered on the second axis X2. The stop portion 28 may be a rib extending from the distal end 273 of the second limiting portion 27 toward the third end 22 of the second housing 20. During assembly, when the first housing 10 rotates from the initial assembly position to the target assembly position relative to the second housing 20, the first limiting portion 16 may abut against the stop portion 28 when the first housing 10 rotates to the target assembly position, thereby preventing further rotation of the first housing 10 and ensuring that the first limiting portion 16 cooperates with the receiving groove formed between the first surface wall 261 and the second surface wall 271, achieving a good sealing effect.

[0075] Furthermore, in one embodiment of the present invention, the first housing 10 is a metal shell. When the packaging structure is used for components such as the ultrasound head 1, a transducer 50 can be installed in the first housing 10. The first housing 10 is configured as a metal shell to transmit ultrasound waves.

[0076] The ultrasonic head 1 according to one embodiment of the present invention is described in detail below. The ultrasonic head 1 according to one embodiment of the present invention may include the technical features of the packaging structure in any of the above embodiments.

[0077] The ultrasonic head 1 includes a first housing 10 and an assembly housing. The ultrasonic head 1 may also include a first sealing ring 40. The first housing 10 is a metal housing, and the assembly housing may include a second housing 20 and a third housing 30. The specific structure and relative positional relationship of the first housing 10, second housing 20, and first sealing ring 40 can be found in the packaging structure described above and will not be further described here.

[0078] The third housing 30 is encapsulated at the fourth end 23 of the second housing 20 to form an assembly space.

[0079] The ultrasonic head 1 further includes a transducer 50 , which is assembled in the assembly space and is used to generate ultrasonic waves.

[0080] In this embodiment, the first shell 10 may have a accommodating cavity 18 , the first end 13 of the first shell 10 may be an open end 181 , the second end 14 may be a closed end, and the transducer 50 may be installed inside the accommodating cavity 18 of the first shell 10 .

[0081] The passage 25 of the second shell 20 passes through the third end 22 and the fourth end 23 . It can be understood that the third end 22 and the fourth end 23 of the second shell 20 are both open.

[0082] See also Figure 10 The third housing 30 may have a fifth end 31 and a sixth end 32. The fifth end 31 of the third housing 30 may be inserted into the channel 25 from the fourth end 23 of the second housing 20. The sixth end 32 of the third housing 30 may be provided with a first connecting portion 67. The main unit 2 of the handheld ultrasound device may have a second connecting portion, and the first connecting portion 67 and the second connecting portion may be rotatably assembled and disassembled.

[0083] like Figure 3 As shown, when the first shell 10 , the second shell 20 and the third shell 30 are assembled, the end surface of the fifth end 31 of the third shell 30 can abut against the upper surface wall 162 of the first limiting portion 16 .

[0084] In one embodiment of the present invention, one of the second housing 20 and the third housing 30 is provided with a snap 29, and the other is provided with a slot 33, and the second housing 20 and the third housing 30 are connected by the snap 29 and the slot 33. A second sealing ring 41 is provided between the second housing 20 and the third housing 30, and is used to seal the gap between the second housing 20 and the third housing 30.

[0085] In this embodiment, specifically, the buckle 29 can be provided on the inner wall 251 of the second housing 20, and the slot 33 can be provided on the third housing 30. The second sealing ring 41 can be sleeved on the outside of the third housing 30. The outer wall of the third housing 30 can also be provided with a groove for receiving the second sealing ring 41. When the third housing 30 is assembled with the second housing 20, the second sealing ring 41 can be squeezed by the outer wall of the third housing 30 and the inner wall 251 of the second housing 20, thereby sealing the gap between the second housing 20 and the third housing 30, thereby achieving a sealed assembly between the second housing 20 and the third housing 30.

[0086] Furthermore, in one embodiment of the present invention, the buckle 29 is provided on the inner wall 251 of the second shell 20 and is located between two adjacent second limiting portions 27. When the first shell 10 is in the initial assembly position, the first limiting portion 16 and the buckle 29 are arranged side by side along the circumferential direction.

[0087] In this embodiment, the buckle 29 and the second stopper 27 are both provided on the inner wall 251 of the second housing 20 and are spaced apart along the circumferential direction. The space between the buckle 29 and the second stopper 27 is used to accommodate the first stopper 16 in the initial assembly position. In other words, the space between the buckle 29 and the second stopper 27 can be used to guide the user to assemble the first housing 10 to the correct initial assembly position.

[0088] The ultrasonic head 1 provided in one embodiment of the present invention further includes a circuit board 60. The electrical connection structure of components such as the circuit board 60 and the transducer 50 in the ultrasonic head 1 of the present invention will be described in detail below.

[0089] The ultrasonic head 1 provided in this embodiment includes a first shell 10 and an assembly shell, wherein the first shell 10 is a metal shell having an accommodating cavity 18 formed therein, and the assembly shell is assembled to the first shell 10 to form an assembly space.

[0090] The transducer 50 is mounted in the accommodating cavity 18 and is used to generate ultrasonic waves. Figure 3 、 4 12, the circuit board 60 includes a first conductive end 63 and a second conductive end 64. The first conductive end 63 is electrically connected to the transducer 50, and the second conductive end 64 includes a conductive layer provided on the lower surface 62 of the circuit board 60. The circuit board 60 is placed in the assembly space, and the upper surface 61 of the circuit board 60 at least partially abuts the assembly housing. The conductive layer abuts the first housing 10 to electrically connect the circuit board 60 to the first housing 10. The circuit board 60 forms an electrical circuit with the first housing 10 and the transducer 50 through the first conductive end 63 and the second conductive end 64.

[0091] In this embodiment, the first conductive end 63 and the second conductive end 64 can be formed on the lower surface 62 of the circuit board 60. In the axial direction of the first shell 10, the accommodating cavity 18 can have an open end 181 and a bottom wall 182 opposite to the open end 181. The transducer 50 can be installed on the bottom wall 182 of the accommodating cavity 18. The circuit board 60 can be installed on the open end 181 of the accommodating cavity 18. When the assembly shell is assembled to the first shell 10, the upper surface 61 and the lower surface 62 of the circuit board 60 are respectively in contact with the assembly shell and the first shell 10, that is, at least a portion of the circuit board 60 is clamped between the first shell 10 and the assembly shell, and the first shell 10 and the assembly shell together form a position limit for the circuit board 60.

[0092] The conductive layer of the circuit board 60 abuts against the first shell 10. Since the first shell 10 is a metal shell, the first shell 10 and the circuit board 60 can be directly electrically connected to form an electrical circuit inside the ultrasonic head 1 without the need for additional connecting wires. The overall assembly process is simple and quick.

[0093] Furthermore, in one embodiment of the present invention, the first housing 10 has an open end 181 and a horizontal outer wall 183 surrounding the open end 181 , and the conductive layer abuts against the horizontal outer wall 183 .

[0094] In this embodiment, taking the first axis X1 of the first housing 10 or the second axis X2 of the second housing 20 as a reference, it can be considered that a plane perpendicular to the first axis X1 or the second axis X2 is a horizontal plane.

[0095] The horizontal outer wall 183 of the first housing 10 is perpendicular to the first axis X1. The lower surface 62 of the circuit board 60 can be parallel to the horizontal plane. When the circuit board 60 is installed in the open end 181 of the first housing 10, the conductive layer of the lower surface 62 of the circuit board 60 contacts the horizontal outer wall 183 of the open end 181 of the first housing 10. The conductive layer can include an annular metal ring disposed on the lower surface of the circuit board 60.

[0096] When the assembly shell is assembled to the first shell 10, the assembly shell and the first shell 10 simultaneously apply pressure to the circuit board 60, so that the conductive layer of the circuit board 60 abuts against the horizontal outer wall 183 of the open end 181 of the first shell 10, thereby forming a stable electrical connection.

[0097] Furthermore, in one embodiment of the present invention, the first conductive end 63 includes an elastic conductive member 631 connected to the lower surface 62 of the circuit board 60 . The elastic conductive member 631 abuts against the transducer 50 to electrically connect the circuit board 60 and the transducer 50 .

[0098] In this embodiment, the lower surface 62 of the circuit board 60 is parallel to the transducer 50 and perpendicular to the length of the elastic conductive member 631. When the circuit board 60 is mounted in the first housing 10, the free end of the elastic conductive member 631 contacts the transducer 50. Under the external force applied by the assembled housing and the first housing 10, the elastic conductive member 631 elastically deforms, causing its free end to abut against the transducer 50, thereby forming a stable electrical connection between the transducer 50 and the circuit board 60.

[0099] In this embodiment, no additional wires are required to electrically connect the circuit board 60 and the transducer 50 , so the assembly process is simple and quick, and the electrical connection is more stable.

[0100] Furthermore, in one embodiment of the present invention, the assembly housing has an opening 34. The circuit board 60 includes an exposed portion 65 exposed to the external environment through the opening 34. The circuit board 60 also has a first electrical connector 66, which is used to electrically connect to the second electrical connector of the main unit 2, thereby transmitting electrical signals between the main unit 2 and the ultrasound head 1 of the handheld ultrasound device. The first electrical connector 66 is disposed on the exposed portion 65 of the circuit board 60. The ultrasound head 1 also includes a third sealing ring 42 surrounding the opening 34, which is used to seal the gap between the circuit board 60 and the assembly housing.

[0101] It can be understood that in this embodiment, the exposed portion 65 of the circuit board 60 and the first electrical connector 66 provided on the exposed portion 65 are both located in the internal area enclosed by the third sealing ring 42. By providing the third sealing ring 42, external liquid can be prevented from entering the interior of the ultrasonic head 1 through the gap between the circuit board 60 and the assembly shell, causing damage to the ultrasonic head 1.

[0102] Furthermore, in one embodiment of the present invention, the assembly housing is provided with a positioning post 35 , and the circuit board 60 has a positioning hole 68 that cooperates with the positioning post 35 .

[0103] In this embodiment, the assembly housing includes a second housing 20 and a third housing 30, wherein the positioning post 35 can be provided on the third housing 30. The third housing 30 can have a lower surface wall opposite to the circuit board 60. Specifically, the positioning post 35 can be provided on the lower surface wall of the third housing 30. During the assembly process, the first housing 10 and the second housing 20 can be assembled first, and then the circuit board 60 can be assembled to the third housing 30. The position of the circuit board 60 is defined by the cooperation of the positioning post 35 and the positioning hole 68. The third housing 30 and the circuit board 60 are then assembled to the second housing 20. By providing the positioning post 35 and the positioning hole 68, it can be ensured that the conductive layer of the circuit board 60 and the first housing 10 can be assembled and contacted in the correct position, thereby ensuring the effectiveness of the electrical connection between the circuit board 60 and the first housing 10.

[0104] To sum up, the ultrasonic head 1 provided by the present invention can quickly seal the first shell 10, the second shell 20 and the third shell 30 during the assembly process. At the same time, by setting the first sealing ring 40, the second sealing ring 41, the third sealing ring 42, and further sealing the gap by injecting glue, a better sealing effect can be achieved. The ultrasonic head 1 has a high waterproof level and is easy for users to clean.

[0105] In addition, the ultrasonic head 1 provided by the present invention can complete the electrical connection of the circuit board 60, the first shell 10, and the transducer 50 during the assembly process to form an electrical circuit without setting up wires. The overall assembly process is simple and fast, and the electrical connection is stable.

[0106] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0107] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A packaging structure, characterized in that: include: a first housing, the first housing having an outer wall, and along the axial direction of the first housing, the first housing having a first end and a second end opposite to each other, the outer wall being provided with an annular protrusion extending in a circumferential direction near the first end, and first limiting portions arranged at intervals, the first limiting portions protruding relative to the annular protrusion in a direction away from the outer wall; A second shell, wherein the second shell has a third end and a fourth end opposite to each other along the axial direction of the second shell, the second shell further has a channel passing through the third end and the fourth end, the channel having an inner wall, the third end being provided with a protrusion extending in a circumferential direction and protruding toward the interior of the channel, the protrusion having a first surface wall facing the fourth end, the inner wall being provided with second limiting portions spaced apart in the circumferential direction near the fourth end, the second limiting portions extending in the circumferential direction, and the second limiting portions having a second surface wall facing the third end; a first sealing ring, the first sealing ring being sleeved on the outer wall and placed on one side of the annular protrusion; wherein, an escape area is formed between adjacent first limiting portions; the first shell is placed in the channel and has an initial assembly position and a target assembly position relative to the second shell; in the initial assembly position, the second limiting portion and the escape area are arranged vertically in the axial direction and horizontally in the radial direction; at least a portion of the first end of the first shell is exposed to the outside of the second shell; the first shell can be rotated relative to the second shell from the initial assembly position to the target assembly position so that the first limiting portion enters between the first surface wall and the second surface wall; In the target assembly position, the first limiting portion is located between the first surface wall and the second surface wall, and the first sealing ring is compressed between the first surface wall and the first limiting portion.

2. The packaging structure according to claim 1, wherein: At the target assembly position, the first limiting portion has a lower surface wall opposite to the first surface wall, and the first surface wall and the lower surface wall are both continuous surfaces.

3. The packaging structure according to claim 1, wherein: The first shell is a metal shell.

4. The packaging structure according to claim 1, wherein: The first limiting portion has an outer circumferential wall, and the outer circumferential walls of the plurality of first limiting portions are located on the same circumferential surface.

5. The packaging structure according to any one of claims 1 to 4, wherein: The annular protrusion is integrally formed with the first limiting portion, and the lower surface wall of the annular protrusion and the lower surface wall of the first limiting portion are located in the same plane, and the upper surface wall of the annular protrusion and the upper surface wall of the first limiting portion are located in the same plane, wherein, in the target assembly position, the lower surface wall of the annular protrusion is in elastic contact with the first sealing ring, and the upper surface wall of the first limiting portion is in abutment with the second surface wall.

6. The packaging structure according to claim 1, wherein: The second limiting portion has an initial end and an end opposite to the initial end along the rotation direction of the first shell. The second limiting portion also includes a stop portion arranged at the end. When the first shell rotates to the target assembly position, the stop portion abuts against the first limiting portion to prevent the first shell from continuing to rotate.

7. The packaging structure according to claim 1, wherein: The first sealing ring is a rubber ring with a first elastic modulus.

8. The packaging structure according to claim 1, wherein: At the target assembly position, a gap is formed between the circumferential surface of the annular protrusion and the inner wall of the second housing to be filled with sealant.

9. An ultrasonic head, characterized in that: include: A first housing, wherein the first housing is a metal shell and has an outer wall. Along the axial direction of the first housing, the first housing has a first end and a second end opposite to each other. The outer wall is provided with an annular protrusion extending in a circumferential direction near the first end, and first limiting portions arranged at intervals. The first limiting portions protrude relative to the annular protrusion in a direction away from the outer wall. A second shell, wherein the second shell has a third end and a fourth end opposite to each other in an axial direction of the second shell, the second shell further has a channel passing through the third end and the fourth end, the channel having an inner wall, the third end being provided with a protrusion extending in a circumferential direction and protruding toward the interior of the channel, the protrusion having a first surface wall facing the fourth end, second limiting portions being arranged at intervals along the circumferential direction on the inner wall, the second limiting portions extending in the circumferential direction, and having a second surface wall facing the third end; a first sealing ring, the first sealing ring being sleeved outside the outer wall and placed on one side of the annular protrusion; An escape area is formed between adjacent first limiting portions. The first shell is placed in the channel and has an initial assembly position and a target assembly position relative to the second shell. In the initial assembly position, the second limiting portion and the escape area are arranged vertically in the axial direction and horizontally in the radial direction. The first end of the first shell is at least partially exposed to the outside of the second shell. The first shell can be rotated relative to the second shell from the initial assembly position to the target assembly position so that the first limiting portion enters between the first surface wall and the second surface wall. When in the target assembly position, the first limiting portion is located between the first surface wall and the second surface wall, and the first sealing ring is compressed between the first surface wall and the first limiting portion; a third shell, the third shell being encapsulated at the fourth end of the second shell to form an assembly space; A transducer is assembled in the assembly space and is used to generate ultrasonic waves.

10. The ultrasonic head according to claim 9, characterized in that At the target assembly position, the first limiting portion has a lower surface wall opposite to the first surface wall, and the first surface wall and the lower surface wall are both continuous surfaces.

11. The ultrasonic head according to claim 9, wherein: The first limiting portion has an outer circumferential wall, and the outer circumferential walls of the plurality of first limiting portions are located on the same circumferential surface.

12. The ultrasonic head according to any one of claims 9 to 11, characterized in that: The annular protrusion is integrally formed with the first limiting portion, and the lower surface wall of the annular protrusion and the lower surface wall of the first limiting portion are located in the same plane, and the upper surface wall of the annular protrusion and the upper surface wall of the first limiting portion are located in the same plane, wherein, in the target assembly position, the lower surface wall of the annular protrusion is in elastic contact with the first sealing ring, and the upper surface wall of the first limiting portion is in abutment with the second surface wall.

13. The ultrasonic head according to claim 9, wherein: The second limiting portion has an initial end and an end opposite to the initial end along the rotation direction of the first shell. The second limiting portion also includes a stop portion arranged at the end. When the first shell rotates to the target assembly position, the stop portion abuts against the first limiting portion to prevent the first shell from continuing to rotate.

14. The ultrasonic head according to claim 9, wherein: The first sealing ring is a rubber ring with a first elastic modulus.

15. The ultrasonic head according to claim 9, wherein At the target assembly position, a gap is formed between the circumferential surface of the annular protrusion and the inner wall of the second housing to be filled with sealant.

16. The ultrasonic head according to claim 9, wherein: One of the second shell and the third shell is provided with a snap fastener, and the other is provided with a slot. The second shell and the third shell are connected by the snap fastener and the slot. A second sealing ring is provided between the second shell and the third shell. The second sealing ring is used to seal the gap between the second shell and the third shell.

17. The ultrasonic head according to claim 16, wherein: The buckle is provided on the inner wall of the second shell and is located between two adjacent second limiting portions. When the first shell is in the initial assembly position, the first limiting portions and the buckle are arranged side by side along the circumferential direction.

18. A handheld ultrasonic device, characterized in that: It comprises a host and an ultrasonic head according to any one of claims 9 to 17, wherein the ultrasonic head is rotatably detachably connected to the host.

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